KR100820474B1 - Adjustment apparatus of wheel alignment for vehicle with leaf spring - Google Patents

Abstract

A wheel alignment adjustment apparatus for a vehicle equipped with leaf springs is provided to reduce man hour taken when a spring is replaced by using a lower block on which pin housing units are biased. A wheel alignment adjustment apparatus for a vehicle equipped with leaf springs comprises a hanger bracket(41), a lower block(46a), a spring pin, and a bush. A spring eye unit is mounted on the hanger bracket. The lower block is detechable to the hanger bracket. The spring pin is inserted into the lower block and supports the spring eye unit. The bush is inserted in the spring pin. The lower block includes an outer block, and an inner block which are detached to the lower part of an upper block(42). A pin housing unit(45) is formed in a width direction of the vehicle at the center between the outer block and the inner block. The pin housing is biased on the lower block.

Description

Adjustment apparatus of wheel alignment for vehicle with leaf spring}

1 is a perspective view illustrating a conventional leaf spring applied vehicle,

2A to 2D are diagrams for explaining camber angles, king pin inclination angles, toe-in and caster angles, which are main factors for determining wheel alignment,

3 is a view for explaining a concept such as a straight axis alignment,

Figure 4a is a front view showing a conventional hanger bracket,

Figure 4b is a cross-sectional view A-A in Figure 4a,

Figure 5a is a front view showing a hanger bracket according to an embodiment of the present invention,

5B is a cross-sectional view taken along line B-B in FIG. 5A,

6A and 6B are front views illustrating a state in which the pin receiving portion of the lower block is eccentric.

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

40: spring eye part 41: hanger bracket

42: upper block 43: lower block (pin receiving portion is not eccentric)

43a: outer block 43b: inner block

44: bolt 45: pin receiving portion

46a, 46b: Lower block with eccentric pin receiving part

47: bolt fastening 48: spring pin

49: bush

The present invention relates to a wheel alignment adjustment device for a vehicle applied to the leaf spring, and more particularly, an eccentric structure instead of replacing with a spring having a different length to correct the wheel alignment in a vehicle connecting the vehicle body and the axle by the leaf spring. The wheel alignment of a leaf spring applied vehicle that further contributes to the reduction of man hour and productivity by adjusting the length of the spring by additionally developing the lower block having the lower part and replacing it instead of the existing uneccentric lower block. It relates to a control device.

Typically, a suspension of a vehicle functions to prevent vibration and shock continuously generated from the road surface of the vehicle while being transmitted to the frame (or the body body) through the wheel and the axle.

In addition, the suspension system of the vehicle improves the ride comfort of the occupant, prevents damage to the loaded luggage, prevents damage to the body parts due to excessive shock, and suppresses irregular vibration of the wheel to promote driving safety. Device.

The leaf spring, which maintains the ride comfort of the vehicle and connects the vehicle body and the axle, is widely used in commercial vehicles that carry high loads because of low manufacturing and installation cost and excellent strength maintenance required by the vehicle.

1 is a schematic view showing a suspension of a conventional leaf spring application vehicle, the clamp 14 is fastened to the center and both ends of the plate to integrate a plurality of leaf springs 11 having elasticity, the leaf spring 11 One end of the frame 12 or the lower portion of the vehicle body is coupled through the shackle 15, the other end is coupled via the hinge pin (16).

At this time, a stopper 17 is attached to the center of the upper end of the leaf spring 11 to prevent the upper end of the clamp 14 from being leaned in the front-rear direction (based on the body length direction).

When an external force of the road surface is transmitted from the load or axle 13 according to the load, the axle 13 and the frame 12 are moved up and down relatively, and the leaf spring 11 is moved to the shackle link portion 19. Due to this bending behavior, the reaction force can be formed to support the vertical movement.

Thus, the leaf spring 11 prevents the external force from being directly transmitted to the frame 12 by using the bending energy of the leaf, and determines the ride comfort, and is used when applied to a large truck that takes a large load The number of is increased.

The wheel alignment of the vehicle is an alignment state that correctly maintains the position, direction, and correlation of the wheels mounted on the vehicle.

The main factors for determining the wheel alignment are the camber angle formed by the center line of the wheel and the vertical line of the road surface (Fig. 2a), the kingpin inclination angle formed by the kingpin and the vertical line of the road surface (Fig. 2b), and the front of the wheel when the wheel is viewed from above. Toe-in (Fig. 2c), which shows a slightly inwardly adjusted condition, caster angle (in Fig. 2d), which indicates the inclination angle between the vertical line of the road and the center of the kingpin when the wheel is viewed from the side. If it is not linked, it may cause driving instability, abnormal tire wear and steering system inaccuracy.

2A to 2D, 10 is a wheel, 21 is an upper ball joint, 22 is a lower ball joint, 23 is an upper control arm, and 24 is a bottom. Lower ControlArm, 25 is the King-Pin and 26 is the Axle.

On the other hand, in the case of a passenger car to which the independent suspension is applied, it is not difficult to adjust the wheel alignment such as the front and rear axles by applying the link type suspension arm, but the rear axle of the commercial vehicle to which the leaf spring and the axle is applied. In the case of the conventional wheel alignment was not adjusted.

Table 1 shows the wheel alignment adjustment method of a commercial vehicle applying the leaf spring and the rigid axile.

As shown in Table 1, the toe of the front axle was adjusted by tie rods, but the wheel alignment of the rear axle was not measured to date.

However, only the adjustment of the front axle wheel alignment could not improve the performance of the vehicle. Among these factors, "toe" is the most important factor, and various studies and applications of the adjustment method have been conducted.

In particular, the toe of this rear axle must be specially managed as the rear wheel straight alignment, ie "Out of square".

FIG. 3 is a schematic diagram for explaining a concept of axial alignment, where total toe is a sum of individual toes, that is, Toe LH + Toe RH, and an out of square is an average of left toe value differences, that is, ( Toe RH-Toe LH) / 2, and parallelism (Parallellism) is the amount of torsion of the comparative axis relative to the reference axis torsion, i.e., Out of Square (Axle 1)-Out of Square (Axle 2). At this time, the larger the left / right tow value difference, the larger the torsion of the shaft.

However, the axial alignment must be importantly managed as it is a reference for the wheel alignment of the front axle, in particular the front axle tow.

Thus, when the spec out in the production line (spec out) to replace the spring to adjust the tow of the rear axle, which is accompanied by axle and spring removal has the disadvantage of requiring a lot of production and time.

Table 2 shows the measurement status of the wheel alignment of another company (Volvo / Scania).

In addition, complaints due to excessive production maneuver for the spring exchange, there is a demand for the development of an adjustable structure.

The present invention has been made in view of the above, and developed a lower block in which the pin receiving portion is eccentric in a vehicle equipped with a leaf spring by a bush in which the pin is press-fitted, and the eccentric instead of the existing uneccentric lower block. By replacing and replacing the lower block, it provides wheel alignment adjustment device of a leaf spring applied vehicle that can contribute to reducing man hour and productivity by adjusting the length of the spring without changing the spring with different length when correcting the wheel alignment. There is a purpose.

In order to achieve the above object, the present invention provides a wheel alignment adjustment device for a leaf spring applied vehicle,

Hanger bracket that is installed spring eye portion; A lower block detachably coupled to the hanger bracket; A spring pin inserted into the lower block and supporting the spring eye part; And a bush inserted into the spring pin.

In a preferred embodiment, the hanger bracket has an inner space in which the spring eye part and the bush are to be inserted, and an upper block of the “U” shape opened downwardly is integrally formed.

In a more preferred embodiment, the lower block is composed of an outer block and an inner block detachably coupled to a lower portion of the upper block, and a pin receiving portion in which a spring pin is inserted in the center of the outer block and the inner block is formed in the vehicle width direction. It is characterized by.

The lower block may further include a lower block in which the pin receiving portion is eccentrically formed, and is replaced with an eccentric lower block instead of an uneccentric lower block during wheel alignment adjustment.

In addition, the lower block is characterized in that the bolt is inserted through the bolt fastening hole formed in the vertical direction from both sides with the pin receiving portion in the center is detachably coupled to the upper block.

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

The leaf spring is a hanger bracket 31 for supporting the front eye (EYE) part 30 of the spring, a shackle bracket for supporting the rear eye part, and a shackle link part for constructing a degree of freedom of spring movement generated during vertical movement of the vehicle. Consists of.

4A and 4B are a front view and a cross-sectional view of a conventional hanger bracket, which will be described in more detail with reference to the structure of the hanger bracket 31.

The front eye portion 30 of the leaf spring is installed in a structure that is fastened to the hanger bracket 31 by the spring pin 33, the washer 34 and the nut 35 in which the bush 32 is inserted.

In order to replace the leaf spring is subjected to the following process.

1) Remove the tire from the axle.

2) Remove the axle and spring clamp (U-BOLT).

3) Remove the pin of hanger bracket and shackle bracket.

4) Remove and replace the spring

5) Then reassemble in reverse order.

The present invention has a main point in that the mounting method of the spring eye portion 40 and the shape of the hanger bracket 41 can be changed to adjust the straight alignment without changing the spring.

Through hole is formed in the existing hanger bracket 31, after inserting the bolt-shaped spring pin 33 through the through-hole, inserting the spring bush 32 in the spring pin 33 and inserting the spring Tighten washer 34 and nut 35.

5a and 5b is a front view and a cross-sectional view showing a hanger bracket according to an embodiment of the present invention.

Hanger bracket 41 according to an embodiment of the present invention is composed of an upper block 42 and a lower block 43, the cross section of the upper block 42 is a "U" shaped structure with an opening formed in the downward direction The lower block 43 is fastened to the lower end of the upper block 42 by bolts 44.

Figure 5a is a front view as seen from the left side of the rear axle, the structure of the hanger bracket 41 for supporting the front spring eye portion 40 on the longitudinal direction of the vehicle body.

The front of the upper block 42 is a regular pentagonal structure, the tab is formed in the lower end so as to fasten the bolts 44 in two places on both sides to prevent the occurrence of moment.

The lower block 43 has a rectangular structure, and a pin receiving portion 45 is formed at the center thereof. Here, the pin receiving portion 45 is a space into which the pin can be inserted into the spring, and the pin receiving portion 45 may be located at the center of the lower block 43 or may be installed in an eccentric form.

6A and 6B are front views illustrating a hanger bracket showing a state in which an eccentric lower block is mounted.

Here, an eccentric direction is marked on the lower block 46a to be installed in an eccentric form among the lower blocks, and the spring length is changed by replacing and mounting the eccentric lower block 46b instead of the uneccentric lower block 43. It can be adjusted.

In addition, the lower block 43 is a bolt fastening hole 47 is formed in the vertical direction with the pin receiving portion 45 in the center, the bolt 44 is inserted through the bolt fastening hole 47 to the lower block 43 It is installed in a structure that couples to the upper block 42.

FIG. 5B is a cross-sectional view of FIG. 5A taken along the vehicle width direction with the left side facing outward and the right side facing inward.

The upper block 42 has a "U" cross-sectional structure, a space in which the spring eye portion 40 can be inserted is formed in the center, and an opening is formed in the lower portion thereof.

The lower block 43 is coupled to the outer block 43a and the inner block 43b having a rectangular shape so as to be coupled to the outer side and the inner side of the upper block 42, and the outer block 43a and the inner block 43b, respectively. ) Is fastened to the upper block 42 by the bolt 44 inserted through the bolt fastening hole 47.

In addition, the spring pin 48 is inserted through the pin receiving portion 45, and the bush 49 is inserted into the spring pin 48 through the opening of the upper block 42.

Referring to the operation structure of the hanger bracket according to an embodiment of the present invention by such a structure as follows.

1) In the case where the pin receiving portion 45 of the lower block 43 according to the present invention is located at the center, the spring eye portion 40 is initially installed (original position).

2) If the pin-receiving portion 45 of the lower block 46a is eccentric to the left to adjust the OUT OF SQUARE, that is, if (front) <i (back), the spring as a whole Tense (FIG. 6A).

At this time, when the spring eye portion 40 is pulled forward based on the same spring length, the spring constant is increased to +2 (value is an example).

3) In contrast, when the pin receiving portion 45 is eccentrically to the right, i.e., (front)> b (back), the spring is loosened as a whole (Fig. 6b).

At this time, when the spring eye portion 40 is pushed backward based on the same spring length, there is an effect that the spring constant is reduced to -2.

According to the operation structure of the spring eye portion 40 as described above, the present invention provides a pin receiving portion 45 that can adjust the position of the spring eye portion 40 without changing the leaf springs of different lengths to adjust the axial alignment. By using only the lower blocks 46a and 46b having a simple structure formed by eccentricity, respectively, it is possible to drastically improve productivity and MAN HOUR by reducing the work time and cost to be performed at the time of spring replacement.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be carried out without departing from the spirit.

As described above, according to the wheel alignment adjustment device of the leaf spring applied vehicle according to the present invention, each of the pin receiving portion that can adjust the position of the spring eye portion without replacing the leaf spring of different length to adjust the shaft alignment By using only the eccentrically formed lower block, it is possible to drastically improve productivity and MAN HOUR by reducing the work time and cost that must be implemented during spring change.

Claims (5)

In the wheel alignment adjustment device of a leaf spring applied vehicle, Hanger bracket that is installed spring eye portion; A lower block detachably coupled to the hanger bracket; A spring pin inserted into the lower block and supporting the spring eye part; And A bush inserted into the spring pin; Wheel alignment adjustment device for a leaf spring applied vehicle, characterized in that configured to include. The method according to claim 1, Wheel hanger adjustment device for a leaf spring applied vehicle, characterized in that the hanger bracket has an inner space for inserting the spring eye portion and the bush is formed integrally with the upper block of the "U" shaped opening downward. The method according to claim 1 or 2, The lower block is composed of an outer block and an inner block detachably coupled to a lower portion of the upper block, and a leaf spring, in which a pin receiving portion into which a spring pin is inserted, is formed in a vehicle width direction at a center of the outer block and the inner block. Wheel alignment adjustment device of applicable vehicle. The method according to claim 3, The lower block further includes a lower block in which the pin receiving portion is eccentrically formed, and the wheel alignment adjustment device for a leaf spring applied vehicle, wherein the lower block is replaced with an eccentric lower block instead of an uneccentric lower block. The method according to claim 4, The lower block is a wheel alignment control device for a leaf spring applied vehicle, characterized in that the bolt is inserted through the bolt fastening hole formed in the vertical direction from both sides with the pin receiving portion in the center and detachably coupled to the upper block.

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