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US 2015/0089820 A1Published application
Method and guide bar clamping arrangement related to a motor saw
AssigneeJps Teknik AB
InventorsJohn Peter Sorell, Kurt Gunnar Falk
Life of this patent
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AssigneeJps Teknik AB
InventorsJohn Peter Sorell, Kurt Gunnar Falk
Estimating the term…
Method and an arrangement within a motor saw, having a guide bar, a drive motor unit including with its chassis a drive motor, whose rotatable shaft supports a drive disc, around which a portion of an endless saw chain runs, the saw chain also being adapted with its remaining portions to run along and form the guide bar arrangement with its guide bar and along tracks allotted to side edges directed away from each other. An anchored support plate, a displaceable clamping plate and with an interrelated arrangement in an inactivated position, the end area of the guide bar within a first mode displaces the end area in a direction perpendicular from the plane and from the support plate, and within a second mode displacing the end area and its guide bar in a direction along the plane allotted to the guide bar and out of the inactivated interrelated arrangement.
A method in a motor saw in the form of a motor saw arrangement (“A”) having a guide bar arrangement (2) adapted to a drive motor unit (1) of said motor saw, with said drive motor unit (1) comprising with its chassis (1a) a drive motor (3), the rotatable shaft (3a) thereof is adapted to support a drive disc (4), such as a toothwheel (4a) shaped around the periphery (4″) thereof, around which a portion (5a) of an endless saw chain (5) is adapted to run, said saw chain (5) also being adapted with its remaining portions to run along and to form said guide bar arrangement (2) with its guide bar (21) and along tracks (2a′, 2b′) allotted to side edges directed away from each other and a relinking disc (2c) driven by the translation motion of the saw chain and allotted to the outer end area (2c′) of the guide bar (21), said relinking disc (2c) being a toothwheel (2c″) or the like, and the motor saw arrangement (“A”) with its drive motor unit (1) being adapted to support the guide bar arrangement (2) over an arrangement (7) adapted for clamping the inner end area (2d) facing the chassis of the guide bar (21), such as a clamping arrangement (7, 71), said arrangement (7) being adapted to be able to take an activable position in which the chassis (1a) included in the drive motor unit (1) becomes fixedly anchored related to the guide bar arrangement (2) and its guide bar (21) or an inactivable position in which the chassis (1a) of the drive motor unit (1) is loosely or freely related to the guide bar arrangement (2) and its guide bar (21) and in this inactivated position, by a relative motion in a direction from the drive motor unit (1) and its chassis (1a), is released from the drive motor unit and its chassis, said guide bar indicating in the mentioned inactivated position an action pattern for moving the guide bar (21) from the chassis (1a), wherein said arrangement (7) can be brought to an inactivable position by loosening a clamping means (7c) and in this inactivating position of the arrangement and clamping means releasing said saw chain (5) from the guide bar (21) and its relinking disc (2c) and displacing the guide bar (21) and its end portion (2d) facing the drive motor along a plane (“P) disposed through said away-directed side edges of the guide bar oriented or related plane (“P”) and out of the inactivated position of the clamping arrangement (7), characterized in that from a clamping position of the guide bar to a released position of the guide bar said arrangement is structured as an interrelated arrangement (7, 71) allotted a fixed support plate (7a) and a displaceable clamping plate (7b) linked or interrelated together with a clamping means (7c) in an activated position in known manner, the end area (2d) of an intermediately lying guide bar is clamped wherein the interrelated arrangement and in an inactivated position the guide bar is adapted from a freely lying clamping plate (7b) to be brought to an inactivable position by over the clamping means (7c) loosening the clamping plate (7b) and/or the end area (2d) and within a first mode of motion displacing the end area (2d) in a direction at right angles from said plane (“P”) and at right angles from the support plate (7a) and within a second mode of motion, immediately following the first mode of motion, displacing said end area (2d) and its guide bar (21) in a direction along said plane (“P”) allotted to the guide bar and out of the inactivated interrelated arrangement (7).
An arrangement of a motor saw and an adapted guide bar arrangement (2) for a motor saw arrangement (“A”), wherein said drive motor unit (1) with its chassis (1a) comprises a drive motor unit (3), the rotatable shaft (3a) of which is adapted to carry a drive disc (4), such as a toothwheel (4a) shaped around the periphery (4″), around which toothwheel a portion (5a) of an endless saw chain (5) is adapted to run and which saw chain (5) also is adapted with its remaining portions to run along said guide bar arrangement (2) and its guide bar (21) and along side edges directed away from each other and its allotted tracks (2a′, 2b′) and to the outer end area (2c′) of the guide bar (21) allotted, by the translation motion of the saw chain, a driven relinking disc, such as a toothwheel or similar, and wherein the motor saw arrangement (“A”) with its drive motor unit (1) is adapted to support said guide bar arrangement (2) over an arrangement (7) adapted for clamping the inner end area (2d) facing the chassis (a) of the guide bar (21), such as a clamping arrangement (7), said arrangement (7) being adapted to be able to take an activable position wherein the chassis (1a) included in the drive motor unit becomes solely and fixedly anchored related to the guide bar arrangement (2) and its guide bar (21) or an inactivable position in which the chassis (1a) of the drive motor unit (1) is loose and freely related to the guide bar arrangement and its guide bar (21) and in this inactivated position, by a relative mo-tion or displacement in a direction from the drive motor unit (1) and its chassis (1a), releases from the drive motor unit (1) and its chassis (a) said guide bar and during the mentioned inactivating position indicates a pattern of action i.a. for removing the guide bar from the chassis, wherein said arrangement can be brought to said inactivable position by loosening a clamping means (7c) and during this inactivated position of the arrangement loosening said saw chain (5) from the guide bar (21) and its relinking disc (2c) and displacing the end portion (2d) of the guide bar and its drive motor facing end portion (2d) along the guide bar allotted, through away-directed side edges of the guide bar oriented plane (“P”) and out of the inactivated position of the arrangement (7), characterized in that from a clamping position for said guide bar arrangement and to a free position thereof said clamping arrangement is formed as an interrelated arrangement (71), that said arrangement is allotted a fixed support plate and a displaceable clamping plate (7b) coordinated with the support plate for clamping with said clamping means (7c) the inner end portion (2d) of an intermediately positioned guide bar, wherein the interrelated arrangement (71) is adapted to be brought to an inactivable position for letting the clamping plate be released by loosening the clamping means (7c) and the clamping plate (7b) and/or the end area (2d) for in a first mode of motion being displaceable at right angles a small distance (“e”) in a direction from said support plate (7a) and within a second mode of motion immediately following the first mode of motion letting said end area (2d) and guide bar (21) be brought or displaced along said plane (“P”) allotted to the guide bar and out of the inactivated interrelated arrangement (7).
Dependencies are inferred from the claim text.