CN210204843U

CN210204843U - Sagittal saw

Info

Publication number: CN210204843U
Application number: CN201920362613.8U
Authority: CN
Inventors: Chuanwei Zheng; 郑传渭
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2020-03-31
Anticipated expiration: 2029-03-18

Abstract

The utility model provides a sagittal saw, includes casing, main shaft, connecting rod, pivot, the swing body and cutter clamping device, the main shaft is installed in the casing the inside, and its afterbody is equipped with power input interface, and the tip is equipped with the askew axle of eccentricity that links to each other with connecting rod one end, the other end of connecting rod articulates the central point at the swing body through the pivot of installing on the swing body and puts, the utility model overcomes the drawback of the transmission structure of current sagittal saw provides a noise reduction, vibration reduction, reduces to generate heat, improves the rotational speed, improves the sagittal saw of operation efficiency and operational safety nature.

Description

Sagittal saw

Technical Field

The utility model relates to a medical surgical operation instrument device, in particular to a sagittal saw.

Background

The sagittal saw is a common tool for cutting bone tissues in surgical operations, needs to cut the bone tissues quickly and accurately, and has the common problems of high noise, high vibration, serious heating, low rotating speed, poor safety in the operation process and adverse effect on patients.

In the prior art, a transmission mechanism of a sagittal saw usually utilizes a sliding sleeve on an eccentric shaft to press an inner wall of a swinging groove to complete swinging cutting, as disclosed in the attached drawings of chinese patents CN200720063569.8 and CN02226668.2, taking CN02226668.2 as an example, the following drawbacks of the transmission mechanism are analyzed: in the swinging process of the front shaft, because the width of the swinging groove at the tail part of the front shaft on the B-B section is changed, a yielding gap exists between the swinging groove and the sliding sleeve sleeved in the swinging groove when the sliding sleeve operates.

The sagittal saw with the transmission mechanism has the advantages that the working noise is high, the operation environment is influenced, meanwhile, the sagittal saw with the structure can generate impact vibration when working, the saw blade is caused to jump, the movement precision of the saw blade is low, the operation safety is influenced to a certain extent, in addition, the eccentric shaft, the sliding sleeve and the swinging groove of the sagittal saw are easy to wear, the working heat is serious, the rotating speed is low, and the operation efficiency is reduced.

Therefore, how to reduce noise, reduce vibration, reduce heat generation, and increase rotation speed of the sagittal saw is an important technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a sagittal saw can avoid the drawback that the drive mechanism of sagittal saw under the prior art brought, reaches noise reduction, vibration reduction, reduces to generate heat, improves the purpose at a rotating speed.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a sagittal saw comprises a shell, a main shaft, a connecting rod, a shaft pin, a swinging body and a cutter clamping device, a first cavity for the connecting rod and the swinging body to move and to move is arranged in the shell, the main shaft is arranged in the shell, the tail part of the connecting rod is provided with a power input interface, the end part of the connecting rod is provided with an eccentric skew shaft connected with one end of a connecting rod, the other end of the connecting rod is hinged at the central position of a swinging body through a shaft pin arranged on the swinging body, a second cavity which is mutually abducted when the swinging body and the connecting rod move is arranged between the swinging body and the connecting rod, two sides of the second cavity are provided with fulcrum shafts connected with the shell, the cutter clamping device is arranged at the front end of the swinging body, and the shaft axis of the main shaft, the shaft axis of the eccentric inclined shaft at the front end of the main shaft, the shaft axis of the fulcrum shafts at two sides of the swinging body and the connecting rod are hinged at a central position of the swinging body through a shaft pin and are intersected at one point.

Preferably, the shell comprises an inner shell, a front outer shell sleeved on the outer surface of the inner shell, and a rear outer shell nested and connected with the inner shell.

Preferably, the connecting rod is provided with bearings in the holes at both ends, and the end surface of the hole at one end is also provided with a bearing capable of bearing axial load.

Preferably, the tool holding device comprises an elastic sleeve inserted into the front end hole of the oscillating body and a locking sleeve locked on the front end of the oscillating body.

The beneficial effects of the utility model, compared with the prior art, the utility model discloses a sagittal saw's advantage lies in: reduce noise, reduce vibration, reduce heat generation and improve rotating speed.

Drawings

In the embodiment of the present invention, the relative position between the connecting rod and the oscillating body can have two structural modes, one mode is that one end of the connecting rod is located in the cavity of the oscillating body, the other mode is that the oscillating body is located in the cavity of one end of the connecting rod, in order to more clearly illustrate the technical solution of the embodiment of the present invention, the structural mode that one end of the connecting rod is located in the cavity of the oscillating body is taken as an embodiment, the drawings needed to be used in the description are simply introduced, obviously, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, under the premise of not paying creative work, other drawings can be obtained according to the drawings.

FIG. 1 is a cross-sectional view of a front view of a sagittal saw of the preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a top view of a sagittal saw of the preferred embodiment of the present invention;

FIG. 3 is a perspective view of a knife for use with a sagittal saw of the preferred embodiment of the present invention;

FIG. 4 is an exploded view of a sagittal saw of the preferred embodiment of the present invention;

Detailed Description

To explain technical contents and structural features of the present invention in detail, the following detailed description is further made in conjunction with the embodiments and the accompanying drawings.

The sagittal saw is characterized by comprising a shell (1), a main shaft (2), a connecting rod (3), a shaft pin (4), a swinging body (5) and a cutter clamping device (6), wherein a first cavity (10101) which can be used for the connecting rod (3) and the swinging body (5) to move is arranged in the shell (1), the main shaft (2) is arranged in the shell (1), the tail part of the main shaft is provided with a power input interface (201), the end part of the main shaft is provided with an eccentric skew shaft (202) connected with one end of the connecting rod (3), the other end of the connecting rod (3) is hinged at the central position of the swinging body (5) through a shaft pin (4) arranged on the swinging body (5), the swinging body (5) and a second cavity (502) which can move away from each other when the connecting rod (3) moves exist, supporting point shafts (501) connected with the shell (1) are arranged on two sides of the main shaft pin, and the cutter clamping device (6) is arranged at the front end (503), the axis of the main shaft (2) and the axis of the eccentric skew shaft (202) at the front end thereof, the axes of the fulcrum shafts (501) at the two sides of the swinging body (5), and the connecting rod (3) are hinged at the center of the swinging body (5) through a shaft pin (4) to intersect at one point.

When the cutting tool is used, a saw handle (701) of the cutting tool (7) is inserted into an elastic sleeve (602) in a hole at the front end (503) of a swinging body (5), a saw handle wing (70101) on the saw handle (701) is clamped in a lip clamping seam (60201) of the elastic sleeve (602), a locking sleeve (601) is locked, a driving motor connected with a power input interface (201) at the tail part of a main shaft (2) is started, the driving motor rotates to drive the main shaft (2) to rotate, the main shaft (2) drives an eccentric skew shaft (202) at the front end of the main shaft to rotate, the eccentric skew shaft (202) drives the swinging body (5) to swing back and forth through a connecting rod (3), and the swinging body (5) drives the cutting tool (7) to swing back and forth through a cutting tool clamping device (6) fixed at the front end (503) of the swinging body to.

Claims

1. The sagittal saw is characterized by comprising a shell (1), a main shaft (2), a connecting rod (3), a shaft pin (4), a swinging body (5) and a cutter clamping device (6), wherein a first cavity (10101) which can be used for the connecting rod (3) and the swinging body (5) to move is arranged in the shell (1), the main shaft (2) is arranged in the shell (1), the tail part of the main shaft is provided with a power input interface (201), the end part of the main shaft is provided with an eccentric skew shaft (202) connected with one end of the connecting rod (3), the other end of the connecting rod (3) is hinged at the central position of the swinging body (5) through the shaft pin (4) arranged on the swinging body (5), the swinging body (5) and a second cavity (502) which can move when the connecting rod (3) moves, two sides of the swinging body (5) are provided with fulcrum shafts (501) connected with the shell (1), the cutter clamping device (6) is installed at the front end (503) of the swinging body (5), and the axis of the main shaft (2) and the axis of the eccentric skew shaft (202) at the front end of the main shaft, the axis of the fulcrum shafts (501) at two sides of the swinging body (5) and the central position of the connecting rod (3) hinged to the swinging body (5) through the shaft pin (4) are intersected at one point.

2. A sagittal saw according to claim 1, wherein the housing (1) comprises an inner housing (101), a front outer housing (102) for engaging around the outer surface of the inner housing (101), and a rear outer housing (103) for nestingly engaging with the inner housing (101).

3. A sagittal saw according to claim 1, wherein the link (3) has a first bearing (30101) mounted in one end bore (301), a second bearing (30201) mounted in the other end bore (302), and a third bearing (30202) on the end face of the other end bore (302) for axial load.