Thiết kế và chế tạo mẫu khung cố định ngoài hexapod

NGHIEN ciiu-TRAO DOI

THI^T K i VA CHi TAO MA U KHUNG C6 DINH

NGOAI HEXAPOD

DESIGN AND PROTOTYPE MANUFACTURING

OF HEXAPOD EXTERNAL FIXATOR

Tran Nguyen Duy Phfldng, Le Sy Ldc

Khoa Cd khi, TrUdng Dai hpc Bach Khoa TR Hd Chi Minh

TOM TAT

Bdi bdo di xudt mgt phUdng dn thiit ki mdi ciia khung co dinh ngodi. Thiit ke ndy tan dung

nhiing Uu diem cua cd cdu Stewart-Gough la cho phep tao ra vt tri khong gian bdt ky cUa mgt vat the

thong qua viec thay doichieu ddi cdcchdn trong cd cdu. Trong thiit kindy, cdc tdc gid gidi thieu phUdng

dn thay doi chiiu ddi cdc chdn bang cd cdu ong ren-thanh trUdt vd phUdng dn co dinh chiiu ddi cdc

chdn bang cdcdai 6c vd chot ngang.Bdi bdo cUng di cap den vdn di hdp ly hoa hinh hgc mgt so chi tiet

cua khung nhdm gidm trgng lUdng khung.

Tfl khda: Khung co dinh ngodi, hexapod, chdn thiidng chinh hinh.

ABSTRACT

This paper proposes a new design of the external fixator usinghexapod mechanism. The design

take the advantage of Stewart-Gough mechanism which is consists of two rings or partial ringsconnected

by six telescopic struts at special ball joints. In this proposed mechanism, the authors come up with

plan that the length of the struts are adjusted by the movement of cylindrical bar in external threaded

pipe and fixed by pair of nuts. The article abo the rationalization of some parts geometry to reduce the

weight of the frame.

Keywords: Fixator, hexapod, injury, orthopedic.

ISSN 0866 - 7056

TAP CHf CO KHI VIET NAM, Sd 4 nam 2016

www.cokhivietnam.vn