CN108718122A - A kind of motor for taking into account high speed and low-speed performance - Google Patents

Abstract

The invention discloses a kind of motors for taking into account high speed and low-speed performance, when motor forward or reverse starts, the set rotation of rotor banding moving axis, since axle sleeve is internally provided with and the matched internal thread of external screw thread on machine shaft, axle sleeve first rises along machine shaft, and drives rotor movable upwards, and rotor is made to misplace with stator, contact area is reduced, and motor has preferable high speed performance at this time；When motor is started with another steering, axle sleeve first declines along machine shaft, and drive rotor movable downwards, rotor is set to be aligned with stator, contact area is big, motor has preferable low-speed performance at this time, motor high speed performance and the compatibility issue of low-speed performance are well solved, limiting device is additionally provided with to limit the amplitude of axle sleeve rotation and lifting, ensures that the relative position of rotor and stator, motor construction are reasonable, manufacture craft is simple, it drives rotor to lift by axle sleeve, can effectively reduce the swing of rotor, motor operation is steady.

Description

A motor with both high-speed and low-speed performance

technical field

The invention relates to the field of motor structure, in particular to a motor with both high-speed and low-speed performances.

Background technique

Motor (English: Electric machinery, commonly known as "motor") refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machines. A motor can usually only choose between high-speed performance and low-speed performance, and the performance of the motor stator and rotor will be determined once the motor stator and rotor are manufactured. By changing the position of the rotor, low-speed performance and high-speed performance can be switched. When the stator coil on the stator is aligned with the magnetic steel on the rotor and the contact area is large, the low-speed performance of the motor is good; when the stator coil and the magnetic steel on the rotor The high-speed performance of this motor is good when the steel is misaligned and the contact area is reduced. At present, the motors on the market can only choose high-speed performance and give up low-speed performance according to the purpose of the product, or choose low-speed performance and give up high-speed performance. You can’t have both, so the applicability of the motor is often not good enough, and the use is subject to certain restrictions. limit.

Contents of the invention

In order to solve the above problems, the purpose of the present invention is to provide a motor with both high-speed and low-speed performance, which can well solve the compatibility problem of high-speed performance and low-speed performance of the motor, and has a simple manufacturing process and stable operation.

The technical scheme that the present invention solves its problem adopts is:

A motor with both high-speed and low-speed performance, including a stator, a rotor and a motor shaft, the motor shaft is provided with an external thread and a sleeve sleeved on the external thread, and the sleeve is internally provided with the external thread. The internal thread matched with the thread, the rotor is connected with the shaft sleeve, and the motor shaft is also provided with a limiting device that restricts the rotation and lifting of the shaft sleeve. When the motor rotates forward or reversely, the rotor drives the sleeve to rotate. Since the sleeve is provided with an internal thread that matches the external thread on the motor shaft, the sleeve first rises along the shaft of the motor and drives the shaft sleeve. The rotor moves upwards, so that the rotor and the stator are dislocated, and the contact area is reduced. At this time, the motor has better high-speed performance; The rotating shaft descends, and drives the rotor to move downward, so that the rotor is aligned with the stator, and the contact area is large. At this time, the motor has better low-speed performance, which solves the compatibility problem of high-speed performance and low-speed performance of the motor. The finite limit device is used to limit the range of rotation and lifting of the shaft sleeve to ensure the relative position of the rotor and the stator. The motor structure design is reasonable and the manufacturing process is simple. The shaft sleeve is used to drive the rotor up and down, which can effectively reduce the swing of the rotor and ensure the smooth operation of the motor.

Further, the limiting device includes an upper limiting ring and a lower limiting ring buckled on the external thread.

Further, it also includes a motor bearing seat, the motor shaft is placed inside the motor bearing seat, the stator is sleeved on the outside of the motor bearing seat, and the rotor includes a rotor ring sleeved on the outside of the stator and embedded in the motor bearing seat. The magnetic steel inside the rotor ring, the shaft sleeve is connected with the rotor ring through the connecting end cover.

Further, the connection end cover is arranged above or below the motor bearing housing.

Further, one end of the shaft sleeve extends into the motor bearing seat, and an oil bearing is arranged between the end of the shaft sleeve extending into the motor bearing seat and the motor bearing seat.

Further, a first bearing and a second bearing are arranged between the motor shaft and the motor bearing seat.

Further, it also includes a support end cover connected to the motor bearing seat, the support end cover is provided with a mounting part for mounting and fixing the entire motor, and the mounting part is provided with a mounting hole.

The beneficial effects of the present invention are: the present invention adopts a motor with both high-speed and low-speed performance. When the motor is started in forward rotation or reverse rotation, the rotor drives the shaft sleeve to rotate. The external thread on the top matches the internal thread, the bushing first rises along the motor shaft, and drives the rotor to move upward, so that the rotor and the stator are misaligned, and the contact area is reduced. At this time, the motor has better high-speed performance; when the motor is in another When turning to start, the rotor drives the bushing to rotate, and the bushing first descends along the motor shaft, and drives the rotor to move downward, so that the rotor is aligned with the stator, and the contact area is large. At this time, the motor has better The low-speed performance solves the compatibility problem between the high-speed performance and low-speed performance of the motor. A limit device is also set to limit the range of rotation and lifting of the shaft sleeve to ensure the relative position of the rotor and the stator. The motor structure design is reasonable and the manufacturing process is simple. The shaft sleeve is used to drive the rotor up and down, which can effectively reduce the swing of the rotor and ensure the smooth operation of the motor.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and example.

Fig. 1 is a structural cross-sectional view of a motor with both high-speed and low-speed performance of the present invention;

Fig. 2 is an overall appearance diagram of a motor with both high-speed and low-speed performances in accordance with the present invention.

Detailed ways

Embodiment one

Referring to Fig. 1-Fig. 2, a motor of the present invention that takes into account both high-speed and low-speed performance includes a stator 1, a rotor 2 and a motor shaft 3, and the motor shaft 3 is provided with an external thread and a sleeve on the external thread. A shaft sleeve 4, the inside of the shaft sleeve 4 is provided with an internal thread that matches the external thread, the rotor 2 is connected to the shaft sleeve 4, and the motor shaft 3 is also provided with a ring that restricts the rotation of the shaft sleeve 4 The lifting limit device 5 includes an upper limit ring 51 and a lower limit ring 52 buckled on the external thread. When the motor rotates forward or reversely, the rotor 2 drives the shaft sleeve 4 to rotate. Since the shaft sleeve 4 is provided with an internal thread that matches the external thread on the motor shaft 3, the shaft sleeve 4 first moves along the motor shaft. 3 rises, and drives the rotor 2 to move upward, so that the rotor 2 and the stator 1 are dislocated, and the contact area is reduced. At this time, the motor has better high-speed performance; when the motor is started in another direction, the rotor 2 drives the When the shaft sleeve 4 rotates, the shaft sleeve 4 first descends along the motor shaft 3, and drives the rotor 2 to move downward, so that the rotor 2 is aligned with the stator 1, and the contact area is large. At this time, the motor has better low-speed performance and is very good. The compatibility problem between the high-speed performance and the low-speed performance of the motor is perfectly solved, and the limiting device 5 is also set to limit the range of rotation and lifting of the shaft sleeve 4, so as to ensure the relative position of the rotor 2 and the stator 1. The motor structure design is reasonable, and the manufacturing process is simple. Through The shaft sleeve 4 drives the rotor 2 up and down, which can effectively reduce the swing of the rotor 2, and the motor runs smoothly.

Preferably, the motor adopts an outer rotor motor structure, and also includes a motor bearing seat 6, the motor shaft 3 is placed inside the motor bearing seat 6, the stator 1 is sleeved outside the motor bearing seat 6, and the rotor 2 includes a rotor ring 21 sleeved on the outside of the stator 1 and a magnetic steel 22 embedded in the rotor ring 21, the sleeve 4 is connected to the rotor ring 21 through a connecting end cover 7, and the connecting end cover 7 is arranged above or below the motor bearing seat 6.

Due to the threaded fit between the shaft sleeve 4 and the motor shaft 3, the rotor 2 will oscillate to a certain extent when it rotates. In order to further enhance the stability of the motor operation, one end of the shaft sleeve 4 extends into the inside of the motor bearing seat 6, An oil-impregnated bearing 8 is arranged between the end of the shaft sleeve 4 extending into the motor bearing housing 6 and the motor bearing housing 6, and the oil-impregnated bearing 8 is arranged to cooperate with the shaft sleeve 4, which can well limit the swing of the rotor 2. In this way, the stability of the motor operation can be enhanced, and the running noise can also be reduced to a certain extent.

In order to enhance the stability when the motor shaft 3 rotates, a first bearing 31 and a second bearing 32 are arranged between the motor shaft 3 and the motor bearing seat 6, and two bearings can effectively reduce the rotation time of the motor shaft 3. jitter.

In order to facilitate the installation of the motor on the equipment using the motor, it also includes a support end cover 9 connected to the motor bearing seat 6, and the support end cover 9 is provided with a mounting part 91 for installing and fixing the entire motor. The mounting portion 91 is provided with a mounting hole 92 .

Embodiment two

As another embodiment of the present invention, the motor can also adopt an inner rotor motor structure: including a stator, a rotor arranged inside the stator, and a motor shaft, and the motor shaft is provided with external threads and sleeved on the external threads. A shaft sleeve, the interior of the shaft sleeve is provided with an internal thread that matches the external thread, the rotor is connected to the shaft sleeve, and the motor shaft is also provided with a limit device that limits the rotation of the shaft sleeve. The limiting device includes an upper limiting ring and a lower limiting ring buckled on the external thread.

The above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, as long as they achieve the technical effects of the present invention by the same means, they should all belong to the protection scope of the present invention.

Claims (7)

1. A motor with both high-speed and low-speed performance is characterized in that it includes a stator (1), a rotor (2) and a motor shaft (3), and the motor shaft (3) is provided with external threads and is sleeved on the The shaft sleeve (4) on the external thread, the internal thread of the shaft sleeve (4) is provided with the internal thread matching the external thread, the rotor (2) is connected with the shaft sleeve (4), and the motor shaft (3) is also provided with a limiting device (5) that limits the rotation and lifting of the shaft sleeve (4). 2. A motor with both high-speed and low-speed performance according to claim 1, characterized in that the limit device (5) includes an upper limit ring (51) and a lower limit ring fastened on the external thread (52). 3. A motor with both high-speed and low-speed performance according to claim 1, characterized in that it also includes a motor bearing seat (6), and the motor shaft (3) is placed inside the motor bearing seat (6) , the stator (1) is sleeved on the outside of the motor bearing housing (6), the rotor (2) includes a rotor ring (21) sleeved on the outside of the stator (1) and a rotor ring (21) embedded in the rotor ring (21) ) inside the magnetic steel (22), the bushing (4) is connected with the rotor ring (21) through the connecting end cover (7). 4. A motor with both high-speed and low-speed performance according to claim 3, characterized in that, the connecting end cover (7) is arranged above or below the motor bearing housing (6). 5. A motor with both high-speed and low-speed performance according to claim 3, characterized in that one end of the bushing (4) extends into the motor bearing seat (6), and the bushing (4) ) is provided with an oil-impregnated bearing (8) between one end extending into the inside of the motor bearing seat (6) and the motor bearing seat (6). 6. A motor with both high-speed and low-speed performance according to claim 3, characterized in that a first bearing (31) and a Second bearing (32). 7. A motor with both high-speed and low-speed performance according to claim 3, characterized in that it also includes a support end cover (9) connected to the motor bearing seat (6), and the support end cover (9) ) is provided with a mounting part (91) for mounting and fixing the entire motor, and the mounting part (91) is provided with a mounting hole (92).