阅读说明：本技术 一种双侧夹紧式电机自锁机构及自锁电机 (Bilateral clamping type motor self-locking mechanism and self-locking motor ) 是由 甘建华 沈杰 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种双侧夹紧式电机自锁机构及自锁电机,包括转轴(1),转轴(1)上设有滚珠轴承(2),滚珠轴承(2)的外侧连接有挤压部,滚珠轴承(2)的内环(201)和外环(202)受挤压部挤压后分别对滚珠(203)施加轴向的压紧力。本发明通过滚珠轴承中的滚珠在受到轴向压力后与内环和外环相互贴合形成的摩擦阻力,实现对转轴的自锁效果,从而降低电机在工作过程中的发热温度,并具有结构简单、自锁稳定性好的特点。(The invention discloses a double-side clamping type motor self-locking mechanism and a self-locking motor, which comprise a rotating shaft (1), wherein a ball bearing (2) is arranged on the rotating shaft (1), the outer side of the ball bearing (2) is connected with an extrusion part, and an inner ring (201) and an outer ring (202) of the ball bearing (2) are respectively extruded by the extrusion part and then respectively apply axial pressing force to a ball (203). According to the invention, the self-locking effect on the rotating shaft is realized through the friction resistance formed by the mutual fit of the balls in the ball bearing with the inner ring and the outer ring after the balls are subjected to axial pressure, so that the heating temperature of the motor in the working process is reduced, and the self-locking device has the characteristics of simple structure and good self-locking stability.)

1. The utility model provides a two side clamp type motor self-locking mechanism which characterized in that: the pressing device comprises a rotating shaft (1), wherein a ball bearing (2) is arranged on the rotating shaft (1), an extrusion part is connected to the outer side of the ball bearing (2), and axial pressing force is respectively applied to a ball (203) after an inner ring (201) and an outer ring (202) of the ball bearing (2) are extruded by the extrusion part.

2. The double-side clamping type motor self-locking mechanism according to claim 1, characterized in that: the inner ring (201) of the ball bearing (2) and the outer ring (202) of the ball bearing (2) are arranged opposite to each other in the pressing direction of the balls (203).

3. The double-side clamping type motor self-locking mechanism according to claim 1, characterized in that: the number of the ball bearings (2) is two, and the two ball bearings (2) are respectively arranged on the left side and the right side of the rotating shaft (1); the extrusion portion comprises a first extrusion group and a second extrusion group, and the first extrusion group and the second extrusion group correspond to the two ball bearings (2) respectively.

4. The double-side clamping type motor self-locking mechanism according to claim 3, characterized in that: the first extrusion group comprises a cover plate (3) and a first extrusion surface (101) located on the rotating shaft (1), the cover plate (3) is attached to an outer ring (202) on one side of the ball bearing (2), and the first extrusion surface (101) is attached to an inner ring (201) on the other side of the ball bearing (2).

5. The double-side clamping type motor self-locking mechanism according to claim 4, characterized in that: and an elastic sheet (4) is arranged at the joint of the cover plate (3) and the ball bearing (2).

6. The double-side clamping type motor self-locking mechanism according to claim 5, characterized in that: the inner side of the cover plate (3) is provided with a groove (301) which is connected with the ball bearing (2) in a buckling mode, the elastic sheet (4) is arranged on the inner end face of the groove (301), and one side of the elastic sheet (4) is attached to the outer ring (202) of the ball bearing (2) mutually.

7. The double-side clamping type motor self-locking mechanism according to claim 3, characterized in that: the second extrusion group comprises an extrusion plate (5) and a second extrusion surface (102) located on the rotating shaft (1), the extrusion plate (5) is attached to an outer ring (202) on one side of the ball bearing (2), and the second extrusion surface (102) is attached to an inner ring (201) on the other side of the ball bearing (2).

8. A self-locking motor is characterized in that: the self-locking motor comprises the self-locking mechanism of the double-side clamping type motor.

9. The self-locking motor of claim 8, wherein: including electric motor rotor (6), pivot (1) is connected to the inboard of electric motor rotor (6), ball bearing (2) set up in the both sides of electric motor rotor (6), and the outside of electric motor rotor (6) is equipped with casing (7), apron (3) and stripper plate (5) are located the both ends of casing (7) respectively, and the outside of stripper plate (5) is equipped with turbine box (8), and pivot (1) one end is passed stripper plate (5) and is extended to in turbine box (8).

10. The self-locking motor of claim 9, wherein: the turbine box body (8) and the cover plate (3) are buckled with two ends of the shell (7) and are connected with the two ends of the shell through bolts.

Technical Field

The invention relates to a motor self-locking mechanism, in particular to a double-side clamping type motor self-locking mechanism and a self-locking motor.

Background

The motor used for lifting equipment such as tables, sickbeds and the like can bear larger pressure in a load state, so that an output shaft in the motor can be stressed to form relative rotation in a static and power-off state, namely, the equipment falls reversely and cannot be kept unchanged at a specified height. In order to avoid the above problems, such motors need to have a self-locking function.

At present, motor self-locking structures on the market are divided into two types, one type is that the self-locking function is realized by a spring structure, for example, in 200910160955.2 transmission mechanism with a speed reduction function, a guide screw is tightly clamped and clamped when the guide screw rotates reversely through the matching of an equal claw arm, a roller pin, an intermediary ring and a spiral spring type isolator, so that the rotation of the guide screw is avoided, and the self-locking effect is achieved. However, the self-locking structure has a complex structure and more parts, so that the production and assembly costs of the motor are increased; the overall space size of the motor is also increased.

Another self-locking structure is to realize the self-locking function through a shaft sleeve made of plastic material, for example, in patent 201920024505.X, a motor and lifting table, an elastic sleeve in a static state is arranged between a cover body and an output shaft, so that the inner side of the elastic sleeve and the output shaft can form static friction force; therefore, the output shaft can rotate the motor only by overcoming the static friction force applied by the elastic sleeve, and the self-locking effect is achieved. On one hand, the self-locking structure has the problem of friction overheating at the position of the elastic sleeve along with the rotation of the motor, and certain potential safety hazard exists; on the other hand, the elastic sleeve made of plastic can deform or expand due to heat after being heated for a long time, so that the clamping stagnation of the output shaft or the failure of the elastic sleeve are caused, and the rotation stability and the self-locking effect of the motor are reduced.

Therefore, the existing self-locking motor has the problems of complex structure, high working temperature and poor self-locking stability.

Disclosure of Invention

The invention aims to provide a double-side clamping type motor self-locking mechanism and a self-locking motor. The self-locking type motor can reduce the heating temperature of the motor in the working process, and has the characteristics of simple structure and good self-locking stability.

The technical scheme of the invention is as follows: the utility model provides a two side clamp type motor self-locking mechanism, includes the pivot, is equipped with ball bearing in the pivot, and ball bearing's the outside is connected with the extrusion portion, and ball bearing's inner ring and outer loop exert axial packing force to the ball respectively after being extruded by the extrusion portion.

In the above double-side clamping type motor self-locking mechanism, the inner ring of the ball bearing and the outer ring of the ball bearing are arranged in opposite directions to the pressing direction of the balls.

In the double-side clamping type motor self-locking mechanism, the number of the ball bearings is two, and the two ball bearings are respectively arranged on the left side and the right side of the rotating shaft; the extrusion portion comprises a first extrusion group and a second extrusion group, and the first extrusion group and the second extrusion group correspond to the two ball bearings respectively.

In the double-side clamping type motor self-locking mechanism, the first extrusion group comprises a cover plate and a first extrusion surface positioned on the rotating shaft, the cover plate is attached to an outer ring on one side of the ball bearing, and the first extrusion surface is attached to an inner ring on the other side of the ball bearing.

In the double-side clamping type motor self-locking mechanism, the first extrusion group comprises a cover plate and a first extrusion surface positioned on the rotating shaft, the cover plate is attached to an outer ring on one side of the ball bearing, and the first extrusion surface is attached to an inner ring on the other side of the ball bearing.

In the above double-side clamping type motor self-locking mechanism, an elastic piece is arranged at a joint of the cover plate and the ball bearing.

In the double-side clamping type motor self-locking mechanism, the inner side of the cover plate is provided with a groove connected with the ball bearing in a buckling manner, the elastic sheet is arranged on the inner end surface of the groove, and one side of the elastic sheet is attached to the outer ring of the ball bearing.

In the double-side clamping type motor self-locking mechanism, the second extrusion group comprises the extrusion plate and a second extrusion surface positioned on the rotating shaft, the extrusion plate is mutually attached to the outer ring on one side of the ball bearing, and the second extrusion surface is mutually attached to the inner ring on the other side of the ball bearing.

A self-locking motor comprises the double-side clamping type motor self-locking mechanism.

Among the aforementioned self-locking motor, including electric motor rotor, electric motor rotor's inboard pivot of connecting, ball bearing sets up in electric motor rotor's both sides, and electric motor rotor's the outside is equipped with the casing, apron and stripper plate are located the both ends of casing respectively, and the outside of stripper plate is equipped with the turbine box, and pivot one end is passed the stripper plate and is extended to in the turbine box.

In the self-locking motor, the turbine box body and the cover plate are buckled with two ends of the shell respectively and are connected with the two ends of the shell through bolts.

Compared with the prior art, the invention has the following characteristics:

(1) the inner ring and the outer ring of the ball bearing can be respectively compressed through the extrusion part, so that the inner ring and the outer ring of the ball bearing can apply opposite pressing forces to the balls, the side walls of the inner ring and the outer ring can be tightly attached to the balls and form friction force to the balls, namely, the rotating shaft can drive the inner ring to rotate together by overcoming the friction force, and the self-locking effect is realized; due to the material and process requirements of the ball bearing, compared with non-standard parts which are processed by manufacturers such as claw arms, roller pins and elastic parts, the ball bearing has higher hardness and higher smoothness, so that the heat generated by the inner ring of the bearing in the relative rotation process can be reduced, the ball bearing can keep excellent working stability in a high-temperature environment, and the self-locking stability of the ball bearing can be effectively improved compared with the existing self-locking structure;

(2) the ball bearings are arranged on the two sides of the rotating shaft, so that the ball bearings on the two sides can provide friction force for the rotating shaft, namely, compared with the existing self-locking structure, the self-locking structure can be changed from one-side locking to two-side locking, the self-locking force required to be provided by the friction position on one side is reduced, and the heating temperature of the motor at the self-locking position is further reduced;

(3) compared with a shaft sleeve self-locking structure, the self-locking mechanism can also avoid the change of self-locking force caused by the change of load capacity through the friction force provided by the ball bearing after being axially pressed, thereby further improving the self-locking stability of the self-locking mechanism;

(4) on the basis, the structure of the extrusion part is further optimized, so that the axial pressing force can be applied to the ball bearing only through the matching of the extrusion surface, the elastic sheet and the extrusion plate; the rotating shaft, the cover plate, the turbine box body and the bearing on one side are all the existing motor parts, so that compared with the existing motor, the self-locking structure of the invention only adds the elastic sheet and the inner side ball bearing, namely compared with the two existing self-locking structures, the structure complexity, the number of parts and the corresponding production and assembly costs can be greatly reduced; on the other hand, the self-locking effect is realized by pressing the ball bearing, so that balls in the ball bearing can be respectively attached to the side surfaces of the inner ring and the outer ring after being pressed, namely, the bearing play of the ball bearing is eliminated; after the bearing clearance of the ball bearing is eliminated, on one hand, the positioning precision and the limiting effect of the rotating shaft can be improved, the problem of axial movement of the rotating shaft caused by the bearing clearance is avoided, and the working stability of the motor is improved; on the other hand, the requirements on the quality and the precision of the ball bearing can be correspondingly reduced, namely, a high-precision bearing with smaller bearing play is not required to be selected for positioning precision, and the raw material cost of the ball bearing is reduced;

(5) according to the invention, through further optimization of the self-locking motor, the cover plate can apply axial extrusion force to the elastic sheet in the bolt connection process, the elastic sheet can drive the rotating shaft to axially move after being pressed, and the elastic sheet is matched with the extrusion plate integrally arranged on the shell with the turbine box body to apply pressure to the outer rings of the ball bearings on two sides; compared with the existing motor structure, the motor structure does not need to add extra assembling steps during assembling, so that the assembling difficulty of the motor structure is further reduced, and the assembling efficiency of the motor structure is improved;

therefore, the invention can reduce the heating temperature of the motor in the working process and has the characteristics of simple structure and good self-locking effect.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a force pattern of the ball bearing near one side of the cover plate;

fig. 3 is an external view of the present invention.

The labels in the figures are: 1-rotating shaft, 2-ball bearing, 3-cover plate, 4-elastic sheet, 5-extrusion plate, 6-motor rotor, 7-shell, 8-turbine box, 101-first extrusion surface, 102-second extrusion surface, 201-inner ring, 202-outer ring, 203-ball and 301-groove.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example 1. A double-side clamping type motor self-locking mechanism is shown in figures 1-2 and comprises a rotating shaft 1, wherein a ball bearing 2 is arranged on the rotating shaft 1, the ball bearing 2 is a conventional bearing with an inner ring 201, an outer ring 202 and balls 203, an extrusion part is connected to the outer side of the ball bearing 2, and the inner ring 201 and the outer ring 202 of the ball bearing 2 are respectively pressed by the extrusion part to apply axial pressing force to the balls 203.

The inner ring 201 of the ball bearing 2 and the outer ring 202 of the ball bearing 2 are disposed so as to face each other in the direction of pressing the balls 203.

The number of the ball bearings 2 is two, and the two ball bearings 2 are respectively arranged on the left side and the right side of the rotating shaft 1; the extrusion portion includes first extrusion group and second extrusion group, and first extrusion group and second extrusion group correspond two ball bearing 2 respectively.

The first extrusion group comprises a cover plate 3 and a first extrusion surface 101 positioned on the rotating shaft 1, the cover plate 3 is attached to an outer ring 202 on one side of the ball bearing 2, and the first extrusion surface 101 is attached to an inner ring 201 on the other side of the ball bearing 2.

The joint of the cover plate 3 and the ball bearing 2 is provided with an elastic sheet 4, and the elastic sheet 4 can be selected from a wave washer.

The inner side of the cover plate 3 is provided with a groove 301 which is connected with the ball bearing 2 in a buckling mode, the elastic sheet 4 is arranged on the inner end face of the groove 301, and one side of the elastic sheet 4 is attached to the outer ring 202 of the ball bearing 2.

The second extrusion group comprises an extrusion plate 5 and a second extrusion surface 102 positioned on the rotating shaft 1, the extrusion plate 5 is attached to an outer ring 202 on one side of the ball bearing 2, and the second extrusion surface 102 is attached to an inner ring 201 on the other side of the ball bearing 2; the two ball bearings 2 are axially fixed by the first pressing surface 101, the second pressing surface 102 and the snap spring.

A self-locking motor is formed as shown in figure 3, and comprises the double-side clamping type motor self-locking mechanism.

Self-locking motor includes electric motor rotor 6, and pivot 1 is connected to electric motor rotor 6's inboard, ball bearing 2 sets up in electric motor rotor 6's both sides, and electric motor rotor 6's the outside is equipped with casing 7, apron 3 and stripper plate 5 are located the both ends of casing 7 respectively, and stripper plate 5's outside is equipped with turbine box 8, and turbine box 8 and stripper plate 5 integrated into one piece, and 1 one end of pivot is passed stripper plate 5 and is extended to 8 in-connection turbines of turbine box.

The turbine box body 8 and the cover plate 3 are buckled with two ends of the shell 7 and are connected with the two ends of the shell through bolts.

The working principle of the invention is as follows: when the invention is installed, the turbine box body 8 with the extrusion plate 5 is fixed at one end of the shell 7, then the motor rotor 6 and the two ball bearings 2 are sequentially installed on the rotating shaft 1, and then the rotating shaft 1 extends into the shell 7 and one end of the rotating shaft penetrates through the extrusion plate 5 and extends into the turbine box body 8. After the rotating shaft 1 is fixed, the elastic piece 4 is placed in the groove 301 of the cover plate 3, the cover plate 3 is buckled at the other end of the shell 7, and the shell 7 is locked through a bolt.

In the locking process of the shell 7, the elastic piece 4 is pressed and then attached to the side wall of the outer ring 202 of the outer ball bearing 2 (the outer side is close to the cover plate 3), and the rotating shaft 1 is driven to move towards the direction of the turbine box body 8 along the axial direction. When the rotating shaft 1 moves to the side wall of the outer ring 202 of the inner side ball bearing 2 and is mutually attached to the extrusion plate 5, the rotating shaft 1 continues to move towards the direction of the turbine box body 8 under the extrusion action, and the outer ring 202 keeps the transverse position unchanged under the limiting action of the extrusion plate 5, so that the inner ring 201 and the outer ring 202 of the inner side ball bearing 2 form relative displacement along the axial direction, further the axial play of the connecting positions of the balls 203, the inner ring 201 and the outer ring 202 is completely eliminated, and opposite extrusion forces are respectively formed on the balls 203. When the ball bearing 2 on the inner side is pressed and completely deformed, the ball bearing can be matched with the second extrusion surface 102 to limit the rotating shaft 1, so that the subsequent movement of the rotating shaft 1 is avoided. After the rotating shaft 1 is fixed, the outer ball bearing 2 is continuously pressed by the elastic sheet 4 at the outer ring 202, so that the outer ball bearing 2 is deformed in the same manner, that is, the inner ring 201 and the outer ring 202 respectively press the balls 203 from both sides. Under the cooperation, the pretightening force of the elastic sheet 4 after being pressed and deformed can be simultaneously applied to the ball bearings 2 on the two sides, so that the balls 203 of the ball bearings 2 on the two sides are axially compressed with the inner ring 201 and the outer ring 202 after being subjected to opposite extrusion forces, that is, the friction resistance of the balls 203 and the inner ring 201 and the outer ring 202 during relative rotation is increased, and the self-locking effect of the self-locking device is achieved.

Through the mode of realizing the auto-lock to both sides ball bearing 2's extrusion, compare the current motor that does not contain auto-lock structure, only increased two parts of flexure strip 4 and inboard ball bearing 2, reduced the required spare part quantity and the occupation space of auto-lock structure by a wide margin to make things convenient for producer's production and equipment. Simultaneously, the structure of both sides friction locking compares the unilateral locking structure of current self-locking motor, can with the point of generating heat just one side dispersion to both sides to reduce the temperature that generates heat of unilateral structure, improved the job stabilization nature and the life of motor.

Example 2. A one-side clamping type motor self-locking mechanism is shown in figure 2 and comprises a rotating shaft 1, wherein a ball bearing 2 is arranged on the rotating shaft 1, the ball bearing 2 is a bearing with a conventional structure comprising an inner ring 201, an outer ring 202 and balls 203, an extrusion part is connected to the outer side of the ball bearing 2, and the inner ring 201 and the outer ring 202 of the ball bearing 2 are respectively pressed by the extrusion part to apply axial pressing force to the balls 203.

The inner ring 201 of the ball bearing 2 and the outer ring 202 of the ball bearing 2 are disposed so as to face each other in the direction of pressing the balls 203.

The ball bearing 2 is disposed at one side of the rotation shaft 1.

The extrusion part comprises a cover plate 3 and a first extrusion surface 101 positioned on the rotating shaft 1, the cover plate 3 is attached to an outer ring 202 on one side of the ball bearing 2, and the first extrusion surface 101 is attached to an inner ring 201 on the other side of the ball bearing 2.

The joint of the cover plate 3 and the ball bearing 2 is provided with an elastic sheet 4, and the elastic sheet 4 can be selected from a wave washer.

The inner side of the cover plate 3 is provided with a groove 301 which is connected with the ball bearing 2 in a buckling mode, the elastic sheet 4 is arranged on the inner end face of the groove 301, and one side of the elastic sheet 4 is attached to the outer ring 202 of the ball bearing 2.

A self-locking motor is formed as shown in figure 3, and comprises the single-side clamping type motor self-locking mechanism.

Self-locking motor includes electric motor rotor 6, and electric motor rotor 6's inboard pivot 1 of connecting, electric motor rotor 6's the outside is equipped with casing 7, and casing 7's both ends are connected with apron 3 and turbine box 8, ball bearing 2 sets up in the pivot 1 that is close to 3 one side of apron, and pivot 1 is keeping away from 3 one end of apron and is spacing with the mutual lock of turbine box 8, and 1 one end of pivot extends to the 8 in-connection turbines of turbine box.

The turbine box body 8 and the cover plate 3 are buckled with two ends of the shell 7 and are connected with the two ends of the shell through bolts.

Compared with the embodiment 1, the self-locking structure of the motor has the advantages that the ball bearings 2 on the inner side are reduced, so that the self-locking structure of the motor is simpler, the structural complexity of the embodiment is further reduced, and the external dimension of the motor is reduced.