EP3344881A1 - Hydromechanical blocking cylinder and hydraulic control system for actuating same - Google Patents
Hydromechanical blocking cylinder and hydraulic control system for actuating sameInfo
- Publication number
- EP3344881A1 EP3344881A1 EP17791292.0A EP17791292A EP3344881A1 EP 3344881 A1 EP3344881 A1 EP 3344881A1 EP 17791292 A EP17791292 A EP 17791292A EP 3344881 A1 EP3344881 A1 EP 3344881A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- piston
- valve
- cylinder according
- locking part
- 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.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 title abstract description 6
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding valves
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
- F15B15/264—Screw mechanisms attached to the piston
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3052—Shuttle valves
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
- F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
Definitions
- the invention relates to a hydromechanical locking cylinder - which is also referred to as a locking cylinder - according to the preamble of claim 1 and a hydraulic control system for its actuation according to claim 12.
- a generic hydromechanical locking cylinder is from the
- EP 1 864 024 B1 a rotary sleeve connected to a spindle for locking the spindle is secured by radially engaging locking pin.
- the locking pins are biased by compression springs into their engaged position and disengaged by acting on the locking pin pressure medium.
- the object of the invention is to provide a hydromechanical locking cylinder with a simplified structure. Another object is to provide a hydraulic control system for easy operation, in particular of the locking cylinder according to the invention.
- the locking cylinder according to the invention is characterized in that in a one-piece design or firmly connected two-part design of the spindle with a locking part of the locking engagement by means of at least one frontally arranged on the locking part, radially and axially open Arret michsnut the front side with fixed locking bolt.
- no moving parts are required between the spindle and locking part.
- the frontal engagement allows a sliding, low-wear locking or unlocking by means of only a very slight axial lifting movement of the locking part.
- the detent grooves provided for this purpose on the locking part are preferably provided with at least one chamfering and directly adjoin one another in such a way that locking pins provided in the region of a cylinder bottom engage in each rotational position of the spindle even with very little rotation. This ensures a quick and low-wear inlet and outlet of the locking bolt in the locking grooves.
- the locking grooves are chamfered on both sides, so that the engagement and disengagement of the locking bolt takes place equally easily in both directions of rotation.
- three locking bolts are arranged at 120 ° offset on the cylinder bottom.
- the number of locking grooves on the locking part is preferably a natural multiple of the number of locking bolts, that is, for example, preferably six or better even nine locking grooves in the case of three locking bolts.
- the locking cylinder according to the invention has a separate from a working space for actuating the piston unlocking pressure chamber in the region of the front end of the locking part.
- a suitable in particular for the actuation of the hydromechanical locking cylinder according to the invention hydraulic control system provides that a valve for acting on the working space is only then acted upon by the required working pressure for lifting the piston when the locking member is lifted by the pressure in the unlocking pressure chamber of the locking bolt.
- a valve for acting on the working pressure chamber is in opposite directions coupled with a valve for acting on or relieving the unlocking gelungs pressure chamber.
- all valves used for actuating the piston and the locking part are in a hydraulic control block integrated, which is preferably flanged on the outer casing or housing of the locking cylinder.
- the locking cylinder according to the invention can be designed as a single-acting plunger cylinder but also as a double-acting cylinder. Described is in the embodiments, only a single-acting locking cylinder. For a conversion into a double-acting cylinder, the working pressure chamber in the upper area only needs to be connected to another hydraulic line.
- Fig. 2 is a side view of a locking part chastised on one side
- FIG. 3 is a side view of an alternative locking member with both sides chamfered locking grooves
- Fig. 4 is a perspective view of the locking member according to Figure 3.
- Fig. 5 is a schematic representation of a locking cylinder with an associated hydraulic control system.
- a locking cylinder 10 shown in FIG. 1 is formed by a cylinder tube 12 which is closed at the top by a closing part 11 and at the bottom by a bottom 14.
- the end part 1 1 is screwed by means of a thread 1 1 10 with the cylinder tube 12 and additionally sealed by means of a seal 1 1 12.
- a housing 14 including the bottom 14 wherein the connection also preferably via a unspecified screw thread and an additional seal by means of at least one unspecified seal is done.
- a needle bearing 33 covered upwardly by a support disk 330 is inserted when screwing in.
- a fastening eye 15 is designed for connection, for example, to a machine frame, to a vehicle frame or to a foundation.
- a tubular piston rod 20 is arranged, which is provided at its lower end with a piston 22.
- the upper end of the piston rod 20 is provided with a mounting eye 21.
- the piston 22 has an internal thread 23 that is in engagement with an external thread 31 of a spindle 30 arranged centrally in the cylinder tube 12.
- the thread 23 or 31 is preferably designed as a trapezoidal thread.
- the spindle 30 is fixedly connected to a locking part 32 that connects down to this.
- the locking member 32 has on its downwardly directed end side a plurality of radially outwardly open and also in the axial direction downwardly open locking grooves 34.
- the locking grooves 34 are in Figure 1 with locking pin 18 in engagement, which are fixedly arranged above the bottom 14 substantially horizontally laterally in the housing 19.
- the locking grooves 34 are shown in detail in Figures 2 to 4.
- the locking part 32 is axially movable in an unlocking pressure space 1 6 separate from the working pressure chamber 24 when it is acted upon by means of an unlocking pressure such that the locking grooves 34 can disengage from the locking bolts 18.
- the underside of the needle bearing 33 forms a rotatable stop for the locking part 32.
- the locking part 32 allows a rotation of the spindle 30 to, which causes an axial displacement of the piston 22 and the piston rod 20 upward due to the hydraulic pressure in the working pressure chamber 24 and the engagement of the external thread 31 in the internal thread 23. 2, a locking member 32 is shown in detail.
- FIG. 3 shows an alternative embodiment of a locking part 32 in which the locking grooves 34 are provided with chamfers 36 on both sides. This embodiment is preferred because the engagement of the locking pin 18 or disengaged with the locking pin 18 in both directions is sliding.
- nine locking grooves 34 are arranged uniformly distributed on the circumference. In this case, three offset by 120 ° to each other arranged locking pin 18 for engagement in these locking grooves 34 are provided.
- the piston 22 thus performs at a locking of the locking member 32 only a maximum of 1/9 of a pitch of its thread as expiring axial movement. These are in practice only a few millimeters.
- FIG. 4 schematically indicates a bypass bore 35 which is also present in the embodiment according to FIG.
- This at least one bypass bore provided in the locking part 32 communicates with an inlet opening 35X arranged in the region of the locking grooves 34 with the unlocking pressure chamber 16 arranged below the first seal 161.
- the outlet opening 35S provided laterally on the locking part 32 is in the locking position. locked on by the wall. After lifting off the locking part 32 of the locking pin 18, the outlet opening 35 S communicates with the hydraulic line S, so that the pressure in the unlocking pressure chamber 1 6 pending on the pressure acting as a control pressure line hydraulic line S for controlling the valves 1 10 and 120 is effective.
- Fig. 5 the locking cylinder 10 is shown only schematically in the left part. Below the piston 22, the working pressure chamber 24 can be seen, in which a first hydraulic line A with a line branch A1 10 opens.
- a first hydraulic line A with a line branch A1 10 opens.
- these confluence parts is indicated only schematically by the arrow A.
- a hydraulic line X and between the first seal 1 61 and the second seal 1 62 opens a further hydraulic line S.
- these confluence parts are indicated only schematically by the arrow X and S.
- the hydraulic lines A, X and S are controlled by a hydraulic control block 102 shown schematically in the right-hand part of FIG. 5, which forms a hydraulic control system 100 in conjunction with a multi-way valve 105 and the hydraulic lines A and B controlled by it.
- the hydraulic control block 102 is flanged to the right side of the housing 19 in FIG.
- the first valve 1 10 is connected on the right side via a branch line A1 10 with the first hydraulic line A.
- the first valve 1 10 is connected on the left side via the branch line A1 12 with the working pressure chamber 24.
- the first valve 1 10 is connected to the hydraulic line S and on its upper side, the first valve 1 10 via a control line 1 18 connected to the second valve 120, wherein the control line 1 18 a mutually opposite circuit of the valves 1 10 and 120 causes.
- the second valve 120 is connected on its left side via a branch line B120 with the second hydraulic line B.
- the second valve 120 is connected via a line branch B130 to the third valve 130, which on the input side has a shuttle valve 134 in this area, which inhibits or releases flow to the line branch B130.
- the line branch B120 and the line branch B130 are additionally connected to one another by a bypass line 124 which bypasses the second valve 120 and into which a check valve 122 blocking the flow to the line branch B130 is inserted.
- the third valve 130 is connected at its bottom via a check valve 132 with the first hydraulic line A, wherein the check valve 132 allows only a flow from the first hydraulic line A to the third valve 130. On its left side, the third valve 130 is connected to the unlocking pressure chamber 1 6 leading hydraulic line X.
- the first hydraulic line A is pressurized.
- the third valve 130 controls this pressure in the hydraulic line X, whereby the check valve 132 opens and the shuttle valve 134 blocks the path to the branch line 132.
- the hydraulic line S is in this case still depressurized, so that the first valve 1 10 nor the connection from the line branch A1 10 to the line branch A1 12 stops. Therefore, starting from the hydraulic line A, initially only one unlocking pressure in the unlocking pressure chamber 16 is built up, but still no pressure in the working pressure chamber 24. The unlocking is thus unequivocally uncoupled from the working stroke.
- the unlocking pressure fed in via the hydraulic line X into the unlocking pressure chamber 16 causes the locking part 32 to be lifted off the locking bolt 18.
- the bypass bore 35 and its released outlet opening 35S also act as the control pressure line Hydraulic line S is acted upon by the unlocking pressure.
- the second hydraulic line B is pressurized by the multi-way valve 105 and the first hydraulic line A is simultaneously relieved.
- the pressure is fed via the third valve 130 into the hydraulic line X.
- the hydraulic line S is also subjected to pressure simultaneously via the unlocking pressure chamber 16.
- This pressure causes a reversal of the first valve 1 10 and at the same time via the control line 1 18 and a reversing of the second valve 120.
- only as much pressure is built up, as it is needed to lift the load.
- the mechanical lock immediately acting on the lock engaging with the locking pin 18 locking grooves 34 ensures safe interception of the load in any intermediate position.
- the bypass line 122 with the opening check valve 122 provides for a controlled pressure reduction after completion of a lifting or lowering operation.
- the pressure present in the unlocking pressure chamber 16 is thereby reduced via the hydraulic line X, via the third valve 130 with its now upwardly opening shuttle valve 134 and via the bypass line 122 to the then pressureless hydraulic line B120 and B.
- the inventive hydraulic control system 100 also provides in a simple manner for a very advantageous, minimizing the wear decoupling of the unlocking process from the working stroke of a hydromechanical locking cylinder.
- A1 10 line branch (from A to the first valve 1 10)
- A1 12 Line branch (from the first valve 1 10 to the working pressure chamber)
- A130 line branch (from multiway valve 105 to first valve 1 10)
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016119251.1A DE102016119251A1 (en) | 2016-10-10 | 2016-10-10 | Hydromechanical locking cylinder and hydraulic control system for its operation |
PCT/EP2017/075297 WO2018069128A1 (en) | 2016-10-10 | 2017-10-05 | Hydromechanical blocking cylinder and hydraulic control system for actuating same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3344881A1 true EP3344881A1 (en) | 2018-07-11 |
EP3344881B1 EP3344881B1 (en) | 2019-05-22 |
Family
ID=60190796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17791292.0A Active EP3344881B1 (en) | 2016-10-10 | 2017-10-05 | Hydromechanical blocking cylinder and hydraulic control system for actuating same |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3344881B1 (en) |
DE (1) | DE102016119251A1 (en) |
WO (1) | WO2018069128A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR102020000380A2 (en) | 2019-01-09 | 2020-09-24 | Cnh Industrial America Llc | CYLINDER LOCKING SYSTEM |
CN114508521A (en) * | 2022-03-04 | 2022-05-17 | 烟台星辉航空液压有限公司 | Locking device for holding shafts tightly at any position |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7004075A (en) * | 1970-03-20 | 1971-09-22 | ||
DE20216197U1 (en) * | 2002-10-22 | 2004-03-04 | Bümach Engineering International B.V. | Hydraulic working cylinder |
DE10356597B3 (en) * | 2003-12-04 | 2005-06-02 | Neumeister Hydraulik Gmbh | Locking cylinder unit for hydraulically actuated component has several locking bodies in form of separately movable locking bolts |
DE10356596B3 (en) * | 2003-12-04 | 2005-06-02 | Neumeister Hydraulik Gmbh | Locking cylinder for hydraulic system has load-holding descent brake devices connected to two working chambers |
DE10356598B3 (en) * | 2003-12-04 | 2005-06-02 | Neumeister Hydraulik Gmbh | Locking cylinder for hydraulically actuated component has spindle axially movable relative to cylinder and fixed to support body |
DE102004022203B3 (en) * | 2004-05-05 | 2005-08-11 | Neumeister Hydraulik Gmbh | Locking cylinder for ramps for low bed trucks has units for disengaging a plunger thread and a spindle thread so that axial movement of the plunger about the rotary axis is possible relative to the cylinder without rotating the spindle |
DE102005015059A1 (en) * | 2005-03-31 | 2006-10-05 | Aros Hydraulik Gmbh | Lockable working cylinder |
DE102007024736B3 (en) * | 2007-05-25 | 2008-06-12 | Neumeister Hydraulik Gmbh | Locking cylinder with fluidic slide bearing has supporting body as supporting and bearing body with supporting and bearing surface and counter supporting and bearing surface of second axial bearing in form of fluidic slide bearing |
AT505793B1 (en) * | 2007-09-21 | 2010-03-15 | Weber Hydraulik Gmbh | CYLINDER PISTON UNIT WITH LOCKING ARRANGEMENT |
-
2016
- 2016-10-10 DE DE102016119251.1A patent/DE102016119251A1/en not_active Withdrawn
-
2017
- 2017-10-05 WO PCT/EP2017/075297 patent/WO2018069128A1/en unknown
- 2017-10-05 EP EP17791292.0A patent/EP3344881B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102016119251A1 (en) | 2018-04-12 |
EP3344881B1 (en) | 2019-05-22 |
WO2018069128A1 (en) | 2018-04-19 |
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