JP5218123B2 - Radiator shroud structure of motorcycle - Google Patents

Description

  The present invention relates to a radiator shroud structure in a motorcycle.

Conventionally, for example, in a motorcycle described in Patent Document 1, a cowling is fastened with a screw using a side portion of a radiator.
Alternatively, in the radiator cover mounting structure described in Patent Document 2, after the cushion is mounted on the stay attached to the radiator, the stay is inserted into the U-shaped insertion hole provided on the back side of the radiator shroud. Are known.

JP 2003-212175 A Utility Model Registration No. 2505712

When an insertion hole is provided on the back side of a product as described in Patent Document 2, sink marks may occur on the product design surface corresponding to a rib or boss portion for forming the insertion hole. On the other hand, if the rib or boss is thinned as a measure for preventing the occurrence of sink marks on the design surface, it may be difficult to ensure sufficient strength as it is.
Furthermore, when forming insertion holes, such as a U shape, in the structure of a shaping die, a slide type or a slide mechanism is required. As a result, there is a problem that not only the mold structure is complicated, but also the mold cost is inevitably high.

  In view of such circumstances, an object of the present invention is to provide a radiator shroud structure for a motorcycle that is excellent in strength, rigidity, design, and the like and extremely advantageous in terms of cost and the like.

  A radiator shroud structure for a motorcycle according to the present invention includes a water-cooled engine supported by a vehicle body frame, a radiator disposed in front of the engine, and a radiator shroud that covers the radiator from the left and right sides of the vehicle body. In the motorcycle, the radiator shroud is substantially the same as the outer edge of the radiator core and the rear half that covers the radiator and the vicinity of the rear thereof from both the left and right sides, the inner side in the vehicle width direction of the rear half and the radiator core. A wind guide plate portion extending forward from the front side of the radiator in the vehicle width direction and a connecting wall portion bent in the vehicle width direction to connect the wind guide plate portion and the latter half portion. A shroud body formed integrally with the front half, and a separate body that is formed flush with the outer surface of the rear half and covers the front half from the outside Wherein the bar portion, in that it is configured.

  Further, in the radiator shroud structure for a motorcycle according to the present invention, the radiator is provided with an engaging protrusion from the left and right sides toward the front, while the radiator shroud has the shroud body corresponding to the engaging protrusion. An engagement hole that opens in the traveling direction of the vehicle is provided in the connection wall portion of the vehicle, and the radiator shroud is fixed by engaging the engagement protrusion with the engagement hole. And

  Further, in the radiator shroud structure for a motorcycle according to the present invention, the cover portion of the radiator shroud is provided with a second engagement projecting piece from the rear end edge connected to the shroud body toward the rear of the vehicle. The shroud body is provided with a second engagement hole opening in the connecting wall portion in the vehicle traveling direction, and the rear end edge of the cover portion is connected to the second engagement protrusion. The second engaging hole provided in the connecting wall portion is engaged and connected.

  In the radiator shroud structure for a motorcycle of the present invention, a screw or a screw is screwed from the wind guide plate portion to a boss portion provided on the cover portion, and the wind guide plate portion and the cover portion are fastened. And

  According to the present invention, it is possible to obtain a high coupling strength of the shroud body by engaging the engagement protrusion on the radiator side with the engagement hole of the shroud body in the connecting wall portion on the shroud body side. Further, the shroud main body and the cover portion can be engaged with the second engagement protrusion and the second engagement hole, so that a high coupling strength can be obtained for these, and the rigidity strength of the shroud as a whole is effective. Can be increased.

In this case, the engagement hole with which the engagement protrusion engages with the connecting wall portion is formed so as to open toward the traveling direction of the vehicle. It is not necessary to use. As a result, the mold structure can be simplified, and the mold cost and manufacturing cost can be effectively reduced.
In addition, in the appearance of the shroud, the shroud main body and the cover part are integrally coupled to obtain an external appearance form with a sense of unity. Realize excellent design as a product.

1 is a side view showing an example of the overall configuration of a motorcycle according to an embodiment of the present invention. 1 is a plan view showing an example of the overall configuration of a motorcycle according to an embodiment of the present invention. 1 is a front view and a rear view of a motorcycle according to an embodiment of the present invention. It is a perspective view of a radiator concerning an embodiment of the present invention. It is a side view of the radiator shroud which concerns on embodiment of this invention. It is a disassembled side view of the radiator shroud which concerns on embodiment of this invention. It is a front view of the radiator unit to which the radiator shroud in the embodiment of the present invention is attached. It is a top view of the radiator unit to which the radiator shroud was attached in the embodiment of the present invention. It is the side view which looked at the other radiator shroud from the inside of one radiator shroud in the embodiment of the present invention. It is sectional drawing which follows the AA line of FIG. (A) is an expansion perspective view which shows the circumference of an engagement hole, (b) is sectional drawing which follows the BB line of (a). It is sectional drawing which shows the example of the coupling | bonding structure of the shroud main body and cover part in embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a radiator shroud structure for a motorcycle according to the present invention will be described with reference to the drawings.
The radiator shroud according to the present invention can be effectively applied to various types of motorcycles. In this embodiment, for example, a motorcycle as shown in FIG. 1 is used. Note that, in the main points of the drawings referred to below, the front is indicated by an arrow Fr and the rear is indicated by an arrow Rr.

  First, an overall configuration of the motorcycle 100 according to the present embodiment will be schematically described. In FIG. 1 to FIG. 4, two left and right front forks 103 supported by a steering head pipe 102 so as to be pivotable to the left and right are provided at a front portion of a body frame 101 made of steel or an aluminum alloy material. A handle bar 104 is fixed to the upper end of the front fork 103, and grips 105 are provided at both ends of the handle bar 104. A front wheel 106 is rotatably supported at the lower portion of the front fork 103, and a front fender 107 is fixed so as to cover the upper portion of the front wheel 106. The front wheel 106 has a brake disc 108 that rotates integrally with the front wheel 106.

  The body frame 101 has a main frame portion bifurcated from the steering head pipe 102 in the left-right bifurcated shape, and the left and right are inclined downward and extend rearward. A swing arm 109 is swingably coupled to the rear portion of the vehicle body frame 101, and a rear shock absorber 110 is mounted between the swing arm 109 and the swing arm 109. A rear wheel 111 is rotatably supported at the rear end of the swing arm 109. The rear wheel 111 is rotationally driven through a driven sprocket 113 around which a chain 112 for transmitting engine power is wound. A chain cover 114 is mounted on the upper side of the chain 112, and a rear fender 115 is disposed above the rear wheel 111.

  The engine unit 116 is mounted between the front wheel 106 and the rear wheel 111 via the vehicle body frame 101 at a substantially central portion of the vehicle body, and an air-fuel mixture is supplied from a fuel injection device (not shown) and The exhaust gas after combustion is exhausted through the exhaust pipe 117. In the present embodiment, the engine may be, for example, a 4-cycle V-type 2-cylinder engine. The exhaust pipe 117 of each cylinder is coupled below the engine unit 116 and then exhausted from the muffler 119 through the exhaust chamber 118 near the rear end of the vehicle. In addition, an engine cooling radiator unit 120 (see FIG. 3A) is mounted obliquely in front of the engine unit 116.

  A fuel tank 121 is mounted above the engine unit 116, and a seat 122 (rider seat 122 </ b> A and tandem seat 122 </ b> B) is continuously provided behind the fuel tank 121. Footrests 123A and 123B are disposed corresponding to the rider seat 122A and the tandem seat 122B. Here, from the rear part of the vehicle body frame 101, the seat rail (not shown) and the seat pillar 124 extend in an integrated manner so as to incline rearward, and the seat 122 is supported by these. Further, a tandem handle 125 is mounted so as to project to the left and right sides of the tandem seat 122B. In this example, on the left side of the vehicle, a prop stand 126 is provided at a substantially central lower portion in the front-rear direction.

  Further, in the drawing, a headlamp unit 127 is disposed at the front of the vehicle, that is, the front side of the front fork 103. A meter unit 128 including a speedometer, a tachometer, various indicator lamps, and the like is attached above the head lamp unit 127, and a rearview mirror 130 is supported on the handle bar 104 via a stay 129.

  In the vehicle exterior, side covers 131 are attached to the left and right sides of the vehicle body, and so-called full cowlings that cover the front half of the vehicle body are not used. That is, in this embodiment, a shroud or cover is provided for each vehicle component or part. Use members. That is, for example, the cover 132 is attached to the outer periphery of the headlamp unit 127, and the radiator shroud 10 is attached to the left and right sides of the radiator unit 120. By covering the main part of the vehicle body with these covers or shrouds, an external appearance form with a sense of unity is formed as a whole vehicle body.

  Next, the radiator shroud 10 according to the present invention will be further described. As described above, the radiator unit 120 is disposed in front of the engine, and the radiator shroud 10 covers the radiator from the left and right sides of the vehicle. First, the radiator unit 120 will be described. FIG. 4 is a perspective view of the radiator unit 120 alone. In the figure, a core portion 133 of a substantially thin box type radiator is arranged in the vertical direction and facing the front side on the front side of the cylinder head of the engine. A tank 134 is attached to both the left and right sides of the core part 133. At the upper edge of the core part 133, stays 135 project upward at the right part and the left part, respectively, and the pair of stays 135 are coupled to the vehicle body frame 101. A stay 136 projects downward from the lower edge of the core 133, and the stay 136 is coupled to the engine (cylinder head cover). The radiator is mounted and supported on the vehicle body via these stays 135 and 136.

  Further, as shown in FIG. 8 or FIG. 9 or the like, a cooling fan 137 that is rotationally driven by a motor is attached to the back side (rear side of the vehicle) of the core portion 133 via a bracket 138. A radiator hose 139 is connected to the tank 134 (right side of the vehicle) (see FIG. 8 and the like).

  Further, shroud mounting stays (mounting stays) 140 that are arranged in a total of four locations, each in two upper and lower stages, extend forward from the left and right sides of the radiator (specifically, the left and right side surfaces of the left and right tanks 134). The upper stay 140 of the upper and lower sides is long, that is, protrudes forward from the lower stay. Note that these stays 140 function as engaging protrusions according to the present invention. The tip of each stay 140 has a shape such as an R shape or an arc shape, and a rubber or plastic cushion 141 is attached thereto.

  Each of the pair of radiator shrouds 10 disposed on the left and right sides of the radiator unit 120 is formed such that the appearance (design surface) as a whole protrudes to the left side or the right side of the vehicle appropriately curved. As shown in FIG. 5, the radiator shroud includes a shroud main body 11 and a cover portion 12 coupled to the front side thereof. The shroud main body 11 and the cover portion 12 are formed of synthetic resin, and both are combined and integrated as shown in FIG.

FIG. 6 shows a state where the shroud body 11 and the cover portion 12 are separated from each other. First, as shown in FIG. 6, the shroud main body 11 is formed by integrally forming a rear half 13 and a front half 14. Of these, the rear half 13 covers the radiator unit 120 and the vicinity of the rear thereof, that is, around the engine, particularly the cylinder head cover, or the cooling fan 137 from the left and right sides in a plan view of the vehicle (see FIG. 8).
The front half portion 14 is recessed inward in the vehicle width direction with respect to the rear half portion 13 and extends forward along the vehicle traveling direction from the front side of the radiator with a vehicle width direction length substantially the same as the outer edge of the core portion 133 of the radiator. And a connecting wall portion 16 that is bent in the vehicle width direction and connects the air guide plate portion 15 and the rear half portion 13.

  The cover portion 12 is formed so as to be smoothly flush with the outer side surface (design surface) of the rear half portion 13 of the shroud main body 11 when coupled to the shroud main body 11 and covers the front half portion 14 from the outside. It has become.

  7 and 8 are respectively a front view and a plan view of the radiator unit 120 to which the radiator shroud 10 is attached. FIG. 9 is a side view of the radiator shroud 10 from one side (left side) to the other side (right side). It is the side view which looked at. 7 and 8 show a state in which the cover 12 is removed from the shroud body 11 on the left side of the vehicle.

  The radiator shroud 10 attached so as to cover the radiator unit 120 as shown in FIGS. 7 to 8 is coupled and supported to the vehicle and the radiator unit 120 on the shroud body 11 side. In the support structure of the shroud body 11, as shown in FIG. 5 and the like, insertion holes 17 and 18 for passing screws or screws are formed in the upper end portion of the shroud body 11 and the stay portion 11a extending rearward, respectively. Yes. Then, the screws or screws 19 and 20 inserted through the insertion holes 17 and 18 are fastened and fixed at appropriate positions on the vehicle body frame 101 side as shown in FIG.

  Further, in the support structure of the shroud body 11, the connecting wall portion 16 is provided with two upper and lower engaging holes 21 and 21 as shown in FIG. 6 corresponding to the stay 140 protruding forward from the radiator unit 120. It is done. These engagement holes 21 are opened toward the traveling direction of the vehicle. Then, the shroud main body 11 is supported and fixed by engaging the stay 140 of the radiator unit 120 with the corresponding engagement hole 21.

  10 and 11 show details of the engagement structure of the stay 140 and the engagement hole 21. FIG. 10 is a cross-sectional view taken along the line AA in FIG. 9, FIG. 11A is an enlarged perspective view showing the periphery of the engagement hole 21 (FIG. 6), and FIG. 11B is a cross-sectional view along B- in FIG. It is sectional drawing which follows a B line. The stay 140 with the cushion 141 attached to its tip is inserted into the engagement hole 21 from the rear to the front. The stay 140 itself has a predetermined rigidity and strength, and the cushion 141 has appropriate elasticity. By engaging the stay 140 and the engagement hole 21 via the cushion 141, high support rigidity with respect to the shroud main body 11. Can be secured.

  In the above case, the engagement hole 21 has a hole wall 21a along the vehicle longitudinal direction, as shown in FIG. The hole wall 21a has a certain length in the front-rear direction, and the stay 140 and the cushion 141 inserted into the engagement hole 21 are in surface contact or contact with each other on both the left and right sides. Thus, by having sufficient engagement or fitting length between the stay 140 and the engagement hole 21, the coupling strength between the two can be effectively increased.

  Next, the coupling structure of the shroud main body 11 and the cover part 12 will be described. First, as shown in FIG. 6, the cover portion 12 is provided with a second engagement protrusion 22 from the rear end edge portion 12 a connected to the shroud body 11 toward the rear of the vehicle. On the other hand, the shroud main body 11 is provided with a second engagement hole 23 opened in the connecting wall portion 16 in the vehicle traveling direction. The rear end edge 12 a of the cover portion 12 engages and connects the second engagement protrusion 22 to the second engagement hole 23 provided in the connection wall portion 16.

  In this embodiment, the cover portion 12 has three second engaging pieces 22 in the upper, middle, and lower stages with a predetermined interval in the vertical direction. Correspondingly, the upper, middle and lower three second engagement holes 23 are also formed on the shroud body 11 side.

  Further, in the coupling structure of the shroud main body 11 and the cover portion 12, as shown in FIG. 6, the wind guide plate portion 15 has a screw seat portion 24 that protrudes outward from the vehicle (the front side in FIG. 6). Is provided. In this embodiment, there are three screw seats 24 at the upper, middle, and lower stages with a predetermined interval in the substantially vertical direction. Each screw seat 24 is provided with an insertion hole 25 for inserting a screw or a screw. On the other hand, on the cover portion 12 side, three boss portions 26 are provided corresponding to the screw seat portion 24 as shown in FIG. Each boss portion 26 is formed with a screw hole 28 into which a screw or screw 27 is screwed.

  The shroud main body 11 and the cover portion 12 have high coupling strength due to the engagement of the second engagement protrusion 22 and the second engagement hole 23 described above and the fastening of the boss portion 26 with screws or screws 27. Combined. The shroud main body 11 and the cover portion 12 are integrally coupled through these coupling structures, and an external appearance form having a sense of unity is obtained in the appearance of the radiator shroud 10 as a whole. Thereby, the outstanding design property as a product is realizable.

  As described above, the stay 140 of the radiator unit 120 is engaged with the engagement hole 21 provided in the connecting wall portion 16 of the shroud body 11, thereby supporting and fixing the shroud body 11 with high support rigidity. The connecting wall portion 16 forms a step structure with the air guide plate portion 15, and the engagement hole 21 is formed at the step portion, thereby ensuring the rigidity of the engagement hole 21 itself and the engagement hole 21. Since the hole wall 21a can be provided, a long engagement or fitting length is ensured. In that case, it is promoted by interposing the cushion 141 between the stay 140 and the engagement hole 21, and the shroud body 11 can be supported with extremely high bonding strength without rattling.

  Further, since the engagement hole 21 is formed so as to open toward the traveling direction of the vehicle, it is not particularly necessary to use a slide mold or the like in the mold for shroud molding. As a result, the mold structure can be simplified, and the mold cost and manufacturing cost can be effectively reduced.

  Further, the air guide plate portion 15 provided in the shroud main body 11 extends forward along the vehicle traveling direction from the front side of the radiator with substantially the same length in the vehicle width direction as the outer edge of the core portion 133 of the radiator. As is clear from FIG. 8 or FIG. 10 and the like, the wind guide plate 15 particularly directs the traveling wind received by the wind guide plate 15 into the core 133 of the radiator, that is, exhibits a high wind guide action on the core 133. . Thereby, the high cooling action of the radiator unit 120 can be realized and guaranteed.

  Moreover, in the external appearance of the radiator shroud 10, the shroud main body 11 and the cover portion are integrally coupled to obtain an external appearance form having a sense of unity as a whole. Realize excellent design as a product. In addition, there is no fear of sink marks or the like during molding, and the design surface of the molded product itself can ensure high quality.

As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention.
For example, the radiator shroud of the present invention can be effectively applied to a vehicle having a so-called full cowling that covers the entire vehicle body.
Further, the number of the second engagement protrusions 22 and the second engagement holes 23 described in the above embodiment, for example, can be increased or decreased as necessary in addition to the case of the above embodiment. .

DESCRIPTION OF SYMBOLS 10 Radiator shroud 11 Shroud main body 12 Cover part 13 Late part 14 Front half part 15 Air guide plate part 16 Connection wall part 21 Engagement hole 22 Second engagement protrusion 23 Second engagement hole 100 Motorcycle 101 Body frame 102 Steering head pipe 103 Front fork 106 Front wheel 107 Front fender 111 Rear wheel 116 Engine unit 117 Exhaust pipe 120 Radiator unit 121 Fuel tank

Claims (4)

In a motorcycle including a water-cooled engine supported by a vehicle body frame, a radiator disposed in front of the engine, and a radiator shroud that covers the radiator from the left and right sides of the vehicle body,
The radiator shroud is a rear half that covers the radiator and the vicinity of the rear thereof from the left and right sides in a plan view of the vehicle, and is recessed inward in the vehicle width direction from the rear half and substantially the same as the outer edge of the core of the radiator. A front half portion having a long air guide plate portion that extends forward from the front side of the radiator along the vehicle traveling direction and a connecting wall portion that is bent in the vehicle width direction and connects the air guide plate portion and the rear half portion; A shroud body integrally formed with,
A radiator shroud structure for a motorcycle, comprising: a separate cover portion that is formed flush with an outer surface of the rear half portion and covers the front half portion from the outside. The radiator is provided with engaging protrusions from the left and right sides toward the front, while the radiator shroud is open to the connecting wall portion of the shroud body in the vehicle traveling direction corresponding to the engaging protrusion. An engagement hole is provided,
The radiator shroud structure for a motorcycle according to claim 1, wherein the radiator shroud is fixed by engaging the engagement protrusion with the engagement hole. A cover portion of the radiator shroud is provided with a second engagement projecting piece from a rear end edge connected to the shroud main body toward the rear of the vehicle, while the shroud main body is connected to a connecting wall portion of the radiator shroud. Providing a second engagement hole that opens in the direction of travel;
3. The rear end edge portion of the cover portion is configured to engage and connect the second engagement protrusion piece to the second engagement hole provided in the connection wall portion. Radiator shroud structure for motorcycles.   The screw or screw is screwed onto the boss portion provided on the cover portion from the wind guide plate portion, and the wind guide plate portion and the cover portion are fastened. The described radiator shroud structure of the motorcycle.

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