Blower Device
The blower device's adaptable flange and case structure addresses the high cost of mold changes by allowing flexible attachment to various surfaces, achieving cost-effective and robust mounting.
Patent Information
- Application Number
- JP2023208609
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-02-22
- Filing Date
- 2023-12-11
- Publication Date
- 2025-08-07
- Estimated Expiration
- 2039-02-20
AI Technical Summary
Existing blower devices require new molds for changing the position of fixed mounting legs, increasing manufacturing costs when adapting to different mounting surfaces.
A blower device with a blower case and flange structure that allows selective attachment of fixing members to various mounting surfaces using resin components with adjustable mounting angles and multiple attachment points, reducing the need for mold changes.
Enables attachment to diverse mounting surfaces at lower costs by standardizing the blower case design, minimizing mold variations, and enhancing fixation strength through multiple attachment options.
Smart Images
Figure 0007720382000001 
Figure 0007720382000002 
Figure 0007720382000003
Abstract
Description
[Technical Field]
[0001] The present invention relates to a blower device, and more particularly to a blower device characterized by a structure for fixing to an object to which it is attached. [Background technology]
[0002] Blower units using centrifugal fans are widely used for cooling, ventilation, air conditioning, etc. in home appliances, office equipment, and industrial and vehicle equipment. The above-mentioned blower units have traditionally been comprised of an electric motor, a fan connected to the motor via a rotating shaft, a blower lower case to which the motor is fixed, and multiple fixing legs attached to the blower lower case, each with through holes for screw fastening. The blower lower case is then secured to a mounting surface by multiple fixing mounting legs.
[0003] Therefore, the above-mentioned blower device is fixed to the mounting surface only by the fixed mounting legs provided on the blower lower case, which ensures the strength of the housing and reduces the number of parts and assembly labor.Furthermore, a blower device is known in which the blower lower case and the blower upper case are connected only by hooks, eliminating the need for screws and simplifying assembly (see, for example, Patent Document 1). [Prior art documents] [Patent documents]
[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-104365 Summary of the Invention [Problem to be solved by the invention]
[0005] In the blower device described in Patent Document 1, the fixed mounting legs for fixing to the mounting object are integrally formed with the blower lower case. With this structure, for example, if the position at which the blower is fixed to the mounting object (base) needs to be changed, a new blower lower case must be molded with the fixed mounting legs in a different position. In this case, a new mold must be prepared to mold the blower lower case. However, changing the mold is not desirable because it increases manufacturing costs.
[0006] In light of the above-mentioned background, an object of the present invention is to provide a blower device that can be attached to objects having various shapes, such as facilities, devices, equipment, and structures, at low cost. [Means for solving the problem]
[0007] The present invention is directed to an air outlet and Intake port a blower case having the above-mentioned structure, an impeller housed in the blower case, and a first fixing member and a second fixing member provided on an outer peripheral surface of the blower case and fixed to an object to which the blower case is attached, wherein the blower case comprises a first case made of resin and a second case made of resin, the first fixing member and the second fixing member are formed of resin, The first case is Opening toward the rotation axis The suction port is provided, Opening in the circumferential direction The air outlet is formed by the first case and the second case, and a plurality of protrusions extending in the axial direction are formed on the outer peripheral surface of the second case in the circumferential direction, and the first fixing member and the second fixing member can be selectively attached to the tips of the plurality of protrusions, and the first fixing member is No. 1 through hole The first surface on which have No. 1 Fixed mounting legs; The first part, The relevant No. 1 Fixed mounting legs and a second portion between the first portion, The second fixing member is No. 2 through hole The second surface on which have a second fixed mounting leg, a third fixed mounting leg having a third surface with a third through hole formed therein, a third portion between the second fixed mounting leg and the third fixed mounting leg, a fourth portion between the third portion and the second fixed mounting leg, and a fifth portion between the third portion and the third fixed mounting leg; The relevant 3 a groove formed in the portion; The first portion of the first fixing member has an inner circumferential surface attached to tips of selected first and second protrusions from among the plurality of protrusions, the third portion of the second fixing member has an inner circumferential surface attached to tips of selected third and fourth protrusions from among the plurality of protrusions, the first surface of the first fixed mounting leg is inclined with respect to the inner circumferential surface of the first portion of the first fixing member facing the outer circumferential surface of the second case, the surface of the second portion that is continuous with the first surface of the first fixed mounting leg is inclined with respect to the inner circumferential surface of the first portion, and the front surface of the second fixed mounting leg is inclined with respect to the inner circumferential surface of the first portion in the circumferential direction of the second case. the second surface and the third surface of the third fixed mounting leg are inclined with respect to the inner circumferential surface of the third portion of the second fixing member facing the outer circumferential surface of the second case; in the circumferential direction of the second case, a surface of the fourth portion that is continuous with the second surface of the second fixed mounting leg is inclined with respect to the inner circumferential surface of the third portion; in the axial direction, the surface of the fourth portion of the second fixing member is inclined with respect to the second surface of the second fixed mounting leg; in the circumferential direction of the second case, a surface of the fifth portion that is continuous with the third surface of the third fixed mounting leg is inclined with respect to the inner circumferential surface of the third portion; and in the axial direction, the surface of the fifth portion of the second fixing member is inclined with respect to the third surface of the third fixed mounting leg. It is a blower device.
[0008] In the present invention, the first fixing member and the above In one embodiment, the second fixing member is bonded to the second case. No. 1 Fixed mounting legs , the second fixed mounting leg, or the third fixed mounting leg The mounting angle of the mounting member can be selected.
[0009] According to the present invention, a blower device can be obtained that can be attached to objects having various shapes at low cost. [Brief explanation of the drawings]
[0010] [Figure 1] FIG. 2 is an exploded perspective view of the blower device according to the embodiment. [Figure 2] FIG. 2 is a perspective view of the blower device when assembled from the exploded perspective view of FIG. 1. [Figure 3] 2 is a view of the exploded perspective view of the blower device of the embodiment shown in FIG. 1 rotated 180 degrees about the Y axis as a rotation axis. [Figure 4] FIG. 4 is a perspective view of the blower device when assembled from the exploded perspective view of FIG. 3. [Figure 5] FIG. 10 is an exploded perspective view of a blower device according to another embodiment. [Figure 6] FIG. 10 is a perspective view of a blower device according to another embodiment before a flange is attached to the blower device. [Figure 7] FIG. 7 is a partially enlarged view of the blower device shown in FIG. [Figure 8] FIG. 7 is a perspective view of the blower device shown in FIG. 6 with a flange attached thereto. [Figure 9] FIG. 10 is a perspective view of a blower device according to another embodiment. [Figure 10] 10 is a cross-sectional view of the blower device shown in FIG. 9 with a flange attached thereto. [Figure 11] FIG. 10 is a perspective view of a retaining block for the flange shown in FIG. 9. [Figure 12] 10 is a cross-sectional view schematically showing a state in which a blower lower case and a flange are joined in the blower device shown in FIG. 9. FIG. DETAILED DESCRIPTION OF THE INVENTION
[0011] 1. First embodiment (1) Blower unit structure FIG. 1 is an exploded perspective view of the blower device of this embodiment. FIG. 2 is a perspective view of the blower device when assembled from the exploded perspective view of FIG. 1. FIG. 3 is a view of the blower device when rotated 180° around the Y-axis as the rotation axis of the exploded perspective view of FIG. 1. FIG. 4 is a perspective view of the blower device when assembled from the exploded perspective view of FIG. 3. FIGS. 1 to 4 show a blower device 1 using a centrifugal fan of this embodiment. The basic structure of the blower device 1 is substantially the same as the structure described in Patent Document 1, and includes a blower case 2 and a flange 3 which is a fixing member for fixing the blower case 2 to an object to which it is attached. The flange 3 has , Kan A plurality of fixed mounting legs 4 with through holes are formed. The flange 3 is detachable from the blower case 2. In this example, three fixed mounting legs 4 are arranged on the flange 3. The number of fixed mounting legs 4 is not limited as long as there is at least one. The design of the fixed mounting legs 4 shown in the figure is also an example, and can be changed depending on the shape of the object to be mounted, etc.
[0012] The blower case 2 is composed of a blower upper case 5 and a blower lower case 6. An impeller 7, which is the blade part of a centrifugal fan and promotes the intake and exhaust of air, is housed between the blower upper case 5 and the blower lower case 6. The blower upper case 5 has an intake port 8, and a motor 9, which is an electric motor for rotating the impeller 7, is fixed to the blower lower case 6. The blower upper case 5 and the blower lower case 6 are connected by inserting a retaining boss 10 formed on the blower lower case 6 into a retaining boss insertion hole 11 formed on the blower upper case 5. In this connected state, the blower upper case 5 and the blower lower case 6 are fitted together at their mating surfaces. An air outlet 12 (see FIG. 2) is formed by fitting the blower upper case 5 and the blower lower case 6 together.
[0013] When the blower upper case 5 and the blower lower case 6 are joined, the tips of the retaining bosses 10 that pass through the retaining boss insertion holes 11 protrude from the retaining boss insertion holes 11. These protruding portions are crushed by thermal crimping, thereby ensuring the joining strength between the blower upper case 5 and the blower lower case 6. Here, thermal crimping refers to the process of crushing the tips of the bosses inserted into the holes with heat and pressure, and fixing the bosses to the parts where the holes are provided, as well as the resulting structure. In this example, there are four retaining bosses 10 and four retaining boss insertion holes 11, but the numbers are not limited thereto.
[0014] A plurality of protrusions 13 are formed on the outer periphery of the blower lower case 6 for sliding the flange 3 in the axial direction and fitting thereto. Here, the axial direction is the extension direction of the rotation shaft of the impeller 7, which coincides with the direction of the Y axis in the figure. The protrusions 13 have a rail structure extending in the axial direction and have a cross-sectional shape that engages and fits with a slide groove 15 (described later) formed in the flange 3 so as to be slidable in the axial direction. In this example, when viewed from the axial direction, the protrusions 13 have a convex shape (approximately T-shaped) and the slide groove 15 has a concave shape (a shape that accommodates the approximately T-shaped groove). The engagement between the two allows for sliding in the axial direction but prevents relative movement in other directions. In addition, an axially extending recess is provided on the upper part of the protrusions 13 to accommodate a boss 16 (described later).
[0015] A flange boss insertion hole 14 is formed at the tip of the protrusion 13 on the mating surface side with the blower upper case 5. Meanwhile, a slide groove 15 is formed in the inner peripheral portion (the surface on the blower case 2 side) of the flange 3, and a boss 16 is integrally formed at the location where the slide groove 15 is formed. As described above, the slide groove 15 is fitted into the protrusion 13 in a state where it can slide in the axial direction, and in this state the boss 16 is housed in the recess on the upper part of the protrusion 13. At least one slide groove 15 is required to be formed on the inner peripheral portion of the flange 3, but two or more are preferable from the viewpoint of ensuring strength. The more slide grooves 15 formed, the stronger the fixation to the blower case 2.
[0016] With the above-described structure of the blower lower case 6 and flange 3, the protrusion 13 formed on the outer periphery of the blower lower case 6 engages with the slide groove 15, causing it to slide and secure the flange 3 to the blower lower case 6. At this time, the boss 16 formed on the flange 3 is fitted into and inserted into the flange boss insertion hole 14 formed in the blower lower case 6 and the flange boss insertion hole 17 formed in the blower upper case 5. As a result, the tip of the boss 16 protrudes from the flange boss insertion hole 17. In addition, the tip of the retaining boss 10 provided on the blower lower case 6 protrudes from the retaining boss insertion hole 11 in the blower upper case 5.
[0017] The tip of the retaining boss 10 protruding from the retaining boss insertion hole 11 in the blower upper case 5 and the tip of the boss 16 protruding from the flange boss insertion hole 17 in the blower upper case 5 are each heat caulked to fix the retaining boss 10 and the boss 16 to the blower upper case 5. Here, the retaining boss 10 formed on the blower lower case 6 and the boss 16 formed on the flange 3 may be structured so that after being inserted through the flange boss insertion hole 17, the tip splits into two and becomes caught in the insertion holes 11 and 17, thereby fixing the retaining boss 10 and the boss 16. Also, the retaining boss 10 and the boss 16 may be fixed to the insertion holes 11 and 17 by a method other than heat caulking, such as adhesive.
[0018] As described above, when the flange 3 is attached to the blower lower case 6, the blower upper case 5 and the blower lower case 6 are simultaneously joined and fixed.
[0019] The motor 9 includes a shaft 18. The shaft 18 is the rotation axis of the motor 9 and connects the impeller 7 to the motor 9. With this structure, the shaft 18 rotates the impeller 7 in synchronization with the rotation of the motor 9. The blower device 1 then blows out the air drawn in through the suction port 8 from the air outlet 12 by the rotation of the impeller 7.
[0020] The protrusions 13 are formed on the outer periphery of the blower lower case 6, and there are more of them than the slide grooves 15 formed in the flange 3 so that multiple attachment positions for the flange 3 to the blower lower case 6 can be selected. For example, in addition to the form in which the flange 3 is fixed to the blower lower case 6 in the positional relationship shown in FIG. 1, the flange 3 can also be fixed at the portion indicated by reference numeral 19 in FIG. 1. In this case, the slide grooves 15 are fitted into the protrusions 13 at the portion indicated by reference numeral 19. In this case, however, the shape of the flange 3 must be changed so that it does not interfere with the blower lower case 6 in the area of the air outlet 12.
[0021] The number of protrusions 13 is preferably as large as possible. This is because forming more protrusions 13 on the outer periphery of the blower lower case 6 increases the variety of mounting positions for the flange 3. For example, if two or more slide grooves 15 are formed on the inner periphery of the flange 3, the intervals between the protrusions 13 are set to be the same as the intervals between the slide grooves 15, and three or more protrusions 13 are provided. This allows the flange 3 to be fixed to the blower lower case 6 at two or more locations. In other words, multiple locations around the circumferential direction of the blower lower case 6 are available as potential fixing positions for the flange 3 to the blower lower case 6. The mounting angle position of the flange 3 around the axis of the blower lower case 6 can then be selected from multiple options.
[0022] The flange boss insertion holes 14 formed in the blower lower case 6 and the flange boss insertion holes 17 formed in the blower upper case 5 are formed so as to be located at corresponding positions when the blower upper case 5 and the blower lower case 6 are fitted together. In particular, the number of flange boss insertion holes 17 formed in the blower upper case 5 is not necessarily limited to the same as the number of protrusions 13 on the blower lower case 6 (or the number of flange boss insertion holes 14 formed at the tips of the protrusions 13), but having the same number increases versatility when attaching the flanges 3.
[0023] (2) Features of device manufacturing By retrofitting the flange 3 and providing multiple variations in its fixing position, it is possible to standardize the blower case 2 (including the fan motor 9). Standardization means that the mold for manufacturing the blower case 2 only needs to be made once, significantly reducing manufacturing costs. Furthermore, reducing the number of times the mold needs to be made also reduces variations in the characteristics of the blower device caused by the mold.
[0024] Only the flange 3 having the fixed mounting legs 4 is remanufactured each time according to the shape of the mounting surface. In other words, the present invention provides a blower device 1 that can be adapted to various shapes of mounting surfaces by remanufacturing only the flange 3. Compared to the conventional method of remanufacturing the blower case 2 (blower lower case 6) and flange 3 according to the shape of the mounting surface, the present invention can reduce the manufacturing cost and shorten the manufacturing time of the blower device 1.
[0025] (3) Features of device fixation By appropriately selecting the multiple protrusions 13 formed on the outer periphery of the blower lower case 6, it is possible to arbitrarily set the mounting angle (angular position around the axis) of the fixed mounting legs 4. In addition, since multiple fitting points are set when fitting the blower case 2 and flange 3, the fitted state becomes stronger.
[0026] That is, in this structure, the blower upper case 5 and the blower lower case 6 are joined by inserting the retaining boss 10 into the retaining boss insertion hole 11 and heat caulking. In addition, the flange 3 is joined to the blower lower case 6 by engaging the protrusion 13 with the slide groove 15, and the flange 3 is fixed to the blower upper case 5 by inserting the boss 16 into the flange boss insertion hole 17 and heat caulking. That is, the blower upper case 5 and the blower lower case 6 are joined not only directly but also via the flange 3. Therefore, the blower upper case 5 and the blower lower case 6 are joined to each other with high fastening strength.
[0027] (Variation) The roles of the protrusion 13 and the sliding groove 15 may be reversed. That is, a structure is possible in which a protrusion extending in the axial direction is provided on the flange 3 side, and a groove that fits axially with the protrusion is provided on the blower lower case 6 side.
[0028] The roles of the retaining boss 10 and the retaining boss insertion hole 11 may be reversed. That is, a hole may be provided on the blower lower case 6 side, and a boss that is inserted into the hole may be provided on the blower upper case 5 side.
[0029] Although not shown, wiring is drawn from the motor 9 and connected to a motor drive circuit (not shown). When mounting the blower device 1, care must be taken when routing the wiring. The protrusions 13 may be used to attach a wiring fixture that secures the wiring. In this case, the wiring fixture is fixed to the protrusions 13 that are not used to secure the flange 3, and the wiring is fixed to this wiring fixture. The wiring fixture is attached to the protrusions 13 by providing a groove similar to the slide groove 15 in the wiring fixture and fitting this groove into the protrusion 13 in the axial direction. Note that even in this example, it is possible to reverse the relationship between the protrusion and groove.
[0030] 2. Second embodiment (1) Structure and features of the blower unit FIG. 5 is an exploded perspective view of the blower device of this embodiment. In the blower device 1 of the first embodiment shown in FIG. 3, the flange 3 is fixed to the blower lower case 6 by inserting a flange fixing boss 16 provided on the flange 3 into a flange boss insertion hole 14 of the blower lower case 6 and a flange boss insertion hole 17 of the blower upper case 5, and then crushing the tip of the boss 16 by thermal caulking. In contrast, in the blower device 1 of the embodiment shown in FIG. 5, a tapping screw 20 is used as a fastening member instead of the boss 16. Therefore, the blower lower case 6 may or may not have the flange boss insertion hole 14. Note that if the blower lower case 6 has the flange boss insertion hole 14 or a similar hole, a structure that allows the tapping screw 20 to be inserted therethrough will result in a stronger connection. The flange 3 does not have a boss 16 but has a fastening portion 21 (or fastening point) into which the tip of the tapping screw 20 is screwed for fastening. For example, a pilot hole is formed in the fastening portion 21 into which a tapping screw 20 is screwed, and the tapping screw 20 inserted into the flange boss insertion hole 17 is screwed into the pilot hole, thereby integrating the blower upper case 5, the blower lower case 6 and the flange 3.
[0031] Therefore, in this embodiment, the blower lower case 6 is fixed to the flange 3 by inserting a tapping screw 20 into the flange boss insertion hole 17 of the blower upper case 5 and fastening it to the fastening portion 21 on the end face of the fixed mounting leg 4 of the flange 3. In this embodiment, fastening is performed with the tapping screw 20, so the connection strength can be increased compared to the first embodiment in which fastening is performed with the boss 16. Note that other parts are the same as those of the blower device 1 shown in FIG. 3. Note that instead of the tapping screw, a general bolt, screw, split pin, etc. may be used as the fastening member.
[0032] 3. Modifications of the First and Second Embodiments In the blower device 1 shown in the first and second embodiments, the blower upper case 5 and the blower lower case 6 are joined by inserting the retaining boss 10 formed on the blower lower case 6 into the retaining boss insertion hole 11 formed on the blower upper case 5 and crushing the tip of the retaining boss 10 protruding from the retaining boss insertion hole 11 of the blower upper case 5 with thermal caulking, but instead of the retaining boss 10, for example, a locking mechanism with a locking claw such as a snap fit may be formed integrally with the blower upper case 5, and the locking claw may be used to lock and join the blower lower case 6.
[0033] Alternatively, the blower upper case 5 and the blower lower case 6 may be joined together with a locking mechanism such as a snap fit, and the flange 3 having the fixed mounting legs 4 may be fixed to a protrusion 13 formed on the outer periphery of the blower lower case 6 with a retaining boss 16 or a tapping screw 20. Specifically, a locking mechanism with a locking claw that serves as a convex portion such as a snap fit may be formed integrally with the blower upper case 5, and a locking mechanism with a recess that engages with the locking claw may be formed integrally with the blower lower case 6, and the blower upper case 5 and the blower lower case 6 may be joined together by engaging the locking claw with the recess. The flange 3 having the fixed mounting legs 4 may be formed with a retaining boss 10, which may be inserted into a through-hole formed in a protrusion 13 formed on the outer periphery of the blower lower case 6, and the tip of the retaining boss 10 protruding from the through-hole may be crushed to secure the case in place. Alternatively, instead of the retaining boss 10, a through-hole may be formed in the flange 3 having the fixed mounting legs 4, and tapping screws 20 may be inserted through the through-holes formed in the protrusions 13 formed on the outer periphery of the blower lower case 6 and the through-holes formed in the flange 3 to fasten and secure the case in place. The mating surfaces of the blower upper case 5 and the blower lower case 6 are fitted together with a concave-convex fit.
[0034] 6 to 8 may be used instead of fixing the case and flange 3 with tapping screws 20. In the structures of FIGS. 6 to 8, a locking claw 30 is integrally formed at the tip of flange 3 having fixed mounting legs 4, recesses 31 are formed on the underside of flange 3 into which protrusions formed on blower lower case 6 fit, and locking claws 30 are formed at the tips of protrusions formed between recesses 31. Protrusions 23 are formed on blower lower case 6, recesses (grooves) 22 are formed between protrusions 23, and a bridge 24 connecting the two protrusions 23 is formed on one end side (blower upper case 5 side) of recesses (grooves) 22. Then, the locking claws 30 are inserted into the recesses (grooves) 22 between the protrusions formed on the blower lower case 6, and the protrusions 23 formed on the blower lower case 6 are fitted and slid into the recesses 31 formed on the underside of the flange 3, and after the locking claws 30 pass under the bridge portions 24, the locking claws 30 engage with the bridge portions 24, whereby the flange 3 having the fixed mounting legs 4 is attached and fixed to the blower lower case 6. The blower upper case 5 and the blower lower case 6 are joined together as follows: A locking mechanism 26 having a locking claw that becomes a convex portion like a snap fit 25 is formed integrally with the blower upper case 5, and a locking mechanism 27 having a recess that engages with the locking claw of the locking mechanism 26 is formed integrally with the blower lower case 6, and the locking claw and the recess are They join by engaging.
[0035] 4. Third Embodiment (1) Structure and features of the blower unit FIG. 9 is a perspective view of the blower device of this embodiment. In the blower device 1 of the third embodiment shown in FIG. 9, the above-mentioned snap fits 25 are used as fastening members for the blower upper case 5 and the blower lower case 6. There is no limit to the number of snap fits 25, but it is preferable to arrange multiple snap fits around the circumference of the blower case. The number is selected appropriately taking into consideration fastening strength and cost. As shown in FIG. 10, the mating surfaces of the blower upper case 5 and the blower lower case 6 are fitted with a concave-convex fit.
[0036] Two rows of rail-like protrusions 28 are formed on the outer peripheral surface of the blower lower case 6. Of these protrusions 28, the protrusion 28 that corresponds to a predetermined position is selected as needed, and the protrusion 28 is slid into the groove 32 of the flange 3 to mount it. While Fig. 9 shows an example in which two flanges, 3a and 3b, are mounted on the blower lower case 6, this is not limiting, and the position and number of flanges 3 can be selected depending on the installation conditions of the blower device.
[0037] 12, one protrusion 28 on the blower lower case 6 side is a convex portion with a substantially T-shaped cross section, and the sliding groove 24 on the flange 3 side is formed with a substantially T-shaped concave portion to receive the protrusion 28. This restricts movement of the flange 3 from the blower lower case 6 in the direction of the thick arrow in FIG. 10, preventing the flange 3 from falling off the blower lower case 6.
[0038] The protrusions 28 and the grooves 32 are formed so as to fit closely to each other, but if rattle occurs between the protrusions 28 and the grooves 32 due to the dimensional precision of the resin-molded components, tiny ribs (protrusions) extending along the axial direction (Y direction) may be provided in multiple locations on either the outer peripheral surface of the protrusions 28 or the inner peripheral surface of the grooves 32. In this case, when the flange 3 is slid, the ribs (protrusions) are attached while undergoing plastic deformation, so that the protrusions 28 and the grooves 32 can be brought into closer contact with each other, and rattle can be prevented when the flange 3 is attached.
[0039] Fig. 10 is a cross-sectional view showing the attached state of flange 3b of the two flanges 3 in Fig. 9. When flange 3b abuts against rear end surface 33 of protrusion 28 of the blower lower case, movement of flange 3b in the Y-axis direction (toward blower upper case 5) is restricted, and it functions as a stopper.
[0040] The flange 3, which is slidably mounted onto the projection 28 of the blower lower case 6, is fixed in place in a direction perpendicular to the axial direction by a retaining block 50. As shown in FIG. 11, the retaining block 50 has two locking claws 51 and two feet 52. Each foot 52 has a semicircular protrusion 53 on its side. As shown in FIG. 9, the locking claws 51 and feet 52 of the retaining block 50 are inserted into the locking claw insertion holes 40 and foot insertion holes 41 formed in the flange 3, respectively.
[0041] When the foot 52, on which a semicircular protrusion 53 is formed, is inserted into the two foot insertion holes 41 of the flange 3, the protrusion 53 is attached in a state of being pressed against the inner circumferential surface of the insertion hole 41 and the stepped portion of the blower lower case 6. Furthermore, when the locking claw 51 is inserted into the two locking claw insertion holes 40, the locking claw 51 is locked to the end of the insertion hole 40. This prevents the flange 3 from coming off the blower lower case 6. Furthermore, the protrusion 53 of the foot 52 abuts against the front end surface 34 of the protrusion 28 of the blower lower case 6, thereby acting as a stopper that restricts movement of the flange 3 in the direction opposite to the Y axis (towards the blower lower case 6).
[0042] Thus, in the first and second embodiments, the flange serving as the fixing member is fixed in the axial direction to a protrusion formed on the outer periphery of the blower lower case by the retaining boss 10 or the tapping screw 20, but in the third embodiment, the flange serving as the fixing member is fixed in a direction perpendicular to the axial direction to a protrusion formed on the outer periphery of the blower lower case by the retaining block 50. Note that the structure of the retaining block 50 is not limited to the embodiments, as long as the flange serving as the fixing member is fixed in a direction perpendicular to the axial direction. [Explanation of symbols]
[0043] 1...blower device, 2...blower case, 3...flange, 4...fixed mounting leg, 5...blower upper case, 6...blower lower case, 7...impeller, 8...suction port, 9...motor, 10...preventive boss (for connecting to blower case), 11...preventive boss insertion hole, 12...blowout port, 13...projection, 14...flange boss insertion hole (formed in blower lower case), 15...slide groove, 16...boss (for fixing flange), 17...flange boss insertion hole (formed in blower upper case), 18...shaft, 19...fixing point, 20...tapping screw, 21...fastening portion, 22...recess (groove), 23...projection, 24...bridge portion, 25... snap fit , 26… Snap fit locking mechanism , 27… Snap fit Locking mechanism, 28...protrusion, 30...locking claw, 31...recess, 32...slide groove, 33...rear end surface of protrusion, 34...front end surface of protrusion, 40...locking claw insertion hole, 41...foot insertion hole, 50...anti-slip block, 51...locking claw, 52...foot, 53...protrusion.
Claims
1. a blower case having an outlet and an inlet; an impeller housed in the blower case; a first fixing member and a second fixing member provided on an outer peripheral surface of the blower case and fixed to an attachment target of the blower case; Equipped with the blower case includes a first case formed of resin and a second case formed of resin, the first fixing member and the second fixing member are formed of resin, the first case has the suction port that opens toward the rotation axis direction, The air outlet opening in the circumferential direction is formed by the first case and the second case, A plurality of protrusions extending in the axial direction are formed on the outer peripheral surface of the second case in the circumferential direction, the first fixing member and the second fixing member are selectively attachable to tips of the plurality of protrusions, the first fixing member includes a first fixing mounting leg having a first surface with a first through hole formed therein, a first portion, and a second portion located between the first fixing mounting leg and the first portion; the second fixing member comprises a second fixed mounting leg having a second surface in which a second through hole is formed, a third fixed mounting leg having a third surface in which a third through hole is formed, a third portion between the second fixed mounting leg and the third fixed mounting leg, a fourth portion between the third portion and the second fixed mounting leg, a fifth portion between the third portion and the third fixed mounting leg, and a groove formed in the third portion; the first portion of the first fixing member has an inner circumferential surface attached to tips of selected first and second protrusions from among the plurality of protrusions; the third portion of the second fixing member has an inner circumferential surface attached to tips of selected third and fourth protrusions from among the plurality of protrusions, In the circumferential direction of the second case, the first surface of the first fixed mounting leg is inclined with respect to the inner circumferential surface of the first portion of the first fixing member that faces the outer circumferential surface of the second case, In the circumferential direction of the second case, a surface of the second portion that is continuous with the first surface of the first fixed mounting leg is inclined with respect to the inner circumferential surface of the first portion, In the circumferential direction of the second case, the second surface of the second fixed mounting leg and the third surface of the third fixed mounting leg are inclined with respect to the inner circumferential surface of the third portion of the second fixing member facing the outer circumferential surface of the second case, In the circumferential direction of the second case, a surface of the fourth portion that is continuous with the second surface of the second fixed mounting leg is inclined with respect to the inner circumferential surface of the third portion, In the axial direction, a surface of the fourth portion of the second fixing member is inclined with respect to the second surface of the second fixed mounting leg, In the circumferential direction of the second case, a surface of the fifth portion that is continuous with the third surface of the third fixed mounting leg is inclined with respect to the inner circumferential surface of the third portion, In the axial direction, a surface of the fifth portion of the second fixing member is inclined with respect to the third surface of the third fixed mounting leg. Blower device.
2. The blower apparatus according to claim 1 , wherein the first fixing member and the second fixing member are adhered to the second case.
3. 3. The blower device according to claim 1, wherein an attachment angle of the first fixed attachment leg, the second fixed attachment leg, or the third fixed attachment leg relative to the second case in the circumferential direction is selectable.
Citation Information
Patent Citations
Motor outer shell with foot base
CN1716731A
Tandem fan
CN203770178U
JP1933-018165Y
Housing for blower
JP1992269399A
Sphere pump
JP1997126198A