JP2010095244A - Ram duct unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ram duct unit that can reduce the number of components and assembling man-hours. <P>SOLUTION: The ram duct unit 34 is mounted at the front part of a vehicle body frame 1 of a motorcycle. The ram duct unit is configured by integrally molding the following components by a resin, that is, a ram duct 36 that takes in intake air supplied from a front air intake port 24 to an engine E, a pair of right and left stays 40 that supports a pair of right and left side mirrors 38, and a bracket 44 that supports a meter unit 42 for displaying a vehicle speed and the number of revolutions of the engine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ram duct unit attached to a front portion of a motorcycle.

  In a motorcycle equipped with a so-called ram air type intake device in which an air intake port for taking combustion air into the engine is opened at the front end of the vehicle body, a ram duct is provided in front of the head pipe, and a stay or bracket is provided on the ram duct. A side mirror, a meter, and the like are attached via (Patent Document 1).

JP 2005-313899 A

  However, in Patent Document 1, since the ram duct, the side mirror stay, and the meter bracket are provided separately, the number of parts increases, and the assembly man-hour increases accordingly.

  The present invention has been made in view of the above problems, and an object thereof is to provide a ram duct unit that can reduce the number of parts and the number of assembly steps.

  In order to achieve the above object, a ram duct unit according to the present invention is a ram duct unit attached to the front part of a body frame of a motorcycle, and supports a ram duct that takes in intake air into the engine and a side mirror. The stay and the bracket that supports the meter unit are integrally formed of resin.

  According to this configuration, the ram duct for taking in air, the side mirror stay, and the meter support bracket are integrally formed, so that the number of parts can be reduced, thereby reducing the number of assembly steps. Can do. In addition, since the whole is molded integrally while reducing the weight by using resin, it is possible to secure the required strength by increasing the overall rigidity, and to prevent the sound transmission through the flat part by increasing the rigidity. The effect can be enhanced.

  In the present invention, the meter mounting surface of the bracket faces obliquely rearward, the side mirror mounting surface of the stay is located on the side of the meter mounting surface and faces obliquely forward, and the meter mounting surface of the bracket From the stay to the side mirror mounting surface of the stay, the stay back surface is preferably formed with a substantially flat continuous surface. In that case, the meter mounting surface of the bracket can be fan-shaped in plan view. According to this configuration, since the meter mounting surface facing diagonally rear and the side mirror mounting surface facing diagonally forward are connected by a substantially flat continuous wall, there is no dent behind the side mirror mounting surface. As a result, the volume of the ram duct unit is increased, so that the rigidity of the ram duct unit is increased and a strong support of the meter unit and the side mirror is achieved.

  In the present invention, it is preferable that a reinforcing rib is provided on the back surface of the bracket. According to this configuration, the meter and the side mirror are supported more firmly.

  In the present invention, it is preferable that a lamp support portion to which the headlamp is attached is integrally formed. According to this configuration, the number of parts can be further reduced, and the number of assembly steps can be reduced.

  In the present invention, it is preferable that a hook for fixing a harness connected to the meter is integrally formed. According to this configuration, the number of parts and the number of assembly steps can be further reduced.

  In the present invention, it is preferable that a resonator chamber for further reducing intake noise is integrally formed. According to this configuration, the number of parts and the number of assembly steps can be further reduced, and the volume of the resonator chamber can be easily increased.

  According to the ram duct unit of the present invention, since the ram duct, the side mirror stay, and the meter support bracket are integrally formed, the number of parts can be reduced, thereby reducing the assembly man-hours. it can. Moreover, since the whole is integrally molded while reducing the weight by the resin, it is possible to increase the overall rigidity and ensure the required strength, and to enhance the sound absorption effect due to the increased rigidity.

1 is a side view of a motorcycle including a ram duct unit according to a first embodiment of the present invention. It is a front view of a motorcycle same as the above. It is a side view around a ram duct unit same as the above. It is a disassembled perspective view around a ram duct unit same as the above. It is a side view of a ram duct unit same as the above. It is a top view of the upper unit half of the same ram duct unit. It is VII-VII sectional drawing of FIG. (A) is a top view of the lower unit half of the same ram duct unit, and (b) is a front view of the lower unit half. It is the longitudinal cross-sectional view which a partially broken ram duct unit same as the above.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a motorcycle including a ram duct unit according to an embodiment of the present invention. In this motorcycle, a front fork 4 is pivotally supported by a head pipe 3 integrally formed with a head block 2 at the front end of a body frame 1 via a steering shaft (not shown). Wheels 7 are attached. On the other hand, a swing arm 9 is pivotally supported on a swing arm bracket 8 at the center lower part of the body frame 1 so as to swing up and down, and a rear wheel 10 is attached to the swing arm 9. An engine E is attached to the center lower portion of the vehicle body frame 1. The engine E drives a rear wheel 10 via a chain (not shown), and a handle 12 fixed to the steering shaft and the upper end of the front fork 4. It is configured to steer. A fuel tank 13 is disposed on the main frame 11 of the body frame 1.

  A seat rail 14 and a reinforcing rail 14a constituting the rear portion of the vehicle body frame 1 are attached to the rear portion of the main frame 11, and a driver's seat 17 and a passenger seat 21 are mounted on the seat rail 14. A resin cowling 19 that covers a portion from the front of the handle 12 to the side of the front portion of the vehicle body is attached to the front portion of the vehicle body.

  FIG. 2 is a schematic front view of the motorcycle. The cowling 19 has a pair of left and right openings 22 and 23 facing the headlamp unit 20 and an engine E (see FIG. 1) located above the openings 22 and 23. The air intake port 24 for taking in the combustion air to) is formed.

  As shown in FIG. 3, the head block 2 is formed by integrally forming a suction duct portion 33 having an open front end and the head pipe 3 by casting. The resin-made ram duct unit 34 of the present invention is connected to the front end portion of the suction duct portion 33, and the ram duct unit 34 is arranged with the front end opening thereof facing the air intake port 24 of the cowling 19, The rear part is connected to the head block 2 by a fastening member 80 such as a bolt. An air cleaner 25 is connected to the rear end of the head block 2. The traveling wind A passes from the air intake 24 through the ram duct unit 34 and the suction duct portion 33, is purified by the air cleaner 25 to become clean air CA, and is introduced into the engine E (FIG. 1).

  FIG. 4 is an exploded perspective view around the ram duct unit 34. As shown in the figure, the ram duct unit 34 includes a ram duct 36 that takes in the intake air to the engine E, a stay 40 that supports the side mirror 38, and instruments such as a speedometer and an engine tachometer. A bracket 44 for supporting the meter unit 42, a lamp support piece 46 to which the headlamp unit 20 is attached, and a resonator box 49 for forming a resonator chamber 48 for reducing intake noise are integrally formed of resin. Yes. The headlamp unit 20 includes, for example, a pair of left and right headlamps and a position lamp.

  FIG. 5 is a side view of the ram duct unit 34. As shown in the figure, the ram duct unit 34 is an upper and lower split mold product composed of an upper unit half 35 and a lower unit half 37. The upper unit half 35 is provided with the stay 40 and a bracket. 44, and a lamp support piece 46 and a resonator box 49 are formed in the lower unit half 37. The resonator box 49 protrudes downward, and a protrusion 51 is integrally formed on the outer front end surface thereof. The immobilizer amplifier 50 is detachably attached to the protrusion 51.

  In this embodiment, the upper unit half body 35 and the lower unit half body 37 are fastened by ten tapping screws 82 that are fastening members. At the front end of the ram duct 36, a screen 26, which is a wire mesh for preventing foreign matter entry, is attached. Further, tabs 52 and 54 are integrally formed at the rear ends of the upper unit half 35 and the lower unit half 37, respectively, and the fastening member 80 (FIG. 3) is inserted into the tabs 52 and 54. Bolt insertion holes 52a and 54a are provided.

  The meter bracket 44 has a meter mounting surface 44a facing diagonally backward, that is, toward the rider, and the side mirror stay 40 has a side mirror mounting surface 40a facing diagonally forward. As shown in FIG. 6, which is a plan view of the upper unit half 35, the bracket 44 and the stay 40 are connected by a substantially flat continuous wall. That is, the rear part of the side mirror stay 40 is inflated upward, and as shown in FIG. 7, the meter mounting surface 44a facing obliquely rearward and the stay rear surface 43 connected to the side mirror mounting surface 40a facing diagonally forward are smooth. It is a continuous surface formed by the walls 47 continuously connected to each other. Thereby, the volume of the ram duct unit 34 is increased and the rigidity is increased, so that the meter unit 42 and the side mirror 38 of FIG. 4 can be firmly attached.

  That is, from the viewpoint of visibility, the meter unit 42 is provided at the center in the left-right direction of the vehicle body from the rear (side closer to the rider), and the left and right side mirrors 38 are forward of the meter unit 42 on both sides of the vehicle body in the left-right direction. Provided. Therefore, since the side mirror mounting surface 40a is also positioned forward of the meter mounting surface 44a, the rear side of the side mirror mounting surface 40a, that is, the side of the meter mounting surface 44a is usually recessed downward. On the other hand, in this embodiment, there is no dent to the meter mounting surface 44a in FIG. 7 located at the center of the vehicle body and the stay rear surface 43 that is the rear portion of the side mirror mounting surface 40a located on both sides in the left-right direction. Since it is formed by continuously connecting surfaces, the surplus portion 45 shown by hatching in FIG. 6 is formed, the volume of the ram duct unit 34 is increased, and the rigidity is improved accordingly. Thus, by forming the surplus portion 45, the meter mounting surface 44a has a fan shape in plan view. In addition, the meter unit 42 and the side mirror 38 can be supported more firmly by providing the reinforcing rib 53 on the back surface on the lower front side of the bracket 44 shown in FIG.

  A plurality of meter mounting holes 56A to 56C are formed on the meter mounting surface 44a of the bracket 44 shown in FIG. In the present embodiment, there are three meter mounting holes 56A to 56C, but the number of meter mounting holes 56A to 56C is not limited to this. A concave portion 44b for allowing the meter harness to pass therethrough is formed in the central portion of the front end of the meter mounting surface 44a, and an elastic member 84 (FIG. 4) such as a damper for stabilizing the meter unit 42 is inserted in the vicinity of the concave portion 44b. The projection 58 formed with the insertion hole 58a is integrally formed. The side mirror mounting surfaces 40a of the pair of left and right stays 40 are respectively formed with positioning projections 60 and screw holes 62 into which fastening members 86 (FIG. 4) such as bolts are screwed. Further, not only the meter harness but also a coupler provided in the harness terminal or the meter unit 42 can be disposed in the recess 44b.

  FIG. 8A is a plan view of the lower unit half body 37, and FIG. 8B is a front view of the lower unit half body 37. An opening 48a of the resonator chamber 48 formed integrally with the lower part of the lower unit half is closed by a separate cover 64 having a communication pipe 64a. A drain hole 55 is formed in the bottom wall of the resonator chamber 48. The mounting surfaces 46a of the pair of left and right lamp support pieces 46 that support the headlamp 20 (FIG. 4) face substantially forward, and have bolt insertion holes 66 for mounting the headlamp 20. Using the bolt insertion hole 66, the headlamp 20 (FIG. 4) and the cowling 19 (FIG. 1) may be fastened together. A hook 70 for fixing a harness (not shown) connected to the meter unit 42 (FIG. 4) is integrally formed on the right side of the front end of the lower unit half 37. The position where the hook 70 is formed is not limited to the illustrated location.

  As shown in FIG. 9, which is a partially broken longitudinal sectional view of the ram duct unit 34, a sound absorbing material 57 for suppressing intake noise of ram air is provided on the inner surfaces of the upper unit half body 35 and the lower unit half body 37. Is provided. A cylindrical resin holder 72 is disposed inside the sound absorbing material 57 and is fixed by pressing the sound absorbing material 57 against the ram duct unit 34. However, the fixing method of the sound absorbing material 57 is not limited to this.

  Next, the assembly procedure of the ram duct unit 34 will be described. First, the opening 48 a of the lower unit half body 37 is closed with the cover 64. Next, the sound absorbing material 57 is affixed to the inner surfaces of the upper unit half body 35 and the lower unit half body 37 and pressed by the resin holder 72 to fix the sound absorbing material 57. Furthermore, the upper unit half body 35 and the lower unit half body 37 are stacked one above the other so that the screen 26 is sandwiched between the front ends, and are fastened by the tapping screw 82.

  The meter unit 42 shown in FIG. 4 is attached to the ram duct unit 34 assembled in this way. In the meter unit 42, an elastic member 88 such as a grommet is fitted in the two left and right meter mounting holes 56A and B shown in FIG. It is attached to the bracket 44 by a fastening member (not shown) such as a bolt screwed into the bracket 44. The elastic members 88 and 84 are attached to the other meter mounting hole 56C and the insertion hole 58a, and the back surface of the meter unit 42 is pressed against the elastic members 88 and 84 to prevent the meter unit 42 from shaking. The meter harness is connected to the meter unit 42 through the recess 44b.

  Returning to FIG. 4, in the side mirror 38, the fastening member 86 is screwed into the screw hole 62 in a state where the positioning projection 60 of the stay 40 is engaged with an engagement hole (not shown) provided in the side mirror 38. And screwed onto.

  The headlamp 20 is screwed into a clamping nut 92 of the headlamp 20 by inserting a fastening member 94 such as a bolt into a mounting hole (not shown) of the headlamp 20 and a bolt insertion hole 66 of the lamp support piece 46. It is attached with. When the headlamp 20 and the cowling 19 are fastened together in the ram duct unit 34, a fastening member 94 such as a bolt is inserted into the bolt insertion hole 66 of the ram duct unit 34 and the mounting hole (not shown) of the headlamp 20. And screwed into a pinch nut provided on the cowling 19. In the present embodiment, the upper portion of the headlamp 20 is supported by the lamp support piece 46, and the lower portion is supported by the cowling 19 by a separate support means.

  The ram duct unit 34 is attached to the head block 2 by inserting and fastening the fastening member 80 (FIG. 3) into the bolt insertion holes 52a and 54a and the screw hole 2a of the head block 2.

  In the above configuration, since the ram duct 36, the stay 40 for supporting the side mirror 38, and the bracket 44 for supporting the meter unit 42 are integrally formed, it is possible to reduce the number of parts, thereby reducing the number of assembly steps. Can be reduced. In addition, since the resin is integrally molded, the overall rigidity can be increased and the required strength can be ensured while reducing the weight by the resin, and the sound absorption effect by the increase in rigidity can be enhanced.

  Furthermore, since the meter mounting surface 44a facing diagonally rear and the side mirror mounting surface 40a facing diagonally forward are connected by a substantially flat continuous wall 47, there is no recess behind the side mirror mounting surface 40a. As a result, the volume of the ram duct unit 34 is increased. As a result, the rigidity of the ram duct unit 34 is increased, and the meter unit 42 and the side mirror 38 are firmly supported. Further, since the reinforcing rib 53 is provided on the back surface of the bracket 44, the meter unit 42 and the side mirror 38 can be supported more firmly.

  Further, since the lamp support piece 46 for mounting the headlamp 20 and the hook 70 for fixing a harness (not shown) connected to the meter unit 42 are also integrally formed, the number of parts and the number of assembly steps can be further reduced. .

  Further, since the resonator chamber 48 for reducing the intake noise is integrally formed, the number of parts and assembly man-hours can be further reduced, and the space below the ram duct unit 34 can be effectively utilized to increase the volume of the resonator chamber 48. Can earn. Furthermore, by attaching the immobilizer amplifier 50 to the resonator chamber 48, the space below the ram duct unit 34 can be effectively utilized.

  As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, modifications, or deletions can be made without departing from the spirit of the present invention. Therefore, such a thing is also included in the scope of the present invention.

E Engine 1 Body frame 20 Head lamp 34 Ram duct unit 36 Ram duct 38 Side mirror 40 Stay 40a Side mirror mounting surface 42 Meter unit 44 Bracket 44a Meter mounting surface 46 Lamp support piece 48 Resonator chamber 53 Rib 70 Hook

Claims (7)

A ram duct unit attached to the front part of the body frame of a motorcycle,
A ram duct unit in which a ram duct that takes in intake air into an engine, a stay that supports a side mirror, and a bracket that supports a meter unit are integrally formed of resin. In Claim 1, the meter mounting surface of the bracket faces diagonally rear, the side mirror mounting surface of the stay is located on the side of the meter mounting surface and faces diagonally forward,
A ram duct unit connected by a substantially flat continuous surface from the meter mounting surface of the bracket to the back surface of the stay connected to the side mirror mounting surface of the stay.   The ram duct unit according to claim 2, wherein the meter mounting surface of the bracket has a fan shape in plan view.   4. The ram duct unit according to claim 1, wherein a reinforcing rib is provided on a back surface of the bracket.   The ram duct unit according to any one of claims 1 to 4, further comprising a lamp support portion to which a headlamp is attached.   The ram duct unit according to any one of claims 1 to 5, wherein a hook for fixing a harness connected to the meter is integrally formed.   The ram duct unit according to any one of claims 1 to 6, wherein a resonator chamber for further reducing intake noise is integrally formed.

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