Maintenance-free high-load bearing for air suspension

Abstract

The invention relates to the technical field of bearings, in particular to a maintenance-free high-bearing-capacity bearing for air suspension, which comprises an inner ring and an outer ring, and further comprises a lubrication detection adding mechanism, the lubrication detection adding mechanism comprises four detection grooves formed in the circumference array in the outer ring, and the four detection grooves are filled with expansion liquid. When friction between the balls and the inner ring and the outer ring is increased to cause temperature rise, expansion of the expansion liquid pushes the extrusion plate to rise, then the push rod, the arc-shaped plate and the plugging block are driven to synchronously move upwards, the plugging block is separated from the oil outlet through hole, lubricating oil drips on the balls through the oil outlet through hole, automatic supplementing of the lubricating oil is achieved, and the service life of the lubricating oil is prolonged. When the bearing inner ring rotates, the heavy rolling ball can be automatically located at the lowest position of the connecting cavity to push the connecting block and the arc-shaped cleaning plate to slide so as to clean the oil outlet hole, and when the oil outlet hole is located in the lower half portion, lubricating oil can intermittently drop onto the rolling ball through the oil outlet hole.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically to maintenance-free, high-load bearings for air suspension. Background Technology

[0002] High-load-bearing capacity bearings generally refer to bearings capable of withstanding large loads, typically used in heavy machinery and engineering equipment. Combining air suspension with high-load-bearing capacity bearings can improve vehicle stability and comfort under heavy loads, reduce wear on the suspension system and body, and allow the air suspension system to adjust suspension height according to real-time load, thereby optimizing the vehicle's center of gravity and stability. Under high load conditions, high-load-bearing capacity bearings ensure reliability under various operating conditions, thus allowing them to work in conjunction with the air suspension system to adapt to changing load conditions.

[0003] Existing high-load bearings require the use of lubricating oil. The lubricating oil forms an oil film between the rolling elements and the inner and outer rings of the bearing, which can effectively reduce the coefficient of friction. However, existing high-load bearings require manual checks to determine if lubricating oil needs to be added. They cannot automatically check for lubricating oil levels and add lubricating oil while the vehicle is in use. Manual checks and additions of lubricating oil need to be performed periodically, increasing the frequency and workload of maintenance. Furthermore, dust can enter the bearings during vehicle operation. When dust enters the lubricating oil, it contaminates the oil, making it dirty or even deteriorating. Contaminated lubricating oil not only loses its original lubricating ability but may also cause uneven or broken oil films, failing to effectively protect the bearings. Moreover, it cannot self-clean lubricating oil mixed with dust. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a maintenance-free, high-load-bearing bearing for air suspension, which effectively solves the problems of existing technologies requiring manual inspection and lubrication, and the inability to self-clean lubricating oil mixed with dust inside the bearing.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a maintenance-free, high-load-bearing bearing for air suspension, comprising an inner ring, an outer ring, and further comprising:

[0007] The lubrication detection and addition mechanism includes four detection slots arranged in a circumferential array inside the outer ring. Each of the four detection slots is filled with expansion fluid. An extrusion plate is slidably connected to the inner wall of each of the four detection slots. A connecting spring is fixedly connected between the extrusion plate and the detection slot. A storage cavity for storing lubricating oil is opened inside the outer ring. Multiple oil outlet holes are opened between the storage cavity and the inner circumferential wall of the outer ring. An oil outlet component is provided on the top of the extrusion plate and the oil outlet holes.

[0008] The cleaning mechanism includes a detachable protective ring rotatably mounted on both sides of the inner ring and the inner peripheral wall of the outer ring. The protective ring has a storage groove inside, and the inner wall of the storage groove has two cleaning ports arranged vertically. The cleaning ports are equipped with cleaning blocks for cleaning lubricating oil.

[0009] Preferably, the inner peripheral wall of the outer ring is provided with a rotating groove, and a connecting ring is rotatably provided between the rotating groove and the inner ring. A plurality of circumferentially arranged balls are rolled in the connecting ring, and the inner peripheral wall of the rotating groove and the outer wall of the inner ring are in contact with the plurality of balls.

[0010] Preferably, the oil outlet assembly includes a sliding through hole between the detection tank and the storage cavity. A push rod is airtightly slidably connected to the inner wall of the sliding through hole. The bottom end of the push rod is fixedly connected to the extrusion plate. An arc-shaped plate is fixedly connected to the top end of the push rod, and a plurality of sealing blocks are fixedly connected to the bottom end of the arc-shaped plate and airtightly slidably connected to the inner wall of the oil outlet through hole.

[0011] Preferably, the lubrication detection and addition mechanism further includes a connecting cavity in the inner ring, the inner peripheral wall of the connecting cavity having an oil outlet hole communicating with the outer wall of the inner ring, and the oil outlet hole being located at the lowest point of the connecting cavity, and a rolling ball being placed on the inner wall of the connecting cavity, and the rolling ball blocking the oil outlet hole when stationary.

[0012] Preferably, a connecting block is slidably connected to the inner wall of the connecting cavity, and arc-shaped cleaning plates are fixedly connected to the outer walls on both sides of the connecting block. A push plate is fixedly connected to the other end of each of the two arc-shaped cleaning plates, and a cleaning cotton is fixedly connected to the bottom end of the push plate.

[0013] Preferably, the cleaning mechanism further includes an electromagnetic plate fixedly connected to the inner wall of the storage tank, a support plate fixedly connected to the inner wall of the storage tank between the two cleaning ports, a sliding groove provided at both the upper and lower ends of the support plate, a sliding block slidably connected to the inner wall of the sliding groove, a movable plate fixedly connected to the top of the sliding block, a connecting rod fixedly connected between the movable plate and the cleaning block, a plastic spring fixedly connected to the electromagnetic plate on the other outer wall of the movable plate, the movable plate being made of a modified material with added magnetic powder, and the electromagnetic plate and the movable plate being magnetically repelled.

[0014] Preferably, one end of the cleaning block is airtightly hinged to the cleaning port, and the end of the cleaning block not hinged to the cleaning port has a pointed structure.

[0015] Preferably, a push-button switch that contacts or separates from the extrusion plate is fixedly connected to the inner top wall of the detection groove, and the push-button switch is electrically connected to the electromagnetic plate to form a cleaning circuit.

[0016] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0017] 1. When the friction between the balls and the inner and outer rings increases, causing the temperature to rise, the expansion of the expansion fluid will push the extrusion plate upward, which in turn will drive the push rod, the arc plate, and the sealing block to move upward simultaneously. This will cause the sealing block to disengage from the oil outlet hole, allowing lubricating oil to drip onto the balls through the oil outlet hole, thus achieving automatic lubrication replenishment. When the inner ring of the bearing rotates, the heavier rolling balls will automatically be located at the lowest point of the connecting cavity, pushing the connecting block and the arc cleaning plate to slide, thereby cleaning the oil outlet hole. When the oil outlet hole is in the lower half, lubricating oil will drip intermittently onto the balls through the oil outlet hole, achieving a small amount of lubrication for the balls, thus automatically replenishing the balls with a small amount of lubricating oil.

[0018] 2. While replenishing lubricating oil, the pressing plate will trigger the pressing switch, which will then energize the electromagnetic plate and cause the moving plate and cleaning block to extend towards the connecting ring to clean the lubricating oil and dust mixture on the connecting ring. During the cleaning process, the cleaning block will slide on the inner and outer peripheral walls of the connecting ring, cleaning the dust and contaminated lubricating oil into the storage tank, ensuring the cleanliness and effectiveness of the lubricating oil. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention. Figure 1 ;

[0022] Figure 3 For the present invention Figure 2 Enlarged 3D structural diagram of part A;

[0023] Figure 4 This is a cross-sectional three-dimensional structural diagram of the present invention. Figure 2 ;

[0024] Figure 5 This is a cross-sectional three-dimensional structural diagram of the present invention. Figure 3 ;

[0025] Figure 6 This is a partial three-dimensional structural schematic diagram of the present invention.

[0026] Reference numerals: 1. Inner ring; 2. Outer ring; 3. Lubrication detection and addition mechanism; 31. Detection groove; 32. Extrusion plate; 33. Connecting spring; 34. Storage cavity; 35. Oil outlet hole; 36. Oil outlet assembly; 361. Sliding through hole; 362. Push rod; 363. Arc plate; 364. Sealing block; 37. Connecting cavity; 38. Oil outlet hole; 39. Rolling ball; 310. Connecting block; 311. Arc cleaning plate; 312. Push plate; 4. Cleaning mechanism; 41. Protective ring; 42. Storage groove; 43. Cleaning port; 44. Cleaning block; 45. Electromagnetic plate; 46. Support plate; 47. Slide groove; 48. Sliding block; 49. Moving plate; 410. Connecting rod; 411. Plastic spring; 412. Press switch; 5. Rotating groove; 6. Connecting ring; 7. Ball. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention 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 the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The present invention will be further described below with reference to embodiments.

[0029] Example: Refer to Figures 1 to 6 Maintenance-free, high-load bearings for air suspension, including inner ring 1 and outer ring 2:

[0030] The lubrication detection and addition mechanism 3 includes four detection slots 31 arranged in a circumferential array inside the outer ring 2. Each of the four detection slots 31 is filled with expansion fluid. The inner walls of the four detection slots 31 are airtightly slidably connected to a squeezing plate 32. A connecting spring 33 is fixedly connected between the squeezing plate 32 and the detection slots 31. A storage cavity 34 for storing lubricating oil is opened inside the outer ring 2. Multiple oil outlet holes 35 are opened between the storage cavity 34 and the inner circumferential wall of the outer ring 2. An oil outlet assembly 36 is provided on the top of the squeezing plate 32 and the oil outlet holes 35.

[0031] The oil outlet assembly 36 includes a sliding through hole 361 opened between the detection groove 31 and the storage cavity 34. A push rod 362 is airtightly slidably connected to the inner wall of the sliding through hole 361. The bottom end of the push rod 362 is fixedly connected to the extrusion plate 32, and the top end of the push rod 362 is fixedly connected to an arc plate 363. The bottom end of the arc plate 363 is fixedly connected to a plurality of sealing blocks 364 that are airtightly slidably connected to the inner wall of the oil outlet through hole 35. The friction between the ball 7 and the inner ring 1 and the outer ring 2 will increase, which will increase the temperature of the inner ring 1, the outer ring 2 and the ball 7. The expansion fluid will expand due to the heat, thereby pushing the extrusion plate 32 and the push rod 362 to move upward synchronously. The push rod 362 pushes the arc plate 363 to move upward, which in turn drives the sealing blocks 364 to move upward, so that the oil outlet through hole 35 leaks out, and the lubricating oil leaks out through the oil outlet through hole 35 and drips onto the ball 7.

[0032] The lubrication detection and addition mechanism 3 also includes a connecting cavity 37 opened in the inner ring 1. The inner peripheral wall of the connecting cavity 37 is provided with an oil outlet hole 38 that communicates with the outer wall of the inner ring 1, and the oil outlet hole 38 is located at the lowest point of the connecting cavity 37. A rolling ball 39 is placed on the inner wall of the connecting cavity 37, and the rolling ball 39 blocks the oil outlet hole 38 when it is stationary. When the bearing is in use, the inner ring 1 will rotate. When the inner ring 1 rotates, the rolling ball 39 will move in the connecting cavity 37. Since the rolling ball 39 is relatively heavy, it will automatically be located at the lowest point of the connecting cavity 37, which will push the connecting block 310 and the arc-shaped cleaning plate 311 to slide in the connecting cavity 37, thereby cleaning the oil outlet hole 38. When the oil outlet hole 38 is in the lower half and is not blocked by the arc-shaped cleaning plate 311, lubricating oil will leak through the oil outlet hole 38 onto the ball 7, so as to intermittently replenish the lubricating oil to the ball 7.

[0033] A connecting block 310 is slidably connected to the inner wall of the connecting cavity 37. Arc-shaped cleaning plates 311 are fixedly connected to both outer walls of the connecting block 310. Push plates 312 are fixedly connected to the other ends of the two arc-shaped cleaning plates 311, and cleaning cotton is fixedly connected to the bottom end of the push plates 312.

[0034] It also includes a cleaning mechanism 4. The cleaning mechanism 4 includes a detachable protective ring 41 that is rotatably installed on both sides of the inner ring 1 and the inner peripheral wall of the outer ring 2. The protective ring 41 has a storage groove 42 inside. The inner wall of the storage groove 42 has two cleaning ports 43 arranged vertically. The cleaning ports 43 are equipped with cleaning blocks 44 for cleaning lubricating oil.

[0035] The cleaning mechanism 4 also includes an electromagnetic plate 45 fixedly connected to the inner wall of the storage tank 42. A support plate 46 is fixedly connected to the inner wall of the storage tank 42 between the two cleaning ports 43. The upper and lower ends of the support plate 46 are provided with sliding grooves 47. A sliding block 48 is slidably connected to the inner wall of the sliding groove 47. A moving plate 49 is fixedly connected to the top of the sliding block 48. A connecting rod 410 is fixedly connected between the moving plate 49 and the cleaning block 44. A plastic spring 411 fixedly connected to the electromagnetic plate 45 is fixedly connected to the outer wall of the other side of the moving plate 49. The material of the moving plate 49 is modified to include magnetic powder, and the electromagnetic plate 45 and the moving plate 49 are magnetically repelled.

[0036] One end of the cleaning block 44 is airtightly hinged to the cleaning port 43, and the end of the cleaning block 44 that is not hinged to the cleaning port 43 is a pointed structure.

[0037] A push switch 412 is fixedly connected to the inner top wall of the detection tank 31, which is in contact with or separate from the extrusion plate 32. The push switch 412 is electrically connected to the electromagnetic plate 45 and forms a cleaning circuit. When the extrusion plate 32 moves upward, the push switch 412 is triggered, which in turn energizes the electromagnetic plate 45, causing the electromagnetic plate 45 to repel the moving plate 49. Then, the tip of the cleaning plate is pushed outward by the connecting rod 410. Then, by the rotation of the bearing, the cleaning plate can move between the inner and outer peripheral walls of the connecting ring 6 (because the extrusion of the ball 7 will squeeze the lubricating oil and dust to both sides of the connecting ring 6, so they can be cleaned by the cleaning plate), thereby cleaning the dust and lubricating oil and letting it enter the storage tank 42.

[0038] The inner circumferential wall of the outer ring 2 is provided with a rotating groove 5. A connecting ring 6 is rotatably arranged between the rotating groove 5 and the inner ring 1. Multiple balls 7 in a circular array are rolled in the connecting ring 6. The inner circumferential wall of the rotating groove 5 and the outer wall of the inner ring 1 are in contact with the multiple balls 7. When the bearing is in use (e.g., when a vehicle is moving), the inner ring 1 of the bearing rotates or is fixed with the connected object, while the outer ring 2 rotates or is fixed with the connected object. The relative movement between the inner ring 1 and the outer ring 2 is achieved by the balls 7 rotating in the connecting ring 6 and contacting the outer wall of the inner ring 1 with the inner wall of the outer ring 2, so that the inner ring 1 and the outer ring 2 can move separately.

[0039] The working principle of this invention is as follows:

[0040] When the bearing is in use, if the lubricant is low, the friction between the balls 7 and the inner ring 1 and outer ring 2 will increase. This will cause the temperature of the inner ring 1, outer ring 2, and balls 7 to rise. The reason is that the pressure and relative motion at the contact points generate frictional heat, which is converted into internal energy, raising the temperature of the contact area. This causes the expansion fluid to expand due to the heat, which in turn pushes the extrusion plate 32 and push rod 362 to move upwards simultaneously. The push rod 362 pushes the arc plate 363 upwards, which in turn moves the sealing block 364 upwards, causing the oil outlet hole 35 to leak out. The lubricating oil then drips onto the balls 7. The rolling of the ball bearing 7 will automatically spread the lubricating oil evenly. The addition of lubricating oil can reduce the direct metal contact between the ball bearing 7 and the inner ring 1 and outer ring 2, thereby reducing friction. The reduction of friction means that the generation of frictional heat is reduced, which in turn reduces the temperature rise. The lubricating oil has a certain thermal conductivity and can absorb and transfer the heat on the surface of the ball bearing 7 and the inner ring 1 and outer ring 2. This heat is carried away and transferred to other areas, such as the bearing housing or the environment, thereby achieving a cooling effect. When the temperature drops, the temperature of the expansion fluid will drop, allowing it to recover, and then the sealing block 364 will re-seal the oil inlet and outlet through hole 35.

[0041] While the bearing is in use, the inner ring 1 will rotate. As the inner ring 1 rotates, the rolling ball 39 will move in the connecting cavity 37. Since the rolling ball 39 is relatively heavy, it will automatically be at the lowest point of the connecting cavity 37. This will push the connecting block 310 and the arc-shaped cleaning plate 311 to slide in the connecting cavity 37, thereby cleaning the oil outlet 38. When the oil outlet 38 is in the lower half and is not blocked by the arc-shaped cleaning plate 311, lubricating oil will leak through the oil outlet 38 onto the ball 7, so as to intermittently replenish the lubricating oil of the ball 7 (the replenishment amount is small).

[0042] As the pressing plate 32 moves upward, it triggers the pressing switch 412, which in turn energizes the electromagnetic plate 45, causing the electromagnetic plate 45 to repel the moving plate 49. This, in turn, pushes the tip of the cleaning plate outward through the connecting rod 410. Then, through the rotation of the bearing, the cleaning block 44 can move between the inner and outer peripheral walls of the connecting ring 6 (because the compression of the ball 7 will squeeze the lubricating oil and dust to both sides of the connecting ring 6, so the cleaning block 44 can clean them), thereby cleaning the dust and lubricating oil and allowing them to enter the storage tank 42.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A maintenance-free, high-load-bearing bearing for air suspension, comprising an inner ring (1) and an outer ring (2), characterized in that, Also includes: The lubrication detection and addition mechanism (3) includes four detection slots (31) arranged in a circumferential array inside the outer ring (2). The four detection slots (31) are filled with expansion fluid. The inner walls of the four detection slots (31) are airtightly slidably connected with extrusion plates (32). The extrusion plates (32) and the detection slots (31) are fixedly connected with a connecting spring (33). The outer ring (2) has a storage cavity (34) for storing lubricating oil. The storage cavity (34) and the inner circumferential wall of the outer ring (2) have multiple oil outlet holes (35). The top of the extrusion plate (32) and the oil outlet holes (35) are jointly provided with an oil outlet assembly (36). The cleaning mechanism (4) includes a detachable protective ring (41) that is rotatably mounted on both sides of the inner ring (1) and the inner peripheral wall of the outer ring (2). The protective ring (41) has a storage groove (42) inside. The inner wall of the storage groove (42) has two cleaning ports (43) arranged vertically. The cleaning ports (43) are equipped with cleaning blocks (44) for cleaning lubricating oil.

2. The maintenance-free high-load bearing for air suspension according to claim 1, characterized in that, The inner circumferential wall of the outer ring (2) is provided with a rotating groove (5), and a connecting ring (6) is rotatably provided between the rotating groove (5) and the inner ring (1). Multiple balls (7) in a circular array are rolled in the connecting ring (6), and the inner circumferential wall of the rotating groove (5) and the outer wall of the inner ring (1) are in contact with the multiple balls (7).

3. The maintenance-free high-load bearing for air suspension according to claim 1, characterized in that, The oil outlet assembly (36) includes a sliding through hole (361) opened between the detection groove (31) and the storage cavity (34). The inner wall of the sliding through hole (361) is airtightly slidably connected to a push rod (362). The bottom end of the push rod (362) is fixedly connected to the extrusion plate (32). The top end of the push rod (362) is fixedly connected to an arc plate (363), and the bottom end of the arc plate (363) is fixedly connected to a plurality of sealing blocks (364) that are airtightly slidably connected to the inner wall of the oil outlet through hole (35).

4. The maintenance-free high-load bearing for air suspension according to claim 1, characterized in that, The lubrication detection and addition mechanism (3) further includes a connecting cavity (37) opened in the inner ring (1). The inner peripheral wall of the connecting cavity (37) is provided with an oil outlet hole (38) that communicates with the outer wall of the inner ring (1). The oil outlet hole (38) is located at the lowest point of the connecting cavity (37). A rolling ball (39) is placed on the inner wall of the connecting cavity (37). When the rolling ball (39) is stationary, it blocks the oil outlet hole (38).

5. The maintenance-free high-load bearing for air suspension according to claim 4, characterized in that, The inner wall of the connecting cavity (37) is slidably connected to a connecting block (310), and both outer walls of the connecting block (310) are fixedly connected to arc-shaped cleaning plates (311). The other ends of the two arc-shaped cleaning plates (311) are fixedly connected to push plates (312), and the bottom end of the push plates (312) is fixedly connected to cleaning cotton.

6. The maintenance-free high-load bearing for air suspension according to claim 1, characterized in that, The cleaning mechanism (4) also includes an electromagnetic plate (45) fixedly connected to the inner wall of the storage tank (42). A support plate (46) is fixedly connected to the inner wall of the storage tank (42) between the two cleaning ports (43). The upper and lower ends of the support plate (46) are provided with sliding grooves (47). A sliding block (48) is slidably connected to the inner wall of the sliding groove (47). A moving plate (49) is fixedly connected to the top of the sliding block (48). A connecting rod (410) is fixedly connected between the moving plate (49) and the cleaning block (44). A plastic spring (411) fixedly connected to the electromagnetic plate (45) is fixedly connected to the outer wall of the other side of the moving plate (49). The material of the moving plate (49) is modified and magnetic powder is added. The electromagnetic plate (45) and the moving plate (49) are magnetically repulsive.

7. The maintenance-free high-load bearing for air suspension according to claim 6, characterized in that, One end of the cleaning block (44) is airtightly hinged to the cleaning port (43), and the end of the cleaning block (44) that is not hinged to the cleaning port (43) has a pointed structure.

8. The maintenance-free high-load bearing for air suspension according to claim 1, characterized in that, The inner top wall of the detection groove (31) is fixedly connected to a push switch (412) that is in contact with or separate from the extrusion plate (32). The push switch (412) is electrically connected to the electromagnetic plate (45) and forms a cleaning circuit.

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