CN116037996A - Quick clamping type drill bit assembly and clamping and fixing method thereof - Google Patents

Abstract

The invention relates to a drill bit and a clamping technology thereof, in particular to a quick clamping type drill bit assembly and a clamping fixing method thereof, wherein the assembly comprises a drill bit body and a clamp body, and an axial constraint mechanism and a radial constraint mechanism are arranged between a drill handle and the clamp body; after the drill shank is completely clamped with the axial constraint mechanism, the radial constraint structure is locked through a threaded fastening structure arranged outside the clamp body, so that no movement is generated between the drill bit body and the clamp body; the radial constraint mechanism is elastically attached to the drill shank when the drill shank is completely clamped with the axial constraint mechanism; the drill shank is clamped with the clamp body through the axial constraint mechanism, so that the clamping speed is higher; when the drill shank is completely clamped with the clamp body, the radial constraint mechanism is elastically attached to the drill shank, no gap exists between the radial constraint mechanism and the drill shank, the radial constraint mechanism is firmly connected with the drill shank through the threaded fastening structure, and the whole clamping process is very rapid and labor-saving on the premise that drills with different specifications can be clamped.

Description

Quick clamping type drill bit assembly and clamping and fixing method thereof

Technical Field

The invention relates to a drill bit and a clamping technology thereof, in particular to a quick clamping type drill bit assembly and a clamping and fixing method thereof.

Background

The drill chuck consists of a drill chuck, an elastic shifting ring, a connecting block and a rear cover. In the drill chuck, the axial positioning is realized by using a connecting block, through the circumferential toggle jack, the drill is axially moved under the action of the threads in the elastic toggle ring, the drilling tool is accurately and automatically centered and clamped, when the drill chuck provided with different drilling tools (such as a center drill, a drill bit, a reamer, a tap and the like) is required to be adopted for work, the positioning screw can be loosened, the positioning screw is fastened after the sector body is rotated to a required position, and the multi-station movement of the drill chuck is realized.

The drill chuck is of various kinds and basically the same principle, namely, a conical inclined plane is arranged in the drill sleeve, and the conical inclined plane on the inner wall of the drill sleeve is provided with an internal thread; the upper part of the connecting block is provided with a conical external thread, the connecting block can be drawn close to the axle center when extending out of the drill sleeve through the conical external thread and the conical internal thread, and the connecting block is far away from the axle center when retracting into the drill sleeve, so that the drill handle of the drill bit can be firmly clamped, and the drill bits with different specifications can be adapted.

Although the application of the drill chuck is very wide, the defects still exist, and the main aspects are that the clamping is laborious and the steps are complicated; at the beginning of clamping the drill bit, the clamping jaws are manually rotated to draw the clamping jaws together and extend out of the drill clamping sleeve; because three clamping jaws are in contact friction clamping with the drill shank, in order to avoid circumferential slipping of the drill bit and the clamping jaws during working, the bevel gear on the lengthened force arm is meshed with a circle of teeth on the edge of the elastic shifting ring, and then the bevel gear is driven to slightly rotate by the lengthened force arm so as to drive the elastic shifting ring to further rotate, so that the clamping jaws are tightly attached to the drill shank. In the process, the drill bit is required to be clamped in two steps, and a large force is required to be applied to the lengthened force arm to enable the clamping jaw to be tightly attached to the drill shank for clamping, so that time and labor are wasted.

Disclosure of Invention

The present invention is directed to a quick-clamping drill bit assembly and a clamping and fixing method thereof, so as to solve the problems set forth in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the quick clamping type drill bit assembly comprises a drill bit body and a clamp body, wherein one section of the drill bit body matched with the clamp body is a drill handle, and an axial constraint mechanism and a radial constraint mechanism are arranged between the drill handle and the clamp body;

after the drill shank is completely clamped with the axial constraint mechanism, the radial constraint structure is locked through a threaded fastening structure arranged outside the clamp body, so that no movement is required between the drill bit body and the clamp body;

the radial constraint mechanism is elastically attached to the drill shank when the drill shank is completely clamped with the axial constraint mechanism.

A quick-snap drill bit assembly as described above: the axial restraint mechanism is composed of a clamping block, a wedge protrusion and an elastic structure;

the wedge protrusions are arranged on the surface of the drill shank along the circumferential direction, and the clamping blocks are arranged at one end of the clamp body with the opening; the clamping blocks are distributed along the circumferential direction of the clamp body and are movably arranged on the clamp body along the radial direction of the clamp body through an elastic structure;

the wedge-shaped convex surface is a wedge surface facing the clamp body, and the back surface of the wedge surface is a straight surface; the side of the clamping block facing the drill bit body is a reverse wedge surface, and the back surface of the reverse wedge surface is also a straight surface.

A quick-snap drill bit assembly as described above: the outer wall of the clamp body is provided with a through hole for the clamping block to move along the radial direction of the clamp body and penetrate through the clamp body, the side edge of the through hole is provided with a concave channel, and the side wall of the clamping block is provided with a side edge in sliding fit with the concave channel.

A quick-snap drill bit assembly as described above: the elastic structure comprises a penetrating rod which is arranged along the length direction of the clamping block and is fixed with the clamping block, an L-shaped frame body which is fixed on the outer wall of the clamp body, and a clamping spring which is elastically connected with the L-shaped frame body and the clamping block;

the upper part of the L-shaped frame body is provided with a through hole, the penetrating rod penetrates through the through hole and is in sliding fit with the through hole, one end of the clamping spring is attached to the clamping block, and the other end of the clamping spring is attached to the L-shaped frame body.

A quick-snap drill bit assembly as described above: a rotating sleeve is rotatably arranged on the outer wall of the clamp body, and a clamping column parallel to the axis of the clamp body is arranged on the outer edge of the rotating sleeve; the clamping block is provided with a chute on one surface facing the rotating sleeve, and the clamping column is in sliding fit in the chute;

the outer wall of the clamp body is also integrally provided with a circle of thrust ladder, and the rotating sleeve is arranged between the thrust ladder and the clamping block.

A quick-snap drill bit assembly as described above: the radial constraint mechanism comprises a plurality of inserted bars, a plurality of telescopic blocks and an abutting spring, wherein the inserted bars are arranged in the clamp body and are uniformly distributed along the circumferential direction of the clamp body, the telescopic blocks are movably arranged in the clamp body, and the abutting springs are elastically connected with the telescopic blocks and the inserted bars;

the inserting rod is parallel to the axis of the clamp body, an inserting channel is arranged on the telescopic block, and the inserting rod is in sliding insertion with the inserting channel; the close spring is positioned in the insertion channel, one end of the close spring is abutted against the bottom of the insertion channel, and the other end of the close spring is attached to the insertion rod;

the end part of the drill shank is provided with a shank end inclined plane, and one surface of the telescopic block, which faces the drill shank, is an inverse inclined plane.

A quick-snap drill bit assembly as described above: the screw fastening structure comprises a side edge lug arranged on the outer side of the telescopic block, a side edge groove is formed in the clamp body in parallel to the axis direction of the clamp body, and the side edge lug slides in the side edge groove;

an external thread is arranged on a section of the outer wall of the clamp body far away from the opening, and the external thread is matched with an internal thread on the inner wall of the locking sleeve; the outer wall of the lateral edge lug is also provided with external threads, and is matched with the internal threads of the inner wall of the locking sleeve.

A quick-snap drill bit assembly as described above: the one end detachably that the drill bit body was kept away from to the clamp body installs the caudal peduncle, the one end that the caudal peduncle is close to the clamp body is provided with a plurality of mounting holes along circumference, and it is fixed with the clamp body to pass through the bolt in the mounting hole.

The clamping and fixing method of the quick clamping type drill bit assembly comprises the following steps:

step one, pre-loosening, checking whether the locking sleeve is screwed to the tail end of the clamp body, and ensuring that no overlapping area exists between the locking sleeve and the lateral edge groove so as to ensure that the internal thread on the inner wall of the locking sleeve is completely separated from the external thread on the outer wall of the lateral edge lug;

step two, clamping, namely enabling the wedge protrusions on the drill shank to be approximately aligned with the lateral edge grooves or the lateral edge convex blocks, and pushing the drill shank of the drill bit body to be installed into the clamp body through the opening of the clamp body; in the clamping process, the clamping block continuously slides outwards from the through hole, and when the clamping block slides outwards for a certain distance and then is folded quickly and is accompanied by a click, the straight surface on the wedge bulge is attached to the straight surface on the clamping block, namely the drill shank is completely clamped with the axial restraint mechanism; stopping pushing the drill bit body, and loosening the drill bit body, wherein at the moment, the reverse inclined plane is driven to be completely attached to the inclined plane of the handle end under the action of the elasticity of the attaching spring;

fastening and loosening prevention, and rotating the locking sleeve to enable the internal threads on the inner wall of the locking sleeve to be combined with the external threads on the outer wall of the lateral edge lug; the screw thread combination length of the locking sleeve and the lateral edge convex blocks is ensured to be equivalent to the screw thread combination length of the outer wall of the clamp body;

step four, checking, namely pushing and pulling the drill bit body positively and negatively along the axial direction of the drill bit body, and checking the axial clearance between the drill bit body and the clamp body; checking whether the bit body and the clamp body can rotate relatively; if the axial clearance between the drill bit body and the clamp body is large, the drill bit body needs to be disassembled, whether the clamping exists between the inserted rod and the insertion channel or not is checked, and the clamping is carried out again after the clamping is eliminated; if the rotation is free between the drill bit body and the clamp body, the locking sleeve is screwed back to the tail end of the clamp body again, the drill bit body is rotated in a small range, and then the circumferential position of the drill bit body relative to the clamp body is automatically corrected by utilizing the elasticity of the close spring; if the close spring cannot automatically correct the circumferential position of the bit body relative to the clamp body, the bit body is detached, and whether the clamping exists between the insert rod and the insert channel is checked.

Compared with the prior art, the invention has the beneficial effects that: the drill shank is clamped with the clamp body through the axial constraint mechanism, so that the clamping speed is higher; when the drill shank is completely clamped with the clamp body, the radial constraint mechanism is elastically attached to the drill shank, namely, no gap exists between the radial constraint mechanism and the drill shank, and a firm connection relationship is established between the radial constraint mechanism and the drill shank through the thread fastening structure, so that an anti-loosening effect is achieved; the whole clamping process is very rapid, no effort is required, and the drill bits with different specifications can be clamped, so that compared with the traditional drill chuck, the clamping device is more rapid, efficient and labor-saving.

Drawings

FIG. 1 is a schematic view of a construction of a quick-action drill bit assembly;

FIG. 2 is a schematic view of a construction of a quick-action drill bit assembly from another perspective;

FIG. 3 is a schematic view of a partially disassembled structure of a quick-release drill bit assembly;

FIG. 4 is a schematic view of the construction of the quick-release drill bit assembly with the shank and clamp removed;

FIG. 5 is a schematic view of the structure of a bit body in a quick-release bit assembly;

FIG. 6 is a partial schematic view of the swivel and latch and the resilient structure;

FIG. 7 is a schematic view of the structure of FIG. 6 after one of the clamping posts is detached from the chute;

FIG. 8 is a schematic view of the back structure of FIG. 7;

FIG. 9 is a schematic view of the clip body and one of the clip posts after being detached;

FIG. 10 is an enlarged view of FIG. 9 at a;

FIG. 11 is a bottom view of the clip body and components disposed thereon;

FIG. 12 is a cross-sectional view of FIG. 11;

FIG. 13 is a three-dimensional perspective view of FIG. 12;

in the figure:

1. a bit body; 101. wedge convex; 102. a handle end inclined plane;

2. a clamp body; 201. a tail handle; 202. a clamping block; 203. edge ridge; 204. penetrating the rod; 205. a clamping spring; 206. an L-shaped frame body; 207. a recessed channel; 208. a through hole; 209. a chute; 210. a clamping column; 211. a rotating sleeve; 212. thrust steps; 213. a telescopic block; 214. inserting a channel; 215. a rod; 216. attaching a spring; 217. locking the sleeve; 218. a side edge bump; 219. and a side edge groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Referring to fig. 1 to 13, as an embodiment of the present invention, the quick-clamping drill bit assembly is mainly applied to a working condition (such as reaming) with low drilling torque load, so as to replace the existing drill chuck, and realize quick and labor-saving disassembly and replacement of the drill bit.

The quick clamping type drill bit assembly comprises a drill bit body 1 and a clamp body 2, wherein one section of the drill bit body 1 matched with the clamp body 2 is a drill handle, the other section is a cutting section, and two chip removal grooves are spirally formed in the cutting section; an axial restraint mechanism and a radial restraint mechanism are arranged between the drill shank and the clamp body 2;

after the drill shank is completely clamped with the axial constraint mechanism, the radial constraint structure is locked through the fastening structure arranged outside the clamp body 2, so that no movement is needed between the drill bit body 1 and the clamp body 2.

The radial constraint mechanism is elastically attached to the drill shank when the drill shank is completely clamped with the axial constraint mechanism; the fastening structure is a threaded fastening structure, so that a self-locking and anti-loosening effect is achieved.

In the invention, the drill shank is clamped with the clamp body 2 through the axial constraint mechanism, so that the clamping speed is higher; when the drill shank is completely clamped with the clamp body 2, the radial constraint mechanism is elastically attached to the drill shank, namely, no gap exists between the radial constraint mechanism and the drill shank, and a firm connection relationship is established between the radial constraint mechanism and the drill shank through the thread fastening structure, so that an anti-loosening effect is achieved; the whole clamping process is very rapid, no effort is required, and the drill bits with different specifications can be clamped, so that compared with the traditional drill chuck, the clamping device is more rapid, efficient and labor-saving.

As a further scheme of the invention, the surface of the drill shank is fixedly provided with a plurality of wedge-shaped protrusions 101 along the circumferential direction, one end of the clamp body 2 with an opening is provided with a plurality of clamping blocks 202, and the plurality of clamping blocks 202 are distributed along the circumferential direction of the clamp body 2 and are movably arranged on the clamp body 2 along the radial direction of the clamp body 2 through an elastic structure;

the wedge-shaped convex part 101 is a wedge surface on one surface facing the clamp body 2, and the back surface of the wedge surface is a straight surface; the side of the clamping block 202 facing the drill bit body 1 is a reverse wedge surface, and the back surface of the reverse wedge surface is also a straight surface; the latch 202, the wedge 101, and the resilient structure form an axial restraint mechanism.

In the process of loading the drill shank into the clamp body 2 through one end of the opening of the clamp body 2, the wedge surface on the wedge convex 101 and the anti-wedge surface on the clamping block 202 are acted and mutually extruded; with the increase of the extrusion force, the elastic structure contracts and allows the clamping blocks 202 to move away along the radial direction of the clamp body 2, and the clamping blocks 202 are far away from each other along the radial direction of the clamp body 2; when the wedge convex 101 completely passes over the clamping block 202, the clamping block 202 is driven to reset under the action of the elastic structure, so that the clamping blocks 202 are quickly and mutually closed along the radial direction of the clamp body 2, the straight surface at the back of the rear wedge surface is mutually attached to the straight surface at the back of the reverse wedge surface, the axial constraint effect is achieved on the drill shank, and the drill shank is prevented from being separated from the clamp body 2.

Note that the elastic yielding of the elastic structure is along the radial direction of the clamp body 2, and the mutual acting force between the two straight surfaces needs to be overcome when the drill shank is separated from the clamp body 2, the force is parallel to the axial direction of the clamp body 2, and the elastic force of the elastic structure is perpendicular to the acting force between the two straight surfaces, so that the two forces cannot influence each other.

As a further scheme of the invention, a through hole 208 for the clamping block 202 to move along the radial direction of the clamping body 2 and penetrate through the clamping body 2 is formed in the outer wall of the clamping body 2, a concave channel 207 is formed on the side edge of the through hole 208, and a side edge 203 in sliding fit with the concave channel 207 is fixedly arranged on the side wall of the clamping block 202.

The clamping blocks 202 can only slide along the radial direction of the clamp body 2 by using the arranged through holes 208, the concave channels 207 and the edge 203, so that the clamping blocks 202 distributed along the circumferential direction of the clamp body 2 are always directed to the axle center of the clamp body 2, and the clamping blocks 202 are prevented from deviating from the radial direction of the clamp body 2.

As still further aspects of the present invention, the elastic structure includes a penetrating rod 204 disposed along the length direction of the clamping block 202 and fixed to the clamping block 202, an L-shaped frame 206 fixed to the outer wall of the clamping body 2, and a clamping spring 205 elastically connecting the L-shaped frame 206 and the clamping block 202;

the upper portion of the L-shaped frame 206 is provided with a through hole, the penetrating rod 204 penetrates through the through hole and is in sliding fit with the through hole, one end of the clamping spring 205 is attached to the clamping block 202, and the other end is attached to the L-shaped frame 206.

The penetrating rod 204 can prevent the clamping spring 205 from bending and deforming when being pressed, and the clamping spring 205 is matched with the L-shaped frame 206 to realize the elastic connection of the clamping block 202 and the clamp body 2, and ensure that the clamping block 202 always points to the axle center of the clamp body 2.

As a still further scheme of the invention, a rotating sleeve 211 is rotatably arranged on the outer wall of the clamp body 2, and a clamping column 210 parallel to the axis of the clamp body 2 is fixedly arranged on the outer edge of the rotating sleeve 211; a chute 209 is formed on one surface of the clamping block 202 facing the rotating sleeve 211, and the clamping column 210 is slidably embedded in the chute 209;

a circle of thrust step 212 is also integrally and fixedly arranged on the outer wall of the clamp body 2, and the rotating sleeve 211 is arranged between the thrust step 212 and the clamping block 202.

The thrust step 212 is matched with the clamping block 202, so that the rotating sleeve 211 can only rotate relative to the clamp body 2 and cannot axially slide.

When the clamped drill bit body 1 needs to be taken down, only the manual micro-rotating sleeve 211 is needed; when the rotation sleeve 211 rotates, the clamping column 210 is driven to rotate, and as the clamping column 210 is slidably embedded in the chute 209 and the clamping block 202 always points to the axle center of the clamp body 2, the rotation of the clamping column 210 can drive the chute 209 and the clamping block 202 to be far away from the axle center of the clamp body 2 along the radial direction of the clamp body 2 so as to realize the mutual separation of two straight surfaces, and finally, the drill bit body 1 is taken down.

As a still further aspect of the present invention, the radial constraint mechanism includes a plurality of inserting rods 215 fixedly disposed in the clip body 2 and uniformly distributed along the circumferential direction of the clip body 2, a plurality of telescopic blocks 213 movably disposed in the clip body 2, and a tightening spring 216 elastically connecting the telescopic blocks 213 and the inserting rods 215;

the inserting rod 215 is parallel to the axis of the clamp body 2, an inserting channel 214 is arranged on the telescopic block 213, and the inserting rod 215 is slidably inserted into the inserting channel 214; the close-fitting spring 216 is located in the insertion channel 214, one end of the close-fitting spring 216 is abutted against the bottom of the insertion channel 214, and the other end is abutted against the insertion rod 215;

the end of the drill shank is provided with a shank end inclined plane 102, and one surface of the telescopic block 213 facing the drill shank is an inverse inclined plane.

During the process of loading the drill shank into the clamp body 2, the shank end inclined plane 102 extrudes the reverse inclined plane to drive the telescopic block 213 to move along the axial direction of the clamp body 2; the telescopic block 213 continuously presses the abutting spring 216 when moving along the axial direction of the clamp body 2, so that the reverse inclined surface always abuts against the shank end inclined surface 102 of the end part of the drill shank when the drill shank is completely clamped with the axial constraint mechanism.

The insertion channel 214 and the insertion rod 215 play a role in movably guiding the telescopic block 213, so that the telescopic block 213 can only move along the axial direction of the clamp body 2.

As a still further aspect of the present invention, the screw fastening structure includes a lateral edge protrusion 218 fixedly disposed at the outer side of the telescopic block 213, a lateral edge groove 219 is formed on the clip body 2 parallel to the axial direction thereof, and the lateral edge protrusion 218 slides in the lateral edge groove 219;

an external thread is arranged on a section of the outer wall of the clamp body 2 far away from the opening, and the external thread is matched with an internal thread on the inner wall of the locking sleeve 217; the outer wall of the skirt lug 218 is also provided with external threads and is adapted to the internal threads of the inner wall of the locking sleeve 217.

When the drill shank is completely clamped with the axial constraint mechanism, the telescopic block 213 is tightly attached to the shank end inclined plane 102 at the end of the drill shank, and at the moment, the locking sleeve 217 is rotated to the side edge convex block 218 by rotating the locking sleeve 217; after the internal thread on the inner wall of the locking sleeve 217 is combined with the external thread on the outer wall of the lateral edge lug 218 for a certain length, one section of the internal thread on the inner wall of the locking sleeve 217 is combined with the external thread on the outer wall of the clamp body 2, and the other section of the internal thread on the inner wall of the locking sleeve 217 is combined with the external thread on the outer wall of the lateral edge lug 218; the inner threads on the inner wall of the locking sleeve 217 are respectively combined with the outer threads on the outer wall of the clamp body 2 and the outer threads on the outer wall of the lateral edge convex block 218, so that the telescopic block 213 is prevented from moving along the axis of the clamp body 2.

In combination, the drill shank is prevented from being detached from the holder body 2 by the engagement of the straight surface on the clamping block 202 and the straight surface on the back surface of the wedge 101; when the internal threads on the inner wall of the locking sleeve 217 are respectively combined with the external threads on the outer wall of the clamp body 2 and the external threads on the outer wall of the lateral edge lug 218, the drill handle can be prevented from excessively extending into the clamp body 2 when the drill handle is completely clamped with the axial restraint mechanism, so that axial spaciousness is generated.

Under the condition that the shank end inclined plane 102 and the reverse inclined plane are tightly attached, the radial clearance between the drill shank and the clamp body 2 can be eliminated, and finally the drill shank is firmly clamped in the clamp body 2.

At the beginning of clamping, only the wedge 101 on the drill shank is required to be approximately aligned with the side edge groove 219 or the side edge convex block 218, because after the drill bit body 1 is loosened when the drill shank is completely clamped with the axial constraint mechanism, the reverse inclined surface can be tightly attached to the shank end inclined surface 102 under the action of the elasticity of the attaching spring 216, so that the drill shank is automatically calibrated and adjusted.

As a still further scheme of the invention, the end of the clamp body 2 far away from the drill bit body 1 is detachably provided with the tail handle 201, one end of the tail handle 201 close to the clamp body 2 is provided with a plurality of mounting holes along the circumferential direction, the tail handle 201 and the clamp body 2 can be fixed by penetrating bolts into the mounting holes, and the clamp body 2 is fixed on a drilling machine by means of the tail handle 201, so that the drill bit body 1 and the drilling machine are connected.

In addition, the invention also provides a clamping and fixing method of the quick clamping type drill bit assembly, which comprises the following steps:

step one, pre-loosening, checking whether the locking sleeve 217 is screwed to the tail end of the clamp body 2, and ensuring that no overlapping area exists between the locking sleeve 217 and the lateral edge groove 219 so as to ensure that the internal thread on the inner wall of the locking sleeve 217 is completely separated from the external thread on the outer wall of the lateral edge convex block 218;

step two, clamping, namely, enabling the wedge convex 101 on the drill shank to be approximately aligned with the lateral edge groove 219 or the lateral edge convex block 218, and pushing the drill shank of the drill bit body 1 to be installed into the clamp body 2 through the opening of the clamp body 2; during the clamping process, the clamping block 202 continuously slides outwards from the through hole 208, and when the clamping block 202 is quickly folded after sliding outwards for a certain distance and is accompanied by a click sound, the straight surface on the wedge convex 101 is attached to the straight surface on the clamping block 202, namely, the drill shank is completely clamped with the axial restraint mechanism; stopping pushing the bit body 1 and loosening the bit body 1, at this time, driving the reverse inclined surface to be completely attached to the shank end inclined surface 102 under the action of the elastic force of the attaching spring 216;

step three, fastening and loosening prevention, and rotating the locking sleeve 217 to enable the internal threads on the inner wall of the locking sleeve 217 to be combined with the external threads on the outer wall of the lateral edge convex block 218; ensuring that the thread combination length of the locking sleeve 217 and the lateral edge lug 218 is equal to the thread combination length of the outer wall of the clamp body 2;

step four, checking, namely pushing and pulling the drill bit body 1 forward and backward along the axial direction of the drill bit body 1, and checking the axial clearance between the drill bit body 1 and the clamp body 2; checking whether the bit body 1 and the clamp body 2 can rotate relatively; if the axial clearance between the drill bit body 1 and the clamp body 2 is large, the drill bit body 1 needs to be disassembled, whether the clamping exists between the insert rod 215 and the insert channel 214 is checked, and the clamping is carried out again after the clamping is eliminated; if there is a rotation clearance between the bit body 1 and the clamp body 2, the locking sleeve 217 is screwed back to the end of the clamp body 2 again, the bit body 1 is rotated by a small extent, and then the circumferential position of the bit body 1 relative to the clamp body 2 is automatically corrected by the elasticity of the close spring 216; if the tightening spring 216 cannot automatically correct the circumferential position of the bit body 1 relative to the holder 2, the bit body 1 needs to be removed to check whether a jam exists between the insert rod 215 and the insert channel 214.

The above-described embodiments are illustrative, not restrictive, and the technical solutions that can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention are included in the present invention.

Claims (9)

1. The quick clamping type drill bit assembly comprises a drill bit body (1) and a clamp body (2), wherein one section of the drill bit body (1) matched with the clamp body (2) is a drill handle;

the method is characterized in that:

an axial restraint mechanism and a radial restraint mechanism are arranged between the drill shank and the clamp body (2);

after the drill shank is completely clamped with the axial constraint mechanism, the radial constraint structure is locked through a threaded fastening structure arranged outside the clamp body (2), so that no movement is generated between the drill bit body (1) and the clamp body (2);

the radial constraint mechanism is elastically attached to the drill shank when the drill shank is completely clamped with the axial constraint mechanism.

2. The quick-action drill bit assembly of claim 1, wherein the axial restraint mechanism is comprised of components and structures including a latch block (202), a wedge (101), and a resilient structure;

the wedge-shaped protrusions (101) are arranged on the surface of the drill shank along the circumferential direction, and the clamping blocks (202) are arranged at one end of the clamp body (2) with an opening; the clamping blocks (202) are distributed along the circumferential direction of the clamp body (2) and are movably arranged on the clamp body (2) along the radial direction of the clamp body (2) through an elastic structure;

the wedge-shaped convex part (101) is provided with a wedge surface on one surface facing the clamp body (2), and the back surface of the wedge surface is provided with a straight surface; the surface of the clamping block (202) facing the drill bit body (1) is an anti-wedge surface, and the back surface of the anti-wedge surface is also a straight surface.

3. The quick-clamping drill bit assembly according to claim 2, wherein a through hole (208) for the clamping block (202) to move along the radial direction of the clamping body (2) and penetrate through the clamping body (2) is formed in the outer wall of the clamping body (2), a concave channel (207) is formed in the side edge of the through hole (208), and a side edge (203) in sliding fit with the concave channel (207) is formed in the side wall of the clamping block (202).

4. The quick-release drill bit assembly according to claim 2, wherein the elastic structure comprises a penetrating rod (204) arranged along the length direction of the clamping block (202) and fixed with the clamping block (202), an L-shaped frame body (206) fixed on the outer wall of the clamping body (2), and a clamping spring (205) elastically connecting the L-shaped frame body (206) and the clamping block (202);

the upper part of the L-shaped frame body (206) is provided with a through hole, the penetrating rod (204) penetrates through the through hole and is in sliding fit with the through hole, one end of the clamping spring (205) is attached to the clamping block (202), and the other end of the clamping spring is attached to the L-shaped frame body (206).

5. A quick-action drill bit assembly according to claim 2, characterized in that a swivel (211) is rotatably arranged on the outer wall of the holder body (2), and the outer edge of the swivel (211) is provided with a clamping column (210) parallel to the axis of the holder body (2); a chute (209) is formed in one surface of the clamping block (202) facing the rotating sleeve (211), and the clamping column (210) is in sliding fit in the chute (209);

a circle of thrust steps (212) are further integrally arranged on the outer wall of the clamp body (2), and the rotating sleeve (211) is arranged between the thrust steps (212) and the clamping blocks (202).

6. The quick-action drill bit assembly according to claim 2, wherein the radial constraint mechanism comprises a plurality of insert rods (215) arranged in the clamp body (2) and uniformly distributed along the circumferential direction of the clamp body (2), a plurality of telescopic blocks (213) movably arranged in the clamp body (2), and a tightening spring (216) elastically connecting the telescopic blocks (213) and the insert rods (215);

the inserting rod (215) is parallel to the axis of the clamp body (2), an inserting channel (214) is arranged on the telescopic block (213), and the inserting rod (215) is in sliding insertion with the inserting channel (214); the close-fitting spring (216) is positioned in the insertion channel (214), one end of the close-fitting spring (216) is abutted against the bottom of the insertion channel (214), and the other end of the close-fitting spring is attached to the insertion rod (215);

the end part of the drill shank is provided with a shank end inclined plane (102), and one surface of the telescopic block (213) facing the drill shank is an inverse inclined plane.

7. The quick-action drill bit assembly of claim 6, wherein the threaded fastening structure comprises a skirt tab (218) disposed outside the telescopic block (213), wherein the clamp body (2) is provided with a skirt groove (219) parallel to the axial direction thereof, and wherein the skirt tab (218) slides in the skirt groove (219);

an external thread is arranged on a section of the outer wall of the clamp body (2) far away from the opening, and the external thread is matched with an internal thread on the inner wall of the locking sleeve (217); the outer wall of the lateral edge lug (218) is also provided with external threads and is matched with the internal threads of the inner wall of the locking sleeve (217).

8. The quick-clamping drill bit assembly according to claim 1, wherein a tail shank (201) is detachably mounted at one end, far away from the drill bit body (1), of the clamp body (2), a plurality of mounting holes are formed in the periphery of one end, close to the clamp body (2), of the tail shank (201), and the tail shank (201) is fixed with the clamp body (2) through penetrating bolts in the mounting holes.

9. A method of fastening a quick-action drill bit assembly according to any one of claims 1-8, comprising the steps of:

step one, pre-loosening, checking whether the locking sleeve is screwed to the tail end of the clamp body, and ensuring that no overlapping area exists between the locking sleeve and the side edge groove;

step two, clamping, namely enabling the wedge protrusions on the drill shank to be approximately aligned with the lateral edge grooves or the lateral edge convex blocks, and pushing the drill shank of the drill bit body to be installed into the clamp body through the opening of the clamp body; in the clamping process, the clamping block continuously slides outwards from the through hole, and when the clamping block slides outwards for a certain distance and then is quickly folded, the drill bit body is stopped being pushed and loosened;

fastening and loosening prevention, and rotating the locking sleeve to enable the internal threads on the inner wall of the locking sleeve to be combined with the external threads on the outer wall of the lateral edge lug; the screw thread combination length of the locking sleeve and the lateral edge convex blocks is ensured to be equivalent to the screw thread combination length of the outer wall of the clamp body;

step four, checking, namely pushing and pulling the drill bit body positively and negatively along the axial direction of the drill bit body, and checking the axial clearance between the drill bit body and the clamp body; and checking whether the drill bit body and the clamp body can rotate relatively.

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