Electric hammer capable of being locked through gear shifting

Abstract

The electric hammer comprises a shell, a driving motor, a transmission mechanism, an impact hammer, a battery pack, an unlocking switch, a speed change switch, a gear shifting rotary knob and a control circuit board, the gear shifting rotary knob comprises a rotary knob body and a locking piece, a rotary knob connecting groove is formed in the outer wall of the shell, the rotary knob body is rotationally connected into the rotary knob connecting groove, and the locking piece is arranged in the rotary knob connecting groove. The locking piece is movably connected to the rotary knob body, a clamping groove is formed in the inner wall of the rotary knob connecting groove, and the locking piece is embedded in the clamping groove and breaks away from the clamping groove when moving. According to the technical scheme, the gear shifting rotary knob can be locked, so that after gear shifting is completed, the position of the gear shifting rotary knob is not prone to being changed when being touched by mistake, the working quality can be improved, the safety risk can be reduced, the attention of operators can be kept concentrated, and the operation complexity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power tools, and more specifically, to a hammer drill with shift locking function. Background Art

[0002] A hammer drill is a power tool that combines drilling and hammering functions. It can effectively penetrate hard surfaces through rotational and impact motions. It is usually used for drilling holes in hard materials such as concrete, masonry, and stone, or for demolition work.

[0003] Hammer drills are usually equipped with a shift structure that allows users to switch between different working modes. The shift knob is one of the most commonly used shift structures on hammer drills. For example, in a Chinese patent with the publication number CN220945221U and the patent name "A Hammer Drill Facilitating Fixed-point Impact", it includes a hammer drill, an adjustment knob, a drill bit, a battery, and a grip. The adjustment knob is provided on the surface of the hammer drill. The drill bit and the battery are installed on the surface of the hammer drill. There is a grip on the outside of the hammer drill. An adjustment mechanism for adjusting the angle of the grip, a fixing mechanism for fixing the installed battery, and an auxiliary mechanism for guiding and supporting the drill bit to enable more accurate fixed-point impact work are provided on the outside of the hammer drill. Another example is an adjustable-speed impact hammer drill disclosed in a Chinese patent with the publication number CN216859624U. It includes an impact hammer drill body. A guide block is fixed on the outer wall of the top of the impact hammer drill body. A second movable frame is slidably connected to the outer wall of the top of the guide block. A connecting plate is fixed on the outer wall of one side of the second movable frame. An elastic telescopic rod is slidably connected to the inner wall of the connecting plate. A movable plate is fixed on the outer wall of the elastic telescopic rod. The movable plate is fixed on the inner wall of one side of the connecting plate. A suction cup is fixed on the outer wall of one side of the elastic telescopic rod. A rotating rod is rotatably connected to the outer wall of one side of the second movable frame. A buffer mechanism is provided between the rotating rod and the outer wall of the guide block. A grip is fixed on the outer wall of the bottom of the impact hammer drill body. A mode switching knob is provided on the outer wall of one side of the impact hammer drill body.

[0004] Generally, the shift knobs included in currently available hammer drills exemplified by the above prior art solutions cannot be self-locked after shifting. When the shift knob is accidentally touched, it is likely to rotate accidentally, resulting in an accidental change in the working mode of the hammer drill, affecting the working quality and efficiency, and even causing safety risks. At the same time, it causes the operator to ensure that the tool is always in the correct operating mode during work, which may distract the working attention and increase the complexity of the operation. Summary of the Invention

[0005] In view of the above situation, to overcome the problem that the shift knob included in the existing electric hammer generally cannot be self-locked after shifting, and it is prone to accidental rotation when the shift knob is accidentally touched, resulting in an accidental change in the working mode of the electric hammer. At the same time, it causes the operator to ensure that the tool is always in the correct operation mode during work, thus distracting the work attention and increasing the operation complexity. The purpose of the present utility model is to provide an electric hammer with a shift knob that can be locked, so that after shifting, the position of the shift knob is not easily changed when accidentally touched, thereby improving the work quality, reducing the safety risk, and enabling the operator's attention to be concentrated, thus reducing the operation complexity.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] An electric hammer with shiftable locking, which includes a housing, a drive motor, a transmission mechanism, a percussion hammer, a battery pack, an unlocking switch, a speed change switch, a shift knob, and a control circuit board. The drive motor, the transmission mechanism, and the control circuit board are arranged inside the housing. The percussion hammer is arranged at the front end of the housing, and the percussion hammer is connected to the drive motor through the transmission mechanism. The battery pack is arranged at the bottom of the housing. The speed change switch, the unlocking switch, and the shift knob are arranged on the outer wall of the housing. The drive motor, the battery pack, the speed change switch, the unlocking switch, and the shift knob are all electrically connected to the control circuit board. The shift knob includes a knob body and a locking member. A knob connection groove is formed on the outer wall of the housing. The knob body is rotatably connected to the knob connection groove. The locking member is movably connected to the knob body. A card slot is formed on the inner wall of the knob connection groove. The locking member is embedded in the card slot and disengages from the card slot when moving.

[0008] Preferably, a boss is formed on the knob body, and an inner slideway is formed inside the boss. One end of the inner slideway communicates with the outer wall of the boss. The locking member is slidably connected to the inner slideway.

[0009] Preferably, the shift knob further includes a spring. The spring is arranged in the inner slideway, and its two ends are respectively connected to the inner wall of the inner slideway and the locking member.

[0010] Preferably, an outer slideway is also formed on the knob body. A limiting clamping protrusion is formed on the inner wall of the outer slideway. A clamping block is formed on the locking member. The clamping block is slidably connected to the outer slideway. The locking member cooperates with the card slot through the clamping block.

[0011] Preferably, the transmission mechanism includes a motor gear, a large bevel gear, a transmission shaft, a swing rod bearing, a compression cylinder, and a cylinder pin. The motor gear is connected to the output end of the drive motor. The large bevel gear meshes with the motor gear. The swing rod bearing is located at the front end of the large bevel gear and is connected through the transmission shaft. The front end of the compression cylinder is connected to the percussion hammer. The cylinder pin is hinged to the rear end of the compression cylinder. The swing rod part of the swing rod bearing is hinged to the cylinder pin.

[0012] Preferably, it further includes a lighting lamp and a lampshade. The lighting lamp is arranged inside the housing and electrically connected to the control circuit board. The lampshade is arranged on the outer wall of the housing and opposite to the lighting lamp.

[0013] Preferably, an installation groove is formed at the bottom of the housing. The top of the battery pack is embedded in the installation groove. Sliders are formed on the side walls of the installation groove, and chutes are formed on the outer side wall of the battery pack. The sliders are slidably connected to the chutes. A power supply port is further provided in the installation groove, and a plug is arranged in the power supply port. The plug is electrically connected to the control circuit board, and a socket matching the plug is arranged on the battery pack.

[0014] Preferably, a handle is formed on the housing, and the handle is wrapped with a rubber sleeve.

[0015] Preferably, the number of the card slots is two.

[0016] Preferably, the housing includes a left housing and a right housing, and the left housing and the right housing are fixed by threaded fasteners.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] The shift knob of the electric hammer of the present utility model is composed of a knob main body and a locking member connected movably. Card slots are formed on the inner wall of the knob connection groove. The locking member is embedded in the card slots and can be disengaged from the card slots during movement. When the locking member cooperates with the card slots, the mating surface between the shift knob and the knob connection groove is changed from circular to non-circular, thereby restricting the rotation of the knob main body, and correspondingly fixing the entire shift knob in the gear where it is located, realizing shift locking, avoiding the shift knob from deflecting and disengaging from the gear where it is located when being accidentally touched, causing an accidental change in the working mode, further improving the working quality and efficiency, reducing the safety risk, and at the same time ensuring that the operator can focus on the operation and reducing the operation complexity. Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the shift knob of the electric hammer of the present utility model when the shift is locked;

[0020] Figure 2 is the overall structural schematic diagram of the shift knob of the electric hammer of the present utility model when the shift locking is released;

[0021] Figure 3 is the structural schematic diagram of the shift knob of the electric hammer of the present utility model when separated from the housing;

[0022] Figure 4 is the overall structural schematic diagram of the shift knob of the electric hammer of the present utility model;

[0023] Figure 5 is the exploded structural schematic diagram of the shift knob of the electric hammer of the present utility model;

[0024] Figure 6 is a schematic cross-sectional structure diagram of part A of the present utility model Figure 1 ;

[0025] Figure 7 is a schematic cross-sectional structure diagram of part B of the present utility model Figure 2 ;

[0026] Figure 8 is an enlarged schematic structure diagram of part C of the present utility model Figure 5 ;

[0027] Figure 9 is a schematic structure diagram when the left housing and the right housing of the electric hammer housing of the present utility model are separated

[0028] Figure 10 is a schematic structure diagram when the battery pack of the electric hammer housing of the present utility model is separated from the housing

[0029] Figure 11 is a schematic structure diagram of another perspective when the battery pack of the electric hammer housing of the present utility model is separated from the housing

[0030] As shown in the figure:

[0031] 1. Housing; 1a. Left housing; 1b. Right housing; 101. Knob connection groove; 102. Card slot; 103. Installation groove; 103a. Slide block; 104. Power supply port; 105. Handle; 2. Driving motor; 3. Transmission mechanism; 301. Motor gear; 302. Large bevel gear; 303. Transmission shaft; 304. Swing rod bearing; 304a. Swing rod part; 305. Compression cylinder; 306. Cylinder pin; 4. Impact hammer; 5. Battery pack; 501. Slide groove; 6. Unlock switch; 7. Speed change switch; 8. Shift knob; 801. Knob main body; 801a. Boss; 801b. Inner slideway; 801c. Outer slideway; 801d. Limit clamping projection; 802. Locking part; 802a. Clamping block; 803. Spring; 9. Control circuit board; 10. Lighting lamp; 11. Lamp cover; 12. Plug; 13. Socket; 14. Rubber sleeve; 15. Threaded fastener. Specific embodiments

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of simplifying the description, rather than indicating or implying that this orientation is a specific orientation that must be had, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present invention

[0034] As Figure 1 , Figure 2 and Figure 9 shown, the utility model relates to a hammer drill with shift locking, which comprises a housing 1, a driving motor 2, a transmission mechanism 3, a percussion hammer 4, a battery pack 5, an unlocking switch 6, a speed change switch 7, a shift knob 8 and a control circuit board 9. The interior of the housing 1 is hollow. The driving motor 2, the transmission mechanism 3 and the control circuit board 9 are all arranged inside the housing 1. The percussion hammer 4 is arranged at the front end of the housing 1. The percussion hammer 4 is connected to the driving motor 2 through the transmission mechanism 3. When the driving motor 2 operates, it drives the transmission mechanism 3 to drive the percussion hammer 4 to perform a hammering action. The battery pack 5 is arranged at the bottom of the housing 1. The speed change switch 7, the unlocking switch 6 and the shift knob 8 are arranged on the outer wall of the housing 1. The driving motor 2, the battery pack 5, the speed change switch 7, the unlocking switch 6 and the shift knob 8 are all electrically connected to the control circuit board 9. The control circuit board 9 has a chip, which receives the instructions input by the speed change switch 7, the unlocking switch 6 and the shift knob 8, and controls the operating state of the driving motor 2 after calculation, and correspondingly controls the working state of the percussion hammer 4. The battery pack 5 supplies power to the entire circuit;

[0035] As Figures 1 to 8 shown, the shift knob 8 comprises a knob body 801 and a locking member 802. A knob connection groove 101 is formed on the outer wall of the housing 1. The shape of the knob connection groove 101 matches the outer shape of the knob body 801. The knob body 801 is rotatably connected in the knob connection groove 101. That is to say, the mating surface between the knob body 801 and the knob connection groove 101 is a circular surface, so that the entire shift knob 8 can rotate in the knob connection groove 101 for shift operation. The locking member 802 is movably connected to the knob body 801. The movable connection can be a hinge connection, a sliding connection, etc., and there is no special limitation here, as long as it can produce a relative displacement with the knob body 801. A clamping groove 102 is formed on the inner wall of the knob connection groove 101. There is no special limitation on the clamping groove 102, and generally it matches the number of gears. The locking member 802 is embedded in the clamping groove 102 and can be disengaged from the clamping groove 102 during movement. When the locking member 802 and the clamping groove 102 are in an engaged state, the mating surface between the shift knob 8 and the knob connection groove 101 is changed from a circular shape to a non-circular shape, thereby restricting the rotation of the knob body 801, and correspondingly fixing the entire shift knob 8 in the gear where it is located, realizing shift locking, avoiding accidental deflection of the shift knob 8 out of the gear where it is located when the shift knob 8 is accidentally touched, causing an accidental change in the working mode, thereby improving the working quality and efficiency, reducing the safety risk, and at the same time ensuring that the operator can focus on the operation and reducing the complexity of the operation.

[0036] As Figures 4 to 8As shown, a boss 801a is formed on the knob body 801. When an operator shifts gears, the knob body 801 can be rotated in the knob connection groove 101 by controlling the boss 801a. An inner slideway 801b is formed inside the boss 801a. One end of the inner slideway 801b communicates with the outer wall of the boss 801a to form an opening. The locking member 802 is inserted into the boss 801a from the opening of the inner slideway 801b and is slidably connected in the inner slideway 801b. The locking member 802 is movably connected to the knob body 801 by moving along the inner slideway 801b, and the sliding of the locking member 802 can be achieved by pressing or pulling out, so that the gear shift locking of the gear shift knob 8 can be conveniently completed.

[0037] As Figures 4 to 7 shown, the gear shift knob 8 further includes a spring 803. The spring 803 is arranged in the inner slideway 801b, and its two ends are respectively connected to the inner wall of the inner slideway 801b and the locking member 802. When the locking member 802 moves, the spring 803 is stretched or compressed. The elastic force generated by the deformation of the spring 803 is used to realize the self-resetting of the locking member 802, and further make the gear shift locking of the gear shift knob 8 more convenient. Specifically, the spring 803 supports the locking member 802 in the initial state, so that the locking member 802 can be embedded into the card slot 102 on the inner wall of the knob connection groove 101 and remain in the card slot 102. When the locking member 802 is pressed, the supporting force of the spring 803 is overcome, and it moves in the inner direction of the inner slideway 801b and compresses the spring 803. The locking member 802 can be disengaged from the card slot 102. At this time, the mating surface between the gear shift knob 8 and the knob connection groove 101 is changed to a circle again, so that the gear shift can be carried out by rotation. As the knob body 801 rotates, the locking member 802 is disengaged from the relative position of the card slot 102. When it rotates to be opposite to the card slot 102 again, the spring 803 obtains the space for restoring deformation, thereby driving the locking member 802 to be embedded into the card slot 102 again, and realizing the gear shift locking again.

[0038] As Figures 4 to 8 shown, an outer slideway 801c is also formed on the knob body 801. A block 802a is formed on the locking member 802. The block 802a is slidably connected in the outer slideway 801c. The locking member 802 is matched with the card slot 102 through the block 802a. After the matching, the rotation of the entire gear shift knob 8 is restricted by the abutment between the inner wall of the card slot 102 and the outer wall of the block 802a to realize the gear shift locking. A limiting convex 801d is formed on the inner wall of the outer slideway 801c. The limiting convex 801d is located at the end of the outer slideway 801c. The inner diameter of the outer slideway 801c converges at the limiting convex 801d, so as to limit the maximum moving stroke of the locking member 802 and prevent the locking member 802 from moving over and disengaging from the knob body 801.

[0039] As Figure 9As shown in the figure, the transmission mechanism 3 includes a motor gear 301, a large bevel gear 302, a transmission shaft 303, a swing rod bearing 304, a compression cylinder 305 and a cylinder pin 306. Among them, the motor gear 301 is connected to the output end of the driving motor 2, and the motor gear 301 is directly driven by the driving motor 2 to rotate. The large bevel gear 302 meshes with the motor gear 301. When the motor gear 301 rotates, it drives the large bevel gear 302 to rotate. The swing rod bearing 304 is located at the front end of the large bevel gear 302 and is connected through the transmission shaft 303. The transmission shaft 303 transmits the torque of the large bevel gear 302 to the swing rod bearing 304, causing the swing rod part 304a of the swing rod bearing 304 to rotate eccentrically. The front end of the compression cylinder 305 is connected to the impact hammer 4, and the cylinder pin 306 is hinged to the rear end of the compression cylinder 305. The swing rod part 304a of the swing rod bearing 304 is hinged to the cylinder pin 306. When the swing rod part 304a of the swing rod bearing 304 rotates eccentrically, it exerts a force on the cylinder pin 306, causing the cylinder pin 306 to drive the compression cylinder 305 to reciprocate, thereby driving the impact hammer 4 to reciprocate synchronously to complete the hammering action.

[0040] As Figure 9 shown, it further includes a lighting lamp 10 and a lamp cover 11. The lighting lamp 10 is arranged in the housing 1 and is electrically connected to the control circuit board 9. The lighting lamp 10 is arranged on the outer wall of the housing 1 and is opposite to the lighting lamp 10. The light beam emitted by the lighting lamp 10 is scattered by the lamp cover 11 and then projected into the external space. Thus, when operating in an environment with relatively dim light, it provides lighting for the operator, ensures operation safety, and reduces safety risks.

[0041] As Figure 10 and Figure 11 shown, an installation groove 103 is formed at the bottom of the housing 1. The bottom and both ends of the installation groove 103 are communicated with the external space. The top of the battery pack 5 is embedded in the installation groove 103. A slider 103a is formed on the side wall of the installation groove 103. The slider 103a is the same length as the installation groove 103. A sliding groove 501 is formed on the outer side wall of the battery pack 5. The length of the sliding groove 501 matches that of the slider 103a. The slider 103a is slidably connected in the sliding groove 501. Thus, the connection position between the battery pack 5 and the housing 1 is detachably slidably connected. The disassembly and assembly of the battery pack 5 can be conveniently completed by moving the slider 103a along the sliding groove 501. Furthermore, the battery pack 5 can be replaced in a timely manner. In addition, a plug 12 is provided in the power supply port 104. The plug 12 is electrically connected to the control circuit board 9. A socket 13 matching the plug 12 is provided on the battery pack 5. Thus, a path is formed between the battery pack 5 and the control circuit board 9, and the electric energy of the battery pack 5 can supply power to the entire circuit. In the present utility model, the plug 12 and the socket 13 are of a contact type. Furthermore, when the battery pack 5 is installed, the plug 12 and the socket 13 can automatically complete the cooperation.

[0042] As Figure 1 and Figure 2As shown, a handle 105 is formed on the housing 1. The handle 105 is for the operator to hold during operation, enabling the electric hammer of the present utility model to be more stably controlled. A rubber sleeve 14 is wrapped around the handle 105. The rubber sleeve 14 can increase the friction during holding and, at the same time, provide a shock-absorbing effect when the impact hammer 4 hammers at high speed, thereby optimizing the stability of control.

[0043] As Figure 3 shown, the number of the card slots 102 is two. Since the number of the card slots 102 corresponds to the number of gears of the shift knob 8, it provides a richer gear selection for the operator to meet the usage requirements in different working environments.

[0044] As Figure 9 shown, the housing 1 includes a left housing 1a and a right housing 1b. The left housing 1a and the right housing 1b are fixed by a threaded fastener 15, making the left housing 1a and the right housing 1b detachable. Furthermore, it is convenient for maintenance when the drive motor 2, the transmission mechanism 3, and the control circuit board 9 malfunction. In addition, it is also convenient for the installation of the drive motor 2, the transmission mechanism 3, the control circuit board 9, the unlocking switch 6, the speed change switch 7, and the shift knob 8.

[0045] Combined Figures 1 to 11 , when the electric hammer of the present utility model is in use, the gear is adjusted by rotating the shift knob 8. When controlling the shift knob 8, it is necessary to first press its locking member 802 to move along the inner chute of the boss 801a, so that the locking block 802a disengages from the card slot 102 on the inner wall of the knob connection slot 101 of the housing 1, and the spring 803 is compressed. Thus, the mating surface between the shift knob 8 and the knob connection slot 101 is changed into a circular surface. At this time, the shift knob 8 can be rotated smoothly. During the rotation process, the locking member 802 disengages from the relative position of the card slot 102. At this time, the spring 803 is still in a compressed state and supports the locking member 802 to prepare for its automatic embedding to achieve shift locking when reaching the position opposite to the next card slot 102. After the gear adjustment is completed, the unlocking switch 6 is pushed and the speed change switch 7 is pressed, so that the drive motor 2 drives the motor tooth 301 of the transmission mechanism 3 to rotate under the control of the chip of the control circuit board 9. The motor tooth 301 drives the large bevel gear 302 to rotate. The transmission shaft 303 transmits the torque of the large bevel gear 302 to the swing rod bearing 304. The swing rod portion 304a of the swing rod bearing 304 applies a force to the cylinder pin 306, and the compression cylinder 305 is driven by the cylinder pin 306 to reciprocate, thereby driving the impact hammer 4 to perform a hammering action. When operating in a dark environment, the lighting lamp 10 can provide lighting for the operator, and when the battery pack 5 needs to be replaced, the slider 103a in the installation slot 103 of the housing 1 can be controlled to move along the chute for separation, which is convenient for replacement.

[0046] The above-described embodiments and the descriptions in the specification are only to illustrate the principles and the best embodiments of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A shiftable and lockable electric hammer, characterized in that, It includes a housing (1), a drive motor (2), a transmission mechanism (3), a percussion hammer (4), a battery pack (5), an unlocking switch (6), a speed change switch (7), a shift knob (8) and a control circuit board (9). The drive motor (2), the transmission mechanism (3) and the control circuit board (9) are arranged inside the housing (1). The percussion hammer (4) is arranged at the front end of the housing (1). The percussion hammer (4) is connected to the drive motor (2) through the transmission mechanism (3). The battery pack (5) is arranged at the bottom of the housing (1). The speed change switch (7), the unlocking switch (6) and the shift knob (8) are arranged on the outer wall of the housing (1). The drive motor (2), the battery pack (5), the speed change switch (7), the unlocking switch (6) and the shift knob (8) are all electrically connected to the control circuit board (9). The shift knob (8) includes a knob body (801) and a locking member (802). A knob connection groove (101) is formed on the outer wall of the housing (1). The knob body (801) is rotatably connected in the knob connection groove (101). The locking member (802) is movably connected to the knob body (801). A clamping groove (102) is formed on the inner wall of the knob connection groove (101). The locking member (802) is embedded in the clamping groove (102) and disengages from the clamping groove (102) during movement.

2. The electric hammer with shiftable locking according to claim 1, characterized in that, A boss (801a) is formed on the knob body (801). An inner slideway (801b) is formed inside the boss (801a). One end of the inner slideway (801b) communicates with the outer wall of the boss (801a). The locking member (802) is slidably connected in the inner slideway (801b).

3. The electric hammer capable of shifting and locking according to claim 2, wherein The shift knob (8) further includes a spring (803). The spring (803) is arranged in the inner slideway (801b). The two ends of the spring (803) are respectively connected to the inner wall of the inner slideway (801b) and the locking member (802).

4. The electric hammer capable of shifting and locking according to claim 3, wherein, An outer slideway (801c) is also formed on the knob body (801). A limiting clamping projection (801d) is formed on the inner wall of the outer slideway (801c). A clamping block (802a) is formed on the locking member (802). The clamping block (802a) is slidably connected in the outer slideway (801c). The locking member (802) cooperates with the clamping groove (102) through the clamping block (802a).

5. A shiftable and lockable electric hammer according to any one of claims 1 to 4, characterized in that, The transmission mechanism (3) includes a motor gear (301), a large bevel gear (302), a transmission shaft (303), a swing rod bearing (304), a compression cylinder (305) and a cylinder pin (306). The motor gear (301) is connected to the output end of the drive motor (2). The large bevel gear (302) meshes with the motor gear (301). The swing rod bearing (304) is located at the front end of the large bevel gear (302) and is connected through the transmission shaft (303). The front end of the compression cylinder (305) is connected to the percussion hammer (4). The cylinder pin (306) is hinged to the rear end of the compression cylinder (305). The swing rod portion (304a) of the swing rod bearing (304) is hinged to the cylinder pin (306).

6. A shiftable and lockable electric hammer according to claim 5, characterized in that It further includes a lighting lamp (10) and a lamp shade (11). The lighting lamp (10) is arranged inside the housing (1) and is electrically connected to the control circuit board (9). The lighting lamp (10) is arranged on the outer wall of the housing (1) and is opposite to the lighting lamp (10).

7. A shiftable and lockable electric hammer according to any one of claims 1, 2, 3, 4 or 6, characterized in that, An installation groove (103) is formed at the bottom of the housing (1). The top of the battery pack (5) is embedded in the installation groove (103). A slider (103a) is formed on the side wall of the installation groove (103). A sliding groove (501) is formed on the outer side wall of the battery pack (5). The slider (103a) is slidably connected in the sliding groove (501). A power supply port (104) is further formed in the installation groove (103). A plug (12) is arranged in the power supply port (104). The plug (12) is electrically connected to the control circuit board (9). A socket (13) matching with the plug (12) is arranged on the battery pack (5).

8. A shiftable and lockable electric hammer according to claim 7, characterized in that, A handle (105) is formed on the housing (1), and a rubber sleeve (14) is wrapped on the handle (105).

9. A shiftable and lockable electric hammer according to any one of claims 1, 2, 3, 4, 6 or 8, characterized in that The number of the clamping grooves (102) is two.

10. A shiftable and lockable electric hammer according to claim 9, characterized in that, The housing (1) includes a left housing (1a) and a right housing (1b), and the left housing (1a) and the right housing (1b) are fixed by a threaded fastener (15).

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