CN219492975U

CN219492975U - Planetary gear differential mechanism

Info

Publication number: CN219492975U
Application number: CN202320179265.7U
Authority: CN
Inventors: 吕枫
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-08-08
Anticipated expiration: 2033-02-09

Abstract

The utility model relates to the technical field of automobile differentials, and discloses a planetary gear differential, which comprises a differential box body, wherein two groups of planetary gear assemblies and a power input shaft meshed with the two groups of planetary gear assemblies are symmetrically arranged in the differential box body, sun gears are fixedly connected to two ends of the power input shaft, and each group of planetary gear assemblies comprises three planetary gears meshed with the sun gears and a gear ring meshed with the three planetary gears. This planetary gear differential mechanism only need rotate through the outside differential gear of initiative control, just can drive differential gear and rotate, and then can drive the ring gear of both sides through differential gear and carry out the rotation of opposite direction to can drive the planetary gear of both sides and carry out the rotation of different speeds, and then can output different rotational speeds to respective drive wheel through the cooperation between planet carrier assembly and the power take off shaft, thereby realize the differential of left and right sides drive wheel.

Description

Planetary gear differential mechanism

Technical Field

The utility model relates to the technical field of automobile differentials, in particular to a planetary gear differential mechanism.

Background

The automobile differential mechanism can realize a mechanism for rotating left and right driving wheels at different rotation speeds, and has the function of enabling the left and right driving wheels to roll at different rotation speeds when an automobile turns to run or runs on uneven roads, namely ensuring that the driving wheels at two sides do pure rolling movement. The differential is provided for adjusting the rotational speed difference between the left and right wheels. In four-wheel drive, in order to drive four wheels, all the wheels must be connected, if the four wheels are mechanically connected together, the automobile can not rotate at the same speed when in curve running, and in order to enable the rotation speed of the automobile in curve running to be basically consistent, a middle differential is needed to be added to adjust the rotation speed difference of the left wheel and the right wheel;

however, when the differential mechanism for the existing automobile is required to actively control the rotation speed difference of the driving wheels at the left side and the right side, a series of operations are required to be performed from the inside of the differential mechanism, so that the rotation speed difference of the driving wheels at the left side and the right side can be actively controlled, and the inside of the differential mechanism needs to be greatly changed in the adjustment process, so that the internal structure of the differential mechanism is more complex, and the differential mechanism is not convenient and efficient to use.

Disclosure of Invention

The present utility model is directed to a planetary gear differential mechanism, which solves the above-mentioned problems.

The embodiment of the application adopts the following technical scheme:

the utility model provides a planetary gear differential mechanism, includes the differential box, the inside symmetry of differential box is provided with two sets of planetary gear assembly and the power input shaft that is connected with two sets of planetary gear assembly meshing, the equal fixedly connected with sun gear in both ends of power input shaft, every group planetary gear assembly include three planetary gear that is connected with the sun gear meshing and with three planetary gear engaged with ring gear, one side fixedly connected with of planetary gear is used for exporting the planet carrier assembly of power, two sets of meshing has differential gear between the ring gear in the planetary gear assembly, differential gear is connected with the outside differential gear that is located the differential box outside.

The beneficial effects are that:

according to the utility model, the differential gear can be driven to rotate only by actively controlling the rotation of the external differential gear, and then the gear rings at the two sides can be driven to rotate in opposite directions through the differential gear, so that the planetary gears at the two sides can be driven to rotate at different speeds, and further different rotation speeds can be output to respective driving wheels through the cooperation between the planetary carrier assembly and the power output shaft, so that the differential speed of the driving wheels at the left side and the right side is realized, and the use is more convenient and quick.

Preferably, the power input shaft is connected with a first bevel gear in a key manner, the first bevel gear is meshed with a second bevel gear, the second bevel gear is arranged on a rotating shaft, one end of the rotating shaft extends out of the differential box, and one end of the rotating shaft extending out of the differential box is connected with a driving motor fixed on the differential box.

Preferably, the planet carrier assembly is respectively connected with the middle parts of the three planet gears in a rotating way through connecting shafts, and a power output shaft for outputting power is fixedly connected with the middle part of one side of the planet carrier assembly.

Preferably, the differential gear is connected with two ring gears in a meshed manner, a transmission shaft is fixedly connected to the middle part of one side of the differential gear, one end of the transmission shaft is fixedly connected with an external differential gear, and the rotation speed difference of the driving wheels on the left side and the right side can be controlled from the outside rapidly through cooperation among the differential gear, the transmission shaft and the external differential gear.

Preferably, the inner side wall of the gear ring is provided with a plurality of first teeth meshed with the planetary gears along the circumferential direction of the gear ring, the opposite side surfaces of the two gear rings are inclined surfaces, and the inclined surfaces of the gear ring are provided with a plurality of second teeth meshed with the differential gears.

Preferably, the output end of the power output shaft penetrates through the inner wall of the differential box body and extends to the outside of the differential box body, and the rotating speed generated by the planetary wheel assembly can be provided to the driving wheel through the power output shaft.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a right side schematic view of the planetary gear set of the present utility model;

FIG. 3 is a schematic left-hand structural view of the planetary gear set of the present utility model.

In the figure: 1. a differential case; 2. a gear ring; 3. a planetary gear; 4. a sun gear; 5. a planet carrier assembly; 6. a power output shaft; 7. a power input shaft; 8. a first bevel gear; 9. a second bevel gear; 10. a rotating shaft; 11. a driving motor; 12. a differential gear; 13. a transmission shaft; 14. an outer differential wheel.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

Referring to FIGS. 1-3, a planetary gear differential; comprises a differential box body 1, two groups of planetary gear assemblies and a power input shaft 7 which is meshed with the two groups of planetary gear assemblies are symmetrically arranged in the differential box body 1, the two ends of the power input shaft 7 are fixedly connected with a sun gear 4, each group of planetary gear assemblies comprises three planetary gears 3 which are meshed with the sun gear 4 and a gear ring 2 which is meshed with the three planetary gears 3, one side of each planetary gear 3 is fixedly connected with a planet carrier assembly 5 which is used for outputting power, a differential gear 12 is meshed between the gear rings 2 in the two groups of planetary gear assemblies, the differential gear 12 is connected with an external differential gear 14 which is positioned outside the differential box body 1, a first bevel gear 8 is connected on the power input shaft 7 in a key way, a second bevel gear 9 is meshed with the first bevel gear 8, the second bevel gear 9 is arranged on a rotating shaft 10 of which one end extends out of the differential box 1, one end of a rotating shaft 10 extending out of the differential case 1 is connected with a driving motor 11 fixed on the differential case 1, a planet carrier assembly 5 is respectively and rotatably connected with the middle parts of three planet gears 3 through connecting shafts, a power output shaft 6 for outputting power is fixedly connected with the middle part of one side of the planet carrier assembly 5, a differential gear 12 is in meshed connection with two gear rings 2, a transmission shaft 13 is fixedly connected with the middle part of one side of the differential gear 12, one end of the transmission shaft 13 is fixedly connected with an external differential gear 14, the inner side wall of the gear ring 2 is circumferentially provided with a plurality of first teeth meshed with the planet gears 3, the opposite side surfaces of the two gear rings 2 are inclined surfaces, the inclined surfaces of the gear rings 2 are provided with a plurality of second teeth meshed with the differential gear 12, the output end of the power output shaft 6 penetrates through the inner wall of the differential case 1 and extends to the outer part, and the power output shaft 6, bearings are arranged at the joints of the rotating shaft 10 and the transmission shaft 13 and the differential case 1, and are used for ensuring the normal rotation of the output shaft 6, the rotating shaft 10 and the transmission shaft 13 and avoiding abrasion to the differential case 1;

the driving motor 11 is electrically connected with an external power supply, when the driving motor 11 is started, power can be provided for the whole device, normal operation of the device is guaranteed, the external differential wheel 14 is fixedly connected with the output end of the external motor, the output end of the external motor is provided with a band-type brake, the band-type brake is in the prior art, the external motor and the band-type brake are both in communication connection with an external controller, when the rotation speed difference of the left side and the right side of a vehicle needs to be actively controlled, the left differential speed and the right differential speed of the vehicle can be actively regulated only by controlling the external motor to drive the left side and the right side of the vehicle to turn left or right, when the same differential speed of the wheels on the left side and the right side needs to be kept, the band-type brake can be controlled by the external controller to lock the external motor, so that the gear ring 2 is kept motionless, and when the free differential speed of the wheels on the left side and the right side needs to be in a brake releasing state, the external motor is in a non-energized state, and the wheels on the left side and the right side can be freely differential;

when the external differential gear 14 is in a free state, the driving motor 11 is started to drive the rotating shaft 10 and the second bevel gear 9 to rotate, so that the first bevel gear 8 and the power input shaft 7 can be driven to rotate, when the power input shaft 7 rotates, the sun gears 4 at two ends can be simultaneously driven to rotate, so that the planetary gears 3 at two ends can be simultaneously driven to rotate and rotate around the sun gears 4, when the planetary gears 3 rotate, the planetary carrier assembly 5 and the power output shaft 6 can be driven to rotate, so that power can be transmitted to driving wheels at two sides of a vehicle through the power output shaft 6, and at the moment, the driving wheels at two sides of the vehicle can be freely differentiated;

when the external differential gear 14 is in a locking state, the gear ring 2 is also in the locking state through the cooperation of the transmission shaft 13 and the differential gear 12, and at the moment, the planetary gears 3 on the left side and the right side can rotate around the sun gear 4 under the drive of the sun gear 4, so that the planet carrier assembly 5 can be driven to rotate, and further, the power can be transmitted to the driving wheels on the two sides of the vehicle through the power output shaft 6, and at the moment, the two sides of the vehicle cannot be differentiated and only can keep the same rotation speed;

when the rotation speed of the external differential gear 14 is actively controlled, the differential gear 12 can be driven to rotate through the transmission shaft 13, and the gear ring 2 can be further driven to rotate, so that the rotation speed difference at two sides of the vehicle is actively controlled.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. The utility model provides a planetary gear differential mechanism, includes the differential box, its characterized in that, the inside symmetry of differential box is provided with two sets of planetary gear assemblies and with two sets of planetary gear assembly meshing connection's power input shaft, the equal fixedly connected with sun gear in both ends of power input shaft, every group planetary gear assembly include three planetary gear that is connected with the sun gear meshing and with three planetary gear engaged with the ring gear, one side fixedly connected with of planetary gear is used for exporting the planet carrier assembly of power, two sets of meshing has differential gear between the ring gear in the planetary gear assembly, differential gear is connected with the outside differential wheel that is located the differential box outside.

2. The planetary gear differential according to claim 1, wherein the power input shaft is keyed with a first bevel gear engaged with a second bevel gear mounted on a rotating shaft having one end extending out of the differential case, and a driving motor fixed to the differential case is connected to one end of the rotating shaft extending out of the differential case.

3. The planetary gear differential according to claim 1, wherein the planet carrier assembly is rotatably connected to the middle parts of the three planetary gears through connecting shafts, respectively, and a power output shaft for outputting power is fixedly connected to the middle part of one side of the planet carrier assembly.

4. The planetary gear differential according to claim 1, wherein the differential gear is engaged with the two ring gears, a transmission shaft is fixedly connected to a middle portion of one side of the differential gear, and an external differential gear is fixedly connected to one end of the transmission shaft.

5. The planetary gear differential according to claim 1, wherein the inner side wall of the ring gear is provided with a plurality of first teeth engaging with the planetary gear along the circumferential direction thereof, two of the opposite sides of the ring gear are inclined surfaces, and the inclined surfaces of the ring gear are provided with a plurality of second teeth engaging with the differential gear.

6. A planetary gear differential as claimed in claim 3 wherein the output end of the power take-off shaft extends through the inner wall of the differential housing and to the exterior thereof.