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variable wheelbase frame

A frame and wheelbase technology, applied in the field of electric wheelchairs, can solve problems such as poor safety and flexibility

Active Publication Date: 2015-08-19
佛山市丰和医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the poor safety and flexibility of the existing electric wheelchair for climbing steps, the present invention adopts two measures, the first is variable wheelbase, and the other is the simultaneous use of large wheels (7 front wheels, 8 rear wheels) and swivel wheels (9)

Method used

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Embodiment Construction

[0010] The vehicle frame of this program has used the vehicle frame driving device 6, and the universal wheel has used the universal wheel driving device 5. These devices are used for the opening and closing of the vehicle frame and the lifting of the universal wheels. There are many driving devices that can accomplish these tasks, such as screw driving devices, hydraulic driving devices, pneumatic driving devices, worm and worm gear driving devices, etc. Electric or manual etc. can also be used in terms of power. The vehicle frame driving device 6 and the universal wheel driving device 5 of this example have used in existing products, a kind of screw type driving device that is called push rod motor, and this device is mainly made of motor, speed change gear, screw rod and internally threaded sleeve etc. composition. The motor drives the screw to rotate through the gear, and the screw drives the inner threaded sleeve to move linearly through the thread. Thereby promot...

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Abstract

The invention discloses a frame with a variable axle distance, and belongs to the technical field of electric wheel chairs. The conventional electric wheel chair has multiple functions of climbing stairs, but the conventional electric wheel chair is low in safety and flexibility; the conventional electric wheel chair is limited by the size and the flexibility, so that a relatively long axle distance cannot be adopted; and furthermore, in order to climb the stairs, the conventional electric wheel chair does not have relatively flexible universal wheels. In order to overcome the shortcomings of the low safety and the low flexibility of the conventional stair climbing electric wheel chair, the invention takes certain technical measures that the frame is divided into a front frame and a rear frame, wherein front wheels are arranged on the front frame, and rear wheels are arranged on the rear frame; the front frame is hinged with the rear frame; a frame driving device is arranged between the front frame and the rear frame; a retainer is hinged on a rear axle; a universal wheel bracket is hinged on the retainer; a universal wheel driving device is arranged between the retainer and the universal wheel bracket; and retaining rods are respectively hinged n the retainer and the front frame.

Description

technical field [0001] The proposal belongs to a technical field of electric wheelchairs. Background technique [0002] There are many types of electric wheelchairs in the prior art with the function of climbing steps or even stairs, but it is difficult to balance the safety and flexibility of this type of electric wheelchair, which is generally unsatisfactory. This is mainly because this type of electric wheelchair cannot adopt a longer wheelbase due to the limitation of volume and flexibility, and at the same time, this type of electric wheelchair generally cannot use more flexible universal wheels for the needs of climbing steps. We know that when the electric wheelchair crosses steps or stairs, the electric wheelchair will tilt forward or backward greatly, causing its center of gravity to deviate in an unfavorable and safe direction. At this time, due to the overall forward or backward tilt of the electric wheelchair, the vertical projection distance of its front and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61G5/10A61G5/06
Inventor 孙红英胡达广
Owner 佛山市丰和医疗科技有限公司