FAN FOR GENERATING A COOLING AIR FLOW WITH AN ELASTIC DAMPING ELEMENT TO DAMPEN THE TRANSMISSION OF VIBRATIONS

Abstract

The invention relates to a fan (100) for generating a cooling air flow. The fan (100) has a fan wheel (101) which is rotatably held on a support body (102), and at least one securing component (103) is provided which has securing openings (114) for securing the fan (100) and which is connected to the support body (102). At least one elastic damping element (105) is provided for damping a transmission of vibrations which are produced or can be produced during a rotation of the fan wheel (101). According to the invention, the elastic damping element (105) is guided along a guide direction (104) which is formed between the support body (102) and the securing component (103). The elastic damping element (105) and the guide device (104) have a circumferential design. Alternatively, the elastic damping element is designed as a plug-in element which is plugged through through-openings of the support body and of the securing component, whereby the support body and the securing component are held in a mutually spaced manner.

Description

[0001] Description

[0002] FAN FOR GENERATING A COOLING AIR FLOW WITH AN ELASTIC DAMPING ELEMENT FOR DAMPING THE TRANSMISSION OF VIBRATIONS

[0003] The invention relates to a fan for generating a cooling air flow with the features of the preamble of patent claim 1.

[0004] Such a fan is known from EP 1 617 085 A1. Specifically, this document discloses an axial fan for cooling electrical and / or electronic components in a computer. The disclosed axial fan comprises a fan housing with an axially flow-through air guide frame in which a fan impeller is rotatably mounted. The fan housing has a square outline, with fastening openings in its four corner regions for fastening to a component to be cooled or to a housing containing the component to be cooled. Furthermore, at least one elastic damping element is integrated into the axial fan. This is arranged such that it acts between the fan impeller and the fastening means for fastening the axial fan and thus serves to dampen the transmission of vibrations generated during rotation of the fan impeller.

[0005] DE 20 2013 101 596 U1 describes a fan unit with an outer shell and an inner shell arranged within the outer shell. A fan wheel is arranged within the inner shell, with the inner shell being decoupled from the outer shell by a circumferential air gap between the inner shell and the outer shell. The inner shell is connected to the outer shell by several connecting elements, which are made of an elastomeric material and designed as suspension elements. This decouples the inner shell from the outer shell in terms of vibration.

[0006] DE 10 2019 214 087 A1 discloses a fan in which a stator is held on a stator holder by a locking connection acting in the axial direction. Furthermore, the stator holder is inserted into a wall ring via several locking connections, with the stator holder being held in the locked position by soft components under radial and axial preload. Because the soft components support the locking connections, vibrations do not lead to noisy collisions between the locking elements.

[0007] DE 102013 103 299 A1 describes a fan module in which a fan is housed in a housing. The fan is separated from the housing by vibration damper assemblies. The vibration damper assemblies are adapted to absorb vibration waves with different frequency ranges.

[0008] CN 2 480 899 Y describes a fan mounted on a motherboard via support columns. The four corners of the fan each have a through-hole through which a support column is attached at the upper end using a locking fastener. At the opposite end, the support columns are inserted through openings in the motherboard via a locking fastener and locked to the motherboard. Each support column has a support bolt over which a sleeve is pushed, against which a spring rests when installed.

[0009] CN 2 01 821 631 U describes a fan comprising a support body on which a fan impeller is rotatably mounted. A mounting component is inserted into a guide at each of the four corners of the support body and secured. The mounting components are used to plug the fan into openings in a computer case. The mounting components are made of a flexible material.

[0010] JP S63-190 599 U discloses a fan with a housing consisting of a first housing part and a second housing part. The first housing part is designed as a support body for a fan, wherein the fan can be mounted with a bolt in a hollow socket of the first housing part. The housing parts each have a drum-like part to which a flange-like part is formed. At the corners of the flange-like parts there are openings or protruding hollow pins for fastening the fan. The hollow pins are each held in an elastic ring body to dampen vibrations. If required, the housing parts can be pushed over one another with their drum-like parts so that the fan has a different thickness in the axial direction.According to further embodiments, it is also proposed to connect the flange-like part to the drum-like part via an elastic connecting element, wherein the flange-like part, the elastic connecting element, and the drum-like part are integrally connected to one another via two-component injection molding. It is also proposed to design the flange-like part as an elastic connecting element with rigid fastening openings in its corner regions.

[0011] WO 2022 / 007383 A1 discloses a fan with a support body for hanging in a fan frame designed for multiple fans. The fan frame has mounting openings for securing the fan frame in a hard disk enclosure. The support body is provided with openings at opposite corners through which elastic damping elements are inserted. Two opposing damping elements are each mounted on a steel cable passing through these openings.

[0012] CN 1 456 037 A describes a cooling device for an electronic component (CPU) arranged on a printed circuit board. A fan is mounted on top of an air duct. A radiator with a plurality of fins is arranged in the air duct. The radiator is higher than the height of the air duct, allowing the cooling airflow generated by the fan to enter and exit the air duct unhindered. Furthermore, the air duct is elastically mounted relative to the printed circuit board via spring elements.

[0013] US 2006 / 0045616 A1 describes a fan module with a fan impeller rotatably mounted on a support body. The support body has openings at its corners, through each of which a partially elastic fastening element is inserted. The support body can be attached to the fastening openings of a housing, in particular a computer housing, using the fastening elements.

[0014] US 8 043 049 B2 also discloses a fan in which a fan impeller is held on a support body. The support body has first damping components at its corners, which are inserted through openings in the support body. Furthermore, second, annular damping components are provided, which are connected to the support body at its end faces via a snap-in connection. The fan is mounted by placing the fan, together with the pre-assembled, first damping components, on fastening openings of a coupling element (e.g., a computer casing). The fan is then finally fixed in place by placing washers and inserting fastening mandrels into openings in the first damping components, which serve as fastening components, on the opposite side of the coupling element. This radially expands the damping components and creates a clamp fit between the first damping components and the support body.The second damping component rests on the coupling element.

[0015] Finally, DE 20 2008 014 846 U1 discloses a fan with vibration damping. It consists of a frame with four interconnected sides. The frame has a recess at each of the connecting points, to which a vibration damper with a mounting hole is attached.

[0016] The present invention is based on the object of providing a fan for generating a cooling air flow that is an alternative to the prior art and has an effective vibration decoupling between the support body for the fan wheel and the fastening component for fastening the fan.

[0017] The present object is achieved by a fan having the features of patent claim 1. Advantageous embodiments or further developments of the invention can be found in the dependent claims.

[0018] The invention is based on a fan for generating a cooling airflow. The fan can be used, for example, for cooling heat-generating components in a computer or the like. Other cooling applications are also conceivable. The fan is preferably a so-called axial fan. The fan has a fan impeller which is rotatably mounted on a support body. At least one fastening component is provided which has fastening openings. The fastening openings serve to fasten the fan to or in the electronic device. The fastening component is detachably connected to the support body. Furthermore, at least one elastic, preferably rubber-elastic damping element is provided for damping the transmission of vibrations which can be generated or are generated during rotation of the fan impeller.The elastic damping element is used in particular for vibration decoupling between the support body for the fan wheel and the fastening component.

[0019] The invention proposes that the elastic damping element be guided along a guide device formed between the support body and the fastening component. The elastic damping element prevents any contact between the support body and the fastening component, thus achieving effective vibration isolation between these components. Furthermore, the guide device ensures that the damping element is held securely and reliably.

[0020] The guide device can preferably be designed as a channel-like depression, particularly preferably as a groove. It is also conceivable for the guide device to be designed as a shoulder. The damping element is thus guided in this way so that it can be easily installed or removed. According to an alternative proposal according to the invention, the elastic damping element is designed as a plug-in element, which is inserted through through-openings in the support body and the fastening component. The damping element designed as a plug-in element keeps the support body and the fastening component at a distance from one another.

[0021] Each of the above-mentioned alternatives according to the invention provides a fan in which effective vibration isolation can be achieved between the support body for the fan wheel and the at least one fastening component. In addition to cost-effective production of the fan, the detachability of the damping element also allows for easy replacement of the damping element and thus cost-effective maintenance of the fan.

[0022] The elastic damping element and the guide device are designed to be circumferential. In other words, the elastic damping element and the guide device run around a central air passage area, which the fan forms in its assembled state (mounted state). In other words, the damping element and the guide device are circular, frame-shaped, or ring-shaped in outline. In this way, vibration decoupling between the support body and the mounting component can be achieved evenly around the entire circumference of the fan. This allows for optimized vibration decoupling.

[0023] It is also advantageous if the guide device for the elastic damping element is formed in the support body. This contributes to easier manufacturing of the fan as a whole. The support body, which is preferably made of plastic using an injection molding process, can thus be easily and cost-effectively manufactured together with the guide device, whereas the fastening component, which is preferably made of metal (e.g., aluminum or zinc), requires no further processing.

[0024] According to another, highly advantageous embodiment of the inventive concept, it is proposed that a circular, circumferential wall be formed through the support body, with (viewed radially) an outer side and an inner side. A guide device is formed on each end face of the circular, circumferential wall, along which an elastic damping element is guided. The end faces of the wall are covered by at least one fastening component. The guide device is preferably designed as a circumferential groove or as a circumferential shoulder.

[0025] Such a design contributes to a further improvement in cost-effective manufacturability and also to a particularly easy realization of vibration decoupling between the support body and the fastening components.

[0026] According to another refinement, it is further proposed that two fastening components be provided, each fastening component being flat or at least predominantly flat. Each fastening component also has a central through-opening surrounded by fastening openings.

[0027] Such a refinement contributes to easier manufacturing of the fan. With a flat design, the mounting components can also be manufactured as cost-effective stamped parts made of metal (e.g., aluminum). Furthermore, a flat, or at least predominantly flat, design contributes to the fan being able to be provided as a very compact pre-assembled unit.

[0028] Preferably, the mounting components are of identical design. This contributes to increasing the number of common parts for the fan and thus further reducing costs.

[0029] The fastening components can have a rectangular outline (preferably square). However, the outline of a fastening component can also be shaped differently, for example, round or oval.

[0030] The assembly of the fan can be further simplified by connecting the fastening components to one another via elastic connecting parts. In other words, the fastening components are held together in the axial direction of the fan by means of the connecting parts. Furthermore, such a refinement can contribute to better contact between the elastic damping elements and the support body on the one hand and the fastening component on the other, since the elastic connecting parts create an axial preload on the assembled components of the fan. If the fastening components are rectangular in outline, they can preferably be connected to one another at their corners via the elastic connecting parts.In a further embodiment of the inventive concept, it is advantageous if the fastening components are rectangular in outline and have edge recesses at the corners, which are designed such that the elastic connecting parts are flush with a remaining edge of the fastening components. This contributes to a reduction in the peripheral space required by the fan, which is advantageous given the already limited space available in computers or even laptops.

[0031] Furthermore, according to an alternative embodiment of the invention, it is very advantageous if the fastening components are held together at their corner regions by fastening means which are designed as two hollow screws and a threaded sleeve. The hollow screws protrude into fastening openings in the fastening components and are supported therein in the axial direction of the fan. The hollow screws protrude at their ends into a through-opening in the threaded sleeve and engage with an external thread in an internal thread of the threaded sleeve. Internal shoulders of the threaded sleeve define a minimum distance between the hollow screws in the axial direction of the fan. This ensures that even when the fastening means are screwed together as far as possible, no contact can occur between the fastening components and the supporting body of the fan.

[0032] According to a further embodiment of the invention, it is proposed that two fastening components are provided, each fastening component being designed in the manner of a half-frame in its outline, i.e., viewed in the axial direction of the fan. The fastening components are held together and, viewed in cross-section, each have a wall such that it forms one wall section pointing in the axial direction of the fan and two wall sections pointing in the radial direction of the fan. The wall of the fastening components surrounds the circular, circumferential wall of the support body from the outside. Furthermore, the circular, circumferential wall of the support body has at least one circumferential groove (preferably two circumferential grooves) on its outer side, in which a circumferential, elastic (preferably rubber-elastic) damping element is arranged.

[0033] In other words, the wall of the mounting components can have a U- or C-shaped cross-section. However, it is conceivable that the wall of the mounting components has a different cross-section, for example, an E-shaped or semicircular shape. These features can also contribute to facilitating the assembly of the fan while providing sufficient vibration isolation between the support body and the mounting components.

[0034] It can also be useful and serves to increase the number of common parts used if the fastening components are of the same design.

[0035] To enable the fastening components to be held together very easily and to allow tool-free disassembly for maintenance, it is also proposed that the fastening components be held together by a detachable connection. The detachable connection can be implemented, for example, via a circumferential, elastic (preferably rubber-elastic) band. The elastic band can also contribute to better radial contact between the damping elements and the fastening components or the support body.

[0036] It is also conceivable that the fastening components are held together by means of a clip or snap connection.

[0037] Another highly expedient development of the invention proposes that a circular circumferential wall with (seen radially) an outer side is formed by the support body. On the outer side there is at least one circumferential groove in which a circumferential damping element is arranged. In addition, there is a fastening component which forms a circular circumferential wall with (seen radially) an inner side and an outer side. In the inner side there is also at least one circumferential groove, wherein the groove of the support body and the groove of the fastening component overlap and thus form a common space in which a circumferential, elastic damping element is arranged between the fastening component and the support body.

[0038] Such a further development contributes to easy manufacture, easy assembly and effective vibration decoupling between the support body and the fastening component.

[0039] According to a further embodiment of the invention, it is conceivable for the fastening component to form a flange at each end of the circular wall, in which several fastening openings are arranged. The flange extends in the radial direction of the fan. This contributes to the problem-free mounting of the fan on a computer or the like.

[0040] Preferably, the flange is rectangular (particularly preferably square).

[0041] Another embodiment of the invention proposes that the support body be rectangular in outline (preferably square) and form a circular, circumferential inner wall. A guide device is adjacent to one end of the circular, circumferential inner wall. A circumferential, elastic damping element is arranged along the guide device, which can preferably be designed as a circumferential shoulder or as a circumferential groove. An outer wall of the support body (seen radially) is provided with at least one circumferential groove in which a circumferential, elastic damping element is located. The fastening component is also rectangular in outline (preferably square). The fastening component is provided with a wall that is L-shaped in cross-section. The L-shaped wall has a first L-leg oriented in the axial direction of the fan and a second L-leg oriented in the radial direction of the fan.The first L-leg encloses the outer wall of the support body and the second L-leg covers the groove of the support body containing the elastic damping element.

[0042] Finally, according to another advantageous embodiment of the invention, it is proposed that the fastening component has a circular, circumferential wall with (seen radially) an inner side and an outer side. At each end of the circular, circumferential wall, there is a flange running in the radial direction of the fan. The flange is provided with fastening openings at one end of the circular, circumferential wall and with through-openings at the other (i.e., axially opposite) end of the circular, circumferential wall. The support body also has a flange-like region provided with through-openings. The flange-like region of the support body is aligned with a flange of the fastening component in such a way that the through-openings of the support body are aligned with through-openings of the fastening component.The elastic damping element, designed as a plug-in element, is inserted through two aligned through-holes. The plug-in element, or in other words, the design of the plug-in element, axially spaced the support body and the fastening component from each other. This type of embodiment of the invention also contributes to a very simple fan design, its easy assembly, and effective decoupling between the support body for the fan impeller and the fastening component.

[0043] The flanges of the fastening component are preferably rectangular in outline (particularly preferably square). The flange-like region of the support body is also preferably rectangular in outline, particularly preferably square. In this case, the fastening or through-holes are arranged in the corner regions of the flange or the flange-like region, respectively.

[0044] According to a further development, it further contributes to a secure, spaced-apart holding of the support body from the fastening element if the damping element, designed as a plug-in element, has a plate-like base body from which a rotationally symmetrical extension extends in the axial direction of the fan. The extension has at least two radially outwardly directed, circumferential thickenings. The circumferential thickenings are spaced axially apart from one another and also axially apart from the plate-like base body.

[0045] In order to facilitate reversible yielding of the damping element designed as a plug-in element during assembly of the fan, in particular in the radial direction, it is also proposed that the damping element designed as a plug-in element has an axial through-opening.

[0046] Preferred embodiments of the invention are illustrated in the figures and are explained in more detail in the following description with reference to the figures. This also makes further features and advantages of the invention clear. Identical reference symbols, even in different figures, refer to identical, comparable or functionally identical components. Corresponding or comparable properties and advantages are achieved even if a repeated description or reference to them is not made. The figures are not, or at least not always, to scale. In some figures, proportions or distances may be exaggerated in order to emphasize features of an embodiment more clearly. If the term “and / or” is used in a list of two or more terms or objects, this can mean that any one of the listed terms or objects can be used on its own.It can also mean that any combination of two or more of the listed terms or objects can be used. Each is shown schematically.

[0047] Fig. 1 shows a fan in a perspective exploded view according to a first

[0048] Example,

[0049] Fig. 2 is a representation of the fan according to view II of Fig. 1, in the assembled state,

[0050] Fig. 3 is a sectional view of the fan according to section III of Fig. 2,

[0051] Fig. 3a is a sectional view of the fan comparable to section III in Fig. 2, but in a slightly modified embodiment,

[0052] Fig. 4 shows a fan in a perspective exploded view according to a second

[0053] Example,

[0054] Fig. 5 is a view of the fan according to view V of Fig. 4, in the assembled state,

[0055] Fig. 6 is a sectional view of the fan according to section VI in Fig. 5,

[0056] Fig. 7 is a perspective exploded view of the fan according to a third

[0057] embodiment,

[0058] Fig. 8 is a representation of the fan according to view VIII of Fig. 7, in the assembled state,

[0059] Fig. 9 is a sectional view of the fan according to section IX of Fig. 8,

[0060] Fig. 10 is an exploded perspective view of the fan according to a fourth embodiment,

[0061] Fig. 11 is a representation of the fan according to view XI of Fig. 10, in the assembled state,

[0062] Fig. 12 is a sectional view of the fan according to section XII of Fig. 11, Fig. 13 is a perspective exploded view of the fan according to a fifth embodiment,

[0063] Fig. 14 is a view of the fan according to view XIV of Fig. 13, in the assembled state,

[0064] Fig. 15 is a sectional view of the fan according to section XV in Fig. 14,

[0065] Fig. 16A shows an elastic damping element in a first perspective view,

[0066] Fig. 16B shows the elastic damping element in a second perspective view,

[0067] Fig. 16C is a side view of the elastic damping element according to view XVIc of Fig. 16D,

[0068] Fig. 16D is a view of the elastic damping element according to view XVId of Fig. 16C,

[0069] Fig. 16E is a sectional view of the elastic damping element according to section XVIe of Fig. 16D and

[0070] Fig. 17 is an exploded perspective view of the fan according to a sixth embodiment,

[0071] Fig. 18 is a view of the fan according to view XVIII of Fig. 17, in the assembled state,

[0072] Fig. 19 a sectional view of the fan according to section XiX from Fig. 18 and

[0073] Fig. 20 is an enlarged partial view of fastening means of the fan according to

[0074] Partial view XX from Fig. 19. Reference is first made to Figs. 1 to 3. This shows a fan 100 having a fan wheel 101, a support body 102, and two identical fastening components 103.

[0075] In the assembled state, the fan wheel 101 is mounted on an electric motor (not shown) for rotation about a hub 109. The hub 109 is integrally connected (i.e., by a material bond) to a preferably flat base part 110, which in turn is integrally connected via support arms 111 to a circular wall 106 of the support body 102. Viewed radially, the circular wall 106 forms an inner side 107 and an outer side 108.

[0076] A guide device 104, preferably designed as a circumferential groove 104, is provided on each end face of the circular wall 106. An elastic, preferably rubber-elastic, damping element 105 is arranged and guided in this groove 104. The elastic damping element 105 is ring-shaped and extends throughout the entire groove 104. The elastic damping element 105 is preferably made of a rubber-like material.

[0077] Deviating from the exemplary embodiment, it is also conceivable, for example, to design the guide device 104 as a circumferential shoulder. In this case, one of the side walls (the radially inner or the radially outer side wall) of the groove 104 can be omitted, while still ensuring adequate guidance of the damping element 105. Fig. 3a shows this minor modification in a fan 100a, in which a guide device 104a for the damping element 105 is formed by a circumferential shoulder with a radially inner side wall.

[0078] Each of the elastic damping elements 105 is covered by a fastening component 103. The fastening components 103 are each flat. They preferably have a rectangular, in particular square, outline with a central through-opening 103a and four corner regions 112. Each corner region 112 is provided with a fastening opening 114. Other contour shapes of the fastening components 103, for example, round or oval, are also conceivable.

[0079] The size of the circumferential groove 104 and the size of the elastic damping element 105 are coordinated such that each fastening component 103 only comes into contact with the elastic damping element 105, but not with the support body 102. The fastening components 103 are thus effectively decoupled from the support body 102 in terms of vibration.

[0080] Furthermore, four elastic connecting parts 115 are shown. The elastic connecting parts 115 serve to hold the fan 100 together in an axial direction A. The elastic connecting parts 115 can also preferably be made of a rubber-like material. The connecting parts 115 have end walls 118, viewed in the axial direction A. The end walls 118 have a circular outline and have two opposite corners 118a. Furthermore, the end walls 118 are integrally connected via a rear wall 117, which runs on its end wall 118 from one corner 118 to the other corner 118. Each end wall 118 is provided with a through-opening 119, which is arranged approximately centrally.

[0081] The diameter of the central through-opening 103a is such that the fan wheel 101 with fan blades 120 is completely exposed through the central through-opening 103a in the radial direction R of the fan 100 and thus, upon rotation of the fan wheel 101, an air flow can pass unhindered through the fan 100 in the axial direction A.

[0082] Furthermore, the corner regions 112 have recesses 113. The recesses 113 each extend approximately 90 degrees around a corner region 112 in the circumferential direction of the fastening component 103. The recesses 113 are set back from a remaining, circumferential edge 116 of the fastening component 103.

[0083] To hold the fan 100 together in the axial direction A, each elastic connecting part 115 is pushed with its end walls 118 over two axially adjacent corner regions 112.

[0084] Due to the elasticity of the elastic damping elements 105, the fastening components 103 are slightly pushed apart in the axial direction A, i.e. from the inside against the end walls 118.

[0085] To attach the fan 100 to a wall 10, for example, of an electronic device in the region of an opening 11, fastening means 12 are inserted through the through-openings 119 and thus also through the fastening openings 114. These fastening means serve, for example, to screw the fan 100 to the wall 10 and can preferably be designed as screws (indicated by dashed lines in Fig. 3). Overall, the fan 100 represents a fan that can be easily mounted on the wall of a computer or the like. The fan is designed to be very compact as a pre-assembled fan module and, thanks to effective vibration decoupling of the fastening components 103 from the support body 102, exhibits extremely smooth running and extremely low noise emissions during operation.At the same time, the fan 100 can be completely disassembled if necessary due to the design of the support body 102, the fastening components 103 and the damping elements 105 as separate (individual) components, so that defective components can be easily replaced.

[0086] The wall 10 can, for example, be the wall of a computer housing, the wall of another electronic device to be cooled or the wall of another component.

[0087] Fig. 2 clearly shows that, in the assembled state, the elastic connecting parts 115 are formed with their rear wall 117 flush with the edge 116 of the fastening components 103. In the assembled state, the fan 100 forms a central air passage area LD through which air can pass in the axial direction A. The elastic damping elements 105 extend around the air passage area LD, or in other words, frame it.

[0088] The support body 102 and the fan wheel 101 can preferably be manufactured in a plastic injection molding process and thus very cost-effectively.

[0089] The fastening components 103 can preferably be made of metal, particularly preferably aluminum. They can thus be manufactured very cost-effectively as stamped parts.

[0090] It should also be noted that when the fan wheel 101 rotates, the support body 102 acts as a resonator for the vibrations caused by the rotation of the fan wheel 101. However, the support body 102 can be made very narrow in the axial direction A, thus keeping the mass of the support body 102 low.

[0091] The fan blades 120 are spaced a short distance from the inner side 107 of the circular wall 106 in the radial direction R. When the fan wheel 101 rotates around the hub 109, free rotation of the fan wheel 101 is thus ensured. A second embodiment of a fan 200 will now be described with reference to Figs. 4 to 6.

[0092] The fan 200, as well as the fans described in the following embodiments, operate according to the same principle as the fan 100 already described. They are therefore all so-called axial fans.

[0093] The fan 200 also has a fan wheel 201, a support body 202 and two identical fastening components 203.

[0094] The fan wheel 201 rotates, driven by an electric motor (not shown), around a hub 209, which in turn is integrally connected to a preferably flat base part 210. The base part 210 is in turn integrally connected to a circular surrounding wall 206 via support arms 211.

[0095] Thus, in this case too, the support body 202 carrying the fan wheel 201 is formed from the hub 209, the base part 210, the support arms 211 and the circular wall 206.

[0096] The support body 202 and the fan wheel 201 are again preferably made of plastic and manufactured using the plastic injection molding process.

[0097] Furthermore, it can be seen that the circular circumferential wall 206 has guide devices on its end faces, preferably designed as circumferential grooves 204

[0098] 204, in which elastic, preferably rubber-elastic damping elements 205 are arranged and guided. The elastic damping elements

[0099] 205 are again annular and are formed circumferentially within the grooves 204. Deviating from the exemplary embodiment, the guide devices 204 can also be formed differently, for example, as circumferential shoulders.

[0100] The circular wall 206 has, viewed in the radial direction R, an inner side 207 and an outer side 208.

[0101] On the outer side 208, two guide devices 221 are provided, spaced apart in the axial direction A and preferably formed as circumferential grooves 221. An elastic, preferably rubber-elastic, damping element 205 is arranged in each of these grooves 221. The elastic damping elements 205 are all ring-shaped and preferably made of a rubber-like material.

[0102] Deviating from the exemplary embodiment, it is also conceivable that only one groove 221 or more than two grooves 221 with damping elements 205 are arranged on the outer side 208.

[0103] Each of the identically constructed fastening components 203 has the outline of a half-frame, i.e., one that is open on one side. In other words, each fastening component 203 has an arched outline with a semicircular recess 203a surrounded by an end wall 203b extending in the radial direction R of the fan 200.

[0104] An outer wall 222, seen in the radial direction R, has, in cross-section, an axial wall section 223 which runs in the axial direction A of the fan 200 and radial wall sections 224 adjoining it on both sides. The radial wall sections 224 run in the radial direction R of the fan 200.

[0105] As can be seen particularly from Fig. 5, the semicircular recesses 203a of the fastening components 203 complement each other in the assembled state of the fan 200 to form a circular opening, which in turn exposes the entire fan wheel 201 as seen in the radial direction R. The circular wall 206 of the support body 202 is completely enclosed by the fastening components 203. This occurs in such a way that each of the elastic damping elements 205 arranged in the grooves 221 touches the inner side of the axial wall section 223 of the fastening components 203 at four contact points B.

[0106] With regard to the end faces, the elastic damping elements 205 arranged in the grooves 204 are covered by the radial wall sections 224 and touch them.

[0107] Thus, in this embodiment, too, the elastic damping elements 205 enable effective vibrational decoupling of the fastening components 203 from the supporting body 202.

[0108] In this exemplary embodiment, the fastening components 203 are held together radially by a circumferential, elastic (preferably rubber-elastic) band 213. The circumferential, elastic band 213 is recessed into a circumferential recess 222a in the outer wall 222. The fastening components 203 are thus held together by a detachable connection. The detachable connection of the fastening components 203 can also be realized by a snap-in or clip connection.

[0109] Finally, it is shown that the fastening components 203 have corner regions 212 into which fastening openings 214 pointing in the axial direction A are introduced.

[0110] In the assembled state of the fan 200, the fastening components 203 together form a rectangular, in particular square, outline.

[0111] In the assembled state, the fan 200 also forms a central air passage area LD through which air can pass in the axial direction A. The elastic damping elements 205 run around the air passage area LD or, in other words, frame it.

[0112] A third embodiment of a fan 300 will now be described in more detail with reference to Figs. 7 to 9. Similar to the previous embodiments, the fan 300 again consists of a fan wheel 301, which is rotatably mounted within a support body 302. An electric motor required to drive the fan wheel 301 is again not shown.

[0113] The support body 302 has a hub 309, which is integrally connected to a preferably flat base part 310. The base part 310 is in turn integrally connected to a circular wall 306 via support arms 311.

[0114] The circular, circumferential wall 306, viewed radially, has an inner side 307 and an outer side 308. Two guide devices 321, preferably designed as circumferential grooves 321, are introduced into the outer side 308 at a distance in the axial direction A. Elastic, preferably rubber-elastic, damping elements 305 are arranged in the grooves 321. The elastic damping elements 305 are annular. Alternatively, it is also conceivable to introduce only one groove 321 or more than two grooves 321 with a damping element 305 into the wall 308.

[0115] Furthermore, a fastening component 303 is present. The fastening component 303 also has a circular, circumferential wall 325. Viewed radially, the circular, circumferential wall 325 has an inner side 326 and an outer side 328. Two circumferential grooves 327 are formed in the inner side 326. In the assembled state of the fan 300, the outer side 308 of the circular, circumferential wall 306 is enclosed by the inner side 326 of the circular, circumferential wall 325 of the fastening component 303. The circumferential grooves 321 in the support body 302 coincide with the circumferential grooves 327 in the fastening component 303. This forms a common, circumferential receiving space for the elastic damping elements 305. The size of the circumferential grooves 321 and 327 as well as the size of the elastic damping elements 305 are dimensioned such that the circumferential, elastic damping elements 305 in the radial direction R against the inside

[0116] 326 of the circular wall 325. The number of circumferential grooves

[0117] 327 depends on the number of circumferential grooves 321.

[0118] In this way, on the one hand, an effective vibration decoupling between the support body 302 and the fastening component 303 is realized, and on the other hand, a secure hold of the support body 302 in the fastening component 303 in the axial direction A is made possible.

[0119] The circular wall 325 of the fastening component 303 has a flange F extending in the radial direction R on each of its two end faces. The flange F is preferably rectangular in outline, in particular square, and has four corner regions 312. Each of the corner regions 312 is provided with a fastening opening 314. Deviating from this, other contour shapes of the flanges F are also conceivable.

[0120] In the assembled state, the fan 300 also forms a central air passage area LD through which air can pass in the axial direction A. The elastic damping elements 305 run around the air passage area LD or, in other words, frame it.

[0121] A fourth embodiment of a fan 400 is described in Figs. 10 to 12. Again, the fan 400 has a fan wheel 401, which is arranged to rotate around a hub 409. An electric motor for driving the fan wheel 401 is not shown. Such a motor would be arranged in an unspecified cavity between the hub 409 and the fan wheel 401.

[0122] The hub 409 is integrally connected to a preferably flat base part 410, which in turn is integrally connected via support arms 411 to a circular inner wall 407. This forms a support body 402 for the fan wheel 401. Furthermore, a fastening component 403 is also provided.

[0123] The support body 402 is preferably rectangular in outline, particularly preferably square. It has an outer wall 413. Viewed in the axial direction A, the outer wall 413 merges at its end face facing the fastening component 403 (see Fig. 10) into a cavity 408 extending in the radial direction R. The outer wall 413 and the cavities 408 form four corner regions 415 of the support body 402.

[0124] On the end face facing away from the fastening component 403, the cavities 408 are each covered by a front wall. In other words, the outer wall 413 there transitions into a wall extending in the radial direction R, in which a through opening 416 (indicated by dashed lines) is provided.

[0125] Furthermore, it can be seen that a guide device 404, preferably designed as a circumferential groove 404, is incorporated in the region of a front-end boundary edge of the circular inner wall 407. An elastic, preferably rubber-elastic, damping element 405 is received and guided in this groove 404. The elastic damping element 405 is annular. Deviating from the exemplary embodiment, the guide device 404 can also be designed, for example, as a circumferential shoulder.

[0126] Furthermore, at least one guide device 418 formed as a circumferential groove 418 is incorporated into the outer wall 413. A circumferential, elastic (preferably rubber-elastic) damping element 417 is arranged in the groove 418.

[0127] The fastening component 403 also preferably has a rectangular, particularly preferably square, outline, with an inner wall 422 and an outer wall 423, as seen in the radial direction R. On the inner wall 422, the fastening component 403 is provided with a circumferential groove 419.

[0128] The fastening component 403 has a wall which, in cross-section, consists of an L-leg 420 oriented in the axial direction A and an L-leg 421 angled therefrom and oriented in the radial direction R. In the assembled state of the fan 400, the outer wall 413 of the support body 402 is completely surrounded by the axially aligned L-leg 420 of the fastening component 403. The circumferential groove 419 in the fastening part 403 and the circumferential groove 418 in the support body 402 coincide in such a way that a common receiving space is formed for the elastic damping element 417. At the same time, the circumferential groove 404 with the elastic damping element 405 located therein is covered by the radially aligned L-leg 421 of the fastening component 403.

[0129] The dimensions of the grooves 418, 419, and 404 and the elastic damping elements 417 and 405 located therein are dimensioned such that the fastening component 403 is effectively decoupled from the support body 402 in terms of vibration. In other words, in this embodiment, the fastening component 403 does not come into direct contact with the support body 402 at any point.

[0130] Furthermore, it can be seen that a fastening opening 414 is provided in each of the corner regions 412 of the fastening component 403. When the fan 400 is assembled, the fastening openings 414 coincide with the through-openings 416. Thus, a suitable fastening element (e.g., a screw) can be easily inserted through the fastening and through-openings 414 and 416, and the fan 400 can be screwed to the wall of another component (not shown in detail).

[0131] In the assembled state, the fan 400 also forms a central air passage area LD through which air can pass in the axial direction A. The elastic damping elements 405 and 417 run around the air passage area LD or, in other words, frame it.

[0132] Figs. 13 to 15 show a further embodiment of a fan 500. The fan 500 has, in a manner analogous to the previous examples, a fan wheel 501 which is rotatably mounted on a support body 502.

[0133] A fastening component 503 surrounding the fan wheel 501 serves to fasten the fan 500 to another component not shown in detail.

[0134] As can be seen, the fan wheel 501 is arranged rotatably around a hub 509, which is integrally connected to a preferably flat base part 510. The base part 510 is in turn integrally connected to a flange-like body F1 via support arms 511. The flange-like body F1 is frame-like and flat. It preferably has a rectangular, particularly preferably square, outline and forms four corner regions 515 around a central through-opening 504. Each of the corner regions has a through-opening 517.

[0135] The fastening component 503 has a circular circumferential wall 525 with an inner wall 526 and an outer wall 528, viewed in the radial direction R.

[0136] A flange F extending in the radial direction R is formed on each end face of the circular wall 525. Each flange F preferably also has a rectangular, in particular square, outline and forms four corner regions 512.

[0137] Deviating from the embodiment, it is also conceivable that the flange-like body F1 and / or the flanges F have other outline shapes, for example round or oval.

[0138] In the flange F, which faces the flange-like body F1, a through-opening 516 is provided in the corner region 512. The through-openings 516 of the fastening component 503 and the through-openings 517 of the support body 502 have the same diameter or at least approximately the same diameter.

[0139] In the assembled state, an elastic damping element 522 is inserted through each of the aligned through-openings 516 and 517. The elastic damping element 522 is designed as a plug-in element. In particular, it is designed such that, in the assembled state of the fan 500, the flange-like body F1 is held at a specific axial distance a from the adjacent flange F of the fastening component 503.

[0140] In this way, an effective vibration-technical coupling of the support body 502 from the fastening component 503 is possible.

[0141] Furthermore, fastening openings 514 are provided in the corner regions 512 of the other flange F of the fastening component 503, which faces away from the support body 502. Suitable fastening means can be inserted through the fastening openings 514, and the fastening component 503 can be attached to a device housing (not shown in detail). The diameter of the fastening openings 514 is preferably smaller than that of the through-holes 516 and 517.

[0142] In the assembled state, the fan 500 forms a central air passage area LD through which air can pass in the axial direction A.

[0143] Finally, the elastic damping element 522 will be described with reference to Figs. 16A to 16E.

[0144] The elastic damping element 522 has a plate- or disc-like base body 529. A rotationally symmetrical extension 530 extends from the plate-like base body 529 in the axial direction A. The extension 530 has two circumferential thickenings 531. The circumferential thickenings 531 are oriented outward in the radial direction R. They are spaced a1 apart from one another in the axial direction A. The first circumferential thickening 531 is spaced a2 apart from the plate-like base body 529 in the axial direction A. The distances a1 and a2 can be equal or different. This depends on the selected material thicknesses of the flange F on the one hand and the flange-like body F1 on the other.

[0145] Furthermore, it can be seen in the figures that the plate-like base body 529 (deviating from a circular outline indicated by dashed lines) forms two opposite corner regions 533 in outline.

[0146] In the assembled state, the plate-like base body 529 protrudes into a recess 523 of the flange-like body F1, wherein the recess 523 has the same outline as the plate-like base body 529. In this way, an unintentional rotation of the elastic damping element 522 in the flange-like body F1 can be prevented. On the side opposite the recess 523, the elastic damping element 522 is supported by the first circumferential thickening 531 against an edge region of the through-opening 517, overlapping the latter. The aforementioned distance a2 between the circumferential thickening 531 and the plate-like base body 529 is filled by the remaining material of the flange-like body F1. The described distance a1 between the circumferential thickenings 531 serves to accommodate the flange F of the fastening component 503 in the region of the through-opening 516.Thus, a width b of the first, circumferential thickening 531 (see Fig. 16E) also defines the distance a (see Fig. 15) by which the support body 502 and the fastening component 503 are axially spaced from one another. Finally, an axial through-opening 532 in the elastic damping element 522 should be mentioned, which facilitates deformation of the elastic damping element 522 when it is inserted through the through-openings 516, 517, particularly in the radial direction R.

[0147] A final embodiment of a fan 600 will now be described with reference to Figs. 17 to 20.

[0148] In the assembled state, the fan wheel 601 is mounted on an electric motor (not shown) for rotation about a hub 609. The hub 609 is integrally connected (i.e., materially bonded) to a preferably flat base part 610, which in turn is integrally connected via support arms 611 to a circular wall 606 of the support body 602. Viewed radially, the circular wall 606 forms an inner side 607 and an outer side 608.

[0149] A guide device 604, preferably designed as a circumferential groove 604, is provided on each end face of the circular wall 606. An elastic, preferably rubber-elastic, damping element 605 is arranged and guided in this groove 604. The elastic damping element 605 is ring-shaped and extends throughout the entire groove 604. The elastic damping element 605 is preferably made of a rubber-like material.

[0150] Deviating from the exemplary embodiment, it is also conceivable, for example, to design the guide device 604 as a circumferential shoulder. In this case, one of the side walls (the radially inner or the radially outer side wall) of the groove 604 can be omitted, while still ensuring sufficient guidance of the damping element 605. Other contour shapes of the fastening components 603, for example, round or oval, are also conceivable.

[0151] Each of the elastic damping elements 605 is covered by a fastening component 603. The fastening components 603 are each flat or at least predominantly flat. They preferably have a rectangular, in particular square, outline with a central through-opening 603a and four corner regions 612. Each corner region 612 is provided with a fastening opening 614. Each corner region 612 is preferably formed as a thickened portion increasing toward the edge of the fastening component 603. In the assembled state of the fan 600, the thickened portions of the corner regions 612 of the opposing fastening components 306 point toward one another in the axial direction A of the fan 600. This contributes to a compact design of the fan 600.

[0152] Two fastening means 615 and one fastening means 616 are provided at each corner region 612 to hold the fan 600 together in the axial direction A. Fasteners 615 are preferably hollow screws, and fasteners 616 are preferably threaded sleeves. Fasteners 615 and 616 are preferably made of a metal, for example, brass. Fastening components 603 can also preferably be made of a metal, for example, zinc. Support body 602 is preferably a plastic injection-molded part.

[0153] During assembly of the fan 600, the fastening means 615 engage on the front side in a through-hole of the fastening means 616 and engage with an external thread 615a in an internal thread 616a of the fastening means 616. A circumferential bevel 615b of the fastening means 615 overlaps a corresponding bevel in the fastening openings 614 and is supported thereon. The fastening means 615 can be rotated with a suitable tool via an internal polygon 615e. Due to the elasticity of the elastic damping elements 605, the fastening components 603 are slightly pushed apart in the axial direction A, i.e., pressed from the inside against the bevels 615b. Internal shoulders 616b of the fastening means 616 advantageously define a minimum distance between the fastening means 615 from one another in the axial direction A.This ensures that even if the fastening means 615, 616 are screwed together as far as possible, no contact can occur between the fastening components 603 and the support body 602 (see in particular Fig. 20).

[0154] To fasten the preassembled fan 600 to a wall 10, for example, of an electronic device in the region of an opening 11, additional fastening means 12 are inserted through a through-opening 615d formed by the screwed-together fastening means 615 and 616. These can be used, for example, to screw the fan 600 to the wall 10. The fastening means 12 can be designed, for example, as countersunk screws (indicated by dashed lines in Fig. 19).

[0155] The wall 10 can be, for example, the wall of a computer case, the wall of another electronic device to be cooled, or even the wall of another component. In the assembled state, the fan 600 forms a central air passage area LD through which air can pass in the axial direction A. The elastic damping elements 605 extend around the air passage area LD, or in other words, frame it.

[0156] Overall, the fan 600 represents a fan that can be easily mounted on the wall of a computer or similar device. The fan is designed as a very compact preassembled fan module and, thanks to the effective vibration decoupling of the mounting components 603 from the support body 602, exhibits extremely smooth operation and extremely low noise emissions. At the same time, the fan 600 can be manufactured cost-effectively and completely disassembled if necessary, allowing for easy replacement of defective components, thanks to the design of the support body 602, the mounting components 603, and the damping elements 605.

[0157] List of reference symbols

[0158] Wall of an electronic device

[0159] opening

[0160] Fasteners

[0161] fan

[0162] fan wheel

[0163] Support body

[0164] Fastening component a central through opening

[0165] Guide device, groove a Guide device, circumferential shoulder elastic damping element circular circumferential wall

[0166] Inside of the circular wall Outside of the circular wall Hub

[0167] Base part

[0168] Support arms

[0169] Corner areas

[0170] recesses

[0171] Mounting holes elastic connecting parts edge

[0172] back wall

[0173] End walls and corners

[0174] Through openings

[0175] Fan blades

[0176] fan

[0177] fan wheel

[0178] Support body

[0179] Fastening component a semicircular recess b end wall

[0180] Guide devices, grooves, elastic damping elements, circular wall

[0181] Inside of the circular wall

[0182] Outside of the circular wall hub

[0183] Base part

[0184] Support arms

[0185] Corner areas with elastic band

[0186] Mounting holes

[0187] Guide devices, grooves

[0188] Outer wall a circumferential recess axial wall section radial wall section

[0189] fan

[0190] fan wheel

[0191] Support body

[0192] Fastening component

[0193] Guide devices, grooves, elastic damping elements, circular wall

[0194] Inside of the circular wall

[0195] Outside of the circular wall hub

[0196] Base part

[0197] Support arms

[0198] Corner areas

[0199] Mounting holes

[0200] Guide devices, grooves in the support body, circular wall

[0201] inside

[0202] Guide devices, grooves in the fastening component outside

[0203] Fan Fan wheel Supporting body Fastening component Guide device, groove Elastic damping element Circular inner wall Cavity Hub Base part

[0204] Support arms Corner areas Outer wall Mounting holes Corner areas

[0205] Through holes elastic damping element guide device, groove in the support body guide device, groove in the fastening component axially aligned L-leg radially aligned L-leg inner wall outer wall

[0206] Fan Fan wheel Support body Fastening component Central through hole Hub Base part

[0207] Support arms Corner areas Mounting openings Corner areas

[0208] Through-holes Through-holes elastic damping element 23 recess 25 circular circumferential wall 26 inner wall 28 outer wall 29 plate-like base body 30 rotationally symmetrical extension 31 circumferential thickenings 32 axial through-hole

[0209] 533 Corner areas 00 Fan 01 Fan wheel 02 Support body

[0210] 603 Fastening component

[0211] 603a central passage opening

[0212] 604 Guide device, groove

[0213] 605 elastic damping element

[0214] 606 circular wall

[0215] 607 Inside of the circular wall

[0216] 608 Outside of the circular wall

[0217] 609 Hub

[0218] 610 base part

[0219] 611 support arms

[0220] 612 corner areas

[0221] 614 mounting holes

[0222] 615 Fasteners, hollow screws

[0223] 615a external thread

[0224] 615b circumferential bevel

[0225] 615c contact surface

[0226] 615d passage opening

[0227] 615e polygon socket

[0228] 616 Fasteners, threaded sleeve

[0229] 616a internal thread

[0230] 616b inside heel

[0231] 620 fan blades

[0232] A Axial direction B Contact points b Width a, a1, a2 Distances

[0233] F flange

[0234] F1 flange-like area

[0235] LD central air passage area

[0236] R Radial direction

Claims

Claims: A fan (100, 200, 300, 400, 500, 600) for generating a cooling airflow, comprising a fan wheel (101, 201, 301, 401, 501, 601) rotatably mounted on a support body (102, 202, 302, 402, 502, 602) and with at least one fastening component (103, 203, 303, 403, 503, 603) having fastening openings (114, 214, 314, 414, 514, 614) for fastening the fan (100, 200, 300, 400, 500, 600) and connected to the support body (102, 202, 302, 402, 502, 602) is connected, wherein at least one elastic damping element (105, 205, 305, 405, 417, 522, 605) is provided for damping the transmission of vibrations that can be generated or are generated during rotation of the fan wheel (101, 201, 301, 401, 501, 601), characterized in that the elastic damping element (105, 205, 305, 405, 417, 605) is guided along a guide device (104, 204, 221, 321, 327, 404, 418, 419, 604) which is connected between the support body (102, 202, 302, 402,602) and the fastening component (103, 203, 303, 403, 603), wherein the elastic damping element (105, 205, 305, 405, 417, 605) and the guide device (104, 204, 221, 321, 327, 404, 418, 419, 604) are formed circumferentially or characterized in that the elastic damping element (522) is designed as a plug-in element which is inserted through through openings (516, 517) of the support body (502) and the fastening component (503), whereby the support body (502) and the fastening component (503) are held at a distance (a) from each other. A fan (100, 200, 300, 400, 600) according to claim 1, characterized in that the guide device (104, 204, 221, 321, 404, 418, 604) is formed in the support body (102, 202, 302, 402, 602). A fan (100, 200, 600) according to claim 2, characterized in that the support body (102, 202, 602) has a circularly circumferential wall (106, 206, 606) with an outer surface (108, 208,608) and an inner surface (107, 207, 607), wherein a guide device (104, 204, 604) is formed on each end face of the wall (106, 206, 606), along which an elastic damping element (105, 205, 605) is guided, wherein the end faces of the wall (106, 206, 606) are covered by at least one fastening component (103, 203, 603). A fan (100, 600) according to claim 3, characterized in that two mounting components (103, 603) are provided, each mounting component (103, 603) being flat and having a central through-opening (103a, 603a) surrounded by mounting openings (114, 614). A fan (100) according to claim 4, characterized in that the mounting components (103) are connected to each other via elastic connecting elements (115).A fan (600) according to one of claims 1 to 4, characterized in that the fastening components (603) are held together at their corner regions by fastening means (615, 616) which are designed as two hollow screws (615) and a threaded sleeve (616), wherein the hollow screws (615) project into fastening openings (614) of the fastening components (603) and are supported therein in the axial direction (A), wherein the hollow screws (615) project into a through-opening of the threaded sleeve (616) at their end face and engage with an external thread (615a) in an internal thread (616a) of the threaded sleeve (616), wherein a minimum distance between the hollow screws (615) is defined by internal shoulders (616b) of the threaded sleeve (616) in the axial direction (A).Fan (100) according to claim 5, characterized in that the fastening components (103) are rectangular in outline and have edge recesses (113) at corner areas (112) which are designed such that the elastic connecting parts (115) are flush with the edge of a remaining edge (116) of the fastening components (103).Fan (200) according to claim 3, characterized in that two fastening components (203) are provided, each fastening component (203) being designed in the form of a half-frame, the fastening components (203) being held together and each having, in cross-section, a wall (222) forming a wall section (223) pointing in an axial direction (A) and two wall sections (224) pointing in a radial direction (R), the wall (222) of the fastening components (203) surrounding the circularly circumferential wall (206) of the support body (202) from the outside, and the wall (206) of the support body (202) having at least one circumferential groove (221) on its outer side (208) in which a circumferential elastic damping element (205) is arranged. Fan (200) according to claim 8, characterized in that the fastening components (203) are held together by a detachable connection. A fan (300) according to claim 3, characterized in that the support body (302) forms a circularly circumferential wall (306) with an outer surface (308), wherein at least one circumferential groove (321) is provided on the outer surface (308) in which a circumferential damping element (305) is arranged, wherein a fastening component (303) is provided which forms a circularly circumferential wall (325) with an inner surface (326) and an outer surface (328), wherein at least one circumferential groove (327) is also formed in the inner surface (326), wherein the groove (321) of the support body (302) and the groove (327) of the fastening component (303) overlap and thus form a common space in which the circumferential,An elastic damping element (305) is arranged between the mounting component (303) and the support body (302). A fan (300) according to claim 10, characterized in that the mounting component (303) forms a flange (F) at each end face of the circularly circumferential wall (325), in which several mounting openings (314) are arranged, the flange (F) extending in the radial direction of the fan (300). Fan (400) according to claim 2, characterized in that the support body (402) has a rectangular outline and forms a circular inner wall (407), wherein a guide device (404) adjoins an end face of the circular inner wall (407), along which a circumferential elastic damping element (405) is guided, and wherein an outer wall (413) of the support body (402) is provided with at least one circumferential groove (418) in which a circumferentialelastic damping element (417) is located, wherein the fastening component (403) has a rectangular outline and an L-shaped wall in cross-section, which has a first L-leg (420) oriented in the axial direction (A) and a second L-leg (421) oriented in the radial direction (R), wherein the first L-leg (420) encloses the outer wall (413) of the support body (402) and the second L-leg (421) covers the guide device (404) of the support body (402) for the elastic damping element (405). Fan (500) according to claim 1, characterized in that the mounting component (503) has a circularly circumferential wall (525) with an inner side (526) and an outer side (528), wherein a radially extending flange (F) with mounting openings (514) at one end and with through openings (516) at the other end is formed at the end faces of the circularly circumferential wall (525), wherein the support body (502) also has a flange-like area (F1) which is provided with through openings (517), wherein the flange-like area (F1) of the support body (502) is brought into alignment with a flange (F) of the mounting component (503) such that the through openings (517) of the support body (502) coincide with the through openings (516) of the mounting component. (503) are brought into alignment, with two overlapping through-holes (516,517) the elastic damping element (522), designed as a plug-in element, is inserted through which the support body (502) and the fastening component (503) are axially spaced apart from each other. Fan (500) according to claim 1 or 13, characterized in that the damping element (522), designed as a plug-in element, has a plate-like base body (529) from which a rotationally symmetrical extension (530) extends in the axial direction (A), wherein the extension (530) has at least two radially outwardly directed circumferential thickenings (531) which have an axial distance (a1) from each other and also an axial distance (a2, a3) from the plate-like base body (529). Fan (500) according to claim 14, characterized in that the damping element (522), designed as a plug-in element, has an axial through-opening (532).