CN2403525Y

CN2403525Y - locking type drill chuck

Info

Publication number: CN2403525Y
Application number: CN 00213250
Authority: CN
Inventors: 杨桂模; 谭兴达; 孙康俊; 宫军波
Original assignee: SHANDONG WEIDA MACHINE TOOL GROUP CORP
Current assignee: SHANDONG WEIDA MACHINE TOOL GROUP CORP
Priority date: 2000-01-19
Filing date: 2000-01-19
Publication date: 2000-11-01
Anticipated expiration: 2010-01-19

Abstract

The utility model relates to a locking drill chuck, it comprises back cover, the brill body, bearing pad, bearing, screw cover, spring leaf, front cover, fender lid, and brill body front end excircle is equipped with the ratchet, is equipped with the pawl on the spring leaf, and relative part rotation can be done with the screw cover to the front cover, and the arc on the front cover oppression spring leaf is protruding during the rotation, and ratchet meshing on pawl and the brill body realizes locking, the utility model has the advantages of locking function can not make the drilling tool not hard up because of vibration or impact during the use, has rational in infrastructure, stable performance, and reliable operation uses advantages such as safety, is applicable to the clamping of various drilling tools.

Description

Locking type clamping head of drill

The utility model relates to a kind of drilling tool clamping device, specifically a kind of locking type clamping head of drill.

We know, existing drill chuck is by drill body, jaw, screw, nut sleeve, bearing, bearing gasket, protheca, compositions such as back cover and door, the back cover, bearing gasket interference respectively is connected on the drill body, three jaws are installed in respectively in the inclined hole of three five equilibriums on the drill body, screw is installed in the screw groove of drill body, and the threaded engagement on screw and the jaw forms thread transmission, nut sleeve and screw interference fit, nut sleeve is provided with protheca outward, the protheca inwall is provided with key, and nut sleeve is provided with keyway, and protheca is connected through key with nut sleeve, moving for preventing the protheca string, at drill body front end interference fit joint door, during use, hand is twisted the protheca rotation, protheca drives screw through nut sleeve and rotates, screw drives in the inclined hole of jaw on drill body through screw thread and moves forward and backward, thereby three-jaw is opened or closure, to reach the purpose of unclamping or clamping drilling tool, the deficiency of said structure is, drill chuck is when work, because vibration or impact, drill chuck is easily loosening, have a strong impact on operating efficiency, poor stability.

The purpose of this utility model is exactly to provide a kind of rational in infrastructure in order to overcome above-mentioned the deficiencies in the prior art, has locking function, high efficiency, safe in utilization, locking type clamping head of drill efficiently.

For achieving the above object, a kind of locking type clamping head of drill of the utility model, include the back cover, drill body, jaw, bearing gasket, bearing, screw, nut sleeve, protheca, it is characterized in that drill body front end cylindrical is provided with ratchet, spring leaf is housed in the nut sleeve, spring leaf is provided with arc convex and ratchet, the protheca inwall is provided with groove, arc convex on the spring leaf passes the hole on the nut sleeve sidewall, match with the groove on the protheca inwall, protheca can be done relative to part with nut sleeve and rotate, the arc convex during rotation on the protheca pressuring spring sheet, the ratchet engagement on ratchet and the drill body.

The utility model is owing to adopt said structure, and having overcome present drill chuck does not have locking device or the inconvenient deficiency of locking.It manipulates fast, reliable, safety, convenience, has advantages such as rational in infrastructure, easy to assembly, stable performance, reliable operation, is applicable to the clamping of various drilling tools.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a decomposing schematic representation of the present utility model;

Fig. 3 be among the utility model Fig. 1 D-D to schematic diagram.

As shown in Figure 1 and Figure 2, a kind of locking type clamping head of drill of the utility model, it is provided with back cover 1, drill body 2, protheca 3, bearing gasket 4, bearing 5, screw 6, nut sleeve 7, jaw 8, door 9, wherein the pass of the structure of back cover 1, bearing gasket 4, bearing 5, screw 6, jaw 8, door 9 and coupled parts is a prior art, and this does not describe in detail.

The utility model is provided with ratchet 10 at drill body 2 front end cylindricals, as shown in Figure 3, be equipped with spring leaf 14 with it mutually, spring leaf is fixed in the nut sleeve 7, spring leaf 14 is provided with ratchet 11 and two arc-shaped convex 12,13, and nut sleeve 7 lower ends are provided with an inner chamber, are provided with pair of holes 15 on intracavity sidewall, two circular arc projectioies 12,13 on the spring leaf 14 are passed hole 15 and are contacted with protheca 3 inwalls.Nut sleeve 7 has three keys 16, protheca 3 inwalls are provided with groove 17,18,19, protheca 3 front ends are provided with three pawls 20, as shown in Figure 2, on the spring leaf 14 circular arc projection 13 match with groove 19, circular arc projection 12 matches with groove 17,18, between three keys that three pawls 20 on the protheca 3 insert on the nut sleeve 7.

The utility model rotates with holding tight protheca 3 when work, and the circular arc projection 12 on the spring leaf 14 is in groove 17, and circular arc projection 13 drives nut sleeve 7, screw 6 rotations by spring leaf 14 in groove 19, thereby realizes clamping, the release function of drill chuck.When near clamping, screw 6 stop motions.When torque reached certain numerical value, protheca 3 can be done relative running with nut sleeve 7, and three pawls of protheca 3 front ends contact with three keys 16 on the nut sleeve 7, and nut sleeve 7 remains in operation, and drove screw 6 runnings, and clamping work pieces.At protheca 3 during with nut sleeve 7 relative runnings, circular arc projection 12 on the spring leaf 14 forwards in the groove 18, and circular arc projection 13 is left groove 19 simultaneously, is pressed in the nut sleeve inner chamber, ratchet 11 on the promotion spring leaf 14 contacts with the ratchet 10 on the drill body, thereby realizes the function of locking.When unclamping, move just in time opposite.

The utlity model has locking function, use fast, convenient, can or not impact making drilling tool loosening, have rational in infrastructure, easy to assembly, stable performance, reliable operation, advantage such as safe in utilization, be applicable to the clamping of various drilling tools because of vibration.

Claims

1, a kind of locking type clamping head of drill, include back cover, drill body, jaw, bearing gasket, bearing, screw, nut sleeve, protheca, it is characterized in that drill body front end cylindrical is provided with ratchet, spring leaf is housed in the nut sleeve, spring leaf is provided with arc convex and ratchet, the protheca inwall is provided with groove, arc convex on the spring leaf passes the hole on the nut sleeve sidewall, match with the groove on the protheca inwall, protheca can be done relative to part with nut sleeve and rotate, arc convex during rotation on the protheca pressuring spring sheet, the ratchet engagement on ratchet and the drill body.