SU1364320A1 - Arrangement for working bones - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is to reduce the time and reduce the morbidity of the operation. The device has a housing 1 with a multistage gearbox 2, a drive and an output sleeve 3 with a cutting tool 4 and a shank 5. The gearbox is made planetary with a planet carrier 6 mounted in the sleeve 3 with the possibility of longitudinal movement of the shank 5 of the tool 4 when switching gear boxes 7-9 gears. The device allows automatic switching of the rotational speed of the cutting tool with the shank, depending on the diameter of the tool. 4 il.

Description

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This invention relates to medicine, in particular to surgical instruments. .

The purpose of the invention is to build time 1 and reduce the morbidity of the operation.

FIG. 1 shows a device, a longitudinal section, in the position of the minimum gear ratio of the gearbox (I drove position); in fig. 2 - the same, in the position of the average gear ratio (II position drove); in fig. 3 - the same, in the position of the maximum gear ratio of the box before, ah (III carrier position); in fig. 4 is a view A of FIG. one.

The device has a corus 1 with a multistage gearbox 2, a drive (not shown) and an output sleeve 3 with a cutting tool 4 with a shank 5. Moreover, the gearbox is made planetary with a carrier 6 installed in the sleeve 3 with the possibility of longitudinal movement by the shank 5 of tool 4 when switching gears 7-9 gearbox. In addition, there are springs 10 and 11, shank pin 12 and groove 13 of the sleeve.

The device works as follows.

The pin 12, located at a certain distance from the end of the shank 5 of the tool 4, is installed in the groove 13 of the sleeve 3.

When installing a large-diameter tool 4 with a short shank 5, the carrier 6 is in the initial position (Fig. 1). In this case, the rotation is transmitted to the carrier with the tool through the first stage 7 of the gearbox 2, which has the lowest transmission ratio. Tool0

The cops (cutters) of medium diameter have a greater length of the shank 5. When the tool is installed in the device, the carrier 6 moves in the axial direction. In this position of the carrier (Fig. 2), the rotational transmission is carried out through the second stage having an average gear ratio. Tools of small diameters have an even greater length of the shank 5. When installed in the device, the carrier 6 occupies the position (Fig. 3) in which the rotational transmission is carried out through the third stage, which has the highest gear ratio. When tool 4 is removed, the carrier 6 returns to its original position by means of springs 10 and 11.

The use of the proposed device reduces the invasiveness of processing capacity and shortens the time of the operation by automatically switching the rotation frequency of the cutting tool.

0 shank depending on the diameter of the tool.

Claims (1)

Invention Formula 5 A bone processing apparatus comprising a housing with a multi-stage gearbox, an actuator and an output sleeve with a cutting tool with a shank, characterized in that, in order to shorten the time and reduce the morbidity of the operation, The gearbox is made planetary with the carrier mounted in the hub with the possibility of longitudinal movement by the tool shank when shifting gearbox steps. § In //////. At ///// At jigsaw Vida fpl / g.