Vibration motor capable of preventing grease from overflowing

Abstract

The utility model discloses a vibration motor capable of preventing grease from overflowing, which comprises a motor shell, at least one end of the motor shell is covered with a bearing seat, a bearing is embedded in the bearing seat, and a rotating shaft of the vibration motor penetrates through the bearing and extends out of the bearing seat through a through hole in the bearing seat. An eccentric block is detachably connected to the portion, located outside the bearing seat, of the rotating shaft, an outer oil seal is embedded in the through hole, the rotating shaft is sleeved with the outer oil seal in a sealed mode so as to prevent grease in the bearing from overflowing, and the bearing has the advantages of being simple in structure and high in practicability; grease in the bearing can be prevented from overflowing or throwing out to influence the adjustment of the eccentric block and the generation of exciting force; normal operation of the vibration motor can be ensured, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a vibration motor, more specifically, to a vibration motor capable of preventing grease from overflowing, belonging to the field of vibration motors. Background Art

[0002] A vibration motor is an excitation source that combines a power source with a vibration source. It utilizes a set of adjustable eccentric weights installed at either or both ends of the rotor shaft, generating an excitation force using the centrifugal force generated by the high-speed rotation of the shaft and eccentric weights. Vibration motors offer high excitation force utilization, low energy consumption, low noise, and a long lifespan. The excitation force can be adjusted steplessly, making them easy to use. Depending on the application, they can be divided into standard and explosion-proof vibration motors; and depending on the mounting structure, they can be divided into horizontal and vertical vibration motors. Vibration motors are widely used in various types of vibrating machinery, such as vibrating crushers, vibrating screens, and vibrating balers. They are widely used in hydropower construction, thermal power generation, construction, building materials, chemicals, mining, coal mining, metallurgy, light industry, and other industrial sectors. Furthermore, vibration motors in the YZO series are characterized by easy maintenance, high strength, and a proper balance between excitation force and output.

[0003] However, during the use of vibration motors, some mechanical failures may occur. Bearing system failure is a typical and relatively common problem. When a bearing system failure occurs, the main symptoms are noise and heat. In severe cases, grease leakage and blackening may occur, leading to aging problems.

[0004] Specifically, the issue of grease overflow from bearings in vibration motors, affecting the use of eccentric blocks, can be caused by a variety of factors. On the one hand, eccentricity during the bearing manufacturing and installation process may cause the bearing to be subjected to additional pressure and vibration during operation, accelerating grease aging and overflow. On the other hand, problems with the bearing system's fit or electrical corrosion may cause elevated temperatures, degrading the grease's performance and further increasing the heating of the bearing system, creating a vicious cycle.

[0005] When grease overflows and contaminates the eccentric weight or other motor components, it can affect the proper operation of the vibration motor. For example, degraded grease can cause abnormal bearing noise, resulting in rough rotation and, in severe cases, even heating and damage. Furthermore, grease contamination can affect the adjustment of the eccentric weight and the generation of the excitation force, thereby compromising the overall performance of the vibration motor.

[0006] Therefore, when using a vibration motor, it's important to pay attention to the maintenance and care of the bearing system. Grease should be regularly inspected and replaced to ensure that the quality and quantity meet the required requirements. Also, pay attention to the installation and adjustment of the bearings to avoid eccentricity. Vibration motors that experience problems such as grease overflow should be promptly inspected and maintained to ensure proper operation and extend their service life.

[0007] Therefore, it is an inevitable trend to develop a vibration motor with simple structure, strong practicality, and the ability to prevent grease in the bearing from overflowing or being thrown out to affect the adjustment of the eccentric block and the generation of exciting force, thereby ensuring normal operation and extending service life. Utility Model Content

[0008] In order to solve the above-mentioned problems of the prior art, the utility model provides a vibration motor that can prevent grease overflow, which has the technical characteristics of simple structure, strong practicality, and the ability to prevent grease in the bearing from overflowing or being thrown out to affect the adjustment of the eccentric block and the generation of exciting force.

[0009] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0010] The utility model discloses a vibration motor capable of preventing grease from overflowing, comprising a motor housing, at least one end of the motor housing being sealed with a bearing seat, a bearing being embedded in the bearing seat, a rotating shaft of the vibration motor passing through the bearing and extending out of the bearing seat through a through hole on the bearing seat, an eccentric block being detachably connected to the rotating shaft outside the bearing seat, an external oil seal being embedded in the through hole, and a sealing sleeve of the external oil seal being arranged on the rotating shaft to prevent grease in the bearing from overflowing.

[0011] Preferably, a bearing mounting hole is opened on the inner side of the bearing seat, the through hole is connected to the bearing mounting hole and is arranged coaxially, the bearing is embedded in the bearing mounting hole, and the bearing mounting hole is covered with a bearing sleeve that can be mounted on the rotating shaft to prevent the bearing from falling out of the bearing mounting hole.

[0012] Preferably, the size of the bearing is adapted to the size of the bearing mounting hole.

[0013] Preferably, a retaining spring is engaged in the bearing mounting hole outside the bearing sleeve to prevent the bearing sleeve from falling out of the bearing mounting hole.

[0014] Preferably, a circular groove is recessed on the inner wall of the bearing mounting hole, a portion of the retaining spring is embedded in the circular groove for positioning, and the other portion extends out of the circular groove to limit the bearing sleeve.

[0015] Preferably, the bearing is a ball bearing.

[0016] Preferably, an inner oil seal is provided at the penetration hole of the bearing sleeve to prevent the grease in the bearing from overflowing into the motor housing.

[0017] Preferably, both ends of the motor housing are covered with bearing seats.

[0018] Preferably, the motor housing is externally connected to a cover shell, and the eccentric block is hidden inside the cover shell.

[0019] Preferably, the outer oil seal is a rubber ring.

[0020] Beneficial effects: simple structure and strong practicality; can prevent grease in the bearing from overflowing or being thrown out to affect the adjustment of the eccentric block and the generation of exciting force; can ensure the normal operation of the vibration motor and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded view of the vibration motor of the utility model.

[0022] Figure 2 It is a cross-sectional view of the vibration motor of the utility model.

[0023] Figure 3 This is a cross-sectional view of the bearing seat and bearing of the utility model after assembly.

[0024] Figure 4 It is an enlarged view of point A of the present utility model. DETAILED DESCRIPTION

[0025] The following is a combination of the appended examples of the present invention Figure 1-4 , a clear and complete description of the technical solutions in the embodiments of the present utility model is given.

[0026] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] like Figure 1-4 The figure shows a specific embodiment of a vibration motor that can prevent grease from overflowing. The embodiment of the vibration motor that can prevent grease from overflowing comprises a motor housing, at least one end of which is sealed with a bearing seat 1. Figure 1As shown, as a conventional design, a set of adjustable eccentric blocks are installed at each end of the rotor shaft (i.e., the shaft 3 of this application), and the centrifugal force generated by the high-speed rotation of the shaft and the eccentric blocks is used to obtain the exciting force. The following content only introduces the structure of one end of the rotor shaft. The bearing seat 1 is embedded with a bearing 2, and the shaft 3 of the vibration motor passes through the bearing 2 and extends out of the bearing seat 1 through the through hole 5 on the bearing seat 1. The shaft 3 outside the bearing seat 1 is detachably connected with an eccentric block 4, and the through hole 5 is embedded with an external oil seal 6. The sealing sleeve of the external oil seal 6 is provided on the shaft 3 to prevent the grease in the bearing 2 from overflowing;

[0028] In the conventional technology, only an oil seal is provided on the inner side of the bearing 2 to prevent the grease in the bearing from leaking inwards and ensure good lubrication and normal operation of the bearing. Therefore, there is no specific structure that can realize the combined design of the bearing, the rotating shaft and the outer oil seal.

[0029] Principle / Operational Scheme of the Application: When a vibration motor is in use, its bearing 2 is continuously subjected to additional pressure and vibration due to operation. According to the design scheme of the application, even when the grease ages and overflows, the grease can be prevented from overflowing and contaminating the eccentric weight 4. Specifically: The application creatively prevents the grease from overflowing and contaminating the eccentric weight 4 through the combination of the bearing seat 1 and the outer oil seal 6, thereby avoiding affecting the normal operation of the vibration motor. The structure is simple and practical.

[0030] In a preferred embodiment, a bearing mounting hole is defined on the inner side of the bearing seat 1. The through hole 5 is connected to the bearing mounting hole and is coaxially arranged. The bearing 2 is embedded in the bearing mounting hole. The bearing mounting hole is covered with a bearing sleeve 7 that can be mounted on the rotating shaft 3 to prevent the bearing 2 from falling out of the bearing mounting hole. The coaxial arrangement can prevent the rotating shaft 3 from being worn and increase its service life. The bearing sleeve 7 can not only prevent the bearing 2 from falling out of the bearing mounting hole, but also prevent grease from overflowing to a certain extent.

[0031] In a preferred embodiment, the bearing 2 is adapted to the size of the bearing mounting hole, so as to achieve a tight fit and clamping, thereby achieving assembly stability and reducing the probability of problems such as mechanical noise.

[0032] In a preferred embodiment, a retaining spring 8 is engaged in the bearing mounting hole outside the bearing sleeve 7 to prevent the bearing sleeve 7 from falling out of the bearing mounting hole. The structure is simple and practical.

[0033] In a preferred embodiment, a circular groove 9 is recessed on the inner wall of the bearing mounting hole, a portion of the retaining spring 8 is embedded in the circular groove 9 for positioning, and the other portion extends out of the circular groove 9 to limit the bearing sleeve 7. This positioning method of partially embedding the circular groove 9 can not only realize the function of limiting the bearing sleeve 7, but also achieve the stability of the position of the retaining spring 8 to a greater extent.

[0034] Preferably, the bearing 2 is a ball bearing 2, or a spherical bearing, a roller bearing, etc., which is selected according to actual needs, and the application does not make specific limitations.

[0035] Preferably, the bearing sleeve 7 is provided with an inner oil seal 10 at the through hole to prevent the grease in the bearing 2 from overflowing into the motor housing, which is simple in structure and strong in practicability, and the inner and outer oil seals are matched, thereby greatly improving the service life of the vibration motor.

[0036] Preferably, the motor housing is covered with a bearing seat 1 at both ends, which is simple in structure and strong in practicability.

[0037] Preferably, the motor housing is connected with a cover 11, and the eccentric block 4 is hidden in the cover 11.

[0038] Preferably, the outer oil seal 6 is a rubber ring, and the application does not make specific limitations on the rubber material. The following specific rubber ring materials are selected in this embodiment, and their advantages on the oil seal are described.

[0039] Nitrile Rubber (NBR):

[0040] Oil Resistance: Nitrile rubber has excellent oil resistance, making it suitable for environments where it comes into contact with petroleum-based liquids.

[0041] Wear Resistance: In terms of wear resistance, nitrile rubber also performs well.

[0042] Cost-Effectiveness: Nitrile rubber is a relatively low-cost rubber material, making oil seals made of it more competitive in terms of price.

[0043] Hydrogenated Nitrile Rubber (HNBR):

[0044] Corrosion Resistance and Tear Resistance: Hydrogenated nitrile rubber has excellent corrosion resistance and tear resistance.

[0045] Compression Deformation Resistance: It has excellent compression deformation resistance and can maintain stable sealing effect under high pressure environment.

[0046] Weather Resistance: Hydrogenated nitrile rubber also has excellent weather resistance, sunlight resistance and ozone resistance, making it suitable for oil seals used in outdoor or harsh environments.

[0047] Silicone Rubber (SIL):

[0048] Heat and Cold Resistance: Silicone rubber has excellent heat and cold resistance, and can maintain stable sealing effect under extreme temperature conditions.

[0049] Ozone resistance and atmospheric aging resistance: Its ozone resistance and atmospheric aging resistance are also very outstanding, suitable for oil seals that need to be exposed to the external environment for a long time.

[0050] Insulation properties: Silicone rubber also has good insulation properties and is suitable for oil seals that require electrical insulation.

[0051] Fluororubber (such as fluorine rubber, fluorosilicone rubber):

[0052] High temperature resistance: Fluororubber has extremely high high temperature resistance and can maintain a stable sealing effect in high temperature environments.

[0053] Chemical resistance: Fluororubber has excellent resistance to various chemicals, including acids, alkalis, solvents, etc.

[0054] Oil resistance: Fluororubber also has excellent oil resistance and is suitable for oil seals that come into contact with a variety of oils.

[0055] EPDM:

[0056] Weather resistance and ozone resistance: EPDM rubber has excellent weather resistance and ozone resistance, and is suitable for oil seals used in outdoor environments.

[0057] Water resistance: It is also very water-resistant and can maintain a stable sealing effect in humid environments.

[0058] Chemical resistance: It also has certain tolerance to alcohols, ketones and other chemicals.

[0059] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. A vibration motor capable of preventing grease from overflowing, comprising a motor housing, characterized in that: At least one end of the motor housing is sealed with a bearing seat (1), a bearing (2) is embedded in the bearing seat (1), a rotating shaft (3) of the vibration motor passes through the bearing (2) and extends out of the bearing seat (1) through a through hole (5) on the bearing seat (1), an eccentric block (4) is detachably connected to the rotating shaft (3) outside the bearing seat (1), an external oil seal (6) is embedded in the through hole (5), and the external oil seal (6) is provided as a sealing sleeve on the rotating shaft (3) to prevent grease in the bearing (2) from overflowing.

2. The vibration motor capable of preventing grease from overflowing according to claim 1, characterized in that: A bearing mounting hole is provided on the inner side of the bearing seat (1), the through hole (5) is communicated with the bearing mounting hole, the bearing (2) is embedded in the bearing mounting hole, and the bearing mounting hole is covered with a bearing sleeve (7) to prevent the bearing (2) from falling out of the bearing mounting hole.

3. The vibration motor capable of preventing grease from overflowing according to claim 2, characterized in that: The bearing (2) is adapted to the size of the bearing mounting hole.

4. A vibration motor capable of preventing grease from overflowing according to claim 2 or 3, characterized in that: A retaining spring (8) is engaged in the bearing mounting hole outside the bearing sleeve (7) to prevent the bearing sleeve (7) from falling out of the bearing mounting hole.

5. The vibration motor capable of preventing grease from overflowing according to claim 4, characterized in that: A circular groove (9) is recessed on the inner wall of the bearing mounting hole, a portion of the retaining spring (8) is embedded in the circular groove (9) for positioning, and the other portion extends out of the circular groove (9) to limit the bearing sleeve (7).

6. The vibration motor capable of preventing grease from overflowing according to claim 1, characterized in that: The bearing (2) is a ball bearing (2).

7. The vibration motor capable of preventing grease from overflowing according to claim 1, characterized in that: An inner oil seal (10) is provided at the penetration hole of the bearing sleeve (7) to prevent the grease in the bearing (2) from overflowing into the motor housing.

8. The vibration motor capable of preventing grease from overflowing according to claim 1, characterized in that: Both ends of the motor housing are sealed with bearing seats (1).

9. A vibration motor capable of preventing grease from overflowing according to claim 1, 2, 6, 7 or 8, characterized in that: The motor housing is externally connected to a cover shell (11), and the eccentric block (4) is hidden inside the cover shell (11).

10. The vibration motor capable of preventing grease from overflowing according to claim 1, characterized in that: The outer oil seal (6) is a rubber ring.

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