WO1993023278A1 - Dispositif directionnel destine aux vehicules chenilles - Google Patents

Dispositif directionnel destine aux vehicules chenilles Download PDF

Info

Publication number
WO1993023278A1
WO1993023278A1 PCT/NO1993/000077 NO9300077W WO9323278A1 WO 1993023278 A1 WO1993023278 A1 WO 1993023278A1 NO 9300077 W NO9300077 W NO 9300077W WO 9323278 A1 WO9323278 A1 WO 9323278A1
Authority
WO
WIPO (PCT)
Prior art keywords
track
sole
shoe
vehicle
parts
Prior art date
Application number
PCT/NO1993/000077
Other languages
English (en)
Inventor
Harald Krogsrud
Original Assignee
Harald Krogsrud
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 Harald Krogsrud filed Critical Harald Krogsrud
Publication of WO1993023278A1 publication Critical patent/WO1993023278A1/fr
Priority to SE9403874A priority Critical patent/SE503331C2/sv
Priority to NO944320A priority patent/NO944320L/no
Priority to FI945304A priority patent/FI945304A/fi

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/22—Endless track steering being effected by deflecting endless track rollers or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like

Definitions

  • the invention relates to a steering device for a tracked vehicle according to the introduction to claim 1.
  • Vehicles which are driven by one track, where the vehicle is steered by means of other elements which are in contact with the base, e.g. wheels, runners and the like, i.e. separate steering devices which are not a part of the track.
  • each track is forcibly deflected sideways, thus causing the plane in which the loop of the endless track extends to be curved.
  • the steering device for such tracked vehicles comprises electronic and hydraulic components and is technically mature.
  • simple vehicles such as snow scooters, snow ploughs and rotavators, etc.
  • track and steering devices of this kind are extremely expensive in relation to the price of the vehicle's other components.
  • the object of the invention is to provide a device of the type described in the introduction which is not encumbered by the above-mentioned disadvantages.
  • Fig. 1 is a perspective view of a track for a tracked vehicle with only one track, where some of the track shoes have been omitted and the vehicle drives straight ahead.
  • Fig. 2 is a perspective view of the track illustrated in fig. 1, but turned through an angle ⁇ in relation to the position of the track illustrated in fig. 1.
  • Fig. 3 is a view of a first embodiment of a track shoe, partially cut away, and seen in the direction along the circumference of the track.
  • Fig. 4 shows the right-hand end section of the shoe illustrated in fig. 3 , its sole part being displaced in relation to the shoe's upper part.
  • Fig. 5 is a section through line V-V in fig. 4.
  • Fig. 6 is a side view of a second embodiment of a track shoe, partially cut away, and seen in the direction along the circumference of the track.
  • Fig. 7 is a section through line VII-VII in fig-. 6.
  • the track rests on a horizontal base, e.g. the ground.
  • the endless track 1 On the outside of the endless track 1 which is illustrated in fig. 1, there are evenly distributed along the circumference of the track a number of elongated track shoes 2, which extend in the track's transverse direction, and which are arranged to abut against the track's base, only a few of these track shoes 2 being illustrated in the figure.
  • the object of the shoes is, amongst other things, to provide a good grip for the track on the vehicle's base and constitute easily replaceable wear elements.
  • Each shoe 2 comprises an upper part 3 which is permanently connected to the track 1, and a lower part or sole part 4 which is arranged to come into contact with the vehicle's base.
  • the upper parts 3 are arranged symmetrically relative to a vertical, central plane PI of the track.
  • the sole parts 4 are connected with the respective upper parts 3 in such a way that they can be moved in the direction transverse to the track relative to the upper parts 3 , the shoes having devices which are capable by means of springs or the like of centering the sole parts 4 on the upper parts 3 , so that associated sole parts and upper parts substantially overlap one another when the sole parts are not forcibly moved away from the position by other means.
  • the track is moved in the direc ⁇ tion of arrow V by means of driving and supporting rollers (not shown) which are provided at each end of the track loop, and which in turn are rotatably mounted in the vehicle, the vehicle being moved in the direction of arrow F during this track movement.
  • the device For steering of the vehicle, i.e. turning of the track about a vertically extending axis, the device comprises an arrangement whose design will be explained in more detail below, whereby the sole part of the front shoe 5 and the rear shoe 6, calcu ⁇ lated in the vehicle's direction of movement, of the track section which faces downward, can be moved away from their central position and against the centering spring force, which is exerted between the upper part and the sole part, the sole parts of the front and rear shoes 5 and 6 respectively being moved simultaneously, but each to its own side in relation to the respective upper parts 3.
  • the shoe will have to have a maximum possible path of movement for the sole of aO + al + a2 .. an (where an indicates the movement of the sole which is located immediately in front of the centre of the track) in order to prevent the sole from reaching its sideways limit in the upper part before it reaches the centre of the track, whereafter it is moved in the other direction.
  • Fig. 3 illustrates schematically an embodiment of a shoe, viewed in the track's circumferential direction, where the shoe is illustrated in the position it occupies when the sole part is resting on the ground 7. Moreover, the wall of one of two vertically extending holes which extend through the upper part's 3 end sections is cut away.
  • This shoe's sole part 4 is substantially U-shaped, viewed in the track's circumferential direction, and the sole part's legs 10 project vertically upward and extend with a large clearance through respective holes 11- in the upper part's 3 end sections, calculated in the track's transverse direction.
  • the holes 11 are provided symmetrically in relation to a transverse mid plane of the upper part.
  • each leg 10 is linked via a first pivot 13 with the upper section of two elongated members 12 which are provided on each side of the leg 10, calculated in the circumferential direction for the adjacent track section.
  • the lower end section of the member 12 is linked via a second pivot 14 with the shoe's upper part 3, the pivots 13, 14 extending approximately in this circumferential direction.
  • the distance between the longitudinal axes of the holes 11 corresponds to the distance between the longitudinal axes of the legs 10, and the longitudinal axis of the other pivots 14 intersects the longitudinal axis of the respective holes 11.
  • Fig. 4 shows the right-hand end section of the shoe illustra ⁇ ted in fig. 3, its sole part being moved to the right, away from the central position according to fig. 3, and fig. 5 shows a section along the line V-V through this end section.
  • Fig. 6 illustrates a second embodiment of a track shoe.
  • the shoe illustrated in fig. 6 comprises a U-shaped sole part 24.
  • the upper part 23 there are provided two downwardly open cut-outs 31, where the distance between the longitudinal axes of the sole parts' 24 leg 30 corresponds to the distance between the longitudinal axes of the cut-outs 31.
  • the upper end section of the legs 30 has a longitudinal track 35 which extends in the longitudinal direction of the shoe.
  • a shaft 33 on which there is rotatably provided a roller 32, which is arranged to abut against the bottom 36 of the respective cut-outs 31 when the legs 30 are inserted into the cut-outs.
  • a pin or screw 34 extends in the shoe's longitudinal direction under the roller 32. The pin extends through and is attached to wall sections of the cut-out 31, and acts as a surface for the rollers and prevents the legs from being moved out of the cut-outs 31.
  • the steering device for the sole parts 4, 24 can be designed in the same way as in known per se devices whereby objects which are moved continuously on a track or the like, are moved in the track's transverse direction. Such devices are used, e.g. in sawmills.
  • the sole parts can have one or more sections 15, 35 which project through or past the upper part, and with which the steering device can be connected for sideways movement of the sole parts.
  • the steering device can be arranged for movement of the sole part for the front shoe and the rear shoe, in such a way that the vehicle turns about a point located between these shoes. It is obvious, however, that the device can comprise instead a steering device for only the front sole part, the rear sole part, e.g., being secured in a central position. In this case, however, the total path which must be available for the free movement of sole parts which are located behind the front, steered sole part must be larger, but the steering device can be simpler.
  • more than the front and rear shoe sole parts can, of course, be forcibly moveable, which leads to more reliable steering, but also a more complicated steering device.
  • one group of shoe soles can be moveable in one direction and a second group can be simultaneously moveable in the opposite direction, since the number of shoes in the groups can be equal or unequal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

Un dispositif directionnel est destiné à un véhicule doté d'au moins une chenille sans fin. Celle-ci comporte des patins de traction (2) comprenant une partie supérieure (3), qui est montée de manière fixe sur la chenille, et une semelle (4), qui peut se déplacer par rapport à la partie supérieure (3) transversalement à chenille, et qui est conçue pour prendre appui sur le sol (7). Le véhicule comprend un dispositif qui permet de diriger ce déplacement de la semelle (4) sur la section de chenille qui fait face au sol (7).
PCT/NO1993/000077 1992-05-14 1993-05-13 Dispositif directionnel destine aux vehicules chenilles WO1993023278A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9403874A SE503331C2 (sv) 1992-05-14 1994-11-10 Styranordning för bandfordon
NO944320A NO944320L (no) 1992-05-14 1994-11-11 Styreinnretning for beltekjöretöy
FI945304A FI945304A (fi) 1992-05-14 1994-11-11 Ohjauslaite telaketjuvetoisiin ajoneuvoihin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO921902 1992-05-14
NO921902A NO921902D0 (no) 1992-05-14 1992-05-14 Styringsanordning for beltegaaende kjoeretoeyer

Publications (1)

Publication Number Publication Date
WO1993023278A1 true WO1993023278A1 (fr) 1993-11-25

Family

ID=19895153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1993/000077 WO1993023278A1 (fr) 1992-05-14 1993-05-13 Dispositif directionnel destine aux vehicules chenilles

Country Status (5)

Country Link
AU (1) AU4092693A (fr)
FI (1) FI945304A (fr)
NO (1) NO921902D0 (fr)
SE (1) SE503331C2 (fr)
WO (1) WO1993023278A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325904A (en) * 1997-06-07 1998-12-09 Philip Slater An endless-track load-transfer system for vehicle support, movement, drive, braking and steering

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711351A (en) * 1952-11-26 1955-06-21 Koethke Dean Tracks for tractor vehicles
FR2427241A1 (fr) * 1978-05-31 1979-12-28 Dobson Park Ind Mecanisme a chenilles
EP0395489A1 (fr) * 1989-04-28 1990-10-31 Commissariat A L'energie Atomique Véhicule à chenilles adapté à tourner facilement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711351A (en) * 1952-11-26 1955-06-21 Koethke Dean Tracks for tractor vehicles
FR2427241A1 (fr) * 1978-05-31 1979-12-28 Dobson Park Ind Mecanisme a chenilles
EP0395489A1 (fr) * 1989-04-28 1990-10-31 Commissariat A L'energie Atomique Véhicule à chenilles adapté à tourner facilement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325904A (en) * 1997-06-07 1998-12-09 Philip Slater An endless-track load-transfer system for vehicle support, movement, drive, braking and steering

Also Published As

Publication number Publication date
FI945304A0 (fi) 1994-11-11
NO921902D0 (no) 1992-05-14
AU4092693A (en) 1993-12-13
FI945304A (fi) 1994-11-11
SE503331C2 (sv) 1996-05-28
SE9403874D0 (sv) 1994-11-10
SE9403874L (sv) 1994-11-10

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