CN221819814U - Impact-resistant electric drive bridge assembly - Google Patents

Abstract

The utility model relates to an impact-resistant electric drive axle assembly, which comprises a drive assembly, wherein the drive assembly comprises a secondary driven gear, the secondary driven gear comprises a gear sleeve and a gear disc, the gear sleeve is rotatably sleeved on a supporting part, and the gear disc is correspondingly arranged with a differential shell; the differential mechanism comprises a differential shell, a first half shaft gear, a second half shaft gear and two planetary gears, wherein the differential shell is rotatably connected to the axle shell, the first half shaft gear is arranged on the first half shaft, the second half shaft gear is arranged on the second half shaft, and a supporting part is formed by extending one end of the differential shell; the movable clutch comprises a fixed combining sleeve, a movable combining sleeve and an elastic piece, wherein the fixed combining sleeve is connected with the differential shell, the movable combining sleeve is axially and movably sleeved on the gear sleeve and synchronously rotates with the gear sleeve, the elastic piece is elastically connected with the movable combining sleeve and the gear disc, and the impact is relieved through the separation and reunion of the movable combining sleeve and the fixed combining sleeve, so that the structural stability of the electric drive bridge is effectively protected.

Description

An impact-resistant electric drive axle assembly

Technical Field

The utility model relates to an electric drive axle assembly structure, in particular to an impact-resistant electric drive axle assembly.

Background Art

The electric drive axle is an advanced automobile drive system that integrates key components such as the motor, transmission, differential and drive axle, and drives the wheels through electricity to achieve the driving of the car. Compared with the traditional fuel engine drive system, the electric drive axle has higher energy utilization efficiency, better environmental performance and better power performance, so it has been widely used in modern automobiles.

However, existing electric drive axles have some problems when they encounter impacts at the wheel end. Since the gear set in the electric drive axle is directly connected to the wheel, when the wheel is subjected to external impact, these impacts will be directly transmitted to the gear set. This impact may come from uneven road surface, hitting obstacles, rapid acceleration or deceleration, etc. In the long run, this impact will cause damage to the reducer and gear pair, resulting in a shortened life of the electric drive axle and even failure.

To solve this problem, automotive engineers have been researching and exploring new solutions. Some high-end electric drive axles use advanced control algorithms and sensor technology to monitor the status and stress of the wheel ends in real time, and adjust the output of the motor in time to avoid excessive stress or unnecessary damage. However, this solution requires a lot of computing power and R&D costs. Therefore, it is necessary to provide a simple, practical, impact-resistant electric drive axle assembly.

Utility Model Content

Based on the above description, the utility model provides to solve the above technical problems.

The technical solution of the utility model to solve the above technical problems is as follows:

An impact-resistant electric drive axle assembly comprising

A driving assembly, comprising a secondary driven gear, wherein the secondary driven gear comprises a gear sleeve and a gear plate, wherein the gear sleeve is rotatably mounted on the support portion, and the gear plate is disposed correspondingly to the differential housing;

A differential, comprising a differential housing, a first half-shaft gear, a second half-shaft gear and two planetary gears, wherein the differential housing is rotatably connected to the bridge housing, the first half-shaft gear is mounted on the first half-shaft, the second half-shaft gear is mounted on the second half-shaft, and one end of the differential housing is extended to form a support portion;

The movable clutch comprises a fixed coupling sleeve, a movable coupling sleeve and an elastic member, wherein the fixed coupling sleeve is connected to the differential housing, the movable coupling sleeve is axially movably sleeved on the gear sleeve and rotates synchronously with the gear sleeve, and the elastic member elastically connects the movable coupling sleeve and the gear plate to push the movable coupling sleeve to connect with the fixed coupling sleeve.

Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

The impact-resistant electric drive axle provided in the present application is provided with a movable clutch, so that when the wheel end is subjected to a large impact, the impact can be resolved through the clutch of the movable coupling sleeve and the fixed coupling sleeve, thereby cutting off the impact load from the drive assembly and the gear, and effectively protecting the structural stability of the electric drive axle.

On the basis of the above technical solution, the present invention can also be improved as follows.

Furthermore, a needle bearing is provided between the gear sleeve and the supporting portion.

Furthermore, the inner side wall of the movable coupling sleeve and the outer side wall of the gear sleeve are slidably connected via a spline.

Furthermore, the elastic member includes a compression spring sleeved on the outside of the gear sleeve, one end of the compression spring is fixedly connected to the gear plate, and the other end is connected to the movable coupling sleeve.

Furthermore, the elastic member includes a torsion spring sleeved on the outside of the gear sleeve, and the torsion spring separates the movable coupling sleeve from the fixed coupling sleeve through an externally applied torque.

Furthermore, the movable coupling sleeve and the fixed coupling sleeve are coupled by any one of end face gear locking, friction surface locking or tapered sleeve locking.

Furthermore, the drive assembly also includes a motor, a primary driving gear, a primary driven gear and a secondary driving gear, the output shaft of the motor is drivingly connected to the primary driving gear, the primary driven gear and the primary driving gear constitute a primary reduction gear pair, the secondary driving gear and the primary driven gear are coaxially fixed, and the secondary driven gear and the secondary driving gear constitute a secondary reduction gear pair.

Furthermore, the fixed coupling sleeve and the differential housing are an integrally formed structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an impact-resistant electric drive axle assembly provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of the combined state of the fixed combining sleeve and the movable combining sleeve in the embodiment of the present application.

DETAILED DESCRIPTION

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

It will be appreciated that spatial relationship terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

When used herein, the singular forms "a", "an", and "said/the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include/comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present application provides an impact-resistant electric drive axle assembly, which includes a drive component 10 , a differential 20 , and a movable clutch 30 .

Among them, the driving assembly 10 includes a motor 11, a primary driving gear 12, a primary driven gear 13, a secondary driving gear 14 and a secondary driven gear 15. Specifically, the output shaft of the motor 11 is drivingly connected to the primary driving gear 12, the primary driven gear 13 and the primary driving gear 12 form a primary reduction gear pair, the secondary driving gear 14 and the primary driven gear 13 are coaxially fixed, and the secondary driven gear 15 and the secondary driving gear 14 form a secondary reduction gear pair, thereby forming a two-stage reduction gear transmission structure output from the motor.

The structure of the differential 20 is basically the same as that of a traditional differential, and includes a differential housing 21, a first half-shaft gear 22, a second half-shaft gear 23 and two planetary gears 24, wherein the differential housing 21 is rotatably connected to the two half-shafts 40, 50. In the present embodiment, both ends of the differential housing 21 are rotatably mounted on the two half-shafts 40, 50 through bearing supports, the first half-shaft gear 22 is mounted on the first half-shaft 40, and the second half-shaft gear 23 is mounted on the second half-shaft 50. One end of the differential housing 21 extends to form a support portion 211. In the present embodiment, the first half-shaft 40 is the left half-shaft, and the second half-shaft 50 is the right half-shaft. The left end of the differential housing 21 extends to form a support portion 211.

Among them, the secondary driven gear 15 includes a gear sleeve 151 and a gear plate 152, the gear plate 152 is driven by the secondary driving gear 14, the gear sleeve 151 is rotatably mounted on the support part 211, and the gear plate 152 is arranged corresponding to the differential housing 21. Preferably, a needle bearing 153 is arranged between the gear sleeve 151 and the support part 211.

The movable clutch 30 includes a fixed coupling sleeve 31, a movable coupling sleeve 32 and an elastic member 33, wherein the fixed coupling sleeve 31 is connected to the differential housing 21. As an optional embodiment, the fixed coupling sleeve 31 and the differential housing 21 are an integrally formed structure, and the movable coupling sleeve 32 is axially movablely sleeved on the gear sleeve 151 and rotates synchronously with the gear sleeve 151. Preferably, the inner wall of the movable coupling sleeve 32 and the outer wall of the gear sleeve 151 are slidably connected via a spline; the elastic member 33 elastically connects the movable coupling sleeve 32 and the gear plate 152, and is used to push the movable coupling sleeve 32 to connect with the fixed coupling sleeve 31.

In a preferred embodiment of the present application, the elastic member 33 includes a compression spring sleeved on the outside of the gear sleeve 151 , one end of the compression spring is fixedly connected to the gear plate 152 , and the other end is connected to the movable coupling sleeve 32 .

In other embodiments, the elastic member is a torsion spring sleeved on the outside of the gear sleeve 151 , and the torsion spring separates the movable coupling sleeve 32 from the fixed coupling sleeve 31 through an externally applied torque.

In the present application, the movable coupling sleeve 32 and the fixed coupling sleeve 31 can be combined in a variety of ways. For example, in the present embodiment, the movable coupling sleeve 32 and the fixed coupling sleeve 31 are formed with matching end face teeth on the opposite sides, thereby realizing the matching combination of the end face teeth locking. In other embodiments, they can also be locked by matching friction surfaces, or combined by a conical sleeve connection, which is not limited in the present application.

When the electric drive axle is in use, under normal circumstances, the power and torque transmitted by the motor 11 are transmitted to the movable coupling sleeve 32 through the secondary driven gear 15. Since the movable coupling sleeve 32 is combined with the fixed coupling sleeve 31 under the action of the elastic member 33, as shown in FIG2 , the power can be normally transmitted to the two half-axles through the differential 20; when the wheel end is subjected to a large impact, the movable coupling sleeve 32 slides axially, and the fixed coupling sleeve 31 and the movable coupling sleeve 33 are separated, as shown in FIG1 , cutting off the influence of the impact load on the drive assembly 10. After the impact load is reduced, under the action of the elastic member 33, the movable coupling sleeve 32 slides and resumes the combined state with the fixed coupling sleeve 31.

The electric drive axle is provided with a movable clutch 30, so that when the wheel end is subjected to a large impact, the impact is weakened by the clutch of the movable coupling sleeve 32 and the fixed coupling sleeve 31, thereby cutting off the influence of the impact load on the drive component 10 and the gear pair, effectively protecting the structural stability of the electric drive axle and extending its service life.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. An impact resistant electrically driven bridge assembly comprising

The differential mechanism comprises a differential shell, a first half shaft gear, a second half shaft gear and two planetary gears, wherein the differential shell is rotatably connected with the axle shell, the first half shaft gear is arranged on the first half shaft, the second half shaft gear is arranged on the second half shaft, and a supporting part is formed by extending one end of the differential shell;

The driving assembly comprises a secondary driven gear, the secondary driven gear comprises a gear sleeve and a gear disc, the gear sleeve is rotatably sleeved on the supporting part, and the gear disc and the differential shell are correspondingly arranged;

The movable clutch comprises a fixed combining sleeve, a movable combining sleeve and an elastic piece, wherein the fixed combining sleeve is connected with the differential shell, the movable combining sleeve is axially and movably sleeved on the gear sleeve and synchronously rotates with the gear sleeve, and the elastic piece is elastically connected with the movable combining sleeve and the gear disc and is used for pushing the movable combining sleeve to be connected with the fixed combining sleeve.

2. The impact resistant electric drive axle assembly of claim 1, wherein a needle bearing is disposed between the gear sleeve and the support.

3. The impact resistant electric drive axle assembly of claim 1 wherein the inner side wall of the movable coupling sleeve and the outer side wall of the gear sleeve are slidably connected by splines.

4. The impact resistant electric drive axle assembly of claim 1, wherein the elastic member comprises a compression spring sleeved outside the gear sleeve, one end of the compression spring is fixedly connected to the gear plate, and the other end of the compression spring is connected with the movable combination sleeve.

5. The impact resistant electric drive axle assembly of claim 1 wherein said resilient member is a torsional spring comprising a sleeve mounted on the outside of said gear sleeve, said torsional spring disengaging said movable coupling sleeve from said fixed coupling sleeve by externally applied torque.

6. The impact resistant electric drive bridge assembly of claim 4 or 5, wherein the movable coupling sleeve and the fixed coupling sleeve are coupled by any one of end tooth locking, friction surface locking, or tapered socket locking.

7. The impact resistant electric drive axle assembly of claim 1, wherein the drive assembly further comprises a motor, a primary drive gear, a primary driven gear and a secondary drive gear, an output shaft of the motor is in driving connection with the primary drive gear, the primary driven gear and the primary drive gear form a primary reduction gear pair, the secondary drive gear and the primary driven gear are coaxially fixed, and the secondary driven gear and the secondary drive gear form a secondary reduction gear pair.

8. The impact resistant electric drive axle assembly of claim 1 wherein said fixed coupling sleeve and said differential housing are of unitary construction.