CN201736204U - Power tool - Google Patents

Abstract

The utility model discloses a power tool comprising a head shell, an output shaft, and a fastening element, wherein the output shaft extends from the head shell and is used for driving a working head; the fastening element is arranged on the output shaft and used for fixing the working head; and the fastening element is provided with a rod part extending into the output shaft. The power tool further comprises a quick-change clamping device that comprises a locking part arranged in the output shaft, and an actuating assembly capable of enabling the locking part to move relative to the fastening element, wherein the locking part is provided with a hole through which the rod part of the fastening element passes. The hole of the locking part is selectively matched with the rod part of the fastening element so as to enable thee locking part to selectively clamp or release the fastening element, so that the working head can be fastened onto the output shaft in a simple and reliable mode.

Description

Power tool

Technical field

The utility model relates to a kind of power tool, especially a kind of power tool of hand-held.

Background technology

Multi Role Aircraft is the power tool of the common hand-held of industry, and its operation principle is that the axial line that output shaft centers on self is done oscillating motion.Therefore, after on the free end of user at output shaft different working heads being installed, behind straight blade, saw blade, triangle frosted dish, shovel type scraper, can realize multiple different operating function, as sawing, cut, grind, scrape etc., to adapt to different work requirements.

Comparatively common in the market Multi Role Aircraft structurally generally comprises motor, and the motor shaft of motor is connected with cam pin, is arranged with bearing on cam pin, thereby constitutes an eccentric wheel structure.When motor shaft rotated, eccentric wheel structure can be done off-centre around the axial line of motor shaft and rotatablely move.The output shaft of Multi Role Aircraft is perpendicular to the motor shaft setting, on output shaft, be fixedly coupled a pull-fork assembly, pull-fork assembly is formed with two relative adjutages, eccentric wheel structure is surrounded, two adjutages inboard all with eccentric wheel structure in bearing closely contact, thereby when eccentric wheel was done off-centre and rotated, eccentric wheel structure can drive the oscillating motion on the shift fork generation horizontal direction, by the fixedlying connected of shift fork and output shaft, make output shaft center on its axial line and do swing again.After the free end of output shaft was installed different working heads, Multi Role Aircraft promptly can be realized multiple operating function under oscillating motion at a high speed.

But present Multi Role Aircraft still adopts comparatively original working head mounting means, promptly by spanner fastening bolt is unscrewed, and then tightening member is taken off from output shaft; Same, in the installation of annex with replace with, also be to adopt in the same way, need fastening bolt be unscrewed by spanner and can change working head and tighten installation, operate very loaded down with trivial details and waste time and energy.

Therefore, be necessary to provide a kind of improved power tool in fact, to address the above problem.

The utility model content

The purpose of this utility model is to provide a kind of power tool, can conveniently working head be installed on the output shaft of this power tool.

For achieving the above object, the utility model provides a kind of power tool, it comprises head capsule, extend in described head capsule and be used to drive the output shaft of working head and be installed on the described output shaft and be used for fixing the tightening member of described working head, and this tightening member is provided with the bar portion that extends in the described output shaft.This power tool also comprises the quick change clamping device, and described quick change clamping device comprises locking part of being located in the described output shaft and the actuating assembly that locking part is moved relative to described tightening member.Wherein, described locking part is provided with the hole, and the hole of described locking part is passed by the bar portion of described tightening member.Described actuating assembly drives described locking part around the straight line rotation perpendicular to the longitudinal axis of described output shaft, thus the off-position that the hole of described locking part selectively connects the clamped position that makes described locking part that described tightening member is in to be clamped in the described output shaft and can be removed in the described output shaft with the bar portion of described tightening member.

Preferably, described locking part comprises and is flat main body, and described main body is axially run through in described hole, and the madial wall in hole is provided with tight lock part, and described locking part cooperates with the bar portion of described tightening member by described tight lock part, with the bar portion of clamping or release tightening member.

Preferably, described locking part has and vertical two positions with respect to the longitudinal axis of output shaft, and when obliquity, the bar portion of the tight lock part of described locking part and described tightening member is inconsistent and clamp described tightening member; When the upright position, the bar portion of the tight lock part of described locking part and described tightening member is separated and discharges described tightening member.

Preferably, described tightening member comprises pressing plate, and described bar portion extends axially from the center of pressing plate, and described bar portion offers some grooves in a circumferential direction, and when tightening member was clamped by described locking part, the tight lock part of described locking part was held in the described groove just.

Preferably, the radial dimension in the hole of described locking part diminishes gradually from two ends to the middle part, and described hole has and is round table-like and symmetrically arranged upper inner surface and following inner surface, and described tight lock part is located between upper inner surface and the following inner surface.By the following inner surface of inclination is set, bootable tightening member enters in the hole of locking part smoothly, further cooperates with the tight lock part that is positioned at the hole.

Preferably, described power tool further comprises the self-locking sleeve pipe, described self-locking sleeve pipe comprises sleeve pipe and is connected in the self-locking chamber of sleeve pipe below, described locking part is housed in the described self-locking chamber, described self-locking chamber comprises sidewall and roof, side at described sidewall offers opening, and at the opposite side formation installing port relative with described opening of described sidewall, described locking part is provided with the pivot connector that is housed in the described opening.

Preferably, be provided with first elastic component between the roof of end relative and self-locking sleeve pipe on the main body of described locking part with pivot connector.

Preferably, described first elastic component is that two and described relatively pivot connector are symmetrical arranged, so that described locking part remains in the self-locking chamber of described self-locking sleeve pipe reposefully.

Preferably, the arranged outside of the sidewall in described self-locking chamber has anti-rotation groove, and the inside of described output shaft also is provided with stop pin, and described stop pin is housed in the anti-rotation groove, to limit the radially rotation of described self-locking sleeve pipe.

Preferably, described actuating assembly comprises to be located at the operating parts on the described head capsule and to be located at the interior depression bar of described output shaft, second elastic component that depression bar is moved at axial direction is installed on the described depression bar, described operating parts can be oppressed described pressure shaft to moving down, and drive described locking part when axially moving down around straight line rotation perpendicular to the longitudinal axis of described output shaft.

Preferably, described output shaft is provided with the stop part of the inside that extends into described output shaft, and when described depression bar drove described locking part and moves down under the effect of operating parts, an end of described locking part can abut to stop part.

Preferably, described power tool further comprises the free-ended elastic clamping pieces that is arranged on output shaft, described working head radially is set on the described holder, the free end of described output shaft is provided with the push rod that extends in the described holder, described quick change clamping device can drive described holder along the described relatively pushrod movement of the longitudinal axis of described output shaft, and described push rod can strut described holder and radially clamp described working head.

The beneficial effects of the utility model are: by a locking part is set in the internal chamber of output shaft, the user only need promptly can realize locking part clamping and releasing tightening member by the operation actuating assembly.Thereby can working head be fastened on the output shaft by the better way mode, simplify the mode that to dismantle tightening member originally by instrument, advantage such as have and chucking power is strong simple in structure, easy-to-use.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model power tool first embodiment.

Fig. 2 is the three-dimensional explosive view of power tool shown in Figure 1.

Fig. 3 is the generalized section of the primary importance state of power tool shown in Figure 1, and wherein the quick change clamping device is in clamped position, and the anti-skidding mechanism of working head clamping is in tension position.

Fig. 4 is the generalized section of the second place state of power tool shown in Figure 1, wherein the locking part of the quick change clamping device stop part of just having conflicted.

Fig. 5 is the generalized section of the 4th location status of power tool shown in Figure 1, and wherein the anti-skidding mechanism of working head clamping is in punctured position.

Fig. 6 is the local enlarged diagram of A position among Fig. 3.

Fig. 7 is the local enlarged diagram of B position among Fig. 4.

Fig. 8 is the part section enlarged diagram of the 3rd location status of power tool shown in Figure 1, and wherein the quick change clamping device is in the off-position.

Fig. 9 is the local enlarged diagram of C position among Fig. 5.

Figure 10 is the schematic perspective view of self-locking sleeve pipe among Fig. 2.

Figure 11 is the schematic perspective view of locking part among Fig. 2.

Figure 12 is from the schematic perspective view of lock set among Fig. 2.

Figure 13 is the generalized section from lock set shown in Figure 12.

Figure 14 is the generalized section that cooperates with the chamber of output shaft from lock set among Fig. 2.

Figure 15 is the decomposing schematic representation of the anti-skidding mechanism of working head clamping among Fig. 2.

Figure 16 is the schematic diagram that radially struts tensioning state for the holder of the anti-skidding mechanism of working head clamping among Figure 15.

Figure 17 is the schematic diagram that radial contraction is drawn close state for the holder of the anti-skidding mechanism of working head clamping among Figure 15.

Figure 18 shows that the schematic diagram of locking part and fastener element mated in second embodiment.

Figure 19 shows that the schematic diagram of locking part and fastener element mated in the 3rd embodiment.

Figure 20 shows that the schematic diagram of locking part and fastener element mated in the 4th embodiment.

Shown in Figure 21 is the schematic diagram of locking part and fastener element mated in the 5th embodiment.

Shown in Figure 22 is the schematic diagram of locking part and fastener element mated in the 6th embodiment.

Shown in Figure 23 is the schematic diagram of locking part in the 7th embodiment.

Shown in Figure 24 is the schematic diagram of locking part in the 8th embodiment.

Shown in Figure 25 is the schematic diagram of locking part in the 9th embodiment.

Shown in Figure 26 is the schematic diagram of the anti-skidding mechanism of clamping in the tenth embodiment.

Shown in Figure 27 is the schematic diagram of the anti-skidding mechanism of clamping in the 11 embodiment.

Shown in Figure 28 is the schematic diagram of the anti-skidding mechanism of clamping in the 12 embodiment.

Shown in Figure 29 is the schematic diagram of Figure 28 bottom bracket axle.

Related elements reference numeral in the diagram is as follows:

1. casing 210. depression bars 32. lower houses

100. operating parts 22. vertical portions 320. locking parts

101. first surface of revolution, 220. second elastic components, 321. main bodys

102. second surface of revolution, 23. bearings, 322. pivot connectors

110. cam part 24. bearings 323. perforation

120. pivotal pin 230. baffle plates 324. tight lock parts

130. bracing frame 240. depression bar heads 3241. coats

140. bracing frame 250. depression bar tails 3242. depressed parts

150. handle 260. pads 324 '. tight lock part

151. pivot connector 3. output shafts 324. tight lock part

2. head capsule 300. is from lock set 325. upper inner surfaces

200. 326. times inner surfaces of depression bar assembly 31. upper shells

21. horizontal part 310. self-locking sleeve pipes 327. first grooves

328. first elastic component 430. the 3rd elastic component, 554. coats

33. chamber 440. pins 6. working heads

330. sleeve pipe 450. pads 61. installing holes

34. upper surface 50. tightening members 700. push rods

340. self-locking chamber 501. pressing plates, 701. boss

341. sidewall 502. bar portions 702. the 3rd groove

342. roof 503. auxiliary sections 703. driving members

343. opening 51. tightening members 710. holders

344. installing port 511. pressing plates 711. flange portion

345. anti-rotation groove 512. bar portions 712. the 4th groove

347. second groove, 513. auxiliary sections, 800. push rods

35. lower surface 514. grooves 801. boss

36. shaft shoulder portion 52. tightening members 802. the 3rd groove

37. stop pin 521. pressing plates 803. external screw threads

38. accepting hole 522. bar portions 810. holders

39. pin 523. auxiliary sections 811. flange portion

4. switch 53. tightening members 812. ratchets

400. push rod 531. pressing plates 813. internal threads

401. boss 532. bar portions 900. push rods

402. 533. auxiliary sections, first inclined-plane, 901. boss

410. holder 54. tightening members 910. holders

411. flange portion 541. pressing plates 911. flange portion

412. ratchet 542. bar portions 912. ratchets

413. host cavity 543. auxiliary sections 913. projectioies

414. second inclined-plane, 55. tightening members, 920. axle sleeves

415. installation portion 551. pressing plates 921. guiding grooves

420. hollow shaft housing 552. bar portions 922. tracks

421. inner face 553. auxiliary sections

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and the specific embodiments.

See also Fig. 1 and Fig. 2, a kind of power tool specifically is a kind of oscillating machine, and it comprises casing 1, the head capsule 2 that is connected casing 1 front end (being defined as front end with right side among Fig. 1) and the output shaft 3 that extends that is the lengthwise extension in head capsule 2.Wherein, in casing 1, be provided with motor (not shown), also be provided with unlatching or shutoff that switch 4 is controlled motor on the casing 1.Head capsule 2 comprises and being connected with casing 1 and horizontal part 21 that horizontal direction is provided with in Fig. 1 and the vertical portion 22 of extending downwards from the terminal approximate vertical of horizontal part 21.Output shaft 3 is in the vertical direction setting, and the one end is installed in the head capsule 2, the other end in the vertical portion 22 of head capsule 2 under extend, and can do oscillating motion around self longitudinal axis X, swaying direction is shown in double-head arrow among Fig. 1.

In addition,, also be provided with eccentric wheel (not shown) and pull-fork assembly (not shown) that industry is used always on oscillating machine, be converted into the swing output torque of output shaft 3 in order to rotation output torque motor in the inside of head capsule 2.As shown in fig. 1, can a working head 6 be installed by tightening member 50 at the free end of output shaft 3, working head 6 is a kind of straight blades in the present embodiment, and this working head 6 can be done oscillating motion along the double-head arrow direction among Fig. 1 under the drive of output shaft 3.Tightening member 50 comprises tabular pressing plate 501 and from the upwardly extending bar in the center of pressing plate 501 portion 502, bar portion 502 ends are provided with the auxiliary section 503 with smooth face of cylinder.

See also Fig. 2 and Fig. 3, this oscillating machine comprises and can be used for removing and installing fast the tightening member 50 at output shaft 3 ends at the quick change clamping device of off-position and clamped position conversion.This quick change clamping device comprise be located in the output shaft 3 and can clamp or discharge tightening member 50 from lock set 300 and make locking part 320 clamp or discharge the brake assemblies of tightening member.In the present embodiment, brake assemblies comprises that the operating parts 100 on the horizontal part 21 that is arranged on head capsule 2 reaches and the operating parts 100 optionally connected depression bar assemblies 200 that touch, and comprises self-locking sleeve pipe 310 and the locking part 320 that is housed in the self-locking sleeve pipe 310 from 300 of lock sets.In the present embodiment, output shaft 3 comprises upper shell 31 and lower house 32, and the two is supported by two bearings 23,24 up and down that are positioned at head capsule 2 inside respectively.After upper shell 31 and lower house 32 connect as one, the inside of output shaft 3 just is formed with chamber 33, this chamber 33 has upper surface 34 and the lower surface 35 that is oppositely arranged along axial direction, and the depression bar assembly 200 of above-mentioned quick change clamping device and all be arranged in the chamber 33 of output shaft 3 from lock set 300.

Continue to consult Fig. 2 and Fig. 3, operating parts 100 is a cam spanner, and it comprises handle 150 and cam part 110 that split is provided with, and the end of handle 150 is provided with two parallel relative pivot connectors 151, can drive cam part 110 during rotary handle 150 and rotate together.In addition, two bracing frames 130,140 that are relatively set with on the horizontal part 21 of head capsule 2, the pivot connector 151 of handle 150 is placed between the above-mentioned bracing frame 130,140, cam part 110 further is placed between two pivot connectors 151, by a pivotal pin 120 above-mentioned handle 150 and cam part 110 is articulated in respectively between two bracing frames 130,140 then.This cam part 110 has two arc surface of revolution 101,102 with respect to pivotal pin 120, first surface of revolution 101 wherein apart from the distance of pivotal pin 120 less than the distance of second surface of revolution 102 apart from pivotal pin 120.The user can make this operating parts 100 rotate between two position of rotation by pulling handle 150, on first position of rotation, first surface of revolution 101 of cam part 110 breaks away from depression bar assembly 200, and on second position of rotation, second surface of revolution 102 of cam part 110 contacts with depression bar assembly 200.It is to be noted, first surface of revolution 101 of cam part 110 can not be separated from depression bar assembly 200 yet, but in the rotary course of operating parts 100, contact with depression bar assembly 200 always, as long as first surface of revolution 101 apart from the distance of pivotal pin 120 less than the distance of second surface of revolution 102 apart from pivotal pin 120.

Continue to consult Fig. 2 and Fig. 3, above-mentioned depression bar assembly 200 comprises depression bar 210, second elastic component 220 and is positioned at the pad 260 of second elastic component, 220 belows.Extended to form baffle plate 230 along radial direction on the depression bar 210, by this baffle plate 230, described depression bar 210 can be divided into two parts, and promptly depression bar head 240 that extends on the horizontal part 21 of head capsule 2 and circle diameter are slightly less than the depression bar tail 250 of depression bar head 240.Wherein, after depression bar head 240 extends head capsule 2, be positioned at pivotal pin 120 belows and relative with cam part 110, depression bar tail 250 then and equally is arranged on connecting from lock set 300 of output shaft 3 inside.In addition, second elastic component 220 is set on the depression bar tail 250, and one end and baffle plate 230 connect, and the other end then connects with chamber 33 that is arranged in output shaft 3 and the above-mentioned pad 260 that is set in equally on the depression bar tail 250.Need to prove that in the internal chamber 33 of output shaft 3, also be formed with a shaft shoulder portion 36, pad 260 is arranged in the shaft shoulder portion 36, thereby limits moving axially of second elastic component 220.

Please consult Fig. 3, Fig. 4, Fig. 8 and Fig. 5 successively, operating parts 100 is positioned at the first, second, third and the 4th position of rotation respectively successively.Depression bar assembly 200 is arranged in the internal chamber 33 of output shaft 3, and can move by the axial direction along output shaft 3 along with the turning effort of operating parts 100.As shown in Figure 3, when the user rotates to operating parts 100 on first position of rotation, first surface of revolution 101 is disengaged position with depression bar head 240, at this moment, depression bar 210 moves to the top of the internal chamber 33 of output shaft 3 under the elastic force effect of second elastic component 220, baffle plate 230 contacts with the upper surface 34 of internal chamber 33.As Fig. 4, Fig. 8 and shown in Figure 5, and when the user rotates to operating parts 100 on second position of rotation to the, four position of rotation, second surface of revolution 102 is contact condition all the time with depression bar head 240, in this process, depression bar 210 moves along the axial direction of output shaft 3 away from operating parts 100 under the effect of operating parts 100, and, make second elastic component 220 be contraction state by baffle plate 230 compressions second elastic component 220.

See also Fig. 2, Figure 10 to Figure 13, comprise self-locking sleeve pipe 310 and the locking part 320 that is positioned at self-locking sleeve pipe 310 from lock set 300.This self-locking sleeve pipe 310 roughly is step-like, and it comprises sleeve pipe 330 that roughly is the hollow circular cylinder shape and the self-locking chamber 340 that is connected in sleeve pipe 330 belows and is similarly the hollow circular cylinder shape, and the radial dimension in self-locking chamber 340 is greater than the radial dimension of sleeve pipe 330.The depression bar tail 250 of above-mentioned depression bar 210 is inserted and secured in the sleeve pipe 330, is moving axially thereby can drive sleeve pipe 330.

Self-locking chamber 340 is used to accommodate locking part 320, and it comprises sidewall 341 and roof 342, is formed with circular opening 343 on sidewall 341.With respect to opening 343, be formed with square installing port 344 at the opposite side of sidewall 341, be used for locking part 320 is installed in self-locking chamber 340.This locking part 320 comprises and is flat main body 321, can be inserted in the self-locking chamber 340 from installing port 344.And a side of locking part 320 corresponding opening 343 autonomous agents 321 is extended with pivot connector 322, and this pivot connector 322 can be inserted in the opening 343.The main body 321 of locking part 320 is provided with a perforation that axially runs through 323 along output shaft 3, is used for the insertion of tightening member 50, and 323 the madial wall of boring a hole is provided with tight lock part 324.When the whole axioversion certain angle of locking part 320, tight lock part 324 can be matched with the outer surface of the auxiliary section 503 of tightening member 50, thereby clamp tightening member 50.

It should be noted that in the present embodiment, perforation 323 and off-gauge cylindrical shape, but roughly be interior spindle, specifically be that the radial dimension from two ends to the middle part diminishes gradually.Perforation 323 has and is round table-like and symmetrically arranged upper inner surface 325 and following inner surface 326, and above-mentioned tight lock part 324 is located between upper inner surface 325 and the following inner surface 326 and its inner surface is the smooth face of cylinder.With respect to an end of pivot connector 322, also the axial direction along output shaft 3 is provided with two first grooves 327 side by side on the main body 321 of locking part 320.Relative, also be provided with corresponding respectively being inserted in first groove 327 and second groove 347 of 347, two first elastic components 328 of two second grooves at corresponding first groove 327 on the roof 342 in self-locking chamber 340.By first elastic component 328 is set, can make locking part 320 when original state, remain on the inclination locked position.

In addition, see also Fig. 2, Figure 12 and Figure 14, the outside at the sidewall 341 in self-locking chamber 340 also is provided with anti-rotation groove 345.To should anti-rotation groove 345, in the internal chamber 33 of output shaft 3, also be provided with stop pin 37, this stop pin 37 is housed in the anti-rotation groove 345 always, in order to the radially rotation of restriction from lock set 300.

Also be provided with a stop part that extends in the chamber 33 on the output shaft 3, depression bar 310 is driving when lock set 300 axially moves down under the effect of operating parts 100, one end of locking part 320 can abut to above-mentioned stop part, and then makes locking part 320 move to the upright position vertical with the longitudinal axis of output shaft 3 by obliquity.Specifically see also Fig. 2 and Fig. 3, in the present embodiment, above-mentioned stop part is a pin 39.On lower house 32, be provided with an accepting hole 38 along the bearing of trend of locking part 320, above-mentioned pin 39 is installed in this accepting hole 38.In the axial direction, this pin 39 be positioned at locking part 320 under.

See also Fig. 3 to Fig. 9, the quick change clamping device specific operation process of the utility model power tool is as follows.When this has inserted tightening member 50 in lock set 300 after, be after the bar portion 502 of tightening member 50 is inserted into perforation 323 in the locking part 320, as Fig. 4 and shown in Figure 7, when the user rotates to operating parts 100 on second position of rotation, can make depression bar assembly 200 drive self-locking sleeve pipes 310 moves along the longitudinal axis of output shaft 3 direction away from operating parts 100, at this moment, the main body 321 of locking part 320 and pin 39 produces and contacts and by pin 39 blocks.

As shown in Figure 8, operating parts 100 continues to rotate to the 3rd position of rotation, and compressing depression bar assembly 200 further axially moves down, and then drives from lock set 300 and continue axially to move down; One end of locking part 320 is by pin 39 blocks, 322 of the pivot connectors of the other end continue axially to move down under the drive of self-locking sleeve pipe 310, thereby the straight line that integral body centers on perpendicular to the longitudinal axis of output shaft 3 rotates to horizontal level, and is the upright position state with respect to the longitudinal axis of output shaft 3; At this moment, do not contact between the tight lock part 324 in the perforation 323 of locking part 320 and the auxiliary section 503 of tightening member 50, tightening member 50 is in the state of being released, and can easily be removed from output shaft 3.

As Fig. 3 and shown in Figure 6, and when the user rotates back to operating parts 100 on first position of rotation, depression bar assembly 200 will drive self-locking sleeve pipe 310 and move on axially, and further, by connecting between the pivot connector 322 of locking part 320 and the circular open 343 on the self-locking chamber 340, locking part 320 is also driven move.Simultaneously, owing to be provided with first elastic component 328 between the other end of locking part 320 and the self-locking chamber 340, under the effect of elastic force and the other end of locking part 320 is not produced move, such final result is exactly that locking part 320 returns to the state that is inclination with respect to the longitudinal axis of output shaft 3 in self-locking chamber 340, and and then clamp tightening member 50, and the inclination angle [theta] of locking part 320 horizontal directions is at least 4.7 °.

As shown in figure 11, to produce the clamping force of side direction between the tight lock part 324 in the perforation 323 and the auxiliary section 503 of tightening member 50, simultaneously, the main body 321 of locking part 320 does not produce with pin 39 and contacts, thereby the bar portion 502 with tightening member 50 tightly is clamped on the locking part 320.Need to prove herein, the size of this inclination angle [theta] is according to the concrete size of locking part 320 and tightening member 50 and coefficient of friction between the two and fixed, therefore, the size of inclination angle [theta] can be along with the variation of the concrete size of locking part 320 and tightening member 50 and material and is changed.

Otherwise, when the user rotates to operating parts 100 on the 3rd position of rotation once more, the elastic force that depression bar assembly 200 overcomes second elastic component 220 moves down, driving self-locking sleeve pipe 310 also moves down, make locking part 320 return to level, uninstall the side direction clamping force that produces between the tight lock part 324 of locking part 320 and the tightening member 50, make the tightening member 50 can free axially-movable, dismantle voluntarily by the user.In addition, at second position of rotation that rotates to as Fig. 4 and operating parts 100 shown in Figure 6 between first position of rotation and the 3rd position of rotation, axially move down a segment distance from lock set 300, the main body 321 of locking part 320 produces with pin 39 and contacts, the inclination angle of locking part 320 diminishes, but locking part 320 is the no show upright position still, and the active force between tightening member 50 and the locking part 320 reduces at this moment.

By such quick change clamping device, the user can only just can realize tightening member 50 being mounted to output shaft 3 apace or from output shaft 3 tightening member 50 being disassembled apace by operating operation spare 100, thereby can install or change working head rapidly, facility swift to operate and chucking power are strong.

Please continue to consult Fig. 2, this power tool also comprises an anti-skidding mechanism of working head clamping, is used for after having connected working head 6 on the output shaft 3, prevents because of the installing hole of output shaft 3 and the working head 6 little phenomenon that causes working head 6 to skid of chucking power radially.

See also Figure 15 to Figure 17, the anti-skidding mechanism of this clamping comprises the push rod 400 that extends from the free end of output shaft 3 downwards, be connected the hollow shaft housing 420 of output shaft end and be housed in the above-mentioned axle sleeve 420 and be used for the hollow holder 410 of installment work head.This holder 410 is set on the above-mentioned push rod 400, and axially is provided with the 3rd elastic component 430 between holder 410 and axle sleeve 420, make holder 410 relatively axle sleeve 420 move axially.

Further, push rod 400 ends are extended with the boss 401 of six terrace with edge shapes, and the side of boss 401 forms first inclined-plane 402.It comprises flange portion 411 and the ratchet 412 that extends to 410 of holders under a side direction of flange portion 411 as elastic material, and this ratchet 412 is cylindric substantially, and the footpath upwards is partitioned into six identical five equilibriums of size.The end of ratchet 412 is provided with and is used for installment work 6 and cross section is hexagonal installation portion 415, and the inside of ratchet 412 is formed with the host cavity 413 of six terrace with edge shapes, and the boss 401 of this host cavity 413 and push rod 400 matches to merge and is set in boss 401 outsides.Wherein, with respect to first inclined-plane 402 of push rod 400, be formed with second inclined-plane 414 in the host cavity 413 of holder 410.Axle sleeve 420 has inner face 421, is positioned at pad 450 also is set on the inner face 421 along axial direction.Above-mentioned the 3rd elastic component 430 is set on the ratchet 412, and the one end contacts with the flange portion 411 of holder 410, and the other end then contacts with pad 450 on the inner face 421 of axle sleeve 420.In addition, flange portion 411 pin 440 by the lower surface 35 of one group of inleakage chamber 33 with optionally be connected from lock set 300 generations, holder 410 can be moved along axial direction.The bottom of pin 440 is resisted against the upper surface of the flange portion 411 of holder 410, and its top is then relative with the bottom from the self-locking sleeve pipe 310 of lock set 300.By above structure, thereby the outer radial dimension of installation portion 415 of ratchet 412 that can make holder 410 is at the first radial dimension A that clamps working head 6 with discharge between the second radial dimension B of working head 6 and change.

Please refer to Fig. 3 and Figure 16, when operating parts 100 is positioned on first position of rotation, be disengaged position from the self-locking sleeve pipe 310 and the pin 440 of lock set 300, and tightening member 50 is clamped.At this moment, holder 410 is under the effect of the 3rd elastic component 430, its second inclined-plane 411 is close on first inclined-plane 402 of push rod 400, thereby the installation portion 415 that makes the ratchet 412 of holder 410 is kept maximum outer radial dimension diametrically, the i.e. first radial dimension A, and then can apply maximum side direction active force to the installing hole 61 of working head 6, prevent that working head 6 side direction when swing from skidding.

As Fig. 9 and shown in Figure 17, after the user pulls operating parts 100 and rotates to the 4th position of rotation, depression bar assembly 200 will drive from lock set 300 and further axially move down.After axially moving down certain distance from lock set 300, the bottom of its self-locking sleeve pipe 310 will contact with the top of pin 440, and by pin 440 pressure is passed to holder 410, and then drive holder 410 axially moves down.After holder 410 axially moves down, keep transfixion because push rod 400 is axially gone up, second inclined-plane 411 of holder 410 will be separated from first inclined-plane 402 of push rod 400.And, because the elasticity of the ratchet 412 of holder 410 self, after first inclined-plane 402 of second inclined-plane 411 of holder 410 and push rod 400 breaks away from, ratchet 412 is contracted to original state, the outer radial dimension of the installation portion 415 of ratchet 412 becomes the second minimum radial dimension B, and ratchet 412 is applied to that the side direction active force of installing hole 61 of working head 6 is unloaded immediately to be fallen.At this moment, the user at first takes off tightening member 50, just can like a cork working head 6 be taken off from holder 410 then.

Otherwise, when the user need reinstall the working head 6 after the unloading, only need when operating parts 100 is positioned at second position of rotation, at first working head 6 is mounted to the end of holder 410, then tightening member 50 is inserted in the output shafts 3 in lock set 300; And then operating parts 100 pulled to first position of rotation, in this process, operating parts 100 is cancelled the active force to depression bar assembly 200, under the effect of second elastic component 220, depression bar assembly 200 will drive from lock set 300 and move to initial position on axially, and the bottom of self-locking sleeve pipe 310 will be separated gradually with the top of pin 440; 410 elastic force effect lower shafts at the 3rd elastic component 430 of holder upwards move, fitted gradually with first inclined-plane 402 of push rod 400 once more in its second inclined-plane 411, the ratchet 412 of holder 410 can strut by the boss 401 by push rod 400 gradually diametrically, thereby the installing hole 61 by 415 pairs of working heads 6 of installation portion applies enough big side direction clamping force and clamps working head 6, and then prevent working head 6 at work and 410 of holders relatively rotate, guarantee that output shaft 3 passes to working head 6 with driving torque better by holder 410, make working head 6 have higher operating efficiency.

In above-mentioned first embodiment, the inner surface of the tight lock part 324 of the locking part 320 of quick change clamping device is the smooth face of cylinder, and tightening member 50 has the smooth face of cylinder equally with the auxiliary section 502 that tight lock part 324 connects.The utility model locking part is not limited to above-mentioned embodiment with cooperating of tightening member, below in conjunction with Figure 18 to Figure 23 other embodiment of the present utility model is further specified.

See also shown in Figure 180ly, the utility model second embodiment and the above-mentioned first embodiment structure are basic identical, and difference only is tightening member 51.In the present embodiment, tightening member 51 comprises tabular pressing plate 511 equally and from the upwardly extending bar in the center of pressing plate 511 portion 512, bar portion 512 ends are provided with the auxiliary section 513 that cooperates with the tight lock part 324 of above-mentioned locking part 320 equally.Difference is, auxiliary section 513 offered some grooves 514 in a circumferential direction, when tightening member 51 was clamped by the tight lock part 324 of locking part 320, tight lock part 324 was held in the groove 513 just.By auxiliary section 512 these grooves 513 are set, can guarantee when clamped position, between the tight lock part 324 of tightening member 51 and locking part 320 bigger axial force is arranged, thereby prevent tightening member 51 from skidding and move axially at tightening member 51.

See also Figure 19, in the utility model the 3rd embodiment, be tightening member 52 equally with the first embodiment difference.In the present embodiment, tightening member 52 comprises tabular pressing plate 521 equally and from the upwardly extending bar in the center of pressing plate 521 portion 522, bar portion 522 ends are provided with the auxiliary section 523 that cooperates with the tight lock part 324 of above-mentioned locking part 320 equally.Difference is, the shape of auxiliary section 523 is not cylindrical, but from two ends to the diminishing receipts waist of mid diameter shape, can increase the axial force between the tight lock part 324 of auxiliary section 523 and locking part 320 equally, thereby prevent tightening member 52 from skidding and move axially.

See also Figure 20, in the utility model the 4th embodiment, be tightening member 53 equally with the aforementioned embodiments difference.In the present embodiment, tightening member 53 comprises pressing plate 531 equally and from the upwardly extending bar in the center of pressing plate 531 portion 532, bar portion 532 ends are provided with the auxiliary section 533 that cooperates with the tight lock part 324 of above-mentioned locking part 320 equally.Difference is that auxiliary section 533 tip size of tightening member 53 are less, and the middle part is that grape wine is barrel-shaped, and this kind structure can make in the perforation 323 of bar portion 532 easier insertion locking parts 320 of tightening member.

See also Figure 21, in the utility model the 5th embodiment, be tightening member 54 equally with the aforementioned embodiments difference.In the present embodiment, tightening member 54 comprises tabular pressing plate 541 equally and from the upwardly extending bar in the center of pressing plate 541 portion 542, bar portion 542 ends are provided with the auxiliary section 543 that cooperates with the tight lock part 324 of above-mentioned locking part 320 equally.Difference is that the auxiliary section 543 of tightening member 54 roughly is truncated cone-shaped, and this kind structure can increase the axial force between the tight lock part 324 of auxiliary section 543 and locking part 320 equally, prevents that tightening member 54 from skidding and move axially.

See also Figure 22, in the utility model the 6th embodiment, tightening member 55 is different with aforementioned embodiments with locking part 320.In the present embodiment, tightening member 55 comprises tabular pressing plate 551 equally and from the upwardly extending bar in the center of pressing plate 551 portion 552, bar portion 552 ends are provided with the auxiliary section 553 that cooperates with the tight lock part 324 of above-mentioned locking part 320 equally.Difference is, the interior table of the outer surface of the auxiliary section 553 of tightening member 55 and the tight lock part 324 of locking part 320 is coated with frictional layer 554,3241 respectively, to increase the clamping force between tight lock part 324 and the auxiliary section 553, prevent that tightening member 55 from skidding and move axially.

See also Figure 23 to Figure 25, be respectively the 7th to the 9th embodiment of the present utility model.As shown in figure 23, in the 7th embodiment, further offer depressed part 3242 on the inner surface of the tight lock part 324 of locking part 320, so that the active force between the auxiliary section of increase tight lock part 324 and tightening member.As shown in figure 24, in the 8th embodiment, the tight lock part 324 of locking part 320 ' the non-smooth face of cylinder of inner surface, but the part spherical that outwards protrudes; Equally, as shown in figure 25, in the 9th embodiment, the tight lock part 324 of locking part 320 " inner surface be round table-like, tight lock part 324 ' and 324 " all can be with cooperating well between the auxiliary section of tightening member.

In the above-mentioned embodiment, show the multiple respective outer side edges mode of the auxiliary section of the tight lock part of the utility model locking part and tightening member respectively.Except that above fit system, can be provided with internal thread on the inner surface of the tight lock part of locking part, correspondingly, the outer surface of the auxiliary section of tightening member is provided with external screw thread, locking part is when the inclination locked position, internal thread and external screw thread are matched, thereby make the tight lock part of locking part can stably clamp the auxiliary section of tightening member.

Be appreciated that the anti-skidding mechanism of clamping in the utility model also is not limited to the structure that is adopted in the above-mentioned embodiment.As long as holder can be on the longitudinal axis of output shaft pushrod movement relatively, holder is strutted by push rod and have the first bigger radial dimension and have the second less radial dimension to clamp working head or contraction and get final product to discharge working head.Respectively the anti-skidding mechanism of clamping in the utility model the tenth embodiment to the 12 embodiments is described further below in conjunction with Figure 26 to Figure 29.

See also Figure 26, in the utility model the tenth embodiment, the boss 701 of push rod 700 ends is round table-like, rather than six terrace with edge shapes.Offer on the sidewall of the lower house 32 of output shaft the driving member 703 that partly extends the 3rd groove 702 in the axial direction further is installed in the 3rd groove 702, the three grooves 702.The 3rd groove 702 of corresponding lower house 32 is provided with the 4th groove 712 on the flange portion 711 of holder 710, and after the assembling, driving member 703 parts stretch in the 4th groove 712.In first embodiment, the boss 401 of push rod 400 ends is six terrace with edge shapes, and the lower house 32 of output shaft passes to holder 410 by boss 401 with moment of torsion.In the present embodiment, the lower house 32 of output shaft passes to holder 710 by driving member 703 with moment of torsion.

See also Figure 27, in the utility model the 11 embodiment, be not provided with as quick change clamping device, axle sleeve 420 and the 3rd elastic component 430 and pad 450 in first embodiment.In the present embodiment, the anti-skidding mechanism of clamping only comprises the push rod 800 and the elastic clamping pieces 810 of lower house 32 ends that are arranged on output shaft.Push rod 800 ends are provided with truncated cone-shaped boss 801, and the top of push rod 800 is provided with external screw thread 802.Holder 810 comprises flange portion 811 and ratchet 812, and the madial wall of holder 810 is provided with the internal thread 813 that can cooperate with the external screw thread 802 of push rod 800.Holder 810 cooperates with the external screw thread 802 of push rod 800 by internal thread 813 and is connected on the push rod 800,810 of rotary clamps can make holder 810 move up and down along the longitudinal axis of output shaft, thereby the boss 801 that makes push rod 800 cooperates with the ratchet 812 of holder 810 or separates, cause ratchet 812 to be strutted or shrink, and then can clamp or discharge working head (not shown) diametrically.

Please refer to Figure 28 and Figure 29 below, in the utility model the 12 embodiment, be not provided with as quick change clamping device, the 3rd elastic component 430 and pad 450 in first embodiment.In the present embodiment, the anti-skidding mechanism of clamping comprise lower house 32 ends that are arranged on output shaft push rod 900, be connected the axle sleeve 920 of lower house 32 ends and be set in push rod 90 peripheral and be housed in holder 910 in the axle sleeve 920.Wherein, axle sleeve 920 can radially rotate relative to lower house 32, the spiral path 922 that axially offers guiding groove 921 on the madial wall of axle sleeve 920 and radially be provided with and be communicated with guiding groove 921.Holder 910 comprises flange portion 911 and the ratchet 912 that extends from flange portion 911 1 sides, and the lateral wall of ratchet 912 is provided with projection 913.Projection 913 can be housed in guiding groove 921 and the track 922, and can slide in guiding groove 921 and track 922.

During assembling, at first make the projection 913 of holder 910 and the guiding groove 921 of axle sleeve 920 align and axially slip in the guiding groove 921, thereby holder 910 is housed in the axle sleeve 920.The axle sleeve 920 that will carry holder 910 then is connected to the free end of lower house 32, and this moment, the madial wall of holder 910 can cooperate with the terrace with edge shape boss 901 of push rod 900, and the radially rotation of holder 910 is limited by boss 901.Then, working head (not shown) is installed on the ratchet 912 of holder 910, axle sleeve 920 then turns clockwise, thereby the projection 913 of holder 910 is slided in the track 922 of axle sleeve 920, impel holder 910 to move on axially simultaneously, and then holder 910 is cooperated with the boss 901 of push rod 900 and strutted, thereby the radial dimension of the ratchet 912 of holder 910 is increased and clamp working head diametrically.Obviously, after working head is radially clamped, axle sleeve 920 is rotated counterclockwise, 910 of holders are driven by axle sleeve 920 and axially move down and separate with push rod 900, thereby the radial dimension of ratchet 912 is diminished to discharge working head again.

Claims (12)

1. power tool, comprise head capsule, in described head capsule, extend and be used to drive the output shaft of working head and be installed on the described output shaft and be used for fixing the tightening member of described working head, this tightening member is provided with the bar portion that extends in the described output shaft, this power tool also comprises the quick change clamping device, described quick change clamping device comprises locking part of being located in the described output shaft and the actuating assembly that locking part is moved relative to described tightening member, it is characterized in that: described locking part is provided with the hole, the hole of described locking part is passed by the bar portion of described tightening member, described actuating assembly drives described locking part around the straight line rotation perpendicular to the longitudinal axis of described output shaft, thus the off-position that the hole of described locking part selectively connects the clamped position that makes described locking part that described tightening member is in to be clamped in the described output shaft and can be removed in the described output shaft with the bar portion of described tightening member.

2. power tool as claimed in claim 1, it is characterized in that: described locking part comprises and is flat main body, described main body is axially run through in described hole, the madial wall in described hole is provided with tight lock part, described locking part cooperates with the bar portion of described tightening member by described tight lock part, to clamp or the release tightening member.

3. power tool as claimed in claim 2, it is characterized in that: described locking part has and vertical two positions with respect to the longitudinal axis of output shaft, when obliquity, the bar portion of the tight lock part of described locking part and described tightening member is inconsistent and clamp described tightening member; When the upright position, the bar portion of the tight lock part of described locking part and described tightening member is separated and discharges described tightening member.

4. power tool as claimed in claim 3, it is characterized in that: described tightening member comprises pressing plate, described bar portion extends axially from the center of pressing plate, described bar portion offers some grooves in a circumferential direction, when tightening member was clamped by described locking part, the tight lock part of described locking part was held in the described groove just.

5. power tool as claimed in claim 2, it is characterized in that: the radial dimension in the hole of described locking part diminishes gradually from two ends to the middle part, described hole has and is round table-like and symmetrically arranged upper inner surface and following inner surface, and described tight lock part is located between upper inner surface and the following inner surface.

6. as each described power tool of claim 1 to 5, it is characterized in that: described power tool further comprises the self-locking sleeve pipe, described self-locking sleeve pipe comprises sleeve pipe and is connected in the self-locking chamber of sleeve pipe below, described locking part is housed in the described self-locking chamber, described self-locking chamber comprises sidewall and roof, side at described sidewall offers opening, and at the opposite side formation installing port relative with described opening of described sidewall, described locking part is provided with the pivot connector that is housed in the described opening.

7. power tool as claimed in claim 6 is characterized in that: be provided with first elastic component between the roof of end relative with pivot connector and self-locking sleeve pipe on the main body of described locking part.

8. power tool as claimed in claim 7 is characterized in that: described first elastic component is that two and described relatively pivot connector are symmetrical arranged, so that described locking part remains in the self-locking chamber of described self-locking sleeve pipe reposefully.

9. swing instrument as claimed in claim 8, it is characterized in that: the arranged outside of the sidewall in described self-locking chamber has anti-rotation groove, the inside of described output shaft also is provided with stop pin, and described stop pin is housed in the anti-rotation groove, to limit the radially rotation of described self-locking sleeve pipe.

10. power tool as claimed in claim 1, it is characterized in that: described actuating assembly comprises to be located at the operating parts on the described head capsule and to be located at the interior depression bar of described output shaft, second elastic component that depression bar is moved at axial direction is installed on the described depression bar, described operating parts can be oppressed described pressure shaft to moving down, and drive described locking part when axially moving down around straight line rotation perpendicular to the longitudinal axis of described output shaft.

11. power tool as claimed in claim 10, it is characterized in that: described output shaft is provided with the stop part of the inside that extends into described output shaft, when described depression bar drove described locking part and moves down under the effect of operating parts, an end of described locking part can abut to stop part.

12. power tool as claimed in claim 1, it is characterized in that: described power tool further comprises the free-ended elastic clamping pieces that is arranged on output shaft, described working head radially is set on the described holder, the free end of described output shaft is provided with the push rod that extends in the described holder, described quick change clamping device can drive described holder along the described relatively pushrod movement of the longitudinal axis of described output shaft, and described push rod can strut described holder and radially clamp described working head.

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