Planetary gear transmission motor

Abstract

The utility model provides a planetary gear transmission motor. The planetary gear transmission motor comprises a motor and a planetary reducer, a motor stator of the motor is connected with a resolver sensor B through a screw B, and the resolver sensor B is connected with a resolver sensor A through a screw A; a motor rotor of the motor is connected with a planetary reducer inner gear ring of the planetary reducer through a screw C. A planetary reducer output shaft of the planetary reducer is connected with a planet wheel through a planet carrier. The planet gear is meshed with the sun gear, and the motor rotor is connected with the sun gear. According to the utility model, the output torque is greatly improved, the output rotating speed is reduced, the size used by the motor is reduced, the axial space utilization rate is increased, and the torque density ratio is improved; the transmission precision abnormity caused by the assembly clearance is eliminated, and due to the dual-redundancy design, the robustness of the whole machine can be greatly improved.

Description

Technical Field

[0001] The utility model relates to a planetary gear transmission motor, in particular to a motor with a planetary reducer and a motor rotor integrated, belonging to the technical field of motors and planetary reducers. Background Art

[0002] Brushless torque motors have the characteristics of high speed, wide operating range, and high control accuracy. Planetary reducers have the characteristics of small size, strong load-bearing capacity, compact structure, and high transmission accuracy. The two are usually used together to reduce the speed and increase the output torque. Use the planetary reducer as power output and the motor rotor as power input.

[0003] The above technology adopts a motor and planetary reducer splicing mode, which has a large axial length and low position accuracy, and it is difficult to meet the existing small axial size requirements. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a planetary gear transmission motor.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a planetary gear transmission motor, comprising a motor and a planetary reducer; the motor stator of the motor is connected to a rotational sensor B through a screw B, and the rotational sensor B is connected to a rotational sensor A through a screw A; the motor rotor of the motor is connected to the planetary reducer inner gear ring of the planetary reducer through a screw C, and the planetary reducer output shaft of the planetary reducer is connected to a planetary wheel through a planetary carrier; the planetary wheel is meshed with the sun wheel, and the motor rotor is connected to the sun wheel.

[0007] A deep groove ball bearing A and a deep groove ball bearing B are provided at both ends of the motor rotor.

[0008] The motor rotor and the sun gear are connected by interference welding and laser welding.

[0009] One end of the output shaft of the planetary reducer is provided with a deep groove ball bearing C, a hole clamping ring and a shaft retaining ring.

[0010] A gasket is arranged between the motor rotor and the planetary gear.

[0011] The motor winding of the motor adopts double winding.

[0012] The beneficial effects of the utility model are: greatly improving the output torque, reducing the output speed, reducing the volume used by the motor, increasing the axial space utilization, and improving the torque density ratio; eliminating the transmission accuracy abnormality caused by the assembly gap, and thanks to the double redundancy design, the robustness of the whole machine can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0014] In the figure: 1-revolution sensor A, 2-screw A, 3-revolution sensor B, 4-screw B, 5-deep groove ball bearing A, 6-motor stator, 7-motor winding, 8-motor rotor, 9-rear end cover, 10-deep groove ball bearing B, 11-inner gear ring of planetary reducer, 12-planet carrier, 13-output shaft of planetary reducer, 14-deep groove ball bearing C, 15-retaining ring for shaft, 16-clamp ring for hole, 17-gasket, 18-planetary gear, 19-sun gear. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0016] like Figure 1 As shown, the rotary sensor A1 and the rotary sensor B3 are connected together by screws A2, the rotary sensor B3 and the motor stator 6 are connected together by screws B4, and the motor rotor 8 and the inner gear ring 11 of the planetary reducer are connected together by screws C, which also plays the role of fixing the inner gear ring 11 of the planetary reducer; the motor rotor 8 is supported by deep groove ball bearings A5 and deep groove ball bearings B10, and the motor rotor 8 and the sun gear 19 are connected by interference fit and laser welding. A gasket 17 is used to separate the end face of the motor rotor 8 and the planetary gear 18 to prevent the planetary gear 18 and the motor rotor 8 from direct contact and wear. The power generated by the motor being energized is output to the sun gear 19 through the motor rotor 8, and the sun gear 19 meshes with the planetary gear 18 to realize power transmission. After the three-stage planetary reduction, it is output through the planetary reducer output shaft 13, and the planetary reducer output shaft 13 is supported by a deep groove ball bearing C14, and the deep groove ball bearing C14 is limited by a hole clamp ring 16 and a shaft clamp ring 15.

[0017] Furthermore, when the planetary gear transmission motor is powered on and running, the resolver sensor A1 and the resolver sensor B3 can provide the user with real-time feedback of the angle output by the motor, thereby achieving precise control of the motor.

[0018] Preferably, the planetary reducer inner ring gear 11 is embedded in the motor rotor 8, the planetary reducer output mode is NGW type, the sun gear 19 is input, the planetary reducer inner ring gear 11 is fixed, and the planet carrier 12 is output, wherein the motor winding 7 inside the motor adopts double winding, and the position sensor adopts double rotary transformer.

Claims

1. A planetary gear transmission motor, comprising a motor and a planetary reducer, characterized in that: The motor stator (6) of the motor is connected to a resolver sensor B (3) via a screw B (4), and the resolver sensor B (3) is connected to a resolver sensor A (1) via a screw A (2); the motor rotor (8) of the motor is connected to an inner gear ring (11) of a planetary reducer via a screw C, and the planetary reducer output shaft (13) of the planetary reducer is connected to a planetary gear (18) via a planet carrier (12); the planetary gear (18) is meshed with a sun gear (19), and the motor rotor (8) is connected to the sun gear (19).

2. The planetary gear transmission motor according to claim 1, characterized in that: A deep groove ball bearing A (5) and a deep groove ball bearing B (10) are provided at both ends of the motor rotor (8).

3. The planetary gear transmission motor according to claim 1, characterized in that: The motor rotor (8) and the sun gear (19) are connected by interference fitting and laser welding.

4. The planetary gear transmission motor according to claim 1, characterized in that: One end of the planetary reducer output shaft (13) is provided with a deep groove ball bearing C (14), a hole clamping ring (16) and a shaft retaining ring (15).

5. The planetary gear transmission motor according to claim 1, characterized in that: A gasket (17) is provided between the motor rotor (8) and the planetary gear (18).

6. The planetary gear transmission motor according to claim 1, characterized in that: The motor winding (7) of the motor adopts a double winding.

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