CN110871421A - Multifunctional electric hammer - Google Patents

Multifunctional electric hammer Download PDF

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Publication number
CN110871421A
CN110871421A CN201811017645.0A CN201811017645A CN110871421A CN 110871421 A CN110871421 A CN 110871421A CN 201811017645 A CN201811017645 A CN 201811017645A CN 110871421 A CN110871421 A CN 110871421A
Authority
CN
China
Prior art keywords
sleeve
eccentric
piece
switching
operating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811017645.0A
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Chinese (zh)
Inventor
施宏敏
黄海彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Dong Cheng Electromechanical Tool Co Ltd
Original Assignee
Jiangsu Dong Cheng Electromechanical Tool Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Dong Cheng Electromechanical Tool Co Ltd filed Critical Jiangsu Dong Cheng Electromechanical Tool Co Ltd
Priority to CN201811017645.0A priority Critical patent/CN110871421A/en
Publication of CN110871421A publication Critical patent/CN110871421A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/062Means for driving the impulse member comprising a wobbling mechanism, swash plate

Abstract

The invention discloses a multifunctional electric hammer, which is provided with a mode switching mechanism arranged in a shell, wherein the mode switching mechanism comprises: the input shaft, the first sleeve, the second sleeve, the guide rod, the operating part, the first switching piece and the second switching piece which are L-shaped and the spring which is pre-pressed between the two switching pieces and sleeved on the guide rod are driven by the motor, the first sleeve and the second sleeve are sleeved on the input shaft, the first switching piece is provided with a first driving arm which is abutted against the operating part, the second switching piece is provided with a second driving arm which is abutted against the operating part, the operating part is provided with an eccentric pin, and the eccentric pin is provided with an eccentric part and a concentric part; when the eccentric pin rotates, the eccentric part drives one of the two switching pieces, and the concentric part is abutted to the other switching piece; the multifunctional electric hammer is beneficial to reducing the friction force generated during mode switching.

Description

Multifunctional electric hammer
[ technical field ]
The invention relates to the field of electric tools, in particular to a multifunctional electric hammer with a mode switching mechanism.
[ background art ]
The electric tool is a multifunctional electric hammer, and a user selects different electric hammer working modes according to different use scenes. For example, chinese patent publication No. CN101633163B discloses an electric hammer with multiple modes, wherein a protrusion on an operating element is engaged with a coupling sleeve, and the protrusion can cause the position of the coupling sleeve to change by rotating the operating element, thereby realizing switching between different modes. The coupling sleeve rotates continuously while the projection remains stationary, and under the spring pressure, contact is maintained between the coupling sleeve and the projection, which generates large friction that consumes part of the energy, resulting in a reduced performance of the multi-functional electric hammer.
Therefore, there is a need for an improvement of a mode switching mechanism of the conventional electric hammer to reduce friction generated at the time of mode switching.
[ summary of the invention ]
To solve the above problems, the present invention provides a multifunctional electric hammer that reduces friction generated when switching modes.
In order to solve the technical problems, the invention adopts the following technical scheme: a multifunctional electric hammer 100 having a motor installed inside a housing, a mode switching mechanism 101, and an output mechanism 102, the mode switching mechanism 101 comprising: the input shaft 1, the first sleeve 2, the second sleeve 3, the guide rod 4, the operating member 7, the first switch plate 5 and the second switch plate 6 which are L-shaped, and the spring 8 which is pre-pressed between the two switch plates and is sleeved on the guide rod 4, the first sleeve 2 and the second sleeve 3 are sleeved on the input shaft 1, the first switch plate 5 is provided with a first cantilever 5a which is sleeved on the guide rod 4 and clamped on the first sleeve 2, and a first driving arm 5b which is abutted against the operating member 7, the second switch plate 6 is provided with a second cantilever 6a which is sleeved on the guide rod 4 and clamped on the second sleeve 3, and a second driving arm 6b which is abutted against the operating member 7, the operating member 7 is provided with an eccentric part 7b and a concentric part 7c, when the operating member 7 is driven, the eccentric part 7b pivots around the concentric part 7c, and the eccentric part 7b drives the first driving arm 5b or the second driving arm 6b, while the second drive arm 6b or the first drive arm 5b abuts on the concentric portion 7 c.
The further improvement scheme is as follows: the operating element 7 is provided with an eccentric pin 7a, and the eccentric portion 7b and the concentric portion 7c are located on the eccentric pin 7 a.
The further improvement scheme is as follows: the first switch plate 5 and the second switch plate 6 are staggered with each other along the axial direction of the operating member 7, the eccentric portion 7b has a first eccentric portion 7d and a second eccentric portion 7f along the axial direction of the operating member 7, respectively, when the operating member 7 is driven, the eccentric portion 7b pivots around the concentric portion 7c, and the first eccentric portion 7d drives the first driving arm 5b to move or the second eccentric portion 7f drives the second driving arm 6b to move.
The further improvement scheme is as follows: the first switch sheet 5 and the second switch sheet 6 are both provided with a slot, the casing is provided with a raised slide rail 18 matched with the slot, and the first switch sheet 5 and the second switch sheet 6 move left and right along the raised slide rail 18 and the guide rod 4.
The further improvement scheme is as follows: one end of the eccentric pin 7a, which is far away from the operating piece 7, is provided with a pressing piece 11, and the pressing piece 11 is pressed against the first switching piece 5.
The further improvement scheme is as follows: the casing has a first casing 9 and a second casing 10 separately arranged along the front-back direction, the operating element 7 is arranged on the first casing 9, the mode switching mechanism 101 is installed in the first casing 9, and the second casing 10 is provided with an abutting column 10a abutting against the first switching piece 5 or the second switching piece 6.
The further improvement scheme is as follows: the mode switching mechanism 101 further comprises an impact output member 12 sleeved on the input shaft 1, an impact internal spline 12a is arranged inside the impact output member 12, and an impact external spline engaged with the impact internal spline is arranged on the first sleeve 2; the output mechanism 102 comprises an output shaft 17 arranged above the input shaft 1 in parallel and a gearwheel 13 fixed on the output shaft 17, and the second sleeve 3 is provided with rotating teeth engaged with the gearwheel 13.
The further improvement scheme is as follows: the mode switching mechanism 101 further comprises a locking piece 14, a locking spring 15 and a locking pin 16, wherein the locking piece 14 is clamped with the gearwheel 13, the locking piece 14 comprises a supporting arm 14a, a sliding arm 14b and a clamping arm 14c, the supporting arm 14a is sleeved on the guide rod 4, one end of the locking spring 15 is abutted to the first shell 9, the other end of the locking spring preloads the supporting arm 14a to be abutted to the second switching piece 6, a slot is formed in the sliding arm 14b, the locking pin 16 penetrates through the slot and is fixed on the machine shell, and the clamping arm 14c is provided with a latch which is engaged with the gearwheel 13.
The further improvement scheme is as follows: the mode switching mechanism 101 has three modes according to different positions of the eccentric pin 7a, wherein in the first mode, the eccentric pin 7a is vertically arranged, the first sleeve 2 is meshed with the impact output part 12, and the second sleeve 3 is meshed with the large gear 13; in the second mode: the eccentric pin 7a is rotated clockwise from the first mode position, the first sleeve 2 is engaged with the impact output member 12, and the second sleeve 3 is disengaged from the large gear 13; in the third mode: the eccentric pin 7a is rotated counterclockwise from the first mode position, the first sleeve 2 is separated from the impact output member 12, and the second sleeve 3 is engaged with the large gear 13.
Another scheme of the invention is as follows: a multi-function electric hammer 100 comprising a motor installed inside a housing, a mode switching mechanism 101, an output mechanism 102, the mode switching mechanism 101 comprising: the device comprises an input shaft 1, a first sleeve 2, a second sleeve 3, a guide rod 4, an operating piece 7, an impact output piece 12, a first switching piece 5, a second switching piece 6 and a spring 8, wherein the input shaft, the first sleeve 2, the second sleeve 3, the guide rod 4, the operating piece 7, the impact output piece 12, the first switching piece and the second switching piece are driven by a motor, and the spring 8 is arranged between the two switching; the first sleeve 2, the second sleeve 3 and the impact output member 12 are sleeved on the input shaft 1, and the output mechanism 102 has an output shaft 17 parallel to the upper part of the input shaft 1 and a large gear 13 sleeved on the output shaft 17; the operating piece 7 is provided with an eccentric part 7b and a concentric part 7c, when the eccentric part 7b rotates around the concentric part 7c, the operating piece 7 is provided with at least three gear position fixing positions, when the operating piece 7 is located at a vertical position, the first sleeve 2 and the second sleeve 3 are respectively meshed with the impact output piece 12 and the large gear 13, and when the operating piece 7 is located at a horizontal position, the eccentric part 7b drives the first switching piece 5 to drive the first sleeve 2 to be separated from the impact output piece 12 or drives the second switching piece 6 to drive the second sleeve 3 to be separated from the large gear 13.
The further improvement scheme is as follows: the first switch piece 5 has a first cantilever 5a sleeved on the guide rod 4 and clamped on the first sleeve 2, and a first driving arm 5b abutted with the operating member 7, and the second switch piece 6 has a second cantilever 6a sleeved on the guide rod 4 and clamped on the second sleeve 3, and a second driving arm 6b abutted with the operating member 7.
The further improvement scheme is as follows: the first switch piece 5 and the second switch piece 6 are staggered with each other along the axial direction of the operating member 7, the eccentric portion 7b has a first eccentric portion 7d and a second eccentric portion 7f along the axial direction of the operating member 7, respectively, when the operating member 7 is driven, the eccentric portion 7b pivots around the concentric portion 7c, and the first eccentric portion 7d drives the first driving arm 5b to move or the second eccentric portion 7f drives the second driving arm 6b to move.
Compared with the prior art, the invention has the following beneficial effects: an eccentric pin 7a is arranged on an operating piece 7, a spring 8 pre-presses the first switching piece 5 and the second switching piece 6 on the eccentric pin 7a, an eccentric part 7b and a concentric part 7c are arranged on the eccentric pin, when the operating piece 7 is driven, the eccentric part 7b moves around the concentric part 7c, the eccentric part 7b drives the first driving arm 5b or the second driving arm 6b, meanwhile, the second driving arm 6b or the first driving arm 5b abuts against the concentric part 7c, and the first switching piece and the second switching piece are in turn in transmission connection with one of a first sleeve and a second sleeve in the driving mode switching mechanism, while the other one is in transmission state; the positions of the two sleeves are simultaneously and accurately controlled by the eccentric part 7b and the concentric part 7c of the eccentric pin 7a, and after the switching piece reaches the position, the switching piece cannot continuously apply pressure to the sleeves, so that the friction force generated during mode switching in the multifunctional electric hammer is reduced.
[ description of the drawings ]
FIG. 1 is a perspective view of the multi-functional electric hammer of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a front view of the first housing and a portion of the mode switching mechanism member of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4;
FIG. 6 is a perspective view of the mode switching mechanism of the present invention;
FIG. 7 is a perspective view of the first and second switch plates and the eccentric pin according to the present invention;
FIG. 8 is a perspective view of the mode switching mechanism of the present invention in the hammer drill mode;
FIG. 9 is a perspective view of the mode switching mechanism of the present invention in an impact mode;
FIG. 10 is a perspective view of the mode switching mechanism of the present invention in a latch shaft impact mode;
FIG. 11 is a perspective view of the mode switching mechanism of the present invention in the drill mode;
100. the multifunctional electric hammer comprises a multifunctional electric hammer body 101, a mode switching mechanism 102, an output mechanism 1, an input shaft 2, a first sleeve 3, a second sleeve 4, a guide rod 5, a first switching piece 5a, a first cantilever 5b, a first driving arm 6, a second switching piece 6a, a second cantilever 6b, a second driving arm 7, an operating piece 7a, an eccentric pin 7b, an eccentric part 7c, a concentric part 7d, a first eccentric part 7f, a second eccentric part 8, a spring 9, a first shell 10, a second shell 10a, a butting column 11, a pressing piece 12, an impact output piece 13, a gearwheel 14, a locking piece 15, a locking spring 16, a locking pin 17, an output shaft 18, a boss sliding rail 19 and a clamping mechanism.
[ detailed description of the invention ]
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1 to 7, the multi-functional electric hammer 100 of the present invention includes a first housing 9 and a second housing 10 separately disposed along a front-rear direction, wherein an X direction defining an output direction is a right end (a third direction), a Y direction defining a handle holding and extending direction is a lower end (a second direction), and a Z direction defining an installation direction of the first housing 9 and the second housing is a rear end (the first direction), the first housing and the second housing are provided with a motor, a mode switching mechanism 101, and an output mechanism 102, the multi-functional electric hammer 100 further includes a clamping mechanism 19 connected to the output mechanism 102, and the clamping mechanism 19 is used for clamping a tool bit. When the multifunctional electric hammer works, the motor transmits power to the mode switching mechanism 10, and a user adjusts the mode switching mechanism 101 according to different use scenes to realize switching of three modes, which are respectively as follows: in the impact drill mode (also referred to as a first mode), the impact mode (also referred to as a second mode), and the drill mode (also referred to as a third mode), the mode switching mechanism 101 transmits the adjusted torque or impact force to the output mechanism 102 in accordance with the torque or impact force, and finally the chuck mechanism 19 drives the tool bit to output the torque or impact force.
Referring to fig. 6, the mode switching mechanism 101 includes: the input shaft 1, the first sleeve 2, the second sleeve 3, the guide rod 4, the operating piece 7, the first switch piece 5 and the second switch piece 6 which are L-shaped, and the spring 8 which is pre-pressed between the two switch pieces and is sleeved on the guide rod 4, wherein the first sleeve 2 and the second sleeve 3 are sleeved on the input shaft 1, the first switch piece 5 is provided with a first cantilever 5a which is sleeved on the guide rod 4 and clamped on the first sleeve 2, and a first driving arm 5b which is abutted against the operating piece 7, the second switch piece 6 is provided with a second cantilever 6a which is sleeved on the guide rod 4 and clamped on the second sleeve 3, and a second driving arm 6b which is abutted against the operating piece 7; the first switch piece 5 and the second switch piece 6 are staggered with each other along the axial direction (first direction) of the operating piece 7; the operating member 7 has an eccentric pin 7a, and the spring 8 preloads the first switching piece 5 and the second switching piece 6 on the eccentric pin 7 a.
Referring to fig. 7, the operating element has an eccentric portion 7b and a concentric portion 7c, the eccentric portion 7b and the concentric portion 7c are located on an eccentric pin 7a, the eccentric pin 7a is sheet-shaped, one end of the sheet-shaped eccentric pin is disposed on a circle center axis of the operating element 7 to form the concentric portion 7c, the other end of the sheet-shaped eccentric pin forms the eccentric portion 7b, and the eccentric portion 7b pivots around the concentric portion 7c when the operating element 7 rotates; the eccentric portion 7b has a first eccentric portion 7d and a second eccentric portion 7f in the axial direction (first direction) of the operating element 7. When the operating member 7 is driven, the eccentric portion 7b pivots around the concentric portion 7c, the second eccentric portion 7f drives the second driving arm 6b to move or the first eccentric portion 7d drives the first driving arm 5b to move, as shown in fig. 8 to 11, the operating member 7 drives the first switching piece 5 and the second switching piece 6 to perform different position changes, and further drives the first sleeve 2 and the second sleeve 3 to perform position changes, so as to realize switching of three modes (details of a mode switching process will be described later). Of course, the eccentric portion 7b of the present invention has the first eccentric portion 7d and the second eccentric portion 7f along the front-back direction, respectively, in order to satisfy different strokes of different switching pieces, and those skilled in the art may also set a single or a plurality of eccentric portions staggered along the front-back direction according to their own needs.
Referring to fig. 3 to 6, the first switch plate 5 and the second switch plate 6 are both provided with a slot, and the housing is provided with a protruding slide rail 18 matching with the slot; when the mode is switched, the first switching piece 5 and the second switching piece 6 move left and right along the convex sliding rail 18 and the guide rod 4; the multifunctional electric hammer 100 further comprises a pressing piece 11 for preventing the first and second switching pieces from loosening along the third direction and a contact column 10a arranged on the second housing 10, wherein the pressing piece 11 is arranged at one end of the eccentric pin 7a far away from the operating piece 7, and both the pressing piece 11 and the contact column 10a are pressed against the first switching piece 5. The protruding sliding rail 18 and the abutting column 10a provided on the housing in the present invention are all plastic structures integrally formed with the housing.
Referring to fig. 2, 6 and 8, the mode switching mechanism 101 further includes an impact output member 12 sleeved on the input shaft 1, the output mechanism 102 includes an output shaft 17 arranged above the input shaft 1 in parallel, and a gearwheel 13 fixed on the output shaft 17, the output mechanism 102 further includes an air cylinder and a hammer (not shown) arranged inside the output shaft, the second sleeve 3 is provided with a rotating tooth engaged with the gearwheel 13, the impact output member 12 is provided with an impact internal spline inside, the first sleeve 2 is provided with an impact external spline engaged with the impact internal spline, when the electric hammer performs impact output, the first sleeve 2 is engaged with the impact output member 12, the impact output member 12 further drives the air cylinder to perform reciprocating motion from left to right, and the air cylinder drives the hammer to perform impact output; when the electric hammer is in rotary output, the second sleeve 3 is meshed with the large gear 13, and the large gear 13 drives the output shaft 17 to rotate and output.
Referring to fig. 6 and 9, the mode switching mechanism 101 further includes a locking plate 14 engaged with the large gear 13, a locking spring 15, and a locking pin 16, wherein the locking plate 14 includes a supporting arm 14a, a sliding arm 14b, and a locking arm 14c, the supporting arm 14a is sleeved on the guide rod 4, one end of the locking spring 15 abuts against the first housing 9, the other end pre-presses the supporting arm 14a to abut against the second switching plate 6, the sliding arm 14b is provided with a slot, the locking pin 16 penetrates through the slot and is fixed on the housing, and the locking arm 14c has a latch engaged with the large gear 13; when the operating element 7 drives the second switch plate 6 to move to the left, the left end of the locking plate 14 loses contact, the locking spring 15 drives the locking plate 14 to move to the left by means of elastic force, the clamping arm 14c is further meshed with the large gear 13, the output shaft is in a non-rotatable state at the moment, the clamping mechanism 19 is further non-rotatable, and the tool head is fixed. When the multifunctional electric hammer 100 performs impact output, the user rotates the tool bit to a desired angle, and then rotates the operation element 7 to engage the engaging arm 14c with the large gear 13, thereby fixing the position of the tool bit.
Referring to fig. 8 to 11, the operating member 7 has four shift position fixing positions, as shown in fig. 7, when the operating member 7 is in a first fixing position, i.e., a hammer drill mode (also referred to as a first mode), when the eccentric pin 7a is vertically arranged in the up-down direction (a second direction), i.e., the eccentric portion 7b and the concentric portion 7c of the eccentric pin 7a are simultaneously in the up-down direction (a second direction), the first sleeve 2 is engaged with the hammer output member 12, and the second sleeve 3 is engaged with the large gear 13.
Referring to fig. 8 to 9, when the operating element 7 rotates clockwise from the first mode position, the concentric portion 7c drives the second driving arm 6b to move leftward, the spring 8 is in a compressed state during the rotation, the first driving arm 5b is pressed against the concentric portion 7c by the pressure of the spring, and after the rotation is finished, as shown in fig. 9, the operating element 7 is in the second fixed position, i.e., the impact mode (also referred to as the second mode): the first sleeve 2 is engaged with the impact output member 12, and the second sleeve 3 is disengaged from the large gear 13; further, when the user rotates the tool head to a desired angle, as shown in fig. 9 to 10, the operating element 7 continues to rotate clockwise from the second fixed position, when the tool head rotates to the horizontal position of the eccentric pin 7a, the concentric portion 7c drives the second driving arm 6b to move leftward, the spring 8 is in a compressed state during the rotation, the first driving arm 5b is abutted against the concentric portion 7c by the pressure of the spring, after the rotation is finished, as shown in fig. 10, the operating element 7 is in the third fixed position, the eccentric pin 7a is horizontally arranged (perpendicular to the vertical direction of the eccentric pin 7a), and the impact mode (also referred to as the second mode) is still performed: at this time, the first sleeve 2 is engaged with the impact output member 12, the second sleeve 3 is separated from the large gear 13, the latch on the locking piece 14 is further engaged with the large gear 13, and the position of the tool bit is fixed.
Referring to fig. 8 and 11, when the operating element 7 rotates counterclockwise from the first mode position, the concentric portion 7c drives the first driving arm 5b to move rightward, the spring 8 is in a compressed state during the rotation, the second driving arm 6b is abutted to the concentric portion 7c by the pressure of the spring, and after the rotation is finished, as shown in fig. 11, the operating element 7 is in the fourth fixed position, the eccentric pin 7a is horizontally disposed, that is, the drill mode (also referred to as the third mode): the first sleeve 2 is separated from the impact output member 12, and the second sleeve 3 is engaged with the large gear 13.
Compared with the prior art, the invention has the following beneficial effects: an eccentric pin 7a is arranged on an operating piece 7, a spring 8 pre-presses the first switching piece 5 and the second switching piece 6 on the eccentric pin 7a, an eccentric part 7b and a concentric part 7c are arranged on the eccentric pin, when the operating piece 7 is driven, the eccentric part 7b moves around the concentric part 7c, the eccentric part 7b drives the first driving arm 5b or the second driving arm 6b, meanwhile, the second driving arm 6b or the first driving arm 5b abuts against the concentric part 7c, and the first switching piece and the second switching piece are in turn in transmission connection with one of a first sleeve and a second sleeve in the driving mode switching mechanism, while the other one is in transmission state; the positions of the two sleeves are simultaneously and accurately controlled by the eccentric part 7b and the concentric part 7c of the eccentric pin 7a, and after the switching piece reaches the position, the switching piece cannot continuously apply pressure to the sleeves, so that the friction force generated during mode switching in the multifunctional electric hammer is reduced.
The present invention is not limited to the above-mentioned embodiments, and the scope of the present invention is defined by the content of the claims.

Claims (12)

1. A multifunctional electric hammer (100) having a motor mounted inside a housing, a mode switching mechanism (101), an output mechanism (102), the mode switching mechanism (101) comprising:
an input shaft (1) driven by a motor, a first sleeve (2), a second sleeve (3), a guide rod (4), an operating piece (7), a first switching piece (5) and a second switching piece (6) which are L-shaped, and a spring (8) which is arranged between the two switching pieces and sleeved on the guide rod (4), wherein the first sleeve (2) and the second sleeve (3) are sleeved on the input shaft (1), the first switching piece (5) is provided with a first cantilever (5a) which is sleeved on the guide rod (4) and clamped on the first sleeve (2), and a first driving arm (5b) which is abutted against the operating piece (7), the second switching piece (6) is provided with a second cantilever (6a) which is sleeved on the guide rod (4) and clamped on the second sleeve (3), and a second driving arm (6b) which is abutted against the operating piece (7),
the method is characterized in that: the operating part (7) is provided with an eccentric part (7b) and a concentric part (7c), when the operating part (7) is driven, the eccentric part (7b) pivots around the concentric part (7c), the eccentric part (7b) drives the first driving arm (5b) or the second driving arm (6b) to move, and meanwhile, the second driving arm (6b) or the first driving arm (5b) abuts against the concentric part (7 c).
2. The multi-functional electric hammer (100) of claim 1, wherein: the operating element (7) is provided with an eccentric pin (7a), and the eccentric portion (7b) and the concentric portion (7c) are located on the eccentric pin (7 a).
3. The multi-functional electric hammer (100) of claim 2, wherein: the first switching piece (5) and the second switching piece (6) are mutually staggered along the axial direction of the operating piece (7), the eccentric part (7b) is respectively provided with a first eccentric part (7d) and a second eccentric part (7f) along the axial direction of the operating piece (7), when the operating piece (7) is driven, the eccentric part (7b) pivots around a concentric part (7c), and the first eccentric part (7d) drives the first driving arm (5b) to move or the second eccentric part (7f) drives the second driving arm (6b) to move.
4. The multi-functional electric hammer (100) of claim 3, wherein: the first switching piece (5) and the second switching piece (6) are both provided with slots, the shell is provided with protruding sliding rails (18) matched with the slots, and the first switching piece (5) and the second switching piece (6) move along the protruding sliding rails (18) and the guide rods (4).
5. The multi-functional electric hammer (100) of claim 4, wherein: one end, far away from the operating piece (7), of the eccentric pin (7a) is provided with a pressing piece (11), and the pressing piece (11) is pressed against the first switching piece (5).
6. The multi-functional electric hammer (100) of claim 5, wherein: the shell is provided with a first shell (9) and a second shell (10) which are separately arranged along a first direction, the operating piece (7) is arranged on the first shell (9), the mode switching mechanism (101) is arranged in the first shell (9), and the second shell (10) is provided with a butting column (10a) which butts against the first switching sheet (5) or the second switching sheet (6).
7. The multi-functional electric hammer (100) of claim 6, wherein: the mode switching mechanism (101) further comprises an impact output piece (12) sleeved on the input shaft (1), an impact internal spline is arranged inside the impact output piece (12), and an impact external spline meshed with the impact internal spline is arranged on the first sleeve (2); the output mechanism (102) comprises an output shaft (17) arranged above the input shaft (1) in parallel and a large gear (13) fixed on the output shaft (17), and the second sleeve (3) is provided with rotating teeth meshed with the large gear (13).
8. The multi-functional electric hammer (100) of claim 7, wherein: mode switching mechanism (101) still have with locking plate (14), locking spring (15), the stop pin (16) of gear wheel (13) block, locking plate (14) have support arm (14a), slide arm (14b), block arm (14c), support arm (14a) cover is located on guide arm (4), just the one end and first casing (9) butt of locking spring (15) and other end pre-compaction support arm (14a) and second switching piece (6) butt, be equipped with the slot on slide arm (14b), stop pin (16) run through the slot is fixed in on the casing, block arm (14c) have with the latch of gear wheel (13) meshing.
9. The multi-functional electric hammer (100) of claim 8, wherein: the mode switching mechanism (101) has three modes according to different positions of an eccentric pin (7a), wherein in the first mode, the eccentric pin (7a) is vertically arranged, the first sleeve (2) is meshed with the impact output part (12), and the second sleeve (3) is meshed with the large gear (13); in the second mode: the eccentric pin (7a) rotates clockwise from a first mode position, the first sleeve (2) engages with the impact output member (12), and the second sleeve (3) is disengaged from the large gear (13); in the third mode: the eccentric pin (7a) rotates counterclockwise from a first mode position, the first sleeve (2) is separated from the impact output member (12), and the second sleeve (3) is engaged with the large gear (13).
10. A multi-function electric hammer (100) comprising a motor mounted inside a housing, a mode switching mechanism (101), an output mechanism (102), the mode switching mechanism (101) comprising: the device comprises an input shaft (1) driven by a motor, a first sleeve (2), a second sleeve (3), a guide rod (4), an operating part (7), an impact output part (12), a first switching piece (5), a second switching piece (6) and a spring (8) which is arranged between the two switching pieces and sleeved on the guide rod (4); the output mechanism (102) is provided with an output shaft (17) which is arranged above the input shaft (1) in parallel and a large gear (13) which is sleeved on the output shaft (17); first sleeve (2), second sleeve (3) and impact output spare (12) overlap in the lump on input shaft (1), its characterized in that: the operating part (7) has eccentric portion (7b) and concentric portion (7c), when eccentric portion (7b) rotated around concentric portion (7c), operating part (7) have at least three gear fixed position, when operating part (7) were located vertical position, first sleeve (2) and second sleeve (3) engaged with impact output spare (12) and gear wheel (13) respectively, when operating part (7) were located horizontal position, eccentric portion (7b) drive first switch plate (5) drive first sleeve (2) and impact output spare (12) alternate segregation or drive second switch plate (6) drive second sleeve (3) and gear wheel (13) alternate segregation.
11. The multi-functional electric hammer (100) of claim 10, wherein: the first switching piece (5) is provided with a first cantilever (5a) sleeved on the guide rod (4) and clamped on the first sleeve (2), and a first driving arm (5b) abutted against the operating part (7), and the second switching piece (6) is provided with a second cantilever (6a) sleeved on the guide rod (4) and clamped on the second sleeve (3), and a second driving arm (6b) abutted against the operating part (7).
12. The multi-functional electric hammer (100) of claim 11, wherein: the first switching piece (5) and the second switching piece (6) are mutually staggered along the axial direction of the operating piece (7), the eccentric part (7b) is respectively provided with a first eccentric part (7d) and a second eccentric part (7f) along the axial direction of the operating piece (7), when the operating piece (7) is driven, the eccentric part (7b) pivots around a concentric part (7c), and the first eccentric part (7d) drives the first driving arm (5b) to move or the second eccentric part (7f) drives the second driving arm (6b) to move.
CN201811017645.0A 2018-09-01 2018-09-01 Multifunctional electric hammer Pending CN110871421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811017645.0A CN110871421A (en) 2018-09-01 2018-09-01 Multifunctional electric hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811017645.0A CN110871421A (en) 2018-09-01 2018-09-01 Multifunctional electric hammer

Publications (1)

Publication Number Publication Date
CN110871421A true CN110871421A (en) 2020-03-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811017645.0A Pending CN110871421A (en) 2018-09-01 2018-09-01 Multifunctional electric hammer

Country Status (1)

Country Link
CN (1) CN110871421A (en)

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