JPH0131579Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is applied to brakes and cab-over vehicles.
This invention relates to improvements in the connection structure between a clutch fluid reservoir tank, a brake master cylinder, and a clutch master cylinder.

[Prior art] In cab-over vehicles, a brake master bag, master cylinder, and clutch master cylinder are often installed inside the cab, and the space behind the instrument panel in front of the driver, where these are installed, is restricted in terms of layout. In many cases, piping the reservoir hose is difficult. Therefore, the following method has been conventionally used.

Figure 1 shows the first example, in which 1 is a reservoir tank containing brake fluid and clutch fluid, 2 is a reservoir tank containing brake fluid and clutch fluid;
is the brake master back, 3 is the brake master cylinder, 4 is the clutch master cylinder,
Hose connection ports or nipples 1a and 1b provided on the reservoir tank 1 and hose connection ports or nipples 3 provided on the brake master cylinder 3
a, 3b with two brake fluid reservoir hoses 5A, 5B, and one hose connection port, or nipple 1c, provided on the reservoir tank 1 and one hose connection port, or nipple 4c, provided on the clutch master cylinder 4. Connect with the clutch fluid reservoir hose 5c.

Molded hoses are used as the reservoir hoses 5A, 5B, and 5C, but molded hoses have the drawback of being expensive.

Figure 2 shows a second conventional example, in which the brake master bag 2 is placed horizontally to save space in the front and rear, but the link mechanism becomes complicated, resulting in high costs, and it is also difficult to maintain. There's a problem. In FIG. 2, 7 indicates the brake pedal, and the arrow indicates the front of the vehicle.

FIG. 3 shows a third conventional example in which the reservoir tank 1 is installed at the center of the vehicle, but it has the disadvantage that it is difficult to replenish the reservoir tank 1 with liquid. In addition, in FIG. 3, 8 indicates a brake pedal.

In the past, this method had to be adopted because of the layout constraints mentioned above, as well as the fact that the nipples 1a and 1b for the brake fluid reservoir hose and the nipple 1c for the clutch fluid reservoir hose were installed at the same angle. This is because they were arranged horizontally in a row.

For example, in Japanese Utility Model Application Publication No. 54-34887, an oil guide pipe is connected to the clutch master cylinder from the side of the main oil reservoir, and the bottom of the main oil reservoir is directly connected to the auxiliary oil reservoir of the brake master cylinder.
A brake and clutch master cylinder sump arrangement is disclosed that allows brake clutch fluid to be supplied to both master cylinders. However, in such known technology, the reservoir tank and the master cylinder are integrally constructed, and when installed at the lower end of the instrument panel, as in a cab-over vehicle, the layout is limited, and especially in the case of large vehicles, the reservoir tank and the master cylinder are integrated. The increased size of the capacity cylinder makes installation difficult. Furthermore, the position of the master cylinder cannot be changed if the vehicle model is different.

[Problem to be solved] Therefore, the purpose of the present invention is to provide an easy-to-use layout even for large vehicles, to be compatible with special types of vehicles, and to allow the use of ordinary flexible straight hoses. The present invention provides a connection structure between a brake/clutch fluid reservoir tank, a brake master cylinder, and a clutch master cylinder.

[Configuration of the invention] According to the invention, in a connection structure in which a brake/clutch fluid reservoir tank provided in a cab-over vehicle is connected to a brake master cylinder and a clutch master cylinder by a reservoir hose, the reservoir tank and each master cylinder are connected to each other by a reservoir hose. It is installed at the lower end of the instrument panel separately from the cylinder, and the reservoir tank, brake master cylinder, and clutch master cylinder are arranged in this order in the lateral direction of the vehicle, and each hose attached to the reservoir tank is connected to the cylinder. The hose connection port for the clutch fluid reservoir hose is located on the side of the reservoir tank closer to the master cylinder, and the hose connection port for the brake fluid reservoir hose is located on the bottom of the reservoir tank. , the hose connection port for the brake fluid reservoir hose is
The hose connection port for the clutch fluid reservoir hose is located on the opposite side of the driver's seat from the hose connection port for the brake fluid reservoir hose. The hose connection port for the brake fluid reservoir hose is provided with an inclination angle with respect to the horizontal plane facing toward the clutch master cylinder, and the inclination angle of the connection port for the brake fluid reservoir hose is larger than the inclination angle of the connection port for the clutch fluid reservoir hose. It's summery.

[Operations and Effects of the Invention] According to the invention configured as described above, the following excellent effects can be obtained.

(i) Compared to the conventional model, in which the two hose connection ports for the brake fluid reservoir hose and the two hose connection ports for the clutch fluid reservoir hose are arranged in a row at the same mounting angle laterally, the reservoir tank Even when the distance in the height direction between the cylinder and each master cylinder is small, piping of each hose can be easily done, and the layout of the reservoir hose can be simplified.

(ii) There is no need to use an expensive molded hose as the reservoir hose, and an inexpensive ordinary flexible straight hose can be used by bending it within its permissible bending range.

(iii) The reservoir tank can be placed at the lower end of the instrument panel, making it easier to refuel.

(iv) Even if the brake master bag becomes larger, it can be handled appropriately by passing the clutch fluid reservoir hose over its top surface.

(v) Since the hose connection port for the clutch fluid reservoir hose is provided on the side of the reservoir tank near the clutch master cylinder side, the length of the clutch fluid reservoir hose can be small, which is advantageous in terms of layout.

(vi) Since the reservoir tank and each master cylinder are installed separately, when installing below the instrument panel, the layout can be easily done without interfering with the parts of the instrument panel.

(vii) Therefore, it is easy to adapt to various vehicle types.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 4 shows how the reservoir tank 1, brake master bag 2, brake master cylinder 3, and clutch master cylinder 4 are installed in the cabin of a cab-over vehicle.
As shown in the figure, the master cylinders 3 and 4 are separately installed at the lower end of the instrument panel 11, and the reservoir tank 1 and the brake master are installed in the lateral direction of the vehicle from outside to inside of the vehicle. A cylinder 3 and a clutch master cylinder 4 are arranged in this order. In the figure, 6 is a hose band that connects a hose to a hose connection port, that is, a nipple, 9 is an accelerator pedal, 10 is a reservoir tank lid, 11 is an instrument panel,
12 is the speedometer, 13 is the windshield,
14 indicates a door, and 15 indicates a driver seat.

FIG. 5 and FIG.
The hose connection port for the clutch fluid reservoir hose, that is, the nipple 1c is shown.
are master cylinders 3 and 4 of reservoir tank 1
Hose connection ports for the brake fluid reservoir hose, that is, nipples 1a and 1b are provided on the bottom surface 1Y of the reservoir tank 1. Then, in the direction of the hose connection port of the reservoir tank 1, that is, the nipple 1a,
The mounting angle of 1b and 1c with respect to the horizontal plane L-L is
Nipple 1a for brake fluid reservoir hose,
1b and the nipple 1c for the clutch fluid reservoir hose are different, and the mounting angle θ2 of the nipple 1c for the clutch fluid reservoir hose is the same as the mounting angle θ1 of the nipples 1a and 1b for the brake fluid reservoir hose.
has been smaller than. That is, θ1>θ2.

In this way, the connection port for the clutch fluid reservoir hose, that is, the nipple 1c is provided on the side surface 1x of the reservoir tank 1 closest to the clutch 7 and its master cylinder 4 side, at an angle θ2 that is relatively small with respect to the horizontal plane L-L. Therefore, the length of the clutch fluid reservoir hose 5c is sufficient, and by passing the clutch fluid reservoir hose 5c over the upper surface of the brake master bag 2 as shown in FIG. 4, the piping layout of the reservoir hose 5c can be changed. It is very easy to use, and it can also be used even if the brake master bag 2 becomes larger. Also, the mounting angle θ2 of the connection port for the clutch fluid reservoir hose, that is, the nipple 1c, and the connection port for the brake fluid reservoir hose, that is, the nipples 1a, 1.
By setting the relationship between the mounting angle θ1 and the mounting angle θ1 of In this case, an inexpensive ordinary flexible straight hose can be bent within its permissible bending range. Furthermore, the reservoir tank 1 can be disposed at the end of the instrument panel 11, making refueling easier.

[Summary] As described above, according to the present invention, the layout is easy, the hose can be straight, the length is short, it is particularly applicable to large vehicles, and it is extremely suitable as a connection structure for a reservoir tank.

[Brief explanation of the drawing]

Figures 1, 2 and 3 show conventional brake master backs, master cylinders, clutch master cylinders, and
It is a perspective view showing the layout of a reservoir hose. FIG. 4 is a perspective view showing the layout of the brake master bag, master cylinder, clutch master cylinder, and reservoir hose according to the embodiment of the present invention. 5 and 6 show the brake/clutch fluid reservoir tank used in the embodiment of the present invention, FIG. 5 is a perspective view, and FIG.
It is a side view seen from the direction of arrow A in the figure. 1...Reservoir tank, 1a, 1b, 1c...
... Hose connection port (nipple), 2 ... Brake master bag, 3 ... Brake master cylinder, 4 ... Clutch master cylinder, 5A, 5
B...Brake fluid reservoir hose, 5C...Clutch fluid reservoir hose.

Claims (1)

[Scope of utility model registration request] In a connection structure in which a brake/clutch fluid reservoir tank provided in a cab-over vehicle is connected to a brake master cylinder and a clutch master cylinder using a reservoir hose, the reservoir tank and each master cylinder are separately located below the instrument panel. The reservoir tank, brake master cylinder, and clutch master cylinder are arranged in this order in the lateral direction of the vehicle, and each hose connection port provided on the reservoir tank is connected to the clutch fluid reservoir hose. The hose connection port is provided on the side of the reservoir tank closer to the master cylinder, and the hose connection port for the brake fluid reservoir hose is provided on the bottom of the reservoir tank. The opening is provided on the driver's seat side, faces toward the brake master cylinder, and is inclined with respect to the horizontal plane, and the hose connection port for the clutch fluid reservoir hose is opposite to the hose connection port for the brake fluid reservoir hose. It is provided on the driver's seat side and is inclined with respect to the horizontal plane toward the clutch master cylinder, and the inclination angle of the hose connection port for the brake fluid reservoir hose is the same as the inclination angle of the connection port for the clutch fluid reservoir hose. A connection structure between a brake/clutch fluid reservoir tank, a brake master cylinder, and a clutch master cylinder, which is characterized by being larger.