JPS6181720A - Power grass reaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power lawn mower that is moved by engine power and that cuts grass by driving a cutter or the like.

(Prior Art) A power lawn mower is put into practical use as a small working machine that moves using engine power and cuts grass by driving a cutter.

This type of lawn mower is equipped with a rotating blade type cutter in the cutter housing, and the housing is provided with a duct that guides the cut grass toward the rear on one side, and the cut grass is discharged toward the rear on one side, or A grass bag is attached to the outlet of the duct, and the cut grass is stored inside the bag.

In addition to the above, conventional small, hand-held lawn mowers of this type normally only move forward and require a complete change of direction when reciprocating to mow adjacent rows.

(Problems to be Solved by the Invention) The conventional lawn mowers described above discharge the cut grass to one side or store it in a bar installed on the discharge side. When mowing weeds such as weeds in agricultural fields, weeds in general farmland, and weeds in wastelands, if you use a housing to hold down the grass in the direction of movement, the grass will fall over and be difficult to mow because it is taller than the lawn. Grass, on the other hand, needs to be discharged to the side, for example. In some cases, for example, in a rice field, it is undesirable to have cut grass facing into the paddy field, so it is discharged backwards and forwards and left to wither. Depending on the location and conditions, it is preferable to discharge the seeds from side to side and leave them to wither.

In addition, when moving the work equipment and attempting to reap a row parallel to the row that was reaped at the travel limit, conventional methods completely move the work equipment to 1.
It is necessary to invert it by 80 degrees, which is a cumbersome task.

The present invention has been made in view of the above.

(Objective of the Invention) The object of the present invention is to provide a power mower that can efficiently and smoothly cut weeds in fields, fields, and other remote areas, and that achieves the above with a simple configuration. It is on offer.

(Means for Solving the Problems) In order to solve the above-mentioned conventional technical problems and also achieve the above-mentioned objects, the present invention provides a system that is supported by four wheels on the front, rear, left and right sides and can be moved forward and backward by an engine. In addition, the cutter is driven by the engine, and the cutter housing is opened in one direction and the opposite direction, such as front and rear.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show external views of a lawn mower according to the present invention.

Grass cutting 1! To explain the outline of (1), there are rolling wheels (3) on the left and right of the front of the fuselage (2), and drive wheels (4) on the left and right of the rear.
), (4), roller wheels (3), (3) and drive wheels (
0°(4) has a palindrome all around its outer periphery and has a gear-like appearance when viewed from the side, increasing its holding power to the road surface. 4 as body (
The engine (5) is mounted in the center of the aircraft (2) in the longitudinal direction and the center in the left-right direction (width direction).The engine (5) is a vertical engine with a vertical crankshaft installed in the example, and the engine (2) A blade-forming lid (6) that is driven by the blade (5) is installed directly below the blade (5), and the cutter (8) has a blade on the side edge and rotates to cut the grass and perform mowing work.
There are side pieces (7a), (7
a) is allowed to hang down, and its upper ends are connected by an upper piece (7b), thereby forming a cutter housing (7) that covers the left and right sides of the cutter (6).

Therefore, the left and right sides of the cutter (6) are covered by the cutter housing (7), and the front and rear sides in the advancing direction are open.

The engine (5) is surrounded by a cover (8), has a muffler (9) on the negative side, and a carburetor (which forms the fuel supply device) on the other side.
10) are arranged in each case, and a fuel tank (11) is installed at the rear of the upper part.
Also, there is an air cleaner (!0) on the rear upper side of the carburetor (!0)
12) is provided.

゛Left and right drive wheels (4) that form the rear wheels at the rear of the aircraft (2).

(4) A handle post (13) is installed upwardly in between, and a handle (14) extends above this so as to be inclined rearward and upwardly, as shown in Figures 1 and 2. There is. The handle (14) consists of a pipe-shaped rod (14a) extending from the handle post (13) and a loop-shaped handle (14b) provided at the upper end of the pipe-shaped rod (14a). The front wheels (3), (3) are provided so as to be freely transferable via brackets (15) attached to the front left and right sides of the fuselage (2) so as to tilt forward and downward.

The drive system is as shown in FIGS. 7 to 9, and as shown in FIG. 1B) is equipped with a small diameter pulley (lea) at the top, and a holding plate (18b) is installed at the bottom.
). A plurality of centrifugal expansion type clutch engagers (17a) are attached to the lower surface of the retaining plate (18b), and the retaining plate (I
A drum-shaped clutch outer (17b) having a larger diameter and opening upward is disposed below Elb, thereby forming a centrifugal clutch (17).

The upper end of a cutter shaft (18) is fixed to the center of the bottom piece (17c) of the clutch outer (17b), and the middle part of the shaft (18) is attached to a holder (2) hanging from the machine body (2) via a bearing (19). A cutter (6) is fixed to the lower end of the cutter shaft (18) via a cutter holder (6a).
When the rotation speed of a) reaches a predetermined value, the engager (1?a) expands and engages with the inner surface of the circumferential piece (17d) of the flange outer (17b), transmitting driving force thereto, and rotating the shaft (18). ) to rotate the cutter (6). In addition, (20) in the figure is a brake shoe forming a brake device provided on the outer circumferential side of the circumferential piece (71d) of the clutch outer (1?b), which is pressed against the circumferential piece (17d) by lever operation described later, and the cutter (8) Perform braking.

A support frame (2c) is extended rearward from the boss part (2b) of the holder (2a) described above, and the support shaft (21) is raised at the higher rear part of the frame (2c) via the boss part (2d). Set up

A driven side transmission member (23) is fitted around the upper part of the boss part (2d) via a bearing (22), and the member (23) is provided with a large diameter pulley (23a) at the lower part, and the pulley (23a) A bell (24) is wound between the pulley (lea) and the above-mentioned pulley (lea), and a friction member is pasted on the outer periphery of the small diameter cylindrical upper part (23b) of the member (23), and a friction drive roller is formed. (25) is formed. These pulleys (18b) and (23a) are provided spaced apart from each other in the front and back, and as shown in FIG.
A pulley (28) is provided, the shaft (28a) of which engages with a long hole (27) provided on the fuselage side, and the shaft (28) is inserted into the long hole (27).
2 [1a), press the tension boo (26) against the belt, or release the pressure, and press the tension boo (26) onto the belt.
4), and the power of the pulley (16b) is transferred to the pulley (16b).
23a).

An intermediate transmission shaft (28) is disposed above the transmission member (23) in the left-right direction, and a disc-shaped friction is provided around the transmission shaft (28) via sliding collars (29). Insert the discs (30) and (31), and then
0).

(31) rotates together with the shaft (2B), but can slide in the axial direction. Such a friction disc (30).

The aforementioned roller (25) faces between the lower portions of (31), and the disks (30), (31) and roller (25) constitute a friction clutch. Disks (30) and (31) are the 9th
In the figure, the neutral position is shown with the rollers (25) spaced apart, and one of the 7-linkage disks (30) or (31) can be moved to the roller (
The roller (25) is brought into contact with the roller (25) to frictionally engage the two.
) is transmitted to one of the friction discs, thereby driving the transmission shaft (28), and by selecting the frictional engagement of the disc (30) or (31) with the roller (25), the transmission shaft ( 28) are rotated in forward and reverse directions, driving wheels (4), which form the aforementioned rear wheels, are driven in forward and backward directions to perform forward and backward movement.

One end of the intermediate transmission shaft (28) is supported via a bearing (32) on the machine side support boss part (2e), and the other end is similarly supported on the boss part (2g) of the machine side support part (2f). 32). The left and right support portions (2f), (2f) support the rear wheels (4), which are the driving wheels described above, on the support shafts (33),
(33), and on the other hand, a small diameter sprocket (34) is provided at the end of the transmission shaft (28) mentioned above, and on the other hand, a final Drive shaft (3
5) horizontally, and a large-diameter subrocket (H) is fixed inside one support part (2f) at one end of this to connect the tin rocket (34) and Che 7 (37) described above. Connect via. Gears (3B), (38) are fixed to both ends protruding from the support parts (2f), (2f) of the final drive shaft (35), while the inner diameter parts of the rear wheels (4), (4) A ring gear (4a) and (4a) are provided respectively, and the gear (4a) and the gear (
Transmission shaft (28) by 0 or more that interlocks with
, Che7 (37), Sprocket (34).

The rear wheels (4), (4) are driven through the rear wheels (36), the drive shaft (35), and the gears (38), (4a).

Next, referring to the handle (14), in this embodiment, the handle (14) can be rotated left and right with respect to the handle post (14) in a plan view as shown in FIG. C:) 90° from the normal position (A)
It can be rotated left and right, and can be locked and held at any position (angle) within a range of 80' left and right. and the first
As shown in the figure, the vertical position (D) relative to the normal height direction position (A) is
), (E), and can be locked and held at any angle.

An example of such rotation and vertical angle adjustment mechanism (39) is shown in the 10th example.
11, the support pipe (4) is rotatably attached to the base pipe (40) installed on the handle post (13).
1), horizontally suspend the shaft (42) on it, and install the handle (
The base (+40) of the rod (+4a) of 14) is supported so as to be rotatable up and down via the bracket (+4d). A fan-shaped regulation piece (43) is fixed on the side of the bracket (14d), and teeth (43a) are provided on the outer periphery of this, while a semicircular immovable regulation piece is provided at the upper end of the base pipe (40). Piece (
44) is fixed and teeth (44a) are provided on the outer periphery of this.

Then, a support piece (45) is provided on the support pipe (41) side,
The retainer (46) is supported by this, and the retainer (4B) has a shape in side view and plan view, and the retainer (4B) engages and disengages with the tooth (43a). Tooth (48b)
The engaging element (46) having these teeth is equipped with a spring (47).
) is biased in the engagement direction via the pusher (48), and the cable (48) moves the engager (46) between the regulating pieces (43) and (4).
4), thereby removing the teeth (43a) and (44a).
), (48a), (48b) are disengaged, /
\The handle (14) moves up and down around the spindle (42),
In addition, a support pipe (41) fitted to the Heath pipe (40)
) allows it to be rotated left and right.

The loop-shaped handle (14b) of the above handle (14)
A bracket (14e) is provided on the - side of the bracket (14e) for tensioning and loosening the existing tension roller (26). A cutter brake lever (51) is provided on the other side of the cutter brake shoe (20) for operating the cutting brake shoe (20). Switching of disks (30) and (31),
That is, a lever (52) for switching backward movement is provided, and is also provided in parallel with the lever (52) to release the aforementioned engagement of the handle (14).

An operating lever (53) is provided to do so. A loop-shaped boss part (14f) provided at the upper end of the handle bar part (14a) supports the base of the handle part (14b), and a throttle operating lever (54) is located in the center of the boss part (14f). A knob (55) for starting the recoil starter is provided on the handle.The various operation levers provided on the handle section can be used to turn on/off power transmission for traveling, switch between forward and backward travel, adjust the throttle, brake the cutter, and handle the handle. Rotate, adjust the vertical angle, and start the engine.

In the above, the engine is started and the blade-shaped cutter (8) rotates at a predetermined number of revolutions, while the already mentioned lever (5)
For example, if you select 2) and move forward and cut the grass while moving forward, the grass in the direction of movement will not fall down and will stand up. The upper end of the open part of the housing that is held or in the direction of movement interferes with the head of the grass, making it tilt and lie down, so that the stem faces the cutter (6), and the rotation of this will ensure that it is cut, and the stem will be cut in the direction of movement. is ejected behind. Since a grass bag is not provided, the cut grass remains on the travel path and dies. When mowing the next row of grass after mowing weeds a predetermined distance by moving forward, the mower (1) is moved sideways and moved backward by switching the lever (52), thereby mowing the grass. Grass remains behind in the direction of travel and dies. By repeating this process, the ground in parallel is mowed in sequence, and the mowing machine is not turned over, making mowing work more efficient.

12 and 13 show a modified embodiment of the invention.

Open both sides of the cutter housing (107)
b) A front piece (
107a), and close with the back piece (107c). The front and rear surfaces should be high enough to completely cover the grass in the direction of travel, and the cutter (8) should interfere with the stems. In this case, the cutter (
The grass cut in step 6) is discharged to the side from the side opening (107b).

In the above embodiments, the handle has a variable wR angle in the horizontal direction and in the height direction in plan view, but the handle may be of a fixed type.

(Effects of the Invention) As is clear from the above, according to the present invention, since the cutter housing is open in the front and back, etc., the stems of weeds are accurately cut, mowed, and the cut grass is discharged in the front and back, etc. It is particularly advantageous in cutting weeds in farmland, etc.
The front and rear discharge type does not discharge grass biased to the side, and is advantageous because it does not allow grass to get into the rice paddies or fields.It also has a simple structure because it does not require a grass bag. Since this is possible, it has many advantages, such as mowing work that can be carried out repeatedly by moving forward and backward without reversing, and mowing work can be carried out efficiently.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of one side, Fig. 2 is a side view of the other side, Fig. 3 is a front view, and Fig. 4 is a side view of the other side.
Figure 5 is a rear view, Figure 5 is a plan view, Figure 6 is a bottom view, Figure 7 is a longitudinal side view showing the drive system, Figure 8 is the same plan view, and Figure 9 is a longitudinal front view of the wheel drive system. , FIG. 10 is a side view showing an example of the handle lock mechanism, FIG. 11 is a plan view of the same, and FIG.
The figure is a side view of the modified embodiment, and FIG. 13 is a front view of the same. In the drawing, (1) is the mower, (2) is the machine body, and (3) is the mower. (4) is the wheel, (5) is the engine, and (6) is the cutter. (7) is a housing, and (14) is a handle. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Patent Attorney Koyama
Figure 13 procedural amendment (voluntary) dated 10/25/1980

Claims (1)

[Scope of Claims] 1. The aircraft is supported by four wheels (front, rear, left, and right), and is provided with a prime mover approximately in the center of the aircraft to drive the wheels to make it self-propel, and is capable of forward and backward movement by the wheels. , a cutter driven by the prime mover is provided below the machine body; a cutter housing that covers the cutter is provided; the housing is open so that one direction and the opposite direction thereof face each other; A power mower comprising the above-mentioned configuration requirements, which is equipped with an operating handle. 2. The power mower according to claim 1, wherein the cutter housing has open front and rear sides. 3. The power mower according to claim 1, wherein the cutter housing has left and right sides open.