JPH033106Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a trailer coupling device.

(Prior art) Generally, when connecting a trailer to a tractor, 1
In order to be able to tow several types of trailers with a single tractor, the height of the coupler is mounted low, and the coupler can be raised and lowered to accommodate slight variations in the height of the king pin position. However, in conventional lifting devices, the support shaft of the coupler and the mounting position of the hydraulic cylinder are different, so the installation height of the lifting device is correspondingly high, making it unsuitable for chassis with high ground clearance and having a complicated structure. There was a problem that the strength was not desirable.

(Example) The present invention was made in view of such problems, and the following will explain examples of the present invention based on the drawings.
At the top of the chassis frame 2 at the rear of the tractor 1, there is a
A coupler 4 supported by a support shaft 3 is provided so as to be swingable back and forth. Bearings 5, 5 for supporting the shaft 6 are fixed to the left and right upper parts of the frame 2 in front of the coupler 4, and on the left and right sides of the inside of the frame 2 of the shaft 6 are arms whose one ends are pivoted to the support shaft 3. The other ends of 7 and 7 are pivotally supported.

On the other hand, on the left and right sides of the lower part of the support shaft 3, there are pivots 9,
The rod tips 11, 11 of the hydraulic cylinders 10, 10, which are rotated 9, are pivotally supported by the support shaft 3, respectively. Therefore, when the hydraulic cylinders 10, 10 are operated to expand and contract, the coupler 4 supported at the tips of the arms 7, 7 can be raised and lowered.

Further, a rectangular receiving member 12 is provided on the upper part of the frame at the bottom of the coupler 4, extending from left to right, and when the coupler 4 is in the lowered position, the arms 7, 7
The projecting ends 7a, 7a of the bracket 12 are configured to abut against the upper surface of the bracket 12. In addition, when the ground clearance of the chassis is high, the receiving member 12 may be mounted at a mounting position on the pistons (not shown) of the hydraulic cylinders 10, 10.
Since the coupler 4 can be lowered to a position where it does not bottom out, the mounting height of the coupler 4 can be adjusted to suit various chassis.

The trailer 13 has support legs 14 as well as an engaging portion 15 of the coupler 4 on the lower surface of the front end.
A king pin 16 is provided which is engaged with.

This invention has the above structure, and the trailer 13
When connecting the tractor 1 with the trailer 13 held horizontally by the support legs 14,
When the tractor 1 is moved backwards and the kingpin 16 of the trailer 13 is in a high position, the hydraulic cylinder 1
Coupler 4 supported by arms 7, 7 with 0 extended
is raised, the engagement position of the coupler 4 and the king pin 16 is adjusted, and the tractor 1 is further moved backward. As a result of this backward movement, the king pin 16 is engaged with the engagement portion 15 of the coupler 4, and the two are engaged and the trailer 13
and the tractor 1 are connected. At this time, Kingpin 1
6 is secured to the engaging portion 15 of the coupler 4 by a securing claw (not shown) so as not to separate from the engaging portion 15 of the coupler 4. Therefore, when the support leg 14 is retracted and the hydraulic cylinder 10 is retracted to place the coupler 4 on the chassis frame 2, the vehicle is ready to travel.

Conversely, when uncoupling the tractor 1 and trailer 13, first raise the coupler 4 using the hydraulic cylinder 10 so that the trailer 13 becomes horizontal, then extend the support leg 14 and use the support leg 14 to move the trailer 13 upward. 13 in a horizontal state, release the unillustrated lashing claws of the coupler 4, and then move the tractor 1 forward. The king pin 16 of the trailer 13 disengages from the engagement portion 15 of the coupler 4, and the tractor 1 and The trailer 13 is uncoupled.

In addition, when moving a short distance, such as within a factory premises, in addition to the above, the coupler 4 is raised with the trailer 13 connected, and the support legs 14 are kept extended to move the trailer 13 quickly to the desired location. can be moved to.

(Effect of the invention) According to this invention, the rod tip of the hydraulic cylinder that raises and lowers the coupler and the tip of the arm that supports the coupler are coaxial with the coupler's support axis, so the coupler and hydraulic cylinder pivot. In addition, by lowering the position of the bracket that contacts the arm protrusion, the installation height of the coupler can be lowered, so it can be applied to chassis with high ground clearance, and the hydraulic cylinder can be attached to the coupler. Since this method directly raises the 5th wheel load (vertical load on the coupler), the cylinder only needs to bear the load, which has the advantage of reducing force loss and simplifying the structure. be.

[Brief explanation of the drawing]

FIG. 1 is a side view of the tractor and trailer, FIG. 2 is a plan view showing this invented device, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a sectional view taken along line A-A in FIG. 3. 1... Tractor, 2... Palm frame, 4...
...Coupler, 7...Arm, 10...Hydraulic cylinder, 13...Trailer, 14...Support leg, 16...
...Kingpin.

Claims (1)

[Scope of utility model registration request] The arm has one end pivotally supported on a chassis frame at the rear end of the tractor, and the other end of the arm is pivoted on a support shaft that swingably supports the coupler, and one end is pivotally supported on the chassis frame via a bracket, A trailer coupling device in which the coupler can be raised and lowered by a lifting device comprising a hydraulic cylinder having a rod tip at the other end coaxially attached to the support shaft.