CN117889061A - Pump liquid mechanism, liquid supply system, electric drive system and vehicle - Google Patents

Abstract

The application provides a pump liquid mechanism, liquid feed system, electricity drive system and vehicle, pump liquid mechanism is used for the vehicle, and the vehicle includes electric mechanism and differential lock mechanism and pump liquid mechanism that is connected with electric mechanism that drives, and pump liquid mechanism includes: a housing assembly and a pressurizing assembly. The shell assembly is provided with a pressurizing cavity, a first liquid outlet and a second liquid outlet which are isolated from each other; one of the first liquid outlet and the second liquid outlet is connected with the electric driving mechanism, and the other is connected with the differential lock mechanism; the pressurizing assembly is arranged in the pressurizing cavity and is used for pressurizing working fluid in the pressurizing cavity so that the working fluid is output along the first liquid outlet and the second liquid outlet respectively. By the mode, the liquid supply link combination structure of the liquid supply system can be effectively simplified, the cost of the liquid supply system is saved, and the escaping capability of the electric drive system is effectively improved.

Description

Pump liquid mechanism, liquid supply system, electric drive system and vehicle

Technical Field

The application relates to the technical field of liquid supply of electric drive systems of new energy vehicles, in particular to a liquid pumping mechanism, a liquid supply system, an electric drive system and a vehicle.

Background

In recent years, energy safety and low-carbon economy are advocated, and new energy automobiles are vigorously developed. As an electric drive system assembly of the heart of the electric automobile, the electric drive system assembly also becomes a key point for breakthrough of each vehicle enterprise. And the electric drive technology is increasingly expanded to off-road vehicles, pick-up cards and commercial vehicles, the requirements on all-terrain limit working conditions are increasingly increased, the requirements on the vehicle escaping capability are improved, and the development of an electric drive system with a differential lock mechanism is imperative. The liquid supply system of the existing electric drive system has complex structure and higher cost, so that how to optimize the structure of the liquid supply system to optimize the whole structure of the electric drive system is a technical problem which needs to be solved urgently at present.

Disclosure of Invention

The application provides a pump liquid mechanism, liquid supply system, electricity drive system and vehicle for simplify liquid supply link combination structure of liquid supply system, save the cost of liquid supply system, and be used for promoting the ability of getting rid of poverty of electricity drive system.

In order to solve the technical problems, the technical scheme adopted by the application is as follows: the utility model provides a pump liquid mechanism for the vehicle, the vehicle include electric drive mechanism and with electric differential lock mechanism and pump liquid mechanism that drive the mechanism and be connected, pump liquid mechanism includes: a housing assembly and a pressurizing assembly. The shell assembly is provided with a pressurizing cavity, a first liquid outlet and a second liquid outlet which are isolated from each other; one of the first liquid outlet and the second liquid outlet is connected with the electric driving mechanism, and the other is connected with the differential lock mechanism; the pressurizing assembly is arranged in the pressurizing cavity and is used for pressurizing working fluid in the pressurizing cavity so that the working fluid is output along the first liquid outlet and the second liquid outlet respectively.

In some embodiments, the pressurizing cavity comprises a first sub-pressurizing cavity and a second sub-pressurizing cavity which are isolated from each other, the first sub-pressurizing cavity is communicated with the first liquid outlet, and the second sub-pressurizing cavity is communicated with the second liquid outlet; the pressurizing assembly includes: the first pressurizing piece is arranged in the first sub pressurizing cavity and is used for pressurizing working fluid in the first sub pressurizing cavity; the second pressurizing piece is arranged in the second sub-pressurizing cavity and is used for pressurizing working fluid in the second sub-pressurizing cavity.

In some embodiments, the housing assembly is further provided with a drive chamber, and the pumping mechanism further comprises: the driving assembly is arranged in the driving cavity, and a driving shaft of the driving assembly is respectively connected with the first pressurizing piece and the second pressurizing piece in a transmission way; wherein, drive assembly is used for driving first pressure piece and second pressure piece simultaneously.

In order to solve the technical problems, the technical scheme adopted by the application is as follows: there is provided a liquid supply system including the liquid pumping mechanism as set forth in any one of the above embodiments, further comprising: an infusion assembly, comprising: the first sub-transfusion assembly is connected with the first liquid outlet and the electric driving mechanism; the second sub-transfusion assembly is connected with the second liquid outlet and the differential lock mechanism; the first infusion subassembly is used for guiding the working fluid to the electric driving mechanism so as to lubricate the electric driving mechanism; the second sub-infusion assembly is used for selectively guiding working fluid to the differential lock mechanism so as to control the differential lock mechanism to work.

In some embodiments, a second sub-infusion assembly is coupled to the electro-drive mechanism, the second sub-infusion assembly further configured to direct the working fluid to the electro-drive mechanism.

In some embodiments, the second sub-infusion assembly comprises: the first switch valve is respectively connected with the second liquid outlet, the electric drive mechanism and the differential lock mechanism; the first switch valve is used for selectively communicating the second liquid outlet port with the differential lock mechanism; or the first switch valve is used for selectively communicating the second liquid outlet with the electric driving mechanism.

In some embodiments, the second sub-infusion assembly comprises: the first end of the second switch valve is connected with the second liquid outlet, and the second end of the second switch valve is connected with the differential lock mechanism; the first end of the overflow valve is connected with the second liquid outlet, and the second end of the overflow valve is connected with the electric driving mechanism; the second switch valve is used for selectively communicating the second liquid outlet with the differential lock mechanism; the overflow valve is used for responding to the hydraulic parameter of the second liquid outlet port to be larger than a preset threshold value and communicating the second liquid outlet port with the electric drive mechanism.

In some embodiments, the liquid supply system further comprises: and the liquid cooler is respectively connected with the electric driving mechanism, the first infusion subassembly and the second infusion subassembly and is used for cooling the working liquid input into the electric driving mechanism.

In some embodiments, the liquid supply system further comprises: the processing circuit is respectively connected with the liquid pumping mechanism and the second sub-transfusion assembly; the processing circuit is used for acquiring the motion parameters of the vehicle and outputting a first control signal in response to the motion parameters of the vehicle being greater than a preset motion threshold; the liquid pumping mechanism is used for outputting working liquid along the first liquid outlet and the second liquid outlet simultaneously based on the first control signal; the second infusion subassembly is used for communicating second drain hole and differential lock mechanism based on first control signal.

In some embodiments, the electric drive mechanism comprises a first executing mechanism and a second executing mechanism, the differential lock mechanism is respectively connected with the first executing mechanism and the second executing mechanism, and the motion parameter comprises an absolute value of a rotational speed difference between the first executing mechanism and the second executing mechanism.

In order to solve the technical problems, the technical scheme adopted by the application is as follows: an electric driving system is provided, which comprises the liquid supply system, the electric driving mechanism and the differential lock mechanism connected with the electric driving mechanism, wherein the liquid supply system is respectively connected with the electric driving mechanism and the differential lock mechanism.

In some embodiments, the electro-mechanical mechanism includes: the electric drive assembly is connected with the differential lock mechanism; a first actuator; a second actuator; the differential lock mechanism is used for selectively controlling the first executing mechanism to be in transmission connection with the electric drive assembly; and/or the differential lock mechanism is used for selectively controlling the second actuating mechanism to be in transmission connection with the electric drive assembly.

In order to solve the technical problems, the technical scheme adopted by the application is as follows: there is provided a vehicle comprising an electric drive system of any of the embodiments described above.

The beneficial effects of the embodiment of the application are that: the liquid pumping mechanism of this application includes: a housing assembly and a pressurizing assembly. The shell assembly is provided with a pressurizing cavity, a first liquid outlet and a second liquid outlet which are isolated from each other; one of the first liquid outlet and the second liquid outlet is connected with the electric driving mechanism, and the other is connected with the differential lock mechanism; the pressurizing assembly is arranged in the pressurizing cavity and is used for pressurizing working fluid in the pressurizing cavity so that the working fluid is output along the first liquid outlet and the second liquid outlet respectively. Through the mode, the liquid pumping mechanism can simultaneously provide mutually independent working liquid flow paths for a plurality of working mechanisms, such as an electric drive mechanism and a differential lock mechanism, so that each working mechanism can efficiently and stably complete corresponding work, the work of outputting the mutually independent working liquid flow paths to the plurality of working mechanisms, which is completed by matching a plurality of liquid supply mechanisms or matching a corresponding hydraulic element by adopting a single liquid supply mechanism in the prior art, is completed, and further, the liquid supply link (the liquid supply link is also called as an infusion assembly in the text) of the liquid supply system is effectively simplified to be combined into a structure, and the cost of the liquid supply system is saved. Further, the first liquid outlet is connected with the electric driving mechanism, the second liquid outlet is connected with the differential lock mechanism, wherein the liquid pumping mechanism can output working liquid meeting the hydraulic parameters of the working requirement of the electric driving mechanism along the first liquid outlet so as to lubricate and cool the electric driving mechanism, and output working liquid meeting the hydraulic parameters of the working requirement of the differential lock mechanism along the second liquid outlet so as to drive the differential lock mechanism to execute the differential lock function.

Drawings

FIG. 1 is a schematic view of an embodiment of a pumping mechanism of the present application;

FIG. 2 is a schematic view of a first embodiment of a liquid supply system of the present application;

FIG. 3 is a schematic diagram of the first switch valve of the liquid supply system in FIG. 2 in the form of a two-position three-way solenoid valve;

FIG. 4 is a schematic diagram of the structure of the first switch valve of the liquid supply system in FIG. 2 when the first switch valve is a three-position four-way solenoid valve;

FIG. 5 is a schematic view of a second embodiment of a liquid supply system of the present application;

fig. 6 is a schematic structural diagram of the second switching valve of the liquid supply system in fig. 5 when the second switching valve is a two-position three-way electromagnetic valve.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "first," "second," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover an exclusive inclusion. For example, a process, method, electronic device, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The present application provides a fluid pumping mechanism 10, as shown in fig. 1, for use in vehicles, including new energy vehicles, such as electric vehicles, and the like, while the fluid pumping mechanism 10 of the present application may also be used in vehicles with other power systems, such as vehicles with conventional power, e.g., gasoline, diesel, and the like. The fluid pumping mechanism 10 of the present application will be described in detail herein with particular application of the fluid pumping mechanism 10 to an electric drive system of an electric vehicle. The vehicle comprises an electric drive system, wherein the electric drive system comprises an electric drive mechanism 20, a differential lock mechanism 30 connected with the electric drive mechanism 20 and a liquid supply system 50. Optionally, the electric drive mechanism 20 includes an electric drive assembly for driving the first actuator including one or more of all the drive wheels of the vehicle, a first actuator including one or more of the drive wheels of the vehicle, and a second actuator, such as in some embodiments, the first actuator being a left drive wheel of the vehicle, and the second actuator being a right drive wheel of the vehicle. The differential lock mechanism 30 is respectively connected with the first executing mechanism and the second executing mechanism, and when the differential lock mechanism 30 executes the differential lock function, one of the first executing mechanism and the second executing mechanism is locked, so that the power of the electric drive assembly is fully concentrated on the other executing mechanism, and the vehicle can realize the escape self-rescue under the limit working condition. Wherein the fluid supply system 50 is operable to provide hydraulic pressure to the differential lock mechanism 30 to drive the differential lock mechanism 30 to perform a differential lock function.

The liquid pumping mechanism 10 of the present application is applied to the liquid supply system 50 described above, wherein the liquid pumping mechanism 10 includes: the housing assembly 100 and the compression assembly 200.

The housing assembly 100 is provided with a pressurizing chamber 116, a first liquid outlet 115 and a second liquid outlet 114 which are isolated from each other; one of the first liquid outlet 115 and the second liquid outlet 114 is connected to the electric drive mechanism 20, and the other is connected to the differential lock mechanism 30; the pressurizing assembly 200 is disposed in the pressurizing chamber 116, and the pressurizing assembly 200 is used for pressurizing the working fluid in the pressurizing chamber 116 to output the working fluid along the first liquid outlet 115 and the second liquid outlet 114, respectively.

Specifically, in the present embodiment, the liquid pumping mechanism 10 includes a housing assembly 100 and a pressurizing assembly 200, where the housing assembly 100 is provided with a pressurizing chamber 116, and the pressurizing assembly 200 is disposed in the pressurizing chamber 116 to pressurize the working liquid in the pressurizing chamber 116. Further, the housing assembly 100 is provided with the first liquid outlet 115 and the second liquid outlet 114 isolated from each other, on the basis of which the working liquids respectively flowing out along the first liquid outlet 115 and the second liquid outlet 114 do not interfere with each other, in other words, on the basis of which the hydraulic parameters of the working liquid flowing out along the first liquid outlet 115 are determined by the working power of the pressurizing assembly 200, not influenced by the second liquid outlet 114, and the hydraulic parameters of the working liquid flowing out along the second liquid outlet 114 are determined by the working power of the pressurizing assembly 200, not influenced by the first liquid outlet 115. The hydraulic parameters include flow, pressure, and the like, and are not described in detail herein. In this way, the pumping mechanism 10 can provide mutually independent working fluid flow paths for a plurality of working mechanisms, such as the electric driving mechanism 20 and the differential lock mechanism 30, so as to ensure that each working mechanism can efficiently and stably complete corresponding work, thereby completing the work of outputting mutually independent working fluid flow paths for a plurality of working mechanisms, which is only completed by matching a plurality of liquid supply mechanisms or matching a corresponding hydraulic element with a single liquid supply mechanism in the prior art, further effectively simplifying the combination structure of the liquid supply links (the liquid supply links are also referred to as the infusion assembly 500 in this document) of the liquid supply system 50, and saving the cost of the liquid supply system 50. For example, in the present embodiment, the first liquid outlet 115 is connected to the electric driving mechanism 20, the second liquid outlet 114 is connected to the differential lock mechanism 30, where the liquid pumping mechanism 10 can output the working liquid according to the hydraulic parameters of the working requirement of the electric driving mechanism 20 along the first liquid outlet 115 to lubricate and cool the electric driving mechanism 20, and output the working liquid according to the hydraulic parameters of the working requirement of the differential lock mechanism 30 along the second liquid outlet 114 to drive the differential lock mechanism 30 to perform the differential lock function, based on which it can be effectively ensured that the liquid supply system 50 can also lubricate and cool the electric driving mechanism 20 effectively when the differential lock mechanism 30 is in the differential lock function, thereby ensuring the normal and stable operation of the electric driving system and improving the escaping capability of the electric driving system.

Optionally, a hydraulic fluid, such as hydraulic oil, may be used to both drive the differential lock mechanism 30 and lubricate and cool the electric drive mechanism 20.

Optionally, the pressurizing cavity 116 includes a first sub-pressurizing cavity 113 and a second sub-pressurizing cavity 112 that are isolated from each other, the first sub-pressurizing cavity 113 is communicated with the first liquid outlet 115, and the second sub-pressurizing cavity 112 is communicated with the second liquid outlet; the pressurizing assembly 200 includes: the first pressure member 220 and the second pressure member 210, wherein the first pressure member 220 is disposed in the first sub-pressure chamber 113 and is used for pressurizing the working fluid in the first sub-pressure chamber 113; the second pressurizing member 210 is disposed in the second sub-pressurizing chamber 116, and is used for pressurizing the working fluid in the second sub-pressurizing chamber 112.

Specifically, in the present embodiment, the pressurizing chamber 116 is configured as a first sub-pressurizing chamber 113 and a second sub-pressurizing chamber 112 that are isolated from each other, where the first sub-pressurizing chamber 113 is communicated with the first liquid outlet 115, the second sub-pressurizing chamber 112 is communicated with the second liquid outlet, and the first pressurizing member 220 and the second pressurizing member 210 are respectively disposed in the first sub-pressurizing chamber 113 and the second sub-pressurizing chamber 112 to pressurize the corresponding working fluid, so that the mutual interference of the working fluid paths output by the first sub-liquid outlet and the second sub-liquid outlet can be effectively prevented.

Optionally, the housing assembly 100 is further provided with a drive chamber 111, and the pumping mechanism 10 further comprises: the driving assembly 300 is arranged in the driving cavity 111, and a driving shaft of the driving assembly 300 is respectively connected with the first pressing piece 220 and the second pressing piece 210 in a transmission way; wherein the driving assembly 300 is used to simultaneously drive the first and second pressurizing members 220 and 210.

Specifically, in the present embodiment, the housing assembly 100 is further provided with the driving chamber 111, wherein the liquid pumping mechanism 10 further comprises the driving assembly 300, wherein the driving assembly 300 is disposed in the driving chamber 111, and the driving shaft thereof extends to the first sub-pressurizing chamber 113 and the second sub-pressurizing chamber 112 and is in transmission connection with the first pressurizing member 220 and the second pressurizing member 210, respectively, wherein the driving assembly 300 is used for simultaneously driving the first pressurizing member 220 and the second pressurizing member 210, based on which the constituent elements of the liquid pumping mechanism 10 can be effectively simplified, thereby effectively saving the cost of the liquid pumping mechanism 10. The driving assembly 300 may include an electrically driven assembly, and the specific structural components thereof may be referred to in the prior art and will not be described herein in detail.

Alternatively, the housing assembly 100 may specifically include a first housing 110, a second housing 120, a spacer 130, and an end cap 140 that are detachably connected. The first housing 110 is provided with a driving cavity 111, one side of the first housing 110 facing away from the driving cavity 111 is provided with a second sub-pressurized cavity blank, and the spacer 130 is covered at an opening of the second sub-pressurized cavity blank to form a second sub-pressurized cavity 112 in cooperation with the first housing 110. The side of the spacer 130 facing away from the second sub-pressurized cavity 112 is provided with a first sub-pressurized cavity blank, wherein the end cap 140 covers the first sub-pressurized cavity blank to cooperate with the spacer 130 to form the first sub-pressurized cavity 113. The second housing 120 is provided with a receiving cavity, and the first housing 110, the spacer 130, and the end cap 140 are sleeved in the receiving cavity. The end cap 140 is provided with an oil inlet 117 communicating with the first sub-pressurizing chamber 113 and the second sub-pressurizing chamber 112, and the driving assembly 300 drives the first pressurizing member 220 and the second pressurizing member 210 to move, so that the working fluid enters the first sub-pressurizing chamber 113 and the second sub-pressurizing chamber 112 along the oil inlet 117, and flows out along the first liquid outlet 115 and the second liquid outlet 114 after pressurizing. Wherein, a portion of the first liquid outlet 115 is disposed between the end cap 140 and the spacer 130, another portion is disposed in the second housing 120, a portion of the second liquid outlet 114 is disposed between the spacer 130 and the first housing 110, and another portion is disposed in the second housing 120. The liquid pumping mechanism 10 further comprises at least a sealing ring 400, wherein the sealing ring 400 is disposed between the second housing 120 and the spacer 130, and is used for isolating the first liquid outlet 115 and the second liquid outlet 114, so as to effectively realize mutual isolation between the first liquid outlet 115 and the second liquid outlet 114. Alternatively, in other embodiments, the housing assembly 100 may also achieve the mutual isolation of the first sub-pressurized cavity 113 and the second sub-pressurized cavity 112 in other manners, and achieve the mutual isolation of the first liquid outlet port 115 and the second liquid outlet port 114 in other manners, which are not described in detail herein.

The present application also provides a liquid supply system 50, as shown in fig. 2-6, where the liquid supply system 50 includes the liquid pumping mechanism 10 described in any of the embodiments above. Wherein the liquid supply system 50 further comprises: infusion set 500. The infusion set 500 includes: a first sub-infusion assembly 510 and a second sub-infusion assembly 520. Wherein, the first infusion sub-assembly 510 is connected with the first liquid outlet 115 and the electric driving mechanism 20; the second infusion set 520 is connected to the second fluid outlet port 114 and the differential lock mechanism 30. Wherein, the first infusion sub-assembly 510 is used for guiding the working fluid to the electric driving mechanism 20 so as to lubricate the electric driving mechanism 20; the second sub-infusion assembly 520 is used to selectively direct working fluid to the differential lock mechanism 30 to control the operation of the differential lock mechanism 30.

Specifically, in this embodiment, the liquid supply system 50 performs liquid pumping by using the liquid pumping mechanism 10 described in any of the above embodiments, where the liquid supply system 50 is further provided with an oil infusion assembly 500, and two mutually independent working fluid paths output by the liquid pumping mechanism 10 are respectively output to corresponding working mechanisms through the infusion assembly 500, so that the working efficiency and the working stability of the working mechanisms, such as the electric drive mechanism 20 and the differential lock mechanism 30, can be effectively improved. For example, in this embodiment, the infusion set 500 includes a first sub-infusion set 510 and a second sub-infusion set 520, wherein the first sub-infusion set 510 is coupled to the first fluid outlet port 115 and the electric drive mechanism 20, and the second sub-infusion set 520 is coupled to the second fluid outlet port 114 and the differential lock mechanism 30. The first infusion sub-assembly 510 is configured to output the working fluid to the electric driving mechanism 20, so that the working fluid can efficiently lubricate and cool the electric driving mechanism 20, and the second infusion sub-assembly 520 outputs another working fluid pumped from the pump mechanism 10 to the differential lock mechanism 30, so that the working fluid can efficiently drive the differential lock mechanism 30 to work.

Unlike the prior art, the infusion assembly 500 of the liquid supply system 50 of the present application at least includes two paths, which are the first infusion sub-assembly 510 and the second infusion sub-assembly 520, where the first infusion sub-assembly 510 and the first infusion sub-assembly 510 are respectively connected to two paths of independent working liquid paths, and convey the corresponding working liquid paths to the corresponding working mechanisms, and based on this, when the multiple working mechanisms need to work simultaneously, the liquid supply system 50 can output multiple paths of independent working liquid paths to the corresponding working mechanisms through the infusion assembly 500 simultaneously, thereby effectively improving the working efficiency of the corresponding working mechanisms. For example, in this embodiment, when the vehicle is in a more complex working condition and needs the electric driving system to drive the vehicle to get rid of the trouble, the electric driving mechanism 20 needs a high load while the differential locking mechanism 30 performs the differential locking operation, under the working condition, the liquid supply system 50 needs to output two mutually independent working liquids to the electric driving mechanism 20 and the differential locking mechanism 30 through the infusion assembly 500 respectively, so that the differential locking mechanism 30 can stably complete the differential locking function, and meanwhile, the electric driving mechanism 20 in the high load state can be well cooled and lubricated, so as to effectively improve the getting rid of the trouble of the electric driving system.

Optionally, a second sub-infusion assembly 520 is connected to the electro-drive mechanism 20, the second sub-infusion assembly 520 also being used to direct working fluid to the electro-drive mechanism 20. Specifically, in the present embodiment, the second infusion set 520 is further connected to the electric drive mechanism 20, wherein the second infusion set 520 is further configured to guide the working fluid to the electric drive mechanism 20 for lubrication and cooling of the electric drive mechanism 20.

For example, in some embodiments, where the differential lock mechanism 30 performs a differential lock function or where the working fluid delivered by the second sub-infusion assembly 520 has exceeded the actual need for the differential lock mechanism 30 to perform a differential function, the second sub-infusion assembly 520 will communicate the second fluid outlet 114 with the electric drive mechanism 20, thereby delivering excess working fluid from the second sub-infusion assembly 520 to the electric drive mechanism 20, thereby cooling and lubricating the electric drive mechanism 20.

Optionally, as shown in fig. 2, the second sub-infusion assembly 520 includes: the first switching valve 520a. The first switch valve 520a is connected to the second liquid outlet 114, the electric drive mechanism 20, and the differential lock mechanism 30, respectively; wherein the first switch valve 520a is used to selectively communicate the second liquid outlet port 114 with the differential lock mechanism 30; or first switch valve 520a is used to selectively communicate second fluid outlet port 114 with electric drive mechanism 20.

Specifically, in the present embodiment, the second infusion sub-assembly 520 includes a first switch valve 520a and an infusion line, where the first switch valve 520a is connected to the second liquid outlet 114, the electric driving mechanism 20, and the differential lock mechanism 30 through the infusion line. The first switch valve 520a can connect the second liquid outlet 114 with the differential lock mechanism 30 and disconnect the second liquid outlet 114 from the electric drive mechanism 20, so that the working liquid flowing out of the second liquid outlet 114 drives the differential lock mechanism 30 to work independently, and in the process, the differential lock mechanism 30 can be provided with continuous hydraulic pressure by the liquid pumping mechanism 10 so that the differential lock mechanism 30 can be kept in a locking state all the time, or the differential lock mechanism 30 can also be matched with the first switch valve 520a to form a closed oil way, thereby realizing pressure maintenance so that the differential lock mechanism 30 can be kept in a locking state all the time, and the working stability of the differential lock mechanism can be effectively improved based on the pressure maintenance. Further, the first switch valve 520a can disconnect the second liquid outlet 114 from the differential mechanism, and connect the second liquid outlet 114 with the electric driving mechanism 20, so that the working liquid flowing out of the second liquid outlet 114 is supplied to the electric driving mechanism 20 entirely, so as to lubricate and cool the electric driving mechanism 20.

Alternatively, as shown in fig. 3, the first switch valve 520a may implement the above function by using a two-position three-way electromagnetic valve 520b, where the two-position three-way electromagnetic valve 520b includes a first conducting position and a second conducting position, when the two-position three-way electromagnetic valve 520b is in the first conducting position, the second liquid outlet 114 communicates with the electric drive mechanism 20, and the differential lock mechanism 30 communicates with the oil tank 40 and stops operating. When the two-position three-way electromagnetic valve 520b is in the second conducting position, the second liquid outlet 114 is communicated with the differential lock mechanism 30, and the electric drive mechanism 20 is disconnected from the second liquid outlet 114, so that the working fluid flowing out of the second liquid outlet 114 independently drives the differential lock mechanism 30 to work. For example, in the present embodiment, the differential lock mechanism 30 includes an elastic member, a piston member, an oil cylinder member, and a differential lock, wherein the piston member is disposed in a movable chamber of the oil cylinder member and divides the movable chamber into an oil inlet chamber and a return chamber, and the differential lock is disposed at one end of the piston member. Wherein, the oil inlet cavity is internally provided with a unique oil inlet and outlet. When the vehicle is in the limit working condition, the two-position three-way electromagnetic valve 520b is switched to the second conduction position, and the liquid pumping mechanism 10 pumps the working liquid into the oil inlet cavity along the only inlet and outlet of the oil inlet cavity with a certain hydraulic parameter, so as to push the piston member to move to the corresponding position and keep the piston member towards the reset cavity, thereby enabling the differential lock to lock part of the executing mechanisms (wherein the executing mechanisms comprise a first executing mechanism and a second executing mechanism, and the contents can be seen in detail below) in the electric driving mechanism 20, thereby realizing the differential lock function and further assisting the vehicle to get rid of poverty. When the vehicle gets rid of the trapped state (i.e. when the vehicle has successfully got rid of the trapped state under the limit working condition), the two-position three-way electromagnetic valve 520b is switched to the first conduction position, at this time, the two-position three-way electromagnetic valve 520b communicates the inlet and the outlet with the oil tank 40 of the liquid supply system 50, and communicates the second liquid outlet 114 with the electric drive mechanism 20, based on this, the elastic element pushes the piston element back to the oil inlet cavity, so that the working fluid in the oil inlet cavity can flow back to the oil tank 40 along the inlet and the outlet, thereby resetting the differential lock and stopping the differential lock function, and further enabling the vehicle to recover the normal running function. In other embodiments, the differential lock mechanism 30 may be other types of components, and will not be described in detail herein.

Alternatively, as shown in fig. 4, the first switching valve 520a may employ a three-position four-way solenoid valve 520c, wherein the three-position four-way solenoid valve 520c includes a first conduction bit, a second conduction bit, and a third conduction bit. When the three-position four-way solenoid valve 520c is in the first conduction position or the third conduction position, the second liquid outlet 114 is communicated with the electric drive mechanism 20, and the differential lock mechanism 30 is communicated with the oil tank 40 and stops working. When the three-position four-way electromagnetic valve 520c is in the second conducting position, the second liquid outlet 114 is communicated with the differential lock mechanism 30, and the electric drive mechanism 20 is disconnected with the second liquid outlet 114, so that the working fluid flowing out of the second liquid outlet 114 independently drives the differential lock mechanism 30 to work. For example, in the present embodiment, the differential lock mechanism 30 includes an elastic member, a piston member, an oil cylinder member, and a differential lock, wherein the piston member is disposed in a movable chamber of the oil cylinder member and divides the movable chamber into an oil inlet chamber and a return chamber, and the differential lock is disposed at one end of the piston member. Wherein, the oil inlet cavity is internally provided with a unique oil inlet and outlet. When the vehicle is under the limit working condition, the three-position four-way electromagnetic valve 520c is replaced to the second conduction position in advance, so that the second liquid outlet is communicated with the inlet and the outlet, and when the working liquid in the oil inlet cavity is full or reaches the designated working position, the differential lock locks part of the executing mechanisms in the electric drive mechanism 20, further, the three-position four-way electromagnetic valve 520c is replaced to the first conduction position, so that a closed oil way is formed between the oil inlet cavity of the differential lock mechanism 30 and the three-position four-way electromagnetic valve 520c, and the differential lock mechanism 30 is in a locking and holding state. And when the three-position four-way electromagnetic valve 520c is switched to the first conduction position, the second oil outlet is communicated with the electric driving mechanism 20, and based on the second oil outlet, the working fluid flowing out of the second oil outlet 114 is completely supplied to the electric driving mechanism 20 so as to lubricate and cool the electric driving mechanism 20. Further, after the vehicle has been released from the vehicle, the three-position four-way solenoid valve 520c is switched to the third conducting position, so that the second oil outlet is communicated with the electric driving mechanism 20, and the inlet and outlet of the differential lock mechanism 30 are communicated with the oil tank 40, so that the differential lock mechanism 30 stops the differential lock function and the second oil outlet continues to provide the working fluid for the electric driving mechanism 20.

Optionally, as shown in fig. 5, the second sub-infusion assembly 520 includes: second on-off valve 530a and relief valve 800. The first end of the second switch valve 530a is connected to the second liquid outlet 114, and the second end of the second switch valve 530a is connected to the differential lock mechanism 30; the first end of the overflow valve 800 is connected with the second liquid outlet 114, and the second end of the overflow valve 800 is connected with the electric drive mechanism 20; wherein the second switch valve 530a is used to selectively connect the second liquid outlet 114 with the differential lock mechanism 30; the relief valve 800 is configured to communicate the second fluid outlet 114 with the electric drive mechanism 20 in response to the hydraulic parameter of the second fluid outlet 114 being greater than a predetermined threshold.

Specifically, in the present embodiment, the second infusion sub-assembly 520 includes an overflow valve 800, a first switch valve 520a and an infusion line, wherein the second switch valve 530a is connected to the second liquid outlet 114 and the differential lock mechanism 30 through the infusion line, and the overflow valve 800 is connected to the second liquid outlet 114 and the electric drive mechanism 20 through the infusion line. The second switch valve 530a can communicate the second liquid outlet 114 with the differential lock mechanism 30 when the vehicle is under the limit condition, so that the energy of the liquid pumping mechanism 10 is continuously output to the differential lock mechanism 30 to drive the differential lock mechanism 30 to work. The relief valve 800 is configured to be turned on when the hydraulic parameter of the second liquid outlet 114 is greater than a preset threshold, where the preset threshold is set as a rated working pressure of the differential lock mechanism 30, based on which the relief valve 800 can be turned on when the hydraulic pressure of the second liquid outlet 114 is greater than the rated working pressure of the differential lock mechanism 30, so that the excess working fluid is delivered to the electric drive mechanism 20 on the premise of ensuring that the hydraulic pressure of the second liquid outlet 114 meets the rated working pressure of the differential lock mechanism 30, so as to lubricate and cool the electric drive mechanism 20. The working principle of the relief valve 800 may be specifically described with reference to the prior art, and will not be described in detail herein.

Alternatively, as shown in fig. 6, the second switch valve 530a may be a two-position three-way solenoid valve 520b as described above, and the working principle thereof may be described with reference to the above, which is not described in detail herein.

Alternatively, the second on-off valve 530a may directly connect the second liquid outlet 114 to the tank 40 of the liquid supply system 50 after the vehicle gets stuck, and connect the differential lock mechanism 30 to the tank 40, thereby stopping the differential lock function of the differential lock mechanism 30 and simultaneously realizing unloading of the liquid pumping mechanism 10, and preventing the liquid pumping mechanism 10 from being in a high-load operation state for a long period of time.

Alternatively, in some embodiments, the second end of the relief valve 800 may be directly connected to the oil tank 40 on the premise that the working fluid at the first outlet port meets the lubrication and cooling requirements of the electric drive mechanism 20, and based on this the relief valve 800 may be used as a safety valve, so as to ensure that the differential lock mechanism 30 can operate at rated power when the vehicle is in a limited condition. And the second switch valve 530a can directly connect the second liquid outlet 114 to the oil tank 40 of the liquid supply system 50 after the vehicle gets stuck, and connect the differential lock mechanism 30 with the oil tank 40, thereby stopping the differential lock function of the differential lock mechanism 30, and simultaneously realizing partial unloading of the liquid pumping mechanism 10, and preventing the liquid pumping mechanism 10 from being in a high-load operation state for a long time.

Optionally, the liquid supply system 50 further includes: the liquid cooler 600 is connected to the electric driving mechanism 20, the first infusion sub-assembly 510 and the second infusion sub-assembly 520, respectively, and the liquid cooler 600 is used for cooling the working liquid input into the electric driving mechanism 20. Specifically, in the present embodiment, the liquid cooler 600 is disposed in the electric driving mechanism 20 and the first and second infusion sub-assemblies 510 and 520, and based on the working liquid in the first and second infusion sub-assemblies 510 and 520 needs to flow through the liquid cooler 600, and enters the electric driving mechanism 20 after being cooled in the liquid cooler 600, so that the cooling efficiency of the electric driving mechanism 20 can be effectively improved.

Optionally, the liquid supply system 50 further includes a fine filter 700 disposed between the liquid cooler 600 and the first and second sub-infusion assemblies 510 and 520, for fine filtering the working liquid in the first and second sub-infusion assemblies 510 and 520, preventing impurities from being carried in the working liquid, and effectively protecting the electric drive mechanism 20.

Optionally, the liquid supply system 50 further includes: processing circuitry (not shown) coupled to the pumping mechanism 10 and the second sub-infusion set 520, respectively; the processing circuit is used for acquiring the motion parameters of the vehicle and outputting a first control signal in response to the motion parameters of the vehicle being greater than a preset motion threshold; the pumping mechanism 10 is configured to output the working fluid along the first fluid outlet 115 and the second fluid outlet 114 simultaneously based on the first control signal; the second sub-infusion assembly 520 is configured to communicate the second fluid outlet port 114 with the differential lock mechanism 30 based on the first control signal.

Specifically, as set forth above, in the present embodiment, the electric drive mechanism 20 includes an electric drive assembly for driving the first and second actuators to operate, for example, the left and right drive wheels of the vehicle, a first actuator, and a second actuator. The differential lock mechanism 30 is respectively connected with the first executing mechanism and the second executing mechanism, and when the differential lock mechanism 30 executes the differential lock function, one of the first executing mechanism and the second executing mechanism is locked, so that the power of the electric drive assembly is fully concentrated on the other executing mechanism, and the vehicle can realize the escape self-rescue under the limit working condition.

In this embodiment, the processing circuit obtains the motion parameters of the vehicle, where the motion parameters include the absolute value of the rotational speed difference between the first executing mechanism and the second executing mechanism, when the absolute value of the rotational speed difference is greater than the preset rotational speed difference threshold, the processing circuit determines that the vehicle is currently under the limiting condition, and based on the processing circuit, outputs the first control signal to the liquid pumping mechanism 10 and the second infusion assembly 500 (for example, the first control signal is output to the liquid pumping mechanism 10 and the first switch valve 520a or the second switch valve 530 a), so as to control the liquid pumping mechanism 10 to simultaneously output the working liquid along the first liquid outlet 115 and the second liquid outlet 114, and simultaneously control the liquid outlet of the second infusion assembly 500 to communicate with the differential lock mechanism 30, so that the differential lock mechanism 30 can quickly implement the differential lock function (wherein, the differential lock mechanism 30 can implement the differential lock function in a manner that the differential lock mechanism 30 is driven by the liquid supply system 50, which is not described in detail herein). It should be noted that, in some embodiments, the pumping mechanism 10 may be in an operating state all the time, and the processing circuit only needs to output the first control signal to control the second infusion assembly 500 to perform the operation in the above manner.

When the absolute value of the rotational speed difference is smaller than or equal to the preset rotational speed difference threshold value, the processing circuit determines that the vehicle is trapped, and based on the second control signal output by the processing circuit, the second infusion assembly 500 is controlled to disconnect the liquid outlet of the second infusion assembly 500 from the differential lock mechanism 30, so that the differential lock mechanism 30 is controlled to stop working, and the vehicle is enabled to resume the normal running state. In this embodiment, the liquid pumping mechanism 10 is not controlled to stop working by the vehicle post-treatment circuit after the vehicle gets rid of the trapping state, or the liquid pumping mechanism 10 is controlled to stop working after the vehicle gets rid of the trapping state for a certain time, based on this, the liquid supply system 50 can cool and lubricate the electric driving mechanism 20 through the first infusion subassembly 510 after the vehicle gets rid of the trapping state, so as to ensure that the electric driving mechanism 20 can normally and stably run after the vehicle gets rid of the trapping state, and effectively improve the running stability of the vehicle.

Different from the prior art, the processing circuit is based on the motion parameters of the vehicle, such as the absolute value of the rotation speed difference, and can be used as the opening condition of the differential function of the differential lock mechanism 30, so that the phenomenon that the vehicle is stopped under the limit working condition to increase the difficulty of getting rid of the vehicle and the like can be effectively prevented, and the getting rid of the vehicle efficiency under the limit working condition can be effectively improved.

The application provides an electric drive system, which comprises a liquid supply system 50, an electric drive mechanism 20 and a differential lock mechanism 30 connected with the electric drive mechanism 20, wherein the liquid supply system 50 is respectively connected with the electric drive mechanism 20 and the differential lock mechanism 30.

Optionally, the electric drive mechanism 20 includes: the electric drive assembly, the first actuating mechanism and the second actuating mechanism are connected with the differential lock mechanism 30; wherein, the differential lock mechanism 30 is used for selectively controlling the first actuating mechanism to be in transmission connection with the electric drive assembly; and/or differential lock mechanism 30 is used to selectively control the drive connection of the second actuator to the electric drive assembly.

Specifically, as set forth above, the electric drive assembly is configured to drive a first actuator comprising one or more of all of the drive wheels of the vehicle and a second actuator comprising one or more of the drive wheels of the vehicle, such as in some embodiments the first actuator being a left drive wheel of the vehicle and the second actuator being a right drive wheel of the vehicle. The differential lock mechanism 30 is respectively connected with the first executing mechanism and the second executing mechanism, and when the differential lock mechanism 30 executes the differential lock function, one of the first executing mechanism and the second executing mechanism is locked, so that the power of the electric drive assembly is fully concentrated on the other executing mechanism, and the vehicle can realize the escape self-rescue under the limit working condition. Wherein the fluid supply system 50 is operable to provide hydraulic pressure to the differential lock mechanism 30 to drive the differential lock mechanism 30 to perform a differential lock function. The electric drive assembly comprises electric drive equipment for driving a motor and other vehicles.

The present application also provides a vehicle comprising an electric drive system as set forth in any one of the embodiments above.

To sum up, the liquid pumping mechanism 10 of the present application includes: the housing assembly 100 and the compression assembly 200. The housing assembly 100 is provided with a pressurizing chamber 116, a first liquid outlet 115 and a second liquid outlet 114 which are isolated from each other; one of the first liquid outlet 115 and the second liquid outlet 114 is connected to the electric drive mechanism 20, and the other is connected to the differential lock mechanism 30; the pressurizing assembly 200 is disposed in the pressurizing chamber 116, and the pressurizing assembly 200 is used for pressurizing the working fluid in the pressurizing chamber 116 to output the working fluid along the first liquid outlet 115 and the second liquid outlet 114, respectively. In this way, the pumping mechanism 10 can provide mutually independent working fluid flow paths for a plurality of working mechanisms, such as the electric driving mechanism 20 and the differential lock mechanism 30, so as to ensure that each working mechanism can efficiently and stably complete corresponding work, thereby completing the work of outputting mutually independent working fluid flow paths for a plurality of working mechanisms, which is only completed by matching a plurality of liquid supply mechanisms or matching a corresponding hydraulic element with a single liquid supply mechanism in the prior art, further effectively simplifying the combination structure of the liquid supply links (the liquid supply links are also referred to as the infusion assembly 500 in this document) of the liquid supply system 50, and saving the cost of the liquid supply system 50. Further, the first liquid outlet 115 is connected to the electric driving mechanism 20, the second liquid outlet 114 is connected to the differential lock mechanism 30, wherein the pump liquid mechanism 10 can output a working liquid according with hydraulic parameters of the working requirement of the electric driving mechanism 20 along the first liquid outlet 115 to lubricate and cool the electric driving mechanism 20, and output a working liquid according with hydraulic parameters of the working requirement of the differential lock mechanism 30 along the second liquid outlet 114 to drive the differential lock mechanism 30 to perform the differential lock function, based on which the differential lock mechanism 30 can be effectively ensured to lubricate and cool the electric driving mechanism 20 effectively when the differential lock mechanism 30 is in the differential lock function, thereby ensuring normal and stable operation of the electric driving system and improving the escaping capability of the electric driving system.

It should be noted that the drawings herein are only for illustrating the structural relationship and the connection relationship of the inventive product of the present application, and are not limited to the specific structural dimensions of the inventive product of the present application.

The foregoing description is only of embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (13)

1. The utility model provides a pump liquid mechanism, its characterized in that is used for the vehicle, the vehicle includes electric drive mechanism and with differential lock mechanism, pump liquid mechanism that electric drive mechanism connects, pump liquid mechanism includes:

the shell assembly is provided with a pressurizing cavity, a first liquid outlet and a second liquid outlet which are isolated from each other; one of the first liquid outlet and the second liquid outlet is connected with the electric driving mechanism, and the other is connected with the differential lock mechanism;

the pressurizing assembly is arranged in the pressurizing cavity and is used for pressurizing working fluid in the pressurizing cavity so that the working fluid is output along the first liquid outlet and the second liquid outlet respectively.

2. The fluid pumping mechanism of claim 1, wherein the pressurized chamber comprises a first sub-pressurized chamber and a second sub-pressurized chamber isolated from each other, the first sub-pressurized chamber in communication with the first fluid outlet port and the second sub-pressurized chamber in communication with the second fluid outlet port;

the pressurizing assembly includes:

the first pressurizing piece is arranged in the first sub-pressurizing cavity and is used for pressurizing working fluid in the first sub-pressurizing cavity;

the second pressurizing piece is arranged in the second sub-pressurizing cavity and is used for pressurizing working fluid in the second sub-pressurizing cavity.

3. The fluid pumping mechanism of claim 2, wherein the housing assembly is further provided with a drive chamber, the fluid pumping mechanism further comprising:

the driving assembly is arranged in the driving cavity, and a driving shaft of the driving assembly is respectively in transmission connection with the first pressing piece and the second pressing piece;

wherein the driving assembly is used for driving the first pressing piece and the second pressing piece simultaneously.

4. A liquid supply system comprising the liquid pumping mechanism of any one of claims 1-3, the liquid supply system further comprising:

an infusion set comprising:

The first sub-transfusion assembly is connected with the first liquid outlet and the electric driving mechanism;

the second sub-transfusion assembly is connected with the second liquid outlet and the differential lock mechanism;

wherein the first sub-infusion assembly is used for guiding working fluid to the electric drive mechanism so as to lubricate the electric drive mechanism; the second sub-infusion assembly is used for selectively guiding working fluid to the differential lock mechanism so as to control the differential lock mechanism to work.

5. The fluid supply system of claim 4 wherein the second sub-infusion assembly is coupled to the electro-drive mechanism, the second sub-infusion assembly further configured to direct a working fluid to the electro-drive mechanism.

6. The fluid supply system of claim 5 wherein the second sub-infusion assembly comprises:

the first switch valve is respectively connected with the second liquid outlet, the electric drive mechanism and the differential lock mechanism;

the first switch valve is used for selectively communicating the second liquid outlet port with the differential lock mechanism; or (b)

The first switch valve is used for selectively communicating the second liquid outlet port with the electric drive mechanism.

7. The fluid supply system of claim 5 wherein the second sub-infusion assembly comprises:

the first end of the second switch valve is connected with the second liquid outlet, and the second end of the second switch valve is connected with the differential lock mechanism;

the first end of the overflow valve is connected with the second liquid outlet, and the second end of the overflow valve is connected with the electric driving mechanism;

the second switch valve is used for selectively communicating the second liquid outlet port with the differential lock mechanism; the overflow valve is used for responding to the fact that the hydraulic parameter of the second liquid outlet is larger than a preset threshold value, and the second liquid outlet is communicated with the electric driving mechanism.

8. The liquid supply system of claim 5, further comprising:

the liquid cooler is respectively connected with the electric driving mechanism, the first infusion subassembly and the second infusion subassembly, and is used for cooling the working liquid input into the electric driving mechanism.

9. The liquid supply system of claim 4, wherein the liquid supply system further comprises: the processing circuit is respectively connected with the liquid pumping mechanism and the second sub-transfusion assembly;

The processing circuit is used for acquiring the motion parameters of the vehicle and outputting a first control signal in response to the motion parameters of the vehicle being greater than a preset motion threshold;

the liquid pumping mechanism is used for outputting working liquid along the first liquid outlet and the second liquid outlet simultaneously based on the first control signal; the second sub-infusion assembly is used for communicating the second liquid outlet and the differential lock mechanism based on the first control signal.

10. The fluid supply system of claim 9 wherein the electric drive mechanism comprises a first actuator and a second actuator, the differential lock mechanism is coupled to the first actuator and the second actuator, respectively, and the motion parameter comprises an absolute value of a rotational speed difference between the first actuator and the second actuator.

11. An electric drive system, characterized by comprising the liquid supply system according to any one of claims 4-10, the electric drive mechanism and a differential lock mechanism connected with the electric drive mechanism, wherein the liquid supply system is respectively connected with the electric drive mechanism and the differential lock mechanism.

12. The electro-mechanical system of claim 11, wherein the electro-mechanical mechanism comprises:

The electric drive assembly is connected with the differential lock mechanism;

a first actuator;

a second actuator;

the differential lock mechanism is used for selectively controlling the first executing mechanism to be in transmission connection with the electric drive assembly; and/or

The differential lock mechanism is used for selectively controlling the second executing mechanism to be in transmission connection with the electric drive assembly.

13. A vehicle comprising an electric drive system according to claim 11 or 12.