CN210196873U - Bridge strain gauge adjusting and positioning device - Google Patents

Abstract

The utility model discloses a bridge strain gauge adjusting and positioning device, which comprises a supporting seat and a lock shaft bracket, wherein the supporting seat comprises a base, a supporting plate and a driving mechanism, the lock shaft bracket comprises a bracket body, an end cover, a spiral disc ring and a plurality of limiting parts, the bracket body is positioned on the supporting plate, the spiral disc ring is rotatably connected on the side surface of the bracket body, the end cover is covered on the side surface of the bracket body where the spiral disc ring is positioned, the spiral disc ring is limited between the end cover and the bracket body, the end cover and the bracket body are both provided with through holes, the through holes and the limiting parts are both provided with sliding cavities, the surface of the spiral disc ring facing the end cover is provided with threads, one ends of the limiting parts are provided with threads, the end cover is provided with sliding holes, the sliding holes are distributed on the same circumference around the axis of the through holes and extend along the diameter direction of the spiral disc ring, one ends of the limiting, the other end is positioned outside the end cover, so that the problem of small application range of the positioning device of the existing bridge strain gauge is solved.

Description

Bridge strain gauge adjusting and positioning device

Technical Field

The utility model relates to a bridge check out test set field, more specifically the utility model relates to a positioner is adjusted to bridge strain gauge that says so.

Background

The strain refers to the local relative deformation of an object under the action of factors such as external force, a non-uniform temperature field and the like, and the strain of the bridge is an important factor influencing the strength of the bridge, so that the strain detection of the bridge is very important. The prior patent with the application number of '201821056383.4' is improved on the prior basis, a bridge strain detection device capable of adjusting the tightness degree of steel strings to adjust the measuring range is designed, in this patent, it is mentioned that the first sleeve and the second sleeve are respectively limited in two supporting blocks, and in order to ensure the position stability of the adjusting sleeve, it is also mentioned that a positioning block is used to assist the making of the adjusting sleeve, the patent makes up the deficiency that the prior art can not adjust the measuring range, but still has the defect that when the first sleeve or the second sleeve with different specifications is used, the position of the axle center of the first sleeve or the second sleeve can be changed, so that supporting blocks with different specifications are required to be used, the supporting block of this patent shape structure is fixed promptly, can only supply the first sleeve section of thick bamboo of a specification or the second sleeve section of thick bamboo to pass, and application scope is little, needs design a section can compensate the adjusting and positioning device of the defect of supporting block in this patent.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a can just be applicable to the bridge strain gauge's of multiple specification regulation positioner according to freely adjusting.

In order to achieve the above purpose, the utility model provides a following technical scheme: a bridge strain gauge adjusting and positioning device is used for assisting in positioning a bridge strain gauge, an axial boss is arranged on the outer wall of the bridge strain gauge and comprises a supporting seat and a lock shaft frame, the supporting seat comprises a base, a supporting plate only capable of sliding up and down relative to the base and a driving mechanism used for driving the supporting plate to slide relative to the base, the lock shaft frame comprises a frame body, an end cover, a spiral ring and a plurality of limiting parts, the frame body is positioned on the supporting plate, the spiral ring is rotatably connected to the side surface of the frame body, the end cover covers the side surface of the frame body where the spiral ring is positioned, the spiral ring is limited between the end cover and the frame body, through holes coaxial with the spiral ring are formed in the end cover and the frame body, sliding cavities capable of accommodating the boss and allowing the boss to slide are formed in the through holes and the limiting parts, threads are arranged on the surface of the spiral ring facing the end cover, a plurality of one of locating part is served to be provided with spiral shell ring assorted screw thread, the slide opening that just supplies the locating part to pass is seted up with a plurality of locating part one-to-one to the end cover, a plurality of the slide opening distributes on same circumference and slide opening along spiral shell ring diameter direction extension around the through-hole axle center, a plurality of locating part line screwed one end is spacing between end cover and spiral shell ring, and the other end is located outside the end cover, thereby drives the relative base of backup pad through adjusting actuating mechanism and removes and make the high meet the requirements of through-hole, rotates through the relative support body of spiral shell ring and makes spiral shell ring encircle to move a plurality of locating part and remove along the slide opening simultaneously.

As the utility model discloses a further improvement, actuating mechanism including a driving shaft, with the driving shaft meshing from driving wheel, interior axle and outer axle, interior axle sleeve locates outer interior and interior axle and outer axle threaded connection, the bottom surface of interior relative base of axle sets up perpendicularly and the base is rotatory relatively, set up in interior epaxially from the driving wheel with one heart, the outer one end and the backup pad fixed connection of keeping away from the pedestal bottom surface, the driving shaft rotates and connects on the base, when the driving shaft rotates, rotates from the relative base of interior axle drive, and outer axle drives the relative base of backup pad and reciprocates.

As a further improvement, the utility model is provided with a gear shaft rotatably connected in the supporting plate, be provided with on the anchor ring of spiral shell ring with gear shaft intermeshing's driving gear.

As a further improvement, the utility model also comprises a handle, the one end of gear shaft and the one end of driving shaft all are provided with can dismantle the draw-in groove of being connected with the handle.

As the utility model discloses a further improvement, a plurality of the locating part is used for articulating on the position that offsets with the bridge strain gauge has a rolling member, a plurality of the rolling member all offsets with the bridge strain gauge, and when the relative support body of bridge strain gauge removed, the relative bridge strain gauge of rolling member rolled.

The utility model has the advantages that: through set up the backup pad that reciprocates in the base, set up actuating mechanism between base and backup pad, and set up the lock pedestal in the backup pad, relative support body rotates the spiral shell ring and makes a plurality of locating part be close to or keep away from to the axis of through-hole simultaneously, thereby realize locking and removing the locking to the bridge strain gauge, can adjust the height of lock pedestal through actuating mechanism, can clip the bridge strain gauge of different specifications through spiral shell ring and locating part, so design, the utility model discloses a simple mechanical relation and regulation mode can be applicable to the bridge strain gauge of different specifications and be in the bridge strain gauge of co-altitude, have compensatied the not enough of the supporting shoe in the application number is "201821056383.4" patent and the current not enough of the auxiliary member that is used for supporting the bridge strain gauge.

Drawings

FIG. 1 is a front sectional view of the utility model with a handle inserted into a driving shaft;

FIG. 2 is a right sectional view of the handle of the present invention inserted into the gear shaft;

FIG. 3 is a view A-A of FIG. 1;

FIG. 4 is a front cross-sectional view of the present invention with the end cap and the stop member removed;

fig. 5 is a view of the present invention in actual use.

Reference numerals: 1. a supporting seat; 11. a base; 12. a support plate; 13. a drive mechanism; 14. a gear shaft; 15. a drive shaft; 16. a driven wheel; 17. an inner shaft; 18. an outer shaft; 19. a card slot; 2. a shaft locking frame; 21. a frame body; 22. an end cap; 23. a spiral ring; 24. a limiting member; 25. a through hole; 26. a slide hole; 27. a transmission gear; 3. a handle; 4. a rolling member; 5. a boss; 6. a sliding cavity; 7. a fastener; 8. a positioning column; 81. a bump; 9. and (4) a column groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 5, the bridge strain gauge adjusting and positioning device of the present embodiment is used for assisting in positioning a bridge strain gauge, where the bridge strain gauge is referred to as a sleeve in the patent with the application number "201821056383.4", an axial boss 5 is provided on an outer wall of the bridge strain gauge, and in order to make up for a defect of a support block in the patent with the application number "201821056383.4", an adjusting and positioning device capable of replacing the support block is designed as follows;

the locking device comprises a supporting seat 1 and a locking shaft frame 2, wherein the supporting seat 1 comprises a base 11, a supporting plate 12 which can only slide up and down relative to the base 11 and a driving mechanism 13 for driving the supporting plate 12 to slide relative to the base 11, the locking shaft frame 2 comprises a frame body 21, an end cover 22, a spiral disc ring 23 and a plurality of limiting parts 24, a part of the base 11 is dug out to form a groove in the production and manufacturing process, the driving mechanism 13 is arranged in the groove, the driving mechanism 13 has various structures, for example, the driving mechanism 13 can be an air cylinder or a push rod motor in the prior art, the air cylinder or the push rod motor is positioned in the groove, the output end of the air cylinder or the push rod motor is fixedly connected with the supporting plate 12 and can drive the supporting plate 12 to move up and down relative to the base 11, or the driving mechanism 13 adopts a new structural design, and the details of; a through hole 25 for the bridge strain gauge to pass through is formed in one side wall of the frame body 21, a thread which is coaxially arranged with the circular ring disc is engraved on the end face of the circular ring disc so as to form a spiral disc ring 23, a groove for placing the spiral disc ring 23 is coaxially arranged on the side wall of the frame body 21 relative to the through hole 25, the spiral disc ring 23 can rotate relative to the frame body 21, the number of the plurality of limiting parts 24 is determined to be three, the three limiting parts 24 respectively comprise a sliding block, a sliding rod and a chuck, the sliding block is fixedly connected to one end of the sliding rod, a thread which is matched with the spiral disc ring 23 is threaded on the surface of the sliding block, which is far away from the sliding rod, the three limiting parts 24 are uniformly distributed on the same circumference around the axis of the through hole 25, the spiral disc ring 23 is in a face-up manner, the thread on the sliding block is matched with the thread on the spiral disc ring 23, the end cover 22 is also, the slide hole 26 extends along the diameter direction of the screw disc ring 23, the end cover 22 is covered on the side wall of the frame body 21 where the screw disc ring 23 is located, one end of the slide rod passes through the slide hole 26, when the end cover 22 is covered in place, the slide block and the screw disc ring 23 are sequentially limited between the end cover 22 and the frame body 21, the chucks are clamped on one end of the slide rod outside the end cover 22, the three chucks all extend along the radial direction of the screw disc ring 23 and all extend towards the axis of the through hole 25, the through hole 25 and the limiting piece 24 comprise a slide cavity 6 capable of accommodating the boss 5 and allowing the boss 5 to slide, for simple and convenient processing, the boss 5 is one, the slide cavity 6 is also one, one of the three limiting pieces 24 is provided with the slide cavity 6, the slide cavity 6 on the through hole 25 and the slide cavity 6 on the limiting piece 24 are all located on the same straight line, after the shaft frame body 2 is locked, the frame body 21 is positioned on the support plate, the through hole 25 can be eccentrically arranged relative to the frame body 21 so that the edge of the screw ring 23 is partially exposed out of the frame body 21;

in the using process, firstly, the edge of the spiral ring 23 exposed outside the frame body 21 is pushed by fingers to make the spiral ring 23 rotate relative to the frame body 21, the position-limiting part 24 moves along the lines of the spiral ring 23, because the sliding hole 26 limits the position-limiting part 24 to move along the circumference of the end cover 22, the position-limiting part 24 moves along the sliding hole 26 linearly, a plurality of position-limiting parts 24 all move towards the edge of the end cover 22, the bridge strain gauge is placed on the position-limiting part, the utility model is positioned on the steel plate where the position-limiting part is positioned, and the utility model is positioned in the length direction of the bridge strain gauge, the utility model is close to the end part of the bridge strain gauge, namely, the axis of the through hole 25 and the axis of the bridge strain gauge are positioned in the same vertical plane, a scale mark can be marked on the bridge strain gauge and the end cover 22, the distance from the scale mark on the bridge strain gauge to the steel, the distance from the scale mark on the end cover 22 to the surface of the steel plate is the distance from the axis of the through hole 25 to the surface of the steel plate, the distance from the scale mark on the bridge strain gauge to the surface of the steel plate can be measured by the ruler, the ruler is moved to one side of the utility model, the support plate 12 is driven by controlling the driving mechanism 13 to move up and down relative to the base 11 until the scale mark on the end cover 22 and the scale mark previously measured by the ruler are in the same horizontal plane, the scale mark on the end cover 22 and the scale mark on the bridge strain gauge are in the same horizontal plane, so that the axis of the through hole 25 and the axis on the bridge strain gauge are in the same straight line, the alignment operation of the through hole 25 and the bridge strain gauge is completed, the driving mechanism 13 stops driving the support plate 12 to move relative to the base 11, the base 11 is pushed to move axially along the bridge strain gauge, the screw ring 23 is reversely pushed by fingers to be exposed out of the edge of the frame body 21, the screw ring 23 rotates relative to the frame body 21, the screw ring 23 drives the plurality of limiting parts 24 to approach to the axis of the through hole 25 at the same time until the plurality of limiting parts 24 all abut against the outer wall of the bridge strain gauge, the force application to the screw ring 23 is stopped, at the moment, the boss 5 is matched with the sliding cavity 6 on the limiting part 24, the abutting of the limiting part 24 and the bridge strain gauge is not equal to the clamping of the limiting part 24 on the bridge strain gauge, the bridge strain gauge can be ensured to slide relative to the limiting part 24, the assembly between the bridge strain gauge and the adjusting sleeve can be completed, after the assembly is completed, the adjusting sleeve is rotated, because the boss 5 is clamped with the sliding cavity 6, both ends of the bridge strain gauge axially slide relative to the through hole 25, after the use, the screw ring 23 can be pulled to enable the limiting part 24 to be far away from the bridge strain, from the above operation, it can be easily obtained that the maximum diameter of the bridge strain gauge supported by the present invention is the diameter of the through hole 25, and the minimum diameter is the diameter of the circumference where the ends of the plurality of chucks close to the axis center are located when the plurality of position-limiting members 24 all move to the end of the sliding hole 26 close to the axis center of the through hole 25;

further, the utility model can be used for the existing bridge strain gauge, the existing bridge strain gauge can be passed through the through hole 25, and the spiral ring 23 is rotated to clamp the bridge strain gauge by the plurality of limiting parts 24, thereby ensuring the stability of the existing bridge strain gauge, if the existing bridge strain gauge does not have the boss 5, the sliding cavity 6 provided by the utility model can be optionally provided, and the existing bridge strain gauge is manufactured by a manufacturer according to the actual requirement; in order that the base 11 does not deviate when moving along the axial direction of the bridge strain gauge, convex strips can be arranged on the steel plate, grooves matched with the convex strips are formed in the base 11, the convex strips extend towards the positioning blocks, bolts are screwed on the groove walls of the grooves, when the base 11 moves in place, the bolts can be screwed down to fix the base 11 relative to the steel plate, and the stability of the base 11 is improved;

as designed above, the utility model discloses a simple mechanical relation and regulation mode and can be applicable to the bridge strain gauge of different specifications and be in not co-altitude bridge strain gauge, compensate the not enough of supporting shoe and the not enough of the auxiliary member that is used for supporting bridge strain gauge in the current in the application number for "201821056383.4" patent.

As an improved specific embodiment, referring to fig. 1 to 4, the driving mechanism 13 includes a driving shaft 15, a driven wheel 16 engaged with the driving shaft 15, an inner shaft 17 and an outer shaft 18, a groove 9 may be formed on a groove wall of the base 11, a positioning post 8 matched with the groove 9 extends from a surface of the supporting plate 12 facing the base 11, one end of the outer shaft 18 is fixedly connected with the supporting plate 12, a tapping is performed on an end surface of the other end toward the outer shaft 18, an inner thread is engraved on an inner wall of the outer shaft 18, an outer thread matched with the inner thread is engraved on an outer wall of the inner shaft 17, the outer shaft 18 and the inner shaft 17 are connected together by a screw, the driven wheel 16 is disposed on an end of the inner shaft 17 away from the outer shaft 18, the driven wheel 16 may be integrally formed with the inner shaft 17, the driven wheel 16 forms a gear shaft together with the inner shaft 17, a hole for the driving shaft 15, the driving shaft 15 can be a worm, the driven wheel 16 can be a worm wheel, a limit disc can extend out of the worm, the worm is arranged in the base 11, one end of the worm penetrates out of a hole in the base 11 until the limit disc is abutted against the inner wall of the base 11, external threads are arranged on the part of the worm extending out of the base 11, a nut is screwed on the part of the worm, so that the driving shaft 15 is limited on the base 11 and can rotate relative to the base 11, the supporting plate 12 is aligned with the base 11 for installation, the positioning column 8 extends into the column groove 9, the driven wheel 16 enters the base 11 until the driven wheel 16 is meshed with the driving shaft 15 in place and the end part of the inner shaft 17 is abutted against the base 11, a disc body with a larger diameter extends out of the end part of the inner shaft 17, a sheet body for preventing the inner shaft 17 and the base 11 from being away from each other is arranged on the bottom surface of the inner cavity of, because the positioning column 8 on the supporting plate 12 is eccentrically arranged relative to the outer shaft 18 and the positioning column 8 is clamped with the column groove 9, the supporting plate 12 cannot rotate relative to the base 11, the outer shaft 18 and the inner shaft 17 rotate relative to each other, the supporting plate 12 is adjusted to move to the position of the upper port of the base 11, when the device is used, the driving shaft 15 can be rotated to drive the driven wheel 16 to rotate, and the inner shaft 17 rotates relative to the outer shaft 18 to enable the supporting plate 12 to move up and down relative to the base 11, the design is optimized for the first embodiment, compared with a push rod motor or an air cylinder, the production cost can be reduced, mechanical transmission control can be freely controlled according to the consciousness of a user, the operation;

further optimize, as shown in fig. 2, can extend out the lug 81 on reference column 8, can install fastener 7 at the opening part of post groove 9, set up the notch that matches with reference column 8 on this fastener 7, lug 81 can offset and can't shift out post groove 9 with fastener 7 when removing to fastener 7 department promptly, fastener 7 is spacing lug 81 in the space below fastener 7 place height, the design of fastener 7 is used for doing a limited maximum height for moving up in the backup pad 12, avoid the condition that breaks away from each other between outer axle 18 and the interior axle 17.

As a modified specific embodiment, referring to fig. 2 and 4, a gear shaft 14 is rotatably connected to the support plate 12, the ring surface of the spiral ring 23 is provided with a driving tooth 27 meshed with the gear shaft 14, and if the gear shaft 14 is parallel to the axis of the through hole 25, the meshed relationship between the spiral ring 23 and the gear shaft 14 is the same as the meshed relationship between two gears in the prior art; if the axes of the gear shaft 14 and the through hole 25 are perpendicular to each other, the meshing relationship between the gear shaft 14 and the spiral ring 23 is the same as the meshing relationship between two bevel gears in the prior art, the former is preferred in two modes, the structure is simple, the occupied space is small, a disc body can extend out from the peripheral wall of the gear shaft 14, the support plate 12 consists of two plates which are spliced with each other, grooves for accommodating the disc body are formed in the two plates, the gear shaft 14 is arranged on one plate, the other plate is covered above the gear shaft 14, the gear shaft 14 is limited on the support plate 12 and can rotate relative to the support plate 12, when the rack body 21 is arranged on the support plate 12, teeth on the gear shaft 14 extend into the space between the rack body 21 and the end cover 22 and are meshed with the transmission teeth 27, compared with the design, the spiral ring 23 is eccentrically arranged and partially exposed out of the rack body 21, so that, avoid external impurity to get into between end cover 22 and the spiral shell ring 23 and influence the condition of the line on the spiral shell ring 23, compare simultaneously and directly go to the edge of pushing away spiral shell ring 23 with the hand, the operation mode of this embodiment is more convenient, more laborsaving.

As an improved specific embodiment, referring to fig. 1 to 5, the present invention further includes a handle 3, one end of the gear shaft 14 and one end of the driving shaft 15 are respectively provided with a clamping groove 19 detachably connected to the handle, a groove cavity of the clamping groove 19 is prism-shaped, the handle 3 includes a clamping block matching with the clamping groove 19, the clamping block is inserted into the clamping groove 19 and applies a torsional force to the handle 3 to drive the driving shaft 15 or the gear shaft 14 to rotate, end faces of the gear shaft 14 and the driving shaft 15 are both flush with a surface of an object on which the gear shaft 14 and the driving shaft 15 are located, so as to reduce a space occupied by the present invention, and compared with the case where the handle 9 is provided on both the gear shaft 14 and the driving shaft 15, the present embodiment improves safety, the handle 3 is used to sequentially control rotation of the driving shaft 15 and the gear shaft 14, and after the handle 3 is removed, both the gear shaft 14 and the driving shaft, the adjusted gear shaft 14 and the driving shaft 15 can not rotate randomly, and the adjusted stability of the whole device is further improved.

As an improved specific embodiment, referring to fig. 1 to 2, a plurality of limiting members 24 are hinged to rolling members 4 at positions abutting against the bridge strain gauge, the rolling members 4 can be divided into two types, the first type is that the rolling members 4 are wheels, and are hinged to the limiting members 4 through shafts, and similar to the roller structure of the existing trunk, the wheel surfaces abut against the bridge strain gauge; in the second category, the rolling member 4 is a sphere, and is connected to the position-limiting member 4 in a ball-hinged manner, which is similar to the ball mounting manner of the pen point of the existing middle ball pen, the spherical bridge strain gauges are abutted, the number of the rolling members 4 is determined according to the actual requirement, and the sliding friction between the position-limiting member 24 and the bridge strain gauges in the previous embodiment is changed into the rolling friction by the design of the rolling member 4, so that the bridge strain gauges can slide relative to the position-limiting member 24.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides a positioner is adjusted to bridge strain gauge for assistance-localization real-time bridge strain gauge is provided with axial boss (5), its characterized in that on bridge strain gauge's the outer wall: including supporting seat (1) and lock pedestal (2), supporting seat (1) including base (11), backup pad (12) that can only slide from top to bottom relative base (11) and be used for driving actuating mechanism (13) that backup pad (12) slided relative base (11), lock pedestal (2) are including support body (21), end cover (22), spiral shell ring (23) and a plurality of locating part (24), support body (21) are fixed a position on backup pad (12), spiral shell ring (23) rotatable coupling is on the side of support body (21), end cover (22) lid fits on the side of spiral shell ring (23) place support body (21), spiral shell ring (23) are spacing between end cover (22) and support body (21), through-hole (25) with spiral shell ring (23) coaxial setting are all seted up to end cover (22) and support body (21), all wrap up boss (5) and supply to hold boss (5) and slide on through-hole (25) and locating part (24), and supply to hold boss (5) and slide The portable sliding device comprises a sliding cavity (6) which is in a row, wherein a thread and a plurality of threads are arranged on the face, facing an end cover (22), of a spiral disc ring (23), one end of a limiting part (24) is provided with threads matched with the spiral disc ring (23), the end cover (22) is provided with sliding holes (26) which are in one-to-one correspondence with the limiting parts (24) and allow the limiting parts (24) to pass through, the sliding holes (26) are distributed on the same circumference around the axis of a through hole (25), the sliding holes (26) extend along the diameter direction of the spiral disc ring (23), the threaded ends of the limiting parts (24) are limited between the end cover (22) and the spiral disc ring (23), the other ends of the sliding holes are located outside the end cover (22), a supporting plate (12) is driven to move relative to a base (11) through adjustment of the driving mechanism (13), so that the height of the through hole (25) meets requirements, and the spiral disc ring (23) drives the limiting parts (24) to simultaneously along the sliding holes along (26) And (4) moving.

2. The bridge strain gauge adjusting and positioning device according to claim 1, wherein: the driving mechanism (13) comprises a driving shaft (15), a driven wheel (16) meshed with the driving shaft (15), an inner shaft (17) and an outer shaft (18), the inner shaft (17) is sleeved in the outer shaft (18) and the inner shaft (17) is in threaded connection with the outer shaft (18), the inner shaft (17) is vertically arranged relative to the bottom surface of the base (11) and can rotate relative to the base (11), the driven wheel (16) is concentrically arranged on the inner shaft (17), one end, away from the bottom surface of the base (11), of the outer shaft (18) is fixedly connected with the supporting plate (12), the driving shaft (15) is rotatably connected onto the base (11), when the driving shaft (15) rotates, the driven wheel (16) drives the inner shaft (17) to rotate relative to the base (11), and the outer shaft (18) drives the supporting plate (12) to move up and down relative to the base.

3. The bridge strain gauge adjusting and positioning device according to claim 2, wherein: the supporting plate (12) is rotatably connected with a gear shaft (14), and the ring surface of the screw ring (23) is provided with transmission teeth (27) which are meshed with the gear shaft (14).

4. The bridge strain gauge adjusting and positioning device of claim 3, wherein: the gear shaft is characterized by further comprising a handle (3), and clamping grooves (19) detachably connected with the handle are formed in one end of the gear shaft (14) and one end of the driving shaft (15).

5. The bridge strain gauge adjustment positioning device according to claim 1 or 2 or 3 or 4, wherein: the bridge strain gauge is characterized in that the position, where the limiting part (24) is used for abutting against the bridge strain gauge, is hinged with a rolling part (4), the rolling part (4) abuts against the bridge strain gauge, and when the bridge strain gauge moves relative to the frame body (21), the rolling part (4) rolls relative to the bridge strain gauge.

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