A vibration-damping motor structure with an elastic interference fit for a rolling bearing

Abstract

The present invention discloses a vibration-damping motor structure with an elastic interference fit for a rolling bearing, which relates to the technical field of motors. The present invention includes a bracket. A upper cavity chamber is formed in the center of the top of the bracket. A lower cavity chamber is formed below the upper cavity chamber in the center of the interior of the bracket. A lower cavity chamber is formed in the center of the bottom of the bracket. An upper cavity chamber is formed above the lower cavity chamber in the center of the interior of the bracket. A circular hole is formed between the upper cavity chamber and the lower cavity chamber in the center of the interior of the bracket. A first rolling bearing is assembled in the upper cavity chamber. A bearing sleeve is assembled in the lower cavity chamber. The present invention improves the stability of the rolling bearing during the operation of the motor, avoids the phenomenon of raceway, makes the motor operation more stable, reduces noise, improves the service life, can play a vibration-damping role, while avoiding the occurrence of inner raceway of the rolling bearing, and improves the vibration-damping effect and the stability of the motor operation.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a vibration damping motor structure with an elastic interference fit of rolling bearings. Background Art

[0002] A motor is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. Its core components include a stator assembly and a rotor assembly. According to the different distributions of the rotor assembly, it can be divided into an inner rotor motor and an outer rotor motor. The outer rotor motor is less common than the inner rotor motor and is mainly used in occasions that require large torque, high speed, and good heat dissipation performance. Therefore, the pressure on the rolling bearings in the outer rotor motor is also greater.

[0003] However, the existing vibration damping motor structure with an elastic interference fit of rolling bearings still has the following defects during use:

[0004] 1. For the convenience of assembling and disassembling and overhauling the motor structure, the assembly of the rolling bearings inside the motor mostly adopts the interference fit method. When the rolling bearings are subjected to greater pressure and accompanied by wear during the operation of the motor, the stability of the interference-fitted rolling bearings will decrease, and then the phenomenon of running rings is likely to occur, resulting in unstable operation of the motor, increased noise, and shortened service life of the rolling bearings.

[0005] 2. To improve the vibration damping effect during the operation of the motor, a compression spring is installed on the end face of the inner ring of the rolling bearing. However, the contact surface between the spring end face and the end face of the inner ring of the rolling bearing is very limited, and an elastic force is generated on the end face of the inner ring of the rolling bearing, resulting in the phenomenon of running inner rings easily, and then leading to poor vibration damping effect. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems that in the simple interference fit of the rolling bearings, when the rolling bearings are subjected to greater pressure, the phenomenon of running rings is likely to occur, resulting in unstable operation of the motor, increased noise, and shortened service life of the rolling bearings, and directly installing a compression spring makes the rolling bearings prone to running inner rings, thus leading to poor vibration damping effect. The present invention provides a vibration damping motor structure with an elastic interference fit of rolling bearings.

[0007] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0008] A vibration damping motor structure with an elastic interference fit of rolling bearings includes a bracket. A upper cavity chamber is provided in the center of the top of the bracket. A lower cavity chamber is provided below the upper cavity chamber in the center of the interior of the bracket. A lower cavity chamber is provided in the center of the bottom of the bracket. An upper cavity chamber is provided above the lower cavity chamber in the center of the interior of the bracket. A circular hole is provided between the upper cavity chamber and the lower cavity chamber in the center of the interior of the bracket.

[0009] Inside the upper cavity of the upper cavity, a first rolling bearing is assembled. Inside the lower cavity of the lower cavity, a bearing sleeve is assembled. Between the top end of the bearing sleeve and the inner wall above the upper cavity of the lower cavity, a first spring is assembled. Inside the bottom of the bearing sleeve, a second rolling bearing is assembled. Between the upper part of the second rolling bearing and the inner wall of the bearing sleeve, a gasket is assembled. A motor shaft penetrates through the inside of the first rolling bearing and the second rolling bearing. Below the second rolling bearing around the motor shaft, a shaft retaining ring is clamped. Around the top of the bracket, a stator assembly is fixedly installed. Around the top of the motor shaft, a rotor body is fixedly installed. At the bottom of the bearing sleeve, an adsorption assembly is provided.

[0010] Further, the first rolling bearing and the inner wall of the upper cavity of the upper cavity, the bearing sleeve and the inner wall of the lower cavity of the lower cavity, and the second rolling bearing and the inner wall of the bearing sleeve are all in interference fit.

[0011] Further, the periphery of the top of the upper cavity of the lower cavity is recessed upward, and the middle part of the top of the bearing sleeve protrudes upward, so as to facilitate the stable assembly of the first spring.

[0012] Further, the inner side wall of the bottom of the bearing sleeve is evenly provided with sliding grooves, and the periphery of the second rolling bearing is evenly fixedly connected with sliding columns. The sliding grooves are adapted to the sliding columns, which is convenient for the stable assembly of the second rolling bearing inside the bottom of the bearing sleeve.

[0013] Further, an annular groove is provided around the motor shaft, and the annular groove is used for the assembly and clamping of the shaft retaining ring to ensure the stability after the shaft retaining ring is assembled.

[0014] Further, the adsorption assembly includes suction holes. The inside of the bottom of the bearing sleeve is evenly provided with suction holes. One end of the suction hole extends to the inner cavity of the bearing sleeve, and the other end is bent vertically downward inside the bearing sleeve, and air can be extracted from the inner wall of the bearing sleeve. Below the suction holes inside the bearing sleeve, a cylinder is provided. The cylinder is communicated with the suction holes. A piston is slidably connected inside the cylinder. By using the movement of the piston inside the cylinder, air can be extracted through the suction holes. Below the cylinders at the bottom of the bearing sleeve, installation grooves are evenly provided. Inside the installation grooves, a trigger plate is slidably connected with a limit. And the top end of the inner side of the trigger plate is fixedly installed with the piston, so that the trigger plate can drive the piston to move up and down. In the middle of the top end of the trigger plate, a limit post is fixedly installed. The top of the limit post extends upward into the bearing sleeve and is slidably connected with the bearing sleeve. And between the top end of the limit post and the inner wall of the bearing sleeve, a second spring is fixedly connected.

[0015] Further, circular grooves are evenly formed on the periphery of the second rolling bearing. The number of the circular grooves is the same as that of the suction holes inside the bearing sleeve. After the second rolling bearing is assembled with the bearing sleeve through the cooperation of the sliding columns and the sliding grooves, the ports of the circular grooves and the suction holes on the inner wall of the bearing sleeve are aligned, so that the air inside the circular grooves can be extracted through the suction holes.

[0016] Further, the trigger plate extends outward to the outside of the bearing sleeve. Limiting grooves are evenly formed on the outside below the lower cavity chamber at the bottom of the bracket. The limiting grooves are adapted to the outer side area of the trigger plate and have the same number, so that the bearing sleeve can be positioned and assembled through the cooperation of the trigger plate and the limiting grooves. At the same time, when the trigger plate contacts the upper side wall of the limiting groove, and the bearing sleeve continues to move upward, the trigger plate will move downward relative to the bearing sleeve under the action of the reaction force of the limiting groove.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, through the action of the adsorption component between the inside of the bearing sleeve and the second rolling bearing, after the assembly is completed, an atmospheric pressure towards the inner wall of the bearing sleeve can be generated on the second rolling bearing, improving the stability of the second rolling bearing during the operation of the motor, avoiding the phenomenon of running circles, making the motor operate more smoothly, reducing noise, and increasing the service life.

[0019] 2. In the present invention, through the assembly of the bearing sleeve and the second rolling bearing, and the action of the first spring between the upper part of the bearing sleeve and the upper inner wall of the upper cavity of the lower cavity, the gasket can play a vibration damping role. At the same time, the first spring does not directly contact the second rolling bearing, but contacts the bearing sleeve and generates a buffering effect, avoiding the phenomenon of the second rolling bearing running inner circles, and improving the vibration damping effect and the stability of the motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic three-dimensional structure of the present invention Figure 1 ;

[0021] Figure 2 is a schematic three-dimensional structure of the present invention Figure 2 ;

[0022] Figure 3 is a schematic three-dimensional sectional structure diagram of a part of the present invention;

[0023] Figure 4 is a schematic three-dimensional sectional structure diagram of the bracket and its interior of the present invention;

[0024] Figure 5 is a schematic three-dimensional sectional structure diagram of the bracket of the present invention;

[0025] Figure 6 is a schematic three-dimensional sectional structure diagram of the bearing sleeve and the second rolling bearing of the present invention;

[0026] Figure 7 is an exploded three-dimensional structure of the bearing sleeve and rolling bearing of the present invention Figure 1 ;

[0027] Figure 8 is an exploded three-dimensional structure of the bearing sleeve and rolling bearing of the present invention Figure 2 ;

[0028] Figure 9 is a schematic diagram of the three-dimensional structure of the bearing sleeve of the present invention;

[0029] Figure 10 is a schematic diagram of the sectional three-dimensional structure of the bearing sleeve of the present invention.

[0030] Reference numerals: 1, bracket; 1a, upper cavity upper chamber; 1b, upper cavity lower chamber; 1c, lower cavity lower chamber; 1d, lower cavity upper chamber; 1e, round hole; 1f, limit groove; 2, rolling bearing one; 3, bearing sleeve; 3a, chute; 4, spring one; 5, rolling bearing two; 5a, sliding column; 5b, round groove; 6, gasket; 7, shaft retaining ring; 8, motor shaft; 8a, annular groove; 9, stator assembly; 10, rotor body; 11, adsorption assembly; 111, suction hole; 112, cylinder; 113, piston; 114, installation groove; 115, trigger plate; 116, limit post; 117, spring two. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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.

[0032] A rolling bearing elastic interference fit vibration damping motor structure according to a preferred embodiment of the present invention will be elaborated in detail below, as Figures 1 - 5 shown, a rolling bearing elastic interference fit vibration damping motor structure includes a bracket 1. An upper cavity upper chamber 1a is opened in the center of the top of the bracket 1. A lower cavity lower chamber 1b is opened below the upper cavity upper chamber 1a in the center of the interior of the bracket 1. A lower cavity lower chamber 1c is opened in the center of the bottom of the bracket 1. A lower cavity upper chamber 1d is opened above the lower cavity lower chamber 1c in the center of the interior of the bracket 1. A round hole 1e is opened between the upper cavity lower chamber 1b and the lower cavity upper chamber 1d in the center of the interior of the bracket 1.

[0033] Inside the upper cavity upper chamber 1a, a rolling bearing one 2 is assembled. Inside the lower cavity lower chamber 1c, a bearing sleeve 3 is assembled. Between the top end of the bearing sleeve 3 and the inner wall above the upper part of the lower cavity upper chamber 1d, a spring one 4 is assembled. The periphery of the top of the lower cavity upper chamber 1d is recessed upward, and the middle part of the top of the bearing sleeve 3 protrudes upward, so as to facilitate the stable assembly of the spring one 4. Inside the bottom of the bearing sleeve 3, a rolling bearing two 5 is assembled. The rolling bearing one 2 and the inner wall of the upper cavity upper chamber 1a, the bearing sleeve 3 and the inner wall of the lower cavity lower chamber 1c, and the rolling bearing two 5 and the inner wall of the bearing sleeve 3 are all in interference fit.

[0034] Between the upper part of the rolling bearing two 5 and the inner wall of the bearing sleeve 3, a gasket 6 is assembled. Through the rolling bearing one 2 and the rolling bearing two 5, a motor shaft 8 is assembled. Below the rolling bearing two 5 on the periphery of the motor shaft 8, a shaft retaining ring 7 is clamped. On the periphery of the top of the bracket 1, a stator assembly 9 is fixedly installed. On the periphery of the top of the motor shaft 8, a rotor body 10 is fixedly installed. At the bottom of the bearing sleeve 3, an adsorption assembly 11 is provided.

[0035] As Figures 6 - 9 shown, on the inner side wall of the bottom of the bearing sleeve 3, sliding grooves 3a are evenly opened. On the periphery of the rolling bearing two 5, sliding columns 5a are evenly fixedly connected. The sliding grooves 3a and the sliding columns 5a are adapted to each other, which is convenient for the stable assembly of the rolling bearing two 5 inside the bottom of the bearing sleeve 3.

[0036] On the periphery of the motor shaft 8, an annular groove 8a is opened. The annular groove 8a is used for the assembly and clamping of the shaft retaining ring 7 to ensure the stability after the assembly of the shaft retaining ring 7.

[0037] As Figure 5 、 Figure 6 、 Figure 9 、 Figure 10 shown, the adsorption assembly 11 includes suction holes 111. Inside the bottom of the bearing sleeve 3, suction holes 111 are evenly opened. One end of the suction hole 111 extends to the inner cavity of the bearing sleeve 3, and the other end is bent vertically downward inside the bearing sleeve 3, which can extract air from the inner wall of the bearing sleeve 3. On the periphery of the rolling bearing two 5, round grooves 5b are evenly opened. The number of the round grooves 5b is the same as that of the suction holes 111 inside the bearing sleeve 3. After the rolling bearing two 5 is assembled with the bearing sleeve 3 through the cooperation of the sliding columns 5a and the sliding grooves 3a, the round grooves 5b and the ports of the suction holes 111 on the inner wall of the bearing sleeve 3 are aligned, so that the air inside the round grooves 5b can be extracted through the suction holes 111.

[0038] Below the suction holes 111 inside the bearing sleeve 3, a cylinder 112 is provided. The cylinder 112 is in communication with the suction holes 111. A piston 113 is slidably connected inside the cylinder 112. By using the movement of the piston 113 inside the cylinder 112, air can be extracted through the suction holes 111. Installation grooves 114 are provided below the cylinders 112 at the bottom of the bearing sleeve 3. A trigger plate 115 is slidably connected inside the installation grooves 114 in a limited manner. And the top end of the inner side of the trigger plate 115 is fixedly installed with the piston 113, so that the trigger plate 115 can drive the piston 113 to move up and down. A limit post 116 is fixedly installed in the middle of the top end of the trigger plate 115. The top of the limit post 116 extends upward into the bearing sleeve 3 and is slidably connected with the bearing sleeve 3. And a second spring 117 is fixedly connected between the top end of the limit post 116 and the inner wall of the bearing sleeve 3.

[0039] The trigger plate 115 extends outward to the outside of the bearing sleeve 3. Limit grooves 1f are evenly provided on the outside below the lower cavity 1c of the bottom of the bracket 1. The limit grooves 1f are adapted to the outer area of the trigger plate 115 and have the same number, so that the bearing sleeve 3 can be positioned and assembled through the cooperation of the trigger plate 115 and the limit grooves 1f. At the same time, when the trigger plate 115 contacts the upper side wall of the limit groove 1f, and the bearing sleeve 3 continues to move upward, the trigger plate 115 will move downward relative to the bearing sleeve 3 under the action of the reaction force of the limit groove 1f.

[0040] During assembly, first assemble the first rolling bearing 2 into the upper cavity 1a. Then complete the assembly of the motor shaft 8 and the rotor body 10, and pass the motor shaft 8 downward through the first rolling bearing 2 and assemble it to the center inside the bracket 1. Then first assemble the gasket 6 inside the bearing sleeve 3, and then use the cooperation between the outer sliding column 5a of the second rolling bearing 5 and the inner side wall chute 3a of the bearing sleeve 3 to position and assemble the second rolling bearing 5 into the bearing sleeve 3 until the gasket 6 is pushed against the upper side wall inside the bearing sleeve 3.

[0041] Then assemble the first spring 4 into the lower cavity 1d from below the bracket 1. After the assembly is completed, then assemble the bearing sleeve 3 carrying the second rolling bearing 5 upward from below the bracket 1, so that the bearing sleeve 3 compresses the first spring 4 upward, and the trigger plate 115 on the outer side of the bottom of the bearing sleeve 3 is aligned with the limit groove 1f. At the same time, the second rolling bearing 5 can also be assembled to the outside of the motor shaft 8. After the assembly of the second rolling bearing 5 is completed, use the annular groove 8a provided on the outer periphery of the motor shaft 8 to assemble and snap the shaft retaining ring 7 on the outer periphery of the motor shaft 8, and at the same time below the second rolling bearing 5 to limit the second rolling bearing 5. Thus, the assembly of the first rolling bearing 2 and the second rolling bearing 5 on the motor shaft 8 inside the bracket 1 is completed.

[0042] During operation, while the spacer 6 and the first spring 4 can be used for vibration damping, the first spring 4 does not directly contact the second rolling bearing 5, but contacts the bearing sleeve 3 to produce a buffering effect, avoiding the phenomenon of inner race running of the second rolling bearing 5, improving the vibration damping effect and the stability of the motor operation.

[0043] When assembling the bearing sleeve 3 with the second rolling bearing 5 upward, when the trigger plate 115 on the outer side of the bearing sleeve 3 moves upward to contact the upper inner wall of the limit groove 1f, and the bearing sleeve 3 continues to move upward, the trigger plate 115 will move downward relative to the bearing sleeve 3 under the action of the reaction force of the inner wall of the limit groove 1f, thereby driving the piston 113 to move downward inside the cylinder 112, and can extract the air inside the circular groove 5b between the second rolling bearing 5 and the inner wall of the bearing sleeve 3 through the suction hole 111, so that a negative air pressure is generated between the second rolling bearing 5 and the inner wall of the bearing sleeve 3. Then, under the action of the atmospheric pressure, the second rolling bearing 5 can be more closely attached to the inner wall of the bearing sleeve 3, rather than relying solely on the interference fit, improving the stability of the second rolling bearing 5 during the operation of the motor, avoiding the phenomenon of race running, making the motor operation more stable, reducing noise, and increasing the service life.

[0044] When disassembling the bearing sleeve 3, push the bearing sleeve 3 downward, and the trigger plate 115 and the limit post 116 will move upward relative to the bearing sleeve 3 under the action of the second spring 117, thereby pushing the piston 113 to move upward inside the cylinder 112, relieving the atmospheric pressure difference, facilitating the subsequent disassembly of the second rolling bearing 5, and at the same time facilitating the extraction of the air inside the circular groove 5b again by using the cooperation between the piston 113 and the cylinder 112 during re-assembly.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An elastic interference fit vibration damping motor structure for a rolling bearing, comprising a bracket (1), characterized in that, A central upper cavity chamber (1a) is provided at the top of the bracket (1). A lower cavity chamber (1b) is provided below the central upper cavity chamber (1a) inside the bracket (1). A lower cavity chamber (1c) is provided at the center of the bottom of the bracket (1). An upper cavity chamber (1d) is provided above the central lower cavity chamber (1c) inside the bracket (1). A round hole (1e) is provided between the central upper cavity lower chamber (1b) and the lower cavity upper chamber (1d) inside the bracket (1). A rolling bearing one (2) is assembled inside the upper cavity chamber (1a). A bearing sleeve (3) is assembled inside the lower cavity chamber (1c). A first spring (4) is assembled between the top end of the bearing sleeve (3) and the inner wall above the upper part of the lower cavity upper chamber (1d). A rolling bearing two (5) is assembled inside the bottom of the bearing sleeve (3). A gasket (6) is assembled between the upper part of the rolling bearing two (5) and the inner wall of the bearing sleeve (3). A motor shaft (8) is assembled through the inside of the rolling bearing one (2) and the rolling bearing two (5). A shaft retaining ring (7) is clamped below the rolling bearing two (5) on the periphery of the motor shaft (8). A stator assembly (9) is fixedly installed on the periphery of the top of the bracket (1). A rotor body (10) is fixedly installed on the periphery of the top of the motor shaft (8). An adsorption assembly (11) is provided at the bottom of the bearing sleeve (3). The adsorption assembly (11) includes: Suction holes (111), the suction holes (111) are evenly provided inside the bottom of the bearing sleeve (3). One end of the suction hole (111) extends to the inner cavity of the bearing sleeve (3), and the other end is bent vertically downward inside the bearing sleeve (3). A cylinder (112), a cylinder (112) is provided below the suction hole (111) inside the bearing sleeve (3). The cylinder (112) is communicated with the suction hole (111). A piston (113), the piston (113) is slidably connected inside the cylinder (112). Installation grooves (114), installation grooves (114) are provided below the cylinder (112) at the bottom of the bearing sleeve (3). A trigger plate (115), the trigger plate (115) is slidably connected with limited position inside the installation groove (114), and the top end of the inner side of the trigger plate (115) is fixedly installed with the piston (113). A limit post (116), the middle part of the top end of the trigger plate (115) is fixedly installed with a limit post (116). A second spring (117), the top of the limit post (116) extends upward into the inside of the bearing sleeve (3) and is slidably connected with the bearing sleeve (3), and a second spring (117) is fixedly connected between the top end of the limit post (116) and the inner wall of the bearing sleeve (3).

2. The elastic interference fit damping motor structure of the rolling bearing according to claim 1, characterized in that The rolling bearing one (2) and the inner wall of the upper cavity chamber (1a), the bearing sleeve (3) and the inner wall of the lower cavity chamber (1c), and the rolling bearing two (5) and the inner wall of the bearing sleeve (3) are all in interference fit.

3. The elastic interference fit vibration damping motor structure of the rolling bearing according to claim 1, characterized in that, The top periphery of the upper chamber (1d) of the lower cavity is recessed upward, and the middle part of the top of the bearing sleeve (3) protrudes upward, so as to facilitate the stable assembly of the first spring (4).

4. The rolling bearing elastic interference fit vibration damping motor structure according to claim 1, wherein Chutes (3a) are evenly formed in the inner side wall of the bottom of the bearing sleeve (3), and sliding columns (5a) are fixedly connected to the periphery of the second rolling bearing (5) evenly, and the chutes (3a) are adapted to the sliding columns (5a).

5. The elastic interference fit vibration damping motor structure of the rolling bearing according to claim 1, characterized in that An annular groove (8a) is formed in the periphery of the motor shaft (8), and the annular groove (8a) is used for the assembly and clamping of the shaft retaining ring (7).

6. The rolling bearing elastic interference fit vibration damping motor structure according to claim 1, characterized in that Circular grooves (5b) are evenly formed in the periphery of the second rolling bearing (5), and the number of the circular grooves (5b) is the same as that of the suction holes (111) inside the bearing sleeve (3). After the second rolling bearing (5) is assembled with the bearing sleeve (3) through the cooperation of the sliding columns (5a) and the chutes (3a), the ports of the circular grooves (5b) and the suction holes (111) on the inner wall of the bearing sleeve (3) are aligned with each other.

7. The rolling bearing elastic interference fit vibration damping motor structure according to claim 1, characterized in that, The trigger plate (115) extends outward to the outside of the bearing sleeve (3), and limiting grooves (1f) are evenly formed in the outside of the bottom of the lower cavity lower chamber (1c) of the bracket (1), and the limiting grooves (1f) are adapted to the outer area of the trigger plate (115) and have the same number.

Images