An electric chain saw assembly comprises a saw chain and a guide plate, the saw chain is arranged around an edge of the guide plate, and the saw chain comprises transmission chain pieces and connecting pieces which are sequentially and rotatably connected end to end; a top end of the transmission chain piece is are provided with a tooth cutting structure; and the tooth cutting structure comprises a cutting edge and a limiting tooth, the limiting tooth is located at a front end of the saw chain in a forward direction, the cutting edge is located at a rear end of the saw chain in the forward direction, and a chipping groove is arranged between the cutting edge and the limiting tooth. The electric chain saw assembly, has simple structure, is convenient to assemble and solves the problem that blades are bent or deviated due to resonance can be effectively.

An electric working machine may include: a support rod constituted of metal; a tool disposed at a front end of the support rod; a motor configured to drive the tool; a control unit disposed at a rear end of the support rod and configured to control the motor; and a heat transfer structure configured to transfer heat from the control unit to the support rod.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A system for protecting an operator (110) of a power tool may include a first set of wearable sensors (120) worn by the operator (110), a second set of wearable sensors (130) worn by the operator (110), a first tool sensor (122) disposed at the power tool where the first tool sensor (122) is configured to communicate with the first set of wearable sensors (120), a second tool sensor disposed (132) at the power tool where the second tool sensor (132) is configured to communicate with the second set of wearable sensors (130), and a controller (140). The controller (140) may be configured to determine, based on distances between the first tool sensor (122) and the first set of wearable sensors (120) and between the second tool sensor (132) and the second set of wearable sensors (130), whether to initiate a protective action with respect to the power tool.

A guide bar for motor chainsaws has side plates and a middle section between the side plates connected fixedly and non-movably to the side plates. The side plates form a clamping section and a deflection section opposite the clamping section. A guide groove extends circumferentially about the guide bar. The middle section forms the guide groove bottom in the deflection section. A guide bar tip is located where the longitudinal center axis of the guide bar intersects the deflection section. The side plates each have a guide surface extending continuously across a first longitudinal side of the guide bar, the deflection section, and a second longitudinal side of the guide bar. The guide surfaces of the side plates have hardened regions at the first and second longitudinal sides and at the guide bar tip with a hardness greater than a hardness of a middle region of the side plates.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A one-hand chainsaw includes a housing, a cutting device, and a battery coupling portion. The housing includes a main housing portion and a handle. The main housing portion is provided with a motor. The handle is disposed along a first straight line, the cutting device is disposed along a second straight line, an end of the cutting device is drivingly connected to the main housing portion, and the cutting device is driven by the motor to work and id formed by a guide plate and a saw chain disposed around the guide plate. The battery coupling portion extends along a third straight line from the main housing portion and is disposed below the handle. The battery coupling portion is configured to connect a battery pack.

A method for operating a saw assembly as well as a saw assembly, having a chainsaw (1) with a circulating saw chain (2) and a chain drive sprocket (3) for driving the saw chain (2). The chainsaw (1) is secured to a moving device (8) via a chainsaw swivel device (19). The moving device (8) has a first operating mode, in which the chainsaw (1) is moved or movable from a first position through a saw area (9) and through the cutting material (18) into a second position, and the moving device (8) has a second operating mode, in which the chainsaw (1) is moved or movable from the second position back through the saw area (9) and through the cutting material (18) into the first position.

A method for operating a saw assembly as well as a saw assembly, having a chainsaw (1) with a circulating saw chain (2) and a chain drive sprocket (3) for driving the saw chain (2). The chainsaw (1) is secured to a moving device (8) via a chainsaw swivel device (19). The moving device (8) has a first operating mode, in which the chainsaw (1) is moved or movable from a first position through a saw area (9) and through the cutting material (18) into a second position, and the moving device (8) has a second operating mode, in which the chainsaw (1) is moved or movable from the second position back through the saw area (9) and through the cutting material (18) into the first position.