CN213461408U

CN213461408U - Motor capable of being stopped quickly

Info

Publication number: CN213461408U
Application number: CN202022706209.3U
Authority: CN
Inventors: 梅锐; 朱智平; 张磊; 任凯乐; 朱雨剑
Original assignee: Hengdian Group Innuovo Electric Co Ltd
Current assignee: Hengdian Group Innuovo Electric Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-06-15
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a motor, concretely relates to motor that can shut down fast. A motor capable of being stopped quickly comprises a shell, an end cover, a rotor, a magnetic ring and a metal ring, wherein the metal ring is made of a permanent magnet material, the magnetic ring and the metal ring are close to each other and can mutually generate a magnetic force action, a plurality of magnetic poles are formed on the end faces or the circumferential faces of the magnetic ring and the metal ring, which are adjacent to each other, the magnetic poles are arranged in a staggered mode in the N pole and the S pole in the circumferential direction of the magnetic ring, one ring piece of two ring pieces of the magnetic ring and the metal ring is coaxially fixed on the rotor, and the other ring piece of the two ring pieces is fixed with the shell or the. The utility model has the advantages that no dust generated by friction exists, and the situation that the motor is blocked or the service life is shortened can be effectively avoided; the utility model has the advantages of can realize stopping fast, there is invariable magnetic damping moment of torsion during just using.

Description

Motor capable of being stopped quickly

Technical Field

The utility model relates to a motor, concretely relates to motor that can shut down fast.

Background

Chinese patent application No. 201910494172.1 discloses a motor capable of being stopped quickly, which provides damping to a rotor shaft through mechanical structures such as a compression spring, so as to reduce the rotating speed of a rotor after the motor is powered off, so as to realize quick stop rotation of the rotor, and realize quick stop of the motor. The above scheme has the following defects: mechanical parts such as a compression spring and the like generate noise when rotating, and the parts such as the compression spring and the like are abraded to generate scrap dust, so that the risk of clamping the motor parts and shortening the service life is caused; meanwhile, along with the abrasion of parts such as a compression spring and the like, the damping torque can gradually decrease along with the increase of the service time, and the motor is difficult to realize quick stop after power failure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can avoid in the motor spare part to block, and the motor of low noise can shut down fast.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a motor capable of being stopped quickly comprises a shell, an end cover, a rotor, a magnetic ring and a metal ring, wherein the metal ring is made of a permanent magnet material, the magnetic ring and the metal ring are close to each other and can mutually generate a magnetic force action, a plurality of magnetic poles are formed on the end faces or the circumferential faces of the magnetic ring and the metal ring, which are adjacent to each other, the magnetic poles are arranged in a staggered mode in the N pole and the S pole in the circumferential direction of the magnetic ring, one ring piece of two ring pieces of the magnetic ring and the metal ring is coaxially fixed on the rotor, and the other ring piece of the two ring pieces is fixed with the shell or the.

When the motor is used, the magnetic ring magnetizes the metal ring made of the permanent magnet material, so that magnetic poles attracted with the magnetic ring are formed on the end face or the circumferential face of the metal ring close to the magnetic ring, and with the rotation of the magnetic ring, the metal ring and the magnetic ring can continuously have a magnetic damping torque with constant torque in the process, so that the required force for the rotation of the rotor is increased, the rotating speed of the rotor is reduced, and the motor can be quickly stopped after being powered off.

The motor of the utility model adopts a magnetic damping structure, and no mechanical friction exists in the motor operation process, so that no noise is generated, and the effect of low noise and even silence can be realized; because there is not mechanical friction, do not have the produced dust of friction, can effectively avoid the risk that the motor card dies or life shortens. Meanwhile, the magnetic ring continuously magnetizes the metal ring in the rotating process, the metal ring made of the permanent magnet material is magnetized to have the same pole pair number as the magnetic ring, but the magnetic poles on the metal ring are not fixed and change along with the rotation of the magnetic ring, so that the magnetic damping torque with constant torque can ensure that the motor still keeps still under the action of external force (such as gravity, mechanism spring force and the like) after the power failure, and the phenomenon that the rotor of the motor slides down or slides back is avoided.

Preferably, the magnetic ring and the metal ring are sleeved with each other, and the magnetic pole is formed on the circumferential surface of the magnetic ring. The magnetic ring is positioned at the circumferential outer side or the circumferential inner side of the metal ring, so that the axial size of the motor can be smaller, and the motor can be smaller.

Preferably, the magnetic ring and the metal ring are arranged at intervals along the axial direction of the rotor, and the magnetic poles are formed on the end face of the magnetic ring. The magnetic ring is positioned on one axial side of the metal ring, so that the size of the motor can be smaller.

Preferably, the axis of the magnetic ring is substantially coincident with the axis of the metal ring. The above-mentioned setting so that the utility model discloses the structure is more stable, and is more stable during the use, can not take place vibrations and noise, and life is longer.

Preferably, the metal ring axis is offset from the magnetic ring axis. The magnetic resistance is improved by the arrangement, so that the effect of rapid shutdown is more obvious.

Preferably, a fixing groove is formed inside the end cover, and one of the two ring pieces of the magnetic ring and the metal ring is fixed in the fixing groove. The annular piece fixed in the end cover fixing groove is smaller in size, and the annular piece is more convenient to position and fix. In the fixed slot on the ring-shaped member is fixed in the end cover, can avoid occupying too much motor inner space, do not influence the setting of other motor parts.

Preferably, a bearing chamber for fixing a bearing is formed inside the end cover, the step-shaped fixing groove is formed at an opening of the bearing chamber, and the rotor shaft of the rotor is rotatably fixed to the end cover through the bearing. The bearing chamber opening part is provided with a fixing groove, so that the ring-shaped part can be fixedly positioned in the fixing groove in a tight fit mode and can also be fixed in the fixing groove through glue. The inner diameter of the ring-shaped member fixed in the fixing groove should be larger than the outer diameter of the bearing, and interference with the components on the iron core of the rotor is avoided.

Preferably, one of the two ring members of the magnetic ring and the metal ring is fixed to a rotor shaft of the rotor. The inner diameter of the ring-shaped member fixed to the rotor shaft can be made smaller and the stability in rotation is higher.

Preferably, the rotor shaft is externally fixed with a connecting ring, and the annular part is fixed on the end face or the circumferential surface of the connecting ring. The annular piece is fixed with the rotor shaft through the connecting ring, so that less material consumption and lower cost of the annular piece can be realized, and the annular piece can be more stably fixed. The connecting ring can be made of aluminum, copper or iron and can be made into various shapes, and the annular piece can be fixed on the circumferential surface of the connecting ring in the circumferential direction and also can be fixed on the axial end surface of the connecting ring.

Preferably, the connection ring is made of a magnetically permeable material. The connecting ring is made of magnetic conductive materials so as to strengthen the magnetic torque between the magnetic ring and the metal ring and improve the effect of rapid shutdown.

The utility model has the advantages that no dust generated by friction exists, and the situation that the motor is blocked or the service life is shortened can be effectively avoided; the utility model has the advantages of can realize shutting down fast, and have invariable magnetic damping moment of torsion when using, can make the motor still keep static under the effect of external force (like gravity, mechanism spring force etc.) after the outage, have the advantage that can avoid electric motor rotor to appear load gliding or the phenomenon of falling the swift current.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 3 of the present invention;

fig. 4 is a damping characteristic diagram of the present invention in use.

Detailed Description

The invention will be further described with reference to the drawings and the specific embodiments.

Example 1

Shown by figure 1, the utility model discloses a motor that can shut down fast, including casing 1, end cover 2, magnetic ring 4 and becket 5, rotatable being fixed with the rotor in the casing 1, the rotor includes rotor shaft 3, becket 5 is made by permanent magnetic material, and magnetic ring 4 closes on each other and can take place magnetic action each other with becket 5, is formed with a plurality of magnetic poles on magnetic ring 4 and the adjacent periphery of becket 5, and a plurality of magnetic poles are N utmost point and S utmost point staggered arrangement on the 4 circumferencial directions of magnetic ring. One of the two annular pieces of the magnetic ring 4 and the metal ring 5 is coaxially fixed on the rotor 3, and the other annular piece of the two annular pieces is fixed with the end cover 2.

Wherein, a magnetic ring 4 is coaxially fixed on a rotor shaft 3 of the rotor, and a metal ring 5 fixed with the end cover 2 is fixed in the casing 1. The magnetic ring 4 and the metal ring 5 are sleeved with each other, wherein the axis of the metal ring 5 is basically superposed with the axis of the magnetic ring 4, and the metal ring 5 is sleeved on the circumferential outer side of the magnetic ring 4. Wherein, the metal ring 5 is made of permanent magnet alloy, and the magnetic ring 4 is made of neodymium iron boron material.

A bearing chamber 22 for fixing the bearing 21 is formed on the inner side of the end cover 2, a step-shaped fixing groove is formed at the opening of the bearing chamber 22, the rotor shaft 3 of the rotor is rotatably fixed with the end cover 2 through the bearing 21, and the metal ring 5 is fixed in the fixing groove.

The rotor shaft 3 of the rotor is fixed with the magnetic ring 4 through a connecting ring 31, the connecting ring 31 made of magnetic conductive material is fixed outside the rotor shaft 3, and the magnetic ring 4 is fixed on the circumferential surface of the connecting ring 31.

As shown in fig. 4, the magnetic ring 4 continuously magnetizes the metal ring 5 in the rotating process, the metal ring 5 made of permanent magnet alloy is magnetized to have the same pole pair number as the permanent magnet magnetic ring 4, the damping torque keeps stable along with the rotation of the magnetic ring 4 and along with the increase of the service time, and the metal ring 5 can continuously have a magnetic damping torque with constant torque in the process.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the magnetic ring 4 and the metal ring 5 are arranged at intervals along the axial direction of the rotor, the magnetic poles are formed on the end surface of the magnetic ring 4, and the end surface of the magnetic ring 4 and the end surface of the metal ring 5 have annular coincident surfaces along the axial projection of the rotor shaft.

Example 3

As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the widths of the metal ring 5 at all circumferential positions are the same, and the axis of the metal ring 5 deviates from the axis of the magnetic ring 4. The connecting ring 31 is of a step-shaped structure, the rotor shaft 3 is provided with a step bulge 30 used for limiting the connecting ring 31, the connecting ring 31 is tightly matched on the rotor shaft, and the magnetic ring 4 is tightly matched on the connecting ring 31. Wherein, the connecting ring 31 is made of magnetic conductive material (iron is selected).

The utility model has the advantages of it is following: firstly, the structure of the utility model is a magnetic damping structure, and there is no mechanical friction in the running process of the motor, so that no mechanical noise is generated, the effect of completely low noise or even completely silence can be realized, and the use experience of the motor is improved; dust generated by friction does not exist, and the risk of motor jamming or service life shortening can be effectively avoided; and the output damping moment is stable, the long-time stable work can be met, and the motor is suitable for occasions requiring that the motor still keeps static under the action of external force (such as gravity, mechanism spring force and the like) after power failure and requiring that the rotor of the motor does not slide down or slide back.

Claims

1. A motor capable of being stopped quickly is characterized by comprising a casing, an end cover, a rotor, a magnetic ring and a metal ring, wherein the metal ring is made of a permanent magnet material, the magnetic ring and the metal ring are close to each other and can mutually generate a magnetic force action, a plurality of magnetic poles are formed on the end face or the circumferential face of the magnetic ring adjacent to the metal ring, the magnetic poles are arranged in a staggered mode in an N pole and an S pole mode in the circumferential direction of the magnetic ring, one ring piece of two ring pieces of the magnetic ring and the metal ring is coaxially fixed on the rotor, and the other ring piece of the two ring pieces is fixed with the casing or the end cover.

2. The motor of claim 1, wherein the magnetic ring and the metal ring are sleeved with each other, and the magnetic poles are formed on the circumferential surface of the magnetic ring.

3. The motor as claimed in claim 1, wherein the magnetic ring and the metal ring are spaced apart from each other in the axial direction of the rotor, and the magnetic poles are formed on the end surfaces of the magnetic ring.

4. The rapidly shuttling electric machine of claim 1, wherein the axis of the magnetic ring is substantially coincident with the axis of the metal ring.

5. The rapidly shuttling electric machine of claim 1, wherein the axis of the magnetic ring is offset from the axis of the metal ring.

6. The rapidly stoppable motor according to claim 1 wherein a retaining groove is formed in an inner side of said end cap, and one of said two ring members of said magnet ring and said metal ring is retained in said retaining groove.

7. The motor capable of being rapidly stopped according to claim 6, wherein a bearing chamber for fixing a bearing is formed inside the end cover, the opening of the bearing chamber is provided with the fixing groove in a step shape, and a rotor shaft of the rotor is rotatably fixed with the end cover through the bearing.

8. The rapidly stoppable motor of claim 1 wherein one of said two ring members of said magnet ring and said metal ring is fixed to a rotor shaft of the rotor.

9. The rapidly stoppable motor according to claim 8 wherein the rotor shaft has a connecting ring secured thereto and the annular member is secured to an end surface or circumferential surface of the connecting ring.

10. The rapidly stoppable electric machine of claim 9 wherein said connection ring is made of a magnetically permeable material.