An integrated air spring for commercial vehicles with shock-absorbing function and a commercial vehicle

Abstract

The present invention relates to an integrated air spring for commercial vehicles with a shock absorption function and a commercial vehicle, which may include: a main body, which includes: a base, which has an auxiliary air chamber inside, and a bottom plate is provided at the bottom of the base; a bladder fixed to the base, the bladder has a main air chamber communicated with the auxiliary air chamber inside, a top plate is provided at the top of the bladder, and an air inlet is provided on the top plate; a cable displacement sensor, which includes a fixed end installed on the top plate and a sensor end installed on the bottom plate, the fixed end and the sensor end are connected by a cable; and a rubber body, which is fixed to the outside of the sensor end, an additional air chamber is arranged inside the rubber body, and the additional air chamber is communicated with the auxiliary air chamber through a first gap. The height sensor is integrated, reducing the space occupation, with low cost. The gas can flow between different air chambers and generate damping by friction, improving the shock absorption effect of the air spring.

Description

Technical Field

[0001] The present invention relates to the technical field of electronically controlled air suspension systems for commercial vehicles, and particularly to an integrated air spring for commercial vehicles with shock absorption function and a commercial vehicle. Background Art

[0002] At present, as one of the three major components of a suspension, an elastic element is often desired to have a variable stiffness to ensure that the natural frequency of the vehicle body remains relatively constant under changing loads. The air spring has become an ideal choice among elastic elements due to its variable stiffness characteristics and is widely used in the suspension systems of transportation. The commonly used air spring is a relatively simple air spring, which only serves as an element to bear axial loads, and other elements such as shock absorbers need to be arranged; moreover, the air spring requires a certain space to arrange a height sensor to measure the height of the air spring in real time to adjust the intake air pressure to change the stiffness, resulting in a reduced integration compared with the leaf spring suspension. These two defects limit the application of the air spring to a certain extent.

[0003] In related technologies, two solutions are provided. The first is to set a three-in-one sensor and an electromagnetic valve inside the airbag, making the height measurement electronic control system more concise, saving installation man-hours, and improving production efficiency; the second is to set an external auxiliary air chamber and two throttle pipes with different diameters, enabling the air spring to have four levels of stiffness and damping characteristics, expanding the functions of the air spring.

[0004] However, the first three-in-one sensor is integrated by an ultrasonic height sensor, an on-board pressure sensor, and an on-board temperature sensor, with a high cost and without solving the defect that the air spring cannot absorb shock; the external auxiliary air chamber and the unequal-diameter double throttle pipes in the second solution greatly increase the layout space, and an external height sensor is still required to measure the height in real time.

[0005] Therefore, it is necessary to propose a new integrated air spring for commercial vehicles with shock absorption function to solve the above problems. Summary of the Invention

[0006] Embodiments of the present invention provide an integrated air spring for commercial vehicles with shock absorption function and a commercial vehicle, to solve the problems in related technologies that the air spring with a three-in-one sensor has a high cost and no shock absorption function, and the air spring with an external auxiliary air chamber and two throttle pipes with different diameters still requires an external height sensor to measure the height in real time.

[0007] In a first aspect, an integrated air spring for a commercial vehicle with a shock absorption function is provided, which may include: a main body, which includes: a base having an auxiliary air chamber inside, and a bottom plate provided at the bottom of the base; a bladder fixed to the base, the bladder having a main air chamber communicating with the auxiliary air chamber inside, and a top plate provided at the top of the bladder, and an air inlet provided on the top plate; a cable displacement sensor, which includes a fixed end mounted on the top plate and a sensor end mounted on the bottom plate, the fixed end and the sensor end are connected by a cable; and a rubber body fixed to the outside of the sensor end, an additional air chamber is provided inside the rubber body, and the additional air chamber communicates with the auxiliary air chamber through a first gap.

[0008] In some embodiments, the additional air chamber includes a first additional air chamber formed by the rubber body and the outer wall of the sensor end; a second additional air chamber formed by the rubber body and the side wall of the base, and the first additional air chamber and the second additional air chamber communicate through a channel.

[0009] In some embodiments, a first partition is provided at the top of the rubber body, the first partition penetrates and is fixed to the sensor end, and a first gap is formed between the outside of the first partition and the side wall, and the first gap communicates with the second additional air chamber.

[0010] In some embodiments, the inner wall of the second additional air chamber is recessed toward the side close to the sensor end.

[0011] In some embodiments, a second partition is provided at the bottom of the rubber body, the second partition penetrates and is fixed to the sensor end, and the bottom of the second partition is fixed to the bottom plate.

[0012] In some embodiments, one end of the bottom plate away from the sensor end has a protrusion protruding toward the direction close to the rubber body, one end of the sensor end close to the bottom plate has a radially extending boss, planes are provided at the top of the protrusion and the top of the boss, and the planes of the protrusion and the boss are on the same plane, and the second partition is fixed to the plane.

[0013] In some embodiments, the sensor end has a cylinder, and the boss is provided outside the cylinder; the annular width of the second partition is greater than or equal to the distance between the inside of the protrusion and the outer wall of the cylinder.

[0014] In some embodiments, there are at least two rubber bodies, and the two rubber bodies are separated by a third partition, and a second gap is provided between the outside of the third partition and the side wall of the base.

[0015] In some embodiments, holes are provided on the bottom plate, and the data cable of the cable displacement sensor passes through the holes.

[0016] In a second aspect, a commercial vehicle is provided, which includes the integrated air spring for commercial vehicle with shock-absorbing function. The air inlet of the integrated air spring for commercial vehicle with shock-absorbing function is connected to the air intake pipe of the commercial vehicle. The top plate is fixed to the frame of the commercial vehicle, and the bottom plate is fixed to the steering arm / trailing arm beam of the commercial vehicle.

[0017] The beneficial effects brought by the technical solution provided by the present invention include:

[0018] 1. The embodiment of the present invention provides an integrated air spring for commercial vehicle with shock-absorbing function and a commercial vehicle. Since a cable displacement sensor is arranged inside the air spring, the height of the air spring can be measured in real time to adjust the intake air pressure and change the stiffness, realizing the built-in height sensor, avoiding the possibility of interference between the auxiliary mechanism for height measurement during the installation of the air spring and the rear axle / tire, reducing the space occupation and having low cost.

[0019] 2. Since a rubber body with an additional air chamber is arranged inside the air spring, and the additional air chamber is communicated with the air chamber of the air spring through a gap, a pressure difference is generated between different air chambers when the air spring bears a load impact, enabling the gas to flow between different air chambers and generate friction to produce damping. The impact kinetic energy of the air spring is absorbed by the damping and converted into heat energy, thereby weakening the load impact borne by the air spring and improving the shock-absorbing effect of the air spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic cross-sectional structure diagram of an integrated air spring for commercial vehicle with shock-absorbing function provided by an embodiment of the present invention;

[0022] Figure 2 It is a schematic partial cross-sectional structure diagram of an integrated air spring for commercial vehicle with shock-absorbing function provided by an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the main body of an integrated air spring for commercial vehicle with shock-absorbing function provided by an embodiment of the present invention.

[0024] Reference numerals in the drawings:

[0025] 1. Body; 11. Main air chamber; 12. Bladder; 13. Auxiliary air chamber; 14. Base; 141. Side wall; 15. Bottom plate; 151. Protrusion; 16. Top plate; 17. Air inlet.

[0026] 2. Cable displacement sensor; 21. Fixed end; 22. Sensor end; 221. Boss; 222. Cylinder; 23. Cable; 24. Data line.

[0027] 3. Rubber body; 31. Additional air chamber; 311. First additional air chamber; 312. Second additional air chamber; 313. Channel; 32. First gap; 33. First partition; 34. Second partition; 35. Third partition; 36. Second gap. Detailed implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The embodiments of the present invention provide an integrated air spring for commercial vehicles with a shock absorption function and a commercial vehicle, which can solve the problems in the related art that the air spring with a three-in-one sensor has a high cost and no shock absorption function, and the air spring with an externally provided auxiliary air chamber and two throttle pipes with different diameters still needs to externally provide a height sensor to measure the height in real time.

[0030] See Figure 1 、 Figure 2 and Figure 3 As shown in

[0031] An integrated air spring for commercial vehicles with a shock absorption function provided by the embodiments of the present invention may include a body 1, a cable displacement sensor 2, and a rubber body 3. The body 1 may include: a base 14 with an auxiliary air chamber 13 inside, and a bottom plate 15 provided at the bottom of the base 14; a bladder 12 fixedly connected to the base 14, with a main air chamber 11 communicating with the auxiliary air chamber 13 inside the bladder 12, a top plate 16 provided at the top of the bladder 12, and an air inlet 17 provided on the top plate 16.

[0032] In this embodiment, when the load acting on the air spring increases, the bladder 12 is compressed under the load. When the load decreases, the bladder 12 has a certain resilience and can return to its original loaded position. The interior of the base 14, the bladder 12, and the top plate 16 encloses a sealed space, and gas can be filled into the main air chamber 11 and the auxiliary air chamber 13 through the air inlet 17. When compressed air is filled into the sealed main air chamber 11 and auxiliary air chamber 13, the elastic effect of the air spring can be achieved by utilizing the compressibility of the gas.

[0033] The cable displacement sensor 2 may include a fixed end 21 mounted on the top plate 16 and a sensor end 22 mounted on the bottom plate 15, and the fixed end 21 and the sensor end 22 are connected by a cable 23.

[0034] In this embodiment, the function of the cable displacement sensor 2 is to convert mechanical motion into electrical signals that can be measured, recorded, or transmitted. Its fixed end 21 is mounted at the axis of the top plate 16, and the sensor end 22 is mounted at the axis of the bottom plate 15. Since the top plate 16 and the bottom plate 15 are coaxial, the fixed end 21 and the sensor end 22 are also coaxial. The two are connected by a cable 23, and the data cable 24 of the sensor passes through the hole in the bottom plate. Its measured data is transmitted to the processor through the data cable for real-time calculation, and then the inflation pressure is adjusted according to a predetermined strategy to adjust the height of the air spring. When the air spring deforms under the load, the top plate 16 and the bottom plate 15 will move relative to each other, that is, the distance between them will change, so the height of the air spring also changes. By arranging the cable displacement sensor 2 inside the air spring, with the fixed end 21 mounted on the top plate 16 of the air spring and the sensor end 22 being a cylindrical structure with a boss 221, coaxially fixedly connected to the central bolt of the bottom plate 15, and the fixed end 21 and the sensor end 22 being connected by a cable 23, the relative movement of the top plate 16 and the bottom plate 15 will drive the sensor end 22 and the fixed end 21 to move as well, so that the height of the air spring can be measured in real time. According to the height of the air spring, the intake air pressure is adjusted, so that the stiffness of the air spring can be changed to meet different stiffness requirements. It has a wide range of application scenarios. And by installing the cable displacement sensor 2 inside the main body 1 and measuring the real-time height of the air spring by using the movement between the top plate 16 and the bottom plate 15, the height sensor is built-in. Compared with the method of measuring the height of the air spring by an external auxiliary mechanism, the built-in cable displacement sensor 2 in this solution avoids the possibility of interference between the auxiliary mechanism for height measurement during the installation of the air spring and the rear axle / tire, reduces the space occupation, and the cable displacement sensor 2 is easy to obtain and has a low cost.

[0035] The rubber body 3 is fixed to the outside of the sensor end 22, and an additional air chamber 31 is provided inside the rubber body 3, and the additional air chamber 31 communicates with the auxiliary air chamber 13 through a first gap 32.

[0036] In this embodiment, since a rubber body 3 with an additional air chamber 31 is provided inside the air spring, and the additional air chamber 31 is communicated with the air chamber of the air spring through a first gap 32, when the load increases and causes the air spring pressure to increase, due to the existence of the first gap 32, a pressure difference will be generated between the additional air chamber 31 and the auxiliary air chamber 13, enabling the gas to flow and rub against each other between different air chambers to generate damping. The damping absorbs the impact kinetic energy of the air spring and converts the impact kinetic energy into heat energy, thereby weakening the load impact borne by the air spring and improving the shock absorption effect of the air spring. Specifically, when the load increases and causes the air spring pressure to increase, the air spring is compressed under load. Due to the existence of the first gap 32, a pressure difference is formed in the additional air chamber 31 and the auxiliary air chamber 13, and the gas flows in the additional air chamber 31 and the auxiliary air chamber 13 to form damping to absorb the impact kinetic energy; when the load decreases and causes the air spring pressure to decrease, the air spring returns to the constant load position through the resilience of the bladder 12. During the process of the air spring rebounding and resetting, due to the existence of the first gap 32, a pressure difference will be generated again in the additional air chamber 31 and the auxiliary air chamber 13, causing the gas to flow to form damping; in the entire working condition of the transportation device, the internal air flow of the air spring repeatedly circulates through the above steps to form damping, and part of the external impact kinetic energy is absorbed and converted through the damping effect, improving the shock absorption function of the air spring.

[0037] See Figure 2 As shown, in some embodiments, the additional air chamber 31 may include a first additional air chamber 311 surrounded by the rubber body 3 and the outer wall of the sensor end 22; a second additional air chamber 312 surrounded by the rubber body 3 and the side wall 141 of the base 14, and the first additional air chamber 311 and the second additional air chamber 312 are communicated through a channel 313.

[0038] In this embodiment, when the load increases and causes the air spring pressure to increase, the gas in the auxiliary air chamber 13 can enter the second additional air chamber 312 through the first gap 32. Due to the existence of the first gap 32, a pressure difference is generated between the second additional air chamber 312 and the auxiliary air chamber 13, and the gas can flow and rub against each other between the second additional air chamber 312 and the auxiliary air chamber 13 to generate a first damping. Due to the existence of the first damping, part of the kinetic energy is converted into heat energy and dissipated; a number of channels 313 are evenly distributed along the circumferential part inside the rubber body 3, connecting the first additional air chamber 311 and the second additional air chamber 312. The size of the channels 313 is such that a certain damping can be generated when the air spring is pressurized / depressurized. When the air pressure further increases, the gas enters the first additional air chamber 311 from the second additional air chamber 312 through the channels 313. Due to the existence of the channels 313, a pressure difference is generated between the first additional air chamber 311 and the second additional air chamber 312, and the gas can flow and rub against each other between the first additional air chamber 311 and the second additional air chamber 312 to generate a second damping. Due to the existence of the second damping, part of the kinetic energy is converted into heat energy and dissipated, so that the generation of multi-stage damping can be realized, and the shock absorption capacity can be automatically adjusted according to the load size borne by the air spring, and the applicable range is wider.

[0039] In other embodiments, the first additional air chamber 311 and the second additional air chamber 312 can also be arranged at other positions of the rubber body 3. For example, they can be in the middle of the rubber body 3, or at the top, or at the bottom. The auxiliary air chamber 13 can also be communicated with the first additional air chamber 311 alone, or with the second additional air chamber 312 alone, or with both the first additional air chamber 311 and the second additional air chamber 312 at the same time.

[0040] Preferably, the first damping is less than the second damping, so as to ensure that the second damping takes effect after the first damping takes effect, and the generation of multi-stage damping is realized. The magnitudes of the first damping and the second damping can be changed by adjusting factors such as the size, shape, and material of the first gap 32 and the channels 313, or by adjusting factors such as the size, shape, and material of the first additional air chamber 311 and the second additional air chamber 312.

[0041] In other embodiments, the first damping can also be greater than the second damping, so that the second damping takes effect before the first damping takes effect.

[0042] Furthermore, the rubber body 3 can produce a certain amount of minute deformation under the action of air pressure, and can also assist in generating a certain amount of damping.

[0043] See Figure 1 and Figure 2As shown, in some embodiments, a first partition 33 may be provided at the top of the rubber body 3. The first partition 33 penetrates and is fixed to the sensor end 22. A first gap 32 is formed between the outer side of the first partition 33 and the side wall 141. The first gap 32 communicates with the second additional air chamber 312.

[0044] In this embodiment, the size of the first gap 32 is such that a certain damping can be generated when the air spring is pressurized / depressurized. A round hole is provided in the center of the first partition 33. The first partition 33 is fixedly connected to the sensor end 22 without gaps by welding or other connection means. The first partition 33 is used to support the rubber body 3 and enclose a sealed space with the bottom plate 15. Airflow can only enter through the first gap 32, so that a pressure difference is generated between the second additional air chamber 312 and the auxiliary air chamber 13, and thus damping is generated.

[0045] In other embodiments, the first partition 33 may not be provided. A first gap 32 is provided between the rubber body 3 and the side wall 141, or the first gap 32 may be directly provided on the rubber body 3, and the purpose of generating damping and thus reducing vibration can also be achieved. However, since the rubber body 3 has a low hardness and certain elasticity, the size of the first gap 32 may change, and thus the same vibration reduction effect as that of the first partition 33 may not be achieved.

[0046] See Figure 2 As shown, in some embodiments, the inner wall of the second additional air chamber 312 may be recessed toward the side close to the sensor end 22.

[0047] In this embodiment, the inner wall of the second additional air chamber 312 is arc-shaped and recessed toward the side close to the sensor end 22, so that the volume of the second additional air chamber 312 is relatively large and can accommodate more gas. Thus, more gas can flow in the second additional air chamber 312, so that the rubber body 3 can generate greater damping. The greater damping causes more kinetic energy to be converted into heat energy and dissipated, so that the vibration reduction effect of the air spring is better.

[0048] In other embodiments, the inner walls of the first additional air chamber 311 and the second additional air chamber 312 may also be linear, arc-shaped, or other shapes.

[0049] See Figure 1 and Figure 2 As shown, in some embodiments, a second partition 34 may be provided at the bottom of the rubber body 3. The second partition 34 penetrates and is fixed to the sensor end 22. The bottom of the second partition 34 is fixed to the bottom plate 15.

[0050] In this embodiment, a circular hole is provided at the center of the second partition plate 34. The second partition plate 34 is fixedly connected to the sensor end 22 without gaps by welding or other connection means. The upper and lower surfaces of the rubber body 3 are respectively fixedly connected to the first partition plate 33 and the second partition plate 34. The second partition plate 34 is used for bottom sealing, so as to form a sealed space between the first partition plate 33 and the second partition plate 34, preventing gas from flowing out through the gap between the rubber body 3 and the side wall 141 and avoiding affecting the effect of the air spring. The second partition plate 34 can have a certain gap with the side wall 141 for easy assembly.

[0051] See Figure 2 As shown, in some embodiments, one end of the bottom plate 15 away from the sensor end 22 has a protrusion 151 protruding in the direction close to the rubber body 3. One end of the sensor end 22 close to the bottom plate 15 has a radially extending boss 221. Planes are provided at the tops of both the protrusion 151 and the boss 221, and the planes of the protrusion 151 and the boss 221 are on the same plane. The second partition plate 34 can be fixed to the plane.

[0052] In this embodiment, the planes of the protrusion 151 and the boss 221 are on the same plane. When the second partition plate 34 is placed on the protrusion 151 and the boss 221, the second partition plate 34 can be horizontally fixed on the plane, ensuring that the second partition plate 34 is in surface contact with both the plane of the protrusion 151 and the plane of the boss 221, so as to achieve the purpose that there are no gaps after the three are fixedly connected. The fixing method can be welding, bolt connection, etc., to ensure the sealing of the chamber formed by the second partition plate 34 and the bottom plate 15 and avoid gas leakage from the hole where the data line 24 passes through. Among them, the second partition plate 34 can be fixed to both the plane of the protrusion 151 and the plane of the boss 221 at the same time, or only fixed to the plane of the protrusion 151, or fixed to the side wall 141.

[0053] See Figure 2 As shown, in some embodiments, the sensor end 22 has a cylinder 222, and the boss 221 is provided on the outer side of the cylinder 222; the ring width of the second partition plate 34 is greater than or equal to the distance between the inner side of the protrusion 151 and the outer wall of the cylinder 222.

[0054] In this embodiment, the second partition plate 34 is annular. The ring width of the annular second partition plate 34 is equal to the outer radius minus the inner radius. The ring width of the second partition plate 34 is greater than or equal to the distance between the inner side of the protrusion 151 and the outer wall of the cylinder 222, so that the second partition plate 34 can be fixed to both the protrusion 151 and the cylinder 222 at the same time. The second partition plate 34 cooperates with the protrusion 151 and the cylinder 222 to achieve the sealing purpose, ensuring that gas cannot enter the chamber formed by the second partition plate 34 and the bottom plate 15 and avoiding gas leakage from the hole where the data line 24 passes through.

[0055] See Figure 2 As shown, in some embodiments, the rubber body 3 may have at least two. The two rubber bodies 3 are separated by a third partition 35, and there is a second gap 36 between the outer side of the third partition 35 and the side wall 141 of the base 14.

[0056] In this embodiment, the size of the second gap 36 is such that a certain damping can be generated when the air spring is pressurized / depressurized. When the load further increases, the gas can enter the lower rubber body 3 through the second gap 36. Due to the existence of the second gap 36, a pressure difference is generated between the two rubber bodies 3, and the gas can flow and rub against each other between the two rubber bodies 3 to generate a third damping, which is more conducive to the generation of multi-stage damping. The shock absorption capacity adjustment range of the air spring is larger and the applicable range is wider.

[0057] See Figure 1 As shown, in some embodiments, holes are provided in the bottom plate 15, and the data line 24 of the cable displacement sensor 2 passes through the holes.

[0058] In this embodiment, the data line 24 of the cable displacement sensor 2 passes through the holes in the bottom plate 15 and transmits data to the processor for calculation, so that the air pressure in the air spring can be adjusted in real time to realize the built-in sensor for measuring the height.

[0059] An embodiment of the present invention also provides a commercial vehicle, which may include the integrated air spring for commercial vehicle with shock absorption function. The air inlet 17 of the integrated air spring for commercial vehicle with shock absorption function is connected to the air inlet pipe of the commercial vehicle. The top plate 16 is fixed to the frame of the commercial vehicle, and the bottom plate 15 is fixed to the steering arm / link beam of the commercial vehicle. In this embodiment, a central bolt can be installed at the axis of the bottom plate 15 to realize the connection with the steering arm. The fixing bolt of the top plate 16 is used to fixedly connect the top plate 16 with other structures, so as to realize the rigid connection with the frame. The air inlet 17 of the top plate 16 is connected to the air inlet pipe to realize the connection with the air chamber, and further realize the inflation and deflation of the bladder 12. The commercial vehicle can also implement any of the above embodiments of the integrated air spring for commercial vehicle with shock absorption function.

[0060] The principle of an integrated air spring for commercial vehicle with shock absorption function and a commercial vehicle provided by an embodiment of the present invention is:

[0061] By arranging a rubber body 3 inside the air spring to generate damping, the air spring is provided with a certain shock absorption function instead of simply acting as an elastic element. Moreover, by adjusting the gaps between the first partition 33, the third partition 35 and the side wall 141 and the size of the channel 313, multi-stage damping can be obtained. The height sensor is built-in, reducing the layout space and avoiding the possibility of interference between the auxiliary mechanism for height measurement during the installation of the air spring and the rear axle / tire. In addition, the use of the cable displacement sensor 2 has a relatively low cost. The electronic control system is made more concise, facilitating the general assembly installation, debugging, saving working hours and improving production efficiency.

[0062] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0064] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An integrated air spring for commercial vehicles with shock-absorbing function, characterized in that, It includes: A main body (1), which includes: - A base (14) with a secondary air chamber (13) inside, and a bottom plate (15) is provided at the bottom of the base (14); - An airbag (12) fixedly connected to the base (14), a main air chamber (11) communicating with the secondary air chamber (13) is inside the airbag (12), a top plate (16) is provided at the top of the airbag (12), and an air inlet (17) is provided on the top plate (16); A cable displacement sensor (2), which includes a fixed end (21) installed on the top plate (16) and a sensor end (22) installed on the bottom plate (15), and the fixed end (21) and the sensor end (22) are connected by a cable (23); And a rubber body (3) fixed to the outside of the sensor end (22), an additional air chamber (31) is provided inside the rubber body (3), and the additional air chamber (31) communicates with the secondary air chamber (13) through a first gap (32); The additional air chamber (31) includes: A first additional air chamber (311) surrounded by the rubber body (3) and the outer wall of the sensor end (22); A second additional air chamber (312) surrounded by the rubber body (3) and the side wall (141) of the base (14), and the first additional air chamber (311) and the second additional air chamber (312) are communicated through a channel (313).

2. The integrated air spring for commercial vehicles with shock-absorbing function according to claim 1, wherein: A first partition plate (33) is provided at the top of the rubber body (3), the first partition plate (33) penetrates and is fixed to the sensor end (22), and the first gap (32) is formed between the outside of the first partition plate (33) and the side wall (141), and the first gap (32) communicates with the second additional air chamber (312).

3. The integrated air spring for commercial vehicles with shock-absorbing function according to claim 1, wherein: The inner wall of the second additional air chamber (312) is recessed toward the side close to the sensor end (22).

4. The integrated air spring for commercial vehicles with shock-absorbing function according to claim 1, wherein: A second partition plate (34) is provided at the bottom of the rubber body (3), the second partition plate (34) penetrates and is fixed to the sensor end (22), and the bottom of the second partition plate (34) is fixed to the bottom plate (15).

5. The integrated air spring for commercial vehicles with shock-absorbing function according to claim 4, wherein: One end of the bottom plate (15) away from the sensor end (22) has a protrusion (151) protruding toward the direction close to the rubber body (3), one end of the sensor end (22) close to the bottom plate (15) has a radially extending boss (221), planes are provided at the tops of the protrusion (151) and the boss (221), and the planes of the protrusion (151) and the boss (221) are on the same plane, and the second partition plate (34) is fixed to the plane.

6. The integrated air spring for commercial vehicle with shock absorption function as claimed in claim 5, wherein: The sensor end (22) has a cylinder (222), and the boss (221) is arranged outside the cylinder (222); The ring width of the second partition plate (34) is greater than or equal to the distance between the inner side of the protrusion (151) and the outer wall of the cylinder (222).

7. The integrated air spring for commercial vehicle with shock absorption function as claimed in claim 1, wherein: There are at least two rubber bodies (3), and the two rubber bodies (3) are separated by a third partition plate (35), and there is a second gap (36) between the outer side of the third partition plate (35) and the side wall (141) of the base (14).

8. The integrated air spring for commercial vehicle with shock absorption function as claimed in claim 1, wherein: Holes are provided on the bottom plate (15), and the data line (24) of the cable displacement sensor (2) passes through the holes.

9. A commercial vehicle, characterized in that, It includes: The integrated air spring for commercial vehicle with shock absorption function as claimed in any one of claims 1-8, the air inlet (17) of the integrated air spring for commercial vehicle with shock absorption function is connected to the air inlet pipe of the commercial vehicle, the top plate (16) is fixed on the frame of the commercial vehicle, and the bottom plate (15) is fixed on the steering arm / trailing arm beam of the commercial vehicle.

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