Trailer for wood removal

 

The invention relates to agricultural and forestry machinery, namely, the technical means for transportation of goods in tight maneuvering in difficult road conditions. Trailer for transportation of wood includes a frame with supporting wheels which swivel in the horizontal plane is fixed towbar with twin steer cylinders. The point of connection of the cylinders to the shaft have a second degree of freedom about an axis and along a curved groove of the tiller. Piston chamber of the hydraulic cylinders are connected with a hydraulic or hydro-pneumatic accumulators, and rod cavity with the atmosphere. The technical result is increased reliability in the construction trailer, reducing the cost of operation while maintaining the maneuverability of the trailer in tight spaces in difficult road conditions in the forest. 2 Il.

The invention relates to agricultural and forestry machinery, namely, the technical means for transportation of goods in tight maneuvering in difficult road conditions under the forest canopy.

Known forest trailer, part of the hardware pogresnostj has one degree of freedom and no devices providing the forcible return of the wheels to straight trajectory after the turn of the trailer in difficult road conditions (gauge) /1/.

Known hitch trailer, we have made a prototype that includes a frame with supporting wheels which swivel in the horizontal plane is fixed drawbar with two cylinders double-acting, connected by hydrologically with battery, pump and lock /2/.

Control system coupling device includes an electronic unit, a power source, the angle sensor steered wheels and a number of other elements, allowing you to change the length of the drawbar in both automatic and manual modes. This control system hitch allows you to fit almost any curved path without operator intervention. However, the presence of such a large number of multiple links reduces the reliability of the design of the device, increases the cost of manufacture and operation.

The purpose of the proposed technical solution is to increase the reliability of the design of the trailer, reducing the cost of operation while maintaining the maneuverability of the trailer in tight maneuvering in complex d is thetsa fact, in the trailer for timber export, mainly under the forest canopy, comprising a frame with supporting wheels which swivel in the horizontal plane is fixed towbar with twin steer cylinders, the connecting points of the rods of the hydraulic cylinders to the shaft are two degrees of freedom about an axis and along a curved groove of the tiller, while the piston chamber of the hydraulic cylinders are connected with a hydraulic or hydro-pneumatic accumulators, and rod cavity with the atmosphere.

The essence of the invention is illustrated by drawings, where Fig.1 presents a trailer for removal of timber - side view of Fig.2 is a view along a-A.

The trailer consists of a frame 1, supporting wheels 2, the drawbar 3, join to work with the power tool. The shaft 3 is pivotally mounted on the frame 1 of the trailer and is connected by two hydraulic cylinders 4, pivotally attached to the frame 1 and the shaft 3. The connecting points of the cylinder 4 to the shaft 3 have two degrees of freedom around the axis 5 and a curved groove 6. Such design allows to mutually move the cylinders 4 if you pull one and the nomination of another rod. Piston cavity 7 of the cylinders 4 are connected by a hose 8 with two hydraulic (hydropneumatically trailer for wood removal is as follows.

When moving the machine along a curved path under the action of lateral soil reaction wheels, trailer hitch 3 will seek to develop in the direction of the center of rotation, i.e., push the stem of one of the cylinders 4, reducing his rod cavity 7. The working fluid (gas) hydroline 8 will be squeezed out in the hydraulic (pneumatic) battery 9, thereby empowering him. At this time, the piston rod of the second cylinder will be relatively free to move, because the point of its connection to the shaft 3 has two degrees of freedom around the axis 5 and a curved groove 6 of the tiller, and the corresponding hydraulic (pneumatic) battery 9 will not resist. With the increase of turning radius (straight line trajectory) the shaft 3 of the trailer under the action of lateral soil reaction and the energy accumulated in the respective hydraulic (pneumatic) battery 9, will return in the direction of the pulling force. The selection of parameters of hydraulic (pneumatic) battery it is possible to achieve maximum compliance of the trajectory of the wheels of the trailer to the motion path of the wheels of the tractor (in some average conditions). Without turning the water is liquid wood (which occurs every minute) under the wheels causes them to get stuck in a certain position and the tractor just pulling a trailer, tearing the ground.

The application of the proposed trailer for wood removal will increase the reliability of performing a process to reduce operational costs while maintaining the maneuverability of the trailer in tight spaces under the forest canopy and on the technological corridors in difficult road conditions.

Sources of information

1. Equipment for loading and transport trailer PARKS-1. The prospectus of JSC "Velikoluksky plant Leskhozmash".

2. Patent RU No. 2094282, CL 62 D 53/00; 60 D 145, 1/155, 27.10.97 "Hitch trailer" (prototype).

Claims

Trailer for wood removal is mainly under the forest canopy, comprising a frame with supporting wheels which swivel in the horizontal plane is fixed towbar with twin steer cylinders, characterized in that the attachment points of the cylinders to the shaft are two degrees of freedom about an axis and along a curved groove of the tiller, while the piston chamber of the hydraulic cylinders are connected with a hydraulic or hydro-pneumatic accumulators, and rod cavity with the atmosphere.



 

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Coupler for trailer // 2342258

FIELD: transport.

SUBSTANCE: coupler contains means for installation on trailer with capability of pivot-hinged turn of at least one left wheel and at least one right wheel, independent means of pivot-hinged turn of trailer and prime mover coupling, means for performing differential turn of wheels and trailer with regard to prime mover in process of turn performed by prime mover. Limiting device is made so as to limit magnitude of wheel turn as compared with wheel turn related to trailer in absence of limiting device. Limiting device contains follower with front end connected with said devices for installation of wheels on trailer and rear end. Follower includes protruding coupling sphere on rear end or near it. Limiting device additionally includes slider guide made so as to couple with prime mover and installed in parallel with or inclined to prime mover and trailer chassis. Coupling sphere is installed with ability to move along slider guide of limiting device in process of prime mover movement.

EFFECT: securing of smooth and safe turning and exclusion of folding effect.

17 cl, 18 dwg

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