CN213870728U

CN213870728U - Compound shield precision bearing

Info

Publication number: CN213870728U
Application number: CN202022846842.2U
Authority: CN
Inventors: 王洪伦; 林联涛
Original assignee: Ningbo Zhicheng Bearing Co ltd
Current assignee: Ningbo Zhicheng Bearing Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-08-03
Anticipated expiration: 2030-12-01

Abstract

The utility model relates to the technical field of bearings, in particular to a composite dust cover precision bearing, which comprises an outer ring and an inner ring, wherein the outer surface of an annular block is contacted with the inner surface of the outer ring, a limiting mechanism is arranged between the outer surface of the annular block and the outer ring, a dust cover is fixed on the outer side of the annular block, and one side of the dust cover is contacted with the outer ring and one side of the outer part of the inner ring; the limiting mechanism comprises an annular groove formed in the inner surface of the outer ring and a limiting block connected to the outer surface of the inner ring, the limiting block is rotatably arranged on the inner side of the annular groove, and the annular groove and the limiting block are in clearance fit. The utility model discloses have fine dirt-proof effect, avoid the dust to get into the inboard and the ball combination of bearing, cause the frictional force increase between ball and the spacing groove, improved the condition of the wearing and tearing of ball, be favorable to extending the life of bearing.

Description

Compound shield precision bearing

Technical Field

The utility model relates to a bearing technical field especially relates to a compound shield precision bearing.

Background

A bearing is a mechanical element that limits relative motion to a desired range of motion and reduces friction between moving parts. The design of the bearings can provide free linear motion or free rotation about a fixed axis of the moving part, and can also prevent motion by controlling the vector of the normal force acting on the moving part;

the bearing in the existing market has no dustproof function, so that dust enters the inner side of the bearing and contacts with oil on the outer surface of the ball to greatly influence the rolling of the ball.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a composite dust cover precision bearing.

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

a composite dust cover precision bearing is designed, which comprises an outer ring and an inner ring, wherein the inner ring is positioned at the inner side of the outer ring, a gap is arranged between the inner surface of the outer ring and the outer surface of the inner ring, the middle part of the inner side of the outer ring and the middle part of the outer side of the inner ring are both provided with a limiting groove, the two limiting grooves are both arranged in an annular shape, a plurality of balls are connected between the inner sides of the two limiting grooves in a rolling manner, the ball is in interference fit with the two limiting grooves, an annular block is rotationally arranged at a gap between the outer ring and the inner ring, the inner surface of the annular block is contacted with the outer surface of the inner ring, the outer surface of the annular block is contacted with the inner surface of the outer ring, a limiting mechanism is arranged between the outer surface of the annular block and the outer ring, dust covers are fixed on the outer sides of the annular block, and one sides of the dust covers are in contact with the outer ring and one side of the outer portion of the inner ring;

the limiting mechanism comprises an annular groove formed in the inner surface of the outer ring and a limiting block connected to the outer surface of the inner ring, the limiting block is rotatably arranged on the inner side of the annular groove, and the annular groove and the limiting block are in clearance fit.

Preferably, the size of the limiting block is matched with the size of a gap between the outer ring and the inner ring, and the limiting block is not in contact with the balls.

Preferably, the inner surface of the inner ring is plated with a wear-resistant layer, and the wear-resistant layer is a zinc-chromium alloy layer.

Preferably, the dust cover is arranged in an annular shape, and the diameter of the shaft hole in the middle of the dust cover is larger than that of the shaft hole in the middle of the inner ring.

The utility model provides a pair of compound shield precision bearing, beneficial effect lies in: this compound shield precision bearing has fine dirt-proof effect, avoids the inboard and the ball combination that the dust got into the bearing, causes the frictional force increase between ball and the spacing groove, has improved the condition of the wearing and tearing of ball, is favorable to extending the life of bearing.

Drawings

Fig. 1 is a structural front view of the composite dust cover precision bearing provided by the utility model.

Fig. 2 is a schematic structural view of a cross section a-a of the composite dust cap precision bearing according to the present invention.

Fig. 3 is an enlarged view of a portion B of the composite dust cap precision bearing of fig. 2.

In the figure: the dustproof cover comprises a dustproof cover 1, an outer ring 2, a limiting mechanism 3, an annular groove 31, a limiting block 32, an inner ring 4, a limiting groove 5, a ball 6, an annular block 7 and a wear-resistant layer 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1-2, a composite dust cap precision bearing comprises an outer ring 2 and an inner ring 4, wherein the inner ring 4 is located on the inner side of the outer ring 2, the outer ring 2 is fixed on a support, and the inner ring 4 is fixedly connected with a shaft body, so that the inner ring 4 of the shaft body rotates simultaneously.

A gap is formed between the inner surface of the outer ring 2 and the outer surface of the inner ring 4, the middle part of the inner side of the outer ring 2 and the middle part of the outer side of the inner ring 4 are both provided with a limiting groove 5, the two limiting grooves 5 are both arranged in an annular shape, a plurality of balls 6 are connected between the inner sides of the two limiting grooves 5 in a rolling manner, the balls 6 and the two limiting grooves 5 are in interference fit, an annular block 7 is rotatably arranged at the gap between the outer ring 2 and the inner ring 4, the inner surface of the annular block 7 is in mutual contact with the outer surface of the inner ring 4, the outer surface of the annular block 7 is in mutual contact with the inner surface of the outer ring 2, a dust cover 1 is fixed on the outer side of the annular block 7, and one side of the dust cover 1 is in mutual contact with the outer ring 2 and one side of the outer part of the inner ring 4; dust cover 1 laminates in

outer lane

2 and 4 outsides of inner circle to effectual inboard and the ball 6 combination of avoiding the dust to get into spacing groove 5 causes the frictional force increase between ball 6 and the spacing groove 5, and the condition that has improved the wearing and tearing of ball 6 appears, is favorable to prolonging the life of bearing.

The size of stopper 32 matches each other with the gap size between outer lane 2 and the inner circle 4, and does not contact each other between stopper 32 and the ball 6 to can not cause the influence to the rotation of ball 6.

The inner surface of the inner ring 4 is plated with a wear-resistant layer 8, the wear-resistant layer 8 is specifically a zinc-chromium alloy layer, the dust cover 1 is arranged in an annular mode, the diameter of a shaft hole in the middle of the dust cover 1 is larger than that of the shaft hole in the middle of the inner ring 4, and the zinc-chromium alloy has the characteristic of wear resistance and can protect the inner ring 4.

Example 2

Referring to fig. 3, the difference between this embodiment and embodiment 1 is that a limiting mechanism 3 is disposed between the outer surface of the annular block 7 and the outer ring 2, the limiting mechanism 3 includes an annular groove 31 formed in the inner surface of the outer ring 2 and a limiting block 32 connected to the outer surface of the inner ring 4, the limiting block 32 is rotatably disposed inside the annular groove 31, the annular groove 31 and the limiting block 32 are in clearance fit, the annular groove 31 and the limiting block 32 are mutually matched, the position of the dust cover 1 is fixed, and the dust cover 1 is prevented from falling off.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a compound shield precision bearing, includes outer lane (2) and inner circle (4), inner circle (4) are located the inboard of outer lane (2), its characterized in that, be provided with the gap between the internal surface of outer lane (2) and the surface of inner circle (4), spacing groove (5) have all been seted up at the inboard middle part of outer lane (2) and the outside middle part of inner circle (4), two spacing groove (5) all are the annular setting, two roll connection has a plurality of balls (6) between the inboard of spacing groove (5), ball (6) and two be interference fit between spacing groove (5), the gap department between outer lane (2) and inner circle (4) rotates and is provided with annular piece (7), the internal surface and the inner circle (4) surface of annular piece (7) mutually contact, the external surface and the internal surface of outer lane (2) of annular piece (7) mutually contact, a limiting mechanism (3) is arranged between the outer surface of the annular block (7) and the outer ring (2), a dust cover (1) is fixed on the outer side of each annular block (7), and one side of the dust cover (1) is in contact with the outer side of the outer ring (2) and one side of the outer part of the inner ring (4);

stop gear (3) are including seting up ring channel (31) and the stopper (32) of connecting at inner circle (4) surface at outer lane (2) internal surface, stopper (32) rotate the inboard that sets up at ring channel (31), and be clearance fit between ring channel (31) and stopper (32).

2. The composite dust cover precision bearing is characterized in that the size of the limiting block (32) is matched with the size of a gap between the outer ring (2) and the inner ring (4), and the limiting block (32) is not in contact with the ball (6).

3. A composite dust cover precision bearing according to claim 1, characterized in that the inner surface of the inner ring (4) is coated with a wear resistant layer (8), and the wear resistant layer (8) is in particular a zinc-chromium alloy layer.

4. The composite dust cover precision bearing according to claim 1, wherein the dust cover (1) is annular, and the diameter of the shaft hole in the middle of the dust cover (1) is larger than that of the shaft hole in the middle of the inner ring (4).