JPS58501626A - Suspension system for motor vehicles using elastic blades - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Suspension device for a motor vehicle using elastic blades This invention relates to a suspension system for a motor vehicle using elastic blades. However, an elastic leaf spring is provided which carries the support of the wheel at its free end. This invention relates to a suspension system for an automobile.

The reduction in vehicle wear and tear is a function of the reduction in its dead weight; therefore, the improvement Along with the development of engines with high output, improvements were made to the engine, car body, and suspension system. Research is simultaneously directed towards reducing the weight of the components. Conventional technology Matsuta 7A -son-type front suspension systems rely on suspension springs fixed to one component of the vehicle body. It consists of a connected damper and a triangle for transmitting traction force to the chassis. Ru. These suspension systems also have a horizontal bar that resists minute vibrations of the wheels in relation to the vehicle body. It is provided. This horizontal bar is a roll prevention bar, a horizontal position holding bar, or a stabilizing bar. It is called variously. In this case) the triangle is replaced by a strut may be done. In the rear suspension, the springs carry the wheel arms It is often replaced with a torsion rod. Manufacturers manufacture suspension system components of We have sought to replace or eliminate it. That is why the first French painting patent. No. 079,423, the strut or triangle is connected to the chassis and the stub axis pivot. This leaf spring has a triangular flexible plate shape that is fixed between the rotating part of the The chassis is supported by a region with a predetermined curvature that gives it elasticity.

This modification is not intended to reduce the weight of the suspension system, but rather reduces the burden on the guiding parts. This results in a reduction in lateral forces and a reduction in the number of required joints.

French Painting Patent No. 1.597,358 eliminates the spring type damper and replaces it with a longer body. Using transverse leaf springs fixed to the car body at two points symmetrical about the hand axis We are proposing a solution based on The end of each spring supports each wheel and The lamp connects the wheel support to the vehicle body.

This configuration reduces the number of required joints between the wheel support and the vehicle body and In addition, the space occupied by the coiled suspension spring can be reduced. The purpose is

The purpose of the suspension system, which is the subject of this invention, is mainly to Eliminate triangles and supports and reduce the weight of at least the horizontal position holding rod. This results in a reduction in weight. These different components are An elastic leaf spring made of material that is placed above the chassis in its vertically symmetrical plane. said plate having an increasing height from its fixation point to the supporting end of the wheel; It has been replaced with a spring.

One embodiment of the invention can be understood from the description and drawings set forth below by way of example. It should be possible to understand.

FIG. 1 shows a sectional view of one side of a conventional front axle of a vehicle.

Figure 2 shows one side of the rear axle of a conventional vehicle. Figures 3 and 4 show this model. 1 shows one embodiment of an elastic leaf spring according to the invention.

FIG. 5 is a sectional view of one side of the front shaft provided with the leaf spring according to the invention.

FIG. 6 is a cross-sectional view of the connection of the leaf spring to the pivot.

FIG. 7 is a sectional view of the connection portion of the leaf spring to the vehicle body.

A MacPherson type front suspension 1 (FIG. 1) includes a swiveling damper component 2. nothing. °A coil suspension spring 5 is installed between the end 3 of the damper body and the end 4 of the rod. Fixed. The end 4 of this rod is fixed to a reinforced part of the body 6. swivel type The other end 7 of the damper body is fixed to the hub support 8 of the wheel and at its end It carries a swivel 9, which swivel cooperates with the top of the triangle or with the shaft. It cooperates with the end of the column 10 fixed to the sea 11.

One end of the coil spring 5 is fixed to a triangle or support 10, and the other end is fixed to a triangle or pillar 10. It may be replaced by a torsion rod fixed to the chassis 11.

The left and right triangles or pillars 10 may be connected by a stabilizing support 12. .

The rear suspension system (Fig. 2) is independent for each wheel, and each wheel has one damper. 4 to the main body, and a rotational movement can be achieved, for example, by a torsion bale 16. It is supported by an arm 13 connected to the chassis by a controlled joint 15. Ru. In certain embodiments, this rod may for example be a rod for a front suspension. It has been replaced with an il spring. A stabilizing rod may also be connected to each of the left and right components.

Each component of the suspension system has a well-defined function as outlined below.

Coil springs or torsion springs ensure that the vehicle returns to a static equilibrium position in the vertical direction. It is. Its layered nature controls deflection under load.

The struts or triangles transmit traction or braking forces from the wheels to the chassis; Ensuring the geometric positioning of specific points within the suspension system, e.g. the front wheel pivot .

Accurate guidance of the wheels and transmission of traction are achieved by means of triangles or supports. 2 on the chassis provided by the combination of columns and horizontal positioning rods. One installation requires location.

The Yasuhiro bar is used to control the tilt of the vehicle, for example when turning a corner on a flat road. limit This keyaki provides rolling resistance of the vehicle in relation to each spring, but it Interference is caused by the symmetrical deviation of the left and right wheels from the chassis, known as Ping. do not.

The suspension system according to the present invention supports wheels in a vertically symmetrical plane. It has a wall thickness that increases towards one or both ends, and is attached in a horizontal plane. It consists of an elastic leaf spring made of composite material with wide sections.

Depending on the characteristics of the leaf spring, suspension springs or torsion springs may be triangular or support springs. It can become useless along with the pillar. In some cases, the stabilizing rod may become unnecessary. Or it can be made lighter.

3 and 4 show one embodiment of the leaf spring 17 according to the present invention, It is more particularly intended to be integrated into the front shaft.

When viewed from directly above (3rd WJ), this leaf spring has two walls that become thicker toward the end. Rectangular, thin-walled (FIG. 4) central section 18 terminating in trapezoidal sections 19 and 20 have. According to the properties required for leaf springs, the central portion 18 is relatively long. It is in this band that there is maximum flexibility. To the leaf spring When no stress or load is exerted, it is curved in the vertical plane .

The leaf spring may also have only one trapezoidal end; The details will be explained later.

FIG. 5 shows one of the front shafts provided with a transverse leaf spring 17.

This leaf spring has two mounting positions equidistant from the longitudinal axis of the vehicle (these (only one of the positions 22 is shown) is fixed to the chassis 21. ing.

Both ends of the leaf spring support each wheel via the pivot 26 of the stub shaft. Sha The attachment of the leaf spring to the sea and the rotating portion will be described later.

In this type of suspension, the horizontal leaf springs supporting the two wheels are has an overall leveling effect, whereby traditional stabilizing bars can be made lighter or even non-existent. Useful.

Depending on the alternative type of front or rear suspension, the horizontal or vertical leaf springs have trapezoidal ends. It has only one section and supports a single wheel. In this case, horizontal There is no holding effect and a stabilizing rod must be provided.

When using elastic leaf springs in the rear suspension, the arms and spring components (fill springs or Jiri Ritsu) can be removed.

A suspension system with a transverse leaf spring supporting a single wheel has a single trapezoidal end. Consisting of several leaf springs, their smallest wall thickness is at the lower side of the overall width of the chassis. are placed next to each other.

A suspension system with longitudinal leaf springs consists of a leaf spring with a single trapezoidal end. , their total length is a function of the required elasticity, among other factors.

According to the embodiment shown in FIG. 6, between the wheel support and the suspension leaf spring! ! Continued The section includes a metal tubular insert fixed within the thick walled end of the suspension leaf spring 25. 24 is included. This insert has a stub shaft on its inside surface. It has a collar 26 forming a seat for the bulbous end 27 of the pivot 28. spherical end 27 is pressed onto the seat by a spherical cup 29 carried by a compression spring 30. It is kept as it is. The collar 26 corresponds to the diameter of the spherical part 27 of the stub shaft bipot F. Relatedly, the spherical portion is constructed in such a manner that its center 0 lies on the neutral axis of the elastic leaf spring. It is. The stub shaft and pot are fixed to the stub shaft 61 of the wheel and are It is also fixed to one end of the damper leg 32 by means. The sealing bellows 33 is a damper leg! 2 and the end of the IF-shaped insert 24 to prevent dust from entering the joint. prevent entry.

The connection between the wheel support and the suspension leaf spring is made in the customary manner by means of a swivel. and in the case of front suspension, by a pivot as described above, or by a rear suspension. In some cases, it is composed of link members. Connection of either the swivel or the adapter member The center of the position of the part is fixed in the plane of the leaf spring and prevents any twisting of it. It is designed to stop.

According to another type of connection, not shown, the end of the leaf spring is fitted with an internal bore. It is inserted and fixed into the housing of the metal member, and this inner hole has a stub shaft bill. The bulbous end of the cut enters in that region, for example in the embodiment described above. is maintained by similar means.

FIG. 7 shows an example of a flexible attachment between the chassis and the suspension spring. In this illustration Although the leaf spring is horizontal in shape, a similar attachment part is used for longitudinal leaf springs. It's okay to be rejected.

The leaf spring 34 is inserted into a casing 65, in which the leaf spring is for example connected. It is held by adhesive, bottle fixation, or some other known means. of the casing The upper wall 66 supports a block of elastomer 67 and is fixed to this block. A plate 38 is fixed, for example by vulcanization.

The fixing plate is attached to the chassis member 39, for example.

Elastomer 37 pull lids have a longer ability to withstand release in the lateral direction of the vehicle. It has different abilities than those in the direction. The removal of it increases traction and braking power. It is small in the longitudinal direction and in the vertical plane for transmission. in the lateral direction to accommodate changes in the length of the leaf spring resulting from dislodgement. Hey.

Other commercially available materials for providing attachment points between chassis and leaf springs. Any system may be used. Therefore, when manufacturing leaf springs, the chassis or an opening capable of receiving a resilient contact member fixed directly or indirectly to the shell member; May be provided.

According to a new embodiment of the suspension system, - If the leaf spring is horizontal and supports two wheels, is a knee plate that is symmetrically located with respect to the axis of the vehicle and has two flexible attachment parts. If the spring is horizontal and supports a single wheel, the above embodiments Two flexible attachments are provided to the chassis such that; - if the leaf spring is horizontal or longitudinal and supports a single wheel; , one flexible attachment and one rigid attachment; these attachments are Either can be provided on the side near the supported wheel.

By using the suspension leaf spring according to the present invention, the weight of the suspension system can be significantly reduced. It is possible. The overall gain for front and rear suspension is: of conventional suspension systems with suspension springs, triangles or struts, and stabilizing bars. It is approximately 1/3 of the weight.

Suspension leaf springs are made of a longitudinal laminate of glass fiber and epoxy resin. Cut out the leaf spring by keeping it constant from one end to the other, or preferably It can be made by molding if the method is followed, i.e. the fiber is one end of the leaf spring. It remains constant over the entire length of the rod without being cut from one end to the other end.

The latter configuration makes it possible to produce leaf springs with extremely high resistance to fatigue. Ru.

The glass fibers of the above examples may be bonded with other inorganic, organic, natural or or synthetic fibers.

l of amendment! l Station statement submission form (Article 184-7, Paragraph 1 of the Patent Act) July 18, 1982 Day Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1. Display of patent application PCT/FR81100150 2. Name of the invention Suspension device for motor vehicles with elastic blades 3, patent applicant Address: France, 78370, Plessir, Pwartaubostal, Number 3 Name: Hertan Ehunpani Representative: Morcière Rainier, France 4. Deputy manager Address: 1-6-14 Nishi-Shinbashi, Minato-ku, Tokyo April 23, 1983 6. List of attached documents Claims after amendment 1. It has one elastic leaf spring made of composite material, and this leaf spring is attached to the vehicle chassis. - fixed to the wheel support and damper at its free end; A front or rear suspension system for a motor vehicle supporting the leaf spring (17), wherein the leaf spring (17) in the plane of its vertical symmetry and at least a portion of its length 1 m part supporting the wheel support (26) or both ends! (19,20 ), the suspension device having a wall thickness increasing towards .

2. The suspension device according to claim 1, wherein the leaf spring is toward one end or both ends supporting the wheel support in a symmetrical plane of direction. At least one part of the wall has a wall thickness that increases as the length of the wall increases. The above-mentioned suspension device has a fixed portion.

3. A suspension device according to any one of claims 1 to 2, The suspension device as described above, wherein the cross-sectional area of the leaf spring is constant from one end to the other.

4. A suspension device according to any one of claims 1 to 3, The leaf spring has an appropriate tI! without being cut from one end to the other. Inside the solid medicine The suspension device comprises interwoven longitudinally extending fibers.

5. The suspension device according to any one of the above claims, wherein the elastic plate The screw (17) is located transversely to the longitudinal axis of the vehicle, and to the chassis by two flexible attachment parts (22) symmetrical about the axis. The suspension device is fixed.

6. A suspension device according to any one of claims 1 to 4, This suspension system includes a two leaf springs, each supporting one wheel at its free end; The above suspension device is incorporated.

F. The suspension device according to claim 6, wherein a plurality of the leaf springs and the chassis, wherein a flexible mounting portion is provided between the suspension device and the chassis.

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Claims (1)

[Claims] 1. It has one elastic leaf spring, and this leaf spring is fixed to the chassis of the vehicle. A suspension system for a motor vehicle supporting a wheel support and a damper at the free end of the suspension system, , the leaf spring (17) is made of composite material, and in the zone between each attachment part. The above suspension device, with its maximum flexibility. 2. The suspension device according to claim 1, wherein the leaf spring is said wheel in a plane of directional symmetry and over at least a portion of its length; having a thickness increasing towards one or both ends supporting the support (26); , the above suspension device. 3. The suspension system according to claim 2, wherein the leaf spring is attached to the wheel support. The at least one wall thickness increasing toward the one or both ends supporting the support body. The suspension device has a certain wall thickness with an extension by one section. . 4. The suspension device according to claim 1, wherein the leaf spring has a cross section of The suspension is constant from one end to the other. 5. The suspension device according to claim H, item 1 or 2, The leaf spring extends in the longitudinal direction from one end to the other without being cut, and is properly bonded. The above nest suspension device consists of fibers embedded in an agent. 6. The suspension device according to any one of the above claims, wherein the elastic plate The screw (17) is located transversely to the longitudinal axis of the vehicle, and to the chassis by two flexible attachment parts (22) symmetrical about the axis. The suspension device 0 is fixed. 7. A suspension device according to any one of claims 1 to 5, This suspension system includes a suspension system that is located laterally in parallel with the longitudinal axis of the vehicle. two leaf springs, each supporting one wheel at its free end; The above suspension system is incorporated. 8. The suspension device according to any one of the above claims, wherein one of the plates at least one flexible attachment between the spring or two leaf springs and the chassis; The above-mentioned suspension device is provided with.