CN220320012U - Quick oil cylinder - Google Patents
Quick oil cylinder Download PDFInfo
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- CN220320012U CN220320012U CN202321615073.2U CN202321615073U CN220320012U CN 220320012 U CN220320012 U CN 220320012U CN 202321615073 U CN202321615073 U CN 202321615073U CN 220320012 U CN220320012 U CN 220320012U
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- 239000003921 oil Substances 0.000 description 203
- 239000010720 hydraulic oil Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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Abstract
The utility model relates to a quick oil cylinder, which comprises a large oil cylinder and a small oil cylinder; the large oil cylinder is provided with a large oil cylinder body, a main piston rod and a main piston; a cavity is formed in the main piston of the large oil cylinder and the main piston rod; a small oil cylinder is fixed on the rear cover of the large oil cylinder body and is positioned in the cavity area; the small oil cylinder is provided with a small oil cylinder body, a quick pushing piston rod and a small piston; a main oil pushing cavity is formed between the main piston and the rear end of the large oil cylinder body, and a main oil pushing port is arranged; a main oil return cavity is formed between the main piston and the front end of the large oil cylinder body, and a main oil return port is arranged; a quick-pushing oil cavity is formed between the small piston and the rear end of the small oil cylinder body, and a quick-pushing oil port is formed; an auxiliary oil cavity is formed between the small piston and the front end of the small oil cylinder body, and the auxiliary oil cavity is communicated with the cavity; the cavity is communicated with the main pushing oil cavity. The utility model adopts the structure that the small oil cylinder is embedded in the large oil cylinder, the exposed volume is not obviously changed, and the structure is more reasonable; and the requirements of realizing large-stroke quick pushing in the front section and large-pressure slow pushing in the rear section can be met.
Description
Technical Field
The utility model relates to a hydraulic cylinder, in particular to a cylinder with a lost motion rapid propulsion function, and belongs to the technical field of hydraulic pressure.
Background
The hydraulic cylinder is a common hydraulic driving element, can stably output linear thrust and is widely applied to mechanical equipment. However, the hydraulic cylinder currently sold in the market has a simple internal structure, and only can realize single output speed and thrust, so that the hydraulic cylinder needs a large amount of hydraulic oil to drive in a working state with a long partial idle stroke, and can only be propped against a working position for a long time, and then large-pressure output operation is performed.
Therefore, the applicant designs and discloses an energy-saving synergistic linear driving cylinder with the Chinese patent number of CN115681258A and a use method thereof, and the sectional area of a rear cavity is reduced by utilizing a double-piston design, so that the forward pushing speed of a main piston rod is accelerated.
However, the rear end of the oil cylinder is protruded due to the existence of the auxiliary piston rod, so that the exposed size of the oil cylinder is increased.
Therefore, to meet the above needs, it is necessary to further improve the structure of the hydraulic cylinder, so as to achieve the large stroke and the high pressure and the slow pushing at the rear section, and properly reduce the volume.
Disclosure of Invention
The utility model aims to provide a quick oil cylinder which can realize large-stroke quick pushing at the front section and large-pressure slow pushing at the rear section and properly reduce the volume of the oil cylinder.
In order to achieve the aim of the utility model, the utility model provides a quick oil cylinder, which comprises a large oil cylinder and a small oil cylinder;
the large oil cylinder is provided with a large oil cylinder body, a main piston rod and a main piston; the main piston is arranged in the large oil cylinder body, the front end of the main piston is provided with a main piston rod, the main piston rod penetrates through the front cover of the large oil cylinder body, and the end part of the main piston rod is a working part;
a cavity is formed in the main piston of the large oil cylinder and the main piston rod; a small oil cylinder is fixed on the rear cover of the large oil cylinder body and is positioned in the cavity area;
the small oil cylinder is provided with a small oil cylinder body, a quick pushing piston rod and a small piston; the small piston is arranged in the small oil cylinder body, and the front end of the small piston is provided with a quick-push piston rod which penetrates through the front end of the small oil cylinder body;
a main oil pushing cavity is formed between the main piston and the rear end of the large oil cylinder body, the small oil cylinder body is positioned in the main oil pushing cavity, and the main oil pushing cavity is provided with a main oil pushing port;
a main oil return cavity is formed between the main piston and the front end of the large oil cylinder body, the main piston rod is positioned in the main oil return cavity, and the main oil return cavity is provided with a main oil return port;
a quick-pushing oil cavity is formed between the small piston and the rear end of the small oil cylinder body, and a quick-pushing oil port is formed;
an auxiliary oil cavity is formed between the small piston and the front end of the small oil cylinder body, the quick pushing piston rod is positioned in the auxiliary oil cavity, and the auxiliary oil cavity is communicated with the cavity;
the cavity is communicated with the main pushing oil cavity.
As a further improvement of the utility model, the diameter of the outer wall of the small oil cylinder body is smaller than the inner diameter of the cavity, and the outer wall of the small oil cylinder body is not contacted with the inner wall of the cavity.
As a further improvement of the utility model, the outer wall of the small oil cylinder body is in sliding fit with the cavity, an oil passing channel is arranged between the cavity and the main oil pushing cavity, and the cavity is connected with the main oil pushing cavity.
As a further improvement of the utility model, the front end of the small oil cylinder body is not provided with a front cover, or a gap exists between a middle hole of the front cover and the quick-push piston rod, so that the auxiliary oil cavity is communicated with the cavity.
As a further improvement of the utility model, the front end of the small oil cylinder body is provided with a front cover, and the quick push piston rod passes through the front cover;
the front cover is provided with an oil passing hole through which the auxiliary oil cavity is communicated with the cavity.
As a further improvement of the utility model, the end part of the quick-push piston rod of the small oil cylinder is not fixedly connected with the main piston rod in the cavity of the large oil cylinder.
As a further improvement of the utility model, the end part of the quick-push piston rod of the small oil cylinder is fixedly connected with the main piston rod in the cavity of the large oil cylinder.
Further, the quick pushing piston rod is fixedly connected with the main piston rod through a connecting body;
the cross-sectional area of the connecting body is smaller than that of the quick push piston rod.
When the quick oil cylinder is used as a propulsion oil cylinder, a small-pressure quick pushing mode can be adopted for output, at the moment, a quick pushing oil port is connected with a hydraulic pump, a main pushing oil port is connected with a liquid filling valve, and a main oil return port is connected with an oil return pipeline; starting a hydraulic pump, and injecting high-pressure hydraulic oil into the quick-push oil cavity, wherein the effective area of a small piston in the quick-push oil cavity is smaller than the cross section area of a large oil cylinder body, so that when the output of the hydraulic pump is directly injected into the quick-push oil cavity, the small piston is driven to move forwards quickly, and the quick-push piston rod is driven to extend out quickly; at the moment, the quick pushing piston rod is propped against the main piston rod in the cavity, so that the main piston rod and the main piston are driven to move together quickly and forwards, and the working part of the main piston rod can be quickly extended; in the working process, the volume of the auxiliary oil cavity is gradually reduced, hydraulic oil in the auxiliary oil cavity enters the cavity through the oil hole, the volumes of the cavity and the main pushing oil cavity are gradually increased, and the increase is far greater than the reduction of the volume of the auxiliary oil cavity, so that the main pushing oil port actively supplements oil from the oil tank through the filling valve.
When the small piston runs to the front end of the small oil cylinder body or the main piston rod runs to a designated position rapidly, the quick oil cylinder is switched to a high-pressure slow-pushing mode for outputting, the quick oil pushing port is disconnected with the hydraulic pump, the output of the hydraulic pump is connected to the main oil pushing port, and the main oil return port is still connected with the oil return pipeline; at the moment, high-pressure hydraulic oil is injected into the main pushing oil cavity and then into the cavity, the high-pressure hydraulic oil in the main pushing oil cavity pushes the main piston to move forwards, and the high-pressure hydraulic oil in the cavity directly pushes the main piston rod to move forwards; the cavity is communicated with the main oil pushing cavity, and the main piston rod is connected with the main piston, so that the high-pressure hydraulic oil entering from the main oil pushing port finally pushes the main piston rod to move forwards; in the process, the effective pushing area of the high-pressure hydraulic oil of the main piston rod is the area of the main piston plus the area of the cavity, namely the cross section area equivalent to the large oil cylinder body, even if the working part of the main piston rod can extend out with larger pressure, the large-pressure work is realized.
When the quick oil cylinder needs to be reset, the quick oil pushing port and the main oil pushing port are connected with an oil return pipeline, and the main oil return port is connected with a hydraulic pump; at the moment, high-pressure hydraulic oil is injected into the main oil return cavity, and the high-pressure hydraulic oil pushes the main piston to move backwards for resetting; at this time, the hydraulic oil in the cavity and the main oil pushing cavity is discharged outwards through the main oil pushing port. In the process, hydraulic oil pushes the small piston to move backwards to reset, or the main piston rod is retracted to drive the quick-push piston rod to move backwards to reset. Finally, the resetting of the large oil cylinder and the small oil cylinder is realized.
According to the quick oil cylinder, the small oil cylinder is embedded in the large oil cylinder, so that the main piston rod can be driven to extend quickly through the work of the small oil cylinder, and the main piston rod can be driven to extend under high pressure through the oil injection of the main oil pushing cavity, the working efficiency of the oil cylinder can be obviously improved, and the output flow requirement of the hydraulic pump is reduced.
The small oil cylinder is embedded in the large oil cylinder, so that the exposure volume of the whole quick oil cylinder is not obviously changed, and the structure is more reasonable; in the process, the front and rear stress areas of the quick pushing piston rod of the small oil cylinder are consistent, so that pressure balance is realized, and the problem of pressure holding does not exist.
Drawings
FIG. 1 is a front view of the overall structure of a quick cylinder of the present utility model;
FIG. 2 is a schematic diagram of a quick cylinder according to the present utility model in a ready state;
FIG. 3 is a schematic diagram of a small pressure quick push state of a quick cylinder according to the present utility model;
FIG. 4 is a schematic diagram of a high pressure slow push state of a fast cylinder according to the present utility model;
FIG. 5 is a schematic diagram showing a reset state of a quick cylinder according to the present utility model;
FIG. 6 is a schematic diagram of a quick cylinder according to an embodiment of the present utility model;
reference numerals: the large oil cylinder 1, the large oil cylinder body 11, the main piston rod 12, the main piston 13, the cavity 14, the main oil pushing cavity 15, the main oil pushing port 151, the main oil return cavity 16 and the main oil return port 161; a connecting body 18;
the hydraulic cylinder comprises a small oil cylinder 2, a small oil cylinder body 21, a quick-push piston rod 22, a small piston 23, an oil passing hole 24, a quick-push oil cavity 25, a quick-push oil port 251 and an auxiliary oil cavity 26.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
Fig. 1 shows a schematic diagram of the whole structure of a quick oil cylinder of the present utility model, including a large oil cylinder 1 and a small oil cylinder 2.
The large oil cylinder 1 is provided with a large oil cylinder body 11, a main piston rod 12 and a main piston 13; the main piston 13 is installed in the large oil cylinder body 11, the front end of the main piston 13 is provided with a main piston rod 12, the main piston rod 12 penetrates through the front cover of the large oil cylinder body 11, and the end part of the main piston rod 12 is the working part of the whole quick oil cylinder disclosed by the utility model and outputs thrust outwards.
The utility model is improved in that a cavity 14 is arranged in the main piston 13 and the main piston rod 12; a small oil cylinder 2 is fixed on the rear cover of the large oil cylinder body 11, and the small oil cylinder 2 is positioned in the cavity 14 and the main oil pushing cavity 15; the small oil cylinder 2 is provided with a small oil cylinder body 21, a quick push piston rod 22 and a small piston 23; the small piston 23 is installed in the small oil cylinder 21, and the front end of the small piston 23 is provided with a quick-push piston rod 22, and the quick-push piston rod 22 passes through the front end of the small oil cylinder 21. The diameter of the outer wall of the small oil cylinder 21 is preferably smaller than the inner diameter of the cavity 14, i.e. the outer wall of the small oil cylinder 21 is not in contact with the cavity 14.
Further, a main oil pushing cavity 15 is formed between the main piston 13 and the rear end of the large oil cylinder 11, and a main oil pushing port 151 is provided; a main oil return cavity 16 is formed between the main piston 13 and the front end of the large oil cylinder body 11, and a main oil return port 161 is arranged; a quick-pushing oil cavity 25 is formed between the small piston 23 and the rear end of the small oil cylinder body 21, and a quick-pushing oil port 251 is arranged; an auxiliary oil chamber 26 is formed between the small piston 23 and the front end of the small oil cylinder 21, and the auxiliary oil chamber 26 is communicated with the main piston 13 and the cavity 14 in the main piston rod 12.
In order to realize that the auxiliary oil chamber 26 is communicated with the main piston 13 and the cavity 14 in the main piston rod 12, the small oil cylinder body 21 may not be provided with a front cover, or the front cover is provided with an oil passing hole 24.
Before use, hydraulic oil is filled in each cavity of the large oil cylinder 1 and the small oil cylinder 2.
As shown in fig. 2, a quick cylinder of the present utility model is in a ready-to-use state, in which, in order to achieve quick extension of the main piston rod 12, the quick oil push port 251 is connected to a hydraulic pump, the main oil push port 151 is connected to a charge valve, and the main oil return port 161 is connected to an oil return line. Starting a hydraulic pump, and injecting high-pressure hydraulic oil into the quick-push oil cavity 25, wherein the effective area of the small piston 23 in the quick-push oil cavity 25 is smaller than the cross section area of the large oil cylinder body 11 (namely the piston area of the original large oil cylinder), so that when the output of the hydraulic pump is directly injected into the quick-push oil cavity 25, the small piston 23 is driven to move forwards quickly, and the quick-push piston rod 22 is driven to extend out quickly; at this time, the fast pushing piston rod 22 abuts against the main piston rod 12 in the cavity 14, so that the main piston rod 12 and the main piston 13 are driven to move together fast forward, so that the working portion of the main piston rod 12 can be extended fast, as shown in fig. 3, at this time, the volume of the auxiliary oil chamber 26 is reduced, hydraulic oil in the auxiliary oil chamber 26 enters the cavity 14 through the oil hole 24, the volumes of the cavity 14 and the main pushing oil chamber 15 are increased, and the increase is far greater than the reduction of the volume of the auxiliary oil chamber 26, so that the main pushing oil port 151 is actively replenished with oil from the oil tank through the filling valve.
As shown in fig. 4, when the small piston 23 is moved to the front end of the small cylinder 21 or the main piston rod 12 has been moved to a designated position rapidly, the quick oil push port 251 is disconnected from the hydraulic pump, and the output of the hydraulic pump is connected to the main oil push port 151, and the main oil return port 161 remains connected to the oil return line; at this time, high-pressure hydraulic oil is injected into the main pushing oil cavity 15 and then into the cavity 14, the high-pressure hydraulic oil in the main pushing oil cavity 15 pushes the main piston 13 to move forward, and the high-pressure hydraulic oil in the cavity 14 directly pushes the main piston rod 12 to move forward; the cavity 14 is communicated with the main oil pushing cavity 15, and the main piston rod 12 is connected with the main piston 13, so that the high-pressure hydraulic oil entering from the main oil pushing port 151 finally pushes the main piston rod 12 to move forwards; at this time, the fast-pushing oil port 251 is preferably in a closed state, the fast-pushing oil cavity 25 is in a pressure maintaining state, the fast-pushing piston rod 22 does not move (the front end surface of the fast-pushing piston rod 22 is also subjected to high-pressure hydraulic oil, but the position of the fast-pushing piston rod 22 cannot be changed because the fast-pushing oil cavity 25 maintains the pressure), but if the fast-pushing oil port 251 is connected with an oil return pipeline, the fast-pushing piston rod 22 drives the small piston 23 to reset under the pushing of the high-pressure hydraulic oil until the small piston 23 is propped against the rear end of the small oil cylinder 21); at this time, the effective pushing area of the high-pressure hydraulic oil of the main piston rod 12 is the area of the main piston 13 plus the area of the cavity 14, which is equivalent to the cross-sectional area of the large oil cylinder 11, even if the working part of the main piston rod 12 can be extended with larger pressure, so as to realize large-pressure working.
According to the quick oil cylinder disclosed by the utility model, the small oil cylinder 2 is embedded in the large oil cylinder 1, so that the main piston rod 12 can be driven to extend quickly through the work of the small oil cylinder, and the main piston rod 12 can be driven to extend under high pressure through the oil injection of the main oil pushing cavity 15, thereby obviously improving the working efficiency of the oil cylinder and reducing the output flow requirement of the hydraulic pump.
In the quick oil cylinder of the utility model, when the quick oil cylinder is reset, as shown in fig. 5, a quick oil pushing port 251 and a main oil pushing port 151 are connected with an oil return pipeline, and a main oil return port 161 is connected with a hydraulic pump; at this time, high-pressure hydraulic oil is injected into the main oil return cavity 16, and the high-pressure hydraulic oil pushes the main piston 13 to move backwards for resetting; at this time, the hydraulic oil in the cavity 14 and the main oil pushing cavity 15 is discharged outward through the main oil pushing port 151. Part of the hydraulic oil also enters the auxiliary oil chamber 26 to push the small piston 23 to move backwards for resetting, the volume of the auxiliary oil chamber 26 is increased, and the volume of the quick pushing oil chamber 25 is reduced. Alternatively, when the main piston rod 12 is retracted to the position shown in fig. 3, the solid portion of the main piston rod 12 at the end of the cavity 14 is again in contact with the quick piston rod 22, so as to drive the quick piston rod 22 and the small piston 23 to move backward for resetting.
The design is aimed at the working state that the distance between the small-pressure quick pushing working section and the large-pressure slow pushing working section is similar, and the main piston rod 12 is separated from the quick pushing piston rod 22; when the distance between the small-pressure quick pushing working section and the large-pressure slow pushing working section is far greater than that between the small-pressure quick pushing working section and the large-pressure slow pushing working section, the quick oil cylinder can be changed into a structure shown in fig. 6, namely, the length of the small oil cylinder 2 is prolonged, meanwhile, the quick pushing piston rod 22 and the main piston rod 12 at the end part of the cavity 14 can be connected together, but in order to reduce the influence of the area of a connecting body on the effective area during the large-pressure main pushing operation after the quick pushing working section and the connecting body are connected together, the area of the quick pushing piston rod 22 can be reduced, or the main piston rod 12 and the quick pushing piston rod 22 are connected through a plurality of connecting bodies 18 with small cross-section areas, so that the main piston rod 12 and the quick pushing piston rod 22 synchronously stretch, the damage of parts caused by contact and collision between the main piston rod and the quick pushing working section can be effectively avoided, or metal chips drop, and the safety of a hydraulic oil way is influenced.
While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (8)
1. The quick oil cylinder is characterized by comprising a large oil cylinder and a small oil cylinder;
the large oil cylinder is provided with a large oil cylinder body, a main piston rod and a main piston; the main piston is arranged in the large oil cylinder body, the front end of the main piston is provided with a main piston rod, the main piston rod penetrates through the front cover of the large oil cylinder body, and the end part of the main piston rod is a working part;
a cavity is formed in the main piston of the large oil cylinder and the main piston rod; a small oil cylinder is fixed on the rear cover of the large oil cylinder body and is positioned in the cavity area;
the small oil cylinder is provided with a small oil cylinder body, a quick pushing piston rod and a small piston; the small piston is arranged in the small oil cylinder body, and the front end of the small piston is provided with a quick-push piston rod which penetrates through the front end of the small oil cylinder body;
a main oil pushing cavity is formed between the main piston and the rear end of the large oil cylinder body, the small oil cylinder body is positioned in the main oil pushing cavity, and the main oil pushing cavity is provided with a main oil pushing port;
a main oil return cavity is formed between the main piston and the front end of the large oil cylinder body, the main piston rod is positioned in the main oil return cavity, and the main oil return cavity is provided with a main oil return port;
a quick-pushing oil cavity is formed between the small piston and the rear end of the small oil cylinder body, and a quick-pushing oil port is formed;
an auxiliary oil cavity is formed between the small piston and the front end of the small oil cylinder body, the quick pushing piston rod is positioned in the auxiliary oil cavity, and the auxiliary oil cavity is communicated with the cavity;
the cavity is communicated with the main pushing oil cavity.
2. A quick cylinder as claimed in claim 1, wherein the diameter of the outer wall of the small cylinder is smaller than the inner diameter of the cavity, and the outer wall of the small cylinder is not in contact with the inner wall of the cavity.
3. The quick cylinder as claimed in claim 1, wherein the outer wall of the small cylinder body is slidably fitted with the cavity, and an oil passage is provided between the cavity and the main oil pushing chamber to connect the cavity and the main oil pushing chamber.
4. The quick cylinder as claimed in claim 1, wherein the front end of the small cylinder body has no front cover, or a gap exists between the middle hole of the front cover and the quick piston rod, so that the auxiliary oil chamber is communicated with the cavity.
5. The quick cylinder as claimed in claim 1, wherein a front cover is provided at a front end of the small cylinder body, and the quick push piston rod passes through the front cover;
the front cover is provided with an oil passing hole through which the auxiliary oil cavity is communicated with the cavity.
6. A quick cylinder as claimed in claim 1, wherein the end of the quick piston rod of the small cylinder is not fixedly connected to the main piston rod in the cavity of the large cylinder.
7. A quick cylinder as claimed in claim 1, wherein the end of the quick piston rod of the small cylinder is fixedly connected to the main piston rod in the cavity of the large cylinder.
8. The quick cylinder as claimed in claim 7, wherein the quick piston rod is fixedly connected with the main piston rod through a connecting body;
the cross-sectional area of the connecting body is smaller than that of the quick push piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615073.2U CN220320012U (en) | 2023-06-21 | 2023-06-21 | Quick oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615073.2U CN220320012U (en) | 2023-06-21 | 2023-06-21 | Quick oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220320012U true CN220320012U (en) | 2024-01-09 |
Family
ID=89420032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321615073.2U Active CN220320012U (en) | 2023-06-21 | 2023-06-21 | Quick oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220320012U (en) |
-
2023
- 2023-06-21 CN CN202321615073.2U patent/CN220320012U/en active Active
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