KR20020056505A - A bus air suspension for protecting abrasion bush thereof - Google Patents

Abstract

PURPOSE: A structure for preventing a bush of a bus air suspension from being worn out is provided to absorb the external force applied from a lower radius rod by converting the force to rotation force, thereby preventing the abrasion of the bush and increasing the durability of the bush. CONSTITUTION: A structure for preventing the bush abrasion of a bus air suspension includes a bush(6) mounted to a coupling portion between a lower radius rod(3) and a suspension supporter for converting the external force applied to the coupling portion into rotation force to distribute the external force, wherein the bush includes a pin bolt(6a) formed with a grease groove(6a') to be introduced with grease, an inner element(6b) inserted into the pin bolt, an outer element(6c) surrounding the inner element and pressed by the lower radius rod, and a distribution element(10) provided between the pin bolt and the outer element for distributing the external force applied by the lower radius rod and generating rotation force.

Description

A bus air suspension for protecting abrasion bush

TECHNICAL FIELD The present invention relates to a bush wear prevention structure of an air suspension for a bus. More particularly, the bush wear of an air suspension for a bus is designed to reduce the generation of noise while generating a rotational force to increase the abrasion resistance by applying a pressing force. The prevention structure is related.

In general, the suspension of the vehicle is provided to improve the driving stability and turning characteristics while absorbing the impact from the road surface, and the air suspension used in a large vehicle such as a bus among such suspensions is shown in FIG. 1. As shown, the upper radial lateral rods (1, 2) are mounted on the axle (AX), the air spring (4), the shock absorber (f), and the lower in order to improve the ride comfort of the vehicle and the handling feeling when operating the steering system. The radial rod 3 is mounted via the suspension supporter SS.

In this case, the rods 1, 2, and 3 are generally coupled to the axle AX and the suspension supporter SS via the bush 6 in order to improve durability due to the applied load.

In this way, among the rods 1, 2, and 3 coupled through the bush 6, the lower radial rod coupled to the suspension supporter SS so as to support reaction force in the front, rear, left, and right directions applied from the outside, in particular, (3) The bush 6 includes a pin bowl 6a fixed to the vehicle body side as shown in FIG. 2, an inner member 6b inserted into the pin bowl 6a, and the inner member 6b. It consists of an outer member 6c which is pressed by the lower radial rod 3 while wrapping.

However, the bush 6 continuously receiving the reaction force in the front, rear, left, and right directions applied to the lower radial rod 3 is characterized in that the outer member 6c is in contact with the rod 3. Not only the contact surface K is badly worn, but also the inner member 6b made of a plastic material inserted into the outer member 6c has severe wear on the contact surface K 'according to the contact with the pin pin 6a made of steel. There is a problem that occurs.

In addition, if the degree of abrasion generated in the bush becomes severe as described above, the axle (AX) trajectory of the vehicle is changed to reduce the handling performance of the steering system, and as a result, the axle (AX) is distorted, resulting in torsional driving Driving) phenomenon occurs.

Accordingly, the present invention has been made in view of the above, and has an object to be able to prevent wear as well as to enhance durability by converting the external force applied to the bush by the lower radial rod into rotational force.

In order to achieve the above object, the present invention provides an air suspension, a shock absorber, and a lower radial rod in addition to mounting an upper radial lateral rod on an axle to improve a ride comfort of a vehicle and a handling feeling when operating a steering device. It is mounted via a suspension supporter, the coupling portion of the lower radial rod and the suspension supporter is characterized in that the bush provided to convert the external force applied to the rotational force to be distributed.

1 is an exploded perspective view of a typical bus air suspension

Figure 2 is a cross-sectional view of the bush according to the prior art

3 is a cross-sectional view of the coupling according to the present invention

4 is a partial cross-sectional view taken along the line A-A of FIG.

<Description of the symbols for the main parts of the drawings>

1: upper carrier rod 2: lateral rod

3: Lower Radius Road 4: Air Spring

5: shock absorber 6: bush

6a: Pinbool 6a ': Grease groove

6b: inner member 6c: outer member

10: dispersion means 11: case

11a: Retainer 12: Bearing Pin

13: key

A: Axle SS: Suspension Supporter

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view of the bush according to the present invention, the air suspension of the present invention, the upper radial lateral rods (1, 2) to the axle (to improve the ride comfort of the vehicle and the handling feeling when operating the steering device) AX) and the air spring (4), the shock absorber (f) and the lower radial rod (3) is mounted via a suspension supporter (SS), the lower radial rod (3) and the suspension supporter (SS) of The coupling portion is provided with a bush 6 for converting the external force applied to the rotational force to disperse.

Here, the bush 6 is fixed to the vehicle body side pin fin (6a) is formed with a grease groove (6a ') in which grease flows into the outer peripheral surface, and the inner member (6b) inserted into the pin bolt (6a), The outer member 6c wrapped around the inner member 6b and pressurized by the lower radial rod 3 and an external force applied between the pin boat 6a and the outer member 6c and applied from the lower radial rod 3 Dispersing means 10 for generating a rotational force while dispersing.

In addition, the dispersing means 10 is a case 11 provided between the pin bowl 6a and the inner member 6b, and retainers 11a formed at equal intervals in the case 11, as shown in FIG. ) Is composed of a bearing pin 12 having a circular cross-sectional shape and inserted into the pin bowl 6a and rotated about the outer circumferential surface thereof, and a key 13 for engaging and fixing the case 11 with the inner member 6b.

Therefore, when the lower radial rod 3 receives reaction force and rotational force in the front, rear, left, and right directions by the external force applied to the suspension while the vehicle is running, the outer member 6c and the inner of the bush 6 are accordingly The member 6b is forced in the front, rear, left, and right directions.

At this time, the force is also applied to the dispersing means 10 coupled to the inner member 6b via the key 13 in the front, rear, left, and right directions, and thus the bearing pin of the dispersing means 10. (12) is rotated in contact with the outer diameter of the pinbot (6a) to distribute the applied external force.

As described above, according to the present invention, while converting the external force applied from the lower radial rod to the rotational force to the bush coupled to the lower support rod to the suspension supporter, the external force can be absorbed to prevent wear of the bush and also enhance the durability. It is effective.

In addition, the present invention prevents abrasion of the bush and thus does not change the axle trajectory of the initially set vehicle. Consequently, even after a long period of time, the steering performance of the vehicle is not reduced and the axle of the axle does not occur. Of course, there is an effect that the driving (morrow driving) phenomenon does not occur.

Claims (3)

The upper radial lateral rods (1, 2) are mounted on the axle (AX) and the air spring (4), shock absorber (f) and lower radial rod (3) to improve the ride comfort of the vehicle and the handling feeling when operating the steering system. ) Is mounted via a suspension supporter (SS), but the coupling part of the lower radiator rod (3) and the suspension supporter (SS) has a bush (6) provided with a bush (6) for converting and distributing the external force applied to the rotational force. Suspension bush wear protection structure. 2. The bush 6 is pin pin 6a with a grease groove 6a 'into which the grease flows into the outer circumferential surface of the bush 6, and an inner member inserted into the pin bolt 6a. 6b) is provided between the outer member 6c and the pinball 6a and the outer member 6c pressed by the lower radial rod 3 while surrounding the inner member 6b, and the lower radial rod 3 Bushing prevention structure of the air suspension for bus, characterized in that made of a dispersion means for generating a rotational force while dispersing the external force applied from the. 3. The dispersing means (10) according to claim 2, wherein the dispersing means (10) is inserted into a case (11) provided between the pin bowl (6a) and the inner member (6b), and a retainer (11a) formed at equal intervals in the case (11). And a bearing pin 12 having a circular cross-sectional shape rotated with respect to the outer circumferential surface of the pin boat 6a and a key 13 for engaging and fixing the case 11 with the inner member 6b. Bush wear protection structure of air suspension.