CN202556323U

CN202556323U - Quick clamping device for screwdriver bit

Info

Publication number: CN202556323U
Application number: CN2012202182922U
Authority: CN
Inventors: 王亮
Original assignee: NINGBO LIANGYE ELECTRIC APPLIANCE CO Ltd
Current assignee: NINGBO LIANGYE ELECTRIC APPLIANCE CO Ltd
Priority date: 2012-05-16
Filing date: 2012-05-16
Publication date: 2012-11-28
Anticipated expiration: 2022-05-16

Abstract

The utility model discloses a quick clamping device for a screwdriver bit. The quick clamping device comprises a shaft body, a clamp and a limiting subassembly, wherein a first radial hole and a second radial hole are formed in the shaft body and internally provided with steel balls; a polygonal groove with a first spring at the bottom end is arranged in the shaft body; the clamp is sleeved outside the shaft body and is matched with the limiting subassembly; popping pins with concave grooves are arranged above the first spring, and are matched with the steel balls in the second radial hole; a first concave port provided with an elastic rubber check ring is arranged on a position at the internal wall of the clamp and opposite to the first radial hole; a gasket is arranged opposite to the part below the first radial hole in the external wall of the shaft body; and a second spring is arranged between the gasket and the limiting subassembly. With adoption of the quick clamping device having the design, the screwdriver bit can be quickly installed and fixed, and is hard to release, and the convenience for use is ensured; during use, the screwdriver cannot be damaged due to instantaneous extruding and rusting, so that the service life is prolonged.

Description

The Fast clamping device of screwdriver screwdriver bit

Technical field

The utility model relates to a kind of sleeve joint device of screw screwdriver bit, particularly the Fast clamping device of screwdriver screwdriver bit.

Background technology

Can there be following problem in tradition muff joint fast: the action of insertion screw screwdriver bit can't singlehandedly be done in (1), and is inconvenient in the operation; (2), when operation has false touch or bump enclosing cover often, cause that enclosing cover is instantaneous to move down because of evading under the sleeve enclosing cover from the screw screwdriver bit; Drop and cause the screw screwdriver bit to break away from, the puzzlement operating personnel, the fixed groove size of (3) possibility coping screw screwdriver bit is provided with nonstandard; And can't be locked in joint, when the screw screwdriver bit gets loose, if when the screw screwdriver bit is down state; This screw screwdriver bit just waits these problems because of gravity factor drops, and makes to use inconvenience; And the embodiment of traditional quick muff joint is that planar inner wall with beam ring compresses steel ball; The screw screwdriver bit is fixed in the slotted eye; But this design support the effect of pulling because the planar inner wall of beam ring is not ideal enough, make that to support the effect of pulling bad, screwdriver bit is come off.

The utility model content

The purpose of the utility model be provide for the deficiency that solves above-mentioned prior art a kind of simple in structure, operation fast, more good convenient, the Fast clamping device that improves the screwdriver screwdriver bit in service life of fixing and demolition of screwdriver bit.

To achieve these goals, the Fast clamping device of the screwdriver screwdriver bit that the utility model designed comprises axis body, beam ring and limit assembly; Said axis body top is provided with one and above first radially hole, and said axis body below is provided with one and above second radially hole, said second radially hole and first radially all be combined with steel ball in the hole; In axis body, be provided with the polygonal groove that supplies the screw screwdriver bit to get into, polygonal bottom land end is provided with first spring, and said beam ring is sheathed on the axis body outside; And cooperate with limit assembly; It is characterized in that above first spring, being combined with and eject pin, and should ejection sell and be provided with groove, and can with the second steel ball matching and fixing in the hole radially; Said beam ring inwall with respect to first radially the position of hole be provided with first recess; Be combined with the elastic caoutchouc back-up ring on said first recess, on the outer wall of axis body with respect to first radially hole below be provided with pad, between pad and limit assembly, be provided with second spring.

Above-mentioned design directly one-handed performance need not drop-down beam ring to the function that screwdriver bit positions, and just can screwdriver bit be inserted in the axis body; This design effect through the elastic caoutchouc back-up ring, with first radially the steel ball in the hole effectively compress, realize effectively being fixed in screwdriver bit in the slotted eye; Can not come off easily, therefore beam ring has guaranteed the convenience of using because second spring is done equidirectional motion and fixing to the effect and the screwdriver bit of limited block simultaneously; Through design to elastic parts; Make in use can not can because of extruding and the friction of moment, cause screwdriver bit to damage, improve service life.

Being provided with second recess above with respect to pad on the axis body outer wall, be combined with elastic spring on said second recess, it is better fixing to make that through this design screwdriver bit obtains.

Said axis body is a hexagonal axis.

The Fast clamping device of the screwdriver screwdriver bit that the utility model obtains, above-mentioned design directly one-handed performance need not drop-down beam ring to the function that screwdriver bit positions; Just can screwdriver bit be inserted in the axis body, this design effect through the elastic caoutchouc back-up ring, with first radially the steel ball in the hole effectively compress; Realization effectively is fixed in screwdriver bit in the slotted eye, can not come off easily, and beam ring is because second spring is done equidirectional motion and fixing to the effect and the screwdriver bit of limited block simultaneously; Therefore guaranteed the convenience of using, through design to elastic parts, make in use can not can because of extruding and the friction of moment; Cause screwdriver bit to damage, improve service life.

Description of drawings

Fig. 1 is the overall structure sketch map of embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is a sectional view of deviating from the A-A of Fig. 2 under the screwdriver bit situation:

Fig. 4 is the sectional view that inserts the A-A of Fig. 2 under the screwdriver bit situation;

Fig. 5 is that integrally-built ladder cuts open design sketch.

Among the figure: axis body 1, polygonal groove 11, first radially hole 12, second radially hole 13, second recess 14, beam ring 2, first recess 21, steel ball 3, screwdriver bit 30, eject pin 4, groove 41, first spring 5, elastic caoutchouc back-up ring 6, pad 7, limited block 8, second spring 9, elastic spring 10.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Embodiment:

Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 5, the Fast clamping device of the screwdriver screwdriver bit that present embodiment provides comprises axis body 1, beam ring 2 and limit assembly 8; Said axis body 1 top is provided with one and above first radially hole 12; Said axis body 1 below is provided with one and above second radially hole 13, said second radially hole 13 and first radially all be combined with steel ball 3 in the hole 12, in axis body 1, be provided with the polygonal groove 11 that supplies the screw screwdriver bit to get into; Polygonal groove 11 bottoms are provided with first spring 5; Said beam ring 2 is sheathed on axis body 1 outside, and cooperates with limit assembly 8, above first spring 5, is combined with to eject pin 4; And this ejection pin 4 is provided with groove 41; And can with second steel ball 3 matching and fixing in the hole 13 radially, said beam ring 2 inwalls with respect to first radially the position of hole 12 be provided with first recess 21, be combined with elastic caoutchouc back-up ring 6 on said first recess 21; On the outer wall of axis body 1 with respect to first radially hole 12 below be provided with pad 7, between pad 7 and limit assembly 8, be provided with second spring 9.In the said structure first radially hole 12 and second radially the number of hole 13 can decide according to the requirement in the specific embodiment, and the number of steel ball in first radially hole 12 and second radially the number of hole 13 is corresponding.

Being provided with second recess 14 above with respect to pad 7 on axis body 1 outer wall, be combined with elastic spring 10 on said second recess 14.

As priority scheme: axis body 1 is a hexagonal axis, and said structure just considers that as priority scheme the shape of axis body 1 can be decided according to the requirement of specific embodiment.

Above-mentioned structural design; Concrete operations such as Fig. 3, shown in Figure 4: the installation of this screwdriver bit 30 can realize one-handed performance; Structure is simpler; Only need singlehanded screwdriver bit 30 to be inserted in the polygonal grooves 11 (screwdriver bit 30 bottoms with eject pin 4 contact), screwdriver bit 30 making every effort to promote to make and eject sheath 4 down, be positioned at the second radially just rolling toward polygonal groove 11 centers naturally of steel ball 3 of hole 13 (owing to ejection is sold 4 and is provided with groove 41) this moment to bottom offset; When steel ball rolls; Originally with the limited block 8 of its apical grafting just under the elastic force effect of second spring 9 to bottom offset, again because limited block 8 is interconnective with beam ring 2, institute is so that beam ring 2 is also done and screwdriver bit 30 equidirectional displacements; Finally be fixed on elastic caoutchouc back-up rings 6 in first recess 21 of beam ring 2 just will be positioned at first radially the steel ball 3 of hole 12 push up to screwdriver bit 30, screwdriver bit 30 is fixed in the polygonal groove 11 of axis body 1.

If will take out screwdriver bit 30 time, on push away beam ring 2 and make elastic caoutchouc circle 6 in first recess 21 on the beam ring 2 also to top offset, be positioned at this moment first radially hole 12 unclamp with steel ball 3 natures and the screwdriver bit 3 of screwdriver bit 30 apical graftings originally; Simultaneously also can driving on the limited block 8 to top offset of beam ring 2 moved, second radially the steel ball 3 in the hole 13 make that just to outer rolling ejecting pin 4 can pop up under the elastic force of first spring 5, thereby with screwdriver bit 30 releases.

Claims

1. the Fast clamping device of a screwdriver screwdriver bit; Comprise axis body (1), beam ring (2) and limit assembly (8); Said axis body (1) top is provided with one and above first radially hole (12); Said axis body (1) below is provided with one and above second radially hole (13), said second radially hole (13) and first radially all be combined with steel ball (3) in the hole (12), in axis body (1), be provided with the polygonal groove (11) that supplies the entering of screw screwdriver bit; Polygonal groove (11) bottom is provided with first spring (5); Said beam ring (2) is sheathed on axis body (1) outside, and cooperates with limit assembly (8), it is characterized in that being combined with ejection pin (4) in first spring (5) top; And this ejection pin (4) is provided with groove (41); And can with second steel ball (3) matching and fixing in the hole (13) radially, said beam ring (2) inwall with respect to first radially the position of hole (12) be provided with first recess (21), be combined with elastic caoutchouc back-up ring (6) on said first recess (21); On the outer wall of axis body (1) with respect to first radially the below of hole (12) be provided with pad (7), between pad (7) and limit assembly (8), be provided with second spring (9).

2. the Fast clamping device of screwdriver screwdriver bit according to claim 1 is characterized in that the top with respect to pad (7) is provided with second recess (14) on axis body (1) outer wall, is combined with elastic spring (10) on said second recess (14).

3. the Fast clamping device of screwdriver screwdriver bit according to claim 1 and 2 is characterized in that said axis body (1) is a hexagonal axis.