A knee joint hydraulic passive assist device

A power-assisted device and knee joint technology, applied in the direction of program-controlled manipulators, manufacturing tools, manipulators, etc., can solve problems such as insufficient power-assisted, inconvenient control, complex structure, etc., and achieve the effects of reducing fatigue and damage, easy control, and high power density

CN109176475BActive Publication Date: 2020-11-06BEIJING MECHANICAL EQUIP INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-11-06

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Abstract

The invention relates to a knee joint hydraulic passive power assisting device, and belongs to the technical field of wearable equipment. The problems that an existing knee joint power assisting device is complex in structure, inconvenient to control and insufficient in assistant power when a user stands are solved. The power assisting device adopts the hydraulic passive power assisting mode and comprises a thigh bracket and a shank bracket connected with the thigh bracket through a rotary shaft, and is provided with a hydraulic cylinder; a piston rod can be driven to move in a cylinder barrelof the hydraulic cylinder by the shank bracket; the hydraulic cylinder is connected with an oil box through an oil way, and the oil way is provided with a solenoid valve for opening or closing the oil way; and the oil box is internally provided with an oil box piston and an energy storage piece, the energy storage piece releases energy to push the oil box piston to provide oil for the oil way, and the hydraulic oil flows back to an oil storage chamber and reversely pushes the oil box piston so that the energy storage piece can store energy. The power assisting device is simple in structure, convenient to control, light in weight, good in power assisting effect and capable of effectively reducing the fatigue degree of a knee joint of the human body.
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Description

technical field

[0001] The invention relates to the technical field of wearable devices, in particular to a knee joint hydraulic passive booster. Background technique

[0002] The knee joint is a very important joint in human motion. During walking, the output torque of the knee joint can reach 250Nm, and the power can reach 120W. Therefore, knee joint assist devices have been widely studied in the fields of exoskeleton robots, rehabilitation medicine, and disability assistance.

[0003] Currently, knee power assist devices are divided into two types: active and passive. The driving form of active power assist devices is usually motor direct drive or hydraulic drive. Among them, the motor-driven booster device is mainly used in the fields of rehabilitation medicine and disability assistance. There is a form of using a motor with a reducer to directly act on the knee joint, and there is also a form of a roller screw connected between the thigh and calf driven by a motor. The...

Examples

Embodiment Construction

[0027] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0028] A specific embodiment of the present invention discloses a knee joint hydraulic passive assist device, such as figure 1 As shown, it includes a thigh support 1 and a calf support 2 connected by a rotating shaft, and a hydraulic cylinder 3 is also provided. One end of the hydraulic cylinder 3 is hinged with the thigh support 1 through a connecting piece 8, and the other end of the hydraulic cylinder 3 is connected by the piston rod of the hydraulic cylinder 3. 32 is hinged with the calf support 2, and the piston rod 32 can move in the cylinder barrel of the hydraulic cylinder under the d...