JPH0739222A - Self-propelled grass cutter - Google Patents

Abstract

PURPOSE:To obtain a self-propelled grass cutter capable of attaching and detaching a traveling machine body and a driving mechanism for a grass-cutting blade in one touch. CONSTITUTION:This self-propelled grass cutter is provided with an upper connection cylinder 15 containing a driving shaft 2 having a connection tool and vertically placed on the machine body, a driving case 5 having a cutting blade driving mechanism 4 inserted in a lower connection cylinder 18 which can be freely inserted into the lower part of the upper connection cylinder, a fixing mechanism 19 to fix the lower connection cylinder 18 to the upper connection cylinder 15 in a state connecting a connection driving shaft 17 to a connection tool, cutting blade driving shafts 6, 7 attached to the driving case 5, having protruded cutting blade driving arms 8, 9 and reciprocating at a prescribed angle by a trimmer-driving apparatus 4 and the right and left cutting blade holding arms 11 parallelly protruded from the driving case 5 and having a laterally extending cutting blade supporting bar 12 at the tip end. An upper blade 13 and a lower blade 14 are placed under the cutting blade supporting bar 12 in a state freely reciprocative in the lateral direction and the tip ends of the cutting blade driving arms 8, 9 are connected to the upper blade 13 and the lower blade 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled mower.

[0002]

2. Description of the Related Art A conventional self-propelled mower using a hair clipper type cutting blade has a long cutting blade, which makes traveling, transportation and storage of the mower inconvenient. there were.

SUMMARY OF THE INVENTION It is a technical object of the present invention to provide a self-propelled mower that solves the above-mentioned drawbacks by constructing the cutting blade drive unit of the self-propelled mower so that it can be attached to and detached from the main body with one touch. is there.

[0004]

The gist of the present invention will be described with reference to the accompanying drawings.

A drive cylinder 1 is hung vertically in front of the machine body a, and a drive shaft 2 vertically installed in the drive machine 1 is separated from a small engine 3 for traveling installed in the machine body a to be rotatable. An upper connecting cylinder 15 is vertically provided at a lower portion of the drive cylinder 1, a connecting member 16 capable of transmitting rotation is attached to a lower end of the drive shaft 2, and a connecting drive shaft 17 which is detachably connected to the connecting member 16 is vertically provided. Set cutting blade drive mechanism 4
A lower connecting cylinder 18 that is detachably fitted into the upper connecting cylinder 15 is provided on the upper part of the drive case 5 in which the upper connecting cylinder 15 and the lower connecting cylinder 18 are connected to the connecting tool 16 with the connecting drive shaft 17.
The upper connecting cylinder 15 and the lower connecting cylinder 18 are provided with a fixing mechanism 19 for fixing the two cutting blade drive shafts 6 and 7 which are reciprocally rotated at a predetermined angle by the cutting blade drive mechanism 4 in the drive case 5. The cutting blade drive shafts 6 and 7 are provided with cutting blade drive arms 8 and 9 projecting forward, and the drive case 5 is provided with two cutting blade holding arms 10 and 11 in parallel with each other at predetermined intervals. The cutting blade support arm 12 is provided with a cutting blade support bar 12 laterally at the tip of the two cutting blade holding arms 10 and 11. The present invention relates to a self-propelled mower, which is provided so as to be reciprocally movable, and the upper blade 13 and the lower blade 14 are connected to the tip end portions of the cutting blade drive arms 8 and 9.

[0006]

[Operation] The connecting drive shaft 17 is connected to the connecting tool 16 and the upper connecting cylinder 15 is connected.
When the lower connecting cylinder 18 is fitted in and fixed by the fixing mechanism 19, the rotational power of the traveling small engine 3 is distributed to the drive shaft 2, the connecting drive shaft 17 rotates, and the cutting blade drive mechanism 4 cuts the cutting blade. Since the drive shafts 6 and 7 reciprocally rotate at a predetermined angle, the tips of the cutting blade drive arms 8 and 9 whose bases are fixed to the cutting blade drive shafts 6 and 7 also reciprocate left and right within a predetermined angle range.

When the tip of the cutting blade drive arm 8 rotates right by a predetermined angle, the upper blade 13 pivotally attached to the tip of the cutting blade drive arm 8 moves to the right along the cutting blade support bar 12 by a predetermined amount. The cutting blade driving arm 9 is rotated by a predetermined angle to the left, and the lower blade 14 pivotally attached to the cutting blade driving arm 9 is moved leftward along the upper blade 13 by a predetermined distance. Therefore, the cutting blade of the upper blade 13 moving to the right and the cutting blade of the lower blade 14 moving to the left are used to mow the grass, and this operation is then reversed by the cutting blade drive mechanism 4. The upper blade 13 moves to the left and the lower blade 14 moves to the right, and this operation is repeated to cut grass such as ridges.

When the power to be separated from the traveling small engine 3 is stopped, the fixing mechanism 19 is released, and the lower connecting cylinder 18 is pushed downward, the upper connecting cylinder 15 lowers the lower connecting cylinder 18 and the connecting tool.
The connecting drive shaft 17 can be removed from the connector 16, and vice versa.
Insert the connecting drive shaft 17 into the 16 and connect the lower connecting cylinder 18 to the upper connecting cylinder.
It is also possible to fit them into 15 and fix them with the fixing mechanism 19, so that the cutting blade drive device 4 can be easily attached to and detached from the main body of the self-propelled mower.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawings illustrate a preferred embodiment of the present invention.

The small engine 3 for traveling is attached to the machine body a,
A speed change gear device 22 for driving wheels 21 is provided in the small travel engine 3, and a power distribution device 23 for separating power from the small travel engine 3 is provided in front of the speed change gear device 22.
The base portion of the belt drive device 24 for offsetting the input power from the small traveling engine 3 distributed in front of the power distribution device 23 from the center of the body a to the left front side of the body a and fixing it Then, a bevel gear box in which a connecting cylinder 25 is provided so as to project forward at an offset portion at the other end of the belt driving device 24, and a pair of bevel gears 26 and 27 are internally provided at the tip end of the connecting cylinder 25.
A drive cylinder 1 is hung vertically via 28, and a drive shaft 2 having a base fixed to the bevel gear 27 is vertically installed in the drive cylinder 1. Drive tube 1
An upper connecting cylinder 15 is hung vertically at the lower part of the drive shaft, and a connecting tool 16 is provided at the lower end of the drive shaft 2. The lower part of the connecting tool 16 is formed into a spline or a selection female portion. The upper end of the connecting tool 16 is splined at the lower end. A connecting drive shaft (17) formed on the male selection portion is vertically inserted.

The fixing mechanism 19 will be described in detail.

A lower connecting cylinder 18 which is detachably fitted into the upper connecting cylinder 15 is provided on an upper portion of a drive case 5 having the cutting blade drive mechanism 4 installed therein, and two upper and lower connecting cylinders 15 are horizontally opposed to each other. The locking projection 15 'of this is provided, and the locking projection 15' of this two-piece structure
The base portion of the fixed lever 29 is fitted between them, the locking projection 15 'and the fixed lever 29 are axially attached by the connecting pin 31, the lower connecting cylinder 18 is fitted in the upper connecting cylinder 15, and the tip of the fixing lever 29 is inserted. When pivoted upward, the base portion of the fixed lever 29 is fitted into the body portion of the lower connecting cylinder 18 to attach the curved locking portion 18 ′ for fixing the lower connecting cylinder 18 to the upper connecting cylinder 15 of the lower connecting cylinder 18. Connected to drive shaft 1
A pinion gear 30 is provided at the lower end of 7.

The cutting blade drive mechanism 4 shown in the drawing holds the upper and lower ends of the crankshaft 32 by bearings 33, 33 fitted in the drive case 5, and the pinion gear 30 is attached to the shaft portion near the upper bearing 33.
The crank gear 34 that meshes with the
Two eccentric discs are attached to the crankshaft 32 between the 34 and the lower bearing 33 while maintaining a phase of 180 degrees, and the eccentric discs are connected to the connecting rods 35 and 36 of the connecting rod shape. A cutting blade connecting shaft 42 and a cutting blade drive, in which the large end is pivotally attached and the other small end is projected rightward, and two sets of bearings are respectively held above and below the right side in the drive case 5. The shafts 7 are vertically arranged in series in the vertical direction with their base edges spaced at a predetermined interval.
Shaft is attached to the small ends of 35 and 36, the base of the lever 43 is fixed to the upper end of the cutting blade connecting shaft 42, and the cutting blade connecting shaft 42 and the cutting blade drive shaft 7
The base of a lever 44 having the same shape as the connecting shaft 42 is fixed to the upper end of the cutting blade drive shaft 6 which is held by bearings which are vertically arranged in the drive case 5 on the right side of the lever. 43 ・
A connecting lever 45 is attached to the tip of 44, and the cutting blade drive shaft 6
・ A spline or a selection male portion is formed at the vertically lower end portion of 7, and a spline of the lever-shaped cutting blade drive arm 8 or 9 or a base portion of the selection female portion is fitted and fixed to this lower end portion to secure the cutting blade drive mechanism. Make up 4.

Two cutting blade holding arms 10 are provided on the lower surface of the drive case 5.
・ 11 protruding in parallel to the left and right at a predetermined interval, the cutting blade support arm 12 is installed horizontally at the tip of the cutting blade holding arm 10 ・ 11, and the cutting blades are fastened with a countersunk bolt 39. An upper blade with a plurality of cutting cutting blades 46 projecting forwardly under the support beam 12 for cutting grass
13 and a lower blade 14 having a plurality of cutting blades 46 projecting from the lower surface of the upper blade 13 are respectively provided in a superposed state.
Connecting protrusions 13 ', 14' are integrally formed as projecting parts on the rear side of 14 respectively, and U-shaped provided on the connecting protrusions 13 ', 14' and the tip of the cutting blade drive arms 8, 9. The cutting blade support bar 12, the upper blade 13, and the lower blade 14 which are connected to each other by the groove portions 8 ′ and 9 ′ and the pin shaft 40, and which are provided in the overlapping state.
To the cutting blade support bar 12 with several cutting blade tightening bolts 41.
13 is an upper blade which is slidably locked by the trimmer tightening bolt 41 by holding an appropriate gap between the upper blade 13 and the lower blade 14 so that the lower blade 14 can slide to the left and right. Each of the bolt holes 13 is extended to the left by a predetermined length to form a bolt hole 13 ″, and is extended to the right of each bolt hole of the lower blade 14 to form a bolt hole 14 ″.

Since the embodiment is constructed as described above, when the connecting drive shaft 17 is connected to the connecting tool 16, the lower connecting cylinder 18 is fitted in the upper connecting cylinder 15, and the tip of the fixed lever 29 is rotated upward. The base end of the fixed lever 29 is the curved locking portion 18 ′ of the lower connecting tube 18.
Since the lower connecting cylinder 18 is fixed to the upper connecting cylinder 15 by abutting against the upper connecting cylinder 15, the power separated from the traveling small engine 3 is transmitted to the speed change gear device 22, the power distribution device 23, the belt drive device 24, the bevel gear box.
A crank gear that is transmitted to and meshes with the pinion gear 30 via the drive shaft 2, the connecting member 16, and the connecting drive shaft 17 in the 28.
The crankshaft 32 is rotated by the 34, and the connecting rod 35 is provided by the two eccentric discs which are provided on the crankshaft 32 and maintain a phase of 180 degrees.
・ Since the large end of 36 rotates to convert the small end of the other end of the connecting rod 35 ・ 36 into a reciprocating linear motion with a stroke equivalent to the eccentric amount of the eccentric disc, the connecting rod 35 ・ 36 The small end moves back and forth linearly with a predetermined stroke, and in conjunction with this movement the cutting blade connecting shaft 42
Is reciprocally rotated right and left at a predetermined angle by the link mechanism of the crank arm 37, and the cutting blade drive shaft 6 is reciprocally rotated left and right at a predetermined angle by the link mechanism of the lever 43, the connecting arm 45, and the lever 44. The cutting blade drive shaft 7 reciprocates left and right at a predetermined angle by the link mechanism of the crank arm 38 while keeping a 180 ° phase with the movement, and at the tip of the cutting blade drive arm 8 fixed to the cutting blade drive shaft 6. The upper blade 13 mounted on the shaft is the cutting blade support bar 12
While sliding to the right along the lower surface of the cutting blade clamping bolt 41 as a guide, the lower blade 14 axially attached to the cutting blade driving arm 9 of the cutting blade driving shaft 8 cuts along the lower surface of the upper blade 13. Using the blade fastening bolt 41 as a guide, the blade is slid to the left, and the cutting blade 46 of the upper blade 13 and the cutting blade 46 of the lower blade 14 cut the grass. Contrary to this, the upper blade 13 moves to the left and the lower blade 14 moves to the right. This operation is repeated, and this operation is repeated, and as the machine body a advances, the cutting blades 46 and 46 of the upper blade 13 and the lower blade 14 respectively. Mow the grass on the ground.

When cutting grass, a rotary cutting blade may be more efficient depending on the type of grass and the length of the grass. It may be better to use a short cutting blade,
In that case, the motive power separated from the traveling small engine 3 is stopped, and the tip of the fixed lever 29 is rotated downward to move the lower connecting cylinder 18
When the lower connecting cylinder 18 is pushed downward by releasing the fixation of the upper connecting cylinder 15 and the lower connecting cylinder 18, the lower connecting cylinder 18 is separated from the upper connecting cylinder 15 and the connecting drive shaft 17 is separated from the connecting tool 16. For example, the cutting blade drive mechanism 4 with the cutting blade 46 having a relatively long length of the upper blade 13 and the lower blade 14 can be attached to the cylinder 15 to improve the working efficiency. Further, when the self-propelled mower is moved to a desired place, transported by a transport vehicle, or stored in a warehouse or the like, the cutting blade drive mechanism 4 can be detached from the self-propelled mower by one touch by the above means. Therefore, it is easy to move and store.

According to the present invention, since the cutting blade drive mechanism 4 can be removed with one touch as described above, another type of mowing device can be attached, or a working machine having a completely different rotating mechanism can be attached. It can also be used in a wide variety of ways.

[0018]

Since the present invention is constructed as described above, a drive cylinder is vertically provided in the front portion of the machine body, and a drive shaft vertically installed in the drive cylinder is installed in the machine body to drive power. It is separated and provided rotatably, an upper connecting cylinder is hung vertically at the bottom of the drive cylinder, and a rotation transmitting connector is attached to the lower end of the drive shaft.
A lower connecting cylinder that is detachably fitted into the upper connecting cylinder is provided on the upper part of a drive case that vertically installs a connecting drive shaft that is detachably connected to the connecting tool, and has a cutting blade drive mechanism installed therein. In the state where they are connected to each other, a fixing mechanism for fixing the both to the upper connecting cylinder and the lower connecting cylinder is provided, and two cutting blade drive shafts that reciprocally rotate at a predetermined angle by the cutting blade drive mechanism are provided in this drive case in a protruding manner. A cutting blade drive arm is provided on the cutting blade drive shaft so as to project toward the front side, and two cutting blade holding arms are provided on the drive case in parallel at right and left at predetermined intervals to hold the two cutting blades. A cutting blade support bar is provided horizontally at the tip of the arm, and an upper blade and a lower blade are provided on the lower side of the cutting blade support bar so that they can reciprocate left and right, respectively. Since the tip is connected, the traveling vehicle body of the self-propelled mower and the cutting blade drive device for mowing grass are fixed in one touch Since Detachable freely travel of the upper blade, replacement of the lower blade and the self-propelled mower, transportation, storage is facilitated.

Further, in place of the cutting blade drive device, a rotary rotary blade device, a nylon cutter device or the like can be attached to the upper connecting cylinder and a different type of mower device can be attached and diverted. It becomes a self-propelled mower.

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a partially cutaway side view showing a state in which the cutting blade drive mechanism is separated from the self-propelled mower body by the fixing mechanism of the present embodiment.

FIG. 3 is a side sectional view of an essential part showing a state in which a cutting blade drive mechanism is attached to the self-propelled mower body by the fixing mechanism of the present embodiment.

FIG. 4 is a perspective view showing the structure of a cutting blade drive mechanism of the present embodiment.

FIG. 5 is a plan view of a cutting blade driving arm, a cutting blade holding arm, a cutting blade support bar, an upper blade, and a lower blade of the present embodiment.

FIG. 6 is a front view in which a part of the above is cut away.

[Explanation of symbols]

 1 Drive tube 2 Drive shaft 3 Small engine for traveling 4 Cutting blade drive mechanism 5 Drive case 6/7 Cutting blade drive shaft 8/9 Cutting blade drive arm 10/11 Cutting blade holding arm 12 Cutting blade support bar 13 Upper blade 14 Lower Blade 15 Upper connecting cylinder 16 Connecting tool 17 Connecting drive shaft 18 Lower connecting cylinder 19 Fixing mechanism a Airframe

Claims (1)

[Claims] 1. A drive cylinder vertically installed in a front portion of a machine body, and a drive shaft vertically installed in the drive cylinder is rotatably provided by distributing power from a small engine for traveling installed in the machine body. An upper connecting cylinder is hung vertically in the lower part of the drive shaft, and a connecting tool that can transmit rotation is attached to the lower end of the drive shaft, and a connecting drive shaft that is detachably connected to this connecting device is installed vertically and the cutting blade drive mechanism is installed inside the drive. A lower connecting cylinder that is detachably fitted to the upper connecting cylinder is provided on the upper part of the case, and a fixing mechanism for fixing the upper connecting cylinder and the lower connecting cylinder with the connecting drive shaft connected to the connecting tool is connected to the upper connecting cylinder and the lower connecting cylinder. Two cutting blade drive shafts, which are provided on the cylinder and are reciprocally rotated at a predetermined angle by a cutting blade drive mechanism, are provided in a protruding manner, and the cutting blade drive arms are provided so as to project toward the front side. , Two cutting blade holding arms are juxtaposed in parallel with each other on the drive case at a predetermined interval. The cutting blade support bar is horizontally provided at the tip of the cutting blade holding arm of the above, and the upper blade and the lower blade are provided on the lower side of the cutting blade support bar so that the upper blade and the lower blade can reciprocate left and right respectively. A self-propelled mower characterized by connecting the tip of the blade drive arm.