Piston arm connecting assembly, air compressor, air suspension system and vehicle

Abstract

The utility model relates to a piston arm connecting assembly which comprises five cylinder sleeves, five piston arms and an eccentric wheel, the five cylinder sleeves are arranged on the periphery of the eccentric wheel at intervals, one end of each piston arm extends into one cylinder sleeve, the other end of each piston arm extends in the direction away from the cylinder sleeve, and the eccentric wheel is in transmission connection with the five piston arms. And the eccentric wheel rotates to drive each piston arm to reciprocate in the corresponding cylinder sleeve. The piston arm connecting assembly can improve the air compression efficiency of the air compressor and reduce the overall size of the air compressor. The utility model further provides an air compressor, an air suspension system and a vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a piston arm connection assembly, an air compressor, an air suspension system and a vehicle. Background Art

[0002] In order to improve the comfort and stability of the vehicle, the vehicle is usually equipped with an air suspension system to reduce the vibration during driving and the impact of uneven roads.

[0003] The air compressor of the existing air suspension system can drive a limited number of piston arms to work simultaneously, resulting in low air compression efficiency and a large overall volume of the air compressor. Utility Model Content

[0004] To solve the above problems, the present application provides a piston arm connection assembly, which improves the efficiency of air compressor air compression and reduces the overall volume of the air compressor by optimizing the internal structure of the piston arm connection assembly. The present application also provides an air compressor, an air suspension system and a vehicle. Specifically, the following solutions are included:

[0005] The present application provides a piston arm connection assembly, comprising: five cylinder sleeves, five piston arms and an eccentric wheel, wherein the five cylinder sleeves are arranged on the periphery of the eccentric wheel and are spaced apart from each other, one end of each piston arm extends into a cylinder sleeve, and the other end of each piston arm extends in a direction away from the cylinder sleeve, the eccentric wheel is transmission-connected to the five piston arms, and the eccentric wheel rotates to drive each piston arm to reciprocate in the cylinder sleeve corresponding thereto.

[0006] The piston arm connecting assembly of the present application can compress the air in the cylinder sleeve to drive the air spring to adjust the extension and contraction state by setting the piston arm to extend into the cylinder sleeve and reciprocate in the cylinder sleeve. By arranging five cylinder sleeves at intervals, the working efficiency of the piston arm connecting assembly driving the cylinder sleeve can be improved.

[0007] The piston arm connection assembly of the present application is connected to the five piston arms by transmission by setting an eccentric wheel, and five cylinder sleeves are arranged at intervals along the periphery of the eccentric wheel, so that when the eccentric wheel rotates, the eccentric wheel can drive the five piston arms to work at the same time, so as to improve the air compression efficiency of the piston arm connection assembly through the piston arms in the cylinder sleeve. Since the number of cylinder sleeves arranged at intervals and the corresponding piston arms is five, the air compression efficiency of the piston arm connection assembly through the piston arms in the cylinder sleeve can be further improved to meet the working requirements. At the same time, since the five cylinder sleeves are arranged at intervals, the extension directions of the five piston arms are located in the same plane, so the overall volume of the piston arm connection assembly can be reduced, thereby achieving the effect of miniaturized design of the piston arm connection assembly.

[0008] In one embodiment, mutually matching slide grooves and slide rails are provided between the five piston arms and the eccentric wheel, and the slide rails are embedded in the slide grooves; the eccentric wheel rotates and drives the slide rails to slide in the slide grooves to drive each piston arm to reciprocate.

[0009] In one embodiment, the slide rail is arranged around the outer peripheral surface of the eccentric wheel, and the slide groove is opened at the end of the five piston arms away from the cylinder sleeve.

[0010] In this embodiment, by arranging the slide rail around the eccentric wheel as the periphery and arranging the slide groove at the end of the five piston arms away from the cylinder sleeve, the eccentric wheel can drive the slide rail to slide in the slide groove, and then can synchronously drive the five piston arms to work. At the same time, the slide rail and the slide groove cooperate with each other to improve the efficiency of the piston arm connecting assembly in compressing air in the cylinder sleeve through the piston arm, while reducing the friction generated by the mutual movement between the internal structures of the piston arm connecting assembly to improve the working performance and life of the piston arm connecting assembly.

[0011] In one embodiment, the piston arm connecting assembly includes a connecting shaft and a bearing, wherein the connecting shaft is fixed to the eccentric wheel, the bearing sleeve is arranged on the connecting shaft and is constructed as a slide rail, and the slide groove is opened at one end of the five piston arms away from the cylinder sleeve.

[0012] In this embodiment, by setting the connecting shaft to be fixed to the eccentric wheel, when the eccentric wheel rotates, the connecting shaft and the bearing sleeved on the connecting shaft will be synchronously driven to rotate synchronously. At the same time, by setting the bearing structure as a slide rail and sliding in the slide groove, the friction between the slide rail and the slide groove can be further reduced, so as to further improve the working performance and life of the piston arm connecting assembly. By setting the bearing to extend into the slide groove, the contact area between the bearing and the two groove walls opposite to each other along the axial direction of the connecting shaft can be ensured, so as to limit the displacement of the piston arm along the axial direction of the connecting shaft, improve the effect of the reciprocating motion of the piston arm in the cylinder sleeve, and further improve the air compression efficiency of the piston arm connecting assembly.

[0013] In one embodiment, a limiting groove is further provided at one end of the piston arm away from the cylinder sleeve, the limiting groove is arranged at intervals with the sliding groove along the axial direction of the connecting shaft, and the notch of the limiting groove is opposite to the notch of the sliding groove along the radial direction of the connecting shaft; the piston arm connecting assembly includes a limiting ring, which is sleeved in the limiting groove to limit the radial displacement of each piston arm along the connecting shaft.

[0014] In this embodiment, by arranging a limit ring sleeve in the limit groove, and arranging the limit groove to be spaced apart from the slide groove along the axial direction of the connecting shaft, the radial displacement of the piston arm along the connecting shaft can be limited, thereby improving the abutment effect between the bearing and the slide groove, that is, improving the abutment effect between the slide rail and the slide groove, and further improving the reciprocating motion effect of the piston arm in the cylinder sleeve.

[0015] In one embodiment, the limiting ring is a retaining spring.

[0016] In one embodiment, the piston arm connecting assembly includes an end cover, and the end cover and the limit groove are located on the same side of the five piston arms along the axial direction of the connecting shaft; the end cover has an extension portion with an annular structure, and the extension portion is arranged around the periphery of the limit groove and covers the notch of the limit groove to limit the radial displacement of the limit ring in the limit groove along the connecting shaft.

[0017] In this embodiment, by providing an end cover and providing an extension portion to surround the periphery of the limiting groove and cover the notch of the limiting groove, the limiting effect of the radial displacement of the piston arm along the connecting shaft can be improved. At the same time, since the limiting ring is sleeved in the limiting groove, the extension portion is provided to cover the notch of the limiting groove, which can form a protective and strengthening effect on the limiting ring, and avoid the limiting ring from loosening or failing and affecting the fixing effect of the piston arm. That is, by providing the end cover, the piston arm can be fixed twice, so as to further enhance the stability of the reciprocating motion of the piston arm driven by the eccentric wheel.

[0018] In one embodiment, the extension portion is provided with a notch, and at least part of the coil of the retaining spring is fixed to the notch.

[0019] In this embodiment, by providing a notch for fixing the outer coil of the retaining spring, the working performance and life of the retaining spring can be guaranteed, thereby ensuring the limiting effect of the retaining spring on the radial displacement of the piston arm along the connecting shaft.

[0020] In one embodiment, the end cover is provided with a through hole extending axially through the connecting shaft, and the connecting shaft passes through the through hole and extends out; the piston arm connecting assembly includes a fixing member, which is located on the side of the end cover away from the piston arm along the axial direction of the connecting shaft and is fixed on the connecting shaft to limit the axial displacement of the end cover along the connecting shaft.

[0021] In this embodiment, by providing a fixing part, the axial displacement of the end cover along the connecting shaft can be limited to avoid the undesirable situation that the end cover flies outward during the rotation of the connecting shaft, thereby improving the working stability and performance of the piston arm connecting assembly.

[0022] In one embodiment, a plane bearing is provided between the end cover and the fixing member along the axial direction of the connecting shaft, and the plane bearing is sleeved on the periphery of the connecting shaft to space the end cover and the fixing member along the axial direction of the connecting shaft.

[0023] In this embodiment, by providing a plane bearing, the end cap and the fixing member can be spaced apart from each other along the axial direction of the connecting shaft, thereby avoiding friction between the end cap and the fixing member to reduce the working performance and life of the end cap and the fixing member, that is, by reducing the friction between the end cap and the fixing member through the plane bearing, the working performance and life of the piston arm connecting assembly can be improved. At the same time, by providing a plane bearing, the displacement between the end cap and the fixing member in the radial direction of the connecting shaft can be compensated, so as to further improve the working performance of the piston arm connecting assembly.

[0024] In one embodiment, a protrusion structure is provided between the end cover and the piston arm along the axial direction of the connecting shaft to limit the contact area between the end cover and the piston arm.

[0025] In this embodiment, by providing a protruding structure between the end cover and the piston arm, the contact area between the end cover and the piston arm can be reduced, so as to further reduce the friction between the end cover and the fixing member.

[0026] In one embodiment, a baffle is provided between the bearing and the slide groove, wherein the baffle is an annular structure and covers the gap between the inner ring and the outer ring of the bearing.

[0027] In this embodiment, by setting a baffle between the bearing and the slide groove, and setting the baffle to cover the gap between the inner ring and the outer ring of the bearing, the rolling element and the raceway in the bearing can be protected to prevent external impurities such as dust, gravel, and abrasive particles from invading the interior of the bearing and damaging the rolling element or the raceway. That is, by setting the baffle to protect the bearing, the working performance and life of the bearing can be improved.

[0028] The present application also provides an air compressor, comprising a motor and a piston arm connecting assembly in any of the above embodiments, wherein the eccentric wheel of the piston arm connecting assembly is transmission-connected between the motor shaft of the motor and the five piston arms of the piston arm connecting assembly, and the rotation of the motor shaft drives the eccentric wheel to rotate to drive each piston arm to reciprocate.

[0029] Because the air compressor of the present application uses the piston arm connection assembly in any of the above embodiments, the air compressor of the present application has all possible beneficial effects of the piston arm connection assembly in any of the above embodiments.

[0030] In one embodiment, the eccentric wheel has a fixed part and an eccentric part relative to each other, the fixed part is fixedly connected to the motor shaft, and the eccentric part is transmission connected to the piston arm; the motor shaft rotates to drive the fixed part to drive the eccentric part to revolve around the motor shaft, thereby driving the piston arm to reciprocate.

[0031] In this embodiment, the fixed part is fixedly connected to the motor shaft, so that the fixed part can be rotated synchronously when the motor shaft rotates. Since the eccentric part is located on one side of the fixed part, when the fixed part rotates around the motor shaft axis, the eccentric part can be driven to revolve around the motor shaft, and at this time, the piston arm connected to the eccentric part can be synchronously driven to reciprocate to achieve the effect of compressing air.

[0032] The present application also provides an air suspension system, which includes an air spring and the air compressor in any of the above embodiments, and the air compressor is used to adjust the extension and contraction state of the air spring.

[0033] Because the air suspension system of the present application uses the air compressor in any of the above embodiments, the air suspension system of the present application has all possible beneficial effects of the air compressor in any of the above embodiments.

[0034] The present application also provides a vehicle, the vehicle comprising the air suspension system in any of the above embodiments. Or, the vehicle comprising the air compressor in any of the above embodiments.

[0035] Because the vehicle of the present application uses the air suspension system in any of the above embodiments, the vehicle of the present application has all possible beneficial effects of the air suspension system in any of the above embodiments. Or, because the vehicle of the present application uses the air compressor in any of the above embodiments, the vehicle of the present application has all possible beneficial effects of the air compressor in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the appearance structure of an air compressor provided in an embodiment of the present application from a side perspective;

[0038] Figure 2 A schematic diagram of a cross-sectional structure of an air compressor from a side perspective provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the planar structure of the air compressor provided in an embodiment of the present application, with part of the structure hidden, from a side perspective;

[0040] Figure 4 A schematic structural diagram of an air compressor provided in an embodiment of the present application from a side perspective with part of the structure hidden;

[0041] Figure 5 A schematic diagram of the appearance structure of an air compressor provided in an embodiment of the present application from a side perspective;

[0042] Figure 6 A schematic diagram of a partial structure of an air compressor from a side perspective provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of the partial structure of an air compressor from a side perspective provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0045] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, 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 cannot be understood as a limitation to the present application.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "include" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0048] The present application provides a vehicle, the vehicle includes an air suspension system, the air suspension system includes an air spring and an air compressor (in Figure 1 100), the air spring is elastically connected to the vehicle body to adjust the height of the vehicle body from the ground to keep the stiffness stable. The air compressor is used to inflate the air spring.

[0049] It should be noted that in the present application specification, the air suspension system is only described as an example of an air spring and an air compressor, but the air suspension system is not limited to only including air springs and air compressors. In other embodiments of the present application, the air suspension system may also include, but is not limited to, functional structural components such as shock absorbers, controllers, sensors, and air pipes.

[0050] For example, the shock absorber can be used in conjunction with the air spring to provide cushioning for the vehicle and reduce body vibration during driving, so as to improve the stability and comfort of the vehicle when driving on rough roads.

[0051] For example, the controller is electrically connected to each functional structural component inside the air suspension system to control the coordination between each functional structural component inside the air suspension system, thereby ensuring the working effect of the air suspension system. For example, but not limited to, the controller can control the air compressor and the shock absorber to adjust the stiffness of the air spring and the damping force of the shock absorber.

[0052] Exemplarily, the sensor may be, but is not limited to, a height sensor, a vehicle body acceleration sensor, or other type of sensor, so as to be able to monitor the status of the vehicle in real time and transmit it to the vehicle controller.

[0053] Exemplarily, the air pipeline is connected between various functional structural components in the air suspension system to transmit air between various functional structural components in the air suspension system.

[0054] Please also read Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the appearance structure of the air compressor 100 provided in an embodiment of the present application from a side perspective. Figure 2 Schematic diagram of the cross-sectional structure of the air compressor 100 provided in the embodiment of the present application from a side perspective. Figure 1 and Figure 2 As shown, the air compressor 100 includes a motor 10 and a piston arm connecting assembly. The piston arm connecting assembly includes five cylinder sleeves 20, five piston arms 30 and an eccentric wheel 40. The eccentric wheel 40 of the piston arm connecting assembly is transmission-connected between the motor shaft 11 of the motor 10 and the five piston arms 30 of the piston arm connecting assembly, and the motor shaft 11 rotates to drive the eccentric wheel 40 to rotate to drive each piston arm 30 to reciprocate.

[0055] Specifically, five cylinder sleeves 20 are arranged on the periphery of the eccentric wheel 40 and are spaced from each other. One end of each piston arm 30 extends into a cylinder sleeve 20, and the other end of each piston arm 30 extends in a direction away from the cylinder sleeve 20. The eccentric wheel 40 is transmission-connected to the five piston arms 30. The rotation of the eccentric wheel 40 drives each piston arm 30 to reciprocate in the corresponding cylinder sleeve 20.

[0056] exist Figure 1 and Figure 2 In the illustrated embodiment, five cylinder sleeves 20 are arranged at intervals along the circumference of the motor shaft 11, one end of each piston arm 30 extends into a cylinder sleeve 20, and the other end of each piston arm 30 extends toward the motor shaft 11. The eccentric wheel 40 is transmission-connected between the motor shaft 11 and the five piston arms 30, and the rotation of the motor shaft 11 drives the eccentric wheel 40 to rotate to drive each piston arm 30 to reciprocate in the cylinder sleeve 20 corresponding thereto.

[0057] For example, Figure 1 and Figure 2 As shown, five piston arms 30 are arranged in a one-to-one correspondence with five cylinder sleeves 20 . It can be understood that the number of piston arms 30 is the same as the number of cylinder sleeves 20 , and corresponding to each cylinder sleeve 20 , there is one piston arm 30 extending into the cylinder sleeve 20 .

[0058] exist Figure 1 and Figure 2 In the illustrated embodiment, along the length direction of the piston arm 30, each piston arm 30 has a relative transmission end 31 and a driving end 32, the transmission end 31 of each piston arm 30 is transmission-connected to the eccentric wheel 40, and the driving end 32 of each piston arm 30 extends into a cylinder sleeve 20 respectively and forms a seal in the cylinder sleeve 20.

[0059] It can be understood that by arranging five cylinder sleeves 20 at intervals along the circumference of the motor shaft 11, the working efficiency of the entire piston arm connection assembly driving the cylinder sleeve can be improved.

[0060] That is, when the eccentric wheel 40 rotates to drive the piston arm 30 to reciprocate in the cylinder sleeve 20, an effect of compressed air is formed in the cylinder sleeve 20, and the air in the cylinder sleeve 20 can be compressed to drive the air spring to adjust the telescopic state.

[0061] Specifically, in Figure 1 and Figure 2 In the illustrated embodiment, the eccentric wheel 40 has a fixed portion 40a and an eccentric portion 40b opposite to each other, the fixed portion 40a is fixedly connected to the motor shaft 11, and the eccentric portion 40b is transmission-connected to the piston arm 30. The motor shaft 11 rotates to drive the fixed portion 40a to drive the eccentric portion 40b to revolve around the motor shaft 11, thereby driving the piston arm 30 to reciprocate.

[0062] For example, please combine Figure 1and Figure 2 See also Figure 3 , Figure 3 The schematic diagram of the plane structure of the air compressor 100 provided in the embodiment of the present application is a side view with some structures hidden. In order to clearly illustrate the rotation of the eccentric portion 40b relative to the fixed portion 40a, Figure 3 In the illustrated embodiment, the piston arm 30, the cylinder sleeve 20 and other functional structural parts in the air compressor 100 are omitted.

[0063] like Figure 1-Figure 3 As shown, when the motor shaft 11 rotates, the synchronous band pass fixing portion 40a can rotate (as shown in FIG. Figure 3 Since the eccentric portion 40b is located on one side of the fixed portion 40a, when the fixed portion 40a rotates around the axis of the motor shaft 11, the eccentric portion 40b can be driven to revolve around the motor shaft 11 (as shown in FIG. Figure 3 At this time, the piston arm 30 connected to the eccentric part 40b will be synchronously driven to reciprocate to achieve the effect of compressing air.

[0064] It should be noted that in Figure 3 In the illustrated embodiment, only one possible structural shape and structural size of the eccentric wheel 40 is used as an example for exemplary introduction, but the structural shape and structural size of the eccentric wheel 40 are not limited to this. In other embodiments of the present application, the structural shape and size of the eccentric wheel 40 can be adjusted according to actual design requirements, and the embodiments of the present application do not specifically limit this.

[0065] In one embodiment, mutually matching sliding grooves are provided between the five piston arms 30 and the eccentric wheel 40 (in Figure 4 The slide groove 50 is shown in FIG. Figure 4 The slide rail 60 is shown in the figure, and the slide rail 60 is embedded in the slide groove 50. The eccentric wheel 40 rotates and drives the slide rail 60 to slide in the slide groove 50, so as to drive each piston arm 30 to reciprocate.

[0066] For example, please combine Figure 2 See also Figure 4 , Figure 4 The following is a schematic diagram of the structure of the air compressor 100 provided in the embodiment of the present application, with some structures hidden. In order to clearly illustrate the structural position of the connecting shaft and bearings of the air compressor 100, Figure 4 In the illustrated embodiment, the motor 10 , the eccentric wheel 40 , the cylinder sleeve 20 and other possible functional components in the air compressor 100 are omitted.

[0067] like Figure 2 and Figure 4As shown, the piston arm connection assembly includes a connection shaft 70 and a bearing 80. The connection shaft 70 is fixed to the eccentric portion 40b of the eccentric wheel 40, and the connection shaft 70 extends along the axial direction of the motor shaft 11 in a direction away from the motor shaft 11. The bearing 80 is sleeved on the connection shaft 70 and is configured as a slide rail 60. The slide groove 50 is opened at one end of the five piston arms 30 away from the cylinder sleeve 20.

[0068] For example, Figure 2 and Figure 4 As shown, the eccentric wheel 40 has two opposite side surfaces 40 c along the thickness direction of the eccentric wheel 40 , and the axis of the motor shaft 11 and the axis of the connecting shaft 70 are both perpendicular to the side surface 40 c of the eccentric wheel 40 .

[0069] The fixing portion 40a of the eccentric wheel 40 is fixed to one end of the motor shaft 11, and the connecting shaft 70 is located on the side of the eccentric wheel 40 away from the motor shaft 11, and one end of the connecting shaft 70 is fixed to the eccentric portion 40b of the eccentric wheel 40. The other end of the connecting shaft 70 extends in the direction away from the motor shaft 11 along the axial direction of the motor shaft 11.

[0070] The bearing 80 is located on the side of the eccentric wheel 40 away from the motor shaft 11, and the inner ring of the bearing 80 is fixed on the connecting shaft 70, so as to form an effect that the bearing 80 is fixed to the periphery of the connecting shaft 70. The bearing 80 can be fixed to the connecting shaft 70 by an interference fit assembly method, but is not limited to it.

[0071] The driving end 31 of each piston arm 30 is provided with a groove 321, and along the length direction of the piston arm 30, the notch of the groove 321 is away from the driving end and away from the cylinder sleeve 20. The groove 321 on each piston arm 30 passes through the driving end 31 along the arrangement direction of two adjacent piston arms 30.

[0072] exist Figure 2 and Figure 4 In the illustrated embodiment, a plurality of grooves 321 are collectively configured as a slide groove 50, and the bearing 80 is configured as a slide rail 60. The bearing 80 extends into the groove 321 of each piston arm 30, which can be understood as the bearing 80 extending into the slide groove 50 and being able to rotate relative to the slide groove 50 in the slide groove 50.

[0073] It can be understood that by setting the connecting shaft 70 to be fixed to the eccentric part 40b, when the eccentric part 40b revolves around the motor shaft 11, it will synchronously drive the connecting shaft 70 and the bearing 80 sleeved on the connecting shaft 70 to revolve synchronously around the motor shaft 11. At the same time, by setting the bearing 80 to be constructed as a slide rail 60 and slide in the slide groove 50, the friction between the slide rail 60 and the slide groove 50 can be further reduced, so as to further improve the working performance and life of the piston arm connection assembly.

[0074] By arranging the bearing 80 to extend into the slide groove 50, the contact area between the bearing 80 and the two groove walls opposite to each other along the axial direction of the connecting shaft 70 can be ensured, so as to limit the axial displacement of the piston arm 30 along the connecting shaft 70, improve the reciprocating motion effect of the piston arm 30 in the cylinder sleeve 20, and further improve the air compression efficiency of the air compressor 100.

[0075] It should be noted that in Figure 4 In the illustrated embodiment, the multiple grooves 321 provided on the five piston arms 30 are collectively configured as a slide groove 50, so that the bearing 80 can slide and rotate in the slide groove 50. At this time, the structural shape and structural size of the groove 321 are both set corresponding to the structural shape and structural size of the bearing 80. The embodiment of the present application only takes one possible structural shape and size of the slide groove 50 as an example for exemplary introduction, but the structural shape and size of the slide groove 50 in the embodiment of the present application are not limited to this.

[0076] In other embodiments of the present application, the structural shape and size of the slide groove 50 can be adjusted according to actual design requirements and actual application scenarios of the piston arm connection assembly, and the embodiments of the present application do not specifically limit this.

[0077] An embodiment, such as Figure 4 As shown, a baffle is provided between the bearing 80 and the slide groove 50 . The baffle is an annular structure and covers the gap between the inner ring 81 and the outer ring 82 of the bearing 80 .

[0078] It can be understood that by providing the baffle 90 between the bearing 80 and the slide groove 50, and providing the baffle 90 to cover the gap between the inner ring 81 and the outer ring 82 of the bearing 80, the rolling element 83 and the raceway in the bearing 80 can be protected, and the external impurities such as dust, gravel, and abrasive particles can be prevented from invading the interior of the bearing 80 and damaging the rolling element 83 or rolling. That is, by providing the baffle 90 to protect the bearing 80, the working performance and life of the bearing 80 can be improved.

[0079] For an example, see Figure 5 , Figure 5 This is a schematic diagram of the appearance structure of the air compressor 100 provided in the embodiment of the present application from a side perspective. Figure 5 As shown, a limiting groove 322 is further provided at one end of the piston arm 30 facing the motor shaft 11, and the limiting groove 322 is arranged at intervals with the slide groove 50 along the axial direction of the connecting shaft 70. Exemplarily, the limiting groove 322 is arranged at intervals along the axial direction of the connecting shaft 70 on the side of the slide groove 50 away from the motor shaft 11. And the notch of the limiting groove 322 is opposite to the notch of the slide groove 50 along the radial direction of the connecting shaft 70.

[0080] That is, in Figure 5In the illustrated embodiment, the transmission end 31 of the piston arm 30 is provided with a slide groove 50 on the side facing the bearing 80, and the transmission end 31 is provided with a limit groove 322 on the side facing away from the bearing 80. In addition, along the axial direction of the connecting shaft 70, the slide groove 50 and the limit groove 322 are arranged at intervals. Along the radial direction of the connecting shaft 70, the notch of the slide groove 50 and the notch of the limit groove 322 are arranged opposite to each other.

[0081] The piston arm connection assembly includes a limiting ring 91 , which is sleeved in the limiting groove 322 to limit the radial displacement of each piston arm 30 along the connecting shaft 70 .

[0082] Specifically, the limiting ring 91 is an annular structure and is engaged in the limiting groove 322. When the limiting ring 91 of the annular structure is engaged in the limiting groove 322, a force toward the connecting shaft 70 is applied to the transmission end 31 of each piston arm 30 along the radial direction of the connecting shaft 70 to limit the displacement of each piston arm 30 in the radial direction of the connecting shaft 70.

[0083] Exemplarily, the limiting ring 91 can be, but is not limited to, a retaining ring.

[0084] It can be understood that by setting a limit ring 91 to be sleeved in the limit groove 322, and setting the limit grooves 322 to be arranged at intervals along the axial direction of the connecting shaft 70 on the side of the slide groove 50 away from the motor shaft 11, the radial displacement of the piston arm 30 along the connecting shaft 70 can be limited, thereby improving the abutment effect between the bearing 80 and the slide groove 50, that is, improving the abutment effect between the slide rail 60 and the slide groove 50, and further improving the reciprocating motion effect of the piston arm 30 in the cylinder sleeve 20.

[0085] For an example, see Figure 6 , Figure 6 This is a partial structural diagram of an air compressor 100 provided in an embodiment of the present application from a side perspective. Figure 6 In the illustrated embodiment, the piston arm connection assembly includes an end cap 92, and the end cap 92 and the limit groove 322 are located on the same side of the five piston arms 30 along the axial direction of the connecting shaft 70. Exemplarily, the end cap 92 is located on the side of the five piston arms 30 away from the motor shaft 11 along the axial direction of the connecting shaft 70.

[0086] The end cover 92 includes a cover body 921 and an extension portion 922. The extension portion 922 is continuously arranged around the outer periphery of the cover body 921 and extends along the axial direction of the connecting shaft 70 toward the motor shaft 11. Figure 6 In the illustrated embodiment, the extension portion 922 is an annular structure, which is disposed around the periphery of the limiting groove 322 and covers the notch of the limiting groove 322 to limit the radial displacement of the limiting ring 91 in the limiting groove 322 along the connecting shaft 70 .

[0087] By providing the end cover 92 and the extension portion 922 surrounding the periphery of the limiting groove 322 and covering the notch of the limiting groove 322 , the limiting effect on the radial displacement of the piston arm 30 along the connecting shaft 70 can be improved.

[0088] At the same time, since the limiting ring 91 is sleeved in the limiting groove 322, the extension portion 922 is provided to cover the notch of the limiting groove 322, which can protect and strengthen the limiting ring 91, and prevent the limiting ring 91 from loosening or failing, thereby preventing the fixing effect of the piston arm 30 from being affected. That is, by providing the end cover 92, the piston arm 30 can be fixed for a second time, so as to further enhance the stability of the reciprocating motion of the piston arm 30 driven by the eccentric wheel 40.

[0089] In one embodiment, the extension portion 922 is provided with a notch (not shown in the figure), and when the limiting ring 91 is configured as a retaining spring, at least part of the coil of the retaining spring is fixed to the notch. It can be understood that by providing a notch for fixing the outer coil of the retaining spring, the working performance and life of the retaining spring can be guaranteed, thereby ensuring the limiting effect of the retaining spring on the radial displacement of the piston arm 30 along the connecting shaft 70.

[0090] In one embodiment, the end cover 92 is provided with a through hole 923 penetrating along the axial direction of the connecting shaft 70, and the connecting shaft 70 passes through the through hole 923 and extends out. The piston arm connecting assembly includes a fixing member 93, which is located on a side of the end cover 92 away from the piston arm 30 along the axial direction of the connecting shaft 70 and fixed on the connecting shaft 70 to limit the displacement of the end cover 92 along the axial direction of the connecting shaft 70.

[0091] It can be understood that by setting the fixing part 93, the axial displacement of the end cover 92 along the connecting shaft 70 can be limited to avoid the undesirable situation that the end cover 92 flies outward during the process that the motor shaft 11 rotates and drives the connecting shaft 70 to revolve around the motor shaft 11, thereby improving the working stability and performance of the piston arm connecting assembly.

[0092] In one embodiment, the fixing member 93 may be, but is not limited to, a nut. A thread matching the nut is provided on the periphery of the portion of the connecting shaft 70 that passes through the end cover 92 and extends outward, so that the nut can be fixed to the periphery of the connecting shaft 70 to limit the axial displacement of the end cover along the connecting shaft 70.

[0093] In one embodiment, a plane bearing 94 is provided between the axial end cover 92 and the fixing member 93 along the connecting shaft 70 . The plane bearing 94 is sleeved on the outer periphery of the connecting shaft 70 to space the end cover 92 and the fixing member 93 along the axial direction of the connecting shaft 70 .

[0094] For example, in Figure 6In the embodiment shown, a flange 9231 is protruded from the inner wall of the through hole 923. The flange 9231 is an annular structure, and the connecting shaft 70 passes through the flange 9231 and extends outward. Along the axial direction of the connecting shaft 70, the flange 9231 and the extension portion 922 are located on the same side of the cover body 921.

[0095] One end of the plane bearing 94 along the axial direction of the connecting shaft 70 abuts against the surface of the flange 9231 facing the fixing member 93, and the other end of the plane bearing 94 abuts against the surface of the fixing member 93 facing the flange 9231. In the axial direction of the connecting shaft 70, the height of the plane bearing 94 is greater than the distance between the fixing member 93 and the end cover 92, so that the plane bearing 94 can separate the end cover 92 and the fixing member 93.

[0096] That is, along the axial direction of the connecting shaft 70 , the height of the plane bearing 94 is greater than the distance between the fixing member 93 and the cover body 921 , so that a gap is formed between the fixing member 93 and the end cover 92 in the axial direction of the connecting shaft 70 .

[0097] By providing the plane bearing 94, the end cover 92 and the fixing member 93 can be spaced apart from each other along the axial direction of the connecting shaft 70, so as to avoid friction between the end cover 92 and the fixing member 93, thereby preventing the end cover 92 and the fixing member 93 from reducing the working performance and life of the end cover 92 and the fixing member 93. That is, by reducing the friction between the end cover 92 and the fixing member 93 through the plane bearing 94, the working performance and life of the piston arm connecting assembly can be improved.

[0098] At the same time, by providing the plane bearing 94, the displacement between the end cover 92 and the fixing member 93 in the radial direction of the connecting shaft 70 can be compensated, so as to further improve the working performance of the piston arm connecting assembly.

[0099] In one embodiment, a protrusion structure 924 is provided between the end cover 92 and the piston arm 30 along the axial direction of the connecting shaft 70 to limit the contact area between the end cover 92 and the piston arm 30. Figure 6 In the illustrated embodiment, the protruding structure is protruding from the surface of the cover 921 facing the fixing member 93 , and there are multiple protruding structures.

[0100] It should be noted that in other embodiments of the present application, the protrusion structure can also be protruded on the surface of the fixing member facing the end cover 92. And the structural shape, structural size and arrangement number of the protrusion structure can be adjusted according to actual design requirements, and the embodiments of the present application do not specifically limit this.

[0101] By providing a protruding structure 924 between the end cover 92 and the piston arm 30 , the contact area between the end cover 92 and the piston arm 30 can be reduced, so as to further reduce the friction between the end cover 92 and the fixing member 93 .

[0102] The air compressor of the existing air suspension system can drive a limited number of piston arms to work simultaneously, resulting in low air compression efficiency and a large overall volume of the piston arm connecting assembly driving the piston arm to compress air in the cylinder sleeve.

[0103] The piston arm connecting assembly of the present application is connected between the five piston arms 30 and the motor shaft 11 by means of an eccentric wheel 40, and five cylinder sleeves 20 are arranged at intervals along the periphery of the eccentric wheel, so that when the eccentric wheel 40 rotates, the eccentric wheel 40 can drive the five piston arms 30 to work at the same time, so as to improve the air compression efficiency of the piston arm connecting assembly through the piston arm in the cylinder sleeve.

[0104] Since the number of the cylinder sleeves 20 and the corresponding piston arms 30 arranged at intervals is five, the air compression efficiency of the piston arm connecting assembly in the cylinder sleeve 20 through the piston arms 30 can be further improved to meet work requirements.

[0105] At the same time, since the five cylinder sleeves 20 are arranged at intervals, the extension directions of the five piston arms 30 are located in the same plane, so the overall volume of the piston arm connecting assembly can be reduced, achieving the effect of miniaturized design of the piston arm connecting assembly.

[0106] Because the air compressor 100 of the present application uses the piston arm connection assembly in any of the above embodiments, the air compressor 100 of the present application has all possible beneficial effects of the piston arm connection assembly in any of the above embodiments.

[0107] Because the air suspension system of the present application uses the air compressor 100 in any of the above embodiments, the air suspension system of the present application has all possible beneficial effects of the air compressor 100 in any of the above embodiments.

[0108] Because the vehicle of the present application uses the air suspension system in any of the above-mentioned embodiments, the vehicle of the present application has all possible beneficial effects of the air suspension system in any of the above-mentioned embodiments.

[0109] Or, because the vehicle of the present application uses the air compressor 100 in any of the above embodiments, the vehicle of the present application has all possible beneficial effects of the air compressor 100 in any of the above embodiments.

[0110] It should be noted that in Figure 2-Figure 6 In the embodiment shown, only the manner in which the eccentric wheel 40 and the piston arm 30 cooperate with each other through the connecting shaft 70 and the bearing 80 to achieve transmission connection is used as an example for illustrative description, but the manner in which the eccentric wheel 40 drives the piston arm 30 to reciprocate is not limited to this. In other embodiments of the present application, the transmission connection between the eccentric wheel 40 and the five piston arms 30 can also be achieved by other means.

[0111] For an example, see Figure 7 , Figure 7 This is a partial structural diagram of an air compressor 100 provided in an embodiment of the present application from a side perspective. Figure 7 As shown, the slide rail 60 is disposed around the outer circumference of the eccentric wheel 40 , and the slide groove 50 is opened at one end of the five piston arms 30 facing the motor shaft 11 .

[0112] It can be understood that by setting the slide rail 60 to surround the eccentric wheel 40 and setting the slide groove 50 to be opened at one end of the five piston arms 30 facing the motor shaft 11, the eccentric wheel 40 can drive the slide rail 60 to slide in the slide groove 50, and then can synchronously drive the five piston arms 30 to work.

[0113] At the same time, the cooperation between the slide rail 60 and the slide groove 50 can improve the air compression efficiency of the air compressor 100 while reducing the friction generated by the mutual movement between the internal structures of the piston arm connecting assembly to improve the working performance and life of the piston arm connecting assembly.

[0114] It should be noted that in Figure 7 In the embodiment shown, only one possible structural shape and size of the slide groove 50 and the slide rail 60 is used as an example for exemplary description, but the structural shape and size of the slide rail 60 and the slide groove 50 in the embodiment of the present application are not limited to this. In other embodiments of the present application, the structural shape and size of the slide rail 60 and the slide groove 50 can be adjusted according to actual design requirements. The embodiment of the present application does not specifically limit this.

[0115] In one embodiment, an elastic member (not shown in the figure) may be further provided between the eccentric wheel 40 and the piston arm 30. The elastic member is elastically connected between the eccentric wheel 40 and the piston arm 30 along the radial direction of the motor shaft 11, and is used to cooperate with the eccentric wheel 40 to drive the driving end 32 of the piston arm 30 to reciprocate in the cylinder sleeve 20.

[0116] Exemplarily, when the eccentric portion 40b of the eccentric wheel 40 rotates around the motor shaft 11 toward the piston arm 30, the eccentric portion 40b drives the piston arm 30 to move toward the cylinder sleeve 20 and compress the air. When the eccentric portion 40b rotates around the motor shaft 11 in a direction away from the piston arm 30, the elastic member can provide a driving force for the piston arm 30 to move in a direction away from the cylinder sleeve 20.

[0117] It can be understood that while the eccentric wheel 40 simultaneously drives the five piston arms 30 to reciprocate, by providing an elastic member, the elastic member and the eccentric wheel 40 work together to improve the efficiency of the eccentric wheel 40 in driving the piston arms 30 to reciprocate, thereby improving the air compression efficiency of the piston arm connecting assembly.

[0118] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0120] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A piston arm connection assembly, characterized in that: It includes five cylinder sleeves, five piston arms and an eccentric wheel. The five cylinder sleeves are arranged on the periphery of the eccentric wheel and are spaced apart from each other. One end of each piston arm extends into a cylinder sleeve, and the other end of each piston arm extends in a direction away from the cylinder sleeve. The eccentric wheel is transmission-connected with the five piston arms. The eccentric wheel rotates to drive each piston arm to reciprocate in the corresponding cylinder sleeve.

2. The piston arm connection assembly according to claim 1, characterized in that: Mutually matched slide grooves and slide rails are provided between the five piston arms and the eccentric wheel, and the slide rails are embedded in the slide grooves; The eccentric wheel rotates and drives the slide rail to slide in the slide groove, so as to drive each piston arm to reciprocate.

3. The piston arm connection assembly according to claim 2, characterized in that: The slide rail is arranged around the outer peripheral surface of the eccentric wheel, and the slide groove is opened at one end of the five piston arms away from the cylinder sleeve.

4. The piston arm connection assembly according to claim 2, characterized in that: The piston arm connecting assembly includes a connecting shaft and a bearing. The connecting shaft is fixed to the eccentric wheel. The bearing is sleeved on the connecting shaft and is constructed as the slide rail. The slide groove is opened at one end of the five piston arms away from the cylinder sleeve.

5. The piston arm connection assembly according to claim 4, characterized in that: A limiting groove is further provided at one end of the piston arm away from the cylinder sleeve, wherein the limiting groove is spaced apart from the slide groove along the axial direction of the connecting shaft, and the notch of the limiting groove is opposite to the notch of the slide groove along the radial direction of the connecting shaft; The piston arm connection assembly comprises a limiting ring, and the limiting ring is sleeved in the limiting groove to limit the radial displacement of each piston arm along the connecting shaft.

6. The piston arm connection assembly according to claim 5, characterized in that: The piston arm connection assembly comprises an end cover, and the end cover and the limiting groove are located on the same side of the five piston arms along the axial direction of the connecting shaft; The end cover has an extension portion of an annular structure, and the extension portion is arranged around the periphery of the limiting groove and covers the notch of the limiting groove to limit the radial displacement of the limiting ring in the limiting groove along the connecting shaft.

7. The piston arm connection assembly according to claim 6, characterized in that: The end cover is provided with a through hole penetrating along the axial direction of the connecting shaft, and the connecting shaft passes through the through hole and extends out; The piston arm connection assembly includes a fixing member, which is located on a side of the end cover away from the piston arm along the axial direction of the connecting shaft and fixed on the connecting shaft to limit the axial displacement of the end cover along the connecting shaft.

8. The piston arm connection assembly according to claim 7, characterized in that: A plane bearing is provided between the end cover and the fixing member along the axial direction of the connecting shaft, and the plane bearing is sleeved on the outer periphery of the connecting shaft to space the end cover and the fixing member along the axial direction of the connecting shaft.

9. The piston arm connection assembly according to claim 6, characterized in that: A protrusion structure is provided between the end cover and the piston arm along the axial direction of the connecting shaft to limit the contact area between the end cover and the piston arm.

10. The piston arm connection assembly according to any one of claims 4 to 9, characterized in that: A baffle is provided between the bearing and the slide groove. The baffle is an annular structure and covers the gap between the inner ring and the outer ring of the bearing.

11. An air compressor, characterized in that: It comprises a motor and a piston arm connecting assembly as described in any one of claims 1-10, wherein the eccentric wheel of the piston arm connecting assembly is transmission-connected between the motor shaft of the motor and the five piston arms of the piston arm connecting assembly, and the motor shaft rotates to drive the eccentric wheel to rotate so as to drive each of the piston arms to reciprocate.

12. The air compressor according to claim 11, characterized in that The eccentric wheel has a fixed portion and an eccentric portion opposite to each other, the fixed portion is fixedly connected to the motor shaft, and the eccentric portion is drivingly connected to the piston arm; The motor shaft rotates to drive the fixing part to drive the eccentric part to revolve around the motor shaft, so as to drive the piston arm to reciprocate.

13. An air suspension system, characterized in that: The air suspension system comprises an air spring and an air compressor as claimed in any one of claims 11 or 12, wherein the air compressor is used to adjust the extension and contraction state of the air spring.

14. A vehicle, characterized in that: The vehicle comprises the air suspension system according to claim 13; or, the vehicle comprises the air compressor according to any one of claims 11 or 12.

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