CN201525006U - Clamping device of electric hammer drill bit - Google Patents
Clamping device of electric hammer drill bit Download PDFInfo
- Publication number
- CN201525006U CN201525006U CN2009201940413U CN200920194041U CN201525006U CN 201525006 U CN201525006 U CN 201525006U CN 2009201940413 U CN2009201940413 U CN 2009201940413U CN 200920194041 U CN200920194041 U CN 200920194041U CN 201525006 U CN201525006 U CN 201525006U
- Authority
- CN
- China
- Prior art keywords
- chuck
- slotted eye
- electric hammer
- hammer drill
- clamping device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a clamping device of an electric hammer drill bit, comprising a chuck sleeve (1); the front end of the chuck sleeve (1) is provided with an axial drilling rod inserting hole (2), and the wall surface thereof is provided with an axial grooved hole (3) which is internally provided with steel balls (4) capable of falling into the inserting hole partially; the chuck sleeve is externally sheathed with a chuck iron ring (5) capable of axially moving; the chuck iron ring is provided with chuck large glue (12), the distance of the inner surface of the chuck iron ring to the bottom surface of the grooved hole is smaller than the diameter of each steel ball; the front part of the chuck sleeve is provided with a limiting ring (6) which can block the chuck iron ring so as to lead the chuck iron ring to be limited at the front part of the grooved hole; the chuck sleeve of the rear section of the chuck iron ring is sheathed with a support ring (7) capable of axially moving; the inner edge of the support ring is provided with a blocking edge (8) capable of blocking the steel balls; and the chuck sleeve is provided with a spring (9) which acts on the support ring and leads the support ring to push forwards. The clamping device realizes positioning of the steel balls by the blocking edge of the support ring, does not need to use the existing elastic piece band spring and a band spring groove, and has shock resistance, good durability and long service life.
Description
Technical field
The utility model relates to a kind of bit holder device of electric hammer.
Background technology
In the market, the bit holder device of the front portion of common electric hammer generally oppresses steel ball to carry out the clamping operation by the shell fragment garter spring.The mounting structure of shell fragment garter spring is the garter spring groove that is provided with annular on the outside wall surface of chuck cover, and described shell fragment garter spring is located in the garter spring groove.The bit holder device of this structure is because the intensity of shell fragment garter spring is less, and impulsive force is big during electric hammer work, and the shell fragment garter spring damages easily.In addition, owing to will offer the garter spring groove of an annular on the outside wall surface of chuck cover, the existence of garter spring groove also makes the bulk strength of chuck cover reduce, and is durable inadequately.
The utility model content
The purpose of this utility model is to provide a kind of clamping convenience, body intensity height, electric hammer drill clamping device that durability is good.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the electric hammer drill clamping device, comprise the chuck cover, the front end of chuck cover is provided with axial drilling rod patchhole, offer axial slotted eye on the wall of described chuck cover, be provided with the steel ball that can partly fall in the drilling rod patchhole in the slotted eye, described chuck cover is outer, and be with can axially movable chuck iron hoop, the chuck iron hoop is provided with the big glue of chuck, described chuck iron hoop inner face is to the distance of the slotted eye bottom surface diameter less than steel ball, the front portion of described chuck cover is provided with can be blocked the chuck iron hoop and make it be limited in the spacing ring of slotted eye front portion, put at the chuck of chuck iron hoop back segment that be arranged with can axially movable filler ring, the interior edge of described filler ring is provided with the rib that can block steel ball, and described chuck puts to be provided with and acts on the spring that it is pushed away forward.
The outer wall that described chuck is enclosed within the slotted eye position is provided with the plane of matching with edge in the rib.
Described rib is provided with guiding surface.
Described slotted eye is two, is symmetricly set on chuck and puts, and described filler ring is corresponding in the slotted eye position to be provided with two ribs.
Described two ribs are not established at grade.
The guiding surface of described two ribs is high on one side, the low asymmetric distribution in one side.
Owing to adopted above-mentioned structure, the location that the utility model is realized steel ball by the filler ring rib does not need with existing shell fragment garter spring, and the filler ring rib can be made thicklyer, and intensity is higher, and is more durable.The garter spring groove that does not also need to offer an annular on the outside wall surface of chuck cover, the bulk strength height of chuck cover, shock-resistant, durability is good, and the life-span is long.
Below in conjunction with the drawings and specific embodiments the utility model is done further detailed description, but do not constitute any restriction of the present utility model.
Description of drawings
Fig. 1 is the sectional structure chart of electric hammer drill clamping device;
Sectional structure chart when Fig. 2 inserts drill bit for Fig. 1;
Fig. 3 is the stereogram of chuck cover;
Fig. 4 is the stereogram of filler ring;
Fig. 5 is the plane of filler ring.
The specific embodiment
As shown in Figure 1, electric hammer drill clamping device described in the utility model comprises the chuck cover 1 that is located at electric hammer body front portion, and the rear portion of chuck cover 1 is located in the cylinder sleeve 13 of electric hammer body.The front end of chuck cover 1 is provided with axial drilling rod patchhole 2, and described drilling rod patchhole 2 can be circular hole or square hole.Offer axial slotted eye 3 on the wall of described chuck cover 1, described slotted eye 3 is two, is symmetrically distributed in along the axle center on the wall of chuck cover 1.Be provided with the steel ball 4 that can partly fall in the drilling rod patchhole 2 in the slotted eye 3, the bottom of slotted eye 3 is slightly less than the top, and also greater than the bottom width of slotted eye 3, steel ball 4 just can partly fall in the drilling rod patchhole 2 diameter of steel ball 4 like this.Described chuck cover 1 is outer, and be with can axially movable chuck iron hoop 5, also can be provided with on the chuck iron hoop 3 to be suitable for the big glue 12 of chuck that staff grips, and the big glue 12 of chuck is provided with a room that can hold steel ball 4 in the front portion of chuck iron hoop 5.Described chuck iron hoop 5 inner faces are to the distance of the slotted eye 3 bottom surfaces diameter less than steel ball 4.In the time of can guaranteeing that like this steel ball 4 is in the pairing slotted eye 3 in chuck iron hoop 5 positions, can partly fall in the drilling rod patchhole 2.The front portion of described chuck cover 1 is provided with can be blocked chuck iron hoop 5 and make it be limited in the spacing ring 6 of slotted eye 3 front portions.Spacing ring 6 can adopt snap ring to connect or the mode that is spirally connected is assemblied on the chuck cover 1, and present embodiment is to overlap 1 front end at chuck annular groove 13 is set, and spacing ring 6 is a snap ring, is arranged in the annular groove 13.Spacing ring 6 can prevent that chuck iron hoop 5 from overlapping 1 front end from chuck and deviating from, and when making chuck iron hoop 5 be in chuck to overlap 1 front end, the inner face of chuck iron hoop 5 is in the front portion of slotted eye 3.Being arranged with on the chuck of chuck iron hoop 5 back segments cover 1 can axially movable filler ring 7, the interior edge of described filler ring 7 is provided with the rib 8 that can block steel ball 4, rib 8 is arranged on the rear of steel ball 4, because described slotted eye 3 is two, described filler ring 7 is corresponding two slotted eye 3 positions to be provided with two ribs 8.Described chuck cover 2 is provided with to act on and makes its spring that pushes away forward 9 on the filler ring 7, and the end top of spring 9 is located on the filler ring 7, and other end top is located on the chuck cover 2, also can push up to be located on the cylinder sleeve 13.Under the effect of spring 9, filler ring 7 fits with chuck iron hoop 5 to the front end top of chuck cover 1, and rib 8 is in the pairing slotted eye 3 in chuck iron hoop 5 positions steel ball 4.
As shown in Figure 2, at drilling rod patchhole 2 when the direction of arrow is inserted drill bit 14, steel ball 4 is pushed up in the inner of drill bit 14, promoting steel ball 4 inwardly pushes up, steel ball 4 acts on the rib 8, and steel ball 4 is compressed spring 9, and keep chuck iron hoop 5 motionless this moment, steel ball 4 can enter between filler ring 7 and the chuck iron hoop 5 along the direction of arrow, and drill bit 14 can continue to insert.Drill bit 14 inserts when putting in place, and filler ring 7 oppresses steel ball 4 to enter in the draw-in groove of drill bit 14 under the effect of spring 9, and filler ring 7 fits with chuck iron hoop 5, and drill bit 14 promptly is stuck in the drilling rod patchhole 2.When needs are transferred to drill bit 14, press the big glue 12 of chuck backward, make chuck iron hoop 5 be positioned at the rear portion of slotted eye 3, dial drill bit 14, steel ball 4 enters into the room of chuck iron hoop 5 and the big glue 12 of chuck, and drill bit 14 can be transferred to.Chuck iron hoop 5 resets under the effect of spring.
As shown in Figure 3, described chuck cover 1 is provided with the plane 10 of matching with edge in the rib 8 on the outer wall of slotted eye 3 positions, when rib 8 is set, on the interior edge of filler ring 7 side cut is set and gets final product, and the assembling of filler ring 7 is convenient on this plane 10.
As Fig. 1, Fig. 4 and shown in Figure 5, described rib 8 is provided with guiding surface 11, rib 8 is bent to form guiding surface 11 backward, form a space like this between rib 8 and chuck iron hoop 5 end faces less than steel ball 4, guiding surface 11 play the guiding role, and is convenient to steel ball 4 and enters between rib 8 and chuck iron hoop 3 end faces.As inclined-plane 11 is not set, described two ribs 8 are not established at grade.As inclined-plane 11 is set, the guiding surface 11 of described two ribs 8 is high on one side, the low asymmetric distribution in one side.When inserting drill bit 14 like this, two steel balls 4 can not gone between filler ring 7 and the chuck iron hoop 5 with stepping, so just do not need to keep chuck iron hoop 5 motionless with external force, the convenient drill bit 14 that inserts.
Claims (7)
1. electric hammer drill clamping device, comprise chuck cover (1), the front end of chuck cover (1) is provided with axial drilling rod patchhole (2), offer axial slotted eye (3) on the wall of described chuck cover (1), be provided with the steel ball (4) that can partly fall in the drilling rod patchhole (2) in the slotted eye (3), described chuck cover (1) is outer, and be with can axially movable chuck iron hoop (5), chuck iron hoop (5) is provided with the big glue of chuck (12), described chuck iron hoop (5) inner face is to the distance of slotted eye (3) the bottom surface diameter less than steel ball (4), the front portion of described chuck cover (1) is provided with can be blocked chuck iron hoop (5) and make it be limited in the anterior spacing ring (6) of slotted eye (3), it is characterized in that: being arranged with on the chuck cover (1) of chuck iron hoop (5) back segment can axially movable filler ring (7), the interior edge of described filler ring (7) is provided with the rib (8) that can block steel ball (4), and described chuck cover (2) is provided with to act on and makes its spring that pushes away forward (9) on the filler ring (7).
2. according to the described electric hammer drill clamping device of claim 1, it is characterized in that: described chuck cover (1) is provided with the plane (10) of matching with edge in the rib (8) on the outer wall of slotted eye (3) position.
3. according to claim 1 or 2 described electric hammer drill clamping devices, it is characterized in that: described rib (8) is provided with guiding surface (11).
4. according to claim 1 or 2 described electric hammer drill clamping devices, it is characterized in that: described slotted eye (3) is two, is symmetricly set on the chuck cover (1), and described filler ring (7) is corresponding two ribs (8) that are provided with in slotted eye (3) position.
5. according to the described electric hammer drill clamping device of claim 4, it is characterized in that: described two ribs (8) are not established at grade.
6. according to the described electric hammer drill clamping device of claim 3, it is characterized in that: described slotted eye (3) is two, is symmetricly set on the chuck cover (1), and described filler ring (7) is corresponding two ribs (8) that are provided with in slotted eye (3) position.
7. according to the described electric hammer drill clamping device of claim 6, it is characterized in that: the guiding surface (11) of described two ribs (8) is high, the low asymmetric distribution in one side on one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201940413U CN201525006U (en) | 2009-09-04 | 2009-09-04 | Clamping device of electric hammer drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201940413U CN201525006U (en) | 2009-09-04 | 2009-09-04 | Clamping device of electric hammer drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201525006U true CN201525006U (en) | 2010-07-14 |
Family
ID=42516303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201940413U Expired - Fee Related CN201525006U (en) | 2009-09-04 | 2009-09-04 | Clamping device of electric hammer drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201525006U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248521A (en) * | 2011-06-14 | 2011-11-23 | 常熟市迅达粉末冶金有限公司 | Tool chuck |
| CN103894649A (en) * | 2012-12-24 | 2014-07-02 | 苏州宝时得电动工具有限公司 | Twist drill with locating hole punching function |
| GB2522341A (en) * | 2014-01-15 | 2015-07-22 | Milwaukee Electric Tool Corp | Bit retention assembly for rotary hammer |
-
2009
- 2009-09-04 CN CN2009201940413U patent/CN201525006U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248521A (en) * | 2011-06-14 | 2011-11-23 | 常熟市迅达粉末冶金有限公司 | Tool chuck |
| CN103894649A (en) * | 2012-12-24 | 2014-07-02 | 苏州宝时得电动工具有限公司 | Twist drill with locating hole punching function |
| CN103894649B (en) * | 2012-12-24 | 2016-08-17 | 苏州宝时得电动工具有限公司 | There is the fluted drill of im-pact location hole function |
| GB2522341A (en) * | 2014-01-15 | 2015-07-22 | Milwaukee Electric Tool Corp | Bit retention assembly for rotary hammer |
| GB2522341B (en) * | 2014-01-15 | 2017-04-05 | Milwaukee Electric Tool Corp | Bit retention assembly for rotary hammer |
| US11007631B2 (en) | 2014-01-15 | 2021-05-18 | Milwaukee Electric Tool Corporation | Bit retention assembly for rotary hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20140904 |
|
| EXPY | Termination of patent right or utility model |