Sealing type slewing bearing

Abstract

The utility model discloses a sealing type slewing bearing which comprises an inner ring and an outer ring which are arranged from inside to outside, a plurality of balls are arranged between the inner ring and the outer ring, the end face of the inner ring is higher than the end face of the outer ring, a sealing ring is arranged on the side face of the inner ring, and the inner ring and the outer ring are arranged in parallel. An annular protrusion is formed on the lower end face of the sealing ring, the end face of the outer ring is sunken downwards to form an annular groove, the annular protrusion is rotatably clamped in the annular groove, a gap exists between the lower end face of the sealing ring and the end face of the outer ring, and a rubber ring with a U-shaped section is detachably arranged at the end of the sealing ring. The problems that in the prior art, a rubber ring is arranged on the surface of a slewing bearing, one end of the rubber ring is clamped to the side face of an inner ring, the other end of the rubber ring is attached to the end face of an outer ring, after long-time use, the elasticity of the sealing rubber ring is reduced, the end of the rubber ring is prone to upwarp, and the sealing performance is reduced are solved.

Description

Technical Field

[0001] The utility model relates to a slewing bearing, in particular to a sealed slewing bearing. Background Art

[0002] A slewing bearing, also known as a turntable bearing or rotary bearing, is a large bearing capable of simultaneously bearing axial and radial loads and overturning moments. It is crucial in a variety of industrial applications. A sealing rubber ring is often placed between the inner and outer rings of a slewing bearing to prevent dust and other foreign matter from entering the bearing. For example, Chinese patent number CN202222446245.X provides a roller-type slewing bearing comprising an outer ring and an inner ring. The outer ring is fitted over the inner ring, with a square raceway between the two rings. A transmission mechanism is located within the raceway. The inner circumferential wall of the inner ring is provided with several circular grooves. A rotating mechanism is located at the center of each groove. A grease nipple lubrication mechanism is located within the grooves and on the periphery of the rotating mechanism. Conventional slewing bearings, such as those in the prior art, are often provided with a sealing rubber ring. One end of the sealing rubber ring is typically engaged with the side of the inner ring and the other end is in contact with the end face of the outer ring. After prolonged use, the elastic force of the sealing rubber ring decreases, causing the end of the sealing rubber ring to easily warp, resulting in a decrease in sealing performance. Utility Model Content

[0003] The purpose of the utility model is to provide a sealed slewing bearing, which solves the problem in the prior art that the surface of the slewing bearing is provided with a rubber ring, one end of which is engaged with the side surface of the inner ring and the other end is in contact with the end face of the outer ring. After long-term use, the elastic force of the sealing rubber ring will decrease, causing its end to easily warp, resulting in a decrease in sealing performance.

[0004] In order to achieve the above-mentioned object, the utility model provides a sealed slewing bearing, which includes an inner ring and an outer ring arranged from the inside to the outside, a plurality of balls are arranged between the inner ring and the outer ring, the end face of the inner ring is higher than the end face of the outer ring, a sealing ring is provided on the side of the inner ring, the lower end face of the sealing ring is formed with an annular protrusion, the end face of the outer ring is recessed downward to form an annular groove, the annular protrusion is rotatably engaged in the annular groove, a gap is formed between the lower end face of the sealing ring and the end face of the outer ring, and a rubber ring with a U-shaped cross-section is detachably provided at the end of the sealing ring.

[0005] Preferably, a bending portion is formed at the upper end of the sealing ring, the bending portion is in contact with the end surface of the inner ring, and the bending portion is fastened to the end surface of the inner ring by a first screw.

[0006] Preferably, an O-ring is provided at the joint between the bent portion and the side surface of the inner ring.

[0007] Preferably, a compression ring is fastened to the end surface of the sealing ring by a second screw, so that the compression ring can press the rubber ring at least partially against the end surface of the sealing ring.

[0008] Preferably, the lower end of the annular protrusion is an arc-shaped structure, and the bottom of the annular groove forms a groove bottom structure that matches the arc-shaped structure.

[0009] Beneficial Effects: The present invention provides a sealed slewing bearing comprising an inner ring and an outer ring arranged from the inside out, with a plurality of balls disposed between the inner and outer rings. The end face of the inner ring is higher than the end face of the outer ring. A sealing ring is disposed on the side face of the inner ring. The lower end face of the sealing ring is formed with an annular protrusion, and the end face of the outer ring is recessed downward to form an annular groove. The annular protrusion rotatably engages within the annular groove. A gap is formed between the lower end face of the sealing ring and the end face of the outer ring. A U-shaped rubber ring is detachably disposed at the end of the sealing ring. The sealing ring is disposed on the end face of the outer ring and is fastened to the side face of the inner ring. The sealing ring can prevent foreign matter from entering the interior. A U-shaped rubber ring is disposed at the end of the sealing ring, with the lower end of the rubber ring located in the gap between the sealing ring and the outer ring. This prevents the rubber ring from warping after long-term use, effectively ensuring sealing performance.

[0010] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 This is a structural diagram of the sealed slewing bearing provided by the utility model;

[0013] Figure 2 This is a cross-sectional view of the sealed slewing bearing provided by the utility model;

[0014] Figure 3 yes Figure 2 Enlarged view of part A.

[0015] Description of Reference Numerals

[0016] 1-Inner ring; 2-Outer ring; 3-Ball; 4-Sealing ring; 5-First screw; 6-Second screw; 7-Pressure ring; 8-Rubber ring; 9-O-ring; 10-Annular protrusion. DETAILED DESCRIPTION

[0017] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0018] like Figure 1-3 The present invention provides a sealed slewing bearing comprising an inner ring 1 and an outer ring 2, arranged from the inside out. A plurality of balls 3 are disposed between the inner ring 1 and the outer ring 2. The end face of the inner ring 1 is higher than the end face of the outer ring 2. A sealing ring 4 is disposed on the side of the inner ring 1. The lower end face of the sealing ring 4 is formed with an annular protrusion 10. The end face of the outer ring 2 is recessed downward to form an annular groove. The annular protrusion 10 rotatably engages within the annular groove. A gap exists between the lower end face of the sealing ring 4 and the end face of the outer ring 2. A removable U-shaped rubber ring 8 is disposed at the end of the sealing ring 4. A sealing ring is disposed on the end face of the outer ring and is fastened to the side face of the inner ring. This seal prevents foreign matter from entering the bearing. A U-shaped rubber ring is also disposed at the end of the sealing ring, with its lower end located in the gap between the sealing ring and the outer ring. This prevents the rubber ring from warping over time, effectively ensuring sealing performance.

[0019] In a preferred embodiment of the present invention, in order to effectively fasten the sealing ring to the inner ring 1 and facilitate the installation and disassembly of the sealing ring, a bending portion is formed at the upper end of the sealing ring 4, and the bending portion is in contact with the end face of the inner ring 1. The bending portion is fastened to the end face of the inner ring 1 by a first screw 5.

[0020] In a preferred embodiment of the present invention, in order to improve the sealing performance between the bent portion and the side surface of the inner ring 1 , an O-ring 9 is provided at the joint between the bent portion and the side surface of the inner ring 1 .

[0021] In a preferred embodiment of the present invention, in order to be able to press and fix the rubber ring on the end of the sealing ring to facilitate the replacement and installation of the rubber ring, the end face of the sealing ring 4 is fastened with a clamping ring 7 by a second screw 6, so that the clamping ring 7 can press the rubber ring 8 at least partially on the end face of the sealing ring 4.

[0022] In a preferred embodiment of the present invention, in order to enable the annular protrusion to rotate smoothly in the annular groove, the lower end of the annular protrusion 10 is an arc-shaped structure, and the bottom of the annular groove forms a groove bottom structure that cooperates with the arc-shaped structure.

[0023] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0024] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0025] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A sealed slewing bearing, comprising an inner ring (1) and an outer ring (2) arranged from the inside out, a plurality of balls (3) being arranged between the inner ring (1) and the outer ring (2), characterized in that: The end face of the inner ring (1) is higher than the end face of the outer ring (2); a sealing ring (4) is provided on the side of the inner ring (1); an annular protrusion (10) is formed on the lower end face of the sealing ring (4); the end face of the outer ring (2) is recessed downward to form an annular groove; the annular protrusion (10) is rotatably engaged in the annular groove; a gap is provided between the lower end face of the sealing ring (4) and the end face of the outer ring (2); and a rubber ring (8) with a U-shaped cross section is detachably provided at the end of the sealing ring (4).

2. The sealed slewing bearing according to claim 1, characterized in that: A bending portion is formed at the upper end of the sealing ring (4), and the bending portion is in contact with the end face of the inner ring (1). The bending portion is fastened to the end face of the inner ring (1) by a first screw (5).

3. The sealed slewing bearing according to claim 2, characterized in that: An O-type sealing ring (9) is provided at the joint between the bent portion and the side surface of the inner ring (1).

4. The sealed slewing bearing according to claim 3, characterized in that: The end face of the sealing ring (4) is fastened with a compression ring (7) via a second screw (6), so that the compression ring (7) can press the rubber ring (8) at least partially against the end face of the sealing ring (4).

5. The sealed slewing bearing according to claim 4, characterized in that: The lower end of the annular protrusion (10) is an arc-shaped structure, and the bottom of the annular groove forms a groove bottom structure that matches the arc-shaped structure.

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