Positioning detection device

Abstract

The invention provides a positioning detection device, which relates to the technical field of production line fixed-point processing operation and comprises a bolt body, a pin hole, an abutting piece, a transmission mechanism, a displacement piece and a displacement sensor. The pin hole is formed in the ground, the plug pin body is configured to advance along with the sliding pair, the plug pin body is matched with the pin hole in an inserted mode so that the sliding pair can stop at a fixed point, a containing cavity is coaxially formed in the plug pin body, the abutting piece, the transmission mechanism, the displacement piece and the displacement sensor are all movably installed in the containing cavity, and the abutting piece is configured to stretch out and draw back in the radial direction of the plug pin body; when the bolt body is matched with the pin hole in an inserted mode, the abutting part extends out of the containing cavity and abuts against the inner side wall of the pin hole, the transmission mechanism is connected between the abutting part and the displacement part and used for converting radial displacement of the abutting part into axial displacement of the displacement part, and the displacement sensor is used for measuring the displacement amount of the displacement part. The device has the effect of detecting the lateral displacement deviation of the sliding pair so as to improve the positioning precision of a production line.

Description

Technical Field

[0001] The present invention relates to the technical field of production line fixed-point processing operations, and in particular to a positioning detection device. Background Art

[0002] In the assembly line production and processing workshop, the moving pair needs to move along a predetermined route to transport the workpiece to each processing station in sequence. When arriving at the station, the moving pair stops moving; after the processing is completed, the moving pair continues to move downstream. Whether the stop position of the moving pair is accurate is related to the processing quality of the workpiece.

[0003] The existing production line positioning method uses a method of opening pin holes on both sides of the ground track and setting a latch at the corresponding position of the moving pair. The latch and the pin hole are plugged together to realize the positioning of the moving pair. In order to meet the requirements of flexible movement of the equipment, a gap needs to be left between the moving pair and the side wall of the pin hole. When the actuator of the processing operation has high requirements for the accuracy of the workpiece position, it is necessary to consider not only the positioning accuracy of the moving pair along the moving direction, but also the lateral displacement perpendicular to the moving path.

[0004] The existing lateral displacement detection device is installed on the ground or inside the pin hole, which not only interferes with the normal sliding of the moving pair, but also requires a lateral displacement detection device to be installed at the stop point of each workstation to obtain the lateral displacement deviation of the moving pair each time it stops. In addition, installing the detection device in the pin hole requires widening the gap between the moving pair and the pin hole, which makes it easy for the moving pair to produce a larger lateral displacement deviation, making it difficult to achieve precise matching between the machining operation actuator and the workpiece, and ultimately affecting the machining quality of the workpiece. Summary of the invention

[0005] The problem solved by the present invention is how to detect the lateral deviation of the moving pair to improve the positioning accuracy of the production line.

[0006] In order to solve the above problems, the present invention provides a positioning detection device.

[0007] In a first aspect, the present invention provides a positioning detection device, which adopts the following technical solution:

[0008] A positioning detection device includes a pin body, a pin hole, an abutment member, a transmission mechanism, a displacement member and a displacement sensor;

[0009] The pin hole is opened on the ground, the latch body is configured to move with the moving pair, the latch body is plugged and matched with the pin hole to make the moving pair stop at a fixed point, a receiving cavity is coaxially arranged inside the latch body, the abutment member, the transmission mechanism, the displacement member and the displacement sensor are all movably installed in the receiving cavity, and the abutment member is configured to extend and retract along the radial direction of the latch body;

[0010] When the latch body is not plugged into the pin hole, the abutment is configured to extend outward from the accommodating cavity. When the latch body is plugged into the pin hole, the abutment is configured to retract toward the accommodating cavity under the abutment and limiting action of the inner side wall of the pin hole. The transmission mechanism is connected between the abutment and the displacement member. The transmission mechanism is used to convert the radial displacement of the abutment into the axial displacement of the displacement member along the latch body. The displacement sensor is used to measure the displacement of the displacement member.

[0011] The beneficial effects of the present invention are as follows: when the moving pair stops at the work station, the latch body is plugged into the pin hole on the ground for positioning, restricting the moving pair from continuing to move, and the abutment member is blocked by the inner wall of the pin hole to cause lateral displacement, and the displacement member is driven to slide upward through the transmission mechanism. Since the lateral displacement of the abutment member along the radial direction of the latch body and the displacement of the displacement member along the axial direction of the latch body can be calculated through geometric relationship, a displacement sensor is set inside the latch body to measure the displacement of the displacement member, and the lateral offset distance of the moving pair can be indirectly obtained. This device does not need to set up additional detection devices on the ground or in the pin hole. The latch body is both a positioning device and a detection device, which fully guarantees that the moving pair can move smoothly, and the offset can be measured synchronously during the process of the moving pair stopping and positioning.

[0012] By cooperating this device with a deviation correction device, under the control of an automatic control system, the measured offset can be fed back to the deviation correction device to drive the moving pair to return to compensate for the offset, so that the moving pair and the processing actuator are accurately aligned, thereby improving the positioning accuracy of the production line.

[0013] Optionally, the transmission mechanism includes a rocker rod and a connecting rod, one end of the rocker rod is hinged to the inner wall of the accommodating cavity, the other end of the rocker rod is hinged to the abutment member, and both ends of the connecting rod are respectively hinged to the rocker rod and the displacement member.

[0014] Optionally, the abutment member is a rigid wheel, and the rigid wheel is rotatably connected to the end of the rocker arm.

[0015] Optionally, the displacement amount of the abutment member along the radial direction of the latch body is equal to the displacement amount of the displacement member along the axial direction of the latch body.

[0016] Optionally, the displacement member includes a connecting frame and a roller, wherein one end of the connecting frame along the axial direction of the latch body is hinged to the connecting rod, and the other end of the connecting frame abuts against the displacement sensor, and the roller is rotatably connected to the connecting frame and in rolling contact with the inner wall of the accommodating cavity.

[0017] Optionally, a first elastic member is provided between the connecting frame and the displacement sensor, and when the abutment member is out of contact with the side wall of the pin hole, the first elastic member is used to drive the abutment member to reset.

[0018] Optionally, the pin hole is a waist-shaped hole arranged perpendicular to the travel direction of the moving pair, and the pin hole and the pin body are clearance-matched in the travel direction of the moving pair.

[0019] Optionally, it also includes a guide cylinder and a locking mechanism, wherein the guide cylinder is coaxially sleeved on the outside of the latch body, the latch body is slidably connected to the guide cylinder, the latch body is connected to the movable pair through the guide cylinder, and the locking mechanism is arranged between the guide cylinder and the latch body. The locking mechanism is locked to limit the movement or rotation of the latch body relative to the guide cylinder, and the locking mechanism is unlocked to allow the latch body to move axially and extend out of the guide cylinder.

[0020] Optionally, the locking mechanism includes a limit groove, a giveway groove and a locking key, the limit groove and the giveway groove are opened on the side wall of the guide cylinder, and the two are located in different directions, the locking key is fixedly connected to the latch body, and the giveway groove extends along the axial direction of the latch body; when the locking mechanism is in a locked state, the locking key is plugged into the limit groove; when the locking mechanism is in an unlocked state, the locking key is slidably matched with the giveway groove to enable the latch body and the guide cylinder to slide relative to each other.

[0021] Optionally, a convex edge is provided on the outer peripheral wall of the latch body, the convex edge abuts against the inner wall of the guide cylinder, a second elastic member is provided between the latch body and the guide cylinder, the second elastic member abuts against the convex edge, and the second elastic member is used to make the end face of the latch body abut against the bottom wall of the pin hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of assembling the positioning detection device and the moving pair according to an embodiment of the present invention.

[0023] Figure 2 It is an axial cross-sectional view of the positioning detection device according to an embodiment of the present invention.

[0024] Figure 3 for Figure 2 A partial enlarged view of area A in the middle.

[0025] Figure 4 It is a schematic cross-sectional assembly diagram of the latch body and the pin hole according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the overall structure of the positioning detection device according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 10. Ground; 101. Pin hole; 20. Moving pair; 1. Pin body; 11. Accommodating cavity; 12. Raised edge; 2. Abutment member; 21. Rigid wheel; 3. Transmission mechanism; 31. Rocker; 32. Connecting rod; 4. Displacement member; 41. Connecting frame; 42. Roller; 5. Displacement sensor; 6. First elastic member; 7. Guide cylinder; 8. Locking mechanism; 81. Limiting groove; 82. Giving groove; 83. Locking key; 9. Second elastic member. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0030] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the left and right position, and the positive direction of the X axis represents the right side, and the reverse direction of the X axis represents the left side; the Y axis in the drawings represents the front and back position, and the positive direction of the Y axis represents the front side, and the reverse direction of the Y axis represents the back side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as a limitation on the present invention.

[0031] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] The invention provides a positioning detection device.

[0034] Reference Figure 1 , Figure 2 A positioning detection device provided by an embodiment of the present invention comprises a latch body 1, a pin hole 101, an abutment member 2, a transmission mechanism 3, a displacement member 4 and a displacement sensor 5; the pin hole 101 is opened on the ground 10, the latch body 1 is configured to move along with the moving pair 20, the latch body 1 is plugged and matched with the pin hole 101 to enable the moving pair 20 to stop at a fixed point, a receiving cavity 11 is coaxially provided inside the latch body 1, the abutment member 2, the transmission mechanism 3, the displacement member 4 and the displacement sensor 5 are all movably installed in the receiving cavity 11, the abutment member 2 is configured to extend radially along the latch body 1 retract; when the latch body 1 is not plugged into the pin hole 101, the abutment 2 is configured to extend outward from the accommodating cavity 11, and when the latch body 1 is plugged into the pin hole 101, the abutment 2 is configured to retract toward the accommodating cavity 11 under the abutment and limiting action of the inner side wall of the pin hole 101, and the transmission mechanism 3 is connected between the abutment 2 and the displacement member 4, and the transmission mechanism 3 is used to convert the radial displacement of the abutment 2 into the axial displacement of the displacement member 4 along the latch body 1, and the displacement sensor 5 is used to measure the displacement of the displacement member 4.

[0035] Specifically, when the moving pair 20 stops at the work station, the latch body 1 is plugged and matched with the pin hole 101 on the ground 10 for positioning, limiting the moving pair 20 from continuing to move. The abutment member 2 protruding from the outer peripheral wall of the latch body 1 retracts into the accommodating cavity 11 after being abutted and limited by the inner side wall of the pin hole 101, and drives the displacement member 4 to slide upward through the transmission mechanism 3. Since the lateral displacement of the abutment member 2 along the radial direction of the latch body 1 and the displacement of the displacement member 4 along the axial direction of the latch body 1 can be calculated through geometric relationship, a displacement sensor 5 is set inside the latch body 1 to measure the displacement of the displacement member 4, and then the lateral offset distance of the moving pair 20 can be indirectly obtained.

[0036] The device does not need to set up additional detection devices on the ground 10 or in the pin hole 101. The pin body 1 is both a positioning device and a detection device, which fully ensures that the moving pair 20 can move smoothly, and the offset can be synchronously measured during the process of the moving pair 20 being docked and positioned. The device is combined with a deviation correction device, and under the control of an automatic control system, the measured offset can be fed back to the deviation correction device to drive the moving pair 20 back to compensate for the offset, so that the moving pair 20 is accurately aligned with the processing actuator, thereby improving the positioning accuracy of the production line.

[0037] The implementation principle of a positioning detection device in this embodiment is:

[0038] First, preset the standard position. Park the moving pair 20 at the work station, insert the latch body 1 into the pin hole 101, adjust the position of the moving pair 20 to the ideal processing position, and the abutment member 2 abuts against the inner wall of the pin hole 101. At this time, the distance between the outer peripheral wall of the latch body 1 and the inner wall of the pin hole 101 is e, and e is preset as the standard width. At this time, the position height of the displacement member 4 is h. Taking the height h as the base point, it is stipulated that the offset of the moving pair 20 at this time is zero.

[0039] Then, formal measurement is carried out. Start the normal operation of the production line. When the moving pair 20 stops at the work station, the latch body 1 is inserted into the pin hole 101 for positioning, limiting the moving pair 20 from continuing to move. The abutment member 2 is blocked by the inner wall of the pin hole 101 and moves sideways, pushing the displacement member 4 to slide upward; at this time, the distance between the outer wall of the latch body 1 and the inner wall of the pin hole 101 is e', and the offset of the moving pair 20 is Δe = e'-e; the displacement sensor 5 obtains the position height of the displacement member 4 at this time as h', and the height difference between the displacement member 4 and the base point Δh = h'-h, the conversion relationship between e' and h' is compiled into the control program, and Δh is measured by the displacement sensor 5, and Δe is obtained through calculation.

[0040] The displacement sensor 5 feeds back the measured lateral displacement Δe to the automatic control system configured for the production line. The automatic control system issues an instruction, and the correction device drives the moving pair 20 to move Δe in the opposite direction of the displacement, thereby compensating for the displacement and achieving the effect of calibrating the position of the moving pair 20.

[0041] Reference Figure 2 In this embodiment, the latch body 1 is cylindrical as a whole, and the accommodating cavity 11 is coaxially opened inside the latch body 1. The axial direction of the latch body 1 refers to the Z-axis direction. As can be seen in the figure, the abutment member 2, the transmission mechanism 3, the displacement member 4, and the displacement sensor 5 are arranged in sequence from bottom to top along the Z-axis. An outlet connected to the accommodating cavity 11 is opened on the outer peripheral wall of the latch body 1 near one end of the abutment member 2, so that the abutment member 2 can be extended and retracted.

[0042] Reference Figure 2 , Figure 3 Optionally, the transmission mechanism 3 includes a rocker rod 31 and a connecting rod 32, one end of the rocker rod 31 is hinged to the inner wall of the accommodating cavity 11, the other end of the rocker rod 31 is hinged to the abutment member 2, and both ends of the connecting rod 32 are hinged to the rocker rod 31 and the displacement member 4 respectively.

[0043] Specifically, the transmission mechanism 3 composed of the rocker arm 31 and the connecting rod 32 is hinged between the abutment member 2 and the displacement member 4 for transmission. It is simple and efficient, and can convert the X-axis displacement of the abutment member 2 into the Z-axis displacement of the displacement member 4. The conversion relationship between the displacement of the abutment member 2 and the displacement of the displacement member 4 can be obtained through geometric relationships.

[0044] Optionally, the abutment member 2 is a rigid wheel 21 , and the rigid wheel 21 is rotatably connected to the end of the rocker rod 31 .

[0045] Specifically, the abutment member 2 is set as a rigid wheel 21, which can prevent the latch body 1 from getting stuck due to the exposure of the abutment member 2 when it is plugged into the pin hole 101. The rigid wheel 21 moves and rotates, so that the latch body 1 can be smoothly inserted into the pin hole 101. The rigid wheel 21 abuts against the inner wall of the pin hole 101 without deformation, and the offset of the moving pair 20 can be measured more accurately.

[0046] In this embodiment, the rigid wheel 21 is a bearing.

[0047] Optionally, the displacement amount of the abutment member 2 along the radial direction of the latch body 1 is equal to the displacement amount of the displacement member 4 along the axial direction of the latch body 1 .

[0048] Specifically, the algebraic relationship between the length of the rocker 31, the length of the connecting rod 32 and the hinge position of the two can be obtained by calculating the geometric relationship so that the displacement of the bolt body 1 in the radial direction is equal to the displacement of the displacement member 4 in the axial direction of the bolt body 1. By controlling the size and position relationship of the rocker 31 and the connecting rod 32, the equal replacement of the displacement of the bolt body 1 in the X direction and the displacement of the displacement member 4 in the Z direction is achieved. Therefore, after the displacement sensor 5 measures the displacement of the displacement member 4 in the Z direction, the lateral displacement offset can be obtained more quickly and intuitively, and the calculation process during each detection is omitted, thereby improving the efficiency of lateral displacement detection.

[0049] Optionally, the displacement member 4 is slidably connected to the latch body 1, and the displacement member 4 includes a connecting frame 41 and a roller 42. One end of the connecting frame 41 along the axial direction of the latch body 1 is hinged to the connecting rod 32, and the other end of the connecting frame 41 abuts against the displacement sensor 5. The roller 42 is rotatably connected to the connecting frame 41 and is in rolling contact with the inner wall of the accommodating cavity 11.

[0050] Specifically, a roller 42 is rotatably provided on the connecting frame 41 , and the roller 42 abuts against the inner wall of the latch body 1 . When the displacement member 4 slides, the roller 42 can reduce the friction resistance, making the displacement member 4 slide more smoothly, thereby ensuring smooth detection.

[0051] In this embodiment, two rollers 42 are provided on the connecting frame 41 . The two rollers 42 can play a linear guiding role for the displacement of the connecting frame 41 . The rollers 42 are preferably bearings.

[0052] Optionally, a first elastic member 6 is provided between the connecting frame 41 and the displacement sensor 5 , and when the abutting member 2 is out of contact with the side wall of the pin hole 101 , the first elastic member 6 is used to drive the abutting member 2 to reset.

[0053] Specifically, the displacement sensor 5 is a contact sensor, the first elastic member 6 is a spring, and the first elastic member 6 is sleeved on the outer periphery of the contact end of the displacement sensor 5. The displacement member 4 pushes the contact end of the displacement sensor 5 to move upward, and the first elastic member 6 is squeezed. After the measurement is completed, after the pin body 1 is withdrawn from the pin hole 101, the first elastic member 6 releases the elastic force to drive the displacement member 4 and the displacement sensor 5 to reset downward.

[0054] Reference Figure 4 Optionally, the pin hole 101 is a waist-shaped hole arranged perpendicular to the travel direction of the moving pair 20 , and the pin hole 101 and the latch body 1 are clearance-matched in the travel direction of the moving pair 20 .

[0055] Specifically, the moving pair 20 moves along the Y axis, the Y axis direction is the front-to-back direction, and the pin hole 101 is set as a waist-shaped hole perpendicular to the moving direction, so that the front and rear outer side walls of the latch body 1 are both clearance-matched with the pin hole 101, and a wider gap is left on the left and right sides of the latch body 1, which can reserve enough space for the abutment 2 to move telescopically. The front and rear of the latch body 1 are both abutted against the side walls of the pin hole 101, and a small gap is preferably used here, which can improve the positioning accuracy of the latch body 1 and the pin hole 101 in the moving direction.

[0056] Reference Figure 2 , Figure 5 Optionally, it also includes a guide cylinder 7 and a locking mechanism 8, the guide cylinder 7 is coaxially sleeved on the outside of the latch body 1, the latch body 1 is slidably connected to the guide cylinder 7, the latch body 1 is connected to the moving pair 20 through the guide cylinder 7, and the locking mechanism 8 is arranged between the guide cylinder 7 and the latch body 1. The locking mechanism 8 is locked to limit the movement or rotation of the latch body 1 relative to the guide cylinder 7, and the locking mechanism is unlocked to allow the latch body 1 to move axially and extend out of the guide cylinder 7.

[0057] Specifically, the guide cylinder 7 is fixedly connected to the moving pair 20 by bolts, so that the positioning detection device can move with the moving pair 20 during the operation of the production line. During the movement, the guide cylinder 7 covers the outside of the latch body 1, which can protect the relatively fragile core detection components such as the abutment 2 and the transmission mechanism 3. After reaching the work station, the locking mechanism 8 is unlocked again, so that the latch body 1 can slide downward and be inserted into the pin hole 101.

[0058] Optionally, the locking mechanism 8 includes a limit groove 81, a clearance groove 82 and a locking key 83, the limit groove 81 and the clearance groove 82 are opened on the side wall of the guide cylinder 7, and the two are located in different directions, the locking key 83 is fixedly connected to the latch body 1, and the clearance groove 82 extends along the axial direction of the latch body 1.

[0059] When the locking mechanism 8 is in a locked state, the locking key 83 is plugged into the limiting groove 81 ; when the locking mechanism 8 is in an unlocked state, the locking key 83 is slidably engaged with the giving way groove 82 to enable the latch body 1 and the guide cylinder 7 to slide relative to each other.

[0060] Specifically, the latch body 1 passes through the top of the guide cylinder 7, the limiting groove 81 and the giving groove 82 are both provided at the top of the guide cylinder 7, the locking key 83 is vertically fixed on the outer peripheral wall of the latch body 1, the limiting groove 81 and the locking key 83 are plugged and matched, so that the latch body 1 is completely received in the guide cylinder 7. The inner wall of the limiting groove 81 is in contact with the outer peripheral wall of the locking key 83 to strengthen the fixing effect.

[0061] In this embodiment, the clearance groove 82 is preferably set to an L shape, which can realize the unlocking and then locking of the latch body 1. During the unlocking process, the locking key 83 is first lifted upward, the latch body 1 is rotated so that the locking key 83 faces the clearance groove 82, and then the locking key 83 is slid downward along the clearance groove 82. After the latch body 1 is inserted into the pin hole 101, the locking key 83 is further rotated so that the latch body 1 is inserted into the pin hole 101 and continues to be locked with the guide cylinder 7.

[0062] Reference Figure 2 , Figure 3 Optionally, a convex edge 12 is provided on the outer peripheral wall of the latch body 1, and the convex edge 12 abuts against the inner wall of the guide cylinder 7. A second elastic member 9 is provided between the latch body 1 and the guide cylinder 7, and the second elastic member 9 abuts against the convex edge 12. The second elastic member 9 is used to make the end face of the latch body 1 abut against the bottom wall of the pin hole 101.

[0063] Specifically, the second elastic member 9 is preferably a spring, which is sleeved on the outside of the latch body 1, and the two ends of the second elastic member 9 are respectively pressed against the convex edge 12 and the inner top wall of the accommodating cavity 11. When the locking mechanism 8 is unlocked, the second spring releases its elastic force, and the elastic force and the gravity of the latch body 1 work together to drive the latch body 1 to automatically insert into the pin hole 101. Under the elastic force of the second spring, the end face of the latch body 1 can be pressed against the bottom wall of the pin hole 101, which plays a stronger fixing and positioning role.

[0064] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A positioning detection device, characterized in that: It comprises a latch body (1), a pin hole (101), an abutment member (2), a transmission mechanism (3), a displacement member (4) and a displacement sensor (5); The pin hole (101) is opened on the ground (10), the latch body (1) is configured to move along with the moving pair (20), the latch body (1) is plugged and matched with the pin hole (101) so that the moving pair (20) can stop at a fixed point, a receiving cavity (11) is coaxially arranged inside the latch body (1), the abutment member (2), the transmission mechanism (3), the displacement member (4) and the displacement sensor (5) are all movably installed in the receiving cavity (11), and the abutment member (2) is configured to be retracted and contracted along the radial direction of the latch body (1); When the latch body (1) is not plugged into the pin hole (101), the abutment member (2) is configured to extend outward from the accommodating cavity (11); when the latch body (1) is plugged into the pin hole (101), the abutment member (2) is configured to retract into the accommodating cavity (11) under the abutment and limiting action of the inner wall of the pin hole (101); the transmission mechanism (3) is connected between the abutment member (2) and the displacement member (4); the transmission mechanism (3) is used to convert the radial displacement of the abutment member (2) into the axial displacement of the displacement member (4) along the latch body (1); and the displacement sensor (5) is used to measure the displacement amount of the displacement member (4).

2. The positioning detection device according to claim 1, characterized in that: The transmission mechanism (3) comprises a rocker rod (31) and a connecting rod (32); one end of the rocker rod (31) is hinged to the inner wall of the accommodating cavity (11); the other end of the rocker rod (31) is hinged to the abutment member (2); and both ends of the connecting rod (32) are respectively hinged to the rocker rod (31) and the displacement member (4).

3. The positioning detection device according to claim 2, characterized in that: The abutment member (2) is a rigid wheel (21), and the rigid wheel (21) is rotatably connected to the end of the swing rod (31).

4. The positioning detection device according to claim 1, characterized in that: The displacement amount of the abutment member (2) along the radial direction of the latch body (1) is equal to the displacement amount of the displacement member (4) along the axial direction of the latch body (1).

5. The positioning detection device according to claim 2, characterized in that: The displacement member (4) comprises a connecting frame (41) and a roller (42); one end of the connecting frame (41) along the axial direction of the latch body (1) is hinged to the connecting rod (32); the other end of the connecting frame (41) abuts against the displacement sensor (5); and the roller (42) is rotatably connected to the connecting frame (41) and is in rolling contact with the inner wall of the accommodating cavity (11).

6. The positioning detection device according to claim 5, characterized in that: A first elastic member (6) is provided between the connecting frame (41) and the displacement sensor (5), and when the abutment member (2) is out of contact with the side wall of the pin hole (101), the first elastic member (6) is used to drive the abutment member (2) to reset.

7. The positioning detection device according to claim 1, characterized in that: The pin hole (101) is a waist-shaped hole arranged perpendicular to the travel direction of the moving pair (20), and the pin hole (101) and the latch body (1) are clearance-matched in the travel direction of the moving pair (20).

8. The positioning detection device according to claim 1, characterized in that: The invention also comprises a guide cylinder (7) and a locking mechanism (8), wherein the guide cylinder (7) is coaxially sleeved on the outside of the latch body (1), the latch body (1) is slidably connected to the guide cylinder (7), the latch body (1) is connected to the moving pair (20) via the guide cylinder (7), the locking mechanism (8) is arranged between the guide cylinder (7) and the latch body (1), the locking mechanism (8) is locked to restrict the latch body (1) from moving or rotating relative to the guide cylinder (7), and the locking mechanism is unlocked to allow the latch body (1) to move axially and extend out of the guide cylinder (7).

9. The positioning detection device according to claim 8, characterized in that: The locking mechanism (8) comprises a limiting groove (81), a giving groove (82) and a locking key (83); the limiting groove (81) and the giving groove (82) are arranged on the side wall of the guide cylinder (7) and are located in different directions; the locking key (83) is fixedly connected to the latch body (1); and the giving groove (82) extends along the axial direction of the latch body (1); When the locking mechanism (8) is in a locked state, the locking key (83) is plugged into the limiting groove (81); when the locking mechanism (8) is in an unlocked state, the locking key (83) is slidably engaged with the giving way groove (82) to enable the latch body (1) and the guide cylinder (7) to slide relative to each other.

10. The positioning detection device according to claim 8, characterized in that: A convex edge (12) is provided on the outer peripheral wall of the latch body (1), and the convex edge (12) abuts against the inner wall of the guide cylinder (7). A second elastic member (9) is provided between the latch body (1) and the guide cylinder (7), and the second elastic member (9) abuts against the convex edge (12). The second elastic member (9) is used to make the end face of the latch body (1) abut against the bottom wall of the pin hole (101).

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