Lubricating device for speed reducer shell of new energy automobile

Abstract

The utility model discloses a new energy automobile speed reducer shell lubricating device, relates to the technical field of speed reducers, and can realize comprehensive lubrication of all parts in a shell. According to the new energy automobile speed reducer shell lubricating device, an output shaft bearing hole is formed in a motor side shell, and the motor side shell is provided with a forward oil blocking structure, a reverse oil blocking rib, a forward guide oil hole and a reverse guide oil hole; the reverse oil baffle rib is of a U-shaped structure; when the motor rotates forwards, the output shaft of the speed reducer is driven to rotate clockwise, the cavity of the speed reducer is deep so that lubricating oil can move in the shell, the forward oil blocking structure can be used for blocking the lubricating oil, and the lubricating oil flows into the forward guide oil hole and then flows between the output shaft and the oil seal along the structure of the hole; when the motor rotates reversely, the output shaft of the speed reducer is driven to rotate anticlockwise, lubricating oil is driven to move in the shell, the two sides of the U shape of the reverse oil blocking rib can be used for blocking lubricating oil liquid, and the lubricating oil liquid flows into the position between the output shaft and the oil seal along the reverse guide oil hole.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a lubrication device for the housing of a speed reducer in a new energy vehicle. Background Technology

[0002] Currently, the main function of new energy reducers is to reduce speed and increase torque. The higher the speed of the reducer, the higher the lubrication requirements of the bearing. The traditional reducer housing mainly lubricates the bearing part, and the method used is to groove or drill holes in the part near the bearing hole to collect the oil flowing down the inner wall of the housing.

[0003] However, the inventors of this application have discovered that lubrication at both ends of the output shaft is also crucial. The internal / external splines of the output shaft need to mesh with external parts to transmit speed and torque. However, since the ends of some output shafts are generally long and close to the oil seal position on the outer end face of the bearing hole of the housing, the output shaft may not be lubricated or may be easily overlooked. In practical applications, if the shaft ends are not properly lubricated, it will cause adverse consequences such as burning, wear, glue, and plastic deformation of the output shaft.

[0004] In other words, the conventional reducer housing in the prior art mainly has the following drawbacks:

[0005] (1) Traditional reducer housings focus on bearing lubrication and use the inner wall of the housing to reduce the temperature of the oil in the reducer, thus neglecting the lubrication between the output shaft and the oil seal;

[0006] (2) The oil guiding structure of the reducer is roughly divided into two types: slotting and drilling. The high-speed rotation of the gears is used to splash lubricate the bearing structure. The existing oil guiding structure is too simple and the amount of lubricating oil collected on the inner wall of the housing is limited. When the gear in the housing is too large or the differential is too long, but the amount of lubricating oil is limited, the oil cannot enter between the output shaft and the oil seal, resulting in insufficient lubrication between the two ends of the output shaft and the oil seal.

[0007] (3) In traditional reducers, when the output shaft meshes with the outer parts of the housing, there is not enough lubricating oil for lubrication, which leads to the burning, wear, glue and plastic deformation of both ends of the output shaft.

[0008] (4) Because a ventilation device needs to be installed on the outside of the reducer housing, a labyrinth structure needs to be designed inside. The traditional labyrinth structure is a double-sealed joint surface of the motor side housing and the non-motor side housing. This structure lacks flexibility and convenience.

[0009] (5) The labyrinth structure in the housing of the traditional reducer is too simple, which leads to an increase in the temperature of the lubricating oil in the reducer and an increase in the pressure inside the housing. If the oil enters the labyrinth structure and cannot be discharged in time, the oil is easy to be sprayed out from the ventilation device when the pressure is too high or the pressure distribution is uneven.

[0010] Therefore, lubrication of both ends of the output shaft inside the reducer housing has always been a difficult problem and a neglected point in the industry. Utility Model Content

[0011] The purpose of this utility model is to provide a lubrication device for the gearbox housing of a new energy vehicle. It can ensure that the lubricating oil is fully splashed in the housing under the drive of the motor in forward / reverse rotation, and achieve comprehensive lubrication of all components in the housing. This effectively reduces the working temperature of the gear pairs, shafts and bearings, thereby improving the heat dissipation rate of the lubricating oil and ensuring that the gearbox can operate efficiently and have a long service life.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A lubrication device for a reducer housing in a new energy vehicle includes: a motor-side housing, wherein the motor-side housing is provided with an output shaft bearing hole, and the motor-side housing is provided with a forward oil-blocking structure and a reverse oil-blocking rib, as well as a forward guide oil hole and a reverse guide oil hole; the reverse oil-blocking rib has a U-shaped structure.

[0014] When the motor rotates forward, it drives the output shaft of the reducer to rotate clockwise. The reducer cavity is relatively deep, which allows the lubricating oil to move within the housing. The positive oil baffle structure can be used to block the lubricating oil, so the lubricating oil flows into the positive guide oil hole and then flows into the space between the output shaft and the oil seal along the structure of the hole to lubricate one side of the output shaft of the motor.

[0015] When the motor reverses, it drives the reducer output shaft to rotate counterclockwise, and drives the lubricating oil to move inside the housing. The U-shaped sides of the reverse oil baffle can be used to block the lubricating oil, so the lubricating oil flows into the space between the output shaft and the oil seal through the reverse guide oil hole to lubricate the output shaft side port of the motor housing.

[0016] In practical applications, the new energy vehicle reducer housing lubrication device further includes: a non-motor side housing, which is provided with a ventilation device and a labyrinth cover plate, and the labyrinth structure of the labyrinth cover plate can be used to divide the reducer cavity into two chambers; the labyrinth cover plate is arranged at the highest point in the housing cavity, and an oil unloading groove is provided at the lowest point of the two chambers.

[0017] Regardless of whether the motor drives the input shaft to rotate forward or backward, the lubricating oil can only enter the lowest chamber and cannot enter the chamber near the ventilation device, so as to ensure the normal flow of the lubricating oil and balance the internal and external pressure of the housing.

[0018] The labyrinth cover is fixed to the non-motor side housing by two hexagonal bolts.

[0019] Compared with existing technologies, the new energy vehicle reducer housing lubrication device of this utility model has the following advantages:

[0020] The lubrication device for the reducer housing of the new energy vehicle provided by this utility model adds a positive oil baffle structure and a reverse oil baffle rib on the motor side housing, thereby ensuring that the oil on the inner wall of the housing can be fully utilized and greatly increasing the contact area of ​​the lubricating oil, which is conducive to reducing the temperature of the lubricating oil inside the housing. At the same time, positive guide oil holes and reverse guide oil holes are added to the motor side housing, thereby ensuring that the output shaft ends and oil seals are well lubricated regardless of whether the motor rotates forward or reverse. It can also effectively prevent the output shaft ends from being burned, worn, glued, and plastically deformed due to excessive temperature when the splines inside and outside the output shaft mesh with the half shaft. Attached Figure Description

[0021] Figure 1 A schematic diagram of the motor side housing of the lubrication device for the reducer housing of a new energy vehicle provided in this embodiment of the utility model;

[0022] Figure 2 A cross-sectional view of the forward guide oil hole in the lubrication device for the reducer housing of a new energy vehicle provided in this embodiment of the utility model;

[0023] Figure 3 A cross-sectional view of the reverse guide oil hole in the lubrication device for the reducer housing of a new energy vehicle provided in this embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the non-motor side housing of the lubrication device for the reducer housing of a new energy vehicle provided in this embodiment of the utility model.

[0025] Figure label:

[0026] 1-Motor side housing; 2-Output shaft bearing hole; 3-Forward guide oil hole; 4-Reverse guide oil hole; 5-Forward oil baffle structure; 6-Reverse oil baffle rib; 7-Non-motor side housing; 8-Ventilation device; 9-Labyrinth cover; 10-Hex socket head cap bolt. Detailed Implementation

[0027] For ease of understanding, the lubrication device for the reducer housing of the new energy vehicle provided in the present invention will be described in detail below with reference to the accompanying drawings.

[0028] This utility model embodiment provides a lubrication device for the reducer housing of a new energy vehicle, such as... Figures 1-4 As shown, it includes: a motor side housing 1, the motor side housing 1 is provided with an output shaft bearing hole 2, and the motor side housing 1 is provided with a positive oil baffle structure 5 and a reverse oil baffle rib 6, as well as a positive guide oil hole 3 and a reverse guide oil hole 4; the reverse oil baffle rib 6 has a U-shaped structure;

[0029] When the motor rotates forward, it drives the output shaft of the reducer to rotate clockwise. The reducer cavity is relatively deep, which allows the lubricating oil to move within the housing. The forward oil baffle structure 5 can be used to block the lubricating oil, so the lubricating oil flows into the forward guide oil hole 3 and then flows into the space between the output shaft and the oil seal along the structure of the hole to lubricate one side of the output shaft of the motor.

[0030] When the motor reverses, it drives the reducer output shaft to rotate counterclockwise, and drives the lubricating oil to move inside the housing. The U-shaped sides of the reverse oil baffle 6 can be used to block the lubricating oil, so the lubricating oil flows into the space between the output shaft and the oil seal through the reverse guide oil hole 4 to lubricate the output shaft side port of the motor housing.

[0031] Compared with the prior art, the new energy vehicle reducer housing lubrication device described in this embodiment of the utility model has the following advantages:

[0032] In the lubrication device for the reducer housing of the new energy vehicle provided in this embodiment of the utility model, a forward oil baffle structure 5 and a reverse oil baffle rib 6 are added to the motor side housing 1, thereby ensuring that the oil on the inner wall of the housing can be fully utilized and greatly increasing the contact area of ​​the lubricating oil, which is conducive to reducing the temperature of the lubricating oil inside the housing; at the same time, a forward guide oil hole 3 and a reverse guide oil hole 4 are added to the motor side housing 1, thereby ensuring that the output shaft ends and oil seals can be well lubricated regardless of whether the motor rotates forward or reverse, and effectively preventing the output shaft ends from being burned, worn, glued, and plastically deformed due to excessive temperature when the splines inside and outside the output shaft mesh with the half shaft.

[0033] In practical applications, such as Figures 1-4 As shown in the figure, the new energy vehicle reducer housing lubrication device provided in this utility model embodiment may further include: a non-motor side housing 7, which may be provided with a ventilation device 8 and a labyrinth cover 9, and the labyrinth structure of the labyrinth cover 9 may be used to divide the reducer cavity into two chambers; the labyrinth cover 9 is arranged at the highest point in the housing cavity, and an oil unloading groove may be opened at the lowest point of the two chambers.

[0034] Regardless of whether the motor drives the input shaft to rotate forward or backward, the lubricating oil can only enter the lowest chamber and cannot enter the chamber near the venting device 8. This ensures the normal flow of the lubricating oil and balances the internal and external pressure of the housing, thereby effectively preventing the lubricating oil from overflowing.

[0035] Among them, such as Figures 1-4 As shown, the labyrinth cover 9 can be fixed to the non-motor side housing 7 by two hexagonal socket bolts 10, and the labyrinth cover 9 uses a press-fit method to save space in the housing cavity, reserving space for the arrangement of other parts.

[0036] Specifically, when a maze structure cannot be arranged on one side of the housing due to limited space, the maze structure can be arranged on the other side of the reducer housing. Then, by using a maze cover plate to cover it, the integrity and comprehensiveness of the maze structure can be well guaranteed, and the flexibility and convenience of the maze structure can be improved, without being limited by the housing structure.

[0037] Furthermore, the labyrinth structure is located at the highest point of the shell, and is divided into two cavities by an oil-blocking rib. The two cavities are arranged in a high-low manner, and each of the two cavities has a semi-open oil discharge groove at its lowest point. This structure can prevent most or all of the lubricating oil from flowing in when the reducer is running at high speed. Moreover, the lubricating oil that flows in eventually flows out of the labyrinth structure due to its own gravity, thus ensuring that the lubricating oil cannot be sprayed out from the venting device when the temperature rises and the pressure increases.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A new energy vehicle decelerator shell lubricating device, characterized in that, The utility model relates to a motorized side shell and a non-motorized side shell, and the motorized side shell is provided with an output shaft bearing hole, a forward oil blocking structure and a reverse oil blocking rib, a forward oil guiding hole and a reverse oil guiding hole, and the reverse oil blocking rib is in a U-shaped structure. When the motor rotates forward, the reducer output shaft rotates clockwise, the deep reducer cavity makes the lubricating oil move in the shell, the forward oil blocking structure can block the lubricating oil, the lubricating oil flows into the forward oil guiding hole, and then flows into the space between the output shaft and the oil seal along the structure of the hole to lubricate the port of the motorized side output shaft. When the motor rotates reversely, the reducer output shaft rotates counterclockwise, and the lubricating oil moves in the shell, the U-shaped two sides of the reverse oil blocking rib can block the lubricating oil, the lubricating oil flows into the space between the output shaft and the oil seal along the reverse oil guiding hole to lubricate the port of the motorized side shell output shaft. The utility model further relates to a non-motorized side shell provided with an air passage device and a labyrinth cover plate, the labyrinth structure of the labyrinth cover plate can divide the reducer cavity into two chambers, the labyrinth cover plate is arranged at the highest position in the shell cavity, and the lowest position of the two chambers is provided with a oil discharge groove.

2. The new energy vehicle speed reducer shell lubricating device according to claim 1, characterized in that, No matter whether the motor drives the input shaft to rotate forward or reversely, the lubricating oil can only enter the chamber at the lowest position, and cannot enter the chamber close to the air passage device, so as to ensure the normal flow of the lubricating oil and balance the internal and external pressure of the shell. The labyrinth cover plate is fixed to the non-motorized side shell by two inner hexagonal bolts. ​ 3. The new energy vehicle speed reducer shell lubricating device according to claim 2, characterized in that, ​

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