CN202606947U

CN202606947U - Drill chuck provided with novel clamp claw

Info

Publication number: CN202606947U
Application number: CN 201220133757
Authority: CN
Inventors: 柳尧亭; 于庆滋
Original assignee: DAWANG HARDWARE PRODUCTS (WEIHAI) Co Ltd
Current assignee: DAWANG HARDWARE PRODUCTS (WEIHAI) Co Ltd
Priority date: 2012-04-01
Filing date: 2012-04-01
Publication date: 2012-12-19
Anticipated expiration: 2022-04-01

Abstract

The utility model relates to a drill chuck provided with a novel clamp claw and solves the problem that an existing drill chuck easily swings radially and is unstable. The drill chuck is provided with a pushing lead screw, a main machine connection hole, a pushing nut, the clamp claw and a drill chuck body, wherein two rectangular grooves are arranged at the connecting position of the clamp claw and the pushing nut. The drill chuck can be widely applied to the field of mechanical processing.

Description

A kind of drill chuck with novel jaw

Technical field

The utility model relates to the anchor clamps of a kind of machining with cutter, especially relates to a kind of drill chuck with novel jaw.

Background technology

Often use operations such as instruments such as lathe, electric drill are holed, milling in the production and processing activity; Experience long-term application and improvement though be installed in the drill chuck that is used for cutters such as clamping drilling bit, milling cutter on these Device Host working shafts, still had many deficiencies.

For example, Granted publication number be CN 201291311Y public announcement of a patent application a kind of keyless drill chuck, as shown in Figure 1, it is provided with and promotes screw mandrel 30, promotes nut 31, shell 32, drill chuck body 33, jaw 34.Its operation principle is: with hand rotation case 32; Driving drill chuck body 33 relatively rotates with the promotion screw mandrel 30 that is connected on the equipment working shaft; Force to promote nut 31, promote nut 31 and under the effect of the screw thread that promotes screw mandrel 30, move down, drive three jaws 34 and move down along the jaw hole along with shell 32 and synchronous together the doing with promotion screw mandrel 30 of drill chuck body 33 relatively rotate; Space between three jaw 34 lower ends also dwindles thereupon, thereby clamps the cutter of required clamping.This moment the starting device motor, drill chuck will drive its work by clamp-on tool, thereby accomplishes process.

The subject matter that this drill chuck exists is: jaw is provided with cannelure at it with position that the promotion nut is connected; After the T type plush copper of jaw is put into T type groove with matching, though jaw can not move up and down with respect to promoting nut, but can be in T type groove lateral rotation; If do not add other positioner; V-arrangement acrosome for example, the chucking power of jaw is not firm, and the service precision of cutter descends.

Summary of the invention

The utility model is to the low problem of above-mentioned drill chuck precision, and a kind of drill chuck that has novel jaw cheaply is provided.

For this reason, the utility model is provided with and promotes screw mandrel, main frame connecting hole, promotes nut, jaw, drill chuck body, it is characterized in that jaw is provided with two rectangular channels at it with position that the promotion nut is connected.

The utility model is owing to change the cannelure of jaw head the rectangular channel of two symmetries into, make jaw put into can not be random behind the T type groove that promotes on the nut teeter, thereby make the drill chuck working stability, precision improves greatly.

Description of drawings

Fig. 1 is the structural representation of the utility model background technology;

Fig. 2 is the overall structure sketch map of the utility model;

Fig. 3 is the STRUCTURE DECOMPOSITION sketch map of the utility model;

Fig. 4 A, Fig. 4 B and Fig. 4 C are the clamping jaw structure sketch mapes of the utility model.

Symbol description among the figure:

1. promotion screw mandrel; 2. main frame connecting hole; 3. promotion nut; 4.T type groove; 5. jaw; 6. connecting hole; 7. jaw hole; 8. ball hole; 9. fixed cover; 10. cutter hole; 11. drill chuck body; 12. place kick; 13. deep-slotted chip breaker; 14. cannelure; 15. rectangular channel; 16. cut off; 30. promotion screw mandrel; 31. promotion nut; 32. shell; 33. drill chuck body; 34. jaw; 35.V type acrosome.

The specific embodiment

As shown in Figures 2 and 3; Drill chuck body 11 is oblique to be processed with three symmetrically and to run through jaw hole 7 up and down; Upper end and 7 corresponding positions, three jaw holes at drill chuck body 11 are provided with three ball holes 8, and the axis of lower end edge drill chuck body 11 is processed with the cutter hole 10 that is suitable for cutter assembling external diameter greater than maximum, and the upper end that promotes screw mandrel 1 is processed with and assembles the main frame connecting hole 2 that the power transmission shaft of the Device Host of this keyless drill chuck is complementary; The upper end edge axis of drill chuck body 11 is processed with and promotes the connecting hole 6 of screw mandrel 1 lower end external diameter coupling; The lower end that promotes screw mandrel 1 is movably set in the connecting hole 6, is provided with between connecting hole 6 and the cutter hole 10 to cut off 16, thereby both are not communicated; After putting into, cutter can directly not withstand on the promotion screw mandrel 1, in order to avoid cause damage promoting screw mandrel 1.

Be processed with cannelure 14 in the lower end of drill chuck body 11, this cannelure 14 can be for continuous, also can with jaw 5 corresponding settings, and show as unconnected state, its shape can be poroid etc. for circular hole, square poroid or triangle; Cannelure 14 is connected with jaw hole 7; Envelope has lubricating grease in the cannelure 14; Guarantee that jaw 5 can switch to the lubricating grease at cannelure 14 places in the process of moving up and down, because drill chuck body 11 lower ends and shell (not shown) closely cooperate, so lubricating grease can be to exosmosis.

The outer surface that promotes screw mandrel 1 is processed with screw thread; Promote nut 3 was processed with and promoted screw mandrel 1 outer surface thread coupling along the axis internal thread; Promoting nut 3 is rotatably connected on the promotion screw mandrel 1; The lower end, outer that promotes nut 3 is provided with the T shape plush copper of mating with T shape groove 4 with corresponding position, three jaw 5 upper ends along the upper end that diametric(al) is processed with 4, three jaws 5 of T shape groove of three openings, and T shape plush copper is sheathed in the corresponding T shape groove 4.

Three jaws 5 are slidingly installed in respectively in the jaw hole 7, shown in Fig. 4 A, Fig. 4 B and Fig. 4 C, jaw 5 its with promote the position that nut 3 is connected and be provided with two rectangular channels 15; On jaw 5, begin to be processed with deep-slotted chip breaker 13 from the upper end, this deep-slotted chip breaker 13 is preferably hemispherical, and its diameter is identical with the diameter in ball hole 8; To put into ball hole 8 with the identical place kick 12 of they two diameters, and make place kick 12 half the in the deep-slotted chip breaker 13 of jaw 5, half the in addition in the ball hole 8 of drill chuck body 11; Again fixed cover 9 is put into ball hole 8; Place kick 12 is positioned, and this place kick is preferably steel ball, also can adopt the spheroid of other materials that meet the demands.

In the process that jaw 5 moves up and down; Place kick 12 can be played jaw is carried out spacing effect, makes it and can not swing, and give certain lubricating; Place kick 12 is rolled in the process that moves up and down of jaw 5 back and forth; Make the friction between itself and the jaw 5 become rolling friction, frictional force reduces greatly, has improved the flexibility that jaw 5 moves up and down.

Head at jaw 5; Both sides along deep-slotted chip breaker 13 are processed with a rectangular channel 15 respectively; Distance between two rectangular channels 15 is identical with the distance of T type groove lower ending opening, put into the T type groove 4 that promotes nut 3 in the T of jaw 5 type plush copper after, jaw 5 can not radially wobble; Thereby accomplished the location of jaw 5 better, made the precision of drill chuck improve greatly.

Explain in the face of the course of work of the present invention down:

Cutter is inserted in the cutter hole 10; Rotate promotion screw mandrel 1 with hand; Because three jaws 5 are sheathed in the jaw hole 7, the upper end of three jaws 5 is sheathed on respectively and promotes in three corresponding T shape grooves 4 that nut 3 is provided with, and the rotation that therefore promotes screw mandrel 1 forces and promotes nut 3 and promote screw mandrel 1 and do and relatively rotate; Promoting nut 3 moves down under the effect of the screw thread that promotes screw mandrel 1; Drive three jaws 5 and move down along jaw hole 7, the space between three jaw 5 lower ends also dwindles thereupon, puts into the cutter in cutter hole 10 until clamping.

This moment, the starting device motor promoted screw mandrel 1 rotation at a high speed under the drive of working shaft, because drill chuck body 11 and the static action of inertia that promotes nut 3; There is stronger impulsive force to play rotation in the starting stage that promotes screw mandrel 1 startup to force drill chuck body 11 to follow one of which with promotion nut 3; This impulsive force further makes three jaw 5 clamp-on tools, and the reaction force between cutter and the workpiece afterwards also relatively rotates forcing drill chuck body 11 and promote to do between nut 3 and the promotion screw mandrel 1; This has increased the chucking power of 5 pairs of cutters of three jaws equally automatically; Thereby possessed the function of self-tightening, make whole keyless drill chuck have very high precision and stability, along with the rotation of motor; Jaw 5 steps up cutter and rotates gradually together, thereby accomplishes mechanical processing process.

In addition, ball hole 8 is laterally got through on drill chuck body 11, also can be obliquely to get through perpendicular to jaw 5, and half is in the ball hole 8 to make locking ball 12, and half is in the deep-slotted chip breaker 13, accomplishes the location of jaw 5.

Claims

1. drill chuck with novel jaw, it is provided with and promotes screw mandrel, main frame connecting hole, promotes nut, jaw, drill chuck body, it is characterized in that said jaw is provided with two rectangular channels in the position that it is connected with said promotion nut.