JP4136466B2 - Electronic circuit unit mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure of an electronic control unit including a heating element such as a regulator rectifier and a power transistor, and more particularly to a mounting structure suitable for mounting the electronic control unit to a vehicle such as a two-wheeled vehicle.
[0002]
[Prior art]
FIG. 7 is a diagram showing a circuit configuration of a charging system including a regulator rectifier. An alternator 11 serving as an AC generator, and a regulated rectifier that rectifies and smoothes three-phase AC power output from the alternator 11. A (electronic circuit unit) 10 and a battery 13 charged with a direct current output from the regulator rectifier 10. The regulated rectifier 10 and the alternator 11 are connected by a coupler 12. The regulated rectifier 10 and the battery 13 are connected via a main fuse 14.
[0003]
Since the semiconductor switching elements such as the regulator rectifier and the power transistor are also heat generating elements, the electronic control unit including them has heat dissipation measures such as providing a large number of heat dissipating fins on the case surface in order to enhance the heat dissipation effect. It has been subjected. Also, in order to efficiently conduct heat to the attachment target side and cool itself, Japanese Patent Application Laid-Open No. 60-92179 discloses that the heating element is resin-molded and accommodated in the case, and the case is the attachment target. A technique for bringing a vehicle body component into surface contact is disclosed.
[0004]
[Problems to be solved by the invention]
In the technology in which the stay member is interposed between the electronic control unit and the attachment target, the heat dissipation capability depends on the surface area and shape of the stay member. Therefore, a plurality of types of stay members having different surface areas and shapes are prepared in advance, and the optimum stay member is selectively used according to the required heat dissipation capability. However, in order to form stay members having different surface areas and the like, it is necessary to prepare a mold for each stay member. Therefore, there is a technical problem that the manufacturing cost of the stay member increases.
[0005]
In order to enhance the heat dissipation effect, the surface area of the stay member must be increased. However, since the mounting space is limited in motorcycles, the mounting space for other parts may be sacrificed, or the body cover of the vehicle body It may be necessary to enlarge the size.
[0006]
The object of the present invention is to solve the above-mentioned problems of the prior art, and can respond to various demands regarding heat dissipation capability with an inexpensive configuration without securing a large number of types of stay members, and can secure an extra space. Another object of the present invention is to provide a compact electronic circuit unit mounting structure that does not require a large body cover.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that the following measures are taken in an electronic circuit unit mounting structure for mounting an electronic circuit unit incorporating a semiconductor switching element to a vehicle body frame of a vehicle. .
(1) The electronic circuit unit is attached to the vehicle body frame via a stay member integrally provided with a heat radiating member. According to such a feature, not only the heat dissipation of the electronic circuit unit can be controlled by the heat dissipation means of the stay member, but also the influence on the vehicle body frame can be minimized.
(2) The heat dissipating means is erected along the outer shape of the electronic circuit unit, and is attached to the vehicle body frame so as to be oriented in the vehicle width direction. According to such a feature, the heat dissipating means becomes compact and the influence on other members arranged around the electronic circuit unit can be reduced, and the traveling wind is effectively applied to the heat dissipating means. Can do.
(3) A plurality of stay members are stacked in the mounting direction to the vehicle body frame. According to such a feature, the heat dissipation capability can be adjusted by the number of stay members stacked.
(4) The electronic circuit unit and the stay member are in surface contact with each other. According to such a feature, the heat generated in the electronic circuit unit can be efficiently transmitted to the stay member.
(5) The electronic circuit unit includes an attaching means that penetrates the stay member, and each stay member has an elongated hole that penetrates the attaching means. According to such a feature, even when a plurality of stay members having the same shape are stacked, they can be easily fastened together.
(6) Each stay member is provided with an engaging means for positioning. According to such a feature, positioning when stacking the stay members can be easily performed without impairing the thermal conductivity between the stay members.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 6 is a transparent perspective view of a scooter type motorcycle employing the mounting structure of the present invention, and includes a low floor type step floor 17. Below the seat 18, an article storage unit (not shown) for storing a helmet and the like, a battery 13 disposed in the vicinity thereof, and a swing unit (not shown) pivotally supported by the vehicle body below the battery 13. Is placed. A belt-type continuously variable transmission (not shown) is attached to one side of the swing unit, and a muffler 19 is attached to the other side of the swing unit. The periphery of the article storage unit above the swing unit is covered with a rear body cover 51 which is a part of the vehicle body cover.
[0009]
In the present embodiment, inside the body cover 51, as shown in FIG. 8 , the regulator rectifier 10 as an electronic circuit unit is fixed to the bracket integral with the vehicle body frame 53 via the stay member 16, In the vicinity thereof, an engine ignition circuit and a fuel supply controller 52 are fixed.
[0010]
In the scooter type vehicle having such a configuration, since the vehicle body is covered with the body cover 51, the cooling effect by the traveling wind is reduced inside. Further, since the regulated rectifier 10 is attached to the space above the muffler 19, it is easily affected by the heat of the muffler. In addition, space is limited in the body cover, despite the requirement to secure a large article storage chamber and the need to avoid approach and interference with other parts. For this reason, high space efficiency is required for the mounting structure of an electronic circuit unit such as a regulator rectifier, and the configuration of the present invention is suitable for meeting such a requirement.
[0018]
FIG. 1 is a perspective view of a mounting structure according to an embodiment of the present invention. As shown in FIG. 2 , in this embodiment, stay members 4 having the same shape are combined to form a stay member pair 4/4. The stay member pairs 4/4 are stacked so as to be in surface contact with each other.
[0019]
Each stay member 4 includes a flat plate-like portion 41 and heat radiating fins 42 erected on one main surface side at the end of the plate-like portion 41. As shown in FIG. 2 , the stay member pair 4/4 is opposed to the pair of stay members 4 and 4 with their radiating fins 42 sandwiching both plate-like portions 41 and maintaining a predetermined gap d. It is arranged to be configured. Each stay member 4 includes a plurality of stay member pairs 4/4 having different gaps d on one main surface of the stay member pair 4/4 having a larger gap d and the other of the stay member pairs 4/4 having a smaller gap d. Are stacked such that the main surfaces of the two are in surface contact.
[0020]
According to such a configuration, a heat dissipation structure in which the heat dissipation effect is adjusted by changing the number of stacked stay members on which the heat dissipation fins are erected can be configured using stay members having the same shape. .
[0021]
As shown in FIG. 3 , the plate-like portion 41 of each stay member 4 is provided with a long hole 43 having a long diameter in the direction of the gap d, and the electronic circuit unit 10 is attached with the plurality of stay members 4 interposed therebetween. When fixing to the object, the fixing screw 11 is screwed into the screw hole of the attachment object through the long hole 43.
[0022]
Further, the plate-like portion 41 of each stay member 4 is arranged with two rows of projecting protrusions 44 and openings 45 protruding from the back surface along the counterattack direction of the stay member 4. When the pair of stay members 4 and 4 are separated from each other and stacked one above the other, as shown in FIG. 4 , the projecting protrusion 44 and the opening 45 are engaged with each other between the upper and lower stay members 4. Overlapping. This facilitates positioning of both.
[0023]
Incidentally, the thus formed projections 44 embossed in the bottom of the stay member 4, since the surface contact between the stay member 4 and the mounting surface becomes insufficient, as shown in FIG. 5, the embossed protrusions 44 Alternatively, a stay member 4a that does not form a groove may be prepared separately and used exclusively for the lower stage.
[0024]
In the above-described embodiment, the present invention has been described by taking the mounting structure of the vehicle regulator rectifier as an example. However, the present invention is similarly applied to the mounting structure of a heat generating electronic circuit unit other than the vehicle regulator rectifier. can do.
[0025]
【The invention's effect】
According to the present invention, the following effects are achieved.
(1) Since the electronic circuit unit is attached to the vehicle body frame via a stay member integrally provided with a heat radiating member, not only can the heat radiation of the electronic circuit unit be controlled by the heat radiating means of the stay member, but also the The impact can be minimized.
(2) The heat dissipating means is erected along the outer shape of the electronic circuit unit, and is attached to the vehicle body frame so as to be oriented in the vehicle width direction, so that the heat dissipating means is compact and arranged around the electronic circuit unit. Not only can the influence on other members be reduced, but also the traveling wind can be effectively applied to the heat dissipating means.
(3) Since a plurality of stay members are stacked in the mounting direction to the vehicle body frame, the heat dissipation capability can be adjusted by the number of stay members stacked.
(4) Since the electronic circuit unit and the stay member are in surface contact, the heat generated in the electronic circuit unit can be efficiently transmitted to the stay member.
(5) Since the electronic circuit unit is provided with attachment means that penetrate the stay member, and each stay member has a long hole that penetrates the attachment means, even when a plurality of stay members having the same shape are stacked. Can be fastened together.
(6) Since the engaging member for positioning is provided in each stay member, positioning when stacking the stay members can be easily performed without impairing the thermal conductivity between the stay members.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a mounting structure according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a stay member stacking method according to an embodiment of the present invention .
FIG. 3 is a plan view of a stay member constituting a heat radiating member.
FIG. 4 is a cross-sectional view of a stay member according to an embodiment of the present invention .
FIG. 5 is a cross-sectional view of a stay member in a modification of the embodiment of the present invention .
FIG. 6 is a transparent perspective view showing an arrangement example of a charging system in a motorcycle to which the present invention is applied.
FIG. 7 is a circuit configuration of a charging system including a conventional regulated rectifier.
FIG. 8 is a view showing a mounting structure that uses a stay member to increase heat dissipation efficiency.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 4 ... Stay member, 10 ... Electronic circuit unit (regulator rectifier), 11 ... Fixing screw, 41 ... Plate-shaped part, 42 ... Radiation fin, 43 ... Long diameter long hole, 44 ... Launching protrusion, 45 ... Opening

Claims (7)

An electronic circuit having a built-in semiconductor switching element and mounting an electronic circuit unit having a first radiating fin standing on a surface thereof to a vehicle body frame of a vehicle via a plate-like stay member integrally erected with a second radiating fin In the unit mounting structure,
The electronic circuit unit is in surface contact with the plate-like portion of the stay member;
The second radiating fin is erected along the outer shape of the electronic circuit unit in surface contact with the plate-like portion of the stay member and in a different direction from the first radiating fin,
The second radiating fin is configured discontinuously by arranging a pair of radiating fins with a predetermined gap,
The stay member includes two stay members having the same shape, each of which includes a planar plate-like portion and a second heat radiation fin erected on one main surface side at an end of the plate-like portion. The fins are arranged so as to sandwich both plate-like portions and face each other with a predetermined gap,
A plurality of the pair of stay members arranged opposite to each other are stacked while the gaps are different so that the plate-like portions overlap each other in surface contact and the second heat dissipating fins do not overlap. Electronic circuit unit mounting structure.   The electronic circuit unit mounting structure according to claim 1, wherein the plurality of stay members are stacked in the mounting direction to the vehicle body frame.   3. The electronic circuit unit according to claim 2, wherein the electronic circuit unit includes an attaching unit that penetrates the stay member, and each stay member has an elongated hole that penetrates the attaching unit. Mounting structure.   4. The electronic circuit unit mounting structure according to claim 3, wherein an engaging means for positioning is provided on each stay member. 2. The electronic device according to claim 1 , wherein the plate-like portions of the respective stay members are provided with elongated holes that are positioned so as to pass through the plate-like portions of all the stay members in a stacked state. Circuit unit mounting structure. The plate-like portion of each stay member is formed with a projecting projection that protrudes on the other main surface, and is associated with the projecting projection formed on the plate-like portion of the stay member stacked on one main surface side. The electronic circuit unit mounting structure according to claim 1 , wherein an opening is formed. The mounting structure for an electronic circuit unit according to claim 6 , wherein the projecting protrusion is not formed on a stay member arranged at a lowermost stage.

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