CN215370844U

CN215370844U - Differential gear box

Info

Publication number: CN215370844U
Application number: CN202120138409.5U
Authority: CN
Inventors: 褚红卫
Original assignee: Linghai Hai Shi Da Machinery Co ltd
Current assignee: Haishida Emergency Equipment Zhejiang Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-12-31
Anticipated expiration: 2031-01-19

Abstract

The utility model relates to the technical field of vehicles, in particular to a differential gear box. This differential gear case, including box X, install transmission group, differential mechanism in this box X, transmission group includes left output shaft and right output shaft, this differential mechanism include with left output shaft connected's gear wheel, with right output shaft and with gear wheel terminal surface connect fixed casing, hold the gear shaft of evenly arranging to circumference in this casing more, one of them of each team's gear shaft with be fixed in left gear engagement on the left output shaft, another with be fixed in right gear engagement on the right output shaft makes left output shaft right output shaft can realize different rotational speeds. The differential gear box has the advantages of simple structure, small volume, convenient assembly and installation and stable transmission, and is suitable for all-terrain vehicles with various specifications (such as 4-wheel all-terrain vehicles, 6-wheel all-terrain vehicles and 8-wheel all-terrain vehicles).

Description

Differential gear box

Technical Field

The utility model relates to the technical field of vehicles, in particular to a differential gear box.

Background

The differential mechanism is mainly applied to an automobile transmission system, the common differential mechanism comprises a planetary gear, a planetary gear carrier (shell), a half axle gear and other parts, the power of an engine enters the differential mechanism through a transmission shaft to directly drive the planetary gear carrier, and then the planetary gear carrier drives a left half axle and a right half axle to respectively drive a left wheel and a right wheel.

Referring to fig. 1, chinese utility model patent No. CN204213297U discloses a differential of all-terrain vehicle drive axle, which comprises: a differential housing; the driven bevel gear is assembled with the differential shell to form an installation chamber; the two half shaft gears are accommodated in the mounting chamber and are respectively sleeved in the first half shaft gear hole and the second half shaft gear hole; the cross shaft assembly is positioned between the two half shaft gears, and four shaft ends of the cross shaft assembly are fixed on the differential case; and the four planetary gears are respectively sleeved on the four shafts of the cross shaft assembly and are meshed with the two half shaft gears. The utility model discloses a among the differential mechanism of the all-terrain vehicle transaxle that provides, design according to the dimensional requirement of all-terrain vehicle, realized the differential function of all-terrain vehicle transaxle through the structure that two half shaft gears, cross axle subassembly and four planetary gear are constituteed, satisfy the regulation that new clause has the differential function to all-terrain vehicle. The application also discloses an all-terrain vehicle drive axle comprising the differential.

The existing differential mechanism is complex in structure, high in preparation precision requirement and inconvenient to assemble and install.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a differential gear box with a novel structure, which has the advantages of simple structure, convenience in assembly and installation and stable transmission.

In order to achieve the advantages, the differential gear box provided by the utility model comprises a box body X and a transmission set arranged in the box body X, wherein the transmission set comprises a left output shaft and a right output shaft, the differential gear box also comprises a differential mechanism, the differential mechanism comprises a large gear connected with the left output shaft, a shell connected and fixed with the right output shaft and the end surface of the large gear, and a plurality of pairs of gear shafts uniformly arranged in the circumferential direction and accommodated in the shell, one of the gear shafts in each team is meshed with a left gear fixed on the left output shaft, and the other gear shaft is meshed with a right gear fixed on the right output shaft, so that the left output shaft and the right output shaft can realize different rotating speeds.

In one embodiment of the differential case of the present invention, both ends of the gear shaft are rotatably connected to the large gear and the housing, respectively.

In one embodiment of the differential case of the present invention, the central axes of the large gear, the housing, the left output shaft, and the right output shaft are located on the same straight line.

In one embodiment of the differential case of the present invention, the number of the gear shafts is three pairs, each of which is arranged around the central axis of the housing.

In one embodiment of the differential case of the present invention, the left output shaft is rotatably connected to the large gear, and the right output shaft is rotatably connected to the housing.

In one embodiment of the differential case of the present invention, a reduction mechanism for reducing the rotational speed of the left output shaft and the right output shaft is fixed to the case X.

In one embodiment of the differential gear box of the present invention, the speed reducing mechanism comprises brake discs fixed on the left output shaft and the right output shaft respectively, and brake calipers located at the edges of the brake discs, and the rotation speed of the left output shaft and/or the right output shaft is reduced by the friction braking of the brake calipers and the brake discs in cooperation.

In an embodiment of the differential gear box of the present invention, the transmission set further includes a transmission shaft i, a transmission shaft ii, a transmission shaft iii, a first transmission tooth fixed on the transmission shaft i, a second transmission tooth fixed on the transmission shaft ii, and a third transmission tooth fixed on the transmission shaft iii, the transmission shaft i is connected to the engine, the first transmission tooth is engaged with the second transmission tooth, the second transmission tooth is engaged with the third transmission tooth, and the transmission shaft iii is connected to the propeller.

In one embodiment of the differential gear box of the present invention, the transmission shaft ii further has a fourth transmission gear fixed thereto, and the fourth transmission gear is engaged with the large gear.

In one embodiment of the differential gear box of the present invention, the central axes of the transmission shaft i and the transmission shaft iii are located on the same straight line, and the central axis of the transmission shaft ii is perpendicular to the central axes of the transmission shaft i and the transmission shaft iii and is parallel to the central axes of the left output shaft and the right output shaft.

The differential gear box has the advantages of simple structure, small volume, convenient assembly and installation and stable transmission, and is suitable for all-terrain vehicles with various specifications (such as 4-wheel all-terrain vehicles, 6-wheel all-terrain vehicles and 8-wheel all-terrain vehicles).

In the utility model, the transmission shaft III of the differential gear box is connected with a propeller which is used for assisting or powering advancing on water, so that the vehicle has better power in water.

Drawings

Fig. 1 is a schematic structural diagram of a differential of a conventional all-terrain vehicle drive axle.

Fig. 2 is a schematic structural view of the differential case of the first embodiment of the present invention.

Fig. 3 is a schematic view of the other side of the differential case of fig. 2.

Fig. 4 is a schematic view of the internal structure of the differential case of fig. 2.

Fig. 5 is a schematic structural view of a differential mechanism of the differential case of fig. 2.

Fig. 6 is an exploded view of the differential mechanism of fig. 5.

Fig. 7 is a schematic view showing the meshing state of the gear shaft of the differential mechanism of fig. 6 with the left and right gears.

FIG. 8 is a schematic view of the connection of the differential housing of FIG. 2 to a drive gear box.

Fig. 9 is an exploded view of the drive gearbox of fig. 8.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 2 to 7, the differential gear box according to the first embodiment of the present invention includes a box body X and a transmission set 300 installed in the box body X, the transmission set 300 includes a left output shaft 301 and a right output shaft 302, the differential gear box further includes a differential mechanism 400, the differential mechanism 400 includes a large gear 401 connected with the left output shaft 301, a housing 402 connected with the right output shaft 302 and fixedly connected with an end surface of the large gear 401, and a plurality of pairs of gear shafts 403 uniformly arranged in a circumferential direction and accommodated in the housing 402, one of the gear shafts 403 in each pair is meshed with a left gear 303 fixed on the left output shaft 301, and the other is meshed with a right gear 304 fixed on the right output shaft 302, so that the left output shaft 301 and the right output shaft 302 can realize different rotation speeds.

Two ends of the gear shaft 403 are rotatably connected with the large gear 401 and the housing 402, respectively. The central axes of the bull gear 401, the housing 402, the left output shaft 301 and the right output shaft 302 are located on the same straight line. The left output shaft 301 is rotatably connected to the large gear 401, and the right output shaft 302 is rotatably connected to the housing 402.

Preferably, the number of the gear shafts 403 is three, and each is arranged around the central axis of the housing 402.

The box body X is formed by splicing a plurality of plate bodies. A reduction mechanism 500 for reducing the rotation speed of the left output shaft 301 and the right output shaft 302 is fixed to the case X. The speed reducing mechanism 500 comprises a brake disc 501 fixed on the left output shaft 301 and the right output shaft 302 respectively and a brake caliper 502 located at the edge of the brake disc 501, and the rotation speed of the left output shaft 301 and/or the right output shaft 302 is reduced by the friction braking of the brake caliper 502 and the brake disc 501.

The transmission group 300 further comprises a transmission shaft I, a transmission shaft II, a transmission shaft III, a first transmission gear 305 fixed on the transmission shaft I, a second transmission gear 306 fixed on the transmission shaft II, a third transmission gear 307 fixed on the transmission shaft III, the transmission shaft I is connected with an engine, the first transmission gear 305 is meshed with the second transmission gear 306, the second transmission gear 306 is meshed with the third transmission gear 307, the transmission shaft III is connected with a propeller 600, and the propeller 600 is used for assisting or driving water to advance.

The transmission shaft II is also fixedly provided with a fourth transmission gear 308, and the fourth transmission gear 308 is meshed with the large gear 401. The central axes of the transmission shaft I and the transmission shaft III are positioned on the same straight line. The transmission shaft II is located below the left output shaft 301 and the right output shaft 302, and the central axis of the transmission shaft II is perpendicular to the central axes of the transmission shaft I and the transmission shaft III and is parallel to the central axes of the left output shaft 301 and the right output shaft 302.

When the differential gear box is used: the engine drives the transmission shaft I, and drives the transmission shaft II through the first transmission gear 305 and the second transmission gear 306 so as to drive the transmission shaft III and the large gear 401 to rotate;

the large gear 401 is fixedly connected with the shell 402, so that the gear shaft 403 is driven to move circumferentially, and the gear shaft 403 drives the left output shaft 301 and the right output shaft 302 to rotate through the gear shaft 403 under the state that the gear shaft 403 is not self-rotating;

when the left output shaft 301 needs to change speed (for example, in the case of turning a vehicle), the left brake caliper 502 brakes the brake disc 501 on the same side to reduce the rotation speed of the left output shaft 301, at this time, the rotation speed of the left output shaft 301 is different from the rotation speed output by the engine, the balance is realized by the rotation of the gear shaft 403 meshed with the left gear 303, and the rotation speed of the right output shaft 302 is not affected. The same applies when the right output shaft 302 needs to be shifted.

In one embodiment of the present embodiment, the differential gear box is connected to a driving gear box, and the driving gear box includes a box S, an input shaft 200 installed in the box S, a transmission shaft set, and an output shaft set.

Referring to fig. 8-9, the transmission shaft set includes a first transmission shaft 210 and a second transmission shaft 211, the output shaft set includes a first output shaft 220 and a second output shaft 221, the input shaft 200, the first transmission shaft 210 and the second transmission shaft 211 are arranged in parallel, the central axes of the first output shaft 220 and the second output shaft 221 are located on the same straight line, and the central axes of the first output shaft 220 and the second output shaft 221 are respectively perpendicular to the central axis of the second transmission shaft 211.

The transmission shaft set further includes a gear C1 fixed on the input shaft 200, a gear C2 fixed on the first transmission shaft 210, a gear C3 fixed on the first transmission shaft 210, a gear C4 fixed on the second transmission shaft 211, a gear C5 fixed on the second transmission shaft 211, a gear C6 fixed on the first output shaft 220, and a gear C7 fixed on the second output shaft 221. The gear C1 is meshed with the gear C2, the gear C3 is meshed with the gear C4, and the gear C5 is meshed with the gear C6 and the gear C7 respectively.

Preferably, the gear C1 and the gear C2 are both spur gears. The gear C3 and the gear C4 are both helical gears. The gear C5, the gear C6 and the gear C7 are all bevel gears. More preferably, gear C1 is a small spur gear and gear C2 is a large spur gear C2. Gear C3 is a bevel pinion and gear C4 is a bevel pinion. The gear C5 is sleeved outside the second output shaft 221, the gear C5 comprises a tooth portion C51 and a shaft portion C52, the gear C4 is sleeved outside the shaft portion C52, the shaft portion C52 is provided with a clamp spring groove C522 for mounting the clamp spring C521, and the clamp spring C521 is matched with the clamp spring groove C522 to limit axial movement of the gear C4.

The gear C4 and the gear C5 as well as the gear C5 and the second output shaft 221 are all fixed in circumferential connection. During operation, left output shaft 301 or right output shaft 302 drives input shaft 200 and rotates, drives first transmission shaft 210 through engaged gear C1, gear C2 and rotates, thereby first transmission shaft 210 drives gear C5 through engaged gear C3, gear C4 and drives gear C6, gear C7 rotation respectively, gear C6 drives first output shaft 220 and rotates, and gear C7 drives second output shaft 221 and rotates.

The left output shaft 301 or the right output shaft 302 is connected with the input shaft 200 through a chain wheel and a chain to realize transmission.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

Claims

1. The utility model provides a differential gear box, includes box X and installs the transmission group in this box X, its characterized in that, the transmission group is including left output shaft and right output shaft, differential gear box still includes differential mechanism, this differential mechanism include with left output shaft's gear wheel, with right output shaft and with gear wheel terminal surface connect fixed casing, hold the gear shaft of evenly arranging to circumference in this casing many, one of them of each team's gear shaft with be fixed in left gear engagement on the left output shaft, another with be fixed in right gear engagement on the right output shaft makes left output shaft right output shaft can realize different rotational speeds.

2. The differential case of claim 1, wherein both ends of the gear shaft are rotatably connected to the large gear and the housing, respectively.

3. The differential housing of claim 1 wherein the central axes of the bull gear, the housing, the left output shaft, and the right output shaft are located on a common line.

4. The differential housing of claim 3 wherein the number of gear shafts is three pairs, each disposed about the central axis of the housing.

5. The differential housing of claim 1 wherein the left output shaft is rotationally coupled to the bull gear and the right output shaft is rotationally coupled to the housing.

6. The differential case according to claim 1, wherein reduction mechanisms for reducing the rotational speeds of the left output shaft and the right output shaft are fixed to the case X, respectively.

7. The differential case according to claim 6, wherein the speed reducing mechanism comprises brake disks fixed to the left output shaft and the right output shaft, respectively, and brake calipers located at edges of the brake disks, and friction braking is performed by the brake calipers in cooperation with the brake disks to reduce the rotation speed of the left output shaft and/or the right output shaft.

8. The differential gear box according to claim 1, wherein the transmission set further comprises a transmission shaft I, a transmission shaft II, a transmission shaft III, a first transmission tooth fixed on the transmission shaft I, a second transmission tooth fixed on the transmission shaft II, and a third transmission tooth fixed on the transmission shaft III, the transmission shaft I is connected with an engine, the first transmission tooth is meshed with the second transmission tooth, the second transmission tooth is meshed with the third transmission tooth, and the transmission shaft III is connected with a propeller.

9. The differential case as defined in claim 8, wherein said second transmission shaft is further fixed with a fourth transmission tooth, and said fourth transmission tooth is engaged with said large gear.

10. The differential gear box according to claim 8 or 9, wherein the central axes of the transmission shafts i and iii are located on the same straight line, and the central axis of the transmission shaft ii is perpendicular to the central axes of the transmission shafts i and iii and parallel to the central axes of the left and right output shafts.