Electric hammer

Abstract

The utility model discloses an electric hammer which comprises a motor, an impact device, a rotating device and a knob device, the motor is respectively connected with the impact device and the rotating device, the knob device comprises a hammer drill switching deflector rod, a knob and a state locking mechanism, and the hammer drill switching deflector rod cuts off or connects the motor and the impact device. A rotary gear and an impact rotary gear are switched through the hammer drill switching deflector rod, the hammer drill switching deflector rod is controlled through the rotary knob, the switching rod achieves switching of the adjusting gear and the impact gear by means of the stroke of the hammer drill switching deflector rod, and the hammer drill switching deflector rod is connected with the rotary knob and the state locking mechanism to lock or unlock the rotary knob. The knob locks the target gear position through the state locking mechanism during gear switching, the overall structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of electric hammers and relates to an electric hammer. Background Art

[0002] Electric hammers are popular among users because they integrate functions such as hammer drill, electric drill and electric pick, but how to realize the conversion of various functions has always been a difficulty of electric hammers. At present, the conversion of various functions of electric hammers is realized by using a single knob 52, but the structure for switching various gears is complicated. Summary of the invention

[0003] In order to overcome at least one deficiency of the prior art, the utility model provides an electric hammer.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electric hammer, including a motor, an impact device, a rotating device and a knob device, the motor is connected to the impact device and the rotating device respectively, the knob device includes a hammer drill switching lever, a knob and a state locking mechanism, the hammer drill switching lever cuts off or connects the connection between the motor and the impact device, the knob is fixedly connected to the hammer drill switching lever, and the state locking mechanism locks or unlocks the knob.

[0005] Furthermore, it includes a shell, the motor, impact device, and rotating device are arranged in the shell, the shell is provided with a knob groove, the knob device is rotatably arranged in the knob groove, and the shell is provided with rotation gear mark, impact rotation gear mark, adjustment gear mark and impact gear mark distributed on the outer circle of the knob groove.

[0006] Furthermore, the impact device includes a transmission wheel, a turntable, an eccentric structure and a rocker. The transmission wheel is meshed and connected with the output wheel fixed to the motor output shaft. The eccentric structure includes an eccentric disk and a rotating shaft. One end of the rocker is rotatably connected to the eccentric disk, and the other end of the rocker is connected to the impact mechanism of the electric hammer. The transmission wheel is meshed and connected with the output wheel and linked with the turntable. The turntable is connected to the rotating shaft, and the two move synchronously.

[0007] Furthermore, the turntable is provided with a clamping block, and the transmission wheel is provided with a clamping slot matching the clamping block. The clamping block is clamped into the clamping slot to connect the turntable and the transmission wheel, and the two move synchronously. The clamping block is disengaged from the clamping slot to cause the turntable to be disengaged from the transmission wheel.

[0008] Furthermore, the rotating device includes a rotating gear, a rotating bevel gear and a driven wheel, the rotating gear is meshedly connected with the output wheel fixed to the output shaft of the motor, the rotating bevel gear and the rotating gear are fixed on the same axis, and the rotating bevel gear is meshedly connected with the driven wheel.

[0009] Furthermore, it includes an impact mechanism and a rotating mechanism, the impact mechanism is connected to the impact device, the rotating mechanism and the rotating device are linked through a rotating switching device, the rotating switching device is arranged between the driven wheel and the rotating mechanism, the rotating switching device is connected to the rotating mechanism, the two rotate synchronously, and the rotating switching device is linked to the driven wheel.

[0010] Furthermore, the rotation switching device includes a ring block, which is connected to the rotation mechanism and is provided with a fixing groove. The fixed block provided on the driven wheel is clamped in the fixing groove to connect the ring block to the driven wheel, and the fixed block is disengaged from the fixing groove to disconnect the ring block from the driven wheel.

[0011] Furthermore, it includes a fixed block and a sliding block, wherein the fixed block is fixedly connected to the inner wall of the shell, the sliding block is slidably connected to the fixed block, and a rotation limit is set between the two. The ring block is in a first position, the ring block is located between the driven wheel and the sliding block, and the ring block is in a second position, the ring block is engaged with the sliding block, and the rotation of the ring block is locked.

[0012] Furthermore, it also includes a switching rod, which is connected to the knob device and the rotation switching device. The switching rod is linked with the ring block to connect or disconnect the ring block with the driven wheel.

[0013] Furthermore, the state locking mechanism includes a movable part and a fixed part, the fixed part is fixed in the knob groove, the movable part is connected to the knob, the two rotate synchronously, and the movable part is locked or unlocked with the fixed part.

[0014] In summary, the utility model is beneficial in that:

[0015] The utility model switches the rotary gear and the impact rotary gear through the hammer drill switching lever. The hammer drill switching lever is controlled by a knob. The switching rod uses the stroke of the hammer drill switching lever to realize the switching of the adjustment gear and the impact gear. When the knob switches the gear, the state locking mechanism locks the target gear position. The overall structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an electric hammer of the present utility model.

[0017] Figure 2 It is a schematic diagram of the partial internal structure of the electric hammer of the utility model.

[0018] Figure 3 It is a schematic diagram of the exploded view of the impact device of the present utility model.

[0019] Figure 4 It is a schematic diagram of the hammer drill switching lever of the utility model.

[0020] Figure 5 It is a structural schematic diagram of the electric hammer of the utility model in the impact rotation gear position.

[0021] Figure 6 This is a structural schematic diagram of the electric hammer of the utility model in the rotating gear position.

[0022] Figure 7 This is a schematic diagram of the electric hammer of the utility model in the adjustment gear structure.

[0023] Figure 8 This is a schematic diagram of the structure of the electric hammer of the utility model in the impact gear position.

[0024] Fig. 9 It is a schematic diagram of the local structure of the shell of the utility model.

[0025] Fig.10 This is a schematic diagram of the exploded view of the knob and movable parts of the utility model.

[0026] Fig.11 This is a schematic diagram of the assembly of the knob and movable parts of the utility model. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0029] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0031] Embodiment 1:

[0032] like Figure 1-11As shown, an electric hammer comprises a housing 1 and a motor, an impact device 2, an impact mechanism (not shown), a rotating device 3, a rotating mechanism (not shown), a rotation switching device and a knob device 5 located in the housing 1. The knob device 5 comprises a hammer drill switching lever 51, a knob 52 and a state locking mechanism. The motor is respectively connected to the impact device 2 and the rotating device 3, the impact mechanism is connected to the impact device 2, the hammer drill switching lever 51 cuts off or connects the connection between the motor and the impact device 2, the rotation switching device cuts off or connects the connection between the rotating mechanism and the rotating device 3, and the state locking mechanism locks or unlocks the knob 52.

[0033] The electric hammer also includes an impact mechanism (not shown in the figure) and a rotating mechanism (not shown in the figure). The impact device 2 is connected to the impact mechanism, and the motor transmits power to the impact mechanism through the impact mechanism to achieve impact. The rotating device 3 is connected to the rotating mechanism, and the motor transmits power to the rotating mechanism through the rotating device 3 to achieve rotation. In this embodiment, the impact mechanism and the rotating mechanism are actuators, and the impact mechanism and the rotating mechanism are started at the same time to achieve the impact rotation function of the electric hammer. When the impact mechanism fails, the rotating mechanism is started to achieve the rotation function of the electric hammer. When the impact mechanism is started, the rotating mechanism fails to achieve the impact function of the electric hammer. The impact mechanism is started, and the rotating mechanism fails to achieve the impact function of the electric hammer. The impact device 2 and the rotating device 3 are transmission structures between the actuator and the motor.

[0034] The impact mechanism includes an impact rod. The impact mechanism, the impact rod and the rotating mechanism are conventional structures of an electric hammer. The present application does not make any improvements to the structures and functions of the impact mechanism, the impact rod and the rotating mechanism.

[0035] To facilitate the definition of direction, as shown in the figure, the impact direction of the electric hammer is set in the direction of arrow x in this embodiment, that is, the axial direction of the impact rod.

[0036] The housing 1 is provided with a knob groove (not shown), the knob device 5 is rotatably arranged in the knob groove, and the housing 1 is provided with a rotation gear mark 11, an impact rotation gear mark 12, an adjustment gear mark 13 and an impact gear mark 14 distributed on the outer ring of the knob groove. Figure 1 As shown, the rotation gear mark 11, the impact rotation gear mark 12, the adjustment gear mark 13 and the impact gear mark 14 are distributed in a clockwise direction. When the knob device 5 is located at the rotation gear mark 11, the electric hammer performs a rotation operation. At this time, the electric hammer is in the rotation gear. When the knob device 5 is located at the impact rotation gear mark 12, the electric hammer performs impact and rotation operations. At this time, the electric hammer is in the impact rotation gear. When the knob device 5 is located at the adjustment gear mark 13, the direction of the tool used by the electric hammer is manually adjusted. At this time, the electric hammer is in the adjustment gear. When the knob device 5 is located at the impact gear mark 14, the electric hammer performs an impact operation. At this time, the electric hammer is in the impact gear. When the gear switching is required, the knob 52 is rotated to the corresponding mark position and the knob 52 is locked in this position through the state locking mechanism.

[0037] The output shaft of the motor is fixedly provided with an output wheel 4, and the output wheel 4 is respectively connected to the impact device 2 and the rotating device 3 to realize power transmission.

[0038] The impact device 2 includes a transmission wheel 20, a turntable 21, an eccentric structure 24 and a rocker 25. The eccentric structure 24 includes an eccentric disk 241 and a rotating shaft 242. One end of the rocker 25 is rotatably connected to the eccentric disk 241, and the other end of the rocker 25 is connected to an impact rod (not shown). The transmission wheel 20 is meshed and connected to the output wheel 4 and linked to the turntable 21. The turntable 21 is connected to the rotating shaft 242, and the two move synchronously. The motor drives the transmission wheel 20 to rotate through the output wheel 4. The transmission wheel 20 is linked to the turntable 21 to drive the eccentric structure 24 to rotate, driving the rocker 25 to move eccentrically, so that the rocker 25 drives the impact rod to move back and forth along the direction of the arrow x, thereby realizing the impact function of the electric hammer.

[0039] The turntable 21 is provided with a clamping block 211, and the driving wheel 20 is provided with a clamping slot 201 matching the clamping block 211. The clamping block 211 is clamped into the clamping slot 201 to connect the turntable 21 with the driving wheel 20, and the two move synchronously to achieve impact. The clamping block 211 is disengaged from the clamping slot 201 to disengage the turntable 21 from the driving wheel 20; the two are disconnected, the impact fails, and the gear switching of the electric hammer is achieved.

[0040] The impact device 2 also includes an impact spring 22, which is arranged on the turntable 21. When the turntable 21 is disengaged from the transmission wheel 20, the impact spring 22 is compressed, and the impact spring 22 releases energy to reset the turntable 21. Through the bounce of the impact spring 22, it can ensure that the block 211 of the turntable 21 is inserted into the slot 201 of the transmission wheel 20, thereby realizing the linkage between the turntable 21 and the transmission wheel 20.

[0041] The rotating shaft 242 is rotatably provided with an abutment plate 23 , and the impact spring 22 is arranged between the rotating disk 21 and the abutment plate 23 .

[0042] The specific structure of the connection between the rotating disk 21 and the eccentric structure 24 is as follows:

[0043] The turntable 21 is provided with a first through cavity 212, and the transmission wheel 20 is provided with a second through cavity 202. The first through cavity 212 and the second through cavity 202 are arranged opposite to each other and in communication. The rotating shaft 242 passes through the first through cavity 212 and the second through cavity 202 in sequence. The first through cavity 212 is provided with a protrusion 213, and the rotating shaft 242 is provided with a groove 243. The protrusion 213 is slidably arranged in the groove 243. When the impact spring 22 is compressed and releases energy, the turntable 21 slides up and down along the rotating shaft 242 on its axial direction, and the two can rotate synchronously at the same time.

[0044] The linkage relationship between the turntable 21 and the transmission wheel 20 is adjusted by the hammer drill switching lever 51. The hammer drill switching lever 51 includes a lever fixed end 511, a lever shaft 512 and a lever paddle 513. The lever fixed end 511 is fixedly connected to the knob 52. The lever shaft 512 is the rotating shaft of the hammer drill switching lever 51, which is fixedly connected to the fixed end 511. The lever paddle 513 is fixedly arranged on the lever shaft 512. When the knob 52 is rotated, the lever shaft 512 will drive the lever paddle 513 to synchronously rotate the set angle. The lever paddle 513 drives the turntable 21 to move upward during the rotation, so that the turntable 21 is separated from the transmission wheel 20, and the impact is invalid.

[0045] Preferably, the lever paddle 513 is provided with an avoidance position 514 .

[0046] In this embodiment, the outer ring of the turntable 21 is provided with a surrounding plate 214, and the surrounding plate 214 and the axis of the lever shaft 512 are in the same horizontal plane or the surrounding plate 214 is lower than the horizontal plane where the axis of the lever shaft 512 is located. Therefore, when the lever paddle 513 rotates 90 degrees, the lever paddle 513 drives the surrounding plate 214 to move the turntable 21 upward, thereby causing the turntable 21 to disengage from the transmission wheel 20.

[0047] The rotating device 3 includes a rotating gear 31, a rotating bevel gear 32 and a driven wheel 33. The rotating gear 31 is meshed and connected with the output wheel 4. The rotating bevel gear 32 and the rotating gear 31 are fixed on the same axis. The rotating bevel gear 32 is meshed and connected with the driven wheel 33. The driven wheel 33 is linked with the rotating mechanism. The rotation of the rotating gear 31 drives the rotating bevel gear 32 to rotate synchronously. The rotating bevel gear 32 drives the driven wheel 33 to rotate. The driven wheel 33 drives the rotating mechanism to rotate to realize rotation.

[0048] Preferably, helical teeth 331 and fixed blocks 332 are provided on both sides of the driven wheel 33 , the helical teeth 331 are meshed and connected with the rotating helical gear 32 , and the driven wheel 33 is linked with the rotating mechanism through the fixed block 332 .

[0049] The electric hammer also includes a rotation switching device, which is arranged between the driven wheel 33 and the rotating mechanism. The rotation switching device is connected to the rotating mechanism, and the two can rotate synchronously. The rotation switching device is linked to the driven wheel 33. When the rotation switching device is connected to the driven wheel 33, the motor transmits power to the rotation switching device through the rotating device 3, and then drives the rotating mechanism to rotate through the rotation switching device to realize the rotation of the electric hammer. When the rotation switching device is disconnected from the driven wheel 33, the power of the motor cannot be transmitted to the rotation switching device through the rotating device 3, the rotating mechanism cannot rotate, and the rotation fails.

[0050] The rotation switching device includes a ring block 61, which is connected to the rotation mechanism. The ring block 61 is provided with a fixed groove (not shown in the figure), and the fixed block 332 is arranged in the fixed groove. The two cooperate to achieve limitation in the rotation direction, thereby achieving synchronous rotation of the two. At the same time, the fixed block 332 is slidably connected to the fixed groove, and the ring block 61 can be slidably connected along the x direction, so that the ring block 61 is connected to the driven wheel 33 or the ring block 61 is disconnected from the driven wheel 33. When the ring block 61 is connected to the driven wheel 33, the motor transmits power to the rotation switching device through the rotation device 3, and then drives the rotation mechanism to rotate through the rotation switching device. When the ring block 61 is disconnected from the driven wheel 33, the motor power cannot be transmitted to the ring block 61 through the driven wheel 33 and drive the rotation mechanism to rotate, making the rotation invalid.

[0051] In this embodiment, a first spring (not shown) is provided between the ring block 61 and the housing 1 . When the ring block 61 is disconnected from the driven wheel 33 , the first spring is compressed to store energy. After the first spring releases the energy, the ring block 61 is reset and connected to the driven wheel 33 .

[0052] The electric hammer includes a fixed block (not shown) and a sliding block 62. The fixed block is fixedly connected to the inner wall of the housing 1, and the sliding block 62 is slidably connected to the fixed block. The two are rotationally limited, that is, the sliding block 62 can only move axially but cannot rotate. After the ring block 61 is disconnected from the driven wheel 33, the ring block 61 is in the first position, and the ring block 61 is located between the driven wheel 33 and the sliding block 62. At this time, the rotating mechanism is disconnected from the motor, and the rotating mechanism can rotate under the action of external force. After the ring block 61 moves further, it is in the second position, and the ring block 61 is engaged with the sliding block 62 to lock the rotation of the ring block 61, and then lock the rotating mechanism, so that the rotation of the electric hammer fails.

[0053] The electric hammer also includes a switching rod 63, which is connected to the knob device 5 and the rotation switching device. The switching rod 63 is linked to the ring block 61. The knob device 5 switches different marking positions to move the switching rod 63 to different strokes, so that the ring block 61 is connected or disconnected from the driven wheel 33.

[0054] The switching rod 63 includes a power input rod 631 and a power output rod 632, which are fixedly connected to each other, the power output rod 632 is linked to the ring block 61, the power input rod 631 is connected to the knob device 5, the housing 1 is fixedly provided with a fixing plate (not shown in the figure), the fixing plate is slidably connected to the power input rod 631, and a second spring (not shown in the figure) is provided between the fixing plate and the power input rod 631. Under the elastic force of the second spring, the power input rod 631 is kept in contact with the lever shaft 512 or the lever paddle 513 in different states. During the rotation of the lever paddle 513, the power input rod 631 is moved in the positive direction of the arrow X by the lever paddle 513, so that the ring block 61 is separated from the driven wheel 33, and the rotation is invalid.

[0055] In this embodiment, the state locking mechanism locks the knob 52 at any gear mark position, which not only ensures the accuracy of the gear adjustment, but also prevents the problem of incorrect use caused by accidentally touching the knob 52. The state locking mechanism includes a movable part 53 and a fixed part 54. The fixed part 54 is fixed in the knob groove. The movable part 53 is connected to the knob 52, and the two rotate synchronously. The movable part 53 is locked or unlocked with the fixed part 54, thereby realizing the locking or unlocking of the knob 52.

[0056] The knob 52 includes a rotating chassis 521, which is rotatably connected in the knob groove of the housing 1. The fixed end 511 of the hammer drill switching lever 51 is fixedly connected to the rotating chassis 521. A rotary block 522 is fixedly provided on the rotating chassis 521. The rotary block 522 is manually rotated to drive the rotating chassis 521 and the hammer drill switching lever 51 to rotate synchronously to switch gears. An alignment mark is provided on the rotary block 522 to facilitate the alignment of the gears. The rotating chassis 521 is provided with a rotary cavity 423, and the movable part 53 is arranged in the rotary cavity 423. The movable part 53 is movably connected to the rotating chassis 521, and the movable part 53 can move radially along the rotating chassis 521.

[0057] The movable part 53 is provided with a locking block 534, and the fixed part 54 is provided with a sliding groove 541. The sliding groove 541 is connected to four groups of locking chambers 542. The locking block 534 is slidably connected with the sliding groove 541. The locking block 534 is inserted into the locking chamber 542 to lock the movable part 53 and the fixed part 54. The locking block 534 is disengaged from the locking chamber 542 and slides in the sliding groove 541 to unlock the movable part 53 and the fixed part 54.

[0058] The number of the locking cavities 542 corresponds to the number of the gear positions.

[0059] The movable part 53 includes a driving block 531, and two groups of upper limiting blocks 533 and lower limiting blocks 532 are provided on both sides of the driving block 531. The rotating chassis 521 is provided with a accommodating cavity for accommodating the upper limiting blocks 533 and the lower limiting blocks 532. A third spring is provided between the upper limiting block 533 and the rotating chassis 521, and the lower limiting block 532 is provided with a locking block 534.

[0060] Preferably, the end surface of the driving block 531 is set to be a curved surface, and the curved surface is provided with textures for increasing friction.

[0061] When the state locking mechanism is in use and it is necessary to switch the gear, the rotary block 522 is manually held and the driving block 531 is synchronously pressed in the direction of the rotary block 522 to compress the third spring, so that the locking block 534 disengages from any locking cavity 542 to achieve unlocking, and the rotary block 522 is rotated. At this time, the locking block 534 slides in the sliding groove 541. When the rotary block 522 moves to the target gear position, the driving block 531 is released, and the third spring releases energy. Under the action of the third spring, the locking block 534 is stuck in the corresponding locking cavity 542 to achieve locking.

[0062] The gear shifting process is as follows:

[0063] like Figure 5 As shown, the electric hammer is in the impact rotation gear, at this time, the lever paddle 513 is in a vertical downward position. When the gear needs to be switched to the rotation gear, the knob 52 is unlocked and rotated counterclockwise from the impact rotation gear mark 12 to the rotation gear mark 11 and locked. In this process, the lever paddle 513 rotates counterclockwise to drive the turntable 21 to move up, so that the turntable 21 is separated from the transmission wheel 20, and the impact fails, and the result is as shown in FIG. Figure 6 The state shown is that the electric hammer is in the rotation gear position.

[0064] like Figure 7 As shown, the electric hammer is in the adjustment gear position, and the switch rod 63 is pushed by the lever paddle 513, so that the ring block 61 is separated from the driven wheel 33, and the rotation is disabled. When the motor is not powered, the direction of the tool used by the electric hammer can be manually adjusted, and the tool impacts at a set angle.

[0065] like Figure 8 As shown in the figure, the electric hammer is in the impact gear. Figure 7 On the basis, the switch rod 63 continues to move in the same direction under the push of the lever paddle 513, the ring block 61 is separated from the driven wheel 33, the ring block 61 is engaged with the sliding block 62, the rotating mechanism is locked, the impact device 2 operates normally, and the electric hammer performs the impact operation.

[0066] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. An electric hammer, characterized in that: It includes a motor, an impact device, a rotating device and a knob device. The motor is connected to the impact device and the rotating device respectively. The knob device includes a hammer drill switching lever, a knob and a state locking mechanism. The hammer drill switching lever cuts off or connects the connection between the motor and the impact device. The knob is fixedly connected to the hammer drill switching lever. The state locking mechanism locks or unlocks the knob. The rotating device includes a rotating gear, a rotating bevel gear and a driven wheel. The rotating gear is meshed with the output wheel fixed to the output shaft of the motor. The rotating bevel gear is fixedly coaxially with the rotating gear. The rotating bevel gear is meshed with the driven wheel. The motor, the impact device and the rotating device are arranged on a shell. The shell is provided with a knob groove. The state locking mechanism includes a movable part and a fixed part. The fixed part is fixed in the knob groove. The movable part is connected to the knob. The two rotate synchronously. The movable part is locked or unlocked with the fixed part.

2. An electric hammer according to claim 1, characterized in that: The invention comprises a shell, wherein the knob device is rotatably arranged in the knob groove, and the shell is provided with a rotation gear mark, an impact rotation gear mark, an adjustment gear mark and an impact gear mark distributed on the outer circle of the knob groove.

3. An electric hammer according to claim 1, characterized in that: The impact device includes a transmission wheel, a rotating disk, an eccentric structure and a rocker. The transmission wheel is meshed and connected with an output wheel fixed to the output shaft of the motor. The eccentric structure includes an eccentric disk and a rotating shaft. One end of the rocker is rotatably connected to the eccentric disk, and the other end of the rocker is connected to the impact mechanism of the electric hammer. The transmission wheel is meshed and connected with the output wheel and linked with the rotating disk. The rotating disk is connected to the rotating shaft, and the two move synchronously.

4. An electric hammer according to claim 3, characterized in that: The turntable is provided with a clamping block, and the driving wheel is provided with a clamping slot matching the clamping block. The clamping block is clamped into the clamping slot to connect the turntable and the driving wheel, and the two move synchronously. The clamping block is separated from the clamping slot to separate the turntable from the driving wheel.

5. An electric hammer according to claim 1, characterized in that: It includes an impact mechanism and a rotating mechanism, wherein the impact mechanism is connected to the impact device, the rotating mechanism and the rotating device are linked via a rotating switching device, the rotating switching device is arranged between the driven wheel and the rotating mechanism, the rotating switching device is connected to the rotating mechanism, the two rotate synchronously, and the rotating switching device is linked to the driven wheel.

6. An electric hammer according to claim 5, characterized in that: The rotation switching device includes a ring block, which is connected to the rotation mechanism and is provided with a fixing groove. The fixed block provided on the driven wheel is clamped in the fixing groove to connect the ring block to the driven wheel, and the fixing block is separated from the fixing groove to disconnect the ring block from the driven wheel.

7. An electric hammer according to claim 6, characterized in that: It includes a fixed block and a sliding block, wherein the fixed block is fixedly connected to the inner wall of the shell, the sliding block is slidably connected to the fixed block, and the two are rotationally limited. The ring block is in a first position, the ring block is located between the driven wheel and the sliding block, and the ring block is in a second position, the ring block is clamped with the sliding block, and the rotation of the ring block is locked.

8. An electric hammer according to claim 5, characterized in that: It also includes a switching rod, which is connected to the knob device and the rotation switching device. The switching rod is linked with the ring block to connect or disconnect the ring block with the driven wheel.

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