Blower motor for vehicle

Abstract

A blower motor for a vehicle according to an embodiment of the present invention may comprise: a stator module (220) and a rotor module (230) including a shaft (234); a lower housing (210) in which the rotor module (230) and the stator module (220) are mounted; a bearing (231) interposed between the shaft (234) and the lower housing (210), the shaft (234) being inserted in and extending through the bearing; and a first damper (510) integrally coupled to the lower housing (210), wherein the first damper (510) is formed to surround the periphery of the first bearing (231) without being in direct contact with the first bearing (231), and is thus configured to lower the natural frequency of the lower housing (210) and simultaneously block vibration transmitted from the first bearing (231) to the lower housing (210) from being transmitted along the lower housing (210) to the outside in the radial direction of the lower housing (210).

Description

Automotive blower motor

[0001] The present invention relates to a blower motor for a vehicle, and more specifically, to a blower motor capable of more reliably damping vibrations generated from a blower motor.

[0002] A vehicle's air conditioning system may include a heater to warm the vehicle's interior or an air conditioner to cool the interior. When the air conditioner or heater is operating, the air conditioning system operates by blowing cooled or heated air into the vehicle's interior. This blowing may be accomplished via a blower motor.

[0003] Typically, a blower motor draws in outside air and delivers it to the vehicle's interior, thereby creating ventilation. This intake of outside air can be accomplished by driving the blower motor to rotate a fan.

[0004] Blower motors generate vibration and noise due to the nature of the motor, and if these vibrations and noises are not attenuated or blocked, they can be transmitted to the vehicle body.

[0005] In the case of a conventional blower motor (e.g., patent document 1 below), a damper is interposed between a flange (for mounting the blower motor by connecting it to the vehicle body) and the blower motor, so that vibration or noise generated from the blower motor is attenuated or blocked from being transmitted to the vehicle body.

[0006] However, these dampers had the problem of being insufficient in solving the vibration and noise problems generated from the blower motor.

[0007] The present invention has been devised to solve the problems of the above-described prior art, and its purpose is to provide a blower motor that can more reliably attenuate vibrations generated from a blower motor with a simple structure.

[0008] A blower motor for a vehicle according to one embodiment of the present invention includes a rotor module (230) and a stator module (220) including a shaft (234), a lower housing (210) in which the rotor module (230) and the stator module (220) are mounted, a first bearing (231) interposed between the shaft (234) and the lower housing (210) and into which the shaft (234) is inserted and extends through, and a first damper (510) integrally coupled to the lower housing (210), wherein the first damper (510) is formed to surround the first bearing (231) without directly contacting the first bearing (231), thereby lowering the natural frequency of the lower housing (210) and at the same time, transmitting vibration from the first bearing (231) to the lower housing (210). It can be configured to block transmission along the lower housing (210) radially outward of the housing (210).

[0009] According to one embodiment of the present invention, the lower housing (210) includes a first region (420) including a central protrusion (213) for seating the first bearing (231), and a second region (440) disposed radially outwardly from the first region (420) of the lower housing (210), and the first region (420) and the second region (440) are connected by a plurality of connecting portions (460, 480) that are spaced apart from each other in a circumferential direction along an outer periphery of the first region (420) and extend radially outwardly, and the first damper (510) can be disposed in a spaced-off space between the first region (420) and the second region (440).

[0010] Additionally, the first damper (510) may have a ring shape concentric with the rotation axis (C) of the first bearing (231).

[0011] According to one embodiment of the present invention, the connecting portion (460, 480) includes a plurality of first connecting portions (460) spaced apart from each other along the outer periphery of the first region (420) and a plurality of second connecting portions (480) spaced apart from each other along the outer periphery of the first region (420), and the plurality of first connecting portions (460) and the plurality of second connecting portions (480) are spaced apart from each other in the axial direction, and when the lower housing (210) is viewed from above, the plurality of first connecting portions (460) and the plurality of second connecting portions (480) may be configured so as not to overlap each other.

[0012] A vehicle blower motor according to one embodiment of the present invention may further include a ring-shaped housing damper (212) arranged to cover the edge of the lower housing (210) along the circumferential direction.

[0013] A vehicle blower motor according to one embodiment of the present invention further includes a second damper (530) disposed on the lower housing (210) between the first damper (510) and the housing damper (212), and the second damper (530) may be configured to be integrally coupled with the lower housing (210) to lower the natural frequency of the lower housing (210) and at the same time block vibration transmitted to the lower housing (210) from being transmitted along the lower housing (210) to the radially outer side of the lower housing (210).

[0014] Additionally, the second damper (530) may be composed of a plurality of circular arc-shaped plates concentric with the rotation axis (C) of the first bearing (231).

[0015] A vehicle blower motor according to one embodiment of the present invention further includes an upper housing (240) configured to surround the stator module (220) and connected to a lower housing (210) through a fastening member, and a third damper (550) disposed around the fastening member, wherein the third damper (550) is integrally connected to the lower housing (210) to lower the natural frequency of the lower housing (210) and block vibration transmitted to the lower housing (210) through the fastening member from being transmitted along the lower housing (210).

[0016] Additionally, the third damper (550) is provided as a pair and can be placed on both sides of the fastener.

[0017] A vehicle blower motor according to one embodiment of the present invention further includes an upper housing (240) configured to surround the stator module (220) and fastened to a lower housing (210) through a fastening member, and a fourth damper (570) interposed between the upper housing (240) and the lower housing (210), wherein the fourth damper (570) is integrally coupled with the lower housing (210) to lower the natural frequency of the lower housing (210) and at the same time block vibration from being transmitted from the upper housing (240) to the lower housing (210).

[0018] In addition, on the upper surface of the lower housing (210), mounting columns (216) are formed and arranged to be spaced apart from each other along the circumferential direction with the rotation axis (C) of the first bearing (231) as the concentric axis, and the fourth damper (570) can be interposed between the upper housing (240) and the mounting columns (216).

[0019] According to one embodiment of the present invention, the above-described damper can be formed by insert molding.

[0020] According to one embodiment of the present invention, in addition to the housing damper, one or more of the first damper to the fourth damper is integrally coupled to the lower housing, so that not only can the natural frequency of the lower housing be further lowered, but also the first damper to the fourth damper are configured in consideration of the vibration sources transmitting vibration to the lower housing and the corresponding movement path of the vibration on the lower housing, so that the vibration on the lower housing can be more effectively damped or blocked.

[0021] In addition, according to one embodiment of the present invention, the housing damper, the first damper to the fourth damper are configured in a structure that can be molded by insert molding, so there is an advantage in that the dampers can be manufactured more easily and quickly.

[0022] In addition, according to one embodiment of the present invention, the housing damper is configured to surround the entire edge of the lower housing, so that the space where the rotor module, etc. is mounted and the space where the PCB board is mounted are physically separated based on the lower housing, so that the space where the PCB board is mounted can be sealed by the housing damper.

[0023] FIG. 1 is a perspective view of a motor module according to one embodiment of the present invention.

[0024] Figure 2 is an exploded perspective view of the motor module illustrated in Figure 1.

[0025] FIG. 3 is a drawing for explaining a housing damper coupled to the lower housing illustrated in FIG. 2.

[0026] Figure 4 is a cross-sectional view of a lower housing according to one embodiment of the present invention.

[0027] FIG. 5 is a drawing showing the lower housing portion where the first damper is coupled, taken from a different angle with the first damper removed from FIG. 4.

[0028] FIG. 6 is a drawing showing only the first damper with the lower housing removed to explain the structure and arrangement of the first damper.

[0029] Figure 7 is a rear view of the lower housing with dampers coupled thereto according to one embodiment of the present invention.

[0030] Figure 8 is a drawing showing only the second damper with the lower housing removed to explain the structure and arrangement of the second damper.

[0031] Figure 9 is a drawing showing only the third damper with the lower housing removed.

[0032] Fig. 10 is a cross-sectional view of a motor module according to one embodiment of the present invention.

[0033] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0034] When an element is referred to as "on" or "on" another element, it includes not only the element directly on the other element, but also any intervening elements. Conversely, when an element is referred to as "directly on" or "directly on", it indicates that there are no intervening elements. "And / or" includes each and every combination of one or more of the mentioned items.

[0035] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to readily describe the relationship of one component to another, as illustrated in the drawings. Spatially relative terms should be understood to include different orientations of the element during use or operation in addition to the orientations illustrated in the drawings. Like reference numerals refer to like components throughout the specification.

[0036] Although terms like "first," "second," etc. are used to describe various components and / or sections, these components and / or sections are not limited by these terms. These terms are merely used to distinguish one component or section from another. Accordingly, it should be understood that a "first component" or "first section" referred to below may also be a "second component" or "second section" within the technical scope of the present invention.

[0037] In this specification, “axial” should be understood to mean the axial direction of the rotational axis of the first bearing. In addition, “radially outward” in this specification should be understood to mean radially outward from the center of the rotational axis of the first bearing.

[0038] The embodiments described herein will be described with reference to plan views and cross-sectional views, which are ideal schematic drawings of the present invention. Therefore, the shapes of the illustrated drawings may vary depending on manufacturing techniques and / or tolerances. Therefore, the embodiments of the present invention are not limited to the specific shapes illustrated, but also encompass variations in shape resulting from the manufacturing process. Accordingly, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific shapes of the regions of the configuration and are not intended to limit the scope of the invention.

[0039] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0040] A blower motor according to one embodiment of the present invention may be configured to include at least a motor module (200) and a flange (not shown) on which the motor module (200) is mounted and connected to a vehicle body.

[0041] Fig. 1 is a perspective view of a motor module according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of the motor module illustrated in Fig. 1.

[0042] The motor module (200) is a module that receives electrical energy and drives a motor (more specifically, a rotor) to rotate a cooling wheel (not shown) to generate air flow.

[0043] Referring to FIGS. 1 and 2, a motor module (200) according to one embodiment of the present invention may include a lower housing (210), a stator module (220), a rotor module (230), and an upper housing (240).

[0044] First, the rotor module (230) includes a shaft (234), a rotor (232) press-fitted and fixed to the shaft (234), a first bearing (231) press-fitted and fixed to the shaft (234) to form an axial center and perform the function of reducing rotational resistance, and a second bearing (233).

[0045] The rotor (232) may be formed in a cylindrical shape and may be implemented with a structure in which multiple magnets are inserted inside. For example, the magnets may be permanent magnets with a rectangular structure and have the function of generating magnetic flux.

[0046] Next, the stator module (220), which is one of the components of the motor module (200), is a module for electromagnetically rotating the rotor (232), and may include, for example, a stator core (223), an insulator (224), a coil (225), and a stator phase terminal (not shown).

[0047] The stator core (223) may be formed into a hollow cylindrical shape so that a rotor (232) can be placed therein, and has a structure in which a coil (225) can be wound. The insulator (224) is a structure for electrical insulation between the stator core (223) and the coil (225) and for connecting the stator core (223) and the stator phase terminal.

[0048] The coil (225) is electrically connected to a PCB board (not shown) through a stator phase terminal, through which electricity flows through the coil (225), and the coil (225) is wound around the stator core (223) to electromagnetically rotate the rotor (232).

[0049] Next, the lower housing (210) is a component that covers the lower portion of the rotor module (230) and the stator module (220), and the upper housing (240) is a component that covers the upper portion of the rotor module (230) and the stator module (220).

[0050] Additionally, an elastic body (260) may be provided to pressurize the rotor module (230) in the axial direction to eliminate play between the rotor module (230) and the lower housing (210) or the upper housing (240).

[0051] According to one embodiment of the present invention, the motor module (200) can be assembled by placing the rotor module (230) and the stator module (220) on the lower housing (210) and finally connecting the upper housing (240) to the lower housing (210).

[0052] As illustrated in FIG. 3, a rib (600) may be additionally formed on the upper surface of the lower housing (210) to reinforce the rigidity of the lower housing. As an example, such a rib (600) may be formed in an area of ​​the upper surface of the lower housing (210) partitioned by a mounting pillar (216).

[0053]

[0054] Below, the dampers coupled to the lower housing (210) are described in detail.

[0055]

[0056] 1. About the housing damper

[0057]

[0058] FIG. 3 is a drawing for explaining a housing damper coupled to the lower housing illustrated in FIG. 2.

[0059] According to one embodiment of the present invention, the lower housing (210) functions as a structure on which most of the components of the blower motor are mounted. That is, as described above, the rotor module (230), the stator module (220), and the upper housing (240) are mounted on the upper surface of the lower housing (210), and the PCB substrate (not shown) is mounted on the lower surface of the lower housing (210).

[0060] For example, as illustrated in FIG. 3, the lower housing (210) may have a shape that is approximately circular. First, with respect to the mounting of the rotor module (230), a central through hole (214) is formed in the center of the lower housing (210) on its upper surface and extends through to the lower surface (as illustrated in FIG. 2). A shaft (234) is inserted into the central through hole (214) and extends through it. In addition, a ring-shaped central protrusion (213) is formed in the lower housing (210) that surrounds the central through hole (214) and protrudes upward. Accordingly, as the first bearing (231) of the rotor module (230) is arranged within the central protrusion (213), the rotor module (230) is mounted on the lower housing (210).

[0061] Next, with respect to the mounting of the stator module (220), for example, a plurality of mounting posts (216) may be formed along the circumference with the central through hole (214) concentrically formed on the upper surface of the lower housing (210), and for example, the mounting posts (216) may be arranged to be spaced apart from each other. These mounting posts (216) are used to couple the upper housing (240) to the lower housing (210), and at the same time, surround the stator module (220) to horizontally fix the stator module (220) on the lower housing (210). In other words, the stator module (220) is arranged in a space partially surrounded by the mounting posts (216) of the lower housing (210), so that the stator module (220) is mounted on the lower housing (210).

[0062] Next, the PCB substrate can be attached to the lower surface of the lower housing (210), for example, using bolts, screws, double-sided tape, or adhesive.

[0063] In this way, in the present invention, a rotor module (230), a stator module (220), and a first bearing (which can generate vibration or noise) are mounted on the upper surface of a lower housing (210), and a housing damper (212) is interposed between the lower housing (210) and a flange, so that vibration or noise generated in the rotor module (230), the stator module (220), and the first and second bearings (231, 233) can be attenuated or blocked from being transmitted to the flange via the lower housing (210).

[0064] In addition, in the present invention, since the PCB substrate is mounted on the lower surface of the lower housing (210), (1) the space where the rotor module (230) and the stator module (220) are mounted, and (2) the space where the PCB substrate is mounted are physically separated based on the lower housing (210). Accordingly, the housing damper (212) of the present invention can additionally perform the function of sealing the space where the PCB substrate is mounted by being manufactured in a ring shape that surrounds the edge of the lower housing (210). That is, moisture or foreign substances generated in the space where the rotor module (230) and the stator module (220) are arranged can be prevented from penetrating into the space where the PCB substrate is mounted.

[0065] The housing damper (212) can be integrally connected to the lower housing (210) made of a metal material (e.g., aluminum) by insert molding. The housing damper (212) can be made of a material capable of insert molding, such as a thermosetting material, which can lower the natural frequency of the lower housing made of a metal material, and more specifically, can be made of a rubber material. It should be understood that such a damper material can be applied not only to the housing damper but also to other dampers mentioned below.

[0066] According to one embodiment of the present invention, a housing damper (212) may be molded using a lower housing (210) as an insert in a mold. In addition, when insert molding, a plurality of grooves or through holes (211) may be formed along the edge of the lower housing (210) to firmly bond the housing damper (212) and the lower housing (210).

[0067]

[0068] 2. Regarding the first to fourth dampers

[0069]

[0070] As described above, according to one embodiment of the present invention, since the housing damper (212) is interposed between the lower housing (210) and the flange (coupled to the body), even if vibrations generated in the first and second bearings (231, 233), the rotor module (230), and the stator module (220) are transmitted to the lower housing (210), the vibrations are attenuated or blocked by the housing damper (212), thereby contributing to not being transmitted to the flange or the body.

[0071] However, although these housing dampers (212) may be effective in preventing vibrations transmitted to the lower housing (210) from being transmitted to the flange or body, there is still room for improvement.

[0072] For example, in the case of a blower motor for a vehicle, depending on the rotor rotation speed, the blower motor may generate vibration or noise having a frequency within the range of approximately 200 to 500 Hz. However, a housing damper is typically integrally attached to a lower housing made of a metal material (e.g., aluminum) to lower the natural frequency of the lower housing and thereby attenuate vibration or noise on the lower housing, and is arranged between the lower housing and a flange to provide a function of blocking vibration or noise on the lower housing from being transmitted to the flange. However, in light of the frequency range of vibration or noise generated from the blower motor, there is still a concern that vibration or noise on the lower housing may not be sufficiently attenuated or blocked by the housing damper and may be transmitted to the vehicle body through the flange.

[0073] According to one embodiment of the present invention, by integrally coupling at least one of the first to fourth dampers to the lower housing (210), the natural frequency of the lower housing (210) can be further lowered, thereby attenuating vibration transmitted to the lower housing (210).

[0074] Accordingly, since the vibration or noise on the lower housing (210) is already significantly attenuated before the vibration is blocked by the housing damper (212) through the first to fourth dampers, the vibration generated from the blower motor can be more reliably prevented from being transmitted to the vehicle body.

[0075] In addition, the first to fourth dampers can further enhance the damping function of the first to fourth dampers by designing them in consideration of vibration sources that transmit noise or vibration to the lower housing (210) and the corresponding vibration movement path on the lower housing, as described below, in terms of their arrangement and structure. Hereinafter, the first to fourth dampers will be described in more detail.

[0076]

[0077] A. About the first damper

[0078]

[0079] Fig. 4 is a cross-sectional view of a lower housing according to one embodiment of the present invention. Fig. 5 is a drawing showing a different angle with the first damper removed from Fig. 4 to explain the portion of the lower housing where the first damper is coupled. Fig. 6 is a drawing showing only the first damper with the lower housing removed to explain the structure and arrangement of the first damper.

[0080] As illustrated in FIGS. 4 to 6, the first damper (510) can be configured to lower the natural frequency of the lower housing (210) while at the same time more effectively damping the vibration of the first bearing (231) transmitted to the lower housing (210) within the lower housing (210) and more effectively blocking the vibration from being transmitted radially outward of the rotation axis (C) toward the flange.

[0081] To this end, since the first bearing (231) must be directly coupled to the lower housing (210) for the function of the bearing, it is difficult for a damper to be interposed between the first bearing (231) and the lower housing (210), so according to one embodiment of the present invention, the first damper (510) can be arranged to surround the first bearing (231) in a region around the first bearing (231) on the lower housing (210) without directly contacting the first bearing (231).

[0082] For example, the lower housing (210) may be configured to include a first region (420) including a central protrusion (213) for seating the first bearing (231), and a second region (440) spaced radially outward from the first region (420) of the lower housing (210). The first region (420) and the second region (440) may be connected by a plurality of connecting portions (460, 480).

[0083] Here, the first damper (510) may be placed in a spaced space between the first region (420) and the second region (440). As illustrated in Fig. 6, the first damper (510) may be manufactured in a ring shape concentric with the rotational axis (C) of the first bearing (231) and may be integrally coupled to the lower housing (210). As an example, the first damper (510) may be formed by insert molding.

[0084] According to the above-described structure, the first damper (510) is integrally coupled with the lower housing (210), thereby lowering the natural frequency of the lower housing (210), and at the same time, the vibration transmitted from the first bearing (231) to the lower housing (210) can be more effectively attenuated within the lower housing (210) and more effectively blocked from being transmitted radially outward of the rotation axis (C) toward the flange.

[0085] In addition, more specifically regarding the insert molding method, as illustrated in FIG. 5, the connecting portion (460, 480) may be configured to include a plurality of first connecting portions (460) and a plurality of second connecting portions (480).

[0086] A plurality of first connecting portions (460) are arranged spaced apart from each other in the circumferential direction along the outer periphery of the central protrusion (213) of the first region (420) and extend radially outward from the central protrusion (213) of the first region (420) to connect the first region (420) and the second region (440).

[0087] The second connecting portion (480) may be arranged axially spaced from the first connecting portion (460). In addition, when the lower housing (210) is viewed from above, the first connecting portion (460) and the second connecting portion (480) may be arranged so as not to overlap each other.

[0088] This connection structure may be advantageous when forming the first damper (510) by insert molding. That is, when forming the first damper (510) in a mold using the lower housing (210) as an insert, the molten first damper material may be injected into the separation space between the first region (420) and the second region (440) through the opening formed by the separation between the first connection portions (460) or the separation between the second connection portions (480), thereby manufacturing the first damper in the shape illustrated in FIG. 6, and the first damper (510) may be firmly and integrally connected to the connection structure of the lower housing (210).

[0089]

[0090] B. About the second damper

[0091]

[0092] Fig. 7 is a rear view of the lower housing with the dampers coupled thereto according to one embodiment of the present invention. Fig. 8 is a drawing showing only the second damper with the lower housing removed to explain the structure and arrangement of the second damper.

[0093] The second damper (530) can be configured to lower the natural frequency of the lower housing (210), while more effectively damping vibrations transmitted to the lower housing (210) within the lower housing (210) and more effectively blocking vibrations transmitted radially outward toward the flange.

[0094] For example, as illustrated in FIGS. 7 and 8, the second damper (530) may be disposed on the lower housing (210) between the first damper (510) and the housing damper (212). The second damper (530) may be disposed in a groove (214) formed on the lower surface of the lower housing (210). In addition, as an example, the second damper (530) may be configured as a plurality of flat plates in the shape of circular arcs that are concentric with the rotational axis (C) of the first bearing (231).

[0095] The lower housing (210) is basically configured in a circular plate shape, and the vibration transmitted to the lower housing (210) moves horizontally along the plate-shaped lower housing structure toward the radial outer side of the lower housing (210) and is transmitted to the flange. In this structure, when the second damper (530) is also manufactured in a plate shape, it can be more effective in lowering the natural frequency of the lower housing (210).

[0096] In addition, the second damper (530) is configured with a plurality of arc-shaped plates concentric with the rotation axis (C) of the first bearing (231), so that it can effectively block vibration transmitted from the first or second bearing (231, 233) and moving radially outward along the lower housing (210) of the lower housing (210). Preferably, the second damper (530) can be arranged radially outward from the mounting pillar (216). The vibration of the upper housing (240) can be transmitted to the lower housing (210) through the mounting pillar (216), and this is because the vibration transmitted to the lower housing (210) through the mounting pillar (216) can be effectively blocked from moving radially outward along the lower housing (210) and being transmitted to the flange.

[0097]

[0098] D. Regarding the third and fourth dampers

[0099]

[0100] As described above, according to one embodiment of the present invention, the upper housing (240) can be coupled to the mounting post (216) of the lower housing (210). For example, a fastening groove (217) may be formed on the upper surface of the mounting post (216), and a through hole (242) may be formed in the upper housing (240) at a position corresponding to the fastening groove (217). Accordingly, a fastening member (e.g., a fastening screw) (not shown) may pass through the through hole (242) and be fastened to the fastening groove (217) (wherein a thread is formed), thereby fixing the upper housing (240) to the mounting post (216) of the lower housing (210). Additionally, in order to more firmly bond the upper housing (240) and the mounting post (216), a protrusion (218) may be formed on the upper surface of the mounting post (216), and a through hole (244) corresponding to the protrusion (218) may be formed in the upper housing (240). Accordingly, as illustrated in FIG. 1, when the upper housing (240) is bonded to the mounting post (216) of the lower housing (210), the protrusion (218) extends through the through hole (244), and through the bonding of the protrusion (218) and the through hole (244), the upper housing (240) is auxiliaryly fixed on the mounting post (216) of the lower housing (210).

[0101] In this way, when the upper housing (240) is coupled to the mounting pillar (216) of the lower housing (210), the vibration of the second bearing (233) or the stator module (220) can be transmitted to the lower housing (210) along the upper housing (240).

[0102] According to one embodiment of the present invention, as illustrated in FIG. 4, a fourth damper (570) may be disposed on the upper surface of the mounting column (216) and interposed between the mounting column (216) and the upper housing (240). Accordingly, the fourth damper (570) can effectively block vibration transmitted from the upper housing (240) to the mounting column (216).

[0103] As illustrated in FIG. 4, the fourth damper (570) may be in the form of a flat plate having a shape corresponding to the shape of the upper surface of the mounting pillar (216). In addition, when a protrusion (218) is formed on the upper surface of the mounting pillar (216), a through hole (572) may be formed at a corresponding position in the fourth damper (570) so that the protrusion (218) can extend through the through hole (244) of the upper housing (240).

[0104] Meanwhile, in a structure in which the upper housing (240) is fastened to the mounting pillar (216) of the lower housing (210) by a fastener as described above, the vibration of the upper housing (240) can be transmitted to the mounting pillar (216) of the lower housing (210) through the fastener (even if the fourth damper (570) is provided). Taking this vibration path into account, the third damper (550) according to one embodiment of the present invention can be integrally coupled to the lower housing (210).

[0105] As an example, FIGS. 7 and 9 illustrate a third damper according to one embodiment of the present invention.

[0106] Fig. 7 is a rear view of the lower housing, but the fastening groove (217) on the mounting pillar is drawn in dotted lines so that the arrangement relationship between the fastening hole on the mounting pillar and the third damper can be clearly seen. In addition, Fig. 9 is a drawing showing only the third damper with the lower housing removed, but the fastening groove (217) on the mounting pillar is also drawn in dotted lines so that the arrangement relationship between the fastening hole on the mounting pillar and the third damper can be clearly seen.

[0107] As shown in FIG. 7 and FIG. 9, in order to more effectively dampen vibration transmitted to the lower housing (210) through the fastening hole, a third damper (550) may be placed near the fastening groove (217).

[0108] As an example, the third dampers (550) may be provided in pairs for each fastening groove (217) and may be placed on both sides of the fastening groove (217). Each third damper (550) may be provided in the form of a column having an arc shape concentric with the rotation axis (C).

[0109]

[0110] Although the present invention has been described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Furthermore, the embodiments disclosed in the present invention are not intended to limit the technical idea of ​​the present invention, and all technical ideas falling within the scope of the following claims and equivalents thereof should be construed as being included within the scope of the rights of the present invention.

Claims

1. A rotor module (230) and a stator module (220) including a shaft (234), A lower housing (210) on which the rotor module (230) and the stator module (220) are mounted, A first bearing (231) interposed between the shaft (234) and the lower housing (210), into which the shaft (234) is inserted and extends through, It includes a first damper (510) integrally connected to the lower housing (210), The first damper (510) is formed to surround the first bearing (231) without directly contacting the first bearing (231), thereby lowering the natural frequency of the lower housing (210) and blocking vibration transmitted from the first bearing (231) to the lower housing (210) from being transmitted along the lower housing (210) to the radial outer side of the lower housing (210). Blower motor for vehicle.

2. In paragraph 1, The lower housing (210) includes a first region (420) including a central protrusion (213) for seating the first bearing (231), and a second region (440) arranged radially outwardly from the first region (420) of the lower housing (210). The first region (420) and the second region (440) are connected by a plurality of connecting portions (460, 480) that are spaced apart from each other in the circumferential direction along the outer periphery of the first region (420) and extend radially outward, The above first damper (510) is placed in a spaced space between the first region (420) and the second region (440). Blower motor for vehicle.

3. In paragraph 1, The above first damper (510) has a ring shape concentric with the rotation axis (C) of the above first bearing (231). Blower motor for vehicle.

4. In paragraph 2, The above connecting portions (460, 480) include a plurality of first connecting portions (460) spaced apart from each other along the outer periphery of the first region (420) and a plurality of second connecting portions (480) spaced apart from each other along the outer periphery of the first region (420). The above plurality of first connecting parts (460) and the above plurality of second connecting parts (480) are arranged spaced apart from each other in the axial direction, When looking at the lower housing (210) from above, the plurality of first connecting parts (460) and the plurality of second connecting parts (480) are configured so as not to overlap each other. Blower motor for vehicle.

5. In paragraph 1, Further comprising a ring-shaped housing damper (212) arranged to cover the edge of the lower housing (210) along the circumferential direction. Blower motor for vehicle.

6. In paragraph 5, It further includes a second damper (530) disposed on the lower housing (210) between the first damper (510) and the housing damper (212). The second damper (530) is configured to be integrally connected to the lower housing (210) to lower the natural frequency of the lower housing (210) and at the same time block the vibration transmitted to the lower housing (210) from being transmitted along the lower housing (210) to the radial outer side of the lower housing (210). Blower motor for vehicle.

7. In paragraph 6, The above second damper (530) is composed of a plurality of circular arc-shaped plates concentric with the rotation axis (C) of the first bearing (231). Blower motor for vehicle.

8. In paragraph 1, The above vehicle blower motor is configured to surround the stator module (220) and includes an upper housing (240) that is connected to the lower housing (210) through a fastening hole, It further includes a third damper (550) arranged around the above fastening member, The third damper (550) is configured to be integrally connected to the lower housing (210) to lower the natural frequency of the lower housing (210) and block vibration transmitted to the lower housing (210) through the fastener from being transmitted along the lower housing (210). Blower motor for vehicle.

9. In paragraph 8, The above third damper (550) is provided as a pair and is placed on both sides of the fastening member. Blower motor for vehicle.

10. In paragraph 1, The above vehicle blower motor is configured to surround the stator module (220) and includes an upper housing (240) that is connected to the lower housing (210) through a fastening hole, It further includes a fourth damper (570) interposed between the upper housing (240) and the lower housing (210), The fourth damper (570) is integrally connected to the lower housing (210) to lower the natural frequency of the lower housing (210) and block vibration from the upper housing (240) from being transmitted to the lower housing (210). Blower motor for vehicle.

11. In paragraph 10, On the upper surface of the lower housing (210), mounting columns (216) are formed and arranged spaced apart from each other along the circumferential direction with the rotation axis (C) of the first bearing (231) concentrically. The fourth damper (570) is interposed between the upper housing (240) and the mounting pillar (216). Blower motor for vehicle.

12. In any one of paragraphs 1 to 11, The above damper is formed by insert molding. Blower motor for vehicle.

Images