JPH0893779A - Bearing sleeve device - Google Patents

Abstract

PURPOSE: To provide a lightweight bearing sleeve device by which a bearing sleeve is not abraded by outer laces of taper bearings and on which the taper bearings can be easily installed. CONSTITUTION: In a bearing sleeve device which supports a pair of taper bearings 5 and 6 arranged at intervals in the shaft direction on the inner periphery and is composed of aluminum or the like, a cross-sectional almost trapezoidal annular taper groove 3A is arranged on an inner peripheral surface of a bearing sleeve 3 between a pair of taper bearings 5 and 6. A tapering member 4 which has on the outer periphery taper surfaces 4B and 4D fitted for the annular taper groove 3A and has a split part 11 whose circumferential part is notched and is composed of steel or the like, is arranged by being brought into pressure contact in the annular taper groove 3A by elastic restoring force of the tapering member 4 itself, and thrust surfaces 4E and 4C of the tapering member 4 are constituted so as to support thrust surfaces 7A and 8A where respective outer laces in a pair of taper bearings 5 and 6 are opposed to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight casing, particularly a bearing sleeve device, made of aluminum or the like, which receives a thrust force by a tapered bearing or the like which is axially supported inside.

[0002]

2. Description of the Related Art In recent years, in order to reduce the weight of vehicles, lightweight casings made of aluminum or the like have been adopted in the power transmission section. For example, there is a transfer described in JP-A-4-38225 and JP-A-4-7763. An example of the transfer described in Japanese Utility Model Laid-Open No. 4-7763 will be described with reference to FIG.
Is transmitted to the pinion gear 29 that meshes with the ring gear 28 in a bevel tooth configuration. The driven shaft 1 having a pinion gear 29 at its end receives a thrust force in the axial direction due to the bevel teeth meshing with the ring gear 28. Therefore, the driven shaft 1 has a pair of inner and outer tapered bearings 5,
When the outer races 7 and 8 of the inner and outer taper bearings are axially supported by the casing 6, the opposing thrust surfaces of the outer races 7 and 8 are locked to the annular step portion 24 projecting from the inner periphery of the casing 2. Thus, the casing 2 bears the thrust force. Note that 9, 10
Indicates an inner race of a tapered bearing, and 16 indicates a joint member.

As described above, in the structure shown in FIG. 6, the tapered bearing is directly supported by the casing, while in FIG.
There is also the one shown in. In this example, the bearing member is unitized so that the assembling performance is extremely excellent. A bearing sleeve 3 also made of aluminum or the like is inserted and fitted in a lightweight casing 2 made of aluminum or the like and appropriately fixed by bolts or the like, and both sides of an annular step portion 24 projectingly provided on the inner circumference of the bearing sleeve 3 are provided. Thrust surface 24C, 2
The thrust surfaces of the outer races 7 and 8 facing each other of the pair of taper bearings 5 and 6 are locked to 4D.

However, since the casing and the bearing sleeve are made of a lightweight metal such as aluminum for the purpose of weight reduction, the outer race and the inner race should be combined with the tapered race due to lack of lubricating oil or assembly error. When a rotating creep phenomenon is caused, relative rotation occurs between the casing and the bearing sleeve and the outer race, and in particular, the driven shaft may be subject to an axial thrust force. The outer race easily wears the thrust surface of the annular step portion of the casing and the bearing sleeve. as a result,
The driven shaft causes play in the axial direction, which may adversely affect tooth contact when the bevel teeth are meshed with the ring gear of the front differential. To that end, FIG.
As shown in, outer races 7, 8 and bearing sleeve 3
It has also been proposed to interpose steel metals 25 and 26 having excellent wear resistance between the inner circumference of and the annular step portion 24.

[0005]

However, in the conventional example as described above, steel metal is prepared for each of the inner and outer tapered bearings, and the steel metal is provided between the inner peripheral surface of the bearing sleeve and the outer race of the tapered bearing. Not only must it be installed in just the right amount of time, it is not only time-consuming to manage its dimensions, but it can also cause relative rotation between the steel metal and the bearing sleeve, which causes axial wear of the annular step. The possibility of was still left. The present invention solves the conventional problems as described above, and the bearing sleeve is worn by the outer race of the tapered bearing without disposing another member such as steel metal between the bearing sleeve and the tapered bearing. The present invention provides a lightweight bearing sleeve device which is easy to assemble and has a tapered bearing.

[0006]

As a means for solving the problems of the above-mentioned conventional bearing sleeve device, the present invention provides a pair of taper bearings installed at intervals in the axial direction. In the bearing sleeve device made of aluminum or the like that is supported on the inner circumference, an annular taper groove having a substantially trapezoidal cross section is provided on the inner peripheral surface of the bearing sleeve between the pair of tapered bearings, and a taper surface suitable for the annular taper groove is provided. A taper ring member made of steel or the like having an outer peripheral portion and a cutout part of which is cut out on the circumference is installed by being pressed into the annular taper groove by the elastic restoring force of the taper ring member itself. Is configured so that the thrust surfaces of the tapered ring members support the opposing thrust surfaces of the outer races of the pair of tapered bearings. Was that characterized in, it is an unit for which a problem solution. Further, in the present invention, knurls or the like may be formed on the bottom of the annular tapered groove of the bearing sleeve and the outer peripheral surface of the tapered ring member so as to prevent mutual movement in the circumferential direction. In order to reduce the weight, an inner circumferential groove may be formed on the inner circumference of the tapered ring member. Further, in the present invention, in order to effectively suppress the creep phenomenon, the thrust surface of the tapered ring member that supports the thrust surface of each outer race in the pair of tapered bearings is the thrust surface of each outer race that faces each other. May be formed to be inclined so as to be pressed in the axial direction. Furthermore,
In the present invention, in order to securely install the taper ring member on the bearing sleeve, a spring may be arranged between the facing surfaces of the split portion of the taper ring member.

[0007]

The present invention relates to a bearing sleeve device made of aluminum or the like for supporting a pair of tapered bearings 5 and 6 installed at intervals in the axial direction on the inner circumference, and a bearing between the pair of tapered bearings 5 and 6. An annular taper groove 3A having a substantially trapezoidal cross section is provided on the inner peripheral surface of the sleeve 3, and a split portion 11 is formed by cutting out a part of the circumference with a tapered surface conforming to the annular taper groove 3A. By installing the taper ring member 4 made of steel or the like in the annular taper groove 3A with the elastic restoring force of the taper ring member 4 in pressure contact, the thrust surfaces 4C, 4E of the taper ring member 4 can be made to form the pair of Since the thrust bearings 7A and 8A of the outer races 7 and 8 of the tapered bearings 5 and 6 of FIG. While using a light metal such as, the diameter of the tapering ring member 4 made of steel or the like, which is excellent in wear resistance, is reduced by a tool or the like using the split portion 11 to form an annular taper groove on the inner peripheral surface of the bearing sleeve 3. If the taper bearing 5 or 6 is installed and fixed to 3A, the outer race 7 may be damaged due to lack of lubricating oil or assembly error.
Alternatively, even if the 8 causes a creep phenomenon that rotates with the inner race and relative rotation occurs between the taper ring member 4 and the outer race 7 or 8, the thrust surfaces of both are hardly worn and the front differential There is no adverse effect on tooth contact when the bevel teeth are meshed with the ring gear. Further, until the tapered ring member 4 is installed, there is no reduced diameter portion on the inner circumference of the bearing sleeve 3, so that the degree of freedom in the assembling order of the inner and outer tapered bearings 5 and 6 is increased, and the assembling property is improved. Will be done.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the bearing sleeve device of the present invention. FIG. 1 (A) is a sectional view of a main part in which the bearing sleeve device of the present embodiment is attached to a rotary shaft bearing portion, and FIG. )
FIG. 6 is a perspective view of a taper ring member. A pair of tapered bearings 5 and 6 arranged at intervals in the axial direction to axially support the driven shaft 1 are supported on the inner circumference of a bearing sleeve 3 made of aluminum or the like. In the illustrated example, the tapered bearings 5 and 6 are composed of a pair of large and small having different diameters. Therefore, the inner peripheral seat 3E of the bearing sleeve 3 that supports the outer races 7 and 8 of the tapered bearings 5 and 6, Although the diameter of 3F is different, it goes without saying that these can be used for the same diameter. The inner peripheral surface of the bearing sleeve 3 between the pair of tapered bearings 5 and 6 is provided with an annular tapered groove 3A having a substantially trapezoidal cross section, which is composed of a groove bottom 3B, an outer tapered surface 3C, and an inner tapered surface 3D. The annular taper groove 3A as shown in B).
A taper ring member 4 made of steel or the like having a tapered surface (outer taper surface 4B, inner taper surface 4D and outer peripheral surface 4A) that conforms to After the diameter of the split portion 11 is reduced by an appropriate tool so that the spacing between the split portions 11 is reduced, the annular taper groove 3A is elastically restored by the taper ring member 4 itself.
Install by pressing inside.

With this structure, the taper ring member 4 has its own elastic restoring force and the inner and outer tapered surfaces 4.
D, 4B and annular taper groove 3A in bearing sleeve 3
By the action of the inner and outer tapered surfaces 3D, 3C, the thrust surfaces 4C, 4E on both axial sides of the taper ring member 4 are securely fixed in the annular tapered groove 3A and do not move in the circumferential direction. Can support the opposing thrust surfaces 7A and 8A of the outer races 7 and 8 of the pair of tapered bearings 5 and 6, so that the tapered sleeves 5 can be made of lightweight metal such as aluminum. Alternatively, even if 6 causes a creep phenomenon in which the outer race 7 or 8 rotates together with the inner race due to lack of lubricating oil or an assembly error, and relative rotation occurs between the taper ring member 4 and the outer race 7 or 8, There is almost no wear on the thrust surfaces of both, and the teeth in the bevel gear engagement with the ring gear of the front differential are Nor adversely affect the Ri. Further, since the taper ring member 4 does not move in the circumferential direction, there is no fear of wear due to relative rotation between the taper ring member 4 and the annular taper groove 3A of the bearing sleeve 3. Further, until the tapered ring member 4 is installed, there is no reduced diameter portion on the inner circumference of the bearing sleeve 3, so that the degree of freedom in the assembling order of the inner and outer tapered bearings 5 and 6 is increased, and the assembling property is improved. Will be done.

FIG. 2 shows a second embodiment of the bearing sleeve device of the present invention. FIG. 2 (A) is a sectional view of the essential parts, and FIG.
(B) is a perspective view of a taper ring member. This embodiment also has basically the same configuration as that described in the first embodiment, but in this embodiment, the taper ring member 4 is used.
A large number of concave and convex grooves and knurls 4G were formed on the outer peripheral surface of the.
Accordingly, the taper ring member 4 is provided on the bottom portion 3A of the annular taper groove 3A formed on the inner circumference of the bearing sleeve 3.
The knurl 3G corresponding to the knurl 4G is formed. In the present embodiment, the taper ring member 4 of the first embodiment has its own elastic restoring force and the inner and outer taper surfaces 4D and 4B and the inner and outer taper surfaces 3D of the annular taper groove 3A in the bearing sleeve 3 in the present embodiment. In addition to the action with 3C, the tapering member 4 does not move in the circumferential direction with respect to the bearing sleeve 3, and there is no fear of wear due to relative rotation therebetween.

FIG. 3 shows a third embodiment of the tapered ring member in the bearing sleeve device of the present invention.
In this embodiment, as the taper ring member 4 in the first embodiment, an inner circumferential groove 4F is formed on the inner circumference of the taper ring member 4.
It is the one that is formed. By forming the inner peripheral groove 4F, the weight of the taper ring member 4 is significantly reduced, and the thickness of the outer peripheral surface 4A is also reduced, so that when the taper ring member 4 is assembled in the bearing sleeve 3, a tool or the like is used. The diameter can be easily reduced when used.

FIG. 4 shows a fourth embodiment of the tapered ring member in the bearing sleeve device of the present invention.
In this embodiment, as the taper ring member 4 in the first embodiment, the inner and outer thrust surfaces 4E and 4C for supporting the thrust surfaces 7A and 8A (see FIG. 1) of the inner and outer outer races 7 and 8 facing each other are used. , The taper ring member 4 is formed so as to be inclined at an appropriate angle θ with respect to the radial direction so as to axially press the opposing thrust surfaces of the outer races at the time of assembling and expanding the diameter by the elastic restoring force of the taper ring member 4 itself. It is the one adopted. As a result, the taper ring member 4 causes the annular taper groove 3 of the bearing sleeve 3 to move.
After being assembled in A, the inner and outer thrust surfaces 4E and 4C of the taper ring member 4 are opposed to the thrust surfaces 7A and 8A of the outer races 7 and 8 of the taper bearing by the elastic restoring force of the taper ring member 4 itself. Since it is pressed in the axial direction, it is possible to effectively prevent the outer race from turning around when the creep phenomenon occurs.

FIG. 5 shows a fifth embodiment of the tapered ring member in the bearing sleeve device of the present invention.
In this embodiment, as the taper ring member 4 in the first embodiment, a compression spring 13 is arranged between the facing surfaces of the split portion 11 of the taper ring member 4. Spring receiving holes 4F, 4F are provided so as to face each other between the facing surfaces of the split portion 11 of the taper ring member 4, and the spring receiving holes 4F,
Both ends of the coiled compression spring 13 are inserted and locked in 4F. The spring 13 is not limited to the coil-shaped one, but any appropriate spring can be adopted. Also, it goes without saying that the taper ring member 4 of the second, third and fourth embodiments may be adopted in the present embodiment. In the present embodiment, with the above configuration, the restoring force of the spring 1 acts in addition to the elastic restoring force of the taper ring member 4 itself, so that the inner and outer tapered surfaces 4D and 4D of the taper ring member 4 are provided.
The taper ring member 4 is securely fixed in the annular taper groove 3A by the taper engagement action with the inner and outer tapered surfaces 3D, 3C of the annular taper groove 3A in the bearing sleeve 3 of B, and deviates in the circumferential direction. Disappears.

In each of the above embodiments, the split portion 11 of the tapered ring member 4 may be assembled so as to be aligned with the position of the lubricating groove provided in the axial direction (not shown) of the bearing sleeve 3. Further, by providing a protrusion in the lubrication groove corresponding to the split portion 11 in the taper ring member 4, the protrusion serves to prevent the taper ring member 4 from rotating in the bearing sleeve 3 in the circumferential direction. It can also be configured to.

Although the respective embodiments have been described above, the cross-sectional shape and material of the bearing sleeve, the cross-sectional shape of the annular taper groove, and the cross-sectional shape of the taper ring member and the taper ring corresponding to the cross-sectional shape and material of the bearing sleeve are within the scope of the present invention. It goes without saying that the material of the member and the like can be appropriately selected. Further, it goes without saying that the present invention can be applied to a case where the tapered ring member is directly installed in the casing without using the bearing sleeve.

[0016]

As described above in detail, the present invention provides a bearing sleeve device made of aluminum or the like for supporting a pair of taper bearings axially spaced from each other on the inner circumference thereof. An annular taper groove having a substantially trapezoidal cross section is provided on the inner peripheral surface of the bearing sleeve between the tapered bearings, and a split portion is formed by cutting out a part of the circumference with a tapered surface conforming to the annular taper groove. By installing the taper ring member made of steel or the like in the annular taper groove by the elastic restoring force of the taper ring member itself, the thrust surface of the taper ring member is provided on each outer side of the pair of taper bearings. Since it is configured to support the thrust surfaces of the races that face each other, wear resistance is maintained while using lightweight metal such as aluminum for the bearing sleeve. By reducing the diameter of the excellent taper ring member such as steel with a tool using the split part and installing and fixing it in the annular taper groove of the inner peripheral surface of the bearing sleeve, the taper bearing should be lubricated with oil. Even if the outer race causes a creep phenomenon that rotates with the inner race due to lack or assembly error, and relative rotation occurs between the taper ring member and the outer race, the thrust surfaces of both are hardly worn. Also, there is no adverse effect on tooth contact in the meshing of the power transmission system. Further, until the tapered ring member is installed, since there is no reduced diameter portion on the inner circumference of the bearing sleeve, the degree of freedom in the assembling order of the inner and outer tapered bearings is increased, and the assembling property is also improved. .

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a bearing sleeve device of the present invention.

FIG. 2 is a diagram showing a second embodiment of the bearing sleeve device of the present invention.

FIG. 3 is a view showing a third embodiment of the taper ring member in the bearing sleeve device of the present invention.

FIG. 4 is a view showing a fourth embodiment of the taper ring member in the bearing sleeve device of the present invention.

FIG. 5 is a view showing a fifth embodiment of the tapered ring member in the bearing sleeve device of the present invention.

FIG. 6 is a cross-sectional view showing a conventional bearing device.

FIG. 7 is a sectional view showing a conventional bearing sleeve device.

FIG. 8 is a sectional view showing a conventional improved bearing sleeve device.

[Explanation of symbols]

 1 Driven shaft 3 Bearing sleeve 4 Tapered ring member 5 Inner taper bearing 6 Outer taper bearing 7 Outer race 8 Outer race 11 Split section

Claims (5)

[Claims] 1. A bearing sleeve device made of aluminum or the like for supporting a pair of tapered bearings, which are installed at intervals in the axial direction, on the inner circumference, wherein a cross-section of the bearing sleeve between the pair of tapered bearings is substantially the same. In addition to providing a trapezoidal annular taper groove, a taper ring member made of steel or the like having a tapered surface matching the annular taper groove on the outer periphery and having a cutout part on the circumference is formed by the taper ring. The thrust surface of the tapered ring member is configured to support the thrust surfaces of the outer races of the pair of tapered bearings, which are opposed to each other, by placing the members in pressure contact with each other in the annular tapered groove by the elastic restoring force of the member itself. Bearing sleeve device characterized in that 2. A knurling or the like is formed on the bottom of the annular tapered groove of the bearing sleeve and the outer peripheral surface of the tapered ring member so as to prevent the mutual movement in the circumferential direction. The bearing sleeve device according to claim 1. 3. The bearing sleeve device according to claim 1, wherein an inner peripheral groove is formed on the inner periphery of the tapered ring member. 4. The thrust surface of the taper ring member supporting the opposing thrust surface of each outer race in the pair of tapered bearings is inclined so as to axially press the opposing thrust surface of each outer race. The bearing sleeve device according to claim 1, wherein the bearing sleeve device is formed. 5. The bearing sleeve device according to claim 1, wherein a spring is arranged between opposed surfaces of the split portion of the tapered ring member.