A remote controlled actuator includes an elongated spindle guide section (3), a distal end member (2) fitted to the distal end thereof for alteration in attitude, and a drive unit housing (4a) connected with a base end of the spindle guide section (3). The distal end member (2) rotatably support a s
A remote controlled actuator includes an elongated spindle guide section (3), a distal end member (2) fitted to the distal end thereof for alteration in attitude, and a drive unit housing (4a) connected with a base end of the spindle guide section (3). The distal end member (2) rotatably support a spindle (13) holding a tool (1). The spindle guide section (3) includes a rotary shaft (22) for transmitting a rotation of the spindle (13) and an attitude altering member (31) for altering the attitude of the distal end member (2) both within an outer shell pipe (25) forming an outer shell. The attitude altering member (31) is reciprocally movably inserted in a guide pipe (30) within the outer shell pipe (25). A guide pipe restraining unit (50) is provided for restraining the guide pipe (30) from moving within the outer shell pipe (25).
대표청구항▼
1. A remote controlled actuator which comprises a spindle guide section of an elongated configuration, a distal end member fitted to a tip end of the spindle guide section through a distal end member connecting unit for alteration in attitude, and a drive unit housing to which a base end of the spin
1. A remote controlled actuator which comprises a spindle guide section of an elongated configuration, a distal end member fitted to a tip end of the spindle guide section through a distal end member connecting unit for alteration in attitude, and a drive unit housing to which a base end of the spindle guide section is connected; in which the distal end member rotatably supports a spindle for holding a tool;in which the spindle guide section includes a rotary shaft for transmitting rotation of a tool rotating drive source, provided within the drive unit housing, to the spindle, a guide hole so as to extend to opposite ends thereof, and an attitude altering member reciprocally movably inserted within the guide hole for altering the attitude of the distal end member;in which the attitude altering member is, while a tip end thereof is held in contact with the distal end member, selectively advanced or retracted one at a time;in which an attitude altering drive source for selectively advancing or retracting the attitude altering member is provided within the drive unit housing; andfurther comprising an outer shell pipe defining an outer shell for the spindle guide section, a guide pipe positioned within the outer shell pipe having an inner diametric hole defining the guide hole, and a guide pipe restraining unit for restraining the guide pipe from moving within the outer shell pipe. 2. The remote controlled actuator as claimed in claim 1, in which the guide pipe restraining unit is operable to urge the guide pipe against an inner diametric surface of the outer shell pipe. 3. The remote controlled actuator as claimed in claim 2, further comprising a rotary shaft support member for rotatably supporting the rotary shaft and in which the guide pipe restraining unit is operable to urge the guide pipe against the inner diametric surface of the outer shell pipe by adjusting at least one or more of an inner diametric dimension of the outer shell pipe, an outer diametric dimension of the guide pipe and an outer diametric dimension of the rotary shaft support member. 4. The remote controlled actuator as claimed in claim 2, in which the rotary shaft is positioned at a center of the outer shell pipe, in which a plurality of the guide pipe or at least one guide pipe and an arbitrarily chosen number of identical outer diametric members each having an outer diameter, which is the same as that of the guide pipe, are arranged in a circumferential direction in a juxtaposed fashion relative to each other, andin which, when an inner diametric dimension of the outer shell pipe is expressed by D1, an outer diametric dimension of the identical outer diametric member and the guide pipe is expressed by D2, and an outer diametric dimension of the rotary shaft support member is expressed by D3, such a relationship as D1≦D2×2+D3 establishes. 5. The remote controlled actuator as claimed in claim 1, further comprising a plurality of rotary shaft support members for rotatably supporting the rotary shaft and in which the guide pipe restraining unit includes a guide pipe contact member provided between at least one set of the neighboring rotary shaft support members to contact the guide pipe. 6. The remote controlled actuator as claimed in claim 5, in which the guide pipe contact member functions to urge the guide pipe against an inner diametric surface of the outer shell pipe. 7. The remote controlled actuator as claimed in claim 5, in which each of the rotary shaft support members is a rolling bearing and further comprising a spring element provided between the neighboring rolling bearings for applying a preload to the neighboring rolling bearings andin which the guide pipe contact member is provided at an axial location where the spring element is disposed on a side of an inner ring of each of the rolling bearings. 8. The remote controlled actuator as claimed in claim 1, further comprising a rotary shaft support member for rotatably supporting the rotary shaft within the spindle guide section, and a fixing and supporting member for supporting the rotary shaft support member in a fixed condition, and in which the guide pipe restraining unit comprises a gap adjusting member for adjusting a gap dimension between the rotary shaft support member and the fixing and supporting member. 9. The remote controlled actuator as claimed in claim 8, in which the gap adjusting member comprises an elastic member provided on an outer periphery of the rotary shaft support member. 10. The remote controlled actuator as claimed in claim 9, in which the rotary shaft support member is a rolling bearing including an outer ring having an outer diametric surface provided with one or more annular groove and in which the elastic member as the gap adjusting member comprises an O-ring engaged in the annular groove. 11. The remote controlled actuator as claimed in claim 9, in which the elastic member as the gap adjusting unit is coated on an outer peripheral surface of the rotary shaft support member. 12. The remote controlled actuator as claimed in claim 8, in which the gap dimension is within the range of +100 μm to −10 μm.
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