JPS6338148Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension system for a three-axle trailer.

The axle load of a vehicle is limited by the strength of the road and the structure of the vehicle, and if the weight of the load becomes large, a two-axle vehicle cannot handle the load, so a three-axle vehicle is used. This has the drawback of causing uneven tire wear due to sideslip when turning. If the load is light, two axles are sufficient, and using two axles also eliminates uneven tire wear. The present invention is characterized in that one axle of the three-axle trailer can be removed and used as a two-axle trailer.

To explain the drawings below, FIGS. 1A and 2B and 2 and 3 show a conventional three-axle trailer, where 1 is the underframe of the trailer, and 2 and 4 are appropriate means on the underside of the underframe 1. bearings mounted by, 5, 6,
7 is the front, middle, and rear wheels; 5', 6', and 7' are the axles of the wheels 5, 6, and 7, respectively; and 10 is the axle 5' attached to the front end, and the wheel 5 is connected through the axle 5'. It is a swinging beam that supports the underframe 1, and its middle part is supported by a pin 8 supported by the above-mentioned bearing 2 attached to the underside of the underframe 1, and it can swing up and down around the pin 8, and can be attached to and detached from the underframe 1. It is configured as follows. 11 is a swinging beam that supports the intermediate and rear wheels 6, 7;
The rear end portion of the underframe 1 is supported by a pin 9 supported by the bearing 4 provided on the lower surface of the underframe 1, and swings up and down about the pin 9. Reference numeral 15 denotes a wheel support rod that supports the intermediate and rear wheels 6 and 7 via axles 6' and 7' attached to both front and rear ends thereof, and the intermediate portion of the wheel support rod 15 is provided on the lower surface of the swing beam 11. The support arm 13 is supported via a pin 14 so as to be able to swing up and down. The rear end 12 of the swing beam 10 is in contact with the upper surface of the front end of the swing beam 11. The above configuration allows each axle and wheel to follow the unevenness of the road surface. The above configuration is conventionally known.

4 to 6 show embodiments of the present invention, and the same reference numerals as in FIGS. 1 and 2 indicate the same parts. In the figure, 16 is a through hole provided in the front part of the swing beam 11, and 3 is a bearing provided on the lower surface of the underframe 1, with the bearing portion facing the through hole 16. 17 is the through hole 16
A pin that is inserted through the pin 1 so that it can be attached and removed.
By inserting the pin 7, the swing beam 11 is fixed to the underframe 1 of the trailer, and by removing the pin 9, the swing beam 11 can swing up and down about the pin 9.

To explain the function and operation of the device of the present invention, when used as a normal three-axle trailer, the pin 17 is removed from the through hole 16 and the swing beam 11 is made to swing around the pin 9. For example, the suspension system, as shown in FIGS. 4A and 4B, can perform the same functions as the conventional three-axle trailer shown in FIGS. 1A and 1B. Next, when using it as a two-axle trailer, remove the wheels and swing beam 10 as shown in FIG. 11 is fixed to the underframe 1, it can easily be made into a two-axle trailer.
In this way, a 3-axle trailer can be used as a 2-axle trailer, and when using this as a 3-axle trailer, the through hole 16
Remove the pin 17 and remove the wheel 5 and swing beam 1.
If you attach 0, you can easily make it into a 3-axle trailer.

As mentioned above, the trailer suspension system of the present invention allows a three-axle trailer to be easily used as a two-axle trailer, so depending on the loaded weight, it can be used as a two-axle trailer. can be prevented.

The means for fixing the swinging beam 11 supporting the intermediate and rear wheels to the underframe 1 may be any suitable mechanism.

[Brief explanation of the drawing]

Figure 1 A and B show a conventional suspension system for a three-axle trailer, and Figure 2 is an enlarged sectional view taken along line A-A in Figure 1 B.
The figure is a schematic side view of a conventional three-axle trailer. Figures 4 to 6 show embodiments of the suspension system for the trailer of the present invention, and Figures 4A and 4B show examples of the suspension system for the trailer of the present invention.
5A and 5B show the case where the trailer of the present invention is used as a two-axle shaft. In each of the above figures, A is a plan view showing a part of the left half of the suspension system, and FIG. Figure 6A is a side view showing a cross section taken approximately along the line B-B in Figure 6. In each of the above figures, the underframe of the trailer is shown by a chain line. 1... Trailer underframe, 2, 3, 4... Bearing, 5, 5', 6, 6', 7, 7'... Wheel and axle, 8, 9... Pin, 10, 11... Rocking Moving beam, 1
2... Rear end of swing beam 10, 13... Support arm, 1
4...Pin, 15...Wheel support rod, 16...Through hole, 17...Pin.

Claims (1)

[Scope of utility model registration request] The middle part of a swinging beam 10 that supports the front wheels 5 of a three-axle trailer at the front end is removably pivoted to the underframe 1 of the trailer, and the swinging beam 11 that supports the intermediate wheels 6 and rear wheels 7 is attached to the underframe 1 of the trailer. The rear end portion is pivotally attached to the underframe 1, and the front portion of the swinging beam 11 is configured to be fixed to or detachable from the underframe 1, and when the front portion of the swinging beam 11 is not fixed to the underframe 1, the above-mentioned The tail end of the swinging beam 10 contacts the upper surface of the tip end of the swinging beam 11 to form a three-axle trailer, and the swinging beam 10 is removed from the underframe 1 and the front part of the swinging beam 11 is attached to the underframe 1. A trailer suspension device characterized in that it becomes a two-axle trailer when fixed to.