EP2892794A1 - Gear shifting mechanism for vehicles with a tilt cab - Google Patents

Gear shifting mechanism for vehicles with a tilt cab

Info

Publication number
EP2892794A1
EP2892794A1 EP13834681.2A EP13834681A EP2892794A1 EP 2892794 A1 EP2892794 A1 EP 2892794A1 EP 13834681 A EP13834681 A EP 13834681A EP 2892794 A1 EP2892794 A1 EP 2892794A1
Authority
EP
European Patent Office
Prior art keywords
linkage
cab
shift lever
gear shifting
shifting mechanism
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.)
Withdrawn
Application number
EP13834681.2A
Other languages
German (de)
French (fr)
Other versions
EP2892794A4 (en
Inventor
Morgan Colling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scania CV AB
Original Assignee
Scania CV AB
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 Scania CV AB filed Critical Scania CV AB
Publication of EP2892794A1 publication Critical patent/EP2892794A1/en
Publication of EP2892794A4 publication Critical patent/EP2892794A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
    • B62D33/073—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other characterised by special adaptations of vehicle control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K20/00—Arrangement or mounting of change-speed gearing control devices in vehicles
    • B60K20/02—Arrangement or mounting of change-speed gearing control devices in vehicles of initiating means
    • B60K20/04—Arrangement or mounting of change-speed gearing control devices in vehicles of initiating means floor mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
    • B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses

Definitions

  • the present invention generally concerns a gear shifting mechanism for a vehicle with a tilt cab.
  • the invention concerns in particular a gear shifting mechanism comprising a manual shift lever equipped with a linkage system with preferably at least one cable part and one rotary joint disposed in or in proximity to the tilt pivot to achieve shifting of a gearbox and enable the cab to be tilted.
  • the invention also concerns a vehicle equipped with a gear shifting mechanism of said type.
  • Conventional manual gear shifting mechanisms function in such a way that the driver shifts the vehicle transmission by means of a shift lever that is mechanically coupled to the vehicle gear box by means of, for example, a linkage system or cables.
  • the use of cables from shift lever to gearbox has long been well known in cars.
  • gear shifting mechanism consists of cables, it is of decisive important that the cable (s) be long enough that it/they do not become stretched or damaged when the cab is tilted during service or maintenance of the engine or inspection of other components disposed below the cab.
  • gear shifting mechanism consists of one or a plurality of cables it may be appropriate for them to pass through, or in any case in proximity to, the tilt pivot, i.e. at the height of or in proximity to the pivot point of the cab, on the way from shift lever to gearbox, so that the design does not impede or make it more difficult to be able to tilt the cab.
  • the cable thus appropriately runs beneath the cab floor from the shift lever and forward in the vehicle, through or in proximity to the tilt pivot of the cab and then back again so that it reaches the vehicle gearbox and its gear selector.
  • the cable When running the cable, it is important to avoid placing it in excessive proximity to warm/hot areas, such as certain parts of the engine, as this will affect the service life of the sleeve and thus that of the gear shifting mechanism.
  • the cable will thus be relatively long, as it must extend forward and past the tilt pivot of the cab and in a broad arc so as to minimize the friction between the cable and the cable sleeve. If the cable is laid in an arc with too narrow a radius, the friction will be too great and gear shifting will be made impossible, more difficult or, in any event, it will feel less comfortable for the driver to manage.
  • patent document US4276953 describes a gear shifting mechanism with a linkage system for a vehicle with a tilt cab and wherein the movements of the shift lever are transferred to the gearbox primarily by means of rods.
  • a displaceable joint In proximity to the tilt point there is arranged a displaceable joint that also permits the linkage from the shift lever to be rotated upward when the cab is tilted. If the cab is spring- suspended at the front, this design will be sensitive to the sprung movements of the cab because the joints will move the shift lever in correspondence with the sprung movements of the cab.
  • the design will also be relatively cumbersome, with its stiff linkages/rods, making it more difficult to place/install in a densely packed vehicle.
  • Patent document WO2009143938 describes a solution in which a cable is arranged in proximity to the tilt pivot of the cab.
  • the cable is mounted so that it runs in a curve with a large radius in order to keep the friction within acceptable limits.
  • This solution makes it possible to run the cable wherever space is available, but it is consequently associated with the drawbacks that the present invention solves.
  • the mechanism is intended for a steering wheel-mounted shift lever, which entails that the cable runs in a smaller curve, with the result that the problem of axial slack is not as great,
  • the design is not suitable for a floor-mounted shift lever that is, for example, di sposed between the seats in the cab .
  • One object of the present invention is to solve the foregom problems and describe a simple and compact gear shifting mechanism for a vehicle with a tilt cab, and one that enable flexible and appropriate installation in the vehicle.
  • a further object of the invention is that the gear shifting mechanism must exhibit low friction and minimal axial slack.
  • a further object of the invention is that it must furnish the driver with mechanical and distinct feedback concerning the various gear positions of the shift lever.
  • a further object of the invention is that the gear shifting mechanism must be functional and at the same time cost- effective to fabricate, install and maintain.
  • gear shifting mechanism is designed in accordance with the features specified in the characterizing portion of claim 1.
  • the invention thus concerns a gear shifting mechanism intended for a vehicle with a tilt cab and comprising a mechanical linkage system arranged between the shift lever and the gearbox and preferably consisting of a linkage rod, a rotary linkage disposed in or in proximity to the pivot point of the cab, and a cable .
  • a handle is arranged at the top of the shift lever, which is arranged for example in the floor of the cab, while the lower portion of the lever is advantageously disposed below the cab floor.
  • the first part of the gear shifting mechanism consists of a first linkage rod connected to the lower end point of the shift lever at a first pivot point.
  • the linkage rod is arranged so as to directly or indirectly act upon a first arm in the rotary linkage that is arranged at or in proximity to the tilt pivot.
  • the first linkage rod is advantageously connected to a rotatable linkage mechanism for redirecting, for example because of obstructive chassis components or floor sections, and in turn transferring a shifting movement to the rotary linkage via a second linkage rod.
  • a cable that is connected at its second end to the gearbox via a gear selector is connected to the second arm of the rotary linkage .
  • the primary advantage of the invention is that it offers a flexible, robust, compact and cost-effective design that has few parts but still enables reliable function and is easy to install in a densely packed vehicle.
  • the gear shifting mechanism also enables the cab to be tilted without any part needing to be loosened or removed. Because a cable is used, the gear shifting mechanism can easily be conformed to the spaces that are available in the vehicle, and the gear shifting mechanism ensures two important functions, i.e. low friction and minimal slack.
  • Figure 1 shows, in a view from the side, a goods vehicle with a tilt cab.
  • Figure 2 shows, in greater detail, a gear shifting mechanism laid bare from surrounding and otherwise concealing components in the vehicle.
  • Figure 3 is a schematic figure showing the function of a preferred gear shifting mechanism.
  • Figure 4 is a schematic figure that shows how a redirection of the shift lever movement can be achieved.
  • Figure 5 is a schematic figure that shows how an alternative redirection of the shift lever movement can be achieved.
  • Figure 6 is a schematic figure showing a gear shifting mechanism wherein the linkage rod and the cable have traded places .
  • Figure 1 shows, in a view from the side, the front part of a goods vehicle with its driver cab 1.
  • the cab 1 is, for example by means of hydraulic pistons (not shown) , forwardly tiltable around a tilt joint 2 by means of which the cab 1 is in mechanical connection with the vehicle chassis 3.
  • the cab 1 In its untilted state the cab 1 is secured to the chassis 3 at the rear edge 4 of the cab 1 by means of locking devices (not shown) .
  • the shift lever 5 of the vehicle is floor mounted and arranged between the driver seat 6 and the passenger seat (concealed) , and in mechanical connection with the vehicle gear box 7 (indicated by broken lines) .
  • FIG. 2 shows, in greater detail, the gear shifting mechanism
  • the shift lever 5 is arranged in a floor joint
  • the gear shifting mechanism 8 consists here of a first linkage rod 13 connected to the lower end point 11 of the shift lever 5 by means of a first joint 14. At its opposite end 15 the linkage rod 13 is mounted in articulated fashion in a rotatable linkage mechanism 16 that is limitedly rotatable around a second joint 17.
  • the linkage mechanism 8 is arranged to enable redirection of the shift lever movement in order to avoid solid obstacles such as parts of floor sections 10 or the like, and in turn acts, via a second linkage rod 18, upon a first, upper, arm 19 on the rotary linkage 20 arranged at or in proximity to the tilt joint/tilt pivot and in limitedly rotatable fashion around a joint 25.
  • the shift lever 5 transfers a shifting movement to the rotary linkage 20, and the linkage mechanism 8 is thus arranged so as to enable a mechanical connection between the shift lever 5 and the rotary linkage 20 despite the fact that the cab floor 10 does not allow for a single long and straight linkage rod between the shift lever 5 and the rotary linkage 20.
  • the second, lower arm 21 of the rotary linkage 20 is connected [to] the one end of a flexible cable 22, the second end of which is connected to the gear selector 12 in the vehicle gearbox 7. It is thus possible for this part of the gear shifting mechanism 8 to be positioned easily and deployed in its optimum position in a densely packed engine compartment. This also renders the gear shifting mechanism 8 less sensitive to relative movements between the vehicle drivetrain, chassis and cab, such as can arise due to uneven terrain during the forward travel of the vehicle, vibrations in the drivetrain, etc .
  • FIG. 3 schematically shows how the gear shifting mechanism 8 is composed and functions.
  • the linkage mechanism 16 is thereby rotated several degrees counterclockwise around its pivot point 17 and in turn also moves the second linkage rod 18 back somewhat.
  • the rotary linkage 20 at or in proximity to the tilt pivot of the cab 1 is now rotated clockwise.
  • the lower arm 21 of the rotary linkage 20 is moved forward and acts upon the cable 22 to move the gear selector 12 of the gearbox 7 forward in the vehicle.
  • the desired gear is thereby engaged.
  • the gear selector 12 engages different gears, depending on the position it assumes.
  • Figure 4 is a schematic figure that shows how a redirection of the shift lever movement can be achieved. This can be
  • the linkage mechanism 16 is arranged so as to rotate around a centrally disposed pivot point 17, and the first linkage rod 13 is connected to the linkage mechanism 16 by means of a pivot point 23.
  • the second linkage rod 18 is connected to the linkage mechanism 16 via an additional pivot point 24.
  • the shift lever movement is redirected by means of this arrangement, as compared to the arrangement in Figure 3, and the gear selector 12 will react in the opposite direction.
  • Figure 5 is a schematic figure that shows how yet another redirection of the shift lever movement can be achieved, here in the rotary linkage 20.
  • the rotary linkage 20 rotates around a pivot point 25 arranged on the one end section of the rotary linkage 20.
  • the cable 22 is thereby caused to move in the same direction as the second linkage rod 18.
  • Figure 6 is another schematic figure showing the gear shifting mechanism 8 in which a cable has replaced the linkage rods 13, 18 and a third linkage rod 26 is arranged between the gearbox 7 and the rotary linkage 20, which can be advantageous in densely packed spaces or when components in the vehicle, for example, prevent the running of straight linkage rods beneath the cab floor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Mechanical Control Devices (AREA)

Abstract

The invention concerns a gear shifting mechanism (8) for a vehicle with a tilt cab (1) and comprising a gear box (7) with a gear selector (12) and a shift lever (5) disposed in the cab, which shift lever the driver can maneuver between different gear positions. The invention is realized in that a limitedly rotatable rotary linkage (20) is arranged via a joint (25) in or in proximity to the tilt joint/tilt pivot (2) of the cab (1), in that the one arm (19, 21) of the rotary linkage (20) is connected to a linkage rod (18, 26), in that the second arm (19, 21) of the rotary linkage (20) is connected to a cable (22), and in that the linkage rod (18,26), the rotary linkage (20) and the cable (22) constitute an integrated system for transferring a shifting movement from the shift lever (5) of the vehicle to its gearbox (7).

Description

GEAR SHIFTING MECHANISM FOR VEHICLES WITH A TILT CAB
TECHNICAL FIELD OF THE INVENTION
The present invention generally concerns a gear shifting mechanism for a vehicle with a tilt cab. The invention concerns in particular a gear shifting mechanism comprising a manual shift lever equipped with a linkage system with preferably at least one cable part and one rotary joint disposed in or in proximity to the tilt pivot to achieve shifting of a gearbox and enable the cab to be tilted. The invention also concerns a vehicle equipped with a gear shifting mechanism of said type.
BACKGROUND OF THE ART
Conventional manual gear shifting mechanisms function in such a way that the driver shifts the vehicle transmission by means of a shift lever that is mechanically coupled to the vehicle gear box by means of, for example, a linkage system or cables. The use of cables from shift lever to gearbox has long been well known in cars.
In the case of heavier vehicles, for example those with tilt cabs, it is important that the gear shifting mechanism permit tilting without having to be temporarily removed or
disconnected. If the gear shifting mechanism consists of cables, it is of decisive important that the cable (s) be long enough that it/they do not become stretched or damaged when the cab is tilted during service or maintenance of the engine or inspection of other components disposed below the cab.
There is naturally a desire to avoid cumbersome, expensive and complicated solutions, and the gear shifting mechanisms must function without slack or noise. It is also very important for the gear shifting mechanisms to furnish the driver with a rapid and distinct mechanical response/feedback indicating what gear the system is in.
If the gear shifting mechanism consists of one or a plurality of cables it may be appropriate for them to pass through, or in any case in proximity to, the tilt pivot, i.e. at the height of or in proximity to the pivot point of the cab, on the way from shift lever to gearbox, so that the design does not impede or make it more difficult to be able to tilt the cab. The cable thus appropriately runs beneath the cab floor from the shift lever and forward in the vehicle, through or in proximity to the tilt pivot of the cab and then back again so that it reaches the vehicle gearbox and its gear selector. When running the cable, it is important to avoid placing it in excessive proximity to warm/hot areas, such as certain parts of the engine, as this will affect the service life of the sleeve and thus that of the gear shifting mechanism. The cable will thus be relatively long, as it must extend forward and past the tilt pivot of the cab and in a broad arc so as to minimize the friction between the cable and the cable sleeve. If the cable is laid in an arc with too narrow a radius, the friction will be too great and gear shifting will be made impossible, more difficult or, in any event, it will feel less comfortable for the driver to manage.
Wintertime, when the friction in all mechanisms usually increases and accumulated moisture in, for example the cable sleeve and its gaiters, freezes will threaten the function and, at the very least, more force will be required to move the cable in its cable sleeve. Attempts are made to address this problem by leaving a certain degree of play between the cable and the cable sleeve. However, this entails that the cable can move somewhat laterally in inside the sleeve, which can be likened to the cable bending in the sleeve and, because the cable extends roughly 180 degrees in a broad arc, this play leads to the creation of slack in the axial direction of the cable, which the driver can experience as slack in the gearshift/gear selector. As a result, the gear positions cannot be detected entirely distinctly, and this can make it more difficult for the driver to know with certainty what gear he is about to engage or when the clutch pedal should be released. It is thus generally very important to create mechanically distinct feedback in terms of gear control, and the creation of a tactile sensation is desirable so that the driver truly senses that the shift lever is in direct
mechanical contact with the gearbox.
Attempts have previously been made to create gear shifting mechanisms for vehicles with tilt cabs, which mechanisms are simple yet robust and inexpensive to fabricate and install, and which furnish mechanically distinct feedback to the driver .
For example, patent document US4276953 describes a gear shifting mechanism with a linkage system for a vehicle with a tilt cab and wherein the movements of the shift lever are transferred to the gearbox primarily by means of rods. In proximity to the tilt point there is arranged a displaceable joint that also permits the linkage from the shift lever to be rotated upward when the cab is tilted. If the cab is spring- suspended at the front, this design will be sensitive to the sprung movements of the cab because the joints will move the shift lever in correspondence with the sprung movements of the cab. The design will also be relatively cumbersome, with its stiff linkages/rods, making it more difficult to place/install in a densely packed vehicle.
Patent document WO2009143938 describes a solution in which a cable is arranged in proximity to the tilt pivot of the cab. The cable is mounted so that it runs in a curve with a large radius in order to keep the friction within acceptable limits. However, because of the length of the cable and the fact that it runs in a large curve, there is axial slack in the cable, which is a significant drawback. This solution makes it possible to run the cable wherever space is available, but it is consequently associated with the drawbacks that the present invention solves.
US2003221503 describes a design similar to the one in the above-referenced WO2009143938 document, wherein the
crooked/bent portions of the cables are secured at the joint that is also the tilt pivot of the cab. The mechanism is intended for a steering wheel-mounted shift lever, which entails that the cable runs in a smaller curve, with the result that the problem of axial slack is not as great,
However, the design is not suitable for a floor-mounted shift lever that is, for example, di sposed between the seats in the cab .
DE2508679 describes a design similar to that described in
US4276953, i.e. wherein the movements of the shift lever are transferred to the gearbox by means of rods rather than cables . The rods are articulated in or in proximity to the tilt pivot of the cab, and the linkage from the shift lever is rotated upward when the cab is tilted. This design is also relatively cumbersome, with complicated mechanics involving a plurality of joints and rigid linkages/rods that make it difficult to place/install in a densely packed vehicle.
Unfortunately, known gear shifting mechanisms in which cable is used along the entire path from shift liver to gearbox generate significant friction and/or axial slack that arises in the cable inside the cable sleeve, which degrades the comfort of and mechanical feedback to the driver. The prior art thus offers no design that anticipates the present invention . SUMMARY OF THE INVENTION
One object of the present invention is to solve the foregom problems and describe a simple and compact gear shifting mechanism for a vehicle with a tilt cab, and one that enable flexible and appropriate installation in the vehicle.
A further object of the invention is that the gear shifting mechanism must exhibit low friction and minimal axial slack.
A further object of the invention is that it must furnish the driver with mechanical and distinct feedback concerning the various gear positions of the shift lever.
A further object of the invention is that the gear shifting mechanism must be functional and at the same time cost- effective to fabricate, install and maintain.
These and other objects and advantages are achieved according to the invention in that the gear shifting mechanism is designed in accordance with the features specified in the characterizing portion of claim 1.
The invention thus concerns a gear shifting mechanism intended for a vehicle with a tilt cab and comprising a mechanical linkage system arranged between the shift lever and the gearbox and preferably consisting of a linkage rod, a rotary linkage disposed in or in proximity to the pivot point of the cab, and a cable .
A handle is arranged at the top of the shift lever, which is arranged for example in the floor of the cab, while the lower portion of the lever is advantageously disposed below the cab floor. When the driver maneuvers the shift lever between different gear positions, the lower end point of the lever moves and generates a movement that is transferred by means of the gear shifting mechanism to the gear selector of the gearbox, by means of which gear selector the desired gear is activated . The first part of the gear shifting mechanism consists of a first linkage rod connected to the lower end point of the shift lever at a first pivot point. The linkage rod is arranged so as to directly or indirectly act upon a first arm in the rotary linkage that is arranged at or in proximity to the tilt pivot. The first linkage rod is advantageously connected to a rotatable linkage mechanism for redirecting, for example because of obstructive chassis components or floor sections, and in turn transferring a shifting movement to the rotary linkage via a second linkage rod.
A cable that is connected at its second end to the gearbox via a gear selector is connected to the second arm of the rotary linkage . The primary advantage of the invention is that it offers a flexible, robust, compact and cost-effective design that has few parts but still enables reliable function and is easy to install in a densely packed vehicle. The gear shifting mechanism also enables the cab to be tilted without any part needing to be loosened or removed. Because a cable is used, the gear shifting mechanism can easily be conformed to the spaces that are available in the vehicle, and the gear shifting mechanism ensures two important functions, i.e. low friction and minimal slack.
Additional features and advantages of the invention are presented in the following more detailed description of the invention, and in the accompanying drawings and other claims. BRIEF LIST OF DRAWINGS
The invention is described in greater detail below in several preferred embodiments based on the accompanying drawings.
Figure 1 shows, in a view from the side, a goods vehicle with a tilt cab.
Figure 2 shows, in greater detail, a gear shifting mechanism laid bare from surrounding and otherwise concealing components in the vehicle.
Figure 3 is a schematic figure showing the function of a preferred gear shifting mechanism.
Figure 4 is a schematic figure that shows how a redirection of the shift lever movement can be achieved.
Figure 5 is a schematic figure that shows how an alternative redirection of the shift lever movement can be achieved.
Figure 6 is a schematic figure showing a gear shifting mechanism wherein the linkage rod and the cable have traded places .
DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 1 shows, in a view from the side, the front part of a goods vehicle with its driver cab 1. The cab 1 is, for example by means of hydraulic pistons (not shown) , forwardly tiltable around a tilt joint 2 by means of which the cab 1 is in mechanical connection with the vehicle chassis 3. In its untilted state the cab 1 is secured to the chassis 3 at the rear edge 4 of the cab 1 by means of locking devices (not shown) . Here the shift lever 5 of the vehicle is floor mounted and arranged between the driver seat 6 and the passenger seat (concealed) , and in mechanical connection with the vehicle gear box 7 (indicated by broken lines) .
Figure 2 shows, in greater detail, the gear shifting mechanism
8 according to the invention laid bare from the vehicle and its components. The shift lever 5 is arranged in a floor joint
9 in the pressed steel floor 10 of the cab, and can be maneuvered in the horizontal plane, forward-back (x-axis) and laterally (y-axis). When the driver maneuvers the shift lever 5 between different gear positions, its lower end point 11 moves in the opposite direction and generates a movement that is transferred by means of the gear shifting mechanism 8 to the gear selector 12 of the gearbox 7, by means of which gear selector the desired gear is activated. The first part of the gear shifting mechanism 8 consists here of a first linkage rod 13 connected to the lower end point 11 of the shift lever 5 by means of a first joint 14. At its opposite end 15 the linkage rod 13 is mounted in articulated fashion in a rotatable linkage mechanism 16 that is limitedly rotatable around a second joint 17. The linkage mechanism 8 is arranged to enable redirection of the shift lever movement in order to avoid solid obstacles such as parts of floor sections 10 or the like, and in turn acts, via a second linkage rod 18, upon a first, upper, arm 19 on the rotary linkage 20 arranged at or in proximity to the tilt joint/tilt pivot and in limitedly rotatable fashion around a joint 25. In this way the shift lever 5 transfers a shifting movement to the rotary linkage 20, and the linkage mechanism 8 is thus arranged so as to enable a mechanical connection between the shift lever 5 and the rotary linkage 20 despite the fact that the cab floor 10 does not allow for a single long and straight linkage rod between the shift lever 5 and the rotary linkage 20. The second, lower arm 21 of the rotary linkage 20 is connected [to] the one end of a flexible cable 22, the second end of which is connected to the gear selector 12 in the vehicle gearbox 7. It is thus possible for this part of the gear shifting mechanism 8 to be positioned easily and deployed in its optimum position in a densely packed engine compartment. This also renders the gear shifting mechanism 8 less sensitive to relative movements between the vehicle drivetrain, chassis and cab, such as can arise due to uneven terrain during the forward travel of the vehicle, vibrations in the drivetrain, etc .
Figure 3 schematically shows how the gear shifting mechanism 8 is composed and functions. When the shift lever 5 is
maneuvered, for example, forward as viewed in the longitudinal direction of the vehicle, the first linkage rod 13 is pulled back. The linkage mechanism 16 is thereby rotated several degrees counterclockwise around its pivot point 17 and in turn also moves the second linkage rod 18 back somewhat. The rotary linkage 20 at or in proximity to the tilt pivot of the cab 1 is now rotated clockwise. The lower arm 21 of the rotary linkage 20 is moved forward and acts upon the cable 22 to move the gear selector 12 of the gearbox 7 forward in the vehicle. The desired gear is thereby engaged. The gear selector 12 engages different gears, depending on the position it assumes.
Figure 4 is a schematic figure that shows how a redirection of the shift lever movement can be achieved. This can be
applicable depending, for example, on the type of gearbox 7 being used. The linkage mechanism 16 is arranged so as to rotate around a centrally disposed pivot point 17, and the first linkage rod 13 is connected to the linkage mechanism 16 by means of a pivot point 23. The second linkage rod 18 is connected to the linkage mechanism 16 via an additional pivot point 24. The shift lever movement is redirected by means of this arrangement, as compared to the arrangement in Figure 3, and the gear selector 12 will react in the opposite direction.
Figure 5 is a schematic figure that shows how yet another redirection of the shift lever movement can be achieved, here in the rotary linkage 20. In this embodiment, the rotary linkage 20 rotates around a pivot point 25 arranged on the one end section of the rotary linkage 20. The cable 22 is thereby caused to move in the same direction as the second linkage rod 18.
Figure 6 is another schematic figure showing the gear shifting mechanism 8 in which a cable has replaced the linkage rods 13, 18 and a third linkage rod 26 is arranged between the gearbox 7 and the rotary linkage 20, which can be advantageous in densely packed spaces or when components in the vehicle, for example, prevent the running of straight linkage rods beneath the cab floor.
The foregoing description is intended primarily to facilitate an understanding of the invention. The invention is
consequently not solely limited to the described embodiments, but rather other variants of the invention are possible and conceivable within the framework of the concept of the invention and the protective scope of the claims that follow. It must be noted that the foregoing description is focused on a single linkage system, but that two corresponding systems may be necessary to transfer the various possible gear positions of the shift lever, both those wherein the shift lever is moved forward-backward as viewed in the longitudinal direction of the vehicle and those wherein the shift lever is moved laterally as viewed in the longitudinal direction of the vehicle .

Claims

1. A gear shifting mechanism (8) for a vehicle with a tilt cab (1) and comprising a gearbox (7) with a gear selector (12) and a shift lever (5) disposed in the cab, which shift lever the driver can maneuver between different gear positions,
characterized in that,
- a limitedly rotatable rotary linkage (2) is arranged via a joint (25) in or in proximity to the tilt joint/tilt pivot (2) of the cab (1) ,
- the one arm (19, 21) of the rotary linkage (20) is connected to a linkage rod (18,26),
- the second arm (19, 21) of the rotary linkage (20) is connected to a cable (22), and
- the linkage rod (18,26), the rotary linkage (20) and the cable (22) constitute an integrated system for transferring a shifting movement from the shift lever (5) of the vehicle to its gearbox ( 7 ) .
2. A gear shifting mechanism (8) according to claim 1,
characterized in that,
- the rotary linkage (20) is connected to the shift lever (5) by means of at least one linkage rod (13,18) .
3. A gear shifting mechanism (8) according to claim 1,
characterized in that,
- the rotary linkage (20) is connected to the gearbox (7) by means of at least one cable (22) .
4. A gear shifting mechanism (8) according to any of the preceding claims,
characterized in that,
- a limitedly rotatable linkage mechanism (16) is arranged in the system between the rotary linkage (20) and the shift lever ( 5 ) .
5. A gear shifting mechanism (8) according to any of the preceding claims,
characterized in that,
- the linkage mechanism (8) is connected to the shift lever (5) and the rotary linkage (20) by means of linkage rods (13,18) .
6. A gear shifting mechanism (8) according to any of the preceding claims,
characterized in that,
- the rotary linkage (20) is oriented in an essentially vertical direction in or in proximity to the tilt joint/tilt pivot (2) of the cab (1) .
7. A vehicle, particularly a goods vehicle, equipped with a gear shifting mechanism according to any of claims 1-6.
EP13834681.2A 2012-09-06 2013-08-29 Gear shifting mechanism for vehicles with a tilt cab Withdrawn EP2892794A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1250998A SE538579C2 (en) 2012-09-06 2012-09-06 Transmission mechanism for vehicles
PCT/SE2013/051012 WO2014038996A1 (en) 2012-09-06 2013-08-29 Gear shifting mechanism for vehicles with a tilt cab

Publications (2)

Publication Number Publication Date
EP2892794A1 true EP2892794A1 (en) 2015-07-15
EP2892794A4 EP2892794A4 (en) 2016-04-20

Family

ID=50237468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13834681.2A Withdrawn EP2892794A4 (en) 2012-09-06 2013-08-29 Gear shifting mechanism for vehicles with a tilt cab

Country Status (3)

Country Link
EP (1) EP2892794A4 (en)
SE (1) SE538579C2 (en)
WO (1) WO2014038996A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106321811A (en) * 2016-10-19 2017-01-11 力帆实业(集团)股份有限公司 Gear selecting and shifting inhaul cable structure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1555994A1 (en) * 1965-10-16 1969-08-21 Kloeckner Humboldt Deutz Ag Device for operating the manual transmission for trucks
JPS6319218Y2 (en) * 1979-07-06 1988-05-30
FR2492746A1 (en) * 1980-10-24 1982-04-30 Unic Sa Gear box drive for vehicle with tipping cabin - has gear linkage rotating with cabin axis reducing joint stresses
JPS59170026U (en) * 1983-04-30 1984-11-14 日産ディーゼル工業株式会社 Transmission remote control device for cab-over vehicles
JPH0518189Y2 (en) * 1988-03-22 1993-05-14
JPH0542061U (en) * 1991-11-07 1993-06-08 日野自動車工業株式会社 Cab-tailed truck transmission control rod device
JPH09303367A (en) * 1996-05-16 1997-11-25 Nissan Diesel Motor Co Ltd Control cable wiring stay
JP4550445B2 (en) * 2004-02-16 2010-09-22 Ｕｄトラックス株式会社 Cable stopper structure for shift operating device

Also Published As

Publication number Publication date
SE1250998A1 (en) 2014-03-07
EP2892794A4 (en) 2016-04-20
SE538579C2 (en) 2016-09-27
WO2014038996A1 (en) 2014-03-13

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