514 results about "Hammer drill" patented technology

A hammer drill/driver with a motor having an output member, a planetary transmission, a clutch assembly and a clutch bypass. The planetary transmission, which includes a ring gear, receives rotary power from the output member and produces a rotary output. The clutch assembly has a clutch profile, which is coupled to the ring gear, and a first pin assembly having a first follower, a first pin member and a first spring that biases the first follower into contact with the clutch profile. The clutch bypass has a bypass profile, which is coupled to the ring gear, and second pin assembly having a second follower, a second pin member, a third spring, which biases the second follower away from the bypass profile, and a fourth spring, which biases the second follower away from the second pin member. A method for operation of a hammer drill/driver is also provided.

A hammer drill (1) includes a lock plate (35) forward of a boss sleeve (13) and a swash bearing (14) which cooperates with the boss sleeve to convert the rotation of an intermediate shaft (5) on which the boss sleeve is mounted. The lock plate is mounted on the boss sleeve and selectively engages claws (23) of the boss sleeve (13) in a manner that permits its integral rotation with and axial slide with respect to the boss sleeve. The lock plate is additionally biased in the forward direction by a coil spring (38) so that when a clutch (19) is shifted forward in a drill mode, the lock plate also moves forward into engagement with a stopper (39) secured to an inner housing (4), preventing inadvertent rotation of the boss sleeve.

A percussion hammer drill and/or percussion hammer that can be guided by a handgrip comprises a pneumatic spring striking mechanism with a reciprocating drive piston and with a percussion piston that can be operated by the drive piston. A cavity for accommodating a pneumatic spring is provided between the drive piston and the percussion piston. The cavity can be connected to the surrounding area via a no-load operation channel in order to achieve a no-load operation. This this end, a valve is situated inside the no-load operation channel and can be controlled according to an application force that can be applied to the handgrip by the operator.

A hammer drill (2) includes a clockwise and counterclockwise driven tool spindle (28), a drive pinion (70) operatively connectable with the tool spindle (28) for transmitting a torque thereto, a separate control handle (6) for selecting one of the hammer drill functions including a pure drilling operation, a pure percussion operation, and a rotary-percussion operation), and a switching device (8) which is adjustable in accordance with a position of the control handle (6) and which is shiftable by the control handle (6) in a clockwise rotation position for effecting a pure drilling operation in a clockwise direction and in a counterclockwise rotation position for effecting a pure drilling operation in a counterclockwise direction.

When the mode change knob of a multi-mode hammer drill is moved to the hammer only position, an electronic sensor sends a signal to a control logic circuit. When the user then depresses the trigger mechanically closing the ON/OFF switch, the control logic circuit applies a voltage either to a holding relay or to the gate of a triac which enables the relay or triac to conduct, thus providing a parallel circuit by-passing the ON/OFF switch. Consequently, when the user releases the trigger and opens the ON/OFF switch, the parallel relay or triac maintains current flow to the motor. It can be seen that in hammer only mode the user can activate the hammer drill by simply tapping the trigger to depress it and does not need to hold down trigger during use of the hammer in operation.

The invention relates to a multifunctional percussion drill which is mainly used for drilling into basement rocks, comprising a chassis control chamber, a host machine of a drilling machine and a mast. The mast is provided with a mounting bracket, a wire rope, and an overhead travelling crane and a multilayer hollow sealed telescopic drill rod which are arranged at the top of the mast. The mast body is provided with a deslagging cock and comprises a power device of an impacting device arranged on a chassis, a plurality of pipelines and a pipeline winch fixed on the mast, wherein, the pipelines are communicated with the inner cavity of the drill rod through the winch device and can extend along with the extending of the drill rod; the mast body also comprises at least one power transmitting pipeline communicated with the power device of the impacting device, at least one pollution discharging and deslagging pipeline, one positive pressure maintaining pipeline and a power head arranged on the mast of the drill, wherein, the impacting device communicated with the power transmitting pipeline is connected at the bottom part of the drill rod at the innermost layer by transition joints, and the power head drives the drill rod to force the impacting device to swing for working. The drill can effectively improve the working efficiency, conveniently and fast transform functions, and walk.

A wedge anchor driver comprising: a first member having a first opening configured to fit onto the nut of a wedge anchor and a second opening configured to receive a predetermined length of the outer end of the wedge anchor's bolt; and a second member associated with the first member, wherein the second member's distal end is configured to fit, and be lockable, into the chuck of a hammer drill, such that, after the wedge anchor driver is locked into the chuck of the hammer drill, a user can drive the wedge anchor into a corresponding hole with the hammer drill in hammer mode and then tighten the nut of the wedge anchor by switching the hammer drill from hammer mode to drill mode.

A hammer drill comprising a body (2) containing an electric motor (4) for driving an output (6) of the drill is disclosed. A vibration transducer (12) senses vibrations generated by the motor and produces a vibration signal dependent upon the sensed vibrations. An electronic module (10) includes a controller (10a) for controlling the rotational speed of the motor, and a signal processor (10b) for receiving the vibration signal from the vibration transducer, determining the rotational speed of the motor based on the vibration signal, and providing an output signal to the controller to cause the controller to control the rotational speed of the motor.

A mechanism for drilling or coring by a combination of sonic hammering and rotation. The drill includes a hammering section with a set of preload weights mounted atop a hammering actuator and an axial passage through the hammering section. In addition, a rotary section includes a motor coupled to a drive shaft that traverses the axial passage through the hammering section. A drill bit is coupled to the drive shaft for drilling by a combination of sonic hammering and rotation. The drill bit includes a fluted shaft leading to a distal crown cutter with teeth. The bit penetrates sampled media by repeated hammering action. In addition, the bit is rotated. As it rotates the fluted bit carries powdered cuttings helically upward along the side of the bit to the surface.

A suction device (11) for a hammer drill (6) has a first end (12) with a securing device (14) for securing the suction device (11) to the hammer drill (6) and a second end (13) opposite first end (12) and which has a contact area (15) with which the suction device (11) contacts a constructional component, the suction device (11) further having a receiving space (20) which at least partially encloses a working tool (7) of the pick power tool (6), and being provided with a connection device (18) for a vacuum source. A retaining element (21) having a through-opening (22) for the working tool (7) and a plurality of suction openings (23) is provided in an area (19) of the second end (13).

The invention relates to a pneumatic percussive tool for a paving breaker and/or a hammer drill comprising a drive piston which is displaceable both backwards and forwards by a crankshaft and arranged in a percussion piston which is displaceable both backwards and forwards. A hollow chamber is connected to a compensating chamber by an idling air channel and embodied between the drive piston and the percussion piston in order to receive a pneumatic spring. A valve is arranged in the idling air channel, the opening and closing position thereof depending on the rotational speed of the crankshaft. If the rotational speed of the crankshaft falls below a predetermined value, the valve opens the connection between the hollow chamber and the compensating chamber so that a pneumatic spring can no longer be to embodied in the hollow chamber and the pneumatic percussion tool is placed in a idling position.

A hammer drill has a transmission housing 280 is formed from two clamshell halves of durable plastics or cast metal material. The transmission housing 280 is mounted on first and second damping springs 284 and 286 at its rearward end. The transmission housing 280 is also mounted on parallel rails (not shown) disposed within the tool housing 222 such that the transmission housing 280 can slide a small distance relative to the tool housing 222. The forward end of the transmission housing 280 has a generally part conical portion 290, which abuts a corresponding part conical portion 292 formed on the tool housing 222. The interface defined by conical portions 290 and 292 defines a stop against which the transmission housing 280 rests against the tool housing 222 in the inoperative condition of the hammer drill 220. When the hammer drill 220 is being used, a gap opens up between the conical surfaces 290 and 292 which helps to damp axial and lateral vibrations that would otherwise be transmitted from the tool bit (not shown) to the user. However, the gap is sufficiently small that the hammer drill 220 and the transmission housing 280 can still be adequately controlled by the user, and the part conical shape of the interface also assists in aligning the transmission housing 280 with the tool housing 222 in order to give a user greater control over the direction of the tool bit.

A hammer drill comprising: a body 2 in which is mounted a motor 48 and a hammer mechanism 46 which is driven by the motor 48 when the motor 48 is activated; a tool holder 8 mounted on the front of the body 2 and which is capable of holding a cutting tool 12, the hammer mechanism 46, when driven by the motor 48, capable of imparting impacts to the cutting tool 12, when held by the tool holder 8; a rear handle 4, moveably mounted on to the rear of the body 2 via at least one movement control mechanism and which is capable of moving towards or away from the body 2; a biasing mechanism 104 which biases the rear handle 4 away from the body 2; wherein each movement control mechanism comprises: a first mount; a rod 106, having a longitudinal axis 107, rigidly connected at one of it ends to the first mount; a second mount which slidingly engages with the rod 106 at two distinct points only along its length to allow the rod 106 to slide relative to the second mount in a direction parallel to the longitudinal axis 107 whilst preventing the rod 106 from moving relative to second mount in a direction perpendicular to longitudinal axis 107; wherein one mount 70, 133, 136 is attached to the body 2 and the other mount 92 is attached to the rear handle 4.

A hammer drill (10), consisting of a housing (12), accommodating the parts mentioned below and assembled in particular from half shells (13, 14), a motor (16) with an on/off switch (18) and with a motor shaft (22) with motor pinion (24), a gear unit (26) with an intermediate shaft (28), with a drive gear (30), with a splined driving shaft (32), with a shifting sleeve (34) and with an output gear (35), a percussion mechanism (36), in particular with a wobble plate (40), with a wobble gear (38) with wobble finger (42), and with a percussion element (44), an output shaft (46) with a drive gear (48), and a drill chuck (50), wherein the motor (16) meshes with the drive gear (30) of the intermediate shaft (28) via its motor pinion (24), wherein the rotary driving of the wobble plate (40) with the intermediate shaft (28) can be set or stopped via coupling or release of the shifting sleeve (34), in particular with the splined driving shaft, preferably by displacing with shifting means (52), and wherein the rotary driving of the output shaft (46) with the intermediate shaft (28) can be set or stopped via separate means, in particular independently of the shifting sleeve (34), can be produced cost-effectively and works at a high efficiency by virtue of the fact that a second shifting sleeve (134) serves to set the rotation of the output shaft (46), said shifting sleeve (134) enclosing the splined driving shaft (32) and/or the output gear (35) in a positive-locking and axially displaceable shiftable manner.

A drill in particular for a hammer drill for drilling in stone, concrete and the like includes a drilling head (2) formed as a hard material body with radial legs (18,19) and having at least three radially extending cutting bits (5) formed on the radial legs (18,19), and a centering tip (11;21) provided in a center of the hard material body and projecting beyond one of the cutting bits (16,17), with the centering tip (11;21) having concave limiting surfaces (12;22) stretching between the linearly extending auxiliary cutting edges (13;24,24).