137results about "Portable power driven saws" patented technology

A rotary cutting tool includes a battery pack receptacle, a handle, a motor, a blade driven by the motor, a blade guard surrounding the blade and a shoe. The shoe includes a base and an attachment portion. The base abuts a workpiece and provide a depth of cut. The attachment portion is perpendicular to the base. The attachment portion is welded to the base.

A circular saw may include a base plate and a blade guard assembly coupled to the base plate, the blade guard assembly including an upper blade guard and a lower blade guard movable between an extended position and a retracted position. A circular saw may include a housing assembly coupled to a saw blade guard assembly, an output shaft, and a saw blade clamp coupled to the output shaft, the saw blade clamp configured to hold a saw blade. The circular saw may include a brushless direct current (DC) motor positioned within the housing assembly and operable to rotate the output shaft. The circular saw may include an electronic controller configured to perform a field weakening operation on the brushless DC motor.

A circular saw includes an upper blade housing and a lower blade guard coupled to the upper blade housing. The lower blade guard rotates about an axis and includes a guide track. The circular saw includes a lever having a guide track engaging end and a user engaging end. The lever is coupled to the upper blade housing at a lever pivot point positioned between the guide track engaging end and the user engaging end. The guide track engaging end includes a contact member configured to engage the guide track to rotate the lower blade guard.

A bevel saw (10) configured to perform a bevel cut in a workpiece. The bevel saw includes a motor (90) and an arbor (100) configured to operably mount a circular saw blade (200) to the bevel saw (10) and to rotate the circular saw blade (200) within a blade plane. The bevel saw (10) further includes a base plate (304) defining an arbor-facing side and an arbor-opposite side. The arbor is operably mounted to the arbor-facing side of the base plate (304). The bevel saw (10) also includes a bevel guide (600) configured to selectively vary the bevel angle between the blade plane and the arbor-opposite side of the base plate (304) within a range of motion for the bevel cut angle to selectively vary the bevel cut angle within the workpiece, and may include a bevel guide mount (700) configured to operably mount the bevel guide (600) to the base plate (304).

A guide rail adapter (3) guides a portable cutting tool along a cutting direction relative to the guide rail. The guide rail adapter (3) has a rail-guided component relative to the guide rail and a base cover (5) that supports the portable cutting tool. A connecting component (6) allows the base cover (5) to be displaced in a direction that intersects a path of the rail (the cutting direction). A locking area (6i) prevents the base cover (5) from moving away from the rail.

The invention relates to an intelligent mobile device and an intelligent system comprising the intelligent mobile device, the intelligent mobile device can be provided with a working head, and the intelligent mobile device comprises an intelligent mobile device main body; the walking mechanism is mounted on the intelligent mobile equipment main body to drive the intelligent mobile equipment main body to move; one end of the connecting arm is rotatably mounted on the intelligent mobile equipment main body, the other end of the connecting arm extends towards one side far away from the intelligent mobile equipment main body and is provided with a connecting structure used for mounting the working heads, and the connecting arm is provided with different working heads through the connecting structure so as to carry out different types of work; and the control module is electrically connected with the connecting arm so as to control the working state of the connecting arm. According to the intelligent mobile equipment, different working heads can be installed through the connecting arm according to different states so as to conveniently and rapidly switch the working states, so that the intelligent mobile equipment has relatively low use cost and relatively high working efficiency, and different requirements of people are met.

The present invention improves workability. A cutting work machine has a discharge channel, concave with a discharge opening open to the left, disposed at an outer peripheral portion of a saw cover. A discharge inlet portion that connects the saw cover and the discharge channel are formed at a front end of the discharge channel. Viewed from above, a side guide surface constituting the right-side surface of the discharge channel inclines to the left toward the rear. The rear surface of the discharge channel consists of a rear guide surface inclined to the rear toward the left side. Thus, cutting chips flowing towards the rear-end side of the discharge channel along the side guide surface hit the rear guide surface and changes the chip outflow direction to the left side (discharge opening side). With cutting chips being discharged substantially leftward from the discharge opening, the workability of the cutting work machine improves.

Circular saws are disclosed herein. The circular saws include a cutting assembly, a base plate, a pivot assembly, and a pivot bias mechanism. The cutting assembly includes a motor and an arbor. The base plate defines an assembly-facing side and an assembly-opposed side. The pivot assembly operatively attaches the cutting assembly to the base plate. The cutting assembly and the base plate are configured to operatively rotate, relative to one another and about a pivot axis of the pivot assembly, to selectively vary a region of the circular saw blade that extends on the assembly-opposed side of the base plate. The pivot bias mechanism is configured to apply a linear force between the cutting assembly and the base plate in a linear bias direction that urges the cutting assembly and the base plate in opposed directions along the pivot axis.

To provide a portable process machine, in which a use feeling of a user can be improved.SOLUTION: A portable process machine comprises a base, a cover part covering a cutting tool at least partially, a main body part on which the cutting tool is mounted, and an energizing member. The main body part is configured to be displaceable with respect to the base and the cover part, between a first position where the cutting tool is wholly stored in the cover part and a second position where the cutting tool is partially exposed out of the cover part. The main body part has a first contact part that can come into contact with the cover part, and the cover part has a second contact part that can come into contact with the main body part. The portable process machine is configured so that the main body part is energized by the energizing member in a direction in which the part moves from the second position toward the first position and therefore the first contact part comes into contact with the second contact part, which enables the main body part to be positioned at the first position. At least either of the first contact part and the second contact part is formed of an elastic body.SELECTED DRAWING: Figure 7

The present invention relates to a tool blade (14) having a structure (24) comprising at least two elements (22) on at least one side (26) of the tool blade (14), wherein the structure (24), together with its elements, is rotationally symmetric with respect to a rotation angle of less than 360°, particularly 180° at most, about the central blade rotation axis (R) of the tool blade (14), but is not mirror-symmetric with respect to any diameter of the tool blade (14) extending through the blade rotation axis (R). The present invention also relates to a tool mounting section (12), a tool blade system (15), and a power tool (10). The tool enables particularly safe operation.

Circular saws with transparent windows that extend within blade guard openings and cover fastening structures. The circular saws include a motor and an arbor configured to operatively attach a circular saw blade to the circular saw. The circular saws also include a blade guard. The blade guard includes a blade guard opening, which is positioned to permit a user of the circular saw to view a leading edge of the circular saw blade as the circular saw cuts a workpiece. The circular saws also include a transparent window, which extends within the blade guard opening, and a cover fastening structure, which is configured to selectively attach a splinter guard to the blade guard while the transparent window extends within the blade guard opening.

A lockout mechanism for use with a saw, the lockout mechanism including a lockout actuator, a lever, and a pin. The lockout actuator is movable between a safety position in which the lockout actuator inhibits actuation of a trigger and a use position in which the lockout actuator permits actuation of the trigger. The lever is coupled to and movable with the lockout actuator and the pin. The pin is movable between a first position and a second position. The first and second positions correspond with the safety position and use position, respectively. In the first position, the pin is configured to inhibit a motor housing from being moved from a raised position toward a plunged position. In the second position, the pin is configured to permit the motor housing to be moved from the raised position toward the plunged position.

To provide a technique which can suppress rattling of a cutting machine during tilting operation, smoothly tilt a cutting machine body relative to a base, and suppress height of angular plate to improve visibility.SOLUTION: A portable cutting machine comprises: a base; a body part; a tilting support member which supports the body to the base so that the body can be tiltable around a first axis line relative to the base; a link arm; a groove part which is arranged at a front-end part of the base; and a stationary part. The link arm is provided with a first end part and a second end part directly or indirectly connected with the body and can rotate relative to the body part in conjunction with tilting of the body around a first axis line of the body part. The stationary part is connected with the second end part of the link arm. The stationary part is switchable between a fixed state where the second end part is fixed to the groove part and a released state where the fixed state is released, and is slidable along the groove part in conjunction with rotation of the link arm in the released state.SELECTED DRAWING: Figure 1

The invention relates to a holding element (60) for a device for supporting and / or guiding a machine tool (20) or a workpiece (W). The device has a contact body (40) with a contact surface (42) for placing on a working surface (H) of a workpiece (W) or a wall. The holding element (60) has an adhesive (70) for adhering to the working surface (H) and a securing means for a releasable hold on the contact body (40), wherein the securing means comprises at least one formfitting contour (90) for a formfitting hold on a holding element receiving area (55) of the contact body (40).

The invention relates to a scoring tool (60) for a sawing machine, wherein the scoring tool (60) is designed for rotatable drive about a rotary axis (DV) and has a disc-shaped blade body (62) with flat sides (63) facing away from each other, which has a machine mount (64) in its center (65) through which the rotary axis (DV) penetrates, for detachable attachment to a scoring tool mount (24) of the sawing machine, and on its radial outer circumference (A62) with respect to the rotary axis (DV) has a scoring tooth arrangement (70) for creating a score (RI) in a first workpiece surface (WO) of a workpiece (W), wherein the scoring tooth arrangement (70) has at least one scoring tooth (71) with a main cutting edge (72) extending perpendicular to the flat sides (63) and running between secondary cutting edges (73), and wherein an outer diameter extending radially outward around the machine mount (64) (66) of the scoring tool (60) is a maximum of 80 mm,and wherein, with respect to the axis of rotation (DV), radially outer end regions (74) of the secondary cutting edges (73) have a first transverse distance (Q1) parallel to the axis of rotation (DV) and, with respect to the axis of rotation (DV), radially inner end regions (75) of the secondary cutting edges (73) intended for cutting the groove (RI) into the workpiece (W) have a second transverse distance (Q2) parallel to the axis of rotation (DV), wherein the first transverse distance (Q1) determines a width of the groove at its groove bottom (RB) and the second transverse distance (Q2) determines a maximum width of the groove (RI) and the second transverse distance (Q2) is at least as large as the first transverse distance (Q1). The first transverse distance (Q1) is at most 0.75 times the second transverse distance (Q2) and / or is less than a distance parallel to the axis of rotation (DV) between the flat sides (63) of the leaf body (62) in the area of ​​at least one sprocket tooth (71).

Circular saws include blade mounts for circular saw blades and methods of attaching circular saw blades to circular saws. The circular saws include a motor, an arbor, and a blade mount. The motor includes a motor shaft configured to rotate about a shaft rotational axis. The arbor is configured to receive a torque from the motor when the motor shaft rotates about the shaft rotational axis. The blade mount is operatively attached to the arbor and is configured to selectively and operatively attach a circular saw blade to the arbor. The blade mount includes an inner flange that includes an inner flange blade-contacting surface that faces away from the motor. The inner flange is free from any structure that projects away from the motor and also away from the inner flange blade-contacting surface.

Handheld circular saws with improved cutting capabilities are disclosed herein. The handheld circular saws include a motor and an arbor, which is configured to operatively attach a circular saw blade to the handheld circular saws. In some examples, the handheld circular saws include the circular saw blade, the circular saw blade has a blade diameter, the handheld circular saw has a maximum depth-of-cut, and a ratio of the maximum depth-of-cut to the blade diameter is at least 0.35 and at most 0.45. In some examples, the handheld circular saw includes a base plate that defines an arbor-facing side. In some such examples, at least 95% of the handheld circular saw is fully contained within a footprint of the handheld circular saw. In some such examples, an entirety of the handheld circular saw may be contained within a base plate width of the base plate.

A cordless aw is provided with regenerative braking means that increases the number of repeated cuttings the saw is able to perform (x) per full discharge cycle of the battery pack, as compared to the number of repeated cuttings achievable by the same saw not employing a regenerative braking means (y) per full discharge cycle of the battery pack, such that x / y is approximately at least one of the following: i) 1.1 when cutting a Pressure-Treated (PT) lumber workpiece having a cross-sectional size of approximately 89 mm×89 mm±2 mm, ii) 1.15 when cutting a Spruce Pine Fir (SPF) lumber workpiece having a cross-sectional size of approximately 38 mm×89 mm±2 mm, or iii) 1.25 when cutting Medium Density Fiberboard (MDF) workpiece having a thickness of approximately 19 mm±1 mm and a width of approximately 76 mm±2 mm.

A handheld machine saw having a saw assembly, which has a saw toolholder for a saw tool and a saw drive motor for driving the saw toolholder, and having a guide device, which has a guide body having a guide surface extending along a longitudinal axis for guiding the handheld machine saw along a working direction on a workpiece or a guide rail, wherein the handheld machine saw has a scoring assembly, which is arranged in front of the saw assembly on the guide device with respect to the working direction, having a scorer toolholder for a scoring tool and having a scoring drive for driving the scorer toolholder, wherein a score upstream from the saw cut to be introduced in the working direction can be introduced into the workpiece by means of the scoring tool protruding in front of the guide surface in scoring operation of the handheld machine tool.

A connector for coupling a particle outlet of a handheld machine tool to a particle receiving device is described. The connector has a tube-shaped inlet portion extending along an inlet axis and a tube-shaped outlet portion extending along an outlet axis. The tube-shaped outlet portion is for coupling to the particle receiving device. The inlet portion has a body section and an engagement section. The engagement section is resiliently coupled to the body section. The engagement section has an engagement geometry for mating with an engagement counter-geometry on the particle outlet, such that a positive locking effective along a circumferential direction is provided between the engagement geometry and the engagement counter-geometry. Moreover, a lock is coupled to the inlet portion. The lock is for selectively blocking a movement of the engagement section relative to the body section. Moreover, a handheld machine tool, a handheld machine tool assembly, and a method for operating a handheld machine tool assembly are presented.

A collection container (14) for collecting workpiece particles is described. The collection container (14) includes a container housing (22) having an inlet port (26) and an outlet. Furthermore, the collection container (14) comprises a support device (140) arranged on the container housing (22). The support device (140) is configured for supporting the container housing (22) on the guide rail (16) and / or a base plate of the hand-held power tool (12). Furthermore, a hand-held power tool assembly (18) is proposed. A hand-held power tool assembly (18) includes a hand-held power tool (12) and a collection container (14). In addition, a particle collection assembly (20) is shown. The particle collection assembly (20) includes a guide rail (16) and a collection container (14). A support device (140) of the collection container (14) is supported on the guide rail (16). A hand-held power tool system (10) is also presented. A handheld power tool system (10) includes a particle collection assembly (20) and a handheld power tool (12). Furthermore, the use of a guide rail (16) for supporting a collection container (14) is explained.

A carriage (4) includes: a housing (24) slidably mounted on a track (8); a platform (26) on which an object to be cut by a cutting device (14) mounted on the track (8) is placed; and a stop (34) that stops the object relative to the cutting device (14) while the object is placed on the platform (26), wherein the platform (26) is movable relative to the housing (24) between a raised position and a lowered position, wherein when the housing (24) is slidably mounted on the track (8), in the lowered position the platform (26) is closer to the track than in the raised position.

A chip collection box for a cutting tool, the cutting tool including a cutter for performing a cutting operation and a protective cover at least partially covering the cutter, a chip guiding channel being provided in the protective cover, the chip collection box being attached to the protective cover and having a chip collecting inlet in communication with the chip guiding channel, a chip collection chamber for receiving chips, and a chip collecting outlet for discharging the chips, and the chip collection chamber being provided with at least one chip overflow port. The chip collection box for a cutting tool allows, when too many chips are accumulated in the chip collection chamber, at least part of the chips to automatically overflow from the chip overflow port, thereby avoiding the risk of the chips clogging the cutter or melting the chip guiding channel due to further accumulation of the chips in the chip guiding channel.

The utility model belongs to the technical field of electric tools, and particularly relates to an electric circular saw convenient to assemble and capable of efficiently dissipating heat, the electric circular saw comprises a motor, the motor comprises an output shaft rotating around the axial direction of the motor and a housing covering the periphery of the motor, and an airflow channel is formed in the housing; the fan is arranged at one end of the opening of the housing and is connected with the output shaft; the shell assembly comprises a first shell and a second shell which are oppositely arranged and connected, and at least part of the fan and at least part of the motor are contained in the first shell; the control assembly is arranged in the second shell and connected with the end, away from the opening, of the cover shell, the control assembly comprises a heat dissipation shell and a circuit board assembly, the heat dissipation shell is located between the circuit board assembly and the cover shell, the second shell is provided with an air inlet allowing airflow to circulate, and the air inlet communicates with the airflow channel; at least part of airflow generated by the fan sequentially flows through the circuit board assembly, the heat dissipation shell and the airflow channel. Efficient heat dissipation can be achieved, and the overall performance of the electric circular saw is improved.

A circular saw (100) including a housing (102) and a motor (120) disposed within the housing. The circular saw also includes a blade removably coupled with the driveshaft (122) of the motor and operable to rotate therewith and a bottom plate (140) rotatably coupled to the housing. The bottom plate defines a zero plane (164) in which the blade is orthogonal to the bottom plate. The bottom plate rotates in a first direction from the zero plane and in a second direction from the zero plane opposite the first direction.

Provided is a work machine capable of controlling a connection switching unit at an appropriate timing. A computing unit 50 is capable of performing connection switching control for switching the coil connection scheme of a motor 340 from a delta connection to a star connection. The computing unit 50 is configured to start the connection switching control in a state where the motor rotational speed is higher than the idling rotational speed (star connection idling rotational speed) of the motor 340 during the star connection, and complete the same while the motor rotational speed is equal to or lower than the star connection idling rotational speed. The computing unit 50 is configured so as to, when an inverter circuit 64 is in a drive stop state during the connection switching control, switch from a state in which a delta connection relay element 32 is ON and a star connection relay element 33 is OFF to a state in which both the delta connection relay element 32 and the star connection relay element 33 are OFF (connection terminated state), and switch from the connection terminated state to a state in which the delta connection relay element 32 is OFF and the star connection relay element 33 is ON.

A device may include a first motor including a first motor output shaft coupled to a first pinion. A device may include a second motor including a second motor output shaft coupled to a second pinion. A device may include a transmission including: a master gear configured to engage the first pinion and the second pinion, an input pulley coupled to the master gear, the input pulley having a first diameter, and an output pulley coupled to an output shaft configured to rotate a saw blade, the output pulley having a second diameter that is smaller than the first diameter.

The application discloses a handheld electric circular saw, which comprises a saw blade, an output shaft, a motor, a shell, a bottom plate, a fixed guard and a movable guard. The shell comprises a motor casing for accommodating the motor and a holding part for being held by a user. The bottom plate comprises a bottom plate plane for contacting a workpiece. The fixed guard is fixedly connected with the shell. The movable guard is rotatably connected with the fixed guard. The handheld electric circular saw can be supported on a work surface through the movable guard and the bottom plate. When the handheld electric circular saw is supported on the work surface through the movable guard and the bottom plate, the bottom plate plane is inclined relative to the work surface, and the cutting plane where the saw blade is located is substantially perpendicular to the work surface. The above scheme can provide the handheld electric circular saw with good overall balance, which is not easy to be inclined and is more convenient for a user to hold. The guard and the bottom plate of the handheld electric circular saw are not subjected to lateral force, so that the service life of the guard and the bottom plate can be effectively prolonged.

A work machine according to the present invention optimally collects work chips, such as dust, produced during work. In a circular saw 10, a sawdust discharge port 27H and a cover opening 27J are formed in an inner cover 27, and a dust collecting chamber inlet 62L1 and a dust collecting chamber outlet 62L2 are formed in a dust collecting case 60. Furthermore, at least a portion of the dust collecting chamber inlet 62L1 and at least a portion of the dust collecting chamber outlet 62L2 are arranged at the same position in the vertical direction.

To improve operability at the time of working.SOLUTION: A power tool includes: a motor 34; a housing 22 for accommodating the motor 34; an output shaft 34A driven by the motor 34; a control unit 90 for controlling the motor to operate; a trigger 42 for bringing the motor 34 into a drive state and a non-drive state; and a tact switch 56 capable of changing a control state of the control unit for the motor 34 with the operation by an operator. The control unit 90 varies the control state to change depending on when the tact switch 56 is operated while the motor 34 is in the non-drive state and when the tact switch 56 is operated while the motor 34 is in the drive state.SELECTED DRAWING: Figure 10