JP7220919B2 - Puddling machine - Google Patents

Description

The present invention relates to a puddling machine mounted on a tractor. In particular, the present invention relates to a cover that guides mud to a plowing section and restricts the mud from jumping out of the plowing section.

BACKGROUND ART Patent documents 1 and 2 disclose an agricultural working machine that is attached to a traveling body such as a tractor, has a crushing section or a plowing section, and a leveling body, and is used for plowing and plowing work in fields and paddy fields. The work machine described in Patent Document 1 is regulated by a side cover that protrudes forward from the cover of the tillage rotor in order to prevent mud and muddy water from flowing out laterally outward from the tillage section during puddling. there is The work machine described in Patent Document 2 includes a guard body that guides soil toward the tilling body in order to suppress residual tillage by the chain case portion.

JP 2008-125381 A Japanese Patent Application Laid-Open No. 2016-2061

Since the side cover provided in the work machine described in Patent Document 1 is flat, it is possible to restrict the mudflow generated in the plowing section or crushed soil section from spreading outward up to the front end of the side cover. However, there is room for improvement because the mudflow that has passed over the front end of the side cover tends to flow outside the side cover.
The guard body of the work machine described in Patent Document 2 is said to guide soil by a guide front plate portion arranged from the front end to the rear side of the guard body. However, when a large lump of earth exists, it is difficult to move the whole lump of earth with the guide front plate.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a puddling machine capable of arranging the mud flow generated in the soil crushing section and smoothly guiding a lump of soil to the soil crushing section.

In order to achieve the above object, one aspect of the present invention provides a frame that can be attached to a traveling machine body, a crushed earth section that is supported by the frame and can be driven to rotate, and a crushed earth section that supports the crushed earth section and covers the sides of the crushed earth section. and a mudguard plate attached to the side cover and protruding forward from the side cover, the mudguard plate having a first surface parallel to the side cover ; A second surface formed continuously so as to rise from the front end of the first surface to the first surface, and a width direction formed continuously from the rear end of the second surface and progressing from the rear end of the second surface. A third surface that is bent outward to form an acute angle with the second surface , and a surface that connects the tip of the third surface that is bent outward from the rear end of the third surface and is continuous from the third surface The puddling machine is provided with a fourth surface formed parallel to the first surface and attached to the side cover, and a fourth surface forming an acute angle with the third surface. .

ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide a puddling machine capable of adjusting a mudflow generated in a soil crushing section and smoothly guiding a lump of soil to the soil crushing section.

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view seen from the front side of the advancing direction of the puddling work machine which shows embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a top view of the puddling work machine which shows embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the puddling work machine which shows embodiment. It is a top view which expands the mud gathering body which is the principal part of an embodiment, and explains the flow of mud. It is a side cross-sectional view for explaining the flow of mud by cross-sectioning the mud gathering body, which is the main part of the embodiment.

An embodiment of the present invention will be described with reference to the drawings. In the description, the left side shown in FIG. 1 is the front side with respect to the traveling direction, the right side is the rear side with respect to the traveling direction, the lower side is the left side with respect to the traveling direction, and the upper side is the right side with respect to the traveling direction. Moreover, the left side shown in FIG. 3 is described as the front side in the direction of travel, and the right side as the rear side in the direction of travel. Also, the left side shown in FIGS. 4 and 5 will be described as the rear side with respect to the traveling direction, and the right side as the front side with respect to the traveling direction. In the description of the drawings, the same or similar parts may be denoted by the same or similar reference numerals, and descriptions thereof may be omitted. In addition, the drawings used for explanation are schematic, and the relationship with the dimensions of each part may differ from the actual one. Moreover, the technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

An outline of the puddling machine 1 will be described. The puddling machine 1 is attached to a three-point link mechanism, which is an elevating link provided at the rear of a tractor (not shown) which is a traveling body, and is used for soil crushing work and puddling work. The puddling machine 1 is provided with a frame 2 having a mounting part 20, and the puddling machine 1 can be moved up and down by connecting the mounting part 20 and a three-point link mechanism. Further, the puddling machine 1 obtains power output from the tractor to rotationally drive the soil crushing unit 3 positioned below the frame 2 . This earth crushing unit 3 has a plurality of claws 32 on a rotor shaft 31 that rotates on a horizontal axis perpendicular to the advancing direction. By rotating the claws 32 as the tractor advances, the soil can be crushed.

A cover body 4 is provided above the crushed earth part 3 to cover the upper part of the crushed earth part 3 to prevent the soil from scattering to the surroundings during earth crushing. A ground leveling body 5 is provided at the rear end of the cover body 4 so as to be vertically rotatable. After the soil is leveled, the puddling work is carried out. Further, the ground leveling body 5 is composed of a first ground leveling body 51 that rotates up and down at the rear end of the cover body 4 and a second ground leveling body 56 that rotates up and down at the rear end of the first ground leveling body 51 . It is The first leveling body 51 and the second leveling body 56 cooperate with each other to evenly level the soil and mud after the soil has been crushed by the earth crushing unit 3 .

The puddling machine 1 to be described includes a central working body 11 and extended working bodies 11L and 11R connected to both ends of the central working body 11. As shown in FIG. The extension working bodies 11L and 11R can be transformed into working states and retracted states by rotating around fulcrum portions 25 provided at both ends of the frame 2 provided in the central working body 11. be. In the description, the working state is described as a working state in which the working width is expanded by deploying the extended working bodies 11L and 11R so as to extend the working width of the central working body 11. FIG.

A mud gathering body 6 of the present invention is arranged outside the extension working bodies 11L and 11R. The front end of the mud gathering body 6 is positioned forward of the crushed earth part 3 and the cover body 4, and guides the mud relatively flowing from the front to the center side in the width direction with respect to the traveling direction as the puddling machine 1 advances. . In addition, among the mudflows generated in the crushed earth section 3, the mudflows flowing forward can be guided to the center side in the width direction with respect to the traveling direction.

Now, the details of the puddling machine 1 will be explained. The frame 2 is a part forming the skeleton of the central working body 11 of the puddling machine 1, and includes a mounting portion 20, an input case 21, a pipe frame 22, a transmission case 23, and a support frame 24.

The mounting portion 20 is provided at the front central portion of the puddling machine 1 and is composed of a top link pin 201 at the center of the upper portion and a pair of lower link pins 202 positioned below and to the left and right of the top link pin 201 . By connecting the top link pin 201 and the lower link pin 202 to a three-point link mechanism (not shown) on the tractor side, the puddling machine 1 is attached to the tractor so that it can move up and down. An input case 21 is provided in the center of the mounting portion 20, and an input shaft 211 protrudes forward. The input shaft 211 is connected to the PTO shaft of the tractor through a universal joint (not shown) or the like to acquire rotational power output from the tractor. A top mast 212 projects forward and upward from the upper portion of the input case 21, and the top link pin 201 is provided at the upper end of the top mast 212. As shown in FIG. A lower plate 213 is arranged downward from the side of the input case 21 , and a lower link pin 202 is attached to the lower plate 213 .

The input case 21 is provided with a pipe frame 22 having one end connected to the input case 21 and projecting to the left and right sides. The pipe frames 22 arranged on the left and right sides are made of round pipes and arranged coaxially. At the other end of either the left or right side of the pipe frame 22, a vertically long transmission case 23 extending downward is provided, and the other end of the pipe frame 22 on the other side extends downward. A vertically elongated support frame 24 is positioned. A crushed earth part 3 is provided under the frame 2 so as to bridge the lower end parts of the transmission case 23 and the support frame 24, respectively.

The crushed earth section 3 is a member having a rotor shaft 31 and claws 32 and is supported under the pipe frame 22 between the lower end of the transmission case 23 and the lower end of the support frame 24 . The rotor shaft 31 is a rotatable shaft mounted under the transmission case 23 and the support frame 24 . A large number of claws 32 are radially attached to the rotor shaft 31 at regular intervals in the circumferential and axial directions. The rotor shaft 31 and the claws 32 are integrated to constitute the earth crushing section 3 . The earth crushing unit 3 acquires rotational power output from the tractor at the input shaft 211 and is transmitted to the rotor shaft 31 through the input case 21 and the transmission case 23 to be rotationally driven. This rotary drive crushes the soil.

The crushed earth unit 3 receives power input from the input shaft 211 and is rotationally driven. The power input from the input shaft 211 is decelerated by the gears inside the input case 211, and passes through the pipe frame 22 (the left side in the traveling direction in FIGS. 1 and 3) projecting laterally on one of the left and right sides. It is transmitted into the transmission case 23 by an output shaft (not shown). By arranging transmission members (not shown) such as chains and sprockets in the transmission case 23, the power of the tractor is transmitted to the crushed earth section 3, and the crushed earth section 3 is rotationally driven.

A cover body 4 is provided on the upper part of the crushed earth part 3 so as to be along with the rotating outer circumference of the claw 32 and to be spaced apart. The cover body 4 has left and right side ends attached to the transmission case 23 and the support frame 24 . By covering the upper portion of the crushed earth section 3 with the cover body 4 in this way, the tilled soil scattered from the crushed earth section 3 side is prevented from scattering upward.

Here, the extension working bodies 11L and 11R for extending the body width of the puddling machine 1 will be described. At both left and right ends of the cover body 4 and the soil crushing section 3 of the central working body 11, members similar to those of the cover body 4 and the soil crushing section 3 of the central working body 11 are provided as extended working bodies 11L and 11R. A left cover body 4L and a left crushed soil section 3L, which are extension working bodies 11L positioned on the left side in the direction of travel, and a right cover body 4R, which is the extension work body 11R positioned on the right side in the direction of travel and working, and a right A crushed earth section 3R is arranged respectively. The left extension work body 11L and the right extension work body 11R have mutually symmetrical structures.

The extended crushed earth parts 3L and 3R in the working state with the body width expanded are located on the same straight line on the left side of the traveling direction of the crushed earth part 3 located in the center in the working state. The extended crushed earth parts 3L, 3R have extension side rotor shafts 31L, 31R and claws 32, like the crushed earth part 3 of the central working body. Claws 32 are radially arranged on the rotor shafts 31L and 31R at regular intervals in the axial direction, and soil crushing work can be performed by obtaining rotational power. Acquisition of power is obtained through a dog clutch arranged at the end of the crushing section 3 of the central working body 11 . Alternatively, the power is transmitted from the transmission shaft transmitted from the input case 21 of the central working body 11 to side transmission cases (not shown) provided on the extended working bodies 11L and 11R.

Extension cover bodies 4L and 4R are provided to cover the upper and lateral sides of the extended crushed soil sections 3L and 3R. Side covers 42L and 42R are provided on the left and right sides of the extended cover bodies 4L and 4R, respectively. Both ends of the crushed earth extensions 3L and 3R are supported by bearings installed in the side covers 42L and 42R, and the crushed earth extensions 3L and 3R are rotatable between the side covers 42L and 42R. is. The side covers 42L and 42R are plate-like members, and the plate surfaces face in a direction that is parallel to the axial direction of the extension side rotor shafts 31L and 31R provided in the extension crushed earth sections 3L and 3R and that intersects the traveling direction. The extension cover bodies 4L, 4R and the side covers 42L, 42R provided therein prevent mud and soil generated from the extension crushed earth parts 3L, 3R from scattering upward and in the width direction with respect to the traveling direction.

Support point frames 41L and 41R are provided near the extension cover bodies 4L and 4R. The side portions of the fulcrum frames 41L and 41R closer to the central working body 11 are provided with protruding portions that protrude upward, and the protruding portions are connected to the fulcrum portions 25 . The fulcrum frames 41L, 41R are integrated with the extended crushed earth parts 3L, 3R, the extended cover bodies 4L, 4R, and the side covers 42L, 42R, and rotate upward about the fulcrum part 25. Thus, the extension working bodies 11L and 11R can be switched between the working state and the retracted state.

A mud gathering body 6 is provided on each of the side covers 42L, 42R outside in the width direction with respect to the traveling direction of the extended cover bodies 4L, 4R. Since the side cover 42L of the left extension work body 11L and the side cover 42R of the right extension work body 11R have symmetrical shapes, only the left extension work body 11L is shown in the description. Description will be made with reference to FIGS. 4 and 5, and description of the mud gathering body 6 arranged on the right extended working body 11R side will be omitted.

FIG. 4 is an explanatory plan view of the outer portion of the left extension working body 4L in the width direction with respect to the traveling direction. FIG. 5 is a cross-sectional view of the extension working body 4L in the advancing direction. As shown in FIG. 5, the mud shuffler 6 is a member elongated in the front-rear direction, and the front end thereof protrudes forward from the rotation area of the extended crushed earth section 3L and the side cover 42L. Moreover, the vertical width of the mud gathering body 6 is set so as to be within the radius of rotation, and the lower end side of the mud gathering body 6 is sunk in the mud to perform the work.

The mud gathering body 6 guides the mud relatively moving from the front of the side cover 42L along with the advance of the puddling machine 1 to the extended crushed earth section 3L to form a mud flow F1. Further, the clod C1 mixed with the mud is divided, and the clod C2 after division is guided to the extended crushed earth section 3L.
Furthermore, when mud and a lump of earth are crushed by the extension crushing part 3L, the mud may be agitated by the tillage tines 32 and a mud flow may occur. A portion of this mudflow collides with the inner surface of the side cover 42L and may flow backward along the surface of the side cover 42L. This backflow mud flow F2 can be again guided to the extended crushed earth section 3L.

These mud and lumps of earth are guided to the extended crushed soil portion 3L by the first surface 61, second surface 62, third surface 63, and fourth surface 64 of the mud shuffler 6. As shown in FIG. The first surface 61 and the second surface 62 guide mud relatively moving from the front to the crushed earth unit 3 as a mudflow F1, and the third surface 63 and the fourth surface 64 guide the mudflow F2 to the crushed earth unit 3. Guide to again. The fourth surface 64 is also an attachment surface for attaching the mud gathering body 6 to the side cover 42L.

The first surface 61 is arranged parallel to the side cover 42L and faces in a direction orthogonal to the traveling direction. The first surface 61 is plate-shaped and has a front end 61a projecting forward. The front end 61a is located forward of the rotation area of the extended crushed earth section 3L and the front end of the side cover 42L. The front end 61a can divide the mud and the lump of earth C1 that move relatively as it advances. In addition, the divided soil mass C2 is guided inward from the first surface 61 together with the mud flow F1 formed by the mud that is also divided at the front end.

Moreover, since the first surface 61 protrudes in the front-rear direction to form a wide surface up to the front end 61a, the front end 61a can be deeply inserted into the lump C1, and the lump C1 can be easily divided. Further, the front end 61a is formed so as to extend from the front to the rear as it goes from the top to the bottom. The clod C1 that collides with the front end 61a is divided while facing downward so as to be pushed into the front end 61a.

Further, the front end 61a is provided with a stepped stepped portion 61b that recedes from the top toward the bottom. The stepped portion 61b is located obliquely behind the position of the driver (not shown) who gets on the traveling machine body, and can be visually confirmed by the driver. The plowing depth of the crushed soil unit 3 can be confirmed by the degree of infiltration of the stepped portion 61b. Since the stepped portion 61b has a stepped shape, it is easy to visually recognize as a stepwise degree of infiltration, and it is easy to judge the degree of plowing depth of the crushed earth section 3 easily. In addition, since they are arranged outside the left and right extended working bodies 11L and 11R, the inclination of the puddling machine 1 with respect to the working surface can be easily visually confirmed.

A second surface 62 is formed at a position behind the front end 61 a of the first surface 61 . The second surface 62 is formed continuously so as to rise from the position behind the front end 61 a of the first surface 61 with respect to the first surface 61 . A rear end portion 62a of the second surface 62 forms a surface that faces toward the center of the extended crushed earth portion 3L in the traveling direction as it goes rearward.

The mudflow F 1 and the mass of soil C 2 separated by the first surface 61 reach the second surface 62 after moving rearward along the first surface 61 . After that, the mudflow F1 and the lump of earth C2 move along the second surface 62 toward the center of the extended crushed earth section 3L in the traveling direction. The mudflow F1 and the mass of soil C2 that have reached the rear end portion 62a of the second surface 62 move away from the second surface 62 with the force of the mudflow F1, but continue to extend the second surface 62 rearward. Moving.

As shown in FIGS. 4 and 5, the second surface 62 is positioned forward of the extended crushed earth section 3L and the side cover 42L, and the rear end 62a of the second surface 62 is positioned inside the side cover 42L. I am letting Therefore, the mudflow F1 and the lump C2 are appropriately guided toward the extended soil crushing section 3L side without excessively increasing the running resistance of the second surface 62 inclined with respect to the traveling direction as the puddling machine 1 advances. can do. In the case of the embodiment, the rear end portion 62a of the second surface 62 in plan view is located inside the tillage tines 32 adjacent to the inner side of the side cover 42L in the direction of movement. The rear end portion 62a may reach the outside. In this case, the frictional resistance of the second surface 62 against the mud flow F2 can be reduced, so that the working resistance of the puddling machine 1 can be reduced.

Furthermore, the direction of the 2nd surface 62 is arrange|positioned toward the downward direction. Therefore, the second surface 62 faces forward, to the left and right central sides with respect to the traveling direction, and downward. As shown in FIG. 5, since the second surface 62 is arranged downward, it moves along the slope of the second surface and then forms a mudflow F1 that sinks into the work surface G. there is In FIGS. 4 and 5, among the arrows indicating the mudflow F1, the broken line indicates the mudflow F1 below the working surface G. As shown in FIG. The mudflow F1 and the lump of earth C2 can sink into the work surface G, leave the rear end portion 62a of the second surface 62, and head toward the central side of the extended crushed soil portion 3L.

The mud flow F1 and the lump of earth C2 separated from the second surface 62 reach the extended soil crushing section 3L and are finely crushed by the tillage tines 32 that are rotationally driven. Although the mud that has passed through the extended crushed earth section 3L moves backward, part of it may not move backward enough to form a mudflow F2, which is a reverse flow that moves sideways.

As shown in FIG. 4, the mudflow F2 moves forward along the side cover 42L. The outer surface of the side cover 42L is in contact with the fourth surface, which is the mounting surface of the mud gathering body 6. As shown in FIG. The fourth surface 64 is located inside the first surface 61 in the width direction, and is arranged so as to partially extend the surface of the side cover 42L forward. The mudflow F2 moves forward along the fourth surface 64 after moving from the front end of the side cover 42L to the fourth surface 64 . The fourth surface 64 allows the mudflow F2 to move forward without leaking outside the side cover 42L.

The mudflow F2 that has moved forward along the fourth surface 64 moves toward the third surface 63 . The third surface 63 is formed by bending the rear end of the second surface 62 outward with respect to the traveling width direction, and connecting the bent end to the fourth surface 64 . Also, the connection point with the fourth surface is located forward of the rear end portion 62a of the second surface 62, and the angle sandwiched between the second surface 62 and the third surface 63 is an acute angle. . The angle between the third surface 63 and the fourth surface 64 is also acute. Explaining along the flow of the mudflow F2, the third surface 63 is provided continuously from the front side of the fourth surface 64 so as to be bent inward and rearward in the traveling direction, and the front end portion of the third surface 63 It can also be said that the second surface 62 is connected to the rear end portion 62a. That is, the first surface 61, the second surface 62, the third surface 63, and the fourth surface 64 of the mud gathering body 6 are connected to each other.

Due to the arrangement of the third surface 63, the mudflow F2 is bent inward and backward in the traveling direction. For this reason, the mudflow F2, which is a reverse flow generated from the extended crushed earth section 3L, is again directed to the front center side of the extended crushed earth section 3L. Mud and the like carried by the mudflow F2 merges with the mudflow F1, goes to the extension crushed earth section 3L, and is again crushed by the extension crushed earth section 3L.

Furthermore, the direction of the third surface 63 is inclined upward. The third surface 63 faces upward toward the side cover 42L. Therefore, the mudflow F2 that has moved from the fourth surface 64 to the third surface 63 runs up the third surface 63 and reaches the vicinity of the rear end portion 62a of the second surface 62 . After that, the mudflow F2 leaves the third surface 63 due to the force of the flow, and moves so as to extend the third surface 63 rearward and upward.

The mudflow F2 can join from above so as to follow the flow of the mudflow F1 moving along the second surface and submerged in the work surface G. The mudflow F2 can smoothly join the mudflow F1 without obstructing the flow of the fast mudflow F1 moving near the second surface 62 . Since the mudflow F2 does not interfere with the fast-flowing mudflow F1, the mudflow F2 and the mudflow F1 do not interfere with each other, and can smoothly move toward the extended crushed earth section 3L.

A ground leveling body 5 is provided at the rear end of the cover body 4 so as to hang down rearward and downward. Similarly, the ground leveling members 5L and 5R are provided so as to hang backward and downward from the rear ends of the cover members 4L and 4R of the left and right extended working members 11L and 11R. The ground leveling bodies 5L and 5R are attached to the cover bodies 4L and 4R, respectively. Together with 3R, it rotates around the fulcrum.

The ground leveling body 5 includes a first ground leveling body 51 and a second ground leveling body 56 . The left and right ground leveling bodies 5L and 5R are similarly provided with first ground leveling bodies 51L, 51R and second ground leveling bodies 56L, 56R. The first ground leveling member 51 has a plate 511 whose left and right widths are set to approximately the same width as the cover member 4, and is curved and bent in an S shape as shown in FIG. The first leveling body 51 is vertically rotatable by a plurality of hinges 52 arranged at the front end or upper end. The rotation fulcrum axis of the hinge 52 is directed left and right in the traveling direction and is parallel to the axis of the rotor shaft 31 . Therefore, the lower side of the first ground leveling body 51 can be rotated away from or closer to the rotational diameter of the claw 32 .

Since the first leveling body 51 is arranged so as to cover the rear of the crushed earth section 3, it prevents the soil crushed by the crushed earth section 3 from scattering backward. In addition, the first leveling body 51 during the earth-breaking work rotates up and down to bring the surfaces of the first leveling bodies 51, 51L, and 51R on the side of the earth-breaking section 3 to the ground, so that the earth-breaking section 3 and the extended earth-breaking section 3L , level the soil after crushing with 3R.

Second leveling bodies 56, 56L, 56R are attached to the rear ends of the first leveling bodies 51, 51L, 51R so as to be vertically rotatable. The second ground leveling body 56 is a member elongated in the width direction with respect to the direction of travel, and a rotation fulcrum 562 is attached to the fulcrum shaft 512 at the rear end portion of the first ground leveling body 51 so as to be vertically rotatable. During the puddling work, the second leveling body 56, which is in a substantially horizontal state, contacts the crushed soil surface after passing the first leveling body 51 and presses it by its own weight, so that the first leveling body 51 sufficiently levels and The crushed soil surface that could not be leveled is leveled with even higher precision, and the surface after leveling is leveled.

The puddling machine 1 configured as described above is provided with the mud shufflers 6 on the side covers 42L and 42R, thereby smoothing out the mud flow F2 generated in the crushed soil and relatively moving from the front to the rear. It is possible to provide a puddling machine capable of smoothly guiding a lump of soil to a crushing section.

Although the first to fourth surfaces are described as flat surfaces in the embodiments, at least a part of each surface may have a curved surface. In addition, although the mud shuffler 6 has been described as being disposed on the side covers 42L and 42R of the extended crushed soil sections 3L and 3R, it is provided on the side cover (not shown) of the cover body of the central working body 11. good too. Further, although the second surface 62 and the third surface 63 have been described as being inclined upward or downward, they may be directed horizontally instead of being vertically inclined. Further, although the puddling machine has been described as having the extended working bodies 11L and 11R, the puddling machine comprising only the central working body 11 may be provided with the scraping body 6. FIG.

Although the present invention has been described by the above embodiments, the statements and drawings forming part of this disclosure should not be understood to limit the present invention. It goes without saying that modifications to the embodiments, examples, and operational techniques based on this disclosure are possible within the scope of the claims.

1 raking machine 2 frame 3 crushed earth section 4 cover body 42L side cover 42R side cover 6 mud gathering body 61 first surface 61a front end 61b stepped portion 62 second surface 62a rear end portion 63 third surface 64 fourth surface F1 Mudflow F2 Mudflow C1 Soil mass C2 Soil mass G Working surface 5 Leveling body 51 First leveling body 56 Second leveling body

Claims (5)

A frame that can be attached to a running machine,
a crushed earth section supported by the frame and rotatable;
a side cover that supports the crushed earth part and covers the side part of the crushed earth part;
a mud collector attached to the side cover and protruding forward from the side cover;
a first surface of the mud shovel disposed parallel to the side cover and formed with a surface facing in a direction perpendicular to the traveling direction;
a second surface formed continuously so as to stand up from the front end of the first surface to the first surface from behind;
a third surface formed continuously from the rear end of the second surface, bent outward in the width direction proceeding from the rear end of the second surface, and forming an acute angle between the second surface and the second surface; ,
A surface connected to the outside of the third surface and formed continuously from the third surface is arranged parallel to the first surface and attached to the side cover, and the third surface is attached to the side cover. a fourth surface forming an acute angle with the surface;
A puddling machine characterized by comprising: the rear end of the second surface is located inside the side cover;
The puddling machine according to claim 1, characterized in that: The front end portion of the first surface has a stepped portion provided so as to recede rearward as it goes downward from above;
The puddling machine according to claim 1 or 2, characterized by comprising: The surface facing forward in the traveling direction of the second surface is arranged facing downward.
The puddling machine according to any one of claims 1 to 3, characterized in that: The surface of the third surface facing backward in the direction of travel is arranged facing upward,
A puddling machine according to any one of claims 1 to 4, characterized in that:

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