FIVE NODAL POINT PRESSURE-EQUALISING DEVICE OF STEEL ROPE SETS FOR ELEVATOR

Abstract

 Disclosed is a five nodal point pressure-equalising device of steel rope sets for an elevator, wherein two second spherical nodal points (35) capable of oscillating are provided symmetrically on the two nodal point pressure-equalising assembly;three non-collinear second spherical nodal points (35) capable of oscillating are provided on the three nodal point pressure-equalising assembly (3); the oscillation centre of the two nodal point pressure-equalising assembly (2) is on the same horizontal plane as the oscillation centre of two first spherical nodal points (26) provided thereon, and is collinear; the oscillation centre of the two nod -al point pressure-equalising assembly (2), the oscillation centre of a balancing seat (1) and the oscillation centre of the three nodal point pressure-equalising assembly (3) are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly (2) to the oscillation centre of the balancing seat (1) is 1.5 times the dis-tance from the oscillation centre of the three nodal point pressure-equalising assembly (3) to the oscillation centre of the balancing seat (1). The present pressure-equalising device can automatically adjust the pressure sustained by five sets of steel ropes, ultimately making the pressure sustained by each set of steel ropes the same, thereby enabling the damage caused by unequal pressure sustained by steel ropes for an elevator to be overcome.

Description

Technical Field

[0001] The invention relates to a pressure-equalising device of steel cable sets for an elevator, and more particularly, to a five nodal point pressure-equalising device of steel cable sets or an elevator capable of adjusting a pressure sustained to five steel cable sets and enabling the pressure sustained to each steel cable set to be the same.

Background Art

[0002] At present, domestic and overseas elevators generally adopts a traction machine to drive. A traction elevator suspending and lifting system is composed of a traction wheel, a steel rope set, a car platform sill, a balance block system and other main parts; a friction force generated by winding each steel rope of the steel rope set in a groove of the traction wheel in the traction elevator suspending and lifting system provides a power for the car platform sill to lift up or down; under the adjustment that the elevator driving technology keeps developing, both the lifting height of the elevator and the running speed are greatly improved, at the same time, higher requirements are also proposed on the safety and the reliability of the elevator. Theoretically, the pressure sustained to each steel rope in the steel rope set shall be the same in the using process of the elevator, and the shape and the size of the groove for winding the steel rope on the traction wheel shall also be the same; but in the actually using process, the pressure sustained to each steel rope in the steel rope set shall be different due to various reasons, this results in a situation that some steel ropes are pressured highly and some steel ropes are pressured lowly; the friction force between the highly-pressured steel rope and the groove on the corresponding traction wheel will relatively higher, this results in a condition that the friction of the groove on the corresponding traction wheel is more severe, so the shape and the size of the groove on the corresponding traction wheel are changed over time, resulting in that the highly-pressured steel rope is pressured more and more in work. If the radius of the worn groove on the traction wheel is reduced by 0.1mm, the steel rope will move less than 0.314mm when the traction wheel wriggle every turn; by taking the 20-storey building for example, the traction wheel will wriggle about 100 turns, so the steel rope will move less than 31.4mm. Through test, it is discovered that the steel rope will forced more than about 3000N; when the steel rope in the steel rope set is forced unevenly, a wriggling phenomenon is generated between the lowly-forced steel rope and the traction wheel, the wriggling between the steel rope and the traction wheel will cause the abrasion of the steel rope and the traction wheel; the higher the storey is, the more severe the situation above becomes. Therefore, the highly-pressured steel rope used for a long time is easy to break in the using process, resulting in safety accidents of the elevator; at the same time, the lowly-pressured steel rope will also be damaged due to the abrasion of the traction wheel. If the damage is severe, the steel rope will also be broken to result in the safety accidents of the elevator; for this reason, we develop a two nodal pressure-equalising device of steel rope sets for an elevator capable of adjusting the pressure to two steel rope sets and enabling these two steel rope sets to pressure the same.

Summary of the Invention

[0003] The object of the invention is to overcome the shortages of the prior art and is intended to provide a five nodal pressure-equalising device of steel rope sets for an elevator capable of adjusting the pressure to five steel rope sets and enabling each steel rope set to pressure the same.

[0004] In order to achieve the object above, the present invention adopts the main technical solution as follows: a five nodal point pressure-equalising device of steel rope sets for an elevator includes a balancing seat, a two nodal point pressure-equalising assembly and a three nodal point pressure-equalising assembly, wherein the balancing seat can be rotatably provided on the base seat; the two nodal point pressure-equalising assembly can be rotatably provided at one end of the balancing seat; the three nodal point pressure-equalising assembly can be roatably provided at the other end of the balancing seat; two first spherical nodal points are symmetrically provided on the two nodal point pressure-equalising assembly along the centre plane thereof; the oscillation centre of the two nodal point pressure-equalising assembly is located on the centre plane thereof; the centre of each first spherical nodal point is provided with a first through hole; the first through hole is used for mounting the steel ropes; three second spherical nodal points are provided on the three nodal point pressure-equalising assembly; these three second spherical nodal points are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the centre of each second spherical nodal point is provided with a second through hole; the second through hole is used for mounting the steel ropes; the oscillation centre of the three nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of three second spherical nodal points provided thereon; the oscillation centre of the two nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of two first spherical nodal points provided thereon, and is collinear; the oscillation centre of the two nodal point pressure-equalising assembly, the oscillation centre of the balancing seat and the oscillation centre of the three nodal point pressure-equalising assembly are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly to the oscillation centre of the balancing seat is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly to the oscillation centre of the balancing seat.

[0005] Preferably, the bottom of the balancing seat is provided with a first spherical bump; the base is provided with a first spherical cavity; the first spherical bump is placed in the first spherical cavity, and the first spherical bump can oscillate around the first spherical cavity.

[0006] Preferably, the centre plane of the two nodal point pressure-equalising assembly is overlapped with the centre plane of an oscillation frame provided thereon; the bottom of the oscillation frame is provided with a second spherical bump; one end of the balancing seat is provided with a second spherical cavity, while the other end thereof is provided with a third spherical cavity; the second spherical bump is arranged in the second spherical cavity; the second spherical cavity can oscillate around the second spherical cavity; the lower portion of the three nodal point pressure-equalising assembly is provided with a third spherical bump; the oscillation centre of the third spherical bump is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the third spherical bump is arranged in the third spherical cavity; and the third spherical bump can oscillate around the three spherical cavity.

[0007] Preferably, two fourth spherical cavities are symmetrically provided on the two nodal point pressure-equalising assembly along the centre plane thereof; each fourth spherical cavity is provided with a first spherical nodal point, and each first spherical nodal point can oscillate around the fourth spherical cavity thereof.

[0008] Preferably, the two nodal point pressure-equalising assembly is provided with a first screw hole, and a screw can fix the oscillation frame at the lower portion of the two nodal point pressure-equalising assembly via the first screw hole.

[0009] Preferably, three fifth spherical cavities are provided on the three nodal point pressure-equalising assembly; these three fifth spherical cavities are not collinear; each fifth spherical cavity is provided with a second spherical nodal point, and each second spherical nodal point can oscillate around the fifth spherical cavity thereof.

[0010] Preferably, the three nodal point pressure-equalising assembly is provided with a second screw hole, and the three spherical bump can be fixed at the lower portion of the three nodal point pressure-equalising assembly via the second screw hole.

[0011] Preferably, the base seat is uniformly distributed with fixed holes to conveniently mount the base seat.

[0012] Preferably, the five nodal point pressure-equalising device is mounted at the head or the tail of the steel rope.

[0013] Due to the application of the foregoing technical solution, the present invention has the following advantages compared to the prior art:

[0014] According to the five nodal point pressure-equalising device of the steel rope sets for the elevator described in the present invention, wherein the two nodal point pressure-equalising assembly and the three nodal point pressure-equalising assembly can oscillate around the balancing seat respectively; the balancing seat can oscillate around the base seat, two second spherical nodal points are symmetrically provided on the two nodal point pressure-equalising assembly, each second spherical nodal point can oscillate around the two nodal point pressure-equalising assembly, 3 second spherical nodal points are provided on the three nodal point pressure-equalising assembly; these three second spherical nodal points are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; in the meantime, the oscillation centre of the three nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of three second spherical nodal points provided thereon; the oscillation centre of the two nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of two first spherical nodal points provided thereon, and is collinear; the oscillation centre of the two nodal point pressure-equalising assembly, the oscillation centre of the balancing seat and the oscillation centre of the three nodal point pressure-equalising assembly are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly to the oscillation centre of the balancing seat is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly to the oscillation centre of the balancing seat. The device according to the solution of the present invention can adjust the pressure sustained by five sets of steel ropes, and when a stable state is reached, the pressure sustained by each steel rope set will be the same, thereby enabling the damage caused by unequal pressure sustained by the steel rope set for the elevator to be overcome, increasing the service life of the steel ropes, and improving the safety of the elevator.

Brief Description of the Drawings

[0015] The technical scheme of the invention will be further described hereinafter with reference to the drawings.

Fig. 1 is a local sectional vie of a five nodal point pressure-equalising device of steel rope sets for an elevator described in the present invention;

Fig. 2 is an enlarged drawing of an A-A sectional view in Fig. 1;

Fig. 3 is an enlarged drawing of a front view of a three nodal point pressure-equalising assembly for five nodal point pressure-equalising device of steel rope sets for an elevator described in the present invention; and

Fig. 4 is a B-B sectional view in Fig. 3;

Wherein: 1. balancing seat; 2. two nodal point pressure-equalising assembly; 3. three nodal point pressure-equalising assembly; 4. second spherical cavity; 5. third spherical cavity; 6. first spherical bump; 7. first spherical cavity; 8. base seat; 9. fixed hole; 21. two nodal point pressure-equalising assembly main body; 22. fourth spherical cavity; 23. first screw hole; 24. oscillation frame; 25. second spherical bump; 26. first spherical nodal point; 27. first through hole; 31. three nodal point pressure-equalising assembly main body; 32. fifth spherical cavity; 33. second screw hole; 34. third spherical bump; 35. second spherical nodal point; 36. second through hole.

Detailed Description of the Preferred Embodiments

[0016] The present invention will be further described in details hereinafter with reference to the drawings and the specific embodiments.

[0017] Fig. 1, Fig, 2, Fig, 3 and Fig. 4 show a five nodal point pressure-equalising device of steel rope sets for an elevator described in the present invention, which is mounted at the head or the tail of the steel rope and includes a balancing seat 1, a base seat 8, a two nodal point pressure-equalising assembly 2 and a three nodal point pressure-equalising assembly 3, wherein the balancing seat 1 can be rotatably provided on the base seat 8; the two nodal point pressure-equalising assembly 2 and the three nodal point pressure-equalising assembly 3 are respectively provided with a centre symmetry structure, wherein the two nodal point pressure-equalising assembly 2 can be rotatably provided at one end of the balancing seat; the three nodal point pressure-equalising assembly can be roatably provided at the other end of the balancing seat; two first spherical nodal points 26 are symmetrically provided on the two nodal point pressure-equalising assembly 2 along the centre plane thereof; the oscillation centre of the two nodal point pressure-equalising assembly 2 is located on the centre plane thereof; the centre of each first spherical nodal point 26 is provided with a first through hole 27; the first through hole 24 is used for mounting the steel ropes (without being shown); three second spherical nodal points 35 are provided on the three nodal point pressure-equalising assembly 3; these three second spherical nodal points 35 are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly 3 is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly 3 and perpendicular to the three nodal point pressure-equalising assembly 3; the centre of each second spherical nodal point 35 is provided with a second through hole 36; the second through hole 36 is used for mounting the steel ropes (without being shown); the oscillation centre of the three nodal point pressure-equalising assembly 3 is on the same horizontal plane as the oscillation centre of three second spherical nodal points 35 provided thereon; the oscillation centre of the two nodal point pressure-equalising assembly 2 is on the same horizontal plane as the oscillation centre of two first spherical nodal points 26 provided thereon, and is collinear; the oscillation centre of the two nodal point pressure-equalising assembly 2, the oscillation centre of the balancing seat 1 and the oscillation centre of the three nodal point pressure-equalising assembly 3 are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly 2 to the oscillation centre of the balancing seat 1 is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly 3 to the oscillation centre of the balancing seat.

[0018] In the embodiment, as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the bottom of the balancing seat 1 is provided with a first spherical bump 6; the base seat 8 is provided with a first spherical cavity 7; the first spherical bump 6 is placed into the first spherical cavity 7, the first spherical bump 6 can oscillate around the first spherical cavity 7; the lower portion of the two nodal point pressure-equalising assembly 2 is provided with an oscillation frame 24, the centre plane of the two nodal point pressure-equalising assembly 2 is overlapped with the centre plane of the oscillation frame 24 provided thereon; the bottom of the oscillation frame 24 is provided with a second spherical bump 25; one end of the balancing seat 1 is provided with a second spherical cavity 4; the other end is provided with a third spherical cavity 5; the second spherical bump 25 is arranged in the second spherical cavity 4; the second spherical bump 25 can oscillate around the second spherical cavity 4; the lower portion of the three nodal point pressure-equalising assembly is provided with a third spherical bump 34; the oscillation centre of the third spherical bump 34 is located on the straight line passing through the centre of gravity of the three pressure-equalising assembly 3 and perpendicular to the three pressure-equalising assembly; the third spherical bump 34 is arranged in the third spherical cavity 5; the third spherical bump 34 can oscillate around the third spherical cavity 5; 2 fourth spherical cavities 22 are symmetrically provided on the two pressure-equalising assembly 2 along the centre plane thereof; each fourth spherical cavity 22 is internally equipped with a first spherical nodal point 26; each first spherical nodal point 26 can oscillation around the fourth spherical cavity 22; the two pressure-equalising assembly 2 is provided with a first screw hole 23, the oscillation frame 24 can be fixed at the lower portion of the two pressure-equalising assembly 2 through the first screw hole 23; the three pressure-equalising assembly 3 is provided with 3 fifth spherical cavities 32; these three fifth spherical cavities 32 are not collinear; each fifth spherical cavity 32 is internally provided with a second spheral nodal point 35, each second spherical nodal point 35 can oscillate around the fifth spherical cavity 32 provided with the second spherical nodal point 35; the three pressure-equalising assembly 3 is provided with a second screw hole 33, the third spherical nodal point 35 can be fixed at the lower portion of the three pressure-equalising assembly 3 via the second screw hole 33; and the base seat 8 is uniformly distributed with fixed holes 9 to conveniently mount the base seat 8.

[0019] The five nodal point pressure-equalising device of the steel rope sets for the elevator described in the present invention can be served as a unit applied in the multiple nodal point pressure-equalising device, for instance, twelve nodal point pressure-equalising device, or two nodal point pressure-equalising device. At this point, the base seat 8 is the balancing seat 1.

[0020] Due to the application of the foregoing technical solution, the present invention has the following advantages compared to the prior art:

[0021] According to the five nodal point pressure-equalising device of the steel rope sets for the elevator described in the present invention, wherein the two nodal point pressure-equalising assembly and the three nodal point pressure-equalising assembly can oscillate around the balancing seat respectively; the balancing seat can oscillate around the base seat, two second spherical nodal points are symmetrically provided on the two nodal point pressure-equalising assembly, each second spherical nodal point can oscillate around the two nodal point pressure-equalising assembly, 3 second spherical nodal points are provided on the three nodal point pressure-equalising assembly; these three second spherical nodal points are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; in the meantime, the oscillation centre of the three nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of three second spherical nodal points provided thereon; the oscillation centre of the two nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of two first spherical nodal points provided thereon, and is collinear; the oscillation centre of the two nodal point pressure-equalising assembly, the oscillation centre of the balancing seat and the oscillation centre of the three nodal point pressure-equalising assembly are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly to the oscillation centre of the balancing seat is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly to the oscillation centre of the balancing seat. In this way, the five nodal point pressure-equalising device according to the present invention enables each independent traction steel rope to have a mechanics relationship correlative to the other steel rope by means of an oscillating bar and the lever principle. Through this combination mechanism, the change in the pressure sustained to any steel rope will transmit to the spherical nodal point and enable the spherial nodal point to oscillate under the condition that the pressure is sustained to the traction steel rope set. The pressure oscillation of the spherical nodal point will enable the corresponding two nodal point pressure-equalising assembly or 3 nodal point pressure-equalising assembly to oscillate around the oscillation centre thereof. In this way, the pressure sustained to the respective spherical nodal point is balanced, i.e., the pressure sustained to each set of steel rope is the same by means of the lever principle (the moment is equal to the pressure multiplying by the distance). At the same time, the pressure oscillation of the two nodal point pressure-equalising assembly or 3 nodal point pressure-equalising assembly will also result in oscillating the balancing seat 1 on the base seat 8. In this way, the whole pressure between the two nodal point pressure-equalising assembly and the 3 nodal point pressure-equalising assembly is balanced; and each set of steel rope and the other set of steel rope can also be balanced by the lever principle. In this way, each traction steel rope is correlated by a balancing mechanism composed of a set of correlative lever and oscillating bar, and each steel rope is provided with a component pressure in fixed proportion in the whole set of traction steel rope to enable the pressure sustained to each traction steel rope, achieving the purpose of consistent friction force generated by winding each traction rope in the elevator traction steel rope set in the traction wheel groove.

[0022] The device according to the solution of the present invention can adjust the pressure sustained by five sets of steel ropes, and when a stable state is reached, the pressure sustained by each steel rope set will be the same, thereby enabling the damage caused by unequal pressure sustained by the steel rope set for the elevator to be overcome, increasing the service life of the steel ropes, and improving the safety of the elevator.

[0023] The embodiments above are only for describing the technical through and features of the invention, with a view to enabling the technical personnel who are familiar with the technology to understand the content of the invention and implement, but not intended to limit the protection scope of the present invention. Any equivalent change or modification made according to the spiritual essence of the present invention shall all fall within the protection scope of the present invention.

Claims

1. A five nodal point pressure-equalising device of steel rope sets for an elevator, comprising a balancing seat, a base seat, a two nodal point pressure-equalising assembly and a three nodal point pressure-equalising assembly, wherein the balancing seat can be rotatably provided on the base seat; the two nodal point pressure-equalising assembly can be rotatably provided at one end of the balancing seat; the three nodal point pressure-equalising assembly can be roatably provided at the other end of the balancing seat; two first spherical nodal points are symmetrically provided on the two nodal point pressure-equalising assembly along the centre plane thereof; the oscillation centre of the two nodal point pressure-equalising assembly is located on the centre plane thereof; the centre of each first spherical nodal point is provided with a first through hole; the first through hole is used for mounting the steel ropes; three second spherical nodal points are provided on the three nodal point pressure-equalising assembly; these three second spherical nodal points are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the centre of each second spherical nodal point is provided with a second through hole; the second through hole is used for mounting the steel ropes; the oscillation centre of the three nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of three second spherical nodal points provided thereon; the oscillation centre of the two nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of two first spherical nodal points provided thereon, and is collinear; the oscillation centre of the two nodal point pressure-equalising assembly, the oscillation centre of the balancing seat and the oscillation centre of the three nodal point pressure-equalising assembly are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly to the oscillation centre of the balancing seat is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly to the oscillation centre of the balancing seat.

2. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 1, wherein the bottom of the balancing seat is provided with a first spherical bump; the base seat is provided with a first spherical cavity; the first spherical bump is placed in the first spherical cavity, and the first spherical bump can rotate around the first spherical cavity.

3. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 1, wherein the centre plane of the two nodal point pressure-equalising assembly is overlapped with the centre plane of an oscillation frame provided thereon; the bottom of the oscillation frame is provided with a second spherical bump; one end of the balancing seat is provided with a second spherical cavity, while the other end thereof is provided with a third spherical cavity; the second spherical bump is arranged in the second spherical cavity; the second spherical cavity can oscillate around the second spherical cavity; the lower portion of the three nodal point pressure-equalising assembly is provided with a third spherical bump; the oscillation centre of the third spherical bump is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the third spherical bump is arranged in the third spherical cavity; and the third spherical bump can oscillate around the three spherical cavity.

4. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 1 or 3, wherein two fourth spherical cavities are symmetrically provided on the two nodal point pressure-equalising assembly along the centre plane thereof; each fourth spherical cavity is provided with a first spherical nodal point, and each first spherical nodal point can oscillate around the fourth spherical cavity thereof.

5. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 3, wherein the two nodal point pressure-equalising assembly is provided with a first screw hole, and the oscillation frame can be fixed at the lower portion of the two nodal point pressure-equalising assembly via the first screw hole.

6. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 1 or 3, wherein three fifth spherical cavities are provided on the three nodal point pressure-equalising assembly; these three fifth spherical cavities are not collinear; each fifth spherical cavity is provided with a second spherical nodal point, and each second spherical nodal point can oscillate around the fifth spherical cavity thereof.

7. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 3, wherein the three nodal point pressure-equalising assembly is provided with a second screw hole, and the oscillation frame can be fixed at the lower portion of the three nodal point pressure-equalising assembly via the second screw hole.

8. The five nodal point pressure-equalising of the steel cable set for the elevator according to claim 1 or 2 or 3 or 5 or 7, wherein the base seat is uniformly distributed with fixed holes to conveniently mount the base seat.

9. A five nodal point pressure-equalising device of steel rope sets for an elevator, comprising a balancing seat, a base seat, a two nodal point pressure-equalising assembly and a three nodal point pressure-equalising assembly, wherein the balancing seat can be rotatably provided on the base seat; the two nodal point pressure-equalising assembly can be rotatably provided at one end of the balancing seat; the three nodal point pressure-equalising assembly can be roatably provided at the other end of the balancing seat; the two nodal point pressure-equalising assembly is provided with a central symmetrical structure and is symmetrically provided with 2 first spherical nodal points along the centre plane thereof for mounting the steel ropes respectively; the three nodal point pressure-equalising assembly is provided with a central symmetrical structure and is provided with 3 second spherical nodal points for mounting the steel ropes respectively; the oscillation centre of the two nodal point pressure-equalising assembly, the oscillation centre of the balancing seat and the oscillation centre of the three nodal point pressure-equalising assembly are on the same horizontal plane, and are collinear; and the distance from the oscillation centre of the two nodal point pressure-equalising assembly to the oscillation centre of the balancing seat is 1.5 times the distance from the oscillation centre of the three nodal point pressure-equalising assembly to the oscillation centre of the balancing seat.

10. The five nodal point pressure-equalising of the steel cable set for the elevator according to claim 9, wherein the oscillation centre of the two nodal point pressure-equalising assembly is located on the centre plane thereof; the centre of each first spherical Inodal point is provided with a first through hole; and the first through hole is used for mounting the steel ropes.

11. The five nodal point pressure-equalising of the steel cable set for the elevator according to claim 9, wherein these three second spherical nodal points are not on the same straight line; the oscillation centre of the three nodal point pressure-equalising assembly is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the centre of each second spherical nodal point is provided with a second through hole; the second through hole is used for mounting the steel ropes; and the oscillation centre of the three nodal point pressure-equalising assembly is on the same horizontal plane as the oscillation centre of three second spherical nodal points provided thereon.

12. The five nodal point pressure-equalising device of the steel rope set for the elevator according to claim 9, wherein the bottom of the balancing seat is provided with a first spherical bump; the base seat is provided with a first spherical cavity; the first spherical bump is placed in the first spherical cavity, and the first spherical bump can rotate around the first spherical cavity.

13. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 9, wherein the centre plane of the two nodal point pressure-equalising assembly is overlapped with the centre plane of an oscillation frame provided thereon; the bottom of the oscillation frame is provided with a second spherical bump; one end of the balancing seat is provided with a second spherical cavity, while the other end thereof is provided with a third spherical cavity; the second spherical bump is arranged in the second spherical cavity; the second spherical cavity can oscillate around the second spherical cavity; the lower portion of the three nodal point pressure-equalising assembly is provided with a third spherical bump; the oscillation centre of the third spherical bump is located on the straight line passing through the centre of gravity of the three nodal point pressure-equalising assembly and perpendicular to the three nodal point pressure-equalising assembly; the third spherical bump is arranged in the third spherical cavity; and the third spherical bump can oscillate around the three spherical cavity.

14. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 9, wherein two fourth spherical cavities are symmetrically provided on the two nodal point pressure-equalising assembly along the centre plane thereof; each fourth spherical cavity is provided with a first spherical nodal point, and each first spherical nodal point can oscillate around the fourth spherical cavity thereof.

15. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 9, wherein the two nodal point pressure-equalising assembly is provided with a first screw hole, and a screw can fix the oscillation frame at the lower portion of the two nodal point pressure-equalising assembly via the first screw hole.

16. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 9, wherein three fifth spherical cavities are provided on the three nodal point pressure-equalising assembly; these three fifth spherical cavities are not collinear; each fifth spherical cavity is provided with a second spherical nodal point, and each second spherical nodal point can oscillate around the fifth spherical cavity thereof.

17. The five nodal point pressure-equalising device of the steel rope sets for the elevator according to claim 13, wherein the three nodal point pressure-equalising assembly is provided with a second screw hole, and the oscillation frame can be fixed at the lower portion of the three nodal point pressure-equalising assembly via the second screw hole.

18. The five nodal point pressure-equalising device of the steel cable set for the elevator according to claim 9, wherein the five nodal point pressure-equalising device is mounted at the head or the tail of the steel rope.

Drawing