CN217029672U - High-precision rolling bearing - Google Patents

Abstract

The utility model provides a high-precision rolling bearing, which belongs to the technical field of bearings. The invention solves the problem that the steel balls in the existing rolling bearing are easily worn out when the outer ring of the bearing and the inner ring of the bearing are worn at high speed. This high-precision rolling bearing includes a bearing main body consisting of an outer ring, an inner ring, a number of steel balls and a cage for fixing the steel balls. The outer rolling groove for the steel balls is formed on the wall of the outer ring, and the wall of the inner ring is provided with the steel balls. The rolling inner rolling groove, the outer ring and the inner ring are both provided with annular grooves on the same side end surface, both annular grooves are provided with fixed ring frames, and annular oil storage grooves are opened on the fixed ring frame, and each annular oil storage groove is stored in the annular groove. There is lubricating grease, the inner wall of the fixed ring frame is spaced with a number of oil passages which are all connected with the end of the annular oil storage tank, and the oil passages are all inclined. The utility model has the advantages of preventing the wear of the steel balls and improving the service life of the steel balls and the service life of the entire bearing.

Description

A high-precision rolling bearing

technical field

The utility model belongs to the technical field of bearings, and relates to a rolling bearing, in particular to a high-precision rolling bearing.

Background technique

Bearings are an important component in contemporary machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. The structure of the rolling bearing mainly includes the bearing outer ring, the bearing inner ring, the cage and the steel ball. When the steel ball rotates at high speed, it is easy to cause the bearing outer ring and the bearing inner ring to wear. If the wear is serious, the rolling bearing will have the problem of unstable support, affecting the rolling bearing. Transmission accuracy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-precision rolling bearing with lubricating function in view of the above problems existing in the prior art.

The purpose of this utility model can be achieved through the following technical solutions: a high-precision rolling bearing, comprising a bearing main body consisting of an outer ring, an inner ring, a plurality of steel balls and a cage for fixing the steel balls, and a wall surface of the outer ring is provided with a The outer rolling groove of the steel ball rolling, the inner rolling groove for the steel ball rolling is opened on the wall surface of the inner ring, and it is characterized in that the outer ring and the inner ring are provided with annular grooves on the same side end surface, and the two annular grooves are inside Each is provided with a fixed ring frame, and an annular oil storage tank is opened on the fixed ring frame, and each of the annular oil storage grooves stores lubricating grease. The oil passages connected to the ends of the oil storage tanks are all inclined;

The wall surface of the outer ring is provided with an oil inlet channel that communicates with the corresponding oil passage at the positions corresponding to the steel balls. The axis coincides with the central axis of the corresponding oil passage;

On the wall surface of the inner ring, the positions corresponding to the steel balls are provided with two oil inlet passages that communicate with the corresponding oil passages. The axis coincides with the central axis of the corresponding oil passage.

In the above-mentioned high-precision rolling bearing, a fixing plate 1 is installed on the outer ring to hide the corresponding fixing ring frame, and the inner ring is installed with a fixing plate 1 that hides the corresponding fixing ring frame inside. fixed plate two;

A sealing ring 1 is sealed between the fixed plate 1 and the outer ring, and the sealing ring 1 is two, and is separately sealed and sleeved on the inner and outer peripheral walls of the corresponding fixing ring frame;

A second sealing ring is sealed between the second fixing plate and the inner ring, and the second sealing ring is two, which are respectively sealed and sleeved on the inner and outer peripheral walls of the corresponding fixing ring frame.

In the above-mentioned high-precision rolling bearing, the first sealing ring and the second sealing ring are both formed by an outer sealing lip and an inner sealing lip, and a pressing gap is formed between the outer sealing ring and the inner sealing ring, so The outer sealing ring is sealed against the end of the fixed ring frame, and the inner sealing ring is sealed against the peripheral wall of the fixed ring frame.

In the above-mentioned high-precision rolling bearing, the outer sealing lip of the sealing ring 1 has an arc-shaped convex lip that protrudes outward, and the inner wall of the fixing plate 1 is provided with a step for the lip to seal and snap into. groove.

In the above-mentioned high-precision rolling bearing, the middle parts of the inner walls of the fixed plate 1 and the fixed plate 2 have sealing step rings that protrude axially outward and protrude into the corresponding annular oil storage grooves.

In the above-mentioned high-precision rolling bearing, the first fixing plate and the second fixing plate are respectively fixedly connected to the outer ring and the inner ring through fixing bolts.

In the above-mentioned high-precision rolling bearing, an included angle is formed between the central axis of the oil passage and the central axis of the longitudinal section of the annular oil storage groove, and the included angle is an obtuse angle.

In the above-mentioned high-precision rolling bearing, a dust cover is also provided between the outer ring and the inner ring.

Compared with the prior art, the high-precision rolling bearing lubricates the steel balls during operation through the lubricating device, prevents the steel balls from being worn, and increases the service life of the steel balls and the service life of the entire bearing.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the high-precision rolling bearing.

FIG. 2 is a schematic cross-sectional structure diagram of the high-precision rolling bearing.

FIG. 3 is an enlarged schematic view of the structure of the part A of FIG. 2 .

In the figure, 1, outer ring; 2, inner ring; 3, steel ball; 4, cage; 5, outer rolling groove; 6, inner rolling groove; 7, fixed ring frame; 8, annular oil storage tank; 9, over oil 10. Oil inlet 1; 11. Oil inlet 2; 12. Fixed plate 1; 13. Fixed plate 2; 14a, Outer sealing lip; 14b, Inner sealing lip; ; 15, step groove; 16, sealing step ring; 17, fixing bolt; 18, dust cover.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figure 1, Figure 2, Figure 3, the high-precision rolling bearing includes a bearing body consisting of an outer ring 1, an inner ring 2, a number of steel balls 3 and a cage 4 for fixing the steel balls 3. The wall surface of the outer ring 1 is provided with There is an outer rolling groove 5 for the steel balls 3 to roll, and an inner rolling groove 6 for the steel balls 3 to roll on the wall surface of the inner ring 2. There are annular grooves on the same side end surface of the outer ring 1 and the inner ring 2. The two annular grooves A fixed ring frame 7 is arranged inside, and an annular oil storage groove 8 is opened on the fixed ring frame 7. Each annular oil storage groove 8 stores lubricating grease, and the inner wall of the fixed ring frame 7 is spaced with a number of annular oil storage grooves 8. The oil passages 9 whose ends are connected to each other are all inclined.

Preferably, the wall surface of the outer ring 1 is provided with oil inlet passages 1 10 that communicate with the corresponding oil passages 9 at positions corresponding to the steel balls 3 , and each oil inlet passage 1 10 is inclined and arranged. The central axis of the channel one 10 coincides with the central axis of the corresponding oil passage 9 .

Preferably, the wall surface of the inner ring 2 is provided with two oil inlet passages 11 that communicate with the corresponding oil passages 9 at positions corresponding to the steel balls 3 . The central axis of the second passage 11 coincides with the central axis of the corresponding oil passage 9 .

The bearing body generates a certain amount of heat under high-speed operation, and the lubricating grease is heated to form liquid lubricating oil, and under the action of centrifugal force, it follows the oil passage 9 and the corresponding oil inlet passage to the outer rolling groove 5 and the inner rolling groove in turn. 6, and lubricate the contact surface of the steel ball 3.

Preferably, the outer ring 1 is installed with a fixing plate 12 that hides the corresponding fixing ring frame 7 inside, and the inner ring 2 is installed with a fixing plate 2 13 that hides the corresponding fixing ring frame 7 inside.

Preferably, a sealing ring 1 is sealed between the fixing plate 1 12 and the outer ring 1 , and the sealing ring 1 is two, which are separately sealed and sleeved on the inner and outer peripheral walls of the corresponding fixing ring frame 7 .

Preferably, a second sealing ring is sealed between the second fixing plate 13 and the inner ring 2 .

In order to strengthen the sealing performance of the first sealing ring and the second sealing ring, the structure of the sealing ring 1 and the sealing ring 2 is improved uniformly. It is integrally formed, a pressing gap 14c is formed between the outer sealing ring and the inner sealing ring, the outer sealing ring is sealed against the end of the fixed ring frame 7, and the inner sealing ring is sealed against the peripheral wall of the fixed ring frame 7. The mounting plate compresses the sealing ring, thereby forcing the outer sealing lip 14a to shrink inwardly, and the compression gap 14c shrinks, so that the outer sealing lip 14a tightly abuts the end of the fixed ring frame 7, and the inner sealing lip 14b tightly abuts on the Fixed ring frame 7 peripheral walls.

In addition, in order to strengthen the sealing performance and prevent the leakage of lubricating grease, the outer sealing lip 14a of the sealing ring 1 has a convex lip 14d that protrudes outwardly in an arc shape, and the inner wall of the fixing plate 12 is provided with a sealing lip 14d for the sealing and clamping. The second sealing ring also has a raised lip 14d structure, and the second fixed plate 13 also has a stepped groove 15 for the raised lip 14d structure to be sealed and snapped into.

Preferably, the middle parts of the inner walls of the first fixing plate 12 and the second fixing plate 13 have a sealing step ring 16 which protrudes axially outward and extends into the corresponding annular oil storage groove 8 .

Preferably, the first fixing plate 12 and the second fixing plate 13 are fixedly connected to the outer ring 1 and the inner ring 2 respectively through fixing bolts 17 .

Preferably, an included angle is formed between the central axis of the oil passage 9 and the central axis of the longitudinal section of the annular oil storage tank 8 , and the included angle is an obtuse angle.

In order to prevent impurities from entering the working area inside the bearing body (the area where the steel balls 3 are driven), a dust cover 18 is also provided between the outer ring 1 and the inner ring 2 .

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but will not deviate from the spirit of the present invention or go beyond the appended claims the defined range.

Claims (8)

1. A high-precision rolling bearing comprises a bearing main body consisting of an outer ring (1), an inner ring (2), a plurality of steel balls (3) and a retainer (4) for fixing the steel balls (3), wherein an outer rolling groove (5) for rolling the steel balls (3) is formed in the wall surface of the outer ring (1), an inner rolling groove (6) for rolling the steel balls (3) is formed in the wall surface of the inner ring (2), the high-precision rolling bearing is characterized in that annular grooves are formed in the end surfaces of the outer ring (1) and the inner ring (2) at the same side, a fixed ring frame (7) is arranged in each annular groove, annular oil storage grooves (8) are formed in the fixed ring frame (7), lubricating grease is stored in each annular oil storage groove (8), a plurality of oil passing channels (9) communicated with the tail ends of the annular oil storage grooves (8) are formed in the inner wall of the fixed ring frame (7) at intervals, the oil passages (9) are all obliquely arranged;

the wall surface of the outer ring (1) is provided with a first oil inlet channel (10) communicated with the corresponding oil passing channel (9) at the position corresponding to each steel ball (3), each first oil inlet channel (10) is obliquely arranged, and the central axis of the first oil inlet channel (10) is coincided with the central axis of the corresponding oil passing channel (9);

and the positions, corresponding to the steel balls (3), on the wall surface of the inner ring (2) are provided with second oil inlet channels (11) communicated with the corresponding oil passing channels (9), each second oil inlet channel (11) is obliquely arranged, and the central axis of the second oil inlet channel (11) is coincided with the central axis of the corresponding oil passing channel (9).

2. A high precision rolling bearing according to claim 1, characterized in that the outer ring (1) is mounted with a first fixing plate (12) for hiding the corresponding fixing ring holder (7), and the inner ring (2) is mounted with a second fixing plate (13) for hiding the corresponding fixing ring holder (7);

a first sealing ring is hermetically connected between the first fixing plate (12) and the outer ring (1), and the first sealing ring is divided into two sealing rings which are hermetically sealed and connected on the inner and outer peripheral walls of the corresponding fixing ring frame (7);

and two sealing rings are hermetically connected between the second fixing plate (13) and the inner ring (2) and are hermetically sealed and connected on the inner and outer peripheral walls of the corresponding fixing ring frame (7) respectively.

3. A high precision rolling bearing according to claim 2 wherein the first and second seal rings are formed integrally by an outer seal lip (14 a) and an inner seal lip (14 b), a compression gap (14 c) is formed between the outer seal lip (14 a) and the inner seal lip (14 b), the outer seal lip (14 a) is sealed against the end of the stationary ring carrier (7), and the inner seal lip (14 b) is sealed against the peripheral wall of the stationary ring carrier (7).

4. A high-precision rolling bearing according to claim 2, wherein the outer sealing lip (14 a) of the first sealing ring is provided with an arc-shaped protruding lip (14 d) protruding outwards, and the inner wall of the first fixing plate (12) is provided with a stepped groove (15) for the protruding lip (14 d) to be clamped in a sealing manner.

5. A high precision rolling bearing according to claim 2, characterized in that the central part of the inner walls of the first fixed plate (12) and the second fixed plate (13) is provided with a sealing step ring (16) protruding axially outwards and extending into the corresponding annular oil storage groove (8).

6. A high precision rolling bearing according to claim 2 wherein the first fixed plate (12) and the second fixed plate (13) are fixedly connected to the outer ring (1) and the inner ring (2) respectively by fixing bolts (17).

7. A high precision rolling bearing according to claim 1 characterized in that an included angle is formed between the central axis of the oil passage (9) and the central axis of the longitudinal section of the annular oil storage groove (8), and the included angle is an obtuse angle.

8. A high precision rolling bearing according to claim 1, characterized in that a dust cap (18) is further provided between the outer ring (1) and the inner ring (2).

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