CN210080753U

CN210080753U - Axial locking drill chuck

Info

Publication number: CN210080753U
Application number: CN201920576257.XU
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: 2020-02-18
Anticipated expiration: 2029-04-25

Abstract

The utility model provides an axial locking drill chuck, it has solved the lower technical problem of current drill chuck security performance and efficiency, it includes drill body, clamping jaw, screw, nut cover, bearing pad, shell fragment, overcoat and back lid, three clamping jaw sets up respectively in the three inclined hole along circumference evenly distributed on the drill body, screw and clamping jaw adopt threaded connection, nut cover interference fit is on the screw, the shell fragment sets up in the nut cover, overcoat and nut cover cooperate, the overcoat rotates and drives the nut cover to rotate, the nut cover drives the screw to rotate, the nut drives the clamping jaw to move; the overcoat inner wall axial sets up upper groove and low groove respectively, and the up end of nut cover and lower terminal surface set up respectively with upper groove and low groove assorted last locating pawl and lower locating pawl, the utility model discloses but wide application in drilling tool technical field.

Description

Axial locking drill chuck

Technical Field

The utility model belongs to the technical field of the drilling tool technique and specifically relates to an axial locking drill chuck is related to.

Background

The drill chuck is one of the main accessories in the electric tool industry and the machine tool industry, is widely applied to electric hand drills, drilling machines and the like, is matched with the electric drills and is used for clamping tools and other working heads; however, when the drill chuck works, the drill chuck is easy to loosen due to the fact that the vibration frequency of part of the electric drill is high and the strength of the electric drill is high, working efficiency is seriously affected, and safety is poor.

Disclosure of Invention

The utility model provides an axial locking drill chuck with higher safety performance and efficiency, which aims at the technical problems of lower safety performance and efficiency of the existing drill chuck.

Therefore, the utility model comprises a drill body, a clamping jaw, a screw sleeve, a bearing pad, a spring plate, an outer sleeve and a rear cover, wherein the three clamping jaws are respectively arranged in three inclined holes which are uniformly distributed along the circumferential direction on the drill body; the inner wall of the outer sleeve is axially provided with an upper groove and a lower groove respectively, and the upper end surface and the lower end surface of the nut sleeve are provided with an upper positioning claw and a lower positioning claw which are matched with the upper groove and the lower groove respectively.

Preferably, the upper groove and the lower groove are respectively provided with a plurality of positioning claws, and the number of the upper positioning claws and the number of the lower positioning claws are respectively the same as that of the upper groove and the lower groove.

Preferably, a locking groove is arranged between the upper groove and the lower groove of the inner wall of the outer sleeve along the circumferential direction.

Preferably, the number of the locking grooves is 3, the locking grooves are respectively a first locking groove, a second locking groove and a third locking groove, and the first locking groove and the second locking groove are adjacent to each other in the circumferential direction.

Preferably, the elastic sheet is provided with two positioning protrusions, the circumferential wall of the nut sleeve is provided with two driving ports which are respectively arranged as a first driving port and a second driving port, and the two driving ports correspond to the two positioning protrusions on the elastic sheet.

Preferably, two sides of the lower groove are respectively set as a left driving surface and a right driving surface of the outer sleeve, the lower end surface of the nut sleeve is uniformly provided with 3 driving blocks, and two side surfaces of two sides of the first driving opening, corresponding to the driving blocks, are respectively set as a left driving surface and a right driving surface of the nut sleeve.

Preferably, a clamp spring is arranged in a clamp spring groove in the outer sleeve, and the outer sleeve is fixed on the drill body through the clamp spring.

The utility model has simple structure, the groove is arranged in the circumferential direction of the inner wall of the outer sleeve, and the positioning claws matched with the groove are arranged at the upper end and the lower end of the screw sleeve, when the drill chuck is in a free state, the drill chuck is driven to operate by the elastic sheet fixed in the screw sleeve, and at the moment, the upper positioning claw and the lower positioning claw on the screw sleeve are both in a suspended state; when the locking mechanism is in a locking state, the upper positioning claw and the lower positioning claw on the nut sleeve respectively enter the corresponding upper groove and the lower groove of the outer sleeve, so that the loosening torque between the locked nut sleeve and the outer sleeve is increased, and the locking state is more reliable, practical and convenient.

Drawings

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

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

FIG. 3 is a schematic structural view of a spring plate;

FIG. 4 is a front view of the nut sleeve;

FIG. 5 is a top view of the nut sleeve;

FIG. 6 is a schematic structural view of the nut sleeve;

FIG. 7 is a schematic structural view of the nut sleeve;

FIG. 8 is a top view of the outer cover;

FIG. 9 is a schematic view of the structure of the jacket;

FIG. 10 is a schematic view of the structure of the outer cover;

FIG. 11 is a schematic view of the combination of the nut shell and the outer shell in a free state;

FIG. 12 is a top plan view of the coupling of the nut shell and the outer shell in a free state;

FIG. 13 is an assembled cross-sectional view of the spring plate in combination with the outer cover in a free state;

FIG. 14 is a schematic view of the assembly of the nut shell and the outer shell in a locked state;

FIG. 15 is a schematic view of the assembly of the nut shell and the outer shell in a locked state;

FIG. 16 is a schematic view of the combination of the nut sleeve and the outer sleeve after the outer periphery of the outer sleeve is cut away in a locked state;

fig. 17 is an assembled cross-sectional view of the combination of the spring and the housing in the locked state.

The symbols in the drawings illustrate that:

1. a drill body; 2. a clamping jaw; 3. a nut; 4. a nut sleeve; 5. a bearing; 6. a bearing pad; 7. a spring plate; 8. a jacket; 9. a rear cover; 10. a clamp spring; 11. a first positioning projection; 12. a first drive port; 13. a lower groove; 14. a lower positioning claw; 15. an upper groove; 16. an upper positioning claw; 17. a drill body ratchet; 18. a second positioning projection 18; 19. a second drive port; 20. the left driving surface of the nut sleeve; 21. a first locking groove; 22. a second locking groove; 23. a third locking groove; 24. the left driving surface of the outer sleeve; 25. the right driving surface of the outer sleeve; 26. the right driving surface of the nut sleeve; 27. the block is driven.

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 drill body 1, clamping jaw 2, screw 3, screw cover 4, bearing 5, bearing pad 6, shell fragment 7, overcoat 8 and back lid 9, three clamping jaw 2 sets up respectively in the three inclined hole along circumference evenly distributed on drill body 1, screw 3 adopts threaded connection with clamping jaw 2, the screw of screw 3 and clamping jaw 2 forms screw drive mechanism, bearing 5 is located the support groove of screw 3 rear end face, bearing pad 6 is located between the terminal surface of bearing 5 and drill body 1; the nut sleeve 4 is in interference fit with the nut 3, the outer sleeve 8 is matched with the nut sleeve 4, the outer sleeve 8 rotates to drive the nut sleeve 4 to rotate, the nut sleeve 4 drives the nut 3 to rotate, and the nut 3 drives the clamping jaw 2 to move; the rear cover 9 is arranged at the rear part in the outer sleeve 8 and is in clearance fit with the outer sleeve 8, the rear cover 9 is fixed on the drill body 1, and the rear cover 9 does not rotate relative to the drill body 1.

The elastic sheet 7 is arranged in the nut sleeve 4, and as shown in fig. 3, two positioning protrusions, namely a first positioning protrusion 11 and a second positioning protrusion 18, are arranged on the elastic sheet 7; as shown in fig. 4, 5, 6 and 7, two driving ports are arranged on the circumferential wall of the nut sleeve 4, and are respectively provided with a first driving port 12 and a second driving port 19, the first driving port 12 corresponds to a second positioning protrusion 18 on the elastic sheet 7, the second driving port 19 corresponds to a first positioning protrusion 11 on the elastic sheet 7, the elastic sheet 7 and the outer sleeve 8 are mutually matched, a clamp spring 10 is arranged in a clamp spring groove in front of the outer sleeve 8, and the outer sleeve 8 is fixed on the drill body 1 through the clamp spring 10.

As shown in fig. 8, 9 and 10, the inner wall of the outer sleeve 8 is axially provided with an upper groove 15 and a lower groove 13, the upper end surface and the lower end surface of the nut sleeve 4 are respectively provided with an upper positioning claw 16 and a lower positioning claw 14 which are matched with the upper groove 15 and the lower groove 13, the upper groove 15 and the lower groove 13 are respectively provided with a plurality of upper positioning claws 16 and lower positioning claws 14 along the inner wall of the outer sleeve 8, and the number of the upper positioning claws 16 and the number of the lower positioning claws 14 are respectively the same as the number of the upper grooves 15 and the number of the lower grooves; locking grooves are formed between the upper groove 15 and the lower groove 13 on the inner wall of the outer sleeve 8 along the circumferential direction, the number of the locking grooves is 3 along the circumferential direction, the locking grooves are respectively formed into a first locking groove 21, a second locking groove 22 and a third locking groove 23, and the first locking groove 21 and the second locking groove 22 are arranged adjacent to each other along the circumferential direction; two sides of the lower groove 13 are respectively provided with an outer sleeve left driving surface 24 and an outer sleeve right driving surface 25, the lower end surface of the nut sleeve 4 is uniformly provided with 3 driving blocks 27, and two sides of the first driving port 12 corresponding to two side surfaces of the driving blocks are respectively provided with a nut sleeve left driving surface 20 and a nut sleeve right driving surface 26.

As shown in fig. 11, 12 and 13, when the drill chuck is in a free state, the outer sleeve right driving surface 25 drives the nut sleeve right driving surface 26 to operate, at this time, the second positioning protrusion 18 is in the first locking groove 21, the first positioning protrusion 11 is in the third locking groove 23, and both the upper positioning claw 16 and the lower positioning claw 14 on the nut sleeve 4 are in a suspended state; as shown in fig. 14, 15, 16 and 17, when the drill chuck is in a locked state, the outer sleeve left driving surface 24 pushes the nut sleeve left driving surface 20, at this time, the second positioning protrusion 18 is in the second locking groove 22, the first positioning protrusion 11 is pressed by the outer sleeve protrusion, so that the elastic sheet 7 and the drill body ratchet 17 are engaged and locked, and simultaneously, the upper positioning pawl 16 and the lower positioning pawl 14 on the nut sleeve 4 respectively rotate into the upper groove 15 and the lower groove 13 of the outer sleeve 8, so as to fix the nut sleeve 4 and the outer sleeve 8, thereby effectively increasing the release torque between the locked nut sleeve 4 and the outer sleeve 8, and effectively ensuring the reliability of the locked state and having better safety performance. Thus ensuring the reliability of the chuck.

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. An axial locking drill chuck comprises a drill body, clamping jaws, a nut sleeve, a bearing pad, an elastic sheet, an outer sleeve and a rear cover, wherein the three clamping jaws are respectively arranged in three inclined holes which are uniformly distributed along the circumferential direction on the drill body; the nut sleeve is characterized in that an upper groove and a lower groove are axially and respectively arranged on the inner wall of the outer sleeve, and an upper positioning claw and a lower positioning claw which are matched with the upper groove and the lower groove are respectively arranged on the upper end surface and the lower end surface of the nut sleeve.

2. The axially locking drill chuck as claimed in claim 1, wherein the upper and lower grooves are respectively provided in plural numbers along the inner wall of the outer sleeve, and the number of the upper and lower positioning claws is respectively the same as the number of the upper and lower grooves.

3. The axially locking drill chuck as claimed in claim 1, wherein the locking groove is circumferentially disposed between the upper groove and the lower groove on the inner wall of the outer sleeve.

4. The axially locking drill chuck as claimed in claim 3, wherein the number of the locking grooves is 3, and the locking grooves are respectively a first locking groove, a second locking groove and a third locking groove, and the first locking groove and the second locking groove are adjacently arranged in the circumferential direction.

5. The axial locking drill chuck as claimed in claim 1, wherein the spring plate is provided with two positioning protrusions, the circumferential wall of the nut sleeve is provided with two driving ports, which are respectively provided as a first driving port and a second driving port, and the two driving ports correspond to the two positioning protrusions on the spring plate.

6. The axially locking drill chuck as claimed in claim 5, wherein the two sides of the lower groove are respectively provided with a left driving surface and a right driving surface, the lower end surface of the nut sleeve is uniformly provided with 3 driving blocks, and the two corresponding side surfaces of the driving block at the two sides of the first driving port are respectively provided with a left driving surface and a right driving surface.

7. The axially locking drill chuck as claimed in claim 1, wherein a snap spring is disposed in a snap spring groove inside the outer sleeve, and the outer sleeve is fixed on the drill body by the snap spring.