CN215751917U

CN215751917U - Rear axle reduction box

Info

Publication number: CN215751917U
Application number: CN202120795618.7U
Authority: CN
Inventors: 谭健
Original assignee: Suzhou Shuangma Electromechanical Co ltd
Current assignee: Suzhou Erma Mechnical & Electrical Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-02-08
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a rear axle reduction box which comprises a box body, a differential gear (13) rotatably arranged in the box body, a first rear axle shaft (3) and a second rear axle shaft (8) which are in transmission connection with the differential gear (13) and extend out of two ends of the box body, an intermediate gear (16) rotatably arranged in the box body and meshed with the differential gear (13), a driving gear (19) rotatably arranged in the box body and meshed with the intermediate gear (16), and a driving motor (23) arranged outside the box body, wherein the driving gear (19) is in transmission connection with the driving motor (23). The rear axle reduction box provided by the utility model has a compact structure and is convenient to produce.

Description

Rear axle reduction box

Technical Field

The utility model relates to the technical field of power equipment, in particular to a rear axle reduction gearbox.

Background

The rear axle reduction gearbox assembly on the market at present is generally manufactured by separating a rear axle and a reduction gearbox, and has a complex structure and troublesome assembly.

SUMMERY OF THE UTILITY MODEL

Based on the problems, the utility model aims to provide a rear axle reduction box which is simple in structure and convenient to produce.

In order to solve the problems in the prior art, the technical scheme provided by the utility model is as follows:

a rear axle reduction box comprises a box body, a differential gear, a first rear axle shaft, a second rear axle shaft, an intermediate gear, a driving gear and a driving motor, wherein the differential gear is rotatably arranged in the box body, the first rear axle shaft and the second rear axle shaft are in transmission connection with the differential gear and extend to the outer portions of two ends of the box body, the intermediate gear is rotatably arranged in the box body and is meshed with the differential gear, the driving gear is rotatably arranged in the box body and is meshed with the intermediate gear, the driving motor is installed outside the box body, and the driving gear is in transmission connection with the driving motor.

Furthermore, the box body comprises a left box body and a right box body which are detachably connected.

Furthermore, the first rear axle shaft is supported in the left box body through a first bearing and a second bearing, and the second rear axle shaft is supported in the right box body through a third bearing and a fourth bearing.

Further, the differential gear is supported by the left and right cases via fifth and sixth bearings.

Further, the intermediate gear is supported by the left and right cases via seventh and eighth bearings.

Further, the drive gear is supported by the left and right cases via a ninth bearing and a tenth bearing.

Further, the driving motor is mounted on the left box body, and a power output shaft of the driving motor is supported on the right box body via an eleventh bearing.

Furthermore, a first oil seal is arranged between one end, close to the first bearing, of the first rear axle shaft and the left box body, and a second oil seal is arranged between one end, close to the third bearing, of the second rear axle shaft and the right box body; a third oil seal is arranged between one end of the driving gear, which is connected with the disc brake assembly, and the box body; and a fourth oil seal is arranged between a power output shaft of the driving motor and the box body.

Furthermore, a first elastic check ring is sleeved at one end, close to the second bearing, of the first rear axle shaft, and the first elastic check ring is fixed on the inner wall of the left box body and is abutted against the second bearing; and one end of the second rear axle shaft, which is close to the fourth bearing, is sleeved with a second elastic check ring, and the second elastic check ring is fixed on the inner wall of the right box body and is abutted against the fourth bearing.

Furthermore, a vent valve and an oil drain bolt are arranged on the box body.

Compared with the prior art, the utility model has the advantages that:

the rear axle and the reduction gearbox are integrated, parts are reduced, processes such as welding and the like are omitted, the structure is simple and compact, and the production is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a rear axle reduction gearbox embodiment of the present invention;

FIG. 2 is a disassembled schematic view of an embodiment of the present invention;

wherein:

1. a left box body; 2. a right box body; 3. a first rear axle shaft; 4. a first bearing; 5. a second bearing; 6. a first oil seal; 7. a first circlip; 8. a second rear axle shaft; 9. a third bearing; 10. a fourth bearing; 11. a second oil seal; 12. a second circlip; 13. a differential gear; 14. a fifth bearing; 15. a sixth bearing; 16. an intermediate gear; 17. a seventh bearing; 18. an eighth bearing; 19. a driving gear; 20. a ninth bearing; 21. a tenth bearing; 22. a third oil seal; 23. a drive motor; 24. an eleventh bearing; 25. a fourth oil seal; 26. a disc brake assembly; 27. a vent valve; 28. an oil drain bolt; 29. and (4) bolts.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1-2, a schematic structural diagram of an embodiment of the present invention provides a rear axle reduction gearbox, which includes a box body, a differential gear 13 rotatably disposed in the box body, a first rear axle shaft 3 and a second rear axle shaft 8 which are in transmission connection with the differential gear 13 and extend to the outside of two ends of the box body, an intermediate gear 16 rotatably disposed in the box body and engaged with the differential gear 13, a driving gear 19 rotatably disposed in the box body and engaged with the intermediate gear 16, and a driving motor 23 mounted outside the box body, wherein the driving gear 19 is in transmission connection with the driving motor 23, specifically, the driving gear 19 is engaged with a power output shaft of the driving motor 23, and the driving gear 19, the intermediate gear 16 and the differential gear 13 are driven to rotate by the driving motor 23, so as to drive the first rear axle shaft 3 and the second rear axle shaft 8 to output power.

In this example, the box body comprises a left box body 1 and a right box body 2 which are detachably connected, and the left box body 1 and the right box body 2 are connected with each other through a bolt 29.

The first rear axle shaft 3 is supported in the left casing 1 via a first bearing 4 and a second bearing 5, and the second rear axle shaft 8 is supported in the right casing 2 via a third bearing 9 and a fourth bearing 10. The differential gear 13 is supported by the left case 1 and the right case 2 via a fifth bearing 14 and a sixth bearing 15. The intermediate gear 16 is supported by the left case 1 and the right case 2 via a seventh bearing 17 and an eighth bearing 18. The drive gear 19 is supported by the left casing 1 and the right casing 2 via a ninth bearing 20 and a tenth bearing 21.

A drive motor 23 is mounted on the left case 1, and a power output shaft of the drive motor 23 is supported on the right case 2 via an eleventh bearing 24.

In order to seal the whole reduction gearbox, a first oil seal 6 is arranged between one end of the first rear axle shaft 3, which is close to the first bearing 4, and the left box body 1, and a second oil seal 11 is arranged between one end of the second rear axle shaft 8, which is close to the third bearing 9, and the right box body 2; a third oil seal 22 is arranged between one end of the driving gear 19 connected with the disc brake assembly 26 and the box body; a fourth oil seal 25 is arranged between the power output shaft of the driving motor 23 and the box body.

In this example, a first elastic retainer ring 7 is sleeved at one end of the first rear axle shaft 3 close to the second bearing 5, and the first elastic retainer ring 7 is fixed on the inner wall of the left box body 1 and is abutted against the second bearing 5; one end cover that second rear axle 8 is close to fourth bearing 10 is equipped with second circlip 12, and second circlip 12 is fixed on 2 inner walls of right box and is connected with fourth bearing 10 looks butt.

In this embodiment, a vent valve 27 is provided in the housing to facilitate communication between the housing and the atmosphere during operation, to prevent excessive internal air pressure, and to allow for filling of oil. An oil drain bolt 28 is also provided on the tank body to facilitate oil drainage during maintenance.

The above examples are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rear axle reduction box is characterized in that: including the box, rotate to set up differential gear (13) in the box, with differential gear (13) transmission is connected and is extended to first rear axle (3) and second rear axle (8) outside the box both ends, rotation setting are in the box with intermediate gear (16) that differential gear (13) engaged with, rotation setting are in the box with driving gear (19) that intermediate gear (16) engaged with, and install driving motor (23) outside the box, driving gear (19) with driving motor (23) transmission is connected.

2. The rear axle reduction gearbox of claim 1, wherein: the box body comprises a left box body (1) and a right box body (2) which are detachably connected.

3. The rear axle reduction gearbox of claim 2, wherein: the first rear axle shaft (3) is supported in the left box body (1) through a first bearing (4) and a second bearing (5), and the second rear axle shaft (8) is supported in the right box body (2) through a third bearing (9) and a fourth bearing (10).

4. The rear axle reduction gearbox of claim 3, wherein: the differential gear (13) is supported by the left case (1) and the right case (2) via a fifth bearing (14) and a sixth bearing (15).

5. The rear axle reduction gearbox of claim 4, wherein: the intermediate gear (16) is supported by the left case (1) and the right case (2) via a seventh bearing (17) and an eighth bearing (18).

6. The rear axle reduction gearbox of claim 5, wherein: the drive gear (19) is supported by the left case (1) and the right case (2) via a ninth bearing (20) and a tenth bearing (21).

7. The rear axle reduction gearbox of claim 6, wherein: the driving motor (23) is installed on the left box body (1), and a power output shaft of the driving motor (23) is supported on the right box body (2) through an eleventh bearing (24).

8. The rear axle reduction gearbox of claim 7, wherein: a first oil seal (6) is arranged between one end, close to the first bearing (4), of the first rear axle shaft (3) and the left box body (1), and a second oil seal (11) is arranged between one end, close to the third bearing (9), of the second rear axle shaft (8) and the right box body (2); a third oil seal (22) is arranged between one end of the driving gear (19) connected with the disc brake assembly (26) and the box body; and a fourth oil seal (25) is arranged between a power output shaft of the driving motor (23) and the box body.

9. The rear axle reduction gearbox of claim 3, wherein: a first elastic check ring (7) is sleeved at one end, close to the second bearing (5), of the first rear axle shaft (3), and the first elastic check ring (7) is fixed on the inner wall of the left box body (1) and is abutted against the second bearing (5); and a second elastic check ring (12) is sleeved at one end, close to the fourth bearing (10), of the second rear axle shaft (8), and the second elastic check ring (12) is fixed on the inner wall of the right box body (2) and is abutted against the fourth bearing (10).

10. The rear axle reduction gearbox of claim 1, wherein: and a vent valve (27) and an oil drain bolt (28) are arranged on the box body.