EP4074966A1 - Tank and assembly with a tank - Google Patents
Tank and assembly with a tank Download PDFInfo
- Publication number
- EP4074966A1 EP4074966A1 EP22167628.1A EP22167628A EP4074966A1 EP 4074966 A1 EP4074966 A1 EP 4074966A1 EP 22167628 A EP22167628 A EP 22167628A EP 4074966 A1 EP4074966 A1 EP 4074966A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- space
- leg
- oil
- opening
- 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.)
- Pending
Links
- 238000009434 installation Methods 0.000 abstract description 2
- 210000002414 leg Anatomy 0.000 description 79
- 239000007788 liquid Substances 0.000 description 16
- 230000005484 gravity Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000001175 rotational moulding Methods 0.000 description 5
- 210000000689 upper leg Anatomy 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000007872 degassing Methods 0.000 description 4
- 210000003414 extremity Anatomy 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000007373 indentation Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000011982 device technology Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 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
- 238000009826 distribution Methods 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- 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
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
- F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
Definitions
- the invention relates to a tank for a cooling liquid or for a pressure medium, in particular for an oil, according to the preamble of claim 1.
- the invention also relates to an arrangement with a tank and with a hydraulic block.
- a tank for a hydraulic unit This serves to store a hydraulic fluid.
- the tank has an upper inlet connection and an outlet connection arranged below.
- Guide walls are formed between the connections, which guide a flow of hydraulic fluid from the inlet connection to the outlet connection.
- the flow guide is designed in such a way that it has at least two 180° flow arcs for cooling and calming the hydraulic fluid and for avoiding dead zones.
- the invention is based on the object of creating a tank and arrangement with a tank which has a comparatively small tank volume, improved degassing and improved climate management.
- a tank for a liquid or hydraulic liquid or oil has a tank space for storing the liquid.
- the tank space has a return opening or inlet opening and a suction opening or outlet opening for the liquid.
- the tank space is U-shaped or approximately U-shaped or V-shaped with a first space leg and a second space leg.
- the space legs are connected via a transverse space leg of the tank space.
- the tank space has two space legs that extend parallel to one another or at an angle to one another, the end sides of which are connected via a transverse space leg.
- the return opening is preferably connected to the first space leg and the suction opening to the second space leg.
- liquid can flow into the tank space via the return opening and flow via the first space leg to the second space leg.
- the liquid can exit the tank space again via the intake opening.
- the legs are advantageously arranged horizontally.
- a tank volume can be reduced by the horizontal arrangement of the legs, with improved degassing and improved climate management at the same time.
- the U-shaped flow guidance enables improved oil utilization. Standing areas or dead volumes in the tank space are minimized, which is why channeling with warm oil from the return to the suction line is prevented or at least reduced, since the oil has to flow through all areas in the tank space. Due to the two-leg design with the two space legs, at least the second space leg can serve as a fluid zone and calm the oil in a simple manner, since it is separated from the turbulent return area. It has been shown that due to the horizontal formation of the U-shaped legs, degassing of the oil is improved compared to the prior art due to the active deflection of the oil flow.
- climate management in the tank is improved, since it has been shown that the oil is almost completely circulated during operation as a result of the configuration described. This results in a good distribution of the oil in the tank and the temperature of the oil can be recorded more accurately, since temperature differences in the oil are comparatively small.
- the legs extend approximately parallel to the surface of the earth.
- the legs can extend transversely to the direction of gravity.
- the arrangement of the tank in space depends on the position of the vehicle.
- the legs can extend approximately parallel to a plane of the chassis.
- the tank is made of plastic in a simple manner in terms of device technology. Rotational molding has proven to be an extremely cost effective method of manufacturing the tank.
- the U-shaped configuration of the tank is advantageously suitable for this. If necessary, it is conceivable to manufacture the tank using a plastic injection molding process.
- the tank can be in the form of a sheet metal tank. Walls can then, for example, be connected in a material-to-material manner, for example by welding, or, at least in part, be configured by bending.
- the first spatial leg is preferably delimited by a leg base.
- a diffuser projection can be formed and/or integrated on the base of the leg, which extends into the space leg.
- the liquid flow in the tank space can advantageously be split up by the diffuser projection, so that in particular no so-called sloshing occurs.
- the diffuser projection is preferably formed opposite the return opening, which is in particular arranged at the top.
- the diffuser projection can be provided in an axial geometric extension of the return opening or the return line.
- the return opening is preferably arranged above the tank space.
- the return opening can, for example, be designed in such a way that liquid flows into the tank space, for example in the direction of gravity.
- the diffuser projection preferably tapers inwardly away from the thigh bottom.
- the diffuser projection can, for example, be designed conically or in the shape of a truncated cone or pyramid-shaped or rotationally symmetrical. Viewed from the outside, it is conceivable that the diffuser projection has a concave design. It can be an integral part of the thigh base and easily manufactured together with the tank, for example by rotational molding will.
- a wall thickness of the diffuser projection corresponds, for example, to a wall thickness of the bottom of the leg. In other words, a cone geometry is integrated into the tank wall or into the tank bottom, which ideally splits the oil flow in the tank.
- a longitudinal axis of the diffuser projection is preferably coaxial or approximately coaxial with a longitudinal axis of the return opening.
- Approximately may mean that tolerances are allowed to allow for the general function of the diffuser boss.
- a flow direction of the liquid emerging from the return opening points towards the diffuser projection.
- the direction of flow and a longitudinal axis of the diffuser projection are arranged, for example, at least approximately parallel to one another.
- the return opening can be arranged above the diffuser projection.
- the legs are preferably delimited by a side wall of the tank.
- the tank can be designed as a U-shaped trough. It would also be conceivable to design the tank as a trough, which is divided in two by an inner wall, with the inner wall having a through opening to connect the space legs separated from one another by the inner wall, in order to achieve an approximately U-shaped configuration.
- a free tank space is preferably formed between the first and second space leg.
- This can be delimited by a first and a second side wall section.
- These side conversion sections in turn can each delimit the first and second space legs.
- the transverse side wall section delimiting the transverse space leg can then be provided between the two side wall sections.
- the side wall sections and the transverse side wall section may extend upwardly from a tank bottom or from thigh bottoms or the thigh bottoms.
- the side wall sections and the transverse side wall section are U-shaped and thus form a U-shaped inner wall for the legs.
- the tank space which is delimited by the side wall sections and the transverse side wall section, can be viewed from above, in particular in the direction of gravity, from an inner cover section of the tanks must be closed.
- the free space in the tank is open downwards, in particular as seen in the direction of gravity, and/or in the direction away from the leg of the transverse space.
- the tank clearance can be closed towards the inside and open towards the outside, making it easy to produce.
- a height of the tank clearance is preferably less than the tank height of the tank. This makes it possible for the inner cover section to be flushable if necessary. If required, liquid can thus flow from one space leg via the inner cover section to the other space leg.
- the tank has a tank cap covering the leg spaces.
- This is preferably formed in one piece with the tank and is produced, for example, by means of rotational moulding. If a free space is provided with an inner cover section, this can be spaced apart from the tank cover. It is also conceivable that the inner cover section is part of the tank cover.
- the legs are preferably delimited by an outer side wall which is in particular connected in one piece to the tank cover and is more preferably connected in one piece to a tank base or the bases or bases of the legs.
- the outer side wall preferably encompasses the inner side wall sections with the transverse side wall section in such a way that the U-shaped legs are formed.
- the legs are delimited from below by a bottom wall.
- This can, for example, simply be U-shaped.
- the outer side wall is then preferably formed in one piece between the tank cover and the bottom wall.
- the thigh bottoms can be part of the bottom wall.
- the leg of the transverse space is delimited by two outer wall sections of the outer side wall.
- a The outer wall section is then preferably arranged adjacent to the first space leg and the further outer wall section is arranged adjacent to the second space leg.
- At least one of the outer wall sections extends, preferably viewed in cross section, in particular viewed transversely to the top-bottom direction, obliquely with respect to a longitudinal axis of the adjacent space leg. This outer wall section extends in such a way that it guides the liquid from the adjacent space leg towards the other space leg. If a free space is provided, at least the one obliquely arranged outer wall section extends towards the free space.
- the obliquely formed outer wall section points towards the dividing wall.
- Both outer wall sections are preferably arranged at an angle.
- the two outer wall sections are arranged, for example, in a V-shape or approximately in a V-shape with respect to one another.
- the outer wall sections are provided on the front side of the tank, with the tank then being able to taper in the area of the lateral leg of the transverse space when viewed from the outside. Waves and turbulence in the liquid can be avoided by the obliquely arranged outer wall sections. In other words, sloping sidewalls serve to avoid waves and turbulence.
- the outer wall sections are preferably arranged in such a way that they each deflect the flow by 90° or by approximately 90°. As a result, a dynamic pressure is reduced or largely avoided, which leads to a reduction in wave motion and turbulence.
- the tank has beveled corners for deflecting the flow from one space leg to the other space leg. It would also be conceivable for the outer wall sections to extend along an arc or a curve.
- a U-shaped indentation which extends along the legs, is advantageously made in the bottom wall of the tank.
- the indentation can be concave as seen from the outside and convex as seen from the inside. It would be conceivable that the depressions have one or more interruptions.
- the indentation supports the flow guidance and, on the other hand, it can advantageously lead to a stiffening of the tank, in particular of the bottom wall.
- the U-shaped recess preferably extends approximately parallel to the legs.
- a width of the depression can be smaller than a bottom width of the legs.
- the recess is preferably spaced from the walls.
- the outer side wall can have at least one inner transverse rib or at least one inner transverse rib for one or both space legs. This can extend approximately or exactly in the direction from top to bottom.
- the transverse rib leads to an advantageous stiffening of the tank.
- the mechanical stability of the tank can be improved by traverse webs.
- the tank cap of the tank has a flange.
- This can be designed in such a way that it can be connected to a hydraulic block directly or via another component.
- the flange has an annular flange surface.
- the flange surface can, for example, extend in one plane, in particular in a plane transverse to the direction of gravity or the top-bottom direction.
- the flange surface preferably comprises a cover opening of the tank cover. Lines for the return flow and the intake can be easily inserted into the tank via the cover opening.
- Both space legs are preferably accessible via the cover opening. It is conceivable that the two space legs are open at the top via the cover opening, with the cover opening being able to be covered by a hydraulic block, for example.
- the cover opening can then be designed in such a way that lines of the hydraulic block cantilever over the cover opening into the space leg, in particular exactly or approximately in the direction of gravity or the top-bottom direction.
- the tank preferably has a support frame, via which the tank can be fixed.
- the support frame can be U-shaped, for example.
- the support frame can be designed in such a way that it is supported on a floor surface or a structural component.
- An upper side of the tank is preferably firmly connected to the support frame. It is at least conceivable that part of the tank weight or the entire tank weight is carried by the support frame over the top.
- the support frame can overlap the tank and be supported on the floor surface. If the support frame is U-shaped, for example, it is conceivable for the tank to be arranged between the frame legs.
- the support frame can be attached via the flange surface of the tank, in particular via a sealing ring which is arranged on the flange surface and is attached to the tank via means. Screw connections, for example, serve as means.
- the support frame may also have a flange portion which is fixed on the flange surface of the tank and encloses the lid opening.
- the flange section preferably forms the connection between the frame legs.
- the support frame has support legs, via which the support frame can be supported on the floor surface and which are connected to the flange section.
- the tank can, for example, be designed in such a way that it is supported directly on the floor surface and also via the support frame.
- the hydraulic block is attached to the support frame.
- the support frame preferably has attachment sections or an attachment section for the hydraulic block within the flange section.
- the tank is therefore not connected directly to the hydraulic block, but via the support frame.
- the weight of the hydraulic block is thus preferably supported by the support frame and not by the tank. This can thus be configured more easily.
- the tank has a cooler outlet connection and a cooler inlet connection.
- the cooler outlet connection is preferably connected to one space leg and the cooler inlet connection is preferably connected to the other space leg.
- the cooler outlet connection is preferably connected to the first space limb and the cooler inlet connection is connected to the second space limb. Liquid can thus be routed via the cooler from the return connection to the suction connection, which relieves the flow in the tank.
- the cooler connections are preferably provided on the face side of the space leg, in particular on the side away from the transverse space leg. The connections are preferably introduced in the outer side wall.
- Active liquid or oil cooling can be connected to the cooler outlet connection and to the cooler inlet connection. This can circulate the oil between two chambers, for example. As a result, cooling of the tank can be improved and a short circuit from the return connection to the suction connection can be prevented. Active cooling can reduce temperature-related oil aging.
- the tank has one or more connections, in particular for: the cooler outlet connection and/or the cooler inlet connection and/or a connection for a level indicator and/or a connection for a ventilation filter and/or a filling connection and/or an oil drain and /or a connection for a level sensor and/or at least one connection as a reserve for a function and/or a connection for an optical oil level indicator.
- the connections are preferably integrated into the tank.
- the tank has fastening devices integrated into the bottom wall in order to fasten the tank to the floor.
- fastening elements are integrated into the tank, such as inserted nuts, for fastening the tank to a substrate or for fastening additional components.
- the tank has one or more integrated functional element(s), such as fastening elements for fastening the tank and/or for fastening one or more components.
- another large-volume return line can open out into the tank, in particular via the tank opening.
- the lines that is to say the return lines and the intake lines, preferably extend freely into the tank space, starting from the hydraulic block.
- the tank opening and/or return opening and/or tank opening encloses at least part or all of the lines, but does not seal them, ie. H. no sealants are required between the lines and the opening.
- the lines are connected via the hydraulic block.
- the return opening and/or the suction opening and/or the tank opening is therefore preferably not a connection, which is why the tank can be configured in a simplified manner.
- an arrangement with the tank according to one or more of the preceding aspects and with a hydraulic block is provided.
- the tank is particularly suitable for the combination with the hydraulic block.
- the tank according to the invention has a comparatively small oil volume, in particular due to improved flow guidance.
- the improved flow control is achieved in particular by separating the return line and suction line and suction and/or through the slanted side walls.
- degassing is also improved and temperature-related oil aging can be reduced, in particular by connecting a cooler. Improved temperature management is also made possible.
- the tank with the multitude of functions can be manufactured, for example, by means of plastic rotational molding.
- the return opening and the suction opening are preferably part of the hydraulic block, and these can be formed on lines. The lines can then protrude into the tank room.
- the lines can preferably be firmly connected to the hydraulic block, in particular screwed.
- the tank therefore does not require any fastening options for the lines, as a result of which it can be further designed in a simple manner in terms of device technology.
- tank-side connections are screwed into the hydraulic block and protrude into the inside of the hydraulic tank.
- a tank with side walls, a floor and a ceiling is disclosed.
- the tank can be designed as a U-shaped trough, whereby the flow path from a suction and a suction line is maximized in a small installation space.
- a tank 1 made of plastic for storing oil is shown in a side view.
- This has a tank cap 2 or a tank top and a tank bottom 4 or a bottom wall.
- the tank 1 is shown from above.
- the tank 1 further has an outer side wall 6.
- a flange 8 with a frame-shaped flange surface 10 can be seen from the top. This delimits a cover opening 12 or tank opening. Oil can be introduced into and removed from the tank via the cover opening 12 .
- a plurality of blind hole recesses 14 are introduced into the flange surface 10, into which screws for fastening a component can be inserted.
- Functional elements in the form of nuts are integrated within the blind hole recesses 14 . These are integrated as inserts during the manufacturing process.
- the side wall 6 has two outer wall sections 16 and 18 arranged in a V-shape relative to one another on the end face of the tank 1 . These are used to deflect an oil flow, which is explained in more detail below.
- a through hole 20 for a ventilation filter is formed in the tank cap 2 a through hole 20 for a ventilation filter.
- a through-opening 22 is provided, which serves as a filling connection.
- a filling level sensor can be introduced into a tank interior of the tank 1 in a further passage opening 24 .
- a through opening 26 can be used for a further function or can be closed with a cap, for example.
- the bottom wall 4 of the tank 1 is shown. This has a U-shaped depression 28 . A free space 30 can also be seen. This is designed to be open at the bottom towards the bottom wall 4 and is delimited by walls which, as explained in more detail below, delimit oil routing inside the tank. Furthermore, according to Fig. 1b from the bottom wall 4 a diffuser projection 32 inwards. This is designed concave seen from the outside. According to Fig. 1a it can be seen that the diffuser projection 32 is conical and has a wall thickness which corresponds approximately to the wall thickness of the bottom wall 4 . Furthermore, four supporting elements 34 are integrated into the bottom wall 4, via which the tank 1 can rest on a bottom or on a support surface. The support elements 34 are formed in the corner area of the tank 1 and extend downwards away from the bottom wall 4 in the manner of a projection.
- the tank 1 is shown in a rear view.
- the free space 30 can be seen. This is open to the rear.
- the space 30 is defined by first and second inner sidewall sections 36 and 38 . It is delimited at the top by an inner cover section 40 .
- the free space 30 according to Figure 1D an inner transverse side wall section 42 provided between side wall sections 36 and 38 .
- the upper inner cover section 40 is arranged below the tank cover 2 .
- Fig. 1b a front view of the tank 1 is shown.
- the outer wall sections 16 and 18 arranged at an angle to one another can be seen. These approach each other from a respective tank side of the tank 1 .
- An optical oil level indicator 44 is formed on the front side. This extends starting from the bottom wall 4 upwards and opens into the tank cap 2.
- a through-opening 46 formed at the end as an oil drain.
- a first and second oil port 48, 50 is provided.
- a cooler can be connected to this. Oil is taken from the oil connection 50 and fed back via the oil connection 48 .
- a large-volume return line 52 and an intake line 54 are shown schematically. These are fed into the tank interior via the cover opening 12 .
- the inner tank space of the tank 1 has a first space leg 56 and a second space leg 58, the sections 36, 38, 40 and 42, s. Fig. 1b and e , are separated from each other.
- the return line 52 dips into the first space limb 56 and the intake line 54 dips into the second space limb 58 .
- Oil is fed into the first space leg 56 via the return line 52 and oil is removed via the second space leg 58 via the intake line 54 .
- the lines 52 and 54 are in the 2 hydraulic block not shown connected.
- a return line 60 is shown which has a smaller diameter than the return line 52 .
- the return line 60 also opens into the first space leg 56 and is connected to the hydraulic block.
- a filter 62 for oil attached to the tank 1 is also provided. This is in the through hole 20 from 1c deployed.
- a level sensor 64 is also shown, which extends into the through-opening 24 1c is used.
- the oil level indicator 44 attached to the front of the tank. This is connected to the inside of the tank to show the oil level.
- FIG. 3 shows the tank 1 with the space legs 56 and 58 in cross section. These are connected to one another via a transverse space leg 66 .
- the legs 56, 58 and 66 are arranged in a U-shape, with the legs 56, 58 and 66 being arranged lying down.
- Oil enters the first chamber leg 56 via a return opening 68 , shown schematically as a ring, in the return line 52 and the return line 60 .
- the oil then flows along the first leg 56 and is deflected by 90° in each case by the inclined outer wall sections 16 and 18, which are also designed to be inclined on the inside.
- the outer wall sections 16 and 18 delimit the transverse space leg 66.
- the oil then reaches the second space leg 58 via this and can be drawn in via a suction opening 70, which is schematically represented as a ring in 3 is shown to be sucked.
- the intake opening 70 is part of the intake line 54 2 .
- the return opening 68 of the return line 52 is arranged above the diffuser projection 32 . This is arranged approximately coaxially to the conical diffuser projection 32 and spaced somewhat from it. Oil exiting return port 68 is evenly split by diffuser boss 32 .
- a tank 72 according to a second exemplary embodiment is shown. This is in contrast to the 1 formed from sheet metal.
- the top of the tank 72 according to Figure 5c 12 shows a flange surface 74 formed circumferentially around tank 72.
- FIG. A hydraulic block for example, can be fastened via the flange surface 74, or a cover with a further flange is arranged, or a support frame is fastened to it.
- the tank 72 also has a conical diffuser projection 76 .
- the inner tank space is continuously divided by a sheet metal wall 78 .
- the tank space also has a first and second space leg 82 and 84, which have a transverse space leg 86, s.
- Figure 5a are connected in a U-shape.
- Figure 5b and 5c oblique frontal outer wall sections 88 and 90 are shown.
- FIG. 6 shows the tank 1 according to the first embodiment together with a hydraulic block 92 and a support frame 94.
- the support frame 94 is provided with a frame-shaped flange section 95 on the flange surface 10 of the flange 8 of the tank 1, see FIG. 1c , fastened.
- the flange section 96 is expanded radially inward, the hydraulic block 92 being fastened on the expansion.
- the hydraulic block 92 is attached to an upper side of the support frame 94 and the tank 1 is attached to an underside of the support frame 94 .
- the hydraulic block 92 is supported by the support frame 94 and four support legs 96, two of which are in 6 can be seen on the ground.
- the tank 1 is therefore not burdened by the weight of the hydraulic block 92 .
- the support structure 94 overlaps the tank 1 laterally with its support legs 96 .
- the arrangement 6 it is, for example, a hydraulic unit. This is used, for example, for a hydraulic press brake. It is conceivable that the press has two or more of the arrangements.
- the tank 1 preferably has integrated functional elements. These can be attachment options that are integrated into the tank design. For example, inserted nuts can be provided to fasten the tank to the ground or additional components. Further functional elements do not have to be additionally attached, for example, but can already be integrated into the tank design and produced by rotational molding.
- trusses such as the recess 28 from Fig. 1b and lateral indentations 100 and 102, cf. 3 , which can extend in an up and down direction and can be molded into the tank 1 from the outside, serve to increase the mechanical stability of the tank 1.
Abstract
Offenbart ist ein Tank mit Seitenwänden, einem Boden und einer Decke. Der Tank kann als U-förmige Wanne ausgeführt sein, wodurch der Strömungsweg von einer Saug- und einer Nachsaugleitung beim kleinen Bauraum maximiert ist.A tank having side walls, a floor and a ceiling is disclosed. The tank can be designed as a U-shaped trough, which maximizes the flow path from a suction and an after-suction line in a small installation space.
Description
Die Erfindung betrifft einen Tank für eine Kühlflüssigkeit oder für ein Druckmittel, insbesondere für ein Öl, gemäß dem Oberbegriff des Anspruchs 1. Außerdem betrifft die Erfindung eine Anordnung mit einem Tank und mit einem Hydraulikblock.The invention relates to a tank for a cooling liquid or for a pressure medium, in particular for an oil, according to the preamble of
Aus der
Demgegenüber liegt der Erfindung die Aufgabe zugrunde, einen Tank und Anordnung mit einem Tank zu schaffen, bei dem/der ein vergleichsweises geringes Tankvolumen, eine verbesserte Entgasung und ein verbessertes Klimamanagement vorliegt.In contrast, the invention is based on the object of creating a tank and arrangement with a tank which has a comparatively small tank volume, improved degassing and improved climate management.
Die Aufgabe hinsichtlich des Tanks wird gelöst gemäß den Merkmalen des Anspruchs 1 und hinsichtlich der Anordnung gemäß dem Merkmal des Anspruchs 10.The object regarding the tank is solved according to the features of
Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous developments of the invention are the subject matter of the dependent claims.
Erfindungsgemäß ist ein Tank für eine Flüssigkeit oder Hydraulikflüssigkeit oder Öl vorgesehen. Der Tank hat einen Tankraum zum Speichern der Flüssigkeit. Der Tankraum weist eine Rücklauföffnung oder Zulauföffnung und eine Ansaugöffnung oder Ablauföffnung für die Flüssigkeit auf. Vorteilhafterweise ist der Tankraum U-förmig oder etwa U-förmig oder V-förmig mit einem ersten Raumschenkel und einem zweiten Raumschenkel ausgebildet. Die Raumschenkel sind über einen Querraumschenkel des Tankraums verbunden. Mit anderen Worten hat der Tankraum zwei sich parallel zueinander oder angewinkelt zueinander erstreckende Raumschenkel, deren Endseiten über einen Querraumschenkel verbunden sind. Die Rücklauföffnung ist vorzugsweise mit dem ersten Raumschenkel und die Ansaugöffnung mit dem zweiten Raumschenkel verbunden. Somit kann Flüssigkeit über die Rücklauföffnung in den Tankraum einströmen und über den ersten Raumschenkel zum zweiten Raumschenkel fließen. Über diesen kann die Flüssigkeit über die Ansaugöffnung wieder aus dem Tankraum austreten. Vorteilhafterweise sind die Schenkel liegend angeordnet.According to the invention, a tank for a liquid or hydraulic liquid or oil is provided. The tank has a tank space for storing the liquid. The tank space has a return opening or inlet opening and a suction opening or outlet opening for the liquid. Advantageously, the tank space is U-shaped or approximately U-shaped or V-shaped with a first space leg and a second space leg. The space legs are connected via a transverse space leg of the tank space. In other words, the tank space has two space legs that extend parallel to one another or at an angle to one another, the end sides of which are connected via a transverse space leg. The return opening is preferably connected to the first space leg and the suction opening to the second space leg. Thus liquid can flow into the tank space via the return opening and flow via the first space leg to the second space leg. The liquid can exit the tank space again via the intake opening. The legs are advantageously arranged horizontally.
Es hat sich gezeigt, dass durch die liegende Anordnung der Schenkel ein Tankvolumen reduzierbar ist, bei gleichzeitig verbesserter Entgasung und verbessertem Klimamanagement. Durch die U-förmige Strömungsführung ist eine verbesserte Ölausnutzung ermöglicht. Stehende Bereiche oder Totvolumen im Tankraum sind minimiert, weswegen eine Kanalbildung bei warmem Öl vom Rücklauf zur Saugleitung verhindert oder zumindest vermindert ist, da das Öl alle Bereiche im Tankraum durchströmen muss. Durch die zweischenklige Ausgestaltung mit den zwei Raumschenkeln kann zumindest der zweite Raumschenkel als Fluidzone dienen und das Öl auf einfache Weise beruhigen, da dieser vom turbulenten Rücklaufbereich getrennt ist. Es hat sich gezeigt, dass durch die liegende Ausformung der U-förmigen Schenkel eine Entgasung des Öls aufgrund der aktiven Umlenkung der Ölströmung im Vergleich zum Stand der Technik verbessert ist. Außerdem ist ein Klimamanagement im Tank verbessert, da sich gezeigt hat, dass durch die beschriebene Ausgestaltung das Öl im Betrieb nahezu komplett umgewälzt wird. Somit erfolgt eine gute Verteilung des Öls im Tank und die Temperatur des Öls kann genauer erfasst werden, da Temperaturunterschiede im Öl vergleichsweise gering sind.It has been shown that a tank volume can be reduced by the horizontal arrangement of the legs, with improved degassing and improved climate management at the same time. The U-shaped flow guidance enables improved oil utilization. Standing areas or dead volumes in the tank space are minimized, which is why channeling with warm oil from the return to the suction line is prevented or at least reduced, since the oil has to flow through all areas in the tank space. Due to the two-leg design with the two space legs, at least the second space leg can serve as a fluid zone and calm the oil in a simple manner, since it is separated from the turbulent return area. It has been shown that due to the horizontal formation of the U-shaped legs, degassing of the oil is improved compared to the prior art due to the active deflection of the oil flow. In addition, climate management in the tank is improved, since it has been shown that the oil is almost completely circulated during operation as a result of the configuration described. This results in a good distribution of the oil in the tank and the temperature of the oil can be recorded more accurately, since temperature differences in the oil are comparatively small.
Mit anderen Worten erstrecken sich die Schenkel etwa parallel zur Erdoberfläche. Somit ist vorzugsweise kein Gefälle vom Zu- zum Ablauf. Das heißt, die Schenkel können sich quer zur Schwerkraftrichtung erstrecken. Selbstverständlich sind Abweichungen möglich, beispielsweise wenn der Tank in der Mobilhydraulik bei einem Fahrzeug eingesetzt wird, wobei dann die Anordnung des Tanks im Raum von einer Position des Fahrzeugs abhängt. Beispielsweise können sich bei der Anordnung in einem Fahrzeug die Schenkel etwa parallel zu einer Fahrgestellebene erstrecken.In other words, the legs extend approximately parallel to the surface of the earth. Thus, there is preferably no gradient from the inlet to the outlet. That is, the legs can extend transversely to the direction of gravity. Of course there are deviations possible, for example when the tank is used in mobile hydraulics in a vehicle, in which case the arrangement of the tank in space depends on the position of the vehicle. For example, when arranged in a vehicle, the legs can extend approximately parallel to a plane of the chassis.
In weiterer Ausgestaltung der Erfindung kann vorgesehen sein, dass der Tank vorrichtungstechnisch einfach aus Kunststoff gebildet ist. Als äußerst kostengünstige Methode zum Herstellen des Tanks hat sich Rotationsformen erwiesen. Die U-förmige Ausgestaltung des Tanks ist hierfür vorteilhaft geeignet. Bei Bedarf ist denkbar, den Tank durch ein Kunststoffspritzgussverfahren herzustellen.In a further embodiment of the invention, it can be provided that the tank is made of plastic in a simple manner in terms of device technology. Rotational molding has proven to be an extremely cost effective method of manufacturing the tank. The U-shaped configuration of the tank is advantageously suitable for this. If necessary, it is conceivable to manufacture the tank using a plastic injection molding process.
Alternativ kann vorgesehen sein, den Tank als Blechtank auszubilden. Wandungen können dann beispielsweise stoffschlüssig, beispielsweise durch Schweißen, verbunden werden oder, zumindest teilweise, durch Biegungen ausgestaltet sein. Der erste Raumschenkel ist vorzugsweise von einem Schenkelboden begrenzt. Am Schenkelboden kann ein Diffusorvorsprung ausgebildet und/oder integriert sein, der sich in den Raumschenkel erstreckt. Durch den Diffusorvorsprung kann vorteilhaft die Flüssigkeitsströmung im Tankraum aufgespalten werden, so dass insbesondere kein sogenanntes Schwappen entsteht. Vorzugsweise ist der Diffusorvorsprung hierfür gegenüber der, insbesondere oben angeordneten, Rücklauföffnung ausgebildet. Alternativ oder zusätzlich ist denkbar, einen weiteren Diffusorvorsprung am zweiten Raumschenkel am Schenkelboden auszubilden, insbesondere gegenüber zur Nachsaugleitung, um eine Strömung verbessert zu führen. Die Anleitung des Diffusorvorsprungs gegenüber der Rücklauföffnung oder Rücklaufleitung hat den Vorteil, dass hier der größte Volumenstrom vorherrschen kann, wenn Flüssigkeit in den Tankraum strömt. Der Diffusorvorsprung kann mit anderen Worten in axialer geometrischer Verlängerung der Rücklauföffnung oder der Rücklaufleitung vorgesehen sein. Die Rücklauföffnung ist vorzugsweise oberhalb des Tankraums angeordnet. Die Rücklauföffnung kann beispielsweise derart gestaltet sein, dass Flüssigkeit etwa in Schwerkraftrichtung in den Tankraum strömt. Der Diffusorvorsprung verjüngt sich vorzugsweise nach innen in Richtung weg vom Schenkelboden. Er kann beispielsweise kegelförmig oder kegelstrumpfförmig oder pyramidenförmig oder rotationssymmetrisch ausgestaltet sein. Von außen gesehen ist denkbar, dass der Diffusorvorsprung konkav ausgestaltet ist. Er kann integraler Bestandteil des Schenkelbodens sein und beispielsweise durch das Rotationsformen zusammen mit dem Tank einfach hergestellt werden. Eine Wandungsdicke des Diffusorvorsprungs entspricht beispielsweise einer Wandungsdicke des Schenkelbodens. Mit anderen Worten ist in die Tankwand oder in den Tankboden eine Kegelgeometrie integriert, die die Ölströmung idealer im Tank aufspaltet. Eine Längsachse des Diffusorvorsprungs ist vorzugsweise koaxial oder etwa koaxial zu einer Längsachse der Rücklauföffnung. "Etwa" kann heißen, dass Toleranzen zugelassen werden, so dass die generelle Funktion des Diffusorvorsprungs ermöglicht ist. In weiterer Ausgestaltung, insbesondere alternativ oder zusätzlich, kann vorgesehen sein, dass eine Strömungsrichtung der aus der Rücklauföffnung austretenden Flüssigkeit auf den Diffusorvorsprung zeigt. Die Strömungsrichtung und eine Längsachse des Diffusorvorsprungs sind beispielsweise zumindest etwa im Parallelabstand zueinander angeordnet. Wie bereits angeführt, kann die Rücklauföffnung oberhalb vom Diffusorvorsprung angeordnet sein.Alternatively, provision can be made for the tank to be in the form of a sheet metal tank. Walls can then, for example, be connected in a material-to-material manner, for example by welding, or, at least in part, be configured by bending. The first spatial leg is preferably delimited by a leg base. A diffuser projection can be formed and/or integrated on the base of the leg, which extends into the space leg. The liquid flow in the tank space can advantageously be split up by the diffuser projection, so that in particular no so-called sloshing occurs. For this purpose, the diffuser projection is preferably formed opposite the return opening, which is in particular arranged at the top. Alternatively or additionally, it is conceivable to form a further diffuser projection on the second space leg on the leg base, in particular opposite the suction line, in order to guide a flow in an improved manner. The orientation of the diffuser projection opposite the return opening or return line has the advantage that this is where the greatest volume flow can prevail when liquid flows into the tank space. In other words, the diffuser projection can be provided in an axial geometric extension of the return opening or the return line. The return opening is preferably arranged above the tank space. The return opening can, for example, be designed in such a way that liquid flows into the tank space, for example in the direction of gravity. The diffuser projection preferably tapers inwardly away from the thigh bottom. It can, for example, be designed conically or in the shape of a truncated cone or pyramid-shaped or rotationally symmetrical. Viewed from the outside, it is conceivable that the diffuser projection has a concave design. It can be an integral part of the thigh base and easily manufactured together with the tank, for example by rotational molding will. A wall thickness of the diffuser projection corresponds, for example, to a wall thickness of the bottom of the leg. In other words, a cone geometry is integrated into the tank wall or into the tank bottom, which ideally splits the oil flow in the tank. A longitudinal axis of the diffuser projection is preferably coaxial or approximately coaxial with a longitudinal axis of the return opening. "Approximately" may mean that tolerances are allowed to allow for the general function of the diffuser boss. In a further embodiment, in particular alternatively or additionally, it can be provided that a flow direction of the liquid emerging from the return opening points towards the diffuser projection. The direction of flow and a longitudinal axis of the diffuser projection are arranged, for example, at least approximately parallel to one another. As already mentioned, the return opening can be arranged above the diffuser projection.
In weiterer Ausgestaltung der Erfindung sind die Schenkel vorzugsweise von einer Seitenwandung des Tanks begrenzt. Insbesondere kann der Tank als U-förmige Wanne ausgebildet sein. Denkbar wäre auch, den Tank als Wanne auszugestalten, der von einer inneren Wandung zweigeteilt ist, wobei die innere Wandung eine Durchgangsöffnung aufweist, um die durch die innere Wandung voneinander getrennten Raumschenkel miteinander zu verbinden, um somit eine etwa U-förmige Ausgestaltung zu erreichen.In a further embodiment of the invention, the legs are preferably delimited by a side wall of the tank. In particular, the tank can be designed as a U-shaped trough. It would also be conceivable to design the tank as a trough, which is divided in two by an inner wall, with the inner wall having a through opening to connect the space legs separated from one another by the inner wall, in order to achieve an approximately U-shaped configuration.
Vorzugsweise ist zwischen dem ersten und zweiten Raumschenkel ein Tankfreiraum gebildet. Dieser kann von einem ersten und von einem zweiten Seitenwandungsabschnitt begrenzt sein. Diese Seitenwandlungsabschnitte wiederum können jeweils den ersten und zweiten Raumschenkel begrenzen. Zwischen den beiden Seitenwandungsabschnitten kann dann den Querraumschenkel begrenzender Querseitenwandungsabschnitt vorgesehen sein. Die Seitenwandungsabschnitte und der Querseitenwandungsabschnitt können sich von einem Tankboden aus oder von Schenkelböden oder den Schenkelböden aus nach oben erstrecken. Vorzugsweise sind die Seitenwandungsabschnitte und der Querseitenwandungsabschnitt U-förmig ausgebildet und bilden somit eine U-förmige Innenwandung für die Schenkel.A free tank space is preferably formed between the first and second space leg. This can be delimited by a first and a second side wall section. These side conversion sections in turn can each delimit the first and second space legs. The transverse side wall section delimiting the transverse space leg can then be provided between the two side wall sections. The side wall sections and the transverse side wall section may extend upwardly from a tank bottom or from thigh bottoms or the thigh bottoms. Preferably, the side wall sections and the transverse side wall section are U-shaped and thus form a U-shaped inner wall for the legs.
In weiterer Ausgestaltung der Erfindung kann der Tankfreiraum, der von den Seitenwandungsabschnitten und dem Querseitenwandungsabschnitt begrenzt ist, oben, insbesondere in Schwerkraftrichtung gesehen, von einem Innendeckelabschnitt des Tanks verschlossen sein. Es ist denkbar, dass der Tankfreiraum nach unten hin, insbesondere in Schwerkraftrichtung gesehen, und/oder in Richtung weg von dem Querraumschenkel offen ist. Somit kann der Tankfreiraum nach innen hin geschlossen sein und nach außen hin geöffnet sein, wodurch dieser einfach herstellbar ist. Eine Höhe des Tankfreiraums ist vorzugsweise geringer als die Tankhöhe des Tanks. Hierdurch ist ermöglicht, dass der Innendeckelabschnitt bei Bedarf überspülbar ist. Bei Bedarf kann somit Flüssigkeit vom einen Raumschenkel über den Innendeckelabschnitt zum anderen Raumschenkel fließen.In a further embodiment of the invention, the tank space, which is delimited by the side wall sections and the transverse side wall section, can be viewed from above, in particular in the direction of gravity, from an inner cover section of the tanks must be closed. It is conceivable that the free space in the tank is open downwards, in particular as seen in the direction of gravity, and/or in the direction away from the leg of the transverse space. Thus, the tank clearance can be closed towards the inside and open towards the outside, making it easy to produce. A height of the tank clearance is preferably less than the tank height of the tank. This makes it possible for the inner cover section to be flushable if necessary. If required, liquid can thus flow from one space leg via the inner cover section to the other space leg.
Es ist denkbar, dass sich die Seitenwandungsabschnitte und bei Bedarf auch der Querseitenwandungsabschnitt in Richtung von unten nach oben annähern, womit auf einfache Weise das innere Tankvolumen des Tanks vergrößerbar ist und eine einfache Herstellung des Freiraums ermöglicht ist.It is conceivable that the side wall sections and, if necessary, also the transverse side wall section converge in the direction from bottom to top, whereby the inner tank volume of the tank can be enlarged in a simple manner and the free space can be produced easily.
Vorzugsweise hat der Tank einen Tankdeckel, der die Schenkelräume überdeckt. Dieser ist vorzugsweiser einstückig mit dem Tank ausgebildet und beispielsweise beim Rotationsformen hergestellt. Ist ein Freiraum mit einem Innendeckelabschnitt vorgesehen, so kann dieser zum Tankdeckel beabstandet sein. Denkbar ist auch, dass der Innendeckelabschnitt ein Teil des Tankdeckels ist.Preferably, the tank has a tank cap covering the leg spaces. This is preferably formed in one piece with the tank and is produced, for example, by means of rotational moulding. If a free space is provided with an inner cover section, this can be spaced apart from the tank cover. It is also conceivable that the inner cover section is part of the tank cover.
Vorzugsweise sind die Schenkel von einer äußeren Seitenwandung begrenzt, die insbesondere einstückig mit dem Tankdeckel verbunden ist und weiter vorzugsweise einstückig mit einem Tankboden oder den Schenkelböden oder Schenkelböden verbunden ist. Die äußere Seitenwandung umgreift vorzugsweise die inneren Seitenwandungsabschnitte mit dem Querseitenwandungsabschnitt derart, dass die U-förmigen Schenkel ausgebildet sind.The legs are preferably delimited by an outer side wall which is in particular connected in one piece to the tank cover and is more preferably connected in one piece to a tank base or the bases or bases of the legs. The outer side wall preferably encompasses the inner side wall sections with the transverse side wall section in such a way that the U-shaped legs are formed.
In weiterer Ausgestaltung der Erfindung sind die Schenkel von einer Bodenwandung von unten begrenzt. Diese kann beispielsweise einfach U-förmig ausgestaltet sein. Die äußere Seitenwandung ist dann vorzugsweise einstückig zwischen den Tankdeckel und der Bodenwandung ausgebildet. Die Schenkelböden können ein Teil der Bodenwandung sein.In a further embodiment of the invention, the legs are delimited from below by a bottom wall. This can, for example, simply be U-shaped. The outer side wall is then preferably formed in one piece between the tank cover and the bottom wall. The thigh bottoms can be part of the bottom wall.
Bei einer vorteilhaften Ausgestaltung ist der Querraumschenkel von zwei Außenwandungsabschnitten der äußeren Seitenwandung begrenzt. Ein Außenwandungsabschnitt ist dann vorzugsweise benachbart zum ersten Raumschenkel und der weitere Außenwandungsabschnitt benachbart zum zweiten Raumschenkel angeordnet. Zumindest einer der Außenwandungsabschnitte erstreckt sich vorzugsweise im Querschnitt gesehen, insbesondere quer zur Oben-Unten-Richtung gesehen, schräg bezüglich einer Längsachse des benachbarten Raumschenkels. Dieser Außenwandungsabschnitt erstreckt sich dabei derart, dass er die Flüssigkeit dabei vom benachbarten Raumschenkel hin zum weiteren Raumschenkel lenkt. Ist ein Freiraum vorgesehen, so reicht zumindest der eine schräg angeordnete Außenwandungsabschnitt hin zum Freiraum. Falls eine Trennwand, beispielsweise in einem Blechtank, vorgesehen ist, so weist der schräg ausgebildete Außenwandungsabschnitt hin zur Trennwand. Vorzugsweise sind beide Außenwandungsabschnitte schräg angeordnet. Die beiden Außenwandungsabschnitte sind dabei beispielsweise V-förmig oder etwa V-förmig zueinander angeordnet. Insbesondere sind die Außenwandungsabschnitte stirnseitig des Tanks vorgesehen, wobei sich der Tank von außen gesehen dann im Bereich des Querraumschenkels verjüngen kann. Durch die schräg angeordneten Außenwandungsabschnitte können Wellen und Turbulenzen in der Flüssigkeit vermieden werden. Mit anderen Worten dienen abgeschrägte Seitenwände zur Vermeidung von Wellen und Turbulenzen. Vorzugsweise sind die Außenwandungsabschnitte derart angeordnet, dass sie die Strömung jeweils um 90° oder um etwa 90° umlenken. Hierdurch wird ein Staudruck vermindert oder weitestgehend vermieden, was eben zur Reduktion der Wellenbewegung und Turbulenz führt. Mit anderen Worten weist der Tank abgeschrägte Ecken zur Strömungsumlenkung von einem Raumschenkel zum anderen Raumschenkel auf. Denkbar wäre auch, dass sich die Außenwandungsabschnitte sich entlang eines Bogens oder einer Kurve erstrecken.In an advantageous embodiment, the leg of the transverse space is delimited by two outer wall sections of the outer side wall. A The outer wall section is then preferably arranged adjacent to the first space leg and the further outer wall section is arranged adjacent to the second space leg. At least one of the outer wall sections extends, preferably viewed in cross section, in particular viewed transversely to the top-bottom direction, obliquely with respect to a longitudinal axis of the adjacent space leg. This outer wall section extends in such a way that it guides the liquid from the adjacent space leg towards the other space leg. If a free space is provided, at least the one obliquely arranged outer wall section extends towards the free space. If a dividing wall is provided, for example in a sheet metal tank, the obliquely formed outer wall section points towards the dividing wall. Both outer wall sections are preferably arranged at an angle. The two outer wall sections are arranged, for example, in a V-shape or approximately in a V-shape with respect to one another. In particular, the outer wall sections are provided on the front side of the tank, with the tank then being able to taper in the area of the lateral leg of the transverse space when viewed from the outside. Waves and turbulence in the liquid can be avoided by the obliquely arranged outer wall sections. In other words, sloping sidewalls serve to avoid waves and turbulence. The outer wall sections are preferably arranged in such a way that they each deflect the flow by 90° or by approximately 90°. As a result, a dynamic pressure is reduced or largely avoided, which leads to a reduction in wave motion and turbulence. In other words, the tank has beveled corners for deflecting the flow from one space leg to the other space leg. It would also be conceivable for the outer wall sections to extend along an arc or a curve.
Mit Vorteil ist in die Bodenwandung des Tanks eine U-förmige Vertiefung eingebracht, die sich entlang der Schenkel erstreckt. Die Vertiefung kann von außen gesehen konkav und von innen gesehen konvex ausgebildet sein. Denkbar wäre, dass die Vertiefungen eine oder mehrere Unterbrechungen aufweist. Die Vertiefung unterstützt zum einen die Strömungsführung und zum anderen kann sie vorteilhaft zu einer Versteifung des Tanks, insbesondere der Bodenwandung führen. Die U-förmige Vertiefung erstreckt sich vorzugsweise etwa im Parallelabstand zu den Schenkeln. Eine Breite der Vertiefung kann kleiner als eine bodenseitige Breite der Schenkel sein. Die Vertiefung ist vorzugsweise von den Wandungen beabstandet.A U-shaped indentation, which extends along the legs, is advantageously made in the bottom wall of the tank. The indentation can be concave as seen from the outside and convex as seen from the inside. It would be conceivable that the depressions have one or more interruptions. On the one hand, the indentation supports the flow guidance and, on the other hand, it can advantageously lead to a stiffening of the tank, in particular of the bottom wall. The U-shaped recess preferably extends approximately parallel to the legs. A width of the depression can be smaller than a bottom width of the legs. The recess is preferably spaced from the walls.
In weiterer Ausgestaltung der Erfindung kann die äußere Seitenwandung bei einem oder bei beiden Raumschenkeln zumindest oder jeweils zumindest eine innere Querrippe aufweisen. Diese kann sich etwa oder genau in Richtung von oben nach unten erstrecken. Die Querrippe führt insbesondere zu einer vorteilhaften Versteifung des Tanks.In a further embodiment of the invention, the outer side wall can have at least one inner transverse rib or at least one inner transverse rib for one or both space legs. This can extend approximately or exactly in the direction from top to bottom. In particular, the transverse rib leads to an advantageous stiffening of the tank.
Mit anderen Worten kann durch traverse Stege die mechanische Stabilität des Tanks verbessert werden.In other words, the mechanical stability of the tank can be improved by traverse webs.
Vorzugsweise hat der Tankdeckel des Tanks einen Flansch. Dieser kann derart ausgestaltet sein, dass dieser direkt oder über ein weiteres Bauteil mit einem Hydraulikblock verbindbar ist. Vorzugsweise hat der Flansch eine ringförmige Flanschfläche. Die Flanschfläche kann sich beispielsweise in einer Ebene erstrecken, insbesondere in einer Ebene quer zur Schwerkraft- oder Oben-Unten-Richtung. Die Flanschfläche umfasst vorzugsweise eine Deckelöffnung des Tankdeckels. Über die Deckelöffnung können einfach Leitungen für den Rücklauf und die Ansaugung in den Tank eingeführt werden. Über die Deckelöffnung sind vorzugsweise beide Raumschenkel zugänglich. Es ist denkbar, dass die beiden Raumschenkel über die Deckelöffnung nach oben hin offen sind, wobei die Deckelöffnung beispielsweise von einem Hydraulikblock abgedeckt sein kann. Die Deckelöffnung kann dann derart ausgestaltet sein, dass Leitungen des Hydraulikblocks über die Deckelöffnung in die Raumschenkel, insbesondere genau oder etwa in Schwerkraft- oder Oben-Unten-Richtung kragen.Preferably, the tank cap of the tank has a flange. This can be designed in such a way that it can be connected to a hydraulic block directly or via another component. Preferably the flange has an annular flange surface. The flange surface can, for example, extend in one plane, in particular in a plane transverse to the direction of gravity or the top-bottom direction. The flange surface preferably comprises a cover opening of the tank cover. Lines for the return flow and the intake can be easily inserted into the tank via the cover opening. Both space legs are preferably accessible via the cover opening. It is conceivable that the two space legs are open at the top via the cover opening, with the cover opening being able to be covered by a hydraulic block, for example. The cover opening can then be designed in such a way that lines of the hydraulic block cantilever over the cover opening into the space leg, in particular exactly or approximately in the direction of gravity or the top-bottom direction.
Vorzugsweise hat der Tank ein Traggestell, über das der Tank festlegbar ist. Das Traggestell kann beispielsweise U-förmig ausgebildet sein. Alternativ oder zusätzlich kann das Traggestell derart ausgestaltet sein, dass sich dieses an einer Bodenfläche oder einer Bauteilkomponente abstützt. Vorzugsweise ist eine Oberseite des Tanks mit dem Traggestell fest verbunden. Zumindest ist denkbar, dass ein Teil des Tankgewichts oder das gesamten Tankgewicht über die Oberseite vom Traggestell getragen wird. Das Traggestell kann den Tank übergreifen und sich an der Bodenfläche abstützen. Ist das Traggestell beispielsweise U-förmig ausgestaltet, so ist denkbar, dass der Tank zwischen den Gestellschenkeln angeordnet ist. In weiterer Ausgestaltung der Erfindung kann vorgesehen sein, dass das Traggestell über die Flanschfläche des Tanks, insbesondere über einen auf der Flanschfläche angeordneten Dichtring, mit dem Tank über Mittel befestigt ist. Als Mittel dienen beispielsweise Schraubverbindungen. Das Traggestell kann auch einen Flanschabschnitt aufweisen, der auf der Flanschfläche des Tanks befestigt ist und die Deckelöffnung umfasst. Vorzugsweise bildet der Flanschabschnitt die Verbindung zwischen den Gestellschenkeln. Des Weiteren ist denkbar, dass das Traggestell Stützbeine hat, über die das Traggestell an der Bodenfläche abstützbar ist und die mit dem Flanschabschnitt verbunden sind. Der Tank kann beispielsweise derart ausgestaltet sein, dass dieser sich zum einen an der Bodenfläche direkt und zusätzlich über das Traggestell abstützt. Somit ist eine sichere Befestigung des Tanks ermöglicht. Weiter vorzugsweise ist der Hydraulikblock am Traggestell befestigt. Vorzugsweise hat das Traggestell innerhalb des Flanschabschnitts Befestigungsabschnitte oder einen Befestigungsabschnitt für den Hydraulikblock. Der Tank ist somit nicht direkt mit dem Hydraulikblock verbunden, sondern über das Traggestell. Das Gewicht des Hydraulikblocks wird somit vorzugsweise über das Traggestell abgestützt und nicht über den Tank. Dieser kann somit einfacher ausgestaltet werden.The tank preferably has a support frame, via which the tank can be fixed. The support frame can be U-shaped, for example. Alternatively or additionally, the support frame can be designed in such a way that it is supported on a floor surface or a structural component. An upper side of the tank is preferably firmly connected to the support frame. It is at least conceivable that part of the tank weight or the entire tank weight is carried by the support frame over the top. The support frame can overlap the tank and be supported on the floor surface. If the support frame is U-shaped, for example, it is conceivable for the tank to be arranged between the frame legs. In a further embodiment of the invention, it can be provided that the support frame can be attached via the flange surface of the tank, in particular via a sealing ring which is arranged on the flange surface and is attached to the tank via means. Screw connections, for example, serve as means. The support frame may also have a flange portion which is fixed on the flange surface of the tank and encloses the lid opening. The flange section preferably forms the connection between the frame legs. Furthermore, it is conceivable that the support frame has support legs, via which the support frame can be supported on the floor surface and which are connected to the flange section. The tank can, for example, be designed in such a way that it is supported directly on the floor surface and also via the support frame. This enables the tank to be securely fastened. More preferably, the hydraulic block is attached to the support frame. The support frame preferably has attachment sections or an attachment section for the hydraulic block within the flange section. The tank is therefore not connected directly to the hydraulic block, but via the support frame. The weight of the hydraulic block is thus preferably supported by the support frame and not by the tank. This can thus be configured more easily.
In weiterer Ausgestaltung der Erfindung weist der Tank einen Kühlerablaufanschluss und einen Kühlerzulaufanschluss auf. Der Kühlerablaufanschluss ist vorzugsweise mit dem einen Raumschenkel und der Kühlerzulaufanschluss vorzugsweise mit dem anderen Raumschenkel verbunden. Somit kann Flüssigkeit von dem Tankraum entnommen werden und nach Durchlaufen des Kühlers in den Tankraum zurückgeführt werden. Vorzugsweise ist der Kühlerablaufanschluss mit dem ersten Raumschenkel und der Kühlerzulaufanschluss mit dem zweiten Raumschenkel verbunden. Über den Kühler kann somit Flüssigkeit vom Rücklaufanschluss zum Nachsauganschluss geführt werden, womit die Strömungsführung im Tank entlastet wird. Die Kühleranschlüsse sind vorzugsweise stirnseitig der Raumschenkel vorgesehen, insbesondere auf Seiten weg von dem Querraumschenkel. Die Anschlüsse sind dabei vorzugsweise in der äußeren Seitenwandung eingebracht. An dem Kühlerablaufanschluss und an dem Kühlerzulaufanschluss kann eine aktive Flüssigkeit- oder Ölkühlung angeschlossen sein. Diese kann das Öl beispielsweise zwischen zwei Kammern umwälzen. Hierdurch kann eine Kühlung des Tanks verbessert werden und ein Kurzschluss von dem Rücklaufanschluss zum Sauganschluss kann unterbunden werden. Durch die aktive Kühlung kann eine Reduzierung temperaturbedingter Ölalterung erfolgen.In a further embodiment of the invention, the tank has a cooler outlet connection and a cooler inlet connection. The cooler outlet connection is preferably connected to one space leg and the cooler inlet connection is preferably connected to the other space leg. Thus, liquid can be taken from the tank space and returned to the tank space after passing through the cooler. The cooler outlet connection is preferably connected to the first space limb and the cooler inlet connection is connected to the second space limb. Liquid can thus be routed via the cooler from the return connection to the suction connection, which relieves the flow in the tank. The cooler connections are preferably provided on the face side of the space leg, in particular on the side away from the transverse space leg. The connections are preferably introduced in the outer side wall. Active liquid or oil cooling can be connected to the cooler outlet connection and to the cooler inlet connection. This can circulate the oil between two chambers, for example. As a result, cooling of the tank can be improved and a short circuit from the return connection to the suction connection can be prevented. Active cooling can reduce temperature-related oil aging.
In weiterer Ausgestaltung der Erfindung hat der Tank einen oder mehrere Anschlüsse, insbesondere für: Den Kühlerablaufanschluss und/oder den Kühlerzulaufanschluss und/oder einen Anschluss für eine Füllstandanzeige und/oder einen Anschluss für einen Belüftungsfilter und/oder einen Befüllanschluss und/oder einen Ölablass und/oder einen Anschluss für einen Füllstandsensor und/oder zumindest einen Anschluss als Reserve für eine Funktion und/oder einen Anschluss für einen optischen Ölstandanzeiger. Die Anschlüsse sind dabei vorzugsweise in den Tank integriert. Weiter vorzugsweise weist der Tank in die Bodenwandung integrierter Befestigungsvorrichtungen auf, um den Tank am Boden zu befestigen.In a further embodiment of the invention, the tank has one or more connections, in particular for: the cooler outlet connection and/or the cooler inlet connection and/or a connection for a level indicator and/or a connection for a ventilation filter and/or a filling connection and/or an oil drain and /or a connection for a level sensor and/or at least one connection as a reserve for a function and/or a connection for an optical oil level indicator. The connections are preferably integrated into the tank. Further preferably, the tank has fastening devices integrated into the bottom wall in order to fasten the tank to the floor.
Beispielsweise sind Befestigungselemente in den Tank integriert, wie eingelegte Muttern, zur Befestigung des Tanks an einem Untergrund, oder zum Befestigen zusätzlicher Bauteile. Mit anderen Worten weist der Tank ein oder mehrere integrierte/s Funktionselement/e auf, wie beispielsweise Befestigungselemente zum Befestigen des Tanks und/oder zum Befestigen einer oder mehrerer Komponente/n.For example, fastening elements are integrated into the tank, such as inserted nuts, for fastening the tank to a substrate or for fastening additional components. In other words, the tank has one or more integrated functional element(s), such as fastening elements for fastening the tank and/or for fastening one or more components.
Neben der Rücklaufleitung kann in dem Tank eine weitere großvolumige Rücklaufleitung, insbesondere über die Tanköffnung, münden. Die Leitungen, also die Rücklaufleitungen und die Ansaugleitungen erstrecken sich vorzugsweise ausgehend vom Hydraulikblock frei in den Tankraum.In addition to the return line, another large-volume return line can open out into the tank, in particular via the tank opening. The lines, that is to say the return lines and the intake lines, preferably extend freely into the tank space, starting from the hydraulic block.
Die Tanköffnung und/oder Rücklauföffnung und/oder Tanköffnung umfasst zumindest einen Teil der Leitungen oder alle Leitungen, aber dichtet diese nicht ab, d. h. es sind keine Dichtmittel zwischen den Leitungen und der Öffnung notwendig. Der Anschluss der Leitungen erfolgt über den Hydraulikblock. Vorzugsweise handelt es sich bei der Rücklauföffnung und/oder der Ansaugöffnung und/oder der Tanköffnung somit um keinen Anschluss, weswegen der Tank vereinfacht ausgestaltbar ist.The tank opening and/or return opening and/or tank opening encloses at least part or all of the lines, but does not seal them, ie. H. no sealants are required between the lines and the opening. The lines are connected via the hydraulic block. The return opening and/or the suction opening and/or the tank opening is therefore preferably not a connection, which is why the tank can be configured in a simplified manner.
Erfindungsgemäß ist eine Anordnung mit dem Tank gemäß einem oder mehreren der vorhergehenden Aspekte und mit einem Hydraulikblock vorgesehen. Der Tank eignet sich besonders vorteilhaft für die Kombination mit dem Hydraulikblock.According to the invention, an arrangement with the tank according to one or more of the preceding aspects and with a hydraulic block is provided. The tank is particularly suitable for the combination with the hydraulic block.
Der erfindungsgemäße Tank weist ein vergleichsweise geringes Ölvolumen, insbesondere durch verbesserte Strömungsführung, auf. Die verbesserte Strömungsführung erfolgt insbesondere durch die Trennung von Rücklauf, Saugleitung und Nachsaugung und/oder durch die abgeschrägten Seitenwände. Bei dem erfindungsgemäßen Tank ist außerdem die Entgasung verbessert und es kann die temperaturbedingte Ölalterung reduziert werden, insbesondere durch Anschluss eines Kühlers. Es ist außerdem ein verbessertes Temperaturmanagement ermöglicht. Der Tank mit der Vielzahl von Funktionen kann beispielsweise mittels Kunststoff-Rotationsformen hergestellt werden. Vorzugsweise sind die Rücklauföffnung und die Ansaugöffnung Teil des Hydraulikblocks, wobei diese an Leitungen ausgebildet sein können. Die Leitungen können dann in den Tankraum ragen. Die Leitungen können vorzugsweise mit dem Hydraulikblock fest verbunden sein, insbesondere verschraubt sein. Somit benötigt der Tank keine Befestigungsmöglichkeit für die Leitungen, wodurch dieser weiter vorrichtungstechnisch einfach ausgestaltet werden kann. Mit anderen Worten sind tankseitige Anschlüsse im Hydraulikblock geschraubt und ragen in die Innenseite des Hydrauliktanks.Offenbart ist ein Tank mit Seitenwänden, einem Boden und einer Decke. Der Tank kann als U-förmige Wanne ausgeführt sein, wodurch der Strömungsweg von einer Saug- und einer Nachsaugleitung beim kleinen Bauraum maximiert ist.The tank according to the invention has a comparatively small oil volume, in particular due to improved flow guidance. The improved flow control is achieved in particular by separating the return line and suction line and suction and/or through the slanted side walls. In the tank according to the invention, degassing is also improved and temperature-related oil aging can be reduced, in particular by connecting a cooler. Improved temperature management is also made possible. The tank with the multitude of functions can be manufactured, for example, by means of plastic rotational molding. The return opening and the suction opening are preferably part of the hydraulic block, and these can be formed on lines. The lines can then protrude into the tank room. The lines can preferably be firmly connected to the hydraulic block, in particular screwed. The tank therefore does not require any fastening options for the lines, as a result of which it can be further designed in a simple manner in terms of device technology. In other words, tank-side connections are screwed into the hydraulic block and protrude into the inside of the hydraulic tank. A tank with side walls, a floor and a ceiling is disclosed. The tank can be designed as a U-shaped trough, whereby the flow path from a suction and a suction line is maximized in a small installation space.
Bevorzugte Ausführungsbeispiele der Erfindung werden im Folgenden anhand schematischer Zeichnungen näher erläutert. Es zeigen:
-
Figuren 1a bis 1e verschiedene Ansichten eines Tanks gemäß einem ersten Ausführungsbeispiel, -
in einer perspektivischen Darstellung den Tank gemäß dem ersten Ausführungsbeispiel,Figur 2 -
Figur 3 in einer Draufsicht einen Querschnitt des Tanks gemäß dem ersten Ausführungsbeispiel, -
in einer Seitenansicht einen Längsschnitt des Tanks gemäß dem ersten Ausführungsbeispiel,Figur 4 -
Figuren 5a bis 5c verschiedene Ansichten eines Tanks gemäß einem weiteren Ausführungsbeispiel, -
Fig. 6 in einer perspektivischen Darstellung eine Anordnung mit dem Tank gemäß dem ersten Ausführungsbeispiel und mit einem Hydraulikblock.
-
Figures 1a to 1e different views of a tank according to a first embodiment, -
figure 2 in a perspective view the tank according to the first embodiment, -
figure 3 in a plan view a cross section of the tank according to the first embodiment, -
figure 4 in a side view a longitudinal section of the tank according to the first embodiment, -
Figures 5a to 5c different views of a tank according to another embodiment, -
6 in a perspective view an arrangement with the tank according to the first embodiment and with a hydraulic block.
Gemäß
Gemäß
Gemäß
Gemäß
Gemäß
Gemäß
In der Rückansicht gemäß
Gemäß
Gemäß
Gemäß
Bei der Anordnung gemäß
Der Tank 1 weist vorzugsweise integrierte Funktionselemente auf. Hierbei kann es sich um Befestigungsmöglichkeiten handeln, die im Tankdesign integriert sind. Beispielsweise können eingelegte Muttern zur Befestigung des Tanks am Untergrund oder von zusätzlichen Bauteilen vorgesehen sein. Weitere Funktionselemente müssen beispielsweise nicht zusätzlich angebracht werden, sondern können bereits im Tankdesign integriert sein und durch das Rotationsverformen hergestellt sein. Durch Traversen, wie beispielsweise die Vertiefung 28 aus
Claims (10)
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DE102021203767.4A DE102021203767A1 (en) | 2021-04-16 | 2021-04-16 | Tank and arrangement with a tank |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49101186U (en) * | 1972-12-22 | 1974-08-30 | ||
EP0271702A2 (en) * | 1986-12-18 | 1988-06-22 | MAN Nutzfahrzeuge Aktiengesellschaft | Oil container for supplying hydraulic working circuits serving for accumulation and resumption of returned oil |
US20120055569A1 (en) * | 2009-06-01 | 2012-03-08 | Bycyrus International Inc. | Sealed hydraulic tank system for mining shovel |
JP2012225061A (en) * | 2011-04-20 | 2012-11-15 | Hitachi Constr Mach Co Ltd | Hydraulic oil tank of hydraulic working machine |
DE102013222908A1 (en) * | 2013-11-11 | 2015-05-13 | Mahle International Gmbh | hydraulic tank |
DE102018217903A1 (en) | 2018-10-18 | 2020-04-23 | Leica Microsystems Cms Gmbh | Inference microscopy |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018217930A1 (en) | 2018-10-19 | 2020-04-23 | Robert Bosch Gmbh | Tank for a hydraulic unit |
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2021
- 2021-04-16 DE DE102021203767.4A patent/DE102021203767A1/en active Pending
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2022
- 2022-04-11 EP EP22167628.1A patent/EP4074966A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49101186U (en) * | 1972-12-22 | 1974-08-30 | ||
EP0271702A2 (en) * | 1986-12-18 | 1988-06-22 | MAN Nutzfahrzeuge Aktiengesellschaft | Oil container for supplying hydraulic working circuits serving for accumulation and resumption of returned oil |
US20120055569A1 (en) * | 2009-06-01 | 2012-03-08 | Bycyrus International Inc. | Sealed hydraulic tank system for mining shovel |
JP2012225061A (en) * | 2011-04-20 | 2012-11-15 | Hitachi Constr Mach Co Ltd | Hydraulic oil tank of hydraulic working machine |
DE102013222908A1 (en) * | 2013-11-11 | 2015-05-13 | Mahle International Gmbh | hydraulic tank |
DE102018217903A1 (en) | 2018-10-18 | 2020-04-23 | Leica Microsystems Cms Gmbh | Inference microscopy |
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