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pulley

A pulley, wheel hub technology, applied in the direction of belt/chain/gear, hoisting device, elements with teeth, etc., can solve the problems of affecting the service life of resin pulley, large deformation, loss of working ability of resin pulley, etc. The effect of light weight, low cost and not easy to deform

Active Publication Date: 2021-02-05
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially at the outer rope groove position shown by the arrow P, since there is no support of the wheel wall 102d, the amount of deformation will be larger
[0006] The above technical problems will cause the resin pulley to lose its normal working ability quickly and seriously affect the service life of the resin pulley

Method used

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Examples

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no. 1 Embodiment ＞

[0022] figure 1 It is a schematic diagram schematically showing the first embodiment of the pulley of the present invention. figure 1 Consists of 3 graphs. The left side is a front view of the pulley 100, and the upper right side is a sectional view of the A-A section. The pulley 100 includes a pulley body 102 and a hubcap 110 . The pulley body 102 has a rim 102a, a hub 102b, spokes 102c, and a wheel wall 102d, all of which are made of resin. The pulley body 102 can be integrally formed, for example, by injection molding or other methods. The inner side of the hub 102b is provided with a circular shaft hole for setting a bearing and a rotating shaft.

[0023] The hubcap 110 is made of a metal material. figure 1 The lower right figure in is a perspective view of the hubcap 110. The hubcap 110 includes a circular ring portion 110a and an end portion 110b. Such as figure 1 As shown in the sectional view of , two hubcaps 110 are sheathed on the outer periphery of the h...

no. 2 Embodiment ＞

[0029] image 3 It is a schematic diagram briefly showing the second embodiment of the pulley of the present invention. image 3 Consists of 3 graphs. The left side is a front view of the pulley 200, and the upper right side is a sectional view of the B-B section. The pulley 200 includes a pulley body 102 and a rim support plate 210 . The pulley body 102 is the same as that described in the first embodiment, and will not be repeated here.

[0030] The rim support plate 210 is made of a metal material. image 3 The lower right figure in is a perspective view of the rim support plate 210. The rim support plate 210 includes a planar portion 210a and a rib 210b. The shape of the rim supporting plate 210 is equivalent to a circular plate provided with a plurality of reinforcing ribs 210b in the radial direction, and a circular hole in the center thereof can be matched with the outer circumference of the hub 102b.

[0031] Such as image 3 As shown in the sectional view, two ...

no. 3 Embodiment ＞

[0035] Figure 4 It is a schematic diagram briefly showing the third embodiment of the pulley of the present invention. Figure 4 Consists of 2 graphs. On the left is a front view of pulley 300, and on the right is a sectional view of section C-C. This embodiment is a modified example of the first embodiment and the second embodiment, and is a combination of the technical features of the first embodiment and the technical features of the second embodiment.

[0036] The pulley 300 includes a pulley body 102 , a hubcap 110 and a rim support plate 210 . The basic features of the pulley body 102 , the hubcap 110 and the rim support plate 210 are substantially the same as those described in the first embodiment and the second embodiment, and will not be described in detail here. The hub cover 110 is sheathed on the outer circumference of the hub 102b to limit the expansion of the hub 102b towards the outer circumference, and its effect is the same as that described in the first ...

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Abstract

The present invention relates to a pulley (100) having a rim (102a), a hub (102b), and spokes (102c) made of resin. The pulley includes: a metal hub cap (110) sheathed on the outer circumference of the hub to limit the expansion of the hub to the outer circumference. When the temperature rises or the water-absorbing resin hub expands, the hub cap will restrict the expansion of the hub to the outer circumference, causing the resin hub to expand mainly inward, so as to avoid the loss of good fit between the pulley and the bearing due to the increase in the inner hole diameter of the expansion hub , resulting in relative sliding, causing severe wear and reducing the life of the pulley.

Description

technical field [0001] The present invention relates to pulleys. Background technique [0002] For example, the pulley disclosed in Japanese Patent Laid-Open No. 2008-275108, pulleys made of resin are widely used in various devices at present. Compared with metal pulleys, resin pulleys have the advantages of light weight and low cost. However, there are some technical issues with using resin pulleys. Here, by means of Figure 5 Explain these technical issues. [0003] Figure 5 The shown resin pulley 400 is mainly composed of a rim 102a, a hub 102b, a spoke 102c, a wheel wall 102d and the like. Such as Figure 5 As shown in the sectional view on the right, four rope grooves are provided on the rim 102a of the pulley 400, and four ropes 430 can be hung thereon. The assembly between the pulley 400 and the metal bearing 420 is generally realized by inserting the bearing 420 into the inner side of the hub 102b by way of interference fit. When the temperature of the use envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/32
CPCF16H55/32
Inventor 野泽勇贵安部贵
Owner HITACHI LTD
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