Servo motor capable of reducing noise

Abstract

The utility model discloses a servo motor capable of reducing noise, and belongs to the technical field of motors. The motor mainly comprises a motor shell, a stator is installed in the motor shell, a rotor is installed in the motor shell, a rotating shaft is installed at one end of the rotor, and a bearing assembly is installed in the motor shell; the bearing assembly comprises a fixing ring, an outer ring and an inner ring, the fixing ring is connected with the motor shell, and the outer ring is arranged on the outer periphery of the inner ring in a sleeving mode. According to the servo motor capable of reducing noise, through the arrangement of the bearing assembly, when the friction resistance between the outer ring and the inner ring is increased, the outer ring rotates relative to the fixed ring, the sealing ball is forced to move upwards in the vertical direction, lubricating oil in the containing groove flows out through a gap between the sealing ball and the conical hole, and the ball is lubricated; the requirement for manually adding lubricating oil can be reduced, lubrication is automatically provided through a lubricating system in the bearing, friction and abrasion are reduced, the service life of the bearing is prolonged, and noise is reduced.

Description

Technical Field

[0001] This application relates to the technical field of motors, and specifically to a servo motor capable of reducing noise. Background Art

[0002] A servo motor refers to an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect speed change device. A servo motor can control speed, and the position accuracy is very accurate. It can convert a voltage signal into torque and rotational speed to drive the control object. The rotational speed of the servo motor rotor is controlled by the input signal and can respond quickly. In an automatic control system, it is used as an actuator and has characteristics such as a small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft.

[0003] Chinese Patent Grant Publication No.: CN218335515 discloses a servo motor. In this solution, two motor housings can be spliced together to form a complete protective housing. When maintenance is required, the two motor housings can be easily separated and disassembled, saving maintenance time and improving maintenance efficiency.

[0004] Bearings are used in servo motors to support the rotating shaft. However, when the bearings are used for a long time, the frictional resistance between the bearings will gradually increase. This will not only cause the performance of the motor to decline but may also cause noise problems. Currently, professional staff usually need to perform maintenance regularly, disassemble the bearings, and manually add lubricating oil to reduce friction, which requires a lot of time and effort.

[0005] Therefore, it is necessary to provide a servo motor capable of reducing noise to solve the above problems.

[0006] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model

[0007] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a servo motor capable of reducing noise. Through the provided bearing assembly, when the frictional resistance between the outer ring and the inner ring increases, the outer ring rotates relative to the fixed ring, forcing the sealing ball to move vertically upward, so that the lubricating oil in the accommodating groove flows out through the gap between the sealing ball and the tapered hole to lubricate the ball bearings. This can reduce the need for manual addition of lubricating oil, automatically provide lubrication through the lubrication system inside the bearing, reduce friction and wear, extend the life of the bearing, and reduce the generation of noise.

[0008] The technical solution adopted by the present application to solve the technical problem is: a servo motor with noise reduction, comprising a motor housing, a stator is installed inside the motor housing, a rotor is installed inside the motor housing, a rotating shaft is installed at one end of the rotor, and a bearing assembly is installed inside the motor housing;

[0009] The bearing assembly includes a fixed ring, an outer ring and an inner ring, the fixed ring is connected to the motor housing, the outer ring is sleeved on the outer enclosure of the inner ring, and a plurality of balls are installed between the outer ring and the inner ring, the inner ring is sleeved on the outer enclosure of the rotating shaft, a plurality of abutment blocks are slidably connected to the outer wall of the outer ring, and a plurality of connecting holes are provided on the outer wall of the outer ring, a receiving groove is provided inside the fixed ring, and a tapered hole connected to the receiving groove is provided inside the fixed ring, a sealing ball is provided in the tapered hole, and a plurality of booster parts for increasing the friction between the fixed ring and the outer ring are also installed inside the fixed ring.

[0010] Furthermore, the inner wall of the fixing ring is provided with a clearance groove, and the outer wall of the outer ring is provided with an abutment groove, and the clearance groove and the abutment groove are arranged in a staggered manner.

[0011] Furthermore, a through hole communicating with the accommodating groove is formed on the outer side wall of the fixing ring, and an oil injection channel is formed on the motor housing, and the oil injection channel and the through hole are coaxially arranged.

[0012] Furthermore, a sealing plug is installed on the motor housing, and the sealing plug covers the top opening of the oil injection channel.

[0013] Furthermore, the booster component includes a booster block and a connecting block, a spring is installed between the booster block and the connecting block, and the booster block abuts against the inner side wall of the abutment groove on the outer ring.

[0014] Furthermore, a plurality of mounting grooves are provided inside the fixing ring, and the connecting block and the boosting block are both slidably connected to the mounting grooves.

[0015] Furthermore, the booster also includes a fastening bolt, which is threadedly connected to the fixing ring and abuts against the connecting block.

[0016] Furthermore, the end of the abutment block is arranged in a hemispherical shape.

[0017] The beneficial effect of the present application is as follows: a noise-reducing servo motor provided by the present application, through the setting of the bearing assembly, when the friction resistance between the outer ring and the inner ring increases, the outer ring rotates relative to the fixed ring, forcing the sealing ball to move vertically upward, so that the lubricating oil in the accommodating groove flows out through the gap between the sealing ball and the tapered hole to lubricate the ball, which can reduce the need for manual addition of lubricating oil, and automatically provide lubrication through the lubrication system inside the bearing, thereby reducing friction and wear, extending the life of the bearing, and reducing noise generation.

[0018] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The attached drawings forming a part of this application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application.

[0020] In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure;

[0022] Figure 2 is an exploded view of the structure;

[0023] Figure 3 is an exploded view of the bearing assembly;

[0024] Figure 4 is a schematic diagram of the first sectional structure of the bearing assembly;

[0025] Figure 5 is a schematic diagram of the second sectional structure of the bearing assembly;

[0026] Figure 6 is Figure 5 an enlarged schematic diagram of part A in

[0027] Among them, the reference numerals in the drawings:

[0028] 1, motor housing; 2, bearing assembly; 21, fixing ring; 22, outer ring; 23, inner ring; 24, ball; 25, through hole; 26, pressurizing member; 261, pressurizing block; 262, spring; 263, connecting block; 264, fastening bolt; 27, relief groove; 28, abutting groove; 29, receiving groove; 210, tapered hole; 211, sealing ball; 212, abutting block; 213, mounting groove; 214, communication hole; 3, rotating shaft; 4, sealing plug; 5, oil injection channel; 6, rotor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0031] As Figures 1-6 shown, this application provides a servo motor with noise reduction function, which includes a motor housing 1. A stator is installed inside the motor housing 1, and a rotor 6 is installed inside the motor housing 1. One end of the rotor 6 is installed with a rotating shaft 3, and a bearing assembly 2 is installed inside the motor housing 1;

[0032] The bearing assembly 2 includes a fixing ring 21, an outer ring 22 and an inner ring 23. The fixing ring 21 is connected to the motor housing 1. The fixing ring 21 can be fixedly connected to the motor housing 1 by means of clamping or the like. The outer ring 22 is sleeved outside the inner ring 23, and a plurality of balls 24 are installed between the outer ring 22 and the inner ring 23. The inner ring 23 is sleeved outside the rotating shaft 3, and the inner ring 23 can be fixedly connected to the rotating shaft 3 by means of clamping, so that the rotating shaft 3 and the inner ring 23 rotate synchronously. A plurality of abutting blocks 212 are slidably connected to the outer side wall of the outer ring 22, and a plurality of communication holes 214 are opened on the outer side wall of the outer ring 22. A receiving groove 29 is opened inside the fixing ring 21, and a tapered hole 210 communicating with the receiving groove 29 is opened inside the fixing ring 21. A sealing ball 211 is arranged in the tapered hole 210. A plurality of pressure increasing members 26 for increasing the friction between the fixing ring 21 and the outer ring 22 are also installed inside the fixing ring 21.

[0033] This solution is an engine that controls the operation of mechanical components in a servo system. It can convert the received electrical signal into an angular displacement or angular velocity output on the motor shaft. And sound-absorbing layer and sound-insulating layer are respectively arranged on the inner wall of the motor housing 1 to achieve the purpose of noise reduction, and the sound-absorbing layer and sound-insulating layer do not affect the heat dissipation of the motor housing 1. The specific technical solution has been disclosed in a servo motor disclosed in the Chinese Patent Authorization Publication No.: CN220544789U.

[0034] Among them, the provided bearing assembly 2 is used to support the rotating shaft 3. As the equipment is used for a long time, the frictional resistance between the outer ring 22 and the inner ring 23 gradually increases. When the frictional resistance between the outer ring 22 and the inner ring 23 is greater than the frictional resistance provided by the pressurizing member 26 between the fixed ring 21 and the outer ring 22, the set outer ring 22 will have a relative rotational movement with respect to the fixed ring 21. At this time, under the action of centrifugal force, the abutting block 212 will move out of the outer ring 22, thereby squeezing the tapered hole 210, causing the sealing ball 211 to move upward in the vertical direction, so that the lubricating oil in the accommodating groove 29 flows out through the gap between the sealing ball 211 and the tapered hole 210, and finally flows into the space between the inner ring 23 and the outer ring 22 through the communication hole 214, thereby lubricating the rolling balls 24. When the frictional resistance between the outer ring 22 and the inner ring 23 is greater than the frictional resistance provided by the pressurizing member 26 between the fixed ring 21 and the outer ring 22, the outer ring 22 and the fixed ring 21 are in a relatively static state. This design can reduce the need for manual lubricating oil addition, automatically provide lubrication through the internal lubrication system of the bearing, reduce friction and wear, extend the life of the bearing, and reduce the generation of noise.

[0035] It should be noted that the outer ring 22 and the fixed ring 21 are slidably connected by means of a sliding block and a sliding groove, and end caps are installed on both sides of the outer ring 22, thereby reducing the problem of lubricating oil leaking from the side.

[0036] It is worth noting that the size of the sealing ball 211 is larger than the size of the accommodating groove 29, and the sealing ball 211 will not move in the accommodating groove 29. When the positions of the abutting block 212 and the sealing ball 211 are staggered, the sealing ball 211 will automatically block at the tapered hole 210 to block and seal the tapered hole 210.

[0037] As Figures 3-5 shown, a relief groove 27 is provided on the inner side wall of the fixed ring 21, and an abutting groove 28 is provided on the outer side wall of the outer ring 22. The positions of the relief groove 27 and the abutting groove 28 are staggered.

[0038] In this embodiment, the provided relief groove 27 is used to reserve a certain space for the abutting block 212 to move out under the action of centrifugal force, so that the abutting block 212 does not contact the fixed ring 21. The provided abutting groove 28 is used to accommodate the lubricating oil flowing out of the tapered hole 210, and the lubricating oil can lubricate the rolling balls 24 through the communication hole 214.

[0039] As Figures 2-5 shown, a through hole 25 communicating with the accommodating groove 29 is provided on the outer side wall of the fixed ring 21, an oil injection channel 5 is provided on the motor housing 1, the oil injection channel 5 is coaxially arranged with the through hole 25, a sealing plug 4 is installed on the motor housing 1, the sealing plug 4 covers the top opening of the oil injection channel 5, and the sealing plug 4 can be detachably installed on the motor housing 1 by means of clamping.

[0040] In this embodiment, the staff can regularly supplement lubricating oil into the receiving groove 29 through the oil injection passage 5, and the provided sealing plug 4 is used to block the oil injection passage 5 to achieve a dust-proof effect.

[0041] As Figures 5-6 shown, the pressurizing member 26 includes a pressurizing block 261 and a connecting block 263. A spring 262 is installed between the pressurizing block 261 and the connecting block 263. The two ends of the spring 262 can be fixedly connected to the connecting block 263 and the pressurizing block 261 respectively. The pressurizing block 261 abuts against the inner side wall of the abutting groove 28 on the outer ring 22. A plurality of installation grooves 213 are formed inside the fixing ring 21. Both the connecting block 263 and the pressurizing block 261 are slidably connected to the installation grooves 213. The pressurizing member 26 further includes a fastening bolt 264. The fastening bolt 264 is threadedly connected to the fixing ring 21 and abuts against the connecting block 263.

[0042] In this embodiment, the provided pressurizing block 261 can abut against the outer ring 22 under the elastic force of the spring 262, so as to provide a certain frictional resistance between the fixing ring 21 and the outer ring 22. In addition, by rotating the fastening bolt 264, the screwing-in length of the end of the fastening bolt 264 can be controlled, so as to adjust the compression amount of the spring 262, and further control the pressure of the pressurizing block 261 on the outer ring 22. Increasing the screwing-in length will increase the contact pressure, while decreasing the screwing-in length will decrease the contact pressure. This method can be adjusted according to actual needs to achieve the required frictional resistance. This design can adjust the working state of the bearing assembly 2 by controlling the fastening bolt 264 to adapt to different working conditions and requirements.

[0043] It should be noted that a reserved groove for accommodating the fastening bolt 264 is provided on the outer side wall of the fixing ring 21 to avoid affecting the installation work of the bearing assembly 2.

[0044] As Figure 4 shown, the end of the abutting block 212 is provided in a hemispherical shape.

[0045] In this embodiment, by providing the end of the abutting block 212 in a hemispherical shape, the phenomenon of jamming in the rotation of the outer ring 22 relative to the fixing ring 21 is reduced.

[0046] Working principle:

[0047] As the device is used for a long time, the frictional resistance between the outer ring 22 and the inner ring 23 gradually increases. When the frictional resistance between the outer ring 22 and the inner ring 23 is greater than the frictional resistance provided by the pressurizing member 26 between the fixed ring 21 and the outer ring 22, the set outer ring 22 will have a relative rotational movement with respect to the fixed ring 21. At this time, under the action of centrifugal force, the abutting block 212 will move out of the outer ring 22, thereby squeezing the tapered hole 210, causing the sealing ball 211 to move upward in the vertical direction, so that the lubricating oil in the receiving groove 29 flows out through the gap between the sealing ball 211 and the tapered hole 210, and finally flows into the space between the inner ring 23 and the outer ring 22 through the communication hole 214, thereby lubricating the ball 24. When the frictional resistance between the outer ring 22 and the inner ring 23 is greater than the frictional resistance provided by the pressurizing member 26 between the fixed ring 21 and the outer ring 22, the outer ring 22 and the fixed ring 21 are in a relatively static state, thus achieving the purpose of self-lubrication.

[0048] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A servo motor capable of reducing noise, comprising a motor housing (1), characterized in that: A stator is installed inside the motor housing (1), a rotor (6) is installed inside the motor housing (1), a rotating shaft (3) is installed at one end of the rotor (6), and a bearing assembly (2) is installed inside the motor housing (1); The bearing assembly (2) comprises a fixed ring (21), an outer ring (22) and an inner ring (23); the fixed ring (21) is connected to the motor housing (1); the outer ring (22) is sleeved on the outer periphery of the inner ring (23); a plurality of balls (24) are installed between the outer ring (22) and the inner ring (23); the inner ring (23) is sleeved on the outer periphery of the rotating shaft (3); a plurality of abutment blocks (212) are slidably connected to the outer wall of the outer ring (22); a plurality of communicating holes (214) are provided on the outer wall of the outer ring (22); a receiving groove (29) is provided inside the fixed ring (21); and a plurality of connecting holes (214) are provided inside the fixed ring (21) to be connected to the inner ring (23); A conical hole (210) connected to the receiving groove (29), a sealing ball (211) is arranged in the conical hole (210), a plurality of booster parts (26) for increasing the friction between the fixing ring (21) and the outer ring (22) are installed inside the fixing ring (21), a through hole (25) connected to the receiving groove (29) is opened on the outer wall of the fixing ring (21), an oil injection channel (5) is opened on the motor housing (1), the oil injection channel (5) and the through hole (25) are coaxially arranged, and a sealing plug (4) is installed on the motor housing (1), and the sealing plug (4) covers the top opening of the oil injection channel (5).

2. A servo motor with noise reduction according to claim 1, characterized in that: The inner wall of the fixing ring (21) is provided with a clearance groove (27), and the outer wall of the outer ring (22) is provided with an abutment groove (28), and the clearance groove (27) and the abutment groove (28) are arranged in a staggered manner.

3. The servo motor with noise reduction according to claim 1, characterized in that: The booster (26) comprises a booster block (261) and a connecting block (263), a spring (262) is installed between the booster block (261) and the connecting block (263), and the booster block (261) abuts against the inner side wall of the abutment groove (28) on the outer ring (22).

4. A servo motor with noise reduction according to claim 3, characterized in that: A plurality of mounting grooves (213) are provided inside the fixing ring (21), and the connecting block (263) and the boosting block (261) are both slidably connected to the mounting grooves (213).

5. The servo motor with noise reduction according to claim 1, characterized in that: The pressure booster (26) further comprises a fastening bolt (264), wherein the fastening bolt (264) is threadedly connected to the fixing ring (21), and the fastening bolt (264) is in abutment with the connecting block (263).

6. The servo motor with noise reduction according to claim 1, characterized in that: The end of the abutment block (212) is arranged in a hemispherical shape.

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