CN212106847U

CN212106847U - Integrated assembly structure of automobile reduction gearbox and motor

Info

Publication number: CN212106847U
Application number: CN202020500496.XU
Authority: CN
Inventors: 林志鸿; 茆凡; 季津华
Original assignee: Changshu Meiqiao Automotive Drive System Manufacturing Technology Co ltd
Current assignee: Changshu Meiqiao Automotive Drive System Manufacturing Technology Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-12-08
Anticipated expiration: 2030-04-08

Abstract

The utility model discloses an integrated assembly structure of car reducing gear box and motor relates to automobile spare and accessory part assembly technical field, aims at solving the reducing gear box and when matching with the motor, and the junction often is that the motor shaft is deepened the reducing gear box side, causes the reducing gear box input shaft diameter too big, leads to corresponding design difficulty, problem that the cost rises. The technical scheme is that the device comprises a shell provided with a reduction gearbox and a motor, and a differential mechanism, a motor rotor shaft and a reduction gearbox input shaft which are positioned in the shell, wherein a cavity for the reduction gearbox input shaft to insert is formed in the tail end of the motor rotor shaft, and a connecting spline for fixing the motor rotor shaft and the reduction gearbox input shaft is arranged on the inner wall of the cavity. The input shaft of the reduction gearbox extends to the motor side, the form of an external spline of the input shaft of the reduction gearbox and an internal spline of a rotor shaft of the motor is adopted, the diameter of the input shaft of the reduction gearbox is effectively reduced, the coaxiality is guaranteed while the system strength is guaranteed, and the high-speed bearing and the high-speed oil seal are easy to select.

Description

Integrated assembly structure of automobile reduction gearbox and motor

Technical Field

The utility model belongs to the technical field of the technique of automobile spare and accessory part assembly and specifically relates to an integrated assembly structure of automobile reduction box and motor is related to.

Background

The motor of the automobile outputs power through the motor shaft, but the motor shaft is high in rotating speed, so that the motor cannot be used for directly driving the automobile, and the power is output after being decelerated through the reduction box.

The motor shaft and the box body of the reduction box are supported on the box body of the reduction box through a bearing, and the supported bearing is directly arranged in a mounting hole arranged on the box body of the reduction box.

The above prior art solutions have the following drawbacks: when the reduction gearbox is matched with the motor, the connection part is often that the motor shaft extends into the reduction gearbox side, so that the diameter of the input shaft of the reduction gearbox is too large, the corresponding design is difficult, the cost is increased, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integrated assembly structure of car reducing gear box and motor, it has reduce cost, lightweight design, lift system rigidity, the easier effect of integration.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the integrated assembly structure of the automobile reduction gearbox and the motor comprises a shell provided with the reduction gearbox and the motor, and a differential mechanism, a motor rotor shaft and a reduction gearbox input shaft which are positioned in the shell, wherein a cavity for inserting the reduction gearbox input shaft is formed in the tail end of the motor rotor shaft, and a connecting spline for fixing the motor rotor shaft and the reduction gearbox input shaft is arranged on the inner wall of the cavity.

The utility model discloses further set up to: one end, far away from the motor rotor shaft, of the input shaft of the reduction gearbox extends into an outer cover of the differential mechanism and is connected with a needle bearing, and the needle bearing is connected with an inner hole of an output end of the differential mechanism.

The utility model discloses further set up to: and a ball bearing for supporting is arranged outside the output end of the differential.

The utility model discloses further set up to: and a support bearing used for supporting the input shaft of the reduction gearbox is arranged in the shell, and the support bearing is a high-speed ball bearing.

The utility model discloses further set up to: and an intermediate shaft is connected to the side surface of the input shaft of the reduction gearbox.

The utility model discloses further set up to: and an input oil seal for separating the reduction gearbox and the motor is arranged in the shell.

To sum up, the utility model discloses a beneficial technological effect does:

1. through the arrangement of the connecting spline, the input shaft of the reduction gearbox extends to the motor side, and the form of the external spline of the input shaft of the reduction gearbox and the internal spline of the rotor shaft of the motor is adopted, so that the diameter of the input shaft of the reduction gearbox is effectively reduced, the system strength is ensured, the coaxiality is ensured, and the type selection of a high-speed bearing and a high-speed oil seal is easy;

2. through the arrangement of the needle bearing and the ball bearing, the input shaft of the reduction gearbox is extended into the outer cover of the differential, the needle bearing is connected with the inner hole of the output end of the differential, and the ball bearing is used for supporting the output end of the differential, so that the assembly stability is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

In the figure, 1, a housing; 2. a differential mechanism; 3. a motor rotor shaft; 31. a cavity; 32. connecting a spline;

4. a reduction gearbox input shaft; 41. an intermediate shaft; 5. a needle bearing; 6. a ball bearing; 7. a support bearing;

8. and inputting an oil seal.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1, for the utility model discloses an integrated assembly structure of car reducing gear box and motor, including the casing 1 of installing reducing gear box and motor and differential mechanism 2, electric motor rotor axle 3, the reducing gear box input shaft 4 that are located casing 1, electric motor rotor axle 3's end is seted up and is supplied reducing gear box input shaft 4 male cavity 31, is provided with the connecting spline 32 that is used for fixed electric motor rotor axle 3 and reducing gear box input shaft 4 on the inner wall of cavity 31. In the embodiment, the input shaft 4 of the reduction gearbox adopts an external spline, and the motor rotor shaft 3 is designed into an internal spline, so that the diameter of the input shaft 4 of the reduction gearbox is effectively reduced, the system strength is ensured, the coaxiality is ensured, and the high-speed bearing and the high-speed oil seal are easy to select.

Referring to fig. 1, one end of the reduction gearbox input shaft 4, which is far away from the motor rotor shaft 3, extends into the outer cover of the differential 2 and is connected with a needle bearing 5, and the needle bearing 5 is connected with an inner hole of the output end of the differential 2. The ball bearing 6 for supporting is arranged outside the output end of the differential 2, so that the assembly stability is improved.

Referring to fig. 1, a support bearing 7 for supporting the input shaft 4 of the reduction gearbox is provided in the housing 1, and in this embodiment, the support bearing 7 is a high-speed ball bearing. The support bearing 7 of the input shaft 4 of the reduction gearbox is positioned on the common shell 1 of the reduction gearbox and the motor. An input oil seal 8 for separating the reduction box from the motor is arranged in the shell 1.

Referring to fig. 1, an intermediate shaft 41 is connected to the side surface of the reduction gearbox input shaft 4, and the gear of the reduction gearbox input shaft 4 is transferred to the gear of the differential 2 through the gear of the intermediate shaft 41, so that the power flow is coaxial.

The implementation principle of the embodiment is as follows: reduction box input shaft 4 extends to the motor side, adopts the form of 4 external splines of reduction box input shaft, 3 internal splines of motor rotor axle, and this design has effectively reduced 4 diameters of reduction box input shaft, lightweight design, and reduce cost has guaranteed the axiality when having guaranteed system's intensity, also makes the type selection of high-speed bearing and high-speed oil blanket become easy, and the integration is easier.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides an integrated assembly structure of car reducing gear box and motor, is including casing (1) of installing reducing gear box and motor and differential mechanism (2), electric motor rotor axle (3), reducing gear box input shaft (4) that are located casing (1), its characterized in that: the motor rotor shaft is characterized in that a cavity (31) for inserting the reduction gearbox input shaft (4) is formed in the tail end of the motor rotor shaft (3), and a connecting spline (32) for fixing the motor rotor shaft (3) and the reduction gearbox input shaft (4) is arranged on the inner wall of the cavity (31).

2. The integrated assembly structure of the reduction box and the motor of the automobile according to claim 1, characterized in that: one end, far away from the motor rotor shaft (3), of the reduction gearbox input shaft (4) extends into an outer cover of the differential mechanism (2) and is connected with a needle bearing (5), and the needle bearing (5) is connected with an inner hole of an output end of the differential mechanism (2).

3. The integrated assembly structure of the reduction gearbox and the motor of the automobile as claimed in claim 2, wherein: and a ball bearing (6) for supporting is arranged outside the output end of the differential (2).

4. The integrated assembly structure of the reduction box and the motor of the automobile according to claim 1, characterized in that: a supporting bearing (7) used for supporting the input shaft (4) of the reduction gearbox is arranged in the shell (1), and the supporting bearing (7) is a high-speed ball bearing.

5. The integrated assembly structure of the reduction gearbox and the motor of the automobile as claimed in claim 4, wherein: an intermediate shaft (41) is connected to the side surface of the input shaft (4) of the reduction gearbox.

6. The integrated assembly structure of the reduction box and the motor of the automobile according to claim 1, characterized in that: an input oil seal (8) for separating the reduction gearbox and the motor is arranged in the shell (1).