CN214564369U

CN214564369U - Rear axle mechanism with motor

Info

Publication number: CN214564369U
Application number: CN202120717835.4U
Authority: CN
Inventors: 孙永红; 邹兰华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-11-02
Anticipated expiration: 2031-04-08

Abstract

The utility model provides a rear axle mechanism of electrified machine belongs to rear axle technical field. The rear axle solves the problems that the existing rear axle is complex in structure, high in manufacturing cost and incapable of well guaranteeing mechanical strength. This rear axle mechanism with motor, including the rear axle shell, the semi-axis that has the symmetry to set up in the rear axle shell, the both ends of rear axle shell have the wheel hub motor that the symmetry set up, the free end axial of semi-axis extends to in the wheel hub motor and links to each other the fixed assembly structure who forms a body structure with the external rotor of wheel hub motor, this semi-axis and wheel hub motor's external rotor transmission cooperation is provided with the connection structure who makes both link to each other as a body structure between wheel hub motor's internal stator and the rear axle shell. The utility model has the advantages of reasonable design, simply, in-wheel motor and rear axle shell, semi-axis directly link firmly relatively and combine to form a body structure, and structural connection intensity is high, and stability is good, long service life.

Description

Rear axle mechanism with motor

Technical Field

The utility model belongs to the technical field of the rear axle, a rear axle mechanism of electrified machine is related to.

Background

With the gradual withering of petroleum resources and the gradual aggravation of air pollution, the society has stronger and stronger call for new energy automobiles, and compared with the traditional internal combustion engine automobiles, the new energy automobiles have great changes in energy supply forms, no matter the overall arrangement form of the whole automobile or a driving system assembly, wherein the driving system and a rear axle structure are important for the whole automobile, and not only bear the load-bearing function and the driving function, but also directly determine the safety and comfort performance of the whole automobile.

For example, Chinese patent numbers are: "201621055197. X" authorization publication No.: CN206106919U the rear axle connecting structure of an in-wheel motor specifically includes a motor body, a brake, a rear axle connecting structure and a wheel hub, the rear axle connecting structure includes a rear axle, a special nut and a screw, the rear axle is fixedly connected to the brake by the screw, the special nut is disposed at the connection between the rear axle and the brake, one end of the motor body is inserted into and fixed to the rear axle, and the wheel hub is fixedly connected to the other end of the motor.

In the structure, the hub and the motor are fixedly overlapped, the connecting structure is complex, when relative connection is carried out, the relative mounting positions of the hub and the motor are required to be fully calculated, the strength of the connecting structure of the hub and the motor is fully considered, the structure is complex, the manufacturing cost is high, and the mechanical strength cannot be well guaranteed.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a structural design is reasonable, simple, in-wheel motor and rear axle direct bonding, and joint strength is high, and stability is good, long service life's rear axle mechanism with motor.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a take rear axle mechanism of motor, includes the rear axle shell, the rear axle shell in have the semi-axis of symmetry setting, set up differential mechanism on the rear axle shell between two semi-axes, two semi-axes all are connected with the differential mechanism transmission, its characterized in that, the both ends of rear axle shell have the wheel hub motor of symmetry setting, the free end axial of semi-axis extend to in the wheel hub motor and link to each other with the external rotor of wheel hub motor and form the fixed assembly structure of an organic whole structure, this semi-axis and the external rotor transmission cooperation of wheel hub motor, the internal stator of wheel hub motor and rear axle shell between be provided with and make both link to each other the connection structure as an organic whole structure.

This rear axle mechanism with motor mainly sets up wheel hub motor, and the internal stator and the rear axle shell direct bonding through wheel hub motor are fixed, and the semi-axis direct bonding that sets up through wheel hub motor's external rotor and rear axle shell is fixed, and the assembly space is abundant, and structural connection is stable, long service life.

In the rear axle mechanism with the motor, the connecting structure comprises a rear axle sleeve, the rear axle sleeve is fixedly connected with the rear axle shell in the same axial direction, and the inner stator of the hub motor is fixedly connected with the rear axle sleeve in a sleeved mode. The rear axle sleeve is arranged to be used as the axial extension section of the rear axle shell, so that the inner stator of the hub motor and the rear axle shell can be conveniently and directly fixed and assembled, and the hub motor is simple in structure and assembly; during actual assembly, the mechanical strength of the axial connection between the rear axle sleeve and the rear axle housing is to be ensured.

In the rear axle mechanism with the motor, the outer wall of the rear axle sleeve is provided with the reducing step, and the inner stator sleeve of the hub motor is fixedly arranged on the reducing step of the rear axle sleeve. The inner stator of the hub motor and the diameter reducing step of the rear axle sleeve can be fixedly assembled through interference, and a key bar can be arranged between the inner stator of the hub motor and the diameter reducing step of the rear axle sleeve and is axially fixed relatively through the key bar.

In the rear axle mechanism with the motor, the rear axle sleeve coaxially penetrates through the rear axle shell, and the rear axle sleeve and the rear axle shell are coaxially and fixedly connected in a welding mode. The purpose of setting up like this is the mechanical strength who guarantees rear axle sleeve pipe and rear axle shell connection between them, and mechanical strength is high, long service life.

In the rear axle mechanism with the motor, the fixed assembly structure comprises a half axle axially extending outwards to extend out of the rear axle sleeve, the extending end of the half axle is provided with an expanding connecting disc, the outer rotor of the hub motor comprises an outer rotor main body, a left end shell and a right end shell, the left end shell and the right end shell are respectively positioned at two ends of the outer rotor main body, the left end shell and the right end shell are respectively and fixedly connected with the outer rotor main body to form an integral structure, and the expanding connecting disc of the half axle is axially abutted against the corresponding left end shell and is axially and fixedly connected with the left end shell through a bolt. The structure is directly reformed and the extending end of the half shaft forms an expanding connecting disc, the expanding connecting disc and the left end shell are axially and fixedly connected through bolts, the connecting mode of the expanding connecting disc and the left end shell is a flange connecting mode, the connecting stress is stable, and the mechanical strength is high.

In the rear axle mechanism with the motor, the bearings are respectively arranged between the rear axle sleeve and the left end shell and between the rear axle sleeve and the right end shell, the two bearings are positioned at two ends of the inner stator of the hub motor, and the two bearings are respectively and axially abutted and matched with the inner stator of the hub motor. The inner stator of the hub motor is positioned between the two bearings, the relative assembly position of the inner stator of the hub motor is limited through the bearings arranged between the rear axle sleeve and the left end shell and between the rear axle sleeve and the right end shell, the position assembly is accurate, and the structural stability is high.

In the rear axle mechanism with the motor, the right end shell is provided with the connecting cylinder sleeve which is convexly arranged in the axial direction, and the brake shoe assembly is assembled between the connecting cylinder sleeve and the rear axle shell. The connecting sleeve is directly manufactured on the right-end shell in an extending mode, and a braking system of the rear axle is assembled in a combining mode, so that the structure is simple, and the assembly strength is high; in actual use, the brake shoe assembly is an existing product, and is directly available in the market, and detailed description is not needed.

Compared with the prior art, the rear axle mechanism with the motor has the advantages that: the structure design is reasonable and simple, the hub motor, the rear axle shell and the half shaft are directly and relatively fixedly connected to form an integrated structure, the structural connection strength is high, the stability is good, and the service life is long.

Drawings

Fig. 1 is a schematic perspective view of the rear axle mechanism with the motor.

Fig. 2 is a schematic sectional view of the rear axle mechanism with the motor.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure, 1, a rear axle housing; 2. a half shaft; 3. a differential mechanism; 4. a hub motor; 5. an outer rotor; 6. an inner stator; 7. a rear axle sleeve; 8. reducing the diameter of the step; 9. expanding the connecting disc; 10. a left end housing; 11. a right end housing; 12. a bearing; 13. and a connecting cylinder sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, fig. 3, fig. 2 and fig. 2, the rear axle mechanism with the motor mainly comprises a rear axle housing 1, wherein the rear axle housing 1 is internally provided with half shafts 2 which are symmetrically arranged, a differential mechanism 3 is arranged on the rear axle housing 1 between the two half shafts 2, the two half shafts 2 are in transmission connection with the differential mechanism 3, two ends of the rear axle housing 1 are provided with hub motors 4 which are symmetrically arranged, and the hub motors 4 mainly comprise outer rotors 5 and inner stators 6; the free end of the half shaft 2 axially extends into the hub motor 4 and is connected with the outer rotor 5 of the hub motor 4 to form a fixed assembly structure of an integral structure, the half shaft 2 is in transmission fit with the outer rotor 5 of the hub motor 4, and a connecting structure which enables the inner stator 6 of the hub motor 4 and the rear axle shell 1 to be connected into the integral structure is arranged between the two.

During actual manufacturing, the connecting structure mainly comprises a rear axle sleeve 7, the rear axle sleeve 7 is fixedly connected with the rear axle shell 1 in the same axial direction, and an inner stator 6 of the hub motor 4 is fixedly connected with the rear axle sleeve 7 in a sleeved mode; specifically, the method comprises the following steps: the outer wall of the rear axle sleeve 7 is provided with a reducing step 8, and the inner stator 6 of the hub motor 4 is fixedly sleeved on the reducing step 8 of the rear axle sleeve 7; the rear axle sleeve 7 coaxially penetrates through the rear axle housing 1, and the rear axle sleeve 7 and the rear axle housing 1 are coaxially welded and fixedly connected.

In actual manufacturing, the fixed assembly structure is implemented by the following specific modes: the half shaft 2 axially extends outwards to extend out of the rear axle sleeve 7, the extending end of the half shaft 2 is provided with an expanding connecting disc 9, the outer rotor 5 of the hub motor 4 comprises an outer rotor 5 main body, a left end shell 10 and a right end shell 11, the left end shell 10 and the right end shell 11 are respectively positioned at two ends of the outer rotor 5 main body, the left end shell 10 and the right end shell 11 are respectively and fixedly connected with the outer rotor 5 main body to form an integral structure, and the expanding connecting disc 9 of the half shaft 2 is axially abutted against the corresponding left end shell 10 and is axially and fixedly connected with the same through a bolt.

During actual manufacturing, bearings 12 are respectively arranged between the rear axle sleeve 7 and the left end shell 10 and the right end shell 11, the two bearings 12 are positioned at two ends of the inner stator 6 of the hub motor 4, and the two bearings 12 are respectively and axially abutted and matched with the inner stator 6 of the hub motor 4.

In actual production, the right end housing 11 is provided with a connecting sleeve 13 which is arranged in an axially protruding manner, and a brake shoe assembly is assembled between the connecting sleeve 13 and the rear axle housing 1.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although rear axle housing 1 is used more herein; a half shaft 2; a differential mechanism 3; a hub motor 4; an outer rotor 5; an inner stator 6; a rear axle sleeve 7; reducing the diameter of the step 8; expanding the connecting disc 9; a left end housing 10; a right end housing 11; a bearing 12; connecting the cartridge 13, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A rear axle mechanism with a motor comprises a rear axle shell (1), wherein the rear axle shell (1) is internally provided with half shafts (2) which are symmetrically arranged, a differential mechanism (3) is arranged on the rear axle shell (1) between the two half shafts (2), the two half shafts (2) are in transmission connection with the differential mechanism (3), it is characterized in that two ends of the rear axle shell (1) are provided with hub motors (4) which are symmetrically arranged, the free end of the half shaft (2) axially extends into the hub motor (4) and is connected with the outer rotor (5) of the hub motor (4) to form a fixed assembly structure of an integral structure, the half shaft (2) is in transmission fit with an outer rotor (5) of the hub motor (4), a connecting structure which enables the inner stator (6) of the hub motor (4) and the rear axle shell (1) to be connected into a whole is arranged between the inner stator and the rear axle shell.

2. The rear axle mechanism with the motor according to claim 1, wherein the connecting structure comprises a rear axle sleeve (7), the rear axle sleeve (7) is fixedly connected with the rear axle housing (1) in the same axial direction, and the inner stator (6) of the hub motor (4) is fixedly connected with the rear axle sleeve (7) in a sleeved mode.

3. The rear axle mechanism with the motor as claimed in claim 2, wherein the outer wall of the rear axle sleeve (7) is provided with a reducing step (8), and the inner stator (6) of the hub motor (4) is fixedly sleeved on the reducing step (8) of the rear axle sleeve (7).

4. The rear axle mechanism with the motor according to claim 3, characterized in that the rear axle sleeve (7) is coaxially inserted into the rear axle housing (1), and the rear axle sleeve (7) and the rear axle housing (1) are coaxially welded and fixedly connected.

5. The rear axle mechanism with the motor as claimed in claim 4, wherein the fixed assembly structure comprises a half shaft (2) extending axially outwards to extend out of the rear axle sleeve (7), the extending end of the half shaft (2) is provided with a diameter-expanding connecting disc (9), the outer rotor (5) of the hub motor (4) comprises an outer rotor (5) body, a left end housing (10) and a right end housing (11), the left end housing (10) and the right end housing (11) are respectively located at two ends of the outer rotor (5) body, the left end housing (10) and the right end housing (11) are respectively and fixedly connected with the outer rotor (5) body to form an integral structure, and the diameter-expanding connecting disc (9) of the half shaft (2) and the corresponding left end housing (10) are axially abutted and axially and fixedly connected through bolts.

6. The rear axle mechanism with the motor is characterized in that bearings (12) are respectively arranged between the rear axle sleeve (7) and the left end shell (10) and the right end shell (11), the two bearings (12) are positioned at two ends of the inner stator (6) of the hub motor (4), and the two bearings (12) are respectively and axially abutted and matched with the inner stator (6) of the hub motor (4).

7. The rear axle mechanism with the motor as claimed in claim 5 or 6, characterized in that the right end housing (11) is provided with a connecting sleeve (13) which is axially protruded, and a brake shoe assembly is assembled between the connecting sleeve (13) and the rear axle housing (1).