CN220404606U - Split type pivot and intervention equipment - Google Patents

Abstract

The utility model discloses a split type rotating shaft and interventional equipment, wherein the split type rotating shaft comprises a ratchet shaft and a rotating wheel, a middle rod is arranged on the ratchet shaft, and a plurality of ratchets are annularly arranged on the ratchet shaft around the middle rod; the rotating wheel is sleeved on the middle rod and used for coiling the traction rope body, and the rotating wheel rotates by taking the middle rod as an axis; and a plurality of pawls are annularly arranged on the edge of the rotating wheel, and the pawls are meshed with the ratchet teeth. When the split type rotating shaft is used, the traction rope body can be fixed on the rotating wheel, then the rotating wheel is rotated to realize tightening, and the traction rope body cannot be loosened after tightening due to the resistance generated by meshing and matching of the pawl and the ratchet, so that the traction rope body can be kept in a tightening state, and then the traction rope body can synchronously rotate with the ratchet shaft, so that the split type rotating shaft is convenient to use.

Description

Split type pivot and intervention equipment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a split type rotating shaft and interventional equipment.

Background

The interventional operation is a minimally invasive surgical medical treatment means by utilizing modern high-tech means, and particularly, a special catheter, a guide wire and other precise instruments are introduced into a human body under the guidance of medical imaging equipment to observe or operate a focus or a lesion in the human body. The interventional operation has the characteristics of no operation, small wound, quick recovery and good effect. The interventional operation is completed by an interventional operation instrument or an interventional operation robot, for example, the pulmonary operation robot can be used for placing a catheter along the airway of a human body to reach the focus position of the lung of the human body during the pulmonary operation.

Because the wire drive has the advantages of small occupied space and high transmission precision, the traditional interventional surgical instrument is often assembled through the rotating shaft and the traction rope body, and the movement and the steering of the mechanical arm and the interventional catheter are controlled in a wire drive mode. For example, in the prior art, a transmission structure of an interventional medical device (patent publication number: CN 218787242U), a design scheme is described in which the elastic state of a traction wire is controlled by a power device, so as to cooperate with other parts.

However, in the conventional wire transmission structure, the winding rope is generally wound around the rotating shaft, and the rotatable rotating shaft is liable to turn, which affects the tightness of the winding rope. That is, the operator is difficult to keep the state of tightening after fixing the haulage rope body to the pivot, has the defect that control accuracy is not enough in the use, can take place the condition that the haulage rope body loosen even, inconvenient during the use.

Therefore, the prior art has the defect of inconvenient use and needs to be improved and developed.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide a split type rotating shaft and an interventional device, and aims to solve the problem that the rotating shaft for wire transmission in the existing interventional device cannot keep the state of tightening the traction rope body, resulting in inconvenient use.

The technical scheme of the utility model is as follows:

the split type rotating shaft comprises a ratchet shaft and a rotating wheel, wherein a middle rod is arranged on the ratchet shaft, and a plurality of ratchets are annularly arranged on the ratchet shaft around the middle rod; the rotating wheel is sleeved on the middle rod and used for coiling the traction rope body, and the rotating wheel rotates by taking the middle rod as an axis; and a plurality of pawls are annularly arranged on the edge of the rotating wheel, and the pawls are meshed with the ratchet teeth.

The split rotating shaft is characterized in that a first inclined plane and a first vertical plane are arranged on the ratchet, an acute angle is formed between the first inclined plane and the rotating plane of the rotating wheel, and a right angle is formed between the first vertical plane and the rotating plane of the rotating wheel; the pawl is provided with a second inclined plane and a second vertical plane, an acute angle is formed between the second inclined plane and the rotating plane of the rotating wheel, and the second inclined plane is attached to the first inclined plane and used for guiding the rotating wheel to rotate positively; and a right angle is formed between the second vertical surface and the rotating plane of the rotating wheel, and the second vertical surface is attached to the first vertical surface and is used for preventing the rotating wheel from reversely rotating.

The split rotating shaft is provided with a plurality of ratchets, and the ratchets are uniformly distributed around the middle rod; the plurality of pawls are uniformly distributed around the middle rod; the number of pawls is less than the number of ratchet teeth.

The split type rotating shaft is characterized in that the pawl is provided with five, and the ratchet is provided with twenty-four ratchet teeth

The split rotating shaft is characterized in that an assembly through hole is formed in the center of the rotating wheel and used for being inserted into the middle rod; the length value of the middle rod is larger than the depth value of the assembly through hole.

The split rotating shaft is characterized in that a connecting part is arranged on one side, away from the middle rod, of the ratchet shaft and is used for butt-jointing a driving instrument; the connecting part and the middle rod are coaxially arranged and are both positioned at the center of the ratchet shaft.

The split rotating shaft comprises a pawl, a rotating shaft and a rotating shaft, wherein the pawl comprises a connecting section, an elastic section and a contact section, and the connecting section is convexly arranged on the side wall of the rotating wheel; the elastic section is convexly arranged on the side wall of the connecting section and extends along the circumferential direction of the rotating wheel; the contact section is arranged at one end of the elastic section, which is away from the connecting section, and is positioned on the surface of one side of the elastic section, which is towards the ratchet; the contact section is engaged with the ratchet.

The split type rotating shaft is characterized in that an annular wire slot is formed in the rotating wheel and used for accommodating a traction rope body, and the cross section of the annular wire slot is in a horn shape.

The split type rotating shaft is characterized in that the ratchet shaft is a polycarbonate ratchet shaft, a polyvinyl chloride ratchet shaft, a polytetrafluoroethylene ratchet shaft or an acrylonitrile-butadiene-styrene copolymer ratchet shaft; and/or the rotating wheel is a polycarbonate rotating wheel, a polyvinyl chloride rotating wheel, a polytetrafluoroethylene rotating wheel or an acrylonitrile-butadiene-styrene copolymer rotating wheel.

The application also discloses an interventional device, which comprises a driving mechanism and an interventional catheter, wherein the interventional catheter is in transmission connection with the driving mechanism; the driving mechanism comprises the split rotating shaft, wherein a plurality of steel wires are fixed in an inner tube at the front end of the interventional catheter, and the steel wires are coiled on the rotating wheel of the split rotating shaft.

Compared with the prior art, the embodiment of the utility model has the following advantages:

the split type rotating shaft disclosed by the utility model is used in interventional equipment, the traction rope body of the interventional catheter is wound on the split type rotating shaft, and the retraction and release actions of the traction rope body are controlled through the rotation of the split type rotating shaft, so that the rotation of the interventional catheter is realized.

Specifically, when in use, the rotating wheel is sleeved on the ratchet shaft, the traction rope body is coiled on the rotating wheel, and the traction rope body is tensioned by rotating the rotating wheel; after tensioning, the friction resistance generated by the meshing fit of the pawl and the ratchet can prevent the rotating wheel from rotating, so that the traction rope body can be kept in a tight state, the loosening caused by the rotating wheel rotating can not occur, the wire drive transmission effect with high sensitivity and high accuracy can be kept in the use process, the device is convenient to use in medical intervention equipment, and the device is better suitable for the use requirement of high standards in medical occasions.

In a word, in the split type rotating shaft assembly process disclosed by the utility model, the tension of the traction rope body can be freely adjusted by rotating the rotating wheel, the rotating wheel can not automatically rotate after the adjustment, and the tension of the traction rope body can be resisted by utilizing the resistance generated by the abutting contact between the ratchet shaft and the rotating wheel, so that the tightening state of the traction rope body is maintained, the high-precision control and transmission are facilitated, and the split type rotating shaft assembly device is convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic view of a split shaft according to the present utility model;

FIG. 2 is a cross-sectional view taken along the AA' direction of FIG. 1;

FIG. 3 is an exploded view of the split shaft of the present utility model;

fig. 4 is an exploded view of another angle of the split shaft of the present utility model.

Wherein, 10, a ratchet shaft; 11. a middle rod; 12. a ratchet; 121. a first inclined surface; 122. a first vertical plane; 13. a connection part; 20. a rotating wheel; 21. a pawl; 211. a second inclined surface; 212. a second vertical plane; 213. a connection section; 214. an elastic section; 215. a contact section; 22. assembling the through hole; 23. an annular wire slot.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the following description will make clear and complete descriptions of the technical solutions of the embodiments of the present utility model with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, in an embodiment of the present application, a split-type rotating shaft is disclosed, which comprises a ratchet shaft 10 and a rotating wheel 20, wherein a middle rod 11 is arranged on the ratchet shaft 10, and a plurality of ratchets 12 are annularly arranged on the ratchet shaft 10 around the middle rod 11; the rotating wheel 20 is sleeved on the middle rod 11 and is used for coiling a traction rope body, and the rotating wheel 20 rotates by taking the middle rod 11 as an axis; and a plurality of pawls 21 are annularly arranged on the edge of the rotating wheel 20, and the pawls 21 are engaged with the ratchet teeth 12.

The split type pivot that this embodiment discloses is arranged in intervention equipment, and the haulage rope body of intervention pipe twines in split type pivot, and the action of receiving and releasing of haulage rope body is controlled through the rotation of split type pivot, and then realizes the rotation of intervention pipe.

Specifically, when in use, the rotating wheel 20 is sleeved on the ratchet shaft 10, the tail end of the traction rope body is knotted and fixed on the rotating wheel 20 through soldering tin, and the traction rope body is tensioned by rotating the rotating wheel 20; after tensioning, the friction resistance generated by the meshing and matching of the pawl 21 and the ratchet 12 can prevent the rotating wheel 20 from rotating, so that the traction rope body can be kept in a tight state, the loosening caused by the rotating wheel 20 rotating can not occur, the wire drive transmission effect with high sensitivity and high accuracy can be kept in the use process, the wire drive transmission device is convenient to use in medical intervention equipment, and the wire drive transmission device is better suitable for high-standard use requirements in medical occasions.

In a word, in the split type pivot assembly process that this embodiment disclosed, can freely adjust the rate of tension of haulage rope body through rotating the runner, after adjusting moreover, runner 20 can not automatic gyration, and the resistance that utilizes butt contact to produce between ratchet shaft and the runner can be to the pulling force of anti haulage rope body to keep the tight state of haulage rope body, be favorable to carrying out high accuracy control and transmission, facilitate the use.

Specifically, the hauling rope disclosed in the present embodiment includes, but is not limited to, high-toughness ropes such as wire ropes and nylon ropes. The rope can be kept in a long-time tightening state without deformation by arranging the steel wire rope or the nylon rope, so that the traction rope body is prevented from being lengthened under a long-time stress state, the loosening of the traction rope body is further prevented, and the functional reliability of the traction rope body control intervention catheter in the use process is ensured.

Specifically, the split type rotating shaft disclosed in the embodiment is assembled to the interventional device when in use, the connecting position is arranged on the ratchet shaft 10, the ratchet shaft 10 is driven to rotate by being in transmission connection with the connecting position through the control part of the interventional device, and the rotating wheel 20 is driven to rotate synchronously, so that the traction rope body can be tightened, and the effect of changing the local tightness of the front end of the interventional catheter is achieved.

In the actual use process, the plurality of split type rotating shafts are assembled to control the plurality of traction ropes, the plurality of traction ropes are all connected to the interventional catheter, the plurality of traction ropes are utilized to work cooperatively, the tightness of different positions of the front end of the interventional catheter is different, and therefore bending at different angles is generated, and flexible rotation of the interventional catheter is realized.

As shown in fig. 3 and 4, as another implementation manner of the present embodiment, it is disclosed that the ratchet 12 is provided with a first inclined surface 121 and a first vertical surface 122, wherein an acute angle is formed between the first inclined surface 121 and a rotation plane of the rotating wheel 20, and a right angle is formed between the first vertical surface 122 and the rotation plane of the rotating wheel 20; the pawl 21 is provided with a second inclined plane 211 and a second vertical plane 212, an acute angle is formed between the second inclined plane 211 and the rotation plane of the rotating wheel 20, and the second inclined plane 211 is attached to the first inclined plane 121 and is used for guiding the rotating wheel 20 to rotate forward; the second vertical surface 212 forms a right angle with the rotation plane of the rotating wheel 20, and the second vertical surface 212 is attached to the first vertical surface 122 to prevent the rotating wheel 20 from rotating reversely.

In this embodiment, the ratchet 12 and the pawl 21 are provided as a pair of right triangle prisms which are oppositely arranged, so that when the rotating wheel 20 rotates in the forward direction, the first inclined surface 121 contacts with the second inclined surface 211, and at this time, the first inclined surface 121 slightly lifts the rotating wheel 20, so that the pawl 21 can pass over the ratchet 12, thereby keeping the rotating wheel 20 to rotate flexibly to tighten the traction rope body; when the pulley 20 is affected by the pulling force of the pulling rope to generate a trend of reverse rotation, the first vertical surface 122 is contacted with the second vertical surface 212, and the first vertical surface and the second vertical surface are abutted, so that a hard collision is formed, the pawl 21 cannot pass over the ratchet 12 to block the reverse rotation of the pulley 20, and therefore the situation of loosening of the pulling rope can not occur.

Therefore, in this embodiment, the ratchet 12 and the pawl 21 are both right triangles, so that the rotating wheel 20 can only move unidirectionally, thereby completely avoiding the possibility of reverse rotation of the rotating wheel 20, further improving the stability of tightening the traction rope body of the rotating wheel 20, and facilitating the use.

As another implementation of the present embodiment, as shown in fig. 3 and 4, it is disclosed that the ratchet teeth 12 are provided in plurality, and the plurality of ratchet teeth 12 are uniformly distributed around the middle rod 11; the number of the pawls 21 is plural, and the pawls 21 are uniformly distributed around the center rod 11; the number of pawls 21 is smaller than the number of ratchet teeth 12.

In this embodiment, through setting up a plurality of pawls 21 and a plurality of ratchet 12 assembly for runner 20 just can be fixed in every rotation certain angle, the regulation precision when the split type pivot regulation haulage rope body is controlled through setting up the quantity of ratchet 12 and pawl 21 in this embodiment, is applied to different service scenarios, can adjust the regulation precision of split type pivot according to the quantity ratio of ratchet 12 and pawl 21 of difference, thereby further improve the control precision of split type pivot, the steering angle of intervention pipe on the accurate control intervention equipment of being convenient for.

Specifically, as another implementation of the present embodiment, it is disclosed that the pawl 21 is provided with five and the ratchet 12 is provided with twenty-four. The spacing angle between every two pawls 21 in this embodiment is 72 °; the spacing angle between every two ratchets 12 is 15 degrees, and the number of ratchets 12 and pawls 21 is not a multiple, so that five pawls 21 do not simultaneously contact with the ratchets 12 during the alignment engagement. When one pawl 21 is engaged with the ratchet 12, the other four pawls 21 are spaced 3 °, 6 °, 9 ° and 12 ° from the ratchet 12 in the next contact, respectively; thus, during rotation of the wheel 20, there will be and only one pawl 21 engaging the ratchet 12 every 3 ° of rotation, so that the wheel 20 remains stationary and does not rotate. In practice, the diameter of the ratchet shaft 10 on the interventional device is about 20 mm, so that the minimum adjustable angle of the split shaft is 3 °, and the accuracy of the adjustment in length is about 0.4 mm.

Specifically, the number of pawls 21 and ratchet teeth 12 may be set in a multiple relationship in another implementation of the present embodiment. For example, twenty four ratchet teeth 12 are provided, six pawls 21 can be provided, and six pawls 21 can simultaneously engage with the ratchet teeth 12 every 15 ° of rotation during rotation of the rotating wheel 20, so that the contact area between the rotating wheel 20 and the ratchet shaft 10 in the stopped state is increased, and compared with the aligned state in which only one pawl 21 engages with the ratchet teeth 12, the mutual supporting effect between the rotating wheel 20 and the ratchet shaft 10 can be increased by simultaneously engaging a plurality of pawls 21 with a plurality of ratchet teeth 12, thereby further improving stability and avoiding rotation of the rotating wheel 20.

As another implementation of the present embodiment, as shown in fig. 2 and 3, it is disclosed that the center of the rotating wheel 20 is provided with an assembly through hole 22, and the assembly through hole 22 is used for inserting the middle rod 11; the length of the middle rod 11 is greater than the depth of the fitting through hole 22. In the rotating process of the rotating wheel 20 disclosed in the embodiment, the ratchet 12 and the pawl 21 are aligned, so that the rotating wheel 20 has a small-amplitude floating motion perpendicular to a rotating plane, in order to improve the stability of the rotating wheel 20 sleeved on the middle rod 11, the middle rod 11 is arranged to pass through the assembly through hole 22, the rotating wheel 20 can be sleeved with the middle rod 11 when floating, the detachment or the deviation is avoided, the blocking is avoided, and the rotating flexibility of the rotating wheel 20 is maintained.

Specifically, during actual use, the split type pivot can set up in the shell of intervention equipment, and the length value of well pole 11 is bigger, so well pole 11 pass assembly through-hole 22, can with the shell butt of intervention equipment to block runner 20 completely, avoid runner 20 to deviate from on the well pole 11.

As another implementation of this example, as shown in fig. 4, it is disclosed that a connection portion 13 is provided on the side of the ratchet shaft 10 facing away from the intermediate lever 11, for docking a driving instrument; the connecting part 13 and the middle rod 11 are coaxially arranged and are positioned at the center of the ratchet shaft 10. The split type rotating shaft disclosed in this embodiment is abutted with the driving apparatus of the intervention apparatus through the connecting portion 13 and transmitted, for example, the intervention apparatus adopts a motor as the driving apparatus, the connecting portion 13 can be abutted with the output shaft of the motor, and thus the motor can drive the ratchet shaft 10 to rotate.

In this embodiment, the connecting portion 13 and the middle rod 11 are coaxially arranged and are both located at the center line position of the ratchet shaft 10, so that the center of gravity position is more stable when the ratchet shaft 10 rotates, the connection stability of the ratchet shaft 10 and the driving apparatus of the interventional device is kept, meanwhile, the transmission between the ratchet shaft 10 and the rotating wheel 20 is kept more stable, and the deflection problem is avoided.

Specifically, the rotation direction of the ratchet shaft 10 disclosed in this embodiment is the same as the rotation direction when the pulley 20 tightens the pulling rope, so that the pulley 20 and the ratchet shaft 10 are kept stably connected and synchronously rotated as much as possible. For example, the pawl 21 and the ratchet teeth 12 are each provided with a right triangle in cross-sectional shape, and the second inclined surface is located in front of the second vertical surface 212. When the wheel 20 rotates counterclockwise, the second inclined surface contacts the first inclined surface until the pawl 21 rides over the currently contacted ratchet tooth 12, and the second vertical surface 212 does not contact the first vertical surface 122. At this time, when the ratchet shaft 10 is rotated in the counterclockwise direction, the first vertical surface 122 on the ratchet shaft 10 moves counterclockwise, and thus the second vertical surface 212 is pushed counterclockwise, that is, the rotating wheel 20 is pushed to rotate in the clockwise direction in synchronization. Conversely, when the second inclined surface of the pawl 21 is disposed behind the second vertical surface 212, the rotating wheel 20 rotates clockwise to tighten the traction rope body, and at the same time, the ratchet shaft 10 rotates clockwise to drive the rotating wheel 20 to rotate synchronously.

It can be seen that, in this embodiment, when the direction of the first inclined surface on the ratchet 12 and the direction of the second inclined surface on the pawl 21 are set, the ratchet shaft 10 needs to be cooperatively matched with the rotation direction, so as to achieve the effect of conveniently adjusting and maintaining the tension of the traction rope body.

As another implementation of this embodiment, as shown in fig. 4, the pawl 21 is disclosed to include a connecting section 213, an elastic section 214 and a contact section 215, wherein the connecting section 213 is convexly disposed on a side wall of the rotating wheel 20; the elastic section 214 is convexly arranged on the side wall of the connecting section 213 and extends along the circumferential direction of the rotating wheel 20; the contact section 215 is disposed at an end of the elastic section 214 facing away from the connecting section 213, on a side surface of the elastic section 214 facing toward the ratchet 12, and the contact section 215 is engaged with the ratchet 12.

The pawl 21 disclosed in this embodiment may be integrally formed with the main body of the rotating wheel 20, and the connecting section 213 is provided on the side wall of the rotating wheel 20 in a protruding manner as a support, and then the elastic section 214 is extended horizontally, the elastic section 214 is suspended, and the contact section 215 is provided at the front end of the elastic section 214, that is, at the end far from the connecting section 213, and the contact section 215 is in contact with the ratchet 12. When the rotating wheel 20 rotates forward, the contact section 215 is abutted against the ratchet 12, the elastic section 214 is deformed under force, and the contact section 215 can pass over the ratchet 12. It can be seen that by providing the elastic pawl 21, the up-and-down floating amplitude can be reduced when the rotating wheel 20 is rotated, and the rotating stability of the rotating wheel 20 can be improved.

As shown in fig. 2, 3 and 4, as another implementation manner of this embodiment, it is disclosed that an annular wire groove 23 is provided on the rotating wheel 20 for accommodating the traction rope body, and the cross section shape of the annular wire groove 23 is a horn shape. The annular wire slot 23 disclosed in the embodiment is formed in the side wall of the rotating wheel 20, the traction rope body is stored in an annular mode, space is saved, multiple layers of traction rope bodies are stacked in the annular wire slot 23 during storage, friction force between the traction rope bodies can assist the rotating wheel 20 in tightening the traction rope bodies, a tensioning state is maintained, and the loosening probability of the traction rope bodies is greatly reduced.

Specifically, the cross section of the annular wire groove 23 in this embodiment is horn-shaped, that is, the opening of the annular wire groove 23 is wider, deeper and narrower, so that the traction rope body can conveniently enter the annular wire groove 23; and when coiling the haulage rope body, the quantity of the haulage rope body of inlayer is few, and the quantity of the haulage rope body of outer is many, for example innermost winding round haulage rope body, penultimate layer winding two rounds haulage rope body, and so on, stacks the haulage rope body through the V font and can make every layer of haulage rope body all keep stable, and contact area is big each other moreover, and frictional force is big, is favorable to keeping tensioning state.

Specifically, as another implementation of the present example, the ratchet shaft 10 is disclosed as a polycarbonate ratchet shaft 10, a polyvinyl chloride ratchet shaft 10, a polytetrafluoroethylene ratchet shaft 10 or an acrylonitrile-butadiene-styrene copolymer ratchet shaft 10; and/or the runner 20 is a polycarbonate runner 20, a polyvinyl chloride runner 20, a polytetrafluoroethylene runner 20, or an acrylonitrile-butadiene-styrene copolymer runner 20. The ratchet shaft 10 and the rotating wheel 20 of the same type can be adopted in the embodiment, so that the abrasion of the ratchet 12 and the pawl 21 is reduced when the rotating wheel rotates, and the effective service life of the split rotating shaft is prolonged.

It should be noted that, in the present embodiment, the types of the ratchet shaft 10 and the rotating wheel 20 are merely exemplified, but the scope of the present utility model is not limited thereto, and other types of ratchet shafts 10 and rotating wheels 20 should be considered as equivalent alternatives to the concept of the present utility model as long as the technical effects disclosed in the present application can be achieved.

As another embodiment of the present application, an interventional device is disclosed, comprising a drive mechanism and an interventional catheter, the interventional catheter being in driving connection with the drive mechanism; the driving mechanism comprises the split rotating shaft, wherein a plurality of steel wires are fixed in an inner tube at the front end of the interventional catheter, and the steel wires are coiled on the rotating wheel 20 of the split rotating shaft. The driving mechanism disclosed in the embodiment is connected with the ratchet shaft 10 and is used for driving the ratchet shaft 10 and the rotating wheel 20 to synchronously rotate, and the rotating wheel 20 is connected with the steel wire of the intervention catheter, so that the steering action of the intervention catheter is accurately controlled through the driving mechanism, and the operability of the intervention device is improved.

In summary, the present application discloses a split type rotating shaft, which includes a ratchet shaft 10 and a rotating wheel 20, wherein a middle rod 11 is disposed on the ratchet shaft 10, and a plurality of ratchet teeth 12 are annularly arranged on the ratchet shaft 10 around the middle rod 11; the rotating wheel 20 is sleeved on the middle rod 11 and is used for coiling a traction rope body, and the rotating wheel 20 rotates by taking the middle rod 11 as an axis; and a plurality of pawls 21 are annularly arranged on the edge of the rotating wheel 20, and the pawls 21 are engaged with the ratchet teeth 12.

The split type pivot that this embodiment discloses is arranged in intervention equipment, and the haulage rope body of intervention pipe twines in split type pivot, and the action of receiving and releasing of haulage rope body is controlled through the rotation of split type pivot, and then realizes the rotation of intervention pipe. When in use, the rotating wheel 20 is sleeved on the ratchet shaft 10, the traction rope body is coiled on the rotating wheel 20, and the traction rope body is tensioned by rotating the rotating wheel 20; after tensioning, the friction resistance generated by the meshing and matching of the pawl 21 and the ratchet 12 can prevent the rotating wheel 20 from rotating, so that the traction rope body can be kept in a tight state, the loosening caused by the rotating wheel 20 rotating can not occur, the wire drive transmission effect with high sensitivity and high accuracy can be kept in the use process, the wire drive transmission device is convenient to use in medical intervention equipment, and the wire drive transmission device is better suitable for high-standard use requirements in medical occasions. In a word, in the split type pivot assembly process that this embodiment disclosed, can freely adjust the rate of tension of haulage rope body through rotating runner 20, after adjusting in addition, runner 20 can not automatic gyration, and the resistance that utilizes butt contact between ratchet shaft 10 and runner 20 to produce can be to the pulling force of anti haulage rope body to keep the state of tightening of haulage rope body, be favorable to carrying out high accuracy control and transmission, facilitate the use.

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other.

It should be noted that, the specific structure and the working principle of the utility model are described by taking the split type rotating shaft in the interventional device as an example, but the application of the utility model is not limited by the split type rotating shaft in the interventional device, and the utility model can also be applied to the production and the use of the rotating shaft in other similar workpieces.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A split shaft, comprising:

a ratchet shaft, wherein a middle rod is arranged on the ratchet shaft, and a plurality of ratchets are annularly arranged on the ratchet shaft around the middle rod;

the rotating wheel is sleeved on the middle rod and used for coiling the traction rope body, and the rotating wheel rotates by taking the middle rod as an axis; and a plurality of pawls are annularly arranged on the edge of the rotating wheel, and the pawls are meshed with the ratchet teeth.

2. The split rotary shaft according to claim 1, wherein the ratchet is provided with a first inclined surface and a first vertical surface, an acute angle is formed between the first inclined surface and a rotation plane of the rotary wheel, and a right angle is formed between the first vertical surface and the rotation plane of the rotary wheel;

the pawl is provided with a second inclined plane and a second vertical plane, an acute angle is formed between the second inclined plane and the rotating plane of the rotating wheel, and the second inclined plane is attached to the first inclined plane and used for guiding the rotating wheel to rotate positively; and a right angle is formed between the second vertical surface and the rotating plane of the rotating wheel, and the second vertical surface is attached to the first vertical surface and is used for preventing the rotating wheel from reversely rotating.

3. The split rotary shaft according to claim 2, wherein a plurality of the ratchet teeth are provided, the plurality of ratchet teeth being uniformly distributed around the center rod;

the plurality of pawls are uniformly distributed around the middle rod;

the number of pawls is less than the number of ratchet teeth.

4. A split rotary shaft according to claim 3, wherein the pawl is provided with five and the ratchet is provided with twenty-four.

5. A split rotary shaft according to claim 3, wherein an assembly through hole is formed in the central position of the rotary wheel, and the assembly through hole is used for inserting the middle rod;

the length value of the middle rod is larger than the depth value of the assembly through hole.

6. The split rotary shaft according to claim 5, wherein a connecting part is arranged on one side of the ratchet shaft, which is away from the middle rod, and is used for butting a driving instrument; the connecting part and the middle rod are coaxially arranged and are both positioned at the center of the ratchet shaft.

7. The split rotary shaft according to claim 1, wherein the pawl comprises a connecting section, an elastic section and a contact section, the connecting section being convexly arranged on a side wall of the rotary wheel; the elastic section is convexly arranged on the side wall of the connecting section and extends along the circumferential direction of the rotating wheel; the contact section is arranged at one end of the elastic section, which is away from the connecting section, and is positioned on the surface of one side of the elastic section, which is towards the ratchet; the contact section is engaged with the ratchet.

8. The split rotary shaft according to claim 1, wherein the rotary wheel is provided with an annular wire groove for accommodating the traction rope body, and the cross section of the annular wire groove is horn-shaped.

9. A split rotary shaft according to any one of claims 1 to 8, wherein the ratchet shaft is a polycarbonate ratchet shaft, a polyvinyl chloride ratchet shaft, a polytetrafluoroethylene ratchet shaft or an acrylonitrile-butadiene-styrene copolymer ratchet shaft; and/or the number of the groups of groups,

the rotating wheel is a polycarbonate rotating wheel, a polyvinyl chloride rotating wheel, a polytetrafluoroethylene rotating wheel or an acrylonitrile-butadiene-styrene copolymer rotating wheel.

10. An interventional device, comprising a driving mechanism and an interventional catheter, wherein the interventional catheter is in transmission connection with the driving mechanism; the driving mechanism comprises a split type rotating shaft as claimed in any one of claims 1 to 9, wherein a plurality of steel wires are fixed in an inner tube at the front end of the interventional catheter, and the steel wires are coiled on the rotating wheel of the split type rotating shaft.