KR200257337Y1 - angular ball bearing of inner race separating type - Google Patents

Abstract

The present invention relates to an inner ring-separable angular ball bearing, wherein a plurality of bowls are interposed between the outer ring and the inner ring along the circumferential surface, and the inner ring and the inner ring are separated from the outer ring. A groove strip 40b formed along the outer edge of the groove, and one end of the groove strip being fitted to the groove strip, and the other end of the groove strip 40 is tightly attached to the inner surface of the outer ring. Since it is configured as described above, the simple structure can prevent the inflow of foreign substances between the bowls and at the same time prevent the separation of the inner ring, and the number of parts is reduced, thereby reducing the manufacturing cost of the bearing.

Description

Angular ball bearing of inner race separating type}

The present invention relates to an inner ring separation angular ball bearing.

Angular bowl bearings can support radial loads, thrust loads and composite loads, and they are widely used for high precision and high speed rotation because of their high load capacity.

A typical angular bowl bearing is shown in FIG. As shown, a plurality of bowls 6 are interposed between the outer ring 2 and the inner ring 4 along the circumferential surface, and retainers 8 are coupled to maintain the spacing of the plurality of bowls 6. It is. On the inner circumferential surface of the outer ring 2 and the outer circumferential surface of the inner ring 4, contact surfaces 2a and 4a for contacting the bowl are formed in a curved surface.

At this time, the line L connecting the contact surface 2a and the center of the contact surface 4a is inclined at a predetermined angle (called a “contact angle”). Therefore, due to the inclined contact, the radial load and the thrust load can be simultaneously received.

Protruding jaws 2b and 4b of predetermined heights h1 and h2 are formed at portions of the contact surfaces 2a and 4a where the bowl 6 is not caught so as not to separate the outer ring 2 and the inner ring 4. It is.

The general angular bowl bearing configured as described above is completed by thermally expanding the outer ring and assembling the inner ring through the bowl and the retainer.

On the other hand, bearings such as bearings for wheel bearing units of automobiles are double row angular bowl bearings, and these bearings are configured to separate the inner ring and the bowl in consideration of the design features and the economics of manufacturing. The reason why the inner ring is separated is because the angular bowl bearing is not easy to make a protruding jaw on the outer ring when the contact angle is large, and when the protruding jaw is made, the outer ring must be thermally expanded and assembled.

This conventional inner ring-separated double row angular ball bearing is shown in FIG. As shown in the drawing, two inner rings 10, 10 'are in close contact with each other, and the outer ring 14 is integrally formed on the outer circumferential surface of the inner ring by means of bowls 12, 12' arranged in two rows at predetermined intervals. ) Is a combined structure. Retainers 16 and 16 'are coupled between the inner races 10 and 10' and the outer race 14 so as to maintain the bowls 12 and 12 'at predetermined intervals.

Since the inner ring-separated double row angular bowl bearing has no protruding jaw formed on the outer ring, the inner ring and the bowl are separated from the outer ring during packing, moving, and installation.

In this way, the inner ring is separated from the assembly by thermal expansion, which is easy to assemble. However, since the inner ring is separated during packing, moving, and installation, the handling is not easy. Therefore, the inner ring is separated as shown in FIG. The protrusions 24a are in close contact with the outer circumferential surfaces of the inner rings 24, 24 'coupled with the bowls 20, 20' and the retainers 22, 22 'between the outer ring 18. A structure for forming a 24'a and inserting a separation prevention ring 26 in the protrusions 24a and 24'a to prevent the inner ring from being separated is disclosed.

In addition, conventionally, as shown in FIG. 3B, the recesses 28a and 28'a are formed in close contact with the inner circumferential surface of the inner ring 28 and 28 ', and the recesses 28a ( A structure for preventing the inner ring from being separated by inserting the separation preventing ring 30 in 28'a) is disclosed.

In addition, conventionally, as shown in FIG. 4, a structure is disclosed in which the insertion ring 34 is fitted to a portion of the inner circumferential surface of the inner ring 32, 32 'that is in close contact with the inner ring.

However, according to the inner ring-separable angular ball bearing which prevents the separation of the inner ring by combining the separation preventing ring and the insertion ring as described above, there is a problem that it is not only necessary to manufacture a separate part to prevent the separation of the inner ring, but also hassle of assembly. there was.

Therefore, the present invention is made to solve the above problems, the object of the present invention is to provide a simple structure to prevent the entry of foreign matter between the bowl and at the same time the inner ring separation type angular to prevent the separation of the inner ring To provide a ball bearing.

1 is a cross-sectional view showing a typical angular bowl bearing,

2 is a cross-sectional view showing a conventional inner ring-type angular bowl bearing;

Figure 3 A and B is a cross-sectional view showing the inner ring-separable angular ball bearing coupled to the conventional separation prevention ring,

Figure 4 is a cross-sectional view showing an inner ring separation type angular ball bearing coupled to the conventional insert ring;

Figure 5 is a cross-sectional view showing the inner ring separation angular ball bearing according to the present invention,

Figure 6 is a cross-sectional view showing a flanged inner ring separation angular ball bearing to which the present invention is applied.

<Description of the symbols for the main parts of the drawings>

40, 40 ': inner ring 40b, 40'b: groove

42, 42 ': Bowl 44: Paddle

46, 46 ': Retainer 48, 48': Seal member

48a, 48'a: wrinkle part

The inner ring-separable angular bowl bearing according to the present invention has a plurality of bowls interposed between the outer ring and the inner ring along a circumferential surface, and the inner ring and the bowl are separated from the outer ring. A groove belt is formed along the side edge, and one end is fitted to the groove belt, and the other end thereof is provided with a seal member that is tightly attached to the inner surface of the outer ring.

Preferably, the seal member is provided with a pleat portion so as to firmly adhere to the inner ring and the outer ring and to absorb the assembly tolerance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 5 is a cross-sectional view showing the inner ring-separated double row angular ball bearing to which the present invention is applied.

As shown, the two inner rings 40, 40 'are in close contact with each other, and the outer circumference of the inner ring is integrally formed through the bowls 42 and 42' arranged in two rows at predetermined intervals. ) Is combined. Retainers 46 and 46 'are coupled between the inner ring 40, 40' and the outer ring 44 to maintain the bowls 42 and 42 'at predetermined intervals.

On the inner circumferential surface of the outer ring 44 and the outer circumferential surface of the inner ring 40, 40 ', contact surfaces 44a, 44a', 40a, 40'a, which contact the bowl, are formed in a curved surface.

Grooves 40b and 40'b are formed in the inner ring 40 and 40 'along the outer edge thereof, one end of which is fitted into the grooves 40b and 40'b, and the other end thereof is Seal members 48 and 48 'are provided, which are tightly attached to the inner edge of the outer ring 44. As shown in FIG.

The seal members 48 and 48 'are made of a material such as steel sheet or plastic having elasticity, and at the same time as the middle portion or the outer ring side edge portion, the sealing members are firmly attached to the inner ring and the outer ring, and the assembling tolerance Wrinkles 48a and 48'a are formed to absorb them.

According to the angular bowl bearing according to the embodiment of the present invention configured as described above, the sealing member of the simple structure prevents the separation of the inner ring and prevents foreign substances from entering the bowl side, thereby increasing the reliability of the bearing and simplifying the handling. .

In addition, since the number of parts is reduced compared to the conventional inner ring separation preventing structure, manufacturing cost is reduced.

Inner ring-separated angular bowl bearing according to an embodiment of the present invention is a double row, but can also be applied to a single row angular ball bearing.

In addition, the present invention is an inner ring separation angular bowl bearing having an inner ring 50 with a flange 50a and a general inner ring 52, and / or an inner ring separating angular bowl bearing with a outer ring as shown in FIG. Applicable to

According to the inner ring-separated angular bowl bearing according to the present invention, a simple structure prevents the inflow of foreign substances between the bowls and at the same time prevents the separation of the inner ring and reduces the number of parts, thereby reducing the manufacturing cost of the bearing. Savings.

Claims (1)

In the inner ring-separable angular bowl bearing, a plurality of bowls are disposed between the outer ring and the inner ring along the circumferential surface, and the inner ring and the bowl are detachable from the outer ring. The groove belt is formed along the outer surface edge of the inner ring, and one end is fitted to the groove belt and the other end is provided with a seal member that is in close contact with the inner surface of the outer ring, The seal member has an inner ring-type angular bowl bearing, characterized in that the wrinkle member is formed so as to firmly adhere to the inner ring and the outer ring and absorb the assembly tolerance.