CN2820451Y

CN2820451Y - Motor screw driver clamping head

Info

Publication number: CN2820451Y
Application number: CN 200520042147
Authority: CN
Inventors: 萧辅仁
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-03
Filing date: 2005-06-03
Publication date: 2006-09-27
Anticipated expiration: 2015-06-03

Abstract

The utility model discloses a clamping head for a maneuver screw driver, which comprises a transmission shaft arranged on a shaft center of the clamping head, and a clamping member fixed on the transmission shaft, wherein one end of the transmission shaft is connected with a maneuver screw driver handle, and can be driven to rotate by the maneuver screw driver handle; the other end of the transmission shaft is inserted into a sleeve joint part of a screw head; the end part of the clamping member is inward provided with a cap-shaped cavity which can coated and connected with the screw head; the cavity is surrounded around the sleeve joint part, and the inner wall of the top part is provided with magnetic performance. The utility model is characterized in that the circumferential wall of the cavity near a port are annularly distributed with a plurality of embedding bodies; each embedding body is protruded out of the inner face of the circumferential wall, the outer face of which is provided with a spacing slot; an elastic ring hooped around each embedding body is arranged in each spacing slot. When a screw is coated and connected, the embedding bodies can clamp the lower edge of the screw head so as to change the single way of attracting and fixing the screw only by magnetism in the prior art. The utility model can be widely used for coating and clamping various screws whether the screws are provided with magnetic attraction or not.

Description

Motor-driven screwdriver chuck

Technical field:

The utility model relates to a kind of power-driven tool that is used for trip bolt, especially relates to a kind of motor-driven screwdriver chuck.

Background technology:

General all have a chuck 1 in order to screw or to unscrew the power-driven tool of screw as pneumatic or electric screw driver, and as shown in Figure 1 and Figure 2, this chuck 1 is in order to contain the head of screw 3 that overlaps screw 2.The axle center of chuck 1 is provided with a hexagonal driving shaft 4, one end of this driving shaft 4 is connected on the motor-driven screwdriver handle, be subjected to the power drive of handle of a knife transmission and rotate, the other end of driving shaft 4 is provided with criss-cross socket part 5 (being driver bit), can be plugged in the screw slots 6 on the head of screw 3, to screw or to unscrew this screw 2.Because in the process of turn, the socket part 5 of driving shaft 4 is easy to screw slots 6, therefore is connected with a holder 7 and is surrounded on around the socket part 5 screwing on the driving shaft 4.These holder 7 ends have the hat cavity of a hollow, the top inner wall 8 of this cavity has magnetic, shape and head of screw 3 match, and can contain cover and hold head of screw 3, deviate from screw slots 6 so can prevent socket part 5 (being driver bit) in the process of turn screw 2.

Yet the material of at present many screws can not be attracted by magnetic force, as stainless steel, copper, engineering plastics etc., so above-mentioned 1 pair of such screw of motor-driven screwdriver chuck is just inoperative.

Summary of the invention:

The purpose of this utility model is to overcome the limitation that prior art can not adapt to the screw that is not subjected to magnetic, but a kind of extensive motor-driven screwdriver chuck of the scope of application that can contain all kinds of magnetic of folder and screw that can not magnetic is provided.

The technical scheme in the invention for solving the technical problem is, a kind of motor-driven screwdriver chuck, comprise the power transmission shaft of being located at the chuck axle center and the holder that is fixed on this power transmission shaft, this power transmission shaft one end is connected with motor-driven screwdriver handle and the driving that can be subjected to and rotating, its other end is the socket part of the head of screw of can pegging graft, this holder end inwardly is provided with one can contain the hat cavity that connects head of screw, this cavity be surrounded on above-mentioned socket part around, its top inner wall has magnetic, annular spread has some inlays on the perisporium of described cavity proximal port, each inlay protrudes from the inner face of this perisporium, the outside of perisporium is provided with a stopper slot, accommodates an elasticity corral hoop in the groove on each inlay.

The inlay of motor-driven screwdriver chuck described in the utility model is spherical, and power transmission shaft is a polygonal, and the socket part is a cross.

Compare with existing motor-driven screwdriver chuck, the beneficial effects of the utility model are: annular is provided with and somely is subjected to elastic force compacting and protrudes from the inlay of perisporium inner face on the perisporium of holder cavity proximal port, so that containing the lower edge of blocking head of screw when connecing head of screw, thereby only rely on magnetic force to inhale the single mode of solid screw in the change prior art, no matter can be suitable for containing all kinds of screws that folder could magnetic widely.

Description of drawings:

Fig. 1 is the schematic perspective view of existing motor-driven screwdriver chuck.

Fig. 2 is the cutaway view of existing motor-driven screwdriver chuck.

Fig. 3 is a schematic perspective view of the present utility model.

Fig. 4 is a cutaway view of the present utility model.

Fig. 5 is the schematic diagram of the utility model clamp screws state.

The specific embodiment:

Now with specific embodiment the utility model is described in further detail in conjunction with the accompanying drawings.

At first see also Fig. 3 and 4 structural representations of the present utility model, illustrate motor-driven screwdriver chuck 10 and include power transmission shaft 11 and holder 30.This power transmission shaft 11 is for polygonal (present embodiment is a hexagon) and be located on the axle center of motor-driven screwdriver chuck 10, and the one end is connected with motor-driven screwdriver handle (not shown), and can be subjected to the power drive that motor-driven screwdriver handle transmits and rotate; The other end of power transmission shaft 11 is criss-cross socket part 12 (being the cross screw cutter head), and this socket part 12 can be inserted in the screw slots 22 on the head of screw 21, screws or unscrews thereby just can drive screw 20 when power transmission shaft 11 rotations.Described holder 30 screws on the periphery that is fastened on power transmission shaft 11, its end inwardly is provided with a hat cavity 31, this cavity 31 be surrounded on above-mentioned socket part 12 around, its cavity shape and head of screw 21 match, thereby head of screw 21 can be contained be inserted in, the top inner wall of this hat cavity 31 has magnetic force, can hold the screw of irony.On the perisporium 32 of described cavity 31 near port, be distributed with several spherical inlays 33 circlewise, the part spheroid of each inlay 33 protrudes from the inner surface of perisporium 32, and on the perisporium 32 be provided with a stopper slot 34 on the inlay 33 places rings side face respective outer surfaces, accommodate an elastic ring 35 in this stopper slot 34, these elastic ring 35 lock rings are in the outside of each inlay 33, thereby each inlay 33 is executed an inside pressure all the time, make each inlay 33 keep protruding on the inner surface of perisporium 32.But because elastic ring 35 has certain elastic force, thus when being subjected to enough thrust inlay 33 can retraction perisporiums 32 in, and the thrust position that each inlay 33 of back can recover to protrude that disappears.

View when consulting Fig. 5 the utility model clamp screws again.Described motor-driven screwdriver chuck 10 is by advancing holder 30 during socket screw 20, inlay 33 on the perisporium 32 is outwards pushed by the outer of head of screw 21, after head of screw 21 is contained hat cavity 31, because the elastic force of elastic ring 35, inlay 33 is pushed back original position again, and the lower edge of blocking head of screw 21, thereby screw 20 is clamped.At this moment screw slots 22 are inserted in socket part 12, and power transmission shaft 11 just can drive screw 20 rotations.If but the screw material is the material of iron and steel class magnetic, then its head of screw 21 is not only fixed by inlay 33, but also is subjected to having the attraction of inwall at cavity 31 tops of magnetic, thereby reaches the dual solid effect of cover.

Hence one can see that, and motor screw driver clamping head described in the utility model can not only be applicable to and contain that connect can quilt The screw of magnetic is rotated with operation, and is equally applicable to contain that connect and be rotated with can not be by the screw of magnetic, Therefore the utlity model has advantage applied widely.

Claims

1, a kind of motor-driven screwdriver chuck, comprise the power transmission shaft of being located at the chuck axle center and the holder that is fixed on this power transmission shaft, this power transmission shaft one end is connected with motor-driven screwdriver handle and the driving that can be subjected to and rotating, its other end is the socket part of the head of screw of can pegging graft, this holder end inwardly is provided with one can contain the hat cavity that connects head of screw, this cavity be surrounded on above-mentioned socket part around, its top inner wall has magnetic, it is characterized in that: annular spread has some inlays on the perisporium of described cavity proximal port, each inlay protrudes from the inner face of this perisporium, the outside of perisporium is provided with a stopper slot, accommodates an elasticity corral hoop in the groove on each inlay.

2, motor-driven screwdriver chuck according to claim 1 is characterized in that: described inlay is for spherical.

3, motor-driven screwdriver chuck according to claim 1 and 2, it is characterized in that: described power transmission shaft is a polygonal, its socket part is a cross.