JPS64386Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tilt hinge device for rotating the cab (driver's cab) of a vehicle forward.

Generally speaking, in cab-over type trucks, where the engine is mounted below the driver's seat, the cab is connected to the vehicle body frame via a tilt hinge device, and the cab can be rotated forward around the tilt hinge device when inspecting the engine, etc. There are many things that can be done.

In this case, the tilt hinge device has a bracket 3 fixed to the floor member 2 of the cab 1, and a hinge bracket 5 rotatably connected to the bracket 3 with a pin 4, as shown in FIGS. 1 and 2. It has been set up.

Note that the distance L from the vehicle body frame 6 to the hinge pin 4 (hinge center) is set so that the front grill 7 of the cab 1 does not interfere with the bumper 8 at the front end of the vehicle body frame 6 when the cab is tilted.

By the way, in such a tilt hinge device, a hinge bracket 5 fixed to the vehicle body frame 6 is connected to a pin 4 on a bracket 3 fixed to the floor member 2.
Since they are rotatably connected, the distance H from the hinge center to the floor 9 of the cab 1 also becomes large.

For this reason, when the cab is normally fixed, the body frame 6
In contrast, the floor 9 of the cab 1 is located higher, and the leg space is narrowed accordingly. Also, distance L
If the distance between the bumper 8 and the grille 7 is reduced to avoid interference during tilting, the gap between the bumper 8 and the grille 7 becomes large, which is undesirable in terms of appearance.

The present invention aims to solve these conventional problems.

For this reason, in the present invention, in a tilt hinge device that supports the cab of an automobile so as to freely rotate with respect to the frame, a floor member having a substantially uniform U-shaped cross section in the front and back direction is provided along the lower surface of the cab floor at its upper open portion. A flange portion formed in the shape of a flange is fixed to the bottom surface of the cab floor, and a hinge bracket having a receiving portion having a substantially U-shaped cross section for receiving the floor member having an open upper part is fixed to the vehicle body frame. is rotatably connected to this hinge bracket via a hinge pin passing through the floor member and the hinge bracket, and the cab floor member itself becomes a cab-side tilt hinge bracket.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4. Note that the same reference numerals are used for the same parts as in FIGS. 1 and 2.

2 is a floor member of the cab 1, and 6 is a vehicle body frame. As shown in FIGS. 3 and 4, the floor member 2 is a member having a substantially U-shaped cross section that extends in the front-rear direction along the lower surface of the cab floor 9, and is provided to protrude from the lower surface of the cab floor 9.

A hinge bracket 5a is fixed to the vehicle body frame 6. Hinge support pieces 3a facing each other with a gap S for receiving the floor member 2 are formed on the upper part of the hinge bracket 5a.

Note that the hinge support piece 3a is provided with a vehicle body frame 6.
A hole 10 through which the hinge pin 4 passes is formed at a height of a predetermined distance L from .

On the other hand, the floor member 2 is formed with a shaft hole 11 that opens on both sides. Note that a collar 12 is fitted into the shaft hole 11.

The floor member 2 is rotatably connected to the hinge bracket 5a by a pin 4 located in the gap S of the hinge support piece 3a and passing through the hole 10 and the shaft hole 11.

Reference numeral 13 denotes a rubber bush fitted into the collar 12, which absorbs vibrations from the road surface transmitted from the vehicle body frame 6 to the cab 1 via the tilt hinge device.

Since the hinge bracket 5a is directly and rotatably connected to the floor member 2 of the cab 1 in this way, the distance H from the pin 4 to the floor 9 of the cab 1 is
can be significantly reduced compared to the conventional method.

Therefore, the position of the floor 9 of the cab 1 is lowered, and the leg space is expanded accordingly.

Furthermore, since the distance L from the body frame 6 to the hinge center is kept the same as before, interference between the bumper 8 and the grille 7 when the cab is tilted is avoided, and the gap between the bumper 8 and the grille 7 becomes larger. No problem.

In summary, according to the present invention, the floor member is directly supported by the hinge bracket and the gap between the vehicle body frame and the cab floor is narrowed, so the position of the cab floor is lowered and the leg space can be expanded accordingly. Furthermore, since the distance L is not shortened due to the lowering of the floor, there is no need to make the grille higher, and the appearance can be improved.

Furthermore, according to the present invention, the floor member has a substantially U-shaped cross section, and the hinge element on the cab side is configured within that cross-sectional structure, so that the installation rigidity on the cab side can be maintained sufficiently high. Since the tilt hinge can be constructed without changing the basic shape of the floor member, it also has the advantage of being easier to manufacture than conventional ones.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tilt cab showing a conventional device, Fig. 2 is a partially cutaway view in the direction of arrow A, Fig. 3 is a side view of a tilt cab showing an embodiment of the present invention, and Fig. 4 is a side view of a tilt cab showing a conventional device.
The figure is also a partially cutaway view taken in the direction of arrow B. 1... Cab, 2... Floor member, 3a...
Support piece, 4... Hinge pin, 5a... Hinge bracket, 6... Vehicle body frame.

Claims (1)

[Claims for Utility Model Registration] 1. In a tilt hinge device that rotatably supports the cab of an automobile with respect to a frame, a floor member having substantially the same U-shaped cross section in the front-rear direction along the lower surface of the cab floor is attached above the cab. A flange portion formed in the open portion is fixed to the bottom of the cab floor, and the upper portion thereof is approximately U for receiving the open floor member.
A hinge bracket having a receiving part with a shaped cross section is fixed to the vehicle body frame, and the floor member is rotatably connected to the hinge bracket via a hinge pin that passes through the floor member and the hinge bracket. A tilt hinge device for a tilt cab, characterized in that the member itself is a cab side tilt hinge bracket. 2. A tilt hinge device for a tilt cab according to claim 1, wherein the hinge pin passes through a bushing fitted to the floor member.