Hydraulic assembly with multiple hydraulic outputs

Abstract

The utility model provides a hydraulic assembly with multiple hydraulic outputs. Comprising an oil tank, a first gear pump and a hydraulic driving system, wherein the first gear pump and the hydraulic driving system are sequentially connected with the oil tank; the first reversing valve can control the trend of the hydraulic oil to enable the execution element to complete corresponding actions; an oil inlet and an oil return port of the electromagnetic valve are respectively connected with two working oil ports of the first reversing valve, the electromagnetic valve is provided with two groups of working oil ports, and the two groups of working oil ports are respectively connected with the two groups of hydraulic output interfaces; and the switching among the oil inlet, the oil return port and the two groups of working oil ports is realized through the electromagnetic valves. According to the utility model, the use of two hydraulic outputs and the use of the fifth group of hydraulic outputs are freely switched through the switch button of the electromagnetic valve, so that one control lever of the tractor has multiple purposes, the switching of two groups of hydraulic output interfaces can be realized, the purpose of expanding the hydraulic output control is achieved, and the control comfort of a user is improved.

Description

Technical Field

[0001] The utility model relates to the field of tractors, in particular to a hydraulic assembly with multiple hydraulic outputs. Background Art

[0002] As the complexity of working conditions changes, the requirements for tractor hydraulic system performance and the use of equipment increase. Usually, adding a set of hydraulic outputs requires adding a control, a flexible shaft cable, a set of valve plates, and a joystick in the cab, which will limit the driver's space during operation, increase the difficulty of operation, and make it difficult to meet the driver's comfort.

[0003] After searching, the Chinese utility model patent (Announcement No.: CN 214945363 U) discloses a structure for increasing the number of tractor hydraulic output groups by connecting multi-way valves in series. Multi-way valve 2 is connected in series to the oil port of multi-way valve 1. The purpose of increasing the number of hydraulic output groups is achieved by controlling the two multi-way valves separately. The two multi-way valves can be arranged at different positions of the tractor to achieve a variety of hydraulic output combinations. From the perspective of the operation process, the utility model still uses an operating lever for control, and the above-mentioned technical problems still exist; from the perspective of product universality, the two multi-way valves have inconsistent structures, which increases the demand for parts replacement.

[0004] In the prior art, it is therefore necessary to provide a hydraulic assembly with multiple hydraulic outputs to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a hydraulic assembly with multiple hydraulic outputs.

[0006] According to the utility model, a hydraulic assembly with multiple hydraulic outputs is provided, comprising: an oil tank, a first gear pump connected to the oil tank in sequence, and a hydraulic drive system, wherein the hydraulic drive system comprises:

[0007] The first reversing valve can control the direction of the hydraulic oil so that the actuator can complete the corresponding action;

[0008] The solenoid valve has an oil inlet and an oil return port respectively connected to the two working oil ports of the first reversing valve. The solenoid valve has two groups of working oil ports, and the two groups of working oil ports are respectively connected to two groups of hydraulic output interfaces; the solenoid valve is used to realize switching between the oil inlet, the oil return port and the two groups of working oil ports.

[0009] Preferably, the solenoid valve has at least two working positions;

[0010] In the first working position, the oil inlet and the oil return port of the solenoid valve are respectively connected to one group of working oil ports;

[0011] In the second working position, the oil inlet and the oil return port of the solenoid valve are respectively connected to another group of working oil ports.

[0012] Preferably, the solenoid valve is connected to a switch button and is controlled by the switch button.

[0013] Preferably, the hydraulic drive system comprises: a plurality of first reversing valves and second reversing valves which are sequentially connected in parallel via a series oil circuit.

[0014] Preferably, the first reversing valve and the second reversing valve are respectively connected to different joysticks and controlled by the joysticks.

[0015] Preferably, the first reversing valve is a three-position valve, and its two working oil ports are connected to the solenoid valve or the hydraulic output interface;

[0016] The second reversing valve is a four-position valve, and its two working oil ports are connected to the lifting cylinder.

[0017] Preferably, one of the working oil ports of the first reversing valve and / or the second reversing valve is also connected to the oil return oil circuit via a branch oil circuit, and an on-off valve is arranged on the branch oil circuit.

[0018] Preferably, a one-way throttle valve is also arranged in series on the connecting oil circuit between the lifting cylinder and the working oil port of the second reversing valve.

[0019] Preferably, an oil suction filter is provided at the oil inlet end of the first gear pump, and a high-pressure oil filter is also provided at the oil outlet end of the first gear pump.

[0020] Preferably, it also includes:

[0021] The lubricating oil circuit has its inlet and outlet connected to the chassis transmission housing. The second gear pump, the radiator and the chassis lubrication internal oil channel are sequentially connected in series on the lubricating oil circuit. A second safety valve is also connected in parallel between the radiator and the second gear pump.

[0022] Compared with the prior art, the hydraulic assembly with multiple hydraulic outputs provided by the utility model has the following beneficial effects: the utility model freely switches the use of two hydraulic outputs and the fifth group of hydraulic outputs through the switch button of the solenoid valve, realizes the multi-purpose use of one joystick of the tractor, can realize the switching of two groups of hydraulic output interfaces, achieves the purpose of expanding the hydraulic output control, and increases the user's control comfort. Moreover, the newly added first reversing valve uses the same multi-way valve and control assembly as the first reversing valve of the original product, which is convenient for the market to replace parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Figure 1 It is a schematic diagram of the hydraulic principle of the hydraulic oil circuit of the utility model;

[0025] Figure 2 It is a schematic diagram of the hydraulic principle of the solenoid valve in the utility model.

[0026] Figure 3 It is a schematic diagram of the hydraulic principle of the first reversing valve in the utility model;

[0027] Figure 4 It is a schematic diagram of the hydraulic principle of the second reversing valve in the utility model.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. Hydraulic oil circuit; 11. Oil tank; 12. First gear pump; 13. Hydraulic drive system; 131. First reversing valve; 132. Second reversing valve; 133. Series oil circuit; 134. Solenoid valve; 135. Branch oil circuit; 136. First safety valve; 14. Oil suction filter; 15. High-pressure oil filter; 16. Hydraulic output interface; 161. Lifting cylinder; 162. One-way throttle valve; 2. Lubricating oil circuit; 21. Chassis transmission housing; 22. Second gear pump; 23. Radiator; 24. Chassis lubrication internal oil channel; 25. Second safety valve. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0035] See also Figure 1 This embodiment provides a hydraulic assembly with multiple hydraulic outputs, including a hydraulic oil circuit 1 and a lubricating oil circuit 2. The hydraulic oil circuit 1 includes an oil tank 11, a first gear pump 12 and a hydraulic drive system 13; the first gear pump 12 is connected to the hydraulic oil tank 11 and the hydraulic drive system 13 through the hydraulic oil circuit 1.

[0036] The hydraulic drive system 13 includes: a plurality of first reversing valves 131, a second reversing valve 132 and a first safety valve 136 connected in parallel via a serial oil circuit 133, and a solenoid valve 134 provided on the oil circuit where the first reversing valve 131 is located. The first reversing valve 131 can control the direction of the hydraulic oil so that the actuator can complete the corresponding action; see the attached Figure 2 , the solenoid valve 134 includes an oil inlet, an oil return port and two groups of working oil ports. The oil inlet and oil return port of the solenoid valve 134 are respectively connected to the two working oil ports of the first reversing valve 131. The solenoid valve 134 has two groups of working oil ports, and the two groups of working oil ports are respectively connected to two hydraulic output interfaces 16. The solenoid valve 134 is used to realize the switching between the oil inlet, the oil return port and the two groups of working oil ports. Specifically, the solenoid valve 134 has at least two working positions. In the first working position, the oil inlet and oil return port of the solenoid valve 134 are respectively connected to one group of working oil ports; in the second working position, the oil inlet and oil return port of the solenoid valve 134 are respectively connected to the other group of working oil ports. Moreover, the solenoid valve 134 is connected to a switch button, and is controlled by the switch button to switch its working position state.

[0037] In this embodiment, the first reversing valve 131 is provided with four groups, all of which are three-position reversing valves, preferably three-position six-way reversing valves, and the four groups of three-position six-way reversing valves are respectively connected to different joysticks, and the joysticks are used to control the reversal of the first reversing valve 131 to control the output direction of the hydraulic oil. Figure 3 The three-position six-way reversing valve includes an oil inlet, an oil return port, two bridge oil ports and two working oil ports; wherein the two working oil ports are connected to the solenoid valve 134 or the hydraulic output interface 16. When the three-position six-way valve is in the middle position, the two bridge oil ports are connected to conduct the hydraulic oil to the next reversing valve; when the three-position six-way valve is in the left position, the two bridge oil ports are disconnected, the oil inlet is connected to one of the working oil ports, and the oil return port is connected to the other external working oil port; when the three-position six-way valve is in the right position, the two bridge oil ports are disconnected, the oil inlet is connected to the other working oil port, and the oil return port is connected to one of the external working oil ports.

[0038] The second reversing valve 132 is a four-position reversing valve, preferably a four-position six-way reversing valve, whose two working oil ports are connected to the lifting cylinder 161. The four-position six-way reversing valve is also connected to the joystick, which controls the reversing of the second reversing valve 132 and the output direction of the hydraulic oil. Figure 4 The four-position six-way reversing valve includes an oil inlet, an oil return port, two bridge oil ports and two working oil ports. Compared with the three-position six-way reversing valve, the four-position six-way reversing valve has an additional floating function. When the joystick is in the floating position, the two working oil ports are connected in series and differentially connected to increase the extension speed of the hydraulic cylinder. In addition, the lifting cylinder 161 is connected to the working oil port of the four-position reversing valve through a one-way throttle valve 162. The lifting cylinder 161 acts on the lifter to drive the machine to rise and fall. The one-way throttle valve 162 reduces the descending speed of the lifting cylinder 161 to ensure the stability of the descent of the lifter and the machine.

[0039] In addition, one of the working oil ports of the first reversing valve 131 and / or the second reversing valve 132 is also connected to the oil return oil circuit through a branch oil circuit 135, and an on-off valve is provided on the branch oil circuit 135. When the hydraulic output interface 16 is connected to a single-acting cylinder, the branch oil circuit 135 is in a connected state, and the hydraulic oil directly returns to the oil tank 11; when the hydraulic output interface 16 is connected to a double-acting cylinder, the branch oil circuit 135 is in a disconnected state, and the hydraulic oil enters the oil chamber of the double-acting cylinder through another oil circuit.

[0040] In a further embodiment, the oil inlet end of the first gear pump 12 is provided with an oil suction filter 14, and the oil outlet end of the first gear pump 12 is also provided with a high-pressure oil filter 15. The hydraulic oil in the oil tank 11 is filtered by the oil suction filter 14 and the high-pressure oil filter 15 to protect the hydraulic valve of the lifting oil circuit and prevent impurities from entering the hydraulic valve assembly of the lifting oil circuit.

[0041] The inlet and outlet ends of the lubricating oil circuit 2 are connected to the chassis transmission housing 21. The second gear pump 22, the radiator 23 and the chassis lubrication internal oil channel 24 are connected in series in sequence on the lubricating oil circuit 2. A second safety valve 25 is also connected in parallel between the radiator 23 and the second gear pump 22. The hydraulic fluid in the transmission chassis housing will be filtered by the oil suction filter 14 and enter the second gear pump 22 to supply oil to the chassis lubrication system. After the oil is cooled by the radiator 23, it enters the chassis lubrication internal oil channel 24 to lubricate the chassis transmission parts. In order to improve the integration of the entire hydraulic system, the first gear pump 12 and the second gear pump 22 are double gear pumps, and the front pump and the rear pump of the double gear pump supply oil to the hydraulic output oil circuit and the lubricating oil circuit 2 respectively.

[0042] In order to facilitate understanding of the technical solution of the hydraulic assembly with multiple hydraulic outputs, a brief description of its working principle is now given: under normal working conditions of the tractor, the first group of hydraulic output interfaces 16, the second group of hydraulic output interfaces 16, and the third group of hydraulic output interfaces 16 can be operated by operating the joystick connected to the first reversing valve 131, so that the wearing equipment can complete the corresponding action. The fourth hydraulic output interface 16 and the fifth hydraulic output interface 16 are connected in parallel through the solenoid valve 134, which is controlled by the fourth group of joysticks, and the solenoid valve 134 is connected to the switch button and controlled by the switch button. The use of the fourth group of hydraulic output interfaces 16 and the fifth group of hydraulic output interfaces 16 can be freely switched through the switch button to achieve the purpose of expanding the hydraulic output operation, thereby meeting the requirements of wearing equipment.

[0043] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A hydraulic assembly with multiple hydraulic outputs, characterized in that: It includes an oil tank, a first gear pump connected to the oil tank in sequence, and a hydraulic drive system, wherein the hydraulic drive system includes: The first reversing valve can control the direction of the hydraulic oil so that the actuator can complete the corresponding action; A solenoid valve, wherein the oil inlet and the oil return port of the solenoid valve are respectively connected to the two working oil ports of the first reversing valve, and the solenoid valve has two groups of working oil ports, and the two groups of working oil ports are respectively connected to two groups of hydraulic output interfaces; the solenoid valve is used to realize switching between the oil inlet, the oil return port and the two groups of working oil ports.

2. The hydraulic assembly with multiple hydraulic outputs according to claim 1, characterized in that: The solenoid valve has at least two working positions; In the first working position, the oil inlet and the oil return port of the solenoid valve are respectively connected to one group of working oil ports; In the second working position, the oil inlet and the oil return port of the solenoid valve are respectively connected to another group of working oil ports.

3. The hydraulic assembly with multiple hydraulic outputs according to claim 1, characterized in that: The solenoid valve is connected to a switch button and is controlled by the switch button.

4. The hydraulic assembly with multiple hydraulic outputs according to claim 1, characterized in that: The hydraulic drive system comprises: a plurality of first reversing valves and second reversing valves which are sequentially connected in parallel via a series oil circuit.

5. The hydraulic assembly with multiple hydraulic outputs as claimed in claim 4, characterized in that: The first reversing valve and the second reversing valve are respectively connected to different joysticks and are controlled by the joysticks.

6. The hydraulic assembly with multiple hydraulic outputs according to claim 4, characterized in that: The first reversing valve is a three-position valve, and its two working oil ports are connected to the solenoid valve or the hydraulic output interface; The second reversing valve is a four-position valve, and its two working oil ports are connected to the lifting cylinder.

7. The hydraulic assembly with multiple hydraulic outputs according to claim 6, characterized in that: One of the working oil ports of the first reversing valve and / or the second reversing valve is also connected to the oil return oil circuit through a branch oil circuit, and an on-off valve is arranged on the branch oil circuit.

8. The hydraulic assembly with multiple hydraulic outputs according to claim 6, characterized in that: A one-way throttle valve is also arranged in series on the connecting oil circuit between the lifting oil cylinder and the working oil port of the second reversing valve.

9. The hydraulic assembly with multiple hydraulic outputs according to claim 1, characterized in that: The oil inlet end of the first gear pump is provided with an oil suction filter, and the oil outlet end of the first gear pump is also provided with a high-pressure oil filter.

10. The hydraulic assembly with multiple hydraulic outputs according to claim 1, characterized in that: Also includes: The lubricating oil circuit has its inlet and outlet connected to the chassis transmission housing. The second gear pump, the radiator and the chassis lubrication internal oil channel are sequentially connected in series on the lubricating oil circuit. A second safety valve is also connected in parallel between the radiator and the second gear pump.

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