CN211042716U - Automobile pedal system testing device - Google Patents
Automobile pedal system testing device Download PDFInfo
- Publication number
- CN211042716U CN211042716U CN201921899617.6U CN201921899617U CN211042716U CN 211042716 U CN211042716 U CN 211042716U CN 201921899617 U CN201921899617 U CN 201921899617U CN 211042716 U CN211042716 U CN 211042716U
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- pedal
- force sensor
- guide rail
- fixing
- vertical plate
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 230000033001 locomotion Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Abstract
The utility model discloses an automobile pedal system testing device, which comprises a workbench, wherein a force sensor fixing frame for fixing a force sensor and a pedal fixing frame for fixing a pedal are arranged on the workbench; the force sensor fixing frame is provided with a transmission assembly and a guide rail which is rotatably connected with the pedal base, the guide rail is connected with the transmission assembly, one end, far away from the pedal base, of the guide rail is provided with the force sensor, the transmission assembly drives the force sensor to rotate through the guide rail, so that the force sensor is in contact with the pedal arm and is perpendicular to the pedal arm. The utility model discloses, set up force sensor mount and footboard mount on the workstation, transmission assembly passes through the guide rail and takes power sensor to rotate along with the removal of footboard arm, makes force sensor all the time with the footboard arm contact, and perpendicular to footboard arm, avoids leading to force sensor and footboard arm to take place the angular deflection because of the removal of footboard arm, improves the degree of accuracy that detects the power value of footboard arm.
Description
Technical Field
The utility model relates to the field of automotive technology, especially, relate to an automobile pedal system testing arrangement.
Background
The automobile pedal system is an important control system of a vehicle and a part which is easy and direct to perceive by a customer, and comprises a clutch, a brake, an accelerator and a foot brake, and in order to ensure that the performance of the automobile pedal system meets the requirements of the customer, the automobile pedal system needs to be subjected to related performance tests.
The existing automobile pedal system testing device has the following defects:
1) the force sensors are fixed on the load fixture, and the angle of the load changes along with the movement of the pedal in the loading process, so that the accuracy of the measured force value is poor;
2) the displacement sensors are fixed on the load jig and are not directly connected with the pedal, and the arrangement mode and the measurement by the displacement sensors cannot accurately show the stroke state of the pedal due to arc motion in the motion process of the pedal;
3) the clutch body and the flywheel are adopted for fixation, each vehicle needs to prepare corresponding parts, and when the parts have vertical deviation, the clutch needs to be replaced, so that the universality is poor;
4) the clutch and the flywheel are fixed on the jig in a mode of being perpendicular to the jig, and the actual vehicle is horizontally arranged and is easily influenced by the action of gravity, so that the accuracy of a detection force value is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a car footboard system testing arrangement improves the degree of accuracy of the power value that detects the pedal arm.
The technical scheme of the utility model provides an automobile pedal system testing device, which comprises a workbench, wherein a force sensor fixing frame for fixing a force sensor and a pedal fixing frame for fixing a pedal are arranged on the workbench;
the force sensor fixing frame is provided with a transmission assembly and a guide rail which is rotatably connected with the pedal base, the guide rail is connected with the transmission assembly, one end, far away from the pedal base, of the guide rail is provided with the force sensor, the transmission assembly drives the force sensor to rotate through the guide rail, so that the force sensor is in contact with the pedal arm and is perpendicular to the pedal arm.
Further, the transmission assembly comprises a motor, a connecting rod connected with the motor and a sliding block connected with the connecting rod, the sliding block is sleeved on the guide rail, and the motor is connected with the sliding block and the guide rail in a sliding mode through the connecting rod.
Furthermore, the opposite sides of the guide rail are provided with limiting blocks for limiting the sliding block.
Furthermore, one end of the guide rail is connected with a fixing component hinged with the pedal base.
Further, the fixing component comprises a first vertical plate, a second vertical plate, a transverse plate and an adjusting bolt shaft, one end of the first vertical plate and one end of the second vertical plate are connected with the transverse plate,
the other end of the first vertical plate is provided with a base through hole, and the angle sensor base penetrates through the base through hole to be connected with the pedal base;
the other end of the second vertical plate is provided with a threaded hole, and one end of the adjusting bolt shaft penetrates through the threaded hole to be connected with the pedal base;
the other end of the adjusting bolt shaft is provided with a handle, and one end of the guide rail is rotatably connected with the adjusting bolt shaft through a bearing.
Furthermore, the other end of the guide rail is connected with a force sensor connecting plate, and the force sensor is arranged on one side, facing the pedal arm, of the force sensor connecting plate.
Further, the force sensor fixing frame further comprises a first bottom plate and a third vertical plate which are perpendicular to each other, the first bottom plate is connected with the workbench, a motor connecting plate is connected to the third vertical plate, and the motor is fixed to the motor connecting plate.
Further, the pedal device also comprises an angle detection device which is arranged on the pedal base and is used for detecting the rotation angle of the pedal arm;
the angle detection device comprises an angle sensor base arranged on the pedal base, an angle sensor rotating shaft connected with the angle sensor base in a rotating mode, a fixing cap connected with the angle sensor rotating shaft in a coaxial rotating mode and a linkage rod connected with the fixing cap, wherein an angle sensor is arranged on the angle sensor rotating shaft, and one end of the fixing cap, far away from the linkage rod, is connected with the pedal arm.
Furthermore, a release bearing fixing frame used for fixing the release bearing and a clutch fixing frame used for fixing the clutch are further arranged on the workbench, and the release bearing fixing frame and the clutch fixing frame enable the release bearing and the clutch to be arranged along the horizontal direction of the workbench.
Further, the pedal fixing frame comprises a second bottom plate and a fourth vertical plate which are perpendicular to each other, the second bottom plate is connected with the workbench, and a first through hole used for fixing the clutch master cylinder in the horizontal direction of the workbench is formed in the fourth vertical plate;
the release bearing fixing frame comprises a third bottom plate and a fifth vertical plate which are perpendicular to each other, the third bottom plate is connected with the workbench, and a second through hole for fixing the clutch cylinder in the horizontal direction of the workbench is formed in the fifth vertical plate;
the clutch mount includes mutually perpendicular's fourth bottom plate and sixth riser, the fourth bottom plate with the workstation is connected, the sixth riser makes the clutch is followed the horizontal direction of workstation arranges.
After adopting above-mentioned technical scheme, have following beneficial effect: through set up force sensor mount and footboard mount on the workstation, transmission assembly passes through the guide rail and takes power sensor to rotate along with the removal of footboard arm, makes force sensor and footboard arm contact all the time, and perpendicular to footboard arm, avoids leading to force sensor and footboard arm to take place the angular deflection because of the removal of footboard arm, improves the degree of accuracy that detects the power value of footboard arm.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
fig. 1 is a schematic structural diagram of an automotive pedal system testing device according to an embodiment of the present invention;
fig. 2 is a sectional view of the angle detecting device and the pedal base shown in fig. 1.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an automotive pedal system testing apparatus provided in an embodiment of the present invention, including a workbench 10, a force sensor fixing frame 20 for fixing a force sensor 21 and a pedal fixing frame 30 for fixing a pedal are provided on the workbench 10;
the force sensor fixing frame 20 is provided with a transmission assembly and a guide rail 22 which is rotatably connected with the pedal base 31, the guide rail 22 is connected with the transmission assembly, one end of the guide rail 22, which is far away from the pedal base 31, is provided with a force sensor 21, and the transmission assembly drives the force sensor 21 to rotate through the guide rail 22, so that the force sensor 21 is in contact with the pedal arm 32 and is perpendicular to the pedal arm 32.
The utility model provides a car pedal system testing arrangement mainly comprises workstation 10, force sensor mount 20, footboard mount 30 and angle adjustment mechanism.
The force sensor fixing frame 20 and the pedal fixing frame 30 are arranged on the workbench 10 at intervals, and the distance between the force sensor fixing frame 20 and the pedal fixing frame 30 is more than or equal to the sum of the lengths of the pedal base 31 and the pedal arm 32 in the horizontal direction.
The guide rail 22 is connected with the transmission assembly, one end of the guide rail 22, which is far away from the pedal base 31, is connected with the force sensor 21, when the pedal is tested, the pedal arm 32 moves from an initial position to a full stroke position, the transmission assembly pushes the guide rail 22 to rotate around the pedal base 31 along with the movement of the pedal arm 31, so that the force sensor 21 is in contact with the pedal arm 32 and is always perpendicular to the pedal arm 32, the phenomenon that the force sensor 21 and the pedal arm 32 are subjected to angular deviation due to the movement of the pedal arm 32 is avoided, and the accuracy of the force value of the pedal arm 32 detected by the force sensor 21 is improved.
The utility model provides a car pedal system testing arrangement, through set up force sensor mount and footboard mount on the workstation, transmission assembly passes through the guide rail and takes power sensor to rotate along with the removal of footboard arm, makes force sensor contact with the footboard arm all the time, and perpendicular to footboard arm, avoids leading to force sensor and footboard arm to take place the angular deviation because of the removal of footboard arm, improves the degree of accuracy that detects the power value of footboard arm.
Optionally, as shown in fig. 1, the transmission assembly includes a motor 23, a connecting rod 24 connected to the motor 23, and a slider 25 connected to the connecting rod 24, the slider 25 is sleeved on the guide rail 22, and the motor 23 is slidably connected to the guide rail 22 through the connecting rod 24 and the slider 25.
The guide rail 22 is in a strip shape, the slider 25 is sleeved on the guide rail 22, the motor 23 drives the slider 25 to slide along the length direction of the guide rail 22 through the connecting rod 24, so that the force sensor 21 is always kept in contact with the pedal arm 32 along with the movement of the pedal arm 32 and is perpendicular to the pedal arm 32, the phenomenon that the force sensor 21 and the pedal arm 32 are subjected to angular deviation due to the movement of the pedal arm 32 is avoided, and the accuracy of detecting the force value of the pedal arm 32 by the force sensor 21 is improved.
The motor 23 may also be a cylinder, a telescopic cylinder, etc., as long as it can drive the slider 25 to slide along the length direction of the guide rail 22.
Optionally, as shown in fig. 1, the opposite sides of the guide rail 22 are provided with limit blocks 221 for limiting the slide 25.
The limiting blocks 221 are respectively arranged on two opposite sides of the length direction of the guide rail 22 and used for limiting the sliding block 25 and preventing the sliding block 25 from deviating in the using process.
Alternatively, as shown in fig. 1, a fixing member 33 hinged to the pedal base 31 is connected to one end of the guide rail 22.
The fixing component 33 is used for fixing the guide rail 22 on the pedal base 31 and preventing the guide rail 22 from deviating in the using process.
Optionally, as shown in fig. 2, the fixing component 33 includes a first vertical plate 331, a second vertical plate 332, a transverse plate 333, and an adjusting bolt shaft 334, one end of the first vertical plate 331 and one end of the second vertical plate 332 are connected to the transverse plate 333, the other end of the first vertical plate 331 is provided with a base through hole, the angle sensor base 41 passes through the base through hole and is connected to the pedal base 31, the other end of the second vertical plate 332 is provided with a threaded hole, one end of the adjusting bolt shaft 334 passes through the threaded hole and is connected to the pedal base 31, the other end of the adjusting bolt shaft 334 is provided with a handle 3341, and one end of the guide rail 22 is rotatably connected to the.
The guide rail 22 rotates around the adjusting bolt shaft 334, and is limited by the first vertical plate 331, the second vertical plate 332 and the transverse plate 333, the use deviation is prevented, the handle 3341 is used for adjusting the position of the guide rail 22 on the adjusting bolt shaft 334, during installation, one end of the adjusting bolt shaft 334 sequentially penetrates through a threaded hole and a bearing on the second vertical plate 332 to be connected with the pedal base 31, then the rotating handle 3341 drives the adjusting bolt shaft 334 to rotate, the distance between the adjusting guide rail 22 and the pedal base 31 is adjusted, and the guide rail 22 is convenient to install.
Preferably, the first and second risers 331 and 332 and the lateral plate 333 are integrally formed to improve connection stability.
Alternatively, as shown in fig. 1, the other end of the guide rail 22 is connected to a force sensor attachment plate 222, and the force sensor 21 is disposed on the side of the force sensor attachment plate 222 toward the pedal arm 32.
The force sensor connecting plate 222 comprises a fixed end and a free end which are oppositely arranged, the fixed end of the force sensor connecting plate 222 is fixedly connected with the other end of the guide rail 22, the free end of the force sensor connecting plate 222, facing to the pedal arm 32, is connected with the force sensor 21 through a bolt, and the force sensor 21 is conveniently installed through the force sensor connecting plate 222.
Optionally, as shown in fig. 1, the force sensor fixing frame 20 further includes a first bottom plate 24 and a third vertical plate 25 perpendicular to each other, the first bottom plate 24 is connected to the workbench 10, the third vertical plate 25 is connected to a motor connecting plate 26, and the motor 23 is fixed to the motor connecting plate 26.
Preferably, the first bottom plate 24 and the third riser 25 are integrally formed for improved connection stability.
Alternatively, as shown in fig. 2, an angle detecting means 40 provided on the pedal base 31 for detecting the rotation angle of the pedal arm 32;
the angle detecting device 40 includes an angle sensor base 41 disposed on the pedal base 31, an angle sensor rotating shaft 42 rotatably connected to the angle sensor base 41, a fixing cap 43 rotatably connected to the angle sensor rotating shaft 42 coaxially, and a linkage 44 connected to the fixing cap 43, wherein an angle sensor is disposed on the angle sensor rotating shaft 42, and one end of the linkage 44 away from the fixing cap 43 is connected to the pedal arm 32.
The angle sensor base 41 is fixed to one side of the pedal base 31, and the angle sensor base 41 is provided with an angle sensor for detecting a rotation angle of the angle sensor rotation shaft 42. The fixing cap 43 is coaxially rotatably connected to the angle sensor rotary shaft 42 by a fixing bolt, and the fixing cap 43 covers the angle sensor base 41 and the angle sensor rotary shaft 42. One end of the linkage rod 44 is connected with the fixing cap 43, the other end of the linkage rod 44 is fixedly connected with the pedal arm 32, the pedal arm 32 is connected with the pedal base 32 through a pedal arm rotating pin 321, and the pedal arm 32 can rotate around the pedal arm rotating pin 321. During testing, the linkage rod 44 and the fixing cap 43 are driven to rotate by the movement of the pedal arm 32, the angle sensor rotating shaft 43 is driven to rotate by the rotation of the fixing cap 43, the angle sensor detects the rotating angle of the angle sensor rotating shaft 42 in real time, and displacement of the pedal arm 32 can be calculated according to the rotating angle detected by the angle sensor, so that the stroke state of the pedal arm 32 can be judged more accurately, and the measuring accuracy is improved. It should be noted that, the displacement of the pedal arm 32 can be calculated according to the rotation angle detected by the angle sensor, which belongs to the prior art and is not described herein again.
Alternatively, as shown in fig. 1, a release bearing holder 50 for fixing the release bearing 51 and a clutch holder 60 for fixing the clutch 61 are further provided on the table 10, and the release bearing holder 50 and the clutch holder 60 arrange the release bearing 51 and the clutch 61 in the horizontal direction of the table 10.
The force sensor holder 20, the pedal holder 30, the release bearing holder 50, and the clutch holder 60 are disposed on the table 10 at intervals, and the intervals therebetween only need to satisfy the sizes of the corresponding components.
Alternatively, as shown in fig. 1, the pedal fixing bracket 30 includes a second bottom plate 34 and a fourth vertical plate 35 perpendicular to each other, the second bottom plate 34 is connected to the working platform 10, and the fourth vertical plate 35 is provided with a first through hole for fixing the clutch master cylinder 52 in the horizontal direction of the working platform 10;
the release bearing fixing frame 50 comprises a third bottom plate 53 and a fifth vertical plate 54 which are perpendicular to each other, the third bottom plate 53 is connected with the workbench 10, and the fifth vertical plate 54 is provided with a second through hole for fixing the clutch cylinder 55 along the horizontal direction of the workbench 10;
the clutch mount 60 includes a fourth base plate 62 and a sixth riser 63 perpendicular to each other, the fourth base plate 62 being connected to the table 10, the sixth riser 63 having the clutch 61 arranged in a horizontal direction of the table 10.
During testing, one end of the clutch main cylinder 52 passes through the first through hole to be connected with the pedal arm 32, the other end of the clutch main cylinder 52 is communicated with the clutch sub cylinder 55 through the oil pipe 56, and the clutch sub cylinder 55 is fixed in the second through hole, so that the arrangement of the release bearing and the clutch along the horizontal direction of the workbench 10 is convenient to realize.
Preferably, the second bottom plate 34 and the fourth riser 35 are integrally formed for improved connection stability.
Preferably, the third bottom plate 53 and the fifth riser plate 54 are integrally formed for improved connection stability.
Preferably, the fourth bottom plate 62 and the sixth riser 63 are integrally formed for improved connection stability.
To sum up, the utility model provides a car footboard system testing arrangement, through set up force sensor mount and footboard mount on the workstation, transmission assembly passes through the guide rail and takes power sensor to rotate along with the removal of footboard arm, makes force sensor contact with the footboard arm all the time, and perpendicular to footboard arm, avoids leading to force sensor and footboard arm to take place the angular migration because of the removal of footboard arm, improves the degree of accuracy that detects the power value of footboard arm. Meanwhile, the accuracy of judging the stroke state of the pedal arm is improved by arranging the angle detection device for detecting the rotation angle of the pedal arm on the pedal base. And the release bearing and the clutch are arranged along the horizontal direction of the workbench through the release bearing fixing frame and the clutch fixing frame, so that parts do not need to be replaced for many times, the universality is improved, the release bearing and the clutch are enabled to accord with the arrangement direction in the actual vehicle, the influence on the accuracy of the force value of the pedal arm detected by the force sensor due to the action of gravity is avoided, and the accuracy of the force value of the pedal arm is further improved.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (9)
1. The testing device for the automobile pedal system is characterized by comprising a workbench, wherein a force sensor fixing frame for fixing a force sensor and a pedal fixing frame for fixing a pedal are arranged on the workbench;
the force sensor fixing frame is provided with a transmission assembly and a guide rail which is rotatably connected with the pedal base, the guide rail is connected with the transmission assembly, one end, far away from the pedal base, of the guide rail is provided with the force sensor, the transmission assembly drives the force sensor to rotate through the guide rail, so that the force sensor is in contact with the pedal arm and is perpendicular to the pedal arm.
2. The automotive pedal system testing device of claim 1, wherein the transmission assembly comprises a motor, a connecting rod connected with the motor and a sliding block connected with the connecting rod, the sliding block is sleeved on the guide rail, and the motor is slidably connected with the guide rail through the connecting rod and the sliding block.
3. The automotive pedal system test device of claim 2, wherein the opposite sides of the guide rail are provided with limit blocks for limiting the slide block.
4. The automotive pedal system test device of claim 2 wherein a fixing member hinged to the pedal base is attached to one end of the guide rail.
5. The automotive pedal system testing device of claim 4, wherein the fixing assembly includes a first vertical plate, a second vertical plate, a cross plate, and a trim bolt shaft, one end of the first vertical plate and the second vertical plate being connected to the cross plate,
the other end of the first vertical plate is provided with a base through hole, and an angle sensor base penetrates through the base through hole to be connected with the pedal base;
the other end of the second vertical plate is provided with a threaded hole, and one end of the adjusting bolt shaft penetrates through the threaded hole to be connected with the pedal base;
the other end of the adjusting bolt shaft is provided with a handle, and one end of the guide rail is rotatably connected with the adjusting bolt shaft through a bearing.
6. The automotive pedal system testing device of claim 2, wherein the other end of the guide rail is connected with a force sensor connecting plate, and the force sensor is arranged on one side of the force sensor connecting plate, which faces the pedal arm.
7. The testing device of claim 2, wherein the force sensor holder further comprises a first bottom plate and a third vertical plate perpendicular to each other, the first bottom plate is connected to the worktable, and the third vertical plate is connected to a motor connecting plate, and the motor is fixed to the motor connecting plate.
8. The automotive pedal system test device according to any one of claims 1 to 7, wherein a release bearing holder for fixing a release bearing and a clutch holder for fixing a clutch are further provided on the table, the release bearing holder and the clutch holder arranging the release bearing and the clutch in a horizontal direction of the table.
9. The automotive pedal system test device of claim 8,
the pedal fixing frame comprises a second bottom plate and a fourth vertical plate which are perpendicular to each other, the second bottom plate is connected with the workbench, and a first through hole for fixing the clutch master cylinder in the horizontal direction of the workbench is formed in the fourth vertical plate;
the release bearing fixing frame comprises a third bottom plate and a fifth vertical plate which are perpendicular to each other, the third bottom plate is connected with the workbench, and a second through hole for fixing the clutch cylinder in the horizontal direction of the workbench is formed in the fifth vertical plate;
the clutch mount includes mutually perpendicular's fourth bottom plate and sixth riser, the fourth bottom plate with the workstation is connected, the sixth riser makes the clutch is followed the horizontal direction of workstation arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921899617.6U CN211042716U (en) | 2019-11-05 | 2019-11-05 | Automobile pedal system testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921899617.6U CN211042716U (en) | 2019-11-05 | 2019-11-05 | Automobile pedal system testing device |
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| Publication Number | Publication Date |
|---|---|
| CN211042716U true CN211042716U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921899617.6U Expired - Fee Related CN211042716U (en) | 2019-11-05 | 2019-11-05 | Automobile pedal system testing device |
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| CN (1) | CN211042716U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115265435A (en) * | 2022-06-17 | 2022-11-01 | 智己汽车科技有限公司 | Measuring device and measuring method for pedal stroke |
-
2019
- 2019-11-05 CN CN201921899617.6U patent/CN211042716U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115265435A (en) * | 2022-06-17 | 2022-11-01 | 智己汽车科技有限公司 | Measuring device and measuring method for pedal stroke |
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| CF01 | Termination of patent right due to non-payment of annual fee |