CN211174832U - Two-step type pressure boosting oil cylinder - Google Patents
Two-step type pressure boosting oil cylinder Download PDFInfo
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- CN211174832U CN211174832U CN201921258092.8U CN201921258092U CN211174832U CN 211174832 U CN211174832 U CN 211174832U CN 201921258092 U CN201921258092 U CN 201921258092U CN 211174832 U CN211174832 U CN 211174832U
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Abstract
The utility model provides a double-step type supercharging oil cylinder, which comprises a first piston rod assembly and a second piston rod assembly which are arranged in a cylinder barrel; first piston rod subassembly includes a first piston and a first piston rod, second piston subassembly includes a second piston and a second piston rod, thereby well pressure oil warp thereby well pressure hydraulic fluid port gets into this well pressure oil pocket and promotes this first piston and promote this first piston rod and stretch out a predetermined stroke after, high-pressure oil certainly high-pressure hydraulic fluid port input high-pressure oil pocket promotes thereby this second piston promotes the second piston rod well pressure oil in the well pressure oil pocket reaches first piston rod subassembly is whole to be advanced, and then first piston rod stretches out a predetermined stroke of second once more, back pressure oil warp back pressure hydraulic fluid port gets into the back pressure oil pocket is used for realizing first predetermined stroke with the resetting of the predetermined stroke of second, the utility model discloses utilize the incompressible characteristic energy transfer of oil, reduced the whole energy consumption of hydro-cylinder, improved stability.
Description
Technical Field
The utility model relates to a pneumatic cylinder technical field especially relates to a two-step pressure boost oil cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The element is widely applied to various fields, for example, in the field of packaging machinery and equipment, when a container needs to be sealed, a cap maker type machine is generally required, and a core power component of the cap maker type machine is a hydraulic cylinder.
The cap making machine comprises a rotary compression molding cap making machine, an oil cylinder can be applied to the rotary compression molding cap making machine to drive a compression molding die to open and close, and the number of the oil cylinders used by different cap making machine types is different (for example, 24 oil cylinders are used for 24 cavity type caps). However, when the yield, the model and the stroke of the oil cylinder are all fixed, the oil consumption of the hydraulic system is mainly determined by the self oil consumption volume of the oil cylinder. When the pressure is fixed, the oil consumption directly determines the power of the hydraulic system, that is, the oil consumption of the oil cylinder is in direct proportion to the power of the hydraulic system.
In addition: when the whole equipment runs, the back pressure of the oil cylinder in the hydraulic system exists all the time, the rising of the oil cylinder needs to overcome the back pressure, the friction force of the oil cylinder and the gravity, and the source of the back pressure is the branch of the medium pressure, so the back pressure cannot be larger than the medium pressure. If the medium pressure is equal to the back pressure, the area ratio of the upper part and the lower part of the oil cylinder at the moment directly determines the magnitude of the pressure difference. At the moment, the pressure difference only needs to overcome the friction force of the oil cylinder and the gravity of the oil cylinder to rise, and the friction force and the gravity of the oil cylinder are very small and can be ignored. That is, when the additional condition is satisfied (under the additional condition S: Sopper ≧ 1.3: 1), the smaller the top-to-bottom area ratio of the cylinder, the more stable it is.
Based on this, in the prior art, there are general disadvantages:
1) the oil cylinder is too large in plug product design and long in piston stroke, so that the oil consumption of the oil cylinder is large, and the energy consumption is high.
) The area ratio of the upper part and the lower part of the oil cylinder is overlarge, so that the upper part and the lower part of the oil cylinder have larger pressure difference during operation, and the integral stability of the oil cylinder is poor indirectly.
) The oil cylinder has overlarge pressure in a high-pressure state, so that the conditions of high energy consumption and waste are caused.
SUMMERY OF THE UTILITY MODEL
In view of the above circumstances, the utility model provides a two-step pressure boost oil cylinder can reduce the oil mass of hydro-cylinder, promote the stability of hydro-cylinder and reduce the pressure of hydro-cylinder when high pressure state, the energy saving consumed.
To achieve the purpose, the utility model provides a double-step boosting oil cylinder, which comprises a cylinder barrel, a front cylinder cover arranged at one end of the cylinder barrel and a rear cylinder cover arranged at one end of the cylinder barrel, which is far away from the front cylinder cover, wherein the double-step boosting oil cylinder also comprises a first piston rod component and a second piston rod component which are arranged in the cylinder barrel; the first piston rod assembly comprises a first piston and a first piston rod connected to one end, close to the front cylinder cover, of the first piston, the first piston rod penetrates through the front cylinder cover and forms a back pressure oil cavity with the inner wall of the cylinder barrel, a back pressure oil port communicated with the back pressure oil cavity is formed in the outer wall, close to the front cylinder cover, of the cylinder barrel, and the back pressure oil port is used for inputting back pressure oil; the second piston rod assembly is positioned between the first piston rod assembly and the rear cylinder cover and comprises a second piston and a second piston rod connected to one end, close to the first piston, of the second piston, the second piston rod is in sealing fit with the inner wall of the cylinder barrel, a medium-pressure oil cavity is formed between the second piston rod and the first piston, a medium-pressure oil port communicated with the medium-pressure oil cavity is arranged on the outer wall of the cylinder barrel, close to the medium-pressure oil cavity, and the medium-pressure oil port is used for inputting medium-pressure oil; a high-pressure oil cavity is formed between the rear cylinder cover and the second piston, a high-pressure oil port communicated with the high-pressure oil cavity is formed in the rear cylinder cover, and the high-pressure oil port is used for inputting high-pressure oil; and medium pressure oil enters the medium pressure oil cavity through the medium pressure oil port to push the first piston so as to push the first piston rod to extend out of a first preset stroke, and then the high pressure oil is input into the high pressure oil cavity from the high pressure oil port to push the second piston rod, the medium pressure oil in the medium pressure oil cavity and the first piston rod assembly integrally advance, so that the first piston rod extends out of a second preset stroke again, and the back pressure oil enters the back pressure oil cavity through the back pressure oil port to realize the resetting of the first preset stroke and the second preset stroke.
Preferably, the diameter of the second piston is larger than the diameter of the first piston.
Preferably, a piston track groove matched with the diameter of the second piston is formed in the position, corresponding to the second piston rod, of the inner wall of the cylinder barrel, the piston track groove is formed in the advancing direction of the second piston, the length of the piston track groove is smaller than the length of the second piston after the second piston is connected with the second piston rod, and medium pressure oil is prevented from entering the piston track groove through the medium pressure oil cavity and interfering with the movement of the second piston rod assembly.
Preferably, the periphery of second piston is inlayed and is equipped with an anti-wear ring, anti-wear ring with piston track groove adaptation.
Preferably, the second piston is close to one side of back cylinder cap is a high-pressure oil cross-section, the high-pressure oil cross-section is sunken to have one to lead the oil groove to the direction of keeping away from this back cylinder cap, lead the design of oil groove be in order to prevent the second piston rod direct with the contact of high-pressure oil port forms seals, sunken lead the oil groove increase high-pressure oil get into when high-pressure oil chamber with the area of contact of second piston rod is convenient for promote the second piston is marchd, and then required energy when reducing high-pressure oil and getting into.
Preferably, the first piston comprises a back pressure oil section close to one side of the front cylinder cover and a medium pressure oil section close to one side of the medium pressure oil cavity, and the area ratio of the medium pressure oil section to the back pressure oil section is more than or equal to 1.3:1, so that the stability of the first piston rod assembly is improved.
Preferably, the middle-pressure oil section middle part of first piston is to keeping away from the direction arch of first piston has a buffering boss, the second piston rod is close to one side of first piston inwards sunken have with the buffering recess of buffering boss adaptation, the buffering boss with the cooperation of buffering recess is used for buffering the reseing of first piston avoids its direct and second piston rod collision, simultaneously the buffering boss with buffering recess cooperation back first piston with can reserve between the second piston rod and have certain clearance, this clearance is favorable to middling pressure oil to get into the promotion first piston with the separation of second piston rod.
Preferably, an O-shaped sealing ring, an OE-shaped sealing ring or a T-shaped sealing ring is arranged on the outer circumferential side wall of the first piston.
Preferably, the first piston rod and the first piston are of an integrated structure.
Preferably, the second piston rod and the second piston are of an integrated structure.
The utility model has the advantages that:
the utility model provides a pair of two step type pressure boost oil cylinder utilizes the incompressible characteristic of hydraulic oil, transmits the energy promptly the utility model discloses utilize the high-pressure oil to promote well pressure oil and the first piston assembly in second piston assembly, the well pressure oil pocket and advance in the lump to realize stretching out of first piston rod, get into the backpressure oil pocket by the backpressure oil at last and realize resetting, based on this, the utility model discloses compare with prior art and have following advantage:
(1) in structural design, the S medium pressure (area of a medium pressure section) design is smaller than that of a crude oil cylinder, so that the medium pressure oil inlet amount of the oil cylinder is reduced, and the energy consumption of the whole oil cylinder is further reduced.
(2) The area ratio between the S middle pressure (middle pressure cross section area) and the S back pressure (back pressure cross section area) is reduced, the pressure difference is reduced, and the integral stability of the oil cylinder is improved.
(3) The medium-pressure oil cavity and the high-pressure oil cavity are matched for driving, so that the high-pressure of the oil cylinder is lower than that of the original oil cylinder, and the overall energy consumption of the oil cylinder is effectively saved.
Drawings
Fig. 1 is a double-step type pressure-increasing oil cylinder provided by the embodiment of the invention;
fig. 2 is a schematic view of a partial structure of a dual-step type pressurized oil cylinder provided by an embodiment of the present invention.
In the figure: 1-a first piston rod, 2-a front cylinder cover, 3-a back pressure oil nozzle, 4-a back pressure oil cavity, 5-a middle pressure oil nozzle, 6-a second piston rod, 7-a rear cylinder cover, 8-a high pressure oil nozzle, 9-a second piston, 10-a middle pressure oil cavity, 11-a first piston, 12-a cylinder barrel, 13-a guide sleeve, 14-a first sealing element, 15-a second sealing element, 16-a screw, 17-a third sealing element, 18-an anti-wear ring, 30-a back pressure oil port, 50-a middle pressure oil port, 80-a high pressure oil port, 90-an oil guide groove, 100-a piston track groove, 111-a back pressure oil section, 112-a middle pressure oil section, 113-a buffer boss and 114-a buffer groove.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
Examples
Referring to fig. 1, the double-step type boost cylinder provided in this embodiment includes a cylinder 12, a front cylinder head 2 disposed at one end of the cylinder 12, a rear cylinder head 7 disposed at one end of the cylinder 12 far away from the front cylinder head 2, and a first piston rod assembly and a second piston rod assembly disposed in the cylinder 12.
Referring to fig. 2, the cylinder 12 includes an outer wall and an opposite inner wall, the front cylinder head 2 and the rear cylinder head 7 are mounted at two ends of the cylinder 12 through a predetermined number of screws 16, a guide sleeve 13 is further embedded between the front cylinder head 2 and the cylinder 12, the outer wall of the guide sleeve 13 is adapted to the inner wall of the cylinder 12, and a first sealing member 14 is provided.
First piston rod subassembly is including a first piston 11 and connect in this first piston 11 is close to a first piston rod 1 of this preceding cylinder cap 2's one end, first piston rod 1 passes through in proper order uide bushing 13 with preceding cylinder cap 2, uide bushing 13 with first piston rod 1 seals through predetermined quantity's second sealing member 15, preceding cylinder cap 2 through a third sealing member 17 with first piston rod 1 realizes sealed, third sealing member 17 is the felt in this embodiment, first piston rod 1 with first piston 11 with the inner wall of cylinder 12 is formed with a back pressure oil pocket 4, be provided with any one in O type sealing washer, OE type sealing washer or the T type sealing washer on the first piston 11 excircle lateral wall. The cylinder barrel 12 is close to the front cylinder cover 2, a back pressure oil port 30 communicated with the back pressure oil cavity 4 is formed in the outer wall of the front cylinder cover, and a back pressure oil nozzle 3 is further arranged on the back pressure oil port 30 in the embodiment and used for inputting back pressure oil into the back pressure oil cavity 4.
The second piston rod assembly is located between the first piston rod assembly and the rear cylinder cover 7, and it is close to a second piston rod 6 of first piston 11 one end including a second piston 9 and connecting in this second piston 9, second piston rod 6 with the sealed cooperation of the inner wall of cylinder 12, this second piston rod 6 with be formed with a middling pressure oil pocket 10 between the first piston 11, be close to on the outer wall of cylinder 12 the position department of middling pressure oil pocket 10 be equipped with a middling pressure hydraulic fluid port 50 that the middling pressure oil pocket 10 is linked together, in this embodiment be equipped with a middling pressure glib talker 5 on the middling pressure hydraulic fluid port 50, be used for to input middling pressure oil in the middling pressure oil pocket 10. A high-pressure oil cavity is formed between the rear cylinder cover 7 and the second piston 9, a high-pressure oil port 80 communicated with the high-pressure oil cavity is arranged on the rear cylinder cover 7, and a high-pressure oil nozzle 8 is arranged on the high-pressure oil port 80 in the embodiment and used for inputting high-pressure oil into the high-pressure oil cavity.
Further, the diameter of the second piston 9 is greater than that of the first piston 11, a piston track groove 100 adapted to the diameter of the second piston 9 is formed in a position, corresponding to the second piston rod 6, on the inner wall of the cylinder 12, the piston track groove 100 is arranged along the advancing direction of the second piston 9, the length of the piston track groove 100 is less than the length of the second piston 9 after the second piston 9 is connected with the second piston rod 6, and medium pressure oil is prevented from entering the piston track groove 100 through the medium pressure oil chamber 10 and interfering with the movement of the second piston rod assembly; an anti-wear ring 18 is embedded in the periphery of the second piston 9, and the anti-wear ring 18 is matched with the piston track groove 100.
Further, second piston 9 is close to one side of back cylinder cap 7 is a high-pressure oil cross-section, the high-pressure oil cross-section is sunken to have one to lead oil groove 90 towards the direction of keeping away from this back cylinder cap 7, lead oil groove 90's design be in order to prevent second piston rod 6 direct with high-pressure hydraulic fluid port 80 contact formation is sealed, sunken lead oil groove 90 increase high-pressure oil when getting into the high-pressure oil pocket with the area of contact of second piston rod 6 is convenient for promote second piston 9 advances, and then required energy when reducing high-pressure oil and getting into.
Further, the first piston 11 includes a back pressure oil section 111 near one side of the front cylinder head 2 and a middle pressure oil section 112 near one side of the middle pressure oil chamber 10, and an area ratio of the middle pressure oil section 112 to the back pressure oil section 111 is greater than or equal to 1.3:1, so as to improve the stability of the first piston rod assembly in extension and retraction. First piston 11 the middle part of medium pressure oil cross-section 112 is to keeping away from first piston 11's direction arch has a buffering boss 113, second piston rod 6 is close to one side of first piston 11 inwards sunken have with a buffering recess 114 of buffering boss 113 adaptation, buffering boss 113 with buffering recess 114 cooperation is used for buffering first piston 11's restoration avoids its direct and second piston rod 6 collision, simultaneously buffering boss 113's protruding height is greater than buffering recess 114's depth of depression, arrives promptly buffering boss 113 with buffering recess 114 cooperation back first piston 11 with can reserve between the second piston rod 6 certain clearance, this clearance is favorable to the medium pressure oil to get into the promotion first piston 11 with the separation of second piston rod 6.
In the present embodiment, the first piston rod 1 and the first piston 11 are designed as an integral structure; the second piston rod 6 and the second piston 9 are designed into an integral structure.
Specifically, with reference to the attached drawings, in this embodiment, after the medium-pressure oil enters the medium-pressure oil chamber 10 through the medium-pressure oil nozzle 5 on the medium-pressure oil port 50 to push the first piston 11 to push the first piston rod 1 to extend out by a first predetermined stroke, the high-pressure oil is input into the high-pressure oil chamber from the high-pressure oil nozzle 8 on the high-pressure oil port 80 to push the second piston 9 to move, so as to push the second piston rod 6, the medium-pressure oil in the medium-pressure oil chamber 10 and the first piston rod assembly to integrally advance, and further, the first piston rod 1 extends out by a second predetermined stroke again; and the back pressure oil enters the back pressure oil cavity 4 through the back pressure oil nozzle 3 on the back pressure oil port 30 to realize the resetting of the first preset stroke and the second preset stroke.
The double-step type pressurized oil cylinder provided by the embodiment transfers energy by utilizing the incompressible property of hydraulic oil, that is, the embodiment utilizes high-pressure oil to push the second piston assembly, the medium-pressure oil in the medium-pressure oil chamber 10 and the first piston assembly to travel together, so as to realize the extension of the first piston rod 1, and finally, the back-pressure oil enters the back-pressure oil chamber 4 to realize the reset, on the basis, the embodiment has the following advantages compared with the prior art:
(1) in structural design, the S middle pressure (the area of the middle pressure oil section 112) is designed to be smaller than that of a crude oil cylinder, so that the middle pressure oil inlet amount of the oil cylinder is reduced, and the energy consumption of the whole oil cylinder is further reduced.
(2) The area ratio between the S middle pressure (the area of the middle pressure oil section 112) and the S back pressure (the area of the back pressure oil section 111) is reduced, the pressure difference is reduced, and the integral stability of the oil cylinder is improved.
(3) The medium-pressure oil cavity 10 and the high-pressure oil cavity are matched for driving, so that the high-pressure of the oil cylinder is lower than that of the original oil cylinder, and the overall energy consumption of the oil cylinder is effectively saved.
The above description is only for the specific embodiments of the present invention, but it should be understood by those skilled in the art that the present invention is only by way of example, and the scope of the present invention is defined by the appended claims. Therefore, the equivalent changes made in the claims of the present invention still belong to the scope covered by the present invention.
Claims (10)
1. A kind of double-step type pressurized oil cylinder, including a cylinder, a front cylinder cover set up in one end of the said cylinder and setting up in the said cylinder and keeping away from one end of the said front cylinder cover after cylinder, characterized by that, the said double-step pressurized oil cylinder also includes a first piston rod assembly and a second piston rod assembly set up in the said cylinder;
the first piston rod assembly comprises a first piston and a first piston rod connected to one end, close to the front cylinder cover, of the first piston, the first piston rod penetrates through the front cylinder cover and forms a back pressure oil cavity with the inner wall of the cylinder barrel, a back pressure oil port communicated with the back pressure oil cavity is formed in the outer wall, close to the front cylinder cover, of the cylinder barrel, and the back pressure oil port is used for inputting back pressure oil;
the second piston rod assembly is positioned between the first piston rod assembly and the rear cylinder cover and comprises a second piston and a second piston rod connected to one end, close to the first piston, of the second piston, the second piston rod is in sealing fit with the inner wall of the cylinder barrel, a medium-pressure oil cavity is formed between the second piston rod and the first piston, a medium-pressure oil port communicated with the medium-pressure oil cavity is arranged on the outer wall of the cylinder barrel, close to the medium-pressure oil cavity, and the medium-pressure oil port is used for inputting medium-pressure oil; a high-pressure oil cavity is formed between the rear cylinder cover and the second piston, a high-pressure oil port communicated with the high-pressure oil cavity is formed in the rear cylinder cover, and the high-pressure oil port is used for inputting high-pressure oil; and medium pressure oil enters the medium pressure oil cavity through the medium pressure oil port to push the first piston so as to push the first piston rod to extend out of a first preset stroke, and then the high pressure oil is input into the high pressure oil cavity from the high pressure oil port to push the second piston rod, the medium pressure oil in the medium pressure oil cavity and the first piston rod assembly integrally advance, so that the first piston rod extends out of a second preset stroke again, and the back pressure oil enters the back pressure oil cavity through the back pressure oil port to realize the resetting of the first preset stroke and the second preset stroke.
2. The dual step pressurized oil cylinder of claim 1 wherein said second piston has a diameter greater than a diameter of said first piston.
3. The two-step type pressure increasing oil cylinder according to claim 2, wherein a piston track groove adapted to the diameter of the second piston is formed in the inner wall of the cylinder barrel at a position corresponding to the second piston rod, the piston track groove is formed along the traveling direction of the second piston, and the length of the piston track groove is less than the length of the second piston after the second piston is connected with the second piston rod.
4. The two-step pressure increasing oil cylinder as claimed in claim 3, wherein an antiwear ring is embedded in the periphery of the second piston, and the antiwear ring is adapted to the piston track groove.
5. The dual step pressurized oil cylinder according to claim 3, wherein said second piston has a high pressure oil section on a side thereof adjacent to said rear cylinder head, said high pressure oil section being recessed with an oil guide groove in a direction away from said rear cylinder head.
6. The two-step pressurized oil cylinder as recited in claim 1, wherein said first piston includes a back pressure oil section adjacent to one side of said front cylinder head and a medium pressure oil section adjacent to one side of said medium pressure oil chamber, and an area ratio of said medium pressure oil section to said back pressure oil section is greater than or equal to 1.3: 1.
7. The dual-step pressure-increasing oil cylinder as claimed in claim 6, wherein a buffering boss protrudes from the middle of the medium pressure oil section of the first piston in a direction away from the first piston, and a buffering groove matched with the buffering boss is recessed inward from one side of the second piston rod close to the first piston.
8. The dual-step pressurized oil cylinder as claimed in claim 1, wherein an O-ring, an OE-ring or a T-ring is disposed on the outer circumferential sidewall of the first piston.
9. The two-step pressurized oil cylinder according to any one of claims 1 to 8, characterized in that said first piston rod is of one-piece construction with said first piston.
10. The two-step pressurized oil cylinder according to any one of claims 1 to 8, characterized in that said second piston rod is of one-piece construction with said second piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921258092.8U CN211174832U (en) | 2019-08-05 | 2019-08-05 | Two-step type pressure boosting oil cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921258092.8U CN211174832U (en) | 2019-08-05 | 2019-08-05 | Two-step type pressure boosting oil cylinder |
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| Publication Number | Publication Date |
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| CN211174832U true CN211174832U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921258092.8U Active CN211174832U (en) | 2019-08-05 | 2019-08-05 | Two-step type pressure boosting oil cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324724A (en) * | 2019-08-05 | 2021-02-05 | 广州晶品智能压塑科技股份有限公司 | Two-step type pressure boosting oil cylinder |
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2019
- 2019-08-05 CN CN201921258092.8U patent/CN211174832U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324724A (en) * | 2019-08-05 | 2021-02-05 | 广州晶品智能压塑科技股份有限公司 | Two-step type pressure boosting oil cylinder |
| CN112324724B (en) * | 2019-08-05 | 2024-06-14 | 广州晶品智能压塑科技股份有限公司 | Double-step type booster cylinder |
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