Air spring for monitoring height change of vehicle body
By placing the sensor in the air spring gas chamber and utilizing the cushioning and isolation of the spring, the sensor is susceptible to jitter and environmental impact, and the precise adjustment and safety and reliability of vehicle height monitoring are achieved, extending the service life of the sensor and reducing maintenance costs.
Patent Information
- Application Number
- CN202422062556.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The sensors of the existing vehicle height adjustment system are easily affected by jitter and the environment due to exposed installation, resulting in low monitoring accuracy and easy damage, affecting the vehicle's driving stability and safety.
The sensor is placed in the gas chamber of the air spring, and the impact of jitter is reduced by the buffering and isolation of the spring, and the wire is protected by the sealing structure to ensure monitoring accuracy and reliability of signal transmission.
It improves the monitoring accuracy of air spring height changes, ensures the timeliness and stability of vehicle height adjustment, extends sensor life, and saves installation space and maintenance costs.
Smart Images
Figure CN223049295U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle air springs, and particularly relates to an air spring for monitoring the change of vehicle body height. Background Art
[0002] An air spring is a shock-absorbing device installed between a vehicle chassis and a wheel bracket. It mainly achieves the effects of buffering and shock absorption by compressing air, thereby improving the comfort and stability of the vehicle. Since the suspension height from the ground is different under different load states of the vehicle, in order to ensure the stable driving performance of the vehicle and guarantee driving safety, the vehicle is equipped with a vehicle body height adjustment system.
[0003] The existing vehicle body height adjustment system includes a sensor that is externally installed on the vehicle suspension to monitor the change of the vehicle chassis height in real time. One end of the sensor is directly connected to the vehicle chassis, and the other end is directly connected to the wheel bracket; it also includes a controller and a solenoid valve installed at the air spring inflation port. The above-mentioned sensor and solenoid valve are respectively electrically connected to the controller; the solenoid valve is used to control the inflation and deflation of the air spring. When the vehicle is running, the above-mentioned sensor transmits the signal of the change in the vehicle chassis height it monitors to the controller. After receiving and judging the signal of the change in the vehicle chassis height, the controller sends a signal to the solenoid valve to control the opening and closing of the solenoid valve. The solenoid valve changes the inflation amount of the air spring by controlling the inflation and deflation of the air spring to realize the height adjustment of the air spring, and the air spring drives the vehicle chassis height to be synchronously adjusted to a safe height.
[0004] Although the existing vehicle height adjustment system can complete the adjustment of the vehicle body height, the timeliness and reliability of the regulation need to be improved. Since both ends of the sensor for monitoring the change of the vehicle chassis height are directly connected to the vehicle chassis and the wheel bracket, when the vehicle is running on a rough road surface, the vehicle chassis and the wheel bracket swing relatively violently due to the influence of the road conditions, which will cause the two ends of the sensor to shake violently. At this time, the sensed value of the sensor is not the true displacement value in the height direction between the vehicle chassis and the wheel bracket, but a comprehensive displacement value including its shaking amplitude value, with a large deviation; the sensor for monitoring the change of the vehicle chassis height is directly externally installed on the vehicle suspension, and its monitoring accuracy is bound to be affected by external environments such as sediment, rain, wind, temperature, and air pressure, which is more obvious in rainy and snowy weather, and even the sensor may be damaged in a harsh environment. The above situations all affect the accuracy of the sensor monitoring data. These inaccurate or incorrect detection signals transmitted to the controller will cause the controller to misjudge the change of the vehicle chassis height, resulting in the solenoid valve not adjusting the air spring height in time or even misadjusting the air spring height, ultimately leading to untimely adjustment or even failure of the vehicle chassis height adjustment, posing a hidden danger to driving safety. In addition, the externally installed sensor not only increases the installation space of the suspension, but is also more vulnerable to external environments, accelerating damage, requiring more frequent maintenance and replacement, having a shorter service life, and increasing the vehicle maintenance cost. Summary of the Invention
[0005] The technical problem to be solved by the present utility model is to provide an air spring for monitoring the change of vehicle body height, improve the stability and monitoring accuracy of vehicle sensors, and ensure the driving stability and safety reliability of the vehicle.
[0006] The technical solution adopted by the present utility model to solve the above technical problem is: an air spring for monitoring the change of vehicle body height, comprising a mounting seat, a bladder and a piston. One end of the bladder is hermetically connected to the mounting seat, and the other end of the bladder is hermetically connected to the piston. The mounting seat, the bladder and the piston enclose a sealed gas chamber.
[0007] A sensor for monitoring the axial relative displacement between the mounting seat and the piston is provided in the gas chamber. One end of the sensor is connected to the mounting seat, and the other end of the sensor is connected to the piston.
[0008] Further, a wire passing hole is provided on the mounting seat or the piston. The wire connected to the sensor passes through the wire passing hole and is hermetically connected to the hole wall of the wire passing hole.
[0009] Further, the sensor is a height sensor or an angle sensor, and the sensor is fixedly installed on the piston. A first connecting rod and a second connecting rod are provided in the gas chamber. One end of the first connecting rod is rotatably connected to the mounting seat, the other end of the first connecting rod is rotatably connected to the second connecting rod, and the end of the second connecting rod away from the first connecting rod is fixedly connected to the signal turntable of the height sensor or the angle sensor. The rotation axes of the first connecting rod, the second connecting rod and the signal turntable are arranged in the same direction.
[0010] Further, the wire passing hole is provided on the piston.
[0011] Further, one end of the first connecting rod is rotatably connected to the piston, and the sensor is fixedly installed on the mounting seat.
[0012] Further, the wire passing hole is provided on the mounting seat.
[0013] Further, an elastic sleeve is provided in the wire passing hole. The outer wall of the elastic sleeve is hermetically connected to the hole wall of the wire passing hole, and the wire is located inside the elastic sleeve and hermetically connected to the inner wall of the elastic sleeve.
[0014] Further, a sealant layer is provided between the wire passing hole and the elastic sleeve, and between the elastic sleeve and the wire.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: An air spring for monitoring the change in vehicle body height is provided. In the present utility model, the sensor is arranged in the gas cavity, and the change in the height of the vehicle chassis is monitored in real time by monitoring the change in the height of the air spring. Relying on the buffering and isolation effects of the spring itself, the vehicle vibration and the influence of the external environment on the monitoring accuracy of the sensor are reduced, the monitoring accuracy of the change value of the air spring height is improved, the height of the air spring and the height of the vehicle suspension are adjusted timely and accurately, the stability and reliability of the vehicle height adjustment system are improved, and driving safety is ensured. The external installation space of the air spring is saved, the service life of the sensor is extended, and the maintenance cost is saved. By arranging the wire passing hole at the end where the sensor is fixedly installed, the safety of the sensor line is ensured, and the service life of the sensor is extended; by arranging an elastic sleeve between the wire and the wire passing hole, the wire and the wire passing hole are hermetically connected, and the airtightness of the gas cavity is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic cross-sectional structure view of an embodiment of the present utility model;
[0017] Figure 2 is a schematic cross-sectional structure view of another embodiment of the present utility model;
[0018] Figure 3 is Figure 1 an enlarged schematic structure view of part A in
[0019] Figure 4 is a schematic structure view of the present utility model during use;
[0020] Reference numerals: 1 - mounting seat; 2 - bladder; 3 - piston; 31 - wire passing hole; 32 - elastic sleeve; 4 - gas cavity; 5 - sensor; 51 - wire; 52 - first connecting rod; 53 - second connecting rod; 54 - fixed connecting rod; 6 - controller; 7 - air storage tank; 8 - solenoid valve; 91 - suspension; 92 - wheel bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0022] As shown in the Figures 1-4 drawings, an air spring for monitoring the change in vehicle body height includes a mounting seat 1, a bladder 2 and a piston 3. One end of the bladder 2 is hermetically connected to the mounting seat 1, and the other end of the bladder 2 is hermetically connected to the piston 3. The mounting seat 1, the bladder 2 and the piston 3 enclose a sealed gas cavity 4; a sensor 5 for monitoring the axial relative displacement amount between the mounting seat 1 and the piston 3 is arranged in the gas cavity 4. One end of the sensor 5 is connected to the mounting seat 1, and the other end of the sensor 5 is connected to the piston 3.
[0023] The upper end of the air spring is connected to the suspension 91, and the lower end of the air spring is connected to the wheel support. The axial directions of the mounting seat 1 and the piston 3 are the vehicle height direction. Therefore, the change amount of the axial displacement of the mounting seat 1 and the piston 3 is equal to the change value of the height of the air spring. The sensor 5 monitors the change value of the height of the air spring in real time. The controller 6 is generally a vehicle computer arranged outside the gas chamber 4 of the air spring. The sensor 5 is electrically connected to the controller 6. The gas chamber 4 of the air spring is generally connected to the gas storage tank 7 through the air passage of the electromagnetic valve 8. When the height of the vehicle suspension 91 changes relative to the wheel support 92, it will drive the height of the air spring to change synchronously. The sensor 5 in the air spring transmits the monitored height change data of the air spring to the controller 6. After analyzing and processing the data, the controller 6 issues an instruction to the electromagnetic valve 8 to control the opening and closing of the electromagnetic valve 8. The electromagnetic valve 8 controls the communication state between the gas storage tank 7 and the gas chamber 4 of the air spring to inflate or exhaust the air spring, and then controls the height of the air spring by controlling the inflation amount of the air spring. The upper end of the air spring drives the suspension 91 to move synchronously to complete the height adjustment of the suspension 91.
[0024] In the present utility model, the sensor 5 is arranged in the gas chamber 4 of the air spring to monitor the height change of the vehicle suspension. By relying on the buffering effect of the air spring itself, the jitter amplitude of the sensor 5 is reduced. By relying on the isolation effect of the air spring, the influence of the external environment on the monitoring accuracy of the sensor 5 is reduced, the monitoring accuracy of the height change value of the air spring is improved, and it is ensured that the controller 6 makes timely and accurate judgments after receiving the signal of the sensor 5. Then, the electromagnetic valve is controlled to adjust the inflation amount of the air spring in a timely and accurate manner, and the height adjustment of the air spring and the height of the vehicle suspension 91 are completed, improving the stability and reliability of the vehicle height adjustment system and ensuring driving safety. In addition, the present utility model can also save the external installation space of the air spring, extend the service life of the sensor 5, and save maintenance costs.
[0025] When the present utility model is in use, the mounting seat 1 can be connected to the suspension 91, and the piston 3 can be connected to the wheel support 92. Or the piston 3 can be connected to the suspension 91, and the mounting seat 1 can be connected to the wheel support 92. The mounting seat 1 can be a columnar structure or a cylindrical structure with one end closed. The bladder 2 is generally a rubber tube, and it can be hermetically connected to the mounting seat 1 and the piston 3 by means of hoop connection, press connection, etc. The piston 3 can be a hollow cylindrical structure or a solid columnar structure. The sensor 5 can adopt a height sensor, a displacement sensor or an angle sensor, or other types of sensors to monitor the height change of the air spring. Signal turntables are rotatably connected to both the height sensor and the angle sensor. The sensor 5 can be fixedly installed on the piston 3 or the mounting seat 1. When the sensor 5 is a height sensor or an angle sensor, the specific installation structure is as follows:
[0026] Embodiment 1. AsFigure 1 As shown, the sensor 5 is fixedly mounted on the piston 3; a first connecting rod 52 and a second connecting rod 53 are provided in the gas chamber 4, one end of the first connecting rod 52 is rotatably connected to the mounting seat 1, the other end of the first connecting rod 52 is rotatably connected to the second connecting rod 53, and one end of the second connecting rod 53 away from the first connecting rod 52 is fixedly connected to the signal turntable of the height sensor or the angle sensor; the rotating shaft of the first connecting rod 52, the rotating shaft of the second connecting rod 53 and the rotating shaft of the signal turntable are arranged in the same direction.
[0027] Embodiment 2: Figure 2 As shown, the sensor 5 is fixedly mounted on the mounting base 1; a first connecting rod 52 and a second connecting rod 53 are provided in the gas chamber 4, one end of the first connecting rod 52 is rotatably connected to the piston 3, the other end of the first connecting rod 52 is rotatably connected to the second connecting rod 53, and one end of the second connecting rod 53 away from the first connecting rod 52 is rotatably connected to the signal turntable of the sensor 5; the rotating shaft of the first connecting rod 52, the rotating shaft of the second connecting rod 53 and the rotating shaft of the signal turntable are arranged in the same direction.
[0028] In the above-mentioned embodiments 1 and 2, changes in the vehicle suspension height will cause relative displacement of the mounting seat 1 and the piston 3 on the air spring. Under the action of the mounting seat 1 and the piston 3, the first connecting rod 52 and the second connecting rod 53 rotate relative to each other and convert the relative displacement of the mounting seat 1 and the piston 3 into rotation of the second connecting rod 53 relative to the sensor 5. The sensor 5 converts the rotation angle of the second connecting rod 53 into the relative displacement of the mounting seat 1 and the piston 3 and transmits it to the controller.
[0029] In the above-mentioned first embodiment, the sensor 5 can be directly fixedly mounted on the piston 3 by bonding, bolting, etc., or can be transferred to the piston 3 by other adapters, and the adapters here can be fixed connecting rods 54, which can be threadedly connected to the piston 3, or can be connected to the piston 3 by bolts and clamps. Similarly, the sensor 5 in the second embodiment can be directly fixedly mounted on the mounting base 1 by bonding, bolting, etc., or can be transferred to the mounting base 1 by fixing connecting rods 54.
[0030] The sensor 5 and the controller 6 need to be connected by wires to ensure that the sensor 5 transmits the monitored data to the controller 6 safely and reliably. Specifically, a wire passing hole 31 is provided on the mounting seat 1 or the piston 3, and the wire 51 connected to the sensor 5 is led out through the wire passing hole 31 and is hermetically connected to the hole wall of the wire passing hole 31. In the above embodiment, the wire passing hole 31 can be provided at one end of the air spring where the first connecting rod 52 is installed. When the height of the air spring changes, it will drive the relative rotation of the first connecting rod 52 and the second connecting rod 53, and at the same time, it will also cause the change of the distance between the sensor 5 and the wire outlet hole 31. Therefore, the wire 51 in the gas cavity 4 needs to be set long enough. When the height of the air spring changes, the wire 51 bends and moves with the rotation of the connecting rod, which will not only affect the accuracy of the sensor 5, but also the first connecting rod 52 and the second connecting rod 53 in motion are likely to interfere with the wire 51, resulting in wear or breakage of the wire 51. Preferably, when the sensor 5 is fixedly installed on the piston 3, the wire passing hole 31 is provided on the piston 3; when the sensor 5 is fixedly installed on the mounting seat 1, the wire passing hole 31 is provided on the piston 3. This can avoid the interference between the first connecting rod 52, the second connecting rod 53 and the wire 51, further improve the monitoring accuracy of the sensor 5, ensure the line safety of the sensor 5, and extend the service life of the sensor 5.
[0031] The wire passing hole 31 is used to accommodate the wire 51 and lead it out, and the outer wall of the wire 51 can be directly and tightly connected to the hole wall of the wire passing hole 31. In actual installation, the mounting seat 1 and the piston 3 are generally made of metal. The rubber outer skin of the wire 51 has insufficient elasticity, and it is not easy to ensure the hermetic connection between the wire passing hole 31 and the wire 51, and the wire skin of the wire 51 is easily damaged during installation. Preferably, an elastic sleeve 32 is provided in the wire passing hole 31. The outer wall of the elastic sleeve 32 is hermetically connected to the hole wall of the wire passing hole 31, and the wire 51 is located in the elastic sleeve 32 and is hermetically connected to the inner wall of the elastic sleeve 32, which can easily ensure the hermetic installation between the wire passing hole 31 and the wire 51, and then ensure the airtightness of the gas cavity 4 and avoid wear of the wire 51. The elastic sleeve 32 can be made of elastic sealing materials such as rubber and pearl cotton. As a further preference, a sealant layer is provided between the wire passing hole 31 and the elastic sleeve 32, and between the elastic sleeve 32 and the wire 51. After the elastic sleeve 32, the wire 51 and the wire passing hole 31 are installed, sealant is filled between the wire hole 31 and the elastic sleeve 32, and between the elastic sleeve 32 and the wire 51 to further ensure the airtightness of the gas cavity and the quality of the air spring.
[0032] The above are the specific implementation manners of the present utility model, which are intended to explain the present utility model and shall not be construed as a limitation to the present utility model. In the description of the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore shall not be construed as a limitation to the present utility model.
Claims
1. An air spring for monitoring vehicle height changes, comprising a mounting seat (1), a bladder skin (2) and a piston (3), wherein one end of the bladder skin (2) is sealedly connected to the mounting seat (1), and the other end of the bladder skin (2) is sealedly connected to the piston (3), and the mounting seat (1), the bladder skin (2) and the piston (3) form a sealed gas chamber (4); characterized in that: A sensor (5) for monitoring the axial relative displacement between the mounting seat (1) and the piston (3) is provided in the gas chamber (4); one end of the sensor (5) is connected to the mounting seat (1), and the other end of the sensor (5) is connected to the piston (3).
2. The air spring for monitoring vehicle height change according to claim 1, characterized in that: The mounting seat (1) or the piston (3) is provided with a wire hole (31), and a wire (51) connected to the sensor (5) is led out through the wire hole (31) and is sealedly connected to the hole wall of the wire hole (31).
3. The air spring for monitoring vehicle height change according to claim 2, characterized in that: The sensor (5) is a height sensor or an angle sensor, and the sensor (5) is fixedly mounted on the piston (3); a first connecting rod (52) and a second connecting rod (53) are provided in the gas chamber (4); one end of the first connecting rod (52) is rotatably connected to the mounting seat (1), the other end of the first connecting rod (52) is rotatably connected to the second connecting rod (53), and one end of the second connecting rod (53) away from the first connecting rod (52) is fixedly connected to the signal turntable of the height sensor or the angle sensor; the rotating shaft of the first connecting rod (52), the rotating shaft of the second connecting rod (53) and the rotating shaft of the signal turntable are arranged in the same direction.
4. The air spring for monitoring vehicle height change according to claim 3, characterized in that: The wire hole (31) is arranged on the piston (3).
5. The air spring for monitoring vehicle height change according to claim 3, characterized in that: One end of the first connecting rod (52) is rotatably connected to the piston (3), and the sensor (5) is fixedly mounted on the mounting seat (1).
6. The air spring for monitoring vehicle height change according to claim 5, characterized in that: The wire passing hole (31) is arranged on the mounting seat (1).
7. The air spring for monitoring vehicle height changes according to any one of claims 2 to 6, characterized in that: An elastic sleeve (32) is provided in the wire hole (31), the outer wall of the elastic sleeve (32) is sealedly connected to the hole wall of the wire hole (31), and the wire (51) is located in the elastic sleeve (32) and is sealedly connected to the inner wall of the elastic sleeve (32).
8. The air spring for monitoring vehicle height change according to claim 7, characterized in that: A sealing rubber layer is provided between the wire hole (31) and the elastic sleeve (32), and between the elastic sleeve (32) and the wire (51).