A tool for installing anti-misinsertion identification pins

Abstract

The present application belongs to the technical field of identification pin installation tool, and particularly relates to a mistake-proof insertion identification pin installation tool. The technical scheme is as follows: a mistake-proof insertion identification pin installation tool, comprising a spring fixing cap, a compression cylinder and a connecting nut connected in sequence, a pressure release inclined angle is arranged in the compression cylinder; a compression spring is connected in the spring fixing cap, the other end of the compression spring is connected with a punch; a blind hole is arranged on the punch, a two-stage spring and a steel ball are arranged in the blind hole, the steel ball is in contact with the inner wall of the compression cylinder; an extension cylinder is arranged on the lower cylinder of the compression cylinder, an impact sleeve is arranged in the extension cylinder, a percussion head is arranged in the counterbore of the impact sleeve, a first-stage spring and a positioning needle are arranged in the upper cavity of the percussion head, the other end of the positioning needle passes through a stepped hole, a return spring is connected between the spring fixing shaft of the percussion head and the punch, and a percussion needle is arranged on the spring fixing shaft. The present application provides a mistake-proof insertion identification pin installation tool which is more convenient to install, saves time and labor, and improves assembly quality.

Description

Technical Field

[0001] This invention belongs to the technical field of identification pin installation tools, and specifically relates to an identification pin installation tool to prevent incorrect insertion. Background Technology

[0002] Many electronic devices use locating pins to ensure accurate mating of components such as boxes, plugs, modules, and printed circuit boards. To prevent incorrect insertion, some plugs with the same dimensions but different electrical properties are often marked on the base plate and plug itself for identification. However, with hundreds or even thousands of plugs, and especially under various interference conditions during long-term use or maintenance, even careful operation can lead to incorrect insertion. To avoid accidents caused by incorrect insertion, mis-insertion identification pins are used. Some standards require each identification pin to withstand a torque of 40N and a tensile force of 40N for 10–15 seconds.

[0003] Mis-mating identification pins, as dedicated accessories for blind mating and mis-mating prevention of LRM connectors, are generally provided with the plug or socket as individual components and are installed by the user. During use, the user can adjust the orientation and arrange them in various combinations to achieve different identification key positions, effectively solving the problem of connector mis-mating.

[0004] An LRM connector frame has 2-3 identification pin mounting positions. Each position consists of 2 metal pins and 1 plastic retaining ring. During installation, after the electrical components are mounted on the PCB and the connector frame is assembled, the identification pins are first positioned, the retaining ring is then fitted, and the pins are pressed firmly into the housing, securing them with an interference fit. If the pins need to be readjusted, they can be pulled out with pliers or other tools, the retaining ring removed, the position adjusted, a new retaining ring fitted, and then pressed in again. A significant amount of force is required after fitting the retaining ring to press the identification pins into the keyway of the housing. Current techniques typically employ two screwdrivers or two appropriately sized metal rods, with each hand supporting a recess in the pin and pressing down simultaneously to insert the identification pin into the keyway. Because the identification pin has multiple possible configurations, the protruding parts of the assembled pins are not symmetrical. During pressing, the upper and lower surfaces of the pin must be evenly stressed to prevent misalignment. Applying even force simultaneously to the two recesses and the upper surface in different positions is challenging, leading to rework due to misalignment. This installation method is also labor-intensive, resulting in high operator workload during mass production and increasing the risk of PCB board deformation and damage. No relevant assembly techniques or reports have been found in publicly available literature and patent applications; therefore, it is necessary to develop a quick and high-quality identification pin installation tool. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, the purpose of this invention is to provide an anti-misinsertion identification pin installation tool that is faster, more time-saving, labor-saving and improves assembly quality.

[0006] The technical solution adopted in this invention is as follows:

[0007] An anti-misinsertion identification pin installation tool includes a spring fixing cap, a compression cylinder, and a connecting nut connected in sequence. The compression cylinder contains an upper cylinder, a pressure release bevel, and a lower cylinder arranged in sequence. A compression spring is connected inside the spring fixing cap, with the other end of the compression spring extending into the compression cylinder and connected to a punch. The punch has a blind hole, and a secondary spring and a steel ball are arranged inside the blind hole, with the steel ball contacting the inner wall of the compression cylinder.

[0008] The lower cylinder of the compression cylinder is fitted with a telescopic cylinder. A thrust slip ring is provided at one end of the telescopic cylinder that extends into the compression cylinder. A blocking step for limiting the thrust slip ring is provided inside the connecting nut. The telescopic cylinder is provided with a telescopic cavity and an inner cavity in sequence. A limiting step is provided between the telescopic cavity and the inner cavity. An impact sleeve is provided inside the telescopic cylinder. The impact sleeve includes an impact sleeve body and a boss. A retaining ring is provided between the impact sleeve body and the boss. The retaining ring cooperates with the limiting step.

[0009] The impact sleeve has interconnected stepped holes and countersunk holes inside, and an impact head is installed in the countersunk hole. One end of the impact head has an upper cavity inside, in which a primary spring and a positioning pin are installed. The other end of the positioning pin passes through the stepped hole. The other end of the impact head has a spring fixing shaft. A return spring is connected between the spring fixing shaft and the punch. A striking pin is installed on the side of the spring fixing shaft near the punch.

[0010] During installation, hold the compression cylinder of the tool and insert the positioning pin into the recess of the anti-misfit identification pin. Press the tool vertically downwards until the positioning pin contacts the lower plane of the identification pin. The primary spring contracts, generating pre-pressure on the lower plane of the identification pin. As the tool continues downwards, the upper plane of the identification pin contacts the impact surface of the impact sleeve, ensuring that both the upper and lower planes of the identification pin are evenly stressed. During the downward press, the exposed boss of the impact sleeve contracts and enters the inner cavity of the telescopic cylinder, along with the upper part of the anti-misfit identification pin. The return spring also contracts, and the compression cylinder, through the return spring, drives the telescopic cylinder to continue downwards until it contacts the connector housing. At this point, the anti-misfit identification pin is completely confined within the inner cavity of the telescopic cylinder. Continuing to press down the compression cylinder, the connector housing generates a reverse thrust, causing the telescopic cylinder to slide upwards along the lower cylinder of the compression cylinder until it contacts the steel ball on the punch. The secondary spring, located in the blind hole, generates a thrust on the steel ball, keeping the center of the steel ball at the orifice of the punch. The annular surface on the thrust slip ring pushes the steel ball upwards. Driven by the steel ball, the upper part of the punch, which is located in the telescopic cylinder hole, moves upward. The compression spring, which is connected to the arc-shaped retaining ring of the punch and the spring fixing cap, contracts to generate preload.

[0011] When the steel ball mounted on the punch slides to the pressure release angle, the ball enters the blind hole under the thrust of the angle. The punch at the orifice of the telescopic cylinder loses its obstruction, the compression spring tension is released, and the instantaneous compression return spring strikes the impact head. The primary spring in the upper cavity of the impact head contracts, causing the positioning pin to apply pressure to the identification pin recess. The impact head transmits the force through the bottom plane of the impact sleeve, causing the impact sleeve and positioning pin to knock the anti-misalignment identification pin into the keyway. Removing the tool extends the return spring, pushing the impact sleeve and telescopic cylinder back to their original positions. The telescopic cylinder returns to its initial position, and the steel ball returns to its original position, completing the assembly.

[0012] This invention eliminates the need for both hands to hold tools and press, allowing for easy assembly with just one hand, thus increasing work efficiency. The invention utilizes the instantaneous impact force of a spring to drive in the identification pin, reducing effort and effectively preventing the PCB motherboard from bending or deforming during forceful pressing. During installation, the anti-misinsertion identification pin receives even pressure at multiple points, preventing misalignment and resulting in a higher success rate compared to manual pressing.

[0013] As a preferred embodiment of the present invention, the upper cylinder of the compression cylinder is threadedly connected to the spring fixing cap, and the lower cylinder of the compression cylinder is threadedly connected to the connecting nut.

[0014] In a preferred embodiment of the present invention, the gap between the outer circle of the punch and the inner wall of the lower cylinder of the compression cylinder is 1 / 2 the diameter of the steel ball. The center of the steel ball can be kept at the orifice position of the punch, and the steel ball will not be pressed into the blind hole before the annular surface of the thrust slip ring pushes the steel ball to the contact pressure release angle. Furthermore, when the steel ball contacts the contact pressure release angle, the steel ball can be smoothly pressed into the blind hole.

[0015] In a preferred embodiment of the present invention, one end of the punch is provided with an arc-shaped retaining ring, which is connected to a compression spring. The diameter of the arc-shaped retaining ring is slightly larger than the inner diameter of the compression spring. After the first turn of the compression spring is engaged with the retaining ring, the punch remains tightly engaged with the compression spring during movement and will not fall off.

[0016] In a preferred embodiment of the present invention, the section of the thrust slip ring near the steel ball has a conical surface. When the annular surface of the thrust slip ring pushes the steel ball to the pressure release angle position, the conical surface on the thrust slip ring can move a certain distance along the pressure release angle to push the steel ball to a position close to the upper cylinder of the compression cylinder, ensuring that the steel ball passes through the pressure release angle and is completely pressed into the blind hole. After the steel ball is completely pressed into the blind hole, the punch located at the orifice of the telescopic cylinder will lose its obstruction, ensuring that the tension of the compression spring is released.

[0017] As a preferred embodiment of the present invention, the end of the thrust slip ring away from the steel ball is provided with a relief groove for eliminating the gap between the blocking step and the thrust slip ring.

[0018] As a preferred embodiment of the present invention, the section of the telescopic cylinder away from the spring fixing cap is flat to avoid interference with the connector housing during installation.

[0019] In a preferred embodiment of the present invention, the inner cavity of the telescopic cylinder is rectangular, and the boss of the impact sleeve is rectangular; the corners of the inner cavity are rounded, and the edges of the inner cavity are provided with guide bevels. The rectangular shape of the inner cavity with rounded edges ensures that the assembled anti-misinsertion identification pin can be smoothly inserted into the inner cavity regardless of its orientation. The guide bevels prevent interference during pin insertion.

[0020] In a preferred embodiment of the present invention, the number of the stepped hole, the upper cavity, the primary spring, and the positioning pin are all two.

[0021] In a preferred embodiment of the present invention, the impact head is provided with a guide ring, which cooperates with the telescopic cavity of the telescopic cylinder. The guide ring enables the impact head to remain coaxial with the telescopic cylinder during its movement.

[0022] The beneficial effects of this invention are as follows:

[0023] This invention eliminates the need for both hands to hold tools and press, allowing for easy assembly with just one hand, thus increasing work efficiency. The invention utilizes the instantaneous impact force of a spring to drive in the identification pin, reducing effort and effectively preventing the PCB motherboard from bending or deforming during forceful pressing. During installation, the anti-misinsertion identification pin receives even pressure at multiple points, preventing misalignment and resulting in a higher success rate compared to manual pressing. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention;

[0026] Figure 3 This is a structural diagram of an LRM connector;

[0027] Figure 4 This is a schematic diagram of the installation of the anti-misinsertion identification pin;

[0028] Figure 5 This is a schematic diagram of the compression cylinder;

[0029] Figure 6 This is a structural diagram of the telescopic cylinder;

[0030] Figure 7 This is a cross-sectional view of the telescopic cylinder;

[0031] Figure 8 This is a schematic diagram of the impact sleeve.

[0032] Figure 9 This is a cross-sectional view of the impact sleeve;

[0033] Figure 10 This is a schematic diagram of the impact head;

[0034] Figure 11 This is a schematic diagram of the punch structure;

[0035] Figure 12 This is an exploded view of the present invention.

[0036] In the diagram: 1-Compression cylinder; 2-Connecting nut; 3-Telescopic cylinder; 4-Impact sleeve; 5-Spring retaining cap; 6-Positioning pin; 7-Primary spring; 8-Impact head; 9-Reset spring; 10-Secondary spring; 11-Pressure release angle; 1a-Internal thread; 1b-External thread; 1c-Upper cylinder; 1d-Lower cylinder; 12-Punch; 12a-Blind hole; 12b-Snap ring; 13-Compression spring; 14-Anti-misinsertion identification pin; 15-Steel ball; 16-Connector outer... Shell; 17-Fixing ring; 21-Blocking step; 31-Flat surface; 32-Inner cavity; 33-Thrust slip ring; 34-Conical surface; 35-Relief groove; 36-Guide angle; 37-Limiting step; 38-Annular surface; 39-Telescopic cavity; 41-Stepped hole; 42-Impact surface; 43-Retaining ring; 44-Boss; 45-Bottom plane; 46-Counterhole; 47-Impact sleeve body; 81-Upper cavity; 82-Spring fixing shaft; 83-Ejector pin; 84-Guide ring. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the invention can be combined with each other.

[0039] like Figures 1-12As shown, the anti-misinsertion identification pin 14 installation tool of this embodiment includes a spring fixing cap 5, a compression cylinder 1 and a connecting nut 2 connected in sequence. The compression cylinder 1 is provided with an upper cylinder 1c, a pressure release angle 11 and a lower cylinder 1d in sequence. A compression spring 13 is connected inside the spring fixing cap 5. The other end of the compression spring 13 extends into the compression cylinder 1 and is connected to a punch 12. A blind hole 12a is provided on the punch 12. A secondary spring 10 and a steel ball 15 are provided inside the blind hole 12a. The steel ball 15 is in contact with the inner wall of the compression cylinder 1.

[0040] The upper cylinder 1c of the compression cylinder 1 has an internal thread 1a that connects to the spring fixing cap 5, and the lower cylinder 1d of the compression cylinder 1 has an external thread 1b that connects to the connecting nut 2.

[0041] The compression spring 13 passes axially through the upper cylinder 1c and lower cylinder 1d of the compression cylinder 1 and is connected to the spring fixing cap 5. The inner cavity 32 of the spring fixing cap 5 is slightly smaller than the diameter of the compression spring 13. The tension after the spring is compressed secures one end of the compression spring 13 in the spring fixing cap 5, and the other end of the compression spring 13 is connected to the punch 12. The gap between the outer circle of the punch 12 and the inner wall of the lower cylinder 1d of the compression cylinder 1 is 1 / 2 the diameter of the steel ball 15. The center of the steel ball 15 can be kept at the orifice position of the punch 12. Before the annular surface 38 of the thrust slip ring 33 pushes the steel ball 15 to the contact pressure release angle 11, the steel ball 15 will not be pressed into the blind hole 12a. Furthermore, when the steel ball 15 contacts the pressure release angle 11, the steel ball 15 can be smoothly pressed into the blind hole 12a.

[0042] One end of the punch 12 is provided with an arc-shaped retaining ring 12b, which is connected to the compression spring 13. The diameter of the arc-shaped retaining ring 12b is slightly larger than the inner diameter of the compression spring 13. After the first turn of the compression spring 13 is engaged with the retaining ring 12b, the punch 12 will remain tightly engaged with the compression spring 13 during operation and will not fall off.

[0043] The lower cylinder 1d of the compression cylinder 1 is fitted with a telescopic cylinder 3. One end of the telescopic cylinder 3 that extends into the compression cylinder 1 is provided with a thrust slip ring 33. The connecting nut 2 is provided with a blocking step 21 for limiting the thrust slip ring 33. The telescopic cylinder 3 is provided with a telescopic cavity 39 and an inner cavity 32 in sequence. A limiting step 37 is provided between the telescopic cavity 39 and the inner cavity 32. An impact sleeve 4 is provided inside the telescopic cylinder 3. The impact sleeve 4 includes an impact sleeve body 47 and a boss 44. A retaining ring 43 is provided between the impact sleeve body 47 and the boss 44. The retaining ring 43 cooperates with the limiting step 37.

[0044] The thrust slip ring 33 has a conical surface 34 near the steel ball 15. When the annular surface 38 of the thrust slip ring 33 pushes the steel ball 15 to the pressure release angle 11, the conical surface 34 on the thrust slip ring 33 can move a certain distance along the pressure release angle 11 to push the steel ball 15 to a position close to the upper cylinder 1c of the compression cylinder 1, so that the steel ball 15 passes through the pressure release angle 11, ensuring that the steel ball 15 can be completely pressed into the blind hole 12a. After the steel ball 15 is completely pressed into the blind hole 12a, the punch 12 set at the orifice of the telescopic cylinder 3 will lose its obstruction, ensuring that the tension of the compression spring 13 is released.

[0045] The end of the thrust slip ring 33 away from the steel ball 15 is provided with a relief groove 35 for eliminating the gap between the blocking step 21 and the thrust slip ring 33.

[0046] The connecting nut 2 is inserted into the telescopic cylinder 3 from the tail end and connected to the external thread 1b of the compression cylinder 1. Since the diameter of the thrust slip ring 33 is larger than the through hole of the connecting nut 2, the connecting nut 2 can limit the thrust slip ring 33 through the internal blocking step 21. Because the telescopic cylinder 3 with the limiting function will not come out of the compression cylinder 1, the upper half of the telescopic cylinder 3 can axially extend and retract within the lower cylinder 1d of the compression cylinder 1.

[0047] The impact sleeve 4 has a stepped hole 41 and a countersunk hole 46 that are interconnected inside. An impact head 8 is installed in the countersunk hole 46. An upper cavity 81 is provided inside one end of the impact head 8. A first-stage spring 7 and a positioning pin 6 are installed in the upper cavity 81. The other end of the positioning pin 6 passes through the stepped hole 41. A spring fixing shaft is provided at the other end of the impact head 8. A return spring 9 is connected between the spring fixing shaft and the punch 12. A striking pin 83 is provided on the side of the spring fixing shaft near the punch 12.

[0048] The section of the telescopic cylinder 3 away from the spring fixing cap 5 is flat to avoid interference with the connector housing 16 during installation.

[0049] The inner cavity 32 of the telescopic cylinder 3 is rectangular, and the boss 44 of the impact sleeve 4 is also rectangular. The corners of the inner cavity 32 are rounded, and the edges of the inner cavity 32 are provided with guide bevels 36. Because the inner cavity 32 is rectangular and has rounded edges, the assembled anti-misinsertion identification pin 14 can be smoothly inserted into the inner cavity 32 regardless of its orientation. The guide bevel 36 prevents interference during pin insertion.

[0050] The number of the stepped hole 41, the upper cavity 81, the primary spring 7, and the positioning pin 6 are all two.

[0051] The impact head 8 is provided with a guide ring 84, which cooperates with the telescopic cavity 39 of the telescopic cylinder 3. The guide ring 84 enables the impact head 8 to remain coaxial with the telescopic cylinder 3 during movement.

[0052] Work process:

[0053] During installation, hold the compression cylinder 1 of the tool and insert the positioning pin 6 into the recess of the anti-misfit identification pin 14. Press the tool vertically downwards until the positioning pin 6 contacts the lower surface of the identification pin. The first-stage spring 7 contracts, generating pre-pressure on the lower surface of the identification pin. As the tool continues to descend, the upper surface of the identification pin contacts the impact surface 42 of the impact sleeve 4, ensuring that both the upper and lower surfaces of the identification pin are evenly stressed. During the downward press, the exposed boss 44 of the impact sleeve 4 contracts and enters the inner cavity 32 of the telescopic cylinder 3. The upper part of the anti-misfit identification pin 14 also enters the inner cavity 32 along with it. The return spring 9 also contracts, and the compression cylinder 1, through the return spring 9, drives the telescopic cylinder 3 to continue descending and contact the connector housing 16. At this point, the anti-misfit identification pin 14 is completely confined within the inner cavity 32 of the telescopic cylinder 3. As the compression cylinder 1 continues to be pressed down, the connector housing 16 generates a reverse thrust, causing the telescopic cylinder 3 to slide upwards along the lower cylinder 1d of the compression cylinder 1, contacting the steel ball 15 on the punch 12. The secondary spring 10, located in the blind hole 12a, exerts a thrust on the steel ball 15, keeping the center of the steel ball 15 at the opening of the punch 12. The annular surface 38 on the thrust slip ring 33 pushes the steel ball 15 upwards. Driven by the steel ball 15, the upper part of the punch 12, located in the hole of the telescopic cylinder 3, moves upwards accordingly. The compression spring 13, connected to the spring fixing cap 5 and the arc-shaped retaining ring 12b installed on the punch 12, contracts to generate preload.

[0054] When the steel ball 15 mounted on the punch 12 slides to the pressure release angle 11, under the thrust of the angle, the steel ball 15 enters the blind hole 12a. The punch 12, located at the orifice of the telescopic cylinder 3, loses its obstruction, the tension of the compression spring 13 is released, and the instantaneous compression return spring 9 strikes the impact head 8. The primary spring 7 located in the upper cavity 81 of the impact head 8 contracts, causing the positioning pin 6 to apply pressure to the identification pin recess. The impact head 8 transmits the force through the bottom plane 45 of the impact sleeve 4, causing the impact sleeve 4 and the positioning pin 6 to knock the anti-misinsertion identification pin 14 into the keyway. The tool is removed, the return spring 9 extends, pushing the impact sleeve 4 and the telescopic cylinder 3 to reset. The telescopic cylinder 3 returns to its initial position, and the steel ball 15 resets accordingly, completing the assembly.

[0055] This invention eliminates the need for both hands to hold and press the tool, allowing for easy assembly with just one hand, resulting in higher work efficiency.

[0056] This invention uses the instantaneous impact force of a spring to drive in the identification pin, making it easier to insert and effectively preventing the PCB motherboard from bending and deforming during forceful pressing.

[0057] During installation, the anti-misinsertion identification pin 14 is evenly stressed at multiple points, making it less prone to tilting and resulting in a higher success rate compared to manual pressing.

[0058] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A mistake proofing key identification pin installation tool, characterized by: The utility model provides a spring fixing cap (5), compression cylinder (1) and connecting nut (2) are connected in sequence, and the compression cylinder (1) is provided with upper cylinder (1c), pressure release bevel (11) and lower cylinder (1d) in sequence in it;Spring fixing cap (5) is connected with compression spring (13) in it, and the other end of compression spring (13) reaches into compression cylinder (1), and the other end of compression spring (13) is connected with punch (12);Blind hole (12a) is provided on punch (12), and two-stage spring (10) and steel ball (15) are provided in blind hole (12a), and steel ball (15) is in contact with compression cylinder (1) inner wall; The lower cylinder (1d) of the compression cylinder (1) is sleeved with the telescopic cylinder (3), the telescopic cylinder (3) is provided with a thrust sliding ring (33) at one end extending into the compression cylinder (1), and the connecting nut (2) is provided with a blocking step (21) for limiting the thrust sliding ring (33); The telescopic cylinder (3) is provided with a telescopic cavity (39) and an inner cavity (32) in sequence, and a limiting step (37) is arranged between the telescopic cavity (39) and the inner cavity (32); The telescopic cylinder (3) is provided with an impact sleeve (4), and the impact sleeve (4) comprises an impact sleeve body (47) and a boss (44), a retainer ring (43) is arranged between the impact sleeve body (47) and the boss (44), and the retainer ring (43) is matched with the limiting step (37). The impact sleeve (4) is provided with a stepped hole (41) and a counterbore (46) penetrating each other inside, and a striking head (8) is installed in the counterbore (46); One end of the striking head (8) is provided with an upper cavity (81) inside, a first-stage spring (7) and a positioning needle (6) are installed in the upper cavity (81), the other end of the positioning needle (6) penetrates the stepped hole (41), the other end of the striking head (8) is provided with a spring fixing shaft (82), a return spring (9) is connected between the spring fixing shaft (82) and the punch (12), and a striker (83) is arranged on the side of the spring fixing shaft (82) close to the punch (12).

2. A mistake proofing pin identification tool as defined in claim 1, wherein: The upper cylinder (1c) of the compression cylinder (1) is threadedly connected with the spring fixing cap (5), and the lower cylinder (1d) of the compression cylinder (1) is threadedly connected with the connecting nut (2).

3. The mistake proofing dowel pin installation tool of claim 1, wherein: The gap between the outer circle of the punch (12) and the inner wall of the lower cylinder (1d) of the compression cylinder (1) is 1 / 2 of the diameter of the steel ball (15).

4. The mistake proofing dowel installation tool of claim 1, wherein: One end of the punch (12) is provided with an arc-shaped snap ring (12b), and the arc-shaped snap ring (12b) is connected with the compression spring (13).

5. The mistake proofing dowel pin installation tool of claim 1, wherein: A conical surface (34) is formed on the section of the thrust sliding ring (33) close to the steel ball (15).

6. A mistake proofing pin identification tool as defined in claim 1, wherein: A relief groove (35) is formed on the end of the thrust sliding ring (33) away from the steel ball (15) to eliminate the gap between the blocking step (21) and the thrust sliding ring (33).

7. The mistake proofing dowel pin installation tool of claim 1, wherein: The section of the telescopic cylinder (3) away from the spring fixing cap (5) is flat.

8. The mistake proofing dowel pin installation tool of claim 1, wherein: The inner cavity (32) of the telescopic cylinder (3) is rectangular in shape, and the boss (44) of the impact sleeve (4) is rectangular in shape; The corners of the inner cavity (32) are circularly transitioned, and a guide bevel (36) is formed on the edge of the inner cavity (32).

9. The mistake proofing dowel pin installation tool of claim 1, wherein: The number of the stepped holes (41), the upper cavities (81), the primary springs (7) and the positioning needles (6) is two.

10. The mistake proofing dowel pin installation tool of claim 1, wherein: The impact head (8) is provided with a guide ring (84), and the guide ring (84) is matched with the telescopic cavity (39) of the telescopic barrel (3).

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