阅读说明：本技术 一种刀具手柄的动力输入机构及刀具手柄 (Power input mechanism of cutter handle and cutter handle ) 是由 田秀芬 赵勇 何朝东 王绘虎 于 2021-10-10 设计创作，主要内容包括：本发明涉及一种刀具手柄的动力输入机构及刀具手柄,属于医疗器械技术领域。该刀具手柄包括动力输入机构、动力输出机构和支撑组件,动力输入机构包括壳体和位于所述壳体内的动力输入部件,动力输入部件包括若干轴承、转动设置于轴承中的输入轴,及用于接入动力的弹性对接组件,输入轴内部沿其轴向设置有安装孔,弹性对接组件伸入安装孔内,且弹性对接组件的前端沿轴向向前超过至少一个轴承的后侧面。将动力输入机构中的弹性对接组件放置在输入轴的安装孔内,并且弹性对接组件的前端较为靠前,可以有效节省弹性对接组件的安装空间,减小动力输入机构的长度,减轻刀具手柄的重量,便于医师使用,减少负荷和握持力。(The invention relates to a power input mechanism of a cutter handle and the cutter handle, belonging to the technical field of medical instruments. The cutter handle comprises a power input mechanism, a power output mechanism and a supporting assembly, wherein the power input mechanism comprises a shell and a power input part which is positioned in the shell, the power input part comprises a plurality of bearings, an input shaft which is rotatably arranged in the bearings, and an elastic butt joint assembly which is used for connecting power, a mounting hole is formed in the input shaft along the axial direction, the elastic butt joint assembly stretches into the mounting hole, and the front end of the elastic butt joint assembly forwards exceeds the rear side face of at least one bearing along the axial direction. The elastic butt joint assembly in the power input mechanism is placed in the mounting hole of the input shaft, and the front end of the elastic butt joint assembly is closer to the front, so that the mounting space of the elastic butt joint assembly can be effectively saved, the length of the power input mechanism is reduced, the weight of the cutter handle is reduced, convenience is brought to doctors to use, and the load and the holding force are reduced.)

1. The utility model provides a power input mechanism of cutter handle, includes casing (110) and is located power input part (111) in casing (110), power input part (111) include a plurality of bearings, rotate set up in input shaft (112) in the bearing, and be used for the elasticity butt joint subassembly of access power, characterized in that, input shaft (112) are inside to be provided with mounting hole (116) along its axial, elasticity butt joint subassembly stretches into in mounting hole (116), just the front end of elasticity butt joint subassembly surpasss at least one along the axial forward the trailing flank of bearing.

2. The power input mechanism of a knife handle of claim 1, characterized in that the mounting hole (116) extends inwardly from a rear end of the input shaft (112), a front end of the resilient docking assembly being adjacent to a front end of the input shaft (112).

3. The power input mechanism of a tool handle according to claim 1, wherein the elastic docking assembly includes an elastic member and a shift fork (114), a front end of the shift fork (114) is slidably disposed in the mounting hole (116) along an axial direction of the input shaft (112) and is connected to the input shaft (112) in a synchronous rotation manner, and the elastic member is disposed in the mounting hole (116) and makes the shift fork (114) have a tendency to move toward a rear portion of the housing (110).

4. The power input mechanism of a tool handle of claim 1, wherein the bearings comprise a first bearing and a second bearing disposed at opposite ends of the input shaft (112), respectively.

5. The power input mechanism of a tool handle of claim 4, wherein a bushing for limiting is disposed between the first bearing and the second bearing.

6. The power input mechanism of a tool handle of claim 1, wherein the bottom of the mounting hole (116) is provided with a vent hole.

7. The power input mechanism of the tool handle according to claim 3, characterized in that the side wall of the input shaft (112) is symmetrically provided with two axial strip-shaped holes (118), and the front end of the shifting fork (114) is provided with a sliding pin (117) which is in sliding fit with the two strip-shaped holes.

8. The power input mechanism of the cutter handle according to claim 3, characterized in that the rear end of the shifting fork (114) is provided with a clamping through groove (121), and the tops of two sides of the clamping through groove (121) are respectively provided with a pyramid structure (122).

9. The power input mechanism of a tool handle according to claim 1, wherein the power input mechanism (11) further comprises an intermediate component (130) with a lap edge (123) arranged on the outer side, the housing (110) is internally provided with a stepped hole matched with the lap edge (123), the intermediate component (130) is detachably inserted into the housing (110) and is fixed, and the input shaft (112) is rotatably arranged in the intermediate component (130) through the bearing.

10. The power input mechanism of a tool handle of claim 9, the intermediate assembly (130) includes a bushing (131) and a positioning sleeve (132), the inner surface of the housing (110) has a first step and a second step, the outer side of the shaft sleeve (131) is provided with a first lapping edge, the inner side of the shaft sleeve is provided with a stepped hole, the first lapping edge is abutted against the first step, the positioning sleeve (132) comprises a supporting cylinder and a mounting cylinder, one end of the supporting cylinder is connected with the mounting cylinder, the other end of the supporting cylinder is inserted into the shaft sleeve (131), a second lapping edge is arranged on the outer side of the mounting cylinder and is abutted against the second step, the input shaft (112) is arranged in the shaft sleeve (131) and the positioning sleeve (132) in a penetrating mode, and the bearing is located between the input shaft (112) and the supporting cylinder.

11. A tool handle, characterized in that the tool handle (10) comprises a power take-off (14) and a power take-off (11) according to any one of claims 1-10, the rear end of the power take-off (14) being connected to the power take-off (11).

12. The cutter handle of claim 11 wherein the power take off mechanism (14) comprises a connector barrel (140), a power take off assembly (142) and a lock sleeve (141); the side wall of the connecting cylinder (140) is provided with a spiral groove (143); the power output assembly (142) comprises an output shaft (144), a jacket (146) and a movable piece (148), the output shaft (144) is rotatably arranged in the connecting cylinder (140), the output shaft (144) is provided with a clamping hole (150) with a bell mouth (149), and the jacket (146) is slidably inserted into the clamping hole (150) and provided with a wedge-shaped groove (152) matched with the bell mouth (149); the movable piece (148) is arranged in the spiral groove (143), and the lock sleeve (141) is rotatably sleeved on the connecting cylinder (140) and can drive the jacket (146) to move along the axial direction of the output shaft (144) through the movable piece (148).

13. The knife handle according to claim 12, characterized in that the power output assembly (142) further comprises a driven member (145), the driven member comprises a pushing sleeve (154) and a collar (155), the pushing sleeve (154) is slidably disposed inside the connecting cylinder (140), an annular groove (153) is disposed on a circumferential surface of the pushing sleeve (154), the movable member (148) is movably disposed in the annular groove (153), the collar (155) is slidably disposed on the output shaft (144) and connected with the jacket (146), and the movable member (148) can push the collar (155) to move through the pushing sleeve (154) when moving along the spiral groove (143).

14. The cutter handle of claim 13, wherein the power take off assembly (142) further comprises a return spring (147), the return spring (147) being sleeved on the output shaft (144) and having a tendency for the collar (155) to move towards the rear of the power take off mechanism (14).

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a power input mechanism of a cutter handle and the cutter handle.

Background

In the field of minimally invasive surgery, the surgical power instrument occupies an important position, and the surgical power instrument is applied to bone tissue surgeries of departments such as ear-nose-throat department, orthopaedics department, neurosurgery department, spinal surgery and the like, can provide multiple functional applications such as grinding, milling, drilling, sawing and the like, and becomes a surgical instrument which is difficult to replace clinically. The operation power apparatus mainly comprises a cutter, a cutter handle and a handheld power motor. The cutter is clamped at the front end of the cutter handle. The hand-held power motor is clamped at the rear end of the cutter handle, and the motor output shaft of the hand-held power motor is in butt joint with the power input shaft inside the cutter handle to provide power for the cutter.

In order to facilitate the butt joint between the motor output shaft and the handle power input shaft and avoid rigid contact between the motor output shaft and the handle power input shaft, an elastic butt joint component is arranged on the handle power input shaft. The elastic butt joint component comprises a spring and a shifting fork. The shifting fork is arranged at one end of the power input shaft in a sliding fit manner and can synchronously rotate with the power input shaft. The other end of the shifting fork is clamped with the output shaft of the motor. The spring is sleeved on the power input shaft, one end of the spring is abutted against the power input shaft, and the other end of the spring is abutted against the shifting fork, so that the shifting fork is guaranteed to be in real-time contact with the motor output shaft. The existing cutter handle is too long in length and heavy in weight, so that a doctor is overloaded, the fatigue of the doctor is easily increased, the operation precision is restricted and reduced, and the treatment effect is influenced.

Disclosure of Invention

In view of this, an object of the present invention is to provide a power input mechanism of a tool handle and a tool handle, in which an elastic docking assembly in the power input mechanism is disposed in a mounting hole of an input shaft, and the elastic docking assembly is located forward, so as to effectively save the mounting space of an adjusting spring, reduce the length of the power input mechanism, reduce the weight of the tool handle, facilitate the use of a doctor, and reduce the load and the holding force.

The technical scheme of the invention is as follows:

the invention provides a power input mechanism of a cutter handle, which comprises a shell and a power input part positioned in the shell, wherein the power input part comprises a plurality of bearings, an input shaft rotationally arranged in the bearings and an elastic butt joint component for connecting power, a mounting hole is arranged in the input shaft along the axial direction of the input shaft, the elastic butt joint component extends into the mounting hole, and the front end of the elastic butt joint component axially forwards exceeds the rear side face of at least one bearing.

As an alternative to the above embodiment, the mounting hole extends inwardly from a rear end of the input shaft, and a front end of the resilient docking assembly is adjacent to a front end of the input shaft.

As an alternative to the above embodiment, the elastic docking assembly includes an elastic member and a shifting fork, a front end of the shifting fork is slidably disposed in the mounting hole along an axial direction of the input shaft and is connected to the input shaft in a manner of rotating synchronously, and the elastic member is disposed in the mounting hole and makes the shifting fork have a tendency to move towards a tail portion of the housing.

In the structure, the shifting fork and the input shaft synchronously rotate and can elastically move along the axial direction of the input shaft. By adopting the structure, the damage of the cutter handle and the motor caused by rigid collision when the motor output shaft and the power input component are clamped can be effectively avoided.

Meanwhile, the adjusting spring is arranged in the input shaft mounting hole, so that the length of the input shaft can be effectively reduced, the length of the cutter handle can be reduced, the weight of the cutter handle can be reduced, the load of a doctor can be reduced, the precision and the quality of the operation of the doctor can be improved, and the expected treatment effect of the operation can be ensured

As an alternative to the above embodiment, the input shaft is rotatably disposed in the housing through a plurality of bearings, and the front end of the elastic docking assembly is far away from the rear portion of the housing relative to any one of the bearings.

As an alternative to the above embodiment, the bearings include a first bearing and a second bearing respectively disposed at both ends of the input shaft.

The two bearings sleeved on the input shaft are positioned at two ends of the input shaft, so that the length of the cutter handle can be reduced. When power is transmitted, the phenomenon that the hanging length of one end of the input shaft close to the shifting fork is too long and vibration is easy to occur can be avoided, and the influence on power transmission is avoided.

And a bushing for limiting is arranged between the first bearing and the second bearing. The bush can support first bearing and second bearing, and bush, axle sleeve and position sleeve are fixed the bearing location and are fixed jointly, prevent first bearing and the unusual activity of second bearing, and fixed mode is simple reliable, easy dismounting.

As an alternative to the above embodiment, the bottom of the mounting hole is provided with a vent hole.

In the structure, the bottom of the mounting hole is provided with the exhaust air, so that the shifting fork can be conveniently assembled into the mounting hole of the input shaft, and the shifting fork can be conveniently axially and elastically moved in the mounting hole.

As an alternative of the above embodiment, the side wall of the input shaft is symmetrically provided with two axial bar-shaped holes, and the front end of the shifting fork is provided with a sliding pin in sliding fit with the two bar-shaped holes.

Axial bar hole is the hole of the axial extension of edge input shaft, and radial through-hole is the hole of the experience extension of edge input shaft, and the sliding pin makes the dismouting of shift fork more convenient.

As an alternative scheme of the embodiment, a clamping through groove is formed in the rear end of the shifting fork, the clamping through groove extends along the axial direction of the shifting fork, and the tops of the two sides of the clamping through groove are respectively provided with a pyramid structure.

Due to the adoption of the structure, when the motor output shaft is matched and clamped with the clamping through groove of the shifting fork, the pyramid-shaped structure can guide the motor output shaft and guide the motor output shaft to be clamped into the clamping through groove.

As an alternative to the above embodiment, the power input mechanism further includes an intermediate assembly having a lap edge on an outer side thereof, the housing has a stepped hole in an inner portion thereof matching the lap edge, the intermediate assembly (130) is detachably inserted into the housing (110) and fixed, and the input shaft (112) is rotatably disposed in the intermediate assembly (130) by at least two bearings.

When shoulder hole and overlap joint were followed the butt, middle subassembly was spacing, and the location of the middle subassembly of being convenient for, middle subassembly can carry out axial positioning to the input shaft, prevents that the input shaft from following self axial motion.

As an alternative of the above embodiment, the intermediate assembly includes a shaft sleeve and a positioning sleeve, the inner surface of the housing has a first step and a second step, the outer side of the shaft sleeve is provided with a first overlapping edge, the inner side of the shaft sleeve is provided with a stepped hole, the first overlapping edge abuts against the first step, the positioning sleeve includes a supporting cylinder and an installation cylinder, one end of the supporting cylinder is connected with the installation cylinder, the other end of the supporting cylinder is inserted into the shaft sleeve, the outer side of the installation cylinder is provided with a second overlapping edge, the second overlapping edge abuts against the second step, the input shaft is arranged in the shaft sleeve and the positioning sleeve in a penetrating manner, and the bearing is located between the input shaft and the supporting cylinder.

As an alternative to the above embodiment, the mounting cylinder is screwed to the housing.

As an alternative to the above embodiment, the mounting cylinder and the housing are fixed by bolts or screws.

In the above scheme, the shaft sleeve and the positioning sleeve are more convenient to disassemble and assemble.

The embodiment of the invention also provides a cutter handle, which comprises a power output mechanism, a supporting component and the power input mechanism, wherein the front end of the power output mechanism is connected with the supporting component, and the rear end of the power output mechanism is connected with the power input mechanism.

The supporting component is used for clamping and fixing the handle cutter, the power input mechanism is in transmission fit with the power output mechanism, and the power of the power motor can be transmitted to the handle cutter.

As an alternative to the above embodiment, the power take-off mechanism includes a connecting cylinder, a power take-off assembly, and a lock sleeve; the power output assembly comprises an output shaft, a jacket and a movable piece, the output shaft is rotatably arranged in the connecting cylinder, the output shaft is provided with a clamping hole with a bell mouth, and the jacket is slidably inserted in the clamping hole and provided with a wedge-shaped groove matched with the bell mouth; the movable part is arranged in the spiral groove, the lock sleeve is rotatably sleeved on the connecting cylinder and can drive the clamping sleeve to move along the axial direction of the output shaft through the movable part.

The horn mouth and the wedge-shaped groove are mutually matched, the radial clamping force of the clamping sleeve can be amplified, the clamping sleeve can be firmly clamped with a cutter, the circumferential force of the rotary lock sleeve can be converted into the axial force for pushing the driven piece and the clamping sleeve to move along the axial direction of the output shaft through the spiral groove, the spiral groove has an amplification effect on the axial force, and the clamping of the power output mechanism on the cutter is realized through small force, so that time and labor are saved.

As an alternative of the above embodiment, the power output assembly further includes a driven member, the driven member includes a push sleeve and a sleeve ring, the push sleeve is slidably disposed inside the connecting cylinder, an annular groove is disposed on a circumferential surface of the push sleeve, the movable member is movably disposed in the annular groove, the sleeve ring is slidably disposed on the output shaft and connected to the jacket, and the movable member can push the sleeve ring to move along the spiral groove.

In the above scheme, the moving part can move along the annular groove and push the push sleeve to move along the axial direction of the connecting cylinder, the push sleeve can push the lantern ring to move along the axial direction of the output shaft, and the lock sleeve rotates more smoothly.

As an alternative to the above embodiment, the follower further comprises a soft spring disposed in the connecting cylinder and tending to move the push sleeve away from the collar, and a gap exists between the push sleeve and the collar when the collet grips the tool handle.

In the above scheme, the soft spring can push the push sleeve to be away from the sleeve ring, and when the jacket clamps the cutter, the push sleeve is separated from the sleeve ring, the sleeve ring is not in contact with the push sleeve when rotating along with the output shaft, the sleeve ring and the push sleeve are not interfered with each other, and the rotation of the output shaft can be smoother.

As an alternative to the above embodiment, the movable member is a ball, and the cross section of the annular groove is circular arc.

In the scheme, the ball can roll along the annular groove, so that the lock sleeve can rotate more smoothly.

As an alternative to the above embodiment, the power take-off assembly further comprises a return spring that is sleeved on the output shaft and that causes the collar to have a tendency to move towards the tail of the power take-off mechanism.

The reset spring can apply pressure to the driven piece to prevent the jacket from abnormally moving.

The invention has the beneficial effects that:

according to the cutter handle provided by the invention, the improved power input mechanism is adopted, the elastic butt joint component is placed in the mounting hole of the input shaft, the elastic butt joint component is arranged in front, the normal work of a bearing cannot be influenced by the elastic butt joint component, the mounting space of the elastic butt joint component can be effectively saved, the length of the power input mechanism is reduced, the weight of the cutter handle is lightened, the cutter handle is convenient for doctors to use, and the load and the holding force are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic view of a knife handle according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a power input mechanism provided in an embodiment of the present invention;

FIG. 3 is a schematic view of the fork of FIG. 2;

fig. 4 is a schematic structural view of a power output mechanism provided in the embodiment of the invention;

FIG. 5 is a schematic structural view of the connector barrel of FIG. 4;

FIG. 6 is an enlarged view of part A of FIG. 4;

FIG. 7 is an enlarged view of a portion B of FIG. 4;

FIG. 8 is a schematic structural diagram of a push sleeve according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a socket member according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a lock sleeve according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a support assembly according to an embodiment of the present invention.

Icon:

10-a tool handle;

11-a power input mechanism; 14-a power take-off mechanism; 17-a support assembly;

110-a housing; 111-a power input component; 112-an input shaft; 113-adjusting a spring; 114-a fork; 115-a drive gear; 116-mounting holes; 117-sliding pin; 118-a bar-shaped hole; 119-a connecting rod; 120-a connector; 121-card through slot; 122-a pyramidal structure; 123-overlapping edge; 130-an intermediate component; 131-shaft sleeve; 132-a locating sleeve; 133-a bushing; 134-vent hole;

140-a connecting cylinder; 141-a lock sleeve; 142-a power take-off assembly; 143-helical groove; 144-an output shaft; 145-a follower; 146-a jacket; 147-a return spring; 148-moving parts; 149-horn mouth; 150-a clamping hole; 151-driven gear; 152-wedge groove; 153-annular groove; 154-push sleeve; 155-a collar; 156-a sliding pin; 157-strip-shaped through holes; 158-socket groove; 159-valving; 160-a drive slide; 161-socket piece;

170-end cylinder; 171-end cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Referring to fig. 1, an embodiment of the present invention provides a cutter handle 10, the cutter handle 10 may be externally connected with a cutter head, and a surgical instrument mounted with the cutter head is mainly applied to the field of minimally invasive surgery, especially to department surgeries such as ear-nose-throat department and orthopedics department, and is used for high-speed grinding of bone tissues.

The cutter handle 10 mainly comprises a power input mechanism 11, a power output mechanism 14 and a support component 17, wherein the front end of the power output mechanism 14 is connected with the support component 17, and the rear end of the power output mechanism is connected with the power input mechanism 11.

In this embodiment, the tool handle 10 is a bent-shank mechanism, the power input mechanism 11 is a bent-shank component, and the power output mechanism 14 is a straight-shank mechanism.

The various components of the tool handle 10 and their interconnection are described in detail below.

First, the specific structure of the power input mechanism 11 is as follows: referring to fig. 2, the power input mechanism 11 includes a housing 110, a power input part 111 and an intermediate assembly 130, the power input part 111 is located in the housing 110, the housing 110 is used for supporting and covering the power input part 111, and the power input part 111 is used for connecting with a motor and transmitting power to the power output mechanism 14.

The structure of the housing 110 can refer to the prior art, in this embodiment, the housing 110 adopts a bending structure, the bending angle can be set as required, and also can refer to the prior art, the interior of the housing 110 is hollow, and both ends are provided with openings.

In the present embodiment, a stepped hole is provided in the housing 110, a step is provided on the inner surface of the housing 110, and the size and shape of the housing 110 can be set as required.

The power input part 111 includes an input shaft 112 and an elastic docking assembly, wherein the elastic docking assembly includes an adjustment spring 113 and a shift fork 114.

The input shaft 112 is rotatably disposed in the housing 110, in this embodiment, at least two bearings are sleeved outside the input shaft 112, in this embodiment, two bearings are sleeved outside the input shaft 112, the two bearings are located between the input shaft 112 and the housing 110, and the input shaft 112 can rotate around its axis in the housing 110.

One end of the input shaft 112 is an input end, and the other end is an output end, as shown in fig. 1, a right end of the input shaft 112 is an input end, and a left end of the input shaft 112 is an output end.

The adjusting spring 113 of the elastic docking assembly in the prior art is sleeved outside the input shaft 112, so that the adjusting spring 113 and the bearing are not interfered with each other, which results in overlong length and heavy weight of the input shaft 112.

Specifically, the input end of the input shaft 112 is provided with a mounting hole 116, and the output end of the input shaft 112 is provided with a driving gear 115.

The mounting hole 116 is a groove or a blind hole extending inward from the input end of the input shaft 112 in the axial direction of the input shaft 112, and the depth of the mounting hole 116 is not limited, in this embodiment, the bottom of the mounting hole 116 is adjacent to the output end (front end) of the input shaft 112, the bottom of the mounting hole 116 is far from the tail of the housing 110 relative to any bearing, and the center line of the mounting hole 116 coincides with the center line of the input shaft 112.

In the present embodiment, the "front end" refers to an end close to the power output mechanism 14, and the "rear end" refers to an end far from the power output mechanism 14.

The shifting fork 114 is used for externally connecting a turbine shaft, the shifting fork 114 and the input shaft 112 can rotate synchronously, in this embodiment, please refer to fig. 3, the shifting fork 114 includes a connecting rod 119 and a connector 120, the connector 120 is disposed at one end of the connecting rod 119, the connector 120 is provided with a clamping through groove 121, the clamping through groove 121 penetrates through the shifting fork 114 along the axial direction of the shifting fork 114, two sides of the clamping through groove 121 are respectively provided with a pyramid-shaped structure 122, the pyramid-shaped structure 122 can guide the turbine shaft, and the turbine shaft is smoothly clamped into the clamping through groove 121 of the shifting fork 114.

One end of the connecting rod 119 is slidably disposed in the mounting hole 116, and the connection between the fork 114 and the input shaft 112 may be, but is not limited to, the following: connecting rod 119 is connected through slide pin 117 between with input shaft 112, is provided with two axial bar holes 118 on the input shaft 112, and bar hole 118 extends along input shaft 112's axial, and bar hole 118 and mounting hole 116 intercommunication, two bar hole 118 symmetry set up.

A radial through hole is provided in the connecting rod 119, and the radial through hole extends in the radial direction of the connecting rod 119.

Two ends of the sliding pin 117 respectively penetrate through the two strip-shaped holes 118 and the radial through hole, the sliding pin 117 is arranged along the radial direction of the input shaft 112, of course, the end part of the sliding pin 117 is limited by a limiting structure, the sliding pin is prevented from being abnormally separated along the radial direction of the input shaft 112, and the sliding pin 117 can move along the axial direction of the input shaft 112.

The slide pin 117 is connected to the connecting rod 119, and defines the connecting rod 119 to be movable only in the axial direction of the input shaft 112 and rotatable in synchronization with the input shaft 112.

In other embodiments, the connection manner between the connecting rod 119 and the input shaft 112 may also be a sliding slot and a sliding block, or the connecting rod 119 has a rectangular block-shaped structure, the mounting hole 116 has a square hole portion, etc., the rectangular block structure of the connecting rod 119 is inserted into the square hole portion of the mounting hole 116, the connecting rod 119 can move along the center line of the mounting hole 116 but cannot rotate in the mounting hole 116, and of course, an anti-dropping structure may be provided between the connecting rod 119 and the mounting hole 116, for example, a limit block is provided in the mounting hole 116.

The adjusting spring 113 is disposed in the mounting hole 116, the adjusting spring 113 is a compression spring, two ends of the adjusting spring 113 respectively abut against the bottom of the mounting hole 116 and the fork 114, and the adjusting spring 113 makes the fork 114 have a tendency to be separated from the mounting hole 116.

The provision of the air discharge hole 134 at the bottom of the mounting hole 116 facilitates the fitting of the connecting rod 119 into the mounting hole 116 of the input shaft 144 and also facilitates the elastic axial movement of the connecting rod 119 within the mounting hole 116.

At least two bearings are generally required to be arranged on the outer side of the input shaft 112, a certain distance exists between the two bearings, if the adjusting spring 113 is sleeved on the input shaft 112, one end of the adjusting spring 113 needs to be abutted against one of the bearings, and the structure requires that the length of the input shaft 112 is large to ensure that the adjusting spring 113 cannot fall off.

In this embodiment, the adjusting spring 113 is disposed inside the input shaft 112, so that the adjusting spring 113 is disposed on the input shaft 112 in parallel with the two bearings, and the front end of the adjusting spring 113 is away from the tail of the housing 110 relative to any one of the bearings, that is, the front end of the adjusting spring 113 is disposed forward in the axial direction beyond the rear side of any one of the bearings.

The adjusting spring 113 is arranged in the input shaft 112, the connecting rod 119 extends into the input shaft 112, and the connecting rod 119 can move in the input shaft 112 without interfering with external structures such as bearings, so that the length of the input shaft 112 is effectively reduced, the length of the rear end of the cutter handle 10 is reduced, the mass of the cutter handle 10 is reduced, the use by doctors is facilitated, and the load and the holding force are reduced. In actual operation, a doctor holds the cutter handle in a manner similar to pen holding, and since the weight of the power motor connected to the rear end of the cutter handle is greater than that of the cutter handle 10, and the rear end of the power motor is connected with a cable and other structures, the surgical power instrument can form a lever structure with the palm and the tiger mouth as a fulcrum in the doctor's hand, and the index finger and the thumb form a downward force F on the front end of the surgical power instrument to balance the gravity mg at the rear end of the surgical power instrument, that is, FS ═ mgL. By adopting the scheme, the length of the power input mechanism 11 of the cutter handle 10 is shortened, the weight is lightened, m and L are both reduced, and meanwhile, the length of S is unchanged, so that the force F required by a doctor is less, and the assembly is more convenient to hold.

Of course, if the doctor adopts other holding modes, the labor is saved.

By contrast, the length of the power input mechanism 11 of the cutter handle 10 adopting the technical point after the bending point is reduced by about 1/3 compared with that of the similar products, so that the weight of the cutter handle 10 is reduced by about 1/4.

The power input component 111 may be directly connected to the housing 110, or may be connected to the housing 110 through the intermediate assembly 130, in this embodiment, the power input component 111 is indirectly connected to the housing 110 through the intermediate assembly 130, an overlapping edge 123 is disposed on an outer side of the intermediate assembly 130, the overlapping edge 123 abuts against the stepped hole, the intermediate assembly 130 is detachably inserted into the housing 110, and the input shaft 112 is rotatably supported by the intermediate assembly 130.

The intermediate assembly 130 includes a sleeve 131, a positioning sleeve 132, and a bushing 133.

The inner surface of the housing 110 has a first step and a second step, the outer side of the shaft sleeve 131 is provided with a first overlapping edge, and the inner side of the shaft sleeve is provided with a stepped hole, and the first overlapping edge abuts against the first step.

The locating sleeve 132 comprises a supporting cylinder and an installation cylinder, one end of the supporting cylinder is connected with the installation cylinder, the other end of the supporting cylinder is inserted into the shaft sleeve 131, a second lap joint edge is arranged on the outer side of the installation cylinder, the second lap joint edge is abutted against the second step, and the installation cylinder and the shell 110 can be fixed through threads.

The input shaft 112 is disposed through the shaft sleeve 131 and the positioning sleeve 132, the input shaft 112 is rotatably connected to the supporting tube through two bearings, the bushing 133 is disposed outside the input shaft 112, two ends of the bushing 133 respectively abut against the bearings, and one of the bearings can abut against the mounting tube.

Next, the specific structure of the power output mechanism 14 is as follows: referring to fig. 4, the power output mechanism 14 includes a connecting cylinder 140, a lock sleeve 141, and a power output assembly 142.

The connecting cylinder 140 has an integral structure as described in the prior art, and the connecting cylinder 140 is hollow and has openings at both ends.

Referring to fig. 5, a spiral groove 143 is formed on a side wall of the connecting cylinder 140, the spiral groove 143 is spirally formed along a circumferential direction of the connecting cylinder 140, that is, the spiral groove 143 extends along both axial and circumferential directions of the connecting cylinder 140, a rotation angle of the spiral groove 143 is not limited, and the rotation angle is a central angle at which the spiral groove 143 rotates around a central line of the connecting cylinder 140.

The lock sleeve 141 is rotatably sleeved on the connecting cylinder 140, and an anti-slip groove is formed on the circumferential surface of the lock sleeve 141 and can extend in the axial direction of the lock sleeve 141.

Disposed within connector barrel 140 is a power take-off assembly 142, which power take-off assembly 142 includes an output shaft 144, a follower 145, a collet 146, a return spring 147, and a movable member 148.

The output shaft 144 is rotatably disposed in the connecting cylinder 140 through a bearing, one end of the output shaft 144 is an input end, and the other end is an output end, as shown in fig. 1, a right end of the output shaft 144 is an input end, a left end of the output shaft 144 is an output end,

the input end of the output shaft 144 is provided with a driven gear 151, and the output end of the output shaft 144 is provided with a clamping hole 150.

The driving gear 115 meshes with driven gear 151, and in this embodiment, the driving gear 115 all adopts bevel gear with driven gear 151, and the number of teeth of driving gear 115 and driven gear 151 is the same, has guaranteed that the two possesses the same revolution, and the uniformity of life has been guaranteed to the same monodentate load, is favorable to prolonging the whole life-span of handle.

The clamping hole 150 is a groove or a blind hole extending inward from the output end of the output shaft 144 along the axial direction of the output shaft 144, the depth of the clamping hole 150 is not limited, in this embodiment, the clamping hole 150 may extend to the middle of the input shaft 112 or adjacent to the input end of the output shaft 144, the clamping hole 150 does not penetrate through the output shaft 144, and the center line of the clamping hole 150 coincides with the center line of the output shaft 144.

As shown in fig. 6, the opening end of the holding hole 150 is provided with a flare 149, and the diameter of the flare 149 gradually decreases in a direction from the output end to the input end of the output shaft 144.

In the present embodiment, the collet 146 is hollow and is provided with a socket 161 inside (please refer to fig. 9 for structure of the socket 161), the socket 161 is fixed with the collet 146, the socket 161 is provided with a socket groove 158, the tool can be inserted into the collet 146 and the end of the tool can be inserted into the socket groove 158, so that the output shaft 144 of the power output assembly 142 and the collet 146 can drive the tool to rotate more stably.

The front end of the jacket 146 includes three split portions 159, each split portion 159 can be elastically deformed to a certain extent, and a contraction gap is provided between two adjacent split portions 159, and the contraction gap is provided along the axial direction of the jacket 146.

The outside of the end of the collet 146 is provided with a wedge groove 152 matching the flare 149, in this embodiment the wedge groove 152 is provided outside the head of the split 159.

The follower 145 is slidably sleeved on the output shaft 144, the follower 145 is located inside the connecting cylinder 140, and the follower 145 is adjacent to the spiral groove 143.

In the present embodiment, referring to fig. 7, the driven member 145 includes a pushing sleeve 154 and a collar 155, the pushing sleeve 154 and the collar 155 are both annular structures, the pushing sleeve 154 and the collar 155 are respectively sleeved on the output shaft 144, wherein one end of the pushing sleeve 154 abuts against one end of the collar 155.

Referring to fig. 8, an annular groove 153 may be formed on the circumferential surface of the push sleeve 154, and the annular groove 153 is disposed around the center line of the push sleeve 154, that is, the center line of the annular groove 153 coincides with the center line of the push sleeve 154.

The shape of the annular groove 153 is not limited, and in the present embodiment, the cross section of the annular groove 153 is circular arc.

The connection between the collar 155 and the collet 146 may be, but is not limited to, the following: two strip-shaped through holes 157 are symmetrically arranged on the side wall of the output shaft 144, the strip-shaped through holes 157 extend along the axial direction of the output shaft 144, and the strip-shaped through holes 157 are communicated with the clamping holes 150. The collar 155 is connected with the collet 146 through a sliding pin 156, the sliding pin 156 passes through two strip-shaped through holes 157 and can move along the axial direction of the output shaft 144, the sliding pin 156 passes through the collet 146 and both ends of the sliding pin are respectively connected with the collar 155, and in the embodiment, the sliding pin 156 passes through the collet 146 and the socket 161 and both ends of the sliding pin are respectively connected with the collar 155.

The collar 155 is reset by a reset spring 147, the reset spring 147 is a compression spring, the reset spring 147 is sleeved on the output shaft 144, and two ends of the reset spring 147 are respectively abutted against the collar 155 and the output shaft 144 (or a bearing, a washer and the like can be additionally arranged) so that the collar 155 has a tendency of moving towards the tail of the power output mechanism 14.

The reset spring 147 applies backward acting force to the pushing collar 155, pushes the collar 155 and the jacket to slide backward, so that the bell-mouth 149 extrudes the wedge-shaped groove 152, the jacket 146 contracts inward and clamps and fixes the cutter, the wedge-shaped groove 152 and the bell-mouth 149 amplify the force, the smaller the wedge angle is, the larger the amplification factor is, the larger the clamping force applied to the cutter by the clamp is ensured, and the cutter is not easy to fall off.

The collet 146 clamps or releases the tool by operating the lock sleeve 141, and the lock sleeve 141 and the collet 146 are driven by a movable member 148, a push sleeve 154 and the like.

Movable member 148 is movably disposed in spiral groove 143, and movable member 148 can move along spiral groove 143.

The movable element 148 may be block-shaped, cylindrical or spherical, and in this embodiment, the movable element 148 is a ball, and the ball and the movable element 148 are in rolling contact, so that the friction force is small and the operation is labor-saving.

The movable member 148 is in transmission fit with the pushing sleeve 154, and the fit mode can adopt, but is not limited to, the following scheme: the balls are rollably disposed in the annular groove 153.

In other embodiments, the annular groove 153 may not be disposed on the push sleeve 154, and the following scheme may be adopted: the movable element 148 is fixed on the lock sleeve 141, the right end of the push sleeve 154 is planar, the movable element 148 is in a block shape or a cylindrical shape, the movable element 148 abuts against the right end of the push sleeve 154, and the movable element 148 can push the push sleeve 154 to move leftwards when moving along the spiral groove 143.

Referring to fig. 10, a driving slide 160 is disposed on an inner surface of the lock sleeve 141, the driving slide extends along an axial direction of the lock sleeve 141, and the balls are movably disposed in the driving slide 160.

The lock sleeve 141 can drive the balls to move along the spiral grooves 143 when rotating, and the cooperation of the balls and the annular grooves 153 enables the push sleeve 154, the collar 155 and the clamping sleeve 146 to move along the axial direction of the output shaft 144.

After the lock sleeve 141 and the balls are reset, the clamping sleeve 146 can clamp the cutter, the reset spring 147 can prevent the cutter from abnormally moving, at the moment, the output shaft 144 drives the cutter to rotate, the push sleeve 154, the balls and the lock sleeve 141 are kept still, and the sleeve ring 155 can synchronously rotate along with the output shaft 144.

The use method and the operating principle of the power output mechanism 14 in the embodiment are as follows:

taking fig. 1 as an example, the lock sleeve 141 is screwed while keeping the connecting cylinder 140 still;

the lock sleeve 141 drives the balls to move along the spiral groove 143, at this time, the balls roll along the annular groove 153, and the balls are displaced in the axial direction of the connecting cylinder 140, so that the push sleeve 154 moves leftwards, the push sleeve 154 pushes the sleeve ring 155 and the jacket 146 to move leftwards, and the return spring 147 is compressed;

the segments 159 of the collet 146 gradually disengage from the gripping holes 150, the segments 159 opening;

placing the cutter in collet 146 with the end of the cutter inserted into socket slot 158;

when the lock sleeve 141 is screwed reversely, the lock sleeve 141 drives the balls to move along the spiral groove 143, and at this time, the balls roll along the annular groove 153, and the push sleeve 154 moves to the right due to the displacement of the balls in the axial direction of the connecting cylinder 140, and the return spring 147 pushes the collar 155 and the collet 146 to move to the right.

When the cutter needs to be disassembled, the operation is carried out according to the steps.

The steps can be added, deleted, modified, adjusted in sequence and the like as required.

The supporting component 17 is arranged at one end of the power output mechanism 14 far away from the power input mechanism 11, and the specific structure of the supporting component 17 is as follows: referring to fig. 11, the supporting assembly 17 includes an end cylinder 170 and an end cap 171, the end cylinder 170 is hollow, one end of the end cylinder 170 is connected to one end of the connecting cylinder 140, the other end of the end cylinder 170 is connected to the end cap 171, and the end cylinder 170 is in threaded connection with the connecting cylinder 140 and the end cylinder 170 is in threaded connection with the end cap 171.

A bearing, etc. may be provided inside the end cylinder 170 to support the cutter, so that the rotation of the cutter is smoother.

During actual installation, the thread locking agent can be added to all threaded joints of the tool handle 10, reverse unscrewing of the threaded joints is limited, stability of the threaded joints is guaranteed, the thread locking agent loses viscosity at high temperature and becomes solid small powder, and therefore the threaded joints added with the thread locking agent can be detached.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.