A testing device for automotive fastener bolts

Abstract

This utility model discloses a testing device for automotive fastener bolts, including a first testing component and a second testing component. The first and second testing components share a common threaded post, with two threaded posts arranged symmetrically from left to right. The inner cavity of the first testing component has two clamping blocks. This utility model provides a testing device for automotive fastener bolts that overcomes the limitations of traditional fixed-size clamping devices. It adopts a flexibly adjustable clamping structure, enabling adaptive adjustment according to bolts of different sizes, enhancing adaptability to various bolt specifications, and improving testing stability. It solves the problem mentioned in the background art where fixed-size clamping devices cannot properly adapt to different bolt sizes, leading to bolt misalignment and wobbling during testing, and potentially causing the bolt head to break off during testing, posing a safety hazard.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts testing technology, specifically a testing device for automotive fastener bolts. Background Technology

[0002] A patent application (CN202322328826.8) discloses a bolt testing device for automotive fasteners, comprising a testing box, a vibrating plate, and a fixing plate. The testing box has first sliding components installed at both ends, with a vibrating plate slidably mounted inside each component. A vibration motor is installed at one end of the top of the vibrating plate, and openings are provided at both ends of the top. A U-shaped plate is installed at the bottom of the vibrating plate, with a second electric telescopic rod installed at the middle of the bottom of the U-shaped plate. Third sliding components are installed at both ends of the top of the U-shaped plate, with a sliding plate slidably mounted on the top of each component. This invention includes a standard nut, a turntable, a rotating shaft, and a servo motor. In use, the servo motor drives the turntable to rotate via the rotating shaft, which in turn drives the standard nut to rotate, allowing the standard nut to be threaded onto the bolt to be tested, thus enabling the testing of the tightening effect of the bolt's outer threads.

[0003] In the prior art, including the aforementioned patents, existing equipment performs tensile testing on bolts by clamping the bolts with a clamp before tensile testing. However, due to the different sizes of bolts, the fixed-size clamping device cannot be well adapted to bolts of different sizes. During the testing process, bolt misalignment and shaking may occur, and the bolt body may easily break off during the testing process, posing a certain safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide a testing device for automotive fastener bolts, in order to solve the problems mentioned in the background art, such as bolts of different sizes, where fixed-size clamping parts cannot be well adapted to bolts of different sizes, bolt misalignment and shaking occur during the testing process, and the bolt head is very likely to break off during the testing process, posing certain safety hazards.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A testing device for automotive fastener bolts includes a first testing component and a second testing component. The first and second testing components share a common threaded post, with two threaded posts arranged symmetrically. The first testing component has two clamping blocks within its inner cavity. Each clamping block has two hydraulic rods connected to one end. A telescopic rod is slidably connected to one side of each clamping block. One end of the telescopic rod has a clamping clamp that engages with the bolt, and the other end has a movable plug. The first testing component contains a pneumatic linkage assembly that engages with the movable plug. The input end of the pneumatic linkage assembly has a pressure cylinder, and the output end has a constant pressure relief valve. The second testing component has a placement groove on one side, containing a detachable fixing block threaded to the bolt. Two symmetrically arranged clamps are hinged within the second testing component. An opening on one side of the second testing component contains a pin that engages with the clamps.

[0007] Furthermore, one side of the clamp is open, and the inner wall of the open clamp is provided with multiple anti-slip grooves. Both sides of the clamp are provided with sliders, which are slidably connected to the inner wall of the clamping block.

[0008] Furthermore, one end of the pressure cylinder is provided with a first one-way valve and a one-way air intake valve, and a first steel conduit is inserted into the inner cavity of the pressure cylinder. One end of the first steel conduit is provided with a pressure plug, and the other end of the first steel conduit is connected to the inner cavity of the clamping block.

[0009] Furthermore, one end of the constant pressure relief valve is connected to a second steel conduit, and the other end of the second steel conduit is connected to the inner cavity of the clamping block.

[0010] Furthermore, one end of each of the two calipers is connected to a spring, and the other end of the spring is connected to the inner wall of the second detection component. One end of each of the two calipers is set with a pointed tip, and the pointed tip of the caliper abuts against the side wall of the bolt.

[0011] Furthermore, the bottom of the second detection element is provided with an adjustment device, and the two pins are adjustablely mounted on the adjustment device.

[0012] Furthermore, the two hydraulic rods are symmetrically arranged on the inner sidewall of the first detection element.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the detection device for automotive fastener bolts is reasonable and has the following advantages:

[0014] (1) This testing device, through innovative design, abandons the limitations of traditional fixed-size clamping parts and adopts a flexible adjustable clamping structure, which can adaptively adjust according to bolts of different sizes, enhances the adaptability to bolts of various specifications, and improves the stability of testing.

[0015] (2) During the inspection process, it can effectively avoid the deviation and shaking caused by the mismatch of bolt size, fundamentally eliminate the safety hazard of the broken bolt popping out, and provide a stable and safe operating environment for the inspection work; through the pressure control of the pneumatic linkage component, it can ensure the stability of the bolt during the inspection and the safety of the inspection process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the clamping pliers structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the caliper structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the planar structure of this utility model;

[0020] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.

[0021] Figure 6 for Figure 4 Enlarged structural diagram at point B.

[0022] In the diagram: 1. First inspection component; 11. Clamping block; 12. Hydraulic rod; 13. Telescopic rod; 14. Clamping clamp; 15. Movable plug; 2. Second inspection component; 21. Fixing screw block; 22. Caliper; 221. Spring; 23. Pin; 24. Adjustment device; 3. Threaded column; 4. Pneumatic linkage assembly; 41. Pressure cylinder; 411. One-way air inlet valve; 412. First steel conduit; 413. Pneumatic plug; 42. Constant pressure relief valve; 421. Second steel conduit. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6The present invention provides a technical solution as follows:

[0025] A testing device for automotive fastener bolts includes a first testing element 1 and a second testing element 2. The first testing element 1 and the second testing element 2 share a common threaded connection with two threaded posts 3, arranged symmetrically. The inner cavity of the first testing element 1 has two clamping blocks 11, each with two hydraulic rods 12 connected to one end. A telescopic rod 13 is slidably connected to one side of each clamping block 11. One end of the telescopic rod 13 has a clamping clamp 14 that mates with the bolt, and the other end has a movable plug 15. The first testing element 1 contains a pneumatic linkage assembly 4 that mates with the movable plug 15. The input end of the pneumatic linkage assembly 4 has a pressure cylinder 41, and the output end has a constant pressure relief valve 42. The second testing element 2 has a placement groove on one side, containing a detachable fixing bolt 21. The fixed screw block 21 is threadedly connected to the bolt. Two symmetrically arranged clamps 22 are hinged inside the second detection piece 2. An opening is provided on one side of the second detection piece 2, and a pin 23 that cooperates with the clamps 22 is provided in the opening. Through the cooperation of the first detection piece 1, the second detection piece 2, and the threaded post 3, the basic framework for fixing both ends of the bolt and subsequent detection operations is realized. The clamping block 11, hydraulic rod 12, telescopic rod 13, clamping clamp 14, movable plug 15, and pneumatic linkage component 4 form a multi-link bolt clamping system that can ensure stable clamping of the bolt. The detachable fixed screw block 21 facilitates the replacement of bolts of different specifications for testing. The design of the clamps 22 and pins 23 plays a safety protection role during the bolt tensioning process, preventing the bolt from falling off or breaking off, thus improving the overall functionality and safety of the testing equipment.

[0026] In this embodiment, one side of the clamping pliers 14 is open, and the inner wall of the open clamping pliers 14 is provided with multiple anti-slip grooves. Both sides of the clamping pliers 14 are provided with sliders, which are slidably connected to the inner wall of the clamping block 11. The open shape facilitates the placement and removal of bolts, and the anti-slip grooves increase the friction between the clamping pliers 14 and the bolts, making the clamping more secure and preventing the bolts from slipping during the inspection process. The sliding connection between the sliders and the inner wall of the clamping block 11 ensures the stability of the clamping pliers 14 during the extension and retraction process, and improves the accuracy and reliability of the clamping action.

[0027] In this embodiment, a first one-way valve 411 is provided at one end of the pressure cylinder 41, and a first steel conduit 412 is inserted into the inner cavity of the pressure cylinder 41. A pressure plug 413 is provided at one end of the first steel conduit 412, and the other end of the first steel conduit 412 is connected to the inner cavity of the clamping block 11. The one-way valve 411 ensures that gas can only enter the pressure cylinder 41 in one direction, so that the internal pressure of the pressure cylinder 41 can be effectively accumulated. The communication structure between the first steel conduit 412, the pressure plug 413 and the inner cavity of the clamping block 11 realizes the transmission of pressure from the pressure cylinder 41 to the inner cavity of the clamping block 11, thereby pushing the movable plug 15 to move, driving the telescopic rod 13 and the clamping clamp 14 to clamp the nut, forming a stable pneumatic driving clamping mechanism.

[0028] In this embodiment, one end of the constant pressure relief valve 42 is connected to a second steel conduit 421, and the other end of the second steel conduit 421 is connected to the inner cavity of the clamping block 11. The connection between the constant pressure relief valve 42 and the second steel conduit 421 can promptly release excessive air pressure when the pressure in the inner cavity of the clamping block 11 reaches a preset value, effectively avoiding equipment damage or safety hazards caused by excessive pressure, ensuring the stable operation of the entire pneumatic drive clamping system, and ensuring the safety and reliability of the detection process.

[0029] In this embodiment, one end of each of the two clamps 22 is connected to a spring 221, and the other end of the spring 221 is connected to the inner cavity sidewall of the second detection element 2. One end of each clamp 22 is set with a pointed tip, and the pointed tip of the clamp 22 abuts against the sidewall of the bolt. The setting of the spring 221 enables the clamp 22 to maintain a certain clamping force on the bolt when no external force is applied, which can initially fix the bolt. The pointed end of the clamp 22 abuts against the sidewall of the bolt, which increases the contact area between the clamp 22 and the bolt, improves the stability of clamping, further prevents the bolt from falling off during the bolt stretching process, and improves the safety of the detection process.

[0030] In this embodiment, the bottom of the second detection component 2 is provided with an adjustment device 24, and two pins 23 are adjustablely mounted on the adjustment device 24. The adjustment device 24 can flexibly adjust the position of the pins 23 according to the length, diameter and other parameters of different bolts, so that the caliper 22 can clamp the bolt at the appropriate time, which improves the adaptability of the detection device to bolts of different specifications and enhances the versatility and practicality of the device.

[0031] In this embodiment, two hydraulic rods 12 are symmetrically arranged on the inner sidewall of the first detection component 1. The symmetrically arranged hydraulic rods 12 can provide a balanced thrust to the two clamping blocks 11, ensuring the stability of the clamping blocks 11 during movement, thereby ensuring the accuracy and stability of the clamping clamp 14 in clamping the bolt, and improving the reliability of the bolt clamping operation in the entire detection process.

[0032] Working principle: When in use, first place one end of the bolt cap inside the first detection piece 1, start the hydraulic rod 12, and push the two clamping blocks 11 to clamp one end of the bolt through the hydraulic rod 12;

[0033] It should be noted that when the two clamping blocks 11 clamp one end of the nut, the movement of the clamping blocks 11 causes the first steel conduit 412 and the air pressure plug 413 to move in the inner cavity of the pressure cylinder 41. With the one-way air intake mechanism of the one-way air intake valve 411, the pressure inside the pressure cylinder 41 will increase as the gas cannot be discharged from the pressure cylinder 41. The gas will be transported to the inner cavity of the clamping block 11 through the inner cavity of the first steel conduit 412 and push the movable plug 15 to move. The movable plug 15 drives the telescopic rod 13 and the clamping clamp 14 to clamp the nut.

[0034] The function of the constant pressure relief valve 42 is: when the pressure inside the clamping block 11 reaches the pressure value preset by the constant pressure relief valve 42, the air pressure inside the clamping block 11 is discharged through the constant pressure relief valve 42 to avoid dangerous situations caused by excessive internal pressure of the clamping block 11, and to play the role of pressure value safety protection and ensuring internal pressure stability.

[0035] Next, thread the other end of the bolt into the fixing block 21, and then snap the fixing block 21 into the opening on the second test piece 2;

[0036] Then, the two threaded pins 3 are driven to rotate by the device. When the two threaded pins 3 rotate, they drive the first detection element 1 and the second detection element 2 to move in opposite directions and exert a pulling force on the bolt at both ends. During the process, when the second detection element 2 moves to the bottom, one end of the two pins 23 extends into the inner cavity of the second detection element 2 and abuts against one side of the clamp 22. When the second detection element 2 continues to move to the bottom, the pins 23 push the clamp 22 to clamp the bolt, so that the bolt remains stable during the stretching process, avoiding the bolt from falling off during the stretching process and the bolt from breaking at the moment of the stretching, thus improving the safety of the inspection process.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for detecting a bolt of an automotive fastener, comprising a first detection member (1) and a second detection member (2), characterized in that, The first detection piece (1) and the second detection piece (2) are connected by a common threaded post (3), and there are two threaded posts (3) arranged symmetrically on the left and right sides; the inner cavity of the first detection piece (1) is provided with two clamping blocks (11), and one end of each clamping block (11) is connected to two hydraulic rods (12). A telescopic rod (13) is slidably connected to one side of the clamping block (11), and one end of the telescopic rod (13) is provided with a clamping clamp (14) that cooperates with a bolt, and the other end of the telescopic rod (13) is provided with a movable plug (15); the first detection piece (1) is provided with a movable plug (15) that cooperates with a bolt. A pneumatic linkage assembly (4) is fitted with a plug (15). The input end of the pneumatic linkage assembly (4) is equipped with a pressure cylinder (41), and the output end of the pneumatic linkage assembly (4) is equipped with a constant pressure relief valve (42). A placement groove is provided on one side of the second detection piece (2). A detachable fixing screw block (21) is provided in the placement groove. The fixing screw block (21) is threadedly connected to a bolt. Two symmetrically arranged calipers (22) are hinged in the second detection piece (2). An opening is provided on one side of the second detection piece (2). A pin (23) that cooperates with the caliper (22) is provided in the opening.

2. The detection device for automotive fastener bolts according to claim 1, characterized in that: The clamp (14) has an open side and multiple anti-slip grooves on the inner wall of the open side. Both sides of the clamp (14) are provided with sliders, which are slidably connected to the inner wall of the clamping block (11).

3. The detection device for automotive fastener bolts according to claim 1, characterized in that: One end of the pressure cylinder (41) is provided with a first one-way valve and a one-way air inlet valve (411). A first steel conduit (412) is inserted into the inner cavity of the pressure cylinder (41). One end of the first steel conduit (412) is provided with a pressure plug (413). The other end of the first steel conduit (412) is connected to the inner cavity of the clamping block (11).

4. The detection device for automotive fastener bolts according to claim 1, characterized in that: One end of the constant pressure relief valve (42) is connected to a second steel conduit (421), and the other end of the second steel conduit (421) is connected to the inner cavity of the clamping block (11).

5. The detection device for automotive fastener bolts according to claim 1, characterized in that: One end of each of the two calipers (22) is connected to a spring (221), and the other end of the spring (221) is connected to the inner cavity sidewall of the second detection element (2). One end of each of the two calipers (22) is set with a pointed tip, and the pointed tip of the caliper (22) abuts against the sidewall of the bolt.

6. The detection device for automotive fastener bolts according to claim 1, characterized in that: The bottom of the second detection element (2) is provided with an adjustment device (24), and the two pins (23) are adjustablely set on the adjustment device (24).

7. The detection device for automotive fastener bolts according to claim 1, characterized in that: The two hydraulic rods (12) are symmetrically arranged on the inner sidewall of the first detection element (1).

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