Front valve block for gearbox

Abstract

The front valve block for the gearbox comprises a valve body, and a filtering oil way and a temperature control oil way are integrated on the valve body. The temperature control oil way comprises a temperature control bypass valve and a first temperature sensor, an oil inlet of the temperature control bypass valve is connected with a cooler connector and a lubricating oil pump connector on the valve body, an oil outlet of the temperature control bypass valve is connected with a lubricating oil way connector, and the oil inlet of the temperature control bypass valve is connected with the first temperature sensor. An oil inlet of the cooler is connected to a connector of the cooler connector, and an oil outlet of the cooler is connected with an oil outlet of the temperature control bypass valve; the filtering oil way comprises a fine filter, an oil inlet of the fine filter is connected with the system oil pump connector, and an oil outlet of the fine filter is connected with the system oil way connector. According to the valve block, the fine filter, the bypass valve and the first temperature sensor are integrated on one valve body, the situation that the fine filter, the bypass valve and the first temperature sensor are independently installed on a gearbox shell is avoided, distribution of oil conveying pipelines and forming of installation holes are reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve bodies, in particular to a front valve block for a gearbox. Background Art

[0002] There are two hydraulic circuits inside the continuously variable transmission of a high-horsepower tractor: one is the system pressure hydraulic circuit, which is mainly used to drive the hydraulic actuator of the transmission. After the hydraulic oil in the hydraulic circuit circulates through the transmission, the oil is often mixed with some tiny particles. These tiny particles will move with the hydraulic oil and cause damage to the components in the system pressure hydraulic circuit. In order to ensure the safety of the components in the system pressure hydraulic circuit, a filter will be set before the system pressure hydraulic circuit for filtering. The filter will be connected between the oil tank and the system pressure hydraulic circuit through a pipeline;

[0003] The other is a lubrication hydraulic circuit, which is mainly used to lubricate the transmission parts in the gearbox. After the hydraulic oil in the hydraulic circuit circulates through the gearbox, it will bring out the heat generated during the operation of the gearbox, and then the temperature of the hydraulic oil will increase. In order to ensure that the high-temperature oil will not damage the components in the lubrication hydraulic circuit and that the oil can have a good cooling and lubricating effect, a cooler is installed between the hydraulic circuit and the oil tank.

[0004] Furthermore, the filter and the cooler are installed on the gearbox housing, which requires opening a plurality of holes on the gearbox housing. During the hole opening process, reasonable planning and processing are required according to the structure of the gearbox housing, which takes a long time. At the same time, after the filter and the cooler are installed on the housing, they need to be connected to other components through pipes, which makes the pipelines on the gearbox housing more complicated and cumbersome, and is not convenient for subsequent inspection and maintenance. Utility Model Content

[0005] In order to solve the problem that the filter component of the pressure hydraulic circuit and the temperature measuring component of the lubrication hydraulic circuit of the existing gearbox system are independently arranged on the gearbox housing, which makes the pipeline arrangement of the gearbox housing more complicated and inconvenient for subsequent maintenance, the utility model provides a front valve block for the gearbox.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A front valve block for a gearbox comprises a valve body, wherein a filter oil circuit and a temperature control oil circuit are integrated on the valve body;

[0008] The temperature control oil circuit includes a temperature control bypass valve and a first temperature sensor, the first temperature sensor and the temperature control bypass valve are installed in the valve body, the valve body is provided with a lubricating oil pump interface, a cooler interface and a lubricating oil circuit interface, the oil inlet of the temperature control bypass valve is connected to the cooler interface and the lubricating oil pump interface respectively, the oil outlet of the temperature control bypass valve is connected to the lubricating oil circuit interface, the first temperature sensor is connected to the oil circuit between the oil inlet of the temperature control bypass valve and the lubricating oil pump interface, the first temperature sensor is connected to the temperature control bypass valve signal, and is used to detect the temperature of the oil circuit between the oil inlet of the temperature control bypass valve and the lubricating oil pump interface, and control the opening and closing of the temperature control bypass valve;

[0009] The interface of the cooler interface is connected to the oil inlet of the cooler, and the oil outlet of the cooler is connected to the oil outlet of the temperature control bypass valve;

[0010] The filter oil circuit includes a fine filter, which is installed on the side end surface of the valve body. The oil inlet of the fine filter is connected to the system oil pump interface, and the oil outlet of the fine filter is connected to the system oil circuit interface.

[0011] Preferably, the temperature control oil circuit also includes a second temperature sensor, which is connected between the temperature control bypass valve and the lubricating oil circuit interface. The second temperature sensor and the temperature control bypass valve are also signal-connected, and the second temperature sensor is used to detect the temperature of the oil between the temperature control bypass valve and the lubricating oil circuit interface.

[0012] Preferably, the temperature measurement range of the second temperature sensor is -30~120°C.

[0013] Preferably, the filter oil circuit further comprises a safety overflow valve, the oil inlet of the safety overflow valve is connected to the oil inlet of the fine filter, and the oil outlet of the safety overflow valve is connected to the oil outlet of the fine filter.

[0014] Preferably, the filter oil circuit also includes a pressure sensor, which is connected to the oil circuit between the system oil pump interface and the oil inlet of the fine filter, and the pressure sensor is used to detect the pressure in the oil circuit between the system oil pump interface and the oil inlet of the fine filter.

[0015] Preferably, the pressure detection range of the pressure sensor is 25~28bar.

[0016] Preferably, the filter oil circuit further includes a differential pressure alarm sensor, the oil inlet of the differential pressure alarm sensor is connected to the oil inlet of the fine filter, and the oil outlet of the differential pressure alarm sensor is connected to the oil outlet of the fine filter.

[0017] Preferably, the filtration accuracy of the fine filter is 9.5~10.5 um.

[0018] Preferably, the temperature measurement range of the first temperature sensor is 60-120°C.

[0019] Preferably, a heat insulating portion is provided in the valve body, and the heat insulating portion comprises a heat insulating plate, and the heat insulating plate is installed in the valve body and located between the fine filter and the temperature control bypass valve, and heat insulating cotton is provided on the heat insulating plate.

[0020] Compared with the prior art, the utility model has the following beneficial technical effects:

[0021] The utility model discloses a pre-valve block for a gearbox, on which a filter oil circuit and a temperature control oil circuit are integrated. The filter oil circuit filters the oil input into the system pressure hydraulic circuit by a system oil pump through a fine filter to ensure the cleanliness of the oil and avoid small particles mixed in the oil to damage the components in the system pressure hydraulic circuit; the temperature control oil circuit controls the temperature of the oil input into the lubrication circuit through a bypass valve and a first temperature sensor to avoid excessively high temperature of the oil input into the lubrication circuit and damage to the components in the lubrication circuit; and in the pre-valve block, the fine filter of the system pressure hydraulic circuit and the bypass valve in the lubrication circuit are connected to the first temperature sensor. The temperature sensor is integrated on a valve body, which reduces the number of components installed on the transmission housing, and also eliminates the need to use pipes to connect the fine filter, bypass valve and the first temperature sensor independently on the transmission housing, reduces the distribution of oil pipelines on the transmission housing and the opening of mounting holes on the transmission, and improves the installation speed of the filter components in the system pressure hydraulic circuit and the temperature measuring components of the lubrication hydraulic circuit on the transmission housing, and improves the assembly of the system pressure hydraulic circuit and the lubrication hydraulic circuit on the transmission; at the same time, during the maintenance process, the staff can quickly find the position of the filter circuit in the system pressure hydraulic circuit, which is convenient for maintenance.

[0022] Furthermore, the temperature control oil circuit also includes a second temperature sensor. The detection temperature range of the second temperature sensor is -30~120℃. The second temperature sensor is connected between the oil outlet of the bypass valve and the lubricating oil circuit interface. The second temperature sensor can detect the temperature of the oil between the oil outlet of the bypass valve, the cooling oil circuit interface and the lubricating oil circuit interface, and perform temperature detection on the oil input into the lubrication circuit again, so as to intuitively obtain the oil temperature in the lubrication circuit.

[0023] Furthermore, the filter oil circuit also includes a safety overflow valve. When the filter element in the fine filter 4 is clogged, the safety overflow valve can allow the oil in the system oil pump input valve body to flow into the system pressure hydraulic circuit, thereby avoiding the oil in the filter oil circuit from generating extremely high pressure due to the blockage of the fine filter, thereby ensuring that the oil pump will not be burned out due to the increase in pressure caused by the blockage of the filter element.

[0024] Furthermore, the filter oil circuit also includes a pressure sensor, which can detect the pressure in the oil circuit between the system oil pump interface and the oil inlet of the fine filter, and feed back the pressure before the fine filter to the hydraulic control system in real time, so as to avoid excessive pressure before the fine filter, which may cause damage to the system oil pump and insufficient oil flow in the system pressure circuit.

[0025] Furthermore, the filter oil circuit also includes a pressure differential alarm sensor, which detects the pressure difference between the oil inlet and the oil outlet of the fine filter. When the pressure difference exceeds the set pressure differential range, the pressure differential alarm sensor issues a warning to alert the worker that the filter element of the fine filter is clogged and needs to be replaced, further ensuring the stability of the filter oil circuit in oil filtration.

[0026] Furthermore, a heat insulation part is provided in the installation cavity of the valve body, and the heat insulation part includes a heat insulation board, on which heat insulation cotton is provided. The temperature in the temperature control oil circuit is isolated by the heat insulation cotton and the heat insulation board, so as to prevent the oil temperature in the filter oil circuit from affecting the oil temperature in the temperature control oil circuit, thereby causing inaccurate temperature detection in the temperature control oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic front view of a front valve block for a gearbox provided by the utility model;

[0028] Figure 2 A schematic top view of a front valve block for a gearbox provided by the utility model;

[0029] Figure 3 A rear view schematic diagram of a front valve block for a gearbox provided by the utility model;

[0030] Figure 4 A cross-sectional schematic diagram of a front valve block for a gearbox provided by the utility model;

[0031] Figure 5 A hydraulic principle diagram of a front valve block for a gearbox provided by the utility model;

[0032] In the attached figure: 1. Lubricating oil pump interface; 2. System oil pump interface; 3. Pressure sensor; 4. Fine filter; 5. Pressure difference alarm sensor; 6. System oil circuit interface; 7. Safety overflow valve; 8. Lubricating oil circuit interface; 9. Second temperature sensor; 10. Temperature control bypass valve; 11. Cooler interface; 12. First temperature sensor; 13. Valve body; 14. Insulation part; 140. Insulation board; 141. Insulation cotton; 15. Cooling oil circuit outlet; 16. Cooler. DETAILED DESCRIPTION

[0033] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0034] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1-Figure 5 The utility model discloses a pre-valve block for a gearbox, the pre-valve block comprises a valve body 13, an installation cavity is arranged in the valve body 13, a lubricating oil pump interface 1, a system oil pump interface 2, a system oil circuit interface 6 and a lubricating oil circuit interface 8 are arranged on the rear end section of the valve body 13, a cooler interface 11 is arranged on the upper end surface of the valve body 13, and the lubricating oil pump interface 1, the system oil pump interface 2, the system oil circuit interface 6, the lubricating oil circuit interface 8 and the cooler interface 11 are evenly connected inside the installation cavity, a filter oil circuit and a temperature control oil circuit are arranged in the installation cavity, and the lubricating oil pump interface 1 is located at the valve body 1 The port at the outer end of the valve body 13 is connected to the oil outlet of the lubricating oil pump through a pipeline, the lubricating oil circuit interface 8 is located at the port at the outer end of the valve body 13 and is connected to the oil inlet of the lubricating hydraulic circuit through a pipeline, the cooler interface 11 is located at the port at the outer end of the valve body 13 and is connected to the cooler, and the temperature control oil circuit is connected to the lubricating oil pump interface 1, the lubricating oil circuit interface 8 and the cooler interface 11 in the installation cavity, and the temperature of the oil used for lubrication is detected to prevent the oil temperature entering the lubrication circuit from being too high, causing damage to the components in the lubrication circuit and the oil from not having a good cooling effect; the system oil pump interface 2 is The port on the outside of the valve body 13 is connected to the system oil pump through a pipeline, the system oil circuit interface 6 is located on the port on the outside of the valve body 13 and is connected to the oil inlet of the system pressure hydraulic circuit through a pipeline, and the filter oil circuit is connected between the system oil pump interface 2 and the system oil circuit interface 6, thereby filtering the oil entering the system pressure hydraulic circuit, improving the cleanliness of the oil entering the system pressure hydraulic circuit, and protecting the components in the system pressure hydraulic circuit; in this pre-valve block, the fine filter 4 of the system pressure hydraulic circuit and the temperature control bypass valve 10 in the lubrication circuit are integrated with the first temperature sensor 12 On a valve body 13, the fine filter 4, the temperature control bypass valve 10 and the first temperature sensor 12 are independently connected on the gearbox housing and need not be connected by pipes, thereby reducing the distribution of oil pipelines on the gearbox housing and the opening of mounting holes on the gearbox, improving the installation speed of the filter components in the system pressure hydraulic circuit and the temperature measuring components of the lubrication hydraulic circuit on the gearbox housing, and improving the assembly of the system pressure hydraulic circuit and the lubrication hydraulic circuit on the gearbox; at the same time, during the maintenance process, the staff can quickly find the position of the filter circuit in the system pressure hydraulic circuit, which is convenient for maintenance.

[0040] See also Figure 1-Figure 5The temperature control oil circuit includes a temperature control bypass valve 10 and a first temperature sensor 12. The first temperature sensor 12 and the temperature control bypass valve 10 are both installed in the installation cavity, and the oil inlet of the temperature control bypass valve 10 is respectively connected to the cooler interface 11 and the lubricating oil pump interface 1, and the oil outlet of the temperature control bypass valve 10 is connected to the lubricating oil circuit interface 8. The oil input into it by the lubricating oil pump from the valve body 13 passes through the temperature control bypass valve 10 and flows out from the lubricating oil circuit interface 8 on the valve body 13. The first temperature sensor 12 is connected to the oil circuit between the oil inlet of the temperature control bypass valve 10 and the lubricating oil pump interface 1. The first temperature sensor 12 is connected to the temperature control bypass valve 10 signal. The first temperature sensor 12 is used to detect the temperature of the oil circuit between the oil inlet of the temperature control bypass valve 10 and the lubricating oil pump interface 1, and control the opening and closing of the temperature control bypass valve 10, that is, when the first temperature sensor 12 detects that the temperature of the oil circuit between the oil inlet of the temperature control bypass valve 10 and the lubricating oil pump interface 1 exceeds the temperature set thereon, the temperature of the oil circuit is controlled. After the temperature range, a closing signal is sent to the temperature control bypass valve 10. After the temperature control bypass valve 10 receives the signal, it closes. The oil in the valve body 13 is input by the lubricating oil pump and output from the valve body 13 to the cooler interface 11, and enters the cooler for cooling. The interface of the cooler interface 11 is connected to the oil inlet of the cooler 16 through an oil pipe, and the oil outlet of the cooler 16 is connected to the cooling oil circuit outlet 15 through an oil pipe. The cooling oil circuit outlet 15 is connected to the oil outlet of the temperature control bypass valve 10 and the lubricating oil circuit interface 8; in the above system, when the oil enters the valve body 13 from the lubricating oil pump interface 1, it is detected by the first temperature sensor 12. After detecting that the temperature of the oil exceeds the set temperature value, the first temperature sensor 12 sends a signal to the temperature control bypass valve 10, and the temperature control bypass valve 10 is closed. Then, the oil enters the cooler 16 from the cooler interface 11 for cooling, and is then transported to the lubrication circuit through the cooling oil circuit outlet 15 for use. The temperature measurement range of the first temperature sensor 12 is 60-120° C. In this embodiment, the lowest temperature detected by the first temperature sensor 12 is set to 60° C.

[0041] See also Figure 1-Figure 5 , the oil filtering circuit includes a fine filter 4, which is installed on the right end face of the valve body 13, and the valve body 13 is provided with oil holes at positions corresponding to the oil inlet and oil outlet of the fine filter 4, and the oil holes are connected to the installation cavity, wherein the oil hole connected to the oil inlet of the fine filter 4 in the installation cavity is connected to the system oil pump interface 2, and the oil hole connected to the oil outlet of the fine filter 4 in the installation cavity is connected to the system oil circuit interface 6, so that the system oil pump inputs the oil into the valve body 13 for filtration, and the filtered oil is input into the system pressure hydraulic circuit to ensure the cleanliness of the oil input into the system pressure hydraulic circuit. Among them, the filtration accuracy of the fine filter 4 is 9.5~10.5 um. In order to ensure the cleanliness of the oil filtered by the fine filter 4, the fine filter 4 in this example is DG145-79, and its filtration accuracy is 10um.

[0042] See also Figure 1-Figure 5 The temperature control oil circuit also includes a second temperature sensor 9, which is installed in the installation cavity and located in the oil circuit between the oil outlet of the temperature control bypass valve 10, the cooling oil circuit interface 15 and the lubricating oil circuit interface 8. The second temperature sensor 9 is also used to detect the temperature of the oil between the oil outlet of the temperature control bypass valve 10, the cooling oil circuit interface 15 and the lubricating oil circuit interface 8, so as to intuitively obtain the oil temperature in the lubrication circuit. That is, the second temperature sensor 9 is used to detect the temperature of the oil flowing out of the oil outlet of the temperature control bypass valve 10, and the temperature of the oil after cooling by the cooler 16. The detection temperature range of the second temperature sensor in this example is -30~120℃.

[0043] See also Figure 1-Figure 5 The filter oil circuit also includes a safety relief valve 7, which is installed in the installation cavity of the valve body 13. The oil inlet of the safety relief valve 7 is connected to the oil inlet of the fine filter 4, and the oil outlet of the safety relief valve 7 is connected to the oil outlet of the fine filter 4. When the filter element in the fine filter 4 is blocked, the safety relief valve 7 opens, and the oil in the valve body 13 is input through the system oil pump to flow from the safety relief valve 7 into the system pressure hydraulic circuit, thereby avoiding the oil in the filter oil circuit from generating a huge pressure due to the blockage of the fine filter 4, thereby ensuring that the oil pump will not be burned out due to the increase of pressure caused by the blockage of the filter element.

[0044] See also Figure 1-Figure 5 The filter oil circuit also includes a pressure sensor 3, which is installed on the upper end surface of the valve body 13 at a position on the right side of the cooler interface 11. An oil hole is provided on the valve body 13 corresponding to the detection end of the pressure sensor 3, and the oil hole is connected to the oil circuit between the system oil pump interface 2 and the oil inlet of the fine filter 4. The pressure sensor 3 is used to detect the pressure in the oil circuit between the system oil pump interface 2 and the oil inlet of the fine filter 4. Among them, the pressure detection range of the pressure sensor 3 is 25~28bar, and preferably, the detection value of the pressure sensor 3 is 26. The pressure sensor 3 is used to detect the oil pressure between the system oil pump interface 2 and the oil inlet of the fine filter 4 in the filter oil circuit, and to feed back the pressure before the fine filter 4 to the hydraulic control system in real time to avoid excessive pressure before the fine filter 4, which causes damage to the system oil pump and insufficient oil flow in the system pressure circuit.

[0045] See also Figure 1-Figure 5The filter oil circuit also includes a differential pressure alarm sensor 5, which is installed on the right end face of the valve body 13, and oil through holes are respectively provided at the positions corresponding to the oil inlet and oil outlet of the differential pressure alarm sensor 5 in the valve body 13. The oil through hole connected to the oil inlet of the differential pressure alarm sensor 5 is communicated with the oil inlet of the fine filter 4, and the oil through hole connected to the oil outlet of the differential pressure alarm sensor 5 is communicated with the oil outlet of the fine filter 4. The pressure difference between the oil inlet and the oil outlet of the fine filter 4 is detected by the differential pressure alarm sensor 5. When the pressure difference exceeds the set pressure difference range, the differential pressure alarm sensor 5 issues a warning, alerting the worker that the filter element of the fine filter 4 is blocked and needs to be replaced, thereby further ensuring the stability of the filter oil circuit in filtering oil.

[0046] See also Figure 4 A heat insulating portion 14 is provided in the installation cavity of the valve body 13, and the heat insulating portion 14 includes a heat insulating plate 140. The heat insulating plate 140 is installed in the valve body 13 and is located between the fine filter 4 and the temperature control bypass valve 10, thereby separating the filter oil circuit and the temperature control oil circuit, and heat insulating cotton 141 is provided on the end surface of the heat insulating plate 140 relative to the fine filter 4 and the end surface relative to the temperature control bypass valve 10. The temperature in the temperature control oil circuit is isolated by the heat insulating cotton 141, and the temperature in the temperature control oil circuit is isolated by the heat insulating cotton 141 and the heat insulating plate 140, so as to avoid the oil temperature in the filter oil circuit from affecting the oil temperature in the temperature control oil circuit, resulting in inaccurate temperature detection in the temperature control oil circuit.

[0047] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A front valve block for a gearbox, characterized in that: It comprises a valve body (13), wherein a filter oil circuit and a temperature control oil circuit are integrated on the valve body (13); The temperature control oil circuit comprises a temperature control bypass valve (10) and a first temperature sensor (12); the first temperature sensor (12) and the temperature control bypass valve (10) are installed in the valve body (13); a lubricating oil pump interface (1), a cooler interface (11) and a lubricating oil circuit interface (8) are provided on the valve body (13); an oil inlet of the temperature control bypass valve (10) is connected to the cooler interface (11) and the lubricating oil pump interface (1) respectively; an oil outlet of the temperature control bypass valve (10) is connected to the lubricating oil circuit interface (8); the first temperature sensor (12) is connected to the oil circuit between the oil inlet of the temperature control bypass valve (10) and the lubricating oil pump interface (1); the first temperature sensor (12) is signal-connected to the temperature control bypass valve (10) for detecting the temperature of the oil circuit between the oil inlet of the temperature control bypass valve (10) and the lubricating oil pump interface (1) and controlling the opening and closing of the temperature control bypass valve (10); The interface of the cooler interface (11) is connected to the oil inlet of the cooler (16), and the oil outlet of the cooler (16) is connected to the oil outlet of the temperature control bypass valve (10); The filtering oil circuit comprises a fine filter (4), the fine filter (4) being mounted on a side end surface of the valve body (13), the oil inlet of the fine filter (4) being connected to a system oil pump interface (2), and the oil outlet of the fine filter (4) being connected to a system oil circuit interface (6).

2. A front valve block for a gearbox according to claim 1, characterized in that: The temperature control oil circuit further comprises a second temperature sensor (9), the second temperature sensor (9) being connected between the temperature control bypass valve (10) and the lubricating oil circuit interface (8), the second temperature sensor (9) and the temperature control bypass valve (10) also being signal-connected, the second temperature sensor (9) being used to detect the temperature of the oil between the temperature control bypass valve (10) and the lubricating oil circuit interface (8).

3. A front valve block for a gearbox according to claim 2, characterized in that: The temperature measurement range of the second temperature sensor (9) is -30~120°C.

4. A front valve block for a gearbox according to claim 1, characterized in that: The filter oil circuit further comprises a safety overflow valve (7), the oil inlet of the safety overflow valve (7) being connected to the oil inlet of the fine filter (4), and the oil outlet of the safety overflow valve (7) being connected to the oil outlet of the fine filter (4).

5. A front valve block for a gearbox according to claim 4, characterized in that: The filtering oil circuit also includes a pressure sensor (3), the pressure sensor (3) being connected to the oil circuit between the system oil pump interface (2) and the oil inlet of the fine filter (4), the pressure sensor (3) being used to detect the pressure in the oil circuit between the system oil pump interface (2) and the oil inlet of the fine filter (4).

6. A front valve block for a gearbox according to claim 5, characterized in that: The pressure detection range of the pressure sensor (3) is 25-28 bar.

7. A front valve block for a gearbox according to claim 5, characterized in that: The filter oil circuit further comprises a differential pressure alarm sensor (5), the oil inlet of the differential pressure alarm sensor (5) being connected to the oil inlet of the fine filter (4), and the oil outlet of the differential pressure alarm sensor (5) being connected to the oil outlet of the fine filter (4).

8. The pre-valve block for a gearbox according to claim 1, characterized in that: The filtration accuracy of the fine filter (4) is 9.5-10.5 um.

9. The front valve block for a gearbox according to claim 1, characterized in that: The temperature measurement range of the first temperature sensor (12) is 60-120°C.

10. The front valve block for a gearbox according to claim 1, characterized in that: A heat insulating portion (14) is provided in the valve body (13), the heat insulating portion (14) comprising a heat insulating plate (140), the heat insulating plate (140) being installed in the valve body (13) and located between the fine filter (4) and the temperature control bypass valve (10), and heat insulating cotton (141) being provided on the heat insulating plate (140).

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