DE3441520A1 - Device for grubbing stumps - Google Patents

Abstract

The invention relates to a device for grubbing stumps by means of a cutting sleeve which is positioned above the stump and is pressed in a rotating manner into the ground and, after cutting through the lateral roots, is extracted from the ground with the stump. <??>The aim of the invention is to be able to grub stumps in a fully mechanised manner with low outlay on machinery. At the same time, the object of the invention is mechanically to readjust known pipe turning devices, such as e.g. pipe clamps or pipe movement forks, according to the drilling progress without increasing the number of the drives present. In a device for grubbing stumps with a raisable and lowerable, rotationally driven cutting sleeve with a stump ejection device which has an ejection plate guided in the cutting sleeve, according to the invention supports are arranged on the ejection plate, which are guided through elongated holes of the cutting sleeve and have at their ends pull members, the pull members being connected to the pipe turning device.

Description

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• Title of the invention

Device for clearing stumps

Field of application of the invention;

The invention relates to a device for clearing stumps by means of a cutting sleeve positioned above the stump, which is pressed into the ground by turning and after cutting the side roots with the stump out of the ground is pulled out.

Characteristics of the known technical solutions

DE-AS 1265 482 describes a device that can be mounted on a vehicle for clearing stumps rotatably mounted cutting sleeve, which is located on a hydraulically operated lifting and lifting Lowering or tilting device is located. The cutting sleeve is driven by a pinion driven by a power take-off shaft of the vehicle rotated by means of a sprocket and chain. The one in the cutting sleeve arranged ejector consists of an ejector plate with the size of the inner cross-section of the cutting sleeve, which is axially guided by a rod in the cutting sleeve and by a Hydraulic cylinder is moved. A disadvantage of this solution is the high expenditure for the drive and power transmission means to see.

In the prospectus "Leichte Pfahlbohranlage LBA-7/1" of the institute for the technology and mechanization of the building academy of the GDR, the use of casing machines for drilling out Recommended by stumps in streets and parks. These casing machines point to moving the casing as in the DD-WP 142 490 described positive and non-positive in the drilling

pipe engaging bolts of a pipe moving fork on, over the one rotational movement and axial forces can be transmitted to the pipe

Change casing machines as described e.g. in DD-AP 64 424 have clamp links firmly surrounding the pipe by means of which axial tensile and compressive forces and torques transferred to the pipe.

When sinking or pulling the pipe, it is necessary to move the fork or clamp axially in accordance with the drilling progress. In the case of light devices as described in connection with DD- ¹ AT 142 490, this is done by hand or in the case of heavier drilling devices via hydraulic working cylinders arranged symmetrically to the pipe. The use of heavy drilling equipment to clear stumps would be uneconomical due to the high machine load. The operation of a light drilling rig described in DD-WP 142 490 requires, in addition to the machinist, e.g. when setting the pipe moving fork, the temporary use of other workers belonging to the drilling brigade. These workers are not required for other work when clearing stumps, so that even the use of light drilling equipment is adversely affected by unnecessary labor expenditure.

Object of the invention

The aim of the invention is to clear stumps in a fully mechanized way with less mechanical effort.

Essence of the invention

The invention is based on the object of the pipe turning device, E.g. the pipe clamp or pipe moving fork in devices for clearing stumps with a constant number mechanically readjusting the drives. In the case of a device for clearing stumps with a lifting and lowerable, rotating cutting sleeve with stump ejection device, which has an ejector plate guided in the cutting sleeve are, according to the invention, on the ejector plate arranged through elongated holes of the cutting sleeve carrier that is connected to the cutting sleeve via tension members

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known Pipe rotating device such as pipe movement clamp or fork are connected

The pipe turning device is formed by a circular ring carrier which is connected to the cutting sleeve by bolts

> and the connections for the hydraulic movement cylinders. The circular ring carrier is guided on the cutting sleeve by means of rollers and has support elements on its underside, which determine the minimum height of the ring carrier above the ground. The bearing for the hydraulics is located directly on the ejection plate Ejection cylinder arranged. The ejector plate is driven by guided by a pipe connected to the ejector plate, axially movable in the cutting sleeve by means of rollers. · With this Pipe are then connected to the! Rager for the tension members *

Embodiment

) The invention is explained in more detail below. The accompanying drawings show:

Fig. 1 A device arranged on a carrier device for clearing stumps

Pig · 2 A cut through the cutting sleeve and the circular ring carrier as well as the stump ejection device

The cutting sleeve 1 of the device for clearing stumps is connected with a clamping ring 2 to the extension space 15 of the carrier device. The cutting sleeve 1 is from the carrier device deposited over a tree stump 17 · Then the circular ring carrier 3 is inserted by inserting two bolts into the Locating bores 4 are positively connected to the cutting sleeve 1. Two hydraulic cylinders 16 move the circular ring carrier 3 oscillating. It can be done with the cantilever arm 15 of the carrier device a vertical compressive force can be exerted on the cutting sleeve 1 via the bearing ″ 5. and vertical forces, the root system is severed from the tree stump 17 by the cutting edge 6 of the cutting sleeve 1.

After the cutting sleeve 1 has penetrated by the length A in the root system, by pulling the two bolts of the circular ring carrier 3 from the mounting holes 4, the form-fitting Connection to cutting sleeve 1 released the tension members 7 attached to the beams. The beams are connected to the tube 18 of the ejector plate 10 and the one coupled to it hydraulic ejection cylinder 11 firmly connected and from the interior of the cutting sleeve 1 through axial slots 9 out in the cutting sleeve 1 to the outside. The guide of the ejector plate 10 with the carrier 8 is carried out by the rollers

12 on the inner wall of the cutting sleeve 1 · The circular ring carrier 3 is attached to the outer wall of the cutting sleeve 1 by the rollers

13 led.

After the ring carrier 3 has been raised by the tension members 7 by the length A, the bolts are inserted into the Next receiving bores 4 of the cutting sleeve 1, a positive connection is again established and the cutting sleeve 1 can be drilled again by the length A. Through the support elements 14 of the circular ring carrier 3, the lowest position is limited · After repositioning the circular ring carrier several times 3, the tree stump 17 is separated from the root system and jams in the cutting sleeve 1. The cutting sleeve 1 is with the trapped tree stump 17 is raised by the arm 15 of the carrier device. By extending the ejection cylinder 11 is the tree stump 17 from the ejection plate 10 pressed out of the cutting sleeve 1.

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List of the reference numbers used

1 Cutting sleeve 2 Clamping ring 3 Circular ring carrier 4th Mounting holes 5 camp 6th Cutting edge 7th Tension members 8th carrier 9 Elongated holes 10 Ejector plate 11th Ejector cylinder 12th roll 13th roll H Support element 15th Cantilever arm 16 Hydraulic cylinder 17th Tree stumps 18th pipe

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Claims (1)

Invention claims 1 device for clearing stumps with a liftable and lowerable, rotatingly driven cutting sleeve with stump ejection device, which is guided in the cutting sleeve Ejector plate, characterized in that on the Ejection plate (10) through elongated holes (9) of the cutting sleeve (1) are arranged supports (8) which are guided by tension members (7) with a known pipe turning device which can be connected to the cutting sleeve (1) in a non-positive or positive and non-positive manner such as a pipe movement clamp or fork are connected 2 · Device for clearing stumps according to claim 1, characterized in that the tube turning device is connected to the cutting sleeve (1) by means of bolts, the connections for the hydraulic cylinder (16) to have a circular ring carrier (3), which is on the cutting sleeve (1) by means of rollers (13) is guided and support elements on its underside (14) has, 3. Device for clearing stumps according to claim 1, characterized in that the ejection plate (10) is connected to a tube (18) guided by rollers in the cutting sleeve (1) and is provided with a bearing for the ejection cylinder (11). 4 · Device for clearing stumps according to claim 3 »marked in yellow in that the supports (8) are connected to the tube (18) For this purpose 2 sheets of drawings