CN216206088U - Dynamic measuring device for camber angle of wheel - Google Patents
Dynamic measuring device for camber angle of wheel Download PDFInfo
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- CN216206088U CN216206088U CN202122603723.9U CN202122603723U CN216206088U CN 216206088 U CN216206088 U CN 216206088U CN 202122603723 U CN202122603723 U CN 202122603723U CN 216206088 U CN216206088 U CN 216206088U
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Abstract
The utility model relates to the technical field of automobiles, in particular to a dynamic measuring device for a camber angle of a wheel. Wherein the bearing mounting bracket is connected to the outside of the wheel. The fixed bearing comprises a fixed bearing rotor and a fixed bearing stator which are rotatably connected, and the fixed bearing rotor is fixedly connected to the bearing mounting bracket. The sensor mounting bracket is fixedly connected to the fixed bearing stator, and the length direction of the sensor mounting bracket is parallel to the axial direction of the wheel. The laser displacement sensors are used for measuring the distance between the laser displacement sensors and the ground, the laser beams of each laser displacement sensor are located in the vertical plane, and the at least two laser displacement sensors are arranged on the sensor mounting support in parallel at intervals. The dynamic measuring device for the camber angle of the wheel can dynamically measure the camber angle of the wheel in real time when an automobile runs, is not easily influenced by the environment, and the laser displacement sensor can guarantee the measuring precision.
Description
Technical Field
The utility model relates to the technical field of automobiles, in particular to a dynamic measuring device for camber angles of wheels.
Background
The stress condition of the automobile tire has important influence on the automobile motion performance, the force acting on the wheel comprises camber reaction force, and the camber angle needs to be measured when the camber reaction force is researched. The camber angle of the wheel refers to the angle between the plane where the wheel is located and the vertical plane when the wheel is installed and the end surface of the wheel is inclined outwards. The existing dynamic measurement method for camber angle of wheel includes the following steps:
1. the measuring method based on the wheel positioning instrument is widely used, but the method is mainly used for detecting on a rack and cannot detect the road of a real vehicle.
2. A measuring method based on visual calibration of the outer side of a tire mainly comprises the steps of obtaining a tire image with a characteristic mark by utilizing a camera with well-calibrated internal and external parameters, and obtaining the camber angle of a wheel by utilizing a two-dimensional coordinate and a spatial three-dimensional coordinate of a characteristic point. Although the method realizes non-contact measurement, calibration is still complicated, and the method is mostly realized on a rack and has low practicability.
CN201310442691 proposes a real-time wheel camber angle measuring method in the driving process of an automobile. The method comprises the steps that a detection disc is fixedly arranged on the outer side of a rim through a connecting piece, a projection profile arc line of the upper half peripheral edge of the detection disc is obtained through shooting, and a functional relation between the chord length of a line and the camber angle of a wheel is obtained through calibration, so that the camber angle corresponding to any chord length in the running process of a vehicle is obtained in real time. However, in the method, images need to be acquired by means of camera equipment, and the information acquisition equipment is complex; the projection contour is used as information input, image processing is complicated, and the projection contour is easily influenced by environmental conditions.
CN101813466A proposes an apparatus and method for measuring the camber angle of a vehicle wheel, the method being: the system is started from an initial position and reaches a balance position for the first time to acquire an initial wheel camber angle. If the camber angle changes and the laser receiver acquires the change of the laser beam drop point position, the system program calculates the drop point distance. The program determines the steering and stepping angles of the motor according to the evaluation rules, and then changes the angle of the laser receiver. And the system program returns to the monitoring of the change of the landing point of the laser beam to carry out calculation and judgment again until the laser receiver is judged to be parallel to the tire, and the program of the laser receiver is adjusted to be terminated to obtain the camber angle which is reached again by the tire. The method has high requirement on equipment precision, needs a system program to adjust the testing device in real time, has certain time delay and is not strong in real time.
CN102012206A proposes a dynamic measuring device for automobile toe angle and camber angle and a measuring method thereof. The device comprises a plurality of dial indicators, a fixed support, a moving support and a steel plate, wherein the steel plate is provided with distance scales and is fixedly connected to a hub. The method comprises the steps of placing a vehicle on a two-column or four-column lifting machine, removing a tire, sleeving a steel plate on a wheel hub, changing the height of the vehicle body relative to a suspension by slowly lifting or descending the vehicle body to simulate the bouncing of the wheel, measuring the displacement of a dial indicator when a moving support is located at each balance position, and recording the measurement result each time. The method can not carry out real-time measurement when the automobile runs, and the measurement precision is low.
Therefore, a dynamic camber angle measuring device is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dynamic measuring device for camber angles of wheels, which can dynamically measure the camber angles of the wheels in real time when an automobile runs, is not easily influenced by the environment and has high measuring precision.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a dynamic wheel camber angle measurement device, comprising:
the bearing mounting bracket is connected to the outer side of the wheel;
the fixed bearing comprises a fixed bearing rotor and a fixed bearing stator which are rotatably connected, and the fixed bearing rotor is fixedly connected with the bearing mounting bracket;
the sensor mounting bracket is fixedly connected to the fixed bearing stator, and the length direction of the sensor mounting bracket is parallel to the axial direction of the wheel;
the device comprises at least two laser displacement sensors, a sensor mounting bracket and a control module, wherein the at least two laser displacement sensors are used for measuring the distance between the sensor mounting bracket and the ground, the laser beams of each laser displacement sensor are positioned in a vertical plane, and the at least two laser displacement sensors are arranged on the sensor mounting bracket in parallel at intervals.
Optionally, the sensor mounting bracket comprises at least two sensor mounting brackets, each sensor mounting bracket is used for connecting one laser displacement sensor to the sensor mounting bracket.
Optionally, the sensor mount is configured such that a measurement direction of the laser displacement sensor is perpendicular to the sensor mounting bracket.
Optionally, the vehicle body further comprises a bearing fixing support, one end of the bearing fixing support is connected to the vehicle body, the other end of the bearing fixing support is connected to the fixed bearing stator, and the bearing fixing support is an elastic piece.
Optionally, the other end of the bearing fixing support is provided with a fixing ring, and the fixing ring is sleeved on the fixing bearing stator.
Optionally, still include the sucking disc, the sucking disc sets up the one end of bearing fixed bolster, the sucking disc can adsorb on the automobile body.
Optionally, the sensor mounting bracket has a length direction that coincides with an axial direction of the wheel.
Optionally, the bearing mounting bracket and the fixed bearing are both arranged coaxially with the wheel.
Optionally, the precision of the laser displacement sensor is less than or equal to 0.03 mm, and the measuring range is greater than or equal to 1 m.
Optionally, the sampling frequency of the laser displacement sensor is greater than or equal to 1000 hz.
The utility model has the beneficial effects that:
the utility model provides a dynamic measuring device for a camber angle of a wheel, which comprises a bearing mounting bracket, a fixed bearing, a sensor mounting bracket and at least two laser displacement sensors. Wherein the bearing mounting bracket is connected to the outside of the wheel. The fixed bearing comprises a fixed bearing rotor and a fixed bearing stator which are rotatably connected, and the fixed bearing rotor is fixedly connected to the bearing mounting bracket. The sensor mounting bracket is fixedly connected to the fixed bearing stator, and the length direction of the sensor mounting bracket is parallel to the axial direction of the wheel. The laser displacement sensors are used for measuring the distance between the laser displacement sensors and the ground, the laser beams of each laser displacement sensor are located in the vertical plane, and the at least two laser displacement sensors are arranged on the sensor mounting support in parallel at intervals.
It can be known that the wheel can drive bearing mounting bracket and fixed bearing rotor rotation and slope, and fixed bearing stator and sensor mounting bracket are along with the fixed bearing rotor slope but do not rotate. Because the length direction of the sensor mounting bracket is parallel to the axial direction of the wheel, the included angle between the sensor mounting bracket and the projection on the horizontal plane is equal to the included angle between the radial plane and the vertical plane of the wheel. At least two laser displacement sensors are arranged on the sensor mounting bracket at intervals in parallel, so that an included angle between the sensor mounting bracket and the projection of the sensor mounting bracket on the horizontal plane at each moment can be obtained. In particular, the distance between at least two laser displacement sensors is known, each laser displacement sensor being capable of measuring the distance between the laser displacement sensor and the ground in real time. When the wheels incline, the sensor mounting bracket inclines accordingly, and the included angle between the laser beam of each laser displacement sensor and the projection of the laser beam on the ground changes accordingly. The difference value of the measured values of two laser displacement sensors is matched with the setting distance of the two laser displacement sensors on the sensor mounting bracket and the included angle between the laser beam of each laser displacement sensor and the length direction of the sensor mounting bracket, so that the camber angle of the wheel can be calculated. The laser displacement sensor can measure in real time, and the values of the other two parameters are unchanged in the advancing process of the automobile, so that the real-time numerical value of the camber angle of the wheel can be obtained. Therefore, the dynamic measuring device for the camber angle of the wheel can dynamically measure the camber angle of the wheel in real time when an automobile runs, is not easily influenced by the environment, and the laser displacement sensor can ensure the measuring precision.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic wheel camber angle measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a calculation principle of a dynamic camber angle measuring apparatus according to an embodiment of the present invention;
FIG. 3 is a measurement of a first laser displacement sensor provided by an embodiment of the present invention;
FIG. 4 is a measurement of a second laser displacement sensor provided by embodiments of the present invention;
fig. 5 is a result of calculation of the camber angle of the wheel provided by the embodiment of the present invention.
In the figure:
1. a bearing mounting bracket; 2. a wheel; 3. fixing the bearing rotor; 4. fixing the bearing stator; 5. a sensor mounting bracket; 6. a first laser displacement sensor; 7. a second laser displacement sensor; 8. a first sensor mount; 9. a second sensor mount; 10. a vehicle body; 11. and a bearing fixing bracket.
Detailed Description
The technical scheme of the utility model is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The stress condition of the automobile tire has important influence on the automobile motion performance, the force acting on the wheel 2 comprises camber reaction force, and the camber angle needs to be measured when the camber reaction force is researched. The camber angle of the wheel is the angle between the plane of the wheel 2 and the vertical plane when the wheel 2 is installed. The existing dynamic measurement method for the camber angle of the wheel has the problems of poor practical performance, complex system, measurement lag, incapability of being suitable for the advancing state of a vehicle and the like. Accordingly, the present embodiment provides a dynamic wheel camber angle measuring device to solve the above problems.
As shown in fig. 1, the dynamic wheel camber angle measuring apparatus includes a bearing mounting bracket 1, a stationary bearing, a sensor mounting bracket 5, and at least two laser displacement sensors. Wherein the bearing mounting bracket 1 is attached to the outside of the wheel 2. The fixed bearing comprises a fixed bearing rotor 3 and a fixed bearing stator 4 which are rotatably connected, and the fixed bearing rotor 3 is fixedly connected with the bearing mounting bracket 1. The sensor mounting bracket 5 is fixedly connected to the fixed bearing stator 4, and the length direction of the sensor mounting bracket 5 is parallel to the axial direction of the wheel 2. The laser displacement sensors are used for measuring the distance between the laser displacement sensors and the ground, the laser beams of each laser displacement sensor are located in the vertical plane, and the at least two laser displacement sensors are arranged on the sensor mounting bracket 5 in parallel at intervals.
To facilitate the assembly of the laser displacement sensor, the dynamic wheel camber angle measuring device optionally further comprises at least two sensor mounts, each sensor mount being adapted to attach one laser displacement sensor to the sensor mounting bracket 5. Optionally, in this embodiment, two laser displacement sensors are provided, which are the first laser displacement sensor 6 and the second laser displacement sensor 7 respectively. Correspondingly, a first sensor fixing part 8 and a second sensor fixing part 9 are arranged on the sensor mounting bracket 5, the first sensor fixing part 8 is used for connecting the first laser displacement sensor 6, and the second sensor fixing part 9 is used for connecting the second laser displacement sensor 7.
In order to facilitate the calculation of the camber angle of the wheel, the angle between the measuring direction of the laser displacement sensor and the sensor mounting bracket 5 is not considered in the calculation process, and optionally, the measuring direction of the laser displacement sensor is perpendicular to the sensor mounting bracket 5. Alternatively, the longitudinal direction of the sensor mount is arranged perpendicular to the sensor mounting bracket 5, and the measuring direction of the laser displacement sensor is arranged parallel to the longitudinal direction of the sensor mount. Optionally, one end of the sensor fixing piece is connected to the sensor mounting bracket 5, the laser displacement sensor is fixed on the side wall of the sensor fixing piece, and the measuring direction of the laser displacement sensor is made to be parallel to the length direction of the sensor fixing piece, so that the measuring direction of the laser displacement sensor can be perpendicular to the sensor mounting bracket 5.
When the dynamic measurement device for the camber angle of the wheel loosens, the laser displacement sensor may contact the ground, causing damage. Particularly, when the dynamic measuring device for the camber angle of the wheel loosens in the advancing process of the automobile, the laser displacement sensor is inevitably seriously abraded. Therefore, optionally, the dynamic wheel camber angle measuring device further comprises a bearing fixing bracket 11, one end of the bearing fixing bracket 11 is connected to the vehicle body 10, the other end of the bearing fixing bracket 11 is connected to the fixed bearing stator 4, and the bearing fixing bracket 11 is an elastic member. It is known that when the wheel 2 is tilted, the fixed bearing stator 4 is vertically moved relative to the vehicle body 10. The bearing fixing bracket 11 is elastically deformed accordingly. And when the dynamic measuring device of the camber angle of the wheel is loosened, the fixed bearing stator 4 is caused to move greatly relative to the vehicle body 10 and exceeds the moving range caused by the inclination of the wheel 2, the deformation amount of the bearing fixing support 11 also exceeds the normal range, and at the moment, the bearing fixing support 11 can generate a limiting acting force on the fixed bearing stator 4 to ensure that the fixed bearing stator does not move further, so that the laser displacement sensor is protected.
Optionally, one end of the bearing fixing bracket 11, which is connected to the fixed bearing stator 4, is provided with a fixing ring, and the fixing ring is sleeved on the fixed bearing stator 4. The structure is favorable for simplifying the assembling process of the bearing fixing bracket 11 and the fixed bearing stator 4, and is favorable for disassembly and maintenance.
Optionally, the dynamic measurement device for the camber angle of the wheel further includes a suction cup, the suction cup is disposed at one end of the bearing fixing bracket 11, and the suction cup can be adsorbed on the vehicle body 10 to realize the detachable connection between the bearing fixing bracket 11 and the vehicle body 10.
Since the longitudinal direction of the sensor-mounting bracket 5 is parallel to the axial direction of the wheel 2, there is a case where the longitudinal direction of the sensor-mounting bracket 5 is not coincident with but parallel to the axial direction of the wheel 2. Under the scheme, the sensor mounting bracket 5 can move up and down relative to the vehicle body 10 along with the rolling of the wheel 2, so that the bending and the vibration of the sensor mounting bracket 5 are easily caused, and the accuracy of the measurement result is not facilitated. To avoid this, optionally, the longitudinal direction of the sensor mounting bracket 5 coincides with the axial direction of the wheel 2.
In order to realize the coincidence of the length direction of the sensor mounting bracket 5 and the axial direction of the wheel 2, optionally, the bearing mounting bracket 1 and the fixed bearing are both arranged coaxially with the wheel 2, and the sensor mounting bracket 5 and the fixed bearing are arranged coaxially.
In order to ensure the measurement accuracy of the laser displacement sensor, the present embodiment optionally employs a laser displacement sensor with an accuracy of less than or equal to 0.03 mm. In order to ensure that the range of the laser displacement sensor is sufficient to adapt to the wheels 2 with various sizes, optionally, the laser displacement sensor with the range of 1 meter or more is adopted in the embodiment. In order to realize real-time measurement of the laser displacement sensor, optionally, the embodiment employs a laser displacement sensor with a sampling frequency of greater than or equal to 1000 hz.
It is known that the wheel 2 can drive the bearing mounting bracket 1 and the fixed bearing rotor 3 to rotate and tilt, and the fixed bearing stator 4 and the sensor mounting bracket 5 tilt but do not rotate with the fixed bearing rotor 3. As shown in fig. 2, since the length direction of the sensor mounting bracket 5 is parallel to the axial direction of the wheel 2, the included angle between the sensor mounting bracket 5 and the projection thereof on the horizontal plane is equal to the included angle between the radial plane of the wheel 2 and the vertical plane. At least two laser displacement sensors are arranged on the sensor mounting bracket 5 at intervals in parallel, so that an included angle between the sensor mounting bracket 5 and the projection of the sensor mounting bracket on the horizontal plane at each moment can be obtained.
In particular, the distance between at least two laser displacement sensors is known, each laser displacement sensor being capable of measuring the distance between the laser displacement sensor and the ground in real time. When the wheel 2 inclines, the sensor mounting bracket 5 inclines accordingly, and the included angle between the laser beam of each laser displacement sensor and the projection of the laser beam on the ground also changes accordingly. The camber angle of the wheel can be calculated by the difference value of the measured values of two laser displacement sensors and the arrangement distance of the two laser displacement sensors on the sensor mounting bracket 5 and the included angle between the laser beam of each laser displacement sensor and the length direction of the sensor mounting bracket 5.
The laser displacement sensor can measure in real time, and the values of the other two parameters are unchanged in the advancing process of the automobile, so that the real-time numerical value of the camber angle of the wheel can be obtained. To simplify the calculation process, the laser displacement sensor may be arranged such that the measuring direction of its laser beam is perpendicular to the sensor mounting bracket 5.
Setting the distance between the two laser displacement sensors on the sensor mounting bracket 5 to be L, the measurement value of one laser displacement sensor to be d1, and the measurement value of the other laser displacement sensor to be d2, the calculation formula of the wheel camber angle α is arctan (| d1-d2 |/L).
The above calculation can be performed using the relevant parameters of any two laser displacement sensors, and the error caused by the bending of the sensor mounting bracket 5 can be eliminated according to the results of a plurality of wheel camber angles while the wheel camber angle is calculated.
Fig. 3 to 5 respectively show the measurement result of the first laser displacement sensor 6, the measurement result of the second laser displacement sensor 7 and the result of the calculated camber angle during the running of the vehicle. The dynamic measuring device of the camber angle of the wheel can dynamically measure the camber angle of the wheel in real time when the automobile runs, is not easily influenced by the environment, and the laser displacement sensor can ensure the measuring precision.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A dynamic wheel camber angle measuring device, comprising:
the bearing mounting bracket (1), the bearing mounting bracket (1) is connected to the outer side of the wheel (2);
the fixed bearing comprises a fixed bearing rotor (3) and a fixed bearing stator (4) which are rotatably connected, and the fixed bearing rotor (3) is fixedly connected to the bearing mounting bracket (1);
the sensor mounting bracket (5) is fixedly connected to the fixed bearing stator (4), and the length direction of the sensor mounting bracket (5) is parallel to the axial direction of the wheel (2);
the device comprises at least two laser displacement sensors, a sensor mounting bracket (5) and a control system, wherein the at least two laser displacement sensors are used for measuring the distance between the sensor mounting bracket (5) and the ground, the laser beams of each laser displacement sensor are positioned in a vertical plane, and the at least two laser displacement sensors are arranged on the sensor mounting bracket (5) in parallel at intervals.
2. The dynamic wheel camber angle measuring device according to claim 1, further comprising at least two sensor mounts, each sensor mount for coupling one of the laser displacement sensors to the sensor mounting bracket (5).
3. The dynamic wheel camber angle measuring device according to claim 2, wherein the sensor mount is configured such that a measurement direction of the laser displacement sensor is perpendicular to the sensor mounting bracket (5).
4. The dynamic wheel camber angle measurement device according to claim 1, further comprising a bearing fixing bracket (11), wherein one end of the bearing fixing bracket (11) is connected to the vehicle body (10), and the other end is connected to the stationary bearing stator (4), and the bearing fixing bracket (11) is an elastic member.
5. The dynamic wheel camber angle measurement device according to claim 4, characterized in that the other end of the bearing fixing bracket (11) is provided with a fixing ring, which is fitted over the fixed bearing stator (4).
6. The dynamic wheel camber angle measurement device according to claim 4, further comprising a suction cup disposed at one end of the bearing fixing bracket (11), the suction cup being capable of being sucked on a vehicle body (10).
7. The dynamic wheel camber angle measuring device according to claim 1, characterized in that the longitudinal direction of the sensor-mounting bracket (5) coincides with the axial direction of the wheel (2).
8. The dynamic wheel camber angle measurement device according to claim 1, characterized in that the bearing mounting bracket (1) and the fixed bearing are both arranged coaxially with the wheel (2).
9. The dynamic wheel camber angle measurement device of claim 1, wherein the laser displacement sensor has a precision of 0.03 mm or less and a range of 1 m or more.
10. The dynamic wheel camber angle measurement device according to claim 1, wherein a sampling frequency of the laser displacement sensor is 1000 hz or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122603723.9U CN216206088U (en) | 2021-10-28 | 2021-10-28 | Dynamic measuring device for camber angle of wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122603723.9U CN216206088U (en) | 2021-10-28 | 2021-10-28 | Dynamic measuring device for camber angle of wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216206088U true CN216206088U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122603723.9U Active CN216206088U (en) | 2021-10-28 | 2021-10-28 | Dynamic measuring device for camber angle of wheel |
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| Country | Link |
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| CN (1) | CN216206088U (en) |
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2021
- 2021-10-28 CN CN202122603723.9U patent/CN216206088U/en active Active
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