KR0180373B1 - Leaf spring independent suspension of a car - Google Patents

Abstract

By using two leaf springs, for the purpose of increasing the spring strength, improving the riding comfort, and improving the stability when turning;

A wheel support rotatably supporting the wheel; An upper control arm arranged laterally to connect an upper side of the wheel support to a vehicle body; A strut bar disposed in the vehicle body longitudinal direction and connecting the lower side of the wheel support with the vehicle body; A shock absorber which is disposed with the upper end slightly inwardly so that the lower end is hinged to the inner side of the wheel support and the upper end is connected to the frame; A first leaf spring assembly in which a plurality of leaf springs are gradually reduced in length to fasten the U bolts and the saddles in the center to form a single assembly, and both eyes are connected to the lower side of the wheel support; By fastening a plurality of leaf springs gradually decreasing in length to fasten the U-bolt and the saddle at the center, the front and rear ends of the child are hinge-fixed to the frame while being formed as one assembly and intersecting the upper portion of the first leaf spring assembly. Provided is a leaf spring type independent suspension of a vehicle comprising a second leaf spring assembly.

Description

Leaf spring type independent suspension of automobile

1 is a front view of the suspension according to the present invention.

2 is a side view of the suspension according to the present invention.

3 is a schematic configuration diagram of a conventional suspension device.

* Explanation of symbols for the main parts of the drawings

1L, 1R: Wheel support 2L, 2R: Upper control arm

3L, 3R: Strut Bar 4L, 4R: Shock Absorber

5: first leaf spring assembly 6: second leaf spring assembly

[Industrial use]

The present invention relates to a leaf spring type independent suspension of an automobile, and more particularly, by using two leaf springs, the leaf spring of a vehicle that can increase the spring strength, improve the ride comfort, and improve the stability when turning It relates to a type independent suspension device.

[Prior art]

Suspension in automobiles controls the position of the tire relative to the body when driving by connecting the axle and the body so that the position on the road surface of the tire can be placed in the most ideal state to maintain the best steering stability and the axle It is a device that prevents damage to the vehicle body or cargo and improves the ride comfort by not transmitting vibration or shock received from the road surface directly to the vehicle body.

Accordingly, the suspension system should be flexible in the up and down direction to alleviate the impact on the road surface, and the connection in the horizontal direction to overcome the driving force, the braking force, the centrifugal force during turning, etc., should be robust.

Suspension devices for satisfying the above requirements are classified into various types according to their structural characteristics. The present invention relates to suspension devices to which leaf springs and control arms are applied.

Suspension device to which the conventional leaf spring and the control arm is applied, the upper and lower control arms 104 (top and bottom) each of the wheel support 102 (103) for supporting the wheel 100, 101 as shown in FIG. A plate that is connected to the vehicle body via the 105, 106 and 107 so as to be able to move up and down with respect to the vehicle body of the wheels 100 and 101, and is responsible for cushioning during the lifting movement of the wheels 100 and 101. It is common to transverse the spring assembly 108 and connect the sliding 109 and 110 portions to the wheel supports 102 and 103 at both ends thereof.

[Problem to solve]

However, according to the suspension device as described above, one spring assembly is used, and the spring constant thereof is set so large that there is a problem in that the riding comfort is not good.

In addition, since the geometry of the suspension is determined by the length of the upper and lower control arms, the design freedom is not so good that there are many limitations in changing the characteristics of the suspension.

Therefore, the present invention has been made to solve the above problems, the object of the present invention by using two leaf springs, to increase the spring strength, improve the ride comfort, the stability of the vehicle that can improve the stability when turning It is to provide a leaf spring independent suspension.

[Means to solve the problem]

In order to realize this, the present invention includes a wheel support rotatably supporting the wheel; An upper control arm arranged laterally to connect an upper side of the wheel support to a vehicle body; A strut bar disposed in its longitudinal direction and connecting the lower side of the wheel support with the vehicle body; A shock absorber which is disposed with the upper end slightly inwardly so that the lower end is hinged to the inner side of the wheel support and the upper end is connected to the frame; A first leaf spring assembly having a plurality of leaf springs gradually decreasing in length to fasten the U bolts and the saddles in the center to form a single assembly, wherein both side eyes are connected to the lower side of the wheel support; By fastening a plurality of leaf springs gradually decreasing in length to fasten the U-bolt and the saddle at the center, the front and rear ends of the child are hinge-fixed to the frame while being formed as one assembly and intersecting the upper portion of the first leaf spring assembly. Provided is a leaf spring type independent suspension of a vehicle comprising a second leaf spring assembly.

The first leaf spring assembly and the second leaf spring assembly form support portions that project upwardly on the front and rear sides of the saddle of the first leaf spring, and the saddles of the second leaf spring assembly form projections having axial holes in the front and rear directions downward. To provide an independent suspension of the leaf spring of the car connected to the hinge pin.

The second leaf spring assembly provides a leaf spring independent suspension of a vehicle in which the front eye is fixed to the bracket with a sackle pin, and the rear eye is connected with the bracket via a sackle link.

[Action]

The two leaf spring assemblies are connected in series at the middle to cross each other in order to increase the strength while reducing the spring constant, thereby improving ride comfort. The transverse first leaf spring assembly serves as a cross member and a virtual lower In particular, the saddle connection point of the first and second leaf spring assemblies is moved upward so that the turning outer wheel becomes a negative camber when turning, thereby improving driving stability during turning. do.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 and 2 are front and side views of the suspension according to the present invention, in which wheels 10L and 10R are rotatably supported by wheel supports 1L and 1R.

The upper portions of the wheel supports 1L and 1R are connected to the frame 11 via the upper control arms 2L and 2R, and these connecting portions 20L, 20R, 21L and 21R are known and known. It is connected through the elastic bush as shown.

And the lower portion is connected to the frame 11 via the strut bar (3L) (3R) arranged in the longitudinal direction of the vehicle body, both connecting portions of these strut bar (3L) (3R) also through the elastic bush as known The connection is made.

As a result, the lifting and lowering of the wheel support 1L and 1R is performed in the motion trajectory of the upper control arm 2L and 2R and the strut bar 3L and 3R and the first leaf spring assembly 5. The cushion during the movement is made by the shock absorber (4L) (4R), the shock absorber (4L) (4R) is arranged with the upper end slightly inclined inward, the lower end of the wheel support (1L) The hinge is fixed to the brackets 40L and 40R protruding into the inner side of the 1R, and the upper end is connected to the brackets 41L and 41R formed in the frame 11 through the rubber bushes 42L and 42R. .

In addition, by stacking a plurality of leaf springs 50 gradually decreasing in length to fasten the U-bolt 51 and the saddle 52 in the center, the first leaf spring assembly 5 formed as one assembly is most Cylindrical eyes 53L, 53R are formed at both ends of the long leaf spring 50, and the eyes 53L, 53R have their brackets 40L formed below the wheel support 1L, 1R. It is hinged to 40R, wherein the longest leaf spring 50 is disposed to face downward for elasticity.

In other words, the first leaf spring assembly 5 is transverse to the vehicle body.

In addition, the second leaf spring assembly 6 longitudinally extending in the longitudinal direction of the vehicle body on the upper side of the first spring assembly 5 has a plurality of leaf springs 60 whose length is gradually reduced like the first spring assembly 5. By fastening the U bolt 61 and the saddle 62 at the center to form a single assembly, and cylindrical eyes 63F and 63R are formed at the front and rear ends of the longest leaf spring 60. Thus, the eyes 63F and 63R portions thereof are hinged to the brackets 64F and 64R formed on the frame 11.

In hinge fixing the second leaf spring assembly 6, the front eye 63F portion is fixed to the bracket 64F with a well-known shackle pin, and the rear eye 63R portion is a sackle link between the bracket 64R and the bracket 64R. It connects through 65.

Also, the saddle 62 located in the middle of the second leaf spring assembly 6 is hinged to the upper end of the saddle 52 of the first leaf spring assembly 5 so that when viewed from the front of the vehicle, the first spring assembly 5 can be rotated left and right, and the 2nd leaf spring assembly 6 can be rotated up and down.

To this end, the support portion 54 is formed to protrude upward and forward and above the saddle 52 of the first leaf spring assembly 5, and the saddle 62 of the second leaf spring assembly 6 protrudes downward. Formed, but formed by the shaft hole in the front and rear direction was coupled to the hinge pin (55).

In the drawings, reference numerals 56 and 67 are pads.

Such a suspension device is hinged to the two leaf spring assemblies 5, 6 intersecting with each other in the middle portion, thereby being connected in series to increase the strength while reducing the spring constant, thereby improving the riding comfort.

And the transverse first leaf spring assembly 5 serves as a cross member and functions as a virtual lower control arm, in particular the saddle 52 of the first and second leaf spring assemblies 5 and 6. The connection point of 62 is moved upward and the turning outer wheel becomes a negative camber at the time of turning, and the running stability at the time of turning improves.

[effect]

As described above, according to the present invention, by connecting two leaf spring assemblies in series, the spring strength is increased, the spring constant is lowered, and the riding comfort is increased, and the body side connection point of the virtual lower control arm is increased, thereby improving stability during turning. There are advantages to improving it.

Claims (3)

A wheel support rotatably supporting the wheel; An upper control arm arranged laterally to connect an upper side of the wheel support to a vehicle body; A strut bar disposed in the vehicle body longitudinal direction and connecting the lower side of the wheel support with the vehicle body; A shock absorber which is disposed with the upper end slightly inwardly so that the lower end is hinged to the inner side of the wheel support and the upper end is connected to the frame; A first leaf spring assembly in which a plurality of leaf springs are gradually reduced in length to fasten the U bolts and the saddles in the center to form a single assembly, and both eyes are connected to the lower side of the wheel support; By stacking a plurality of leaf springs gradually decreasing in length to fasten the U-bolt and the saddle in the center, the front and rear ends of the child is hinged to the frame while being formed as a single assembly and intersected on the upper side of the first leaf spring assembly The leaf spring type independent suspension of a vehicle comprising a second leaf spring assembly. The first leaf spring assembly and the second leaf spring assembly of claim 1, wherein the first leaf spring assembly and the second leaf spring assembly to form a support protruding upwards on the front and rear sides of the saddle of the first leaf spring, the saddle of the second leaf spring assembly is axially downward in the front and rear direction Independent suspension of the leaf spring of the car connected to the hinge pin by forming a protrusion having a. 2. The independent leaf spring suspension system of claim 1, wherein the second leaf spring assembly has a front eye fixed to the bracket with a sackle pin, and the rear eye connected to the bracket via a circle link.