CN209902283U

CN209902283U - Quick clamping drill chuck

Info

Publication number: CN209902283U
Application number: CN201920576247.6U
Authority: CN
Inventors: 于成银; 魏宁波
Original assignee: Shandong Weida Machinery Co Ltd
Current assignee: Shandong Weida Machinery Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-01-07
Anticipated expiration: 2029-04-25

Abstract

The utility model provides a fast clamping drill chuck, which solves the technical problem that the working efficiency of the existing drill chuck is lower, it is including boring the body, the clamping jaw, the nut, the steel ball, jump ring and hou gai, the clamping jaw sets up respectively in boring the body inslot along circumference evenly distributed on boring the body, it is fixed with the hou gai through the jump ring to bore body rear end, it is equipped with bores the body screw thread to bore body front end excircle, the nut is through boring body screw thread and boring body threaded connection, the nut inner wall is equipped with the recess, the recess both sides are established respectively to nut clamping position face and nut and are loosened the locating surface, the nut is loosened the setting of the outstanding nut inner wall of locating surface and perpendicular to nut inner wall, two sides of clamping jaw front end are established respectively to clamping jaw clamping position face and clamping jaw and are loosened the locating surface, the clamping jaw front end is through clamping jaw clamping position face and clamping jaw and is loosened the recess that.

Description

Quick clamping drill chuck

Technical Field

The utility model belongs to the technical field of the drilling tool technique and specifically relates to a quick clamping drill chuck is related to.

Background

The existing drill chuck generally comprises a drill body, clamping jaws, nuts and an outer sleeve, wherein the clamping jaws are respectively installed in three equally-divided inclined holes of a main body, the nuts are installed in nut grooves of the main body, and the nuts and the threads of the clamping jaws form thread transmission and can do spiral motion, so that the working states of clamping and loosening are realized; however, when the drill chuck works, in order to ensure the clamping performance, the thread pitches of the clamping jaw and the nut are relatively small, so that the number of running turns is generally about 20 turns when the drill chuck runs from the maximum clamping range to the minimum clamping range or a slightly larger clamping range, and the working efficiency is seriously influenced.

Disclosure of Invention

The utility model provides a quick clamping drill chuck with lower working efficiency, which aims at the technical problem of lower working efficiency of the existing drill chuck.

Therefore, the utility model discloses a bore the body, the clamping jaw, the nut, the steel ball, jump ring and hou gai, the clamping jaw sets up respectively in boring the body inslot along circumference evenly distributed on boring the body, it is fixed with the hou gai through the jump ring to bore body rear end, it is equipped with bores body screw thread to bore body front end excircle, the nut through boring body screw thread with bore body threaded connection, the nut inner wall is equipped with the recess, the recess both sides are established respectively to the nut and are pressed from both sides tight locating surface and nut and loosen the locating surface, the nut loosens the setting of the outstanding nut inner wall of locating surface and perpendicular to nut inner wall, two sides of clamping jaw front end are established respectively to the clamping jaw and are pressed from both sides tight locating surface and clamping jaw and loosen the locating surface, the clamping.

Preferably, the number of the clamping jaws is 2 or 3, and the number of the grooves is the same as that of the clamping jaws.

Preferably, the clamping jaw is provided with a clamping jaw round pin hole, the drill body is provided with a round pin hole, a round pin is arranged at the clamping jaw round pin hole, the clamping jaw is fixed on the drill body through the round pin, and the clamping jaw can rotate around the round pin.

Preferably, the clamping jaw is provided with a positioning ball groove, and the steel ball is matched with the positioning ball groove.

Preferably, the spherical surface of the positioning ball groove comprises three transition arcs, namely a low arc, a middle arc and a high arc.

The utility model has simple structure, the excircle at the front end of the drill body is provided with a thread, the nut and the thread can be connected together through the thread, the clamping jaw is fixed in the groove of the drill body through a round pin, and the nut can move back and forth through the thread of the drill body, thereby pushing the clamping jaw to loosen and clamp; the top of the clamping jaw is provided with a positioning ball groove which is provided with three transition arcs, the heights of the three transition arcs are slightly different, the steel ball rolls and rubs when being clamped in the area, the friction force during driving can be reduced, input is increased, partial sliding friction can be generated when the steel ball is loosened, and loosening torque can be increased, so that the clamping state is more reliable, practical and convenient.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is a cross-sectional view of the drill body;

FIG. 4 is a schematic view of a drill body;

FIG. 5 is a front view of the jaws;

FIG. 6 is a rear view of the jaws;

FIG. 7 is a schematic view of a jaw configuration;

FIG. 8 is a schematic view of a nut;

FIG. 9 is a schematic view of a nut;

FIG. 10 is an assembly view of the drill body, round pin, clamping jaw and steel ball;

FIG. 11 is a schematic view of the assembly of the body, round pin, clamping jaw and steel ball;

FIG. 12 is a cross-sectional view of the detent ball slot in the jaw;

FIG. 13 is a cross-sectional view of the jaw in a released condition;

FIG. 14 is a top cross-sectional view of the jaw in a released condition;

FIG. 15 is a schematic view of the detent ball groove engaging the ball in the released condition;

FIG. 16 is a cross-sectional view in the locked state;

FIG. 17 is a top sectional view in the locked state;

FIG. 18 is a schematic view of the detent ball groove engaging the ball in the locked position.

The symbols in the drawings illustrate that:

1. a drill body; 2. a nut; 3. a clamping jaw; 4. a steel ball; 5. a clamp spring; 6. a rear cover; 7. a round pin; 8. drilling body threads; 9. drilling a body groove; 10. a round pin hole; 11. a positioning ball groove; 12. clamping the clamping jaw to clamp the positioning surface; 13. the clamping jaw loosens the positioning surface; 14. a clamping jaw round pin hole; 15. the nut clamps the positioning surface; 16. loosening the positioning surface of the nut; 17. low arc; 18. a middle arc; 19. high arc; 20. a thread; 21. and (4) a groove.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the utility model discloses a bore the body 1, clamping jaw 3, nut 2, steel ball 4, jump ring 5 and hou gai 6, the number of clamping jaw 3 sets up to 3, 3 clamping jaws 3 set up respectively in boring 3 of the body 1 along circumference evenly distributed bore the body inslot 9, as shown in fig. 3, fig. 4 and 5, be equipped with clamping jaw round pinhole 14 on the clamping jaw 3, bore and be equipped with round pinhole 10 on the body 1, clamping jaw round pinhole 14 department sets up round pin 7, clamping jaw 3 passes through round pin 7 to be fixed on boring the body 1, clamping jaw 3 can be rotatory around round pin 7, it is fixed with hou gai 6 that the body 1 rear end passes through jump ring 5 to bore, realize boring 1 axial fixed.

The excircle of the front end of the drill body 1 is provided with a drill body thread 8, the nut 2 is internally provided with a thread 20 matched with the drill body thread 8, the nut 2 is in threaded connection with the drill body 1 through the drill body thread 8, and the nut 2 can rotate through threaded connection and drive the clamping jaw 3 so as to quickly realize clamping and loosening operations.

As shown in fig. 6, 7, 8, 9, 10 and 11, the inner wall of the nut 2 is provided with grooves 21, the number of the grooves 21 is the same as that of the clamping jaws 3, two sides of each groove 21 are respectively provided with a nut clamping positioning surface 15 and a nut loosening positioning surface 16, the nut loosening positioning surfaces 16 protrude out of the inner wall of the nut 2 and are arranged perpendicular to the inner wall of the nut 2, two side surfaces of the front end of each clamping jaw 3 are respectively provided with a clamping jaw clamping positioning surface 12 and a clamping jaw loosening positioning surface 13, and the front end of each clamping jaw 3 is arranged in the groove 21 of the nut 2 through the clamping jaw clamping positioning surface 12 and the clamping jaw loosening positioning surface 13.

The clamping jaw 3 is provided with a positioning ball groove 11, the steel ball 4 is matched with the positioning ball groove 11, as shown in figure 12, the spherical surface of the positioning ball groove 11 comprises three transition arcs which are respectively a low arc 17, a middle arc 18 and a high arc 19, the radian of the high arc 19 in the positioning ball groove 11 is sequentially higher than the radians of the middle arc 18 and the low arc 17, the heights of the low arc 17, the middle arc 18 and the high arc 19 are slightly different, the steel ball 4 is in rolling friction when the transition arc area is clamped, and the purposes of reducing friction when the steel ball is clamped and improving the unlocking torque when the steel ball is loosened can be achieved.

As shown in fig. 13, 14 and 15, when the nut 2 rotates clockwise relative to the drill body 1, the nut clamping and positioning surface 15 drives the clamping jaw clamping and positioning surface 12, so that the clamping jaws 3 rotate clockwise around the round pins 7, the minimum clamping range can be reached after the three clamping jaws 3 are in rotating contact, and the drill chuck is in a clamping state, wherein the steel ball 4 is positioned in the lower arc 17 of the clamping jaw positioning ball groove.

As shown in fig. 16, 17 and 18, when nut 2 is rotated counterclockwise, nut release positioning surface 16 drives jaw release positioning surface 13 so that jaws 3 rotate about round pin 7, and a fully released condition is achieved with less than 90 degrees of rotation; meanwhile, the steel ball 4 slides from the low arc 17 of the positioning ball groove 11 to the middle arc 18 of the positioning ball groove 11 and finally reaches the position of the middle arc 19 in the positioning ball groove 11, because the high arc 19 of the positioning ball groove 11 is slightly higher than the middle arc 18 of the positioning ball groove, and the middle arc 18 of the positioning ball groove 11 is slightly higher than the low arc 17 of the positioning ball groove 11, huge resistance is generated when the steel ball is loosened, and the loosening moment is effectively increased.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a quick clamping drill chuck, its is including boring body, clamping jaw, nut, steel ball, jump ring and hou gai, the clamping jaw set up respectively in bore the body inslot along circumference evenly distributed on the body, bore the body rear end pass through the jump ring with the back lid is fixed, bore body front end excircle and be equipped with and bore body screw thread, the nut through bore body screw thread with bore body threaded connection, its characterized in that, the nut inner wall is equipped with the recess, the recess both sides are established respectively to nut and are pressed from both sides tight locating surface and nut and loosen the locating surface, the nut is loosened the locating surface and is outstanding nut inner wall and perpendicular to nut inner wall setting, two sides of clamping jaw front end are established respectively to clamping jaw and are pressed from both sides the locating surface and clamping jaw and are loosened the locating surface through the clamping jaw and are located in the recess of nut.

2. The quick-clamping drill chuck according to claim 1, characterized in that the number of said clamping jaws is 2 or 3, and the number of said grooves is the same as the number of said clamping jaws.

3. The quick-clamping drill chuck according to claim 1, wherein the clamping jaw is provided with a clamping jaw round pin hole, the drill body is provided with a round pin hole, a round pin is arranged at the clamping jaw round pin hole, the clamping jaw is fixed on the drill body through the round pin, and the clamping jaw can rotate around the round pin.

4. The quick-clamping drill chuck as claimed in claim 1, wherein said clamping jaws are provided with positioning ball grooves, and said steel balls are engaged with said positioning ball grooves.

5. The quick-clamping drill chuck according to claim 4, wherein the spherical surface of said positioning ball groove includes three transitional arcs, respectively a low arc, a medium arc and a high arc.