JPH0126199Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a cutting blade device at the front end of the machine frame, which is formed long from front to back, and an engine, running wheels, and control handle at the rear end of the machine frame. This invention relates to an improvement in a lawn mower that is used in such a way that a driver standing at the rear grasps and controls the steering wheel while moving the machine on running wheels and cutting grass with a cutting blade device at the front end of the machine frame.

Since the above-mentioned mower can run in narrow spaces, it is well adapted to be used to run on the top of a ridge and cut grass on the ridge.
It is hoped that the grass on the slopes of the ridges can also be cut at the same time.

The purpose of this invention is to provide a method for mowing the grass on the slope of the ridge in the same work process as mowing the grass on the upper surface of the ridge when the above-mentioned mower is used to cut grass on the ridge. A cutting blade device for surface mowing can be easily attached, and the attached cutting blade device for slope mowing does not impair the running performance of the machine, and when mowing work on flat ground, the front end of the machine frame can be easily installed. The object of the present invention is to propose a new means that can be used in conjunction with a cutting blade device to convert the cutting width into a state in which it doubles from side to side.

In order to achieve this purpose, the lawn mower of the present invention is provided with a cutting blade device at the front end of a machine frame that is formed long in the front and back, and a running wheel, an engine, and a control handle are installed at the rear end of the machine frame. In a mounted mower, a mounting frame is installed near the rear of one of the left and right sides of the machine frame, and a mounting frame is installed on the mounting frame.
A vertical frame is detachably assembled, a horizontal frame is connected and supported at the lower end of the vertical frame so as to be rotatable up and down, and a cutting blade device for slope mowing is mounted on the horizontal frame. A feature is that it is equipped with a retention mechanism that holds the horizontal frame in a predetermined rotational position.

Next, an example of implementation will be described in detail with reference to the drawings.

In Fig. 1, reference numeral 1 denotes a machine frame that is long in the front and back, and is shaped like a shaft tube, and the engine 2 is attached to its output shaft at the rear end (not shown in the drawing).
The shaft is assembled and supported so as to protrude into the inner cavity of the tubular machine frame 1.

3 is a control handle provided at the rear end portion of the machine frame 1 so as to protrude rearward;
0 is fixed to the rear end of the machine frame 1 and is mounted and supported by a mounting machine frame 10 which is integrally assembled.

Reference numeral 4 denotes a running wheel installed on the rear end side of the machine frame 1. A support machine frame 40 is provided near the rear end of the machine frame 1 and projects diagonally downward to the rear. It is pivotally supported at the lower end of the frame 40. The support frame 40 is formed in the shape of a vertically long shaft, and its upper end 40a, which is the base end, is bent laterally.
As shown in the figure, the main body portion 40b in the vertical direction is attached to the rear end of the machine frame 1 by integrally fixing it along the mounting machine frame 10 provided at the rear end of the machine frame 1. It is arranged to be located on one of the left and right sides of the side. Then, at the lower end of this support machine frame 40,
By mounting a support shaft 41 that protrudes toward the left and right sides of the machine frame 1 and attaching the running wheel 4 to this support shaft 41, the running wheel 4 can be attached to the lower end of the support machine frame 40. It is pivoted on the support.

Reference numeral 5 denotes a cutting blade device installed at the front end of the machine frame 1, and a bearing member 50 is integrally assembled to the front end of the machine frame 1.
A rotating shaft body 51 whose axial direction is vertical is supported on the bearing member 50, a blade mounting plate 52 is attached to the rotating shaft body 51, and a plurality of rotating blades 53 are attached to the blade mounting plate 52 so as to protrude radially. The cutting blade device is a rotary blade type, and the rotating shaft body 51 is connected to the output shaft of the engine 2 through a transmission gear housed in a bearing member 50 and a transmission shaft housed in a shaft-tubular machine frame 1. The rotating shaft body 51 is driven and rotated by the operation of the engine 2, so that the rotating blade 53 acts to cut grass.

6 is the above-mentioned running wheel 4 behind the cutting blade device 5.
A wheel body positioned forward of the machine frame 1 and pivoted on the machine frame 1.
The lower end of a stay 61 that is assembled and fixed to a mounting machine frame 60 provided at an intermediate portion near the front end of the machine frame 1 is supported via a support shaft 62, and the wheel body 6 is attached to the periphery of the stay 61. Teeth portions 6a are provided to protrude radially, which penetrate into the soil when the roller touches the ground and rotates. Further, the direction of the rotational axis W of the wheel body 6 in a plan view is set at a desired angle with respect to the direction of the rotational axis Y of the running wheel 4 by changing the assembly position of the stay 61 and the mounting frame 60. It is designed so that it can be set to a tilted state.

Reference numeral 7 denotes a cutting blade device for mowing the slope of a ridge, which is disposed on one of the left and right sides of the machine frame 1 and supported by the machine frame 1, and is located on one of the left and right sides on the rear end side of the machine frame 1. An assembly mechanism 70 is provided on the side opposite to the side on which the aforementioned mounting machine frame 10 is provided, and the assembly is supported by the assembly mechanism 70.

The assembling machine frame 70 connects the upper end portion 40a of the supporting machine frame 40, which supports the above-mentioned running wheel 4 in a cantilevered manner, which is bent horizontally and is fixed to the mounting machine frame 10, to the machine frame 1.
It extends to the side opposite to the main body portion 40b of the supporting machine frame 40 located on one side of the machine frame 1, projects on the other side of the machine frame 1, and is fixedly attached to the free end of the projecting portion 40c. The cutting blade device 7 for mowing the slope of a ridge is configured such that the upper end of the vertical frame 71 is removably fastened to the assembly frame 70 with a set bolt, and the lower end of the vertical frame 71 is attached to the horizontal The inner end of the frame 72 is connected and supported so as to be rotatable up and down via a connecting shaft 78 in the front and back direction, and a bearing member 73 is fixed to the horizontal frame 72, and a rotating shaft whose axial direction is vertical is connected thereto. 74 is mounted on a shaft, and rotary blades 76 are attached to the rotating shaft body 74 via a blade mounting board 75,
The rotating shaft body 74 is connected to the upper end of the bearing member 73 through a coupling, and conduction is made between one end of a flexible shaft in a flexible tube 77 and the inner cavity of the bearing member 73, and the other end of the flexible shaft is connected to the above-mentioned By connecting the rotating shaft 51 in a bearing member 50 provided at the front end of the machine frame 1, the engine 2 supported on the rear end of the machine frame 1 is driven, as shown by the arrow in FIG. This is a rotary blade type cutting blade device in which a rotary blade 76 rotates to cut grass, and a blade plate for sending out the grass cut by the rotary blade 76 is appropriately installed on the upper surface of a blade mounting board 75 thereof.

Reference numeral 8 denotes a retaining mechanism that holds the slope cutting blade device 7 at a predetermined rotational position, and a release wire 80 consisting of an inner and an outer layer is attached to the horizontal frame 72 of the slope cutting blade device 7. One end of the wire 80 is connected via a spring 81, and the other end of the wire 80 is attached to the control handle 3 using a lever 82.
By removably connecting the lever 82 to the
When the lever 82 is rotated to the position where the release wire 80 is pulled, the cutting blade device 7 is held in a horizontal position as shown in FIG. 1, and the lever 82 is released from pulling the wire 80. By rotating the cutting blade device 7 to this position, the cutting blade device 7 is switched to an inclined posture along the slope of the ridge. At this time, the spring 81 provided between one end of the wire 80 and the horizontal frame 72 is
It acts to correct the inclination of the cutting blade device 7 supported by the horizontal frame 72 to a state that follows the inclination angle of the slope of the ridge.

Further, the running wheel 4 has a sprocket 42 attached to a rotating shaft that fits into the above-mentioned support shaft 41, and the sprocket 42 is attached to a transmission case 90 provided halfway toward the rear end of the above-mentioned machine frame 1. A transmission chain 92 and a sprocket 93 are attached to a power take-off shaft 91 which is supported by a power take-off shaft 91.
The rear end of the machine frame 1 is transmitted to the transmission shaft housed in the inner cavity of the machine frame 1 through a deceleration mechanism in which the power take-off shaft 91 is housed in the transmission case 90. The motor is driven to rotate by being decelerated by the speed reduction mechanism using the power of the aforementioned engine 2 assembled into the motor.

b is a gripping rod that is installed on body a of the above-mentioned lawn mower A as a gripping part when the operator lifts the body a, and is located on the side of the machine frame 1 where the cutting blade device 7 for mowing slopes is installed. A control handle 3 fixedly attached to the rear end of the machine frame 1 is located at the front and rear center of gravity of the machine body 1 on the side surface of the machine so as to protrude toward the slope cutting blade device 7 side. By fixing the base end of the gripping part b to the side surface of the base end part 30, it is installed on the side surface of the machine frame 1 on the side of the cutting blade device 7 for mowing the slope.

Next, to explain the function and effect, the mower A according to the present invention configured as described above is long in the front and back, the cutting blade device 5 is mounted on the front end, and the engine 2 and the control handle are installed on the rear end. An assembling machine frame 70 is installed from the rear of one left and right side of the machine frame 1 of the mower A on which the mower 3 and the running wheels 4 are mounted. 71 is detachably assembled, and a horizontal frame 72 that supports the cutting blade device 7 is connected and supported to the lower end of the vertical frame 71 so as to be rotatable up and down. Retaining mechanism 8 that retains the rotating position
For example, when cutting only the grass on the top of a ridge, the machine frame 1
When using only the cutting blade device 5 at the front end to cut grass on a flat surface, remove the vertical frame 71 from the assembly machine frame 70 and move the cutting blade device 7 for slope mowing to the side of the machine frame 1. Lawn mower A as removed from
At this time, the assembly frame 70 is located above the rear side and does not interfere with the maneuvering movement of the aircraft a. Reaping work using the cutting blade device 5 at the front end of the frame 1 can be performed smoothly and easily.

Further, the upper end of the vertical frame 71 is assembled to the assembly machine frame 70, and the slope mowing blade device 7 supported on the horizontal frame 72 connected to the lower end of the vertical frame 71 is attached to the machine frame 1. If the horizontal frame 72 is positioned on the side and the horizontal frame 72 follows the slope of the ridge by operating the retaining mechanism 8, as the aircraft a moves,
Since the cutting blade device 7 cuts the grass on the slope of the ridge, the grass on the top of the ridge and the grass on the slope are
When mowing is desired at one time, the state can be easily changed to suit the mowing without interfering with the running of the mower A. Thus, if the slope mowing cutting blade device 7 assembled and attached to the assembled machine frame 70 provided on the side surface of the machine frame 1 is placed in a horizontal position by the operation of the holding mechanism 8, the machine frame The cutting width of the mower A is doubled in parallel with the cutting blade device 5 installed on the front end of the mower A, so when mowing grass on a flat area, it can be installed for mowing slopes. The cutting width can be doubled by using the attached cutting blade device 7 without removing it.

[Brief explanation of the drawing]

FIG. 1 is a side view of a device according to an embodiment of the present invention, FIG. 2 is a plan view of the same device, and FIG. 3 is a perspective view of essential parts of the device. Explanation of drawing symbols, A...Mower, a...Airframe, b...
Gripping rod, 1... machine frame, 10... mounting machine frame, 2... engine, 3... control handle, 30... base end, 4... running wheel, 40... support machine frame, 40a... upper end, 40b...
Main body part, 40c... Projection part, 41... Support shaft, 42... Sprocket, 5... Cutting blade device, 50... Bearing member, 5
DESCRIPTION OF SYMBOLS 1... Rotating shaft body, 52... Blade mounting board, 53... Rotating blade, 6... Wheel body, 6a... Teeth part, 60... Mounting machine frame, 6
DESCRIPTION OF SYMBOLS 1...stay, 62...support shaft, W...rotation axis, Y...rotation axis, 7...mower blade device for slope mowing, 70...assembly machine frame, 71...vertical frame, 72...horizontal frame, 7
3... Bearing member, 74... Rotating shaft body, 75... Blade mounting board, 76... Rotating blade, 77... Flexible tube, 78... Connection shaft, 8... Retaining mechanism, 80... Release wire, 81... Spring, 82... Lever,
90...Transmission housing, 91...Power take-off shaft, 92...Conduction chain, 93...Sprocket.

Claims (1)

[Scope of utility model registration request] In a lawn mower, a cutting blade device is installed at the front end of a machine frame that is long from front to back, and running wheels, an engine, and a control handle are mounted on the rear end of the machine frame. Near the rear of one side,
A mounting machine frame is installed, a vertical frame is removably assembled on the mounting machine frame, and a horizontal frame is connected and supported to the lower end of the vertical frame so as to be rotatable up and down,
A lawn mower characterized in that a cutting blade device for mowing slopes is mounted on the horizontal frame, and a retaining mechanism is installed to hold the horizontal frame in a predetermined rotational position.