RU2161399C2 - Brush cutter - Google Patents

Abstract

FIELD: agriculture and forestry. SUBSTANCE: brush cutter has frame, cart mounted within frame for horizontal displacement along frame guiding beams by hydraulic cylinder. Boom with working tool drive reducer is pivotally mounted on cart. Brush cutter is provided with hydraulic cylinders for lifting frame with working tool in vertical plane. Working tool fixed on reducer shaft and driven by hydraulic engine is pivotally mounted on boom to be inclined together with reducer in vertical plane by hydraulic cylinder through angle corresponding to angle of slope of channel. Such construction allows brush to be cut at required height and in places difficult for access. EFFECT: increased efficiency and simplified construction. 2 cl, 4 dwg

Description

 The invention relates to a device for cutting shrubbery during thinning and when removing shrub along the channels.

 A device is known (see Borschev TS, Liflandsky V.Sh., Telegin Yu.A. "Mechanization and technology of cultural works." // L .: Lenizdat, 1971, 159 p., Pp. 16-18 ) to remove shrubs and light forests, hung on the tractor's hitch system and consisting of an active working body - a disk cutter, an arrow, a rear bracket, and a hydraulic system. The drive of the working body is carried out by a transmission system from the tractor power take-off shaft. The hydraulic system transfers the boom with the working body from the worker to the transport position. The working feed of the brush cutter is carried out by the movement of the tractor.

 A disadvantage of the analogue is that the feed of the disk cutter is carried out by the movement of the tractor, and this leads to significant lateral loads on the working body. In addition, this device cannot change the cutting height of the shrub, as the brush cutter has only one fixed working position.

 The prototype of the proposed device is an aggregate for cutting trees and shrubs (ed. St. N 160401, IPC A 01 D, 35/14, September 8, 1967). It consists of a welded structure frame, supported by two skis and hung on a tractor hitch system. On the frame are two working bodies in the form of circular saws mounted on vertical shafts and driven by a tractor PTO. The central working body is mounted directly behind the tractor, and the second working body is mounted on the side - on the edge of the brush cutter frame. The feed of the working body when cutting the bush is carried out by the movement of the tractor.

 The disadvantage of the prototype is also a method of feeding a circular saw by the movement of the tractor, leading to the occurrence of lateral loads and pinching of the working body, to increase the oscillations of the saw blade during operation of the unit. In addition, on this brush cutter it is not possible to adjust the cutting height of the bush directly during operation of the unit.

 An object of the invention is to achieve the possibility of high-quality cutting of shrubs at the required height and in inaccessible places.

 The task is achieved in that in the brush cutter containing the frame, the working body in the form of a circular saw, this working body is installed with the possibility of horizontal supply by moving inside the frame of the brush cutter of the truck, on the edge of which the arrow with working equipment is pivotally mounted, and with the possibility of vertical movement of the working body hydraulic cylinders lifting the brush cutter frame. When cutting the shrub inside the channels, the hydraulic drive of the working equipment is used, which provides for the installation of an arrow with a hydraulic cylinder that provides a tilt of the gearbox with the working body in a vertical plane to an angle corresponding to the angle of inclination of the slope of the channel.

 The difference between this device and the prototype is to replace the feed of the working body with the movement of the tractor by feeding the trolley with rollers and working equipment with a hydraulic cylinder along the guide beams of the brush cutter frame when the tractor stops. In addition, on this brush cutter, you can adjust the cutting height of shrubbery directly in the process. The use of a hydraulic drive of the working equipment allows you to cut the shrub inside the channels.

 In FIG. 1 is a schematic illustration of a brush cutter having a mechanical drive; in FIG. 2 - the same in section AA; in FIG. 3 - brush cutter having a hydraulic drive; in FIG. 4 - the same in section AA.

 The brush cutter consists of a frame fixed to the tractor hitch system 1 and including a hitch frame 2, as well as guide rails 3. The tie rods 4 are installed in the upper part of the brush cutter frame in the form of pins. They provide additional structural strength and protect the drive mechanism from falling shrubs. A trolley 6 with rollers 7 is mounted inside the frame with the possibility of reciprocating movement by means of a hydraulic cylinder 5. An arrow 8 is mounted pivotally to the trolley 6 with the possibility of turning into the transport position, with a gear 9 of the drive for cutting the saw blade working on its edge 10. Drive of the working gear reducer body can be carried out both from the tractor power take-off shaft through two telescopic driveshafts 11, 12 and the intermediate gearbox 13, and from the hydraulic motor 14 mounted on the boom 8 (Fig. 3).

 The mechanical drive provides for an elastic 15 and 16 safety clutch. You can use a telescopic cardan gear 12 with a safety clutch located inside the gear.

 In the rear part of the brush cutter frame, in the guide bushings 17, support wheels or skis 18 are installed with the possibility of changing the cutting height of the shrub with hydraulic cylinders 19. To prevent the branches of the undersized shrub from being wound onto the drive shaft, a casing 20 is used. The working body is equipped with a spring tab 21 that presses the file bush and throws it off the saw blade.

 With the hydraulic drive of the circular saw, the working equipment can be pivotally mounted on the boom 8. This will tilt the saw blade 10 to the required angle by means of the hydraulic cylinder 22 mounted on the boom 8, and will allow the working body to be lowered into the channels when cleaning them from the bush.

 The brush cutter works as follows. When cutting a bush, the driver first sets the cutting height of the bush with hydraulic cylinders 19, and then turns on the drive of the disk tool 10. In this case, the rotation is transmitted from the tractor power take-off shaft via a telescopic cardan gear 11 and an elastic coupling 15 to the shaft of the intermediate gearbox 13 mounted on the trolley 6. This bevel gear transmits rotation through the safety clutch 16 and the second removable cardan gear 12 of the gear 9 of the drive of the circular saw working body 10.

 Cutting of small bushes is carried out by the movement of the tractor. When cutting a large shrub, the driver stops the tractor in the immediate vicinity of the bush, sets the brush cutter frame with hydraulic cylinders 19 to the required height and turns on the drive of the working body. In this case, the supply of a circular saw 10 is carried out by a hydraulic cylinder 5, which is installed to move the trolley 6 with rollers 7 along the guide rails 3. The feed of the working body can be carried out both in the direction of the tractor and away from it. Cutting off the bush, the driver puts the cart 6 in its original position. At the next combination of the disk saw working body 10 with a sheared bush, the process is repeated.

 When cutting the bush in the channels with a brush cutter equipped with a hydraulic drive, the driver first lowers the working body with the hydraulic cylinder 22 into the channel at the required angle. To transfer the hinged brush cutter to the transport position, the boom 8 with the gearbox 9 of the drive of the working body is retracted 90 degrees and fixed.

 The possibilities of a brush cutter can be expanded by using it for felling trees, using pushing means and devices.

 The use of this machine will eliminate the laborious and ineffective manual labor when cutting shrubs along drainage channels, to increase productivity when performing this operation. The advantage of the brush cutter is also that it can be used both hydraulic and mechanical drive of the working equipment.

Claims (2)

 1. A brush cutter, including a raised and lowered frame supported by a tractor hitch system, a working body in the form of a circular saw, characterized in that a trolley is installed inside the brush cutter frame with the possibility of horizontal movement along the guide beams of the frame, and an arrow is pivotally mounted on the trolley gear drive of the working body, while the brush cutter is additionally equipped with hydraulic cylinders for lifting the frame with the working body in the vertical direction.  2. The brush cutter according to claim 1, characterized in that the working body, mounted on the shaft of the gearbox and driven by a hydraulic motor, is pivotally mounted on the boom with the possibility of tilting it together with the gearbox in a vertical plane at an angle corresponding to the angle of inclination of the channel slope, by means of a hydraulic cylinder .

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