Oil reservoir, hydraulic system and vehicle

Abstract

The utility model discloses an oil storage pool, a hydraulic system and a vehicle. The oil storage pool comprises a shell, a first blocking arm and a second blocking arm. Wherein the shell is provided with a flow guide cavity and an oil suction cavity which are communicated with each other, a suction filter is suitable for being placed in the oil suction cavity, a first oil return port and an oil outlet are formed in the top wall of the shell, the first oil return port is communicated with the flow guide cavity and used for enabling oil of a clutch pressure oil way to flow back to the flow guide cavity, the oil outlet is communicated with the oil suction cavity, and an exhaust port is formed in the top wall of the shell and used for exhausting oil of the clutch pressure oil way. The exhaust port is respectively communicated with the flow guide cavity and the oil suction cavity; the first blocking arm and the second blocking arm are arranged on the two opposite side walls of the flow guide cavity correspondingly, and both the first blocking arm and the second blocking arm obliquely extend towards the bottom wall of the shell. According to the oil reservoir, the pressure stability of the clutch pressure oil path is guaranteed, the clutch can transmit torque more stably, and the driving feeling of the whole vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an oil storage tank, a hydraulic system and a vehicle. Background Art

[0002] With the development of hybrid vehicles, each vehicle manufacturer has launched a dedicated hybrid transmission. In the era when the research technologies of hybrid dedicated transmissions are blooming, the control methods of dual-motor multi-gear and the control methods of directly controlling clutches and cooling lubrication with dual electronic pumps have gradually occupied a place.

[0003] In related technologies, in the hydraulic system that directly controls the clutch for torque transmission by an electronic pump, there is a fatal problem, that is, when air bubbles enter the clutch, the air bubbles are most likely to be discharged from the throttle hole position. However, the direct discharge of air bubbles will directly cause the pressure to drop or even fluctuate. The reason is that when air bubbles need to be discharged, the density of the oil in this period is smaller than the density of the pure oil in the previous period. According to the flow characteristics, when the density of the medium is small, the flow velocity will increase. As a result, within the same period, the oil carrying air bubbles is discharged faster than the pure oil, and the volume quickly discharged in the oil passage needs to be supplemented by the electronic pump. Therefore, a short-term pressure drop or even fluctuation will occur. This problem will generate different pressure drop values according to the volume of the air bubbles, which will directly affect the torque transmission of the clutch, and will affect the driving experience of the whole vehicle at least, and may even directly cause the engine to stop abnormally at worst. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the first object of the utility model is to provide an oil storage tank to ensure the pressure stability of the clutch pressure oil circuit, make the clutch transmit torque more smoothly, and improve the driving experience of the whole vehicle.

[0005] The second object of the utility model is to provide a hydraulic system adopting the above oil storage tank.

[0006] The third object of the utility model is to provide a vehicle adopting the above hydraulic system.

[0007] According to some embodiments of the present utility model, it includes: a housing having a flow guiding cavity and an oil suction cavity communicating with each other. An oil suction filter is adapted to be placed in the oil suction cavity. A first oil return port and an oil outlet are formed on the top wall of the housing. The first oil return port communicates with the flow guiding cavity for returning the oil in the clutch pressure oil circuit to the flow guiding cavity, and the oil outlet communicates with the oil suction cavity; a first blocking arm and a second blocking arm are respectively arranged on two opposite side walls of the flow guiding cavity, and both the first blocking arm and the second blocking arm extend obliquely towards the bottom wall of the housing; wherein, an exhaust port is formed on the top wall of the housing, and the exhaust port communicates with the flow guiding cavity and the oil suction cavity respectively.

[0008] The oil storage tank according to the embodiment of the present utility model can exhaust the oil before it enters the oil suction filter, avoiding the pressure drop or even fluctuation of the pressure oil circuit caused by the oil with bubbles flowing in the clutch pressure oil circuit, enabling the clutch to transmit torque more smoothly, improving the driving experience of the whole vehicle, and avoiding the abnormal shutdown of the engine.

[0009] According to some embodiments of the present utility model, the first blocking arm and the second blocking arm are arranged in a staggered manner in the height direction of the housing, lengthening the flow path of the oil, further ensuring the probability of bubble precipitation in the oil, enabling the oil to flow smoothly, and ensuring the reliability of the oil storage tank.

[0010] According to some embodiments of the present utility model, a blocking plate is arranged in the flow guiding cavity. The blocking plate divides the flow guiding cavity into a labyrinth cavity and a thrust cavity. The thrust cavity is located between the labyrinth cavity and the oil suction cavity. The second blocking arm is arranged on the side wall of the blocking plate adjacent to the labyrinth cavity. The first oil return port communicates with the labyrinth cavity; wherein, the bottom of the blocking plate is spaced apart from the bottom wall of the housing, and the blocking plate and the bottom wall of the housing jointly define an oil communication port, further ensuring the probability of bubble precipitation in the oil.

[0011] According to some embodiments of the present utility model, there are multiple second blocking arms, and the multiple second blocking arms are spaced apart in the height direction of the housing. The second blocking arm adjacent to the bottom wall of the housing among the multiple second blocking arms is an end blocking arm; the minimum distance between the end blocking arm and the bottom wall of the housing in the height direction of the housing is less than the minimum distance between the blocking plate and the bottom wall of the housing, ensuring the smooth flow of the oil in the thrust cavity and avoiding the accumulation of oil at the oil communication port.

[0012] According to some embodiments of the present utility model, the top of the baffle is spaced apart from the top wall of the housing, and the baffle and the top wall of the housing jointly define a ventilation port. The maze cavity is communicated with the exhaust port through the ventilation port, so as to prevent bubbles from accumulating in the maze cavity.

[0013] According to some embodiments of the present utility model, a plurality of third baffle arms are provided in the oil suction cavity, and the plurality of third baffle arms are respectively arranged on two opposite side walls of the oil suction cavity. One end of each third baffle arm is connected to the side wall of the oil suction cavity, and the other end of each third baffle arm extends obliquely towards the top wall of the housing, ensuring the subsequent smooth flow of the oil fluid and further reducing the generation of new bubbles.

[0014] According to some embodiments of the present utility model, the plurality of third baffle arms are arranged adjacent to the bottom wall of the housing, and the plurality of third baffle arms divide the oil suction cavity into a first sub-cavity and a second sub-cavity arranged along the height direction of the housing. The oil outlet is communicated with the first sub-cavity, and the second sub-cavity is adapted to place the oil suction filter. The oil suction filter can uniformly extract the oil fluid, further ensuring the pressure stability of the clutch pressure oil circuit.

[0015] According to some embodiments of the present utility model, a second oil return port is formed on the top wall of the housing, and the second oil return port is communicated with the diversion cavity for enabling the oil fluid of the clutch lubricating oil circuit to flow to the diversion cavity. Among them, the exhaust port is arranged between the first oil return port and the oil outlet, and the second oil return port is arranged on the side of the first oil return port away from the exhaust port, increasing the source mode of the oil fluid, enabling more oil fluid to participate in the circulation, improving the utilization rate of the oil fluid, and at the same time supplementing the oil fluid of the branch of the lubricating oil circuit to the oil storage tank, further reducing the probability of bubbles entering the pressure oil circuit of the clutch, ensuring the pressure stability of the clutch pressure oil circuit, and improving the performance of the clutch.

[0016] The hydraulic system according to the second aspect embodiment of the present utility model includes the oil storage tank according to the first aspect embodiment of the present utility model described above.

[0017] The vehicle according to the third aspect embodiment of the present utility model includes the hydraulic system according to the second aspect embodiment of the present utility model described above.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of an oil storage tank according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of an oil storage tank and oil flow according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of a hydraulic system according to an embodiment of the present invention.

[0023] Explanation of reference numerals:

[0024] 100, oil storage tank; 1, housing; 11, diversion chamber; 111, labyrinth chamber; 112, thrust chamber; 12, oil suction chamber; 121, first sub-chamber; 122, second sub-chamber; 13, first oil return port; 14, oil outlet; 15, exhaust port; 16, oil fluid connection port; 17, ventilation port; 18, second oil return port; 2, first blocking arm; 3, second blocking arm; 4, end blocking arm; 5, blocking plate; 6, third blocking arm; 7, suction filter; 200, hydraulic system; 8, clutch. Specific embodiments

[0025] The following will describe in detail the embodiments of the present invention. The embodiments described with reference to the drawings are exemplary. The following will refer to Figures 1 - 3 Describe the oil storage tank 100 according to the first aspect embodiment of the present invention.

[0026] As Figure 1 and Figure 2 shown, the oil storage tank 100 according to the first aspect embodiment of the present invention includes a housing 1, a first blocking arm 2 and a second blocking arm 3.

[0027] Specifically, the housing 1 has a diversion cavity 11 and an oil suction cavity 12 that communicate with each other. An oil suction filter 7 is adapted to be placed in the oil suction cavity 12. A first oil return port 13 and an oil outlet 14 are formed on the top wall of the housing 1. The first oil return port 13 communicates with the diversion cavity 11 and is used to return the oil in the pressure oil circuit of the clutch 8 to the diversion cavity 11. The oil outlet 14 communicates with the oil suction cavity 12. An exhaust port 15 is formed on the top wall of the housing 1, and the exhaust port 15 communicates with both the diversion cavity 11 and the oil suction cavity 12. The first blocking arm 2 and the second blocking arm 3 are respectively arranged on two opposite side walls of the diversion cavity 11, and both the first blocking arm 2 and the second blocking arm 3 extend obliquely towards the bottom wall of the housing 1.

[0028] For example, in Figure 1 the example of, the housing 1 of the oil sump 100 is generally a cuboid cavity structure. The diversion cavity 11 and the oil suction cavity 12 can be arranged along the flow direction of the oil, that is, the oil can first flow back from the first oil return port 13 on the top wall of the housing 1 into the diversion cavity 11, and then flow to the oil suction cavity 12 and flow out from the oil outlet 14. The first blocking arm 2 and the second blocking arm 3 can be arranged on two side walls of the housing 1 in the oil flow direction (for example, Figure 1 the left - right direction in), and both the first blocking arm 2 and the second blocking arm 3 can extend obliquely downward towards the bottom wall of the housing 1, and the free ends of the first blocking arm 2 and the second blocking arm 3 are spaced apart.

[0029] When the oil in the pressure oil circuit of the clutch 8 flows back into the diversion cavity 11 through the first oil return port 13, and the oil flows from the gap between the first blocking arm 2 and the second blocking arm 3 towards the bottom wall of the housing 1 through the diversion of the first blocking arm 2 and the second blocking arm 3, since the gap between the first blocking arm 2 and the second blocking arm 3 is small, the air bubbles in the oil are blocked by the first blocking arm 2 and the second blocking arm 3. At this time, the air bubbles in the oil are precipitated and discharged from the oil sump 100 through the exhaust port 15. After the air - exhausted oil flows from the diversion cavity 11 into the oil suction cavity 12, it can be pumped and used by the oil suction filter 7 placed in the oil suction cavity 12, so that the oil flowing to the clutch 8 is free of air bubbles.

[0030] Thus, the oil sump 100 can exhaust the oil before it enters the oil suction filter 7, avoiding the situation that the oil carrying air bubbles flows in the pressure oil circuit of the clutch 8, resulting in pressure drop or even fluctuation in the pressure oil circuit, enabling the clutch 8 to transmit torque more smoothly, improving the driving experience of the whole vehicle, and avoiding abnormal engine shutdown.

[0031] In the prior art, when a hybrid vehicle needs to start the engine under the electric drive condition, one way is that the vehicle has a 12V starter which can start the engine without pressure, and then transmits power through speed regulation and engagement of the clutch 8. However, due to cost issues, generally the 12V starter of the engine is removed from the vehicle, resulting in the need to use the P1 motor (two-wheel drive P1+P3) or the P2 motor (four-wheel drive P2+P4) to start the engine. At this time, when using the P2 motor to start, since the P2 motor is simultaneously involved in driving, the clutch 8 cannot be directly pressed tightly, and it is necessary to slip and transmit torque to start the engine. The advantages of using the oil storage tank 100 of the present application in this hydraulic system under this condition will be reflected, that is, the gas content of the oil flowing from the oil outlet 14 of the oil suction chamber 12 to the pressure oil circuit of the clutch 8 is small, and there will be no problems of pressure fluctuation and drop in the pressure oil circuit of the clutch 8, thereby ensuring that the clutch 8 can smoothly slip and transmit torque to meet the starting requirements of the engine.

[0032] In addition, in the prior art, most of the oil comes from the oil pan of the transmission. Due to the high-speed rotation of the gears stirring the oil, the bubble content in the oil will increase, and larger bubbles will have the opportunity to enter the pressure oil circuit of the clutch 8. The oil storage tank 100 provided by the present invention can separate the oil from the gears. The oil after exhausting air in the oil storage tank 100 is directly connected to the pressure oil circuit of the clutch 8 through the oil suction filter 7, which can effectively reduce the probability of bubbles generated by the stirring of the internal shafts and gears of the transmission entering the pressure oil circuit of the clutch 8, ensure the pressure stability of the pressure oil circuit of the clutch 8, and improve the performance of the clutch 8.

[0033] According to the oil storage tank 100 of the embodiment of the present invention, by arranging the first blocking arm 2 and the second blocking arm 3 in the diversion cavity 11, the first blocking arm 2 and the second blocking arm 3 can block the passage of bubbles in the oil, so that the bubbles in the oil can be smoothly separated out and discharged through the exhaust port 15. Thus, the oil storage tank 100 can reduce the probability of bubbles in the oil entering the pressure oil circuit of the clutch 8, ensure the pressure stability of the pressure oil circuit of the clutch 8, enable the clutch 8 to transmit torque more smoothly, and improve the driving experience of the whole vehicle.

[0034] According to some embodiments of the present invention, in the height direction of the housing 1 (for example, Figure 1 the up and down direction in

[0035] Among them, the first blocking arm 2 and the second blocking arm 3 are arranged in an interleaved manner. While guiding the flow of the oil fluid, the flow path of the oil fluid is lengthened, further ensuring the probability of bubble precipitation in the oil fluid. In addition, both the first blocking arm 2 and the second blocking arm 3 extend obliquely towards the bottom wall of the housing 1, preventing the oil fluid from accumulating on the first blocking arm 2 and the second blocking arm 3, enabling the oil fluid to flow smoothly and ensuring the reliability of the oil storage tank 100.

[0036] Furthermore, a baffle plate 5 is provided in the diversion cavity 11. The baffle plate 5 divides the diversion cavity 11 into a labyrinth cavity 111 and a thrust cavity 112. The thrust cavity 112 is located between the labyrinth cavity 111 and the oil suction cavity 12. The second blocking arm 3 is provided on the side wall of the baffle plate 5 adjacent to the labyrinth cavity 111. The first oil return port 13 is communicated with the labyrinth cavity 111. Among them, the bottom of the baffle plate 5 is spaced apart from the bottom wall of the housing 1, and the baffle plate 5 and the bottom wall of the housing 1 jointly define an oil fluid communication port 16.

[0037] Specifically, after the oil fluid flows from the second blocking arm 3 to the bottom wall of the housing 1, it can flow into the thrust cavity 112 from the oil fluid communication port 16. As the oil fluid entering the thrust cavity 112 gradually increases, the liquid level of the oil fluid in the thrust cavity 112 gradually rises until the oil fluid flows into the oil suction cavity 12 from the top of the side wall of the thrust cavity 112 adjacent to the oil suction cavity 12. During the process of the liquid level of the oil fluid rising in the thrust cavity 112, the bubbles in the oil fluid can converge to the surface of the oil fluid under the action of the oil fluid push and be discharged from the exhaust port 15. Thus, the setting of the thrust cavity 112 further ensures the probability of bubble precipitation in the oil fluid.

[0038] According to some specific embodiments of the present invention, there are multiple second blocking arms 3. In the description of the present invention, the meaning of "multiple" is two or more. The multiple second blocking arms 3 are spaced apart along the height direction of the housing 1. The second blocking arm 3 adjacent to the bottom wall of the housing 1 among the multiple second blocking arms 3 is an end blocking arm 4. The minimum distance between the end blocking arm 4 and the bottom wall of the housing 1 in the height direction of the housing 1 is less than the minimum distance between the baffle plate 5 and the bottom wall of the housing 1.

[0039] For example, in Figures 1 - 3In the example, the first blocking arm 2 and the second blocking arm 3 can both be two. The two second blocking arms 3 are spaced apart in the height direction of the housing 1, and the two first blocking arms 2 are both located above the two second blocking arms 3, which can further lengthen the flow path of the oil fluid and increase the precipitation probability of the bubbles in the oil fluid. Among them, by making the minimum distance between the end blocking arm 4 and the bottom wall of the housing 1 less than the minimum distance between the baffle plate 5 and the bottom wall of the housing 1, the minimum distance between the end blocking arm 4 and the bottom wall of the housing 1 is smaller, and the flow rate of the oil fluid increases when it flows through the space between the end blocking arm 4 and the bottom wall of the housing 1, which can play a role in pushing the oil fluid that first enters the thrust chamber 112, ensuring the smooth flow of the oil fluid in the thrust chamber 112. The distance between the baffle plate 5 and the bottom wall of the housing 1 is larger, and the oil fluid can flow from the labyrinth chamber 111 into the thrust chamber 112 as soon as possible, avoiding the accumulation of the oil fluid at the oil fluid communication port 16.

[0040] According to some embodiments of the present invention, such as Figures 1 - 3 As shown, the top of the baffle plate 5 is spaced apart from the top wall of the housing 1. The baffle plate 5 and the top wall of the housing 1 jointly define a ventilation port 17. The labyrinth chamber 111 is communicated with the exhaust port 15 through the ventilation port 17. The bubbles precipitated from the oil fluid in the labyrinth chamber 111 can be guided by the ventilation port 17 to flow towards the exhaust port 15, and then flow out of the oil storage tank 100, avoiding the accumulation of the bubbles in the labyrinth chamber 111.

[0041] Optionally, a flow guiding plate (not shown in the figure) is provided between the thrust chamber 112 and the oil suction chamber 12, and the top of the flow guiding plate is lower than the top of the baffle plate 5. The oil fluid can flow from the thrust chamber 112 into the oil suction chamber 12 through the flow guiding plate. The top of the flow guiding plate is lower than the top of the baffle plate 5, avoiding the oil fluid in the thrust chamber 112 from flowing back to the labyrinth chamber 111 from the top of the baffle plate 5 during the process of the liquid level rising in the thrust chamber 112, resulting in a decrease in the exhaust efficiency due to some oil fluid flowing through the repeated flow path.

[0042] According to some embodiments of the present invention, a plurality of third blocking arms 6 are provided in the oil suction chamber 12. The plurality of third blocking arms 6 are respectively arranged on two opposite side walls of the oil suction chamber 12. One end of each third blocking arm 6 is connected to the side wall of the oil suction chamber 12, and the other end of each third blocking arm 6 extends obliquely towards the top wall of the housing 1. The oil fluid flowing from the thrust chamber 112 into the oil suction chamber 12 first contacts the third blocking arm 6 adjacent to the thrust chamber 112. Since the third blocking arm 6 extends obliquely towards the top wall of the housing 1, the oil fluid accumulates on the third blocking arm 6. When the oil fluid entering the oil suction chamber 12 gradually increases, the oil fluid on the third blocking arm 6 then flows to the space between the third blocking arm 6 and the bottom wall of the housing 1.

[0043] With such a setting, the third blocking arm 6 can further increase the movement path of the oil fluid. And because the third blocking arm 6 is inclined, it avoids the direct contact between the oil fluid and the bottom wall of the housing 1, thus preventing liquid turbulence and further generating more bubbles. In addition, since the third blocking arm 6 extends obliquely towards the top wall of the housing 1, the flow rate of the oil fluid in contact with the third blocking arm 6 can be reduced, ensuring the subsequent smooth flow of the oil fluid and further reducing the generation of new bubbles.

[0044] According to some specific embodiments of the present invention, a plurality of third blocking arms 6 are arranged adjacent to the bottom wall of the housing 1. The plurality of third blocking arms 6 divide the oil suction cavity 12 into a first sub-cavity 121 and a second sub-cavity 122 arranged along the height direction of the housing 1. The oil outlet 14 is communicated with the first sub-cavity 121, and the second sub-cavity 122 is adapted to place the oil suction filter 7.

[0045] Specifically, referring to Figures 1 - 3 , there are two third blocking arms 6, and the two third blocking arms 6 are respectively arranged on two side walls in the width direction of the oil suction cavity 12 (for example, Figure 1 the left-right direction in []). The two third blocking arms 6 divide the oil suction cavity 12 into a first sub-cavity 121 and a second sub-cavity 122. The third blocking arm 6 can block the oil fluid flowing towards the second sub-cavity 122, slow down the flow rate of the oil fluid, and avoid the accumulation of the oil fluid due to the continuous inflow of the oil fluid into the first sub-cavity 121. At the same time, since the oil suction filter 7 is placed in the second sub-cavity 122 and can directly extract the oil fluid in the second sub-cavity 122, the oil fluid with a slow flow rate can enable the oil suction filter 7 to extract the oil fluid evenly. And the oil fluid is connected to the pressure oil circuit of the clutch 8 through the oil outlet 14, which can ensure the pressure stability of the pressure oil circuit of the clutch 8.

[0046] According to some embodiments of the present invention, a second oil return port 18 is formed on the top wall of the housing 1. The second oil return port 18 is communicated with the diversion cavity 11 and is used to return the oil fluid in the lubricating oil circuit of the clutch 8 to the diversion cavity 11. Among them, the exhaust port 15 is arranged between the first oil return port 13 and the oil outlet 14, and the second oil return port 18 is arranged on the side of the first oil return port 13 away from the exhaust port 15. The common setting of the first oil return port 13 and the second oil return port 18 can increase the source mode of the oil fluid, enable more oil fluid to participate in the cycle, and improve the utilization rate of the oil fluid.

[0047] In this embodiment, the first oil return port 13 is communicated with the pressure oil circuit of the clutch 8, and the second oil return port 18 is communicated with the lubricating oil circuit of the clutch 8. The rear end of the throttle orifice in the pressure oil circuit of the clutch 8 is directly connected to the oil storage tank 100, realizing the recycling of the oil fluid, thereby achieving the purpose of energy saving, improving the endurance of the whole vehicle. Moreover, the throttle orifice in the pressure oil circuit recycles the oil fluid in the pressure oil circuit, reducing the amount of external oil fluid required for the pressure oil circuit. Therefore, the amount of air bubbles entering the pressure oil circuit is reduced, improving the pressure stability of the pressure oil circuit of the clutch 8. In addition, the second oil return port 18 is communicated with the lubricating oil circuit of the clutch 8, supplementing the oil fluid of the branch of the lubricating oil circuit to the oil storage tank 100, avoiding the direct influence of the gear stirring the oil fluid on the suction filter 7, further reducing the probability of air bubbles entering the pressure oil circuit of the clutch 8, ensuring the pressure stability of the pressure oil circuit of the clutch 8, and improving the performance of the clutch 8.

[0048] As Figure 3 shown, the hydraulic system 200 according to the second aspect embodiment of the present invention includes the oil storage tank 100 according to the first aspect embodiment above.

[0049] Specifically, when the hybrid vehicle needs to engage the clutch 8 for engine direct drive or generate electricity for the P2 motor, the clutch 8 needs to be tightened. At this time, theoretically, the requested pressure = the required pressure can meet the usage requirements of the engine. However, due to the pressure fluctuations and drops caused by air bubbles in the oil fluid, a certain amount of backup pressure needs to be increased, that is, the requested pressure = the required pressure + the maximum fluctuation value / drop value to meet the usage requirements of the engine. The reason is that air bubbles enter the pressure oil circuit of the clutch 8, resulting in pressure fluctuations and drops in the pressure oil circuit of the clutch 8. For the hydraulic system 200 provided by the present invention, the electronic pump provides the oil fluid, which enters the oil storage tank 100 through specific throttle orifices and branches. The oil fluid in the oil storage tank 100 will pass through the maze cavity 111, the thrust cavity 112 and the oil suction cavity 12, and finally be sucked into the pressure oil circuit of the clutch 8. At this time, since the air bubbles have separated when the oil fluid flows in the maze cavity 11 and the thrust cavity 112, it is ensured that the air content in the oil fluid in the oil suction cavity 12 is reduced. Therefore, the clutch 8 can smoothly slip and transmit torque to meet the starting requirements of the engine. When the pressure oil circuit of the clutch 8 is filled with oil fluid and the requested pressure = the required pressure, at this time, the oil fluid in the throttle orifice will be drained to the oil storage tank 100 through the oil passage for subsequent circulation. At this time, the flow path of the oil fluid will be in accordance with Figure 2 the direction indicated by the black arrow in Figure 2 and the separated air bubbles will be discharged in the direction indicated by the gray arrow in

[0050] According to the hydraulic system 200 of the embodiment of the present utility model, by adopting the above-mentioned oil storage tank 100, the probability of air bubbles in the oil entering the pressure oil circuit of the clutch 8 can be reduced, the pressure of the pressure oil circuit of the clutch 8 can be ensured to be stable, the clutch 8 can transmit torque more smoothly, and the driving experience of the whole vehicle is improved.

[0051] A vehicle (not shown in the figure) according to the embodiment of the third aspect of the present utility model includes the hydraulic system 200 according to the embodiment of the second aspect above.

[0052] According to the vehicle of the embodiment of the present utility model, by adopting the above-mentioned hydraulic system 200, the driving experience of the vehicle is improved, the problem of abnormal engine shutdown of the vehicle is avoided, and at the same time, the application working conditions of the vehicle are diversified.

[0053] The other constitutions and operations of the vehicle according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0054] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0055] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0058] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An oil storage tank, characterized in that: include: A housing, wherein the housing has a flow guiding cavity and an oil suction cavity which are connected to each other, wherein a suction filter is suitable for being placed in the oil suction cavity, and a first oil return port and an oil outlet are formed on the top wall of the housing, wherein the first oil return port is connected to the flow guiding cavity and is used to return the oil of the clutch pressure oil circuit to the flow guiding cavity, and the oil outlet is connected to the oil suction cavity; A first blocking arm and a second blocking arm, wherein the first blocking arm and the second blocking arm are respectively arranged on two side walls of the guide cavity that are opposite to each other, and the first blocking arm and the second blocking arm both extend obliquely toward the bottom wall of the housing; Wherein, an exhaust port is formed on the top wall of the shell, and the exhaust port is communicated with the guide cavity and the oil suction cavity respectively.

2. The oil storage tank according to claim 1, characterized in that: The first blocking arms and the second blocking arms are arranged alternately in the height direction of the housing.

3. The oil storage tank according to claim 2, characterized in that: A blocking plate is provided in the guide cavity, the blocking plate divides the guide cavity into a labyrinth cavity and a thrust cavity, the thrust cavity is located between the labyrinth cavity and the oil suction cavity, the second blocking arm is provided on a side wall of the blocking plate adjacent to the labyrinth cavity, and the first oil return port is communicated with the labyrinth cavity; The bottom of the blocking plate is spaced apart from the bottom wall of the shell, and the blocking plate and the bottom wall of the shell together define an oil communication port.

4. The oil storage tank according to claim 3, characterized in that: There are a plurality of second blocking arms, the plurality of second blocking arms are spaced apart along the height direction of the housing, and the second blocking arm adjacent to the bottom wall of the housing among the plurality of second blocking arms is an end blocking arm; A minimum distance between the end barrier arm and the bottom wall of the housing in a height direction of the housing is smaller than a minimum distance between the barrier plate and the bottom wall of the housing.

5. The oil storage tank according to claim 3, characterized in that: The top of the blocking plate is spaced apart from the top wall of the shell, and the blocking plate and the top wall of the shell together define a vent, and the labyrinth cavity is communicated with the exhaust port through the vent.

6. The oil storage tank according to any one of claims 1 to 5, characterized in that: A plurality of third barrier arms are provided in the oil suction chamber, and the plurality of third barrier arms are respectively provided on two side walls of the oil suction chamber opposite to each other, one end of each of the third barrier arms is connected to the side wall of the oil suction chamber, and the other end of each of the third barrier arms extends obliquely toward the top wall of the shell.

7. The oil storage tank according to claim 6, characterized in that: A plurality of the third blocking arms are arranged adjacent to the bottom wall of the shell, and the plurality of the third blocking arms divide the oil suction chamber into a first sub-chamber and a second sub-chamber arranged along the height direction of the shell, the oil outlet is connected to the first sub-chamber, and the second sub-chamber is suitable for placing the suction filter.

8. The oil storage tank according to claim 1, characterized in that: A second oil return port is formed on the top wall of the housing, the second oil return port is communicated with the guide cavity, and is used to allow the oil in the clutch lubricating oil circuit to flow into the guide cavity; Wherein, the exhaust port is arranged between the first oil return port and the oil outlet port, and the second oil return port is arranged on a side of the first oil return port away from the exhaust port.

9. A hydraulic system, characterized in that: The oil storage tank comprises the oil storage tank described in any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the hydraulic system as described in claim 9.

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