Drill chuck for numerical control machine tool

Abstract

The utility model discloses a drill chuck for a numerical control machine tool, which comprises a fixed seat, a plurality of clamping jaws arranged in an annular array and used for clamping a drill bit; the outer portion of the fixing base is sleeved with a threaded rotating cylinder in a threaded mode, straight sliding type extrusion mechanisms are installed on the outer portion of the fixing base in an annular array penetrating and inserting mode, and the contact face of the threaded rotating cylinder and the straight sliding type extrusion mechanisms is an inclined face used for changing the direction of force. By means of the arrangement mode that the clamping jaws are matched with the elastic clamping mechanism, the clamping columns are separated from the clamping jaws in a penetrating and clamping mode through lifting movement of the connecting plate, so that locking of the clamping jaws can be unlocked, then the clamping jaws slide horizontally, the clamping jaws are separated from the clamping jaws in a penetrating and inserting mode, and the clamping jaws can be locked. And then the clamping jaws are pulled out from the gaps between the adjacent limiting columns, so that disassembly and reverse operation of the clamping jaws are achieved, a new clamping jaw can be replaced, and disassembly and assembly of the clamping jaws are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of drill chucks, in particular to a drill chuck for numerically controlled machine tools. Background Art

[0002] In the prior art, such as the patent with application number 202122472926.9, a drill chuck for a CNC machine tool is mentioned, including a chuck body and a fixed seat, the chuck body and the fixed seat are rotatably connected with a locking sleeve, the side wall of the chuck body is provided with a groove, the inner wall of the locking sleeve is threadedly connected with a threaded sleeve, and the inner wall of the threaded sleeve is welded with three first wedge blocks in a circumferential array, the three first wedge blocks are each abutted against a second wedge block, and the second wedge blocks are each welded with a clamping seat, the clamping seat is connected with a shock absorbing device, and the shock absorbing device includes a plurality of connecting rods, and the plurality of connecting rods are welded at equal intervals on the side wall of the chuck body, and three spacer plates are welded at equal intervals on the inner wall of the chuck body.

[0003] In the above patent, the drill bit is clamped and fixed by a clamp seat, but the clamp seat may wear or break during long-term use. However, the above patent cannot disassemble and install the clamp seat, which makes it inconvenient to replace the clamp seat, making it difficult for the clamp seat to stably clamp the drill bit after long-term use. Utility Model Content

[0004] The utility model aims to provide a drill chuck for a numerically controlled machine tool to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a drill chuck for a CNC machine tool, comprising:

[0006] A fixing seat, wherein a plurality of clamping claws are arranged inside the fixing seat, and the plurality of clamping claws are arranged in a ring array for clamping the drill bit;

[0007] The external thread of the fixing seat is sleeved with a threaded rotating cylinder, and the outside of the fixing seat is interspersed with straight-sliding extrusion mechanisms in a circular array. The contact surface between the threaded rotating cylinder and the straight-sliding extrusion mechanism is an inclined surface, which is used to change the direction of the force. The threaded movement of the threaded rotating cylinder promotes the horizontal movement of each straight-sliding extrusion mechanism, so that each clamping jaw forms a synchronous inward contraction movement to clamp the drill bit, and the top of the clamping jaw is clamped with an elastic clamping mechanism, and the elastic clamping mechanism is installed on the fixing seat.

[0008] Preferably, a main shaft is mounted on the fixing seat, and the axis of the fixing seat coincides with the axis of the main shaft.

[0009] Preferably, a limiting column is slidably inserted and connected to the clamping jaw, and the limiting column is installed inside the fixing seat, and the limiting column is arranged centripetally relative to the fixing seat.

[0010] Preferably, the fixing seat is provided with through slots in a circular array, and the straight-sliding extrusion mechanism is slidably and interlacedly connected with the inner cavity of the through slots.

[0011] Preferably, the straight-sliding extrusion mechanism comprises:

[0012] An extrusion block, the extrusion block is slidably connected with the inner cavity of the through slot, and a slot is formed on the top of the extrusion block;

[0013] A limit rod, the limit rod being installed inside the slot;

[0014] A limit block is slidably and interlacedly connected with the limit rod, and the limit block is connected with the inner wall of the through slot.

[0015] Preferably, the elastic clamping mechanism comprises:

[0016] A sliding seat, wherein the top of the inner wall of the fixed seat is provided with a sliding groove matching the sliding seat;

[0017] A clamping column, wherein the clamping column is slidably inserted and connected to the top of the sliding seat, and the clamping column is inserted and clamped with the top of the clamping claw;

[0018] A first spring, one end of which is connected to the clamping column, and one end of which is connected to the inner wall of the sliding seat;

[0019] A connecting plate, one end of which is connected to the top of the clamping column, and the connecting plate is slidably and interlacedly connected with the sliding seat and the fixed seat.

[0020] Preferably, the elastic clamping mechanism further includes:

[0021] A guide rod, one end of which is connected to a sliding seat, and the guide rod is connected to a fixed seat through sliding interlacing;

[0022] A second spring is movably sleeved on the outside of the guide rod.

[0023] Technical effects and advantages of the utility model:

[0024] The utility model utilizes the arrangement mode of matching the clamping jaws and the elastic clamping mechanism, and through the upward movement of the connecting plate, the clamping column is separated from the interlaced clamping connection with the clamping jaw, so that the locking of the clamping jaw can be unlocked, and then the clamping jaw is horizontally slid to separate the clamping jaw from the interlacing between the clamping jaws, and then the clamping jaw is pulled out from the gap between the adjacent limiting columns, so as to realize the disassembly of the clamping jaw, and the reverse operation can be performed so that the new clamping jaw can be replaced, thereby facilitating the disassembly and assembly of the clamping jaw, and making the clamping of the drill bit more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0027] Figure 3 It is a schematic diagram of the internal structure of the elastic clamping mechanism of the utility model.

[0028] Figure 4 It is a schematic diagram of the internal structure of the straight-sliding extrusion mechanism of the utility model.

[0029] In the figure: 1. fixed seat; 11. limiting column; 2. clamping claw; 3. threaded rotating cylinder; 4. straight sliding extrusion mechanism; 41. extrusion block; 42. limiting rod; 43. limiting block; 5. elastic clamping mechanism; 51. sliding seat; 52. clamping column; 53. first spring; 54. connecting plate; 55. guide rod; 56. second spring; 6. main shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model provides Figure 1-4 The drill chuck for a CNC machine tool shown in the figure comprises: a fixed seat 1, a plurality of clamping jaws 2 are arranged inside the fixed seat 1, and the plurality of clamping jaws 2 are arranged in a ring array for clamping a drill bit; a threaded rotating cylinder 3 is sleeved on the external thread of the fixed seat 1, an extrusion groove is provided on the top of the threaded rotating cylinder 3, and the inner wall of the extrusion groove is in an inclined state, which fits with the inclined surface of the bottom of the extrusion block 41 to facilitate changing the direction of the force, and through the threaded connection between the fixed seat 1 and the threaded rotating cylinder 3, the straight-sliding extrusion mechanism 4 can be pushed by the threaded rotation of the threaded rotating cylinder 3, so that the straight-sliding extrusion mechanism 4 can be inserted into the slot Under the limit of, horizontal sliding is performed, so that through the synchronous centripetal movement of multiple straight-sliding extrusion mechanisms 4 relative to the fixed seat 1, multiple clamping jaws 2 can be squeezed inwardly. The outside of the fixed seat 1 is interspersed with straight-sliding extrusion mechanisms 4 in an annular array. The contact surface between the threaded rotating cylinder 3 and the straight-sliding extrusion mechanism 4 is an inclined surface, which is used to change the direction of the force. The threaded movement of the threaded rotating cylinder 3 promotes the horizontal movement of each straight-sliding extrusion mechanism 4, so that each clamping jaw 2 forms a synchronous inward contraction movement to clamp the drill bit, and the top of the clamping jaw 2 is clamped with an elastic clamping mechanism 5, which is installed on the fixed seat 1.

[0032] Furthermore, a main shaft 6 is mounted on the fixing seat 1 , and the axes of the fixing seat 1 and the main shaft 6 coincide with each other, so as to facilitate connection with an external handheld drilling rig, thereby facilitating driving the fixing seat 1 to rotate.

[0033] Furthermore, a limiting column 11 is slidably inserted and connected to the clamping jaw 2. The limiting column 11 is installed inside the fixing seat 1. The limiting column 11 is arranged centripetally relative to the fixing seat 1. The limiting column 11 is used to limit the movement of the clamping jaw 2, so that the movement of the clamping jaw 2 is more stable.

[0034] Furthermore, the fixing seat 1 is provided with through slots in an annular array, and the straight-sliding extrusion mechanism 4 is slidably and interlacedly connected with the inner cavity of the through slots, so as to facilitate the sliding of the straight-sliding extrusion mechanism 4 to be limited.

[0035] Furthermore, the straight-sliding extrusion mechanism 4 includes: an extrusion block 41, which is slidably and interlacedly connected with the inner cavity of the through-slot, and a slot is provided on the top of the extrusion block 41; a limiting rod 42, which is installed inside the slot; a limiting block 43, which is slidably and interlacedly connected with the limiting rod 42, and the limiting block 43 is connected to the inner wall of the through-slot, and the extrusion block 41 is used to facilitate the extrusion of the clamping jaw 2, and the sliding interlacing between the limiting rod 42 and the limiting block 43 facilitates the sliding of the extrusion block 41, so that the movement of the extrusion block 41 is more stable.

[0036] Furthermore, the elastic clamping mechanism 5 includes: a sliding seat 51, the top of the inner wall of the fixed seat 1 is provided with a sliding groove that matches the sliding seat 51; a clamping column 52, the clamping column 52 is slidably inserted and connected to the top of the sliding seat 51, and the clamping column 52 is inserted and clamped with the top of the clamping claw 2; a first spring 53, one end of the first spring 53 is connected to the clamping column 52, and one end of the first spring 53 is connected to the inner wall of the sliding seat 51; a connecting plate 54, one end of the connecting plate 54 is connected to the top of the clamping column 52, and the connecting plate 54 is slidably inserted and connected with the sliding seat 51 and the fixed seat 1. The elastic clamping mechanism 5 also includes: a guide rod 55, one end of the guide rod 55 is connected to the sliding seat 51 The second spring 56 is movably sleeved on the outside of the guide rod 55, and the movement of the clamping column 52 is conveniently controlled through the connecting plate 54. The compression deformation of the first spring 53 facilitates the elastic support of the clamping column 52. A card slot is provided on the top of the clamping jaw 2, so that the cooperation between the clamping column 52 and the card slot is more stable. The linear motion of the sliding seat 51 is more stable through the insertion between the guide rod 55 and the fixed seat 1. The compression deformation of the second spring 56 facilitates the elastic support of the sliding seat 51, so as to reset the support of the clamping jaw 2, thereby unlocking the clamping of the drill bit.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drill chuck for a CNC machine tool, comprising: A fixed seat (1), wherein a plurality of clamping jaws (2) are arranged inside the fixed seat (1), and the plurality of clamping jaws (2) are arranged in a ring array and are used to clamp a drill bit; The invention is characterized in that: the external thread of the fixing seat (1) is sleeved with a threaded rotating cylinder (3); the outside of the fixing seat (1) is interspersed with straight-sliding extrusion mechanisms (4) in a circular array; the contact surface between the threaded rotating cylinder (3) and the straight-sliding extrusion mechanism (4) is an inclined surface for changing the direction of force; the threaded movement of the threaded rotating cylinder (3) drives the horizontal movement of each straight-sliding extrusion mechanism (4), so that each clamping jaw (2) forms a synchronous inward contraction movement to clamp the drill bit; the top of the clamping jaw (2) is clamped with an elastic clamping mechanism (5); and the elastic clamping mechanism (5) is installed on the fixing seat (1).

2. A drill chuck for a CNC machine tool according to claim 1, characterized in that: A main shaft (6) is mounted on the fixing seat (1), and the axes of the fixing seat (1) and the main shaft (6) coincide with each other.

3. A drill chuck for a CNC machine tool according to claim 1, characterized in that: The clamping jaw (2) is slidably connected to a limiting column (11), the limiting column (11) is installed inside the fixing seat (1), and the limiting column (11) is arranged centripetally relative to the fixing seat (1).

4. A drill chuck for a CNC machine tool according to claim 1, characterized in that: The fixing seat (1) is provided with through slots in an annular array, and the straight-sliding extrusion mechanism (4) is slidably and interlacedly connected with the inner cavity of the through slots.

5. The drill chuck for a CNC machine tool according to claim 1, characterized in that: The straight-sliding extrusion mechanism (4) comprises: An extrusion block (41), the extrusion block (41) is slidably connected to the inner cavity of the through-slot, and a slot is formed on the top of the extrusion block (41); A limiting rod (42), wherein the limiting rod (42) is installed inside the slot; A limit block (43) is slidably and interlacedly connected with the limit rod (42), and the limit block (43) is connected with the inner wall of the through slot.

6. A drill chuck for a CNC machine tool according to claim 1, characterized in that: The elastic clamping mechanism (5) comprises: A sliding seat (51), wherein the top of the inner wall of the fixed seat (1) is provided with a sliding groove matching the sliding seat (51); A clamping column (52), wherein the clamping column (52) is slidably inserted and connected to the top of the sliding seat (51), and the clamping column (52) is inserted and clamped with the top of the clamping claw (2); A first spring (53), one end of which is connected to the clamping column (52), and one end of which is connected to the inner wall of the sliding seat (51); A connecting plate (54), one end of which is connected to the top of the clamping column (52), and the connecting plate (54) is connected to the sliding seat (51) and the fixed seat (1) in a sliding and interlaced manner.

7. A drill chuck for a CNC machine tool according to claim 6, characterized in that: The elastic clamping mechanism (5) further comprises: A guide rod (55), one end of which is connected to the sliding seat (51), and the guide rod (55) is connected to the fixed seat (1) in a sliding and interlaced manner; A second spring (56), the second spring (56) is movably sleeved on the outside of the guide rod (55).

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