JPS633343Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a coupling coupler for coupling a trailer to a tractor.

For example, in a semi-trailer type coupled vehicle 1, a king pin 6 of a trailer 5 is generally coupled to a coupler 4 placed on a wheel base 3 of a tractor 2, as shown in FIG.

As shown in FIG. 2, the coupler 4 connecting the tractor 2 and the trailer 5 is a saddle 7.
The trailer 5 is supported by the saddle 7, and a jyo mechanism (not shown) attached to the lower center of the saddle 7 is connected to the king pin 6 of the trailer 5 to form a mechanism for transmitting traction force, braking force, etc. A typical example is a balancer shaft 8 provided below the trailer 7 to allow relative movement with the trailer by peaching and rolling.

This coupler 4 must securely fix the frame of the tractor 2 because a large longitudinal and vertical force of, for example, 10 tons acts on it, but in order to improve loading efficiency, a heavy system is not desirable, and recently The angle mounting method is often used because it has a simple structure, is lightweight, and reduces stress concentration on the frame. This angle-mounted coupler is installed on the tractor 2 as shown in Figure 2.
A side rail 9 is erected on a wheel base, an angle base 10 is attached to the side rail 9 using bolts, etc., and a coupler base 11 is mounted on the side rail 9.

The load that this coupler receives varies depending on the type of trailer, and it is necessary to adjust the attachment position of the coupler in the longitudinal direction in order to enable a single tractor to pull various types of trailers. For example, when connecting to a trailer with a small load,
The coupler should be located near the rear axle of the tractor so that most of the load is borne by the rear axle, and if the load is heavy, this position should be moved forward so that the load is borne by the front axle as well as the rear axle. Must be.

Conventionally, in the angle mounting type coupler, when adjusting the position, mounting holes are opened in the coupler base 11 in a shifted manner, and using these holes, the coupler base 11 is mounted in a shifted position. However, since a very large force is applied to the coupler base 11, if a large number of holes are opened, the excess thickness between the holes will be reduced, and there is a possibility that shearing will occur between the holes.
For this reason, the current situation is that a new coupler base must be created each time the coupler is offset.

In view of the above points, this invention aims to solve the economical problem of creating a new coupler base for each offset of the coupler. An intermediate base is provided with protrusions that come into contact with each other, and each of the through holes has the same pitch as the mounting holes opened in one of the protrusions of the intermediate base, and each of the through holes is at a position shifted by a predetermined length from each of the mounting holes. A plurality of intermediate bases are provided on the other protruding side, and the coupler base can be offset by a predetermined length by inverting the intermediate base.

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

In addition, in FIGS. 3 to 5, the same members as those shown in FIGS. 1 and 2 are given the same reference numerals.

In FIG. 3, a coupler 20 is constructed by attaching an angle base 10 to a side rail 9 erected on a wheel base 3 of a tractor 2 using a number of bolts, and interposing an intermediate base 21 between the angle base 10 and the coupler base 11. There is.

A bracket 22 is erected on the coupler base 11 attached to the intermediate base 21, and the balancer shaft 8 is supported by this bracket 22.
The second point is that saddle 7 is attached to this shaft.
It is similar to that shown in the figure.

As shown in FIG. 5, this intermediate base 21 is made of a pair of angle members having a U-shaped cross section, and one protruding piece 21a (on the coupler base abutting side) has two mounting holes 22 of a predetermined pitch P. 22, and the other projecting piece 22b (angle base contact side) has some through holes 23a, 23 having the same pitch as above.
a, 23b, and 23b have been established.

However, this mounting hole 22 and through holes 23a, 23b
The opening position is when this intermediate base 21 is reversed (the reversed state is shown by the dashed-dotted line in Fig. 5).
The positions of both holes are shifted by Δl.

Next, the action will be explained.

When a light trailer is removed and a heavy trailer is coupled to a tractor, it is necessary to advance the position of the coupler 20 for the reasons described above.

In this case, the intermediate base 21 is reversed from the state shown by the solid line in FIG. 5 to the state shown by the dashed-dotted line in the figure. In the case where the through holes 23a and 2 are simply reversed in this way,
3b is positioned forward of the mounting hole 22 by Δl.

Therefore, if the coupler base 11 is to be attached to the intermediate base 21 in this state, it must be installed at a position advanced by Δl from the original position, that is, offset forward by Δl.

In this way, the coupler 20 can be easily offset by simply reversing the intermediate base 21.

Note that the illustrated intermediate base 21 has four through holes in the projecting piece 21b, but if there is a risk that shearing may occur between these through holes, the thickness of the intermediate base 21 may be adjusted appropriately. You can either change it or use only two through holes.

As is clear from the above description, according to the present invention, an intermediate base is provided between the angle base and the coupler base, and the intermediate base is provided with a protrusion that abuts on both bases.
A plurality of through holes of the same pitch as the mounting holes opened in one of the protrusions of the intermediate base are provided on the other protrusion so that each of the through holes is at a position shifted by a predetermined length from each of the mounting holes. By reversing this intermediate base, the coupler base can be offset by a predetermined length. Therefore, the coupler can be offset by simply reversing the intermediate base, and it is no longer necessary to create a new coupler base as before. This eliminates the need to offset the coupler, making it very economically advantageous. In addition, since there are various equipment such as winches on this wheelbase, offset work of the coupler must be carried out in a narrow space, but even in that case, it is possible to simply offset the intermediate base. This can be done quickly and safely since it is only necessary to reverse the process.

[Brief explanation of the drawing]

Fig. 1 is a side view of a general semi-trailer coupled vehicle, Fig. 2 is a sectional view of a conventional coupler, Fig. 3 is a side view of the main part of the coupler according to the present invention, and Fig. 4 is a line taken along the - line in Fig. 3. FIG. 5 is a perspective view of the intermediate base. 2...Tractor, 3...Wheelbase, 5...
Trailer, 6...Kingpin, 7...Saddle, 9
...Side rail, 10 ...Angle base, 1
1...Coupler base, 20...Coupler, 21...
Intermediate base, 21a, 21b... protruding piece, 22...
Mounting hole, 23a, 23b...Through hole, △l...Offset amount, P...Pitch.

Claims (1)

[Scope of utility model registration request] In a coupler for a coupled vehicle formed by angle mounting via an angle base fixed on a wheel base of a tractor, an intermediate base having a protruding piece that comes into contact with both bases is provided between the angle base and the coupler base, A plurality of through holes with the same pitch as the mounting holes opened in one protrusion of the intermediate base are opened on the other protrusion so that each of the through holes is at a position shifted by a predetermined distance from each of the mounting holes. A coupler for connection, which is configured such that the coupler base can be offset by a predetermined length by reversing the intermediate base.