KR20050010439A - Rear suspension in bus - Google Patents

Abstract

PURPOSE: A rear suspension for a bus is provided to hold force applied on an axle and driving and braking torque by integrating and installing a rigid part and a flexible part at a lower radius rod in an X shape. CONSTITUTION: A lower radius rod(10) combines with both vehicle wheels under an axle for transmitting driving force by connecting the vehicle wheels. One end of the lower radius rod is joined with a pair of support beams(1) on which an air spring is placed and the other end is combined with an outrigger frame(2) connected with a lower part of a rear frame forming a rear vehicle body. The lower radius rod is composed of a rigid part(11) forming the central portion and having strong durability against torsion or deformation in receiving external force and flexible parts(12,13) widened from the rigid part, formed like an X, and combined with the support beam and the outrigger frame, respectively. The flexible parts are twisted or deformed to absorb the external force in receiving the external force.

Description

Rear suspension in bus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear wheel suspension for buses, and more particularly, to a rear wheel suspension for buses that enables the function of a stabilizer to be combined with a radial rod.

In general, suspension is connected to the axle and the body to prevent the axle from being transmitted directly from the road while the axle is being transmitted to the body, preventing damage to the body and cargo and improving ride comfort. The driving force or braking force of each wheel at the time of braking is transmitted to the body, and at the same time, it withstands the centrifugal force at the time of turning and maintains the correct position for each wheel.

Suspension apparatus mounted on a passenger vehicle among such suspension apparatuses is usually provided with a lower arm provided downward so as to face an upper arm provided upward between a knuckle equipped with a wheel and the vehicle body, and is provided at the lower arm portion and the body portion. As the shock absorber is installed to absorb the impact from the road surface, the stabilizer is made to maintain the turning stability when the vehicle is turning.

However, large vehicles that are commercial vehicles such as trucks and buses use independent suspensions that mainly use air, unlike suspension systems of such vehicles. Suspensions of such large vehicles have axles with wheels mounted on both sides. Vibration transmitted to the vehicle body in the up, down, left and right movements of the axle shaft using a lateral rod, such as a rod, or a radial rod, to connect the frames or to maintain the forward and backward positions. In addition to absorbing and attenuating this, the stabilizer is used to increase stability while preventing the suspension from twisting when the vehicle is turned.

Here, the lower radial rod and the upper radial rod support the driving force and the braking torque at the same time as supporting the forward and the lateral force of the axle, respectively, and the stabilizer serves to reduce the rolling of the vehicle body. Will be

However, the suspension device that shares the role of the external force acting by using each component in this way is complicated by its separate function of radiator rod and stabilizer, which increases the assembly process and decreases productivity. Will be.

In addition, the radial rod and the stabilizer is large in size due to the characteristics used in a large bus, the weight is also very heavy, there is a disadvantage that the increase in cost and the increase in the weight of the vehicle.

Therefore, the present invention has been invented in view of the above, and by performing a stabilizer function to control rolling during turning in the radial rod, the manufacturing cost and vehicle weight can be reduced as well as the parts and assembly process of the suspension device. The purpose is to make it.

The present invention for achieving the above object, the other end of the rear vehicle body while the other end is coupled to the pair of support beams on which the air spring is placed while being coupled to both wheel parts from the lower part of the axle connecting the two wheels to transfer the driving force The lower radial rod is fastened to the outer logger frame which is joined to the lower part of the rear frame.

Rigid parts that have strong durability against torsion or deformation when they are formed in the center part, and open to both sides of the rigid parts and form an overall X (X) shape, are fastened to the support beam and the outer frame, respectively, When torsion or deformation occurs, it is characterized by consisting of a flexible part that absorbs external forces.

1 is a schematic configuration diagram of a rear wheel suspension for a bus using a lower radial rod according to the present invention

2 is a side configuration diagram of a rear wheel suspension for a bus using a lower radial rod in accordance with the present invention

Figure 3 is a deformation state when turning the lower radial rod in accordance with the present invention

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

1: Support Beam 1a: Fixed Axis

1b: plate 1c: split pin

2: outer gear 2a: fixed end

2b: fixing member 10: lower radial rod

11: rigid part 12,13: flexible part

12a, 12b, 13a, 13b: connection rod 12 ', 13': fastening end

12 ".13": Mass 20: Upper Radius Road

A: Axle F: Body frame

W: Wheel

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

1 is a schematic configuration diagram of a rear wheel suspension for a bus using a lower radial rod according to the present invention, the present invention is to connect the two wheels to achieve a vehicle width and a mounting shaft formed on the center of the axle for transmitting the driving force The upper radial rod 20 coupled between the rear frames provided at both sides, the support beam 1 on which the air spring is placed while being coupled to the lower part of the axle at the rear frame portion, and both support beams 1 having one end spaced from each other. The lower end rod 10 is formed in an approximately X (X) shape so as to be fastened at intervals from each other in the outer girder frame 2 coupled to the lower portion of the rear frame.

Here, the lower radial rod 10 is a rigid part (11) having a strong durability against torsion or deformation when the external force is applied while forming the central portion thereof, and the X and the X (X) Consisting to the support beam (1) and the outer girder frame (2) to form a shape, when the external force is applied to the flexible beam (12, 13) to absorb the external force generated by the distortion or deformation, the flexible part (12, 13) is formed to have a cross-section with the rigid part 11 at its peak and its thickness gradually decreasing.

In addition, the support parts 1 and the outer parts of the flexible parts 12 and 13 are extended to the end portions of the connecting rods 12a, 12b, 13a, and 13b, which are bent from the rigid part 11 and bent in a horizontal direction at a predetermined position. Fastening ends 12 ′ and 13 ′ fastened to the rigger frame 2 are formed.

Here, the fastening ends 12 'and 13' are hollowed out, respectively, and a hollow rubber material 12 " .13 " is padded therein.

On the other hand, the coupling structure of the support beam (1) and the coupling end (12 ', 13') is coupled to the fixed end (1 ') protruding to the inner side of the pair of support beam (1) facing each other 13 '), the mass 12 ". 13 " portion is fitted, and the plate 1b is fitted with the fixed shaft 1a to fix the side surfaces of the fastening ends 12', 13 ', and the fixed shaft 1a. Split pin (1c) is fastened to the end of the end to block the separation of the fastening end (12 ', 13').

In addition, the coupling structure between the outer girder frame 2 and the fastening ends 12 ′ and 13 ′ is fixed to the fixed end 2 a protruding from the outer girder frame 2 through the fixing member 2 b. The fixing member 2b is fixed to the mass 12 ".13" of the fastening ends 12 'and 13' or fixed using a nut screwed to the fixing member 2b.

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

The present invention connects both rear wheels and is coupled to the lower portion of the axle that transmits the driving force, and a pair of support beams (1) on which an air spring for absorbing and buffering the shock transmitted to the vehicle body is placed, and an outer coupled to the lower portion of the rear frame. When the lower radial rod 10 is engaged between the rigger frames 2, the lower radial rod 10 acts as a stabilizer while at the same time acting as a stabilizer to reduce rolling of the vehicle body during rolling of the vehicle. It will act to support the force in the forward and backward directions.

That is, the support beams 1 are provided with fastening ends 12 'and 13' formed at end portions of the connecting rods 12a, 12b, 13a, and 13b, which form the flexible parts 12 and 13 of the lower radial rod 10, respectively. ) And the outer radiator frame 2, the lower radial rod 10 is formed between the support beam 1 and the outer girder frame 2 at the lower portion of the upper radial rod 20. Shape.

Accordingly, except in the case of turning, which causes rolling, as shown in FIG. 2, the axle A and the lower radial rod 10 and the upper radial rod 20 having one end coupled thereto are four-linked. According to the structure, respectively, it acts as a trajectory according to the set geometry (Geometry) characteristics, wherein the upper radial rod 20 serves as a guide while the lower radial rod 10 maintains its shape without deformation due to torsion It will play a role.

However, when the vehicle is turned and rolling is applied, the lower radial rod 10 is connected to the support beam 1 and the outer girder frame 2 by the difference in the force applied between the height of the left and right body and the left and right body. Flexible parts 12 and 13 made of X-shaped connection rods 12a, 12b, 13a, and 13b fixed through both fastening ends 12 'and 13', and rigid parts formed at the central portions thereof. The difference in deformation is generated between (11).

That is, when the vehicle is turned and rolling occurs, as shown in FIG. 3, the rigid part 11 of the lower radial rod 10 is not deformed, while the flexible part 12 integrally connected to the rigid part 11 is formed. 13, since both ends of the support beam 1 and the outer girder frame 2 are fixed, the lower radial rod 10 has both the flexible parts 12 and 13 in the rigid part 11 with respect to each other. In the wrong way, the twisting action of the stabilizer is performed simultaneously.

As described above, according to the present invention, the lower radial rod is formed integrally with the torsional deformation portion and the relatively large deformation portion with the torsional deformation, and is mounted between the vehicle widths in an X (X) shape to be applied to the axle. In addition to supporting the force, driving and braking torque, it is also possible to simultaneously act as a stabilizer that controls the rolling acting when the vehicle turns by torsional deformation.

In addition, since the present invention does not use a stabilizer, there is an effect of reducing productivity and increasing vehicle weight by reducing components while reducing components.

Claims (3)

Both ends are connected to both wheels (W) from the lower part of the axle that transfers the driving force by connecting both wheels, and one end is fastened to the pair of support beams (1) on which the air springs are placed. Lower radial rod 10 is fastened to the combined outer girder frame (2) Rigid part 11, which has a strong durability against torsion or deformation when the external force is applied while forming the central part thereof, and is opened to both sides of the rigid part 11 to form an overall X (X) shape, respectively, and the support beam 1 and A rear wheel suspension for a bus, comprising a flexible part (12, 13) that is fastened to the outer girder frame (2) and torsion or deformation occurs when an external force is applied to absorb the external force. 2. A rear wheel suspension for a bus according to claim 1, wherein the flexible part (12, 13) is formed with a rigid part (11) as a peak and has a cross-section gradually decreasing in thickness. The fastening according to claim 1, wherein a hollow rubber material (12 ".13") is padded therein at the end portions of the connecting rods (12a, 12b, 13a, 13b) forming the flexible parts (12, 13). The stages 12 'and 13' are fitted to the fixed shaft 1a protruding to the inner side of the pair of support beams 1 opposed to each other, and the plate 1b positioned at the side thereof and the fixed shaft 1a to be fixed thereto. The end portion of the fixed through the split pin (1c) is fastened, A fastening end 12 'having a hollow rubber material 12 " .13 &quot; padded therein at opposite ends of the connecting rods 12a, 12b, 13a and 13b constituting the flexible parts 12 and 13; 13 ') is a rear wheel suspension for the bus, characterized in that the fixing member (2b) is fixed to the fixing end (2a) protruding from each other in the outer frame (2).