Working machine

Abstract

To provide a working machine connected to a travel machine body, capable of performing a tilling operation without the need of transmission of engine power at the travel machine body, capable of being towed by even a small-sized travel machine body of low power by making the whole lightweight and compact, and securing sufficient tilling performance.SOLUTION: A working machine includes: an operation frame; a plurality of tilling disks rotatably operated along with traveling; and regulation pawls inserted into the underground and regulating upward displacement. The plurality of disks are aligned side by side in an attitude of inclining to one of the left and right sides. The operation frame has: right and left vertical frames formed in a front-back direction; front and back traverse frames in a left-right direction installed between the vertical frames; and left and right reinforcement frames in the front-back direction. The reinforcement frames are separately installed between parts each extending further outward from the left and right vertical frames in the traverse frames, and the disks and the regulation pawls are supported on the horizontal frame side.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a working machine that is connected to a traveling body and performs tilling work.

Background Art

[0002] A working machine is known that includes a working frame connected to the traveling body side, and a plurality of disks that are grounded in a field and perform tilling by a rotational operation accompanying the traveling of the traveling body. The disk group is configured by arranging the plurality of disks side by side in a posture inclined to one of the left and right, and a working machine in which the disk group is supported is known on the working frame side (see, for example, Patent Document 1).

[0003] According to the working machine of the above document, as the traveling body travels, the disks of the working machine rotate, and thus tilling work is performed. Therefore, compared with a working machine such as a rotary tiller that performs tilling work by rotationally driving tilling claws with power from an engine, its power transmission structure can be simplified, and sufficient tilling performance can also be ensured by biting the periphery of the disks that rotate during traveling into the soil.

[0004] On the other hand, the working frame towed by the traveling body is required to have high strength, its structure becomes complicated and heavy, and it is difficult to make it compact. Therefore, it is difficult to tow with a small traveling body that has only low-output traveling power. Further, even if the working machine could be made lightweight and compact, there would be another problem that the force for biting the periphery of the disks that rotate during traveling into the soil would decrease and the tilling performance would deteriorate.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention relates to a working machine that is connected to a traveling body and can perform tilling work without transmitting the engine power on the traveling body side. An object of the present invention is to provide a working machine that can be towed even by a small-sized traveling body with low output by making the whole body lightweight and compact, and that can secure sufficient tilling performance.

Means for Solving the Problems

[0007] To solve the above problems, there is provided a working machine that is connected to a traveling body and performs tilling work, including a working frame connected to the traveling body side, a plurality of disks that are grounded on a field and perform tilling by rotational operation accompanying the traveling of the traveling body, and a regulating claw that is supported on the working frame side and regulates upward displacement of the disks during traveling of the traveling body by being inserted into the soil. A disk group is formed by arranging the plurality of disks side by side in a posture inclined to one side in the left-right direction. The working frame has a pair of left and right vertical frames formed in the front-rear direction, a pair of front and rear horizontal frames that are installed and fixed between the left and right vertical frames and are formed in the left-right direction, and a pair of left and right front-rear reinforcing frames. End portions near the left and right sides of each horizontal frame are extended further outward in the left and right directions from the adjacent vertical frame to form extended portions. The reinforcing frames are separately installed and fixed between the extended portions on one side in the left-right direction of the front and rear horizontal frames and between the extended portions on the other side in the left-right direction. On the horizontal frame side, the disk group and the regulating claw are respectively supported.

[0008] The machine may be provided with left and right leveling rotors that are grounded in the field and level the ground by rotating as the traveling body travels, and the rearward portions of each reinforcing frame are extended further rearward than the rear horizontal frame to form an extension section, and the leveling rotors are supported on the working frame in a state that can be switched between an deployed state in which they are deployed behind the disk group and can be moved up and down, and a stored state in which they are stored on the operating frame side, and the reinforcing frame is configured to support the leveling rotor when it is switched to the stored state by its extension section.

[0009] The work machine may further include an actuator for raising and lowering the leveling roller so as to be able to switch between states, the actuator being attached to and supported by a support that supports the disk on the work frame side. Effect of the Invention

[0010] A pair of vertical frames and a pair of horizontal frames are assembled in a well-shaped configuration, and the front and rear horizontal frames The work frame, including the pair of reinforcing frames fixed between the parts extending from the well-shaped part to the left and right outside, can maintain a simple configuration while ensuring sufficient strength, so that the work machine can be made light and compact, and can be towed by a small, low-power traveling body. In addition, as a result of making the work machine lighter, the force that embeds the peripheral side of the disk into the soil decreases due to its own weight, but the regulating claws attached and supported by the high-strength work frame can suppress this decrease, so it is possible to ensure sufficient tilling performance.

[0011] It is provided with a leveling rotor in the left - right direction that is grounded to the field and levels the ground by rotational operation accompanying the running of the running body. The rear - side part of each reinforcing frame extends further rearward than the rear - side horizontal frame to form an extended part. The leveling rotor is supported on the working frame side in a state where it can be switched between a deployed state in which it is deployed behind the disk group and can move up and down, and a stored state in which it is stored on the actuator frame side. According to the structure in which the reinforcing frame is configured to support the leveling rotor in the stored state by its extended part, the leveling rotor in the stored state can be stably supported while maintaining a simple structure of the working frame.

[0012] It is provided with an actuator for raising and lowering the leveling rotor in a state - switchable manner. According to the structure in which the actuator is attached and supported on the support tool side that supports the disk on the working frame side, it becomes possible to support the actuator without complicating the structure.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying out the Invention

[0014] FIG. 1 is a side view of an agricultural tractor to which the present invention is applied. The tractor includes a running body 1 and a working machine 3 connected to the rear part of the running body 1 via a lift link 2.

[0015] The traveling body 1 has a pair of left and right front wheels 4, 4, a pair of left and right rear wheels 6, 6, a chassis 7 supported by these wheels 4, 4, 6, 6, a bonnet 8 covering an engine (not shown) mounted on the front half of the chassis 7, and a cabin 9 installed on the rear half of the chassis 7. Inside the cabin 9, a control section where an operator gets in is provided.

[0016] The working machine 3 is a disk harrow that does not need to input the engine power from the traveling body 1 side. In this example, the working machine 3 may be connected to the traveling body 1 in a state where the center in the left - right direction thereof coincides with or substantially coincides with the center in the left - right direction of the traveling body 1. Incidentally, this working machine 3 may be connected to the traveling body 1 in a state where it is offset to either the left or right with respect to the traveling body 1.

[0017] FIG. 2 is a perspective view of the disk harrow, FIG. 3 is a side view of the disk harrow in a state where the soil - tilling rotor is switched to the deployed state, FIG. 4 is a side view of the disk harrow in a state where the soil - tilling rotor is switched to the stored state, FIG. 5 is a perspective view showing the structure of the main frame of the disk harrow, and FIG. 6 is a perspective view showing the main - part configuration of the disk harrow.

[0018] As shown in FIGS. 1 to 6, the disk harrow 3 is connected to and supported on the traveling body 1 side by a three - point lifting link 2 behind the traveling body 1. This disk harrow 3 is towed by the traveling body 1 in a state of being in contact with the farm field and performs tilling work as the traveling body 1 moves forward. It includes a main frame (working frame) 11 connected to the traveling body 1 side, a pair of front and rear disk units (disk groups) 12A, 12B supported on the main frame 11 side, a pair of left and right chisels (restricting claws) 13, 13 arranged further forward of the front - side disk unit 12A which is the front - side disk unit and supported and fixed on the main frame 11 side, and a left - right - direction soil - tilling rotor 14 arranged further rearward of the rear - side disk unit 12B which is the rear - side disk unit and supported on the main frame 11 side.

[0019] The main frame 11 includes a pair of left and right vertical frames 16, 16 formed in a square pipe shape in the front-rear direction, a pair of front and rear horizontal frames 17, 17 formed in a square pipe shape in the left-right direction, a single connecting frame 18 formed in a square pipe shape in the left-right direction, and a pair of left and right reinforcing frames 19, 19 formed in a square pipe shape in the front-rear direction.

[0020] Each of the front and rear horizontal frames 17, 17 is fixed to the vertical frames 16, 16 by welding or the like in a state of being bridged from one upper surface of the left and right vertical frames 16, 16 to the other upper surface. More specifically, the front horizontal frame 17 is installed and fixed between the front end portions of the left and right vertical frames 16, 16. The rear horizontal frame 17 is installed and fixed between the middle portions in the entire length direction (front-rear direction) of the left and right vertical frames 16, 16.

[0021] In each of the horizontal frames 17, the portions near the ends in the left-right direction, which is the entire length direction, extend outward to the left and right from the space between the left and right vertical frames 16, 16 in a plan view to form extension portions 17a, 17b.

[0022] The connecting frame 18 is installed and fixed between the portions protruding rearward from the rear horizontal frame 17 at the middle portions of the left and right vertical frames 16, 16. Regarding the fixing means, the left and right ends of the connecting frame 18 are fixed to the left and right inner side surfaces of the adjacent vertical frames 16, 16 by welding or the like.

[0023] One of the left and right reinforcing frames 19 is installed and fixed between the extension portions 17a, 17a on one side of the front and rear horizontal frames 17, 17, and the other left and right reinforcing frame 19 is installed and fixed between the extension portions 17b, 17b on the other side of the front and rear horizontal frames 17, 17. Each of the reinforcing frames 19, 19 is placed on the upper surface of the horizontal frames 17, 17 and fixed by welding or the like.

[0024] The rearward portions of each of the reinforcing frames 19 extend further rearward than the rear horizontal frame 17 to form extension portions 19a, 19a.

[0025] In this way, the main part is configured, and the main frame 11 is provided with a mounting mechanism. The main frame 11 is attached and supported via this mounting mechanism to the above-described lifting link 2 which is a three-point link composed of a single top link 22 and a pair of left and right lower links 23, 23.

[0026] This mounting mechanism has a top mast 24 that protrudes upward from the middle part in all directions of the front side horizontal frame 17, and a pair of link brackets 26, 26 that are arranged at positions corresponding to the left and right with the top mast 24 in the front side horizontal frame 17 interposed therebetween in plan view and that protrude forward from the horizontal frame 17.

[0027] The top mast 24 mainly has a pair of plate-shaped side plates 24a, 24a having a bilaterally symmetric shape. Each side plate 24a has a shape in which its upper and lower parts stand vertically with a thickness direction in the left and right directions, and each part is bent so that the left and right positions of its upper part are located inside its lower part and its middle part inclines upward toward the left and right inside. The rear end side of the top link 22 is attached and supported between the upper end parts of the side plates 24a, 24a so as to be vertically rotatable.

[0028] Each of the left and right link brackets 26, 26 is arranged at the lower end side of the nearer side side plates 24a, 24a in the front side horizontal frame 17 and is formed in a channel shape with an open rear in plan view. The rear end sides of the left and right lower links 23, 23 are attached and supported between the U-shaped recesses in plan view of the corresponding link brackets 26, 26 so as to be vertically rotatable.

[0029] Also, the upper end part of the top mast 24 and the rear side horizontal frame 17 are connected by a pair of slender plate-shaped support frames 27, 27 that are bilaterally symmetric. Each support frame 27 connects the upper end part of the top mast 24 and the part where it intersects with the nearer side vertical frame 16 in the rear side horizontal frame 17 or the part nearer to the intersection part.

[0030] According to such a structure, the working machine 3 can be lowered with respect to the traveling body 1 to a working position where it is grounded on the field, and can also be raised to a non-working height where it is not grounded from the field. In the following description, unless otherwise specified, it is assumed that the working machine 3 is lowered to the working height.

[0031] The above disk units 12A and 12B are separately supported by the corresponding front and rear horizontal frames 17 and 17. Each of the left and right disk units 12A and 12B has a plurality of disks 28A and 28B arranged in parallel in the left-right direction, which is the entire length direction of the horizontal frames 17 and 17. The front disk unit 12A is offset to one side (in the example shown in the figure, the right side in the traveling direction, hereinafter simply referred to as "right") with respect to the center of the working machine 3 in the left-right direction, and the rear disk unit 12B is offset to the other side (in the example shown in the figure, the left side in the traveling direction, hereinafter simply referred to as "left") with respect to the center of the working machine 3 in the left-right direction. The working machine 3 is provided with supports 29 provided for each of the plurality of disks 28A and 28B and individually supporting the disks 28A and 28B.

[0032] In the example shown in the figure, the disks 28A and 28B are flower-shaped disks made of a disk-shaped sheet metal curved in a spherical shape. The central portions of these disks 28A and 28B are rotatably attached and supported to the lower ends of the supports 29 via bearings 30. Incidentally, the plurality of disks 28A of one disk unit 12A are all directed with the concave side facing one side (in the example shown in the figure, the left side, which is the direction opposite to the above-mentioned offset side), and the plurality of disks 28B of the other disk unit 12B are all directed with the concave side facing the other side (in the example shown in the figure, the right side, which is the direction opposite to the above-mentioned offset side).

[0033] Each support member 29 includes a cylindrical fixing member 31 that is externally mounted and fixed to a horizontal frame 17 formed in an angular pipe shape, a pair of left and right plate-shaped support brackets 32, 32 that extend integrally from the outer peripheral surface side of the fixing member 31 and whose thickness direction is oriented left and right, and a support arm 33 that is supported between the left and right support brackets 32, 32 so as to be swingable up and down and that protrudes obliquely downward and rearward from the support brackets 32, 32 side.

[0034] The fixing member 31 has a pair of half pieces 34, 34 formed in an angular shape in the left-right direction along the horizontal frame 17. Each end portion in the width direction of each half piece 34 extends toward the side where they are separated from each other to constitute fastening portions 34a, 34a. With the horizontal frame 17 positioned between the pair of half pieces 34, 34, the concave portions thereof facing each other, and the fastening portions 34a, 34a, 34a, 34a bolted and fastened to each other, the fixing member 31 is attached and fixed to the horizontal frame 17.

[0035] The front side of the support bracket 32 is fixed to the rear surface and the lower surface side of the peripheral surface of the fixing member 31 by welding or the like, and extends in two directions, obliquely downward and rearward and obliquely upward and rearward. Between the portions of the left and right support brackets 32, 32 that extend obliquely downward and rearward, the upper end portion of the support arm 33 is attached and supported by a mounting bolt 36. The mounting bolt 36 also functions as a support shaft that is a swing fulcrum of the support arm 33.

[0036] The support arm 33 is a plate-shaped member whose thickness direction is oriented left and right. A long hole 33a is formed in the support arm 33, and a regulating pin 37 that is installed and fixed between the left and right support brackets 32, 32 is inserted through the long hole 33a (see FIG. 6). The support arm 33 swings up and down within the range in which the regulating pin 37 displaces in the long hole 33a.

[0037] A compression spring (biasing member) 38 is provided between the portions of the left and right support brackets 32, 32 that extend obliquely upward and rearward and the support arm 33. This compression spring 38 elastically biases the support arm 33 toward the downward swing side.

[0038] At the lower end of this support arm 33, disks 28A and 28B are rotatably supported via a bearing 30 in a posture inclined to one side, left or right. Regarding the support postures of disks 28A and 28B in more detail, each of disks 28A and 28B is inclined to the side opposite to the side where it is recessed spherically on the left and right (the offset side of disk units 12A and 12B) with respect to the posture of standing upright vertically when viewed from the front or the back. Specifically, a plurality of disks 28A of the front disk unit 12A are all inclined to the right side, which is the offset side thereof, and a plurality of disks 28B of the rear disk unit 12B are all inclined to the left side, which is the offset side thereof.

[0039] According to such a configuration, by the elastic biasing force from the compression spring 38, each of disks 28A and 28B is pressed downward, and its peripheral side stably bites into the soil. As the traveling body 1 moves forward, it rotates and operates, efficiently excavates the soil in the field for tillage, and moves (casts) the tilled soil to the side opposite to the side where it is inclined (the direction of raking).

[0040] In other words, during the tillage operation when moving forward, the excavated soil is moved to one side, left or right (specifically, the left side) by a plurality of disks 28A of the front disk unit 12A and is moved to the other side, left or right (specifically, the right side) by a plurality of disks 28A of the rear disk unit 12B.

[0041] At the end sides in the raking direction of the front and rear disk units 12A and 12B respectively, plate-shaped regulating members 39A and 39B for regulating the movement of the soil that has been raked up to that point further in the raking direction are attached and supported on the side of the nearby horizontal frames 17 and 17. In other words, regulating members 39A and 39B are provided on the left end side, which is the end in the raking direction of the front disk unit 12A, and on the right end side, which is the end in the raking direction of the rear disk unit 12A respectively.

[0042] The above-mentioned chisels 13, 13 are respectively supported and fixed by a fixture 41 to a portion closer to one side of the left and right of the front horizontal frame 17 and an intermediate portion.

[0043] The fixture 41 has a cylindrical fixing member 42 that is externally mounted and fixed to the horizontal frame 17, a fixing bracket 43 that extends integrally downward from the fixing member 42 and is formed in a plate shape with its thickness direction facing left and right, and a support frame 44 that is attached and fixed to the fixing bracket 43 and extends obliquely downward and forward in a plate shape with its thickness direction facing left and right.

[0044] The chisel 13 is formed in a plate shape with its thickness direction facing left and right and having the same length as the support frame 44, and has a support portion 13a whose upper part is detachably fixed to the lower part of the support frame 44, and a claw portion 13b which is a plate-shaped main body portion formed integrally with the lower end portion of the support portion 13a and formed in the front-rear direction along the horizontal direction.

[0045] During the forward travel of the traveling body 1, the lower part of the chisel 13 is inserted into the soil, and the upward movement of the working machine 3 including the disks 28A, 28B is restricted by the action of the claw portion 13b located in the soil. For this reason, during the tilling operation by towing the lightweight and small-sized working machine 3 and causing the traveling body 1 to travel forward, the situation where the working machine 3 floats due to insufficient weight and the efficiency of the tilling operation decreases can be efficiently prevented by the chisel 13 inserted into the soil.

[0046] The above-mentioned leveling rotor 14 is supported on the main frame 11 side by a support device 46. The entire leveling rotor 14 forms a cage-shaped cylindrical shape, and is supported by the support device 46 so as to be rotatable about its axis as a fulcrum in a posture where its axis is oriented in the left-right direction. The center of the leveling rotor 14 in the left-right direction is located at the center of the working machine 3 (traveling body 1) in the left-right direction.

[0047] The soil preparation rotor 14 has a plurality (five in the illustrated example) of disks 47 formed in a circular flower-shaped plate shape that are arranged in parallel at predetermined intervals in the left-right direction, which is the axial direction of its cylindrical shape, and whose thickness direction is oriented in the left-right direction, and a plurality of left-right edge frames 48 that are evenly arranged at predetermined intervals in the circumferential direction of its cylindrical shape.

[0048] The edge frame 48 projects radially outward from the disk 47 in a side view, and the end portion on the projecting side is formed in a wave shape to form a plurality (specifically, a large number) of teeth 48a. Each edge frame 48 extends throughout the axial direction of the cylindrical shape of the soil preparation rotor 14 and connects and fixes the plurality of disks 47 to each other. At least the main part of the soil preparation rotor 14, which is cylindrical and cage-shaped, is formed by the plurality of edge frames 48 and the plurality of disks 47.

[0049] The support device 46 is provided in a range spanning the middle part of the rear horizontal frame 17, the middle part of the connecting frame 18, and the rear end parts of the left and right vertical frames 16, 16. This support device 46 has a link mechanism 49 that supports the soil preparation rotor 14 on the main frame 11 side so as to be movable up and down, and an actuator 51 that is arranged on the main frame 11 side and drives the soil preparation rotor 14 to move up and down by telescopic operation.

[0050] The link mechanism 49 has a pair of support cylinders 52, 52 that are fixed to the upper surfaces of the rear end parts of the left and right vertical frames 16, 16 respectively and are formed in a left-right cylindrical shape with the same axis, a single shaft 53 that is collectively inserted on the inner peripheral surface side of both the left and right support cylinders 52, 52, a pair of left-right support arms 54, 54 that are supported on the main frame 11 side so as to be swingable back and forth with the shaft 53 as a fulcrum, and an interlocking mechanism that operates in conjunction with the back-and-forth swing of the support arms 54, 54.

[0051] Each of the left and right support arms 54, 54 is formed in a plate shape having thickness on the left and right and extending linearly from the base end toward the tip end. The left and right support arms 54, 54 are attached and fixed to the left and right end portions of the shaft 53 at one end (base end) portion in the entire length direction so that they are in the same swing position as each other in side view. That is, the left and right support arms 54, 54 swing back and forth integrally with the shaft 53 while maintaining the same posture as each other in side view.

[0052] Between the tip end portions, which are the end portions on the side opposite to the base end portions of the left and right support arms 54, 54, a leveling rotor 14 is rotatably installed and supported via bearings 57, 57 with its axis as a fulcrum.

[0053] The interlocking mechanism includes an operation arm 58 that protrudes upward from the middle portion of the connecting frame 18 and swings back and forth, an operating arm 59 that protrudes rearward from the shaft 53 and swings up and down integrally with the shaft 53, and a link 61 that connects the operation arm 58 and the operating arm 59 to interlock them. Each of the operation arm 58, the operating arm 59, and the link 61 is configured by connecting a pair of left and right metal plate members to each other and fixing them with a spacer or the like.

[0054] The lower end portion of the operation arm 58 is attached and supported on the upper surface side of the connecting frame 18, and swings back and forth with the lower end portion as a fulcrum. The link 61 is formed in an arc shape that bulges obliquely upward rearward in side view so as to avoid the shaft 53.

[0055] The interlocking mechanism is configured such that when the operation arm 58 is swung rearward to swing the operating arm 59 downward, the support arms 54, 54 are swung rearward to displace the leveling rotor 14 rearward, while when the operation arm 58 is swung forward to swing the operating arm 59 upward, the support arms 54, 54 are swung forward to displace the leveling rotor 14 forward.

[0056] The support device 46 configured as described above can switch the leveling rotor 14 between a deployed state where it is deployed rearward of the rear disk unit 12B and vertically adjustable, and a stored state where it is stored forward on the main frame 11 side (see FIG. 4), by the back-and-forth swinging of the support arms 54, 54.

[0057] Furthermore, in the above-described deployed state, there are two types: a working state where the leveling rotor 14 is lowered to a height where it touches the field surface side (see FIG. 1), and a non-working state where it is raised to a height where it does not touch the field surface (see FIG. 3). The switching of the leveling rotor 14 between one of the working state and the non-working state and the other, and vice versa, is also performed by the back-and-forth swinging of the support arms 54, 54 (that is, the back-and-forth swinging by the operation arm 58).

[0058] Incidentally, the leveling rotor 14 switched to the stored state is supported from below by contacting the extending portions 19a, 19a of the left and right reinforcing frames 19, 19 with itself or the support arms 54, 54.

[0059] The actuator 51 is an electro-hydraulic cylinder in which a hydraulic tank, a hydraulic pump driven by an electric motor, and a hydraulic cylinder are integrally unitized. One end side (base end side) of the telescoping portion (specifically, the cylinder tube 51a and the piston rod 51b) in the actuator 51 is pivotally supported on the main frame 11 side so as to be vertically rotatable, and the other end side (tip end portion) is pivotally connected to the upper end side of the operation arm 58 so as to be vertically rotatable.

[0060] Specifically, the actuator 51 is attached and supported by a support 29 disposed at a portion near the center of the rear horizontal frame 17. More specifically, a pair of left and right interlocking side brackets 62, 62 extend integrally forward and upward from the upper surface and the front surface of the fixing member 31 in the support 29. The left and right interlocking side brackets 62, 62 are L-shaped in side view, and the base end portion of the actuator 51 is pivotally supported between the front end side and the upper end side portions thereof so as to be vertically swingable.

[0061] By extending the actuator 51, the operating arm 58 is swung backward, while by contracting the actuator 51, the operating arm 58 is swung forward. Since the extension operation of the actuator 51 can also be performed by utilizing the self-weight of the tilling rotor 14, a single-acting type that hydraulically operates only on the contraction side may be used. However, in this example, a double-acting type that hydraulically operates on both the extension side and the contraction side is used.

[0062] Incidentally, normally, if the supply and discharge of pressure oil to the actuator 51 are stopped, the operating arm 58 can be fixed at a predetermined forward and backward swing position. However, when the tilling rotor 14 is heavy, the supply and discharge of pressure oil to the actuator 51 are forcibly generated, and a situation where the operating arm 58 swings downward unintentionally is assumed. To prevent such a situation, in this example, as described above, a structure is adopted in which the tilling rotor 14 is supported from below by the reinforcing frames 19, 19.

[0063] When the traveling body 1 is advanced while the tilling rotor 14 is switched to the working state, the tilling rotor 14 rotates and crushes the soil lumps excavated and cultivated by the front and rear disk units 12A, 12B with a large number of teeth 48a arranged in the left-right direction, and levels the field surface for tilling.

[0064] In addition, the support device 46 is provided with a telescopic member 63 as a display means for displaying the position of the tilling rotor 14 (in other words, the forward and backward swing position of the operating arm 58) (see FIG. 6). Further, a wired or wireless remote control (not shown) for operating the expansion and contraction of the actuator 51 may be provided to control the state of the tilling rotor 14 from a position away from the control unit and other working machines 3.

[0065] The telescopic member 63 has a sleeve 63a and a rod 63b that is coaxially aligned with the sleeve 63a and is accommodated and supported in the space on the inner peripheral surface side of the sleeve 63a so as to be reciprocally movable in the axial direction. When the rod 63b moves and is accommodated within the sleeve 63a in its axial direction, the overall length of the telescopic member 63 is reduced. On the other hand, when the rod 63b moves out of the sleeve 63a and protrudes in its axial direction, the overall length of the telescopic member 63 is extended.

[0066] And, like the actuator 51, one end of this telescopic member 63 is pivotally supported between the front-end side and the upper-end side portions of a pair of left and right interlocking brackets 62, 62 so as to be pivotable up and down, and the other end is pivotally connected to the upper-end side of the operation arm 58 so as to be pivotable up and down. For this reason, in conjunction with the expansion and contraction of the actuator 51, the telescopic member 63 also expands and contracts. If the protruding amount of the rod 63b from the sleeve 63a is known, the expansion and contraction state of the telescopic member 63 can be objectively grasped, and this protruding amount can be confirmed by visually observing a scale (not shown) printed or engraved on the outer peripheral surface of the rod 63b.

Explanation of Signs

[0067] 1 Traveling body 3 Working machine 13 Chisel (regulating claw) 11 Main frame (working frame) 12A Front disk unit (disk unit, disk group) 12B Rear disk unit (disk unit, disk group) 14 Land leveling rotor 16 Vertical frame 17 Horizontal frame 17a Extension part 19 Reinforcing frame 19a Extension part 28A Disk 28B Disk 29 Support 51 Actuator

Claims

1. A working machine that is connected to a traveling body and performs tillage work, a work frame connected to the traveling body side, a plurality of disks that are grounded in the field and perform tillage by rotational operation accompanying the traveling of the traveling body, a regulating claw that is supported on the work frame side and regulates upward displacement of the disks during traveling of the traveling body by being inserted into the soil, and a disk group is formed by arranging a plurality of the disks side by side in a left - right direction in an inclined posture to one side, the work frame has a pair of left - right vertical frames formed in the front - rear direction, a pair of front - rear horizontal frames that are installed and fixed between the left - right vertical frames and are formed in the left - right direction, and a pair of left - right front - rear reinforcing frames, each end - side portion of each horizontal frame on the left and right is extended further to the left and right outside from the adjacent vertical frame to form an extension portion, the reinforcing frames are separately installed and fixed between the extension portions on one side in the left - right direction of the front - rear horizontal frames and between the extension portions on the other side in the left - right direction, on the horizontal frame side, each of the disk group and the regulating claw is supported A working machine characterized by the above.

2. Comprising a left - right leveling rotor that is grounded in the field and performs leveling by rotational operation accompanying the traveling of the traveling body, the rear - side portion of each reinforcing frame is extended further rearward than the rear - side horizontal frame to form an extension portion, the leveling rotor is supported on the work frame side in a state where it can be switched between a deployed state in which it can be moved up and down in a state deployed behind the disk group and a stored state stored on the work frame side, the reinforcing frame is configured to support the leveling rotor in the stored state by its extension portion The working machine according to claim 1.

3. Comprising an actuator for raising and lowering the leveling rotor in a state - switchable manner, the actuator is attached and supported on the support side that supports the disk on the work frame side The working machine according to claim 2.

Images