Abrégé

A dual-purpose drill chuck (22) and an electric hammer drill (20) using the dual-purpose drill chuck (22). Inside of the dual-purpose drill chuck (22) is hollow; the front is a keyless or wrench type drill chuck; the back stretches, the inner wall has a key matched with the open slot of an electric hammer drill head (21), and a straight pin (32) radially penetrating the wall of the drill chuck (22); the back end is a connecting part sleeve-connected with a rotation sleeve (39) of the electric hammer drill (20), the corresponding part of the connecting part relative to the rotation sleeve (39) may be a receiving part or an insertion part, the connecting part has a fixed connecting device; the fixed connecting device is a steel ball (28), two steel ball holes are opened on the outer layer tube wall of the sleeve-connected position of both the drill chuck (22) and the rotation sleeve (39), an annular groove for fixing the steel ball (22) is at the position corresponding to the corresponding inner layer tube wall, and the steel ball (22) penetrates the two steel ball holes and enters the annular groove. The electric hammer drill using the dual purpose drill chuck is convenient and comfortable for operation, rapid for mounting and dismounting of drill chuck, high in punching precision and higher processing efficiency.

Classes IPC  ?

• B23B 45/02 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet entraînées électriquement
• B23B 45/16 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet avec une action de percussion superposée
• B25D 17/08 - Dispositifs de fixation et de guidage des têtes d'outils, p. ex. des mandrins
• B25D 17/00 - Parties constitutives ou accessoires d'outils portatifs à percussion actionnés mécaniquement

Abrégé

A novel electric hammer comprises a machine body (23). A drive motor, a gear transmission mechanism, a rotary sleeve (39), and an impact mechanism (42) are mounted in the machine body. The drive motor is connected to an input end of the gear transmission mechanism. An output end of the gear transmission mechanism is connected to the rotary sleeve (39). The electric tool further comprises a drill chuck (22). The drill chuck (22) is hollow. The drill chuck (22) is mounted on the rotary sleeve (39) through a fixing connecting device. The drill chuck (22) is provided with a through hole that an electric hammer bit runs through. The electric hammer bit is mounted in the rotary sleeve (39). The impact mechanism (42) is located behind the electric hammer bit. An outer wall of the drill chuck is provided with a holding member for holding the electric hammer bit. The novel electric hammer makes operation convenient and comfortable, makes hole-boring precise high, and is a novel electric hammer with high processing efficiency.

Classes IPC  ?

• B23B 45/16 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet avec une action de percussion superposée
• B25D 16/00 - Machines portatives à percussion avec rotation superposée

Abrégé

A self-locking device of an electric hammer is disclosed. The self-locking device comprises a clamping member (1), a cylinder sleeve (3), a gear reducer (2) which is fixedly connected with the clamping member (1), a driven bevel gear (4) which matches with a driving bevel gear, and a knob shaft (5). The front end of the cylinder sleeve (3) is provided in the clamping member (1). The terminal of the cylinder sleeve (3) is provided in the gear reducer (2). The driven bevel gear (4) is provided in the gear reducer (2). The driven bevel gear (4) can ratably sleeve on the terminal of the cylinder sleeve (3) without axially moving. The self-locking device of the electric hammer also comprises a positioning mechanism. The positioning mechanism comprises a positioning element (62) and a topping sheet (61). The positioning element (62) comprises a positioning body (620), a positioning shifting sheet (623), and an elastic collar (624). The gear reducer (2) is provided with the knob shaft (5) which is used for adjusting the gears of an electric hammer. The end face of the knob shaft (5) is provided with an eccentric head (51) which is used for pushing the positioning shifting sheet (623) to move. The invention can ensure that only the chiseling is performed without any rotation when the electric hammer is used for the 'chiseling' gear, and has the advantage of good self-locking performance and can free adjust the angle of the tool when necessary.

Classes IPC  ?

• B25D 16/00 - Machines portatives à percussion avec rotation superposée
• B23B 45/16 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet avec une action de percussion superposée

Abrégé

A light single button multi-function electric hammer comprises a body, a motor, a rotation set assembly (1), a cylinder assembly (6), a torque spring (2), a knob (26), a gearwheel and a transmission mechanism of torque clutch. The transmission mechanism of torque clutch comprises a pinion (7), a gear clutch (8), a middle shaft (10), a hammer crosspiece clutch (9), a swing rod bearing (11) and a primary gear (12). The pinion is movably fitted with the middle shaft; the pinion meshes the large end teeth of the gearwheel and matches with the inner teeth of the gear clutch. The gear clutch meshes the small end teeth of the gearwheel and is fitted with the teeth shaft of the middle shaft. The gear clutch and the hammer crosspiece clutch are movably fitted with the teeth shaft of the middle shaft. The swing rod bearing is movably fitted with the middle shaft and is connected with the cylinder assembly through the swing rod. Matched concavo and convex slots are set on the hammer crosspiece clutch and swing rod bearing. The primary gear is tightly fitted with the middle shaft. The knob is connected with an operating mechanism linked to the large teeth end of the gearwheel, the gear clutch and the hammer crosspiece clutch. The electric hammer enables a simple and compact structure, flexible and convenient conversion, low cost, safe and reliable use.

Classes IPC  ?

• B25D 16/00 - Machines portatives à percussion avec rotation superposée

Abrégé

A heavy double-button type multifunctional electric hammer includes a hammer body, a driving motor, a rotating sleeve group, a connecting rod subassembly and a torque spring; the electric hammer also includes a multifunctional transmission mechanism and an operating mechanism. The multifunctional transmission mechanism includes a first wheel, a first wheel clutch, a second wheel, a third wheel, an intermediate shaft, a forth wheel, a forth wheel clutch, a fifth wheel, a fifth wheel clutch, a small bevel gear, a large bevel gear, a torque clutch, an eccentric shaft and an eccentric shaft spring. The output shaft of the driving motor is connected with the first wheel and the second wheel; a small bevel gear is installed on the small bevel gear shaft; the small bevel gear is engaged with the large bevel gear; the big bevel gear is sleeved on the rotating sleeve group; the big bevel gear is matched with the torque clutch; the fourth wheel clutch, the fifth wheel clutch and the first wheel clutch are all connected with the operating mechanism. The heavy double-button type multifunctional electric hammer has the advantages of simple and proper structure, flexible and convenient transmission, low cost, safe and reliable usage.

Classes IPC  ?

• B25D 16/00 - Machines portatives à percussion avec rotation superposée
• B25D 17/00 - Parties constitutives ou accessoires d'outils portatifs à percussion actionnés mécaniquement

Abrégé

An electric tool with a transmission mechanism includes a rotating mechanism, a percussion mechanism, a rapid shifting mechanism and a main spindle locking mechanism. The rotating mechanism, the percussion mechanism and the rapid shifting mechanism are all assembled in a chamber formed by a reduction gearbox (1) and an intermediate cover (10), and an armature shaft, an intermediate shaft and a main spindle (17) are arranged in the chamber. The high-speed and low-speed gears are axially and separately mounted on the intermediate shaft, while a clutch (14), a high-speed driven gear and a low-speed driven gear are mounted on the main spindle. The high-speed gear is engaged with the high-speed driven gear, the low-speed gear is engaged with the low-speed driven gear, and the clutch is axially and removably mounted on the main spindle. A drive pin (16) is assembled on the clutch which is between the high-speed and the low-speed driven gear.

Classes IPC  ?

• B25D 11/00 - Outils portatifs à percussion entraînés par moteur électrique

Abrégé

A quick clamping device of an electric hammer includes a chuck connecting rod for installing a hammer chuck or a drill chuck, a rotary sleeve (21), a switch sleeve (15) and a reduction box (19). The rotary sleeve (21) is accommodated in the switch sleeve (15) and the reduction box (19). The chuck connecting rod is installed in the rotary sleeve (21) through splines. The rotary sleeve (21) is provided with steel balls (17). The inner sides of the steel balls (17) butt against the steel ball grooves of the chuck connecting rod, and the outer sides of the steel balls (17) contact with the steel ball retaining ring (16). The steel ball retaining ring (16) is accommodated in the switch sleeve (15). The quick clamping device of an electric hammer is convenient and quick to replace and improves the drilling precision.

Classes IPC  ?

• B25D 17/08 - Dispositifs de fixation et de guidage des têtes d'outils, p. ex. des mandrins
• B23B 45/16 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet avec une action de percussion superposée

Abrégé

A connecting rod for an electric hammer comprises a rod body (3); the front end of the rod body (3) is provided with an outer thread section; the rear end of the rod body (3) is provided with steel ball grooves; the outer thread section is fixedly connected with the front end of a drill chuck (2). By the connecting rod of the invention, the electric hammer can have more functions and is convenient in use.

Classes IPC  ?

• B25F 3/00 - Associations d'outils pour différents travaux avec un seul moyen d'entraînement mécanique portatifRaccords appropriés