WO2005088172A1 - Systeme pour realiser un changement de vitesse - Google Patents

Systeme pour realiser un changement de vitesse Download PDF

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Publication number
WO2005088172A1
WO2005088172A1 PCT/NO2005/000084 NO2005000084W WO2005088172A1 WO 2005088172 A1 WO2005088172 A1 WO 2005088172A1 NO 2005000084 W NO2005000084 W NO 2005000084W WO 2005088172 A1 WO2005088172 A1 WO 2005088172A1
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WO
WIPO (PCT)
Prior art keywords
shift
locking
shift fork
shift shaft
shaft
Prior art date
Application number
PCT/NO2005/000084
Other languages
English (en)
Inventor
Sven BJØRKGÅRD
Original Assignee
Kongsberg Automotive Asa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kongsberg Automotive Asa filed Critical Kongsberg Automotive Asa
Publication of WO2005088172A1 publication Critical patent/WO2005088172A1/fr

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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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • F16H2063/305—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force using electromagnetic solenoids
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H2063/3079—Shift rod assembly, e.g. supporting, assembly or manufacturing of shift rails or rods; Special details thereof
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F16H2063/321—Gear shift yokes, e.g. shift forks characterised by the interface between fork body and shift rod, e.g. fixing means, bushes, cams or pins
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/04—Ratio selector apparatus
    • F16H59/044—Ratio selector apparatus consisting of electrical switches or sensors
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/36—Generation or transmission of movements for final actuating mechanisms with at least one movement being transmitted by a cable
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms

Definitions

  • the present invention relates to a system for shifting gears according to the introduction, to the independent patent claims in the set of claims.
  • the invention will preferably be employed in vehicles of different types, but may also be applied within other technical fields where it is desirable to undertake a shift between different gear ratios.
  • Other vehicles such as ships, small boats etc. may be briefly mentioned here.
  • each shift shaft is provided with a shift fork, each of which is connected to a shift sleeve in order to perform a gearshift.
  • the shift fork together with its shift sleeve may be moved between different positions for shifting between different gear ratios and possibly the neutral position.
  • the shift shaft connected with the desired gear ratio is engaged.
  • the shift shaft is then moved in its longitudinal direction for shifting to a new gear ratio.
  • gearbox Since several shift shafts are presumably included in the gearbox, the gearbox will be relatively large and require a great deal of space, its construction will be relatively complex and the gearbox will be expensive. This applies particularly in cases where gearbox solutions have many gears, for example where the gearbox has six different gear ratios in addition to reverse gear. In this case the gearbox may contain as many as four different shift shafts; a shift fork for each gear pair together with a shift fork for reverse gear. Such a gearbox requires a lot of space and in addition has an extensive construction with many different parts that have to fit together and be moved relative to one another.
  • a starting point for making the gearbox simpler and smaller is to reduce the number of components by using only one shift shaft in the gearbox.
  • the principle of using a shift shaft is per se previously known.
  • the shift fork 10 designed to engage with a projecting portion belonging to the shift fork that requires to be selected. After selection of a shift fork, the shift fork is moved into engagement with the shift sleeve in the axial direction on the shaft for selection of gear ratio.
  • the shift forks' common shaft acts only as a guide for the shift forks' movement, the actual shift movement being initiated by
  • US 573147 and EP 131720 are focused on the methodology of attaching shift forks one by one to the shift shaft. Neither in US 573147 nor in EP 131720 is any solution indicated as to how gear selection performed by a gear lever or an automatic gear selection device (data processing device) should be communicated
  • the object of the invention is therefore to provide a gearshift system that includes a gearbox, which has a simpler construction compared to conventional gearboxes. By reducing the number of components in the gearbox and achieving a more efficient assembly of the gearbox parts, a more compact gearbox is provided, which will also be less expensive than the gearboxes currently on offer. A further object of the
  • a gear lever is connected to the gearbox. It will be possible, however, to use the invention in a context where gear selection is performed automatically or semi-automatically. It is also possible to employ other operating devices than a gear lever for gearshift, . for example a joystick, a sensor device such as a switch, for example a push-button or the like. There are many options here when choosing an operating device, and the essential features are that the operating device should be user-friendly and the user's settings transferable, and possibly translatable, for controlling the gearbox.
  • the system according to the invention as indicated in the independent patent claim 1 can be used for systems where the gear lever can be moved in different gear path patterns. Mention may be made here of a sequential gear, which for example is used on motorcycles, where the gear lever is moved in a rectilinear motion. Furthermore, the gear path pattern is in the form of an H, where the gear's neutral position is located on the H's horizontal leg, and gearshift is initiated by positioning the gear lever in one of the two ends of the H. A gear path pattern in the form of a double H may also be possible. For both H and double H there may an extra tail for selection of reverse gear or for selection of reverse gear and a fifth gear, as is normally the case for gear levers used in passenger cars. A gear lever that follows a simple H- shaped gear path pattern, but which in addition has the functions "split" and "range” is widely used in lorries.
  • the system for implementing a gearshift according to the independent patent claim 1 may comprise a gearbox and a gear lever that are directly or indirectly interconnected, where the gear lever's movements are communicated to the gearbox.
  • the gearbox may be operated by activating a sensor device such as a switch, with one or more switches mounted ' in the vehicle's cabin so as to be easily accessible for the driver.
  • the gearbox is provided with a shift shaft equipped with two or more shift forks, each of which is engaged with a shift sleeve, where the shift fork moves the shift sleeve between different positions for shifting between different gear ratios and possible neutral position.
  • the gear lever operates the gearbox, the gear lever being movable forwards and backwards between different positions in a gear path pattern comprising a first direction of travel where the relevant shift fork is selected and locked to the shift shaft, and a second direction of travel for shifting between the different gear ratios, where movement of the gear lever in the second direction of travel involves movement of the shift fork and subsequent shifting to a new gear ratio.
  • a gear lever for implementing a sequential gearing, which is only movable in the second direction.
  • one or more driver-operated switches such as push-buttons or the like are employed for selecting a shift fork. These switches may, for example, be mounted on the gear lever.
  • each shift fork is separately attached to the shift shaft and equipped with a controllable locking device. Movement of the gear lever between the different positions in the first direction or activation of the sensor devices/switches initiates locking of one of the shift forks and unlocking of the remaining shift fork(s).
  • Each shift fork may thereby be guided alternately between a first position where the shift fork is locked to the shift shaft, thereby following the shift shaft's movement, and a second position where the shift fork is not locked to the shift shaft and the shift shaft can be moved relative to the shift fork(s).
  • gear lever When a gear lever is employed for operating the gearbox, the gear lever according to conventional technology may be directly coupled to the shift shaft, preferably by the gear lever's lower end being coupled to the shift shaft. Alternatively, the gear lever may be connected to the shift shaft by a transmission, with the result that the gear lever's movement or change of position is transmitted as a signal or as a power transmission, preferably by means of a pneumatic or hydraulic fluid transmission, cables or as a purely mechanical transmission.
  • movement of the gear lever between the different positions in the first direction initiates locking of one of the shift forks and unlocking of the remaining shift fork(s) by means of the controllable locking devices.
  • locking of the relevant shift fork may be performed by operating a switch (for example a push-button) for selecting the shift fork.
  • the switches can be placed on the gear lever.
  • the relevant shift fork is selected by means of movement of the gear lever in the first direction or by operating the switches.
  • the movement of the gear lever forwards or backwards in the first direction is therefore a possibility for selecting which shift fork is to be locked to the shift shaft.
  • this first direction will preferably be a direction that is oriented across the vehicle's longitudinal direction, i.e. a transverse direction extending from one side of the vehicle to the other. If the gear path pattern is H-formed, this means that movement in the first direction is movement along the H's horizontal leg.
  • the movement of the gear lever in the first direction or information on which of theenfin driver-operated sensor devices/switches are activated can be transmitted to the locking devices on the different shift forks in various ways.
  • One or more sensors may be employed, located close to or distant from the gear lever for registering the gear lever's movement.
  • the sensor device or the sensor may be a pressure sensor, a mechanical switch, an optical switch such as a photocell, or another suitable sensor.
  • the sensor information may be transmitted to the shift fork's locking device in various ways and will be transmitted directly or converted depending on the design of the locking devices' signal or data receivers.
  • the transmission may be conducted in various ways. One possibility is transmission- via cables as an electrical or optical signal.
  • the transmission may be conducted by using a system of pipes and cylinders with a pneumatic or hydraulic working medium, where the system is controlled by mechanically or electrically operated valves, which receive signals from the sensors.
  • the gear lever may also operate the valves directly without the use of sensors.
  • a more direct transmission may also be envisaged where sensors are not necessarily employed, but where movement of the gear lever is transmitted directly by means of a mechanical transmission, transmission by means of cables, etc.
  • a computer for communication between the gear lever, or other gear-operating unit if this is used, and the shift forks' locking device. If the gear solution is automatic and no gear-operating unit is employed, a control unit such as a computer may be used for controlling which locking devices are to be locked or unlocked.
  • movement of the gear lever in the second direction which in the case of the invention is used in a vehicle, will mean movement of the gear lever in a direction coincident with the vehicle's longitudinal direction extending from the vehicle's front end to the vehicle's rear end. If the gear path pattern is H-shaped, this means that movement in the second direction is movement along the H's vertical leg. Movement in this second direction entails movement of the shift fork in its longitudinal direction and subsequent shifting of the gear ratio.
  • the invention also comprises a system for implementing a gearshift for use together with other selection or operating devices than a gear lever, such as an automatic or semi-automatic solution, or possibly the use of an actuator for selection of a shift fork and shifting thereof.
  • This system also comprises a conventional per se gearbox, which is provided with a shift shaft equipped with two or more shift forks, each of which is engaged with a shift sleeve.
  • the shift fork moves the shift sleeve between different positions for shifting between different gear ratios, this being carried out by the shift shaft being moved in the shift shaft's longitudinal direction.
  • the system further comprises a data processing unit, which selects the appropriate gear ratio.
  • the data processing unit can determine or select the appropriate gear ratio on the basis of various types of incoming parameters.
  • the selected gear ratio can be communicated directly to the gearbox and/or to a control unit which in turn controls the gearbox.
  • Each shift fork is separately attached to the shift shaft and equipped with a controllable locking device.
  • each shift fork can be guided alternately between a first position where the shift fork is locked to the shift shaft and thereby follows the shift shaft's movement, and a second position where the shift fork is not locked to the shift shaft and the shift shaft can be moved relative to the shift fork(s).
  • One shift fork at a time is thereby locked to the shift shaft while the rest are not locked and on movement of the shift shaft, the shift fork that is locked to the shift shaft causes a shift to a new gear ratio.
  • Each shift fork is provided with a mounting portion with a through-going bore, the shift shaft being passed through the bore(s).
  • the shift shaft is provided with an opening and the mounting portion is provided with an opening.
  • the shift fork's locking device comprises a locking pin that causes the shift fork to be locked to the shift shaft by a portion of the locking pin being received in the shift shaft's opening and a portion in the mounting portion's opening.
  • the locking pin is located in the shift shaft's opening or in the mounting portion's opening.
  • the shift shaft's opening may be through-going in the shift shaft's diametrical direction, preferably with a length that at least corresponds to the shift shaft's diameter.
  • the shift fork's mounting portion is provided with a locking groove for receiving a portion of the locking pin when the shift fork has to be locked to the shift shaft.
  • the locking pin may be positioned in such a fashion that the locking pin protrudes through the shift shaft's through-going opening and is received in the locking groove or both in the locking groove and the mounting portion's opening, when the shift fork is locked to the shift shaft.
  • the mounting portion's opening may be in the form of a through-going opening through the mounting portion's material thickness, whereby it can be positioned over the shift shaft's through-going opening and aligned therewith.
  • the locking pin may be of such a length that in the shift fork's locked position, the locking pin extends through the mounting portion's through-going opening and the shift shaft's through-going opening, possibly to be received in the mounting portion's locking groove.
  • the locking device may comprise a locking- initiating device that extends through the mounting portion's through-going opening to abut against the locking pin, where the locking pin may be adapted to be received in the mounting portion's locking groove.
  • the locking pin When using a locking-initiating device, the locking pin will have a shorter length, preferably corresponding to the shift shaft's diameter. In a preferred embodiment of this solution the locking pin is received in the shift shaft's through-going opening when the shift fork is not locked. The locking-initiating device moves the locking pin in the through-going opening so that a portion of the locking pin is received in the locking groove.
  • a spring- loaded return device mounted in the locking groove may be employed, which causes the locking pin to be returned when the shift fork is unlocked.
  • the individual shift fork's locking device is provided in a controllable form that enables it to alternate between a state where the shift fork is locked and a state where the shift fork is unlocked.
  • the control of the individual shift fork may be conducted in various ways, but one way of doing this is to use an activating element provided on the shift fork's mounting portion.
  • activation of the element causes locking of the shift fork to the shift shaft, while deactivation of the element causes unlocking of the shift fork.
  • this method of controlling the locking device is used together with the aforementioned embodiment of the locking device where the mounting portion is provided with a locking groove, the invention works in the following manner: on activation the locking-initiating device or the locking pin is moved through the mounting portion's through-going opening and the locking pin is moved in the shift shaft's through-going opening, with the result that a portion of the locking pin is received in the locking groove and the shift fork is locked. During unlocking the parts are withdrawn.
  • This locking principle can be implemented in many ways, but in an embodiment the locking-initiating device or the locking pin is prestressed by means of a spring. Deactivation of the activating element causes the locking pin to be withdrawn from the locking groove by means of the spring's pre- tensioning force.
  • activation of the activating element causes unlocking of the shift fork, while deactivation of the element causes locking of the shift fork.
  • the locking-initiating device or the locking pin is similarly withdrawn through the mounting portion's through-going opening, and the locking pin is moved in the shift shaft so that a portion of the locking pin is removed from the locking groove and the shift fork is unlocked.
  • the parts are moved so that the locking pin is inserted in the locking grove as has also been described earlier.
  • This locking principle can be implemented in many ways, but in an embodiment the locking-initiating device or the locking pin is held in a locked position by a spring.
  • the activating element is composed of a solenoid.
  • the solenoid's movable core is magnetic and constitutes the locking pin or the locking- initiating device.
  • the coil also encircles the core.
  • the solenoid When current is supplied to the solenoid, the solenoid is activated, thereby causing the shift fork to be locked to the shift shaft, or unlocked depending on which locking principle is chosen.
  • the solenoid may, for example, be single-acting with spring return or double-acting without a spring.
  • the activating element may also be in the form of a cylinder with a piston, which for example is pneumatically or hydraulically controlled, where a portion of the piston constitutes the locking pin or the locking-initiating device.
  • the shift forks on one and the same shift shaft may be equipped with the same or different types of locking mechanism.
  • the above-mentioned examples of different locking principles for the locking mechanism and the different activating elements may therefore be employed according to the wishes of the skilled person for the different shift forks.
  • the combination is arranged in such a manner that at least one shift fork is locked to the shift shaft when the solenoid is not powered.
  • the solenoid can be arranged in such a manner that the current is broken when the locking pin/the core reaches its end position. This is to prevent the solenoid from being powered when no gearing is taking place.
  • the activating element can be provided as a separate unit on the shift fork's mounting portion or the activating element can be provided as an integrated part of the mounting portion.
  • the activating element may alternatively be comprised of an actuator, which may be controlled by a control signal generated from a computer as a result of the gear lever's movement in the first direction or in another way.
  • Fig. 1 illustrates an embodiment of the system according to the invention.
  • Fig. 2 illustrates a second embodiment of the system according to the invention.
  • Figs. 3-5 illustrate alternative embodiments of the shift forks' locking mechanisms and activating elements.
  • Fig. 6 illustrates an embodiment of the system where gears are selected automatically.
  • Fig. 7 illustrates an alternative embodiment of the gear lever.
  • a system is illustrated where a gear lever 1 is shown in direct engagement with a shift shaft 2.
  • the shift shaft 2 is here equipped with two shift forks 3, 4, each of which is engaged with a shift sleeve (not shown) for shifting between different gear ratios.
  • the number of shift forks may vary.
  • Each shift fork has a mounting portion 3 a, 4a with a through-going bore 3b, 4b, through which the shift shaft 2 is passed and each shift fork can be locked separately to the shift shaft.
  • the gear lever 1 can be moved in a first direction for selection of a shift fork, the first direction of travel being illustrated by arrow 5, and a second direction for shifting gear ratio, the second direction of travel being illustrated by arrow 6. In the illustrated embodiment these are oriented 90° to each other.
  • Movement of the gear lever 1 forwards and backwards in the first direction is registered by the sensors 7 and 8 respectively.
  • the gear lever 1 When the gear lever 1 is moved in the direction of the sensor 7, this is registered by the sensor 7, which transmits a signal to the shift fork 4, which is locked to the shift shaft 2. Only one shift fork at a time can be locked to the shaft, and the movement of the gear lever 1 in the direction of the sensor 7 causes the shift fork 3 to be unlocked.
  • the unlocking of the shift fork 3 may be performed either by no signal being transmitted to the shift fork 3 or by an unlocking signal being transmitted to the shift fork 3 due to information from sensor 8.
  • the sensors are arranged at the gear lever in such a manner that the associated sensors are activated within the area of the first direction 5 corresponding to the selection of the respective shift fork.
  • gear ratio can be selected by the gear lever 1 being moved in the second direction 6.
  • gear lever 1 On movement of the gear lever 1 in the second direction 6, the shift shaft 2 is moved in its longitudinal direction.
  • the locked shift fork is moved, while the unlocked shift fork is at rest, and a shift of gear ratio is implemented.
  • Figure 2 illustrates the same set-up as in figure 1 , but here the connection between the shift shaft 2 and the gear lever 1 is established by a cable 9.
  • the other components are the same as in figure 1 and are indicated by the same reference numerals.
  • FIG 3 is a sectional view through a shift fork 4 illustrating an example of a method of controlling the locking of the shift fork 4 to the shift shaft 2.
  • the shift shaft 2 is illustrated here with a through-going opening 2a.
  • the mounting portion 4a is provided with a locking groove 10 and a through-going opening 11.
  • an activating element 12 in the form of a solenoid where the solenoid's core acts as a locking pin 13a.
  • the solenoid's coil is indicated by 14.
  • FIG 4 a second embodiment is illustrated of the shift fork's 4 locking device and of the solenoid.
  • the locking pin is designed as illustrated by 13b, and the component 13a which in the example in figure 3 acted as a locking pin acts as a locking- initiating device 15 in the embodiment in figure 4.
  • a spring 18 is illustrated arranged round the locking-initiating device 15.
  • a return device 16 which is prestressed by a spring 17.
  • the springs 17 and 18 hold the locking-initiating device 15 and the locking pin 13b in a position where the shift fork is not locked to the shift shaft 2.
  • a magnetic field is established in coil 14 with a force and direction that overcome the force from the spring 17 and 18.
  • the locking-initiating device 15 is thereby pushed downwards towards the locking pin 13b, which is moved downwards and received in the locking groove 10.
  • the shift fork 4 is thereby locked to the shift shaft 2.
  • the shift fork 4 is unlocked from the shift shaft 2 by removal of the magnetic field, for example by cutting off the signal input and thereby the power supply to the solenoid.
  • the locking-initiating device 15 and the locking pin 13b are then returned to the position illustrated in figure 4.
  • Figure 6 illustrates an example of a set-up of the system where a gearshift takes place automatically.
  • a data processing unit 20 selects the appropriate gear ratio. Based on the selected gear ratio the data processing unit 20 transmits a signal concerning selection of one of the shift forks 3 or 4. The shift fork concerned is locked to the shift shaft 2.
  • a gearshift actuator 21, which is connected to the shift shaft and communicates with the data processing unit 20 then ensures that the shift shaft is moved in the longitudinal direction for selection of a new gear ratio.
  • Figure 7 illustrates an alternative embodiment of a gear lever 30 for selecting a shift fork according to the invention.
  • the gear lever 30 is only movable in the second direction and as an alternative to movement of the gear lever 30 in the first direction of travel for gear selection, one or more driver-operated sensor devices, illustrated here as push-buttons 31, are employed for selecting a shift fork as illustrated in the figure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Control Of Transmission Device (AREA)

Abstract

La présente invention concerne un système pour réaliser un changement de vitesse, comprenant une boîte de vitesses comprenant un axe de changement de vitesse qui comprend une ou plusieurs fourchettes de changement de vitesse, et un levier de vitesses. Le levier de vitesses peut se déplacer dans une première direction pour sélectionner une fourchette de changement de vitesse, ou un ou plusieurs dispositifs de détection permettant la sélection directe d'une fourchette de changement de vitesse, sont compris dans le système. Le levier de vitesses peut se déplacer dans une seconde direction pour permettre le passage entre différents rapports de vitesse. Chaque fourchette de changement de vitesse est équipée d'un dispositif de verrouillage, et peut être guidée de façon alternée entre une première position dans laquelle la fourchette est verrouillée sur l'axe de changement de vitesse, et une seconde position dans laquelle la fourchette de changement de vitesse n'est pas verrouillée sur l'axe de changement de vitesse. Une seule fourchette de changement de vitesse à la fois est verrouillée sur l'axe de changement de vitesse, alors que les autres ne sont pas verrouillées. L'invention a également pour objet un système qui est commandé par une unité de traitement de données.
PCT/NO2005/000084 2004-03-12 2005-03-07 Systeme pour realiser un changement de vitesse WO2005088172A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400621A SE0400621L (sv) 2004-03-12 2004-03-12 System för att utföra växling
SE0400621-9 2004-03-12

Publications (1)

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WO2005088172A1 true WO2005088172A1 (fr) 2005-09-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000600A3 (fr) * 2006-06-30 2008-05-08 Zahnradfabrik Friedrichshafen Dispositif de changement de vitesses pour boîte de vitesses
DE102007024364A1 (de) * 2007-05-24 2008-11-27 Zf Friedrichshafen Ag Schalteinrichtung eines mehrstufigen Fahrzeuggetriebes
FR2992042A1 (fr) * 2012-06-18 2013-12-20 Peugeot Citroen Automobiles Sa Systeme d'actionnement de changement de rapport pour une boite de vitesses
WO2016000891A1 (fr) * 2014-07-02 2016-01-07 Zf Friedrichshafen Ag Actionneur de changement de rapport, boîte de vitesses et procédé pour faire fonctionner un actionneur de changement de rapport
CN105546109A (zh) * 2016-01-22 2016-05-04 安徽江淮汽车股份有限公司 一种带互锁结构的拨叉轴
WO2023232259A1 (fr) 2022-06-02 2023-12-07 Volvo Truck Corporation Dispositif de changement de vitesse, transmission et procédé d'assemblage de transmission

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US573147A (en) 1896-12-15 Head-rest
US1283561A (en) * 1917-09-07 1918-11-05 Bayard E Richardson Gear-shifting mechanism.
GB1158829A (en) * 1967-08-04 1969-07-23 Ifa Getriebewerke Brandenburg Shift Mechanism for Overdrive Arrangements
GB1186791A (en) * 1968-01-18 1970-04-02 Vauxhall Motors Ltd Change-Speed Gear Mechanisms
US3929029A (en) 1974-02-25 1975-12-30 Borg Warner Transmission shift control linkage
EP0131720A1 (fr) 1983-06-17 1985-01-23 IVECO FIAT S.p.A. Dispositif de sélection et d'engagement des vitesses pour une transmission de véhicule à moteur
EP0371159A1 (fr) * 1988-11-28 1990-06-06 Csepel Autogyár Commande électropneumatique pour changement de vitesses à distance, en particulier pour changer les vitesses d'une transmission mécanique synchronisée d'automobiles
JPH02217663A (ja) * 1989-02-20 1990-08-30 Diesel Kiki Co Ltd トランスミッションのシフト駆動装置
GB2240372A (en) * 1990-01-25 1991-07-31 Automotive Products Plc A gear position sensor
US5357821A (en) * 1993-04-13 1994-10-25 General Motors Corporation Transmission and shift control
DE4335754A1 (de) * 1993-10-20 1995-04-27 Zahnradfabrik Friedrichshafen Schaltvorrichtung mit Steuergliedern
US5481935A (en) * 1991-11-12 1996-01-09 Zf Friedrichshafen Ag Gearshifting arrangement for actuating motor vehicle multi-speed gearboxes
US5507196A (en) * 1991-11-12 1996-04-16 Zf Friedrichshafen Ag Gearshifting arrangement for actuating motor vehicle multi-speed gearboxes
US5809835A (en) * 1997-01-21 1998-09-22 Ford Global Technologies, Inc. Manual transmission shift lever
DE19920064A1 (de) * 1999-05-03 2000-11-16 Daimler Chrysler Ag Zahnräderwechselgetriebe für ein Kraftfahrzeug
DE10127955A1 (de) * 2000-06-20 2002-01-03 Adwest Heidemann Einbeck Gmbh Schaltvorrichtung für ein Fahrzeug-Wechselgetriebe
US6389919B1 (en) 1998-05-05 2002-05-21 Renault Compact gearbox
US20030084741A1 (en) * 1998-05-13 2003-05-08 Lemforder Metallwaren Ag Gearshift selector for a vehicle transmission
EP1486704A1 (fr) * 2003-06-12 2004-12-15 HOERBIGER Antriebstechnik GmbH Dispositif de passage des vitesses

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Publication number Priority date Publication date Assignee Title
US573147A (en) 1896-12-15 Head-rest
US1283561A (en) * 1917-09-07 1918-11-05 Bayard E Richardson Gear-shifting mechanism.
GB1158829A (en) * 1967-08-04 1969-07-23 Ifa Getriebewerke Brandenburg Shift Mechanism for Overdrive Arrangements
GB1186791A (en) * 1968-01-18 1970-04-02 Vauxhall Motors Ltd Change-Speed Gear Mechanisms
US3929029A (en) 1974-02-25 1975-12-30 Borg Warner Transmission shift control linkage
EP0131720A1 (fr) 1983-06-17 1985-01-23 IVECO FIAT S.p.A. Dispositif de sélection et d'engagement des vitesses pour une transmission de véhicule à moteur
EP0371159A1 (fr) * 1988-11-28 1990-06-06 Csepel Autogyár Commande électropneumatique pour changement de vitesses à distance, en particulier pour changer les vitesses d'une transmission mécanique synchronisée d'automobiles
JPH02217663A (ja) * 1989-02-20 1990-08-30 Diesel Kiki Co Ltd トランスミッションのシフト駆動装置
GB2240372A (en) * 1990-01-25 1991-07-31 Automotive Products Plc A gear position sensor
US5481935A (en) * 1991-11-12 1996-01-09 Zf Friedrichshafen Ag Gearshifting arrangement for actuating motor vehicle multi-speed gearboxes
US5507196A (en) * 1991-11-12 1996-04-16 Zf Friedrichshafen Ag Gearshifting arrangement for actuating motor vehicle multi-speed gearboxes
US5357821A (en) * 1993-04-13 1994-10-25 General Motors Corporation Transmission and shift control
DE4335754A1 (de) * 1993-10-20 1995-04-27 Zahnradfabrik Friedrichshafen Schaltvorrichtung mit Steuergliedern
US5809835A (en) * 1997-01-21 1998-09-22 Ford Global Technologies, Inc. Manual transmission shift lever
US6389919B1 (en) 1998-05-05 2002-05-21 Renault Compact gearbox
US20030084741A1 (en) * 1998-05-13 2003-05-08 Lemforder Metallwaren Ag Gearshift selector for a vehicle transmission
DE19920064A1 (de) * 1999-05-03 2000-11-16 Daimler Chrysler Ag Zahnräderwechselgetriebe für ein Kraftfahrzeug
DE10127955A1 (de) * 2000-06-20 2002-01-03 Adwest Heidemann Einbeck Gmbh Schaltvorrichtung für ein Fahrzeug-Wechselgetriebe
EP1486704A1 (fr) * 2003-06-12 2004-12-15 HOERBIGER Antriebstechnik GmbH Dispositif de passage des vitesses

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* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 519 (M - 1048) 14 November 1990 (1990-11-14) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000600A3 (fr) * 2006-06-30 2008-05-08 Zahnradfabrik Friedrichshafen Dispositif de changement de vitesses pour boîte de vitesses
DE102007024364A1 (de) * 2007-05-24 2008-11-27 Zf Friedrichshafen Ag Schalteinrichtung eines mehrstufigen Fahrzeuggetriebes
DE102007024364B4 (de) * 2007-05-24 2018-05-24 Zf Friedrichshafen Ag Schalteinrichtung eines mehrstufigen Fahrzeuggetriebes
FR2992042A1 (fr) * 2012-06-18 2013-12-20 Peugeot Citroen Automobiles Sa Systeme d'actionnement de changement de rapport pour une boite de vitesses
WO2016000891A1 (fr) * 2014-07-02 2016-01-07 Zf Friedrichshafen Ag Actionneur de changement de rapport, boîte de vitesses et procédé pour faire fonctionner un actionneur de changement de rapport
CN105546109A (zh) * 2016-01-22 2016-05-04 安徽江淮汽车股份有限公司 一种带互锁结构的拨叉轴
WO2023232259A1 (fr) 2022-06-02 2023-12-07 Volvo Truck Corporation Dispositif de changement de vitesse, transmission et procédé d'assemblage de transmission

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SE0400621L (sv) 2005-09-13
SE0400621D0 (sv) 2004-03-12

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