CN110702296A

CN110702296A - Bolt detection device

Info

Publication number: CN110702296A
Application number: CN201911026285.5A
Authority: CN
Inventors: ***; 汪佳琪; 郭建虎; 詹嘉纬; 顾燕菁
Original assignee: Hangzhou Guohua Testing Technology Co Ltd
Current assignee: Hangzhou Guohua Testing Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-01-17
Anticipated expiration: 2039-10-25
Also published as: CN110702296B

Abstract

The invention discloses a bolt detection device, which solves the problem that the bolt detection device in the prior art cannot be adapted to bolts to be detected with different specifications and sizes, and has the technical key points that: the utility model provides a bolt detection device, including the mounting box, drive the screw rod, an axial dynamometry section of thick bamboo, the axial dynamometer, it is provided with and drives screw rod fixed connection's mounting panel to slide in the mounting box, it is provided with two sets of tight boards to slide on the mounting panel, still be provided with the driving piece on the mounting panel, the one end of keeping away from the axial dynamometer to the tight board is provided with the butt board that is close to another tight board perpendicularly, the one end that the axial dynamometer was kept away from to the mounting box is provided with the centre gripping subassembly, the centre gripping subassembly includes the grip block that two sets of intervals set up and is. Through the scheme, the mounting box can clamp and position the bolts to be tested with different specifications and sizes, and then detection is carried out.

Description

Bolt detection device

Technical Field

The invention relates to the technical field of bolt detection tools, in particular to a bolt detection device.

Background

In the building industry, the high-strength bolt connection technology for steel structures has been widely applied, and particularly in recent years, the trend of adopting the high-strength bolt connection technology in steel structures in the construction of industrial and civil facilities such as railways, highway bridges, boilers, industrial plants, high-rise civil buildings, hoisting machinery and the like is continuously expanding. Due to the wide application of the high-strength bolt connection technology, the mechanical properties and the product quality of the high-strength bolt have a great influence on the safety of various buildings, steel structures, heavy machinery and the like, so that in many application environments, each key performance parameter (for example, axial force and screwing torque) of the high-strength bolt needs to be detected to ensure the product quality and safety.

Referring to fig. 1, a bolt detection device commonly used in the prior art includes a mounting box 1 having an open top and a rectangular parallelepiped shape, a positioning block 2 slidably disposed in the mounting box 1 along a length direction of the mounting box 1, and a driving screw 3 having an axial direction identical to the length direction of the mounting box. The driving screw rod 3 vertically penetrates through the side wall of the mounting box along the horizontal direction and can freely slide, one end of the driving screw rod 3, which is positioned in the mounting box 1, is fixedly connected with the side wall of the positioning block 2, the driving screw rod 3 is provided with a thread structure in a winding manner, one end of the driving screw rod 3, which is positioned outside the mounting box 1, is provided with an axial force measuring cylinder 4 in a thread sleeve manner, an axial force measuring meter 5 which is sleeved outside the driving screw rod 3 is arranged between the axial force measuring cylinder 4 and the side wall of the mounting box 1, and the axial force measuring meter 5. Meanwhile, the side wall of the positioning block 2, which is far away from the axial dynamometer 5, is vertically and inwardly provided with a positioning groove 6, the section of the positioning groove 6 on the horizontal plane is in a T shape, and a guide hole 8 is formed in the side wall of the end part of the mounting box 1, which is far away from the axial dynamometer 5, in a penetrating manner. When the bolt that awaits measuring detects, place the bolt head that awaits measuring in the constant head tank 6 of locating piece 2, and make the tail end of the bolt that awaits measuring pass guiding hole 8 and stretch out mounting box 1, the tail end of the bolt that awaits measuring has push nut 9 at 1 external screw thread connection of mounting box, push nut 9 supports tightly with 1 outer wall of mounting box, when rotating push nut 9 to mounting box 1 one side, because relative motion, push nut 9 will drive the bolt that awaits measuring to continuously stretch out mounting box 1, thereby drive locating piece 2 and drive screw rod 3 and remove, axial dynamometry section of thick bamboo 4 will butt on axial dynamometer 5 this moment, axial dynamometer 5 can draw the axial force that the bolt that awaits measuring produced when removing.

But above-mentioned scheme is when the in-service use, because the constant head tank 6 and the guiding hole 8 space on the lateral wall of 1 tip of mounting box of placing the bolt that awaits measuring on the locating piece 2 is fixed, unable regulation, make its bolt specification that can measure very limited, the solution commonly used among the prior art is: when the bolt with the diameter smaller than the guide hole 8 is detected, a positioning plate 10 is designed according to the nut of the bolt head and is placed in the positioning groove 6, a nut groove 11 corresponding to the size of the nut is formed in the positioning plate 10, the axial direction of the nut groove 11 is consistent with that of the guide hole 8, and then the bolt head with the corresponding specification can be positioned during measurement, so that the measurement can be smoothly carried out. However, in this way, the corresponding positioning plate 10 must be manufactured in cooperation with each kind of bolt to be detected, so that the detection process is time-consuming and complicated, which is not beneficial to practical use, and finally, the detectable bolt specification is too small.

Disclosure of Invention

The invention aims to provide a bolt detection device capable of quickly and conveniently detecting axial force of bolts with different specifications.

The invention is realized by the following technical scheme:

a bolt detection device comprises a mounting box, a driving screw rod which is inserted into the mounting box in a sliding way, an axial force measuring cylinder which is sleeved outside the mounting box and is arranged on the driving screw rod in a threaded way, and an axial force measurer which is fixedly arranged between the axial force measuring cylinder and the outer wall of the mounting box, the mounting plate is arranged in the mounting box along the axial direction of the driving screw rod in a sliding way, one end of the mounting plate is fixedly connected with the driving screw rod, two groups of abutting plates are arranged on the mounting plate at intervals in parallel, the two groups of abutting plates are both parallel to the axial direction of the driving screw rod, the abutting plate is arranged on the mounting plate in a sliding manner, the sliding direction of the abutting plate is vertical to the axial direction of the driving screw rod, a driving piece for adjusting the position of the abutting plate is arranged between the abutting plate and the mounting plate, one end of the abutting plate, which is far away from the axial dynamometer, is vertically provided with an abutting plate close to the other abutting plate, and a gap for placing a bolt to be tested is reserved between the two groups of abutting plates; the mounting box is kept away from the one end of axial dynamometer is provided with the axial of controlling the bolt that awaits measuring and is on a parallel with drive the centre gripping subassembly of screw rod, the centre gripping subassembly includes the grip block that two sets of intervals set up and is used for controlling the regulating part of interval between two sets of grip blocks.

By adopting the technical scheme, the two groups of abutting plates are slidably arranged on the mounting plate, the sliding direction is vertical to the axial direction of the driving screw rod, so that the heads of the bolts to be tested can be clamped and abutted from two sides when needed, and further the limit is realized in the horizontal direction vertical to the axial direction of the driving screw rod, the abutting plate arranged at one end of the abutting plate far away from the axial dynamometer can abut against one surface of the heads of the bolts to be tested far away from the axial dynamometer when the bolts to be tested are placed between the two abutting plates, meanwhile, the clamping assembly can control the bolts to be tested to be axially parallel to the driving screw rod, so that the bolts to be tested can drive the mounting plate, the driving screw rod and the axial dynamometer to move when moving far away from the axial dynamometer, and further the axial dynamometer abuts against the axial dynamometer to realize the measurement, and the difference from the prior art is that the distance adjustment can be carried out under the action of the adjusting piece due to, the bolts with different sizes and specifications can be clamped and placed on the detection device conveniently and quickly, and detection cost is reduced while detection efficiency is improved.

Further setting the following steps: the projections of the surfaces of the two groups of abutting plates and the two groups of clamping plates on the axial section of the driving screw rod are surrounded to form a rectangle.

Through adopting above-mentioned technical scheme, utilize to support tight board and grip block to enclose to establish the centre gripping to driving the screw rod, realize that it can only drive the axial of screw rod and move.

Further setting the following steps: the supporting plate is perpendicular to the mounting plate, a sliding groove used for slidably mounting the supporting plate is formed in the mounting plate, the extending direction of the sliding groove is perpendicular to the axial direction of the driving screw rod, sliding blocks stretching into the sliding groove in a sliding mode are arranged at the bottoms of the two groups of supporting plates, and the driving piece drives the two groups of sliding blocks to synchronously move in the sliding groove in the opposite direction or move in the opposite direction.

Through adopting above-mentioned technical scheme, utilize the spout and support the sliding block of tight board bottom surface and realize that slidable mounting supports tight board on the mounting panel to further realize two sets of tight boards of supporting under the driving piece effect and carry out relative or back-to-back motion, and then make the bolt that awaits measuring of different specifications sizes can place, and carry out quick adjustment.

Further setting the following steps: the driving piece is a bidirectional threaded screw rod which is rotatably installed in the installation box, the bidirectional threaded screw rod vertically penetrates through the two groups of abutting plates, and the two groups of abutting plates are respectively in threaded fit with two sections of thread structures of the two groups of bidirectional threaded screw rods.

Through adopting above-mentioned technical scheme, utilize two-way screw lead screw quick synchronization regulation two sets of tight boards that support, realize carrying out quick centre gripping location to the bolt that awaits measuring of different specifications size.

Further setting the following steps: the mounting box is on a parallel with run through on the both sides wall of drive screw rod and set up along the groove that slides that drives screw rod axial extension, it is provided with the installation piece to slide in the groove, it installs the axis of rotation to rotate on the installation piece, the axis of rotation passes the installation piece with the coaxial fixed connection of tip of two-way screw lead screw.

Through adopting above-mentioned technical scheme, the installation piece can be installed on the installation piece with the help of rotating with the help of the two-way screw lead screw of the groove slidable mounting that slides on the mounting box lateral wall in the time, can follow the mounting panel and move in the axial that drives the screw rod when realizing rotating the installation, and then when the pulling bolt that awaits measuring, mounting panel and two-way screw lead screw can move, make the detection go on smoothly.

Further setting the following steps: the bidirectional threaded screw rod is a self-locking bidirectional threaded screw rod with a trapezoidal thread groove cross section.

Through adopting above-mentioned technical scheme, realize with the help of the two-way screw lead screw of auto-lock type two sets of tight boards of supporting and can't remove when two-way screw lead screw does not rotate, and then avoid two sets of tight boards of supporting and shift to lead to measuring the failure when measuring, improve and measure the precision.

Further setting the following steps: the two groups of clamping plates are perpendicular to each other and are arranged in the same vertical plane of the driving screw rod at intervals along the vertical direction, the clamping plate located below is fixedly arranged in the mounting box, and the clamping plate located above is arranged in a lifting mode along the vertical direction and is connected with a pressing piece used for tightly abutting against the two groups of clamping plates.

Through adopting above-mentioned technical scheme, the grip block that the realization utilized the top to go up and down to set up carries out the centre gripping to the bolt that awaits measuring of different specifications, convenient and fast, simple and practical.

Further setting the following steps: the mounting box is on a parallel with the both sides wall inner wall that drives the screw rod is kept away from the lift groove has been seted up to the one end of axial dynamometer, the lift groove extends and is in along vertical direction the top surface of mounting box both sides wall is uncovered setting, goes up and down to set up grip block both sides an organic whole is provided with to slide and stretches into the slider in the lift inslot.

Through adopting above-mentioned technical scheme, utilize the lift groove and the slider of grip block both sides to realize the lift activity setting of this lifter plate to the realization changes the distance between two sets of grip blocks to the bolt that awaits measuring of different specification sizes.

Further setting the following steps: the cross-section of the lifting groove is arc-shaped with a circular angle larger than 180 degrees, the inner wall of the lifting groove is provided with a thread structure, and the pressing piece is used for being connected with the clamping plate in a downward threaded manner in an opening mode at the top of the lifting groove in an inserted mode and abutted against the clamping plate.

Through adopting above-mentioned technical scheme, in the screw thread screw in lift inslot from the top with the help of supporting tight bolt, realize supporting tightly from the top to the grip block that goes up and down to set up, and then realize that two sets of lifter plates carry out spacing in vertical side to the bolt that awaits measuring.

Further setting the following steps: the mounting panel both sides and bottom surface all install with the rolling member of mounting box inner wall contact.

Through adopting above-mentioned technical scheme, reduce the mounting panel when sliding and the installation box inner wall between produced friction, make the axial force measure more advance accurately.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) the two groups of abutting plates and the two groups of clamping plates are movably arranged for positioning, so that the distance can be changed as required to adapt to bolts to be detected with different specifications and sizes for detection;

(2) the adjusting mode is simple and quick, the manufacturing cost is low, and the detection cost is effectively reduced.

Drawings

FIG. 1 is a background art drawing;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the mounting plate construction of the present invention;

fig. 4 is an enlarged schematic view of a portion a of fig. 2.

Reference numerals: 1. mounting a box; 2. positioning blocks; 3. driving the screw; 4. an axial force measuring cylinder; 5. an axial dynamometer; 6. positioning a groove; 8. a guide hole; 9. pushing the nut; 10. positioning a plate; 11. a nut groove; 12. mounting a plate; 13. a ball transfer unit; 14. a propping plate; 15. a chute; 16. a slider; 17. a bidirectional threaded screw rod; 18. a sliding groove; 19. mounting blocks; 20. a rotating shaft; 21. a rotating wheel; 22. a butt joint plate; 23. a clamping plate; 24. a lifting groove; 25. a slider; 26. the bolt is pressed tightly.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 2 and 3, the bolt detection device disclosed by the invention comprises a rectangular installation box 1 with an open top surface, a driving screw rod 3 slidably inserted into the installation box 1, an axial force measuring cylinder 4 with a thread sleeve arranged outside the installation box 1 and used for driving the screw rod 3, and an axial force measuring meter 5 fixedly arranged between the axial force measuring cylinder 4 and the outer wall of the installation box 1. Wherein, the axial direction that drives screw rod 3 is horizontal and the axial is unanimous with mounting box 1 length direction. The mounting plate 12 is arranged in the mounting box 1 along the axial sliding direction of the driving screw rod 3, the mounting plate 12 is arranged in an L shape with a horizontal part plate body and a vertical part plate body, the vertical part plate body is close to the axial dynamometer 5 and is perpendicular to the axial direction of the driving screw rod 3, the horizontal part plate body is located at the bottom end of the vertical part plate body, and meanwhile, the vertical part plate body is fixedly connected with the driving screw rod 3. When the horizontal plate body of the mounting plate 12 is placed in the mounting box 1 in a sliding manner, rolling parts which are in rolling contact with the inner wall of the mounting box 1 are arranged on two sides and the bottom surface of the mounting plate in a rolling manner, and universal balls 13 are selected as the rolling parts, so that the sliding friction force of the mounting plate 12 on the mounting box 1 is reduced.

Referring to fig. 2 and 3, two sets of vertical abutting plates 14 are arranged on the mounting plate 12 at intervals in parallel, and both the two sets of abutting plates 14 are parallel to the axial direction of the driving screw 3. The abutting plate 14 is arranged on the mounting plate 12 in a sliding mode, the sliding direction of the abutting plate is perpendicular to the axial direction of the driving screw rod 3, and a driving piece for adjusting the position of the abutting plate 14 is arranged between the abutting plate 14 and the mounting plate 12. When the tightening plate 14 is perpendicular to the horizontal plate body of the mounting plate 12, the mounting plate 12 is provided with a sliding groove 15 for slidably mounting the tightening plate 14, the extending direction of the sliding groove 15 is perpendicular to the axial direction of the driving screw rod 3, the bottoms of the two tightening plates 14 are provided with sliding blocks 16 which slidably extend into the sliding groove 15, and the driving piece drives the two sliding blocks 16 to synchronously move in the sliding groove 15 in the opposite direction or in the opposite direction. The driving piece is a bidirectional threaded screw rod 17 which is rotatably installed in the installation box 1, the bidirectional threaded screw rod 17 vertically penetrates through the two groups of abutting plates 14, and the two groups of abutting plates 14 are respectively in threaded fit with two sections of threaded structures of the two groups of bidirectional threaded screw rods 17. Under the restriction of the sliding groove 15, when the bidirectional threaded screw rod 17 rotates, the two groups of abutting plates 14 are driven to synchronously move, and the adjustment of the distance between the two groups of abutting plates 14 is realized. It is worth to be noted that the bidirectional threaded screw rod 17 is a self-locking type bidirectional threaded screw rod 17 with a trapezoidal thread groove cross section.

Referring to fig. 2, the mounting box 1 runs through on the both sides wall that is on a parallel with drive screw rod 3 and sets up along the groove 18 that slides that drives screw rod 3 axial extension, slides in the groove 18 that slides and is provided with installation piece 19 along the groove 18 extending direction that slides, rotates on the installation piece 19 and installs axis of rotation 20, and axis of rotation 20 passes the coaxial fixed connection of tip of installation piece 19 and two-way screw lead screw 17, can follow mounting panel 12 synchronous slip when realizing two-way screw lead screw 17 and rotate the installation. In order to facilitate the rotation of the rotating shaft 20 and simultaneously realize the rotation of the two-way threaded screw rod 17, a rotating wheel 21 is arranged at one end of the rotating shaft 20 far away from the mounting box 1.

Referring to fig. 3, one end of the abutting plate 14, which is far away from the axial dynamometer 5, is integrally provided with an abutting plate 22 close to the other abutting plate 14, the abutting plate 22 is perpendicular to the abutting plate 22, and an interval for placing the bolt to be tested is left between the two abutting plates 22, and it is worth explaining that the interval between the two abutting plates 22 is controlled to be always smaller than the maximum diameter of the head of the bolt to be tested and larger than the diameter of the rod body of the bolt to be tested, so that when the bolt to be tested is placed between the two abutting plates 14, the head of the bolt to be tested can be abutted by the two abutting plates 14 for limitation, and the two abutting plates 22 can abut against the head of the bolt to be tested in the axial direction of the driving screw 3.

Referring to fig. 2 and 3, meanwhile, a clamping assembly for controlling the axial direction of the bolt to be tested to be parallel to the driving screw rod 3 is arranged at one end of the mounting box 1 far away from the axial dynamometer 5, and the clamping assembly comprises two groups of clamping plates 23 arranged at intervals and an adjusting piece for controlling the distance between the two groups of clamping plates 23. Two sets of grip blocks 23 are in the same vertical face that drives screw rod 3 perpendicularly and set up along vertical direction interval, and the grip block 23 that is located the below is fixed to be set up and is kept away from the circumference that axial dynamometer 5's one end and perpendicular to driven screw rod 3 at mounting box 1, and the grip block 23 that is located the top then is the lift setting along vertical direction and is connected with the lower pressure member that is used for supporting two sets of grip blocks 23 tightly.

Referring to fig. 2 and 4, the mounting box 1 has been on a parallel with the one end that drives the wall inner wall of the both sides of screw rod 3 and keeps away from axial dynamometer 5 and has been seted up lift groove 24, and lift groove 24 extends and is uncovered setting along vertical direction at the top surface of mounting box 1 both sides wall, and the grip block 23 both sides an organic whole that the lift set up is provided with the slider 25 that slides and stretch into in the lift groove 24. Wherein, the lifting groove 24 cross-section is the arc setting that the circular angle is greater than 180 degrees, and lifting groove 24 inner wall is provided with the helicitic texture, and the pushing down piece is then for following the open lower screw thread grafting of lifting groove 24 top and the tight bolt 26 of support of the grip block 23 top surface of butt lift setting.

The implementation principle and the beneficial effects of the embodiment are as follows: the two groups of abutting plates 14 are slidably mounted on the mounting plate 12, the sliding direction is perpendicular to the axial direction of the driving screw 3, so that the heads of the bolts to be tested can be clamped and abutted from two sides when needed, and further, the limit is realized in the horizontal direction perpendicular to the axial direction of the driving screw 3, the abutting plate 22 arranged at one end, away from the axial dynamometer 5, of the abutting plates 14 can abut one surface, away from the axial dynamometer 5, of the heads of the bolts to be tested when the bolts to be tested are placed between the two abutting plates 14, meanwhile, the clamping assembly can control the bolts to be tested to be axially parallel to the driving screw 3, and finally, the bolts to be tested can drive the mounting plate 12, drive the screw 3 and the axial dynamometer 4 to move when moving away from the axial dynamometer 5, so that the axial dynamometer 4 abuts against the axial dynamometer 5 to; meanwhile, the abutting plate 14 is driven by the two-way threaded screw rod 17, and the clamping plate 23 in the clamping assembly can be subjected to distance adjustment under the action of the abutting bolt 26, so that bolts of different sizes and specifications can be clamped and placed on the detection device, convenience and rapidness are realized, the detection efficiency is improved, and meanwhile, the detection cost is reduced.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a bolt detection device, wears to establish drive screw rod (3), the threaded sleeve that go into in mounting box (1) including mounting box (1), slide and establishes axial dynamometry section of thick bamboo (4), the fixed axial dynamometer (5) that set up between axial dynamometry section of thick bamboo (4) and mounting box (1) outer wall on driving screw rod (3) outside mounting box (1), its characterized in that: the mounting box is characterized in that a mounting plate (12) is arranged in the mounting box (1) in an axial sliding mode along a driving screw rod (3), one end of the mounting plate (12) is fixedly connected with the driving screw rod (3), two groups of abutting plates (14) are arranged on the mounting plate (12) in parallel at intervals, the two groups of abutting plates (14) are both parallel to the axial direction of the driving screw rod (3), the abutting plates (14) are arranged on the mounting plate (12) in a sliding mode, the sliding direction of the abutting plates is perpendicular to the axial direction of the driving screw rod (3), a driving piece for adjusting the positions of the abutting plates (14) is arranged between the abutting plates (14) and the mounting plate (12), one end, far away from the axial dynamometer (5), of each abutting plate (14) is vertically provided with an abutting plate (22) close to the other abutting plate (14), and an interval for placing bolts to be tested is reserved between the; keep away from mounting box (1) the one end of axial dynamometer (5) is provided with the axial direction that the control awaits measuring bolt is on a parallel with drive the centre gripping subassembly of screw rod (3), the centre gripping subassembly includes grip block (23) that two sets of intervals set up and is used for controlling the regulating part of interval between two sets of grip block (23).

2. A bolt detection apparatus according to claim 1, wherein: the projections of the surfaces of the two groups of abutting plates (14) and the two groups of clamping plates (23) on the axial section of the driving screw (3) are enclosed to form a rectangle.

3. A bolt detection apparatus according to claim 2, wherein: the supporting plate (14) is perpendicular to the mounting plate (12), a sliding groove (15) used for slidably mounting the supporting plate (14) is formed in the mounting plate (12), the extending direction of the sliding groove (15) is perpendicular to the axial direction of the driving screw (3), sliding blocks (16) which slidably extend into the sliding groove (15) are arranged at the bottom of the supporting plate (14), and the driving piece drives the two sets of sliding blocks (16) to synchronously move in the sliding groove (15) in the opposite direction or in the opposite direction.

4. A bolt detection apparatus according to claim 3, wherein: the driving piece is a bidirectional threaded screw rod (17) rotatably installed in the installation box (1), the bidirectional threaded screw rod (17) vertically penetrates through the two groups of abutting plates (14), and the two groups of abutting plates (14) are respectively in threaded fit with two sections of thread structures of the two groups of bidirectional threaded screw rods (17).

5. A bolt detection device according to claim 4, wherein: mounting box (1) is on a parallel with run through on the both sides wall of drive screw rod (3) and offer along drive screw rod (3) axial extension's groove (18) that slides, it is provided with installation piece (19) to slide in groove (18) to slide, it installs axis of rotation (20) to rotate on installation piece (19), axis of rotation (20) pass installation piece (19) with the coaxial fixed connection of tip of two-way screw lead screw (17).

6. A bolt detection device according to claim 5, wherein: the bidirectional threaded screw rod (17) is a self-locking bidirectional threaded screw rod (17) with a trapezoidal thread groove cross section.

7. A bolt detection apparatus according to claim 3, wherein: two sets of grip block (23) are in the perpendicular drive screw rod (3) same vertical face and set up along vertical direction interval, and grip block (23) that are located the below are fixed to be set up in mounting box (1), and grip block (23) that are located the top then are along the lift setting of vertical direction and are connected with the lower pressure member that is used for supporting two sets of grip blocks (23).

8. A bolt detection device according to claim 7, wherein: mounting box (1) is on a parallel with the both sides wall inner wall that drives screw rod (3) is kept away from lift groove (24) have been seted up to the one end of axial dynamometer (5), lift groove (24) extend and along vertical direction the top surface of mounting box (1) both sides wall is uncovered setting, goes up and down to set up grip block (23) both sides an organic whole is provided with the slip and stretches into slider (25) in lift groove (24).

9. A bolt detection apparatus according to claim 8, wherein: the cross-section of the lifting groove (24) is in an arc shape with a circular angle larger than 180 degrees, the inner wall of the lifting groove (24) is provided with a thread structure, and the lower pressing piece is in threaded connection and abutted with the downward opening at the top of the lifting groove (24) and abuts against the fastening bolt (26) of the clamping plate (23).

10. A bolt detection apparatus according to claim 1, wherein: the rolling pieces in contact with the inner wall of the mounting box (1) are mounted on the two sides and the bottom surface of the mounting plate (12).