JPS6333701Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a speed indicator light mounted on a large vehicle such as a truck.

For safety reasons, large trucks are equipped with multiple speed indicator lights that display the vehicle speed in stages on the roof panel. However, when a speed indicator light is provided on the roof panel, air flowing along the top surface of the roof panel when the vehicle is running is separated behind the indicator light, increasing the air resistance of the vehicle. This has been a cause of an increase in vehicle fuel consumption.

Therefore, a mounting structure for a speed indicator light as shown in FIGS. 1 and 2, for example, was devised. To explain this, three speed indicator lights 5 are attached to support legs 3 erected on a roof panel 2 near the upper edge of a windshield 1 via plate-shaped wings 4.
The airflow flowing along the upper surface of the roof panel 2 is rectified by the blades 4 to prevent separation thereof.

In addition, as shown in FIG. 3, three speed indicator lights 5 are each directly fixed on the top surface of the roof panel 2, and a rectifying duct 6 that opens in the longitudinal direction of the vehicle is provided to cover the upper part of the lights. There is also one in which the air flowing along the top surface of the roof panel 2 is rectified using the rectifying duct 6.

However, in such a conventional speed indicator light mounting structure, even if the blades 4 or the rectifying duct 6 are provided,
The rectification effect was extremely small. For example, as shown in Fig. 1, the wing 4 provided with wings 4 has a rectifying effect in the area where the indicator light 5 and support leg 3 are not present, but in the area where they are arranged, the air flow direction is affected. Due to the large change in shape, the rectification effect was small.

Furthermore, in the case where a rectifying duct 6 is provided surrounding the speed indicator light 5 as shown in FIG. Since the airflow separates, the rectification effect is poor and air resistance increases.

In view of these circumstances, the present invention provides a rectifying duct that opens in the front-rear direction of the vehicle on the top surface of the roof panel to rectify the air flowing near the top surface of the roof panel. A plurality of speed indicator lights are provided, the length of which is set shorter in the longitudinal direction of the vehicle than the longitudinal direction of the duct, and the rear end of the duct is located further forward of the vehicle than the rear end of the duct, thereby preventing the occurrence of turbulence due to the speed indicator lights. This prevents it from reaching the air flowing along the top surface of the roof panel.

Hereinafter, the present invention will be explained based on illustrated embodiments.

4 and 5 show an embodiment of the present invention.

To explain the structure, a rectifying duct 13 is provided on the roof panel 12 near the upper edge of the windshield 11, with the roof panel 12 serving as a bottom wall and opening in the longitudinal direction of the vehicle. Note that the passage area of the rectifying duct 13 gradually decreases toward the rear of the vehicle. Three speed indicator lights 15 are attached to the upper surface of the vehicle via support legs 14, with their display surfaces facing toward the front of the vehicle. Also,
As is clear from FIG. 5, the length of each speed indicator light 15 in the vehicle longitudinal direction is set shorter than the length of the rectifying duct 13 in the vehicle longitudinal direction, and each speed indicator light 15
The rear end of the rectifier duct 13 is located further forward of the vehicle than the rear end of the rectifier duct 13. Of course, these speed indicator lights 15 turn on in stages according to the vehicle speed when the vehicle is running.

In the mounting structure of the speed indicator lamp having such a configuration, when the vehicle is running, as shown in FIG.
This rectifies the air near the top surface of the roof panel 12 and causes it to flow toward the rear of the vehicle. Therefore, although turbulent flow occurs at the rear of the speed indicator light 15, this turbulent flow does not flow to the top surface of the roof panel 12, so no peeling occurs on the top surface of the roof panel, and the influence on the air resistance of the vehicle can be minimized. . In addition, the length of the speed indicator light 15 in the vehicle longitudinal direction is set shorter than the length of the rectifying duct 13 in the vehicle longitudinal direction, and the vehicle rear end of the speed indicator light 13 is positioned further forward of the vehicle than the vehicle rear end of the rectifying duct 13. Since the turbulent flow generated at the rear of the speed indicator lamp 15 is blocked by the rectifying duct 13 and does not flow to the upper surface of the roof panel 12, the rectifying effect of the rectifying duct 13 can be increased.

Note that if the inner wall of the rectifying duct 13 is made smooth, the effect of rectifying the air flowing therein can be further increased.

FIG. 6 shows another embodiment.

This embodiment is similar to the previous embodiment in that a rectifying duct 13 is provided on the top surface of the roof panel 12, but
The main body of the speed indicator light 16 is formed into a semi-cylindrical shape and is directly fixed to the rectifying duct 13 without providing support legs. Also, in this embodiment, the length of each speed indicator light 16 in the vehicle longitudinal direction is
As is clear from FIG. 6, the length of the rectifying duct 13 in the longitudinal direction of the vehicle is set to be shorter than that of the rectifying duct 13, and the rear end of each speed indicator lamp 16 is positioned further forward of the vehicle than the rear end of the rectifying duct 13. has been done.

In the mounting structure of this embodiment, the main body of the speed indicator light 16 is shaped like a semi-cylindrical fish cake, and the supporting legs are eliminated, so that the turbulence generated behind the indicator light 16 can be reduced compared to the previous embodiment. Therefore, the influence of turbulence on vehicle air resistance can be further reduced.

As explained above, in the present invention, the speed indicator light is separated from the roof panel, and a rectifying duct that opens in the longitudinal direction of the vehicle is provided between the roof panel and the speed indicator light to direct the air flowing along the top surface of the roof panel. Since the flow is rectified, the turbulent flow that occurs behind the speed indicator light does not flow into the upper surface of the roof panel, and separation does not occur in the air flow on the upper surface of the roof panel, so the effect of turbulent flow on the vehicle's air resistance can be minimized. In addition, the length of the speed indicator light in the longitudinal direction of the vehicle is set shorter than the length of the rectifying duct in the longitudinal direction of the vehicle, and the rear end of the speed indicator light is positioned further forward of the vehicle than the rear end of the rectifying duct. Therefore, the flow of the turbulent flow generated at the rear of the speed indicator light onto the roof panel can be suppressed by the rectifying duct, and this also greatly improves the rectifying effect.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional speed indicator light;
3 is a perspective view showing another conventional speed indicator light; FIG. 4 is a perspective view showing an embodiment of the present invention; FIG. 5 is a side view of FIG. 4; FIG. 6 is a perspective view showing another embodiment of the present invention. 12... Roof panel, 13... Rectification duct, 15, 16... Speed indicator light.

Claims (1)

[Scope of utility model registration request] In a vehicle equipped with a plurality of speed indicator lights on a roof panel, a plate-shaped rectifying duct with the roof panel as a bottom wall is provided on the roof panel and opens in the front-rear direction of the vehicle, and the duct is installed on the top surface of the duct. A plurality of speed indicator lights are provided whose length in the longitudinal direction of the vehicle is set to be shorter than the length in the longitudinal direction of the vehicle, and the rear end of the speed indicator lamp is disposed further forward of the vehicle than the rear end of the duct. Features a mounting structure for vehicle speed indicator lights.