JPS5845162Y2 - Master cylinder retreat prevention structure in the event of a car collision - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for preventing the mask cylinder from retreating in the event of a vehicle collision, which prevents the mask cylinder of a brake or clutch from retreating in the event of a vehicle collision.

Generally, as shown in FIGS. 1 and 2, a mask cylinder 1 of a brake or clutch in an automobile is usually installed in the front-rear direction on a dash panel (particularly a dash panel lower 4a) that partitions an engine room 2 and a passenger compartment 3. , are arranged to protrude into the engine room 2.

A steering shaft 9 that supports various pedals such as a brake pedal 5, a clutch pedal 6, an accelerator pedal 1, and a steering wheel 8 is arranged behind the mounting portion of the mask cylinder 1, and these are connected to the dash panel lower 4a. It is supported by a bracket 10 or 11 that is integrally fixed to the dash panel upper 4b.

Note that 12 is a cowl panel.

Therefore, by increasing the size of the mask cylinder 1,
Alternatively, as shown in the figure, a vacuum booster such as a brake booster 13 may be added between the mask cylinder 1 and the lower panel 48, and the mask cylinder 1 may protrude into the engine room 2. As a result, in the event of a collision of the automobile, there is a possibility that it will come into contact with a member installed in the engine compartment 2 that retreats due to a collision, such as the engine 14, and move rearward.

In particular, if the engine 14 is of a horizontal type, such as in F, F' cars (front engine, front drive cars), the possibility of the mask cylinder 1 moving backward becomes even higher.

When the mask cylinder 1 moves rearward, the displacement is transmitted to the steering wheel 8 via the brackets 10 and 11, causing the steering wheel 8 to move rearward, which is dangerous and may cause harm to the driver.

However, in order to solve this problem, the mask cylinder 1 can be arranged laterally, or the installation position can be changed to a position where it does not face the member that retreats in the event of a collision, but in this case, the mask cylinder 1 and the pedal The connection structure with other types becomes complicated, which is disadvantageous in terms of layout.

Accordingly, the present invention aims to provide a structure for preventing the mask cylinder from retreating in the event of a car collision, which is capable of preventing the mask cylinder from retreating in the event of a car crash by using the conventional mask cylinder mounting structure.

That is, in the present invention, the mask cylinder is attached to the dash panel that partitions the engine room and the single room so as to protrude into the engine room in the front-rear direction, and supports the steering wheel arranged in the vehicle interior behind the mask cylinder mounting part. In an automobile in which the steering shaft is attached to the dash panel via a bracket,
An inclined surface inclined with respect to the front surface of the mask cylinder is formed on an opposing portion of the member installed in the engine room that retreats in the event of a collision, facing the front surface of the mask cylinder at a predetermined distance in the longitudinal direction. The mask cylinder is swung by contact with the inclined surface.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

The conventional mounting structure of the mask cylinder has already been described with reference to FIGS. 1 and 2, so the same parts are given the same reference numerals and detailed explanation thereof will be omitted.

1 and 2 show a case where a brake master cylinder 1 is arranged protrudingly in the engine room 2, and the mask cylinder 1 is attached to a vacuum doubler fixed to the dash panel lower 48 at two points above and below the base 1a. A brake booster 13 as a force device is attached in the front and back direction with bolts 15 and nuts 16 on the front side, while in the engine room 2 there is a horizontally mounted engine 14 that serves as a member that moves backward in the event of a collision with the mask cylinder 1. An opposing portion 14a is installed to face the front surface of the engine 14 and is spaced apart from the front surface of the mask cylinder 1 of the engine 14 by a predetermined distance in the front-rear direction.
An inclined surface 11 that is inclined with respect to the front surface of the mask cylinder 1 is formed in the mask cylinder 1 .

That is, the inclined surface 17 rotates around a straight line connecting an imaginary plane parallel to the front surface of the mask cylinder 1 with the two upper and lower attachment points of the mask cylinder base 1 (points fixed by bolts 15 and nuts 16). (counterclockwise in Figure 2), and when the engine 14 moves rearward during a collision of a car, the mask cylinder 1 comes into contact with the inclined surface 1γ, so that the axis in the direction of the straight line l is the central axis. It is configured so that it can be swung as it is.

In contrast, in the above embodiment, when a car collides, the engine 14 installed in the engine room 2 moves rearward, and the inclined surface 17 formed on the opposing portion 14a of the mask cylinder 1 moves backward. Although it comes into contact with the front surface, the inclined surface 11 is inclined with respect to the front surface of the mask cylinder 1, and is also formed so as to be inclined in a direction around the straight line l with respect to the straight line l connecting the attachment points of the mask cylinder base 1a. For,
By pushing the front side of the mask cylinder 1 to the side along the inclined surface 17, the mask cylinder 1 swings about the axis in the direction of the above-mentioned straight line, so that the mask cylinder 1 does not move backward as it is. can be prevented.

In the above embodiment, the mask cylinder 1 for brakes was described, but the present invention can be similarly applied to mask cylinders for other clutches, and the present invention can be installed in the engine room 2 and retreated in the event of a collision to remove the mask. Although we have described the horizontally mounted engine 14 as a member that comes into contact with the cylinder 1, it can also be applied to other vertically mounted engines or components that move backward in the event of a collision, such as auxiliary equipment. An inclined surface that is inclined with respect to the front surface of the mask cylinder may be formed on an opposing portion of the retreating member that faces the front surface of the mask cylinder at a predetermined distance in the front-rear direction.

As explained above, according to the present invention, the connection structure between the mask cylinder and pedals is simple, and the conventional mask cylinder mounting structure is advantageous in terms of layout, and the inclined surface is simply attached to the member that retreats in the event of a collision. With this simple structure, the mask cylinder can be oscillated and reliably prevented from retreating in the event of a car collision, and therefore dangers caused by backward movement of the steering wheel in the event of a collision can be easily and reliably prevented. .

In addition, the base of the mask cylinder is moved along a straight line in the direction of the center axis of the swing of the mask cylinder due to contact with the inclined surface.
If it is attached at a point, the above-mentioned swinging due to contact with the inclined surface of the mask cylinder in the event of a collision can be more easily performed, and it is possible to more reliably prevent the mask cylinder from retreating in the event of a car collision. can.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the invention, FIG. 1 being a schematic side view;
FIG. 2 is a schematic plan view. 1... Mask cylinder, 1a... Base, 2... Engine room, 3... Vehicle interior, 4a... Dash panel lower, 4b... Dash panel upper 5...
Brake pedal, 6...Clutch pedal, 7...Accelerator pedal, 8...Steering, 9...Steering shaft, io, il...Bracket, 12.
... Cowl panel, 13 ... Flake booster, 14
...Engine 14a...Opposing portion, 15...Bolt, 16...Nut, 1γ...Slanted surface.

Claims (4)

[Scope of utility model registration request] (1) The mask cylinder is attached to the dash panel that separates the engine room and the single room, protruding into the engine room in the front-rear direction, and the steering shaft supporting the steering is placed in the room behind the mask cylinder mounting part. In the automobile that is attached to the dash panel via a bracket, an opposing portion of the member that is installed in the engine room and that retreats in the event of a collision faces the front surface of the mask cylinder at a predetermined distance in the front-rear direction;
A mask cylinder retreat prevention structure in the event of a car collision, characterized in that an inclined surface is formed that is inclined with respect to the front surface of the mask cylinder, and the mask cylinder is swung by contact with the inclined surface in the event of a collision. (2) The motor vehicle collision according to claim 1, wherein the mask cylinder is attached at two points on a straight line in the direction of the center axis of the swing of the mask cylinder due to its base coming into contact with the inclined surface. Structure to prevent mask cylinder from retreating. (3) The mask cylinder retreat prevention structure in the event of a car collision according to claim 1 or 2, wherein the mask cylinder is attached to the front of a vacuum booster fixed to a dash panel. (4) The structure for preventing the mask cylinder from retreating in the event of a motor vehicle collision according to claim 1, 2 or 3, wherein the member that retreats in the event of a collision is a horizontally mounted engine.