초록

A wok support for use in a wok range incorporates a refractory insulating material into its structure. The wok support includes a tubular support structure having internal space in its wall. The refractory insulating material is disposed in the internal space.

대표청구항 ▼

A wok support for use in a wok range incorporates a refractory insulating material into its structure. The wok support includes a tubular support structure having internal space in its wall. The refractory insulating material is disposed in the internal space. 1. A driving unit for a welding apparat

A wok support for use in a wok range incorporates a refractory insulating material into its structure. The wok support includes a tubular support structure having internal space in its wall. The refractory insulating material is disposed in the internal space. 1. A driving unit for a welding apparatus, said driving unit comprising: a pressure application shaft; a ball screw assembly for converting rotation of an output shaft of a motor to reciprocating motion of said pressure application shaft; a rolling guide arrangement provided between a portion of said pressure application shaft and a housing of said driving unit, said guide arrangement including an elongate rail fixed to said housing and a bearing fixed to said portion of said pressure application shaft and rollingly engaged with said rail, said ball screw assembly, said pressure application shaft, and said guide arrangement being secured to and disposed within said housing; and said housing having a transverse cross-sectional configuration which is U-shaped and opens downwardly such that a lower portion of said housing defines a bottom opening, said driving unit further including a plate fixed to said lower portion of said housing so as to close off said bottom opening, said plate being a separate component from said housing and removably attached thereto to permit installation of said ball screw assembly, said pressure application shaft and said guide arrangement as a preassembled unit within said housing through said bottom opening. 2. The driving unit of claim 1, wherein said housing opens frontwardly and is closed off at a front end thereof by a front wall, said front wall defining a hole therein through which said pressure application shaft extends, and no bearing for said pressure application shaft is provided in said hole. 3. The driving unit of claim 1 wherein a rear end of a fixed arm is fixed to said housing. 4. The driving unit of claim 1 wherein said housing comprises an extrusion molded member constructed of aluminum alloy. 5. The driving unit of claim 1 wherein said ball screw assembly includes a rotatable screw shaft, and a machining portion for permitting manual rotation of said screw shaft is disposed at a rear end of said screw shaft. 6. The driving unit of claim 1 wherein said U-shaped configuration of said housing is defined by a pair of generally parallel and laterally spaced side walls and a top wall which extends transversely therebetween, said side and top walls being integrally formed with one another and together defining a one-piece extruded component. 7. The driving unit of claim 6 wherein a front portion of said housing is closed off by a front plate, said front plate defining therein a bearingless opening through which said pressure application shaft projects. 8. The driving unit of claim 7 wherein said rail is fixed to a lower surface of said top wall of said housing. 9. The driving unit of claim 8 wherein said bearing has an upwardly opening U-shape in transverse cross-section so as to define an upwardly opening recess therein in which said rail is engaged. 10. The driving unit of claim 9 wherein said ball screw assembly includes a screw shaft rotatably mounted within said housing and a ball nut engaged with said screw shaft and fixed to said pressure application shaft, said screw shaft being supported at a rear end thereof by a rear bearing. 11. The driving unit of claim 10 wherein said screw shaft mounts a first pulley on said rear end thereof, and said driving unit further includes a motor including an output shaft mounting a second pulley on one end thereof, and a belt which extends between said first and second pulleys so as to drivingly interconnect said screw shaft to said motor. 12. The driving unit of claim 10 wherein said rear end of said screw shaft is configured for permitting manual rotation of said screw shaft. 13. The driving unit of claim 1 wherein said U-shaped configuration of said housing is defined by a pair of laterally spaced side walls and a top wall which extends transversely therebetween, said side and top walls together defining a one-piece component, and said plate being a separate component from said housing. 14. A method of assembling a welding apparatus, sai