Anti-falling device for stainless steel elastic cylindrical pin

By designing the upper pressure head and lower support seat, the stainless steel elastic cylindrical pin is flanged and deformed, which solves its shedding problem and achieves stable fixation under vibration conditions.

CN222244600UActive Publication Date: 2024-12-27HANGZHOU EBOYLAMP ELECTRONICS CO LTD
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Patent Information

Application Number
CN202421078665.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-17
Publication Date
2024-12-27
Estimated Expiration
2034-05-17

AI Technical Summary

Technical Problem

The stainless steel elastic cylindrical pin is prone to fall off due to static loads and vibrations after long-term use, and lacks effective fixing devices.

Method used

A stainless steel elastic cylindrical pin anti-falling device including an upper press head and a lower support seat is designed. The upper and lower ends of the stainless steel elastic cylindrical pin are irreversible and flanged to make it fit with the assembly hole card. Connect to ensure that it is fixed.

Benefits of technology

Under high frequency vibration, ensure that the stainless steel elastic cylindrical pin is firmly fixed in the assembly hole to reduce the risk of shedding.

✦ Generated by Eureka AI based on patent content.

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Abstract

An anti-falling device for a stainless steel elastic cylindrical pin comprises an upper pressing head, and an upper pressing head abutting part abutting against the upper end of the stainless steel elastic cylindrical pin is formed at the bottom of the upper pressing head. Comprising a lower supporting base located at the lower end of the upper pressing head and opposite to the upper pressing head, a lower supporting base abutting portion abutting against the lower end of a stainless steel elastic cylindrical pin is formed at the top of the lower supporting base, the stainless steel elastic cylindrical pin is located in an assembly hole, and the upper pressing head is pressed downwards to enable the upper pressing head abutting portion to press the upper end of the stainless steel elastic cylindrical pin. The lower end of the stainless steel elastic cylindrical pin is pressed by the abutting portion of the lower supporting seat, the top and the bottom of the stainless steel elastic cylindrical pin form turnups capable of being matched with the assembly hole in a clamped mode, and the stainless steel elastic cylindrical pin can still be stably fixed in the assembly hole through the upper pressing head and the lower supporting seat under the condition of frequent vibration.
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Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a stainless steel elastic cylindrical pin anti-falling device. Background Art

[0002] Stainless steel elastic cylindrical pin is a headless hollow cylindrical body with axial slot and chamfered ends. It is used for positioning, connecting and fixing between parts. It has good elasticity and shear resistance. The outer diameter of this type of cylindrical pin is slightly larger than the assembly hole diameter.

[0003] The installation process of the stainless steel elastic cylindrical pin is as follows: first insert the stainless steel elastic cylindrical pin into the shaft hole assembly hole, and then use a hammer to knock the stainless steel elastic cylindrical pin completely into the shaft hole. During the installation process, the side of the stainless steel elastic cylindrical pin exerts pressure on the assembly hole, thereby generating friction, and accordingly, the elastic cylindrical pin is fixed to the workpiece.

[0004] However, during actual use, the workpiece and the stainless steel elastic cylindrical pin will continue to bear static loads, and there is a great risk of falling off after long-term operation.

[0005] Therefore, it is necessary to design a stainless steel elastic cylindrical pin anti-falling device, which can stably fix the stainless steel elastic cylindrical pin in the assembly hole without being disturbed by external factors. Summary of the invention

[0006] The utility model aims to overcome the defects in the prior art and provides a stainless steel elastic cylindrical pin anti-dropping device, so that the stainless steel elastic cylindrical pin can still be stably fixed in the assembly hole under the condition of frequent vibration.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: a stainless steel elastic cylindrical pin anti-falling device, including an upper pressure head, the bottom of the upper pressure head forms an upper pressure head abutting portion abutting the upper end of the stainless steel elastic cylindrical pin; including a lower support seat located at the lower end of the upper pressure head and opposite to the upper pressure head, the top of the lower support seat forms a lower support seat abutting portion abutting the lower end of the stainless steel elastic cylindrical pin, the stainless steel elastic cylindrical pin is located in the assembly hole, the upper pressure head is pressed down, so that the upper pressure head abutting portion presses down the upper end of the stainless steel elastic cylindrical pin, and the lower support seat abutting portion presses up the lower end of the stainless steel elastic cylindrical pin, and the top and bottom of the stainless steel elastic cylindrical pin form flanges that can be snap-fitted with the assembly hole.

[0008] As a preferred solution of the utility model, it includes a manual press, an upper pressing head is installed at the upper end of the manual press, and the manual press can control the upper pressing head to move up and down toward the lower support seat.

[0009] As a preferred solution of the utility model, it includes flat-nose pliers, which clamp a lower support seat, and the flat-nose pliers are arranged at the lower end of the manual press, and the lower support seat abutment portion of the lower support seat and the upper pressure head abutment portion of the upper pressure head are located on the same vertical line.

[0010] As a preferred solution of the utility model, the upper pressure head includes a matching portion matching with the inner hole of the manual press, and a stepped portion connecting the upper pressure head abutting portion and the matching portion, and the diameter of the stepped portion is larger than the diameter of the matching portion.

[0011] As a preferred solution of the present invention, the height dimension of the step portion is smaller than the height dimension of the matching portion.

[0012] As a preferred solution of the utility model, the upper pressure head abutting portion includes an upper pressure head supporting section and an upper pressure head conical portion, and the upper pressure head conical portion abuts against the top of the stainless steel elastic cylindrical pin.

[0013] As a preferred solution of the utility model, the lower support seat includes a clamping portion clamped by flat-nose pliers, and a supporting portion connecting the clamping portion and the abutting portion of the lower support seat, and the connection between the clamping portion and the supporting portion is transitioned through a rounded corner.

[0014] As a preferred solution of the utility model, the lower support seat abutment portion includes a support seat support section and a support seat conical portion, the support seat conical portion abuts against the bottom of a stainless steel elastic cylindrical pin, and the diameter of the support seat support section is the same as the diameter of the upper pressure head support section.

[0015] As a preferred solution of the utility model, the height dimension of the upper pressure head support section is greater than the height dimension of the support seat support section.

[0016] As a preferred solution of the utility model, the upper pressure head and the lower support seat are both made of cold-working die steel.

[0017] The beneficial effects of the utility model are:

[0018] The utility model forms irreversible outward flanges at the upper and lower ends of the stainless steel elastic cylindrical pin through the upper pressure head and the lower support seat. The stainless steel elastic cylindrical pin cannot move even under high-frequency vibration through the constraint of the flanged edge, and can ensure that the stainless steel elastic cylindrical pin is firmly fixed in the assembly hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the upper pressure head of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the lower support seat of the utility model;

[0021] Figure 3 It is a top view of the lower support seat of the utility model;

[0022] Figure 4 This is the usage status of the stainless steel cylindrical pin of the utility model Figure 1 ;

[0023] Figure 5 This is the usage status of the stainless steel cylindrical pin of the utility model Figure 2 ;

[0024] Figure 6 It is a usage state diagram of the utility model;

[0025] The accompanying drawings are denoted as follows: upper pressure head 1, lower support seat 2, manual press 3, flat-nose pliers 4, stainless steel elastic cylindrical pin 5, upper pressure head abutting portion 11, matching portion 12, stepped portion 13, lower support seat abutting portion 21, clamping portion 22, supporting portion 23, flange 51, upper pressure head supporting section 111, upper pressure head conical portion 112, support seat supporting section 211, support seat conical portion 212. DETAILED DESCRIPTION

[0026] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-Figure 6 As shown, a stainless steel elastic cylindrical pin anti-falling device includes an upper pressure head 1, the bottom of the upper pressure head 1 forms an upper pressure head abutting portion 11 abutting the upper end of the stainless steel elastic cylindrical pin 5; includes a lower support seat 2 located at the lower end of the upper pressure head 1 and opposite to the upper pressure head 1, the top of the lower support seat 2 forms a lower support seat abutting portion 21 abutting the lower end of the stainless steel elastic cylindrical pin 5, the stainless steel elastic cylindrical pin 5 is located in the assembly hole, the upper pressure head 1 is pressed down, so that the upper pressure head abutting portion 11 presses down the upper end of the stainless steel elastic cylindrical pin 5, and the lower support seat abutting portion 21 presses up the lower end of the stainless steel elastic cylindrical pin 5, and the top and bottom of the stainless steel elastic cylindrical pin 5 form flanges 51 that can be snap-fitted with the assembly hole.

[0028] The stainless steel elastic cylindrical pin of the utility model will produce irreversible deformation when squeezed by the upper pressure head 1 and the lower support seat 2, and change from a conventional cylindrical shape to a dumbbell shape, that is, the middle of the stainless steel elastic cylindrical pin 5 is still cylindrical but flanges 51 are formed on both sides. The dumbbell shape has large ends and a small middle, so that the stainless steel elastic cylindrical pin cannot move in the upper and lower directions under high-frequency vibration, thereby ensuring that it is firmly fixed in the assembly hole.

[0029] The upper press head 1 includes a matching portion 12 and a stepped portion 13 connecting the upper press head abutting portion 11 and the matching portion 12. The diameter of the stepped portion 13 is larger than the diameter of the matching portion 12, and the height of the stepped portion 13 is smaller than the height of the matching portion 12. The stepped portion 13 serves as a stop step when the upper press head 1 is press-assembled.

[0030] The upper pressure head abutting portion 11 comprises an upper pressure head supporting section 111 and an upper pressure head conical portion 112 , and the upper pressure head conical portion 112 abuts against the top of the stainless steel elastic cylindrical pin.

[0031] The upper pressing head 1 is preferably made of SKD11 high wear-resistant and tough general cold-working die steel, and the hardness after heat treatment is ≥HRC50.

[0032] The utility model controls the up and down movement of the upper pressure head 1 by clamping the matching part 12. The diameter of the step portion 13 at the lower end of the matching part 12 is larger than the diameter of the matching part 12, and serves as a stop step when the matching part 12 is pressed down. The top of the upper pressure head conical portion 112 of the upper pressure head abutting portion 11 is in contact with the top of the stainless steel elastic cylindrical pin 5 at a 90° cone angle.

[0033] The lower support seat 2 includes a clamping portion 22 and a supporting portion 23 connecting the clamping portion 22 and the lower support seat abutting portion 21. The connection between the clamping portion 22 and the supporting portion 23 is transitioned through a rounded corner, and the size of the rounded corner is preferably R6.

[0034] The lower support seat abutment portion 21 includes a support seat support section 211 and a support seat conical portion 212 , the support seat conical portion 212 abuts against the bottom of a stainless steel elastic cylindrical pin, and the diameter of the support seat support section 211 is the same as the diameter of the upper pressure head support section 111 .

[0035] The upper pressing head 1 is preferably made of SKD11 high wear-resistant and tough general cold-working die steel, and the hardness after heat treatment is ≥HRC50.

[0036] The utility model determines the position of the clamping part 22 and fixes it by clamping the clamping part 22. The supporting part 23 connects the clamping part 22 and the lower supporting seat abutting part 21. The rounded corners on the supporting part 23 reduce stress concentration to avoid breakage of the lower supporting seat abutting part 21. The top of the supporting seat conical part 212 of the lower supporting seat abutting part 21 has a 90° conical angle and contacts with the bottom of the stainless steel elastic cylindrical pin 5.

[0037] The height dimension of the upper pressure head support section 111 is greater than the height dimension of the support seat support section 211. The upper pressure head support section 111 is a transition section between the stepped portion 13 and the upper pressure head conical portion 112. When the upper pressure head 1 presses down the stainless steel elastic cylindrical pin, due to the existence of the upper pressure head support section 111, it can be clearly observed whether the flange 51 of the stainless steel elastic cylindrical pin 5 is processed in place.

[0038] In order to facilitate the flanging 51 of the stainless steel elastic cylindrical pin 5 , the matching portion 12 of the upper pressing head 1 can be matched with the inner hole of the manual press 3 , and the clamping portion 22 of the lower supporting seat 2 can be clamped by the flat-nose pliers 4 .

[0039] An upper pressing head 1 is installed at the upper end of the manual pressing machine 3 , and the manual pressing machine 3 can control the upper pressing head 1 to move up and down toward the lower supporting seat 2 .

[0040] The lower support seat 2 is clamped on the flat-nose pliers 4, and the flat-nose pliers 4 are arranged at the lower end of the manual press 3. The lower support seat abutment portion 21 of the lower support seat 2 and the upper press head abutment portion 11 of the upper press head 1 are located on the same vertical line.

[0041] A stainless steel elastic cylindrical pin anti-dropping device is specifically implemented, comprising the following steps:

[0042] Step 1: Make a large chamfer at the upper and lower ends of the assembly hole during machining so that the stainless steel elastic cylindrical pin has room for deformation;

[0043] Step 2: Insert the stainless steel elastic cylindrical pin into the assembly hole;

[0044] Step 3: Use a tool to knock the stainless steel elastic cylindrical pin into the assembly hole;

[0045] Step 4: Fix the upper pressing head on the manual press;

[0046] Step 5: Fix the lower support seat on the flat-nose pliers;

[0047] Step 6: Press down with a manual press until the stainless steel elastic cylindrical pin is deformed to form a flange that fits the assembly hole.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0049] Although this article uses the figure marks in the figures more frequently: upper pressure head 1, lower support seat 2, manual press 3, flat-nose pliers 4, stainless steel elastic cylindrical pin 5, upper pressure head abutment portion 11, matching portion 12, step portion 13, lower support seat abutment portion 21, clamping portion 22, support portion 23, flange 51, upper pressure head support section 111, upper pressure head conical portion 112, support seat support section 211, support seat conical portion 212 and other terms, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A stainless steel elastic cylindrical pin anti-dropping device, characterized in that: The invention comprises an upper pressing head (1), the bottom of which forms an upper pressing head abutting portion (11) abutting against the upper end of a stainless steel elastic cylindrical pin (5); and a lower supporting seat (2) located at the lower end of the upper pressing head (1) and opposite to the upper pressing head (1), the top of which forms a lower supporting seat abutting portion (21) abutting against the lower end of the stainless steel elastic cylindrical pin (5), the stainless steel elastic cylindrical pin (5) being located in an assembly hole, the upper pressing head (1) is pressed downward, so that the upper pressing head abutting portion (11) presses downward against the upper end of the stainless steel elastic cylindrical pin (5), and the lower supporting seat abutting portion (21) presses upward against the lower end of the stainless steel elastic cylindrical pin (5), and the top and bottom of the stainless steel elastic cylindrical pin (5) form flanges (51) that can be snap-fitted with the assembly hole.

2. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: It comprises a manual press (3), an upper press head (1) being mounted on the upper end of the manual press (3), and the manual press (3) can control the upper press head (1) to move up and down in the direction of a lower support seat (2).

3. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1 is characterized in that: The invention comprises a flat-nose pliers (4), wherein a lower support seat (2) is clamped on the flat-nose pliers (4), and the flat-nose pliers (4) are arranged at the lower end of a manual press (3), and a lower support seat abutment portion (21) of the lower support seat (2) and an upper press head abutment portion (11) of an upper press head (1) are located on the same vertical line.

4. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: The upper pressing head (1) comprises a matching portion (12) matching with the inner hole of the manual pressing machine (3), and a stepped portion (13) connecting the upper pressing head abutting portion (11) and the matching portion (12), wherein the diameter of the stepped portion (13) is greater than the diameter of the matching portion (12).

5. The stainless steel elastic cylindrical pin anti-dropping device according to claim 4, characterized in that: The height dimension of the step portion (13) is smaller than the height dimension of the matching portion (12).

6. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: The upper pressure head abutting portion (11) comprises an upper pressure head supporting section (111) and an upper pressure head conical portion (112), and the upper pressure head conical portion (112) abuts against the top of a stainless steel elastic cylindrical pin.

7. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: The lower support seat (2) comprises a clamping portion (22) clamped by a flat-nose pliers (4), and a supporting portion (23) connecting the clamping portion (22) and the lower support seat abutting portion (21), wherein the connection between the clamping portion (22) and the supporting portion (23) is transitioned through a rounded corner.

8. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: The lower support seat abutment portion (21) comprises a support seat support section (211) and a support seat conical portion (212), the support seat conical portion (212) abuts against the bottom of a stainless steel elastic cylindrical pin, and the diameter of the support seat support section (211) is the same as the diameter of the upper pressure head support section (111).

9. The stainless steel elastic cylindrical pin anti-dropping device according to claim 6, characterized in that: The height dimension of the upper pressure head support section (111) is greater than the height dimension of the support seat support section (211).

10. The stainless steel elastic cylindrical pin anti-dropping device according to claim 1, characterized in that: The upper pressure head (1) and the lower support seat (2) are both made of cold-working die steel.