CN103398040B - Concrete mixer, front leg strut assembly and three grades of cylinder apparatus thereof - Google Patents
Concrete mixer, front leg strut assembly and three grades of cylinder apparatus thereof Download PDFInfo
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- CN103398040B CN103398040B CN201310359189.9A CN201310359189A CN103398040B CN 103398040 B CN103398040 B CN 103398040B CN 201310359189 A CN201310359189 A CN 201310359189A CN 103398040 B CN103398040 B CN 103398040B
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Abstract
The invention discloses a kind of three grades of cylinder apparatus, its one-level oil cylinder runs through the first drainback passage having connection oil return opening and rodless cavity, two-level oil cylinder runs through the second drainback passage having connection oil return opening and rodless cavity, three grades of oil cylinders run through the 3rd drainback passage having connection oil return opening and rodless cavity, and is sequentially communicated between the first drainback passage, the second drainback passage and the 3rd drainback passage.First drainback passage, the second drainback passage and the 3rd drainback passage can provide auxiliary reflux effect when described three grades of cylinder apparatus load are excessive, improve in-oil cylinder fluid reflux rate at different levels, help the timely off-load of oil cylinder at different levels, avoid the cylinder structure caused because load is excessive to impact and noise and oil cylinder damage, the off-load buffer capacity making described three grades of cylinder apparatus improves accordingly, service life extends accordingly, and its stretching, extension efficiency is higher.The invention also discloses a kind of front leg strut assembly applying above-mentioned three grades of cylinder apparatus and apply the concrete mixer of this front leg strut assembly.
Description
Technical field
The present invention relates to concrete mixer technical field, particularly to a kind of three grades of cylinder apparatus and the front leg strut assembly applying these three grades of cylinder apparatus.The invention still further relates to the concrete mixer of this front leg strut assembly of a kind of application.
Background technology
Concrete mixer is a kind of special-purpose vehicle for concrete construction, its front leg strut is generally telescopic structure, and generally need to adopt three grades of cylinder apparatus to meet its working condition requirement, along with improving constantly of working strength, the service behaviour of three grades of cylinder apparatus is also increasingly subject to the extensive concern of people.
In current existing concrete mixer work process, when operation intensity is bigger, easily form bigger shock loading at the oil cylinder stroke terminal of its three grades of cylinder apparatus, and owing to the basic off-load oil return buffer capacity of its three grades of cylinder apparatus is poor, cannot by the excessive timely removal of load, thus very easily causing cylinder body to shake and produce noise, and then causing front leg strut assembly overall jitter, adversely affecting to whole operation process；Meanwhile, long-term top load high intensity is worked continuously and is very easily caused that oil cylinder damages, and makes shorten accordingly the service life of front leg strut assembly and three grades of cylinder apparatus thereof, and then causes that car load operational security and stability are substantially reduced；Further, since the oil return speed of existing three grades of cylinder apparatus is relatively low, the time needed for causing the overall stretching process of front leg strut assembly is longer, stretches inefficiency.
Therefore, how to improve the off-load buffer capacity of three grades of cylinder apparatus and stretch efficiency, and to extend its service life be the important technological problems that those skilled in the art are presently required solution.
Summary of the invention
It is an object of the invention to provide a kind of three grades of cylinder apparatus, the off-load buffer capacity of these three grades of cylinder apparatus is relatively strong, stretches efficiency higher, and its service life is longer, and the present invention also provides for the front leg strut assembly of these three grades of cylinder apparatus of a kind of application.It is a further object of the present invention to provide a kind of concrete mixer applying above-mentioned front leg strut assembly.
For solving above-mentioned technical problem, the present invention provides a kind of three grades of cylinder apparatus, including from the outer extremely interior cylinder barrel being sequentially coaxially set with, one-level oil cylinder, two-level oil cylinder and three grades of oil cylinders, the top ends of described three grades of oil cylinders has the oil-in being connected with oil pump and the oil return opening being connected with fuel tank, the bottom of described three grades of oil cylinders is connected to the piston matched respectively with described one-level oil cylinder and described two-level oil cylinder, the bottom inner portion of described cylinder barrel forms the rodless cavity matched with described piston, it is communicated with oil inlet passage between described rodless cavity and described oil-in, and described oil inlet passage sequentially passes through described three grades of oil cylinders and described piston, described one-level oil cylinder runs through and has the first drainback passage connecting described oil return opening and described rodless cavity, described two-level oil cylinder runs through and has the second drainback passage connecting described oil return opening and described rodless cavity, described three grades of oil cylinders run through and has the 3rd drainback passage connecting described oil return opening and described rodless cavity, and described first drainback passage, it is sequentially communicated between described second drainback passage and described 3rd drainback passage.
Preferably, described first drainback passage at least two, and each described first drainback passage is uniform successively along the circumference of described one-level oil cylinder.
Preferably, described second drainback passage at least two, and each described second drainback passage is uniform successively along the circumference of described two-level oil cylinder.
Preferably, described 3rd drainback passage at least two, and each described 3rd drainback passage is uniform successively along the circumference of described three grades of oil cylinders.
The present invention also provides for a kind of front leg strut assembly, including frame, described frame is provided with three grades of cylinder apparatus, and described three grades of cylinder apparatus are specially three grades of cylinder apparatus as described in above-mentioned any one.
The present invention also provides for a kind of concrete mixer, including car body, described car body is provided with front leg strut assembly, and described front leg strut assembly is specially the front leg strut assembly as described in the next item up.
Relatively above-mentioned background technology, three grades of cylinder apparatus provided by the present invention, including from the outer extremely interior cylinder barrel being sequentially coaxially set with, one-level oil cylinder, two-level oil cylinder and three grades of oil cylinders, the top ends of described three grades of oil cylinders has the oil-in being connected with oil pump and the oil return opening being connected with fuel tank, the bottom of described three grades of oil cylinders is connected to the piston matched respectively with described one-level oil cylinder and described two-level oil cylinder, the bottom inner portion of described cylinder barrel forms the rodless cavity matched with described piston, it is communicated with oil inlet passage between described rodless cavity and described oil-in, and described oil inlet passage sequentially passes through described three grades of oil cylinders and described piston, described one-level oil cylinder runs through and has the first drainback passage connecting described oil return opening and described rodless cavity, described two-level oil cylinder runs through and has the second drainback passage connecting described oil return opening and described rodless cavity, described three grades of oil cylinders run through and has the 3rd drainback passage connecting described oil return opening and described rodless cavity, and described first drainback passage, it is sequentially communicated between described second drainback passage and described 3rd drainback passage.In work process, when in described one-level oil cylinder stretching process, load is excessive, excessive fluid can be back in external fuel tank via described first drainback passage and described oil return opening；When in described two-level oil cylinder stretching process, load is excessive, excessive fluid can be back in external fuel tank via described second drainback passage and described oil return opening；When in described three grades of oil cylinder stretching processes, load is excessive, excessive fluid can be back in external fuel tank via described 3rd drainback passage and described oil return opening.Described first drainback passage, described second drainback passage and described 3rd drainback passage can provide auxiliary reflux effect when described three grades of cylinder apparatus load are excessive, improve in-oil cylinder fluid reflux rate at different levels, help the timely off-load of oil cylinder at different levels, impact and noise thus effectively prevent the cylinder structure caused because load is excessive, and avoid oil cylinder damage, and then make the off-load buffer capacity of described three grades of cylinder apparatus be able to corresponding raising, and make extend accordingly its service life, simultaneously, higher fluid reflux rate also makes the rate of stretch of described three grades of cylinder apparatus and front leg strut assembly faster, stretch in hgher efficiency.
In another preferred version of the present invention, described first drainback passage at least two, and each described first drainback passage is uniform successively along the circumference of described one-level oil cylinder.There is described first drainback passage of this kind of multiple uniform arrangement forms and can improve off-load buffering efficiency and the off-load stability thereof of described one-level oil cylinder further, and make the overall off-load buffering course of described three grades of cylinder apparatus more steadily efficiently.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The assembling structure sectional view of three grades of cylinder apparatus that Fig. 1 provides for a kind of detailed description of the invention of the present invention.
Detailed description of the invention
The core of the present invention is to provide a kind of three grades of cylinder apparatus, and the off-load buffer capacity of these three grades of cylinder apparatus is relatively strong, stretches efficiency higher, and its service life is longer；Also provide for a kind of front leg strut assembly applying above-mentioned three grades of cylinder apparatus；Simultaneously, it is provided that a kind of concrete mixer applying above-mentioned front leg strut assembly.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Refer to the assembling structure sectional view of three grades of cylinder apparatus that Fig. 1, Fig. 1 provide for a kind of detailed description of the invention of the present invention.
In a specific embodiment, three grades of cylinder apparatus provided by the present invention, including from the outer extremely interior cylinder barrel 11 being sequentially coaxially set with, one-level oil cylinder 12, two-level oil cylinder 13 and three grades of oil cylinders 14, the top ends of three grades of oil cylinders 14 has the oil-in 141 being connected with oil pump and the oil return opening 142 being connected with fuel tank, the bottom of three grades of oil cylinders 14 is connected to the piston 15 matched respectively with one-level oil cylinder 12 and two-level oil cylinder 13, the bottom inner portion of cylinder barrel 11 forms the rodless cavity 111 matched with piston 15, oil inlet passage 16 it is communicated with between rodless cavity 111 and oil-in 141, and oil inlet passage 16 sequentially passes through three grades of oil cylinders 14 and piston 15, one-level oil cylinder 12 runs through the first drainback passage 121 having connection oil return opening 142 and rodless cavity 111, two-level oil cylinder 13 runs through the second drainback passage 131 having connection oil return opening 142 and rodless cavity 111, three grades of oil cylinders 14 run through the 3rd drainback passage 143 having connection oil return opening 142 and rodless cavity 111, and first drainback passage 121, it is sequentially communicated between the second drainback passage 131 and the 3rd drainback passage 143.In work process, when in one-level oil cylinder 12 stretching process, load is excessive, excessive fluid can be back in external fuel tank via the first drainback passage 121 and oil return opening 142；When in two-level oil cylinder 13 stretching process, load is excessive, excessive fluid can be back in external fuel tank via the second drainback passage 131 and oil return opening 142；When in three grades of oil cylinder 14 stretching processes, load is excessive, excessive fluid can be back in external fuel tank via the 3rd drainback passage 143 and oil return opening 142.First drainback passage 121, second drainback passage 131 and the 3rd drainback passage 143 can provide auxiliary reflux effect when described three grades of cylinder apparatus load are excessive, improve in-oil cylinder fluid reflux rate at different levels, help the timely off-load of oil cylinder at different levels, impact and noise thus effectively prevent the cylinder structure caused because load is excessive, and avoid oil cylinder damage, and then make the off-load buffer capacity of described three grades of cylinder apparatus be able to corresponding raising, and make extend accordingly its service life, simultaneously, higher fluid reflux rate also makes the rate of stretch of described three grades of cylinder apparatus and front leg strut assembly faster, stretch in hgher efficiency.
Further, the first drainback passage 121 at least two, and each first drainback passage 121 is uniform successively along the circumference of one-level oil cylinder 12.There is the first drainback passage 121 of this kind of multiple uniform arrangement forms and can improve off-load buffering efficiency and the off-load stability thereof of one-level oil cylinder 12 further, and make the overall off-load buffering course of described three grades of cylinder apparatus more steadily efficiently.
More specifically, the second drainback passage 131 at least two, and each second drainback passage 131 is uniform successively along the circumference of two-level oil cylinder 13.There is the second drainback passage 131 of this kind of multiple uniform arrangement forms and can improve off-load buffering efficiency and the off-load stability thereof of two-level oil cylinder 13 further, and make the overall off-load buffering course of described three grades of cylinder apparatus more steadily efficiently.
On the other hand, the 3rd drainback passage 143 at least two, and each 3rd drainback passage 143 is uniform successively along the circumference of three grades of oil cylinders 14.There is the 3rd drainback passage 143 of this kind of multiple uniform arrangement forms and can improve off-load buffering efficiency and the off-load stability thereof of three grades of oil cylinders 14 further, and make the overall off-load buffering course of described three grades of cylinder apparatus more steadily efficiently.
In a specific embodiment, front leg strut assembly provided by the present invention, including frame, described frame is provided with three grades of cylinder apparatus, described three grades of cylinder apparatus are specially three grades of cylinder apparatus as described in each embodiment above.The service life of described front leg strut assembly is longer.
In a specific embodiment, concrete mixer provided by the present invention, including car body, described car body is provided with front leg strut assembly, described front leg strut assembly is specially the front leg strut assembly as described in foregoing embodiments.The service life of this concrete mixer is longer.
In summary, the three grades of cylinder apparatus provided in the present invention, including from the outer extremely interior cylinder barrel being sequentially coaxially set with, one-level oil cylinder, two-level oil cylinder and three grades of oil cylinders, the top ends of described three grades of oil cylinders has the oil-in being connected with oil pump and the oil return opening being connected with fuel tank, the bottom of described three grades of oil cylinders is connected to the piston matched respectively with described one-level oil cylinder and described two-level oil cylinder, the bottom inner portion of described cylinder barrel forms the rodless cavity matched with described piston, it is communicated with oil inlet passage between described rodless cavity and described oil-in, and described oil inlet passage sequentially passes through described three grades of oil cylinders and described piston, described one-level oil cylinder runs through and has the first drainback passage connecting described oil return opening and described rodless cavity, described two-level oil cylinder runs through and has the second drainback passage connecting described oil return opening and described rodless cavity, described three grades of oil cylinders run through and has the 3rd drainback passage connecting described oil return opening and described rodless cavity, and described first drainback passage, it is sequentially communicated between described second drainback passage and described 3rd drainback passage.In work process, when in described one-level oil cylinder stretching process, load is excessive, excessive fluid can be back in external fuel tank via described first drainback passage and described oil return opening；When in described two-level oil cylinder stretching process, load is excessive, excessive fluid can be back in external fuel tank via described second drainback passage and described oil return opening；When in described three grades of oil cylinder stretching processes, load is excessive, excessive fluid can be back in external fuel tank via described 3rd drainback passage and described oil return opening.Described first drainback passage, described second drainback passage and described 3rd drainback passage can provide auxiliary reflux effect when described three grades of cylinder apparatus load are excessive, improve in-oil cylinder fluid reflux rate at different levels, help the timely off-load of oil cylinder at different levels, impact and noise thus effectively prevent the cylinder structure caused because load is excessive, and avoid oil cylinder damage, and then make the off-load buffer capacity of described three grades of cylinder apparatus be able to corresponding raising, and make extend accordingly its service life, simultaneously, higher fluid reflux rate also makes the rate of stretch of described three grades of cylinder apparatus and front leg strut assembly faster, stretch in hgher efficiency.
Additionally, the front leg strut assembly of the above-mentioned three grades of cylinder apparatus of application provided by the invention, the service life of this front leg strut assembly is longer, and its rate of stretch is very fast, it is higher to stretch efficiency.
It addition, the concrete mixer of the above-mentioned front leg strut assembly of application provided by the invention, the service life of this concrete mixer is longer, and its work efficiency is higher.
Above to three grades of cylinder apparatus provided by the present invention, apply the front leg strut assembly of these three grades of cylinder apparatus and apply the concrete mixer of this front leg strut assembly and be described in detail.Principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention carries out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (6)
1. three grades of cylinder apparatus, including from the outer extremely interior cylinder barrel being sequentially coaxially set with, one-level oil cylinder, two-level oil cylinder and three grades of oil cylinders, the top ends of described three grades of oil cylinders has the oil-in being connected with oil pump and the oil return opening being connected with fuel tank, the bottom of described three grades of oil cylinders is connected to the piston matched respectively with described one-level oil cylinder and described two-level oil cylinder, the bottom inner portion of described cylinder barrel forms the rodless cavity matched with described piston, it is communicated with oil inlet passage between described rodless cavity and described oil-in, and described oil inlet passage sequentially passes through described three grades of oil cylinders and described piston, it is characterized in that: described one-level oil cylinder runs through and has the first drainback passage for assisting oil return connecting described oil return opening and described rodless cavity, described two-level oil cylinder runs through and has the second drainback passage for assisting oil return connecting described oil return opening and described rodless cavity, described three grades of oil cylinders run through and has the 3rd drainback passage for assisting oil return connecting described oil return opening and described rodless cavity, and described first drainback passage, it is sequentially communicated between described second drainback passage and described 3rd drainback passage.
2. three grades of cylinder apparatus as claimed in claim 1, it is characterised in that: described first drainback passage at least two, and each described first drainback passage is uniform successively along the circumference of described one-level oil cylinder.
3. three grades of cylinder apparatus as claimed in claim 1, it is characterised in that: described second drainback passage at least two, and each described second drainback passage is uniform successively along the circumference of described two-level oil cylinder.
4. three grades of cylinder apparatus as claimed in claim 1, it is characterised in that: described 3rd drainback passage at least two, and each described 3rd drainback passage is uniform successively along the circumference of described three grades of oil cylinders.
5. a front leg strut assembly, including frame, described frame is provided with three grades of cylinder apparatus, it is characterised in that: described three grades of cylinder apparatus are specially three grades of cylinder apparatus as according to any one of Claims 1-4.
6. a concrete mixer, including car body, described car body is provided with front leg strut assembly, it is characterised in that: described front leg strut assembly is specially front leg strut assembly as claimed in claim 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310359189.9A CN103398040B (en) | 2013-08-16 | 2013-08-16 | Concrete mixer, front leg strut assembly and three grades of cylinder apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310359189.9A CN103398040B (en) | 2013-08-16 | 2013-08-16 | Concrete mixer, front leg strut assembly and three grades of cylinder apparatus thereof |
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| CN103398040A CN103398040A (en) | 2013-11-20 |
| CN103398040B true CN103398040B (en) | 2016-06-29 |
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| CN115419632B (en) * | 2022-11-07 | 2023-02-03 | 烟台星辉航空液压有限公司 | Double-acting three-stage oil cylinder with multiple oil pipes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5962703A (en) * | 1982-09-29 | 1984-04-10 | Shin Meiwa Ind Co Ltd | Multi-reciprocating multi-stage oil-pressure cylinder |
| JP2002070809A (en) * | 2000-08-30 | 2002-03-08 | Komatsu Ltd | Double-acting multistage cylinder |
| DE202007002115U1 (en) * | 2006-12-30 | 2007-05-31 | Sany Heavy Industry Co., Ltd. | Concrete pump vehicle e.g. support arrangement for concrete pump vehicle, has axis of rotation of front supporting legs which are arranged near rotating mechanism |
| CN202280689U (en) * | 2011-10-31 | 2012-06-20 | 湖南特力液压有限公司 | Multistage hydraulic cylinder |
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