Excavator Mounted Tree Shredder

Abstract

To provide an excavator mounted tree shredder that can crush trees and shrubs at high speed.SOLUTION: By mounting the excavator mounted tree shredder to an excavator arm as a link connection portion, work in a work site where it is difficult for general vehicles or people to approach becomes easier. In addition, by detachably mounting a crushing blades to a mounting recessed part of a circular plate vertical flange fixed so that the mounting recessed part is arranged helically on an outer peripheral surface of a horizontal rotor shaft, not only trees with thick trunks and thin shrubs can be crushed at high speed but also a load on the horizontal rotor shaft can be distributed to prevent vibration. Furthermore, by selecting and adjusting a height of a rear cover member according to a work object, i.e., a tree or shrub, to be processed by the shredder, an effect of recycling crushed matter by discharging it to the front is provided.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tree crusher mounted on an excavator, and more specifically, it is configured to be mounted on an excavator arm so that trees and weeds can be crushed at high speed on steep slopes, mountains, hilly areas, orchards, water channels, drainage channels, farm roads, road shoulders, etc., where it is not easy for general vehicles or people to approach.

Background Art

[0002] Generally, for weed control work to remove weeds and miscellaneous trees that grow vigorously in summer, the operator manually holds or carries a lawn mower equipped with an engine weighing about 10 to 20 kg. Not only does the heavy equipment make it easy for the operator to feel fatigued, but the heavy load also slows down the work speed and makes it impossible to perform a large amount of work. Therefore, the need for a large number of workers has emerged as an inevitable problem. Also, when using a mechanical lawn mower, stones are bounced back by the rotating cutting blade at high speed, resulting in frequent accidents for the operator. Since the motor capacity is small, there are limitations in the work efficiency of removing vegetation and pruning branches.

[0003] Recently, in order to solve such problems, after mounting a lawn mower on the bumper of a general vehicle, etc., the power source of the vehicle is used to more effectively remove vegetation in various places.

[0004] However, such a vehicle-mounted weeding machine performs weeding work restrictively only in areas where the vehicle can enter, and its application range is very narrow. That is, there is a problem that weeds and miscellaneous trees growing in special areas such as marshes, pastures, mountains, chestnut fields, wetlands, and hilly areas where vehicle entry is impossible cannot be removed.

[0005] Prior arts related to weeders capable of performing weeding work in such special areas are provided by Korean Patent Publication No. 10-2012-0019093 (Title of the Invention: Rotary-Type Vegetation Removal Device Using an Excavator) and Korean Patent Publication No. 10-2016-0026115 (Title of the Invention: Weeding Machine for an Excavator).

[0006] In a rotary-type vegetation removal device using such a prior art excavator, which is attached to a normal excavator equipped with multi-joint links and includes vegetation removal means having a link connecting portion so as to be attached to a bucket attachment portion at the tip of the multi-joint links, the vegetation removal means includes a main body in which the link connecting portion is connected and joined at the upper center to form an appearance, a drive motor provided on one side of the main body, to which high-pressure hydraulic oil is transmitted from a hydraulic supply system provided in a normal excavator, and which is supported at both ends in the main body so as to receive a driving force and rotate, and a horizontal rotor shaft, and a number of blade portions each including a blade fastened and assembled so as to correspond one-to-one to a number of blade mounting portions formed at regular intervals on the rotor shaft.

[0007] Such prior art can be operated in various operation modes according to the working conditions of the mine-laying prediction area through the vegetation removal means attached to the excavator, and thus can be used not only as equipment for surface inspection capable of pre-judging the presence or absence of mine-laying, but also has the effect of being usefully operated as equipment for removing weeds and grass in a terrain with thick vegetation where it is difficult for people to approach.

[0008] However, such prior art has a structure in which the tips of two plates combined with the structure of the blades attached to the blade mounting portions arranged according to the rotational curvature on the outer peripheral surface of the rotor shaft are bent and spread left and right, which is suitable for removing weeds and grass, but has limitations in work efficiency and is not easy for crushing operations such as thick trees.

[0009] In addition, a weeding machine for an excavator in the prior art includes a fixed frame formed of a rectangle, a fastening member that is detachably installed on one side of the upper surface of the fixed frame and is fastened to the tip of the operating arm of the excavator, a cutting member having a plurality of cutting blades provided on a drum and having a rotary shaft portion rotatably connected to support bands installed below both side ends of the fixed frame, a driven pulley provided on one rotary shaft portion of the cutting member and a driving pulley connected by a belt, a rotary power unit installed on one side of the upper surface of the fixed frame and having a driving shaft portion transmitting rotary power to the driving pulley through a guide roll, and the rotary power unit being characterized in that hydraulic pressure is supplied from a hydraulic source of the excavator.

[0010] Such prior art allows a weeding machine to be attached to the tip of the operating arm of an excavator so that weeding work can be performed, can increase weeding efficiency with stable rotary power, includes a fastening member that can be detached and attached to a weeding machine body equipped with a plurality of cutting blades, can be attached to the tips of operating arms of different types and sizes of excavators, and has an eccentric installation of the fastening member on the weeding machine body to enable weeding over a wide radius and effectively remove weeds on slopes and at high positions as well.

[0011] However, such prior art has a limitation in work efficiency in that the cutting blades arranged at regular intervals on the outer peripheral surface of the drum are suitable for removing weeds and grass and are not easy for crushing thick trees and the like.

Prior Art Documents

Patent Documents

[0012]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0013] The present invention has been devised to solve such conventional problems. The object of the present invention is to attach a link connecting portion to an excavator arm so that work can be easily carried out at a work site where it is not easy for a general vehicle or a person to approach, and to attach a crushing blade so that it can be spirally separated from a horizontal rotor shaft, and to provide an excavator-mounted tree crusher configured to be able to crush trees and shrubs at a high speed.

[0014] Another object of the present invention is to discharge the crushed materials generated during the crushing operation of trees and shrubs to the front, collect them, and make them reusable.

Means for Solving the Problems

[0015] Means for solving the problems in order to achieve such an object include a horizontal plate with a link connecting portion connected to an excavator arm mounted on one side of the upper part, and a main body composed of the front panel and the rear panel bent and formed on the front and rear surfaces of the horizontal plate; First and second side houses that are vertically finished at both ends of the horizontal plate, the front panel, and the rear panel, with skids fixed to the lower ends, a space formed on the outside, both ends of a curved blocking plate fixed between the upper inner surfaces, and an upper space and a crushing space formed; A rotor that is axially installed so as to rotate as a rotating member in the crushing space between the first and second side houses and that crushes trees and shrubs; An extension house integrally formed on the upper part of the horizontal plate so that a connecting space is formed to communicate with the space of the first side house, and a hydraulic piston motor that is mounted so as to be separable and rotatable as an assembly member and that operates by the oil pressure supplied from an excavator to rotate the rotor as a power transmission member; It is characterized in that it is composed of a rear cover member that is mounted so as to be able to adjust the height of the rear panel of the main body and that blocks the crushing space so that the crushed materials are discharged to the front.

Effects of the Invention

[0016] According to the present invention, by mounting it as a link connection part on an excavator arm, work in a work place where it is not easy for general vehicles or people to approach becomes easy. Further, the crushing blade is mounted on the mounting recess of the circular plate vertical flange fixed so that the mounting recesses are arranged spirally on the outer peripheral surface of the horizontal rotor shaft, and thick-trunked trees and non-thick weeds can be crushed at high speed. In addition, the load on the horizontal rotor shaft can be dispersed to prevent vibration. Further, the height of the rear cover member is selected and adjusted according to the work object to be worked on by the crusher, that is, trees and weeds, and the effect of discharging to the front and being reusable is provided.

Brief Description of the Drawings

[0017]

Figure 1

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Figure 12

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0019] Among the attached drawings, FIGS. 1 and 2 are perspective views showing the overall structure of the excavator-mounted tree crusher according to the present invention, FIG. 3 is an exploded perspective view of the excavator-mounted tree crusher according to the present invention, FIG. 4 is a side view of the concave portion of the excavator-mounted tree crusher according to the present invention, and FIGS. 5 and 6 are perspective views showing the rotor of the excavator-mounted tree crusher according to the present invention.

[0020] As shown in FIGS. 1 to 6, the excavator-mounted tree crusher according to the present invention includes a horizontal plate (12) having a link connection portion (11) connected to an excavator arm (1) mounted on one side of the upper part, and a main body (10) composed of a front plate (13) and a rear plate (14) bent and formed on the front and rear surfaces of the horizontal plate (12); The first and second side houses (20) and (21) are vertically finished at both ends of the horizontal plate (12), the front plate, and the rear plates (13) and (14), a skid (22) is fixed to the lower end, spaces (20a) and (21a) are formed on the outside, both ends of a curved partition plate (23) are fixed between the inner side surfaces of the upper part, and an upper space (24a) and a crushing space (24b) are formed; A rotor (30) that rotates as a rotating member (50) in the crushing space (24b) between the first and second side houses (20) and (21) for crushing trees and weeds; An extension housing (61) integrally formed on the upper part of the horizontal plate (12) is formed with a connecting space (61a) so as to communicate with the space (20a) of the first side housing (20). An assembly member (70) is detachably mounted thereon, and it is composed of a hydraulic piston motor (60) that operates by the oil pressure supplied from an excavator and rotates a rotor (30) as a power transmission member (80).

[0021] A rear cover member (90) is mounted on the rear plate (14) of the main body (10) so that its height can be adjusted, and the rear surface will be selectively blocked so that the crushed materials generated during operation are discharged to the front.

[0022] The rotor (30) includes a horizontal rotor shaft (31) axially installed to rotate as a rotating member (50) between the first and second side housings (20) (21); a number of circular plate vertical flanges (33) having a central hole (32) formed in the central region so as to be inserted and fixed at equal intervals on the outer peripheral surface of the horizontal rotor shaft (31); mounting recessed portions (34) formed horizontally and obliquely on both outer peripheral edges so as to communicate with the central hole (32) of the circular plate vertical flange (33) and arranged in a spiral shape; and rotor blade members (40) detachably mounted on the outer peripheral surface of the horizontal rotor shaft (31) and the mounting recessed portions (34) of the circular plate horizontal flanges (33) for crushing trees and weeds.

[0023] The rotor blade member (40) includes a number of blade mounting blocks (42) having an end fixed to the outer peripheral surface of the horizontal rotor shaft (31), an upper part fixed to the horizontal part of the mounting recessed portion (34), and an inclined assembly protrusion (41) having a block through hole (41a) formed in the lower part; a crushing blade (45) having an inclined fitting concave groove (43) formed in the upper part and coupled to the inclined assembly protrusion (41) of the blade mounting block (42), and a crushing recess (44) having a blade through hole (44a) facing the block through hole (41a); and a fastening long bolt (46) and a nut (47) that are fastened and fixed through the blade through hole (44a) and the block through hole (41a) for detachably mounting the crushing blade (45).

[0024] The rotating member (50) includes an assembly through-hole (51) formed corresponding to the first and second side housings (20) and (21); an inner bearing assembly (53) that is coupled to the assembly through-hole (51) through the space (20a) outside the first side housing (20) and has a bearing (52a) built therein; and an outer bearing assembly (55) that is coupled to the assembly through-hole (51) through the space (21a) outside the second side housing (21), has a bearing (54a) provided therein, and is concealed as a circular cover (56) fastened to the outer surface.

[0025] The assembly member (70) includes an assembly through-hole (71) formed in the extension housing (61); an inner flange (72) that is fastened and fixed to the extension housing (61) on the outer surface of the assembly through-hole (71) and has an assembly hole (72a) formed to face the assembly through-hole (71); an upper bearing assembly (74) that is inserted into the assembly hole (72a) of the inner flange (72) so as to protrude inward and is fastened and fixed, and has a bearing (73) provided therein; an external connection shaft (75) that is axially installed so as to rotate inside the upper bearing assembly (74) from the outside; and a motor shaft (76) that is axially installed so as to rotate on a hydraulic piston motor (60) fastened and fixed to the inner surface of the upper bearing assembly (74) and is coupled to the external connection shaft (75).

[0026] The power transmission member (80) includes a lower pulley (82) axially installed on one outer peripheral surface of the horizontal rotor shaft (31) of the rotor (30); an upper pulley (84) axially installed on the outer peripheral surface of the external connection shaft (75); and a connection belt (86) that is connected between the lower pulley (82) and the upper pulley (84) and transmits the rotational force of the hydraulic piston motor (60) to the horizontal rotor shaft (31).

[0027] At this time, a blocking cover (88) is fastened and fixed to the first side housing (20) and the extension housing (61) to conceal the power transmission member (80).

[0028] The rear cover member (90) includes a square recessed portion (91) formed to communicate with the crushing space (24b) in the back plate (14); Vertical reinforcing strips (92) fixed to face the back plate (14) on both outer sides of the square recessed portion (91); A horizontal reinforcing strip (94) fixed to the back plate (14) between the vertical reinforcing strips (92) and having a number of assembly screw holes (93a) formed while maintaining a horizontal interval; A blocking cover (96) having a number of height adjustment holes (95a) formed while maintaining a vertical interval so as to coincide with the assembly screw holes (94) of the horizontal reinforcing strip (94); It consists of fastening bolts (98) that are inserted through the height adjustment holes (95a) of the blocking cover (96), fastened to the assembly screw holes (95a), and fix the blocking cover (96).

[0029] On the other hand, an inner oil supply hose (101) and an inner oil discharge hose (102) are connected between the hydraulic piston motor (60) and a motor protection valve (100) fastened and fixed to the upper part of the space (21a) of the second side housing (21). The motor protection valve (100) is connected to the hydraulic device (2) of the excavator, and an outer oil supply hose (103) and an outer oil discharge hose (104) are connected so that oil is supplied and blocked. A motor cover (60a) for concealing the hydraulic piston motor (60) is fastened and fixed to be separable inside the extension housing (61) and above the horizontal plate (12).

[0030] At this time, the inner oil supply hose (102) and the inner oil discharge hose (103) are connected to the other of the motor protection valve (100), one of them flows into the upper space (24a) through the inflow hole (21a-1) formed in the upper part of the second side housing (21), and is connected to the hydraulic piston motor (60) through the square hole (12a) formed in the horizontal plate (12) of the main body (10), thus concealing the exposure to the outside and eliminating the interference during the crushing operation.

[0031] The operating state of the tree crusher mounted on the excavator according to the present invention configured as described above will be schematically described.

[0032] As shown in FIG. 12, after positioning the excavator on a flat place and stopping the engine, lower the boom with the parking brake fixed, and connect the link connecting part (11) to the excavator arm (1) to mount the crusher.

[0033] In such a state, move the excavator to a working place such as a steep slope where it is difficult for people to approach, a pasture, a mountain, a rural road, a road shoulder, etc., operate the hydraulic device (2) of the excavator, supply oil to the hydraulic piston motor (60) through the motor protection valve (100), operate the crusher, and perform the crushing operation on thick-trunked trees and non-thick brushwood.

[0034] Regarding this operating state, as shown in FIGS. 8 and 9, the oil of the hydraulic device (2) is supplied to the motor protection valve (100) through the outer oil supply hose (103) connected between the hydraulic device (2) of the excavator and the motor protection valve (100) fastened and fixed to the upper part of the space (21a) of the second side housing (21), and is supplied to the hydraulic piston motor (60) mounted so as to be separable as an assembly member (70) in the extension housing (61) through the inner oil supply hose (101) connected between the motor protection valve (100) and the hydraulic piston motor (60), and the hydraulic piston motor (60) rotates.

[0035] As a result, the rotational force of the hydraulic piston motor (60) is transmitted to an externally connected shaft (75) axially provided on the motor shaft (76), and is transmitted to the horizontal rotor shaft (31) by a connecting pulley (86) connected between an upper pulley (84) axially provided on the externally connected shaft (75) and a lower pulley (82) axially provided on one outer peripheral surface of the horizontal rotor shaft (31) of the rotor (30).

[0036] At the same time, as shown in FIGS. 5 to 7, the horizontal rotor shaft (31) axially provided to rotate as a rotating member (50) between the first and second side housings (20) (21) rotates counterclockwise, and a mounting recess (34) is spirally arranged on the outer peripheral surface of the horizontal rotor shaft (31). A large number of circular plate vertical flanges (33) mounted in the mounting recess (34) are mounted so as to be spirally separable, and the crushing blades (45) of the rotor blade member (40) with excellent crushing force crush and remove trees and weeds by the counter-rotating force.

[0037] In the crusher operating in this way, in order to crush trees and weeds that are not cut, that is, standing vertically, while lowering the boom of the excavator from top to bottom, they are crushed little by little with the crushing blades (45) of the rotor blade member (40).

[0038] Also, in order to crush trees and weeds in a cut state, that is, in a state of lying on the ground, the skid (22) fixed to the lower ends of the first and second side housings (20) (21) of the crusher is placed on the ground or positioned close thereto, and crushed with the crushing blades (45) while turning left and right.

[0039] Due to such an operation, the crushed material generated by the crushing blades (45) inside the crushing space (24b) between the first and second side housings (20) (21) rotates and moves along the horizontal rotor shaft (31) and the circular plate vertical flange (33) of the rotor (30) by centrifugal force, and hits the inner surface of the rear cover member (90) mounted so as to be height-adjustable between the curved blocking plate (23) between the first and second side housings (20) and the rear panel (14) of the main body (10), and is discharged forward.

[0040] The height of the rear cover member (90) will be selected and adjusted according to the objects such as trees and shrubs to be crushed in this way.

[0041] To outline this operating state, as shown in FIGS. 10 and 11, during the crushing operation of a thick-trunk tree, after releasing the fastening force of the fastening bolt (98), the blocking cover (96) is moved upward to widen the crushing space (24b), and during the crushing operation of a thin-trunk shrub, the distance of the crushing space (24b) is narrowed by the blocking cover (96).

[0042] On the other hand, when the crushing operation is completed, the supply of oil to the hydraulic piston motor (60) is blocked, the oil in the hydraulic piston motor (60) is returned to the hydraulic device (2) of the excavator, and the link connection part (11) is separated from the excavator arm (1) to wait for the next operation.

[0043] The preferred embodiments of the present invention described above are disclosed for illustrative purposes, and those skilled in the art with ordinary knowledge of the present invention can make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be regarded as belonging to the following claims.

Explanation of Reference Numerals

[0044] 1: Excavator arm 2: Hydraulic device 10: Main body 11: Link connection part 12: Horizontal plate 13, 14: Front panel, rear panel 20, 21: First, second side housings 22: Skid 23: Curved blocking plate 24a: Upper space 24b: Crushing space 30: Rotor 31: Horizontal rotor shaft 32: Central hole 33: Circular plate vertical flange 34: Mounting recess 40: Rotor blade member 41: Block through-hole 41: Inclined assembly projection 42: Blade mounting block 43: Inclined fitting groove 44: Crushing recess 45: Crushing blade 46: Fastening long bolt 47: Nut 50: Rotating member 60: Hydraulic piston motor 61: Extension housing 70: Assembly member 80: Power transmission member 90: Rear cover member 91: Square recess 92: Vertical reinforcement band 93a: Assembly screw hole 94: Horizontal reinforcement band 95a: Height adjustment hole 96: Shut-off cover 98: Fastening bolt

Claims

1. A main body (10) comprising a horizontal plate (12) with a link connecting part (11) connected to an excavation machine arm (1) mounted on one side of the upper part, and a front plate (13) and a rear plate (14) formed by bending on the front and rear surfaces of the horizontal plate (12); First and second side houses (20) (21) which are finished vertically at both ends of the horizontal plate (12), the front plate (13), and the rear plate (14), with skids (22) fixed to the lower ends, spaces (20a) (21a) formed on the outside, both ends of a curved blocking plate (23) fixed between the inner surfaces of the upper parts, and an upper space (24a) and a crushing space (24b) formed; A rotor (30) for crushing trees and weeds, which is axially installed to rotate as a rotating member (50) in the crushing space (24b) between the first and second side houses (20) (21); An extension house (61) integrally formed on the upper part of the horizontal plate (12) so that a connecting space (61a) is formed to communicate with the space (20a) of the first side house (20), and a hydraulic piston motor (60) which is detachably mounted as an assembly member (70) in the extension house (61) and operates by the hydraulic pressure supplied from the excavation machine, and rotates the rotor (30) as a power transmission member (80); The excavator-mounted tree crusher is characterized in that it is composed of a rear cover member (90) which is mounted on the rear plate (14) of the main body (10) so as to be height-adjustable, blocks the crushing space (24b), and allows crushed materials to be discharged to the front.

2. The rotor (30) includes a horizontal rotor shaft (31) axially installed to rotate as the rotating member (50) between the first and second side houses (20) (21); A number of circular plate vertical flanges (33) with central holes (32) formed in the central region so as to be inserted and fixed at equal intervals on the outer peripheral surface of the horizontal rotor shaft (31); Mounting recesses (34) formed horizontally and obliquely by cutting on both outer peripheral edges so as to communicate with the central holes (32) of the circular plate vertical flanges (33) and arranged spirally on the outer peripheral surface of the horizontal rotor shaft (31); The excavator-mounted tree crusher according to claim 1, characterized in that it is composed of rotor blade members (40) which are detachably mounted on the outer peripheral surface of the horizontal rotor shaft (31) and the mounting recesses (34) of the circular plate vertical flanges (33) for crushing trees and weeds.

3. The rotor blade member (40) has an end fixed to the outer peripheral surface of the horizontal rotor shaft (31), an upper part fixed to the horizontal part of the mounting recess (34), and a number of blade mounting blocks (42) in which an inclined assembly projection (41) having a block through-hole (41a) is formed at the lower part; An inclined fitting groove (43) coupled to the inclined assembly projection (41) of the blade mounting block (42) is formed at the upper part, and a crushing blade (45) having a blade through-hole (44a) so as to face the block through-hole (41a) is formed; The excavator-mounted tree crusher according to claim 2, characterized in that it is composed of a fastening long bolt (46) and a nut (47) which are fastened and fixed through the blade through-hole (44a) and the block through-hole (41a) so as to be able to mount the crushing blade (45) detachably.

4. The rear cover member (90) has a square recess (91) formed in the rear panel (14) so as to communicate with the crushing space (24b); Vertical reinforcing bands (92) fixed so as to face the rear panel (14) on both outer sides of the square recess (91); A horizontal reinforcing band (94) fixed to the rear panel (14) between the vertical reinforcing bands (92) and having a number of assembly screw holes (93a) formed while maintaining a horizontal interval; A blocking cover (96) in which a number of height adjustment holes (95a) are formed while maintaining a vertical interval so as to coincide with the assembly screw holes (94) of the horizontal reinforcing band (94); The excavator-mounted tree crusher according to claim 1, characterized in that it comprises fastening bolts (98) which are inserted through the height adjustment holes (95a) of the blocking cover (96), fastened to the assembly screw holes (93a), and fix the blocking cover (96).

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