阅读说明：本技术 一种用于推车的力感知主动电动助力装置 (Force sensing active electric power assisting device for cart ) 是由 郝阿明 孙斌 李�杰 毛峰 李张文 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种用于推车的力感知主动电动助力装置,包括车体支架,所述车体支架后侧设有推杆,所述车体支架上方安装有车体,所述车体支架下方固定连接主体框架,所述主体框架上安装有车轮,所述车轮连接驱动机构,所述驱动机构连接控制器,所述推杆上安装有应变电阻片,所述应变电阻片连接推力检测装置,所述推力检测装置连接控制器,所述控制器和驱动机构连接驱动电源,所述控制器和驱动电源安装于主体框架上。本装置可通过应变电阻片检测由于推力引起的推杆变形,推力检测装置将该变形换算成推力大小,最后通过控制器产生电机驱动电流控制电机的转距,在不改变原有使用习惯的前提下可以根据推行者的意图实现主动助力,减轻推行者的劳动强度。(The invention discloses a force sensing active electric power assisting device for a cart, which comprises a cart body support, wherein a push rod is arranged on the rear side of the cart body support, a cart body is arranged above the cart body support, a main body frame is fixedly connected below the cart body support, wheels are arranged on the main body frame and are connected with a driving mechanism, the driving mechanism is connected with a controller, a strain resistance sheet is arranged on the push rod and is connected with a thrust detection device, the thrust detection device is connected with the controller, the controller and the driving mechanism are connected with a driving power supply, and the controller and the driving power supply are arranged on the main body frame. This device accessible resistance to strain card detects because the push rod that thrust arouses warp, and thrust detection device converts this deformation into the thrust size, produces the torque of motor drive current control motor through the controller at last, can realize initiative helping hand according to the intention of the person of pushing away under the prerequisite that does not change original use habit, alleviates person of pushing away's intensity of labour.)

1. The utility model provides a power perception initiative electric power assisting device for shallow, includes the automobile body support, its characterized in that: the automobile body support rear side is equipped with the push rod, the automobile body is installed to the automobile body support top, automobile body support below fixed connection main body frame, install the wheel on the main body frame, wheel connection actuating mechanism, actuating mechanism connection director, install the resistance card that meets an emergency on the push rod, thrust detection device is connected to the resistance card that meets an emergency, thrust detection device connection director, drive power supply is connected to controller and actuating mechanism, controller and drive power supply install on main body frame.

2. A force sensing active electric power assist device for a stroller according to claim 1, characterized in that: the thrust detection device and the strain resistance sheet form a bridge circuit, the thrust detection device further comprises a signal amplification circuit and an analog-to-digital conversion circuit, the output end of the bridge circuit is connected with the signal amplification circuit, and the output end of the signal amplification circuit is connected with the analog-to-digital conversion circuit.

3. A force sensing active electric power assist device for a stroller according to claim 1, characterized in that: the middle part of the push rod is provided with a section of elastomer, and the strain resistance chip is fixed on the elastomer.

4. A force sensing active electric power assist device for a stroller according to claim 3, characterized in that: the push rods are arranged on two sides of the vehicle body support symmetrically.

5. A force sensing active electric power assist device for a stroller according to claim 3, characterized in that: the bottom of the push rod is connected with a steering shaft, the steering shaft is connected with a steering mechanism, and the steering mechanism and the steering shaft are fixed on a vehicle body support.

6. A force sensing active electric power assist device for a stroller according to claim 1, characterized in that: the driving mechanism comprises a driving motor, an electromagnetic brake and a speed reducing device, the electromagnetic brake is installed on an output shaft of the driving motor, one side of the speed reducing device is connected with the driving motor, and the other side of the speed reducing device drives wheels through a transmission mechanism.

7. A force sensing active electric power assist device for a stroller according to claim 1, characterized in that: the driving mechanisms are two, and the output ends of the speed reducing devices of the two driving mechanisms drive wheels on two sides through the transmission mechanisms respectively.

Technical Field

The invention relates to the technical field of power assisting devices of carts, in particular to a force sensing active electric power assisting device for a cart.

Background

The power assisting device of the cart is generally a power driving device, a power supply and other components which are superposed on the original basis of the cart. The cart power assisting device can be widely applied to a low-speed transportation device pushed and pulled by manpower and used for reducing the thrust strength. However, most of the existing power assisting devices for the carts are provided with finger-dialing or rotating-handle input devices, so that a user needs to change the running speed of the cart through the input devices, the operation is different from the pushing of the use habits of the traditional carts, certain learning cost is needed, the cart is inconvenient to use for the old and the children, and accidents can be caused by misoperation sometimes.

Disclosure of Invention

The invention aims to provide a force sensing active electric power assisting device for a cart, which is used for simulating the use habit of the traditional cart of people, namely pushing the cart forwards to assist the cart, pulling the cart backwards to assist the cart to retreat and automatically stopping the cart after hands are loosened, so that the problems in the background art are solved. In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electronic booster unit of initiative is felt to power for shallow, includes vehicle body support, the vehicle body support rear side is equipped with the push rod, the automobile body is installed to the vehicle body support top, vehicle body support below fixed connection main body frame, the last wheel of installing of main body frame, wheel connection actuating mechanism, actuating mechanism connection director, install the resistance card that meets an emergency on the push rod, thrust detection device is connected to the resistance card that meets an emergency, thrust detection device connection director, drive power supply is connected to controller and actuating mechanism, controller and drive power supply install on main body frame.

Preferably, the thrust detection device and the strain resistance sheet form a bridge circuit, the thrust detection device further comprises a signal amplification circuit and an analog-to-digital conversion circuit, the output end of the bridge circuit is connected with the signal amplification circuit, and the output end of the signal amplification circuit is connected with the analog-to-digital conversion circuit.

Preferably, a section of elastic body is installed in the middle of the push rod, and the strain resistance sheet is fixed on the elastic body.

Preferably, the number of the push rods is two, and the push rods are symmetrically arranged on two sides of the vehicle body support.

Preferably, the push rod is provided with one, the bottom of the push rod is connected with a steering shaft, the steering shaft is connected with a steering mechanism, and the steering mechanism and the steering shaft are fixed on a vehicle body support.

Preferably, the driving mechanism comprises a driving motor, an electromagnetic brake and a speed reducing device, the electromagnetic brake is mounted on an output shaft of the driving motor, one side of the speed reducing device is connected with the driving motor, and the other side of the speed reducing device is connected with the wheels.

Preferably, the number of the driving mechanisms is two, and the output ends of the speed reducing devices of the two driving mechanisms are respectively connected with the wheels on the two sides.

The invention has the technical effects and advantages that: the device can deform the strain resistance disc through thrust, and the thrust is converted into a digital signal through the controller to control the movement speed of the driving mechanism, so that the speed of the travel tool can be changed as required.

Drawings

FIG. 1 is a schematic structural view of the present invention in example 1;

FIG. 2 is a schematic structural view of the present invention in example 2;

fig. 3 is a circuit diagram of the operation of the strain resistance chip of the invention.

In the figure: 1-vehicle body support, 2-push rod, 3-vehicle body, 4-main body frame, 5-wheel, 7-driving mechanism and 8-strain resistance chip.

Detailed Description

In the description of the present invention, it should be noted that unless otherwise specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

Example 1

As shown in fig. 1, a force sensing active electric power assisting device for a cart comprises a vehicle body support 1, wherein a steering mechanism and a steering shaft are mounted on the vehicle body support 1, and the steering mechanism and the steering shaft are commonly used in a vehicle, and belong to the prior art known to those skilled in the art, the steering mechanism is connected with a push rod 2 through a rotating shaft, a vehicle body 3 is mounted above the vehicle body support 1, a main body frame 4 is fixedly connected below the vehicle body support 1, wheels 5 are mounted on the main body frame 4, the wheels 5 are connected with a driving mechanism 7 and a steering mechanism, the driving mechanism 7 is connected with a controller, a section of elastic body is mounted in the middle of the push rod 2, a strain resistance sheet 8 is bonded on the front and rear surfaces of the elastic body, the strain resistance sheet 8 is connected with a thrust detection device, and the thrust detection device is connected with the controller, the controller and the driving mechanism 7 are connected with a driving power supply, the controller and the driving power supply are installed on the main body frame 4, the thrust detection device and the strain resistance sheet 8 form a bridge circuit, the thrust detection device further comprises a signal amplification circuit and an analog-to-digital conversion circuit, the output end of the bridge circuit is connected with the signal amplification circuit, the output end of the signal amplification circuit is connected with the analog-to-digital conversion circuit, one driving mechanism 7 is arranged, the driving mechanism 7 comprises a driving motor, an electromagnetic brake and a speed reduction device, the electromagnetic brake is installed on an output shaft of the driving motor, one side of the speed reduction device is connected with the driving motor, and the other side of the speed reduction device drives the wheels 5 on two sides simultaneously through a transmission mechanism. When the device is used, as shown in fig. 3, a user pushes the push rod 2, the push rod 2 is elastically deformed, the deformation of the push rod 2 causes the deformation of the strain resistance chip 8, so that the resistance of the strain resistance chip 8 is changed, the resistance change of the strain resistance chip 8 is larger as the thrust is larger, the bridge circuit converts the resistance change of the strain resistance chip 8 into voltage change, the voltage change is amplified by a signal amplifying circuit of a controller and is converted into digital quantity by an analog-to-digital conversion circuit, the digital quantity is converted into a thrust magnitude signal through mathematical operation of the controller, the thrust magnitude signal is transmitted to the driving mechanism 7 through the controller, and the driving mechanism 7 outputs corresponding torque, so that the effect of active power assistance is realized.

Example 2

As shown in fig. 2, the force sensing active electric power assisting device for a cart comprises a body frame 1, two push rods 2 are respectively connected to two sides of the body frame 1, a cart body 3 is installed above the body frame 1, a main body frame 4 is fixedly connected below the body frame 1, wheels 5 are installed on the main body frame 4, the wheels 5 are connected with a driving mechanism 7, the driving mechanism 7 is connected with a controller, a section of elastic body is installed in the middle of the push rods 2, strain resistance sheets 8 are bonded to the front and rear surfaces of the elastic body, the strain resistance sheets 8 are connected with a thrust detection device, the thrust detection device can also detect the difference of thrust force received by the two push rods 2 according to the strain resistance sheets 8, the thrust detection device is connected with the controller, the controller and the driving mechanism 7 are connected with a driving power supply, and the controller and the driving power supply are installed on the main body frame 4, the thrust detection device and the strain resistance sheet 8 form a bridge circuit, the thrust detection device further comprises a signal amplification circuit and an analog-to-digital conversion circuit, the output end of the bridge circuit is connected with the signal amplification circuit, the output end of the signal amplification circuit is connected with the analog-to-digital conversion circuit, two driving mechanisms 7 are arranged, each driving mechanism 7 comprises a driving motor, an electromagnetic brake and a speed reduction device, the electromagnetic brakes are mounted on the output shafts of the driving motors, one side of each speed reduction device is connected with the driving motor, and the other side of each speed reduction device drives the wheels 5 on two sides through a transmission mechanism. When the device is used, as shown in fig. 3, a user pushes a push rod 2, the push rod 2 is elastically deformed, the deformation of the push rod 2 causes the deformation of a strain resistance sheet 8, so that the resistance of the strain resistance sheet 8 is changed, the resistance change of the strain resistance sheet 8 is larger when the thrust is larger, a bridge circuit converts the resistance change of the strain resistance sheet 8 into voltage change, the voltage change is amplified by a signal amplifying circuit of a controller and converted into digital quantity by an analog-to-digital conversion circuit, the digital quantity is converted into a thrust magnitude signal through mathematical operation of the controller, the thrust magnitude signal is transmitted to a driving mechanism 7 through the controller, the driving mechanism 7 outputs corresponding torque, so that active power assistance is realized, the device is simultaneously provided with two driving mechanisms 7, each driving mechanism 7 corresponds to one strain resistance sheet 8 respectively, when the device needs to turn, the corresponding thrust of two push rods 2 is different, thereby leading to the change of resistance of strain resistance chip 8 to be different, and the torque that corresponds 7 output after the conversion is different, thereby leading to the rotational speed of two wheels to be different, realizes that the device turns left or turns right along with the intention of the person who pushes away.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.