Bolt fastener clamping force test tool

Abstract

The utility model relates to the technical field of clamping force testing, in particular to a bolt fastener clamping force testing tool which comprises a supporting seat, a pressure detection unit and a pressure plate are arranged on the supporting seat, the pressure detection unit is arranged between the pressure plate and the supporting seat, and the pressure plate abuts against the pressure detection unit. The pressure plate is provided with a through hole, the supporting seat is provided with a connecting hole, the bolt fastener penetrates through the through hole and then is in threaded connection with the interior of the connecting hole, and during actual operation, the bolt fastener penetrates through the through hole of the pressure plate and is in threaded connection with the interior of the connecting hole of the supporting seat, so that the pressure plate abuts against the pressure detection unit; meanwhile, the supporting seat can stably support the pressure detection unit, so that the pressure detection unit can directly measure the pressure generated by the bolt fastener on the pressure plate in the fastening process, the clamping force value is accurately obtained, and the feasibility and accuracy of the test are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamping force testing, in particular to a bolt fastener clamping force testing tool. BACKGROUND

[0002] The existing bolt fasteners are widely used in connecting and fastening various structural components, and these structures need to bear various loads such as tensile force, shear force, vibration, etc. during use. The clamping force of the bolt fastener is directly related to the reliability of the connection and the safety of the structure. If the clamping force of the bolt fastener is insufficient, the connecting part may loosen, slip or even fall off under the action of load, thereby causing serious safety accidents.

[0003] Therefore, after the bolt fastener is prepared, the clamping force thereof needs to be tested. In the traditional scheme, a pressure sensor is generally used for testing, two plates are pressed on both sides of the pressure sensor, and then a bolt fastener is used to fix the two plates. The pressure sensor outputs a pressure signal, but the bolt fastener is difficult to disassemble after being tightened. Usually, a wire cutting method is used to cut off one end of the bolt fastener for disassembly.

[0004] This disassembly method directly damages the structure of the bolt fastener, which is not convenient for recycling the bolt fastener, and there is room for improvement. Content of the utility model

[0005] In order to recycle the bolt fastener after testing, the present application provides a bolt fastener clamping force testing tool.

[0006] The bolt fastener clamping force testing tool provided by the present application adopts the following technical scheme:

[0007] A bolt fastener clamping force testing tool, comprising a support seat, a pressure detection unit and a pressure plate are arranged on the support seat, the pressure detection unit is detachably arranged between the pressure plate and the support seat, and the pressure plate and the pressure detection unit are in abutment, a through hole is formed in the pressure plate, a connecting hole is formed in the support seat, and the bolt fastener is threadedly connected in the connecting hole after being arranged in the through hole.

[0008] By adopting the technical scheme, in actual operation, the bolt fastener is threaded through the pressure plate through hole and is threadedly connected to the support seat connecting hole, so that the pressure plate abuts against the pressure detection unit, and the support seat can stably support the pressure detection unit in cooperation with the pressure plate, so that the pressure detection unit can measure the pressure generated by the bolt fastener on the pressure plate during the fastening process, so as to accurately obtain the clamping force value; since the pressure detection unit is detachably arranged between the pressure plate and the support seat, the entire disassembly process becomes simple and convenient after the tool completes the test, and the staff can conveniently perform the disassembly operation without damaging the bolt fastener, so that the bolt fastener can be completely disassembled and recycled.

[0009] Preferably, the support seat comprises a center column, a bottom plate sliding on the center column, and a limiting structure for preventing the bottom plate from being separated from one end of the center column, the other end of the center column abuts against the pressure plate, the connecting hole is arranged on the center column, and the pressure detection unit is arranged on the bottom plate.

[0010] By adopting the technical scheme, the limiting structure can stably limit the bottom plate on the center column, and in use, the bolt fastener can be accurately threadedly connected to the connecting hole of the center column after being threaded through the through hole of the pressure plate, so that the center column abuts against the pressure plate, and the force received by the pressure plate can be accurately and stably transmitted to the pressure detection unit on the bottom plate.

[0011] Preferably, the limiting structure comprises two support rods, the two sides of the center column are provided with clamping grooves, and any one of the support rods is clamped in the clamping groove, and any one of the support rods abuts against the bottom plate.

[0012] By adopting the technical scheme, the clamping grooves on the two sides of the center column are clamped with the support rods, which effectively prevents the bottom plate from being separated from one end of the center column, ensures the stability of the bottom plate during the test, reduces the interruption or data deviation caused by the falling of the bottom plate during the test, and enhances the reliability of the test tool.

[0013] Preferably, the two support rods are distributed on the two sides of the center column in a central symmetric manner, the end of any one of the support rods extends beyond the outer peripheral edge of the pressure plate, and the two support rods extend in different directions of the clamping grooves.

[0014] By adopting the technical scheme, the ends of the two support rods extend beyond the outer peripheral edge of the pressure plate, and the two support rods extend in different directions, which enhances the limiting effect on the bottom plate and facilitates the disassembly operation of the staff on the bottom plate, and improves the convenience of using the test tool.

[0015] Preferably, the pressure detection unit is a pressure sensor, the pressure sensor is provided with a plug hole, the center column is in plug fit with the pressure sensor, and the pressure sensor is fixed on the chassis by bolts.

[0016] By adopting the above technical scheme, the pressure sensor is arranged on the center column and fixed on the chassis by bolts, so that the stability of the pressure sensor during testing is ensured, and the pressure sensor can detect the pressure received by itself in real time, thereby improving the accuracy of test data.

[0017] Preferably, a weight-reducing hole is arranged at one end of the center column close to the chassis, and the weight-reducing hole is in communication with the connecting hole.

[0018] By adopting the above technical scheme, the overall weight of the center column is reduced by arranging the weight-reducing hole, so that the test tool is more flexible during carrying and use, and the connecting function of the connecting hole to the bolt fastener is not affected.

[0019] Preferably, a friction pattern for increasing friction is arranged on the outer wall of any of the support rods.

[0020] By adopting the above technical scheme, the friction between the support rod and the slot wall of the clamping groove is increased by arranging the friction pattern on the support rod, so that the staff can better operate the force during installation, adjustment and disassembly of the support rod, and the convenience of using the test tool is improved.

[0021] Preferably, the pressure sensor is in a rectangular shape, and a scratch-preventing surface is arranged at each corner of the pressure sensor to prevent scratching the staff.

[0022] By adopting the above technical scheme, the staff is effectively prevented from being scratched by the corners of the pressure sensor during use, carrying and storage of the test tool, so that the safety during testing is improved.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. During actual operation, the bolt fastener is arranged through the pressure disc through hole and threadedly connected in the support base connecting hole, so that the pressure disc abuts against the pressure detection unit, and the support base can stably support the pressure detection unit in cooperation with the pressure disc, so that the pressure detection unit can measure the pressure generated by the bolt fastener during fastening, so that the clamping force value is accurately obtained; since the pressure detection unit is detachably arranged between the pressure disc and the support base, the entire disassembly process becomes simple and convenient after the tool completes testing, so that the staff can perform disassembly operation, and the bolt fastener will not be damaged, so that the bolt fastener can be completely disassembled and recycled;

[0025] 2. The use of the limiting structure can stably limit the base plate on the center column. During use, the bolt fastener can be accurately screwed into the connecting hole of the center column after passing through the through hole on the pressure plate, so that the center column and the pressure plate form an abutting fit, ensuring that the force on the pressure plate can be accurately and stably transmitted to the pressure detection unit on the base plate.

[0026] 3. The clamping grooves on both sides of the center column are clamped with the support rods, effectively preventing the base plate from being detached from one end of the center column, ensuring the stability of the base plate during testing, reducing the interruption or data deviation caused by the falling of the base plate, and enhancing the reliability of the test tool. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the axis measurement schematic diagram mainly embodying the overall structure in the embodiment of the application;

[0028] Figure 2 is the local exploded view mainly embodying the cooperation relationship between structures in the embodiment of the application;

[0029] Figure 3 is the exploded view mainly embodying the limiting structure in the embodiment of the application.

[0030] Reference signs: 1, support seat; 11, center column; 111, connecting hole; 112, clamping groove; 113, weight-reducing hole; 12, base plate; 121, sliding hole; 13, limiting structure; 131, support rod; 1311, friction pattern; 2, pressure detection unit; 21, plug-in hole; 22, anti-scratch surface; 3, pressure plate; 31, through hole. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings Figure 1 - the accompanying drawings Figure 3 The application will be further described in detail.

[0032] The embodiment of the application discloses a bolt fastener clamping force test tool.

[0033] Reference Figure 1 A bolt fastener clamping force test tool, comprising a support seat 1, a pressure detection unit 2 and a pressure plate 3 are arranged on the support seat 1, the pressure detection unit 2 is detachably arranged between the pressure plate 3 and the support seat 1, and the pressure plate 3 abuts against the pressure detection unit 2.

[0034] Reference Figure 2 and Figure 3The support base 1 comprises a center column 11, a base plate 12 and a limiting structure 13. The base plate 12 is provided with a sliding hole 121 which is in sliding cooperation with the center column 11. The base plate 12 is slidably arranged on the outer side of the center column 11 from top to bottom. The base plate 12 is prevented from being separated from the lower end of the center column 11 by the limiting structure 13. The upper surface of the center column 11 is in the same horizontal plane as the upper surface of the pressure detection unit 2 during use.

[0035] With reference to Figure 2 The upper end of the center column 11 is in abutting cooperation with the pressure plate 3. The pressure plate 3 is provided with a through hole 31. The center column 11 is provided with a connecting hole 111 at the axial center for threadedly connecting a bolt fastener to be tested. During use, the bolt fastener is screwed into the connecting hole 111 of the center column 11 after being arranged through the through hole 31, so that the pressure plate 3 is in abutting cooperation with the pressure detection unit 2.

[0036] With reference to Figure 2 and Figure 3 In the embodiment, the pressure detection unit 2 is a pressure sensor. The pressure sensor is in the shape of a rectangular body. The pressure sensor is provided with a plug-in hole 21. The plug-in hole 21 of the pressure sensor is in plug-in cooperation with the upper end of the center column 11. The upper surface of the base plate 12 is fixed by a bolt, so that the base plate 12 is in close abutting cooperation with the lower surface of the pressure sensor. At the same time, the base plate 12 can stably support the pressure sensor in cooperation with the pressure plate 3, so as to ensure the stability of the position of the pressure sensor.

[0037] With reference to Figure 1 and Figure 2 When the bolt fastener is tightened, the pressure sensor is pressed by the pressure plate 3 and the base plate 12. The pressure sensor detects the pressure signal and outputs the pressure signal in the form of an electric signal, so as to accurately quantify the axial clamping force generated by the bolt fastener during the tightening process.

[0038] With reference to Figure 2 and Figure 3 The limiting structure 13 comprises two center-symmetrically arranged supporting rods 131. The center column 11 is provided with a clamping groove 112 which penetrates through the two sides of the center column 11. The penetration direction of any clamping groove 112 is perpendicular to the axial direction of the center column 11. Any supporting rod 131 is in clamping cooperation with the clamping groove 112. The upper surface of any supporting rod 131 is in abutting cooperation with the lower surface of the base plate 12.

[0039] With reference to Figure 2 and Figure 3When installing, the two support rods 131 are respectively inserted into the clamping grooves 112 transversely, so that the support rods 131 are clamped on the inner walls of the clamping grooves 112, and the end portions of the support rods 131 extend outward from the outer peripheral edge of the pressure plate 3, and the extension directions of the two support rods 131 are opposite, thereby forming symmetrical support to the base plate 12, ensuring the stability of the base plate 12 during the test, and reducing the possibility of test interruption or data deviation caused by the falling of the base plate 12.

[0040] With reference to Figure 2 and Figure 3 When it is necessary to disassemble the support rods 131, the worker knocks the extension part of the support rod 131 along the opening direction of the clamping groove 112, so that the support rod 131 in the clamping groove 112 can be easily taken out, improving the convenience of operation.

[0041] With reference to Figure 1 and Figure 2 Since the bolt fastener is detachably connected with the pressure plate 3 and the center column 11, after the test is completed, the whole disassembly process becomes simple and convenient, which is convenient for the worker to disassemble, and the bolt fastener will not be damaged, so that the bolt fastener can be completely disassembled and recycled.

[0042] With reference to Figure 2 and Figure 3 In order to reduce the overall weight of the tooling, a weight reduction hole 113 is formed at one end of the center column 11 close to the base plate 12, and the weight reduction hole 113 is coaxially communicated with the connecting hole 111, which not only ensures the connection function of the bolt fastener on the center column 11, but also reduces material consumption, so that the test tooling is more flexible and convenient during transportation and use.

[0043] With reference to Figure 3 The outer wall of any support rod 131 is processed with dense friction lines 1311, which increase the friction between the support rod 131 and the groove wall of the clamping groove 112, so that the worker can better operate the force during the installation, adjustment and disassembly of the support rod 131.

[0044] With reference to Figure 2 The four corners of the pressure sensor are processed with anti-scratch surfaces 22, which effectively prevent the sharp corners of the pressure sensor from scratching the worker during the use, transportation and storage of the test tooling, thereby improving the safety during the test.

[0045] The implementation principle of the embodiment of the application is as follows: in actual operation, the staff first inserts two supporting rods 131 into the clamping grooves 112 of the center column 11 transversely, so that the supporting rods 131 are clamped on the inner walls of the clamping grooves 112 and the end portions of the supporting rods 131 extend outward from the outer peripheral edges of the pressure plate 3, and the extending directions of the two supporting rods 131 are opposite.

[0046] Then, the base plate 12 is slid onto the center column 11, so that the lower surface of the base plate 12 abuts against the supporting rods 131, ensuring the stability of the base plate 12 on the supporting rods 131. Then, the pressure sensor is inserted into the center column 11 and fixed to the upper surface of the base plate 12 by bolts, and the pressure plate 3 is placed on the pressure sensor. The staff then inserts the bolt fastener to be tested through the through hole 31 of the pressure plate 3 and screws it into the connecting hole 111, until the head of the bolt fastener to be tested abuts against the upper surface of the pressure plate 3.

[0047] Finally, the torque wrench is used to tighten the bolt fastener to be tested to a preset value, so that the pressure sensor is pressed by the pressure plate 3 and the base plate 12 at the same time, so that the pressure sensor can record the pressure in real time and transmit it to the external device through the data line to generate a clamping force curve.

[0048] After the test is completed, the staff can remove the bolt fastener by rotating it in the opposite direction, and then easily remove the pressure plate 3, the pressure sensor and the base plate 12. Finally, the staff can knock the extending portions of the supporting rods 131 to remove the supporting rods 131 in the clamping grooves 112.

[0049] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A fixture for testing the clamping force of bolt fasteners, characterized in that: The device includes a support base (1), on which a pressure detection unit (2) and a pressure plate (3) are provided. The pressure detection unit (2) is detachably disposed between the pressure plate (3) and the support base (1), and the pressure plate (3) abuts against the pressure detection unit (2). A through hole (31) is provided on the pressure plate (3), and a connecting hole (111) is provided on the support base (1). Bolts and fasteners pass through the through hole (31) and are threaded into the connecting hole (111).

2. The bolt fastener clamping force testing fixture according to claim 1, characterized in that: The support base (1) includes a central column (11), a chassis (12) that slides on the central column (11), and a limiting structure (13) for preventing the chassis (12) from detaching from one end of the central column (11). The other end of the central column (11) forms an abutment fit with the pressure plate (3). The connecting hole (111) is provided on the central column (11), and the pressure detection unit (2) is provided on the chassis (12).

3. The bolt fastener clamping force testing fixture according to claim 2, characterized in that: The limiting structure (13) includes two support rods (131). The two sides of the central column (11) are provided with snap-fit ​​grooves (112). Any one of the support rods (131) is snapped into the snap-fit ​​groove (112), and any one of the support rods (131) forms an abutment fit with the chassis (12).

4. The bolt fastener clamping force testing fixture according to claim 3, characterized in that: The two support rods (131) are distributed symmetrically on both sides of the central column (11). The end of any one of the support rods (131) extends out of the outer periphery of the pressure plate (3), and the two support rods (131) extend out of the snap-fit ​​groove (112) in different directions.

5. The bolt fastener clamping force testing fixture according to claim 2, characterized in that: The pressure detection unit (2) is configured as a pressure sensor, and the pressure sensor is provided with a plug hole (21). The central column (11) and the pressure sensor are plugged together. The pressure sensor is fixed to the chassis (12) by bolts.

6. The bolt fastener clamping force testing fixture according to claim 2, characterized in that: The central column (11) has a weight reduction hole (113) at one end near the chassis (12), and the weight reduction hole (113) is connected to the connecting hole (111).

7. The bolt fastener clamping force testing fixture according to claim 3, characterized in that: The outer wall of any of the support rods (131) is provided with friction grooves (1311) to increase friction.

8. The bolt fastener clamping force testing fixture according to claim 5, characterized in that: The pressure sensor is rectangular in shape, and scratch-resistant surfaces (22) are provided at the four corners of the pressure sensor to prevent scratches to the workers.

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