CN218000188U

CN218000188U - Elastic gland through type sliding bearing and bearing chamber elastic interference fit structure

Info

Publication number: CN218000188U
Application number: CN202222095152.7U
Authority: CN
Inventors: 聂鹏举; 邹高平; 曾利刚; 贺本文
Original assignee: Collier Electric Machinery Group Co ltd
Current assignee: Collier Electric Machinery Group Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-12-09
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses an elastic gland straight-through sliding bearing and bearing chamber elastic interference fit structure, relating to the micro motor manufacturing technical field, comprising an elastic gland 1, a bracket 2, a motor shaft 3 and a sliding bearing 6; the motor shaft 3 is arranged in an inner hole of the sliding bearing 6 in a penetrating way and is positioned by a shaft retainer ring 4 arranged on the motor shaft 3; a left step and a right step are respectively arranged at the left end and the right end of the sliding bearing 6, and elastic O-shaped rings 8 are respectively arranged on the left step and the right step; a large-end inner step and a small-end inner step which respectively correspond to the left step and the right step are arranged in a bearing hole of the bracket 2; the sliding bearing 6 is arranged in a bearing hole of the bracket 2 in a penetrating way. The motor has the characteristics of small vibration, low noise, convenient bearing installation and the like, and is suitable for various micro motors.

Description

Elastic gland through type sliding bearing and bearing chamber elastic interference fit structure

Technical Field

The utility model relates to a micro motor makes technical field, especially an elastic gland through type slide bearing and bearing room elasticity interference fit structure.

Background

In the prior art, a motor shaft and a single sliding bearing are simple in matching structure and high in cost performance, so that the motor shaft and the single sliding bearing are applied to a plurality of micro motors, and the outer cylindrical surface of the bearing and a bearing chamber are in interference fit. At normal temperature, the matched motor has no problem, but the motor is easy to cause problems when used in a high-temperature environment. With the continuous rise of the temperature of the bearing and the bearing chamber, the thermal expansion coefficients of the bearing and the bearing chamber are different due to different materials, and if the material of the bearing chamber is larger than the thermal expansion coefficient of the bearing, the original interference fit can be changed into over fit or even clearance fit, so that the bearing is loosened and fails. If the thermal expansion coefficient of the bearing chamber material is smaller than that of the bearing material, the original matching interference magnitude can become too large, so that the radial compression of the bearing is serious to cause the size of an inner hole to be reduced, and the matching state of the shaft and the inner hole of the bearing is changed to cause failure. Therefore, the prior art products require that the difference between the thermal expansion coefficients of the sliding bearing and the bearing chamber is small or the applicable environmental temperature range is small.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to solve the technical problem that a cooperation structure that coefficient of thermal expansion to slide bearing and bearing room material does not have strict requirement, and service environment temperature range is great is provided, has the characteristics that the vibration is little, the noise is low, bearing simple to operate with its supporting motor that uses.

In order to solve the technical problem, the utility model discloses the technical scheme who takes designs an elasticity gland through type slide bearing and bearing room elasticity interference fit structure: comprises an elastic gland 1, a bracket 2, a motor shaft 3 and a sliding bearing 6; the motor shaft 3 is arranged in an inner hole of the sliding bearing 6 in a penetrating way and is positioned by a shaft retainer ring 4 arranged on the motor shaft 3; a left step and a right step are respectively arranged at the left end and the right end of the sliding bearing 6, and elastic O-shaped rings 8 are respectively arranged on the left step and the right step; a large-end inner step and a small-end inner step which respectively correspond to the left step and the right step are arranged in the bearing hole of the bracket 2; the sliding bearing 6 is arranged in a bearing hole of the bracket 2 in a penetrating way and is positioned by an elastic gland 1 which is arranged at the opening end part of the bearing hole and reaches the inner step of the large end and the inner step of the small end; and the inner ring and the outer ring of the elastic O-shaped ring 8 form elastic interference fit with the outer cylindrical surface of the left step, the outer cylindrical surface of the right step and the inner hole surface of the bearing hole.

The elastic O-shaped ring 8 is a rubber O-shaped ring or a plastic O-shaped ring or other O-shaped rings made of elastic materials.

A bearing end adjusting washer 5 is also arranged between the shaft retainer ring 4 and the shaft end of the sliding bearing 6.

The utility model discloses an elasticity gland through type slide bearing and bearing room elasticity interference fit structure compare with the cooperation structure of current traditional motor slide bearing and bearing room, have following advantage:

1. the adverse effect of the matching state of the sliding bearing and the bearing chamber caused by temperature change can be compensated, the requirement on the consistency of the thermal expansion coefficients of the sliding bearing and the bearing chamber material is reduced, and the temperature of the use environment is wide and can reach-40 to 105 ℃;

2. because the adopted elastic O-shaped ring has good elasticity, the elastic O-shaped ring has the effects of reducing vibration and noise and can reduce the noise by 3-5dB.

3. The bearing is easy and convenient to press and is not easy to damage.

Drawings

Fig. 1 is a main sectional schematic view of the present invention;

fig. 2 is a schematic diagram of the local amplification of K of the present invention.

In the figure: the structure comprises an elastic gland 1, a support 2, a motor shaft 3, a shaft retainer 4, a bearing end adjusting washer 5, a sliding bearing 6, a stator winding assembly 7, an elastic O-shaped ring 8, a magnetic ring 9, an iron shell 10, a bearing end adjusting washer 11 and a shaft sleeve 12.

Detailed Description

The present invention will be further described with reference to the following examples. The following description is given by way of example, but the scope of the invention is not limited thereto.

The embodiment is as follows:

the embodiment is a motor applying a structure that an elastic gland straight-through sliding bearing is in elastic interference fit with a bearing chamber, and the motor comprises a stator assembly, a rotor assembly, a shaft retainer ring 4, a bearing end adjusting washer 5 and a bearing end adjusting washer 11.

The stator assembly consists of elastic gland 1, support 2, stator winding assembly 7 and sliding bearing 6.

The shaft hole is opened in the centre of slide bearing 6, and the both ends face is provided with the boss that reduces (be used for axial positioning and install clearance adjustment gasket additional) about, and the outer face of cylinder department of following these two bosses has processed left step and right step respectively to, all suit elasticity O type circle 8 on left step and right step, the inner circle of this elasticity O type circle 8 forms elasticity interference fit with the outer face of cylinder of left step and right step department.

The bracket 2 is a rotary body with a T-shaped section, a bearing hole (namely, a bearing chamber, shown in figure 1, is inclined leftwards) is arranged in the middle of the I-shaped part of the bracket, the aperture of the left end surface of the bearing hole is larger, and a buckle matched with the elastic gland 1 is arranged. Two-stage inner steps (namely, a left inner step on the left side and a right inner step on the right side) are also arranged in the bearing hole. The sliding bearing 6 is sleeved with the elastic O-shaped ring 8 and then is arranged in the bearing hole of the bracket 2 in a penetrating way, and at the left end of the sliding bearing, one part of the elastic gland 1 arranged at the opening end part of the bearing hole props against the left inner step, and the other part of the elastic gland props against the left side of the elastic O-shaped ring 8 sleeved on the left step, so that the left side of the sliding bearing 6 is positioned; at the right end, the right side of the elastic O-shaped ring 8 sleeved on the right step is propped against the right inner step to form right side positioning of the sliding bearing 6. And the outer ring of the elastic O-shaped ring 8 sleeved on the left step and the right step forms elastic interference fit with the inner hole surface of the bearing hole. The outer cylindrical surface of the sliding bearing 6 and the inner hole surface of the bearing hole can be in clearance fit, transition fit or interference fit (in this case, transition fit) according to specific product requirements. The elastic O-ring 8 is a rubber O-ring or a plastic O-ring or other O-ring made of elastic material.

The stator winding assembly 7 is sleeved on the outer cylindrical surface of the I-shaped part of the bracket 2.

The rotor assembly is composed of a motor shaft 3, an iron shell 10 and a magnetic ring 9.

The iron shell 10 is a thin-wall cylinder, a shaft sleeve 12 (with a shaft hole) is arranged in the middle of the right side of the iron shell, and the magnetic ring 9 is sleeved on the inner wall of the thin-wall cylinder.

The inner bore of the magnetic ring 9 in the rotor assembly is fitted over the stator winding assembly 7 (with a suitable clearance).

The motor shaft 3 is arranged in a shaft hole in the middle of the sliding bearing 6 in a penetrating way (clearance fit is usually adopted between the motor shaft and the sliding bearing), and the left part of the motor shaft is adjusted by a shaft retainer ring 4 and a bearing end part adjusting washer 5 to be in position with the left end of the sliding bearing 6 (namely, the left end is positioned); the right part of the shaft sleeve penetrates through the right end surface (namely, a right inner step) of the bearing hole and then penetrates into the shaft hole of the shaft sleeve 12 on the right side of the iron shell 10 (the right end of the motor shaft 3 and the shaft hole of the shaft sleeve 12 are in interference fit, or are bonded by glue, or are welded to form a whole); a bearing end adjusting washer 11 for adjusting the clearance is further provided between the right end surface of the sliding bearing 6 and the left end surface of the sleeve 12.

After assembly, the elastic O-shaped ring 8, the outer cylindrical surfaces of the left step and the right step of the sliding bearing 6 and the inner hole surface of the bearing hole form elastic interference fit, and the elastic interference can well compensate for the adverse effect of the change of the fit state caused by the change of the sizes of the outer circle of the sliding bearing 6 and the inner hole of the bearing hole of the bracket 2 due to temperature change. Meanwhile, the elasticity of the elastic O-shaped ring 8 can effectively absorb the vibration of the motor during operation, thereby reducing the noise of the motor.

The utility model discloses an elasticity gland through type slide bearing and bearing room elasticity interference fit structure are applicable to all kinds of micro motor.

Claims

1. A structure for elastic interference fit of an elastic gland straight-through sliding bearing and a bearing chamber comprises an elastic gland (1), a bracket (2), a motor shaft (3) and a sliding bearing (6); the motor shaft (3) is arranged in an inner hole of the sliding bearing (6) in a penetrating manner and is positioned by a shaft retainer ring (4) arranged on the motor shaft (3); the method is characterized in that: the left end and the right end of the sliding bearing (6) are respectively provided with a left step and a right step, and elastic O-shaped rings (8) are respectively arranged on the left step and the right step; a large-end inner step and a small-end inner step which respectively correspond to the left step and the right step are arranged in a bearing hole of the bracket (2); the sliding bearing (6) is arranged in a bearing hole of the bracket (2) in a penetrating way and is positioned by an elastic gland (1) which is arranged at the opening end part of the bearing hole and reaches the inner step of the large end and the inner step of the small end; and the inner ring and the outer ring of the elastic O-shaped ring (8) form elastic interference fit with the outer cylindrical surface of the left step, the outer cylindrical surface of the right step and the inner hole surface of the bearing hole.

2. The elastic gland through type sliding bearing and bearing chamber elastic interference fit structure according to claim 1, characterized in that: the elastic O-shaped ring (8) is a rubber O-shaped ring or a plastic O-shaped ring.

3. The elastic gland straight-through type sliding bearing and bearing chamber elastic interference fit structure according to claim 1 or 2, characterized in that: and a bearing end adjusting washer (5) is also arranged between the shaft retainer ring (4) and the shaft end of the sliding bearing (6).