JP2014124131A - Tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To configure a so-called front rotary type tiller capable of forming a favorably heaped ridge in the front rotary type tiller having tilling claws in the front side of traveling wheels.SOLUTION: The tiller comprises: a tillage part (K) in front of traveling wheels (1); a lifting/lowering shaft (20) at the rear of the traveling wheel (1), which extends in the horizontal direction; and forming devices (21) at both left/right sides of the lifting/lowering shaft (20) for forming a forming face (27a) inward the respective left/right thereof. The forming devices (21) can be switched between a listing attitude and a non-listing attitude by lifting/lowering operation of the lifting/lowering shaft (20).

Description

  The present invention relates to a cultivator.

In patent document 1 and patent document 2, the technique which provides a tilling nail | claw in the front side of a driving | running | working wheel, and provides the vertical stand which forms a fence behind a driving | running | working wheel is described.
However, the erecting apparatus described in Patent Document 1 and Patent Document 2 is for so-called external laying that forms a ridge on the outside of the machine body.

There are two methods for forming the ridges: the above-mentioned outer scale and the inner scale that forms the heel on the inside of the aircraft.
The outer scale has the disadvantage that the width of the ridge changes depending on the operation of the operator and the width of the ridge is not stable. Because the first straight run will form one side of the kite and turn, and the second straight run will form the other side of the kite, so the kite will be completed. This is because the width of the kite changes depending on whether it is performed from the point.

  On the other hand, since the inner scale forms both side surfaces of the ridge by one tilling operation, there is an advantage that the width of the ridge is always constant.

JP 2000-262104 A JP 2004-208598 A

  It is an object of the present invention to provide a structure capable of forming a good internally-filled ridge in a so-called front rotary cultivator in which a tilling claw is provided on the front side of a traveling wheel.

The present invention takes the following technical means in order to solve this problem.
The invention according to claim 1 is provided with a tillage part (K) in front of the traveling wheel (1),
A lifting shaft (20) extending in the left-right direction is provided behind the traveling wheel (1),
On both the left and right sides of the elevating shaft (20), a molding machine (21) for forming a molding surface (27a) on the left and right inner sides is attached,
The tiller is configured such that the molding machine (21) can be switched between the upright posture and the non-upright posture by the lifting and lowering operation of the lifting shaft (20).

The invention according to claim 2 is the cultivator according to claim 1, characterized in that the molding machine (21) is provided at a position where it overlaps with the traveling wheel (1) in rear view.
The invention according to claim 3 is characterized in that the distance between the molding surfaces (27a) of the pair of left and right molding plates (27) is narrower toward the rear side. The cultivator is as described.

  According to the invention of claim 4, the molding device (21) is constituted by a guide plate (26) having a guide surface (26a) facing the front side and a molded plate (27) having a molding surface (27a). The cultivator according to any one of claims 1 to 3, wherein the cultivator is characterized by the following.

  According to a fifth aspect of the present invention, the elevating shaft (20) is provided with a collar upper surface leveling plate (23) that comes into contact with the upper surface (U2) of the collar formed by the molding machine (21). Use any of the cultivators.

  According to the first aspect of the present invention, in the cultivator provided with the tilling part (K) on the front side of the traveling wheel (1), the inner ridge (U) can be formed. Further, by raising and lowering the elevating shaft (20), the left and right molding machines (21) can be simultaneously switched between the standing posture and the non-standing posture.

  According to the second aspect of the present invention, since the traveling wheel (1) passes and a certain amount of grooves (M) are formed when the traveling wheel (1) sinks, it passes behind the traveling wheel (1). The resistance of the soil when the groove (M) is formed by the molding machine (21), particularly the guide plate (26), can be reduced. Therefore, the operation load on the operator can be reduced.

  In the invention according to claim 3, the distance between the molding surfaces (27a) of the pair of left and right molding plates (27) is formed so as to be narrowed rearward so that the soil is gradually brought into the left and right inner sides and the pressing force to the soil Can be increased sequentially. Therefore, it is possible to reliably gather the soil and form a well-shaped ridge (U) having a strong side surface.

  The invention according to claim 4 secures the amount of soil necessary for the ridge (U) by reliably bringing the soil to the left and right inner sides by the guide surface (26a) of the guide plate (26) inclined backward to the left and right. be able to. Moreover, the soil brought to the left and right inner sides by the guide plate (26) can be smoothly transferred to the molding surface (27a).

  According to the fifth aspect of the present invention, the upper surface of the ridge (U2) is leveled by the heel upper surface leveling plate (23), whereby the upper surface of the ridge (U) can be leveled well.

Side view of the field cultivator during cocoon molding Side view of a field cultivator during non-molding Top view of the field cultivator Illustration explaining the molding process from the back The figure which shows the principal part of the invention seen from the plane

The cultivator according to the embodiment of the present invention will be described below.
In the present embodiment, the traveling direction is referred to as the front, and the direction crossing the traveling direction is referred to as the left-right direction.
At the front side of the pair of left and right traveling wheels 1 supported by the axle 1a, a cultivating section K including a plurality of cultivating claws 3 attached to the cultivating shaft 2 and a cultivating cover 4 covering the cultivating claws 3 is provided. The width of the tillage part K of the present embodiment is substantially the same as the width between the left and right traveling wheels 1.

  A mission case 5 that is transmitted to the traveling wheel 1 is provided on the left and right inner sides of the traveling wheel 1, and the mission case 5 extends to the front side to transmit power to the tillage part K. An airframe frame 6, an engine 7 and a fuel tank 8 are provided above the mission case 5, and an operation handle 9 extending rearward and obliquely upward is provided from the rear portion of the airframe frame 6.

  A moving wheel 10 for movement is provided in front of the tillage part K. The moving wheel 10 is attached to one end of the moving wheel shaft 11, the other end of the moving wheel shaft 11 is attached to the tillage cover 4 side, and the moving wheel shaft 11 is configured to be rotatable in the vertical direction. That is, when moving, the moving wheel shaft 11 is lowered to bring the moving wheel 10 into contact with the ground, and when plowing or standing, the moving wheel shaft 11 is raised to place the moving wheel 10 in a non-grounded state.

  The operation handle 9 is formed in a loop type, and an engine start switch 12 and a clutch lever 13 are provided. In the present embodiment, a deadman type clutch lever 13 is employed in which power is transmitted to the traveling and tilling section K when the clutch lever 13 is gripped, and transmission is cut off when the clutch lever 13 is released.

Next, the upright part which forms a ridge is demonstrated.
An upright support plate 14 extending rearward is attached to the rear portion of the mission case 5. The upright support plate 14 supports the rotation shaft 15. The rotation shaft 15 is configured such that the central portion 15a to which the upright support plate 14 is attached is fixed and the left and right side portions 15b are rotated about the horizontal axis. The rotation shaft 15 is formed in a hollow shape, and a fulcrum shaft 31 that supports the rotation shaft 15 is provided therein. The fulcrum shaft 31 is configured to rotate together with the left and right side portions 15 b of the rotation shaft 15.

  A front portion of the link plate 16 is connected to the left and right side portions 15b of the rotation shaft 15, and a lifting shaft 20 extending in the left-right direction is connected to the rear portion of the link plate 16. A pair of left and right link plates 16 are provided with a pair of left and right upright support plates 14 interposed therebetween, and first hooks 17 are provided on the outer surfaces of the link plates 16. A second hook 18 is provided on the outer surface of each of the pair of left and right upright support plates 14, and the first hook 17 and the second hook 18 are wound by a spring 19.

Since the central portion 15a of the rotation shaft 15 of the present embodiment is fixed and does not rotate, this portion may be referred to as a fixed shaft and the left and right side portions 15b may be referred to as rotation shafts.
The width of the elevating shaft 20 in the left-right direction is configured to be substantially the same as the width of the traveling wheel 1, and a pair of left and right molding machines 21 are connected to the left and right sides, respectively. A lifting lever 22 is attached to the middle of the lifting shaft 20.

  Further, the elevating shaft 20 is provided with a top surface leveling plate 23 via a vertical adjustment member 24. The upper surface leveling plate 23 is formed in a plate shape narrower than the width of the left and right molding devices 21, and is provided in parallel with the lifting shaft 20. The vertical adjustment member 24 has a structure in which a long hole 24b is formed in the mounting plate 24a, and the upper surface leveling plate 23 is adjusted and fixed in the vertical direction by the butterfly bolt 25.

Next, the configuration of the molding device 21 will be described.
The molding machine 21 is provided behind the traveling wheel 1 and is configured to wrap in the rear view. The molding machine 21 includes a guide plate 26 that forms a flat guide surface 26a on the front side, a molding plate 27 that forms a flat molding surface 27a on the left and right inner sides, and a groove leveler that forms a flat groove leveling surface 28a on the lower side. The plate 28 and a molding tool attachment 29 for attaching the molding machine 21 to the lifting shaft 20 are configured.

  The guide surface 26 a of the guide plate 26 is at a position facing the back surface of the traveling wheel 1, and is formed to have substantially the same width as the traveling wheel 1. Moreover, it is set as the structure extended toward the back side with a gentle angle from the left-right outer side toward the left-right inner side. The molding surface 27a is configured to face the left and right inner sides, is provided rearward from the end portion of the guide surface 26a, and is inclined toward the left and right inner sides.

  That is, the distance S between the molding surfaces 27a of the pair of left and right molding plates 27 is wider toward the front side and narrower toward the rear side. Further, the left and right molding surfaces 27a are formed so as to extend downward, so that the distance S between the molding surfaces 27a of the pair of left and right molding plates 27 is narrower toward the upper side and wider toward the lower side. The groove leveling plate 28 connects the lower end portion of the guide plate 26 and the lower end portion of the forming plate 27, and the guide plate 26, the forming plate 27, and the groove leveling plate 28 are integrally formed to form the structure of the molding machine 21. It is solid. In order to form the guide plate 26 and the molding plate 27 in a substantially L shape in plan view, the longitudinal length G of the molding surface 27a is longer than the lateral width F of the guide surface 26a. The molding tool attachment 29 has a configuration in which one end is attached to the back surface of the guide plate 26 and the other end is attached to the lifting shaft 20.

Next, the operation during the erection operation will be described.
The operator sets the molding machine 21 at the upright position in FIG. That is, in the standing posture position, the guide surface 26a faces the traveling wheel 1 and the groove leveling surface 28a faces the ground. Then, when the engine 7 is started and the shift lever 30 is put in a tillage position (not shown) and the clutch lever 13 is gripped, the tillage claw 3 rotates while the tiller runs forward, and the tilling work and the standing work are performed. Be started.

  The soil splashed rearward by the tillage claw 3 is guided toward the left and right inner sides by the guide surface 26 a of the guide plate 26. Then, the soil is raised toward the left and right inner sides with the left and right molding plates 27, and the side surfaces U <b> 1 of the heel are formed by pressing the left and right sides of the heel with the rear portion of the molding plate 27. On the other hand, the heel upper surface leveling plate 23 leveles the upper surface U2 of the heel so that a trapezoidal ridge U is formed. In the present embodiment, it is a so-called internal-type ridge that forms the ridge U by a single progression.

  When the molding machine 21 is brought into a non-standing position at the time of a simple tilling work without an uprighting work or when the tiller is moved, the operator holds the lifting lever 22 and pulls it upward. Then, the elevating shaft 20 and the link plate 16 are raised by the rotation of the left and right side portions 15b of the rotation shaft 15 and the fulcrum shaft 31, and the molding device 21 is also raised toward the non-standing posture position. As shown in FIG. 2, when the spring 19 rises to a position higher than the pivot shaft 15 (beyond the fulcrum), the position of the link plate 16 is fixed by the pulling force of the spring 19, whereby the elevating shaft 20 and the molding machine 21. Is fixed in the non-standing position. Needless to say, the elevator lever 22 is pushed down when switching from the non-standing posture position to the standing posture position. In addition, about the structure which supports the standing part of FIG. 1 and FIG. 2, in order to make operation | movement easy to understand, it has shown as the continuous line.

Next, features of the molding machine 21 of the present embodiment will be described below.
The molding machine 21 of the present embodiment can be switched to the upright work position or the non-upright work position only by operating the lifting lever 22. Further, the standing posture position and the non-standing posture position are fixed by the action of the spring 19, and the molding machine 21 hardly swings at any position, so that smooth standing work or tilling work and movement can be performed.

  The molding machine 21 forms a ridge U and also forms grooves M on the left and right sides of the ridge U. The molding machine 21 of the present embodiment is in a position where it overlaps with the traveling wheel 1 in a rear view. Therefore, the traveling wheel 1 passes and a certain amount of grooves (轍) are formed when the traveling wheel 1 sinks, and the groove M is formed by the molding machine 21 that passes behind the traveling wheel 1, especially the guide plate 26. The resistance of the soil when doing so can be reduced. Therefore, the operation load on the operator can be reduced. In particular, by making the guide plate 26 substantially the same width as the traveling wheel 1, the guide plate 26 can easily pass through the groove formed by the passage of the traveling wheel 1, and the guide plate 26 has substantially the same width as the guide plate 26. The groove leveling plate 28 to be formed can easily level the groove formed by the guide plate 26, and the clean groove M can be formed while eliminating the wrinkles of the traveling wheel 1.

  In addition, the molding machine 21 of the present embodiment can gradually bring the soil to the left and right inner sides by narrowing the left and right distances, and can sequentially increase the pressing force on the soil. Therefore, it is possible to reliably gather the soil and form the well-shaped ridge U having a strong side surface.

  Moreover, the amount of soil necessary for the dredging can be ensured by reliably bringing the soil to the left and right inner sides by the guide surface 26a of the guide plate 26 inclined rearward to the left and right inner sides. Further, by forming the guide surface 26a and the molding surface 27a in succession (L-shaped), the soil brought to the left and right inside by the guide plate 26 can be smoothly transferred to the molding surface 27a.

The height of the heel upper surface can be arbitrarily adjusted by making the heel upper surface leveling plate 23 vertically adjustable.
In the present embodiment, the lifting shaft 20 is connected to the rotating shaft 15 via the link plate 16 and the molding device 21 is attached to the lifting shaft 20. However, the rotating shaft 15 is provided behind the traveling wheel 1. Alternatively, the molding device 21 may be attached to the left and right side portions 15b of the rotation shaft 15. In this case, the lifting / lowering lever 22 can be attached to the rotating shaft 15 and a fixing member (not shown) for fixing the position of the rotating shaft 15 in the standing posture and the non-standing posture can be provided. .

It is also possible to configure the lifting / lowering operation of the lifting / lowering shaft 20 to be a vertical slide type.
Moreover, although the position of the molding device 21 of the present embodiment is fixed, it is possible to adjust the heel width by making it slidable along the lifting shaft 20.

  The field cultivator of the present embodiment is an engine-type field cultivator, but an electric field cultivator is also possible.

DESCRIPTION OF SYMBOLS 1 Traveling wheel 20 Elevating shaft 21 Molding device 23 畝 Upper surface equalizing plate 26 Guide plate 26a Guide surface 27 Molding plate 27a Molding surface K Tillage part U

Claims (5)

In front of the traveling wheel, a tillage part is provided,
A lifting shaft extending in the left-right direction is provided behind the traveling wheel,
At the left and right sides of the lifting shaft, attach molding machines that form molding surfaces on the left and right sides respectively.
A tiller configured to be capable of switching between a standing posture and a non-standing posture by a lifting operation of a lifting shaft.   2. The cultivator according to claim 1, wherein the forming device is provided at a position where the forming device is overlapped with the traveling wheel in a rear view.   3. The cultivator according to claim 1, wherein the distance between the molding surfaces of the pair of left and right molding plates is narrower toward the rear side.   The cultivator according to any one of claims 1 to 3, wherein the molding device includes a guide plate having a guide surface facing the front side and a molding plate having the molding surface.   The cultivator according to any one of claims 1 to 4, wherein the elevating shaft is provided with a heel upper surface leveling plate that comes into contact with an upper surface of the ridge formed by the forming device.

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