Linkage tightening allowance type crank

Abstract

The invention belongs to the technical field of electric power operation tools and instruments, and particularly relates to a linkage tightening allowance type crank which is characterized by comprising a handle, a right-angle frame, a connecting frame, a sliding sleeve, a drawing hollow shaft, a pressing nut, a pressure bearing seat, a bearing seat cover, a fork head lead screw and an eyebolt. One end of the drawing hollow shaft is hinged to one end of the right-angle frame through a bolt, the other end of the right-angle frame is connected with the handle, and the corner of the right-angle frame and one end of the sliding sleeve form a linkage hinged structure through a connecting frame. A bearing is arranged in the pressure bearing seat; and the other end of the drawing hollow shaft is connected with the screw rod end of the fork head screw rod. Compared with the prior art, the tool has the advantages that when an insulator is replaced, the handle is turned over by 90 degrees by pulling the handle once, the large section of a wire where the insulator is located can be tightened and shortened, then the wire is tightened by rotating the handle, the insulator can be rapidly replaced, and the operation efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power operation tools, and particularly relates to a linkage tightening margin type crank. Background Art

[0002] Currently, when replacing the strain insulator of a transmission line, it is usually necessary to transfer the tension first. When installing the tension transfer tool (such as a tightening screw rod, an insulating pull rod or an insulating pull plate, etc.), a certain gap needs to be reserved. Therefore, after installation, there is a stroke margin. During the process of tightening the stroke margin, the crank needs to be idled many times to tighten the margin and make the tool stressed, which consumes a relatively long time, wastes the physical strength of the operators, and affects the operation efficiency. Summary of the Invention

[0003] The purpose of the invention is to provide a linkage tightening margin type crank, which overcomes the deficiencies of the prior art. By turning the crank once, the margin of the wire can be shortened and eliminated, and then by continuing to turn the crank to tighten the wire, the rapid replacement of the insulator string can be completed. It is easy to use, saves the physical strength of the operators, shortens the operation time, and improves the operation efficiency.

[0004] To achieve the above purpose, the invention is realized through the following technical solutions:

[0005] The linkage tightening margin type crank includes a handle, a right-angle frame, a connecting frame, a sliding sleeve, a pull-out hollow shaft, a compression nut, a pressure bearing seat, a bearing seat cover, a fork head screw rod and a lifting eye bolt. The sliding sleeve is sleeved on the pull-out hollow shaft. One end of the pull-out hollow shaft is hinged to one end of the right-angle frame through a bolt. The other end of the right-angle frame is connected to the handle. The corner of the right-angle frame and one end of the sliding sleeve form a linkage hinge structure through the connecting frame; the other end of the sliding sleeve is connected to the pressure bearing seat through the compression nut and the bearing seat cover, and a bearing is arranged in the pressure bearing seat; the other end of the pull-out hollow shaft is connected to the screw rod end of the fork head screw rod, and the fork head end of the fork head screw rod is connected to the wire where the insulator string to be replaced is located through the lifting eye bolt.

[0006] Further, a non-slip coating is arranged on the surface of the pressure bearing seat facing the fork head screw rod.

[0007] Further, the bearing is a radial ball bearing or a radial roller bearing.

[0008] Further, the inner width of the fork head of the fork head screw rod is 30 mm - 40 mm.

[0009] Further, the connecting frame is a U-shaped clamp body structure and symmetrically clamps the outer sides of the sliding sleeve and the right-angle frame.

[0010] Further, the handle has two operating positions, horizontal and vertical, and the corresponding moving distance of the pull-out hollow shaft is 0 - 50 mm.

[0011] Further, the thread between the other end of the draw hollow shaft and the fork head screw rod is a single - start rectangular thread or a multi - start rectangular thread.

[0012] Further, the outer surface of the compression nut is provided with knurling for convenient operation; the hand - held part of the handgrip surface is also provided with knurling.

[0013] Further, the outer surface of the bearing seat is hexagonal, and the outer surface of the corresponding bearing seat cover is also hexagonal.

[0014] Further, when the device is in use, first turn the handgrip to the horizontal position, the fork head screw rod is in the extended position, top the front end of the pressure bearing seat to the opening of the mounting bracket, and connect the fork head at the front end of the fork head screw rod to the wire where the insulator string is located with a lifting eye bolt; then turn the handgrip to the vertical position, the wire is tightened, and then continue to tighten the wire by turning the crank to make the insulator string loose, and the rapid replacement of the insulator string can be completed.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) When replacing the insulator, by turning the handgrip once, the handgrip can be flipped 90 degrees, and a large section of the surplus of the wire connected to the insulator can be tightened and shortened. Then, by continuing to turn the handgrip to tighten the wire, the replacement of the insulator can be quickly completed, greatly improving the operation efficiency.

[0017] 2) The linkage structure is easy to use, saving the physical strength of the operators, significantly shortening the operation time, being beneficial to ensuring timely power supply, and meeting the common interests of power supply enterprises and users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the handgrip in a horizontal state in an embodiment of the present invention;

[0019] Figure 2 is Figure 1 the top view of

[0020] Figure 3 is Figure 1 the three - dimensional state diagram of

[0021] Figure 4 is a schematic structural diagram of the handgrip in a vertical state in an embodiment of the present invention;

[0022] In the figure: 1 - handgrip, 2 - right - angle frame, 3 - connecting frame, 4 - sliding sleeve, 5 - draw hollow shaft, 6 - compression nut, 7 - pressure bearing seat, 8 - bearing seat cover, 9 - fork head screw rod, 10 - lifting eye bolt, 11 - bolt, 12 - bearing. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments.

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the specific embodiments required for use in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other specific embodiments can be obtained based on these specific embodiments.

[0025] Generally, the components of the embodiments of the present invention described and shown in the specific embodiments here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the present invention claimed, but only represents the selected embodiments of the present invention.

[0026] See Figures 1-4 , which is a schematic structural diagram of an embodiment of a linkage tightening margin type crank of the present invention, including a hand grip 1, a right-angle frame 2, a connecting frame 3, a sliding sleeve 4, a pull-out hollow shaft 5, a compression nut 6, a pressure bearing seat 7, a bearing seat cover 8, a fork head screw rod 9, and a lifting eye bolt 10. The sliding sleeve 4 is sleeved on the pull-out hollow shaft 5. One end of the pull-out hollow shaft 5 is hinged to one end of the right-angle frame 2 through a bolt 11. The other end of the right-angle frame 2 is connected to the hand grip 1. The corner of the right-angle frame 2 and one end of the sliding sleeve 4 form a linkage hinge structure through the connecting frame 3. The other end of the sliding sleeve 4 is connected to the pressure bearing seat 7 through the compression nut 6 and the bearing seat cover 8. A bearing 12 is provided in the pressure bearing seat 7. The other end of the pull-out hollow shaft 5 is connected to the screw rod end of the fork head screw rod 9. The fork head end of the fork head screw rod 9 is connected to the wire of the insulator string to be replaced through the lifting eye bolt 10.

[0027] In the embodiment, in order to avoid slipping, an anti-slip coating is provided on the surface of the pressure bearing seat 7 facing the fork head screw rod 9. The bearing 12 can be a radial ball bearing or a radial roller bearing. Preferably, a radial roller bearing can better withstand pressure. The inner width of the fork head of the fork head screw rod 9 is 30 mm - 40 mm, which is applicable to wires of various specifications. The connecting frame 3 is a U-shaped clamp structure, symmetrically clamped on the outside of the sliding sleeve 4 and the right-angle frame 2. The symmetric structure has uniform stress and can avoid the bending problem of the fork head screw rod 9 under unilateral stress.

[0028] The hand grip 1 has two operating positions, horizontal and vertical, corresponding to a moving distance of 0 - 50 mm of the pull-out hollow shaft 5.

[0029] In order to increase the tightening force and avoid damage to the threads after being stressed, the thread between the other end of the draw hollow shaft 5 and the fork head screw rod 9 is a single-start square thread or a multi-start square thread. For the convenience of assembly operation, knurling for easy operation is provided on the outer surface of the compression nut 6; knurling is also provided on the hand-held part of the surface of the handgrip 1. The outer surface of the bearing seat is hexagonal, and correspondingly, the outer surface of the bearing seat cover 8 is also hexagonal, and assembly can be carried out with the aid of a wrench.

[0030] When the device of the present invention is in use, first turn the handgrip 1 to the horizontal position, with the fork head screw rod 9 in the extended position, and press the front end of the pressure bearing seat 7 against the opening of the mounting bracket. The fork head at the front end of the fork head screw rod 9 is connected to the conductor on the insulator string to be replaced with a lifting eye bolt 10; then turn the handgrip 1 to the vertical position, the fork head screw rod 9 is tightened, and then continue to tighten the conductor by turning the crank, and the replacement of the insulator string can be quickly completed.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Linkage tightening margin type crank, characterized in that, It includes a handle, a right-angle frame, a connecting frame, a sliding sleeve, a pull-out hollow shaft, a compression nut, a pressure bearing seat, a bearing seat cover, a fork head screw rod and a lifting eye bolt. The sliding sleeve is sleeved on the pull-out hollow shaft. One end of the pull-out hollow shaft is hinged to one end of the right-angle frame through a bolt. The other end of the right-angle frame is connected to the handle. The corner of the right-angle frame and one end of the sliding sleeve form a linkage hinge structure through the connecting frame. The other end of the sliding sleeve is connected to the pressure bearing seat through the compression nut and the bearing seat cover, and a bearing is arranged inside the pressure bearing seat. The other end of the pull-out hollow shaft is connected to the screw rod end of the fork head screw rod, and the fork head end of the fork head screw rod is connected to the wire where the insulator string to be replaced is located through the lifting eye bolt.

2. The linkage tightening margin type crank according to claim 1, wherein The surface of the pressure bearing seat facing the fork head screw rod is provided with an anti-slip coating.

3. The linkage tightening margin type crank according to claim 1, characterized in that, The bearing is a radial ball bearing or a radial roller bearing.

4. The linkage tightening margin type crank according to claim 1, characterized in that The inner width of the fork head of the fork head screw rod is 30 mm - 40 mm.

5. The linkage tightening margin type crank according to claim 1, characterized in that, The connecting frame is a U-shaped clamp structure and symmetrically clamps the outside of the sliding sleeve and the right-angle frame.

6. The linkage tightening margin type crank according to claim 1, characterized in that, The handle has two operating positions, horizontal and vertical, and the corresponding moving distance of the pull-out hollow shaft is 0 - 50 mm.

7. The linkage tightening margin type crank according to claim 1, characterized in that, The thread between the other end of the pull-out hollow shaft and the fork head screw rod is a single-start square thread or a multi-start square thread.

8. The linkage tightening margin type crank according to claim 1, wherein, The outer surface of the compression nut is provided with knurling for easy operation; the hand-held part of the handle surface is also provided with knurling.

9. The linkage tightening margin type crank according to claim 1, characterized in that, The outer surface of the bearing seat is hexagonal, and the outer surface of the corresponding bearing seat cover is also hexagonal.

10. The linkage tightening margin type crank according to claim 1, characterized in that, When the device is in use, first turn the handle to the horizontal position, the fork head screw rod is in the extended position, push the front end of the pressure bearing seat to the opening of the mounting bracket, and connect the fork head at the front end of the fork head screw rod to the wire where the insulator string is located through the lifting eye bolt; then turn the handle to the vertical position, the wire is tightened, and then continue to tighten the wire by turning the crank to make the insulator string loose, and the rapid replacement of the insulator string can be completed.

Images