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Operating device for control shaft for servo control of gearbox

A technology of operating device and servo control, applied in the direction of mechanical control device, transmission control, transmission parts, etc., can solve problems such as interruption and disconnection

Inactive Publication Date: 2018-12-07
FAB ITAL MAGNETI MARELLI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In operating devices of the type described above, after many years of use, it may occasionally happen that the end of the arm breaks off from the slit of the piston, thereby interrupting the function of the operating device and, consequently, the function of the servo-controlled gearbox

Method used

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  • Operating device for control shaft for servo control of gearbox
  • Operating device for control shaft for servo control of gearbox
  • Operating device for control shaft for servo control of gearbox

Examples

Experimental program
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Embodiment Construction

[0020] exist figure 1 , numeral 1 generally designates a servo-assisted transmission for a motor vehicle (not shown) driven by an internal combustion engine 2 provided with a drive shaft 3 .

[0021] The servo-controlled transmission 1 includes a servo-controlled dual-clutch gearbox 4 provided with a pair of main shafts 5 coaxial with each other, independent and inserted inside each other. Furthermore, the dual clutch gearbox 4 comprises two coaxial clutches 6 arranged in series, each clutch 6 being designed to connect the respective main shaft 5 to the drive shaft 3 of the internal combustion engine 2 . The dual clutch gearbox 4 includes a single layshaft 7 connected to a differential (not shown) which transmits motion to drive wheels (not shown).

[0022] The dual-clutch gearbox 4 shown in the accompanying drawings includes six forward gears (first gear I, second gear II, third gear III, fourth gear IV, fifth gear) indicated by Roman numerals. V and sixth gear VI) and reve...

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PUM

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Abstract

An operating device (14) for a control shaft (13) for servo control of a gearbox (4), wherein the control shaft (13) is moveable thus being convenient for axial translation along a longitudinal axis (15) and rotating about the longitudinal axis (15); the operating device (14) is provided with an arm (19) which is integral with the control shaft (13) and has an angular extent that is greater than amaximum rotation about the longitudinal axis (15) for the control shaft (13), and an actuator (17) which is provided with a piston (18) designed to be axially translated and mechanically connected tothe end portion of the arm (19) so as to transmit an axial translational movement along the longitudinal axis (15) to the arm (19), wherein the end portion of the arm (19) has an elongated through opening (20) which is traversed by the intermediate portion of the piston (18).

Description

[0001] priority claim [0002] This application claims priority from Italian Patent Application No. 102017000054752, filed May 19, 2017, the disclosure of which is incorporated herein by reference. technical field [0003] The invention relates to an operating device for servo-controlled control shafts of gearboxes, ie "semi-automatic transmissions". Background technique [0004] Servo-controlled transmissions are increasingly common in the market; they have a structure similar to conventional manual transmissions, except that the clutch pedal and gear selection lever, traditionally operated by the driver, are replaced by corresponding electric or hydraulic servo controls outside of the facts. When using a servo-controlled transmission, the driver only needs to send a command to the transmission control unit to shift gears to a higher gear or a lower gear, and the transmission control unit automatically shifts the control of the engine and servo associated with the clutch a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/32F16H57/023
CPCF16H57/023F16H63/32F16H61/30F16H2061/304F16H2061/307
Inventor M·洛伦佐尼N·蒙多
Owner FAB ITAL MAGNETI MARELLI SPA