CN220435135U - Sequential telescopic serial oil cylinder with concentric core tube at cylinder bottom - Google Patents
Sequential telescopic serial oil cylinder with concentric core tube at cylinder bottom Download PDFInfo
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- CN220435135U CN220435135U CN202321842537.3U CN202321842537U CN220435135U CN 220435135 U CN220435135 U CN 220435135U CN 202321842537 U CN202321842537 U CN 202321842537U CN 220435135 U CN220435135 U CN 220435135U
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- 239000003921 oil Substances 0.000 description 194
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- 230000009471 action Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
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Abstract
The utility model discloses a sequential telescopic serial oil cylinder with concentric core tubes at cylinder bottoms, which relates to the technical field of serial oil cylinders and comprises three cylinder bottoms, cylinder barrels, an inner core tube I, an inner core tube II, an inner core tube III and an inner core tube IV. The sequential telescopic serial oil cylinders with the concentric core tubes at the cylinder bottoms can be sequentially extended and sequentially retracted when the multiple sections of oil cylinders are connected in series, the controllability is high, and the four inner core tubes are concentrically arranged, so that the telescopic cylinders are stable.
Description
Technical Field
The utility model relates to the technical field of serial oil cylinders, in particular to a sequential telescopic serial oil cylinder with a cylinder bottom concentric core tube.
Background
At present, all the crane is provided with a telescopic boom for lifting, the telescopic boom is provided with a plurality of sections of telescopic booms, the telescopic boom can be telescopic by adopting a mode of connecting a plurality of sections of oil cylinders in series, but the telescopic boom connected with the plurality of sections of oil cylinders in series can have the problems that the telescopic booms can not extend out in sequence and can not retract in sequence, and the orderly control of the telescopic booms is affected.
Disclosure of Invention
The utility model aims to overcome the existing defects, and provides the sequential telescopic serial oil cylinder with the concentric core tubes at the cylinder bottom, which can be sequentially extended and sequentially retracted when a plurality of sections of oil cylinders are connected in series, and the four inner core tubes are concentrically arranged, so that the telescopic serial oil cylinder is high in controllability and stable in telescopic performance, and can effectively solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the sequential telescopic serial oil cylinder with the concentric core tubes at the cylinder bottom comprises a cylinder bottom, a cylinder barrel, an inner core tube I, an inner core tube II, an inner core tube III and an inner core tube IV;
the cylinder barrel is provided with three cylinders, the left end of each cylinder barrel is provided with a cylinder bottom, each cylinder barrel is internally and respectively connected with a piston in a sliding manner, the right side of each piston is fixedly connected with the left end of a hollow piston rod, the right end of each piston rod is fixedly connected with the head of the piston rod, the left end of each piston rod is provided with a piston rod oil hole, and the piston rod oil holes are communicated with the rod cavity of the cylinder barrel and the inside of the piston rod;
the left end of the first inner core tube and the left end of the third inner core tube are respectively and fixedly connected to the right middle part of each cylinder bottom, the first inner core tube is positioned in the middle part of the third inner core tube, a stroke tail end oil through hole is formed in the side face of the right end of the third inner core tube, the right end of the second inner core tube and the right end of the fourth inner core tube are respectively and fixedly connected to the left middle part of the head of each piston rod, the fourth inner core tube is positioned in the piston rod, the second inner core tube is positioned in the middle part of the fourth inner core tube, the left end of the fourth inner core tube penetrates through the through hole in the middle of the piston, the inner side of the fourth inner core tube is transversely and slidably connected with the outer side of the right end of the third inner core tube, and the inner side of the second inner core tube is matched with the outer side of the right end of the first inner core tube;
the middle part of every cylinder end is provided with the oil duct I of the interior left end of intercommunication inside core pipe I respectively, still is provided with the oil duct II of the interior three left ends of intercommunication inside core pipe on every cylinder end, install the cylinder end check valve in the oil duct II, and still be provided with the oil duct III in the intercommunication cylinder in the dead lever chamber on every cylinder end, the outer end of oil duct II and oil duct III merges.
Further, an oil way I and an oil way II are respectively inserted in the head part of each piston rod, one end of the oil way I is communicated with the oil cavity on the inner side of the piston rod and the oil cavity on the outer side of the inner core pipe II, one end of the oil way II is communicated with the inner right end of the inner core pipe II, the other end of the oil way I on the head part of the first piston rod is connected with the other end of the oil way II on the head part of the first piston rod through a one-way valve controlled by a first travel switch, the other end of the oil way I on the head part of the second piston rod is connected with the other end of the oil way II on the head part of the second piston rod through a one-way valve controlled by a second travel switch, and the other end of the oil way I on the head part of the third piston rod is connected with the other end of the oil way II on the head part of the third piston rod.
Further, the middle part of the oil way II on the head part of the first piston rod is connected with one end of a first oil way IV, the other end of the first oil way IV is connected with an oil way I in the second cylinder bottom, the right end of the first inner core tube IV is connected with one end of the first oil way III, and the other end of the first oil way III is connected with the junction of the oil way II and the oil way III in the second cylinder bottom;
the middle part of the oil way II on the head part of the second piston rod is connected with one end of a second oil way IV, the other end of the second oil way IV is connected with the oil way I in the third cylinder bottom, the right end of the second inner core tube IV is connected with one end of a second oil way III, and the other end of the second oil way III is connected with the junction of the oil way II and the oil way III in the third cylinder bottom.
Further, the top of second piston rod head is provided with first stroke stop device, and first stroke stop device corresponds the setting with first travel switch controlled check valve, and the top of third piston rod head is provided with second stroke stop device, and second stroke stop device corresponds the setting with second travel switch controlled check valve.
Further, one end of the oil duct in the first cylinder bottom is connected with one end of the oil duct five, the junction of the oil duct two and the oil duct three in the first cylinder bottom is connected with one end of the oil duct six, and the other end of the oil duct five and the other end of the oil duct six are respectively connected with two interfaces of the reversing valve.
Compared with the prior art, the utility model has the beneficial effects that: the sequential telescopic serial oil cylinder with the concentric core tubes at the cylinder bottom has the following advantages:
1. when the multiple cylinders are connected in series, the multiple cylinders can sequentially extend and sequentially retract, the controllability is high, the sequential extension can be realized, the first cylinder extends firstly, then the second cylinder and the third cylinder sequentially extend, the sequential retraction can be realized, the third cylinder retracts firstly, then the second cylinder and the first cylinder sequentially retract
2. The controllability is strong, and four inside core pipes are arranged concentrically, and the expansion is stable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a partially enlarged structure of the present utility model;
FIG. 3 is a schematic view of a partial cross-sectional structure of the present utility model.
In the figure: 1 cylinder bottom, 2 cylinder barrel, 3 internal core pipe I, 4 internal core pipe II, 5 cylinder bottom check valve, 6 travel switch control check valve, 7 piston rod, 8 internal core pipe III, 9 internal core pipe IV, 10 travel end oil through hole, 11 oil duct I, 12 oil duct II, 13 oil duct III, 14 piston, 15 piston rod head, 16 oil duct I, 17 oil duct II, 18 oil duct III, 19 oil duct IV, 20 travel stop device, 21 oil duct V, 22 oil duct VI, 23 reversing valve, 24 piston rod oil hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, the present utility model provides the following technical solutions: the sequential telescopic serial oil cylinder with the concentric core tubes of the cylinder bottom comprises a cylinder bottom 1, a cylinder barrel 2, an inner core tube I3, an inner core tube II 4, an inner core tube III 8 and an inner core tube IV 9;
the cylinder barrel 2 is provided with three, and the left end of every cylinder barrel 2 installs the cylinder bottom 1 respectively, and the inside of the hollow piston rod 7 left end of the right side fixedly connected with hollow of every piston 14 of every sliding connection in every cylinder barrel 2, the right-hand member fixedly connected with piston rod head 15 of every piston rod 7, the left end of every piston rod 7 has seted up piston rod oilhole 24, piston rod oilhole 24 intercommunication cylinder barrel 2 has the pole chamber and the piston rod 7 is inside.
The right side middle part of every cylinder bottom 1 is fixed connection inside core pipe one 3's left end and the left end of inside core pipe three 8 respectively, and inside core pipe one 3 is located inside core pipe three 8 middle part, the stroke end oil through hole 10 has been seted up to inside core pipe three 8's right-hand member side, the right-hand member of inside core pipe two 4 of every piston rod head 15 is fixed connection respectively in the left side middle part and the right-hand member of inside core pipe four 9, inside core pipe four 9 is located piston rod 7, and inside core pipe two 4 is located inside four 9 middle parts of inside core pipe, and the left end of inside core pipe four 9 passes piston 14 middle part through-hole, the left end inboard of inside core pipe four 9 and the outside transverse sliding connection of right-hand member outside of inside core pipe three 8, the left end inboard of inside core pipe two 4 and the outside cooperation transverse sliding connection of inside core pipe one 3.
The middle part of every cylinder end 1 is provided with the oil duct I11 of the left end in the inside core pipe I3 of intercommunication respectively, still is provided with the oil duct II 12 of the left end in the inside core pipe III 8 of intercommunication on every cylinder end 1, installs cylinder end check valve 5 in the oil duct II 12, and still is provided with the oil duct III 13 in the intercommunication cylinder barrel 2 in the dead lever chamber on every cylinder end 1, and the outer end of oil duct II 12 and oil duct III 13 merges.
The first oil way 16 and the second oil way 17 are respectively inserted in each piston rod head 15, one end of the first oil way 16 is communicated with an oil cavity on the inner side of the piston rod 7 and the outer side of the inner core pipe IV 9, one end of the second oil way 17 is communicated with the right end of the inner core pipe IV 4, the other end of the first oil way 16 on the first piston rod head 15 is connected with the other end of the second oil way 17 on the first piston rod head 15 through a first travel switch-controlled one-way valve 6, the other end of the first oil way 16 on the second piston rod head 15 is connected with the other end of the second oil way 17 on the second piston rod head 15 through a second travel switch-controlled one-way valve 6, and the other end of the first oil way 16 on the third piston rod head 15 is connected with the other end of the second oil way 17 on the third piston rod head 15.
The middle part of an oil way II 17 on the head part 15 of the first piston rod is connected with one end of a first oil way IV 19, the other end of the first oil way IV 19 is connected with an oil way I11 in the second cylinder bottom 1, the right end of a first inner core tube IV 9 is connected with one end of a first oil way III 18, and the other end of the first oil way III 18 is connected with the junction of the oil way II 12 and the oil way III 13 in the second cylinder bottom 1.
The middle part of an oil way II 17 on the head part 15 of the second piston rod is connected with one end of a second oil way IV 19, the other end of the second oil way IV 19 is connected with an oil way I11 in the third cylinder bottom 1, the right end of a second internal core tube IV 9 is connected with one end of a second oil way III 18, and the other end of the second oil way III 18 is connected with the junction of the oil way II 12 and the oil way III 13 in the third cylinder bottom 1.
The top of second piston rod head 15 is provided with first stroke stop device 20, and first stroke stop device 20 corresponds the check valve 6 of first travel switch control and sets up, and the top of third piston rod head 15 is provided with second stroke stop device 20, and second stroke stop device 20 corresponds the check valve 6 of second travel switch control and sets up.
The end part of the first oil passage 11 in the first cylinder bottom 1 is connected with one end of the oil passage five 21, the junction part of the second oil passage 12 and the third oil passage 13 in the first cylinder bottom 1 is connected with one end of the oil passage six 22, and the other end of the oil passage five 21 and the other end of the oil passage six 22 are respectively connected with two interfaces of the reversing valve 23.
The utility model provides a hydraulic scheme capable of realizing sequential extension (first stage, second stage and third stage) and sequential retraction (third stage, second stage and first stage) under the condition that a plurality of sections of cylinders are connected in series, wherein the scheme is characterized in that two sets of two-layer core tubes are arranged inside the cylinders, the first inner core tube 3 and the third inner core tube 8 are fixed with a cylinder bottom 1, and the second inner core tube 4 and the fourth inner core tube 9 are fixed with a piston rod 7.
The inner core tube III 8 is provided with a stroke end oil through hole 10 at the stroke end of the oil cylinder. The cylinder bottom 1 is internally provided with a cylinder bottom one-way valve 5 and three oil channels. The first oil duct 11 is used as a rod cavity oil way of all the oil cylinders, the second oil duct 12 is provided with a cylinder bottom one-way valve 5 and is used as a rodless cavity oil way of all the oil cylinders, and the third oil duct 13 is communicated with the rodless cavity of the primary oil cylinder.
The interior of the piston rod 7 is provided with three layers of oil channels which respectively correspond to the interior of the rod cavity, the interior core tube IV 9 and the interior core tube II 4 of the primary oil cylinder. The head 15 of the piston rod is provided with a one-way valve 6 controlled by a travel switch, and when the upper-stage oil cylinder is retracted in place, the travel limiting device 20 of the upper-stage oil cylinder opens the one-way valve 6 controlled by the travel switch.
Wherein, the last stage of oil cylinder is not provided with a one-way valve 6 controlled by a travel switch;
in turn, this scheme can increase more serial cylinder numbers.
The cylinder bottom 1, the cylinder barrel 2, the piston rod 7, the piston 14 and the piston rod head 15 form an oil cylinder, a space positioned at the left side of the piston 14 in the cylinder barrel 2 is a rodless cavity, a space positioned at the right side of the piston 14 in the cylinder barrel 2 is called a rod cavity because of the piston rod 7, three oil cylinders are respectively a first oil cylinder, a second oil cylinder and a third oil cylinder from left to right, and the three oil cylinders are respectively called a first-stage oil cylinder, a second-stage oil cylinder and a second-stage oil cylinder from left to right.
The working principle of sequential extension:
when the reversing valve 23 controls the oil cylinder to extend out, high-pressure oil pumped out by the oil pump enters a rodless cavity of the oil cylinder, and an oil passage 11 of the oil cylinder with the rod cavity is communicated with the oil tank;
firstly, all the oil cylinders are in a fully contracted state, pressure oil enters the first-stage oil cylinder through an oil duct III 13, and the first-stage oil cylinder extends out; the second oil duct 12 is provided with a cylinder bottom one-way valve 5, so that pressure oil cannot enter the subsequent oil cylinder through the inner core pipe III 8, the inner core pipe IV 9 and the oil way III 18, and the subsequent oil cylinder cannot extend out;
when the first-stage oil cylinder is completely extended, the stroke end oil through hole 10 of the stroke end of the oil cylinder of the inner core tube III 8 is opened, pressure oil enters the inner core tube IV 9 and the oil way III 18 through the stroke end oil through hole 10, then enters the next-stage oil cylinder through the oil way III 13 of the next-stage oil cylinder, and the next-stage oil cylinder starts to extend;
and by analogy, the sequential extension of the first-stage, second-stage and third-stage oil cylinders is realized. At this time, the hydraulic oil with the rod cavity at the present stage passes through the oil hole 24 of the piston rod, the inside of the piston rod 7 and the oil way I16, then opens the one-way valve 6 controlled by the travel switch, and then returns to the oil tank through the oil way II 17, the inner core pipe II 4, the inner core pipe I3 and the oil way I11, so that the extension of all the oil cylinders is not affected.
When the reversing valve 23 controls the oil cylinder to retract, high-pressure oil pumped by the oil pump enters a rod cavity of the oil cylinder, a rodless cavity of the oil cylinder is led to the oil tank, and at the moment, hydraulic oil in the rodless cavity of the oil cylinder at the later stage can open the cylinder bottom one-way valve 5 through the oil passage II 12 and enter the oil tank, so that the retraction of the oil cylinders at all stages is not influenced.
The high-pressure oil enters the oil passage I11 of all the oil cylinders, so that the check valve 6 controlled by the travel switch is not opened, the high-pressure oil cannot enter the primary oil cylinder, and only the high-pressure oil of the last-stage oil cylinder can enter the rod cavity of the oil cylinder through the oil passage II 17, the oil passage I16, the inside of the piston rod 7 and the piston rod oil hole 24.
When the last-stage oil cylinder is completely retracted, the stroke limiting device 20 opens the one-way valve 6 controlled by the stroke switch of the last-stage oil cylinder, and at this time, high-pressure oil can enter the rod cavity of the last-stage oil cylinder sequentially through the second oil way 17, the one-way valve 6 controlled by the stroke switch, the inside of the piston rod 7 and the piston rod oil hole 24, and the last-stage oil cylinder starts to retract. And so on, to effect sequential retraction from back to front.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The sequential telescopic serial oil cylinder with the concentric core tubes of the cylinder bottom is characterized by comprising a cylinder bottom (1), a cylinder tube (2), an inner core tube I (3), an inner core tube II (4), an inner core tube III (8) and an inner core tube IV (9);
the cylinder barrel (2) is provided with three cylinders, the left end of each cylinder barrel (2) is provided with a cylinder bottom (1) respectively, each cylinder barrel (2) is respectively and slidably connected with a piston (14), the right side of each piston (14) is fixedly connected with the left end of a hollow piston rod (7), the right end of each piston rod (7) is fixedly connected with a piston rod head (15), the left end of each piston rod (7) is provided with a piston rod oil hole (24), and the piston rod oil holes (24) are communicated with a rod cavity of the cylinder barrel (2) and the inside of the piston rod (7);
the left end of the first inner core tube (3) and the left end of the third inner core tube (8) are fixedly connected to the right middle part of each cylinder bottom (1), the first inner core tube (3) is positioned in the middle part of the third inner core tube (8), a stroke tail end oil through hole (10) is formed in the right side surface of the third inner core tube (8), the right end of the second inner core tube (4) and the right end of the fourth inner core tube (9) are fixedly connected to the left middle part of each piston rod head (15), the fourth inner core tube (9) is positioned in the piston rod (7), the second inner core tube (4) is positioned in the middle part of the fourth inner core tube (9), the left end of the fourth inner core tube (9) penetrates through a middle through hole of the piston (14), the inner side of the left end of the fourth inner core tube (9) is transversely connected with the outer side of the right end of the third inner core tube (8), and the inner side of the left end of the second inner core tube (4) is matched with the outer side of the right end of the fourth inner core tube (3) in a transversely sliding mode;
the middle part of every cylinder end (1) is provided with oil duct one (11) of the interior left end of intercommunication inside core pipe one (3) respectively, still is provided with oil duct two (12) of the interior left end of inside core pipe three (8) of intercommunication on every cylinder end (1), install cylinder end check valve (5) in oil duct two (12), and still be provided with on every cylinder end (1) in the intercommunication cylinder (2) no pole chamber oil duct three (13), the outer end of oil duct two (12) and oil duct three (13) merges.
2. The sequential telescopic tandem ram with a cylinder bottom concentric core tube of claim 1, wherein: the oil way I (16) and the oil way II (17) are respectively inserted into each piston rod head (15), one end of the oil way I (16) is communicated with an oil cavity on the inner side of the piston rod (7) and the outer side of the inner core pipe IV (9), one end of the oil way II (17) is communicated with the inner right end of the inner core pipe II (4), the other end of the oil way I (16) on the first piston rod head (15) is connected with the other end of the oil way II (17) on the first piston rod head (15) through a one-way valve (6) controlled by a first travel switch, the other end of the oil way I (16) on the second piston rod head (15) is connected with the other end of the oil way II (17) on the second piston rod head (15) through a one-way valve (6) controlled by a second travel switch, and the other end of the oil way I (16) on the third piston rod head (15) is connected with the other end of the oil way II (17) on the third piston rod head (15).
3. The sequential telescopic tandem ram with a cylinder bottom concentric core tube of claim 2, wherein: the middle part of an oil way II (17) on the head part (15) of the first piston rod is connected with one end of a first oil way IV (19), the other end of the first oil way IV (19) is connected with an oil way I (11) in the second cylinder bottom (1), the right end of a first inner core tube IV (9) is connected with one end of a first oil way III (18), and the other end of the first oil way III (18) is connected with the junction of the oil way II (12) and the oil way III (13) in the second cylinder bottom (1);
one end of a second oil way IV (19) is connected to the middle part of an oil way II (17) on the head part (15) of the second piston rod, the other end of the second oil way IV (19) is connected with an oil way I (11) in a third cylinder bottom (1), the right end of a second inner core tube IV (9) is connected with one end of a second oil way III (18), and the other end of the second oil way III (18) is connected with the junction of the oil way II (12) and the oil way III (13) in the third cylinder bottom (1).
4. The sequential telescopic tandem ram with a cylinder bottom concentric core tube of claim 2, wherein: the top of second piston rod head (15) is provided with first stroke stop device (20), and first stroke stop device (20) correspond setting with first travel switch controlled check valve (6), and the top of third piston rod head (15) is provided with second stroke stop device (20), and second stroke stop device (20) correspond setting with second travel switch controlled check valve (6).
5. The sequential telescopic tandem ram with a cylinder bottom concentric core tube of claim 1, wherein: the end part of an oil passage I (11) in the first cylinder bottom (1) is connected with one end of an oil passage V (21), the junction of an oil passage II (12) and an oil passage III (13) in the first cylinder bottom (1) is connected with one end of an oil passage VI (22), and the other end of the oil passage V (21) and the other end of the oil passage VI (22) are respectively connected with two interfaces of a reversing valve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321842537.3U CN220435135U (en) | 2023-07-13 | 2023-07-13 | Sequential telescopic serial oil cylinder with concentric core tube at cylinder bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321842537.3U CN220435135U (en) | 2023-07-13 | 2023-07-13 | Sequential telescopic serial oil cylinder with concentric core tube at cylinder bottom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220435135U true CN220435135U (en) | 2024-02-02 |
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ID=89693235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321842537.3U Active CN220435135U (en) | 2023-07-13 | 2023-07-13 | Sequential telescopic serial oil cylinder with concentric core tube at cylinder bottom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220435135U (en) |
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2023
- 2023-07-13 CN CN202321842537.3U patent/CN220435135U/en active Active
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