[특허]Work device

Andreas Stihl AG & Co. KG

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Work device

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B27B-017/14 B27B-017/02
출원번호	US-0513997 (2015-09-12)
등록번호	US-10144146 (2018-12-04)
우선권정보	DE-10 2014 014 275 (2014-09-26)
국제출원번호	PCT/EP2015/001833 (2015-09-12)
국제공개번호	WO2016/045773 (2016-03-31)
발명자 / 주소	Frey, Benjamin Zimmermann, Helmut Uhl, Klaus-Martin
출원인 / 주소	Andreas Stihl AG & Co. KG
대리인 / 주소	Huckett, Gudrun E.
인용정보	피인용 횟수 : 0 인용 특허 : 4

초록
▼

The invention relates to a work device with a guide rail (4) on which a chain (5) is driven in a circulating manner. The work device has a clamping device (15) for the chain (5). The clamping device (15) has a clamping element (16) which acts on en the guide rail (4) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The clamping device (15) has a rotatably mounted adjusting element (17) which is connected to the clamping element (16) via a threaded connection (20). A rotation of the adjusting element (17) about its rotational axis (21) causes a movement of the clamping element (16) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The outer circumference of the adjusting element (17) has a threaded portion (22) with at least one turn (23), said threaded portion being provided for engaging with at least one threaded portion (24) of the clamping element (16). The adjusting element (17) has an actuating contour (39) so that a user can rotate the adjusting element (17), said actuating contour comprising at least one depression. The largest spacing (b) between the threaded portion (22) of the adjusting element (17) and the rotational axis (21) is at least as large as the largest spacing (a) between the actuating contour (39) and the rotational axis (21).

대표
청구항
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1. A work device comprising: a guide bar having a longitudinal center axis;a chain driven in circulation about the guide bar;a tensioning device comprising a tensioning member acting on the guide bar in a direction of the longitudinal center axis to tension the chain;the tensioning device further comprising a rotatably supported adjusting member;the tensioning member comprising at least one threaded section;the adjusting member comprising a threaded section on an outer circumference of the adjusting member, the threaded section of the adjusting member comprising at least one thread turn engaging the at least one threaded section of the tensioning member to form a threaded connection between the adjusting member and the tensioning member, wherein turning of the adjusting member about an axis of rotation of the adjusting member effects a movement of the tensioning member in the direction of the longitudinal center axis of the guide bar;the adjusting member comprising an actuating contour that comprises at least one recess enabling an operator to act on and turn the adjusting member;the threaded section of the adjusting member comprising a first greatest spacing relative to the axis of rotation and the actuating contour comprising a second greatest spacing relative to the axis of rotation, wherein the first greatest spacing is at least as great as the second greatest spacing;a chain sprocket cover that comprises an opening, wherein the adjusting member projects at least partially through the opening to an exterior side of the chain sprocket cover so that an operator can turn the adjusting member through the actuating contour from the exterior side. 2. The work device according to claim 1, wherein the at least one recess of the actuating contour at least partially interrupts the at least one thread turn of the threaded section of the adjusting member. 3. The work device according to claim 1, wherein the actuating contour extends across a length section of the adjusting member and wherein the threaded section of the adjusting member extends across an entire length of said length section. 4. The work device according to claim 3, wherein the adjusting member comprises a base member with a cylindrical outer surface and wherein the actuating contour and the threaded section of the adjusting member extend across an entire axial length of the base member, respectively. 5. The work device according to claim 1, wherein the actuating contour is formed by at least one groove. 6. The work device according to claim 5, wherein a length direction of the groove of the actuating contour extends at an angle of at most approximately 40° relative to the axis of rotation of the adjusting member. 7. The work device according to claim 5, wherein the groove has flanks and the flanks of the groove, in a section plane perpendicular to the axis of rotation of the adjusting member, are positioned at an angle relative to each other that amounts to approximately 60° to approximately 120°. 8. The work device according to claim 1, wherein the adjusting member is rotatably supported in a direction of the axis of rotation on the chain sprocket cover. 9. The work device according to claim 8, wherein a base member of the adjusting member projects at least partially through the opening of the chain sprocket cover to the exterior side of the chain sprocket cover. 10. The work device according to claim 9, wherein the chain sprocket cover comprises a grip depression disposed on at least one side of the opening, wherein the at least one side of the opening extends parallel to the axis of rotation of the adjusting member. 11. The work device according to claim 8, wherein the adjusting member comprises bearing pins arranged on opposite end faces of the adjusting member, wherein the chain sprocket cover comprises receptacles, and wherein the bearing pins are held in the receptacles of the chain sprocket cover. 12. The work device according to claim 8, further comprising a housing and an actuating element securing the chain sprocket cover on the housing, wherein the actuating element is arranged adjacent to the tensioning device on the chain sprocket cover. 13. The work device according to claim 12, wherein the tensioning member is disk-shaped and comprises a flat side, wherein the at least one threaded section of the tensioning member is arranged on the flat side, wherein the at least one threaded section of the tensioning member is formed by partial sections of neighboring thread turns, and wherein the flat side comprises a step extending transversely to the longitudinal center axis of the guide bar, wherein a thickness of the tensioning member is reduced at a side of the step facing the actuating element. 14. The work device according to claim 1, wherein an outer diameter of the adjusting member amounts to at least 15 mm. 15. The work device according to claim 1, wherein the tensioning member comprises at least one pin that engages an opening of the guide bar and that connects the tensioning member with form fit with the guide bar in a direction of the longitudinal center axis of the guide bar. 16. The work device according to claim 1, wherein threads of the threaded connection formed by the threaded section of the adjusting member and the at least one threaded section of the tensioning member are trapezoidal threads, wherein a flank angle of the trapezoidal threads amounts to from 0° to 60°. 17. The work device according to claim 1, wherein the threaded section of the adjusting member and the at least one threaded section of the tensioning member are comprised of plastic material. 18. The work device according to claim 1, wherein the at least one recess is a groove. 19. The work device according to claim 1, wherein the adjusting member is comprised of plastic material.

이 특허에 인용된 특허 (4)

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특허 상세정보

Work device

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이 특허에 인용된 특허 (4)

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Work device

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이 특허에 인용된 특허 (4)

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상세정보조회

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IPC 상세정보(version : 201201)

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