JPH0242Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a lawn mower that is mainly used to cut grass on ridges.

The grass mower used to cut the grass on the ridge has a cutting blade device for mowing the top surface of the ridge and a blade device for mowing the slope surface of the ridge so that the grass on the slope can be cut together with the grass on the top surface of the ridge. However, since the slope angle of the slope of the ridge is different for each ridge, It came to be mounted on the machine frame so that the angle could be changed and adjusted freely.

The purpose of the present invention is to provide a lawn mower of this type with two cutting blade devices, one for mowing the top surface of the ridge and the other for mowing the slope. In order to avoid leaving uncut areas at the border between the two and to maintain good balance of the machine, we decided to make it possible to drive the machine using a single transmission path when mounted on the machine frame. be.

In order to achieve this purpose, the lawn mower of the present invention is equipped with an engine and a cutting blade device for cutting the top surface of the ridge in front of the main body of the machine frame that supports the running wheels. A cutting blade device for mowing the slope of a ridge is arranged behind the blade device and on one side of the left and right sides of the running wheels when viewed from the front, and is supported so as to be able to freely rotate up and down. The final drive shaft of the transmission mechanism that transmits the rotational power of the engine to each operating part is arranged on the left and right sides of the running wheels, on the side where the slope cutting blade device is installed, and the machine frame is the main body. pivoted on,
The present invention is characterized in that the front end and the rear end of the final drive shaft are conductively connected to each of the operating parts.

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

In Figures 1 and 2, 1 is mainly the machine frame,
It is formed into a long box shape with the bottom side open at the front and back. Reference numeral E denotes an engine, which is mounted on the upper surface of the main body 1 of the machine frame. Reference numeral 2 denotes a running wheel, which is pivotally supported on the bottom side of the machine frame main body 1 with its lower half protruding downward. The running wheel 2 may be pivotally supported as an idler wheel on the machine frame main body 1, but in this example, it is pivotally supported as a drive wheel driven by the engine E, and its axle 20 is supported on the machine frame main body 1. The output shaft 30 of the engine E mentioned above is located on one side of the main body 1 in the left and right direction.
and is transmitted via the conduction belt 31. Reference numeral 4 denotes a control handle, which is installed in such a manner that its base end is fixed to the rear surface side of the machine frame main body 1 and its distal end protrudes rearward.

5 is a cutting blade device for cutting the top surface of a ridge, and the machine frame is mainly 1.
A fixed blade 51 that is long from side to side and fixedly supported by a frame 50 for fixedly supporting the fixed blade 51.
It is a normal hair clipper type, consisting of a movable blade 52 that is attached to the top surface so as to be slidable from side to side.
The actuating section 53 for reciprocating the movable blade 2 left and right is pivotally supported on the frame 50 so that one arm, which is formed in an L shape in plan view and linked to the movable blade 52, rotates left and right about the support shaft 54. There is. As shown in FIG. 1, the cutting blade device 5 for mowing the top surface is arranged in front of the front surface of the main body 1 of the machine frame, and its frame 50 is attached to the left and right sides of the front end of the main body 1 of the machine frame. The support machine frame 10 is supported on the machine frame main body 1 by being attached to the front end of a cylindrical support machine frame 10 installed on the machine frame main body 1 so as to extend forward from one side of the machine frame main body 1 .

Reference numeral 6 denotes a cutting blade device for mowing slopes of ridges, which is a normal clipper-type cutting blade device having the same structure as the above-mentioned cutting blade device 5 for cutting top surfaces, and includes a fixed blade 61 fixedly supported by a frame 60. , a movable blade 62 slidably superimposed on the upper surface of the movable blade 62, and a support shaft 64 connected to the movable blade 62.
The operating part 63 is pivotally supported on a frame 60, and is arranged on one side of the front end of the machine frame main body 1 at the rear of the cutting blade device 5 for upper surface cutting. A rotatable support shaft 64 in the longitudinal direction is provided on the rear end of the cylindrical support frame 10 and the support frame 11 disposed behind the support frame 11 in alignment with the axis of the support frame 10. It is mounted on the main body 1 of the machine frame by supporting it.

a is a transmission mechanism that transmits the rotational power of the engine E to the two cutting blade devices 5 and 6, the cutting blade device 5 for top surface mowing and the cutting blade device 6 for slope mowing, and drives them. A transmission shaft 73 that transmits power via the output shaft 30 of the engine E, transmission wheels 70, 71, and a transmission belt 72 is attached to the left and right sides of the machine frame main body 1 on which the above-mentioned supporting machine frames 10 and 11 are provided. At the same time, a left-right support shaft 74 fixed to the main body 1 of the machine frame is provided below the transmission shaft 73, and the transmission shaft 7
A crank wheel 75 is attached to the outer end of 3, and a crank pin 76 provided on the crank wheel 75 is attached to the outer end of the crank wheel 75.
The upper end side of a swinging rod 77 whose intermediate portion is pivotally supported by the support shaft 74 is connected via a long hole, and the lower end side of the swinging rod 77 is reciprocated back and forth to the machine frame main body 1. These cutting blade devices 5 , 6, and its final drive shaft S is:
As shown in FIG. 1, by slidably fitting into and supporting the inner cavity of the above-mentioned cylindrical supporting machine frame 10, the slope mowing machine is mounted on one of the left and right sides of the running wheel 2. It is pivotally supported on the machine frame main body 1 in a state in which it is positioned along the front-rear direction on the side where the cutting blade device 6 is provided. Each cutting blade device 5 of this final drive shaft S,
6 is connected to the operating parts 53 and 63 of the cutting blade device 5 by attaching a connecting arm 55 to the front end of the final drive shaft S projecting forward from the support frame 10. This is achieved by pivotally connecting the connecting arm 55 to the other end side extending laterally of the operating section 53, and the shaft cylinder of the final drive shaft S is connected to the operating section 63 of the cutting blade device 6. A connecting plate 65 is attached to the rear end portion protruding rearward from the support frame 10.
is mounted so as to be freely rotatable about the final drive shaft S so as not to move in the axial direction of the final drive shaft S, and the connecting plate 65 is connected to the other end side extending laterally of the actuating part 63. is being carried out.

Next, FIG. 5 shows another embodiment of the aforementioned transmission mechanism a and its final drive shaft S. In this embodiment, the final drive shaft S is formed to be long in the front and rear direction, and is arranged on one side of the running wheels 2 on the left and right sides where the cutting blade device 6 for mowing the slope is provided. The fact that it is pivotally supported by the main body 1 is the same as the embodiment shown in FIGS. 1 to 4 described above, but
The transmission mechanism a includes a transmission wheel 70 and a transmission belt 72 provided on the output shaft 30 of the engine E.
The final drive shaft S is provided with a transmission wheel 71 that transmits power through the final drive shaft S. The connection between the final drive shaft S and the operating parts 53 and 63 of the cutting blade devices 5 and 6 is achieved by providing crank wheels 80 and 80 at both front and rear ends of the final drive shaft S, respectively. Crank pins 81, 8 provided at 80
1 is connected to actuating portions 53, 63 which are fixedly connected to moving blades 52, 62 via vertical elongated holes 82 (FIG. 6).

Next, FIG. 7 shows a further different embodiment. This example is a modification of the embodiment shown in FIG. 5, and the final drive shaft S and transmission mechanism a are as follows:
Components that are the same as those in the embodiment shown in FIG. 5 are given the same reference numerals. Therefore, in this embodiment, the connection between the final drive shaft S and the operating parts 53 and 63 of each cutting blade device 5 and 6 is achieved by attaching transmission gears 83 and 83 to both the front and rear ends of the final drive shaft S, respectively. , the transmission gear that meshes with them
84, 84, respectively, the transmission gears 84, 84 are provided with crank pins 81, 81, respectively, and the operating parts 53, 63 are fixed to the moving blades 52, 62.
This is done by connecting the upper and lower elongated holes 82 to the upper and lower elongated holes 82, so that the pivot point of the cutting blade device 6 for mowing a slope is located outward from the final drive shaft S.

In the illustrated embodiment, reference numeral 90 denotes an operating lever mounted on a handle 4 provided on the rear surface of the machine frame main body 1, and is connected via a wire 91 to the frame 60 of the cutting blade device 6 for mowing slopes. By selecting the rotating position of the cutting blade device 6 for mowing slopes,
The inclination angle of is changed and adjusted.

Next, to explain the function and effect, the grass mower according to the present invention configured as described above has a cutting blade device 5 for cutting the upper surface of the ridge to cut the grass on the upper surface of the ridge, and a slope surface for cutting the grass on the slope of the ridge. The cutting blade device 6 for mowing is cut so that there is no uncut area in adjacent areas when viewed from the front.
When viewed from the front, the adjacent parts intersect as shown in FIG. 4, and the respective operating parts 53, 63 respectively to the front end and the rear end of the final drive shaft S, it becomes possible to drive with one transmission path.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of an embodiment of the device of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a partially cross-sectional exploded view of the main parts of the above device, and Fig. 4 is a main part of the same. FIG. 5 is a schematic plan view of another embodiment of the device; FIG. 6 is a schematic front view of the same device;
FIG. 7 is a schematic plan view of a further different embodiment device;
FIG. 8 is a schematic front view of the same device. Explanation of drawing symbols, a...Transmission mechanism, 1...Machine frame main body, 10, 11...Support machine frame, E...Engine, 2...Running wheel, 20...Axle, 30...Output shaft, 31 ...Conduction belt, 4...Control handle,
5... Cutting blade device for top surface mowing, 50... Frame,
51...Fixed blade, 52...Moving blade, 53...Moving section, 54...Spin shaft, 55...Connection arm, 6...
Cutting blade device for slope mowing, 60...Frame, 61...
... Fixed blade, 62 ... Moving blade, 63 ... Actuating part, 64
... Support shaft, 65 ... Connection plate, 70 ... Transmission wheel, 7
1...Transmission wheel, 72...Transmission belt, 73...Transmission shaft, 74...Spin shaft, 75...Crank wheel,
76... Crank pin, 77... Swinging rod, S...
Final drive shaft, 80... Crank wheel, 81...
Crank pin, 82... long hole, 83, 84... transmission gear, 90... operation lever, 91... wire.

Claims (1)

[Scope of utility model registration request] A cutting blade device 5 for mowing the top surface of a ridge is mounted in front of a machine frame main body 1 that carries an engine E and supports a running wheel 2, and behind the cutting blade device 5, the running wheel 2 is A cutting blade device 6 for mowing the slope of a ridge is disposed on one of the left and right sides of the blade 2 and is supported so as to be rotatable up and down, and the operating parts 5 of the cutting blade devices 5 and 6 are
3, 63, the final drive shaft S of the transmission mechanism a that transmits the rotational power of the engine E is arranged on one side of the left and right sides of the running wheels 2, on the side where the cutting blade device 6 for mowing the slope is provided. A lawn mower characterized in that the mower is pivotally supported on a main body 1 of the machine frame, and the front and rear ends of the final drive shaft S are conductively connected to the respective actuating parts 53 and 63.