CN219046458U

CN219046458U - Ultrathin direct-current torque motor structure

Info

Publication number: CN219046458U
Application number: CN202221142681.1U
Authority: CN
Inventors: 王东立
Original assignee: Hebei Yujie Motor Technology Co ltd
Current assignee: Hebei Yujie Motor Technology Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2023-05-19
Anticipated expiration: 2032-05-13

Abstract

The utility model discloses an ultrathin direct current torque motor structure, which comprises a stator assembly and a rotor assembly which are arranged in a machine shell, wherein the machine shell comprises an inner shaft bottom cover and an outer vertical cover which are assembled and installed to form an inner space, the stator assembly and the rotor assembly are arranged in the inner space, and the stator assembly is arranged on an outer ring of the rotor assembly; the output turntable of the rotor assembly is provided with an inner ring plate which protrudes, and the inner ring plate is matched with the annular end cover to close the opening of the inner space. In the ultrathin direct current torque motor structure, the design of the rear end cover and the bearing seat part of the motor in the existing structure is omitted through the inner shaft bottom cover of the integrated structure, the installation structure of the motor is simple and convenient, the output torque of the motor is enabled to be larger, and the ultrathin direct current torque motor structure is particularly suitable for occasions with high precision, limited installation height and requirement on occupied space.

Description

Ultrathin direct-current torque motor structure

Technical Field

The utility model relates to a motor structure, in particular to an ultrathin direct current torque motor structure.

Background

Along with the expansion of the application field of the motor, some devices have different requirements on the motor, for example, some occasions need a large output torque of the motor, but have severe requirements on the installation space, for example, the motor is required to be as thin as possible, and at this time, a novel motor structure with short axial distance and output torque still meeting the field requirement needs to be developed.

Disclosure of Invention

The utility model provides an ultrathin direct current torque motor structure aiming at the defects of the prior art.

The ultrathin direct current torque motor structure comprises a stator assembly and a rotor assembly which are arranged in a machine shell, wherein the machine shell comprises an inner shaft bottom cover and an outer vertical cover which are assembled and installed to form an inner space, the stator assembly and the rotor assembly are arranged in the inner space, and the stator assembly is arranged on an outer ring of the rotor assembly;

the output turntable of the rotor assembly is provided with an inner ring plate which protrudes, and the inner ring plate is matched with the annular end cover to close the opening of the inner space.

In the ultrathin direct current torque motor structure, the inner shaft bottom cover comprises a circular ring bottom cover and an inner shaft vertical wall vertically protruding from the inner edge of the circular ring bottom cover;

the outer vertical cover is vertically arranged on the outer edge of the circular bottom cover;

the inner space is formed among the outer vertical cover, the inner shaft vertical wall and the circular bottom cover;

the stator assembly is fixedly arranged on the inner wall of the outer vertical cover.

In the ultrathin direct current torque motor structure, a groove is formed in one side of the circular bottom cover, which is located in the inner space, and an encoder assembly is arranged in the groove.

In the ultrathin direct current torque motor structure, the outer vertical cover is provided with the wire outlet connector which is vertically led out.

The ultrathin direct current torque motor structure also comprises a bearing sleeved on the vertical wall of the inner shaft;

the rotor magnetic pole of the rotor assembly is fixedly arranged on the large diameter of the bearing;

the inner ring plate of the output turntable is provided with an installation table which is concave in the inner space, and the installation table is fixedly arranged on the rotor magnetic pole and is propped against the large diameter of the bearing.

The ultrathin direct current torque motor structure also comprises a fastening nut which is arranged at the end head of the inner shaft vertical wall and is used for propping and fixing the bearing.

In the ultrathin direct current torque motor structure, the bearing comprises an outer bearing and an inner bearing which are arranged side by side, and a retainer ring is arranged between the inner bearing and the outer bearing;

the inner edge of the rotor magnetic pole protrudes towards the inner bearing and is clamped against the large diameter of the inner bearing.

In the ultrathin direct current torque motor structure, the design of the rear end cover and the bearing seat part of the motor in the existing structure is omitted through the inner shaft bottom cover of the integrated structure, the installation structure of the motor is simple and convenient, the output torque of the motor is enabled to be larger, and the ultrathin direct current torque motor structure is particularly suitable for occasions with high precision, limited installation height and requirement on occupied space.

Drawings

FIG. 1 is a schematic cross-sectional view of an ultra-thin DC torque motor according to the present utility model;

FIG. 2 is a schematic diagram of an ultra-thin DC torque motor according to the present utility model;

fig. 3 is another schematic diagram of the ultra-thin dc torque motor structure according to the present utility model.

Detailed Description

The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.

As shown in fig. 1, 2 and 3, the ultra-thin dc torque motor structure according to the present utility model includes a stator assembly 3 and a rotor assembly 4 disposed in a casing 1.

The casing 1 specifically includes an inner shaft bottom cover 2 and an outer standing cover 11 that are assembled and form an inner space 5, the stator assembly 3 and the rotor assembly 4 are disposed in the inner space 5, and the stator assembly 3 is disposed on an outer ring of the rotor assembly 4. The ultra-thin dc torque motor structure further comprises a ring end cover 6 mounted at the end of the outer vertical cover 11, the output turntable 40 of the rotor assembly 4 has a protruding inner ring plate 41, and the inner ring plate 41 cooperates with the ring end cover 6 to close the opening of the inner space 5, so that the stator assembly 3 and the rotor assembly 4 in the inner space 5 are not exposed.

In the ultrathin direct-current torque motor structure, the rear end cover and the fixed shaft in the existing motor structure are designed into a whole (namely, the rear end cover and the fixed shaft correspond to the inner shaft bottom cover 2 in the utility model), so that the design of the rear end cover and the bearing seat part of the motor in the existing structure is omitted, the installation structure of the motor is simple and convenient, the output torque of the motor is larger, and the ultrathin direct-current torque motor structure is particularly suitable for occasions with high precision, limited installation height and space occupation requirements.

In the ultra-thin dc torque motor structure of the present utility model, the inner shaft bottom cover 2 specifically includes a circular ring bottom cover 21 and an inner shaft vertical wall 22 protruding vertically from the inner edge of the circular ring bottom cover 21; the outer vertical cover 11 is vertically installed on the outer edge of the circular bottom cover 21; the inner space 5 is formed among the outer vertical cover 11, the inner vertical wall 22 and the circular bottom cover 21; the stator assembly 3 is fixedly mounted on the inner wall of the outer vertical cover 11.

In order to facilitate the installation of the encoder assembly 7, a groove 23 is further formed on one side of the circular bottom cover 21, which is located in the inner space 5, and the encoder assembly 7 is arranged in the groove 23. The outer vertical cover 11 is also provided with a wire outlet joint 8 which is vertically led out.

The ultrathin direct-current torque motor structure also comprises a bearing 81 sleeved on the inner shaft vertical wall 22. The rotor poles 42 of the rotor assembly 4 are fixedly mounted on the large diameter (i.e., bearing outer race) of the bearing 81. The inner ring plate 41 of the output turntable 40 has a mounting table 44 recessed in the inner space 5, and the mounting table 44 is fixedly provided on the rotor magnetic pole 42 by bolts 82 and abuts against the large diameter of the bearing 81. In order to prevent displacement of the bearing 81, a tightening nut 43 for fixing the bearing 81 against is also provided at the end of the inner shaft standing wall 22. The bearing 81 in the present utility model may specifically include an outer bearing 84 and an inner bearing 83 disposed side by side, and a retainer ring 9 is disposed between the inner bearing 83 and the outer bearing 84; the inner edge 45 of the rotor pole 42 protrudes toward the inner bearing 83 and is engaged with the large diameter of the inner bearing 83.

In actual manufacturing, the mounting table 85 is formed on the inner side wall of the inner shaft vertical wall 22, the inner bearing 83, the retainer ring 9 and the outer bearing 84 are sequentially arranged at the mounting table 85 after the rotor magnetic pole 42 is arranged, then the fastening nut 43 is screwed, so that the inner rings of the inner bearing 83 and the outer bearing 84 can be pressed and fixed, and meanwhile, the inner edge 45 of the rotor magnetic pole 42 is also clamped against the outer ring of the inner bearing 83. Then, the mounting table 44 of the output turntable 40 is fixed to the rotor pole 42 by bolts 82, and at this time, the mounting table 44 is engaged with the bearing outer ring of the outer bearing 84, and the inner ring plate 41 cooperates with the ring end cap 6 to close the opening of the inner space 5.

Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. The ultrathin direct current torque motor structure comprises a stator assembly and a rotor assembly which are arranged in a machine shell, and is characterized in that the machine shell comprises an inner shaft bottom cover and an outer vertical cover which are assembled and installed to form an inner space, the stator assembly and the rotor assembly are arranged in the inner space, and the stator assembly is arranged on an outer ring of the rotor assembly;

2. The ultra-thin dc torque motor construction as recited in claim 1, wherein said inner shaft bottom cover includes a circular ring bottom cover and an inner shaft vertical wall projecting vertically from an inner edge of said circular ring bottom cover;

3. The ultra-thin dc torque motor structure as recited in claim 2, wherein a recess is formed in a side of the circular bottom cover located in the inner space, and an encoder assembly is disposed in the recess.

4. The ultra-thin dc torque motor structure as recited in claim 2, wherein the outer vertical cover is provided with a vertically led-out wire outlet connector.

5. The ultra-thin dc torque motor structure according to claim 2, further comprising a bearing fitted over the inner shaft wall;

6. The ultra-thin dc torque motor structure as recited in claim 5, further comprising a tightening nut disposed at the end of the inner shaft wall for holding the bearing against.

7. The ultra-thin dc torque motor structure as recited in claim 5, wherein the bearing comprises an outer bearing and an inner bearing arranged side by side, a retainer ring being arranged between the inner bearing and the outer bearing;