CN212109965U - Central shaft of steering column detection machine and column detection device - Google Patents
Central shaft of steering column detection machine and column detection device Download PDFInfo
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- CN212109965U CN212109965U CN202021313802.5U CN202021313802U CN212109965U CN 212109965 U CN212109965 U CN 212109965U CN 202021313802 U CN202021313802 U CN 202021313802U CN 212109965 U CN212109965 U CN 212109965U
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Abstract
The utility model relates to a detection device, concretely relates to center pin and tubular column detection device that steering column detected board. The device comprises a clamping fixed platform, an angle detection head and a central shaft detection head, wherein the angle detection head is arranged on one side of the clamping fixed platform, and the central shaft detection head is arranged above the angle detection head. The device can detect the rotation angle and the rotation resistance of a workpiece pipe column and the holding force of a handle through an angle detection head in the detection process, can detect the telescopic adjusting force and the no-load moment of a workpiece central shaft through a central shaft detection head, can visually observe and compare detection parameters, and further can parametrize and accurately detect the quality of a workpiece; the problems that the existing detection device is inaccurate in detection result, large in labor intensity and low in working efficiency, and the detection process cannot be parameterized are solved, and the device is particularly suitable for detecting the central shaft and the pipe column of the steering pipe column.
Description
Technical Field
The utility model relates to a detection device, concretely relates to center pin and tubular column detection device that steering column detected board.
Background
The operation performance of the automobile steering column needs to be confirmed in the general assembly process so as to ensure the quality of the automobile steering column, and the important process in the general assembly process is an important link for ensuring the consistency of the loading process in the large-scale online manufacturing and the early stage of the mass production of products.
The traditional detection is to confirm the operation performance of the steering column repeatedly by people, and has the following disadvantages: 1. due to the individual difference among operators, the performance of the steering column after detection is greatly different, namely the detection result is inaccurate; 2. the process of detecting performance cannot be parameterized, and further, the difference of performance cannot be displayed intuitively; 3. the detection process is that the different aspects of steering column performance are detected for many prefaces, need confirm repeatedly simultaneously, lead to intensity of labour big and work efficiency lower.
Disclosure of Invention
The utility model aims at: the central shaft of the steering column detection machine table and the column detection device can parameterize the detection process, effectively reduce labor intensity and improve working efficiency.
The technical scheme of the utility model is that:
a central shaft of a steering column detection machine table and a column detection device are composed of a clamping fixed table, an angle detection head and a central shaft detection head, wherein the angle detection head is arranged on one side of the clamping fixed table, and the central shaft detection head is arranged above the angle detection head; the method is characterized in that: the angle detection head consists of a supporting seat, a pushing block, an electric cylinder of the pushing block and a pressure sensor, wherein the pushing block is arranged on the top end surface of the supporting seat through symmetrically arranged sliding rails; a pushing block electric cylinder is arranged on the supporting seat between the sliding rails, and a piston rod of the pushing block electric cylinder is fixedly connected with the pushing block through a pressure sensor.
The top end face of the supporting seat is arranged in an inclined shape.
The central shaft detection head is composed of a mounting seat, a rotating motor, a motor moving electric cylinder, a detection clamping jaw and a connecting sleeve, the rotating motor is movably mounted on the top end face of the mounting seat through a sliding rail, the motor moving electric cylinder is arranged on the mounting seat on one side of the rotating motor, and a piston rod of the motor moving electric cylinder is fixedly connected with the rotating motor; the other side of the rotating motor is provided with a detection clamping jaw which is fixedly connected with the rotating motor through a tension and pressure sensor; and a connecting sleeve is arranged between the detection clamping jaws and is fixedly connected with an output shaft of the rotating motor penetrating through the tension pressure sensor through a torque sensor.
The top end surface of the mounting seat is in a slope shape.
The beneficial effects of the utility model reside in that:
the central shaft and the pipe column detection device of the steering pipe column detection machine table can conveniently clamp and fix a workpiece through the clamping and fixing table in the detection process, can detect the rotation angle and the rotation resistance of a workpiece pipe column and the holding force of a handle through the angle detection head, can detect the telescopic adjustment force and the no-load moment of the central shaft of the workpiece through the central shaft detection head, can visually observe and compare detection parameters, and further can parametrically and accurately detect the quality of the workpiece; the problems that the existing detection device is inaccurate in detection result, large in labor intensity and low in working efficiency, and the detection process cannot be parameterized are solved, and the device is particularly suitable for detecting the central shaft and the pipe column of the steering pipe column.
Drawings
FIG. 1 is a schematic structural view of an angle detecting head according to the present invention;
FIG. 2 is a schematic right-side view of FIG. 1;
fig. 3 is a schematic structural view of the center shaft detecting head of the present invention;
FIG. 4 is a schematic front view of FIG. 3;
FIG. 5 is a schematic left side view of FIG. 3;
fig. 6 is an assembly schematic of the present invention;
fig. 7 is a graph of the central shaft expansion adjusting force of the present invention;
fig. 8 is a graph of the center shaft no-load moment of the present invention;
fig. 9 is a graph of the rotation resistance and rotation angle of the pipe column of the present invention;
fig. 10 is a graph of handle retention of the present invention;
FIG. 11 is a graph of mandrel to string clearance in the present invention.
In the figure: 1. clamping fixed station, 2, angle detection head, 201, supporting seat, 202, pass the piece, 203, pass the electronic jar of piece, 204, pressure sensor, 3, center pin detection head, 301, mount pad, 302, rotating electrical machines, 303, motor removal electronic jar, 304, detect clamping jaw, 305, connecting sleeve, 306, draw pressure sensor, 307, torque sensor, 4, switch board, 5, display screen, 6, work piece, 7, unsteady adapter.
Detailed Description
The central shaft and pipe column detection device of the steering pipe column detection machine table consists of a clamping fixed table 1, an angle detection head 2 and a central shaft detection head 3, wherein the angle detection head 2 is arranged on one side of the clamping fixed table 1, and the central shaft detection head 3 is arranged above the angle detection head 2; the angle detection head is composed of a supporting seat 201, a pushing block 202, a pushing block electric cylinder 203 and a pressure sensor 204, the top end face of the supporting seat 201 is arranged in an inclined shape, sliding rails are symmetrically arranged on the top end face of the supporting seat 201, the pushing block 202 is movably mounted on the sliding rails, and the sliding rails are used for limiting the displacement of the pushing block 202, so that the pushing block 202 can only move along the sliding rails and cannot deviate relative to the sliding rails in the moving process, and the acting force directions of the pushing block 202 on the workpiece 6 in the process of pushing the workpiece 6 are consistent; the pushing block 202 is U-shaped to prevent the workpiece 6 and the pushing block 202 from sliding relative to each other when the pushing block 202 pushes the workpiece 6, so that the workpiece 6 is not separated from the pushing block 202; a pushing block electric cylinder 203 (Lindelloe 50-200-L10-P-T750W-T3-FB type) is arranged on a supporting seat 201 between the sliding rails, a pressure sensor 204 (CAS SBA200gf type) is arranged between the end of a piston rod of the pushing block electric cylinder 203 and the pushing block 202, the pressure sensor 204 is fixedly connected with the end of the piston rod of the pushing block electric cylinder 203 and the pushing block 202 respectively, and the pushing block electric cylinder 203 can drive the pushing block 202 to move through the pressure sensor 204.
The central shaft detection head is composed of a mounting seat 301, a rotating motor 302, a motor moving electric cylinder 303, a detection clamping jaw 304 and a connecting sleeve 305, the top end face of the mounting seat 301 is in a slope-shaped arrangement, a sliding rail is arranged on the top end face of the mounting seat 301, the rotating motor 302 is movably mounted on the sliding rail, and the rotating motor 302 is a servo motor; a motor moving electric cylinder 303 (Lingde LOE50-200-L10-P-T750W-T3-FB type) is arranged on the mounting seat 301 on one side of the rotating motor 302, a piston rod of the motor moving electric cylinder 303 is fixedly connected with the rotating motor 302, and the motor moving electric cylinder 303 drives the rotating motor 302 to move along a sliding rail; the other side of the rotating motor 302 is provided with a detection clamping jaw 304, the rotating motor 302 is provided with a pulling pressure sensor 306, the pulling pressure sensor 306 is movably provided with the detection clamping jaw 304 through an air cylinder, and the detection clamping jaw 304 is fixedly connected with the rotating motor 302 through the pulling pressure sensor 306; a connecting sleeve 305 is arranged between the detection clamping jaws 304, an output shaft of the rotating motor 302 passes through the tension pressure sensor 306 and extends to a position between the detection clamping jaws 304, a torque sensor 307 (a torque detector of CYB-806S \ B (0 to +/-10 N.m) S1A1D1J1 model produced by Weister Zhongguang) is arranged between the end of the output shaft of the rotating motor 302 extending to the position between the detection clamping jaws 304 and the connecting sleeve 305, and the connecting sleeve 305 is fixedly connected with the output shaft of the rotating motor 302 passing through the tension pressure sensor 306 (CAS SBA200gf model) through the torque sensor 307.
When the central shaft of the steering column detection machine platform and the column detection device are assembled, the central shaft is fixedly arranged on the steering column detection machine platform; the steering column detects the board by frame, clamping fixed station 1, angle detection head 2 and central axis detection head 3 constitute, and the frame is the frame body, is provided with clamping fixed establishment 1 in the frame, is provided with angle detection head 2 in the frame of clamping fixed station 1 one side, is provided with central axis detection head 3 in the frame of angle detection head 2 top.
A control cabinet 4 (produced by BECKHOFF, a C640 type industrial control computer) is arranged on one side of the rack, a display screen 5 is arranged on the rack between the control cabinet 4 and the central shaft detection head, and the display screen 5 is connected with the control cabinet 4; the pressure sensor 204, the pull pressure sensor 306 and the torque sensor 307 are respectively electrically connected with the control cabinet 4, the pressure sensor 204, the pull pressure sensor 306 and the torque sensor 307 respectively upload signals to the control cabinet 4, and the control cabinet 4 respectively uploads the processed signals to the display screen 5 after processing the signals and displays the processed signals on the display screen 5; the pushing block electric cylinder 203, the rotating motor 302 and the motor moving electric cylinder 303 are respectively electrically connected with the control cabinet 4, and the pushing block electric cylinder 203, the rotating motor 302 and the motor moving electric cylinder 303 are respectively controlled by the control cabinet 4.
When the central shaft of the steering column detection machine platform and the column detection device work, a workpiece 6 is placed on the clamping and fixing platform 1 of the steering column operation performance detection device, and the workpiece 6 is clamped and fixed;
after the workpiece 6 is clamped on the clamping fixing table 1, the bottom end of the central shaft of the workpiece 6 is fixed through a wrench, and after the bottom end of the central shaft of the workpiece 6 is fixed, a floating adapter 7 is installed at one end of the central shaft of the workpiece 6 and connected with a steering wheel through the wrench, so that the detection clamping jaw 304 and the connecting sleeve 305 are respectively connected with the central shaft of the workpiece 6 through the floating adapter 7;
after the floating adapter 7 is installed, the control cabinet 4 starts the motor to move the electric cylinder 303, so that the motor moves the electric cylinder 303 to drive the rotating motor 302, the detection clamping jaw 304 and the connecting sleeve 305 to move downwards to a distance, set by the control cabinet 4, of the detection clamping jaw 304, and the detection clamping jaw 304 is connected with the upper end of the floating adapter 7 on the central shaft of the workpiece 6; after the detection clamping jaw 304 descends to the right position, the control cabinet 4 controls the detection clamping jaw 304 to act, so that the detection clamping jaw 304 clamps the floating adapter 7;
after the floating adapter 7 is clamped by the detection clamping jaw 304, the control cabinet 4 controls the motor to move the electric cylinder 303 to drive the floating adapter 7 to move upwards to the control cabinet 4 through the rotating motor 302, the pulling pressure sensor 306 and the detection clamping jaw 304 in sequence, so that the detection clamping jaw 304 drives the central shaft of the workpiece 6 to move upwards along the axial direction through the floating adapter 7, and in the process that the central shaft of the workpiece 6 moves upwards along the axial direction, the pulling pressure sensor 306 detects the pulling force between the central shaft of the workpiece 6 and the detection clamping jaw 304, and detects the resistance of the central shaft of the workpiece 6 when moving upwards; after the motor moves the electric cylinder 303 to drive the central shaft of the workpiece 6 to move upwards to the control cabinet 4 for a set distance, the control cabinet 4 controls the motor to move the electric cylinder 303 to drive the central shaft of the workpiece 6 to move downwards, the pull pressure sensor 306 detects the resistance of the central shaft of the workpiece 6 during the downward movement of the central shaft of the workpiece 6 along the axial direction, and the telescopic adjusting force of the central shaft of the workpiece 6 is detected by detecting the resistance of the central shaft of the workpiece 6 during the upward movement and the downward movement; the pulling pressure sensor 306 uploads a detection signal to the control cabinet 4 in the detection process, the control cabinet 4 processes the signal uploaded by the pulling pressure sensor 306 and then transmits the processed signal to the display screen 5, the processed signal is displayed on the display screen 5 in a data table and curve mode, and meanwhile, the control cabinet 4 synchronously displays a central shaft telescopic adjustment force standard data table and curve on the display screen 5;
after the detection data and the curve of the central shaft telescopic adjustment force of the workpiece 6 are displayed on the display screen 5, the detection data and the curve of the central shaft telescopic adjustment force of the workpiece 6 and the standard data and the curve of the central shaft telescopic adjustment force are evaluated: when the detection data and the curve of the central shaft telescopic adjusting force of the workpiece 6 are between the standard data and the curve of the central shaft telescopic adjusting force, the central shaft telescopic adjusting force of the workpiece 6 is evaluated to be qualified; when the detection data and the curve part of the central shaft telescopic adjusting force of the workpiece 6 exceed or completely exceed the central shaft telescopic adjusting force standard data and the curve, the central shaft telescopic adjusting force of the workpiece 6 is evaluated to be unqualified;
after the telescopic adjusting force of the central shaft of the workpiece 6 is evaluated, the steering gear pipe column is locked through the handle of the workpiece 6 so as to avoid the central shaft from shaking; after the steering gear column is locked, the control cabinet 4 controls the detection clamping jaw 304 to reset, and controls the rotating motor 302 to rotate anticlockwise for 1 circle at the rotating speed set by the control cabinet 4, and after the anticlockwise rotation for 1 circle is completed, the control cabinet 4 controls the rotating motor 302 to rotate clockwise for 1 circle at the rotating speed set by the control cabinet 4; in the process that the rotating motor 302 rotates anticlockwise for 1 circle and clockwise for 1 circle, the rotating motor 302 drives the connecting sleeve 305 to rotate through the torque sensor 307, so that the connecting sleeve 305 drives the central shaft of the workpiece 6 to rotate anticlockwise for 1 circle and clockwise for 1 circle through the floating adapter 7; the torque sensor 307 detects the rotation resistance of the central shaft of the workpiece 6 in the processes of rotating the central shaft of the workpiece 6 counterclockwise by 1 turn and rotating the central shaft of the workpiece clockwise by 1 turn, that is, detects the no-load moment of the central shaft of the workpiece 6; the torque sensor 307 uploads a detection signal to the control cabinet 4 in the detection process, the control cabinet 4 processes the signal uploaded by the torque sensor 307 and then transmits the processed signal to the display screen 5, the processed signal is displayed on the display screen 5 in a data table and curve mode, and meanwhile, the control cabinet 4 synchronously displays a central shaft no-load moment standard data table and curve on the display screen 5;
after the detection data and the curve of the no-load moment of the central shaft of the workpiece 6 are displayed on the display screen 5, the detection data and the curve of the rotation of the central shaft of the workpiece 6 and the standard data and the curve of the no-load moment of the central shaft are evaluated: when the detection data and the curve of the no-load moment of the central shaft of the workpiece 6 are between the standard data and the curve of the no-load moment of the central shaft, the no-load moment of the central shaft of the workpiece 6 is evaluated to be qualified; when the detection data and the curve part of the no-load moment of the central shaft of the workpiece 6 exceed or completely exceed the standard data and the curve of the no-load moment of the central shaft, the no-load moment of the central shaft of the workpiece 6 is evaluated to be unqualified;
after the no-load moment of the central shaft of the workpiece 6 is evaluated, the steering tube column is loosened through the handle; after the tube column of the steering gear is loosened, the control cabinet 4 controls the motor to move the electric cylinder 303 to reset, so that the floating adapter 7 on the workpiece 6 is separated from the connecting sleeve 305; after the floating adapter 7 is separated from the connecting sleeve 305, the control cabinet 4 controls the electric cylinder 203 of the pushing block to drive the pushing block 202 to move upwards through the pressure sensor 204, so that the central shaft of the workpiece 6 is gradually inserted between the pushing blocks 202, the central shaft of the workpiece 6 is gradually inserted into the pushing block 202, then the pushing block 202 continues to move upwards, the pushing block 202 pushes the central shaft of the workpiece 6 to drive the pipe column to rotate relative to the bottom plate, and the pressure sensor 204 detects the rotation resistance of the pipe column of the workpiece 6 in the process that the pipe column of the workpiece 6 rotates relative to the bottom plate; the pressure sensor 204 uploads a detection signal to the control cabinet 4 in the detection process, when the control cabinet 4 detects that the rotation resistance of the tubular column is increased rapidly through the pressure sensor 204, the tubular column cannot rotate relative to the bottom plate, in the process, the pushing block electric cylinder 203 uploads stroke data to the control cabinet 4, the control cabinet 4 calculates the rotation angle of the tubular column relative to the bottom plate through the stroke of the pushing block electric cylinder 203, and the rotation angle of the tubular column is detected, namely the adjustable angle of the tubular column is detected; when the rotation resistance of the pipe column exceeds a set value, the control cabinet 4 controls the electric cylinder 203 of the pushing block to gradually reset, so that the pushing block 202 resets; in the resetting process of the pushing block 202, the pipe column resets under the elastic force action of the resetting spring of the workpiece 6; after the pressure sensor 204 and the electric cylinder 203 of the pushing block upload data to the control cabinet 4, the control cabinet 4 processes the data, displays the data and the curve of the rotation angle and the rotation resistance of the pipe column on the display screen 5, and synchronously displays the standard data and the curve of the rotation angle and the rotation resistance of the pipe column;
after the detection data and the curve of the rotation resistance and the rotation angle of the 6 pipe columns of the workpiece are displayed on the display screen 5, the detection data and the curve of the rotation resistance and the rotation angle of the 6 pipe columns of the workpiece are evaluated with the standard data and the curve of the rotation resistance and the rotation angle of the pipe columns: when the detection data and the curve of the rotation resistance and the rotation angle of the workpiece 6 pipe column are between the standard data and the curve of the rotation resistance and the rotation angle of the pipe column, the rotation resistance and the rotation angle of the workpiece 6 pipe column are evaluated to be qualified; when the detection data and the curve part of the pipe column rotation resistance and the rotation angle of the workpiece 6 exceed or completely exceed the standard data and the curve of the pipe column rotation resistance and the rotation angle, evaluating that the pipe column rotation resistance and the rotation angle of the workpiece 6 are unqualified;
after the pipe column is reset, the pipe column is locked through a handle of the workpiece 6, so that the pipe column can not rotate relative to the bottom plate; after the pipe column is locked, the control cabinet 4 starts the pushing block electric cylinder 203, so that the pushing block electric cylinder 17 drives the pushing block 202 to move upwards, in the process of moving upwards of the pushing block 202, the pushing block 202 applies an upward force to the pipe column of the workpiece 6, in the process, the pressure sensor 204 detects the reaction force of the central shaft to the pushing block 202, namely, the holding force of the handle to the pipe column; the electric cylinder 203 of the pushing block uploads stroke data to the control cabinet 4, the control cabinet 4 calculates the gap between the central shaft and the pipe column through the stroke of the pushing block 202, namely, the gap between the central shaft and the pipe column is detected, meanwhile, the displacement of the pipe column relative to the handle is detected, the control cabinet 4 processes the data and displays the curve of the handle holding force and the gap between the central shaft and the pipe column on the display screen 5, and simultaneously synchronously displays the standard curve of the holding force and the gap;
after the detection curves of the handle holding force of the workpiece 6 and the gap between the central shaft and the pipe column are displayed on the display screen 5, the detection curves of the handle holding force of the workpiece 6 and the standard curve of the handle holding force are evaluated, and the detection curves of the gap between the central shaft and the pipe column and the standard curve of the gap between the central shaft and the pipe column are evaluated: when the detection curve of the handle holding force of the workpiece 6 is between the standard curves of the handle holding force, the handle holding force of the workpiece 6 is evaluated to be qualified; when the part of the detection curve of the handle holding force of the workpiece 6 exceeds or completely exceeds the standard curve of the handle holding force, the handle holding force of the workpiece 6 is evaluated to be unqualified; when the detection curve of the gap between the central shaft of the workpiece 6 and the pipe column is between the standard curves of the gaps between the central shaft and the pipe column, the gap between the central shaft of the workpiece 6 and the pipe column is evaluated to be qualified; when the part of the detection curve of the gap between the central shaft of the workpiece 6 and the pipe column exceeds or completely exceeds the standard curve of the gap between the central shaft and the pipe column, the gap between the central shaft of the workpiece 6 and the pipe column is evaluated to be unqualified;
after the handle holding power of the workpiece 6 is detected, the control cabinet 4 resets the pushing block electric cylinder 203, and after the pushing block electric cylinder 203 is reset, the workpiece 6 is taken down from the clamping fixing table 1.
The central shaft and the pipe column detection device of the steering pipe column detection machine table can conveniently clamp and fix a workpiece through the clamping and fixing table in the detection process, can detect the rotation angle and the rotation resistance of a workpiece pipe column and the holding force of a handle through the angle detection head, can detect the telescopic adjustment force and the no-load moment of the central shaft of the workpiece through the central shaft detection head, can visually observe and compare detection parameters, and further can parametrically and accurately detect the quality of the workpiece; the problems that the existing detection device is inaccurate in detection result, large in labor intensity and low in working efficiency, and the detection process cannot be parameterized are solved, and the device is particularly suitable for detecting the central shaft and the pipe column of the steering pipe column.
Claims (4)
1. A central shaft of a steering column detection machine and a column detection device are composed of a clamping fixed platform (1), an angle detection head (2) and a central shaft detection head (3), wherein the angle detection head (2) is arranged on one side of the clamping fixed platform (1), and the central shaft detection head (3) is arranged above the angle detection head (2); the method is characterized in that: the angle detection head (2) is composed of a supporting seat (201), a pushing block (202), an electric pushing block cylinder (203) and a pressure sensor (204), wherein the pushing block (202) is installed on the top end face of the supporting seat (201) through symmetrically arranged sliding rails; a pushing block electric cylinder (203) is arranged on a supporting seat (201) between the sliding rails, and a piston rod of the pushing block electric cylinder (203) is fixedly connected with a pushing block (202) through a pressure sensor (204).
2. The central shaft and column detection device of a steering column detection machine according to claim 1, wherein: the top end face of the supporting seat (201) is arranged in an inclined shape.
3. The central shaft and column detection device of a steering column detection machine according to claim 1, wherein: the central shaft detection head (3) is composed of a mounting seat (301), a rotating motor (302), a motor moving electric cylinder (303), a detection clamping jaw (304) and a connecting sleeve (305), the rotating motor (302) is movably mounted on the top end face of the mounting seat (301) through a sliding rail, the motor moving electric cylinder (303) is arranged on the mounting seat (301) on one side of the rotating motor (302), and a piston rod of the motor moving electric cylinder (303) is fixedly connected with the rotating motor (302); a detection clamping jaw (304) is arranged on the other side of the rotating motor (302), and the detection clamping jaw (304) is fixedly connected with the rotating motor (302) through a pulling pressure sensor (306); a connecting sleeve (305) is arranged between the detection clamping jaws (304), and the connecting sleeve (305) is fixedly connected with an output shaft of a rotating motor (302) penetrating through a tension and pressure sensor (306) through a torque sensor (307).
4. The central shaft and column detection device of a steering column detection machine according to claim 3, wherein: the top end face of the mounting seat (301) is in a slope shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021313802.5U CN212109965U (en) | 2020-07-07 | 2020-07-07 | Central shaft of steering column detection machine and column detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021313802.5U CN212109965U (en) | 2020-07-07 | 2020-07-07 | Central shaft of steering column detection machine and column detection device |
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| Publication Number | Publication Date |
|---|---|
| CN212109965U true CN212109965U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021313802.5U Active CN212109965U (en) | 2020-07-07 | 2020-07-07 | Central shaft of steering column detection machine and column detection device |
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| Country | Link |
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| CN (1) | CN212109965U (en) |
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- 2020-07-07 CN CN202021313802.5U patent/CN212109965U/en active Active
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