CN201645394U

CN201645394U - Power transmission type dual-purpose automatic stopper for screwing in and out of screw

Info

Publication number: CN201645394U
Application number: CN2009202213666U
Authority: CN
Inventors: 吴昆霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-16
Filing date: 2009-10-16
Publication date: 2010-11-24
Anticipated expiration: 2019-10-16

Abstract

A power transmission type dual-purpose automatic stopper for screwing in and out of a screw comprises a shell, a main shaft, a tool head and a spring, wherein the shell is internally provided with a circumferential groove penetrating deeply into the inner diameter surface and the upper end of the shell is provided with a through hole; the main shaft penetrates out of the through hole from the interior of the shell, the wall surface of the main shaft is provided with a plurality of radial holes, and each radial hole is internally provided with a first steel ball; the tool head is polygonal on external diameter and penetrates into the lower end of the main shaft, and the polygonal plane of the external diameter of the tool head is contacted with the first steel balls respectively; and the spring is arranged in the shell, and two ends of the spring respectively act on the lower end of the main shaft and the bottom surface inside the shell. When an electric power tool is used for locking the screw to a limitation, the power transmission type dual-purpose automatic stopper can automatically lead the output end to stop rotating, and lead the screw head to be level with the surface of a working piece.

Description

Power conveying type screw screws in and withdraws from dual-purpose autostop

Technical field

The utility model relates to a kind of device that is used for connecting the electric tool output, relates in particular to a kind of power conveying type screw and screws in and withdraw from dual-purpose autostop.

Background technology

For increasing work efficiency, the work of a large amount of at present lock screws uses electric tool to finish mostly, yet, because the rotating speed of electric tool is exceedingly fast and torsion is big, thereby, after through being everlasting screw being locked working substance, cause head of screw to imbed the following shrinkage pool that forms in surface of working substance because torsion is excessive, influence surface aesthetic; If screw when construction decoration is locked in wall, then the screw shrinkage pool imbedding under the wall surface to be caused also must be mended soil by the workmen and be filled and led up very consuming time taking a lot of work.Though commercially available electric tool has the function of adjusting torsion at present, yet, when setting torsion, also must just can adjust to best torque value through test for several times, and in the process of test for several times, if not screw is locked deeply inadequately and made head of screw give prominence to the working substance surface, be to lock excessively and make head of screw imbed formation shrinkage pool under the working substance surface, so still have its inconvenience.

The utility model content

Technical problem underlying to be solved in the utility model is, the electric tool that overcomes the prior art existence is when the lock screw, can't accurately control screw and be locked the problem of the working substance degree of depth, and provide a kind of power conveying type screw to screw in and withdraw from dual-purpose autostop, make electric tool when locking screw up to the limit, automatically stopped the rotation by to be allowed output, make head of screw concordant with the working substance surface.

The technical scheme that its technical problem that solves the utility model adopts is:

Feature of the present utility model is to be assembled with a main shaft and a tool heads in a shell, between main shaft lower end and the shell inner bottom surface spring is set then, and the elastic force of spring can order about main shaft and up move under nature; Described main shaft sidewall is provided with several holes, and insert a steel ball at each hole, these steel balls cooperate the set groove of internal diameter of outer cover walls and curved surface and constitute a clutch, described main shaft can connect the output shaft of an electric tool, under the nature that is not subjected to external force, the elastic force of spring orders about this main axle moving and steel ball is sticked between outer casing inner wall and the tool heads, allow tool heads be able to be rotated with the lock screw by main shaft drives, being locked the working substance surface when screw causes the shell lower end to touch that working substance produces reaction force and when overcoming the elastic force of spring, then described steel ball falls within this groove, causes tool heads to be stuck and produces idle running.

Another feature of the present utility model, be that a fixed structure is set between main shaft and shell, make main shaft move axially and when compressing the spring into to a certain degree with respect to shell, with main shaft and shell relative fixed at this state, cause steel ball with tool heads and shell clip, thus can the reverse rotation of operation tool head.

Based on this, a wherein technological means of the present utility model is to be provided with a ring week groove that gos deep into inside diameter surface in the inside of a shell, and in the upper end of shell one through hole is set, the inboard of this through hole is provided with an axial chute, and is provided with the inner edge that is positioned at below this chute at this through hole; One main shaft up passes this through hole by enclosure, and the wall of described main shaft is provided with several holes radially, inserts one first steel ball in each hole; Also be provided with a tool heads and a spring in the shell, the external diameter of this tool heads is a polygon, and this polygon plane then contacts described first steel ball respectively; The both ends of the spring of being located in the shell acts on main shaft lower end and enclosure bottom surface respectively; Therefore, under the nature that is not subjected to external force, the elastic force of spring is ordered about main shaft and is up moved axially, these first steel balls are sticked between this outer casing inner wall and the tool heads, allow tool heads be able to by main shaft drives, when the lower end of shell was subjected to reaction force and overcomes the elastic force of spring, then described first steel ball fell within this groove, causes tool heads to be rotated by main shaft drives.

Another technological means of the present utility model, be one projection to be set at the outerface of spindle, and the inner edge that a chute and ring week are set at the through hole internal diameter of shell, main shaft moved axially and make projection to move into chute and clip when the shell inner edge with respect to shell, also can shell be engaged with tool heads by steel ball, simultaneously this state is pinned and fix, thereby can the reverse rotation of operation tool head.

Produce excessive frictional resistance for fear of rotatablely moving of tool heads, a technological means more of the present utility model, be one recess to be set in described main shaft lower end, the distance of this recess and described main shaft upper end is less than the distance of this hole and main shaft upper end, and in this recess, insert one second steel ball, produce point by second steel ball and tool heads upper end and contact, avoid the tool heads upper end directly to contact with main shaft.

As preferable selection, shell of the present utility model is made up of a upper shell and lower house, and the internal diameter lower edge of this upper shell is provided with a flange, and the top of this flange forms all grooves of described ring, and in the upper end of upper shell described through hole, chute and inner edge is set.

In order to make the stopper of the present utility model can sealed easily screw, the utility model can also be provided with a magnet in the lower end of shell, is able to hold head of screw by magnet, and then convenient screw is locked working substance.

The beneficial effects of the utility model are, make electric tool during up to the limit, be stopped the rotation by be allowed output at the lock screw automatically, make head of screw concordant with the working substance surface.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the schematic perspective view of the utility model surface structure.

Fig. 2 is the perspective exploded view of the utility model primary clustering syntagmatic.

Fig. 3 is the section plan of the utility model detailed structure.

Fig. 4 is the embodiment action diagram that the utility model is not locked screw the workpiece thing as yet fully.

Fig. 5 is that the utility model is just locked working substance with screw, and makes head of screw concordant with working substance, and lower house touches the embodiment action diagram of workpiece thing.

Fig. 6 is a lower house shown in Figure 5 when continuing working substance exerted pressure, and causes inner clutch structure to produce the embodiment action diagram of idle running.

Fig. 7 is after the utility model snaps in the groove of upper shell with the projection on the main shaft, gets so that main shaft and housing lock, and then the planar gesture figure that can oppositely screw be withdrawed from.

The number in the figure explanation:

1 ... upper shell

11 ... through hole

12 ... chute

13 ... flange

14 ... groove

15 ... inner edge

16 ... clasp

2 ... lower house

3 ... main shaft

31 ... recess

32 ... projection

33 ... hole

34a ... first steel ball

34b ... second steel ball

4 ... spring

5 ... magnet

6 ... tool heads

7 ... screw

8 ... electric tool

9 ... working substance

The specific embodiment

Consult shown in Figure 1, the power conveying type screw that the utility model provides screws in and withdraws from dual-purpose autostop, include by a upper shell 1 and a shell that lower house 2 is formed, the outstanding external diameter in the upper end of shell has the main shaft 3 of a projection 32, the lower end of shell is extruded with a tool heads 6, can driven tool 6 rotation during main shaft 3 rotations.

Consulting Fig. 2 and Fig. 3 again, constitute the upper shell 1 of the utility model shell, is the cylinder of a hollow, and its central authorities have a through hole 11, and the internal diameter of this through hole 11 is provided with a chute 12, and is forming a stepped inner edge 15 near through hole 11 ora terminalis places; Upper shell 1 is provided with a flange 13 near the internal diameter of lower end, and the ring week groove 14 of inside diameter surface is goed deep in the top formation one of flange 13.Be used for and the lower house 2 of upper shell 1 combination also is the cylinder of a hollow, after upper shell 1 and lower house 2 combinations, can constitute space in jointly, the outside lower end of this lower house 2 can also be provided with a magnet 5.The utility model also includes a main shaft 3, a spring 4, several first steel balls 34a, one second steel ball 34b and a tool heads 6; The upper end external diameter of described main shaft 3 is a polygon, and lower end central authorities have one and extend the recess 31 of a degree of depth, and is provided with several holes 33 at main shaft 3 near the sidewall of appropriate location, lower end; The distance of this recess 31 and main shaft 3 upper ends is less than the distance of this hole 33 with main shaft 3 upper ends.During combination, the second steel ball 34b is inserted in the recess 31, and after inserting several first steel balls 34a in each hole 33, be that polygonal tool heads 6 is inserted in main shaft 3 lower ends again with external diameter, and utilize clasp 16 that tool heads 6 is positioned in the main shaft 3, make tool heads 6 can with main shaft 3 relative rotations.Spring 4 is after being placed in tool heads 6 belows, to be combined in the lower house 2 together again, make tool heads 6 pass lower house 2 lower ends, again lower house 2 is fixed in upper shell 1 combination at last, make the upper end of main shaft 3 pass the through hole 11 of upper shell 1 simultaneously, and the two ends of spring 4 act on main shaft 3 lower ends and lower house 2 inner bottom surfaces respectively.

After combination is finished, the last end in contact second steel ball 34b of tool heads 6, the polygon plane of tool heads 6 external diameters then contacts the first steel ball 34a respectively; Under the nature that is not subjected to the external force effect, the elastic force of spring 4 orders about main shaft 3 and up moves axially, each first steel ball 34a is sticked between the polygon plane of upper shell 1 inwall and tool heads 6, therefore, when main shaft 3 is connected in electric tool 8 (consulting shown in Figure 4), can be by electric tool 8 drive shaft 3, and then drive tool heads 6 rotations, be matched with tool heads 6 and can be driven by tool heads 6 by 7 on the screw that magnet 5 holds and lock working substance 9.When screw 7 is locked working substance fully, cause head of screw and working substance surface when concordant, (consult shown in Figure 5) when the lower surface of lower house 2 touches working substance and can produce a reaction force, this reaction force impels the direction of the past main shaft 3 of shell to move and spring 4 is compressed (consulting shown in Figure 6), cause the first steel ball 34a to be displaced in the groove 14 of upper shell 1, the first steel ball 34a just can't produce the clip effect of tool heads 6 with upper shell 1, thereby the rotation of main shaft 3 just can't be passed to tool heads 6, tool heads 6 can be stopped the rotation automatically, therefore, lock screw work each time gets so that all can keep the concordant state in head of screw and working substance surface.

Consult shown in Figure 7, in the time will withdrawing from the screw that is locked in working substance, then main shaft 3 can be moved axially with respect to shell, make projection 32 move into the chute 12 of upper shell 1, make projection 32 clips in inner edge 15 main shaft 3 rotations one angle then, just can make the first steel ball 34a break away from groove 14 and be displaced to flange 13 places of upper shell 1, and be positioned at this state, under this state, the first steel ball 34a clip is between the polygon plane and flange 13 of tool heads 6, make main shaft 3, therefore shell body and tool heads 6 are fixed together, and are able to operation tool head 6 and drive the screws thing of oppositely deactivating.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. a power conveying type screw screws in and withdraws from dual-purpose autostop, it is characterized in that, comprising:

One shell, its inside are provided with a ring week groove that gos deep into inside diameter surface, and have a through hole in the upper end of this shell;

One main shaft up passes this through hole by this enclosure, and the wall of described main shaft is provided with several holes radially, inserts one first steel ball in each hole;

One tool heads, its external diameter are polygon, and this tool heads penetrates the inside, lower end of described main shaft, and the polygon plane of this tool heads external diameter then contacts described first steel ball respectively;

One spring is located in the described shell, and the two ends of this spring act on described main shaft lower end and enclosure bottom surface respectively.

2. power conveying type screw according to claim 1 screws in and withdraws from dual-purpose autostop, it is characterized in that: described shell includes a upper shell and a lower house, the internal diameter lower edge of described upper shell is provided with a flange, and the top of this flange forms all grooves of described ring.

3. power conveying type screw according to claim 1 screws in and withdraws from dual-purpose autostop, and it is characterized in that: the lower end of described shell is provided with a magnet.

4. power conveying type screw according to claim 1 screws in and withdraws from dual-purpose autostop, it is characterized in that: described main shaft lower end is provided with a recess, the distance of this recess and described main shaft upper end is less than the distance of this hole and main shaft upper end, insert one second steel ball in the described recess, described second steel ball of the last end in contact of this tool heads.

5. power conveying type screw according to claim 1 screws in and withdraws from dual-purpose autostop, it is characterized in that: described shell upper end is provided with a through hole, the inboard of this through hole is provided with an axial chute, this through hole is provided with the inner edge that is positioned at this chute below, the external diameter of described main shaft is provided with a pair of projection of should chute and sliding in this chute, when making projection slip over described chute and clip when moving axially described main shaft in this inner edge, the aforementioned first steel ball clip is also locking between outer casing inner wall and tool heads, and tool heads is able to by main shaft drives.