DE1238347B - Longitudinal semi-elliptic leaf spring for motor vehicles or trailers - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B62d

B60g

German class: 63 c-40

Number: 1 238 347

File number: C 29362 H / 63 c

Filing date: March 12, 1963

Opened on: April 6, 1967

The invention relates to a longitudinal semi-elliptic leaf spring for motor vehicles or trailers with a leaf spring end hinged to the vehicle frame, the other leaf spring end through the end of a shorter one extending along the main leaf spring towards its center and on the vehicle frame articulated auxiliary leaf spring is progressively supported.

Vehicle springs are known which have a main spring and an auxiliary spring to a progressive one To create degree of suspension, whereby the auxiliary spring is firmly connected to the vehicle and itself extends over one end thereof in the same direction as the main spring while the other The end of the main spring alone is pivotally attached to the vehicle by a bracket. These well-known feathers, which are satisfactory in operation but are generally costly to manufacture, since each spring has to be adapted to individual requirements and consequently limits the application is.

Half-elliptic vehicle springs are also known, which are located with the help of auxiliary springs and a knee joint Support on the vehicle frame, with an auxiliary spring arranged on the vehicle frame so that it can move longitudinally is. This known spring arrangement is also complicated and expensive to manufacture.

The invention is therefore directed to a progressive vehicle spring that bounces well but with little Means is to be established.

Accordingly, the invention consists in longitudinal semi-elliptic leaf springs of the type described above in that the auxiliary spring containing a leaf spring package on the vehicle frame with the help of a pivotable Bracket is hinged, which in turn is pivotable and longitudinally displaceable connected to the main spring is.

The drawings show an example of the design of a semi-elliptic leaf spring according to the invention, namely shows

Fig. 1 is a side view of a spring according to the invention,

FIG. 2 is a perspective view of the spring according to FIG. 1, in which the fastening flange is not was shown to better show the remaining parts, and

3a, 3b, 3c schematically the mode of operation of the spring.

As can be seen from the drawings and in particular from FIGS. 1 and 2, the spring for motor vehicles has a main spring 11 which is attached to the front (not shown in the drawing-longitudinal semi-elliptic leaf spring for
Motor vehicles or trailers

Applicant:

William E. Cary Ltd.,
Manchester (Great Britain)

Representative:

Dipl.-Ing. K. Ranfft and Dipl.-Ing. S. Sauer,
Patent attorneys, Munich-Solln, Sulenstr. 8th

Named as inventor:

Alan Brooke Sykes,

Cheadle, Stockport (UK)

Claimed priority:

Great Britain March 13, 1962 (9702)

set) end is attached to the chassis 12; also a spring clip 13, which is pivotally attached to the chassis 12 with the help of a bolt 14 and connected at the rear end to the rear end of the Hauptfederll by a screw bolt 15, which is through holes in the side webs 13 a, 13 b of the spring clip and by an elongated Augella der Federll engages, as well as an auxiliary spring 16, which is located on the spring clip.

The auxiliary spring 16 consists of a spring assembly 16 a, which is firmly connected to a block 16 b , which is attached to the spring clip 13. The spring assembly 16 a is connected to the block 16 δ by means of a bolt 16 c.

The mode of operation of the spring is shown in FIG. 3 a to 3 c and is as follows:

In the unloaded state (see Fig. 3a) the Hauptfederll and the spring assembly 16 a touch. If, however, the main spring 11 flattens out with increasing load (see FIG. 3b), it moves the contact zone of the main spring 11 and the spring assembly 16a gradually to the opposite or fixed end of the main spring, and so there is a progressive suspension according to the change in length the effective spring. When fully loaded, the spring assembly 16 a is not effective as a spring, as can be seen from Fig. 3c, but it only forms a support for the rear end of the Spring 11.

709 548/219

Claims (3)

In practice, a main spring slightly larger than the usual length is usually used and it is arranged so that the length of the effective spring approaches the normal length when fully loaded. It has been found that the present invention provides a less expensive suspension than has heretofore been possible because the spring can be made primarily from parts that are kept in stock and little or no modification to the spring suspension that can be made located on the vehicle. Claims: 15 1. Longitudinal semi-elliptic leaf spring for motor vehicles or trailers with a leaf spring end hinged to the vehicle frame, the other leaf spring end being progressively supported by the end of a shorter auxiliary leaf spring which extends along the main leaf spring towards its center and is hinged to the vehicle frame, characterized in that that the auxiliary spring (16) containing the leaf spring package (16 a) is articulated on the vehicle frame ( 12) with the aid of a pivotable bracket (13) which is in turn connected to the main spring (11) in a pivotable and longitudinally displaceable manner. 2. Leaf spring according to claim 1, characterized in that the bracket (13) with the main spring (11) is rotatably connected by a bolt (15 ) which protrudes through an elongated eye (IIa) of the main spring (11). 3. Spring according to claim 1 and 2, characterized in that the bracket (13) has approximately U- shape, and that the auxiliary spring (16) essentially forming the leaf spring assembly (16 a) with the aid of a block (16 b) with the Bracket (13) is connected. Considered publications:
U.S. Patent No. 1,858,930. 1 sheet of drawings 709 548/219 3.67 © Bundesdruckerei Berlin