JPS63177727A - Portable 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] [Industrial application field] The present invention relates to a portable brush cutter.

(Prior art) A complete transmission case is provided at the tip of the brush cutter body, and the vertical axis MA is located below the transmission case at A.2. In a portable brush cutter equipped with a rotating cutting blade body, a dish-shaped grounding body was installed at the lower center of the cutting blade body.
It is well known from 976'+ Publication etc.

(Problems to be Solved by the Invention) This type of brush cutter allows the cutting blade body at the tip of the brush cutter body to be swung from side to side while the band of the brush cutter body is worn by all operators on their shoulders. While doing so, the rotating cutting blade cuts away weeds and the like.

However, in the past, the engine was installed at the rear end of the brush cutter body, and a grounding body was installed at the bottom of the center of the cutting blade, so the worker carried out work while supporting the engine's load. so that it is close to or in sliding contact with the ground,
The operator had to support the entire weight of the brush cutter to maintain its balance, which made it extremely difficult to use and extremely tiring for long hours of work.

In view of these conventional problems, the present invention has three objectives: to enable an operator to work efficiently without having to use the entire weight of the brush cutter.

(Means for solving all the problems) The present invention provides a transmission case 1 at the tip of the brush cutter main body II+.
2)? The handle support rod 131 + 51 i protrudes upward from the transmission case 12), and a cutting blade body that rotates around the vertical axis is located on the lower side of the transmission case (2). (13) is provided, and this cutting blade body 1
13) Is there a grounding body (8) on the bottom side? The portable brush cutter has achieved the above object by implementing the following technical means.

That is, the present invention is characterized in that an engine (9) for fully driving the cutting blade body 03 is provided at the middle portion of the handle support rod +31f5) in the longitudinal direction of the rod and closer to the transmission case (2). That is to say.

(Function) During reaping work, with the grounding body (8) fully in contact with the ground,
The operator fully grasps the handle (6) of the brush cutter body il+ and assumes a fully horizontal position. Then, the cutting blade body (131) is rotated by the engine (9) to the outer cylindrical shaft (O) in the entire longitudinal direction, and the grounding body (
8) rotates or slides to move forward, backward, forward and backward 2, or move left and right, etc., and weeds and the like are cut by the cutting blade part 021 of the rotating cutting blade body (13). In this case, when moving forward or backward, the handle (61) and the grounding body (8) follow the entire ground.
Since the engine (9) is located in the middle of the handle support rods +31 to +5), the force required to lift the handle (6) is reduced.

(Example) Hereinafter, the present invention will be described in full detail with respect to the illustrated example.
In the figures to Fig. 6, Ill is the main body of the brush cutter;
Transmission case (2), connection cylinder (3), second transmission case (
41, a support rod (5), a handle 161, etc.

The lower side of the first transmission case 12i is provided with a cutting blade body 0 slightly rotating about a vertical axis 6 rotation 9 and a grounding body (8) represented by a drive wheel located below the center of the cutting blade body (13). The second transmission case (4) also has a cutting blade body 03 on the side opposite to the connecting cylinder body (3).
) A driving engine (9) is attached to the connecting cylinder 131, and a forward/reverse motor (10) for driving the grounding body (8) is attached to the connecting cylinder 131, respectively.

The first transmission case 12) is located at the lower end of the main body +1), and a connecting cylinder 131 is attached to the rear side of the first transmission case (2) so as to be inclined rearward and upward. The second transmission case (4) is located on the slope of the connecting cylinder (3).
.

A support rod (5) is attached to the lower side of the second transmission case (4) so as to be inclined rearward and obliquely upward. The support rod (51 is the second transmission case (4), the full valve is connected to the connecting cylinder (3) and the step stopper, and the second transmission case (4) is connected to the second transmission case (4).
It is attached to Ill by Kikuza Kaku et al. so that the angle can be adjusted in the vertical direction. The handle (61) is bifurcated and attached to the rear end of the support rod (6).

Note that the connecting cylinder (31 and handle support rod 15) are both handle support rods, and the former (3) is short and the latter +51
Since the engine (9) is attached to the former (3), the handle support rod (31) is longer.
+5), the engine (9) is attached to the first transmission case 12i side at the intermediate portion in the longitudinal direction of the rod.

As shown in FIGS. 2 to 4, the cutting blade body (13) has a plurality of cutting blade parts (
! 2).

Animal 6 The cutting blade body (131 consists of a disk having an upward concave portion 1161' and a truncated conical cross section in the center thereof, and a plurality of bolts (15
The cutter (717) is removably attached to the cutter (717).

As shown in FIGS. 5 and 5, the grounding body (8) is grounded within the truncated cone-shaped upward concave portion ufil of the disk by the force of the inverted U-shaped bracket Ml. The support shaft is rotatably supported at both ends by the bearing screws of Gutsukera Illη around the horizontal axis 6, and a pair of grounding bodies (81 are fitted around the support shaft ++8J so as to be integrally rotatable). A cylindrical gear case (2) having one end made of a disc material is interposed between the pair of transport bodies 12Oj, and inside this gear case , a bevel gear (c) fitted on the support shaft (181 so as to be integrally rotatable) and a bevel pinion pinion that engages with this are incorporated 1. The gear case 1 is fixed to the bracket 0η via the cylindrical body rigidity. has been done.

In the first transmission case (2), there is a fourth
As shown in the figure, the outer cylinder shaft is connected through a pair of upper and lower bearings.
7 (c) is rotatably supported around the vertical axis 6, and the intermediate cylinder shaft ρ9) is located within the outer cylinder shaft sill, and the inner shaft 13Tl++ is located within the intermediate cylinder shaft e9), which are concentric and relatively rotatable. It is inserted freely. A bevel gear (3
1; but a cutting blade body (13) is provided at the lower end thereof so as to be rotatable together with each other. An operating lever plate is fixed to the upper end of the intermediate cylinder shaft (29), and a bracket t171 of the grounding body (8) is fixed to the lower end. Also, a bevel gear (33) is provided at the upper end of the inner shaft 130), and a bevel pinion (24) is provided at the lower end.
I is provided so as to be largely integrally rotatable. In addition, the inner shaft 1
30) is supported entirely through the lid (341Vc @ receiver 135J) mounted on the first transmission case 12i.

As shown in FIGS. 4 and 7, the operating lever (321) protrudes outward through a long hole 1381'i formed circumferentially in the side wall of the first transmission case (2) over an approximately 90 degree range. This operation moves the grounding body (8) to the forward position A (imaginary line in Fig. 2), where it can move forward and backward, and to the lateral position B, where it can move left and right. 2].The operating lever □□□ can be locked at each position A and B by a positioning mechanism 1371.This positioning mechanism 137) can be changed to the first transmission case (2). ) with two pin holes formed in the side wall (3).
91, the L-shaped positioning pin 1 supported by the operating lever 3 via the bracket f4Ql', and the spring 14 that biases this positioning pin 1411 toward the first transmission case 12i side, and positioning is performed. Pin l is bottle hole +381
+391K It is said that it can be selectively engaged and disengaged.

As shown in FIGS. 4 and 6, the connecting cylinder (31 has a cylinder shaft and an inner shaft (a cylindrical shaft is fitted concentrically, and bearings t46 and t47 at both ends) make it rotatable. The supported cylindrical shaft 1431 has a bevel gear 1481 which engages with a bevel gear (33) inside the first transmission case 21, and a bevel gear 49 which engages with a bevel gear '311 within the inner shaft (44J). ) are provided for each.

As shown in FIGS. 1 and 6, the engine (9) is mounted on the second transmission case (4) on the side opposite to the connecting cylinder (3) and above the support rod (6). ) and a bracket T511, and the output shaft of this engine (9) is connected to the inner shaft (44I) by fully valve-engaging the electromagnetic clutch (53) in the housing (150). When the engine (9) is fully started, the inner shaft circle and bevel gear!
491t311, the outer cylinder shaft (c) can be fully operated to rotate the cutting blade body 03) about the vertical axis #A9. Note that the electromagnetic clutch β3) may be omitted.

The motor (10) is attached to the connecting cylinder (3) on the mounting plate (b) fixed to the connecting cylinder (31) near the second transmission case +4).
It is fixed so that it is parallel to the lower side of the . The output shaft of this motor (1o) is connected to the small diameter gear (66) and the large diameter gear (66) in the second transmission case (4) as shown in Fig. 6.
It is interlocked and connected to the cylinder shaft (43) via 511. Therefore, the output shaft (56) and the gear (56) are driven by the motor t91.
1F54, cylinder shaft (43), bevel gear 14al t3
3,1, Internal shaft condyle, bevel pinion example, bevel gear (
23), the grounding body (8) can be driven to rotate around the entire horizontal axis 6. The motor (1o) is a forward/reverse type, and the VJ switch or start switch for forward/reverse rotation of the motor (101') is located on the grip part (6) of the handle (6).
c).

The engine (9) is fully equipped with a generator, and power is supplied from the generator to the electromagnetic clutch (53) and the motor (9).

A.10 When cutting weeds, etc. using the brush cutter with the above configuration, proceed as follows.

Figure 1 shows the state in which the grounding body (8) is fully set in the horizontal position B. At this time, the positioning pin 4υ between the positioning mechanisms engages with the bottle hole (39j), and the grounding body (8) is positioned between the intermediate cylinder shafts. It is locked in the horizontal position B so that it cannot rotate.

Therefore, when working, the worker should keep the grounding body (8) fully in contact with the ground, and then attach the pair of grips (681) of the handle (6).
Hold the mower (131) in a horizontal position so that it does not fall to the left or right, rotate the cutting blade body (131) using the power from the engine (9), and operate all the switch switches on the cutter (10) as appropriate to move the front While reciprocating from side to side, the cutting blade body (13j) rotates to cut the grass.In other words, when a normal rotation command is given to the motor (101) using the changeover switch, the output shaft (55),
Gear (561 (5η, cylinder axis view, bevel gear view (33
), inner shaft 130j, bevel pinion example, bevel gear +
231, the grounding body (81 rotates in the forward direction around the horizontal axis 6 in the front-rear direction, and the front side of the brush cutter rotates in the direction of the arrow a in Fig. 8) through the support shaft +181k. Since it moves, weeds etc. are cut by the cutting blade part [12+ of the rotating cutting blade, 11 blade body 03).

After reaching a predetermined position in the left direction, when a reverse command is given to the motor (lO) using the changeover switch, the motor (lO)
101 is switched to reverse rotation, so the grounding body (8) is reversed via the aforementioned transmission system. Accordingly, the front side of the brush cutter moves in the direction indicated by the arrow b in FIG. 8, and in the same way, by rotating the cutting blade body 03), all of the weeds and the like are cut by the cutting blade portion at the outer end.

At this time, the support shaft is oriented in the front-rear direction, but the grounding body (8
) is changing from forward rotation to reverse rotation and from reverse rotation to forward rotation, is the operator on the handle (6) side? If you shake it slightly from side to side, the grounding object (
8) moves forward in a diagonal direction while moving left and right, and moves in a zigzag pattern as shown in FIG. 9, so it can reap over a constant width C.

When mowing by moving the brush cutter forward or backward, use the grounding body (
8) Change the orientation to forward position A. That is, since it is in the horizontal position B in Fig. 4, first remove the positioning pin 14 from the pin hole (arc) against the nozunenawate, and after completely releasing the lock of the operating lever country, move this operating lever country. Rotate approximately 90 degrees in the direction of arrow d in Fig. 7. Then, the grounding body (8) is rotated from the lateral position B to the forward position AI as shown by the imaginary line in Fig. 2 via the intermediate cylinder shaft 9). Since the positioning pin 1411
The operating lever is again fixed unrotatably by engaging with the VI-pin hole. The grounding body (8) is now in a forward position with its spindle end facing left and right. Therefore, if the &2 grounding body (8) is rotated in the normal direction, it will move forward, so the cutting blade body will move forward as shown in FIG. 03) allows you to cut weeds, etc. on the front side.

Even in this forward state, by rotating the motor f+01'i in the forward and reverse directions and swinging the steering wheel (61 side) slightly left and right, the vehicle can move forward and backward in a zigzag pattern to the left or right, as shown in FIG.

Figures 12 and 16 show the grounding body (8) and the wheels (
20), and a transmission mechanism (with a transmission mechanism) for transmitting the assisting force from the inner shaft f to the end of the support shaft is shown on one end side of the support shaft supported by the wheel C20]. The transmission mechanism diagram shows the lower end of the inner shaft 130) and the end of the spindle, respectively. J=
+611 tQ k and two relay pulleys 1631 are provided on the bracket aη, and a belt +651 is wound between the pulleys βυβ through all of the relay pulleys +63 and 11641.

Garden 13 The transmission mechanism (+80) in Fig. 13 is provided with a relay shaft (θη) on the bracket aη via the bearing case +661 ffi, and connects the inner shaft 19J and the relay shaft (6η) to the gear (6 barrels (69)
There is also one that is interlocked via a relay shaft (6η), a support shaft end, a bevel pinion +701, and a bevel gear (71). It's covered.

In addition, in a further embodiment, the grounding body (8) may be fixed at the forward position or at the lateral position B, and may only be able to move forward and backward or left and right. The reed and grounding body (8) may be in the shape of a dish-shaped sliding body.

The cutting height can also be adjusted by dividing the cutter blade 1 in the cutting blade body into a plurality of pieces in the same direction so that the attachment positions can be changed on both the upper and lower sides of the disk attachment part (I4).

In addition, instead of a disc, the cutting blade body α slope is formed by forming an upward concave portion 1161 in the center of a band-like grade, and attaching a cutter (71?) to the outer end of the grade, and attaching the central part of the grade to an outer cylinder It may be fixed to the axis.

〔Effect of the invention〕

According to the present invention, the cutting blade body 031'! il-engine for driving (9
).
When the ground body (8) on the lower side of the cutting blade body follows the entire ground, the engine (91 is the handle support rod 1) for the cutting blade body 03).
31 i1 + 10 Since it is located halfway through the rod length and on the transmission case i2 side, most of the weight of the engine (9) acts on the grounding body (8) side, which reduces the force of lifting the handle (61) and makes the work easier. can be done very easily and easily.

That is, by having the weight of the engine (9) on the ground contacting body (8) side, the operator does not need to know the entire weight of the brush cutter metal body, making the work light and easy.

[Brief explanation of the drawing]

1 to 11 illustrate one embodiment of the present invention, in which FIG. 1 is a side view of the entire brush cutter, FIG. 2 is a plan view of the front part of the brush cutter, and FIG. 6 is a side view of the entire brush cutter. is a bottom view of the same, FIG. 4 is a sectional side view of the same, FIG. 5 is a sectional front view of the grounding body portion, FIG. 6 is a cross-sectional side view of the second transmission case portion, and FIG. 7 is a positioning mechanism portion. 8 is a perspective view of the working state, FIGS. 9 to 11 are explanatory diagrams of the working state, FIG. 12 is a sectional side view showing another embodiment, and FIG. 16 is a further It is a block diagram which shows another training example meeting. Il+...Brush cutter body, 12i...First transmission case, 131...Connection cylinder, (41...Second transmission case, 15)...Support rod, (71...Blade , [+...
・Contact j9b body, (9+...engine, 101...motor, 021...mower blade section, facing...mower blade body, μs...
・Outer cylinder shaft, 29)...Intermediate cylinder shaft, 'Paulownia...Inner shaft, (
3z...operation lever, lever...positioning mechanism, (44
...Cylinder axis, (4)...Inner shaft, A...Front position, B
...Horizontal position. Patent Applicant Kubota Iron Works Co., Ltd. Special Opening HG3-177727 (6) September 16, 1988

Claims (1)

[Claims] (1) Attach the transmission case (2) to the tip of the brush cutter body (1).
), the handle support rods (3) and (5) protrude upwardly from the transmission case (2), and a shaft ( 28) A cutting blade body (13) is provided which rotates around the cutting blade body (
13) In a portable brush cutter having a grounding body (8) on the lower side, the cutting blade body is installed at the intermediate part in the longitudinal direction of the handle support rods (3) and (5) and closer to the transmission case (2). A portable brush cutter characterized in that it is equipped with an engine (9) for driving (13).