CN210375056U

CN210375056U - Inner stud positioning and detecting device

Info

Publication number: CN210375056U
Application number: CN201921760369.7U
Authority: CN
Inventors: 程瑶; 何春晖
Original assignee: Chongqing Anmu Technology Co ltd
Current assignee: Chongqing Anmu Technology Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-04-21
Anticipated expiration: 2029-10-18

Abstract

An internal stud positioning detection device comprises a rack, wherein the rack is provided with a workbench, and the workbench is provided with a clamp for fixing a part to be detected and a detection unit for positioning and detecting an internal stud on the part to be detected; the detection unit comprises a guide rail, a moving seat, a servo motor and a positioning and measuring device; the positioning measuring device comprises a lifting mechanism and a positioning measuring head arranged on the lifting mechanism; and the positioning measuring head is provided with a steel ball which can be clamped on the port of the inner stud and a displacement sensor for measuring the moving distance of the steel ball. Interior double-screw bolt location detection device can be through servo motor and lead screw structure, and drive location measuring device removes accurate position, with the steel column card including on the port of double-screw bolt, through the offset of displacement sensor measurement steel column to the accurate positional information of double-screw bolt in the accurate obtaining, location measurement is accurate and efficient, equipment structure is simple, low cost.

Description

Inner stud positioning and detecting device

Technical Field

The utility model belongs to machine parts check out test set field especially relates to an interior spiral shell post location detection device.

Background

With the development of the electric new energy vehicle industry, the battery pack stored as the vehicle energy is more important, and the quality of the battery pack is directly related to the quality of the vehicle. The battery pack comprises a shell and a motor group arranged in the shell, and the shell is used for protecting the battery group and preventing water and moisture. The shell is divided into a main body part and a panel, a cavity for accommodating the battery pack is arranged on the main body part, and the panel is arranged on a port arranged on one side of the main body part and used for sealing the battery pack in the shell.

In order to realize the connection between the panel and the main body part, a plurality of studs are welded in a cavity of the main body part, and internal threads are arranged on the studs for connecting bolts, so that the panel and the main body part can be fixedly connected through the bolts.

When the position and the flatness of the stud do not meet the requirements, after the main body part is connected with the panel, the installation position of the panel can be relatively deviated, or one side of the panel is tilted, so that a gap is generated between the port of the main body part and the edge of the panel, and the waterproof performance of the shell is affected, so that the position and the flatness of the stud need to be detected.

The stud detection mainly comprises methods such as manual detection, 3D visual detection and three-coordinate detection, and currently, the manual detection is mainly adopted, and 3D visual detection is adopted by few enterprise units. The manual detection has extremely low accuracy and efficiency due to different measurement habits of each person; although the 3D visual detection efficiency is high, the equipment price is difficult to accept by general manufacturers, and the detected product is unstable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses there is the accuracy and the lower, higher problem of cost of efficiency to above-mentioned current detection mode, provide an interior screw post location detection device of measuring accuracy, efficient, with low costs.

In order to achieve the above object, the utility model discloses a technical scheme be:

an internal stud positioning detection device comprises a rack, wherein the rack is provided with a workbench, and the workbench is provided with a clamp for fixing a part to be detected and a detection unit for positioning and detecting an internal stud on the part to be detected;

the detection unit comprises a guide rail, a moving seat, a servo motor and a positioning and measuring device;

the guide rails comprise a first guide rail arranged transversely and a second guide rail arranged longitudinally;

the moving seat comprises a first moving seat which is slidably arranged on the first guide rail and a second moving seat which is slidably arranged on the second guide rail;

the servo motor comprises a first servo motor and a second servo motor, the first servo motor drives the first moving seat to move through the screw rod mechanism, and the second servo motor drives the second moving seat to slide through the screw rod mechanism;

the positioning measuring device is arranged on the second moving seat and comprises a lifting mechanism and a positioning measuring head arranged on the lifting mechanism;

the lifting mechanism comprises a base, a support and a measuring motor, wherein the support is arranged on the base and is driven by the measuring motor to lift;

a positioning measuring head is arranged on the bracket, and a steel ball which can be clamped on the port of the inner stud and a displacement sensor for measuring the moving distance of the steel ball are arranged on the positioning measuring head;

the steel ball is arranged in a mounting groove formed in the positioning measuring head, the displacement sensor comprises a first displacement sensor and a second displacement sensor, the first displacement sensor and the second displacement sensor are transversely arranged, and probe rods arranged on the first displacement sensor and the second displacement sensor are both propped against the steel ball.

Preferably, the workbench is divided into a fixed platform and a floating platform, the floating platform is positioned below the fixed platform, and the fixed platform and the floating platform are connected through a floating tension spring;

the detection unit is positioned on the floating platform, and the fixed platform is provided with a working opening for enabling the detection unit to extend out of the fixed platform upwards;

the clamp sets up a plurality ofly, sets up around the working opening a week.

Preferably, the fixing platform is provided with two positioning pins which are used for being inserted into positioning holes formed in the component to be detected, and the two positioning pins are arranged diagonally.

Preferably, the floating platform is provided with two limiting columns which are used for propping against the surface of the part to be measured, and the number of the limiting columns is two.

Preferably, an expansion pin is mounted on the floating platform, and comprises an expansion pin seat fixed on the floating platform, an expansion sleeve which is mounted on the expansion pin seat and can expand and retract, and a driving cylinder for driving the expansion sleeve to expand and retract;

the expansion pin is provided with two opposite angles, and the expansion sleeve is positioned at the top end of the expansion pin seat and is used for being inserted into a positioning hole formed in the component to be tested.

Preferably, the detection unit further comprises a flatness measuring device, the flatness measuring device comprises a lifting mechanism and a double-shaft tilt sensor mounted on the lifting mechanism, and the double-shaft tilt sensor is mounted on a support of the lifting mechanism.

Preferably, a guide rod arranged on the bracket is slidably mounted in a mounting hole arranged on the base, and the guide rod is vertically arranged;

and a pressure spring is arranged between the support and the base, and the measuring motor is connected with the support through a pull wire and used for pulling the support to descend.

Preferably, the distance between the bracket and the base is smaller than or equal to the natural length of the compressed spring when the compressed spring is not deformed.

Preferably, the stay wire penetrates through a mounting hole formed in the underframe, and the mounting hole is vertically formed.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. interior double-screw bolt location detection device can be through servo motor and lead screw structure, and drive location measuring device removes accurate position, with the steel column card including on the port of double-screw bolt, through the offset of displacement sensor measurement steel column to the accurate positional information of double-screw bolt in the accurate obtaining, location measurement is accurate and efficient, equipment structure is simple, low cost.

2. The workbench is provided with a floating platform, the floating platform can float relative to the fixed platform through a floating tension spring, the measuring unit is installed on the floating platform and can float along with the floating platform, and the measuring unit is kept parallel to a part to be measured, so that the accuracy of position detection of the inner screw column is ensured.

3. The locating pin of installation on the fixed station can fix a position the part that awaits measuring, and what make the clamp can be accurate carries out the centre gripping to the part that awaits measuring fixed for the part that awaits measuring operation speed under installation and unloading improves work efficiency.

4. The floating platform is provided with the limiting column and can be propped against the surface of the part to be detected, so that the floating posture of the floating platform is controlled, the floating platform is adjusted to be parallel to the part to be detected, and the accuracy of the position detection of the inner screw column is ensured. After the floating platform is floated and positioned, the installed expansion pin can be expanded, and the floating platform is fixedly connected with a part to be measured, so that the stability of the relative positions of the floating platform and the part to be measured is ensured, and the measurement accuracy is ensured.

5. On the floating platform that the flatness measuring device was installed, through measuring the inclination of floating platform for the horizontal plane to realize the measurement of the part flatness that awaits measuring, improve equipment functionality.

6. The support of the lifting mechanism is lifted by the pushing of the pressure spring, and the pull wire is pulled to descend, so that the lifting mechanism is simple in structure, easy to assemble, low in cost and convenient to maintain. The vertical setting of mounting hole that the acting as go-between is located makes the traction force of acting as go-between can the at utmost act on the support, guarantees that the support falls rapidly, improve equipment overall operation efficiency.

Drawings

FIG. 1 is a schematic structural view of an inner screw positioning and detecting device;

FIG. 2 is a schematic structural diagram of the floating platform after the measurement unit is installed;

FIG. 3 is a schematic structural view of the second movable base after the positioning and measuring device and the surface degree measuring device are installed thereon;

in the above figures: 1. a frame; 2. a work table; 21. a fixed platform; 22. a floating platform; 23. a floating tension spring; 24. a working port; 25. positioning pins; 26. a limiting column; 27. a tensioning pin; 27a, an expansion pin seat; 27b, expanding the sleeve; 3. clamping; 4. a guide rail; 41. a first guide rail; 42. a second guide rail; 5. a movable seat; 51. a first movable base; 52. a second movable base; 6. a servo motor; 61. a first servo motor; 62. a second servo motor; 7. positioning a measuring device; 71. positioning a measuring head; 72. a steel ball; 73. a displacement sensor; 73a, a first displacement sensor; 73b, a second displacement sensor; 74. mounting grooves; 8. a lifting mechanism; 81. a base; 82. a support; 83. measuring the motor; 84. a guide bar; 85. an assembly hole; 86. a pressure spring; 87. a pull wire; 88. and (7) installing holes.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 3, the utility model provides an interior screw post location detection device for detect the main part of the battery package casing body as the part that awaits measuring, measure the position of interior screw post on the main part, thereby ensure that the panel of battery package casing body can be accurate link to each other with the main part, guarantee the waterproof performance of battery package casing body after connecting between the two.

The inner stud is a rod piece with internal threads and is used for connecting the bolt through threads.

The inner stud positioning and detecting device comprises a rack 1, wherein the rack 1 is provided with a workbench 2, and a clamp 3 and a detecting unit are arranged on the workbench 2.

The clamp 3 is used for holding the component to be measured, thereby fixing the component to be measured on the table 2.

The detection unit is used for positioning and detecting the position of the inner stud on the component to be detected.

The detection unit comprises a guide rail 4, a moving seat 5, a servo motor 6 and a positioning and measuring device 7.

The guide rail 4 includes a first guide rail 41 disposed laterally and a second guide rail 42 disposed longitudinally.

The mobile seat 5 comprises a first mobile seat 51 slidingly mounted on the first guide rail 41 and a second mobile seat 52 slidingly mounted on the second guide rail 42.

The servo motor 6 includes a first servo motor 61 and a second servo motor 62.

The first guide rail 41 and the first servo motor 61 are fixed to the table 2, and the second guide rail 42 and the second servo motor 62 are fixed to the first movable base 51.

The first servo motor 61 drives the first moving base 51 to move through the first lead screw mechanism, a screw of the first lead screw mechanism is mounted on a shaft seat on the workbench 2, can rotate and is driven by the first servo motor 61, and a nut of the first lead screw mechanism is fixed on the first moving base 51.

The second servo motor 62 drives the second moving base 52 to slide through a second lead screw structure, a screw of the second lead screw mechanism is mounted on a shaft seat on the first moving base 51, can rotate and is driven by the second servo motor 62, and a nut of the second lead screw mechanism is fixed on the second moving base 52.

The positioning and measuring device 7 is mounted on the second movable base 52 and includes a lifting mechanism 8 and a positioning probe 71 mounted on the lifting mechanism 8.

The lifting mechanism 8 includes a base 81, a bracket 82, and a measuring motor 83.

The base 81 is fixed to the second movable base 52, and the bracket 82 is slidably mounted on the base 81 so as to be movable up and down. A measurement motor 83 powers the raising and lowering of the carriage 82.

The positioning probe 71 is mounted on the carriage 82 so as to be raised and lowered therewith.

The positioning probe 71 is provided with a steel ball 72 which can be clamped on the port of the inner stud and a displacement sensor 73 for measuring the moving distance of the steel ball 72.

The steel ball 72 is mounted in a mounting groove 74 provided in the positioning measuring head 71, the displacement sensor 73 comprises a first displacement sensor 73a arranged in the transverse direction and a second displacement sensor 73b arranged in the longitudinal direction, and probe rods provided for the first displacement sensor 73a and the second displacement sensor 73b extend into the mounting groove 74 and are abutted against the steel ball 72.

When the steel ball 72 is not in contact with the port of the inner stud, the probe rods of the two displacement sensors push the steel ball 72 to one corner of the mounting groove 74.

When the positioning detection is carried out, the parts to be detected are clamped and fixed on the workbench 1 by the plurality of clamps 3. The second movable base 52 is moved to the set position by controlling the operation of the two servo motors.

After the second movable seat 52 is located at the set position, the bracket 82 of the positioning and measuring device 7 is lifted, so that the positioning measuring head 71 is lifted, the top of the steel ball 72 in the positioning measuring head 71 enters the inner stud of the part to be measured, and finally the steel ball 72 is clamped on the port of the inner stud of the part to be measured and is coaxial with the axis of the inner stud because the outer diameter of the steel ball 72 is larger than the inner diameter of the inner stud.

If the inner stud of the part to be measured is in the accurate position, the steel ball 72 is positioned on the axis of the inner stud when the steel ball 72 is not in contact with the inner stud; as the steel ball 72 lifted by the positioning probe 71 contacts and snaps onto the port of the inner stud, still on the axis of the inner stud, the steel ball 72 is not displaced in a horizontal plane in the mounting slot 74. Since the steel ball 72 does not produce displacement in the horizontal plane, the feeler levers of the two displacement sensors do not move.

If the inner stud of the part to be tested is not in the accurate position, the steel ball 72 is not positioned on the axis of the inner stud when the steel ball 72 is not in contact with the inner stud; when the steel ball 72 lifted by the positioning measuring head 71 contacts the port of the inner stud, the port of the inner stud pushes the steel ball 72 due to the axis of the inner stud in the steel ball 72, the steel ball 72 moves on the horizontal plane, and finally the steel ball 72 is clamped on the port of the inner stud and moves to the axis of the inner stud. Due to the displacement of the steel ball 72 in the horizontal plane, the probe rod of at least one displacement sensor is moved.

And the two displacement sensors upload displacement measurement data to the control terminal equipment in real time and display the displacement measurement data by a display on the control terminal equipment.

When the steel ball 72 is contacted with and clamped on the port of the inner stud, the displacement measurement data of the two displacement sensors are both 0, and the position of the inner stud is proved to be accurate; if the displacement measurement data of the displacement sensor is not 0, the position of the inner stud is proved to be inaccurate, and the value of the displacement measurement data can indicate the offset of the position of the inner stud in the transverse direction and the longitudinal direction, so that the current accurate position of the inner stud is obtained.

After the positioning detection is completed, the bracket 82 of the positioning and measuring device 7 falls down, the clamp 3 is released, and the component to be measured is moved down from the workbench 1.

The inner wall of the part to be measured where the inner screw rod is located serves as a measuring surface, and the part to be measured is easy to deform due to the fact that the part to be measured is easy to deform under the clamping force of the clamp 3, and the part to be measured is inclined relative to the horizontal plane.

In order to keep the measuring unit parallel to the measuring plane of the part to be measured and thus to ensure the accuracy of the positioning detection, the table 2 is divided into a fixed platform 21 and a floating platform 22.

The floating platform 22 is positioned below the fixed platform 21, and the fixed platform 21 and the floating platform 22 are connected through a floating tension spring 23.

The fixed platform 21 is fixedly arranged on the frame 1 and is fixed. The floating platform 22 is suspended and fixed on the fixed platform 21 by a floating tension spring 23. The floating tension spring 23 expands and contracts, and the floating platform 22 floats up and down relative to the fixed platform 21.

The sensing unit is located on the floating platform 22 so as to float therewith.

The fixed platform 21 is provided with a working opening 24 for receiving the detection unit on the floating platform 22 and enabling the detection unit to extend upwardly relative to the fixed platform 21 to contact the inner stud in the part to be tested.

Clamp 3 is located fixed platform 21, sets up a plurality ofly along the work mouth 24 edge to around work mouth 24 a week, can carry out abundant centre gripping to the part edge that awaits measuring fixedly.

In order to make the floating platform 22 accurately float to a state parallel to the measuring surface of the component to be measured, the floating platform 22 is provided with two limiting columns 26, and the two limiting columns 26 are arranged diagonally.

After the part to be measured is fixed on the fixed platform 21 through the clamping of the clamp 3, the part to be measured contacts the limiting column 26, and presses down the floating platform 22 through the limiting column 26, so that the floating tension spring 23 is elongated, an elastic force is generated to act on the limiting column 26 on the floating platform 22, and the limiting column 26 is tightly propped against the measuring surface of the part to be measured.

The two limiting columns 26 arranged diagonally are tightly pressed against the measuring surface of the component to be measured, and the floating platform 22 is parallel to the measuring surface of the component to be measured.

In order to keep the measuring surface parallel to the floating platform 22 after the limit column 26 is tightly pressed against the measuring surface of the component to be measured, an expansion pin 27 is installed on the floating platform 22 and used for fixedly connecting the floating platform 22 with the component to be measured.

The expansion pin 27 includes an expansion pin boss 27a fixed to the floating platform 22, an expansion sleeve 27b mounted on the expansion pin boss 27a to be expandable and retractable, and a driving cylinder for driving the expansion sleeve 27b to be expandable and retractable.

The expansion pin 27 is a conventional connecting component, and the expansion sleeve 27b is located at the top end of the expansion pin seat 27a, and after being inserted into the positioning hole of the component to be tested, the expansion sleeve 27b expands under the driving of the driving cylinder, and the outer diameter of the expansion sleeve is increased, and the expansion sleeve is pressed on the inner wall of the positioning hole and fixed in the positioning hole through friction force, so that the fixed connection between the expansion pin 27 and the component to be tested is completed.

Two opposite angles of the expansion pins 27 are arranged, so that the stability of the part to be tested after the expansion pins are connected with the part to be tested can be maintained.

In order to fix all the members to be tested to the same set position, the fixing platform 21 is provided with two positioning pins 25, and the two positioning pins 25 are arranged diagonally.

The positioning pin 25 is inserted into the positioning hole of the component to be measured, and fixes the position of the component to be measured in the horizontal direction by insertion fit, and then the clamp 3 clamps and fixes the component to be measured.

The component to be detected is accurately fixed at the set position through the fibers of the positioning pin 25, so that the detection unit can perform accurate positioning detection on the inner screw column of the component to be detected.

In order to measure the flatness of the measuring surface of the part to be measured, where the inner screw is located, the detection unit further comprises a flatness measuring device 9.

The flatness measuring apparatus 9 includes a lifting mechanism 8 and a dual-axis tilt sensor 91, and the dual-axis tilt sensor 91 is mounted on the bracket 82 of the lifting mechanism 8 so as to be lifted therewith.

After rising up along with the bracket 82, the biaxial inclination angle sensor 91 is attached to the measurement surface of the component to be measured, and detects the inclination angle of the measurement surface relative to the horizontal plane, thereby detecting the deformation of the component to be measured.

In order to realize the lifting and lowering of the bracket 82 in the lifting mechanism 8, a guide rod 84 provided to the bracket 82 is slidably fitted into a fitting hole 85 provided to the base 81,

the guide bar 84 is vertically disposed so that the sliding direction of the bracket 82 is vertical, thereby being capable of being lifted and lowered.

A pressure spring 86 is arranged between the bracket 82 and the base 81, and the measuring motor 83 is connected with the bracket 82 through a pull wire 87.

When the bracket 82 needs to be lowered, the main shaft of the measuring motor 83 rotates in the forward direction, so that one end of the pull wire 87 is wound on the main shaft of the measuring motor 83, and the other end of the pull wire 87 pulls the bracket 82 downward, so that the bracket 82 is lowered.

When the bracket 82 is lowered, the distance between the bracket 82 and the base 81 is reduced, and the compression spring 86 located therein is compressed to generate an elastic force.

When the bracket 82 needs to be lifted, the main shaft of the measuring motor 83 rotates reversely, the pull wire 87 on the main shaft is released, the downward pulling on the bracket 82 is relieved, and the bracket 82 is upwards supported by the elasticity of the pressure spring 86, so that the bracket 82 is lifted.

The distance between the bracket 82 and the base 81 is less than or equal to the natural length of the compressed spring 86 when the compressed spring 86 is not deformed.

The stay wire 87 penetrates through a mounting hole 88 arranged on the base 81, and the mounting hole 88 is vertically arranged, so that the stay wire 87 can vertically pull the bracket 82, the acting force is direct, and the driving force is strong.

Claims

1. The internal stud positioning and detecting device is characterized by comprising a rack (1), wherein the rack (1) is provided with a workbench (2), the workbench (2) is provided with a clamp (3) for fixing a part to be detected and a detecting unit for positioning and detecting an internal stud on the part to be detected,

the detection unit comprises a guide rail (4), a moving seat (5), a servo motor (6) and a positioning and measuring device (7);

the guide rail (4) comprises a first guide rail (41) arranged transversely and a second guide rail (42) arranged longitudinally;

the moving seat (5) comprises a first moving seat (51) which is slidably mounted on the first guide rail (41) and a second moving seat (52) which is slidably mounted on the second guide rail (42);

the servo motor (6) comprises a first servo motor (61) and a second servo motor (62), the first servo motor (61) drives the first moving seat (51) to move through a screw rod mechanism, and the second servo motor (62) drives the second moving seat (52) to slide through a screw rod mechanism;

the first guide rail (41) is fixed on the workbench (2), and the second guide rail (42) is fixed on the first movable seat (51);

the positioning and measuring device (7) is arranged on the second moving seat (52) and comprises a lifting mechanism (8) and a positioning measuring head (71) arranged on the lifting mechanism (8);

the lifting mechanism (8) comprises a base (81), a bracket (82) and a measuring motor (83), wherein the bracket (82) is arranged on the base (81) and is driven by the measuring motor (83) to lift;

the positioning measuring head (71) is arranged on the bracket (82), and a steel ball (72) which can be clamped on the port of the inner stud and a displacement sensor (73) for measuring the moving distance of the steel ball (72) are arranged on the positioning measuring head (71);

the steel ball (72) is arranged in an installation groove (74) formed in the positioning measuring head (71), the displacement sensor (73) comprises a first displacement sensor (73a) arranged transversely and a second displacement sensor (73b) arranged longitudinally, and probe rods arranged on the first displacement sensor (73a) and the second displacement sensor (73b) are both propped against the steel ball (72).

2. The inner screw column positioning detection device according to claim 1, wherein the workbench (2) is divided into a fixed platform (21) and a floating platform (22), the floating platform (22) is located below the fixed platform (21) and is connected with the fixed platform through a floating tension spring (23);

the detection unit is positioned on the floating platform (22), and the fixed platform (21) is provided with a working opening (24) for enabling the detection unit to extend out of the fixed platform (21) upwards;

the clamp (3) is arranged in a plurality of numbers and arranged around the working opening (24).

3. The internal stud positioning and detecting device according to claim 2, wherein the fixing platform (21) is provided with two positioning pins (25) for being inserted into positioning holes of the component to be detected, and the two positioning pins (25) are arranged diagonally.

4. The internal stud positioning and detecting device according to claim 2, characterized in that the floating platform (22) is provided with two limiting studs (26) for abutting against the surface of the component to be detected, and the number of the limiting studs (26) is two.

5. The inner bolt positioning detection device according to claim 4, characterized in that an expansion pin (27) is mounted on the floating platform (22), and the expansion pin (27) comprises an expansion pin seat (27a) fixed on the floating platform (22), an expansion sleeve (27b) capable of expanding and retracting and mounted on the expansion pin seat (27a), and a driving cylinder for driving the expansion sleeve (27b) to expand and retract;

the two expansion pins (27) are arranged diagonally, and the expansion sleeve (27b) is positioned at the top end of the expansion pin seat (27a) and is used for being inserted into a positioning hole formed in the component to be tested.

6. The inner stud positioning detection device according to claim 1, characterized in that the detection unit further comprises a flatness measuring device (9), the flatness measuring device (9) comprising a lifting mechanism (8) and a dual-axis tilt sensor (91) mounted on the lifting mechanism (8), the dual-axis tilt sensor (91) being mounted on a bracket (82) of the lifting mechanism (8).

7. The internal stud positioning detection device according to claim 1 or 6, characterized in that a guide rod (84) provided with the bracket (82) is slidably mounted in a fitting hole (85) provided with the base (81), the guide rod (84) being vertically arranged;

a pressure spring (86) is installed between the support (82) and the base (81), and the measuring motor (83) is connected with the support (82) through a pull wire (87) and used for pulling the support (82) to descend.

8. The internal bolt positioning detection device according to claim 7, wherein the distance between the bracket (82) and the base (81) is less than or equal to the natural length of the compression spring (86) when the compression spring is not deformed.

9. The inner stud positioning detection device according to claim 7, wherein the stay (87) passes through a mounting hole (88) provided in the base (81), the mounting hole (88) being vertically provided.