A performance testing device for double-headed shock-absorbing bolts

Abstract

The present invention provides a performance testing device for double-headed shock-absorbing bolts, which belongs to the field of mechanical technology. It solves the problem of poor detection accuracy of existing testing devices. The performance testing device for double-headed shock-absorbing bolts includes a base, on which are provided a plurality of testing stations for placing the double-headed shock-absorbing bolts, the plurality of testing stations being arranged in a straight line, and a correction rod extending along the arrangement direction of the plurality of testing stations being provided on the base. The correction rod can swing downward relative to the base and correct the double-headed shock-absorbing bolts on each testing station so that each double-headed shock-absorbing bolt is arranged in a straight line, and each testing station is provided with a corresponding stretching assembly for connecting with the screw parts at both ends of the double-headed shock-absorbing bolt. The detection device makes the positions of the double-headed shock-absorbing bolts remain consistent through correction and adjustment, and no offset occurs. Then, each stretching assembly drives the screw parts at both ends of the double-headed shock-absorbing bolt to move synchronously in opposite directions, and the detection accuracy is high.

Description

Technical Field

[0001] The invention belongs to the technical field of machinery and relates to a performance detection device for a double-headed shock-absorbing bolt. Background Art

[0002] Double-headed shock-absorbing bolts play a very important role in the installation of mechanical structures. They can not only improve the stability of the installation between mechanical structures, but also effectively reduce the vibration and noise of the entire mechanical structure after connection. Existing double-headed shock-absorbing bolts generally have hexagonal metal screws at both ends and a rubber body in the middle. In order to ensure the shock-absorbing effect, the middle rubber body has an inward concave annular groove, as shown in the attached Chinese patent application (application number: 202010344086.5). Figure 1 or this application Figure 10 As shown in .

[0003] For stud-end shock-absorbing bolts, the elastic fatigue strength of the rubber core directly determines their vibration and noise reduction effectiveness and is a key indicator for evaluating stud-end shock-absorbing bolt performance. Therefore, during the production process, to ensure product qualification, stud-end shock-absorbing bolts must be tested for performance before shipment.

[0004] Currently, there is no dedicated testing equipment for the performance of stud-end shock-absorbing bolts. Most tests are done manually, requiring an operator to grasp both ends of the stud-end shock-absorbing bolt and stretch it outward a certain distance to check whether the rubber body in the middle is damaged after being stretched and deformed. If no damage occurs, the bolt passes the test; otherwise, it fails. Because the specific stretching distance in manual testing is determined by the operator's experience, the test results of previous batches of products may vary due to operator error, resulting in poor test accuracy. Moreover, due to the increasing demand for these small connecting components, they are often produced in batches, requiring a large amount of labor and low work efficiency.

[0005] Although there are devices for testing the tensile strength of components on the market, such as the Chinese patent application (application number: 201720554317.9), which discloses a tensile testing fixture, if the fixture structure is used to test the performance of the double-headed shock-absorbing bolt, it is necessary to first place the two ends of the double-headed shock-absorbing bolt in the clamping device, and then use two adjusting screws to extend from both sides to tighten the screw portion of the double-headed shock-absorbing bolt to achieve clamping and fixing, and then use the tensile traction device to perform tensile testing. If the above-mentioned device is used to test the performance of the double-headed detection bolt, although the labor cost is reduced, the clamping device is used to clamp and fix the screw portion of the double-headed shock-absorbing bolt by tightening the adjusting screw. In this process, if the extension degree of the adjusting screws on both sides is not well controlled, for example, the tightening force of the adjusting screw on one side is greater than the tightening force on the other side, then the overall position of the double-headed shock-absorbing bolt will be deflected, which will affect the subsequent detection accuracy. At the same time, this clamping method is also very likely to damage the threads of the double-headed shock-absorbing bolt.

[0006] In order to avoid deflection and improve the accuracy of detection, the conventional practice in this field is that the operator always pays attention to the number of tightening turns of the adjusting screws when tightening the adjusting screws on both sides, and tries to keep the two sides consistent. This requires the operator to invest a lot of energy and affects work efficiency. Summary of the Invention

[0007] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a performance detection device for double-headed shock-absorbing bolts. The technical problem to be solved by the present invention is: how to solve the problem of poor detection accuracy in the existing technology.

[0008] The objectives of the present invention can be achieved through the following technical solutions: A performance testing device for double-headed shock-absorbing bolts, comprising a base, wherein the base is provided with a plurality of testing stations for placing the double-headed shock-absorbing bolts, and the characteristic is that the plurality of testing stations are arranged in a straight line, and the base is also provided with a correction rod extending along the arrangement direction of the plurality of testing stations, and the correction rod can swing downward relative to the base and correct the double-headed shock-absorbing bolts on each testing station so that each double-headed shock-absorbing bolt is arranged in a straight line, and each testing station is provided with a corresponding tensile component for connecting to the screw parts at both ends of the double-headed shock-absorbing bolt.

[0009] The double-headed shock-absorbing bolt generally includes a rubber body located in the middle and a screw part integrally connected to the two ends of the rubber body. There is a concave annular groove on the outer peripheral surface of the rubber body. When the detection device is working, the operator first places the double-headed shock-absorbing bolt to be detected on the detection station. Due to operational errors, the double-headed shock-absorbing bolts are prone to deviation when placed on the detection station and are difficult to maintain consistency, and cannot be guaranteed to be arranged in the same straight line. Then, the correction rod is swung downward to embed it into the annular groove of the rubber body of the double-headed shock-absorbing bolt, thereby correcting the position of the double-headed shock-absorbing bolts on each detection station so that they are in a straight line along the correction rod. Arrange, and at the same time, after the correction rod swings downward, it can press each double-headed shock-absorbing bolt on the detection station, that is, the position of each double-headed shock-absorbing bolt is kept stationary after correction, and then the correction rod is swung upward after being connected and fixed to both ends of each double-headed shock-absorbing bolt through the stretching component. The operation of the stretching component drives one of the screw parts of the shock-absorbing bolt to move away from the other screw part, so that the rubber body of the shock-absorbing bolt is stretched and deformed. After stretching to the set distance, the stretching component stops working, and the operator checks whether the rubber body is damaged after being stretched and deformed. If no damage occurs, it is qualified, otherwise it is unqualified. In other words, the present detection device arranges several detection stations in a straight line, and then uses a calibration rod to adjust the position of the stud-end shock-absorbing bolt before it is clamped and fixed. After calibration, the position of the individual stud-end shock-absorbing bolts themselves will not deviate, and their central axis will be perpendicular to the calibration rod. At the same time, the stud-end shock-absorbing bolts are arranged in a straight line along the calibration rod, and will not deviate. This ensures that the positions of the two ends of the stud-end shock-absorbing bolts will not shift after they are connected and fixed to the tensioning assembly, and they will remain consistent. Then, each tensioning assembly is operated to synchronously stretch the rubber body of each shock-absorbing bolt, ensuring that the stretching amplitude of the rubber body of each stud-end shock-absorbing bolt is consistent, avoiding detection errors caused by positional deviation and improving detection accuracy. Moreover, the detection of stud-end shock-absorbing bolts from different batches is based on the calibration rod, that is, the detection of stud-end shock-absorbing bolts from different batches is based on the same benchmark, avoiding errors and further ensuring high detection accuracy. At the same time, the present detection device can perform batch testing, making the entire operation relatively simple and efficient.

[0010] In the aforementioned performance testing device for stud-end shock-absorbing bolts, the base is provided with two opposing positioning seats, each of which is provided with a plurality of positioning slots for receiving the screw portion of the stud-end shock-absorbing bolt. The detection station is formed between the two corresponding positioning slots on the two positioning seats, and the opposing side surfaces of the two positioning seats are flat. The screw portions at both ends of the stud-end shock-absorbing bolt are inserted into the two positioning slots, and the rubber body is located between the two positioning seats. The downward swing of the correction rod can be inserted into the annular groove of the rubber body, so that the correction rod moves with it during the downward swing, causing it to abut and press against the side surface of one of the positioning seats. Since the side surface is flat, the position of each stud-end shock-absorbing bolt is adjusted so that it is arranged in a straight line along the correction rod, ensuring that the positions of the two ends of the stud-end shock-absorbing bolt are not offset after being connected and fixed to the tensioning assembly. The operation of the tensioning assembly drives one screw portion of the shock-absorbing bolt to move away from the other screw portion, thereby causing the rubber body of the shock-absorbing bolt to be stretched and deformed, avoiding detection errors caused by positional deviation and improving detection accuracy.

[0011] In the above-mentioned performance testing device for double-headed shock-absorbing bolts, the positioning seat is in the shape of a long strip, and one of the positioning seats is provided with two connecting frames, which are arranged near the two ends of the positioning seat. The positioning seat has a plurality of positioning slots located between the two connecting frames, and the two ends of the correction rod are rotatably connected to the two connecting frames via arc-shaped connecting plates. Through the above-mentioned arrangement, it is ensured that the correction rod can be embedded in the annular groove of the rubber body of each double-headed shock-absorbing bolt after swinging downward, and can drive each double-headed shock-absorbing bolt to move together and abut against the side of one of the positioning seats to achieve position correction, so that they are arranged in a straight line along the correction rod, and ensure that the positions of the two ends of the double-headed shock-absorbing bolt will not shift after being connected and fixed to the tensioning assembly. Then, the operation of the tensioning assembly drives one of the screw parts of the shock-absorbing bolt to move away from the other screw part, so that the rubber body of the shock-absorbing bolt is stretched and deformed, thereby avoiding detection errors caused by position deviation and improving the accuracy of detection.

[0012] In the aforementioned stud-end shock-absorbing bolt performance testing device, the tensioning assembly includes two positioning sleeves that can be threadedly connected to each end of the stud-end shock-absorbing bolt. The positioning sleeves are rotatably connected to the base, and one positioning sleeve can be moved relative to the base toward or away from the other positioning sleeve. The two positioning sleeves are grouped together to form the tensioning assembly. After the correction rod completes position correction and tightens each stud-end shock-absorbing bolt, the positioning sleeves are rotated so that the two positioning sleeves are threadedly connected to the screw portions at each end of the corresponding stud-end shock-absorbing bolt. The tensile performance test is then completed by controlling the movement of one of the positioning sleeves, ensuring high test accuracy. At the same time, the positioning sleeves are threadedly fixed to the stud-end shock-absorbing bolt, which is less likely to damage the stud-end shock-absorbing bolt's threads during the test process.

[0013] In the above-mentioned performance detection device of the double-headed shock-absorbing bolt, the positioning groove includes a positioning section and a limiting section. The depth and width of the positioning section are both smaller than the limiting section and a rest step is formed between the two. The positioning sleeve extends into the limiting section and can be threadedly connected to the screw portion of the double-headed shock-absorbing bolt by rotation. The end of the positioning sleeve can rest on the rest step. A driving member 1 is also provided on the base. The driving member 1 is connected to one of the positioning seats and can drive the positioning seat close to or away from the other positioning seat. The screw rods at both ends of the double-headed shock-absorbing bolt rest on the bottom wall of the positioning section and pass through the positioning section to extend into the limiting section. After the positioning sleeve extends into the limiting section, it can be screwed and fixed with the screw rod of the double-headed shock-absorbing bolt by rotation. At the same time, the end of the positioning head can rest on the rest step. After the driving part drives the corresponding positioning seat away from the other positioning seat, the positioning seat can drive the positioning sleeve to move synchronously. The positioning sleeve drives one of the screw rods of the shock-absorbing bolt to move away from the other screw rod, thereby causing the rubber body of the shock-absorbing bolt to be stretched and deformed, thereby realizing the performance detection of the double-headed shock-absorbing bolt. The entire detection process has good consistency and high detection accuracy.

[0014] In the aforementioned stud-end shock-absorbing bolt performance testing device, two mounting brackets are further fixed to the base, with two positioning seats located between the two mounting brackets. One end of the positioning sleeve extends into the limiting section, and the other end slides through the corresponding mounting bracket. A compression spring is also sheathed around the positioning sleeve, and under the action of the compression spring, the end of the positioning sleeve has a tendency to always move toward the step. Due to the provision of the compression spring, the positioning sleeve always has a tendency to move toward the step, so that after the positioning sleeve extends into the limiting section, it can always press against the screw portion of the stud-end shock-absorbing bolt, thereby enabling the positioning sleeve to be threadedly connected to the screw portion of the stud-end shock-absorbing bolt after rotation.

[0015] In the above-mentioned performance testing device for double-headed shock-absorbing bolts, a second driving member is also fixed to each mounting frame. The second driving member is connected to the corresponding positioning seat and can drive the corresponding positioning seat closer to or away from another positioning seat. After the correction rod swings downward to correct and tighten the position of each double-headed shock-absorbing bolt, the second driving member can respectively drive the corresponding positioning seats closer to each other, and further correct the position of each double-headed shock-absorbing bolt through the side of the two positioning seats, so that they are arranged in a straight line along the correction rod. At the same time, it can also achieve a tightening effect on the double-headed shock-absorbing bolt, preventing the double-headed shock-absorbing bolt from rotating, ensuring that the positioning sleeve can be smoothly screwed with the double-headed shock-absorbing bolt through rotation, and further ensuring the accuracy of the detection. Preferably, the first driving member and the second driving member are both cylinders.

[0016] In the above-mentioned performance detection device of the double-headed shock-absorbing bolt, the positioning sleeve includes a sleeve portion with an internal thread and a rod-shaped shaft portion, the outer diameter of the shaft portion is smaller than the outer diameter of the sleeve portion, the sleeve portion extends into the limiting section, the shaft portion is slidably passed through the mounting frame, the compression spring is sleeved on the shaft portion, one end of the compression spring is abutted against the mounting frame, and the other end is abutted against the sleeve portion.

[0017] In the aforementioned performance testing device for stud-end shock-absorbing bolts, each shaft is sleeved with a gear, and the shaft and the gear are circumferentially positioned. A third driver is fixed to each mounting bracket. A rack is connected to the driver, and the rack extends in the same direction as the positioning slot. The driver is capable of driving the rack back and forth along its length, and the rack meshes with the corresponding gear. The shaft and the gear are circumferentially positioned and can slide relative to each other axially. Through the action of the gear, the driver drives the rack back and forth, which in turn drives the positioning sleeve to rotate, thereby achieving a threaded connection with the stud-end shock-absorbing bolt. In this application, the driver is a cylinder.

[0018] In the aforementioned stud-end shock-absorbing bolt performance testing device, the mounting frame has a mounting slot extending along the distribution direction of the positioning slot. The shaft sequentially passes through the two side walls of the mounting slot and has an annular stop edge at the exit end. The gear is sleeved on the shaft and located within the mounting slot. The rack extends into the mounting slot and meshes with the corresponding gear. Both the gear and rack are positioned within the mounting slot, thereby limiting the position of the gear, preventing it from deviating with the positioning sleeve and ensuring that it always remains meshed with the rack.

[0019] In the performance testing device for the stud-headed shock-absorbing bolt, the correction rod is further provided with a handle, which makes operation more convenient.

[0020] Compared with the existing technology, the performance detection device of the double-headed shock-absorbing bolt has the following advantages:

[0021] 1. This detection device arranges several detection stations in a straight line, and then cooperates with the structural setting of the correction rod to correct and adjust the position of the double-headed shock-absorbing bolts before they are clamped and fixed, so that the positions of each double-headed shock-absorbing bolt are consistent, ensuring that the positions of the two ends of the double-headed shock-absorbing bolts will not shift after being screwed and fixed. Then, each stretching component drives the screw parts at both ends of the double-headed shock-absorbing bolt to move synchronously in opposite directions, and the detection accuracy is high.

[0022] 2. It can carry out batch testing, the whole operation is relatively simple and the work efficiency is high.

[0023] 3. The second driving member can respectively drive the corresponding positioning seats closer to each other, and further correct the position of each double-headed shock-absorbing bolt through the side of the two positioning seats so that they are located on the same straight line. At the same time, it can also achieve a tightening effect on the double-headed shock-absorbing bolt to prevent the double-headed shock-absorbing bolt from rotating, ensuring that the positioning sleeve can be smoothly screwed with the double-headed shock-absorbing bolt through rotation, further ensuring the accuracy of the detection.

[0024] 4. The positioning sleeve and the double-headed shock-absorbing bolt are screwed together, which makes it difficult to damage the threads of the double-headed shock-absorbing bolt during the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of the performance detection device of the double-headed shock-absorbing bolt.

[0026] Figure 2 This is the working state of the performance detection device of the double-headed shock-absorbing bolt Figure 1 .

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 This is the working state of the performance detection device of the double-headed shock-absorbing bolt Figure 2 .

[0029] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0030] Figure 6 It is a cross-sectional view of the performance detection device of the double-headed shock-absorbing bolt.

[0031] Figure 7 It is a three-dimensional structural diagram of the positioning seat.

[0032] Figure 8 It is a three-dimensional structural diagram of the positioning sleeve.

[0033] Figure 9 It is a partial structural diagram of the performance detection device of the double-headed shock-absorbing bolt.

[0034] Figure 10 It is a partial cross-sectional view of the performance detection device of the double-headed shock-absorbing bolt.

[0035] Figure 11 It is a three-dimensional structural diagram of an existing double-headed shock-absorbing bolt.

[0036] In the figure, 1. base; 2. positioning seat; 2a. detection station; 2a1. positioning groove; 2a1a. positioning section; 2a1b. limiting section; 2a1c. abutting step; 3. correction rod; 3a. handle; 4. stretching assembly; 4a. positioning sleeve; 4a1. sleeve portion; 4a2. shaft portion; 4a3. annular limiting stop edge; 5. connecting frame; 6. connecting plate; 7. driving member 1; 8. mounting frame; 8a. mounting groove; 9. compression spring; 10. driving member 2; 11. gear; 12. rack; 13. driving member 3; 14. double-headed shock-absorbing bolt; 14a. rubber body; 14a1. annular groove; 14b. screw portion. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0038] like Figure 11 As shown, the existing stud-head shock-absorbing bolt 14 generally includes a rubber body 14a located in the middle and a screw portion 14b integrally connected to both ends of the rubber body 14a. The outer peripheral surface of the rubber body 14a is provided with an inwardly concave annular groove 14a1.

[0039] like Figure 1-10 As shown, the performance testing device for the stud-end shock-absorbing bolt includes a base 1, two mounting brackets 8, two positioning brackets 2, and a plurality of tensioning components 4. The two mounting brackets 8 are fixed to the base 1, and the two positioning brackets 2 are located between the two mounting brackets 8 and are respectively arranged close to the two mounting brackets 8. The two positioning brackets 2 are arranged opposite to each other.

[0040] The positioning seat 2 is in the shape of a long strip, and each positioning seat 2 is provided with a plurality of positioning grooves 2a1 for the screw portion 14b on the stud shock-absorbing bolt 14 to be embedded. The plurality of positioning grooves 2a1 are distributed in a straight line along the length direction of the positioning seat 2. The two positioning grooves 2a1 corresponding to each other on the two positioning seats 2 form a detection station 2a. The plurality of formed detection stations 2a are also arranged in a straight line, and the opposite sides of the two positioning seats 2 are flat.

[0041] Specifically, the positioning groove 2a1 passes through the two side plate surfaces of the positioning seat 2, and the positioning groove 2a1 includes a positioning section 2a1a and a limiting section 2a1b. The depth and width of the positioning section 2a1a are both smaller than the width and depth of the limiting section 2a1b. The positioning section 2a1a and the limiting section 2a1b form an abutment step 2a1c at the connection point, and the screw portion 14b of the double-headed shock-absorbing bolt 14 passes through the positioning section 2a1a and extends into the limiting section 2a1b, and the screw portion 14b of the double-headed shock-absorbing bolt 14 abuts against the bottom wall of the positioning section 2a1a.

[0042] Each inspection station 2a is equipped with a tensioning assembly 4. Specifically, the tensioning assembly 4 includes two positioning sleeves 4a, each threadedly engaged with the two end screw portions 14b of the stud-type shock-absorbing bolt 14. A compression spring 9 is also sheathed around the positioning sleeves 4a, and under the action of the compression spring 9, the ends of the positioning sleeves 4a tend to move toward the abutment step 2a1c. Specifically, the positioning sleeve 4a includes an internally threaded sleeve portion 4a1 and a rod-shaped shaft portion 4a2. The outer diameter of the shaft portion 4a2 is smaller than that of the sleeve portion 4a1. The sleeve portion 4a1 extends into the limiting section 2a1b. The shaft portion 4a2 slides through the mounting bracket 8 and is rotatable relative to the mounting bracket 8. The compression spring 9 is sheathed around the shaft portion 4a2, with one end of the compression spring 9 abutting the mounting bracket 8 and the other end abutting the sleeve portion 4a1. The end of the sleeve portion 4a1 can abut against the abutment step 2a1c.

[0043] The base 1 is also provided with a driving member 7, which is a pneumatic cylinder. The telescopic rod of the driving member 7 is connected to one of the positioning seats 2 and can drive the positioning seat 2 to move closer to or away from the other positioning seat 2. Each mounting bracket 8 is also fixed with a driving member 10, which is a pneumatic cylinder. The telescopic rods of the two driving members 10 are respectively connected to the corresponding positioning seat 2 and can drive the corresponding positioning seat 2 to move closer to or away from the other positioning seat 2.

[0044] The mounting bracket 8 has mounting slots 8a extending in the direction of the positioning slots 2a1. The shafts 4a2 extend sequentially through the two side walls of the mounting slots 8a and have an annular stopper 4a3 at the protruding ends. A gear 11 is sleeved on each shaft 4a2, and the shafts 4a2 and gears 11 are circumferentially aligned and axially slidable relative to each other. A third drive member 13 is fixed to each mounting bracket 8. The drive member 13 is a pneumatic cylinder connected to a rack 12 extending in the same direction as the positioning slots 2a1. The gears 11 are positioned within their corresponding mounting slots 8a. The racks 12 extend into the mounting slots 8a and mesh with the corresponding gears 11. The drive member 13 is capable of driving the racks 12 to move back and forth along their length.

[0045] Two connecting frames 5 are provided on one of the positioning seats 2. The two connecting frames 5 are arranged near the two ends of the positioning seat 2. Several positioning grooves 2a1 on the positioning seat 2 are located between the two connecting frames 5. A correction rod 3 extending along the arrangement direction of several detection stations 2a is also provided between the two connecting frames 5. The two ends of the correction rod 3 are rotatably connected to the two connecting frames 5 through arc-shaped connecting plates 6. The correction rod 3 can swing downward relative to the base 1 and correct the stud shock-absorbing bolts 14 on each detection station 2a so that each stud shock-absorbing bolt 14 is arranged in a straight line along the length direction of the correction rod 3. The correction rod 3 also has a handle 3a.

[0046] The working principle of the detection device is as follows: the operator first places the stud-end shock-absorbing bolts 14 to be tested on the detection station 2a in sequence, so that the screw portions 14b at both ends of the stud-end shock-absorbing bolts 14 are respectively embedded in the positioning grooves 2a1 and abut against the bottom wall of the positioning section 2a1a of the positioning groove 2a1. The operator then swings the correction rod 3 downward using the handle 3a to insert it into the annular groove 14a1 of the rubber body 14a of the stud-end shock-absorbing bolt 14. As the correction rod 3 continues to swing downward, it drives the rubber body 14a with it, so that the rubber body 14a of the stud-end shock-absorbing bolt 14 can abut against the side surface of one of the positioning seats 2 and be compressed in the vertical direction, thereby achieving the position adjustment of each stud-end shock-absorbing bolt 14, so that the axis of each stud-end shock-absorbing bolt 14 remains perpendicular to the correction rod 3, and the stud-end shock-absorbing bolts are kept in a straight line along the length of the correction rod 3. Then, the second driver 10 is activated, driving the corresponding positioning seats 2 closer to each other, pre-tightening the double-headed shock-absorbing bolts 14 in the horizontal direction. Since the side surfaces of the two positioning seats 2 are both flat, the horizontal pre-tightening process is equivalent to further correcting the position of each double-headed shock-absorbing bolt 14, so that they are arranged in a straight line. Then, the third driver 13 is activated to drive the rack 12 to move, thereby driving the positioning sleeves 4a to rotate. Since the double-headed shock-absorbing bolts 14 are compressed at this time and cannot rotate, the internal threads of each positioning sleeve 4a can be screwed onto the screw portion 14b of the double-headed shock-absorbing bolt 14 by rotating under the action of the compression spring 9. Figure 2 and 3 As shown. Then, the driving member 2 10 and the driving member 3 13 stop working, and at the same time, the correction rod 3 is swung upward to move it away from the double-headed shock-absorbing bolt 14. Then, the driving member 1 7 works to drive the positioning seat 2 connected thereto to move away from the other positioning seat 2. During the movement, the positioning seat 2 can synchronously drive the positioning sleeve 4a extending into the positioning seat 2 to move together by abutting against the step 2a1c. The positioning sleeve 4a drives the screw portion 14b at one end of the double-headed shock-absorbing bolt 14 connected thereto to move, while the other positioning seat 2 is stationary, that is, the screw portion 14b at the other end of the double-headed shock-absorbing bolt 14 is stationary, thereby causing the rubber body 14a of the double-headed shock-absorbing bolt 14 to be stretched and deformed. The operator observes whether the rubber body 14a is damaged after being stretched. If no damage occurs, the performance is determined to be qualified. Otherwise, the performance is determined to be unqualified. Figure 4 and 5 Then, the correction rod 3 is swung downward to press on the double-headed shock-absorbing bolt 14, and the driving member 17 drives the corresponding positioning seat 2 to return to its original position, and then the correction rod 3 is swung upward, and the double-headed shock-absorbing bolt 14 that has been tested is removed to complete the test.

[0047] This detection device arranges several detection stations 2a in a straight line, and then cooperates with the structural setting of the correction rod 3 and the driving member 2 10 to realize the correction of the position of each double-headed shock-absorbing bolt 14 twice in succession, so that the central axis of each double-headed shock-absorbing bolt 14 is perpendicular to the correction rod 3, and the double-headed shock-absorbing bolts 14 are distributed in a straight line along the length direction of the correction rod 3, which can ensure the same stretching distance and ensure that the positions of the two ends of the double-headed shock-absorbing bolt 14 will not be offset after being screwed and fixed. The deviation in position will not cause the stretching distance of the rubber body 14a of the double-headed shock-absorbing bolt 14 to deviate, thereby affecting the detection structure, and the detection accuracy is relatively high. At the same time, the detection device can realize batch detection, the entire operation is relatively simple, and the work efficiency is also high.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0049] Although this document frequently uses terms such as base 1, positioning base 2, inspection station 2a, positioning groove 2a1, positioning section 2a1a, limiting section 2a1b, abutting step 2a1c, correction rod 3, handle 3a, stretching assembly 4, positioning sleeve 4a, sleeve portion 4a1, shaft portion 4a2, annular limiting stop 4a3, connecting frame 5, connecting plate 6, driving member 1 7, mounting frame 8, mounting groove 8a, compression spring 9, driving member 2 10, gear 11, rack 12, driving member 3 13, stud-type shock-absorbing bolt 14, rubber body 14a, annular groove 14a1, and screw portion 14b, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A performance testing device for a double-headed shock-absorbing bolt, comprising a base (1), wherein the base (1) is provided with a plurality of testing stations (2a) for placing double-headed shock-absorbing bolts (14), characterized in that: A plurality of detection stations (2a) are arranged in a straight line. The base (1) is further provided with a correction rod (3) extending along the arrangement direction of the plurality of detection stations (2a). The correction rod (3) can swing downward relative to the base (1) and correct the double-headed shock-absorbing bolts (14) on each detection station (2a) so that each double-headed shock-absorbing bolt (14) is arranged in a straight line. Each detection station (2a) is correspondingly provided with a stretching assembly (4) for connecting with the screw parts (14b) at both ends of the double-headed shock-absorbing bolt (14). The base (1) is provided with two relatively arranged positioning seats (2). Each positioning seat (2) is provided with a plurality of positioning grooves (2a1) for the screw parts (14b) on the double-headed shock-absorbing bolt (14) to be embedded. The above-mentioned detection station (2a) is formed between the two corresponding positioning grooves (2a1) on the two positioning seats (2). The opposite side surfaces of the two positioning seats (2) are planes.

2. The performance detection device of the stud-head shock-absorbing bolt according to claim 1, characterized in that: The positioning seat (2) is in the shape of a long strip, and two connecting frames (5) are provided on one of the positioning seats (2). The two connecting frames (5) are arranged near the two ends of the positioning seat (2), and a plurality of positioning grooves (2a1) on the positioning seat (2) are located between the two connecting frames (5). The two ends of the correction rod (3) are respectively rotatably connected to the two connecting frames (5) through an arc-shaped connecting plate (6).

3. The performance detection device of the stud-head shock-absorbing bolt according to claim 1 or 2, characterized in that: The stretching assembly (4) comprises two positioning sleeves (4a) capable of being respectively threadedly connected to the two ends of the double-headed shock-absorbing bolt (14); the positioning sleeves (4a) are rotatably connected to the base (1); one positioning sleeve (4a) can move relative to the base (1) toward or away from the other positioning sleeve (4a).

4. The performance detection device for the stud-head shock-absorbing bolt according to claim 3, characterized in that: The positioning groove (2a1) includes a positioning section (2a1a) and a limiting section (2a1b). The depth and width of the positioning section (2a1a) are smaller than those of the limiting section (2a1b), and abutting step (2a1c) is formed between the two. The positioning sleeve (4a) extends into the limiting section (2a1b) and can be screwed to the screw portion (14b) of the double-headed shock-absorbing bolt (14) by rotation. The end of the positioning sleeve (4a) can abut against the abutting step (2a1c). The base (1) is also provided with a driving member (7). The driving member (7) is connected to one of the positioning seats (2) and can drive the positioning seat (2) to move closer to or away from the other positioning seat (2).

5. The performance detection device for the stud-head shock-absorbing bolt according to claim 4, characterized in that: Two mounting frames (8) are also fixed on the base (1), and two positioning seats (2) are located between the two mounting frames (8). One end of the positioning sleeve (4a) extends into the limiting section (2a1b), and the other end slides through the corresponding mounting frame (8). A compression spring (9) is also provided on the outside of the positioning sleeve (4a), and under the action of the compression spring (9), the end of the positioning sleeve (4a) has a tendency to always move toward the direction of the step (2a1c).

6. The performance detection device for the stud-head shock-absorbing bolt according to claim 5, characterized in that: A second driving member (10) is also fixed on each mounting frame (8), and the second driving member (10) is connected to the corresponding positioning seat (2) and can drive the corresponding positioning seat (2) to move closer to or away from another positioning seat (2).

7. The performance detection device for the stud-head shock-absorbing bolt according to claim 5, characterized in that: The positioning sleeve (4a) comprises a sleeve portion (4a1) having an internal thread and a rod-shaped shaft portion (4a2), the outer diameter of the shaft portion (4a2) being smaller than the outer diameter of the sleeve portion (4a1), the sleeve portion (4a1) extending into the limiting section (2a1b), the shaft portion (4a2) slidingly passing through the mounting frame (8), the compression spring (9) sleeved on the shaft portion (4a2), one end of the compression spring (9) abutting against the mounting frame (8), and the other end abutting against the sleeve portion (4a1).

8. The performance detection device for the stud-head shock-absorbing bolt according to claim 7, characterized in that: A gear (11) is sleeved on each shaft portion (4a2) and the shaft portion (4a2) and the gear (11) are circumferentially positioned. A driving member three (13) is fixed on each mounting frame (8). The driving member three (13) is connected to a rack (12) and the extension direction of the rack (12) is consistent with the extension direction of the positioning groove (2a1). The driving member three (13) can drive the rack (12) to move back and forth along the length direction, and the rack (12) is meshed with the corresponding gear (11).

9. The performance detection device for the stud-head shock-absorbing bolt according to claim 8, characterized in that: The mounting frame (8) has a mounting groove (8a) extending along the distribution direction of the positioning groove (2a1), the shaft portion (4a2) sequentially passes through the two side walls of the mounting groove (8a) and has an annular limit stop edge (4a3) at the protruding end, the gear (11) is sleeved on the shaft portion (4a2) and located in the mounting groove (8a), and the rack (12) extends into the mounting groove (8a) and meshes with the corresponding gear (11).

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