Check patentability & draft patents in minutes with Patsnap Eureka AI!

Pulley structure

A pulley structure, locking mechanism technology, applied to belts/chains/gears, elements with teeth, hoisting devices, etc., can solve the problem of not seeing trapezoidal shapes, and achieve the effect of ensuring durability

Active Publication Date: 2018-12-21
MITSUBOSHI BELTING LTD
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Documents 2 and 3, it is stated that the cross-sectional shape of the coil spring is a rectangular (square) shape, but there is no mention of a trapezoidal shape (the reason and basis for its adoption)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pulley structure
  • Pulley structure
  • Pulley structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] The pulley structure of Example 1 has the same structure as the pulley structure 1 of the above-mentioned embodiment, and the spring steel wire of the coil spring (4) is an oil-tempered spring wire (based on JISG3560:1994). The spring steel wire is a trapezoidal wire, the axial length Ti of the inner diameter side is 3.8 mm, the axial length To of the outer diameter side is 3.6 mm, and the radial length W is 5.0 mm. The number of turns N of the helical spring (4) is 7 turns, and the winding direction is left-handed. The axial compression rate of the coil spring (4) is about 20%. The gap between the adjacent spring steel wires in the axial direction is 0.3 mm. ΔL (ΔL=N×(Ti-To) / 2) was 0.7 mm. Also, when using a spring steel wire with this cross-sectional shape, even if the number of turns of the coil spring is 9 turns (usually the maximum), the value of ΔL above becomes 0.9 mm, which is less than 1 mm. In addition, the wire inclination of the coil spring was 0.7°. Tha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a pulley structure (1) equipped with an outer rotating body (2), an inner rotating body (3), and a coil spring (4). The pulley structure (1) is characterized in that across section of the spring wire of the coil spring (4) along a direction running along the rotational axis and parallel to the rotational axis is a trapezoidal shape, the length Ti [mm] of an inner-diameter-side portion in the rotational axis direction in the cross section is greater than the length To [mm] of an outer-diameter-side portion in the rotational axis direction in the cross section,and when the number of windings of the coil spring (4) is N, an expression (1) that is N*(Ti-To) / 2 < 1 is satisfied.

Description

technical field [0001] The present invention relates to a pulley structure including a coil spring. Background technique [0002] In an auxiliary machine drive unit that drives an auxiliary machine such as an alternator with the power of an engine such as an automobile, a pulley connected to the drive shaft of the auxiliary machine such as the alternator and a pulley connected to the crankshaft of the engine are spanned A belt via which the torque of the engine is transmitted to the auxiliary machinery. In particular, for a pulley connected to a drive shaft of an alternator having a higher inertia than other auxiliary machines, pulley structures capable of absorbing rotation fluctuations of the crankshaft, for example, are used, for example, in Patent Documents 1 to 3. [0003] The pulley structures described in Patent Documents 1 to 3 are pulley structures including an outer rotator, an inner rotator disposed inside the outer rotator and capable of relative rotation relati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/36
CPCF16H55/36F16D41/206
Inventor 岛村隼人今井胜也团良祐
Owner MITSUBOSHI BELTING LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com