A steel structure bolt tightening test device

Abstract

The invention relates to the field of test devices, and discloses a steel structure bolt tightening test device. The technical solution thereof mainly comprises a torque wrench, an adjusting sleeve is provided on the torque wrench, at least two clamping mechanisms are provided on the adjusting sleeve, each clamping mechanism corresponds to one of the rotation angles of the bolt head, each clamping mechanism comprises a clamping assembly, a clamping assembly and a force applying member, the force applying member is used for squeezing and switching a memory metal sheet from a relaxed state to a clamped state. The invention pre-clamps the head of the bolt and determines the basic position of the bolt by providing a clamping assembly. During this process, the memory metal sheet can move synchronously with the clamping member to ensure the consistency of the spacing between the two, so that the clamping effect is consistent during multiple clamping processes, which is convenient for controlling the clamping degree and for adapting to bolts of various sizes. The same adjusting sleeve can be used to test bolts of various sizes, and the use is convenient.

Description

Technical Field

[0001] The invention relates to the field of testing devices, and more particularly to a steel structure bolt tightening testing device. Background Art

[0002] Most threads need to be pre-tightened during connection and assembly to enhance the rigidity, reliability, tightness and anti-loosening ability of the connection to prevent gaps or relative slippage between the connected parts after loading. Therefore, controlling the size of the pre-tightening force is of particular importance to ensure the threaded connection. Appropriate pre-tightening force is beneficial to the reliability of the threaded connection and the fatigue strength of the connecting parts. The bolt tightening training device can be used for workers to experience the force applied under bolts of various diameters, and the torque can be measured in combination with a digital torque wrench. The torque wrench is provided with a replaceable sleeve, and each sleeve is formed with a hexagonal card hole for sleeves on the head of the bolt to be tested. Therefore, if you want to test bolts of different sizes, you need to replace the sleeves of the corresponding specifications, which is inconvenient to use. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a steel structure bolt tightening test device to overcome the above-mentioned defects in the prior art, so that the tightening test device has the characteristics of being able to adapt to complete tightening tests of bolts of different sizes and being easy to use.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A steel structure bolt tightening test device comprises a torque wrench, wherein the torque wrench is provided with an adjusting sleeve, and the adjusting sleeve is provided with at least two clamping mechanisms, each of which corresponds to one of the rotation angles of the bolt head, and each of the clamping mechanisms comprises

[0006] A clamping assembly, wherein the clamping assembly comprises a clamping piece and an elastic piece, a clamping space is formed between each of the clamping pieces, the clamping piece and the adjusting sleeve are slidably matched to enable the clamping space to be increased or decreased, the elastic piece is used to provide elastic force in the sliding direction of the clamping piece, the clamping piece comprises two clamping parts and a plurality of movable parts, an angle is formed between the two clamping parts, the angle is adapted to the rotation angle of the bolt head, the movable parts are sequentially distributed on both sides of the two clamping parts away from each other, adjacent movable parts and adjacent movable parts and clamping parts can move or rotate relative to each other,

[0007] The clamping assembly comprises a memory metal sheet and a plurality of connecting rods, the middle portion of the memory metal sheet is integrally connected to the clamping member, the connecting rods correspond to the movable parts one by one, one end of the connecting rods is fixedly connected to the memory metal sheet, and the other end of the connecting rods is fixedly connected to the corresponding movable part, the clamping assembly comprises a relaxed state and a clamped state, when the clamping assembly is switched to the clamped state, the spacing between the memory metal sheet and the movable part is reduced and drives each of the connecting rods to bend in a direction away from the two clamping parts, so that each of the movable parts abuts against the bolt head,

[0008] A force applying member is used for pressing and switching the memory metal sheet from the relaxed state to the clamped state.

[0009] In the present invention, preferably, the force-applying member is slidably matched with the adjusting sleeve, a plurality of driving rods are rotatably connected to the adjusting sleeve, the driving rods correspond one-to-one to the force-applying member, the driving rods are threadedly connected to the force-applying member, and the sliding direction of the force-applying member is parallel to the axial direction of the driving rods.

[0010] In the present invention, preferably, the tightening test device also includes a synchronization component, which includes a driving ring and a plurality of bevel gears, the bevel gears correspond to the driving rods one by one, and the bevel gears and the corresponding driving rods are coaxially fixedly connected, the driving ring is sleeved on the outside of the adjusting sleeve and is rotatably connected to the adjusting sleeve, a plurality of bevel teeth are formed on the driving ring and mesh with each of the bevel gears, and when the driving ring rotates, each of the bevel gears drives the driving rods to rotate so that each of the force-applying members moves synchronously.

[0011] In the present invention, preferably, the force-applying member includes two ejection parts and two pull-back parts, and the ejection parts and the pull-back parts are respectively arranged on both sides of the memory metal sheet, and the two ejection parts are respectively matched with one end of the memory metal sheet, and the two pull-back parts are respectively matched with one end of the memory metal sheet, and when the force-applying member slides, the ejection parts and the pull-back parts can alternately resist the memory metal sheet to switch the clamping assembly between the relaxed state and the clamped state.

[0012] In the present invention, preferably, an adsorption assembly is provided on the adjusting sleeve, and the adsorption assembly includes a plurality of suction cups. A connecting ring is rotatably connected to the end surface of the adjusting sleeve, and the connecting ring is coaxially arranged with the adjusting sleeve, and each of the suction cups is arranged on the connecting ring.

[0013] In the present invention, preferably, the adsorption assembly also includes a plurality of connecting cylinders, pistons and sliding rods, the connecting cylinders corresponding to the suction cups one by one, one end of the connecting cylinder being connected to the suction cup, the other end of the connecting cylinder being a closed end face, the piston being slidably connected in the connecting cylinder, one end of the sliding rod being fixedly connected to the piston, the other end of the sliding rod being fixedly connected to the connecting ring, the sliding rod penetrating through and being slidably connected to the end face of the connecting cylinder, and when the piston moves toward the direction close to the suction cup, a negative pressure can be formed in the connecting cylinder.

[0014] In the present invention, preferably, an observation groove is provided on the side wall of the adjusting sleeve, and the position of the observation groove corresponds to the two ends of the memory metal sheet.

[0015] In the present invention, preferably, the movable portion is configured as a movable block, and flexible members are fixedly connected between adjacent movable blocks and between adjacent movable blocks and the clamping portion, respectively.

[0016] In the present invention, preferably, an indicator light is provided on the adjusting sleeve, a pressure sensor is provided between one of the clamping parts and the movable block, and the indicator light is electrically connected to the pressure sensor to indicate the clamping state.

[0017] In the present invention, preferably, anti-slip grooves are formed on the driving ring.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention pre-clamps the head of the bolt by setting a clamping assembly to determine the basic position of the bolt. In this process, the memory metal sheet can move synchronously with the clamping member to ensure the consistency of the spacing between the two, so that the clamping effect remains consistent during multiple clamping processes, which is convenient for controlling the clamping degree and adapting to bolts of various sizes. The same adjustment sleeve can be used to test bolts of various sizes, which is convenient to use;

[0020] 2. The present invention performs secondary fixation on the head of the bolt through a clamping assembly, and in the clamped state, the connecting rod bends in a direction away from the two clamping parts, the connecting rod squeezes the movable part, and the friction between the movable part and the bolt head is increased, resulting in a good fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0022] Figure 2 is a schematic diagram of the three-dimensional structure of the adjusting sleeve in this embodiment;

[0023] Figure 3 yes Figure 2A local enlarged schematic diagram of the middle A;

[0024] Figure 4 is a structural schematic diagram of the clamping assembly in this embodiment in a relaxed state;

[0025] Figure 5 is a structural schematic diagram of the clamping assembly in the clamping state in this embodiment;

[0026] Figure 6 Schematic diagram of the cross-sectional structure of the suction cup assembly in this embodiment.

[0027] Reference numerals:

[0028] 1. Adjusting sleeve; 101. Observation slot; 11. Driving ring; 2. Clamping piece; 21. Clamping part; 22. Moving part; 23. Flexible part; 3. Memory metal sheet; 31. Connecting rod; 4. Force-applying piece; 401. Ejecting part; 402. Pulling part; 41. Driving rod; 42. Bevel gear; 5. Suction cup; 51. Connecting tube; 511. Piston; 512. Sliding rod; 6. Connecting ring; 7. Torque wrench. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] Please also see Figures 1 to 6The present embodiment provides a steel structure bolt tightening test device, including a torque wrench 7, an adjusting sleeve 1 is provided on the torque wrench 7, and at least two clamping mechanisms are provided on the adjusting sleeve 1, and each clamping mechanism corresponds to one of the rotation angles of the bolt head. In the present embodiment, the number of clamping mechanisms is set to 6 groups, and the clamping mechanisms and the rotation angles of the bolt heads correspond one to one. In addition, the number of clamping mechanisms ranges from two to six, and the distribution thereof mainly considers the uniformity of the distribution. Each clamping mechanism includes a clamping assembly, a clamping assembly and a force applying member 4.

[0033] In this embodiment, refer to Figure 2 and Figure 3 As shown, the clamping assembly includes a clamping member 2 and an elastic member, a clamping space is formed between each clamping member 2, the clamping member 2 and the adjusting sleeve 1 are slidably matched to enable the clamping space to be enlarged or reduced, the elastic member is used to provide elastic force in the sliding direction of the clamping member 2, the clamping member 2 includes two clamping parts 21 and a plurality of movable parts 22, an angle is formed between the two clamping parts 21, the angle is adapted to the rotation angle of the bolt head, the movable parts 22 are sequentially distributed on both sides of the two clamping parts 21 away from each other, and the adjacent movable parts 22 and the adjacent movable parts 22 and the clamping parts 21 can move or rotate relative to each other. The clamping assembly includes a memory metal sheet 3 and a plurality of connecting rods 31, the middle part of the memory metal sheet 3 is connected to the clamping member 2 as a whole, the connecting rods 31 correspond to the movable parts 22 one by one, one end of the connecting rod 31 is fixedly connected to the memory metal sheet 3, and the other end of the connecting rod 31 is fixedly connected to the corresponding movable part 22.

[0034] In this embodiment, refer to Figure 2 As shown, the force member 4 is slidably matched with the adjustment sleeve 1, and a plurality of driving rods 41 are rotatably connected to the adjustment sleeve 1. The driving rods 41 correspond to the force members 4 one by one, and the driving rods 41 are threadedly connected to the force members 4. The sliding direction of the force members 4 is parallel to the axial direction of the driving rods 41. An observation groove 101 is provided on the side wall of the adjustment sleeve 1, and the position of the observation groove 101 corresponds to the two ends of the memory metal sheet 3. The setting of the observation groove 101 facilitates the observation of the state of the memory metal sheet 3 in the adjustment sleeve 1 to confirm whether the force member 4 has moved into place.

[0035] In this embodiment, refer to Figure 2As shown, the fastening test device also includes a synchronization component, which includes a drive ring 11 and a plurality of bevel gears 42. The bevel gears 42 correspond to the drive rods 41 one by one, and the bevel gears 42 and the corresponding drive rods 41 are coaxially fixedly connected. The drive ring 11 is sleeved on the outside of the adjustment sleeve 1 and is rotatably connected to the adjustment sleeve 1. The drive ring 11 is formed with a plurality of bevel teeth and meshes with each bevel gear 42. When the drive ring 11 rotates, each bevel gear 42 drives the drive rod 41 to rotate so that each force-applying member 4 moves synchronously. Anti-slip grooves (not shown in the figure) are formed on the drive ring 11. The setting of the synchronization component facilitates the synchronous adjustment of the position of each force-applying block to ensure the stability and consistency of the movement of each force-applying block. The adjustment sleeve 1 is provided with an adsorption component, which includes a plurality of suction cups 5. A connecting ring 6 is rotatably connected to the end surface of the adjustment sleeve 1. The connecting ring 6 is coaxially arranged with the adjustment sleeve 1, and each suction cup 5 is arranged on the connecting ring 6. Since the test of the bolt will be affected by its installation position, in actual use, it is easy to cause the adjustment sleeve 1 to be difficult to use due to the harsh installation position. The suction cup 5 is used to initially fix the position between the adjustment sleeve 1 and the bolt to be tested, so as to facilitate the detection of bolts in various positions. The setting of the connecting ring 6 prevents each from rotating with the rotation of the adjustment sleeve 1.

[0036] In this embodiment, refer to Figure 3 As shown, the force-applying member 4 includes two ejection parts 401 and two pull-back parts 402, the ejection parts 401 and the pull-back parts 402 are respectively arranged on both sides of the memory metal sheet 3, the two ejection parts 401 are respectively adapted to one end of the memory metal sheet 3, and the two pull-back parts 402 are respectively adapted to one end of the memory metal sheet 3. When the force-applying member 4 slides, the ejection parts 401 and the pull-back parts 402 can alternately abut against the memory metal sheet 3, so that the clamping assembly switches between a relaxed state and a clamped state. The setting of the ejection parts 401 and the pull-back parts 402 facilitates the regulation of the shape of the memory metal sheet 3. In order to facilitate the observation of the state of the memory metal sheet 3, the thickness of the pull-back parts 402 and the ejection parts 401 can be set to be less than the thickness of the memory metal sheet 3, so that it can be observed through the observation slot 101.

[0037] In this embodiment, refer to Figure 4 and Figure 5As shown, the clamping assembly includes a relaxed state and a clamped state. When the clamping assembly switches to the clamped state, the spacing between the memory metal sheet 3 and the movable part 22 is reduced and drives each connecting rod 31 to bend in a direction away from the two clamping parts 21, so that each movable part 22 is against the bolt head. The force-applying member 4 is used to squeeze and switch the memory metal sheet 3 from the relaxed state to the clamped state. In the relaxed state, the clamping member 2 can preliminarily clamp the head of the bolt, which is convenient for preliminarily fixing the head of the bolt. When in the clamped state, each connecting rod 31 pushes the movable part 22, so that each movable part 22 is fixed with the straight edge on the bolt head, which increases the force between the clamping member 2 and the bolt, and the static friction force is also increased synchronously, which can achieve a better fixing effect. The movable part 22 is set as a movable block, and the flexible member 23 is fixedly connected between adjacent movable blocks and between adjacent movable blocks and the clamping part 21. This arrangement facilitates the connection of the movable part 22, and the arrangement of the flexible part 23 enables the positions of the movable parts 22 to be relatively moved, adapting to the changes of the clamping assembly in the relaxed state and the clamped state. When in the clamped state, due to the action of the connecting rod 31, each movable block will not only abut against the bolt head but will also be squeezed in the direction close to the clamping part 21, thereby increasing the force between the clamping part 2 and the bolt head. Therefore, the arrangement of the flexible part facilitates the movement of the movable block.

[0038] In this embodiment, refer to Figure 4 and Figure 5 As shown, the adsorption assembly also includes a plurality of connecting tubes 51, pistons 511 and sliding rods 512. The connecting tubes 51 correspond to the suction cups 5 one by one. One end of the connecting tube 51 is connected to the suction cups 5, and the other end of the connecting tube 51 is a closed end face. The piston 511 is slidably connected in the connecting tube 51. One end of the sliding rod 512 is fixedly connected to the piston 511, and the other end of the sliding rod 512 is fixedly connected to the connecting ring 6. The sliding rod 512 penetrates and is slidably connected to the end face of the connecting tube 51. When the piston 511 moves toward the direction close to the suction cup 5, negative pressure can be formed in the connecting tube 51. Since the suction cup 5 is fixed by atmospheric pressure, in this embodiment, the setting of the connecting tube 51 can enhance the adsorption effect of the suction cup 5. The piston 511 is used to form negative pressure in the piston 511 and the connecting tube 51, thereby providing a greater adsorption force for the suction cup 5 to prevent the suction cup 5 from falling off.

[0039] An indicator light (not shown in the figure) is provided on the adjusting sleeve 1, and a pressure sensor is provided between one of the clamping parts 21 and the movable block, and the indicator light is electrically connected to the pressure sensor to indicate the clamping state. Since the mutual squeezing force will only exist between the movable blocks and between the movable block and the clamping part 21 after the head of the bolt is clamped in place, the clamping state of the clamping assembly can be obtained more accurately by using the pressure sensor to indicate the clamping condition. And since the position between the clamping part 2 and the memory metal sheet 3 is relatively fixed, the pressure on the pressure sensor is stable and controllable when in the clamping state, and its indication effect is good and the indication is accurate.

[0040] Working principle:

[0041] In the initial state, the clamping assembly is in a relaxed state. First, the adjusting sleeve 1 is sleeved outside the head of the bolt to be tested, and the clamping part 21 on each clamping member 2 is sleeved outside the head. Then, the adjusting sleeve 1 is pressed to make each sliding rod 512 and the piston 511 slide in the connecting tube 51 and form a negative pressure in the connecting tube 51, so that the suction cup 5 is adsorbed on the mounting surface of the bolt. Then, the driving disk is rotated, and the driving disk drives each bevel gear 42 to rotate synchronously. The bevel gear 42 drives each driving rod 41 to rotate. The driving rod 41 drives each force member 4 to move toward the direction close to the memory metal sheet 3. The ejection part 401 abuts against the two ends of the memory metal sheet 3 and switches the memory metal sheet 3 to the clamping state. Each connecting rod 31 presents a shape of bending in the direction of the two sides of the clamping member 2. At this time, each movable block abuts against the head of the bolt, further fixes the bolt, and confirms the clamping state through the indication of the indicator light 12. Then, the adjusting sleeve 1 is rotated by the torque wrench 7 to complete the torque detection.

[0042] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A steel structure bolt tightening test device, Features: The invention comprises a torque wrench (7), wherein the torque wrench (7) is provided with an adjusting sleeve (1), wherein the adjusting sleeve (1) is provided with at least two clamping mechanisms, each of the clamping mechanisms respectively corresponding to one of the rotation angles of the bolt head, and each of the clamping mechanisms comprises A clamping assembly, the clamping assembly comprising a clamping piece (2) and an elastic piece, a clamping space being formed between each of the clamping pieces (2), the clamping piece (2) and the adjusting sleeve (1) being slidably matched so that the clamping space can be increased or decreased, the elastic piece being used to provide elastic force in the sliding direction of the clamping piece (2), the clamping piece (2) comprising two clamping parts (21) and a plurality of movable parts (22), an angle being formed between the two clamping parts (21), the angle being adapted to the rotation angle of the bolt head, the movable parts (22) being sequentially distributed on two sides of the two clamping parts (21) being away from each other, adjacent movable parts (22) and adjacent movable parts (22) and the clamping parts (21) being relatively movable or rotatable, A clamping assembly, the clamping assembly comprising a memory metal sheet (3) and a plurality of connecting rods (31), the middle portion of the memory metal sheet (3) being integrally connected to the clamping member (2), the connecting rods (31) corresponding to the movable portions (22) one by one, one end of the connecting rod (31) being fixedly connected to the memory metal sheet (3), the other end of the connecting rod (31) being fixedly connected to the corresponding movable portion (22), the clamping assembly comprising a relaxed state and a clamped state, when the clamping assembly is switched to the clamped state, the spacing between the memory metal sheet (3) and the movable portion (22) is reduced and drives each of the connecting rods (31) to bend in a direction away from the two clamping portions (21), so that each of the movable portions (22) abuts against the bolt head, A force applying member (4) is used to squeeze and switch the memory metal sheet (3) from the relaxed state to the clamped state.

2. A steel structure bolt tightening test device according to claim 1, Features: The force-applying member (4) is slidably matched with the adjusting sleeve (1); a plurality of driving rods (41) are rotatably connected to the adjusting sleeve (1); the driving rods (41) correspond to the force-applying member (4) one by one; the driving rods (41) are threadedly connected to the force-applying member (4); and the sliding direction of the force-applying member (4) is parallel to the axial direction of the driving rods (41).

3. A steel structure bolt tightening test device according to claim 2, Features: The tightening test device further comprises a synchronization component, the synchronization component comprising a drive ring (11) and a plurality of bevel gears (42), the bevel gears (42) corresponding to the drive rods (41) one by one, and the bevel gears (42) and the corresponding drive rods (41) are coaxially fixedly connected, the drive ring (11) is sleeved on the outside of the adjustment sleeve (1) and is rotationally connected to the adjustment sleeve (1), the drive ring (11) is formed with a plurality of bevel teeth and meshes with each of the bevel gears (42), when the drive ring (11) rotates, each of the bevel gears (42) drives the drive rods (41) to rotate so that each of the force applying members (4) moves synchronously.

4. A steel structure bolt tightening test device according to claim 1, Features: The force-applying member (4) comprises two ejection parts (401) and two pull-back parts (402), wherein the ejection parts (401) and the pull-back parts (402) are respectively arranged on both sides of the memory metal sheet (3), the two ejection parts (401) are respectively matched with one end of the memory metal sheet (3), and the two pull-back parts (402) are respectively matched with one end of the memory metal sheet (3), and when the force-applying member (4) slides, the ejection parts (401) and the pull-back parts (402) can alternately abut against the memory metal sheet (3), so that the clamping assembly switches between the relaxed state and the clamped state.

5. A steel structure bolt tightening test device according to claim 1, Features: The adjusting sleeve (1) is provided with an adsorption assembly, which comprises a plurality of suction cups (5). A connecting ring (6) is rotatably connected to the end surface of the adjusting sleeve (1), the connecting ring (6) is coaxially arranged with the adjusting sleeve (1), and each of the suction cups (5) is arranged on the connecting ring (6).

6. A steel structure bolt tightening test device according to claim 5, Features: The adsorption assembly further comprises a plurality of connecting tubes (51), a piston (511) and a sliding rod (512); the connecting tubes (51) correspond to the suction cups (5) one by one; one end of the connecting tube (51) is connected to the suction cup (5); the other end of the connecting tube (51) is a closed end surface; the piston (511) is slidably connected in the connecting tube (51); one end of the sliding rod (512) is fixedly connected to the piston (511); the other end of the sliding rod (512) is fixedly connected to the connecting ring (6); the sliding rod (512) penetrates and is slidably connected to the end surface of the connecting tube (51); when the piston (511) moves in a direction close to the suction cup (5), negative pressure can be formed in the connecting tube (51).

7. A steel structure bolt tightening test device according to claim 1, Features: An observation slot (101) is provided on the side wall of the adjustment sleeve (1), and the position of the observation slot (101) corresponds to the two ends of the memory metal sheet (3).

8. A steel structure bolt tightening test device according to claim 1, Features: The movable portion (22) is configured as a movable block, and flexible components (23) are respectively fixedly connected between adjacent movable blocks and between adjacent movable blocks and the clamping portion (21).

9. A steel structure bolt tightening test device according to claim 8, Features: An indicator light is provided on the adjustment sleeve (1), a pressure sensor is provided between one of the clamping parts (21) and the movable block, and the indicator light is electrically connected to the pressure sensor to indicate the clamping state.

10. A steel structure bolt tightening test device according to claim 3, Features: Anti-slip grooves are formed on the driving ring (11).

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