Compact electric drive assembly with suspension fixing structure

Abstract

The compact electric drive assembly with the suspension fixing structure comprises a motor, the motor comprises a shell, a driving shaft and a rotary transformer, the driving shaft is arranged at one end of the front end of the shell to output torque, and the rotary transformer is arranged at the rear end of the shell and is coaxial with the driving shaft; the suspension fixing structure comprises a suspension threaded support arranged at the rear end of the shell and a suspension fixing support with one end connected with an automobile body, the other end of the suspension threaded support is connected with the suspension fixing support, and the projection area formed by the suspension fixing support at the rear end of the shell in the axial direction can be increased through the suspension threaded support. The connecting position of the suspension fixing support and the shell is moved to the position of the end face of the rear end of the shell through the arrangement of the suspension threaded support, then the overall longitudinal length of the shell and the suspension fixing support is reduced, the crumple installation distance between the electric drive assembly and the front anti-collision beam support is increased, and the safety performance of an automobile is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile suspension system, specifically relates to a compact electric drive assembly with suspension fixing structure. BACKGROUND

[0002] The electric drive assembly is a kind of mechatronic drive system designed for electric vehicle, and it mainly includes driving motor, speed reducer and controller, wherein the driving motor includes driving shaft, motor shell and rotary transformer, the rotary transformer is the core position sensor of permanent magnet synchronous motor, it is usually integrated in motor front end (close to power output shaft side), high-precision closed-loop control is realized by detecting rotor magnetic pole angle, it needs to keep strict coaxiality with motor shell and driving shaft to guarantee signal strength.Current suspension support is integrally pressure cast with motor shell, rigid connection of electric drive assembly and frame is realized through reserved threaded hole or positioning pin, but when threaded hole appears thread damage and other conditions in use process, motor shell integrally pressure cast with it needs to be replaced, and maintenance cost is improved.

[0003] The existing Chinese published patent CN216033686U provides a motor suspension support positioning structure capable of reducing the cumulative tolerance of suspension support assembly, one end of the suspension support body is provided with a sub-frame mounting hole, the other end is provided with a plurality of motor mounting holes, a pin sleeve is arranged in the motor mounting hole, the pin sleeve protrudes out of the suspension support body, the pin sleeve is inserted into the threaded hole of the motor assembly to form positioning cooperation, and the suspension support body and the motor assembly are fixedly connected by bolts passing through the motor mounting hole, the pin sleeve and the threaded hole. As shown in the drawings, the rotary transformer of the patent is installed at the rear end of the motor, which can simplify the structure of the motor and only need to remove the cover plate at the rear end of the motor for maintenance and replacement. However, the longitudinal dimension (vehicle length direction) of the suspension support and the motor assembly shell of the patent is increased, so that the installation and fixing position of the suspension support of the electric drive assembly is close to the vehicle head, the rigid body of the electric drive assembly occupies the energy absorption space, the collapse installation distance between the front anti-collision beam and the electric drive assembly is reduced, and safety problem is caused. UTILITY MODEL CONTENTS

[0004] The utility model provides a compact electric drive assembly with suspension fixing structure to solve the problem that the rotary transformer is installed at the rear end of the motor, which reduces the collapse installation distance between the electric drive assembly and the front anti-collision beam support, and the specific technical scheme is as follows:

[0005] The utility model provides a compact electric drive assembly with suspension fixing structure, which comprises a motor, the motor comprising a shell, a drive shaft and a resolver, the drive shaft being arranged at one end of the front end of the shell to output torque, and the resolver being arranged at the rear end of the shell and coaxial with the drive shaft; the suspension fixing structure comprises a suspension threaded support arranged at the rear end of the shell and a suspension fixing support connected to the automobile body at one end, the other end of the suspension threaded support being connected to the suspension fixing support, and the suspension threaded support being capable of increasing the projection area of the suspension fixing support in the axial direction at the rear end of the shell.

[0006] Preferably, the suspension threaded support comprises a support plate connected to the rear end of the shell, the surface of the support plate being triangular in shape; and a threaded pipe arranged on the support plate, the end face of the threaded pipe opposite to the drive shaft having a gap, and the threaded pipe being consistent with the axial direction of the drive shaft.

[0007] Preferably, the suspension threaded support further comprises a reinforcing rib protruding from the surface of the support plate away from the rear end of the shell, one end of the reinforcing rib being connected to the threaded pipe, and the other end of the reinforcing rib being connected to the connecting point of the support plate and the shell.

[0008] Preferably, the suspension threaded support is made of steel.

[0009] Preferably, one end of the suspension fixing support is connected to the threaded pipe, and the other end of the suspension fixing support is connected to the automobile body to fix the position of the motor relative to the automobile body.

[0010] According to the above technical solution, the utility model has the following beneficial effects:

[0011] The utility model moves the connecting position of the suspension fixing support and the shell to the rear end surface of the shell by arranging the suspension threaded support, thereby reducing the longitudinal length of the shell and the suspension fixing support as a whole, increasing the collapse installation distance between the electric drive assembly and the front bumper beam support, and improving the safety performance of the automobile; meanwhile, the suspension threaded support, the suspension fixing support and the shell are designed in a split manner, so that they can be easily replaced when they fail, avoiding overall replacement and reducing replacement cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 It is an enlarged view of the structure at A in Figure 1

[0014] In the figure: 1, motor; 11, shell; 12, drive shaft; 2, resolver; 3, suspension threaded support; 31, threaded pipe; 32, support plate; 33, reinforcing rib; 4, suspension fixing support. DETAILED DESCRIPTION

[0015] ​The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figure 1 As shown, this embodiment is a compact electric drive assembly with a suspended fixed structure, which includes a motor 1. The motor 1 includes a housing 11, a drive shaft 12 and a rotary transformer 2. The drive shaft 12 is located at one end of the front end of the housing 11 to output torque, and the rotary transformer 2 is located at the rear end of the housing 11 and is coaxial with the drive shaft 12.

[0018] Specifically, as is known from common knowledge, the electric drive assembly includes a motor 1, a reducer, and a controller. The motor 1 includes a stator, a rotor, a housing 11, a cooling system, and integrated sensors. The drive shaft 12 is the rotor, which can output torque, and one end of the output torque is connected to the reducer. The end of the housing 11 closest to the reducer is the front end, and the end furthest from the reducer is the rear end. The rotary transformer 2 is mounted on the side of the drive shaft 12 located at the rear end of the housing 11. The two are coaxial, which allows the rotary transformer 2 to monitor the rotation status of the drive shaft 12 in real time and also simplifies the installation structure by keeping it away from the reducer. At the same time, the rear end of the housing 11 forms a cavity for placing the rotary transformer 2, and a cover plate connected by bolts seals the cavity to form a sealed space for placing the rotary transformer 2, maintaining the airtightness and cleanliness of its working environment, improving its service life, and facilitating its replacement and maintenance.

[0019] Furthermore, the suspension fixing structure includes a suspension threaded bracket 3 disposed at the rear end of the housing 11 and a suspension fixing bracket 4 connected to the vehicle body at one end. The other end of the suspension threaded bracket 3 is connected to the suspension fixing bracket 4. The suspension threaded bracket 3 can increase the projected area formed by the suspension fixing bracket 4 along the axial direction at the rear end of the housing 11.

[0020] Specifically, one end of the suspension threaded support 3 is fixedly connected with the rear end of the shell 11 through a bolt, and the other end is fixedly connected with the suspension fixed support 4 through a bolt, so that the suspension fixed support 4 is fixed relative to the motor 1, and the other end of the suspension fixed support 4 is fixedly connected with the automobile body through a bolt, so that the motor 1 is fixedly connected with the automobile body through the suspension threaded support 3 and the suspension fixed support 4.

[0021] The connection position of the suspension threaded support 3 and the suspension fixed support 4 is located directly above the rear end face of the shell 11, and the suspension fixed support 4 can form a projection on the rear end face of the shell 11 along the axial direction of the drive shaft 12. When the connection position moves, the projection area also moves. Secondly, the width direction of the automobile body is defined as the transverse direction, and the direction perpendicular to the transverse direction is the longitudinal direction. Since the transverse distance between the suspension fixed support 4 and the suspension threaded support 3 is fixed, when the connection position moves in the longitudinal direction, the longitudinal length of the suspension fixed support 4 and the motor 1 as a whole changes. When the longitudinal length of the suspension fixed support 4 and the motor 1 as a whole decreases, the crush installation distance of the motor 1 from the front bumper beam increases, thereby improving the safety performance of the automobile in a collision.

[0022] As shown in Figure 2 The suspension threaded support 3 includes a support plate 32 connected with the rear end of the shell 11, and the surface of the support plate 32 is a triangular shape. A threaded tube 31 is arranged on the support plate 32, and the end face of the threaded tube 31 opposite to the drive shaft 12 has a gap.

[0023] Specifically, one side of the support plate 32 is fixedly connected with the rear end of the shell 11 through a bolt, and the vertex corresponding to the side is welded with the threaded tube 31. The axis of the threaded tube 31 is consistent with the axial direction of the drive shaft 12, and the projection of the threaded tube 31 in the axial direction completely falls on the end face of the rear end of the shell 11, thereby reducing the longitudinal length of the suspension threaded support 3 and the motor 1 as a whole. Secondly, the end face of the drive shaft 12 is placed in the sealed cavity formed by the cover plate, and the gap between the threaded tube 31 and the end face of the drive shaft 12 is used to place the cover plate, thereby facilitating the subsequent replacement and maintenance of the resolver 2.

[0024] Further, the suspension threaded support 3 further includes a reinforcing rib 33 protruding from the surface of the support plate 32 away from the rear end of the shell 11. One end of the reinforcing rib 33 is connected with the threaded tube 31, and the other end of the reinforcing rib 33 is connected with the connection point of the support plate 32 and the shell 11.

[0025] Specifically, the support plate 32 is fixedly connected with the rear end of the shell 11 through three threaded holes, and the suspension threaded support 3 forms three reinforcing ribs 33 to connect the threaded holes and the threaded tube 31, thereby improving the structural strength of the support plate 32, avoiding the shaking of the motor 1 during the driving of the automobile, and ensuring the positional accuracy of the motor 1 relative to the automobile body.

[0026] Further, the suspension threaded support 3 is made of steel.

[0027] Specifically, the steel can improve the structural strength of the suspension threaded support 3 and the strength of the thread, improve the strength of the suspension fixed support 4 and the threaded connection thereof, and improve the service life.

[0028] Further, one end of the suspension fixed support 4 is connected with the threaded pipe 31, and the other end of the suspension fixed support 4 is connected with the vehicle body to fix the position of the motor 1 relative to the vehicle body.

[0029] Specifically, one end of the suspension fixed support 4 is fixedly connected with the threaded pipe 31 through a bolt, so that the suspension fixed support 4 and the suspension threaded support 3 become an integral whole, and the other end of the suspension fixed support 4 is fixedly connected with the vehicle body through a bolt, so that the motor 1, the suspension threaded support 3 and the suspension fixed support 4 form an integral whole.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

[0031] The technical, shape and structure parts not described in detail in the utility model are all known technologies.

Claims

1. A compact electric drive assembly with a suspended fixed structure, comprising a motor (1), said motor (1) including a housing (11), a drive shaft (12), and a rotary transformer (2), characterized in that: The drive shaft (12) is located at one end of the front end of the housing (11) to output torque, and the rotary transformer (2) is located at the rear end of the housing (11) and is coaxial with the drive shaft (12); The suspension fixing structure includes a suspension threaded bracket (3) disposed at the rear end of the housing (11) and a suspension fixing bracket (4) connected to the vehicle body at one end. The other end of the suspension threaded bracket (3) is connected to the suspension fixing bracket (4). The suspension threaded bracket (3) can increase the projected area formed by the suspension fixing bracket (4) along the axial direction at the rear end of the housing (11).

2. The compact electric drive assembly according to claim 1, characterized in that: The suspended threaded bracket (3) includes: A support plate (32) is connected to the rear end of the housing (11), and the surface of the support plate (32) is in a triangular shape; A threaded tube (31) is provided on the support plate (32). There is a gap between the end face of the threaded tube (31) and the drive shaft (12). The axial direction of the threaded tube (31) and the drive shaft (12) are consistent.

3. The compact electric drive assembly according to claim 2, characterized in that: The suspended threaded bracket (3) further includes a reinforcing rib (33) protruding from the side of the support plate (32) away from the rear end of the housing (11). One end of the reinforcing rib (33) is connected to the threaded tube (31), and the other end of the reinforcing rib (33) is connected to the connection point between the support plate (32) and the housing (11).

4. The compact electric drive assembly according to claim 3, characterized in that: The suspended threaded bracket (3) is made of steel.

5. The compact electric drive assembly according to claim 2, characterized in that: One end of the suspension fixing bracket (4) is connected to the threaded pipe (31), and the other end of the suspension fixing bracket (4) is connected to the vehicle body to fix the position of the motor (1) relative to the vehicle body.

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