JP2008154537A - Maneuvering apparatus for walking-type tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maneuvering apparatus for a walking-type tiller which is easy to continually maneuver in an operator's posture with ease, with three components, i.e. a maneuvering handle, a clutch lever and a change lever, disposed in a rational relation. <P>SOLUTION: The maneuvering apparatus comprises a maneuvering handle (4) projecting out of the tiller's vehicle body (1) rearwardly upward and formed in a loop-fashion, when viewed from the top; a clutch lever (5) formed into a similar shape inside the maneuvering handle (4) and enabling the main clutch to be turned on/off by vertical control operations, that is, the clutch turns "on", when it is pushed down, while turning "off" at automatic returning, when the operator's hands are let go; and the change lever (9), enabling going forward/backward and a speed-changing position to be switched. In this maneuvering apparatus, with the maneuvering handle (4) set at a reference position, the clutch lever (5) is projected thereabove, and the change lever (9) is arranged front and above the clutch lever (5) and higher than the maneuvering handle (4). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an operating device for a walk-type tillage working machine.

Conventionally, for example, as disclosed in Patent Document 1, an operation handle protrudes rearward and upward from the vehicle body of the walking type tiller, and a clutch lever that engages and disengages the traveling clutch protrudes above the operation handle. A shift change lever is provided below the operation handle so as to project rearward from the vehicle body side.
JP 2006-6283 A

  In the conventional configuration, the clutch lever is protruded upward from the operation handle, so that the operation is easy. However, since the change lever for shifting is located below the operation handle, the operator bends the waist. It may be difficult to perform the change operation unless the operation handle located on the upper side gets in the way and must be lifted upwards. However, there is a problem that the work efficiency is lowered.

  In view of this point, the present invention is to implement an operating device that can be easily operated with a comfortable posture by arranging the operating handle, the clutch lever, and the change lever in a rational positional relationship.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention described in claim 1 includes an operation handle (4) projecting from the vehicle body (1) rearward and upward and formed in a loop shape in plan view, and substantially the same shape as this inside the operation handle. The main clutch can be turned on and off by turning it up and down, and the clutch lever (5) is automatically turned on when released and the clutch is automatically turned off when released. And a change lever (9) capable of switching the shift position, the operation handle (4) as a reference position, and a clutch lever (5) protruding from the upper side of the operation handle (4). The change lever (9) is arranged so as to be located above the handle (4).

  At the time of tillage work, it is operated while holding the operation handle (4) and pressing it downward, and at the time of turning, it turns while being lifted. When the clutch lever (5) is pushed down while holding the grip portion, the main clutch is turned “ON”, and when released, the clutch lever (5) is automatically returned to the clutch “OFF”. The change lever (9) can switch and change the forward / backward movement and the shift position by operation in the vertical and horizontal directions from the upper position of the operation handle.

Since the change lever (9) is disposed above the operation handle (4), it is not necessary to bend the waist and operate it, and the change lever (9) can be operated in an easy posture.
According to a second aspect of the present invention, in the first aspect, the clutch lever (5) is overlapped with the operation handle (4) in a plan view when the clutch lever (5) is pushed down to the clutch "on" position to hold both of them. A bendable relief portion (5a) that can be grasped only by an operation handle is provided at one side of the clutch lever (5).

  When the clutch lever (5) is pushed downward to make the clutch "ON", the clutch lever overlaps with the operation handle (4) and can be operated with both hands held at the same time. Then, the clutch lever (5) can be operated with only the operation handle held by the bent relief portion (5a).

  According to the first aspect of the present invention, the lower lever operating handle is used as a reference position, the clutch lever 5 is disposed at the upper position, and the change lever 9 is disposed at the upper position. It can be easily operated with an easy posture, operability is improved, and work efficiency can be increased.

  According to the second aspect of the present invention, the clutch lever 5 is overlapped with the lower operation handle 4 when the clutch lever 5 is pushed downward to make the clutch “ON” while achieving the effect of the first aspect. Therefore, it is possible to operate with one hand holding the clutch lever 5 and the operation handle 4 at the same time, and with the other hand, the operation handle is provided by the presence of the bending relief 5a provided on one side of the clutch lever 5. Since it is possible to operate by gripping only 4, the operation of the machine body becomes easier, and the safety by the clutch lever 5 can be further ensured.

An embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a self-propelled walking type tiller. A mission case 3 supporting left and right wheels 2 is arranged at the front and rear center of a car body 1 of this tiller. An engine E is mounted on the upper part of the mission case 3. ing. At the rear end of the mission case 2, a rotary working unit 17 having a tilling claw 16 is provided. The upper surface of the rotary working part 17 is covered with a rotary cover 18, and a resistance bar 19 whose vertical position can be adjusted is provided at the rear part of the rotary cover 18.

  The operation handle 4 protrudes obliquely upward from the mission case 2 and is formed in a loop shape in plan view. The clutch lever 5 is formed in a loop shape that is substantially the same shape as the handle 4 in a plan view on the inner side of the rear portion of the operation handle 4, and protrudes rearward and upward. It is pivotally supported. The clutch lever 5 can be turned on and off by turning up and down around the horizontal axis 6. When the clutch lever 5 is pushed down, the clutch lever 5 overlaps with the grip portion of the operation handle 4 to become the on / off clutch. When the hand is released from 5, the main clutch part that interrupts the rotational power from the engine is automatically interlocked via an interlocking mechanism such as a clutch wire 7 so as to automatically return to the clutch “disengaged”. The clutch lever 5 is configured to overlap the handle 4 in a plan view when the clutch lever 5 is rotated downward, and to be able to hold both the handle 4 and the clutch lever 5 simultaneously (with the left hand in the embodiment). Yes. A bending relief portion 5a that is spaced forward from the grip portion of the operation handle 4 is provided at one side (right side in the embodiment) of the clutch lever 5, and the right portion of the operation handle 4 is moved by the right hand. Only 4 can be gripped and operated.

  The change lever 9 is provided through a change lever guide plate 10 provided in the upper part of the transmission case 2, and extends rearward and upward above the operation handle 4. The change lever 9 is rotatable about the vertical axis P in the vertical direction and the horizontal axis Q in the horizontal direction, and the shifter arm 11 provided on the base side is moved in the horizontal direction. As shown in FIG. 5, when the change lever 9 is positioned at the upper edge 12a of the change guide groove 12, the shifter arm 11 is engaged with the lower shift rod 13, and as shown in FIG. When positioned at the lower edge 12d of the groove 12, the shifter arm 11 is engaged with the upper shift rod 14.

  As shown in the conventional example of FIG. 7, the boss 15 having a large outer diameter is attached to the shift rod 13 in order to reduce the stroke L2 as shown in FIG. By doing so, the stroke is reduced.

  FIGS. 9 and 10 show the forward / backward / shift pattern of the change lever guide. In FIG. 9, the guide groove has a J shape, and the change lever 9 is changed from the position a where the vertical groove is in the neutral position to the position of the upper horizontal groove b. Then, "reverse" is the rotary neutral (see FIG. 17), and at the position c, the "high speed" is moved forward at the second speed, and the rotary is neutral (see FIG. 13). At the position of the lower horizontal groove d, it moves forward at the “low speed” at the first speed, and is set to the rotary neutral (see FIG. 14). Further, at the position of the lower horizontal groove e, it moves forward at “low speed”, and the rotary rotates normally (see FIG. 15). Further, in FIG. 10, the guide groove has a machined shape in addition to the J shape, and when it is changed to the lower lateral groove f position, it moves forward at “low speed”, and the rotary rotates backward (stands up) (see FIG. 16). Yes.

  Rotational power from the output shaft of the engine E is transmitted to the main shaft 31 of the traveling transmission 30. The rotation of the main shaft 31 is transmitted to the travel drive sprocket 35 through the transmission path of the first drive gear G1, the gear G3 of the first countershaft 32, and the gear G5 of the travel drive shaft 34, and via the endless chain 36. It is transmitted to the left and right axles 37, 37. This transmission path is a traveling “high speed” movement (FIG. 13). Further, when switching to the traveling “low speed” by meshing of the gears G1, G10, G11, G5 and meshing the second drive gear G2 with the gear G6 of the second countershaft 33, the rotational power of the main shaft 31 is transmitted to the gear G7. The rotary working portion 17 is transmitted in the forward rotation direction via the rotary drive shaft 38, the rotary drive sprocket 39, and the endless chain 40 (FIG. 15). Further, when the first drive gear G1 is engaged with the gear G4 at the traveling "low speed", that is, at the low speed due to the engagement of the gears G1, G12, G11, G5, the rotary drive shaft 38 is moved via the gears G8, G9. It is set as the structure which rotates in a reverse direction and reverses a rotary working part (FIG. 16).

Side view of walking type tillage machine Side view of the main part Rear view of the main part Top view of the main part Side view of the main part Side view of the main part Side view of conventional example Side view of main parts of tillage work machine The front view which shows the forward / backward / shift pattern of a change lever guide. The front view which shows a back-and-forth advance / shift pattern same as the above. Development plan view of the transmission for traveling (travel / rotary “neutral”) Expansion plan view of the main part (travel / rotary “neutral”) Development plan of the main part (travel "high speed", rotary "neutral") Expansion plan view of the main parts (travel “low speed”, rotary “neutral”) Expansion plan view of the main part (travel “low speed”, rotary “forward rotation”) Expansion plan view of the main part (travel "low speed", rotary "reverse") Expanded plan view of the main parts (travel “reverse”, rotary “neutral”)

Explanation of symbols

1 Car body (cultivation machine)
4 Operation handle 5 Clutch lever 5a Bend relief 6 Horizontal axis 9 Change lever

Claims (2)

  An operation handle (4) that protrudes rearward and upward from the vehicle body (1) and is formed in a loop shape in plan view, and is formed in substantially the same shape inside this operation handle, and can be rotated in the vertical direction. The main clutch can be turned on and off, and the clutch lever (5) is automatically turned on when the clutch is released when pressed down, and the clutch lever (5) that is automatically turned off when released, and a change lever that can switch between forward and backward movements and shift positions. (9), with the operation handle (4) as a reference position, and a clutch lever (5) protruding from the upper side of the operation handle (4). An operation device for a walk-type tillage working machine, characterized in that a change lever (9) is arranged.   The clutch lever (5) is configured to be able to be gripped by being overlapped with the operation handle (4) in a plan view when the clutch lever (5) is pushed down to the clutch "on" position, and the clutch lever (5) The operating device for a walk-type tillage work machine according to claim 1, wherein a bending relief portion (5a) that can be gripped only by an operation handle is provided at one side position of the plow.

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