Power gear shifting control valve integrated with temperature control valve and tractor with power gear shifting control valve

Abstract

The utility model relates to a power gear shifting control valve integrated with a temperature control valve and a tractor with the power gear shifting control valve. The power gear shifting control valve integrated with the temperature control valve comprises a valve body, a proportional electromagnetic valve, an overflow valve and the temperature control valve are arranged in the valve body, the valve body is provided with an oil inlet, the oil inlet is connected with an inlet of the proportional electromagnetic valve and an inlet of the overflow valve through a first flow channel, the valve body is provided with a working oil port, and the working oil port is connected with an outlet of the proportional electromagnetic valve through a second flow channel. The valve body is provided with a radiator oil port and a first oil port, an outlet of the overflow valve is connected with an inlet of the temperature control valve through a third flow channel, an outlet of the temperature control valve is connected with the first oil port through a fourth flow channel, and the outlet of the overflow valve is further connected with the radiator oil port through a fifth flow channel. The device has the advantages that the structural design is simple and reasonable, oil can flow through a bypass under the low-temperature condition, the effect of short circuit of the radiator under the low-temperature condition is achieved, and the problem that a power gear shifting machine is slow in vehicle heating in the low-temperature environment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery and equipment, in particular to a power shift control valve integrated with a temperature control valve and a tractor having the same. Background Art

[0002] Most existing power-shift tractors have low-temperature protection strategies. Therefore, during operation, the cooling oil of the power-shift tractors generally flows through the radiator, especially when the vehicle is started. This can lead to low warm-up efficiency in low-temperature environments.

[0003] Based on this, it is necessary to develop a power shift control valve with an integrated temperature control valve to overcome the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a power shift control valve with an integrated temperature control valve and a tractor having the same, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A power shift control valve with an integrated temperature control valve includes a valve body, wherein a proportional solenoid valve, a relief valve and a temperature control valve are arranged in the valve body, the valve body is provided with an oil inlet, the oil inlet is connected to the inlet of the proportional solenoid valve and the inlet of the relief valve through a first flow channel, the valve body is provided with a working oil port, the working oil port is connected to the outlet of the proportional solenoid valve through a second flow channel, the valve body is provided with a radiator oil port and a first oil port, the outlet of the relief valve is connected to the inlet of the temperature control valve through a third flow channel, the outlet of the temperature control valve is connected to the first oil port through a fourth flow channel, and the outlet of the relief valve is also connected to the radiator oil port through a fifth flow channel.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, there are multiple proportional solenoid valves, and the first flow channels are connected to the inlet of each proportional solenoid valve through multiple sixth flow channels one by one. There are multiple corresponding working oil ports, which are connected to the outlet of each proportional solenoid valve one by one.

[0009] Furthermore, there are three proportional solenoid valves.

[0010] Furthermore, the valve body is provided with a plurality of first pressure measuring points, each of which is connected to the second flow channel, and a first pressure sensor is provided at the first pressure measuring point.

[0011] Furthermore, the valve body is provided with a second pressure measuring point, the second pressure measuring point is connected to the first flow channel, and a second pressure sensor is provided at the second pressure measuring point.

[0012] Furthermore, the first flow channel is connected to an accumulator.

[0013] Furthermore, the oil inlet of the valve body is connected to the pump body and the oil tank in sequence through pipelines.

[0014] Furthermore, the oil return port of the proportional solenoid valve is connected to the oil tank through a pipeline.

[0015] Furthermore, the radiator oil port is connected to the oil inlet of the radiator through a pipeline, the first oil port is connected to the oil outlet of the radiator through a pipeline, and the oil outlet of the radiator is connected to a lubrication system.

[0016] The beneficial effects of the utility model are: simple and reasonable structural design, capable of allowing oil to flow through the bypass under low temperature conditions, playing the role of a short-circuit radiator under low temperature conditions, and improving the problem of slow warm-up of power shift models in low temperature environments.

[0017] A tractor is also provided, comprising a power shift control valve integrated with a temperature control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a power shift control valve with an integrated temperature control valve according to the present invention;

[0019] Figure 2 This is a structural schematic diagram of another form of the power shift control valve with integrated temperature control valve of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] 1. Valve body; 2. Accumulator; 3. Pump body; 4. Oil tank; 5. Radiator; 11. Proportional solenoid valve; 12. Overflow valve; 13. Temperature control valve. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] Example 1

[0024] like Figure 1As shown, the power shift control valve with an integrated temperature control valve in this embodiment includes a valve body 1, in which a proportional solenoid valve 11, a relief valve 12 and a temperature control valve 13 are arranged. The valve body 1 is provided with an oil inlet, which is connected to the inlet of the proportional solenoid valve 11 and the inlet of the relief valve 12 through a first flow channel. The valve body 1 is provided with a working oil port a, which is connected to the outlet of the proportional solenoid valve 11 through a second flow channel. The valve body 1 is provided with a radiator oil port b and a first oil port c. The outlet of the relief valve 12 is connected to the inlet of the temperature control valve 13 through a third flow channel, the outlet of the temperature control valve 13 is connected to the first oil port through a fourth flow channel, and the outlet of the relief valve 12 is also connected to the radiator oil port through a fifth flow channel.

[0025] The principle of the power shift control valve with integrated temperature control valve of this embodiment is as follows:

[0026] After entering the oil inlet, the oil is split into two paths: one through the first flow channel (proportional solenoid valve 11) and the second flow channel (working oil port), where it is supplied to the required hydraulic working unit. The other path, the first flow channel, is through the relief valve 12. In low-temperature environments (below the set temperature of thermostatic valve 13), thermostatic valve 13 serves as a pathway, with most of the oil in relief valve 12 flowing through thermostatic valve 13, the fourth flow channel, and the first oil port, where it is then supplied to the lubrication oil circuit. When the temperature rises above the set temperature of thermostatic valve 13, the valve core inside thermostatic valve 13 moves, disconnecting the oil circuit. The oil in relief valve 12 then flows through the fifth flow channel (radiator oil port) and into radiator 5, which is connected to the radiator oil port. The entire valve body has a simple and compact structural design. It "short-circuits" the radiator path or switches to flow through the radiator path based on the set temperature of thermostatic valve 13, effectively improving the slow warm-up problem of powershift models in low-temperature environments.

[0027] As a preferred embodiment, there are multiple proportional solenoid valves 11, and the first flow channels are connected to the inlet of each proportional solenoid valve 11 through multiple sixth flow channels one by one. There are multiple corresponding working oil ports, which are connected to the outlet of each proportional solenoid valve 11 one by one.

[0028] In the above embodiment, a plurality of proportional solenoid valves 11 are provided, and a plurality of corresponding working oil ports are provided, which can be matched one to one, thereby supplying oil circuits to a plurality of hydraulic working units.

[0029] Preferably, three proportional solenoid valves 11 are provided.

[0030] As a preferred embodiment, the valve body 1 is provided with a plurality of first pressure measuring points e, each of which is connected to each of the second flow channels, and a first pressure sensor is provided at the first pressure measuring point.

[0031] In the above embodiment, the working oil pressure of each second flow channel, that is, each working oil port, can be monitored one-to-one through multiple first pressure measuring points, and then the working performance of the entire valve body can be clearly understood based on the data.

[0032] As a preferred embodiment, the valve body 1 is provided with a second pressure measuring point f, the second pressure measuring point is connected to the first flow channel, and a second pressure sensor is provided at the second pressure measuring point.

[0033] In the above embodiment, the second pressure sensor at the second pressure measuring point can monitor the total oil pressure in the entire flow channel in real time. The working status of the valve body can be clearly known through the data to ensure the safety performance of the entire oil circuit.

[0034] As a preferred embodiment, the first flow channel is connected to an accumulator 2 .

[0035] In the above embodiment, the design of the accumulator 2 can ensure that the oil is delivered to the working oil port during instantaneous operation, ensuring that the flow rate can meet the use requirements during instantaneous operation.

[0036] As a preferred embodiment, the oil inlet of the valve body 1 is sequentially connected to the pump body 3 and the oil tank 4 through pipelines.

[0037] In the above embodiment, the pump body 3 pumps the oil in the oil tank 4 to the first flow channel, ensuring smooth flow and transportation of the oil in the entire valve body.

[0038] In this embodiment, the oil return port of the proportional solenoid valve 11 is connected to the oil tank 4 via a pipeline, which ensures that the oil in the pipeline can smoothly return to the oil tank 4 when the proportional solenoid valve 11 is in a closed state.

[0039] As a preferred embodiment, the above-mentioned radiator oil port is connected to the oil inlet of the radiator 5 through a pipeline, the above-mentioned first oil port is connected to the oil outlet of the radiator 5 through a pipeline, and the oil outlet of the radiator 5 is connected to the lubrication system D.

[0040] In the above embodiment, the fifth flow channel and the radiator 5 are on one path, and the temperature control valve 13, the fourth flow channel and the third flow channel are on the other path. The two paths are parallel oil paths. Therefore, under low temperature conditions, after the oil path of the temperature control valve 13 is unblocked, a large amount of oil can pass through the fourth flow channel and the third flow channel, thereby achieving the purpose of "short-circuiting" the radiator 5.

[0041] In this embodiment, the temperature control valve 13 is a product of the prior art and is a two-position, two-way valve. One end of the internal valve core is connected to a spring, and the other end is connected to a thermosensitive material. The thermosensitive material expands and contracts with temperature, causing its volume to change with temperature, pushing the valve core to move and change position. For example, if the temperature is low, the valve core of the temperature control valve 13 is in the right position, the valve core is conductive, "short-circuiting" the radiator 5, and most of the oil flows through the valve core, leaving a small amount of oil flowing through the radiator 5. When the temperature reaches above the set temperature, the thermosensitive material expands, pushing the valve core of the temperature control valve 13 to the left position, and most of the oil flow is dissipated through the radiator 5. The left position of the temperature control valve 13 has a built-in relief valve that bypasses the radiator 5, meaning that a small amount of oil flow passes through the relief valve inside the temperature control valve 13.

[0042] Example 2

[0043] The tractor of this embodiment includes the power shift control valve integrated with the temperature control valve in embodiment 1.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation to the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A power shift control valve with an integrated temperature control valve, characterized in that: The invention comprises a valve body (1), wherein a proportional solenoid valve (11), a relief valve (12) and a temperature control valve (13) are arranged in the valve body (1), the valve body (1) is provided with an oil inlet, the oil inlet is connected to the inlet of the proportional solenoid valve (11) and the inlet of the relief valve (12) through a first flow channel, the valve body (1) is provided with a working oil port, the working oil port is connected to the outlet of the proportional solenoid valve (11) through a second flow channel, the valve body (1) is provided with a radiator oil port and a first oil port, the outlet of the relief valve (12) is connected to the inlet of the temperature control valve (13) through a third flow channel, the outlet of the temperature control valve (13) is connected to the first oil port through a fourth flow channel, and the outlet of the relief valve (12) is further connected to the radiator oil port through a fifth flow channel.

2. The power shift control valve with integrated temperature control valve according to claim 1, characterized in that: There are a plurality of proportional solenoid valves (11), and the first flow channel is connected to the inlet of each proportional solenoid valve (11) through a plurality of sixth flow channels in a one-to-one correspondence. There are a plurality of corresponding working oil ports, and they are connected to the outlet of each proportional solenoid valve (11) in a one-to-one correspondence.

3. The power shift control valve with integrated temperature control valve according to claim 2, characterized in that: There are three proportional solenoid valves (11).

4. The power shift control valve with integrated temperature control valve according to claim 2, characterized in that: The valve body (1) is provided with a plurality of first pressure measuring points, each of which is connected to the second flow channel, and a first pressure sensor is provided at each of the first pressure measuring points.

5. The power shift control valve with integrated temperature control valve according to claim 1, characterized in that: The valve body (1) is provided with a second pressure measuring point, the second pressure measuring point is connected to the first flow channel, and a second pressure sensor is provided at the second pressure measuring point.

6. The power shift control valve with integrated temperature control valve according to claim 1, characterized in that: The first flow channel is connected to an accumulator (2).

7. The power shift control valve with integrated temperature control valve according to claim 1, characterized in that: The oil inlet of the valve body (1) is connected to the pump body (3) and the oil tank (4) in sequence through pipelines.

8. The power shift control valve with integrated temperature control valve according to claim 7, characterized in that: The oil return port of the proportional solenoid valve (11) is connected to the oil tank (4) via a pipeline.

9. The power shift control valve integrated with a temperature control valve according to any one of claims 1 to 8, characterized in that: The radiator oil port is connected to the oil inlet of the radiator (5) via a pipeline, the first oil port is connected to the oil outlet of the radiator (5) via a pipeline, and the oil outlet of the radiator (5) is connected to a lubrication system.

10. A tractor, characterized in that: A power shift control valve comprising an integrated temperature control valve according to any one of claims 1 to 9.

Images