Overload protection mechanism of traction machine

Abstract

The utility model discloses an overload protection mechanism of a traction machine, which comprises a mounting seat, a mounting frame of the traction machine is slidably mounted on the mounting seat, a force measuring spring is mounted between the mounting seat and the mounting frame of the traction machine, a limiting ratchet wheel is fixedly mounted at the shaft end of a traction roller of the traction machine, and a limiting ratchet disc is rotatably mounted on the mounting frame. A driving spring is fixedly installed between the limiting ratchet disc and the installation frame, a sliding hole is formed in the installation base, a safety pin is installed in the sliding hole in a sliding mode, the limiting ratchet disc is connected with a traction line, and the other end of the traction line is fixedly connected to the safety pin. According to the utility model, through the arrangement of the overload protection mechanism, when the pulling force for pulling a cable reaches a limit value, the stroke of the force measuring spring is compressed to enable the triggering groove to trigger the safety pin, so that the limiting ratchet disc is engaged with the limiting ratchet wheel to limit the rotation of the pulling roller, and the damage to the cable caused by larger pulling force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric power installation equipment relates to the overload protection mechanism of traction machine. BACKGROUND

[0002] Traction machine is a kind of equipment for pulling cable when installing cable, and current traction machine is various, including winch, traction machine and other forms.But different forms of traction machine are driven by driving mechanism to drive single or multiple traction rollers installed on mounting bracket to pull cable or rope.

[0003] Cable needs to bear larger tension in the process of traction, when tension exceeds the bearing limit of cable or traction rope, and traction machine is still running, it will cause damage or breakage, or other danger. INVENTION CONTENTS

[0004] In view of the above problems, the utility model provides the overload protection mechanism of traction machine, and the problems in the prior art are well solved.

[0005] In order to realize the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] An overload protection mechanism of traction machine, comprising:

[0007] Mounting seat, the mounting bracket of traction machine is slidably installed in the mounting seat;

[0008] Force spring, the force spring is fixedly installed between the mounting seat and the mounting bracket of traction machine;

[0009] Limiting ratchet, the limiting ratchet is fixedly installed at the traction roller shaft end of traction machine;

[0010] Limiting ratchet disc, the limiting ratchet disc is rotatably installed on the mounting bracket of traction machine, and the limiting ratchet disc is engaged with the limiting ratchet after rotation;

[0011] Driving spring, the driving spring is installed between the limiting ratchet disc and the mounting bracket of traction machine;

[0012] Safety pin, the mounting seat is provided with sliding hole, and the safety pin is slidably installed in the sliding hole;

[0013] Trigger groove, the trigger groove is formed in the mounting bracket of traction machine, one end of the safety pin is located in the trigger groove, the trigger groove is provided with trigger inclined surface, and the trigger inclined surface pushes the safety pin to separate from the sliding hole after the mounting bracket of traction machine slides;

[0014] Traction line, the traction line is fixedly connected to the limiting ratchet disc at first end, and is fixedly connected to the safety pin at second end.

[0015] Optionally, the mounting base is provided with a sliding rail, and the safety pin is mounted in the sliding rail and slides along the sliding rail after being separated from the sliding hole.

[0016] Optionally, the safety pin comprises a sliding block, a pin block is slidably mounted in the sliding block, a reset spring is arranged between the sliding block and the pin block, the pin block penetrates through the sliding hole and is located in the trigger groove, and the sliding block is slidably mounted in the sliding rail.

[0017] Optionally, a reset line is fixedly connected to one end of the sliding block away from the traction line, a winding wheel is fixedly connected to the reset line, the winding wheel is rotatably mounted in the mounting base, and the mounting base is mounted with a driving piece.

[0018] Optionally, an adjusting block is slidably mounted in the mounting base, the adjusting block is fixedly connected to one end of the tension spring away from the mounting frame of the traction machine, and the adjusting block is mounted with a fixing piece.

[0019] Optionally, the fixing piece comprises an adjusting screw threadedly connected to the mounting base, and the adjusting screw is abutted against the adjusting block at an end portion.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The mounting frame part of the traction machine is slidably arranged on the mounting base, when the traction cable is pulled, the mounting frame part is slid under the tension to compress the tension spring, the trigger slope in the trigger groove slides towards the safety pin, when the trigger groove slides to the position of the safety pin, the safety pin is pushed to separate from the sliding hole, the driving spring drives the traction line and the safety pin to slide, the limiting ratchet disc is rotated to engage with the limiting ratchet wheel, the rotation of the traction roller is limited, and when the traction cable reaches the limit value, the overload protection mechanism is arranged to avoid generating greater tension to damage the cable;

[0022] The sliding rail is arranged, the safety pin slides along the sliding rail after being separated from the sliding hole, and the danger caused by the free movement of the safety pin after being separated from the sliding hole is reduced;

[0023] The adjusting block and the fixing piece are arranged, the compression degree of the tension spring is adjusted, the traction force required for the mounting frame to slide to trigger the safety pin is adjusted, and different cables can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the overall structure schematic view of the embodiment of the utility model;

[0025] Figure 2 is the limiting ratchet wheel position structure schematic view of the embodiment of the utility model;

[0026] Figure 3 is Figure 1 is an enlarged schematic view of part A in figure 1.

[0027] Fig. 11 is a mounting frame; 12 is a traction roller; 2 is a mounting seat; 31 is a force spring; 32 is an adjusting block; 33 is a fixing piece; 331 is an adjusting screw; 41 is a limiting ratchet wheel; 42 is a limiting ratchet disc; 43 is a driving spring; 44 is a traction line; 511 is a sliding rail; 513 is a sliding block; 51 is a pin block; 514 is a reset line; 515 is a winding wheel; 516 is a driving piece; 52 is a trigger groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Please refer to Figures 1 to 3 The overload protection mechanism of the traction machine disclosed in the embodiments of the present application comprises a mounting seat 2, a mounting frame 11 of the traction machine is slidably mounted on the mounting seat 2, a force spring 31 is mounted between the mounting seat 2 and the mounting frame 11 of the traction machine, a limiting ratchet wheel 41 is fixedly installed at the shaft end of a traction roller 12 of the traction machine, a limiting ratchet disc 42 is rotatably mounted on the mounting frame 11, the limiting ratchet disc 42 is engaged with the limiting ratchet wheel 41 after being rotated, a driving spring 43 is fixedly installed between the limiting ratchet disc 42 and the mounting frame 11, the mounting seat 2 is provided with a sliding hole, a safety pin is slidably installed in the sliding hole, the mounting frame 11 is provided with a trigger groove 52, one end of the safety pin is located in the trigger groove 52, the trigger groove 52 is provided with a trigger inclined surface, the trigger inclined surface pushes the safety pin to slide out of the sliding hole after the mounting frame 11 slides, the limiting ratchet disc 42 is connected with a traction line 44, the other end of the traction line 44 is fixedly connected to the safety pin.

[0030] Specifically, the mounting frame 11 of the traction machine is slidably arranged on the mounting seat 2, when the traction cable is pulled, the mounting frame 11 is slid and compressed under the tension to compress the force spring 31, at the same time, the trigger inclined surface in the trigger groove 52 slides towards the safety pin, when the trigger groove 52 slides to the position of the safety pin, the safety pin is pushed to slide out of the sliding hole, the driving spring 43 drives the traction line 44 and the safety pin to slide, so that the limiting ratchet disc 42 is rotated to engage with the limiting ratchet wheel 41, thereby limiting the rotation of the traction roller 12.

[0031] In this way, by setting the overload protection mechanism, when the tension of the traction cable reaches the limit value, the compression load spring 31 is stretched to trigger the trigger groove 52 to trigger the safety pin, and then the limiting ratchet disc 42 engages the limiting ratchet wheel 41 to limit the rotation of the traction roller 12, thereby avoiding greater tension on the cable.

[0032] In some feasible ways, the mounting seat 2 is a rectangular seat, which can also be set to other shapes according to the shape of the mounting frame 11 of the traction machine. The bottom of the mounting frame 11 is fixedly provided with a T-shaped strip, and the upper end of the mounting seat 2 is fixedly provided with a T-shaped groove block. The T-shaped strip is slidably installed in the T-shaped groove block. The shaft end of the traction roller 12 penetrates the mounting frame 11 and is fixedly connected with the limiting ratchet wheel 41. The limiting ratchet disc 42 is in the shape of a semicircle and is provided with a ratchet on the inner side. One end of the limiting ratchet disc 42 is rotatably connected with the mounting frame 11, and the other end is fixedly connected with the driving spring 43. The driving spring 43 pulls the limiting ratchet disc 42 to engage the limiting ratchet wheel 41.

[0033] Please refer to Figure 3 The safety pin is in the shape of a rectangular column, and the side of the safety pin facing the trigger slope of the trigger groove 52 is provided with a slope. When the trigger slope continues to slide after contacting the slope, the safety pin is pushed to slide. After the safety pin slides out of the sliding hole, the traction line 44 is no longer limited, and the driving spring 43 pulls the limiting ratchet disc 42 to engage the limiting ratchet wheel 41.

[0034] As a specific embodiment of the overload protection mechanism of the traction machine provided in the application, the mounting seat 2 is provided with a sliding rail 511, and the safety pin is installed in the sliding rail 511. After the safety pin is separated from the sliding hole, it slides along the sliding rail 511.

[0035] Overall, by setting the sliding rail 511, the safety pin slides along the sliding rail 511 after being separated from the sliding hole, reducing the risk that the safety pin may freely move without being limited after being separated from the sliding hole.

[0036] Further, the safety pin includes a sliding block 513, the sliding block 513 is slidably provided with a pin block 51, and a return spring is arranged between the sliding block 513 and the pin block 51. The pin block 51 penetrates the sliding hole and is located in the trigger groove 52. The sliding block 513 is slidably installed in the sliding rail 511.

[0037] It should be understood that by setting the sliding block 513 and the return spring structure, the safety pin slides on both sides of the sliding rail 511 after being separated from the sliding hole, further standardizing the sliding path of the safety pin, and at the same time, when the safety pin is reset, the return spring drives the pin block 51 to reset, simplifying the resetting process.

[0038] Further, the sliding block 513 is fixedly connected with a reset line 514 away from one end of the traction line 44, the reset line 514 is fixedly connected with a winding wheel 515, the winding wheel 515 is rotatably installed on the mounting seat 2, and the mounting seat 2 is installed with a driving piece 516.

[0039] It should be understood that by setting the reset line 514 and the winding wheel 515, the reset of the sliding block 513 can be completed by winding the reset line 514 by the winding wheel 515.

[0040] In some feasible manners, the sliding rail 511 is a rectangular box body, the sliding hole is arranged on one side of the sliding rail 511, the sliding block 513 is a rectangular block, the sliding block 513 is fixedly connected with a sliding column, a through hole is arranged in the middle of the pin block 51, the through hole is slidably connected with the sliding column, and the reset spring is arranged outside the sliding column. The winding wheel 515 is an I-shaped wheel, and a hand wheel is arranged outside the winding wheel 515 as the driving piece 516, so as to be rotated.

[0041] As another specific embodiment of the overload protection mechanism of the traction machine provided by the application, the mounting seat 2 is slidably installed with an adjusting block 32, the force measuring spring 31 is fixedly connected with the adjusting block 32 away from one end of the mounting frame 11, and the adjusting block 32 is installed with a fixing piece 33.

[0042] Combined with a specific use scene, by setting the adjusting block 32 and the fixing piece 33, the compression degree of the force measuring spring 31 can be adjusted, so that the traction force required for the mounting frame 11 to slide to trigger the safety pin can be adjusted, and different cables can be adapted.

[0043] Further, the fixing piece 33 comprises an adjusting screw 331 which is screwed to the mounting seat 2, and the end of the adjusting screw 331 abuts against the adjusting block 32.

[0044] It should be understood that by setting the adjusting screw 331, the position of the adjusting block 32 can be adjusted.

[0045] In some feasible manners, the adjusting block 32 is a rectangular block, the bottom of the adjusting block 32 is provided with a T-shaped block, and the mounting seat 2 is provided with a T-shaped groove corresponding to the T-shaped block.

[0046] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An overload protection mechanism for a tractor, characterized in that, The utility model relates to a traction machine safety device, including: Mounting seat (2), the mounting frame of traction machine can be slidably installed in mounting seat (2), Force spring (31), the force spring (31) is fixedly installed between mounting seat (2) and the mounting frame of traction machine, Limiting ratchet (41), the limiting ratchet (41) is fixedly installed in traction roller axle end of traction machine, Limiting ratchet disc (42), the limiting ratchet disc (42) is rotatably installed in the mounting frame of traction machine, and the limiting ratchet disc (42) is engaged after rotating with limiting ratchet (41), Driving spring (43), the driving spring (43) is installed between the limiting ratchet disc (42) and the mounting frame of traction machine, Safety pin, the mounting seat (2) is provided with sliding hole, and the safety pin is slidably installed in sliding hole, Trigger groove (52), the trigger groove (52) is opened in the mounting frame of traction machine, one end of safety pin is located in trigger groove (52), and trigger groove (52) is provided with trigger inclined plane, and the trigger inclined plane pushes safety pin to separate from sliding hole after the mounting frame of traction machine slides, Traction line (44), the first end of traction line (44) is fixedly connected with limiting ratchet disc (42), and the second end is fixedly connected with safety pin.

2. The overload protection mechanism of a tractor as claimed in claim 1 wherein: The mounting seat (2) is provided with sliding rail (511), the safety pin is installed in sliding rail (511), and the safety pin slides along sliding rail (511) after separating from sliding hole.

3. The overload protection mechanism of a tractor as claimed in claim 2 wherein: The safety pin includes sliding block (513), the sliding block (513) is slidably installed with pin block (51), reset spring is arranged between sliding block (513) and pin block (51), pin block (51) penetrates sliding hole and is located in trigger groove (52), and sliding block (513) is slidably installed in sliding rail (511).

4. The overload protection mechanism of a tractor as claimed in claim 3 wherein: One end of sliding block (513) away from traction line (44) is fixedly connected with reset line (514), reset line (514) is fixedly connected with winding wheel (515), winding wheel (515) is rotatably installed in mounting seat (2), and mounting seat (2) is installed with driving part (516).

5. The overload protection mechanism of a tractor as claimed in claim 1 wherein: The mounting seat (2) is slidably installed with adjusting block (32), the one end of force spring (31) away from the mounting frame of traction machine is fixedly connected with adjusting block (32), and adjusting block (32) is installed with fixing part (33).

6. The overload protection mechanism of a tractor as claimed in claim 5 wherein: The fixing part (33) includes adjusting screw rod (331) that is screw connected with mounting seat (2), and the end of adjusting screw rod (331) abuts on adjusting block (32).

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