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Worm wheel self-locking artificial limb elbow joint placed in forearm cavity

An elbow joint, self-locking technology, applied in the field of worm gear self-locking prosthetic elbow joint, can solve the problems of forearm, prosthetic hand and objects sagging, poor self-locking function, elbow joint shaking, etc., and achieve reliable mechanical self-locking ability , small size and light weight

Pending Publication Date: 2019-05-10
温岭市大翰弘知智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the small surface area of ​​the outer peripheral surface of the paddle, the frictional moment between it and the brake ring is also small, and the self-locking function is poor, and the forearm, prosthetic hand and objects often appear to sag
[0005] (2) Due to the relative radial movement of the paddle and the brake ring to achieve friction braking and exit the braking state, the jitter often occurs when the elbow joint rotates

Method used

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  • Worm wheel self-locking artificial limb elbow joint placed in forearm cavity
  • Worm wheel self-locking artificial limb elbow joint placed in forearm cavity

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] The prosthetic elbow joint of the present invention is installed in the forearm cavity, and its mechanical transmission is as follows: figure 1 As shown, the motor reducer assembly composed of the motor 42 and the reducer 43 is connected to the motor reducer assembly connecting plate 36 through screws, and the motor reducer assembly connecting plate 36 is connected to the elbow joint casing 2 through screws, and the axis of the motor 42 is along the small In the direction of the axis of the arm; the bevel gear gasket 35 is set on the output shaft of the reducer 43, the first bevel gear 34 with a D-shaped hole is installed on the D-shaped section journal of the reducer 43, and the bevel gear gasket 35 is used to bear The axial force when the first bevel gear 34 is driven; the bevel gear on the bevel gear shaft 33 meshes with the first bevel gear 34; the tight ring of ...

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Abstract

The invention discloses a mechanical structure of a worm wheel self-locking artificial limb elbow joint. The artificial limb elbow joint is arranged in a forearm cavity, the axis of a motor is along the axis of the forearm, a mechanical transmission chain of the artificial limb elbow joint comprises a motor speed reducer assembly, a bevel gear pair, a spur gear pair and a worm and worm gear pair,and an output connecting rod is used for connection with the big arm. The artificial limb elbow joint has the advantages of having simple structure, light weight, reliable mechanical self-locking andsmall mechanical abrasion and being provided with th low-speed-level worm and worm gear pair.

Description

technical field [0001] The invention belongs to the field of medical rehabilitation equipment, in particular to a worm gear self-locking prosthetic elbow joint placed in a forearm cavity. Background technique [0002] The prosthetic elbow joint is installed at the residual limb of the arm of the disabled, and is used to realize the function of the elbow joint of the human arm. In the patent documents, there are many descriptions of the invention of the prosthetic hand, but very few inventions about the prosthetic elbow joint. In almost all applications, the prosthetic elbow joint structure of OttoBock is used. This prosthetic elbow joint is driven by a DC motor and drives the forearm to move through three-stage deceleration. Among them, the first stage of deceleration adopts a friction planetary reducer, and replaces the planetary gear with three miniature deep groove bearings set on the three planetary wheel support shafts on the planetary system rod. The three miniature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/58
Inventor 王博成
Owner 温岭市大翰弘知智能科技有限公司