Labyrinth structure for speed reducer shell

Abstract

The utility model belongs to the technical field of speed reducer shells, and particularly relates to a labyrinth structure for a speed reducer shell. A labyrinth structure for a speed reducer shell comprises the speed reducer shell, and an oil blocking mechanism and an oil blocking shell connected with the oil blocking mechanism are arranged in the speed reducer shell. Through ingenious design and connection of the first oil baffle plate, the first oil baffle rib, the first hollow column, the second oil baffle rib, the third oil baffle rib and the fourth oil baffle rib, a complex sealing system is formed, oil leakage is effectively prevented, and efficient operation of the speed reducer is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of speed reducer housing, specifically, the utility model relates to a labyrinth structure for speed reducer housing. BACKGROUND

[0002] The speed reducer is a key component for transmitting power and fixing transmission ratio, and the housing structure thereof is used for bearing and containing various parts, maintaining normal movement relationship and movement accuracy. The speed reducer housing needs to maintain the pressure and temperature in the inner cavity within a relatively stable range to ensure that each part can work normally. The existing speed reducer ventilation labyrinth structure needs a larger space to realize the related functions, and the increase of the volume of the speed reducer will cause the problem of small gap in the vehicle layout and increase the weight of the speed reducer. In addition, although the increased space at the top can maintain the dynamic balance of the oil and avoid leakage at the vent plug, it also leads to a large volume of the speed reducer assembly, which causes difficulties in the vehicle or electric drive assembly layout. The speed reducer housing labyrinth structure can improve the ventilation effect of the speed reducer, maintain stable pressure in the inner cavity, reduce the risk of oil seal and vent plug failure, and realize compact and efficient design without increasing the volume. The development and optimization of these technologies are crucial for improving the performance and reliability of the speed reducer.

[0003] Chinese patent (publication number: 208221561U) discloses a speed reducer housing and a speed reducer, the mounting wall of the speed reducer housing is provided with a plurality of interlaced reinforcing ribs, the top edge and the mounting wall of the speed reducer housing are surrounded by the reinforcing ribs to form a containing cavity with an opening, and a ventilation hole is formed in the containing cavity; the speed reducer housing further comprises a cover plate fixedly connected to the reinforcing ribs and covering the opening to block the lubricating oil from entering the containing cavity. CONTENT OF THE UTILITY MODEL

[0004] The utility model is to solve the above-mentioned problem and aims at providing a labyrinth structure for speed reducer housing, which has simple structure, light weight and small space occupation. In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0005] The utility model provides a labyrinth structure for speed reducer housing, which has the following characteristics: a speed reducer housing is provided with an oil blocking mechanism and an oil blocking housing connected to the oil blocking mechanism.

[0006] The oil blocking mechanism comprises a first oil blocking plate and a first oil blocking rib, one end of the first oil blocking plate is connected to the speed reducer housing, the other end of the first oil blocking plate is connected to the first oil blocking rib, one end of the first oil blocking rib is connected to the speed reducer housing, the first oil blocking plate, the first oil blocking rib and the speed reducer housing form a containing cavity, a first hollow column is arranged in the containing cavity, and an oil spilling port is arranged at the connection position of the first oil blocking rib and the first oil blocking plate.

[0007] The accommodating cavity is provided with a first hollow column, a second oil blocking rib is arranged between the first hollow column and the first oil blocking plate, and a third oil blocking rib and a fourth oil blocking rib are arranged between the first hollow column and the reducer housing.

[0008] The oil blocking shell comprises a second hollow column and a first connecting plate, the second hollow column is connected with the first hollow column, one end of the first connecting plate is connected with the second hollow column, the other end of the first connecting plate is connected with a second connecting plate, the first connecting plate is connected with a third connecting plate, the third connecting plate is located between the second connecting plate and the hollow column, a second oil blocking plate is connected on one side of the second connecting plate, the second oil blocking plate abuts against the first oil blocking plate, and the first connecting plate abuts against the second oil blocking rib, the third oil blocking rib and the fourth oil blocking rib.

[0009] The first slot is provided with a ventilation hole between the second oil blocking rib and the third oil blocking rib.

[0010] The third connecting plate is in a circular structure, the first connecting plate is distributed in a circular manner, and the first oil blocking plate and the second oil blocking plate are in a circular arc structure.

[0011] The ventilation hole is provided with at least one.

[0012] The first hollow column is provided with a reinforcing plate at a connecting position of the first hollow column and the reducer housing.

[0013] The first hollow column and the second hollow column are connected through bolts.

[0014] The technical effect of the utility model is that the oil liquid entering the accommodating cavity will continue to flow along the path between the first oil blocking plate and the first oil blocking rib. Due to the effects of the second oil blocking rib, the third oil blocking rib and the fourth oil blocking rib, the oil liquid cannot pass through the second oil blocking rib, the third oil blocking rib and the fourth oil blocking rib. The second oil blocking rib, the third oil blocking rib and the fourth oil blocking rib limit the flow path of the oil liquid, and the oil liquid needs to change direction multiple times when passing through the second oil blocking rib, the third oil blocking rib and the fourth oil blocking rib, thereby further reducing the risk of leakage, and the oil liquid is finally discharged through the oil discharge port. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present specification includes the following drawings, and the shown contents are as follows:

[0016] Fig. 1 It is the explosion drawing of the utility model;

[0017] Fig. 2 It is the structure schematic view of the oil blocking mechanism of the utility model.

[0018] The figure is marked: 1, the reducer housing; 2, the oil blocking mechanism; 201, the first oil blocking plate; 202, the first oil blocking rib; 203, the accommodating cavity; 204, the first hollow column; 205, the oil outlet; 206, the second oil blocking rib; 207, the third oil blocking rib; 208, the fourth oil blocking rib; 3, the oil blocking shell; 301, the second hollow column; 302, the first connecting plate; 303, the second connecting plate; 304, the third connecting plate; 305, the second oil blocking plate; 4, the air hole; 5, the reinforcing plate; 6, the bolt. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be further described below with reference to the accompanying drawings, and the description of the embodiments is to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present application, and to facilitate its implementation.

[0020] As Figs. 1-2 shown, a labyrinth structure for a reducer housing includes a reducer housing 1, an oil blocking mechanism 2 and an oil blocking shell 3 connected with the oil blocking mechanism 2 are arranged inside the reducer housing 1. The oil blocking mechanism 2 and the oil blocking shell 3 can block the oil splashing inside the labyrinth, ensuring the dryness inside the labyrinth; through the cooperative work of the oil blocking mechanism 2 and the oil blocking shell 3, the labyrinth structure can effectively control the flow of lubricating oil, ensuring the efficient operation of the reducer.

[0021] The oil blocking mechanism 2 includes a first oil blocking plate 201 and a first oil blocking rib 202, one end of the first oil blocking plate 201 is connected with the reducer housing 1, the other end of the first oil blocking plate 201 is connected with the first oil blocking rib 202, one end of the first oil blocking rib 202 is connected with the reducer housing 1, the first oil blocking plate 201, the first oil blocking rib 202 and the reducer housing 1 form an accommodating cavity 203, a first hollow column 204 is arranged in the accommodating cavity 203, and an oil outlet 205 is arranged at the connection position of the first oil blocking rib 202 and the first oil blocking plate 201. The first oil blocking plate 201, the first oil blocking rib 202 and the reducer housing 1 form an accommodating cavity 203 to provide a connection position for the second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208, the first hollow column 204 is threadedly connected with the second hollow column 301 for fixing the oil blocking shell 3, the oil outlet 205 allows oil to flow out of the labyrinth structure and back to the inner cavity of the reducer, avoiding excessive accumulation of oil in the accommodating cavity 203, resulting in excessive pressure. The design of the oil outlet 205 is usually a small hole, and the hole diameter can be adjusted according to actual needs.

[0022] The second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208 are elongated structures, the second oil blocking rib 206 is arranged between the first hollow column 204 and the first oil blocking plate 201, and the third oil blocking rib 207 and the fourth oil blocking rib 208 are arranged between the first hollow column 204 and the reducer shell 1. The second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208 further increase the flow path of the lubricating oil, so that the oil liquid needs to bypass the second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208 after passing through the first oil blocking plate 201 and the first oil blocking rib 202 to continue to flow, which guides the oil liquid flow and prevents the oil liquid from entering some areas, thereby reducing the potential risk of oil liquid leakage. Through the ingenious design and connection of the first oil blocking plate 201, the first oil blocking rib 202, the first hollow column 204, the second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208, a complex sealing system is formed, which effectively prevents oil leakage and ensures efficient operation of the reducer.

[0023] The oil blocking shell 3 includes a second hollow column 301 and a first connecting plate 302, the first connecting plate 302 is an elongated structure, the second hollow column 301 is threadedly connected with the first hollow column 204, one end of the first connecting plate 302 is connected with the second hollow column 301, the other end of the first connecting plate 302 is connected with a second connecting plate 303, the second connecting plate 303 wraps the first connecting plate 302 to form a closed structure; the first connecting plate 302 is connected with a third connecting plate 304, the third connecting plate 304 is located between the second connecting plate 303 and the second hollow column 301, the second connecting plate 303 is an annular structure and can wrap the second hollow column 301 to form a two-stage sealing structure; the second connecting plate 303 is connected with a second oil blocking plate 305 on one side, the second oil blocking plate 305 abuts against the first oil blocking plate 201, and the second oil blocking plate 305 can achieve a strong sealing effect to prevent oil leakage. The first connecting plate 302 abuts against the second oil blocking rib 206, the third oil blocking rib 207 and the fourth oil blocking rib 208, which can enhance the sealing effect.

[0024] The air vent hole 4 is arranged in the accommodating cavity 203 and located between the second oil blocking rib 206 and the third oil blocking rib 207. The air vent hole 4 plays a key role in the whole working process. The air vent hole 4 is located in the accommodating cavity 203, specifically between the second oil blocking rib 206 and the third oil blocking rib 207. The main function of the air vent hole 4 is to allow air circulation while ensuring sealing effect, avoiding the lubricating oil being squeezed out due to excessive internal pressure. When the pressure inside the speed reducer exceeds the external atmospheric pressure, air can be discharged through the air vent hole 4, avoiding the lubricating oil being squeezed out due to excessive internal pressure. Conversely, when the external atmospheric pressure is higher than the internal pressure, air can enter the interior through the air vent hole 4, avoiding the internal negative pressure. The air vent hole 4 ensures the balance of the internal pressure.

[0025] The third connecting plate 304 is a circular structure, mainly to enhance the stability and reliability of the whole structure. The third connecting plate 304 is usually designed in a circular structure, which can better adapt to the internal profile of the speed reducer housing 1, ensuring the sealing effect. The third connecting plate 304 is also connected with the first connecting plate 302, so that the second hollow column 301, the first connecting plate 302, the second connecting plate 303 and the third connecting plate 304 are connected into an integral structure, improving the stability and reliability of the whole system.

[0026] The first connecting plate 302 is circumferentially distributed, which can better form a labyrinth structure, thus better adapting to the internal profile of the speed reducer housing 1 and ensuring the sealing effect. The first oil blocking plate 201 and the second oil blocking plate 305 are in a circular arc structure. It can better adapt to the internal profile of the speed reducer housing 1, ensuring the sealing effect. The shape of the first oil blocking plate 201 is usually a circular arc, which can better adapt to the internal profile of the speed reducer housing 1, ensuring the sealing effect. The first oil blocking plate 201 blocks the direct outflow of oil. At the same time, the first oil blocking plate 201 also plays a role in guiding the flow of oil.

[0027] The air vent hole 4 is at least one. The air vent hole 4 is an important structure in the labyrinth structure, which allows air circulation while ensuring sealing effect, avoiding excessive internal pressure. The air vent hole 4 is located in the accommodating cavity 203, specifically between the second oil blocking rib 206 and the third oil blocking rib 207. On the one hand, it can avoid the air vent hole 4 being directly exposed to the main flow path of the oil, reducing the risk of oil leakage through the air vent hole 4; on the other hand, the position of the air vent hole 4 can effectively balance the internal and external pressures, avoiding the oil being squeezed out due to excessive internal pressure.

[0028] The first hollow column 204 is provided with a reinforcing plate 5 at the connection position with the reducer housing 1. The reinforcing plate 5 can increase the connection strength between the first hollow column 204 and the reducer housing 1. The reinforcing plate 5 is generally annular in shape, which can better adapt to the geometry of the connection between the first hollow column 204 and the differential housing 1, ensure that its installation and fixation are more firm, and the thickness of the reinforcing plate 5 is generally between 2-5 mm. The reinforcing plate 5 can provide sufficient strength without affecting the overall performance of the system.

[0029] The first hollow column 204 is connected with the second hollow column 301 through the bolt 6. Connecting the first hollow column 204 with the second hollow column 301 through the bolt 6 can increase the connection strength between them, making the connection of the first hollow column 204 with the second hollow column 301 more stable.

[0030] Effects of the embodiment

[0031] The oil entering the containing cavity 203 will continue to flow along the path between the first oil baffle plate 201 and the first oil baffle rib 202. Due to the action of the second oil baffle rib 206, the third oil baffle rib 207 and the fourth oil baffle rib 208, the oil cannot pass through the second oil baffle rib 206, the third oil baffle rib 207 and the fourth oil baffle rib 208. The second oil baffle rib 206, the third oil baffle rib 207 and the fourth oil baffle rib 208 limit the flow path of the oil, and the oil needs to change direction multiple times when passing through the second oil baffle rib 206, the third oil baffle rib 207 and the fourth oil baffle rib 208, further reducing the risk of leakage, and the oil is finally discharged through the oil drain port 205.

[0032] The vent hole 4 allows air to circulate while ensuring sealing effect, avoiding the extrusion of lubricating oil caused by excessive internal pressure. When the pressure inside the reducer exceeds the external atmospheric pressure, air can be discharged through the vent hole 4 to avoid the extrusion of lubricating oil caused by excessive internal pressure. Conversely, when the external atmospheric pressure is higher than the internal pressure, air can enter the interior through the vent hole 4 to avoid negative pressure inside. The vent hole 4 ensures the balance of internal pressure.

[0033] The above has been described by way of example with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-mentioned manner. As long as various non-essential improvements are made by adopting the method concept and technical solution of the present application; or without improvement, the above-mentioned concept and technical solution of the present application are directly applied to other occasions, all within the protection scope of the present application.

Claims

1. A labyrinth structure for a reducer housing, characterized in that: The invention comprises a reducer housing (1), wherein an oil baffle mechanism (2) and an oil baffle housing (3) connected to the oil baffle mechanism (2) are provided inside the reducer housing (1); the oil baffle mechanism (2) comprises a first oil baffle plate (201) and a first oil baffle rib (202); one end of the first oil baffle plate (201) is connected to the reducer housing (1); the other end of the first oil baffle plate (201) is connected to the first oil baffle rib (202); one end of the first oil baffle rib (202) is connected to the reducer housing (1); the first oil baffle plate (201), the first oil baffle rib (202) and the reducer housing (1) form an accommodating cavity (203); an oil discharge port (205) is provided at the connection position between the first oil baffle rib (202) and the first oil baffle plate (201).

2. The labyrinth structure for a reducer housing according to claim 1, characterized in that: A first hollow column (204) is provided in the accommodating cavity (203), a second oil-blocking rib (206) is provided between the first hollow column (204) and the first oil-blocking plate (201), and a third oil-blocking rib (207) and a fourth oil-blocking rib (208) are provided between the first hollow column (204) and the reducer housing (1).

3. The labyrinth structure for a reducer housing according to claim 2, characterized in that: The oil baffle housing (3) comprises a second hollow column (301) and a first connecting plate (302), wherein the second hollow column (301) is connected to the first hollow column (204), one end of the first connecting plate (302) is connected to the second hollow column (301), and the other end of the first connecting plate (302) is connected to the second connecting plate (303), the first connecting plate (302) is connected to the third connecting plate (304), and the third connecting plate (304) is located between the second connecting plate (303) and the second hollow column (301), one side of the second connecting plate (303) is connected to the second oil baffle plate (305), the second oil baffle plate (305) is abutted against the first oil baffle plate (201), and the first connecting plate (302) is abutted against the second oil baffle rib (206), the third oil baffle rib (207) and the fourth oil baffle rib (208).

4. The labyrinth structure for a reducer housing according to claim 3, characterized in that: A vent hole (4) is provided in the accommodating cavity (203), and the vent hole (4) is located between the second oil-blocking rib (206) and the third oil-blocking rib (207).

5. The labyrinth structure for a reducer housing according to claim 4, characterized in that: The third connecting plate (304) is a circular structure, the first connecting plates (302) are distributed in a circumferential manner, and the first oil baffle plate (201) and the second oil baffle plate (305) are arc-shaped structures.

6. The labyrinth structure for a reducer housing according to claim 5, characterized in that: There is at least one vent hole (4).

7. The labyrinth structure for a reducer housing according to claim 6, characterized in that: A reinforcing plate (5) is provided at the connection position between the first hollow column (204) and the reducer housing (1).

8. The labyrinth structure for a reducer housing according to claim 3, characterized in that: The first hollow column (204) and the second hollow column (301) are connected via bolts (6).

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