A low-noise light-weight air supply unit and a suspension assembly

Abstract

The utility model relates to vehicle air suspension technical field, concretely relates to a kind of air supply unit and suspension assembly of low-noise light quality.The suspension assembly includes first support plate, second support plate, the first support plate and the second support plate are connected with first level suspension, and the second level suspension is installed on the first support plate;Second level suspension includes metal bush, first rubber bush and second rubber bush are set on metal bush.The utility model is connected with first support plate and second support plate by first level suspension, in combination with the double rubber bush design of second level suspension, form multistage damping structure, effectively attenuate the vibration transmission of different frequency bands, significantly improve the NVH performance of suspension system.The first support plate, second support plate are combined with first level suspension and second level suspension, layout is adjusted according to installation space, while reducing redundant material, realize light weight, reduce the occupation of space.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air suspension technology, specifically to a low-noise, lightweight air supply unit and suspension assembly. Background Technology

[0002] Vehicle air suspension systems are primarily used to adjust vehicle ground clearance by regulating air pressure. A vehicle air suspension system includes components such as air springs, an air supply unit, and air springs. The air supply unit typically includes an air compressor, solenoid valves, structural supports, various levels of damping mounts, intake and exhaust pipes, and electrical connectors. The air supply unit is usually responsible for generating, storing, and regulating compressed air, and delivering the compressed air to the air springs to control the inflation and deflation of the air springs, thereby adjusting the air suspension stiffness and vehicle height.

[0003] In existing technologies, air compressors are mostly piston-type brushed motor structures, which have relatively high overall operating noise. Therefore, air compressors are usually arranged in the acoustic package through vibration damping units. The acoustic package is then connected to the vehicle body through other vibration damping units and connecting brackets. However, the acoustic package structure is relatively complex, resulting in a large overall volume of the acoustic package structure, which further increases the volume of the connecting bracket structure. This leads to a large overall volume and weight of the air supply unit, which occupies a lot of vertical space under the vehicle and increases costs.

[0004] Therefore, it is necessary to provide a low-noise, lightweight air supply unit and suspension assembly. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the purpose of this utility model embodiment is to provide a low-noise, lightweight air supply unit and suspension assembly; it eliminates the complex acoustic package structure, and forms a multi-stage vibration reduction structure by connecting the first and second support plates through a primary suspension and combining the double rubber bushing design of the secondary suspension, effectively attenuating the transmission of vibrations in different frequency bands and significantly improving the NVH (Noise, Vibration, Harshness) performance of the suspension system.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: This utility model discloses a suspension assembly for an air supply unit. The suspension assembly includes a first support plate, a second support plate, a primary suspension connecting the first support plate and the second support plate, and a secondary suspension mounted on the first support plate; The secondary suspension includes a metal bushing, a first rubber bushing and a second rubber bushing disposed on the metal bushing.

[0007] Preferably, the metal bushing is a long cylindrical structure with a circular top and a hole at the bottom; the first rubber bushing is a flat circular ring structure with a circular hole in the middle; and the second rubber bushing is a short cylindrical structure with a circular top and a hole at the bottom. The first rubber sleeve is located near the top of the metal bushing, and the short columnar structure of the second rubber bushing is fitted onto the long columnar structure of the metal bushing, abutting against the first rubber bushing to form a large groove; the various circular holes on the metal bushing, the first rubber bushing, and the second rubber bushing are interconnected to form a large circular hole inside the secondary suspension.

[0008] Preferably, the first support plate is provided with a mounting part, the mounting part is recessed to form a mounting support surface, and a through hole is opened in the middle of the mounting support surface. The second support plate is provided with a mounting hole, and the primary suspension passes through the through hole and is fixed in the mounting hole, thereby connecting the first support plate and the second support plate.

[0009] Preferably, the first support plate is further provided with a plurality of fixing holes, the secondary suspension is installed in the fixing holes, and the large groove formed thereon is engaged with the fixing holes; The primary suspension is an elastic connection device, including a screw, a rubber bushing sleeved on the outside of the screw, and a rubber pad and spring disposed between the screw and the rubber bushing.

[0010] Preferably, the first support plate is an irregular quadrilateral cast aluminum structure, and the thickness of the cast aluminum structure is 4-6 mm; The middle part of the surface of the first support plate is raised, and grooves are respectively formed on both sides of the raised surface.

[0011] Preferably, the first support plate contains multiple shaped irregular structures; the first sheet metal support plate is also provided with connecting brackets and buckles.

[0012] Preferably, the second support plate is an irregular quadrilateral sheet metal part, and the thickness of the sheet metal part is 2mm; The middle part of the surface of the second support plate is raised, and grooves are respectively formed on both sides of the raised surface.

[0013] Preferably, the primary suspension is an elastic connection device, including a screw, a rubber bushing sleeved on the outside of the screw, and a rubber pad and a spring disposed between the screw and the rubber bushing.

[0014] This invention also provides a low-noise, lightweight air supply unit. The air supply unit includes the suspension assembly of any of the air supply units described above.

[0015] Preferably, the air supply unit further includes an air compressor, on which an inflation high-pressure pipe assembly, an air pipe assembly, and a distribution valve assembly are connected, and the suspension assembly is used to connect the air compressor to the bottom of the vehicle.

[0016] Preferably, the air compressor is provided with bolt holes for connection with the mounting holes via bolts; The bottom of the vehicle is equipped with M8 bolts that pass through the large circular holes of the secondary suspension and are secured with nuts.

[0017] The distribution valve assembly is mounted on the connecting bracket and secured with the buckle; the inflation high-pressure pipe assembly and the air pipe assembly are secured to the first support plate by the buckle.

[0018] The beneficial effects of this utility model are as follows: This utility model provides a low-noise, lightweight air supply unit and suspension assembly. The suspension assembly includes a first support plate, a second support plate, a primary suspension connecting the first and second support plates, and a secondary suspension mounted on the first support plate. The secondary suspension includes a metal bushing, and a first rubber bushing and a second rubber bushing disposed on the metal bushing. This utility model, through the primary suspension connecting the first and second support plates and the double rubber bushing design of the secondary suspension, forms a multi-stage vibration reduction structure, effectively attenuating the transmission of vibrations in different frequency bands and significantly improving the NVH performance of the suspension system. The first and second support plates, combined with the primary and secondary suspensions, facilitate layout adjustments according to installation space, while reducing redundant materials, achieving lightweight design, and reducing space occupation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the air supply unit of this utility model.

[0021] Figure 2 This is an exploded structural diagram of the air supply unit of this utility model.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the suspension assembly of this utility model.

[0023] Figure 4 This is a schematic diagram of the overall structure of the primary suspension of this utility model.

[0024] Figure 5 This is a schematic diagram of the primary suspension explosion structure of this utility model.

[0025] Figure 6 This is a schematic diagram of the overall structure of the two-stage suspension of this utility model.

[0026] Figure 7 This is a schematic diagram of the two-stage suspended explosion structure of this utility model.

[0027] The component names and their numbers in the diagram are as follows: 100. Air supply unit; 1. Air compressor; 11. Bolt holes; 2. Suspension assembly; 21. First support plate; 22. Second support plate; 23. Primary suspension; 24. Secondary suspension; 210. Mounting location; 211. Mounting support surface; 212. Fixing hole; 213. Connecting bracket; 214. Clip; 215. Through hole; 221. Bolt through hole; 222. Mounting hole; 231. Screw; 232. Rubber pad; 233. Spring; 234. Rubber bushing; 241. Metal bushing; 242. First rubber bushing; 243. Second rubber bushing; 244. Large groove; 245. Large round hole; 3. High-pressure inflation assembly; 4. Air pipe assembly; 41. Inlet pipe; 42. Exhaust pipe; 5. Distribution valve assembly. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Throughout the specification, reference to "one embodiment" or "embodiment" means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, specific features, structures, or characteristics can be combined in any suitable manner.

[0032] like Figure 1-3 As shown, this embodiment provides a low-noise, lightweight air supply unit 100, which includes an air compressor 1, a suspension assembly 2 for suspending the air compressor 1, a high-pressure inflation assembly 3, an air pipe assembly 4, and a distribution valve assembly 5 mounted on the air compressor 1. The air compressor 1 is provided with a plurality of bolt holes 11 for connecting the suspension assembly 2; the air compressor 1 is a brushless DC motor air compressor, which has low noise.

[0033] In this embodiment, as Figure 3 As shown, the suspension assembly 2 consists of a first support plate 21, a second support plate 22, a primary suspension 23, and a secondary suspension 24. The first support plate 21 and the second support plate 22 are connected by the primary suspension 23. The first support plate 21 has a mounting portion 210, which is recessed to form a mounting support surface 211. A through hole 215 is opened in the middle of the mounting support surface 211. In this embodiment, there are three sets of such mounting portions 210. The primary suspension 23 passes through the through hole 215 to connect the first support plate 21 and the second support plate 22. The first support plate 21 also has four fixing holes 212 for fixing the secondary suspension 24. The second support plate 22 has three bolt through holes 221 and three mounting holes 222. The first support plate 21 is also provided with a connecting bracket 213 and several buckles 214. The distribution valve 5 is assembled on the connecting bracket 213. One end of the high-pressure charging pipe 3 is inserted into the high-pressure quick connector of the air compressor 1, and the other end is inserted into the pressure supply port of the distribution valve 5. The air pipe assembly 4 includes an inlet pipe 41 and an exhaust pipe 42. The inlet pipe 41 is connected to the air inlet (not shown in the figure) of the air compressor 1, and the exhaust pipe 42 is connected to the exhaust port (not shown in the figure) of the air compressor 1. At the same time, it is fixed to the side of the first support plate 21 with buckles 514.

[0034] In this embodiment, as Figure 4-5 As shown, the primary suspension 23 is an elastic connection device, including a screw 231, a rubber bushing 234 fitted onto the screw 231, and a rubber pad 232 and a spring 233 disposed between the screw 231 and the rubber bushing 234. The rubber pad 232 is disposed on the screw shank near the head of the screw 231, and one end of the spring 233 abuts against the rubber pad, while the other end is compressed in the mounting hole 222. In actual installation, the rubber pad 232 and the spring 233 are fitted onto the screw 231, and then the rubber bushing 234 is fitted on top. A portion of the screw 233 and the rubber bushing 234 are passed through the through hole 215, and the bottom of the screw 233 passes through the mounting hole 222 and is secured with a nut. The middle portion of the rubber bushing 234 is snapped onto the mounting support surface 211, connecting the first support plate 21 and the second support plate 22.

[0035] In this embodiment, as Figure 6-7 As shown, the secondary suspension 24 includes a metal bushing 241, a first rubber bushing 242 and a second rubber bushing 243 disposed on the metal bushing 241. Specifically, as... Figure 7 As shown, the metal bushing 241 is a long cylindrical structure with a circular top and a circular hole at the bottom; the first rubber bushing 242 is a flat circular ring structure with a circular hole in the middle; the second rubber bushing 243 is a short cylindrical structure with a circular top and a circular hole at the bottom; the first rubber bushing 242 is located near the top of the metal bushing 241, and the short cylindrical structure of the second rubber bushing 243 fits onto the long cylindrical structure of the metal bushing 241, abutting against the first rubber bushing 242 to form a large groove 244; the circular holes on the metal bushing 241, the first rubber bushing 242, and the second rubber bushing 243 are interconnected to form a large circular hole 245 inside the secondary suspension 24. The secondary suspension 24 is installed in the fixing hole 212 of the first support plate 21, and the large groove 244 formed thereon is engaged with the fixing hole 212. An M8 bolt is provided at the bottom of the vehicle, which passes through the large circular hole 245 inside the secondary suspension 24 and is secured to the bottom of the vehicle with a nut.

[0036] In this embodiment, as Figure 3As shown, both the first support plate 21 and the second support plate 22 are irregular quadrilaterals with convex surfaces in the middle, enhancing their structural strength and avoiding the area where the air compressor 1 is installed. Simultaneously, without affecting the strength of the suspension assembly 2, grooves are formed on both sides of the convex surfaces of the first and second support plates 21 and 22, reducing their weight and achieving cost reduction. The first support plate 21 is a cast aluminum structure with a maximum thickness of 6mm and a minimum thickness of 4mm. Due to the properties of cast aluminum, the first support plate 21 can be formed into multiple irregular shapes, and together with the second support plate 22, it provides multiple mounting structures for other components at the bottom of the vehicle. The process is simple, the forming is easy, the space utilization is high, and the strength is stable. The second support plate 22 is a sheet metal part with a thickness of 2mm, reducing welding quality issues associated with sheet metal parts. The structure is more robust and stable.

[0037] The air supply unit 100 of this embodiment includes an air compressor 1 and a suspension assembly 2 for suspending the air compressor 1 at the bottom of the vehicle. The air compressor 1 is connected to an inflation high-pressure pipe assembly 3, an air pipe assembly 4, and a distribution valve assembly 5. The suspension assembly 2 includes a first support plate 21, a second support plate 22, a primary suspension 23 connecting the first support plate 21 and the second support plate 22, and a secondary suspension 24 connected to the bottom of the vehicle. The secondary suspension 24 is mounted on the first support plate 21, and the second support plate 22 is connected to the air compressor 1 by bolts. This embodiment connects the first and second support plates through the primary suspension and combines it with the double rubber bushing design of the secondary suspension to form a multi-stage vibration damping structure, effectively attenuating the transmission of vibrations in different frequency bands and significantly improving the NVH performance of the suspension system. The first and second support plates, combined with the primary and secondary suspensions, facilitate layout adjustments according to installation space, while reducing redundant materials, achieving weight reduction, and minimizing space occupation. This invention's low-noise, lightweight air supply unit replaces the connecting bracket with a suspension assembly, eliminating the complex acoustic package structure. An aluminum casting connecting bracket connects the air compressor and the vehicle body, reducing the air supply unit's size and eliminating the need to consider under-vehicle space occupation. This allows the air supply unit to be placed in a more confined space, reducing costs. Furthermore, the use of a brushless DC motor in the air compressor instead of a piston-type brushed motor improves the vehicle's NVH performance.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A suspension assembly, characterized in that, The suspension assembly includes a first support plate, a second support plate, a primary suspension connecting the first support plate and the second support plate, and a secondary suspension mounted on the first support plate; The secondary suspension includes a metal bushing, a first rubber bushing and a second rubber bushing disposed on the metal bushing.

2. The suspension assembly according to claim 1, characterized in that, The metal bushing is a long cylindrical structure with a circular top and a circular hole at the bottom; the first rubber bushing is a flat circular ring structure with a circular hole in the middle; the second rubber bushing is a short cylindrical structure with a circular top and a circular hole at the bottom. The first rubber bushing is located near the top of the metal bushing, and the short columnar structure of the second rubber bushing is fitted onto the long columnar structure of the metal bushing, abutting against the first rubber bushing to form a large groove; the various circular holes on the metal bushing, the first rubber bushing, and the second rubber bushing are interconnected to form a large circular hole inside the secondary suspension.

3. The suspension assembly according to claim 2, characterized in that, The first support plate is provided with a mounting part, which is recessed to form a mounting support surface. A through hole is opened in the middle of the mounting support surface. The second support plate is provided with a mounting hole. The first-stage suspension passes through the through hole and is fixed in the mounting hole, thus connecting the first support plate and the second support plate.

4. The suspension assembly according to claim 3, characterized in that, The first support plate is also provided with several fixing holes, and the secondary suspension is installed in the fixing holes, and the large groove formed thereon is engaged with the fixing holes; The primary suspension is an elastic connection device, including a screw, a rubber bushing sleeved on the outside of the screw, and a rubber pad and a spring disposed between the screw and the rubber bushing.

5. The suspension assembly according to claim 4, characterized in that, The first support plate is an irregular quadrilateral cast aluminum structure with a thickness of 4-6 mm. The middle part of the surface of the first support plate is raised, and grooves are respectively formed on both sides of the raised surface.

6. The suspension assembly according to claim 5, characterized in that, The first support plate contains multiple shaped structures; the first support plate is also provided with connecting brackets and buckles.

7. The suspension assembly according to claim 3, characterized in that, The second support plate is an irregular quadrilateral sheet metal part with a thickness of 2mm; The middle part of the surface of the second support plate is raised, and grooves are respectively formed on both sides of the raised surface.

8. A low-noise, lightweight air supply unit, characterized in that, The air supply unit includes the suspension assembly of the air supply unit as described in any one of claims 1-7.

9. The low-noise, lightweight air supply unit according to claim 8, characterized in that, The air supply unit also includes an air compressor, which is connected to an inflation high-pressure pipe assembly, an air pipe assembly, and a distribution valve assembly. The suspension assembly is used to connect the air compressor to the bottom of the vehicle.

10. The low-noise, lightweight air supply unit according to claim 9, characterized in that, The air compressor is provided with bolt holes, which are used to connect with the mounting holes by bolts. The bottom of the vehicle is equipped with M8 bolts, which pass through the large round holes of the secondary suspension and are secured with nuts; The distribution valve assembly is mounted on the connecting bracket and secured with the buckle; the inflation high-pressure pipe assembly and the air pipe assembly are secured to the first support plate by the buckle.

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