GB705419A - A pre-setting apparatus for operating change speed mechanism, particularly for vehicles - Google Patents
A pre-setting apparatus for operating change speed mechanism, particularly for vehiclesInfo
- Publication number
- GB705419A GB705419A GB15742/51A GB1574251A GB705419A GB 705419 A GB705419 A GB 705419A GB 15742/51 A GB15742/51 A GB 15742/51A GB 1574251 A GB1574251 A GB 1574251A GB 705419 A GB705419 A GB 705419A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- pedal
- engaged
- arm
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0274—Control units where shifting is directly initiated by the driver, e.g. semi-automatic transmissions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2708/00—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes
- F16H2708/24—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes with a preselection system, mainly semi-automatic, e.g. with automatic preselection, but controlled at the intended moment, with force amplification
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
705,419. Controlling change-speed gearing. MASSAROTTI, M. July 3, 1951 [May 21, 1951], No. 15742/51. Class 80 (2) Gears are automatically pre-selected by a speed-responsive governor (not shown) acting through rod 106 and lever 104 on a cam bar 10<SP>1</SP> slidable longitudinally on guide pins 100, the engaged gear is disengaged on depression of the clutch pedal 70<SP>1</SP> and the pre-selected gear is engaged on the return movement of the pedal. Cams on one side of bar 10<SP>1</SP> operate a spring- loaded lever 16<SP>1</SP> connected through balanced springs 132 and rod 128 to an arm 126 on a shaft carrying a gear quadrant 122 engaging rack teeth on a rotatable disc 50<SP>1</SP> secured on a shaft. In the different axial positions of the latter, an arm 24<SP>1</SP> thereon engages one or other of three gearchange rods 120. Cams on the other side of bar 10<SP>1</SP> operate a spring-loaded lever 28<SP>1</SP> connected through balanced springs. 136 and rod 134 to a member 34', the lower end of which is pivoted to one arm of a bell-crank lever 146, the other arm of which is connected, through a lost motion device 150, 154 and rod 58<SP>1</SP>, to the pedal 70<SP>1</SP>. The upper end of member 34<SP>1</SP> co-operates with a pair of stop pins 88<SP>1</SP>, and the member 34' has recesses 142, 144 co-operating with pins 11.2, 114 on disc 50<SP>1</SP>. A manual lever 78<SP>1</SP>, co-operating with a notch M' on the pivot hub of lever 104, is provided for positioning bar 10' for reverse, neutral and forward drive, bar 10<SP>1</SP> having pairs of cams for reverse, neutral and four forward speeds. Fig. 1 shows the gear set at neutral, by lever 78', with the pedal 70' depressed, while Fig. 3 shows the position of the parts with fourth speed both pre-selected and engaged. The lost-motion device, comprising balls 160, Fig. 5, in holes in the wall of a hollow cylinder 154 connected to lever 146 and co-operating with annular grooves 158, 156 in a fixed guide sleeve 150 and in rod 58<SP>1</SP> enables the clutch to be disengaged before lever 146 is moved anti-clockwise from the position of Fig. 3, thus moving member 34' downwards and causing disc 50<SP>1</SP> to turn clockwise, since recess 144 is engaged with pin 114. This turning of disc 50<SP>1</SP>, and hence of arm 24<SP>1</SP>, causes the engaged fourth gear to be disengaged, enabling arm 24' to make the pre-selected axial movement. On releasing pedal 70<SP>1</SP>, lever 146 moves back clockwise before the clutch is engaged, causing member 34' to be moved upwards and producing rotation of disc 50<SP>1</SP> in . the pre-selected direction. and hence the engagement of the automatically pre-selected gear. An auxiliary spring 162 acts on lever 146 in such a way that it is ineffective when the pedal 70' is fully depressed but augments the clutch springs when the pedal is released. The pedal may be operated automatically by a servomotor controlled by the pre-selecting means. Specification 668,951 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT705419X | 1951-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB705419A true GB705419A (en) | 1954-03-10 |
Family
ID=11314041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15742/51A Expired GB705419A (en) | 1951-05-21 | 1951-07-03 | A pre-setting apparatus for operating change speed mechanism, particularly for vehicles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB705419A (en) |
-
1951
- 1951-07-03 GB GB15742/51A patent/GB705419A/en not_active Expired
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