An ultra-thin low-friction resistance bearing

Abstract

The utility model belongs to bearing field discloses a kind of ultra-thin low friction resistance bearings, including bearing outer ring and bearing inner ring, and installation cavity is formed between bearing outer ring and bearing inner ring, multiple ball is equipped in installation cavity, bearing outer ring is equipped with oil storage chamber, sponge is equipped in oil storage chamber, multiple oil outlet passageways of installation cavity are opened in oil storage chamber inner wall, bearing outer ring is equipped with several extrusion holes being communicated with oil storage chamber, screw rod is slidably connected in extrusion hole inner wall, several screw rods are commonly threadedly connected with extrusion plate, extrusion plate is equipped with oil passing hole, and extrusion plate is slidably connected with oil storage chamber inner wall.This scheme is driven the structure of elastic extrusion plate by screw rod, on the premise that without outer protruding component or weaken the strength of deep hole outer ring, accurate, controllable lubrication to ultra-thin bearing is realized, and the traditional problem that space interference and structural strength cannot be compatible is solved.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and in particular to an ultra-thin bearing with low frictional resistance. Background Technology

[0002] Bearings are core components that support rotating mechanical bodies, reduce their frictional resistance, ensure rotational accuracy, and improve mechanical efficiency. Ultra-thin bearings, in particular, are high-precision bearings with extremely thin walls, light weight, and space-saving design, specifically used in industrial robots, medical equipment, and other fields requiring extremely high structural compactness and precision.

[0003] A search revealed that CN 223105067 U discloses an ultra-thin grease-lubricated bearing, comprising an outer ring and an inner ring, with a mounting cavity formed between them. Multiple balls are disposed within the mounting cavity. An oil reservoir is located within the outer ring, containing an oil-absorbing sponge. Multiple oil outlet channels communicating with the mounting cavity are formed on the inner wall of the oil reservoir. Multiple pressure plates are arranged on the oil-absorbing sponge. The outer ring also has multiple sets of pressing parts for pressing the pressure plates. This practical bearing allows for convenient lubrication, controllable lubrication volume, and prevention of the formation of excessively thick grease layers.

[0004] However, through exploration, the inventors have discovered that this technical solution still has at least the following drawbacks: This utility model achieves controllable and quantitative lubricant supply through the structure of the bolt in the pressing part cooperating with the pressure plate, which has the positive effect of avoiding excessive grease and reducing pollution and waste. However, its method of rotating the bolt in the pressing part to screw it into the threaded hole and push it forward, thereby pushing the pressure plate to squeeze the oil-absorbing sponge and allowing the grease to flow into the mounting cavity through the oil outlet channel, relies on the bolt having a certain pushing stroke. In practical applications, this structure has two typical arrangements: one is allowing the bolt to protrude from the bearing outer ring surface, and the other is pre-drilling a deep hole on the outer ring to accommodate the bolt's advancement. The former results in a protruding component on the bearing outer ring, which not only increases the overall structural size and makes it prone to interference and collision during installation or operation, but may also damage other components or operators due to the exposed bolt; the latter, although appearing smooth, significantly weakens the structural strength and overall load-bearing capacity of the bearing outer ring due to the deep hole, especially critical in thin-walled bearing applications, and may also introduce stress concentration points, affecting bearing fatigue life and reliability. Utility Model Content

[0005] The present invention aims to provide an ultra-thin, low-friction resistance bearing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An ultra-thin, low-friction bearing includes an outer ring and an inner ring, with a mounting cavity formed between them. Multiple balls are disposed within the mounting cavity. The outer ring has an oil reservoir containing a sponge. Multiple oil outlet channels communicating with the mounting cavity are formed on the inner wall of the oil reservoir. The outer ring has several extrusion holes communicating with the oil reservoir. Screws are slidably connected to the inner wall of each extrusion hole. Several screws are threadedly connected to an extrusion plate, which has oil passage holes. The extrusion plate is slidably connected to the inner wall of the oil reservoir.

[0007] Preferably, the outer ring of the bearing has an oil inlet channel communicating with the oil reservoir, and a plug is slidably connected to the inner wall of the oil inlet channel. The plug is connected to a limit ring, and the diameter of the limit ring is larger than the inner diameter of the oil inlet channel.

[0008] Preferably, the outer ring of the bearing has an anti-detachment groove that communicates with the extrusion hole, and the screw is connected to an anti-detachment ring, which is slidably connected to the side wall of the anti-detachment groove.

[0009] Preferably, the anti-detachment ring is connected to a first sealing ring.

[0010] Preferably, the extrusion plate is connected to a plug, the size of which matches the diameter of the oil outlet channel.

[0011] Preferably, the plug has a sealing groove, and a second sealing ring is connected to the inner wall of the sealing groove.

[0012] Preferably, the outer ring of the bearing is threaded with a cover plate.

[0013] Preferably, the limiting ring is connected to a pull ring.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows: (1) By setting a single extrusion plate driven by multiple screws through a common thread, and utilizing the elasticity of the extrusion plate itself, the extrusion plate can undergo local elastic deformation when any screw is rotated, thereby extruding the sponge below that area separately, thus achieving precise and localized lubricating grease supply with high operational flexibility. The screw propulsion in this design relies entirely on the threaded transmission between it and the extrusion plate. The translational movement of the extrusion plate in the oil reservoir does not require additional deep holes to accommodate the movement of the screw head on the outer ring of the bearing, avoiding the two traditional design dilemmas of "bolt protruding from the surface of the outer ring of the bearing" or "opening deep holes that weaken the strength of the outer ring", and solving the defects of spatial interference, safety hazards and weakened structural strength caused by them.

[0015] (2) By setting up an oil inlet channel with a plug and a limiting ring, a dedicated and convenient way is provided to replenish lubricating grease into the oil reservoir. The limiting ring can effectively prevent the plug from sliding completely into the oil inlet channel and being difficult to remove, making the refueling and maintenance operations simpler and more reliable.

[0016] (3) By setting an anti-detachment groove at the end of the extrusion hole and cooperating with the anti-detachment ring on the screw, it can effectively prevent the screw from completely falling out of the extrusion hole during rotation or retraction, thus avoiding component failure and maintenance difficulties caused by screw loss, and improving the overall reliability and service life of the product.

[0017] (4) Setting a first sealing ring on the anti-slip ring can significantly enhance the sealing performance between the screw and the extrusion hole and the anti-slip groove, effectively prevent the lubricating grease in the oil reservoir from leaking from the extrusion hole, keep the bearing clean and reduce grease waste.

[0018] (5) A plug matching the diameter of the oil outlet channel is connected to the extrusion plate. When the extrusion plate is not being extruded and is in the lower position, the plug is inserted into the oil outlet channel, which can effectively seal the channel and prevent the grease in the oil storage chamber from passively seeping out during non-working periods, reducing grease waste and pollution to the surrounding environment. When lubrication is required and the extrusion plate is driven upward by the screw, the plug moves upward and separates from the oil outlet channel, thereby opening the channel and ensuring that the extruded grease can flow smoothly into the mounting cavity to lubricate the balls.

[0019] (6) A sealing groove is opened on the plug and a second sealing ring is set. The tight contact between the second sealing ring and the inner wall of the oil inlet channel greatly enhances the sealing effect of the plug, reliably prevents the lubricating grease from leaking from the oil inlet channel, and ensures the sealing of the oil reservoir. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 Provided by this utility model Figure 1 Section 1-1; Figure 3 Provided by this utility model Figure 1 Section 2-2; Figure 4 Provided by this utility model Figure 2 Enlarged view of point A in the middle; Reference numerals: 1. Bearing outer ring; 2. Bearing inner ring; 3. Cover plate; 4. Screw; 5. Ball bearing; 6. Oil reservoir; 7. Sponge; 8. Extrusion plate; 9. Oil outlet channel; 10. Anti-detachment ring; 11. Anti-detachment groove; 12. First sealing ring; 13. Oil inlet channel; 14. Limiting ring; 15. Sealing groove; 16. Second sealing ring; 17. Pull ring; 18. Plug; 19. Oil passage hole; 20. Mounting cavity; 21. Extrusion hole; 22. Plug; Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figures 1 to 4 The ultra-thin, low-friction bearing shown includes an outer ring 1 and an inner ring 2, as shown. Figure 2 As shown, the outer ring 1 and inner ring 2 of the bearing directly form a mounting cavity 20, and multiple balls 5 are provided inside the mounting cavity 20. Figure 4 As shown, the bearing outer ring 1 is provided with an oil reservoir 6, and a sponge 7 is provided inside the oil reservoir 6. Multiple oil outlet channels 9, connecting to the mounting cavity 20, are opened on the inner wall of the bottom of the oil reservoir 6. The bearing outer ring 1 has several extrusion holes 21 connected to the oil reservoir 6. Screws 4 are slidably connected to the inner wall of the extrusion holes 21. Several screws 4 are threadedly connected to an extrusion plate 8 with a certain elastic deformation. The extrusion plate 8 has several oil passage holes 19 and is slidably connected to the inner wall of the oil reservoir 6. By rotating the screws 4, the extrusion plate 8 is driven to move, and the elastic deformation of the extrusion plate 8 is used to extrude the sponge 7, allowing the grease to flow out evenly through the oil outlet channels 9, achieving precise lubrication. This avoids the problem of the bolt protruding from the bearing outer ring surface or the opening of deep holes that weaken the outer ring strength, thus solving the defects of spatial interference, safety hazards, and weakened structural strength.

[0021] like Figure 4 As shown, an oil inlet channel 13 connected to the oil reservoir 6 is provided on the right side of the outer ring 1 of the bearing. A plug 22 is slidably connected to the inner wall of the oil inlet channel 13. A limit ring 14 is connected to the right side of the plug 22. The diameter of the limit ring 14 is larger than the inner diameter of the oil inlet channel 13, which facilitates oiling and prevents the plug 22 from falling off.

[0022] like Figure 4 As shown, the outer ring 1 of the bearing has an anti-detachment groove 11 that communicates with the extrusion hole 21. The screw 4 is connected to an anti-detachment ring 10. The anti-detachment ring 10 is slidably connected to the side wall of the anti-detachment groove 11. Its function is to limit the stroke of the screw 4 and prevent it from completely detaching.

[0023] like Figure 4 As shown, the anti-detachment ring 10 is connected to the first sealing ring 12, which serves to seal and prevent leakage.

[0024] like Figure 4As shown, a plug 18 is connected to the bottom of the extrusion plate 8. The size of the plug 18 matches the diameter of the oil outlet channel 9. When not in operation, the oil outlet channel 9 is sealed to prevent grease leakage.

[0025] like Figure 4 As shown, the plug 22 has a sealing groove 15, and a second sealing ring 16 is connected to the inner wall of the sealing groove 15 to enhance the sealing performance of the oil inlet channel 13.

[0026] like Figure 4 As shown, a cover plate 3 is threadedly connected to the right side of the outer ring 1 of the bearing for easy disassembly and maintenance.

[0027] like Figure 4 As shown, a pull ring 17 is connected to the right side of the limiting ring 14, which facilitates the removal of the plug 22 for refueling.

[0028] The specific implementation process is as follows: First, pull the plug 22 out of the oil inlet channel 13 using the pull ring 17, inject an appropriate amount of lubricating grease into the oil reservoir 6, and allow it to be fully absorbed by the sponge 7. After completion, reinsert the plug 22 into the oil inlet channel 13, and use the second sealing ring 16 to ensure a seal. When lubrication is required, rotate any screw 4. The screw 4, through its threaded engagement with the extrusion plate 8, pushes the extrusion plate 8 to squeeze the sponge 7. Grease seeps out from the oil passage hole 19 and flows into the mounting cavity 20 through the oil outlet channel 9 to lubricate the ball bearings 5. At this time, the plug 18 moves upward with the extrusion plate 8, disengaging from the oil outlet channel 9 to keep the channel unobstructed. During the screw 4's advancement, the anti-detachment ring 10 prevents the screw 4 from falling off, and the first sealing ring 12 effectively prevents grease leakage from the extrusion hole 21. After lubrication, rotate the screw 4 in the opposite direction, causing the extrusion plate 8 to move downward and reset, and the plug 18 to re-seal the oil outlet channel 9. For routine maintenance, the cover plate 3 can be unscrewed to clean or lubricate the interior.

[0029] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An ultra-thin, low-friction bearing, characterized in that: The bearing includes an outer ring (1) and an inner ring (2), with an installation cavity (20) formed between the outer ring (1) and the inner ring (2). The installation cavity (20) contains a plurality of balls (5). The outer ring (1) has an oil reservoir (6), which contains a sponge (7). The inner wall of the oil reservoir (6) has a plurality of oil outlet channels (9) that communicate with the installation cavity (20). The outer ring (1) has a plurality of extrusion holes (21) that communicate with the oil reservoir (6). The inner wall of the extrusion holes (21) is slidably connected to a screw (4). The plurality of screws (4) are threadedly connected to an extrusion plate (8). The extrusion plate (8) has an oil passage hole (19) and is slidably connected to the inner wall of the oil reservoir (6).

2. The ultra-thin low-friction bearing as described in claim 1, characterized in that: The outer ring (1) of the bearing has an oil inlet channel (13) that communicates with the oil storage chamber (6). A plug (22) is slidably connected to the inner wall of the oil inlet channel (13). The plug (22) is connected to a limiting ring (14). The diameter of the limiting ring (14) is larger than the inner diameter of the oil inlet channel (13).

3. The ultra-thin low-friction bearing as described in claim 1, characterized in that: The outer ring (1) of the bearing is provided with an anti-detachment groove (11) that communicates with the extrusion hole (21). The screw (4) is connected with an anti-detachment ring (10), and the anti-detachment ring (10) is slidably connected to the side wall of the anti-detachment groove (11).

4. The ultra-thin low-friction bearing as described in claim 3, characterized in that: The anti-detachment ring (10) is connected to the first sealing ring (12).

5. The ultra-thin low-friction bearing as described in claim 1, characterized in that: The extrusion plate (8) is connected to a plug (18), the size of which matches the diameter of the oil outlet channel (9).

6. The ultra-thin low-friction bearing as described in claim 2, characterized in that: The plug (22) has a sealing groove (15), and a second sealing ring (16) is connected to the inner wall of the sealing groove (15).

7. The ultra-thin low-friction bearing as described in claim 1, characterized in that: The outer ring (1) of the bearing is threadedly connected to a cover plate (3).

8. The ultra-thin low-friction bearing as described in claim 2, characterized in that: The limiting ring (14) is connected to a pull ring (17).

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