12 results about "Artificial knee" patented technology

The application discloses a single-shaft active and passive mixed driving intelligent artificial knee joint structure with energy recovery function, which comprises a joint rotating module, a gear transmission module, a hydraulic damping module, a rack and a motor. The gear transmission module comprises a primary bevel gear transmission system, a secondary gear transmission system, a synchronous belt wheel transmission assembly and a transmission rack. The motor is fixed on the transmission rack. In the active stage, the motor provides an active driving torque for the knee joint through the gear transmission module and the joint rotating module. In the passive stage, the joint rotating module transmits a passive torque of the knee joint to the motor through the gear transmission module, drives the motor to rotate, so that the motor generates electricity to recover energy, and the hydraulic damping module provides a damping torque to ensure the stability of the knee joint. In various use occasions, the required damping or driving torque can be obtained, the power consumption of the motor can be reduced by recovering the passive torque of the knee joint in the passive stage, and the working endurance of the intelligent artificial limb is improved.

The application relates to a compact active artificial knee joint with a torque adjusting device, which comprises a knee joint module, a receiving cavity connecting block, a lower leg connecting piece and a torque adjusting device, wherein the torque adjusting device comprises a spiral spring, a bent spring groove and the like, the knee joint module comprises a knee joint shell, a knee joint shaft center, a knee joint stator sleeve end cover and the like, one end of the spring is fixed at the upper receiving cavity connecting lug through an opening on the motor stator sleeve end cover, and the other end is fixed in the bent spring groove at the position of the motor stator sleeve end cover and the knee joint shaft center. The torque adjusting device can realize torque assistance and adjustment according to the angle size and direction of the limb rotation; meanwhile, the driving peak torque of the motor can be reduced, the size and the maximum torque of the driving motor are smaller due to the fact that the artificial limb needs to be easily worn, energy consumption and space are saved.

This invention provides an experimental device for friction and wear testing of an artificial knee joint, belonging to the field of material friction and wear technology. It includes a lifting module, with a femoral clamping module at its top. The femoral clamping module contains a polyurethane elastomer sealed chamber, and a tibial clamping module is connected below this chamber. An intelligent temperature-controlled circulating hydraulic pump is located on one side of the polyurethane elastomer sealed chamber. This invention achieves reciprocating motion through a reversing valve control. Combined with sub-millimeter precision adjustment of the hydraulic actuator and differentiated installation positions, it realizes high-precision flexion, extension, and torsional movements of the artificial knee joint. A stable base load is provided by a central hydraulic loading module, while the unnecessary torque from the dual electromagnetic loading modules cancels each other out. Simultaneously, instantaneous impact force is superimposed on the stable hydraulic load through instantaneous power switching, enriching the loading methods of the experimental device for friction and wear testing of an artificial knee joint.

To provide an artificial knee joint that may acquire properties close to a normal knee joint.SOLUTION: An artificial knee joint 1 includes: an insert member 2 embedded in a hole formed in part of a joint surface of a medial condyle MC or a lateral condyle LC of a tibia T; and a beam member 3 which is disposed downward the insert member 2, of which both ends have a length fixed to a cortical bone of the tibia T, and which supports the insert member 2 from a lower side.SELECTED DRAWING: Figure 1

Knee joint biomechanics and kinematics simulation machine, including frame, ankle joint simulation device, tibia fixing device, patellar tendon fixing device, hip joint simulation device, quadriceps femoris fixing device and femur fixing device; the ankle joint simulation device is arranged at the bottom of the frame, the ankle joint simulation device is connected with the tibia fixing device, the tibia fixing device is connected with the femur fixing device, the femur fixing device is connected with the hip joint simulation device, and the hip joint simulation device is arranged on the frame; the tibia fixing device and the femur fixing device are provided with the patellar tendon fixing device at the connecting position; the hip joint simulation device and the femur fixing device are provided with the quadriceps femoris fixing device at the connecting position. The invention provides a knee joint biomechanics and kinematics simulation machine to simulate the working condition of the lower limbs of human body under physiological activity conditions such as walking and squatting, and test and research the biomechanics and kinematics of natural knee joints and artificial knee joints.

A prosthetic limb includes: a socket as a thigh part; a thigh joint part provided on a side of the socket; a lower leg part coupled to the thigh joint part and provided to be rotatable around a knee shaft; a thigh part inclination angle acquisition unit that acquires an inclination angle Ψ formed by the socket relative to a vertical line passing through the knee shaft; and a rotational resistance control unit that weakens a rotational resistance of the knee shaft in accordance with a transition from a positive inclination angle formed when the socket is inclined rearward relative to the vertical line to a negative inclination angle formed when the socket is inclined forward relative to the vertical line.

The application provides an adaptive variable instantaneous center artificial knee joint, which comprises a pneumatic muscle driving assembly (10) and a knee joint assembly (20). The knee joint assembly (20) comprises a thigh (21), a shank (22), a first connecting rod mechanism (23), an adjusting rod (24), a second connecting rod mechanism (25) and a rotating rod (26). The two sides of the thigh (21) and the shank (22) are connected through the rotating rod (26), the first connecting rod mechanism (23) is arranged between the thighs (21), the second connecting rod mechanism (25) is arranged between the shanks (22), and the first connecting rod mechanism (23) and the second connecting rod mechanism (25) are connected through a central shaft (200). The artificial knee joint can solve the problem of poor coordination between the existing artificial knee joint and the human leg. Meanwhile, the artificial knee joint can meet the needs of most users and adapt to the instantaneous center rotation track of different human knee joints, and has a wide application range.

An assistive device is disclosed that includes a plurality of control systems for controlling active and passive tasks. The assistive device accommodates active power generation when needed, but is otherwise configured to switch to passive control for other tasks. The assistive device further includes a continuously variable transmission to optimize movement of the assistive device for a variety of tasks. The assistive device includes a lower limb embodiment defining an artificial knee joint controlled by the plurality of control systems.

A modular knee joint prosthesis is configured to move between an extended position and a flexion position. The modular knee joint prosthesis includes a femoral component that is configured to be mounted to a femur. The femoral component has a first cutout or opening in a central region thereof for receiving a femoral insert. The modular knee joint prosthesis also includes a tibial component that is configured to (i) be mounted either directly or indirectly to a tibia, and (ii) engage the femoral component. The tibial component has a second cutout or opening in a central region thereof for receiving a tibial insert. A kit includes the modular knee joint prosthesis, at least two of the femoral inserts having different geometries, and at least two of the tibial inserts having different geometries.

Proposed is a bearing component for an artificial knee joint, the bearing component including a body part, whose plane shape is oval, having an indentation portion formed by depressing a posterior center to a predetermined depth toward a center of the body part, a protruding portion protruding from an upper surface of the body part and introduced into an opening of a femoral component, a coupling portion provided on a lower surface of the body part, and having an engagement surface of a certain height to form a step difference with an outer circumferential surface of the body part, the engagement surface being formed on left and right sides of the coupling portion, and being not formed on an indentation surface, and a fastening portion having a plurality of coupling protrusions formed in a portion where the engagement surface of the coupling portion is not formed.

An artificial knee joint (1) has: an insertion member (2) which is embedded in a part of an articular surface of a medial condyle (MC) or a lateral condyle (LC) of a tibia (T); and a beam member (3) which is disposed below the insertion member (2) and has a length in which both ends are fixed to a cortical bone of the tibia (T).

The utility model belongs to the technical field of grinding positioning tools, and particularly relates to a medical artificial knee joint grinding positioning tool which comprises a connecting seat, an oil seat and a base, the oil seat and the base are installed at the front end of the connecting seat, the base is movably installed on the oil seat in the axial direction, and supporting bodies attached to a plurality of positions of the inner side of a workpiece are formed outside the base. A driving sleeve, a pressing sleeve and a nut which are used for axially clamping or loosening the connecting rod through threads are arranged in the base, the pressing sleeve is in threaded connection with the nut, and the driving sleeve is in extrusion fit with the pressing sleeve; the multi-position supporting bodies are arranged to support a workpiece, and then the connecting rod is clamped through the driving sleeve, the pressing sleeve and the nut, so that multi-point supporting is achieved while quick clamping is facilitated, and the stability of the workpiece during grinding is guaranteed.