JPH04293415A - Self-propelled level mower - Google Patents

Abstract

PURPOSE:To maintain the height of a handle from the ground constant regardless of any handle direction, thereby improving the operability of the handle of the subject machine. CONSTITUTION:In a mower comprising a frame 1 for erecting traveling wheels 2, a cutter 3 arranged in an inclined state in the upward direction from the ground-near position at the front of the frame to the rear part thereof, a handle 4 projected in the rear direction from the frame, an engine 5 for driving the cutter, etc., the handle is disposed in a state rotatable round a vertical core 6 based on the frame, and the vertical shaft 6 is disposed in the vertical direction based on the horizontal surface.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled ridge mower for cutting ridge grass, etc.

0002

[Prior Art] With this type of ridge mower, when mowing a slope back and forth from the road side above the slope, for example, it is impossible to turn until the end of the slope is reached, so the mower can be cut by turning the handle. The direction of the reaping section is changed (the direction of the reaping section is relatively changed by turning the handle). However, in the past, the pivot axis of this handle was not perpendicular to the horizontal plane and was tilted forward, so the height of the handle above the ground varied depending on the pivot position, resulting in poor operability and reduced work efficiency. It was causing a decline.

0003

SUMMARY OF THE INVENTION The purpose of the present invention is to eliminate such conventional defects, and to achieve this purpose, the following technical measures have been taken.

0004

[Means for Solving the Problems] The present invention provides a vehicle body 1 on which running wheels 2 are mounted, a reaping device 3 located at the front of the vehicle body and inclined rearward and upward from near the ground, and a handle 4 protruding from the rear of the vehicle body. and a lawn mower comprising an engine 5, etc. that drives the reaping device, wherein the handle is configured to be rotatable around 6 vertical axes relative to the vehicle body, and the vertical axis 6 is set perpendicular to a horizontal plane. It is characterized by:

[0005]

[Operation] When mowing grass on a slope, for example, when mowing back and forth from the road side above the slope, first move the handle 4 protruding from the rear of the vehicle from the normal position to the specified position in the direction of travel of the machine. Leave the direction changed at an angle. Then, the worker pulls the handle 4 from the road side on the slope.
The machine is moved forward with the handle, and the grass on the slope is cut. When it reaches the end of the forward path on the slope, it turns to the return path in the opposite direction. At this time, the direction of the reaping device, that is, the direction of the handle, is changed by operating the operating lever provided at the hand of the handle 4. Switch the direction back and forth and turn on the clutch to drive the rotation. Then, the motive power from the engine is transmitted to the reaping device, and the reaping device is rotated around the vertical axis, and the direction of the handle is essentially changed. and,
If the machine is moved in the opposite direction under such conditions, the return mowing operation on the slope will be performed.

[0006] In this way, no matter which direction the handle is turned, the height above the ground remains constant, so the mowing operation can be continued while maintaining the height of the cutting blades above the ground constant. [Effects of the Invention] In summary, according to the present invention, since the pivot axis of the handle is perpendicular to the horizontal plane,
No matter which direction the handle is turned, a constant height above the ground can be maintained at all times, resulting in good operability, and since there is no need to adjust the handle up or down, reaping work can be carried out efficiently.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The machine body (vehicle body) 1 has running wheels 2 mounted on its lower part, an engine 5 at the rear and a handle 4 via a handle support rod 7 that projects long backwards, and a reaping device (to be described later) at the front. There are 3.

The handle support rod 7 is configured to be rotatable around the vertical axis 6. The vertical axis 6, which is the center of rotation of the handle 4, is set perpendicular to the horizontal plane. Reference numeral 8 designates a transmission case, and within this mission case 8 are installed gear transmission mechanisms 11 and 12 for transmitting power to a traveling transmission shaft 9 to the traveling wheels 2 and a reaping transmission shaft 10 to the reaping device 3. ing. A is a drive shaft from the engine 5, and the reaping transmission shaft 10 is interlocked with the drive shaft A through a small diameter gear 11a and a large diameter gear 11b. Reference numeral B designates a speed change clutch, and when engaged with gear 11b, the traveling power transmission shaft 9 rotates at a low speed, and when engaged with gear 12b, the traveling power transmission shaft 9 rotates at high speed from the drive shaft A through gears 12a and 12b. When the speed change clutch B is shifted to the neutral position, the traveling transmission shaft 9 becomes in a non-transmitting state, and the drive to the traveling wheels 2 is stopped.

In front of the mission case 8 is a first transmission case 13 in which the reaping transmission shaft 10 is internally mounted, and four reaping transmission gears 14, 15, 16, 17 are engaged with each other and an internal shaft is mounted. A second transmission case 18 in the vertical direction and a third transmission case 20 that internally supports the drive shaft 19 in the front and back direction are connected, and in particular, the second transmission case 18 is The reaping transmission shaft 10 is provided in a vertically inclined state when viewed from the front so that it is located higher inwardly and upwardly than the drive shaft 19. Third
A driven shaft 21 parallel to the drive shaft 19 is provided on the lateral side of the transmission case 20 and is supported by a support frame 22 protruding from the third transmission case 20 side. and the driven shaft 21 have a driving wheel body 23 and a driven wheel body 24.
The reaping device 3 is constructed by mounting the reaping device 3 on a shaft and winding a bandsaw type endless cutting blade 25 around the reaping device 3.

The running wheels 2 include an engine 5, a transmission case 8, a first transmission case 13, and a second transmission case 18.
The worm wheel mechanism 26, 27 . Traveling drive shaft 28. The transmission chain 30 in the chain case 29 is interlocked to drive rotation. The reaping transmission shaft 10 is provided with a pair of bevel gears 33 and 34 that mesh with a bevel gear 32 provided on a shaft 31 orthogonal thereto, and a clutch 35 is inserted into one of the bevel gears 33. Bevel gear 3
2. The vertical shaft 6 is rotated from the worm wheel transmission mechanism 36, 37 and the wheel shaft 37a via the universal joint 38, and the handle 4 is rotated clockwise, and the other bevel gear 34 side When clutch 35 is engaged, bevel gear 3
2. The vertical shaft 6 is rotated in the opposite direction through the worm wheel transmission mechanisms 36, 37, etc., and the handle 4 is rotated counterclockwise. In this case, if the operator manually holds the handle 4 in a fixed state, the reaping device 3 will rotate to the right around the vertical axis 6 or to the left around the vertical axis 6. A balance arm 4 is attached to the shifter 39 so that the shifter shaft 40 can be reciprocated by a clutch lever 41 provided on the handle 4.
2 through operating wires 43, 43. A clutch release arm 44 is provided on the shifter shaft 40, and a tension spring 46 is provided between both ends of the clutch release arm 44 and the fixed member 45 side. On the other hand, there is a clutch release arm near the six vertical shafts of the handle support rod 7 that rotates integrally with the handle support rod 7.
A clutch actuating body 47 is provided that pushes the clutch member 44 and forcibly operates the clutch toward the disengaged side.

That is, when the clutch 35 is in the bevel gear 34 side, the handle support rod 7 turns counterclockwise, but when it turns to a predetermined position, the clutch actuating body 47
pushes the clutch release arm 44, and the swinging of the balance arm 42 disengages the clutch, thereby stopping the rotation of the handle. Therefore, with this configuration, it is possible to prevent mechanical locking due to excessive turning of the handle.

[Brief explanation of drawings]

FIG. 1 is a side view of a ridge mower.

FIG. 2 is a plan view of the ridge mower.

FIG. 3 is a vertical sectional side view of the main parts of the ridge mower.

FIG. 4 is a plan view of the main parts of the ridge mower.

FIG. 5 is a plan view of the main parts of the ridge mower.

[Explanation of symbols]

1 Airframe (vehicle body) 2 Traveling wheels
24 Driven wheel body 3 Reaping device
25 Band saw endless cutting blade 4 Handle
26 Worm 5 Engine
27 Worm wheel 6 Vertical axis
28 Travel drive shaft 7 Handle support rod
29 Chain case 8 Mission case
30 Transmission chain 9 Traveling transmission shaft
31 Shaft 10 Reaping transmission shaft 32
Bevel gear 11 Gear transmission mechanism
33 Bevel gear 12 Gear transmission mechanism
34 Bevel gear 13 First transmission case
35 Clutch 14 Reaping transmission gear
36 Worm 15 Reaping transmission gear
37 Worm wheel 16 Reaping transmission gear
38 Universal joint 17 Reaping transmission gear
39 Shifter 18 Second transmission case
40 Shifter shaft 19 Drive shaft
41 Clutch lever 20 Third transmission case
42 Take-up arm 21 Driven shaft
43 Operation wire 22 Support frame
44 Clutch release arm 23 Drive wheel body
47 Clutch operating body

Claims (1)

[Claims] 1. A vehicle body 1 on which running wheels 2 are mounted, a reaping device 3 located at the front of the vehicle body and inclined rearward and upward from near the ground, a handle 4 protruding from the rear of the vehicle body, and an engine that drives the reaping device. The mower is characterized in that the handle is configured to be rotatable around six vertical axes relative to the vehicle body, and the vertical axis six is set perpendicular to a horizontal plane. Self-propelled ridge mower.