KR19990058556A - Rear two-axis torsion bar suspension of car - Google Patents

Abstract

The present invention relates to a rear two-axis torsion bar suspension of an automobile, in particular a base bracket (54) positioned at an upper end to a vehicle body frame (51) and positioned between a rear front axle (52) and a rear axle (53), Two connecting brackets 55f and 55r extending upwardly and downwardly of the rear front axle 52 and the rear rear axle 53 and one end of the two connecting brackets 55f and 55r are rotated one end. Two upper torque rods 60 and a lower torque rod each having a second end hinged to an upper end and a lower end of the base bracket 54 and half bevel gears formed at the ends of the hinge parts 62 and 67. 65 and bevel gears 72 and 77 supported on the base bracket 54 and formed at both ends thereof mesh with the half-bevel gears of the upper torque rod 60 and the lower torque rod 65 to form the two rear; When displacement occurs in the axles 52 and 53, By the upper torsion bar spring 70 and the lower torsion bar spring 75 to equalize or cushion the celebratory motion, the rear two-axis torsion of the car to simplify the shock absorbing structure and improve assembly It is about bar suspension.

Description

Rear two-axis torsion bar suspension of car

The present invention relates to a rear two-axis torsion bar suspension of a vehicle, in particular four torque rods are installed between two rear axles and the body frame, and a torsion bar spring is beveled geared between each pair of torque rods. Thereby, the rear two-axis torsion bar suspension of the vehicle to simplify the shock absorbing structure and improve the assembly.

In general, a large truck or a special vehicle employs two rear axles and two pairs of wheels on the rear wheel side.

In these two rear axle vehicles, the two-axis rear suspension supports the load on the body frame and absorbs vibrations and shocks from the ground to prevent these shocks from being transmitted directly to the body, passengers and cargo of the vehicle. In addition, it is a device that enables more stable running by suppressing irregular vibration of the wheel.

The two-axis rear suspension device uses a trunnion base 3 and a leaf spring 4 between the rear front axle 1 and the rear rear axle 2 as shown in FIG. Balanced member 16 having trunnion suspension that absorbs vibrations and shocks between the two rear axles 1, 2 and connected by a four-section link between a plurality of rear axles 11, 12 as shown in FIG. 2. And a rubber suspension using a rubber spring 19.

Here, when the structure of the conventional rear two-axis rubber suspension is described in detail with reference to FIG. 2, the balance rotation shaft 13 is positioned between the rear front axle 11 and the rear rear axle 12, and this balance rotation shaft 13 is provided. Is supported by a base bracket 14 fixed to the vehicle body frame 15. The balance rotating shaft 13 is provided with a balance member 16 which is gradually wider toward the upper side so as to be able to swing, and is disposed between the two rear axles 11 and 12 at both lower sides of the balance member 16. Two lower torque rods 17 swinging in accordance with the displacement of the axle are connected.

In particular, a plurality of rubber springs 19 are installed between the balancing member 16 and the two lower torque rods 17 around the balance rotation shaft 13, and the rubber springs 19 are the lower torque rods. The bolt 21 is fastened and fixed to the 17.

In addition, a connecting bracket 20 is installed on the rear front axle 11 and the rear rear axle 12 in the direction of the vehicle body frame 15, and at the upper end of the connecting bracket 20 of the base bracket 14. On both sides two upper torque rods 18 are also connected so as to be able to swing in accordance with the displacement of the axle.

The conventional rear biaxial rubber suspension configured as described above has two rear axles 11 and 12 and a connection bracket (2) when the same displacement occurs with respect to the body frame 15 in the two rear axles 11 and 12 while driving. 20) moves upward at the same time. At this time, the upper torque rod 19 and the lower torque rod 18 also move to the upper side connected to the rear axles 11 and 12 around the base bracket 14 and the balance member 16.

Accordingly, the vibration or shock transmitted from the two rear axles 11 and 12 to the vehicle body frame 15 side while all the rubber springs 19f and 19r between the lower torque rod 17 and the balance member 16 are compressed. While absorbing this, it makes the axial load uniform and at the same time performs the buffer function.

On the other hand, when only one of the rear front axle 11 and the rear rear axle 12 is displaced (assuming that the rear rear axle side), one rear axle 11 side is in a parallel state, but the balance axis of rotation The other rear axle 12 side is moved to the upper side or the lower side centering on 13, and the upper and lower torque rods 17 and 18 also rotate in the moving direction of the rear axle 12. As shown in FIG.

At this time, the rubber spring 19 between the balance member 16 and the lower torque rod 17 is tensioned or compressed to absorb the vibration transmitted from one wheel and between the two rear axles 11 and 12 in a short time. Make sure that the axial load of the

However, the conventional rear biaxial rubber suspension constructed and operated as described above has a suspension because a plurality of rubber springs 19 are bolted and fixed between the balance member 16 and the lower torque rod 17 to absorb vibrations and shocks. Not only is the structure complicated, there is a problem that the installation cost is increased and assembly is bad.

The present invention has been made to solve the above problems, by installing two torsion bar spring between the upper side and the torque rod to absorb the vibration and shock transmitted from the two rear axle, as well as simplify the suspension structure And to provide a rear two-axis torsion bar suspension of the car to reduce the cost and improve the assembly.

1 is a schematic perspective view of a trunnion rear biaxial suspension,

2 is a configuration diagram showing a rear two-axis rubber suspension of a conventional vehicle,

3 is a block diagram illustrating a rear two-axis torsion bar suspension of a vehicle according to the present invention.

4 is a perspective view in the direction "A" of FIG.

5 is an operational state diagram of the present invention.

<Explanation of symbols for main parts of the drawings>

51: body frame 52: rear front axle

53: rear rear axle 54: base bracket

54a: rotating shaft 54b: support

58: bearing 60: upper torque rod

65: lower torque rod 62, 67: hinge portion

62a, 67a: Half bevel gear 70: Upper torsion bar spring

75: lower torsion bar spring 72, 77: bevel gear

The rear two-axis torsion bar suspension of the automobile of the present invention for realizing the above-described problems includes a base bracket having an upper end fixed to a vehicle body frame and positioned between a rear front axle and a rear rear axle, and the rear front axle and the rear axle. Two connecting brackets extending upward and downward, and one end is fixed to the upper and lower sides of the two connecting brackets so that the other end is hinged to the upper end and the lower end of the base bracket, respectively, Each of the two upper torque rods and the lower torque rods having the bevel gears formed thereon, and the bevel gears supported on the base bracket and formed at both ends thereof, mesh with the half-bevel gears of the upper torque rod and the lower torque rods to form the two rear axles. When displacement occurs, the upper side to equalize or cushion the axial load by torsional elasticity Syeonba to a spring and being configured to lower the torsion bar spring.

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

The rear two-axis torsion bar suspension of the vehicle according to the present invention is fixed to the upper end of the vehicle body frame 51 and is located between the rear front axle 52 and the rear rear axle 53 as shown in FIGS. 3 and 4. Of the base bracket 54, the two connecting brackets 55f and 55r extending upward and downward of the rear front axle 52 and the rear rear axle 53, and the two connecting brackets 55f and 55r. Two upper torque rods each having one end fixed to the upper side and the lower side so that the other end is hinged to the upper end and the lower end of the base bracket 54, and half bevel gears are formed at the ends of the hinge parts 62 and 67, respectively. 60 and the lower torque rod 65 and the bevel gears 72 and 77 supported at the base bracket 54 and formed at both ends thereof are the half bevel gears of the upper torque rod 60 and the lower torque rod 65. And the displacement occurs in the two rear axles (52, 53) It consists of the upper torsion bar spring 70 and the lower torsion bar spring 75 which equalize or cushion the axial motion by torsional elasticity.

Here, the upper torque rod 60 and the lower torque rod 60 are the half bevel gears 62a, 67a of the hinge portions 62, 67 when the rear axles 52, 53 swing, and the base bracket 54 It is rotated about a rotating shaft 54a fixed to the bevel gears 72 and 77 of the torsion bar springs 70 and 75 to absorb shocks and vibrations.

In addition, the upper torsion bar spring 70 and the lower torsion bar spring 75 are bevel gears 72 and 77 at both ends are alternately coupled with both half bevel gears 62a and 67a in a diagonal direction, and the bevel gear ( Between 72 and 77, a long rod-shaped torsion bar having a torsional elasticity is rotatably supported by the base bracket 54.

That is, as shown in FIG. 5, when the same displacement occurs in the two rear axles 52 and 53, both bevel gears 72 and 77 of the torsion bar springs 70 and 75 are rotated in opposite directions, thereby twisting the torsion bar. If a displacement occurs in only one rear axle, the other side also rotates in the same direction through one bevel gear, to equalize the celebration of both rear axles.

Here, the torsion bar springs 70 and 75 are preferably supported by the bearing 58 so as to be rotatable to the fixing portion 54b protruding from the base bracket 54.

Referring to the operation of the rear two-axis torsion bar suspension of the vehicle according to the present invention configured as described above are as follows.

If two rear axles 52 and 53 have the same displacement with respect to the vehicle body frame 51 while driving a vehicle, the two rear axles 52, based on the base bracket 54 fixed to the vehicle body frame 51, The four upper and lower torque rods 60 and 65 connected thereto together with 53 are simultaneously moved upward or downward.

That is, when the rear front axle 52 and the rear rear axle 53 are moved upward at the same time as shown in FIG. 5A, the upper torque rod 60 and the lower torque rod 65 also move to the base bracket 54. It rotates upwards about the hinge parts 62 and 67 fixed to the rotating shaft 54a.

At this time, the half bevel gears 62a and 67a of the hinge parts 62 and 67 rotate according to the moving directions of the upper torque rod 60 and the lower torque rod 65, and the half bevel gears 62a and 67a. The bevel gears 72 and 77 of the torsion bar springs 70 and 75 which are engaged with each other are also rotated. Therefore, since both bevel gears of the torsion bar springs 70 and 75 rotate in opposite directions, the torsion bar is twisted to absorb the displacement generated between the body frame 51 and the two rear axles 52 and 53. It will act as a buffer.

Meanwhile, when only one of the rear front axle 52 and the rear rear axle 53 is displaced, when the rear front axle 52 is moved upward as shown in FIG. 5B, the rear front axle ( Torsion is applied to the torsion bar springs 70 and 75 through the upper and lower torque rods 60f and 65f on the 52 side, and the torsion bar springs 70 and 75 are twisted on the rear rear axle 53 side. The reaction force is generated as it is transmitted to the upper and lower torque rods 60r and 65r, and the axial load between the two rear axles 52 and 53 is equalized quickly.

The rear two-axis torsion bar suspension of the vehicle according to the present invention constructed and acting as described above is provided between two pairs of torque rods 60 and 65 provided on the body frame 51 and two rear axles 52 and 53. Since the torsion bar springs 70 and 75 are installed to absorb the axial load, the shock absorbing structure is simplified, thereby reducing parts and costs, and improving assembly performance.

Claims (4)

A base bracket having an upper end fixed to the body frame and positioned between the rear front axle and the rear rear axle, two connection brackets extending upward and downward of the rear front axle and the rear rear axle, and an upper side of the two connection brackets And two upper torque rods and a lower torque rod each having one end fixed to the lower side so that the other end is hinged to the upper end and the lower end of the base bracket, and half bevel gears are formed at the hinge end. When the bevel gears supported at the two ends and the bevel gears of the upper torque rod and the lower torque rod are engaged with each other and displacement occurs in the two rear axles, the upper torsion equalizes or cushions the celebration due to torsional elasticity. An automobile comprising a bar spring and a lower torsion bar spring Rear two-axis torsion bar suspension. The method of claim 1, The upper torque rod and the lower torque rod of the vehicle, characterized in that when the rear axle swings the half bevel gear of the hinge portion is rotated about the rotation axis fixed to the base bracket to rotate the bevel gear of the torsion bar spring Rear two-axis torsion bar suspension. The method of claim 1, The upper torsion bar springs and the lower torsion bar springs are alternately coupled with both bevel gears diagonally with both half bevel gears, and a long rod-shaped torsion bar having a torsional elasticity between the bevel gears is rotatably supported on the base bracket. Rear two-axis torsion bar suspension of the car characterized by The method of claim 1, The torsion bar spring of the rear two-axis torsion bar suspension, characterized in that supported by a bearing on a protruding part of the base bracket.