Combine figure 1 with figure 2 , The self-locking brake wheelchair of the present invention includes a support seat, a chair body frame, a brake mechanism and a multi-wheel transmission mechanism; the chair body frame includes a backrest 10 tube, a seat tube, an armrest 1 and a base support tube; the support seat is fixed on the chair The backrest 10 tube of the body frame and the seat tube; the armrest 1 is installed on the backrest 10 tube; the brake mechanism includes the brake elbow 2, the brake straight rod 3, the brake connector 9, the roller 8, the brake support 11, and the compression spring 7. Brake lifting pad 12, brake pad 5, brake fixed pad 13 and brake pad 5; multi-wheel transmission mechanism includes front wheels, rear wheels and anti-rolling wheels; the lower end of the backrest 10 tube is provided with a brake pad 11; backrest 10 The connection between the tube and the base support tube is provided with a rear wheel; the seat tube and the base support tube are connected with a front wheel; the base support tube extends beyond the backrest 10 tube and the base support tube is connected with an anti-turning wheel; The sum of the wheel diameter and the ground height is less than the diameter of the rear wheel; the backrest 10 of the seat frame is equipped with a brake mechanism; the brake elbow 2 is connected to the backrest 10 tube; the brake elbow 2 and the backrest 10 tube The common connection is also connected to a brake connector 9; the brake connector 9 is connected to one end of the brake straight rod 3 through a roller 8; the other end of the brake straight rod 3 is connected to a brake lift plate 12, and the brake straight rod 3 is connected to the brake lift Brake pads 11 are arranged between the brake pads 12; the brake straight rod 3 passes through the hole on the brake pad 11 to connect with the brake lift pad 12; the diameter of the brake straight rod 3 is smaller than the hole diameter of the brake pad 11; A compression spring 7 is installed between the support plate 11 and the brake lifting plate 12; the brake plate 5 is connected to the brake lifting plate 12 and the brake fixing plate 13 respectively; the brake disc 6 is arranged on the shaft of the rear wheel, and the brake disc 6 is connected to the The brake pads 5 are in contact; the maximum radius of the brake disc 6 is smaller than the radius of the rear wheel.
 As a further improvement of this embodiment, the front wheel is a universal wheel. The structure of the universal wheel allows horizontal 360-degree rotation, which facilitates the steering of the self-locking brake wheelchair.
 As a further improvement of this embodiment, the rolling block 8 is cylindrical. The structure of the slider is not limited to a cylindrical shape, and other shapes that can realize the function of the slider can be selected according to the design.
 As a further improvement of this embodiment, the width of the front end of the support seat is smaller than the width of the rear end, and the height of the front end of the support seat is lower than the height of the rear end. Two or more self-locking brake wheelchair support seats can be nested and stacked in a limited space, which greatly reduces the storage space.
 As a further improvement of this embodiment, the base support tube is further provided with a luggage rack 4, which is welded to the inner side of the base support tube. The luggage holder can hold heavy luggage, which is convenient for users to implement self-locking brake wheelchairs.
 As a further improvement of this embodiment, the joint between the armrest 1 and the backrest 10 tube is provided with a movable joint. The movable joint can be rotated upward from a horizontal angle, and the movable joint is divided into 0 to 90 degrees.
 As a further improvement of this embodiment, the base support tube is also provided with a pedal bracket; the pedal bracket is welded to the outside of the base support tube. The occupant can place his feet on the pedal bracket for easy riding.
 As a further improvement of this embodiment, a convenient basket is provided on the tube of the backrest 10. It is convenient for users to place newspapers and magazines and other reading materials for passengers to read.
 working principle:
 In the free state of the wheelchair, the brake pads 13 and the brake support pads 11 are welded to the frame, so that the brake lift pad 12 and the spring 7 in the brake pad 13 are in a compression spring state, and the brake pad 5 is in contact with the brake due to the pressure of the spring 7 Disk 6 is locked to fix the wheelchair. When you need to move, pinch the brake elbow 3 and the backrest 10, drive the roller 8 and the brake rod 3 through the brake connector 9, so that the brake lift plate 12 drives the brake pad 5 to lift up, so that the brake pad 5 and the brake disc 6 Separate, make the rear wheel in a free state and move the wheelchair as required.
 In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes. example. Any simple modifications, equivalent changes and modifications made to the above embodiments without departing from the technical solution of the present invention based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.