JP2008161061A - Power tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type power tiller whose right and left front tilling covers are simply and strongly supported in a simple structure. <P>SOLUTION: This power tiller in which a traveling transmission case 6 and a tilling transmission case 8 are integrally disposed, is characterized by: co-tightly attaching right and left front tilling covers 23a, 23a for covering the front side portion of a tilling device 9 and an upper tilling frame 24 for covering the upper side of the tilling transmission case 8 in the longitudinal direction to right and left attaching portions 31, 31 disposed above the rear side of the traveling transmission case 6 and above the tilling transmission case 8; upward or downward rotatably supporting right and left tilling covers 23b, 23b on the upper tilling frame 24 with hinges 32, 32; upward or downward rotatably supporting right and left side covers 23c, 23c on both the right and left sides of the right and left tilling covers 23b, 23b with the hinges 32, 32; and attaching right and left rear covers 23d, 23d to the rear side end portions of the right and left tilling covers 23b, 23b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tilling cover for a walking type tiller.

In the walking type tiller, the transmission case, the drive wheel chain case that transmits power to the traveling wheels, and the rotary transmission case are integrated, and the rotary cover is attached to the rotary frame that protrudes horizontally from the upper part of the rotary case. What was comprised is well-known (patent document 1).
JP 2000-166303 A

  In the prior art, a rotary frame protrudes in the horizontal direction from the upper part of the rotary case, a front mounting portion and a rear mounting portion are attached to the rotary frame, and a front rotary cover that covers the front side portion of the tillage device is attached to the front mounting portion. The rotary cover that covers the rear upper side of the tilling device is attached to the rear attachment portion. Therefore, the rotary frame requires a mounting portion for the front rotary cover and the rear rotary cover, and there is a problem that the mounting configuration of the rotary cover becomes complicated. Therefore, the present invention is intended to solve such problems.

  According to the first aspect of the present invention, a traveling transmission case (6) and a tilling device (9) for transmitting power from the engine (E) to the left and right wheels (7, 7) via a transmission and a traveling transmission device are provided at the lower part. In the cultivator integrally configured with the provided transmission case (8), left and right attachment portions (31, 31) provided on the rear upper part of the traveling transmission case (6) and in the vicinity of the upper part of the transmission case (8). 31) a left and right tilling front cover (23a, 23a) covering the front side of the tilling device (9), and a tilling upper frame (24) along the front-rear direction covering the top of the tilling transmission case (8). The left and right tillage covers (23b, 23b) that cover the upper side of the tillage device (9) are attached to the left and right sides of the tiller upper frame (24) by the hinges (32, 32). The left and right tillage cover is supported movably The left and right side covers (23c, 23c) that cover the left and right sides of the tillage device (9) are supported on the left and right sides of the tiller device (9) by hinges (32, 32) so as to be rotatable up and down. , 23b) The tiller is characterized in that left and right rear covers (23d, 23d) are attached to the rear end portion.

  According to the said structure, the cultivation soil reverse-plowed by the tillage device (9) by the right and left tilling front covers (23a, 23a) attached to the traveling transmission case (6) together with the tilling upper frame (24) is The left and right tillage covers (23b, 23b) are supported by the tiller upper frame (24) guided upward and attached together with the left and right tilling front covers (23a, 23a). 23b) supports the left and right side covers (23c, 23c).

  In the invention of claim 2, the left and right front and rear front covers (23a, 23a), the left and right tillage side covers (23c, 23c), and the right and left rear covers (23d, 23d) are covered with left and right front and rear covers made of a flexible material. Plates (33, 33, 34, 34) are connected, and the left and right front and rear cover plates (33, 33) are provided at the left and right ends of the front tillage cover (23a, 23a) and the left and right rear covers (23d, 23d). , 34, 34) The cultivator according to claim 1, further comprising left and right front and rear stoppers (35, 35, 36, 36) for preventing rotation to the inside.

  According to the said structure, in addition to the said effect | action of invention of Claim 1, the left and right tillage side cover (23c, 23c) and the left and right front and rear cover plates (33, 33, 34, 34) are the right and left tilling front cover cover (23a , 23a) and left and right front and rear stoppers (35, 35, 36, 36) attached to the left and right ends of the left and right rear covers (23d, 23d) are prevented from turning inward.

The invention of claim 1 can firmly support the left and right tilling covers (23a, 23a) with a simple configuration.
In addition to the above-mentioned effect of the invention of claim 1, the invention of claim 2 includes the left and right tillage side covers (23c, 23c), the left and right front and rear cover plates (33, 33, 34, 34) and the tillage device (9). Interference with the tilling nail can be prevented.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a side view of a walking type tiller equipped with the present invention. First, the overall configuration of the walking type tiller T will be described.

  The frame structure of the walking type tiller T is such that the engine mounting frame 1 extends forward from the lower front side of the traveling transmission case 6, the engine E is mounted on the frame 1, and the front end of the frame 1 also serves as a bumper The weight 2 is attached. A fuel tank 3 is disposed above the engine E, and the fuel in the fuel tank 3 is sent to the combustion chamber of the engine E via a fuel pipe (not shown), a filter (not shown), and the like. is doing.

  Further, left and right wheels 7, 7 are disposed on the lower side of the traveling transmission case 6, and an integrated tillage transmission case 8 is extended rearward and obliquely downward from the upper rear side of the traveling transmission case 6. A cultivating device 9 including a cultivating shaft and a cultivating claw is provided below the cultivating transmission case 8. Further, the rotational power of the engine E is transmitted to the traveling transmission case 6 via a belt transmission device in the transmission case 10, and further, via a transmission and a traveling transmission device (not shown) in the traveling transmission case 6. It is transmitted to the left and right wheels 7, 7 and is transmitted to the tilling device 9 via the tilling transmission device (not shown) in the tilling transmission case 8.

  Further, a loop-like handle 12 is provided on the rear upper part of the traveling transmission case 6 in a plan view, and the handle 12 is a so-called so-called urging clutch for traveling in a traveling transmission device (not shown). A deadman clutch lever 13 is provided, and the deadman clutch lever is configured to engage the traveling clutch only while operating downward along the handle 12.

  Further, a shift lever 5 is provided on the lower left and right sides of the handle 12, and by operating the shift lever 5 along the shift groove of the shift guide cover 14, the transmission in the traveling transmission case 6 is shifted to a high or low level. The rotation direction of the tillage transmission device in the tillage transmission case 8 is switched, and the tillage device 9 is configured to rotate down-cut or up-cut.

Next, the cultivating unit 21 of the walking type tiller T will be described.
The tilling transmission case 8 is disposed at the center of the tilling portion 21 in the left-right direction, and the tiller 9 comprising a resistance rod 22, a tilling cover 23, a tilling shaft and a number of tilling claws serving as a tilling depth setting tool is disposed in the case 8. Is provided. A lower frame 26 is extended from the rear lower part of the transmission case 8 to the rear upper side, a support cylinder 27 is provided at the rear end part of the lower frame 26, and the resistance rod 22 is inserted into and supported by the support cylinder 27. It is supported by the support pin so that it can be adjusted up and down.

Next, the tilling cover 23 of the tilling portion 21 will be described with reference to FIGS.
In the vicinity of the upper part of the tillage transmission case 8 at the upper rear side of the traveling transmission case 6, left and right mounting portions 31, 31 are provided integrally with the traveling transmission case 6. The left and right attachment portions 31 and 31 are configured as plates that are inclined rearward and upward, and the left and right tillage front covers 23a and 23a are disposed on the left and right attachment portions 31 and 31 along the left and right directions. It is configured so as to cover the front side portion of the device 9, and a plate-shaped tilling upper frame 24 is provided along the front-rear direction so as to cover the upper side of the transmission case 8 for tilling, before the left and right tilling The covers 23a, 23a and the cultivation upper frame 24 are fastened together with bolts and nuts, and the rear side of the cultivation upper frame 24 is supported by the cultivation lower frame 26.

  Left and right tillage covers 23b and 23b are supported by hinges 32 and 32 on both the left and right sides of the upper cultivation frame 24, and the left and right side covers 23c and 23c are hinged 32 on the left and right sides of the left and right tillage covers 23b and 23b. , 32, left and right rear covers 23d, 23d are attached to the rear ends of the left and right tillage covers 23b, 23b, a central rear cover 23e is attached to the rear end of the tiller upper frame 24, and the left and right rear covers 23d, 23d are attached. It is comprised so that the space | interval part may be covered.

  Further, the left and right plowing front covers 23b, 23b and the left and right plowing side covers 23c, 23c are connected to each other by fan-shaped left and right front covering plates 33, 33 made of a flexible surname material such as rubber, The left and right sides of the left and right rear rod front covers 23b, 23b and the rear ends of the left and right tillable side covers 23c, 23c are connected by fan-shaped left and right rear cover plates 34, 34 made of a flexible surname material such as rubber. Yes. Left and right front stoppers 35 and 35 are provided at both left and right ends of the left and right tillage front covers 23b and 23b, and left and right rear stoppers 36 and 36 are provided at left and right ends of the left and right rear covers 23d and 23d. , 33 and the left and right rear cover plates 34, 34 are prevented from rotating toward the tilling device 9 and are not interfered with the tilling claws.

According to the said structure, it can support firmly firmly, simplifying the attachment structure of the left-and-right tilling cover 23a, 23a.
Further, when the left and right tillage covers 23b and 23b are supported on the left and right sides of the tiller upper frame 24 by the hinges 32 and 32 so as to be pivotable up and down, as shown in FIGS. 39, the inner mounting plates 32a, 32a of the left and right hinges 32, 32 are attached to the lower surface of the plate body 39, and the shaft support portions 32b of the hinges 32, 32 are attached to the left and right outer edges along the front-rear direction of the tiller upper frame 24. The left and right tillage covers 23b and 23b are attached to the outer mounting plates 32c and 32c of the left and right hinges 32 and 32, respectively.

  By comprising in this way, cultivation soil does not spill or clog from the attachment part of the cultivation upper frame 24, the right and left cultivation covers 23b and 23b, and the left and right hinges 32 and 32, and the right and left cultivation covers 23b and 23b can be made smooth. Can be opened and closed.

  Further, as shown in FIGS. 6 and 8, the lower rear center of the central rear cover 23e is attached with bolts and nuts so as to sandwich the upper and lower leveling plates 41 and 41, thereby forming the weight of the central rear cover 23e. . Further, a hole 42 for mounting the work implement is formed on the upper side of the central rear cover 23e, a rubber plate 43 is attached to the rear end of the tiller upper frame 24, and a hole for mounting the work implement on the central rear cover 23e. 42 is closed.

  According to the said structure, when the center part of cultivated soil rises, the upper and lower leveling boards 41 and 41 can make a pressing cultivation field flat. Further, when the work implement is not attached to the hitch 38, the hole 42 of the central rear cover 23e can be closed with the rubber plate 43 to prevent the cultivation soil from scattering.

  Further, as shown in FIG. 8, a support cylinder 27 is provided at the rear end of the tilling lower frame 26 extending rearward from the tillage transmission case 8, and the resistance bar 22 is inserted and supported in the support cylinder 27. A fixing bolt 37 provided on the front side portion of the support cylinder 27 is attached so as to be vertically adjustable. Further, a hitch 38 for attaching the work machine is extended from the upper side of the support cylinder 27 toward the rear, and a tail wheel or a soil cultivator is attached to the hitch 38. Further, since the fixing bolt 37 is provided on the front side portion of the support cylinder 27 and the hitch 38 for attaching the work machine is provided on the rear side, the fixing bolt 37 is attached without obstructing when the work machine is attached to the hitch 38. be able to.

Next, another embodiment of the tillage device 9 will be described with reference to FIGS. 9 and 10.
The left and right tillage shafts 51 and 51 are divided into left and right inner tillage shafts 51a and 51a and left and right outside tillage shafts 51b and 51b, and the inside portions of the left and right outside tillage shafts 51b and 51a are fitted to the outside portions of the left and right inside tillage shafts 51a and 51a. And are detachably connected by pins. A plurality of plate-like tilling claws 52 are attached to the claw holders of the left and right inner tillage shafts 51a and 51a and the left and right outer tillage shafts 51b and 51b.

  As shown in FIG. 9B, the plate-shaped tilling claws 52, 52 are configured so that the base end portion of the plate body is narrow in the rotation direction in a side view, and the rotation direction sequentially from the base end portion to the middle portion. It is configured so as to become wider, and is configured so as to become narrower sequentially from the midway part to the tip part. Then, the front end portion is formed into a front end bent portion 52a that bends to the left and right sides with reference to the front and rear rotation surface, and the front end bent portion 52a is attached to the tilling shaft 51 so as to face the left and right outer sides.

  Further, a forward rotation inclined surface 52b that is inclined leftward and rightward from the upper side in the forward rotation direction toward the lower side halfway portion is formed in the midway portion in the radial direction on the side surface of the plate body, and the lower side in the forward rotation direction from the middle portion A reversely inclined surface 52c is formed so as to sequentially close the bulges toward. Then, a straight line connecting the forward rotation upper side end of the forward rotation inclined surface 52b and the forward rotation lower side end of the reverse rotation inclined surface 52c, and a rotation reference plane orthogonal to the axis of the left and right tillage shafts 51 and 51, Is attached to the tilling shaft 51 so that the inclination angle α <the inclination angle β is satisfied, and the angle between the reverse inclined surface 52c and the rotation reference surface is β (for example, 8 degrees). ing.

  According to the above-described configuration, during forward tillage, the forward inclined surface 52b of the plate-shaped tilling claw 52 enters the soil straight so as to substantially follow the rotation direction, and the inclination angle α of the inner side surface of the plate-like tilling claw 52 is small. Therefore, it is possible to carry out normal tillage while reducing the movement of the soil left and right outside.

  Further, at the time of reverse tillage, the reversely inclined surface 52c of the plate-shaped tilling claw 52 which is greatly inclined enters the soil and moves the soil greatly to the left and right outside, and the forwardly inclined surface 52b of the plate-shaped tilling claw 52 follows the soil. When detaching from the inside, due to the pressing action of the distal bent portion 52a to the left and right outer sides, the soil is greatly released to the left and right outer sides to raise, and a large groove is formed on the left and right sides while forming a large groove below the tillage transmission case 8. Can be formed.

  In the state where the left and right tillage shafts 51, 51 are connected to the left and right inner tillage shafts 51a, 51a to the left and right outside tillage shafts 51b, 51b, a large ridge is formed while forming a wide groove below the tillage transmission case 8, Further, as shown in FIG. 10, in a state where the left and right outer tillage shafts 51b and 51b are removed from the left and right inner tillage shafts 51a and 51a, the space between the left and right wheels 7 and 7 is not changed, and the bottom of the transmission case 8 for tillage is provided. Small ridges can be formed while forming narrow grooves.

  Next, the left and right rolling wheels 56 of the axle tillage type tiller will be described with reference to FIG. An engine E 58 is mounted on the engine frame 58 projecting forward from the top of the tillage transmission case 57, and the handle 59 extends rearward and upward from the top of the tillage transmission case 57. A tilling device 9 is provided. The upper side of the tillage device 9 is covered with the tillage cover 23, a work implement such as a cultivator is attached to the rear hitch 60 provided at the rear portion of the tillage cover 23, and the rear wheel attachment portion 64 provided below the rear hitch 60 is The left and right support rods 61 and 61 with the left and right rolling wheels 56 and 56 are supported so that the vertical rotation can be adjusted. Further, a front wheel mounting portion 62 is provided on the front side portion of the engine frame 58, and the left and right support rods 61, 61 with the left and right wheels 56, 56 removed from the rear wheel mounting portion 64 are rotated up and down to the wheel mounting portion 62. It is configured to be adjustable.

  According to the above configuration, when the left and right wheels 56, 56 are attached to the rear side of the machine body, the left and right wheels 56, 56 are turned upward to perform the tilling operation, and the downward rotation state is set to push down the handle 59 to perform the tilling. The vehicle can travel on the road while the device 9 is floating. In addition, when the left and right wheels 56, 56 are attached to the front side of the machine body, the left and right wheels 56, 56 are plowed at two positions of the ascending rotation position and run on the road at the two positions of the descending rotation position. Can do.

Side view of a field cultivator Side view of the rear of the field cultivator Expanded side view of the rear of the field cultivator Top view of the rear of the cultivator Side view of the rear of the field cultivator Rear view of the rear of the field cultivator Enlarged rear view of the rear of the cultivator Side view of the rear of the field cultivator (A) Rear view of tillage device (B) Top view of tillage nail Rear view of the field cultivator Side view of a field cultivator

Explanation of symbols

E Engine 6 Traveling transmission case 7 Wheel 8 Tilling transmission case 9 Tillage device 23a Tillage front cover cover 23b Left and right tillage cover 12c Left and right side cover 23d Left and right rear cover 24 Tillage upper frame 31 Mounting portion 32 Hinge 33 Front cover plate 34 Back cover Plate 35 Front stopper 36 Rear stopper

Claims (2)

  A power transmission case (6) for transmitting power from the engine (E) to the left and right wheels (7, 7) via a transmission and a power transmission, and a power transmission case for a power tiller (9) provided at the bottom ( 8) and the left and right mounting portions (31, 31) provided in the upper rear portion of the traveling transmission case (6) and in the vicinity of the upper portion of the tilling transmission case (8). The left and right tilling front covers (23a, 23a) covering the front side of (9) and the front side of the tilling upper frame (24) along the front-rear direction covering the top of the transmission case (8) for tilling are fastened together. The left and right tillage covers (23b, 23b) covering the upper side of the tillage device (9) are supported on the left and right sides of the tiller upper frame (24) by the hinges (32, 32) so as to be pivotable up and down. Left and right tillage cover (23b, 23b) The left and right side covers (23c, 23c) that cover the left and right sides of the tillage device (9) are supported by the hinges (32, 32) so as to be rotatable up and down on both the left and right sides, and after the left and right tillage covers (23b, 23b). A cultivator having left and right rear covers (23d, 23d) attached to side end portions.   Adjacent portions of the left and right tillage front cover covers (23a, 23a), the left and right tillage side covers (23c, 23c) and the left and right rear covers (23d, 23d) are arranged on left and right front and rear cover plates (33, 33, 34, 34), and the left and right front and rear cover plates (33, 33, 34, 34) are attached to the left and right ends of the front cover cover (23a, 23a) and the left and right rear covers (23d, 23d). The tiller according to claim 1, wherein left and right front and rear stoppers (35, 35, 36, 36) for preventing inward rotation are provided.

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