CN212382718U

CN212382718U - Orthopedics traction device with adjustable contained angle and self-locking function

Info

Publication number: CN212382718U
Application number: CN202020791239.6U
Authority: CN
Inventors: 陈璐璐; 吴松梅; 孙永强; 李海婷; 杜贵鹃
Original assignee: Luoyang Orthopedic Traumatological Hospital Of Henan Province Henan Provincial Orthopedic Hospital
Current assignee: Luoyang Orthopedic Traumatological Hospital Of Henan Province Henan Provincial Orthopedic Hospital
Priority date: 2019-08-20
Filing date: 2020-05-13
Publication date: 2021-01-22
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to the field of medical equipment, concretely relates to orthopedics draw gear with contained angle is adjustable and self-locking function, include: the device comprises a column cylinder, a sleeve, a pulley overturning structure, a rotating shaft, an elastic torsion structure, a rope winding wheel, a traction pull rope and a traction bow. When in use, one end of the traction pull rope is tied on the rope winding wheel, the other end of the traction pull rope is connected with the traction bow, and the traction bow is fixedly tied at the ankle of a patient. And the hand wheel is rotated to drive the second worm to rotate, the second worm drives the second worm wheel to rotate, and the second worm wheel drives the rotating shaft to rotate through the second sleeve and the torsional spring, so that the rope winding wheel rotates to adjust the tightness of the traction pull rope. Through rotating the knob, the knob drives first worm and rotates for rotate the knob and can rotate pulley flip structure around first worm wheel and adjust, rotate and to adjust the height of pulley after the adjustment, can make the pull stay cord control traction bow adjust to suitable angle of pulling in patient ankle department, easy operation, convenient and practical.

Description

Orthopedics traction device with adjustable contained angle and self-locking function

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to an orthopedics draw gear with contained angle is adjustable and self-locking function.

Background

Traction is a commonly used treatment method in orthopedics, and is a treatment method for relieving muscle tension and strong contraction, reducing fracture and dislocation, preventing and correcting soft tissue contracture, and performing preoperative tissue release and postoperative brake on certain diseases by using the weight of suspension as traction force and the body weight as counter traction force through a traction device. Bone traction is an important traction technique, also called direct traction, and is characterized in that a steel needle or a traction forceps is used to penetrate through bone, so that traction force directly passes through bones to reach an injured part, and the functions of restoration, fixation and rest are achieved.

When medical personnel in hospitals carry out bone traction on patients with lower limb fracture, a fixed traction frame is sleeved on a sickbed frame at the tail part of a sickbed, a fixed pulley sleeve fixed through a top pin is arranged on the traction frame, a traction stay cord is wound around the fixed pulley, a weight is fixed at the tail end of the traction stay cord and naturally hangs down by means of gravity, and traction force is provided for the patients through the traction stay cord. However, the following defects are found in clinical use:

firstly, the fixed pulley is sleeved on the round tube type cross rod with a smooth surface through the ejector pin to realize the fixation on the overturning angle, the contact area of the ejector pin is too small when the ejector pin is propped on the surface of the round tube type cross rod, the fixed pulley is sleeved on the cross rod to be easily loosened when the overturning angle is positioned, if the fixed pulley is suddenly loosened, the traction part of a patient is easily pulled to form dislocation, and the fixed pulley has great hidden danger on the safety of the patient.

Secondly, the condition of left and right rocking appears very easily at the hanging down in-process in the weight that traction force was hung down through nature, can cause the in-process that the weight swayd that traction force is suddenly big unstable, influence traction effect, suspend in midair and be touched by the people of walking about back and forth very easily at the tailstock in addition, if the great probably can make the weight drop or pull the stay cord and drop from the fixed pulley of collision dynamics, cause patient traction failure and lead to the fact secondary damage even, the weight can be formed to other people's instep if drops simultaneously and injure by a crashing object.

The third, it all need loosen the knock pin earlier to decide pulley sleeve at every turn when fixed to other angles of upset on the horizontal pole, then grab and decide pulley sleeve and turn over it to suitable angle and screw fixed knock pin at last again, whole process is very loaded down with trivial details, need consume a large amount of time, need medical personnel to grab and decide pulley sleeve when loosening the knock pin moreover, but because the weight of balance stone roller weight is big, medical personnel's palm need bear the pulling force that the balance stone roller fared when the knock pin is fixed to take off suddenly, the phenomenon of taking off the hand appears very easily, also have very big potential safety hazard to the patient.

Fourthly, the traction force is adjusted by increasing or decreasing the number of the weight weights, so that the traction force can be adjusted in a stepped manner, and the traction force can not be adjusted in a stepless manner according to the self needs of the patient.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an orthopedic traction device with adjustable included angle and self-locking function, which can perform traction force stepless adjustment.

The utility model aims at realizing through the following technical scheme:

the utility model provides a pair of orthopedics draw gear with contained angle is adjustable and self-locking function, include: the device comprises a column cylinder, a sleeve, a pulley overturning structure, a rotating shaft, an elastic torsion structure, a rope winding wheel, a traction pull rope and a traction bow; the number of the upright post cylinders is two, and the two upright post cylinders are arranged on two upright posts of the sickbed in a height-adjustable manner; the sleeve is arranged on the two upright column barrels, and the rotating shaft is rotatably arranged on the two upright column barrels and is positioned at the lower part of the sleeve; the number of the pulley overturning structures is multiple, and the multiple pulley overturning structures are sleeved on the sleeve;

the pulley flip structure includes: the device comprises a first sleeve, a first shell, a deep groove ball bearing, a first worm wheel, a thrust bearing, a knob, a pulley yoke and a pulley; the first sleeve is sleeved on the sleeve, the first worm and the first worm wheel are meshed and then arranged in the first shell, the first shell is sleeved on the first sleeve through the deep groove ball bearing, the first worm wheel is fixedly sleeved on the first sleeve, a thrust bearing is sleeved on a worm shaft of the first worm between the end surface of the first worm and the first shell and arranged on the inner wall of the first shell, one end of the first worm extends out of the first shell and is connected with the knob, the lower part of the first shell is connected with a pulley frame, and a pulley is arranged on the pulley frame;

the elastic torsion structure includes: the second sleeve, the second shell, the second worm wheel, the thrust bearing, the hand wheel and the torsion spring; the second sleeve is sleeved on the rotating shaft, the second worm and the second worm wheel are meshed and then arranged in the second shell, the second shell is fixedly arranged on the column cylinder, the second worm wheel is fixedly sleeved on the second sleeve, a thrust bearing is sleeved on a worm shaft of the second worm between the end surface of the second worm and the second shell and is arranged on the inner wall of the second shell, one end of the second worm extends out of the second shell and is connected with the hand wheel, the second sleeve extends out of the second shell and is connected with one end of a torsion spring, the torsion spring is sleeved on the rotating shaft, and the other end of the torsion spring is connected with the rotating shaft;

the quantity of rope wheel is a plurality of, and a plurality of rope wheel cover are established in the pivot, and the one end of drawing the stay cord twines on the rope wheel, and the other end is walked around the pulley and is connected with the traction bow.

Furthermore, two ends of the rope winding wheel are provided with rope winding wheel retaining rings, a rope clamping groove is formed in each rope winding wheel retaining ring, and one end of the traction pull rope is wound on the rope winding wheel and then fixed in the rope clamping groove.

Furthermore, the rope winding wheel is sleeved with the rotating shaft sliding key, and a jacking pin used for jacking the sliding key is arranged on the rope winding wheel.

The device further comprises a shaft rod, wherein the shaft rod is telescopically arranged in the sleeve, the sleeve is sleeved with the shaft rod sliding key, and the sleeve is provided with a jacking pin for jacking the sliding key; the shaft lever is sleeved with a plurality of pulley overturning structures.

Further, a first sleeve in the pulley overturning structure is sleeved with the shaft lever sliding key, and a jacking pin used for jacking at the sliding key is arranged on the first sleeve.

Further, the device also comprises two first fixing frames, the first fixing frames are vertical sleeves connected with horizontal sleeves through rib plates, the vertical sleeves are sleeved on the upright post barrel in a height-adjustable mode, and sleeves are sleeved in the two horizontal sleeves.

Furthermore, the horizontal sleeve is sleeved with the sleeve sliding key, and a jacking pin used for jacking the sliding key is arranged on the horizontal sleeve.

Furthermore, the first sleeve is sleeved with the sleeve sliding key, and a jacking pin used for jacking the sliding key is arranged on the first sleeve; the barrel wall of one end of the first sleeve is provided with a sleeve retaining ring, the barrel wall of the other end of the first sleeve is provided with a retaining ring groove, and a retaining ring is arranged in the retaining ring groove.

Furthermore, a driving retaining ring is arranged on the rotating shaft, and the other end of the torsion spring is connected with the driving retaining ring.

Furthermore, the device also comprises two second fixing frames, and a rotating shaft is sleeved in the two second fixing frames.

The utility model discloses an orthopedics draw gear with contained angle is adjustable and self-locking function, at first the height of this device on the stand of adjustment during the use. And then the positions of the pulley overturning structure and the rope winding wheel are axially adjusted according to the actual condition of the traction position required at the ankle of the lower limb of the patient. And one end of the traction rope is tied with a knot and clamped on the rope winding wheel, then the traction rope is wound on the rope winding wheel for a plurality of circles, then the traction rope is upwards pulled to the rear side of the pulley and forwards extends around the pulley to be connected with a traction bow, and the traction bow is fixedly tied at the ankle of a patient. And the hand wheel is rotated to drive the second worm to rotate, the second worm drives the second worm wheel to rotate, and the second worm wheel drives the rotating shaft to rotate through the second sleeve and the torsional spring, so that the rope winding wheel rotates to adjust the tightness of the traction pull rope. Through rotating the knob, the knob drives first worm and rotates, again because first worm wheel can't rotate for rotate the knob and can rotate pulley flip structure around first worm wheel and adjust, can adjust the height of pulley after rotating the adjustment, can make to pull stay cord control traction bow and adjust to suitable angle of pulling, easy operation, convenient and practical in patient ankle department.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a view showing an angle of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 2 is a view showing another angle of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 3 is a view of an angle structure of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 4 is a structural diagram of another angle of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 5 is a structural diagram of a first fixing frame of the orthopedic traction device with adjustable included angle and self-locking function;

FIG. 6 is a structural diagram of an angle of a pulley turning structure in the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 7 is a structural diagram of another angle of the pulley turning structure in the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 8 is a cross-sectional view of the first shell of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 9 is a structural diagram of an elastic torsion structure of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 10 is a sectional view of the elastic torsion structure of the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

FIG. 11 is a structural diagram of a rope winding wheel in the orthopedic traction device with adjustable included angle and self-locking function of the present invention;

wherein the reference numerals are: 1. a column casing; 2. a sleeve; 3. a rotating shaft; 4. a rope winding wheel; 5. a pull cord; 6. drawing a bow; 7. a first sleeve; 8. a first housing; 9. a first worm; 10. a first worm gear; 11. a thrust bearing; 12. a knob; 13. a pulley yoke; 14. a pulley; 15. a second sleeve; 16. a second housing; 17. a second worm; 18. a second worm gear; 19. a hand wheel; 20. a torsion spring; 21. A rope winding wheel retaining ring; 22. rope clamping grooves; 23. a shaft lever; 24. a first fixing frame; 25. a retainer ring; 26. a driving retainer ring; 27. a second fixing frame; 28. a cross bar.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

As shown in fig. 1 to 11, the orthopedic traction device with adjustable included angle and self-locking function of the embodiment of the present invention comprises: the device comprises a column cylinder 1, a sleeve 2, a pulley overturning structure, a rotating shaft 3, an elastic torsion structure, a rope winding wheel 4, a traction pull rope 5 and a traction bow 6; the number of the upright column barrels 1 is two, and the two upright column barrels 1 are arranged on two upright columns of the sickbed in a height-adjustable manner; the sleeve 2 is arranged on the two upright column barrels 1, and the rotating shaft 3 is rotatably arranged on the two upright column barrels 1 and is positioned at the lower part of the sleeve 2; the number of the pulley overturning structures is multiple, and the multiple pulley overturning structures are sleeved on the sleeve 2;

the pulley flip structure includes: the device comprises a first sleeve 7, a first shell 8, a deep groove ball bearing, a first worm 9, a first worm wheel 10, a thrust bearing 11, a knob 12, a pulley frame 13 and a pulley 14; the first sleeve 7 is sleeved on the sleeve 2, the first worm 9 and the first worm wheel 10 are meshed and then arranged in the first shell 8, the first shell 8 is sleeved on the first sleeve 7 through a deep groove ball bearing, the first worm wheel 10 is fixedly sleeved on the first sleeve 7, a thrust bearing 11 is sleeved on a worm shaft of the first worm 9 between the end surface of the first worm 9 and the first shell 8, the thrust bearing 11 is arranged on the inner wall of the first shell 8, one end of the first worm 9 extends out of the first shell 8 and is connected with a knob 12, a pulley frame 13 is connected to the lower portion of the first shell 8, and a pulley 14 is arranged on the pulley frame 13;

the elastic torsion structure includes: the second sleeve 15, the second shell 16, the second worm 17, the second worm wheel 18, the thrust bearing 11, the hand wheel 19 and the torsion spring 20; the second sleeve 15 is sleeved on the rotating shaft 3, the second worm 17 and the second worm wheel 18 are meshed and then arranged in the second shell 16, the second shell 16 is fixedly arranged on the column tube 1, the second worm wheel 18 is fixedly sleeved on the second sleeve 15, a thrust bearing 11 is sleeved on a worm shaft of the second worm 17 between the end surface of the second worm 17 and the second shell 16, the thrust bearing 11 is arranged on the inner wall of the second shell 16, one end of the second worm 17 extends out of the second shell 16 and is connected with a hand wheel 19, one end of the second sleeve 15 extends out of the second shell 16 and is connected with one end of a torsion spring 20, the torsion spring 20 is sleeved on the rotating shaft 3, and the other end of the torsion spring is connected with the rotating shaft 3;

the number of the rope winding wheels 4 is multiple, the plurality of rope winding wheels 4 are sleeved on the rotating shaft 3, one end of the traction pull rope 5 is wound on the rope winding wheels 4, and the other end of the traction pull rope is connected with the traction bow 6 by bypassing the pulley 14.

The utility model discloses an orthopedics draw gear with contained angle is adjustable and self-locking function, at first the height of this device on the stand of adjustment during the use. Then the positions of the pulley overturning structure and the rope winding wheel 4 are adjusted along the axial direction according to the practical situation of the traction position needed at the ankle of the lower limb of the patient. One end of the traction rope 5 is tied with a knot and clamped on the rope winding wheel 4, then the traction rope 5 is wound on the rope winding wheel 4 for a plurality of circles, and then is pulled upwards to the rear side of the pulley 14 and extends forwards around the pulley 14 to be connected with the traction bow 6, and the traction bow 6 is fixedly tied at the ankle of the patient. And the hand wheel 19 is rotated, the hand wheel 19 drives the second worm 17 to rotate, the second worm 17 drives the second worm wheel 18 to rotate, and the second worm wheel 18 drives the rotating shaft 3 to rotate through the second sleeve 15 and the torsion spring 20, so that the rope winding wheel 4 rotates to perform tightness adjustment on the traction pull rope 5. Through rotating knob 12, knob 12 drives first worm 9 and rotates, again because first worm wheel 10 can't rotate for rotating knob 12 can rotate pulley flip structure around first worm wheel 10 and adjust, can adjust the height of pulley 14 after rotating the adjustment, can make and pull stay cord 5 control and pull bow 6 and adjust to suitable angle of pulling in patient ankle department, easy operation, convenient and practical.

As a preferable technical scheme, two ends of the rope winding wheel 4 are provided with rope winding wheel retaining rings 21, wherein a rope clamping groove 22 is formed on one rope winding wheel retaining ring 21, and one end of the traction rope 5 is wound on the rope winding wheel 4 and then fixed in the rope clamping groove 22.

The driving block ring 26 rear section of the shaft 3 is provided with a shaft guide groove along the axial direction, the shaft guide groove section of the shaft 3 sliding key sleeve has two sets of rope winding wheel 4, two sets of rope winding wheel 4 all correspond to the pulley flip structure of the top in the axial direction, the rope winding wheel 4 is provided with a convex rope winding wheel block ring 21 near the two sides, the rope winding wheel block ring 21 is used for limiting the traction rope 5 in the wheel groove of the rope winding wheel 4 and preventing the slipping. The rope clamping groove 22 with a notch is formed in the rope winding wheel retaining ring 21 on one side, the rope clamping groove 22 is in a curve arc shape, and a certain length is formed in the rope winding wheel retaining ring 21, so that the end of the traction pull rope 5 can be clamped in the rope clamping groove 22.

As the preferred technical scheme, the rope winding wheel 4 is sleeved with the sliding key of the rotating shaft 3, and the rope winding wheel 4 is provided with a jacking pin for jacking at the sliding key.

The outside of one of them side serving wheel fender ring 21 of serving wheel 4 has the serving wheel overhang along the axial design, but is provided with the sixth knock pin of screw-thread fit connection on the serving wheel overhang, is provided with the serving wheel guide block that slides at the pivot guide way on the serving wheel 4 inner wall, and the sixth knock pin is just to the pivot guide way position of pivot 3 in the orientation for the sixth knock pin can the screens in the pivot guide way to inside screw in, makes serving wheel 4 and pivot 3 can keep relatively fixed. The traction rope 5 is wound around the pulley 4, and the remaining part of the traction rope is wound around the pulley 14 of the pulley reversing structure above the traction rope 5, and the traction bow 6 is fixed at the rear end of the traction rope 5, and the traction bow 6 is of a prior art structure and will not be described in detail here.

As a preferable technical scheme, the device further comprises a shaft rod 23, wherein the shaft rod 23 is telescopically arranged in the sleeve 2, the sleeve 2 is sleeved with a sliding key of the shaft rod 23, and the sleeve 2 is provided with a jacking pin for jacking at the sliding key; the shaft rod 23 is sleeved with a plurality of pulley overturning structures.

The axial center of the sleeve 2 is provided with a through hole with a sleeve guide block along the axial direction, the shaft rod 23 is sleeved inside the through hole, the shaft rod 23 is axially provided with a shaft rod guide groove which can be matched with the sleeve guide block inside the through hole, and the sleeve 2 and the shaft rod 23 can not rotate relatively due to the matching of a sliding key and the sleeve. Simultaneously the screw thread closes soon on 2 pipe walls of sleeve pipe that are close to the port department has the fourth knock pin, and the fourth knock pin is whole to be the L type, and L type fourth knock pin is buckled to close soon and is got into and can play the locking effect with axostylus axostyle 23 and sleeve pipe 2 relatively stable fixed to axostylus axostyle guiding groove position of axostylus axostyle 23.

As preferred technical scheme, first sleeve 7 and axostylus axostyle 23 sliding key in the pulley upset structure cup joint, is provided with the knock pin that is used for the top tightly in sliding key department on first sleeve 7.

A pulley turning structure is also fixed on the shaft rod 23 which is telescopic inside the two sides of the sleeve 2 and is used for dragging other parts of the patient.

As the preferred technical scheme, the device also comprises two first fixing frames 24, wherein the first fixing frames 24 are vertical sleeves connected with horizontal sleeves through ribbed plates, the vertical sleeves are sleeved on the upright column barrel 1 in a height-adjustable mode, and the sleeves 2 are sleeved in the two horizontal sleeves.

The left and right upright post cylinders 1 are respectively sleeved with a first fixing frame 24, the first fixing frames 24 on the two upright post cylinders 1 are always at the same height, and the first fixing frames 24 are provided with fixing frame clamping holes and upright post cylinder 1 clamping holes which are uniformly distributed along the axial direction on the upright post cylinders 1 and are fixed and adjusted in height through clamping by a second ejector pin. The first fixing frame 24 is a horizontal sleeve with a vertical sleeve fixedly connected with a horizontal state through a ribbed plate. The same sleeve 2 in a horizontal state is sleeved inside the horizontal sleeves of the two first fixing frames 24.

As the preferred technical scheme, the horizontal sleeve is sleeved with the sliding key of the sleeve 2, and the horizontal sleeve is provided with a jacking pin used for jacking the sliding key.

The sleeve guide groove is axially formed in the wall of the sleeve 2, and the horizontal sleeve of the first fixing frame 24 is provided with a horizontal sleeve guide block at the position corresponding to the sleeve guide groove of the sleeve 2, so that the horizontal sleeve of the first fixing frame 24 and the sleeve 2 form a sliding key sleeving structure and cannot rotate relatively. The position of the sleeve guide groove corresponding to the sleeve 2 on the horizontal sleeve of the first fixing frame 24 is provided with a third ejector pin in threaded screwing, the third ejector pin is inserted into the horizontal sleeve in a screwing manner and is fixed to the sleeve guide groove of the sleeve 2 in a clamping manner, the pipe wall of the sleeve 2 is supported to the inner part of the sleeve guide groove by the third ejector pin instead of the sleeve 2 due to the fact that the pipe wall of the sleeve 2 is in a circular arc curved surface shape, the third ejector pin is not easy to clamp, and the sleeve 2 and the first fixing frame 24 can be relatively fixed more stably by supporting the third ejector pin to the inner part of the sleeve guide groove.

As a preferred technical scheme, the first sleeve 7 is sleeved with the sliding key of the sleeve 2, and the first sleeve 7 is provided with a knock pin for tightly propping against the sliding key; the wall of one end of the first sleeve 7 is provided with a sleeve retaining ring, the wall of the other end is provided with a retaining ring groove, and a retaining ring 25 is arranged in the retaining ring groove.

Two sets of pulley flip structures have been cup jointed on the sleeve pipe 2 of 24 interlude of two first mounts, and the first sleeve 7 on the pulley flip structure cup joints with sleeve pipe 2, and the same outstanding sleeve pipe guide slot that is provided with first sleeve 7 guide block and corresponds sleeve pipe 2 in 7 inner walls of first sleeve forms the sliding key cooperation and cup joints for first sleeve 7 can only carry out axial sliding for sleeve pipe 2. The first sleeve 7 is also provided with a sleeve knock-pin hole, so that the fifth knock-pin can be conveniently inserted into the sleeve guide groove of the sleeve 2 to clamp and fix the sleeve guide groove, and the whole device structure can ensure the fixed state of the pulley overturning structure when in use.

The outer layer of pulley flip structure is first casing 8, and first casing 8 is established in the periphery of first sleeve 7 through deep groove ball bearing cover and is made first casing 8 take place to rotate for first sleeve 7 in a flexible way, and the bellied sleeve retainer ring of end circumference of first sleeve 7 wherein one end presss from both sides tightly first casing 8 both sides simultaneously with retaining ring 25 of the inside cutting ferrule of first sleeve 7 other end retainer ring inslot for first casing 8 can not take place axial displacement for first sleeve 7.

As a preferred technical solution, the rotating shaft 3 is provided with a driving stop ring 26, and the other end of the torsion spring 20 is connected with the driving stop ring 26.

The second sleeve 15 has certain wall thickness and a second casing 16 is extended to a second sleeve 15 terminal surface, fixed an organic whole has the drive to keep off ring 26 on the pivot 3 of certain distance from the second sleeve 15 along the axial, it has torsional spring 20 to connect the cover on the pivot 3 between second sleeve 15 and drive fender ring 26, when second worm wheel 18 drives second sleeve 15 and rotates, second sleeve 15 can drive fender ring 26 and pivot 3 through torsional spring 20 and rotate, and torsional spring 20 is whole thicker, can only carry out slight circumference torsional deformation under the atress effect.

As the preferred technical scheme, the device also comprises two second fixing frames 27, and the rotating shaft 3 is sleeved in the two second fixing frames 27.

The second fixing frame 27 is fixed on the column tube 1 at a certain distance below the first fixing frame 24, the two second fixing frames 27 have the same height, and the rotating shaft 3 is sleeved on the two second fixing frames 27 in a clamping manner, so that the rotating shaft 3 cannot move axially relative to the second fixing frames 27 but can rotate relatively.

In particular, the device is mainly used for lower limb traction for patients with lower limb fracture. The upright column barrel 1 of the device is sleeved on an upright column (not shown in the figure) vertically fixed at the tail of a sickbed, and the upright column is vertically fixed at the left side and the right side of the tail of the sickbed respectively. The vertical column barrel 1 sleeved on the vertical column is fixedly connected with a plurality of horizontal cross rods 28 in an up-down distribution mode to form a complete traction frame, a plurality of yielding holes distributed on the vertical column barrel 1 corresponding to the vertical column are correspondingly provided with vertical column barrel 1 top pin holes on the barrel wall, and the vertical column barrel 1 top pin holes are led into the clamping position through first top pins to adjust and fix the relative height of the traction frame and the vertical column.

A first worm wheel 10 is coaxially and fixedly sleeved on the first sleeve 7 in the first housing 8, a first worm 9 is meshed with the first worm wheel 10, two ends of a worm shaft of the first worm 9 extend out of the first housing 8, a knob 12 is coaxially and fixedly arranged on the extending end, a thrust bearing 11 (a thrust ball bearing, a thrust roller bearing) is sleeved on the worm shaft between the end surfaces of two sides of the first worm 9 in the first housing 8 and the corresponding side inner wall of the first housing 8, and the thrust bearing 11 can prevent the first worm 9 from loosening in the first housing 8 along the axial direction. When the knob 12 is rotated to drive the first worm 9 to rotate synchronously, due to the meshing relationship between the worm gears and the worm, the first worm 9 can rotate relative to the first worm 9 when the first worm 9 rotates, and because the first worm gear 10 is coaxially fixed with the first sleeve 7, the first worm gear 10 cannot rotate, and when the knob 12 drives the first worm 9 to rotate, the first worm 9 drives the first housing 8 to rotate integrally around the axis of the first worm gear 10 through the worm shaft. Meanwhile, because the worm and gear structure has self-locking property, when the first housing 8 integrally rotates around the periphery of the first worm gear 10 to a certain angle, the knob 12 stops rotating, so that the first worm 9 drives the first housing 8 to keep a stable and static state when the first housing 8 is meshed at the angle. A fixed pulley structure is fixedly connected to the lower bottom surface of the first housing 8, and the fixed pulley structure includes a pulley frame 13 and a pulley 14 which is hinged. The two groups of pulley overturning structures on the section of the sleeve 2 between the two first fixing frames 24 are both the structures.

A second worm wheel 18 is coaxially sleeved on one side of the section of the rotating shaft 3 between the two second fixing frames 27 through a second sleeve 15. The second worm wheel 18 is coaxially and fixedly sleeved with the second sleeve 15, and the second sleeve 15 is movably sleeved with the rotating shaft 3, so that the rotating shaft 3 can rotate relative to the second sleeve 15. The second worm wheel 18 is engaged with the second worm 17, the second housing 16 is arranged outside the second worm wheel 18 and the second worm 17 to wrap the second housing 16, the second housing 16 and a cross bar 28 at a corresponding position of the second housing 16 are fixedly connected through a second fixing frame 27, the front end of the worm shaft of the second worm 17 extends out of the second housing 16, a hand wheel 19 is fixedly connected to the end of the worm shaft, and thrust bearings 11 (thrust ball bearings and thrust roller bearings) are also sleeved on the worm shaft between the front side and the rear side of the second worm 17 facing the front side and the rear side of the corresponding second housing 16, and the function of the thrust bearing 11 is the same as that of the thrust bearing 11 inside the first housing 8.

When the lower limbs of a patient need to be subjected to traction treatment, the height of the device on the stand column is adjusted firstly, the height of the first fixing frame 24 is adjusted according to the size of the body of the patient, and the device is fixed in a clamping mode through the second ejector pin after the adjustment is completed. And then the positions of the pulley overturning structure and the rope winding wheel 4 are axially adjusted according to the actual condition of the traction position at the ankle of the lower limb of the patient, and the pulley overturning structure and the rope winding wheel are respectively screwed and fixed through a fifth ejector pin and a sixth ejector pin after the adjustment is finished. The end head of one end of the traction pull rope 5 is tied up and clamped inside the rope clamping groove 22 of the rope winding wheel 4, so that one end of the traction pull rope 5 is fixed, then the traction pull rope 5 is wound on the rope winding wheel 4 for a plurality of circles, then the traction pull rope is pulled upwards to the rear side of the pulley 14 and extends forwards around the pulley 14 to be connected with the traction bow 6, and the traction bow 6 is fixedly tied at the ankle of a patient. And the hand wheel 19 is rotated, the hand wheel 19 drives the second worm 17 to rotate, the second worm 17 drives the second worm wheel 18 to rotate, and the second worm wheel 18 drives the driving retaining ring 26 and the rotating shaft 3 to rotate through the second sleeve 15 and the torsion spring 20, so that the rope winding wheel 4 rotates to perform tightness adjustment on the traction pull rope 5. Through rotating knob 12, knob 12 drives first worm 9 and rotates, again because first worm wheel 10 can't rotate for rotating knob 12 can rotate pulley flip structure around first worm wheel 10 and adjust, can adjust fixed pulley structure's height after rotating the adjustment, can be so that pull 5 control traction bow 6 and adjust to suitable angle of pulling in patient ankle department.

The utility model discloses an innovation technical point and beneficial effect lie in at least:

1. the pulley overturning structure adopts a worm and gear structure, and when the first worm gear 10 is not in motion, the first worm 9 rotates around the circumference of the first worm gear 10 to drive the integral first shell 8 and the fixed pulley structure to rotate. The worm gear has the auto-lock characteristic, can realize stopping promptly the effect of locking promptly for first casing 8 can keep the angle after the unidirectional rotation with the fixed pulley structure all the time and can not take place the angle and slide. Simultaneously first worm wheel 10 carries out the feather key through first sleeve 7 and sleeve pipe 2 and is connected and sleeve pipe 2 is connected with the feather key of first mount 24, can be so that pulley flip structure can remain stable state throughout, compare present current technical scheme and screw smooth sleeve pipe 2 through the knock pin with 14 cover structures of fixed pulley and carry out the angle fixed, present screens fixed mode makes very easily cause the slippage phenomenon under the pressure of pulling stay cord 5, make 14 cover upset angles of fixed pulley can't guarantee stability. The pulley flip structure of this technical scheme adopts the connected mode that guide way and worm gear constitute to guarantee pulley flip structure's upset to the stability of arbitrary angle all the time. Meanwhile, the worm and gear can be controlled to turn the pulley turning structure by rotating the knob 12, great convenience is achieved, and the situation that the fixed pulley 14 sleeve of the existing traction frame needs to be repeatedly loosened and screwed to turn the angle of the fixed pulley 14 sleeve by using a knock pin is avoided.

2. The elastic torsion structure of the technical scheme drives the rotating shaft 3 and the rope winding wheel 4 to synchronously rotate through the worm gear and worm rotation control torsion spring 20, the self-locking characteristic of the worm gear and worm can control the rotating shaft 3 and the rope winding wheel 4 to be locked immediately, and the torsion spring 20 enables the rope winding wheel 4 to have certain elastic buffering allowance when the locking is performed immediately after the stopping, so that the lower limbs of a patient can have slight movement allowance, and the lower limbs of the patient are not prone to causing the traction bow 6 to pull the slippage of the traction part of the patient when the patient moves unconsciously.

3. The stranding wheel fixes one end of the traction stay rope 5 through the rope clamping groove 22, the traction stay rope 5 is tensioned through the stranding wheel winding traction stay rope 5, and the traction tension of the traction stay rope 5 can be flexibly adjusted through the tensioning degree. Compare present medical personnel through hanging the vertical flagging of balance weight on pulling stay cord 5 to patient's traction bow 6 provide the pulling force, this technical scheme's traction force can be nimble according to actual conditions infinitely variable control, and the condition that the balance weight appears rocking when vertical flagging hangs can not take place through 4 windings of rope sheave simultaneously to this technical scheme, and whole pull taut process has very strong stability.

4. The structure that above-mentioned each sliding key cup jointed adopts the knock pin to fix the screens of screwing to the guide way department of inner housing structure simultaneously, can guarantee to fix the axial when the sliding key cup joints.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an orthopedics draw gear with contained angle is adjustable and self-locking function which characterized in that includes: the device comprises a column cylinder, a sleeve, a pulley overturning structure, a rotating shaft, an elastic torsion structure, a rope winding wheel, a traction pull rope and a traction bow; the number of the upright post cylinders is two, and the two upright post cylinders are arranged on two upright posts of the sickbed in a height-adjustable manner; the sleeve is arranged on the two upright column cylinders, and the rotating shaft is rotatably arranged on the two upright column cylinders and is positioned at the lower part of the sleeve; the number of the pulley overturning structures is multiple, and the pulley overturning structures are sleeved on the sleeve;

the pulley flip structure includes: the device comprises a first sleeve, a first shell, a deep groove ball bearing, a first worm wheel, a thrust bearing, a knob, a pulley yoke and a pulley; the first sleeve is sleeved on the sleeve, the first worm and the first worm wheel are meshed and then arranged in the first shell, the first shell is sleeved on the first sleeve through the deep groove ball bearing, the first worm wheel is fixedly sleeved on the first sleeve, the thrust bearing is sleeved on a worm shaft of the first worm between the end surface of the first worm and the first shell and arranged on the inner wall of the first shell, one end of the first worm extends out of the first shell and is connected with the knob, the lower part of the first shell is connected with the pulley frame, and the pulley is arranged on the pulley frame;

the elastic torsion structure includes: the second sleeve, the second shell, the second worm wheel, the thrust bearing, the hand wheel and the torsion spring; the second sleeve is sleeved on the rotating shaft, the second worm and the second worm wheel are meshed and then arranged in the second shell, the second shell is fixedly arranged on the column tube, the second worm wheel is fixedly sleeved on the second sleeve, the end face of the second worm and the worm shaft of the second worm between the second shell are sleeved with the thrust bearing, the thrust bearing is arranged on the inner wall of the second shell, one end of the second worm extends out of the second shell and is connected with the hand wheel, the second sleeve extends out of the second shell and is connected with one end of the torsion spring, the torsion spring is sleeved on the rotating shaft, and the other end of the torsion spring is connected with the rotating shaft;

the quantity of rope wheel is a plurality of, and is a plurality of the rope wheel cover is established in the pivot, the one end winding of drawing the stay cord is in on the rope wheel, the other end walk around the pulley with the traction bow is connected.

2. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 1, wherein two ends of the rope winding wheel are provided with rope winding wheel retaining rings, one of the rope winding wheel retaining rings is provided with a rope clamping groove, and one end of the traction rope is wound on the rope winding wheel and then fixed in the rope clamping groove.

3. The orthopedic traction device with the included angle adjustable function and the self-locking function according to claim 1, wherein the rope winding wheel is sleeved with the sliding key of the rotating shaft, and a jacking pin for jacking at the sliding key is arranged on the rope winding wheel.

4. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 1, further comprising a shaft rod, wherein the shaft rod is telescopically arranged in the sleeve, the sleeve is sleeved with the shaft rod sliding key, and the sleeve is provided with a top pin for tightly pushing against the sliding key; the shaft lever is sleeved with a plurality of pulley overturning structures.

5. The orthopedic traction device with the included angle adjustable and self-locking function according to claim 4, wherein the first sleeve in the pulley overturning structure is sleeved with the shaft rod sliding key, and the first sleeve is provided with a knock pin for abutting against the sliding key.

6. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 1, further comprising two first fixing frames, wherein the first fixing frames are vertical sleeves connected with horizontal sleeves through rib plates, the vertical sleeves are sleeved on the upright column barrel in a height-adjustable manner, and the sleeves are sleeved in the two horizontal sleeves.

7. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 6, wherein the horizontal sleeve is sleeved with the sleeve sliding key, and the horizontal sleeve is provided with a top pin for tightly pushing against the sliding key.

8. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 1, wherein the first sleeve is sleeved with the sleeve sliding key, and a knock pin for abutting against the sliding key is arranged on the first sleeve; the wall of one end of the first sleeve is provided with a sleeve retaining ring, the wall of the other end of the first sleeve is provided with a retaining ring groove, and a retaining ring is arranged in the retaining ring groove.

9. The orthopedic traction device with the included angle adjustable and self-locking function as claimed in claim 1, wherein a driving retaining ring is disposed on the rotating shaft, and the other end of the torsion spring is connected with the driving retaining ring.

10. An orthopedic traction device with adjustable included angle and self-locking function as claimed in claim 1, further comprising two second fixing frames, wherein said rotating shaft is sleeved in said two second fixing frames.