2365results about "Portable grinding machines" patented technology

A battery pack includes a battery housing; a battery module disposed in the battery housing, where the battery module includes multiple battery cells, and at least one of the battery cells is a solid-state battery; and a control circuit disposed in the battery housing and configured to use the battery module to supply the electric power to the power tool. The energy W of the battery pack and the volume V1 of the battery pack satisfy the following: when the energy W is greater than or equal to 200 Wh, the volume V1 is less than or equal to 400 cm3; or when the energy W is greater than or equal to 300 Wh, the volume V1 is less than or equal to 800 cm3; or when the energy W is greater than or equal to 700 Wh, the volume V1 is less than or equal to 2500 cm3.

An apparatus for polishing a butt weld includes a machine frame; a polishing mechanism, including a rotating arm, a supporting column rotatably mounted on the rotating arm, and a polishing roll rotatably mounted on the supporting column in a circumferential direction of the polishing roll; an angle limiting assembly, movably mounted on the rotating arm, the angle limiting assembly limiting an angle at which an outer side end of the supporting column swings upward; a roll driving part, mounted on the rotating arm. The roll driving part is in transmission connection with the polishing roll and drives the polishing roll to rotate on the supporting column in the circumferential direction of the polishing roll. An arm driving part is mounted on a fixed frame, the rotating arm being mounted on the arm driving part, and the arm driving part drives the rotating arm to rotate in a circumferential direction.

The invention discloses a steel pipe polishing equipment, which comprises a steel pipe polishing equipment body. A main valve of a polishing motor is arranged in the main body of the steel pipe polishing equipment; a polishing handle is arranged on the main valve of the polishing motor; The valve is provided with a rotating roller; the front end of the rotating roller is provided with polishing bristles; one side of the rotating roller is provided with an outer throwing roller; a clamping spring is arranged between the outer throwing roller and the rotating roller; The outer throwing roller is provided with an outer throwing brush; a symmetrical magnet is arranged between the outer throwing brush and the polishing bristles; a polishing wheel is arranged on the outer throwing brush and the polishing bristles; the polishing The grinding wheels are arranged in a figure-eight shape. Its structure is simple, easy to use, and easy to operate. It can realize the polishing of the outer surface and the inner wall. The polishing is fast and uniform, with high efficiency and convenient use.

An orbital sander includes a housing, a motor within the housing and having a drive shaft defining a motor axis, an eccentric drive unit coupled to the drive shaft and configured to convert rotation of the drive shaft to an orbit motion around the motor axis, a sanding pad defining a horizontal work plane and coupled to the eccentric drive unit for orbital motion about the motor axis, and a battery receptacle extending along the housing. The battery receptacle is operable to receive a removable battery pack for providing electrical current to the motor. The battery receptacle defines a battery axis along which the battery pack is installed and the battery axis forms an acute battery angle relative to the work plane.

A power tool, including: a housing, extending in a longitudinal direction; and a fan, a motor, and a circuit board that are received in the housing. The housing defines an air outlet, a first air inlet, and a second air inlet. The first air inlet is adjacent to the motor, and the second air inlet is adjacent to the circuit board; the first air inlet is disposed between the air outlet and the second air inlet. The power tool includes a first heat dissipation air path that flows through the motor and a second heat dissipation air path that flows through the circuit board. The motor includes an output shaft extending along the longitudinal direction. The output shaft is connected to the fan; the air outlet, the fan, the first air inlet, and the second air inlet are arranged sequentially in an axis direction of the output shaft.

A power tool is provided including a housing having a grip portion with a grip circumference of smaller than or equal to approximately 120 mm; and a brushless direct-current (BLDC) motor at least partially disposed within the grip portion of the housing and configured to output a maximum power output of at least 450 watts. The motor includes a stator including a stator core and stator windings; and a rotor rotatably received within the stator and including a rotor shaft extending along a longitudinal axis and a series of permanent magnet rings mounted sequentially along the longitudinal axis and surrounding the rotor shaft, each permanent magnet including a plurality of magnetic poles.

There is provided be a brushless direct current, BLDC, electric motor. The BLDC electric motor comprises a rotor comprising a rotor shaft and a stator arranged around the rotor shaft. The stator comprises a stator hub comprising electromagnets, and cooling channels extending in a direction that is parallel to a longitudinal direction of the rotor shaft and the cooling channels are positioned between the rotor shaft and the electromagnets.

The invention refers to hand-held power tool (10) comprising a tool housing (12), a motor (24) and a tool shaft (36) having a rotational axis (40) and actuated by the motor (24), and further comprising a working element (38) releasably attachable to the tool shaft (36) from outside the tool housing (12) in an axial direction and, after attachment to the tool shaft (36), held in respect to the tool shaft (36) by means of an axial holding arrangement (80). The axial holding arrangement (80) comprises a first element (36; 38) constituted by one of the working element (38) and the tool shaft (36) and a second element (38; 36) constituted by the other one of the working element (38) and the tool shaft (36), and at least two locking elements (70) assigned to the first element (36; 38) movably in a radial direction between a retracted position and a locking position, at least one recess (66) assigned to the second element (38; 36) for receiving the locking elements (70) when in their locking positions. The locking elements (70) or the second element (38; 36) in and / or around the at least one radial recess (66) comprises a magnetic material and the at least other one of the locking elements (70) and the second element (38; 36) in and / or around the at least one radial recess (66) comprises a magnetic material or a ferromagnetic material. The locking elements (70) are automatically moved into and held in their locking positions and in the at least one radial recess (66) by means of magnetic force after attachment of the working element (38) to the tool shaft (36).

A handheld power tool includes a grip for a user to hold; an output shaft rotatable about a first axis; a mounting device for mounting a working attachment to the output shaft, where the working attachment has a mounting port that matches the output shaft; and an operating member capable of driving the output shaft to move along the direction of the first axis to lock or loosen the working attachment. The operating member could be located at least at a first position, a second position and a third position. When the operating member is located at the first position, the working attachment is locked; when the operating member moves from the first position to the second position, the output shaft moves downward along the first axis by a first preset distance. The third position is different from the first position and the second position.

The invention provides a manual grinding tool, and belongs to the technical field of grinding tools. Comprising a fixing base, a fixing rod and a cover plate detachably mounted on the fixing base, a plurality of sliding grooves and a plurality of first mounting grooves are formed in the top wall of the fixing base at equal intervals, detachable abrasive paper sheets are mounted in the first mounting grooves, sliding blocks are slidably arranged in the sliding grooves in a limited mode, and expansion assemblies are mounted at the inner ends of the sliding blocks; and the abrasive paper sheet is extruded by the sliding block. By arranging the expansion assembly, when the second rolling wheel is adjusted, the abraded abrasive paper belt can be moved, the whole grinding head does not need to be replaced by adjusting the position of the abrasive paper belt, and therefore the problem that when a traditional integrated grinding head is abraded to a certain degree, the whole grinding head needs to be replaced is solved. The grinding head is not fully utilized; and the material is wasted. And when the grinding range of the fixing base is adjusted, the second rolling wheel can compensate the length of the abrasive paper belt, and therefore the abrasive paper belt adjusting stability is further improved.

The invention refers to an eccentric element (10) configured for use in a hand-held power tool comprising a tool motor for driving a tool shaft (16), in particular for use in an orbital sanding or polishing machine. The eccentric element (10) comprises: an eccentric part (12) with a top surface (18) attachable to a distal end (22) of the tool shaft (16) or forming an integral part therewith so as to transmit a torque from the tool shaft (16) to the eccentric element (10) and to rotate the eccentric part (12) about a first rotational axis (28) upon activation of the tool motor, a bottom surface (32) to which a working element (30) of the power tool is releasably attachable in a manner freely rotatable about a second rotational axis (34), and a counterweight part (14) attached to the eccentric part (12). The eccentric part (12) and the counterweight part (14) are separate components and formed such that they enter into a mutual interlocking relationship upon attachment of the counterweight part (14) to the eccentric part (12), the interlocking relationship acting in at least one direction (76; 82; 86).(FIG. 3)

The utility model relates to the technical field of devices for removing dust on grinding machines or polishing machines, in particular to a handheld dustproof grinding machine and a handheld dustproof grinding device. A handheld dustproof grinding device comprises a handheld dustproof grinding machine and a grinding head, the handheld dustproof grinding machine comprises a shell, a grinding inner cavity used for containing the grinding head and a dust collection channel are formed in the shell, and an outlet of the dust collection channel is formed in the shell and used for being connected with an external dust collector. A peripheral surrounding breathable dustproof part is arranged at a port of the grinding inner cavity, a driving device is further arranged on the shell, the power output end of the driving device extends into the grinding inner cavity to be used for assembling a grinding head, and an inlet of the dust collection channel communicates with the grinding inner cavity. And the inner wall, located in the polishing inner cavity, of the shell is used for forming a radial gap between the inner wall and the polishing head after the polishing head is assembled, so that dust is sucked to the dust suction channel through the radial gap, the suction effect is better, the good dustproof effect is achieved, and the polishing effect is effectively improved.

A hand-held grinding machine includes a disc tool having a machining face for machining a workpiece; a motor for driving a holder holding the tool arranged in a machine housing; a port for removing dust during machining; and an energy-storage-device interface for detachably connecting, using a connection interface, an energy storage device for supplying electrical energy to the grinding machine that includes an energy-storage-device housing extending along an energy-storage-device longitudinal central plane; and a handle for grasping and guiding the grinding machine forwards along the workpiece in a working direction parallel to a machine longitudinal central plane of the machine housing extending transversely to the machining face. The energy-storage-device interface is arranged relative to the machine plane and / or the connection interface is arranged relative to the energy-storage-device plane such that the energy-storage-device plane is distanced transversely from the machine plane when the device is on the energy-storage-device interface.

The invention discloses a surface treatment tool which comprises a machine shell, a driving assembly, a transmission system and a working accessory, the driving assembly is arranged in the machine shell and comprises a motor, and a motor shaft of the motor can rotate along with the axis of the motor; the transmission system comprises an input shaft and an output shaft, the input shaft can rotate along with an input axis, and the output shaft can rotate along with an output axis; the working accessory is connected with the output shaft; a first plane P1 is defined, an intersection point of the first plane P1 and an input axis is a first intersection point C1, an intersection point of the first plane P1 and an output axis is a second intersection point C2, a connecting line generated by the first intersection point C1 and the second intersection point C2 is a transmission center line, and an included angle between a projection line of a motor axis to the first plane P1 and the transmission center line is a first included angle alpha, the first included angle alpha is larger than or equal to 90 degrees and smaller than or equal to 170 degrees. The whole machine is not in linear layout any more, and other parts can be conveniently arranged in the space between the motor axis and the transmission center line.

The invention discloses dental prosthesis manufacturing equipment based on 3D printing, relates to the technical field of dental prosthesis manufacturing, and aims at solving the technical problems that in the dental prosthesis grinding process, a proper grinding tool needs to be frequently found for grinding, the process is troublesome, time is wasted, and the grinding efficiency is reduced. Comprising an output cavity assembly, a cylindrical grinding assembly, a spherical grinding assembly and a conical grinding assembly, the output cavity assembly comprises a transmission bin and a fixed bin, the transmission bin is movably connected with the fixed bin, the cylindrical grinding assembly comprises a first rotating cylinder, one end of the first rotating cylinder is connected with a cylindrical grinding head, and a spherical grinding head is arranged in an inner cavity of the cylindrical grinding head; a conical grinding head is arranged in an inner cavity of the spherical grinding head. The dental prosthesis grinding device has the advantages that grinding equipment of various specifications does not need to be prepared, all-around grinding of the dental prosthesis can be completed only through the dental prosthesis grinding device, convenience is achieved, the grinding time is saved, and the grinding efficiency is improved.

A flatness control structure for a drywall sander, comprising: a device body, wherein the bottom of the device body is equipped with a rotating device, a housing is arranged below the device body, a sanding component is arranged inside the housing, the sanding component comprises a sanding piece, the bottom of sanding piece is connected to a sanding disc, and the bottom of sanding disc is connected to sandpaper, a threaded bolt is arranged between the sanding piece and the housing, a fixing component is arranged inside the housing, and an installation component is arranged inside the housing. The sander replaces the bristle sections with a wear-resistant strip which is less likely to deform when in contact with the sanding surface. When force is applied, the sander can be firmly fixed on the sanding surface, ensuring stability of the entire sander, thereby improving the flatness of the sanding surface.

An integrally formed tool arm for a power cutter, the tool arm comprising a first aperture (310) for receiving a motor axle, a second aperture (320) for receiving a tool axle of a rotatable work tool, wherein the first aperture (310) and the second aperture (320) are intersected by and orthogonal to a longitudinal extension axis of the tool arm, the tool arm further comprising first rail cutting accessory attachment means (330) arranged to receive a rail cutting accessory, wherein the first rail cutting accessory attachment means (330) is arranged offset from the longitudinal extension axis of the power cutter arm.

The utility model discloses a carbon fiber pipeline orifice polisher, which relates to the field of carbon fiber pipeline mounting equipment, and adopts the technical scheme that the polisher comprises a circular tubular central pipe, one end part of the central pipe is rotatably provided with a rotating arm, and the other end of the central pipe is provided with a supporting unit; a through groove is formed in the middle of the rotating arm, a sliding block is slidably arranged in the through groove, a grinding motor is fixedly arranged on the sliding block, and a grinding wheel is installed on a motor shaft of the grinding motor. The pipeline polishing device has the beneficial effects that the structure is simple, the adjustment is convenient, surrounding type rotating polishing can be performed on a pipeline, the polishing mode is changed, and the polishing quality is improved; and the device can adapt to pipelines with different diameters and is high in universality.

The invention discloses a steel formwork surface treatment robot based on magnetic adsorption wall climbing, and belongs to the technical field of polishing and cleaning, the steel formwork surface treatment robot comprises a walking chassis and a polishing head, the polishing head is composed of a support, a flexible screw-down mechanism and an angle grinder, the support is arranged on the walking chassis, and the angle grinder is arranged on the support through the flexible screw-down mechanism; the flexible pressing mechanism is composed of a vertical frame, a U-shaped supporting plate, a triangular groove frame, an H-shaped double-fork arm, an adjustable damping spring and a connecting plate. The vertical frame is connected with the U-shaped supporting plate so as to clamp the angle grinder. The triangular groove frame is hinged to the U-shaped supporting plate through a fourth hinge shaft. The H-shaped two-fork arm is rotationally connected with the connecting plate and is hinged with the two vertical frames through a second hinge shaft and a third hinge shaft respectively; the two ends of the adjustable damping spring are hinged to the fifth hinge shaft and the connecting plate correspondingly, and the connecting plate is fixedly connected to the support. The first hinge shaft and the second hinge shaft of the triangular groove frame are rotationally connected to the support. According to the robot, efficient and stable automatic grinding and cleaning operation can be achieved in the complex construction environment, and the risk and cost of manual operation are reduced.

The utility model relates to the technical field of machining, in particular to a flexible grinding head structure, which comprises a flexible sleeve, a rear grip detachably connected with one end of the flexible sleeve, a front grip slidably sleeved on the flexible sleeve, a grinding head for grinding burrs, and a motor mounted in the rear grip and used for driving the grinding head to rotate. A flexible steel wire for transmission is fixedly connected between the grinding head and the output end of the motor; the front grip comprises a shell slidably arranged on the flexible sleeve in a sleeving mode and an abutting joint inserted into the shell in the radial direction, the end, close to the flexible sleeve, of the abutting joint can make contact with the outer surface of the flexible sleeve, and a spring used for resetting the abutting joint is fixedly installed at the end, away from the flexible sleeve, of the abutting joint. According to the scheme, the technical problem that an existing hard polishing tool cannot stretch into a deep cavity in a workpiece to clean burrs can be solved.

A grinding machine has a machine housing and a drive motor arranged therein, for rotating and / or oscillating drive of a tool holder to which a disk tool is releasably attachable. The machine has a disk tool cover delimiting a dust removal space in which the holder is arranged and which holds the tool when the tool is arranged on the holder. A dust removal connector through which a dust / air stream can flow is arranged on the space. A dust removal device is connectable to the connector. The dust / air stream conveys out of the space dust occurring during machine operation. Away, and separately, from the connector, at least one external air inlet for letting in external air is arranged on the space. The machine has a closure mechanism arranged on, or activated using, the device. The inlet is closable, at least in part, with the mechanism.

The utility model relates to the technical field of paint coating production, and discloses a paint coating grinding machine which comprises a grinding machine body, a grinding disc is arranged at the bottom end of an output shaft of the grinding machine body, an adjusting assembly is arranged at the end of the output shaft of the grinding machine body, and the adjusting assembly comprises a connecting cylinder movably arranged at one end of the output shaft of the grinding machine body in a sleeving mode. The grinding disc and the bottom end of the connecting cylinder are detachably installed, a connecting ring is fixed to the outer wall of the connecting cylinder, and the outer wall of the output shaft of the sand mill body is in threaded connection with an adjusting nut. The length of the spring is adjusted, so that the spring can apply larger or smaller elastic force to the grinding disc, the spring generates reverse elastic force, the grinding disc applies pressure to the surface of a material, and therefore the downward pressure of the grinding disc to the surface of the material during grinding can be dynamically adjusted according to the grinding requirement; and therefore, the grinding effect of the sand mill is better, and the grinding speed is higher.

A family of power tools provided, the power tools including a common back-end assembly comprising a tool housing, a motor disposed within the tool housing, a peripheral switch, and other features that are substantially the same on the common back-end assembly; and distinct front-end assemblies securely mounted to the back-end assembly. The family of power tools provide significantly high power-to-weight and power-to-volume ratios.

The invention discloses a combined type wind power blade rear edge mold closing foam machining tool, and relates to the technical field of grinding equipment. Comprising a grinding machine control main body, a grinding driving mechanism is arranged at the left side end of the grinding machine control main body, a rotating plate is arranged at the lower end of the grinding driving mechanism, grinding abrasive paper is arranged below the rotating plate, a protective dust collection mechanism is arranged on the outer side of the rotating plate, and an auxiliary frame is arranged on the side wall of the grinding machine control main body. The closed grinding space is constructed through the protective dust collection mechanism, the elastic cover and the abutting ring are matched to seal the grinding area, the dust collection opening, the dust collection frame and the dust collection pipe are matched to form a negative pressure dust collection channel, foam chippings generated during grinding can be rapidly collected, and meanwhile the situation that the chippings are attached to the surface of a mold or a blade to affect the mold closing precision and the bonding quality is prevented. And the sweeping mechanism is matched with the vibration block and the supporting spring, and vibrates after the vibration block collides with the sweeping rod, so that the swept chippings are shaken off and are extracted from the dust suction opening, and the chipping cleaning efficiency is further improved.

The utility model discloses a dust collection device of a tooth set grinding machine, which comprises a grinding machine body, a clamping mechanism and a dust collection mechanism, and is characterized in that the grinding machine body comprises an electric grinding pen and a control box electrically connected with the electric grinding pen; the clamping mechanism comprises a clamping sleeve connected to the tail end of the electric grinding pen in a sleeving mode, a rotating sleeve connected to the clamping sleeve in a threaded sleeving mode and a connector arranged at the tail end of the clamping sleeve. The dust collection mechanism comprises a universal air pipe detachably installed at one end of the connector, a conveying air pipe detachably installed at the other end of the connector and a dust collection box fixedly connected to the tail end of the conveying air pipe. According to the dust collection mechanism with the clamping sleeve and the rotating sleeve, the dust collection mechanism can be clamped on the electric grinding pen and can adapt to the electric grinding pen with the small diameter, the universal air pipe is arranged, the dust collection cover can be flexibly adjusted so as to be accurately aligned with the grinding head, dust can be effectively collected at any operation angle and position, and the dust collection efficiency is improved. The universality and the operation flexibility of the equipment are obviously improved, and the fatigue caused by long-time work is relieved.

Tool, especially for preparing a pipe end for crimping, with a sleeve with a first end and an opposite second end, wherein the sleeve has an interior space, a drive element connected to the first end of the sleeve for rotating the sleeve, the interior is designed to accommodate a pipe end wherein an abrasive is arranged in the interior for grinding the pipe end when the tool is rotated.

The utility model relates to the technical field of steel structure machining, in particular to a groove grinding device for steel plate welding, which comprises a handle, a grinding wheel and a semicircular baffle disc, a driving part for driving the grinding wheel to rotate is arranged in the handle, and the semicircular baffle disc is mounted between the handle and the grinding wheel and positioned on one side, close to the handle, of the grinding wheel. A movable blocking cover is detachably installed at the opening end of the semicircular blocking disc, material blocking ripping fences are arranged on the outer contours of the movable blocking cover and the semicircular blocking disc, the end faces of the sides, close to the grinding wheel, of the material blocking ripping fences do not exceed the non-working face of the grinding wheel, and a plurality of magnets used for attracting steel scraps are arranged on the surfaces of the sides, close to the grinding wheel, of the movable blocking cover and the semicircular blocking disc. The problems that when a bevel slope of a traditional steel plate is polished before welding, a worker needs to hold an angle grinder by hand for operation, waste chips generated during polishing are likely to splash to the worker, the worker is damaged, and potential safety hazards exist are solved.

The utility model belongs to the technical field of electrolytic aluminum, and discloses a multifunctional tail end ferrophosphorus cleaning mechanism which comprises a rack, a guide rail is installed on the rack and slidably connected with a floating base, an outer ring of the guide rail is sleeved with a compression spring, and the floating base moves in the axis direction of the guide rail to change the compression amount of the compression spring. The floating base is connected with the angle grinder body through the fixing support, a rotating shaft of the angle grinder body is connected with the vibrating wheel, a rotating shaft base outer ring of the angle grinder body is connected with the vibrating support, the vibrating support is connected with the bolt in a threaded mode, and the bolt is provided with a threaded section and a positioning section in the axial direction. The positioning section is inserted into a scraper knife base, the scraper knife base is provided with a positioning hole matched with the positioning section, the scraper knife base is provided with a vibration cavity used for being matched with a vibration wheel, the vibration wheel is located in the vibration cavity, the vibration wheel strikes the cavity wall of the vibration cavity when rotating, a vibration column is arranged on the surface of the scraper knife base, and the vibration column of the scraper knife base is inserted into a semicircular scraper knife. The vibration column transmits vibration striking from the vibration wheel to the semicircular scraper knife.