CN103735375B - Electric wheelchair direction movement shifter - Google Patents

Abstract

The invention relates to a universal movement conversion mechanism for an electric wheelchair, which includes a rotating shaft fixing plate, a universal load-bearing wheel mounting part, a universal load-bearing wheel, a mounting cylinder, a strut, a footboard, a top block, and a rotating shaft. It is characterized in that: two pieces The rotating shaft fixing plate and the two installation cylinders are respectively fixedly connected to the base of the electric wheelchair, the rotating shaft passes through the rotating shaft fixing plate, and the two ends of the rotating shaft are respectively fixedly connected to the pedals, and the upper end of the installation cylinder is provided with a top block, and the top block is fixedly connected to the On the rotating shaft, the strut is connected with the spring in the installation cylinder, the lower end of the strut passes through the installation cylinder and is fixedly connected with the universal load-bearing wheel mounting piece, the upper end surface of the strut is connected with the top block, and the universal load-bearing wheel is installed under the universal load-bearing wheel mounting piece wheel. The invention can conveniently realize the conversion from electric movement to universal movement of the electric wheelchair.

Description

Electric wheelchair universal movement conversion mechanism

technical field

The invention relates to a universal movement conversion mechanism for an electric wheelchair, and is particularly suitable for an electric wheelchair driven by a rear wheel.

Background technique

With the aging of my country's population and other accidents, more and more people have limb dysfunction and need to use wheelchairs as a means of transportation. In wheelchairs, more and more users tend to use electric wheelchairs. Electric wheelchairs have the characteristics of labor-saving and comfortable, but to a certain extent, there are problems such as inconvenient steering, difficulty in translation and lateral movement. It is very difficult to transfer the wheelchair and the wheelchair to a safe and suitable position, and it is difficult for one person to achieve it. And so far there is no electric wheelchair at home and abroad that can reasonably solve the above problems.

Contents of the invention

In order to solve the problem of inconvenient transfer of electric wheelchairs in some special cases, the present invention provides a universal movement conversion mechanism for electric wheelchairs, which can conveniently realize the conversion from electric movement to universal movement of electric wheelchairs.

In order to achieve the above object, the technical solution of the present invention is: an electric wheelchair universal movement conversion mechanism, comprising a rotating shaft fixing plate, a universal load-bearing wheel mounting part, a universal load-bearing wheel, a mounting cylinder, a strut, a pedal, a top It is characterized in that: two rotating shaft fixing plates and two mounting cylinders are respectively fixedly connected to the base of the electric wheelchair, the rotating shaft passes through the rotating shaft fixing plate, the two ends of the rotating shaft are respectively fixedly connected to the pedals, and the upper end of the mounting cylinder is set There is a top block, and the top block is fixedly connected to the rotating shaft. The spring is used to connect the strut in the installation tube. Install the swivel load wheels under the load wheel mounts.

When the foot pedal is stepped on, the top block rotates and presses down the strut to the fixed point, and stops at the fixed point, the rear wheel of the electric wheelchair is pried up and suspended, and the four universal wheels of the electric wheelchair are kept on the ground.

When the pedal is lifted upwards, the top block rotates in the opposite direction, and the strut moves upwards under the action of the spring, so that the universal load-bearing wheels are retracted, and the rear wheels of the electric wheelchair land on the ground.

The beneficial effects of the present invention are:

Step on the foot pedal of the present invention to drive the rotating shaft to rotate to drive the top block to rotate, and press down the strut. Due to the principle of leverage and human biomechanics, the force required to step down is not large until the dead point of the top block rotation, so as to achieve prying. The electric wheelchair reaches the effect that the rear wheels are suspended in the air. After the rear wheel is suspended, the principle of the dead point of the cam mechanism has been reached due to the relationship between the top block and the strut. No matter how much force the strut receives, the top block will still stop at the current position and keep the four universal wheels of the electric wheelchair on the ground. At this time, as long as you lift the pedal with your feet, the dead center balance of the top block will be destroyed. Under the action of the gravity of the wheelchair and the spring force in the installation tube, the top block will return to its position, and the universal load-bearing wheels will be put away. Electric wheelchair with rear wheels.

The invention can conveniently realize the conversion from electric movement to universal movement of the electric wheelchair.

Description of drawings

Fig. 1 is a schematic perspective view of the structure of the present invention;

Fig. 2 is the unconverted schematic diagram that the present invention is contained on the electric wheelchair;

Fig. 3 is the schematic diagram that the present invention is converted into universal movement on the electric wheelchair;

Figure 4 is a schematic cutaway diagram of the cam mechanism of the universal movement conversion mechanism structure of the electric wheelchair

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention is described further:

As shown in Figures 1 and 4, an electric wheelchair universal movement conversion mechanism includes a rotating shaft fixing plate 1, a universal load-bearing wheel mounting part 2, a universal load-bearing wheel 3, a mounting cylinder 4, a strut 5, and a pedal 6 , Top block 7, rotating shaft 8, spring 9 and other components.

Two rotating shaft fixing plates 1 and two mounting cylinders 4 are respectively fixedly connected to the base of the electric wheelchair, the rotating shaft 8 passes through the rotating shaft fixing plate 1, and the two ends of the rotating shaft 8 are fixedly connected to the pedals 6 respectively. Jacking block 7, and jacking block 7 is fixedly connected on the rotating shaft 8, and strut 5 is connected through spring 9 in installation cylinder 4, and the lower end of strut 5 passes installation cylinder 4 and is fixedly connected with universal load-bearing wheel mounting part 2, and strut 5 The upper end surface is contacted and connected with the top block 7, and the universal load-bearing wheel 3 is installed below the universal load-bearing wheel mounting part 2.

The user steps on the pedal 6 to drive the rotating shaft) to rotate to drive the top block 7 to rotate, and presses down the strut 5 until the relationship between the top block 7 and the strut 5 reaches its dead point (fixed point), and the universal load-bearing wheel 3 Press down to jack up the electric wheelchair so as to achieve the effect of prying up the electric wheelchair to achieve the suspension of the rear wheels. After the rear wheel is suspended in the air, because the relationship between the top block 7 and the strut 5 has reached the principle of the dead point of the cam mechanism as shown in Figure 4, the top block 7 stops at the current position and keeps the four universal wheels of the electric wheelchair on the ground, as shown in the figure 2 shown.

As long as the pedal 6 is lifted with the feet, the dead center balance of the top block 7 will be destroyed. Under the action of the gravity of the wheelchair and the spring force of the inner spring of the installation tube 4, the top block 7 will return to its original position, and the universal load-bearing wheels will be retracted. 3. Put down the rear wheel of the electric wheelchair. The electric wheelchair returns to the original electric state as shown in Figure 3.

Claims (3)

1. an electric wheelchair direction movement shifter, including turning axis fixing plate (1), universal BOGEY WHEEL installed part (2), universal BOGEY WHEEL (3), mounting cylinder (4), strut (5), pedal (6), jacking block (7), rotating shaft (8), it is characterized in that: two pieces turn axis fixing plate (1) and two mounting cylinders (4) are respectively fixedly connected with on the base of electric wheel-chair vehicle, rotating shaft (8) is through turning axis fixing plate (1), rotating shaft (8) two ends are respectively fixedly connected with pedal (6), mounting cylinder (4) upper end is provided with jacking block (7), and jacking block (7) is fixedly connected in rotating shaft (8), strut (5) is connected by spring (9) in mounting cylinder (4), strut (5) lower end is connected through mounting cylinder (4) and universal BOGEY WHEEL installed part (2) are fixing, strut (5) upper surface contacts connection with jacking block (7), universal BOGEY WHEEL installed part (2) universal BOGEY WHEEL (3) installed below.

2. electric wheelchair direction movement shifter according to claim 1, it is characterized in that: when stepping on pedal (6), described jacking block (7) rotates pressure strut (5) to fixing point, and it is parked in fixing point position, electric wheelchair back wheels of vehicle levers up unsettled, and keeps four universal wheels of electric wheel-chair vehicle to land.

3. electric wheelchair direction movement shifter according to claim 1, it is characterised in that: when being lifted up pedal (6), described jacking block (7) rotates backward, strut (5) is under spring (9) acts on, moving up, make universal BOGEY WHEEL (3) pack up, electric wheelchair back wheels of vehicle lands.