Structure for reducing oil injection amount of gearbox

Abstract

The utility model discloses a structure for reducing the oil injection amount of a gearbox, which belongs to a weight reduction structure of the gearbox and solves the problems that the cost of a mould related to the gearbox is increased and the development period is prolonged if the oil injection amount is reduced by changing the structure of the gearbox which is shaped in a trial-manufacture stage. One end face and at least one side face of the filling block are connected with the inner wall of the clutch shell in an attached mode and used for limiting the filling block. The structural design of the filling block is compatible with the structure of the clutch shell, and the function of an original structure can be prevented from being affected after assembly. The two end faces of the filling block are connected with the clutch shell and the transmission shell through point limiting structures and used for limiting the two ends of the filling block. The structural design of the filling block integrates the structures of the clutch shell and the transmission shell, a new mold does not need to be developed, and the function of the original structure can be prevented from being influenced after assembly.

Description

Technical Field

[0001] The utility model belongs to the weight reduction structure of a gearbox, and particularly relates to a structure for reducing the oil filling amount of a gearbox. Background Technique

[0002] With the steady growth of the global automotive market and the increasing demand of consumers for economy and comfort, the industry has higher requirements for the high efficiency, low cost, energy conservation and environmental protection of gearboxes. Through research, it is found that reducing the oil filling amount in the gearbox can reduce the temperature rise, reduce the oil churning loss, improve the transmission efficiency, and also maintain a lower fuel consumption, reducing the use cost of customers. For a gearbox that has been finalized in the trial production stage, if the gearbox structure is changed to reduce the oil filling amount, the mold cost related to the gearbox will increase and the development cycle will be prolonged.

[0003] Chinese Patent CN218818000U discloses an oil retaining assembly and a gearbox housing, including a transmission housing and a clutch housing arranged opposite to the transmission housing. A gear assembly is arranged between the transmission housing and the clutch housing. A vent hole is embedded in the transmission housing. The oil retaining assembly includes a first oil retaining member arranged in the transmission housing and a second oil retaining member arranged in the clutch housing. The first oil retaining member and the second oil retaining member are arranged between the gear assembly and the vent hole. After the first oil retaining member and the second oil retaining member are closed, a three-stage barrier can be formed between the gear assembly and the vent hole, effectively solving the oil leakage problem at the vent hole of the gearbox without affecting the normal conduction of gas in the vent hole and without reducing the internal space of the gearbox, and improving the oil retaining quality. However, this patent does not reduce the internal space of the gearbox, and the oil filling amount in the gearbox has not changed, so it cannot meet the requirements of improving efficiency and reducing energy consumption.

[0004] Chinese Patent CN218818008U discloses a middle housing of an aluminum alloy gearbox, including a central disk body. The edge of the central disk body has a first side wall and a second side wall extending towards both ends respectively. The edge of the first side wall far from the central disk body has a first skirt extending outwards. The central disk body is provided with a plurality of shaft hole structures penetrating both end faces. The central disk body is provided with a sunk groove on one end face, and a sensor installation hole penetrating the other end face of the central disk body is provided on the bottom surface of the sunk groove. By arranging a central disk body structure near the middle in the housing, this patent provides additional auxiliary support for the shaft body located in the gearbox. Even for a relatively long transmission shaft, it will be very stable under the action of three support points. The transmission shaft has a smaller amplitude when connecting torque and a longer service life. However, in this patent, the structure of the gearbox is changed, resulting in an increase in mold cost and an extension of the development cycle. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a structure for reducing the oil filling amount of a gearbox to solve the problem that for a gearbox that has been finalized in the trial production stage, if the gearbox structure is changed to reduce the oil filling amount, the mold cost related to the gearbox will increase and the development cycle will be extended.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A structure for reducing the oil filling amount of a gearbox, which is connected in the closed space formed by the clutch housing and the transmission housing to form an oil filling cavity. The special feature is that it includes a filling block;

[0008] One end face and at least one side face of the filling block are respectively attached and connected to the inner wall of the clutch housing for limiting the filling block. Among them, the structural design of the filling block takes into account the structure of the clutch housing and can avoid affecting the function of the original structure after assembly;

[0009] The two end faces of the filling block are connected to the clutch housing and the transmission housing through a point limiting structure for limiting the two ends of the filling block.

[0010] Through the above axial limiting and circumferential limiting, it can avoid its movement affecting the normal transmission of the gear pair in the gearbox.

[0011] Further, the point limiting structure includes a first boss and a second boss;

[0012] The first boss is connected to one end face of the filling block, and a first limiting hole adapted to the first boss is opened on the clutch housing. The first boss is connected in the first limiting hole for limiting one end face of the filling block;

[0013] The second boss is connected to the other end face of the filling block, and a second limiting hole adapted to the second boss is opened on the transmission housing. The second boss is connected in the second limiting hole for limiting the other end face of the filling block.

[0014] Further, two faces of the filling block are respectively attached and connected to the inner wall of the clutch housing. The two faces are the bottom side face and the end face away from the transmission housing, taking into account the structure of the clutch housing itself and playing a role in limiting the connection of the filling block.

[0015] Further, a hole is opened on the filling block, and the hole is aligned with the position of the observation oil passage of the clutch housing to facilitate the observation of the oil level.

[0016] Further, a plurality of bolt avoidance holes are opened on one end face of the filling block away from the transmission housing for avoiding the bolt package connected inside the clutch housing and ensuring the normal function of the bolt package for fastening the front end cover of the clutch housing.

[0017] Further, the filling block includes a bottom block and a side block. One side of the bottom block is connected to the side block, forming a broken-line slope structure therewith, and the included angle of the broken-line slope structure is 140°-145°. The bottom surfaces of the bottom block and the side block and the end surfaces away from the transmission housing respectively correspond to and are adhesively connected to the inner wall of the clutch housing. The two end surfaces of the side block are respectively connected to a first boss and a second boss. By adopting the broken-line slope structure, on the one hand, the oil stirred up by splash lubrication can flow back into the oil sump in the gearbox along the slope surface, and on the other hand, it also avoids the gear on the right intermediate shaft assembled inside the clutch housing.

[0018] Further, a plurality of bolt avoidance holes are formed in one end surface of the bottom block and / or the side block away from the transmission housing.

[0019] Further, the side surface of the side block also corresponds to and is adhesively connected to the inner wall of the clutch housing.

[0020] Further, the filling block is a hollow aluminum alloy block, which reduces weight and at the same time reduces the material energy consumption cost.

[0021] Further, the length of the filling block is the same as the inner space length of the clutch housing, which can improve the connection stability between the filling block and the clutch housing and the transmission housing.

[0022] The beneficial effects of the present utility model are as follows:

[0023] (1) For the structure for reducing the oil filling amount of the gearbox of the present utility model, by filling the closed space formed by the clutch housing and the transmission housing with the filling block, the oil filling amount can be reduced. At the same time, the structural design of the filling block takes into account the structures of the clutch housing and the transmission housing itself, and can avoid affecting the functions of the original structures after assembly;

[0024] (2) In the structure for reducing the oil filling amount of the gearbox of the present utility model, one end surface and at least one side surface of the filling block are adhesively connected to the inner wall of the clutch housing to achieve axial limit and circumferential limit; and the two end surfaces of the filling block are respectively connected to the clutch housing and the transmission housing through the first boss and the second boss to further limit the axial direction; ensuring the connection stability of the filling block and avoiding its displacement from affecting the normal transmission of the gear pair in the gearbox;

[0025] (3) In the structure for reducing the oil filling amount of the gearbox of the present utility model, the filling block adopts a broken-line slope structure. On the one hand, the oil stirred up by splash lubrication can flow back into the oil sump in the gearbox along the slope surface, and on the other hand, it also avoids the gear on the right intermediate shaft assembled inside the clutch housing;

[0026] (4) In the structure for reducing the oil filling amount of the gearbox of the present utility model, the filling block is a hollow aluminum alloy block, which reduces weight and at the same time reduces the material energy consumption cost;

[0027] (5) The structure of the present utility model for reducing the oil filling amount of the transmission also has the advantages of simple assembly, reduced oil filling amount, and ensuring normal lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 1 is an exploded assembly view of Embodiment 1 of the structure of the present utility model for reducing the oil filling amount of the transmission with the clutch housing and the transmission housing;

[0029] Figure 2 FIG. 2 is a schematic structural view of Embodiment 1 of the structure of the present utility model for reducing the oil filling amount of the transmission;

[0030] Figure 3 FIG. 3 is a schematic structural view of the clutch housing used in Embodiment 1 of the structure of the present utility model for reducing the oil filling amount of the transmission;

[0031] Figure 4 FIG. 4 is a schematic structural view of the transmission housing used in Embodiment 1 of the structure of the present utility model for reducing the oil filling amount of the transmission;

[0032] Figure 5 FIG. 5 is a cross-sectional view of Embodiment 2 of the structure of the present utility model for reducing the oil filling amount of the transmission after being assembled between the clutch housing and the transmission housing.

[0033] The description of the reference numerals is as follows:

[0034] 1. Clutch housing, 1-1. Bolt package, 1-2. First limit hole, 1-3. Reinforcing rib, 1-4. Observation oil passage, 1-5. Clutch housing body; 2. Filling block; 3. Transmission housing, 3-1. Transmission housing body, 3-2. Second limit hole; 4. First boss; 5. Second boss; 6. Hole passage; 7. Bolt avoidance hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] Embodiment 1

[0037] The conventionally used transmission is formed by connecting a clutch housing 1 and a transmission housing 3 to form a closed space for oil filling. Based on the conventionally used transmission, this embodiment designs a structure for reducing the oil filling amount, which can not only ensure the normal progress of the R & D plan but also conform to the current development trend of energy conservation, cost reduction, and efficiency improvement.

[0038] A structure for reducing the oil filling amount of a gearbox provided by an embodiment of the present utility model includes a filling block 2 made of a hollow aluminum alloy structure, which is connected in a closed space formed by a clutch housing 1 and a transmission housing 3 to form a new oil filling cavity. The exploded view after its disassembly and assembly is as shown in Figure 1 ; wherein, on the one hand, the clutch housing 1 supports the filling block 2, and on the other hand, it cooperates with the transmission housing 3 to limit the filling block 2 to prevent it from moving and affecting the normal transmission of the gear pair in the gearbox; the filling block 2 is located inside the clutch housing 1 of the gearbox, occupying the space volume of the lubricating oil. On the premise of not affecting the structure and performance of the original clutch housing 1 and transmission housing 3, the requirement of reducing the oil filling amount is taken into account.

[0039] As shown in Figure 2 , two end faces of the filling block 2 are respectively connected with a first boss 4 and a second boss 5.

[0040] As shown in Figure 3 , it is a schematic structural view of the clutch housing 1, including a clutch housing body 1-5, a bolt package 1-1 connected inside the clutch housing body 1-5, a first limiting hole 1-2 opened inside the clutch housing body 1-5, a reinforcing rib 1-3 connected inside the clutch housing body 1-5, and an observation oil hole 1-4 for facilitating the observation of the oil level. The first boss 4 is connected into the first limiting hole 1-2, and can limit one end face of the filling block 2.

[0041] As shown in Figure 4 , the transmission housing 3 includes a transmission housing body 3-1 and a second limiting hole 3-2 opened on the transmission housing body 3-1. The second boss 5 is connected into the second limiting hole 3-2, and can limit the other end face of the filling block 2.

[0042] The structural design of the first boss 4, the second boss 5, the first limiting hole 1-2 and the second limiting hole 3-2 can, on the one hand, ensure that the position change of the filling block 2 relative to the overall gearbox is not large, and on the other hand, make the assembly simple. During assembly, the first boss 4 connected to the filling block 2 is placed into the first limiting hole 1-2 along the wall surface conforming to the clutch housing 1, and then the transmission housing 3 can be assembled.

[0043] In this embodiment, as shown in Figure 2 , a hole 6 is opened on the filling block 2, and the hole 6 is opposite to the position of the observation oil passage of the clutch housing 1, which is convenient for observing the oil level.

[0044] The filling block 2 includes a bottom block and side blocks. One side of the bottom block is connected to the side blocks, and a broken-line slope structure is formed on the inner surfaces of the bottom block and the side blocks. The included angle of the broken-line slope structure is 143°. The bottom side surfaces of the bottom block and the side blocks and the end faces away from the transmission case 3 are respectively in corresponding fitting connection with the inner wall of the clutch case 1 for limiting the filling block 2, which can improve the stability of the filling block 2 in the gearbox and prevent it from moving around and affecting the normal transmission of the gear pairs in the gearbox. The two end faces of the side blocks are respectively connected to the first boss 4 and the second boss 5. In this embodiment, the broken-line slope structure can, on the one hand, allow the oil stirred up by splash lubrication to flow back along the slope surface into the oil sump in the gearbox, and on the other hand, avoid the gears on the right intermediate shaft assembled inside the clutch case 1.

[0045] As Figure 1 and Figure 2 shown, a bolt avoidance hole 7 is opened on an end face of the bottom block away from the transmission case 3 for passing through the bolt package 1-1 to ensure the normal function of the bolt package 1-1 for fastening the front cover of the clutch case 1.

[0046] The length of the filling block 2 is the same as the length of the inner space of the clutch case 1, which can prevent the filling block 2 from shaking in the gearbox.

[0047] After the structure for reducing the oil filling amount of the gearbox in this embodiment is assembled, the filling block 2 can occupy the space volume for storing oil inside the box body. Then, when filling oil into the gearbox, under the condition of the same oil level height, the oil filling amount of the gearbox can be reduced. The hollow aluminum alloy block is used for filling, and the surface of the filling block facing the inner side of the oil filling cavity is designed with a broken-line slope structure. On the one hand, it can allow the oil stirred up by splash lubrication to flow back along the slope surface into the oil sump in the box, and on the other hand, it can also avoid the gears on the right intermediate shaft assembled inside the clutch housing.

[0048] Embodiment 2

[0049] Different from Embodiment 1, three surfaces of the filling block 2 are in fitting connection with the clutch case 1. In addition to the bottom side surfaces of the bottom block and the side blocks and the end faces away from the transmission case 3, one side surface of the side block is also in fitting connection with the clutch case 1. The sectional view of the structure for reducing the oil filling amount of the gearbox in this embodiment after assembly is as Figure 5 shown, and the stability of the filling block 2 in the clutch case 1 is further improved in this embodiment.

[0050] As mentioned above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A structure for reducing the oil filling amount of a gearbox, which is connected in a closed space formed by a clutch housing (1) and a transmission housing (3) to form an oil filling cavity, and is characterized in that: It includes a filling block (2); One end face and at least one side face of the filling block (2) are respectively in close connection with the inner wall of the clutch housing (1) for limiting the filling block (2); Two end faces of the filling block (2) are connected to the clutch housing (1) and the transmission housing (3) through point limiting structures for limiting both ends of the filling block (2).

2. The structure for reducing the oil filling amount of a gearbox according to claim 1, wherein: The point limiting structure includes a first boss (4) and a second boss (5); The first boss (4) is connected to one end face of the filling block (2). A first limiting hole adapted to the first boss (4) is formed in the clutch housing (1), and the first boss (4) is connected in the first limiting hole for limiting one end face of the filling block (2); The second boss (5) is connected to the other end face of the filling block (2). A second limiting hole adapted to the second boss (5) is formed in the transmission housing (3), and the second boss (5) is connected in the second limiting hole for limiting the other end face of the filling block (2).

3. The structure for reducing the oil filling amount of a gearbox according to claim 1, wherein: Two faces of the filling block (2) are respectively in close connection with the inner wall of the clutch housing (1), and the two faces are the bottom side face and the end face far from the transmission housing (3).

4. A structure for reducing the oil filling amount of a gearbox according to claim 1, characterized in that: A duct (6) is formed in the filling block (2), and the duct (6) is aligned with the position of the observation oil duct in the clutch housing (1).

5. The structure for reducing the oil filling amount of a gearbox according to claim 1, wherein: A plurality of bolt avoidance holes (7) are formed in one end face of the filling block (2) far from the transmission housing (3) for avoiding the bolt package connected in the clutch housing (1).

6. The structure for reducing the oil filling amount of a gearbox according to claim 2, wherein: The filling block (2) includes a bottom block and a side block. One side of the bottom block is connected to the side block, and a broken line slope structure is formed on the inner surfaces of the bottom block and the side block, and the included angle of the broken line slope structure is 140° - 145°; the bottom side face and the end face far from the transmission housing (3) of the bottom block and the side block are respectively in corresponding close connection with the inner wall of the clutch housing (1), and both end faces of the side block are respectively connected to the first boss (4) and the second boss (5).

7. The structure for reducing the oil filling amount of a gearbox according to claim 6, wherein: A plurality of bolt avoidance holes (7) are formed in one end face of the bottom block and / or the side block far from the transmission housing (3).

8. The structure for reducing the oil filling amount of a gearbox according to claim 6, wherein: The side face of the side block is also in close connection with the inner wall of the clutch housing (1).

9. The structure for reducing the oil filling amount of a gearbox according to claim 1, characterized in that: The filling block (2) is a hollow aluminum alloy block.

10. The structure for reducing the oil filling amount of a gearbox according to claim 1, characterized in that: The length of the filling block (2) is the same as the length of the inner space of the clutch housing (1).

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