JP4692194B2 - Walking type tillage device - Google Patents

Description

  The present invention relates to a walking type tillage device that performs tilling, raising work and the like in a field.

In general, there is a vertical tillage device provided with a drive shaft that is driven by the engine and provided in a vertical direction in a transmission case that extends downward to support a small engine (Patent Document 1).
The driving force of the engine is arranged on the outer periphery of the axle, rotating the axle supported downward via the vertical axis, and sinking the lower end side of the resistance rod provided to be located rearward in the soil The soil can be cultivated with the nail, and when moving, the resistance rod is raised and the axle is rotated.
JP2003-225001

  However, in the above configuration, since the cylinder head is directed to the rear side, the engine weight is applied to the rear side. It was not suitable for work. Therefore, it is a technical object of the present invention to provide a management machine with a good front / rear balance.

Therefore, the present invention has taken the following technical means.
That is, the engine (2) is arranged on the upper part of the longitudinally long transmission case (1), and the transmission shaft (11) that is rotationally interlocked by the engine (2) is provided inside, and the transmission case (1) is provided at the lower end side. A working machine frame (20) to be mounted on the transmission case (1) portion while providing a tilling shaft (14L, 14R) having a plurality of tilling claws (17, 17 ...) arranged on the outer periphery in conjunction with the transmission shaft (11). In the walking type tilling device, which is provided with a handle frame (21) facing the rear upper side of the machine body, while the handle frame (21) is mounted on the handle frame (21), the handle frame (21) is an upper portion provided with a base frame portion (21a) and a gripping portion. The base frame portion (21a) is provided with a frame portion (21b) that is tilted so that the base frame portion (21a) is sandwiched between the work machine frame (20) in the left and right direction and toward the upper rear side, near the upper end of the base frame portion (21a). A suspension handle (26) extending above the engine (2) is provided, and the cylinder part (2a) of the engine (2) is provided so as to be tilted forward and the cylinder part of the engine (2) ( 2a) is provided to be deviated forward with respect to the longitudinal axis (b) of the transmission shaft (11) in the transmission case (1), and the tilling shaft (12) is disposed on the longitudinal axis (a). In contrast , the work shaft is provided with a configuration in which the transmission shaft (11) is interlocked with the crankshaft (2b) of the engine (2) via a bevel gear mechanism (12a, 12b). 20), a twin tail wheel (22) is provided on the front side of the upright (23) so as to be rotatable around a support shaft (30) supporting the arm portion (22a). It is characterized by being fixed to the inverted posture (e).

  When the engine (2) is driven, the tillage shafts (14L, 4R) are rotationally driven via the transmission shaft (11) in the transmission case (1). The operator performs the tilling work while grasping and operating the handle portion on the upper end side of the handle frame (21). The work frame (20) is mounted with a vertical stand (23) to perform the vertical work together with the tilling work. The cylinder (2a) of the engine (2) has a transmission shaft (11) in the transmission case (1). The vertical axis core (A) is offset from the front side and the tilling axis (12) is offset from the vertical axis axis (A) to the rear side. The load on the front side increases due to the loads of the transmission case (1) and the engine (2), and the traction force increases because it acts on the tilling shaft (14L, 4R) together with the load of the rear stand (23).

According to the present invention, the engine (2) is provided with its cylinder part (2a) deviated forward from the longitudinal axis (b) of the transmission shaft (11) in the transmission case (1), and Since the tilling shafts (14L, 14R) are provided rearwardly with respect to the longitudinal axis (a), the load on the front side becomes large due to the loads of the transmission case (1) and the engine (2). As a result of acting on the tilling shafts (14L, 14R) together with the load of the rear stand (23), the traction force increases, so that the disadvantages of the prior art can be eliminated and the workability can be improved.
In addition, the twin tail wheel (22) is provided so as to be rotatable around the support shaft (30) supporting the arm portion (22a) and is fixed to the body movement posture (d) and the reverse posture (e). Further, since the tilling work or the standing work can be performed while being mounted on the airframe as the inverted posture (e), a further load is applied to the tilling shafts (14L, 14R) to improve the traction force.

The present invention will be described below with reference to the drawings.
An engine 2 is detachably provided on the upper surface of the transmission case 1 via an attachment base member 3. That is, the engine 2 is provided so that the cylinder 2a is inclined forward, and the fuel tank 4 is disposed behind the engine 2, the muffler 5 is disposed on the left and right sides, and the air cleaner 6 is disposed on the other side. The base member 3 is attached to the mounting base member 3 and can be bolted by joining the base member 3 to the flange-shaped large diameter portion 1A formed on the upper surface of the transmission case 1. Reference numeral 7 denotes a starter provided in the upper part of the engine 2.

  A transmission shaft 11 having an axial core (b) in the vertical direction (vertical direction) is provided in the transmission case 1 in which the two half-case bodies 1a and 1b are joined from the left and right. The transmission shaft 11 is divided into two vertically divided shafts 11 a and 11 b, and is unified by screwing, and the upper and lower portions are supported by a bearing 8 and a bush 9.

  Reference numeral 10 denotes a clutch drum, and a centrifugal clutch 13 that is transmitted to the crankshaft 2b of the engine 2 via bevel gear mechanisms 12a and 12b acts on the clutch drum 10 to link the power of the engine 2 to the transmission shaft 11. is there. A tilling shaft support portion 1B is integrally formed in a bulging shape on the lower end side of the transmission case 1, and the tilling shafts 14L and 14R protrude from the support portion 1B to the left and right and are supported in a substantially horizontal state. The rotation of the transmission shaft 11 is configured such that the tilling shafts 14L and 14R are decelerated and interlocked by meshing between the worm wheel 15a and the gear 15b.

  Thus, the cylinder 2a of the engine 2 has a relationship of being deviated forward with respect to the longitudinal axis (b) of the transmission shaft 11 in the side view of the fuselage, while the tillage is also in the side view of the fuselage. The vertical line (A) passing through the shafts 14L, 14R has a relationship of being deviated (C) backward from the longitudinal axis (B) of the transmission shaft 11.

  16L, 16R ... are cylindrical bosses fitted to the tilling shafts 14L, 14R from the outside and fixed to the tilling shafts 14L, 14R with detachable pins. Install…. The tilling claws 17, 17... Are detachably fixed to the plate body 18 fixed to the cylindrical bosses 16L, 16R with bolts and nuts.

  Reference numeral 20 denotes a working machine frame which is provided in a pair of left and right sides and whose front side is bifurcated and each front end is attached and fixed to the upper end side of the transmission case 1 and the tilling shaft support 1b. The handle frame 21, the twin tail wheel 22, and the erecting device 23 are attached in this order from the front side of the part that extends. Note that the mounting cylinder 24 of the setting device 23 is also used as a hitch for mounting the resistance rod 25.

  The handle frame 21 includes a base frame portion 21a having a rectangular cross section and an upper frame portion 21b having a circular cross section having a grip portion. Of these, the base frame portion 21a is sandwiched between the work machine frames 20 so as to extend rearward and upward. It is tilted and attached. The lower end of the upper frame portion 21b is configured to be fitted into the upper end opening of the base frame portion 21a so that the amount of insertion can be adjusted by the fixture 21c. A suspension handle 26 extending above the engine 2 is provided near the upper end of the base frame portion 21a.

  On the front side of the erecting device 23, a twin tail wheel 22 is rotatable around a support shaft 30 that supports the arm portion 22a, and the body moving posture (d), the inverted posture (e), and the intermediate working posture ( F) is provided so that the locking arm 22b is connected and fixed by the pin 32 together with the locking holes 31, 31... Provided on the work machine frame 20 side.

35 is a cover member that is fastened to the flange portion 1A of the transmission case 1 and mainly covers the top surfaces of the tilling claws 17, 17.
When performing the uprighting work, as shown in FIGS. 1 and 4, in the work machine frame 20, the twin tail wheel 22 is assembled in the inverted posture (e), and the upright 23 is assembled in the working posture. When the engine 2 is started, the rotation of the crankshaft 2b is transmitted through the bevel gear mechanism transmission shafts 12a and 12b, the centrifugal clutch 13 and the like, and the tilling shafts 14L and 14R rotate through the reduction mechanism of the lower worm wheel 15a and the gear 15b. Then, the tilling claws 17, 17... Advance the machine body while performing the tilling work with the down cut through the cylindrical bosses 16 </ b> L, 16 </ b> R, and form the straw with the rear stand 23. It is possible to perform the tilling work satisfactorily without advancing unexpectedly even if the resistance bar 25 is not involved even if the resistance rod 25 is given by the treader 23.

  As described above, the cylinder 2a of the engine 2 has a relationship of being deviated forward with respect to the longitudinal axis (b) of the transmission shaft 11 in the side view of the body, while the tillage shaft 14L in the side view of the body. , 14R passing through the vertical axis (b) of the transmission shaft 11 is offset (c) rearward with respect to the longitudinal axis (b) of the transmission shaft 11, so that the tilling shafts 14L, 14R The transmission case 1 and the cylinder head 2a of the engine 2 are located on the front side with respect to the vertical line (b) passing through. Accordingly, even when the work implement frame 20 is mounted with the erecting device 23, the load on the front side becomes large due to the loads of the transmission case 1 and the engine 2, and the load on the rear erecting device 23 is combined. Since it acts on the tilling shafts 14L, 14R, the body tractive force increases.

Since the twin tail wheel 22 can be cultivated or erected while being mounted on the airframe in an inverted posture, a further load is applied to the cultivating shafts 14L and 14R to improve the traction force.
The twin tail wheel 22 at the sign (d) position indicates a state when the aircraft is moving. When the twin tail wheel 22 is fixed in the moving posture and the engine 2 is started, the tilling shafts 14L, 14R rotate and the aircraft moves forward by the rotating action of the outer tilling claws 17, 17,. Is grounded and bears the load. Further, in this example, the tilling work is performed with a resistance action by the resistance rod 25, but the twin tail wheel 22 is provided so as to be able to be held in a substantially horizontal posture (f). Therefore, it is possible to prevent the rear tilting and to prevent the resistance action caused by the excessive resistance rod 25, and to perform proper tillage work.

  FIG. 6 shows the state of the airframe in a rollover state. The airframe is configured such that the left and right width W1 at the rear end portion of the handle frame 21 and the width W2 of the cover member 27 are substantially the same width, and preferably W2 is slightly narrower. Further, the twin tail wheel 22 and the tilling shafts 14L, 14R are arranged so as to be within a line segment (near the center of the machine body) connecting the outermost point of the handle frame 21 and the outermost point of the cover member 35.

By configuring in this way, when the aircraft is placed on its side, it can be supported by the handle 21 and the cover member 27, and the installation area can be reduced when the vehicle is loaded and transported.
FIG. 7 shows another embodiment, in which the crankshaft 39b of the engine 39 is provided in the vertical direction, and the cylinder 39a is reversely arranged with respect to the prior art. Therefore, the cylinder 39a is configured to be deviated forward with respect to the axis of the transmission shaft 11, and similarly to the above embodiment, the cylinder 39a of the engine 39 has the transmission shaft 11 in the side view of the fuselage. The vertical line (b) passing through the tillage shafts 14L and 14R in the side view of the body is the vertical axis (b) of the transmission shaft 11 in a relationship of being deviated forward with respect to the vertical axis (b). On the other hand, the same effect is obtained because of the relationship of being displaced (c) on the rear side.

  FIG. 8 shows another example of the work machine frame. The work machine frame 40 includes a machine body-side mounting portion 40a and a reversing portion 40b that is pivotable up and down with respect to the machine body-side mounting portion 40a. The reversing portion 40b has a working posture that is extended backward by a lock pin 41. Can be fixed. On the other hand, when the lock pin 41 is pulled out and turned upside down, it is in a state along the lower half of the handle frame 16 and receives the work implement support bar 23a protruding above the mounting cylinder 24 for mounting the work implement. The support rod 23a is fixed with the lock pin 41 by being fitted to the holder 42. If comprised in this way, the body can be moved without the effort which removes the erecting machine 23 one by one, and handling will become easy. 43 is a tension spring for assisting inversion.

Full side view with partial section Overall plan view Cross section of tillage device Partially enlarged side view Enlarged sectional view of the transmission shaft Overall plan view Overall side view showing another embodiment Side view showing work implement reversal configuration

DESCRIPTION OF SYMBOLS 1 Transmission case 2 Engine 11 Transmission shaft 14 Tilling shaft 20 Work machine frame 21 Handle frame 22 Twin tail wheel 23 Standing device 26 Suspension handle 30 Support shaft

Claims (1)

An engine (2) is arranged on the upper part of the vertically long transmission case (1), and a transmission shaft (11) that is rotationally interlocked by the engine (2) is provided inside the transmission case (1), and the transmission shaft is provided at the lower end side of the transmission case (1). A tiller shaft (14L, 14R) having a plurality of tillage claws (17, 17 ...) arranged on the outer periphery in conjunction with (11) is provided, and a work machine frame (20) to be mounted on the transmission case (1) portion is In the walking type tilling device, which is provided with a handle frame (21) which is mounted on the stand (23), and which is directed to the rear upper side of the machine body, the handle frame (21) is an upper frame portion which includes a base frame portion (21a) and a gripping portion. (21b) and the base frame portion (21a) is provided between the work machine frame (20) so as to be sandwiched between the left and right sides and inclined rearward and upward. The engine is located near the upper end of the base frame portion (21a). A suspension handle (26) extending above (2) is provided, and the cylinder part (2a) of the engine (2) is provided so as to have a forwardly inclined posture, whereby the cylinder part (2a) of the engine (2) is provided. ) Is deviated forward with respect to the longitudinal axis (b) of the transmission shaft (11) in the transmission case (1), and the tilling shaft (12) is located relative to the longitudinal axis (a). The transmission shaft (11) is linked to the crankshaft (2b) of the engine (2) via a bevel gear mechanism (12a, 12b), and the working machine frame (20 ), The twin tail wheel (22) is provided on the front side of the upright (23) so as to be rotatable around a support shaft (30) supporting the arm portion (22a), and reverse to the body movement posture (d). A walking type tillage device characterized by being fixed to a posture (e).

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