EP0139261A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Shift control mechanism of automotive manual transmission
Assignee: Nissan Motor Co Ltd
•
Filing: 1984-10-02
•
Granted: —
•
Expires: 2004-10-02
Abstract
Abstract Herein disclosed is an improved direction changing mechanism used in a shift control mechanism of a transverse manual transmission. The direction changing mechanism comprises a drive member movable together with the control rod; and at least one driven member movable together with the shift fork. The driven member is formed with a rectangular recess into which a head portion of the drive member is insertable under a certain condition so that upon selecting operation, the head portion of the drive member is put in the recess of the driven member and upon shifting operation, the head portion of the drive member abuts against one of the side walls of the recess thereby to move the driven member in a certain direction thereby completing a gear coupling. The head portion of the drive member is so sized and constructed that when the drive member assumes its rest or neutral position, the head portion is spacedly put in the recess without contacting the driven member, while, when the drive member assumes its operative position to complete the gear coupling, the head portion contact both the side walls of the recess.
Inventors
- 👤 Michihiro Okuda
- 👤 Kotei Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 23:07
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/08; F16H63/20; F16H63/30; F16H63/302; F16H2063/3083; F16H2063/3086; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/2014; Y10T74/20159
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
190 words
In a shift control mechanism of a manual transmission having a control rod which is movable in response to both selecting and shifting operations of a manual shift lever, and at least one shift fork which is movable to achieve a gear coupling, a direction changing mechanism comprising; a drive member movable together with said control rod; at least one driven member movable together with said shift fork, said driven member being formed with a recess into which said drive member is insertable under a certain condition so that upon the selecting operation, said drive member is put in said recess of the driven member, and upon the shifting operation, said drive member abuts against one of side walls of said recess thereby to move said driven member in a certain direction; and means for permitting, when said drive member assumes its rest or neutral position, said drive member to be spacedly put in said recess without contacting said driven member, and permitting, when said drive member assumes its operative position to complete a certain gear change operation, said drive member to contact both the side walls of said recess.
Claim 2
Dependent Claim
190 words
In a shift control mechanism of a manual transmission having a control rod which is movable in response to both selecting and shifting operations of a manual shift lever, and at least one shift fork which is movable to achieve a gear coupling, a direction changing mechanism comprising; a drive member movable together with said control rod; at least one driven member movable together with said shift fork, said driven member being formed with a recess into which said drive member is insertable under a certain condition so that upon the selecting operation, said drive member is put in said recess of the driven member, and upon the shifting operation, said drive member abuts against one of side walls of said recess thereby to move said driven member in a certain direction; and means for permitting, when said drive member assumes its rest or neutral position, said drive member to be spacedly put in said recess without contacting said driven member, and permitting, when said drive member assumes its operative position to complete a certain gear change operation, said drive member to contact both the side walls of said recess.
Claim 3
Dependent Claim
100 words
A direction changing mechanism as claimed in Claim 1, in which said recess of the driven member is rectangular in shape, and in which said means comprises an enlarged head portion formed on said drive member and practically insertable in said recess, said head portion being so sized and constructed that when said drive member assumes said rest or neutral position, said head member is spacedly put in said recess without contacting the side walls of said recess, and when said drive member assumes said operative condition, said head member contacts the side walls at its diametrically opposed two portions.
Claim 4
Dependent Claim
60 words
A direction changing mechanism as claimed in Claim 2, in which said side walls of the recess are parallel with each other, and in which said diametrically opposed two portions constitute part of a common imaginary spherical body, and in which the diameter of said spherical body is equal to the width of the rectangular recess of said driven member.
Claim 5
Dependent Claim
62 words
A direction changing mechanism as claimed in Claim 3,.in which said enlarged head portion comprises parallel flat side surfaces, cylindrical front and rear surfaces and a flat top surface which are arranged to form a boxy configuration, said cylindrical front and rear surfaces facing said parallel side walls of the recess under the rest or neutral condition . of said drive member.
Claim 6
Dependent Claim
76 words
A direction changing mechanism as claimed in Claim 4, in which said front and rear cylindrical surfaces meet said flat top surface at their respective ridge portions which are spherical in shape, and in which said front and rear cylindrical surfaces meet a reduced shank portion of said drive member at their respective joined portions which are spherical in shape, and in which the four spherical ridge portions constitute part of the common imaginary spherical body.
Claim 7
Dependent Claim
30 words
A direction changing mechanism as claimed in Claim 5, in which the thickness of said head portion is substantially equal to the thickness of said recess of the driven member.
Claim 8
Dependent Claim
37 words
A direction changing mechanism as claimed in Claim 6, in which at least one of said side walls of the recess is chamfered to promote smooth movement of said head portion during the selecting and shifting operations.
Claim 9
Dependent Claim
58 words
A direction changing mechanism as claimed in Claim 1, in which said drive member is secured to said control rod to move therewith, said control rod being rotatable about its axis in response to the selecting operation of the manual shift lever and slidable along the axis in response to the shifting operation of the manual shift lever.
Claim 10
Dependent Claim
50 words
A direction changing mechanism as claimed in Claim 8, in which said driven member is an arm portion of a generally L-shaped pivoting lever which has another arm portion which forms an articulated connection with an extension of said shift fork, said pivoting lever being pivotable about an fixed pin.
Claim 11
Dependent Claim
60 words
A direction changing mechanism as claimed in Claim 1, in which said drive member comprises a generally L-shaped pivoting lever which is slidably and rotatably mounted on a fixed shaft which extends perpendicular to the axis of said control rod, an end portion of said drive member forming an articulated connection with an shift arm secured to said control rod.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.