US 7,125,191 B2Granted

Power transmission device

AssigneeKabushiki Kaisha Toyota Jidoshokki

InventorsMasakazu Murase, Fuminobu Enokijima, Naoya Yokomachi, Tatsuya Koide

Life of this patent

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Abstract

A torque limiter to be operatively coupled to an engine is secured to the outer periphery of a driving shaft through screwing-engagement. The driving shaft and the torque limiter are screw-engaged and fixed to each other so that the torque limiter is pushed or urged against a seating face formed at the outer periphery of the driving shaft. The seating face abuts against the torque limiter restricting the screwing-movement of the driving shaft. Rotation force is transmitted between the driving shaft and the torque limiter via the seating face. A cylindrical member is disposed between the torque limiter and the seating face of the driving shaft. The cylindrical member is press-fitted and fixed to the outer periphery of the driving shaft, so that the power transmission between the driving shaft and the torque limiter is also performed through the press-fit portion between the cylindrical member and the driving shaft.

Claims11

Dependent claims

A power transmission device comprising:

a shaft capable of rotating around an axis;
and
a rotation body press-fitted and fixed to the shaft in a direction parallel to the axis of the shaft to rotate along with the shaft;
wherein the rotation body comprises a main body and a homogenous one-piece cylindrical member, wherein a drive source is connected with the main body,
wherein a press-fit surface of the shaft and the rotation body are in mutual contact,
wherein a press-fit surface of the cylindrical member that is an inner peripheral surface of the cylindrical member exerting a press-fit force on a press-fit surface of the shaft in a direction perpendicular to the axis of the shaft, the press-fit surface of the shaft being parallel to the axis of the shaft,
the shaft has a tapered seating face,
the cylindrical member is press-fitted to the seating face in the direction parallel to the axis of the shaft,
the shaft has a thread surface,
the main body has a thread surface,
the thread surface of the shaft being screw-engaged with the thread surface of the main body,
the main body and the cylindrical member are abutting on each other at their end surfaces in the direction parallel to the axis of the shaft,
the seating face is disposed between the press-fit surface and the thread surface of the shaft.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/200,926Filed 22 Jul 2002
Priority: JP P 2001-22151023 Jul 2001
Published: US 2003/0017909 A123 Jan 2003
Granted: 24 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16D 1/0858
With radial clamping between the mating surfaces of the hub and shaft: due to the elasticity of the hub
F16D 1/08
For attachment of a member on a shaft or on a shaft-end: with clamping hub; with hub and longitudinal key
F16D 9/06
Couplings with safety member for disconnecting, e.g. breaking or melting member: by breaking due to shear stress
F16B 2200/63
Constructional details of connections not covered for in other groups of this subclass: frangible connections