JPS6016522A - Reamer - 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 The present invention has a plurality of electric motors disposed immediately above the mowing blade, and a portable storage battery is installed behind the operation stick as a power source, thereby generating noise during mowing work. , there is no vibration, and the load on the motor is significantly reduced.
This relates to a brush cutter that can quickly respond to the situation of the cutting surface under the same working posture.

In conventional brush cutters, an engine as a power source is attached to the rear end of the operating rod that covers the transmission shaft, and the engine drives the clutch drum and the rotation in the front gear housing via the transmission shaft. By rotating the shaft and rotating the cutting blade attached directly or indirectly to this rotating shaft, 1. Weed "vines"
This type of brush cutter not only disturbs the neighborhood due to the noise and vibration generated by the engine drive, but also causes early mental and physical fatigue for the workers themselves. In addition, it requires open operating parts such as clutch shoes, clutch drums, transmission shafts, tooth zones, etc. from the engine to the blade, and also requires a mechanism to reduce and absorb the propagation of vibrations to the operator. Af! This increases labor and time due to assembly and disassembly, and furthermore, the anti-stock behavior and intermittent operation of work and stop work during work is a function of rotation, and it is also linked to the transmission shaft. Since the rotating shaft inside the gear housing is connected at a certain angle, it is difficult to make the cutting blade follow the ground condition of the cutting surface, which makes cutting work difficult depending on the location. Therefore, as a means to avoid such noise, vibration, weight increase, etc. mentioned above, a single electric motor is housed in a housing that is set above the center of the cutting blade. [2. Although a type of motor is adopted in which the cutting blade can be rotated by the rotating shaft, the structure for assembling the cutting blade to the rotating shaft is similar to that of the above-mentioned assembly inside the gear case of the engine-equipped brush cutter. Since there is no major difference in structure, even if it is possible to avoid noise and vibration during mowing work, it is difficult to say that handling during work is necessarily satisfactory. Therefore, with the intention of rectifying the various drawbacks mentioned above, this invention arranges a plurality of small electric motors immediately above the cutting blade, and each of these small electric motors drives the ``0171 sea urchin cutting blade''. While some parts are brought into frictional contact, a power source and a portable storage battery are attached to the rear of the operating ring, and the rotating shaft side and the operating frame side are connected with a universal joint or a ball joint, making it easier to use during brush cutting work. We aim to create a brush cutter that does not generate noise or vibration, can quickly respond to the conditions of the cutting surface, is easy to handle, performs mowing work satisfactorily, and is expected to reduce overall weight. This is what we are trying to provide.

Referring to the drawings below, an embodiment of the present invention will be described. A handle h and a shoulder rest are attached to the rear end of a long hollow operating ring l with a band b attached to the middle (left side in Figs. 1 to 3). A portable storage battery is mounted and fixed on the front side and the right side is the rear side. And the conductor on the m side of the small electric motor, which will be described later! The small electric motor m can be driven or stopped by operating the switching lever a. A support shaft 7 is passed through and loosely engaged with the front of a stopcock 6 having a 1-shaped cross section that is fixed to the front end of the operating ring with a screw J, and both ends of the support shaft 70 are connected to a pair of shafts at the upper tip of the bearing housing V. horizontally mounted and fastened to the fork pieces f and f,
These stopcocks 6° support shaft 7. The fork pieces f and f constitute a universal joint U. The conductive wire that can be inserted into and protruded from the through hole i formed in the stopper 6! Insert and extend into the bearing housing V,
Its tip is attached to a plurality of pieces (here -
The small electric motors m and m are connected to each other. Bearings 8° are installed above and below the bearing 1iV fixed and inserted into the upper center of the lid C, and a mounting plate /l is attached to the pin P near the outer periphery of the fixing plate IO fixed to the outer periphery of the lower end. , P, and a small electric motor m, which is fixed to the outer peripheral edge of this mounting plate // with a screw d, and below each of them are electric motors, -,
゛ A spiral spring with hanging shafts L and /, fixing rollers r and r to these electric shafts /, 2, and /2, respectively, and having one end fixed to each of the bins P and P, J, /3 (compression coil springs can also be used) the other end of the small electric motor m, m + 1 inch of salt, and these spiral springs /J, /J, respectively, rollers rt' f
! ! By springing and energizing I, the rollers r and r are constantly moved to the upright pieces V',! of their rotary disk 16! to ensure frictional contact. A spline S is carved below the rotating shaft rotatably supported by the bearing I, and the spline S is connected to the collar 7! Insert it inside, fit the center of the rotary disk /6 and the cutting blade holder 12, fit the center of the cutting blade /l into the bulge e protruding from the center lower surface of the rotary disk 16, and The rotating shaft 14 is an internal female thread, the male thread k of the center bolt is screwed in and tightened l1, and the rotating shaft/&, the rotary disk/6 cutting blade/l and the cutting blade holder 17 are integrally connected. . In addition, there is a conductor from the through hole drilled in the middle of the bearing housing V! are branched and derived and connected to the respective small electric motors m and m, 7
(Yes. In addition, a ball joint may be used for the operation ring l side and the rotating shaft lV side instead of the universal joint as shown in the figure. Note that the conductor ! is connected to the stopper 6 as shown in Figure 1.) However, as shown in Fig. y or Fig. In the figure, 20..2/ is the object of each of the lines 4', !.

In this invention! When mowing grass, vines, shrubs, etc., after installing a storage battery behind the operating stick/, and setting the changeover lever a of the changeover switch 3 to the position indicated by the solid line in Figure 1, the small electric motor nl, Since current is applied to m to simultaneously rotate rollers r and r, the rotary plate 16 is rotated via the upright piece V' that is in star contact with these rollers r and r, and a The cutting blade/male also rotates at the same time to cut down weeds, vines, and hired trees. However, a small electric motor n
Since a number of l and nl are installed around the rotation axis/q, the output of the small electric motor m/unit can be reduced, so there is no fear of burnout even when used for a long time. , each of the small JL motive m and m is a spiral spring (or compression coil spring) i3. Since the suppression letter is always applied to the rollers r and r by i3, the rollers r and rl! : There is no slippage between the upright piece V, torque is reliably transmitted to the cutting blade l/, mowing can be done quickly and reliably, and the cutting blade l/
The shock received by l is relaxed by the spiral spring /3,13 l-1
In addition to being able to avoid overloading the small electric motors m and m, the rotating shaft ia side is movably connected to the operating rod via a universal joint U or a ball joint, so the mowing surface will not be tilted, uneven, or curved. Even under such conditions, the mowing blade l/ follows the cutting surface well, and the mowing can be done satisfactorily without leaving any mowing residue.
In addition, the worker (not shown) can maintain the same posture without forcing his/her body into an unreasonable position, so there is no physical or mental fatigue, and the work can be carried out safely. It produces less noise and vibration than a brush cutter, so it does not disturb the neighborhood, and compared to conventional handling, which requires work to be interrupted and restarted due to oil.
Interrupting and resuming work can be done easily and quickly by simply operating the switching lever, making it convenient for workers to handle, and it also has fewer components compared to engine-equipped brush cutters. As a result, it is easy to assemble and disassemble (2), and the risk of failure is extremely rare, and as the weight of the brush cutter as a whole is reduced, it is easier for the operator to assemble and disassemble. It also has the characteristics of reducing fatigue and improving efficiency.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 7 is an overall front view, FIG. 2 is a vertical sectional view of main parts, FIG. 3 is a view taken along the line I-1 in FIG. A sectional view of another embodiment of the conductor insertion means at the stopper location, and the gj diagram is a sectional view of still another embodiment of the entire country.

Claims (1)

[Claims] (1) A plurality of small electric motors with pressure-biased rollers attached to a rotary disk integrated with the cutting blade and the rotary shaft are arranged around the rotary shaft, and an operation stick movably connected to the rotary shaft is equipped with a plurality of small electric motors.
A brush cutter (21) characterized by being equipped with a portable storage battery (21) A plurality of small electric motors equipped with pressurized rollers attached to a rotating disk integrated with the rotating shaft of the cutting blade are arranged around the rotating shaft. At the same time, a brush cutter is equipped with a portable storage battery on the operation stick movably connected to the rotating shaft, and the rotating shaft side and the operation stick are connected via a universal joint or a ball joint, and the operation stick is A sharp cutter (3I) characterized by a changeover switch for rotating and stopping the cutting blade installed in the middle of the cutter (3I). Brush cutter described in item 1 of the scope of the request