JPH0858304A - Bearing housing structure of wheel - Google Patents

Abstract

PURPOSE: To complete the processing of right and left respective bearing housings from one side at one time by one working machine, and obtain high concentricity on the right and left bearing housings without controlling in particular, in the bearing housing structure of a wheel. CONSTITUTION: In a wheel rotatably supported with an axle 5 through right and left bearings 3,2, respective bearing housings 16, 15 formed in the axle penetrating part 14 of a hub 11 for holding the right and left respective bearings 3, 2 are formed by cutting from either of right and left sides of the wheel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel of a wheel such as a motorcycle, and more particularly to a bearing housing formed in an axle penetrating portion of a hub of the wheel for holding a bearing interposed between the wheel and the axle. Regarding the structure.

[0002]

2. Description of the Related Art Various types of wheels such as spoke wheels, cast wheels, and panel wheels have been conventionally used as wheels for motorcycles. Since the bearings are rotatably supported via bearings on both sides (ball bearings), bearing housings for holding the bearings are formed near the left and right sides of the axle penetration portion penetrated by the wheel hub. ing.

With respect to the bearing housing of such a wheel, conventionally, the wheel is fixed by chucking the rim portion on the outer periphery of the wheel brake disc mounting surface as a reference, and the hub is sequentially subjected to cutting processing on each side. By doing so, the left and right bearing housings are separately processed. As shown in FIG. 9, the bearings 2 and 3 are inserted into the bearing housings 15 and 16 from the left and right sides.

[0004]

By the way, in the conventional bearing housing structure for a wheel as described above, the left and right bearing housings have to be separately processed from both sides thereof, which is not only a troublesome process. Without
It was difficult to maintain the accuracy of coaxiality by adjusting the shaft centers of the left and right bearing housings each time.

Incidentally, the accuracy of the concentricity of the left and right bearing housings cannot be obtained and the accuracy of the hub of the wheel is deteriorated, which causes a problem that the rim swings greatly during traveling and the steering stability deteriorates. Further, the vibration of the disk of the disk brake becomes large, and the vibration of the disk cannot be completely absorbed by the ineffective stroke of the hydraulic operation system of the brake, which causes a problem that the so-called drag of the brake occurs. .

An object of the present invention is to eliminate the inconvenience of the conventional bearing housing structure for a wheel as described above. More specifically, one processing machine is used to remove the left and right bearing housing structures from one side. It is an object of the present invention to provide a bearing housing structure for a wheel that can be processed in a single operation and that can achieve high coaxiality in the left and right bearing housings without particular control.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention rotates on an axle via left and right bearings as described in the above-mentioned claim 1. In a freely supported wheel, each bearing housing formed in the axle penetrating portion of the hub for holding each of the left and right bearings is formed by cutting from either the left or right side of the wheel. It is what

Further, in the bearing housing structure of the wheel described in claim 1, there is provided the above-mentioned claim 2 structure.
The inner diameter between the left and right bearings of the axle penetrating portion of the hub is equal to or larger than the outer diameter of at least one of the bearings.

Further, in the wheel bearing housing structure described in claim 1, there is provided the above-mentioned claim 3 structure.
As described in (1), the axle penetrating portion formed on the hub of the wheel has a taper shape in the axial direction of the axle, and depending on the taper shape of the axle penetrating portion, one of the left and right bearing housings is It is characterized in that the diameter is formed larger than the other diameter.

Further, in the bearing housing structure for a wheel described in claim 3, as described in claim 4, a plurality of rows of bearings are arranged on the side of the small-diameter bearing housing. It is characterized by that.

According to a fifth aspect of the present invention, there is provided the wheel bearing housing structure according to the third aspect.
As described in, the large bearing arranged on the side of the large-diameter bearing housing is arranged closer to the center of the vehicle body than the small bearing arranged on the side of the small-diameter bearing housing. To do.

Further, in the bearing housing structure of the wheel described in claim 3, the above-mentioned claim 6 is used.
As described in, a single disc brake is arranged on the side of the large diameter bearing housing of the wheel.

[0013]

[Operation] According to the construction as described in claim 1, the processing of each bearing housing in the wheel can be completed by one processing machine at one time, and the left and right bearing housings can be processed at the time of processing. There is no deviation of the axes.

Further, according to the structure described in claim 2, the cutting process from one side can be easily performed.

Further, according to the structure described in claim 3, the length of the processed portion can be reduced, and it becomes easy to perform cutting from one side by one processing machine, It is also easy to insert the bearing into each bearing housing after molding.

Further, according to the structure as described in claim 4, the large-diameter bearing arranged in the large-diameter bearing housing having the increased capacity is divided into the double-row small-diameter bearing. By doing so, the left and right are balanced, and the permissible load as a whole increases.

Further, according to the structure as described in claim 5, the distribution of the load applied to the bearings 2 and 3 having different capacities is different depending on the capacities thereof. It is possible to equalize the service lives of the bearings 2 and 3 and reduce the width of the entire wheel.

According to the structure described in claim 6, a bearing having a large allowable load is arranged on one side of the wheel having a large load due to the mounting of the disc of the single disc brake. Therefore, the load of the disk mounted on the wheel is effectively borne by the large bearing.

[0019]

Embodiments of the bearing housing structure for a wheel according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the vicinity of a mounting portion of a front wheel of a motorcycle to which the bearing housing structure of the present invention is applied. The front wheel 1 is a front wheel 1 via bearings 2 and 3 which are ball bearings. It is rotatably attached to an axle (front axle) 5 fixed between the forks 4 and 4. Tires 6 are attached to the outer periphery of the wheel 1, and double discs are provided on both left and right side surfaces of the center of the wheel 1. -The front brake discs 7, 7 are fixed by bolts, and the front forks 4, 4 are
The calipers 8 and 8 for sandwiching the disks 7 and 7 are fixed to each other by bolts.

The wheel 1 has a hub 11 through which an axle 5 penetrates through the center thereof, and disks 7, 7 are fixed to the left and right sides of the wheel with bolts, a rim 13 on which tires 6 are mounted, and a hub 11. Each part of the plurality of hollow spokes 12 connecting the rim 13 and the rim 13 is a cast wheel integrally manufactured by integral molding.

As for the brake discs 7, 7 mounted on the left and right side surfaces of the wheel 1, as shown in FIG.
It consists of two pieces, a bracket disc 72 fixed to the wheel hub 11 with bolts 71 and a rotor 73 sandwiched between the pads of the caliper 8.
2 and the rotor 73 are connected by a pin 74.

As for the connecting portion of the disk 7 by the pin 74, conventionally, as shown in FIG. 13, in order to reduce the control for the crimping and rattling at the time of manufacturing and to prevent the noise generation at the rattling. Via the pin 74, washer 75 and disc spring 76, the bracket disc 7
2 and the rotor 73 were connected.

However, in such a structure, since the rotor 73 is pressed against the bracket disc 72 by the disc spring 76, the seat surface 7 of the bracket disc 72 after the bracket disc 72 and the rotor 73 have been caulked and assembled.
When processing 2a, due to the runout, the bracket disc 72
On the other hand, it is difficult to provide the rotor 73 with high mounting accuracy, and the number of parts used for assembly increases.

Therefore, in the present embodiment, when the rotor 73 and the bracket disk 72 are assembled, the washer 75 and the disc spring 76 are omitted and the pin 74 is used for caulking, so that the seat surface after caulking is processed. In addition to improving the mounting accuracy of the rotor 73 by eliminating the deviation of the processing standard, the cost is reduced and the assembly is simplified by reducing the number of parts.

FIG. 11 shows a specific structure therefor.
As shown in (A), in order to reduce the catch at the time of thermal deformation of the rotor 73, the bearing end of the pin 74 is rounded, or as shown in FIG. The seating surface of the pin 74 is made large to improve the assembling accuracy. As shown in FIG. 11 (C), the pin has two members 74a,
It is conceivable to reduce the working force of the caulking process by using the structure 74b, or to secure a margin for the heat deformation of the rotor 73 by making the cross section of the pin 74 an ellipse as shown in FIG. ing.

In the first embodiment of the wheel bearing housing structure of the present invention, as shown in FIG. 2, the hub 11 of the wheel is provided along the axial direction of the axle 5 penetrating its center. The axle penetrating portion 14 is formed so that the inner diameter has a taper shape, and the bearings 2, which are interposed between the axle 5 and the bearing 2, are disposed near the left and right ends of the axle penetrating portion 14.
Bearing housings 15 and 16 for holding 3 are formed.

Each of the bearing housings 15 and 16 formed on a part of the inner surface of the axle penetrating portion 14 is processed from a large diameter side of the axle penetrating portion 14 to a side thereof by a cutting machine such as one tool or a forming tool. The hub housing 11 is formed by a single cutting process using the brake disk mounting surface 11a of the hub 11 as a reference surface, and the bearing housing 15 positioned on the large diameter side has a shape corresponding to the tapered shape of the axle penetrating portion 14. The bearing housing 16 having a large diameter and located on the small diameter side is formed to have a small diameter.
Each of the bearings 5 and 16 has a structure in which the bearings 2 and 3 can be inserted from the large diameter side of the axle penetration portion 14.

The bearings 2 and 3 interposed between the bearing housings 15 and 16 and the axle 5 are respectively the bearing housings 15 and 1.
One of the bearings 2 is made larger than the other of the bearings 3 in accordance with the diameter of 6, and the bearings 2 and 3 are positioned on the axle 5 via the collar 18 between them, so that the bearing housing 16 The outer end surface 16a and the circlip 19 in the bearing housing 15 prevent the bearings 2 and 3 from coming off.

The collar 18 has a collar 1 following the bearing 3.
When inserting 8 into the axle penetrating portion 14 and assembling it to the hub 11, in order to stably hold the position in the axle penetrating portion 14, one of the collars 18 of the collar 18 is provided at a position corresponding to one bearing housing 16. A holding member 20 is attached to the outer peripheral surface.

The openings at both ends of the axle penetrating portion 14 outside the bearings 2 and 3 are closed by the seal 21 and the cover 23 at the large-diameter side end and by the seal 22 at the small-diameter side end. Has been done.

Each bearing housing 1 of the bearings 2 and 3
Regarding the press-fitting into the axles 5, 16, the bearing 3 is press-fitted into the bearing housing 16 from the large diameter side of the axle penetration portion 14, the collar 18 is inserted into the axle penetration portion 14, and then the bearing 2 is inserted into the bearing housing 15. For the positioning of the bearings 2 and 3 at that time, the outer end surface 16a of the bearing housing 16 is used as a reference and the bearing 3 is brought into contact with the outer end surface 16a to perform the entire positioning. Alternatively, the overall positioning may be performed by press-fitting the bearing 2 from the large-diameter side brake disc mounting surface 11a by a certain distance.

According to the above-described embodiment, the left and right bearing housings 15 and 16 of the wheel 1 are formed by cutting from one side. It can be completed in one time by the processing machine, and each bearing housing 15, 1
The axes of 6 are not displaced from each other.

Further, since the inner diameter of the axle penetrating portion 14 is tapered and the diameters of the bearing housings 15 and 16 formed near the left and right ends thereof are changed according to the tapered shape, the length of the processed portion is increased. Can be reduced
The work of cutting from one side by the processing machine becomes easy, and the work of inserting the bearings 2, 3 into the bearing housings 15, 16 after molding becomes easy.

FIG. 3 shows a second embodiment of the bearing housing structure of the present invention. Compared with the first embodiment, the bearing 3 arranged in the bearing housing 16 on the small diameter side of the axle penetrating portion 14 is shown. Is different in that it has two rows of a bearing 3a and a bearing 3b. In such a case, the large bearing 2 is arranged in the large-diameter side bearing housing 15 having an increased capacity, while the small-diameter side is arranged. Since the bearings 3a and 3b are arranged in a plurality of rows, the left and right are balanced, and the allowable load as a whole is increased.

FIG. 4 shows a third embodiment of the bearing housing structure according to the present invention. As a result of changing the left and right bearing housing diameters as compared with the first embodiment, a large diameter with a sufficient capacity can be obtained. The difference is that the large bearing 2 on the side is moved inward (close to the vertical center of the vehicle body). In such a case, the length of the beam ( That is, by changing the length from the input point of the load applied to the wheel to the bearings 2 and 3) due to the grounding of the wheel, the distribution of the load applied to the bearings 2 and 3 is changed according to the capacity of each bearing 2 and 3. The service life of the bearings 2 and 3 can be equalized, and the width of the entire wheel can be reduced.

FIG. 5 shows a fourth embodiment of the bearing housing structure of the present invention. In the above first embodiment, the disks of the double disk brake are mounted on the left and right sides of the hub 11 of the wheel. On the other hand, in this embodiment, the disc of the single disc brake is mounted on one side of the hub 11 on the side of the large bearing 2.

In the wheel 1 equipped with the disc of such a single disc brake, a large load is applied to one side on which the disc is mounted. Therefore, the allowable load of the bearing 2 on one side is changed by changing the diameters of the left and right bearing housings 15 and 16. The large structure is effective to handle the load on the disc mounting side.

In each of the embodiments described above, the bearing housing 1 is formed in the vicinity of the left and right ends of the axle penetrating portion 14 with a tapered inner diameter.
It is common in that the diameters of 5 and 16 are changed, and by doing so, it is possible to reduce the length of the processing part, and it becomes easy to perform cutting work from one side by the processing machine, Although it has a common effect of facilitating the work of inserting the bearings 2 and 3 into the bearing housings 15 and 16, respectively, the bearing housing structure of the wheel of the present invention is not necessarily limited to the above structure. It is not something that will be done.

That is, the processing of the left and right bearing housings can be completed from one side by one processing machine at a time, and in order to increase the coaxiality of the left and right bearing housings, for example, FIGS. As shown in FIG.
It is also possible to adopt a structure in which the inner diameters of the bearings are not provided with a taper, and the bearing housings 15 and 16 formed near the left and right ends thereof have the same diameter.

In the embodiment shown in FIG. 6, an escape portion having a diameter larger than that of the bearing housings 15 and 16 is formed in the axle penetrating portion 14 of the wheel material before the processing of the bearing housings. The processing length is reduced.

In each of the embodiments shown in FIGS. 7 and 8, the axle penetration portion 14 and the bearing housings 15 and 16 having the same diameter are machined from one side, and shown in FIG. In FIG. 8, the bearings 2 and 3 are positioned with respect to the hub 11 by the outer end surface 16a of one of the bearing housings 16 machined in the hub 11. The one shown in FIG. The circlip 19 provided therein positions the bearings 2 and 3 with respect to the hub 11.

The above-described embodiments are all cast wheels, but the bearing housing structure of the present invention is applicable not only to cast wheels but also to spoke wheels and other wheels. Needless to say.

[0044]

According to the bearing housing structure for a wheel of the present invention as described above, the processing of the left and right bearing housings from one side can be completed by one processing machine at a time, and The bearing housing can be easily processed, and the concentricity of the left and right bearing housings can be increased without any troublesome control, preventing deterioration of steering stability due to rim deflection during driving and disc brake operation. It is effective in preventing the drag of the brake caused by the shake of the disc.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing the vicinity of a front wheel of a motorcycle to which an embodiment of a wheel bearing housing structure of the present invention is applied.

FIG. 2 is a first part of a bearing housing structure of a wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 3 is a second part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 4 is a third part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 5 is a fourth part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 6 is a fifth part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 7 is a sixth part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 8 is a seventh part of the bearing housing structure of the wheel of the present invention.
Sectional drawing which shows an Example.

FIG. 9 is a cross-sectional explanatory view corresponding to FIG. 1, showing a bearing housing structure of a conventional wheel.

FIG. 10 is a side view showing a part of a brake disc attached to a wheel to which the embodiment of the bearing housing structure of the present invention is applied.

FIG. 11 is a vertical cross-sectional view showing each modified example of the assembling structure of the rotor and the bracket disc in the brake disc shown in FIG.

12 is a partial cross-sectional side view showing still another improved example of the assembly structure of the rotor disc and the bracket disc in the brake disc shown in FIG.

FIG. 13 is a vertical cross-sectional view showing a conventional example of an assembly structure of a rotor disc and a bracket disc in a brake disc.

[Explanation of symbols]

 1 Wheel 2 Bearing 3 Bearing 5 Axle 7 Brake Disc 11 Hub 14 Axle Penetration 15 Bearing Housing 16 Bearing Housing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Oshita 2500 Shinkai, Iwata, Shizuoka Prefecture Yamaha Motor Co., Ltd.

Claims (6)

[Claims] 1. In a wheel rotatably supported on an axle via left and right bearings, each bearing housing formed in an axle penetrating portion of a hub for holding each of the left and right bearings is located on either side of the wheel. A bearing housing structure for a wheel, which is formed by cutting from one side. 2. The bearing housing structure for a wheel according to claim 1, wherein an inner diameter between the left and right bearings of the axle penetrating portion of the hub is equal to or larger than an outer diameter of at least one of the bearings. 3. The axle penetrating portion formed on the hub of the wheel has a taper shape in the axial direction of the axle, and one of the left and right bearing housings has the other diameter depending on the taper shape of the axle penetrating portion. The bearing housing structure for a wheel according to claim 1, wherein the bearing housing structure is formed to have a diameter larger than the diameter. 4. A bearing housing structure for a wheel according to claim 3, wherein a plurality of rows of bearings are arranged on the side of the small-diameter bearing housing. 5. The large bearing arranged on the side of the large diameter bearing housing is arranged closer to the center of the vehicle body than the small bearing arranged on the side of the small diameter bearing housing. 3. The bearing housing structure of the wheel according to item 3. 6. On the side of the large diameter bearing housing of the wheel,
A bearing housing structure for a wheel according to claim 3, wherein a single disc brake is arranged.