CN211082554U

CN211082554U - Slewing bearing for mechanical transmission

Info

Publication number: CN211082554U
Application number: CN201922105835.4U
Authority: CN
Inventors: 许宁; 张赛; 杨杰
Original assignee: Xuzhou Fenghe Slewing Bearing Co ltd
Current assignee: Xuzhou Fenghe Slewing Bearing Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-24
Anticipated expiration: 2029-11-29

Abstract

A slewing bearing for mechanical transmission comprises an outer ring (1), an inner ring (2), an O-shaped sealing ring (3), a sealing strip (4), a steel ball (5) and a spacer block (6), wherein the upper end face of the outer ring (1) is provided with a first annular boss (1-4), the outer circumferential face of the outer ring (1) sequentially comprises a first step (1-1), a second step (1-2) and a third step (1-3) along the axial direction, and the third step (1-3) extends towards the direction away from the lower end face of the outer ring; the upper end surface of the inner ring (2) also comprises a second annular boss (2-5). The concave-convex structure that this application slewing bearing surface has first annular boss, second annular boss, first step, second step, third step to constitute for when this slewing bearing and mechanical transmission's base cooperation fix a position accurately, the noise is little during the operation, the shake is little.

Description

Slewing bearing for mechanical transmission

Technical Field

The utility model belongs to the bearing field, specific relate to and be used for mechanical transmission's slewing bearing.

Background

The slewing bearing is a large bearing capable of bearing comprehensive loads and can simultaneously bear larger axial and radial loads and overturning moments. However, the surface of the traditional slewing bearing is of a smooth and flat structure, so that the traditional slewing bearing is not accurately positioned when being matched with a mechanical transmission base, and further has the problems of high noise, large jitter and the like in the operation process, and the service life of the slewing bearing is shortened.

Disclosure of Invention

An object of the utility model is to provide a be used for mechanical transmission's slewing bearing, this slewing bearing fixes a position accurately when cooperating with mechanical transmission's base, and the noise is little, the shake is little during the operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a slewing bearing for mechanical transmission comprises an outer ring, an inner ring, an O-shaped sealing ring, a sealing strip, a steel ball and an isolating block, wherein the inner ring comprises a plug, a conical pin and a cylindrical counter bore; the outer ring comprises an oil filling hole, a raceway is formed between matching surfaces of the outer ring and the inner ring, and the outer ring and the inner ring realize relative rotation through steel balls and isolating blocks in the raceway; an annular groove is formed in the upper side face of the inner ring matched with the outer ring, and the O-shaped sealing ring is placed in the annular groove; the inner wall of the inner ring is provided with a plugging hole, the steel ball and the isolating block enter the raceway between the matching surfaces of the outer ring and the inner ring through the plugging hole, the plugging hole is filled with a plugging plug for sealing, and the plugging plug is fixed by using a taper pin; the oil filling holes are formed in the lower end face and the side wall of the outer ring and are used for filling lubricating oil into the raceway; the lower side surface of the outer ring matched with the inner ring is provided with a sealing strip; the upper end face of the outer ring is provided with a first annular boss, the outer circumferential face of the outer ring further comprises a first step, a second step and a third step along the shaft, and the third step extends towards the direction departing from the lower end face of the outer ring; the upper end surface of the inner ring also comprises a second annular boss.

When assembling with mechanical transmission's base, the concave-convex structure that slewing bearing surface of this application has first annular boss, second annular boss, first step, second step, third step to constitute compares with traditional surface is smooth slewing bearing who levels the structure, when coordinating with mechanical transmission's base, can realize accurate location. In addition, the outer surface of the slewing bearing has a concave-convex structure, a good clamping effect can be formed when the slewing bearing is matched with a mechanical transmission base, the slewing bearing is not easy to shake under the action of external force in the operation process, and the generated noise is small.

Drawings

FIG. 1 is a cross-sectional view of a pivoting support for a mechanical transmission of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the steel ball, spacer block of FIG. 1;

wherein: 1. an outer ring; 2. an inner ring; 3. an O-shaped sealing ring; 4. a sealing strip; 5. a steel ball; 6. an isolation block; 1-1, a first step; 1-2, a second step; 1-3, a third step; 1-4, a first annular boss; 1-5, a first oil hole; 1-6, a second oil hole; 2-1, the upper end surface of the inner ring; 2-2, blocking; 2-3, taper pin; 2-4, cylindrical counter bores; 2-5 and a second annular boss.

Detailed Description

The technical solution provided by the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a slewing bearing for mechanical transmission comprises an outer ring 1, an inner ring 2, an O-shaped sealing ring 3, a sealing strip 4, a steel ball 5 and an isolation block 6, wherein the inner ring 2 comprises a plug 2-2, a taper pin 2-3 and a cylindrical counter bore 2-4; the outer ring 1 comprises an oil filling hole, a raceway is formed between matching surfaces of the outer ring 1 and the inner ring 2, and the outer ring 1 and the inner ring 2 realize relative rotation through a steel ball 5 and an isolating block 6 in the raceway; an annular groove is formed in the upper side face of the inner ring 2 matched with the outer ring 1, and the O-shaped sealing ring 3 is placed in the annular groove to prevent lubricating oil in the raceway from leaking; the inner wall of the inner ring 2 is provided with a plugging hole, the steel ball 5 and the spacer block 6 enter the raceway between the matching surfaces of the outer ring 1 and the inner ring 2 through the plugging hole, the plugging hole is plugged by a plug 2-2 for sealing, and a taper pin 2-3 passes through a pin hole on the plug 2-2 to fix the plug 2-2; the oil filling holes are formed in the lower end face and the side wall of the outer ring 1; the lower side surface of the outer ring 1 matched with the inner ring 2 is provided with a sealing strip to prevent dust from entering the raceway and damaging the raceway, the steel ball and the isolating block; the upper end face of the outer ring 1 is provided with a first annular boss 1-4, the outer circumferential face of the outer ring 1 further comprises a first step 1-1, a second step 1-2 and a third step 1-3 along the axial direction, and the third step 1-3 extends in the direction away from the lower end face of the outer ring 1; the upper end surface 2-1 of the inner ring also comprises a second annular boss 2-5.

For convenience of processing, the inner diameter of the second annular boss 2-5 is the same as that of the inner ring 2.

In order to make the outer ring 1 have better clamping effect, as shown in fig. 1, the outer diameter of the second step 1-2 is larger than the outer diameters of the first step 1-1 and the third step 1-3.

In order to facilitate the addition of lubricating oil, the oil filling holes comprise a first oil filling hole 1-5 and a second oil filling hole 1-6, the second oil filling hole 1-6 is vertical to the side wall of the outer ring 2, and the lubricating oil is added into the raceway; the first oil filling hole 1-5 is positioned on the lower end face of the outer ring 1, is perpendicular to the second oil filling hole 1-6 and is communicated with the second oil filling hole 1-6.

Claims

1. A slewing bearing for mechanical transmission comprises an outer ring (1), an inner ring (2), an O-shaped sealing ring (3), a sealing strip (4), a steel ball (5) and an isolating block (6), wherein the outer ring comprises an oil filling hole, and the inner ring (2) comprises an inner ring upper end surface (2-1), a plug (2-2), a conical pin (2-3) and a cylindrical counter bore (2-4); a raceway is formed between matching surfaces of the outer ring (1) and the inner ring (2), and the outer ring (1) and the inner ring (2) realize relative rotation through steel balls (5) and isolating blocks (6) in the raceway; an annular groove is formed in the upper side face of the inner ring (2) matched with the outer ring (1), and the O-shaped sealing ring (3) is placed in the annular groove; the inner wall of the inner ring (2) is provided with plugging holes, the steel balls (5) and the isolating blocks (6) enter a raceway between matching surfaces of the outer ring (1) and the inner ring (2) through the plugging holes, the plugs (2-2) are plugged into the plugging holes for sealing, and the plugs (2-2) are fixed by using conical pins (2-3); the oil filling holes are formed in the lower end face and the side wall of the outer ring (1) and used for filling lubricating oil into the raceway; sealing strip (4) set up in outer lane (1) and inner circle (2) complex downside, its characterized in that: the upper end face of the outer ring (1) is provided with a first annular boss (1-4), the outer circumferential face of the outer ring (1) sequentially comprises a first step (1-1), a second step (1-2) and a third step (1-3) along the axial direction, and the third step (1-3) extends towards the direction away from the lower end face of the outer ring; the upper end surface (2-1) of the inner ring also comprises a second annular boss (2-5).

2. A slewing bearing for a mechanical transmission according to claim 1, wherein: the outer diameter of the second step (1-2) is larger than the outer diameters of the first step (1-1) and the third step (1-3).

3. A slewing bearing for a mechanical transmission according to claim 1 or 2, wherein: the oil filling holes comprise first oil filling holes (1-5) and second oil filling holes (1-6), the second oil filling holes (1-6) are perpendicular to the side wall of the outer ring (1), and lubricating oil is added into the raceway; the first oil filling hole (1-5) is positioned on the lower end face of the outer ring (1), is perpendicular to the second oil filling hole (1-6), and is communicated with the second oil filling hole (1-6).

4. A slewing bearing for a mechanical transmission according to claim 3, wherein: the inner diameter of the second annular boss (2-5) is the same as that of the inner ring (2).