阅读说明：本技术 整装式有限转角力矩电机轴承的预载荷施加结构及施加方法 (Pre-load applying structure and applying method of self-assembled limited corner torque motor bearing ) 是由 谭欣 潘龙飞 王建飞 智豪 高向阳 李学蛟 于 2019-11-12 设计创作，主要内容包括：本发明涉及整装式有限转角力矩电机轴承的预载荷施加结构及施加方法,方法为：S1先将中心轴、第一轴承、第二轴承和转子组件进行组装；S2将内、外锁紧螺母旋装至中心轴的轴端外螺纹段上,调整至最佳位置并做好位置标识；S3拆下内、外锁紧螺母；S4将内锁紧螺母装入转子组件中,旋装至轴端螺纹最底部位置；将螺纹漆均匀涂抹到轴端螺纹上,将内锁紧螺母逆时针缓慢向外旋转,使内锁紧螺母螺纹与轴端螺纹间充分填充螺纹漆,然后将内锁紧螺母缓慢旋至螺纹底部；S5将外锁紧螺母螺纹均匀涂抹螺纹漆,并装配到轴端螺纹上；S6内锁紧螺母逆时针向外拧,外锁紧螺母顺时针向内拧,将内、外锁紧螺母两者对锁锁紧,并分别调整到初始记号位置。本发明达到较好的轴承防松效果。(The invention relates to a preload applying structure and a preload applying method of a self-assembly limited corner torque motor bearing, wherein the method comprises the following steps: s1, assembling the central shaft, the first bearing, the second bearing and the rotor assembly; s2, screwing the inner and outer locking nuts onto the external thread section at the shaft end of the central shaft, adjusting to the optimal position and making position marks; s3, detaching the inner and outer lock nuts; s4, the internal locking nut is installed in the rotor component and screwed to the bottom of the shaft end thread; uniformly coating thread paint on the threads of the shaft end, slowly rotating the inner locking nut anticlockwise outwards to fully fill the thread paint between the threads of the inner locking nut and the threads of the shaft end, and then slowly rotating the inner locking nut to the bottom of the threads; s5, uniformly smearing thread paint on the external locking nut threads, and assembling the external locking nut threads onto the shaft end threads; s6, the inner locking nut is screwed outwards anticlockwise, the outer locking nut is screwed inwards clockwise, the inner locking nut and the outer locking nut are locked in a pair mode, and the inner locking nut and the outer locking nut are adjusted to the initial mark positions respectively. The invention achieves better bearing anti-loosening effect.)

1. The utility model provides a structure is applyed to preloading of self-contained limited angle moment motor bearing which characterized in that: the locking device comprises a central shaft, a first bearing, a second bearing, a rotor assembly, an inner locking nut and an outer locking nut; the central shaft is a hollow shaft structure with a flange at one end and external threads at the shaft end at the other end; the central shaft and the rotor assembly are coaxially arranged, the first bearing and the second bearing are arranged between the central shaft and the rotor assembly, the outer ring cylindrical surface of the first bearing and the outer ring circumferential surface of the second bearing are respectively in contact fit with the inner cavity cylindrical surface of the rotor assembly, the inner ring cylindrical surface of the first bearing and the inner ring circumferential surface of the second bearing are respectively in contact fit with the outer cylindrical surface of the central shaft, the inner end surface of the outer ring of the first bearing and the inner end surface of the outer ring of the second bearing are respectively in compression contact with two ends of a stop in the inner cavity of the rotor assembly, and the outer end surface of the inner ring of the first bearing is in compression contact with; the inner locking nut and the outer locking nut are screwed at the external thread part of the shaft end of the central shaft in an internal and external arrangement mode, the inner locking nut and the outer locking nut tightly press the lock, and a boss arranged on the inner side end of the inner locking nut is tightly pressed and contacted with the outer end face of the inner ring of the second bearing; the outer diameter of the inner locking nut is larger than that of the outer locking nut, and the diameter of the inner locking nut is larger than that of a bearing dust cover on the outer side end of the second bearing.

2. The preload applying structure of a self-assembled limited angle torque motor bearing according to claim 1, wherein: and locking mounting holes for inserting locking operation tools are formed in the outer locking nut and the inner locking nut and positioned outside the outer peripheral surface of the outer locking nut.

3. The preload applying structure of a self-assembled limited angle torque motor bearing according to claim 1, wherein: the inner and outer lock nuts are made of titanium alloy.

4. A method for applying a preload of a self-assembly limited corner torque motor bearing comprises the following steps of:

s1, assembling the central shaft, the first bearing, the second bearing and the rotor assembly;

s2, after the assembly is completed, according to the static friction torque index of the motor, the inner locking nut and the outer locking nut are screwed on the external thread section at the shaft end of the central shaft, adjusted to the optimal position and marked;

s3, detaching the inner and outer lock nuts;

s4, the internal locking nut is installed in the rotor component and screwed to the bottom of the shaft end thread; uniformly coating thread paint on the threads of the shaft end, slowly rotating the inner locking nut anticlockwise outwards to fully fill the thread paint between the threads of the inner locking nut and the threads of the shaft end, and then slowly rotating the inner locking nut to the bottom of the threads;

s5, uniformly smearing thread paint on the external locking nut threads, and assembling the external locking nut threads onto the shaft end threads;

s6, the inner locking nut is screwed outwards anticlockwise, the outer locking nut is screwed inwards clockwise, the inner locking nut and the outer locking nut are locked and locked by a tool such as clamp spring pliers or torque wrenches, the inner locking nut and the outer locking nut are adjusted to the positions of initial marks respectively, and the applying process of the preload applying structure is completed.

Technical Field

The invention belongs to a motor assembly technology, relates to a motor bearing preload applying technology, and particularly relates to a preload applying structure and a preload applying method of a self-assembly limited corner torque motor bearing.

Background

The bearing is an important part in mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body. The permanent magnet is one of the key parts for determining the service life, noise and friction torque of the motor. For preventing that the bearing from making it become flexible in the use and leading to the friction torque increase because of the impact vibration of environment, the dead problem of bearing card when serious, need adjust the preload through adjustable bearing limit structure in the assembling process, after adjusting to target in place, still need can not appear becoming flexible in the use. The existing bearing limit structure is difficult to ensure that the bearing cannot be loosened in later use, particularly under the environment of strong impact vibration,

through the search of the prior art, the technical scheme similar to the patent is not searched.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a preload applying structure and a preload applying method of a self-contained limited-angle torque motor bearing.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a structure is applyed to preloading of self-contained limited angle moment motor bearing which characterized in that: the locking device comprises a central shaft, a first bearing, a second bearing, a rotor assembly, an inner locking nut and an outer locking nut; the central shaft is a hollow shaft structure with a flange at one end and external threads at the shaft end at the other end; the central shaft and the rotor assembly are coaxially arranged, the first bearing and the second bearing are arranged between the central shaft and the rotor assembly, the outer ring cylindrical surface of the first bearing and the outer ring circumferential surface of the second bearing are respectively in contact fit with the inner cavity cylindrical surface of the rotor assembly, the inner ring cylindrical surface of the first bearing and the inner ring circumferential surface of the second bearing are respectively in contact fit with the outer cylindrical surface of the central shaft, the inner end surface of the outer ring of the first bearing and the inner end surface of the outer ring of the second bearing are respectively in compression contact with two ends of a stop in the inner cavity of the rotor assembly, and the outer end surface of the inner ring of the first bearing is in compression contact with; the inner locking nut and the outer locking nut are screwed at the external thread part of the shaft end of the central shaft in an internal and external arrangement mode, the inner locking nut and the outer locking nut tightly press the lock, and a boss arranged on the inner side end of the inner locking nut is tightly pressed and contacted with the outer end face of the inner ring of the second bearing; the outer diameter of the inner locking nut is larger than that of the outer locking nut, and the diameter of the inner locking nut is larger than that of a bearing dust cover on the outer side end of the second bearing.

Furthermore, lock mounting holes into which an operation tool for locking is inserted are provided on both the outer lock nut and the inner lock nut on the outer periphery of the outer lock nut.

Moreover, the inner and outer lock nuts are made of titanium alloy.

A method for applying a preload of a self-assembly limited corner torque motor bearing comprises the following steps of:

s1, assembling the central shaft, the first bearing, the second bearing and the rotor assembly;

s2, after the assembly is completed, according to the static friction torque index of the motor, the inner locking nut and the outer locking nut are screwed on the external thread section at the shaft end of the central shaft, adjusted to the optimal position and marked;

s3, detaching the inner and outer lock nuts;

s4, the internal locking nut is installed in the rotor component and screwed to the bottom of the shaft end thread; uniformly coating thread paint on the threads of the shaft end, slowly rotating the inner locking nut anticlockwise outwards to fully fill the thread paint between the threads of the inner locking nut and the threads of the shaft end, and then slowly rotating the inner locking nut to the bottom of the threads;

s5, uniformly smearing thread paint on the external locking nut threads, and assembling the external locking nut threads onto the shaft end threads;

s6, the inner locking nut is screwed outwards anticlockwise, the outer locking nut is screwed inwards clockwise, the inner locking nut and the outer locking nut are locked and locked by a tool such as clamp spring pliers or torque wrenches, the inner locking nut and the outer locking nut are adjusted to the positions of initial marks respectively, and the applying process of the preload applying structure is completed.

The invention has the advantages and positive effects that:

1. the preload applying structure of the invention forms a stronger friction pair for locking through the inner locking nut and the outer locking nut in opposite directions, so that the positions of the inner locking nut and the outer locking nut are almost fixed, thereby avoiding the axial movement of the bearing and improving the integral anti-vibration capability and anti-interference capability of the motor.

2. The diameter of the external locking nut of the preload applying structure is slightly larger than that of the bearing dust cover, so that foreign matters can be prevented from entering the bearing dust cover to a certain extent in the processes of assembly, test and transportation, and the reliability of the motor is improved.

3. The preload applying structure has the advantages of compact size, simple structure, convenience in installation and good sealing property.

4. The application method can be realized by adopting a common construction tool, and has the advantages of simple operation and convenient realization.