Gearbox and tractor

Abstract

The application provides a gearbox and tractor, which comprises a shell provided with an oil cavity and an inspection hole in communication, the inspection hole being in communication with the external environment; an oil pump arranged in the oil cavity and fixedly connected with the shell; a filter arranged in the oil cavity, the first end of the filter being connected with the oil pump, the second end of the filter extending along the direction close to the inspection hole and being limitedly matched with the shell; and a plug cover covering the inspection hole and detachably connected with the shell. The application can reduce the arrangement space of the filter, when the filter needs to be maintained, only the plug cover needs to be removed to expose the inspection hole, and then external force is applied to the second end of the filter to take out the filter from the oil cavity, so that the cleaning and maintenance of the filter can be realized, the maintenance is more convenient, and the maintenance cost is saved.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to a gearbox and a tractor. Background Technology

[0002] In the field of agricultural machinery, tractors, as important power equipment, directly affect the efficiency and quality of agricultural production due to their performance. As a core component of the tractor's transmission system, the compactness and automation of the power shift gearbox are also important trends in the current industry development.

[0003] In related technologies, small tractors generally use integrated two-stage filtration systems or bottom-up circulating flushing filters. This approach requires an additional oil pump to drive the circulation, and an oil pipe needs to be connected between the filter and the gearbox, resulting in a large external profile of the gearbox, occupying layout space, and making maintenance inconvenient. Utility Model Content

[0004] The purpose of this application is to at least solve the problems of existing external transmission filters, which require additional oil pumps and oil lines, resulting in a large external profile, occupying space, and being inconvenient for maintenance. This purpose is achieved through the following technical solution:

[0005] The first aspect of this application proposes a gearbox, comprising:

[0006] The housing is provided with a connected oil chamber and an inspection port, the inspection port being in communication with the external environment;

[0007] An oil pump is disposed in the oil chamber and fixedly connected to the housing;

[0008] A filter is disposed in the oil chamber. The first end of the filter is connected to the oil pump, and the second end of the filter extends along the direction close to the inspection port and is limited and matched with the housing.

[0009] A plug that covers the access port and is detachably connected to the housing.

[0010] According to the transmission of this application, during operation, the oil pump is in the on state and begins to draw oil. The oil stored in the oil chamber is filtered by a filter, and the filtered oil then enters the oil pump and is distributed to the locations requiring lubrication. The filter is located inside the oil chamber of the housing, allowing for an internal filter arrangement that eliminates the need for an external oil pump and oil pipes, thus reducing the space required for filter placement. Since the second end of the filter extends along the direction close to the access port, and the plug is detachably connected to the housing, when the filter needs maintenance, simply remove the plug to expose the access port, apply external force to the second end of the filter, and remove the filter from the oil chamber. This allows for cleaning and maintenance without disassembling the transmission housing, making maintenance more convenient and saving maintenance costs.

[0011] In addition, the gearbox according to this application may also have the following additional technical features:

[0012] In some embodiments of this application, the oil pump has an oil suction port, and a sealing ring is provided at the first end of the filter, and the filter is sealed to the oil suction port through the sealing ring.

[0013] In some embodiments of this application, the filter includes a support cylinder and a first cover connected together. A sealing part is provided on the side of the first cover near the oil suction port. The sealing part is inserted and connected to the oil suction port. A sealing ring is sleeved on the periphery of the sealing part.

[0014] In some embodiments of this application, the filter further includes a second cover, which is disposed opposite to the first cover and connected to the end of the support cylinder away from the first cover; the housing has a first inner wall forming the inspection port, and a limiting gap is formed between the second cover and the first inner wall.

[0015] In some embodiments of this application, the second cover is provided with a connecting hole for connecting to an external tooling; or,

[0016] The second cover is provided with a connection hole, and the connection hole is provided with an operating component.

[0017] In some embodiments of this application, the gearbox further includes an elastic element, one end of which abuts against the plug and the other end of which abuts against the second end of the filter.

[0018] In some embodiments of this application, a limiting portion is provided on the side of the plug facing the access port, and the limiting portion is connected to the elastic element to limit the radial displacement of the elastic element.

[0019] In some embodiments of this application, the limiting portion includes a groove, the groove being recessed along a direction away from the filter, and the elastic element being fitted into the groove; or,

[0020] The limiting part includes a boss that protrudes along the direction close to the filter, and the elastic element is sleeved on the periphery of the boss.

[0021] In some embodiments of this application, the housing has a second inner wall on which a magnetic element is disposed, the magnetic element being used to adsorb impurities in the oil.

[0022] A second aspect of this application proposes a tractor including the gearbox as described above. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a gearbox according to one embodiment of this application;

[0025] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0026] Figure 3 for Figure 2 A schematic diagram of the filter structure in a transmission.

[0027] Figure 4 This is a schematic diagram of the structure of a gearbox according to another embodiment of this application;

[0028] Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle;

[0029] Figure 6 This is a schematic diagram of the structure of a gearbox according to another embodiment of this application.

[0030] The attached figures are labeled as follows:

[0031] 10. Housing; 11. First inner wall; 12. Second inner wall; 101. Oil cavity; 102. Inspection port;

[0032] 20. Oil pump; 21. Oil suction port;

[0033] 30. Filter; 31. Sealing ring; 32. Support cylinder; 321. Oil passage hole; 33. First cover; 331. Sealing part; 34. Second cover; 341. Connecting hole; 342. Operating component; 35. Filter screen; 301. First end; 302. Second end;

[0034] 40. End cap; 41. Limiting part; 411. Groove; 412. Boss;

[0035] 50. Elastic elements;

[0036] 60. Magnetic components. Detailed Implementation

[0037] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0038] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0040] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0041] like Figure 1 As shown, according to an embodiment of this application, a gearbox is proposed, including a housing 10, an oil pump 20, a filter 30, and a plug 40. The housing 10 is provided with a communicating oil chamber 101 and an inspection port 102, the inspection port 102 being in communication with the external environment; the oil pump 20 is disposed in the oil chamber 101 and fixedly connected to the housing 10; the filter 30 is disposed in the oil chamber 101, the first end 301 of the filter 30 is connected to the oil pump 20, and the second end 302 of the filter 30 extends along a direction close to the inspection port 102 and is limitedly matched with the housing 10; the plug 40 covers the inspection port 102 and is detachably connected to the housing 10.

[0042] In this embodiment, the first end 301 of the filter 30 is connected to the oil pump 20, which enables the filter 30 to be supported and positioned. The plug 40 covers the inspection port 102 to prevent oil leakage from the oil chamber 101. The plug 40 is detachably connected to the housing 10. For example, the inner wall of the housing 10 at the inspection port 102 is provided with an internal thread, and the plug 40 is provided with an external thread that mates with the internal thread. The plug 40 and the housing 10 are detachably connected through the threaded structure.

[0043] During operation, the oil pump 20 is in the on state and begins to draw oil. The oil stored in the oil chamber 101 is filtered by the filter 30. The filtered oil then enters the oil pump 20 and is distributed to the locations requiring lubrication. The filter 30 is located inside the oil chamber 101 of the housing 10, allowing for a built-in arrangement that eliminates the need for an external oil pump 20 and oil pipes, thus reducing the space required for the filter 30. Since the second end 302 of the filter 30 extends along the direction close to the access port 102, and the plug 40 is detachably connected to the housing 10, maintenance of the filter 30 is achieved simply by removing the plug 40 to expose the access port 102, applying external force to the second end 302 of the filter 30, and removing the filter 30 from the oil chamber 101. This eliminates the need to disassemble the gearbox housing 10, making maintenance more convenient and saving on maintenance costs.

[0044] In this embodiment, as Figure 2 As shown, the oil pump 20 has an oil suction port 21, and a sealing ring 31 is provided at the first end 301 of the filter 30. The filter 30 is sealed to the oil suction port 21 through the sealing ring 31. The sealing ring 31 enables a sealed fit between the filter 30 and the oil pump 20. Through the tension between the sealing ring and the oil pump and the friction between the oil pump and the filter, the filter 30 is initially limited in its axial direction. The oil stored in the oil chamber 101 is filtered by the filter 30. The filtered oil enters the oil pump 20 from the oil suction port 21 and is distributed to the corresponding lubrication positions to lubricate and cool the components that need lubrication.

[0045] Optionally, to improve the sealing between the plug 40 and the housing 10, a sealing element is provided around the periphery of the plug 40, and the plug 40 and the housing 10 are sealed together by the sealing element. The sealing element can be an ED ring (angled flat gasket), an O-ring, or a rubber gasket, etc.

[0046] In this embodiment, as Figure 2 and Figure 3 As shown, the filter 30 includes a support cylinder 32 and a first cover 33 connected to each other. The first cover 33 is disposed at one end of the support cylinder 32 near the oil pump 20. A sealing part 331 is provided on the side of the first cover 33 near the oil suction port 21. The sealing part 331 is inserted and connected to the oil suction port 21, and a sealing ring 31 is sleeved on the periphery of the sealing part 331. The support cylinder 32 is set as a rigid support member. When the support cylinder 32 and the first cover 33 are assembled into the filter 30, the support cylinder 32 can play a supporting role.

[0047] Looking back Figure 2The sealing part 331 can be configured as a cylindrical component, and the sealing part 331 and the first cover 33 can be configured as an integral structural component to improve the structural strength of the first cover 33. The sealing ring 31 is sleeved on the periphery of the sealing part 331, and the sealing part 331 achieves a sealed connection with the oil suction port 21 of the oil pump 20 through the sealing ring 31.

[0048] In this embodiment, as Figure 3 As shown, the filter 30 also includes a second cover 34. Along the axial direction of the support cylinder 32, the second cover 34 is disposed opposite to the first cover 33, and the second cover 34 is connected to the end of the support cylinder 32 away from the first cover 33; Figure 1 and Figure 4 As shown, the housing 10 has a first inner wall 11 forming an inspection port 102. A limiting gap t is formed between the second cover 34 and the first inner wall 11 to limit the circumferential movement of the second cover 34. The first cover 33, the support cylinder 32, and the second cover 34 are assembled to form a filter 30, so that the second end 302 of the filter 30 is connected to the housing 10. (Refer to...) Figure 5 The limiting gap t is formed between the first inner wall 11 and the outer wall of the second cover 34. The limiting gap can float within a certain range. During operation, due to factors such as the start-up of the oil pump 20 or external vibration, the second cover 34 of the filter 30 can abut against the first inner wall 11. The first inner wall 11 limits the radial displacement of the second cover 34. In this way, the filter 30 can be further limited relative to the oil pump 20.

[0049] In some embodiments, such as Figure 3 As shown, the second cover 34 is provided with a connection hole 341, which is used to connect with an external tooling. When the filter 30 needs to be maintained, simply remove the plug 40 to expose the inspection port 102, connect it to the connection hole 341 with an external tooling (e.g., bolts), and then apply external force to the external tooling to easily remove the filter 30 from the oil chamber 101, thus achieving the cleaning and maintenance of the filter 30.

[0050] In some other embodiments, such as Figure 1 As shown, the second cover 34 is provided with a connection hole 341, and the connection hole 341 is provided with an operating component 342 (e.g., a bolt). With the pre-installed operating component 342, when the filter 30 needs maintenance, it is only necessary to remove the plug 40 to expose the inspection port 102. At this time, there is no need to connect external tooling. By applying external force to the operating component 342, the filter 30 can be easily removed from the oil chamber 101, thus realizing the cleaning and maintenance of the filter 30.

[0051] like Figure 3As shown, the filter 30 also includes a filter screen 35, which is sleeved on the outside of the support cylinder 32. The support cylinder 32 is provided with an oil passage hole 321 that communicates with the oil chamber 101. By adsorbing impurities in the oil through the filter screen 35, the oil can be filtered. The filtered oil enters the main body of the oil pump 20 through the oil passage hole 321.

[0052] like Figure 1 , Figure 4 and Figure 6 As shown, in some embodiments, the gearbox further includes an elastic element 50, one end of which abuts against the plug 40, and the other end of which abuts against the second end 302 of the filter 30. The elastic element 50 may be a spring, which can limit the axial displacement of the filter 30 and absorb the vibration energy of the gearbox during operation, reducing the sway of the filter 30 relative to the oil pump 20.

[0053] This embodiment can also be combined with the foregoing embodiments to form other embodiments. For example, the second cover 34 is provided with a connecting hole 341, and the connecting hole 341 is provided with an operating member 342 (e.g., a bolt). The elastic element 50 is sleeved on the outside of the operating member 342. With this arrangement, the operating member 342 plays a guiding and limiting role on the elastic element 50, reducing the movement of the elastic element 50 relative to the plug 40, thereby always axially limiting the filter 30.

[0054] During the disassembly of the plug 40 and the elastic element 50, the elastic element 50 may be in a compressed state and may break open under its own elastic force. Therefore, a limiting part 41 is provided on the side of the plug 40 facing the inspection port 102. The limiting part 41 is used to limit the radial displacement of the elastic element 50 and prevent the elastic element 50 from breaking open during disassembly. The specific structural design is described below.

[0055] like Figure 4 and Figure 6 As shown, the plug 40 is provided with a limiting part 41 on the side facing the inspection port 102. The limiting part 41 is connected to the elastic element 50 to limit the radial displacement of the elastic element 50, prevent the elastic element 50 from breaking open during disassembly, and reduce the movement of the elastic element 50 relative to the plug 40, thereby always axially limiting the filter 30.

[0056] like Figure 4 As shown, the limiting part 41 includes a groove 411, which is recessed along a direction away from the filter 30, and the elastic element 50 is fitted into the groove 411. Specifically, the outer side of the elastic element 50 is press-fitted with the groove 411 of the second cover 34, thereby preventing the elastic element 50 from breaking open during disassembly and facilitating operation.

[0057] like Figure 6As shown, the limiting part 41 includes a boss 412, which protrudes along the direction close to the filter 30, and the elastic element 50 is sleeved on the periphery of the boss 412. Specifically, the outer side of the elastic element 50 is interference-fitted with the boss 412 of the second cover 34, thereby preventing the elastic element 50 from breaking open during disassembly and facilitating operation.

[0058] like Figure 4 and Figure 6 As shown, in some embodiments, the housing 10 has a second inner wall 12, on which a magnetic element 60 is disposed. The magnetic element 60 is used to adsorb impurities in the oil. The magnetic element 60 can adsorb impurities such as iron filings in the oil, thereby achieving preliminary filtration of the oil. The oil after preliminary filtration is then filtered a second time by the filter cleaner 30. The cleaned oil then enters the oil pump 20 to lubricate and cool the components.

[0059] This application also proposes a tractor including the gearbox as described above. Since the tractor includes the gearbox as described above, achieving a built-in filter arrangement, it naturally possesses the technical effects of the gearbox embodiments described above, which will not be elaborated upon here.

[0060] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gearbox, characterized in that, include: The housing (10) is provided with an oil cavity (101) and an inspection port (102) that are connected to each other, and the inspection port (102) is connected to the external environment; An oil pump (20) is disposed in the oil chamber (101) and fixedly connected to the housing (10); A filter (30) is disposed in the oil chamber (101). The first end (301) of the filter (30) is connected to the oil pump (20). The second end (302) of the filter (30) extends along the direction close to the inspection port (102) and is limited to the housing (10). A plug (40) covers the access port (102) and is detachably connected to the housing (10).

2. The gearbox according to claim 1, characterized in that, The oil pump (20) has an oil suction port (21), and a sealing ring (31) is provided at the first end (301) of the filter (30). The filter (30) is sealed to the oil suction port (21) through the sealing ring (31).

3. The gearbox according to claim 2, characterized in that, The filter (30) includes a support cylinder (32) and a first cover (33) connected to each other. A sealing part (331) is provided on the side of the first cover (33) near the oil suction port (21). The sealing part (331) is inserted and connected to the oil suction port (21). The sealing ring (31) is sleeved on the periphery of the sealing part (331).

4. The gearbox according to claim 3, characterized in that, The filter (30) further includes a second cover (34), which is disposed opposite to the first cover (33), and the second cover (34) is connected to the end of the support cylinder (32) away from the first cover (33); the housing (10) has a first inner wall (11) forming the inspection port (102), and a limiting gap is formed between the second cover (34) and the first inner wall (11).

5. The gearbox according to claim 4, characterized in that, The second cover (34) is provided with a connecting hole (341), which is used for connecting with an external tooling; or, The second cover (34) is provided with a connection hole (341), and the connection hole (341) is provided with an operating element (342).

6. The gearbox according to claim 1, characterized in that, The gearbox also includes an elastic element (50), one end of which abuts against the plug (40) and the other end of which abuts against the second end (302) of the filter (30).

7. The gearbox according to claim 6, characterized in that, The plug (40) is provided with a limiting part (41) on the side facing the inspection port (102), and the limiting part (41) is connected to the elastic element (50) to limit the radial displacement of the elastic element (50).

8. The gearbox according to claim 7, characterized in that, The limiting portion (41) includes a groove (411) that is recessed in a direction away from the filter (30), and the elastic element (50) is engaged with the groove (411); or, The limiting part (41) includes a boss (412) which is arranged to protrude in a direction close to the filter (30), and the elastic element (50) is sleeved on the periphery of the boss (412).

9. The gearbox according to any one of claims 1 to 8, characterized in that, The housing (10) has a second inner wall (12) on which a magnetic element (60) is provided, the magnetic element (60) being used to adsorb impurities in the oil.

10. A tractor, characterized in that, Including the gearbox as described in any one of claims 1 to 9.

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