CN210062672U - Electric automobile rear axle main reducer - Google Patents
Electric automobile rear axle main reducer Download PDFInfo
- Publication number
- CN210062672U CN210062672U CN201920398317.3U CN201920398317U CN210062672U CN 210062672 U CN210062672 U CN 210062672U CN 201920398317 U CN201920398317 U CN 201920398317U CN 210062672 U CN210062672 U CN 210062672U
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- transmission shaft
- fixed
- end cover
- bearing
- rear axle
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Abstract
The utility model discloses an electric automobile rear axle main reducer, which comprises a reducer shell, wherein a first transmission shaft and a second transmission shaft which are parallel up and down penetrate through the reducer shell, the first transmission shaft is fixed through a pair of first bearings, the first bearing at the outer side is fixed by an end cover, and the inner side of the end cover is provided with a first lug; two ends of the second transmission shaft are fixed through tapered roller bearings, bearing seats are arranged on the outer sides of the tapered roller bearings, second convex blocks are arranged on the inner sides of the bearing seats, and top shoulders are formed on the inner side surfaces of the second convex blocks; o-shaped rings are sleeved on the first lug and the second lug for sealing. The utility model discloses to first transmission shaft, secondary drive axle axial effective fixation, improve the stationarity of reduction gear operation, eliminate the abnormal sound, increase the life of first transmission shaft, secondary drive axle, prolong the life of reduction gear body simultaneously.
Description
Technical Field
The utility model relates to an electric automobile accessory technical field especially relates to an electric automobile rear axle main reducer.
Background
At present, with the strong promotion of the national new energy policy, all large host plants are beginning to manufacture and produce electric automobiles, and the reliability and the comfort of the electric automobiles are directly influenced by the main speed reducer as a key component of a rear drive axle. In order to reduce the assembly difficulty of the main speed reducer and the processing difficulty of a shell of the speed reducer, a bearing hole is processed into a through hole on the shell and is fixed by using a ball bearing and a clamp spring, but along with the increase of the torque of a motor and the gear ratio, the middle shaft bearing is easy to cause fatigue damage to cause early failure, and when the clamp spring is used for fixing, axial float is easy to occur, so that the gear meshing area is changed when the rear axle is accelerated and decelerated, abnormal sound can be caused, and the driving comfort of the electric automobile is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric automobile rear axle main reducer is to first transmission shaft, secondary drive axle axial effective fixation, improves the stationarity of reduction gear operation, eliminates the abnormal sound, increases the life of first transmission shaft, secondary drive axle, prolongs the life of reduction gear body simultaneously.
The utility model provides a technical scheme that its technical problem adopted is: a rear axle main reducer of an electric automobile comprises a reducer shell, wherein a first transmission shaft and a second transmission shaft which are parallel up and down penetrate through the reducer shell, the first transmission shaft is fixed through a pair of first bearings, the first bearing positioned on the outer side is fixed through an end cover, a first bump is arranged on the inner side of the end cover, one end of the first transmission shaft extends out of the reducer shell and is connected with a motor, and the motor is fixed outside the reducer shell through a motor connecting disc; two ends of the second transmission shaft are fixed through tapered roller bearings, bearing seats are arranged on the outer sides of the tapered roller bearings, second convex blocks are arranged on the inner sides of the bearing seats, and top shoulders are formed on the inner side surfaces of the second convex blocks; o-shaped rings are sleeved on the first protruding block and the second protruding block for sealing.
Preferably, the first bump on the inner side of the end cover is pressed against the outer side of the first bearing; the circumference of the end cover is provided with a first through hole, the end cover penetrates through the first through hole through a bolt and is fixed on the speed reducer shell, and a gasket is placed on the first convex block.
Preferably, the top shoulder of the inner side surface of the second bump on the inner side of the bearing seat is pressed against the outer side of the tapered roller bearing; the circumference of the bearing seat is provided with second through holes, the bearing seat penetrates through the second through holes through bolts to be fixed on the speed reducer shell, and the second convex blocks are provided with gaskets.
Preferably, the end cover and the bearing seat are made of aluminum alloy materials.
Preferably, one end of the first transmission shaft extends out of the speed reducer shell and is connected with a motor, the motor is fixed outside the speed reducer shell through a motor connecting disc, and the motor connecting disc is fixed on the speed reducer shell through a bolt.
The utility model has the advantages that: 1. the device adopts the end cover to fix one end of the first transmission shaft, and the first bearing is tightly pressed by the first bump, so that the fixing effect is strong, the axial movement of the first transmission shaft can be eliminated, and the running stability of the speed reducer is improved; 2. the outer side of the tapered roller bearing is fixed by adopting the bearing seat in a press-fitting manner, the fixing effect of the bearing seat is enhanced, the service life is long, the axial movement of the second transmission shaft can be effectively eliminated, the fatigue damage of the second transmission shaft caused by the increase of the torque of the motor and the gear ratio is avoided, and the service life of the second transmission shaft is seriously influenced; 3. after the axial play of the first transmission shaft and the second transmission shaft is eliminated, abnormal sound generated by the change of a meshing area in the process of acceleration and deceleration of a rear axle main reducer gear of the electric vehicle can be avoided, and the use comfort is improved; 4. use O type circle to carry out effectual sealed, increase sealing strength, 5, motor connecting disc can carry out free switching according to the motor interface of difference, need reopen main reducer casing mould when having avoided the motor to change to reduce development cost.
Drawings
Fig. 1 is the utility model relates to an electric automobile rear axle final drive's main view section view schematic diagram.
Fig. 2 is a schematic structural diagram of the middle end cap of the present invention.
Fig. 3 is a schematic structural diagram of the middle bearing seat of the present invention.
Fig. 4 is an enlarged view of a in fig. 1.
In the figure: 1. the reducer comprises a reducer shell, 2, a first transmission shaft, 3, a first bearing, 4, an end cover, 41, a first through hole, 42, a first lug, 5, a tapered roller bearing, 6, a bearing seat, 61, a second through hole, 62, a second lug, 63, a top shoulder, 7, an O-shaped ring, 8, a gasket, 9, a second transmission shaft, 11 and a motor connecting disc.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention based on the embodiments of the present invention.
Examples
A main speed reducer of a rear axle of an electric automobile comprises a speed reducer shell 1, wherein a first transmission shaft 2 and a second transmission shaft 9 which are parallel up and down penetrate through the speed reducer shell 1, the first transmission shaft 2 is fixed through a pair of first bearings 3, the first bearings 3 which are positioned on the outer side are fixed through an end cover 4, a first bump 42 is arranged on the inner side of the end cover 4, and the first bump 42 is pressed on the outer side of the first bearings 3; a first through hole 41 is formed in the circumference, close to the edge, of the end cover 4, the end cover 4 penetrates through the first through hole 41 through a bolt and is fixed on the speed reducer shell 1, a gasket 8 is placed on a first bump 42, the end cover 4 can eliminate axial play of the first transmission shaft 2 and improve the running stability of the speed reducer, one end of the first transmission shaft 2 extends out of the speed reducer shell 1 and is connected with a motor, and the motor is fixed outside the speed reducer shell 1 through a motor connecting disc 11;
two ends of the second transmission shaft 9 are fixed through tapered roller bearings 5, bearing seats 6 are arranged on the outer sides of the tapered roller bearings 5, second convex blocks 62 are arranged on the inner sides of the bearing seats 6, and top shoulders 63 are formed on the inner side surfaces of the second convex blocks 62; the top shoulder 63 on the inner side of the second bump 62 is pressed against the outer side of the tapered roller bearing 5; a second through hole 61 is formed in the circumference, close to the edge, of the bearing seat 6, the bearing seat 6 penetrates through the second through hole 61 through a bolt and is fixed on the speed reducer shell 1, a gasket 8 is arranged on a second bump 62, and the outer side of the tapered roller bearing 5 is fixed through press mounting of the bearing seat 6, so that axial movement of the second transmission shaft 9 can be effectively eliminated, fatigue damage to the second transmission shaft 9 caused by increase of motor torque and gear ratio is avoided, and the service life of the second transmission shaft 9 is seriously influenced;
after the axial play of the first transmission shaft 2 and the second transmission shaft 9 is eliminated, abnormal sound generated by the change of a meshing area in the process of acceleration and deceleration of a rear axle main reducer gear of the electric vehicle can be avoided, and the use comfort of the whole vehicle is improved.
The O-shaped rings 7 are sleeved on the first lug 42 and the second lug 62 for sealing.
The end cover 4 and the bearing seat 6 are made of aluminum alloy materials, and therefore the light weight requirement is met.
Wherein, the one end of first transmission shaft 2 stretches out outside reduction gear housing 1 and is connected with the motor, and the motor is fixed in outside reduction gear housing 1 through motor coupling disc 11, and motor coupling disc 11 passes through the bolt fastening on reduction gear housing 1, can carry out free switching according to the motor interface of difference, need reopen main reducer housing mould when having avoided the motor to change to reduce development cost.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent characters or structure changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the same way in the protection scope of the present invention.
Claims (5)
1. The utility model provides an electric automobile rear axle final drive, includes the reduction gear casing, run through first transmission shaft, the second transmission shaft that has upper and lower parallel in the reduction gear casing, its characterized in that: the first transmission shaft is fixed through a pair of first bearings, wherein the first bearing positioned on the outer side is fixed through an end cover, a first bump is arranged on the inner side of the end cover, one end of the first transmission shaft extends out of the speed reducer shell and is connected with a motor, and the motor is fixed outside the speed reducer shell through a motor connecting disc; two ends of the second transmission shaft are fixed through tapered roller bearings, bearing seats are arranged on the outer sides of the tapered roller bearings, second convex blocks are arranged on the inner sides of the bearing seats, and top shoulders are formed on the inner side surfaces of the second convex blocks; o-shaped rings are sleeved on the first protruding block and the second protruding block for sealing.
2. The electric automobile rear axle final drive of claim 1, characterized in that: the first convex block on the inner side of the end cover is pressed against the outer side of the first bearing; the circumference of the end cover is provided with a first through hole, the end cover penetrates through the first through hole through a bolt and is fixed on the speed reducer shell, and a gasket is placed on the first convex block.
3. The electric automobile rear axle final drive of claim 1, characterized in that: the top shoulder of the inner side surface of the second bump on the inner side of the bearing seat is pressed against the outer side of the tapered roller bearing; the circumference of the bearing seat is provided with second through holes, the bearing seat penetrates through the second through holes through bolts to be fixed on the speed reducer shell, and the second convex blocks are provided with gaskets.
4. The electric automobile rear axle final drive of claim 1, characterized in that: the end cover and the bearing seat are made of aluminum alloy materials.
5. The electric automobile rear axle final drive of claim 1, characterized in that: the motor connecting disc is fixed on the reducer shell through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920398317.3U CN210062672U (en) | 2019-03-27 | 2019-03-27 | Electric automobile rear axle main reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920398317.3U CN210062672U (en) | 2019-03-27 | 2019-03-27 | Electric automobile rear axle main reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210062672U true CN210062672U (en) | 2020-02-14 |
Family
ID=69434673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920398317.3U Active CN210062672U (en) | 2019-03-27 | 2019-03-27 | Electric automobile rear axle main reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210062672U (en) |
-
2019
- 2019-03-27 CN CN201920398317.3U patent/CN210062672U/en active Active
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