CN206306084U - Perforate dust cover - Google Patents
Perforate dust cover Download PDFInfo
- Publication number
- CN206306084U CN206306084U CN201621473263.5U CN201621473263U CN206306084U CN 206306084 U CN206306084 U CN 206306084U CN 201621473263 U CN201621473263 U CN 201621473263U CN 206306084 U CN206306084 U CN 206306084U
- Authority
- CN
- China
- Prior art keywords
- lid
- hole
- dust cover
- telescopic tube
- annular
- 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.)
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- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The utility model discloses a kind of perforate dust cover, including wave structure telescopic tube and be sealedly connected on the lid of telescopic tube one end, the center bottom of lid is provided with through hole, bearing is embedded with through hole；The utility model in the through hole of lid by being embedded bearing, so, when drill bit is installed in telescopic tube, the drilling rod of drill bit wears within the bearing, when drill bit is rotated, the drilling rod of drill bit will not produce friction with the inwall of through hole, so, perforate dust cover can be avoided to follow the appearance of the phenomenon of drill bit rotation, improves security, and the abrasion of through hole can be avoided, improve service life of the present utility model.
Description
Technical field
The utility model belongs to drilling equipment technical field, is related to a kind of perforate dust cover.
Background technology
At present, it is necessary to open up Down lamp hole or shot-light hole on gypsum with rig, perforate is dust-proof in fitment process
The effect of cover is, when rig punches, the dust collection of generation of punching can to get up, and prevents being scattered for dust；But mesh
Deficiency existing for preceding perforate dust cover is：The drilling rod of drill bit is directly located in the through hole of perforate dust cover, and one can go out
Existing perforate dust cover follows the phenomenon that drill bit is rotated, and there is potential safety hazard, and the inwall of two drilling rods and through hole for carrying out drill bit can be produced
Friction, so as to the inwall of through hole can be caused the phenomenon of abrasion, so during the use of perforate dust cover, through hole occur
Aperture can be increasing, cause the damage of perforate dust cover.
The content of the invention
Regarding to the issue above, the technical problems to be solved in the utility model be to provide a kind of drilling rod that can avoid drill bit with
The through hole of lid produces the perforate dust cover of friction.
Perforate dust cover of the present utility model, including wave structure telescopic tube and be sealedly connected on telescopic tube one
The lid at end, the center bottom of lid is provided with through hole, and bearing is embedded with through hole.
Perforate dust cover of the present utility model, wherein, the through hole of lid is provided with the annular extension coaxial with through hole.
Perforate dust cover of the present utility model, wherein, one end that telescopic tube is connected with lid is provided with annular vertical portion,
Circular fold is provided with lid, circular fold is sleeved on the outside in annular vertical portion.
Perforate dust cover of the present utility model, wherein, external screw thread is provided with the outer wall in annular vertical portion, circular fold
The internal thread that can be connected with the external screw thread on annular vertical portion outer wall is provided with inwall.
Perforate dust cover of the present utility model, wherein, telescopic tube is provided with inside annular folding towards one end of lid
Curved, annular bending offsets with the inner bottom surface of lid.
Perforate dust cover of the present utility model, wherein, ring-shaped step is provided with the outer wall of bearing, set on the inwall of through hole
It is equipped with the annular groove that can match with ring-shaped step.
Perforate dust cover of the present utility model, wherein, the annular that the bottom of lid is provided with towards telescopic tube side is inclined
Inclined portion.
The utility model beneficial effect：The utility model so, is being bored by being embedded bearing in the through hole of lid
When head is installed in telescopic tube, the drilling rod of drill bit wears within the bearing, and when drill bit is rotated, the drilling rod of drill bit will not be with through hole
Inwall produce friction, so, can avoid perforate dust cover follow drill bit rotate phenomenon appearance, improve safety
Property, and the abrasion of through hole can be avoided, improve service life of the present utility model.
Brief description of the drawings
For ease of explanation, the utility model is described in detail by following specific implementations and accompanying drawing.
Fig. 1 is semi-section structural representation of the present utility model.
Specific embodiment
Perforate dust cover as shown in Figure 1, including wave structure telescopic tube 1 and be sealedly connected on telescopic tube 1
The lid 2 of one end, the center bottom of lid 2 is provided with through hole 21, and bearing 3 is embedded with through hole 21.
By being embedded bearing in the through hole of lid, so, when drill bit is installed in telescopic tube, the brill of drill bit
Bar wears within the bearing, and when drill bit is rotated, the drilling rod of drill bit will not produce friction with the inwall of through hole, so, can
The appearance of the phenomenon that perforate dust cover follows drill bit to rotate is avoided, security is improve, and the abrasion of through hole can be avoided, improved
Service life of the present utility model.
The annular extension 22 coaxial with through hole 21 is provided with the through hole 21 of lid 2；So set, bearing can be increased
With the contact area of through hole, the installation strength of bearing is improved.
One end that telescopic tube 1 is connected with lid 2 is provided with annular vertical portion 11, and circular fold 23 is provided with lid 2,
Circular fold 23 is sleeved on the outside in annular vertical portion 11；So set, the contact area of telescopic tube and lid can be increased,
Improve bonding strength.
External screw thread is provided with the outer wall in annular vertical portion 11, being provided with the inwall of circular fold 23 can be with annular vertical
The internal thread that external screw thread on the outer wall of portion 11 is connected, is so set, can be to telescopic tube and the dismounting side of bringing of lid
Just.
Telescopic tube 1 is provided with inside annular bending 12 towards one end of lid 2, and annular bending 12 is interior with lid 2
Bottom surface offsets；So set, the annular vertical portion of telescopic tube can be avoided the phenomenon of deformation occur, it is possible to increase telescopic tube
With the connection reliability of lid.
Ring-shaped step 31 is provided with the outer wall of bearing 3, being provided with the inwall of through hole 21 can match with ring-shaped step 31
Annular groove 24；So set, it is possible to increase the bonding strength of bearing and lid.
The bottom of lid 2 is provided with the annular rake 25 towards the side of telescopic tube 1；So set, in the brill of drill bit
Bar is installed to when on electric drill, can give spanner when the drilling rod of drill bit is locked can to the installation slot milling of drill bit, i.e. electric drill
Reserve installing space.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New spirit and scope are defined.On the premise of the utility model design concept is not departed from, this area ordinary person couple
The all variations and modifications that the technical solution of the utility model is made, all should drop into protection domain of the present utility model, this reality
With new claimed technology contents, all record in detail in the claims.
Claims (7)
1. a kind of perforate dust cover, it is characterised in that：Telescopic tube (1) including wave structure and it is sealedly connected on telescoping tube
The lid (2) of body (1) one end, the center bottom of the lid (2) is provided with through hole (21), and axle is embedded with the through hole (21)
Hold (3).
2. perforate dust cover according to claim 1, it is characterised in that：Through hole (21) place of the lid (2) is provided with
The annular extension (22) coaxial with through hole (21).
3. perforate dust cover according to claim 2, it is characterised in that：What the telescopic tube (1) was connected with lid (2)
One end is provided with annular vertical portion (11), and circular fold (23), circular fold (23) suit are provided with the lid (2)
In the outside of annular vertical portion (11).
4. perforate dust cover according to claim 3, it is characterised in that：Set on the outer wall of the annular vertical portion (11)
There is external screw thread, being provided with the inwall of the circular fold (23) can coordinate company with the external screw thread on annular vertical portion (11) outer wall
The internal thread for connecing.
5. the perforate dust cover according to claim 1 or 2 or 3 or 4, it is characterised in that：Telescopic tube (1) the direction lid
One end of body (2) is provided with inside annular bending (12), and the annular bending (12) offsets with the inner bottom surface of lid (2).
6. the perforate dust cover according to claim 1 or 2 or 3 or 4, it is characterised in that：Set on the outer wall of the bearing (3)
Ring-shaped step (31) is equipped with, the annular groove that can match with ring-shaped step (31) is provided with the inwall of the through hole (21)
(24)。
7. the perforate dust cover according to claim 1 or 2 or 3 or 4, it is characterised in that：The bottom of the lid (2) is set
There is the annular rake (25) towards telescopic tube (1) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473263.5U CN206306084U (en) | 2016-12-30 | 2016-12-30 | Perforate dust cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473263.5U CN206306084U (en) | 2016-12-30 | 2016-12-30 | Perforate dust cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206306084U true CN206306084U (en) | 2017-07-07 |
Family
ID=59248801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621473263.5U Active CN206306084U (en) | 2016-12-30 | 2016-12-30 | Perforate dust cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206306084U (en) |
-
2016
- 2016-12-30 CN CN201621473263.5U patent/CN206306084U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |