Hydraulic system

Abstract

The utility model discloses a hydraulic system which comprises a reduction gearbox, a brake and / or a clutch, a driving pump oil storage assembly, an oil feeding pipeline and an oil return pipeline, and an oil feeding port of the driving pump oil storage assembly is connected to the reduction gearbox, the brake and / or the clutch through the oil feeding pipeline. The reduction gearbox, the brake and / or the clutch are connected to an oil return opening of the same driving pump oil storage assembly through the oil return pipeline. When the hydraulic system works, the driving pump oil storage assembly provides power to send a working medium to the reduction gearbox for lubrication and to the brake and / or the clutch through the oil feeding pipeline so that the brake and / or the clutch can work. Meanwhile, working media in the reduction gearbox, the brake and / or the clutch can flow to the oil return opening of the driving pump oil storage assembly through the backflow pipeline, so that a hydraulic control system for the brake and / or the clutch and a lubricating system for the reduction gearbox are combined into a whole, the structure is simplified, and economic benefits are improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic system. Background Art

[0002] Vehicles are often equipped with brakes, clutches, and reduction gears. Brakes and clutches are usually hydraulically controlled by conveying hydraulic oil from the drive pump oil storage assembly to their actuators through pipelines. The reduction gearbox usually conveys lubricating oil to its chamber through pipelines. However, existing vehicles separate the brake and clutch hydraulic oil from the lubricating oil in the reduction gearbox. The former uses hydraulic oil as the working medium and belongs to the hydraulic system drive, while the latter uses lubricating oil as the working medium and belongs to the lubrication system. The two are two independent working systems, resulting in a complex structure, large occupied space, and high cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydraulic system in order to overcome the defects in the prior art that the hydraulic system and the lubrication system in the vehicle are two separate systems, resulting in a complex structure and high cost.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A hydraulic system comprises a reduction gearbox, a brake and / or a clutch, a drive pump oil storage assembly, an oil delivery pipeline and an oil return pipeline, wherein the oil delivery port of the drive pump oil storage assembly is respectively connected to the reduction gearbox, the brake and / or the clutch through the oil delivery pipeline, and the reduction gearbox, the brake and / or the clutch are all connected to the oil return port of the same drive pump oil storage assembly through the oil return pipeline.

[0006] In the present solution, when the hydraulic system is working, the driving pump oil storage assembly provides power to deliver the working medium through the oil delivery pipeline to the reduction box for lubrication and to the brake and / or clutch for the operation of the brake and / or clutch. At the same time, the working medium in the reduction box, the brake and / or the clutch can also flow to the return oil port of the driving pump oil storage assembly through the return pipeline, so that the hydraulic control system for the brake and / or the clutch and the lubrication system for the reduction box are combined into one, which simplifies the structural setting, reduces the space occupied by multiple systems, saves manufacturing costs and maintenance costs, and also reduces the possible oil leakage points and oil leakage amount, thereby improving economic benefits.

[0007] Preferably, the brake is connected to the oil supply pipeline and the oil return pipeline through a second electromagnetic reversing valve;

[0008] The clutch is connected to the oil supply pipeline and the oil return pipeline through a third electromagnetic reversing valve.

[0009] In this solution, the second electromagnetic reversing valve and the third electromagnetic reversing valve can change the connection state between different branches by powering on or off, which is convenient for intelligent control through the control panel to reduce manual operation. The second electromagnetic reversing valve and the third electromagnetic reversing valve change the connection state between the brake and / or clutch and the oil supply pipeline and the oil return pipeline by powering on or off, thereby switching the locking or unlocking state of the brake and the engagement or separation state of the clutch.

[0010] For example, when the second electromagnetic reversing valve is powered on, the oil port of the brake is connected to the oil supply pipeline, the working medium is introduced into the brake, the working state of the brake is switched, and the brake is locked or unlocked. When the second electromagnetic reversing valve is powered off, the oil port of the brake is connected to the oil return pipeline, so that the working medium in the brake quickly flows to the oil return port of the drive pump oil storage component through the oil return pipeline. As for the initial state of the brake, whether it is locked or unlocked, it depends on the user's setting.

[0011] For example, when the third electromagnetic reversing valve is powered on, the oil port of the clutch is connected to the oil delivery pipeline, the working medium is introduced into the clutch, the working state of the clutch is switched, and the clutch is engaged or disengaged. When the third electromagnetic reversing valve is powered off, the clutch oil port is connected to the oil return pipeline, so that the working medium in the clutch quickly flows to the oil return port of the drive pump oil storage component through the oil return pipeline. As for the initial state of the clutch, whether it is engaged or disengaged, it is also related to the user's setting.

[0012] Preferably, the brake is connected to the oil supply pipeline and the oil return pipeline through two or more parallel-connected second electromagnetic reversing valves;

[0013] Alternatively, the clutch is connected to the oil supply pipeline and the oil return pipeline through two or more third electromagnetic reversing valves connected in parallel.

[0014] In this solution, two parallel second electromagnetic reversing valves or two parallel third electromagnetic reversing valves can serve as backup for each other. When one of the electromagnetic reversing valves fails, it will not affect the braking function of the brake or the clutch or separation function, thereby improving the reliability of the hydraulic system.

[0015] Preferably, the hydraulic system further comprises an accumulator, and the accumulator is communicated with the oil delivery pipeline.

[0016] In this solution, the accumulator can store high-pressure working medium. After the driving pump oil storage component loses power, the high-pressure working medium stored in the accumulator can be released to provide emergency power and temporarily replace the driving pump oil storage component.

[0017] Preferably, a pressure sensor is installed on the oil delivery pipeline to detect the oil pressure in the oil delivery pipeline.

[0018] Preferably, the oil outlet of the reduction box is higher than the oil return port;

[0019] And / or, the hydraulic system further comprises a throttle valve, and the throttle valve is installed at the oil inlet of the reduction gearbox.

[0020] In this solution, the oil outlet of the reduction box is higher than the oil return port, and the working medium in the reduction box can flow back to the oil return port of the driving pump oil storage assembly by gravity, thereby completing automatic flushing of the reduction box.

[0021] A throttle valve is installed at the oil inlet of the reduction box. By adjusting the opening of the throttle valve, a sufficient amount of working medium is retained in the reduction box to prevent the working medium in the reduction box from being too little or too much, which affects the lubrication effect.

[0022] Preferably, a one-way valve is installed on the oil delivery pipeline, and the one-way valve is located between the drive pump oil storage assembly and the accumulator;

[0023] And / or, an oil inlet filter is installed on the oil delivery pipeline.

[0024] In this solution, a one-way valve is provided to allow the working medium to flow in one direction in the oil delivery pipeline, thereby preventing the working medium in the oil delivery pipeline from flowing back to the drive pump oil storage assembly. An oil inlet filter is installed on the oil delivery pipeline to filter out impurities in the oil and improve the cleanliness of the working medium, so as not to affect the lubrication of the reduction box, the normal operation of the brake and / or the clutch.

[0025] Preferably, a cooler is installed on the oil return pipeline;

[0026] And / or, an oil return filter is installed on the oil return pipeline.

[0027] In this solution, a cooler is provided to cool the working medium to prevent the oil temperature from being too high. An oil return filter is provided to filter out impurities in the oil to improve the cleanliness of the working medium.

[0028] Preferably, the driving pump oil storage assembly comprises a driving pump and an oil storage tank, the inlet of the driving pump is connected to the oil storage tank, the outlet of the driving pump is the oil delivery port, the oil storage tank is provided with the oil return port, and the oil storage tank is equipped with an air filter;

[0029] And / or, a liquid level and liquid temperature gauge is installed on the oil storage tank.

[0030] In this solution, the driving pump is used to deliver the working medium in the oil storage tank at high pressure through the oil delivery pipeline. An air filter is installed at the opening of the oil storage tank to make the pressure inside the oil storage tank consistent with the external pressure, and also to filter out impurities in the air to prevent impurities from entering the oil tank.

[0031] Preferably, a first electromagnetic reversing valve is installed between the oil supply pipeline and the oil return pipeline, and the first electromagnetic reversing valve is configured to disconnect the oil supply pipeline from the oil return pipeline when power is on, and connect the oil supply pipeline with the oil return pipeline when power is off.

[0032] In this solution, the first electromagnetic reversing valve can change the connection state between different branches by powering on or off. When powered on, the oil delivery pipeline is disconnected from the oil return pipeline, and the oil delivery pipeline is loaded. When powered off, the oil delivery pipeline is connected to the oil return pipeline, and the oil delivery pipeline is unloaded.

[0033] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0034] The positive progressive effect of the utility model is that when the hydraulic system is working, the driving pump oil storage component provides power to send the working medium through the oil delivery pipeline to the reduction box for lubrication and to the brake and / or clutch for the operation of the brake and / or clutch. At the same time, the working medium in the reduction box, the brake and / or the clutch can also flow to the return oil port of the driving pump oil storage component through the return pipeline, so that the hydraulic control system for the brake and / or the clutch and the lubrication system for the reduction box are combined into one, which simplifies the structural setting, reduces the space occupied by multiple systems, saves manufacturing costs and maintenance costs, and also reduces the points and amount of possible oil leakage, thereby improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of a hydraulic system according to a preferred embodiment of the present invention.

[0036] Figure 2 A schematic diagram of the local structure of a hydraulic system of a preferred embodiment of the utility model Figure 1 .

[0037] Figure 3 A schematic diagram of the local structure of a hydraulic system of a preferred embodiment of the utility model Figure 2 .

[0038] Figure 4 A schematic diagram of the local structure of a hydraulic system of a preferred embodiment of the utility model Figure 3 .

[0039] Description of reference numerals:

[0040] Gearbox 1

[0041] Brake 2

[0042] Clutch 3

[0043] Drive pump oil storage assembly 4

[0044] Drive pump 41

[0045] Oil tank 42

[0046] Oil delivery pipeline 5

[0047] Oil return line 6

[0048] The first electromagnetic reversing valve 71

[0049] Second electromagnetic reversing valve 72

[0050] The third electromagnetic reversing valve 73

[0051] Accumulator 8

[0052] Pressure sensor 9

[0053] Throttle valve 10

[0054] Check valve 11

[0055] Oil inlet filter 12

[0056] Oil suction filter 121

[0057] Cooler 13

[0058] Return oil filter 14

[0059] Air filter 15

[0060] Liquid level and temperature gauge 16

[0061] Second electromagnetic reversing valve 17

[0062] Electric proportional one-way pressure reducing valve 18

[0063] Stop valve 19

[0064] Pressure sensor 20

[0065] Temperature controller 21

[0066] Flow direction 100

[0067] A1-A4 to the brake oil port, B1-B4 to the clutch oil port, C1-C4 to the reducer oil inlet, T1-T4 to the reducer oil outlet DETAILED DESCRIPTION

[0068] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0069] like Figure 1-Figure 4As shown, this embodiment discloses a hydraulic system, which includes a reduction box 1, a brake 2 and a clutch 3, a driving pump oil storage assembly 4, an oil delivery pipeline 5 and an oil return pipeline 6. The oil delivery port of the driving pump oil storage assembly 4 is respectively connected to the reduction box 1, the brake 2 and the clutch 3 through the oil delivery pipeline 5, and the reduction box 1, the brake 2 and the clutch 3 are all connected to the oil return port of the same driving pump oil storage assembly 4 through the oil return pipeline 6. Of course, in other alternative embodiments, the brake and the clutch can be set selectively.

[0070] like Figure 1 As shown, when the hydraulic system is working, the driving pump oil storage component 4 provides power to send the working medium through the oil delivery pipeline 5 to the reduction box 1 for lubrication, and to the brake 2 and the clutch 3 for the operation of the brake 2 and the clutch 3. At the same time, the working medium in the reduction box 1, the brake 2 and the clutch 3 can also flow to the return oil port of the driving pump oil storage component 4 through the return pipeline, so that the hydraulic control system for the brake 2 and the clutch 3 and the lubrication system for the reduction box 1 are combined into one, which simplifies the structural setting, reduces the space occupied by multiple systems, saves manufacturing costs and maintenance costs, and also reduces the possible oil leakage points and oil leakage amount, thereby improving economic benefits.

[0071] like Figure 1 As shown, the brake 2 is connected to the oil supply pipeline 5 and the oil return pipeline 6 through the second electromagnetic reversing valve 72. The clutch 3 is connected to the oil supply pipeline 5 and the oil return pipeline 6 through the third electromagnetic reversing valve 73. The second electromagnetic reversing valve 72 and the third electromagnetic reversing valve 73 can change the connection state between different branches by powering on or off, which is convenient for intelligent control through the control panel to reduce manual operation. The second electromagnetic reversing valve 72 and the third electromagnetic reversing valve 73 change the connection state between the brake 2 and the clutch 3 and the oil supply pipeline 5 and the oil return pipeline 6 by powering on or off, thereby switching the locked or unlocked state of the brake 2 and the engaged or separated state of the clutch 3.

[0072] For example, when the second electromagnetic reversing valve 72 is powered on, the oil port of the brake 2 is connected to the oil supply pipeline, the working medium is introduced into the brake 2, the working state of the brake 2 is switched, and the brake 2 is locked or unlocked. When the second electromagnetic reversing valve 72 is powered off, the oil port of the brake 2 is connected to the oil return pipeline 6, so that the working medium in the brake 2 quickly flows to the oil return port of the drive pump oil storage assembly 4 through the oil return pipeline 6. As for the initial state of the brake 2, whether it is locked or unlocked, it depends on the user's setting.

[0073] For example, when the third electromagnetic reversing valve 73 is powered on, the oil port of the clutch 3 is connected to the oil delivery pipeline 5, the working medium is introduced into the clutch 3, the working state of the clutch 3 is switched, and the clutch 3 is engaged or disengaged. When the third electromagnetic reversing valve 73 is powered off, the oil port of the clutch 3 is connected to the oil return pipeline 6, so that the working medium in the clutch 3 quickly flows to the oil return port of the drive pump oil storage assembly 4 through the oil return pipeline 6. As for the initial state of the clutch 3, whether it is engaged or disengaged, it depends on the user's setting.

[0074] like Figure 1 As shown, the brake 2 is connected to the oil supply pipeline 5 and the oil return pipeline 6 through two parallel second electromagnetic reversing valves 72. Or the clutch 3 is connected to the oil supply pipeline 5 and the oil return pipeline 6 through two or more parallel third electromagnetic reversing valves 73. The two parallel second electromagnetic reversing valves 72 or the two parallel third electromagnetic reversing valves 73 can serve as backup for each other. When one of the electromagnetic reversing valves fails, the braking function of the brake 2 and the clutch or separation function of the clutch 3 are not affected, thereby improving the reliability of the hydraulic system.

[0075] like Figure 1 As shown, the hydraulic system further includes an accumulator 8, which is connected to the oil delivery pipeline 5. The accumulator 8 can store high-pressure working medium. After the driving pump oil storage component loses power, the valve on the accumulator 8 can be opened to release the high-pressure working medium stored in the accumulator 8 to the brake and clutch to provide emergency power and temporarily replace the driving pump oil storage component 4.

[0076] Preferably, a pressure sensor 9 is installed on the oil delivery pipeline 5 to detect the oil pressure in the oil delivery pipeline 5 .

[0077] The oil outlet of the reduction box 1 is higher than the oil return port, so that the working medium in the reduction box 1 can flow back to the oil return port of the driving pump oil storage assembly 4 by gravity, completing the automatic flushing of the reduction box 1.

[0078] The hydraulic system also includes a throttle valve 10, which is installed at the oil inlet of the reduction box 1. By adjusting the opening of the throttle valve 10, a sufficient amount of working medium is retained in the reduction box 1 to prevent the working medium in the reduction box 1 from being too little or too much, which affects the lubrication effect.

[0079] A one-way valve 11 is installed on the oil delivery pipeline 5. The one-way valve 11 is located between the drive pump oil storage assembly 4 and the accumulator 8, so that the working medium flows in one direction in the oil delivery pipeline 5 and prevents the working medium in the oil delivery pipeline 5 from flowing back to the drive pump oil storage assembly 4.

[0080] An oil inlet filter 12 is installed on the oil delivery pipeline 5 to filter out impurities in the oil and improve the cleanliness of the working medium so as not to affect the lubrication of the reduction box 1 and the normal operation of the brake 2 and the clutch 3.

[0081] A cooler 13 is installed on the oil return line 6 to cool the working medium and prevent the oil temperature from being too high, which would affect the normal operation of the brake 2 or the clutch 3 and the reduction box 1.

[0082] An oil return filter 14 is installed on the oil return pipeline 6 to filter out impurities in the oil and improve the cleanliness of the working medium.

[0083] like Figure 1 As shown, in this embodiment, the driving pump oil storage assembly 4 includes a driving pump 41 and an oil storage tank 42. The inlet of the driving pump 41 is connected to the oil storage tank 42, the outlet of the driving pump 41 is an oil delivery port, and an oil return port is provided on the oil storage tank 42. The driving pump 41 is used to deliver the working medium in the oil storage tank 42 at high pressure through the oil delivery pipeline 5, and the inner cavity of the oil storage tank 42 is used to store a certain amount of working medium to meet the circulating lubrication and hydraulic requirements of the hydraulic system.

[0084] An oil suction filter 121 is installed at the inlet of the driving pump 41 to protect the driving pump 41 .

[0085] An air filter 15 is installed on the oil storage tank 42 to make the pressure inside the oil storage tank 42 consistent with the external pressure, and also to filter out impurities in the air to prevent the impurities from entering the oil storage tank 42.

[0086] A liquid level and liquid temperature gauge 16 is installed on the oil storage tank 42 to display the liquid level and oil temperature of the working medium in the oil storage tank 42 .

[0087] A first electromagnetic reversing valve 71 is also installed between the oil supply pipeline 5 and the oil return pipeline 6. The first electromagnetic reversing valve 71 is configured to disconnect the oil supply pipeline 5 from the oil return pipeline 6 when the power is on, and to connect the oil supply pipeline 5 with the oil return pipeline 6 when the power is off. When the power is on, the oil supply pipeline 5 is disconnected from the oil return pipeline 6, and the oil supply pipeline 5 is loaded. When the power is off, the oil supply pipeline 5 is connected to the oil return pipeline 6, and the oil supply pipeline 5 is unloaded.

[0088] In order to regulate the oil pressure input to the brake 2, an electric proportional one-way pressure reducing valve 18 is installed on the oil delivery pipeline 5 at the front end of the brake 2, and a pressure sensor 20 for detecting the oil pressure is installed on the oil delivery pipeline 5 at the front end of the brake. If the oil pressure in the oil delivery pipeline 5 exceeds the preset pressure range, the electric proportional one-way pressure reducing valve 18 is opened to release the working medium into the oil storage tank 42.

[0089] Meanwhile, a temperature controller 21 is installed in the oil storage tank 42. The temperature controller 21 is used to control the oil temperature in the oil storage tank 42. When the oil temperature is too high, a cooling measure can be adopted to control the temperature of the working medium. For example, when the oil temperature is high, the cooler 13 is turned on, and when the oil temperature is too low, a resistance wire can be used for heating.

[0090] The flow direction 100 of the working medium is as follows Figure 1 As indicated by the arrow in .

[0091] In this embodiment, high-performance anti-wear hydraulic oil is selected as the working medium according to the vehicle body ambient temperature and working conditions.

[0092] In this embodiment, the number of brakes, clutches and reduction boxes is four, which are used to control the four wheels of the vehicle. Figure 3 and Figure 4 In the figure, multiple interfaces on the oil supply pipeline 5 and the oil return pipeline 6 are shown respectively, among which interfaces A1-A4 are the oil ports to the brake, interfaces B1-B4 are the oil ports to the clutch, interfaces C1-C4 are the oil inlets of the reducer, and interfaces T1-T4 are the oil outlets of the reducer.

[0093] In the description of this article, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0094] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A hydraulic system comprising a reduction box, a brake and / or a clutch, a drive pump oil storage assembly, an oil delivery pipeline and an oil return pipeline, characterized in that: The oil delivery port of the driving pump oil storage assembly is respectively connected to the reduction box, brake and / or clutch through the oil delivery pipeline, and the reduction box, brake and / or clutch are all connected to the oil return port of the same driving pump oil storage assembly through the oil return pipeline.

2. The hydraulic system according to claim 1, characterized in that: The brake is connected to the oil supply pipeline and the oil return pipeline through a second electromagnetic reversing valve; The clutch is connected to the oil supply pipeline and the oil return pipeline through a third electromagnetic reversing valve.

3. The hydraulic system according to claim 2, characterized in that: The brake is connected to the oil supply pipeline and the oil return pipeline through two or more parallel-connected second electromagnetic reversing valves; Alternatively, the clutch is connected to the oil supply pipeline and the oil return pipeline through two or more third electromagnetic reversing valves connected in parallel.

4. The hydraulic system according to claim 1, characterized in that: The hydraulic system further includes an accumulator, which is communicated with the oil delivery pipeline.

5. The hydraulic system according to claim 1, characterized in that: The oil outlet of the reduction box is higher than the oil return port; And / or, the hydraulic system further comprises a throttle valve, and the throttle valve is installed at the oil inlet of the reduction gearbox.

6. The hydraulic system according to claim 4, characterized in that: A one-way valve is installed on the oil delivery pipeline, and the one-way valve is located between the drive pump oil storage assembly and the accumulator; And / or, an oil inlet filter is installed on the oil delivery pipeline.

7. The hydraulic system according to claim 1, characterized in that: A cooler is installed on the oil return pipeline.

8. The hydraulic system according to claim 1, characterized in that: An oil return filter is installed on the oil return pipeline.

9. The hydraulic system according to claim 1, characterized in that: The driving pump oil storage assembly comprises a driving pump and an oil storage tank, the inlet of the driving pump is connected to the oil storage tank, the outlet of the driving pump is the oil delivery port, the oil storage tank is provided with the oil return port, and the oil storage tank is equipped with an air filter; And / or, the oil storage tank is equipped with a liquid level and liquid temperature gauge.

10. The hydraulic system according to any one of claims 1 to 9, characterized in that: A first electromagnetic reversing valve is also installed between the oil supply pipeline and the oil return pipeline. The first electromagnetic reversing valve is configured to disconnect the oil supply pipeline from the oil return pipeline when power is on, and connect the oil supply pipeline with the oil return pipeline when power is off.

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