CN216530942U

CN216530942U - Axial pre-tightening structure of motor

Info

Publication number: CN216530942U
Application number: CN202122708422.2U
Authority: CN
Inventors: 王达; 阎庆楠; 王帅; 曹博宇
Original assignee: Tianjin Aviation Mechanical and Electrical Co Ltd
Current assignee: Tianjin Aviation Mechanical and Electrical Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-05-13
Anticipated expiration: 2031-11-05

Abstract

The utility model relates to an axial pre-tightening structure of a motor. The structure comprises a shell, a pre-tightening spring, a front bearing baffle, a front bearing pressing plate, a fastening bolt, a bearing, a motor shaft and other parts. The front bearing is used as a moving end bearing, and forms a moving end structure together with the front bearing baffle, the front bearing pressing plate and the fastening bolt; the center of the front end of the shell is provided with through holes which are distributed in a circumferential manner and are used for the pre-tightening bolts to pass through, the floating end structure is connected with the shell through the pre-tightening bolts and can move along the axial direction, and the front end of the installed back shell is positioned between the front bearing baffle and the front bearing pressing plate; the rear bearing is a fixed end bearing, and the front bearing and the rear bearing are connected through a motor shaft; the shell is further provided with a counter bore for installing the pre-tightening spring, the counter bore is concentric with the pre-tightening bolt installation through hole, the opening of the counter bore faces the front end of the motor, two end faces of the pre-tightening spring after installation are respectively in contact with the front bearing pressing plate and the bottom of the counter bore, the pre-tightening spring generates elasticity and can pre-tighten the bearing and the bolt simultaneously, the structure is simple and compact, and the practicability is good.

Description

Axial pre-tightening structure of motor

Technical Field

The present disclosure relates to the field of structural design, and in particular, to an axial pre-tightening structure of a motor.

Background

In the prior similar technology, the pre-tightening of the bearing and the pre-tightening of the bolt are not coupled;

in the prior art, most of elastic bodies directly act on the bearing, and more additional parts are needed for assistance, so that the space is occupied to a certain extent.

Disclosure of Invention

The utility model aims to provide an axial pre-tightening structure of a motor, which is simple and compact in structure and good in practicability.

The technical scheme of the utility model is as follows: an axial pre-tightening structure of a motor comprises a moving end structure 1, a pre-tightening spring 2, a rotating shaft 3, a fixed end bearing compression ring 4, a shell 5, a fixed end structure 6 and an elastic retainer ring 7; the fastening screw 14 in the floating end structure 1 is arranged in a through hole 51 at the front end of the shell 5, and the floating end bearing baffle 12 and the floating end bearing pressure plate 13 of the floating end structure 1 are respectively positioned at two sides of the shell 5; a floating end bearing 11 and an elastic retainer ring 7 in the floating end structure 1 are arranged at one end of the rotating shaft 3; a fixed end bearing 61 and a fixed end bearing clamping ring 4 of the fixed end structure 6 are sequentially arranged at the other end of the rotating shaft 3; the fixed end structure 6 is fixedly connected with the rear end of the shell 5.

The floating end structure 1 further comprises a floating end bearing bush 15; the floating end bearing 11 is positioned between the floating end bearing baffle 12 and the floating end bearing pressing plate 13, and the fastening screw 14 passes through the floating end bearing baffle 12 and the through hole 51 at the front end of the shell 5 to be in threaded connection with the floating end bearing pressing plate 13; the floating end bearing bush 15 is mounted in a bearing mounting hole 53 at the front end of the housing 5.

The fixed end structure 6 further comprises a fixed end bearing bush 62, a fastening bolt 63 and a fixed end bearing pressure plate 64; the fixed end bearing bush 62 is mounted in the bearing mounting hole 54 at the rear end of the housing 5; the fastening bolt 63 is threaded to the fixed end bearing retainer 64 through the through holes of the housing 5 and the fixed end bearing bush 62.

The shell 5 is further provided with a counter bore 52 for installing the pre-tightening spring 2, the counter bore is concentric with the pre-tightening bolt installation through hole 51, the opening of the counter bore faces the front end of the motor, and two end faces of the pre-tightening spring 2 are respectively contacted with the bottom of the moving end bearing baffle 12 and the counter bore 52 after installation.

The fixed end bearing bush 62 is of a cylindrical structure, the section of the fixed end bearing bush is in a shape like a Chinese character 'ji', and the upper end face of the fixed end bearing bush is provided with a mounting hole 621 of the fixed end bearing press ring 4; through holes 622 for the fastening bolts 63 to pass through are formed on both sides of the lower end.

The distance between the floating end bearing baffle 12 and the shell 5 is 0.5-1.5 mm.

The utility model has the following beneficial effects:

the pretightening spring generates elasticity to simultaneously pretighten the floating end bearing, the fastening screw and the fixed end bearing, the type selection range of the fastening screw is more, and more space can be saved by preferably selecting the countersunk head screw;

the mounting position of the spring fully utilizes the existing space of the shell, additional parts are not needed, and the structure is more compact, simple and reliable;

the bearing end design is more flexible since the preload elements do not need to be applied directly to the ends.

In addition to the above objects, features and advantages, there are other objects, features and advantages. The present invention will be described in detail below with reference to the accompanying drawings.

Drawings

The drawings are provided to facilitate further understanding of the utility model, and the exemplary embodiments and descriptions of the utility model are provided to explain the utility model and do not constitute a limitation of the utility model. In the drawings:

FIG. 1 is a schematic diagram of a motor pre-tightening scheme according to the present invention;

FIG. 2 is a schematic diagram of a floating end structure in a motor pre-tightening scheme;

FIG. 3 is a schematic view of a structure of a fixed end in a motor pre-tightening scheme;

FIG. 4 is a schematic view of a housing feature;

FIG. 5 is a schematic view of a stationary end bearing cartridge feature.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-3, an axial pre-tightening structure of a motor includes a moving end structure 1, a pre-tightening spring 2, a rotating shaft 3, a fixed end bearing compression ring 4, a housing 5, a fixed end structure 6 and an elastic retainer ring 7; the fastening screw 14 in the floating end structure 1 is arranged in a through hole 51 at the front end of the shell 5, and the floating end bearing baffle 12 and the floating end bearing pressure plate 13 of the floating end structure 1 are respectively positioned at two sides of the shell 5; a floating end bearing 11 and an elastic retainer ring 7 in the floating end structure 1 are arranged at one end of the rotating shaft 3; the fixed end bearing 61 and the fixed end bearing clamping ring 4 of the fixed end structure 6 are sequentially arranged at the other end of the rotating shaft 3; the fixed end structure 6 is fixedly connected with the rear end of the shell 5.

The floating end structure 1 further comprises a fastening screw 14 and a floating end bearing bush 15; the floating end bearing 11 is positioned between the floating end bearing baffle 12 and the floating end bearing pressing plate 13, and the fastening screw 14 penetrates through the floating end bearing baffle 12 and is in threaded connection with the floating end bearing pressing plate 13; the floating end bearing bush 15 is mounted in a bearing mounting hole at the front end of the housing 5.

The fixed end structure 6 further comprises a fixed end bearing bush 62, a fastening bolt 63 and a fixed end bearing pressure plate 64; the fixed end bearing bush 62 is mounted in a bearing mounting hole at the rear end of the shell 5; the fastening bolt 63 is threaded to the fixed end bearing retainer 64 through the through holes of the housing 5 and the fixed end bearing bush 62.

The fixed end bearing bush 62 is of a cylindrical structure, the section of the fixed end bearing bush is in a shape like a Chinese character 'ji', and the upper end face of the fixed end bearing bush is provided with a mounting hole of the fixed end bearing press ring 4; through holes for the fastening bolts 63 to pass through are arranged on two side edges of the lower end.

The pre-tightening spring 2 generates elastic force to pre-tighten the floating end bearing 11, the fastening screw 14 and the fixed end bearing 61 at the same time.

The above embodiment is one of the preferred embodiments of the present invention, and is not intended to limit the present invention, and many modifications and variations may occur to those skilled in the art or close thereto. Any non-inventive changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be considered within the scope of the utility model.

Claims

1. The utility model provides an axial pretension structure of motor which characterized in that: the device comprises a moving end structure (1), a pre-tightening spring (2), a rotating shaft (3), a fixed end bearing ring (4), a shell (5), a fixed end structure (6) and an elastic retainer ring (7); a fastening screw (14) in the floating end structure (1) is arranged in a through hole (51) at the front end of the shell (5), and a floating end bearing baffle plate (12) and a floating end bearing pressure plate (13) of the floating end structure (1) are respectively positioned at two sides of the shell (5); a floating end bearing (11) and an elastic retainer ring (7) in the floating end structure (1) are arranged at one end of the rotating shaft (3); a fixed end bearing (61) and a fixed end bearing ring (4) of the fixed end structure (6) are sequentially arranged at the other end of the rotating shaft (3); the fixed end structure (6) is fixedly connected with the rear end of the shell (5).

2. An axial pretensioning structure of an electrical machine according to claim 1, characterized in that: the floating end structure (1) also comprises a floating end bearing bush (15); the floating end bearing (11) is positioned between the floating end bearing baffle plate (12) and the floating end bearing pressure plate (13), and the fastening screw (14) penetrates through the floating end bearing baffle plate (12) to be in threaded connection with the floating end bearing pressure plate (13); the floating end bearing bush (15) is arranged in a bearing mounting hole at the front end of the shell (5).

3. An axial pretensioning structure of an electrical machine according to claim 1, characterized in that: the fixed end structure (6) also comprises a fixed end bearing bush (62), a fastening bolt (63) and a fixed end bearing pressure plate (64); the fixed end bearing bush (62) is arranged in a bearing mounting hole at the rear end of the shell (5); the fastening bolt (63) passes through the through holes on the shell (5) and the fixed end bearing bush (62) and is in threaded connection with the fixed end bearing pressure plate (64).

4. An axial pretensioning structure of an electrical machine according to claim 1, characterized in that: the shell (5) is further provided with a counter bore (52) for installing the pre-tightening spring (2), the counter bore is concentric with the pre-tightening bolt installation through hole (51), the opening of the counter bore faces the front end of the motor, and two end faces of the pre-tightening spring (2) are respectively in contact with the floating end bearing baffle (12) and the bottom of the counter bore (52) after installation.

5. An axial pretensioning structure of an electrical machine according to claim 3, characterized in that: the fixed end bearing bush (62) is of a cylindrical structure, the section of the fixed end bearing bush is in a shape like a Chinese character 'ji', and the upper end face of the fixed end bearing bush is provided with a mounting hole of the fixed end bearing ring (4); through holes for the fastening bolts (63) to pass through are arranged on two side edges of the lower end.

6. An axial pretensioning structure of an electrical machine according to claim 1, characterized in that: after the installation is finished, the distance between the floating end bearing baffle (12) and the shell (5) is 0.5-1.5 mm.