Apparatus for arranging oil pressure pump in motor-cycle

Claim 2

In an apparatus for arranging an oil pressure pump in a motor-cycle having mounted thereto an engine equipped with front and rear engine blocks projecting to the right and left from a vehicle frame and positioned so as to deviate from each other in the longitudinal direction of the vehicle frame, the improvement wherein said oil pressure pump is disposed at the rear of said front engine block which is offset, in the forward direction of the vehicle frame, said front engine block having an overhead cam shaft mounted thereon with its axis extending in the longitudinal direction of the vehicle frame, the rear end of said cam shaft being operatively connected to an operation portion of said oil pressure pump for power transmission therebetween.

Claim 3

The apparatus for arranging an oil pressure pump as defined in claim 1 wherein said oil pressure pump has a longitudinally elongated configuration including a pump portion in addition to said operation portion, said oil pressure pump is angled inwardly toward the center line of said engine from its operation portion connectd to said cam shaft.

Claim 4

The apparatus for arranging an oil pressure pump as defined in claim 2 wherein said front engine block is equipped with a seal housing disposed on the outer surface of the rear wall of said front engine block, said seal housing encompassing coaxially said rear end of said cam shaft, and with an oil seal for said cam shaft, fitted into said seal housing; said operation portion of the oil pressure pump is equipped with an eccentric cam to be placed inside a main body of said oil pressure pump at an inner end thereof and with a pump driving shaft having an outer end fixed to said cam shaft; said pump main body is equipped with an annular locating protuberance which is so protruded as to encompass coaxially said pump driving shaft and is fitted to said seal housing and with an oil seal of said pump driving shaft being fitted into said protuberance; and said pump main body is fixed to said front engine block by bolts.

Claim 5

The apparatus for arranging an oil pressure pump as defined in claim 2 or 3 wherein said pump portion of the oil pressure pump is equipped with a plunger which engages with said eccentric cam for reciprocating movement and the position of engagement of said plunger with said eccentric cam is deviated in the circumferential direction of said valve motion cam shaft with respect to the positions of engagement of said valve motion cam shaft with intake and exhaust rocker arms, respectively.

Claim 6

The apparatus for arranging an oil pressure pump as defined in claim 3 wherein said eccentric cam is an antifriction bearing fitted to an eccentric pin projecting from the rear end surface of said pump driving shaft.

Claim 7

The apparatus for arranging an oil pressure pump as defined in claim 2 wherein said pump main body of the oil pressure pump includes an oil reservoir chamber and a pump chamber that are separated from each other by a partition wall, and an outwardly opening filter chamber formed in the vicinity of said partition wall; said partition wall is provided therein with a first oil passage communicating said filter chamber with said oil reservoir chamber and with a second oil passage communicating said filter chamber with said pump chamber; an oil filter is disposed inside said filter chamber so as to separate said first and second oil passage from each other, said oil filter being held in place by a detachable cap for closing the opening of said filter chamber; and a suction valve is interposed in said second oil passage so as to allow the passage of an operation oil only undirectionally from said filter chamber to said pump chamber.