Dust-proof ball bearing

Abstract

The utility model discloses a dustproof ball bearing, including inner ring and outer ring, is equipped with retainer, steel ball and dustproof board between inner ring and outer ring, and the side of dustproof board to steel ball is equipped with sealing element, and sealing element includes fixed part, and fixed part is located on dustproof board, and fixed part extends outward and forms sealing lip, and the contact surface of sealing lip and inner ring, outer ring forms elastic contact seal, and the elastic chucking mechanism is equipped in outer ring, and the corresponding end surface of dustproof board is equipped with the clamping slot, and one end of elastic chucking mechanism is clamped into the clamping slot, and the outer side of outer ring is equipped with V type groove, and the stress intensity of bearing is improved through assembling ball in V type groove, and the double-lip structure of main sealing lip and vice sealing lip is adopted through setting sealing element, and the contact surface of sealing lip and inner ring, outer ring forms elastic contact seal, and the overall sealing reliability of bearing is improved obviously, and the service life of bearing under the harsh working condition such as dust, dampness is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular relates to a dustproof ball bearing. Background Technology

[0002] Bearings are important components widely used in mechanical systems to support loads on rotating shafts. For example, a deep groove ball bearing with patent publication number CN222717294U achieves sealing by opening connecting holes and fixing holes on the outer and inner rings of the bearing, respectively, and using a plastic seal with one end inserted into the connecting hole and the other end deformable and inserted into the fixing hole to abut against the hole wall. However, it has problems such as insufficient stability, the need to strengthen the connection strength of the dustproof plate under dynamic working conditions, and limited functionality. A new type of bearing structure is needed that can provide a more durable and reliable sealing effect in harsh environments, while also having stronger installation stability and specific functional adaptability. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a dustproof ball bearing that improves the sealing performance of the bearing and the stability of the dustproof plate connection.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A dustproof ball bearing includes an inner ring and an outer ring. A cage, steel balls, and a dustproof plate are provided between the inner ring and the outer ring. A seal is provided on the side of the dustproof plate facing the steel balls. The seal includes a fixing part, which is located on the dustproof plate. The fixing part extends outward to form a sealing lip. The sealing lip forms an elastic contact seal with the contact surfaces of the inner ring and the outer ring, thereby improving the sealing effect of the dustproof plate.

[0006] Furthermore, an elastic clamping mechanism is provided inside the outer ring, and a groove is provided on the corresponding end face of the dustproof plate. One end of the elastic clamping mechanism is inserted into the groove to improve the connection strength of the dustproof plate.

[0007] Furthermore, a V-groove is provided on the outer side of the outer ring, and the bearing's strength is improved by assembling balls in the V-groove.

[0008] Furthermore, the dustproof plate has a mounting cavity for installing an elastic clamping mechanism. The elastic clamping mechanism includes a spring and a movable rod. The two ends of the spring are connected to the mounting cavity and the movable rod, respectively. The other end of the movable rod passes through the outer ring and is engaged in the slot.

[0009] Furthermore, a connecting rod is provided outside the movable rod, with one end of the connecting rod extending to the outside of the outer ring. The connecting rod is connected to a cover plate, the diameter of which is larger than the opening diameter of the mounting cavity, for sealing the mounting cavity.

[0010] Furthermore, the two ends of the dustproof plate are respectively installed into the outer ring and the inner ring, and both ends of the dustproof plate are provided with annular grooves, with the fixing part of the seal located in the annular groove.

[0011] Furthermore, the sealing lip includes a main sealing lip and a secondary sealing lip. The two main sealing lips abut against the outer ring and the inner ring respectively, and the secondary sealing lip abuts against the dustproof plate.

[0012] Furthermore, the contact surfaces of both the main sealing lip and the secondary sealing lip are provided with a corrugated structure.

[0013] Furthermore, the outer side of the cover plate is provided with a groove.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] 1. In this utility model, by setting a sealing element and adopting a double-lip structure of main sealing lip and secondary sealing lip, the contact surfaces of the sealing lip and the inner and outer rings form an elastic contact seal, which significantly improves the overall sealing reliability of the bearing and extends the service life of the bearing under harsh working conditions such as dust and moisture.

[0016] 2. In this utility model, an elastic locking mechanism consisting of a spring and a movable rod is provided inside the outer ring, which cooperates with the groove on the end face of the dustproof plate to provide an active and continuous axial locking force for the dustproof plate. This enhances the connection strength and stability of the dustproof plate under dynamic working conditions such as vibration and impact, and effectively prevents it from loosening.

[0017] 3. In this utility model, by setting a V-shaped groove on the outer side of the outer ring, the force is reasonably distributed, which significantly improves the bearing capacity and guiding accuracy, expands its application range in linear guides, industrial robots and other applications requiring high-precision linear motion, and improves the practicality of the bearing. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a front cross-sectional view of a dustproof ball bearing according to the present invention;

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the local structure at point B.

[0022] In the diagram: 1-Inner ring; 2-Outer ring; 3-Cage; 4-Steel ball; 5-Dustproof plate; 6-Seal; 7-Fixing part; 8-Sealing lip; 9-Elastic locking mechanism; 10-Slot; 11-V-groove; 12-Mounting cavity; 13-Spring; 14-Moving rod; 15-Connecting rod; 16-Cover plate; 17-Annular groove; 18-Main sealing lip; 19-Secondary sealing lip; 20-Groove. Detailed Implementation

[0023] like Figures 1 to 3 As shown, this utility model discloses a dustproof ball bearing, which mainly includes an inner ring 1, an outer ring 2, a cage 3 disposed between the inner ring 1 and the outer ring 2, steel balls 4 serving as rolling elements, and dustproof plates 5 disposed on both sides of the bearing.

[0024] The outer surface of the outer ring 2 is provided with a V-groove 11, the shape of which can adopt an optimized "Gothic" arc profile. This structure allows the force on the bearing to be rationally distributed on the guide rail, significantly improving the bearing's load-bearing capacity.

[0025] The dustproof plate 5 is installed in the corresponding slots of the outer ring 2 and the inner ring 1 at both ends, and the side of the dustproof plate 5 facing the steel ball 4 inside the bearing is equipped with a high-performance seal 6.

[0026] The seal 6 includes a fixing part 7 embedded in the end face of the dustproof plate 5, and a flexible sealing lip 8 formed by extending outward from the fixing part 7.

[0027] The sealing lip 8 forms an elastic contact seal with the corresponding surfaces of the inner ring 1 and the outer ring 2, effectively preventing the entry of external contaminants (such as dust and cutting fluid) and preventing the leakage of internal grease.

[0028] The sealing lip 8 adopts a double-lip design, specifically including a main sealing lip 18 and a secondary sealing lip 19. The main sealing lip 18 extends towards the steel ball 4 inside the bearing, and its main function is to strongly block external contaminants. The secondary sealing lip 19 faces towards the dust cover 5 body, and it works in conjunction with the main sealing lip 18 to form a small oil reservoir between them, which helps to maintain lubrication and further prevent grease leakage.

[0029] To enhance sealing performance and durability, micro-wave or serrated textures are machined on the contact surfaces of the main sealing lip 18 and the secondary sealing lip 19 (not shown in the attached figures).

[0030] An elastic locking mechanism 9 is provided inside the outer ring 2, and correspondingly, a groove 10 is machined on the end face of the dustproof plate 5. The movable end of the elastic locking mechanism 9 can be movably locked into the groove 10 under the action of the spring 13, providing additional axial locking force for the dustproof plate 5, which greatly improves its connection strength and reliability in vibration environment, thereby extending the service life of the entire bearing.

[0031] The elastic clamping mechanism 9 is housed in the mounting cavity 12 machined within the outer ring 2. It mainly consists of a spring 13 and a movable rod 14. A limiting groove is provided on the inner wall of the mounting cavity 12. The spring 13 is located in the limiting groove, and one end of the movable rod 14 is located in the limiting groove to limit the movement trajectory of the movable rod 14. The spring 13 is pre-pressed between the limiting groove of the mounting cavity 12 and the movable rod 14 to provide a continuous thrust for the movable rod 14. The elastic force of the spring 13 allows the other end of the movable rod 14 to pass through the outer ring 2 and be engaged in the slot 10 of the dustproof plate 5.

[0032] To facilitate maintenance and ensure cleanliness, the movable rod 14 can be connected to a connecting rod 15 extending to the outside of the outer ring 2. A cover plate 16 is fixed to the end of the connecting rod 15. The diameter of the cover plate 16 is larger than the opening of the mounting cavity 12, and the bottom surface of the cover plate 16 abuts against the outer ring 2, which can effectively seal the mounting cavity 12.

[0033] A groove 20 is provided on the outer side of the cover plate 16. The groove 20 can drive the connecting rod 15 to move, thereby driving the movable rod 14 to disengage from the slot 10, making it convenient to disassemble the dustproof plate 5.

[0034] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A dustproof ball bearing, comprising an inner ring and an outer ring, wherein a cage, steel balls, and a dustproof plate are provided between the inner ring and the outer ring, characterized in that: The dustproof plate has a sealing element on the side facing the steel ball. The sealing element includes a fixing part, which is disposed on the dustproof plate. The fixing part extends outward to form a sealing lip. The sealing lip forms an elastic contact seal with the contact surfaces of the inner and outer rings, thereby improving the sealing effect of the dustproof plate.

2. The dustproof ball bearing according to claim 1, characterized in that: The outer ring is provided with an elastic clamping mechanism, and the corresponding end face of the dustproof plate is provided with a groove. One end of the elastic clamping mechanism is inserted into the groove to improve the connection strength of the dustproof plate.

3. A dustproof ball bearing according to claim 1, characterized in that: The outer ring has a V-groove on its outer side. By assembling balls in the V-groove, the bearing's strength is improved.

4. A dustproof ball bearing according to claim 2, characterized in that: The dustproof plate has a mounting cavity for installing the elastic clamping mechanism. The elastic clamping mechanism includes a spring and a movable rod. The two ends of the spring are respectively connected to the mounting cavity and the movable rod. The other end of the movable rod passes through the outer ring and is engaged in the slot.

5. A dustproof ball bearing according to claim 4, characterized in that: The movable rod is provided with a connecting rod, one end of which extends to the outside of the outer ring. The connecting rod is connected to a cover plate, the diameter of which is larger than the opening diameter of the mounting cavity, for sealing the mounting cavity.

6. A dustproof ball bearing according to claim 1, characterized in that: The dustproof plate is installed at both ends into the outer ring and the inner ring respectively, and both ends of the dustproof plate are provided with annular grooves, and the fixing part of the sealing element is provided in the annular groove.

7. A dustproof ball bearing according to claim 1, characterized in that: The sealing lip includes a main sealing lip and a secondary sealing lip. The main sealing lips on both sides abut against the outer ring and the inner ring, respectively, and the secondary sealing lip abuts against the dustproof plate.

8. A dustproof ball bearing according to claim 7, characterized in that: The contact surfaces of both the main sealing lip and the secondary sealing lip are provided with a corrugated structure.

9. A dustproof ball bearing according to claim 5, characterized in that: The outer side of the cover plate is provided with a groove.

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