A self-locking motor

Abstract

The present invention provides a self-locking motor, which includes a motor housing and a motor shaft. The motor shaft is installed inside the motor housing, and the following components are installed inside the motor housing: a bearing sleeved outside the motor shaft; a bearing cover covering the end of the bearing; a first friction member fixedly connected to the bearing cover, and one end of the first friction member close to the motor shaft abuts against the bearing. By adopting the installation method of fixedly connecting the first friction member with the bearing cover, and one end of the first friction member close to the motor shaft abuts against the bearing, when the motor shaft needs to generate self-locking, under the condition that the first friction member and the bearing are closely fitted to generate friction, the self-locking force of the motor is increased, and the self-locking strength is improved. That is, when the motor shaft stops after outputting for a period of time and the driving member needs to be locked at a high position, the self-locking force can be increased through the structure of the above-mentioned motor, so that the driving member can be locked at a high position and will not fall under the action of its own weight.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly, to a self-locking motor. Background Art

[0002] With the increasing requirements for the driving precision of motors, the functional requirements for motors have become more prominent. In the prior art, when a motor needs to be self-locked due to excessive output, a large self-locking force is required to achieve the self-locking of the motor. Most motors do not have an additional self-locking force, and only a small number of motors have an additional self-locking force. However, the self-locking structures in these small number of motors still have the following problems: 1. The self-locking structure is installed in the gearbox, which will affect the rotation speed of the motor and seriously reduce the performance of the motor during the normal operation of the motor. 2. The self-locking structure is arranged on the motor shaft, but the structure is relatively complex, the corresponding production process is cumbersome, and the cost is high.

[0003] Based on this, the inventor proposes a self-locking motor to solve the above technical problems. Summary of the Invention

[0004] The problem solved by the present invention is the technical problem that the existing self-locking structure is arranged on the motor shaft, the self-locking structure is relatively complex, the corresponding production process is cumbersome, and the cost is high.

[0005] To solve the above problems, the present invention provides a self-locking motor, including a motor housing and a motor shaft. The motor shaft is installed in the motor housing, and the following are also installed in the motor housing: a bearing sleeved outside the motor shaft; a bearing cover covering the end of the bearing; a first friction member fixedly connected to the bearing cover, and one end of the first friction member close to the motor shaft abuts against the bearing. Wherein, when the motor shaft drives the bearing to rotate, the first friction member and the bearing generate friction to increase the self-locking force of the motor.

[0006] Compared with the prior art, the technical effects that can be achieved by adopting this solution are as follows: By adopting the installation method of fixedly connecting the first friction member to the bearing cover, and one end of the first friction member close to the motor shaft abuts against the bearing, when the motor shaft needs to generate self-locking, under the condition that the first friction member and the bearing are closely matched to generate friction, the self-locking force of the motor is increased, and the self-locking strength is improved. That is, when the motor shaft stops after outputting for a period of time and needs to lock the driving member at a high position, the self-locking force can be increased through the structure of the above motor, so that the driving member can be locked at a high position and will not fall under its own weight.

[0007] In this embodiment, the bearing includes: an outer bearing ring; an inner bearing ring, the inner surface of the inner bearing ring fits with the outer side wall of the motor shaft; and balls disposed between the outer bearing ring and the inner bearing ring.

[0008] The technical effect after adopting this technical solution is that the bearing includes an inner bearing ring and an outer bearing ring, and balls are installed between the inner bearing ring and the outer bearing ring to reduce the friction during power transmission and improve the transmission efficiency of mechanical power in a rolling manner. When the motor shaft rotates, it drives the bearing to rotate, thereby improving the transmission efficiency of mechanical power.

[0009] In this embodiment, the number of the balls is multiple, and the multiple balls are radially and uniformly arranged along the inner wall of the outer bearing ring.

[0010] The technical effect after adopting this technical solution is that the setting of multiple balls is usually made of high chromium steel with high strength, small rotational friction resistance, relatively low temperature generated by friction, and being radially and uniformly arranged along the inner wall of the outer bearing ring, which can evenly share the friction during power transmission and improve the transmission efficiency of mechanical power.

[0011] In this embodiment, a first annular wall is provided on the outer side wall of the inner bearing ring. One end of the first friction member close to the motor shaft extends into the first annular wall, and the end of the first friction member away from the motor shaft is fixedly connected to the bearing cover.

[0012] The technical effect after adopting this technical solution is that the inner bearing ring is firmly connected to the motor shaft, and one end of the first friction member close to the motor shaft extends into the first annular wall so that the first friction member is in contact with the first annular wall. After the first friction member is in contact with the first annular wall, the self-locking force of the motor is increased, and the other end of the first friction member is fixedly connected to the bearing cover, which can reduce the production process and has a simple structure.

[0013] In this embodiment, a first abutting portion is provided at one end of the bearing cover close to the outer bearing ring, and a second annular wall is provided on the inner side wall of the outer bearing ring that cooperates with the first abutting portion. The first abutting portion extends into the second annular wall so that the bearing cover is installed at the end of the bearing.

[0014] The technical effect after adopting this technical solution is that in order to ensure that the bearing cover can be stably covered on the bearing, one end of the bearing cover is matched with the second annular wall through the first abutting portion so that the first abutting portion extends into the first annular wall, which can make the bearing cover stably cover and be installed at the end of the bearing to prevent the phenomenon that the bearing cover detaches from the bearing during the rotation of the bearing.

[0015] In this embodiment, a flanging is provided at the end of the first abutting portion, and the flanging is bent towards the inner bearing ring.

[0016] The technical effect after adopting this technical solution is that the setting of the flanging is for aesthetic needs on the one hand, and on the other hand, it is used to make a rotational connection with the housing outside the bearing through the setting of the flanging, so that the bearing can rotate relative to the housing.

[0017] In this embodiment, the bearing cover includes: a horizontal portion, one end of the horizontal portion close to the inner ring of the bearing is fixedly connected to the first friction member; an inclined portion, the inclined portion is fixedly connected to one end of the horizontal portion close to the inner ring of the bearing; a flanging is fixedly connected to the end of the inclined portion away from the inner ring of the bearing.

[0018] The technical effect after adopting this technical solution is that the bearing cover can be specifically divided into a horizontal portion and an inclined portion, wherein one end of the horizontal portion is fixedly connected to the first friction member, and the other end of the horizontal portion is fixedly connected to the inclined portion, so that the bearing cover is first horizontal and then inclined from the inner ring to the outer ring of the bearing to improve the strength of the bearing cover.

[0019] In this embodiment, the number of both the first annular wall and the second annular wall is two. The first annular wall is located on the upper side and the lower side of the inner ring of the bearing, and the second annular wall is located on the upper side and the lower side of the inner ring of the bearing. The horizontal heights of the first annular wall and the second annular wall are the same.

[0020] The technical effect after adopting this technical solution is that in order to improve the friction fit degree between the first friction member and the inner ring of the bearing, the number of both the first annular wall and the second annular wall is set to two, and they are symmetrically arranged to ensure the stable fit between the first annular wall and the second annular wall and the first friction member.

[0021] In this embodiment, the first friction member is detachably connected to the bearing cover, and both the first friction member and the bearing cover are formed by injection molding.

[0022] The technical effect after adopting this technical solution is that the first friction member and the bearing cover can be integrally manufactured by injection molding respectively, and then the first friction member and the bearing cover are fixedly connected by bonding means such as glue, so as to achieve the purpose of forming a whole for the first friction member and the bearing cover.

[0023] In this embodiment, the first friction member is a rubber member.

[0024] The technical effect after adopting this technical solution is that using a rubber member can increase the contact friction force with the inner ring of the bearing, so as to achieve the purpose of increasing the self-locking force of the motor. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a self-locking motor of the present invention;

[0026] Figure 2Schematic structural diagram of the bearing in the present invention;

[0027] Figure 3 Top view of the bearing in the present invention;

[0028] Figure 4 is Figure 3 Cross-sectional view taken along line A-A in

[0029] Figure 5 is Figure 4 Enlarged view of part B in

[0030] Figure 6 Schematic structural diagram of a self-locking motor in the present invention with part of the motor housing omitted;

[0031] Figure 7 is Figure 6 Schematic structural diagram of the front view in

[0032] Explanation of reference numerals: 1, motor housing; 2, motor shaft; 3, bearing; 301, bearing outer ring; 302, bearing inner ring; 303, ball; 304, first annular wall; 4, bearing cover; 401, horizontal part; 402, inclined part; 5, first friction member; 6, bearing cage; 7, first abutting part; 8, second annular wall; 9, flange. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0034]

First Embodiment

[0035] In this embodiment, the motor housing 1 is preferably a cuboid that can accommodate the motor shaft 2. The motor shaft 2 is the output shaft of the motor. By installing a transmission member, such as a rotating block, on the motor shaft 2, the rotating block can be driven to rotate, or a lead screw is installed on the output shaft of the motor, and a slider is relatively slidably connected to the lead screw to make the slider perform a lifting movement. Of course, a gearbox is also installed inside the motor housing 1. Through the function of the gearbox, the speed ratio can be increased or decreased according to the actual situation to achieve the purpose of transmission.

[0036] This application also installs a bearing 3 inside the motor housing 1. The bearing 3 is sleeved on the outer sidewall of the motor shaft 2, and the connection relationship between the bearing 3 and the outer sidewall of the motor shaft 2 is a tight connection. The bearing 3 can be sleeved on the outer sidewall of the motor shaft 2 by means of key connection. That is, spline grooves are provided on the sidewall of the motor shaft 2, and splines matching the key grooves are provided on the inner sidewall of the bearing 3. Through the cooperation of the splines and the spline grooves, the bearing 3 can be more firmly sleeved on the outer sidewall of the motor shaft 2 to ensure that when the motor shaft 2 rotates, the bearing 3 also rotates along with the motor shaft 2.

[0037] A bearing cover 4 is used to cover the upper and lower ends of the bearing 3. Its function is to prevent dust from entering the bearing 3, and it can also ensure that the lubricant only acts on the balls 303 inside the bearing 3 and does not overflow to the outside of the bearing 3. In addition, it can also prevent the balls 303 and other vulnerable parts inside the bearing 3 from being damaged by external forces to a certain extent.

[0038] The first friction member 5 is of an annular structure and is fixedly connected to the bearing cover 4. As shown in Figure 4 , 5 When the first friction member 5 and the bearing cover 4 are separately connected, the end of the first friction member 5 close to the bearing cover 4 has a groove for installing the bearing cover 4. One end of the bearing cover 4 is installed in the above groove, and the first friction member 5 and the bearing cover 4 are fixedly connected by means of glue or the like to ensure that the first friction member 5 and the bearing cover 4 form an integral body. The above first friction member 5 and bearing cover 4 can be integrally injection-molded respectively. The injection process is relatively simple, the production process is not complicated, and it is easy to process and produce.

[0039] When the motor shaft 2 drives the bearing 3 to rotate, the first friction member 5 generates friction with the bearing 3 to increase the self-locking force of the motor. That is, when the motor shaft 2 stops after outputting for a period of time and the driving member needs to be locked at a high position, the self-locking force can be increased through the structure of the above motor, so that the driving member can be locked at a high position and the driving member will not fall under its own weight.

[0040]

Second Embodiment

[0041] The bearing 3 includes an outer bearing ring 301 and an inner bearing ring 302. A plurality of balls 303 are installed between the inner bearing ring 302 and the outer bearing ring 301, and a bearing cage is installed between the inner bearing ring 302 and the outer bearing ring 301. The bearing cage is provided with a plurality of accommodation spaces for the balls 303 to be accommodated, and they are evenly distributed along the radial direction of the bearing 3. It reduces the friction during power transmission and improves the transmission efficiency of mechanical power in a rolling manner. When the motor shaft 2 rotates, it drives the bearing 3 to rotate simultaneously to improve the transmission efficiency of mechanical power.

[0042]

Third Embodiment

[0043] The balls 303 are usually made of high chromium steel and have high strength, small rotational friction resistance, and relatively low temperature generated by friction. They can evenly distribute the friction during power transmission and improve the transmission efficiency of mechanical power.

[0044]

Fourth Embodiment

[0045] As Figure 4 shown, the first annular wall 304 is a stepped annular wall, and one end of the first friction member 5 close to the motor shaft 2 can extend into this stepped annular wall, so that the first friction member 5 and the first annular wall 304 are in contact with each other during the rotation of the motor shaft 2 to increase the self-locking force of the motor. The end of the first friction member 5 far from the motor shaft 2 is fixedly connected to the bearing cover 4 by strong glue bonding, which can reduce the production process and has a simple structure.

[0046]

Fifth Embodiment

[0047] The first abutting portion 7 is also a continuously arranged annular ring. A second annular wall 8 is provided on the inner side wall of the outer bearing ring 301. Through the cooperation between the annular ring and the second annular wall 8, the first abutting portion 7 extends into the second annular wall 8, enabling the bearing cover 4 to be installed to the end of the bearing 3.

[0048]

Sixth Embodiment

[0049] The provision of the flanging 9 is for aesthetic requirements on the one hand, and on the other hand, by providing the flanging 9, the bearing 3 is rotatably connected to the housing outside the bearing 3, ensuring the stable reliability when the bearing 3 rotates.

[0050] As Figure 4 shown, the flanging 9 is a structure bent towards the inner ring of the bearing 3. Through the acting force of the flanging 9, the flanging 9 is stuck in the housing outside the bearing 3. Correspondingly, the housing outside the bearing 3 is provided with an annular groove for accommodating the flanging 9, so that the whole bearing 3 rotates relative to the housing.

[0051]

Seventh Embodiment

[0052] As Figure 4 described, the horizontal portion 401 is horizontally arranged in the illustrated direction, and one end of the horizontal portion 401 close to the inner ring 302 of the bearing is fixedly connected to the first friction member 5. The first friction member 5 is an annular ring, and a groove is provided at one end of the first friction member 5 close to the bearing cover 4 to facilitate the installation of the bearing cover 4 on the first friction member 5; and a stepped groove is also installed at one end of the first friction member 5 close to the inner ring 302 of the bearing to facilitate the first friction member 5 to fit with the inner surface of the inner ring 302 of the bearing. Thus, when the motor shaft 2 rotates, the first friction member 5 and the inner ring 302 of the bearing friction to increase the self-locking force of the motor.

[0053] The provision of the inclined portion 402 can improve the overall strength of the bearing cover 4, so that the bearing cover 4 is more stably installed at the end of the bearing 3.

[0054]

Eighth Embodiment

[0055] In order to improve the frictional fit between the first friction member 5 and the inner ring 302 of the bearing, the number of the first annular wall 304 and the second annular wall 8 is set to two, both upper and lower, and symmetrically arranged to ensure the stable fit between the first annular wall 304 and the second annular wall 8 and the first friction member 5.

[0056]

Ninth Embodiment

[0057] The first friction member 5 and the bearing cover 4 can be integrally manufactured by injection molding respectively, and then the first friction member 5 and the bearing cover 4 are fixedly connected by bonding means such as glue, so as to achieve the purpose that the first friction member 5 and the bearing cover 4 form a whole.

[0058]

Tenth Embodiment

[0059] Using a rubber member can increase the contact friction force with the inner ring 303 of the bearing, so as to achieve the purpose of increasing the self-locking force of the motor.

[0060] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A self-locking motor, comprising a motor housing (1) and a motor shaft (2), the motor shaft (2) being installed in the motor housing (1), characterized in that, Inside the motor housing (1), there is also installed: A bearing (3) sleeved outside the motor shaft (2); the bearing (3) includes: an outer bearing ring (301); an inner bearing ring (302), the inner surface of the inner bearing ring (302) being in contact with the outer side wall of the motor shaft (2); balls (303) disposed between the outer bearing ring (301) and the inner bearing ring (302). A bearing cover (4) covering the end of the bearing (3). A first friction member (5), one end of the first friction member (5) away from the motor shaft (2) being fixedly connected to the bearing cover (4), and one end of the first friction member (5) close to the motor shaft (2) being in contact with the bearing (3). Wherein, when the motor shaft (2) drives the bearing (3) to rotate, the first friction member (5) generates friction with the bearing (3) to increase the motor self-locking force. A first annular wall (304) is provided on the outer wall of the inner bearing ring (302), and one end of the first friction member (5) close to the motor shaft (2) extends into the first annular wall (304).

2. The self-locking motor according to claim 1, wherein, The number of the balls (303) is multiple, and the multiple balls (303) are radially and uniformly arranged along the inner wall of the outer bearing ring (301).

3. The self-locking motor according to claim 1, wherein One end of the bearing cover (4) close to the outer bearing ring (301) is provided with a first contact portion (7), and a second annular wall (8) matching the first contact portion (7) is provided on the inner side wall of the outer bearing ring (301). The first contact portion (7) extends into the second annular wall (8) so that the bearing cover (4) is installed at the end of the bearing (3).

4. The self-locking motor according to claim 3, wherein A flanging (9) is provided at the end of the first contact portion (7), and the flanging (9) is bent towards the inner bearing ring (302).

5. The self-locking motor according to claim 4, wherein The bearing cover (4) includes: A horizontal portion (401), one end of the horizontal portion (401) close to the inner bearing ring (302) being fixedly connected to the first friction member (5). An inclined portion (402) fixedly connected to one end of the horizontal portion (401) close to the inner bearing ring (302). The flanging (9) is fixedly connected to the end of the inclined portion (402) away from the inner bearing ring (302).

6. The self-locking motor according to claim 3, wherein The number of both the first annular wall (304) and the second annular wall (8) is two. The first annular wall (304) is located on the upper side and the lower side of the inner bearing ring (302), and the second annular wall (8) is located on the upper side and the lower side of the inner bearing ring (302). The horizontal heights of the first annular wall (304) and the second annular wall (8) are the same.

7. The self-locking motor according to claim 1, wherein The first friction member (5) is separately connected to the bearing cover (4), and both the first friction member (5) and the bearing cover (4) are formed by injection molding.

8. The self-locking motor according to claim 1, characterized in that, The first friction member (5) is a rubber part.

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