CN205904929U

CN205904929U - Auto -lock screwdriver

Info

Publication number: CN205904929U
Application number: CN201620838563.2U
Authority: CN
Inventors: 黄国庆
Original assignee: KUNSHAN YICHENG TOOL CO Ltd
Current assignee: KUNSHAN YICHENG TOOL CO Ltd
Priority date: 2016-08-04
Filing date: 2016-08-04
Publication date: 2017-01-25
Anticipated expiration: 2026-08-04

Abstract

The utility model discloses an auto -lock screwdriver, including the protheca, the pull ring, first elastic component and positioner, the pull ring inboard is formed with the axial perforation that the proper confession screwdriver body of rod was worn to establish, pull ring one end has linked firmly connecting portion, the connecting portion tip links firmly an annular separation blade, annular separation blade centre bore is perforated coaxially with the axial of pull ring, be formed with the opening rather than the centre bore intercommunication on the annular separation blade, the opening just can supply the double -screw bolt portion of screw to pass through, form the space that can supply screw head to hold between connecting portion and the annular separation blade of pull ring one end on and, the pull ring circumference outside can be located along the cover of endwise slip to the protheca, on positioner can be fixed in the screwdriver body of rod with the protheca, the space that pull ring one end supplied the screw to hold can be stretched out protheca one end and set for the distance, first elastic component provides the elasticity confining force towards the inside direction motion of protheca can for pull ring one end, the utility model discloses can dismantle and the equipment with the screwdriver body of rod is quick, the commonality is strong, convenient to use, and manufacturing cost and use cost are low.

Description

Self-locking screw knife

Technical field

This utility model relates to the technical field of hardware ＆ tools, particularly relates to a kind of self-locking screw knife.

Background technology

Common screwdriver, in the turn of the screw, generally requires with hand steered screw it is ensured that screw is in DRIVE SCREWS in the hole Keep coaxial state, it is to avoid locked askew, cause subsequently to be difficult to take off screw, and screw head is crooked and locks screw product table Face does not line up, or even causes sliding tooth, the problems such as thread damages, however, easily making staff injured with hand steered screw to facilitate, separately One conveniently also brings difficulty to operation, and staff is affected by spatial dimension it is difficult to stable buttresses screw, especially self tapping spiral shell Silk, even more difficult.

Utility model content

In order to overcome drawbacks described above, this utility model provides a kind of self-locking screw knife, and this self-locking screw knife structure is simple, energy Enough be automatically obtained screw righting positioning, it is to avoid hand steered it is ensured that screw to be screwed into position accurate.

This utility model in order to solve a kind of technical scheme that its technical problem is adopted: self-locking screw knife, including protheca, Draw ring, the first elastic component and positioner, are formed with the axial through bore just wearing, draw ring for the screwdriver body of rod inside described draw ring One end is fixedly connected with a connecting portion, the connected annular catch in connecting portion end, the axial direction of this annular catch centre bore and draw ring Perforation is coaxially just right, and this annular catch is formed with an opening being connected with its centre bore, and this opening be able to supply the spiral shell of screw Post portion passes through, and forms the space that can accommodate for screw head between draw ring one end and connecting portion thereon and annular catch, front What set can slide axially is sheathed on draw ring periphery, and protheca can be fixedly installed in the screwdriver body of rod by positioner On, protheca one end setpoint distance can be stretched out for the space that screw accommodates in draw ring one end, and described first elastic component can give draw ring One end provides the elastic holding force towards the motion of protheca internal direction.

As further improvement of the utility model, described positioner is rear enclosure, is formed with and supplies screwdriver inside rear enclosure The jack that knife bar wears, rear enclosure lateral wall is formed with taper surface, rear enclosure lateral wall is formed with least one and is connected with jack Open seam, the protheca other end can fixed cover outside rear enclosure, protheca medial wall is tight against rear enclosure outer side wall surface.

As further improvement of the utility model, formed and rear enclosure lateral wall angle of inclination inside the described protheca other end The bellmouth of coupling.

As further improvement of the utility model, described rear enclosure lateral wall and protheca other end medial wall are respectively equipped with The helicitic texture of coupling.

As further improvement of the utility model, it is additionally provided with the second elastic component, the two ends of the second elastic component length direction Respectively tight against rear enclosure one end and the draw ring other end.

As further improvement of the utility model, the described rear enclosure other end is formed with the limiting section that a diameter extends out, front Set other end backstop is in this limiting section side.

As further improvement of the utility model, the described draw ring other end forms the first stopper section that diameter extends out, front Set forms the second stopper section of inside contracting of diameter inside one end, and the first elastic component is spring, the two ends of its length direction respectively tight against First and second stopper section.

As further improvement of the utility model, described draw ring, connecting portion and annular catch are formed in one structure.

The beneficial effects of the utility model are: this utility model is slided in protheca by draw ring, so that driver bit is existed Draw ring one end supplies the space axial slip that screw head accommodates, and realizes smoothly putting into and in the presence of a tensile force of screw head Automatic-clamping, during the turn of the screw, need not be hand steered screw, screw automatically keeps and the screwdriver body of rod under the effect of elastic clamping power Coaxial location status, screw locks position precisely, ensure that coaxial with screw hole, it is to avoid the hand steered person wound causing Evil, and this utility model can the quick disassembly and assembly with the screwdriver body of rod, can be used on arbitrary normal screws knife, general Property strong, easy to use, manufacturing cost and use cost low.

Brief description

Fig. 1 is view before work of the present utility model；

Fig. 2 is view in work of the present utility model；

Fig. 3 is the axonometric chart of state before work of the present utility model；

Fig. 4 is the axonometric chart of state in work of the present utility model；

Fig. 5 is draw ring structural perspective of the present utility model；

Fig. 6 is Rear-cover structure axonometric chart of the present utility model；

Fig. 7 is protheca axonometric chart of the present utility model；

Fig. 8 is protheca structural principle sectional view of the present utility model.

Specific embodiment

Embodiment: a kind of self-locking screw knife, including protheca 1, draw ring 2, the first elastic component 3 and positioner, described draw ring 2 Inner side is formed with the axial through bore 4 just wearing for the screwdriver body of rod 8, and draw ring 2 one end is fixedly connected with a connecting portion 5, connecting portion 5 The connected annular catch 6 in end, this annular catch 6 centre bore is coaxial just right with the axial through bore 4 of draw ring 2, on this annular catch 6 It is formed with an opening connecting with its centre bore, this opening be able to supply the stud portion of screw 15 pass through, draw ring 2 one end and thereon Connecting portion 5 and annular catch 6 between form the space 7 that can accommodate, the set that protheca 1 can slide axially for screw head Located at draw ring 2 periphery, protheca 1 can be fixedly installed on the screwdriver body of rod 8 for positioner, and draw ring 2 one end supplies screw Protheca 1 one end setpoint distance can be stretched out in the space of 15 receivings, and described first elastic component 3 can provide direction to draw ring 2 one end The elastic holding force of protheca 1 internal direction motion.

During use, first the screwdriver body of rod 8 is arranged in draw ring 2, then protheca 1 and screwdriver rod is made by positioner Body 8 is fixedly connected, and requires the cutter head of screwdriver can stretch in the range of the space length that draw ring 2 one end accommodates for screw head Contract, that is, the cutter head of screwdriver can be compressed to draw ring 2 one end and supply the space of screw 15 head receiving towards protheca 1 internal direction Side is even stretched out away from protheca 1 interior side surface it is also possible to reach draw ring 2 one end for the space that screw 15 head accommodates Outside annular catch 6, acted on by the first elastic component 3 elastic force, driver bit initial position is to supply screw terminal positioned at draw ring 2 one end Annular catch 6 outside state away from protheca 1 side or is stretched out in the space that portion accommodates, and when installing screw 15, first pulls draw ring 2 to make spiral shell Silk knife cutter head indentation draw ring 2 one end supplies certain depth in the space that screw head accommodates, and then screw terminal is put into draw ring 2 one end In the space accommodating for screw 15 head, the stud portion of screw 15 slips into the center of annular catch 6 at the opening of annular catch 6 Kong Li, and make screwdriver cutter head just right with screw 15 head flower pattern, unclamp draw ring 2, the first elastic component 3 elastic force effect Under, draw ring 2 slides to protheca 1 internal direction, and just draw ring 2 relatively moves driver bit to annular catch 6 direction, screwdriver knife , by the clamping of screw 15 head elasticity it is achieved that the righting positioning of screw head, now screwdriver can be to spiral shell for head and annular catch 6 Silk 15 is operated, screw 15 will not occur crooked during locking, locks position accurate, it is to avoid the hand steered screw of people, makes With facilitating, and various sizes of screwdriver, highly versatile can arbitrarily be changed according to different screws.

Described positioner is rear enclosure 9, is formed with the jack wearing for screwdriver knife bar, rear enclosure 9 lateral wall inside rear enclosure 9 On be formed with taper surface, rear enclosure 9 lateral wall is formed with least one open seam 10 being connected with jack, protheca 1 other end energy Enough fixed covers outside rear enclosure 9, protheca 1 medial wall tight against rear enclosure 9 outer side wall surface, by protheca 1 and rear enclosure 9 fixed cover Connect, protheca 1 medial wall, tight against rear enclosure 9 outer side wall surface, makes the open seam 10 on rear enclosure 9 side wall shrink, reduces rear enclosure 9 jack straight Footpath, and then so that rear enclosure 9 is fixedly connected with the screwdriver body of rod 8 holding, this structure is simple, can be applied to the screwdriver of various sizes The body of rod 8, can also arrange radial screw bore on protheca 1 side wall in addition, lock this radial screw bore, locking by locking screw Screw end is held out against with the screwdriver body of rod 8 lateral wall realizes being fixedly connected of protheca 1 and the screwdriver body of rod 8.

Form the bellmouth mating with rear enclosure 9 lateral wall angle of inclination inside described protheca 1 other end.

The helicitic texture of coupling is respectively equipped with described rear enclosure 9 lateral wall and protheca 1 other end medial wall.

It is additionally provided with the second elastic component 11, the two ends of the second elastic component 11 length direction are respectively tight against rear enclosure 9 one end and draw ring 2 The other end.

Described rear enclosure 9 other end is formed with the limiting section 12 that a diameter extends out, and protheca 1 other end backstop is in this limiting section 12 Side.

Described draw ring 2 other end forms the first stopper section 13 that diameter extends out, and forms what diameter inside contracted inside protheca 1 one end Second stopper section 14, the first elastic component 3 is spring, and the two ends of its length direction are respectively tight against first and second stopper section.

Described draw ring 2, connecting portion 5 and annular catch 6 are formed in one structure.

Claims

1. a kind of self-locking screw knife it is characterised in that: include protheca (1), draw ring (2), the first elastic component (3) and positioner, It is formed with the axial through bore (4) just wearing for the screwdriver body of rod, draw ring one end is fixedly connected with a connecting portion inside described draw ring (5), the connected annular catch (6) in connecting portion end, this annular catch centre bore is coaxial with the axial through bore of draw ring just right, this ring One opening being connected with its centre bore is formed with shape catch, this opening be able to supply the stud portion of screw (15) to pass through, draw ring Form, between one end and connecting portion thereon and annular catch, the space (7) that can accommodate for screw head, protheca can be along axle It is sheathed on draw ring periphery to slide, protheca can be fixedly installed on the screwdriver body of rod (8) for positioner, draw ring one Protheca one end setpoint distance can be stretched out in the space that end accommodates for screw, and described first elastic component can provide court to draw ring one end The elastic holding force moving to protheca internal direction.

2. self-locking screw knife according to claim 1 it is characterised in that: described positioner be rear enclosure (9), inside rear enclosure It is formed with the jack wearing for screwdriver knife bar, rear enclosure lateral wall is formed with taper surface, rear enclosure is formed with least on lateral wall Article one, the open seam (10) connecting with jack, the protheca other end can fixed cover outside rear enclosure, protheca medial wall is tight against rear Set outer side wall surface.

3. self-locking screw knife according to claim 2 it is characterised in that: inside the described protheca other end formed with rear enclosure outside The bellmouth of sidewall slope angle coupling.

4. self-locking screw knife according to claim 2 it is characterised in that: inside described rear enclosure lateral wall and the protheca other end The helicitic texture of coupling is respectively equipped with wall.

5. self-locking screw knife according to claim 2 it is characterised in that: be additionally provided with the second elastic component (11), the second elasticity The two ends of part length direction are respectively tight against rear enclosure one end and the draw ring other end.

6. self-locking screw knife according to claim 2 it is characterised in that: the described rear enclosure other end is formed with a diameter and extends out Limiting section (12), protheca other end backstop is in this limiting section side.

7. self-locking screw knife according to claim 1 it is characterised in that: the described draw ring other end form that diameter extends out the One stopper section (13), forms the second stopper section (14) that diameter inside contracts inside protheca one end, the first elastic component is spring, its length The two ends in direction are respectively tight against first and second stopper section.

8. self-locking screw knife according to claim 1 it is characterised in that: described draw ring, connecting portion and annular catch are one Forming structure.