CN201613372U

CN201613372U - Chuck and electric tool using same

Info

Publication number: CN201613372U
Application number: CN2009203518905U
Authority: CN
Inventors: 陆子炎
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2009-12-29
Filing date: 2009-12-29
Publication date: 2010-10-27
Anticipated expiration: 2019-12-29

Abstract

A chuck used for containing and clamping a tool head inserted from outside comprises a spindle, a locking part, a sheath, an elastic component and a popping device. The spindle is used for containing the tool head inserted from the outside; an elongated slot radially penetrating through the spindle is arranged on the spindle; the locking part contained inside the elongated slot is capable of axially and radially moving along the spindle; the sheath sleeved outside the spindle is capable of axially moving relatively to the spindle; the elastic component sleeved between the spindle and the sheath is used for providing axial elastic force for the locking part and the sheath; and the popping device installed inside the spindle is used for providing axial elastic force for the tool head. When the tool head is assembled, the locking part axially and radially moves along the spindle so as to lock the tool head; and when the tool head is disassembled, the locking part radially moves along the spindle so as to release the tool head. An electric tool comprises the chuck.

Description

Chuck and the electric tool that uses this chuck

Technical field

The electric tool that the utility model relates to a kind of chuck and uses this chuck, the electric tool of hand-held classes such as especially a kind of hammer that has the chuck of quick clamping releasing tool head and use this chuck, brill, screwdriver, impact wrench.

Background technology

Traditional chuck, has the chuck main shaft, the chuck main shaft is provided with the axial hole of accommodating tool heads, the chuck main shaft radially be provided with accepting groove, be used to install locking member, the chuck spindle jacket is provided with sheath and applies the elastic component of axial elasticity power in sheath, needs a hand operated sheath another hand insertion tool heads then during the erecting tools head, also needs a hand operated sheath another hand taking-up tool heads then when changing tool heads.The installation and removal tool heads all needs bimanualness like this, uses very inconvenient.

U.S. Pat 6457916 discloses a kind of chuck, comprise a chuck central shaft with the vertical slot hole that extends at longitudinally, this vertical slot hole has openend and blind end, one tool heads lock ball accepting hole and the vertical slot hole that radially extends runs through, lock ball can be outside vertical slot hole the primary importance of release and the second place that part is housed in the locking in the vertical slot hole between move, one shuttle spare slidably is arranged in the vertical slot hole, shuttle spare one end contacts with the compression spring, the other end contacts with tool heads, shuttle spare is of different sizes along the two-part cross section of longitudinally, shuttle spare can move between the second place of primary importance that discharges on the longitudinally and locking, one compression spring compressing shuttle spare makes its blind end away from vertical slot hole, one shuttle spare lock ball is arranged in the shuttle spare lock ball accepting hole that radially runs through vertical slot hole, move the second place of the locking that the primary importance of the i.e. release that contacts with first that shuttle spare longitudinally extends of shuttle spare lock ball and the second portion of shuttle spare lock ball and the extension of shuttle spare longitudinally contact between two positions of shuttle spare lock ball in shuttle spare lock ball accepting hole.

Though above-mentioned chuck can be realized one-handed performance quick-change tool head, because its complex structure, cost is higher, is not suitable for producing in batches making.

For this reason, prior art is necessary further improvement in fact.

The utility model content

At the deficiencies in the prior art, the purpose of this utility model is to provide a kind of chuck that can clamp and release tool heads fast of easy operating simple in structure.

Another purpose of the present utility model is to provide a kind of electric tool that can clamp and release the chuck of tool heads fast that uses easy operating simple in structure.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of chuck, be used to accommodate and the outside tool heads of inserting of clamping, comprise main shaft, locking member, sheath, elastic parts and device for ejecting, described main shaft is used to accommodate the outside tool heads of inserting, described main shaft is provided with the elongated slot that radially runs through main shaft, described locking member is contained in the described elongated slot and can be along main shaft axially and radial motion, described sheath is sheathed on the outside and main shaft axially-movable relatively of main shaft, described elastic parts is set in and is used between main shaft and the sheath providing axial elasticity power to locking member and sheath, and described device for ejecting is installed in and is used in the main shaft providing axial elasticity power to tool heads.When the erecting tools head, described locking member along main shaft axially and radial motion to lock tool heads; When the extracting tool head, described locking member along the radial motion of main shaft with the releasing tool head.

Preferably, described locking member is a steel ball.

Preferably, described elastic parts comprises the compression spring that is set between main shaft and the sheath.

Further, described elastic parts also comprises the pad that is arranged between locking member and the compression spring.

Preferably, described device for ejecting comprises the compression spring that is installed in the described blind hole.

Further, described device for ejecting also comprises the ejection piece that is installed in the described blind hole, and described ejection piece can axially-movable in described blind hole.

Further, in the described blind hole snap ring is installed, described ejection piece can connect with described snap ring.

Preferably, described device for ejecting comprises two magnetic parts that are oppositely arranged along the axial homopolarity of described blind hole.

A kind of electric tool includes aforesaid chuck.

The beneficial effects of the utility model are: chuck of the present utility model and the electric tool that uses this chuck, in the erecting tools head, locking member along main shaft axially and radial motion to lock tool heads; In the extracting tool head, tool heads ejects under the effect of device for ejecting automatically behind the operation sheath, be to install or the extracting tool head all only needs one-handed performance like this, and the utility model adopt less part to realize the function of one-handed performance chuck, so simple in structure.

Description of drawings

Be described in further detail below in conjunction with accompanying drawing and preferred embodiment of the present utility model.

Fig. 1 is the cutaway view of chuck of the present utility model.

Fig. 2 is the schematic diagram of chuck erecting tools head of the present utility model.

Fig. 3 is the schematic diagram of chuck locking tool heads of the present utility model.

Fig. 4 is the schematic diagram of chuck releasing tool head of the present utility model.

Wherein, the related elements reference numeral is as follows:

10. chuck 20. main shafts 30. sheaths

40. locking member 50. elastic parts 60. device for ejecting

90. tool heads 21. blind holes 22. elongated slots

23. the shaft shoulder 24. firsts 25. second portions

26. interior step 29. input parts 31. first emission surfaces

32. seal face 33. second emission surfaces 35. ring washers

51. pad 52. compression springs 61. ejection pieces

62. compression spring 65. snap rings 91. grooves

92. shank 211. openends 212. blind ends

611. anterior 612. afterbodys, 613. accepting grooves

The specific embodiment

With reference to Fig. 1, the utility model discloses the chuck 10 of a kind of quick clamping and releasing tool head 90, chuck 10 can be installed on the electric tool of hand-held classes such as hammer, brill, screwdriver, impact wrench.In preferred embodiment of the present utility model, chuck 10 comprises main shaft 20, is installed in the sheath 30 on the main shaft 20, and the locking member 40 of locking tool heads 90 is installed in the elastic parts 50 in the sheath 30, and the device for ejecting 60 that is installed in main shaft interior 20.Wherein the input part 29 of main shaft 20 connect driving shafts (figure does not show) thus driving main shaft is rotated or ballistic motion.

Main shaft 20 has the blind hole 21 of extending along longitudinally, be used to accommodate the outside tool heads of inserting 90, blind hole 21 has openend 211 and blind end 212, blind hole 21 has internal diameter bigger first 24 and the less second portion 25 of internal diameter vertically, step 26 in forming between first 24 and the second portion 25, main shaft 20 is provided with the elongated slot 22 that radially runs through main shaft 20 in the first 24 of blind hole 21.The first 24 of blind hole 21 is provided with snap ring 65, snap ring 65 is an interference fit with first 24, snap ring 65 is not easy to take out from the first 24 of blind hole 21 like this, and on the step 26, promptly interior step 26 had played the position-limiting action that snap ring 65 is installed in main shaft 20 in snap ring 65 just was stuck in.

Locking member 40 is spherical or cylindrical member, locking member 40 is installed in the elongated slot 22 and can partly be deep in the blind hole 21, elongated slot 22 along the axial length of main shaft 20 greater than spherical diameter or cylindrical member along the axial length of main shaft 20, like this locking member 40 can be in elongated slot 22 along the axially-movable of main shaft 20.Locking member 40 in the utility model is preferably steel ball, because the volume of steel ball is little, makes that the structure of whole chuck is compact more.Tool heads 90 has shank 91, is provided with radial groove 92 near the place of shank 91 on the tool heads 90, and locking member 40 passes elongated slot 22 and is stuck in the groove 92 and can locks tool heads 90.

The main shaft 20 outer sheaths 30 that are arranged with, sheath 30 can be in main shaft 20 upper edge axially-movables, the inner peripheral surface of sheath 30 axially is respectively first emission surface 31, seal face 32 and second emission surface 33 along sheath 30, the internal diameter of seal face 32 is less than the internal diameter of first emission surface 31 and second emission surface 33, thereby seal face 32 is used to compress the groove 92 interior locking tool heads 90 that locking member 40 makes its part extend in the blind hole 21 or is stuck in tool heads 90.Thereby first emission surface 31 and second emission surface 33 are used to discharge locking member 40 can be positioned at outside the blind hole 21 it along the radial motion of main shaft 20.Between first emission surface 31 of sheath 30 and the main shaft 20 spacing collar 35 is installed, spacing collar 35 just is stuck on the step between first emission surface 31 and the seal face 32, is used to limit the openend 211 directions motion of sheath 30 towards blind hole 21.

Between sheath 30 and the main shaft 20 elastic parts 50 is installed, elastic parts 50 comprises the compression spring 52 that is set on the main shaft 20 and is installed in the pad 51 that compresses between spring 52 and the locking member 40, pad 51 may be stuck on the step between the seal face 32 and second emission surface 33, main shaft 20 is provided with the shaft shoulder 23, and compression spring 52 is stuck on the shaft shoulder 23 near an end of blind hole 21 blind ends 212.Certainly, elastic parts 50 also can include only compression spring 52, and just stressed more even for compression spring 52 when the erecting tools head 90 of pad 51 is set, and mounting structure is reliable.

Device for ejecting 60 comprises the ejection piece 61 and the compression spring 62 of the second portion 25 that is installed in blind hole 21, ejection piece 61 can be along the axially-movable of blind hole 21, ejection piece 61 is anterior 611 near an end of openend 211, the relative other end is made as afterbody 612, afterbody 612 is with respect to the radial protrusion of front portion along blind hole 21, so afterbody 612 may be stuck on the snap ring 65, it is the axially-movable that snap ring 65 has limited ejection piece 61, afterbody 612 is axially arranged with accepting groove 613 along blind hole 21, is used for the resettlement section and divides compression spring 62.

Device for ejecting 60 also can have only compression spring 62 to form, in blind hole 21, do not drop when having erecting tools head 91 for fear of compression spring 62, can be arranged to the compression spring 62 of taper, perhaps as long as the part of compression spring 62 close blind ends 212 may be stuck on the snap ring 65.Certainly, also snap ring 65 can be set, as long as can also can realize the blind end 212 that compression spring 62 is fixed on blind hole 21 function of device for ejecting 60.

Device for ejecting 60 is not limited to above version, be that device for ejecting 60 also can be two magnetic parts that are oppositely arranged along blind hole 21 axial homopolarities, magnet for example, magnet also can be along the axially-movable of blind hole 21 under the effect of homopolar-repulsion, the magnet of close openend 211 has along the afterbody of the radial protrusion of blind hole 21 and may be stuck on the snap ring 65, perhaps be limited, in case magnet drops from blind hole 21 when erecting tools head 90 not near the axially-movable of magnet in blind hole 21 of openend 211.

When needs installation or extracting tool head 90, can realize by one-handed performance.To describe the process of installation and removal tool heads 90 below in detail.

Continuation is with reference to Fig. 1, tool heads 90 is inserted in the blind hole 21, the shank 91 of tool heads 90 touches locking member 40 makes its axially-movable break away from seal face 32, with reference to Fig. 2, thereby locking member 40 axially-movables compressing pad 51 acts on compression spring 52 and makes its strain, locking member 40 radial motions are close to second emission surface 33 simultaneously, with reference to Fig. 3, in the shank 91 that locking member 40 is crossed tool heads 90 extend into groove 92 on the tool heads 90, thereby pad 51 extruding locking member 40 under the effect of compression spring 52 makes it contact locking tool heads 90 with seal face 32, at this moment, the shank 91 of tool heads 90 compresses ejection piece 61 makes ejection piece 61 to blind end 212 motion of blind hole 21, and ejection piece 61 acts on compression spring 62 and makes it to be subjected to force compresses.Thereby locking member 40 is stuck in the groove 92 interior locking tool heads 90 on the tool heads 90 like this, finished the Fast Installation of tool heads 90 in chuck 10, promptly as long as tool heads 90 is inserted blind hole 21, need not to operate sheath 30, but chuck 10 auto lock tool heads 90, whole erection process one-handed performance can be finished.

Continuation is with reference to Fig. 3, in the time of extracting tool head 90, along illustrating direction of arrow active force on sheath 30, sheath 30 acts on feasible compression spring 52 strains on the pad 51, with reference to Fig. 4, locking member 40 breaks away from the position of seal face 31 radial motion to the first emission surfaces 31, tool heads 90 is making locking member 40 and the groove 92 on the tool heads 90 throw off under the active force of ejection piece 61, ejection piece 61 at the active force lower edge main shaft 20 of compression spring 62 axially to openend 211 directions motions and withstand on tool heads 90 shanks 91, be locked part 40 of tool heads 90 discharges, tool heads 90 can be taken out easily, ejection piece 61 is stuck in the blind hole 21 by snap ring 65, the state when getting back among Fig. 1 erecting tools head 90 not this moment again.So just finished the fast quick-detach of tool heads 90 from chuck 10, promptly as long as operate sheath 30, tool heads 90 just can eject automatically, and whole unloading process one-handed performance can be finished.

Chuck provided by the utility model and the electric tool that uses this chuck, only need one-handed performance just can finish the Fast Installation and the dismounting of tool heads, operation is very easy, and the utility model has only used less part to realize the chuck of one-handed performance, thereby make that the structure of chuck is simpler, help on industry, applying.

Claims

1. a chuck (10) is used to accommodate and the outside tool heads of inserting (90) of clamping, and it is characterized in that: described chuck (10) comprising:

Main shaft (20) has the blind hole (21) of extending along longitudinally of tool heads of accommodating (90), and described main shaft (20) is provided with the elongated slot (22) that radially runs through main shaft;

Locking member (40) is contained in the described elongated slot (22) and can be along main shaft (20) axially and radial motion;

Sheath (30) is sheathed on outside and main shaft (20) axially-movable relatively of main shaft (20);

Elastic parts (50) is set in and is used between main shaft (20) and the sheath (30) providing axial elasticity power to locking member (40) and sheath (30);

Device for ejecting (60) is installed in and is used in the described blind hole (20) providing axial elasticity power to tool heads (90);

When erecting tools head (90), described locking member (40) along main shaft (20) axially and radial motion to lock tool heads (90); When extracting tool head (90), described locking member (40) along the radial motion of main shaft (20) with releasing tool head (90).

2. chuck as claimed in claim 1 (10) is characterized in that: described locking member (40) is a steel ball.

3. chuck as claimed in claim 1 (10) is characterized in that: described elastic parts (50) comprises the compression spring (52) that is set between main shaft (20) and the sheath (30).

4. chuck as claimed in claim 3 (10) is characterized in that: described elastic parts (50) also comprises the pad (51) that is arranged between locking member (40) and the compression spring (52).

5. chuck as claimed in claim 1 (10) is characterized in that: described device for ejecting (60) comprises the compression spring (62) that is installed in the described blind hole (21).

6. chuck as claimed in claim 5 (10) is characterized in that: described device for ejecting (60) also comprises the ejection piece (61) that is installed in the described blind hole (21), and described ejection piece (61) can axially-movable in described blind hole (21).

7. chuck as claimed in claim 6 (10) is characterized in that: snap ring (65) is installed in the described blind hole (21), and described ejection piece (61) can connect with described snap ring (65).

8. chuck as claimed in claim 7 (10), it is characterized in that: described blind hole (21) has bigger first of internal diameter (211) and the less second portion (212) of internal diameter vertically, step (26) in forming between described first (211) and the second portion (212), described snap ring (65) is stuck on the interior step (26).

9. chuck as claimed in claim 1 (10) is characterized in that: described device for ejecting (60) comprises two magnetic parts that are oppositely arranged along the axial homopolarity of described blind hole (21).

10. electric tool, it is characterized in that: described electric tool includes as any described chuck of claim 1 to 9 (10).