CN221074827U - Plunger cylinder capable of controlling extension and contraction - Google Patents
Plunger cylinder capable of controlling extension and contraction Download PDFInfo
- Publication number
- CN221074827U CN221074827U CN202322759523.1U CN202322759523U CN221074827U CN 221074827 U CN221074827 U CN 221074827U CN 202322759523 U CN202322759523 U CN 202322759523U CN 221074827 U CN221074827 U CN 221074827U
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- plunger
- cylinder
- cylinder body
- piston rod
- oil
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- 230000008602 contraction Effects 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 5
- 230000000670 limiting effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model discloses a plunger cylinder capable of controlling expansion and contraction, which comprises a cylinder body, wherein one end of the cylinder body is closed, and the other end of the cylinder body is provided with an opening; the plunger is arranged in the cylinder body, and one end of the plunger extends out of the opening of the cylinder body; the plunger is kept away from cylinder body open-ended terminal surface and has been seted up cylindrical hole, installs the hydro-cylinder in the hole, the hydro-cylinder includes: the piston rod comprises a rod body and a piston arranged at the end part of the rod body, one end of the piston rod is positioned in the inner hole, and the other end of the piston rod extends out of the inner hole and is fixedly connected with the cylinder body; the guide sleeve is positioned at the lower end of the inner hole and is in sliding connection with the rod body. According to the utility model, the oil cylinder is arranged in the plunger, the piston rod is limited in the inner hole of the plunger by the guide sleeve, and the piston rod is fixedly connected to the cylinder body by the screw, so that the plunger is prevented from being separated from the cylinder body in the process of installation and transportation or in the process of telescopic movement of the plunger cylinder.
Description
Technical Field
The utility model relates to the technical field of hydraulic pressure, in particular to a plunger cylinder capable of controlling expansion and contraction.
Background
The conventional plunger cylinder generally comprises a plunger, a cylinder body, a guide sleeve, a sealing ring and other parts, wherein the plunger is directly arranged in an inner hole of the cylinder body, the plunger cylinder can only realize movement in one direction, and the return stroke is pushed by gravity, spring force or other external force. The conventional plunger cylinder has some use limitations when in actual use, for example, the upper end of the plunger is not limited, and the plunger is in risk of falling out of the cylinder body in the process of installation and transportation of the oil cylinder; secondly, in the use of the oil cylinder, the external load must have a limiting structure, otherwise, under the condition that the oil port continuously supplies oil and pressurizes, the plunger can deviate from the cylinder body to fail, and the plunger cylinder only has one oil port, and the plunger can only depend on oil supply to extend, and the plunger is required to be retracted by external load.
Disclosure of utility model
In order to solve the technical problem that a plunger in the prior art is easy to separate from a cylinder body, the utility model provides a plunger cylinder capable of controlling expansion and contraction, and solves the technical problem. The technical scheme of the utility model is as follows:
The plunger cylinder capable of controlling the extension comprises a cylinder body, wherein one end of the cylinder body is closed, and the other end of the cylinder body is provided with an opening; the plunger is arranged in the cylinder body, and one end of the plunger extends out of the opening of the cylinder body; the plunger is kept away from cylinder body open-ended terminal surface and has been seted up cylindrical hole, installs the hydro-cylinder in the hole, the hydro-cylinder includes:
The piston rod comprises a rod body and a piston arranged at the end part of the rod body, one end of the piston rod is positioned in the inner hole, and the other end of the piston rod extends out of the inner hole and is fixedly connected with the cylinder body;
The guide sleeve is positioned at the lower end of the inner hole and is in sliding connection with the rod body.
According to the plunger cylinder capable of controlling the extension and retraction, the oil cylinder is arranged in the plunger, so that the plunger can be prevented from being separated from the cylinder body in the process of installation and transportation or during the extension and retraction movement of the plunger cylinder; on the other hand, the quick extension and the stable retraction of the plunger can be realized by utilizing the extension and the retraction of the oil cylinder.
Further, the piston rod divides the inner hole into a first chamber and a second chamber, a first oil way communicated with the first chamber is arranged on the piston rod, and a second oil way communicated with the second chamber is also arranged on the piston rod.
Further, a first oil port and a second oil port are formed in the cylinder body, the first oil port is communicated with the first oil way, and the second oil port is communicated with the second oil way.
Further, a third oil port is further formed in the cylinder body.
Further, the rod body and the piston are of an integrated structure.
Furthermore, the piston rod is embedded into the cylinder body, and the piston rod is fixedly connected with the cylinder body by using a screw.
Further, sealing elements are arranged between the outer circumferential surface of the plunger and the inner wall of the cylinder, between the outer circumferential surface of the piston and the inner wall surface of the plunger, between the inner wall of the guide sleeve and the rod body, between the outer circumferential surface of the guide sleeve and the inner wall of the plunger inner hole and at the joint of the piston rod and the cylinder.
Further, the plunger cylinder further comprises a rod head, and the rod head is connected to the plunger through a rod head screw.
Based on the technical scheme, the utility model has the following technical effects:
The plunger cylinder capable of controlling the extension and retraction is characterized in that an inner hole is formed in a plunger, and an oil cylinder consisting of a piston rod, a guide sleeve and a plurality of sealing elements is arranged in the inner hole, wherein the plunger is used as an oil cylinder barrel. The guide sleeve is in threaded connection with the plunger inner hole, the piston rod is limited in the plunger inner hole, the piston rod is fixedly connected to the cylinder body by utilizing the screw, and the plunger is in limited connection with the cylinder body through the structure, so that the plunger is effectively prevented from being separated from the cylinder body in the process of installation and transportation or in the process of telescopic movement of the plunger cylinder;
According to the plunger cylinder capable of controlling extension and retraction, the oil way is arranged in the piston rod, the oil port communicated with the oil way is arranged on the cylinder body, and the oil port is communicated with the oil to control the extension and retraction of the oil cylinder, so that the plunger can be rapidly extended and stably retracted.
Drawings
FIG. 1 is a schematic view of a prior art plunger cylinder;
FIG. 2 is a schematic view of a controllable telescopic ram cylinder according to the present utility model;
FIG. 3 is a schematic diagram of a second embodiment of the controllable telescopic ram cylinder of the present utility model;
In the figure: 1-a cylinder body; 101-a first oil port; 102-a second oil port; 103-a third oil port; 2-a plunger; 3-a piston rod; 4-a guide sleeve; 5-a first chamber; 6-a second chamber; 7-screws; 8-a club head; 9-head screw.
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. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. 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.
As shown in fig. 2 to 3, the present embodiment provides a plunger cylinder capable of controlling expansion and contraction, comprising a cylinder body 1, a plunger 2 provided in the cylinder body 1, and an oil cylinder installed in the plunger 2. One end of the cylinder body 1 is closed, and the other end is opened; the plunger 2 is positioned in the cylinder body 1, is connected with the cylinder body 1 in a sliding way, and extends out of the opening of the cylinder body 1; the end face of the plunger 2, which is far away from the opening of the cylinder body 1, is provided with a cylindrical inner hole, and an oil cylinder is arranged in the inner hole; the oil cylinder comprises a piston rod 3, a guide sleeve 4 and a plunger serving as an oil cylinder barrel, wherein the piston rod 3 consists of a rod body and a piston arranged at the end part of the rod body, the piston rod 3 is positioned in an inner hole of the plunger 2, the circumferential surface of the piston is in sliding connection with the inner wall of the inner hole, one end of the piston rod 3 extends out of the inner hole of the plunger 2 and is fixedly connected with the cylinder body 1, and in the embodiment, the rod body and the piston are of an integrated structure; the guide sleeve 4 is arranged at the position, close to the lower end face of the plunger 2, of the inner hole of the plunger 2, the guide sleeve 4 is in sliding connection with the rod body of the piston rod 3 to play a role in guiding and limiting, and in the embodiment, the outer circumferential surface of the guide sleeve 4 is in threaded connection with the inner wall of the inner hole of the plunger 2. Thus, by installing the oil cylinder in the plunger 2, on one hand, the plunger 2 can be prevented from being separated from the cylinder body 1 during the installation and transportation processes of the plunger cylinder or during the telescopic movement of the plunger cylinder; on the other hand, by means of the extension and retraction of the oil cylinder, the plunger 2 can be rapidly extended and stably retracted.
In this embodiment, the inner bore of the plunger 2 is divided into a first chamber 5 and a second chamber 6 by the piston rod 3, wherein the first chamber 5 is formed between the piston rod 3 and the bottom of the inner bore of the plunger 2, and the second chamber 6 is formed between the piston rod 3 and the guide sleeve 4. The piston rod 3 is provided with two internal oil ways respectively communicated with the first chamber 5 and the second chamber 6: the first oil way is communicated with the first chamber 5, and the second oil way is communicated with the second chamber 6. The cylinder body 1 is provided with a first oil port 101 and a second oil port 102, oil in the first oil port 101 can flow into the first cavity 5 through a first oil way, and hydraulic pressure in the second oil port 102 can flow into the second cavity 6 through a second oil way, so that the expansion and contraction of the oil cylinder are realized.
In this embodiment, the cylinder 1 is further provided with a third oil port 103 for pushing the plunger 2 to extend.
In the embodiment, a slot is formed in the closed end face of the cylinder body 1, one end of the piston rod 3 is embedded into the slot, the piston rod 3 is fixedly connected with the cylinder body 1 through the screw 7, the connection limit of the plunger 2 is realized, and the plunger 2 is prevented from falling out of the cylinder body.
In order to prevent the problem of oil leakage in the running process of the plunger cylinder, sealing elements are arranged between the outer circumferential surface of the plunger 2 and the inner wall of the cylinder body 1, between the outer circumferential surface of the piston and the inner wall of the plunger 2, between the inner wall of the guide sleeve 4 and the rod body, between the outer circumferential surface of the guide sleeve 4 and the inner wall of the plunger 2 and at the joint of the piston rod 3 and the cylinder body 1.
In this embodiment, the plunger cylinder further comprises a head 8, the head 8 being connected to the plunger 2 by a head screw 9.
Based on the above structure, the working principle of the utility model is as follows:
In the process of extending the plunger 2, the third oil port 103 is used for feeding oil, the oil pushes the plunger 2 to move upwards, when the plunger 2 moves for a certain distance, a piston arranged in the plunger 2 is connected with the guide sleeve 4, and the plunger 2 stops moving due to the limiting effect of the guide sleeve 4, at the moment, the plunger 2 extends out of the maximum stroke, and the plunger 2 is prevented from being separated from the cylinder body 1 under the condition that the third oil port 103 is used for continuously supplying oil and pressurizing; in order to realize the rapid extension of the plunger 2, the first oil port 101 is also used for oil feeding when the third oil port 103 is used for oil feeding, and the oil flows into the first cavity 5 through the first oil duct to push the plunger 2 to extend.
In the retracting process of the plunger 2, the third oil port 103 returns oil, and the plunger 2 falls back under the action of gravity or external load; in order to realize stable retraction of the plunger 2, the second oil port 102 is used for oil feeding when the third oil port 103 returns oil, and the oil flows into the second cavity 6 through the second oil way to push the plunger 2 to retract.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (8)
1. The plunger cylinder capable of controlling the extension comprises a cylinder body (1), wherein one end of the cylinder body (1) is closed, and the other end of the cylinder body is provided with an opening; a plunger (2) arranged in the cylinder body (1), wherein one end of the plunger (2) extends out of the opening of the cylinder body (1); the cylinder is characterized in that a cylindrical inner hole is formed in the end face, far away from the opening of the cylinder body (1), of the plunger (2), an oil cylinder is arranged in the inner hole, and the oil cylinder comprises:
The piston rod (3) comprises a rod body and a piston arranged at the end part of the rod body, one end of the piston rod (3) is positioned in the inner hole, and the other end of the piston rod extends out of the inner hole and is fixedly connected with the cylinder body (1);
The guide sleeve (4), the guide sleeve (4) is located the lower extreme of hole, guide sleeve (4) with sliding connection between the body of rod.
2. A controllable telescopic plunger cylinder according to claim 1, characterized in that the piston rod (3) divides the inner bore into a first chamber (5) and a second chamber (6), the piston rod (3) is provided with a first oil way for communicating with the first chamber (5), and the piston rod (3) is also provided with a second oil way for communicating with the second chamber (6).
3. The plunger cylinder capable of controlling extension and retraction according to claim 2, wherein a first oil port (101) and a second oil port (102) are arranged on the cylinder body (1), the first oil port (101) is communicated with the first oil path, and the second oil port (102) is communicated with the second oil path.
4. A telescopic ram cylinder according to claim 3, characterised in that the cylinder body (1) is further provided with a third port (103).
5. A telescopic ram according to claim 1, wherein the rod is of unitary construction with the piston.
6. A controllable telescopic plunger cylinder according to claim 1, characterized in that the piston rod (3) is embedded in the cylinder body (1), the piston rod (3) and the cylinder body (1) being fixedly connected by means of screws (7).
7. A telescopic plunger cylinder according to any one of claims 1-6, wherein sealing elements are arranged between the outer circumferential surface of the plunger (2) and the inner wall of the cylinder body (1), between the outer circumferential surface of the piston and the inner wall surface of the plunger (2), between the inner wall of the guide sleeve (4) and the rod body, between the outer circumferential surface of the guide sleeve (4) and the inner wall of the inner hole of the plunger (2) and at the connection parts of the piston rod (3) and the cylinder body (1).
8. A controllable telescopic plunger cylinder according to claim 7, further comprising a rod head (8), said rod head (8) being connected to said plunger (2) by means of a rod head screw (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759523.1U CN221074827U (en) | 2023-10-16 | 2023-10-16 | Plunger cylinder capable of controlling extension and contraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759523.1U CN221074827U (en) | 2023-10-16 | 2023-10-16 | Plunger cylinder capable of controlling extension and contraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074827U true CN221074827U (en) | 2024-06-04 |
Family
ID=91271644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322759523.1U Active CN221074827U (en) | 2023-10-16 | 2023-10-16 | Plunger cylinder capable of controlling extension and contraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074827U (en) |
-
2023
- 2023-10-16 CN CN202322759523.1U patent/CN221074827U/en active Active
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