KR101342170B1 - Pulley for use with toothed belt - Google Patents

Abstract

By providing a pulley for a toothed belt that reduces manufacturing costs by simplifying the manufacturing process, shortens manufacturing time, improves production efficiency, prevents the occurrence of fluid sounds and bursting sounds, and reduces noise.

In the toothed belt pulley (100) consisting of disc bodies (105, 106) having an tooth (101) fitted with an inner circumference (104) fitted to a rotating shaft (104) and engaged with a toothed belt (110) on an outer circumference thereof, the disk The sieves 105 and 106 are divided into a plurality in the direction of the rotation axis to form a gap, and are attached to each other.

Description

Pulley for toothed belt {PULLEY FOR USE WITH TOOTHED BELT}

The present invention relates to a toothed belt pulley that engages with a toothed belt and transmits a rotational movement.

Conventionally, a toothed belt pulley which releases air before engaging the toothed belt pulley with the toothed belt, reduces the occurrence of fluid sound or bursting sound when compressed air leaks out from the gap, and reduces the noise. It is known.

This known toothed belt pulley 500 forms a circumferential cutout 502 in the tooth 501 engaged with the toothed belt 510, as shown in FIGS. 6 to 8. Before the toothed belt pulley 500 engages with the toothed belt 510, the compressed air is discharged from the cutout 502 in the direction of the tooth bottom 503 so that the compressed air is connected with the toothed belt 510. Noise is reduced by reducing the generation of a fluid sound and a rupture sound by leaking from the left side of the interlocking tooth 501 to the left and right of the toothed belt pulley 500 (refer patent document 1).

[Patent Document 1] Microfilm (Japanese Patent Application Laid-Open No. 62-87251) of Japanese Utility Application No. 60-178303 (No. 3-5, FIGS. 1 to 3)

However, since the above-mentioned toothed belt pulley 500 needs to form the circumferential cutout 502 in the tooth 501 by cutting or the like, the manufacturing cost increases as the manufacturing process increases. At the same time, there is a problem that the production time is long and the production efficiency is lowered.

In addition, since the depth of the cutout 502 is the height of the tooth 501, the amount of air that can be discharged is limited, and at the same time, a fluid sound or a rupture sound flowing through the cutout 502 is generated. Therefore, there was a problem that the noise reduction effect was low.

The present invention solves the problems of the prior art as described above, that is, the object of the present invention is to reduce the manufacturing cost by simplifying the manufacturing process, to shorten the manufacturing time and to improve the production efficiency, It is to provide a pulley for a toothed belt that prevents the occurrence of sound or bursting sound and reduces noise.

The invention according to claim 1 is a toothed belt pulley comprising a disc body having an tooth with an inner circumference fitted to a rotating shaft and engaged with a toothed belt on an outer circumference, wherein the disk body is provided in plural in the rotation axis direction. The plurality of disk bodies are sandwiched and formed by forming a gap in the direction of the rotational axis, and the plurality of disk bodies are fitted to the rotational shaft with a gap retainer defining the gap therebetween. The above-described problem is further solved by the gap holder having an inner circumference fitted to the rotating shaft and an outer circumference formed in a non-circular shape.

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In the toothed belt pulley of the present invention according to the present invention, in the toothed belt pulley comprising a disc body having an tooth with an inner circumference fitted to a rotating shaft and engaging with a toothed belt on an outer circumference, the disk body is a rotary shaft. The plurality of disks are configured to be divided into a plurality of directions, and the plurality of disks are compressed by forming a gap in the rotational axis direction so that the compressed air is engaged when the toothed belt pulley engages with the toothed belt. Since it can be discharged into the spaces between the sieves, the generation of fluid sounds and rupture noises is prevented, the noise is reduced, and there is no need to process any of the plurality of disk bodies, which simplifies the manufacturing process and reduces the manufacturing cost. As a result, the production time can be shortened, thereby improving production efficiency.

Moreover, in addition to the said effect, the toothed belt pulley of this invention which concerns on this invention has a some disk body fitted to the rotating shaft through the clearance holder which defines a clearance gap, and it makes a plurality of disk bodies. Since the assembly process of forming and fitting the gap in the rotation axis direction is simplified, the manufacturing cost is further reduced, the production time is shortened, the production efficiency can be further improved, and the plurality of disc bodies move to narrow the gap. Because of this, the generation of the fluid sound and the rupture sound stably is prevented, and the noise is further reduced.

In addition to the above effects, the toothed belt pulley according to the first aspect of the present invention further provides a clearance holder between the disk body by the inner circumference being fitted to the rotating shaft and the outer circumference being formed in a non-circular shape. By changing the radial depth of the space placed in the circumferential direction, it is possible to keep the plurality of disk bodies in a large diameter portion in a stable and parallel manner, and to maintain the capacity of the space placed between the plurality of disk bodies in the small diameter portion. This ensures the occurrence of fluid sound or bursting sound, and reduces noise.

In the present invention, a toothed belt pulley comprising a disc body having an tooth with an inner circumference fitted to a rotating shaft and engaged with a toothed belt on an outer circumference, wherein the disk body is divided into a plurality of parts in the rotation axis direction. At the same time, the plurality of disk bodies are attached to each other by forming a gap in the rotation axis direction, and the plurality of disk bodies are fitted to the rotation shaft with a gap holder for defining the gap therebetween. As the holding body is fitted with the inner circumference of the rotary shaft and the outer circumference is formed in a non-circular shape, the manufacturing cost is reduced, the manufacturing time can be shortened, and the production efficiency can be improved. It is possible to provide pulleys for toothed belts, which can prevent the occurrence of fluid sounds or bursting noises and reduce noise. As long as it achieve the effect of that, the specific embodiment is also not anything to do what would.

That is, the material of the disc body of the toothed belt pulley of this invention may be metals, such as iron, and may be the material which consists of resin, ceramics, etc.

The disk body may be two or three or more.

The material of the gap holder of the pulley for toothed belt of the present invention may be a metal such as iron or any material such as resin, ceramic, or rubber.

In addition, the disc body of the pulley for toothed belts of this invention may be attached to a rotating shaft by interference fit, such as a press fit or shrink fit, and may be fixed by a bolt, a nut, etc. It may be attached by a method. Also, a key groove or a spline may be used.

In addition, the clearance holder of the pulley for toothed belts of the present invention may be simply inserted into a disk body and fixed, or may be inserted and attached to a rotating shaft like the disk body. Further, the disk body may be rotationally engaged with a pin, irregularities, or the like.

[Example]

EMBODIMENT OF THE INVENTION Below, the toothed belt pulley which is an Example of this invention is demonstrated based on drawing.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a usage form of a toothed belt pulley of the present invention, Fig. 2 is a front view and a sectional view of a first reference example of a toothed belt pulley of the present invention, and Fig. 3 is a toothed tooth of the present invention. 4 is a front view and a sectional view of a second reference example of the pulley for attaching belt, and FIG. 4 is a front view and a sectional view of the first embodiment of the pulley for toothed belt of the present invention, and FIG. 5 is a pulley for toothed belt of the present invention. A front view and a sectional view of a second embodiment of the.

In the toothed belt pulley 100 according to the embodiment of the present invention, as shown in FIG. 1, two disk bodies 105 and 106 are fitted to the rotary shaft 104 with a gap 120 therebetween. The rotational motion is transmitted by the belt 110 engaging the teeth 101 formed on the outer periphery of the disk bodies 105 and 106.

As shown in FIG. 2, the toothed belt pulley 100, which is the first reference example among the reference examples having a structure partially common to the embodiment of the present invention, has two disc bodies 105 and 106 on the rotation shaft 104. ) Is sandwiched between the gap holder 121 and the gap 120 is secured by the thickness in the axial direction of the rotation shaft 104 of the gap holder 121.

The space constituted by the gap 120 is equal to the depth of the gap between the diameter of the gap holder 121 and the diameter of the tooth bottom portion 103 of the two disc bodies 105 and 106, and the gap. It has a width defined by the thickness in the axial direction of the rotating shaft 104 of the holding body 121, and the compression when the teeth 101 of the toothed belt pulley 100 is engaged with the toothed belt 110 in this space. Since the air to be discharged is released while suppressing the increase in the pressure and the flow velocity, the generation of the fluid sound and the rupture sound is prevented, and the noise is reduced.

In addition, in the 2nd reference example of the toothed belt pulley 100 of this invention, as shown in FIG. 3, the outer diameter of the clearance holder 122 is the clearance holder of the 1st reference example mentioned above ( It is formed larger than 121, and two disk bodies 105 and 106 are fitted to the rotating shaft 104 with the gap holder 122 interposed therebetween.

In this second reference example, the air compressed when the teeth 101 of the two disk bodies 105 and 106 engage the toothed belt 110 is combined with the capacity of the space formed in the gap 120. By increasing the outer circumferential diameter of the gap holder 122 in such a range that the capacity of the space constituted by the gap 120 can be secured so as to be discharged while suppressing the increase in the flow rate, the two disc bodies 105 and 106 are separated from the gap. By increasing the contact area of the holding body 122, the two disk bodies 105 and 106 can be stably and parallelly held.

Moreover, in the 1st Example of the toothed belt pulley 100 of this invention, as shown in FIG. 4, the outer periphery shape of the clearance holder 123 is formed in square shape, Two disk bodies 105 and 106 are attached to each other with the gap holder 123 interposed therebetween.

In the first embodiment, the vertex of the outer circumferential shape of the gap holder 123 becomes the largest diameter portion, whereby the two disk bodies 105 and 106 can be stably and parallelly held, and the gap 120 is provided. Since the capacity of the space to be configured can be made larger than the shape of the outer circumference having the same diameter than that of the circular gap holder, the capacity of the space configured in the gap 120 is secured and the two disk bodies are used. Compatibility of keeping the 105 and 106 stable and parallel becomes easy.

In addition, since the outer circumferential shape of the gap holder 123 is non-circular, air compressed when the teeth 101 of the two disk bodies 105 and 106 engage with the toothed belt 110 is discharged and introduced. Since the shape of the space constituted by the gap 120 is different for each of the teeth 101 engaged, even if a little fluid or rupture sounds occur, the frequency component can be different for each tooth 101 for engagement. The overall noise can be reduced.

In addition, in the second embodiment of the toothed belt pulley 100 of the present invention, as shown in FIG. 5, the outer circumferential shape of the gap holder 124 is concave in the axial direction. It is formed in a curved shape, and two disk bodies 105 and 106 are fitted to the rotating shaft 104 with the gap holder 124 interposed therebetween.

In this second embodiment, each vertex of the outer circumferential shape of the gap holder 124 becomes the largest diameter portion, whereby the two disk bodies 105 and 106 can be stably and parallelly held, and at the same time, the gap 120 is provided. Since the capacity of the space constituted by this can be made larger than using the gap holder 123 of the first embodiment, the capacity of the space constituted by the gap 120 is ensured and the two disk bodies are used. Compatibility of keeping the 105 and 106 stable and parallel becomes easier.

As described above, according to the present invention, a toothed belt pulley is provided in which the manufacturing cost is reduced, the manufacturing time is shortened, the production efficiency can be improved, and the generation of the fluid sound and the rupture sound is prevented and the noise is reduced. It can provide, and the effect is profound.

On the other hand, although the 1st reference example, 2nd reference example, 1st Example, and 2nd Example of the toothed belt pulley 100 of this invention have two disk bodies 105 and 106, it is three sheets. It may have the above disk body.

And when the pulley 100 for toothed belts of this invention consists of three or more disk bodies, a clearance holder may be provided in the space | interval between all disk bodies, a clearance holder may be provided in a part, and a clearance maintenance is carried out. In the case of having two or more sieves, each of the gap holders may have the same shape or may have a different shape.

Further, the disc bodies 105 and 106 of the first reference example, the second reference example, the first embodiment, and the second embodiment of the toothed belt pulley 100 of the present invention have a simple disc shape. Only the outer periphery and the inner periphery fitted to the rotating shaft 104 may be made wider and the middle portion in the radial direction may be thinner, or the portion in which the thickness in the middle portion of the radial direction is subtracted may be formed. In such a case, when the teeth 101 of the two disc bodies 105 and 106 are engaged with the toothed belt 110, the space constituted by the gap 120 through which the compressed air is released and flowed in becomes larger, and Since it becomes a different shape, generation | occurrence | production of a fluid sound and a bursting sound can be prevented, and the effect that noise is reduced can further be increased.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the use form of the toothed belt pulley which is an Example of this invention.

2 is a front view and a sectional view of a first reference example of a pulley for toothed belt of the present invention.

3 is a front view and a sectional view of a second reference example of the pulley for toothed belt of the present invention.

4 is a front view and a sectional view of a first embodiment of a toothed belt pulley of the present invention.

5 is a front view and a sectional view of a second embodiment of a pulley for toothed belt of the present invention.

6 is a side view of a conventional use form of a pulley for a toothed belt.

7 is a front view of a conventional toothed belt pulley.

8 is a cross-sectional view of a conventional toothed belt pulley.

<Description of the symbols for the main parts of the drawings>

100, 500: Pulley for toothed belt

101, 501: toothed

502: incision

103, 503: tooth bottom

104: rotation axis

105: disc

106 disc

110, 510: toothed belt

120: gap

121: clearance holder

122: clearance holder

123: clearance holder

124: gap holder

Claims (3)

In the toothed belt pulley comprising a disc body having an inner circumference fitted to a rotating shaft and a tooth having an outer circumference engaged with a toothed belt. The disc body is divided into a plurality of parts in the rotational axis direction, The plurality of disk bodies are attached to each other by forming a gap in the rotation axis direction. The plurality of disk bodies are fitted to the rotating shaft with a gap holder defining the gap therebetween, The gap holder has an inner circumference fitted to the rotating shaft, and an outer circumference is formed in a non-circular shape. delete delete

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