CN109340205B - Floatable oil cylinder and engineering machinery - Google Patents
Floatable oil cylinder and engineering machinery Download PDFInfo
- Publication number
- CN109340205B CN109340205B CN201811571451.5A CN201811571451A CN109340205B CN 109340205 B CN109340205 B CN 109340205B CN 201811571451 A CN201811571451 A CN 201811571451A CN 109340205 B CN109340205 B CN 109340205B
- Authority
- CN
- China
- Prior art keywords
- oil
- cavity
- piston rod
- cylinder
- ports
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005192 partition Methods 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 159
- 239000010720 hydraulic oil Substances 0.000 description 28
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
Abstract
The application relates to the technical field of engineering machinery, in particular to a floatable oil cylinder, which comprises a cylinder barrel and a piston rod, wherein the piston rod is installed in the cylinder barrel, two ends of the piston rod extend out of two ends of the cylinder barrel respectively, an inner cavity is formed in the cylinder barrel, the floatable oil cylinder further comprises a cavity partition piece, the cavity partition piece is fixed on the piston rod and is in sliding fit with the inner wall of the cylinder barrel, and the cavity partition piece divides the inner cavity into a first cavity and a second cavity which are distributed in the axial direction of the piston rod. The application can solve the technical problem that the oil return quantity of the rod-shaped chamber and the rodless chamber of the existing oil cylinder is different and is difficult to float.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a floatable oil cylinder and engineering machinery.
Background
At present, the oil cylinder is widely applied in the field of engineering machinery, the hydraulic oil cylinder can play the functions of power support, mechanism movement, folding mechanism and the like, the stability and the safety of a working device can be locked and improved through the balance valve, the use is very convenient, a large number of uses are obtained in the field of engineering machinery, and the hydraulic oil cylinder is widely applied to a long spiral drilling machine. However, the interior of the oil cylinder is generally divided into a rod cavity and a rodless cavity at present, oil returns of the two cavities are difficult to float, the oil cylinder can only stretch and retract under the control of hydraulic pressure, and follow-up work is difficult to be carried out along with a host machine.
Disclosure of Invention
The application provides a floatable oil cylinder and engineering machinery, which are used for solving the technical problem that oil returns of a rod cavity and a rodless cavity of the existing oil cylinder are different and are difficult to float.
In order to achieve the above purpose, the present application adopts the following technical scheme:
one aspect of the present application provides a floatable cylinder comprising a cylinder and a piston rod mounted in the cylinder with both ends of the piston rod extending from both ends of the cylinder, respectively, an inner cavity being formed in the cylinder,
the piston rod is provided with a piston rod, and the piston rod is provided with a cavity separating piece which is fixed on the piston rod and is in sliding fit with the inner wall of the cylinder barrel, and the cavity separating piece separates the inner cavity into a first cavity and a second cavity which are distributed in the axial direction of the piston rod.
Preferably, a first oil port communicated with the first cavity and a second oil port communicated with the second cavity are arranged on the cylinder barrel,
the hydraulic balance valve is provided with two first balance valve working oil ports, two second balance valve working oil ports and two balance valve control oil ports,
the two first balance valve working oil ports are respectively connected with the first oil port and the second oil port.
The beneficial effect of this technical scheme lies in: if the floatable oil cylinder is required to stretch out and draw back under hydraulic control, one of the two working oil ports of the second balance valve is connected with a pressure oil source, the other is connected with an oil tank to realize oil return, the two control oil ports of the balance valve are connected with a control oil path, hydraulic oil is introduced into the control oil path, and hydraulic oil is introduced into the floatable oil cylinder through the pressure oil source, so that the floatable oil cylinder can stretch out and draw back under hydraulic control; if the floatable oil cylinder is required to float, the control oil ports of the two balance valves are connected with the control oil path, the working oil ports of the two second balance valves are communicated, and hydraulic oil is introduced into the control oil path, so that the hydraulic oil can flow between the first cavity and the second cavity, and further the floatable oil cylinder can float.
Preferably, the three-position four-way reversing valve further comprises two first reversing valve working oil ports which are respectively communicated with the two second balancing valve working oil ports, and the three-position four-way reversing valve is provided with a working position which enables the two second balancing valve working oil ports to be communicated.
The beneficial effect of this technical scheme lies in: through the reversing of the three-position four-way reversing valve, hydraulic oil can be introduced into the first cavity and hydraulic oil can be introduced into the second cavity to be switched, so that the two ends of the piston rod can work circularly. When the three-position four-way reversing valve is switched to a working position for communicating the working oil ports of the two second balance valves, the floating of the floatable oil cylinder can be realized.
Preferably, the balance valve further comprises a control oil path and a switching valve, wherein the control oil path is communicated with the control oil ports of the two balance valves, and the switching valve is arranged on the control oil path.
The beneficial effect of this technical scheme lies in: the control of the hydraulic control balance valve is conveniently realized, and oil inlet and oil return and floating of the floatable oil cylinder are conveniently controlled.
Preferably, a first oil port communicated with the first cavity and a second oil port communicated with the second cavity are arranged on the cylinder barrel,
the hydraulic lock is provided with two first hydraulic lock working oil ports, two second hydraulic lock working oil ports and two hydraulic lock control oil ports, and the two first hydraulic lock working oil ports are respectively connected with the first oil ports and the second oil ports.
The beneficial effect of this technical scheme lies in: if the floatable oil cylinder is required to stretch out and draw back under the hydraulic control, one of the two second hydraulic lock working oil ports is connected with a pressure oil source, the other is connected with an oil tank to realize oil return, the two hydraulic lock control oil ports are connected with a control oil path, hydraulic oil is introduced into the control oil path, and hydraulic oil is introduced into the floatable oil cylinder through the pressure oil source, so that the floatable oil cylinder can stretch out and draw back under the hydraulic control; if the floatable oil cylinder is required to float, the two hydraulic lock control oil ports are connected with the control oil path, the two second hydraulic lock working oil ports are communicated, and hydraulic oil is introduced into the control oil path, so that the hydraulic oil can flow between the first cavity and the second cavity, and further the floatable oil cylinder can float.
Preferably, the three-position four-way reversing valve further comprises two first reversing valve working oil ports which are respectively communicated with the two second hydraulic lock working oil ports, and the three-position four-way reversing valve is provided with a working position which enables the two second hydraulic lock working oil ports to be communicated.
The beneficial effect of this technical scheme lies in: through the reversing of the three-position four-way reversing valve, hydraulic oil can be introduced into the first cavity and hydraulic oil can be introduced into the second cavity to be switched, so that the two ends of the piston rod can work circularly. When the three-position four-way reversing valve is switched to the working positions of the working oil ports of the two second hydraulic locks, the floating of the floatable oil cylinder can be realized.
Preferably, the hydraulic lock further comprises a control oil path and a switching valve, wherein the control oil path is communicated with the two hydraulic lock control oil ports, and the switching valve is arranged on the control oil path.
The beneficial effect of this technical scheme lies in: the hydraulic lock is conveniently controlled, and oil inlet and oil return and floating of the floatable oil cylinder are conveniently controlled.
Preferably, the cavity partition member is disc-shaped, and the outer edge of the cavity partition member is attached to the inner wall of the inner cavity.
The beneficial effect of this technical scheme lies in: this minimizes the occupation of the inner cavity space by the cavity divider.
Preferably, there are at least two of the chamber partitions, each of the chamber partitions being distributed in an axial direction of the piston rod.
The beneficial effect of this technical scheme lies in: this further provides a better seal between the first and second chambers by the chamber divider, preventing hydraulic oil from flowing between the first and second chambers at the chamber divider.
Another aspect of the present application provides an engineering machine including the floatable cylinder described above.
The technical scheme provided by the application can achieve the following beneficial effects:
according to the floatable oil cylinder, the first cavity and the second cavity are rod cavities, so that oil return amounts of the first cavity and the second cavity are the same, the oil cylinder can stretch and retract under hydraulic control, and can float, and further follow-up work along with a host machine is realized; moreover, both ends of the piston rod can be used for transmitting power, so that the first cavity and the second cavity alternately feed oil, and both ends of the piston rod can work in a circulating way.
Additional features and advantages of the application will be set forth in the description which follows, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are used in the description of the embodiments will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are of some embodiments of the application and that other drawings may be derived from these drawings without undue effort.
FIG. 1 is a schematic diagram of a floatable cylinder according to an embodiment of the present application;
fig. 2 is a schematic diagram of a hydraulic principle of a floatable cylinder according to an embodiment of the present application.
Reference numerals:
1-a hydraulic lock;
2-controlling an oil way;
3-switching a valve;
4-three-position four-way reversing valve;
5-a floatable cylinder;
51-a first oil port;
52-a second oil port;
53-piston rod;
54-cylinder barrel;
55-chamber divider;
56-lumen;
6-a hydraulically controlled balancing valve;
61-a second balance valve working oil port;
62-a balance valve control oil port;
63-a first balance valve working oil port.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-2, one aspect of the present application provides a floatable cylinder comprising a cylinder 54 and a piston rod 53, the piston rod 53 being mounted in the cylinder 54, and both ends of the piston rod 53 respectively protruding from both ends of the cylinder 54, an inner cavity 56 being formed in the cylinder 54,
also included is a chamber divider 55, the chamber divider 55 being fixed to the piston rod 53 and being in sliding engagement with the inner wall of the cylinder tube 54, and the chamber divider 55 dividing the inner chamber 56 into a first chamber and a second chamber distributed in the axial direction of the piston rod 53.
According to the floatable oil cylinder 5 provided by the embodiment of the application, the first cavity and the second cavity are rod cavities, so that the oil return amounts of the first cavity and the second cavity are the same, the oil cylinder can stretch and retract under hydraulic control, and can float, and further follow-up work along with a host machine is realized; moreover, both ends of the piston rod 53 can be used for transmitting power, so that the first cavity and the second cavity are alternately filled with oil, and both ends of the piston rod 53 can work circularly.
Preferably, a first oil port 51 communicating with the first chamber and a second oil port 52 communicating with the second chamber are provided on the cylinder tube 54,
also comprises a hydraulic balance valve 6, wherein the hydraulic balance valve 6 is provided with two first balance valve working oil ports 63, two second balance valve working oil ports 61 and two balance valve control oil ports 62,
the two first balance valve operating ports 63 are connected to the first port 51 and the second port 52, respectively.
When the hydraulic control device is used, if the floatable oil cylinder 5 is required to stretch and retract under the hydraulic control, one of the two second balance valve working oil ports 61 is connected with a pressure oil source, the other is connected with an oil tank to realize oil return, the two balance valve control oil ports 62 are connected with the control oil path 2, hydraulic oil is introduced into the control oil path 2, and hydraulic oil is introduced into the floatable oil cylinder 5 through the pressure oil source, so that the floatable oil cylinder 5 can stretch and retract under the hydraulic control; if the floatable oil cylinder 5 is required to float, the two balance valve control oil ports 62 are connected with the control oil path 2, and the two second balance valve working oil ports 61 are communicated, and hydraulic oil is introduced into the control oil path 2, so that the hydraulic oil can flow between the first cavity and the second cavity, and further the floatable oil cylinder 5 can float.
Preferably, the floatable cylinder 5 provided by the embodiment of the present application further includes a three-position four-way reversing valve 4, where the three-position four-way reversing valve 4 has two first reversing valve working ports respectively communicated with two second balancing valve working ports 61, and the three-position four-way reversing valve 4 has a working position for communicating the two second balancing valve working ports 61. The switching between the feeding of hydraulic oil into the first cavity and the feeding of hydraulic oil into the second cavity can be realized through the reversing of the three-position four-way reversing valve 4, so that the circulating work at the two ends of the piston rod 53 is realized. When the three-position four-way selector valve 4 is switched to the operating position in which the two second balance valve operating ports 61 communicate, the floatable cylinder 5 can be floated.
Preferably, the floatable cylinder 5 provided by the embodiment of the present application further includes a control oil path 2 and an on-off valve 3, the control oil path 2 is communicated with two control oil ports 62 of the balance valve, and the on-off valve 3 is installed on the control oil path 2. This facilitates the control of the hydraulically controlled balancing valve 6 and thus the control of the oil intake and return and float of the floatable cylinder 5.
In addition to the hydraulically controlled balancing valve 6 described above, it is also preferable to use a hydraulic lock 1, in particular a cylinder 54 provided with a first port 51 communicating with the first chamber and a second port 52 communicating with the second chamber,
the hydraulic lock 1 is provided with two first hydraulic lock working oil ports, two second hydraulic lock working oil ports and two hydraulic lock control oil ports, and the two first hydraulic lock working oil ports are respectively connected with the first oil port 51 and the second oil port 52.
When the hydraulic control device is used, if the floatable oil cylinder 5 is required to stretch and retract under the hydraulic control, one of the two second hydraulic lock working oil ports is connected with a pressure oil source, the other is connected with an oil tank to realize oil return, the two hydraulic lock control oil ports are connected with the control oil path 2, hydraulic oil is introduced into the control oil path 2, and hydraulic oil is introduced into the floatable oil cylinder 5 through the pressure oil source, so that the floatable oil cylinder 5 can stretch and retract under the hydraulic control; if the floatable oil cylinder 5 is required to float, the two hydraulic lock control oil ports are connected with the control oil way 2, and the two second hydraulic lock working oil ports are communicated, and hydraulic oil is introduced into the control oil way 2, so that the hydraulic oil can flow between the first cavity and the second cavity, and further the floatable oil cylinder 5 can float.
Preferably, the floatable cylinder 5 provided by the embodiment of the present application further includes a three-position four-way reversing valve 4, where the three-position four-way reversing valve 4 has two first reversing valve working ports respectively communicated with the two second hydraulic lock working ports, and the three-position four-way reversing valve 4 has a working position for communicating the two second hydraulic lock working ports. The switching between the feeding of hydraulic oil into the first cavity and the feeding of hydraulic oil into the second cavity can be realized through the reversing of the three-position four-way reversing valve 4, so that the circulating work at the two ends of the piston rod 53 is realized. When the three-position four-way reversing valve 4 is switched to the working position of the two second hydraulic lock working oil ports, the floatable oil cylinder 5 can be floated.
Preferably, the floatable cylinder 5 provided by the embodiment of the application further comprises a control oil path 2 and a switch valve 3, wherein the control oil path 2 is communicated with two hydraulic lock control oil ports, and the switch valve 3 is installed on the control oil path 2. This facilitates the control of the hydraulic lock 1 and thus the control of the oil feed and return and float of the floatable cylinder 5.
Preferably, the chamber separator 55 is disc-shaped, and the outer edge of the chamber separator 55 is attached to the inner wall of the inner cavity 56. This minimizes the occupation of the space of the inner cavity 56 by the chamber divider 55.
Preferably, there are at least two chamber partitions 55, and each of the chamber partitions 55 is distributed in the axial direction of the piston rod 53. This further provides a better seal between the first and second chambers by the chamber divider 55, preventing hydraulic oil from flowing between the first and second chambers at the chamber divider 55.
Another aspect of the present application provides a construction machine, including the floatable cylinder 5 provided in the above embodiment of the present application.
The work machine may preferably be a long auger. By using the floatable oil cylinder 5 provided by the embodiment of the application, the first cavity and the second cavity of the floatable oil cylinder 5 are both rod cavities, so that the oil return amounts of the first cavity and the second cavity are the same, the oil cylinder can stretch and retract under hydraulic control, and can float, and further follow-up work of a host machine is realized; moreover, both ends of the piston rod 53 can be used for transmitting power, so that the first cavity and the second cavity are alternately filled with oil, and both ends of the piston rod 53 can work circularly.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Furthermore, those skilled in the art will appreciate that while some of the embodiments described above include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. Furthermore, the information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (5)
1. The floatable oil cylinder is characterized by comprising a cylinder barrel (54) and a piston rod (53), wherein the piston rod (53) is arranged in the cylinder barrel (54), two ends of the piston rod (53) respectively extend out from two ends of the cylinder barrel (54), an inner cavity (56) is formed in the cylinder barrel (54),
also comprises a chamber partition member (55), wherein the chamber partition member (55) is fixed on the piston rod (53) and is in sliding fit with the inner wall of the cylinder barrel (54), the chamber partition member (55) divides the inner cavity (56) into a first cavity and a second cavity which are distributed in the axial direction of the piston rod (53),
a first oil port (51) communicated with the first cavity and a second oil port (52) communicated with the second cavity are arranged on the cylinder barrel (54),
the hydraulic balance valve (6) is provided with two first balance valve working oil ports (63), two second balance valve working oil ports (61) and two balance valve control oil ports (62),
the two first balance valve working oil ports (63) are respectively connected with the first oil port (51) and the second oil port (52),
the three-position four-way reversing valve (4) is also included, the three-position four-way reversing valve (4) is provided with two first reversing valve working oil ports which are respectively communicated with the two second balancing valve working oil ports (61), the three-position four-way reversing valve (4) is provided with a working position which enables the two second balancing valve working oil ports (61) to be communicated,
the balance valve further comprises a control oil circuit (2) and a switch valve (3), wherein the control oil circuit (2) is communicated with the two balance valve control oil ports (62), and the switch valve (3) is installed on the control oil circuit (2).
2. The floatable oil cylinder is characterized by comprising a cylinder barrel (54) and a piston rod (53), wherein the piston rod (53) is arranged in the cylinder barrel (54), two ends of the piston rod (53) respectively extend out from two ends of the cylinder barrel (54), an inner cavity (56) is formed in the cylinder barrel (54),
also comprises a chamber partition member (55), wherein the chamber partition member (55) is fixed on the piston rod (53) and is in sliding fit with the inner wall of the cylinder barrel (54), the chamber partition member (55) divides the inner cavity (56) into a first cavity and a second cavity which are distributed in the axial direction of the piston rod (53),
a first oil port (51) communicated with the first cavity and a second oil port (52) communicated with the second cavity are arranged on the cylinder barrel (54),
the hydraulic lock (1) is provided with two first hydraulic lock working oil ports, two second hydraulic lock working oil ports and two hydraulic lock control oil ports, the two first hydraulic lock working oil ports are respectively connected with the first oil port (51) and the second oil port (52),
the three-position four-way reversing valve (4) is also included, the three-position four-way reversing valve (4) is provided with two first reversing valve working oil ports which are respectively communicated with the two second hydraulic lock working oil ports, the three-position four-way reversing valve (4) is provided with a working position which enables the two second hydraulic lock working oil ports to be communicated,
the hydraulic lock further comprises a control oil way (2) and a switch valve (3), wherein the control oil way (2) is communicated with two hydraulic lock control oil ports, and the switch valve (3) is installed on the control oil way (2).
3. Floatable cylinder (5) according to claim 1 or 2, characterized in that the chamber divider (55) is disc-shaped, the outer edge of the chamber divider (55) being in abutment with the inner wall of the inner cavity (56).
4. A floatable cylinder according to claim 3, characterized in that there are at least two of the chamber partitions (55), each of the chamber partitions (55) being distributed in the axial direction of the piston rod (53).
5. A construction machine comprising a floatable cylinder as claimed in any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571451.5A CN109340205B (en) | 2018-12-21 | 2018-12-21 | Floatable oil cylinder and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571451.5A CN109340205B (en) | 2018-12-21 | 2018-12-21 | Floatable oil cylinder and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340205A CN109340205A (en) | 2019-02-15 |
| CN109340205B true CN109340205B (en) | 2023-10-24 |
Family
ID=65302847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811571451.5A Active CN109340205B (en) | 2018-12-21 | 2018-12-21 | Floatable oil cylinder and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340205B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536948A (en) * | 2012-01-10 | 2012-07-04 | 徐州重型机械有限公司 | Oil cylinder as well as suspension arm stretching system and crane provided therewith |
| CN202418091U (en) * | 2012-01-10 | 2012-09-05 | 徐州重型机械有限公司 | Oil cylinder and suspension arm extension system with same and crane with same |
| CN203532390U (en) * | 2013-10-31 | 2014-04-09 | 长沙中联消防机械有限公司 | Hydraulic cylinder quick motion loop and engineering machine |
| CN104047914A (en) * | 2014-07-03 | 2014-09-17 | 戴纳派克（中国）压实摊铺设备有限公司 | Floating screed control system of paver and paver |
| CN205047557U (en) * | 2015-06-16 | 2016-02-24 | 徐工集团工程机械股份有限公司 | Anti -tilt device , hydraulic system and aerial working platform equipment |
| CN106006413A (en) * | 2016-08-08 | 2016-10-12 | 中联重科股份有限公司 | Telescopic arm hydraulic control circuit and engineering machinery using the same |
| CN106321538A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Anti-tipping device, hydraulic system, aerial work platform equipment and rotation center body |
| RU168587U1 (en) * | 2015-10-15 | 2017-02-09 | Общество с ограниченной ответственностью Финансово-промышленная компания "Космос-Нефть-Газ" | HYDRAULIC DRIVE BALL VALVE |
| CN107795535A (en) * | 2017-11-28 | 2018-03-13 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its floating hydraulic control system |
| CN209261945U (en) * | 2018-12-21 | 2019-08-16 | 北京三一智造科技有限公司 | It can floating cylinder and engineering machinery |
-
2018
- 2018-12-21 CN CN201811571451.5A patent/CN109340205B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536948A (en) * | 2012-01-10 | 2012-07-04 | 徐州重型机械有限公司 | Oil cylinder as well as suspension arm stretching system and crane provided therewith |
| CN202418091U (en) * | 2012-01-10 | 2012-09-05 | 徐州重型机械有限公司 | Oil cylinder and suspension arm extension system with same and crane with same |
| CN203532390U (en) * | 2013-10-31 | 2014-04-09 | 长沙中联消防机械有限公司 | Hydraulic cylinder quick motion loop and engineering machine |
| CN104047914A (en) * | 2014-07-03 | 2014-09-17 | 戴纳派克（中国）压实摊铺设备有限公司 | Floating screed control system of paver and paver |
| CN205047557U (en) * | 2015-06-16 | 2016-02-24 | 徐工集团工程机械股份有限公司 | Anti -tilt device , hydraulic system and aerial working platform equipment |
| CN106321538A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Anti-tipping device, hydraulic system, aerial work platform equipment and rotation center body |
| RU168587U1 (en) * | 2015-10-15 | 2017-02-09 | Общество с ограниченной ответственностью Финансово-промышленная компания "Космос-Нефть-Газ" | HYDRAULIC DRIVE BALL VALVE |
| CN106006413A (en) * | 2016-08-08 | 2016-10-12 | 中联重科股份有限公司 | Telescopic arm hydraulic control circuit and engineering machinery using the same |
| CN107795535A (en) * | 2017-11-28 | 2018-03-13 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its floating hydraulic control system |
| CN209261945U (en) * | 2018-12-21 | 2019-08-16 | 北京三一智造科技有限公司 | It can floating cylinder and engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109340205A (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8464757B2 (en) | Hydraulic valve device | |
| US3800669A (en) | Control valve arrangement for a hydraulic drive | |
| CN109340205B (en) | Floatable oil cylinder and engineering machinery | |
| ES2734307T3 (en) | Hydraulic pressure intensifier | |
| CN102312457B (en) | Pressure-feedback-type hydraulic impactor | |
| CN105443499A (en) | Multi-stage telescopic oil cylinder, control method thereof and crane | |
| KR20200060502A (en) | Travel motor changeover valve, travel motor and civil machinery | |
| KR20150031902A (en) | Dual acting cylinder | |
| CN107061404B (en) | Direction switching valve and hydraulic system | |
| EP3369930A1 (en) | Double acting hydraulic pressure intensifier | |
| CN205446261U (en) | Multistage flexible hydro -cylinder and hoist | |
| CN209261945U (en) | It can floating cylinder and engineering machinery | |
| US2684038A (en) | Piston pump | |
| US7685927B1 (en) | Hydraulic synchronizing cylinder | |
| CN112833061A (en) | Control valve assembly of engineering machinery and engineering machinery with control valve assembly | |
| JPWO2018100911A1 (en) | Screw compressor | |
| US3348494A (en) | Rotary piston machine | |
| CN212272675U (en) | Double-hydraulic cylinder structure | |
| CN104085446B (en) | Vehicle and wheel steering system thereof | |
| CN106006413A (en) | Telescopic arm hydraulic control circuit and engineering machinery using the same | |
| IT202000002683U1 (en) | CARTRIDGE HYDRAULIC VALVE | |
| US7114433B2 (en) | Valve stack having a pattern switching valve | |
| RU2044841C1 (en) | Hydraulic system of mobile machine | |
| CN214404166U (en) | Control valve assembly of engineering machinery and engineering machinery with control valve assembly | |
| US11378192B2 (en) | Valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |