Fixing structure in coaxial driving of motor of electric vehicle

Abstract

The utility model discloses a fixing structure in coaxial driving of an electric vehicle motor, which comprises a bottom fork shaft, a motor, a speed reducer and a hub, two ends of the bottom fork shaft are fixedly connected with a bottom fork, and the motor comprises a casing and a cover; the side face of the machine cover is provided with a reaction torque clamping groove, the flat square portion of the bottom fork is correspondingly clamped in the reaction torque clamping groove, the speed reducer comprises a power output shaft, the hub is provided with an installation hole, the installation hole and the power output shaft are respectively provided with flat positions which are correspondingly matched, the power output shaft is further provided with a locking nut for fixing the hub, and the locking nut is connected with the hub. A unilateral-opening through groove is axially formed in the locking nut, and a reinforcing screw for locking the unilateral-opening through groove is correspondingly arranged on the locking nut. According to the utility model, reaction torque positioning is formed between the motor and the bottom fork, so that the stability, safety and transmission efficiency of power transmission are improved through the reaction torque positioning design on the motor; the unilateral opening through groove in the locking nut is matched with the reinforcing screw, so that the reliability of the locking nut for pressing the hub is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed gear motors for electric vehicles, in particular to a fixing structure in a coaxial drive of a motor for an electric vehicle. Background Art

[0002] In the field of electric drive for pure electric vehicles, the commonly used structural forms are the wheel hub motor method and the mid-mounted motor method. Although the wheel hub motor method has a simple structure and no intermediate transmission device, the wheel hub motor is heavy, has a large moment of inertia and low efficiency, which not only affects the handling performance of the vehicle, but also increases material costs; the mid-mounted motor has a longer power transmission path.

[0003] With the development of electric vehicle technology, the motor part structure is arranged on the spoke side of the wheel hub to form a side-mounted motor. The side-mounted motor usually has a power part and an output part. The output part is respectively connected to the side-mounted motor and the wheel hub for transmission, so that the power of the rotor is transmitted to the wheel hub through the output shaft to drive the wheel hub to rotate; however, the existing mechanism has defects in the connection between the power output shaft and the wheel hub, and in the connection between the flat fork and the motor. As time goes by, they are prone to loosening, which affects power transmission and safety. Therefore, it is very necessary to improve the defects of the existing structure. Summary of the invention

[0004] The purpose of the utility model is to solve the problems raised in the above background technology and provide a fixing structure in the coaxial drive of the electric vehicle motor.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a fixed structure in the coaxial drive of an electric vehicle motor, comprising a flat fork shaft, a motor, a reducer, and a wheel hub, the flat fork shaft passes through the middle of the motor and the reducer, and the two ends of the flat fork shaft are fixedly connected to the flat fork, and the motor comprises a casing and a machine cover; the side of the machine cover is provided with an anti-torque slot, and the flat square part of the flat fork is correspondingly stuck in the anti-torque slot, the reducer comprises a power output shaft connected to the wheel hub transmission, the wheel hub is provided with a mounting hole, and the mounting hole and the power output shaft are respectively provided with corresponding matching flat positions, and the power output shaft is also provided with a locking nut for fixing the wheel hub, and a single-sided open through groove is axially opened on the locking nut, and a reinforcing screw corresponding to the single-sided open through groove is provided on the locking nut.

[0006] In the above-mentioned fixed structure in the coaxial drive of an electric vehicle motor, a mounting plane is provided on the side of the machine cover, and an upper positioning block and a lower positioning block are respectively provided on the mounting plane, and an anti-torque slot is formed between the upper positioning block and the lower positioning block, and the flat square part of the flat fork is correspondingly stuck in the anti-torque slot, and the upper and lower side surfaces form a fit and abutment with the upper positioning block and the lower positioning block.

[0007] In the above-mentioned fixing structure in the coaxial drive of the electric vehicle motor, the locking nut is provided with a reinforcing screw hole for connecting a reinforcing screw, and the central axis of the reinforcing screw hole is designed to be perpendicular to the single-sided opening through slot at 90 degrees.

[0008] In the above-mentioned fixed structure in the coaxial drive of an electric vehicle motor, the motor also includes a motor shaft and an encoder assembly, an induction magnetic ring corresponding to the encoder assembly is installed on the motor shaft, and the motor shaft and the induction magnetic ring are respectively provided with corresponding shaft positioning R grooves and R-shaped positioning bosses.

[0009] In the above-mentioned fixing structure in the coaxial drive of the electric vehicle motor, the side surface of the locking nut is fixed against the side surface of the wheel hub.

[0010] The beneficial effects of the utility model are:

[0011] In the utility model, an anti-torque slot is provided on the side of the motor cover, and the flat square part of the connected flat fork is correspondingly clamped in the anti-torque slot, so that an anti-torque positioning is formed between the motor and the flat fork, thereby improving the stability, safety and transmission efficiency of power transmission through the anti-torque positioning design on the motor.

[0012] At the same time, a single-sided open through slot and a reinforcing screw 90 degrees perpendicular to the single-sided open through slot are provided on the locking nut between the power output shaft and the wheel hub. The reinforcing screw greatly improves the reliability of the locking nut pressing the wheel hub through the single-sided open through slot, ensuring that the locking nut will not loosen when the wheel hub is running, thereby improving stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 It is an exploded view of the utility model;

[0015] Figure 3 It is an exploded view between the motor and the wheel hub in the utility model;

[0016] Figure 4 It is an exploded view of the motor in the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the implementation mode of the utility model clearer, the technical solution in the implementation mode of the utility model will be clearly and completely described below in conjunction with the figures in the implementation mode of the utility model; in the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the figure, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0018] The utility model is further described below in conjunction with the drawings.

[0019] See also Figures 1 to 4 The utility model provides a fixed structure in the coaxial drive of an electric vehicle motor, including a flat fork shaft 1, a motor 2, a reducer 3, and a wheel hub 4. The flat fork shaft 1 passes through the middle of the motor 2 and the reducer 3, and the two ends of the flat fork shaft 1 are fixedly connected to the flat fork 5. The motor 2 includes a casing 6 and a cover 7.

[0020] The side of the machine cover 7 is provided with an anti-torque slot 8, and the flat square portion 5-1 of the flat fork 5 is correspondingly stuck in the anti-torque slot 8. A mounting plane 15 is provided on the side of the machine cover 7, and an upper positioning block 16 and a lower positioning block 17 are respectively provided on the mounting plane 15. The above-mentioned anti-torque slot 8 is formed between the upper positioning block 16 and the lower positioning block 17. During installation, the flat square portion 5-1 of the flat fork 5 is correspondingly stuck in the anti-torque slot 8, and the upper and lower side surfaces are fitted and abutted against the upper positioning block 16 and the lower positioning block 17.

[0021] The flat square part of the connected flat fork 5 is correspondingly clamped in the anti-torque clamping groove 8 provided on the side of the cover 7 of the motor 2, so that an anti-torque positioning is formed between the motor 2 and the flat fork 5, thereby improving the stability, safety and transmission efficiency of power transmission through the anti-torque positioning design on the motor

[0022] The reducer 3 includes a power output shaft 9 that is transmission-connected to the wheel hub 4. The wheel hub 4 is provided with a mounting hole 10. The mounting hole 10 and the power output shaft 9 are respectively provided with corresponding matching flat positions 11. The power output shaft 9 is also provided with a locking nut 12 for fixing the wheel hub 4. The locking nut 12 is axially provided with a single-sided open through groove 13. The locking nut 12 corresponds to a reinforcing screw 14 for locking the single-sided open through groove 13. A reinforcing screw hole 18 for connecting the reinforcing screw 14 is provided on the locking nut 12. The side surface of the locking nut 12 is fixed against the side surface of the wheel hub 4. The reinforcing screw greatly improves the reliability of the locking nut pressing the wheel hub through the single-sided open through groove, ensures that the locking nut will not loosen when the wheel hub is running, and improves stability and safety; preferably, in order to improve the firmness of the locking, the central axis of the reinforcing screw hole 18 is designed to be 90 degrees vertical to the single-sided open through groove 13.

[0023] The motor 2 also includes a motor shaft 19 and an encoder assembly 20. An induction magnetic ring 21 corresponding to the encoder assembly 20 is installed on the motor shaft 19. The induction magnetic ring 21 is tightly matched with the motor shaft 19, and corresponding shaft positioning R grooves 22 and R-shaped positioning bosses 23 are respectively provided on the motor shaft 19 and the induction magnetic ring 21; this facilitates the assembly and firmness between the induction magnetic ring 21 and the motor shaft 19, and quickly unifies the relative position correspondence between the induction magnet 21 and the encoder assembly 20, thereby ensuring the angle consistency of batch products.

[0024] The above is a detailed introduction to a fixed structure in a coaxial drive of an electric vehicle motor provided by an embodiment of the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution disclosed by the utility model; at the same time, for general technical users in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation of the utility model.

Claims

1. A fixed structure in a coaxial drive of an electric vehicle motor, comprising a flat fork shaft (1), a motor (2), a reducer (3), and a wheel hub (4), wherein the flat fork shaft (1) passes through the middle of the motor (2) and the reducer (3), and both ends of the flat fork shaft (1) are fixedly connected to the flat fork (5), and the motor (2) comprises a housing (6) and a cover (7); the characteristics are: The side of the cover (7) is provided with an anti-torque slot (8), and the flat square portion (5-1) of the flat fork (5) is correspondingly engaged in the anti-torque slot (8). The reducer (3) includes a power output shaft (9) drivingly connected to the wheel hub (4), the wheel hub (4) is provided with a mounting hole (10), and the mounting hole (10) and the power output shaft (9) are respectively provided with corresponding matching flat positions (11), and the power output shaft (9) is also provided with a locking nut (12) for fixing the wheel hub (4), and the locking nut (12) is axially provided with a single-sided open slot (13), and the locking nut (12) is provided with a reinforcing screw (14) for locking the single-sided open slot (13).

2. The fixing structure in the coaxial drive of an electric vehicle motor according to claim 1, characterized in that: The side of the cover (7) is provided with a mounting plane (15), and an upper positioning block (16) and a lower positioning block (17) are respectively provided on the mounting plane (15); an anti-torque clamping groove (8) is formed between the upper positioning block (16) and the lower positioning block (17); the flat square portion (5-1) of the flat fork (5) is correspondingly clamped in the anti-torque clamping groove (8), and the upper and lower side surfaces are fitted and abutted against the upper positioning block (16) and the lower positioning block (17).

3. The fixing structure in the coaxial drive of an electric vehicle motor according to claim 1, characterized in that: The locking nut (12) is provided with a reinforcing screw hole (18) for connecting a reinforcing screw (14), and the central axis of the reinforcing screw hole (18) is designed to be perpendicular to the single-sided opening through slot (13) at 90 degrees.

4. The fixing structure in the coaxial drive of an electric vehicle motor according to claim 1, characterized in that: The motor (2) further comprises a motor shaft (19) and an encoder assembly (20); an induction magnetic ring (21) corresponding to the encoder assembly (20) is mounted on the motor shaft (19); and corresponding shaft positioning R grooves (22) and R-shaped positioning bosses (23) are respectively provided on the motor shaft (19) and the induction magnetic ring (21).

5. The fixing structure in the coaxial drive of an electric vehicle motor according to claim 1 or 3, characterized in that: The side surface of the locking nut (12) is abutted and fixed against the side surface of the wheel hub (4).

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