EP2454489A1 - Bloc hydraulique d'alimentation et de recalage pour un ensemble de levage à deux supports motorisés indépendants actionnés simultanément - Google Patents
Bloc hydraulique d'alimentation et de recalage pour un ensemble de levage à deux supports motorisés indépendants actionnés simultanémentInfo
- Publication number
- EP2454489A1 EP2454489A1 EP10737952A EP10737952A EP2454489A1 EP 2454489 A1 EP2454489 A1 EP 2454489A1 EP 10737952 A EP10737952 A EP 10737952A EP 10737952 A EP10737952 A EP 10737952A EP 2454489 A1 EP2454489 A1 EP 2454489A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- platform
- duct
- lifting
- solenoid valve
- 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
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
-
- 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
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
- F15B2211/31558—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having a single output member
-
- 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
- F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
- F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure
-
- 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
- F15B2211/78—Control of multiple output members
- F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators
Definitions
- Hydraulic power unit for resetting a lifting assembly with two independent motorized supports operated simultaneously
- the present invention relates to a hydraulic block balancing and registration for a lifting assembly with two independent motor hydraulic elements which are to ensure at all times identical positioning.
- Certain vehicles and in particular car-carrying vehicles, are equipped with platforms or trays intended to carry loads and whose height can be modified to facilitate the loading and unloading operations.
- Each of these gantries comprises two twin poles or lifting arms placed on each side of the vehicle, one on the right and the other on the left.
- Each of the columns or lifting arms is equipped with a hydraulic lifting device, conventionally with a hydraulic screw motor or with a hydraulic jack, making it possible to modify the inclination of the lifting arm or the height of the point of recovery of the plate, and thus to vary the level of the supported board.
- the object of the invention is to provide a device that allows to recalibrate with respect to each other, the two hydraulic lifting devices right and left of each lifting crane in case of poor synchronization of their movement resulting in a lack of horizontality.
- the left and right hydraulic lifting devices are hydraulic screw motors, these are conventionally fed in series. It is then quite easy to perform a registration of the two engines together, at the request of the operator, by stopping feeding one of them by means of a simple derivation.
- the non-powered screw motor then stops, remains stationary in the same position and maintains the load it supports, while the second screw motor continues its movement until ending up in a position identical to the first.
- the power supply of the two screw motors can then be restored so that the movement continues synchronized way.
- Hydraulic lifting cylinders are conventionally supplied in parallel and not in series as the hydraulic screw motors, it is necessary to achieve a sharing of hydraulic fluid to feed each of the cylinders simultaneously.
- the invention responds to this congestion problem by eliminating this very bulky mechanical torsion connection and by providing a particularly compact and bulky system.
- the lift arms remain mechanically independent.
- Another registration system without mechanical torsion connection, has been developed in the prior art leaving the two arms mechanically independent. It is an internal system with hydraulic lifting cylinders. These cylinders comprise a discharge path of the hydraulic fluid opening into the wall of their cylinder by a perforation accessible only when the cylinder is in the upper position. Thus, when one of the cylinders is shifted and arrives early in the high position, the hydraulic fluid feeding it leaves in the discharge path through the perforation become accessible, while the second cylinder continues to rise until it reaches him. also in the high position. This leads to a resynchronization of the two cylinders.
- the resetting device according to the invention can be actuated at any time by the operator and thus advantageously makes it possible to correct a synchronization defect of the movement of the two right and left lifting devices whatever the position of the platform raised. .
- the piston of the cylinders is equipped with a peripheral seal that must pass regularly on the inlet perforation of the discharge path which causes a gradual degradation of the seal. If the seal is not replaced in time, micro-leaks may appear at this level and maintenance of the load is no longer ensured. Such a situation is not acceptable for cylinders to guarantee the safety of maintenance.
- the resetting device according to the invention does not have such drawbacks.
- the device according to the invention performs several functions simultaneously. It controls the descent of the raised load, it divides the flow of the hydraulic fluid and it ensures a resetting of the hydraulic lifting devices as soon as the operator requests it and whatever the position of these hydraulic devices at that moment.
- the invention provides a hydraulic block intended to be mounted on a vehicle, in particular a car transporter vehicle, which comprises at least one platform or a platform for carrying a load and whose height is modifiable, this platform or platform being supported by at least one lifting gantry formed of two mechanically independent lifting arms, respectively right and left, each of these lifting arms being equipped with an independent hydraulic lifting device for varying the height of the platform or platform that it supports.
- this hydraulic block comprises the following hydraulic components:
- a flow divider which has an input channel and two output channels and which regulates the flow of the fluid to obtain two flows of identical flow rate on its two output channels irrespective of the direction of the flow of the fluid
- a two-position and one input-channel reset solenoid valve and two five-output channels which in its first position is passing from its input channel to its first output channel, its second output channel being blocked , and which, in its second position, is passing from its entry way to its second exit lane, its first exit lane being blocked.
- a first branch comprising a first input duct dividing at a distribution point into a first output duct and a second output duct
- a second branch comprising a second input conduit terminating in the input channel of the flow divider and extending at the two output channels of the flow divider firstly into a third output conduit and other part in a conduit leading to the input channel of the resetting solenoid valve and continuing at the first output channel of the resetting solenoid valve by a fourth output conduit and at the second output channel of O the reset solenoid valve in a connecting duct connecting the second output channel of the resetting solenoid valve to the first inlet duct.
- the hydraulic block of the invention is intended to be connected:
- the reset solenoid valve is in its first
- the invention also relates to a vehicle, in particular a car transporter, which comprises at least one platform or platform for carrying a load and the height of which can be modified, this platform or platform being supported by at least one lifting gantry consisting of two mechanically independent lifting arms, respectively right and left, each of these lifting arms being equipped with an independent hydraulic lifting device for varying the height of the platform or platform that it supports, vehicle in which each of the lifting cranes is equipped with a hydraulic block according to the invention connected to O hydraulic lifting devices of the gantry concerned.
- a vehicle in particular a car transporter, which comprises at least one platform or platform for carrying a load and the height of which can be modified, this platform or platform being supported by at least one lifting gantry consisting of two mechanically independent lifting arms, respectively right and left, each of these lifting arms being equipped with an independent hydraulic lifting device for varying the height of the platform or platform that it supports, vehicle in which each of the lifting cranes is equipped with a hydraulic block according to the invention connected to O hydraulic lifting devices of the gantry concerned.
- Figure 1 is a perspective view of the rear of a vehicle carrier equipped with a hydraulic block according to the invention
- Figures 2 and 3 are perspective views respectively of the front and rear of a hydraulic block according to the invention.
- Figure 4 is a simplified hydraulic diagram of a hydraulic block according to the invention connected to two single hydraulic cylinders;
- Figures 5 and 6 are simplified hydraulic diagrams illustrating the operation of the hydraulic block of Figure 4, respectively at the exit and retraction of the rod of the hydraulic cylinders;
- FIGS. 7 and 8 are simplified hydraulic diagrams illustrating the operation of the hydraulic block of FIG. 4 when a registration is requested by the operator, this registration being carried out respectively by the exit or the re-entry of the rod of the left jack; .
- Figure 9 is a hydraulic diagram of a preferred embodiment of the hydraulic block according to the invention, intended to be connected to two hydraulic cylinders secure;
- Figures 10 and 11 are hydraulic diagrams illustrating the operation of the hydraulic block of Figure 9, respectively at the exit and retraction of the rod of the hydraulic cylinders secure;
- FIGS. 12 and 13 are hydraulic diagrams illustrating the operation of the hydraulic block of FIG. 9 when a registration is requested by the operator, this registration being carried out respectively by the exit or the re-entry of the rod of the 0 left-handed jack. .
- FIG. 1 shows, in its environment and in a use situation, a hydraulic block 1 according to the invention mounted at the rear of a vehicle 2, in particular a car transporter according to a preferred but nonlimiting example of a application of the invention.
- the hydraulic block 1 shown is mounted on the frame 3 of the vehicle 2, under the lower plate 4 of the vehicle. It allows to feed and control two O hydraulic lifting devices, respectively left 5 and right 6, which actuate the left and right lifting arms of a hoist gantry not shown.
- the lifting hydraulic devices 5 and 6 can operate indifferently arms, posts, uprights, supports or any other elements of a lifting assembly supporting a platform or a platform5 of variable height.
- arms, posts, uprights, supports or any other elements of a lifting assembly supporting a platform or a platform5 of variable height For simplicity, we will designate all these elements, whatever their exact nature, by the term arm in the remainder of this description and in the claims, without any desire to limit.
- the hydraulic lifting devices 5 and 6 shown in this figure are hydraulic cylinders 7 and 8 and more specifically secure hydraulic cylinders 9 and 10.
- the use of the hydraulic block 1 according to the invention n is not limited to this type of secure hydraulic cylinders 9, 10.
- the hydraulic block 1 of the invention can also be used with conventional hydraulic cylinders 7, 8, or even with hydraulic lifting devices 5, 6 of different nature. like screw motors for example.
- a hydraulic block 1 according to the invention is preferably connected to the hydraulic lifting devices 5 and 6 of each of the lifting cranes of the vehicle.
- the hydraulic block 1 is preferably located between the two lifting arms of the gantry concerned, for example substantially at the longitudinal axis of the vehicle and thus approximately in the middle of the two. lifting arm, or for example, as shown, on one side of the vehicle, preferably the one where is the block of hydraulic controls, manual or electrical, the two hydraulic lifting devices 5, 6 concerned.
- the hydraulic block 1 is connected by two supply links 13 to the hydraulic fluid reservoir, via the hydraulic control unit of the lifting devices concerned. It is also connected by a set of distribution links 14 to the two hydraulic lifting devices 5 and 6.
- the distribution links 14 are three in number by cylinder and end at the level of the securing device 15 or 16 of each jack 9, 10.
- links 13 and 14 may indifferently be made, in whole or in part, in the form of hoses or rigid hydraulic tubes.
- the hydraulic block 1 of the invention is shown alone in FIGS. 2 and 3. It preferably comprises a compact body 17 which encloses the hydraulic circuit and the hydraulic components of the block 1.
- This body 17 is for example in the form of a substantially parallelepiped block, in which have been machined different holes to form housing for the reception of hydraulic components 18
- each inlet and / or outlet duct of the hydraulic circuit of the block 1, or only some of them, can lead to the outside of the hydraulic block 1,
- the hydraulic block 1 shown contains three main hydraulic components 18: a balancing valve 21, a flow divider 22 and a resetting solenoid valve 23.
- the balancing valve 21 is not essential in all applications. When it is present, its function is to brake the descent of the trays, which represent a downhill driving load, and to control their descent movement so that it is progressive and not too fast.
- the balancing valve 21 opens only when the inlet pressure of the fluid is sufficient. It thus establishes at the level of the valve 21 an automatic and progressive balancing between the inlet pressure of the fluid and the weight of the descending load.
- the balancing valve 21 fulfills an additional function when the hydraulic lifting devices 5, 6 are secured cylinders 9, 10 comprising a securing device 15, 16 with valves as shown diagrammatically in FIGS. 10 to 13.
- the balancing valve 21 keeps the return closed as long as the valves of the securing devices
- the flow divider 22 is a static flow divider whose function is to balance the passage of the hydraulic fluid passing through it by creating from a single input flow two flow flows of identical flow rate. This component works regardless of the direction of fluid flow. In the opposite direction, it regulates the flow of the input streams and lets two identical flow input streams pass to recompose a single output stream.
- the flow divider performs its balancing function regardless of the load of the two cylinders and even in the case where the two loads are not identical.
- the reset solenoid valve 23 is a three-way and two-position solenoid valve. It is busy as long as the operator does not control the resetting of hydraulic lifting devices 5, 6 for example by pressing a button provided for this purpose. It is preferably a solenoid valve with valves that offers a better sealing guarantee that a solenoid valve with drawers.
- FIGS. 4 to 8 show a basic variant of the invention.
- the inlets and outlets of the hydraulic block 1 have not been doubled and the hydraulic block 1 has been specially designed to cooperate with hydraulic devices 5, 6 each requiring only two O channels of fluid passage used alternately in both directions depending on the direction of operation of the hydraulic devices 5 and 6.
- These hydraulic devices 5, 6 are for example conventional hydraulic cylinders 7 and 8 having no security system.
- the maintenance of the position of the plates, once the height adjustment has been carried out and in particular during the rolling, is not guaranteed by a hydraulic blocking at the hydraulic lifting devices 5 and 6.
- This maintenance must be provided in another way, for example by the establishment by the operator of lateral pins at the jacks 7 and 8 or at the level of the lifting arms, or by any other means of mechanical locking or other.
- the hydraulic devices 5, 6 shown in FIGS. 4 to 8 are double-acting cylinders 7, 8 which conventionally have a cylindrical body 24, 25 enclosing a large chamber 26, 27 and a small chamber 28, 29 separated by a piston. 30, 31 from which extends the rod 11 or 12 of the corresponding cylinder.
- the hydraulic block 1 is connected to the hydraulic fluid reservoir, via the hydraulic control block, by two supply links 13, one bringing the fluid to the inlet of the system and the other ensuring the return of the fluid to the fluid. tank alternatively according to the direction of operation of the cylinders 7, 8.
- the hydraulic block 1 is supplied with hydraulic fluid through its orifice B, the fluid coming under pressure in the conduit 32.
- the fluid meets a first conduit 33 whose end is closed at the resetting solenoid valve 23 in this configuration of the device.
- the fluid therefore progresses to the balancing valve 21 which is in the closed position. It bypasses it by a bypass duct 34 in which is inserted a valve 35 which it crosses in the direction, which allows it to reach a distribution point 36 at T where it separates in two flows progressing in the ducts 37 and 38 in order to feed each of the large chambers, respectively 26 or 27 of one of the cylinders 7 or 8.
- the hydraulic fluid in the small chamber 28, 29 of the cylinders 7, 8 is expelled from the cylinders by the links 14 and returns to the hydraulic block 1 at the ducts 39 and 40 thereof.
- the fluid progressing in the duct 39 arrives directly on one of the input channels of the flow divider 22.
- the one progressing in the duct 40 first encounters the resetting solenoid valve 23.
- the solenoid valve 23 passes for the fluid passing through it and is found via the duct 41 on the other input channel of the flow divider 22.
- the flow divider 22 operates here in flow recomposition and operates so that the two incoming flows are of identical flow rate on each of its input channels regardless of the load of the two cylinders. It thus ensures synchronization of the operation of the two jacks 7 and 8.
- the flow divider 22 forms a single output stream that escapes through the conduit 42 and out of the hydraulic block 1 through its port A to return to tank by means of one of the supply links 13, via the hydraulic control block.
- the hydraulic fluid progresses in the conduit 42 on which is grafted a conduit 43 for controlling the balancing valve 21.
- the pressure of the fluid is not sufficient to push the balancing valve 21 in the open position.
- the hydraulic fluid arrives at the inlet of the flow divider 22 which separates it into two identical flow flows sent in the ducts 39 and 41.
- the fluid progressing in the duct 39 will directly fill the small chamber 28 of the left ram 7, while that progressing in the duct 41 passes first through the reset solenoid valve 23 in the pass position before going to feed the small chamber 29 of the right cylinder 8 via duct 40.
- the hydraulic fluid of the large chambers 26, 27 of the cylinders 7, 8 is expelled towards the hydraulic block 1 and in the ducts 37 and 38 thereof.
- the flow divider can indifferently be placed in the hydraulic circuit on the side of the large chambers 26, 27 or on the side of the small chambers 28, 29 of the cylinders 7 and 8. Its position could thus be perfectly exchanged with that of the distribution point 36.
- the operation of the flow divider 22 is by nature imperfect, it happens that a shift appears resulting in a failure of synchronization of the cylinders 7 and 8.
- the operator controls the registration of the device by activating the solenoid valve. resetting 23 for example by depressing a control button and holding it down until the registration is complete and the two cylinders again synchronized. This registration operation can be performed regardless of the direction of operation of the cylinders and whatever their position.
- the resetting consists in stopping one of the cylinders while isolating it, while the second continues to operate, the operator controlling according to the situation the output or the retraction of its rod until the offset between the two cylinders has been caught.
- the jack isolated during the resetting operation is the right jack 8.
- the jack isolated during the resetting will preferably be that located on the opposite side of the manual controls so that the operator is on the side of the active jack to better see and control its movement.
- the solenoid valve 23 When the operator controls the resetting, the solenoid valve 23 is energized and is placed in the reset position as shown in FIGS. 7 and 8. In this position, the duct 33 is no longer closed and is put into communication with the conduit 41 through the solenoid valve 23.
- the duct 40 which communicates with the small chamber 29 of the right jack 8, terminates at the level of the solenoid valve 23 by a valve in the closed position.
- the fluid contained in the small chamber 29 can no longer escape, thus rendering O impossible any displacement of the piston 31 and hence any movement of the rod 12 of the jack
- the hydraulic block is fed through its orifice B via line 32.
- a portion of the fluid passes through the conduit 33 and passes through the reset solenoid valve 23 to reach one of the two input channels of the flow divider 22 via the conduit 41.
- the remaining fluid bypasses the balancing valve 21 in the closed position by the bypass duct 34 and reaches the distribution point 36.
- the expelled fluid arrives directly to the other input channel of the flow divider 22, which recomposes a single output stream from the two flows arriving from the ducts 39 and 41.
- This output stream exits through the duct 42, which communicates with the conduit 43.
- This output fluid does not have sufficient pressure to push the balancing valve 21 to the open position. It escapes out of the hydraulic block 1 to return to the tank via the hydraulic control block.
- the system When, in order to proceed with the registration, the operator controls the retraction of the left jack 7 (height adjustment downwards), the system is in the configuration shown in FIG. 8.
- the hydraulic fluid enters the hydraulic block 1 via the duct 42, and pushes the equilibration valve 21 to the open position via the duct 43.
- the fluid progressing in the duct 41 passes through the reset solenoid valve 23 and is returned out of the hydraulic block 1 to the hydraulic control block and the reservoir, via the ducts 33 and 32, while the one progressing in the duct 39 will fill the small chamber 28 of the left cylinder 7 and thus cause the retraction of the rod 11 of the cylinder.
- the hydraulic fluid present in the large chamber 26 of the cylinder 7 is expelled through the conduit 37 of the hydraulic block 1.
- the right cylinder 8 being blocked, the fluid is forced, at the distribution point 36, to go towards the valve of balancing 21 it crosses to join the conduit 32 and return to the tank via the hydraulic control block by means of the supply connection 13.
- the operator stops the registration, for example by releasing the control button.
- the operation of the two cylinders can then continue in a conventional and synchronized manner, according to one of the two normal operating modes detailed above.
- FIGS. 9 to 13 show a second embodiment of the hydraulic block 1 of the invention more particularly designed to be connected to two secured cylinders 9 and 10.
- Such hydraulic devices 5, 6 each require three passage ways. of fluid, two being used alternately in both directions depending on the direction of operation of the cylinders and the third serving the operation of the
- This hydraulic block has the same hydraulic components 18 the basic variant described above, as well as a similar hydraulic circuit. However, we can note the following differences:
- the conduit 33 which in the basic variant starts from a point of intersection 44 with the conduit 32 to lead to the reset solenoid valve 23, continues towards the intersection point 44 by a conduit 45 opening to the outside the hydraulic block 1 through the orifice T12, and the other side through a conduit 46 opening through the orifice T13.
- these additional conduits 45 and 46 are connected by a distribution link 14 to the securing devices 15 and 16 respectively of the secured jacks 9 and 10.
- This arrangement of the additional outlet ducts 45 and 46 corresponds to a constructive and representational facility.
- these additional outlet ducts 45, 46 can be connected, indifferently to one another, to any point of the connecting duct 33 or to any point of the first inlet duct 32 located before the balancing valve 21 when the first inlet duct 32 has one.
- the hydraulic block 1 could contain only one additional outlet duct connected to the connecting duct 33 or to the inlet duct 32, the two connections 14 necessary for the operation of the securing devices of the secured cylinders can, for example, be interconnected outside the hydraulic block 1.
- each of the outputs of the hydraulic block 1 is advantageously doubled by another equivalent output disposed on another face of the block.
- the inlet duct 42 thus divides into two ducts 47 and 48 opening respectively through the orifices A1 and A2.
- the inlet duct 32 is also divided into two ducts 49 and 50 which open respectively through the openings B1 and BZ.
- the outlet ducts 37, 38, 39 and 40 are each divided into two ducts, respectively 51 and 52, 53 and 54, 55 and 56, and 57 and 58, which open respectively through the orifices B11 and B12, B13 and B14, A11 and A12, and A13 and A14.
- the additional outlet ducts 45 and 33 are each divided into two ducts, respectively 59 and 60, and 46 and 61, which open respectively through the orifices T11 and T12, and T13 and T14.
- the operator can thus choose the orifices he wants to use according to his needs and the accessibility of the mounting area of the hydraulic block 1.
- the unused orifices are closed, for example by means of simple plugs.
- This preferred embodiment of the hydraulic block can also be used with simple hydraulic devices 5, 6 each requiring only two fluid passage ways, such as, for example, conventional hydraulic cylinders 7 and 8 that do not have a securing system. It suffices to condemn the additional outlet ducts that are not necessary in such an application, simply closing the orifices T11, T12, T13 and T14.
- this preferred hydraulic block is similar to that of the basic variant and can be deduced easily from the observation of FIGS. 10 to 13.
- the doubling of the outputs detailed above has not been represented in FIG. a simplification concern in order to facilitate the reader's comprehension.
- FIGS. 10 and 11 correspond to the normal operation of the lifting system without a request for registration by the operator, in the direction of the simultaneous exit of the rods 11 and 12 of the jacks 9 and 10 for FIG. 10 and their re-entry simultaneous for Figure 11.
- the fluid flows in the direction of the valves and can therefore cross to reach the large chamber cylinders and thus cause the output of their rods 11 and 12.
- the securing devices 15 and 16 guarantee the holding in position of the cylinders 9, 10.
- the securing devices 15, 16 of the cylinders 9, 10 further include a control means 66, 67 with a slide, the piston of which, respectively 68 and 69, can mechanically open the safety valves 62, 63 and 64, 65 when the pressure is sufficient in the control conduit 70, 71.
- control means 66 and 67 are also connected, via the ducts 72 and 73 and a distribution link 14, to the additional outlet ducts 45 and 46 of the hydraulic block 1.
- the resetting operation is carried out as previously by isolating one of the cylinders 9 or 10 whose operation is stopped while the other cylinder continues its movement.
- the hydraulic block preferably comprises no hydraulic component 18 between the balancing valve 21 and the securing device 15, 16 of the secured cylinders. Indeed, such hydraulic components could interfere with the operation of these securing devices 15, 16.
- the flow divider 22 is preferably placed on the branch of the circuit not connected to the securing devices 15, 16.
- the securing devices are arranged on the side of the large chamber 26, 27 of the cylinders, the flow divider 22 is thus placed on the branch of the circuit connected to the small chambers 28 and 29 of the secured cylinders.
- the situation can be perfectly reversed in another embodiment of the invention.
- hydraulic block according to the invention with hydraulic screw motors instead of hydraulic cylinders, which would make it possible to supply these hydraulic motors in parallel and no longer in series, and thus can be reduced. their power.
- the valve balancing 21 is no longer necessary and can be removed from the hydraulic block 1.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0903522A FR2948078B1 (fr) | 2009-07-17 | 2009-07-17 | Bloc hydraulique d'alimentation et de recalage pour un ensemble de levage a deux supports motorises independants actionnes simultanement |
PCT/FR2010/000507 WO2011007059A1 (fr) | 2009-07-17 | 2010-07-13 | Bloc hydraulique d'alimentation et de recalage pour un ensemble de levage à deux supports motorisés indépendants actionnés simultanément |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2454489A1 true EP2454489A1 (fr) | 2012-05-23 |
EP2454489B1 EP2454489B1 (fr) | 2013-06-05 |
Family
ID=41820273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10737952.1A Not-in-force EP2454489B1 (fr) | 2009-07-17 | 2010-07-13 | Bloc hydraulique d'alimentation et de recalage pour un ensemble de levage a deux supports motorises independants actionnes simultanement |
Country Status (8)
Country | Link |
---|---|
US (1) | US8628282B2 (fr) |
EP (1) | EP2454489B1 (fr) |
CN (1) | CN102483076B (fr) |
ES (1) | ES2424957T3 (fr) |
FR (1) | FR2948078B1 (fr) |
IN (1) | IN2012DN01243A (fr) |
RU (1) | RU2495283C2 (fr) |
WO (1) | WO2011007059A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102797720A (zh) * | 2011-05-26 | 2012-11-28 | 邵阳维克液压股份有限公司 | 一种斗轮机尾车的同步阀组 |
CN103438044A (zh) * | 2013-09-12 | 2013-12-11 | 上海三一重机有限公司 | 一种减少高低速切换频率的结构及机械车辆 |
CN104760528B (zh) * | 2015-04-21 | 2017-06-06 | 湖南鑫联科技发展有限公司 | 全自动液压电控平置内藏式汽车尾板 |
CN109823252B (zh) * | 2019-03-21 | 2021-02-19 | 上海振华重工(集团)股份有限公司 | 一种起重机转运方法 |
CN113027847B (zh) * | 2021-03-23 | 2022-04-26 | 中联重科股份有限公司 | 液压***的流量分配控制方法、设备和装置以及液压*** |
CN113586558B (zh) * | 2021-07-29 | 2023-12-19 | 厦门安科科技有限公司 | 顶升平台同步移动的控制方法及控制装置 |
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FR2413238A1 (fr) * | 1977-12-27 | 1979-07-27 | Lohr Sa | Dispositif de hissage et de transport de charges unitaires sur vehicule |
US4822222A (en) * | 1987-02-24 | 1989-04-18 | Integrated Technologies And Systems, Inc. | Electrohydraulic system for an enclosed automobile carrier |
RU2128789C1 (ru) * | 1996-09-02 | 1999-04-10 | Конструкторское бюро специального машиностроения | Гидравлический привод вывешивания и горизонтирования грузовой платформы |
US6189432B1 (en) * | 1999-03-12 | 2001-02-20 | Hunter Engineering Company | Automotive lift hydraulic fluid control circuit |
CN2518893Y (zh) * | 2002-01-10 | 2002-10-30 | 三一重工股份有限公司 | 沥青混凝土摊铺机熨平板左右提升油缸同步装置 |
RU2240448C1 (ru) * | 2003-07-07 | 2004-11-20 | Открытое акционерное общество "Конструкторское бюро специального машиностроения" | Гидравлический привод вывешивания и горизонтирования грузовой платформы |
ITMI20051256A1 (it) * | 2005-07-04 | 2007-01-05 | Auramo Oy | Gruppo idraulico di controllo dei bracci di una pinza e pinza comprendente tale gruppo idraulico |
CN201186627Y (zh) * | 2007-12-14 | 2009-01-28 | 中国国际海运集装箱(集团)股份有限公司 | 具有中顶举升装置的自卸车 |
CN201240020Y (zh) * | 2008-04-07 | 2009-05-20 | 山东豪迈机械科技股份有限公司 | 平移开放式硫化机 |
CN201225344Y (zh) * | 2008-05-20 | 2009-04-22 | 上海建工(集团)总公司 | 建筑施工爬模顶升同步控制*** |
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2009
- 2009-07-17 FR FR0903522A patent/FR2948078B1/fr not_active Expired - Fee Related
-
2010
- 2010-07-13 RU RU2012100514/06A patent/RU2495283C2/ru not_active IP Right Cessation
- 2010-07-13 US US13/383,940 patent/US8628282B2/en not_active Expired - Fee Related
- 2010-07-13 ES ES10737952T patent/ES2424957T3/es active Active
- 2010-07-13 CN CN201080032479.7A patent/CN102483076B/zh not_active Expired - Fee Related
- 2010-07-13 WO PCT/FR2010/000507 patent/WO2011007059A1/fr active Application Filing
- 2010-07-13 EP EP10737952.1A patent/EP2454489B1/fr not_active Not-in-force
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2012
- 2012-02-10 IN IN1243DEN2012 patent/IN2012DN01243A/en unknown
Non-Patent Citations (1)
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See references of WO2011007059A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2948078A1 (fr) | 2011-01-21 |
ES2424957T3 (es) | 2013-10-10 |
RU2012100514A (ru) | 2013-07-20 |
FR2948078B1 (fr) | 2011-07-15 |
US8628282B2 (en) | 2014-01-14 |
IN2012DN01243A (fr) | 2015-05-15 |
RU2495283C2 (ru) | 2013-10-10 |
CN102483076B (zh) | 2015-01-07 |
WO2011007059A1 (fr) | 2011-01-20 |
US20120141223A1 (en) | 2012-06-07 |
CN102483076A (zh) | 2012-05-30 |
EP2454489B1 (fr) | 2013-06-05 |
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