JP2017201934A - Walking-type working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking-type working machine in which it is desired to reduce a risk of moving traveling suppression when a rotary tilling device is driven in a reversed state, while satisfactorily providing resistance in moving traveling when a tilling depth is adjusted and the rotary tilling device is driven in a normal rotation state.SOLUTION: A walking-type working machine includes a traveling machine body 1 with a traveling wheel 5, a rotary tilling device 2 positioned in the rear of the traveling machine body 1, and a grounding body 18 constituted of a rod-like member and having a relative height to the ground supported in a position changeable manner along the direction to be changed. The grounding body 18 is provided so as to be positioned between the traveling wheel and the rotary tilling device 2 in a machine body side view, and be grounded to the ground before being tilled with the rotary tilling device 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a walking work machine having a rotary tiller at the rear of a traveling machine body having traveling wheels.

  Conventionally, an elongated rod-shaped grounding body has been provided in a state of extending in the vertical direction and in a state of being positioned on the rear side of the rotary tiller (see, for example, Patent Document 1). The grounding body has a function of changing the relative height with respect to the rotary cultivator to adjust the cultivating depth by the rotary cultivator, or contacting the ground to give resistance to traveling. If it adds explanation, at the time of tillage work, drive reaction force will act so that it may go to the front side with rotation drive of a rotary tillage device. As a result, the driving reaction force by the rotary tiller is applied to the driving force by the traveling wheel, the traveling machine body is increased more than the driving speed of the traveling wheel, and it may be difficult to perform the steering operation. Therefore, when the grounding body is in contact with the ground, it is possible to provide resistance to traveling and suppress the forward movement speed.

Japanese Patent Application Laid-Open No. 2012-15

  Some rotary tillers can be switched not only to a normal rotation state in which rotation is driven in the same direction as the rotation direction of the traveling wheel, but also to a reverse rotation state in which rotation is driven in the opposite direction. When the rotary tiller is driven in the forward rotation state, the grounding body can moderately provide resistance to traveling and suppress the moving speed. However, when the rotary tiller is driven in the reverse rotation state, the driving reaction force accompanying the rotational drive of the rotary tiller during the tilling work is in the direction opposite to the machine body moving direction. When the driving reaction force acts in the direction opposite to the airframe movement direction in this manner, the traveling airframe is prevented from moving forward, and the rotary tiller is likely to sink downward.

  In the above conventional configuration, since the grounding body acts on the soft ground after being cultivated by the rotary tiller, when the rotary tiller sinks, the grounding body acts on the ground after being cultivated. As a result, the plowing depth becomes deeper and the grounding body bites into the ground, increasing the resistance to traveling, and the aircraft may not be able to move smoothly.

  Therefore, it is possible to adjust the tilling depth and to provide good resistance to traveling when the rotary tiller is driven in the normal rotation state, and to move when the rotary tiller is driven in the reverse state. It has been desired to reduce the risk of being suppressed.

The characteristic configuration of the walking type working machine according to the present invention includes a traveling machine body having traveling wheels, a rotary tiller device located at the rear of the traveling machine body, and a grounding body that contacts the ground,
The grounding body is located between the traveling wheel and the rotary tiller when viewed from the side of the body, and is in contact with the ground before being cultivated by the rotary tiller.

  According to the present invention, since the grounding body contacts the ground before being cultivated by the rotary tiller, that is, the uncultivated land, the rotary tiller can be changed by changing the relative height of the grounding body with respect to the rotary tiller. Even when working in either the forward rotation state or the reverse rotation state, it is possible to appropriately adjust the tilling depth by the rotary tiller during the tilling operation.

  When working with the rotary tiller in the normal rotation state, when the grounding body contacts the uncultivated land, the operator can give resistance to traveling by lowering the grounding body slightly downward. it can. In addition, when working with the rotary tiller in the reverse rotation state, even if the drive reaction force acts in the direction opposite to the moving direction of the machine and the rotary tiller tries to sink deeply, the grounding body touches the uncultivated land. Further, it is possible to suppress further sinking and to avoid resistance to traveling.

  Therefore, it is possible to adjust the plowing depth and to provide good resistance to traveling when the rotary tiller is driven in the forward rotation state, while moving traveling when the rotary tiller is driven in the reverse state. It has become possible to reduce the risk of being suppressed.

  In the present invention, it is preferable that the grounding action part in contact with the ground in the grounding body is provided in an inclined posture that is located on the upper side toward the front side of the body.

  According to this configuration, when the traveling machine body travels forward in a state where the grounding action unit is in contact with the ground, it is slidably guided by the inclined conveyance surface. Since the grounding action part is provided in an inclined posture located on the upper side toward the front side of the aircraft, for example, even if there is a convex part on the ground, the grounding action part can ride on the convex part and pass smoothly. There is little risk of getting stuck in the convex part and hindering running.

  In the present invention, the grounding body is constituted by a rod-shaped member and is supported by the traveling machine body so that the position of the grounding action part can be changed along the direction in which the relative height of the grounding action part is changed. It is preferable to have

  As a mechanism for supporting the grounding body so that the position of the grounding body can be changed, for example, a mechanism for position adjustment may be provided as a separate structure different from the grounding body. Such a configuration has a disadvantage that the number of parts is large and the structure is complicated.

  On the other hand, according to this structure, since the position adjustment part is provided in the grounding body, a mechanism for position adjustment can be provided with a simple structure by sharing the member.

  In the present invention, it is preferable that the grounding body is provided within the tillage width of the rotary tiller and on the front side of the rotary tiller.

  According to this configuration, since the passing trace formed on the ground after the grounding body has passed is leveled and erased by the tilling work by the rotary tiller, the work trace becomes a beautiful finish.

It is the whole walk type work machine side view. It is a whole top view of a walk type work machine. It is a side view of a grounding body arrangement | positioning part.

  Hereinafter, an embodiment of a walking type working machine according to the present invention will be described with reference to the drawings.

〔overall structure〕
As shown in FIGS. 1 and 2, a walking work machine is configured with a rotary tiller 2 at the rear of the traveling machine body 1. The traveling machine body 1 is connected to a transmission case 3 also serving as a machine body frame, a pair of left and right traveling wheels 5 connected to left and right axles 4 provided at a lower portion of the transmission case 3, and a front part of the transmission case 3. A support frame 6 and an engine 7 supported by the support frame 6 are provided. The transmission case 3 includes a traveling transmission unit 3A and a working transmission unit 3B extending obliquely rearward and downward from the upper part of the traveling transmission unit 3A. The power of the engine 7 is transmitted from the output shaft 8 of the engine 7 to the input shaft 10 of the traveling transmission unit 3A via the belt transmission mechanism 9.

  A steering handle 11 extends obliquely rearward and upward from a middle portion of the transmission case 3. The rotary power tiller 2 is provided in the work transmission section 3B of the transmission case 3. As shown in FIGS. 1 and 2, the rotary tiller 2 includes a drive shaft 12 extending right and left from the lower part of the transmission case 3, and a plurality of tilling claws 13 fixed to the right and left drive shafts 12. , A rotary cover 14 covering the top of the tilling claw 13, a receiving plate 15, a leveling plate 16, and the like connected to the rear end portion of the rotary cover 14. The right and left drive shafts 12 and the tilling claws 13 are normally rotationally driven in the forward rotation direction (the direction of arrow A1 in FIG. 1). Further, the drive shaft 12 and the tilling claw 13 can also be rotationally driven in the reverse direction (the direction of the arrow A2 in FIG. 1).

  As shown in FIG. 2, the rotary cover 14 is configured by connecting a fan-shaped lateral wall portion 14 b to the right and left sides of the semicylindrical ceiling portion 14 a, and driving the upper, right and left sides of the transmission case 3. The upper part of the shaft 12 and the tilling claw 13 is covered, and the rotary cover 14 (ceiling part 14a) is connected to the transmission case 3.

  The receiving plate 15 is formed in a rectangular shape, and is configured by a flexible rubber plate or the like. The lateral width of the receiving plate 15 is set to be approximately the same as the lateral width of the rotary cover 14. The leveling plate 16 is disposed so as to overlap the rear of the receiving plate 15. The leveling plate 16 is formed in a rectangular shape and is made of a metal material.

  A lower end portion of the leveling plate 16 is bent forward, and a serrated leveling portion 17 is formed at the lower end portion of the leveling plate 16. In the state shown in FIG. 1, the leveling portion 17 is positioned below the lower end of the receiving plate 15.

[Grounding body]
As shown in FIGS. 1, 2, and 3, there is provided a grounding body 18 that is configured by a rod-like member and is supported so that its position can be changed along the direction in which the relative height with respect to the ground changes. The grounding body 18 is located between the traveling wheel 5 and the rotary tiller 2 in a side view of the machine body, and is provided in a state of being in contact with the ground (uncultivated land) before being cultivated by the rotary tiller 2. . As shown in FIG. 2, the grounding body 18 is provided within the tillage width of the rotary tiller 2 and on the front side of the rotary tiller 2.

  The grounding body 18 is constituted by a rectangular bar-like member having a long and narrow cross section, and a grounding action portion 18a that is in contact with the ground is provided at a lower portion thereof. That is, as shown in FIG. 3, the grounding body 18 is provided in an inclined posture that is located on the rear side of the aircraft toward the upper side, and is bent so that the lower end of the grounding body 18 is substantially L-shaped in a side view. A grounding action portion 18a is formed extending rearward. A flat grounding body 19 having a substantially L-shaped cross section and wider than the grounding body 18 is provided in a fixed state on the grounding action portion 18a. The grounding action part 18a is provided in an inclined posture located on the upper side toward the front side of the body.

Next, a support structure for the grounding body 18 will be described.
A bracket 20 is fixed to the left side of the transmission case 3 at a location located between the traveling wheel 5 and the rotary tiller 2 in a side view of the machine body. A rectangular cylindrical tubular support member 21 that is wide in the front-rear direction and narrow in the left-right direction is fixed to the bracket 20. The cylindrical support member 21 is provided in a state of being inserted in the vertical direction through an opening of the wheel cover 22 that covers the upper side of the traveling wheel 5, and is provided in a state of protruding upward from the wheel cover 22. On the left side surface of the cylindrical support member 21, a lock bolt 23 with an operation lever for fixing the grounding body 18 to the cylindrical support member 21 is provided.

  The grounding body 18 includes a position adjusting unit 18b that is supported by the traveling machine body 1 so that the position thereof can be changed along the direction in which the relative height of the grounding action unit 18a with respect to the ground changes. That is, as shown in FIG. 3, an upper side portion that extends linearly along the vertical direction in the grounding body 18 is configured as a position adjusting portion 18 b, and the position adjusting portion 18 b is laterally spaced in the vertical direction. A plurality of adjustment holes 24 are formed so as to be inserted in the direction.

  When the grounding action part 18a of the grounding body 18 contacts the field (uncultivated land), the height of the rotary tiller 2 with respect to the field, that is, the tilling depth is determined. More specifically, the position adjusting portion 18b of the grounding body 18 is inserted and inserted into the cylindrical support member 21 from below, and the lock bolt 23 is screwed into one of the plurality of adjustment holes 24. To fix the grounding body 18. For example, when the plowing depth of the rotary tiller 2 is set to be deep, after the lock bolt 23 is turned and removed, the grounding body 18 is moved upward, and the lock bolt 23 is moved below the grounding body 18. It is attached to the adjustment hole 24 located. Thereby, since the height of the grounding body 18 (grounding action part 18a) with respect to the rotary tiller 2 is changed to a high position, the tilling depth of the rotary tiller 2 is set deeper. On the other hand, when the plowing depth of the rotary tiller 2 is reduced, after the lock bolt 23 is removed, the grounding body 18 is moved downward, and the lock bolt 23 is positioned at the upper portion of the grounding body 18. The grounding body 18 is fixed by attaching to the ground.

  The right and left drive shafts 12 and the tilling claws 13 are moved forward in the forward rotation direction (the direction of the arrow A1 in FIG. 1), so that the tilling work in the forward rotation state is performed. As the machine moves forward, the rotary tiller 2 rotates and drives the right and left drive shafts 12 and the tilling claws 13 in the normal rotation direction (the direction of the arrow A1 in FIG. 1). The ground is leveled by the leveling portion 17 at the lower end portion of the leveling plate 16.

  When the grounding action part 18a of the grounding body 18 contacts the uncultivated land, the rotary tiller 2 cannot be lowered any further, and the working depth at that time is set as the tilling depth. In addition, when working in the forward rotation state, the grounding body 18 touches the field scene by pushing down the steering handle 11 slightly, so that resistance to traveling can be given.

  By advancing the right and left drive shafts 12 and the tilling claws 13 while being rotationally driven in the reverse direction (the direction of the arrow A2 in FIG. 1), the tilling work in the reverse state can be performed. When working in a reverse state, the rotary tiller 2 reverses in the direction opposite to the direction of rotation of the traveling wheel 5 to exert a force to sink into the ground, but the grounding body 18 contacts the uncultivated land. By doing so, further sinking can be suppressed.

[Another embodiment]
(1) In the above-described embodiment, the grounding body 18 is provided in an inclined posture that is positioned closer to the rear side of the machine body toward the upper side, but instead of this configuration, the grounding body 18 extends vertically along the vertical direction. It is good also as a structure provided in an upright posture.

(2) In the above embodiment, the grounding body 18 is provided in a state of being located within the tillage width of the rotary tiller 2, but instead of this configuration, the grounding body 18 is the tillage width of the rotary tiller 2. It is good also as a structure provided in the position which remove | deviated with respect to the horizontal direction.

(3) In the above-described embodiment, the grounding action part 18a in contact with the ground in the grounding body 18 is configured to be provided in an inclined posture located on the upper side toward the front side of the body. Various configurations such as a configuration in which the contact surface is provided in a horizontal posture or a configuration in which the contact surface is provided in a spherical shape can be implemented.

(4) In the above embodiment, the grounding body 18 includes the position adjusting unit 18b. However, instead of this configuration, a dedicated position adjustment mechanism for changing the position of the grounding body 18 is the grounding body 18. It may be configured by a separate member.

(5) In the above-described embodiment, the grounding body 18 is constituted by a rectangular bar-shaped member. However, various forms such as a rectangular cylindrical member, a round bar member, a round cylindrical member, a member having a triangular cross section, etc. The rod-shaped member can be used.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a walking work machine having a rotary tiller at the rear part of a traveling machine body.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Rotary plowing device 5 Traveling wheel 18 Grounding body 18a Grounding action part 18b Position adjustment part

Claims (4)

A traveling machine body provided with traveling wheels, a rotary tiller device located at the rear of the traveling machine body, and a grounding body that contacts the ground,
The grounding body is located between the traveling wheel and the rotary tiller when viewed from the side of the body, and contacts the ground before being cultivated by the rotary tiller.   The walking type work machine according to claim 1, wherein the grounding action part in contact with the ground in the grounding body is provided in an inclined posture located on the upper side toward the front side of the machine body.   The grounding body is configured by a rod-shaped member, and further includes a position adjustment unit that is supported by the traveling machine body so that the position of the grounding action unit can be changed along the direction in which the relative height of the grounding action unit to the ground changes. Item 3. The walking work machine according to Item 2.   The walk type work machine according to any one of claims 1 to 3, wherein the grounding body is provided within a tillage width of the rotary tiller and on a front side of the rotary tiller.

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