阅读说明：本技术 一种高速电机轴承轴向压力控制方法 (Axial pressure control method for high-speed motor bearing ) 是由 陈建新 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种高速电机轴承轴向压力控制方法,高速电机轴承包括机壳、设置在机壳前部的前端盖,前端盖内插设有电机轴,且电机轴上位于前端盖内套设有波形垫片,前端盖侧端开口内壁上设有内螺纹槽,电机轴上套设有轴承压盖,轴承压盖外壁上设有外螺纹,轴承压盖内侧设置有压环板,轴承压盖与压环板之间设置有顶推组件。通过对螺母位于调节螺杆上的位置进行调节,进而对复位弹簧的弹簧拉力进行调节,复位弹簧经圈板和活动杆对压环板产生水平方向的推力,并在外螺纹、内螺纹槽、环形螺槽和内螺纹环罩的配合下,使压环板控制波形垫片的形变量,达到电机轴的轴向预紧力一致的目的,最终可以确保电机轴承使用寿命一致的功能。(The invention discloses a high-speed motor bearing axial pressure control method, wherein the high-speed motor bearing comprises a machine shell and a front end cover arranged at the front part of the machine shell, a motor shaft is inserted in the front end cover, a corrugated gasket is sleeved in the front end cover on the motor shaft, an inner thread groove is arranged on the inner wall of an opening at the side end of the front end cover, a bearing gland is sleeved on the motor shaft, an external thread is arranged on the outer wall of the bearing gland, a pressure ring plate is arranged on the inner side of the bearing gland, and a pushing assembly is arranged between the bearing gland and the pressure ring plate. The position of the nut on the adjusting screw rod is adjusted, and then the spring tension of the reset spring is adjusted, the reset spring generates horizontal thrust to the pressing ring plate through the ring plate and the movable rod, and the pressing ring plate controls the deformation amount of the waveform gasket under the matching of the external thread, the internal thread groove, the annular spiral groove and the internal thread ring cover, so that the purpose of the consistency of the axial pretightening force of the motor shaft is achieved, and the function of the consistency of the service life of the motor bearing can be finally ensured.)

1. A high-speed motor bearing axial pressure control method is characterized in that:

the high-speed motor bearing comprises a machine shell (1) and a front end cover (2) arranged at the front part of the machine shell (1), a motor shaft (3) is inserted into the front end cover (2), a corrugated gasket (4) is sleeved in the front end cover (2) on the motor shaft (3), an inner threaded groove (5) is formed in the inner wall of an opening at the side end of the front end cover (2), a bearing gland (6) is sleeved on the motor shaft (3), an external thread (7) is formed in the outer wall of the bearing gland (6), the bearing gland (6) is inserted in the inner threaded groove (5) in a threaded manner through the external thread (7), a pressure ring plate (8) is arranged on the inner side of the bearing gland (6), a pushing component is arranged between the bearing gland (6) and the pressure ring plate (8), and the pressure ring plate (8) is in contact connection with the corrugated gasket (4);

the axial pressure control method of the high-speed motor bearing comprises the following steps:

s1: after the bearing gland (6) is sleeved on the motor shaft (3), the bearing gland is inserted into the internal thread groove (5) through the external thread (7) to enable a pressure ring plate (8) on the inner side of the bearing gland (6) to press the corrugated gasket (4);

s2: detecting the axial pre-tightening force of the motor by using pressure and displacement detection equipment, and if the pre-tightening force is larger, unscrewing an external thread (7) of a bearing gland (6) to reduce the deformation of the waveform gasket (4), thereby reducing the axial pre-tightening force of the motor;

s3: if the pre-tightening force is smaller, the external thread (7) of the bearing gland (6) is tightened, the deformation of the corrugated gasket (4) is increased, and therefore the axial pre-tightening force of the motor is increased.

2. The axial pressure control method for the bearing of the high-speed motor as claimed in claim 1, wherein: the bearing is characterized in that an annular thread groove (9) is formed in the inner wall of the inner thread groove (5), an inner thread ring cover (10) is arranged on the inner side of the bearing gland (6), and the inner thread of the annular thread groove (9) is inserted into the inner thread ring cover (10).

3. The axial pressure control method for the bearing of the high-speed motor as claimed in claim 1, wherein: the motor shaft (3) penetrates through the pressing ring plate (8), and the side surface of the pressing ring plate (8) is in pressing contact with the raised surface of the corrugated gasket (4).

4. The axial pressure control method for the bearing of the high-speed motor as claimed in claim 1, wherein: the pushing assembly comprises at least two movable rods (11) arranged on a pressing ring plate (8), a ring groove (12) is formed in the outer side wall of the bearing gland (6), at least two movable holes (13) are correspondingly formed in the inner wall of the ring groove (12), the outer ends of the movable rods (11) are sequentially inserted into the movable holes (13) and the ring groove (12), and the movable rods (11) extend out of the end sleeves and are provided with reset springs (14).

5. The axial pressure control method for the bearing of the high-speed motor as claimed in claim 4, wherein the axial pressure control method comprises the following steps: circle groove (12) interpolation is equipped with circle board (15), corresponds on circle board (15) and is equipped with perforation (16), and movable rod (11) outer end is provided with adjusting screw (17), and adjusting screw (17) outer end runs through in perforation (16) and locks through nut (18), reset spring (14) both ends set up respectively on circle groove (12) inner wall and circle board (15) lateral wall.

6. The axial pressure control method for the bearing of the high-speed motor as claimed in claim 1, wherein: the motor shaft (3) up end is equipped with recess (19), is provided with scale plate (20) in recess (19), bearing gland (6) stretch into the displacement and correspond with the scale value on scale plate (20).

Technical Field

The invention belongs to the technical field of medical instrument motors, and particularly relates to a high-speed motor bearing axial pressure control method.

Background

In the field of medical appliance motors, a brushless direct current variable frequency motor is often used, the brushless direct current variable frequency motor consists of a motor main body and a driver, and is a typical electromechanical integrated product.

The existing brushless direct current motor is designed in an integrated mode, the purpose of adjusting the axial pressure of the wave-shaped gasket is achieved by increasing or decreasing the quantity of the gaskets, and in the motor assembling process, due to the fact that the deformation of the wave-shaped gasket of the motor is inconsistent due to the influence of machining precision of the front end cover, the rear end cover, the machine shell and the rotating shaft, the axial pre-tightening force difference of the motor is obvious, the service life of a bearing is inconsistent, the service life of the motor is not controllable, and the like.

Disclosure of Invention

The invention aims to provide a method for controlling axial pressure of a high-speed motor bearing, which aims to solve the problem that deformation of a waveform gasket cannot be controlled by a component on a motor shaft in the prior art, and the problem of consistent axial pre-tightening force of a motor is solved.

In order to achieve the purpose, the invention provides the following technical scheme: the high-speed motor bearing comprises a machine shell and a front end cover arranged at the front part of the machine shell, wherein a motor shaft is inserted in the front end cover, a corrugated gasket is sleeved in the front end cover on the motor shaft, an inner threaded groove is formed in the inner wall of an opening at the side end of the front end cover, a bearing gland is sleeved on the motor shaft, an external thread is arranged on the outer wall of the bearing gland, the bearing gland is inserted in the inner threaded groove through the threaded connection of the external thread, a pressure ring plate is arranged on the inner side of the bearing gland, a pushing component is arranged between the bearing gland and the pressure ring plate, and the pressure ring plate is in contact connection with the corrugated gasket.

The axial pressure control method of the high-speed motor bearing comprises the following steps:

s1: after the bearing gland is sleeved on a motor shaft, the bearing gland is inserted into the internal thread groove through the external thread, so that the pressure ring plate on the inner side of the bearing gland bears the waveform gasket;

s2: detecting the axial pretightening force of the motor by using pressure and displacement detection equipment, and loosening the external thread of the bearing gland if the pretightening force is larger, so as to reduce the deformation of the waveform gasket and further reduce the axial pretightening force of the motor;

s3: if the pre-tightening force is smaller, the external thread of the bearing gland is tightened, the deformation of the corrugated gasket is increased, and therefore the axial pre-tightening force of the motor is increased.

Preferably, an annular thread groove is formed in the inner wall of the internal thread groove, an internal thread ring cover is arranged on the inner side of the bearing gland, and an internal thread ring cover is inserted into the internal thread of the annular thread groove.

Preferably, the motor shaft penetrates through the pressure ring plate, and the side surface of the pressure ring plate is in pressing contact with the raised surface of the corrugated gasket.

The waveform gasket can be subjected to constant pressure fixation through the pressure ring plate, so that the deformation quantity of the waveform gasket is controlled, and the purpose of consistent axial pretightening force of the motor is achieved.

Preferably, the top pushes away the subassembly including setting up two at least movable rods on the clamping ring board, be equipped with the circle groove on the bearing cover lateral wall, correspond on the circle inslot wall and be equipped with two at least movable holes, the movable rod outer end is inserted in proper order and is established in movable hole and circle inslot, and the movable rod stretches out the pot head and is equipped with reset spring, circle inslot interpolation is equipped with the circle board, corresponds on the circle board and is equipped with the perforation, and the movable rod outer end is provided with adjusting screw, and the adjusting screw outer end runs through in the perforation and through nut locking, the reset spring both ends set up respectively on circle inslot wall and circle board lateral wall.

Through the cooperation of reset spring and movable rod, make the clamping ring board evenly extrude the wave form gasket to under the cooperation of nut and adjusting screw, adjust reset spring's compressive capacity.

Preferably, a groove is formed in the upper end face of the motor shaft, a scale plate is arranged in the groove, and the extending displacement of the bearing gland corresponds to the scale value on the scale plate.

Through observing the position scale of scale plate and bearing gland outer end, be convenient for carry out accurate control to bearing gland volume of stretching into.

Compared with the prior art, the invention has the beneficial effects that: the position of the nut on the adjusting screw rod is adjusted, and then the spring tension of the reset spring is adjusted, the reset spring generates horizontal thrust to the pressing ring plate through the ring plate and the movable rod, and the pressing ring plate controls the deformation amount of the waveform gasket under the matching of the external thread, the internal thread groove, the annular spiral groove and the internal thread ring cover, so that the purpose of the consistency of the axial pretightening force of the motor shaft is achieved, and the function of the consistency of the service life of the motor bearing can be finally ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a schematic view of the front end cap, motor shaft and bearing gland structure of the present invention;

FIG. 4 is a front cross-sectional view of the present invention;

FIG. 5 is an enlarged view of a portion a of FIG. 2;

FIG. 6 is an enlarged view of the point b in FIG. 3;

fig. 7 is an enlarged schematic view of fig. 4 at c.

In the figure: 1. a housing; 2. a front end cover; 3. a motor shaft; 4. a wave-shaped gasket; 5. an internal thread groove; 6. a bearing gland; 7. an external thread; 8. a ring pressing plate; 9. an annular thread groove; 10. an internal thread ring cover; 11. a movable rod; 12. a ring groove; 13. a movable hole; 14. a return spring; 15. a ring plate; 16. perforating; 17. adjusting the screw rod; 18. a nut; 19. a groove; 20. a scale plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-7, a method for controlling axial pressure of a high-speed motor bearing includes a housing 1, and a front end cover 2 disposed at a front portion of the housing 1, a motor shaft 3 is inserted into the front end cover 2, a wave washer 4 is sleeved on the motor shaft 3 in the front end cover 2, an inner threaded groove 5 is disposed on an inner wall of an opening at a side end of the front end cover 2, a bearing gland 6 is sleeved on the motor shaft 3, an external thread 7 is disposed on an outer wall of the bearing gland 6, the bearing gland 6 is screwed into the inner threaded groove 5 through the external thread 7, a pressure ring plate 8 is disposed on an inner side of the bearing gland 6, a pushing assembly is disposed between the bearing gland 6 and the pressure ring plate 8, and the pressure ring plate 8 is in contact connection with the wave washer 4.

The axial pressure control method of the high-speed motor bearing comprises the following steps:

s1: after the bearing gland 6 is sleeved on the motor shaft 3, the bearing gland is inserted into the internal thread groove 5 through the external thread 7, so that the pressure ring plate 8 on the inner side of the bearing gland 6 presses the corrugated gasket 4;

s2: detecting the axial pretightening force of the motor by using pressure and displacement detection equipment, and if the pretightening force is larger, unscrewing the external thread 7 of the bearing gland 6 to reduce the deformation of the wave-shaped gasket 4 so as to reduce the axial pretightening force of the motor;

s3: if the pretightening force is smaller, the external thread 7 of the bearing gland 6 is screwed to increase the deformation of the wave-shaped gasket 4, so that the axial pretightening force of the motor is increased.

The pressure and displacement detection equipment adopts ZA-2002D type double-channel axial displacement monitoring recorder and an external pressure detector to detect the displacement and the pressure of the bearing gland 6.

Be equipped with annular spiral groove 9 on the 5 inner walls of internal thread groove, 6 inboards of bearing gland are equipped with internal thread ring cover 10, and internal thread ring cover 10 has been inserted to 9 internal threads of annular spiral groove, through the cooperation of internal thread ring cover 10 and annular spiral groove 9, has prolonged the displacement distance of bearing gland 6 in internal thread groove 5, and then has improved the compaction effect of clamping ring plate 8 to wave form gasket 4.

The motor shaft 3 penetrates through the pressure ring plate 8, the side surface of the pressure ring plate 8 is in abutting contact with the raised surface of the corrugated gasket 4, the deformation amount of the corrugated gasket 4 can be controlled, and the purpose of consistent axial pre-tightening force of the motor shaft 3 is achieved.

The pushing assembly comprises two movable rods 11 arranged on the pressure ring plate 8, a ring groove 12 is arranged on the outer side wall of the bearing gland 6, two movable holes 13 are correspondingly arranged on the inner wall of the ring groove 12, the outer ends of the movable rods 11 are sequentially inserted into the movable holes 13 and the ring groove 12, a reset spring 14 is sleeved at the extending end of each movable rod 11, and the reset spring 14 is in a stretching state in an initial state.

The ring groove 12 is internally inserted with a ring plate 15, the ring plate 15 is correspondingly provided with a through hole 16, the outer end of the movable rod 11 is welded with an adjusting screw rod 17, the outer end of the adjusting screw rod 17 penetrates through the through hole 16 and is locked by a nut 18, the stretching deformation of the reset spring 14 is conveniently adjusted by the cooperation of the adjusting screw rod 17 and the nut 18, the outer end of the adjusting screw rod 17 is welded with a pull ring, the pull ring is conveniently sleeved by an external hook rod, and therefore the adjusting screw rod 17 is conveniently rotated. And then the spring tension of the return spring 14 is adjusted, two ends of the return spring 14 are respectively welded on the inner wall of the ring groove 12 and the side wall of the ring plate 15, the return spring 14 generates inward spring tension on the ring plate 15, so that the movable rod 11 pushes the pressure ring plate 8 to press the corrugated gasket 4, and the deformation of the corrugated gasket 4 is conveniently adjusted.

The utility model discloses a bearing cover 6, including motor shaft 3, bearing cover 6, scale plate 20, bearing cover 6, reset spring 14, motor shaft 3 upper end face is equipped with recess 19, bonds again or the spiro union has scale plate 20 in the recess 19, bearing cover 6 stretches into the displacement volume and corresponds with the scale value on scale plate 20, through observing the scale value that scale plate 20 and the outer terminal surface of bearing cover 6 correspond, can know the volume that bearing cover 6 inserted in interior thread groove 5, is convenient for stretch into the displacement volume to bearing cover 6 and carries out accurate regulation and control, and can also mark the spring tension that reset spring 14 was right when different positions on scale plate 20, is convenient for carry out accurate regulation to the axial pretightning force of motor shaft 3.

The working principle of the embodiment is as follows: when the axial pretightening force of the motor shaft 3 is adjusted, firstly, the bearing gland 6 is screwed in the annular screw groove 9 through the internal thread annular cover 10 and is screwed and fixed in the internal thread groove 5 through the external thread 7, so that the pressure ring plate 8 at the inner side of the bearing gland 6 presses the corrugated gasket 4, the axial pretightening force of the motor is detected through a pressure and displacement detection device, if the pretightening force is larger, the external thread 7 of the bearing gland 6 is unscrewed, the deformation of the corrugated gasket 4 is reduced, and the axial pretightening force of the motor is reduced,

if the pretightening force is smaller, the external threads 7 of the bearing gland 6 are screwed, the deformation of the corrugated gasket 4 is increased, so that the axial pretightening force of the motor is increased, meanwhile, the position of the nut 18 on the adjusting screw rod 17 can be adjusted, further, the spring tension of the reset spring 14 is adjusted, the reset spring 14 generates horizontal thrust on the pressing ring plate 8 through the ring plate 15 and the movable rod 11, further, the pressing ring plate 8 controls the deformation of the corrugated gasket 4, and the screwing amount of the bearing gland 6 is accurately controlled by observing the scale value on the scale plate 20, so that the purpose of consistent axial pretightening force of the motor shaft 3 is achieved, and finally, the function of consistent service life of the motor bearing can be ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.