CN210660815U - Constant-speed differential variable oil cylinder - Google Patents
Constant-speed differential variable oil cylinder Download PDFInfo
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- CN210660815U CN210660815U CN201921387194.XU CN201921387194U CN210660815U CN 210660815 U CN210660815 U CN 210660815U CN 201921387194 U CN201921387194 U CN 201921387194U CN 210660815 U CN210660815 U CN 210660815U
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- 239000003921 oil Substances 0.000 claims description 107
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to a variable hydro-cylinder of constant velocity differential, the internal inner piston chamber that has of combination that the main piston of this hydro-cylinder and piston rod constitute, the inner piston intracavity has the inner piston, the rear end in inner piston chamber is through the rodless chamber intercommunication of first runner with the cylinder, the front end in inner piston chamber is through the second runner and the cylinder have the pole chamber intercommunication, the setting of staggering with first runner is said in the inner piston, the spring still has in the inner piston chamber, promote the inner piston on the inner piston including the spring action and remove to the inner piston chamberThe rear end of the cylinder is closed with a first flow passage, and the inner diameter a of the cylinder is
The outer diameter b of the piston rod is D. The combination body is also internally provided with a control piston rod, a control piston cavity and a control oil duct, the control piston rod can extend into the inner piston cavity to push the inner piston to move backwards, and the extension of the control piston rod is controlled by the oil pressure introduced through the control oil duct. The beneficial effects are that: the oil cylinder can be changed into a constant-speed and differential dual-purpose oil cylinder by controlling the oil pressure introduced by the oil duct, and the requirements of specific working conditions are met.
Description
Technical Field
The utility model relates to a hydraulic cylinder technical field, especially a variable hydro-cylinder of constant speed differential.
Background
The constant-speed oil cylinder means that the extending and retracting time of the piston rod is the same. The differential oil cylinder is characterized in that the extending and retracting time of a piston rod is different, and the constant-speed oil cylinder in the prior art is generally in a double-out-rod form or an inner-inserting-rod form. The oil cylinder in the double-rod form has relatively large volume, and the installation form can only adopt the form of a middle trunnion; the structure of the inner inserted rod type is complex, the processing requirement is high, the stretching speed is slightly different, and a constant speed differential variable oil cylinder is not seen in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provided is a constant velocity differential variable cylinder having a compact structure.
The utility model provides a technical scheme that its technical problem adopted is: the constant-speed differential variable oil cylinder comprises a cylinder barrel, a main piston and a piston rod, wherein the main piston is arranged in the cylinder barrel, the rear end of the piston rod is connected with the main piston, the front end of the piston rod extends out of the cylinder barrel, an inner piston cavity is formed in a combined body formed by the main piston and the piston rod, an inner piston is arranged in the inner piston cavity, the rear end of the inner piston cavity is communicated with a rodless cavity of the cylinder barrel through a first flow passage, the front end of the inner piston cavity is communicated with a rod cavity of the cylinder barrel through a second flow passage, the inner piston is provided with a through passage, the through passage of the inner piston is arranged in a staggered mode with the first flow passage, a spring is further arranged in the inner piston cavity, the spring acts on the inner piston to push the inner piston to move to the rear end
The outer diameter b of the piston rod is D, a control piston rod, a control piston cavity and a control oil duct are further arranged in the combined body, the control piston rod is arranged in the control piston cavity, and the rear end of the control piston cavity isThe second flow channel is composed of flow channels which are communicated with each other and are respectively arranged in the control piston rod and the combination body, and the communication parts of the flow channels in the control piston rod and the combination body are arranged on the side surface of the control piston rod. The oil pressure introduced by the control oil duct controls the extension of the control piston rod, so that the constant-speed differential variable oil cylinder can be changed between the constant-speed oil cylinder and the differential oil cylinder.
Specifically, the control piston cavity is located at the rear end of the piston rod, the inner piston cavity is located in the main piston, an end cover for plugging the inner piston cavity is arranged on the rear end face of the main piston, and the first flow channel is arranged on the end cover.
In order to realize the manual switching of the oil cylinder between the constant speed working state and the differential working state, the oil port of the control oil channel is further limited, and the oil pressure of the hydraulic oil of the control oil channel is adjusted by screwing in or screwing out the adjusting screw.
Specifically, the flow passage in the control piston rod is composed of an axial oil hole extending in the axial direction in the center of the control piston rod and a radial oil hole extending in the radial direction of the control piston rod and communicated with the axial oil hole, the flow passage in the combined body is composed of a ring groove surrounding the control piston cavity and a radial oil hole extending in the radial direction of the combined body and communicated with the ring groove, and the axial oil hole of the control piston rod is coaxial with the through passage of the inner piston.
Specifically, the constant-speed differential variable oil cylinder is a double-acting single-piston-rod hydraulic oil cylinder.
The utility model has the advantages that: the oil cylinder can be changed into a constant-speed and differential dual-purpose oil cylinder by controlling the oil pressure introduced by the oil duct, and the requirements of specific working conditions are met.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of embodiment 2 of the present invention.
In the figure, 1 is a piston rod, 2 is a control piston rod, 3 is a main piston, 4 is a spring, 5 is an inner piston, 6 is an end cover, 7 is an adjusting screw, 8 is a cylinder barrel, 9 is a first flow passage, 10 is a second flow passage, and 11 is a control oil passage.
Detailed Description
In particular, the control piston cavity is located at the rear end of the piston rod 1. The inner piston cavity is located in the main piston 3, an end cover 6 for blocking the inner piston cavity is arranged on the rear end face of the main piston 3, and a first flow passage 9 is arranged on the end cover 6. The two ends of the constant-speed differential variable oil cylinder are provided with a rod cavity oil port and a rodless cavity oil port.
Still have control piston rod 2, control piston chamber and control oil duct 11 in the combination body, control piston rod 2 sets up in the control piston intracavity, and control piston chamber rear end and interior piston chamber intercommunication make control piston rod 2 protractile promote interior piston 5 and remove, and the front end and the control oil duct 11 intercommunication in control piston chamber, the hydraulic fluid port of control oil duct 11 are located the front end of piston rod 1.
The second flow passage 10 is composed of flow passages which are communicated with each other and are respectively positioned in the control piston rod 2 and the combined body, and the communication part of the control piston rod 2 and the flow passages in the combined body is positioned on the side surface of the control piston rod 2.
Specifically, the flow passage in the control piston rod 2 is composed of an axial oil hole extending in the axial direction in the center of the control piston rod 2 and a radial oil hole extending in the radial direction of the control piston rod 2 and communicating with the axial oil hole, the flow passage in the combined body is composed of a ring groove surrounding the control piston cavity and a radial oil hole extending in the radial direction of the combined body and communicating with the ring groove, and the axial oil hole of the control piston rod 2 is coaxial with the through passage of the inner piston 5.
The oil port of the control oil duct 11 is connected with an external oil path, so that the control of the control piston rod 2 is realized.
When the oil cylinder is required to be used as a constant-speed oil cylinder, the control oil passage 11 is not communicated with oil, the control piston rod 2 is in an initial position, and the inner piston 5 can move under the action of the rodless cavity oil pressure P2.
The principle that the oil cylinder can be used as a constant-speed oil cylinder is as follows:
when the oil inlet of the oil port of the rod cavity is formed, the inner piston 5 is tightly attached to the end cover 6, the oil pressure P1 of the rod cavity cannot enter the rodless cavity from the rod cavity, the piston rod 1 outputs a pulling force F, and the effective action area of the oil pressure P1 of the rod cavity is the area between the inner diameter a of the cylinder barrel 8 and the outer diameter b of the piston rod 1.
Tension force
When the oil inlet of the rodless cavity is performed, the inner piston 5 is pushed away from the end cover 6 by the rodless cavity oil pressure P2, the rod cavity is communicated with the rodless cavity, the piston rod 1 outputs the thrust force f, and the effective action area of the rodless cavity oil pressure P2 is the sectional area of the piston rod 1.
Thrust force
When P1 is equal to P2, F is equal to F, and the oil cylinder is a constant speed oil cylinder.
When the oil cylinder needs to be used as a differential oil cylinder, the external oil circuit leads control oil pressure P3 to the control oil passage 11, the control oil pressure P3 pushes the control piston rod 2 to extend out to contact the inner piston 5, the control piston rod 2 pushes the inner piston 5 to be attached to the end cover 6, and the locking of the inner piston 5 is realized by locking the control oil pressure P3 in the control oil passage 11 or keeping a pressure which is larger than the oil pressure P2 of the rodless cavity.
The principle that the oil cylinder can be used as a differential oil cylinder is as follows:
the external oil circuit leads control oil pressure P3 to the control oil passage 11, the inner piston 5 is locked by the control piston rod 2, and the oil pressure of the rod cavity and the oil pressure of the rodless cavity cannot be communicated.
When the oil inlet of the oil port of the rod cavity is formed, the piston rod 1 outputs a pulling force F, and the effective acting area of the oil pressure P1 of the rod cavity is the area between the inner diameter a of the cylinder barrel and the outer diameter b of the piston rod.
Tension force
When the oil inlet of the rodless cavity oil port is performed, the piston rod 1 outputs thrust f, and the effective action area of the rodless cavity oil pressure P2 is the sectional area of the main piston.
Thrust force
When P1 is equal to P2, F is not equal to F, and the oil cylinder is a differential oil cylinder.
Example 2, as shown in fig. 2, differs from example 1 in the following points: an adjusting screw 7 is installed on an oil port of the control oil passage 11, the control oil passage 11 is filled with hydraulic oil, and the control oil pressure P3 of the hydraulic oil of the control oil passage 11 is adjusted by screwing in or screwing out the adjusting screw 7. When the adjusting screw 7 is screwed in, the control oil pressure P3 rises, the control oil pressure P3 pushes the control piston rod 2 to lock the inner piston 5, the oil cylinder is switched to be a differential oil cylinder, when the adjusting screw 7 is screwed out, the control oil pressure P3 decreases, the control piston rod 2 retracts, the inner piston 5 is unlocked,
the utility model discloses a pneumatic cylinder is applicable to pneumatic cylinder, servo pneumatic cylinder as wind generating set and hydraulic pressure heavy load robot.
Claims (5)
1. The utility model provides a variable hydro-cylinder of constant speed differential, includes cylinder (8), main piston (3) and piston rod (1), and main piston (3) set up in cylinder (8), and the rear end and the main piston (3) of piston rod (1) are connected, and cylinder (8), characterized by are stretched out to the front end of piston rod (1): an inner piston cavity is arranged in a combined body formed by the main piston (3) and the piston rod (1), an inner piston (5) is arranged in the inner piston cavity, the rear end of the inner piston cavity is communicated with a rodless cavity of the cylinder barrel (8) through a first flow passage (9), the front end of the inner piston cavity is communicated with a rod cavity of the cylinder barrel (8) through a second flow passage (10),
the inner piston (5) is provided with a through passage, the through passage of the inner piston (5) is staggered with the first flow passage (9), a spring (4) is also arranged in the inner piston cavity, the spring (4) acts on the inner piston (5) to push the inner piston (5) to move to the rear end of the inner piston cavity to seal the first flow passage (9),
the inner diameter a of the cylinder (8) is
The outer diameter b of the piston rod (1) is D,
the combined body is also internally provided with a control piston rod (2), a control piston cavity and a control oil duct (11), the control piston rod (2) is arranged in the control piston cavity, the rear end of the control piston cavity is communicated with the inner piston cavity, so that the control piston rod (2) can extend into the inner piston cavity to push the inner piston (5) to move backwards, the front end of the control piston cavity is communicated with the control oil duct (11), an oil port of the control oil duct (11) is positioned at the front end part of the piston rod (1),
the second flow passage (10) is composed of flow passages which are communicated with each other and are respectively positioned in the control piston rod (2) and the combined body, and the communication part of the flow passages in the control piston rod (2) and the combined body is positioned on the side surface of the control piston rod (2).
2. The constant velocity differential variable cylinder according to claim 1, characterized in that: the control piston cavity is located at the rear end of the piston rod (1), the inner piston cavity is located in the main piston (3), an end cover (6) for plugging the inner piston cavity is arranged on the rear end face of the main piston (3), and the first flow channel (9) is arranged on the end cover (6).
3. The constant velocity differential variable cylinder according to claim 1, characterized in that: an adjusting screw (7) is installed on an oil port of the control oil duct (11), and the oil pressure of hydraulic oil of the control oil duct (11) is adjusted by screwing in or screwing out the adjusting screw (7).
4. The constant velocity differential variable cylinder according to claim 2, characterized in that: the flow passage in the control piston rod (2) is composed of an axial oil hole extending along the axial direction in the center of the control piston rod (2) and a radial oil hole which is communicated with the axial oil hole and extends along the radial direction of the control piston rod (2), the flow passage in the combination is composed of a ring groove surrounding a control piston cavity and a radial oil hole which is communicated with the ring groove and extends along the radial direction of the combination, and the axial oil hole of the control piston rod (2) is coaxial with the through passage of the inner piston (5).
5. The constant velocity differential variable cylinder according to claim 1, 2, 3 or 4, characterized in that: the constant-speed differential variable oil cylinder is a double-acting single-piston-rod hydraulic oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921387194.XU CN210660815U (en) | 2019-08-23 | 2019-08-23 | Constant-speed differential variable oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921387194.XU CN210660815U (en) | 2019-08-23 | 2019-08-23 | Constant-speed differential variable oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210660815U true CN210660815U (en) | 2020-06-02 |
Family
ID=70821802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921387194.XU Withdrawn - After Issue CN210660815U (en) | 2019-08-23 | 2019-08-23 | Constant-speed differential variable oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210660815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566535A (en) * | 2019-08-23 | 2019-12-13 | 格力乐液压***(常州)有限公司 | Constant speed differential variable oil cylinder |
-
2019
- 2019-08-23 CN CN201921387194.XU patent/CN210660815U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566535A (en) * | 2019-08-23 | 2019-12-13 | 格力乐液压***(常州)有限公司 | Constant speed differential variable oil cylinder |
| CN110566535B (en) * | 2019-08-23 | 2024-02-20 | 格力乐液压***(常州)有限公司 | Constant speed differential speed variable oil cylinder |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200602 Effective date of abandoning: 20240220 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200602 Effective date of abandoning: 20240220 |