JPH0135138Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a clipper-type cutting blade device supported on a machine body that runs on running wheels so that it can freely tilt and rotate from side to side about a support shaft in the front and back direction.
This invention relates to an improvement in a grass mower that is used to cut grass on the slope of a ridge with a cutting blade device while the machine is running on the top surface of the ridge.

In the above-mentioned type of mower, a clipper-type cutting blade device is supported on the machine body so as to be tiltable left and right around a support shaft, and the moving blade of the cutting blade device is A transmission mechanism is required to reciprocate from side to side.

The purpose of this invention is to configure this transmission mechanism with a simple mechanism without using a gearbox,
The purpose is to simplify the configuration of the aircraft.

In order to achieve this purpose, the lawn mower according to the present invention has a frame of a clipper-type cutting blade device supported on a machine body that runs on running wheels so as to be tiltable and rotatable left and right about a support shaft in the front and back direction. In a lawn mower, an operating member that reciprocates back and forth by a reciprocating mechanism installed on the machine body is supported by the machine body so as to freely rotate left and right about an axis coaxial with the support shaft, and the operating member is connected to an operating arm of a movable blade that is pivotally supported on a frame of the cutting blade device that is tiltably and rotatably supported on the machine body by the support shaft.

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

In FIGS. 1 and 2, reference numeral 1 designates the body of a lawn mower A, which is formed into a machine casing that opens downward. An engine 2 is mounted on the top surface, and an axle 30 is mounted on the lower side of the interior. A running wheel 3, which is driven by transmission through an output shaft 20 of the engine 2, a transmission wheel 21, and a transmission belt 22, is pivotally supported. In addition, the aircraft 1
A handle bar 4 is installed on the rear side and projects rearward and upward.

Reference numeral 5 denotes a clipper-type cutting blade device that is fixedly mounted on the front end side of the machine body 1, and a fixed blade 51 is fixedly attached to a frame 50 that is fixedly supported on the machine body 1. This is a conventionally known device in which a movable blade 52 is attached to the upper surface of the fuselage 51 so as to be able to slide left and right. By attaching the frame 50 of the cutting blade device 5, which supports the fixed blade 51, to the support frame 54, the frame 50 of the cutting blade device 5, which supports the fixed blade 51, is assembled and supported. Although it is mounted on the machine body 1, it may be a rotary blade cutting blade device or may be omitted.

Reference numeral 6 denotes a clipper-type cutting blade device that is mounted on the machine body 1 so as to be tiltable and rotatable left and right by a support shaft in the longitudinal direction. This is a conventionally known movable blade 62 that is attached to the upper surface of the movable blade so as to be slidable left and right, and is located behind the cylindrical support frame 54 that supports the above-mentioned cutting blade device 5. The frame 60 of the cutting blade device 6 supporting the fixed blade 61 is attached to the support frame 63 provided with a bearing support member fixed to the side surface of the machine body 1 via the support shaft a. By assembling and supporting the blade so as to be tiltable and rotatable left and right, the inner end of the cutting blade thereof wraps back and forth with the inner end of the cutting blade of the above-mentioned cutting blade device 5, as shown in FIG. It is mounted on the machine body 1 so that it is parallel to the cutting blade device 5 on the left and right when viewed from the front of the machine body 1. The support shaft a in the longitudinal direction, on which the frame 60 of the cutting blade device 6 is attached to the support frame 63 so as to be rotatable in the left and right directions, is coaxial with the axis of the cylindrical support frame 54. It is arranged on top.

7 is a reciprocating mechanism that reciprocates the movable blade 62 of the cutting blade device 6 left and right, and both upper and lower ends thereof swing back and forth around a support shaft b fixed at a position provided on the support frame 63. The swinging arm 70 and the supporting machine frame 6
The swinging arm 7 is provided at the protruding end of the rotating shaft 71 which is rotatably supported by the bearing support part 63a of No. 3.
0 through the long hole 70a, and the cylindrical support frame 54.
A support shaft 73 is disposed coaxially within the interior of the support shaft 73 so as to align its axis line with the axis line W of the support shaft a and slide back and forth in that state, and a support shaft 73 is provided on the outer circumference of the support shaft 73.
The shaft cylinder part 7 is fitted so as to move back and forth together with the above-mentioned swing arm 70 and connected via a connecting pin 74.
5, and the shaft cylinder part 75 is formed into a channel shape when viewed from the side and is fitted on the outer periphery of the shaft cylinder part 75 so as to tilt and rotate left and right about the axis W of the support shaft a as a rotation center. and an actuating member c provided to reciprocate back and forth together with the actuating member c.

The operating member c that reciprocates back and forth of the reciprocating mechanism 7 is connected to the frame 60 of the cutting blade device 6 described above.
A vertical support shaft 6 is formed in the shape of a bell crank.
The arm part 65a which protrudes in the lateral direction of the actuating arm 65 for driving the movable blade 62, which is rotatably provided at The operation of the operating arm 65 is changed to the left and right reciprocating motion of the arm portion 65b that protrudes forward of the operating arm 65, and the movable blade 62, which is connected to the front end of the arm portion 65b via the engagement pin 67, is moved left and right. I'm trying to make it move back and forth.

The actuating member c is provided with the above-mentioned support shaft 73 fixed to the body 1, and is fitted onto the support shaft 73 together with the shaft cylinder portion 75 so as to be slidable back and forth. 73 may be pivoted so that it can tilt and rotate left and right about its axis.

Therefore, the above-mentioned support shaft 73 fitted into the cylindrical support frame 54 has a front end projecting forward from the support frame 54 in the shape of a bell crank, which is the same shape as the actuation arm 65. A connecting fitting 57 and a connecting pin 58 are attached to an arm portion 56a that protrudes to the side of an operating arm 56 for driving the movable blade 52, which is rotatably provided on the frame 50 of the cutting blade device 5 by a connecting pin 55 in the vertical direction. As a result, the support shaft 73 supporting the operating member c of the reciprocating mechanism 7 moves back and forth to actuate the operating arm for driving the movable blade 52 of the cutting blade device 5. 56, the movable blade 52, which is connected to the front end of the arm portion 56b projecting forward of the operating arm 56 via an engagement pin 59, is reciprocated from side to side.

Note that 68 is a support arm that is integrally connected to the frame 60 of the cutting blade device 6 so as to support the front end side of the frame 60, and the upper end is rotatably mounted on the support frame 54 in the form of a shaft cylinder. be. Reference numeral 80 denotes a transmission wheel fitted to the inner end of the rotating shaft 71, which is the input shaft of the reciprocating mechanism 7, through which the transmission is conducted via the output shaft 20 of the engine 2, the transmission belt 81, and the transmission ring 82. There is. Reference numeral 9 denotes an operating rod for tilting and rotating the frame 60 of the cutting blade device 6 about the above-mentioned support axis a, and a connecting plate provided on the support arm 68 integral with the frame 60 via a release wire 90 and a spring 91. It is connected to 60a.

Next, to explain the function and effect, the lawn mower according to the present invention has a movable blade 62 of a clipper-type cutting blade device 6 mounted on the body 1 of the mower so as to be rotatable in the left and right directions. Mounted reciprocating mechanism 7
An operating member c provided on the machine body 1 so as to reciprocate back and forth is connected to the frame 6 of the clipper-type cutting blade device 6.
It is positioned coaxially with the axial center line W on which the 0 is tilted and rotated from side to side, reciprocates back and forth, and freely tilts and rotates around the axial center line W. Therefore, when the frame 60 of the cutting blade device 6 is rotated to the desired angle of inclination as shown in FIGS. 5 and 6, the angle of inclination as shown in FIGS. Since the relative position between the actuating arm 65 for driving the moving blade provided on the frame 60 and the actuating member c does not change, a troublesome transmission mechanism such as a bevel gear and the transmission mechanism can be accommodated and rotated. without using a gearbox,
A simple method is to provide a reciprocating actuating member c so as to reciprocate on the rotation axis of the frame 60 of the cutting blade device 6 that rotates at an angle, and to rotate at an angle around the rotation axis. The mechanism can drive the movable blade 62 of the clipper-type cutting blade device 6 mounted on the machine body 1 so as to be tiltable and rotatable.

[Brief explanation of the drawing]

Figure 1 is a plan view of a mower that can implement the present invention, Figure 2 is a side view of the same mower, Figure 3 is a side view of the main parts of the same mower, and Figure 4 is a perspective view of the main parts of the same. , FIG. 5, and FIG. 6 are explanatory diagrams of the functions of the main parts as seen from the front side, taken along the line XX in FIG. 1. Explanation of drawing symbols, A...Mower, 1...Airframe,
2...Engine, 20...Output shaft, 21...Transmission wheel, 22...Transmission belt, 3...Running wheel, 30...
...Axle, 4...Handle rod, 5...Mower blade device, 5
0... Frame, 51... Fixed blade, 52... Moving blade, 53... Mounting bracket, 54... Support machine frame, 55
...Connecting pin, 56... Actuation arm, 56a...
Arm part, 57... Connecting metal fitting, 58... Connecting pin, 5
9... Engagement pin, 6... Cutting blade device, 60... Frame, 60a... Connecting plate, 61... Fixed blade, 62
...Moving blade, 63... Support machine frame, 63a... Bearing support part, 64... Support shaft, 65... Operating arm, 65
a, 65b... Arm portion, 66... Connection pin, 67...
...Engagement pin, 68... Support arm, 7... Reciprocating mechanism,
70... Swinging arm, 71... Rotating shaft, 70a...
...Elongated hole, 72...Crank pin, 73...Spindle,
74...Connection pin, 75...Shaft tube part, W...Shaft center line, a...Spin shaft, b...Spin shaft, c...Operating member,
80...Conduction wheel, 81...Conduction belt, 82...
Transmission wheel, 9...operation rod, 90...release wire, 91...spring.

Claims (1)

[Scope of utility model registration request] In a lawn mower in which a frame of a clipper-type cutting blade device is supported on a machine body that runs on running wheels so as to be tiltable and rotatable from side to side about a support shaft in the front and back direction,
An operating member that reciprocates back and forth by a reciprocating mechanism installed in the aircraft body is supported by the aircraft body so that it can freely rotate left and right about an axis coaxial with the support shaft, and the operating member is A mower, characterized in that the mower is connected to an operating arm of a movable blade which is pivotably supported on the frame of the mower blade device which is supported on the machine body so as to be tiltable and rotatable.