Elastic positioning pin disassembly mechanism

Abstract

The utility model discloses an elastic positioning pin disassembly mechanism, which includes: a connecting rod and a puller; the puller includes a connecting portion and one or more pulling sheets, the one or more pulling sheets are connected to the upper end surface of the connecting portion, and a slot is provided between any two pulling sheets, and the cross-sectional area of ​​the slot gradually increases from the root of the pulling sheet to the head of the pulling sheet; the connecting rod is inserted in the puller, and within a preset range, the length of the connecting rod inserted in the puller is negatively correlated with the angle formed by any of the pulling sheets and the connecting portion. The utility model provides a puller and a connecting rod, and the connecting rod is inserted into the puller, so as to enhance the friction between the puller and the elastic positioning pin to be disassembled, and facilitate the rotation of the puller to drive the elastic positioning pin to rotate and disengage from the designated hole.

Description

Technical Field

[0001] The utility model relates to the field of mechanical disassembly and assembly tools, in particular to an elastic positioning pin disassembly mechanism. Background Art

[0002] The application of elastic locating pins is very extensive. Usually, the locating pins and the positioned parts are connected by transition fit. In the process of structural assembly, positioning tooling and multiple elastic locating pins are usually used to complete the positioning assembly of parts.

[0003] The existing method is to use a tool to knock the positioning pin to loosen the connection between the positioning pin and the positioning hole, and then knock the head of the positioning pin continuously to gradually withdraw the positioning pin under the impact force. This method of removing the positioning pin will damage the positioning pin, and due to long-term use, some positioning pins are engaged with the positioning hole and are difficult to remove. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art. The utility model provides an elastic positioning pin disassembly mechanism. By setting a puller and a connecting rod, the connecting rod is inserted into the puller to enhance the friction between the puller and the elastic positioning pin to be disassembled, so that the puller is conveniently rotated to drive the elastic positioning pin to rotate and disengage from the specified hole position.

[0005] Accordingly, the utility model provides an elastic positioning pin disassembly mechanism, the elastic positioning pin disassembly mechanism comprising: a connecting rod and a puller;

[0006] The puller comprises a connecting portion and one or more pulling sheets, wherein the one or more pulling sheets are connected to the upper end surface of the connecting portion, and a groove is provided between any two pulling sheets, and the cross-sectional area of ​​the groove gradually increases from the root of the pulling sheet to the head of the pulling sheet;

[0007] The connecting rod is inserted in the puller, and within a preset range, the length of the connecting rod inserted in the puller is negatively correlated with the angle formed by any one of the pulling pieces and the connecting portion.

[0008] Preferably, more than one pulling sheet is distributed on the end surface of the connecting portion and surrounds to form an insertion channel, and the diameter of the insertion channel is D1.

[0009] Preferably, a connecting hole is provided in the connecting portion, the diameter of the connecting hole is D2, and the constraint relationship between the connecting hole diameter D2 and the insertion channel diameter is: D2>D1.

[0010] Preferably, the end of the connecting rod is a cone, and the connecting rod is interference fit with the insertion channel, and the connecting rod is clearance fit with the connecting hole.

[0011] Preferably, the elastic positioning pin disassembly mechanism also includes a hammer, the end of the hammer is connected to the connecting rod, and a clamping hole is arranged on the head end of the hammer.

[0012] Preferably, a rotating rod is provided in the clamping hole, and the hammer is driven by the rotating rod to rotate around the axis of the rotating rod.

[0013] Preferably, a limit block is provided in the middle area of ​​the connecting rod.

[0014] Preferably, a first connecting portion is disposed above the limiting block, and a second connecting portion is disposed below the limiting block.

[0015] Preferably, the head of any of the pulling sheets extends outward to form a boss.

[0016] Preferably, the puller is made of metal, and a black protective layer is provided on the surface of the puller.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a connecting rod and a pulling sheet. When the connecting rod enters the insertion channel, it abuts against the pulling sheet. The connecting rod adjusts the tilting degree of the pulling sheet so that the diameter of the insertion channel formed by the pulling sheet expands to be equal to the inner hole diameter of the elastic locating pin, thereby improving the friction between the puller and the elastic locating pin to be disassembled, which is conducive to disassembling the elastic locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the elastic positioning pin disassembly mechanism in the utility model;

[0021] Figure 2 It is a structural schematic diagram of the puller in the utility model;

[0022] Figure 3 It is a front view of the puller in the utility model;

[0023] Figure 4 It is a sectional view of the puller in the utility model.

[0024] In the accompanying drawings, 1, connecting rod; 11, limiting block; 2, puller; 21, connecting part; 211, connecting hole; 22, pulling sheet; 221, boss; 23, insertion channel; 24, slot; 3, hammer; 31, snap-on hole; 32, rotating rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Figure 1 The schematic diagram of the structure of the elastic positioning pin disassembly mechanism in the utility model is shown. Figure 2 It is a structural schematic diagram of the puller in the utility model. Figure 3 It is a front view of the puller in the utility model. Figure 4 It is a cross-sectional view of the puller in the utility model. The elastic positioning pin disassembly mechanism comprises: a connecting rod 1 and a puller 2. One end of the connecting rod 1 is connected to the puller 2, and the connecting rod 1 is located above the puller 2.

[0027] The puller 2 includes a connecting portion 21 and one or more drawing sheets 22, and the one or more drawing sheets 22 are connected to the upper end surface of the connecting portion 21. In this embodiment, the puller 2 includes three drawing sheets 22, and a slot 24 is provided between any two of the drawing sheets 22. The slot 24 gradually increases from the root of the drawing sheet 22 to the head of the drawing sheet 22. The slot 24 reduces the connection between two adjacent drawing sheets, thereby reducing the tension between the drawing sheets 22, which is conducive to the lifting of the drawing sheets 22 and the expansion of their diameter. The connecting rod 1 is inserted into the puller 2, and within a preset range, the length of the connecting rod 1 inserted into the puller 2 is negatively correlated with the angle formed by any of the drawing sheets 22 and the connecting portion 21. The specific range of the preset range is 170° to 180°, that is, when the angle formed by the connecting portion 21 and the pulling piece 22 is within the range of 170° to 180°, the longer the length of the connecting rod 1 inserted in the puller 2, the smaller the angle formed by the pulling piece 22 and the connecting portion 21, and the higher the tilting angle of the pulling piece 22. When the angle formed by the pulling piece 22 and the connecting portion 21 is 170°, the connecting rod 1 continues to be inserted into the puller 2, and the angle between the pulling piece 22 and the connecting portion 21 does not change, and the angle between the pulling piece 22 and the connecting portion 21 continues to be maintained at 170°. The connecting portion 21 is used to connect with the connecting rod 1, and the pulling piece 22 is used to abut against the inner wall of the elastic positioning pin that needs to be disassembled, thereby increasing the friction between the puller 2 and the elastic positioning pin.

[0028] It should be noted that the puller 2 can be replaced according to actual conditions and can be equipped with pullers 2 having different numbers of pulling blades 22 to meet the needs of users.

[0029] Furthermore, more than one pulling piece 22 is distributed on the end surface of the connecting portion 21 and surrounds to form an insertion channel 23, and the diameter of the insertion channel 23 is D1, and the insertion channel 23 is connected to the outside based on the slot 24. The insertion channel 23 is used to insert the connecting rod 1, so that the connecting rod 1 can move in the insertion channel 23, thereby changing the angle formed by the pulling piece 22 and the connecting portion 21. When the connecting rod 1 moves to a certain length in the insertion channel 23, any one of the pulling sheets 22 is tilted away from the insertion channel 23 until it abuts against the inner wall of the elastic locating pin to be removed. At this time, one side of the pulling sheet 22 abuts against the inner wall of the elastic locating pin to be removed, and the other side of the pulling sheet 22 abuts against the outer surface of the connecting rod 1, so that the diameter of the insertion channel 23 formed by the pulling sheet 22 expands to be equal to the inner hole diameter of the elastic locating pin, thereby increasing the friction between the puller 2 and the elastic locating pin to be removed, which is beneficial to the removal of the elastic locating pin.

[0030] Furthermore, a connecting hole 211 is provided in the connecting portion 21, and the diameter of the connecting hole 211 is D2. The constraint relationship between the diameter D2 of the connecting hole 211 and the diameter D1 of the insertion channel 23 is: D2>D1. The connecting hole 211 is used to connect the connecting rod 1, and an internal thread is provided in the connecting hole 211. The diameter of the connecting hole 211 is slightly larger than the diameter of the insertion channel 23, and the diameter of the connecting rod 1 is slightly larger than the diameter of the insertion channel 23, and the diameter of the connecting rod 1 is slightly smaller than the diameter of the connecting hole 211, so that the connecting rod 1 can move in the insertion channel 23 while being tightly connected with the connecting hole 211, and the connecting rod 1 abuts against the pulling sheet 22 when entering the insertion channel 23, which is conducive to using the connecting rod 1 to adjust the tilting degree of the pulling sheet 22, and is conducive to the expansion of the diameter of the insertion channel 23 formed by the pulling sheet 22 to be equal to the inner hole diameter of the elastic positioning pin.

[0031] Furthermore, the end of the connecting rod 1 is a cone, and the connecting rod 1 is interference fit with the insertion channel 23, and the connecting rod 1 is clearance fit with the connecting hole 211. The end of the connecting rod 1 is a cone, which helps the end of the connecting rod 1 to move from the connecting hole 211 to the insertion channel 23. Since the diameter of the insertion channel 23 is smaller than the diameter of the connecting hole 211, when the end of the connecting rod 1 moves from the connecting hole 211 to the insertion channel 23, the insertion channel 23 will abut against the conical surface on the end of the connecting rod 1, and the connecting rod 1 enters the insertion channel 23 along the conical surface, ensuring that the connecting rod 1 can smoothly enter the insertion channel 23 from the connecting hole 211.

[0032] Furthermore, the elastic positioning pin disassembly mechanism also includes a hammer 3, the end of which is connected to the connecting rod 1, and a clamping hole 31 is provided on the head end of the hammer 3. The hammer 3 is used to drive the puller 2 to rotate and then drive the elastic positioning pin to be disassembled from the specified position, and the hammer 3 is a pedal hammer, that is, the foot is used preferentially during use to avoid using both hands to drive the hammer 3 to rotate. Using the foot to act on the hammer 3 is conducive to applying the weight of the whole body to the hammer 3, so that the hammer 3 rotates to drive the connecting rod 1 to rotate, and then drives the elastic positioning pin to rotate, which is convenient for the user to disassemble the elastic positioning pin. The use of a pedal hammer can effectively reduce the upward operation under the vehicle in the vehicle state, and reduce the risk of safety accidents caused by high labor intensity.

[0033] Furthermore, a rotating rod 32 is provided in the engaging hole 31, and the hammer 3 is driven by the rotating rod 32 to rotate about the axis of the rotating rod. Limiting balls are provided at both ends of the rotating rod 32, and the diameter of the limiting balls is larger than the diameter of the engaging hole 31. The limiting balls can limit the rotating rod 32 from being disengaged from the engaging hole 31, thereby ensuring that the rotating rod 32 is always located in the engaging hole 31. When the rotating rod 32 needs to be rotated, the rotating rod 32 can be pushed in one direction so that the limiting balls abut against the engaging hole 31, thereby limiting the rotating rod 32 from continuing to move in this direction, so that the rotating rod 32 and the hammer 3 form a lever. By using the principle of lever, the hammer 3 can be driven to rotate with a relatively small force, so that the hammer 3 drives the connecting rod 1 to rotate, thereby driving the elastic positioning pin to rotate, so that the user can remove the elastic positioning pin conveniently.

[0034] Furthermore, a limit block 11 is provided in the middle area of ​​the connecting rod 1. The limit block 11 is used to limit the moving range of the hammer 3, and the limit block 11 also limits the length of the connecting rod 1 inserted into the puller 2. When the hammer 3, the connecting rod 1 and the puller 2 are assembled into an elastic locating pin disassembly mechanism, the hammer 3 is installed above the limit block 11, and the puller 2 is installed below the limit block 11. After the hammer 3 is installed above the limit block 11, the hammer 3 continues to be rotated, thereby pushing the connecting rod 1 to move in the insertion channel 23 in the puller 2, so that the pulling piece 22 is tilted. Secondly, the limit block 11 is a hexagonal prism, and the hexagonal prism can help the user use other tools to clamp the connecting rod 1, and exert force from the connecting rod 1 and the hammer 3 at the same time to increase the convenience of disassembling the elastic locating pin.

[0035] Furthermore, a first connection portion 21 is provided above the limit block 11, and a second connection portion 21 is provided below the limit block 11. The first connection portion 21 is a first external thread, and the second connection portion 21 is a second external thread. The connecting rod 1 is connected to the first internal thread of the hammer 3 based on the first external thread, and the connecting rod 1 is connected to the second internal thread of the puller 2 based on the second external thread. The connecting rod 1 is connected by mutual engagement between the threads, can withstand large tensile and shear forces, is not easy to loosen, and has good seismic resistance.

[0036] Furthermore, the head of any of the pull-out tabs 22 extends outward to form a boss 221, and the boss 221 is used to increase the friction between the pull-out tab 22 and the elastic positioning pin. As the connecting rod 1 moves in the insertion channel 23, the pull-out tab 22 is squeezed by the connecting rod 1 and tilts up, and while the pull-out tab 22 tilts up, it abuts against the inside of the elastic positioning pin, that is, the pull-out tab 22 is squeezed by both sides at the same time, so that the friction between the pull-out tab 22 and the elastic positioning pin is increased, thereby reducing the difficulty of the positioning pin removal device to remove the elastic positioning pin.

[0037] Furthermore, the puller 2 is made of metal, and a black protective layer is provided on the surface of the puller 2. In the present embodiment, the puller 2 is made of alloy structural steel (35GrMo), which has excellent physical and mechanical properties. The alloy structural steel has high toughness. Under high impact loads, the puller 2 can absorb more energy and is not easy to break, thereby improving the safety and reliability of the structure; secondly, it also has high yield strength, so that it can maintain good shape and dimensional stability when impacted, and is not easy to plastically deform, that is, the puller 2 is not easy to deform when rotating, and can effectively drive the elastic locating pin that needs to be disassembled to rotate. The black protective layer provided on the surface of the puller 2 is processed by high-temperature tempering and blackening, so that the puller 2 is not easy to deform and wear, thereby extending the service life of the puller 2.

[0038] To summarize, the utility model provides a connecting rod and a pulling sheet. When the connecting rod enters the insertion channel, it abuts against the pulling sheet. The connecting rod adjusts the tilting degree of the pulling sheet so that the diameter of the insertion channel formed by the pulling sheet expands to be equal to the inner hole diameter of the elastic locating pin, thereby increasing the friction between the puller and the elastic locating pin to be removed, which is beneficial to the removal of the elastic locating pin.

[0039] In addition, the above is a detailed introduction to an elastic positioning pin disassembly device provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An elastic positioning pin disassembly mechanism, characterized in that: The elastic positioning pin disassembly mechanism comprises: a connecting rod and a puller; The puller comprises a connecting portion and one or more pulling sheets, wherein the one or more pulling sheets are connected to the upper end surface of the connecting portion, and a groove is provided between any two pulling sheets, and the cross-sectional area of ​​the groove gradually increases from the root of the pulling sheet to the head of the pulling sheet; The connecting rod is inserted in the puller, and within a preset range, the length of the connecting rod inserted in the puller is negatively correlated with the angle formed by any one of the pulling pieces and the connecting portion.

2. The elastic positioning pin disassembly mechanism according to claim 1, characterized in that: More than one pulling sheet is distributed on the end surface of the connecting portion and surrounds to form an insertion channel, and the diameter of the insertion channel is D1.

3. The elastic positioning pin disassembly mechanism according to claim 2, characterized in that: A connecting hole is provided in the connecting portion, and the diameter of the connecting hole is D2. The constraint relationship between the connecting hole diameter D2 and the insertion channel diameter is: D2>D1.

4. The elastic positioning pin disassembly mechanism according to claim 3, characterized in that: The end of the connecting rod is in a cone shape, and the connecting rod is interference-fitted with the insertion channel, and the connecting rod is clearance-fitted with the connecting hole.

5. The elastic positioning pin disassembly mechanism according to claim 1, characterized in that: The elastic positioning pin disassembly mechanism also includes a hammer, the end of the hammer is connected to the connecting rod, and a clamping hole is arranged on the head end of the hammer.

6. The elastic positioning pin disassembly mechanism according to claim 5, characterized in that: A rotating rod is arranged in the clamping hole, and the hammer is driven by the rotating rod to rotate around the axis of the rotating rod.

7. The elastic positioning pin disassembly mechanism according to claim 1, characterized in that: A limiting block is arranged in the middle area of ​​the connecting rod.

8. The elastic positioning pin disassembly mechanism according to claim 7, characterized in that: A first connection portion is arranged above the limit block, and a second connection portion is arranged below the limit block.

9. The elastic positioning pin disassembly mechanism according to claim 1, characterized in that: The head of any of the pulling sheets extends outward to form a boss.

10. The elastic positioning pin disassembly mechanism according to claim 1, characterized in that: The puller is made of metal, and a black protective layer is provided on the surface of the puller.

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