EP4294707A1 - Véhicule à chenilles doté d'un tendeur de chenille - Google Patents

Véhicule à chenilles doté d'un tendeur de chenille

Info

Publication number
EP4294707A1
EP4294707A1 EP22741505.6A EP22741505A EP4294707A1 EP 4294707 A1 EP4294707 A1 EP 4294707A1 EP 22741505 A EP22741505 A EP 22741505A EP 4294707 A1 EP4294707 A1 EP 4294707A1
Authority
EP
European Patent Office
Prior art keywords
spindle
track
chain
ball head
vehicle according
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.)
Pending
Application number
EP22741505.6A
Other languages
German (de)
English (en)
Inventor
Detlev Eckhoff
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.)
Rheinmetall Landsysteme GmbH
Original Assignee
Rheinmetall Landsysteme GmbH
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 Rheinmetall Landsysteme GmbH filed Critical Rheinmetall Landsysteme GmbH
Publication of EP4294707A1 publication Critical patent/EP4294707A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/30—Track-tensioning means
    • B62D55/305—Track-tensioning means acting on pivotably mounted idlers

Definitions

  • Track chain tensioners for tracked vehicles are highly stressed and safety-relevant components because driving, steering and braking forces have to be transmitted during ferry operation. Basically, track chain tensioners are required to be able to set a defined chain tension.
  • the crawler chain is always lengthened, which leads to a reduction in chain tension. For this reason, a track chain must be tightened as part of the maintenance work.
  • the track tensioner allows the track chain to be put on and taken off by completely slackening the track chain.
  • the caterpillar is preferably designed as a military, armored caterpillar. According to the state of the art, the special tool for measuring the chain tension and operating the chain tensioner must also be safely stowed away in or on the vehicle.
  • the special tool reduces the payload and the storage volume of the vehicle.
  • DE 2 030 019 A discloses a chain tensioner for crawler tracks, which acts directly on a deflection wheel of the sliding chain and thus produces the tension of the sliding chain.
  • this chain tensioner cannot be locked and must therefore be continuously subjected to hydraulic energy.
  • the object of the present invention is therefore to reduce the aforementioned disadvantages of the prior art.
  • a track tensioner of the track vehicle according to the invention has a ball head spindle, which can act on a guide wheel bearing of the track vehicle and the position of the guide wheel in relation to the vehicle hull can thus be changed depending on the position of the ball head spindle.
  • the chain tensioner is extended and a locking spindle is set in rotation at the same time by means of an energy supply, preferably a hydraulic pressurization of a ball-head spindle.
  • the basis for the locking concept is the fixing or locking of the locking spindle.
  • the dynamic drive forces which are significantly higher than the hydraulically introduced clamping forces, can only be transmitted mechanically.
  • the locking prevents rotation of the locking spindle with the help of a clutch or brake, which ultimately leads to a mechanical locking of the track tensioner.
  • the caterpillar vehicle includes a crawler which is guided over an idler wheel. Furthermore, a chain tensioner is proposed, which can act on the idler wheel.
  • the track tensioner includes a guide wheel bearing, which is designed eccentrically and pivots the guide wheel on the track vehicle. Such a linkage is carried out on a vehicle pan of the crawler vehicle.
  • the track tensioner includes a ball head spindle, which can act on the idler wheel bearing and so, depending on the position of the ball head spindle, the position of the idler wheel in relation to the vehicle hull can be changed.
  • the ball head spindle includes a lock, by means of which the movement of the ball head spindle can be arrested and thus prevented.
  • the lock is designed to be releasable, so that the lock can fix or release the ball-head spindle.
  • the ball head spindle can be charged with energy, preferably with hydraulic energy.
  • Embodiments with electrical energy are also possible.
  • the ball head spindle If the ball head spindle is supplied with energy, it can move depending on the amount of energy and thus act on the idler wheel, which changes its position accordingly and can tension the crawler chain. Once the desired voltage has been reached, the energy can be switched off so that the ball head spindle is no longer supplied with energy. The ball head spindle can then be locked in its position by the lock, so that the tension of the crawler chain is maintained.
  • the ball head spindle is preferably designed to be longitudinally movable and is at least partially mounted in a spindle housing. During the longitudinal movement, the ball head spindle can then be moved further out of the spindle housing or be moved further into the spindle housing.
  • the longitudinal movement of the ball head spindle is caused by a rotatable locking spindle.
  • the locking spindle When energized, the locking spindle then causes a rotational movement about its own axis and causes the longitudinal movement of the ball-head spindle. This is done using a guide thread between the ball head spindle and the locking spindle.
  • a longitudinally movable clutch piston is proposed for the clutch, which can positively engage in the claw clutch. Due to the fact that the clutch piston is only designed to be longitudinally movable and the claw clutch to be rotatable, the clutch piston can prevent the movement of the claw clutch and thus the blocking spindle when a positive connection is established. The blocking spindle and thus also the ball head spindle are then locked.
  • the clutch piston can be supplied with energy, preferably with the same energy as the ball head spindle. By applying energy to the clutch piston, it moves away from the claw clutch and releases the rotation of the locking spindle and thus the ball head spindle.
  • Such a caterpillar vehicle is preferably equipped with two caterpillar tracks and therefore also with two track tensioners.
  • the crawlers are then arranged on either side of the crawler vehicle, respectively.
  • At least one connection is preferably provided for the power supply of the track chain tensioner, for example as a hydraulic connection.
  • An electrical connection can also be provided.
  • one exemplary embodiment proposes providing at least one operating device in the track chain vehicle. Target values can thus be specified, which are implemented via a control and regulation unit and a supply unit is controlled, which makes the required energy available to the track chain tensioner.
  • hydraulic or electrical energy is supplied to the track tensioner, e.g. via the connection.
  • the energy supplied acts on the clutch piston and at the same time on the locking spindle.
  • the blocking spindle and thus the ball head spindle are initially supplied with sufficient energy so that the position of the ball head spindle and thus the guide wheel is not changed when the claw coupling is released.
  • the energy supply can then be changed as required, for example by the control and regulation unit. If the track tension is to be reduced, the power supply can also be reduced. If the track tension is to be increased, the power supply can also be increased.
  • the ball head spindle With higher energy input, the ball head spindle is moved further out of the housing via the locking spindle. At lower energy inputs, the ball screw is moved further into the housing over the locking screw. The movement of the ball head spindle acts on the idler wheel bearing and changes the position of the idler wheel. This adjusts the track tension.
  • the supply unit which provides the energy that is supplied to the chain tensioner, can be controlled by these control and regulation variables.
  • the control and regulation unit can output the variables proportional to the setpoints (P control behavior).
  • P control behavior the setpoints
  • a corresponding approximation to the setpoints can also be carried out by integral behavior of the open-loop and closed-loop control unit (I or PI control behavior).
  • the spindle housing includes a plurality of connections in order to be able to separate and separately control or regulate the amount of energy which is supplied to the clutch piston and the amount of energy which is supplied to the locking spindle.
  • a caterpillar vehicle with a caterpillar track, which is guided over a guide wheel is proposed.
  • a chain tensioner which contains a guide wheel bearing which connects the guide wheel to a vehicle pan of the caterpillar vehicle in a rotatable and eccentric manner.
  • the chain tensioner according to the invention includes a ball head spindle, which can act on the idler wheel bearing. This action can change the position of the guide wheel.
  • the ball head spindle includes a lock to prevent the movement of the ball head spindle.
  • target values for a tension for at least one of the crawlers be set via an operating device.
  • the system can be locked automatically. After locking, the hydraulic actuation can be depressurized. In ferry operation, the entire power transmission takes place exclusively mechanically in order to be able to ensure safety even in the event of high dynamic driving forces.
  • Fig. 4 Block diagram of the components for setting a track tension on a track vehicle.
  • FIG. 1 shows a section of a caterpillar track vehicle according to the invention.
  • a crawler vehicle preferably includes two crawler tracks 2 for the locomotion of the vehicle.
  • the section shows the part of the vehicle hull 1 on which an idler wheel 8 is mounted. Idler wheels 8 are required for directing, guiding and deflecting the track chain 2 and are therefore part of a chain drive.
  • Figure 3 shows a section through the ball head spindle 6 and the spindle housing 5.
  • the ball head spindle 6 is drilled hollow and provided with a non-self-locking movement thread.
  • a locking spindle 14 is integrated concentrically with the ball head spindle 6 and is rotatably mounted. As soon as the ball head spindle 6, which is secured against twisting, is moved hydraulically, the blocking spindle 14 is set in rotation.
  • the supplied energy can also set the blocking spindle 14 in rotation, so that the ball head spindle 6 executes a longitudinal movement and transfers this to the idler wheel bearing.
  • control and regulation unit can also be given a target value by other means, for example by a mobile setting device.
  • the operating unit or the supply unit can also take over the regulation or control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

La présente invention concerne un véhicule à chenilles comprenant : - une chenille (2) qui est guidée au moyen d'une roue de guidage (8) ; et - un tendeur de chaîne (15, 16), contenant un support de roue de guidage (7) qui raccorde de manière rotative et excentrique la roue de guidage (8) à une coque de véhicule (1) du véhicule à chenilles. Le tendeur de chaîne selon la présente invention contient également une broche à tête sphérique (6), qui peut agir sur le support de roue de guidage (7) de telle sorte que la position de la roue de guidage (8) par rapport à la coque de véhicule (1) peut être modifiée en fonction de la position de la broche à tête sphérique (6). La broche à tête sphérique (6) contient un moyen de verrouillage (4) qui peut bloquer ou permettre le mouvement de la broche à tête sphérique (6). De l'énergie hydraulique ou électrique peut être fournie à la broche à tête sphérique (6) de telle sorte que, en fonction de la quantité d'énergie, la broche à tête sphérique (6) peut être rétractée ou étendue. Au moyen de cette mise en œuvre, la mesure, le réglage et la fixation de la tension de chaîne peuvent être effectués automatiquement à partir du siège du conducteur, sans avoir besoin d'accéder au châssis peu accessible et généralement très sale.
EP22741505.6A 2021-08-09 2022-07-08 Véhicule à chenilles doté d'un tendeur de chenille Pending EP4294707A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021120647.2A DE102021120647A1 (de) 2021-08-09 2021-08-09 Gleiskettenfahrzeug mit Gleiskettenspanner
PCT/EP2022/069072 WO2023016722A1 (fr) 2021-08-09 2022-07-08 Véhicule à chenilles doté d'un tendeur de chenille

Publications (1)

Publication Number Publication Date
EP4294707A1 true EP4294707A1 (fr) 2023-12-27

Family

ID=82547620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22741505.6A Pending EP4294707A1 (fr) 2021-08-09 2022-07-08 Véhicule à chenilles doté d'un tendeur de chenille

Country Status (5)

Country Link
US (1) US20240246622A1 (fr)
EP (1) EP4294707A1 (fr)
AU (1) AU2022326745A1 (fr)
DE (1) DE102021120647A1 (fr)
WO (1) WO2023016722A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB571058A (en) 1943-09-08 1945-08-03 Morris Motors Ltd Improvements relating to tensioning means for vehicle driving tracks
DE3232322A1 (de) 1982-08-31 1984-03-01 Krauss-Maffei AG, 8000 München Hydraulische kettenspannvorrichtung
DE3338313A1 (de) * 1983-10-21 1985-05-02 Krauss-Maffei AG, 8000 München Kettenspannvorrichtung
US4840437A (en) 1988-03-15 1989-06-20 Cadillac Gage Textron Inc. Dynamic track tensioning system for tracked vehicles
SE532710C2 (sv) * 2008-12-16 2010-03-23 Bae Systems Haegglunds Ab Anordning för manövrering av ett bandspännhjul hos ett bandfordon
DE202013002305U1 (de) 2013-03-11 2013-04-23 Rheinmetall Landsysteme Gmbh Gleiskettenspanner für ein Gleiskettenfahrzeug
US11667342B2 (en) 2019-10-03 2023-06-06 Deere & Company Active track-chain sag management systems for crawler vehicles

Also Published As

Publication number Publication date
DE102021120647A1 (de) 2023-02-09
AU2022326745A1 (en) 2023-11-23
WO2023016722A1 (fr) 2023-02-16
US20240246622A1 (en) 2024-07-25

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