摘要:
A chain saw includes a guide bar (1) for a saw chain, a housing (3), a sprocket wheel cover (4), and at least one stud (5) fixed on the housing (3) for threadably fastening the sprocket wheel cover (4) and the guide bar (1). The free thread end (7) of the stud (5) has a maximum usable screw-in depth (tmax) for a nut (6) to be screwed thereon. A stop (9) for the sprocket wheel cover (4) having a stop surface (10) as well as a support surface (11) for contact engaging the stop surface (10) are provided. In the mounted state of the guide bar (1), a distance (a) remains between the stop surface (10) and the support surface (11). The support surface (11) contact engages the stop surface (10) of the stop (9) when the guide bar (1) is removed and the nut (6) is tightened and the nut (6) is screwed onto the studs (5) with a stop screw-in depth. The stop (9) is configured in such a manner that the maximum usable screw-in depth (tmax) is greater than the stop screw-in depth.
摘要:
The invention relates to a motor-driven chain saw having a motor mounted in a housing for driving a saw chain on a guide bar. The guide bar extends forwardly in the longitudinal direction of the chain saw from a forward housing end face. The housing is held by a grab handle for holding and guiding the chain saw. The handle has an upper segment projecting over the housing transversely to the longitudinal center axis of the guide bar. The upper segment extends at one end with a transition segment into a lateral segment lying approximately parallel to the plane of the guide bar and next to the housing. The cross section of the upper segment and the cross section of the lateral segment are configured in a shape which departs from the circular shape and are approximately the same. This affords an ergonomically advantageous hold and increases the operational safety. The major cross-sectional axis of the lateral segment lies approximately perpendicularly to the plane of the guide bar and the same cross-sectional axis in the upper segment lies at an angle of less than 90.degree. to a reference plane which extends at right angles in the longitudinal center axis of the guide bar at right angles to the plane of the guide bar.
摘要:
A manually guided implement having an engine housing and a handle housing that are interconnected by anti-vibration elements. The handle housing is provided with a longitudinal support having, relative to a conventional operating position of the implement, a front end face that is disposed transverse to a longitudinal axis of the longitudinal support. A securement end of a front tubular handle rests against and is secured to the front end face of the longitudinal support.
摘要:
A portable handheld work apparatus has an internal combustion engine (5) having a cylinder (8) and a crankcase (13). The cylinder (8) has an opening (19) for exhaust gases whereat an exhaust-gas muffler (14) is mounted. The exhaust-gas muffler (14) is mounted on the cylinder (8) at least at one attachment location (40, 41) and at least a further attachment location (42) on the internal combustion engine (5). A reduced weight of the work apparatus and a low mechanical load of the exhaust-gas muffler (14) can be achieved when the exhaust-gas muffler is fixed at at least one of the attachment locations (42) via a connection which permits a limited relative movement between the exhaust-gas muffler (14) and the internal combustion engine (5) in at least one direction.
摘要:
The invention is directed to the handle of a portable handheld tool such as a motor-driven chain saw. The handle is configured as a plastic body homogeneous with its bearing portions. The handle is for the most part hollow and can be configured as a unit to include further functional portions such as recesses for vibration attenuators, air guide portions and the like. The plastic handle is especially suited for portable handheld motor-driven chain saws.
摘要:
A chain saw includes a guide bar for a saw chain, a housing, a sprocket wheel cover, and a stud fixed on the housing for threadably fastening the sprocket wheel cover and the guide bar. The free thread end of the stud has a maximum usable screw-in depth (tmax) for a nut. A stop for the sprocket wheel cover having a stop surface as well as a support surface for contact engaging the stop surface are provided. In the mounted state of the guide bar, a distance (a) remains between the stop surface and the support surface. The support surface contact engages the stop surface when the guide bar is removed and the nut is tightened and screwed onto the studs to a stop screw-in depth. The stop is configured in such a manner that the maximum usable screw-in depth (tmax) is greater than the stop screw-in depth.
摘要:
An implement having a drive motor and a tool is provided. A drive shaft is mounted in a guide tube and interconnects the drive motor and tool for rotatingly driving the tool. The drive shaft includes a main member in the form of a hollow shaft having ends on which are disposed respective extensions that form a coupling connection for a positive engagement with coupling components of the drive motor and of the tool.
摘要:
An arrangement for securing a component on a bolt is provided, wherein a shaft of the bolt extends through an opening of the component. A ring is disposed on the shaft, and is secured against axial displacement on a surface of the shaft. The ring has at least one radially extending widened portion that inter-engages an edge of the opening of the component.
摘要:
An arrangement introduces a metered volume of gas into a cavity filled with a melt of plastic. The cavity is defined by an injection mold for producing a hollow plastic body and the injection mold has an injection channel for introducing the molten plastic into the cavity. The arrangement includes a gas-injection nozzle assembly having a housing mounted in the mold and a member displaceably mounted in the housing so as to be movable between a first position and a second position located in spaced relationship to the injection channel. The housing and the member conjointly define a forward end portion of a nozzle assembly facing into the cavity at a region of the cavity spaced from the injection channel. A conducting channel in the forward end portion conducts the gas into the cavity when the member is in the second position. The conducting channel defines a gas-discharge opening for discharging the gas into the cavity. The gas-discharge opening is freely projected approximately into the center of the region at which the nozzle assembly is located to thereby discharge the gas when the member is in the second position thereof and while the melt is injected into the cavity.
摘要:
A threaded closure is provided with a receiving opening 16 in the part thereof which projects into a fuel tank. The end of a limp connecting part 13 is rotatably mounted in this recess and is however axially fixed. The threaded closure prevents damage to the sealing surface and prevents the threaded closure from becoming separated from the fuel tank so that it cannot be lost.