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(11) | EP 3 093 402 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
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| (54) | ELECTRIC DREDGER |
| (57) An electric dredger includes a shaft rod and a helical reeling piece. The shaft rod
has a shaft sleeve made of micro-soft iron connected to the first end thereof. The
helical reeling piece is connected to a central shaft hole of the shaft sleeve. An
external end surface of the shaft sleeve is provided with an inclined surface. A connecting
rod is connected to a second end of the shaft rod and connected to an electric drilling
tool. |
BACKGROUND OF THE INVENTION
1. Fields of the invention
[0001] The present invention relates to an electric dredger for removing obstructions clogged in pipes such as toilet pipes, sink pipes and drain pipes.
2. Descriptions of Related Art
[0002] The conventional dredgers are manually operated to rotate within the clogged pipes so as to remove the clogged hairs and other objects in the pipe. However, it takes time and has to operate it with a lot of force. The conventional dredgers usually assembled by way of welding or threading, the parts may be loosened or separated from each other. The conventional dredgers need to be improved.
[0003] The present invention intends to provide an electric dredger to eliminate the shortcomings mentioned above.
SUMMARY OF THE INVENTION
[0004] The present invention relates to an electric dredger and comprises a shaft rod and a helical reeling piece. The shaft rod has a shaft sleeve connected to the first end thereof. The shaft sleeve is made of micro-soft iron and has a central shaft hole defined in the distal end thereof. The helical reeling piece has its first end connected to the central shaft hole of the shaft sleeve. The external end surface of the shaft sleeve has two V-shaped and spaced inclined surfaces. When assembling, the helical reeling piece has its first end inserted into the central shaft hole of the shaft sleeve, and the shaft sleeve is pressed externally and deformed to secure the helical reeling piece in the central shaft hole of the shaft sleeve. The shaft rod has a connecting rod connected to the second end thereof, and the connecting rod is connected to and driven by an electric drilling tool. The helical reeling piece is made by helically wound flexible metal wire so as to form a hollow piece. The second end of the helical reeling piece has an operation end connected thereto. The operation end cleans obstructions in a pipe. The helical reeling piece is connected to the shaft rod by way of pressing which improves the shortcomings of welding and threading.
[0005] The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006]
Fig. 1 is a perspective view to show the electric dredger of the present invention;
Fig. 2 is a cross sectional view to show the helical reeling piece is to be connected to the central shaft hole of the shaft sleeve;
Fig. 3 is a cross sectional view to show that the helical reeling piece is inserted into the central shaft hole of the shaft sleeve, and the shaft sleeve is to be pressed to secure the helical reeling piece, and
Fig. 4 is a cross sectional view to show that the helical reeling piece secure in the shaft sleeve after the shaft sleeve is pressed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0007] Referring to Figs. 1 and 4, the electric dredger of the present invention comprises a shaft rod 10 and a helical reeling piece 20. The shaft rod 10 has a shaft sleeve 11 connected to the first end thereof. The shaft sleeve 11 is made of micro-soft iron which is deformed when external pressure is applied thereto. A central shaft hole 12 is defined in the distal end of the shaft sleeve 11, and the helical reeling piece 20 has the first end thereof connected to the central shaft hole 12 of the shaft sleeve 11. The external end surface of the shaft sleeve 11 has two V-shaped spaced inclined surfaces 13 which prevent the shaft sleeve 11 being broken when being pressed. The shaft rod 10 has a connecting rod 14 connected to the second end thereof. The connecting rod 14 is to be connected to and driven by an electric drilling tool which rotates the shaft rod 10. The shaft rod 10 includes a through hole 15 defied radially therethrough. A pin 16 extends through the through hole 15 and is connected with a clip 17. The helical reeling piece 20 is removably connected with the clip 17 to reduce the space occupied by the helical reeling piece 20.
[0008] The helical reeling piece 20 is made by helically wound flexible metal wire so as to form a hollow piece. The first end of the helical reeling piece 20 is connected to the central shaft hole 12 of the shaft sleeve 11, and the second end of the helical reeling piece 20 has an operation end 21 connected thereto. The operation end 21 is a helical end and used to clean obstructions in a pipe.
[0009] When assembling, as shown in Figs. 2, 3 and 4, the first end of the helical reeling piece 20 is inserted into the central shaft hole12 of the shaft sleeve 11, and the shaft sleeve 11 is pressed externally to deform the shaft sleeve 11 to secure the helical reeling piece 20 in the central shaft hole12.
a shaft rod and a helical reeling piece, the shaft rod having a shaft sleeve connected to a first end thereof, the shaft sleeve made of micro-soft iron and having a central shaft hole defined in a distal end thereof, the helical reeling piece having a first end thereof connected to the central shaft hole of the shaft sleeve, an external end surface of the shaft sleeve having multiple spaced inclined surfaces, and
the helical reeling piece being made by helically wound flexible metal wire so as to form a hollow piece, a second end of the helical reeling piece having an operation end connected thereto, the operation end adapted to clean obstructions in a pipe.