JPS628351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trailer elevating device for a trailer towing vehicle that transports long and extremely heavy raw materials and products.

Conventionally, trailers for transporting long and heavy objects are
Various removable attachments such as containers, flats, and pallets were used to load and transport various long and heavy objects.

However, in order to attach or detach these attachments to a trailer, it is necessary to lower the chassis of the trailer, crawl under the attachment, and then raise and lift it.

To do this, a lifting mechanism must be installed at the front and rear of the trailer to raise and lower the chassis of the trailer horizontally.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to equip a towing vehicle with a lifting device at a position connected to the trailer in order to raise and lower the front part of the trailer, and to equip the trailer with a lifting device to raise and lower the rear part of the trailer. The aim is to freely raise and lower the front and rear parts of the trailer by changing the stroke using hydraulic and pneumatic operations using a piston engine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below with reference to the drawings showing one embodiment.

1 and 2 show a trailer 2 being towed by a towing vehicle 1, both of which are equipped with the lifting device of the present invention.

The lifting device 3 that lifts and lowers the front part of the trailer is
A post 5 is erected upward at the center position of the front end of the chassis frame 4, and two frames 6, 6 are protruded in the front direction, and these are attached to the post 5 erected upward. They are placed on both sides of the front.

A bracket 8 is provided protruding from the rear end of the chassis 7 of the tow vehicle 1. The lower end of the bracket 8 is pivotally connected to the frame 6, and the upper end of the bracket 8 is connected to the post 5. A piston engine 9 is mounted on the upper end, and the piston 10 side is supported on the upper end of the bracket 8, and the cylinder 11 side is supported on the upper end of the post 5.

Incidentally, since the piston engine 9 is operated by hydraulic pressure, air pressure, etc., a power circuit such as a hydraulic circuit is provided, although not shown.

A driver's seat 12 that can move up and down and rotate is installed at one of the left and right positions at the front end of the chassis frame 4.

Also, a lifting device 1 that lifts and lowers the rear part of the trailer.
3 are arranged in two stages at the rear of the chassis frame 4.

The lifting devices 13 are each installed on beams 14 installed on the chassis frame 4.

The beam 14 has frames 1 on both sides of its lower end.
5 and 15 are fixed, and a moving port 17 for a piston engine 16 is formed in the center.

Each of the frames 15, 15 has a bracket 1 that rotatably holds wheels 18, 18 at its tip.
9 and 19 are pivotally supported.

The piston engine 16 is disposed passing through the moving port 17, and is located on the cylinder 20 side and on the piston 21 side.
Connecting portions 22, 22 provided on the upper portions of the brackets 19, 19 are pivotally supported on the sides.

Note that this piston engine 16 is also operated by hydraulic pressure, air pressure, etc., and is therefore provided with a power circuit such as a hydraulic circuit, although not shown.

Next, the operating state of the trailer towing vehicle lifting device of the present invention will be explained based on the above-mentioned configuration.

First, when attaching an attachment (not shown) such as a pallet to the trailer 2, the chassis frame 4 is lowered.

In that case, the piston engine 9 of the lifting device 3 is activated, the piston 10 is pushed into the cylinder 11, and its stroke is shortened.

Then, as the piston engine 9 descends, it pulls down the upper end of the bracket 8 and pushes down the upper end of the post 5, so the front part of the chassis frame 4 descends, and on the other hand, the towing vehicle 1 has the bracket 8 pulled down. , the rear part of the chassis 7 will be lowered and the front part will be raised, and they will move from the position indicated by the one-dot chain line to the position indicated by the two-dot chain line shown in FIG.

As the front part of the chassis frame 4 descends, the piston engine 16 of the lifting device 13 also operates in the rear part of the chassis frame, and the piston 21 is pushed into the cylinder 20 and its stroke is shortened.

Then, the piston engine 16 moves up the moving port 17 of the beam 14, and uses the shaft attachment part of the frame 15 as a fulcrum to pull up the bracket 19 and the wheels 18 held thereon, so that they move along the chain line shown in FIG. The vehicle moves from this position to the position indicated by the two-dot chain line, and the rear portion of the chassis frame 4 also descends.

Therefore, the piston engine of the lifting device 3 is operated again to push the piston 10 out of the cylinder 11 and extend its stroke.

Then, the piston engine 9 rises in the opposite direction as described above, pushing up the upper end of the bracket 8 and pulling up the upper end of the post 5, so the front part of the chassis frame 4 rises, while the towing vehicle 1 As bracket 8 is pushed up,
The rear part of the chassis 7 is raised and the front part is lowered, and they move from the position indicated by the two-dot chain line to the position indicated by the solid line shown in FIG.

As the front part of the chassis frame 4 rises, the rear part of the chassis frame 4 also operates the piston engine 16 of the lifting device 13 again, and the piston 21
is pushed out from inside the cylinder 20 to extend the stroke.

Then, the piston engine 16 moves down the moving port 17 of the beam 14 in the opposite manner to that described above, and moves the bracket 19 using the shaft attachment part of the frame 15 as a fulcrum.
and the wheels 18 held thereon are moved from the position indicated by the two-dot chain line to the position indicated by the solid line shown in FIG. 4, and the rear portion of the chassis frame 4 rises.

That is, the front and rear parts of the chassis frame 4 are raised horizontally, and the attachments (not shown) are lifted and attached to the trailer 2.

The reason why the chassis frame 4 does not recover to the position indicated by the dashed-dotted line in the raised state is that the load of an attachment (not shown) is applied thereto.

Furthermore, the trailer towing vehicle elevating device of the present invention is used to raise and lower the chassis frame 4 to prevent it from riding on a convex part of the road surface when towing the trailer 2 with the towing vehicle 1, in addition to when attaching and detaching various attachments to the trailer 2. It can be used for a variety of other purposes as well.

As described above, according to the trailer towing vehicle elevating device of the present invention, a piston engine is used and its stroke is changed by hydraulic and pneumatic operation.
The chassis of the trailer can be raised and lowered freely, and the raising and lowering state of the chassis can be set appropriately.

[Brief explanation of the drawing]

The figure shows one embodiment of the invention,
Figure 1 is a side view of the towing vehicle and the trailer being towed by it, Figure 2 is a plan view of the towing vehicle and the trailer being towed by it, and Figure 3 is an explanatory diagram of the lifting device that raises and lowers the front part of the trailer. , FIG. 4 is an explanatory diagram of a lifting device that lifts and lowers the rear part of the trailer. 1... Towing vehicle, 4... Chassis frame, 5...
...Post, 8...Bracket, 9...Piston engine, 14...Beam, 16...Piston engine, 1
8...Wheel, 19...Bracket, 22...Connection part.

Claims (1)

[Claims] 1 The front end of the chassis frame 4 and the rear end of the towing vehicle 1 are rotatably connected, and the upper part of a post 5 erected at the front end of the chassis frame 4 and the towing vehicle 1
The upper part of the bracket 8 protruding from the rear end is telescopically connected by a piston engine 9, and a set of two wheels 18, 18 are arranged at an appropriate interval at the lower part of the chassis frame 4. Both wheels 18, 18 are rotatably held by brackets 19, 19, and the inner parts of these brackets 19, 19 are rotatably attached to a beam 14 built on the chassis frame 4, and furthermore, both brackets 19,
A trailer towing vehicle elevating device characterized in that a piston engine 16 is extendably and retractably provided between connecting portions 22 and 22 provided at the upper part of a trailer towing vehicle.