CN202755981U - Retractable structure - Google Patents
Retractable structure Download PDFInfo
- Publication number
- CN202755981U CN202755981U CN 201220398997 CN201220398997U CN202755981U CN 202755981 U CN202755981 U CN 202755981U CN 201220398997 CN201220398997 CN 201220398997 CN 201220398997 U CN201220398997 U CN 201220398997U CN 202755981 U CN202755981 U CN 202755981U
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- CN
- China
- Prior art keywords
- stretching structure
- telescopic
- protective cover
- structure according
- protecting crust
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- Expired - Lifetime
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Abstract
The utility model relates to a retractable structure which comprises a plurality of retractable units (8), wherein the plurality of retractable units can make retractable motions relative to one another. And each retractable unit is provided with a protective cover which comprises a plurality of protective shells (1), wherein the plurality of protective shells can make retractable motions relative to one another. Each protective shell (1) is arranged on the corresponding retractable unit (8) and can retract with the corresponding retractable unit (8) at the same time. Each retractable structure is provided with the protective cover, and the protective shell of the protective cover can retract with the corresponding retractable unit at the same time, and therefore the retractable units can be protected under the premise of not impeding motion and operation of the retractable units.
Description
Technical field
The utility model relates to engineering machinery field, particularly, relates to a kind of stretching structure, and this stretching structure is provided with protective cover.
Background technology
Wet concrete sprayer is the substitute products of dry spraying machine, its principle is to utilize compressed air, with the concrete material that mixes, go out through the nozzle high velocity jet of spraying machine by carrier pipe, thereby be subjected to spray plane to form concrete supporting, be the capital equipment in the present construction of shotcrete operation, be widely used in the construction of construction work.Because concrete sprayer is mainly constructed in tunnel, inclined shaft, construction environment has strict restriction to the job area of complete machine height and jib, therefore polygamy is equipped with telescopic jib in the concrete sprayer.
Concrete sprayer owing to the impact of the reasons such as aerodynamic interference, unavoidably has concrete resilience in the process of sprayed mortar, after the concrete of resilience drops on the telescopic jib, if untimely the cleaning can be solidified at jib.Limited because of flexible gap between each telescopic arm of telescopic jib, the concrete that solidifies can affect the flexible of telescopic arm, can cause the telescopic arm clamping stagnation when serious, and equipment can't normally be used.In addition, because in the prior art, general adopt mode or the external mode of single oil cylinder that built-in oil cylinder is combined with external oil cylinder to come jib is carried out motion control, if having concrete to drop on the oil cylinder during work, certainly will also can cause ill effect to the performance of oil cylinder.
Except the telescopic jib of concrete sprayer, also have the similar engineering machinery of a lot of structures also to have the problems referred to above.
The utility model content
The purpose of this utility model provides a kind of stretching structure, and this stretching structure is provided with protective cover, this protective cover can with the telescopic unit synchronization telescope of this stretching structure, to reduce dust, smear metal and splash etc. to the damage of telescopic unit.This stretching structure can be the telescopic jib of telescopic jib, especially concrete sprayer.
To achieve these goals, the utility model provides a kind of stretching structure, this stretching structure comprise relative to each other can stretching motion a plurality of telescopic units, and, this stretching structure is provided with protective cover, this protective cover comprise relative to each other can stretching motion a plurality of protecting crusts, each protecting crust be separately positioned on the corresponding telescopic unit and can with this telescopic unit synchronization telescope.
Preferably, each described protecting crust forms the semi-surrounding shape that a side is opened wide.
Preferably, each described protecting crust is along the open at both ends of the flexible direction of described protective cover.
Preferably, be provided with slide-and-guide section between two described protecting crusts adjacent one another are.
Preferably, described slide-and-guide section comprises slide block and guide rail, and described slide block and described guide rail are separately positioned on the relative surface of two adjacent described protecting crusts and are fitted to each other.
Preferably, be provided with the support portion between two described protecting crusts adjacent one another are, this support portion is fixed therein on the surface of a protecting crust.
Preferably, be furnished with symmetrically respectively described support portion in the both sides of each described slide-and-guide section.
Preferably, each described telescopic unit has bracing frame, and each described protecting crust is installed on the corresponding telescopic unit by this bracing frame.
Preferably, the front end of direction is stretched out on the support frame as described above edge that is arranged on each described telescopic unit.
Preferably, described stretching structure is the telescopic jib of concrete sprayer.
Preferably, on telescopic unit one side surface of described telescopic jib telescopic oil cylinder is installed, correspondence one side of described protective cover is formed be used to the space that holds this telescopic oil cylinder.
Pass through technique scheme, make stretching structure be provided with protective cover, the protecting crust of this protective cover be separately positioned on the corresponding telescopic unit and with this telescopic unit synchronization telescope, thereby can under the prerequisite of the motion that does not hinder telescopic unit and operation, reduce dust, smear metal and splash etc. to the damage of telescopic unit.Can be telescopic jib according to stretching structure of the present utility model, for example, the telescopic jib of concrete sprayer, has the concrete sprayer of this stretching structure in the process of sprayed mortar, because the existence of the protective cover of synchronization telescope being arranged, the concrete that can avoid resilience solidifies at jib and causes the telescopic arm clamping stagnation that equipment can't normally be used and the performance to telescopic oil cylinder causes ill effect on the telescopic oil cylinder because concrete drops to.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and consists of the part of manual, is used from explanation the utility model with the following specific embodiment one, but does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the front view according to stretching structure of the present utility model;
Fig. 2 is the structural representation of looking up according to stretching structure of the present utility model;
Fig. 3 is the stereogram according to stretching structure of the present utility model, wherein, has omitted the protective cover of this stretching structure;
Fig. 4 is the front view of the protective cover according to stretching structure of the present utility model when being in contraction state;
Fig. 5 is that the protective cover of the stretching structure among Fig. 4 is along the view of A direction;
Fig. 6 is the enlarged drawing of circle I part among Fig. 5.
Description of reference numerals
1 protecting crust, 2 slide-and-guide sections
3 support portions, 4 slide blocks
5 guide rails, 6 telescopic oil cylinders
7 spaces, 8 telescopic units
9 bracing frames
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
In the utility model, the stretching structure that the noun of locality of use normally provides at the utility model such as " upper and lower " and " left and right " in the accompanying drawings shown in direction.
Extremely shown in Figure 2 such as Fig. 1, according to stretching structure of the present utility model comprise relative to each other can stretching motion a plurality of telescopic units 8, and, this stretching structure is provided with protective cover, this protective cover comprise relative to each other can stretching motion a plurality of protecting crusts 1, each protecting crust 1 be separately positioned on the corresponding telescopic unit 8 and can with these telescopic unit 8 synchronization telescopes.
Stretching structure according to present embodiment is provided with protective cover, and corresponding with each telescopic unit 8 of stretching structure by each protecting crust 1 that makes protective cover, thereby can realize being synchronized with the movement of protecting crust 1 and telescopic unit 8, can under the prerequisite of the motion that does not hinder telescopic unit 8 and operation, reduce dust, smear metal and splash etc. to the damage of telescopic unit 8.
Preferably, as shown in Figure 5, each described protecting crust 1 forms the semi-surrounding shape that a side is opened wide.The protecting crust 1 of this semi-surrounding shape more easily is installed on the telescopic unit 8.As required; after the protecting crust 1 with the semi-surrounding shape is installed on the telescopic unit 8; can also seal the uncovered of protecting crust 1 one sides by shrouding; to form integral body as the protective cover of tubulose; the protecting crust 1 of this structure is applicable to rotatable machinery, for example, and in operation can be along the telescopic jib of axis direction rotation; the protective cover of this tubulose can be so that when the telescopic jib rotation was extremely arbitrarily angled, protective cover can play a protective role to telescopic unit 8.
Wherein, each described protecting crust 1 can be along the open at both ends of the flexible direction (being the left and right directions shown in Fig. 1 or Fig. 4) of described protective cover, and the protecting crust of this structure is applicable to the engineering machinery such as telescopic jib such as mixed earth spraying machine.
In addition, as a kind of preferred embodiment, be provided with slide-and-guide section 2 between two described protecting crusts 1 adjacent one another are, so that protecting crust 1 is played guide effect along the moving of flexible direction of this protective cover.
It will be appreciated by those skilled in the art that, this slide-and-guide section 2 can be set to suitable arbitrarily form, for example can groove be set a protecting crust 1 in two adjacent protecting crusts 1, and in the position of the correspondence of another protecting crust 1 protuberance that matches with this groove be set.Because in order to reduce the weight of protective cover, protecting crust 1 is preferably formed by thin plate usually, be unsuitable at protecting crust 1 groove being set, therefore as a kind of preferred embodiment, slide-and-guide section 2 comprises slide block 4 and guide rail 5, slide block 4 and guide rail 5 are separately positioned on the relative surface of two adjacent protecting crusts 1 and are fitted to each other, guide rail 5 and slide block 4 can be set to suitable arbitrarily form, a kind of embodiment of guide rail 5 and slide block 4 is provided among Fig. 6, the guide rail 5 of this nested type and slide block 4 more are conducive to guiding and the location of protecting crust 1, guarantee that protecting crust 1 only moves along flexible direction.
And, preferably, being provided with support portion 3 between two protecting crusts adjacent one another are 1, this support portion 3 is fixed therein on the surface of a protecting crust 1.The arranging can make between guide rail 5 and the slide block 4 and between two adjacent protecting crusts 1 of support portion 3 has certain slit, thereby the friction when being conducive to reduce guide rail 5 and slide block 4 and adjacent two protecting crust 1 relative motions reduces the wearing and tearing of guide rail 5, slide block 4 and protecting crust 1.
Support portion 3 can be set to any suitable form, for example, and the strip shown in Fig. 5; Support portion 3 can be formed by any suitable material, for example, the metal material such as Q235 and Q345, at this moment, support portion 3 can be fixed in two adjacent protecting crusts 1 one by modes such as riveted joint, welding or thread connection, and more preferably, support portion 3 adopts the less TMC nylon of friction factor to make, at this moment, support portion 3 can be fixed in two adjacent protecting crusts 1 one by modes such as riveted joint, splicing or thread connection.
The quantity of support portion 3 and arrangement form can be decided according to the concrete condition of protecting crust 1, preferably, are furnished with symmetrically respectively support portion 3 in the both sides of each slide-and-guide section 2.This mode can strengthen structural stability and the balance of whole protective cover, and is conducive to keep slit between guide rail 5 and the slide block 4, reduces the friction of guide rail 5 and slide block 4.
In addition, install for convenient, each telescopic unit 8 can have bracing frame 9, and each protecting crust 1 is installed on the corresponding telescopic unit 8 by this bracing frame 9.
Preferably, the front end of direction (be the prolonging direction of stretching structure, for example from left to right direction among Fig. 1 to Fig. 4) is stretched out on the edge that bracing frame 9 is arranged on each telescopic unit 8, thereby makes bracing frame 9 can not hinder the stretching motion of telescopic unit 8.
Described stretching structure can be the stretching structure commonly used in the engineering machinery, and for example, this stretching structure can be for the telescopic jib of concrete sprayer, as shown in Fig. 1 to Fig. 6.
Usually, telescopic jib can be controlled the flexible of telescopic unit 8 by telescopic oil cylinder 6, when telescopic oil cylinder 6 is external, namely as shown in Figure 3, on one side surface of telescopic jib telescopic oil cylinder 6 is installed, correspondence one side of protective cover can be formed be used to the space 7(that holds this telescopic oil cylinder referring to Fig. 5), wherein, preferably, protecting crust 1 is configured such that the cross section in space 7 is polygon, as shown in Figure 5 trapezoidal, the intensity of the protecting crust 1 that arranges like this is better and be the compact conformation of this protective cover.
Particularly, referring to Fig. 3, in this embodiment, telescopic oil cylinder 6 is arranged on the upside of this telescopic jib, and telescopic oil cylinder 6 stretches out direction on the edge of each telescopic unit 8 front end place is provided with otic placode, telescopic oil cylinder 6 is fixed on the telescopic unit 8 by this otic placode, and bracing frame 9 can be set directly on this otic placode.When telescopic oil cylinder 6 control telescopic units 8 stretching motion, drive simultaneously the protecting crust 1 that is connected with this telescopic unit 8 by bracing frame 9 and be synchronized with the movement.Telescopic jib according to the concrete sprayer of utility model, owing to being provided with protective cover, therefore, in the process of sprayed mortar, the concrete that can prevent resilience drops on the telescopic unit 8 of this telescopic jib, avoids because concrete occurs in the fault that telescopic unit 8 solidifies the telescopic jib clamping stagnation that causes, simultaneously, the concrete that effectively prevents resilience drops on the telescopic oil cylinder 6, avoids affecting because of concrete functional performance and the life-span of oil cylinder 6.
For easy clearly purpose; below only describe preferred embodiment of the present utility model in detail as an example of the telescopic jib of concrete sprayer example by reference to the accompanying drawings; but; should be understood that; stretching structure of the present utility model is not limited in the telescopic jib of concrete sprayer; and; the utility model is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the utility model is to the no longer separately explanation of various possible combinations.
In addition, also can carry out any combination between the various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (11)
1. stretching structure, this stretching structure comprise relative to each other can stretching motion a plurality of telescopic units (8), it is characterized in that, this stretching structure is provided with protective cover, this protective cover comprise relative to each other can stretching motion a plurality of protecting crusts (1), each protecting crust (1) be separately positioned on corresponding telescopic unit (8) upper and can with this telescopic unit (8) synchronization telescope.
2. stretching structure according to claim 1 is characterized in that, each described protecting crust (1) forms the semi-surrounding shape that a side is opened wide.
3. stretching structure according to claim 2 is characterized in that, each described protecting crust (1) is along the open at both ends of the flexible direction of described protective cover.
4. stretching structure according to claim 1 is characterized in that, is provided with slide-and-guide section (2) between two described protecting crusts (1) adjacent one another are.
5. stretching structure according to claim 4, it is characterized in that, described slide-and-guide section (2) comprises slide block (4) and guide rail (5), and described slide block (4) and described guide rail (5) are separately positioned on the relative surface of two adjacent described protecting crusts (1) and are fitted to each other.
6. stretching structure according to claim 4 is characterized in that, is provided with support portion (3) between two described protecting crusts (1) adjacent one another are, and this support portion (3) are fixed therein on the surface of a protecting crust (1).
7. stretching structure according to claim 6 is characterized in that, is furnished with symmetrically respectively described support portion (3) in the both sides of each described slide-and-guide section (2).
8. stretching structure according to claim 3 is characterized in that, each described telescopic unit (8) has bracing frame (9), and each described protecting crust (1) is installed on the corresponding telescopic unit (8) by this bracing frame (9).
9. stretching structure according to claim 8 is characterized in that, support frame as described above (9) is arranged on the edge of each described telescopic unit (8) and stretches out the front end of direction.
10. the described stretching structure of any one is characterized in that according to claim 1-9, and described stretching structure is the telescopic jib of concrete sprayer.
11. stretching structure according to claim 10 is characterized in that, on telescopic unit (8) one side surfaces of described telescopic jib telescopic oil cylinder (6) is installed, correspondence one side of described protective cover is formed be used to the space that holds this telescopic oil cylinder (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398997 CN202755981U (en) | 2012-08-13 | 2012-08-13 | Retractable structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398997 CN202755981U (en) | 2012-08-13 | 2012-08-13 | Retractable structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202755981U true CN202755981U (en) | 2013-02-27 |
Family
ID=47735168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220398997 Expired - Lifetime CN202755981U (en) | 2012-08-13 | 2012-08-13 | Retractable structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202755981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510967A (en) * | 2013-10-12 | 2014-01-15 | 中联重科股份有限公司 | Telescopic boom and concrete sprayer |
| CN104863618A (en) * | 2015-06-11 | 2015-08-26 | 中国铁建重工集团有限公司 | Small concrete sprayer |
-
2012
- 2012-08-13 CN CN 201220398997 patent/CN202755981U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510967A (en) * | 2013-10-12 | 2014-01-15 | 中联重科股份有限公司 | Telescopic boom and concrete sprayer |
| CN103510967B (en) * | 2013-10-12 | 2015-12-23 | 中联重科股份有限公司 | Telescopic jib and concrete sprayer |
| CN104863618A (en) * | 2015-06-11 | 2015-08-26 | 中国铁建重工集团有限公司 | Small concrete sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
|
| CX01 | Expiry of patent term |