JPH0736611U - Electric mower - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the operability and work efficiency during mowing work and to reduce the feeling of fatigue given to workers. A DC electric motor in which a cutting blade 2 is attached to the tip of an operating rod 1, a front handle 4 at approximately the center, and operation switches 6 and 7 for the DC electric motor at a rear handle 5 at the rear end. In the electric lawn mower, the front handle fixing portion X in the substantially central portion of the operating rod 1 is used as a fulcrum in the housing portion of the rear handle 5 of the operating rod 1, and the cutting blade 2 and the DC electric motor at the tip end of the operating rod 1 The built-in portion 12 of the balance weight 13 for maintaining the balance with the motor is configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric mowing machine having a DC electric motor with a cutting blade attached to the tip of an operating rod, which improves operability and work efficiency during mowing work and reduces the feeling of fatigue given to the operator. It is characterized by

[0002]

[Prior art]

 As shown in FIG. 3, the electric mowers provided in the past are direct currents in which a cutting blade 2 such as a nylon cord cutter or a metal cutting blade is attached to the tip of an operating rod 1 having a predetermined length. A motor housing 3 containing an electric motor is provided, a front handle 4 is attached to a substantially central portion of the operating rod 1, and a rear handle 5 provided at a rear end of the operating rod 1 has a trigger switch 6 and A trigger lockout switch 7 and the like are provided, and a wiring cable 9 extending from a battery 8 as a power source is connected to the rear handle 5 via a male connector 10.

An operator holds a battery 8 as a power source on his waist or back, holds a front handle 4 and a rear handle 5 of the operating rod 1 in his hand, and a trigger switch 6 and a trigger provided on the rear handle 5. The lockout switch 7 was operated, and the operation rod 1 was operated with the mounting portion X of the front handle 4 as a fulcrum to perform mowing work and the like.

[0004]

[Problems to be solved by the device]

 In the conventional electric mower having the above structure, the cutting blade 2 provided at the tip of the operating rod 1 and the motor housing 3 side having the built-in direct current electric motor are heavy, and the rear handle 5 is light. The weight balance between the front end and the rear end of the rod 1 becomes unbalanced, and the tip of the operating rod 1 feels very heavy. As a result, the operability of the operating rod 1 is poor and the grass cutting work is not progressing well. There was also the problem of giving a great deal of fatigue to the worker.

The present invention has been made in view of the above circumstances. It is possible to maintain the balance between the front end and the rear end of the operating rod during mowing work, and to improve the operability and work efficiency during mowing work. An object of the present invention is to provide an electric mower that can reduce the feeling of fatigue given to workers.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a DC electric motor having a cutting blade attached to the tip of an operating rod, a front handle at approximately the center, and an operation switch for the DC electric motor at the rear handle of the rear end. In the electric mower, the balance between the cutting rod and the DC electric motor at the tip of the operating rod is set in the housing of the rear handle of the operating rod with the front handle fixing part at the approximate center of the operating rod as the fulcrum. The balance weight built-in portion for holding the balance weight is configured.

[0007]

[Action]

 In the electric mower of the present invention, a balance weight 13 having a predetermined weight is housed in a built-in portion 12 of the balance weight formed in the housing portion of the rear handle 5 of the rear end portion of the operating rod 1.

That is, according to the present invention, even when an operator holds the front handle 4 and the rear handle 5 in his / her hands, the cutting blade 2, the DC electric motor and the motor housing 3 at the tip of the operating rod 1 are operated. The weight of the side and the rear end of the rear handle 5 in the housing is balanced and hung.

Therefore, it is possible to improve the operability and the work efficiency during the mowing work, and at the same time, the operator is less likely to feel tired.

Further, if the battery-remaining amount alarm indicator 19 and the battery-remaining amount alarm control circuit 20 are provided in the rear handle portion 5, it is possible to prevent the battery 8 from being used beyond its capacity, so that the battery- It does not promote the deterioration of No. 8 and does not lower the work efficiency.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view showing an embodiment of the electric mower of the present invention, FIG. 2 is a partially cutaway side view of a housing portion of a rear handle, and FIG. 3 is a schematic view showing a conventional electric mower. It is a side view.

The electric mower of the present invention shown in FIGS. 1 and 2 has substantially the same configuration as that of the conventional electric mower shown in FIG. 3, and the same components are designated by the same reference numerals. It will be explained below.

In the figure, reference numeral 1 denotes an operating rod, which has a predetermined length and is made of a hollow material, and a wiring cable 15 to be described later is inserted inside the operating rod 1.

Reference numeral 2 denotes a cutting blade such as a nylon cord cutter or a metal cutting blade, which has a built-in DC electric motor for driving the cutting blade 2 and a motor housing 3 integrally formed with the cover of the cutting blade 2, It is provided at the tip of the operating rod 1.

Reference numeral 4 denotes a front handle, which is attached in a shape orthogonal to a substantially central portion of the operation rod 1, and is a loop-shaped handle as long as it can be gripped by an operator to ensure the operability of the operation rod 1. It may have any other shape.

Reference numeral 5 denotes a rear handle, which is provided at the rear end of the operating rod 1 and which operates the start and stop of the DC electric motor as in a conventional electric mower, and a trigger switch 6 and a trigger lockout switch 7. Is provided.

The trigger lockout switch 7 is a safety mechanism configured so that an operator cannot operate the trigger switch 6 unless the operator holds the trigger lockout switch 7.

Reference numeral 8 denotes a large-capacity battery as a power source, and a wiring cable 9 extended from the battery 8 is connected to a female connector 11 at the rear end of the rear handle 5 via a male connector 10. ing.

Since the present invention uses the large-capacity battery 8, an operator holds the battery 8 on his waist or back to perform grass cutting work.

In the present invention, the storage part 12 of the balance weight 13 is formed in the housing part of the rear handle 5.

That is, as shown in FIGS. 1 and 2, the rear portion of the housing of the rear handle 5 is made slightly larger and the balance weight 13 is made of an iron block material or the like. Two weights 13 are built in and fixed by engaging the ribs 14 at their four corners.

Reference numeral 15 in the drawing denotes a wiring cable, which is connected to a wiring cable 9 extended from the battery 8 through a male connector 10 and a female connector 11, and further, through a hollow portion of the operating rod 1. It is connected to a DC electric motor in a motor housing 3 provided at the tip of the operating rod 1.

Reference numeral 16 denotes a female screw hole used when closing the built-in portion 12 of the balance weight 13, 17 denotes a cover for closing the housing portion of the rear handle 5 and the built-in portion 12 of the balance weight 13, and 18 denotes That is the fixing screw.

Further, 19 is a battery-remaining amount alarm indicator provided at a position where the operator of the rear handle 5 can easily see, and 20 is a battery-remaining amount alarm control circuit provided inside the housing of the rear handle 5. The battery-remaining amount alarm control circuit 20 is configured to constantly detect the terminal voltage of the battery-8 and send an alarm signal to the battery-remaining amount alarm indicator 19 when the voltage falls below a set voltage. .

The battery / remaining amount alarm indicator 19 is specifically configured by a warning light such as a high-brightness LED or a buzzer that emits an alarm sound.

Mowing work by the electric mowing machine of the present invention having the above-mentioned configuration is the same as the conventional one. That is, the operator holds the battery 8 on his waist or back and holds the front handle 4 at the substantially central portion of the operating rod 1 and the rear handle 5 at the rear end of the operating rod 1 in his hand.

The trigger switch 6 and the trigger lockout switch 7 provided on the rear handle 5 may be operated to perform the mowing work.

In the present invention, the balance weight 13 having a predetermined weight is built in the built-in portion 12 of the balance weight 13 provided in the housing portion of the rear handle 5 of the rear end portion of the operating rod 1. In addition, the balance weight 13 uses the fixed portion X of the front handle 4 at the substantially central portion of the operating rod 1 as a fulcrum, and connects the cutting blade 2, the DC electric motor and the motor housing 3 at the tip of the operating rod 1. It is a weight that maintains balance.

Therefore, unlike a conventional electric mower, a cutting blade 2 such as a nylon cord cutter or a metal cutting blade provided at the tip of the operating rod 1, a DC electric motor and a motor housing 3, and the operating rod 1 are provided. The balance of the rear handle 5 provided at the rear end portion with the housing portion is suspended with the fixed portion X of the front handle 4 in the substantially central portion of the operating rod 1 as a fulcrum.

The front handle 4 can be moved at its mounting position according to the operator. Therefore, when the mounting position of the front handle 4 is moved, the weight of the balance weight 13 may be adjusted according to the movement.

As described above, according to the present invention, although the total weight of the electric mower is increased by the weight of the balance weight 13, as described above, the operator can use the housings of the front handle 4 and the rear handle 5 for the housing. Even when you work while holding the part, the front end and the rear end of the operating rod 1 can be balanced, operability and work efficiency can be improved, and further, the feeling of fatigue given to the operator can be improved. Can be reduced.

Further, if a battery-remaining amount alarm indicator, a battery-remaining amount alarm control circuit, etc. are provided on the rear handle portion, deterioration of the battery is not promoted and work efficiency can be reduced. There is no such thing.

[0034]

[Effect of device]

 According to the present invention, since the imbalance between the front end and the rear end of the operating rod can be eliminated by using the front handle fixing portion as a fulcrum, it is possible to improve operability and work efficiency during mowing work. At the same time, the feeling of fatigue given to the worker can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the electric mower of the present invention.

FIG. 2 is a partially cutaway side view of a housing portion of the rear handle of FIG.

FIG. 3 is a schematic side view showing a conventional electric mower.

[Explanation of symbols]

 1 Operation Rod 2 Cutting Blade 3 Motor Housing 4 Front Handle 5 Rear Handle 13 Balance Weight

Claims (1)

[Scope of utility model registration request] 1. An electric lawn mower having a DC electric motor having a cutting blade attached to the tip of an operating rod, a front handle at approximately the center, and a switch for operating the DC electric motor provided at the rear handle of the rear end. A balance for maintaining the balance between the cutting blade and the DC electric motor at the tip of the operating rod, with the front handle fixing portion at the substantially central portion of the operating rod as a fulcrum in the housing of the rear handle of the operating rod. An electric mower characterized by comprising a built-in part of a weight.