Deceleration motor device

Abstract

The invention discloses a deceleration motor device. The deceleration motor device comprises a rotating shaft and an electromagnetic unit provided with a stator and a rotor and further comprises a single-stage type planet gear unit integrated on the rotor. The single-stage type planet gear unit is provided with a planet gear disc fixedly sleeved on the rotating shaft, a plurality of planet gears pivoted on the planet gear disc, an outer gear ring meshed with the planet gears and sun gears fixedly arranged on the rotor and meshed with the planet gears. According to the deceleration motor device disclosed by the invention, the sun gears are directly sleeved on the rotor, with the help of the single rotating shaft, the axle distance of the integral device is shortened; and the assembly precision among the parts can be further ensured.

Description

technical field [0001] The invention relates to a geared motor device, in particular to a thinned geared motor device. Background technique [0002] In the application fields such as electric tools and power drives, the reduction motor device integrated with planetary gear set can greatly reduce the size of the motor because of its high reduction ratio design, so as to achieve the purpose of high power and high torque at the same time. [0003] However, most of the reduction motor devices integrated with planetary gear sets on the market still adopt the design of the separation of the gear set and the internal motor, and generally use radial air gap motors, so the length of the shaft will be too long, and the It cannot be applied to occasions with strict restrictions on the axial installation space, or the design of special requirements. [0004] For example, U.S. Patent No. 5,123,300 discloses a phase adjustment mechanism integrating a disc motor and a planetary gear set t...

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Problems solved by technology

[0003] However, most of the reduction motor devices integrated with planetary gear sets on the market still adopt the design of the separation of the gear set and the internal motor, and generally use radial air gap motors, so the length of the shaft will be too long, and the It cannot be applied to occasions with strict restrictions on the axial installation space, or the design of special requirements

[0004] For example, U.S. Patent No. 5,123,300 discloses a phase adjustment mechanism integrating a disc motor and a planetary gear set to adjust the phase of the output shaft and the input shaft. The phase adjustment mechanism adopts the existing split shaft and The design of the separated gears leads to the overall deficiencies of the geared motor device in terms of axial length and alignment precision between components.

In order to improve the problem of poor alignment accuracy, the industry has also developed many corresponding technologies. For example, US Patent No. 6,966,391 discloses a design that can improve the alignment accuracy of the front and rear axles. However, due to the motor shaft and the final The rotational speeds of the output shafts are different, so the high-precision design of a single through-shaft has not yet been achieved, and the design of the related shaft seal structure must become quite complicated (such as US Patent No. 7,182,709)

[0005] However, the existing reduction motor device integrated with planetary gear sets has a lot of room for further improvement in terms of axial size and precision between components.

[0006] It can be seen that the above-mentioned existing reduction motor device integrated with planetary gear sets obviously still has inconvenience and defects in structure, method and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure and method for general products and methods to solve the above-mentioned problems. This is obviously a problem that relevant industry players are eager to solve

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