Three-lip seal type motor deep groove ball bearing

Abstract

The utility model provides three lip sealed motor deep groove ball bearing relates to motor bearing technical field, including bearing inner race, bearing inner race outside wall on equal distance sliding connection has bearing steel ball, bearing steel ball top outside slides and is connected on bearing outer ring inner side wall, is equipped with the steel ball retainer between bearing inner race and bearing outer ring, the steel ball retainer rotationally connects with bearing steel ball, the both sides of bearing inner race and bearing outer ring between front and back all have the sealing ring, and the front and back surface of bearing inner race is fixedly installed with the limit baffle, the sealing combination block and two combination inserts of this three lip sealed motor deep groove ball bearing constitute three lip type sealing structure jointly, and the sealing combination groove and sealing combination block are tightly connected through the barb, and the double fixing of cooperation combination insert and combination slot make sealing ring firm connection between bearing inner race and bearing outer ring, effectively block the dust, impurity invasion of outside, and prevent internal lubricating grease leakage, to solve the problem of reliable sealing when bearing operation.

Description

Technical Field

[0001] This utility model relates to the field of motor bearing technology, and in particular to a three-lip sealed deep groove ball bearing for motors. Background Technology

[0002] During motor operation, deep groove ball bearings, with their unique design and structural characteristics, have become an ideal choice for motor applications. These bearings have the advantages of low friction coefficient and high limiting speed, which can effectively reduce energy loss during motor operation and improve energy efficiency. Their deep groove raceway structure provides strong radial and axial load-bearing capacity, which can stably support the motor rotor and ensure smooth operation. Most existing deep groove ball bearings for motors use single / double lip seal structures to connect with the inner and outer rings of the bearing. The seal structure is prone to loosening and displacement, leading to the intrusion of external dust and impurities and leakage of internal grease. In addition, during use, the seal ring may experience excessive displacement and rigid collision with other components due to internal temperature rise of the bearing and external vibration impact. Utility Model Content

[0003] This utility model relates to a three-lip sealed deep groove ball bearing for motors, in order to solve the problems mentioned in the background art, which are that existing deep groove ball bearings for motors mostly use single / double lip sealing structures to connect with the inner and outer rings of the bearing, the sealing structure is prone to loosening and displacement, and the internal temperature rise of the bearing and external vibration impact cause excessive displacement of the sealing ring and rigid collision with other components.

[0004] This utility model provides a three-lip sealed deep groove ball bearing for motors, specifically including: an inner bearing ring; bearing steel balls are slidably connected at equal intervals on the outer side wall of the inner bearing ring, the top outer side of the bearing steel balls is slidably connected to the inner side wall of the outer bearing ring, a steel ball cage is provided between the inner and outer bearing rings, bearing steel balls are rotatably connected in the steel ball cage, sealing rings are engaged on both the front and rear sides between the inner and outer bearing rings, and limit baffles are fixedly installed on the front and rear surfaces of the inner bearing ring.

[0005] Furthermore, the inner ring of the bearing has concave connecting platforms on its front and rear outer diameter surfaces, and two annular combination slots are formed at equal intervals on the connecting platform surfaces on both the front and rear sides of the inner ring.

[0006] Furthermore, the inner sidewall of the outer ring of the bearing is symmetrically provided with sealing combination grooves on both the front and rear sides, and the sealing combination grooves are in the shape of barbs.

[0007] Furthermore, the sealing rings are made of rubber and have an embedded metal skeleton. Sealing assembly blocks are fixedly connected to the outer periphery of the opposite sidewalls of the two sealing rings. The sealing assembly blocks are hooked into the sealing assembly groove of the outer ring of the bearing.

[0008] Furthermore, a clearance groove is provided in the inner peripheral side of the opposite sidewalls of the two sealing rings, and the inner peripheral side of the opposite sidewalls of the two sealing rings is engaged with the connecting platform opened on the outer diameter surface of the inner ring of the bearing. Two combined plugs are fixedly installed on the inner peripheral side of the opposite sidewalls of the two sealing rings, and the combined plugs are inserted into the combined slots opened in the connecting platform.

[0009] Furthermore, the limiting baffle is fixedly connected to the front and rear sides of the inner ring of the bearing by fixing bolts, and the limit baffle and the sealing ring have matching play grooves with gaps between them.

[0010] This utility model provides a three-lip sealed deep groove ball bearing for motors, which has the following beneficial effects: 1. The sealing assembly block and two assembly inserts together form a three-lip sealing structure. The sealing assembly block is tightly engaged with the sealing assembly block through the barbed sealing assembly groove. With the double fixation of the assembly inserts and the assembly slot, the sealing ring is firmly connected between the inner and outer rings of the bearing, effectively blocking the intrusion of external dust and impurities and preventing internal grease leakage. At the same time, the sealing ring with a rubber material embedded in a metal skeleton has both elasticity and strength, adapting to complex operating conditions. The setting of the play groove can absorb vibration and reduce friction, and can also cope with the gas expansion caused by the internal temperature rise of the bearing, avoiding damage to the sealing ring, ensuring the sealing effect under dynamic operating conditions, and extending the service life of the bearing.

[0011] 2. The matching design of the limit baffle and the free play groove provides reliable limit protection for the sealing ring. The limit baffle is firmly installed in the inner ring of the bearing by fixing bolts, and matches the free play groove with a gap. This allows the sealing ring to move within a reasonable range to buffer vibration, and can also limit its displacement in time when it exceeds the limit, preventing excessive displacement of the sealing ring or rigid collision with other components due to abnormal external forces. This design further enhances the stability of the overall bearing structure, improves the sealing reliability, and ensures the continuous and stable operation of the bearing under harsh conditions such as high load and strong vibration. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the axonal structure of the present invention; Figure 2 This is a schematic diagram of the overall disassembled structure of the present invention and the split structure of the bearing inner ring; Figure 3 This is a schematic diagram of the overall half-section structure of this utility model; Figure 4 This utility model Figure 3 A magnified structural diagram at point A; Figure 5 This is a schematic diagram of the bearing inner ring, sealing ring, and limiting baffle structure of this utility model; Figure 6 This is a cross-sectional view of the inner and outer rings of the bearing according to this utility model.

[0015] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Bearing inner ring; 101. Connecting platform; 102. Combination slot; 2. Bearing outer ring; 201. Sealing combination groove; 3. Bearing steel ball; 4. Steel ball cage; 5. Sealing ring; 501. Sealing combination block; 502. Combination insert block; 503. Play groove; 6. Limiting baffle; 601. Fixing bolt. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Example 1: As shown in the attached document Figure 1 To be continued Figure 6 As shown: This utility model provides a three-lip sealed deep groove ball bearing for motors, comprising: an inner bearing ring 1, bearing steel balls 3 slidably connected at equal intervals on the outer side wall of the inner bearing ring 1, the top outer side of the bearing steel balls 3 slidably connected to the inner side wall of the outer bearing ring 2, a steel ball cage 4 provided between the inner bearing ring 1 and the outer bearing ring 2, bearing steel balls 3 rotatably connected in the steel ball cage 4, sealing rings 5 ​​snapped into both the front and rear sides between the inner bearing ring 1 and the outer bearing ring 2, limit baffles 6 fixedly installed on the front and rear surfaces of the inner bearing ring 1, and recessed connecting platforms 101 formed on the front and rear outer diameter surfaces of the inner bearing ring 1. Two annular combination slots 102 are provided at equal intervals on the surface of bearing 01. Sealing combination grooves 201 are symmetrically provided on the front and rear sides of the inner sidewall of bearing outer ring 2. The sealing combination grooves 201 are hook-shaped. Specifically, the hook-shaped sealing combination grooves 201 cooperate with the sealing combination blocks 501 on the sealing ring 5 to form a tight snap-fit ​​structure. This not only enhances the connection stability between the sealing ring 5 and the bearing outer ring 2 and prevents the sealing ring 5 from shifting or falling off during bearing operation, but also effectively blocks external dust, impurities and other foreign objects from entering the bearing. At the same time, it avoids leakage of lubricating grease inside the bearing and improves the sealing performance and service life of the bearing.

[0018] The sealing rings 5 ​​are made of rubber and have an embedded metal skeleton. Sealing assembly blocks 501 are fixedly connected to the outer periphery of the opposite sidewalls of the two sealing rings 5. The sealing assembly blocks 501 are hook-shaped and engage in the sealing assembly groove 201 of the outer ring 2 of the bearing. Undulated grooves 503 are formed in the inner periphery of the opposite sidewalls of the two sealing rings 5. The inner periphery of the opposite sidewalls of the two sealing rings 5 ​​engages on the connecting platform 101 on the outer diameter surface of the inner ring 1 of the bearing. Two combination inserts 502 are fixedly installed on the inner periphery of the opposite sidewalls of the two sealing rings 5. The combination inserts 502 are inserted into the combination slots 102 in the connecting platform 101. Specifically, the rubber sealing rings 5 ​​with embedded metal skeletons possess both good elasticity and structural strength, enabling them to adapt to the operation of the bearing. In operation, the dual cooperation of the combined insert 502 and the combined slot 102, and the sealing combination block 501 and the sealing combination groove 201 further strengthens the connection stability between the sealing ring 5 and the inner ring 1 and the outer ring 2 of the bearing, and improves the sealing effect. The setting of the play groove 503 can effectively absorb the vibration and displacement generated during the operation of the bearing, reduce the friction between the sealing ring 5 and other components, and prevent the sealing ring 5 from failing due to excessive wear, thereby continuously ensuring the sealing performance of the bearing and ensuring that the bearing can operate stably under complex working conditions. When the bearing rotates, the internal temperature of the bearing rises, causing the gas to expand and generate thrust to make the sealing ring 5 move outward. The play groove 503 realizes the translation, avoiding the sealing ring 5 from cracking, so as to ensure the sealing performance of the sealing ring 5 under dynamic working conditions.

[0019] The limiting baffle 6 is fixedly connected to the front and rear sides of the inner ring 1 of the bearing by fixing bolts 601. The limiting baffle 6 and the clearance groove 503 of the sealing ring 5 are matched and spaced apart. Specifically, the limiting baffle 6 can limit and protect the sealing ring 5, preventing the sealing ring 5 from excessive displacement to the inside or outside of the bearing due to abnormal external force during bearing operation. The design of matching the clearance groove 503 and spaced apart can ensure that the sealing ring 5 has a certain amount of room to move to absorb vibration, and can also limit the displacement of the sealing ring 5 in time when it exceeds the normal range, avoiding rigid collision between the sealing ring 5 and other bearing components, extending the service life of the sealing ring 5, and further improving the overall sealing reliability and operational stability of the bearing.

[0020] The specific usage and function of this embodiment are as follows: When using this three-lip sealed deep groove ball bearing for motors, first, install the ball cage 4 on the inner ring 1 of the bearing, ensuring that the bearing balls 3 are evenly embedded in the corresponding slots of the ball cage 4. Then, smoothly place the outer ring 2 of the bearing onto the outside of the bearing balls 3, completing the assembly of the main bearing structure. Next, align the sealing assembly block 501 of the sealing ring 5 with the sealing assembly groove 201 of the outer ring 2 of the bearing, and press it appropriately to make them snap into place. Then, precisely insert the assembly insert block 502 of the sealing ring 5 into the assembly slot 102 of the connecting platform 101 of the inner ring 1 of the bearing, achieving a stable connection between the sealing ring 5 and the inner ring 1 and the outer ring 2 of the bearing. Finally, use the fixing bolts 601 to fix the limiting baffle 6 on both sides of the inner ring 1 of the bearing, ensuring that the limiting baffle 6 corresponds to the position of the clearance groove 503 of the sealing ring 5 and maintains a reasonable gap. When installing it into the motor, it is necessary to ensure... The fit precision between the bearing, motor shaft, and bearing housing meets design requirements, preventing uneven bearing stress due to improper installation, which could affect sealing performance and service life. During routine maintenance, the fixing bolts 601 of the limit baffle 6 should be checked regularly for looseness. If looseness is found, they should be tightened promptly. At the same time, observe whether there are any abnormalities such as wear or cracks on the surface of the sealing ring 5. If the sealing ring 5 is damaged, it should be replaced in time to maintain good sealing effect of the bearing. When the bearing is under high speed and heavy load conditions, its unique sealing structure and limit design can effectively resist the intrusion of external contaminants and the loss of internal lubricating grease, continuously ensuring stable operation of the motor. In working environments with frequent temperature changes, the play groove 503 can fully play a buffering role, preventing the sealing ring 5 from being damaged by stress caused by thermal expansion and contraction, ensuring that the bearing always maintains reliable performance under complex and changing working conditions. Example

[0021] Based on the original sealing ring 5, an annular protrusion can be added to the sealing combination groove 201 of the outer ring 2 of the bearing. The annular protrusion and the sealing combination block 501 of the sealing ring 5 form a tortuous labyrinth channel. At the same time, a radially extending annular baffle is added to the inner wall of the limiting baffle 6. The annular baffle and the outer edge of the clearance groove 503 of the sealing ring 5 form a second labyrinth seal. This multi-stage labyrinth seal structure can significantly improve the dustproof and waterproof performance of the bearing, and is especially suitable for working environments with high dust concentration or humidity.

Claims

1. Deep groove ball bearing for three-lip sealed electric machines, characterized by the fact that, The bearing includes an inner ring (1); bearing steel balls (3) are slidably connected at equal distances on the outer side wall of the inner ring (1), the top outer side of the bearing steel balls (3) is slidably connected to the inner side wall of the outer ring (2), a steel ball retainer (4) is provided between the inner ring (1) and the outer ring (2), the bearing steel balls (3) are rotatably connected in the steel ball retainer (4), and sealing rings (5) are snapped on both the front and rear sides between the inner ring (1) and the outer ring (2), and limit baffles (6) are fixedly installed on the front and rear surfaces of the inner ring (1).

2. The triple lip sealed motor deep groove ball bearing of claim 1, wherein, The inner ring (1) of the bearing has a recessed connecting platform (101) on its front and rear outer diameter surfaces, and two annular combination slots (102) are provided at equal intervals on the connecting platform (101) surfaces on the front and rear sides of the inner ring (1).

3. The triple lip sealed motor deep groove ball bearing of claim 1, wherein, The inner sidewall of the outer ring (2) of the bearing is symmetrically provided with sealing combination grooves (201) on both the front and rear sides, and the sealing combination grooves (201) are in the shape of barbs.

4. The triple lip sealed motor deep groove ball bearing of claim 1, wherein, The sealing ring (5) is made of rubber and has an embedded metal skeleton. The outer periphery of the opposite sidewalls of the two sealing rings (5) is fixedly connected with a sealing assembly block (501). The sealing assembly block (501) is hooked into the sealing assembly groove (201) of the outer ring (2) of the bearing.

5. The triple lip sealed motor deep groove ball bearing of claim 1, wherein, The inner peripheral side of the opposite sidewalls of the two sealing rings (5) is provided with a clearance groove (503). The inner peripheral side of the opposite sidewalls of the two sealing rings (5) is engaged on the connecting platform (101) opened on the outer diameter surface of the inner ring (1) of the bearing. Two combination plugs (502) are fixedly installed on the inner peripheral side of the opposite sidewalls of the two sealing rings (5). The combination plugs (502) are inserted into the combination slots (102) opened on the connecting platform (101).

6. The triple lip sealed motor deep groove ball bearing of claim 1, wherein, The limiting baffle (6) is fixedly connected to the front and rear sides of the inner ring (1) of the bearing by fixing bolts (601). The limit baffle (6) and the clearance groove (503) of the sealing ring (5) are matched and have gaps.

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