CN103182707B

CN103182707B - Power tool

Info

Publication number: CN103182707B
Application number: CN201110447974.0A
Authority: CN
Inventors: 张士松; 庞晓丽; 徐静涛; 吴宇
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2016-03-16
Anticipated expiration: 2031-12-28
Also published as: CN103182707A

Abstract

The present invention discloses a kind of power tool with quick-locking mechanism.This power tool comprises: housing; Output shaft, for installing and driving working head work, described output shaft is provided with the carrier extending described housing; Fixture, for being fixed on the carrier of described output shaft by described working head; Retaining mechanism, for locking or discharging described fixture; And driving mechanism, move between locked position and off-position for making described retaining mechanism.The driven member that described driving mechanism comprises driving link and coordinates with described driving link, mobile described driving link, described driven member can be driven to move axially, and then drive described retaining mechanism to move axially, when locked position, described retaining mechanism is supported by described driven member, and described driven member is supported by described driving link, thus can prevent fixture from getting loose, with stably steady job head.

Description

Power tool

Technical field

The present invention relates to a kind of power tool, especially a kind of power tool of hand-held.

Background technology

Multi Role Aircraft is the common hand-held swing-type power tool of industry, and to be output shaft do oscillating motion around self axial line for its operation principle.Therefore, after user is provided with different working heads on the free end of output shaft, after straight blade, saw blade, triangle frosted dish, spade-type scraper, multiple different operating function can be realized, as sawed, cutting, grind, scrape, to adapt to different work requirements.

China's No. CN100574993Cth, issued patents, discloses a kind of swing-type power tool with quick clamping mechanism.This swing-type power tool comprises: for the work arbor of driven tool, and described instrument can be fastened between the retaining part in the tool end of tightening member and described work arbor; For the mobile device making described tightening member slide between off-position and clamped position.

In this off-position, described tightening member can be removed from described work arbor; And in this clamped position, described tightening member leans on described retaining part by spring element folder.Wherein, described tightening member comprises clamp shaft, and this clamp shaft can be inserted in described work arbor, and remains in described clamped position by the retaining mechanism in described work arbor, and can be removed when being in described off-position.Described retaining mechanism has the clamping component that can radially move.

Described retaining mechanism has the collar, clamping component can be held against this collar with moving radially, described clamping component is maintained in the recess of the described collar, described clamping component has inclined surface on its side towards described instrument, described inclined surface coordinates with the inclined surface on the described collar, thus make the described collar against the described inclined surface of described clamping component, thus drive clamping component radial motion and clamp the clamp shaft of tightening member, realize the Quick-clamped to tightening member or release.

But in above-mentioned swing-type power tool, moving assembly is the operation spanner that can rotate around the axis perpendicular to output shaft.When operation spanner turns to enable possition, rely on the cam surface extruding thrust component on spanner, and then axially move down after making retaining mechanism overcome spring force, realize the release to tightening member.During clamping tightening member, then need again spanner to be rotated back to closing position by enable possition, now retaining mechanism axially moves under the effect of spring force, and Quick-clamped tightening member.Owing to being to provide axial pressing force by the elastic force of spring, therefore, when external load is larger, axially downward external force has exceeded the axial thrust upwards that spring can provide, firm element can be made axially to move down together with after pressing spring under retaining mechanism certain, thus cause forming gap between tightening member and instrument, make loosening tool, and then occur skidding, affect operating efficiency.In addition, the quick clamping mechanism of this power tool, needs the spanner of a large-size, and all needs when discharging or clamp tightening member to pull spanner rotation, complex steps.

Therefore, the power tool that a kind of improvement is provided is necessary, to solve the problem in fact.

Summary of the invention

An object of the present invention is to provide a kind of power tool, and working head can be installed on output shaft by reliable mode by this power tool, and without the need to using the aids such as such as spanner, and occur when can prevent working head element manipulation skidding.

For achieving the above object, the technical solution adopted in the present invention is as follows:

A kind of power tool, comprising:

Housing;

Output shaft, for installing and driving working head work, described output shaft is provided with the carrier extending described housing;

Fixture, for being fixed on the carrier of described output shaft by described working head;

Retaining mechanism, for locking or discharging described fixture; And

Driving mechanism, for making described retaining mechanism move between locked position and off-position, at described locked position, described fixture is clamped on described output shaft; In described off-position, described fixture can be removed from described output shaft;

Wherein, the driven member that described driving mechanism comprises driving link and coordinates with described driving link, mobile described driving link, described driven member can be driven to move axially, and then drive described retaining mechanism to move axially, when locked position, described retaining mechanism is supported by described driven member, and described driven member is supported by described driving link.

Preferably, described driving link and described driven member by be located at least both one of on first field of conjugate action coordinate, when described driving link rotates, drive described driven member to move axially by described first field of conjugate action.

Preferably, described first field of conjugate action is plane.

Preferably, described first field of conjugate action is perpendicular to the axis of described output shaft.

Preferably, the axis of described first field of conjugate action and described output shaft acutangulates.

Preferably, described first field of conjugate action is cam surface.

Preferably, described driving link around described output shaft axis or be parallel to described output shaft axis straight line rotate.

Preferably, described driving link rotates around the straight line of the axis perpendicular to described output shaft.

Preferably, described first field of conjugate action is arranged on described driving link, described driven member is provided with second field of conjugate action engaged with described first field of conjugate action.

Preferably, described second field of conjugate action is obliquely installed relative to the axis of described output shaft, at least comprises adjacent quick fraction and low speed segment, and the lift angle of described quick fraction is greater than the lift angle of described low speed segment.

Preferably, described first field of conjugate action is obliquely installed, and its lift angle equals the lift angle of the low speed segment of described second field of conjugate action.

Preferably, described driving link and described driven member are all in cylindric, and described first field of conjugate action is formed in described driving link or described driven member circumferentially.

Preferably, described driving mechanism also comprises actuator, rotates described actuator and described driving link can be driven to rotate.

Preferably, described driving link is provided with the first limiting section, and described driven member is provided with the second limiting section, and when retaining mechanism is positioned at locked position, described first limiting section coordinates with described second limiting section, limits the rotation of described driving link.

Preferably, when described locked position, described retaining mechanism is by described driving mechanism rigid support, and the axial distance between the carrier of the relatively described output shaft of described retaining mechanism remains unchanged.

Preferably, described driving mechanism is provided with the first elastic component, and described first elastic component provides the elastic force that can drive the relatively described output shaft rotation of described driving link.

By arranging driving mechanism, when not adopting other aid, fast driving locking member and fixture are locked or are thrown off, and realize Fast Installation or the dismounting of working head.In addition, the driven member that driving mechanism comprises driving link and coordinates with driving link, when locked position, retaining mechanism is supported by driven member, driven member is supported by driving link, thus fixture can be avoided to occur when larger load to loosen, thus ensures working head stability in use.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view of first embodiment of the invention medium power instrument.

Fig. 2 is the schematic perspective view of subelement in power tool shown in Fig. 1.

Fig. 3 is the structural representation of the driven member in first embodiment of the invention.

Fig. 4 is the perspective exploded view of the subelement of power tool shown in Fig. 2.

The subelement that Fig. 5 is power tool shown in Fig. 2 is in the schematic perspective view of primary importance, and now retaining mechanism is in off-position.

Fig. 6 is the sectional view of the subelement of power tool shown in Fig. 5.

The subelement that Fig. 7 is power tool shown in Fig. 2 is in the schematic perspective view of the second place, and now retaining mechanism is between off-position and locked position.

Fig. 8 is the sectional view of the subelement of power tool shown in Fig. 7.

The subelement that Fig. 9 is power tool shown in Fig. 2 is in the schematic perspective view of the 3rd position, and now retaining mechanism is in locked position, and working head is not yet clamped.

Figure 10 is the sectional view of the subelement of power tool shown in Fig. 9.

The subelement that Figure 11 is power tool shown in Fig. 2 is in the schematic perspective view of the 4th position, and now retaining mechanism is in locked position, and working head is clamped.

Figure 12 is the sectional view of the subelement of power tool shown in Figure 11.

Figure 13 is the schematic perspective view that the subelement of second embodiment of the invention medium power instrument is in primary importance, and now retaining mechanism is in locked position.

The subelement that Figure 14 is power tool shown in Figure 13 is in the schematic perspective view of the second place, and now retaining mechanism is in off-position.

Figure 15 is the schematic perspective view that third embodiment of the invention medium power instrument is in primary importance, and now retaining mechanism is in off-position.

The subelement that Figure 16 is power tool shown in Figure 15 is in the schematic perspective view of the second place, and now retaining mechanism is in locked position.

Figure 17 is the perspective exploded view of the subelement of power tool shown in Figure 15.

The subelement that Figure 18 is power tool shown in Figure 15 is in the structural representation of primary importance.

The subelement that Figure 19 is power tool shown in Figure 15 is in the structural representation of the second place.

Related elements reference numeral in diagram is as follows:

100. Multi Role Aircraft 322. hypomere 346. accepting holes

1. casing 323. flank 347. stop section

2. head capsule 324. the 3rd elastic component 348. groove

21. horizontal part 33. axle sleeve 4. switches

22. vertical portion 331. depressed part 51. installation portions

Protruding 511. centre bores of 23. ball bearing 332.

24. sealed-bearing 34. axle bed 512. installing holes

3. output shaft 341. carrier 52. cutting part

31. axis body 342. diapire 53. connecting portions

311. blind hole 343. overcoat 6. retaining mechanisms

32. shaft-cup 344. projection 61. locking members

321. epimere 345. inner sleeve 611. heads

612. accommodation hole 738. opening 916. stop sections

613. locking hole 739. perforate 917. carriers

62. second elastic component 8. fixture 92. retaining mechanisms

71. actuator 81. pressing plate 921. locking members

711. main body 82. bar portion 922. second elastic components

712. spanner portion 10. driving mechanism 923. locking holes

713. breach 11. driving link 93. driving mechanisms

714. the 4th elastic component 111. first field of conjugate action 930. first elastic components

72. driving link 112. first depressed part 931. actuators

721. body 113. protuberance 932. driving links

722. protuberance 12. driven member 933. driven members

723. support portion 121. second field of conjugate action 934. arms

724. upper surface 122. second depressed parts 9341. are slotted

725. first field of conjugate action 141. axle bed 935. axle portions

The flat quadrate part of 726. first elastic component 142. carrier 9351.

727. first limiting section 143. stop section 936. cam part

73. driven member 15. fixture 9361. low sides

731. coordinate section 16. working head 9362. high-end

732. accommodating section 17. retaining mechanism 9363. first fields of conjugate action

733. guide rod 171. locking member 937. sections of cooperation

734. matrix 172. second elastic component 9371. engaging pieces

7341. rib 90. head capsule 9372. second fields of conjugate action

7342. lower surface 900. Multi Role Aircraft 938. accommodating section

7343. second limiting section 91. output shaft 9381. host cavities

735. engaging piece 911. axis body 939. the 3rd elastic components

736. second field of conjugate action 912. shaft-cup 94. working heads

7361. quick fraction 913. axle sleeve 95. fixtures

7362. low speed segment 914. axle bed 951. pressing plates

737. host cavity 915. through hole 952. bar portions

Detailed description of the invention

Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.

Power tool of the present invention comprises housing, the output shaft be arranged in housing, the fixture be fixed on by working head on output shaft, be used for locking or discharging retaining mechanism and the driving mechanism of fixture.Driving mechanism can be changed between the first position and the second position, and then retaining mechanism is moved between locked position and off-position.At locked position, fixture is clamped on the carrier of output shaft; In off-position, fixture can be removed from output shaft.Thus when without the need to external auxiliary instrument, working head can be changed rapidly.

The more important thing is, the driven member that driving mechanism comprises driving link and coordinates with driving link, mobile driving link, driven member can be driven to move axially, and then drive retaining mechanism to move axially, when locked position, retaining mechanism is supported by described driven member, and driven member is supported by driving link.This structure, will make working head fixture stably be fixed on output shaft, and when avoiding external loading excessive, occur gap and get loose between working head and fixture, thus occur skidding when can prevent working head from working, and greatly increase work efficiency.

After " rigid support " that it may be noted that in this description refers to that retaining mechanism driven-mechanism supports, under axial force effect, axially can not there is deformation, can not be elastically compressed in driving mechanism.

Detailed description of the invention one

The power tool related in present embodiment is a kind of oscillating-type power tool specifically, also known as Multi Role Aircraft.But the present invention is not limited to swing-type power tool, also can be rotation grinding power tool, as sander or electric angle grinder etc.

Refer to Fig. 1, a kind of power tool, specifically a kind of Multi Role Aircraft 100, it output shaft 3 comprising the casing 1 extended in lengthwise, the head capsule 2 being connected to casing 1 front end (being defined as front end with left side in Fig. 1) and extend in head capsule 2.Wherein, in casing 1, be provided with motor (not shown), casing 1 be also provided with switch 4 to control unlatching or the shutoff of motor.Head capsule 2 comprises and to be connected with casing 1 and the horizontal part 21 arranged along horizontal direction in Fig. 1 and from the vertical portion 22 that the end of horizontal part 21 extends substantially vertical downward.Output shaft 3 is arranged at vertical direction, and its one end is arranged in head capsule 2, and the other end goes out to downward-extension in the vertical portion 22 of head capsule 2, and can do oscillating motion around the longitudinal axis X of self, and swaying direction is as shown in double-head arrow in Fig. 1.

In addition, in the inside of head capsule 2, be also provided with industry on oscillating machine the eccentric part (not shown) commonly used and pull-fork assembly (not shown), in order to the rotation output torque of motor to be converted into the swing output torque of output shaft 3.When eccentric part rotates, by with the coordinating of pull-fork assembly, its rotational motion is changed into the oscillating motion of output shaft 3 relative to himself axis X, and angle of oscillation is between about 0.5 to 7 degree, hunting frequency scope can be set to 5000 to 30000 times about per minute.By fixture (hereinafter having a detailed description), a working head 5 is installed at the free end of output shaft 3, in present embodiment, working head 5 is a kind of straight blades, and this working head 5 can do oscillating motion along the double-head arrow direction in Fig. 1 under the drive of output shaft 3.

Compared with rotation power tool, when Multi Role Aircraft 100 works, output shaft 3 rotates oscillating traverse motion around himself axis X, thus produces larger sudden change moment of torsion along the both direction swung.Therefore, need very large axial chucking power to guarantee to remain on output shaft 3 by above-mentioned working head 5 under all conditions of work, can't occur skidding and affecting operating efficiency and maybe cannot work.

As shown in Figures 2 to 4, the axis X place straight line of output shaft 3 is defined as longitudinal direction, and the direction vertical with axis X is defined as transverse direction, and under the bottom of paper is, the top of paper is upper.Description hereinafter all adopts definition herein.Multi Role Aircraft 100 also comprises and is arranged on retaining mechanism 6 in output shaft 3 and driving mechanism 7, after retaining mechanism 6 and driving mechanism 7 match, can realize clamping or discharge fixture 8 rapidly, thus Fast Installation or dismantlement work 5.

Output shaft 3 is hollow form, and it is housed in head capsule 2, is axially supported at and is installed in parallel between ball bearing 23 in head capsule 2 and sealed-bearing 24.In present embodiment, output shaft 3 is made up of four elements from top to bottom: axis body 31, shaft-cup 32, axle sleeve 33 and axle bed 34, obviously, can not relatively rotate, to transmit driving torque between these four elements.Wherein, axis body 31 is cylindric, is connected with shaft-cup 32 by pin (not shown), and its one end towards working head 5 axially offers blind hole 311.Shaft-cup 32 is hollow form, and epimere 321 is the hollow cylindrical of collecting axis body 31, and hypomere 322 is similarly hollow cylindrical, and just radial dimension is larger.On the outer surface of hypomere 322, radial protrusion is extended with spaced some flanks 323, coordinates, to transmit driving torque with axle sleeve 33.Axle sleeve 33 is similarly hollow cylindrical, its madial wall is arranged some depressed parts 331 of the flank 323 of collecting axle sleeve 32, bottom is axially downwards protruded and is extended with two symmetrically arranged protruding 332, by protruding 332 with the coordinating of axle bed 34, driving torque is passed to axle bed 34.

Axle bed 34 is positioned at the lowermost end of output shaft 3, it has carrier 341, carrier 341 comprises circular bottom wall 342, the hollow cylindrical overcoat 343 that axially upwards extends to form from the outward flange of diapire 342 and from the lower surface of diapire 342 axially to the projection 344 of some circle distribution of downward-extension.Axle bed 34 also comprises the hollow cylindrical inner sleeve 345 upwards extended from the middle part of carrier 341 and the accepting hole 346 running through carrier 341 and inner sleeve 345, and wherein, the top of inner sleeve 345 is upwards extended with for stopping the stop section 347 that retaining mechanism 6 axially moves down.The inwall of the overcoat 343 of carrier 341 is symmetrically formed two grooves 348, for just accommodating two projections 332 of axle sleeve 33, to transmit driving torque.

It may be noted that, output shaft of the present invention is not limited to the concrete structure in present embodiment, its central axis 31, shaft-cup 32, axle sleeve 33, axle bed 34 4 can transmit driving torque by arranging flat square structure between any two, axis body 31, shaft-cup 32, axle sleeve 33 3 elements can be arranged to an integrated element, and can not affect the performance of whole machine.

Working head 5 is a kind of straight blade, for a person skilled in the art, is easy to expect, working head 5 also can be other annex, as saw blade, emery disc, scraper etc.This working head 5 horizontally set, it has for being arranged on tabular installation portion 51 on output shaft 3, for the cutting part 52 that cuts and the connecting portion 53 between installation portion 51 and cutting part 52.Wherein, installation portion 51 offers centre bore 511, be arranged with some installing holes 512 coordinated with the projection 344 of output shaft 3 at the outer of centre bore.

Fixture 8 is for being fixed on the end of output shaft 3 by working head 5.Fixture 8 through the installation portion 51 of working head 5, and then is connected to the end of output shaft 3.It comprises the ring-type pressing plate 81 being positioned at bottom and the bar portion 82 axially upwards extended from the middle part of pressing plate 81, and the end in bar portion 82 is provided with teeth portion 82, and teeth portion 82 can be external screw thread, also can be other dentalation.

During installation, the bar portion 82 of fixture 8 is through after the accepting hole 346 of output shaft 3, and the mechanism 6 that can be locked clamps, thus is clamped between the diapire 344 of output shaft 3 and base plate 81 by the installation portion 51 of working head 5.

Below in conjunction with Fig. 2 to Fig. 4, describe the concrete structure of retaining mechanism 6 and driving mechanism 7 in detail.Retaining mechanism 6 can be changed between locked position and off-position, and when locked position, fixture 8 is clamped in retaining mechanism 6; When off-position, fixture 8 mechanism 6 that is locked discharges, thus can shift out in output shaft 3.In present embodiment, by operation driving mechanism 7, retaining mechanism 6 can be moved to off-position by locked position, now fixture 8 can be shifted out in output shaft 3; During mounting fixing parts 8, Manual press fixture 8, driving mechanism 7 can automatically return to its initial position, makes retaining mechanism 6 remain on locked position.

Driving mechanism 7 comprises actuator 71, driving link 72 and driven member 73, wherein actuator 71 is set in the periphery of output shaft 3 Upper shaft sleeve 33, driving link 72 and driven member 73 are arranged in output shaft 3, be housed in the receiving space of axle sleeve 33 and shaft-cup 32 formation, and final between retaining mechanism 6 and the carrier 341 of output shaft 3.Actuator 71 operationally rotates around the axis X of output shaft 3, and driving link 72 can be driven to rotate around the axis X of output shaft 3 equally, drives driven member 73 axially to move when driving link 72 rotates.

Actuator 71 is positioned at the vertical portion 22 of head capsule 2, can rotate around the axis X of output shaft 3.It comprises is roughly the spanner portion 712 that the main body 711 of hollow cylindrical and the bottom of autonomous agent 711 extend radially outwardly out.The bottom of main body 711 also offers the rectangular indentation 713 of two Central Symmetries settings, and spanner portion 712 is similarly rectangle and is positioned at same axial height with breach 713.

Driving link 72 is processed by rigid, and it is installed in output shaft 3, and in the space just formed between the overcoat 343 and inner sleeve 345 of axle bed 34.Driving link 72 comprise hollow cylindrical body 721, from body 721 extend two protuberances 722 and two support portions 723.Two protuberances 722 stretch out from the outer radial of body 721, and lay respectively in the breach 713 of actuator 71, and Central Symmetry is arranged; Body 721 has upper horizontal surface 724, and two support portions 723 form from axial upwards extension of the upper surface 724 of body 721, and same Central Symmetry is arranged.Body 721 is Openworks shape, and support portion 723 is close to protuberance 722.The top axle of support portion 723, to inclination, forms first field of conjugate action 725.First field of conjugate action 725 raises along clockwise direction gradually, has the first lift angle.Being provided with first elastic component 726, first elastic component 726 one end between the inner sleeve 345 of driving link 72 and axle bed 34 supports in inner sleeve 345, and the other end is resisted against on driving link 72, thus makes driving link 72 rotate life can to automatically return to initial position.In addition, body 721 radial extension inside it is provided with the first limiting section 727, to coordinate with driven member 73, when retaining mechanism 6 is in off-position, under the effect of the first limiting section 727, and the rotation of restriction driving link 72.

Driven member 73 is processed by rigid equally, and it is arranged on the top of driving link 72 in the axial direction, and it comprises the cooperation section 731, accommodating section 732 and the guide rod 733 that axially set gradually, and three's radial dimension reduces successively.Wherein, accommodating section 732 is positioned at and coordinates above section 731, and guide rod 733 is positioned at above accommodating section 732.Coordinate section 731 to be hollow form, it comprises hollow cylindrical matrix 734, some ribs 7341 from the outwardly extension in the outside of matrix 734.Rib 7341 is housed in the depressed part 331 of axle sleeve 33 just, thus output shaft 3 is not rotatable relatively to make driven member 73.Matrix 734 has horizontal surface 7342, and its lower end is obliquely installed from lower surface 7342, forms two sections of engaging pieces 735 coordinated with the support portion 723 of driving link 72 respectively.Matrix 734 axially protrudes downwards from lower surface 7342 and is extended with the second limiting section 7343, to coordinate with the first limiting section 727 of driving link 72, and the rotation of spacing driving link 72.The top axle of engaging piece 735, to inclination, forms second field of conjugate action 736, second field of conjugate action 736 and raises gradually in the counterclockwise direction, and be divided into quick fraction 7361 and low speed segment 7362.Wherein, quick fraction 7361 has the second lift angle, low speed segment 7362 has the 3rd lift angle, second lift angle is greater than the 3rd lift angle, and the 3rd lift angle is equal with the first lift angle of first field of conjugate action 725, when coordinating with first field of conjugate action 725 of driving link 72 to make quick fraction 7361, driven member 73 can be driven fast and axially move.The collecting section 732 of driven member 73 is provided with host cavity 737, to accommodate retaining mechanism 6.The side of driven member 73 offers opening 738, and opposite side opposed open 738 is provided with perforate 739.

Retaining mechanism 6 is housed in the host cavity 737 of driven member 73, and it comprises locking member 61 and the second elastic component 62.Wherein, locking member 61 is roughly in tabular, and it comprises the spherical head 611 in side, two accommodation holes 612 at opposite side and the locking hole between head 611 and accommodation hole 612 613.Second elastic component 62 is similarly two, and one end is housed in the accommodation hole 612 of locking member 61, and the other end is then resisted against the roof of the host cavity 735 of the accommodating section 732 of driven member 73.Locking member 61 is fit in the host cavity 735 of driven member 73 by the opening 738 of driven member 73, its head 611 is housed in the perforate 739 of driven member 73 just, and one end of locking member 61 its head 611 relative can the axis X axially banking motion of output shaft 3 relatively, be namely pivotal point pivotable in the axial direction with head 611.

In order to make driven member 73 move down in the axial direction, between driven member 73 and output shaft 3, be axially provided with the 3rd elastic component 324.3rd elastic component 324 is set on guide rod 733, and one end is resisted against the upper surface of the accommodating section 732 of driven member 73, and the other end is accommodated and is resisted against in the blind hole 311 of axis body 31.After being rotated from initial position to make actuator 71, can automatically reply, between actuator 71 and the vertical portion 22 of head capsule 2, being provided with the 4th elastic component 714.4th elastic component 714 one end is resisted against on the inwall of head capsule 2, and the other end is resisted against in the main body 711 of actuator 71.

Still referring to figs. 2 to Fig. 4, the assembling process of subelement in the head capsule 2 that emphasis describes Multi Role Aircraft 100.First, the driving link 72 of driving mechanism 7 is arranged in the axle bed 34 of output shaft 3, and between the inner sleeve 345 the first elastic component 726 being arranged on axle bed 34; Then, axle sleeve 33 is arranged on axle bed 34, and axle bed 34 is fixed relatively; Then, just retaining mechanism 6 is arranged in the driven member 73 of driving mechanism 7, and driven member 73 is coordinated with the depressed part 331 of axle sleeve 33 by rib 7341, driven member 73 is mounted in axle sleeve 33, and the one end making locking member 61 install the second elastic component 62 is positioned at directly over the stop section 347 of axle bed 34, make the engaging piece 735 of driven member 73 corresponding with the support member 725 of driving link 72 simultaneously; Then, first shaft-cup 32 is mounted and fixed on axle sleeve 33, then axis body 31 is mounted and fixed on shaft-cup 32; Finally, actuator 71 is set on the axle sleeve 33 of output shaft 3 from top to bottom, and the 4th elastic component 714 is arranged between actuator 71 and head capsule 2.So far, in head capsule 2, the assembling of main element completes.

Below in conjunction with Fig. 5 to Figure 12, the locking process of present embodiment Multi Role Aircraft 100 is described from four location status.Driving mechanism 7 can drive retaining mechanism 6 to change between locked position and off-position, and when locked position, fixture 8 mechanism 6 that is locked clamps, thus is stably fixed on the carrier 341 of output shaft 3 by working head 5; When off-position, retaining mechanism 6 unclamps fixture 8, fixture 8 can be removed in output shaft 3, thus taken off by working head 5.

As shown in Figure 5 and Figure 6, for Multi Role Aircraft 100 is in the schematic diagram of primary importance, now retaining mechanism 6 is in off-position.In this position, under the effect of the 4th elastic component 324, driven member 73 moves down certain distance, until the lower surface 7342 of the cooperation section 731 of driven member 73 abuts to the upper surface 724 of the body 721 of driving link 72.The locking member 61 of retaining mechanism 6 is subject to the block of the stop section 347 of axle bed 34 when moving down, finally make locking member 61 be in the horizontal level of the axis X perpendicular to output shaft 3, the inner surface of the locking hole 613 of locking member 61 departs from the outer surface in the bar portion 82 of fixture 8 and engages.Now, locking member 61 pairs of fixtures 8 are in off-position, fixture 8 can be removed in locking member 61.Before fixture 8 is installed into output shaft 3, first working head 5 is arranged on the carrier 341 of output shaft 3, then after fixture 8 being passed the centre bore 511 of working head 5 and the accepting hole 346 of axle bed 34, enter the locking hole 613 of locking member 61, and make the top of fixture 8 near the bottom of the accommodating section 732 of driven member 73.

It may be noted that above-mentioned off-position drives the rotation of external drive part 71 to drive driving link 72 to turn an angle by external force, overcome the torsion of the 4th elastic component 714 simultaneously.When off-position, although cancelled external force, because the first limiting section 727 of driving link 72 coordinates with the second limiting section 7343 of driven member 73, although driving link 72 is subject to the twisting force of the 4th elastic component 714, still can not turn round, make retaining mechanism 6 remain on off-position.

As shown in Figure 7 and Figure 8, for Multi Role Aircraft 100 is in the schematic diagram of the second place, now retaining mechanism 6 is in the state between locked position and off-position, and fixture 8 mechanism 6 that is not yet locked locks completely.User is by the pressing plate 81 of pressing fixture 8, and the axis of elasticity that the top in bar portion 82 drives driven member 73 to overcome the 3rd elastic component 324 upwards moves certain distance.Driven member 73 drives on retaining mechanism 6 simultaneously and moves, under the elastic force effect of the second elastic component 62, locking member 61 only head 611 axially moves, make the axis shaft of the relative output shaft 3 of locking member 61 to inclination, but one end that in this position, locking member 61 is relative with head 611 is not yet separated from completely with the stop section 347 of axle bed 34, therefore locking member 61 is locked the bar portion 82 of part 8 not yet completely.

In addition, in the second position, although driven member 73 has axially moved certain distance, the second limiting section 7343 of driven member 73 has not yet been thrown off in the axial direction completely with the first limiting section 727 of driving link 72, and the second limiting section 7343 still can play position-limiting action to the first limiting section 727.Therefore, although the lower surface of driven member 73 7342 is separated from the upper surface 724 of driving link 72, driving link 72 is under the anticlockwise torsion of the first elastic component 726, still can not rotate, now first field of conjugate action 725 of driving link 72 forms a determining deviation in the axial direction with second field of conjugate action 736 of driven member 73.

As shown in Figure 9 and Figure 10, for Multi Role Aircraft 100 is in the schematic diagram of the 3rd position, now retaining mechanism 6 is in locked position, and fixture 8 mechanism 6 that is locked locks completely.Fixture 8 pushes away on further, and promotes driven member 73 and axially move further, and the second limiting section 7343 of driven member 73 is axially separated from the first limiting section 727 of driving link 7.After the upper resistance by driven member 73 of driving link 72 radial direction is removed, under the twisting force of the first elastic component 726, start to rotate counterclockwise.First first field of conjugate action 725 of driving link 72 can contact with the quick fraction 7361 of second field of conjugate action 736 of driven member 73, because the second lift angle of quick fraction 7361 is larger, therefore after first field of conjugate action 725 coordinates with the quick fraction 7361 of second field of conjugate action 736, can promote driven member 73 rapid axial to move, to eliminate the axial spacing between the pressing plate 81 of fixture 8 and the installation portion 51 of working head 5.After first field of conjugate action 725 of driving link 72 slips over the quick fraction 7361 of driven member 73, continue to rotate counterclockwise, and coordinate with the low speed segment 7362 of driven member 73, eliminate the axial spacing between the pressing plate 81 of fixture 8 and the installation portion 51 of working head 5 further.In the 3rd position, still there is certain axial spacing between the pressing plate 81 of fixture 8 and the installation portion 51 of working head 5, now the pressing plate 81 of fixture 8 not yet extrudes the installation portion 51 of working head 5, and working head 5 is not axially clamped yet.

As is illustrated by figs. 11 and 12, for Multi Role Aircraft 100 is in the schematic diagram of the 4th position, now retaining mechanism 6 is in locked position, and fixture 8 mechanism 6 that is locked locks completely, and working head 5 fixture 8 axially clamps.Under the torsion of the first elastic component 726, driving link 72 rotates counterclockwise further, with the installation portion 51 making pressing plate 81 squeezed tight of fixture 8 live working head 5, with axial restraint working head 5.After axial spacing between the installation portion 51 and the pressing plate 81 of fixture 8 of working head 5 is eliminated completely, the part 61 that is locked of the bar portion 82 due to fixture 8 clamps, and therefore driving link 72 stops operating.Now, first field of conjugate action 725 of driving link 72 engages with the low speed segment 7362 of second field of conjugate action 736 of driven member 73.In present embodiment, the first lift angle of first field of conjugate action 725 is less, is set to 9 degree, thus can realize self-locking, when the axial load avoiding working head 5 to be subject to is excessive, and occurs getting loose.

It may be noted that, in present embodiment, the first lift angle of first field of conjugate action 725 of driving link 72 is not limited to 9 degree, and the material of driving link 72 is steel or iron, the coefficient of friction of first field of conjugate action 725 is between 0.1 ~ 0.15, and therefore the first lift angle all can realize self-locking between 11 ~ 17 degree.Obviously, when driving link 72 is other material, the scope of the first lift angle also can correspondingly change.

Above, describe the clamping process of present embodiment Multi Role Aircraft 100 in detail, its dispose procedure is then contrary with clamping process.When working head 5 is dismantled from output shaft 3 by needs, only manually need pull the spanner portion 712 of actuator 71, actuator 71 is rotated clockwise.After actuator 71 turns an angle, its breach 713 is interfered with the protuberance 722 of driving link 72, and then drives driving link 72 to rotate clockwise.Driving link 72 is when driven member 73 rotates, low speed segment 7362 and the quick fraction 7361 of first field of conjugate action 725 and second field of conjugate action 736 are separated from successively, make driven member 73 under the elastic force effect of the 3rd elastic component 324, axially move down, until the lower surface 7342 of driven member 73 abuts to the upper surface 724 of driving link 72.

In the process that driven member 73 axially moves down, retaining mechanism 6 can be driven axially to move down.Locking member 61 is in the process moved down, and its one end relative with head 611 can be subject to the block of the stop section 347 of axle bed 34, finally makes locking member 61 be in the horizontal level of the axis X perpendicular to output shaft 3, thus release fixture 8.Meanwhile, when driven member 73 moves down, fixture 8 can be driven to move down, fixture 8 releases certain distance in output shaft 3 the most at last, thus fixture 8 can be taken out easily in output shaft 3.

In sum, the power tool 100 of present embodiment by arranging the driving mechanism 7 with driving link 72 and driven member 73, and makes driving link 72 and driven member 73 to be arranged respectively first field of conjugate action 725 and second field of conjugate action 736 matched.When driving link 72 is around the axis X reciprocating rotation of output shaft 3, driven member 73 can be driven axially to move up and down by the cooperation of two fields of conjugate action, thus retaining mechanism 6 is locked or discharges fixture 8.This structure handled easily, and after the lift angle of first field of conjugate action 725 is located at certain limit, can self-locking be realized, thus the stability of the work of guarantee.In addition, by arranging an elastic component between driving link and output shaft, when mounting fixing parts, driving link can be made to return back to locked position from off-position automatic rotation, saves operating procedure.

Detailed description of the invention two

Below in conjunction with Figure 13 and Figure 14, the second embodiment of the present invention is described.What present embodiment was specifically related to is also a kind of Multi Role Aircraft, and be its driving mechanism 10 with the difference of Multi Role Aircraft 100 in the first embodiment, other parts are all identical with the first embodiment.The driven member 12 that driving mechanism 10 comprises driving link 11, driving link 11 coordinates and the first elastic component 13.This Multi Role Aircraft also comprises output shaft 14, fixture 15, installs working head 16 on the output shaft 14 by fixture 15, and is housed in the retaining mechanism 17 in driven member 12.Output shaft 14 is provided with axle bed 141, and driving link 11 is arranged in axle bed 141, and driven member 12 is axially disposed within the top of driving link 11.Axle bed 141 end is provided with carrier 142, and working head 16 is clamped between carrier 142 and fixture 15.Retaining mechanism 17 comprise locking member 171 and and the second elastic component 172 of being arranged between locking member 171 and driven member 12, retaining mechanism 17, under the effect of driving mechanism 10, can move between locked position and off-position, thus clamping or release fixture 15.In addition, between driven member 12 and output shaft 14, be also provided with the 3rd elastic component (not shown) in the axial direction, when fixture 15 is installed in output shaft 14, driven member 12 can be driven to overcome the elastic force of the 3rd elastic component and axially move.

Identical with the first embodiment, driving mechanism 10 equally can under the effect not needing other aid, retaining mechanism 17 is changed between locked position and off-position, and when locked position, can support locking mechanism 17 rigidly, the distance between the carrier of retaining mechanism 17 output shaft 14 relatively can not be compressed.Thus can prevent when load is larger, retaining mechanism 17 and fixture 15 to moving down by integral shaft, are made working head 16 occur loosening, ensure the stability of whole instrument, improve the operating efficiency of working head 16.

Driving link 11 is provided with first field of conjugate action 111, and driven member 12 is provided with second field of conjugate action 121 coordinated with first field of conjugate action 111.Different from the first embodiment, first field of conjugate action 111 and second field of conjugate action 121 are plane, and perpendicular to the axis X 2 of output shaft 14.Driving link 11 is also provided with first depressed part 112 with first field of conjugate action 111 in the axial direction with certain altitude difference, on driven member 12, then corresponding the second depressed part 122, second depressed part 122 coordinated with the first depressed part 112 that is provided with has certain altitude difference in the axial direction with second field of conjugate action 121 equally.In addition, driving link 11 is also provided with the protuberance 113 for outside force, by protuberance 113, driving link 11 relative axis X2 can be driven to rotate.

As shown in figure 13, retaining mechanism 17 is positioned at locked position.Now, first field of conjugate action 111 of driving link 11 and second field of conjugate action 121 of driven member 12 are just relative and engage, and driven member 12 is supported on a relatively high axial location by driving link 11.Locking member 171, under the effect of the second elastic component 172, is in the position that relative axis X2 tilts, thus clamp fixer 15.In this position, by protuberance 113, drive after driving link 11 rotates clockwise certain angle, first field of conjugate action 111 and second field of conjugate action 121 stagger engagement.Under the effect of the 3rd elastic component, driven member 12 axially moves down, and makes retaining mechanism 17 be converted to off-position by locked position.

As shown in figure 14, retaining mechanism 17 is positioned at off-position.In this position, first field of conjugate action 111 of driving link 11 and the first depressed part 112 engage with second field of conjugate action 121 of driven member 12 and the second depressed part 122 respectively, and driven member 12 is supported on a relatively low axial location by driving link 11.Although be subject to the elastic force of the first elastic component 13, due to spacing by driven member 12 of driving link 11, still cannot turning anticlockwise.Locking member 171 is stopped by the stop section 143 on axle bed 141, and rotates to the horizontal level perpendicular to axis X 2, thus release fixture 15.Now, fixture 15 can be shifted out in output shaft 14, and working head 16 is pulled down the most at last.

When installment work 16, first working head 16 is arranged on the carrier 142 of output shaft 14, then by fixture 15 through after working head 16, insert in output shaft 14, and make fixture 15 finally support driven member 12.Continue axially pressing fixture 16, driven member 12 can be driven to overcome the elastic force of the 3rd elastic component, axially move certain distance, first field of conjugate action 111 of second field of conjugate action 121 of driven member 12 and the second depressed part 122 and driving link 11 and the first depressed part 112 are departed from and engages.Finally, driven member 12 and driving link 11 are thrown off in the axial direction, driving link 11 is under the elastic force effect of the first elastic component 13, counterclockwise automatic rotary is to its initial position, even if locking device 17 returns locked position by off-position, thus clamp fixer 15, working head 16 is stably fixed on the output shaft 14.

From the above, the Multi Role Aircraft in present embodiment, when without the need to other aid, driving mechanism 10 can make retaining mechanism 17 change between locked position and off-position, thus can install or remove working head 16 easily.In addition, when locked position, driving link 11 rigid support driven member 12, retaining mechanism 17 is arranged in driven member 12, thus makes retaining mechanism 17 driven-mechanism 10 rigid support, can prevent working head 16 from occurring when load is excessive loosening and skidding.

Obviously, in present embodiment, retaining mechanism 17 is also not limited to adopt locking member 171 and the second elastic component 172, and those skilled in the art also can be easy to the structure expecting adopting other, as in background technology the scheme that adopts, do not repeat them here.

Detailed description of the invention three

In above-mentioned first and second embodiments, the driving link of driving mechanism is all rotate around the axis of output shaft, thus driven member is moved axially, and driving mechanism is moved between the first position and the second position.But the present invention is not limited to said structure, driving mechanism of the present invention also can adopt other structure, as the straight line of driving link around the axes normal perpendicular to output shaft rotates.Below in conjunction with Figure 15 to Figure 19, third embodiment of the invention is described.

As shown in Figure 15 and Figure 17, present embodiment is a kind of Multi Role Aircraft 900 specifically, comprises head capsule 90, is arranged on output shaft 91 in head capsule 90 and retaining mechanism 92, drives the driving mechanism 93 of retaining mechanism 92 movement between locked position and off-position, working head 94 and working head 94 is fixed on the fixture 95 of output shaft 91 end.Driving mechanism 93 can move between the first position and the second position, thus retaining mechanism 92 is moved between locked position and off-position.Driving mechanism 93 is also provided with the first elastic component 930, when retaining mechanism 92 moves to locked position from off-position, the first elastic component 930 makes driving mechanism 93 automatically return to primary importance from the second place.

As shown in figure 15, fixture 95 there is pressing plate 951 and from the central shaft of pressing plate 951 to the bar portion 952 upwards extended.Now driving mechanism 93 is in the second place, and makes retaining mechanism 92 be positioned at off-position, and the mechanism 92 that is not locked of the bar portion 952 of fixture 95 clamps, and can be removed by fixture 95, thus disassembled by working head 94 in output shaft 91.As shown in figure 16, now driving mechanism 93 is in primary importance, and makes retaining mechanism 93 be positioned at locked position, and now the mechanism 92 that is locked of the bar portion 952 of fixture 95 clamps, thus is stably clamped between output shaft 91 and fixture 95 by working head 94.

Present embodiment and the retaining mechanism in aforementioned two embodiments, fixture, working head are all roughly the same, and difference is mainly driving mechanism and output shaft.As shown in figure 17, in present embodiment, output shaft 91 has axis X 3, specifically comprise the axis body 911, shaft-cup 912, axle sleeve 913 and the axle bed 914 that axially set gradually, wherein, axle sleeve 913 is roughly in hollow cylindrical, and the bilateral symmetry of axle sleeve 913 offers two through hole 915.Axle bed 914 is provided with the axially outstanding stop section 916 extended, and the bottom of axle bed 914 is the carrier 917 for installment work 94.Retaining mechanism 92 specifically comprises locking member 921 and is supported on second elastic component 922 of locking member 921 one end, and the middle part of locking member 921 offers locking hole 923.

Driving mechanism 93 specifically comprises actuator 931, driving link 932 and driven member 933, and driving link 932 and driven member 933 are arranged between the carrier 917 of retaining mechanism 93 and output shaft 93, and above-mentioned first elastic component 930 is connected on driving link 932.Operation actuator 931, can drive driving link 932 around the straight line pivotable of the axis X 3 perpendicular to output shaft 91, and then drives driven member 933 axially to move up and down by driving link 932.

Actuator 931 is generally u-shaped, and it has two relative arms 934, and the free end of arm 934 is provided with U-shaped fluting 9341.Driving link 932 has the axis X 4 perpendicular to axis X 3, and it comprises the cylindrical shaft portion 935 extended along axis X 4 and the cam part 936 being connected to one end, axle portion 935.Axle portion 935 other end relative with cam part 936 is processed with flat quadrate part 9351, is housed in the U-shaped fluting 9341 of actuator 931.Cam part 936 is roughly fan-shaped, and in being approximately perpendicular to the tabular of axis X 4, its have to axis X 4 close together low side 9361 and to axis X 4 distant high-end 9362, it is common between low side 9361 and high-end 9362 that to form first field of conjugate action 9363, first field of conjugate action 9363 be cam surface.

In present embodiment, driving link 932 has two, and is symmetrical arranged relative to axis X 3.During assembling, diaxon portion 935 is arranged in the through hole 915 of axle sleeve 913 both sides, and can rotate around axis X 4, and two cam part 936 are housed in the inside of axle sleeve 913.Two flat quadrate parts 9351 of driving link 932 are housed in the fluting 9341 of actuator 931 respectively, thus when making rotating drive part 931, drive driving link 932 to rotate by flat quadrate part 9351 with coordinating of fluting 9341.Be equipped with first elastic component 930 between each driving link 932 and axle bed 914, driving mechanism 93 is when the second place, and the first elastic component 930 to be stretched certain length by driving link 932, thus driving mechanism 93 can be made to automatically return to primary importance from the second place.

Driven member 933 is housed in axle sleeve 913, and is presented axially in the top of the cam part 936 of driving link 932.Driven member 933, roughly in T-shape, comprises the tabular being positioned at top and coordinates section 937 and be positioned at the accommodating section 938 coordinated below section 937.Coordinate section 937 perpendicular to axis X 3, the cross section perpendicular to axis X 3 is circular, and a segment distance is protruded relative to accommodating section 938 respectively in both sides, thus forms the engaging piece 9371 coordinated with the cam part 936 of driving link 932 respectively.Two engaging pieces 9371 are axially supported at above the cam part 936 of driving link 932 respectively, second field of conjugate action 9372 coordinated with first field of conjugate action 9363 of cam part 936 is formed bottom engaging piece 9371, in present embodiment, second field of conjugate action 9372 is specially the plane perpendicular to axis X 3.Accommodating section 938 is hollow columnar, and inside is provided with host cavity 9381, to accommodate retaining mechanism 92.

In addition, driving mechanism 93 also comprise be located at driven member 933 and output shaft 91 shaft-cup 912 between the 3rd elastic component 939, thus make driven member 933 be subject to external force drive time, can move axially.In present embodiment, when driving mechanism 93 moves to closing position by deployed position, by driving link 932 rotation drive driven member 933 overcome the 3rd elastic component 939 elastic force and on move.Also can driving mechanism 93 in deployed position time, by axial pressing fixture 95, promote driven member 933 by fixture 95 and axially move.

Below in conjunction with Figure 18 and Figure 19, specifically describe the installation and removal process of working head 94 in present embodiment.During use, rotate counterclockwise around axis X 4 by pulling actuator 931, thus whole driving mechanism 93 is moved between an open position and a closed position, thus retaining mechanism 92 is changed between off-position and locked position, thus release or the part 95 that is locked, so that dismounting or installment work 94.When actuator 931 rotates, by slot 9341 with the coordinating of flat quadrate part 9351, driving link 932 is driven to rotate, make first field of conjugate action 9363 of driving link 932 and the position of engagement of second field of conjugate action 9372 of driven member 933, high-end 9362 are slided into successively from the low side 9361 of cam part 936, thus prop up driven member 933 in the axial direction, driven member 933 is axially moved, makes retaining mechanism 92 move to locked position by off-position.The process that retaining mechanism 92 moves to off-position by locked position is then contrary, only when driving mechanism 93 is positioned at closing position, need pull actuator 931 counterclockwise.

Concrete with reference to Figure 18, now driving mechanism 93 is positioned at the second place, and retaining mechanism 92 is positioned at off-position, and the bar portion 952 of fixture 95 is not clamped, and therefore fixture 95 can be shifted out in output shaft 91, so that installment work 94.In this position, actuator 931 is approximately perpendicular to output shaft 91, and the low side 9361 of the cam part 936 of driving link 932 supports the engaging piece 9371 of driven member 933.Under the effect of the 3rd elastic component 939, driven member 933 is axially displaced downwardly to lower position, makes retaining mechanism 92 be in off-position.In this position, locking member 921 is subject to the stop of stop section 916, after compressing the second elastic component 922, moves to the horizontal level perpendicular to axis X 3, thus the bar portion 952 of release fixture 95.Now the bar portion 952 of fixture 95 can be inserted output shaft 91 or remove in output shaft 91, thus working head 94 can be installed or removed.

Concrete with reference to Figure 19, when installment work 94, need the inside of fixture 95 being inserted output shaft 91.Promotion driven member 933, in the process axially inserted, is axially moved certain distance by fixture 95.Now, under the pulling force of the first elastic component 930, the counterclockwise automatic rotary of driving link 932 meeting, and then drive actuator 931 to be roughly rotated counterclockwise 90 degree, make driving mechanism 93 second place as shown in Figure 18 move to primary importance, finally make retaining mechanism 92 be positioned at locked position.Now, retaining mechanism 92 driven-mechanism 93 rigid support, the distance between the carrier 917 of the relative output shaft 91 of retaining mechanism 92 remains unchanged.In addition, the bar portion 952 of fixture 95 is clamped, and working head 94 is stably clamped between the pressing plate 951 of fixture 95 and the axle bed 914 of output shaft 91.In actuator 931 rotary course, driving link 932 is driven to rotate counterclockwise around its axis X 4, make first field of conjugate action 9363 of cam part 936 and the second field of conjugate action 9372 relative sliding of driven member 933, the position of engagement moves to high-end 9362 from the low side 9361 of cam part 936 successively, thus make driven member 933 overcome the elastic force of the second elastic component 922, axially move certain distance.Driven member 933 drives on retaining mechanism 92 simultaneously and moves, and locking member 921 is departed from stop section 916 and engages, and under the effect of the 3rd elastic component 939, return back to the obliquity of relative axis X3, thus the bar portion 952 of clamp fixer 95.When driving mechanism 93 is positioned at closing position, second field of conjugate action 9372 of the high-end 9362 support driven members 933 of the cam part 936 of driving link 932, because first field of conjugate action 9363 is cam surface, therefore under certain condition, self-locking is formed between first cam surface 9363 and second field of conjugate action 9372, thus fixture 95 can be avoided to occur loosening, can stably clamp working head 94.

In present embodiment, moved between deployed position and closing position by driving mechanism 91, retaining mechanism 92 can be changed between off-position and locked position, thus can without the need under the effect of other aid, dismounting or installment work 94.In addition, the driving link 932 in present embodiment and driven member 933 all adopt rigid, and therefore, retaining mechanism 92 can by rigid support at locked position, thus ensure that fixture 95 there will not be loosening, so that stably steady job 94.

By the understanding of above three detailed description of the invention, be appreciated that, power tool of the present invention is mainly by arranging driving link and the driven member of relative motion, driving mechanism is changed between the first cooperation position and the second cooperation position, moves between locked position and off-position to make retaining mechanism.At locked position, fixture is clamped on output shaft, to fixedly mount working head; In off-position, fixture can be removed from output shaft, to be disassembled from output shaft by working head.Driving link and driven member can arrange first field of conjugate action and second field of conjugate action that can cooperatively interact, and driving mechanism, when the first cooperation position, can form self-locking between two fields of conjugate action, thus can stably support works head.Driving link can driven member rotary motion relatively, and now first field of conjugate action can be set to cam surface, also can be plane or inclined-plane, or can realize other curved surface of self-locking.

In addition, driving mechanism is also connected with the first elastic component on its driving link, after driving link can be made to move, automatically resets to initial position, to enable driving mechanism under certain condition, automatically makes retaining mechanism return back to locked position from off-position.

It may be noted that power tool of the present invention is not limited to above-mentioned embodiment, driving mechanism is not limited to adopt metal material, also can adopt non-metallic material.Driving link is also not limited to relative to driven member rotational motion, also can be relative to driven member translation, as long as driven member can be made axially mobile.In addition, driving link or driven member are also not limited to arrange first field of conjugate action and second field of conjugate action respectively, as long as one in driving link or driven member arranges first field of conjugate action, another one arranges the point, the line that coordinate with this field of conjugate action.

In addition, retaining mechanism in power tool of the present invention is not limited to the structure in above-mentioned embodiment, those skilled in the art can be easy to expect, can use equally as in background technology the retaining mechanism that adopts, also can be alternate manner, as long as retaining mechanism needs axially to move to lock or discharge fixture.

Claims

1. a power tool, comprising:

Housing;

Retaining mechanism, for locking or discharging described fixture; And

It is characterized in that: the driven member that described driving mechanism comprises driving link and coordinates with described driving link, mobile described driving link, described driven member can be driven to move axially, and then drive described retaining mechanism to move axially, when locked position, described retaining mechanism is supported by described driven member, and described driven member is supported by described driving link.

2. power tool as claimed in claim 1, it is characterized in that: described driving link and described driven member by be located at least both one of on first field of conjugate action coordinate, when described driving link rotates, described driven member is driven to move axially by described first field of conjugate action.

3. power tool as claimed in claim 2, is characterized in that: described first field of conjugate action is plane.

4. power tool as claimed in claim 3, is characterized in that: described first field of conjugate action is perpendicular to the axis of described output shaft.

5. power tool as claimed in claim 3, is characterized in that: the axis of described first field of conjugate action and described output shaft acutangulates.

6. power tool as claimed in claim 2, is characterized in that: described first field of conjugate action is cam surface.

7. power tool as claimed in claim 2, is characterized in that: described driving link rotates around the axis of described output shaft or the straight line of the axis that is parallel to described output shaft.

8. power tool as claimed in claim 2, is characterized in that: described driving link rotates around the straight line of the axis perpendicular to described output shaft.

9. power tool as claimed in claim 2, is characterized in that: described first field of conjugate action is arranged on described driving link, described driven member is provided with second field of conjugate action engaged with described first field of conjugate action.

10. power tool as claimed in claim 9, it is characterized in that: described second field of conjugate action is obliquely installed relative to the axis of described output shaft, at least comprises adjacent quick fraction and low speed segment, the lift angle of described quick fraction is greater than the lift angle of described low speed segment.

11. power tools as claimed in claim 10, it is characterized in that: described first field of conjugate action is obliquely installed, its lift angle equals the lift angle of the low speed segment of described second field of conjugate action.

12. power tools as claimed in claim 2, is characterized in that: described driving link and described driven member are all in cylindric, and described first field of conjugate action is formed in one of described driving link and described driven member circumferentially.

13. power tools as claimed in claim 1, is characterized in that: described driving mechanism also comprises actuator, rotate described actuator and described driving link can be driven to rotate.

14. power tools as claimed in claim 1, it is characterized in that: described driving link is provided with the first limiting section, described driven member is provided with the second limiting section, when retaining mechanism is positioned at locked position, described first limiting section coordinates with described second limiting section, limits the rotation of described driving link.

15. power tools as claimed in claim 1, is characterized in that: when described locked position, and described retaining mechanism is by described driving mechanism rigid support, and the axial distance between the carrier of the relatively described output shaft of described retaining mechanism remains unchanged.

16. power tools as claimed in claim 1, it is characterized in that: described driving mechanism is provided with the first elastic component, described first elastic component provides the elastic force that can drive the relatively described output shaft rotation of described driving link.