JP5845846B2 - Intake duct device - Google Patents

Description

  The present invention relates to an intake duct device for supplying air to an engine of a vehicle.

  Conventionally, as this type of intake duct device, for example, a configuration as disclosed in Patent Document 1 has been proposed. In this conventional configuration, a first branch portion and a second branch portion are formed so as to protrude adjacent to the intake duct. A hose connection part is connected to the first branch part. A blow-by gas recirculation hose is connected to the hose connection part. A resonator is connected to the second branch section. The resonator is integrally connected to the hose connecting portion via the connecting portion.

JP 2009-203901 A

  In the intake duct device of this conventional configuration, in the configuration in which the resonator and the hose connecting portion are integrally connected via the connecting portion as described above, injection molding is easy if these members are divided in half. It is. In this case, the rigidity of the periphery of the connecting portion is high because the connecting portion, the resonator, and the wall portion of the hose connecting portion exist. Therefore, when the two divided parts are combined at the connecting portion, the claw portion for connection and the receiving portion on which the claw portion is hooked are not easily deformed. Therefore, not only is the labor of joining the two divided bodies troublesome, but there is a problem that an excessive load is applied to the claw portion and the like, and cracks and breakage are liable to occur if it is forced to deform.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to facilitate the deformation of the engaged portion provided on the connecting wall between the intake duct and the resonator when the engaging portion and the engaged portion are engaged. An object of the present invention is to provide an air intake duct device capable of suppressing the possibility of cracks and breakage due to a load.

In order to achieve the above object, the present invention includes an intake duct connected to an air inlet of a housing and a resonator having an introduction duct connected to an opening of the housing, and the intake duct and the resonator are connected to a connecting wall. And the intake duct and the resonator are divided into two parts, respectively, and the divided parts are coupled by respective engagement of a plurality of elastically deformable claw parts and a plurality of engaged parts. in the intake duct device configured as, provided with a portion of the plurality of engaged portions to the connecting wall, in its connecting wall, to facilitate the deformation of the engaged portion provided on said connecting wall only set the deformation promotion portion of the width of the claw portion engaged with the engaged portion provided in the connecting wall and formed to be narrower than the width of the claw portion engaged with the other engaged portion It is characterized by

  Therefore, in the intake duct device of the present invention, when the divided body is assembled, when the engaged portion provided on the connecting wall between the intake duct and the resonator is engaged with the corresponding claw portion, As the portion is deformed, the engaged portion is also deformed by the deformation promotion by the deformation promotion portion. Therefore, an excessive load is not applied to the nail part, and the possibility that the nail part is cracked or damaged can be suppressed.

Moreover, the said structure WHEREIN: The said deformation | transformation promotion part is good to comprise by the thin part of a connection wall.
Moreover, the said structure WHEREIN: The said deformation | transformation promotion part is good to comprise with the slit of a connection wall.

  As described above, according to the present invention, when the engaging portion and the engaged portion are engaged, the deformation of the engaged portion provided on the connection wall between the intake duct and the resonator can be promoted. It is possible to exert an effect that it is possible to suppress the possibility of causing cracks and breakage by applying an excessive load to the claw portion.

An exploded plan view showing an intake duct device and an air cleaner device of an embodiment. The top view which expands and shows the intake duct apparatus of FIG. The front view of the air intake duct apparatus of FIG. The front view which decomposes | disassembles and shows the intake duct apparatus of FIG. The top view of the 1st division body in the air intake duct apparatus of FIG. The expanded sectional view in the 6-6 line of FIG. FIG. 7 is a partially enlarged cross-sectional view taken along line 7-7 in FIG. FIG. 8 is a partial enlarged cross-sectional view taken along line 8-8 in FIG. FIG. 9 is a partial enlarged cross-sectional view taken along line 9-9 in FIG. (A)-(c) is a fragmentary sectional view which shows the state at the time of the coupling | bonding of the division body in the coupling | bonding structure of FIGS. The partial top view which expands and shows the connection part of the inlet of an intake duct with respect to the air inlet_port | entrance and opening of a housing, and the connection port of a resonator. Sectional drawing in the 12-12 line | wire of FIG. The fragmentary sectional view in the 13-13 line of FIG. Sectional drawing which shows the example of a change. Sectional drawing which shows another modification.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention are described below with reference to the drawings.
As shown in FIG. 1, in a cleaner housing (hereinafter simply referred to as a housing) 22 of an air cleaner device 21, a filter 23 is disposed between a first case 22A and a second case 22B that constitute the housing 22. ing. An air inlet 24 and an opening 25 are juxtaposed on the wall of the first case 22 </ b> A that is upstream of the filter 23 so as to be positioned on parallel axes. As shown in FIG. 12, the air inlet 24 is formed by a pair of arc portions 24a and a pair of parallel portions 24b so as to form a cylindrical shape having a substantially oval cross section. The opening 25 is formed so as to form a cylindrical shape having a circular cross section, and is disposed so as to be biased toward and close to one end of one of the parallel portions 24b. An air outlet 26 connected to an intake system (not shown) of the engine is formed in the wall portion of the second case 22B on the downstream side of the filter 23. A plurality of fixing seats 27 for fixing the air cleaner device 21 to a mounting portion (not shown) in the engine room of the vehicle by bolts or the like are provided at the outer lower portion of the housing 22.

  As shown in FIGS. 1 to 3, an intake duct device 30 connected to the air cleaner device 21 includes an intake duct 31 having a substantially elliptical cross section and a resonator 32 having a hollow box shape. . The intake duct 31 and the resonator 32 are integrated in an adjacent state via a connecting wall 33 provided between them. A connection port 34 that is inserted into the air inlet 24 of the housing 22 and connected thereto is provided at the end of the intake duct 31. The connection port 34 has a similar shape to the air inlet and has a pair of arc portions 34a and a pair of parallel portions 34b. On the outer surface of the resonator 32, a cylindrical introduction duct 35 having a circular cross section is inserted and connected to the opening 25 of the housing 22 so as to extend along an axis parallel to the axis of the connection port 34. ing.

  As shown in FIGS. 3 to 5, the intake duct 31 and the resonator 32 of the intake duct device 30 are divided into upper and lower parts in FIG. 3. That is, the intake duct 31 and the resonator 32 include a first divided body 36 </ b> A composed of a lower portion of the intake duct 31 and a lower portion of the resonator 32 integrally connected via the connecting wall 33, and an upper portion of the intake duct 31. The duct side second divided body 36 </ b> B as a part and the resonator side second divided body 36 </ b> C as an upper part of the resonator 32 are configured. The first divided body 36A and the duct side second divided body 36B constitute the intake duct 31, and the first divided body 36A and the resonator side second divided body 36C constitute the housing of the resonator 32. The annular connection port 34 of the intake duct 31 and the annular introduction duct 35 of the resonator 32 are integrally formed on the first divided body 36A side. A plurality of fixing seats 37 for fixing the intake duct device 30 in the engine room of the vehicle with bolts or the like project from the outside of the lower portion of the resonator 32 in the first divided body 36A.

  As shown in FIGS. 5 to 7, a protrusion 38 is formed along the extending direction of the edge at the edge of the upper end opening of the first divided body 36 </ b> A. A receiving groove 39 that can be fitted onto the protrusion 38 is formed along the extending direction of the edge at the edge of the lower end opening of the duct-side second divided body 36B and the resonator-side second divided body 36C. Then, by fitting the protrusion 38 and the receiving groove 39, the first divided body 36A, the duct side second divided body 36B, and the resonator side second divided body 36C are coupled in an almost airtight state at their opening edges. The

  As shown in FIGS. 2 and 6, outside the edge of the upper end opening of the first divided body 36 </ b> A, a plurality of receiving portions 40 as engaged portions having a substantially rectangular frame shape are spaced apart from each other. A hooked portion 40 a is formed inside the receiving portion 40. A receiving portion 40 is also provided on the connecting wall 33 between the intake duct 31 and the resonator 32.

  As shown in FIG. 8, on the outer side of the edge of the lower end opening of the duct side second divided body 36B and the resonator side second divided body 36C, the hooked portion 40a of the receiving portion 40 is hooked from the inner side. A plurality of elastically deformable claw portions 41 that are stopped are formed to protrude downward with a mutual interval therebetween. And each nail | claw part 41 is latched from the inner side with respect to the to-be-latched part 40a of the receiving part 40, The 1st division body 36A, the duct side 2nd division body 36B, and the resonator side 2nd division body 36C, Is locked into a combined state. The portion corresponding to each receiving portion 40 on the outside of the first divided body 36 </ b> A is for restricting the deformation of the claw portion 41 at the latching position in order to make it difficult to remove the claw portion 41 from the receiving portion 40. A restricting portion 42 is projected.

  As shown in FIG. 2 to FIG. 4 and FIG. 9, on the outside of the edge of the lower end opening of the duct side second divided body 36B and the resonator side second divided body 36C, At an intermediate position, a plurality of projecting pieces 43 serving as constraining portions are formed so as to project downward, and a guide surface 43a made of an inclined surface is formed on the inner side surface thereof. Then, as shown in FIG. 10A, when the first divided body 36A, the duct side second divided body 36B, and the resonator side second divided body 36C are coupled, the claw portion 41 is elastically deformed inward while the receiving portion When hooked on 40, as shown in FIG. 10C, the projecting piece 43 comes into contact with the outer surface of the first divided body 36A while being guided by the guide surface 43a. Due to this contact, as shown in FIG. 10B, the wall portions of the duct side second divided body 36 </ b> B and the resonator side second divided body 36 </ b> C are deformed inward when the claw portion 41 is latched to the receiving portion 40. Therefore, the positional deviation between the protrusions 38 and the receiving grooves 39 of the opposing divided bodies 36A, 36B, and 36C does not occur.

  As shown in FIG. 5 and FIG. 6, the receiving portion as an engaged portion provided adjacent to the connection wall 33 between the vicinity of the connection port 34 of the intake duct 31 and the vicinity of the introduction duct 35 of the resonator 32. Between the parts 40, the thin part 44 which comprises a deformation | transformation promotion part is formed. And when the claw part 41 is latched with respect to each receiving part 40 on the connection wall 33, the deformation | transformation of each receiving part 40 is promoted by this thin part 44. FIG.

  Further, as shown in FIG. 11, among the plurality of claws 41 provided in the duct-side second divided body 36B and the resonator-side second divided body 36C, they are provided on both sides in the vicinity of the introduction duct 35 of the resonator 32. The width W1 of the pair of claw portions 41A is formed to be narrower than the width W2 of the other claw portions 41B, and the claw portions 41A are configured to be more easily elastically deformed than the other claw portions 41B. Has been.

  As shown in FIGS. 11 to 13, a plurality of slits 48 are formed in the peripheral wall of the connection port 34 of the intake duct 31 so as to be spaced apart in the circumferential direction and to extend in parallel in the axial direction. A pair of retaining portions 49 each including a claw portion project from the tip of the plate-like portion 34 c between the pair of slits 48 of the pair of parallel portions 34 b of the connection port 34. Then, in a state where the connection port 34 of the intake duct 31 is inserted into the air inlet 24 of the housing 22, the retaining portion 49 is engaged with the inner peripheral edge of the air inlet 24, so that the connection port 34 is The retainer 24 is held against the retainer.

  As shown in FIGS. 11 to 13, on the outer peripheral surface of the introduction duct 35 of the resonator 32, a plurality of rattling prevention portions 50 made of ridges are spaced in the circumferential direction and extend in parallel in the axial direction. Is formed to protrude. These rattling prevention parts 50 have a wedge shape in which the height increases toward the base end side of the introduction duct 35. Then, in a state where the introduction duct 35 of the resonator 32 is fitted in the opening 25 of the housing 22, these rattling prevention portions 50 are pressed against the inner peripheral surface of the opening 25, thereby the introduction duct 35 and the opening 25. The play between the two is prevented. The angular vertex of the rattling prevention unit 50 is located in the middle of the opening 25 in the length direction (vertical direction in FIG. 11).

  As shown in FIGS. 11 to 13, a flat portion 51 is formed in the arc portion of the upper peripheral wall of the connection port 34 of the intake duct 31. As shown in FIGS. 3 and 4, a flat portion 52 corresponding to the flat portion 51 of the connection port 34 is formed in the circular arc portion of the upper peripheral wall of the air inlet 24 of the housing 22. On the outer peripheral surface of the connection port 34, a plurality of engagement pieces 53 made of protrusions are formed so as to extend along both side edges of each slit 48. These engaging pieces 53 have a wedge shape whose height increases toward the base end side of the connection port 34.

  Then, in a state where the connection port 34 of the intake duct 31 is fitted to the air inlet 24 of the housing 22, both the plane portions 51 and 52 are joined to each other, so that as shown in FIG. The rotation of the connecting port 34 around the center C is restricted, and the rotational load is received at the joint portion between the flat portions 51 and 52. Further, in a state where the connection port 34 is fitted to the air inlet 24, each engagement piece 53 is pressed against the inner peripheral surface of the air inlet 24 to prevent rattling between the connection port 34 and the air inlet 24. It has come to be.

Next, a method for assembling the air cleaner device configured as described above will be described.
First, the first and second divided bodies 36A to 36C shown in FIG. 4 are molded by injection molding. Then, the second divided bodies 36B and 36C are assembled to the first divided body 36A. That is, as shown in FIGS. 7, 8, and 10 (a) and 10 (b), the claw portion 41 is hooked on the hooked portion 40 a inside the receiving portion 40 while being elastically deformed inward, and the receiving groove 39 At this time, as shown in FIG. 10C, the protruding piece 43 is brought into contact with the outer surface of the first divided body 36A. Due to this contact, as shown in FIG. 10B, even when the claw portion 41 is deformed inward, deformation of the edge portions of the second and second resonator-side second divided bodies 36B and 36C is constrained. Therefore, there is no possibility that the first and second divided bodies 36A, 36B, and 36C are displaced from each other, and the first and second divided bodies 36A and 36B, 36C are prevented from being displaced. Are properly combined.

  In addition, as shown in FIG. 5, between the receiving portion 40 provided adjacent to the connection wall 33 between the vicinity of the connection port 34 of the intake duct 31 and the vicinity of the introduction duct 35 of the resonator 32, A thin portion 44 is formed. When the claw portion 41 is engaged with each receiving portion 40 on the connecting wall 33 while being elastically deformed, the rigidity around the receiving portion 40 is increased due to the presence of the introduction duct 35, the connecting port 34, and the connecting wall 33. Even if it is high, the deformation of each receiving portion 40 is promoted by the thin portion 44, and the possibility that the claw portion 41 is cracked or damaged is prevented.

  Furthermore, as shown in FIG. 11, the width W1 of the pair of claw portions 41A provided on both sides in the vicinity of the introduction duct 35 of the resonator 32 is formed to be narrower than the width W2 of the other claw portions 41B. . For this reason, when the claw portion 41A in the vicinity of the introduction duct 35 is engaged with the receiving portion 40 while being elastically deformed, the rigidity around the claw portion 41 is high due to the presence of the introduction duct 35, the connection port 34, and the connection wall 33. Even when it is difficult to deform the claw portion 41A and its periphery, the claw portion 41A is easily elastically deformed and engaged with the receiving portion 40.

  The intake duct device 30 assembled as described above is assembled to the housing 22 of the air cleaner. That is, as shown in FIG. 11, the connection port 34 of the intake duct 31 is fitted to the air inlet 24 of the housing 22, and the introduction duct 35 of the resonator 3 is fitted to the opening 25 of the housing 22.

  In this state, the connecting port 34 is held against the air inlet 24 by engaging the retaining portion 49 at the tip of the connecting port 34 with the inner peripheral edge of the air inlet 24. In addition, the engagement piece 53 on the outer peripheral surface of the connection port 34 is pressed against the inner peripheral surface of the air inlet 24 to prevent the connection port 34 from rattling.

  On the other hand, in this state, the rattling prevention portion 50 of the introduction duct 35 of the resonator 32 is pressed into the inner peripheral surface of the opening 25 so that the rattling between the introduction duct 35 and the opening 25 occurs. It is prevented and the introduction duct 35 from the opening 25 is prevented from coming out.

  In this state, the planar portions 51 and 52 of the connection port 34 and the air inlet 24 are joined to each other by planar contact. For this reason, as shown in FIG. 12, the rotational load is received at the joint portion of the flat portions 51 and 52, and the rotation of the portion of the connection port 34 around the axis of the introduction duct 35 is restricted.

Next, the operation of the air cleaner device assembled as described above will be described.
The air cleaner device 21 of this embodiment is mounted in an engine room in a state where the air outlet 26 is connected to an engine connection port. When the engine is operated in this state, outside air is taken into the housing 22 through the intake duct 31 and the air inlet 24. The air is filtered by the filter 23 and supplied to the engine through the air outlet 26.

  Further, the intake sound from the engine is introduced into the housing 22, and among the intake sounds, the intake sound having a frequency in a specific region is introduced into the resonator 32 from the introduction duct 35 and canceled by the resonance action. Therefore, from the opening at the front end of the intake duct 31, a quiet or noise-adjusted intake sound from which noise in a specific frequency region is removed is diffused.

  When the engine is operated, vibrations of the engine and the vehicle traveling are applied to the air cleaner device. The first divided body 36A and the second and resonator-side second divided bodies 36B and 36C are provided with a protrusion 38 and a receiving groove 39. And are properly mated. Further, the housing 22 and the intake duct device 30 are prevented from rattling or relative movement between the air inlet 24 and the connection port 34 and between the opening 25 and the introduction duct 35. Therefore, it is possible to prevent the air cleaner device 21 from resonating or generating noise.

According to this embodiment, the following effects can be obtained.
(1) The connection port 34 of the intake duct 31 is provided with a retaining portion 49 for performing a retaining function from the air inlet 24. The introduction duct 35 is provided with a backlash preventing portion 50 for preventing backlash between the opening 25 and the introduction duct 35. For this reason, when the connection port 34 and the introduction duct 35 of the intake duct 31 and the resonator 32 that are integrated with each other are fitted into the air inlet 24 and the opening 25 of the housing 22, the retaining portion 49 on the intake duct 31 side. Thus, the connection port 34 is prevented from coming off from the air inlet 24. At the same time, rattling between the introduction duct 35 and the opening 25 is prevented by the rattling prevention unit 50 on the resonator 32 side. Therefore, the integrated intake duct 31 and the connecting port 34 of the resonator 32 and the introducing duct 35 can be connected to the air inlet 24 and the opening 25 of the housing 22 without looseness in a state of being prevented from coming off. Moreover, since the retaining function by the retaining part 49 and the rattling preventing function by the rattling preventing part 50 are shared by the connection port 34 side of the intake duct 31 and the introduction duct 35 side of the resonator 32, Compared to the case where both the connection port 34 and the introduction duct 35 have both functions, the structure of the intake duct device 30 can be simplified.

  (2) A plurality of slits 48 extending in the axial direction are formed in the connection port 34 of the intake duct 31, and a retaining portion 49 is formed at the tip of the plate-like portion 34 c formed by each slit 48. For this reason, when the base end portion is inserted into the air inlet 24, the plate-like portion 34c bends, so that the connection port 34 can be inserted into the air inlet 24 with a small force.

  (3) Since an engagement portion 53 is formed at the connection port 34 of the intake duct 31 as a rattling-preventing portion pressed against the inner peripheral surface of the air inlet 24, the connection port 34 and the air inlet 24 The backlash can be prevented even during the interval.

  (4) Since the rattling-preventing portion 50 of the introduction duct 35 is configured by a wedge-shaped protrusion that extends in the axial direction of the introduction duct 35 and whose top portion becomes higher toward the proximal end side of the introduction duct 35, The rattling prevention part 50 bites into the inner peripheral surface of the opening 25. Therefore, the rattling prevention becomes more reliable, and the rattling prevention portion 50 also exerts an action to prevent the introduction duct 35 from coming off. In addition, since the angular apex of the rattling prevention portion 50 is located at the intermediate portion in the length direction of the opening 25, the introduction duct 35 is appropriately prevented from coming out of the opening 25 outward.

  (5) Since the flat portions 51 and 52 are formed at the tops of the arc portions of the air inlet 24 and the connection port 34, the connection port 34 is connected in the air inlet 24 even if the introduction duct 35 has a circular cross section. Rotation around the axis of the mouth 34 and backlash can be suppressed. That is, since the resonator 32 is fixed at the fixed seat 37 on the outer periphery thereof, and the opening 25 and the introduction duct 35 are circular in cross section, the intake duct device 30 includes the shafts of the opening 25 and the introduction duct 35 shown in FIG. A rotational force in the direction of the arrow about the center C or in the opposite direction acts. Here, when the flat portions 51 and 52 are not formed in the opening 25 and the introduction duct 35, in particular, there is a dimensional tolerance between the air inlet 24 and the connection port 34 and between the opening 25 and the introduction duct 35. If they are synergized without being offset, the rotational force may cause a slip between the air inlet 24 and the connection port 34, and a relative rotation may occur between them. However, the opening 25 and the introduction duct 35 are in a position displaced toward the end of the parallel portions 24b and 34b with respect to the air inlet 24 and the connection port 34, and the flat portions 51 and 52 are separated from the opening 25 and the introduction duct 35. Therefore, the relative rotation is suppressed. Therefore, it is possible to prevent the occurrence of rattling and abnormal noise.

  (6) Since the parallel portions 24b and 34b are formed in the air inlet 24 and the connecting port 34, the rotation of the connecting port 34 with respect to the air inlet 24 due to the twist of the introduction duct 35 or the like is suppressed. Accordingly, it is possible to prevent the occurrence of rattling and abnormal noise as described above.

  (7) The edges of the duct-side and resonator-side second divided bodies 36B and 36C are located inside the duct-side and resonator-side second divided bodies 36B and 36C by engagement with the first divided body 36A. The protrusion piece 43 which restrains deform | transforming into is provided. Therefore, it is possible to prevent the positional deviation between the protrusions 38 provided on the opposing edge portions of the divided bodies 36A to 36C and the receiving grooves 39, resulting in poor coupling of the divided bodies 36A to 36C. And can be assembled easily.

  (8) Since the restricting portion 42 for restricting the inward movement of the claw portion 41 is provided outside the first divided body 36A, the first divided body 36A, the duct side, the resonator side second divided body 36B, Even if a maintenance worker or the like presses the claw portion 41 in the coupled state with the 36C, the claw portion 41 can be prevented from being detached from the receiving portion 40.

(9) Since the guide surface 43a which consists of an inclined surface is formed in the inner surface of the said protrusion piece 43, fitting with the protrusion 38 and the receiving groove 39 can be easily performed even if groping.
(10) The connecting wall 33 is provided with a deformation promoting portion for facilitating the deformation of the receiving portion 40 with which the claw portion 41 for connecting the divided bodies 36A, 36B, 36C is engaged. Therefore, an excessive load is not applied to the claw portion 40 when the claw portion 41 is latched to the receiving portion 40, and the possibility that the claw portion 41 is cracked or damaged can be suppressed. The deformation promoting portion is constituted by the thin portion 44 of the connecting wall 33. For this reason, the structure of the deformation assisting portion is simple, and the deformation of the receiving portion 40 is effectively promoted even if the periphery of the receiving portion 40 is highly rigid due to the presence of the connecting wall 33, the introduction duct 35, and the like. be able to.

  (11) The width W1 of the claw portion 41A provided on both sides of the resonator 32 in the vicinity of the introduction duct 35 is formed to be narrower than the width W2 of the other claw portion 41B, and the claw portion 41A is easily elastically deformed. It is comprised so that it may become. For this reason, even if the periphery of the claw portion 41A is highly rigid due to the presence of the introduction duct 35 and the like, the claw portion 41A is easily deformed, and the claw portion 41A can be easily latched to the receiving portion 40. .

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
As shown in FIG. 14, inclined surfaces 46 and 47 are formed on the opposing surfaces between the protrusions 38 of the first divided body 36A and the receiving grooves 39 of the duct-side second divided body 36B and the resonator-side second divided body 36C. Forming. In the case of such a configuration, the protrusion 38 and the receiving groove 39 can be smoothly engaged by the guiding action of the inclined surfaces 46 and 47 when the divided bodies 36A to 36C are joined and assembled. In addition, when vehicle vibration or the like is transmitted to the divided bodies 36A to 36C in a combined assembly state, slip occurs between the inclined surfaces 46 and 47 between the protrusion 38 and the receiving groove 39, which may cause collision noise. Can be suppressed.

As shown in FIG. 15, a slit 45 is formed in the connecting wall 33 as a deformation promoting portion instead of the thin portion 44 of the above embodiment.
The plane portions 51 and 52 between the air inlet 24 and the connection port 35 are respectively provided at the tops of the two arc portions.

  The air inlet 24 and the connecting port 35 are formed in a shape in which the pair of parallel portions 24b and 34b are not formed, for example, an elliptical shape or a substantially elliptical shape, or a rounded rectangular shape having the parallel portions 24b and 34b. To do. When the air inlet 24 and the connection port 35 are elliptical or substantially elliptical, flat portions 51 and 52 are formed at the end of the major diameter portion.

  DESCRIPTION OF SYMBOLS 21 ... Air cleaner apparatus, 22 ... Housing, 24 ... Air inlet, 25 ... Opening, 30 ... Intake duct apparatus, 31 ... Intake duct, 32 ... Resonator, 33 ... Connection wall, 34 ... Connection port, 36A ... 1st division body, 36B ... Duct side second divided body, 36C ... Resonator side second divided body, 40 ... Receiving portion as engaged portion, 41 ... Claw portion, 44 ... Thin wall portion constituting deformation promoting portion as deformation promoting portion, 47: A slit constituting the deformation promoting portion.

Claims (3)

An intake duct connected to the air inlet of the housing, and a resonator having an introduction duct connected to the opening of the housing, wherein the intake duct and the resonator are integrated adjacently via a connecting wall, and the intake duct and In the intake duct device configured to divide each of the resonators into two parts and to connect the divided bodies by respective engagements of a plurality of claw portions and a plurality of engaged portions that can be elastically deformed ,
Provided with a part of the plurality of engaged portions to the connecting wall, in its connecting wall, it sets the deformation promotion portion for promoting the deformation of the engaged portion provided in the connecting wall,
An intake duct device characterized in that a width of a claw portion engaged with an engaged portion provided on the connecting wall is narrower than a width of a claw portion engaged with another engaged portion. . The intake duct device according to claim 1, wherein the deformation promoting portion is formed by a thin portion of a connecting wall. The intake duct device according to claim 1, wherein the deformation promoting portion is formed by a slit of a connection wall.