Long-acting lubrication front hub bearing

Abstract

The utility model relates to the technical field of hub bearings, in particular to a long-acting lubrication front hub bearing, which comprises an outer ring and an inner ring component, a raceway is arranged between the outer ring and the inner ring component, a steel ball is arranged in the raceway, and a retainer structure which is used for positioning the steel ball and is convenient for long-acting lubrication is arranged in the raceway. Compared with the prior art, the front hub bearing with the long-acting lubrication has the advantages that the size of the spherical surface of the large-diameter side ball cage is increased, so that a gap between two sides of the ball cage after balls are loaded is increased, when the steel balls rotate, enough lubricating grease is provided for long-term and effective lubrication through the gap, the number of the steel balls in each row is maximized in a limited space, and the service life of the bearing is prolonged. And therefore, the bearing capacity of the bearing is maximized, and long-acting lubrication can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub bearings, in particular to a front wheel hub bearing with long-term lubrication. Background Art

[0002] Conventional wheel hub bearings are composed of an outer ring, an inner ring, a cage, a steel ball, a sealing ring assembly, and grease. The outer ring, inner ring, and steel ball are made of GCr15, the cage is made of PA66+GF25, and the sealing ring assembly is made of NBR+SPCC+SUS430. Whether the steel balls in the wheel hub bearing are fully lubricated inside the bearing mainly depends on the design structure of the cage. The design structures of common wheel hub bearing cages are mainly divided into open structures and closed structures.

[0003] The advantages of the wheel hub bearing cage with an open structure design are: it can keep the ball cage open, the ball cage is not easy to scrape off the grease on the surface of the steel ball, the steel ball is sufficiently lubricated, and it is easy to dissipate heat from the bearing. However, the disadvantage of the wheel hub bearing cage with an open structure design is that the cage structure strength is low.

[0004] The advantages of the closed-end wheel bearing cage are: good structural strength, maximum number of steel balls, and increased bearing load capacity. However, the disadvantages of the closed-end wheel bearing cage are: poor heat dissipation of the bearing, and the cage wraps the entire circle of steel balls, which makes it difficult to fully lubricate the steel balls.

[0005] Common closed cage ball cage design: ball cage size = steel ball diameter * coefficient 1.03, the arc of the ball cage on the large diameter side of the cage is the same as that on the small diameter side, and the gap between the ball cage and the steel ball is the same. When the steel ball rotates at high speed in the cage, the grease on the surface of the steel ball enters the gap between the ball cage and the steel ball. Most of the grease is blocked by the mouth of the cage on the cage around the cage, making it difficult to fully lubricate the surface of the steel ball. Therefore, a long-term lubrication front wheel hub bearing is proposed. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies of the prior art, the utility model solves the problems raised in the above background technology by designing a comprehensive bearing clearance measurement and sorting device to replace the manual selection of axial clearance.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a front wheel hub bearing with long-term lubrication, including an outer ring and an inner ring assembly, a raceway is provided between the outer ring and the inner ring assembly, steel balls are provided in the raceway, and a retaining frame structure is provided in the raceway for positioning the steel balls and facilitating long-term lubrication.

[0010] Furthermore, the cage structure includes a ball cage, a hole for assembling a steel ball is provided in the ball cage, the surface of the hole in the ball cage close to the steel ball is the large-diameter side ball cage spherical surface, and the surface of the hole in the ball cage close to the steel ball is the small-diameter side ball cage spherical surface. The small-diameter side ball cage spherical surface is adapted to the steel ball surface, and the size of the large-diameter side ball cage spherical surface is larger than the size of the small-diameter side ball cage spherical surface, so that the steel ball can be effectively lubricated by grease in actual use.

[0011] Furthermore, the large diameter side ball cage spherical surface is located at the lower end surface of the ball cage middle hole, and the small diameter side ball cage spherical surface is located at the upper end surface of the ball cage middle hole. In this solution, the position of the large diameter side ball cage spherical surface can also be set at the upper end surface position of the ball cage middle hole, and the small diameter side ball cage spherical surface is located at the lower end surface position of the ball cage middle hole.

[0012] Furthermore, the size of the spherical surface of the large-diameter side ball cage is greater than the size of the spherical surface of the small-diameter side ball cage.

[0013] Further, the cross-sectional shape of the ball surface of the large-diameter side cage is similar to a "︵" shape, and the two ends of the ball surface of the large-diameter side cage with a cross-sectional shape similar to a "︵" shape extend outward and connect with the ball surface of the small-diameter side cage, and the cross-sectional shape of the ball surface of the small-diameter side cage is similar to a "︶" shape. The cross-sectional shape of the ball surface of the large-diameter side cage is similar to a "︵" shape and the two ends extend outward, so that when it connects with the ball surface of the small-diameter side cage, a gap for accommodating grease can be formed between the steel ball.

[0014] Furthermore, the ball cage is provided with a retaining frame lock buckle for limiting the position of the steel ball.

[0015] Furthermore, the inner ring assembly includes an inner ring A and an inner ring B, the inner ring A is connected to the inner ring B, and a sealing ring assembly for sealing the steel ball is provided between the inner ring A and the outer ring, and between the inner ring B and the outer ring.

[0016] This solution mainly combines the characteristics and advantages of the open test cage and the closed test cage. The size of the cage's large diameter side ball cage spherical surface is designed to be different from the size of the cage's small diameter side ball cage spherical surface. Increasing the size of the large diameter side ball cage spherical surface can increase the gap between the two sides of the cage after the ball is installed. When the steel ball rotates, there is enough grease to pass through the gap for long-term and effective lubrication. In a limited space, the number of steel balls in each row is maximized, so that the bearing capacity is maximized and long-term lubrication is achieved.

[0017] In the above scheme, the roughness of the ball cage surface can be increased so that the ball cage surface can store grease, further increasing the lubrication effect of the steel ball surface to increase the service life of the bearing.

[0018] Wheel hub bearings are limited by vehicle models and brake assembly designs, so they have great limitations. In a limited space, only by maximizing the bearing's load-bearing capacity and providing long-term lubrication can the bearing's operating reliability and service life be improved, thereby improving the vehicle's driving safety and performance.

[0019] Compared with the prior art, the front wheel hub bearing with long-term lubrication increases the size of the spherical surface of the large-diameter cage, thereby increasing the gap between the two sides of the cage after the ball is installed. When the steel ball rotates, sufficient grease can pass through the gap for long-term and effective lubrication, and within a limited space, the number of steel balls in each row is maximized, thereby maximizing the bearing capacity of the bearing, thereby achieving long-term lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the cage structure of the utility model;

[0022] Figure 3 For this utility model Figure 2 Schematic diagram of the top view structure.

[0023] In the figure: 1. Outer ring; 2. Inner ring assembly; 3. Raceway; 4. Steel ball; 5. Cage structure; 6. Ball cage; 7. Ball cage surface on large diameter side; 8. Ball cage surface on small diameter side; 9. Cage lock; 10. Inner ring A; 11. Inner ring B; 12. Sealing ring assembly; 13. Hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figures 1 to 3The utility model provides a technical solution: a front wheel hub bearing with long-term lubrication, including an outer ring 1 and an inner ring assembly 2, the inner ring assembly 2 includes an inner ring A10 and an inner ring B11, the inner ring A10 is connected to the inner ring B11, a sealing ring assembly 12 for sealing a steel ball 4 is arranged between the inner ring A10 and the outer ring 1, and between the inner ring B11 and the outer ring 1, a raceway 3 is arranged between the outer ring 1 and the inner ring assembly 2, a steel ball 4 is arranged in the raceway 3, a retaining frame structure 5 for positioning the steel ball 4 is arranged in the raceway 3, the retaining frame structure 5 includes a ball cage 6, a hole 13 for assembling the steel ball 4 is arranged in the ball cage 6, and the hole 13 in the ball cage 6 is close to the steel ball 4 The closest surface is the large-diameter side ball cage spherical surface 7, and the surface in the hole 13 of the ball cage 6 that is close to the steel ball 4 is the small-diameter side ball cage spherical surface 8. The large-diameter side ball cage spherical surface 7 is located at the lower end surface of the hole 13 in the ball cage 6, and the small-diameter side ball cage spherical surface 8 is located at the upper end surface of the hole 13 in the ball cage 6. The size of the large-diameter side ball cage spherical surface 7 is larger than the size of the small-diameter side ball cage spherical surface 8. The cross-sectional shape of the large-diameter side ball cage spherical surface 7 is similar to a "︵" shape. The two ends of the large-diameter side ball cage spherical surface 7 with a "︵"-shaped cross-sectional shape extend outward and connect with the small-diameter side ball cage spherical surface 8. The cross-sectional shape of the small-diameter side ball cage spherical surface 8 is similar to a "︶" shape. A retaining frame lock 9 for limiting the steel ball 4 is provided in the ball cage 6.

[0026] In the description of this specification, the terms "connect", "install", "fix", "set", etc. are understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. As in this example, for ordinary technicians in this field, the specific meanings of the above terms in this utility model or utility model can be understood according to the specific circumstances.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A front wheel hub bearing with long-term lubrication, characterized in that: The invention comprises an outer ring (1) and an inner ring assembly (2), wherein a raceway (3) is provided between the outer ring (1) and the inner ring assembly (2), wherein a steel ball (4) is provided in the raceway (3), wherein a retaining frame structure (5) for positioning the steel ball (4) and facilitating long-term lubrication is provided in the raceway (3), wherein the retaining frame structure (5) comprises a ball cage (6), wherein a hole (13) for assembling the steel ball (4) is provided in the ball cage (6), wherein a surface of the hole (13) in the ball cage (6) close to the steel ball (4) is a large-diameter side ball cage spherical surface (7), and the hole (13) in the ball cage (6) is in contact with the steel ball (4). The nearest surface is a small diameter side cage spherical surface (8), the large diameter side cage spherical surface (7) is located at the lower end surface of the hole (13) in the cage (6), the small diameter side cage spherical surface (8) is located at the upper end surface of the hole (13) in the cage (6), the large diameter side cage spherical surface (7) is larger than the small diameter side cage spherical surface (8), the cross-sectional shape of the large diameter side cage spherical surface (7) is similar to a "︵" shape, the two ends of the large diameter side cage spherical surface (7) having a cross-sectional shape similar to a "︵" shape extend outward and connect with the small diameter side cage spherical surface (8), and the cross-sectional shape of the small diameter side cage spherical surface (8) is similar to a "︶" shape.

2. The front wheel hub bearing with long-term lubrication according to claim 1, characterized in that: The ball cage (6) is provided with a retaining frame lock (9) for limiting the position of the steel ball (4).

3. The front wheel hub bearing with long-term lubrication according to claim 1, characterized in that: The inner ring assembly (2) comprises an inner ring A (10) and an inner ring B (11), wherein the inner ring A (10) and the inner ring B (11) are connected, and a sealing ring assembly (12) for sealing the steel ball (4) is provided between the inner ring A (10) and the outer ring (1), and between the inner ring B (11) and the outer ring (1).

Images