JPH0984430A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve grass-reaping operation efficiency by readily and rapidly changing effective reaping width of a tilting surface reaping device according to the length and conditions of a tilting surface ranging at one side end of traveling road surface. SOLUTION: In this mower provided with a tilting surface reaping device 3 for reaping grass on a tilting surface ranging to one side end of a traveling load surface on the lateral side of a traveling machine body, a pair of vertically superposed blade bodies 20 and 21 and a blade body-driving part 22 for relatively transversely reciprocating and sliding both the blade bodies 20 and 21 and clipping and cutting the grass are provided to constitute the tilting surface reaping device 3 and the blade body driving part 22 is constituted so as to be in a position-fixed state and so as to be connectable and disconnectable to both the blade bodies 20 and 21, and plural coupling parts of both the blade bodies 20 and 21 to the blade body driving part 22 are provided to constitute both the blade bodies 20 and 21 so as to enable control of change in the position in the reaping width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grass mower equipped with a slope cutting device for cutting grass on a slope which is connected to one side end of a traveling road surface on the side of a traveling machine body.

[0002]

2. Description of the Related Art Conventionally, as a grass mower as described above, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-95229, a slope cutting device provided on the lateral side of a traveling machine body is provided by a rotary blade. In addition to being configured as a rotary type that performs impact cutting, it supports the angle changeable in the forward direction in the left-right direction,
There was one that allowed the cutting width of the slope to be changed.

[0003]

However, according to the above-mentioned conventional structure, since the slope cutting device is constituted by the rotary type, the device becomes large in size and heavy, and the weight balance is deteriorated, resulting in poor maneuverability. There was a problem in terms.

Further, since the slope harvesting device is supported so as to be adjustable in angle in the forward direction in the left-right direction,
When changing the cutting width of the slope, if there is an obstacle such as a standing tree in front of the slope cutting device, the traveling machine body must be retracted once and then the angle must be adjusted to adjust the work efficiency. There was room for improvement.

An object of the present invention is to improve the maneuverability and to easily and quickly change the effective cutting width of the slope cutting device.

[0006]

[Means for Solving the Problems]

[Configuration] The characteristic configuration of the present invention is, in the mower described at the beginning, a pair of blade bodies that are vertically stacked, and a blade body drive unit that relatively laterally reciprocally slides both blade bodies to perform scissor cutting. And the slope trimming device is provided, the blade driving unit is fixed in position, and is configured to be connectable to and disconnectable from both blades, and the connecting unit of both blades to the blade driving unit. A plurality of blades are provided so that the position of both blades can be changed and adjusted in the cutting width direction.

[Operation] According to the above configuration, [a] a blade for cutting the slope cutting device by scissors cutting a pair of blades that are vertically overlapped with each other and both blades relatively sliding back and forth laterally. Since the reciprocating structure is provided by providing the body drive section, the slope cutting device can be made smaller and lighter than the rotary type structure, and the weight balance can be prevented from being lost. it can.

[B] By adjusting the positions of both blades of the slope cutting device in the cutting width direction, the effective cutting width of the slope cutting device can be adjusted according to the length and condition of the slope connected to one side end of the road surface. Since it is possible to change the cutting width of the slope, even if there is an obstacle such as a standing tree immediately before the slope cutting device when changing the cutting width of the slope, The slope cutting device can be repositioned and adjusted at that position without having to retract it.

[C] In the case of the above [B], since the blade body drive unit is in the position-fixed state and only the two blade bodies are positionally changed and adjusted in the cutting width direction, for example, the blade body drive unit is integrally positioned. Compared to the case of changing and adjusting, the force required for changing the position can be small, and further, the displacement of the center of gravity of the slope harvesting device can be reduced.

[Effect] Therefore, by the action [a],
It is possible to improve maneuverability, and by the action (B), it is possible to easily and speedily change the effective cutting width of the slope cutting device according to the length of the slope connected to one side end of the road surface. Therefore, it is possible to improve the efficiency of mowing work, and by the action [C], it is possible to easily perform the position change adjustment operation of the slope cutting device and prevent the deterioration of maneuverability. became.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall structure of a mower according to the present invention. This mower comprises a walking-controlled traveling machine body 1, a flat surface mowing device 2 provided in front of the traveling machine body 1 so as to mow grass on a traveling road surface, and a grass on a slope connected to one side end of the traveling road surface. And a slope harvesting device 3 provided on the lateral side of the traveling machine body 1 so as to harvest.

The traveling machine body 1 includes a machine body frame 5 made of a steel pipe material which is bent and formed so as to integrally include a steering handle 4 and extends from a lower front portion of the machine body toward a rear upper portion of the machine body, and a machine body frame 5 Engine 6 supported and connected to
And a pair of left and right traveling wheels 9 axially supported by the extended end of the mission case 7 and the transmission case 7 connected to the engine 6 via the tension clutch C.

A first support rod 10 for supporting the plane harvesting device 2 is provided on the front portion of the machine body frame 5 so as to extend toward the front of the machine body, and its extended end is aligned with the traveling wheels 9 in the front-rear direction. Auxiliary wheels 11 are pivotally supported.

As shown in FIGS. 2 and 3, the slope harvesting device 3
Support box 1 for supporting the cutting position in the cutting width direction
4 is pivotally supported on the front left side of the body frame 5 so as to be swingable left and right through a third supporting rod 13 facing forward and backward, and posture holding means (not shown) is provided to tilt the body 4 in the front-back direction. Is configured so that it can be changed and adjusted according to the inclination angle of the slope. Further, it is pivotally supported in a swingable manner back and forth through a second support rod 12 oriented in the left-right direction, and is provided with posture holding means (not shown) to provide a working posture and a storage posture in which the upper end portion is tilted backward (see FIG. 2). (Indicated by a chain double-dashed line).

As shown in FIGS. 2 and 12, the plane cutting device 2 includes a rotary blade 16 which is rotationally driven about an axis of a vertical axis by an engine 6 via the tension clutch C, a belt type transmission device 35, and the like. The rotary type blade is configured to perform impact cutting with a mower housing 17 or the like covering the upper portion of the rotary blade 16.

The slope harvesting device 3 is shown in FIGS.
As shown in, a pair of upper and lower pressing plates 18, 19, a pair of upper and lower blades 20, 21 held by the pair of upper and lower pressing plates 18, 19, and a pair of upper and lower blades 20 via a cam mechanism 26. The second hydraulic motor 22 (an example of a blade driving unit) that laterally reciprocates 21 with a constant stroke is configured as a reciprocating type that performs scissor cutting.
The size and weight of the slope harvesting device 3 are reduced.

Each of the pair of upper and lower blades 20, 21 is
A plurality of mountain-shaped blade portions 20a, 21 in plan view in the cutting width direction
a is made of a flat steel material formed in a state of being lined up at a predetermined interval. A plurality of elongated holes 20b, 21b for inserting bolts are arranged in each of the pair of upper and lower blade bodies 20, 21 at a predetermined interval which is set to be larger than the interval between the blade portions 20a, 21a in the cutting width direction. Has been drilled. On the other hand, each of the pair of upper and lower pressing plates 18, 19 is
A plurality of common holes for inserting bolts are provided in the blade body 2 in the cutting width direction.
The long holes 20b and 21b of 0 and 21 are formed so as to be arranged at a predetermined interval which is set to the same interval. Blade 2
A spacer 24 is interposed between the elongated holes 20 b and 21 b of 0 and 21 and the bolt 23.

That is, the bolt 23 is attached to the pressing plates 18, 19
After passing through the common hole and the long holes 20b and 21b of the blades 20 and 21, the nut 25 is screwed and tightened to allow relative horizontal reciprocal movement of the pair of upper and lower blades 20 and 21. However, the pair of upper and lower pressing plates 18 and 19 can prevent the blades 20 and 21 from rising.

As shown in FIGS. 8 and 9, the double-edged bodies 20, 2
1 is provided with a position shift prevention mechanism 58 for preventing the position shift between the two blade bodies 20, 21. This misalignment prevention mechanism 58 is provided on the lower pressing plate 19 with the support bracket 5
9 is provided, and the swing arm 60 is supported by the support bracket 59.
Is swingably supported around an axis extending along the width direction of both blades 20 and 21, and is provided in elongated holes 60a formed at both swing ends of the swing arm 60 on both sides of the blades 20 and 21. A pair of pins 61 protruding from the bracket 66 are engaged separately from each other.

As shown in FIG. 6, the second hydraulic motor 2
2 is integrally provided on the upper portion 33a of the cam case 33,
In the housing 50 integrally connected to the support box 14,
The second hydraulic motor 22 and the cam mechanism 26 are connected to the double-edged bodies 20, 2
1 is stored in a fixed position in the longitudinal direction.

As shown in FIG. 5, the cam mechanism 26 includes a first eccentric cam 29, a second eccentric cam 30, and a first eccentric cam that are integrally rotatably connected to the output shaft 22a of the second hydraulic motor 22. The first link 31 and the second eccentric cam 30 that are fitted to the cam 29 so as to be rotatable relative to each other and that are engaged and connected to the notch-shaped engaging portion 49 (corresponding to a connecting portion) of the upper blade body 20. It is configured by a second link 32 or the like that is fitted to the outer peripheral portion so as to be relatively rotatable and is connected to the notch-shaped engaging portion 49 of the lower blade body 21. First eccentric cam 29 and second eccentric cam 30
The output shaft 22 so that their phases are different from each other by 180 °.
The first and second links 31 and 32, which are connected to a, are guided by guide holes 33c in the side wall of the cam case 33 so as to reciprocate in the directions along the blade bodies 20 and 21. With the above configuration, the slope harvesting device 3 includes the pair of upper and lower blades 2
Scissors are cut by relative horizontal reciprocating movement of 0 and 21.

As shown in FIGS. 5 and 6, the second hydraulic motor 22 and the cam mechanism 26 are configured to be connectable to and disconnectable from the blade bodies 20 and 21, and the notch-like engaging portion 49 is provided. A large number of blades 20 and 21 are provided at a predetermined pitch in the longitudinal direction, and a position adjusting mechanism B for changing the positions of the blades 20 and 21 in the cutting width direction is provided.
The effective cutting width h (see FIG. 1) of the slope harvesting device 3 is determined by the operation of the length of the slope connected to one side end of the road surface, and there are obstacles such as standing trees in front of the slope harvesting device 3. It is configured so that it can be changed easily and quickly according to the situation.

That is, the cam case 33 is supported by the guide rail 51 attached to the housing 50 so as to be slidable and retractable in the width direction of the blades 20 and 21, and the slide movement operation portion 52 is operated to move the cam case 33 to the double blades. The first and second links 31, 3 are brought closer to the body 20, 21 side
A connecting state in which the connecting end portion of 2 is engaged with the engaging portion 49;
The blades 20 and 21 are separated from each other and can be switched to a non-connected state in which the connecting end is disengaged from the engaging portion 49. In order to configure the position adjusting mechanism B, a second electric motor 37 is provided in the housing 50, and the lower pressing plate 19 in the slope harvesting device 3 is provided with:
A large number of engaging holes 39 are formed as a rack that meshes with a pinion 38 that is integrally rotatably connected to the output shaft of the second electric motor 37. With such a configuration, the second electric motor 37 is driven to rotate in the forward and reverse directions in the unconnected state to change the positions of the blade bodies 20 and 21 to predetermined positions, and to connect the first and second links 31 and 32. The working end can be engaged with another engaging portion 49 corresponding to the predetermined position.

The slide movement operating portion 52 will be described. As shown in FIG. 6, the cam case 33 is provided between the support portion of the guide rail 51 and the cam case 33 so that the double-edged blade body 2 is provided.
The connecting rod 53 projecting from the back portion 33b of the cam case 33 is connected to the middle portion of the swing arm 54 in the longitudinal direction with the first spring 62 that presses and urges the swing arm in the direction of separating from 0, 21. The swing end of 54 is the first
A wire 55 that pulls against the urging force of the spring 62 to push the connecting rod 53 toward the blades 20 and 21 side.
And a wire operation lever 56 which is swingable back and forth and left and right is provided between the pair of left and right steering handles 4.

With this structure, when the operating lever 56 is tilted in one of the front and rear directions, the cam case 33 is pushed to both blade bodies 20 and 21 side against the urging force of the first spring 62, and the connected state is set (FIG. 6 state), the cam case 33 is separated from the blade bodies 20 and 21 by the urging force of the first spring 62, and is set in the non-coupling state. The guide case of the operation lever 56 is formed with a bent engaging portion for engaging the upper end portion of the lever that is tilted to the left or right side in the connected state. Further, between the flange 53a provided on the connecting rod 53 and the back portion 33b of the cam case 33, the contacting force between the connecting end portions of the first and second links 31 and 32 and the engaging portion 49 is within a predetermined range. A second spring 57, which is held therein, is interposed.

As shown in FIG. 6, a first limit switch 63 is provided in the housing 50 for detecting the unconnected state by the contact of the swing end of the swing arm 54. The second and third limit switches 64 and 6 with which the lever base end portions come into contact with each other when the left and right swing operation of 56 is performed.
5, the first, second and third limit switches 63, 6 are provided.
Based on the detection results of 4, 65, the second electric motor 3
7 is provided with a control device for rotating the control lever 56 forward and backward, and the operating lever 56 is tilted to the non-coupling state side.
When the swinging end portion of the control lever contacts the first limit switch 63 and the second electric motor 37 is set to the operable state, and is tilted to the left or right side as it is, the base end portion of the operating lever 56 is set to the second limit. The second electric motor 37 is brought into contact with the switch 64.
Is driven in the forward direction and is tilted to the other side, the base end portion comes into contact with the third limit switch 65 and the second electric motor 37 is driven in the reverse direction.

As shown in FIG. 11, inside the support box 14, a pair of upper and lower guide rollers 46, 46 for guiding both pressing plates 18, 19 in the longitudinal direction from the outer surface side are provided. The lower pressing plate 19 is formed with a concave portion having a U-shaped cross section into which the lower guide roller 46 is inserted.
Further, one side thereof is extended outward in the width direction with respect to the pair of upper and lower blade bodies 20, 21, and this extended portion is guided by an auxiliary guide roller 47 which rotates integrally with the upper guide roller 46. Configured.

As shown in FIGS. 2, 3 and 4, the blade bodies 20 and 2 are extended upward from the housing 50.
A rectangular tubular cover body 40 is provided to cover the non-shearing action parts 20A and 21A. As shown in FIG. 10, the cover body 40 can be slidably fitted into a housing 50 via an internal roller 48, and the position adjustment mechanism B operates to adjust the position of the slope cutting device 3 in the cutting width direction. Along with this, the housing 50 is configured to withdraw and retract (see FIG. 7).

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by this entry.

[Brief description of drawings]

FIG. 1 is a front view showing the overall configuration of a mower.

FIG. 2 is a side view showing the overall configuration of the mower.

FIG. 3 is a vertical sectional front view of the slope harvesting device.

FIG. 4 is a vertical sectional side view of a main part of the slope harvesting device.

FIG. 5 is a vertical sectional side view showing a cam mechanism and the like of the slope harvesting device.

FIG. 6 is a diagram showing a slide movement operation unit such as a blade drive unit and a cam mechanism.

FIG. 7 is a front view showing a state where the cover body has entered the housing.

FIG. 8 is a rear view of the displacement prevention mechanism.

FIG. 9 is a cross-sectional view of the displacement prevention mechanism.

FIG. 10 is a transverse plan view of the slope harvesting device.

FIG. 11 is a transverse plan view showing a position adjusting mechanism of the slope harvesting device.

FIG. 12 is a vertical sectional front view of the plane harvesting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Slope cutting device 20 Blade body 21 Blade body 22 Blade body drive part 49 Connection part

Claims (1)

[Claims] 1. A mowing machine comprising a slope cutting device (3) for cutting grass on a slope connected to one side end of a traveling road surface on the side of the traveling machine body (1), and a pair of vertically stacked ones. The blade surface (20), (21) and the blade body drive unit (22) for relatively horizontally reciprocally sliding the blade bodies (20), (21) to perform scissor cutting are provided. The cutting device (3) is configured, and the blade driving unit (22)
Is fixed in position and can be connected to and released from the double-edged blades (20) and (21).
Mowing the blades (20) and (21) by changing the position in the cutting width direction by providing a plurality of connecting portions (49) for the blade driving units (22) of (0) and (21). Machine.