履带摆动式过障碍防卡死爬楼轮椅

Abstract

本实用新型涉及轮椅技术领域，提供了一种履带摆动式过障碍防卡死爬楼轮椅具有平地行走姿态及台阶行走姿态；包括椅架，椅架上设有座板和靠背；椅架的前端安装有两个前轮；椅架上设有倾倒转轴；倾倒转轴的两端分别固接一后轮腿，后轮腿上安装有后轮；椅架上还安装有倾倒电缸；椅架的侧后部安装有两组倾斜设置的履带架；履带架上安装有履带；两履带架之间还安装有用于驱动两履带同步转动的爬楼电机；两履带架倾斜向下的一端延伸到两前轮之间所形成的空间区域内。借此，本实用新型的前轮压到障碍物时，向上抬起，履带架的下端随之抬起；通过后，前轮下降接触地面，履带架的下端随之下降，避免出现被障碍物卡死的现象。

Claims

1. A tracked, swing-type obstacle-crossing, anti-jamming, stair-climbing wheelchair, having both flat-ground walking and stair-climbing postures; comprising a chair frame, wherein a seat and a backrest are provided on the chair frame; two front wheels are mounted on the front end of the chair frame; a tilting pivot is provided on the chair frame; a rear wheel leg is fixedly connected to each end of the tilting pivot, and a rear wheel is mounted on the rear wheel leg; the chair frame is also equipped with a tilting electric cylinder for driving the tilting pivot to rotate in both directions; characterized in that, Two sets of inclined track frames are installed on the side and rear of the chair frame; tracks are installed on the track frames; a stair-climbing motor for driving the two tracks to rotate synchronously is also installed between the two track frames; the downward inclined end of the two track frames extends into the space area formed between the two front wheels. The chair frame is equipped with a fulcrum shaft, and both track frames are rotatably connected to the fulcrum shaft; the lower end of each track frame can reciprocate around the fulcrum shaft; specifically: When the stair-climbing wheelchair switches from a flat-ground walking posture to a stair-walking posture, the lower end of the track frame swings downward. When the stair-climbing wheelchair switches from a stair-walking posture to a flat-ground walking posture, the lower end of the track frame swings upward to return to its original position. Two downward pressing cams are fixedly sleeved on the tilting shaft; the track frame is provided with a follower wheel for rolling contact with the downward pressing cam on the corresponding side; a return spring is connected between the track frame and the chair frame; the downward pressing cam has a protrusion; The stair-climbing wheelchair switches from a flat-ground walking posture to a stair-step walking posture: the tilting pivot rotates, the protrusion of the downward pressing cam contacts the follower wheel, causing the track frame to swing downward around the pivot axis; When the stair-climbing wheelchair switches from a stair-walking posture to a flat-ground walking posture: the tilting pivot rotates in the opposite direction, the return spring contracts and pulls the track frame to swing upward around the fulcrum until it returns to its original position.

2. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair according to claim 1, wherein, When the stair-climbing wheelchair is in a flat walking posture, the distance between the lower end of the track frame and the lowest point of the front wheel should not be less than 3.5cm.

3. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair of claim 2, wherein, When the stair-climbing wheelchair is in a flat walking posture, the distance between the lower end of the track frame and the lowest point of the front wheel is 5-10cm.

4. The tracked swing-type obstacle-crossing, anti-jamming, stair-climbing wheelchair as described in claim 1, characterized in that, The downward pressing cam also has a recessed arc-shaped limiting part for engaging with the outer circumference of the follower wheel.

5. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair according to claim 4, wherein The protrusion and the limiting part have an arc-shaped transition structure.

6. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair of claim 1, wherein, A drive arm is fixed on the tilting shaft; the cylinder body of the tilting electric cylinder is rotatably connected to the drive arm, and the telescopic part of the tilting electric cylinder is rotatably connected to the chair frame.

7. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair according to any one of claims 1 to 6, wherein The stair-climbing motor is driven by a track drive shaft, and the two ends of the track drive shaft are respectively driven by the tracks on the track frame on the corresponding side.

8. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair of claim 7, wherein, The track frame has a bent transition structure, and a pressing wheel for pressing the track is provided in the concave position of the bent transition structure.

9. The caterpillar swing-over obstacle preventing dead-locking stair climbing wheelchair according to claim 8, wherein, The convex part of the bent transition structure is provided with a load-bearing wheel.

10. The caterpillar swing-over obstacle preventing stuck climbing stair wheelchair of claim 7, wherein, A reinforcing shaft is also connected between the two track frames.

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