JPH02115089U

JPH02115089U -

Info

Publication number: JPH02115089U
Application number: JP2393889U
Authority: JP
Priority date: 1989-03-02
Filing date: 1989-03-02
Publication date: 1990-09-14
Anticipated expiration: 2004-03-02
Also published as: JPH0710987Y2

Description

[Brief explanation of drawings]

第１図乃至第４図は本考案の一実施例を示すも
ので第１図は電動手押し車の要部を破断して示す
正面図は、第２図は第１図の側面図、第３図は駆
動機構の説明図、第４図はモータ制御機構を示す
回路図、第５図および第６図は他の実施例を示す
もので第５図は圧力センサーを２個取付けた取手
の断面図、第６図はモータ制御機構を示す回路図
である。１……フレーム、２……ハンドル、３……荷物
入、４……ボツクス、５……車輪駆動軸、６……
車輪、７……直流モータ、８……バツテリ、９…
…出力軸、１０Ａ……ギア、１０Ｂ……減速ギア
、１１……一方向クラツチ、１２……取手、１３
，１３Ａ，１３Ｂ……圧力センサー、１５……パ
ルス幅変幅器、１６……差動増幅器、１７……二
入力電圧検出素子、Ｑ１，Ｑ２……トランジスタ
。 Figures 1 to 4 show one embodiment of the present invention. Figure 1 is a front view with the main parts of the electric handcart cut away, Figure 2 is a side view of Figure 1, and Figure 3 is a side view of Figure 1. The figure is an explanatory diagram of the drive mechanism, Figure 4 is a circuit diagram showing the motor control mechanism, Figures 5 and 6 show other embodiments, and Figure 5 is a cross section of a handle with two pressure sensors attached. 6 are circuit diagrams showing the motor control mechanism. 1...Frame, 2...Handle, 3...Luggage compartment, 4...Box, 5...Wheel drive shaft, 6...
Wheels, 7...DC motor, 8...Battery, 9...
...Output shaft, 10A...Gear, 10B...Reduction gear, 11...One-way clutch, 12...Handle, 13
, 13A, 13B...pressure sensor, 15...pulse width transformer, 16...differential amplifier, 17...two-input voltage detection element, Q1, Q2...transistor.

Claims

[Claims for Utility Model Registration] (1) A frame with a luggage compartment attached, a handle attached to this frame, and a pressure sensor attached to this handle that detects the pressure when a forward force is applied. and a battery-driven motor, and a motor that is installed between the output shaft of the motor and the gear attached here, or between a reduction gear that meshes with this gear and the wheel drive shaft, and that applies a force in the reverse direction to the handle. An electric handcart comprising: a one-way clutch that transmits rotational torque of a wheel drive shaft to a motor only when the vehicle is in use; and a motor control mechanism that controls rotation of the motor based on a detection signal from the pressure sensor. (2) A motor control mechanism that is equipped with two pressure sensors that detect the pressure when forward and reverse forces are applied to the handle, and controls the rotation of the motor by detecting the pressure difference between the two pressure sensors. The electric handcart according to claim 1, further comprising:. (3) The electric handcart according to claim 2, further comprising a motor stop mechanism that stops the motor when two pressure sensors simultaneously detect a pressure higher than a specified value.