Shock absorbing device for medical wheelchair

Abstract

The invention discloses a shock absorbing device for a medical wheelchair, which comprises a transverse buffer frame, a main support arm, an underframe, a shock absorber platform, an auxiliary support arm, a suspended rotating structure, a sliding buffer structure and a connecting rod structure. Above the buffer frame, the suspended rotating structure is arranged between the shock absorbing platform and the horizontal buffer frame. The suspended rotating structure includes a lower vertical plate and an upper vertical plate. On the lower surface of the shock platform, a movable connection shaft is arranged between the lower vertical plate and the upper vertical plate, springs I are arranged between the four corners of the lower surface of the shock-absorbing platform and the four corners of the upper surface of the horizontal buffer frame, and the horizontal buffer frame is set on the bottom frame. directly above; the invention has a novel structural design, is safe and stable, can adapt to various road surfaces, has good balance, prevents the wheelchair from rolling over, and filters shocks in multiple directions, greatly improving the comfort of the patient.

Description

technical field [0001] The invention relates to the technical field of damping of wheelchairs, in particular to a damping device for medical wheelchairs. Background technique [0002] Wheelchairs are chairs equipped with wheels that can help replace walking, and are divided into electric and manual folding wheelchairs. It is an important mobile tool for home rehabilitation of the wounded, the sick, and the disabled, turnover transportation, medical treatment, and outing activities. The wheelchair not only meets the needs of the physically disabled and people with reduced mobility, but more importantly, it is convenient for family members to move and take care of the sick. Patients use wheelchairs for physical exercise and social activities. [0003] With the improvement of people's life, there are higher requirements for wheelchairs in the field of medical wheelchairs. It is not necessary for wheelchairs to have safe and reliable performance, but also to have a good shock a...

AI Technical Summary

Problems solved by technology

[0003] With the improvement of people's life, there are higher requirements for wheelchairs in the field of medical wheelchairs. It is not necessary for wheelchairs to have safe and reliable performance, but also to have a good shock absorption function. Medical wheelchairs are used by medical staff when caring for patients. Or the wheelchair used when moving the patient, in order to improve the comfort of the patient, the wheelchair is required to have a better damping effect, and the patent application number is CN108836658A. Two brackets are placed opposite to each other. One bracket is fixed on the wheelchair frame by bolts, and the other is fixed on the bottom of the seat by bolts. Two sliders II are installed in the brackets. The sliders II and the bracket are respectively There is a return spring, in which the two ends of the return spring are respectively fixedly connected with the slider II and the bracket, the middle parts of the two connecting rods are cross-connected through the pin shaft, and the two ends of the connecting rod are respectively rotated with the slider II in the opposite bracket. Then, when the two connecting rods rotate along the pin shaft in the middle, it will drive the slider II to move along the bracket. A pair of scissor shock absorbing mechanisms are set under the seat for shock absorption, and a multi-stage shock absorption method is adopted to To enhance the shock absorption effect, the scissor-type shock-absorbing mechanism converts the vibration in the horizontal direction into vertical vibration, increasing the vibration amplitude in the vertical direction, so the seat will have a relatively strong vibration, and the scissor-type shock-absorbing mechanism is the same as If the wheelchair frame is connected, the vibration will still be directly transmitted to the seat during the moving process of the wheelchair. The shock absorption effect is not good and cannot meet people's needs. A kind of electric wheelchair shock-absorbing suspension mechanism is disclosed in the patent application number CN210919964U. The design of the second shock absorbing spring and the second shock absorbing plate is disclosed, and the horizontal vibration of the electric wheelchair is weakened by the second shock absorbing spring and the second shock absorbing plate, so as to provide users with a more comfortable experience and further improve For the cushioning and shock absorption effect of wheelchairs, the second shock absorption spring can absorb shock in the horizontal direction, but the force of lateral tilt will be generated during the turning of the wheelchair, and only through horizontal and vertical shock absorption can not play a good role. Shock absorption, the patient is easily affected by the tilting force when turning. The vertical direction mainly relies on the damper and the first shock absorption spring for shock absorption. The vibration displacement generated by the damper and the first shock absorption spring will also be directly transmitted through the base It is for horizontal boards, so it does not have a good shock absorption effect and cannot meet people's needs

[0004] Ordinary wheelchairs have a simple structure, and only rely on shock-absorbing wheels for shock absorption, which cannot play a very good role. When the wheelchair encounters uneven roads or poor road conditions, it cannot buffer and absorb shocks, which will make the wheelchair bumpy and the ride comfort is greatly improved. The reduction will cause the user to be injured, and there is a certain safety hazard. The most important part of the wheelchair is the shock absorber. The existing shock absorber can only filter the vibration in the vertical direction, and cannot perform shock absorption in the horizontal direction. The balance is not good. Well, it is prone to tilting and overturning, which cannot meet the needs of actual use, so there is an urgent need for improved technology on the market to solve the above problems

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