JP2017141852A - Bearing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rotation of an outer race, with a simple constitution without providing an additional member.SOLUTION: Engagement portions are formed respectively in outer races (11, 21) of at least two bearings (10, 20) disposed in adjacent to each other, in such a way that the engagement portions engage with other. For example, a flange, that is, a projecting portion (11a) is formed in one outer race (11), and a recessed portion (21b) engaged with the flange, that is, the projecting portion (11a) is formed in the other outer race (21). Or the flanges are formed in the outer races of the bearings, recessed portions are formed by cutting out a part of the flanges, and one of the flanges is partially engaged with the recessed portion of the other between the adjacent bearings. By engaging the outer races between the adjacent bearings with each other, the outer race can be prevented from rotating together with a rotating shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bearing structure for preventing rotation of an outer race of at least one bearing with a simple configuration in a structure in which two or more bearings are arranged adjacent to each other in parallel, and is applied to, for example, a transmission of an automobile. It is.

  Generally, a bearing is composed of an outer race, an inner race, and a plurality of rolling members (for example, balls) disposed between the outer race, an inner race, and press-fitted into the bearing housing, and the outer periphery of the outer race is fixed in close contact with the bearing housing. The rotating shaft is fixed to the inner race. Thus, the outer race is fixed to the bearing housing, while the inner race is configured to rotate integrally with the rotation shaft. For example, in a transmission of an automobile, a large number of bearings are provided, and a bearing housing is provided on the case side of the transmission. The material of the bearing is made of a highly rigid metal such as iron, but the bearing housing on the case side of the transmission is made of a light metal such as aluminum. In such a case, due to the difference in the coefficient of thermal expansion between the bearing and the bearing housing, there is a gap between the outer race and the bearing housing at high temperatures. As a result, the outer race rotates with the inner race and wears out. Wear is caused on the inner peripheral side of the bearing housing having low performance, and the arrangement of the bearings becomes unstable. In Patent Document 1 below, in order to prevent such an inconvenience, a device for firmly fixing the outer race to the bearing housing is shown in order to prevent the outer race from rotating around the inner race. Yes. That is, by providing a locking portion (for example, a groove) on the outer periphery of the outer race, and also providing a locking portion (for example, a groove) on the inner periphery of the bearing housing, and interposing a synthetic resin member between the both locking portions, The outer race is firmly fixed to the bearing housing.

  On the other hand, in Patent Document 2 below, in order to prevent the speedometer sleeve of an automobile from rotating with the rotation of the pinion, a locking groove is provided on a part of the outer periphery of the sleeve, and the locking groove is engaged with the locking groove. It is shown that the lock plate is fixedly provided so as to match.

No. 58-12669 microfilm (No. 59-118823) Japanese Utility Model Publication No. 6-54912

  In patent document 1, since it is the structure which adds a synthetic resin member, there exists a problem that the number of parts increases, and it is necessary to fully consider the selection of the raw material of a synthetic resin member to be used, strength durability, etc. Yes, it takes time and effort, and the overall cost is high. Also in Patent Document 2, the lock plate is not an original component of the speedometer, but is a member additionally provided to prevent accompanying rotation, so that there is a problem that the number of parts increases and costs increase. .

  The present invention has been made in view of the above points, and an object of the present invention is to provide a bearing structure that prevents rotation of the outer race with a simple configuration without providing an additional member.

  A bearing structure according to the present invention includes at least two bearings arranged adjacent to each other, and each outer race of the at least two bearings is formed to have an engaging portion so as to engage with each other. It is characterized by being.

  According to this, since the engaging portion is formed in the outer race itself of the bearing and engages with each other via the engaging portion of the outer race, the outer race of one bearing tries to rotate with the rotation of the shaft. When the other bearing is engaged with the outer race, the former outer race can be prevented from being rotated. According to the present invention, in order to prevent such rotation of the outer race, it is only necessary to form the engaging portion in the outer race itself, and it is not necessary to provide other additional members, so the number of parts is increased. Without rotation, rotation of the outer race can be prevented with a simple configuration.

  In one embodiment, three or more bearings are provided, and the outer races of one bearing have two or more engaging portions so as to engage with the outer races of other two or more bearings. It may be formed. As a result, three or more bearings are sequentially and sequentially engaged via the engaging portions of the respective outer races so that the locking performance can be improved and the rotation of the outer races can be more reliably prevented. Become. If the outer races of a plurality of adjacent bearings are chain-engaged in a ring shape through the engaging portions, a complete locked state is realized, and the outer race is prevented from rotating more reliably. be able to.

The front view which shows one Example of the bearing structure which concerns on this invention, and an internal abbreviation side sectional view. The front view which shows another Example of the bearing structure which concerns on this invention, and an internal abbreviation side sectional view. The front view which shows other Example of the bearing structure which concerns on this invention, and an internal abbreviation side sectional view. The front view which shows another Example of the bearing structure which concerns on this invention. The front view which shows the modification of FIG.

  FIG. 1 shows an embodiment of a bearing structure according to the present invention, where (a) is a front view of two bearings 10 and 20 disposed adjacent to each other in a bearing housing 1, and (b) is b in (a). FIG. The basic structure of the bearings 10 and 20 may be the same as a conventionally known bearing. The bearing 10 includes an outer race 11, an inner race 12, and a plurality of balls 13 disposed therebetween. The bearing 20 is an outer race. The rotary shafts 2 and 3, which are constituted by a race 21, an inner race 22, and a plurality of balls 23 arranged therebetween, are arranged parallel to each other, and are rotatably supported by the bearings 10 and 20. According to the present embodiment, the structures of the outer races 11 and 21 of the bearings 10 and 20 are different from those conventionally known. The embodiment of FIG. 1 is intended to prevent rotation of the outer race 21 of one bearing 20, and is not intended to prevent rotation of the outer race 11 of the other bearing 10.

  The outer race 11 of the bearing (first bearing) 10 has a flange 11a formed at one end face thereof. That is, the flange 11a is formed as a protruding portion that protrudes in the radial direction from the original outer peripheral edge of the outer race 11 (indicated by a dotted line in FIG. 1A) over the entire circumference of one end of the outer race 11. The flange 11 a of the outer race 11 of the bearing 10 extends to a position where the flange 11 a interferes with a part of the outer race 21 of the adjacent bearing (second bearing) 20. Then, in the outer race 21 of the adjacent bearing 20, a recess 21 b is formed at a portion that is interfered by the flange 11 a of the outer race 11 of the bearing 10 so as to come into contact with and engage with the flange 11 a. . The recess 21b has a curved shape that fits into the arcuate contour of the flange 11a. The flanges 11a and the recesses 21b of the adjacent outer races 11 and 21 function as engaging portions that engage with each other. Accordingly, when a gap is formed between the bearing housing 1 and the outer race 21 of the bearing (second bearing) 20, when the outer race 21 tries to rotate as the inner race 22 rotates, the recess 21 b is adjacent. By engaging with the flange 11a of the outer race 11 of the bearing (first bearing) 10, the accompanying rotation of the outer race 21 is suppressed.

  FIG. 2 shows another embodiment of the bearing structure according to the present invention, (a) is a front view of two bearings 30 and 40 arranged adjacent to each other in the bearing housing 1, and (b) is a diagram in (a). It is an internal abbreviation sectional view which meets a bb line. As described above, the basic structure of the bearings 30 and 40 may be the same as a conventionally known bearing, and the bearing 30 includes an outer race 31, an inner race 32, and a plurality of balls 33 arranged therebetween. The bearing 40 includes an outer race 41, an inner race 42, and a plurality of balls 43 arranged therebetween. According to the present embodiment, the structures of the outer races 31 and 41 of the bearings 30 and 40 are different from those conventionally known. The embodiment of FIG. 2 is intended to prevent the rotation of both outer races 31, 41 of two bearings 30, 40 arranged adjacent to each other.

  In FIG. 2, flanges 31a (first protrusions) and 41a (second protrusions) are formed in the outer races 31 and 41 of both bearings 30 and 40, respectively, and a part of the flanges 31a and 41a. Concave portions 31b and 41b are respectively formed in the upper surface. That is, a part of both flanges 31a and 41a extends to a position where they interfere with each other, and the respective interference portions are cut out as recesses 31b and 41b (for example, cut out linearly), The recesses 31b and 41b of the flanges 31a and 41a are brought into contact with each other so that they are engaged with each other to prevent mutual rotation. That is, the concave portions 31b and 41b of the flanges 31a and 41a function as engaging portions that engage with each other. As a result, when a gap is formed between the bearing housing 1 and the outer races 31 and 41 of any one of the bearings 30 and 40, when the outer races 31 and 41 are about to rotate as the inner races 32 and 42 rotate, both Since the flanges 31a and 41a are engaged by the contact between the recesses 31b and 41b, the rotation of the outer races 31 and 41 is suppressed.

  FIG. 3 shows still another embodiment of the bearing structure according to the present invention, in which (a) is a front view of two bearings 50 and 60 arranged adjacent to each other in the bearing housing 1, and (b) is in (a). It is an internal omission cross-sectional view along line bb. As described above, the basic structure of the bearings 50 and 60 may be the same as a conventionally known bearing, and the bearing 50 includes an outer race 51, an inner race 52, and a plurality of balls 53 disposed therebetween. The bearing 60 includes an outer race 61, an inner race 62, and a plurality of balls 63 arranged therebetween. According to the present embodiment, the structures of the outer races 51 and 61 of the bearings 50 and 60 are different from those conventionally known. The embodiment of FIG. 3 is intended to prevent rotation of the outer races 51, 61 of both bearings 50, 60 arranged adjacent to each other.

  In FIG. 3, the flange 51a is formed in the outer race 51 of one bearing 50, and the recessed part 51b is formed in a part of this flange 51a. In addition, a protruding portion 61 a that protrudes in the radial direction is partially formed in the outer race 61 of the other bearing 60. Each of the protrusions 61a is formed in an appropriate shape so as to fit into the recess 51b. That is, the protrusion 61a of the outer race 61 of the bearing 60 extends to a position where it interferes with the flange 51a of the outer race 51 of the bearing 50. The recess 51b is notched in the flange 51a at the interference portion. By engaging with the recess 51b, mutual rotation is suppressed. That is, these protrusions 61a and recesses 51b function as engaging portions that engage with each other. As a result, when a gap is formed between the bearing housing 1 and the outer races 51 and 61 of any one of the bearings 50 and 60, both the outer races 51 and 61 are rotated when the inner races 52 and 62 rotate. By fitting the protrusion 61a and the recess 51b, the rotation of the outer races 51 and 61 is suppressed.

  4 and 5 show an embodiment of a bearing structure according to the present invention, which is applied in a mechanism including three or more rotating shafts arranged adjacent to each other in parallel, such as a transmission of an automobile, for example. It is a front view and shows an example in which four rotating shafts 4, 5, 6, and 7 are arranged adjacent to each other as an example. In FIG. 4, bearings 70, 80, 90, 100 that rotatably support the respective rotating shafts 4, 5, 6, 7 are outer races 71, 81, 91, 101 and inner races 72, 82, 92, 102 and a plurality of balls 73, 83, 93, 103 disposed between them, according to the present invention (similar to the flange 11a in FIG. 1), over the entire circumference of one end of each outer race. Flange 71a, 81a, 91a, 101a is formed, respectively. That is, each flange 71a, 81a, 91a, 101a is formed as a protruding portion that protrudes in the radial direction from the original outer peripheral edge of each corresponding outer race 71, 81, 91, 101. The outer race flange 71a, 81a, 91a, 101a of each bearing 70, 80, 90, 100 (first bearing) is the outer race flange of the adjacent bearing 70, 80, 90, 100 (second bearing). Extending to a position that interferes with a portion of the outer race and / or a portion of the outer race. And, in a part of the flange of the outer race of the adjacent bearing (second bearing) and / or a part of the outer race, a portion interfered by the flange of the outer race of the bearing (first bearing) Recesses 71b, 81b, 91b, and 101b are formed so as to contact and engage the flange, respectively. These recesses 71b, 81b, 91b, and 101b have curved shapes that fit into the arcuate contours of the corresponding flanges 71a, 81a, 91a, and 101a.

  That is, a recess 81 b is formed in a part of the flange 81 a of the outer race 81 of the bearing 80 so as to engage with the flange 71 a of the outer race 71 of the bearing 70, and engage with the flange 81 a of the outer race 81 of the bearing 80. A recess 91b is formed in a part of the outer race 91 of the bearing 90 and a part of the flange 91a, and a part of the flange 101a of the outer race 101 of the bearing 100 is engaged with the flange 91a of the outer race 91 of the bearing 90. A recess 101 b is formed in a part of the flange 71 a of the outer race 71 of the bearing 70 so as to engage with the flange 101 a of the outer race 101 of the bearing 100. In this case, whether or not the recess 91b is formed not only on the flange 91a but also on the outer race 91 as in the bearing 90 is determined by design according to the degree of proximity between the adjacent bearings 80 and 90. As shown in FIG. 4, the outer races 71, 81, 91, 101 of a plurality of adjacent bearings 70, 80, 90, 100 are engaged portions (flanges 71a, 81a, 91a, 101a and recesses 71b, 81b, 91b, By adopting a configuration in which the ring-like chain is engaged via 101b), a complete locked state is realized, and the rotation of all the outer races 71, 81, 91, 101 can be more reliably prevented.

  In the embodiment of FIG. 4, the bearing housing 1 is formed by providing holes for installing the bearings on one surface of the transmission case. In this case, the size of the bearing installation hole for the housing 1 may be a size corresponding to the outer diameter of the stationary portion of the outer races 71, 81, 91, 101 as in the conventional case. The flanges 71 a, 81 a, 91 a, 101 a of the outer races 71, 81, 91, 101 are larger in diameter than the outer diameter of the stationary part of the outer race, but the flanges 71 a, 81 a, 91 a, 101 a are Since the flanges 71a, 81a, 91a, 101a are protruded from the mounting holes of the bearing housing 1, the bearings 1 are formed at the ends of the shafts 81, 91, 101. Can be placed in. Therefore, there is no need to change the structure of the installation hole of the bearing housing 1 with the adoption of the bearing structure according to the present invention, which is convenient. However, the present invention is not limited to this, and the structure of the hole may be changed so that the flanges 71 a, 81 a, 91 a, 101 a can be accommodated in the installation hole of the bearing housing 1.

  FIG. 5 is a modification of FIG. 4, and the flanges (protrusions) of the outer races 71, 81, 91, 101 of the bearings 70, 80, 90, 100 are provided in a necessary portion without providing the entire circumference. Is. That is, in each of the bearings 70, 80, partial flanges 71a1, 71a2, 81a1, 81a2 are respectively formed at two predetermined positions on the outer races 71, 81, and one of the partial flanges 71a2, 81a2 is formed. Recesses 71b and 81b are respectively formed in the. In the bearing 90, a partial flange 91a1 is formed at a predetermined position on the outer race 91, and a recess 91b is formed at another predetermined position of the outer race 91. Further, in the bearing 100, a partial flange 101a1 is formed at a predetermined position on the outer race 101, and a recess 101b is formed in a part thereof. And between the bearings 70 and 80, the partial flange 71a1 and the recessed part 81b are engaged, between the bearings 80 and 90, the partial flange 81a1 and the recessed part 91b are engaged, and between the bearings 90 and 100, The partial flange 91a1 and the concave portion 101b are engaged with each other, and the partial flange 101a1 and the concave portion 71b are engaged between the bearings 100 and 70. Also in the case of FIG. 5, the outer races 71, 81, 91, 101 of a plurality of adjacent bearings 70, 80, 90, 100 are configured to be chain-engaged in a ring shape through their engaging portions, thereby completely Therefore, the rotation of all the outer races 71, 81, 91, 101 can be more reliably prevented.

  According to the configuration as shown in FIG. 5, the flanges (protrusions) of the outer races 71, 81, 91, 101 of the bearings 70, 80, 90, 100 are provided in a necessary part without providing the entire circumference. The presence of the flange (protruding portion) can be prevented from interfering with other parts provided on one surface of the transmission case constituting the bearing housing 1.

  In addition, the structure of the engaging part formed in the outer race of the bearing is not limited to those shown in the above embodiments, and may be variously modified.

1 Bearing housing 2, 3, 4, 5, 6, 7 Rotating shaft 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 Bearing 11, 21, 31, 41, 51, 61, 71, 81, 91, 101 Outer race 12, 22, 32, 42, 52, 62, 72, 82, 92, 102 Inner race 13, 23, 33, 43, 53, 63, 73, 83, 93, 103 Ball (rolling Element)
11a, 21a, 31a, 41a, 51a, 71a, 81a, 91a, 101a Flange (protrusion)
61a Protrusion 11b, 21b, 31b, 41b, 51b, 61b, 71b, 81b, 91b, 101b

Claims (6)

A structure comprising at least two bearings arranged adjacent to each other;
Each of the outer races of the at least two bearings is formed so as to have an engaging portion so as to engage with each other.   Three or more bearings are provided, and the outer race of one bearing is formed to have two or more engaging portions so as to engage with the outer races of the other two or more bearings. The bearing structure according to claim 1.   Of the at least two bearings, the outer race of the first bearing includes a projecting portion projecting in the radial direction as the engaging portion, and the outer race of the second bearing adjacent to the first bearing. The bearing structure according to claim 1, wherein the engaging portion includes a concave portion that engages with the protruding portion.   The bearing structure according to claim 3, wherein the protruding portion is a flange.   The bearing structure according to claim 3 or 4, wherein the second bearing includes a protrusion, and the recess is formed by cutting out a part of the protrusion of the second bearing.   The bearing structure according to claim 1, wherein the engagement portion is formed at one end of the outer race.

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