• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The vehicle trailer according to the invention, in particular a return trailer for forestry operation, has a hydraulically steerable drawbar (4) for attachment to a towing vehicle, which is also supported on at least one spring element vertically movable and height adjustable on a frame (1).
    公开号:AT516017A2
    申请号:T50602/2015
    申请日:2015-07-09
    公开日:2016-01-15
    发明作者:
    申请人:Pfanzelt Maschb Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a vehicle trailer, in particular a forward trailer for the forestry operation, with a hydraulically steerable drawbar for attachment to a towing vehicle.
    The maneuvering of vehicle trailers in confined spaces is often tedious. In order to increase maneuverability on difficult terrain, therefore, some trailers with hydraulically steerable drawbars (DE 20 2012 102 173 Ul) are equipped, which allow lateral pivoting of the drawbar, so as to be able to correct small errors in reversing, without having to maneuver.
    Furthermore, from DE 20 2012 102 356 Ul a trailer vehicle with a designed as a modular unit articulated drawbar known.
    The invention is based on the object to further improve the handling of a vehicle trailer with hydraulically steerable drawbar.
    According to the invention, this object is solved by the features of claim 1.Accceptive embodiments are the subject matter of the further claims.
    The vehicle trailer according to the invention, in particular a rear trailer for the forestry operation, has a hydraulically steerable drawbar for attachment to a towing vehicle, which is further supported on at least one spring element vertically movable and adjustable in height on a frame.
    The sprung drawbar increases ride comfort or driving safety in poor road conditions. The suspension of the drawbar also has a gentle effect on the vehicle trailer, the towing vehicle and not least also on the driver. In addition, under difficult conditions, it is more likely to prevent the vehicle trailer from rocking, so that overall higher speeds are also possible.
    With a height-adjustable drawbar, the vehicle trailer can also be coupled easily and safely to the towing vehicle even if the vehicle trailer has no hydraulic support (s).
    If the chassis of the vehicle trailer is arranged in a central region, lowering the drawbar causes lifting of the stern and raising the drawbar causes the heel to lower. In this way, at the rear of the vehicle trailer, a second trailer or
    Equipment such as a tipper body or other equipment (eg a wood splitter) can be easily coupled or uncoupled for transport without the need for a rear lift.
    In addition, raising and lowering the drawbar can increase the ground clearance and the mobility. It can be increased by lifting the drawbar at critical points, such as when driving over hills, the ground clearance between the chassis and hitch. When driving through a tight bend in a ditch or on a slope, both the height adjustment of the drawbar and the steering of the drawbar is used. Both measures complement each other in this driving situation, thereby avoiding casual maneuvering.
    Furthermore, by lowering the drawbar, the ground clearance in the area between the chassis and the rear can be improved. Finally, at low crossings, it is possible to reduce the height of the vehicle trailer by lowering the drawbar.
    When overcoming steep slopes, as is the case, for example, when changing from a return lane to a forest path, an unfavorable alignment of the drawbar often leads to overstressing between the towing jaw and the drawbar eye. This can be avoided by a height adjustment of the drawbar, which increases the life of the components.
    If the forestry trailer is equipped with a loading crane, there is the problem that the crane column is aligned obliquely with increasing or decreasing infrastructure. It has therefore schsch a so-called Krantilt proposed, with the help of the crane column can be re-aligned vertically. However, the effect of the cantilever can also be achieved by height adjustment of the drawbar according to the invention, so that an additional cantilever can be dispensed with.
    For some applications, such as forestry, a large soil-free extremity is important. Accordingly, the attached to the drawbar treads to climb the vehicle trailer are usually in relatively high altitude. Thanks to the lowerable drawbar, the step height can be reduced at the push of a button, thus facilitating the ascent to the vehicle trailer, for example to a crane or operating station located there.
    To enable the damped, vertical mobility of the drawbar this is pivotally mounted on the frame about a Querachse. The at least one spring element is preferably formed by a hydraulic suspension cylinder. When loading the vehicle trailer with a crane on the trailer, it is advantageous if the damped, vertical mobility of the drawbar is blocked by a first locking device. The first locking device can be formed for this purpose, for example, by a hydraulic valve.
    To enable steerability of the drawbar, it is pivotally mounted on the frame about a vertical axis, at least one hydraulic steering cylinder being provided between the frame and the drawbar. When driving on public roads, the pivotability of the drawbar must be blocked by preferably mechanically locking the hydraulic steering cylinder by a second locking device.
    Although the drawbar described above may find application in vehicle trailers of any kind, a preferred use in a trailer for forestry work is seen because there are the additional benefits of a damped vertically movable and adjustable in height drawbar in particular advantage.
    Further embodiments of the invention will be explained in more detail with reference to the following description and the drawing.
    1 is a three-dimensional view of a vehicle trailer according to the invention,
    2 is a plan view of the drawbar in the straight ahead position,
    3 is a plan view of the drawbar in a laterally pivoted position,
    4 is a side view of the drawbar in a first vertical position and FIG. 5 is a side view of the drawbar in a second vertical position.
    The vehicle trailer shown in Fig. 1 is designed as a trailer, which is used inForstbetrieb for loading and unloading logs. It essentially comprises a frame 1, a chassis 2 attached thereto, a loading basket 3 mounted on the frame and a drawbar 4. The drawbar 4 is mounted at its rear end about a vertical axis 5 hinged to the frame 1 and has at the front end of a towing eye 6 for coupling the vehicle trailer to a towing jaw or a trailer hitch of a tractor, not shown, for example, formed by a tractor. In the plan view of Fig. 2, the drawbar 4 is aligned straight forward, while in Fig.3 is pivoted laterally.
    The pivoting movement is effected by at least one hydraulic steering cylinder 7 (FIG. 1), which is expediently drivable in the towing vehicle. If only one steering cylinder is provided, it is designed as a double-acting hydraulic cylinder in order to be able to execute the pivoting movement on both sides. In contrast to a freely rotatable bogie, the angle α of the drawbar 4 with respect to the longitudinal axis 8 can be adjusted by the hydraulic steering cylinder. By means of a locking device (not shown in detail), the drawbar in the basic position shown in FIG. 2 can be blocked in a suitable manner, for example mechanically.
    In addition to the lateral pivoting the drawbar is still pivotable about a transverse axis 9 by means of a hydraulic Federungszylinders 10. To realize the swivelability about the vertical axis and the transverse axis, the drawbar 4 is provided at its end opposite the pull eye 6 with a joint head 13, which is articulated to the frame 1 about the vertical axis 5 and provides the joint for the transverse axis 9 via two joint flanges 13.1 and 13.2. The drawbar 4 is pivotally connected to the two articulated flanges 13.1 and 13.2. The hydraulic suspension cylinder 10 is coupled at one end to two flanges 13.3, 13.4 of the condyle 13 and at the other end to the drawbar such that actuation of the hydraulic suspension cylinder 10 causes rotation of the drawbar 4 about the transverse axis 9.
    In the illustrated embodiment, the trained as a trailer trailer vehicle trailer is equipped with a crane 11 and laterally extendable crane supports 12 (Fig. 1). When the backhoe is uncoupled from the towing vehicle and is supported by its crane supports, the drawbar can be raised or lowered with the hydraulic suspension cylinder 10 about the transverse axis 9 at its forward end having the towing eye 6 (Figures 4 and 5) coupled to the drawbar eye 6 on the towing vehicle, this connection acts as a fiducial point and actuation of the hydraulic suspension cylinder 10 through the connection to the frame 1 results in raising or lowering the rear end of the drawbar and the associated front part of the frame. The vehicle trailer thus rotates about its chassis so that raising the front part of the frame 1 simultaneously causes the rear end of the frame to lower. In the reverse direction, lowering the front end of the frame by correspondingly driving the suspension cylinder 10 causes lifting of the rear end of the frame.
    When loading the vehicle trailer, the suspension of the hydraulic suspension cylinder 10 is not desired, so that it can be blocked or blocked with a locking device, not shown in detail, for example in the form of a hydraulic valve. This allows a quiet vehicle trailer and precise crane driving. A lowering of the drawbar also allows a level control to load larger logs at a given pivoting moment of the crane can.
    The lowerable drawbar also allows the use of crane supports with a correspondingly lower travel. If the adjustment distance of the hydraulic suspension cylinder 10 is sufficiently large, it may even be possible to dispense with hydraulically actuable crane supports 12.
    From Fig. 1 also steps 14 for the control of the crane 11 can be seen. In order to facilitate the climbing of the control stand, the drawbar can be lowered, wherein the control of the drawbar should be expediently possible both the towing vehicle and the vehicle trailer.
    权利要求:
    Claims (9)
    [1]
    1. Trailer with a hydraulically steerable drawbar (4) for attachment to a vehicle, characterized in that the drawbar (4) via at least one spring element damped vertically movable and adjustable in height on a frame (1) is supported.
    [2]
    A trailer according to claim 1, characterized in that the at least one spring element is constituted by a hydraulic suspension cylinder (10).
    [3]
    3. Vehicle trailer according to claim 2, characterized in that for blocking the damped, vertical mobility of the drawbar (4) a first locking device for the hydraulic suspension cylinder (10) is provided.
    [4]
    A trailer according to claim 3, characterized in that the first locking device is formed by a hydraulic valve.
    [5]
    A trailer according to claim 1, characterized in that the drawbar (4) is pivotally mounted on the frame for permitting the damped vertical mobility of the drawbar about a transverse axis (9).
    [6]
    A trailer according to claim 1, characterized in that the drawbar (4) is pivotally mounted on the frame about a vertical axis (5) for steering, and at least one hydraulic steering cylinder (7) is provided between the frame (1) and the drawbar (4).
    [7]
    7. Trailer according to claim 6, characterized in that for blocking the pivoting of the drawbar (4) about the vertical axis (5), a second locking device for the hydraulic steering cylinder (7) is provided.
    [8]
    A trailer according to claim 6, characterized in that the second locking device is formed by a mechanical locking device.
    [9]
    9. Trailer according to claim 1, characterized in that the vehicle trailer is formed by a trailer for forestry work.
    类似技术:
    公开号 | 公开日 | 专利标题
    DE60305348T2|2007-04-19|TRAILERS FOR RETRACTORS FOR A TRAIN VEHICLE, SYSTEM COMPRISING A TRAILER AND A TOWING VEHICLE, AND METHOD FOR STEERING A TRAILER AT ONE TURN
    DE102015111095B4|2019-11-14|Vehicle trailer with a hydraulically steerable drawbar
    EP2917070B1|2016-03-23|Heavy-load transport vehicle for transporting an elongated object
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    EP2660127B1|2017-06-21|Running gear unit and modular unit for a tugger train
    DE2950121A1|1981-06-19|Close coupled lorry and trailer - have telescopic drawbar with lateral guide under rear of lorry
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    EP3143861B1|2019-08-21|Agricultural mower and trailer and method for operating the mower
    DE202004001249U1|2004-03-18|Agricultural trailer, has wheels mounted on front and rear frames movable along cross direction guides
    EP0259801B1|1991-01-30|Hitching device for an agricultural tractor
    EP0081190B1|1987-04-01|Vehicle trailer with a coupling swiveling sideways
    DE2641807C2|1986-08-14|Vehicle for transporting and laying bridge parts
    DE2055386C3|1981-02-12|Multi-blade tractor-mounted plow
    EP0122527B1|1988-11-30|Vehicle trailer
    EP0270096B1|1990-12-12|Snow track vehicle with a tool carrier
    DE423901C|1926-01-13|A motorized plow consisting of a two-wheeled motorized cart with attached tillage equipment
    EP0381926A2|1990-08-16|Trailer hitch for agricultural vehicles, especially trailers
    EP1782674B1|2008-10-22|Mowing machine
    DE202020107319U1|2021-01-18|Field sprayer
    DE1655267A1|1971-01-21|Tractor with extendable chassis
    DE4208787C2|1995-02-16|Sweeper
    DE1455504C3|1974-11-21|Coupling device for hitching a vehicle to a towing vehicle equipped with a power lift
    DE1151968B|1963-07-25|Support strut for the lower linkage of agricultural tractors
    DE3902003A1|1990-07-26|COUPLING DEVICE FOR AN AGRICULTURAL MACHINE
    同族专利:
    公开号 | 公开日
    AT516017A3|2016-04-15|
    DE102015111095A1|2016-01-21|
    DE102015111095B4|2019-11-14|
    DE202014103251U1|2014-07-23|
    AT516017B1|2016-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AT516189A3|2014-08-25|2016-06-15|Münz-Fahrzeugbau Gmbh & Co Kg|Drawbar for a trailer|DE1582169A1|1967-03-07|1970-08-20|Deere & Co|Harvest recovery machine, especially field harvester|
    DE3148041C2|1981-12-04|1987-08-27|Hans 8939 Tussenhausen De Ruf|
    DE102011055206A1|2011-11-10|2013-05-16|Gkn Walterscheid Gmbh|Drive train between the PTO of a tractor and the drive gear of a trailer vehicle|
    DE202012102173U1|2012-06-13|2012-07-04|Pfanzelt Maschinenbau Gmbh|Hydraulic brake system with an overrun device|
    DE202012102356U1|2012-06-26|2013-09-27|Georg Krassort|Trailer vehicle with articulated drawbar|CN105564506B|2016-02-23|2018-10-26|东北农业大学|A kind of multi-axle trailer wheel follow-up steering sensing and controlling device|
    DE102017101724A1|2017-01-30|2018-08-02|Rudolph & Sohn Gmbh Fahrzeug- Und Maschinenbau|Device for coupling a tractor with a trailer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201420103251|DE202014103251U1|2014-07-15|2014-07-15|Vehicle trailer with a hydraulically steerable drawbar|
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