DE202006016344U1 - Akuatorsystem - Google Patents

Abstract

actuator system for the Operation of active landing gear to compensate for roll, lift, and Nick movements, whereby at least a part of the by the Radhubbewegungen the individual vehicle wheels generated energy recoverable and for the operation of the actuator system is usable.

Description

The The invention relates to an actuator system for the operation of active chassis to compensate for roll, lift and pitch movements.

In DE 101 51 261 A1 an actuator for connecting stabilizer elements of a motor vehicle is proposed, wherein the actuator is formed with at least two fixedly connected to a stabilizer element coupling parts and in one, a pivoting of the stabilizer elements mutually permissive position and in a stabilizer elements to each other holding the stabilizer elements holding position switchable. For this purpose, a first coupling part about a common joint pivotable legs which are respectively engaged with a guide element of the second coupling part, wherein the joint is displaceable by a driving force of a relative movement between legs and guide elements permitting position in a relative movement of this position. The actuator is connected via deflections with the stabilizer legs, which in turn are connected via joints and a pendulum support to the suspension. The installation location of the actuator can be changed flexibly.

In WO 01/53121 A1 a stabilizer assembly for the chassis of a vehicle is described, which has an integrated between two stabilizer halves and, if necessary, mutually rotatable by a twist angle actuator consisting of an adjustment and a downstream gear, wherein the transmission is designed as a curved path.

DE 20 2005 006 545 U1 describes an actuator for active suspension control, which is connected to a handlebar and having an axially and rotatably movable piston, which is in communication with the handlebar and ball bars with an axial and rotational movement can be acted upon.

Of the Compensation of Radhubbewegungen the vehicle or the compensation Rolling, lifting and pitching movements require a relatively high energy requirement.

Of the Invention is based on the object, an actuator for active To create bogies to compensate for roll, lift, and pitch movements, which works energy-efficiently.

These Task is solved with the features of the first protection claim. advantageous Embodiments emerge from the subclaims.

With the actuator system according to the invention for the Operation of active chassis to compensate for roll, lift and pitch movements is at least a part of the wheel strokes of the individual vehicle wheels generated energy recoverable and for the operation of the actuator can be used. This will at least one Part of the generated by the Radhubbewegungen the individual vehicle wheels Energy supplied to an energy storage device and via this the actuator returned to the operation of the active chassis. The by the Radhubbewegung generated energy is supplied to the energy storage via the actuator system.

To the actuator system has at least one coupling joint actuator on, which has a piston with two-sided pressure chambers, with a wheel communicates with the Radhubbewegungen in an axial piston movement are convertible and thereby generated in one of the two pressure chambers overpressure storable in the energy store in the form of a pressure accumulator is and from the memory to compensate for roll, lifting or pitching movements the pressure chambers be fed again is.

Prefers is generated by the Radhubbewegung in one of the pressure chambers Pressure first fed to a buffer in which a buffer pressure can be generated. The cache is again on a Pump in contact with a main storage where a main storage pressure can be generated. The piston movement for generating roll, lift and Nickbewegungen is then by pressurizing the pressure chambers over the Main memory caused. By feeding the intermediate storage pressure in the pump is required for generating the main storage pressure Energy consumption reduced.

Preferably Each wheel is associated with a coupling joint actuator, wherein each Axially two coupling joint actuators a common intermediate memory exhibit.

each Vehicle wheel is over a coupling rod and a spring element with the piston of a coupling joint actuator connected. The spring element is rotatably connected to the piston while and suitable to compensate for the axial piston movements.

Of the Piston of a coupling joint actuator is at least one ball rod in operative connection to the housing is attached to the coupling joint actuator, so that over the Coupling rod introduced rotary motion in an axial piston movement is convertible. The ball bar is ball-jointed to the piston and the housing added.

It is possible, that each coupling joint - actuator a separate housing alternatively, can two mutually associated coupling joint actuators in a common Housing arranged be. Furthermore, it is possible two axle-wise associated coupling joint actuators and to accommodate the buffer in a common housing, wherein the Buffer preferably between two coupling joint actuators is arranged.

Everyone the dirt spaces arranged on both sides of the piston of a coupling joint actuator has a Entrance nozzle and an outlet nozzle on, with the inlet nozzle is in communication with the main memory for supplying pressure medium and the outlet nozzle over a check valve is coupled to an input port of the buffer. Of the Buffer also has an outlet nozzle, which over the Pump is in communication with the main memory. Preferably the buffer formed as a gas pressure accumulator.

are the output valves of the pressure chambers as well Input valve and output valve of the buffer is open, is in a caused by a Radhubbewegung piston movement in Buffer pressure buildable, which is fed into the pump, which in turn generates the required pressure in the main memory.

at closed outlet valves of the pressure chambers are pressurized the pressure chambers over the Main storage, the piston axially displaceable and thus the spring elements on the Coupling rods rotatable, so that the roll, lifting, and pitching movements of the vehicle are compensated.

With the solution according to the invention is on surprising simple way an extremely energy efficient Actuator system created. For the first time is by means of an actuator system the energy generated during the Radhubbewegung for energy recovery and at least partially powering the actuator system used to compensate for roll-lifting and pitching movements of the vehicle.

It was thus an actuator system for active suspensions created that the Radhubbewegungen the individual vehicle wheels uses to gain and save some of the energy for the operation Active undercarriage to compensate for roll, lift, and pitch movements necessary is.

The Invention will now be described with reference to embodiments and accompanying drawings explained in more detail. It demonstrate:

1 : Actuator system, which has two coupling joint actuators K1, K2, between which a buffer S is arranged and which two wheels 1 is assigned to an axis,

2 : Longitudinal section of the actuator system.

In 1 an actuator system A is shown, which has two coupling joint actuators K1, K2, between which a buffer S is arranged and which two wheels 1.1 . 1.2 an axis is assigned in a schematic representation. At every wheel 1.1 . 1.2 is a tie rod 2.1 . 2.2 Tailed with a spring element 3.1 . 3.2 is coupled. Between both spring elements 3 is arranged the actuator system A, whose enlarged longitudinal section in 2 will be shown.

The first coupling joint actuator K1, the buffer S and the second coupling joint actuator K2 are in a common housing 4 arranged. Here, the first coupling joint actuator K1 and the buffer memory S via a first partition W1 and the second coupling joint actuator K2 and the latch S via a second partition W are separated.

The first coupling joint actuator K1 is the first wheel 1.1 and the second coupling joint actuator K2 the second wheel 1.1 assigned.

The first coupling joint actuator has a piston 6 on that with the first spring element 3.1 rotatably and axially slidably connected. At the first piston 6 is a ball bar 8th ball-jointed with one end attached. The other end of the ball bar 8th is on a first housing cover 10 attached to a ball joint.

Mirrored to this arrangement, the second coupling joint actuator has a piston 7 on, with the second spring element 3.2 rotatably and axially slidably connected. At the second piston 7 is also a ball bar 9 ball-jointed with one end attached. The other end of the ball bar 9 is on a second housing cover 11 arranged in a ball joint. The ball poles 8th . 9 have a spatial inclination.

From the first wheel 1.1 to the second wheel 1.2 has the first coupling joint actuator K1 on the first spring element 3.1 facing side of the piston 6 a pressure room 12.1 to which an input E1 and an output A1 are connected. On the other side of the piston 6 becomes a pressure room 12.2 formed, which has an input E2 and an output A2. The first coupling joint actuator K1 is closed by the first partition W1. Adjacent to this is a buffer space 14 of Intermediate S on, which has an input port 17 and an outlet nozzle 18 and from a membrane 16 is limited to a room 15 connects, which is filled with gas.

Of the Latch S is through the second partition W2 from itself subsequent second Coupling joint actuator K2 disconnected.

Between the second partition W2 and the piston 7 of the second coupling joint actuator K2 becomes a pressure chamber 13.1 to which an input E3 and an output A3 are connected. Between the piston 7 and the second housing cover 11 there is a pressure room 13.2 to which an input E4 and an output A4 leads.

Gem. 1 each output A1, A2, A3, A4 via a check valve R1, R2, R3, R4 with the inlet nozzle 17 of the cache. The outlet neck 18 of the buffer S is via a pump 19 with the main memory 20 coupled. From the main memory 20 lead unspecified connection lines to each input E1, E2 of the first coupling joint actuator K1 and the input E3 and E4 of the second coupling joint actuator K2. Each input E1 to E4 is associated with a valve, not shown.

The mode of action is the following:
The vertical movements of the vehicle wheels 1.1 . 1.2 be over the tie rods 2.1 . 2.2 and the spring elements 3.1 . 3.2 initiated as a rotational movement in the actuator A, which is fixed or torsionally connected to the body. The spring element 3.1 is with the piston 6 and the spring element 3.2 with the piston 7 rotationally connected. The spatially inclined ball poles 8th and 9 generate due to their positive connections with the piston 6 . 7 and the housing covers 10 . 11 from the rotational movements of the spring elements 3.1 . 3.2 a stroke movement of the pistons 6 and 7 , which is used to pump the hydraulic fluid, the pressure chambers 12.1 . 12.2 . 13.1 and 13.2 crowded. Hydraulic fluid is sucked in via the inlet ports E1, E2, E3, E4, and the hydraulic fluid is supplied via the outlet ports A1, A2, A3, A4 via the check valves R1, R2, R3, R4 and the connecting piece 17 in the buffer space 14 of the buffer S pressed. The space 15 is filled with gas. This will be over the membrane 16 compacted. About the outlet nozzle 18 will do that with the pressure of the buffer space 14 applied medium into the pump 19 pressed, which additionally increases this pressure by the pump pressure and thus the main memory 20 filled.

Will the sockets A as well 17 and 18 closed by means of suitable valves not shown and the main memory 20 connected to the nozzle E1, E3 or E2, E4 by means of suitable valves, not shown, and thus the corresponding pressure chambers 12.1 . 12.2 . 13.1 . 13.2 pressurized, the pistons become 6 . 7 axially displaced in the direction of the pressure chamber in which the lower pressure prevails and the spring elements 3.1 . 3.2 over the coupling rods 8th . 9 twisted so that they are twisted and thus compensate for the rolling, lifting, and pitching movements of the vehicle.

there is the actuator to generate energy at the same time as actuator for the active suspension system with use.

Dominates, for example, in all pressure chambers 12.1 . 12.2 . 13.1 . 13.2 the same pressure and then the pressure in the two pressure chambers 12.1 and 13.2 increased, perform the pistons 6 and 7 a movement towards the buffer S and twist through the ball rods 8th . 9 in the same direction, causing both spring elements 3.1 . 3.2 also be twisted in the same direction.

In the opposite equal pressurization perform both spring elements 3.1 . 3.2 a rotational movement in the opposite direction. As a result, for example pitching movements of the vehicle can be compensated. Be in the front wheels and / or the rear wheels associated actuator system, the spring elements 3.1 . 3.2 the same direction pivoted by an equal amount, strokes can be compensated. Different pressurizations of the individual pistons 6 . 7 and thus a rotation of the spring elements 3.1 . 3.2 to different amounts and / or in different directions to compensate for rolling movements.

Claims (22)

Actuator system for the operation of active landing gear to compensate for roll, lift, and pitch movements, at least a part of the generated by the Radhubbewegungen the individual vehicle wheels Energy recoverable and for the operation of the actuator system is usable. Actuator system according to claim 1, characterized in that that at least a part of the by the Radhubbewegungen the individual Vehicle wheels generated Energy an energy storage and on this the actuator system for the operation of the active chassis can be fed. Actuator system according to claim 1 or 2, characterized that the actuator system the energy generated by the Radhubbewegung the energy storage supplies. Actuator system according to one of claims 1 to 3, characterized in that it has at least one coupling joint actuator having a piston with two-sided pressure chambers, which communicates with a wheel, wherein the Radhubbewegungen are convertible into an axial piston movement and thereby generate in one of the two pressure chambers overpressure can be stored in an energy storage in the form of a pressure accumulator and from the memory to compensate for roll, lifting or pitching movements the pressure chambers can be fed again. Actuator system according to one of claims 1 to 4, characterized in that by the Radhubbewegung in one of the pressure chambers generated pressure is supplied to a buffer in which a buffer pressure can be generated. Actuator system according to claim 5, characterized in that that the cache is over a pump is in communication with a main memory in which a Main storage pressure can be generated. Actuator system according to claim 5 or 6, characterized that by the injection of the intermediate pressure in the pump the energy required to produce the main storage pressure is reducible. Actuator system according to one of claims 1 to 7, characterized in that each wheel is a coupling joint actuator assigned. Actuator system according to one of claims 1 to 8, characterized in that each coupling joint actuator a Caching is assigned. Actuator system according to one of claims 1 to 8, characterized in that each axle two coupling joint actuators a common cache is assigned. Actuator system according to one of claims 1 to 10, characterized in that the vehicle wheel via a Coupling rod and a spring element with the piston of a coupling joint actuator connected is. Actuator system according to claim 11, characterized in that that the spring element with the piston of a coupling joint actuator rotatably connected. Actuator system according to one of claims 1 to 12, characterized in that the piston of a coupling joint actuator is in operative connection with at least one ball bar, the a housing is attached, so the over the coupling rod introduced rotary motion in an axial piston movement is convertible. Actuator system according to claim 13, characterized in that that the ball rod on the piston and the housing received ball joint is. Actuator system according to one of claims 1 to 14, characterized in that each two axles each other associated coupling joint actuators arranged in a common housing are. Actuator system according to one of claims 1 to 15, characterized in that each two axles each other associated coupling joint actuators and the latch in a common housing are arranged. Actuator system according to Claim 16, characterized that the buffer between two coupling joint actuators is arranged. Actuator system according to one of claims 1 to 17, characterized in that each of the two sides of the piston arranged pressure chambers a coupling joint actuator, an inlet nozzle and an outlet nozzle having the input port with the main memory for feeding of pressure medium communicates and the outlet port via a check valve communicates with an input port of the buffer. Actuator system according to one of claims 5 to 18, characterized in that the buffer store an outlet which has over the Pump is in communication with the main memory. Actuator system according to one of claims 5 to 19, characterized in that the buffer as a gas pressure accumulator is trained. Actuator system according to one of claims 1 to 20, characterized in that when the output valves are closed the pressure chambers as well as a closed inlet valve and outlet valve of the Buffer by pressurizing the pressure chambers over the Main storage, the piston axially displaceable and thus the spring elements on the Coupling rods are rotatable, so that the roll, lifting, and pitching movements of the vehicle are compensated. Actuator system according to one of claims 1 to 21, characterized in that when the output valves of the pressure chambers and an open input valve of the buffer store at a caused by a Radhubbewegung piston movement in the buffer pressure on is buildable.