CN220018812U - Tightening device torque measurement and calibration tool - Google Patents

Abstract

The utility model relates to a tightening device torque measurement calibration tool which comprises a workbench for installing a transmission mechanism and a limiting mechanism, wherein the transmission mechanism comprises a first transmission module, a second transmission module and a conversion head, the limiting mechanism comprises a translation supporting limiting unit and a reducing limiting unit, a real-time torque sensing unit capable of collecting a torque value with dynamic change in the synchronous transmission process is arranged between the first transmission module and the second transmission module, the reducing limiting unit, the conversion head, the second transmission module, the real-time torque sensing unit, the first transmission module and the translation supporting limiting unit are orderly arranged on the workbench, and a tightening device to be measured which can be in transmission butt joint with the first transmission module is arranged on the translation supporting limiting unit in a limiting mode, so that the real-time torque sensing unit can continuously transmit and collect the torque output by the first transmission module.

Description

Tightening device torque measurement and calibration tool

Technical Field

The utility model relates to the technical field of tightening device calibration tools, in particular to a tightening device torque measurement calibration tool.

Background

At present, with the rapid development of industries such as automobile manufacturing, equipment manufacturing, transportation and the like, a large number of bolt installations with different torque ranges are generally required to complete the assembly of spare parts when related equipment and tools are manufactured. However, with the improvement of the performance requirements of the whole equipment, the installation and adjustment requirements on fasteners such as bolts are also higher and higher. Because in automatic batch assembly production, automatic tightening ware is the bolt tightening equipment by generally used, and it can load the control of moment of torsion according to the demand to promoted the assembly quality and the assembly efficiency of bolt by a wide margin, and it can carry out the moment of torsion value setting according to the demand, thereby accurately provides the adjustable moment of torsion of size.

However, since the tightening drive of the tightening device is deviated due to long-time use, and the torque actually provided by the tightening device is deviated from the set value and the display value during operation, in order to ensure the tightening accuracy, the tightening torque of the tightening device needs to be measured and calibrated regularly, and the conventional torque measuring patch needs to be connected with a wire, so that the wire is easy to wind during measurement. In addition, the existing static-mounted torque monitoring sensor is usually arranged at the tail end of the bolt structure, the measured torque value is the tightening torque of the actual torque value generated by the tightening device after the actual torque value is buffered and attenuated by the bolt structure, and the data and the actual data have deviation, so that the accurate calibration cannot be effectively completed.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present utility model was made, the text is not limited to details and contents of all that are listed, but it is by no means the present utility model does not have these prior art features, the present utility model has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.

Disclosure of Invention

The utility model aims to provide a tightening device torque measurement calibration tool capable of simulating a real tightening process and enabling a sensing module to acquire a real-time torque value by synchronously rotating along with a tightening device so as to improve accuracy of measured data, so that the problems that the existing tightening device calibration equipment cannot measure the real value of the torque in a working state, and a shaft transmission path between a statically installed torque monitoring sensor and the tightening device is long, so that power buffering exists, and the torque monitoring value is smaller are solved.

The technical scheme adopted by the utility model is as follows: the utility model provides a calibration frock is measured to tightening ware moment of torsion, is including the workstation that is used for installing drive mechanism and stop gear, drive mechanism includes first drive module, second drive module and change head, stop gear includes translation support limit unit and reducing limit unit, wherein, be provided with between first drive module and the second drive module and gather the real-time moment of torsion sensing unit that has dynamic change's moment of torsion value in the in-process that carries out synchronous drive, reducing limit unit, change head, second drive module, real-time moment of torsion sensing unit, first drive module and translation support limit unit are in order on the workstation, and the translation support limit unit go up spacing install can with the tight ware of waiting of transmission butt joint of first drive module, make real-time moment of torsion sensing unit can last transmission and gather by the moment of torsion that first drive module exported.

According to a preferred embodiment, the reducing limiting unit comprises a limiting support block and a reducing clamping piece, wherein the limiting support block is detachably mounted on the workbench, the reducing clamping piece is arranged on the surface, facing the second transmission module, of the limiting support block, a through hole communicated with a reducing hole of the reducing clamping piece is formed in the limiting support block, and the reducing clamping piece is used for limiting and mounting the test nut in a mode of adjusting the size of the diameter of the reducing hole defined by the limiting support block and overlapping the axis of the test nut and the axis of the reducing hole.

According to a preferred embodiment, the reducing clamping piece comprises a connecting sleeve, a double-layer inserting pipe body and a reducing piece, wherein the connecting sleeve is installed on the side face of the limiting support block, the double-layer inserting pipe body is inserted on one side, far away from the limiting support block, of the connecting sleeve, the end portion, inserted into the connecting sleeve, of the double-layer inserting pipe body is further rotationally connected with the reducing piece penetrating through the inner ring pipe body of the connecting sleeve, and the reducing piece can rotate around the connecting edge between the connecting sleeve and the connecting sleeve.

According to a preferred embodiment, the connecting shaft rotationally connected with the inner ring pipe body is further sleeved with an elastic limiting piece, and the elastic limiting piece can limit the relative initial position between the inner ring pipe body and the diameter adjusting piece, so that when the inner ring pipe body is partially moved out of the connecting sleeve, the diameter adjusting piece can deflect under the resilience acting force of the elastic limiting piece to move part of the plate body to the outer side of the inner ring pipe body.

According to a preferred embodiment, the second transmission module is detachably connected to the conversion head on the side facing the reducing limiting unit, and a test bolt capable of being in butt joint with the test nut clamped by the reducing clamping piece is inserted into the conversion head, so that the rotation torque transmitted by the conversion head can force the test bolt to be controllably rotated into the test nut.

According to a preferred embodiment, the second transmission module comprises a second transmission connection shaft, a second transmission support seat and a second rotation limiter defining the position and the movable way of the second transmission connection shaft in the second transmission support seat; the second transmission connecting shaft is inserted into the inner ring of the second rotation limiting part, and the second transmission supporting seat is sleeved on the outer ring of the second rotation limiting part.

According to a preferred embodiment, the shaft connecting cap of the end of the second transmission connecting shaft far away from the conversion head is connected with the force measuring shaft of the real-time torque sensing unit, and the end of the force measuring shaft far away from the second transmission connecting shaft is also connected with the first transmission connecting shaft of the first transmission module.

According to a preferred embodiment, the real-time torque sensing unit comprises the force measuring shaft, a torque sensing monitoring unit and a data display unit, wherein the force measuring shaft penetrates through a shell of the torque sensing monitoring unit and can be used for monitoring a rotation torque value in the transmission process of the torque sensing monitoring unit in real time; the torque sensing monitoring unit is electrically connected with the data display unit through a wire.

According to a preferred embodiment, a bolt head structural member is arranged at one end of the first transmission connecting shaft far away from the force measuring shaft, so that the first transmission connecting shaft can be in transmission butt joint with the output end of the to-be-tested tightening device, and the rotary motion output by the to-be-tested tightening device is transmitted.

According to a preferred embodiment, the translational support limiting unit comprises a mounting frame, a limiting member, a translational block and a limiting guide rail, wherein the limiting guide rail is mounted on the workbench, and the mounting frame can perform directional translation along the translational block in the direction defined by the limiting guide rail.

The beneficial effects of the utility model are as follows:

according to the utility model, the diameter adjusting pieces are circumferentially arranged at intervals on the circumference defined by the inner ring pipe body, so that when the diameter adjusting pieces are pushed by the connecting sleeve to shift into the inner ring pipe body, more plate bodies shift into the inner ring pipe body along with the deepening of the rotation depth of the inner ring pipe body, and the diameter adjusting pieces can better define test nuts with different sizes, so that the device is convenient for measuring and calibrating the torque of the tightening device by utilizing bolts and nuts with different sizes. The reducing limiting unit can position and clamp the test nut, so that the test nut can assist in simulating a real screwing process, and the authenticity and accuracy of detection data are higher. In addition, the reducing limiting unit can eliminate the interference of the relative movement of the test bolt and the test nut, so that the test nut and the test bolt can stably acquire the torque output by the to-be-tested tightening device in the torque transmission process.

According to the utility model, the real-time torque sensing unit is arranged, so that the real-time torque sensing unit can synchronously rotate along with the rotation output by the to-be-tested tightening device, and the torque sensing unit can be connected with the output end of the to-be-tested tightening device through the first transmission connecting shaft, so that the torque transmitted between the torque sensing monitoring unit and the to-be-tested tightening device has no energy loss and driving buffering, and the torque sensing monitoring unit can more accurately acquire the truest torque value output by the to-be-tested tightening device. Compared with a static torque sensing detection mechanism arranged at the tail end of the test bolt, the device can monitor the torque value in a simulated real bolt tightening state, so that the detection and calibration of the tightening device can be effectively carried out.

Finally, the translation mechanism is arranged below the second transmission module, so that the tool can be provided with real-time torque sensing units with different lengths and test bolts according to actual detection and calibration requirements, and the application range of the tool to different screwdrivers to be tested is improved.

Drawings

FIG. 1 is a schematic view of a preferred tool for calibrating torque measurement of a fastener according to the present utility model;

fig. 2 is a schematic plan view of a reducing clamp of a preferred tool for measuring and calibrating torque of a tightening device according to the present utility model.

List of reference numerals

1: a work table; 2: a reducing limiting unit; 3: a first transmission module; 4: a second transmission module; 5: a chute; 6: a real-time torque sensing unit; 7: a translation supporting and limiting unit; 8: a tightening device to be tested; 9: a translation mechanism; 21: a limit supporting block; 22: a variable diameter clamping member; 31: a first drive connection shaft; 32: a first transmission support seat; 33: a first rotation limiter; 41: a second drive connection shaft; 42: a second transmission support seat; 43: a second rotation limiter; 61: a force measuring shaft; 62: a torque sensing monitoring unit; 63: a data display unit; 71: a mounting frame; 72: a limiting piece; 73: a translation block; 74: a spacing guide rail; 211: a through hole; 221: a connecting sleeve; 222: a double-layer plug-in pipe body; 223: a diameter adjusting piece; 224: an elastic limiting piece; 2221: an inner ring tube body; 2222: an outer ring tube body.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

The technical solution provided by the present utility model will be described in detail by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model. In some instances, some embodiments are not described or described in detail as such, as may be known or conventional in the art.

Furthermore, features described herein, or steps in all methods or processes disclosed, may be combined in any suitable manner in one or more embodiments in addition to mutually exclusive features and/or steps. It will be readily understood by those skilled in the art that the steps or order of operation of the methods associated with the embodiments provided herein may also be varied. Any order in the figures and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated that a certain order is required.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein, where appropriate (without making up a paradox), include both direct and indirect connections (couplings).

The following detailed description refers to the accompanying drawings.

Example 1

The utility model provides a tightening device torque measurement and calibration tool which comprises a workbench 1, a reducing limiting unit 2, a first transmission module 3, a second transmission module 4, a conversion head 5, a real-time torque sensing unit 6, a translation supporting limiting unit 7 and a tightening device 8 to be measured.

According to a specific embodiment shown in fig. 1, a transmission mechanism and a limiting mechanism are arranged on the workbench 1 in a partitioned manner. The limiting mechanism can be used for positioning and mounting the test bolt, the test nut and the to-be-tested tightening device 8. The transmission mechanism can be used for transmitting torque among the to-be-tested tightening device 8, the real-time torque sensing unit 6 and the test bolt, so that the torque value generated by the to-be-tested tightening device 8 and monitored by the real-time torque sensing unit 6 can be transmitted. The transmission mechanism comprises a first transmission module 3, a second transmission module 4 and a conversion head 5. The limiting mechanism comprises a translation supporting limiting unit 7 and a reducing limiting unit 2. A real-time torque sensor unit 6 is arranged between the first transmission module 3 and the second transmission module 4, which can collect torque values with dynamic changes in the synchronous transmission process. The reducing limiting unit 2, the conversion head 5, the second transmission module 4, the real-time torque sensing unit 6, the first transmission module 3 and the translational supporting limiting unit 7 are orderly arranged on the workbench 1. The to-be-tested tightening device 8 which can be in transmission butt joint with the first transmission module 3 is installed on the translation supporting and limiting unit 7 in a limiting mode, so that the real-time torque sensing unit 6 can continuously transmit and collect the torque output by the first transmission module 3.

Preferably, the reducing stop unit 2 includes a stop support block 21 and a reducing clamp 22. The limit support block 21 is detachably mounted on the table 1. The reducing clamp 22 is arranged on the surface of the limit support block 21 facing the second transmission module 4. The limiting support block 21 is provided with a through hole 211 communicating with the diameter-changing hole of the diameter-changing holder 22. Preferably, the limiting support block 21 is arranged in a manner that the limiting support block 21 can slide on the workbench 1 in a directional manner, so that the limiting support block 21 can drive the test nut clamped by the reducing clamping piece 22 to translate in a directional manner along with the rotation of the test bolt when the test nut is in threaded connection with the test bolt, so that the position of the test nut on the test bolt is changed. Further preferably, the variable diameter clamp 22 is used for limiting and installing the test nut in a manner of adjusting the aperture size of the defined variable diameter hole and overlapping the axis of the test nut and the variable diameter hole. Specifically, the reducing clamp 22 includes a connection sleeve 221, a double-layer insertion tube 222, and a diameter adjuster 223. The connecting sleeve 221 is installed at the side of the limit supporting block 21, and a double-layer insertion pipe body 222 is inserted at one side of the connecting sleeve 221 away from the limit supporting block 21. Preferably, the end of the double-layer insertion tube 222 inserted into the connection sleeve 221 is also rotatably connected with a diameter-adjusting member 223 penetrating through the inner ring tube 2221 thereof. The diameter-adjusting piece 223 can rotate around the rotating connecting rod at the connecting edge between the diameter-adjusting piece 223 and the connecting sleeve 221, so that the size of the plate body of the inner ring pipe body 2221 is changed, and the cross section size of the test nut which is defined by the inner ring pipe body 2221 and can be inserted and limited in the pipe body can be changed by the symmetrical diameter-adjusting piece 223. In addition, the reducing limiting unit 2 can position and clamp the test nut, so that the test nut can assist in simulating a real screwing process, and the authenticity and accuracy of detection data are higher. In addition, the reducing limiting unit 2 can eliminate the interference of the relative movement of the test bolt and the test nut, so that the test nut and the test bolt can stably acquire the torque output by the to-be-tested tightening device in the torque transmission process.

As shown in fig. 2, the diameter-adjusting member 223 can be deflected by the restriction of the end of the connection sleeve 221 as the inner ring tube 2221 gradually goes deep into the inside of the connection sleeve 221, so that more plate body thereof is deflected into the inner ring tube 2221. The outer ring tube 2222 of the double-layer plug tube 222 is sleeved on the connecting sleeve 221, and the end of the tube is also rotationally connected with a sliding block capable of circumferentially sliding on the inner side wall of the tube of the outer ring tube 2222, and the sliding block can assist in limiting the relative translation distance and the relative position of the double-layer plug tube 222 and the connecting sleeve 221 when in relative rotation. Specifically, the diameter-adjusting member 223 is adjustably disposed at the edge of the plate body of the inner lumen of the inner ring tube 2221, and is provided with a stepped clamping groove, so that it can stably support the test nut against the positioning space defined by the inner ring tube 2221 and the connecting sleeve 221. Further preferably, the connecting shaft of the diameter-adjusting member 223 rotatably connected with the inner ring tube 2221 is further sleeved with an elastic limiting member 224. Specifically, the elastic limiting member 224 can define a relative initial position between the diameter-adjusting member 223 and the inner ring tube 2221, so that when the inner ring tube 2221 is partially moved out of the connection sleeve 221, the diameter-adjusting member 223 can deflect under the resilience force of the elastic limiting member 224 to move a part of the plate body to the outer side of the inner ring tube 2221. Preferably, the spring limiter 224 is a torsion spring. According to the utility model, the diameter adjusting pieces 223 are circumferentially arranged at intervals on the circumference defined by the inner ring pipe body 2221, so that when the diameter adjusting pieces are pushed by the connecting sleeve 221 to shift into the inner ring pipe body 2221, more plate bodies shift into the inner ring pipe body 2221 along with deepening of the rotation depth of the inner ring pipe body 2221, and therefore, the diameter adjusting pieces 223 can better define test nuts with different sizes, and the device is convenient for measuring and calibrating torque of a tightening device by utilizing bolts and nuts with different sizes.

Preferably, the side of the second transmission module 4 facing the reducing limiting unit 2 is detachably connected with a converting head 5 having various specifications. Specifically, the conversion head 5 is inserted with a test bolt capable of being abutted with the test nut clamped by the variable diameter clamping member 22, so that the rotation torque transmitted at the conversion head 5 can force the test bolt to be controllably turned into the test nut. The adapter 5 is a double-ended connection with a variable diameter, having different specifications for the connection of test bolts of different sizes.

Preferably, the second transmission module 4 comprises a second transmission connection shaft 41, a second transmission support seat 42 and a second rotation limiter 43 defining the position and the movable manner of the second transmission connection shaft 41 inside the second transmission support seat 42. Further preferably, the second transmission connecting shaft 41 is inserted into the inner ring of the second rotation limiter 43. The outer ring of the second rotation limiting part 43 is sleeved with a second transmission supporting seat 42. The second transmission connection shaft 41 is rotatable about its axis on a support height defined by the second transmission support base 42. Preferably, the axis of the second drive connection shaft 41 is coincident with the axis of the conversion head 5, so that both can effectively transmit rotational torque.

Preferably, the second drive connection shaft 41 is connected to the load shaft 61 of the real-time torque sensor unit 6 by a shaft cap at the end remote from the switching head 5. The end of the force-measuring shaft 61 remote from the second transmission connecting shaft 41 is also connected with the first transmission connecting shaft 31 of the first transmission module 3. Specifically, the real-time torque sensing unit 6 includes a power shaft 61, a torque sensing monitoring unit 62, and a data display unit 63. The force-measuring shaft 61 penetrates the housing of the torque-sensing and monitoring unit 62, and it can be monitored in real time by the torque-sensing and monitoring unit 62 for the rotational torque value during the transmission thereof. Further preferably, the torque sensing monitoring unit 62 is electrically connected to the data display unit 63 through a wire. Preferably, torque sensing monitoring unit 62 may be a GTS200 rotary dynamic torque sensor. According to the utility model, the dynamic torque sensor is adopted, so that the dynamic torque sensor can synchronously rotate along with the rotation output by the to-be-tested tightening device 8, and the torque sensor can be connected with the output end of the to-be-tested tightening device 8 through the first transmission connecting shaft 31, so that the torque transmitted between the torque sensor monitoring unit 62 and the to-be-tested tightening device 8 has no energy loss and driving buffering, and the torque sensor monitoring unit 62 can more accurately acquire the truest torque value output by the to-be-tested tightening device 8. Compared with a static torque sensing detection mechanism arranged at the tail end of the test bolt, the device can monitor the torque value in a simulated real bolt tightening state, so that the detection and calibration of the tightening device can be effectively carried out.

Preferably, the end of the first transmission connection shaft 31 remote from the force-measuring shaft 61 is provided with a bolt head structure, so that it can be in transmission abutment with the output end of the to-be-measured fastener 8 to transmit the rotational movement output by the to-be-measured fastener 8. Preferably, the first transmission module 3 comprises a first transmission connection shaft 31, a first transmission support seat 32 and a first rotation limiter 33 defining the position and the movable way of the first transmission connection shaft 31 inside the first transmission support seat 32. Preferably, the first rotation limiter 33 is adapted with a bearing element. Further preferably, the inner ring of the first rotation limiter 33 is inserted with the first transmission connecting shaft 31. The outer ring of the first rotation limiting part 33 is sleeved with a first transmission supporting seat 32. The first transmission connection shaft 31 is rotatable about its axis on a support height defined by the first transmission support base 32. Preferably, the axis of the first drive connection shaft 31 is coincident with the axis of the load shaft 61, so that both can effectively transmit rotational torque.

Preferably, the translational support limiting unit 7 includes a mounting frame 71, a limiting member 72, a translational block 73, and a limiting guide rail 74. The limit rail 74 is mounted on the table 1, and the mounting frame 71 can define the connection state and the relative position between the to-be-measured fastener 8 and the first transmission connection shaft 31. The mounting frame 71 is capable of following the translational block 73 in an oriented translation in the direction defined by the curb rail 74. Preferably, the side edges of the mounting frame 71 are provided with a means for limiting the relative position of the screw 8 to be measured when inserted in the frame thereof, so that the screw 8 to be measured can stably transmit the torsion force to the first transmission module 3 under the limitation of the translation supporting and limiting unit 7.

Preferably, the second transmission module 4 is connected with the workbench 1 through the translation mechanism 9, so that the translation mechanism 9 can drive the second transmission module 4 to perform directional translation to change the distance between the second transmission module 4 and the conversion head 5 and between the second transmission module 4 and the real-time torque induction unit 6, and accordingly the tool can install the real-time torque induction units 6 and test bolts with different lengths according to actual detection and calibration requirements, and the application range of the tool to different tightening devices 8 to be tested is improved.

The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims (10)

1. The torque measurement and calibration tool for the tightening device comprises a workbench (1) for installing a transmission mechanism and a limiting mechanism, and is characterized in that,

the transmission mechanism comprises a first transmission module (3), a second transmission module (4) and a conversion head (5),

the limiting mechanism comprises a translation supporting limiting unit (7) and a reducing limiting unit (2), wherein,

a real-time torque sensing unit (6) which can collect a torque value with dynamic change in the synchronous transmission process is arranged between the first transmission module (3) and the second transmission module (4),

reducing spacing unit (2), adapter (5), second transmission module (4), real-time moment of torsion sensing unit (6), first transmission module (3) and translation support spacing unit (7) are in order on workstation (1), and translation support spacing unit (7) go up spacing install can with screw up ware (8) that awaits measuring of transmission butt joint is carried out to first transmission module (3), make real-time moment of torsion sensing unit (6) can last the transmission and gather by the moment of torsion of first transmission module (3) output.

2. The tightening torque measurement calibration fixture according to claim 1, wherein the reducing limiting unit (2) comprises a limiting support block (21) and a reducing clamping piece (22), wherein the limiting support block (21) is detachably mounted on the workbench (1),

the reducing clamping piece (22) is arranged on the surface of the limiting support block (21) facing the second transmission module (4), a through hole (211) communicated with the reducing hole of the reducing clamping piece (22) is arranged on the limiting support block (21),

the variable diameter clamping piece (22) is used for limiting and installing the test nut according to the mode of adjusting the aperture size of the defined variable diameter hole and overlapping the axis of the test nut and the axis of the variable diameter hole.

3. The tool for measuring and calibrating torque of a tightening device according to claim 2, wherein the reducing clamp (22) comprises a connecting sleeve (221), a double-layer plug-in pipe body (222) and a diameter adjusting piece (223), wherein,

the connecting sleeve (221) is arranged on the side surface of the limiting support block (21), the double-layer inserting pipe body (222) is inserted into one side of the connecting sleeve (221) far away from the limiting support block (21),

the end part of the double-layer insertion pipe body (222) inserted into the connecting sleeve (221) is further rotationally connected with the diameter adjusting piece (223) penetrating through the inner ring pipe body (2221), and the diameter adjusting piece (223) can rotate around the connecting edge between the diameter adjusting piece and the connecting sleeve (221).

4. A tightening device torque measurement and calibration tool according to claim 3, wherein an elastic limiting member (224) is further sleeved on a connecting shaft rotationally connected with the inner ring pipe body (2221) by the diameter adjusting member (223), and the elastic limiting member (224) can limit the relative initial position between the diameter adjusting member (223) and the inner ring pipe body (2221), so that when the inner ring pipe body (2221) is partially moved out of the connecting sleeve (221), the diameter adjusting member (223) can deflect under the resilience acting force of the elastic limiting member (224) to move part of the plate body to the outer side of the inner ring pipe body (2221).

5. The tightening torque measurement calibration fixture according to claim 4, characterized in that the side of the second transmission module (4) facing the reducing limiting unit (2) is detachably connected with the conversion head (5), and a test bolt capable of being in butt joint with a test nut clamped by the reducing clamping piece (22) is inserted onto the conversion head (5), so that the rotation torque transmitted by the conversion head (5) can force the test bolt to controllably rotate into the test nut.

6. The tightening torque measurement calibration fixture according to claim 5, characterized in that the second transmission module (4) comprises a second transmission connection shaft (41), a second transmission support seat (42) and a second rotation limiter (43) defining the position and the movement of the second transmission connection shaft (41) within the second transmission support seat (42);

the second transmission connecting shaft (41) is inserted into the inner ring of the second rotation limiting part (43), and the second transmission supporting seat (42) is sleeved on the outer ring of the second rotation limiting part (43).

7. The tightening tool torque measurement and calibration tool according to claim 6, wherein an axle cap of an end of the second transmission connecting shaft (41) far away from the conversion head (5) is connected with a force measuring shaft (61) of the real-time torque sensing unit (6), and a first transmission connecting shaft (31) of the first transmission module (3) is further connected to an end of the force measuring shaft (61) far away from the second transmission connecting shaft (41).

8. The tightening torque measurement calibration fixture according to claim 7, characterized in that the real-time torque sensing unit (6) comprises the load shaft (61), a torque sensing monitoring unit (62) and a data display unit (63), the load shaft (61) penetrating the housing of the torque sensing monitoring unit (62) and being capable of being monitored in real time by the torque sensing monitoring unit (62) for rotational torque values during transmission thereof;

the torque sensing monitoring unit (62) is electrically connected with the data display unit (63) through a wire.

9. The tightening device torque measurement calibration fixture according to claim 8, characterized in that one end of the first transmission connecting shaft (31) far away from the force measuring shaft (61) is provided with a bolt head structural member, so that the bolt head structural member can be in transmission butt joint with the output end of the tightening device (8) to be measured so as to transmit the rotation motion output by the tightening device (8) to be measured.

10. The tightening torque measurement calibration fixture according to claim 9, characterized in that the translational support limit unit (7) comprises a mounting frame (71), a limit piece (72), a translational block (73) and a limit guide rail (74), the limit guide rail (74) being mounted on the table (1), the mounting frame (71) being capable of following the translational block (73) in an oriented translation in a direction defined by the limit guide rail (74).