JP3141399B2 - Motorcycle oil cooler protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle oil cooler protection device for protecting a vehicle radiator such as a radiator or an oil cooler.

[0003]

2. Description of the Related Art A radiator for a vehicle, such as a radiator or an oil cooler, is disposed below a head pipe where a traveling wind is most likely to hit in a motorcycle. As shown in FIG.
An oil cooler mounting bracket 4 is attached to each of the down tube 2 suspended from the head pipe 1 and the two left and right lower tubes 3 connected to the down tube 2, and the oil cooler 5 is attached to the oil cooler mounting bracket 4. Installed on the vehicle body frame.

The oil cooler 5 thus mounted
Is protected by an oil cooler guard 6 so as not to be damaged when the motorcycle falls. The oil cooler guard 6 is formed in a U-shape as shown in FIG. 10 and is bolted to the guard attachment portion 7 of the oil cooler attachment bracket 4 or attached to the body frame of the down tube 2 or the lower tube 3 by a boss ( (Not shown) and is directly fixed to this mounting boss. In addition, the code | symbol 8 in a figure is:
An oil cooler mounting portion for mounting the oil cooler 5 to the oil cooler mounting bracket 4, and reference numeral 9 denotes a bracket fixing portion for mounting the oil cooler mounting bracket 4 on a vehicle body frame.

[0005]

However, in the radiator such as the oil cooler 5 described above, dedicated mounting bolts and guards for attaching the oil cooler guard 6 to the vehicle body frame (the down tube 2 and the lower tube 3). The mounting portion 7 is required, or mounting bolts and mounting bosses are required, which increases the weight and cost of the vehicle.

The present invention has been made in consideration of the above circumstances, and has as its object to provide an oil cooler protection device for a motorcycle that can reduce the weight and cost of the vehicle.

[Configuration of the Invention]

[0008]

According to the present invention, an oil cooler is arranged on a side of a down tube which is suspended downward from a head pipe of a motorcycle, and an oil cooler guide is attached to a rear side of the oil cooler. The guard body of this oil cooler guide is expanded downward when viewed from the front,
The oil cooler is formed in a substantially triangular shape so as to protect at least a lower portion of the oil cooler.

[0009]

According to the oil cooler protection device for a motorcycle according to the present invention, the front shape of the guard body of the oil cooler guard is formed in a substantially triangular shape which expands downward. It has a structure that is much stronger than an oil cooler guide against an impact force when the motorcycle falls down. For this reason, even if an impact force acts, the deformation is small, and the oil cooler can be reliably protected.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial front view of a motorcycle to which an embodiment of a motorcycle oil cooler protection device according to the present invention is applied, and FIG. 2 is an overall side view of the motorcycle of FIG. FIG. 3 and FIG. 4 are a view taken along the line III and a line IV in FIG. 1, respectively.

As shown in FIG. 2, a motorcycle frame 10 includes a down tube 12 suspended from a head pipe 11, a tank rail 13 extending from the head pipe 11 to the rear of the vehicle, and a tank rail 13 extending from the head pipe 11. Two left and right body tubes 14 hanging from the other end, and two left and right lower tubes 15 each having one end fixed to a lower portion of the down tube 12 and the other end fixed to a lower portion of each of the two body tubes 14. And two right and left seat rails 16 extending rearward from the upper end of the body tube 14, and a seat pillar 17 supporting the seat rails 16.

The above-mentioned tank rail 13 and down tube 1
2. The engine 18 is mounted around the lower tube 15 and the body tube 14. Also, head pipe 1
A head pipe reinforcement 19 is fixed between the down tube 12 and the tank rail 13 which are fixed to 1, and the periphery of the head pipe 11 is reinforced.

A front fork 20 is inserted into and supported by the head pipe 11 so as to be swingable about a central axis.
A handlebar 21 is attached to an upper portion of the front fork 20, and a front wheel 21 is attached to a lower portion of the front fork 20.
Are rotatably supported. Further, a body tube reinforcement 22 is fixed to the body tube 14, and a swing arm 23 is supported by the body tube reinforcement 22 so as to be swingable in a vertical direction.
A rear wheel 24 is rotatably supported at the free end of the swing arm 23. A seat 25 is installed on the seat rail 16, and a fuel tank 26 is installed on the tank rail 13 so as to straddle the tank rail 13.

In general, a radiator or an oil cooler as a radiator is arranged at a position where a traveling wind best hits a vehicle. In this embodiment, the oil cooler 27
It is arranged below the head pipe 11 of the vehicle body frame 10 where the traveling wind hits most.

In the oil cooler 27, as shown in FIG. 1, a plurality (layer) of oil tubes 31 are disposed between an upper tank 29 and a lower tank 30, and fins 32 are provided between the oil tubes 31. A support plate 33 is installed on both sides of the multi-layer oil tube 31.
Are arranged and configured. While the lubricating oil from the engine 18 flows in the oil tube 31 via the oil hose 34A, the heat of the lubricating oil is radiated and cooled by the traveling wind flowing between the oil tube 31 and the fins 32. This cooling oil is supplied to the oil hose 34
B is returned to the engine 18 (FIGS. 3 and 4).

An oil cooler bumper 37 having a protect bar 35 and a protect net 36 is installed in front of the oil cooler 27 in the vehicle. The oil cooler bumper 37 includes a bolt 38
(FIG. 3), the support plate of the oil cooler 27 is provided.
Is fixed to the The oil cooler 27 is protected by the oil cooler bumper 37 from obstacles such as flying stones and trees.

Next, the mounting structure of the oil cooler 27 will be described.

As shown in FIG. 1, an oil cooler mounting boss 28 is provided on each of the head pipe reinforcement 19 and the lower tube 15 in the vehicle body frame 10.
Is fixed. In the oil cooler 27, as shown in FIGS. 2 and 3, an oil cooler upper mounting portion 39 and an oil cooler lower mounting portion 40 are integrally formed on one support plate 33 arranged inside the vehicle. You. These oil cooler upper and lower mounting portions 39
8 and 9 are fitted into the mounting grooves 42 of the oil cooler cushion 41, as shown in FIGS.

A spacer 43 is interposed in the oil cooler cushion 41, and washers 44 and 45 are disposed on the left and right sides of the oil cooler cushion 41 in FIGS. Screw into female screw 47. By this screwing, the oil cooler 27 is attached to the oil cooler attachment boss 28 via the oil cooler cushion 41.

Since the oil cooler cushion 41 is made of an elastic material such as rubber, the oil cooler 27 is mounted on the oil cooler mounting boss 28 in a floating state, and the vibration from the vehicle body frame 10 causes the oil cooler 27 to vibrate. It is absorbed by the cushion 41.

Further, the oil cooler cushion 41
8 and 9, the mounting groove 42 is formed to be inclined by an angle θ with respect to a frame line 48 indicating the longitudinal direction of the vehicle body frame 10. As a result, the oil cooler 27 is inclined by the same angle θ with respect to a vertical line 49 with respect to the frame line 48, and the oil cooler 27 is inclined forward with respect to the vehicle.

In order to protect the oil cooler 27 attached as described above when the motorcycle falls, the oil cooler guard 50 shown in FIGS. 1 and 5 to 7 is used as a radiator guard. It is attached to the body frame 10 on the rear side.

The oil cooler guard 50 includes a guard body 51, a guard mounting spacer 52, and the washer 44 described above. The guard body 51 is shown in FIG.
Is configured to be a substantially triangular shape expanding downward. The lower end of the guard body 51 is shown in FIG.
Guard lower mounting portion 5
3 (see FIG. 7), and the washer 44 is fixed to the guard lower mounting portion 53. The guard mounting spacer 52 is welded to the upper end of the guard body 51, and the washer 44 is also fixed to the guard mounting spacer 52.

The pitch between the guard mounting spacer 52 and the guard lower mounting portion 53 is the same as the mounting pitch of the oil cooler upper mounting portion 39 and the oil cooler lower mounting portion 40 of the oil cooler 27 shown in FIGS.
The dimension is set between the pair of upper and lower oil cooler mounting bosses 28. Therefore, as shown in FIGS. 8 and 9, the oil cooler guard 50 has the guard mounting spacer 52 and the guard lower mounting portion 53 disposed together with the washer 44 between the oil cooler mounting boss 28 and the oil cooler cushion 41, and a bolt 46 tightens and fixes together with the oil cooler 27.

As described above, since the oil cooler guard 50 is fixed to the vehicle body frame 10 together with the oil cooler 27, a dedicated mounting bolt or a mounting portion (a conventional guard mounting) for mounting the oil cooler guard 50 is used. Section 7) is not required. Therefore, the weight and cost of the motorcycle can be reduced accordingly.

Since the guard body 51 of the oil cooler guard 50 is formed in a substantially triangular shape whose front shape is expanded downward, an impact force F (see FIG. 1,
It has a very strong structure as compared to FIG. 5). In the conventional U-shaped oil cooler guard 6 shown in FIGS. 10 and 11, the strength against the impact force F is weak, and when the impact force F acts, the oil cooler guard 6 is distorted into a parallelogram as shown by a two-dot chain line in FIG. I will. On the other hand, in the oil cooler guard 50 of this embodiment, the oil cooler 27 is not deformed even when the impact force F acts, so that the oil cooler 27 can be reliably protected.

The upper part of the oil cooler 27 in FIG.
Although not protected by the oil cooler guard 50, as shown in FIG.
Since the vehicle is covered by the cowling 54 covering the front portion of the vehicle including the fuel tank 26, it is sufficiently protected by the fuel tank 26 and the cowling 54, and there is no problem even when the vehicle falls down.

Further, since the oil cooler 27 can be inclined forward by the angle θ with respect to the vehicle, the capacity of the oil cooler 27 can be increased by changing the oil tube 31 of the oil cooler 27 from, for example, five layers to six layers. Cooling performance can be improved. At the same time, an increase in the front projected area of the oil cooler 27 with respect to the vehicle can be suppressed, so that an increase in air resistance of the vehicle can be avoided, and no inconvenience in design occurs.

Further, the oil cooler 27 has a forward inclination angle θ, and various types of oil cooler cushions 41 having different angles θ of the mounting grooves 42 are prepared, and an oil cooler cushion provided with the mounting grooves 42 having an appropriate angle θ is provided. It can be changed by selecting 41. Therefore, the change of the forward inclination angle θ of the oil cooler 27 can be performed very easily and at low cost.

Also, since the oil cooler mounting boss 28 only needs to be mounted vertically to the vehicle body frame 10, the cost of the vehicle body frame 10 does not increase.

In the above embodiment, the case where the radiator is the oil cooler 7 has been described, but the radiator may be a radiator. The radiator guard in this case is a radiator guard.

[0033]

As described above, according to the oil cooler protection device for a motorcycle according to the present invention, the front shape of the guard body of the oil cooler guard is formed in a substantially triangular shape that expands downward. It has a structure that is extremely stronger than the U-shaped oil cooler guide against impact force when the motorcycle falls down. For this reason, even if an impact force acts, the deformation is small, and the oil cooler can be reliably protected.

[Brief description of the drawings]

FIG. 1 is a partial front view of a motorcycle to which an embodiment of a motorcycle oil cooler protection device according to the present invention is applied.

FIG. 2 is an overall side view of the motorcycle of FIG.

FIG. 3 is a view taken in the direction of the arrow III in FIG. 1;

FIG. 4 is a view taken in the direction of the arrow IV in FIG. 1;

FIG. 5 is a front view showing the oil cooler guard of FIG. 1;

FIG. 6 is a view taken in the direction of arrow VI in FIG. 5;

FIG. 7 is a partial view taken along arrow VII of FIG. 5;

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 1;

FIG. 9 is a sectional view taken along the line IX-IX in FIG. 1;

FIG. 10 is an assembled perspective view showing a state of attachment of a conventional oil cooler and an oil cooler guard.

FIG. 11 is a front view showing an attached state of the oil cooler and the oil cooler guard of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body frame 11 Head pipe 12 Down tube 13 Tank rail 15 Lower tube 19 Head pipe reinforcement 27 Oil cooler 28 Oil cooler mounting host 33 Support plate 39 Oil cooler upper mounting part 40 Oil cooler lower mounting part 46 Bolt 50 Oil cooler guard 51 Guard body 52 Guard mounting spacer 53 Guard lower mounting part

Claims (1)

(57) [Claims] 1. An oil cooler is disposed on a side of a down tube which is suspended downward from a head pipe of a motorcycle, and an oil cooler guide is provided on a rear side of the oil cooler. An oil cooler protection device for a motorcycle, wherein the guard body is expanded downward in a front view, and is formed in a substantially triangular shape so as to protect at least a lower portion of the oil cooler having a substantially square shape.