JPH0127927Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a rolling limiting device that limits rolling that occurs when a vehicle turns.

BACKGROUND ART Conventional trailers use torsion bars that utilize the torsional elasticity of steel bars to suppress rolling. However, in manufacturing such a torsion bar, special steel or the like must be used for the bar body, resulting in high cost and not being commercially available. Furthermore, since the torsion bar was twisted individually, its strength was unreliable, and if it broke, there was a risk of a serious accident.Furthermore, it had the disadvantage that it was not possible to adjust the strength against rolling.

Problems to be Solved by the Invention This invention reduces the cost of the torsion bar, which has traditionally been used to restrict trailer rolling, and reduces the cost.
The purpose is to increase reliability in terms of strength and to easily adjust the strength and weakness of rolling.

Means to solve the problem: The left and right adapters fixed to the axles of the rear wheels of the trailer are used as fulcrums for both ends of a rectangular leaf spring that is joined at the center with a pin and can be freely bent up and down. It consists of a plate spring adapter and a central pin connection part connected to the vehicle body via a bracket.

Function: In such a rolling limiting device, a leaf spring attached to the axle that bends in an angular shape bends evenly to the left and right around the center pin of the spring as the trailer turns. The load on the vehicle body becomes uneven due to rolling,
Bending loads in opposing directions are generated at two locations on the left and right between the central pin of the leaf spring and the adapter as fulcrums. As a result, due to the elasticity of the leaf spring, the reaction force of the bending load becomes a restoring force against rolling and acts in a direction to stabilize the vehicle body.

Embodiments Hereinafter, preferred embodiments of the rolling restriction device of the present invention will be described with reference to the drawings.

FIG. 1 shows a front view of a rolling restriction device according to an embodiment of the present invention. In the figure, 1 indicates an axle, and adapters 2 are provided on the left and right sides of the upper part of the axle 1. With these left and right adapters 2 as both fulcrums, a plurality of pieces are superimposed in the shape of a . A flat spring 4 is provided. The center portion of this V-shaped leaf spring 4 is connected with a pin 6 so that it can be freely bent up and down. Further, the joint portion has a structure in which a bracket 5 is placed over the leaf spring 4, and the leaf spring 4 and the bracket 5 can slide against each other. Brackets 7 are provided on the left and right sides of the leaf spring 4, and pillow blocks 8 are attached to the sides of the brackets 7. The upper part of the bracket 7 is connected to the main body frame of the trailer. Note that a stopper 9 is provided above the bent portion of the leaf spring 4.

FIG. 2 shows a side view of a rolling restriction device according to an embodiment of the present invention. In the figure, 3 indicates a swing arm, and the left end of the swing arm 3 is supported by a pin 11 on the main body frame 10. Further, the right end of the swing arm 3 is connected to an air spring receiver 1 fixed to the main body frame 10.
2 and is supported by an air spring 13, and a shock absorber 14 is also provided. The swing frame 3 is supported at both ends by pins 11 and air springs 13 in this way.
is fixed to the axle 1 with bolts 15.

The operation of the rolling restriction device configured as described above will be explained below.

In FIG. 1, the load that was evenly distributed on the left and right leaf springs 4 via the bracket 7 is now applied to the center of the leaf spring 4 due to the rolling force exerted by the trailer as it turns, as shown in FIG. Bending loads in opposite directions are generated at two places on the left and right between the pin 6 and the adapter 2, which are attached to each other, as fulcrums. This load is caused by the torsional force generated due to the inclination of the main body frame 10 being converted by the pillow block 8 provided on the bracket 7, and the plate spring 4
acts as a bending load.

As a result, the leaf spring 4 slides on the bracket 5 connected to it by the pin 6, leaving one side free and able to receive the bending load. As a result, the reaction force of the bending load acts as a restoring force against rolling due to the elasticity of the leaf spring 4, thereby stabilizing the vehicle body.

Next, a stopper 9 provided at the upper part of the bent portion of the leaf spring 4 is for preventing the leaf spring 4 from deflecting beyond the limit when receiving a very large impact from the road surface 17. .

In addition, as shown in Fig. 4, the rolling restriction device of the present invention, when the trailer moves up and down horizontally,
Since no bending load is generated on the leaf spring 4, the leaf spring 4
is simply bent at the central pin 6.

In FIG. 2, shocks and vibrations generated by unevenness of a road surface 17 are transmitted to the swing arm 3 through the tires 16 and the axle 1. This shock and vibration is caused by the swing arm 3 that moves around the pin 11.
An air spring 13 and a shock absorber 1 are provided between the right end of the main frame 10 and the main body frame 10.
Absorbed by 4.

Therefore, stable running is possible at all times against rolling, shock, and vibration.

Furthermore, the present invention can be applied not only to trailers but also to air suspensions for buses, trucks, and the like.

Effects of the invention As explained above, according to the rolling limiting device of the present invention, compared to the conventional torsion bar that receives the rolling load alone, by using multiple leaf springs stacked, Since not all of the springs are damaged, the reliability in terms of strength is greatly increased, and the strength of the load can be easily adjusted by changing the number of leaf springs. Furthermore, the use of plate springs makes it possible to manufacture products at a very low cost, which used to be expensive due to the use of special steel.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rolling restriction device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
The figure shows an operation diagram when the trailer turns to the left, and FIG. 4 shows an operation diagram when the trailer moves up and down horizontally. 1... Axle, 2... Adapter, 3... Swing arm, 4... Leaf spring, 5... Bracket, 6...
...Pin, 7...Bracket, 8...Pillow block, 9...Stopper, 10...Body frame,
11...pin, 12...air spring holder, 13
...Air spring, 14...Shock absorber, 15...Bolt, 16...Tire, 17...
road surface.

Claims (1)

[Scope of utility model registration request] The left and right adapters fixed to the axle of the rear wheels of the trailer are used as fulcrums for both ends of a square-shaped leaf spring that is joined with a pin in the center and can be freely bent up and down. A rolling restriction device characterized in that it is connected to a vehicle body through a bracket between the connecting portion and the vehicle body.