Driving unit for pressure application shaft in a welding appratus

Abstract

Since components constituting a driving unit for pressure application shaft are integrally assembled with one another, and the driving unit for pressure application shaft is integrally fixed to a housing body, the precious driving unit for pressure application shaft can be obtained with ease, and consequently, it is possible to provide the precious driving unit for pressure application shaft in a welding apparatus at low cost. The driving unit for pressure application shaft in a welding apparatus includes a housing for housing therein a ball screw mechanism for converting rotation of an output shaft of a motor into reciprocating motion of a pressure application shaft, and a direct acting type rolling guide mechanism provided between a pressure application shaft member and the housing, characterized in that the housing comprises a housing body which is opened at one side in a substantially U-shape in cross section, and a plate for covering the opened portion, and pressure application mechanism members comprise the ball screw mechanism, the pressure application shaft member, the direct acting type rolling bearing which is fixed to the pressure application shaft member, and a rail combined with the direct acting type rolling bearing, and wherein the pressure application mechanism members are fixed to the housing body, and the plate is fixed to the opened portion of the housing body.

Dependencies are inferred from the claim text.