Self-locking taper pin

Abstract

The utility model relates to a self-locking taper pin which comprises a first pin body, a second pin body and a third pin body, a first exhaust groove is formed in the outer side face of the first pin body in a penetrating mode in the axial direction, and a clamping groove is formed in the radial bottom face of the first exhaust groove; the second pin body comprises a body part, an elastic connecting part, a clamping part and a dismounting part, the dismounting part is fixed with the body part, one end of the elastic connecting part is fixed with the body part, the other end of the elastic connecting part is fixed with the clamping part, and the clamping part can be clamped in the clamping groove; in the axial direction, the outer side face of the body part is provided with a second exhaust groove, the second exhaust groove can be communicated with the first exhaust groove, and during use, air can be exhausted from the first exhaust groove and the second exhaust groove, so that it is avoided that the air hinders the first pin body and the second pin body from being inserted into the taper pin hole; and secondly, external equipment can be matched with the dismounting part to take out the first pin body and the second pin body.

Description

Technical Field

[0001] This utility model relates to the field of positioning pin equipment, and in particular to a self-locking tapered pin. Background Technology

[0002] Locating pins are parts that restrict the degrees of freedom of an object, and tapered pins are common locating pins. In practical use, due to the high precision required between the tapered pin and the tapered pin hole, air inside the hole may not be able to escape when the tapered pin is inserted. This compressed air then hinders the insertion of the tapered pin. Furthermore, to facilitate removal, existing tapered pins generally have internal threaded holes, which increases the processing time and cost. Utility Model Content

[0003] The purpose of this utility model is to provide a self-locking tapered pin, which has the characteristics of being able to release air and being easy to remove, and has good applicability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A self-locking tapered pin for positioning a first component and a second component, comprising:

[0006] The first pin body, along the axial direction, has a first exhaust groove through its outer side, and the radial bottom surface of the first exhaust groove has a snap-fit ​​groove.

[0007] The second pin includes a main body, an elastic connecting part, a snap-fit ​​part, and a disassembly part. The disassembly part is fixed to the main body. One end of the elastic connecting part is fixed to the main body, and the other end is fixed to the snap-fit ​​part. The snap-fit ​​part can be snapped into the snap-fit ​​groove. Along the axial direction, the outer side of the main body is provided with a second exhaust groove, which can communicate with the first exhaust groove.

[0008] Preferably, the radial bottom surface of the first exhaust groove is parallel to the axial direction, and the extension direction of the elastic connection is parallel to the axial direction.

[0009] Preferably, the snap-fit ​​portion protrudes from the elastic connection portion in the radial direction, and the snap-fit ​​portion is provided with a guide surface.

[0010] Preferably, the first component and the second component form a tapered pin hole, the first pin body is located inside the tapered pin hole, and at least a portion of the second pin body is located outside the tapered pin hole.

[0011] Preferably, the elastic connecting portion is located within the first vent groove and is radially spaced from the wall of the conical pin hole.

[0012] Preferably, the disassembly part is located outside the conical pin hole, and the disassembly part is fixedly disposed inside the second exhaust groove. In the radial direction, the disassembly part protrudes from the radial bottom surface of the second exhaust groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The self-locking tapered pin provided in the above technical solution has a first vent groove and a second vent groove respectively for the first pin and the second pin. When the first pin and the second pin are inserted into the tapered pin hole, air can be discharged from the first vent groove and the second vent groove, thereby avoiding air obstructing the insertion of the first pin and the second pin into the tapered pin hole. Secondly, since the snap-fit ​​part can be snapped into the snap-fit ​​groove, the second pin can form an integral part with the first pin. External equipment can cooperate with the disassembly part to remove the first pin and the second pin. Attached Figure Description

[0015] Figure 1 A schematic diagram of the assembly of the self-locking tapered pin with the first component and the second component provided in an embodiment of this utility model;

[0016] Figure 2 A cross-sectional schematic diagram of the self-locking tapered pin, the first component, and the second component provided in an embodiment of this utility model;

[0017] Figure 3 An exploded view of the self-locking tapered pin and the first and second components provided in this embodiment of the utility model;

[0018] Figure 4 A schematic diagram of the second pin provided in an embodiment of this utility model;

[0019] Figure 5 A schematic diagram of the first pin provided in an embodiment of this utility model.

[0020] 1. First component; 2. Second component; 3. First pin; 31. First vent groove; 32. Snap-fit ​​groove; 4. Second pin; 41. Main body; 42. Elastic connection part; 43. Snap-fit ​​part; 44. Second vent groove; 45. Guide surface; 46. Disassembly part. Detailed Implementation

[0021] The present invention will now be described in more detail with reference to the accompanying drawings. It should be noted that the description of the present invention with reference to the accompanying drawings is merely illustrative and not restrictive. Various embodiments can be combined with each other to form other embodiments not shown in the following description.

[0022] Please see Figures 1 to 5The self-locking tapered pin provided in this embodiment includes a first pin body 3 and a second pin body 4. The self-locking tapered pin can be used for positioning the first component 1 and the second component 2, wherein the first component 1 and the second component 2 together form a tapered pin hole, and the tapered pin hole located in the first component 1 cannot penetrate the first component 1, while the tapered pin hole located in the second component 2 must penetrate the second component 2.

[0023] Specifically, along the axial direction, the outer side of the first pin 3 is provided with a first exhaust groove 31, and the radial bottom surface of the first exhaust groove 31 is provided with a snap-fit ​​groove 32; the second pin 4 includes a body part 41, an elastic connecting part 42, a snap-fit ​​part 43, and a disassembly part 46. The disassembly part 46 is fixed to the body part 41, one end of the elastic connecting part 42 is fixed to the body part 41, and the other end is fixed to the snap-fit ​​part 43, and the snap-fit ​​part 43 can be snapped into the snap-fit ​​groove 32; along the axial direction, the outer side of the body part 41 is provided with a second exhaust groove 44, and the second exhaust groove 44 can communicate with the first exhaust groove 31.

[0024] The self-locking tapered pin provided in this embodiment has a first vent groove 31 and a second vent groove 44 respectively provided for the first pin 3 and the second pin 4. When the first pin 3 and the second pin 4 are inserted into the tapered pin hole, air can be discharged from the first vent groove 31 and the second vent groove 44, thereby avoiding air obstructing the insertion of the first pin 3 and the second pin 4 into the tapered pin hole. Secondly, since the locking part 43 can be locked in the locking groove 32, the second pin 4 can form an integral part with the first pin 3. External equipment can cooperate with the disassembly part 46 to remove the first pin 3 and the second pin 4.

[0025] The axial direction of the first pin 3 is defined as the axial direction, and the direction perpendicular to the axial direction is defined as the radial direction. Furthermore, the first pin 3 and the second pin 4 are coaxially arranged; therefore, the axial and radial directions of the first pin 3 and the second pin 4 are the same, and in this embodiment, they are directly referred to as the axial and radial directions.

[0026] It is important to understand that the elasticity of the elastic connecting part 42 refers to its ability to bend slightly radially, facilitating the engagement part 43 to engage within the engagement groove 32. Furthermore, the elastic connecting part 42 cannot be compressed or stretched axially.

[0027] The radial bottom surface of the first exhaust groove 31 is parallel to the axial direction, and the extension direction of the elastic connecting part 42 is also parallel to the axial direction. Therefore, the elastic connecting part 42 and the snap-fit ​​part 43 can be inserted into or removed from the first exhaust groove 31 simply by moving along the axial direction, which is convenient for the user.

[0028] Radially, the snap-fit ​​portion 43 protrudes from the elastic connecting portion 42, and the protrusion direction is towards the radially inward side, that is, towards the radial bottom surface of the first exhaust groove 31. The snap-fit ​​groove 32 is provided on the radial bottom surface of the first exhaust groove 31, thus facilitating the insertion of the snap-fit ​​portion 43 into the snap-fit ​​groove 32. The snap-fit ​​portion 43 is provided with a guide surface 45, which can guide the snap-fit ​​portion 43 when it is inserted into the first exhaust groove 31, thereby reducing the difficulty of operation for the user.

[0029] The first pin 3 is located inside the tapered pin hole, and at least part of the second pin 4 is located outside the tapered pin hole.

[0030] The elastic connecting part 42 can be located within the first exhaust groove 31, and is radially spaced from the wall of the tapered pin hole. Therefore, when the first pin 3 and the second pin 4 are used as a single unit, the elastic connecting part 42 has a gap with the wall of the tapered pin hole, allowing air to flow out, thus preventing the elastic connecting part 42 from affecting air discharge.

[0031] The disassembly part 46 is located outside the conical pin hole and is fixedly installed inside the second exhaust groove 44. In the radial direction, the disassembly part 46 protrudes from the radial bottom surface of the second exhaust groove 44.

[0032] Importantly, in this embodiment, fixing the disassembly part 46 within the second venting groove 44 ensures that the outer surface of the second pin 4 remains a conical surface. This allows the first pin 3 and the second pin 4 to be inserted into deeper conical pin holes, providing better positioning. Furthermore, since the disassembly part 46 protrudes from the radial bottom surface of the second venting groove 44, the user can insert a small pry bar into the second venting groove 44 and move the pry bar axially. The pry bar, by contacting the disassembly part 46, can knock out the first pin 3 and the second pin 4. This avoids the need to machine internal threaded holes, thereby reducing manufacturing difficulty and cost.

[0033] In summary, based on actual needs, this embodiment can have two usage scenarios. The first scenario requires that the conical pin not protrude from the surfaces of the first component 1 and the second component 2. In this case, only the first pin 3 can be used. Specifically, the first pin 3 is inserted into the conical pin hole, and the air in the conical pin hole can be discharged through the first vent groove 31. When it is necessary to remove the first pin 3, it is only necessary to move the second pin 4 axially. The locking part 43 moves along the first vent groove 31 and finally makes the locking part 43 inserted into the locking groove 32. At this time, the external device can remove the first pin 3 and the second pin 4 together through the disassembly part 46. The second method does not require a specific positional relationship between the conical pin and the first component 1 and the second component 2. In this case, the snap-fit ​​part 43 can be inserted into the snap-fit ​​groove 32 first, so that the first pin 3 and the second pin 4 become a whole. Then, the first pin 3 and the second pin 4 are inserted together into the conical pin hole. The air in the conical pin hole can be connected through the first exhaust groove 31 and the second exhaust groove 44. Since the second pin 4 can abut against the hole wall of the conical pin hole, the positioning effect is better. When it is necessary to remove the first pin 3 and the second pin 4, the external equipment can remove the first pin 3 and the second pin 4 together through the disassembly part 46.

[0034] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A self-locking conical pin for positioning a first part (1) and a second part (2), characterized in that, The utility model relates to a first pin body (3) is provided with first exhaust groove (31) on the outer side surface, and the radial bottom surface of first exhaust groove (31) is provided with clamping groove (32), and the second pin body (4) is provided with second exhaust groove (44) on the outer side surface of body part (41), and second exhaust groove (44) can communicate with first exhaust groove (31). The radial bottom surface of first exhaust groove (31) is parallel to the axial direction, and the extension direction of elastic connecting part (42) is parallel to the axial direction. The clamping part (43) protrudes from the elastic connecting part (42) in the radial direction, and a guide surface (45) is arranged on the clamping part (43).

2. The self-locking conical pin according to claim 1, wherein The first component (1) and the second component (2) form a conical pin hole, the first pin body (3) is located in the conical pin hole, and at least part of the second pin body (4) is located outside the conical pin hole.

3. The self-locking conical pin of claim 1, wherein, The elastic connecting part (42) can be located in the first exhaust groove (31), and the elastic connecting part (42) is spaced apart from the hole wall of the conical pin hole in the radial direction.

4. The self-locking conical pin of claim 1, wherein, The dismounting part (46) is located outside the conical pin hole, the dismounting part (46) is fixedly arranged in the second exhaust groove (44), and the dismounting part (46) protrudes from the radial bottom surface of the second exhaust groove (44) in the radial direction.

5. The self-locking conical pin according to claim 4, wherein ​ 6. The self-locking conical pin of claim 4, wherein, ​

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