Vibration reduction motor structure with rolling bearing in elastic interference fit

Abstract

The invention discloses a rolling bearing elastic interference fit vibration reduction motor structure, and relates to the technical field of motors. The device comprises a support, an upper cavity upper chamber is formed in the center of the top of the support, an upper cavity lower chamber is formed below the upper cavity upper chamber in the center of the interior of the support, a lower cavity lower chamber is formed in the center of the bottom of the support, and a lower cavity upper chamber is formed above the lower cavity lower chamber in the center of the interior of the support. A round hole is formed between a lower cavity of the upper cavity and an upper cavity of the lower cavity in the center of the interior of the support, a first rolling bearing is assembled in the upper cavity of the upper cavity, and a bearing sleeve is assembled in the lower cavity of the lower cavity. According to the invention, the stability of the rolling bearing during the operation of the motor is improved, the phenomenon of ring running is avoided, the operation of the motor is more stable, the noise is reduced, the service life is prolonged, the vibration reduction effect can be achieved, the rolling bearing is prevented from running into an inner ring, and the vibration reduction effect and the operation stability of the motor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a rolling bearing elastic interference fit vibration reduction motor structure. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its core components include a stator assembly and a rotor assembly. Depending on the distribution of the rotor assembly, it can be divided into an inner rotor motor and an outer rotor motor. Compared with an inner rotor motor, an outer rotor motor is less common and is mainly used in situations that require greater torque, higher speed and good heat dissipation performance. Therefore, the pressure on the rolling bearings in an outer rotor motor will be greater.

[0003] However, the existing rolling bearing elastic interference fit motor structure still has the following defects during use: 1. In order to facilitate the assembly, disassembly and maintenance of the motor structure, the rolling bearings inside the motor are mostly assembled with interference fit. When the rolling bearings are subjected to greater pressure, accompanied by wear during the operation of the motor, the stability of the rolling bearings with interference fit will decrease, and it will be prone to running in circles, causing the motor to run unsteadily, the noise to increase, and the service life of the rolling bearings to be shortened.

[0004] 2. In order to improve the vibration reduction effect during motor operation, a compression spring is installed on the end face of the inner ring of the rolling bearing. However, the contact area 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, which makes it easy for the inner ring to run, resulting in poor vibration reduction effect. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the simple interference fit of the above-mentioned rolling bearing may cause the rolling bearing to run in circles when the pressure it is subjected to is relatively large, resulting in unstable operation of the motor, increased noise, and shortened service life of the rolling bearing, and the direct installation of a compression spring may cause the rolling bearing to run in the inner circle, which in turn leads to poor vibration reduction effect. The present invention provides a rolling bearing elastic interference fit vibration reduction motor structure.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A rolling bearing elastic interference fit vibration reduction motor structure, comprising a bracket, wherein an upper cavity upper chamber is opened in the center of the top of the bracket, an upper cavity lower chamber is opened below the upper cavity upper chamber in the center of the bracket, a lower cavity lower chamber is opened in the center of the bottom of the bracket, a lower cavity upper chamber is opened above the lower cavity lower chamber in the center of the bracket, and a circular hole is opened between the upper cavity lower chamber and the lower cavity upper chamber in the center of the bracket; A rolling bearing 1 is installed inside the upper chamber of the upper cavity, a bearing sleeve is installed inside the lower chamber of the lower cavity, a spring 1 is installed between the top of the bearing sleeve and the upper inner wall of the upper chamber of the lower cavity, a rolling bearing 2 is installed inside the bottom of the bearing sleeve, a gasket is installed between the upper part of the rolling bearing 2 and the inner wall of the bearing sleeve, a motor shaft is installed between the inside of the rolling bearing 1 and the rolling bearing 2, a shaft retaining ring is clamped below the rolling bearing 2 on the periphery of the motor shaft, a stator assembly is fixedly installed on the periphery of the top of the bracket, a rotor body is fixedly installed on the periphery of the top of the motor shaft, and an adsorption assembly is provided at the bottom of the bearing sleeve.

[0007] Furthermore, the rolling bearing 1 and the inner wall of the upper cavity, the bearing sleeve and the inner wall of the lower cavity, and the rolling bearing 2 and the inner wall of the bearing sleeve are all interference fit.

[0008] Furthermore, the outer periphery of the top of the upper chamber of the lower cavity is recessed upward, and the middle part of the top of the bearing sleeve is convex upward, thereby facilitating the stable assembly of the spring 1.

[0009] Furthermore, 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, so as to facilitate the stable assembly of the second rolling bearing inside the bottom of the bearing sleeve.

[0010] Furthermore, an annular groove is provided on the periphery of the motor shaft, and the annular groove is used for assembling and clamping the shaft retaining ring to ensure the stability of the shaft retaining ring after assembly.

[0011] Furthermore, the adsorption component includes a suction hole, and the suction holes are evenly opened inside the bottom of the bearing sleeve, 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, so that air can be extracted from the inner wall of the bearing sleeve, and a cylinder is opened below the suction hole inside the bearing sleeve, and the cylinder is connected to the suction hole, and a piston is slidably connected inside the cylinder, and air can be extracted through the suction hole by utilizing the movement of the piston inside the cylinder, and an installation groove is opened below the cylinder at the bottom of the bearing sleeve, and a trigger plate is slidably connected to the internal limit of the installation groove, 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, and a limiting column is fixedly installed in the middle part of the top end of the trigger plate, and the top of the limiting column extends upward to the inside of the bearing sleeve and is slidably connected to the bearing sleeve, and a spring 2 is fixedly connected between the top end of the limiting column and the inner wall of the bearing sleeve.

[0012] Furthermore, circular grooves are evenly opened on the periphery of the second rolling bearing, and the number of the circular grooves is the same as the number 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 column and the sliding groove, the circular grooves are aligned with the ports of the suction holes on the inner wall of the bearing sleeve, so that the air inside the circular grooves can be extracted through the suction holes.

[0013] Furthermore, the trigger plate extends outward to the outside of the bearing sleeve, and limiting grooves are evenly arranged on the outside below the lower chamber of the lower cavity of the bottom of the bracket. The limiting grooves are adapted to the outer area of ​​the trigger plate and are the same in number, so that the bearing sleeve can be positioned and assembled through the trigger plate and the limiting grooves. At the same time, when the trigger plate contacts the upper side wall of the limiting groove, the bearing sleeve continues to move upward, and the trigger plate will move downward relative to the bearing sleeve under the action of the reaction force of the limiting groove.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention, through the effect of the adsorption component between the inside of the bearing sleeve and the second rolling bearing, can generate atmospheric pressure toward the inner wall of the bearing sleeve for the second rolling bearing after assembly, thereby improving the stability of the second rolling bearing when the motor is running, avoiding the phenomenon of running in circles, making the motor run more smoothly, reducing noise, and increasing service life.

[0015] 2. The present invention, through the assembly of the bearing sleeve and the rolling bearing 2, and the action of the spring 1 between the upper part of the bearing sleeve and the upper inner wall of the upper chamber of the lower cavity, can play a vibration reduction role in combination with the gasket. At the same time, the spring 1 does not directly contact the rolling bearing 2, but contacts the bearing sleeve and produces a buffering effect, thereby avoiding the inner ring running of the rolling bearing 2, and improving the vibration reduction effect and the stability of the motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the bracket and its internal section of the present invention; Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the stent of the present invention; Figure 6 It is a schematic diagram of a three-dimensional structure of a bearing sleeve and a rolling bearing according to the present invention; Figure 7 The bearing sleeve and rolling bearing three-dimensional structure explosion Figure 1 ; Figure 8The bearing sleeve and rolling bearing three-dimensional structure explosion Figure 2 ; Fig. 9 It is a schematic diagram of the three-dimensional structure of the bearing sleeve of the present invention; Fig.10 It is a schematic diagram of the cross-sectional three-dimensional structure of the bearing sleeve of the present invention.

[0017] Figure numerals: 1, bracket; 1a, upper chamber of upper cavity; 1b, lower chamber of upper cavity; 1c, lower chamber of lower cavity; 1d, upper chamber of lower cavity; 1e, circular hole; 1f, limit groove; 2, rolling bearing one; 3, bearing sleeve; 3a, slide groove; 4, spring one; 5, rolling bearing two; 5a, slide column; 5b, circular 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, mounting groove; 115, trigger plate; 116, limit column; 117, spring two. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] A rolling bearing elastic interference fit vibration reduction motor structure according to a preferred embodiment of the present invention will be described in detail below. Figure 1-Figure 5 As shown, a rolling bearing elastic interference fit vibration reduction motor structure includes a bracket 1, an upper cavity upper chamber 1a is opened in the center of the top of the bracket 1, an upper cavity lower chamber 1b is opened below the upper cavity upper chamber 1a in the center 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 bracket 1, and a circular hole 1e is opened between the upper cavity lower chamber 1b and the lower cavity upper chamber 1d in the center of the bracket 1.

[0020] A rolling bearing 2 is assembled inside the upper chamber 1a of the upper cavity, a bearing sleeve 3 is assembled inside the lower chamber 1c of the lower cavity, a spring 4 is assembled between the top of the bearing sleeve 3 and the upper inner wall of the upper chamber 1d of the lower cavity, the outer periphery of the top of the upper chamber 1d of the lower cavity is concave upward, and the middle part of the top of the bearing sleeve 3 is convex upward, so as to facilitate the stable assembly of the spring 4, and a rolling bearing 2 5 is assembled inside the bottom of the bearing sleeve 3, and the rolling bearing 2 and the inner wall of the upper chamber 1a of the upper cavity, the bearing sleeve 3 and the inner wall of the lower chamber 1c of the lower cavity, and the rolling bearing 2 5 and the inner wall of the bearing sleeve 3 are all interference fit.

[0021] A gasket 6 is installed between the top of the rolling bearing 2 5 and the inner wall of the bearing sleeve 3, a motor shaft 8 is installed between the rolling bearing 1 2 and the inside of the rolling bearing 2 5, a shaft retaining ring 7 is clamped on the outer periphery of the motor shaft 8 and below the rolling bearing 2 5, a stator assembly 9 is fixedly installed on the outer periphery of the top of the bracket 1, a rotor body 10 is fixedly installed on the outer periphery of the top of the motor shaft 8, and an adsorption assembly 11 is provided at the bottom of the bearing sleeve 3.

[0022] like Figure 6-Figure 9 As shown, the inner side wall of the bottom of the bearing sleeve 3 is evenly provided with slide grooves 3a, and the periphery of the rolling bearing 2 5 is evenly fixedly connected with slide columns 5a. The slide grooves 3a are adapted to the slide columns 5a, so as to facilitate the stable assembly of the rolling bearing 2 5 inside the bottom of the bearing sleeve 3.

[0023] An annular groove 8a is provided on the periphery of the motor shaft 8, and the annular groove 8a is used for assembling and clamping the shaft retaining ring 7 to ensure the stability of the shaft retaining ring 7 after assembly.

[0024] like Figure 5 , Figure 6 , Fig. 9 , Fig.10 As shown, the adsorption component 11 includes a suction hole 111, and the suction holes 111 are evenly opened 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, so that air can be extracted from the inner wall of the bearing sleeve 3. Circular grooves 5b are evenly opened on the periphery of the rolling bearing 2 5. The number of the circular grooves 5b is the same as the number of the suction holes 111 inside the bearing sleeve 3. After the rolling bearing 2 5 is assembled with the bearing sleeve 3 through the cooperation of the sliding column 5a and the sliding groove 3a, the circular groove 5b is aligned with the port of the suction hole 111 on the inner wall of the bearing sleeve 3, so that the air inside the circular groove 5b can be extracted through the suction hole 111.

[0025] A cylinder 112 is provided below the suction hole 111 inside the bearing sleeve 3, and the cylinder 112 is connected to the suction hole 111. A piston 113 is slidably connected inside the cylinder 112. The movement of the piston 113 inside the cylinder 112 can extract air through the suction hole 111. A mounting groove 114 is provided below the cylinder 112 at the bottom of the bearing sleeve 3. A trigger plate 115 is slidably connected inside the mounting groove 114, and the top 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 limiting column 116 is fixedly installed in the middle of the top of the trigger plate 115. The top of the limiting column 116 extends upward to the inside of the bearing sleeve 3 and is slidably connected to the bearing sleeve 3. A spring 2 117 is fixedly connected between the top of the limiting column 116 and the inner wall of the bearing sleeve 3.

[0026] The trigger plate 115 extends outward to the outside of the bearing sleeve 3, and the outer side below the lower chamber 1c of the lower cavity at the bottom of the bracket 1 is evenly provided with limiting grooves 1f, which are adapted to the outer area of ​​the trigger plate 115 and are the same in number, so that the bearing sleeve 3 can be positioned and assembled through the trigger plate 115 and the limiting grooves 1f. At the same time, when the trigger plate 115 contacts the upper side wall of the limiting groove 1f, the bearing sleeve 3 continues to move upward, and the trigger plate 115 will move downward relative to the bearing sleeve 3 under the action of the reaction force of the limiting groove 1f.

[0027] During assembly, first assemble the rolling bearing 2 to the interior of 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 rolling bearing 2 to the center of the interior of the bracket 1, and then first assemble the gasket 6 inside the bearing sleeve 3, and then use the cooperation between the outer sliding column 5a of the rolling bearing 2 5 and the inner wall sliding groove 3a of the bearing sleeve 3 to position and assemble the rolling bearing 2 5 to the interior of the bearing sleeve 3 until the gasket 6 is pushed to adhere to the upper side wall of the bearing sleeve 3.

[0028] Then, assemble the spring 1 4 to the interior of the upper chamber 1d of the lower cavity from the bottom of the bracket 1. After the assembly is completed, assemble the bearing sleeve 3 carrying the rolling bearing 2 5 from the bottom of the bracket 1 to make the bearing sleeve 3 compress the spring 1 4 upward, and align the trigger plate 115 on the outer side of the bottom of the bearing sleeve 3 with the limiting groove 1f. At the same time, the rolling bearing 2 5 can also be assembled to the outer side of the motor shaft 8. After the assembly of the rolling bearing 2 5 is completed, the annular groove 8a opened on the outer periphery of the motor shaft 8 is used to assemble and clamp the shaft with the retaining ring 7 to the outer periphery of the motor shaft 8, and at the same time, it is located below the rolling bearing 2 5 to limit the rolling bearing 2 5. At this point, the assembly of the rolling bearing 1 2 and the rolling bearing 2 5 inside the bracket 1 and the motor shaft 8 is completed.

[0029] During operation, the gasket 6 and the spring 1 4 can be used to reduce vibration. The spring 1 4 does not directly contact the rolling bearing 2 5, but contacts the bearing sleeve 3 and produces a buffering effect, thereby preventing the rolling bearing 2 5 from running on the inner ring, thereby improving the vibration reduction effect and the stability of the motor operation.

[0030] When the bearing sleeve 3 carrying the rolling bearing 25 is assembled upward, after the trigger plate 115 on the outside of the bearing sleeve 3 moves up to contact the inner wall above the limiting groove 1f, the bearing sleeve 3 continues to move upward, and 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 limiting groove 1f, thereby driving the piston 113 to move downward inside the cylinder 112, and the air inside the circular groove 5b between the rolling bearing 25 and the inner wall of the bearing sleeve 3 can be extracted through the suction hole 111, so that negative air pressure is generated between the rolling bearing 25 and the inner wall of the bearing sleeve 3, and then under the action of atmospheric pressure, the rolling bearing 25 can be more closely attached to the inner wall of the bearing sleeve 3, rather than relying solely on the effect of interference fit, thereby improving the stability of the rolling bearing 25 when the motor is running, avoiding the phenomenon of circling, making the motor run more smoothly, reducing noise, and increasing service life.

[0031] When disassembling the bearing sleeve 3, the bearing sleeve 3 is pushed downward, and the trigger plate 115 and the limit column 116 will move upward relative to the bearing sleeve 3 under the action of the spring 117, thereby pushing the piston 113 to move upward inside the cylinder 112, thereby relieving the atmospheric pressure difference, facilitating the subsequent disassembly of the rolling bearing 5, and at the same time facilitating the extraction of air from the circular groove 5b again by utilizing the cooperation between the piston 113 and the cylinder 112 during reassembly.

[0032] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may 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 the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rolling bearing elastic interference fit vibration reduction motor structure, comprising a bracket (1), characterized in that: An upper cavity upper chamber (1a) is provided in the center of the top of the support (1); an upper cavity lower chamber (1b) is provided below the upper cavity upper chamber (1a) in the center of the support (1); a lower cavity lower chamber (1c) is provided in the center of the bottom of the support (1); a lower cavity upper chamber (1d) is provided above the lower cavity lower chamber (1c) in the center of the support (1); and a circular hole (1e) is provided between the upper cavity lower chamber (1b) and the lower cavity upper chamber (1d) in the center of the support (1); A rolling bearing 1 (2) is installed inside the upper chamber (1a) of the upper cavity, a bearing sleeve (3) is installed inside the lower chamber (1c) of the lower cavity, a spring 1 (4) is installed between the top of the bearing sleeve (3) and the upper inner wall of the upper chamber (1d) of the lower cavity, a rolling bearing 2 (5) is installed inside the bottom of the bearing sleeve (3), a gasket (6) is installed between the upper part of the rolling bearing 2 (5) and the inner wall of the bearing sleeve (3), a motor shaft (8) is installed between the inside of the rolling bearing 1 (2) and the inside of the rolling bearing 2 (5), a shaft retaining ring (7) is clamped below the rolling bearing 2 (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), and an adsorption assembly (11) is arranged at the bottom of the bearing sleeve (3).

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

3. The rolling bearing elastic interference fit vibration reduction motor structure according to claim 1, characterized in that: The top periphery of the upper chamber (1d) of the lower cavity is recessed upwards, and the middle portion of the top of the bearing sleeve (3) is convex upwards, thereby facilitating stable assembly of the spring 1 (4).

4. The rolling bearing elastic interference fit vibration reduction motor structure according to claim 1, characterized in that: The inner side wall of the bottom of the bearing sleeve (3) is evenly provided with sliding grooves (3a), and the outer periphery of the second rolling bearing (5) is evenly fixedly connected with sliding columns (5a), and the sliding grooves (3a) are adapted to the sliding columns (5a).

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

6. The rolling bearing elastic interference fit vibration reduction motor structure according to claim 1, characterized in that: The adsorption component (11) comprises: Suction holes (111), the bottom of the bearing sleeve (3) is evenly provided with suction holes (111), 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), wherein the cylinder (112) is provided below the suction hole (111) inside the bearing sleeve (3), and the cylinder (112) is connected to the suction hole (111); A piston (113), wherein the interior of the cylinder (112) is slidably connected with the piston (113); A mounting groove (114), wherein a mounting groove (114) is provided below the bottom cylinder (112) of the bearing sleeve (3); A trigger plate (115), the interior of the mounting groove (114) is limitedly slidably connected with the trigger plate (115), and the top end of the inner side of the trigger plate (115) is fixedly mounted on the piston (113); A limiting column (116), wherein the limiting column (116) is fixedly mounted in the middle of the top end of the trigger plate (115); Spring 2 (117), the top of the limiting column (116) extends upward to the interior of the bearing sleeve (3) and is slidably connected to the bearing sleeve (3), and spring 2 (117) is fixedly connected between the top of the limiting column (116) and the inner wall of the bearing sleeve (3).

7. The rolling bearing elastic interference fit vibration reduction motor structure according to claim 6, characterized in that: The outer periphery of the second rolling bearing (5) is evenly provided with circular grooves (5b), the number of the circular grooves (5b) being the same as the number of the suction holes (111) inside the bearing sleeve (3), and after the second rolling bearing (5) is assembled with the bearing sleeve (3) through the cooperation of the sliding column (5a) and the sliding groove (3a), the circular grooves (5b) and the suction holes (111) are aligned with the ports on the inner wall of the bearing sleeve (3).

8. The rolling bearing elastic interference fit vibration reduction motor structure according to claim 6, characterized in that: The trigger plate (115) extends outward to the outside of the bearing sleeve (3), and limiting grooves (1f) are evenly provided on the outside below the lower chamber (1c) of the lower cavity of the bottom of the bracket (1), and the limiting grooves (1f) are adapted to the outer area of ​​the trigger plate (115) and are the same in number.

Images