Hydraulic assembly for gearbox

Abstract

The hydraulic assembly for the gearbox comprises a gearbox shell, a duplex gear pump, a first control valve set and at least one second control valve set, the gearbox shell is provided with an oil outlet, the gearbox comprises a front end cover and a rear end cover, the two sides of the front end cover are each provided with an oil return opening and a hydraulic oil inlet, and one side of the front end cover is further provided with a lubricating oil opening; the duplex gear pump is installed on the side face of the gearbox shell. The first control valve set is arranged on one side of the rear end cover and comprises a first valve body, a first oil inlet, a second oil inlet, a first connector, a second connector and a third connector, wherein the first oil inlet, the second oil inlet, the first connector, the second connector and the third connector are formed in the first valve body. The first interface, the second interface and the third interface are respectively communicated with a roller skating oil port, an oil return port and a hydraulic oil inlet, and the first oil inlet and the second oil inlet are both communicated with a duplicate gear pump pipeline; and the second control valve group is in pipeline connection with the first control valve group. The control system is simple in structure, a plurality of wet clutches and synchronizers can be controlled more simply, conveniently and efficiently, and the power gear shifting function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox transmission, in particular to a hydraulic assembly for a gearbox. Background Art

[0002] In the prior art, a full powershift transmission includes components such as gears, bearings, wet clutches, and synchronizers. The TCU (Transmission Control Unit) controls the engagement and disengagement of the clutches and synchronizers to achieve different power transmission paths, enabling power shifting and reversing, reducing operator labor intensity and improving work efficiency. In the hydraulic system design of existing powershift transmissions, shifting is generally achieved by engaging and disengaging multiple clutches. Each clutch group is equipped with a corresponding cylinder, which engages and disengages the clutches under the action of hydraulic pressure. When a large number of cylinders need to be controlled, the design of the hydraulic oil circuit directly affects the changes in the hydraulic pressure within the cylinders and the changes in the hydraulic pressure between different cylinder groups at the same time, thereby affecting the effectiveness of clutch exchange and coordination, and thus directly determining the shift quality of the transmission.

[0003] Therefore, it is necessary to provide a hydraulic assembly for a transmission to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic assembly for a gearbox.

[0005] According to one aspect of the present invention, a hydraulic assembly for a gearbox is provided, comprising:

[0006] A gearbox housing, wherein an oil outlet is provided at the bottom of the gearbox housing, and the gearbox comprises a front cover and a rear cover, both sides of the front cover are provided with an oil return port and a hydraulic oil inlet, and one side is also provided with a lubricating oil port;

[0007] a duplex gear pump, the duplex gear pump being mounted on a side surface of the transmission housing;

[0008] a first control valve group, the first control valve group being arranged on one side of the rear end cover, comprising a first valve body, a first oil inlet, a second oil inlet, a first interface, a second interface, and a third interface provided on the first valve body; the first valve body comprising a first mounting surface connected to the transmission housing, a first external connecting surface arranged opposite to the first mounting surface, and a second external connecting surface and a third external connecting surface located on both sides of the first external connecting surface; the first interface, the second interface, and the third interface are all arranged on the first mounting surface, and are respectively connected to the wheel pulley oil port, the return oil port, and the hydraulic oil inlet; the first oil inlet and the second oil inlet are both arranged on the first external connecting surface and are both connected to the duplex gear pump through a pipeline;

[0009] At least one second control valve group, the second control valve group is connected to the first control valve group pipeline, and the second control valve group is arranged on the opposite side of the front cover to the first control valve group and / or on both sides of the rear cover.

[0010] Preferably, the first control valve group also includes multiple first clutch solenoid valves and multiple first synchronizer solenoid valves, the first clutch solenoid valves are arranged on the second external connecting surface, the first synchronizer solenoid valves are arranged on the third external connecting surface, and the first control valve group also includes a fourth interface arranged on the third external connecting surface.

[0011] Preferably, it also includes an oil pressure filter connected in series between the first oil inlet and the duplex gear pump, an oil suction filter element arranged at the oil outlet, an accumulator connected to the fourth interface pipeline, and a refueling pipe arranged on the side of the body.

[0012] Preferably, a mounting seat for mounting the first control valve group is provided on one side of the front end cover, and a hydraulic oil inlet, an oil return port and a lubricating oil port are provided on the mounting seat. The mounting seat, the double gear pump, the oil outlet and the refueling pipe are all located on the same side of the gearbox housing.

[0013] Preferably, the first control valve group also includes a fifth interface and a sixth interface arranged on the first external connecting surface, the fifth interface is connected to the second oil inlet through an oil channel arranged inside the first valve body, the second control valve group is connected to the fifth interface through a pipeline, and the sixth interface is connected to the first oil inlet through an oil channel arranged inside the first valve body.

[0014] Preferably, the second valve group includes a second valve body, a third oil inlet provided on the second valve body, a seventh interface and an eighth interface, the second valve body includes a second mounting surface connected to the transmission housing and a non-mounting surface that is not in contact with the transmission housing, the third oil inlet is provided on the non-mounting surface and is connected to the fifth interface through a pipeline, the seventh interface is provided on the second mounting surface and is connected to the third oil inlet through an oil channel provided inside the second valve body, the eighth interface is provided on the second mounting surface and is connected to the oil return port on the side accordingly.

[0015] Preferably, the duplex gear pump includes a first oil pump and a second oil pump, the first oil pump is connected to the second oil inlet through a pipeline, the second oil pump is connected to the first oil inlet through a pipeline, and the oil outlet is connected to the second oil pump through a pipeline.

[0016] Preferably, the second valve group further includes two second synchronizer solenoid valves, and the second synchronizer solenoid valves are installed on the non-installation surface.

[0017] Compared with the prior art, the hydraulic assembly for the gearbox provided by the present invention has the following beneficial effects:

[0018] By adopting the above-mentioned technical solution, the present invention has the advantages of simple structure, ingenious design, and low cost, and can more easily and efficiently control multiple wet clutches and synchronizers to achieve power shifting functions. By assembling system components such as the gear pump, oil suction filter element, oil pressure filter, electro-hydraulic valve block, and piping on the transmission housing to form an independent system, this not only simplifies the piping layout of the entire hydraulic control system, but also facilitates the assembly and use of the full power shift transmission. As long as there is power input, the transmission system can operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 is a perspective view of the hydraulic assembly for the transmission of this embodiment;

[0021] Figure 2 is a perspective view of the gearbox housing of this embodiment;

[0022] Figure 3 is a partial schematic diagram of the hydraulic assembly for the transmission of this embodiment;

[0023] Figure 4 is a three-dimensional diagram of the first control valve group of this embodiment;

[0024] Figure 5 This is a rear view of the first control valve group of this embodiment;

[0025] Figure 6 is a perspective view of the second control valve group of this embodiment;

[0026] Figure 7 This is a rear view of the second control valve group of this embodiment.

[0027] Among them, 1. Transmission housing, 1a. Front cover, 1a1. Mounting seat, 1b. Rear cover, 11. Oil outlet, 12. Oil return port, 13. Hydraulic oil inlet, 14. Lubricating oil port, 2. Duplex gear pump, 21. First oil pump, 22. Second oil pump, 3. First control valve group, 31. First valve body, 311. First mounting surface, 312. First external connecting surface, 313. Second external connecting surface, 314. Third external connecting surface, 32. First oil inlet, 33. Second oil inlet, 34. First interface, 35. Second interface, 36. Third interface, 37. Fourth interface, 38. Fifth interface, 39. Sixth interface, 3a. First clutch solenoid valve, 3b. First synchronizer solenoid valve, 4. Second control valve group, 41. Second valve body, 411. Second mounting surface, 412. Non-mounting surface, 42. Third oil inlet, 43. Seventh interface, 44. Eighth interface, 4a. Second synchronizer solenoid valve, 5. Oil pressure filter, 6. Oil suction filter element, 7. Accumulator, 8. Fuel pipe. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0030] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] 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.

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0034] See also Figure 1 This embodiment discloses a hydraulic assembly for a transmission, including a transmission housing 1, a duplex gear pump 2, a first control valve group 3, a second control valve group 4, an oil pressure filter 5, an oil suction filter element 6, an accumulator 7 and a refueling pipe 8.

[0035] See also Figure 2 An oil tank is formed inside the gearbox housing 1, and the oil tank is capable of accommodating a hydraulic medium, and the hydraulic medium is preferably an oil having both hydraulic and lubricating functions. An oil outlet 11 is provided at the bottom of the gearbox housing 1, and the gearbox housing 1 includes a front end cover 1a and a rear end cover 1b. Both sides of the front end cover 1a are provided with an oil return port 12 and a hydraulic oil inlet 13, and one side is also provided with a lubricating oil port 14. Preferably, one oil return port 12 is provided on both sides of the front end cover 1a and both sides of the rear end cover 1b, and multiple hydraulic oil inlets 13 are provided. A mounting seat 1a1 is provided on one side of the front end cover 1a, and the hydraulic oil inlet 13 and the oil return port 12 located on this side are both provided on the mounting seat 1a1. At the same time, the lubricating oil port 14 is also provided on the mounting seat 1a1.

[0036] See also Figure 3 The double gear pump 2 is installed on the side of the transmission housing 1 , and the double gear pump 2 includes a first oil pump 21 and a second oil pump 22 .

[0037] See also Figure 4 and Figure 5 The first control valve assembly 3 is mounted on the mounting seat 1a1 and includes a first valve body 31, a first oil inlet 32, a second oil inlet 33, a first port 34, a second port 35, and a third port 36. The first valve body 31 includes a first mounting surface 311 connected to the transmission housing 1, a first external connecting surface 312 opposite the first mounting surface 311, and second and third external connecting surfaces 313, 314 located on either side of the first external connecting surface 312.

[0038] The first, second, and third ports 34, 35, 36 are all located on the first mounting surface 311 and connect to the lubricating oil port 14, the oil return port 12, and the hydraulic oil inlet 13, respectively. The first and second oil inlets 32, 33 are both located on the first external connection surface 312 and connect to the duplex gear pump 2 via pipelines. The first oil pump 21 is connected to the second oil inlet 33 via a pipeline, the second oil pump 22 is connected to the first oil inlet 32 ​​via a pipeline, and the oil outlet 11 is connected to the second oil pump 22 via a pipeline.

[0039] The first control valve group 3 also includes five first clutch solenoid valves 3a and six first synchronizer solenoid valves 3b. The first clutch solenoid valves 3a are located on the second external connection surface 313, and the first synchronizer solenoid valves 3b are located on the third external connection surface 314. The first clutch solenoid valves 3a and the first synchronizer solenoid valves 3b are connected in series to the parallel oil circuit where the third port 36 is located. The first control valve group 3 also includes a fourth port 37 located on the third external connection surface 314. The accumulator 7 is connected to the fourth port 37 via a pipeline.

[0040] The first port 34 is connected to the first oil inlet 32 ​​via an oil passage within the first valve body 31. When the first valve body 31 is mounted on the front end cover 1a, the first port 34 is in communication with the lubricating oil port 14. The second port 35 is connected to the oil return port of the first clutch solenoid valve 3a or the first synchronizer solenoid valve 3b via an internal oil passage. When the first valve body 31 is mounted on the front end cover 1a, the second port 35 is in communication with the oil return port 12. The third port 36 is connected to the second oil inlet 33 via an oil passage within the first valve body 31.

[0041] See also Figure 1 and Figure 3 The oil pressure filter 5 is connected in series between the second oil inlet 33 and the duplex gear pump 2. The oil suction filter 6 is located at the oil outlet 11. Preferably, the oil suction filter 6 is located within the oil outlet 11 or connected in series to the pipeline between the duplex gear pump 2 and the oil outlet 11. The oil filling pipe 8 is located on the side of the transmission housing 1. The mounting base 1a1, duplex gear pump 2, oil outlet 11, and oil filling pipe 8 are all located on the same side of the transmission housing 1.

[0042] See also Figure 1 and Figure 4In this embodiment, there are three second control valve groups 4, all of which are connected to the first control valve group 3 by pipeline. The three second control valve groups 4 are respectively arranged on the side opposite to the side where the first control valve group 3 is located on the front cover 1a and on both sides of the rear cover 1b. The first control valve group 3 also includes a fifth interface 38 and a sixth interface 39 arranged on the first external connection surface 312. The fifth interface 38 is connected to the second oil inlet 33 through an oil passage provided inside the first valve body 31. The second control valve group 4 is connected to the fifth interface 38 by a pipeline. The sixth interface 39 is connected to the first oil inlet 32 ​​through an oil passage provided inside the first valve body 31.

[0043] The hydraulic medium passes through the oil outlet 11 of the transmission housing 1, the second oil pump 22, and the lubricating oil subsystem, forming a lubricating oil circuit. The lubricating oil subsystem includes a first lubricating oil circuit and a second lubricating oil circuit. The first lubricating oil circuit is connected to the lubricating oil circuits of the first oil pump 21 and / or the second oil pump 22. The second lubricating oil circuit is connected to the lubricating oil circuits of the transmission and / or clutch within the transmission housing 1. The sixth port 39 is connected to the first lubricating oil circuit, directing oil to the duplex gear pump 2 to lubricate the duplex gear pump 2.

[0044] See also Figure 6 and Figure 7 The second control valve assembly 4 includes a second valve body 41, a third oil inlet 42 disposed on the second valve body 41, a seventh port 43, and an eighth port 44. The second valve body 41 includes a second mounting surface 411 connected to the transmission housing 1 and a non-mounting surface 412 not in contact with the transmission housing 1. The third oil inlet 42 is disposed on the non-mounting surface 412 and communicates with the fifth port 38 via a pipeline. The seventh port 43 is disposed on the second mounting surface 411 and connected to the third oil inlet 42 via an oil passage disposed within the second valve body 41.

[0045] The second control valve assembly 4 also includes two second synchronizer solenoid valves 4a, which are mounted on the non-mounting surface 412. These second synchronizer solenoid valves 4a are connected in series to the parallel oil circuit where the seventh port 43 is located. An eighth port 44 is provided on the second mounting surface 411 and communicates with the corresponding oil return port 12 on that side. The eighth port 44 is connected to the oil return port of the second synchronizer solenoid valve 4a and communicates with the corresponding oil return port 12 on the transmission housing 1, allowing oil returning from the hydraulic subsystem to flow directly into the transmission housing 1.

[0046] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A hydraulic assembly for a gearbox, characterized in that: include: A gearbox housing, wherein an oil outlet is provided at the bottom of the gearbox housing, and the gearbox comprises a front cover and a rear cover, both sides of the front cover are provided with an oil return port and a hydraulic oil inlet, and one side is also provided with a lubricating oil port; a duplex gear pump, the duplex gear pump being mounted on a side surface of the transmission housing; a first control valve group, which is arranged on one side of the rear end cover and includes a first valve body, a first oil inlet, a second oil inlet, a first interface, a second interface, and a third interface provided on the first valve body; the first valve body includes a first mounting surface connected to the transmission housing, a first external connecting surface arranged opposite to the first mounting surface, and a second external connecting surface and a third external connecting surface located on both sides of the first external connecting surface; the first interface, the second interface, and the third interface are all provided on the first mounting surface and are respectively connected to the lubricating oil port, the return oil port, and the hydraulic oil inlet; the first oil inlet and the second oil inlet are both provided on the first external connecting surface and are both connected to the duplex gear pump via a pipeline; At least one second control valve group, the second control valve group is connected to the first control valve group pipeline, and the second control valve group is arranged on the opposite side of the front cover to the first control valve group and / or on both sides of the rear cover.

2. The hydraulic assembly for a transmission as claimed in claim 1, characterized in that: The first control valve group also includes multiple first clutch solenoid valves and multiple first synchronizer solenoid valves, the first clutch solenoid valves are arranged on the second external connecting surface, the first synchronizer solenoid valves are arranged on the third external connecting surface, and the first control valve group also includes a fourth interface arranged on the third external connecting surface.

3. The hydraulic assembly for a transmission as claimed in claim 2, characterized in that: It also includes an oil pressure filter connected in series between the first oil inlet and the duplex gear pump, an oil suction filter element arranged at the oil outlet, an accumulator connected to the fourth interface pipeline, and a refueling pipe arranged on the side of the machine body.

4. The hydraulic assembly for a transmission as claimed in claim 3, characterized in that: A mounting seat for mounting the first control valve group is provided on one side of the front end cover, and a hydraulic oil inlet, an oil return port and a lubricating oil port are provided on the mounting seat. The mounting seat, the double gear pump, the oil outlet and the refueling pipe are all located on the same side of the gearbox housing.

5. The hydraulic assembly for a transmission as claimed in claim 4, characterized in that: The first control valve group also includes a fifth interface and a sixth interface arranged on the first external connecting surface. The fifth interface is connected to the second oil inlet through an oil channel arranged inside the first valve body. The second control valve group is connected to the fifth interface through a pipeline, and the sixth interface is connected to the first oil inlet through an oil channel arranged inside the first valve body.

6. The hydraulic assembly for a transmission as claimed in claim 5, characterized in that: The second control valve group includes a second valve body, a third oil inlet provided on the second valve body, a seventh interface and an eighth interface. The second valve body includes a second mounting surface connected to the transmission housing and a non-mounting surface that is not in contact with the transmission housing. The third oil inlet is provided on the non-mounting surface and is connected to the fifth interface through a pipeline. The seventh interface is provided on the second mounting surface and is connected to the third oil inlet through an oil passage provided inside the second valve body. The eighth interface is provided on the second mounting surface and is connected to the oil return port on the side thereof.

7. The hydraulic assembly for a transmission as claimed in claim 6, characterized in that: The double gear pump includes a first oil pump and a second oil pump, the first oil pump is connected to the second oil inlet through a pipeline, the second oil pump is connected to the first oil inlet through a pipeline, and the oil outlet is connected to the second oil pump through a pipeline.

8. The hydraulic assembly for a transmission as claimed in claim 6, wherein: The second control valve group further includes two second synchronizer solenoid valves, which are installed on the non-installation surface.

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