US 4,345,664 AGranted

Power transmission for two-wheeled vehicle

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsNobuo Anno, Haruki Okui, Kuniyuki Yamamoto, Kunio Miyazaki

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Abstract

A power transmission for a two-wheeled vehicle includes a variable-diameter drive pulley mechanism (2) mounted on a drive shaft (1) connected to an engine (E), a variable-diameter driven pulley mechanism (22) mounted on a driven shaft (18) operatively coupled with a driven wheel (W), and a clutch (36) mounted coaxially on the driven shaft (18) and operatively connected to the driven pulley mechanism (22). The drive and driven pulley mechanisms (2,22) are interconnected by a V-belt (7). The drive and driven pulley mechanisms (2,22) have axially movable members (5,24) located on opposite sides of the V-belt (7) adjacent to the engine (E) and the clutch (36) to allow parallel displacement of the V-belt (7) during the changing of the diameters of the pulley mechanisms (2,22), to prevent belt twisting or distortion and to prevent the belt (7) and pulley mechanisms (2,22) from being loaded while the vehicle is moved around with the engine (E) turned off.

Claims14

Dependent claims

A power transmission for a two-wheeled motorcycle, comprising:

(a) an engine (E);
(b) a drive shaft (1) driven by said engine (E);
(c) a variable-diameter drive pulley mechanism (2) connected to said drive shaft (1);
(d) a variable-diameter driven pulley mechanism (22);
(e) a V-belt (7) extending around said drive and driven pulley mechanisms (2, 22) for operative connection therebetween;
(f) clutch means (36) operatively connected with said driven pulley mechanism (22);
(g) a driven shaft (18) coaxially supporting said driven pulley mechanism (22) and said clutch means (36);
(h) a wheel (W) driven by said driven shaft (18), said wheel (W) being disposed on the same side of the power transmission mechanism as said engine (E);
(i) said drive pulley mechanism (2) including an axially movable member (5) and an axially fixed member (4), disposed on the side closest to said engine and on the opposite side with respect to said V-belt, respectively, said members (23, 24) supporting said V-belt therebetween;
(j) said driven pulley mechanism (22) including an axially movable member (24) and an axially fixed member (23), disposed on the side closest to said clutch means and on the opposite side with respect to said V-belt, respectively, said members (23, 24) supporting said V-belt therebetween;
and
(k) said clutch means comprising a centrifugal clutch including an outer member (37) connected to said driven shaft, and a drive plate (38) integrally connected to said driven pulley mechanism, said drive plate (38) including an element for frictionally engaging said outer member (37) upon actuation of said element under centrifugal forces.

9 more elements

A power transmission for a two-wheeled motorcycle provided with an engine and a drive shaft driven thereby, comprising:

a variable-diameter drive pulley mechanism connected to said drive shaft;
a variable-diameter driven pulley mechanism and a centrifugal clutch coaxially supported on a driven shaft for driving a wheel of said motorcycle;
a V-belt extending around said drive and driven pulley mechanisms so as to transmit power from said drive shaft, via said drive pulley mechanism, to said driven pulley mechanism;
said centrifugal clutch operatively cooperating with said driven pulley mechanism so as to be actuated by said driven pulley mechanism at or above a predetermined speed of rotation effected by said power transmitted from said drive shaft, to in turn drive said wheel via said driven shaft;
said power transmission being disposed on one and the same side of said engine and said wheel;
said drive pulley mechanism and said driven pulley mechanism each including an axially fixed member and an axially movable member, each said member including a conical surface which engages a side of said V-belt;
said axially movable member of said drive pulley mechanism being disposed closer to said engine than said axially fixed member of said drive pulley mechanism;
and
said axially fixed member of said driven pulley mechanism being disposed closer to said wheel and more remote from said clutch than said axially movable member of said driven pulley mechanism.

6 more elements

Dependencies are inferred from the claim text.