Device and method for detecting hole site error of automobile gearbox body casting

Abstract

The invention discloses an automobile gearbox body casting hole site error detection device and method, and belongs to the technical field of automobile casting detection.The automobile gearbox body casting hole site error detection device comprises a bottom plate used for positioning and installing an automobile gearbox body casting, positioning holes are formed in the bottom plate, a detection ring is installed at the bottom of the bottom plate, and a first through hole is formed in the detection ring; an offset detection assembly is installed in the detection ring, the offset detection assembly comprises a plurality of clamping rods which are arranged in the circumferential direction with the axis of the detection ring as the center, a threaded rod is in threaded connection with the interior of the detection ring, and first springs and distance measuring sensors used for measuring the distance between the threaded rod and the clamping rods are fixedly installed between the threaded rod and the clamping rods; a driving plate is slidably mounted on the support, a detection rod is arranged on the driving plate, the diameter of the detection rod is smaller than that of the first through hole, and the detection end, away from the driving plate, of the detection rod is circular-truncated-cone-shaped. According to the invention, the offset and the offset direction of the to-be-detected hole can be automatically judged through the distance measuring sensor, and the detection efficiency and the detection accuracy are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile casting detection, and in particular relates to a device and method for detecting hole position errors of automobile gearbox case castings. Background Art

[0002] The hole processing accuracy of automobile gearbox housing casting products is high. Usually, they are processed and formed again after casting. During the secondary processing of the holes, certain position deviations will occur, affecting product quality. Therefore, a hole error detection device is needed for detection.

[0003] In the prior art, a Chinese patent with announcement number CN117928336B discloses a hole position error detection device for automobile gearbox housing castings, in which a measuring rod is affected by the reaction force of the hole to be measured and drives the slider and the slip ring to move along the plane of the connecting platform through the connecting sleeve. After stopping the downward pressure, the specific value of the hole position deviation can be known by reading the first scale line corresponding to each side of the slider. However, in the above technology, after the measuring rod is radially moved by the hole to be measured, the value of the first scale line needs to be read manually, resulting in low detection efficiency and accuracy.

[0004] Therefore, it is necessary to propose a device and method for detecting hole position errors of automobile gearbox case castings to solve the above problems. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a device and method for detecting hole position errors of automobile gearbox case castings, so as to solve the problems of low detection efficiency and accuracy in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a device for detecting hole position errors of automobile gearbox case castings, comprising a bottom plate for positioning and installing automobile gearbox case castings, the bottom plate being provided with positioning holes, a bracket being fixedly installed at the bottom of the bottom plate, a detection ring being fixedly installed on the bracket, a first through hole extending along the axis direction of the detection ring being provided in the detection ring, an offset detection component being installed in the detection ring, the offset detection component comprising a plurality of clamping rods circumferentially arranged with the axis of the detection ring as the center, the clamping rods being able to slide along the radial direction of the detection ring, and a clamping rod being threadedly connected to the detection ring with a first through hole extending along the axis direction of the detection ring. A screw rod is coaxially arranged on the rod, and first limit plates are rotatably installed at both ends of the screw rod, a first spring is fixedly connected between the first limit plate on the side of the screw rod close to the clamping rod and the clamping rod, a distance measuring sensor for measuring the distance between the screw rod and the clamping rod is installed between the screw and the clamping rod, a driving plate that can move axially along the first through hole is slidably installed on the bracket, and a detection rod that can move radially along the first through hole is slidably installed on the driving plate, the diameter of the detection rod is smaller than the diameter of the first through hole, and the detection end of the detection rod away from the driving plate side is set to a truncated cone shape.

[0008] Furthermore, a cavity is provided in the driving plate, a moving block capable of sliding radially along the cavity is installed in the cavity, a plurality of telescopic rods arranged with the cavity axis as the center are hingedly installed between the moving block and the inner wall of the cavity, a second through hole connected to the cavity is provided on the driving plate, the detection rod is fixedly installed on the moving block and axially passes through the second through hole, and the diameter of the detection rod is smaller than the diameter of the second through hole.

[0009] Furthermore, a cylindrical gear is installed on the screw rod for rotation away from the clamping rod end, and the cylindrical gear extends out of the detection ring away from the screw rod end. The outer wall of the detection ring is connected to a gear ring for limited rotation and is meshed with multiple cylindrical gears. Rotating the gear ring can rotate the cylindrical gear to drive the screw rod to rotate and can cause the cylindrical gear to move axially along the screw rod.

[0010] Furthermore, the clamping rod is rotatably mounted with a second limit plate near the end of the screw rod, the first spring is fixedly connected between the first limit plate and the second limit plate, and the first limit plate and the second limit plate are both limitedly slidably connected in the detection ring.

[0011] Furthermore, at least two groups of biased detection components are installed in the detection ring along the axial direction of the detection ring.

[0012] Furthermore, the bracket is provided with a partition and a base frame, the partition is arranged between the base frame and the bottom plate, the partition is provided with a third through hole consistent with the aperture of the first through hole, the detection ring is fixedly mounted on the partition and the first through hole and the third through hole are coaxially arranged, a driving rod capable of sliding along the axial direction of the first through hole is slidably mounted on the base frame, one end of the driving rod extends to between the partition and the base frame and is fixedly connected to the driving plate, the driving plate is fixedly connected to the base frame or the partition by a second spring, and a gap is provided between the top wall of the driving plate and the bottom wall of the partition.

[0013] Furthermore, the moving block is provided with a socket matching the diameter of the detection rod, the detection rod is slidably installed in the socket, a third spring is fixedly connected between the detection rod and the bottom wall of the socket, and a pressure sensor for monitoring the pressure on the detection rod is installed in the socket.

[0014] Furthermore, a mounting portion is fixedly provided on the detection ring, a mounting hole matching with the mounting portion is provided on the bottom plate, and the bracket is installed on the bottom plate so that the mounting portion matches with the mounting hole, and the first through hole is used as a positioning hole.

[0015] A detection method for a hole position error detection device for a car gearbox housing casting comprises the following steps:

[0016] S1: Install the bracket on the bottom of the base plate, and make the mounting part fit into the mounting hole, and rotate the gear ring to drive multiple cylindrical gears arranged circumferentially of the detection ring to rotate synchronously, so that multiple screws rotate synchronously until multiple clamping rods abut against the outer wall of the detection rod, wherein when the third spring is in a normal state, the detection rod is located in the first through hole;

[0017] S2: Observe the values ​​fed back by each distance sensor. If the values ​​are inconsistent, continue to rotate the gear ring until the values ​​fed back by each distance sensor are consistent.

[0018] S3: Slide the driving rod to drive the driving plate to move, thereby driving the detection rod to move close to the hole to be detected;

[0019] After the detection rod moves a preset displacement along the axial direction of the first through hole, when the pressure value sensed by the pressure sensor in the jack exceeds the threshold value, it means that the detection rod abuts against the outside of the hole to be tested after passing through the positioning hole, and the offset between the hole to be tested and the positioning hole exceeds the preset qualified range, that is, the position deviation of the hole to be tested does not meet the qualified standard;

[0020] After the detection rod moves along the first through hole axially by a preset displacement, if the pressure value sensed by the pressure sensor of the jack does not change, it means that the detection rod passes through the positioning hole and is coaxially arranged with the hole to be measured, which means that the hole to be measured has no offset and the position deviation of the hole to be measured meets the qualified standard;

[0021] After the detection rod moves a preset displacement axially along the first through hole, the pressure value sensed by the pressure sensor of the jack changes and does not exceed the threshold value, which means that when the detection rod enters the hole to be measured, the detection end of the detection rod abuts against the side wall of the hole to be measured, and when the detection rod continues to move axially along the first through hole, the detection end of the detection rod drives the detection rod to move in a direction close to the axis of the hole to be measured, thereby moving the clamping rod in the corresponding direction, thereby compressing the first spring, and changing the distance between the corresponding clamping rod and the screw rod, so that the value sensed by the distance measuring sensor changes, and the offset and offset direction of the hole to be measured are determined according to the change in the value of the distance measuring sensor; wherein, the offset direction is the direction in which the change in the value of the distance measuring sensor is the largest, and the offset is the change in the direction in which the change in the value of the distance measuring sensor is the largest.

[0022] The beneficial effects of the present invention are:

[0023] The present invention can automatically determine the offset and offset direction of the hole to be measured by the distance measuring sensor, and the aperture of the first through hole is larger than the diameter of the detection rod, so the detection of different apertures of holes to be measured can be applied by replacing detection rods with different diameters.

[0024] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0026] Figure 1 This is a schematic diagram of the structure of the detection state of an embodiment of the present invention;

[0027] Figure 2 A partial cross-sectional view of the structure of the embodiment of the present invention in the detection state;

[0028] Figure 3 A cross-sectional view of the structure of the detection ring and the detection rod in the embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of the structure of the driving plate and the detection rod in the embodiment of the present invention.

[0030] The markings in the accompanying drawings are as follows: base plate 1, positioning hole 101, mounting hole 102, bracket 2, partition plate 201, base frame 202, third through hole 203, drive rod 204, second spring 205, automobile gearbox case casting 3, hole to be measured 301, detection ring 4, clamping rod 401, screw rod 402, first limit plate 403, first spring 404, cylindrical gear 405, gear ring 406, second limit plate 407, first through hole 408, drive plate 5, cavity 501, moving block 502, telescopic rod 503, second through hole 504, detection rod 505, jack 506, third spring 507, mounting part 6. DETAILED DESCRIPTION

[0031] like Figures 1 to 4 As shown, the present invention provides a device for detecting hole position errors of automobile gearbox case castings, comprising: a bottom plate 1, a positioning block (not shown in the figure) is arranged on the bottom plate 1, the positioning block is used to cooperate with the automobile gearbox case casting 3 so that the automobile gearbox case casting 3 is positioned and installed on the bottom plate 1, a positioning hole 101 is arranged on the bottom plate 1, a bracket 2 is fixedly installed at the bottom of the bottom plate 1, a detection ring 4 is fixedly installed on the bracket 2, a first through hole 408 extending along the axial direction of the detection ring 4 is arranged in the detection ring 4, an offset detection component is installed in the detection ring 4, the offset detection component comprises a plurality of clamping rods 401 circumferentially slidably installed with the axis of the detection ring 4 as the center, the clamping rod 401 can move in the radial direction of the detection ring 4, a screw 402 coaxially arranged with the clamping rod 401 is connected to the inner thread of the detection ring 4, a first limit plate 403 is rotatably installed at both ends of the screw 402, and the first limit plate 403 on the side of the screw 402 close to the clamping rod 401 A first spring 404 is fixedly connected to the clamping rod 401, a distance sensor for measuring the distance between the screw rod 402 and the clamping rod 401 is installed between the screw rod 402 and the clamping rod 401, a driving plate 5 is slidably installed on the bracket 2, a cavity 501 is provided in the driving plate 5, a moving block 502 is slidably installed in the cavity 501, and a plurality of telescopic rods 503 arranged with the axis of the cavity 501 as the center are hingedly installed between the moving block 502 and the inner wall of the cavity 501, The driving plate 5 is provided with a second through hole 504 connected to the cavity 501, and the moving block 502 is fixedly connected with a detection rod 505 coaxially arranged with the second through hole 504. The diameter of the detection rod 505 is smaller than the diameters of the first through hole 408 and the second through hole 504. The detection end of the detection rod 505 away from the driving plate 5 side is set in a truncated cone shape. Sliding the driving plate 5 can move the detection rod 505 to pass through the first through hole 408 and the positioning hole 101 to cooperate with the hole to be measured 301.

[0032] In the present solution, the installation position and shape of the positioning block can be adjusted according to the shape of the automobile gearbox case casting 3, so that after the automobile gearbox case casting 3 is positioned and installed on the base plate 1, the hole to be measured 301 of the automobile gearbox case casting 3 matches the positioning hole 101, and then the detection rod 505 is passed through the positioning hole 101 and connected to the hole to be measured 301 by sliding the driving plate 5, wherein, after the detection rod 505 slides into the first through hole 408, the clamping rod 401 is driven to move toward the detection rod 505 through the first spring 404 by rotating the screw 402, so that the multiple clamping rods 401 circumferentially arranged in the first through hole 408 are all against the detection rod 505, and at this time, the value sensed by each ranging sensor is obtained by the control system, if the values ​​are consistent, it means that the detection rod 505 is coaxially arranged with the first through hole 408, if the values ​​are inconsistent, it is necessary to rotate the screw 402 to make the values ​​sensed by each ranging sensor consistent.

[0033] After the values ​​sensed by each distance measuring sensor are consistent, continue to move the detection rod 505 to make the detection rod 505 pass through the positioning hole 101; if the detection rod 505 abuts against the outside of the hole 301 to be measured after passing through the positioning hole 101, it means that the offset between the hole 301 to be measured and the positioning hole 101 exceeds the preset qualified range, that is, the position deviation of the hole 301 to be measured does not meet the qualified standard; if the detection rod 505 can slide into the hole 301 to be measured after passing through the positioning hole 101, if the detection rod 505 and the hole 301 to be measured are perfectly matched, that is, they are coaxially arranged, it means that the hole 301 to be measured has no offset; if the detection rod 505 is , the detection end of the detection rod 505 is against the hole 301 to be measured. During the continued movement, the detection rod 505 will move in the direction close to the axis of the hole 301 to be measured (offset from the axis of the first through hole 408). During the movement, the moving block 503 moves synchronously, and when the detection rod 505 moves offset from the axis of the first through hole 408, it drives the clamping rod 401 in the corresponding direction to move, thereby compressing the first spring 404, and the corresponding distance between the clamping rod 401 and the screw 402 changes, so that the value sensed by the distance measuring sensor changes, and the offset amount and offset direction of the hole 301 to be measured are judged by the change in the value.

[0034] Through the design of the above structure, this solution can automatically determine the offset and offset direction of the hole 301 to be measured through the distance measuring sensor, and because the aperture of the first through hole 408 is larger than the diameter of the detection rod 505, by replacing the detection rod 505 with different diameters, it can be suitable for the detection of different apertures of the hole 301 to be measured.

[0035] In one embodiment of the present invention, a cylindrical gear 405 is rotatably installed at the end of the screw 402 away from the clamping rod 401, and the cylindrical gear 405 extends out of the detection ring 4 away from the end of the screw 402. The outer wall of the detection ring 4 is limitedly rotatably connected to a gear ring 406 that meshes with multiple cylindrical gears 405. Rotating the gear ring 406 can rotate the cylindrical gear 405 to drive the screw 402 to rotate and can cause the cylindrical gear 405 to move axially along the screw 402.

[0036] In this solution, by rotating the gear ring 406, multiple column gears 405 are rotated synchronously, so that multiple clamping rods 401 can synchronously clamp the detection rod 505 extending into the first through hole 408, so as to save manpower and ensure that the axis of the detection rod 505 is on the same straight line as the axis of the first through hole 408. At the same time, by rotating the gear ring 406, the detection rod 505 can be fine-tuned.

[0037] In one embodiment of the present invention, the clamping rod 401 is rotatably installed with a second limit plate 407 near the end of the screw rod 402, the first spring 404 is fixedly connected between the first limit plate 403 and the second limit plate 407, and the first limit plate 403 and the second limit plate 407 are both limitedly slidably connected in the detection ring 4.

[0038] In this solution, when the screw rod 402 is rotated to make the screw rod 402 move axially, the first limit plate 403 is driven to move axially, thereby stretching or compressing the first spring 404, and then the clamping rod 401 is driven to move axially through the second limit plate 407, thereby reducing the torsion applied to the first spring 404 by the screw rod 402 and the clamping rod 401 when the axial movement occurs, ensuring that the first spring 404 is only subjected to axial pressure or tension, so that the clamping force of the clamping rod 401 on the side wall of the detection rod 505 is more uniform.

[0039] In one embodiment of the present invention, at least two groups of offset detection components are installed in the detection ring 4 along the axial direction of the detection ring 4.

[0040] In this solution, two groups of biased detection components are arranged in the detection ring 4. The two groups of biased detection components are arranged side by side or symmetrically. By arranging two groups of biased detection components, the coaxiality between the detection rod 505 and the first through hole 408 is further strengthened.

[0041] In one embodiment of the present invention, a partition 201 and a base frame 202 are provided on the bracket 2, the partition 201 is provided between the base frame 202 and the bottom plate 1, the partition 201 is provided with a third through hole 203 having the same aperture as the first through hole 408, the detection ring 4 is fixedly mounted on the partition 201 and the first through hole 408 and the third through hole 203 are coaxially arranged, a driving rod 204 capable of sliding along the axial direction of the first through hole 408 is slidably mounted on the base frame 202, one end of the driving rod 204 extends to between the partition 201 and the base frame 202 and is fixedly connected to the driving plate 5, the driving plate 5 is fixedly connected to the base frame 202 or the partition 201 by a second spring 205, and a gap is provided between the top wall of the driving plate 5 and the bottom wall of the partition 201.

[0042] In this solution, the moving driving rod 204 can move the driving plate 5 to deform the second spring 205, and the third through hole 203 is used to avoid the detection rod 505. After the detection is completed, the driving plate 5 can be returned to its original position through the second spring 205. The movement of the driving rod 204 can be driven by a cylinder or an electric cylinder for outputting linear motion to improve the detection efficiency.

[0043] In one embodiment of the present invention, the moving block 502 is provided with a socket 506 that matches the diameter of the detection rod 505, and the detection rod 505 is slidably installed in the socket 506. A third spring 507 is fixedly connected between the detection rod 505 and the bottom wall of the socket 506, and a pressure sensor for monitoring the pressure on the detection rod 505 is installed in the socket 506.

[0044] In the present solution, when the driving rod 204 is driven by the cylinder to move the detection rod 505, if the hole to be measured 301 does not match the positioning hole 101 and causes the detection end of the detection rod 505 to abut against the outer wall of the hole to be measured 301, a third spring 507 can be provided to provide a buffering effect to avoid damage to the detection rod 505 or the outer wall of the hole to be measured 301.

[0045] In one embodiment of the present invention, the detection ring 4 is fixedly provided with a mounting portion 6, the bottom plate 1 is provided with a mounting hole 102 that matches the mounting portion 6, and after the bracket 2 is installed on the bottom plate 1, the mounting portion 6 matches the mounting hole 102 to facilitate overall installation and disassembly, and at this time, the first through hole 408 is a positioning hole 101.

[0046] A detection method for a hole position error detection device for a car gearbox housing casting comprises the following steps:

[0047] S1: The bracket 2 is mounted on the bottom of the base plate 1, and the mounting portion 6 is matched with the mounting hole 102, and the rotating gear ring 406 drives the multiple cylindrical gears 405 arranged circumferentially of the detection ring 4 to rotate synchronously, so that the multiple screw rods 402 rotate synchronously until the multiple clamping rods 401 are against the outer wall of the detection rod 505, wherein when the third spring 507 is in a normal state, the detection rod 505 is located in the first through hole 408;

[0048] S2: Observe the values ​​fed back by each distance measuring sensor. If the values ​​are inconsistent, continue to rotate the gear ring 406 until the values ​​fed back by each distance measuring sensor are consistent.

[0049] S3: Slide the driving rod 204 to drive the driving plate 5 to move, thereby driving the detection rod 505 to move close to the hole to be detected 301,

[0050] After the detection rod 505 moves axially along the first through hole 408 by a preset displacement, when the pressure value sensed by the pressure sensor in the plug hole 506 exceeds the threshold value, it means that the detection rod 505 abuts against the outside of the hole to be tested 301 after passing through the positioning hole 101, and the offset between the hole to be tested 301 and the positioning hole 101 exceeds the preset qualified range, that is, the position deviation of the hole to be tested 301 does not meet the qualified standard;

[0051] After the detection rod 505 moves axially along the first through hole 408 by a preset displacement, if the pressure value sensed by the pressure sensor of the jack 506 does not change, it means that the detection rod 505 passes through the positioning hole 101 and is coaxially arranged with the hole to be measured 301, which means that the hole to be measured 301 has no deviation;

[0052] After the detection rod 505 moves axially along the first through hole 408 by a preset displacement, the pressure value sensed by the pressure sensor of the jack 506 changes and does not exceed the threshold value, which means that when the detection rod 505 enters the hole 301 to be measured, the detection end of the detection rod 505 abuts against the side wall of the hole 301 to be measured. When the detection rod 505 continues to move axially along the first through hole 408, the detection end of the detection rod 505 drives the detection rod 505 to move in the direction close to the axis of the hole 301 to be measured, so that the clamping rod 401 in the corresponding direction moves, thereby compressing the first spring 404, and the corresponding distance between the clamping rod 401 and the screw 402 changes, so that the value sensed by the distance sensor changes, and the offset and offset direction of the hole 301 to be measured are determined according to the change in the value of the distance sensor. Among them, the offset direction is the direction in which the value of the distance sensor changes the most, and the offset is the change in the direction in which the value of the distance sensor changes the most.

[0053] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A hole position error detection device for automobile gearbox case casting, comprising a base plate for positioning and installing the automobile gearbox case casting, characterized in that: The bottom plate is provided with a positioning hole, the bottom of the bottom plate is fixedly installed with a bracket, a detection ring is fixedly installed on the bracket, a first through hole extending along the axial direction of the detection ring is provided in the detection ring, a bias detection assembly is installed in the detection ring, and the bias detection assembly includes a plurality of clamping rods circumferentially arranged with the axis of the detection ring as the center, the clamping rod can slide along the radial direction of the detection ring, a screw coaxially arranged with the clamping rod is connected to the inner thread of the detection ring, a first limit plate is rotatably installed at both ends of the screw, a first spring is fixedly connected between the first limit plate on the side of the screw close to the clamping rod and the clamping rod, a distance measuring sensor for measuring the distance between the screw and the clamping rod is installed between the screw and the clamping rod, a driving plate that can move axially along the first through hole is slidably installed on the bracket, and a detection rod that can move radially along the first through hole is slidably installed on the driving plate, the diameter of the detection rod is smaller than the diameter of the first through hole, and the detection end of the detection rod away from the driving plate side is set to a truncated cone shape.

2. The automobile gearbox case casting hole position error detection device according to claim 1 is characterized in that: A cavity is provided in the driving plate, and a moving block capable of sliding radially along the cavity is installed in the cavity. A plurality of telescopic rods arranged with the axis of the cavity as the center are hingedly installed between the moving block and the inner wall of the cavity. A second through hole communicating with the cavity is provided on the driving plate, and the detection rod is fixedly installed on the moving block and axially passes through the second through hole, and the diameter of the detection rod is smaller than the diameter of the second through hole.

3. The hole position error detection device for automobile gearbox case casting according to claim 2 is characterized in that: The screw is rotatably mounted with a cylindrical gear away from the clamping rod end, and the cylindrical gear extends out of the detection ring away from the screw end. The outer wall of the detection ring is rotationally connected with a gear ring that meshes with multiple cylindrical gears. Rotating the gear ring can rotate the cylindrical gear to drive the screw to rotate and can cause the cylindrical gear to move axially along the screw.

4. The automobile gearbox case casting hole position error detection device according to claim 3 is characterized in that: The clamping rod is rotatably mounted with a second limit plate near the end of the screw rod, the first spring is fixedly connected between the first limit plate and the second limit plate, and the first limit plate and the second limit plate are both limitatively slidably connected in the detection ring.

5. The automobile gearbox case casting hole position error detection device according to claim 4 is characterized in that: At least two groups of bias detection components are installed in the detection ring along the axial direction of the detection ring.

6. The automobile gearbox case casting hole position error detection device according to claim 5, characterized in that: The bracket is provided with a partition and a base frame, the partition is arranged between the base frame and the bottom plate, the partition is provided with a third through hole consistent with the aperture of the first through hole, the detection ring is fixedly mounted on the partition and the first through hole and the third through hole are coaxially arranged, a driving rod that can slide along the axis direction of the first through hole is slidably mounted on the base frame, one end of the driving rod extends to between the partition and the base frame and is fixedly connected to the driving plate, the driving plate is fixedly connected to the base frame or the partition by a second spring, and a gap is provided between the top wall of the driving plate and the bottom wall of the partition.

7. The automobile gearbox case casting hole position error detection device according to claim 6, characterized in that: The moving block is provided with a socket matching the diameter of the detection rod, the detection rod is slidably installed in the socket, a third spring is fixedly connected between the detection rod and the bottom wall of the socket, and a pressure sensor for monitoring the pressure on the detection rod is installed in the socket.

8. The automobile gearbox case casting hole position error detection device according to claim 7, characterized in that: The detection ring is fixedly provided with a mounting portion, the bottom plate is provided with a mounting hole matched with the mounting portion, the bracket is mounted on the bottom plate so that the mounting portion can match with the mounting hole, and the first through hole is used as a positioning hole.

9. The detection method of the automobile gearbox case casting hole position error detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Install the bracket on the bottom of the base plate, and make the mounting part fit into the mounting hole, and rotate the gear ring to drive multiple cylindrical gears arranged circumferentially of the detection ring to rotate synchronously, so that multiple screws rotate synchronously until multiple clamping rods abut against the outer wall of the detection rod, wherein when the third spring is in a normal state, the detection rod is located in the first through hole; S2: Observe the values ​​fed back by each distance sensor. If the values ​​are inconsistent, continue to rotate the gear ring until the values ​​fed back by each distance sensor are consistent. S3: Slide the driving rod to drive the driving plate to move, thereby driving the detection rod to move close to the hole to be detected; After the detection rod moves a preset displacement along the axial direction of the first through hole, when the pressure value sensed by the pressure sensor in the jack exceeds the threshold value, it means that the detection rod abuts against the outside of the hole to be tested after passing through the positioning hole, and the offset between the hole to be tested and the positioning hole exceeds the preset qualified range, that is, the position deviation of the hole to be tested does not meet the qualified standard; After the detection rod moves along the first through hole axially by a preset displacement, if the pressure value sensed by the pressure sensor of the jack does not change, it means that the detection rod passes through the positioning hole and is coaxially arranged with the hole to be measured, which means that the hole to be measured has no offset and the position deviation of the hole to be measured meets the qualified standard; After the detection rod moves a preset displacement axially along the first through hole, the pressure value sensed by the pressure sensor of the jack changes and does not exceed the threshold value, which means that when the detection rod enters the hole to be measured, the detection end of the detection rod abuts against the side wall of the hole to be measured, and when the detection rod continues to move axially along the first through hole, the detection end of the detection rod drives the detection rod to move in a direction close to the axis of the hole to be measured, thereby moving the clamping rod in the corresponding direction, thereby compressing the first spring, and changing the distance between the corresponding clamping rod and the screw rod, so that the value sensed by the distance measuring sensor changes, and the offset and offset direction of the hole to be measured are determined according to the change in the value of the distance measuring sensor; wherein, the offset direction is the direction in which the change in the value of the distance measuring sensor is the largest, and the offset is the change in the direction in which the change in the value of the distance measuring sensor is the largest.

Images