CN207747002U - The operating mode switching mechanism of electric hammer - Google Patents

The operating mode switching mechanism of electric hammer Download PDF

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Publication number
CN207747002U
CN207747002U CN201721748913.7U CN201721748913U CN207747002U CN 207747002 U CN207747002 U CN 207747002U CN 201721748913 U CN201721748913 U CN 201721748913U CN 207747002 U CN207747002 U CN 207747002U
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China
Prior art keywords
sliding
gear
torque spring
gear shaft
shaft
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CN201721748913.7U
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Chinese (zh)
Inventor
王亮
郑华平
严林根
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NINGBO LIANGYE ELECTRIC APPLIANCE CO Ltd
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NINGBO LIANGYE ELECTRIC APPLIANCE CO Ltd
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Abstract

The utility model is related to a kind of operating mode switching mechanisms of electric hammer, include gear shaft and impacting shaft in shell and arranged in parallel, cylinder is equipped in impacting shaft, it is connected by swing rod between cylinder and gear shaft, swing rod is mounted on by Oscillating lever bearing on gear shaft, gear shaft is equipped with the coupling block that can be rotated and can axially slide with gear shaft, is connected by clutch structure between coupling block and Oscillating lever bearing;The first gear that can be rotated with gear shaft and the second gear that can be freely rotated are installed on gear shaft;The linkage set that can axially slide and can be engaged with first gear and second gear is also arranged on gear shaft, the axial sliding for the set that links is to decide whether to engage with second gear;The first spring is also arranged on gear shaft, the first spring is held between coupling block and linkage set, and it is in be located remotely from each other trend to make the two;The gear wheel engaged with second gear is installed on impacting shaft;Coupling block and linkage set are driven by same knob driving structure and can axially be slid.

Description

The operating mode switching mechanism of electric hammer
Technical field
The utility model is related to a kind of electric hammer more particularly to a kind of operating mode switching mechanisms of electric hammer.
Background technology
Such as the Chinese utility model patent of Patent No. CN200920037651.2《A kind of electric hammer driving device》, by motor Axis, impacting shaft, the transmission compositions such as tooth shaft and control handle, transmission tooth shaft are equipped with pinion gear, Oscillating lever bearing, connector and bullet Spring;Impacting shaft is equipped with gear wheel and cylinder, and it is dovetail groove profile spiral camber connector to be mainly characterized by described connector, It is made of forward and backward coupling block, offers dovetail groove on preceding coupling block, and cell wall helically curved surface, rear coupling block is equipped with and swallow The boss that stern notch and spiral camber match.This electric hammer is provided with connector and spring, and passes through connector and Oscillating lever bearing Combination and separation can realize hammer drill function and simple drilling function.For another example the one of Patent No. CN201420518933.5 Part Chinese utility model patent《A kind of torque adjustment structure of electric hammer》, also disclose this can realize and bore function or hammer drill work( The electric hammer of energy.But this electric hammer only has simple drilling and hammer drill both functions, and non-locked shape is in without impacting shaft Hammering function and impacting shaft under state are in the hammering function under locking state;These four works of electric hammer can not realized yet The switching mechanism that operation mode switches over.
Therefore above-mentioned electric hammer structure also needs to be further improved, and especially changes to the operating mode switching mechanism of electric hammer Into.
Utility model content
For the current state of the art, the technical problem to be solved by the utility model is to provide one kind having a variety of work The operating mode switching mechanism of pattern and simple and reasonable, easy to operate electric hammer.
Technical solution is used by the utility model solves above-mentioned technical problem:A kind of operating mode switching machine of electric hammer Structure includes gear shaft and impacting shaft in shell and arranged in parallel, cylinder, cylinder and gear shaft is equipped in impacting shaft Between connected by swing rod, swing rod by Oscillating lever bearing be mounted on gear shaft on, gear shaft be equipped with can with gear shaft rotate simultaneously The coupling block that can axially slide, is connected between coupling block and Oscillating lever bearing by clutch structure;Being equipped on gear shaft can be with tooth The first gear of wheel shaft rotation and the second gear that can be freely rotated;It is characterized in that:It is also arranged with energy on the gear shaft The axial linkage set that slides and can engage with first gear and second gear, the axial of the set that links slide to decide whether and the Two gears engage;The first spring is also arranged on the gear shaft, first spring is held between coupling block and linkage set, It is in be located remotely from each other trend to make the two;The gear wheel engaged with second gear is installed on the impacting shaft;The coupling block and connection Dynamic set is driven by same knob driving structure and can axially be slid.
Preferably, the knob driving structure includes adjusting knob, eccentric wheel, the first torque spring, the second torsion bullet Spring, locating rod, the first sliding part and the second sliding part, wherein the locating rod is arranged in parallel with gear shaft, first sliding Part and the second sliding part wear on the securing lever and can be moved axially along locating rod;First sliding part and coupling block phase Even, the second sliding part is connected with linkage set;The equal opposite shell of first end of first torque spring and the second torque spring is solid The second end of fixed setting, the first torque spring and the second torque spring is connect with the first sliding part and the second sliding part respectively, institute It states eccentric wheel to be driven by adjusting knob and can be rotated, the arm of force of the second end of first torque spring and the second torque spring is equal It is bonded with the circumferential surface of the eccentric wheel so that the rotation of the eccentric wheel can drive the first torque spring and the second torque spring Second end swing, the second end swing of the first torque spring and the second torque spring can then drive the first sliding part and the respectively Two sliding parts are moved axially along locating rod.
Preferably, the end of the second end of first torque spring, which plugs, is connected to first sliding part, first The corresponding receptacle location of sliding part is equipped with the first groove type hole;The end of the second end of second torque spring, which plugs, is connected to institute The second sliding part is stated, the corresponding receptacle location of the second sliding part is equipped with the second groove type hole.
Preferably, the coupling block is equipped with first annular slot, corresponding first sliding part, which is equipped with, is caught in described the First insertion section of one annular groove;The linkage is arranged with the second annular groove, and corresponding second sliding part, which is equipped with, is caught in institute State the second insertion section of the second annular groove.
Preferably, the operating mode switching mechanism of the electric hammer, further includes the locked machine for limiting the bull gear drive Structure.
Further preferably, the locking mechanism is to wear on the securing lever and can be moved axially along the locating rod Third sliding part, one end of the third sliding part are provided with the ratchet clamping part for capableing of the stuck gear wheel.
Preferably, second sliding part, which can link, acts on the third sliding part, make third sliding part in institute It states and is in axial sliding in locating rod.
Further preferably, the locating rod is equipped with second spring, and the second spring is held in second sliding part Between the third sliding part so that the third sliding part is in the trend far from second sliding part.
Preferably, the operating mode switching mechanism of the electric hammer further includes fixed setting and coordinates with the adjusting knob The tabletting of setting, the tabletting are equipped with gradually convex lug boss, correspondingly, are equipped with and the lug boss card on the inside of the adjusting knob The groove matched.
Compared with prior art, the advantages of the utility model:Both being equipped on the gear shaft of electric hammer can rotate simultaneously with gear shaft The coupling block that can axially slide, and it is arranged with the linkage set that can axially slide and can be engaged with first gear and second gear; It can not only realize the swing of impacting shaft, and clutch action can be covered by linkage in second gear, realize the rotation of impacting shaft Whether;The coupling block and linkage set are driven by same knob driving structure and can axially be slid;The operating mode of this electric hammer The simple brill function, hammer drill function, impacting shaft that switching mechanism is capable of fast and easy realization electric hammer are under Unlocked state Hammering function and impacting shaft are in the switching of simple four kinds of operating modes of hammering function under locking state, and structure letter Single, novel, applicability is more extensive.
Description of the drawings
Fig. 1 is the positive apparent direction dimensional structure diagram of the utility model embodiment;
Fig. 2 is the rear apparent direction dimensional structure diagram of the utility model embodiment;
Fig. 3 is the section components structural decomposition diagram of the utility model embodiment;
Fig. 4 is the section components overlook direction dimensional structure diagram of the utility model embodiment;
Fig. 5 is the sectional view of the utility model embodiment;
Fig. 6 is the structural schematic diagram of the utility model embodiment;
Fig. 7 is enlarged drawing at A in Fig. 6;
Fig. 8 is the dimensional structure diagram of the adjusting knob of the utility model embodiment.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
It is a preferred embodiment of the utility model as shown in Fig. 1~Fig. 8.Wherein, for the ease of understanding that this practicality is new The technical solution of type, as shown in fig. 6,21 direction of work head of electric hammer is defined as a left side, 22 direction of handle of electric hammer is fixed Justice is the right side, and 2 direction of impacting shaft is defined as, and 1 direction of gear shaft is defined as down.
A kind of operating mode switching mechanism of electric hammer includes the gear shaft 1 and impacting shaft in shell and being mutually parallel 2, gear shaft 1 is located at the lower section of impacting shaft 2, is equipped with cylinder in impacting shaft 2, is connected by swing rod 3 between cylinder and gear shaft 1, Swing rod 3 is mounted on by Oscillating lever bearing 4 on gear shaft 1, and gear shaft 1, which is equipped with, to be rotated and can axially slide with gear shaft 1 Coupling block 5 is connected between coupling block 5 and Oscillating lever bearing 4 by clutch structure, and specifically, coupling block 5 is equipped with convex block, pendulum shaft It holds 4 and is equipped with groove, the two can be with snap-fit connection;The first gear 6 that can be rotated with gear shaft 1 is installed and can on gear shaft 1 The second gear 7 being freely rotated, being additionally provided on gear shaft 1 can cover with first gear 6 and 7 intermeshing linkage of second gear 8, linkage set 8 can with gear shaft 1 rotate and can axially slide and can clutch action in second gear 7;It is also arranged on gear shaft 1 There are the first spring 17, the first spring 17 to hold between coupling block 5 and linkage set 8, it is in be located remotely from each other trend to make the two;Impacting shaft Gear wheel 9 is installed, gear wheel 9 is intermeshed with second gear 7 on 2.
The operating mode switching mechanism of electric hammer further includes knob assembly and the slide bar component with knob assembly mating reaction.
Knob assembly includes adjusting knob 10, eccentric wheel 11, the first torque spring 12, the second torque spring 13, wherein the The first end of one torque spring 12 and the first end of the second torque spring 13 are fixed on shell, and correspondingly, first turns round The arm of force of the second end of the arm of force of the second end of power spring 12 and the second torque spring 13 is bonded respectively to be arranged in eccentric wheel 11 Both sides.
Slide bar component includes that locating rod 14, the first sliding part 15 and the second sliding part 16, locating rod 14 are parallel with gear shaft 1 It is arranged, specifically locating rod 14 can be fixed at the lower section of eccentric wheel 11, and the first sliding part 15 and the second sliding part 16 are It is threaded through in locating rod 14 and can be moved axially along locating rod 14;Eccentric wheel 11 can be adjusted by adjusting knob 10 to be in not Same position, so that 11 wobbler action of eccentric wheel is in the arm of force of the second end of the first torque spring 12 so that the first torsion bullet The end of the second end of spring 12 acts axially on the first sliding part 15 along locating rod 14, and the first sliding part 15 can drive coupling block 5 make axial sliding, or make 11 wobbler action of eccentric wheel in the arm of force of the second end of the second torque spring 13 so that second turns round The end of the second end of power spring 13 acts axially on the second sliding part 16 along locating rod 14, and the second sliding part 16 can drive connection Dynamic set 8 makees axial sliding.
The end of the second end of first torque spring 12, which plugs, is connected to the first sliding part 15, and the first sliding part 15 is corresponding The link position that plugs be equipped with the first groove type hole for moving in the up-down direction of end for the second end of the first torque spring 12 151;The end of the second end of second torque spring 13, which plugs, is connected to the second sliding part 16, and the second sliding part 16 connects accordingly It connects position and is equipped with the second activity trepanning 161 moved in the up-down direction for the end of the second end of the second torque spring 13.This When kind arrangement enables to the first sliding part 15 or the second sliding part 16 to horizontally slip along 14 axial direction of locating rod, the The end of the second end of the end of the second end of one torque spring 12 and the second torque spring 13 can be up and down.
Coupling block 5 is equipped with first annular slot 51, and corresponding first sliding part 15 is equipped with and is caught in the first of first annular slot 51 Insertion section 152;Linkage set 8 is equipped with the second annular groove 81, and corresponding second sliding part 16 is equipped with and is caught in the second annular groove (81) Second insertion section 162.Specifically, the first insertion section 152 and the second insertion section 162 are the insertion plate of platy structure, and insert The thickness for entering plate is less than the width of corresponding first annular slot 51 or the width of the second annular groove 81.
In addition, being also equipped with third sliding part 18 in locating rod 14, one end of third sliding part 18 is provided with can be stuck The ratchet clamping part 181 of gear wheel 9;Wherein, the second sliding part 16, which can link, acts on third sliding part 18, makes third sliding part 18 It is in axial sliding in locating rod 14.Specifically can refer to that third sliding part 18 is to have reeded notch plate, third sliding Part 18 is threaded through by the side floor of groove both sides in locating rod 14, and its ratchet clamping part 181 is set to the of third sliding part 18 On the side floor of one end, the second sliding part 16 is located in 18 groove of third sliding part, and locating rod 14 is equipped with second spring 19, the second spring 19 is held between the side floor of 18 first end of the second sliding part 16 and third sliding part so that third The side floor that sliding part 18 is equipped with the first end of ratchet clamping part 181 is in the trend far from the second sliding part 16 always;Second sliding part 16 driving linkage set 8 along gear shaft 1 axial direction to the right side slip when, can also drive the side slip to the right of third sliding part 18, this When, linkage set 8 and second gear 7 just off, third sliding part 18 ratchet clamping part 181 also not in contact with to gear wheel 9, impacting shaft 2 can also rotate under external force, and then the second sliding part 16 is further continued for side slip to the right, can drive third sliding part 18 make its ratchet clamping part 181 just stuck gear wheel 9, prevent impacting shaft 2 from rotating.Certainly, the second sliding part 16 is slided with third Part 18, which is integrated or both, to be fixedly connected, and same technique effect can be also reached.
The operating mode switching mechanism of electric hammer further includes that the pressure being equipped on shell and with adjusting knob 10 is fixedly installed Piece 20, tabletting 20 are equipped with gradually convex lug boss 201, and correspondingly, 10 inside of adjusting knob is equipped with blocks four matched with lug boss 201 Groove 101, four grooves 101 correspond to the eccentric wheel 11 under the adjusting of adjusting knob 10 and are in four different locations, and then refer to Electric hammer is in four different operating modes.This structure setting can make user when rotating adjusting knob 10, and feel is more It is good.
The course of work and principle of the operating mode switching mechanism of electric hammer are as follows:
User is by adjusting adjusting knob 10 so that when eccentric wheel 11 is in first position, in holding for the first spring 17 Under effect, coupling block 5 is in bonding state with Oscillating lever bearing 4, and correspondingly, linkage set 8 is also at second gear 7 engages shape State starts the switch of electric hammer, and gear shaft rotation, simultaneously gearing is in Oscillating lever bearing 4 for the rotation of coupling block 5, and Oscillating lever bearing 4 is with movable pendulum Bar 3 is in swing state, so that impacting shaft 2 carries out impact operation back and forth, meanwhile, gear shaft 1 rotates, but also linkage set Simultaneously gearing is intermeshed with gear wheel 9 again in second gear 7, second gear 7 for 8 rotations so that impacting shaft 2 is in rotation shape State thereby realizes the operating mode that hammer drill function is combined.After the work head clamping drill hammer of electric hammer, this Working mould Formula can be used for the drilling operation of brick wall or mixed mud wall.
By rotating adjusting knob 10 so that when eccentric wheel 11 is in the second position, 11 wobbler action of eccentric wheel is in first The arm of force of the second end of torque spring 12 so that the end of the second end of the first torque spring 12 is acted axially on along locating rod 14 First sliding part 15, the first sliding part 15 can drive coupling block 5 to turn left side slip along the axial direction of gear shaft 1, make coupling block 5 with Oscillating lever bearing 4 is in disengaged position, at this point, gear shaft 1 rotates, coupling block 5 is in idling conditions, can not gearing in pendulum Rod bearing 4 cannot make impacting shaft 2 carry out impact operation, but at this point, the second end of eccentric wheel 11 and the second torque spring 13 The eccentricity of arm of force contact position does not change, and linkage set 8 is still in meshing state with second gear 7, and gear shaft 1 rotates, It can be at rotary state by the 8 transmission rotation torque of set that links to impacting shaft 2, thereby realize simple brill work( The operating mode of energy.After drill bit is clamped in the work head 21 of electric hammer, this operating mode can be used for the general of the materials such as plank, metal Logical drilling operation.
By adjusting adjusting knob 10 so that when eccentric wheel 11 is in the third place, 11 wobbler action of eccentric wheel is in first The arm of force of the second end of torque spring 12 so that the end of the second end of the first torque spring 12 is acted axially on along locating rod 14 First sliding part 15, the first sliding part 15 can drive coupling block 5 to turn right side slip along the axial direction of gear shaft 1, make coupling block 5 with Oscillating lever bearing 4 revert to bonding state, and at the same time, 11 wobbler action of eccentric wheel is in the power of the second end of the second torque spring 13 Arm so that the end of the second end of the second torque spring 13 acts axially on the second sliding part 16, the second sliding along locating rod 14 The driving linkage of part 16 set 8 makes linkage set 8 and second gear 7 be in disengaged position, but this along the axial direction side slip to the right of gear shaft When effect held due to second spring 19, third sliding part 18 is in the trend far from the second sliding part 16, third sliding part always 18 ratchet clamping part 181 does not touch gear wheel 9, and gear wheel 9 is not locked, so impacting shaft 2 can also be in other external force It is freely rotated under effect;Under this state, gear shaft 1 rotates, and can be driven rotation torque by coupling block 5 and Oscillating lever bearing 4 To impacting shaft, swing impact conditions are at, and rotation torque cannot be driven to impacting shaft 2 by the set 8 that links;It is thus real The operating mode for the hammering function that impacting shaft is under Unlocked state is showed.After diamond bit head is clamped in the work head 21 of electric hammer, this The chisel that kind operating mode can be used for wall hits operation.
By adjusting adjusting knob 10 so that when eccentric wheel 11 is in four positions, eccentric wheel 11 and the first torque spring The eccentricity of the arm of force contact position of 12 second end does not change, and coupling block 5 is with Oscillating lever bearing 4 still in bonding state; And at this point, eccentric wheel 11 and the eccentricity of the arm of force contact position of the second end of the second torque spring 13 further increase so that The end of the second end of second torque spring 13 acts axially on the second sliding part 16, the driving of the second sliding part 16 along locating rod 14 Linkage set 8 continues side slip to the right along the axial of gear shaft, linkage set 8 with second gear 7 still in disengaged position, but at this time the Two sliding parts 16 also drive axial direction to the right side slip of the third sliding part 18 along gear shaft, the ratchet clamping part 181 of third sliding part 18 It is caught in gear wheel 9, gear wheel 9 is locked;Under this state, gear shaft 1 rotates, and can be passed by coupling block 5 and Oscillating lever bearing 4 Dynamic rotation torque is at swing impact conditions to impacting shaft 2, and cannot extremely be impacted by the 8 transmission rotation torque of set that links Axis 2, and the ratchet clamping part 181 of third sliding part 18 locks gear wheel 9, and impacting shaft 2 cannot be freely rotated;It thereby realizes Impacting shaft 2 is in the operating mode of the hammering function under locking state.Flat chisel head or U-shaped chisel head is clamped in the work head 21 of electric hammer Afterwards, this operating mode can be used for the top of a wall exact position and the chisel of fixed-direction hits operation.

Claims (9)

1. a kind of operating mode switching mechanism of electric hammer includes in shell and gear shaft arranged in parallel (1) and punching Axis (2) is hit, cylinder is equipped in impacting shaft (2), is connect by swing rod (3) between cylinder and gear shaft (1), swing rod (3) passes through pendulum Rod bearing (4) is mounted on gear shaft (1), and gear shaft (1) is equipped with the connection that can be rotated and can axially slide with gear shaft (1) Block (5) is connected between coupling block (5) and Oscillating lever bearing (4) by clutch structure;Being equipped on gear shaft (1) can be with gear shaft (1) first gear (6) rotated and the second gear (7) that can be freely rotated;It is characterized in that:On the gear shaft (1) also It is arranged with the linkage set (8) that can axially slide and can be engaged with first gear (6) and second gear (7), the axis of linkage set (8) To sliding to decide whether to engage with second gear (7);Also it is arranged with the first spring (17) on the gear shaft (1), described One spring (17) is held between coupling block (5) and linkage set (8), and it is in be located remotely from each other trend to make the two;On the impacting shaft (2) The gear wheel (9) engaged with second gear (7) is installed;The coupling block (5) and linkage set (8) are by same knob driving structure It drives and can axially slide.
2. the operating mode switching mechanism of electric hammer according to claim 1, it is characterised in that:The knob driving structure packet Include adjusting knob (10), eccentric wheel (11), the first torque spring (12), the second torque spring (13), locating rod (14), the first cunning Moving part (15) and the second sliding part (16), wherein the locating rod (14) is arranged in parallel with gear shaft (1), first sliding Part (15) and the second sliding part (16) are threaded through in locating rod (14) and can be moved axially along locating rod (14);Described first Sliding part (15) is connected with coupling block (5), and the second sliding part (16) is connected with linkage set (8);First torque spring (12) With the equal opposite shell fixed setting of first end of the second torque spring (13), the first torque spring (12) and the second torque spring (13) second end is connect with the first sliding part (15) and the second sliding part (16) respectively, and the eccentric wheel (11) is by adjusting knob (10) drive and can rotate, the arm of force of the second end of first torque spring (12) and the second torque spring (13) with it is described The circumferential surface of eccentric wheel (11) is bonded so that the rotation of the eccentric wheel (11) can drive the first torque spring (12) and second to turn round The second end of power spring (13) is swung, and the second end swing of the first torque spring (12) and the second torque spring (13) can then be distinguished The first sliding part (15) and the second sliding part (16) is driven to be moved axially along locating rod (14).
3. the operating mode switching mechanism of electric hammer according to claim 2, it is characterised in that:First torque spring (12) end of second end, which plugs, is connected to first sliding part (15), and the corresponding receptacle location of the first sliding part (15) is set There is the first groove type hole (151);The end of the second end of second torque spring (13), which plugs, is connected to second sliding part (16), the corresponding receptacle location of the second sliding part (16) is equipped with the second groove type hole (161).
4. the operating mode switching mechanism of electric hammer according to claim 2, it is characterised in that:The coupling block (5) is equipped with First annular slot (51), corresponding first sliding part (15) are equipped with the first insertion section for being caught in the first annular slot (51) (152);Linkage set (8) is equipped with the second annular groove (81), and corresponding second sliding part (16), which is equipped with, is caught in described the The second insertion section (162) of second ring slot.
5. the operating mode switching mechanism of electric hammer according to claim 2, it is characterised in that:It further include the limitation canine tooth Take turns the locking mechanism of (9) rotation.
6. the operating mode switching mechanism of electric hammer according to claim 5, it is characterised in that:The locking mechanism is to wear And it can be along the third sliding part (18) of the locating rod (14) axial movement, the third sliding part in locating rod (14) (18) one end is provided with the ratchet clamping part (181) for capableing of the stuck gear wheel (9).
7. the operating mode switching mechanism of electric hammer according to claim 6, it is characterised in that:Second sliding part (16) It can link and act on the third sliding part (18), so that third sliding part (18) is made in the locating rod (14) axial sliding It is dynamic.
8. the operating mode switching mechanism of electric hammer according to claim 7, it is characterised in that:The locating rod (14) wears Have a second spring (19), the second spring (19) hold second sliding part (16) and the third sliding part (18) it Between so that the third sliding part (18) is in the trend far from second sliding part (16).
9. according to the operating mode switching mechanism of claim 2~8 any one of them electric hammer, it is characterised in that:Further include solid Surely tabletting (20) that is being arranged and being equipped with the adjusting knob (10), the tabletting (20) are equipped with gradually convex lug boss (201), it correspondingly, is equipped on the inside of the adjusting knob (10) and blocks the groove (101) matched with the lug boss (201).
CN201721748913.7U 2017-12-14 2017-12-14 The operating mode switching mechanism of electric hammer Active CN207747002U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721748913.7U CN207747002U (en) 2017-12-14 2017-12-14 The operating mode switching mechanism of electric hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721748913.7U CN207747002U (en) 2017-12-14 2017-12-14 The operating mode switching mechanism of electric hammer

Publications (1)

Publication Number Publication Date
CN207747002U true CN207747002U (en) 2018-08-21

Family

ID=63148995

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721748913.7U Active CN207747002U (en) 2017-12-14 2017-12-14 The operating mode switching mechanism of electric hammer

Country Status (1)

Country Link
CN (1) CN207747002U (en)

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