JPS6024653Y2 - Drawbar lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drawbar lifting device for tilting a cab when a trailer is mounted on a cab-over type rocking tractor.

Conventionally, when a locking tractor transports an empty locking trailer, it is necessary to prevent damage to the trailer during long distances.
In order to improve the driver's ride comfort, it is common to carry a trailer mounted on a tractor.

However, when the tractor is a cab-over type vehicle, the cab must be tilted if there is engine trouble while driving, but in the case of the three proposed devices, the cab may not be able to be tilted due to interference with the drawbar. The purpose is to lift the drawbar by placing the equipment jack on a simple bracket installed on the tractor's cab protector.

This invention is for cab-over type rocking tractors, and when it is necessary to tilt the cab due to engine trouble when carrying a trailer and transporting an empty vehicle, the drawbar of the trailer can be easily adjusted due to the jacking of the vehicle. In order to enable lifting, a jack cradle is provided on the protector, and the drawbar tip is lifted by the force of the jack placed on the cradle.

That is, in the present invention, a bolster 2 is provided at the rear of a frame 3 of a tractor 1 having a tiltable cab 11 at the front end, and tires 6.6' are provided on a trailer 5 in front and behind the bolster 2.
A tire stopper 4.4' is provided to support the trailer 5.
A cab protector 8 that supports a drawbar 7 provided on a trailer 5 is erected in front of the frame 3, and a jack 15 is attached and detached so that the cab 11 can be tilted on a pedestal 14 provided on the cab protector 8. This is a drawbar lifting device characterized by being freely mounted.

To explain in detail with reference to the drawings, conventionally, as shown in FIG. 1, the front and rear tire stoppers 4° 4' provided on the frame 3 across the bolster 2 of the tractor 1 and the bolster 2 control the longitudinal direction. The tires 6 and 6' of the trailer 5 are mounted on the trailer 5, and the tip of the drawbar 7 of the trailer 5 is fitted into and supported by the groove 9 of the cab protector 8 of the tractor 1, as shown in FIG. Prevents collapse.

Here, to explain the state in which the tractor 1 and the trailer 5 are transporting lumber (long) 20 as shown in FIG. 3, the lumber 20 is mounted on the bolster 2 of the tractor 1 and the bolster 10 of the trailer 5. However, in order to improve running stability, the ground height of the bolster 2°10 must be as low as possible.

Also, it is easy to understand that the tire stoppers 4 and 4' of the tractor 1 must be lower than the upper surface of the bolster 2 by the angle 08 necessary for pitching when the tractor 1 is traveling on rough roads. I can understand.

Returning to FIG. 1, the height of the bolster 2 is naturally low, but the height of the groove 9 of the protector 8 into which the drawbar 7 of the trailer 5 is fitted is set to ensure a position where the drawbar 7 does not come into contact with the gab 11. However, if this height is set too high, the rear axle 12 of the trailer and the trailer 5 will come into contact with each other, so this becomes the limit height.

Generally, in this condition, cab-over type tractor 1
In this case, the cab 11 needs to be tilted about the pin 19 when inspecting the engine, and if it is tilted to position 13, the drawbar 7 of the cab 11 and trailer 5 will interfere and cannot be rotated to the tilt position 13.

With this, if there is an engine problem during forwarding, inspection cannot be done and this is very troublesome.

Therefore, in the present invention, the height of the groove portion 9 of the tractor 1 is set at such a height that the rear axle 12 of the trailer 5 does not come into contact with the trailer 5, and when an engine trouble occurs, When the tractor is stopped or stopped, the drawbar 7 is lifted up by a jack to tilt the cab 11. In order to make it possible to tilt the cab 11, the present invention uses a protector 8 provided on the tractor 1 as shown in FIG.
A jack cradle 14 is provided on the holder, and one of the tools provided as standard equipment for the tractor 1 or trailer 5 is installed here.
Place the jack 15 on it, lift the drawbar 7 with the force of the jack 15, and move the cab 11 to the completely upward position 13.
This makes it possible to tilt the camera up to

At this time, the front tires 6 of the trailer 5 are connected to the tire stopper 4.
Although it is further away, there is no danger at all since tractor 1 has been stopped for engine inspection.

Note that when a wire 17 is hung on the lower surface of the rear end of the trailer 5 as a device for lifting the drawbar, and the wire 17 is pulled by a jack 15 provided at the rear end of the frame 3 via a bracket 16, the drawbar is lifted in the same way as the lifting device described above. Can be lifted.

As described above, according to the present invention, even when a trailer is mounted on a cab-over type tractor and an engine inspection is to be performed during transport, the drawbar of the trailer can be easily lifted and the cab can be tilted easily. In addition, the structure is simple, and the drawbar can be lifted simply by providing a jack on the cradle of the protector, so it is easy to manufacture and has extremely high practical value.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional example with a drawbar mounted on a tractor, Figure 2 is a side view of a civil engineering design, Figure 3 is an explanatory side view showing a tractor and trailer transporting lumber, Figure 4 is a view taken from arrow A in Figure 2, and Figure 5 is an explanatory view taken from line B-B in Figure 2. 1 is a tractor, 2 is a bolster, 3 is a frame, 4.4'
is a tire stopper, 5 is a trailer, 6°6' is a tire,
7 is a drawbar, 8 is a cab protector, 9 is a groove, 10
is the bolster, 11 is the cab, 12 is the rear axle (pin), 13 is the position, 14 is the pedestal, 15 is the jack, 16 is the bracket, 17 is the wire, 18 is the stopper, 19 is the pin, and 20 is the lumber.

Claims (1)

[Scope of utility model registration request] A bolster is provided at the rear of the frame of the tractor, which has a tiltable cab at the front end, and tire stoppers are provided in front and behind the bolster to support the tires provided on the trailer. A drawbar lifting device characterized in that a receiving cab protector is erected in front of a frame, and a jack is detachably placed on a pedestal provided on the cab protector to tilt the cab.