[특허]Anti-backlash nut, lead screw assembly and method

[미국특허] Anti-backlash nut, lead screw assembly and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16H-003/06
출원번호	US-0953270 (2007-12-10)
등록번호	US7992456 (2011-07-27)
발명자 / 주소	Schroeder, Jonathan R. Lyon, Gregory
출원인 / 주소	Pacific Bearing Company
대리인 / 주소	Reinhart Boerner Van Deuren P.C.
인용정보	피인용 횟수 : 8 인용 특허 : 23

초록 ▼

A nut for a lead screw assembly, a lead screw assembly and a method for preventing backlash in a lead screw assembly are provided. The nut of the lead screw assembly includes a one-way clutch that permits relative motion of between two nut bodies in a first direction but prevents relative motion in an opposite direction. The one-way clutch preferably includes at least one sprag element that acts between the two nut bodies to permit or prevent relative motion between the two nut bodies of the nut. The lead screw assembly generally incorporates a nut incorporating such a nut. The method generally includes binding the first nut body relative the second nut body to prevent relative motion of the nut bodies in one direction while permitting relative motion in an opposite direction.

대표청구항 ▼

What is claimed is: 1. An anti-backlash nut for engaging external threads of a lead screw, the nut comprising:first nut and second nut bodies, each nut body including threads for engaging the external threads, the first and second nut bodies moveable relative to each other along a linear axis; anda first sprag element operably acting between the first and second nut bodies, the first sprag element, in a first state, permitting movement of the first nut body relative to the second nut body in a first direction, and the first sprag element, in a second state, providing a locking action substantially preventing movement of the first nut body relative to the second nut body in a second direction, the second direction being opposite the first;wherein the first sprag element rotates from the first state to the second state in a first rotational direction and rotates from the second state to the first state in a second rotation direction, different than the first rotational direction;wherein the first nut body includes a first sprag engagement surface, and the first sprag element includes a first sprag surface engaging the first sprag engagement surface, the first sprag element, first nut body and second nut body configured such that the first sprag surface is permitted to slip relative to the first sprag engagement surface in the first state and configured such that the first sprag surface engages the first sprag engagement surface substantially without slip in the second state;wherein in the first state the first sprag element applies a first normal force to the first sprag engagement surface, and in the second state the first sprag element applies a second normal force to the first sprag engagement surface, the second normal force being greater than the first normal force;wherein the first nut body includes an upstanding wall extending generally parallel to the linear axis, the upstanding wall including the first sprag engagement surface;further comprising a second sprag element engaging a second sprag engagement surface of the upstanding wall formed on an opposite side of the upstanding wall as the first sprag engagement surface, wherein the first sprag element and first sprag engagement surface are symmetrically arranged about the linear axis relative to the second sprag element and second sprag engagement surface, respectively;wherein the first and second sprag elements are carried by the second nut body; andwherein the second body includes an opening for receipt of a portion of the first nut body, the opening including a keyway, and wherein the first and second sprag elements are carried within a pocket of the second nut body, the pocket extending through an outer diameter of the second nut body and opening into the keyway such that the first and second sprag elements extend into the keyway.

이 특허에 인용된 특허 (23) 인용/피인용 타임라인 분석

Erikson Keith W. ; Erikson Kenneth W., Adjustable preload anti-backlash nut.
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Erikson Kenneth W. (Merrimack NH) Erikson Keith W. (Nashua NH), Anti-backlash nut.
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Hosokai,Yutaka; Oodaira,Hiroki, Anti-backlash nut.
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Morales Victor H. (Westbury NY), Anti-backlash nut.
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Erikson ; Kenneth W. ; Erikson ; Keith W., Anti-backlash nut assembly.
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Erikson Keith W. ; Erikson Kenneth W., Anti-backlash nut assembly.
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Erikson Keith W. ; Erikson Kenneth W., Anti-backlash nut assembly.
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Kokinda Mark A. (11 Hidden Creek Cir. Pittsford NY 14534), Anti-backlash nut having a free floating insert for applying an axial force to a lead screw.
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Erikson Kenneth W. (Merrimack NH) Erikson Keith W. (Milford NH), Anti-backlash nut having longitudinal flexural members with ramps thereon and means to apply an axial pre-load force to.
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Erikson Kenneth W. (Merrimack NH) Erikson Keith W. (Nashua NH), Anti-backlash nut having longitudinal flexural members with ramps thereon and means to apply an axial pre-load force to.
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Erikson,Keith W.; Erikson,Kenneth W., Long-span lead screw assembly with anti-backlash nut.
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Erikson Keith W. ; Erikson Kenneth W., Longitudinal stabilizer for vibration reducing bushing.
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Erikson Keith W. ; Erikson Kenneth W., Miniature anti-backlash nut assembly.
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Erikson Keith W. (Hollis NH) Erikson Kenneth W. (Amherst NH), Reinforced anti-backlash nut.
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Erikson Kenneth W. ; Erikson Keith W., Reinforced anti-backlash nut with graduated thread depth fingers.
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Erikson Keith W. ; Erikson Kenneth W., Reinforced lead screw.
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Erikson Keith W. ; Erikson Kenneth W., Reinforced lead screw with anti-backlash nut.
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Keith W. Erikson ; Kenneth W. Erikson, Reinforced lead screw with anti-backlash nut.
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Keith W. Erikson ; Kenneth W. Erikson, Reinforced lead screw with spring biased anti-backlash nut.
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Keith W. Erikson ; Kenneth W. Erikson, Reinforced lead screw with springless anti-backlash nut.
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Erikson Kenneth W. ; Erikson Keith, Spring bias wedge in reinforcing rail.
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Erikson Keith W. ; Erikson Kenneth W., Treating metallic machine parts.
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Erikson Keith W. (Hollis NH) Erikson Kenneth W. (Amherst NH), Vibration reducing brushing.
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이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

Stensgaard, Per, Actuator.
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Kahnert, Christopher A., Anti-backlash nut assembly.
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Schroeder, Robert; Schroeder, Jonathan R.; Binka, Joseph A.; Ross, Paul D., Floating nut and carriage assembly.
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Schroeder, Robert; Schroeder, Jonathan R., Inverted spline rail system.
상세보기
Schroeder, Jonathan R.; Binka, Joseph A.; LeCrone, Timothy J., Linear slide having integral carriage and nut assembly.
상세보기
Cronin, Patrick M.; Margolin, Alexander; Nook, Jr., Joseph H., No-lash nut assembly.
상세보기
Schroeder, Robert; Schroeder, Jonathan R., Nut with flexible fingers and radial compression members.
상세보기
Oberle, Hans-Juergen; Lienig, Andreas, Threaded spindle adjusting drive.
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A	생활필수품
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[미국특허] Anti-backlash nut, lead screw assembly and method 원문보기

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[미국특허] Anti-backlash nut, lead screw assembly and method 원문보기

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이 특허에 인용된 특허 (23) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

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