JP2003269582A - Rotary member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary member capable of surely preventing relative sliding in a core body and a peripheral edge part in a circumferential direction without providing any processing in the outer peripheral wall surface of the core body even when it is used for a long period under harsh conditions. <P>SOLUTION: In the composite structural rotary member 5 in which the metal core body 3 to be bound to a rotation axis 1 and the resinous peripheral edge part 4 are integrally bound, the center O1 of the core body 3 is set to be eccentric to the rotation axis center O2 and the center O3 of the edge part 4 is set coaxially with the axis center O2. The outer peripheral wall surface 3A of the core body 3 is set on a first circle 7 of radius R1 having the center O1 as a curvature center, and the wall surface 3A is fitted in the inner peripheral wall surface 4A on a second circle 8 provided in the edge part 4 coaxially with the first circle 7, thereby constituting the rotary member 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary member suitable for application to, for example, a pulley.

[0002]

2. Description of the Related Art As a rotary member suitable for application to a pulley, for example, as shown in FIG. 11, a metal cup-shaped core body 3 having a boss portion 2 connected to a rotary shaft 1 at a central portion thereof.
And a resin peripheral portion 4 concentrically provided on the outer periphery of the core body 3.
12, a metal disk-shaped core body 3 having a shaft hole 6 coupled to the rotary shaft 1 at its center, and a concentric outer periphery of the core body 3, as shown in FIG. The rotating member 5 provided with the resin peripheral part 4 provided in the above, that is, the rotating member 5 having a composite structure of metal and resin is often used.

When the rotating member 5 is applied to, for example, a pulley, the strength and hardness required for connecting the rotating shaft 1 are such that the metal cup-shaped core body 3 or the metal disk-shaped core body 3 is required. The resin-made peripheral edge portion 4 ensures the wear resistance required for winding belts such as V-belts, timing belts, flat belts, and the function of suppressing wear and damage to the belts. Therefore, it is possible to obtain the properties required for a pulley, such as mechanical strength, wear resistance, and protection of belts, and it is possible to reduce the weight thereof as compared with a metal product.

[0004]

By the way, the core body 3 and the peripheral edge portion 4 of the conventional rotary member 5 are fitted by press-fitting the outer peripheral wall surface 3A of the core body 3 into the inner peripheral wall surface 4A of the peripheral edge portion 4. Alternatively, the core body 3 is insert-molded on the peripheral edge portion 4 to be integrally joined by a method of fitting the outer peripheral wall surface 3A to the inner peripheral wall surface 4A. However, the rotary member 5 integrally coupled by a press-fitting method or an insert molding method is applied to, for example, a water pump pulley, a power steering pulley, a car compressor driving pulley, a crankshaft pulley, an alternator pulley of an automobile. When used for a long period of time under severe conditions, there is a possibility that relative sliding in the circumferential direction may occur between the core body 3 and the peripheral edge portion 4. Specifically, a relative slip in the circumferential direction occurs on the outer peripheral wall surface 3A of the core body 3 and the inner peripheral wall surface 4A of the peripheral edge portion 4.

The present invention has been made in view of the above circumstances, and even if it is used for a long period of time under severe conditions without performing any processing on the outer peripheral wall surface of the core,
An object of the present invention is to provide a rotating member capable of reliably preventing relative slippage in the circumferential direction between the core body and the peripheral portion.

[0006]

In order to achieve the above object, a rotating member according to a first aspect of the present invention is provided with a metal core body coupled to a rotary shaft and an outer periphery of the core body. In a rotating member having a resin-made peripheral portion, the center of the core is set eccentrically from the axial center of the rotating shaft, and the center of the peripheral portion is set concentrically with the axial center of the rotating shaft. In addition, the outer peripheral wall surface of the core body is set on a first circumference with the center of the core body as a center of curvature, and the outer peripheral wall surface is provided with a second circle concentric with the first circumference in the peripheral portion. It is characterized in that it is fitted to the inner peripheral wall surface on the circumference.

In order to achieve the above object, a rotating member according to a second aspect of the present invention is a rotating member made of a metal, which is coupled to a rotating shaft, and a resin member provided on the outer periphery of the rotating member. In a rotating member having a peripheral edge portion, the center of the core body and the peripheral edge portion are set concentrically with the axis center of the rotating shaft, and the outer peripheral wall surface of the core body has a shape other than a perfect circle. It is characterized in that the core body is fitted to an inner peripheral wall surface provided on the peripheral portion.

Further, in the invention described in claim 2,
The outer peripheral wall surface of the core body is preferably oval.

Further, in the invention described in claim 2, the outer peripheral wall surface of the core may be polygonal.

According to the first aspect of the invention, even if the center of the core is set eccentrically from the axis of the rotary shaft, the center of the peripheral portion is set concentric with the center of the rotary shaft. Since the eccentricity between the body and the rotary shaft is canceled, the peripheral portion can be simultaneously rotated concentrically with the rotation of the rotary shaft. In addition, the outer peripheral wall surface of the core body has a center of curvature with the center of the core body as the center of curvature.
The second that is set on the circumference and fits the outer peripheral wall surface of the core body
Since the inner peripheral wall surface on the circumference is provided concentrically with the first circumference on the peripheral edge portion, relative sliding in the circumferential direction does not occur between the outer peripheral wall surface of the core body and the inner peripheral wall surface of the peripheral portion.

According to the second aspect of the invention, it is possible to rotate the peripheral portion concentrically and simultaneously with the rotation of the rotary shaft. Further, relative sliding in the circumferential direction does not occur on the outer peripheral wall surface of the core body and the inner peripheral wall surface of the peripheral portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rotating member according to the present invention will be described below with reference to the drawings. In addition, FIG.
1, the same parts as those of the conventional example described with reference to FIG. 1 is a front view showing an embodiment of a rotating member according to the invention described in claim 1, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and in these drawings, the rotating member 5 is a rotary member. Axis 1
And a resin-made peripheral edge portion 4 provided on the outer circumference of the core body 3, and the outer peripheral wall surface 3A of the core body 3 is provided on the inner peripheral wall surface 4A of the peripheral edge portion 4. They are integrally joined by a method of press fitting and fitting, a method of fitting the outer peripheral wall surface 3A to the inner peripheral wall surface 4A by insert molding the core body 3 on the peripheral edge portion 4, and the like.

The center O1 of the core 3 is the axial center O2 of the rotary shaft 1.
It is set to be eccentric from the shaft center O2 corresponding to the eccentric amount L on a straight line C1 passing through, and the center O3 of the peripheral edge portion 4 is set concentrically with the shaft center O2 of the rotary shaft 1. Further, the outer peripheral wall surface 3A of the core body 3 is set on the first circumference 7 having the radius R1 with the center O1 as the center of curvature, and the outer peripheral wall surface 3A is provided on the peripheral edge portion 4 concentrically with the first circumference 7. It is fitted to the inner peripheral wall surface 4A on the two circumferences 8. Then, the outer peripheral surface 4B of the peripheral edge portion 4 has a third circumference 9 having a radius R2 with the axis center O2 of the rotating shaft 1 as the center of curvature.
The outer peripheral surface 4 </ b> B is set on the upper side, and the outer peripheral surface 4 </ b> B engages with the engaging teeth 1 that engage with the engaging teeth provided on the inner periphery of the timing belt (not shown).
0 is formed. Therefore, the rotating member 5 can be applied as a timing pulley. In addition, 1 in the figure
Reference numeral 5 indicates a balance hole.

As described above, the center O1 of the core body 3 is the rotary shaft 1
Even if the center O3 of the peripheral portion 4 is eccentrically set on the straight line C1 from the axis center O2 of the
Since the eccentric amount L of the core 3 and the rotating shaft 1 is set to be concentric with 2, the peripheral portion 4 is simultaneously rotated concentrically with the rotation of the rotating shaft 1 to function as a timing pulley. You can

Further, the outer peripheral wall surface 3A of the core body 3 is set on the first circumference 7 with the center O1 of the core body 3 as the center of curvature, and the second circle fitting the outer peripheral wall surface 3A of the core body 3 is fitted. Since the inner peripheral wall surface 4A on the circumference 8 is provided in the peripheral edge portion 4 concentrically with the first circumference 7, the outer peripheral wall surface 3A of the core body 3 and the inner peripheral wall surface 4A of the peripheral edge portion 4 are provided.
There is no relative slip in the circumferential direction. That is, even if the outer peripheral wall surface 3A of the core body 3 is not subjected to a cutting process such as an anti-slip process or a rolling process, even if it is used as a timing pulley for a long time under severe conditions, It is possible to reliably prevent the relative slippage in the circumferential direction.

On the other hand, as shown in FIG. 3, a metal disk-shaped core body 3 having a shaft hole 6 to be coupled to the rotary shaft 1 and a resin peripheral portion 4 provided on the outer periphery of the core body 3. Even if the rotating member 5 is provided with the rotating member 5 described in FIG. 1 and FIG.
Similarly, even if it is used as a timing pulley for a long time under severe conditions, it is possible to reliably prevent the relative slippage in the circumferential direction between the core body 3 and the peripheral edge portion 6. In addition, in the rotating member 5 shown in FIG.
Since the same parts as those of the rotating member 5 are denoted by the same reference numerals, the description of the overlapping structure and operation will be omitted.

FIG. 4 is a front view showing an embodiment of a rotating member according to the invention described in claim 2, and FIG. 5 is a sectional view taken along the line BB in FIG. 4. In these drawings, the rotating member 5 is shown. Is provided with a metal cup-shaped core body 3 coupled to the rotating shaft 1 and a resin peripheral portion 4 provided on the outer periphery of the core body 3, and the core body 3 is provided on the inner peripheral wall surface 4 A of the peripheral portion 4. The outer peripheral wall surface 3A is press-fitted into the inner peripheral wall surface 3A, and the outer peripheral wall surface 3A is fitted into the inner peripheral wall surface 4A by insert molding the core body 3 into the peripheral edge portion 4.

The center O1 of the core 3 and the center O3 of the peripheral portion 4 are set concentrically with the axis O2 of the rotary shaft 1. Also,
Elliptical shape 11 in which the outer peripheral wall surface 3A of the core 3 is an ellipse 11
And the core 3 is fitted to the inner peripheral wall surface 4A of the elliptical shape 12 formed of an ellipse provided on the peripheral portion 4.
Then, on the outer peripheral surface 4B of the peripheral edge portion 4, the engaging teeth 1 that engage with the engaging teeth provided on the inner circumference of the timing belt (not shown).
0 is formed. Therefore, the rotating member 5 can be applied as a timing pulley.

With such a structure, the peripheral edge portion 4 can be simultaneously rotated concentrically with the rotation of the rotary shaft 1 to function as a timing pulley. Moreover, relative slippage in the circumferential direction does not occur on the outer peripheral wall surface 3A of the elliptical shape 11 of the core body 3 and the inner peripheral wall surface 4A of the elliptical shape 12 of the peripheral edge portion 4. That is, even if the outer peripheral wall surface 3A of the core body 3 is not subjected to a cutting process such as an anti-slip process or a rolling process, even if it is used as a timing pulley for a long time under severe conditions, It is possible to reliably prevent the relative slippage in the circumferential direction. Further, it has an advantage that it can be easily manufactured.

The outer peripheral wall surface 3A of the core body 3 is formed in an elliptical elliptical shape 11 and the core body 3 is fitted to the inner peripheral wall surface 4A of an elliptical elliptical shape 12 provided in the peripheral portion 4. As described with reference to FIG. 6, the outer peripheral wall surface 3A of the core body 3 is formed into an oval elliptical shape 11 as shown in FIG.
A structure in which the core body 3 is fitted to the inner peripheral wall surface 4A of the oval oval shape 12 provided on the peripheral portion 4 may be adopted.

Further, as shown in FIG. 7, the outer peripheral wall surface 3A of the core body 3 is formed in a polygonal shape 13 having a substantially triangular shape, and the core body 3 is provided in the peripheral portion 4 and has a polygonal shape 1 having a substantially triangular shape.
4, the structure fitted to the inner peripheral wall surface 4A, as shown in FIG.
The outer peripheral wall surface 3A of the core body 3 has a polygonal shape 1 formed by a quadrangle.
3, the core body 3 is fitted to the inner peripheral wall surface 4A of a polygonal shape 14 formed of a quadrangle provided on the peripheral portion 4, or as shown in FIG. 9, the outer peripheral wall surface 3A of the core body 3 is a hexagonal shape. The core body 3 may be formed into a polygonal shape 13 and the core 3 is fitted to the inner peripheral wall surface 4A of the hexagonal polygonal shape 14 provided on the peripheral edge portion 4. Also, the core body 3
The outer peripheral wall surface 3A of the polygonal shape 1 other than the three, four, and hexagonal shapes
3 and the core 3 may be fitted to the inner peripheral wall surface 4A of the polygonal shape 14 other than the three, four and hexagons provided on the peripheral portion 4.

On the other hand, as shown in FIG. 10, a metallic disk-shaped core body 3 having a shaft hole 6 to be coupled to the rotary shaft 1 and a resin peripheral portion 4 provided on the outer periphery of the core body 3. Even with the rotating member 5 including the core member 3 and the peripheral edge thereof, as in the rotating member 5 described with reference to FIGS. 4 and 5, even when the rotating member 5 is used as a timing pulley for a long time under severe conditions. It is possible to reliably prevent the occurrence of relative slip in the circumferential direction on the portion 6. In addition, in the rotating member 5 shown in FIG.
Since the same parts as those of the rotating member 5 in FIG.

Further, in each of the above-mentioned embodiments, the peripheral portion 4
The rotating member 5 that can be applied as a timing pulley in which the engaging teeth 10 are formed on the outer peripheral surface 4B is described, but it can be applied as a flat pulley by flattening the outer peripheral surface 4B of the peripheral edge portion 4. By forming a V belt groove on the outer peripheral surface 4B of the portion 4, it can be applied as a V pulley.

[0024]

As described above, since the rotary member according to the present invention is constructed, the following special effects are obtained.

According to the first or second aspect of the present invention, the rotating member whose outer peripheral wall surface of the core body is not subjected to cutting or rolling such as anti-slip is lengthened even under severe conditions. Even after being used for a period of time, it is possible to reliably prevent relative sliding in the circumferential direction between the core body and the peripheral portion.

According to the third aspect of the present invention, the outer peripheral wall surface of the core body is formed into an oval shape, so that the outer peripheral wall surface of the core body is not subjected to cutting work such as anti-slip or rolling. The member can be easily manufactured.

According to the third aspect of the present invention, even if the outer peripheral wall surface of the core body is formed into a polygonal shape, a rotating member in which the outer peripheral wall surface of the core body is not subjected to cutting or rolling such as anti-slip It can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a rotating member according to the invention described in claim 1. FIG.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view corresponding to FIG. 2, showing another embodiment of the rotating member according to the invention described in claim 1.

FIG. 4 is a front view showing an embodiment of a rotating member according to the invention described in claim 2.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a front view showing an embodiment of a rotating member according to the invention described in claim 3.

FIG. 7 is a front view showing an embodiment of a rotating member according to the invention described in claim 4.

FIG. 8 is a front view showing a first modification of the rotating member according to the invention described in claim 4.

FIG. 9 is a front view showing a second modification of the rotating member according to the invention described in claim 4.

10 is a sectional view corresponding to FIG. 5, showing another embodiment of the rotating member according to the invention described in claim 2. FIG.

FIG. 11 is a half cross-sectional view showing a conventional example.

FIG. 12 is a half sectional view showing another conventional example.

[Explanation of symbols]

1 rotation axis 3 Metal core 3A metal core outer peripheral wall 4 resin peripheral part 4A resin inner peripheral wall surface 5 rotating members 11 oval shape 13 Polygonal shape O1 core center O2 center of rotation axis O3 Peripheral center

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshio Shimada             20-26 Okurahonmachi, Akashi-shi, Hyogo Co., Ltd.             Inside the Kanemitsu (72) Inventor Kazuyuki Oda             20-26 Okurahonmachi, Akashi-shi, Hyogo Co., Ltd.             Inside the Kanemitsu F term (reference) 3J031 AC07 BA03 BC02 BC05 CA01                       CA02 CA04

Claims (4)

[Claims] 1. A rotary member comprising a metal core body coupled to a rotary shaft and a resin peripheral edge portion provided on the outer periphery of the core body, wherein the center of the core body is the axis of the rotary shaft. The eccentricity is set from the center, the center of the peripheral portion is set concentrically with the axis center of the rotating shaft, and the outer peripheral wall surface of the core body is on the first circle with the center of the core body as the center of curvature. And the outer peripheral wall surface is fitted to the inner peripheral wall surface on the second circumference provided concentrically with the first circumference on the peripheral edge portion. 2. A rotating member comprising a metal core body coupled to a rotating shaft and a resin peripheral portion provided on the outer periphery of the core body, wherein the center of the core body and the peripheral portion is the rotation. It is set to be concentric with the axis center of the shaft, and the outer peripheral wall surface of the core body has a shape other than a perfect circle, and the core body is fitted to the inner peripheral wall surface provided in the peripheral portion. Characteristic rotating member. 3. The rotating member according to claim 2, wherein an outer peripheral wall surface of the core body has an elliptical shape. 4. The rotating member according to claim 2, wherein the outer peripheral wall surface of the core has a polygonal shape.