JP6954065B2 - Motorcycle rectifier mounting structure - Google Patents

Description

The present invention relates to a rectifier mounting structure for a motorcycle.

Conventionally, motorcycles are equipped with a rectifier that rectifies the AC output of a generator and a rectifier that has a voltage adjustment circuit that adjusts the generated voltage to a constant voltage. The challenge was to improve efficiency.

As a means for solving this problem, for example, a rectifier mounting structure in which rectifiers are erected on the left and right side frames of the rear frame of the vehicle body frame is known (see, for example, Patent Document 1 below).

JP-A-2015-214297

The above-mentioned conventional motorcycle rectifier mounting structure has been effective in solving the above-mentioned problems, but the development of further effective means has been desired.

The present invention has been made from such a viewpoint, and an object of the present invention is to provide a more effective means for improving the heat dissipation performance of the rectifier and improving the cooling efficiency.

In order to solve the above-mentioned problems, the rectifier mounting structure of the motorcycle according to the present invention is located in front of the center of rotation of the rear wheels of the motorcycle in a normal running state and at a position lower than the top of the rear wheels. The rectifier is arranged so that the heat radiation fins are exposed below the front part of the main rear fender provided above the wheel.

According to the present invention, it is possible to prevent clogging and fouling of the heat radiating fins and improve the heat radiating performance of the rectifier.

It is a left side view which shows the whole structure of the motorcycle which provided the rectifier mounting structure of the Example of this invention. It is a left side view which shows the rear part of the motorcycle which provided the rectifier mounting structure of the Example of this invention. It is a left side sectional view which shows the rectifier mounting structure of the Example of this invention. It is a plan sectional view which shows the rectifier mounting structure of the Example of this invention.

In the motorcycle rectifier mounting structure according to the embodiment of the present invention, the rectifier is arranged in front of the rotation center of the rear wheels of the motorcycle in the normal running state, and is located lower than the uppermost portion of the rear wheels. It is located in. A main rear fender is arranged above the rear wheels, and the rectifier is arranged so that the heat radiation fins are exposed below the front portion of the main rear fender.

As described above, according to the rectifier mounting structure of the motorcycle according to the embodiment of the present invention, muddy water or mud splashed up by the rear wheels is suppressed from adhering to the heat radiation fins of the rectifier, and the heat radiation fins It is possible to prevent clogging and stains. Therefore, the cooling performance of the heat radiation fins of the rectifier can be maintained high, and the cooling efficiency can be improved.

FIG. 1 is a left side view showing an overall configuration of a motorcycle having a rectifier mounting structure according to an embodiment of the present invention, and FIG. 2 is a left side showing a rear portion of a motorcycle having a rectifier mounting structure according to an embodiment of the present invention. FIG. 3 is a left sectional view showing a rectifier mounting structure according to an embodiment of the present invention, and FIG. 4 is a plan sectional view showing a rectifier mounting structure according to an embodiment of the present invention. When indicating the direction in the description of the embodiment of the present invention, the driver of the motorcycle is used as a reference, and the arrows at the lower right of each figure indicate the front, the rear, the upper, the lower, the left, and the right, respectively. It is indicated by F, B, U, D, L, and R.

(Overall configuration of motorcycle)
First, the overall configuration of the motorcycle 10 according to the embodiment of the present invention will be described with reference to FIG.

In the motorcycle 10, front wheels 11 and rear wheels 12 are arranged in front of and behind the vehicle, and an engine unit 14 suspended from a vehicle body frame 13 is provided between the front wheels 11 and the rear wheels 12. A fuel tank 15 is installed above the engine unit 14, and a seat 16 is provided adjacent to the rear of the fuel tank 15. A recess is formed in the lower portion of the fuel tank 15, and the air cleaner 17 is arranged in the recess. Further, an exhaust pipe 18 for exhausting exhaust gas after combustion is arranged in front of the engine unit 14, and a muffler 19 is attached to the downstream end side of the exhaust pipe 18.

A head pipe 20 is provided above the front end portion of the vehicle body frame 13. The head pipe 20 is provided with a front fork 22 rotatably to the left and right via a steering mechanism 21. A handlebar 23 is fixed to the upper end of the front fork 22. A front wheel 11 is rotatably supported at the lower end of the front fork 22, and a front fender 24 is provided so as to cover the upper portion of the front wheel 11. A radiator 25 is arranged behind the head pipe 20 and in front of the engine unit 14.

The vehicle body frame 13 includes a front frame 27 having a pair of left and right main frames 26 that are bifurcated from the head pipe 20 and extend rearward and downward, and a rear frame 28 that extends rearward and upward from the rear upper part of the front frame 27. And are provided. An engine unit 14 is suspended from the main frame 26, and a central body frame portion 29 is formed downward from the rear end portion of the main frame 26.

The rear frame 28 is provided with a pair of left and right seat rails 30 extending rearward and upward from the rear upper end portion of the main frame 26, and a seat rail pillar tube 31 extending rearward and upward from the middle of the rear end of the body frame portion 29. ing. The rear end portion of the seat rail 30 is joined to and integrated with the seat rail pillar tube 31, and the seat 16 is placed on the seat rail 30.

A pivot shaft 32 is erected at the lower center of a pair of left and right body frame portions 29 of the front frame 27, and a swing arm 33 is oscillatingly supported in the vertical direction around the pivot shaft 32. A rear wheel 12 is rotatably supported at the rear end of the swing arm 33 via a rear wheel axle 34, and the rear wheel 12 is cushionably supported by a rear cushion unit 35. As a result, when the motorcycle 10 is in the normal traveling state, the rear wheels 12 rotate around the rear wheel axle 34 as the center of rotation. Further, a footrest 37 is supported on the body frame portion 29 via a bracket 36.

The rear cushion unit 35 is arranged in the vertical direction at a substantially central portion in the left-right direction of the vehicle. The upper end of the rear cushion unit 35 is attached to the attachment portion (not shown) on the body frame portion 29 side of the front frame 27, and the lower end portion of the rear cushion unit 35 is one corner of the triangular link plate 38. It is pin-coupled to. One of the remaining corners of the link plate 38 is pin-coupled to the swing arm 33, and the other is pin-coupled to a mounting bracket (not shown) at the lower end of the body frame portion 29.

In FIG. 1, reference numeral 40 indicates an upper cowling that covers the upper front portion of the motorcycle 10, and reference numeral 41 indicates an under cowling that covers the lower front portion of the motorcycle 10. Parts covered by the cowlings 40 and 41. Is shown by a solid line, so each cowling 40, 41 itself is shown by a two-dot chain line.

In the motorcycle 10, the upper part of the rear wheel 12 is covered with the main rear fender 42. The main rear fender 42 is composed of a front rear fender 43 that covers an upper front portion of the rear wheel 12, and a rear rear fender 44 that covers an upper rear portion of the rear wheel 12 above the front rear fender 43. The lower surface of the main rear fender 42 is formed so as to tilt downward toward the front.

Below the front rear fender 43, an inner fender 45 that covers the upper front side of the rear wheel 12 is provided. A rear open space 46 that opens to the left and right in the vehicle width direction is formed between the front rear fender 43 and the inner fender 45, and when the motorcycle 10 is traveling, the traveling wind taken into the rear open space 46 is taken into the vehicle. It is designed to be distributed backwards. Further, a tail lamp 47 and a winker lamp 48 are attached to the rear end portion of the rear rear fender 44.

(Rectifier mounting structure)
Next, the rectifier mounting structure of the embodiment of the present invention will be described with reference to FIGS. 2 to 4.

As shown in FIG. 2, a rectifier 50 is attached below the front rear fender 43 of the main rear fender 42. The rectifier 50 is fixed between the left and right seat rail pillar tubes 31 by tightening means such as bolts and nuts, and is a vertical line passing through the rotation center (rear wheel axle 34) of the rear wheels 12 of the motorcycle 10 in a normal running state. It is arranged in front of (see the alternate long and short dash line a in FIG. 2) and lower than the horizontal line passing through the uppermost portion of the rear wheel 12 (see the alternate long and short dash line b in FIG. 2). Further, the rectifier 50 is arranged above the swing arm 33.

As is well shown in FIG. 3, a rear cushion unit 35 is arranged in front of the rectifier 50. Further, above the rectifier 50, an electrical component holder 52 to which a battery (not shown), a starter relay 51, etc. is attached is arranged, and the electrical component holder 52 is integrally formed with the front rear fender 43. There is.

The rectifier 50 includes a heat radiation fin 54 formed in the lower part of the main body 53 and an electric wire connecting portion 55 formed in the front part of the main body 53.

The heat radiating fins 54 are arranged so as to be exposed downward in the rear open space 46. The heat radiating fin 54 is formed in a comb-like shape in a side view, and intersects a line extending from the rear lower edge 54a of the heat radiating fin 54 in the tangential direction to the upper end of the rear wheel 12 (see the alternate long and short dash line c in FIG. 2). It is arranged so as to be oriented in the left-right direction. As a result, even if muddy water, mud, or the like scattered from the rear wheel 12 to the front in the tangential direction reaches the heat radiation fin 54, it is possible to prevent the heat radiation fin 54 from invading the inner part of the heat radiation fin 54. It is possible to prevent deterioration of cooling performance due to clogging.

As shown in FIGS. 3 and 4, a peripheral wall 56 is formed around the main body 53. A vertical wall 57 is formed downward on the peripheral wall 56 behind the main body 53, and an opening 58 through which the electric wire connecting portion 55 can pass is formed in front of the main body 53. The vertical wall 57 has a function of blocking muddy water, mud, etc. that scatter from the rear wheels 12 to the main rear fender 42, travel along the lower surface of the main rear fender 42, and flow forward, and drop them downward. As a result, it is possible to prevent the heat radiating fins 54 from being contaminated by muddy water or mud scattered from the rear wheels 12, and to prevent deterioration of the cooling performance of the heat radiating fins 54. In order to facilitate the circulation of running wind in the space around the heat radiating fins 54 when the motorcycle 10 is running, it is preferable that the lower end of the peripheral wall 56 is formed so as to be located above the heat radiating fins 54.

Further, as shown in FIG. 2, the inner fender 45 is a line connecting the rear lower edge 54a of the heat radiation fin 54 and the rotation center (rear wheel axle 34) of the rear wheel 12 (see the alternate long and short dash line d in FIG. 2). It is formed so as to extend backward. As a result, it is possible to prevent muddy water, mud, etc. scattered in the centrifugal direction of the rear wheels 12 from directly hitting the heat radiating fins 54 due to the centrifugal force generated by the rotation of the rear wheels 12, and the heat radiating fins 54 are soiled or clogged. It is possible to prevent deterioration of cooling performance.

Again, referring to FIGS. 3 and 4, a connection accommodating chamber 59 is attached in front of the peripheral wall 56. In the connection portion accommodating chamber 59, a left side wall 60 and a right side wall 61 are formed so as to cover the left side and the right side of the electric wire connection portion 55, respectively, and a bottom wall 62 is formed so as to cover the lower part of the electric wire connection portion 55. ing. The electric wire 63 connected to the electric wire connecting portion 55 via the coupler bends to the right in the connecting portion accommodating chamber 59, penetrates the right side wall 61, and is wired to the outside of the connecting portion accommodating chamber 59.

A front opening portion 64 and an upper opening portion 65 are formed in front of and above the connecting portion accommodating chamber 59, respectively, and a rear cushion unit 35 is arranged in front of the front opening portion 64. As is well shown in FIG. 4, the front end portion of the bottom wall 62 of the connection portion accommodating chamber 59 is curved in a concave shape toward the central portion so as to follow the shape of the rear cushion unit 35 in a plan view. It is formed. Further, as is well shown in FIG. 3, the bottom wall 62 is formed so as to be inclined downward toward the front, and rainwater or the like that has entered the connection portion accommodating chamber 59 naturally flows out from the front opening portion 64 to the outside. It is supposed to leak.

(Action and effect of this example)
According to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, the rectifier 50 is lower than the rear axle 34 of the motorcycle 10 in the normal traveling state and lower than the uppermost portion of the rear wheel 12. It is placed in position. In the normal running state of the motorcycle 10, muddy water, mud, etc. on the road surface adhere to the rear wheels 12 near the ground contact point located directly below the rear wheel axle 34, and the centrifugal force generated by the rotation of the rear wheels 12 causes the centrifugal direction. Alternatively, it scatters in the tangential direction of the rear wheel 12. The amount of mud and mud scattered from the rear wheels 12 is larger in the first half region closer to the start point during one rotation of the rear wheel 12 from the ground contact point, which is the start point, and decreases in the second half region away from the start point. do. That is, in the embodiment of the present invention, the position ahead of the rear wheel axle 34 on which the rectifier 50 is arranged and lower than the uppermost portion of the rear wheel 12 corresponds to the latter half region where the amount of scattered muddy water, mud, etc. is reduced. Therefore, the amount of muddy water and mud adhering to the heat radiating fins 54 of the rectifier 50 is extremely small, clogging and contamination of the heat radiating fins 54 can be prevented, and the cooling performance of the heat radiating fins 54 can be maintained high.

Further, since the rectifier 50 is arranged above the swing arm 33, the muddy water and mud wound up by the front wheels 11 are blocked by the swing arm 33 and do not fly to the rectifier 50.

Further, according to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, the inner fender 45 is a line d connecting the rear lower edge 54a of the heat radiation fin 54 and the rear wheel axle 34 (see FIG. 2). It is formed so as to extend further backward. As a result, it is possible to prevent muddy water, mud, etc. scattered from the front portion of the rear wheel 12 upward in the centrifugal direction due to the centrifugal force generated by the rotation of the rear wheel 12 from directly hitting the heat radiating fin 54. It is possible to prevent deterioration of cooling performance due to stains and clogging. Further, since it is not necessary to cover the rear part of the rear wheel 12 with the inner fender 45 in order to prevent muddy water or mud scattered from the rear wheel 12 from directly hitting the heat radiation fin 54, the inner fender 45 becomes larger and has an unspring mass. There is no problem that the tracking performance of the rear wheels 12 on the road surface is lowered due to the increase in the number of the wheels 12 and the traveling performance is adversely affected.

Further, according to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, the heat radiating fins 54 are arranged in a direction oriented in the left-right direction intersecting the scattering direction of muddy water or the like from the rear wheels 12. There is. As a result, even if muddy water or mud scattered from the rear wheels 12 reaches the heat radiating fins 54, it can be prevented from invading the inner part of the heat radiating fins 54, so that the cooling performance due to clogging of the heat radiating fins 54 can be improved. It is possible to prevent the decrease.

Further, since the heat radiation fins 54 of the rectifier 50 are exposed in the rear open space 46 between the front rear fender 43 and the inner fender 45, the rectifier 50, which is a heat generating electrical component, is directly exposed to the running wind. The heat radiating fins 54 can enhance the heat radiating performance and improve the cooling efficiency. Further, since the heat radiating fins 54 are arranged so as to be exposed downward in the rear open space 46, it is easy for the traveling wind to hit evenly when the motorcycle 10 is traveling, and the cooling performance can be improved, so that the rectifier 50 can be improved. The heat dissipation performance of the motorcycle can be kept good.

Further, according to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, a vertical wall 57 is formed downward on the lower surface of the main rear fender 42 behind the rectifier 50. As a result, the vertical wall 57 blocks the mud and mud that scatter from the rear wheel 12 to the rear part of the main rear fender 42 and flow down the lower surface of the main rear fender 42 and flow forward. It is possible to prevent the heat radiating fin 54 from being contaminated by scattered muddy water, mud, or the like, and to prevent deterioration of the cooling performance of the heat radiating fin 54.

Further, according to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, the connection portion accommodating chamber 59 is formed in front of the peripheral wall 56, and the electric wire connecting portion 55 is formed in the connection portion accommodating chamber 59. The left and right side walls 60 and 61 and the bottom wall 62 are formed so as to cover the left and right sides and the lower side of the wall, respectively. As a result, not only the scattering of muddy water and mud from the rear wheels 12 from a certain direction when the vehicle is running, but also the high-pressure washing water is sprayed from the left-right direction and the lower side when washing the vehicle. Even in such a case, the high-pressure washing water does not directly hit the electric wire connecting portion 55, and there is no possibility that the cleaning water infiltrates into the electric wire connecting portion 55.

Further, according to the rectifier mounting structure of the motorcycle 10 according to the embodiment of the present invention described above, the front opening portion 64 is formed in front of the connection portion accommodating chamber 59, and the rear cushion unit is in front of the front opening portion 64. The arrangement is such that it is covered with 35. Since the rear cushion unit 35 vibrates while the vehicle is running, when a front wall is provided in the connection portion accommodating chamber 59, a space for avoiding contact with the front wall due to the vibration of the rear cushion unit 35 is provided in the front wall. Further forward is required, and it becomes difficult to secure a sufficient volume of the connection portion accommodating chamber 59. However, by adopting the above arrangement, the front wall of the connection portion accommodating chamber 59 becomes unnecessary and the inside is not required. The space can be used widely. Furthermore, since the upper opening portion 65 is also formed above the connecting portion accommodating chamber 59, it is possible to easily and surely perform the connection work of the electric wire 63 in the electric wire connecting portion 55.

In the above embodiment, the rectifier 50 is fixed between the left and right seat rail pillar tubes 31 by tightening means such as bolts and nuts, but the center of rotation of the rear wheels 12 of the motorcycle 10 in the normal running state ( If the radiating fins 54 are mounted so as to be exposed in front of the rear wheel axle 34) and at a position lower than the uppermost portion of the rear wheels 12, the mounting location and mounting method of the rectifier 50 can be changed in various ways.

Further, in the above-described embodiment, the heat radiating fins 54 are arranged so as to be directed in the left-right direction intersecting the scattering direction of muddy water or the like from the rear wheels 12, but even if they are arranged so as to be directed in the front-rear direction. good. In this case, since the radiating fins 54 are arranged along the flow direction of the traveling wind, the traveling wind can smoothly circulate around the radiating fins 54, so that the radiating performance can be kept good.

Further, the present invention can be appropriately modified within the scope of claims and within a range not contrary to the gist or idea of the invention that can be read from the entire specification, and the rectifier mounting structure accompanied by such modification is also the present invention. Included in technical ideas.

10 Motorcycle 12 Rear wheel 34 Rear wheel axle (center of rotation)
35 Rear cushion unit 42 Main rear fender 45 Inner fender 50 Rectifier 54 Heat dissipation fin 55 Electric wire connection 57 Vertical wall 59 Connection accommodation room 60 Left side wall 61 Right side wall 62 Bottom wall 64 Front open part 65 Upper open part

Claims (3)

A lecti so that the heat radiation fins are exposed below the front part of the main rear fender provided above the rear wheels at a position in front of the center of rotation of the rear wheels of the motorcycle in the normal running state and lower than the uppermost part of the rear wheels. Fire is placed ,
An inner fender is provided below the front part of the main rear fender so as to cover the upper part of the front part of the rear wheel, and the inner fender is from a line connecting the lower rear edge of the heat radiation fin and the rotation center of the rear wheel. Also extends backwards
A rear open space that opens to the left and right in the vehicle width direction is formed between the main rear fender and the inner fender.
A vertical wall is formed downward on the lower surface of the main rear fender at least behind the rectifier, and the lower end of the vertical wall is formed so as to be located above the heat radiation fins. Motorcycle rectifier mounting structure. The rectifier mounting structure according to claim 1, wherein the heat radiating fins are arranged in a direction intersecting the direction in which muddy water is scattered from the rear wheels. A connection portion accommodating chamber for accommodating the electric wire connection portion formed in the front portion of the rectifier is provided, and the connection portion accommodating chamber has left and right side walls and a bottom wall so as to cover the left and right and the lower side of the electric wire connection portion. The rectifier mounting structure according to claim 1 or 2 , wherein an open portion is formed at the front and an upper portion, respectively, and a rear cushion unit is arranged in front of the front open portion.

Images