Replacement and urging device for the bucket teeth of an engineering construction machine

Abstract

 A replacement and urging device for the bucket teeth of an engineering construction machine is disclosed. An adapter (1) is mounted with a bucket tooth (5). A first through hole (121) goes horizontally through the adapter (1). Both sides of the bucket tooth (5) are formed with a second through hole (52), respectively. An engaging unit (7) is interposed between the first through hole (121) and the second through holes (52) to slide between them. This enables the bucket tooth (5) to be mounted and positioned on the adapter (1). The invention thus prevents the tooth (5) from constantly hitting the adapter (1).

Description

BACKGROUND OF THE INVENTION

Field of Invention

[0001] The invention relates to a replacement and urging device for the bucket teeth of an engineering construction machine and, in particular, to a replacement and urging device for the bucket teeth of an engineering construction machine that prevents the bucket teeth from hitting the base repeatedly.

Related Art

[0002] FIG. 8 shows a conventional excavator bucket tooth structure. A bucket is formed with several equally spaced bucket teeth 9. Each of the bucket teeth 9 includes an adapter 90 and a bucket tooth 91. The adapter 90 has a horizontal first through hole 901. The bucket tooth 91 is mounted on the adapter 90. Both sides of the bucket tooth have respectively a second through hole 911 corresponding to the first through hole 901 of the adapter 90. A hammer 93 hits a pin 92 from the second through hole 911 on one side of the bucket tooth 91 into the first through hole 901. A C-shaped buckle 902 positions the pin 92 in the first through hole 901. Both ends of the pin 92 protrude from the second through holes 911, restricting and positioning the bucket tooth 91 on the adapter 90.

[0003] Please refer to FIGS. 9 and 10. After the adapter 90 and the bucket tooth 91 are assembled, there is still a gap A between them. There is also a gap between the second through holes 911 and the pin 92. Therefore, when the bucket tooth 91 urges against the adapter 90 during a digging process, the two ends of the pin 92 protruding from the first through hole 901 are not directly hit by the bucket tooth 91 because the gap B is larger than the gap A.

[0004] However, if there is a gap between the adapter 90 and the bucket tooth 91, it provides a buffer space for the bucket tooth 91 to hit back the adapter 90, which is likely to deform the colliding parts of them. Besides, the hitting strength is larger for a larger gap, causing more damages to the adapter 90 and the bucket tooth 91. Moreover, the second through holes 911 of the bucket tooth 91 erode with the pin 92 to become larger. As shown in FIG. 20, when the second through holes 911 of the bucket tooth 91 become larger and the gap A is larger than the gap B because of the constant collisions between the adapter 90 and the bucket tooth 91, the bucket tooth 91 urges against the pin 92, but not the adapter 90, during a digging process. Therefore, the pin 92 is constantly hit by the bucket tooth 91 during the digging process. The pin 92 thus often breaks so that the bucket tooth 91 falls off. In addition to causing troubles in digging, the bucket tooth 91 may even hurt somebody if it falls from a high place.

[0005] Since the conventional bucket teeth 9 are likely to break due to collisions during a digging process, it is an objective of the invention to solve the above-mentioned problems.

SUMMARY OF THE INVENTION

[0006] An objective of the invention is to solve the above-mentioned problems by providing a replacement and urging device for the bucket teeth of an engineering construction machine whose adapter and bucket teeth do not develop a shifting gap during uses. This prevents the pins from being hit by the tail and breaking.

[0007] To achieve the above-mentioned objectives, the invention includes:

[0008] an adapter, which has a fixing part fixed on a bucket, an inserting part protruding from the end of the fixing part that is far from the bucket, a first through hole being formed between its two sides and horizontally through the fixing part, a limiting part being disposed at the center of the first through hole;

[0009] a bucket tooth, which has a slot corresponding to the inserting part on its one end, and has a second through hole of both sides, respectively, each of the second through holes being disposed opposite to each other and in communications with the slot, the bucket tooth being mounted on the inserting part of the adapter by the slot;

[0010] an engaging unit, which is disposed between the first through hole of the adapter and the second through holes of the bucket tooth and slides between them for the bucket tooth to be mounted and positioned on the adapter.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] These and other features, aspects and advantages of the invention will become apparent by reference to the following description and accompanying drawings which are given by way of illustration only, and thus are not limitative of the invention, and wherein:

[0012] FIG. 1 is a three-dimensional schematic view of the disclosed bucket teeth;

[0013] FIG. 2 is a three-dimensional exploded view of the invention;

[0014] FIG. 3 shows the initial positioning of the disclosed bucket tooth;

[0015] FIG. 4 illustrates the collision of the disclosed bucket tooth during a digging process;

[0016] FIG. 5 is a schematic view of adjusting the stopping posts;

[0017] FIG. 6 is a schematic view of positioning the disclosed bucket tooth after the adjustment;

[0018] FIG. 7 is a cross-sectional view of the second embodiment of the invention;

[0019] FIG. 8 is a three-dimensional exploded view of a conventional bucket tooth;

[0020] FIG. 9 is a cross-sectional side view of the conventional bucket tooth;

[0021] FIG. 10 is a schematic view showing the gap between the base and the tail of the conventional bucket tooth; and

[0022] FIG. 11 shows that a pin in the conventional bucket tooth breaks due to collisions.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.

[0024] Please refer to FIGS. 1 to 7 for the structure of the invention. The first embodiment is a replacement and urging device for the bucket teeth of an engineering construction machine. It includes: an adapter 1, a bucket tooth 5, and an engaging unit 7.

[0025] The adapter 1 has a fixing part 11. As shown in FIGS. 1 and 2, the base 1 uses its fixing part 11 to hold onto the front edge of a bucket 2. The fixing part 11 is further soldered onto the bucket 2.

[0026] An inserting part 12 protrudes from one end of the fixing part 11 that is far from the bucket 2. A first through hole 121 is formed between its two sides, horizontally through the fixing part 11. A limiting part 122 is provided at the center of the first through hole 121.

[0027] One end of the bucket tooth 5 has a slot 51 corresponding to the inserting part 12. Both sides of the bucket tooth 5 have a second through hole 52, respectively. The second through holes 52 are disposed opposite to each other and in communications with the slot 51. The bucket tooth 5 is mounted on the inserting part 12 of the base 1 by the slot 51.

[0028] The engaging unit 7 is disposed between the first through hole 121 of the base 1 and the second through holes 52 of the bucket tooth 5 and can slide between them. It allows the bucket tooth 5 to mount and position on the adapter 1. In this embodiment, the engaging unit 7 includes two stopping posts 3 and an elastic element 4.

[0029] The stopping posts 3 are inserted into both ends of the first through hole 121 of the inserting part 12, respectively. One end of each of the stopping posts 3 protrudes from the first through hole 121 and correspondingly into the second through hole 52.

[0030] Each of the stopping posts 3 has a groove 32 on one end of inside the first through hole 121. Each of the grooves 32 is disposed to face each other. An elastic element 4 is interposed between the two grooves 32. Both ends of the elastic element 4 are inside the corresponding grooves 32 to urge against the stopping posts 3. The elastic element 4 in this embodiment is an urging spring. The elastic element 4A can be replaced by urethane with the same urging effect.

[0031] Besides, when each of the stopping posts 3 retracts into the first through hole 121, the limiting part 122 inside the first through hole stops so that the two stopping posts slide the same distance therein. The purpose of this is to average the urging force of the elastic element 4 on the two stopping posts 3. Moreover, each of the stopping posts 3 is mounted with at least one stopping ring 31 to prevent alien objects from entering the grooves 32 of the stopping ports 3 via the gap between the stopping posts 3 and the inserting part 12.

[0032] When the disclosed adapter 1 and the bucket tooth 5 are assembled, a holding tool (not shown) can be used to press the two stopping posts 3 into the first through hole 121 of the inserting part 12 of the adapter 1. The slot 51 of the bucket tooth 5 is mounted on the inserting part 12. The part of the stopping posts 3 next to the inner edge of the slot 51 of the bucket tooth 5 first urges against the inner front edge of the slot 51 of the bucket tooth 5. After releasing the holding tool 6, the slot 51 of the bucket tooth 5 is directly mounted onto the inserting part 12 of the adapter 1. In this case, the two stopping posts 3 correspond to the second through holes 52 on both sides of the bucket tooth 5. The elastic urging force of the elastic clement 4 pushes and goes into the corresponding second through holes 52, thereby positioning the bucket tooth 5 on the adapter 1. On the other hand, to take off the bucket tooth 5 from the adapter 1, one uses the holding tool 6 to first press the two stopping posts 3 into the first through holes 121 of the inserting part via the second through holes 52. Afterwards, the two stopping posts 3 inside the slot 51 urge against the inner edge of the slot 51 of the bucket tooth 5. After releasing the holding tool 6, one can readily remove the bucket tooth 5 from the adapter 1.

[0033] Besides, the bucket tooth 5 has an inner guiding angle 55 on the side that the second through holes 52 open towards the slot 51. The end of each of the stopping posts 3 protruding from the first through hole 121 has an outer guiding angle 33 towards the fixing part 11. The outer guiding angle 33 attaches the bucket tooth 5 to the inner guiding angle 55 of the second through hole 52. The depth of the outer guiding angle 33 is smaller than the inner guiding angle 55. This keeps a gap so that the adapter 1 and the bucket tooth 5 do not have collisions.

[0034] FIG. 3 shows that the outer guiding angle 33 of the two stopping posts 33 initially urges against the inner guiding angle 55 of the bucket tooth 5 when the bucket tooth 5 is mounted on the adapter 1. As shown in the drawing, the adapter 1 and the bucket tooth 5 are urged by the two stopping posts 3. Therefore, there is no sliding gap.

[0035] However, as shown in FIG. 4, when the bucket tooth 5 has collisions during a digging process, it retreats towards the adapter 1. In this case, the two stopping posts 3 extend outwards under the push of the elastic element 4, as shown in FIG. 5. The bucket tooth 5 uses its inner guiding angle 55 to urge against the outer guiding angle 33 of the stopping posts 3. The bucket tooth 5 is blocked so that there is still no sliding gap between the adapter I and the bucket tooth 5.

[0036] Besides, there is a flexible space 8 between the side of the stopping post 3 other than the outer guiding angle 33 and the inner wall of the second through hole 52 of the bucket tooth 5. The flexible space 8 prevent the bucket tooth 5 from directly hitting the stopping posts 3 during the digging process as the outer guiding angle 33 of the stopping posts 3 slide along the inner guiding angle 55 of the bucket tooth 5.

[0037] Therefore, when there are collisions between the adapter 1 and the bucket tooth 5 during the digging process, the two stopping posts 3 push outwards. The inner guiding angle 33 attaches to the outer guiding angle 53 to stop the bucket tooth 5. Therefore, there is no sliding gap between the bucket tooth 5 and the adapter 1. There is then no buffer space for the adapter 1 and the bucket tooth 5 to hit against each other. This prevents them from damages due to collisions. Also, using the design of the flexible space 8 between the bucket tooth 5 and the stopping posts 3, the bucket tooth 5 does not hit the stopping posts 3 and break them. Therefore, the disclosed bucket teeth have a very safe structure.

[0038] Please refer to FIG. 7 for a second embodiment of the invention. Each of the stopping posts 4 protrudes from one end of the first through hole 121. The other side of the outer guiding angle 33 has another corresponding outer guiding angle 33.

[0039] Although the invention has been described with reference to specific embodiment, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to people skilled in the art. Therefore, it is contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.

Claims

1. A replacement and urging device for the bucket teeth of an engineering construction machine, characterized in having:

an adapter (1), which has a fixing part (11) fixed to a bucket (2 ) and having an inserting part (12) protruding from the end far from the bucket (2), has a first through hole (121) formed between its two sides and horizontally going through the fixing part (11), and has a limiting part (122) at the center of the first through hole (121);

a bucket tooth (5), which has a slot (51) corresponding to the inserting part (12) on its one end and has a second through hole (52) on both sides thereof, each of the second through holes (52) being disposed opposite to each other and in communications with the slot (51) and the bucket tooth (5) being mounted on the inserting part (12) of the adapter (1) by its slot (51); and

an engaging unit (7), which is interposed and slides between the first through hole (121) of the adapter (1) and the second through holes (52) of the bucket tooth (5) so that the bucket tooth (5) is mounted and positioned on the adapter (1).

2. The replacement and urging device for the bucket teeth of an engineering construction machine as in claim 1 characterized in that the engaging unit includes two stopping posts (3) and an elastic element (4); each of the stopping posts (3) is inserted into both ends of the first through hole (121) of the inserting part (12), respectively; that one end of the stopping posts (3) protrudes from the first through hole (121) into the corresponding second through hole (52); that the bucket tooth (5) has an inner guiding angle (55) on the side that the second through holes (52) face the slot (51); that each of the stopping posts (3) has an outer guiding angle (33) on the end protruding from the first through hole (121) and facing towards the fixing part (11); that the outer guiding angle (33) attaches onto the inner guiding angle (55) of the second through holes (52) of the bucket tooth (5), that the depth of the outer guiding angle (33) is smaller than the inner guiding angle (55); and that a flexible space (8) is formed between the side of each of the stopping posts (3) other than the outer guiding angle (33) and the inner wall of the second through hole (52) of the bucket tooth (5).

3. The replacement and urging device for the bucket teeth of an engineering construction machine as in claim 2 characterized in that the end of the stopping posts (3) protruding from the first through hole (121) has another outer guiding angle (33) on the other side of the outer guiding angle (33).

4. The replacement and urging device for the bucket teeth of an engineering construction machine as in claim 2 characterized in that the elastic element (4) is an urging spring.

5. The replacement and urging device for the bucket teeth of an engineering construction machine as in claim 2 characterized in that the elastic element (4) is urethane.

6. The replacement and urging device for the bucket teeth of an engineering construction machine as in claim 2 characterized in that each of the stopping posts (3) is mounted with at least one stopping ring (31) around it to prevent alien objects from falling into the grooves (32) of the stopping posts (3) via the gap between the stopping posts (3) and the inserting part (12).

Drawing