Fastener load test device

Abstract

The utility model belongs to the technical field of fastener test, and particularly relates to a fastener load test device which comprises a rack, a torsion seat, a fixing seat, a clamping mechanism, a lifting mechanism and a test motor, the rack is provided with the torsion seat, and the middle part of the upper surface of the torsion seat is provided with a placing hole; the fixed seat is arranged above the torsion seat; a positioning hole is formed in the middle of the bottom surface of the fixed seat; clamping mechanisms are arranged on the torsion seat and the fixed seat, each clamping mechanism comprises a clamping motor, a double-thread screw, two clamping pieces and two guide grooves, the clamping motors can drive the double-thread screws to rotate, and when the double-thread screws rotate, the two clamping pieces can be driven to move in the opposite directions or move away from each other in the two guide grooves; the lifting mechanism is used for driving the fixing seat to get close to and away from the torsion seat; the test motor is arranged on the rack and is used for applying torsional force to the torsion seat; compared with the prior art, the testing device provided by the utility model can be used for carrying out a torsion test on the fastener, and clamping energy consumption cannot be generated after the fastener is clamped, so that the energy consumption in a continuous testing process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fastener testing, and in particular relates to a fastener load testing device. Background Art

[0002] Load testing of fasteners is a test method used to evaluate how fasteners (such as bolts, screws, rivets, etc.) perform when subjected to different types of forces. This type of testing is critical to ensure that fasteners can work safely and reliably, especially in aerospace, automotive manufacturing, heavy machinery and other applications that require high-strength connections.

[0003] The torsion test is one of the fastener load tests. By applying a torsional force to the fastener after clamping the fastener, the torque resistance capacity of the fastener is evaluated. The Chinese patent with publication number: CN220854500U discloses a torsion testing machine, including a machine body, a first motor is threadedly connected to the left side of the machine body, a reversal button is fixedly installed on the front of the first motor, a table leg is threadedly connected to the bottom of the machine body, a second motor is threadedly connected to the top left side of the machine body, a left clamp is threadedly connected to the top left side of the machine body, a right slide is fixedly connected to the top center of the machine body, a third motor is slidably connected to the top right side of the right slide, a first screw is transmission-connected to the right side of the first motor, the first screw is rotationally connected to the right side of the inner wall of the machine body, and the top of the first screw is transmission-connected to the first rotating block.

[0004] In actual use, it was found that in this technology, the left clamp uses the second motor to drive the turntable to rotate so that the three positioning rods slide in the three positioning grooves, thereby driving the center of the three clamps to move to clamp one end of the fastener. During the torsion test, the second motor needs to work continuously to stabilize the three clamps in the current clamping position and keep the end of the fastener clamped. When continuous testing is required, the energy consumption is high, so this technology needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a fastener load test device in view of the above-mentioned technical problems. The test device can perform a torsion test on the fastener and will not generate clamping energy consumption after the fastener is clamped, thereby reducing the energy consumption of the continuous test process.

[0006] In view of this, the utility model provides a fastener load test device, comprising:

[0007] A frame, wherein a torque seat is provided on the frame, and a placement hole is opened in the middle of the upper surface of the torque seat;

[0008] A fixed seat, which is arranged above the torque seat, is fixed horizontally relative to the frame, and a positioning hole is opened in the middle of the bottom surface of the fixed seat;

[0009] Clamping mechanisms are provided on both the torsion seat and the fixed seat. The clamping mechanism includes a clamping motor, a double-headed screw, two clamping members, and two guide grooves. The clamping motor can drive the double-headed screw to rotate. When the double-headed screw rotates, it can thread-drive the two clamping members to move towards each other or away from each other in the two guide grooves respectively;

[0010] Lifting mechanism, which is used to drive the fixed seat to approach and move away from the torsion seat;

[0011] Testing motor, which is arranged on the frame and is used to apply a torsional force to the torsion seat.

[0012] In this technical solution, one end of the fastener to be tested is placed in the placement groove on the torsion seat. The clamping mechanism on the torsion seat is driven to clamp the end of the fastener close to the placement groove. Then, the lifting mechanism drives the fixed seat to approach the torsion seat. When the end of the fastener away from the placement groove contacts the positioning hole, the lifting mechanism stops driving. At this time, the clamping mechanism on the fixed seat clamps the end of the fastener close to the positioning hole. Then, the testing motor is started to apply a torsional force to the torsion seat, so as to conduct a torsion test on the clamped fastener.

[0013] In the above technical solution, further, the two guide grooves are respectively arranged on both sides of the placement hole or the positioning hole. The two clamping members are respectively arranged to slide along the radial direction of the placement hole or the positioning hole in the two guide grooves. The axial direction of the double-headed screw is the same as the radial direction of the placement hole or the positioning hole.

[0014] In the above technical solution, further, opposite threads are respectively provided on the outer walls of the double-headed screw located in the two guide grooves. The clamping member includes a sliding seat and a clamping block. The clamping block is arranged on the side of the sliding seat close to the placement hole or the positioning hole. The sliding seat slides in the guide groove, and a threaded through hole that is in threaded cooperation with the double-headed screw is provided at the bottom of the sliding seat.

[0015] In the above technical solution, further, the lifting mechanism includes a lifting cylinder. The lifting cylinder is arranged at the top of the frame, and the piston rod of the lifting cylinder is vertically downward and connected to the fixed seat.

[0016] In the above technical solution, further, a travel switch is arranged in the positioning hole, and the travel switch is electrically connected to the lifting cylinder.

[0017] In the above technical solution, further, an auxiliary support groove is vertically opened on the side wall of the frame, and a support block is arranged on the side wall of the fixed seat. One end of the support block slides vertically in the auxiliary support groove.

[0018] In the above technical solution, further, both the clamping motor and the testing motor are servo motors.

[0019] The beneficial effects of the present utility model are:

[0020] 1. By designing the clamping mechanism as a combination of a clamping motor, a double-headed screw, two clamping members, and two guide grooves, after the clamping mechanisms on the torque seat and the fixed seat clamp the two ends of the fastener respectively, the two clamping motors stop working. At this time, the thread fit between the double-headed screw and the clamping member can lock the clamping member in the current position, so that the fastener is continuously clamped. In this way, the clamping motor does not need to work continuously during the test, reducing the energy consumption during continuous testing.

[0021] 2. By driving two sliding seats to move towards each other or away from each other through the double-headed screw, one clamping motor can drive the two sliding seats to clamp and release the fastener with two clamping blocks at the same time, with high clamping efficiency and the axis of the fastener not easily deviating after being clamped.

[0022] 3. By arranging a travel switch in the positioning hole and controlling the lifting cylinder to stop through the travel switch, there is no need to manually stop the lifting cylinder by workers, reducing the labor intensity of workers and improving the automation level of the test device.

[0023] 4. By opening an auxiliary support groove on the side wall of the frame and arranging a support block on the side wall of the fixed seat, through the cooperation of the support block and the auxiliary support groove, the lifting of the fixed seat can be guided and limited, and the fixed seat during the torsion test can also be assisted in supporting, ensuring the stability of the overall structure of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the first direction of the present invention.

[0026] Figure 2 It is a three-dimensional structure schematic diagram of the second direction of the present invention.

[0027] Figure 3 It is a three-dimensional structure schematic diagram of the torque seat in the present invention.

[0028] Figure 4 It is a schematic diagram of the internal cross-sectional structure of the torque seat in the present invention.

[0029] Figure 5 It is a three-dimensional structure schematic diagram of the fixed seat in the present invention.

[0030] Figure 6 Schematic cross-sectional structure diagram of the inside of the fixed seat in the present utility model.

[0031] The markings in the figure are indicated as:

[0032] 1. Frame; 2. Torque seat; 201. Placing hole; 3. Fixed seat; 301. Positioning hole; 4. Clamping mechanism; 401. Clamping motor; 402. Double-headed screw; 403. Sliding seat; 4031. Threaded through hole; 404. Clamping block; 405. Guide groove; 5. Lifting mechanism; 6. Testing motor; 7. Travel switch; 8. Auxiliary support groove; 9. Support block Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0034] In the description of the present utility model, it should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the accompanying drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as a part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Embodiment 1

[0036] As Figure 1 - Figure 2 shown, this embodiment provides a fastener load test device, including: a frame 1, a torque seat 2, a fixed seat 3, a clamping mechanism 4, a lifting mechanism 5, a testing motor 6

[0037] The frame 1 includes a bottom frame body and a top frame body. The top frame body is C-shaped. The torque seat 2 is provided at the bottom of the top frame body. A placing hole 201 is opened in the middle of the upper surface of the torque seat 2.

[0038] The fixed seat 3 is arranged above the torsion seat 2. The fixed seat 3 is horizontally fixed relative to the frame 1. A positioning hole 301 is opened in the middle of the bottom surface of the fixed seat 3, and the positioning hole 301 is coaxially arranged with the placement hole 201.

[0039] Clamping mechanisms 4 are provided on both the torsion seat 2 and the fixed seat 3. In this embodiment, taking the clamping mechanism 4 on the torsion seat 2 as an example, please refer to Figure 3 , the clamping mechanism 4 includes a clamping motor 401, a double-headed screw 402, two clamping members, and two guide grooves 405. The two guide grooves 405 are respectively opened on the upper surface of the torsion seat 2 and on both sides of the placement hole 201. An installation groove is also opened in the torsion seat 2. The installation groove communicates with the two guide grooves 405 and penetrates through one side wall of the torsion seat 2. The double-headed screw 402 is rotatably connected in the installation groove. The axial direction of the double-headed screw 402 is the same as the radial direction of the placement hole 201. One end of the double-headed screw 402 extends out of the installation groove and is connected to the clamping motor 401. The clamping motor 401 can drive the double-headed screw 402 to rotate. The two clamping members are respectively arranged in the two guide grooves 405 and slide along the radial direction of the placement hole 201 or the positioning hole 301. When the double-headed screw 402 rotates, it can threadedly drive the two clamping members to move towards each other or away from each other in the two guide grooves 405.

[0040] Specifically, please refer to Figure 4 , two sections of opposite threads are respectively opened on the outer walls of the double-headed screw 402 located in the two guide grooves 405. The clamping member includes a sliding seat 403 and a clamping block 404. The clamping block 404 is arranged on one side of the sliding seat 403 close to the placement hole 201. The sliding seat 403 is slidably arranged in the guide groove 405. A threaded through hole 4031 that is threadedly matched with the double-headed screw 402 is opened at the bottom of the sliding seat 403. The sliding seat 403 is threadedly sleeved on the outer wall of the double-headed screw 402 through the threaded through hole 4031.

[0041] The structure of the clamping mechanism 4 on the fixed seat 3 is the same as the structure of the clamping mechanism 4 on the torsion seat 2. Specifically, please refer to Figure 6 ;

[0042] The lifting mechanism 5 is used to drive the fixed seat 3 to approach and move away from the torsion seat 2. In this embodiment, the lifting mechanism 5 includes a lifting cylinder. The lifting cylinder is arranged on the top of the top frame. The piston rod of the lifting cylinder is vertically downward and is connected to the fixed seat 3.

[0043] The test motor 6 is arranged on the bottom frame and is used to apply a torsional force to the torsion seat 2.

[0044] In this embodiment, both the clamping motor 401 and the test motor 6 are selected as servo motors.

[0045] In this embodiment, one end of the fastener to be tested is placed in the placement groove on the torque seat 2, and the clamping mechanism 4 on the torque seat 2 is driven to clamp the end of the fastener near the placement groove. Then, the lifting mechanism 5 drives the fixed seat 3 closer to the torque seat 2. When the end of the fastener away from the placement groove contacts the positioning hole 301, the lifting mechanism 5 stops driving. At this time, the clamping mechanism 4 on the fixed seat 3 clamps the end of the fastener near the positioning hole 301. Then, the test motor 6 is started to apply a torsional force to the torque seat 2, so as to perform a torsional test on the clamped fastener;

[0046] After the clamping mechanisms 4 on the torque seat 2 and the fixed seat 3 clamp the two ends of the fastener respectively, the two clamping motors 401 stop working. At this time, the threaded fit between the double-headed screw 402 and the clamping member can lock the clamping member in the current position, so that the fastener is continuously clamped. In this way, the clamping motor 401 does not need to work continuously during the test, reducing the energy consumption during the continuous test process.

[0047] Embodiment 2

[0048] This embodiment provides a fastener load test device. In addition to including the technical solutions of the above embodiment, the driving of the lifting cylinder is optimized;

[0049] Please refer to Figure 5 , in this embodiment, a travel switch 7 is provided in the positioning hole 301. The travel switch 7 is electrically connected to the lifting cylinder. The travel switch 7 box and the lifting cylinder are connected to the control system. When the travel switch 7 is triggered, it will send an electrical signal to the control system, so that the control system controls the lifting cylinder to stop working. After the clamping mechanism 4 on the torque seat 2 clamps one end of the fastener, the lifting cylinder drives the fixed seat 3 to slowly descend on the frame 1. When the other end of the fastener extends into the positioning hole 301 and triggers the travel switch 7, the lifting cylinder stops working;

[0050] Through this design, there is no need to manually stop the lifting cylinder by workers, reducing the labor intensity of workers and improving the automation level of the test device; and the clamping mechanism 4 on the fixed seat 3 can also be connected to the control system through a program. In this way, after one end of the fastener is clamped on the torque seat 2, the subsequent clamping process can be completely automatically completed by the control system, and the overall test device has a high degree of automation.

[0051] Embodiment 3

[0052] This embodiment provides a fastener load test device. In addition to including the technical solutions of the above embodiment, the connection method between the fixed seat 3 and the frame 1 is optimized;

[0053] In this embodiment, please refer to Figure 2 , an auxiliary support groove 8 is opened on the side wall of the frame 1 in the vertical direction. Please refer toFigure 5 , a support block 9 is provided on the side wall of the fixed seat 3, and one end of the support block 9 is slidably arranged in the auxiliary support groove 8 in the vertical direction;

[0054] Actually, a plurality of auxiliary support grooves 8 are arranged at intervals in the horizontal direction on the frame 1. In this embodiment, two are taken as examples. Each auxiliary support groove 8 is connected with a matching support block 9. The support block 9 can only slide vertically in the auxiliary support groove 8 and cannot move horizontally. In this way, the lifting of the fixed seat 3 can be guided and limited, and the fixed seat 3 during the torsion test can be assisted to support, ensuring the stability of the overall structure of the test device.

[0055] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments in this application can be combined with each other. This application is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this application, those of ordinary skill in the art can also make many forms without departing from the purpose of this application and the scope protected by the claims, and all belong to the protection scope of this application.

Claims

1. A fastener load test device, characterized in that, Comprising: A frame (1) with a torsion seat (2) provided thereon, and a placement hole (201) is formed in the middle of the upper surface of the torsion seat (2); A fixed seat (3) is arranged above the torsion seat (2), the fixed seat (3) is horizontally fixed relative to the frame (1), and a positioning hole (301) is formed in the middle of the bottom surface of the fixed seat (3); Clamping mechanisms (4) are provided on both the torsion seat (2) and the fixed seat (3). Each clamping mechanism (4) includes a clamping motor (401), a double-headed screw (402), two clamping members, and two guide grooves (405). The clamping motor (401) can drive the double-headed screw (402) to rotate in a threaded manner, and when the double-headed screw (402) rotates, it can drive the two clamping members to move towards each other or away from each other in the two guide grooves (405) respectively; A lifting mechanism (5) is used to drive the fixed seat (3) to approach and move away from the torsion seat (2); A test motor (6) is arranged on the frame (1) and is used to apply a torsional force to the torsion seat (2).

2. The fastener load test device according to claim 1, characterized in that: The two guide grooves (405) are respectively arranged on both sides of the placement hole (201) or the positioning hole (301). The two clamping members are respectively arranged to slide along the radial direction of the placement hole (201) or the positioning hole (301) in the two guide grooves (405), and the axial direction of the double-headed screw (402) is the same as the radial direction of the placement hole (201) or the positioning hole (301).

3. The fastener load test device according to claim 2, wherein: On the outer walls of the double-headed screw (402) located in the two guide grooves (405), two sections of opposite threads are respectively formed. Each clamping member includes a sliding seat (403) and a clamping block (404). The clamping block (404) is arranged on the side of the sliding seat (403) close to the placement hole (201) or the positioning hole (301). The sliding seat (403) slides in the guide groove (405), and a threaded through hole (4031) that is in threaded cooperation with the double-headed screw (402) is formed at the bottom of the sliding seat (403).

4. A fastener load test device according to claim 1, characterized in that: The lifting mechanism (5) includes a lifting cylinder. The lifting cylinder is arranged at the top of the frame (1), and the piston rod of the lifting cylinder is vertically downward and connected to the fixed seat (3).

5. The fastener load test device according to claim 4, characterized in that: A travel switch (7) is arranged in the positioning hole (301), and the travel switch (7) is electrically connected to the lifting cylinder.

6. The fastening element load test device according to claim 4, characterized in that: An auxiliary support groove (8) is formed in the side wall of the frame (1) in the vertical direction, and a support block (9) is arranged on the side wall of the fixed seat (3). One end of the support block (9) is arranged to slide in the auxiliary support groove (8) in the vertical direction.

7. The fastening element load test device according to claim 1, characterized in that: Both the clamping motor (401) and the test motor (6) are servo motors.

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