1892results 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.

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 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 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.

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 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.

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 box-type transformer substation production, in particular to a handheld box-type transformer substation appearance polishing device. Comprising a driving part which is provided with a rotatable driving wheel; the fixing frame is fixedly connected with the driving part, and a rotatable first driven wheel is arranged at the outer end of the fixing frame; the movable frame is arranged on the fixed frame in a swinging manner, and a rotatable second driven wheel is arranged at the outer end of the movable frame; the clamping assembly is arranged between the fixed frame and the movable frame; and the polishing belt is arranged on the peripheries of the driving wheel, the first driven wheel and the second driven wheel in a sleeving manner. The clamping assembly comprises a first connecting part connected with the fixing frame; the second connecting part is connected with the movable frame; the connecting buckle is buckled with the first connecting part, and a connecting column is arranged at one end of the connecting buckle; the operating part is arranged on the second connecting part in a swinging manner; and the connecting shaft is rotatably arranged on the operating part, and the connecting shaft is connected with the connecting column. The polishing device can polish the appearance of the box-type substation.

The utility model relates to a wall surface polishing device for constructional engineering, which comprises a main body, a polishing assembly and a dust collection assembly, and the main body is provided with a mounting sleeve and a side plate; the grinding assembly comprises a supporting roller shaft and a transmission roller shaft and is arranged on the side, away from the side plate, of the body. The grinding belt sleeves the outer sides of the supporting roller shaft and the transmission roller shaft; and the motor is arranged on the main body and is in transmission with the transmission roller shaft. According to the wall corner polishing device, wall corners are polished on the basis of the polishing belts arranged in a multi-angle surrounding mode, polishing dead angles do not exist, a user does not need to polish the wall corners independently in the later period, and working efficiency is high; and based on the arrangement of the telescopic air rods and the walking wheels, the main body and the grinding assembly are supported, manual lifting by a user is not needed, labor is saved in operation, and long-time operation can be conducted.

A clip-on guard assembly for a tool guard is disclosed. The tool guard provides shielding for a tool, and the clip-on guard assembly can be detachably mounted to the tool guard to provide additional shielding coverage for the tool. The clip-on guard assembly can include a guard cover that provides shielding coverage, first and second fasteners disposed on opposite ends of the guard cover, a lever pivotably mounted to the guard cover, and a locking member configured to releasably lock the lever in place when the guard is in use. In operation, the first fastener can be fitted onto one end of the tool guard. Pivoting the lever can move the second fastener into engagement with the opposite end of the tool guard, allowing an operator to securely attach the guard cover to the tool guard, thereby providing modified shielding coverage for the tool. Pivoting the lever in the opposite direction can move the second fastener away, allowing the clip-on guard assembly to be detached from the tool guard.

The utility model belongs to the technical field of grinding and cutting, and particularly relates to a plane grinding and cutting device. The plane grinding and cutting device comprises a grinding and cutting tool head, a fixed protective cover, a movable protective cover and an elastic piece. The grinding and cutting tool head is used for grinding or cutting a workpiece; the fixed protective cover covers the grinding and cutting tool head; the movable protective cover is connected to the fixed protective cover and can move in the axial direction of the fixed protective cover, and a supporting face is formed at the bottom of the movable protective cover and used for making contact with the surface of a workpiece. One end of the elastic piece is connected with the fixed protective cover, the other end of the elastic piece is connected with the movable protective cover, and the elastic piece is configured to be shrunk when the supporting face is close to the grinding and cutting tool head. By means of the plane grinding and cutting device in the technical scheme, it can be guaranteed that the surface of a workpiece is trimmed to be flat and smooth, the situation that a grinding and cutting tool head is stuck is not likely to happen, and therefore the probability of production failures is reduced, and personal injuries caused by improper use of the device are reduced.

The utility model discloses a device for processing a hook spring workpiece, the hook spring is a C-shaped structural member formed by folding a steel belt and stamping, the device comprises a bottom plate, a workpiece positioning seat and a support frame, the workpiece positioning seat and the support frame are arranged on the bottom plate, the workpiece positioning seat is used for accommodating and fixing the hook spring workpiece, and the support frame is used for supporting the hook spring workpiece. The supporting frame is movably connected with the bottom plate through a rotating shaft, an angle grinder is fixedly installed on the supporting frame, the supporting frame is pulled by hand to make the supporting frame move around the shaft relative to the rotating shaft, the angle grinder can be driven to move, the angle grinder gradually gets close to the workpiece positioning base, and then the periphery of a grinding wheel is used for conducting cutting type grinding on the tail end of a hook spring workpiece. The tail end of the hook spring workpiece can be quickly and accurately processed, and the processed end face is very smooth, so that the processing efficiency and the processing precision are greatly improved, and the abrasion to a grinding wheel is reduced.

The invention discloses a flexible grinding tool for the inner wall of an aviation conduit, and belongs to the technical field of inner surface treatment of aero-engine conduits. The tool comprises a flexible pipeline, a variable-diameter polishing head and an inflatable airbag, the variable-diameter grinding head comprises an elastic grinding ball body, a grinding material layer is arranged on the elastic grinding ball body, the inflatable air bag inflates the elastic grinding ball body through the flexible pipeline, the elastic grinding ball body expands and expands to open the grinding material layer, and the grinding material layer is attached to the outer contour grinding face of the elastic grinding ball body; the variable-diameter grinding head can expand in the radial direction after entering the guide pipe, and the requirement for grinding the inner walls of aviation guide pipes with different inner diameters is met. The tool has the advantages of being compact in structure, flexible to operate, wide in application range, uniform in grinding effect and the like, is suitable for deburring, polishing and other processes of the inner wall of a complex bent guide pipe in an aero-engine, and effectively improves the grinding quality and efficiency.

The invention relates to the field of angle grinders, and discloses a high-performance angle grinder which can be used for cutting a pipeline and comprises a supporting ring, a cutting mechanism is rotationally arranged on the front face of the supporting ring, and the supporting ring is located on the outer side of the pipeline; and the three sets of clamping mechanisms are circumferentially distributed on the outer surface of the pipeline at equal intervals, and each clamping mechanism comprises a telescopic rod fixedly connected to the back face of the supporting ring. The device does not generate rigid pressure on the pipeline, at the moment, due to the fact that the containing cylinder continues to move towards the pipeline and continuously stretches the spring, resilience force is generated and acts on the piston, and the piston can generate continuously-increasing flexible pressure on the middle portion of the clamping arc plate and the middle portion of the attaching pad; by means of the design, the clamping arc plates and the attaching pads can be kept to be fully attached to the pipeline, too large rigid pressure cannot be generated on the outer surface of the pipeline, and the outer surface of the pipeline is effectively protected.

The utility model relates to the technical field of paint surface polishing, in particular to a paint coating dull polish machine which comprises a dull polish machine body, a plurality of elastic telescopic assemblies are arranged on a rotating shaft of the dull polish machine body, rotating assemblies are arranged on the elastic telescopic assemblies in a rotating mode, and the rotating assemblies are vertically arranged on the elastic telescopic assemblies. A grinding wheel is inserted into the bottom of each rotating assembly, and a guide assembly which is matched with the rotating assemblies to enable the grinding wheels to form revolution, autorotation and reciprocating sliding is arranged at the bottom of the grinding machine main body; by arranging the elastic telescopic assembly, the rotating assembly and the guiding assembly, the multiple grinding wheels can be controlled to rotate and slide in a reciprocating mode while revolution is conducted, the contact frequency and the cutting angle of the grinding wheels and the surface of a workpiece can be greatly increased, and the material removal rate within unit time is remarkably increased; the device is particularly suitable for rapid treatment of large-area or complex curved-surface workpieces, repeated grinding procedures are reduced, chippings can be thrown out from the bottom, and accumulated chippings in a machining area can be rapidly removed.

The invention provides a belt type grinding machine. The belt sander includes: a motor that is driven by power supplied from a battery; a storage battery mounting part relative to which the storage battery can be mounted and dismounted; a belt drive unit that includes a drive roller that rotates by the driving force of the motor, a driven roller, and a belt that is bridged between the drive roller and the driven roller and that has a polishing surface that polishes an object to be processed; a housing having a motor housing part for housing the motor; and a handle configured to surround at least a portion of the battery mounted on the battery mounting portion.

A water turbine head cover additive and subtractive repairing device and method. The device comprises a rotation bearing platform, a connecting arm, a moving frame and a machining device; the rotation bearing platform comprises a base and a rotating seat mounted on the base, a driving device being mounted on the base, and an output shaft of the driving device being in driving connection to the rotating seat; one end of the connecting arm is connected to the rotating seat, and the other end of the connecting arm is connected to the moving frame; a lifting / lowering plate is mounted on the moving frame, a sliding table assembly and a measuring system being mounted on the upper side of the lifting / lowering plate; a revolving seat is mounted on the upper side of the sliding table assembly, the machining device being detachably mounted on the revolving seat. The rotation bearing platform drives the moving frame to rotate, and the machining device is mounted on the moving frame and can be replaced with a different machining device to machine a head cover, thus achieving good repairing quality and high precision. Replacing humans with machinery decreases the labor intensity of workers, improves working environments, and greatly reduces the safety risk of human operations.

The invention discloses a grinding piece, and relates to the technical field of grinding pieces, the grinding piece comprises a base body layer and a wear-resisting layer, the wear-resisting layer comprises wear-resisting pieces and supporting blocks which are alternately distributed, and the wear-resisting pieces and the supporting blocks are directly installed on the base body layer; the wear-resisting layer is composed of the wear-resisting piece and the supporting block which are installed on the base body layer, the supporting block can support the wear-resisting piece from the side direction of the wear-resisting piece, and therefore the tangential stress bearing capacity of the wear-resisting piece is improved, the overall hardness and toughness of the grinding face are guaranteed, and the grinding face is not prone to cracking or cracking or other defects. Meanwhile, the wear-resistant layer is detachably mounted on the base body layer, so that the wear-resistant layer can be independently replaced in a conventional state, the base body layer is reserved, and more cost is saved; and in addition, during use, the wear-resisting unit can abut against the interior of the mounting groove by inertia or friction force and cannot fall off.