Auxiliary overturning tool for splitting flat cotter pin

Abstract

The utility model discloses an auxiliary turning tool for splitting a flat split pin, which is characterized in that the flat split pin is inserted into a flat hole of a flat hole round pin, and the end of the turning tool fixes a support leg of the flat split pin; comprising a handle, an L-shaped supporting seat located at the top end of the handle, a flat hole round pin limiting groove located in the L-shaped supporting seat and a flat cotter pin fixing insertion rod located over the flat hole round pin limiting groove, the flat hole round pin limiting groove is used for sleeving the end of a flat hole round pin, and the flat cotter pin fixing insertion rod is used for being inserted into a through hole in the large end of the flat cotter pin. The flat cotter pin supporting leg overturning device has the advantages that operation is convenient and flexible, time and labor are saved in the installation process, the splitting efficiency is high, the overturning angle of the flat cotter pin supporting leg is standardized, and the operation process is standardized.

Description

Technical Field

[0001] The utility model belongs to the technical field of installation of flat hole round pins for railway freight cars, and in particular relates to an auxiliary turning tool for splitting a flat cotter pin. Background Art

[0002] The flat hole round pin connection structure is mainly composed of a flat hole round pin, a flat cotter pin and a washer, but its installation operation is not standardized. Usually, during the installation process, a crowbar is used to support the large head end of the flat cotter pin in the through hole, and then a hammer is used to knock the long and short legs of the flat cotter pin to open it. Because only the crowbar is used to support the flat cotter pin, and the flat hole round pin is not fixed, the crowbar can easily pry the flat cotter pin out of the flat hole, resulting in installation failure. If the working space is small, it is inconvenient for operators to operate using a crowbar. Utility Model Content

[0003] The utility model aims to provide an auxiliary flipping tool for splitting a flat cotter pin, which has high operating efficiency and eliminates potential safety hazards. It solves the problems of using a crowbar to support the through hole of the big head end of the flat cotter pin during the installation process, and then using a hammer to hit the long and short legs of the flat cotter pin to make it open, resulting in inconvenience for operators to operate, time-consuming and labor-intensive installation, low splitting efficiency, unguaranteed quality, and potential safety hazards.

[0004] To this end, the technical solution adopted by the utility model is: an auxiliary flipping tool for splitting a flat cotter pin, the flat cotter pin is inserted into the flat hole of a flat hole round pin, and the end of the flipping tool fixes the support leg of the flat cotter pin, including a handle, an "L"-shaped support seat at the top of the handle, a flat hole round pin limiting groove on the "L"-shaped support seat, and a flat cotter pin fixing rod directly above the flat hole round pin limiting groove, the flat hole round pin limiting groove is used to fit the end of the flat hole round pin, and the flat cotter pin fixing rod is used to insert into the through hole at the large end of the flat cotter pin, thereby fixing the relative position of the flat cotter pin and the flat hole round pin.

[0005] As a preferred embodiment of the above scheme, the flat hole round pin limiting groove as a whole is a circular groove structure that fits with the end of the flat hole round pin. The upper part of the flat hole round pin limiting groove extends horizontally to form an arc-shaped limiting baffle that matches the outer wall of the flat hole round pin. The arc-shaped limiting baffle is centrally provided with a notch that is parallel to the upper and lower corresponding flat cotter pin fixing rod, so as to avoid the flat cotter pin. When the flat cotter pin fixing rod is inserted into the through hole at the big head end of the flat cotter pin to fix the flat cotter pin, the big head end of the flat cotter pin will not have a position conflict with the arc-shaped limiting baffle, and the design structure is reasonable.

[0006] Further preferably, the flat cotter pin fixing rod is installed on the "L"-shaped support seat through a fastening nut, which is convenient and quick to install. The handle, "L"-shaped support seat, and flat hole round pin limiting groove are all connected by welding, and the welding is firm.

[0007] Further preferably, the handle adopts a hollow round tube, which effectively reduces weight and saves effort, and the top corners of the vertical plate of the "L"-shaped support seat are chamfered to effectively prevent the open car door from being scratched during use.

[0008] Further preferably, the flipping tool includes a crank flat-mouth sleeve, a long leg opening block installed at the top of the vertical round rod of the crank flat-mouth sleeve, and a short leg opening block installed at the bottom of the long leg opening block. The short leg opening block is provided with a limiting notch for the long leg of the flat cotter pin to extend into on one side close to the long leg opening block, so that the long leg of the flat cotter pin can be clamped to achieve a preliminary flipping opening. The structural design is ingenious. As long as the leg has a length difference, it can be stuck in the limiting notch to achieve the initial flipping opening of the flat cotter pin.

[0009] Further preferably, the lower end of the crank flat-mouth sleeve is bent to form an obtuse-angle "L"-shaped structure, and the bottom end of the bent section of the crank flat-mouth sleeve is provided with an elliptical flat mouth for inserting the supporting legs after the opening, so that the supporting legs can be respectively covered and flipped outward to fit the outer wall of the flat hole round pin. The design structure is reasonable and the operation is simple and flexible, which can meet the requirements of completely splitting the flat cotter pin and effectively prevent the supporting legs from extending outward to affect the rotation of the flat hole round pin.

[0010] The beneficial effects of the utility model are as follows: compared to using a crowbar to support the through hole at the large head end of the flat cotter pin during the installation process, and then using a hammer to knock the long and short legs of the flat cotter pin to make it open, this solution uses an auxiliary flipping tool to fix the relative position of the flat cotter pin and the flat hole round pin, the flat hole round pin limiting groove fixes the end of the flat hole round pin, and the flat cotter pin fixing rod fixes the flat cotter pin. The design structure is interlocking, and the operation is convenient and flexible. The installation process saves time and effort, the splitting efficiency is high, and the risk of the flat cotter pin detaching from the flat hole round pin is effectively avoided. It has the advantages of convenient and flexible operation, saving time and effort during the installation process, high splitting efficiency, standardized flipping angles of the flat cotter pin legs, and standardized operating procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a schematic diagram of the use of the utility model.

[0013] Figure 3 A schematic diagram of the structure of the flip tool.

[0014] Figure 4 This is a schematic diagram of the use of the long leg that clamps the flat cotter pin at the top of the flip tool.

[0015] Figure 5 Schematic diagram of the use of the flat cotter pin leg on the bottom end of the flip tool.

[0016] Figure 6 This is a schematic diagram of the structure after the flat cotter pin is installed. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0018] Combination Figure 1 — Figure 6 As shown, an auxiliary flipping tool for splitting a flat cotter pin is shown, the flat cotter pin 4 is inserted into the flat hole of the flat hole round pin 3, and the end of the flipping tool 6 fixes the support leg 41 of the flat cotter pin 4. The auxiliary flipping tool consists of a handle 51, an "L"-shaped support seat 52 at the top of the handle 51, a flat hole round pin limiting groove 53 located on the "L"-shaped support seat 52, and a flat cotter pin fixing rod 54 located directly above the flat hole round pin limiting groove 53.

[0019] The flat hole round pin limiting groove 53 is used to fit the end of the flat hole round pin 3.

[0020] The flat cotter pin fixing rod 54 is used to be inserted into the through hole at the large end of the flat cotter pin 4 , so as to fix the relative position of the flat cotter pin 4 and the flat hole round pin 3 .

[0021] The flat hole round pin limiting groove 53 is a circular groove structure that fits with the end of the flat hole round pin 3 as a whole.

[0022] The upper portion of the flat hole round pin limiting groove 53 extends horizontally to form an arc-shaped limiting baffle 531 matching the outer wall of the flat hole round pin 3 .

[0023] The arc-shaped limiting baffle 531 is centrally provided with a notch which is parallel to the upper and lower sides of the flat cotter pin fixing rod 54 , so as to avoid the flat cotter pin 4 .

[0024] The flat split pin fixing rod 54 is installed on the "L"-shaped support seat 52 through a fastening nut.

[0025] The handle 51, the "L"-shaped support seat 52, and the flat hole round pin limiting groove 53 are all connected by welding.

[0026] The handle 51 is a hollow circular tube.

[0027] The top corners of the vertical plates of the "L"-shaped support seat 52 are all chamfered.

[0028] First, insert the flat cotter pin 4 into the flat hole of the flat hole round pin 3 to prevent the flat hole round pin 3 from moving and falling off;

[0029] Then, the auxiliary turning tool 5 is used to fix the relative positions of the flat cotter pin 4 and the flat hole round pin 3;

[0030] Then, the top of the turning tool 6 is used to clamp the long leg 41 of the flat cotter pin 4 and cooperate with the auxiliary turning tool 5 to reversely turn the cotter pin for the first time to complete the opening;

[0031] The turning tool 6 is composed of a crank flat-mouth sleeve 61 , a leg opening long block 62 installed at the top of the vertical round rod of the crank flat-mouth sleeve 61 , and a leg opening short block 63 installed at the bottom of the leg opening long block 62 .

[0032] A limiting notch 631 is provided on one side of the leg opening short block 63 close to the leg opening long block 62 for the long leg 41 of the flat cotter pin 4 to extend into, so that the long leg 41 of the flat cotter pin 4 can be clamped to achieve a preliminary flip opening.

[0033] The lower end of the crank flat sleeve 61 is bent to form an obtuse-angle "L"-shaped structure.

[0034] The bottom end of the bent section of the crank flat-mouth sleeve 61 is provided with an elliptical flat mouth 611 for the opened support leg 41 to be inserted into, so that the support leg 41 can be respectively covered and turned outward to fit the outer wall of the flat hole round pin 3.

[0035] Finally, the bottom end of the flipping tool 6 is used to sequentially cover the two legs 41 of different lengths of the flat cotter pin 4, and the auxiliary flipping tool 5 is used to exert reverse force to fold the legs 41 outwards to fit the outer wall of the flat hole round pin 3.

Claims

1. An auxiliary turning tool for splitting a flat cotter pin, wherein the flat cotter pin (4) is inserted into the flat hole of a flat hole round pin (3), and the end of the turning tool (6) fixes the support leg (41) of the flat cotter pin (4), characterized in that: The invention comprises a handle (51), an "L"-shaped support seat (52) located at the top of the handle (51), a flat hole round pin limiting groove (53) located on the "L"-shaped support seat (52), and a flat cotter pin fixing insertion rod (54) located directly above the flat hole round pin limiting groove (53), wherein the flat hole round pin limiting groove (53) is used to fit the end of the flat hole round pin (3), and the flat cotter pin fixing insertion rod (54) is used to be inserted into the through hole at the large end of the flat cotter pin (4), thereby fixing the relative position of the flat cotter pin (4) and the flat hole round pin (3).

2. The auxiliary turning tool for splitting a flat cotter pin according to claim 1, characterized in that: The flat hole round pin limiting groove (53) is in the form of a circular groove structure that fits with the end of the flat hole round pin (3). The upper part of the flat hole round pin limiting groove (53) extends horizontally to form an arc-shaped limiting baffle (531) that matches the outer wall of the flat hole round pin (3). The arc-shaped limiting baffle (531) is centrally provided with a notch that corresponds to the upper and lower parallel flat cotter pin fixing rod (54) so ​​as to avoid the flat cotter pin (4).

3. The auxiliary turning tool for splitting a flat cotter pin according to claim 1, characterized in that: The flat split pin fixing rod (54) is mounted on the "L"-shaped support seat (52) via a fastening nut, and the handle (51), the "L"-shaped support seat (52) and the flat hole round pin limiting groove (53) are all connected by welding.

4. The auxiliary turning tool for splitting a flat cotter pin according to claim 1, characterized in that: The handle (51) is a hollow circular tube, and the top corners of the vertical plate of the "L"-shaped support seat (52) are all chamfered.

5. The auxiliary turning tool for splitting a flat cotter pin according to claim 1, characterized in that: The flipping tool (6) comprises a crank flat-mouth sleeve (61), a long leg opening block (62) mounted on the top of a vertical round rod of the crank flat-mouth sleeve (61), and a short leg opening block (63) mounted at the bottom of the long leg opening block (62). The short leg opening block (63) is provided with a limiting notch (631) for the long leg (41) of the flat cotter pin (4) to extend into on one side of the short leg opening block (63) close to the long leg opening block (62), so that the long leg (41) of the flat cotter pin (4) can be clamped to achieve a preliminary flipping opening.

6. The auxiliary turning tool for splitting a flat cotter pin according to claim 5, characterized in that: The lower end of the crank flat-mouth sleeve (61) is bent to form an obtuse "L"-shaped structure, and the bottom end of the bent section of the crank flat-mouth sleeve (61) is provided with an elliptical flat mouth (611) for inserting the opened support leg (41), so that the support leg (41) can be respectively covered and turned outward to fit the outer wall of the flat hole round pin (3).

Images