WO1999022554A2 - Boitier pour loger des modules electroniques - Google Patents

Boitier pour loger des modules electroniques Download PDF

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Publication number
WO1999022554A2
WO1999022554A2 PCT/EP1998/006669 EP9806669W WO9922554A2 WO 1999022554 A2 WO1999022554 A2 WO 1999022554A2 EP 9806669 W EP9806669 W EP 9806669W WO 9922554 A2 WO9922554 A2 WO 9922554A2
Authority
WO
WIPO (PCT)
Prior art keywords
damper
hard disk
mounting surface
vibration damper
housing according
Prior art date
Application number
PCT/EP1998/006669
Other languages
German (de)
English (en)
Other versions
WO1999022554A3 (fr
Inventor
Philon Rothschild
Original Assignee
Philon Rothschild
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19812479A external-priority patent/DE19812479C1/de
Application filed by Philon Rothschild filed Critical Philon Rothschild
Priority to EP98958855A priority Critical patent/EP1048192A2/fr
Priority to AU14855/99A priority patent/AU1485599A/en
Publication of WO1999022554A2 publication Critical patent/WO1999022554A2/fr
Publication of WO1999022554A3 publication Critical patent/WO1999022554A3/fr
Priority to US10/099,375 priority patent/US6657858B2/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • G11B33/125—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a plurality of recording/reproducing devices, e.g. modular arrangements, arrays of disc drives
    • G11B33/127—Mounting arrangements of constructional parts onto a chassis
    • G11B33/128—Mounting arrangements of constructional parts onto a chassis of the plurality of recording/reproducing devices, e.g. disk drives, onto a chassis
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust

Definitions

  • the invention relates to housings for receiving electronic assemblies and constantly motor-driven assemblies, in which one or more hard disk (s) or other assembly (s) with a drive motor is or are held.
  • a computer is usually used to operate a personal computer, for example, in which a hard disk, an arithmetic unit, a floppy disk and other units are accommodated in a cuboid housing.
  • fans are usually installed, which maintain an air flow in the housing during computer operation for cooling the electronic and mechanical assemblies contained in the housing.
  • DE-GM 297 04 870 provides extensive structure-borne noise isolation by suspending a hard disk in O-rings made of rubber-elastic material and lining the housing - Inside made with cork / rubber mats. The disadvantage here is that, depending on the type of hard drive, the settings of the suspensions have to be made.
  • DE-OS 43 14 199 describes a device for dissipating heat from vibration-damped assemblies, which are located in a closed housing. It is questionable whether the cooling method described there is sufficient to adequately cool hard drives with a power loss of up to 20W through only conductive heat dissipation.
  • Computers are specified with an operating temperature of 35 ° C for medium latitudes and with 40 ° C for the warmer regions.
  • the hard drives available on the mass market are only offered with a maximum permissible surface temperature of 55 - 60 ° C.
  • the surface temperatures specified for maximum service life are usually 10 - 15 ° C below the maximum permissible temperature. This means that very effective cooling must be provided for a long service life.
  • the invention is therefore based on the object of providing measures on a computer of the type explained above which suppress the subjectively unpleasant sound radiation as much as possible.
  • the hard drive should be protected against usual bumps on the case.
  • Low-noise and fail-safe cooling measures are also intended to prevent thermal self-destruction of the hard disk.
  • the measures to be taken should be designed with a uniform concept that can be expanded in stages so that only the appropriate measures need to be implemented for the different performance classes.
  • the housing configuration should enable them to be mass-produced in a cost-effective manner, both with regard to the material rate and the required assembly steps. In connection with the addressed modular concept, an optimal cost reduction for a range of different computer models from one production is to be achieved.
  • Passive cooling in which forced ventilation of the motor-driven assembly by means of a fan is unnecessary, leads to a further reduction in noise emissions. If a motor-driven assembly is arranged in a ventilated shaft in such a way that the inside dimension of the shaft is dimensioned in relation to the wavelength of the sound pressure to be expected in such a way that the sound pressure is already dampened in the adjacent air medium when it is deployed, this leads to a further reduction in the Noise emission.
  • the hard disk is thus arranged, for example, in a holder which has a rigid damper support surface on the front side of the holder. This is attached, for example, with rivets to the fastening edges provided on the holder and thus forms a mechanical unit with the holder.
  • This unit is preferably mounted on the front panel of the chassis in the configuration described below.
  • the front plate is preferably as rigid as possible or additionally stabilized, for example by means of a stiffening plate provided in the mounting area.
  • the fastening elements engaging in the damper support surface, such as fastening screws or the like. are supported by a stiff damper mounting surface on the outside of the front panel.
  • a support surface vibration damper made of a semi-elastic material and between the damper mounting surface and the outside of the front panel is for example made of the same material em mounting surface vibration damper.
  • the semi-elastic material is designed so that it is considerably more elastic than the front panel but still has sufficient load capacity for the holder with the hard disk then held.
  • the fastening edges of the holder serve as an end stop for the fastening elements engaging the damper support surface. An adjustment of the fastening elements is therefore not necessary.
  • the whole Layer structure consisting of damper support surface, stiffened front panel, damper mounting surface and the two vibration dampers with the fastening elements coordinated in such a way that the two vibration dampers are under slight prestress when the fastening elements engaging in the damper carrier surface are at the stop. Due to the preloaded dampers, the fastening elements are then conditionally considered to be firmly connected to the damper fastening surface.
  • the rigid design of the two structurally designed surfaces has the effect that the vibrations generated by the hard disk are essentially only introduced vertically into the dampers.
  • the fastenings are always insulated from the base or holding layer between the two dampers and can be moved vertically to the damper plane or at a distance.
  • the above-mentioned stiffening of the front plate by means of a stiffening plate in the holding area of the holder can alternatively also be achieved, in particular in mass production, in that the holding surface or another suitable holder in the housing is given the required rigidity by braced deep embossing in the sheet metal.
  • the carrier and damper fastening surfaces explained above can alternatively also take any other geometrical shape, which fulfill the task of indirect flat contact with the damper surfaces.
  • the surface contact is not necessarily plane-parallel.
  • the dampers are also not necessarily to be designed with plane-parallel or regular surfaces.
  • the symmetrical design of the damper layers explained above is a low-pass filter with frequency-independent positive feedback on the front panel between the two dampers. Coupling is caused by the fact that two amphtudic, frequency-equal, 180 ° phase-shifted vibrations hit the front plate with the opposite direction vector. At medium or even high frequencies, positive feedback plays a subordinate role because the damping factor of this low-pass system is high. Due to the large design of the dampers, the use of a soft damper material with sufficient load capacity is possible. The stiff design of the damper support and mounting surface cause a strong distribution of the vertical vibration energy over the surface of the damper. A damping system designed in this way still has a sufficient damping factor even at low frequencies even under positive feedback conditions.
  • this frequency-dependent negative feedback condition almost completely (the necessary different damper layers cause an amphtudic difference) completely cancel out the vibrations in the mounting area.
  • Another prerequisite for the negative feedback condition is the choice of a damper material with an extremely low propagation speed of vibrations (considerably lower than in, for example, air) in order to influence the phase in the region of a half-wave ( ⁇ / 2) with the dimensions of the dampers that are possible here can.
  • the two dampers are made from different materials to further refine their damping characteristics or the dampers are constructed from several layers with different properties.
  • a construction may also be expedient which connects the damper support surface and damper fastening surface in a crosswise or force-deflecting manner and thus from the outset both plates only ever perform opposite movements.
  • holes or openings can be recessed in the support surface vibration damper and in the mounting surface vibration damper in accordance with the load distribution. This measure causes a different mass distribution of the damper mass in such a way that even with non-adjustable fastening elements, the hard disk unit maintains a right-angled fit to the front plate after assembly.
  • the elasticity of the dampers and thus the load-bearing capacity must be chosen such that no different compensations are required for the different load capacities required in the context of the inventions. This means that only one configuration of the plate damper is required for all assembly variants in mass production.
  • a correspondingly effective damping of the hard disk against impacts on the housing is now achieved by appropriate dimensioning of the damper layer thickness.
  • a rotary bearing for the mounting between the two push-pull dampers is formed on the front panel both in the horizontal and in the vertical direction. Due to the design of the damper surfaces and the position of the suspension points of the fastening elements engaging in the damper support surface, the shock absorbing effect is controlled in such a way that more degrees of freedom of movement arise in the vertical direction to the hard disk medium than in the horizontal direction. Thus, there is more shock absorption in the vertical direction than the horizontal direction. The shock sensitivity of a hard disk is always greatest in vertical Direction to the medium, since the writing / reading heads move extremely close along the medium.
  • the inexpensive damper system according to the invention thus brings about both a reduction in noise in the housing and extremely effective shock absorption and thus protection of the hard drive which is sensitive to impacts.
  • the holder assigned to the hard disk can be designed differently depending on the requirements and, in addition to holding a hard disk, can also be used to hold further components, as will be described below.
  • the high-frequency vibrations emanating from the hard drive can be amplified by resonances with the holder or the other components or their combinations of high-frequency noises.
  • a vibration-damping intermediate layer is arranged between the hard disk and the holder, which has high damping for high-frequency vibrations, according to the invention.
  • the hard disk, the vibration-damping intermediate layer and the holder are in large-area contact in order to distribute the vibration energy well over the surfaces, so that a maximum yield of the damping effect is achieved.
  • Hard rubber washers, to which washers are attached, for example made of metal, are particularly suitable as supports. For a better distribution of the contact pressure of the fastenings engaging in the hard disk on the side walls of the mounting, a summary of the documents relating to a flat component has proven to be advantageous within the scope of the invention.
  • the individual hard rubber discs now form a rectangular, elongated rubber part with several, in the special case e.g. three through openings and a correspondingly shaped metal piece with three through openings.
  • the torque distributor bridge is designed in such a way that it distributes the respective tightening forces of the fastening elements evenly over the hard rubber base on the bracket side wall.
  • a 4 mm thick steel sheet has proven to be expedient.
  • the same effect can be achieved with other configurations such as a U-profile made of thinner sheet metal.
  • This means that the module is almost completely isolated from the bracket with regard to high-frequency structure-borne noise.
  • the still relevant radiation area for high-frequency vibrations is limited to the surface of the hard disk and, on the other hand, there is additional vibration damping.
  • the fact that vibrating contact surfaces to the surrounding air medium are reduced to the minimum of the hard disk surfaces is particularly advantageous
  • the damper support surface and the slot around the hard disk which is formed by the bracket itself or by the holder and the overlying cage, which is formed by the High-frequency sound emitted from the hard disk into the surrounding air, reflected from the front of the case towards the rear of the case.
  • the inside of the housing cover and the base plate of the chassis can be at least partially lined with a flame-retardant layer material in order to further reduce the noise.
  • dam mats becomes unnecessary, as will become apparent in the further course of this description.
  • the anti-vibration intermediate layer additionally has good thermal conductivity, that the intermediate layer has at least one large-area contact with two Side walls of the holder has that at least parts of the surfaces of the holder are exposed to the air circulation prevailing in the housing, and that the holder (s) is or are made of a good heat-conducting material.
  • the largest heat sources of the hard disk are formed by the drive for the hard disk medium and the servo of the write / read heads. These are usually firmly connected to an aluminum die-cast part, which forms the hard disk body.
  • the best possible heat removal takes place on the two long sides of the hard drive body, which are also used for fastening and - to a limited extent - on the back.
  • the long sides of the hard disks usually have bumps, it is necessary to design the attachment in such a way that the bracket side walls press the vibration-damping and heat-conducting intermediate layer against the long sides of the hard disk with sufficient contact pressure in order to make the best possible surface contact with the hard disk.
  • This fact is favored by the fact that the same measure, in the above-described high-frequency vibration damping, is also required, and thus there is no constructive contradiction to the combination of the two measures.
  • a vibration-damping intermediate layer with good thermal conductivity of a thickness of approximately 0.45 mm is sufficient to sufficiently dampen, to compensate for the unevenness by appropriate contact pressure and to produce a high heat dissipation to the holding device Invention e aluminum material used for the bracket.
  • the aluminum bracket with the good thermal connection to the hard disk forms a considerably larger cooling surface for the hard disk.
  • a bracket made of aluminum has the function of a heat sink in addition to the bracket function. If the holder is at least partially in the airflow of the case fan, this passive cooling is sufficient for hard disks up to medium power in most cases.
  • the vibration-damping intermediate layer it is expedient to use a tape material made of silicone-rubberized Isohermate ⁇ al for the vibration-damping intermediate layer.
  • the silicon material it is also conceivable for the silicon material to be coated directly onto the holder. A coating on the long sides of the hard disk is also conceivable.
  • the silicone tape is also generally referred to below as a vibration-damping intermediate layer.
  • cooling fins or heat sinks are added to a holder which is assigned to a hard disk to increase the cooling capacity.
  • These cooling elements expediently protrude at least partially into the air flow generated by the main housing fan (s).
  • the cooling fins are preferably arranged on the outside of the holder. The heat dissipated from both mounting side walls can thus be conducted directly into the cooling elements in the shortest possible way. Holders made of copper material or other good heat-conducting materials are also conceivable here.
  • an increased cooling capacity can be achieved by means of a fan attached to the side wall of the holder.
  • a group of through openings are provided on the wall of the bracket above and below the hard disk, which together form a passage for the air flow generated by the fan.
  • a seal as a base between the side wall and the fan. This fulfills the manufacturer's requirements for ventilation by means of an air stream above and below the hard disk.
  • the fastening elements for the fan engaging the bracket side wall are supported directly on the fan and are guided through holes in the seal.
  • threads or self-tapping threads are expediently provided in the holder side walls.
  • the seal must have a passage for the bridge at least at one point. This enables sufficient airflow above and below the hard disk.
  • the invention enables that even if the hard disk fan fails, the currently strongest 1 inch height hard disks do not exceed their permissible maximum temperature even at an ambient temperature of 40 ° C.
  • the fact that even the strongest hard drives with an intact cooling system up to the most extreme ambient temperatures can still be kept close to the temperature specified by the manufacturer for maximum service life seems far more important. In this respect, a very important contribution is made to the lifespan of the hard drives.
  • This cooling method is not limited to 1 inch hard drives. Due to adapted geometric designs, this method can also be used for the 1.6-inch (and larger) height hard drives available on the market.
  • the heat sink is an integral part of the holding device assigned to the hard disk.
  • the simplest version is e.g. around a bracket made of two aluminum U-profiles, each of which is firmly connected to the damper support surface on one end.
  • the hard disk is installed between the two webs of the U-profiles as previously explained.
  • the legs of the U-profiles form an almost complete slot around the hard disk in the longitudinal direction above and below the hard disk. The remaining gap between the legs of the U-profiles is negligible in terms of sound and flow.
  • one or more hard disk (s) are, as explained above, assigned to one or more holder (s)
  • the holder form a slot around the hard disk so that the distances between the upper and Underside of the hard drive and the corresponding shaft sides are dimensioned such that ⁇ / 4 of the highest acoustic interference frequency are not exceeded so that the structure forming the shaft around the hard drive cannot be excited by the hard drive to resonate vibrations that at least on one side of the shaft partial reflection of sound waves takes place and that the inside of the shaft, the top and bottom of the hard disk are exposed to the air circulation in the housing. This prevents the sound pressure from developing fully within the shaft.
  • the harmonic content of the acoustic disturbance variables which is then perceptible as a quiet noise.
  • the remaining harmonic content of a frequency spectrum by filtering out spectral components using high-pass filters, is also known as pink noise.
  • the ⁇ / 4 dimensioning of the shaft is therefore a mechanical high-pass filter.
  • This mechanical ⁇ / 4 high-pass filter thus causes a strong vibration damping of the air medium excited by the hard disk in the immediate vicinity of the hard disk surfaces. The effect of this measure is so strong that insulation mats can be dispensed with.
  • the air intake of the housing now takes place by means of aligned bores through the damper layers and the plates in such a way that the hard disk and holder receive freshly sucked-in air for cooling directly from the outside of the housing.
  • This creates a group of holes outside the U-profile shaft and a group of holes inside the shaft.
  • an air flow is now simultaneously maintained on all surfaces of the hard disk and the cooling holder.
  • an enormous cooling capacity is already achieved using small amounts of materials, e.g. Aluminum, and achieved with significantly lower air flow.
  • a fan is no longer required even for cooling the most powerful hard disks.
  • the cooling capacity can be further increased by expanding the U-profiles with cooling fins.
  • the space requirement in the housing and the weight of the hard disk mounting unit are considerably lower.
  • the noise is further reduced.
  • all that remains is a main fan in the power supply to maintain an air flow in the case.
  • the hard disk is now attached completely freely between two dampers. It is now advantageous that no fastening elements have to penetrate a mounting surface. For this it is necessary that suitable mounting surfaces are first arranged on two opposite sides of a hard disk. Carrier surfaces and mounting surface vibration damper are now molded parts, each of which additionally encompasses the damper carrier surface and mounting surface of the hard disk on all sides. The opposing mounting surfaces either contain integrated or additionally attached sleeves, which in turn each encompass the support surface and the mounting surface vibration damper. Is the damper mounting surface on the front of the hard drive, and this is an independent component, a suitable opening for the bus and supply plug is provided on the corresponding mounting surface, on the damper mounting surface and on the mounting surface vibration damper.
  • FIG. 1 is a perspective view of a housing designed in the manner according to the invention after removal of the housing cover;
  • Fig. 2 is a sectional view of a hard disk unit from behind, consisting of fan, seal, bracket, damper support surface, hard disk, vibration-damping thermal interface, fasteners of the hard disk, heat sink, fasteners of the heat sink, each with a sectional plane through the fasteners of the heat sink and a sectional plane the middle fasteners of the hard drive;
  • Fig. 3 is a side view of the bracket without fan, which with the for deep
  • Fig. 4 is a schematic view of a Garmng compared to the embodiment of FIGS. 2 and 3, in which the
  • Carrier plate vibration damper is attached directly to the hard disk without the intermediary of a separate damper carrier surface
  • FIG. 5 shows a hard disk unit in which the carrier surface vibration damper has a separate part which forms part of a holder
  • Damper support surface is connected to the damper assembly
  • 6 and 7 are a side view and a rear view of a compared to in
  • FIGS. 3 and 2 modified hard drive unit with a hard drive holder consisting of two parts with a U-shaped cross section and holding the hard drive to form shafts on the top and bottom;
  • Fig. 8 is a sectional view through a tunable damper assembly in
  • FIG. 9 shows a perspective interior view of a housing cover with layered material plates for sound insulation
  • Damper assembly arranged in the end face, in which the holding face is arranged on the outside of the carrier face vibration damper facing away from the hard disk.
  • Hard disk unit in which the carrier surface vibration damper and the mounting surface vibration damper of the damper assembly are each in direct contact on opposite sides of the
  • Hard disk are arranged
  • 16 and 17 a solution which is functionally comparable to the exemplary embodiment according to FIGS. 14 and 15, in which the carrier surface vibration damper and the fastening surface vibration damper are assigned to opposite sides of the hard disk, but the damper is provided via a separate damper carrier surface or damper mounting surface are connected to the hard disk; 18 and 17 a hard disk unit which has been further developed compared to the exemplary embodiment according to FIGS. 16 and 17, in which the hard disk is arranged using a vibration-damping intermediate layer in a holder composed of two holder parts; 19 and 20 each show a schematic sectional view and top view of a
  • Hard rubber underlay as vibration decoupling of the hard disk fastenings as can be used in the exemplary embodiments according to FIGS. 18, 12 and 13, FIGS. 6 and 7 and FIGS. 2 and 3;
  • 21 and 22 corresponding views of a torque distributor bridge which can be used in conjunction with the hard rubber base according to FIGS. 19 and 20 as a base for the hard disk fastening; 23 and 24 support surface or mounting surface vibration damper with
  • 25, 26 and 27 are top views of a bore surface and Fastening surface vibration damper which, with aligned 6 and 7 holes, which allow the flow of cooling air through the damper assembly;
  • Fig. 28 is a plan view of a vibration damper, such as in the embodiment of Figures 10 and 11 as
  • 29 is a plan view of a carrier surface or fastening surface.
  • Vibration damper as used in the embodiment according to Figures 14 and 15, with through holes for
  • Hard disk are provided for plug connections
  • damper assemblies used support surface or mounting surface vibration damper.
  • the housing according to the invention is described as sound-absorbing and / or shock-absorbing with a motor-driven assembly, which in the special case is formed by a hard disk.
  • the block-shaped housing made of conventional sheet metal, designated in its entirety by 1, has a framework 2, on the front of which a front plate 33 with operating elements (not shown) and a base plate 4 are fastened.
  • a main fan 5 is installed in the rear upper part of the housing 1 and blows the internal air out of the housing 1 through the power supply unit 53 and further through slots 7 in the rear wall 6.
  • the auxiliary fan 9 which is attached in the lower part of the front plate 33, sucks in the outside air through slots (not shown) in the front plate 33 and blows it into the interior of the housing 1.
  • the arrangement of the main fan 5 and the additional fan 9 guides the cooling air flow approximately diagonally through the interior of the housing 1.
  • the cage 29 contains a floppy disk holder with a built-in floppy disk 45.
  • a cage-like holder 10 in the illustrated case consisting of a side wall 12 with a fastening edge 71, a side wall 14 opposite the side wall 12 with a fastening edge 73, a manhole bottom 16 with a fastening edge 72, is inserted into the fastening edge 71 engaging rivets 22, 24, by the rivets engaging in the fastening edge 73, rivets 26, 28 and the rivets engaging in the fastening edge 72, not shown, fastened to the damper support surface 50.
  • a hard disk 20 is held between the two side walls 12 and 14 by means of screws 11, 13, 15, 17, 19, 21 in the holder 10.
  • the hard disk 20 includes, among other things, a drive, not shown, which drives the storage medium at the usual high speeds and a servo, not shown, which drives the write / read head.
  • the unit explained above consisting of a holder 10 with a damper support surface 50 and the then mounted hard disk 20, is - as can be seen in particular in FIG. 3 - attached to the support surface 3 with a stiffening plate 52 in such a way that between the damper support surface 50 and a mounting surface vibration damper 51 is arranged on the mounting surface 3 with the stiffening plate 52.
  • the surface of the support surface vibration damper 51 extends essentially over the entire surface of the damper support surface 50 and separates it in structure-borne noise from the mounting surface 3 with stiffening plate 52.
  • the surface of the mounting surface vibration damper 74 extends essentially over the entire surface of the damper mounting surface 55 and separates it from the mounting surface 3 in terms of structure-borne noise.
  • the fastening elements (screws) 23, 25, 27 are insulated from the holding surface 3 and the stiffening plate 52 and are easy to move.
  • the carrier surface vibration damper 51 has a layer thickness of approximately 16 mm and the fastening surface vibration damper 74 has a layer thickness of approximately 8 mm. Both dampers 51 and 74 are made of an identical semi-elastic, soft material. Both dampers 51 and 74 thus have excellent damping properties in the lower frequency range.
  • the fastening elements (fastening screws) 23, 25 and 27 engaging in the damper support surface (50) hold both dampers 51 and 74 under slight pre-tension if they have the stop position during assembly.
  • the fastening edges 71, 72 and 73 of the holding member 10 form the stop for the fastening elements 23, 25 and 27.
  • the phase shift of the damper system is designed to be adjustable, which allows the push-pull coupling explained above to be optimized.
  • a tuning plate 75 is inserted between damper mounting surface 55 and mounting surface vibration damper 74.
  • the tuning plate 75 is guided through bores, not shown, on the shafts of the fastening elements 23, 25, 27, not shown.
  • In the geometric center of the damper mounting surface 55 there is a boring, not shown in detail, with a threaded attachment 77.
  • the set screw 76 engaging in the threaded attachment 77 passes through the damper mounting surface 55 and is supported on the tuning plate 75.
  • the tuning plate 75 By turning the adjusting screw 76, the tuning plate 75 can be pressed off the damper mounting surface 55. This causes a change in the layer thickness of the mounting surface vibration damper 74 and of the carrier surface vibration damper 51. Analogously, as shown in FIG. 12, the tuning plate 75 is arranged such that it can be adjusted outwards against the holding surface 3.
  • the hard disk unit explained above relative to the front plate 33, the two dampers 51 and 74 according to FIGS. 23 and 24 contain compensation holes 31 arranged according to the load distribution.
  • the hard disk 20 and the holder 10 there is a broad vibration-damping intermediate layer 30 on all sides of the two hard disks (not shown) - long sides and back, i. H. interposed along the two side walls 12, 14 and along the damper support surface 50.
  • the width of the vibration-damping intermediate layer 30 extends essentially over the entire height of the hard disk 20 and, with good surface contact, causes the hard disk 20 to be damped in the high-frequency acoustic spectrum.
  • the fastening screws 11, 13, 15, 17, 19, 21 which engage in the hard disk 20 are supported on the bracket 10 via the two torque distribution bridges 61 and 63 and between the torque Distributor bridge 61 and the side wall 12 attached vibration-isolating rubber pad 62 and the vibration-isolating rubber pad 64 attached between the torque distributor bridge 63 and the side wall 14.
  • the surface of the two rubber pads 62, 64 and the two torque distributor bridges 61, 63 are each identical and are shown in detail in FIGS. 19, 20 and 21, 22. So the pad 62 is made of hard rubber.
  • Central projections 37 rise from the surface of the hard rubber base 62 and protrude into bores (not shown) in the side wall 12, 14.
  • the base 62 is provided in the center of the lugs 37 with through holes 35 for the screws 11, 13, 15, 17, 19 and 21.
  • the central lugs 37 prevent the fastening screws 11, 13, 15, 17, 19, 21 from touching the two side walls 12, 14. If the fastening screws 11, 13, 15, 17, 19, 21 are tightened, the two torque distribution bridges are tensioned 61, 63 over the two hard rubber pads 62, 64, the two side walls 12, 14 and the vibration-damping intermediate layer 30 firmly and flatly on the two long sides, not shown, of the hard disk 20.
  • the high-frequency acoustic vibrations of the hard disk 20 are damped with the intermediate layer 30 and with the two hard rubber pads 62, 64 decoupled from the Garmng 10.
  • the damped high-frequency vibrations of the hard disk 20 can now only be emitted to the surrounding air medium in the housing 1 via the upper side 78 and the underside of the hard disk 20, not shown.
  • the above-mentioned, 0.45 mm thick silicone rubberized Isohermate ⁇ al used as vibration-damping intermediate layer 30 also has good thermal conductivity properties, as is evident from its thermal conductivity of about 0.0021 cal / cm s ° C.
  • the silicone rubberized Isohermate ⁇ al not only provides excellent damping for high-frequency structure-borne noise, but also additional heat dissipation of the waste heat emanating from the hard disk 20 directly to the two side walls 12, 14 of the holder 10 and also directly to the damper support surface 50.
  • the thermal surface of the hard disk 20 is simultaneously increased.
  • the Bracket 10 consists of an aluminum material and is at least partially in the airflow of the case fans 5 and 9, a hard disk 20 medium power can be effectively cooled passively.
  • the bracket 10 with the side walls 12, 14 and the shaft bottom 16 has the character of a heat sink.
  • a heat sink 18 with a plurality of cooling fins 85 is fastened to the shaft bottom 16 of the two mounting sides 12, 14 with good heat-conducting properties.
  • the screws 56, 57 engaging in the heat sink 18 and other screws (not shown) or a plurality of such fastening elements are supported by a torque distributor plate 70 on the inside of the shaft bottom 16 and ensure effective heat transfer between the shaft bottom by means of a sufficient contact force 16 and the heat sink 18.
  • a main heat dissipation path is formed, which is the shortest way from the two, not shown, long sides of the hard disk 20, via the heat-conducting intermediate layer 30, to the side walls 12, 14 of the holder 10 and with the shaft bottom 16 directly the heat sink 18 runs.
  • a heat conductor 60 can be attached between the shaft bottom 16 and the heat sink 18.
  • the heat conductor 60 can be made of any material suitable for this purpose.
  • the cooling fins 85 of the heat sink 18 are, as shown in particular in FIG. 1, at least partially the diagonal cooling air flow of the case fans 5 and 9 with the mentioned inlet openings on the underside of the front plate 33 and the mentioned outlet protector 7 on the rear wall 6.
  • the heat sink 18 carries considerably for heat dissipation and thus for cooling the hard disk 20.
  • a hard disk fan 40 is mounted on the side wall 12 to the side of the hard disk 20.
  • a corresponding passage is required on the side wall 12 in order to pass on the air sucked in by the fan 40 to the hard disk 20.
  • FIG. 3 there are a group of through openings 41 and 42 above and below the hard disk 20. Between the through openings of the group 42 there are spaces 43 which still provide adequate heat dissipation through the metal of the side wall 12 on the shaft bottom 16 allow at these points.
  • drive threads 36 are provided on the side wall 12 for fastening the hard disk fan 40. As can be seen in FIG.
  • FIG. 4 This basic concept of the hard disk assembly is illustrated in a still simplified form in FIG. 4, where the damper support surface 50 is not formed on its own component but on the hard disk 20 itself, i.e. the carrier surface vibration damper 51 is attached directly flat to an outer surface of the hard disk housing.
  • This simplified form of assembly is possible in particular in the case of vertical mounting of hard disks 20 which have an overall height of 1.6 inches or more. Due to their size, such a hard disk 20 offers sufficiently large outer surfaces for direct flat installation of the dampers.
  • the fasteners 23, 25, 27 engage in the thread 88 em, which are embedded in the hard disk housing. The end stop for the fastenings 23, 25, 27 is determined by the immersion depth of the thread 88.
  • a separate damper support surface 50 is provided in the form of the separate plate shown, which in turn establishes the connection to the hard disk 20 by direct screwing, not shown, with or as part of a separate hard disk holder.
  • the fastenings 23, 25, 27 engage in threads, not shown, which are embedded in the damper support surface 50.
  • the end stop for the fasteners 23, 25, 27 is formed by the side surface of the hard disk 20.
  • the basic assembly concept of the exemplary embodiment described according to FIGS. 2 and 3 or 5 is modified in that the hard disk 20 is arranged within a two-part holding device 10, the holding parts 10a and 10b of which are each of a basically U-shaped cross section. Shaped profile are formed, which are pushed from the opposite longitudinal sides of the hard disk 20 with the legs 79, 80, 81, 82 over the top 78 and bottom of the hard disk 20.
  • the cooling fins 85 provided on the outer sides of the holding parts 10a, 10b, the cooling body 18 is, so to speak, an integral part of the holding element 10.
  • the fastening edges, not shown here, of the holding parts 10a, 10b are formed by the respective end faces of the holding parts 10a, 10b.
  • the damper support surface 50 is firmly connected to the end faces of the mounting parts 10a, 10b by screw connections, not shown.
  • the end stop for the fastenings 23, 25, 27 is formed by the end faces of the mounting parts 10a, 10b.
  • the bracket 10 composed of the bracket parts 10a and 10b is dimensioned in its clear internal dimension so that between the top 78 and the bottom of the hard disk 20 and the inside of the facing surfaces of the bracket 10, which are from the legs 79, 81 of part 10a and the legs 80, 82 of part 10b of the bracket 10 are formed, each em shaft 39 is formed.
  • the shaft 39 can be flowed through with air drawn in from the rear of the bracket 10 if the vibration dampers 74 and 51 m are provided with openings or bores 66 and 68 in the manner illustrated in FIGS. 25, 26 and 27, to which at least m is plate-shaped Damper mounting surface 55 (in the embodiment according to FIGS. 6 and 7) and the separate damper support surface 50 adjoining the support surface vibration damper 51 are assigned aligned openings or bores 66 and 68, respectively.
  • 66 channels are formed through the aligned inner bores provided in the parts of the damper assembly, which channels open into the shafts 39.
  • the damper fastening surface 55 is also seated on the rear side of the damper carrier surface 50 and is supported from there via the fastening surface vibration damper 74 on the rear side of the damper carrier surface 50.
  • the fastening elements (screws) 23, 25, 27 engaging the damper fastening surface 55 are supported either on the holding surface 3 or on a tuning plate 75 which is still connected upstream.
  • the Carrier surface vibration damper 51 also sits here between damper support surface 50 and holding surface 3. The construction variants of this second category are recommended, for example, if there is only a small amount of space available between front plate 33 and front panel (not shown). Accordingly, the hard disk unit protrudes deeper into the interior of the housing 1.
  • dampers are now designed as molded parts with lateral shoulders 97 and 98, which enclose the hard disk 20 m in each case in direct contact on two opposite sides.
  • the damper support surface 50 and the damper mounting surface 55 are thus formed integrally from two opposite sides of the hard disk 20 itself.
  • the bracket designated as 91 for the hard disk unit connects two mounting surfaces 92 and 93 on two opposite sides of the hard disk 20.
  • the bracket 91 is shown as a cuboid housing.
  • the vibration dampers 51 and 74 are fixed by the mounting surfaces 92 and 93 and sleeves 90 and 99 connected to them on the opposite sides of the hard disk 20.
  • the hard disk 20 is held between the vibration dampers 51 and 74 with at least a slight prestress.
  • the lugs 98 and 97 are asymmetrical in their layer thickness. This enables negative feedback of the horizontal vibrations emanating from the hard disk 20.
  • through openings 95 and 96 for the power plug 59 and the data plug 58 on the hard disk 20 are provided in the holding surface 92 and the subsequent mounting surface vibration damper 74.
  • the passage opening 95 and 96 are dimensioned such that the plugs 58 and 59 cannot come into contact with the holding surface 92.
  • the holes to be provided for the flow through the holder are accordingly aligned holes 66 and 68 are formed in the damper mounting surface 55 and the damper support surface 50, the respectively adjoining area of the associated vibration damper 51 and 74 and the outer mounting surfaces 92 and 93 of the holding member 91.
  • Through holes 95 and 96 for the power plug 59 and the data plug 58 on the hard disk 20 are provided in the mounting surface 92, the subsequent mounting surface vibration damper 74 and the damper mounting surface 55.
  • the aligned bores 68 and the shaft 84 now maintain a uniform air flow on the outside of the holder 10, which does not contain air that has already warmed up in the housing 1 is mixed. If the holder 10 is supplemented with cooling fins 85, as shown in FIGS. 6 and 7, a maximum of passive cooling power is achieved within the scope of this invention. It is particularly advantageous that the opposite end faces of the shaft 39 (FIG. 18) provided with bores 66, which in the exemplary embodiment described here are formed by the damper support surface 50 and damper fastening surface 55, on both sides of the shaft 39, from partially reflect the remaining sound pressure emanating from the hard disk 20. Measurements showed that the remaining noise emission is now essentially only determined by the main fan 5.
  • the support 91 is designed in such a way that its resonance frequencies are above the frequencies of the hard disk 20 that it still achieves, with little or no attenuation.
  • the unit formed from the hard disk 20 and the inventive configurations in the third category can now e.g. than 5 '/. Inch standard insert. Direct mounting on a mounting surface 3 with aligned bores 66 and 68 is also advantageous.
  • FIGS. 30 and 31 show top views of the vibration dampers 51 and 74, which are used as shaped bodies and are used in the above exemplary embodiments and are to be arranged on opposite sides of the hard disk.
  • the vibration dampers 74 and 51 illustrated with FIGS. 30 and 31 can be varied in their contact area, if necessary, by means of a relaxation 94.
  • the cooling capacity achievable for the hard disk 20 in the exemplary embodiment according to FIGS. 2 and 3 depends on the dimensioning of the heat sink 18, the holder 10 and the configuration of the fans 9 and / or fans 40. Measurements on the dimensions carried out within the scope of the invention yielded a maximum cooling capacity without Fans 9 and 40 of 1.25 KW and with both fans 9 and 40 a cooling capacity of 0 75 K / W in the embodiment according to 6 and 7 (only without fan) a cooling capacity of 0.95 K / W could be determined. In the exemplary embodiment according to FIG. 18, it is even 0.85 K / W.
  • each hard disk 20 to 20 W input power can be cooled without fan 40 without the risk of exceeding the permissible operating temperature.
  • the holder 10 can be formed in e-parts or in several parts and is not always used for holding the hard disk 20. It can be seen that within the scope of the inventive concept, modifications and developments of the described exemplary embodiments can be implemented, in which the bracket 10 is used only as a heat sink.
  • the damper support surface 50 and the damper mounting surface 55 are either an integral part of the hard disk 20 or separate components which are fixedly connected to the hard disk 20 or separate components which are fixedly connected to a bracket 10 or are integral Components of the Garmng 10. Further possible modifications and developments of the described embodiments relate, for example, to the geometric shape and design of the vibration dampers 51 and 74.
  • the support surface vibration damper 51 and the mounting surface vibration damper 74 as To form partial areas of a vibration damper manufactured as an integral unit.
  • the exemplary embodiment from FIGS. 12, 13 is suitable for this purpose. If one considers the arrangement shown there in a top view, the vibration dampers 51 and 74 could be brought together in part above and below the damper support surface 50 integrated in the holding device 10 .
  • the vibration damper manufactured as an integral unit thus contains a slot at the height of the holding element 10. This vibration damper is then drawn onto the damper support surface 50 via one of the two side walls 12, 14. In position there, the vibration damper manufactured as an integral unit is functionally subdivided into a vibration damper 51 and 74 by the damper support surface 50.

Landscapes

  • Vibration Prevention Devices (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

L'invention concerne un boîtier (1) pour loger des modules électroniques et des organes entraînés par moteur, dans lequel sont fixés un ou plusieurs disques durs (20) ou autres, ou bien un ou plusieurs modules présentant respectivement un moteur d'entraînement. Outre les moyens de fixation appropriés, une surface porteuse amortissante (50), une surface de fixation amortissante (55), respectivement au moins un amortisseur de vibration (51) destiné à la surface porteuse et un amortisseur de vibration destiné à la surface de fixation sont prévus pour la fixation d'un disque dur (20). La surface porteuse amortissante (50) et la surface de fixation amortissante (55) sont associées à une face du disque dur (20) et à deux faces opposées d'une surface de support (3) appropriée. Un amortisseur de vibrations (51) destiné à la surface porteuse est situé entre la surface porteuse amortissante (50) et la surface de support (3) et porte au moins partiellement à plat, avec au moins respectivement une surface de contact, sur la surface porteuse amortissante (50) et la surface de support (3). Un amortisseur de vibration (74) destiné à la surface de fixation se trouve entre la surface de fixation amortissante (55) et la surface de support (3) et porte au moins partiellement à plat, avec au moins respectivement une surface de contact, sur la surface de fixation amortissante (55) et la surface de support (3).
PCT/EP1998/006669 1997-10-25 1998-10-21 Boitier pour loger des modules electroniques WO1999022554A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98958855A EP1048192A2 (fr) 1997-10-25 1998-10-21 Boitier pour loger des modules electroniques
AU14855/99A AU1485599A (en) 1997-10-25 1998-10-21 Housing for accommodating electronic assembly groups
US10/099,375 US6657858B2 (en) 1997-10-25 2002-03-14 Housing for data storage devices or for accommodating such devices

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19747210.9 1997-10-25
DE19747210 1997-10-25
DE19753342.6 1997-12-02
DE19753342 1997-12-02
DE19812479.1 1998-03-21
DE19812479A DE19812479C1 (de) 1997-10-25 1998-03-21 Gehäuse zur Aufnahme elektronischer Baugruppen

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US54225500A Continuation-In-Part 1997-10-25 2000-04-03

Publications (2)

Publication Number Publication Date
WO1999022554A2 true WO1999022554A2 (fr) 1999-05-06
WO1999022554A3 WO1999022554A3 (fr) 1999-07-22

Family

ID=27217858

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006669 WO1999022554A2 (fr) 1997-10-25 1998-10-21 Boitier pour loger des modules electroniques

Country Status (3)

Country Link
EP (1) EP1048192A2 (fr)
AU (1) AU1485599A (fr)
WO (1) WO1999022554A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200974A1 (de) * 2019-01-25 2020-07-30 Conti Temic Microelectronic Gmbh Gehäuse für ein Steuergerät und derartiges Steuergerät

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642715A (en) * 1984-11-01 1987-02-10 Miltope Corporation Environmental conditioning and safety system for disk-type mass memories
US4713714A (en) * 1985-11-26 1987-12-15 Motorola Computer Systems, Inc. Computer peripheral shock mount for limiting motion-induced errors
US4896777A (en) * 1988-04-06 1990-01-30 Digital Equipment Corporation Lock and shock mounted device for computer disk drive
US5209356A (en) * 1992-02-05 1993-05-11 Chaffee Thomas M Acoustic rack
WO1993024932A1 (fr) * 1992-06-03 1993-12-09 Anembo Limited Appareil d'amortissement de la transmission du bruit audible genere par une unite de disques
US5510954A (en) * 1994-05-20 1996-04-23 Silent Systems, Inc. Silent disk drive assembly
US5510955A (en) * 1993-01-04 1996-04-23 Samsung Electronics Co., Ltd. Cage in computer equipment for locking peripheral equipment therewithin using hooked lockpins

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642715A (en) * 1984-11-01 1987-02-10 Miltope Corporation Environmental conditioning and safety system for disk-type mass memories
US4713714A (en) * 1985-11-26 1987-12-15 Motorola Computer Systems, Inc. Computer peripheral shock mount for limiting motion-induced errors
US4896777A (en) * 1988-04-06 1990-01-30 Digital Equipment Corporation Lock and shock mounted device for computer disk drive
US5209356A (en) * 1992-02-05 1993-05-11 Chaffee Thomas M Acoustic rack
WO1993024932A1 (fr) * 1992-06-03 1993-12-09 Anembo Limited Appareil d'amortissement de la transmission du bruit audible genere par une unite de disques
US5510955A (en) * 1993-01-04 1996-04-23 Samsung Electronics Co., Ltd. Cage in computer equipment for locking peripheral equipment therewithin using hooked lockpins
US5510954A (en) * 1994-05-20 1996-04-23 Silent Systems, Inc. Silent disk drive assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200974A1 (de) * 2019-01-25 2020-07-30 Conti Temic Microelectronic Gmbh Gehäuse für ein Steuergerät und derartiges Steuergerät
DE102019200974B4 (de) * 2019-01-25 2020-11-12 Conti Temic Microelectronic Gmbh Gehäuse für ein Steuergerät und derartiges Steuergerät
US12082386B2 (en) 2019-01-25 2024-09-03 Conti Temic Microelectronic Gmbh Housing for a control device, and control device of such type

Also Published As

Publication number Publication date
WO1999022554A3 (fr) 1999-07-22
AU1485599A (en) 1999-05-17
EP1048192A2 (fr) 2000-11-02

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