Double-row ball type slewing bearing

Abstract

The utility model discloses a double-row ball type slewing bearing, and belongs to the technical field of slewing bearings. A double-row ball type slewing bearing comprises an outer ring and an inner ring, a sealing ring is arranged above the position between the outer ring and the inner ring, the sealing ring is connected with the inner ring through a clamping groove, a backing ring is arranged below the position between the outer ring and the inner ring, the backing ring is attached to the outer ring and the inner ring, and a mounting shaft hole is formed in the inner side of the inner ring. In order to solve the problems that existing steel balls are located on the same vertical line, the supporting directions of the steel balls are the same, and effective supporting cannot be provided for pressure generated on the upper side and the lower side, an upper raceway is matched with supporting balls, so that the stress performance of a slewing bearing in the vertical direction can be enhanced, and side balls in a side raceway can be protected; and on the contrary, the side raceway is matched with the side balls, so that the side balls can be supported in the left-right direction, and the supporting balls can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of slewing bearings, in particular to a double-row ball slewing bearing. Background Art

[0002] Chinese patent publication number CN205047658U discloses a special-shaped double-row ball slewing bearing, which includes an outer ring, an inner ring, steel balls, steel ball spacers, rollers, roller spacers, sealing skins, and an oil filling cup. The axial and radial loads are independently borne by their respective raceways, reducing the impact of clearance on raceway life and improving the overall performance of the slewing bearing.

[0003] In the above patent, the steel balls are on the same vertical line, and the supporting directions they can provide are the same, and they cannot provide effective support for the pressure generated on the upper and lower sides. Utility Model Content

[0004] The purpose of the utility model is to provide a double-row ball slewing bearing, in which the upper raceway cooperates with the supporting balls to enhance the force performance of the slewing bearing in the upper and lower directions, and can also provide protection for the side balls in the side raceway to avoid friction between the side balls when the outer ring and the inner ring are subjected to force from above. Conversely, the side raceway cooperates with the side balls to provide support in the left and right directions and protect the supporting balls, which can solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-row ball slewing bearing, comprising an outer ring and an inner ring, a sealing ring is arranged above the outer ring and the inner ring, the sealing ring and the inner ring are connected by a slot, a gasket is arranged below the outer ring and the inner ring, the gasket is fitted with the outer ring and the inner ring, a mounting shaft hole is arranged on the inner side of the inner ring, the sealing ring can prevent dust from entering the gap between the outer ring and the inner ring, and the gasket can provide a buffering support when placed and installed, to avoid the outer ring and the inner ring from contacting and rubbing with the bottom equipment at the same time.

[0006] Furthermore, a lubricating oil hole is provided on the outer surface of the outer ring, and the lubricating oil hole extends through to the bottom of the outer ring, and lubricating oil can be injected into the upper raceway through the lubricating oil hole.

[0007] Furthermore, an upper raceway is provided between the outer ring and the inner ring, and a side raceway is provided on the outer side of the upper raceway. The upper raceway and the side raceway are staggered. The upper raceway cooperates with the supporting balls to enhance the force performance of the slewing bearing in the upper and lower directions, and can also provide protection for the side balls in the side raceway to avoid friction between the side balls when the outer ring and the inner ring are subjected to force.

[0008] Furthermore, support balls are provided inside the upper raceway, and side balls are provided inside the side raceway.

[0009] Furthermore, the surface of the upper raceway is provided with a plurality of guide grooves, which extend through and extend to the surface of the side raceway. The guide grooves are used to connect the upper raceway and the side raceway, so that the two groups of balls can be lubricated through the lubricating oil holes in only one direction.

[0010] Furthermore, a positioning ring support is provided between the side balls and the support balls, and the positioning ring support is rotatably connected to the side balls and the support balls respectively, wherein the positioning ring support is distributed in a ring shape inside the raceway, and the positioning ring support can maintain the spacing distance between the balls and play a limiting role.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the present invention, the upper raceway and the side raceway are staggered in distribution, wherein the upper raceway cooperates with the supporting balls to enhance the force performance of the slewing bearing in the up and down directions, and can also provide protection for the side balls in the side raceway to avoid friction between the side balls when the outer ring and the inner ring are subjected to force from above. Conversely, the side raceway cooperates with the side balls to provide support in the left and right directions and protect the supporting balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall front view of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the overall expanded structure of the utility model.

[0016] In the figure: 1. Outer ring; 2. Inner ring; 3. Sealing ring; 4. Side ball; 5. Support ball; 6. Spacer; 7. Positioning ring support; 101. Lubricating oil hole; 201. Mounting shaft hole; 202. Guide groove; 203. Upper raceway; 204. Side raceway. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In order to solve the problem that the existing steel balls are on the same vertical line and can only support the same direction, they cannot provide effective support for the pressure generated by the upper and lower sides; Figure 1-3, the utility model provides the following solutions:

[0019] A double-row ball slewing bearing includes an outer ring 1 and an inner ring 2. A sealing ring 3 is provided above the outer ring 1 and the inner ring 2. The sealing ring 3 is connected to the inner ring 2 through a slot. A backing ring 6 is provided below the outer ring 1 and the inner ring 2. The backing ring 6 fits with the outer ring 1 and the inner ring 2. A mounting shaft hole 201 is provided on the inner side of the inner ring 2. The sealing ring 3 can prevent dust from entering the gap between the outer ring 1 and the inner ring 2. The backing ring 6 can provide a buffering support during placement and installation to prevent the outer ring 1 and the inner ring 2 from contacting and rubbing with the bottom equipment at the same time.

[0020] Specifically, a lubricating oil hole 101 is provided on the outer surface of the outer ring 1 . The lubricating oil hole 101 extends through and to the bottom of the outer ring 1 . Lubricating oil can be injected into the upper raceway 203 through the lubricating oil hole 101 .

[0021] Specifically, an upper raceway 203 is provided between the outer ring 1 and the inner ring 2, a side raceway 204 is provided on the outer side of the upper raceway 203, a supporting ball 5 is provided inside the upper raceway 203, and a side ball 4 is provided inside the side raceway 204. The upper raceway 203 and the side raceway 204 are staggered, wherein the upper raceway 203 cooperates with the supporting ball 5 to enhance the force performance of the slewing bearing in the up and down directions, and can also provide protection for the side balls 4 in the side raceway 204 to avoid friction of the side balls 4 when the outer ring 1 and the inner ring 2 are subjected to force from above. Conversely, the side raceways 204204 cooperate with the side balls 4 to provide support in the left and right directions and protect the supporting balls 5.

[0022] Specifically, the surface of the upper raceway 203 is provided with a plurality of guide grooves 202, which extend through the surface of the side raceway 204. The guide grooves 202 are used to connect the upper raceway 203 and the side raceway 204, so that the two groups of balls can be lubricated only through the lubricating oil hole 101 in one direction.

[0023] Specifically, a positioning ring support 7 is provided between the side balls 4 and the support balls 5. The positioning ring support 7 is rotatably connected to the side balls 4 and the support balls 5 respectively. The positioning ring support 7 is distributed in a ring shape inside the raceway. The positioning ring support 7 can maintain the spacing distance between the balls and play a role in limiting.

[0024] Working principle: an upper raceway 203 is provided between the outer ring 1 and the inner ring 2, and a side raceway 204 is provided on the outside of the upper raceway 203. The upper raceway 203 and the side raceway 204 are staggered, wherein the upper raceway 203 cooperates with the supporting ball 5 to enhance the force performance of the slewing bearing in the up and down directions, and can also provide protection for the side balls 4 in the side raceway 204 to avoid friction of the side balls 4 when the outer ring 1 and the inner ring 2 are subjected to force from above. Conversely, the side raceways 204204 cooperate with the side balls 4 to provide support in the left and right directions and protect the supporting balls 5.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-row ball slewing bearing, characterized in that: The invention comprises an outer ring (1) and an inner ring (2), wherein a sealing ring (3) is arranged above the outer ring (1) and the inner ring (2), and the sealing ring (3) and the inner ring (2) are connected through a slot, and a gasket (6) is arranged below the outer ring (1) and the inner ring (2), and the gasket (6) fits the outer ring (1) and the inner ring (2), and a mounting shaft hole (201) is arranged on the inner side of the inner ring (2).

2. The double-row ball slewing bearing according to claim 1, characterized in that: The outer surface of the outer ring (1) is provided with a lubricating oil hole (101), and the lubricating oil hole (101) extends through to the bottom of the outer ring (1).

3. The double-row ball slewing bearing according to claim 1, characterized in that: An upper raceway (203) is provided between the outer ring (1) and the inner ring (2), and a side raceway (204) is provided on the outer side of the upper raceway (203).

4. The double-row ball slewing bearing according to claim 3, characterized in that: The upper rolling track (203) is provided with supporting balls (5) inside, and the side rolling track (204) is provided with side balls (4) inside.

5. The double-row ball slewing bearing according to claim 4, characterized in that: The surface of the upper raceway (203) is provided with a plurality of guide grooves (202), and the guide grooves (202) extend through and extend to the surface of the side raceway (204).

6. The double-row ball slewing bearing according to claim 4, characterized in that: A positioning ring support (7) is provided between the side balls (4) and the supporting balls (5), and the positioning ring support (7) is rotatably connected to the side balls (4) and the supporting balls (5), respectively, wherein the positioning ring support (7) is distributed in an annular shape inside the raceway.

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