Development of novel clutch utilizing self-locking mechanisms of belt

Imado, Keiji; Tominaga, Hiroki; Miura, Atsuyoshi; Yamaguchi, Yasuaki; Kawagoe, Tsuneo

doi:10.1016/j.triboint.2009.12.025

Cited by 7 publications

(9 citation statements)

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“…And self-locking was confirmed to occur under the condition as predicted by the theory. A clutch or coupling might be developed by using this self-locking property of belt [4].…”

Section: Discussionmentioning

confidence: 99%

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Study of Belt Friction with Three Times Wrapping Condition

Imado

Uesaka²,

Nakata

2013

Tribology Online

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Theoretical study was carried out to investigate the frictional property of belt wrapped three times around a circular shaft. A belt equation of fractional expression was derived. The self-locking mechanism was investigated theoretically by the equation. The discriminant of self-locking condition was clarified. The necessary conditions for self-locking are µ b < µ and sufficient wrapping angle of the belt, where µ is the coefficient of friction between the belt and shaft and µ b is the coefficient of friction between the belt and belt. According to the formula derived, self-locking occurs even under a realistic condition. It occurs when the ratio of belt tensions becomes 0 or negative. Providing the coefficient of friction µ and the ratio of the coefficients of friction κ = µ b /µ, some critical over-wrapping angles for self-locking were calculated numerically. Furthermore some normal force distributions in self-locking conditions were calculated theoretically.

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“…And self-locking was confirmed to occur under the condition as predicted by the theory. A clutch or coupling might be developed by using this self-locking property of belt [4].…”

Section: Discussionmentioning

confidence: 99%

“…The point P i (i = 1, 2, 3) is a boundary of contact. Belt tension is denoted by T i (i = 1, 2, 3, 4), i T ′ , i T ′′ and T 1 > T 4 . The axis x is taken so as to pass through the point P 2 .…”

Section: Introductionmentioning

confidence: 99%

Study of Belt Friction with Three Times Wrapping Condition

Imado

Uesaka²,

Nakata

2013

Tribology Online

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“…By using these equations, the self-locking condition of belt was clarified. A one way clutch utilizing the self-locking property of belt was devised [5]. The effectivenss of such a clutch was confirmed even in an off-centered condition [6].…”

Section: Introductionmentioning

confidence: 92%

Study of Euler’s Belt Formula

Imado

Otsu

2017

Tribology Online

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Euler's belt formula for a fixed circular drum is well known and is an important formula for mechanical engineers. However, there is little book in which belt equation for a drum of any contour is discussed precisely. This study was carried out to confirm the validity of the Euler's belt formula applied to a drum of any contour. The calculated result was verified to ascertain whether it satisfied the static equilibrium equations of the force and moment. The results perfectly satisfied the static equilibrium equations of the force. As for an equilibrium of the moment, it was found in the case of a belt wrapped around an elliptical drum that the moment from the belt tension was equal to the integrated moment caused by frictional force and normal force along wrapped length. Normal force distribution under a belt on a cylindrical surface was evaluated experimentally by a pressure sensitive film which was found to correspond qualitatively to the theory. As an example, an equation to calculate the normal pressure and tension of a belt wrapped on an elliptical drum was derived.

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“…Paying attention to the self-locking property of belt as described in the previous section, a novel clutch mechanism can be developed (Imado et al, 2010). Figure 18 shows a simplified three-dimensional image of the novel clutch.…”

Section: Novel Clutch Utilizing Self-locking Property Of Beltmentioning

confidence: 99%

“…The second purpose of this chapter is to present the frictional property of belt wrapped on an axis two and three times through deriving the formulas corresponding to an each condition. Making use of this self-locking property of belt, a belt-type one-way clutch can be made (Imado, 2010). The principle and fundamental property of this new clutch are described.…”

Section: Introductionmentioning

confidence: 99%

Frictional Property of Flexible Element

Imado¹

2011

New Tribological Ways

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Development of novel clutch utilizing self-locking mechanisms of belt

Cited by 7 publications

References 1 publication

Study of Belt Friction with Three Times Wrapping Condition

Study of Belt Friction with Three Times Wrapping Condition

Study of Euler’s Belt Formula

Frictional Property of Flexible Element

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Development of novel clutch utilizing self-locking mechanisms of belt

Cited by 7 publications

References 1 publication

Study of Belt Friction with Three Times Wrapping Condition

Study of Belt Friction with Three Times Wrapping Condition

Study of Euler&rsquo;s Belt Formula

Frictional Property of Flexible Element

Contact Info

Product

Resources

About

Study of Euler’s Belt Formula