The principle of twisting the car
Research on the Forward (Backward) Principle of Twisted Car
1, research motivation
One day, I saw the two-year-old son of the teacher playing a twist-and-twist car. The structure of the twist-and-twist car is simple and requires no electricity. The motor can move forward, backward, and turn in place. A small force, can carry a teacher of 65㎏, constantly twisting and twisting to make a zigzag forward, it is really amazing! Let us want to understand: the principle of twisting the car forward (backward) (Fig.01) .
2, experimental equipment
Fig (Fig.02,03,04,05), sorted out the following table:
用途 Number of products
One twist car with a net weight of 4.7㎏ and a weight resistance of 120㎏
1212 sheets of carbon paper in A4 size. Measure the movement trajectory
One level and two directions to check whether the floor is level
2 large right-angle plates with scale measurement dimensions
Weightlifting replaces human weight with 4 discs total weight 32.7㎏
Digital weight scale 1 weighing 136㎏, minimum scale 0.05㎏ measures the forward force of the wheel
1 scale weighing 3㎏, minimum scale 0.1 刻度, measuring horizontal tension spring scale
1 scale weighs 10㎏, minimum scale 0.1㎏ measures horizontal tension
3, Experimental device:
说明 [Explanation]: The bottom view of the twist car (not to scale), where
1. A, B are the front wheels, C, D are the rear wheels, and the center of the circle K is the shaft.
Heading points to the shaft.
2.R is the distance from the shaft to the handle, and the front wheel uses R as the radius, which can be rotated in a circle.
3.If the handle is " W '' with your eyes, turning the handle will move the car forward (Fig.06,07,08).
4. Look at the handle as " M '', if you turn the handle, you can twist the car back (Fig.09,10,11).
5. The front wheel and shaft of the twisted car are about " regular triangle '' after measurement, the position of the vertex is the shaft, and the bottom corners are the positions of the front wheels.
6. The angle between the force F in the tangential direction and the direction of the wheel is always 60 ° regardless of whether the twisting car is moving forward or backward.
7.When a twister is operated by a person, the position of the center of gravity will be changed by turning the handle. In order to be objective, the undergraduate exhibition uses 4 weight-suspending discs for a total of 32.5kgw, which are fixed on the twister seat and off the wheel Vertical 6.5㎝.
1, research motivation
One day, I saw the two-year-old son of the teacher playing a twist-and-twist car. The structure of the twist-and-twist car is simple and requires no electricity. The motor can move forward, backward, and turn in place. A small force, can carry a teacher of 65㎏, constantly twisting and twisting to make a zigzag forward, it is really amazing! Let us want to understand: the principle of twisting the car forward (backward) (Fig.01) .
2, experimental equipment
Fig (Fig.02,03,04,05), sorted out the following table:
用途 Number of products
One twist car with a net weight of 4.7㎏ and a weight resistance of 120㎏
1212 sheets of carbon paper in A4 size. Measure the movement trajectory
One level and two directions to check whether the floor is level
2 large right-angle plates with scale measurement dimensions
Weightlifting replaces human weight with 4 discs total weight 32.7㎏
Digital weight scale 1 weighing 136㎏, minimum scale 0.05㎏ measures the forward force of the wheel
1 scale weighing 3㎏, minimum scale 0.1 刻度, measuring horizontal tension spring scale
1 scale weighs 10㎏, minimum scale 0.1㎏ measures horizontal tension
3, Experimental device:
说明 [Explanation]: The bottom view of the twist car (not to scale), where
1. A, B are the front wheels, C, D are the rear wheels, and the center of the circle K is the shaft.
Heading points to the shaft.
2.R is the distance from the shaft to the handle, and the front wheel uses R as the radius, which can be rotated in a circle.
3.If the handle is " W '' with your eyes, turning the handle will move the car forward (Fig.06,07,08).
4. Look at the handle as " M '', if you turn the handle, you can twist the car back (Fig.09,10,11).
5. The front wheel and shaft of the twisted car are about " regular triangle '' after measurement, the position of the vertex is the shaft, and the bottom corners are the positions of the front wheels.
6. The angle between the force F in the tangential direction and the direction of the wheel is always 60 ° regardless of whether the twisting car is moving forward or backward.
7.When a twister is operated by a person, the position of the center of gravity will be changed by turning the handle. In order to be objective, the undergraduate exhibition uses 4 weight-suspending discs for a total of 32.5kgw, which are fixed on the twister seat and off the wheel Vertical 6.5㎝.