阅读说明：本技术 摆角可调的磨削手柄动力传动机构及磨削刀具 (Grinding handle power transmission mechanism with adjustable swing angle and grinding tool ) 是由 郭毅军 赵正 覃聪 程圣茗 于 2019-09-29 设计创作，主要内容包括：本发明提供一种摆角可调的磨削手柄动力传动机构及磨削刀具,包括设置在壳体内的输入轴和输出轴,输入轴与输出轴之间设置有用于传递动力的中间传动件,输入轴上偏心设置有偏心传动件,中间传动件具有与输入轴的偏心传动件配合的输入部以及与输出轴配合的输出部,偏心传动件与输入部将输入轴的单向旋转运动转化为中间传动件的往复摆动,输出部带动输出轴往复摆动；壳体上还设置有调节结构,用于调节调节中间传动件、输入轴和输出轴中其中一个与另外两个之间的相对距离。本发明将连续单向圆周旋转运动转化为圆周方向上一定角度范围内的往复摆动,从而避免刀头缠绕住软组织；并且能够实现摆角的调节,适应不同摆动幅度的需求。(The invention provides a grinding handle power transmission mechanism with an adjustable swing angle and a grinding cutter, which comprise an input shaft and an output shaft which are arranged in a shell, wherein an intermediate transmission part for transmitting power is arranged between the input shaft and the output shaft; the shell is also provided with an adjusting structure for adjusting and adjusting the relative distance between one of the intermediate transmission member, the input shaft and the output shaft and the other two of the intermediate transmission member, the input shaft and the output shaft. The invention converts continuous unidirectional circular rotation motion into reciprocating swing within a certain angle range in the circumferential direction, thereby preventing the cutter head from winding soft tissues; and the adjustment of the swing angle can be realized, and the requirements of different swing amplitudes are met.)

1. The utility model provides a pivot angle adjustable grinding handle power transmission for transmit the power of power handle to the tool bit, its characterized in that: the tool comprises an input shaft and an output shaft, wherein the input shaft is arranged in a shell and used for connecting power, the output shaft is used for connecting a tool bit, an intermediate transmission part used for transmitting power is arranged between the input shaft and the output shaft, an eccentric transmission part is eccentrically arranged on the input shaft, the intermediate transmission part is provided with an input part matched with the eccentric transmission part of the input shaft and an output part matched with the output shaft, the eccentric transmission part and the input part convert the unidirectional rotation motion of the input shaft into the reciprocating swing of the intermediate transmission part, and the output part transmits the power which swings back and forth to the output shaft to drive the output shaft to swing back and forth; the shell is further provided with an adjusting structure, the adjusting structure is used for driving the middle transmission piece, the input shaft or the output shaft to deviate in the direction perpendicular to the axis of the input shaft, and the relative distance between one of the middle transmission piece, the input shaft and the output shaft and the other two of the middle transmission piece, the input shaft and the output shaft is adjusted.

2. The swing angle adjustable grinding handle power transmission mechanism as claimed in claim 1, wherein: adjusting the relative distance between one of the intermediate transmission member, the input shaft, and the output shaft and the other two of them comprises: adjusting the offset distance of the pivot center of the intermediate transmission member relative to the axis of the input shaft and the axis of the output shaft, adjusting the offset distance of the axis of the input shaft relative to the pivot center of the intermediate transmission member, or adjusting the offset distance of the eccentric transmission member relative to the pivot center of the intermediate transmission member, adjusting the offset distance of the axis of the output shaft relative to the pivot center of the intermediate transmission member, or adjusting the offset distance of the output part relative to the axis of the output shaft.

3. The swing angle adjustable grinding handle power transmission mechanism as claimed in claim 1, wherein: the input shaft is installed in the shell through a first bearing, the eccentric transmission part is a first transmission shaft eccentrically arranged at the output end of the input shaft, and a second bearing is sleeved on the first transmission shaft.

4. The swing angle adjustable grinding handle power transmission mechanism of claim 3, wherein: the middle transmission part comprises an intermediate shaft, the input part is a pair of first lug plates arranged at the input end of the intermediate shaft, and the second bearing is positioned between the two first lug plates and is tangent to the first lug plates.

5. The swing angle adjustable grinding handle power transmission mechanism of claim 4, wherein: the output part is a second transmission shaft arranged at the output end of the intermediate shaft, the second transmission shaft is eccentrically arranged relative to the intermediate shaft, and a third bearing is sleeved on the second transmission shaft.

6. The swing angle adjustable grinding handle power transmission mechanism of claim 5, wherein: the input of output shaft is provided with two second otic placodes relatively, the third bearing is located between two second otic placodes, and with the second otic placode is tangent.

7. The swing angle adjustable grinding handle power transmission mechanism as claimed in claim 1, wherein: the axial lines of the input shaft and the output shaft are overlapped, or the input end of the input shaft is connected with a power access shaft through a speed reducing mechanism, the input shaft is installed on the shell through an eccentric bearing seat, the axial lines of the output shaft and the power access shaft are overlapped, and the axial line of the input shaft is offset relative to the axial line of the output shaft.

8. The swing angle adjustable grinding handle power transmission mechanism as claimed in any one of claims 1 to 7, wherein: the adjusting structure comprises a supporting seat for mounting the intermediate transmission member and an adjusting part for enabling the supporting seat to move along the direction perpendicular to the axis of the input shaft, the intermediate transmission member is rotatably mounted on the supporting seat, the rotating center line of the intermediate transmission member is parallel to the axis of the input shaft, and when the adjusting part is operated, the supporting seat drives the intermediate transmission member to deviate relative to the input shaft and the output shaft.

9. The swing angle adjustable grinding handle power transmission mechanism of claim 8, wherein: the support seat is an adjusting shaft which is vertically installed on the shell relative to the input shaft, an external thread is arranged at one end of the adjusting shaft, the adjusting component is a nut which is rotatably arranged on the shell along the axis of the adjusting component, the nut is sleeved on the threaded section of the adjusting shaft, and the shell limits the movement of the nut in the axial direction of the adjusting shaft.

10. The swing angle adjustable grinding handle power transmission mechanism of claim 8, wherein: and the shell is provided with a limiting structure for limiting the rotation of the supporting seat.

11. The swing angle adjustable grinding handle power transmission mechanism of claim 9, wherein: the mounting groove has been seted up on the shells inner wall, the first end and the adjusting part cooperation of regulating spindle, the second end of regulating spindle stretches into in the mounting groove, be provided with elastic element in the mounting groove, elastic element supports the second end at the regulating spindle.

12. The swing angle adjustable grinding handle power transmission mechanism of claim 11, wherein: the supporting seat is characterized in that a window used for installing the supporting seat is formed in the shell, a cover plate with a through hole is installed on the window, and the nut is installed in the through hole of the cover plate and extends out of the cover plate.

13. A grinding tool characterized by: comprising the swing angle adjustable grinding handle power transmission mechanism of any one of claims 1-12.

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a power transmission mechanism of a grinding handle with an adjustable swing angle and a grinding cutter.

Background

In surgical operation, a medical grinding tool is generally used for grinding bone tissues or soft tissues in a human body, and the conventional grinding tool generally adopts a power handle to drive a grinding head/tool bit to rotate at a high speed for grinding. Because the grinding head/the cutter head do 360-degree circular rotation motion, the hidden trouble of winding the surrounding soft tissues exists in the operation process, and the soft tissues can be twisted off once being wound under the condition of high-speed rotation; particularly, the damage degree to soft tissues such as blood vessels, nerves and the like is higher, and the damage to patients caused by the fact that the cutting edge of the grinding head/the cutter head winds the nerves is very large.

Although grinding tools capable of oscillating back and forth are available, the angular range of oscillation is not adjustable, and thus the adaptability is poor.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a grinding handle power transmission mechanism with an adjustable swing angle, which changes the circular motion into reciprocating swing, prevents the cutter head from winding around soft tissues, and can adjust the swing angle.

In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:

A grinding handle power transmission mechanism with an adjustable swing angle is used for transmitting power of a power handle to a cutter head and comprises an input shaft and an output shaft, wherein the input shaft is arranged in a shell and used for connecting the power, the output shaft is used for being connected with the cutter head, an intermediate transmission member used for transmitting the power is arranged between the input shaft and the output shaft, an eccentric transmission member is eccentrically arranged on the input shaft, the intermediate transmission member is provided with an input part matched with the eccentric transmission member of the input shaft and an output part matched with the output shaft, the eccentric transmission member and the input part convert the unidirectional rotation motion of the input shaft into the reciprocating swing of the intermediate transmission member, and the output part transmits the power which swings back and forth to the output shaft to drive the output shaft to; the shell is further provided with an adjusting structure, the adjusting structure is used for driving the middle transmission piece, the input shaft or the output shaft to deviate in the direction perpendicular to the axis of the input shaft, and the relative distance between one of the middle transmission piece, the input shaft and the output shaft and the other two of the middle transmission piece, the input shaft and the output shaft is adjusted.

By adopting the structure, the circular rotation mode of the traditional tool bit is changed, continuous unidirectional circular rotation motion is converted into reciprocating swing within a certain angle range in the circumferential direction, and after the tool bit is connected with the power output shaft, the tool bit reciprocates in the circumferential direction of the power output shaft around the central line of the power output shaft, so that the tool bit is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head does reciprocating swing, and the damage to the soft tissue is reduced. In addition, because the intermediate transmission member is arranged between the input shaft and the output shaft, the offset distance between the input shaft and the intermediate transmission member and/or between the output shaft and the intermediate transmission member can be changed by adjusting the input shaft, the output shaft or the intermediate transmission member, so that the swing amplitude in the transmission process is changed, the adjustment of the swing angle is realized, and the requirements of different swing amplitudes are met.

Alternatively, adjusting the relative distance between one of the intermediate transmission, the input shaft and the output shaft and the other two may be performed in one of the following ways: adjusting the offset distance of the pivot center of the intermediate transmission member relative to the axis of the input shaft and the axis of the output shaft, adjusting the offset distance of the axis of the input shaft relative to the pivot center of the intermediate transmission member, adjusting the offset distance of the eccentric transmission member relative to the pivot center of the intermediate transmission member, adjusting the offset distance of the pivot center of the intermediate transmission member relative to the axis of the output shaft, adjusting the offset distance of the axis of the output shaft relative to the pivot center of the intermediate transmission member, or adjusting the offset distance of the output part relative to the axis of the output shaft.

Optionally, the input shaft is installed in the housing through a first bearing, the eccentric transmission member is a first transmission shaft eccentrically arranged at an output end of the input shaft, and the first transmission shaft is sleeved with a second bearing.

Optionally, the intermediate transmission member comprises an intermediate shaft, the input part is a pair of first lugs arranged at an input end of the intermediate shaft, and the second bearing is located between the two first lugs and is tangent to the second lug.

Optionally, the output part is a second transmission shaft arranged at the output end of the intermediate shaft, the second transmission shaft is eccentrically arranged relative to the intermediate shaft, and a third bearing is sleeved on the second transmission shaft.

Optionally, the input end of the output shaft is provided with two second ear plates oppositely, and the third bearing is located between the two second ear plates and tangent to the second ear plates.

optionally, the input shaft coincides with an axis of the output shaft, or the input end of the input shaft is connected with a power input shaft through a speed reduction mechanism, the input shaft is mounted on the housing through an eccentric bearing seat, the output shaft coincides with an axis of the power input shaft, and the axis of the input shaft is offset relative to the axis of the output shaft.

Optionally, the adjusting structure comprises a supporting seat for mounting the intermediate transmission member and an adjusting member for moving the supporting seat in a direction perpendicular to the axis of the input shaft, the intermediate transmission member is rotatably mounted on the supporting seat, the rotation center line of the intermediate transmission member is parallel to the axis of the input shaft, and when the adjusting member is operated, the supporting seat drives the intermediate transmission member to shift relative to the input shaft and/or the output shaft.

Alternatively, the support base is an adjusting shaft mounted on the housing perpendicularly to the input shaft, one end of the adjusting shaft has an external thread, the adjusting member is a nut rotatably provided on the housing along its own axis, the nut is fitted over a threaded section of the adjusting shaft, and the housing restricts the movement of the nut in the axial direction of the adjusting shaft.

optionally, a limiting structure for limiting the rotation of the supporting seat is arranged on the shell.

Optionally, an installation groove is formed in the inner wall of the shell, the first end of the adjusting shaft is matched with the adjusting part, the second end of the adjusting shaft extends into the installation groove, an elastic element is arranged in the installation groove, and the elastic element abuts against the second end of the adjusting shaft.

Optionally, a window for installing the supporting seat is formed in the shell, a cover plate with a through hole is installed on the window, and the nut is installed in the through hole of the cover plate and extends out of the cover plate.

The invention also provides a grinding tool which comprises the power transmission mechanism of the grinding handle with the adjustable swing angle.

as mentioned above, the beneficial effects of the invention are: according to the invention, the circular rotation motion mode of the traditional tool bit is changed, continuous rotation motion is converted into circular reciprocating swing within a certain angle range, and after the tool bit is connected with the power output shaft, the tool bit swings around the central line of the power output shaft in a reciprocating manner along the circumferential direction, so that the tool bit is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head does reciprocating swing, and the damage to the soft tissue is reduced.

In addition, because the intermediate transmission member is arranged between the input shaft and the output shaft, the position of the input shaft, the output shaft or the intermediate transmission member in the direction perpendicular to the axis of the handle can be adjusted through the adjusting structure, the relative offset between the input shaft and the intermediate transmission member or between the output shaft and the intermediate transmission member is changed, the swing amplitude in the transmission process is changed, the adjustment of a swing angle is realized, and the requirements of different swing amplitudes are met.

Drawings

FIG. 1 is a schematic view of the mounting of a power transmission mechanism on a handle housing in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic view of a transmission structure of a power transmission mechanism according to an embodiment of the present invention;

FIGS. 4 and 5 are exploded views of a power transmission mechanism in an embodiment of the present invention;

FIG. 6 is a schematic view of the construction of an intermediate transmission member according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an output shaft according to an embodiment of the present invention;

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

FIG. 9 is a schematic view of a cover plate according to an embodiment of the present invention

Fig. 10 is a schematic view of another embodiment of a power transmission mechanism in an embodiment of the present invention.

part number description:

100-a housing; 101-mounting grooves; 200-an input shaft; 201-a first drive shaft; 202-a second bearing; 203-a bearing seat; 204-a first bearing; 300-intermediate shaft; 301-a first ear plate; 302-a second drive shaft; 303-a third bearing; 304-a fifth bearing; 400-an output shaft; 401-a second ear plate; 402-a fourth bearing; 500-a drive pawl; 600-a support seat; 601-a thread section; 602-a nut; 603-a resilient element; 604-a via; 605-rotation limiting block; 606-a knob; 700-a power take-in shaft; 800-a speed reduction mechanism; 900-cover plate; 901-a limit groove; 902-limit step.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

In this case, the front-back direction is a direction toward the patient when the grinding tool is in operation, and a direction away from the patient is a direction away from the patient.