CN211415029U - Quick clamping device for electric hammer drill bit - Google Patents
Quick clamping device for electric hammer drill bit Download PDFInfo
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- CN211415029U CN211415029U CN201922309257.6U CN201922309257U CN211415029U CN 211415029 U CN211415029 U CN 211415029U CN 201922309257 U CN201922309257 U CN 201922309257U CN 211415029 U CN211415029 U CN 211415029U
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Abstract
The utility model discloses a quick clamping device of electric hammer drill bit, including front cover, cylinder block, clamping mechanism, the clamping mechanism include drill bushing, clamping collar, change cover, drill bit, correspond on the drill bushing and be equipped with first, second steel ball recess and cylindric lock constant head tank, the clamping collar cover is established on the drill bushing, install the elasticity clamping ring that pushes down the steel ball on the clamping ring draw-in groove, install the cylindric lock on the cylindric lock constant head tank, the outside and the involute groove cooperation of cylindric lock, the inboard and the clamping groove cooperation of drill bit; in the initial state, the steel cylindrical pin is in loose fit; when the drill bit is mounted and the replacing sleeve is rotated, the replacing sleeve drives the steel balls to slide from the second steel ball grooves to the first steel ball grooves through the clamping sleeve, and the cylindrical pin slides to the near end from the far end relative to the involute grooves of the clamping sleeve and pushes the cylindrical pin to be matched with the clamping groove to clamp the drill bit. After adopting this structure, have that structural design is reasonable, the centre gripping is reliable and stable, the durability is good, advantages such as product long service life.
Description
Technical Field
The utility model relates to a drill bit clamping technical field, especially a use quick installation and dismantle quick clamping device of electric hammer drill bit of drill bit with electric hammer is supporting.
Background
The electric hammer is driven by a transmission mechanism to rotate and to hammer the drill bit in a reciprocating mode, and meanwhile, the reciprocating hammering motion is driven by a crankshaft connecting rod piston in the vertical direction, air is compressed in a cylinder in a reciprocating mode, air pressure in the cylinder changes periodically, the changed air pressure drives a hammer in the cylinder to strike the drill bit in a reciprocating mode, and the electric hammer is mainly used for drilling holes in concrete, floor slabs, brick walls and stone materials. In the electric hammer use, need often change the drill bit of electric hammer, the clamping device that the steel ball makes the drill bit press from both sides tightly is driven through the spring to the clamp housing that drives in the existing market generally use, and this clamping device has following problem in the use: firstly, the steel ball is less with the tight area of contact of drill bit clamp, and the friction is comparatively serious, and at the drill bit change in-process, this patent has the steel ball wearing and tearing serious, causes the problem that the electric hammer drill bit can not firmly press from both sides tightly easily. Secondly, the steel ball is greatly abraded relative to the drill bushing, the drill bushing cannot position the steel ball and directly drops out of the positioning hole of the drill bushing, and the cylinder body is damaged and scrapped. Aiming at the problems, many manufacturers and acquaintances develop and develop the products, but no ideal products are seen.
Disclosure of Invention
For overcoming the above-mentioned defect that prior art exists, the utility model aims at providing a structural design is reasonable, operation convenient to use, centre gripping are reliable and stable, the durability is good, product long service life's quick clamping device of electric hammer drill bit.
The utility model solves the technical problems and adopts the technical proposal that the device comprises a front cover fixed on a machine body, a cylinder body which can rotate relative to the front cover, and a clamping mechanism, wherein the clamping mechanism comprises a drill bushing, a clamping bushing, a replacing bushing and a drill bit which are connected with the cylinder body into a whole, the drill bushing is correspondingly provided with a first steel ball groove, a second steel ball groove and a cylindrical pin positioning groove, the inner wall of the clamping bushing is provided with a gradual groove, the outer wall is provided with a clamping ring clamping groove and a steel ball hole arranged on the clamping ring clamping groove; the clamping sleeve is rotatably sleeved on the drill sleeve, steel balls matched with the first steel ball groove and the second steel ball groove are arranged on a steel ball hole of the clamping sleeve, an elastic clamping ring for pressing the steel balls is arranged on a clamping groove of the clamping ring, a movable cylindrical pin is arranged on a cylindrical pin positioning groove, the outer side of the cylindrical pin is matched with the involute groove, the inner side of the cylindrical pin is matched with a clamping groove of a drill bit, and the replacement sleeve is fixedly sleeved on the clamping sleeve; in the initial state, the steel ball is matched with the second steel ball groove, the cylindrical pin is matched with the far end of the gradually-grooved groove, and the cylindrical pin is in loose fit; when the drill bit is mounted and the replacing sleeve is rotated for a certain angle, the replacing sleeve drives the steel balls to slide from the second steel ball grooves to the first steel ball grooves through the clamping sleeve, and the cylindrical pin slides to the near end from the far end relative to the involute grooves of the clamping sleeve and pushes the cylindrical pin to be matched with the clamping groove to clamp the drill bit.
The utility model discloses a further scheme, the contained angle control of first steel ball recess and second steel ball recess is between 45 to 65 degrees.
The utility model discloses a further scheme, elasticity clamping ring have the opening, be equipped with at the opening part with clamping sleeve fixed connection's locating pin.
The utility model discloses a further scheme, the drill bushing on be equipped with protective sheath constant head tank and protective sheath draw-in groove, the protective sheath is fixed on the drill bushing through cooperating with protective sheath constant head tank and protective sheath draw-in groove.
The utility model discloses a further scheme, change the cover on be equipped with the faying face or combine the tooth, the clamping sleeve cup joints each other through cooperating with faying face or combination tooth.
The utility model discloses a further scheme, the change overlap on be equipped with the clamping arrow point, correspond on the protective sheath be equipped with clamping arrow point complex loosen mark and locking mark.
After adopting above-mentioned structure, compare with prior art and have following advantage and effect: firstly, the steel ball is matched with the second steel ball groove in the initial state, the cylindrical pin is matched with the far end of the gradually-grooved groove, and the cylindrical pin is in loose fit at the moment; when the drill bit is installed and the replacement sleeve is rotated for a certain angle, the replacement sleeve drives the steel balls to slide from the second steel ball grooves to the first steel ball grooves through the clamping sleeve, the cylindrical pin slides to the near end from the far end relative to the involute grooves of the clamping sleeve and pushes the cylindrical pin to be matched with the clamping grooves to clamp the drill bit, and the cylindrical pin and the clamping grooves of the drill bit can be guaranteed to be matched stably and reliably. And secondly, the elastic clamping ring can ensure that the steel ball is flexible in rotation and reliable in positioning, the steel ball cannot be separated from the steel ball hole of the clamping sleeve, and the positioning pin can prevent the elastic clamping ring from rotating and shifting.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic view of the exploded structure of the present invention.
Fig. 3 is a schematic view of the fitting structure of the present invention.
Fig. 4 is a schematic view of the cross-sectional structure a-a of fig. 3 when the drill bit is not installed in the present invention.
Fig. 5 is a schematic view of the cross-sectional structure a-a of fig. 3 when the drill bit is installed according to the present invention.
The automatic clamping device comprises a cylinder body 1, a drill bushing 11, a first steel ball groove 12, a protective sleeve clamping groove 13, a protective sleeve positioning groove 14, a cylindrical pin 15, a cylindrical pin positioning groove 16, a second steel ball groove 17, a front cover 2, a replacement sleeve 3, a clamping arrow 31, a protective sleeve 4, a loosening mark 41, a locking mark 42, a drill bit 5, a clamping groove 51, a clamping sleeve 6, a positioning pin 61, a joint surface 62 or joint teeth 63, a steel ball 64, a clamping ring clamping groove 65 and an elastic clamping ring 7.
Detailed Description
Fig. 1 to 5 show a first specific embodiment of the quick clamping device for electric hammer drill bits according to the present invention, which includes a front cover 2 fixed on a machine body, a cylinder body 1 capable of rotating relative to the front cover, and a clamping mechanism, wherein the clamping mechanism includes a drill bushing 11 connected with the cylinder body 1, a clamping bushing 6, a replacing bushing 3, and a drill bit 5, the drill bushing 11 is correspondingly provided with a first steel ball groove 12, a second steel ball groove 17, and a cylindrical pin positioning groove 16, an inner wall of the clamping bushing 6 is provided with a gradual slot 65, an outer wall is provided with a clamping ring slot 64, and a steel ball hole opened on the clamping ring slot 64; the clamping sleeve 6 is rotatably sleeved on the drill sleeve 11, steel balls 63 matched with the first steel ball grooves 12 and the second steel ball grooves 17 are arranged on a steel ball hole of the clamping sleeve, an elastic clamping ring 7 for pressing the steel balls 63 is installed on a clamping ring clamping groove 64, a movable cylindrical pin 15 is installed on a cylindrical pin positioning groove 16, a protruding portion is arranged on the inner side of the cylindrical pin 15, the outer side of the cylindrical pin 15 is matched with the involute groove 65, the protruding portion on the inner side of the cylindrical pin 15 is matched with the clamping groove 51 of the drill bit 5, and the replacement sleeve 3 is fixedly sleeved on the clamping sleeve 6.
In the initial state of the utility model, the steel ball 63 is matched with the second steel ball groove 17, the cylindrical pin 15 is matched with the far end of the involute groove 65, and the cylindrical pin 15 is in loose fit; when the drill bit 5 needs to be installed, the clamping groove 51 of the drill bit 5 is aligned with the loosening mark 41 and the clamping arrow 31 and inserted into the drill bushing 11, then the replacement bushing 3 rotates for 60 degrees, the replacement bushing 3 drives the steel balls 63 to slide from the second steel ball grooves 17 to the first steel ball grooves 12 through the clamping bushing 6, the cylindrical pin 15 slides to the near end from the far end relative to the involute groove 65 of the clamping bushing 6 and pushes the cylindrical pin 15 to be matched with the clamping groove 51 to clamp the drill bit 5, and therefore clamping of the drill bit 5 is completed; when the drill sleeve 11 drives the drill bit 5 to rotate through the cylindrical pin 15 during rotation, and when the cylinder block 1 drives the punch hammer to reciprocate to impact the drill bit 5, the cylindrical pin 15 can axially move relative to the clamping groove 51 of the drill bit 5. The exchange of the drill bit 5 is performed in contrast to the installation of the drill bit 5, and will not be described again here.
In order to ensure that the gradually-opening groove 65 has a relatively reasonable arc length, the included angle between the first ball groove 12 and the second ball groove 17 is controlled to be 45-65 degrees, and the included angle is 60 degrees in the embodiment.
In order to prevent the elastic clamping ring 7 from rotating and shifting, the elastic clamping ring 7 has an opening, and a positioning pin 61 fixedly connected with the clamping sleeve 6 is arranged at the opening.
In order to play a better protection role, the drill bushing 11 is provided with a protective sleeve positioning groove 14 and a protective sleeve clamping groove 13, and the protective sleeve 4 is fixed on the drill bushing 11 by matching with the protective sleeve positioning groove 14 and the protective sleeve clamping groove 13.
The replacement sleeve 3 is provided with a joint surface or joint teeth 62, and the clamping sleeve 6 is mutually sleeved and connected with the joint surface or joint teeth 62 in a matching way.
In order to facilitate the drill bit clamping, the replacing sleeve 3 is provided with a clamping arrow 31, and the protective sleeve 4 is correspondingly provided with a loosening mark 41 and a locking mark 42 which are matched with the clamping arrow 31.
The above description is only the specific embodiment of the present invention, and is not intended to limit the present invention in any form, and the present invention does not depart from the technical solution of the present invention, and the made simple modification, equivalent change or modification all fall into the protection scope of the present invention.
Claims (6)
1. The utility model provides a quick clamping device of electric hammer drill bit, is including fixing protecgulum (2) on the organism, protecgulum (2) pivoted cylinder block (1), clamping machine structure relatively, characterized by: the clamping mechanism comprises a drill bushing (11), a clamping bushing (6), a replacing bushing (3) and a drill bit (5) which are connected with the cylinder body (1) into a whole, wherein a first steel ball groove (12), a second steel ball groove (17) and a cylindrical pin positioning groove (16) are correspondingly arranged on the drill bushing (11), a gradually-opened groove (65) is formed in the inner wall of the clamping bushing (6), and a clamping ring clamping groove (64) and a steel ball hole formed in the clamping ring clamping groove (64) are formed in the outer wall of the clamping bushing; the clamping sleeve (6) is rotatably sleeved on the drill sleeve (11), a steel ball (63) matched with the first steel ball groove (12) and the second steel ball groove (17) is arranged on a steel ball hole of the clamping sleeve, an elastic clamping ring (7) for pressing the steel ball (63) is arranged on a clamping ring clamping groove (64), a movable cylindrical pin (15) is arranged on a cylindrical pin positioning groove (16), the outer side of the cylindrical pin (15) is matched with a gradually-opened groove (65), the inner side of the cylindrical pin (15) is matched with a clamping groove (51) of the drill bit (5), and the replacing sleeve (3) is fixedly sleeved on the clamping sleeve (6); in the initial state, the steel ball (63) is matched with the second steel ball groove (17), the cylindrical pin (15) is matched with the far end of the gradual-opening groove (65), and the cylindrical pin (15) is in loose fit; when a drill bit (5) is installed and the replacing sleeve (3) is rotated for a certain angle, the replacing sleeve (3) drives the steel balls (63) to slide from the second steel ball grooves (17) to the first steel ball grooves (12) through the clamping sleeve (6), the cylindrical pin (15) slides to the near end from the far end relative to the gradually-opened groove (65) of the clamping sleeve (6) and pushes the cylindrical pin (15) to be matched with the clamping groove (51) to clamp the drill bit (5).
2. The quick clamping device for the electric hammer drill bit according to claim 1, which is characterized in that: the included angle between the first steel ball groove (12) and the second steel ball groove (17) is controlled to be 45-65 degrees.
3. The quick clamping device for the electric hammer drill bit according to claim 1 or 2, which is characterized in that: the elastic clamping ring (7) is provided with an opening, and a positioning pin (61) fixedly connected with the clamping sleeve (6) is arranged at the opening.
4. The quick clamping device for the electric hammer drill bit according to claim 3, which is characterized in that: the drill bushing (11) is provided with a protective sleeve positioning groove (14) and a protective sleeve clamping groove (13), and the protective sleeve (4) is fixed on the drill bushing (11) through matching with the protective sleeve positioning groove (14) and the protective sleeve clamping groove (13).
5. The quick clamping device for the electric hammer drill bit according to claim 4, wherein: the replacing sleeve (3) is provided with a joint surface or joint teeth (62), and the clamping sleeve (6) is mutually sleeved by matching with the joint surface or the joint teeth (62).
6. The quick clamping device for the electric hammer drill bit according to claim 5, wherein: the replacement sleeve (3) is provided with a clamping arrow (31), and the protective sleeve (4) is correspondingly provided with a loosening mark (41) and a locking mark (42) which are matched with the clamping arrow (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922309257.6U CN211415029U (en) | 2019-12-20 | 2019-12-20 | Quick clamping device for electric hammer drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922309257.6U CN211415029U (en) | 2019-12-20 | 2019-12-20 | Quick clamping device for electric hammer drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211415029U true CN211415029U (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922309257.6U Active CN211415029U (en) | 2019-12-20 | 2019-12-20 | Quick clamping device for electric hammer drill bit |
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| CN (1) | CN211415029U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114055639A (en) * | 2021-11-19 | 2022-02-18 | 中国建筑第五工程局有限公司 | Detachable alloy drill bit chiseling electric hammer all-in-one machine |
-
2019
- 2019-12-20 CN CN201922309257.6U patent/CN211415029U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114055639A (en) * | 2021-11-19 | 2022-02-18 | 中国建筑第五工程局有限公司 | Detachable alloy drill bit chiseling electric hammer all-in-one machine |
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