Pump device, suspension system and vehicle

Abstract

The invention discloses a pump device, a suspension system and a vehicle. The pump device comprises a pump assembly and a liquid storage pot. The pump assembly is provided with a first flow channel, a second flow channel, an oil inlet and an oil outlet, an outlet of the first flow channel and an inlet of the second flow channel are suitable for being communicated with a hydraulic pipeline of the suspension system, the oil inlet is communicated with the oil outlet, and the oil outlet is communicated with the inlet of the first flow channel; the liquid storage pot is connected with the pump assembly and communicates with the oil inlet and an outlet of the second flow channel. According to the pump device, the liquid storage pot and the pump assembly of the suspension system are integrated, so that part of parts of the suspension system are compact in structure and small in occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a pump device, a suspension system and a vehicle. Background Art

[0002] At present, many suspension systems use hydraulic oil as the working medium for active adjustment, and the adjustment function is achieved through the flow of hydraulic oil in the hydraulic pipeline and the change of pressure. The suspension system usually includes components such as a fluid storage tank, a pump, a pipeline, and a valve. The current suspension system has multiple components with scattered structures and occupies a large space. Summary of the invention

[0003] The object of the present invention is to provide a pump device, a suspension system and a vehicle, which can solve the problem of dispersed structure of components of the suspension system.

[0004] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides a pump device, comprising:

[0006] A pump assembly having a first flow channel, a second flow channel, an oil inlet and an oil outlet, wherein the outlet of the first flow channel and the inlet of the second flow channel are suitable for communicating with a hydraulic pipeline of a suspension system, the oil inlet is communicated with the oil outlet, and the oil outlet is communicated with the inlet of the first flow channel;

[0007] A liquid storage pot is connected to the pump assembly, and the liquid storage pot is communicated with the oil inlet and the outlet of the second flow channel.

[0008] In one embodiment, the outlet of the first flow channel and the inlet of the second flow channel are shared, and the outlet of the second flow channel and the inlet of the first flow channel are spaced apart.

[0009] In one embodiment, the pump assembly includes a pump member and a support member, the pump member is connected to the support member, the oil inlet and the oil outlet are arranged on the pump member, and the first flow channel and the second flow channel are arranged in the support member.

[0010] In one embodiment, the pump device also includes a reflux valve, the support member has a plurality of channels, the reflux valve is accommodated in one of the channels, the reflux valve is suitable for switching between a first state and a second state, in the first state at least part of the channels constitutes the first flow channel, in the second state at least part of the channels constitutes the second flow channel, and both the first flow channel and the second flow channel pass through the reflux valve.

[0011] In one embodiment, the pump device further comprises an accumulator, wherein the accumulator is connected to the support member, the accumulator is in communication with the first flow channel and the second flow channel, and the accumulator is suitable for absorbing pressure impact of the liquid in the first flow channel and the second flow channel.

[0012] In one embodiment, the pump device further comprises a pressure sensor, wherein the pressure sensor is connected to the support member, the pressure sensor is in communication with the first flow channel, and the pressure sensor is suitable for detecting the pressure at the outlet of the first flow channel.

[0013] In one embodiment, the pump device further comprises a diverter, wherein the diverter is connected to the support member, the diverter is communicated with an outlet of the second flow channel, and the diverter is suitable for reducing the impact pressure of the liquid in the liquid storage pot.

[0014] In one embodiment, the pump device further comprises a driving motor and a noise reduction member, wherein the driving motor is connected to the supporting member, and the noise reduction member covers the driving motor and is connected to the supporting member.

[0015] In one embodiment, the pump device further comprises a temperature sensor, wherein the temperature sensor is connected to the liquid storage pot, and the temperature sensor is suitable for detecting the temperature of the liquid in the liquid storage pot.

[0016] In a second aspect, the present invention provides a suspension system, comprising a pump device as described in any one of the various embodiments of the first aspect.

[0017] In a third aspect, the present invention provides a vehicle comprising the suspension system described in various embodiments of the second aspect.

[0018] The pump device of the present invention is connected with the pump assembly and the liquid reservoir, and the outlet of the second flow channel and the oil inlet of the pump assembly are connected with the liquid reservoir, so that the hydraulic oil in the liquid reservoir can flow to the hydraulic pipeline of the suspension system through the oil inlet, the oil outlet and the first flow channel in sequence, and can also flow back to the liquid reservoir from the second flow channel. When the hydraulic oil flows in the first flow channel, the pump device corresponds to a process of rising and building up pressure, and when the hydraulic oil flows in the second flow channel, the pump device corresponds to a process of falling and unloading pressure. The pump device of the present invention can complete the transportation and recovery of hydraulic oil, and is convenient for collecting hydraulic oil. The pump device of the present invention has the functions of building up pressure and unloading pressure at the same time. The two flow channels are both arranged in the pump assembly, and the pump device of the present invention integrates the liquid reservoir and the pump assembly of the suspension system, so that some components of the suspension system are compact in structure and occupy less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a perspective view of a pump device according to an embodiment;

[0021] Figure 2 is a partial perspective view of a pump device according to an embodiment;

[0022] Figure 3 is a partial cross-sectional view of a pump assembly of one embodiment;

[0023] Figure 4 is a partial cross-sectional view of a pump assembly according to another embodiment;

[0024] Figure 5 is a cross-sectional view of a reflux valve according to an embodiment;

[0025] Figure 6 is a cross-sectional view of a pump member of an embodiment;

[0026] Figure 7 It is a cross-sectional view of a pump member according to another embodiment.

[0027] Description of reference numerals:

[0028] 100-pump device, 10-pump assembly, 11-support, 111-adapter, 112-first channel, 1121-first sub-channel, 1122-second sub-channel, 1123-third sub-channel, 113-accommodating channel, 114-second channel, 115-third channel, 116-first surface, 117-second surface, 12-return valve, 121-fourth sub-channel, 122-fifth sub-channel, 1231-outer valve seat, 1232-first spring, 1233-valve core, 1241-second spring, 1242 -steel ball, 1243-inner valve seat, 125-first oil channel outlet, 126-second oil channel outlet, 13-diverter, 14-accumulator, 15-pressure sensor, 20-liquid storage pot, 30-temperature sensor, 40-drive motor, 50-pump part, 51-seat body, 52-end cover, 53-sealing ring, 531-main body, 532-sealing part, 54-oil inlet, 541-filter, 55-oil outlet, 561-first sub-oil channel, 562-second sub-oil channel, 57-gear, 58-floating sleeve, 60-noise reduction part. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0032] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] For reference Figure 1 The present invention provides a suspension system, the suspension system includes a pump device 100. The suspension system also includes a hydraulic pipeline, and the pump device 100 is connected to the hydraulic pipeline. The working mode of the suspension system of the present invention includes a first state and a second state. Specifically, the first state is a working mode in which the suspension system of the vehicle rises in a vertical direction relative to the ground, that is, a working mode in which the pump device 100 builds up pressure; the second state is a working mode in which the suspension system of the vehicle descends in a vertical direction relative to the ground, that is, a working mode in which the pump device 100 unloads pressure.

[0034] For reference Figure 1 The present invention provides a pump device 100, including a pump assembly 10 and a liquid reservoir 20, the pump assembly 10 has a first flow channel, a second flow channel, an oil inlet 54 and an oil outlet 55, the outlet of the first flow channel and the inlet of the second flow channel are suitable for communicating with the hydraulic pipeline of the suspension system, the oil inlet 54 is communicated with the oil outlet 55, and the oil outlet 55 is communicated with the inlet of the first flow channel; the liquid reservoir 20 is connected to the pump assembly 10, and the liquid reservoir 20 is communicated with the outlet of the second flow channel and the oil inlet 54.

[0035] Optionally, the material of the liquid storage pot 20 may be metal material or plastic material, etc. The metal material may be aluminum alloy, stainless steel, etc., without limitation. The liquid storage pot 20 is suitable for storing hydraulic oil.

[0036] The oil inlet 54 and the oil outlet 55 are connected. Specifically, when the suspension system of the vehicle rises, the pump device 100 builds up pressure, and the suspension pump device 100 sucks the hydraulic oil out of the liquid reservoir 20. The hydraulic oil passes through the oil inlet 54, the oil outlet 55, and the first flow channel from the liquid reservoir 20 to the hydraulic system of the suspension system; when the suspension system of the vehicle descends, the pump device 100 releases the pressure, and the hydraulic oil flows back to the liquid reservoir 20 through the pump device 100. The hydraulic oil passes directly to the liquid reservoir 20 through the second flow channel, which is convenient for collecting the hydraulic oil. The pump device 100 of the present invention has the functions of building up pressure and releasing pressure at the same time. Both flow channels are arranged in the pump assembly 10, and the pump device 100 of the present invention integrates the liquid reservoir 20 and the pump assembly 10 of the suspension system, so that some parts of the suspension system have a compact structure and occupy less space.

[0037] In one embodiment, the outlet of the first flow channel and the inlet of the second flow channel are shared, and the outlet of the second flow channel and the inlet of the first flow channel are spaced apart.

[0038] The outlet of the first flow channel and the inlet of the second flow channel are shared, so that there is only one channel when the pump assembly 10 is connected to the hydraulic pipeline, that is, the first flow channel and the second flow channel are partially shared in the first state and the second state, which is beneficial to improving the internal integration of the pump assembly 10.

[0039] For reference Figures 1 to 3 and Figure 6 The pump assembly 10 includes a pump member 50 and a support member 11 , the pump member 50 is connected to the support member 11 , an oil inlet 54 and an oil outlet 55 are arranged on the pump member 50 , and a first flow channel and a second flow channel are arranged in the support member 11 .

[0040] Specifically, the support member 11 and the liquid storage pot 20 are connected to the outlet of the second flow channel and the inlet of the first flow channel. In the first state, the hydraulic oil flows out of the liquid storage pot 20 and passes through the first flow channel to the outside of the support member 11; in the second state, the hydraulic oil flows from the outside of the support member 11 into the second flow channel and returns to the liquid storage pot 20.

[0041] The material of the support member 11 can be cast iron, cast steel, stainless steel, copper, etc., without limitation.

[0042] Optionally, the liquid storage pot 20 is connected to the support member 11, and the connection method can be screw connection, clamping connection, welding, etc., without limitation.

[0043] The connection between the pump member 50 and the support member 11 can be a threaded connection, and a sealing member is also arranged between the pump member 50 and the support member 11. Optionally, the sealing member can be an O-ring. Specifically, the O-ring can be a UHSO-ring, a UHPO-ring, a UNO-ring, a DHO-ring, a piston rod O-ring, a high temperature resistant O-ring, a high pressure resistant O-ring, a corrosion resistant O-ring, a wear resistant O-ring, etc., without limitation.

[0044] The pump member 50 is provided to pump the hydraulic oil in the liquid storage pot 20 into the interior of the pump assembly 10 to realize the flow of the hydraulic oil.

[0045] For reference Figure 6 and Figure 7 Optionally, the pump member 50 includes a seat body 51, an end cover 52 and a sealing ring 53, the sealing ring 53 is arranged between the seat body 51 and the end cover 52, and the seat body 51 is provided with an oil inlet 54 and an oil outlet 55 which are arranged at intervals, the oil inlet 54 is connected to the liquid storage pot 20, and the oil outlet 55 is connected to the inlet of the first flow channel of the support member 11.

[0046] The material of the seat body 51 can be stainless steel, cast iron, cast steel, copper, aluminum alloy, etc., without limitation.

[0047] The material of the end cover 52 can be gray cast iron (HT200), stainless steel, synthetic rubber, fluororubber, butyl rubber, etc., without limitation.

[0048] The seat body 51 and the end cover 52 may be connected by welding, bonding, clamping, bolting, etc., without limitation, and the oil passage is sealed between the seat body 51 and the end cover 52 by a sealing retaining ring 53 .

[0049] For reference Figure 7 Optionally, the pump component 50 further includes a filter screen 541 , which is disposed inside the pump component 50 . The filter screen 541 is disposed opposite to the oil inlet 54 , and the filter screen 541 is suitable for limiting the cleanliness of the hydraulic oil entering the pump component 50 .

[0050] Optionally, a pump oil passage is provided inside the pump member 50 , and the oil inlet 54 and the oil outlet 55 are both connected to the pump oil passage.

[0051] The oil inlet 54 is connected to the liquid storage pot 20. Relative to the pump oil passage, the oil inlet 54 is located at the pump front oil passage, which is a low-pressure chamber. The oil outlet 55 is connected to the inlet of the first flow passage of the support member 11. Relative to the oil passage inside the pump member 50, the oil outlet 55 is located at the pump rear oil passage, which is a high-pressure chamber.

[0052] The oil passage inside the pump member 50 includes a first sub-oil passage 561 and a second sub-oil passage 562. The first sub-oil passage 561 is a low-pressure chamber oil passage, which is connected to the oil inlet 54, and the second sub-oil passage 562 is a high-pressure chamber oil passage, which is connected to the oil outlet 55. The first sub-oil passage 561 and the second sub-oil passage 562 are suitable for balancing the pressure of the high-pressure chamber oil passage below the floating sleeve 58, preventing the floating sleeve 58 from moving up and down, ensuring the smooth rotation of the gear 57, stably building up pressure, and reducing internal leakage of the pump member 50.

[0053] For reference Figure 6 Optionally, the pump member 50 further includes a gear 57 and a floating sleeve 58. The base 51 and the end cover 52 of the pump member 50 enclose a receiving space, and the gear 57 and the floating sleeve 58 are received in the receiving space. The gear 57 is in surface contact with the inner wall of the base 51 away from the end cover 52. The end face of the gear 57 away from the base 51 is in surface contact with the floating sleeve 58, and the end face of the floating sleeve 58 away from the gear 57 is in surface contact with the sealing retainer 53. The base 51 and the end cover 52 are connected by bolts. When the bolts are tightened, the end cover 52 presses the sealing retainer 53, the floating sleeve 58, and the gear 57 onto the base 51.

[0054] According to the tooth surface type and the number of stages of the gear 57 , the pump element 50 can be a gear 57 type such as a straight tooth, a helical tooth, a herringbone tooth, or a circular arc tooth, or a pump element 50 type of a single stage or a multi-stage.

[0055] For reference Figure 7 Optionally, the sealing ring 53 includes a main body 531 and a sealing portion 532, the sealing portion 532 is in a ring shape with the ends spaced apart, the main body 531 is in a ring shape connected end to end, the main body 531 is sleeved with the sealing portion 532 and the two ends of the sealing portion 532 are connected to the main body 531.

[0056] The sealing retaining ring 53 is an integrated structure, that is, an integrated structure prepared by an integrated process. Specifically, the integrated process may be injection molding, casting, etc., without limitation.

[0057] Specifically, the shape of the sealing portion 532 may be an “m”-like shape.

[0058] The sealing ring 53 covers the first sub-oil passage 561 and the second sub-oil passage 562 from the outside to prevent internal leakage. At the same time, the sealing ring 53 separates the first sub-oil passage 561 and the second sub-oil passage 562 to prevent internal leakage caused by the high-pressure chamber and the low-pressure chamber being connected.

[0059] The liquid reservoir 20 and the pump member 50 are both connected to the support member 11, which improves the integration of the pump device 100 and the suspension system. At the same time, the pump member 50 is arranged to enable the hydraulic oil to flow from the liquid reservoir 20 through the oil inlet 54 and the oil outlet 55 of the pump member 50 to the first flow channel.

[0060] For reference Figures 1 to 3The pump device 100 also includes a reflux valve 12. The support member 11 has a plurality of channels. The reflux valve 12 is accommodated in one of the channels. The reflux valve 12 is suitable for switching between a first state and a second state. In the first state, at least part of the channels constitute a first flow channel. In the second state, at least part of the channels constitute a second flow channel. Both the first flow channel and the second flow channel pass through the reflux valve 12.

[0061] The material of the reflux valve 12 can be metal, plastic, etc. Specifically, the metal material can be copper, aluminum alloy, stainless steel, etc., and the plastic material can be high-strength plastic, etc., without limitation.

[0062] The connection method between the reflux valve 12 and the support member 11 can be welding, screw connection, clamping connection, etc., without limitation.

[0063] Optionally, the first state is a working mode in which the vehicle's pump device 100 builds up pressure, and the hydraulic oil flows from the liquid storage pot 20 to the outside of the pump device 100; the second state is a working mode in which the vehicle's pump device 100 unloads pressure, and the hydraulic oil self-swivel joint 111 flows from the outside of the pump device 100 to the liquid storage pot 20, so as to facilitate the collection of the hydraulic oil.

[0064] The support member 11 provides an oil passage for the lifting and lowering of the suspension system of the vehicle.

[0065] The return valve 12 automatically switches the corresponding oil passage according to the change of the position of the high and low pressure chambers when the suspension system of the vehicle is lifted or lowered.

[0066] For reference Figure 4 In one embodiment, the support member 11 includes a first surface 116 and a second surface 117 that are opposite to each other. The first surface 116 is provided with an inlet of the second flow channel, and the second surface 117 is provided with an outlet of the second flow channel and an inlet of the first flow channel.

[0067] The support member 11 is provided with an adapter 111 , which is in communication with the inlet of the second flow channel and the outlet of the first flow channel. The adapter 111 , the inlet of the second flow channel and the outlet of the first flow channel are arranged on the first surface 116 .

[0068] The adapter 111 is connected to the outside of the pump device 100. The adapter 111 may be a threaded port, which is convenient for connecting with external pipes and the like and conveying hydraulic oil. The adapter 111 may be sealed with a conical surface. The inner wall surface of the adapter 111 may be a conical or diffuse cone. The pipes and the like connected to the adapter 111 are correspondingly set to diffuse cones or conical shapes. When pressure is applied between the two conical surfaces, the diffuse cone surface will be compressed, reducing its size, so that it fits completely with the conical surface and forms a sealing area, so that the adapter 111 and the external pipes and the like are tightly connected to prevent leakage of hydraulic oil during the conveying process.

[0069] The first flow channel and the second flow channel are suitable for communicating with the return valve 12 and the liquid reservoir 20 of the pump device 100. In the first state, the hydraulic oil flows from the liquid reservoir 20 through the first flow channel to the adapter 111. In the second state, the hydraulic oil flows from the swivel 111 to the liquid reservoir 20 through the second flow channel.

[0070] The inlet of the second flow channel is opened on the first surface 116, and the outlet of the second flow channel and the inlet of the first flow channel are opened on the second surface 117, which can extend the flow path of the hydraulic oil inside the support member 11 and prevent the hydraulic oil from blocking the channel inside the support member 11.

[0071] For reference Figure 4 and Figure 5 In one embodiment, the multiple channels include a first channel 112 and a receiving channel 113 that are connected to each other. The return valve 12 is received in the receiving channel 113. The first flow channel and the second flow channel share the first channel 112. The end of the first channel 112 away from the receiving channel 113 is the inlet of the second flow channel and the outlet of the first flow channel.

[0072] The first flow channel and the second flow channel share the first channel 112, and the first channel 112 is connected to the adapter 111, so that the hydraulic oil flows into or out of the support member 11 through the first channel 112 in both the second state and the first state, which is beneficial to simplify the internal structure of the support member 11 and facilitate production.

[0073] For reference Figure 3 In one embodiment, the first channel 112 includes a first sub-channel 1121, a second sub-channel 1122 and a third sub-channel 1123 that are connected to each other. Any two adjacent ones of the first sub-channel 1121, the second sub-channel 1122 and the third sub-channel 1123 have an angle, and the end of the third sub-channel 1123 away from the second sub-channel 1122 is the entrance of the second flow channel.

[0074] Specifically, the first sub-channel 1121 and the second sub-channel 1122 have an included angle, and the second sub-channel 1122 and the third sub-channel 1123 have an included angle, and the included angle may be 80°, 90°, 100°, etc.

[0075] One end of the third sub-channel 1123 away from the second sub-channel 1122 is in communication with the adapter 111 .

[0076] The first sub-channel 1121 , the second sub-channel 1122 and the third sub-channel 1123 are provided to increase the length of the first channel 112 , thereby increasing the flow path of the hydraulic oil inside the support member 11 and preventing the hydraulic oil from blocking the flow channel.

[0077] For reference Figure 1 and Figure 3In one embodiment, the pump assembly 10 further includes an accumulator 14, which is connected to the support member 11, and the accumulator 14 is in communication with the first flow channel and the second flow channel, and the accumulator 14 is suitable for absorbing pressure shocks of the liquid in the first flow channel and the second flow channel.

[0078] Specifically, the accumulator 14 is disposed at the connection between the first sub-channel 1121 and the second sub-channel 1122 .

[0079] The accumulator 14 may be a mechanical accumulator, a gas accumulator, a hydraulic accumulator, etc., without limitation.

[0080] The energy accumulator 14 and the support member 11 may be connected by welding, clamping, screwing, etc., without limitation.

[0081] Since the pump device 100 builds up a relatively high pressure, an accumulator 14 is integrated on the support member 11, and the accumulator 14 is arranged at the connection between the first sub-channel 1121 and the second sub-channel 1122, that is, the position of the high-pressure chamber oil channel during the pressure building process, for absorbing high-pressure shocks to ensure the stability of the pressure building process and protect system components from instantaneous ultra-high pressure shocks.

[0082] For reference Figure 1 and Figure 5 In one embodiment, the pump assembly 10 further includes a pressure sensor 15, the pressure sensor 15 is connected to the support member 11, the pressure sensor 15 is communicated with the first flow channel, and the pressure sensor 15 is suitable for detecting the pressure at the outlet of the first flow channel.

[0083] Specifically, the pressure sensor 15 is disposed at the connection between the first sub-channel 1121 and the second sub-channel 1122 .

[0084] The pressure sensor 15 can be a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor, a piezoelectric pressure sensor, etc., without limitation.

[0085] The pressure sensor 15 and the support member 11 may be connected by welding, clamping, screwing, etc., without limitation.

[0086] A pressure sensor 15 is integrated on the support member 11 for detecting the pressure at the outlet of the oil passage of the suspension control pump assembly.

[0087] For reference Figure 4 and Figure 5In one embodiment, the plurality of channels further include a second channel 114 and a third channel 115 which are spaced apart from each other. The second channel 114 and the third channel 115 are both connected to the receiving channel 113. The first channel 112, the reflux valve 12 and the third channel 115 form a first flow channel. The first channel 112, the reflux valve 12 and the second channel 114 form a second flow channel. An end of the third channel 115 away from the receiving channel 113 is an inlet of the first flow channel, and an end of the second channel 114 away from the receiving channel 113 is an outlet of the second flow channel.

[0088] One end of the second channel 114 away from the receiving channel 113 and one end of the third channel 115 away from the receiving channel 113 are both connected to the liquid reservoir 20. Specifically, the flow path of the hydraulic oil in the second flow channel is: adapter 111-first channel 112-return valve 12-second channel 114-liquid reservoir 20; the flow path of the hydraulic oil in the first flow channel is: liquid reservoir 20-third channel 115-return valve 12-first channel 111-adapter 111.

[0089] In one embodiment, the reflux valve 12 is provided with a fourth sub-channel 121 and a fifth sub-channel 122, the fourth sub-channel 121 is connected to the first channel 112 and the second channel 114, and the fifth sub-channel 122 is connected to the first channel 112 and the third channel 115; the reflux valve 12 is also provided with a switch, which is suitable for switching the connection between the fourth sub-channel 121 or the fifth sub-channel 122.

[0090] Specifically, the flow path of the hydraulic oil in the second flow channel is: adapter 111-first channel 112-fourth sub-channel 121-second channel 114-liquid storage pot 20; the flow path of the hydraulic oil in the first flow channel is: liquid storage pot 20-third channel 115-fifth sub-channel 122-first channel 111-adapter 111.

[0091] For reference Figure 5 In one embodiment, the switch includes a first switch and a second switch, and the first switch and the second switch are accommodated in the reflux valve 12.

[0092] Optionally, the first switch is a sliding valve mechanism, and the first switch includes an outer valve seat 1231 , a first spring 1232 , and a valve core 1233 .

[0093] Optionally, the second switch is a ball valve mechanism, and the second switch includes a second spring 1241 , a steel ball 1242 , and an inner valve seat 1243 .

[0094] The slide valve mechanism and the ball valve mechanism switch the communication between the fourth sub-channel 121 and the fifth sub-channel 122 according to the change of the hydraulic oil pressure.

[0095] Optionally, the outer valve seat 1231 and the inner valve seat 1243 are arranged opposite to each other, the valve core 1233 is connected to the outer valve seat 1231, and the first spring 1232 is sleeved on the valve core 1233. The steel ball 1242 abuts against the inner valve seat 1243, and the second spring 1241 is arranged at one end of the steel ball 1242 away from the inner valve seat 1243.

[0096] Specifically, in the first state, that is, the working mode in which the pump device 100 establishes pressure, the fifth sub-channel 122 is a high-pressure chamber, the fourth sub-channel 121 is a low-pressure chamber, the steel ball 1242 moves upward to squeeze the second spring 1241, so that the ball valve mechanism opens the fifth sub-channel 122, and the valve core 1233 moves upward to make the sliding valve mechanism close the fourth sub-channel 121.

[0097] In the second state, i.e., the working mode of the pump device 100 unloading pressure, the fifth subchannel 122 is a low-pressure chamber, the valve core 1233 moves downward, compressing the first spring 1232, and the slide valve mechanism opens the fourth subchannel 121. The steel ball 1242 moves downward, and the ball valve mechanism closes the fifth subchannel 122.

[0098] A switch is provided so that the return valve 12 can automatically determine the change in the position of the high and low pressure chambers when the suspension system of the vehicle is lifted or lowered, and switch the connection between the first channel 112 and the fourth sub-channel 121 or the fifth sub-channel 122 inside the return valve 12, so as to realize the recovery of hydraulic oil according to whether the pump device 100 is under unloading pressure and building pressure.

[0099] For reference Figure 5 and Figure 6 In one embodiment, the return valve 12 is further provided with a first oil passage opening 125, and the first oil passage opening 125 is suitable for connecting the fifth sub-channel 122 and the third channel 115, and the first oil passage opening 125 is also suitable for connecting with the liquid storage pot 20 and the pump element 50 of the pump device 100.

[0100] In the first state, the pump 50 works, so that the hydraulic oil enters the first oil channel opening 125 from the liquid storage pot 20, and provides hydraulic oil for the first flow channel.

[0101] For reference Figure 3 In one embodiment, the return valve 12 is further provided with a second oil passage opening 126 , and the second oil passage opening 126 is suitable for connecting the fourth sub-channel 121 and the second channel 114 .

[0102] The second oil passage 126 is provided to extend the flow path of the hydraulic oil in the return valve 12 , so that the hydraulic oil will not accumulate inside the return valve 12 during the channel switching process inside the return valve 12 .

[0103] For reference Figure 1 and Figure 3In one embodiment, the pump assembly further includes a diverter 13 , which is connected to the support member 11 , and is connected to the outlet of the second flow channel, and the diverter 13 is suitable for reducing the impact pressure of the liquid in the liquid storage pot 20 .

[0104] Specifically, the flow divider 13 is disposed at the end of the second channel 114 away from the reflux valve 12 .

[0105] In the second state, the hydraulic oil enters the liquid reservoir 20 from the second channel 114, and the diverter 13 connects the second channel 114 and the liquid reservoir 20. The diverter 13 is suitable for reducing the pressure impact of the hydraulic oil in the liquid reservoir 20 to achieve the effect of reducing noise.

[0106] For reference Figure 1 In one embodiment, the pump device 100 further includes a driving motor 40 and a noise reduction member 60 , wherein the driving motor 40 is connected to the support member 11 , and the noise reduction member 60 covers the driving motor 40 and is connected to the support member 11 .

[0107] The driving motor 40 and the support member 11 may be connected in a threaded manner. The driving motor 40 is suitable for driving the pump member 50 to work, so that the hydraulic oil flows out from the oil outlet 55 of the pump member 50 and enters the first flow channel of the support member 11.

[0108] The drive motor 40 can be a DC motor, an AC motor, an asynchronous motor, a synchronous motor, a permanent magnet synchronous motor, a switched reluctance motor, etc., without limitation.

[0109] The noise reduction component 60 can be made of fiber materials, foam materials, etc. without limitation. Specifically, the fiber materials can be glass fiber, glass wool, etc., the foam materials can be PU foam, etc., and the material of the noise reduction component 60 can also be EPDM, EVA, etc. without limitation.

[0110] The noise reduction component 60 can be divided into a sound insulation component (suitable for blocking the spread of noise), a sound absorption component (suitable for absorbing the noise generated by the driving motor 40), a shock absorbing component (reducing the vibration generated during the driving of the vehicle), etc.

[0111] The connection method of the noise reduction member 60 and the driving motor 40 can be screw connection, clamp connection, bonding, etc., without limitation. The connection method of the noise reduction member 60 and the supporting member 11 is the same as above.

[0112] The noise reduction member 60 is coated on the outside of the driving motor 40 to reduce the noise when the motor is working, that is, when the vehicle suspension system is lifted, so as to improve the comfort. The noise reduction member 60 is also connected to the support member 11, which improves the integration of the pump device 100.

[0113] The drive motor 40 is also connected to the pump member 50. Specifically, the drive motor 40 is connected to the pump member 50 through a coupling. After the drive motor 40 is powered on, it provides a driving torque to the gear 57. After the gear 57 rotates, the hydraulic oil is transferred from the low-pressure chamber such as the oil inlet 54 to the high-pressure chamber such as the oil outlet 55, converting kinetic energy into potential energy, thereby achieving the effect of building up pressure.

[0114] For reference Figure 1 In one embodiment, the pump device 100 further includes a temperature sensor 30 , which is connected to the liquid storage pot 20 , and the temperature sensor 30 is suitable for detecting the temperature of the liquid in the liquid storage pot 20 .

[0115] The temperature sensor 30 and the liquid storage pot 20 may be connected by welding, clamping, bonding, screwing, etc., without limitation.

[0116] The temperature sensor 30 may be a contact sensor, a non-contact sensor, etc. Specifically, the temperature sensor 30 may be a resistance thermometer, a thermocouple, a thermistor, an infrared temperature sensor 30, a thermal resistor, an optical fiber temperature sensor 30, etc., without limitation.

[0117] A sealing gasket is also provided at the interface between the temperature sensor 30 and the liquid storage pot 20. Since the hydraulic oil is connected to the atmosphere and the pressure is relatively low, a sealing gasket is provided to prevent leakage of the hydraulic oil.

[0118] The temperature sensor 30 is suitable for detecting the temperature of the hydraulic oil. If the temperature of the hydraulic oil is too high, the viscosity of the hydraulic oil will decrease, and the oil leakage will be more obvious. In addition, under high temperature conditions, the hydraulic oil will be affected by oxidation, moisture and particulate contaminants and deteriorate, resulting in a greatly reduced life of the pump device 100. By detecting the temperature of the hydraulic oil, some potential problems can be discovered and dealt with in time, such as the low liquid level in the liquid storage pot 20, the blockage of the hydraulic oil filter and the circuit, and the poor heat dissipation of the radiator.

[0119] The suspension system of the present invention connects multiple components to the support member 11 of the pump device 100, and the pump member 50, the drive motor 40, the liquid storage pot 20, the accumulator 14, the pressure sensor 15, etc. are all fixed on the support member 11. At the same time, the support member 11 and the return valve 12 provide a second flow channel and a first flow channel inside, which are connected with each component to realize two flow paths of hydraulic oil in different states, and the support member 11 also provides a adapter 111 to transport hydraulic oil to other external devices. Specifically, the connection method of the components of the pump device 100 can be: the liquid storage pot 20, the pump member 50, the drive motor 40 and the noise reduction member 60 are fixed to the support member 11 by bolts; the pressure sensor 15 and the accumulator 14 are designed with threads and directly fixed to the support member 11; the temperature sensor 30 is designed with threads and directly fixed to the liquid storage pot 20. Multiple components of the suspension system of the present invention are integrated on the support member 11 of the pump device 100, so the multiple components of the suspension system of the present invention are compactly distributed, the integration of the suspension system is high, and the space occupied is small.

[0120] The present invention provides a vehicle, comprising the suspension system of the various embodiments described above. The vehicle also includes a vehicle body, and the suspension system and the vehicle body are connected and fixed. When the suspension system of the vehicle of the present invention is lifted, the pump device 100 builds up pressure, and the pump device 100 sucks the hydraulic oil out of the liquid reservoir 20; when the suspension system of the vehicle is lowered, the pump device 100 releases the pressure, and the hydraulic oil flows back to the liquid reservoir 20 through the pump device 100, so as to facilitate the collection of the hydraulic oil.

[0121] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0122] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A pump device (100), characterized in that: include: A pump assembly (10) comprising a first flow channel, a second flow channel, an oil inlet (54) and an oil outlet (55), wherein the outlet of the first flow channel and the inlet of the second flow channel are adapted to be in communication with a hydraulic pipeline of a suspension system, the oil inlet (54) is in communication with the oil outlet (55), and the oil outlet (55) is in communication with the inlet of the first flow channel; A liquid storage pot (20) is connected to the pump assembly (10), and the liquid storage pot (20) is in communication with the oil inlet (54) and the outlet of the second flow channel.

2. The pump device (100) according to claim 1, characterized in that The outlet of the first flow channel and the inlet of the second flow channel are shared, and the outlet of the second flow channel and the inlet of the first flow channel are spaced apart.

3. The pump device (100) according to claim 1, characterized in that The pump assembly (10) comprises a pump member (50) and a support member (11), the pump member (50) being connected to the support member (11), the oil inlet (54) and the oil outlet (55) being arranged on the pump member (50), and the first flow channel and the second flow channel being arranged in the support member (11).

4. The pump device (100) according to claim 3, characterized in that The pump device (100) further comprises a reflux valve (12), the support member (11) having a plurality of channels, the reflux valve (12) being received in one of the channels, the reflux valve (12) being adapted to switch between a first state and a second state, wherein in the first state at least a portion of the channels constitutes the first flow channel, and in the second state at least a portion of the channels constitutes the second flow channel, and both the first flow channel and the second flow channel pass through the reflux valve (12).

5. The pump device (100) according to claim 3, characterized in that The pump device (100) further comprises an accumulator (14), the accumulator (14) being connected to the support member (11), the accumulator (14) being in communication with the first flow channel and the second flow channel, and the accumulator (14) being suitable for absorbing pressure impact of liquid in the first flow channel and the second flow channel.

6. The pump device (100) according to claim 3, characterized in that The pump device (100) further comprises a pressure sensor (15), wherein the pressure sensor (15) is connected to the support member (11), the pressure sensor (15) is in communication with the first flow channel, and the pressure sensor (15) is suitable for detecting the pressure at the outlet of the first flow channel.

7. The pump device (100) according to claim 3, characterized in that The pump device (100) further comprises a diverter (13), wherein the diverter (13) is connected to the support member (11), the diverter (13) is communicated with the outlet of the second flow channel, and the diverter (13) is suitable for reducing the impact pressure of the liquid in the liquid storage pot (20).

8. The pump device (100) according to claim 3, characterized in that The pump device (100) further comprises a driving motor (40) and a noise reduction member (60), wherein the driving motor (40) is connected to the supporting member (11), and the noise reduction member (60) covers the driving motor (40) and is connected to the supporting member (11).

9. The pump device (100) according to claim 1, characterized in that The pump device (100) further comprises a temperature sensor (30), wherein the temperature sensor (30) is connected to the liquid storage pot (20), and the temperature sensor (30) is suitable for detecting the temperature of the liquid in the liquid storage pot (20).

10. A suspension system, characterized in that: Comprising the pump device (100) according to any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the suspension system of claim 10.

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