Adjustable bolt fixing clamp for anti-slip test

Abstract

The utility model relates to the technical field of clamps, in particular to an adjustable bolt fixing clamp for an anti-slip test. According to the technical scheme, the clamping device comprises a base plate, sliding blocks and a connecting base, a screw rod is rotationally arranged on the base plate, the two sliding blocks are symmetrically arranged on the screw rod in a threaded mode, the thread meshing directions of the two sliding blocks and the screw rod are opposite, the sliding blocks are in sliding contact with the base plate, clamping arms are arranged on the sliding blocks, and the clamping arms are connected with the connecting base. The screw rod is arranged on the base plate, the middle section of the screw rod is provided with a driven wheel, the connecting base is arranged on the base plate, a driving wheel is rotationally arranged on the connecting base, the driven wheel and the driving wheel are in a gear tooth meshing state, and a positioning assembly is arranged on the connecting base and used for limiting the rotating state of the driving wheel. A bolt is prevented from rotating or sliding in the screwing process by adjusting the distance between the clamping arms, meanwhile, the positioning assembly is arranged to achieve the locking function, the driving wheel is prevented from spinning, and it is ensured that the clamp stably clamps the bolt.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to an adjustable bolt fixing clamp for anti-slip testing. Background Technology

[0002] The steel structure anti-slip test is mainly used to evaluate the anti-slip performance of steel structure connection nodes under high-strength bolt connections, to ensure the stability and safety of the structure under load. During the test, the specimens need to be fabricated in a standardized manner, and the bolt preload must meet relevant standards. The specimen typically consists of two cover plates and a core plate, which are fixed to the core plate with high-strength bolts. Force sensors are nested on the bolts to monitor the stress on the bolts.

[0003] However, when using an electric torque wrench to tighten nuts, the presence of a force sensor can cause bolt slippage, affecting the accuracy of the bolt preload and the efficiency of the test. Due to the limited bolt spacing, traditional fixing methods are difficult to effectively clamp the bolts and may damage the force sensor. Therefore, an adjustable bolt clamp is needed to improve testing efficiency, prevent bolt slippage during tightening, and accommodate bolts of different sizes.

[0004] To address this problem, we propose an adjustable bolt clamp for anti-slip testing. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an adjustable bolt fixing clamp for anti-slip testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable anti-slip test bolt fixing fixture, comprising a base plate, sliders and a connecting seat, wherein a screw is rotatably provided on the base plate, two sliders are symmetrically threaded on the screw, and the two sliders are threaded in opposite directions to the screw, and the sliders are in sliding contact with the base plate, and each slider is provided with a clamping arm;

[0007] The screw has a driven wheel in the middle section, the connecting seat is provided on the base plate, the connecting seat has a driving wheel rotatably mounted on it, the driven wheel and the driving wheel are in a gear meshing state, the connecting seat has a positioning component, the positioning component is used to limit the rotation state of the driving wheel.

[0008] Preferably, the positioning component consists of a limiting block, a limiting groove, a shaft, and an eccentric disc. The limiting block is disposed on the outer wall of the connecting seat, and the limiting groove is formed within the limiting block.

[0009] Preferably, the shaft is rotatably disposed within the limiting block, and the eccentric disk is eccentrically disposed on the shaft.

[0010] Preferably, a rubber layer is bonded at the contact position between the eccentric disk and the limiting groove.

[0011] Preferably, the slider has a threaded hole that matches the screw, and the screw thread engages with the threaded hole.

[0012] Preferably, baffles are symmetrically arranged on the substrate, and the driven wheel is located between the baffles.

[0013] Preferably, the shaft end of the drive wheel protrudes from the connecting seat, and the shaft end of the drive wheel is provided with an operating cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] During use, the adjustable anti-slip test bolt fixing clamp of this utility model can be moved by hand to the bolt that needs to be positioned and prevented from slipping, and the distance between the two clamping arms can be adjusted so that the opening size between the two clamping arms matches the bolt. Then, it can be placed against the bolt to prevent it from slipping.

[0016] When adjusting the opening size, the operator manually rotates the operating cap, which drives the driving wheel to rotate. The meshing action of the teeth between the driving wheel and the driven wheel drives the driven wheel to rotate, which in turn drives the screw to rotate. The screw is designed with opposite thread meshing directions between the two sliders and the screw, and the sliders are constrained by the base plate to prevent deflection. Under the principle of the lead screw, the rotation of the screw is converted into the movement of the two sliders moving closer or further apart, thereby adjusting the opening size of the device.

[0017] Once the opening size of the device is adjusted, the positioning component controls the drive wheel to prevent it from spinning. When the positioning component is working, the operator manually rotates the eccentric disc to move the eccentric part of the eccentric disc between the teeth of the drive wheel, thereby locking the drive wheel. When the drive wheel needs to rotate, the eccentric part of the eccentric disc is moved out of the limit block, and the drive wheel can rotate without restriction.

[0018] This utility model provides a clamp that can be held and moved to the target bolt. By adjusting the distance between the clamp arms, it can be made to fit tightly against the bolt, thereby preventing the bolt from rotating or slipping during tightening and improving the accuracy of the bolt preload. The size of the clamp arm opening is adjustable to accommodate bolts of different specifications. It also has a positioning component to achieve a locking function, preventing the drive wheel from spinning and ensuring that the clamp stably holds the bolt. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 For the present utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0022] Figure 4 This is a schematic diagram of the positioning component structure of this utility model.

[0023] Figure label:

[0024] 1. Base plate; 2. Slider; 3. Clamping arm; 4. Screw; 5. Driven wheel; 6. Driving wheel; 7. Operating cap; 8. Positioning assembly; 801. Limiting block; 802. Limiting groove; 803. Shaft; 804. Eccentric disc; 9. Connecting seat; 10. Baffle. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] like Figures 1-4 As shown, the present invention proposes an adjustable anti-slip test bolt fixing fixture, including a base plate 1, a slider 2 and a connecting seat 9. A screw 4 is rotatably provided on the base plate 1, and two sliders 2 are symmetrically threaded on the screw 4. The sliders 2 are provided with threaded holes adapted to the screw 4. The screw 4 is threaded into the threaded holes, and the thread engagement direction of the two sliders 2 and the screw 4 is opposite. The sliders 2 are in sliding contact with the base plate 1, and each slider 2 is provided with a clamping arm 3.

[0028] The screw 4 has a driven wheel 5 in the middle section, and a connecting seat 9 is provided on the base plate 1. A driving wheel 6 is rotatably provided on the connecting seat 9. The shaft end of the driving wheel 6 protrudes from the connecting seat 9, and the shaft end of the driving wheel 6 is provided with an operating cap 7. The driven wheel 5 and the driving wheel 6 are in a gear meshing state. The connecting seat 9 is provided with a positioning component 8, which is used to limit the rotation state of the driving wheel 6. The device can be held and moved to the bolt that needs to be positioned and prevented from slipping. The distance between the two clamping arms 3 is adjusted so that the opening size between the two clamping arms 3 matches the bolt, and then it is pressed against the bolt to prevent it from slipping.

[0029] When adjusting the opening size, the operator manually rotates the operating cap 7, which drives the driving wheel 6 to rotate. The meshing action between the driving wheel 6 and the driven wheel 5 drives the driven wheel 5 to rotate, which in turn drives the screw 4 to rotate. The screw 4 is designed with opposite thread meshing directions between the two sliders 2 and the screw 4, and the sliders 2 are constrained by the base plate 1 and do not deflect. Therefore, under the principle of the lead screw, the rotation of the screw 4 is transformed into the movement of the two sliders 2 moving closer or further apart, thereby adjusting the opening size of the device.

[0030] Once the opening size of the device is adjusted, the positioning component 8 controls the drive wheel 6 to prevent it from spinning.

[0031] Example 2

[0032] like Figures 1-4 As shown, the adjustable anti-slip test bolt fixing fixture proposed in this utility model, compared with Embodiment 1, further includes: a positioning component 8 consisting of a limiting block 801, a limiting groove 802, a shaft 803, and an eccentric disk 804. The limiting block 801 is located on the outer wall of the connecting seat 9, the limiting groove 802 is opened in the limiting block 801, the shaft 803 is rotatably located in the limiting block 801, and the eccentric disk 804 is eccentrically located on the shaft 803. When the positioning component 8 is working, the operator manually rotates the eccentric disk 804 to move the eccentric part of the eccentric disk 804 between the teeth of the driving wheel 6, thereby locking the driving wheel 6. When the driving wheel 6 needs to rotate, the eccentric part of the eccentric disk 804 is moved out of the limiting block 801, and the driving wheel 6 can rotate without restriction.

[0033] A rubber layer is glued at the contact position between the eccentric disk 804 and the limiting groove 802. The design of the rubber layer increases the friction between the eccentric disk 804 and the limiting groove 802, preventing the eccentric disk 804 from rotating easily.

[0034] The substrate 1 is symmetrically provided with baffles 10, and the driven wheel 5 is located between the baffles 10. Through the design of the baffles 10, the baffles 10 protect the driven wheel 5.

[0035] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0036] 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. An adjustable bolt fixing fixture for anti-slip testing, comprising a base plate (1), a slider (2), and a connecting seat (9), characterized in that: A screw (4) is rotatably provided on the substrate (1), and two sliders (2) are symmetrically threaded on the screw (4). The two sliders (2) and the screw (4) have opposite thread meshing directions, and the sliders (2) and the substrate (1) are in sliding contact. Each slider (2) is provided with a clamping arm (3). The screw (4) has a driven wheel (5) in the middle section. The connecting seat (9) is provided on the base plate (1). The driving wheel (6) is rotatably provided on the connecting seat (9). The driven wheel (5) and the driving wheel (6) are in a gear meshing state. The connecting seat (9) is provided with a positioning component (8). The positioning component (8) is used to limit the rotation state of the driving wheel (6).

2. The adjustable anti-slip test bolt fixing fixture according to claim 1, characterized in that: The positioning component (8) consists of a limiting block (801), a limiting groove (802), a shaft (803), and an eccentric disc (804). The limiting block (801) is located on the outer wall of the connecting seat (9), and the limiting groove (802) is formed inside the limiting block (801).

3. The adjustable anti-slip test bolt fixing fixture according to claim 2, characterized in that: The shaft (803) is rotatably disposed within the limiting block (801), and the eccentric disk (804) is eccentrically disposed on the shaft (803).

4. The adjustable anti-slip test bolt fixing fixture according to claim 3, characterized in that: A rubber layer is glued to the contact position between the eccentric disk (804) and the limiting groove (802).

5. The adjustable anti-slip test bolt fixing fixture according to claim 1, characterized in that: The slider (2) has a threaded hole that matches the screw (4), and the screw (4) is threaded into the threaded hole.

6. The adjustable anti-slip test bolt fixing fixture according to claim 1, characterized in that: The substrate (1) is symmetrically provided with baffles (10), and the driven wheel (5) is located between the baffles (10).

7. The adjustable anti-slip test bolt fixing fixture according to claim 1, characterized in that: The shaft end of the drive wheel (6) protrudes from the connecting seat (9), and the shaft end of the drive wheel (6) is provided with an operating cap (7).

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