EP2145105A2 - Axialkolbenmaschine - Google Patents
AxialkolbenmaschineInfo
- Publication number
- EP2145105A2 EP2145105A2 EP08749455A EP08749455A EP2145105A2 EP 2145105 A2 EP2145105 A2 EP 2145105A2 EP 08749455 A EP08749455 A EP 08749455A EP 08749455 A EP08749455 A EP 08749455A EP 2145105 A2 EP2145105 A2 EP 2145105A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pivoting cradle
- axial piston
- adjusting
- piston machine
- adjusting device
- 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
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 230000002706 hydrostatic effect Effects 0.000 description 11
- 239000000314 lubricant Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
Definitions
- the invention relates to an axial piston machine with a pivoting cradle whose inclination is variable with respect to an axis of rotation of a cylindrical drum, and with an actuating system acting on the pivoting cradle.
- Piston machine known in which the stroke of arranged in a cylinder drum piston is changeable by means of a swash plate.
- the housing for receiving the drive shaft, the cylinder drum and the adjusting devices of an actuating system acting on the inclination of the swashplate is substantially pot-shaped. Through openings are provided in the region of the bottom of the pot which are formed as pressure chambers and are tightly sealed on the outside of the housing by means of sealing caps.
- Adjusting devices each comprise an actuating piston, which are held on the side facing away from the pressure chamber in abutment against the swash plate and thus they can tend relative to the axis of rotation.
- the known hydrostatic machines have the disadvantage that the limitation of the inclination adjustment of the pivoting cradle or the swashplate takes place directly via the actuating piston of the adjusting device.
- Limiting devices act directly on the swashplate and are disposed adjacent to the actuators and offset radially outward.
- the two adjusting devices and the two limiting devices are thus on a common plane passing through the axis of rotation.
- the arrangement of the adjustable limiting devices laterally next to the adjusting devices of the adjusting system has the disadvantage that the space of the variable displacement pump, as it is known from the RDE 92500-19-L / ll .03, increases.
- the axial piston machine has a pivoting cradle whose inclination is variable with respect to a rotation axis of a cylinder drum.
- On the swivel cradle acts a positioning system.
- the adjusting system has a first adjusting device for adjusting the inclination of the pivoting cradle in a first direction of movement and a second adjusting device for adjusting the inclination of the pivoting cradle in an opposite second direction of movement.
- the first and the second Adjusting device are arranged with respect to the axis of rotation on opposite sides of the axial piston machine and act on the pivoting cradle.
- the adjusting system of the axial piston machine further comprises a device for limiting the movement of the pivoting cradle.
- the device for limiting the movement of the pivoting cradle comprises a first adjustable limiting device and a second adjustable limiting device, each acting on the pivoting cradle and arranged with respect to the axis of rotation as the first and the second adjusting device on opposite sides of the pivoting cradle.
- the first and the second adjusting device and the first and the second limiting device are each in different
- the two limiting devices thus lie approximately on a first diagonal and the two adjusting devices on the other diagonal.
- the limiting device it is not necessary to have to arrange the limiting device, starting from the axis of rotation radially outside the adjusting device.
- the axial piston machine according to the invention builds slimmer.
- the pivot axis of the pivoting cradle and the axis of rotation are preferably perpendicular to one another, wherein the first adjusting device and / or the second adjusting device lie in each case in a plane arranged parallel to the axis of rotation. It is particularly advantageous if the first adjusting device and the movement of the pivoting cradle in the first direction of movement limiting adjustable first limiting device are arranged in a common plane. The surface normal of this common plane is arranged parallel to the pivot axis.
- the adjustable second limiting device limiting the movement in the second direction of movement of the pivoting cradle is arranged in a further plane whose surface normal also runs parallel to the pivoting axis of the pivoting cradle and in which the second adjusting device is also arranged.
- This arrangement has the advantage that both the force introduction of the actuating force by the first adjusting device and in the opposite direction of the limiting force by the first limiting device in a plane.
- Adjusting device preferably each have a control piston for generating the actuating force. These can be acted upon in a simple manner in a pressure chamber with a control pressure. A simple control system without the use of additional, for example, electric actuators is therefore feasible.
- the actuating force generated by a control pressure is thus directly on the pivoting cradle or an attachment of the pivoting cradle, such as a hold-down, transferable. It is particularly advantageous if in each case a blind bore is provided in the housing of the axial piston on one side opposite the pivoting cradle, in which the end remote from the pivoting cradle end of the actuating piston is arranged. Between the housing or the blind bore arranged therein and the adjusting piston, a pressure chamber is formed. The pressure in this pressure chamber thus directly determines the actuating force, which is ultimately used to adjust the inclination of the pivoting cradle.
- the directed to the pivoting cradle end of the actuating piston performs no purely linear movement. It results from the pivoting movement of the pivoting cradle movement of the actuating piston in a plane.
- the provided in the blind bore side of the actuating piston is therefore preferably designed as a spherical adjusting piston disc.
- Such a spherical adjusting piston disc has the advantage that the slight tilting movements which the adjusting piston carries out in the blind bore can be carried out in the blind bore without loss of the sealing action of the adjusting piston disc.
- the actuating forces, which cause a pivoting movement of the pivoting cradle, preferably engage in one
- Hold-down segment which is connected to the pivoting cradle.
- the actuator piston therefore transmits its actuating force via the hold-down segment to the pivoting cradle.
- a ball-and-socket joint is preferably provided which is partially relieved of hydrostatic lubrication.
- hydrostatically pronouncedtlastete Kugelköpf connection is a ensures high reproducibility of the actuating movement.
- the frictional forces between the actuating piston and the swivel cradle or the hold-down segment are reduced by the hydrostatic discharge.
- Such a design ensures a particularly low-backlash connection and thus increases the positioning accuracy.
- each of the hold-down segments When using hold-down segments, it is particularly preferred to provide a stop surface on each of the hold-down segments, which interacts with the corresponding first or second limiting device for limiting the movement of the pivoting cradle in the direction of movement predetermined by the associated positioning device.
- the limiting the movement in this direction limiting element acts with a for this purpose on the
- Hold-down segment provided stop surface together.
- the force and the further adjustment in this direction of movement limiting counterforce on the same hold-down segment are effective when the stop surface rests against the adjustable limiting element.
- an optimized force flow is thus ensured by the holding-down segment or the pivoting cradle. This is especially true when the plane in which the adjusting device and the corresponding associated limiting device extends through a bearing region of the spherical pivot angle bearing of the pivoting cradle.
- a further stop surface is formed, which cooperates with a housing-side counterpart to a safety stop.
- adjustable pivot angle stop is formed by the adjustable first and second limiting device and the respective stop surface of the hold-down segments.
- the safety stop attacks for the protection of the axial piston machine, for example, in case of accidental adjustment of the adjustable limiting devices.
- the counterpart or the counterparts, which cooperate with the further stop surfaces, are preferably provided on a flange part of the housing or in a jacket region of a cup-shaped housing part.
- the first adjusting device preferably has a first adjusting piston, in which a lubricant channel is formed.
- the second adjusting device has a second adjusting piston, in which a lubricant channel is formed.
- This lubricant channel connects the associated blind bore, in which one end of the actuating piston is arranged in a pressure chamber with the end of the actuating piston facing the pivoting cradle. In this way, the pressure medium for the hydrostatic discharge of the ball joint is removed by the pressure in the pressure chamber, which acts on the first and the second actuating piston with a hydraulic force.
- the pivoting cradle on a pivoting pivot bearing which in a corresponding bearing surface on the Housing side is rotatably arranged.
- the pivoting pivot bearing comprises two bearing surfaces. The common center line of these bearing surfaces defines the pivot axis of the pivoting cradle.
- pressure medium passages are preferably formed, via which pressure medium, supplied from the blind bore of at least one of the adjusting devices, leads to the hydrostatic relief of the bearing surface of the pivoting cradle.
- at least one corresponding channel is also formed in the hold-down segment.
- the pressure medium is preferably taken from the adjusting device for pivoting, so the adjustment of the axial piston machine in the direction of increasing stroke volume.
- the connection to both bearing surfaces of the pivoting cradle is then arranged in the pivoting cradle itself.
- Pressure medium channel branches there and thus connects the two bearing surfaces with the Ausschwenk-adjusting device.
- the pivoting cradle is preferably starting from a neutral position, in which the surface normal one
- Running surface of the pivoting cradle parallel to the axis of rotation extends in two opposite directions pivotally.
- the maximum pivoting in the two opposite directions is preferably the same size and can each be limited by the formation of a safety stop.
- the adjustable first and second limiting devices are provided.
- the first and / or the second adjusting device preferably have an elastic element, which acts on the pivoting cradle with a force acting in the first direction of movement and / or with a force acting in the second direction of movement.
- the axial piston machine can be set to maximum displacement for a flow direction.
- Axial piston machine adjusted to its maximum displacement.
- the elastic element is preferably designed as a spiral spring steel spring which surrounds the adjusting piston of the first or the second adjusting device, wherein the coil spring is supported on a spring plate on the housing side.
- the spring plate is according to a further preferred embodiment, either on a bottom of a cup-shaped housing part or in an alternative embodiment of an abutment ring, which is arranged spaced from the bottom of the cup-shaped housing part in the housing of the axial piston machine.
- FIG. 2 shows an illustration of the essential components of a positioning system of an axial piston machine according to the invention
- Fig. 3 is a second illustration of the control system of Fig. 2;
- Fig. 4 is an illustration of the essential components of a
- Fig. 5 is a partially sectioned view of a
- the axial piston machine 1 shows a sectional illustration of an axial piston machine 1 according to the invention, wherein the sectional plane, however, extends eccentrically parallel to a rotation axis of the axial piston machine 1.
- the axial piston machine 1 has a cylinder drum 2, in which a plurality of cylinder bores are distributed in a manner not shown distributed over a circumferential circle.
- pistons are arranged longitudinally displaceable, which promote a pressure medium by their stroke movement when it is a pump in the illustrated axial piston machine 1.
- the axial piston machine 1 has a housing, which consists of a first cup-shaped housing part 3 and a second housing part, which is designed as a flange 4.
- An unillustrated in Fig. 1 drive shaft is rotatable in the flange 4 and the stored, first cup-shaped housing part 3 and rotatably connected to the cylinder drum 2.
- the cylinder drum 2 Upon rotation of the drive shaft, the cylinder drum 2 is rotated by the non-rotatable connection.
- Pistons are supported in a known manner via sliding blocks on a pivoting cradle 5.
- the pivoting cradle 5 has a running surface 6 for this purpose.
- a retraction plate 7 is provided in order to prevent lifting of the sliding shoes from the running surface 6 of the pivoting cradle 5 during a suction stroke.
- the retraction plate 7 is held at a fixed distance from the running surface 6 of the pivoting cradle 5 and thus prevents lifting of the sliding shoes from the running surface 6.
- the sliding blocks are pivotally connected to the piston.
- the pistons in the cylinder drum 2 thus perform a different large stroke per revolution of the drive shaft or the cylinder drum 2.
- the pivoting cradle 5 On its side facing the flange part 4, the pivoting cradle 5 has a pivotal pivot bearing 8.
- at least one first bearing region is formed on the pivoting cradle 5, which forms a sliding bearing with a corresponding recess 9 of the flange part 4.
- the design of the pivot angle bearing of the pivoting cradle 5 will be explained below with reference to FIGS. 2 and 5.
- the pivoting cradle 5 is rotatable about a pivot axis S by rotating the pivoting cradle 5 in the pivoting pivot bearing. This changes the inclination of the running surface 6 relative to the axis of rotation of the cylinder drum 2.
- a control system is provided within the housing of the axial piston machine 1.
- the adjusting system comprises at least a first adjusting device 10.
- the first adjusting device 10 has a first actuating piston 11.
- the first control piston 11 defines with its first end 12 a pressure chamber 13.
- the pressure chamber 13 is formed in a bottom of the cup-shaped housing part 3.
- a blind bore 14 is introduced into the bottom of the cup-shaped housing part 3, in which a bushing 15 is inserted.
- the bushing 15 is preferably pressed into the blind bore 14.
- the inner wall of the bush 15 serves the first end 12 of the actuating piston 11 as a sliding surface and cooperates sealingly with the first end 12 of the first actuating piston 11.
- the first end 12 of the actuating piston 11 is not cylindrical, but has a slightly convex shape to prevent tilting in the socket 15 at an oblique position of the actuating piston 11 relative to the longitudinal axis of the bushing 15. In the crowned region of the first end 12 of the actuating piston 11, a sealing ring could also be arranged.
- a ball head is formed.
- the ball head is connected to a hold-down segment 17 so that both tensile and compressive forces can be transmitted.
- the hold-down segment 17 is firmly connected by means of screws with the pivoting cradle 5.
- the hold-down segment 17 is screwed onto the running surface 6 in an outer region of the pivoting cradle 5.
- the hold-down segment 17 also has a hold-down surface 19, which engages over the return plate 7 and rests against the retraction plate 7 and thus ensures a constant distance of the retraction plate 7 of the tread 6 of the pivoting cradle 5.
- a spherical recess 20 is provided in the hold-down segment 17, which encloses the ball-head-shaped second end 16 of the actuating piston 11.
- the connection of the actuating piston 11 with the hold-down segment 17 is designed as a locked connection. That is, the ball-head-shaped second end 16 is enclosed further than the equator by the spherical recess of the hold-down segment.
- a lubricant channel 21 is formed inside the adjusting piston 11 in the first adjusting device 10.
- the lubricant channel 21 extends from the first end 12 of the actuating piston 11 to the second end 16.
- the lubricant channel 21 connects the pressure chamber 13 with the ball-head-shaped second end 16 of the actuating piston 11.
- a pressure prevailing in the pressure chamber 13 thus ensures a discharge of Pressure medium at the ball-head-shaped second end 16 of the actuating piston 11.
- the articulated connection between the actuating piston 11 and the hold-down segment 17 is lubricated and hydrostatically relieved.
- the first adjusting device 10 is provided for pivoting the axial piston machine 1 in the direction of maximum displacement volume.
- the pressure chamber 13 is connected to the delivery side of the axial piston machine 1 designed as a pump.
- the pending in the pressure chamber 13 high pressure is also used to cause a hydrostatic discharge of the pivoting cradle 5 in the flange 4.
- This is both in the Hold-down segment 17 and in the pivoting cradle 5 a pressure medium channel 22 and 23, respectively.
- the pressure medium channel 23 of the pivoting cradle 5 is connected outside the section shown in FIG. 1 to the bearing area 8. That from the
- Pressure chamber 13 originating, pressurized pressure medium thus exits between the recess 9 and the bearing portion 8 of the pivoting cradle 5, and thus ensures a hydrostatic discharge of the pivoting cradle 5. This leads to a significant reduction of the required actuating forces.
- a dowel pin 24 is provided, which is inserted into a bore in the pivoting cradle 5 and a corresponding bore in the hold-down segment 17.
- an adjustable first limiting device 25 is provided in the pot-shaped housing part 3 in the region of an end remote from the ball joint connection between the actuating piston 11 and the hold-down segment 17 of the hold-down segment 17.
- the first limiting device 25 cooperates with a first stop surface 26, which is formed on the hold-down segment 17.
- the first stop surface 26 is crowned, so that regardless of the setting of the first limiting device 25, the force is introduced by the limiting device 25 perpendicular to the first stop surface 26 and thus through the center of the crown.
- the center of this crowning is viewed from the stop surface in the direction of the pivoting cradle. 5
- the first limiting device 25 comprises an adjusting screw 27, which is screwed into a thread provided for this purpose in a housing bore. Depending on the depth of engagement, the maximum deflection of the pivoting cradle 5 in a first direction of movement by the first
- the housing bore is arranged in the region of the jacket of the cup-shaped housing part 3. It includes with the axis of rotation at an angle such that the central axis of the
- Adjustment screw 27 passes through the center of the crown of the stop surface 26.
- the first adjusting device 10 The first adjusting device 10, the first limiting device 25 and the first
- Hold-down segment 17 are all associated with a first direction of movement of the pivoting cradle 5. While the first adjusting device 10 attempts to adjust the pivoting cradle 5 in a first direction of movement, the first limiting device 25 serves as an adjustable stop and thus limits the maximum adjustment in this first direction of movement. To secure the adjusting screw 27 in a selected position, a lock nut 28 is provided. The lock nut 28 also serves to seal the housing interior from the environment. A safety cap 29 prevents unauthorized changing of the setting values.
- Axial piston machine 1 is also provided at the same end of the hold-down segment 17, on which the ball connection between the second end 16 of the actuating piston 11 and the first hold-down segment 17 is formed, a further stop surface 30 is formed.
- the Another stop surface 30 is formed on the flange part 4 side facing and cooperates with a counterpart 51 of the flange 4 to a safety stop.
- Safety stop between the flange 4 and the further stop surface 30 of the first hold-down segment 17 is formed.
- the first adjusting device 10 and the first adjusting device 10 are identical to each other.
- an elastic element is provided on the first adjusting device 10.
- the elastic element is in the illustrated embodiment as a spring 33rd executed.
- the spring 33 which is preferably a steel spiral spring, is supported on the one hand on a first spring bearing 31 formed in the vicinity of the second end 16.
- the spring bearing 31 is formed as a radial shoulder in the actuating piston 11 and has a slightly extending in the axial direction in the direction of the first end 12 of the actuating piston 11 guide portion for centering the spring 33.
- the spring 33 abuts against a second spring bearing 32.
- the spring bearing 32 also has a guide portion which extends in the axial direction.
- the spring bearing 32 is arranged in a centering recess 34 of the housing part 3 and rests there against the bottom of the cup-shaped housing part 3.
- the spring bearing 32 is preferably at the same time at the bottom of the cup-shaped housing 3 at the bottom of the centering recess 34 and at the oriented to the interior of the housing of the axial piston 1 end of the bushing 15 at.
- FIG. 1 shows a section through the first adjusting device 10 and the first adjustable limiting device 25.
- the first adjusting device 10 is provided for adjusting the axial piston machine 1 in the direction of larger stroke volume and can therefore be referred to as Ausschwenkvoriques. This is true when the axial piston machine 1 as a hydraulic pump z. B. is used in the open circuit and is provided for promotion in one direction only.
- a second adjusting device 35 is further provided, which in the illustration of FIG. 1, however, is not recognizable due to the position of the cut.
- the second adjusting device 35 has also a second variable restricting device 39 and substantially corresponds to the first adjusting device 10.
- the second adjusting device 35 and the second limiting device 39 are also in turn arranged in a common plane, said further plane parallel to the plane of the first adjusting device 10 and the first
- Clamping device 25 is located.
- the two planes are preferably symmetrical to the axis of rotation of the cylinder drum 2.
- FIG. 2 This arrangement is shown in Fig. 2, in which the individual components of the control system are shown again in a perspective view. In this case, the components of the axial piston machine 1 that do not concern the positioning system are omitted for easier traceability.
- the second adjusting device 35 of the actuating system has an actuating piston, which is mounted with its first end in a second sleeve 36.
- the second sleeve 36 is also inserted in a blind bore in the bottom of the cup-shaped housing part 3.
- a second pressure chamber is formed in the sleeve 36, which is closed by the bottom of the cup-shaped housing part 3, as in the first adjusting device 10.
- the pressure chamber or the pressure chamber is limited by a likewise spherical control piston disc.
- the respectively crowned adjusting piston disk of both the adjusting piston 11 and the adjusting piston of the second adjusting device 35 is guided in the bush 15 or the further bushing 36.
- To the another end of the actuating piston of the second actuator 35 is also a
- the second end 37 of the actuating piston of the second adjusting device 35 is also inserted into a spherical recess of a second hold-down segment 38.
- the second hold-down segment 38 like the first hold-down segment 17, is connected to the pivoting cradle 5 by means of screws 18.
- the first and second hold-down segments 17 and 38 are preferably identical.
- the first hold-down segment 17 extends substantially along the plane in which the first adjusting device 10 and the first limiting device 25 are arranged. Accordingly, the second hold-down segment 38 extends in
- the second variable restricting device 39 is similar in construction to the first variable restricting device 35, so the description will be omitted.
- the adjusting devices 10 and 35 are on a first diagonal in the region of the inner corners of the housing and the adjustable limiting devices 25 and 39 on a second diagonal in Area of the inner corners of the housing arranged.
- the first actuator 10 is in the first quadrant, the first limiting device 25 in the fourth quadrant, the second actuator 35 in the third quadrant and the second adjustable one Limiting device 39 arranged in the second quadrant.
- a stop surface 40 is also formed, which is designed crowned.
- the spherical shape of the stop surface 40 has, as in the first hold-down segment 17 with the result that regardless of the selected setting of the variable limiting device 39, the force is always perpendicular to the stop surface 40.
- a further stop surface 41 is also formed on the second hold-down segment 38.
- the further stop surface 41 is formed at the same end of the second hold-down segment 38 as the ball joint connection with the actuating piston of the second actuator 35.
- the pivoting pivot bearing 8 of the pivoting cradle 5 is formed by a first bearing surface 8.1 and a second bearing surface 8.2.
- the first bearing surface 8.1 extends in a width in the direction of the pivot axis S, so that the plane in which the first adjusting device 10 and the first adjustable limiting device 25 are arranged, ie in which the directions of force by the first adjusting device 10 and the first adjustable Limiting device 25 are, passes through the first bearing surface 8.1.
- the second bearing surface 8.2 also extends over a width in the direction of the pivot axis S, so that the further plane in which the second adjusting device 35 and the second limiting device 39 are arranged, extends through the region of the second bearing surface 8.2.
- FIG. 3 once again shows a perspective illustration of the positioning system of the axial piston machine 1 according to the invention.
- the first adjusting device 10 and the second adjusting device 35 are shown in a section.
- a counterpart to the further stop surface 40 is also shown.
- This counterpart to the second stop surface 40 which cooperates with the second stop surface 40 to form a safety stop, can also be formed on the cup-shaped housing part 3, in particular in the case of a return pivoting device.
- the sectional view of the second adjusting device 35 it can be seen that in the adjusting piston of the second adjusting device 35 extending in the longitudinal direction
- Lubricant channel 42 is provided. This lubricant channel 42 connects those in the second socket
- the first pressure chamber 13 has a smaller diameter than the second pressure chamber. This makes it possible in the first pressure chamber 13 always to leave the delivery-side high pressure of the axial piston machine 1 in the case of a pump. A pivoting in the direction of decreasing delivery volumes takes place upon reaching appropriate setting pressures in the second pressure chamber of the actuating piston of the second actuator 35.
- the adjusting system is shown in its first end position in which the stop surface 26 of the first
- Hold-down segment 17 is in abutment with the first limiting device 25. Furthermore, it can be seen that the pivoting cradle 5 is penetrated centrally by a bore 45. This bore 45 forms a passage for the drive shaft of the axial piston machine. 1
- Fig. 4 is a slightly modified
- a return of the position of the pivoting cradle 5 and thus of the actuating piston II 1 of the first adjusting device 10 is made possible here.
- a return element 50 is arranged on the actuating piston II 1 .
- This return element 50 is fixedly connected to the actuating piston II 1 , so that the position of the return element 50 provides information about the respectively set delivery of the axial piston machine 1.
- a return element 50 is advantageous for a swivel angle or power control of the axial piston machine 1 according to the invention.
- a system of the spring plate 32 at the bottom of the cup-shaped housing part 3 is not possible. It is therefore an abutment ring 46 is provided which rests against a formed in the interior of the cup-shaped housing part 3 rib.
- the abutment ring 46 in turn has a centering recess in which the spring plate 32 is arranged.
- the spring plate 32 has a central bore through which the actuating piston 11 or II 1 extends.
- the spring plate 32 is slotted in a c-shape and is laterally on the compressed when spring is compressed
- the spring plate 32 is supported on the actuating piston.
- Fig. 5 shows a partial section through components of the control system of the invention Axial piston machine 1.
- the course of the pressure channels in the first hold-down segment 17 and further in the pivoting cradle 5 is shown. It can be seen in particular that the pressure channel in the pivoting cradle 5 opens out in the region of the second bearing surface 8.2 and thus enables a hydrostatic relief of the pivoting cradle 5.
- the invention is not limited to the illustrated embodiments. In particular, it is possible to combine individual features of the illustrated embodiments in an advantageous manner.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007022567A DE102007022567A1 (de) | 2007-05-14 | 2007-05-14 | Axialkolbenmaschine |
PCT/EP2008/003868 WO2008138604A2 (de) | 2007-05-14 | 2008-05-14 | Axialkolbenmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2145105A2 true EP2145105A2 (de) | 2010-01-20 |
EP2145105B1 EP2145105B1 (de) | 2012-11-21 |
Family
ID=39868687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08749455A Active EP2145105B1 (de) | 2007-05-14 | 2008-05-14 | Axialkolbenmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US8261654B2 (de) |
EP (1) | EP2145105B1 (de) |
JP (1) | JP5144750B2 (de) |
DE (1) | DE102007022567A1 (de) |
WO (1) | WO2008138604A2 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006062065A1 (de) * | 2006-12-29 | 2008-07-03 | Robert Bosch Gmbh | Axialkolbenmaschine mit einem einen radial erweiterten Innenraumabschnitt aufweisenden Gehäuse |
US8647075B2 (en) | 2009-03-18 | 2014-02-11 | Eaton Corporation | Control valve for a variable displacement pump |
JP2013530345A (ja) * | 2010-07-08 | 2013-07-25 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | ハイドロリック式のダブルアキシャルピストン機械 |
US9920751B2 (en) * | 2010-07-08 | 2018-03-20 | Robert Bosch Gmbh | Hydraulic axial piston machine |
DE102011116962A1 (de) | 2010-10-30 | 2012-05-03 | Robert Bosch Gmbh | Axialkolbenmaschine |
DE102011113533A1 (de) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Hydrostatische Axialkolbenmaschine |
GB2502824A (en) * | 2012-06-08 | 2013-12-11 | Water Hydraulics Company Ltd | Axial piston variable stroke hydraulic machine |
CA2913062C (en) * | 2013-05-22 | 2020-06-02 | Hydac Drive Center Gmbh | Axial piston pump having a swash-plate type construction |
EP4240967B1 (de) * | 2021-01-22 | 2023-12-20 | Danfoss Power Solutions GmbH & Co. OHG | Axialkolbenmaschine mit durch eine servoeinheit betätigtem schwenkelement zur verstellung des verdrängungsvolumens |
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US1573525A (en) * | 1925-09-29 | 1926-02-16 | Tavannes Watch Co Sa | Multicylinder pump |
US1749682A (en) * | 1926-09-03 | 1930-03-04 | Weldy Arthur Sheldon | Pump |
US2455062A (en) | 1943-07-12 | 1948-11-30 | Lucas Ltd Joseph | Variable stroke pump |
US3274948A (en) * | 1964-07-02 | 1966-09-27 | Sundstrand Corp | Pump or motor wobbler mounting |
US3373696A (en) * | 1965-05-12 | 1968-03-19 | Gen Electric | Fluid transmission devices |
GB1200180A (en) * | 1966-12-14 | 1970-07-29 | Dowty Technical Dev Ltd | Swash plate pump |
FR1590650A (de) * | 1968-07-08 | 1970-04-20 | ||
US3830594A (en) * | 1971-06-28 | 1974-08-20 | Caterpillar Tractor Co | Variable displacement pump having pressure compensator control method |
GB1548095A (en) * | 1976-05-10 | 1979-07-04 | Bryce J M | Apparatus and method for attaching a wire to a supporting post |
US4168653A (en) * | 1976-12-20 | 1979-09-25 | Caterpillar Tractor Co. | Two position variable displacement motor |
JPH0526151A (ja) * | 1991-07-16 | 1993-02-02 | Toyota Autom Loom Works Ltd | 油圧駆動装置 |
US6705203B2 (en) | 2001-11-28 | 2004-03-16 | Sauer-Danfoss Inc. | Extended male slipper servo pad arrangement for positioning swashplate and method assembling same |
DE102006062065A1 (de) | 2006-12-29 | 2008-07-03 | Robert Bosch Gmbh | Axialkolbenmaschine mit einem einen radial erweiterten Innenraumabschnitt aufweisenden Gehäuse |
-
2007
- 2007-05-14 DE DE102007022567A patent/DE102007022567A1/de not_active Withdrawn
-
2008
- 2008-05-14 EP EP08749455A patent/EP2145105B1/de active Active
- 2008-05-14 US US12/599,383 patent/US8261654B2/en active Active
- 2008-05-14 WO PCT/EP2008/003868 patent/WO2008138604A2/de active Application Filing
- 2008-05-14 JP JP2010506866A patent/JP5144750B2/ja active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008138604A3 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008138604A3 (de) | 2009-09-17 |
JP2010526246A (ja) | 2010-07-29 |
JP5144750B2 (ja) | 2013-02-13 |
DE102007022567A1 (de) | 2008-11-20 |
EP2145105B1 (de) | 2012-11-21 |
US8261654B2 (en) | 2012-09-11 |
WO2008138604A2 (de) | 2008-11-20 |
US20100307330A1 (en) | 2010-12-09 |
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