CN112739894A - Mounting structure of horn mouth - Google Patents
Mounting structure of horn mouth Download PDFInfo
- Publication number
- CN112739894A CN112739894A CN201980061315.8A CN201980061315A CN112739894A CN 112739894 A CN112739894 A CN 112739894A CN 201980061315 A CN201980061315 A CN 201980061315A CN 112739894 A CN112739894 A CN 112739894A
- Authority
- CN
- China
- Prior art keywords
- bell mouth
- fan
- mounting structure
- opening
- fitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A mounting structure (20) of a cylindrical bell mouth (14) is provided, one end side of which is mounted on a fan cover (11), and the other end side of which is mounted on a fan ring (13), so as to cover a gap between the fan cover (11) and the fan ring (13); the mounting structure (20) of the bell mouth (14) comprises a fitting recess (21) having a circular cross section and a fitted projection (22) having a circular cross section, the fitting recess (21) is provided on the outer peripheral portion of the fan ring (13) and is open to the outside in the radial direction of the fan ring (13), and the fitted projection (22) is provided on the opening peripheral edge of the other end side of the bell mouth (14) and is fitted into the fitting recess (21).
Description
Technical Field
The present disclosure relates to a mounting structure of a bell mouth, and more particularly, to a mounting structure of a bell mouth that covers a gap between a fan cover fixed to a radiator and a fan ring fixed to an engine.
Background
As such a mounting structure of the bell mouth, for example, patent documents 1 and 2 disclose a structure in which one end side of the bell mouth is fitted into a fan cover fixed to a radiator, and the other end side of the bell mouth is elastically brought into contact with a fan ring fixed to an engine, thereby mounting the bell mouth between the fan cover and the fan ring.
Documents of the prior art
Patent document
Patent document 1: japanese patent application laid-open No. 2001-123836
Patent document 2: japanese unexamined patent application publication No. 2014-009636
Disclosure of Invention
Technical problem to be solved by the invention
However, relative movement occurs between the fan cover and the fan ring due to engine vibration and the like. Therefore, if the mounting force of the bell mouth cannot completely receive the vibration or relative movement of the engine transmitted to the bell mouth through the fan ring, the bell mouth may be detached and detached from the fan ring or the fan cover.
The disclosed technology aims to effectively prevent the bell mouth from falling off by firmly fixing and holding the bell mouth on the fan ring.
Means for solving the problems
The disclosed technology is a tubular bell-mouth mounting structure, one end side of which is mounted to a fan cover fixed to a radiator, and the other end side of which is mounted to a fan ring fixed to an engine and surrounding a fan, so as to cover a gap between the fan cover and the fan ring; the mounting structure of a bell mouth is characterized by comprising: a fitting recess portion having a circular cross-section, which is provided in an outer peripheral portion of at least one of the fan ring and the fan cover and is open to a radially outer side; and a fitting convex portion having a circular cross-section, which is provided on an opening peripheral edge of at least one of the one end side or the other end side of the bell mouth, and which is fitted into the fitting concave portion.
Preferably, an inclined surface portion is provided outside the opening of the fitting recess, the inclined surface portion extending from the opening end of the fitting recess to be inclined radially outward.
Further, it is preferable that the opening width of the fitting concave portion is formed shorter than the outer diameter of the fitted convex portion, and the bell mouth is swingably held with the fitted convex portion as a fulcrum.
Further, the fitting concave portion may be provided in the fan ring, and the fitted convex portion may be provided in an opening peripheral edge of the other end side of the bell mouth.
The fitting convex portion may have a circular convex portion formed in a substantially circular shape thicker than other portions of the bell mouth on the opening peripheral edge of the bell mouth, and the fitting concave portion may have a circular concave portion having a diameter larger than the diameter of the circular convex portion of the fitting convex portion, and an opening portion having an opening width shorter than the diameter of the circular convex portion.
Effects of the invention
According to the technique of the present disclosure, the bell mouth can be firmly fixed and held to the fan ring, thereby effectively preventing the bell mouth from falling off.
Drawings
Fig. 1 is a schematic rear view showing a fan cover structure to which a bell mouth attachment structure of the present embodiment is applied.
Fig. 2 is a sectional view taken along line II-II of fig. 1.
Fig. 3 is a schematic cross-sectional view showing a bell mouth attachment structure according to the present embodiment.
Detailed Description
Hereinafter, a mounting structure of the bell mouth of the present embodiment will be described based on the drawings. The same components are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[ integral constitution ]
Fig. 1 is a schematic rear view of a fan cover structure 10 to which a bell mouth attachment structure 20 of the present embodiment is applied, and fig. 2 is a sectional view taken along line a-a of fig. 1.
The fan cover structure 10 includes: a fan cover 11; a fan 12 disposed between the fan cover 11 and an engine E (shown only in fig. 2); a fan ring 13 fixed to the engine E and surrounding the fan 12; and a bell mouth 14 that covers between the fan cover 11 and the fan ring 13.
The fan cover 11 is formed in a substantially rectangular cylindrical shape, and an opening edge on one end side thereof is fixed to a rear surface of a radiator, not shown, facing the engine E by bolts or the like. Further, an opening 11A having an inner diameter larger than the outer diameter of the fan 12 is formed on the other end side of the fan cover 11. The opening portion 11A is formed in a substantially circular shape, and defines a ventilation space 15 (shown only in fig. 2) for introducing gas into the fan 12.
The fan 12 is disposed so that its rotational axis coincides with the central axis (axial center) of the fan ring 13, and is accommodated inside the fan ring 13. The fan 12 is rotationally driven by the power of the engine E, for example.
The fan ring 13 is formed in a substantially cylindrical shape, and is fixed to the engine E by bolts (not shown) or the like (see fig. 2). Further, on the outer peripheral surface of the fan ring 13, a 1 st annular flange portion 13A located on the fan cover 11 side and a 2 nd annular flange portion 13B located on the engine E side are formed (both shown in fig. 2). Further, between the 1 st annular flange portion 13A and the 2 nd annular flange portion 13B of the fan ring 13, fitting grooves 21 (both shown in fig. 2) that constitute a part of a bell mouth attachment structure 20 described in detail later are provided.
The bell mouth 14 is formed in a substantially cylindrical shape by an elastic member such as a rubber material or a resin material, and covers a gap between the fan cover 11 and the fan ring 13. Therefore, in the bell mouth 14, the opening peripheral edge portion 14A on one end side (radiator side) is fitted and fixed to the annular recess portion 11B of the fan cover 11 over substantially the entire circumference, and the fitted convex portion 22 provided on the opening peripheral edge on the other end side (engine side) is fitted into the fitting recess portion 21 of the fan ring 13. Hereinafter, the details of the bell-mouth mounting structure 20 will be described with reference to fig. 3.
[ mounting Structure of Bell mouth ]
Fig. 3 is a schematic cross-sectional view showing a bell mouth attachment structure 20 according to the present embodiment.
As shown in fig. 3, the bell-mouth mounting structure 20 includes: a fitting recess 21 recessed in an outer peripheral portion of the fan ring 13; and a fitted projection 22 provided on the periphery of the opening of the horn mouth 14 on the engine side.
The fitting recesses 21 are provided at predetermined pitches in the circumferential direction on the outer peripheral portion of the fan ring 13, and the fitted projections 22 are provided at positions corresponding to the fitting recesses 21 on the opening peripheral edge of the bell mouth 14. These fitting concave portions 21 and fitted convex portions 22 are arranged at least in a pair at upper and lower diagonal positions, or in a pair at upper, lower, left and right diagonal positions. The number and arrangement relationship of the fitting concave portions 21 and the fitted convex portions 22 are not limited to these, and can be set appropriately according to the size of the fan ring 13 or the bell mouth 14.
The fitting recess 21 is formed in a substantially circular shape in cross section that opens radially outward of the fan ring 13. The opening width W of the fitting recess 21 is formed narrower than the diameter D1 of the circular portion (W < D1), and the opening side is narrowed. Further, outside the opening of the fitting recess 21, inclined surface portions 21B, 21C are provided, and the inclined surface portions 21B, 21C extend obliquely outward in the radial direction of the fan ring 13 from the opening end 21A (opening portion) of the fitting recess 21. Each of the inclined surface portions 21B, 21C is formed as: the relative distances from each other expand as they go radially outward of the fan ring 13.
The fitting-to-projection 22 is formed on the opening peripheral edge of the bell mouth 14, and is formed in a substantially circular cross-sectional shape having a wall thicker than other portions of the bell mouth 14. The diameter D2 of the circular portion (circular convex portion) of the fitted convex portion 22 is formed to be longer than the opening width W of the fitting concave portion 21 and slightly shorter than the diameter D1 of the circular portion (circular concave portion) of the fitting concave portion 21 (W < D2 < D1).
That is, when the to-be-fitted convex portion 22 is fitted into the fitting concave portion 21, the peripheral edge of the opening end 21A of the fitting concave portion 21 effectively restricts the to-be-fitted convex portion 22 from being pulled out from the fitting concave portion 21. Further, since the bell mouth 14 is held swingably in the arrow X direction in the drawing with the fitted convex portion 22 as a fulcrum, the bell mouth 14 can flexibly follow the deformation in response to the relative movement of the fan ring 13 and the fan cover 11 (see fig. 1 and 2).
According to the present embodiment described in detail above, the configuration is such that: by providing a fitting recess 21 having a substantially circular cross section and opening radially outward on the outer periphery of the fan ring 13, providing a fitting projection 22 having a substantially circular cross section and thicker than other portions on the periphery of the engine-side opening of the bell mouth 14, and fitting the fitting projection 22 into the fitting recess 21, the bell mouth 14 is swingably and firmly held on the fan ring 13 with the fitting projection 22 as a fulcrum. Thus, the bell mouth 14 is flexibly deformed to follow the relative movement between the fan ring 13 and the fan cover 11 due to the vibration of the engine E and the like, and is reliably held by the fan ring 13, and the bell mouth 14 can be effectively prevented from coming off.
Further, the apparatus is configured to: by providing the inclined surface portions 21B and 21C extending obliquely from the opening end 21A of the fitting recess 21 to the radial outside of the fan ring 13 outside the opening of the fitting recess 21, interference between the bell mouth 14 and the fan ring 13 is effectively prevented. This can effectively prevent the bell mouth 14 from being damaged due to the contact between the bell mouth 14 and the fan ring 13.
The fitted convex portions 22 are not provided in an annular shape over the entire circumference of the bell mouth 14 in the circumferential direction, but are provided partially at a predetermined pitch in the circumferential direction. That is, when the bell mouth 14 is assembled to the fan ring 13, the operator can easily attach the bell mouth 14 to the fan ring 13 without having to enlarge the bell mouth 14 with a large force, and the assembly workability can be effectively improved.
The present disclosure is not limited to the above-described embodiments, and can be modified and implemented as appropriate within a scope not departing from the gist of the present disclosure.
For example, although the explanation has been given by taking as an example the case where the bell mouth mounting structure 20 of the present embodiment is applied to the mounting portions of the bell mouth 14 and the fan ring 13, it may be applied to the mounting portions of the bell mouth 14 and the fan cover 11.
In the illustrated example, the inclined surface portions 21B and 21C are formed in a planar shape, but the inclined surface portions 21B and 21C and the opening end 21A may be connected to each other in a curved shape smoothly.
In addition, although the description has been given of the example in which the fitting concave portions 21 and the fitted convex portions 22 are partially provided at a predetermined pitch in the circumferential direction, they may be provided annularly over the entire circumference in the circumferential direction.
The present application is based on the japanese patent application filed on 20/9/2018 (japanese application 2018-175694), the contents of which are hereby incorporated by reference.
Industrial applicability
The present invention has an effect of preventing the bell mouth from falling off, and is useful for a mounting structure of the bell mouth, and the like.
Description of the reference numerals
10 fan cover structure
11 Fan cover
12 Fan
13 Fan ring
14 horn mouth
Mounting structure of 20 horn mouths
21 fitting recess
21B, 21C inclined surface part
22 are engaged with the convex part
Claims (5)
1. A mounting structure of a cylindrical bell mouth, one end side of which is mounted on a fan cover and the other end side of which is mounted on a fan ring so as to cover a gap between the fan cover and the fan ring, the fan cover being fixed to a radiator, the fan ring being fixed to an engine and surrounding a fan;
the mounting structure of a bell mouth is characterized by comprising:
a fitting recess portion having a circular cross-section, which is provided at an outer peripheral portion of at least one of the fan ring and the fan cover and is open to a radially outer side, and
a fitting convex portion of a circular cross-section, which is provided at an opening peripheral edge of at least one of the one end side or the other end side of the bell mouth, and which is fitted into the fitting concave portion.
2. The bell mouth mounting structure of claim 1,
an inclined surface portion is provided outside the opening of the fitting recess, and the inclined surface portion extends obliquely radially outward from the opening end of the fitting recess.
3. The bell-mouth mounting structure of claim 1 or 2,
the opening width of the fitting concave portion is formed shorter than the outer diameter of the fitted convex portion, and the bell mouth is swingably held with the fitted convex portion as a fulcrum.
4. The bell mouth mounting structure of claim 1,
the fitting recess is provided in the fan ring;
the fitted projection is provided at an opening periphery of the other end side of the bell mouth.
5. The bell mouth mounting structure of claim 4, wherein,
the fitted protrusion has a circular protrusion on the opening periphery of the bell mouth, the circular protrusion being formed in a substantially circular shape thicker than other portions of the bell mouth;
the fitting recess has:
a circular concave portion having a diameter larger than that of the circular convex portion of the fitted convex portion, and
an opening portion having an opening width shorter than the diameter of the circular convex portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-175694 | 2018-09-20 | ||
| JP2018175694A JP2020045841A (en) | 2018-09-20 | 2018-09-20 | Bell mouth mounting structure |
| PCT/JP2019/035141 WO2020059534A1 (en) | 2018-09-20 | 2019-09-06 | Attachment structure for bell mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112739894A true CN112739894A (en) | 2021-04-30 |
Family
ID=69887306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980061315.8A Pending CN112739894A (en) | 2018-09-20 | 2019-09-06 | Mounting structure of horn mouth |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2020045841A (en) |
| CN (1) | CN112739894A (en) |
| WO (1) | WO2020059534A1 (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824417U (en) * | 1981-08-07 | 1983-02-16 | 三菱自動車工業株式会社 | Shroud device |
| JPH01131896A (en) * | 1987-11-16 | 1989-05-24 | Nippon Denso Co Ltd | Parts fitting structure of tank for heat exchanger |
| JPH02119929U (en) * | 1989-03-15 | 1990-09-27 | ||
| JPH0814045A (en) * | 1994-06-23 | 1996-01-16 | Aisin Chem Co Ltd | Cooling fan shroud device |
| JPH1030437A (en) * | 1996-07-18 | 1998-02-03 | Toyota Autom Loom Works Ltd | Fan mounting structure in radiator |
| JP2002054441A (en) * | 2000-08-10 | 2002-02-20 | Komatsu Ltd | Engine cooling device |
| JP2005188460A (en) * | 2003-12-26 | 2005-07-14 | Hitachi Constr Mach Co Ltd | Engine cooling device for construction machinery |
| CN103410845A (en) * | 2013-07-09 | 2013-11-27 | 郑州飞机装备有限责任公司 | Tensile ball hinge structure |
| JP2014009636A (en) * | 2012-06-29 | 2014-01-20 | Isuzu Motors Ltd | Fan shroud structure |
| JP2017081244A (en) * | 2015-10-23 | 2017-05-18 | いすゞ自動車株式会社 | Attachment structure of fan cover |
| CN112739895A (en) * | 2018-09-20 | 2021-04-30 | 五十铃自动车株式会社 | Mounting structure of horn mouth |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741434Y2 (en) * | 1978-12-26 | 1982-09-10 | ||
| JPH084530A (en) * | 1994-06-23 | 1996-01-09 | Aisin Chem Co Ltd | Cooling fan shroud device |
-
2018
- 2018-09-20 JP JP2018175694A patent/JP2020045841A/en active Pending
-
2019
- 2019-09-06 CN CN201980061315.8A patent/CN112739894A/en active Pending
- 2019-09-06 WO PCT/JP2019/035141 patent/WO2020059534A1/en active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824417U (en) * | 1981-08-07 | 1983-02-16 | 三菱自動車工業株式会社 | Shroud device |
| JPH01131896A (en) * | 1987-11-16 | 1989-05-24 | Nippon Denso Co Ltd | Parts fitting structure of tank for heat exchanger |
| JPH02119929U (en) * | 1989-03-15 | 1990-09-27 | ||
| JPH0814045A (en) * | 1994-06-23 | 1996-01-16 | Aisin Chem Co Ltd | Cooling fan shroud device |
| JPH1030437A (en) * | 1996-07-18 | 1998-02-03 | Toyota Autom Loom Works Ltd | Fan mounting structure in radiator |
| JP2002054441A (en) * | 2000-08-10 | 2002-02-20 | Komatsu Ltd | Engine cooling device |
| JP2005188460A (en) * | 2003-12-26 | 2005-07-14 | Hitachi Constr Mach Co Ltd | Engine cooling device for construction machinery |
| JP2014009636A (en) * | 2012-06-29 | 2014-01-20 | Isuzu Motors Ltd | Fan shroud structure |
| CN103410845A (en) * | 2013-07-09 | 2013-11-27 | 郑州飞机装备有限责任公司 | Tensile ball hinge structure |
| JP2017081244A (en) * | 2015-10-23 | 2017-05-18 | いすゞ自動車株式会社 | Attachment structure of fan cover |
| CN112739895A (en) * | 2018-09-20 | 2021-04-30 | 五十铃自动车株式会社 | Mounting structure of horn mouth |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020045841A (en) | 2020-03-26 |
| WO2020059534A1 (en) | 2020-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210430 |
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| WD01 | Invention patent application deemed withdrawn after publication |