Electric wheelchair
First Claim
1. An electric wheelchair, comprising:
- a movable seat part fixedly connected with a bull gear in a geared motor;
a body part serving as a support for the seat part;
a seat adjustment mechanism arranged under the seat part for maintaining balance of the seat part, the bull gear driving the seat adjustment mechanism by means of a connecting device;
a bottom part arranged under the body part, and being comprised of a front portion and a rear portion, which are movably connected with a coupling arrangement and capable of deflection in a specific range of angles with respect to each other;
a crawler moving mechanism comprising two sets of crawlers arranged respectively at sides underneath the bottom part, the set of crawlers comprising;
a front crawler;
a rear crawler;
a movable stretching crawler arranged at an outside of the front crawler; and
a fixed stair-climbing crawler arranged at an outside of the rear crawler;
wherein a pulley at one end of the movable stretching crawler is fixedly connected with a pulley at a front end of the front crawler, and a free end of the movable stretching crawler is rotatable in forward or backward directions with respect to a fixed end of the movable stretching crawler within the range of 360°
by means of a control lever; and
wherein a pulley at one end of the fixed stair-climbing crawler is fixedly connected with a pulley at a rear end of the rear crawler, while a free end of the fixed stair-climbing crawler is inclined at a specific angle relative to the rear crawler; and
components for driving the set of crawlers arranged in the bottom part.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric wheelchair comprising a movable seat part (1), a body part (2) served as a support for the seat part, a seat adjustment mechanism (3) arranged under the seat part, a bottom part (4), and a crawler moving mechanism (5). The crawler moving mechanism (5) comprises two sets of crawlers arranged respectively at both sides underneath the bottom part, and each of which comprises a front crawler and a rear crawler. The bottom part (4) is comprised of a front portion and a rear portion, which are movably connected with a coupling arrangement and capable of deflection with respect to each other. The crawler moving mechanism (5) further comprises movable stretching crawlers arranged respectively at outside of the front crawler, and fixed stair-climbing crawlers arranged respectively at outside of the rear crawler, wherein a free end of the fixed stair-climbing crawler forms a specific angle relative to the rear crawler.
33 Citations
13 Claims
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1. An electric wheelchair, comprising:
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a movable seat part fixedly connected with a bull gear in a geared motor; a body part serving as a support for the seat part; a seat adjustment mechanism arranged under the seat part for maintaining balance of the seat part, the bull gear driving the seat adjustment mechanism by means of a connecting device; a bottom part arranged under the body part, and being comprised of a front portion and a rear portion, which are movably connected with a coupling arrangement and capable of deflection in a specific range of angles with respect to each other; a crawler moving mechanism comprising two sets of crawlers arranged respectively at sides underneath the bottom part, the set of crawlers comprising; a front crawler; a rear crawler; a movable stretching crawler arranged at an outside of the front crawler; and a fixed stair-climbing crawler arranged at an outside of the rear crawler;
wherein a pulley at one end of the movable stretching crawler is fixedly connected with a pulley at a front end of the front crawler, and a free end of the movable stretching crawler is rotatable in forward or backward directions with respect to a fixed end of the movable stretching crawler within the range of 360°
by means of a control lever; and
wherein a pulley at one end of the fixed stair-climbing crawler is fixedly connected with a pulley at a rear end of the rear crawler, while a free end of the fixed stair-climbing crawler is inclined at a specific angle relative to the rear crawler; andcomponents for driving the set of crawlers arranged in the bottom part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric wheelchair, comprising:
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a movable seat part; a body part serving as a support for the seat part; a seat adjustment mechanism arranged under the seat part for maintaining balance of the seat part, the seat adjustment mechanism includes a balance sensing device comprising a balance weight, and a support for supporting and allowing a swing of the balance weight;
the support being equipped with a circuitry for electrical connection with a geared motor for the seat adjustment mechanism and for electrical connection with a storage battery;a bottom part arranged under the body part, and being comprised of a front portion and a rear portion, which are movably connected with a coupling arrangement and capable of deflection in a specific range of angles with respect to each other; a crawler moving mechanism comprising two sets of crawlers arranged respectively at sides underneath the bottom part, the set of crawlers comprising; a front crawler; a rear crawler; a movable stretching crawler arranged at an outside of the front crawler; and a fixed stair-climbing crawler arranged at an outside of the rear crawler;
wherein a pulley at one end of the movable stretching crawler is fixedly connected with a pulley at a front end of the front crawler, and a free end of the movable stretching crawler is rotatable in forward or backward directions with respect to a fixed end of the movable stretching crawler within the range of 360°
by means of a control lever; and
wherein a pulley at one end of the fixed stair-climbing crawler is fixedly connected with a pulley at a rear end of the rear crawler, while a free end of the fixed stair-climbing crawler is inclined at a specific angle relative to the rear crawler; andcomponents for driving the set of crawlers arranged in the bottom part.
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13. An electric wheelchair, comprising:
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a movable seat part; a body part serving as a support for the seat part; a seat adjustment mechanism arranged under the seat part for maintaining balance of the seat part and being driven by a first geared motor, the first geared motor for driving the seat adjustment mechanism comprising an anti-reverse helical gear and a dual wing safety locking device; a bottom part arranged under the body part, and being comprised of a front portion and a rear portion, which are movably connected with a coupling arrangement and capable of deflection in a specific range of angles with respect to each other; a crawler moving mechanism driven by a second geared motor that is independent of the first geared motor, said crawler mechanism comprising two sets of crawlers arranged respectively at sides underneath the bottom part, the set of crawlers comprising; a front crawler; a rear crawler; a movable stretching crawler arranged at an outside of the front crawler; and a fixed stair-climbing crawler arranged at an outside of the rear crawler;
wherein a pulley at one end of the movable stretching crawler is fixedly connected with a pulley at a front end of the front crawler, and a free end of the movable stretching crawler is rotatable in forward or backward directions with respect to a fixed end of the movable stretching crawler within the range of 360°
by means of a control lever; and
wherein a pulley at one end of the fixed stair-climbing crawler is fixedly connected with a pulley at a rear end of the rear crawler, while a free end of the fixed stair-climbing crawler is inclined at a specific angle relative to the rear crawler; andcomponents for driving the set of crawlers arranged in the bottom part.
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Specification