JP3532882B2 - Motorcycle front cowl - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cowling of a motorcycle having a radiator arranged in front of an engine, and relates to a front cowl such as an under cowl and an upper cowl. This makes it easy to assemble it to the vehicle body and improves the efficiency of guiding the air to the radiator. 2. Description of the Related Art In a motorcycle, for example, a radiator is disposed in front of an engine, and cooling is performed by dissipating heat to the outside through cooling water from the engine side to the radiator, and cooling the cooled cooling water. Cooling the engine by returning it to the engine side, covering both sides of the engine from the front side of the head pipe with a front cowl provided with a windshield, taking in the running wind from the running wind inlet on the front of this front cowl, and behind it The radiator cools the radiator. An example of such a prior art is described in Japanese Patent Application Laid-Open No. 60-67280. This conventional front cowl is assembled by combining an upper cowling, left and right side cowlings and a lower cowling. The radiator is widened in the vehicle width direction in order to improve the cooling efficiency, and the area of the radiator which is exposed to the traveling wind is increased. However, the radiator may be further provided with a fan in order to increase the cooling efficiency of the radiator. In placing the fan, care must be taken not to interfere with the engine and to prevent the traveling wind from hitting the engine. For this reason, for example, it is conceivable to use two fans and arrange them on both sides in the vehicle width direction so as to avoid interference with the engine and not to hinder the traveling wind from hitting the engine. In the case of, it also extends in the vehicle width direction, so that interference with the engine may not be avoided. Therefore, the radiator is arranged so as to be on the front side, and the front wheels are further arranged farther from the engine on the front side, so that the wheelbase becomes longer and larger. As for the motorcycle front cowl as described above, its configuration has been simplified,
It is required to reduce the number of parts to facilitate assembly, and to increase the efficiency of guiding air to the radiator. [0004] Accordingly, the present invention provides
A radiator is arranged on the front side of the engine, cooling is performed by dissipating heat to the outside through cooling water from the engine side to the radiator, and cooling the engine by returning the cooled cooling water to the engine side, A motorcycle front cowl that covers both sides of the engine from the front side of the head pipe with a front cowl provided with a windshield, takes in the running wind from the running wind inlet on the front of the front cowl, and guides it to the radiator behind it to cool the radiator. It is an object of the present invention to devise a structure for reducing the number of parts, facilitating assembling, and increasing the efficiency of guiding air to the radiator. Means taken to solve the above problem is to arrange a radiator in front of the engine, and to dissipate heat to the outside through cooling water from the engine side to the radiator. Cooling, returning the cooled cooling water to the engine side to cool the engine,
A motorcycle front cowl that covers both sides of the engine from the front side of the head pipe with a front cowl provided with a windshield, takes in the running wind from the running wind inlet on the front of the front cowl, and guides it to the radiator behind it to cool the radiator. Given the following, (a) to (d)
It is composed of (A) The front cowl that covers both sides of the engine from the front of the head pipe is an under cowl, an upper cowl,
(2) The under cowl has an integral wall on the front side thereof, and the left and right panels are integrally formed through the wall to form a U-shape. (C) a joining portion for joining a lower portion of the upper cowl is provided at an upper portion of the under cowl, and a joining portion with the under cowl is also provided at a lower portion of the upper cowl. The upper cowl has a front opening, and
Both sides of the parka cowl are formed to curve outwardly convexly
Cage (see FIG. 13), the left and right inner sides of the front opening and the
By screwing the inner panel to the mounting boss provided on the left and right inner facing the rear of the radiator side, the
Lower the inner panel between the left and right inner sides of the upper cowl and the radiator side from the upper end to the lower end of the radiator side.
(See FIGS. 3 and 12), and the lower end of the center cowl is engaged with the upper side of these inner panels. The upper cowl has outwardly projecting sides.
It is formed by curved in a front opening inside of the left and right upper cowl each of the inner panel of the front cowl, a radiator side of the rear Appaka
Between Ur subjected from the upper end to the lower end of the radiator side
As a result, the traveling wind introduced from the front opening is guided rearward by the inner panel, and the traveling wind is prevented from leaking to the outside from between the front opening and the radiator. Improve the efficiency of air flow for traveling wind. Further, when the upper cowl is formed integrally with the inner panel, a large panel is formed. Therefore, it is difficult to form the upper cowl. However, since the inner panel is formed separately, the forming is facilitated. Furthermore, since the inner panel is screwed to mounting bosses provided on the left and right inner sides of the front opening, and the lower ends of the center cowl are engaged on the upper side of the inner panel, these inner panels are left and right of the upper cowl and Connection and support to the upper center cowl is ensured. Furthermore, an integral wall is provided on the front side of the under cowl, the left and right panels are integrated with the wall, and the main cowling of the front cowl is combined with the under cowl integrating the left and right panels and the upper upper cowl. The front cowl is easily assembled to the vehicle body. A front fork 3 is provided on a head pipe 2 constituting a body frame 1 of a motorcycle. A front wheel 4 is supported at a lower portion of the front fork 3, and a handle 5 is mounted at an upper portion. ing. A pair of left and right main frames 6 extend rearward from the head tube 2, and a rear arm bracket 7 is connected to a rear end of the pair of main frames 6. A bracket 8 is provided behind each of the pair of left and right main frames 6, and a lower seat rail 9 and an upper seat rail 10 are connected to the bracket 8, and a rear seat rail 11 is provided at a rear portion of the lower seat rail 9. After being connected, the seat rail 11 is supported by an auxiliary rail 12 connected to the lower seat rail 9. As shown in FIGS. 7 and 8, a pivot shaft 13 is wound around the pair of right and left rear arm brackets 7 and fastened and fixed by nuts 14. The pivot shaft 13 is supported via an adjusting member 15. The adjusting member 15 is press-fitted into the rear arm bracket 7 from outside, and a collar 16 is press-fitted from inside the rear arm bracket 7. The bearing 1 is attached to the pivot shaft 13.
7, the front end 18a of the rear arm 18 is pivotally supported,
The rear arm 18 can swing up and down. The adjusting member 15 and the collar 16 are formed with support holes 15a and 16a, and the pivot shaft 13 is supported at a central position in the vertical direction in FIG. When the adjusting member 15 and the collar 16 are replaced with ones in which the support holes 15a, 16a are eccentric, and the position shown in FIG. 9 is reached, the taper 15b of the adjusting member 15 contacts the mounting hole 7a of the rear arm bracket 7, and the shaft of the adjusting member 15 is rotated. There is a gap between the surface 15c perpendicular to the direction and the collar 16, and the surface 15d, the parallel surface 15e, and the rear arm bracket 7
There is a gap between the mounting shaft 7a and the pivot shaft 13 and the pivot shaft 13 is supported at a lower position. By rotating the adjusting member 15 and the collar 16 further upside down, the pivot shaft 13 is located at the upper position, the position of the pivot shaft 13 can be easily changed, and adjustment of the rear wheel is easy. is there. At the lower part of the rear arm bracket 7, FIG.
As shown in the figure, a vehicle body side link 19 is rotatably connected to a support pin 20 as a fulcrum, and an arm side link 21 is rotatably connected to the vehicle body side link 19 about a support pin 22 as a fulcrum. Is the support pin 2 on the rear arm 18.
3 is rotatably connected to a fulcrum. A lower portion 24 a of a rear suspension 24 is pivotally supported by the vehicle body side link 19, and an upper portion 24 b is pivotally supported by a cross member 25 which is bridged over a rear portion of the main frame 6. A rear wheel 26 is provided at a rear end of the rear arm 18. The front of the left and right main frames 6 is
The mounting bracket 27 is provided as shown in FIG.
9, the cylinder 29 is fastened and fixed to the mounting bracket 27 by a fastening bolt 30. Main frame 6
A mounting stay 31 is provided on the rear side, and a support shaft 32 is bridged between the mounting stays 31, and the rear upper portion of the engine case 33 of the parallel multi-cylinder engine 28 is supported by the support shaft 32. . Furthermore, the rear arm bracket 7
A mounting stay 34 is also provided on the lower side, and a support shaft 35 is bridged between the mounting stays 34, and the lower rear portion of the engine case 33 is supported by the support shaft 35. The cylinder 29 of the parallel multi-cylinder engine 28 is tilted forward, and the cylinder 2
An exhaust pipe 36 extends rearward from the front of the engine 9 below the parallel multi-cylinder engine 28, and a muffler 37 connected to the exhaust pipe 36 is located on the right side of the rear wheel 26. As shown in FIGS. 10 and 11, an ignition coil 38 of an ignition device is mounted inside the vicinity of the head pipe of the main frame 6 on the left side when viewed from a plane. To mount the ignition coil 38, a mounting bracket 39 is welded to the inside of the main frame 6, and a mounting plate 40 is fastened and fixed to the mounting bracket 39 with a tightening bolt 41. The mounting plate 40 has a pair of support pieces 40.
a is formed on the supporting piece 40a.
8 are attached by inserting rubber caps 42 at both ends. The rubber cap 42 of the ignition coil 38 has a through hole 4
2a are formed, and the mounting plate 40 is
Can be easily attached by inserting the supporting piece 40a, and the inspection of the ignition coil 38 is easy. Moreover,
The rubber cap 42 prevents vibration from the vehicle body frame from being transmitted to the ignition coil 38. An intake pipe 43 is connected to the rear side of the cylinder 29 of the parallel multi-cylinder engine 28, and a carburetor 44 connected to the intake pipe 43 is located between the main frames 6. Vaporizer 4
The air cleaner 45 connected to the main frame 4 is disposed below the fuel tank 46.
Is placed on top. A tandem seat 47 is disposed at the rear of the fuel tank 46, and a lower rear portion of the tandem seat 47 is covered by a rear cowl 48 from both sides thereof. Protruding toward. A tail lamp 49 is provided behind the mudguard, and a flasher lamp 50 is provided on the left and right. Further, both sides of the parallel multi-cylinder engine 28 from the front side of the head pipe 2 are covered with a front cowl 51, and the front cowl 51 is further provided with a windshield 5.
2 are provided. The front cowl 51 includes an under cowl 53, an upper cowl 54, and a center cowl 56.
And an inner panel 55. The under cowl 53 has a wall 53w integrally on the front side thereof, and the left and right panels 53p are integrally formed through the wall 53w to form a U-shape. As shown in FIG. Is formed with a joining concave portion 53a,
b is formed, and a mounting portion 53c is formed on the upper front side so as to rise upward. A mounting hole 53d is formed in an upper portion of the under cowl 53, and vehicle body mounting holes 53e and 53f are formed in a central portion and a rear lower portion. A joint recess 54a is formed on both sides of a lower portion of the upper cowl 54, and a joint protrusion 54b is further formed. The lower cowl 54 is joined to the upper part of the under cowl 53 by joining the lower part thereof.
7 for fastening. A center cowl mounting hole 54c is formed in the upper part of the upper cowl 54, and the center cowl 56 is fastened and fixed by screws 58. On both rear sides of the upper cowl 54, a vehicle mounting hole 54d is provided.
A mounting hole 54e for a flasher lamp 59 is formed on both front sides, and an opening 54f through which air flows is formed in the center of the upper cowl 54. The upper part of the opening 54f is located relatively behind the upper part of the radiator 63, and has a large opening so that the wind blown from the fan 65 on the left side of the vehicle body can be smoothly discharged. Furthermore, on the front side of the upper cowl 54,
As shown in FIG. 12 and FIG.
5 is provided, and the lower end of the center cowl 56 is stretched over the upper side so as to connect the left and right inner panels 55. The left and right inner panels 55 are
Screws 60 are mounted from the panel mounting holes 54g formed in the upper cowl 54 at two places on the front side and two places on the upper side.
Attached to the inside. Left and right inner panels 55
18 and 19, a mounting boss 54h is provided inside the upper cowl 54, and the upper boss 54h is fixed to the mounting boss 54h from the inside with screws 60 from the inside. The lower ends of the center cowl 56 are attached to and cover the left and right inner panels 55. As described above, the under cowl 53, the upper cowl 54, the center cowl 56 and the inner panel 5
The front cowl 51 constituted by 5 is screwed into the vehicle body mounting holes 53e and 53f and the vehicle body mounting hole 54d, and is fastened and fixed to the bracket of the vehicle body frame 1. Further, the flasher lamp 59 is inserted through the mounting hole 54e.
Is attached to the bracket of the body frame 1. Providing the inner panel 55 on the front cowl 51 eliminates a gap between the front cowl 51 and the radiator 63 disposed behind the front opening (travel wind inlet) 62, and guides the travel wind to the radiator 63. , The efficiency of the traveling wind to the radiator is improved, and as a result,
The cooling efficiency of the radiator is improved. The radiator 63 is a parallel multi-cylinder engine 2
8, the upper part of the radiator 63 is attached to the main frame 6, and the lower part is the parallel multi-cylinder engine 2
8 attached. The radiator 63 has a curved shape bent toward the front side when viewed from a plane, and both sides 63a of the radiator 63 in the vehicle width direction are located on the front side. On the rear surface of the radiator 63, two fans 64, 65 are arranged on both sides 63a in the vehicle width direction. The upper end of the radiator 63 is disposed close to the head pipe 2 of the vehicle body frame 1 and is located at a position where the traveling wind is easy to hit. Also, two fans 6 on both sides 63a of the radiator 63 in the vehicle width direction.
4, 65 have the same rotation direction, and in this embodiment, they are counterclockwise as viewed from the rear in the traveling direction. On the basis of the direction in which the two fans 64 and 65 rotate to send out the air formed on the upper side, the fan 6 on the side that sends out the air
5 has a large diameter. The radiator 63 is of a cross flow type, in which cooling water flows from the right side to the left side of the vehicle body, and a cooling water inlet pipe 66 guided from the engine side is provided on one upper side of the radiator 63 on the outside in the vehicle width direction. An outlet pipe 68 of the cooling water sent to the engine side is connected to the other lower part, and the inlet pipe 66 and the outlet pipe 68 are located at positions avoiding the air sending sides of the fans 64 and 65, respectively, as shown in FIG. Has been placed. As described above, the central portion 63 of the radiator 63
b can be close to the parallel multi-cylinder engine 28,
Since the air can be pushed out by the fans 64 and 65 without obstruction toward the outside in the vehicle width direction, the cooling efficiency of the radiator 63 is improved. Further, the central portion 63b of the radiator 63 can be arranged close to the parallel multi-cylinder engine 28 so that the fans 64 and 65 can be arranged without interfering with the parallel multi-cylinder engine 28, so that the wheel base is shortened and the size of the vehicle is reduced. Is possible. In addition, the fans 64 and 65 have the radiator 6
Because both sides 63a of the same vehicle width 3 are located on the front side,
The traveling wind can be effectively applied to the parallel multi-cylinder engine 28 without disturbing the fans 64 and 65. When the vertical dimension of the radiator 63 is the length from the front side of the cylinder 29 to the front side of the exhaust pipe 36, the cylinder 29 is located on the back of the upper part of the radiator 63, and it is difficult for the traveling wind to escape. Therefore, the temperature of the cooling water in the radiator 63 becomes high. On the other hand, the exhaust pipe 36 is located at the back of the lower part of the radiator 63, and the traveling wind easily passes through the space between the exhaust pipes 36. Therefore, the temperature of the cooling water in the radiator 63 becomes low. As described above, in the radiator 63, the cooling water has a high temperature in the upper part and the cooling water has a low temperature in the lower part, so that the upper and lower positions of the fans 64 and 65 with respect to the radiator 63 are higher in cooling efficiency. . In particular, in the case of a forward leaning engine, the cylinder 29 portion is relatively close to the radiator 63, but at this time, the effect of shortening the wheel base becomes more remarkable. A cooling water inlet pipe 66 guided from the engine side is connected to one of the radiators 63 on the outer side in the vehicle width direction, and a cooling water outlet pipe 68 sent to the engine side is connected to the other. The outlet pipe 68 and the outlet pipe 68 are arranged at positions avoiding the side from which the air is sent out of the fan, and the cooling efficiency is improved by the fans 64 and 65 without the inlet pipe 66 and the outlet pipe 68 obstructing the suction of the air. be able to. Further, the rotation directions of the fans 64, 65 located on both sides of the radiator 63 in the vehicle width direction are made the same, and the air existing in the space formed between and above the pair of fans 64, 65 is removed. The fan 65 on the side from which air is sent out has a large diameter with reference to the sending out direction. As described above, since the diameter of the fan 65 on the side that sends out air is made large, the amount of air sent by the other fan 64 is
A large amount of air is sucked out by the fan 65 that sends out the air. Accordingly, the ambient temperature at the front side of the parallel multi-cylinder engine 28 is higher at the upper side than at the lower side, since the cooling air is difficult to escape due to the radiator 63 being close to the parallel multi-cylinder engine 28, and the upper part of the radiator 63 Heat is trapped behind, and the area on the rear surface above the radiator 63 where the ambient temperature is high can be made a negative pressure atmosphere, and the rise in the ambient temperature can be suppressed, so that the cooling efficiency of the radiator 63 is improved. An opening 54f of the front cowl 51
Are fans 64, 65 arranged on the rear surface of the radiator 63.
The opening 54f is large on the upper side and smaller on the lower side, so that the large-diameter fan 65 has a larger amount of air suction than the amount of air sent. ing. FIG. 21 is a schematic diagram showing another embodiment of a motorcycle cooling device. The radiator 63 is configured in the same manner as described above. The rotation directions of the left and right fans 100, 101 disposed on the rear surface of the radiator 63 are the same in the clockwise direction, and the diameter of the right fan 100 as viewed from the rear in the traveling direction is increased. , The left side has a small diameter. Thereby, the area above the rear surface of the radiator 63 can be made into a negative pressure atmosphere by the suction of the air by the right fan 100, the rise of the ambient temperature can be suppressed, and the cooling efficiency of the radiator 63 improves. FIG. 22 is a schematic diagram showing another embodiment of a motorcycle cooling device. The radiator 63 is configured in the same manner as described above, and the rotation direction of the left and right fans 200 and 201 disposed on the rear surface of the radiator 63 is
0, 201 are different from each other, and the rotation direction of the right fan 200 is clockwise and the rotation direction of the left fan 201 is counterclockwise when viewed from the rear side in the traveling direction of the vehicle body. , 201, the area above the rear surface of the radiator 63 can be made into a negative pressure atmosphere due to the suction of air, and the rise in ambient temperature can be suppressed.
The cooling efficiency of the radiator 63 is improved. As described above, the upper cowl has outer sides on both sides.
The inner panel of the front cowl is formed between the left and right sides inside the front side opening of the upper cowl and the radiator side part behind the inner panel from the upper end of the radiator side part. by attached by interposing toward the lower end, running wind introduced from the front opening is guided rearward by the inner panel, the traveling wind from between the front opening and the radiator does not leak to the outside. Therefore, the efficiency of guiding the traveling wind to the radiator can be improved. Further, when the upper cowl is formed integrally with the inner panel, a large panel is formed. Therefore, it is difficult to form the upper cowl. However, since the inner panel is formed separately, the forming is easy. Further, the inner panel is radiated to the left and right inner sides of the front opening and to the rear of the inner panel.
Screws are attached to mounting bosses provided on the left and right inner sides facing the side of the upper cowl, and the lower ends of the center cowl are engaged with the upper side of these inner panels. Is securely connected and supported. Furthermore, an integral wall is provided on the front side of the under cowl, the left and right panels are integrated with the wall, and the main cowling of the front cowl is combined with the under cowl integrating the left and right panels and the upper upper cowl. The front cowl is easily assembled to the vehicle body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle. FIG. 2 is a plan view of the motorcycle. FIG. 3 is a front view of the motorcycle. FIG. 4 is a side view showing an arrangement of a radiator of the motorcycle. FIG. 5 is a plan view showing an arrangement of a radiator of the motorcycle. FIG. 6 is a side view showing a state where an engine is mounted on a vehicle body frame. FIG. 7 is a side view showing a support mechanism of the rear arm. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a cross-sectional view showing a state where the position is adjusted by a rear arm support mechanism. FIG. 10 is a plan view showing an attached state of an ignition coil. FIG. 11 is an enlarged plan view showing an attached state of an ignition coil. FIG. 12 is a side view of the front cowl. FIG. 13 is a front view of the front cowl. FIG. 14 is a side view of the under cowl. FIG. 15 is a plan view of an under cowl. FIG. 16 is a front view of the under cowl. FIG. 17 is a side view of the upper cowl. FIG. 18 is a sectional view taken along the line XVIII-XVIII in FIG. 19 is a sectional view taken along the line XIX-XIX in FIG. FIG. 20 is a schematic view of a cooling device of a motorcycle. FIG. 21 is a schematic view showing another embodiment of the cooling device for a motorcycle. FIG. 22 is a schematic diagram showing another embodiment of a cooling device for a motorcycle. [Description of Signs] 28: Parallel multi-cylinder engine 51: Front cowl 52: Wind shield 53: Under cowl 53a: Joint convex portion 53b: Joint concave portion 53c: Mounting portion 53e, 53f: body mounting portion 53p: left and right panels 53w of the under cowl 53: front wall 54 of the under cowl: upper cowl 54c: center cowl mounting hole 54d: vehicle body mounting hole 54g Panel mounting hole 54h Mounting boss 55 Inner panel 62 Front opening 63 Radiators 64 and 65 Fan

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-105152 (JP, A) JP-A 63-64588 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62J 17/00 B62J 39/00

Claims (1)

(57) [Claims 1] A radiator is disposed on the front side of an engine, heat is radiated to the outside by passing cooling water from the engine side to the radiator, and the radiator is cooled. Cooling the engine by returning it to the engine side, covering both sides of the engine from the front of the head pipe with a front cowl provided with a windshield, taking in the running wind from the running wind inlet on the front of this front cowl, and behind it In a motorcycle front cowl that cools the radiator by guiding to the radiator, the front cowl includes an under cowl, an upper cowl, a center cowl, and an inner panel, and the under cowl has an integral wall on a front side thereof, The left and right panels are integrated through the wall to form a U-shape. Provided with a joint portion for joining the lower portion of Ppakauru, in the lower portion of the upper cowl provided junction between the under cowl, the upper cowl has an front opening of the upper cowl
Both sides are formed to be curved outwardly convexly , facing the left and right inner sides of the front opening and the radiator side behind it.
To by screwing the inner panel to the mounting boss provided on the right and left inside the inner panel, between the left and right inner and the radiator side of the upper cowl, the Raj
A front cowl of a motorcycle in which the center cowl is engaged above the inner panel with the lower end interposed from the upper end to the lower end of the eta side .