Scratching working machine

Abstract

To provide a puddling machine which levels soil that has been roughly leveled in advance by a soil-collecting body with a soil-crushing part, thereby achieving a good finish state of puddling work. [Solution] This tillage machine is characterized by comprising: a soil crushing section 3 located behind the traveling body 1, which crushes the soil by rotating and driving the tilling tines 32 as the traveling body 1 moves forward; and a soil piling body 42 located behind the traveling direction of the traveling body 1 and forward of the traveling direction of the soil crushing section 3, which is capable of moving soil into the tracks formed by the traveling body 1 to erase the tracks, wherein the soil piling body 42 is configured so that its forward projection area can be changed depending on the traveling speed, and has a swivel axis A that can rotate the soil piling body 42 horizontally, changing the area of ​​each surface in contact with the soil on both sides of the swivel axis A.

Description

Technical Field

[0001] This invention relates to a rotary tilling machine. More specifically, it relates to a rotary tilling machine that levels the soil roughly leveled in advance by a soil gathering body with a soil crushing part.

Background Art

[0002] As an example of a working machine that performs a rotary tilling operation of cultivating and leveling a field by a cultivating claw that is mounted on a traveling machine body and driven to rotate, there is an invention described in Patent Document 1. In this invention, a soil gathering plate for gathering soil is provided in a groove formed on the field surface by a tire or the like as the traveling machine body passes through. By gathering soil into the groove with this soil gathering plate, the leveling performance is improved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to perform the rotary tilling operation quickly and in a short time, it is necessary to increase the traveling speed of the traveling machine body, that is, the working speed. On the other hand, depending on the soil quality of the soil, the content conditions of the moisture immersed in the soil, and the area of the working field, there are also situations where the working speed cannot be increased. The soil gathering plate provided in the working machine described in Patent Document 1 is not a structure of the soil gathering plate that can cope with changes in the working speed, and when there is a change in the working speed, there is a problem that the soil gathering effect, that is, the effect of erasing the traveling track, cannot be sufficiently exerted.

[0005] Therefore, the present invention has been made by paying attention to the above problems, and an object thereof is to provide a rotary tilling machine that can exhibit a soil gathering effect even when the speed conditions change.

Means for Solving the Problems

[0006] This invention includes a soil crushing part located behind the traveling body, which rotationally drives tilling claws as the traveling body moves forward to crush soil, and a soil gathering body disposed behind the traveling direction of the traveling body and in front of the traveling direction of the soil crushing part, capable of moving soil on the travel track formed by the traveling body to erase the travel track. The soil gathering body is configured to be able to change the front projected area according to the moving speed, and has a pivot axis that can rotate the soil gathering body in the horizontal direction, changing the area of each surface in contact with the soil on both sides of the soil gathering body sandwiching the pivot axis 、 When the working speed is low, the front projected area of the second earth-accumulating body, which is an earth-accumulating body, is reduced, and when the speed is high, the front projected area is increased. This is characterized by a soil scraping working machine, relating to

[0007] This invention The soil gathering body includes a first soil gathering body and a second soil gathering body arranged opposite to each other with a travel track in between, The pivot axis is provided on the first soil gathering body or the second soil gathering body, This is characterized by a soil scraping working machine, relating to

[0008] This invention The pivot axis Among the earth-accumulating bodies composed of a first earth-accumulating body and a second earth-accumulating body arranged opposite to each other with a running track in between is provided on the first soil gathering body and Arranged outside the second earth-accumulating body with respect to the running track a third soil gathering body, This is characterized by a soil scraping working machine, relating to

[0009] This invention The soil gathering body includes a third soil gathering body disposed outside the second soil gathering body with respect to the travel track, The pivot axis is provided on the third soil gathering body, This is characterized by a soil scraping working machine, relating to

[0010] This invention The turning shaft is provided on at least any one of the earth-accumulating bodies, including a first earth-accumulating body and a second earth-accumulating body arranged opposite to each other with a running track in between, and a third earth-accumulating body arranged outside the second earth-accumulating body with respect to the running track. A raking work machine characterized by relates to

[0011] This invention The swivel shaft , the first is provided on all of the first soil banking body, the second soil banking body , the second and the third soil banking body. A raking work machine characterized by relates to

Effect of the Invention

[0012] This invention can provide a raking work machine with a good finish of the raking work because the soil roughly leveled in advance by the soil banking body is leveled by the soil crushing part.

Brief Description of the Drawings

[0013]

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Mode for Carrying Out the Invention

[0014] The raking working machine according to the first embodiment of the present invention will be described with reference to the drawings. 1 is a raking working machine. 11 is a central working body. The central working body 11 is located at the center of the raking working machine 1 and performs raking work. 11L is the left extended working body. The left extended working body 11L is located on the left side of the advancing direction of the central working body 11 and is foldably attached to the central working body 11 to perform raking work. 11R is the right extended working body. The right extended working body 11R is located on the right side of the advancing direction of the central working body 11 and is foldable with the central working body 11 to perform raking work.

[0015] 2 is a frame. The frame 2 has a pipe frame 22. The pipe frame 22 is a frame that forms the skeleton of the raking working machine 1. 20 is a mounting part. 201 is a top link pin. 202 is a lower link pin. The mounting part 20 has a top link pin 201 and a lower link pin 202. The mounting part 20 is attached to a tractor that pulls the raking working machine 1 by these.

[0016] 21 is an input case, and 211 is an input shaft. The input shaft 211 is mounted in the input case 21 and connected to the PTO shaft of the tractor to extract the driving force of the tractor. 212 is a top mast. The top mast 212 is provided on the pipe frame 22. The top mast 212 is provided with a top link pin 201 at its tip. 213 is a lower plate. The lower plate 213 is attached to the pipe frame 22. A lower link pin 202 is attached to the tip of the lower plate 213. 23 is a transmission case. The transmission case 23 is provided on the pipe frame 22 and outputs the driving force from the input shaft 211 provided on the input case 21.

[0017] 24 is a support frame. The support frame 24 is provided at a position symmetric to the transmission case 23 with respect to the input case 21, is provided below the pipe frame 22, and holds the rotor shaft 31 described later. 25 is a fulcrum part. The fulcrum parts 25 are respectively provided at both ends of the pipe frame 22, and are folding rotation fulcrum parts of the extension working body left 11L and the extension working body right 11R. A fulcrum frame 41L protruding upward from the cover body left 4L provided on the extension working body left 11L is rotatably connected to one fulcrum part 25, and a fulcrum frame 41R protruding upward from the cover body right 4R provided on the extension working body right 11R is rotatably connected to the other fulcrum part 25.

[0018] 3 is a soil crushing part. The soil crushing part 3 is provided below the frame 2 and can be rotationally driven to crush the soil in the field. The soil crushing part 3 is provided in the substitute scraping working machine 1 attached to the rear part of a tractor or the like which is a traveling machine body, and is located behind the traveling machine body. As the tractor or the like which is the traveling machine body moves forward, the tilling claws 32 provided in the soil crushing part 3 are rotationally driven to crush the soil. 3L is the left extension soil crushing part. The left extension soil crushing part 3L is rotatably attached to the left extension working body 11L on the left side of the advancing direction of the soil crushing part 3, and can be folded integrally with the left extension working body 11L. 3R is the right extension soil crushing part. The right extension soil crushing part 3R is rotatably attached to the right extension working body 11R on the right side of the advancing direction of the soil crushing part 3, and can be folded integrally with the right extension working body 11R. 31 is a rotor shaft. The rotor shaft 31 is a rotating shaft spanned between the lower parts of the transmission case 23 and the support frame 24, and rotates by the driving force from the transmission case 23. 31L is the left extension side rotor shaft. The left extension side rotor shaft 31L is provided on the left side of the advancing direction of the rotor shaft 31. 31R is the right extension side rotor shaft. The right extension side rotor shaft 31R is provided on the right side of the advancing direction of the rotor shaft 31. The left extension side rotor shaft 31L and the right extension side rotor shaft 31R rotate by the driving force from the transmission case 23.

[0019] 32 is a tilling claw. A plurality of tilling claws 32 are attached around each of a rotor shaft 31, an extended-side rotor shaft left 31L, and an extended-side rotor shaft right 31R, and are driven by the rotation of the rotor shaft 31, the extended-side rotor shaft left 31L, and the extended-side rotor shaft right 31R to till the field. 33 is the center side of the dog clutch. The center side 33 of the dog clutch is provided near each of a transmission case 23 and a support frame 24 at both ends of the soil crushing part 3. 33L is the left extended side of the extended-side dog clutch. The left extended side 33L of the extended-side dog clutch is provided on the right side in the traveling direction of the extended soil crushing part left 3L and meshes with the center side 33 of the dog clutch to form a dog clutch on the left side in the traveling direction. 33R is the right extended side of the extended-side dog clutch. The right extended side 33R of the extended-side dog clutch is provided on the left side in the traveling direction of the extended soil crushing part right 3R and meshes with the center side 33 of the dog clutch to form a dog clutch on the right side in the traveling direction. The dog clutch engages and disengages the rotational drive of the rotor shaft 31, the extended-side rotor shaft left 31L, and the extended-side rotor shaft right 31R.

[0020] 34 is a holding part. The holding part 34 is a bearing part of the rotor shaft 31 and is provided at the lower part of the transmission case 23 and the support frame 24. 34L is the left extended-side holding part. The left extended-side holding part 34L is a bearing part of the rotor shaft 31L and is provided near the left extended side 33L of the extended-side dog clutch at the lower part of a cover body left 4L described later. 34R is the right extended-side holding part. The right extended-side holding part 34R is a bearing part of the rotor shaft 31R and is provided near the right extended side 33R of the extended-side dog clutch at the lower part of a cover body right 4R described later. The holding part 34, the left extended-side holding part 34L, and the right extended-side holding part 34R have bearings and oil seals inside.

[0021] 4 is a cover body. The cover body 4 covers the upper part of the soil crushing part 3. 4L is the cover body left. 4R is the cover body right. The cover body left 4L covers the upper part of the extended soil crushing part left 3L. The right 4R of the cover body covers the upper part of the right 3L of the extended crushed soil part. The cover body 4, the left 4L of the cover body, and the right 4R of the cover body prevent the crushed soil or the cultivated soil from scattering around due to the crushed soil part 3, the left 3L of the extended crushed soil part, and the right 3R of the extended crushed soil part. 41L is the left fulcrum frame. The left fulcrum frame 41L is a member protruding upward for rotatably attaching the left 11L of the extended working body of the sub-scraping working machine 1 to the fulcrum part 25, and is an arm integrated with the left 4L of the cover body. 41R is the right fulcrum frame. The right fulcrum frame 41R is a member protruding upward for rotatably attaching the right 11R of the extended working body of the sub-scraping working machine 1 to the fulcrum part 25, and is an arm integrated with the right 4R of the cover body.

[0022] 42b is a support member for supporting the first soil pushing body 42 described later. The support member 42b of the first soil pushing body 42 is a member for attaching the first soil pushing body 42 to the sub-scraping working machine 1, and is a plate-shaped member arranged and fixed while being curved downward from the lower plate 213. The lower part of the support member 42b is located below the lower end of the cover body 4, and the first soil pushing body 42 is attached to the lower part of the support member 42b. 43b is a support member for supporting the second soil pushing body 43 described later. The support member 43b of the second soil pushing body 43 is a member for attaching the first soil pushing body 42 to the sub-scraping working machine 1, and is a plate-shaped member arranged and fixed so as to hang downward from both ends of the front part of the cover body 4. The lower part of the support member 43b is located below the lower end of the cover body 4, and the second soil pushing body 43 is attached to the lower part of the support member 43b.

[0023] 45 is the front cover. The front cover 45 is located in front of the front ends of the cover body 4, the left 4L of the cover body, and the right 4R of the cover body. Further, the lower end of the front cover 45 is located below the front ends of the cover body 4, the left 4L of the cover body, and the right 4R of the cover body. In the first embodiment, the front cover 45 is arranged in front of the cover body 4. The front cover 45 prevents the scattering of mud and the like that scatters forward from between the cover body 4 and the field surface. 46 is a stand bracket. The stand bracket 46 is a bracket for placing the soil turning machine 1 on a stand (not shown). The stand brackets 46 are respectively arranged at both ends of the front part of the cover body 4, and the stability of the machine body can be ensured when storing or moving using a stand (not shown). 47 is a rear soil guiding body. The rear soil guiding body 47 is a plate-shaped member, which is positioned on the rear side in the traveling direction of the rotor shaft 31, the extended side rotor shaft left 31L, and the extended side rotor shaft right 31R, and is attached to the cover body left 4L or the cover body 4R. Further, the lower end of the rear soil guiding body 47 inclines toward the dog clutch central side 33 as it goes downward and is positioned below the dog clutch central side 33 in a front view. The rear soil guiding body 47 is at the rear part in the traveling direction of the soil turning machine 1, and performs a soil guiding operation of guiding the soil that has passed near the left extended side holding part 34L and the right extended side holding part 34R toward the dog clutch central side 33 as the soil turning machine 1 travels.

[0024] 42 is a first soil guiding body. The first soil guiding body 42 is located in front of the soil crushing part 3 and below the cover body 4, and inclines the surface arranged on one side with respect to the width of one rut formed in the field by the soil turning machine 1 which is a traveling machine body, toward the rear side as it goes toward the outside with respect to the machine body width. The first soil guiding body 42 is installed on the central side of the soil turning machine 1. 42a is a first working surface. The first working surface 42a is provided on the surface of the first soil guiding body 42, and is a surface that performs a soil guiding operation of sequentially sending the contacted soil along this first working surface 42a, toward the rear and the rut groove side as the soil turning machine 1 moves. The upper end part and the lower end part of the first working surface 42a are curved forward to prevent the extruded soil from crossing this curved part and efficiently sending it to the rut groove side.

[0025] 43 is a second soil guiding body. The second soil guiding body 43 is located in front of the soil crushing part 3 and below the cover body 4, and inclines the surface arranged on the other side of the rut, toward the rear side as it goes toward the inside with respect to the width of the soil turning machine 1 which is the machine body width. The second soil pushing body 43 is installed on the end side of the cover body 4 outside the machine body width of the raking working machine 1 compared to the first soil pushing body 42. The first soil pushing body 42 and the second soil pushing body 43 are installed opposite to each other with the width of one rut formed in the field by the raking working machine 1, which is a traveling machine body, in between. 43a is the second working surface. The second working surface 43a is provided on the surface of the second soil pushing body 43. As the raking working machine 1 moves, the soil in contact is sequentially sent along this second working surface 43a to the rear and toward the rut groove side to perform the soil pushing operation. The upper end and the lower end of the second working surface 43a are curved forward to prevent the pushed soil from crossing this curved portion and to efficiently send it to the rut groove side.

[0026] 44 is the third soil pushing body. The third soil pushing body 44 is located in front of the soil crushing part 3 and below the cover body 4. It is arranged on the other side of the rut and the surface located outside the left and right sides with respect to the traveling direction compared to the second soil pushing body 43 is inclined rearward as it faces the inside with respect to the width of the raking working machine 1, which is the machine body width. The third soil pushing body 44 is on the end side of the cover body 4 of the raking working machine 1 and is installed outside with respect to the traveling direction compared to the second soil pushing body 43. The third soil pushing body 44 is attached with a part where one end of the stand bracket 46 is extended downward as a support member. The first soil pushing body 42, the second soil pushing body 43, and the third soil pushing body 44 are installed opposite to each other with the width of one rut formed in the field by the raking working machine 1, which is a traveling machine body, in between.

[0027] 44a is the third working surface. The third working surface 44a is provided on the surface of the third soil pushing body 44. As the raking working machine 1 moves, it is a surface that sequentially sends the soil in contact along this third working surface 44a to the rear and toward the rut groove side to perform the soil pushing operation. The third working surface 44a is directed slightly downward compared to the first working surface 42a and the second working surface. That is, as can be seen from FIG. 4, the first working surface 42a and the second working surface 43a are directed obliquely forward with respect to each other and are not inclined in the vertical direction of the aircraft, which is the depth direction on the drawing plane. As far as the component of the vertical inclination is concerned, they are parallel to each other. As can be seen by referring to FIG. 8, the third working surface 44a is inclined downward with respect to the second working surface 43a. The line segment at the center of the second working surface 43a and the line segment of the third working surface 44a (not shown; equivalent to the contour line drawn immediately to the left of the starting point on the right side of the lead-out line of 44) are not parallel. Therefore, when the soil moves along the surface toward the rut side, it can be sent below the field surface as it moves rearward and toward the rut side. Accordingly, the soil after moving along the third working surface 44a is prevented from protruding above the field surface, so that the rut can be filled while flattening the field surface without damaging it.

[0028] The area of the second working surface 43a of the second soil-accumulating body 43 is smaller than the area of the first working surface 42a of the first soil-accumulating body 42, and the area of the third working surface 44a of the third soil-accumulating body 44 is smaller than the area of the second working surface 43a. The area of the second working surface 43a of the second soil-accumulating body 43 is smaller than the area of the first working surface 42a of the first soil-accumulating body 42, and the area of the third working surface 44a of the third soil-accumulating body 44 is smaller than the area of the second working surface 43a. That is, the working areas of the first working surface 42a, the second working surface 43a, and the third working surface 44a are set to be different from each other.

[0029] As shown in FIG. 4 showing the bottom view, α is the first angle of the first soil-accumulating body 42. The first angle α is the angle with respect to the traveling direction of the first soil-accumulating body 42. Similarly, β is the second angle of the second soil-accumulating body 43. The second angle β is the angle with respect to the traveling direction of the second soil-accumulating body 43. Similarly, γ is the third angle of the third soil-accumulating body 44. The third angle γ is the angle with respect to the traveling direction of the third soil-accumulating body 43.

[0030] In a plan view or a bottom view, a third angle γ, which is the angle formed by the traveling direction and the third working surface 44a, is larger than a second angle β, which is the angle formed by the traveling direction and the second working surface 43a, and a first angle α, which is the angle formed by the traveling direction and the first working surface, is larger than the third angle γ, which is the angle formed by the traveling direction and the third working surface 44a. That is, the first angle α, the second angle β, and the third angle γ are set to different angles from each other. As shown in FIG. 2 which is a plan view and FIG. 3 which is a side view seen from the left side in the traveling direction, the front end of the first earth retaining body 42 is located behind the front end of the second earth retaining body 43. The second earth retaining body 43 protrudes in the traveling direction more than the first earth retaining body 42. Originally, the first earth retaining body 42 would have a better filling effect if it protruded in the traveling direction, but the first earth retaining body 42 cannot protrude in the traveling direction in order to avoid contact with the tires or crawlers of the tractor when the three-point link moves up and down.

[0031]

[0032] The front end of the third earth retaining body 44 is located behind the front end of the first earth retaining body 42. In order to catch the flow of soil overflowing from the second earth retaining body 43, the third earth retaining body 44 is provided to a certain extent behind the second earth retaining body 43. If the third earth retaining body 44 is too far in front of the second earth retaining body 43, the distance between the second earth retaining body 43 and the third earth retaining body 44 becomes narrow, and the flow of soil passing through this space deteriorates. The front ends of the first earth retaining body 42, the second earth retaining body 43, and the third earth retaining body 44 all protrude in front of the front end of the cover body 4. The first earth retaining body 42 is disposed near the center of the cover body 4 in the width direction of the machine body, and the second earth retaining body 43 and the third earth retaining body 44 are respectively disposed at the ends of the cover body 4 in the width direction of the machine body. Before the soil reaches the soil crushing part 3 located behind the front end part of the cover body 4, the flow of the soil can be determined and the soil can be sent to the rut groove in advance.

[0033] The first earth retaining body 42 is attached to a support member 42b disposed downward from a mounting portion 20 for mounting on the scarifier 1 which is a traveling machine body. 46 is a stand bracket. The stand bracket 46 is arranged between the second embankment body 43 and the third embankment body 44 in a plan view, and a stand (not shown) can be attached thereto. 34 is a holding part. The holding part 34 is located behind the third embankment body 44 and holds the rotation axis of the soil crushing part 3. The holding part 34 is attached to the lower parts of the transmission case 23 and the support frame 24 respectively.

[0034] 5 is a land leveling body. The land leveling body 5 is attached to the rear part of the cover body 4 at the rear part in the working direction of the scraping working machine 1. It levels the field as it progresses. 5L is a left land leveling body. The left land leveling body 5L is attached to the rear part of the left cover body 4L and constitutes the left end part in the working direction of the land leveling body 5. 5R is a right land leveling body. The right land leveling body 5R is attached to the rear part of the right cover body 4R and constitutes the right end part in the working direction of the land leveling body 5.

[0035] 51 is a first land leveling body. The first land leveling body 51 levels the land on the front side rather than the rear end side of the scraping working machine 1 as shown in FIG. 2 showing a plan view of the scraping working machine 1 according to the first embodiment of the present invention. A first left land leveling body 51L is located at the left end part in the traveling direction of the first land leveling body 51, and a first right land leveling body 51R is located at the right end part in the traveling direction. 512 is a fulcrum shaft. 52 is a hinge. The hinge 52 is attached as a rotation fulcrum for vertically rotating the first land leveling body 51, the first left land leveling body 51L, and the first right land leveling body 51R of the land leveling body 5 with respect to the cover body 4, the left cover body 4L, and the right cover body 4R via the fulcrum shaft 512.

[0036] 56 is a second land leveling body. The second land leveling body 56 levels the land at the rear end side of the first land leveling body 51 attached to the working machine 1 as shown in FIG. 2 showing a plan view of the scraping working machine 1. 56L is a left second land leveling body. The left second land leveling body 56L levels the land behind the left cover body 4L located on the left side in the traveling direction. 56R is the right second soil leveling body. The right second soil leveling body 56R levels the area behind the right 4R of the cover body located on the right side in the traveling direction. 562 is the pivot point. The pivot point 562 is provided at the rear ends of the first soil leveling body 51, the left first soil leveling body 51L, and the right first soil leveling body 51R, enabling the second soil leveling body 56, the left second soil leveling body 56L, and the right second soil leveling body 56R to rotate vertically with respect to the first soil leveling body 51, the left first soil leveling body 51L, and the right first soil leveling body 51R.

[0037] As shown in Table 1, in terms of both the front projection area and the actual area, the sizes of the working surfaces of the first soil pushing body 42, the second soil pushing body 43, and the third soil pushing body 44 are in the order of the first soil pushing body 42 > the second soil pushing body 43 > the third soil pushing body 44 and become smaller. Since the first soil pushing body 42 has the largest front projection area and actual area, it has a large soil capture amount and a large soil pushing effect in the low-speed range. Although the second soil pushing body 43 has a smaller front projection area and actual area than the first soil pushing body 42, it is less likely to resist the soil pushed from the traveling direction, and since it can move efficiently along the second working surface 43a, it has a large soil pushing effect in the high-speed range. The third soil pushing body 44 assists the second soil pushing body 43 in soil pushing in the high-speed range, captures the soil and mud that overflow from the front of the second soil pushing body 43 to the side of the third soil pushing body 44 side, and can move it to the center side with respect to the working width. The first soil pushing body 42, the second soil pushing body 43, and the third soil pushing body 44 each have different characteristics and roles in different speed ranges.

[0038] The reason why the working area of the second soil pushing body 43 is smaller than that of the first soil pushing body 42 in terms of both the front projection area and the actual area will be explained. Simply, when the second soil pushing body 43 is arranged symmetrically with respect to the first soil pushing body 42 across the width of the tire track, especially when the working speed of the soil turning machine 1 is increased, the amount of soil movement increases, and the filled tire track may cause the soil to bulge instead. To prevent this, the working area of the second soil pushing body 43 arranged symmetrically with respect to the first soil pushing body 42 across the width of the tire track is made smaller in terms of both the front projection area and the actual area to adjust the amount of soil filled back into the tire track.

[0039] As shown in Table 1, the reason why the working area of the third soil piling body 44 is smaller than the front projection area and the actual area of the working area of the second soil piling body 43 will be explained. When the working speed of the raking work machine 1 is increased, soil may overflow from the front end of the second soil piling body 43 to the outer side. The third soil piling body 44 captures this overflowing soil and moves it toward the rut via the rear of the second soil piling body 43. Since the third soil piling body 44 serves as an auxiliary to the second soil piling body 43, the area of the third working surface 44a of the third soil piling body 44 is smaller than the front projection area and the actual area of the area of the second working surface 43a of the second soil piling body 43. Conversely, if it is made larger, the amount of soil filled back into the rut will increase, and conversely, there will be a disadvantage of forming rut ridges.

[0040] The size of the working surface area of the first soil piling body 42 is approximately the same as the total size of the working surface areas of the second soil piling body 43 and the third soil piling body 44 in terms of the front projection area. In terms of the actual area, although the total of the second soil piling body 43 and the third soil piling body 44 exceeds the first soil piling body 42, due to the difference in the front projection areas of the respective soil piling bodies formed by the working angles of the respective soil piling bodies described later and the combination of the arrangements of the respective soil piling bodies, an optimal soil piling effect can be realized even in different speed ranges.

[0041] The size of the first soil piling body 42 will be described. Although the first soil piling body 42 can increase the amount of soil to be moved, depending on the soil quality, because the angle of the first angle α described later is large, the soil may have poor efficiency in moving while changing its direction toward the rut side, that is, in the width direction as it progresses. Specifically, some of the soil that collides relatively from the front in the advancing direction with the first working surface 42a of the first soil piling body 42 may try to escape upward. In order to receive this escaping soil, the area of the first working surface 42a of the first soil piling body 42 is enlarged. In particular, the area is enlarged upward.

[0042] The shape of the first soil piling body 42 will be described. The upper end of the first soil pushing body 42 provided on the first soil pushing body 42 is curved forward. Due to this curvature, it prevents the soil from moving over the first soil pushing body and moves it forward and to the rut side of the first working surface 42a of the first soil pushing body 42. Also, the upper end of the first working surface 42a is inclined downward toward the rut side. The front side of the first working surface 42a of the first soil pushing body 42, that is, the side located far from the rut, has a longer lateral movement distance. For this reason, the above-mentioned heaving of the soil occurs. On the other hand, the rear side of the first working surface 42a of the first soil pushing body 42, that is, the side close to the rut, has a shorter lateral movement distance, so the soil moves to the rut side before moving upward. Therefore, even if the inner upper end on the rut side, that is, the inner side, is inclined downward, it is less likely to cause problems in soil movement.

[0043] The angles of each working surface will be described. As described above, the first soil pushing body 42 and the second soil pushing body 43 have different preferred working speeds from each other, and the angles are set based on this. By taking a larger angle with the traveling direction, the first soil pushing body 42 increases the projected area when viewed from the front in the traveling direction, so that more soil can be pushed. In the first embodiment, the most suitable angle of the first soil pushing body 42 is 65 degrees, and the preferred angle range is 60 to 70 degrees. If it is larger than 70 degrees, the soil flow becomes poor and the towing resistance of the subsoiler 1 increases. If the angle is less than 60 degrees, the soil movement efficiency in the low-speed range decreases.

[0044] The second soil pushing body 43 is set to have a smaller angle with the traveling direction than the first soil pushing body 42. In the first embodiment, the most suitable angle of the second soil pushing body 43 is 45 degrees, and the preferred angle range is 40 to 50 degrees. This is a consideration for improving the flow of soil even when the traveling speed increases. When the traveling speed of the rotary tiller 1 increases, the flow of the soil that collides with the first soil gathering body 42 having a large angle with respect to the traveling direction deteriorates, while the second soil gathering body 43 having an angle smaller than that of the first soil gathering body 42 with respect to the traveling direction can improve the flow of the soil compared with the first soil gathering body 42. That is, in a high speed range, the second soil gathering body 43 can move more soil than the first soil gathering body 42. From this, the first soil gathering body 42 and the second soil gathering body 43 can ensure the amount of soil for filling the rut under a wide working speed range. Incidentally, the conventional speed during rotary tilling work is about 1 to 3 km / h. The working speed in the embodiment is 1 to 5.5 km / h.

[0045] As shown in Table 1, the third soil gathering body 44 is set to have a small area in both the front projected area and the actual area. Therefore, compared with the second soil gathering body 43 to secure the front projected area, the angle is slightly larger. In the first embodiment, the most suitable angle is 50 degrees, and the suitable angle range is 45 to 55 degrees. By the third soil gathering body 44, the soil and soil clods can be sent to the soil crushing part 3 while avoiding passing near the transmission case 23, the support frame 24, which are parts without the rotation area of the tilling claws, and the holding part 34 that holds the soil crushing part 3 attached thereto. For this reason, it is possible to prevent the deterioration of the rotary tilling performance due to poor soil crushing of the soil and soil clods.

[0046] In order to avoid interference with the traveling machine body located in the front, the tips of the first soil gathering body 42, the second soil gathering body 43, and the third soil gathering body 44 are set not to protrude forward from the tip of the mounting part 20. Further, since the tips of the first soil gathering body 42, the second soil gathering body 43, and the third soil gathering body 44 protrude forward from the front end of the cover body 4, it is possible to finish the movement of the soil before reaching the rotation area of the tilling claws 32, thereby improving the soil crushing performance.

[0047] The stand bracket 46 will be described. The stand bracket 46 is a holding member for attaching a stand (not shown) for grounding the tilling machine alone during storage. In particular, when storing the extension working part in a folded state, since the center of gravity becomes high, for the purpose of ensuring stability when grounded, it is advisable to provide the stand at a position as wide as possible in the width direction of the machine body. In the case of the first embodiment, stability is ensured by installing it at the end of the cover body 4 at the front of the transmission case 23 and the support frame 24.

Table 1

[0048] The second embodiment of this invention will be described mainly with reference to FIGS. 11 to 18. The second embodiment is provided with a second soil-accumulating body 43 having the following configuration in the first embodiment. The first soil-accumulating body 42 and the third soil-accumulating body 44 may also have the same structure.

[0049] Including the second soil-accumulating body 43, the first soil-accumulating body 42, the second soil-accumulating body 43, and the third soil-accumulating body 44, which are soil-accumulating bodies, are arranged behind the traveling direction of the tractor, which is the traveling body, and in front of the traveling direction of the soil-crushing part 3, and it is possible to move the soil on the traveling track formed by the tractor to erase the traveling track. The second soil-accumulating body 43 in the second embodiment is provided at both left and right ends of the cover body 4. In the description of the second embodiment, the second soil-accumulating body 43 provided at the left end of the cover body 4 is used for description. Since the second soil-accumulating body 43 provided at the right end has a symmetrical shape to the second soil-accumulating body 43 provided at the left end, the description is omitted because it is repetitive. Also, it will be described that the rut is positioned on the center side with respect to the traveling direction of the tilling working machine 1 with respect to the second soil-accumulating body 43 at the left end of the cover body 4. Also, the first soil-accumulating body 42 and the third soil-accumulating body 44 may also have the same structure. The second soil-accumulating body 43, which is a soil-accumulating body, is positioned at the edge of the rut, which is the traveling track, to move the soil to the rut, erase the trace of the rut, and level it. The upper part of the second soil-accumulating body 43 is bent so as to be slightly inclined forward, preventing the soil moving along the front of the second soil-accumulating body 43 from climbing onto the second soil-accumulating body 43 and moving backward.

[0050] 46 is a cover body side protruding piece. The cover body side protruding piece 46 is provided on the cover body 4. The cover body side protruding piece 46 is made to protrude forward in the traveling direction of the soil scraping working machine 1 from the cover body 4. 47 is a mounting base. The mounting base 47 is mounted on the front surface in the traveling direction of the cover body 4. 471 are the left and right position adjustment holes of the mounting base 47. A plurality of left and right position adjustment holes 471 of the mounting base 47 are provided, and the mounting base 47 can be mounted by selecting the left and right positions with respect to the left and right in the traveling direction. 472 is a contact piece. The contact piece 472 is provided facing forward in the traveling direction of the mounting base 47 and can be brought into contact with a regulating piece 64 described later.

[0051] A is a pivot shaft. 62 is a fulcrum boss. 61 is a fulcrum pipe. The pivot shaft A is composed of the fulcrum pipe 61 and the fulcrum boss 62. The fulcrum boss 62 is a cylindrical member with its axial direction facing up and down, and is fixedly provided at the front end of the contact piece 472. The fulcrum boss 62 may be directly provided on the mounting base 47. The fulcrum pipe 61 is provided inside the cylindrical inner diameter of the fulcrum boss 62 and can move up and down in the axial direction and pivot around the axis. By the pivot shaft A, the soil pushing body (the second soil pushing body 43) integrally provided on the front side with respect to the fulcrum pipe 61 can be pivoted in a substantially horizontal direction. By pivoting the soil pushing body (the second soil pushing body 43), the front projected area of the second soil pushing body 43 when viewed from the front in the traveling direction can be changed. The second soil pushing body 43 can change the areas of both the left and right sides of the soil pushing body 43 sandwiching the pivot shaft A, that is, one side with respect to the left and right width in the traveling direction from the pivot shaft A and the other side with respect to the left and right width in the traveling direction from the pivot shaft A, by selecting the mounting position of the second soil pushing body 43 with respect to the left and right in the traveling direction of the pivot shaft A. The pivot shaft A can move the second soil pushing body 43, which is a soil pushing body, up and down by the fulcrum boss 62, and can fix the second soil pushing body 43 at an arbitrary position with respect to the up and down direction. The pivot shaft A and the fulcrum boss 62 can change the position in the left and right width direction with respect to the crushing soil part 3 by the mounting base 47 and can change the position of the second soil pushing body 43, which is a soil pushing body, in the left and right width direction.

[0052] 71 is an elastic member. The elastic member 71 biases the second soil retaining body 43 that can be rotated by the rotation axis A in one rotation direction. In the second embodiment, the elastic member 71 acts as a tension spring that pulls the central side end portion of the cover body 4L of the second soil retaining body 43 in the direction of the cover body 4 that is rearward. 64 is a restricting member (restricting piece). 472 is a contact piece. The contact piece 472 is a plate-like member having a base attached to the attachment base 47, and the tip directed forward contacts the restricting member 64. The restricting member 64 is a bifurcated member attached to the fulcrum pipe 61. The restricting member 64 rotates integrally with the second soil retaining body 43 that is a soil retaining body, and restricts the range in which the second soil retaining body 43 can rotate by contacting the contact piece 472. That is, the second soil retaining body 43 can rotate within the range until the contact piece 472 contacts between the bifurcated restricting member 64.

[0053] 65 is a vertical position adjustment hole, 66 is an upper collar, and 67 is a lower collar. The vertical position adjustment hole 65 is a through hole provided in a plurality in the axial direction of the fulcrum pipe 61. The upper collar 66 and the lower collar 67 are provided on the fulcrum pipe 61 so as to sandwich the fulcrum boss 62 in the vertical direction, and restrict the vertical movement of the fulcrum pipe 61 with respect to the fulcrum boss 62. Further, the upper collar 66 in the second embodiment is provided integrally with the restricting member 64. The vertical position adjustment hole 65 adjusts the vertical position of the fulcrum pipe 61 by selecting the vertical attachment positions of the fulcrum pipe 61, the upper collar 66, and the lower collar 67. 431 is a relative position adjustment hole for the relative position of the second soil retaining body 43 with respect to the left and right in the traveling direction with respect to the plurality of fulcrum pipes 61 provided in the second soil retaining body 43. The relative position adjustment hole 431 is the attachment position of the fulcrum pipe 61 and the second soil retaining body 43. The second soil retaining body 43 adjusts the left and right positions with respect to the rotation axis A by selecting the relative position adjustment hole 431 that is the attachment position of the fulcrum pipe 61 and the second soil retaining body 43. The relative position adjustment hole 431 for the fulcrum pipe 61, which is the attachment position between the second earth retaining body 43 and the pivot axis A, avoids the center in the width direction of the surface of the second earth retaining body 43. That is, it is offset from the center in the width direction of the second earth retaining body 43. In the case of the second embodiment, the center of the four holes of the relative position adjustment hole 431 for the fulcrum pipe is approximately the center in the width direction of the surface of the second earth retaining body 43.

[0054] 681(68), 682(68) are fixing members. The fixing members 681(68), 682(68) are bolts, and are fixed to the fulcrum pipe 61 by passing through the upper collar 66 and the lower collar 67 through the vertical position adjustment holes 65. The fulcrum pipe 61 can be attached by the upper collar 66 and the lower collar 67 to which the fixing members 681(68), 682(68) are attached so as not to be movable in the vertical direction with respect to the fulcrum boss 62. A second earth retaining body 43, which is an earth retaining body, is fixed in front of the fulcrum pipe 61, and the fulcrum pipe 61 serves as a substantial pivot axis A of the second earth retaining body 43. The fulcrum pipe 61 can slide in the vertical direction and pivot around the axis with respect to the fulcrum boss 62. By pulling out the fulcrum pipe 61 from the fulcrum boss 62, the second earth retaining body 43 can be attached and detached. A plurality of vertical position adjustment holes 65 are provided in the fulcrum pipe 61, and the upper collar 66 and the lower collar 67 can select and fix the vertical position and restrict the vertical movement of the fulcrum pipe 61. Therefore, the vertical position of the earth retaining body (the second earth retaining body 43) can be adjusted.

[0055] The restricting body 64 provided on the upper collar 66 branches into two. The contact piece 472 protruding forward from the mounting base 47 is positioned between the two branches of the restricting body 64. When the restricting body 64 contacts the contact piece 472, the pivoting of the fulcrum pipe 61 is restricted. In the second embodiment, the elastic member 71 spans between the pivot shaft side protruding piece 63 provided upward from the upper part of the upper collar 66 and the pivot shaft side protruding piece 63 provided on the attachment base 47 or the cover body 4. The elastic member 71 biases the soil pushing body (the second soil pushing body 43) to pivot to one side via the upper collar 66 and the fulcrum pipe 61. In the embodiment, a tension spring is shown, but a compression spring, a coil spring, or an elastic member 71 using fluid pressure arranged to pivot to one side may also be used.

[0056] In the second embodiment, the second soil pushing body 43 can change the projected area when viewed from the front side in the traveling direction by pivoting substantially horizontally about the pivot shaft A according to the traveling speed. Since the soil roughly leveled in advance by the soil pushing body (the second soil pushing body 43) is crushed by the crushing part 3 and leveled by the leveling part, the finish state of the raking work becomes good. By changing the front projected area of the second soil pushing body 43, the amount and momentum of the soil pushed and moved to the side can be adjusted according to the traveling speed, so that the leveling can be made even flatter.

[0057] In the second embodiment, the pivoting of the soil pushing body (the second soil pushing body 43) that changes the front projected area is performed by the force of the soil colliding with the soil pushing body (the second soil pushing body 43) as the soil cultivation machine 1 travels in the forward direction. The change ratio of the front projected area of the soil pushing body (the second soil pushing body 43) is preferably 1.2 to 1.5 times from the smallest area to the largest area. In the embodiment, 1.35 times is adopted. In the second embodiment (shown in the figure), when the working speed shifts from low speed (the first speed) to high speed (the second speed), the front projected area gradually shifts from the smallest area to the largest area due to the pushing force of the soil being pushed.

[0058] In the second embodiment, the attachment of the second soil pushing body 43 to the pivot shaft A is selected from a plurality of left - right relative position adjustment holes 431 at the attachment position, so that the relative position of the second soil pushing body 43 with respect to the left and right in the traveling direction of the pivot shaft A can be moved. That is, the areas on both the left and right sides of the soil pushing body 43 sandwiching the pivot shaft A can be changed. In the second embodiment, the attachment of the fulcrum pipe 61 constituting the turning axis A to the second soil retaining body 43 uses two of the holes 431 for adjusting the left - right relative position with the fulcrum pipe 61, specifically, the two at the tip side on the proximity end side to the cover body 4 of the second soil retaining body 43 on the left side shown in FIG. 18. Regarding the relative position with the second soil retaining body 43 when viewed from the front facing the surface of the second soil retaining body 43 that the turning axis A has, the areas on both sides in the width direction of the second soil retaining body 43 across the turning axis A are provided such that the area on the side closer to the rut side is smaller and the area on the side farther from the rut is larger. The turning axis A of the second soil retaining body 43 is attached closer to the center in the width direction with respect to the advancing direction of the cover body 4 of the second soil retaining body 43 on the left side shown in FIG. 18. Also, since the elastic member 71 is provided on the side closer to the rut side, which is closer to the center in the width direction with respect to the advancing direction in plan view, a force is applied to constantly turn the side of the second soil retaining body 43 closer to the rut side backward.

[0059] Also, in FIG. 18, the area on the side away from the front side from the cover body 4, which is the area on the right side of the fulcrum pipe 61 of the second soil retaining body 43 in the figure, that is, the area on the side where the second soil retaining body 43 moves away from the rut from the turning axis A, is larger than the area on the side close to the cover body 4L, which is the area on the left side in the figure, that is, the area on the side where the second soil retaining body 43 approaches the rut from the turning axis A. Therefore, the second soil retaining body 43 receives more soil pressure on the left side in the advancing direction, which is the right side in the figure. When the soil collides with the second soil retaining body 43 as the scraping machine 1 advances, due to the impact force, with the turning axis A as the rotation center, the second soil retaining body 43 rotates counterclockwise and turns left. That is, the inclination angle of the second soil retaining body 43 in plan view rotates from one side, which is the posture standing vertically forward with respect to the front end of the cover body 4 shown by the two - dotted chain line in FIG. 18, to the other side, which is the posture falling parallel to the front end of the cover body 4 shown by the solid line.

[0060] As the advancing speed increases, the force of impact on the soil embankment body (the second soil embankment body 43) also increases. The impact force becomes a force that causes the soil embankment body (the second soil embankment body 43) to rotate to the other side around the pivot axis A. When this rotational force to the other side becomes greater than the biasing force of the elastic member 71 that biases to one side, the rotation of the second soil embankment body 43 is initiated. In the second embodiment, in plan view, the second soil embankment body 43 rotates counterclockwise, i.e., to the left.

[0061] Conversely, when the advancing speed decreases, the force of soil impact also decreases. Therefore, due to the biasing force of the elastic member 71 that biases to one side, the soil embankment body (the second soil embankment body 43) rotates so as to return to its original position on one side. In the second embodiment, with the pivot axis A as the center of rotation, the second soil embankment body 43 rotates clockwise, i.e., to the right. As shown in the enlarged plan view of the soil embankment body of the raking working machine according to the second embodiment of the present invention in Fig. 18, the solid-line drawn portions of the second soil embankment body 43 and the regulating piece 64 which is a regulating portion indicate the high-speed state (after rotation), and the two-dot chain-line drawn portions indicate the low-speed state (before rotation). That is, at the attachment position between the pivot axis A and the hole 431 for adjusting the left-right relative position between the pivot pipe 61 in the second soil embankment body 43, the action of whether the second soil embankment body 43 rotates in which direction at high speed and low speed is determined. Depending on the position of the second soil embankment body 43 relative to the pivot axis A, when receiving the resistance of the soil, it is determined in which direction the second soil embankment body 43 rotates. Due to the positional relationship between the pivot axis A and the second soil embankment body 43, depending on the size of the left and right areas respectively with respect to the pivot axis A when viewed from the surface where the soil of the second soil embankment body 43 flows, it is determined which side is the side where the area of the working machine advancing and receiving the resistance of the soil is large. When the advancing speed increases, the second soil embankment body 43 rotates backward toward the side that is more likely to receive the resistance of the soil, i.e., the longer side or the side with a larger area in plan view.

[0062] The rotation of the soil embankment body (the second soil embankment body 43) is limited in the range in which it can rotate by the regulating body 64, so it is possible to prevent the soil embankment body (the second soil embankment body 43) from continuing to rotate. Therefore, since the moving direction of the soil can be continuously directed along the rut, the track erasing operation can be carried out without interruption. Since the elastic member 71 is constantly biased in one turning direction, when the impact of the soil disappears or the impact force of the soil decreases, it can return to its original position. Further, by appropriately adjusting the attachment position, the material of the elastic member 71, the form, etc., the biasing force can be adjusted, and adjustment with the impact addition and subtraction of the soil can be performed.

[0063] In the case of the second embodiment, when the working speed is, for example, a low speed (first speed) of about 1 to 3 km / h, the trace elimination surface of the soil pushing body (second soil pushing body 43) is directed toward the center side of the rut, the front projected area is reduced, and the soil is moved little by little into the rut. When the working speed is, for example, a high speed (second speed) of about 3 to 6 km / h, more soil can be moved into the rut by directing the trace elimination surface of the second soil pushing body 43, which is the soil pushing body, from the center side of the rut toward the front side in the traveling direction. That is, when the working speed is low, the front projected area of the second soil pushing body 43, which is the soil pushing body, is reduced, and when the working speed is high, the front projected area is increased. Since more soil pushed away by the traveling machine body is generated in a larger amount than when the speed is low due to the momentum of the traveling speed on the sides of the rut formed when the working speed is high, the soil can be efficiently moved by increasing the front projected area.

[0064] The third embodiment of this invention shown in FIG. 19 will be described. The third embodiment is provided with a second soil pushing body 43 having the following configuration in the first embodiment. The first soil pushing body 42 and the third soil pushing body 44 may also have the same structure. In FIG. 19, the second soil pushing body 43 shown by the solid line indicates the low speed, and the second soil pushing body 43 shown by the two-dot chain line indicates the high speed. In the third embodiment, the attachment of the fulcrum pipe 61 constituting the turning shaft A to the second soil pushing body 43 uses two at the tip side on the side separated from the cover body 4 of the second soil pushing body 43 on the right side shown in FIG. 19 among the left-right relative position adjustment holes 431. When viewed from the front facing the surface of the second soil pushing body 43, regarding the relative position between the turning shaft A and the second soil pushing body 43, the areas on both sides in the width direction of the second soil pushing body 43 sandwiching the turning shaft A are provided such that the area on the side closer to the rut side is larger and the area on the side away from the rut is smaller.

[0065] In the third embodiment, the elastic member 71 is a compression spring. The elastic member 71 biases the second earth retaining body 43, which is an earth retaining body rotatable about the pivot axis A, in one rotational direction. In the third embodiment, the elastic member 71 acts as a compression spring that applies a force to rotate the end portion of the second earth retaining body 43 on the rut side in a direction away from the front end of the cover body 4, that is, in one rotational direction. In the third embodiment, the elastic member 71 is bridged between a pivot axis side protruding piece 63 provided on the upper collar 66 and a cover body side protruding piece 46 provided on the mounting base 47 or the cover body 4. The elastic member 71 biases the earth retaining body (the second earth retaining body 43) to rotate to one side via the upper collar 66 and the fulcrum pipe 61. In the embodiment, a compression spring is shown, but a tension spring, a coil spring, or an elastic member 71 using fluid pressure arranged to rotate to one side may also be used.

[0066] 72 is a telescopic rod. In the third embodiment, the telescopic rod 72 installed at the center of the elastic member 71 guides the elastic member 71. In the third embodiment, by selecting the attachment position of the pivot axis A to the second earth retaining body 43 from the holes 431 for adjusting the left-right relative position with the fulcrum pipe, which are the attachment positions, the areas on both sides of the earth retaining body 43 sandwiching the pivot axis A can be changed. In the third embodiment, the attachment of the fulcrum pipe 61 constituting the pivot axis A to the second earth retaining body 43 uses two on the end side away from the cover body 4L of the second earth retaining body 43, which is the right side shown in FIG. 19, among the holes 431 for adjusting the left-right relative position.

[0067] Therefore, the pivot axis A of the second earth retaining body 43 is attached to the side away from the cover body 4 of the second earth retaining body 43, which is the right side shown in FIG. 19. When viewed from the surface where the soil of the second earth retaining body 43 moves, the relative attachment position relationship between the second earth retaining body 43 and the pivot axis A is such that the pivot axis A is arranged at a position shifted laterally from the center while avoiding the middle of the second earth retaining body 43. In a plan view, the middle of the soil movement surface of the second earth retaining body 43 corresponds to the middle of the four holes of the holes 431 for adjusting the relative position. When viewed from the surface where the soil of the second soil piling body 43 moves, the area closer to the cover body 4 on the left side in the figure than the fulcrum pipe 61 that serves as the substantial fulcrum axis A is larger than the area on the side away from the cover body 4 on the right side in the figure from the fulcrum pipe 61.

[0068] Therefore, the second soil piling body 43 receives more soil pressure on the left side in the figure with a larger area. When the soil collides with the second soil piling body 43 as the scraping working machine 1 advances, due to the collision force, with the pivot axis A as the rotation center, the second soil piling body 43 rotates clockwise, i.e., rotates to the right. That is, the inclination angle of the second soil piling body 43 in plan view rotates from one side in the posture of falling parallel to the front end of the cover body 4 shown by the solid line in Fig. 19 to the other side in the posture of standing upright facing forward which is perpendicular to the front end of the cover body 4 shown by the two-dot chain line. In the third embodiment, other configurations are the same as those in the second embodiment.

[0069] As the advancing speed increases, the force of collision with the soil piling body (the second soil piling body 43) also increases. The collision force becomes the force that rotates the soil piling body (the second soil piling body 43) to the other side around the pivot axis A. When this rotation force to the other side becomes larger than the biasing force of the elastic member 71 that biases to one side, the rotation of the second soil piling body 43 is started. In the third embodiment, the second soil piling body 43 rotates clockwise, i.e., rotates to the right.

[0070] Conversely, when the advancing speed decreases, the force of soil collision also decreases. Therefore, due to the biasing force of the elastic member 71 that biases to one side, the soil piling body (the second soil piling body 43) rotates so as to return to the original position on one side. In the third embodiment, with the pivot axis A as the rotation center, the second soil piling body 43 rotates counterclockwise, i.e., rotates to the left. As shown in the enlarged plan view of the soil piling body of the scraping working machine according to the third embodiment of the present invention in Fig. 19, the portion of the second soil piling body 43 and the regulating body 64 which is the regulating part drawn with a solid line indicates the low speed state (before rotation), and the portion drawn with a two-dot chain line indicates the high speed state (after rotation).

[0071] Since the turning of the earth moving body (the second earth moving body 43) is limited in the range in which it can turn by the restricting body 64, it is possible to prevent the earth moving body (the second earth moving body 43) from continuing to turn. Therefore, since the moving direction of the soil can be continuously directed toward the rut, the track erasing operation can be performed without interruption.

[0072] Since the elastic member 71 is constantly biased in one turning direction, when the impact of the soil disappears, it can be returned to its original position. Further, by appropriately adjusting the attachment position, the material of the elastic member 71, the form, etc., the biasing force can be adjusted, and adjustment with the impact addition and subtraction of the soil can be performed. In the third embodiment, when the working speed shifts from low speed to high speed by changing the relative positional relationship between the earth moving body and the turning shaft A and changing the type of the elastic member 71 and the positional relationship of its arrangement, the front projected area can be gradually shifted from a large area to a small area.

[0073] In the case of the third embodiment, when the working speed is, for example, a low speed (the first speed) of about 1 to 3 km / h, the track erasing surface of the earth moving body (the second earth moving body 43) is directed toward the center side of the rut groove, the front projected area is increased, and the soil is actively moved into the rut. When the working speed is, for example, a high speed (the second speed) of about 3 to 6 km / h, the soil moving surface of the second earth moving body 43 which is the earth moving body is directed toward the side in the traveling direction, and the soil can be gradually moved into the rut along the traveling direction. That is, when the working speed is low, the front projected area of the second earth moving body 43 which is the earth moving body is increased, and when the speed is high, the front projected area is decreased.

[0074] The earth moving body (the second earth moving body 43) in the third embodiment is effective when the viscosity of the soil is low due to the soil quality and the water content. In the case of soil with low viscosity, although the rut is formed by the traveling machine body, the soil moves into the formed rut groove due to the weight of the soil itself and the flow of water. For this reason, the amount of soil pushed aside to the side of the rut is small, and the rut does not become deep. At low speed, which is the first speed, since the viscosity of the soil is low and the soil movement efficiency often deteriorates, the vehicle turns to increase the front projected area to actively ensure the amount of soil movement. Conversely, when the soil is vigorously moved toward the rut at high speed, which is the second speed, since the soil is in a highly fluid state, the moved soil may cross over the rut. To avoid this, at high speed, the vehicle turns to reduce the front projected area and turns the soil gathering body (the second soil gathering body 43) so that the flow of the moving soil follows the traveling direction, thereby preventing the soil from crossing over the rut. That is, the soil gathering body in the third embodiment can effectively move the soil into the rut and level the soil.

[0075] In the fourth embodiment, the plan view of which is shown in FIG. 20, the elastic member 71 is a tension spring. The elastic member 71 biases the second soil gathering body 43, which is a soil gathering body pivotable about the pivot axis A, in one pivoting direction. In the fourth embodiment, the elastic member 71 acts as a tension spring that pulls the end of the second soil gathering body 43 on the rut side forward in a direction away from the front end of the cover body 4.

[0076] In the fourth embodiment, two of the left-right relative position adjustment holes 431, which are on the side of the second soil gathering body 43 away from the cover body 4 on the right side shown in FIG. 20, are used. Therefore, the pivot axis A of the second soil gathering body 43 is attached to the side of the second soil gathering body 43 away from the cover body 4 on the right side shown in FIG. 20. When viewed from the surface of the second soil gathering body 43 where the soil moves, the relative attachment position relationship between the second soil gathering body 43 and the pivot axis A is such that the pivot axis A is arranged at a position shifted laterally from the center while avoiding the middle of the second soil gathering body 43. In a plan view, the middle of the soil movement surface of the second soil gathering body 43 corresponds to the middle of the four holes of the relative position adjustment holes 431.

[0077] Therefore, when viewed from the surface where the soil of the second soil-accumulating body 43 moves, the area on the left side of the fulcrum pipe 61, which serves as the substantial fulcrum axis A, closer to the cover body 4 is larger than the area on the right side of the fulcrum pipe 61 in the drawing, which is the area on the side away from the cover body 4. Therefore, the second soil-accumulating body 43 receives more soil pressure on the left side in the drawing with a larger area. When the soil collides with the second soil-accumulating body 43 as the scraping working machine 1 advances, due to the impact force, with the pivot axis A as the rotation center, the second soil-accumulating body 43 rotates clockwise and rotates to the right. That is, the inclination angle of the second soil-accumulating body 43 in plan view rotates from one side where it lies in a posture falling in a direction parallel to the cover body 4 shown by the solid line in Fig. 20 to the other side where it stands in a posture perpendicular to the front end of the cover body 4 shown by the two-dot chain line and faces forward. In the fourth embodiment, other configurations are the same as those in the second and third embodiments.

[0078] As the advancing speed increases, the force of the soil colliding with the soil-accumulating body (the second soil-accumulating body 43) also increases. The impact force becomes the force that rotates the soil-accumulating body (the second soil-accumulating body 43) to the other side around the pivot axis A. When this rotational force to the other side becomes larger than the biasing force of the elastic member 71 that biases to one side, the rotation of the second soil-accumulating body 43 is started. In the fourth embodiment, the second soil-accumulating body 43 rotates clockwise and rotates to the right.

[0079] Conversely, when the advancing speed decreases, the force of the soil collision also decreases. Therefore, due to the biasing force of the elastic member 71 that biases to one side, the soil-accumulating body (the second soil-accumulating body 43) rotates so as to return to its original position on one side. In the third embodiment, with the pivot axis A as the rotation center, the second soil-accumulating body 43 rotates counterclockwise and rotates to the left. As shown in Fig. 20, which is an enlarged plan view of the soil-accumulating body of the scraping working machine according to the fourth embodiment of the present invention, the portion of the second soil-accumulating body 43 and the regulating body 64, which is a regulating portion, drawn with a solid line indicates the low-speed state (before rotation), and the portion drawn with a two-dot chain line indicates the high-speed state (after rotation).

[0080] Since the turning of the earth moving body (the second earth moving body 43) is limited in the range that can be turned by the restricting body, it is possible to prevent the earth moving body (the second earth moving body 43) from continuing to turn. Therefore, since the moving direction of the soil can be continuously directed toward the rut, the trace erasing work can be carried out without interruption.

[0081] Since the elastic member 71 is constantly biased in one turning direction, when the impact of the soil disappears, it can return to its original position. Further, by appropriately adjusting the attachment position, the material, the form, etc. of the elastic member 71, the biasing force can be adjusted, and the adjustment with the impact addition and subtraction of the soil can be performed.

[0082] In the fourth embodiment, when the working speed shifts from low speed to high speed by changing the relative positional relationship between the earth moving body and the turning axis A, and by changing the type of the elastic member 71 and the positional relationship of its arrangement, the front projected area can be gradually shifted from a large area to a small area. Since the action and its effect generated by the earth moving body in the fourth embodiment are the same as those in the third embodiment, the description thereof is omitted.

[0083] In the fourth embodiment, in plan view, the second earth moving body 43, which is an earth moving body located on the side portion of the rut, the turning axis A for turning the earth moving body, and subsequently the elastic member 71 are arranged toward the width direction of the traveling direction from the rut to be filled. On the other hand, in the second and third embodiments, the second earth moving body 43 located on the side portion of the rut, and subsequently the elastic member 71 are arranged, and then the turning axis A is arranged. In the fourth embodiment, the elastic member 71 is arranged at a position far from the rut. Further, the fulcrum pipe 61, which is the turning axis A, is located between the elastic member 71 and the rut. Therefore, it is difficult for the mud splash that may occur from the rut during backfilling to reach the elastic member 71, and since the elastic member 71 is arranged in the shadow of the fulcrum pipe 61 from the rut, it is possible to suppress the direct application of the mud splash.

[0084] In the second, third, and fourth embodiments, by selecting the attachment position of the turning axis A to the second earth moving body 43 from the left - right relative position adjustment holes 431 with respect to the fulcrum pipe, the areas on both sides of the earth moving body 43 sandwiching the turning axis A can be changed. In the second embodiment, the attachment of the fulcrum pipe 61 constituting the turning shaft A to the second soil retaining body 43 uses two on the tip side of the proximal end side close to the cover body 4 of the second soil retaining body 43 on the left side shown in Fig. 18 among the holes 431 for adjusting the left-right relative position with the fulcrum pipe 61.

[0085] In the third embodiment, the attachment of the fulcrum pipe 61 constituting the turning shaft A to the second soil retaining body 43 uses two on the end side away from the cover body 4L of the second soil retaining body 43 on the right side shown in Fig. 19 among the holes 431 for adjusting the left-right relative position with the fulcrum pipe.

[0086] In the fourth embodiment, the attachment of the fulcrum pipe 61 constituting the turning shaft A to the second soil retaining body 43 uses two on the end side away from the cover body 4 of the second soil retaining body 43 on the right side shown in Fig. 20 among the holes 431 for adjusting the left-right relative position with the fulcrum pipe 61. By selecting the holes 431 for adjusting the left-right relative position between the fulcrum pipe 61 constituting the turning shaft A and the second soil retaining body 43, it is possible to select at which position of the second soil retaining body 43 the position of the turning shaft A is set, and the area from the turning shaft A in the second soil retaining body 43 and the area on the side away from the cover body 4 are changed. Therefore, when the second soil retaining body 43 is pressed in contact with the soil, it is adjusted which side of the surface has more soil pressure. Since the pressure increases on the side with more soil pressure, it becomes easier to be pushed, and the surface on the side that is in contact with the soil and receives a large amount of pressure rotates so as to approach the second soil retaining body 43 side. Therefore, the rotation direction can be selected according to where the turning shaft A is attached to the second soil retaining body 43.

[0087] In this embodiment, four holes 431 for adjusting the left-right relative position with the fulcrum pipe are provided and two are used each to fix the second soil retaining body 43 and the turning shaft A. However, if the number is further increased, it is possible to further change the moving distance and moving speed.

[0088] In the second, third, and fourth embodiments, the mechanism of the invention is incorporated into the second soil-accumulating body 43, but it may be incorporated into the other first soil-accumulating body 42 and third soil-accumulating body 44. Also, the soil-accumulating body (the second soil-accumulating body 43) in the second and third embodiments may be provided on the left extension working body 11L or the right extension working body 11R, which are side working bodies other than the central working body 11. Moreover, it may be provided on a working body composed only of the central working body 11 (a working machine without a so-called folding mechanism).

Explanation of Reference Numerals

[0089] 1 Scratching working machine (traveling body) 3 Soil crushing part 32 Cultivating claws 43 Second soil-accumulating body (soil-accumulating body) 431 Hole for adjusting the left-right relative position with the fulcrum pipe (mounting position) 64 Restraining body 71 Elastic member A Swivel shaft

Claims

1. A soil crushing part located behind the traveling body, which rotationally drives tilling claws as the traveling body moves forward to crush soil; A soil gathering body disposed behind the traveling direction of the traveling body and in front of the traveling direction of the soil crushing part, capable of moving soil on the traveling track formed by the traveling body to erase the traveling track; The soil gathering body is configured to be able to change the front projected area according to the moving speed, and has a turning shaft that can rotate the soil gathering body in the horizontal direction; Changing the area of each surface in contact with the soil on both sides of the soil gathering body across the turning shaft; When the working speed is low, reducing the front projected area of the second soil gathering body which is the soil gathering body, and when the speed is high, increasing the front projected area; A rotary tilling machine characterized by the above.

2. The soil gathering body includes a first soil gathering body and a second soil gathering body disposed opposite to each other with one traveling track in between; The turning shaft is provided on the first soil gathering body or the second soil gathering body; The rotary tilling machine according to claim 1, characterized by the above.

3. The turning shaft is provided on a third soil gathering body which is disposed outside the second soil gathering body with respect to the first soil gathering body and the traveling track among the soil gathering bodies composed of the first soil gathering body and the second soil gathering body disposed opposite to each other with one traveling track in between; The rotary tilling machine according to claim 1, characterized by the above.

4. The soil gathering body includes a third soil gathering body disposed outside the second soil gathering body with respect to the traveling track; The turning shaft is provided on the third soil gathering body; The rotary tilling machine according to claim 1, characterized by the above.

5. The turning shaft is provided on at least any one of the first soil gathering body and the second soil gathering body disposed opposite to each other with one traveling track in between, and the third soil gathering body disposed outside the second soil gathering body with respect to the traveling track among the soil gathering bodies; The rotary tilling machine according to claim 1, characterized by the above.

6. The turning shaft is provided on all of the first soil gathering body, the second soil gathering body, and the third soil gathering body; The rotary tilling machine according to claim 1, characterized by the above.

7. When the working speed is low, it is about 1 - 3 km / h; The rotary tilling machine according to claim 1, characterized by the above.

8. When the working speed is high, it is about 3 - 6 km / h; The rotary tilling machine according to claim 1, characterized by the above.

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