A mounting aid for a solid pin

Abstract

A kind of installation aid of solid pin, including positioning guide device, knock shaft, the positioning guide device is equipped with axial through stepped hole, the knock shaft is arranged in stepped hole, the knock shaft is three-section structure, wherein first large-diameter section extends out the second large-diameter section of stepped hole of positioning guide device, the first large-diameter section is knock end, its end face is circular arc surface;First medium-diameter section is guide section, and its diameter size matches with the diameter size of second large-diameter section;First small-diameter section is pressure rod section, and its diameter size matches with the diameter size of second small-diameter section of stepped hole of positioning guide device, the first medium-diameter section of knock shaft is equipped with an axial extension anti-drop slot, the positioning guide device is radially equipped with an anti-drop pin, the anti-drop pin is inserted into anti-drop slot, forms limit anti-drop structure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly, specifically to an installation aid for a solid pin. Background Technology

[0002] The invention patent application CN104260048A, entitled "A Quick Positioning Fixture for Positioning Pins," provides a fixture for assembling positioning pins, but this fixture has the following problems:

[0003] 1. The top surface of the striking boss in this assembly fixture is flat. When striking with a hammer, the striking point is relatively random, and it cannot be guaranteed that the force of each strike will be vertically downward, nor can it be guaranteed that each strike will hit the center point of the striking boss. This results in the striking force and the center line of the striking axis not being aligned, which will cause the perpendicularity of the locating pin to be compromised after installation, leading to product scrap. Furthermore, the uneven impact force over a long period of time can cause internal deformation of the assembly fixture, easily leading to damage to the assembly fixture.

[0004] 2. The assembly fixture has a positioning hole at the lower end of the striking shaft and a nylon pad at the lower end of the guide sleeve. The positioning pin is inserted into the positioning hole for positioning and restriction, but no other part of the positioning pin is restricted. Therefore, when the positioning pin is subjected to a force that is not on the same line as the shaft centerline, it is more likely to cause the positioning pin to shift, resulting in product scrap.

[0005] 3. The striking shaft and guide sleeve of this assembly tooling lack a limiting and anti-detachment structure, which can easily lead to the separation of the striking shaft and guide sleeve, making it difficult to store the assembly tooling. Summary of the Invention

[0006] To address the aforementioned problems, this utility model provides an installation aid for solid pins. By setting the striking end to an arc surface, only the highest point of the arc surface needs to be struck to ensure that the striking force is on the same straight line as the center line of the striking axis, allowing the solid pin to be properly struck into the product.

[0007] The technical solution of this utility model is as follows: an installation aid for a solid pin, including a positioning guide device and a striking shaft. The positioning guide device has an axially penetrating stepped hole, and the striking shaft is disposed in the stepped hole. The striking shaft has a three-section structure, wherein the first large-diameter section extends outward from the second large-diameter section of the stepped hole of the positioning guide device, and the first large-diameter section is the striking end with an arc surface at its end; the first middle-diameter section is the guide section, and its diameter matches the diameter of the second large-diameter section; the first small-diameter section is the pressure rod section, and its diameter matches the diameter of the second small-diameter section of the stepped hole of the positioning guide device. The first middle-diameter section of the striking shaft is provided with an axially extending anti-detachment groove, and the positioning guide device is provided with a radially extending anti-detachment pin, which is inserted into the anti-detachment groove to form a limiting and anti-detachment structure.

[0008] Preferably, the bottom surface of the positioning guide device is provided with an annular groove, and an O-ring is provided in the annular groove.

[0009] Preferably, the O-ring protrudes 0.2 to 0.6 mm from the bottom surface of the positioning guide device.

[0010] Preferably, an annular degassing groove is provided in the second large diameter section of the positioning guide device.

[0011] Preferably, the depth of the annular degassing groove is 1.8 to 2.2 mm.

[0012] Preferably, the port of the second minor diameter section of the positioning guide device is provided with a guide ramp.

[0013] Preferably, the length of the anti-detachment groove is greater than the axial displacement of the striking shaft.

[0014] The advantages of this utility model are:

[0015] 1. This utility model sets the striking end of the striking shaft as an arc surface, so that each strike only needs to strike the highest point of the arc surface, which can ensure that the striking force is on the same straight line as the center line of the striking shaft, avoiding the solid pin from shifting and causing product scrapping, and also avoiding the striking shaft from damaging the installation accessories.

[0016] 2. This utility model provides a stepped hole on the positioning guide device, and limits the solid pin as a whole through the second small diameter section of the stepped hole, so as to avoid the solid pin being misaligned and causing the product to be scrapped.

[0017] 3. This utility model provides an anti-detachment groove in the guide section of the striking shaft and an anti-detachment pin on the positioning guide device. The anti-detachment pin and the anti-detachment groove cooperate to prevent the striking shaft from detaching from the positioning guide device, which facilitates storage. Attached Figure Description

[0018] Fig. 1 This is a schematic diagram of the structure of this utility model with the solid pin installed;

[0019] Fig. 2 This is a schematic diagram of the positioning and guiding device of this utility model;

[0020] Fig. 3 This is a schematic diagram of the structure of the striking shaft of this utility model. Detailed Implementation

[0021] See Figs. 1-3An installation aid for a solid pin includes a positioning guide device 1 and a striking shaft 2. The positioning guide device 1 has an axially penetrating stepped hole 11. The striking shaft 2 is disposed within the stepped hole 11 and has a three-section structure. The first large-diameter section 21 extends outward from the second large-diameter section 111 of the stepped hole 11 of the positioning guide device 1. The first large-diameter section 21 is the striking end, and its end face is an arc surface. The first medium-diameter section 23 is the guide section, and its diameter matches the diameter of the second large-diameter section 111. The first small-diameter section 24 is the pressure rod section, and its diameter matches the diameter of the second small-diameter section 112 of the stepped hole 11 of the positioning guide device 1. The diameter of the second small-diameter section 112 is slightly larger than the diameter of the solid pin 5. The port of the second small-diameter section 112 of the positioning guide device 1 has a guide slope 14, which facilitates the insertion of the solid pin 5 into the second small-diameter section 112 for positioning. The first median diameter section 23 of the striking shaft 2 is provided with an axially extending anti-detachment groove 22. The positioning guide device 1 is provided with a radially extending anti-detachment pin 3. The anti-detachment pin 3 is inserted into the anti-detachment groove 22 to form a limiting anti-detachment structure. The length of the anti-detachment groove 22 is greater than the axial displacement of the striking shaft 2, so as to avoid the limiting anti-detachment structure interfering with the axial movement of the striking shaft 2 and ensure that the striking shaft 2 can strike the solid pin 5 to the set position. The bottom surface of the positioning guide device 1 is provided with an annular groove 12. An O-ring damping ring 4 is provided in the annular groove 12 to avoid hard contact between the bottom surface of the positioning guide device 1 and the machined surface of the product 6, and to prevent the bottom surface of the positioning guide device 1 from damaging the machined surface of the product 6 during striking. The O-ring damping ring 4 protrudes 0.2-0.6mm from the bottom surface of the positioning guide device 1. In this embodiment, the O-ring 4 protrudes 0.4mm from the bottom surface of the positioning guide device 1. If the O-ring 4 protrudes too much, the positioning guide device 1 may become unstable, affecting the assembly of the solid pin 5. If the O-ring 4 protrudes too little, the bottom surface of the positioning guide device 1 may be damaged on the machined surface of the product 6 during impact. An annular degassing groove 13 is provided in the second large diameter section 111 of the positioning guide device 1 to degas and prevent air resistance from forming when the striking shaft 2 moves axially under the impact force. The groove depth of the annular degassing groove 13 is 1.8–2.2 mm; in this embodiment, the groove depth is 2 mm.

[0022] See Fig. 1 The process of using this utility model is as follows: insert the solid pin 5 into the second small diameter section 112 of the positioning guide device 1, leaving a small section of pin, insert this part of the pin into the pin hole of the product 6, and then tap the highest point of the arc surface of the first large diameter section 21 of the shaft 2 until the first large diameter section 21 contacts the positioning guide device 1, stop tapping, and the installation of the solid pin 5 is completed.

Claims

1. A mounting tool for a solid pin, characterized in that: Includes a positioning guide device (1) and a striking shaft (2). The positioning guide device (1) has an axially penetrating stepped hole (11). The striking shaft (2) is located inside the stepped hole (11). The striking shaft (2) has a three-section structure, wherein the first large-diameter section (21) extends outward from the second large-diameter section (111) of the stepped hole (11) of the positioning guide device (1). The first large-diameter section (21) is the striking end, and its end face is an arc surface; the first middle-diameter section (23) is the guide section, and its... The diameter is matched with the diameter of the second large diameter section (111); the first small diameter section (24) is a pressure rod section, and its diameter is matched with the diameter of the second small diameter section (112) of the stepped hole (11) of the positioning guide device (1). The first middle diameter section (23) of the striking shaft (2) is provided with an axially extending anti-detachment groove (22), and the positioning guide device (1) is provided with a radial anti-detachment pin (3). The anti-detachment pin (3) is inserted into the anti-detachment groove (22) to form a limiting anti-detachment structure.

2. The mounting fixture for a solid pin according to claim 1, characterized in that: The bottom surface of the positioning guide device (1) is provided with an annular groove (12), and an O-ring (4) is provided in the annular groove (12).

3. The mounting fixture for a solid pin according to claim 2, characterized in that: The O-ring (4) protrudes 0.2 to 0.6 mm from the bottom surface of the positioning guide device (1).

4. The mounting fixture for a solid pin according to claim 1, characterized in that: An annular degassing groove (13) is provided in the second large diameter section (111) of the positioning guide device (1).

5. The mounting fixture for a solid pin according to claim 4, characterized in that: The depth of the annular degassing groove (13) is 1.8 to 2.2 mm.

6. The mounting fixture for a solid pin according to claim 1, characterized in that: The second minor diameter section (112) of the positioning guide device (1) is provided with a guide slope (14).

7. The mounting fixture for a solid pin according to claim 1, characterized in that: The length of the anti-detachment groove (22) is greater than the displacement of the axial movement of the striking shaft (2).

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