805results about "Chain saws" patented technology

The present disclosure relates to a battery-powered chainsaw (1) comprising a cutting tool in the form of a saw chain (4) running on a guide bar, a front handle (7) at least partially extending transverse to the elongation of the guide bar and a rear handle (5) extending, at least partially, approximately in the elongated direction of the guide bar. A battery-operated heating unit comprising a first heating element (15) in the rear handle, a second heating element (13) in the front handle, and a temperature sensor (17) located in either of the rear or front handle. The heating unit (19) is configured to provide power to the first and second heating element based on a reading from the temperature sensor (17). Upon activation, a temporary power boost is provided to the first and second heating elements and subsequently a steady state power, lower than the power of the power boost.

Systems and methods which provide control of lubricant delivery with respect to chainsaws using a lubricant flow shutoff valve controlled in correspondence to an operational state of the chainsaw. A chainsaw lubricant delivery control system includes a lubricant flow shutoff valve and a chainsaw operation-based valve controller operable cooperatively to provide control of lubricant delivery to the cutting chain and guide bar assembly of a chainsaw. The chainsaw operation-based valve controller is coupled to an operationally active element of the chainsaw wherein the chainsaw operation-based valve controller may control the lubricant flow shutoff valve between an open position and a closed position responsive to detecting a particular state of the operationally active element corresponding to an operational state of the chainsaw.

A job-site tool in one aspect of the present disclosure includes: a display; a flexible printed circuit; and a control circuit. The display is visible tool from outside and includes at least one surface light emitter. The flexible printed circuit includes conductive traces. The at least one surface light emitter is on the flexible printed circuit and is electrically connected to the conductive traces. The control circuit is electrically connected to the display via the conductive traces.

A chainsaw includes a housing with a body portion and a motor portion disposed on a left or right side of the body portion, a guide plate, a chain, a drive assembly including an electric motor, a power supply device, a top handle, a side handle and a circuit board assembly. The top handle is disposed on and connected to an upper side of the body portion, and the rear portion is located below a handle rear end of the top handle. The side handle is disposed on a same side of the body portion together with the motor portion. The circuit board assembly is disposed in the rear portion of the body portion, and located between the power supply device and the drive assembly in a front and rear direction. An overall length of the chainsaw is smaller than or equal to 230 mm.

A chainsaw including: a housing; a motor supported by the housing, the motor comprising an output shaft; a guide bar, the guide bar defining a cutting track; a cutting implement guided by the cutting track and driven about the guide bar by rotation of the output shaft; a tension adjusting system for adjusting tension in the cutting implement by displacing the guide bar towards or away from the housing, the tension adjusting system comprising a user actuatable interface accessible from an exterior of the housing, wherein the user actuatable interface is a bistable movable between a first position and a second position, wherein the tension adjusting system tensions the cutting implement to a cutting tension when the user actuatable interface is in the first position, and wherein the tension adjusting system tensions the cutting implement to a relaxed tension when the user actuatable interface is in the second position.

A work apparatus includes a tool, a drive motor for driving the tool, at least one handle for guiding the work apparatus during operation, at least one electric heater for the handle, an electric energy store which supplies the drive motor and the at least one heater with electric energy, and a control unit which is configured to control the electric power supplied to the at least one heater. It is provided that the work apparatus is configured to provide the maximum electric power made available to the at least one heater as a function of a charging state of the energy store. The control unit only switches the at least one heater on and off, and the heater in the switched-on state is operated directly with the voltage provided by the energy store.

A chainsaw includes a housing and a cutting assembly. The housing includes a central housing, a motor cover arranged obliquely upward at a tail part of the central housing, and a handle housing arranged obliquely downward at the tail part of the central housing, and a hollow structure is arranged between the motor cover and the handle housing. The cutting assembly is arranged on a front side of the central housing, an axis of the cutting assembly is intersected with an axis of the handle housing, and a first intersection thereof is located inside the handle housing.

The invention discloses a saw chain guide plate lubricating system which comprises an integrally-formed guide plate body and is characterized in that a driven supporting structure is arranged at one end of the guide plate body, a rotating structure is installed on the driven supporting structure, and a transmission wheel is installed on the rotating structure; a saw chain guide groove is formed in the side face of the guide plate body. The guide plate body and the driven supporting structure are provided with an oil conveying channel, one end of the oil conveying channel is connected with an oil supply unit of the lumbering equipment, and the other end of the oil conveying channel makes contact with the rotating structure. Through the arrangement of the oil conveying channel, the service life of the driven end rotating structure is prolonged, the part, making contact with a tree, of the saw chain can be lubricated, and meanwhile the utilization rate of lubricating oil can be increased.

An electric work machine with improved workability at high output, configured to cut a work target, is provided. The electric work machine comprises: a working portion configured to cut the work target and a main body including: a housing; a flow path forming portion; a motor; and a control unit, wherein the motor generates rotational power for driving the working portion, the control unit electrically controls rotation of the motor, the flow path forming portion forms an air flow path including a first air flow path and a second air flow path, the first air flow path communicates with an exterior of the housing to allow external air to flow to the motor via the control unit, and the second air flow path communicates with the exterior of the housing so as to allow external air to flow directly to the motor.

The present disclosure relates to a lubrication monitoring system (15) configured to monitor a supply of lubricant in a hand-held cutting tool (1) having a cutting unit (3, 5). A lubricant tank (41) and a conduit (45) are configured to duct a flow of lubricant from the tank (41) to the cutting unit (3, 5). The lubrication monitoring system (15) comprises a heating element (29) and a sensor arrangement (31, 33), the heating element (29) being configured to heat the lubricant flow. The sensor arrangement comprises a first sensor (31) located at the flow, upstream of the heating element (29), and a second sensor (33) located at said flow, downstream of the heating element. The lubrication monitoring system outputs a monitoring signal based on a sensed temperature difference between the first and second sensors (31, 33).

A chainsaw includes a housing formed with or connected to at least a handle for a user to hold; a guide plate configured to support and guide a chain, where an end of the guide plate is supported by the housing; a power supply device including at least one battery pack detachably connected to the housing to provide electrical energy for the chainsaw; and a display device mounted to the housing and configured to display a current state of the chainsaw. The display device has a display plane, and the angle β between the display plane and a bottom plane perpendicular to a guide plate plane is greater than or equal to 25° and less than or equal to 75°.

A lubrication system for a chainsaw, the lubrication system including a reservoir housing a lubricant, a fluid conduit extending between the reservoir and a location adjacent to a chain of the chainsaw, a pump configured to move lubricant from the reservoir to the location adjacent to the chain, and a valve disposed along the fluid conduit. The valve has a lubricant inlet that receives lubricant from the reservoir, an air inlet, and an outlet that provides lubricant to the location adjacent to the chain. The valve is movable between an open position whereby lubricant passes from the lubricant inlet to the outlet and a closed position whereby the outlet is in fluid communication with the air inlet. The valve moves between the open and closed positions in response to a user input.

The disclosure provides a chain saw, which includes: a case; a working component extending out of the case, the working component having a cutting element and a guide plate supporting the cutting element; a power drive device, including a motor positioned in the case, the motor drives the cutting element to move around the guide plate; a switch trigger, arranged on the case and starts the motor; and a lubricating component, arranged in the case and provides oil for the cutting element. The chain saw includes a lock knob capable of locking and releasing the switch trigger. The lubricating component includes an oil bubble arranged in the case and is close to the lock knob. The lock knob compresses the oil bubble to perform an oil discharging operation in a process from locking the switch trigger to releasing the switch trigger. The lubricating component delivers oil to the cutting element.

A portable work apparatus has a housing, a drive motor arranged in the housing, a guide bar with a longitudinal center axis, and a saw chain. The drive motor drives the saw chain in a rotating manner in a guide groove of the guide bar via a drive sprocket. A longitudinal plane of the guide bar is spanned by the guide groove. A discharge opening for discharging chips from the sprocket area into the outside surroundings is formed on the housing. The discharge opening has a first section formed on the first longitudinal side of the chainsaw, and a height measured parallel to the longitudinal plane and perpendicularly to the longitudinal center axis of the guide bar. The height is at least 5 mm.

An apparatus has a tool having a tool plane and a handle. A longitudinal direction runs in the direction from the handle to the tool. An outer housing has an opening for cooling air. An electric motor is disposed in the housing and an air filter disposed on or in the opening. In a resting position on a horizontal plane, the base faces the plane. A cover lies opposite the base. A lateral surface interconnects cover and base. The outer housing, in a lateral view perpendicularly onto the tool plane, possesses a contour which in a projection onto the tool plane in the direction perpendicular to the tool plane delimits an imaginary housing surface. The filter in a projection onto the tool plane in the direction perpendicular to the tool plane possesses an outer contour delimiting an imaginary surface of at least 5% of the imaginary housing surface.

The invention relates to an electric tool which comprises a machine shell and a locking assembly, the machine shell is provided with a battery pack installation part, the battery pack installation part is detachably connected with a battery pack, and the battery pack is configured to provide electric energy for the electric tool; the locking assembly comprises a spring bolt, a spring bolt receiving part and a triggering piece. The spring bolt and the trigger piece are movably arranged on one of the machine shell and the battery pack, and the spring bolt receiving part is arranged on the other one of the machine shell and the battery pack. The spring bolt is jointed with the spring bolt receiving part, so that the battery pack is locked relative to the shell; and the spring bolt is separated from the spring bolt receiving part, so that the battery pack is unlocked relative to the shell. And the electric tool is configured to directly or indirectly drive the spring bolt to move relative to the spring bolt receiving part through at least two different actions generated by the triggering piece when external force is applied to the triggering piece, so that the battery pack is unlocked relative to the shell. The number of the triggering pieces is configured to be at least two.

The utility model relates to the technical field of cutting heads, in particular to a cutting head cutting device which comprises a chain plate, a chain wheel and a saw assembly support, a chain-shaped blade is mounted on the chain wheel and the chain plate, a saw guide seat is assembled on the saw assembly support, and a saw guide plate is slidably arranged on the saw guide seat. The saw guide plate is connected with the chain plate; the saw further comprises a displacement assembly and a locking assembly. The displacement assembly is used for driving the saw guide plate to move so as to adjust the tension degree of the chain-shaped blade. And the locking assembly is used for locking the saw guide plate. The utility model has the advantages that the chain-shaped blade is convenient to tighten, adjust and replace, the reliability is good, and the like.

The invention relates to an electric tool and an unlocking method of a battery pack connected with the electric tool in a matched mode, the electric tool comprises a machine shell and a locking assembly, the machine shell is provided with a battery pack installation part, the battery pack installation part is detachably connected with the battery pack, and the battery pack is configured to provide electric energy for the electric tool; the locking assembly comprises a spring bolt, a spring bolt receiving part and a triggering piece. The spring bolt and the trigger piece are movably arranged on one of the machine shell and the battery pack, and the spring bolt receiving part is arranged on the other one of the machine shell and the battery pack. The spring bolt is jointed with the spring bolt receiving part, so that the battery pack is locked relative to the shell; and the spring bolt is separated from the spring bolt receiving part, so that the battery pack is unlocked relative to the shell. According to the electric tool, external force is applied to the triggering piece, at least two different actions generated by the triggering piece directly or indirectly drive the spring bolt to move relative to the spring bolt receiving part, and unlocking of the battery pack relative to the machine shell is achieved.

The invention relates to an electric starting chain saw, which at least solves the problem that the electric starting mechanism of the existing chain saw on the market is not easy to use, and comprises a chain saw main body, the chain saw main body is provided with a chain saw mechanism and an engine unit for providing power for the chain saw mechanism, and the power output end of the engine unit is in transmission connection with the chain saw mechanism. A magneto-electric starting mechanism is arranged on the chain saw body and comprises an ignition assembly used for igniting the engine unit and a driving motor matched with the ignition assembly.

The utility model provides a double-pack chain saw which comprises a main body shell, a guide plate, a saw chain, an electric motor and a handle, and a first battery pack and a second battery pack are arranged in parallel in the axial direction of forward protruding and extending of the guide plate; the bottoms of the first battery pack and the second battery pack do not protrude out of the bottom of the main body shell; or, the bottoms of the first battery pack and the second battery pack protrude out of the bottom of the main body shell, so that the bottom of the first battery pack and the bottom of the second battery pack jointly form a horizontal supporting part of the chain saw. According to the technical scheme, the first battery pack and the second battery pack are arranged in parallel in the axial direction of forward protruding and extending of the guide plate, so that the layout of the battery packs is more regular and ordered, and operation and use are convenient.

The utility model discloses a chain saw with a quick release function. The chain saw comprises a chain saw main machine and a chain plate assembly, the chain plate assembly is located on the right side of the chain saw main machine, a cover body used for covering the rear end of the chain plate assembly is arranged on the right side of the chain saw main machine, the chain saw main machine is connected with the chain plate assembly through a quick release assembly, and a main driving wheel is arranged on the right end face of the chain saw main machine. A chain saw chain is in power connection between the chain plate assembly and the main driving wheel, the quick release assembly comprises a guide hole formed in the right side of the chain saw main machine, the guide hole is formed in the front-back direction, a sliding block capable of sliding along the guide hole is arranged in the guide hole, and the right end of the sliding block extends out of the guide hole and is connected with the chain plate assembly. A locking assembly and a driving assembly are arranged on the chain saw main machine, the locking assembly is used for locking / unlocking the sliding block, and the driving assembly is used for driving the sliding block to move. The chain saw chain can be rapidly replaced, the replacement efficiency is high, and consumed time is short.

A chainsaw includes a housing; a first motor supported by the housing; a saw chain driven by the first motor to implement a cutting function; a guide bar, where an end of the guide bar is supported by the housing and the guide bar is used for supporting and guiding the saw chain; an oil pump assembly including an oil pump for pumping lubricants to lubricate the saw chain or the guide bar and an oil can for storing the lubricants; and a second motor for driving the oil pump, where the distance between the center of gravity of the first motor and the center of gravity of the second motor is less than or equal to 1 m.

A method is provided for operating a hand-guided processing device that has a rotating and / or circulating cutting tool, an electric motor drive system wherein the electric motor drive system is configured for generating a torque for driving the cutting tool, and a user-operable control element. The method automatically monitors whether a blocking criterion is fulfilled, wherein the blocking criterion is characteristic of a blocking of the cutting tool, and if the blocking criterion is fulfilled and the control element operated, automatically lowers the torque generated by the electric motor drive system, and temporally thereafter, automatically increases the torque generated by the electric motor drive system.

In a method for maintaining a work tool for performing manual work, in particular a tool, preferably a chainsaw (1), comprising at least one drive element (5) that moves a working element, in particular a saw chain (6), and a display device (8, 8', 8") associated with the work tool, which displays information about the operating status of the work tool, a value, in particular a temperature and / or a time, is measured on the work tool by means of a measuring device (10, 11) of the moving working element. By means of a control device (9) and the display device (8, 8', 8"), a signal is sent to the display device (8, 8', 8") when a predetermined value of the measuring device (10, 11) is reached, in order to indicate a maintenance requirement by means of a display.A corresponding working device comprises at least one working element moved by a drive element (5) and a display device (8, 8', 8") associated with the working device. The working device includes a control device (9) and a measuring device (10, 11) of the moving working element, in particular a temperature measuring device (10) and / or a time measuring device (11). The control device (9) is connected to the display device (8, 8', 8") in order to send a signal to the display device (8, 8', 8") when a predetermined value of the measuring device (10, 11) is reached and to indicate a maintenance requirement by means of a display.

The invention relates to the technical field of chain saws, and discloses a chain saw with a safety protection structure, a second rotating shaft movably penetrates through the interior of a fixed cylinder, a protection frame is fixedly connected to one end of the second rotating shaft and is located on the outer side of a fixed cover body and the outer side of a shell, and the other end of the second rotating shaft is located in the fixed cylinder and movably sleeved with a second torsional spring; the other end of the second rotating shaft is fixedly connected with a push block on the outer side of the second torsional spring, and a touch switch is mounted on the outer side of the fixed cylinder and in the shell. When the chain saw moves downwards to be close to the leg of a person, a blocking frame on a protection frame abuts against the leg of the person, the protection frame is stressed to abut against the bottom of a limiting block and drives a second rotating shaft to rotate, the chain saw is supported through the protection frame, and a saw chain on a guide plate is prevented from being close to the leg of the person; meanwhile, the second rotating shaft rotates to drive the push block to abut against and press the outer side of the touch switch, the circuit is disconnected, the driving motor stops rotating, personnel are prevented from being injured, and guarantee is provided for personnel safety.

The utility model provides a chain saw, which comprises an oil liquid supply system, an oil liquid supply system, an oil liquid supply system, an oil liquid supply system and an oil liquid supply system, and the oil tank is used for storing oil liquid and comprises an oil liquid outlet and an oil liquid inlet; the first end of the oil outlet pipe is connected with the oil liquid outlet; the first end of the oil supply pipe is arranged towards the to-be-lubricated component; the oil pumping assembly comprises a pump body inlet and a pump body outlet, the pump body inlet is connected with the second end of the oil outlet pipe, and the pump body outlet is connected with the second end of the oil supply pipe; the oil pumping assembly can be switched between the forward rotation state and the reverse rotation state so that oil in the oil tank can be pumped out through the oil outlet pipe and supplied to a to-be-lubricated part through the oil supply pipe, or oil in the oil supply pipe can be sucked out and conveyed back into the oil tank through the oil outlet pipe. And residual lubricating oil in the oil pipe may overflow.

A control system automates operations of a chainsaw mill. The chainsaw mill has at least one powerhead, and at least one travel motor that mechanically engages with a drive belt to drive the at least one powerhead along a guide track. A tension sensor measures tension on the drive belt, and a powerhead sensor produces a revolutions per minute (RPM) measurement of the at least one powerhead. A powerhead controller is responsive to the RPM measurement for controlling the powerhead's throttle to keep the RPM near a predetermined RPM setpoint. A travel motor controller is responsive to the tension measurement for controlling the at least one powerhead's transit speed along the guide track to maintain drive-belt tension near a predetermined tension setpoint.

In a combination of a sprocket arrangement (128) and a saw chain (16), a sprocket tooth spacing (TI) between consecutive sprocket teeth (40) relates to a drive link spacing between consecutive drive links (30) of the saw chain (16) such that the guide teeth (42) of two or more drive links (30) may enter between a pair of consecutive sprocket teeth (40).

Devices (e.g., chain saws, other tools, etc.) are disclosed with a plurality of links arranged in a chain. A first link comprises a hook that engages a recess of a second link, thereby coupling the links and allowing them to pivot with respect to each other. The links may comprise fins adapted to be positioned in corresponding pockets to inhibit lateral dislocation. A gate may be provided to enable the links to be coupled laterally. One or more closures such as deformable ribs may be provided for closing the gate, and / or a snap-fit such as with a retention ledge may be provided for retention of the fin in the pocket. The links may also have a protruding tab adapted to be positioned in an indented socket of an adjacent link. The links may be tapered. A chain may have one or more spacer links.