CN206000448U - A kind of stretching structure of ladder - Google Patents
A kind of stretching structure of ladder Download PDFInfo
- Publication number
- CN206000448U CN206000448U CN201620821131.0U CN201620821131U CN206000448U CN 206000448 U CN206000448 U CN 206000448U CN 201620821131 U CN201620821131 U CN 201620821131U CN 206000448 U CN206000448 U CN 206000448U
- Authority
- CN
- China
- Prior art keywords
- bushing
- trocar sheath
- inner sleeve
- stretching structure
- ladder
- 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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- Ladders (AREA)
Abstract
This utility model is related to ladder technical field, disclose a kind of stretching structure of ladder, including trocar sheath and scalable inner sleeve in trocar sheath, the flexible limiting unit of described inner sleeve is connected with bushing, described bushing is located between trocar sheath and inner sleeve, and the end of described trocar sheath is provided for limiting the fastening seat of bushing；This stretching structure is when using, rubbed using between bushing and trocar sheath, bushing carries out structural strengthening to the flexible limiting unit of inner sleeve simultaneously, realize double-deck ruggedized construction, substantially increase service life, and this structure is during fabrication, the dimensional fits degree of freedom between inner sleeve and trocar sheath higher it is ensured that the structural compactness of ladder.
Description
Technical field
This utility model is related to ladder technical field, more particularly, to a kind of stretching structure of ladder.
Background technology
Existing structure of telescopic ladder is mainly made up of trocar sheath and inner sleeve, during contraction, inner sleeve is retracted to trocar sheath
In, when stretching out, inner sleeve is directly limited although the structure of this extension ladder is relatively simple using controlling lock to stretch out,
But actual life is limited, its reason is the mode that this direct utilization inner sleeve limits, in conjunction with this sleeve pipe itself
Wall thickness is relatively limited, in Reusability, easily forms larger abrasion；Gap between inner sleeve and trocar sheath needs simultaneously
It is accurately controlled, gap too conference affects the compact of structure, and gap is too little and flexible difficulty can be caused to increase, in view of
This, inventor has made improvement to this.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of stretching structure of ladder, and this is flexible
Compact conformation, easily manufactured, long service life.
For achieving the above object, the stretching structure of a kind of ladder of the present utility model, including trocar sheath and scalable in outer
Inner sleeve in sleeve pipe, the flexible limiting unit of described inner sleeve is connected with bushing, described bushing be located at trocar sheath and inner sleeve it
Between, the end of described trocar sheath is provided for limiting the fastening seat of bushing.
Further, described bushing is provided with opening.
Further, the flexible limiting unit of described inner sleeve is provided with connecting hole, and described bushing is provided with and can stretch into connection
The protuberance in hole.
Further, the opening of described bushing is provided with bending part.
Further, described bushing is provided with the thickening part for amplifying thickness.
Further, described fastening seat is provided with annular restraining portion, and the internal diameter of described annular restraining portion is less than trocar sheath
Internal diameter.
Further, described fastening seat is provided with open slot, and the two ends of described open slot are provided with fastener hole.
The beneficial effects of the utility model：Compared with prior art, the stretching structure of a kind of ladder of the present utility model, bag
Include trocar sheath and scalable inner sleeve in trocar sheath, the flexible limiting unit of described inner sleeve is connected with bushing, described bushing
Between trocar sheath and inner sleeve, the end of described trocar sheath is provided for limiting the fastening seat of bushing；This stretching structure exists
During use, rubbed using between bushing and trocar sheath, bushing carries out structural strengthening to the flexible limiting unit of inner sleeve simultaneously,
Realize double-deck ruggedized construction, substantially increase service life, and this structure is during fabrication, the chi between inner sleeve and trocar sheath
Very little cooperation degree of freedom higher it is ensured that the structural compactness of ladder.
Brief description
Fig. 1 is structural representation of the present utility model.
Fig. 2 is structural decomposition diagram of the present utility model.
Fig. 3 is complete section structural representation of the present utility model.
Fig. 4 is mplifying structure schematic diagram at the A of Fig. 3.
Fig. 5 is the structural representation of fastening seat of the present utility model.
Fig. 6 is bushing deployed configuration schematic diagram of the present utility model.
Fig. 7 is that bushing of the present utility model launches another structural representation.
Reference：
Trocar sheath -- 1, inner sleeve -- 2, connecting hole -- 21, bushing -- 3, protuberance -- 31, bending part -- 32, thickening part --
33, fasten seat -- 4, annular restraining portion -- 41, open slot -- 42, fastener hole -- 43.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in detail.
Referring to Fig. 1 to Fig. 7, a kind of stretching structure of ladder, including trocar sheath 1 and scalable inner sleeve in trocar sheath 1
Pipe 2, the flexible limiting unit of described inner sleeve 2 is connected with bushing 3, herein, it should be noted that：The quantity of this bushing 3 completely may be used
It is correspondingly arranged with the quantity of the flexible limiting unit according to inner sleeve 2, for example：This inner sleeve 2 is provided with two flexible height,
Two flexible limiting units obviously will be set, then, corresponding just two bushings 3 of setting.In this attachment structure, described bushing 3
Between trocar sheath 1 and inner sleeve 2, the end of described trocar sheath 1 is provided for limiting the fastening seat 4 of bushing 3；This flexible knot
Structure, when using, is rubbed using between bushing 3 and trocar sheath 1, bushing 3 is carried out to the flexible limiting unit of inner sleeve 2 simultaneously
Structural strengthening, realizes double-deck ruggedized construction, substantially increases service life, and this structure is during fabrication, inner sleeve 2 and overcoat
Dimensional fits degree of freedom between pipe 1 higher it is ensured that the structural compactness of ladder.
Certainly, in order to ensure bushing 3 has higher elastic strain when flexible, described bushing 3 is provided with opening.With
When, described bushing 3 can improve further preferably with the metal material manufacture such as tool aluminium alloy, service life.
With regard to the connected mode of bushing 3 and inner sleeve 2, in the present embodiment, the flexible limiting unit setting of described inner sleeve 2
There is connecting hole 21, described bushing 3 is provided with the protuberance 31 that can stretch into connecting hole 21.When mounted, tied using the opening of bushing 3
Corresponding for bushing 3 flexible limiting unit is directly snapped in, makes protuberance 31 and connecting hole 21 corresponding clamping again by structure, in general,
Protuberance 31 is corresponding with the shape of connecting hole 21 to can achieve clamping.
In the technical program, the opening of described bushing 3 is provided with bending part 32.As Fig. 7, this bending part 32 can plus
The size of thick bushing 3, this bending part 32 can to the inner side bending of bushing 3 it is also possible to bushing 3 outside bending, certainly, be
Avoid affecting the lock action of ladder, preferably with inner side bending structure.
Referring to Fig. 7, certainly, it is alternatively：Described bushing 3 is provided with the thickening part for amplifying thickness
33.Bending part can also be arranged using the either segment in bushing 3, by the way of inflection.
In the technical program, described fastening seat 4 is provided with annular restraining portion 41, and the internal diameter of described annular restraining portion 41 is little
Internal diameter in trocar sheath 1.When pulling out inner sleeve 2, when bushing 3 slides into the oral area of trocar sheath 1, in annular restraining portion 41
Under effect, now, skidding off of bushing 3 is limited, it is to avoid excessively pull-out bushing 3.
For this stretching structure, described fastening seat 4 is provided with open slot 42, and the two ends of described open slot 42 are respectively provided with
There is fastener hole 43.When this open slot 42 makes fastening seat 4 be assembled with trocar sheath 1, convenient, after being assembled in place, utilize
Bolt carries out screwing through fastener hole 43, assembles suitable convenience；Another it should be noted that：This fastening seat 4 can be direct
As rung of a ladder connecting seat, the structure of ladder so can be simplified further, cost-effective.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to this reality
With new thought, all will change in specific embodiments and applications, this specification content should not be construed as
To restriction of the present utility model.
Claims (7)
1. a kind of stretching structure of ladder, including trocar sheath and scalable inner sleeve in trocar sheath it is characterised in that：Described
The flexible limiting unit of inner sleeve is connected with bushing, and described bushing is located between trocar sheath and inner sleeve, the end of described trocar sheath
It is provided for limiting the fastening seat of bushing.
2. a kind of ladder according to claim 1 stretching structure it is characterised in that：Described bushing is provided with opening.
3. a kind of ladder according to claim 2 stretching structure it is characterised in that：The flexible limiting unit of described inner sleeve
It is provided with connecting hole, described bushing is provided with the protuberance that can stretch into connecting hole.
4. a kind of ladder according to claim 2 stretching structure it is characterised in that：The opening of described bushing is provided with
Bending part.
5. a kind of ladder according to claim 2 stretching structure it is characterised in that：Described bushing is provided with for increasing
The thickening part of dimensional thickness.
6. a kind of ladder according to claim 1 stretching structure it is characterised in that：Described fastening seat is provided with annular limit
Portion processed, the internal diameter of described annular restraining portion is less than the internal diameter of trocar sheath.
7. a kind of ladder according to any one of claim 1 ~ 6 stretching structure it is characterised in that：Described fastening seat setting
There is open slot, the two ends of described open slot are provided with fastener hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821131.0U CN206000448U (en) | 2016-08-01 | 2016-08-01 | A kind of stretching structure of ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821131.0U CN206000448U (en) | 2016-08-01 | 2016-08-01 | A kind of stretching structure of ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206000448U true CN206000448U (en) | 2017-03-08 |
Family
ID=58201554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620821131.0U Expired - Fee Related CN206000448U (en) | 2016-08-01 | 2016-08-01 | A kind of stretching structure of ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206000448U (en) |
-
2016
- 2016-08-01 CN CN201620821131.0U patent/CN206000448U/en not_active Expired - Fee Related
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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: 20170308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |