CN115740581B - Drill chuck suitable for straight shank drill bit and use method thereof - Google Patents
Drill chuck suitable for straight shank drill bit and use method thereof Download PDFInfo
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- CN115740581B CN115740581B CN202211460655.8A CN202211460655A CN115740581B CN 115740581 B CN115740581 B CN 115740581B CN 202211460655 A CN202211460655 A CN 202211460655A CN 115740581 B CN115740581 B CN 115740581B
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- 230000005540 biological transmission Effects 0.000 claims description 20
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 244000309464 bull Species 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a drill clamping technology, in particular to a drill chuck suitable for a straight shank drill and a use method thereof, wherein a plurality of clamping parts are uniformly distributed along the circumference and mutually gathered to form a cone shape; the center of the inside of the shell is provided with a plug which is in sliding fit with the inner wall of the clamping part, the lower part of the plug is provided with a conical surface, and the taper of the conical surface is the same as the taper angle of a cone formed by mutually gathering a plurality of clamping parts; and a final tightening mechanism integrated with the drill chuck is further arranged between the clamping part and the shell and is used for driving the clamping part to rotate relative to the shell after the clamping part is pre-tightened with the drill shank so as to further gather the clamping part. The original lengthened moment arm, bevel gear and bevel gear ring are replaced by the arranged final tightening mechanism, and the final tightening mechanism is integrally arranged on the drill clamp; compared with a lengthened force arm which is arranged in a split mode, the portable type electric bicycle is convenient to carry and has better use flexibility.
Description
Technical Field
The invention relates to a drill clamping technology, in particular to a drill chuck suitable for a straight shank drill and a use method thereof.
Background
The drill chuck is a tool suitable for clamping a straight shank drill bit, and the shank part of the drill chuck is a conical surface and can be matched and installed with an inner hole of a drilling machine spindle; the head is generally provided with three jaws which can be opened or closed simultaneously by rotation of a tightening wrench.
The drill chuck can be divided into two main categories, namely spanner type and hand-tightening type, and the principle of the drill chuck is the same as that of the drill chuck; the three clamping claws are encircled to form a cone, the outer surface of the cone is provided with conical threads, and the inner wall of the drill sleeve is provided with conical internal threads; meanwhile, a rotatable lantern ring is arranged at the lower part of the drill bushing, an inclined guide part is arranged on the inner wall of the lantern ring, and the inclination direction of the guide part is the same as the cone angle of the conical body; when the drill sleeve is rotated to keep the collar from rotating, the three clamping claws are restrained from rotating through the guide parts; when the drill sleeve rotates, the conical internal threads on the inner wall of the drill sleeve are matched with the conical external threads on the outer surfaces of the clamping jaws, so that the three clamping jaws are driven to extend out of the lantern ring and draw close to each other to clamp the drill bit; conversely, when the drill sleeve is rotated in the opposite direction, the three jaws extend into the collar and separate from one another to loosen the drill bit.
In the process of clamping the drill bit, one hand holds the lantern ring, the other hand holds the drill sleeve, and the clamping jaw can extend out to clamp or shrink to separate by rotating one of the clamping jaws; after the drill bit is pre-tightened through the matched rotation of the lantern ring and the drill sleeve, the three-leg claw type drill chuck commonly used at present usually needs to be screwed up through a spanner wheel in order to ensure the stability of the clamping of the drill bit due to the large reaction force applied to the drill bit during the operation; the spanner wheel is a bevel gear with an lengthened arm of force, a circle of bevel gear is arranged at the edge of the drill sleeve, and a positioning hole is formed in the lantern ring; inserting the lengthened force arm into the positioning hole to enable the bevel gear on the lengthened force arm to be meshed with the bevel gear ring at the edge of the drill bushing, and further screwing the chuck by rotating the lengthened force arm. The lengthened force arm can be used for increasing the torque input, so that the clamping force of the clamping head is high; similarly, when the drill bit needs to be disassembled, the clamping force is large, if the collar and the drill sleeve are directly held by hands to drive the collar and the drill sleeve to rotate relatively, the difficulty is high, and the collar and the drill sleeve can be easily driven to rotate relatively by lengthening the force arm, so that the clamped drill bit is disassembled.
Although the final tightening effect can be achieved by the cooperation of the bevel gear on the lengthened arm of force and the bevel gear ring at the edge of the drill bushing, the lengthened arm of force and the bevel gear on the lengthened arm of force are required to be carried about and are not connected with the drill chuck into a whole; therefore, the lengthened force arm needs to be carried about when the drill bit is clamped, after the drill bit is clamped, the problem that the normal work of the drill bit is influenced by the fact that the lengthened force arm rotates at a high speed when the drill bit and the drill chuck work is avoided, the lengthened force arm is separated from the drill chuck at a high speed under the action of centrifugal force, and the lengthened force arm needs to be detached from the drill chuck is avoided.
Disclosure of Invention
The present invention is directed to a drill chuck with a straight shank bit and a method of using the same, which solve the above-mentioned problems.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a drill chuck suitable for straight shank drill bit comprises a shell, a rotary head in rotary fit with the shell, and a clamping part movably connected with the rotary head; the clamping parts are uniformly distributed along the circumference, and the clamping parts are mutually gathered to form a cone shape;
the center of the inside of the shell is provided with a plug which is in sliding fit with the inner wall of the clamping part, the lower part of the plug is provided with a conical surface, and the taper of the conical surface is the same as the taper angle of a cone formed by mutually gathering a plurality of clamping parts;
and a final tightening mechanism integrated with the drill chuck is further arranged between the clamping part and the shell, and the final tightening mechanism is used for driving the clamping part to rotate relative to the shell after the clamping part and the drill shank are pre-tightened so as to further gather the clamping part.
A drill chuck for use with a straight shank drill bit as described above: a sliding clamping groove is formed in the outer wall of the clamping part, and a guide protrusion which is in sliding fit with the sliding clamping groove is integrally formed in the inner wall of the rotating head;
the outer wall of the upper part of the rotating head is provided with a circle of roller path with a semicircular section, the inner wall of the lower part of the shell is provided with a circle of roller path with a semicircular section, and the diameters of the two circles of roller paths are the same; a ball is arranged between the two rings of rollaway nest;
the inner wall of the lower part of the shell is also integrally provided with an inner convex step, and a conical internal thread is arranged on the inner convex step; the outer wall of the clamping part is provided with a conical external thread which is matched with the internal thread on the inward convex ladder.
A drill chuck for use with a straight shank drill bit as described above: the upper part of the top head is integrally provided with a second central rod, the upper part of the second central rod is coaxially provided with a first central rod, the first central rod penetrates out of the penetrating opening at the top of the shell, and the first central rod is fixed with the penetrating opening at the top of the shell through the end cover;
the bottom of the first central rod and the top of the second central rod are provided with a gap, the lower part of the first central rod and the upper part of the second central rod are coaxially connected through an arc-shaped connecting hoop, and the first central rod and the second central rod form a central rod group.
A drill chuck for use with a straight shank drill bit as described above: the inner centers of the first central rod and the second central rod are respectively provided with a recessed channel, wherein the recessed channels in the first central rod penetrate through the top head, and the upper parts of the recessed channels in the second central rod are provided with a circle of flanges;
the final tightening mechanism comprises an internal shaft in running fit with the embedded channel, the internal shaft penetrates through the second central rod and the plug, a circle of concave channel is arranged on the outer wall of a section of the internal shaft extending into the first central rod, and the concave channel is in running clamping with the flange;
the lower part of the built-in shaft is connected with a cone ring, and the cone ring is matched with the clamping part; the final tightening mechanism further comprises a labor-saving assembly used for driving the built-in shaft to rotate.
A drill chuck for use with a straight shank drill bit as described above: a key groove is formed in the center of the conical ring, a sliding key is integrally arranged on the outer wall of the lower part of the built-in shaft, and the sliding key is in sliding fit with the key groove; so that the sliding key can be driven to rotate along with the rotation of the built-in shaft, and the taper ring can synchronously rotate.
The outer wall of the conical ring is provided with a fin plate, the inner wall of the clamping part is provided with a slot, and the fin plate is in sliding fit with the slot.
A drill chuck for use with a straight shank drill bit as described above: the labor-saving assembly comprises a final tightening gear arranged at the gap, the final tightening gear and the built-in shaft are coaxially fixed, two sides of the final tightening gear are respectively provided with a group of thread transmission structures, the two groups of thread transmission structures are mutually connected, and the thread transmission structures are matched with the final tightening gear;
four connecting rods are arranged on the circumference of the final tightening gear, the four connecting rods are fixed with the built-in shaft, and the final tightening gear is coaxially sleeved on the periphery of the built-in shaft.
A drill chuck for use with a straight shank drill bit as described above: the screw thread transmission structure comprises a screw rod rotatably arranged in the shell, a straight tooth column in threaded connection with the screw rod, and a sliding sheet arranged on the inner wall of the shell;
the sliding vane is in sliding fit with a sliding groove formed in the outer wall of the straight tooth column, one section of tooth is arranged on one face, facing the final tightening gear, of the straight tooth column, and the tooth is matched with the final tightening gear.
A drill chuck for use with a straight shank drill bit as described above: the screw rod is provided with a pinion which is meshed with the bull gear, the bull gear is arranged on the rotating shaft, one end of the rotating shaft is rotatably arranged on one of the connecting hoops, and the other end of the rotating shaft penetrates out of the shell and is in rotary fit with the shell; one end of the rotating shaft, which penetrates out of the shell, is provided with a knob.
A method of using a drill chuck as described above, comprising the steps of:
step one, adjusting a clamping part, holding a shell by one hand to keep the shell fixed, holding a rotating head by the other hand, and rotating the rotating head to enable the clamping part to be completely contracted and separated to the maximum extent;
step two, inserting the drill shank, namely putting the straight shank of the drill bit into the rotary head, holding the shell by one hand after putting the drill shank into the shell to keep the shell fixed, holding the rotary head by the other hand, reversely rotating the rotary head to enable the clamping parts to extend out of the rotary head and gather together, and clamping the drill shank until the rotary head cannot be rotated;
step three, the drill handle is finally tightened, the shell is held by hand, the knob is rotated, the gear set and the thread transmission structure are driven to act through the knob, and the drill handle is completely fixed; attempting to pull the drill bit, and detecting whether the drill bit is forcefully fixed by the clamping part;
step four, the handle is disassembled, the knob is reversely rotated, and the clamping part is driven to slightly move relative to the shell until the knob cannot rotate at all (the straight tooth column reaches the pinion and is separated from the final tightening gear); and then reversely rotating the rotary head and the shell to drive the clamping part to further retract into the rotary head and separate from each other.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the original lengthened moment arm, bevel gear and bevel gear ring are replaced by the arranged final tightening mechanism, and the final tightening mechanism is integrally arranged on the drill chuck; compared with a lengthened force arm which is arranged in a split mode, the portable type electric bicycle is convenient to carry and has better use flexibility.
Drawings
FIG. 1 is a schematic view of a drill chuck for use with a straight shank drill bit;
FIG. 2 is a schematic view of a drill chuck for use with a straight shank drill;
FIG. 3 is a top view of a drill chuck for use with a straight shank drill bit;
FIG. 4 is a cross-sectional view taken along the direction A-A of FIG. 3;
FIG. 5 is a three-dimensional perspective view of FIG. 4;
FIG. 6 is a schematic view of the structure of the three clamping portions after complete gathering;
FIG. 7 is a schematic view of the structure of the rotator head and guide protrusions therein;
FIG. 8 is a schematic view of the structure of the housing after half-section;
FIG. 9 is an elevation view of the center pole set and final drive gear;
FIG. 10 is a block diagram of the final tightening mechanism with only one clamping portion remaining;
FIG. 11 is a schematic view of the structure of FIG. 10 in another orientation after removal of the clamping portion and end cap;
FIG. 12 is a schematic view of the structure of FIG. 11 with the center pole set removed and the view oriented;
fig. 13 is a schematic view of the structure with the built-in shaft and cone ring separated.
In the figure: 1-a housing; 2-a rotating head; 3-number one center rod; 4-clamping part; 5-second center rod; 6-connecting hoops; 7-inward convex steps; 8-a plug; 9-guiding protrusions; 10-a sliding clamping groove; 11-balls; 12-conical surface; 13-a final tightening wheel; 14-rotating shaft; 15-a large gear; 16-pinion; 17-screw rod; 18-straight tooth columns; 19-sliding grooves; 20-sliding sheets; 21-final gear; 22-built-in shaft; 23-cone ring; 24-keyway; 25-slide bond; 26-fin plates; 27-a slot; 28-end cap.
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 drill chuck for a straight shank drill bit includes a housing 1, a rotary head 2 rotatably engaged with the housing 1, and a clamping portion 4 movably connected to the rotary head 2; the clamping parts 4 are multiple and uniformly distributed along the circumference, and the clamping parts 4 are mutually gathered to form a cone shape.
When the clamping parts 4 are gathered together, the drill shank of the drill bit can be clamped and fixed, so that the drill bit is stably arranged on the drill clamping head; when the plurality of clamping portions 4 are separated in the radial direction of the cone, the clamped drill bit shank can be loosened, thereby removing the drill bit or replacing the drill bit.
The center of the inside of the shell 1 is provided with a plug 8 which is used for being in sliding fit with the inner wall of the clamping part 4, the lower part of the plug 8 is provided with a conical surface 12, and the taper of the conical surface 12 is the same as the taper angle of a cone formed by mutually gathering a plurality of clamping parts 4.
Since the taper angle of the taper surface 12 at the lower part of the plug 8 is the same as the taper angle of the inner wall at the upper part of the clamping part 4, when the clamping part 4 is separated along the radial direction of the taper, the clamping part also contracts into the rotary head 2 under the action of the taper surface 12; in this way, when the clamping parts 4 are gathered together, the clamping parts extend out of the rotary head 2; and is retracted into the spin head 2 when the plurality of grip portions 4 are separated from each other.
And a tightening mechanism integrated with the drill chuck is further arranged between the clamping part 4 and the shell 1, and is used for driving the clamping part 4 to rotate relative to the shell 1 after the clamping part 4 and the drill shank are pre-tightened, so that the clamping part 4 is further gathered, and the pre-tightened drill shank is subjected to tightening treatment.
According to the invention, the original lengthened moment arm, bevel gear and bevel gear ring are replaced by the arranged final tightening mechanism, and the final tightening mechanism is integrally arranged on the drill chuck; compared with a lengthened force arm which is arranged in a split mode, the portable type electric bicycle is convenient to carry and has better use flexibility.
As a further scheme of the invention, a sliding clamping groove 10 is formed on the outer wall of the clamping part 4, and a guiding protrusion 9 which is in sliding fit with the sliding clamping groove 10 is integrally formed on the inner wall of the rotating head 2.
The guide protrusion 9 is matched with the sliding clamping groove 10, so that the clamping part 4 and the inner wall of the rotating head 2 can only slide relatively and cannot rotate relatively.
The outer wall of the upper part of the rotating head 2 is provided with a circle of roller path with a semicircular section, the inner wall of the lower part of the shell 1 is provided with a circle of roller path with a semicircular section, and the diameters of the two circles of roller paths are the same; between the two raceways balls 11 are arranged.
The ball 11 and the two rings of roller paths are matched to realize the running fit of the rotary head 2 and the shell 1, so that on one hand, dislocation of the rotary head and the shell in the axial direction can be effectively avoided, and on the other hand, the rotating friction force between the rotary head and the shell can be reduced, thereby reducing abrasion of a rotating joint and prolonging the service life of the whole drill chuck.
The inner wall of the lower part of the shell 1 is also integrally provided with an inner convex step 7, and the inner convex step 7 is provided with conical internal threads; the outer wall of the clamping part 4 is provided with conical external threads which are matched with the internal threads on the inward convex steps 7;
when the drill shank is pre-tightened, the rotary head 2 is held by one hand, the shell 1 is held by the other hand and is rotated relatively, the clamping parts 4 can be driven by the interaction of the conical external threads and the conical internal threads, the clamping parts are mutually gathered or separated in the guiding direction of the conical surface 12 at the lower part of the plug 8, and the clamping parts are stretched out from the rotary head 2 or contracted into the rotary head 2 while gathering and separating.
As a further scheme of the invention, the upper part of the plug 8 is integrally provided with a second central rod 5, the upper part of the second central rod 5 is coaxially provided with a first central rod 3, the first central rod 3 penetrates out of the penetrating opening at the top of the shell 1, and the first central rod 3 is fixed with the penetrating opening at the top of the shell 1 through an end cover 28;
specifically, the end cover 28 is fixed with the first central rod 3 through a set of bolts, and the shell 1 is fixed with the end cover 28 through another set of bolts; wherein the diameter of the through opening is larger than the diameter of the plug 8, so as to facilitate the insertion of the central rod and plug 8 into the housing 1 through the through opening or the removal from the housing 1.
A gap is formed between the bottom of the first central rod 3 and the top of the second central rod 5, the lower part of the first central rod 3 and the upper part of the second central rod 5 are coaxially connected through an arc-shaped connecting hoop 6, and the first central rod 3 and the second central rod 5 form a central rod group.
The coaxial fixation of the center rod group and the shell 1 can be easily realized through the arranged end cover 28, and the center rod group and the plug 8 are conveniently detached from the shell 1, so that the disassembly is more convenient compared with the traditional drill chuck which needs to use hammer hammering to forcedly drive clamping jaw separation of clamping, whether maintenance or replacement is carried out.
As a still further scheme of the invention, the inner centers of the first central rod 3 and the second central rod 5 are respectively provided with a recessed channel, wherein the recessed channel in the first central rod 3 penetrates through the plug 8, and a circle of flange is arranged at the upper part of the recessed channel in the second central rod 5;
the final tightening mechanism comprises a built-in shaft 22 in running fit with the embedding channel, the built-in shaft 22 penetrates through the second central rod 5 and the plug 8, a circle of concave channel is arranged on one section of outer wall of the built-in shaft 22 extending into the first central rod 3, and the concave channel is in running clamping with the flange;
a conical ring 23 is connected to the lower part of the built-in shaft 22, and the conical ring 23 is matched with the clamping part 4; the final tightening mechanism also includes a labor-saving assembly for driving the rotation of the built-in shaft 22.
The labor-saving assembly can drive the built-in shaft 22 to rotate, the built-in shaft 22 drives the taper ring 23 to rotate, and then the clamping part 4 is driven to rotate relative to the shell 1, when the clamping part 4 rotates relative to the shell 1, the plurality of clamping parts 4 are driven by the interaction of the taper external threads and the taper internal threads, the clamping parts are gathered or separated with each other under the guiding action of the taper surface 12 at the lower part of the plug 8, and the clamping parts are stretched out or contracted into the rotating head 2 from the rotating head 2 while gathering and separating.
As a still further scheme of the invention, a key slot 24 is arranged in the center of the conical ring 23, a sliding key 25 is integrally arranged on the outer wall of the lower part of the built-in shaft 22, and the sliding key 25 is in sliding fit with the key slot 24; so that the built-in shaft 22 can drive the sliding key 25 to rotate along with the rotation, and the cone ring 23 rotates synchronously.
The outer wall of the cone ring 23 is provided with a fin plate 26, the inner wall of the clamping part 4 is provided with a slot 27, and the fin plate 26 is in sliding fit with the slot 27.
When the cone ring 23 rotates, the fin plate 26 is matched with the slot 27, so that the clamping part 4 is driven to rotate; when the clamping part 4 rotates, the clamping part moves along the radial direction of the built-in shaft 22 and moves along the axial direction of the built-in shaft 22; because the fin 26 is in sliding engagement with the slot 27 in the radial direction, and the keyway 24 is in sliding engagement with the sliding key 25 in the axial direction; therefore, when the clamping part 4 gathers together or separates, the clamping part 4 and the cone ring 23 can be kept to rotate together by the cooperation of the fin plates 26 and the slots 27; the taper ring 23 and the built-in shaft 22 can be kept to rotate together by matching the sliding key 25 with the key groove 24.
As a still further scheme of the invention, the labor-saving assembly comprises a final tightening gear 21 arranged at the gap, the final tightening gear 21 and the built-in shaft 22 are coaxially fixed, two sides of the final tightening gear 21 are respectively provided with a group of thread transmission structures, the two groups of thread transmission structures are mutually connected, and the thread transmission structures are matched with the final tightening gear 21;
four connecting rods are circumferentially arranged on the final tightening gear 21, the four connecting rods are fixed with the built-in shaft 22, and the final tightening gear 21 is coaxially sleeved on the periphery of the built-in shaft 22.
The final tightening gear 21 is driven to rotate through the action of the thread transmission structure, and the final tightening gear 21 drives the built-in shaft 22 to rotate by utilizing four connecting rods in the circumferential direction of the final tightening gear, and finally drives the sliding key 25 to rotate.
Due to the arrangement of the thread transmission structure, the thread transmission has the effects of saving labor and self-locking, so that the thread transmission structure drives the final tightening gear 21 to rotate, thereby saving labor, namely saving labor as the same effect as the lengthened moment arm in the prior art; in addition, by utilizing the characteristic of thread transmission self-locking, the final tightening gear 21 cannot rotate, and the drill bit after final tightening is ensured not to be loosened due to the rotation of the final tightening gear 21.
As a still further aspect of the present invention, the screw transmission structure includes a screw rod 17 rotatably disposed in the housing 1, a straight tooth post 18 screwed with the screw rod 17, and a sliding piece 20 disposed on an inner wall of the housing 1;
the sliding sheet 20 is in sliding fit with a sliding groove 19 formed in the outer wall of the straight-tooth column 18, one side of the straight-tooth column 18, facing towards the final tightening gear 21, is provided with a section of teeth, and the teeth are matched with the final tightening gear 21;
it should be noted that the screw threads 17 in the two sets of screw threads are threaded in opposite directions, and the straight-toothed columns 18 on the two sets of screw threads 17 are offset from each other.
When the drill bit is tightly pressed, the two screw rods 17 are driven to rotate in the same direction, and the two straight tooth columns 18 move reversely because the rotation directions of the two screw rods 17 are opposite; when the teeth on the spur 18 move to engage with the final gear 21, the two spur 18 apply a force to the final gear 21 together and drive the final gear 21 to rotate.
When the drill bit is detached from the clamping part 4, the clamping force between the clamping part 4 and the drill handle of the drill bit is extremely large in the initial state, if the rotary head 2 and the shell 1 are directly held by hands, the rotary head cannot rotate; at the moment, the two straight-tooth columns 18 can be driven to be far away from each other by rotating the two screw rods 17 so as to drive the final tightening gear 21 to rotate, and after the teeth on the straight-tooth columns 18 are separated from the final tightening gear 21, the clamping force between the clamping part 4 and the drill shank is reduced, so that a pre-loosening effect is achieved; then the rotary head 2 and the shell 1 are held by hands to rotate relatively, so as to achieve final relaxation.
As a still further scheme of the invention, a pinion 16 is arranged on the screw rod 17, the pinion 16 is meshed with a large gear 15, the large gear 15 is arranged on a rotating shaft 14, one end of the rotating shaft 14 is rotatably arranged on one of the connecting hoops 6, and the other end of the rotating shaft 14 penetrates out of the shell 1 and is in rotary fit with the shell 1; a knob is arranged at one end of the rotating shaft 14 penetrating out of the shell 1.
The rotary shaft 14 is driven to rotate through the rotary knob, the large gear 15 is driven to rotate, the large gear 15 drives the small gears 16 on two sides to rotate in the same direction and at the same speed, and finally the screw rods 17 on two sides rotate in the same direction at the same speed.
In addition, the invention also provides a using method of the drill chuck, which comprises the following steps:
step one, the clamping part 4 is adjusted, the shell 1 is held by one hand to keep the shell 1 fixed, the rotating head 2 is held by the other hand, and the rotating head 2 is rotated to enable the clamping part 4 to be completely contracted and separated to the maximum extent;
step two, putting the straight shank of the drill bit into the rotary head 2, holding the shell 1 by one hand to keep the shell 1 fixed after putting the drill bit into the rotary head, holding the rotary head 2 by the other hand, reversely rotating the rotary head 2 to enable the clamping parts 4 to extend out of the rotary head 2 and gather with each other, and clamping the drill bit until the rotary head 2 cannot be rotated;
step three, the drill shank is finally tightened, the shell 1 is held by hand, the knob is rotated, the gear set and the thread transmission structure are driven to act through the knob, and the drill shank is completely fixed; attempting to pull the drill bit, detecting whether the drill bit is forcefully fixed by the clamping part 4;
step four, the handle is disassembled, the knob is reversely rotated, and the clamping part 4 is driven to slightly move relative to the shell 1 until the knob cannot rotate at all (the straight tooth column 18 reaches the position of the pinion 16 and is separated from the final tightening gear 21); the rotator head 2 and the housing 1 are then rotated in opposite directions, forcing the clamping part 4 to retract further into the rotator head 2 and to separate from each other.
Note that, since the spur 18 is combined with the final gear 21, the final gear 21 can be driven to rotate at a very small angle. The reason why the plurality of grip portions 4 are not directly driven to act by turning the knob is that:
the straight tooth column 18 is driven to move by the screw rod 17 at a very low speed, so that if the clamping part 4 needs to be opened or closed greatly, the clamping of the drill shank can be realized only by rotating for a plurality of circles, and the drill cannot be clamped quickly.
The conical external threads and the conical internal threads are adopted to interact to drive the clamping parts 4, and under the guiding action of the conical surface 12 at the lower part of the plug 8, the clamping parts are mutually gathered or separated to have the function of rapid pre-clamping.
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 (2)
1. A drill chuck suitable for a straight shank drill bit comprises a shell (1), a rotary head (2) in rotary fit with the shell (1), and a clamping part (4) movably connected with the rotary head (2); the clamping parts (4) are uniformly distributed along the circumference, and the clamping parts (4) are mutually gathered to form a cone shape;
a plug (8) which is used for being in sliding fit with the inner wall of the clamping part (4) is arranged in the center of the inside of the shell (1), a conical surface (12) is arranged at the lower part of the plug (8), and the taper of the conical surface (12) is the same as the taper angle of a cone formed by mutually gathering the plurality of clamping parts (4);
the method is characterized in that:
a tightening mechanism integrated with the drill chuck is further arranged between the clamping part (4) and the shell (1), and the tightening mechanism is used for driving the clamping part (4) to rotate relative to the shell (1) after the clamping part (4) and the drill shank are pre-tightened so as to further gather the clamping part (4);
a sliding clamping groove (10) is formed in the outer wall of the clamping part (4), and a guide protrusion (9) which is in sliding fit with the sliding clamping groove (10) is integrally formed in the inner wall of the rotating head (2);
the outer wall of the upper part of the rotating head (2) is provided with a circle of roller path with a semicircular section, the inner wall of the lower part of the shell (1) is provided with a circle of roller path with a semicircular section, and the diameters of the two circles of roller paths are the same; a ball (11) is arranged between the two rings of rollaway nest;
the inner wall of the lower part of the shell (1) is also integrally provided with an inner convex step (7), and the inner convex step (7) is provided with a conical internal thread; the outer wall of the clamping part (4) is provided with conical external threads which are matched with the internal threads on the inner convex steps (7);
the upper part of the plug (8) is integrally provided with a second central rod (5), the upper part of the second central rod (5) is coaxially provided with a first central rod (3), the first central rod (3) penetrates out of a penetrating opening at the top of the shell (1), and the first central rod (3) is fixed with the penetrating opening at the top of the shell (1) through an end cover (28);
a gap is formed between the bottom of the first central rod (3) and the top of the second central rod (5), the lower part of the first central rod (3) is coaxially connected with the upper part of the second central rod (5) through an arc-shaped connecting hoop (6), and the first central rod (3) and the second central rod (5) form a central rod group;
the inner centers of the first central rod (3) and the second central rod (5) are respectively provided with a recessed channel, wherein the recessed channels in the first central rod (3) penetrate through the top head (8), and a circle of flange is arranged at the upper part of the recessed channels in the second central rod (5);
the final tightening mechanism comprises an embedded shaft (22) which is in running fit with the embedding channel, the embedded shaft (22) penetrates through the second central rod (5) and the plug (8), a circle of concave channel is formed in the outer wall of a section of the embedded shaft (22) which stretches into the first central rod (3), and the concave channel is in rotating clamping with the flange;
the lower part of the built-in shaft (22) is connected with a cone ring (23), and the cone ring (23) is matched with the clamping part (4); the final tightening mechanism further comprises a labor-saving assembly for driving the built-in shaft (22) to rotate;
a key groove (24) is formed in the center of the conical ring (23), a sliding key (25) is integrally arranged on the outer wall of the lower part of the built-in shaft (22), and the sliding key (25) is in sliding fit with the key groove (24); so that the sliding key (25) can be driven to rotate along with the rotation of the built-in shaft (22), and the cone ring (23) can synchronously rotate;
a fin plate (26) is arranged on the outer wall of the cone ring (23), a slot (27) is formed in the inner wall of the clamping part (4), and the fin plate (26) is in sliding fit with the slot (27);
the labor-saving assembly comprises a final tightening gear (21) arranged at the gap, the final tightening gear (21) and the built-in shaft (22) are coaxially fixed, two sides of the final tightening gear (21) are respectively provided with a group of thread transmission structures, the two groups of thread transmission structures are mutually connected, and the thread transmission structures are matched with the final tightening gear (21);
four connecting rods are circumferentially arranged on the final tightening gear (21), the four connecting rods are fixed with the built-in shaft (22), and the final tightening gear (21) is coaxially sleeved on the periphery of the built-in shaft (22);
the thread transmission structure comprises a screw rod (17) rotatably arranged in the shell (1), a straight tooth column (18) in threaded connection with the screw rod (17), and a sliding sheet (20) arranged on the inner wall of the shell (1);
the sliding sheet (20) is in sliding fit with a sliding groove (19) formed in the outer wall of the straight-tooth column (18), one side of the straight-tooth column (18) facing the final tightening gear (21) is provided with a section of tooth, and the tooth is matched with the final tightening gear (21);
the screw rod (17) is provided with a pinion (16), the pinion (16) is meshed with the large gear (15), the large gear (15) is arranged on the rotating shaft (14), one end of the rotating shaft (14) is rotatably arranged on one connecting hoop (6), and the other end of the rotating shaft penetrates out of the shell (1) and is in rotary fit with the shell (1); one end of the rotating shaft (14) penetrating out of the shell (1) is provided with a knob.
2. A method of using the drill chuck of claim 1, comprising the steps of:
step one, adjusting a clamping part, holding a shell by one hand to keep the shell fixed, holding a rotating head by the other hand, and rotating the rotating head to enable the clamping part to be completely contracted and separated to the maximum extent;
step two, inserting the drill shank, namely putting the straight shank of the drill bit into the rotary head, holding the shell by one hand after putting the drill shank into the shell to keep the shell fixed, holding the rotary head by the other hand, reversely rotating the rotary head to enable the clamping parts to extend out of the rotary head and gather together, and clamping the drill shank until the rotary head cannot be rotated;
step three, the drill handle is finally tightened, the shell is held by hand, the knob is rotated, the gear set and the thread transmission structure are driven to act through the knob, and the drill handle is completely fixed; attempting to pull the drill bit, and detecting whether the drill bit is forcefully fixed by the clamping part;
step four, the handle is disassembled, the knob is reversely rotated, and the clamping part is driven to slightly move relative to the shell until the knob cannot rotate at all; and then reversely rotating the rotary head and the shell to drive the clamping part to further retract into the rotary head and separate from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460655.8A CN115740581B (en) | 2022-11-17 | 2022-11-17 | Drill chuck suitable for straight shank drill bit and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460655.8A CN115740581B (en) | 2022-11-17 | 2022-11-17 | Drill chuck suitable for straight shank drill bit and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115740581A CN115740581A (en) | 2023-03-07 |
| CN115740581B true CN115740581B (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211460655.8A Active CN115740581B (en) | 2022-11-17 | 2022-11-17 | Drill chuck suitable for straight shank drill bit and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115740581B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1319517A (en) * | 1969-06-07 | 1973-06-06 | Bosch Gmbh Robert | Drill chucks |
| CN2723083Y (en) * | 2004-09-15 | 2005-09-07 | 山东威达机械股份有限公司 | Locking type hand-operated drill chuck |
| WO2010081394A1 (en) * | 2009-01-13 | 2010-07-22 | Yu Qingzi | Self-tightening drill chuck |
| CN103394734A (en) * | 2013-07-19 | 2013-11-20 | 威海达旺五金制品有限责任公司 | Self-fastening self-locking drill chuck |
| CN112428000A (en) * | 2020-11-30 | 2021-03-02 | 武义县达香电子有限公司 | Dustproof electric drill chuck capable of quickly clamping drill bit |
-
2022
- 2022-11-17 CN CN202211460655.8A patent/CN115740581B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1319517A (en) * | 1969-06-07 | 1973-06-06 | Bosch Gmbh Robert | Drill chucks |
| CN2723083Y (en) * | 2004-09-15 | 2005-09-07 | 山东威达机械股份有限公司 | Locking type hand-operated drill chuck |
| WO2010081394A1 (en) * | 2009-01-13 | 2010-07-22 | Yu Qingzi | Self-tightening drill chuck |
| CN103394734A (en) * | 2013-07-19 | 2013-11-20 | 威海达旺五金制品有限责任公司 | Self-fastening self-locking drill chuck |
| CN112428000A (en) * | 2020-11-30 | 2021-03-02 | 武义县达香电子有限公司 | Dustproof electric drill chuck capable of quickly clamping drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115740581A (en) | 2023-03-07 |
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