CN106344225A - Electric elbow joint shifting fork - Google Patents
Electric elbow joint shifting fork Download PDFInfo
- Publication number
- CN106344225A CN106344225A CN201510430556.9A CN201510430556A CN106344225A CN 106344225 A CN106344225 A CN 106344225A CN 201510430556 A CN201510430556 A CN 201510430556A CN 106344225 A CN106344225 A CN 106344225A
- Authority
- CN
- China
- Prior art keywords
- shifting fork
- elbow joint
- speed reduction
- fork
- reduction gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
Disclosed is an electric elbow joint shifting fork. The shifting fork is in a U shape. A boss is arranged on the end face of the shifting fork. A middle U-shaped groove is clamped to an annular groove of a speed reduction gear, a threaded hole is formed in the lower portion, the shifting fork and a threaded gear shaft are in threaded pair connection, the shifting fork and the threaded gear shaft form a threaded pair, and a center hole in the speed reduction gear and an output shaft adopt clearance fit; the shifting fork is characterized in that a motor rotates forwards and reversely, the shifting fork moves back and forth, the threaded gear shaft is driven to enable the speed reduction gear to be disengaged from or engaged with a clutch, and a front arm can perform free oscillation or bending action. According to the shifting fork, the shifting fork only has the unidirectional action in the elbow joint stretching and bending process; in the elbow joint stretching process, the speed reduction gear is pushed to move linearly, and therefore the speed reduction gear is made to be disengaged from the clutch; in the elbow joint bending process, the elbow joint is just made to move linearly inside the annular groove in the speed reduction gear along with the threaded gear shaft, the elbow joint does not make contact with the speed reduction gear, and therefore the defect that the shifting fork needs to have an effect during engagement and disengagement of the clutch is overcome.
Description
Technical field
The present invention relates to myoelectricity, Electronic control upper extremity prosthesis field, specifically refer to a kind of functional elbow unit fork.
Background technology
The functional elbow unit commonly using on the market at present is all to drive decelerator by motor, then drives the output shaft of elbow joint to realize stretching, bending action of elbow joint again.Although this functional elbow unit can be realized stretching, be bent function, patient is played with certain function of taking care of oneself.But because its use could can only work in motor rotation, and elbow joint becomes certain flexion angle all the time it is impossible to can arbitrarily swing so that patient seems very stiff in image as normal person in use, unnatural.In order to make patient also can arbitrarily can swing as normal person in arm plumbness, functional elbow unit with passive switch clutch is also occurred in that on market, functional elbow unit working condition is switched by controlled clutch, due to being passive switching, therefore very inconvenient on using, it is not easy to patient's operation.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide one kind can make patient can reach elbow joint stretches function in the wrong, again can be when not needing to stretch in the wrong, arm can freely swing as normal person, and is no longer necessary to the functional elbow unit fork passively switching.
The technical scheme is that and be accomplished by: a kind of functional elbow unit fork, described fork is u shape, its end face there is boss, middle u shape groove is stuck in the cannelure of ratio wheel, bottom has screwed hole, form screw thread pair with thread wheel shaft to connect, fork forms screw thread pair with thread wheel shaft, the centre bore of reduction gearing and output shaft adopt gap to coordinate, it is characterized in that: motor positive and inverse, fork moves forward and backward, and drives thread wheel shaft to make reduction gearing and clutch separation or be engaged, realizes forearm and freely swung or curved action in the wrong.
Fork upper screwed hole and thread wheel shaft form screw thread pair and connect, and u shape groove thereon is stuck in the cannelure in reduction gearing.
The present invention, fork is that one direction works during elbow joint is stretched, bent, make in elbow joint in the course of action stretched by promoting the linear motion of reduction gearing, so that reduction gearing and clutch are carried out and are separated, simply allow it for linear motion in the cannelure of reduction gearing with thread wheel shaft during elbow joint carries out bending, it is not allowed to contact reduction gearing, thus avoiding that clutch division and combination to be required for the shortcoming that fork works.
Brief description
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Specific embodiment
Shown in Fig. 1, Fig. 2, a kind of swingable functional elbow unit of the present invention, fork 1 upper screwed hole 2 and thread wheel shaft 3 formation screw thread pair connection, u shape groove 4 thereon is stuck in the cannelure in reduction gearing.When motor drives helical gear axle 3 motion, gear shaft holes 5 on fork 1 are with thread wheel shaft 3 along its axially-movable, when the boss 6 on fork 1 moves to the medial surface of reduction gearing cannelure, because fork 1 moves forward, drive reduction gearing along the axis direction movement of output shaft, because clutch is fixedly connected with output shaft, now reduction gearing and clutch will carry out separating, due to being gap cooperation between output shaft and reduction gearing, therefore output shaft can be freely rotatable in the in the hole of reduction gearing, elbow joint is in straight configuration under gravity, the forearm of artificial limb can freely swing under plumbness；When motor reversal, thread wheel shaft 3 drives fork 1 reversely for linear motion along thread wheel shaft 1, the elastic force now acting on the spring on reduction gearing outer face makes reduction gearing reversely for linear motion along output shaft, and move to clutch 1 direction,, while the axis around output shaft rotates, the axis of an edge output shaft is for linear motion, after both rectangular teeths are mutually twisted for reduction gearing, the rotation of thread wheel shaft passes to output shaft, realizes the action curved in the wrong of elbow joint.
Fork 1 forms screw thread pair with thread wheel shaft, reduction gearing centre bore and output shaft adopt gap to coordinate, when motor drives helical gear axle to rotate, fork moves axially along thread wheel shaft, reduction gearing and clutch separation will be driven when fork 1 moves to reduction gearing annular groove sidewall, because clutch is fixedly connected with output shaft, after reduction gearing and clutch separation, output shaft is due to being gap cooperation and reduction gearing between, now output shaft is free to rotate, thus forearm will be driven to be freely swung.When motor reversal, thread wheel shaft also will invert simultaneously, thus driving fork to move backward along thread wheel shaft, reduction gearing reversely will move axially along output shaft under the action of the spring and contact with clutch, after both tooth occlusions, the rotation of thread wheel shaft passes to output shaft, thus driving the action curved in the wrong of forearm.
It is that one direction works during elbow joint is stretched, bent that the present invention cleverly make use of fork, can reach elbow joint and stretch function in the wrong, again can be when not needing to stretch in the wrong, and arm can freely swing as normal person, and is no longer necessary to passively switch.
Claims (2)
1. a kind of functional elbow unit fork, described fork is u shape, has boss, middle u shape groove is stuck in the cannelure of ratio wheel on its end face, bottom has screwed hole, form screw thread pair with thread wheel shaft to connect, fork and thread wheel shaft form screw thread pair, the centre bore of reduction gearing and output shaft adopt gap to coordinate, it is characterized in that: motor positive and inverse, fork moves forward and backward, and drives thread wheel shaft to make reduction gearing and clutch separation or be engaged, realizes forearm and freely swung or curved action in the wrong.
2. a kind of functional elbow unit fork according to claim 1 it is characterised in that: described fork upper screwed hole and thread wheel shaft form screw thread pair and connect, and u shape groove thereon is stuck in the cannelure in reduction gearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430556.9A CN106344225A (en) | 2015-07-22 | 2015-07-22 | Electric elbow joint shifting fork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430556.9A CN106344225A (en) | 2015-07-22 | 2015-07-22 | Electric elbow joint shifting fork |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106344225A true CN106344225A (en) | 2017-01-25 |
Family
ID=57843209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510430556.9A Pending CN106344225A (en) | 2015-07-22 | 2015-07-22 | Electric elbow joint shifting fork |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106344225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111437083A (en) * | 2020-04-08 | 2020-07-24 | 苏州通和景润康复科技有限公司 | Myoelectric signal controlled single-degree-of-freedom artificial limb elbow joint state control method |
-
2015
- 2015-07-22 CN CN201510430556.9A patent/CN106344225A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111437083A (en) * | 2020-04-08 | 2020-07-24 | 苏州通和景润康复科技有限公司 | Myoelectric signal controlled single-degree-of-freedom artificial limb elbow joint state control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |
|
| WD01 | Invention patent application deemed withdrawn after publication |