Ridge-forming body and ridge-forming machine

Abstract

To provide a levee forming body capable of improving durability.SOLUTION: The levee forming body 4 of the levee plastering machine 1 is equipped with a plurality of levee side surface forming plates 42 and a plurality of levee upper surface forming plates 43, and the levee upper surface forming plate 43 has a plate thickness changing part 63 and a plate thickness constant part 64. In addition, with respect to both ridge top surface forming plates 43 adjacent to each other in the rotation direction among the plurality of ridge top surface forming plates 43 positioned side by side in the rotation direction, the outer surface of the plate thickness changing portion 63 of the ridge top surface forming plate 43 on the rear side in the rotation direction is exposed, but the outer surface of the constant plate thickness portion 64 of the ridge top surface forming plate 43 is covered by the plate thickness changing portion 63 of the ridge top surface forming plate 43 on the front side in the rotation direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a ridge forming body and a ridge painting machine capable of improving durability.

Background Art

[0002] Conventionally, for example, a ridge painting machine described in Patent Document 1 below is known.

[0003] This conventional ridge painting machine includes a machine body connected to a traveling vehicle such as a tractor, a soil-receiving body provided on the machine body, and a ridge forming body provided on the machine body. The ridge forming body includes a rotating body that rotates in a predetermined direction, a plurality of ridge side forming plates provided on the rotating body, and a plurality of ridge upper forming plates provided on the rotating body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above conventional ridge painting machine, since the plate thickness dimensions of the ridge forming plates (for example, ridge side forming plates, ridge upper forming plates, etc.) are the same throughout, only the portion on the rear side in the rotation direction is likely to wear first, and there is a risk that sufficient durability cannot be obtained.

[0006] The present invention has been made in view of such points, and an object thereof is to provide a ridge forming body and a ridge painting machine capable of improving durability.

Means for Solving the Problems

[0007] The ridge-forming body according to the present invention comprises a rotating body that rotates in a predetermined direction, and a plurality of ridge-forming plates provided on the rotating body and positioned side by side in the direction of rotation. The plurality of ridge-forming plates have a curved plate thickness-changing portion whose plate thickness dimension changes, and a plate thickness-constant portion connected to the front end of the plate thickness-changing portion in the direction of rotation. The plate thickness-changing portion is formed in such a way that its plate thickness dimension gradually increases from the front end to the rear end in the direction of rotation. With respect to two adjacent ridge-forming plates in the direction of rotation, the outer surface of the plate thickness-changing portion of the ridge-forming plate located on the rear side in the direction of rotation is exposed, and the outer surface of the plate thickness-constant portion of the ridge-forming plate located on the rear side in the direction of rotation is covered by the plate thickness-changing portion of the ridge-forming plate located on the front side in the direction of rotation. [Effects of the Invention]

[0008] According to the present invention, durability can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a plan view of a ridge-forming machine according to one embodiment of the present invention. [Figure 2] This is a plan view of the ridge-forming body of the same ridge-forming machine. [Figure 3] This is a cross-sectional view of the ridge-forming body of the same ridge-forming machine. [Figure 4] This is a plan view (plan view before installation) of the ridge-forming plate of the same ridge-forming body. [Figure 5] This is a cross-sectional view of the ridge-forming plate of the ridge-forming body (cross-sectional view before installation). [Figure 6] Figure 4 shows the AA unfolded cross-sectional view (cross-sectional view of the state when unfolded into a planar shape). [Modes for carrying out the invention]

[0010] One embodiment of the present invention will be described with reference to Figures 1 to 6.

[0011] In Figure 1, 1 is a levee-forming machine, and this levee-forming machine 1 is an agricultural implement used by being attached to the rear of a tractor (not shown), which is a vehicle.

[0012] In other words, the levee plastering machine 1 is attached to the rear of the tractor and performs levee plastering work while moving forward as the tractor moves forward. The levee plastering machine 1 is, for example, a return type, and in the corners of the field, it switches from the forward operation state shown in Figure 1 to the reverse operation state and performs levee plastering work while moving backward as the tractor moves in reverse.

[0013] As shown in Figure 1, the levee building machine 1 comprises a machine body 2 connected to a three-point link at the rear of a tractor, an embankment body 3 provided on the machine body 2 that performs embankment work while rotating in a predetermined direction, a levee forming body 4 provided on the machine body 2 that performs levee formation work while rotating in a predetermined direction behind the embankment body 3, and a top surface scraping body 5 provided on the machine body 2 that performs levee top surface scraping work while rotating in a predetermined direction in front of the embankment body 3.

[0014] The machine body 2 includes a fixed machine frame 11 that is detachably connected to a three-point linkage at the rear of the tractor, a rotating arm 12 whose one end is rotatably connected to the fixed machine frame 11, and a movable machine frame 13 whose other end is rotatably connected to the rotating arm 12.

[0015] The embankment 3, the ridge-forming body 4, and the top-surface scraping body 5 are each mounted on the movable machine frame 13. These embankment 3, ridge-forming body 4, and top-surface scraping body 5 constitute the ridge-plastering work section 10.

[0016] The fixed machine frame 11 has a shaft holding portion 15, to which an input shaft (not shown) is rotatably mounted. The input shaft is connected to the PTO shaft of a tractor (not shown) via a joint. The movable machine frame 13 also functions as a transmission case housing the transmission means that transmits power from the input shaft to the ridge-forming work unit 10.

[0017] Incidentally, the ridging machine 1 includes a plurality of cylinders 16, 17 made of, for example, an electric hydraulic cylinder, and is selectively switched to a forward working state, a storage state, and a backward working state based on the operation of these cylinders 16, 17.

[0018] The soil raising body 3 has a rotating shaft 21 that is driven to rotate based on the power from the input shaft side, and soil raising claws 22 that are detachably attached to the rotating shaft 21 and cultivate the soil on the field surface and the ridge (original ridge) while being driven to rotate together with the rotating shaft 21, and raise the cultivated soil.

[0019] Similarly, the upper surface scraping body 5 has a rotating shaft 23 that is driven to rotate based on the power from the input shaft side, and cutting claws 24 that are detachably attached to the rotating shaft 23 and scrape the upper surface of the ridge (original ridge) while being driven to rotate together with the rotating shaft 23.

[0020] The soil raising body 3 is covered with a soil raising body cover 26, the upper surface scraping body 5 is covered with an upper surface scraping body cover 27, and the ridge forming body 4 is covered with a ridge forming body cover 28. Further, a gauge wheel 31 is provided on the movable machine frame 13, and a rotating shaft for driving the ridge forming body (a driving shaft to which the ridge forming body 4 is detachably attached) 33 that is driven to rotate based on the power from the input shaft side is rotatably provided on the shaft holding portion 32 of the movable machine frame 13.

[0021] As shown in FIGS. 1 to 3, the ridge forming body 4 is detachably attached to the rotating shaft 33 of the movable machine frame 13 of the machine body 2, and rotates (drives and rotates) in a predetermined direction about a rotation center axis (rotation center) X in the left-right horizontal direction together with the rotating shaft 33. The ridge forming body 4 includes a rotating body 41, a plurality of ridge side surface forming plates 42 provided on the rotating body 41 and compacting the soil raised by the soil raising body 3 while being driven to rotate together with the rotating body 41 to form an inclined ridge side surface, and a plurality of ridge upper surface forming plates (ridge forming plates) 43 provided on the rotating body 41 and compacting the soil raised by the soil raising body 3 while being driven to rotate together with the rotating body 41 to form a horizontal ridge upper surface and an arc-shaped ridge shoulder surface.

[0022] In other words, the ridge-forming body 4 shown in Figures 1 to 3 comprises, for example, a rotating body 41 which is a base body that rotates in a predetermined direction about a rotational axis X, eight identical metal ridge-side forming plates 42 fixed to the rotating body 41 so as to be aligned in the rotational direction, and eight identical synthetic resin ridge-top forming plates (elastically deformable elastic plates) 43 detachably provided on the rotating body 41 so as to be aligned in the rotational direction.

[0023] The rotating body 41 has a truncated conical first mounting portion 46 centered on the rotational axis X, and a cylindrical second mounting portion 47 provided on the reduced diameter end side of the first mounting portion 46, also centered on the rotational axis X. Multiple mounting holes 48 are formed in this second mounting portion 47. The ridge top surface forming plate 43 also has multiple mounting holes 49 corresponding to the mounting holes 48.

[0024] The ridge-forming plate 42 is fixed to the outer surface of the first mounting portion 46 of the rotating body 41 by welding or the like. On the other hand, the ridge-forming plate 43 is detachably attached to the outer surface (cylindrical surface) of the second mounting portion 47 of the rotating body 41 by a longitudinal mounting member (mounting device) 50.

[0025] In other words, the claw portion 51 of the mounting member 50 is removably inserted into the mounting hole 49 of the ridge top surface forming plate 43 and the mounting hole 48 of the second mounting portion 47, thereby attaching the ridge top surface forming plate 43 to the outer circumferential surface of the second mounting portion 47.

[0026] In this mounting state, the ridge-forming plate (elastic plate) 43 is slightly elastically deformed radially outward because a contact portion 52, which is part of its inner surface, comes into contact with the mounting member 50 (see Figure 3). Also, in this mounting state, the ridge-forming plate 43 pushes soil in from the rear side in the direction of rotation, and the distance from the rotational center axis X gradually increases as it moves from the front end to the rear end in the direction of rotation.

[0027] Here, as shown in Figures 4 to 6, the ridge top surface forming plate 43 is formed in a curved shape that is approximately rectangular in plan view, for example, by a single elastically deformable synthetic resin plate (wing plate). Note that the ridge top surface forming plate 43 shown in Figures 4 and 5 is in its state before attachment to the rotating body 41 (before elastic deformation). Also, Figure 6 is an unfolded cross-sectional view of AA in Figure 4, showing the AA portion of the ridge top surface forming plate 43 unfolded in a planar shape. However, in reality, the AA portion is not planar, but rather curved, with the distance from the rotational center axis X gradually increasing toward the larger diameter end of the ridge shoulder forming portion 62.

[0028] The ridge top surface forming plate 43 consists of a ridge top surface forming portion (upper ridge shaping portion) 61 that compacts the embankment soil to form the ridge top surface, and a ridge shoulder surface forming portion (shoulder shaping portion) 62 that is connected to the end (inner end) of the ridge top surface forming portion 61 on the ridge side forming plate 42 side and compacts the embankment soil to form the ridge shoulder surface.

[0029] Furthermore, the ridge-forming portion 61 has a curved thickness-changing portion 63 in which the plate thickness dimension changes, and a curved constant-thickness portion 64 connected to the front end of the thickness-changing portion 63 in the rotational direction, in which the plate thickness dimension does not change and remains constant.

[0030] In other words, the ridge-forming portion 61 has a constant-thickness portion 64 which is the mounting portion on the front side in the rotational direction of the ridge-forming portion 61, and a thickness-changing portion 63 on the rear side in the rotational direction of the ridge-forming portion 61.

[0031] The boundary line L (the dashed line in the figure) between the constant-thickness section 64 and the thickness-changing section 63 is located parallel (including approximately parallel) to the leading edge of the constant-thickness section 64 in the direction of rotation when viewed from above. The position of the boundary line L is 30% to 50% of the way from the leading end of the ridge-forming section 61 in the direction of rotation towards the rear in the direction of rotation. In other words, the thickness-changing section 63 is a plate-like portion that is the same size as or larger than the constant-thickness section 64.

[0032] Multiple (for example, four) elongated mounting holes 49 are formed in the constant-thickness section 64. The thickness dimension of the constant-thickness section 64 is the same throughout the entire section 64 (excluding the mounting hole portion).

[0033] The plate thickness variation section 63 is formed in such a shape that its plate thickness gradually increases from the front end in the rotational direction to the rear end in the rotational direction. In other words, the plate thickness of the plate thickness variation section 63 gradually increases in the counter-rotational direction from the front end in the rotational direction to the rear end in the rotational direction of the plate thickness variation section 63. Note that the plate thickness at the front end in the rotational direction of the plate thickness variation section 63 is the same as the plate thickness of the constant plate thickness section 64.

[0034] As shown in Figure 5, the inner surface 63a of the thickness-changing portion 63 is formed in the shape of an arcuate surface having a first radius of curvature R1 centered at the first center point O1. The outer surface 63b of the thickness-changing portion is formed in the shape of an arcuate surface having a second radius of curvature R2 centered at a second center point O2, which is different from the first center point O1. This second radius of curvature R2 is larger than the first radius of curvature R1 (R2 > R1).

[0035] Furthermore, the inner surface 64a of the constant-thickness portion 64 is formed in the shape of an arcuate surface having a third radius of curvature R3 centered at the third center point O3. The outer surface 64b of the constant-thickness portion 64 is formed in the shape of an arcuate surface having a fourth radius of curvature R4 centered at the same fourth center point O4 as the third center point O3. This fourth radius of curvature R4 is larger than the third radius of curvature R3 (R4 > R3). Note that the first center point O1, the third center point O3, and the fourth center point O4 are located on the boundary line L, but the second center point O2 is located offset from the boundary line L. Also, the third center point O3 and the fourth center point O4 are located on the rotational axis X.

[0036] Furthermore, the outer corner portion (curved corner) 65 at the rear end of the thickness-changing portion 63 in the rotational direction is formed in the shape of an arcuate surface having a fifth radius of curvature R5 centered on the fifth center point O5.

[0037] For example, the first radius of curvature R1 is "110 mm", the second radius of curvature R2 is "118 mm", the third radius of curvature R3 is "100 mm", the fourth radius of curvature R4 is "103 mm", and the fifth radius of curvature R5 is "3 mm". The inner surface 63a of the thickness-changing section 63 and the inner surface 64a of the constant-thickness section 64 are smoothly connected. Similarly, the outer surface 63b of the thickness-changing section 63 and the outer surface 64b of the constant-thickness section 64 are smoothly connected.

[0038] The ridge shoulder forming portion 62 has a curved constant thickness portion 71 whose plate thickness dimension is the same as the plate thickness dimension of the constant thickness portion 64 of the ridge upper surface forming portion 61, and a curved thickness change portion (shaded portion in Figure 4) 72 connected to this constant thickness portion 71.

[0039] The plate thickness change section 72 is a curvature transition section that smoothly changes curvature from the plate thickness change section 63 of the ridge top surface forming section 61 toward the plate thickness constant section 71 of the ridge shoulder surface forming section 62. This plate thickness change section 72 is formed in such a shape that its plate thickness gradually decreases from the plate thickness change section 63 side of the ridge top surface forming section 61 toward the plate thickness constant section 71 side of the ridge shoulder surface forming section 62 (see Figure 6).

[0040] As shown in Figure 6, the outer corner (curved corner) 73 at the inner end (longitudinal end), which is the end of the constant-thickness section 71 on the ridge-forming plate 42 side, is formed in the shape of an arcuate surface having a sixth radius of curvature R6 centered at the sixth center point O6.

[0041] The sixth radius of curvature R6 is, for example, "0.5 mm". The fifth radius of curvature R5 (for example, 3 mm) is at least three times the sixth radius of curvature R6, i.e., four to eight times, preferably six times. In other words, the arcuate surface of the outer corner 73 at the inner end of the constant thickness section 71 is curved with the sixth radius of curvature R6, and the arcuate surface of the outer corner 65 at the rear end in the rotational direction of the thickness-changing section 63 is curved with the fifth radius of curvature R5, which is at least three times the sixth radius of curvature R6.

[0042] Furthermore, the rear end of the thickness-changing section 72 in the rotational direction is formed in an arc shape that smoothly connects the rear end of the thickness-changing section 63 in the rotational direction and the rear end of the constant-thickness section 71 in the rotational direction.

[0043] Next, the operation of the above-mentioned ridge-forming machine 1 will be explained.

[0044] When the levee-forming machine 1 is attached to the rear of the tractor and the tractor is driven, the levee-forming work section 10 of the levee-forming machine 1 moves in the direction of travel while performing the levee-forming work.

[0045] Specifically, the top surface scraping body 5 scrapes the top surface of the levee (original levee), the embankment body 3 cultivates and piles up the soil of the field surface and the levee (original levee), and the levee forming body 4 compacts the piled-up soil to form the levee (new levee).

[0046] At this time, the ridge side forming plate 42 of the ridge forming body 4 rotates in a predetermined direction about the rotational axis (rotation center) X, compacting the embankment by strongly pushing the soil on the rear side in the direction of rotation to form the ridge side, and the ridge top forming plate 43 of the ridge forming body 4 rotates in a predetermined direction about the rotational axis X, compacting the embankment by strongly pushing the soil on the rear side in the direction of rotation to form the ridge top and ridge shoulder.

[0047] Furthermore, according to the ridge-forming machine 1, the ridge-forming plate 43 of the ridge-forming body 4 has a curved plate thickness-changing portion 63 at least on the rear side in the direction of rotation, and since this plate thickness-changing portion (wear portion) 63 is formed in a shape in which its plate thickness gradually increases from the front end in the direction of rotation to the rear end in the direction of rotation, durability can be improved (lifespan extended) compared to conventional configurations.

[0048] Furthermore, since the outer corner portion 65 at the rear end of the thickness-changing portion 63 in the rotational direction is formed in a gently curved shape, the embankment is not scraped out by sharp corners, and the embankment can be smoothly pressed and applied by the curved corner portion 65, resulting in a good finish.

[0049] In the above embodiment, a configuration was described in which the ridge-forming plate having a thickness-changing portion is a ridge-top-forming plate. However, for example, the ridge-forming plate may be a ridge-side-forming plate, i.e., a configuration in which the ridge-side-forming plate has a thickness-changing portion. Alternatively, both the ridge-side-forming plate and the ridge-top-forming plate may have thickness-changing portions.

[0050] Furthermore, the ridge-forming plate is not limited to having a portion with varying thickness and a portion with constant thickness; for example, it may have a portion with varying thickness only.

[0051] Furthermore, the ridge-forming plate is preferably an elastic plate made of a synthetic resin that can be elastically deformed, but its material is arbitrary and may be metal or the like. [Explanation of Symbols]

[0052] 1. Ridge plastering machine 2 units 3. Embankment 4 Ridge forming body 41. Solids of revolution 43. Ridge-forming plate, which is a ridge-forming plate. 63 Plate thickness change section 63a Inner surface 63b External surface 64 Constant thickness section 65 corners O1 1st center point O2 2nd center point R1 1st radius of curvature R2 Second radius of curvature

Claims

1. A rotating body that rotates in a predetermined direction, The rotating body is provided with a plurality of ridge-forming plates arranged in the direction of rotation, The aforementioned plurality of ridge-forming plates are A curved section with a changing plate thickness dimension, It has a constant thickness section connected to the front end in the rotational direction of the thickness-changing section, The plate thickness variation portion is a ridge-forming body formed in such a shape that its plate thickness gradually increases from the front end in the rotational direction to the rear end in the rotational direction, Regarding the two ridge-forming plates among the plurality of ridge-forming plates that are adjacent to each other in the rotational direction, The outer surface of the portion of the plate thickness change of the ridge-forming plate located on the rear side in the rotational direction of the two ridge-forming plates is exposed. The outer surface of the portion with a constant thickness of the ridge-forming plate located on the rear side in the direction of rotation is covered by the portion with a varying thickness of the ridge-forming plate located on the front side in the direction of rotation. A ridge-forming body characterized by the following.

2. The size of the portion of the ridge-forming plate where the plate thickness changes is greater than or equal to the size of the portion of the ridge-forming plate where the plate thickness is constant. The ridge-forming body according to feature 1.

3. The outer corner of the thickness-changing portion of the ridge-forming plate at the rear end in the rotational direction is formed in an arc shape. The ridge-forming body according to claim 1 or 2, characterized by the above.

4. The ridge-forming plate is either a ridge-top-forming plate or a ridge-side-forming plate. A ridge-forming body according to any one of claims 1 to 3.

5. The unit that is coupled to the vehicle, The embankment provided on the aforementioned aircraft, A ridge-forming body according to any one of claims 1 to 4 provided on the aforementioned machine body A ridge-forming machine characterized by being equipped with the following.

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