Disc harrow type tilling machine

Abstract

To improve adaptability to different fields. [Solution] A disc harrow type tilling implement 3 is connected to the rear of a tractor 1 via a lifting link mechanism 2 and tills the soil in accordance with the movement of the tractor 1. The implement comprises an implement frame 4 connected to the rear of the tractor 1, a front row of discs 5 arranged at predetermined intervals in the left-right direction below the front of the implement frame 4, a rear row of discs 6 arranged at predetermined intervals in the left-right direction below the rear of the implement frame 4, a roller 7 positioned behind the rear row of discs 6 so as to be vertically adjustable, and a weight 9 placed on the implement frame 4. Each of the multiple soil-crushing discs 16 constituting the front row of discs 5 and the rear row of discs 6 is rotatable about a disc support shaft 21 as its center of rotation, and the weight 9 is located above the disc support shaft 21 in a side view.

Description

Technical Field

[0001] The present invention relates to a disk harrow type tillage working machine that is connected and used to the rear part of a traveling body.

Background Art

[0002] There is known a disk harrow type tillage working machine that is connected to the rear part of a traveling body via a lift link mechanism and tills the soil according to the traveling of the traveling body (see, for example, Patent Document 1). This type of disk harrow type tillage working machine pierces the soil with the disk while rotating itself as the traveling body travels, so that it can not only reduce the fuel consumption of the traveling body compared to a rotary type tillage working machine that rotates tillage claws with the PTO power of the traveling body, but also has the advantage of speeding up the work.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when a disk harrow type tillage working machine is used in a hard field, there is a possibility that the disk may not penetrate enough into the soil, and there is room for improvement.

Means for Solving the Problems

[0005] The present invention was created in view of the above circumstances and with the aim of solving these problems, and the invention of claim 1 is a disc harrow type tilling work machine connected to the rear of a traveling machine via a lifting link mechanism and tilling soil in accordance with the movement of the traveling machine, comprising: a work machine frame connected to the rear of the traveling machine via the lifting link mechanism; a front row of discs arranged at predetermined intervals in the left-right direction below the front side of the work machine frame and crushing soil in accordance with the movement of the traveling machine; a rear row of discs arranged at predetermined intervals in the left-right direction below the rear side of the work machine frame and crushing soil in accordance with the movement of the traveling machine; a roller positioned behind the rear row of discs so as to be vertically adjustable; and a weight positioned on the work machine frame, wherein the plurality of discs constituting the front row of discs and the rear row of discs are each rotatable about a disc support shaft as the center of rotation, and the weight is positioned above the disc support shaft in a side view. Furthermore, the invention of claim 2 is a disc harrow type tilling machine as described in claim 1, further comprising: a disc arm supported on the machine frame so as to be vertically rotatable and rotatably supporting the disc via the disc support shaft; and a spring that biases the disc arm downward, wherein the weight is located on a virtual line passing through the disc support shaft and the spring in a side view. Furthermore, the invention of claim 3 is a disc harrow type tilling machine as described in claim 1, further comprising a front weight mounting portion and a rear weight mounting portion arranged on the front and rear sides of the machine frame, to which the weight can be attached and detached. Furthermore, the invention of claim 4 is a disc harrow type tilling machine as described in claim 3, wherein the front weight mounting portion includes a left front weight mounting portion located on the left side of the machine frame and a right front weight mounting portion located on the right side of the machine frame, and the rear weight mounting portion includes a left rear weight mounting portion located on the left side of the machine frame and a right rear weight mounting portion located on the right side of the machine frame. [Effects of the Invention]

[0006] According to the invention of claim 1, in a side view, a weight is provided above the disc support shaft, so that the weight can absorb the upward load that the disc receives from the soil, thereby promoting the disc's penetration into the soil. Furthermore, according to the invention of claim 2, in a side view, the weight is located on a virtual line passing through the disc support shaft and the spring that biases the disc arm downward. Therefore, when the spring contracts due to the upward load the disc receives from the soil, the weight can support the spring and promote the disc's penetration into the soil. Furthermore, according to the invention of claim 3, the implement frame is further provided with a front weight mounting section and a rear weight mounting section, which are arranged on the front and rear sides and to which weights can be attached and detached. By selectively attaching weights to the front weight mounting section and the rear weight mounting section, it is possible to adapt to various fields and adjust the front-to-rear balance. Furthermore, according to the invention of claim 4, since the weight mounting parts are arranged not only front and rear but also left and right, it is possible to adjust not only the front-to-back balance but also the left-to-right balance. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of a disc harrow-type tilling machine attached to a tractor. [Figure 2] This is a side view of a disc harrow-type tilling machine attached to a tractor. [Figure 3] This is a plan view of a disc harrow-type tilling machine attached to a tractor. [Figure 4] This is a perspective view of a disc harrow type tilling machine. [Figure 5] This is a side view of a disc harrow type tilling machine. [Figure 6] This is a plan view of a disc harrow type tilling machine. [Figure 7] This is a front view of a disc harrow type tilling machine. [Figure 8] This is a rear view of a disc harrow type tilling machine. [Figure 9] This is a side view of a disc harrow type tilling machine with the rollers raised. [Figure 10] This is a rear view of a disc harrow type tilling machine with the rollers raised. [Figure 11] This is a side view of a disc harrow-type tilling machine with the chisel stored away. [Modes for carrying out the invention]

[0008] [Disc harrow type tilling machine] Embodiments of the present invention will be described with reference to the drawings. In Figures 1 to 3, 1 is a small or medium-sized tractor (vehicle) with a relatively low engine output horsepower, and a disc harrow type tilling implement 3 (hereinafter sometimes referred to as tilling implement 3) is connected to the rear of the tractor 1 via a lifting link mechanism 2 (top link 2a, left and right lower links 2b, 2b). The tilling implement 3 does not require the PTO power of the tractor 1 and tills the soil in accordance with the forward movement of the tractor 1.

[0009] The tilling implement 3 will be described below with reference to Figures 1 to 11.

[0010] The tilling implement 3 comprises an implement frame 4 connected to the rear of the tractor 1 via a lifting link mechanism 2; a front row of discs 5 arranged at predetermined intervals in the left-right direction below the front of the implement frame 4, which crushes soil in accordance with the movement of the tractor 1; a rear row of discs 6 arranged at predetermined intervals in the left-right direction below the rear of the implement frame 4, which crushes soil in accordance with the movement of the tractor 1; a roller 7 positioned behind the rear row of discs 6 so as to be vertically adjustable; a chisel 8 positioned in front of the front row of discs 5; and a weight mounting section 10 to which a weight 9 can be attached and detached.

[0011] [Working equipment frame] The tillage working machine 3 includes a working machine frame 4 that is lightened using lightweight square steel pipes (square pipes). Specifically described, the working machine frame 4 is configured by connecting a pair of left and right main frames 4a, a front disk support frame 4b, a reinforcing horizontal frame 4c, a rear disk support frame 4d, a roller support frame 4e, and a pair of left and right reinforcing vertical frames 4f.

[0012] The pair of left and right main frames 4a are arranged along the front-rear direction and are connected to the rear part of the tractor 1 via a lift link mechanism 2. The front disk support frame 4b is arranged along the left-right direction and supports the front disk row 5. The reinforcing horizontal frame 4c is arranged along the left-right direction behind the front disk support frame 4b. The rear disk support frame 4d is arranged along the left-right direction behind the reinforcing horizontal frame 4c and supports the rear disk row 6. The roller support frame 4e (reinforcing horizontal frame) is arranged along the left-right direction behind the rear disk support frame 4d and supports the roller 7. The pair of left and right reinforcing vertical frames 4f are arranged facing the front-rear direction outside the main frame 4a.

[0013] Also, the front disk support frame 4b, the reinforcing horizontal frame 4c, the rear disk support frame 4d, and the roller support frame 4e are connected to the upper surface side of the pair of left and right main frames 4a, and the pair of left and right reinforcing vertical frames 4f are connected to the upper surface side of the front disk support frame 4b, the reinforcing horizontal frame 4c, the rear disk support frame 4d, and the roller support frame 4e.

[0014] <0000​​​ [Disk] Both the front disk row 5 and the rear disk row 6 have a plurality of soil-crushing disks 16, and these soil-crushing disks 16 are arranged at a predetermined interval in the left-right direction. The soil-crushing disk 16 is a disk-shaped disc with a concave curved surface, and a sharp cutting edge is formed on its outer peripheral edge, and crop residues and the like are cut by this cutting edge. Further, the outer peripheral edge of the soil-crushing disk 16 has a large number of arc-shaped cutouts, and is also called a flower-shaped disk. The soil-crushing disk 16 tills the soil while piercing the soil and rotating itself due to this flower-shaped disk shape.

[0016] When tilling the soil with such a flower-shaped soil-crushing disk 16, the soil lumps scraped by the soil-crushing disk 16 accumulate in the concave curved surface near the lower part of the soil-crushing disk 16. Further, the accumulated soil lumps are lifted upward as the soil-crushing disk 16 rotates, and then are thrown sideways from the open side of the curved surface.

[0017] Therefore, when arranging a large number of soil-crushing disks 16 at a predetermined interval in the left-right direction, if the concave curved surfaces are directed in the same direction, the soil lumps tilled by the large number of soil-crushing disks 16 are thrown and move to one side in the left-right direction orthogonal to the forward traveling direction of the tractor 1. Therefore, the number of soil-crushing disks 16 constituting the front disk row 5 and the rear disk row 6 is made the same, and the directions of the curved surfaces of the soil-crushing disks 16 constituting each row are provided to be different from each other, for example, the front row is leftward and the rear row is rightward.

[0018] According to such a disk arrangement, the soil lumps moved by the front disk row 5 to one side in the left-right direction can be returned by the rear disk row 6 to the other side in the left-right direction, and the tilling marks can be made flat in the left-right direction. Also, in this case, if the front disk row 5 and the rear disk row 6 are provided with a predetermined distance offset in the left-right direction, the uncultivated land that the front disk row 5 could not till can be tilled by the rear disk row 6, and the unevenness of the tilling surface can be reduced.

[0019] The individual soil-crushing disc 16 is attached to the front disc support frame 4b and the rear disc support frame 4d via a disc support mechanism 17. The disc support mechanism 17 includes a disc bracket 18, a disc arm 19, and a spring 20.

[0020] The disc bracket 18 is attached to the front disc support frame 4b and the rear disc support frame 4d at predetermined intervals in the left-right direction. The disc arm 19 extends downward and rearward from the disc bracket 18, and its tip rotatably supports the soil-crushing disc 16 via the disc support shaft 21.

[0021] The disc bracket 18 supports the base end of the disc arm 19 via the disc arm support shaft 22 so that it can rotate up and down. The disc bracket 18 also includes a rotation restricting bolt 23 that is parallel to the rear of the disc arm support shaft 22. The rotation restricting bolt 23 passes through an arc-shaped (arc shape centered on the disc arm support shaft 22) elongated hole (not shown) formed in the disc arm 19, allowing the disc arm 19 to rotate up and down within the range of the elongated hole.

[0022] The spring 20 is interposed between the spring receiving portion 18a of the disc bracket 18 and the spring receiving portion 19a of the disc arm 19, biasing the disc arm 19 downward. The spring 20 is, for example, a compression coil spring with adjustable biasing force, and the biasing force is adjusted so that under normal tilling conditions the disc arm 19 is positioned at the lower limit of its swing range, and if the soil-crushing disc 16 comes into contact with an obstacle, the disc arm 19 is allowed to rotate upward to avoid it. This prevents the soil-crushing disc 16 from being damaged by contact with an obstacle.

[0023] [Laura] Roller 7 is located behind the rear disc row 6 and has a first function of finely crushing and cutting soil, soil clumps, or crop residues tilled by the front disc row 5 and rear disc row 6, and a second function of adjusting the tilling depth of the front disc row 5 and rear disc row 6. The first function is achieved by making roller 7 a cage-type roller.

[0024] The second function is achieved by supporting the roller 7 so that its vertical position can be adjusted via a roller support mechanism 24. The roller support mechanism 24 comprises a plurality of roller brackets 25, a roller arm support shaft 26, a pair of left and right roller arms 27, a cylinder connecting arm 28, a cylinder bracket 29, a first link 30, a second link 31, a hydraulic cylinder 32, and a vertical position adjustment handle 33.

[0025] Multiple roller brackets 25 are attached to the rear ends of the roller support frame 4e or the left and right reinforcing longitudinal frames 4f. The roller arm support shaft 26 is arranged in parallel above the roller support frame 4e and is rotatably supported by the multiple roller brackets 25. A pair of left and right roller arms 27 are integrally rotatably connected to both ends of the roller arm support shaft 26, and their ends rotatably support the rollers 7 via the roller support shaft 34.

[0026] The cylinder connecting arm 28 is integrally and rotatably connected to the center of the roller arm support shaft 26. The cylinder bracket 29 is fixed in a bridge-like manner along the front-rear direction between the center of the reinforcing transverse frame 4c and the center of the rear disc support frame 4d. The first link 30 and the second link 31 are rotatably connected to each other at one end via a connecting shaft 35. The other end of the first link 30 is rotatably connected to the tip of the cylinder connecting arm 28, and the other end of the second link 31 is rotatably connected to the rear end of the cylinder bracket 29.

[0027] One end of the hydraulic cylinder 32 is rotatably connected to the front end of the cylinder bracket 29, and the other end is rotatably connected to the connecting shaft 35. When the hydraulic cylinder 32 is extended or retracted, the roller arm support shaft 26 rotates via the first link 30 and the cylinder connecting arm 28, and as a result the pair of left and right roller arms 27 rotate up and down, causing the roller 7 to be raised and lowered. Figures 1 to 8 show the working state with the hydraulic cylinder 32 extended and the roller 7 lowered, while Figures 9 and 10 show the non-working state (storage state) with the hydraulic cylinder 32 retracted and the roller 7 raised.

[0028] The vertical position adjustment handle 33 adjusts the vertical position of the roller 7 when the roller 7 is in the lowered working position. For example, in this embodiment, the vertical position adjustment handle 33 adjusts the vertical position of the roller 7 by changing the relative angle between the first link 30 and the cylinder connecting arm 28 when the hydraulic cylinder 32 is fully extended, but a detailed explanation is omitted.

[0029] [Chisel] The chisel 8 penetrates the soil in front of the front disc row 5, thereby breaking up the soil and assisting in the penetration of the front disc row 5 and the rear disc row 6. The chisel 8 may be a pair, left and right, as in this embodiment, but there may be one or two or more.

[0030] The chisel 8 comprises a chisel bracket 36, a first chisel arm 37, a second chisel arm 38, a soil-crushing blade 39, and a resistance plate 40.

[0031] The chisel bracket 36 is attached to the front disc support frame 4b at a predetermined distance in the left-right direction. The first chisel arm 37 is supported by the chisel bracket 36 so as to be vertically slidable and is fixed to the chisel bracket 36 via bolts B1. In addition, a second chisel arm 38 is detachably fixed to the tip of the first chisel arm 37 via a plurality of bolts B2. Since the second chisel arm 38 is pre-integrated with the soil-crushing blade 39 and resistance plate 40, if the soil-crushing blade 39 and resistance plate 40 wear out or are damaged, the soil-crushing blade 39 and resistance plate 40 can be replaced by attaching and detaching the second chisel arm 38 to the first chisel arm 37.

[0032] Furthermore, the first chisel arm 37 is provided with a plurality of fixing holes 37a arranged in the longitudinal direction. When the first chisel arm 37 is fixed to the chisel bracket 36 so that the bolt B1 passes through the fixing hole 37a on the base end, the soil-crushing blade 39 is in an operational state where it is positioned at the same depth as the front disc row 5, as shown in Figure 5. When the first chisel arm 37 is fixed to the chisel bracket 36 so that the bolt B1 passes through the fixing hole 37a on the tip end, the soil-crushing blade 39 is in a retracted state where it is moved upward, as shown in Figure 11. The chisel 8 of this embodiment can be switched between an operational state where it is driven into the field and a retracted state where it is moved upward and does not act on the soil.

[0033] The soil-crushing blade 39 and the resistance plate 40 are integrally fixed to the second chisel arm 38 by welding or the like. The soil-crushing blade 39 has a sharp, sled-like shape at its front end and penetrates the soil as the machine moves. In addition, the soil-crushing blade 39 is inclined so that it is lower towards the front. This allows the soil-crushing blade 39 to exert a downward vector on the chisel 8 as it moves through the soil, promoting penetration of the front disc row 5 and the rear disc row 6.

[0034] [Weight mounting section] The weight mounting section 10 is configured to allow the weight 9 to be attached and detached. For example, the weight mounting section 10 in this embodiment is integrally configured to include a frame fixing section 10a fixed to the upper surface of the work machine frame 4, a pair of legs 10b rising from both ends of the frame fixing section 10a, and a hanger section 10c connecting the upper ends of the pair of legs 10b, and multiple (for example, three) weights 9 can be attached and detached from the hanger section 10c by hooking them.

[0035] Specifically, the weight 9 has a hook portion 9a, and is attached to the weight mounting portion 10 by hooking this hook portion 9a onto the hanger portion 10c. A fixing bolt B3 is screwed into the hook portion 9a of the weight 9, and by tightening this fixing bolt B3, the hook portion 9a of the weight 9 is tightly pressed against the hanger portion 10c, preventing the weight 9 from falling off. In this embodiment, the weight 9 is a repurposed front weight attached to the front end of the tractor 1, but the weight and shape of the weight 9 can be changed as desired.

[0036] Multiple weight mounting sections 10 are provided, distributed to the front and rear and left and right sides of the implement frame 4. Specifically, the weight mounting section 10 includes a left front weight mounting section 10FL located on the left front of the implement frame 4, a right front weight mounting section 10FR located on the right front of the implement frame 4, a left rear weight mounting section 10RL located on the left rear of the implement frame 4, and a right rear weight mounting section 10RR located on the right rear of the implement frame 4. In this way, the weights 9 can be distributed to the left and right and front and rear of the implement frame 4, thereby reducing the behavior of the tilling implement 3 when subjected to external forces from the field surface and lifting due to bending of the implement frame 4, and stabilizing the penetration of the front disc row 5 and rear disc row 6 into the soil. On the other hand, if the weight 9 is concentrated in the center of the tilling implement 3, and the tilling implement 3 receives an external force biased to one corner due to unevenness in the field, the weight 9 cannot receive the external force. This can cause the tilling implement 3 to shake or wobble, or the implement frame 4 to bend due to the external force, potentially preventing proper tilling. However, the tilling implement 3 of this embodiment can resolve these problems.

[0037] The left front weight mounting section 10FL is provided on the upper surface of the front end of the left reinforcing vertical frame 4f, and the left rear weight mounting section 10RL is provided on the upper surface of the rear end of the left reinforcing vertical frame 4f. The right front weight mounting section 10FR is provided on the upper surface of the front end of the right reinforcing vertical frame 4f, and the right rear weight mounting section 10RR is provided on the upper surface of the rear end of the right reinforcing vertical frame 4f. In this way, the weight mounting sections 10 can be positioned near the four corners of the work machine frame 4, allowing the weight load to be applied in a well-balanced manner. In addition, since the weight mounting sections 10 are positioned as high as possible on the work machine frame 4 (on the upper surface of the reinforcing vertical frame 4f), the possibility of grass and mud accumulating on the weights 9 attached to the weight mounting sections 10 can be reduced.

[0038] Furthermore, as shown in Figure 5, the weight mounting portion 10 (weight 9) is positioned above the disc support shaft 21 in a side view. In this configuration, the weight 9 absorbs the upward load received by the front disc row 5 and the rear disc row 6 from the soil, thereby promoting penetration of the front disc row 5 and the rear disc row 6 into the soil.

[0039] Furthermore, as shown in Figure 5, the weight mounting portion 10 (weight 9) is positioned on a virtual line L passing through the disc support shaft 21 and the spring 20 in a side view. In this configuration, when the spring 20 contracts due to the upward load received by the front disc row 5 and the rear disc row 6 from the soil, the weight 9 supports the spring 20, thereby promoting the penetration of the front disc row 5 and the rear disc row 6 into the soil.

[0040] Furthermore, since the weight attachment portion 10 (weight 9) is positioned near the chisel 8 in a plan view, the load of the weight 9 attached to the weight attachment portion 10 can promote the penetration of the chisel 8.

[0041] Furthermore, the weight mounting section 10 allows for the selection of the number of weights 9 to be attached, and the chisel 8 can be selectively switched between the working state and the retracted state. Based on the selection of these two states, the adaptability to the field can be further improved.

[0042] Furthermore, as shown in Figures 3 and 6, a space S is formed on both the left and right sides of the tilling implement 3, allowing a person to enter. This space S is located between the front disc row 5 and the rear disc row 6, and is situated outside the reinforcing vertical frame 4f. With such a space S, the person can get close to the weight mounting section 10 when attaching or detaching the weight 9, making the attachment and detachment of the weight 9 easier.

[0043] [Effects of the Embodiment] According to this embodiment configured as described above, a disc harrow type tilling implement 3 is connected to the rear of a tractor 1 via a lifting link mechanism 2 and tills the soil in accordance with the movement of the tractor 1, comprising: an implement frame 4 connected to the rear of the tractor 1 via a lifting link mechanism 2; front disc rows 5 arranged at predetermined intervals in the left-right direction below the front of the implement frame 4 and crushing the soil in accordance with the movement of the tractor 1; and rear disc rows 5 arranged at predetermined intervals in the left-right direction below the rear of the implement frame 4 and tilling the soil in accordance with the movement of the tractor 1. The machine comprises a rear row of discs 6 for crushing soil, a roller 7 positioned behind the rear row of discs 6 so as to be vertically adjustable, and a weight 9 positioned on the work machine frame 4. The multiple soil-crushing discs 16 constituting the front row of discs 5 and the rear row of discs 6 are each rotatable about the disc support shaft 21 as the center of rotation, and the weight 9 is positioned above the disc support shaft 21 in a side view, so the weight 9 can absorb the upward load that the soil-crushing discs 16 receive from the soil, thereby promoting the penetration of the soil-crushing discs 16 into the soil.

[0044] Furthermore, the tilling implement 3 is supported by the implement frame 4 so as to be able to rotate up and down, and further comprises a disc arm 19 that rotatably supports the soil-crushing disc 16 via a disc support shaft 21, and a spring 20 that biases the disc arm 19 downward. In a side view, the weight 9 is located on a virtual line L passing through the disc support shaft 21 and the spring 20, so when the spring 20 contracts due to the upward load that the soil-crushing disc 16 receives from the soil, the weight 9 receives the spring 20, thereby promoting the penetration of the soil-crushing disc 16 into the soil.

[0045] Furthermore, the tilling implement 3 is equipped with front weight mounting sections 10FL, 10FR and rear weight mounting sections 10RL, 10RR located on the front and rear sides of the implement frame 4, to which weights 9 can be attached and detached. By selectively attaching weights 9 to the front weight mounting sections 10FL, 10FR and rear weight mounting sections 10RL, 10RR, it is possible to adapt to various field conditions and adjust the front-to-rear balance.

[0046] Furthermore, the front weight mounting sections 10FL and 10FR include a left front weight mounting section 10FL located on the left side of the work machine frame 4 and a right front weight mounting section 10FR located on the right side of the work machine frame 4, and the rear weight mounting sections 10RL and 10RR include a left rear weight mounting section 10RL located on the left side of the work machine frame 4 and a right rear weight mounting section 10RR located on the right side of the work machine frame 4. Therefore, the weight load can be applied evenly to the front and rear and left and right, or the front and rear or left and right weight loads can be made different to improve the balance between the front and rear or left and right. [Explanation of Symbols]

[0047] 1 tractor 2. Lifting link mechanism 2a Top Link 2b Lower Link 3. Disc harrow type tilling machine 4. Work machine frame 4a Mainframe 4b Front disc support frame 4c Reinforced horizontal frame 4d Rear disc support frame 4e Roller support frame 4F Reinforcement vertical frame 5 Front disk row 6. Rear disk row 7 Laura 8 Chisels 9 weights 9a Hook part 10 Weight mounting section 10FL Left front weight mounting area 10FR Right front weight mounting area 10RL Left rear weight mounting area 10RR Right rear weight mounting area 10a Frame fixing part 10b Legs 10c Hanger section 11. Top link mast 12 support plates 13 Top Link Pins 14 Link Bracket 15 Lower Link Pins 16 Soil-crushing discs 17. Disk support mechanism 18 Disc Bracket 18a Spring support 19 Disc Arm 19a Spring support 20 springs 21 Disk support axis 22 Disc arm support shaft 23 Rotation regulating bolts 24 Roller support mechanism 25 Roller Bracket 26 Roller arm support shaft 27 Roller Arm 28 Cylinder connecting arm 29 Cylinder bracket 30. Link 1 31. Second Link 32 Hydraulic Cylinders 33. Adjustable handle for vertical positioning 34 Roller support shaft 35 Connecting shaft 36 Chisel Bracket 37. First Chisel Arm 37a Fixing hole 38. Second Chisel Arm 39 Soil-crushing blade 40 Resistance plate

Claims

1. A disc harrow type tilling implement is connected to the rear of a traveling machine via a lifting link mechanism and tills the soil in accordance with the movement of the traveling machine, A work machine frame connected to the rear of the aforementioned traveling machine body via the aforementioned lifting link mechanism, The front row of discs is arranged at predetermined intervals in the left-right direction on the lower front side of the work machine frame, and crushes soil in accordance with the movement of the traveling machine, The rear disc row is arranged at predetermined intervals in the left-right direction below the rear side of the work machine frame, and crushes soil in accordance with the movement of the traveling machine, A roller is positioned behind the rear disc row so as to be vertically adjustable, The work machine frame comprises a weight placed on the work machine frame, The multiple disks constituting the front disk row and the rear disk row are each rotatable about the disk support axis as the center of rotation. The aforementioned weight is located above the disc support shaft in a side view, characterized in that it is a disc harrow type tilling machine.

2. A disc arm is supported on the work machine frame so as to be able to rotate vertically and supports the disc so as to be able to rotate via the disc support shaft, The disc arm is further equipped with a spring that biases it downward, The disc harrow type cultivator according to claim 1, characterized in that the weight is located on a virtual line passing through the disc support shaft and the spring in a side view.

3. The disc harrow type tilling machine according to claim 1, further comprising a front weight mounting section and a rear weight mounting section, which are arranged on the front and rear sides of the work machine frame and to which the weight can be attached and detached.

4. The aforementioned front weight mounting portion is The left front weight mounting section is located on the left side of the aforementioned work machine frame, The work machine frame includes a right front weight mounting section located on the right side, The aforementioned rear weight mounting portion is The left rear weight mounting section is located on the left side of the aforementioned work machine frame, The disc harrow type cultivator according to claim 3, further comprising a right rear weight mounting portion located on the right side of the workpiece frame.

Images