JPH08256558A - Self-propelled mower - Google Patents

Abstract

PURPOSE: To obtain a self-propelled mower capable of neatly mowing with a slight labor even on a tilted land such as a normal plane in a levee. CONSTITUTION: In a self-propelled mower rotary-driving running wheels 3 and a reaper 4 set in a running machine body A with an engine loaded on the running machine body A, the running wheels 3 are rotatably placed about vertical shaft cores Y1 and Y2 and an operating handle is connected to the engine in one body, the engine is rotatably fixed about a longitudinal shaft core to the running machine body, and the reaper is composed of rotating about vertical shafts-type reaping blades 4a and 4b paralleling to a reaping breadth direction, then the rotating about vertical shaft-type reaping blades 4a and 4b are set to freely tilting/fixing about the longitudinal shaft core X2 and about a horizontal shaft core X1 crossing to the X2 to obtain the objective self-propelled mower.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-behind type self-propelled lawnmower, and more particularly to a self-propelled lawnmower suitable for mowing work on a ridge.

[0002]

2. Description of the Related Art Traveling wheels and a reaping device are provided on a machine body composed of a mission case and a reaping transmission case, and the traveling wheels and the reaping device are rotatably driven by an engine mounted on the machine body. There is known a self-propelled lawn mower of walking control type.

[0003]

In the conventional walk-and-control type self-propelled mower, the engine is integrally provided so as not to rotate relative to the machine body, and the traveling wheels cannot always perform a turning operation and always maintain a fixed posture. Since it was installed so that it could rotate, and the posture of the mowing device could not be changed, the labor burden on the operator when mowing an inclined surface such as the slope of a ridge can be reduced. There was a problem in that it was difficult to mow the mowing device properly along the inclined surface while running the machine with a small number of postures so that the mowing could be finished in a tidy state. Therefore, the present invention can not only satisfactorily cut a flat ground, but also when cutting an inclined surface,
The purpose of the present invention is to obtain a self-propelled mower capable of properly traveling the machine body and properly arranging a reaping device on the inclined surface to reaper in a tidy and finished state.

[0004]

In order to achieve the above object, the self-propelled grass mower according to the present invention has a mission case (1) and a cutting transmission case extending from the mission case (1). -The traveling wheels (3) and (3) and the mowing device (4) mounted on the traveling machine body (A) including the soot (2) are transferred from the engine (5) through the transmission mechanism in the mission case (1). In a walking type self-propelled mower that is rotationally driven by the transmitted power, the traveling wheels are
(3) (3) is provided so as to be able to turn around the vertical axis (Y1) (Y2), and a walking steering handle (6) is integrally connected to the engine (5) to connect the engine (5). It is attached to the traveling machine body (A) so as to be rotatable relative to the longitudinal axis (X2) in the front-rear direction, and further, the mowing device (4) is provided with a plurality of vertical axis rotary cutting blades (4a) (4a) arranged in parallel in the cutting width direction. 4b), and the vertical axis rotary blades (4a) (4b) thereof are rotatable about a longitudinal axis (X2) and a transverse axis (X1) intersecting the longitudinal axis (X2) so that the cutting transmission is performed. It is installed at the tip of the case (2).

[0005]

Since the self-propelled grass mower according to the present invention is constructed as described above, when cutting an inclined surface such as a slope of a ridge, it is necessary to adjust the operation depending on the inclination of the working place. A plurality of vertical axis rotary type cutting blades of the mowing device are appropriately rotated around two axial cores of a longitudinal axis and a lateral axis intersecting with the longitudinal axis to follow the inclined surface, and Despite the inclination, keep the engine in a horizontal position to bring the center of gravity of the entire machine to the mountain side of the inclination to create a posture with improved stability. As described above, it is possible to perform the cutting operation under the stable running condition by turning as described above, and the operation can be performed with less labor burden on the operator to cut the inclined surface to a neat finish state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic perspective view of a self-propelled mower according to the present invention, and FIG. 2 shows its mission case and engine parts. FIG. 3 is an enlarged cross-sectional view, FIG. 3 is a transmission cross-sectional view of a mission case, FIG. 4 is a plan cross-sectional enlarged view showing a cutting device and its drive structure, and FIG.
Is also an enlarged vertical view.

1 to 5, a traveling body (A) includes a transmission case (1) and a cutting transmission case extending from the transmission case (1).
(2) and the pair of left and right traveling wheels (3) and (3) by the power of the engine (5) input to the transmission mechanism in the mission case (1), and the cutting transmission case ( The cutting device (4) mounted at the tip of 2) can be driven to rotate, and the engine (5) is mounted on the traveling machine body (A) with the following configuration.

At the rear of the traveling machine body (A), an axial center in the machine longitudinal direction is provided.
Engine mount that can be rotated left and right around (X2)
(26) are arranged in series, and the engine mounting base (26) is mounted between the engine mounting base (26) and the traveling body (A).
There is provided a lock mechanism (27) which can be rotated left and right with respect to and fixedly maintained in an arbitrary relative tilt position.

Then, the output shaft (28) is directed to the engine mount (26) in the same direction as the shaft core (X2).
(5) is mounted and its engine (5) or engine mounting base
A walking control handle (6) is integrally provided on (26), and an output shaft (28) of the engine (5) is provided through a transmission section (29) equipped with an arbitrary power connection / disconnection means such as a centrifugal clutch. , Is connected to the input shaft (7) of the transmission mechanism in the mission case (1).

The input shaft (7) is rotatably supported on the inner side of the transmission case (1) so as to be concentric with the axial center (X2) in the front-rear direction. Pinion gear
(8) is provided, and the pinion gear (8) is attached to the input shaft.
It is always meshed with a gear (10) that is fitted in a free-rotating state on a pivot (9) parallel to (7), and the front edge of the boss of the gear (10) has a frustoconical friction. A surface (11) is formed.

A pair of left and right passive friction surfaces (12) (1) capable of selectively frictionally contacting the friction surface (11).
Rotation axis where the passive body (13) with 2) is orthogonal to the pivot axis (9)
It is slidably attached to (14), and the passive body (13) is slid by the shifter (15) to provide both passive friction surfaces (12) and (12).
The rotating shaft is switched between a state in which any one of them contacts the friction surface (11) and a neutral state in which neither of the passive friction surfaces (12) and (12) contact the friction surface (11). It is configured so that (14) can be set to the forward / reverse rotation or the neutral state.

Small-diameter bevel gears (16) and (16) are provided at the left and right shaft ends of the rotary shaft (14), and the small-diameter bevel gears (16) and (16) are king pins (17) and (17).
The driven bevel gears (18) (18) fixed to the upper ends of the gears are always meshed with each other. The kingpins (17) and (17) are support cases (19) and (19) extending downward from the left and right sides of the mission case (1), and a rotation case that is rotatably inserted from below. A bearing is rotatably supported at the center of the moving cylinders (20) (20) and supports together with the rotating cylinders (20) (20).
(19) It is possible to turn around the vertical axis (Y1) (Y2) with respect to (19).

Final cases (21) and (21) are respectively arranged below the rotary cylinders (20) and (20), and inside the final cases (21) and (21), Axle drive bevel gear (2
2) (22) is fitted and fixed, and each axle drive bevel gear
(22) (22) is always meshed with the final bevel gears (24) and (24) fitted to the axles (23) and (23) having the horizontal axis, and the outer case portion of the axles (23) and (23) is The traveling wheels (3) (3) fitted to the wheel can be driven to rotate. In addition,
Between the supporting cases (19) (19) and the rotating cylinders (20) (20), the respective rotating cylinders (20) are arranged with respect to the supporting case (19) on the longitudinal axis (Y1). Maintenance means (25) and (25) for turning around (Y2) and fixing and holding at an arbitrary turning position are provided.

On the other hand, a mowing drive shaft is provided in front of the input shaft (7).
(30) is interlocked and its cutting drive shaft (30) passes through the inside of the cutting transmission case (2) and the cutting passive case at the tip end.
It is extended in (31). And the passive reaping case
A bevel gear (32) is provided at the tip of the mowing drive shaft (30) inside the (31), and the bevel gear (32) is fitted to a rotary shaft (33) orthogonal to the mowing drive shaft (30). It is always meshed with (34).

The rotary shaft (33) extends left and right through the inside of a support cylinder portion extending left and right from the passive cutting case (31), and slides left and right on the support cylinder portion. The right and left reaping drive cases (35) (35) which are capable of being pivotally mounted around the lateral axis (X1) of the rotary shaft (33) are inserted. Then, the left and right reaping drive cases (35)
In the (35), bevel gears are attached to the rotary shafts (33), respectively.
(36) (36) is fitted and each bevel gear (36) (3
6) is a passive bevel gear at the upper end of the mowing shaft (37) (37) supported by the hanging cylinder of the mowing drive case (35) (35)
(38) The vertical axis rotary type cutting blades (4a) (4b) which are engaged with (38) and are attached to the lower ends of the mowing shafts (37) (37) are respectively moved in predetermined directions (a) (b). It is configured to be driven to rotate.

The reaping passive case (31) is appropriately rotated right and left around the axial center (X2) in the front-rear direction so that it can be fixed by the fixing means (39) at an arbitrary rotating position. The left and right reaping drive cases (35) (35) rotate back and forth around a horizontal axis (X2) to provide a rotation fixing means.
(40) and the lateral movement fixing means (41) cooperate with each other so that they can be fixed at any rotation position. In addition, in FIG.
Reference numeral (42) shows a remote control lever for switching the transmission mechanism in the mission case to a forward / reverse rotation / neutral state, and (43) shows an accelerator lever of the engine.

When mowing a flat ground with the self-propelled mower configured as described above, as shown in FIGS. 6 and 7, the engine (5) and the traveling machine body (A) are parallel to each other. While keeping the posture, keep the cutting device (4) at the tip of the traveling machine body (A) in a horizontal posture along a flat ground, and make the traveling wheels (3) (3) parallel to the longitudinal axis (X2) and move forward. Once in operation, a wide range of mowing with multiple rotary blades will be performed in the same manner as a conventional self-propelled mower.

Next, in the case of cutting an inclined surface, FIG.
As shown in Fig. 3, install the mowing device (4) in the longitudinal axis (X
2) Rotate around 2) and fix it at a position along the slope properly, and if the engine (5) is tilted to the mountain side of the slope and keeps the horizontal position to move forward, the slope will advance. Even though it is a mowing operation, the trouble of operating the engine (5) does not occur, the entire mower can be kept in a stable state, and slope cutting can be performed with a neat finish.

Further, when cutting a relatively narrow slope such as a slope of a ridge, as shown in FIGS. 9 and 10, the traveling wheels (3) and (3) are attached to the longitudinal axis (Y1). ) (Y2) by appropriately turning and maintaining the reaping wheels (3) and (3) on a flat ground while the mowing device (4) faces the slope, and the mowing device (4) The two joints of the longitudinal axis (X2) and the lateral axis (X1) are appropriately rotated and tilted to properly follow the slope, and the vehicle travels, thereby reducing the operator's burden on the operator and increasing the number of stations. The rotary blades (4a) and (4b) can be used to mow the slope without leaving uncut areas.

Furthermore, when cutting the inclined surface, as shown in FIG.
Also, the harvesting work can be performed under the posture shown in FIG. That is, the traveling wheels (3) (3) are turned and maintained in a state of being substantially orthogonal or orthogonal to the traveling machine body (A), and the remote control lever provided at the driver's proximal portion of the walking steering handle (6). By operating (42) as needed, the traveling machine body (A) can be advanced in the forward direction (F) or in the reverse direction (R) to perform the reaping work.
In this work mode, the traveling wheels (3) (3) do not necessarily have to be located on a flat ground, and in some cases, the traveling wheels (3)
(3) (3) can also perform mowing work while traveling on a slope.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a self-propelled mower according to the present invention.

FIG. 2 is an enlarged partial cross-sectional view of a transmission case and an engine section of a self-propelled mower.

FIG. 3 is a transmission sectional view of a transmission case of a self-propelled mower.

FIG. 4 is an enlarged plan view showing a reaping device and a transmission structure.

FIG. 5 is an enlarged vertical cross-sectional view showing a reaping device and its drive structure.

FIG. 6 is a plan view showing one working posture of the self-propelled mower according to the present invention.

FIG. 7 is a front view showing the posture of the mowing device when in the working posture shown in FIG. 6;

FIG. 8 is an explanatory diagram showing a posture in which the self-propelled grass mower mows an inclined surface.

FIG. 9 is a plan view showing another mowing work posture of the self-propelled mower.

FIG. 10 is an explanatory diagram showing the relative postures of the mowing device and the traveling wheels in the posture of FIG.

FIG. 11 is a plan view showing another mowing work posture of the self-propelled mower.

FIG. 12 is an explanatory diagram showing the relative postures of the mowing device and the traveling wheels in the posture shown in FIG. 11.

[Explanation of symbols]

 A traveling machine body 1 mission case 2 reaping transmission case 3 traveling wheel 4 reaping device 4a vertical axis rotary cutting blade 4b vertical axis rotary cutting blade 5 engine 6 walking handle X1 lateral axis X2 longitudinal axis Y1 Vertical axis Y2 Vertical axis

Claims (1)

[Claims] 1. A mission case (1) and a mission case
Traveling wheels (3) (3) and harvesting device (4) mounted on a traveling machine body (A) consisting of a cutting transmission case (2) extending forward from the sword (1)
In a walking type self-propelled mower that is rotationally driven by power transmitted from the engine (5) through a transmission mechanism in the mission case (1), and the traveling wheels (3) and (3) are set to the vertical axis ( Y1) (Y
2) The engine (5) is provided so that it can be turned around.
A walking control handle (6) is integrally connected to the vehicle, and its engine (5) is attached to the traveling machine body (A) so as to be rotatable relative to the longitudinal axis (X2) of the traveling machine body (A). 4)
Multiple vertical axis rotary cutting blades (4a) (4b) arranged in parallel in the cutting width direction
And the longitudinal rotary blades (4a), (4b) of the longitudinal rotary shafts (4a), (4b) in the front-rear direction and the transverse shaft core (X
A mower characterized by being mounted on the tip of a cutting transmission case (2) so as to be rotatable around 1).