Hollow cup hub motor structure for commercial cleaning robot

Abstract

The utility model discloses a hollow cup wheel hub motor structure for a commercial cleaning robot, which comprises a wheel hub assembly, a stator assembly and a rotor assembly are arranged in the wheel hub assembly, a sun gear is arranged on the rotor assembly, a planet gear meshed with the sun gear is arranged on the outer side of the sun gear, and an inner gear ring is arranged on the inner side, close to the planet gear, of the wheel hub assembly. The beneficial effects of the utility model are that the hollow cup stator structure is adopted to reduce the weight of the motor, improve the overall efficiency, have good heat dissipation performance and long service life, and improve the cruising ability of the whole machine; a planetary gear system is adopted, a first-stage planetary gear system is additionally arranged at the output end of the motor, the output torque is increased through transmission of planetary gears, and the loading capacity is improved; and an efficient motor control system is adopted, stable operation of the motor is ensured in cooperation with the efficient motor control system, accurate control over the motor is achieved, and the energy efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub motors, in particular to a hollow cup wheel hub motor structure for a commercial cleaning robot. Background Art

[0002] The hub motor technology is also known as in-wheel motor technology. Its biggest feature is that the power, transmission and braking devices are integrated into the wheel hub, thus greatly simplifying the mechanical part of the electric vehicle.

[0003] With the rapid development of commercial robots, the requirements for hub motors are also increasing. Traditional hub motors have certain limitations in size, weight and load capacity, so a new design is needed to solve these problems. Utility Model Content

[0004] The purpose of the utility model is to provide a hollow cup hub motor structure for a commercial cleaning robot to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a hollow cup hub motor structure for a commercial cleaning robot, comprising a hub assembly, wherein a stator assembly and a rotor assembly are arranged inside the hub assembly, a sun gear is arranged on the rotor assembly, a planetary gear meshingly connected to the sun gear is arranged on the outer side of the sun gear, and an inner gear ring is arranged on the inner side of the hub assembly close to the planetary gear.

[0007] Furthermore, the stator assembly includes an iron core yoke and a plastic bracket, and a winding is wound on the plastic bracket.

[0008] Furthermore, the hub assembly is made of aluminum casting, and the inner diameter of the hub assembly is interference fit with the inner gear ring.

[0009] Furthermore, the rotor assembly includes a drive shaft, a flat key is provided on the drive shaft, and a magnetic encoder is also provided at one end of the drive shaft.

[0010] Furthermore, a planet carrier is provided on one side of the planetary gear, the planet carrier is sleeved on the driving shaft, and the planetary gear is meshingly connected with the inner gear ring.

[0011] Furthermore, a C-shaped retaining ring and an elastic retaining ring for the shaft are respectively provided at both ends of the planet carrier.

[0012] Furthermore, the inner gear ring mounting portion is fixedly connected to the hub assembly via a step, and a stop groove is provided on the inner gear ring.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] 1. Use hollow cup stator structure: Use hollow cup stator structure to reduce the weight of the motor, improve the overall efficiency, have good heat dissipation performance and service life, and improve the endurance of the whole machine;

[0015] 2. Adopt planetary gear system: add a first-stage planetary gear system at the output end of the motor, and increase the output torque and load capacity through the transmission of planetary gears;

[0016] 3. Adopt efficient motor control system: With efficient motor control system, ensure stable operation of the motor, realize precise control of the motor and improve system energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the stator assembly of the utility model.

[0019] Reference numerals

[0020] 1-hub assembly, 2-stator assembly, 21-core yoke, 22-plastic bracket, 23-winding, 3-rotor assembly, 31-drive shaft, 32-magnetic encoder, 4-sun gear, 5-planetary gear, 6-inner ring gear, 7-planet carrier. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] Example

[0023] like Figure 1-2 As shown, a hollow cup hub motor structure for a Shangqing robot includes a hub assembly 1, in which a stator assembly 2 and a rotor assembly 3 are arranged, the rotor assembly 3 is provided with a sun gear 4, the sun gear 4 is provided with a planetary gear 5 meshingly connected to the sun gear 4 on the outer side, and an inner gear ring 6 is provided on the inner side of the hub assembly 1 near the planetary gear 5.

[0024] The stator assembly 2 includes an iron core yoke 21 and a plastic bracket 22, on which a winding 23 is wound. The stator assembly 2 is composed of the plastic bracket 22 and the iron core yoke 21. After the winding and the plastic bracket 22 are wound, they are pressed onto the iron core and the shaft.

[0025] The hub assembly 1 is made of aluminum casting, and the inner diameter of the hub assembly 1 is interference fit with the inner gear ring 6. The inner gear ring 6 adopts a rotation-stop groove design, and the inner gear ring cuts aluminum to achieve rotation-stop.

[0026] The rotor assembly 3 includes a drive shaft 31, on which a flat key is provided. A magnetic encoder 32 is also provided at one end of the drive shaft 31. The rotor assembly 3 is guided and installed with the stator assembly 2 through two bearings to ensure concentricity and avoid the problem of unilateral installation of the iron core without guidance when the motor is installed, which leads to the installation offset of the magnetic iron core. The shaft is fixed externally with an elastic retaining ring.

[0027] A planet carrier 7 is provided on one side of the planetary gear 5, and the planet carrier 7 is sleeved on the driving shaft 31. The planetary gear 5 is meshed and connected with the inner gear ring 6. C-shaped retaining rings and elastic retaining rings for the shaft are respectively provided at both ends of the planet carrier 7. After the sun gear 4 and the planetary gear 5 are driven by the stator assembly 2 and the rotor assembly 3, the hub assembly 1 equipped with the inner gear ring 6 is driven to rotate, which effectively solves the problem of poor load-bearing capacity of the hollow cup motor.

[0028] The mounting part of the inner gear ring 6 is fixedly connected to the wheel hub assembly 1 via a step. The design structure of the step increases the strength of the parts at the mounting part of the inner gear ring, reduces the deformation produced during the press-fitting process, ensures the concentricity of the parts, and has a stop groove on the inner gear ring 6.

[0029] The utility model adopts the hollow cup stator process, and the rotor is driven by the permanent magnet. The sun gear 4 drives the hub assembly 1 equipped with the inner ring gear 6, optimizes the motor power density and installation process, reduces the volume of the iron core and the magnetic steel, reduces the iron loss of the iron core, and adds a reduction mechanism to solve the problem of poor load capacity of the hollow cup stator assembly 2. The use of a planetary reduction mechanism with a reduction ratio of i can reduce the volume of i-1 / i, which saves volume and cost.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A hollow cup hub motor structure for a commercial robot, comprising a hub assembly (1), characterized in that: The hub assembly (1) is provided with a stator assembly (2) and a rotor assembly (3), the rotor assembly (3) is provided with a sun gear (4), the sun gear (4) is provided with a planetary gear (5) meshingly connected thereto on the outer side, the hub assembly (1) is provided with an inner gear ring (6) on the inner side close to the planetary gear (5), the stator assembly (2) comprises an iron core yoke (21) and a plastic bracket (22), a winding (23) is wound on the plastic bracket (22), the hub assembly (1) is made of aluminum casting, and the inner diameter of the hub assembly (1) is interference fit with the inner gear ring (6) The rotor assembly (3) comprises a drive shaft (31), a flat key is provided on the drive shaft (31), a magnetic encoder (32) is also provided at one end of the drive shaft (31), a planet carrier (7) is provided on one side of the planetary gear (5), the planet carrier (7) is sleeved on the drive shaft (31), the planetary gear (5) is meshingly connected with the inner gear ring (6), a C-shaped retaining ring and a shaft elastic retaining ring are respectively provided at both ends of the planetary carrier (7), the mounting portion of the inner gear ring (6) is fixedly connected to the hub assembly (1) via a step, and the inner gear ring (6) has a rotation-stopping groove.

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