Knee joint power generation device based on bidirectional ball screw drive and application thereof

Patent metadata

Field	Value
Publication number	US-11045334-B2
Application number	US-201916448641-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Sep 30, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

The present disclosure discloses a knee joint power generation device based on bidirectional ball screw drive, and belongs to the field of biomechanical energy harvesting. The power generation device converts the rotary motion of the knee joint during human movement into a linear motion of the rope by the rope driving device, and then converts the linear motion into a rotary motion through a bidirectional ball screw to directly act on the motor, thereby converting the human biological energy into electric energy in the whole process to achieve power generation. The power generation device of the disclosure can meet the requirements of normal power generation during high-speed running and low-speed walking, has long-term high-efficiency and stable performance, can be easily worn on different people, has light overall weight and costs less loss of human walking metabolism.

First claim

What is claimed is:

1. A knee joint power generation device based on bidirectional ball screw drive, comprising:
a base plate, a shank plate, a left and right handed screw shaft, a right-handed nut, a left-handed nut, a generator, a coupling, a first guide rail connecting member, a second guide rail connecting member, a third guide rail connecting member, a fourth guide rail connecting member, a fixed pulley, a first wire rope, a second wire rope and two smooth shafts; wherein
the two smooth shafts and the left and right handed screw shaft are parallel to each other and are fixed on the base plate, and the two smooth shafts are respectively located on two sides of the left and right handed screw shaft;
the generator is fixed on the base plate and connected to an upper end of the left and right handed screw shaft through the coupling;
a lower end of the base plate is pivotally connected to an upper end of the shank plate, and the fixed pulley is disposed at the pivoting portion of the base plate and the shank plate;
the left and right handed screw shaft includes a left-handed threaded section and a right-handed threaded section distributed from top to bottom, the left-handed nut is disposed on the left-handed threaded section, and the right-handed nut is disposed on the right-handed threaded section;
the first wire rope has an upper end fixed to the first guide rail connecting member and a lower end fixed to the shank plate through the fixed pulley;
the second wire rope has an upper end fixed to the fourth guide rail connecting member and a lower end fixed to the shank plate through the fixed pulley; and
at least one of the first wire rope and the second wire rope is wound around the pulley by one lap.

2. The knee joint power generation device based on bidirectional ball screw drive according to claim 1 , wherein the fixed pulley is a double-layer pulley member, and the first wire rope and the second wire rope each occupy one layer.

3. The knee joint power generation device based on bidirectional ball screw drive according to claim 1 , further comprising:
a joint connecting member, through which the shank plate is pivotally connected to the base plate; and
array mounting holes provided on the shank plate,
wherein the joint connecting member has an upper end pivotally connected to the base plate and a lower end fittingly fixed to different holes of the array mounting holes to adapt to different leg lengths.

4. The knee joint power generation device based on bidirectional ball screw drive according to claim 3 , wherein the fixed pulley, the joint connecting member and the shank plate are detachably connected to accommodate shanks with different thicknesses by adjusting the stacking order at the connecting portion.

5. The knee joint power generation device based on bidirectional ball screw drive according to claim 1 , further comprising:
a shank fixing side plate; and
a thigh fixing side plate;
wherein the shank fixing side plate is mounted on the shank plate, the thigh fixing side plate is mounted on the base plate, and both the shank fixing side plate and the thigh fixing side plate are provided with holes for mounting straps.

6. The knee joint power generation device based on bidirectional ball screw drive according to claim 1 , further comprising:
ball bearings through which the first guide rail connecting member, the second guide rail connecting member, the third guide rail connecting member and the fourth guide rail connecting member are connected to the corresponding smooth shafts.

7. The knee joint power generation device based on bidirectional screw drive according to claim 1 , wherein the device is worn on a human joint or an animal joint to generate electricity.

8. The use of the knee joint power generation device based on bidirectional screw drive according to claim 2 , wherein the double-layer pulley member is fixedly or integrally formed with the joint connecting member.

Assignees

• Univ Huazhong Science Tech

Inventors

• Xiong Caihua
• Huang Zhongkui
• Fan Jun
• Chen Wenbin

Classifications

• F03G5/063 Primary

  operated by the leg or foot · CPC title

• A61F2/68 Primary

  Operating or control means · CPC title

• A61F2/64

  Knee joints · CPC title

• A61F2/76

  Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, {e.g. alignment means} · CPC title

• F03G5/06

  other than of endless-walk type · CPC title