JPH0339621Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to an angular bearing that has been improved to improve assembly workability and significantly increase productivity.

[Prior art and its problems]

Bearings used in automobile axles are selected after considering factors such as the axle type and suspension system. In this case, for example, for the idle wheel axle or the drive wheel axle of an independent suspension system, a tapered roller bearing or a double row of single row angular ball bearings arranged opposite each other is used. The so-called unit-type double-row angular ball bearing is preferred because the outer ring of the angular contact ball bearing is integrated so that no preload adjustment is required. Here, the basic structure and assembly procedure of a single shield type angular ball bearing will be briefly described. As shown in Fig. 7, angular ball bearing 1
is an outer ring 2 having an outer raceway 2a, and an inner ring 3 having an inner raceway 3a facing the outer raceway 2a of the outer ring 2.
and a plurality of rolling elements 4 rotatably interposed between the outer raceway 2a and the inner raceway 3a. The bearing 1 is sealed at one end of its outer ring 2 or inner ring 3 to prevent lubricant leakage and foreign matter from entering from the outside. That is, an annular plate 5 having an inverted L-shaped cross section is attached to the counterbore 2b of the outer ring 2, and an annular elastic member 6 is attached to this annular plate 5, and these act together to open an annular seal 7. Configure.
Further, the annular elastic member 6 has a lip 6a at one end thereof, which extends inward in the radial direction while being inclined outward in the axial direction of the bearing 1 in cross section. Furthermore, the inner ring 3 is attached to the outer ring 2 at the shoulder portion 3b of the inner ring 3.
an annular sealing member 8 having a slope 8a that contacts the lip 6a so as to cover it when the lip 6a is fully inserted into the ring;
is installed. In addition, to assemble each of the above parts, first, the inner ring 3 loaded with the rolling elements 4 is fitted into the outer ring 2, and then,
The annular plate 5 on which the annular elastic member 6 is attached is fitted into the outer ring 2, and finally, with the lip 6a of the annular elastic member 6 turned up, the annular sealing member 8 is attached to the annular elastic member. 6 and inner ring 3
The inner surface of the lip 6a is attached to the slope 8a of the annular sealing member 8. By the way, in the above-mentioned angular contact ball bearing 1, the annular sealing member 8 is inserted into the annular sealing member 8 with the lip 6a, which is relatively small and formed into an annular shape, turned up. However, there was a problem in that the assembly work required a high degree of skill, which was disadvantageous in terms of productivity. Furthermore, if the above-mentioned sealing structure is applied to, for example, a unitized double-row angular ball bearing that is assembled to an independent suspension type drive axle, reassembly after disassembly is impossible. It's inconvenient. That is, in the assembled state, the ball bearing has its integral outer ring fitted into the bearing seat of the axle housing, and its pair of inner rings fitted externally into the bearing seats of the shaft portion of the hub screwed to the axle. However, since the inner ring located on the shoulder side of the hub is crimped to the shoulder by the tightening force of the hub when assembled, it is necessary to loosen the screws on the hub and remove it from the axle. Sometimes the inner ring is fitted into the hub. In this case, in the above sealing structure, the annular sealing member is press-fitted with the lip of the annular elastic member turned up; When refitting the inner ring into the outer ring, it is necessary to flip up the lip of the annular elastic member disposed on the outer ring within the axle housing, which makes the task difficult. Therefore, there is a need to be able to assemble the bearing without any problems even after it has been disassembled. This invention was devised under the above circumstances, and its objective is to provide an angular bearing that can improve assembly workability and significantly increase productivity.

[Means to solve the problem]

In order to solve the above problems, this invention adopts the following technical means. That is, the angular bearing according to this invention has an outer ring having a counterbore extending on one side of the outer raceway, an inner ring having a shoulder on one side of the inner raceway facing the counterbore, and the outer race. and a plurality of rolling elements that are rotatably interposed between the outer raceway of the inner ring and the inner raceway of the inner ring, the counterbore having a radial shape inclined outward in the axial direction of the bearing in cross section. An annular seal having a lip extending inwardly is attached to the shoulder, and an inner slope that lifts the lip in the process of being inserted between the inner ring and the outer ring, and an annular seal that is completely inserted between the inner ring and the outer ring. The present invention is characterized in that an annular sealing member having an outer slope in contact with which the lip overlaps is attached.

[Action and effect]

First, an annular seal having a lip extending inward in the radial direction while slanting outward in the axial direction of the bearing in cross section is attached to the counterbore of the outer ring of the pre-assembled bearing, and between the annular seal and the inner ring. Press fit the annular sealing member. At this time, since an annular sealing member having an inner slope that lifts the lip when inserted between the inner ring and the outer ring is attached to the shoulder of the inner ring, the annular sealing member is fitted. As a result, the above-mentioned lip will be automatically turned up. Moreover, since the annular sealing member also includes an outer slope that contacts the lip so as to cover it when it is completely inserted between the inner ring and the outer ring, the lip that is turned up can be It is supported by the outer slope and exhibits a sealing function in cooperation with the outer slope. As described above, according to this invention, the lip of the annular seal is automatically flipped up simply by inserting the annular sealing member between the outer ring and the inner ring. Therefore, for example, when reassembling the inner ring that has been pulled out from the outer ring inside the housing and fitted onto the shaft portion as described above to the outer ring, the annular sealing member must be fitted into the inner ring. While wearing the
All that is required is to fit the inner ring into the outer ring. Therefore, the assembly work is easier than that of the conventional example. Therefore, productivity is greatly improved and manufacturing costs are advantageous.

[Explanation of Examples]

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings. First, a first embodiment will be described in detail with reference to FIGS. 1 to 5. As shown in FIG. 1, an angular ball bearing 11
is a counterbore 1 extending on one side of the outer raceway 12
3, an inner ring 17 having a shoulder 16 on one side of the inner raceway 15 and facing the counterbore 13, and a rolling ring between the outer raceway 12 of the outer race 14 and the inner raceway 15 of the inner race 17. A plurality of rolling elements 18 are movably interposed. Then, in the counterbore 13, the cross section is inverted L.
A letter-shaped annular plate 19 is attached to which an annular elastic member 20 is mounted, which together constitute an annular seal 21 . In this case, the annular elastic member 20 is created by molding rubber into a ring shape. Also,
The annular elastic member 20 has a lip 22 at one end thereof, which extends inward in the radial direction while being inclined outward in the axial direction of the bearing 11 in cross section. moreover,
An annular sealing member 23 is provided on the shoulder portion 16 of the inner ring 17.
is installed. This annular sealing member 23 has an inner slope 2 that lifts up the lip 22 in the process of being inserted between the inner ring 17 and the outer ring 14.
4, and an outer slope 25 with which the lip 22 comes into contact so as to overlap when the inner ring 17 and the outer ring 14 are fully inserted. On the other hand, the inner end 20a of the annular elastic member 20
constitutes a first sealing portion 26 that cooperates with the inner end 19a of the annular plate 19 and the inner end 23a of the annular sealing member 23 to seal one end of the inner ring 17 to the outer ring 14. . Further, the lip 22 is connected to an outer slope 25 of the annular sealing member 23.
A second seal portion 27 is formed outside the first seal portion 26 in cooperation with the second seal portion 27 . The operation of the above configuration will be specifically explained with reference to FIGS. 1 to 4. First, the annular plate 19 to which the annular elastic member 20 is mounted, that is, the annular seal 21, is attached to the counterbore 13 of the outer ring 14 of the bearing 11, which has been assembled in advance. Then, as shown in FIG. 2, an annular sealing member 23 is press-fitted between the annular elastic member 20 and the inner ring 17. At this time, the annular sealing member 23
As shown in FIG. 3, the inner slope 24 lifts up the lip 2.
2 will come into contact with the lower surface 22a of 2. Then, the annular sealing member 23 enters while lifting the lip 22 with its inner slope 24. Thus, as shown in FIG. 4, the lip 22 is automatically flipped up by press-fitting the annular sealing member 23. On the other hand, the lip 22, once turned up by the inner slope 24, tries to restore itself due to its elasticity. At this time, the annular sealing member 23 is also provided with an outer slope 25 that comes into contact with the lip 22 so as to cover it when it is completely inserted between the inner ring 17 and the outer ring 14. As shown in the figure, the lip 22 is automatically supported by the outer slope 25. Further, when the annular sealing member 23 is extracted, the outer slope 25 lifts the lip 22, so that the extraction operation can be carried out smoothly, which is convenient. Therefore, not only can the assembly work be accomplished without requiring a high level of skill as in the conventional example, but it also becomes easier to disassemble. Furthermore, as shown in Fig. 5, when this invention is applied to a so-called unitized double-row outward angular ball bearing used, for example, in an independently suspended drive axle, the above-mentioned result can be obtained. Since the lip 22 can be automatically flipped up by fitting the annular sealing member 23, the hub 28 can be taken out from the axle 29 and then fitted onto the shaft portion 30 of the hub 28. When reassembling the inner ring 17 that has been placed on the outer ring 14, there is no need to turn over the lip 22 of the annular seal 21 attached to the outer ring 14 inside the axle housing 31, as in the conventional example, making reassembly easier. can be done. Note that, as in the second embodiment shown in FIG. 6, the bearing 11 described above has an annular groove 32 formed in the shoulder portion 16 of the inner ring 14 in the above embodiment, and the annular groove 32 has a block cross section. An annular sealing member 23 having an inner slope 24 and an outer slope 25 is fitted into the annular seal 22.
In addition to the above-mentioned annular sealing member 23, the above-mentioned inner ring 1
A second lip 33 may be formed so as to cover and contact the inner slope 24 of the annular sealing member 23 when it is completely inserted between the annular sealing member 23 and the outer ring 14. By doing so, the second lip 33 and the inner slope 24 will work together to exhibit a sealing function, and the sealing performance will be even better than that in the first embodiment. Of course, the scope of this invention is not limited to the above embodiments. For example, the form of the lip 22 in the above embodiment is not particularly limited to the illustrated example, but is set depending on the form of the annular sealing member 23. Further, the inclination angles of the inner slope 24 and the outer slope 25 are set according to the form of the lip 22.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the first embodiment of this invention.
Figures 2 to 4 are explanatory diagrams of its operation, Figure 5 is an explanatory diagram of its operation when this invention is applied to a unitized double-row angular ball bearing, and Figure 6 is a second embodiment of this invention. FIG. 7 is an explanatory diagram of a conventional example. 11...Anguilla type bearing, 12...Outer raceway,
13...Counterbore, 14...Outer ring, 15...
Inner raceway, 16...shoulder, 17...inner ring, 18...
rolling element, 20... annular seal, 22... lip,
23... Annular sealing member, 24... Inner slope, 25...
...outer slope.

Claims (1)

[Claims for Utility Model Registration] An outer ring having a counterbore extending on one side of the outer raceway, an inner ring having a shoulder on one side of the inner raceway facing the counterbore, and an outer raceway of the outer race. and a plurality of rolling elements that are rotatably interposed between the inner raceway of the inner ring, and the counterbore is provided with a plurality of rolling elements arranged in a radial direction while being inclined outward in the axial direction of the bearing in cross section. An annular seal having an inwardly extending lip is attached to the shoulder, and an inner slope that lifts the lip during insertion between the inner and outer rings, and when the seal is fully inserted between the inner and outer rings. An angular shape bearing characterized in that an annular sealing member having an outer slope in contact with which the lip overlaps is attached.