DE2157857A1 - Hydraulic telescopic shock absorber, in particular for independent wheel suspensions - Google Patents

Description

L.I.M.S. (Lavoräzioni Industriali

Meccaniche del Savena) Societä Rastignano / Italy

in Accomandita Semplice s.a.a /

Hydraulic telescopic shock absorber, especially for independent wheel suspensions.

The present invention relates to a hydraulic telescopic Shock absorbers, especially for independent wheel suspensions (type Mc-Phersspn). With the independent suspension As is known, replaceable shock absorbers are used, which are arranged in an outer housing and firmly attached the wheel hub are attached.

The conventional shock absorbers of this type consist of a cylinder with a piston movable therein, which is fastened to the piston rod and immersed in oil _e These shock absorbers are designed to be very stable, as is since the shock absorber housing fixed to the wheel and thus a load-bearing part of the suspension * the shock absorbers have to withstand high loads »

209823/1027

These shock absorbers are very expensive to manufacture because precision work is required. the Proper alignment and centering of the cylinder and piston depend solely on the piston and piston rod.

Therefore, it is not only particularly accurate processing required, but the piston rod diameter must also be selected to be particularly large. This results in a reduction in the volume of oil and an unfavorable design the compensation chamber. You could increase the cylinder diameter, but this would result in a wider one Weight increase for the shock absorber and its assembly would be made more difficult «

The aim of the present invention is to provide a much more economical shock absorber as the embodiments described above in which no high-precision machining longer required ₀

In addition, a shock absorber is to be created which, while maintaining the same dimensions, is a larger one Can absorb oil volume and is therefore characterized by a greater efficiency.

These and other objects of the invention will become realized by the shock absorber according to the invention, which is characterized in that it consists of a first inner movable cylinder housing to accommodate the Shock absorber body as well as a second, solid and. consists coaxially to the first arranged outer housing, wherein are arranged between the same spacer and guide means, which the first inner housing the function " lend a guide rod for the shock absorber.

Further characteristics of the shock absorber according to the invention

209823/1027

damper are described in more detail and with Explained with reference to the accompanying drawing of a preferred embodiment of the subject matter of the invention. The one pictured The shock absorber is shown in longitudinal section.

With reference to this figure, (1) is an. a piston rod (2) designated piston supported, the is attached to the piston rod in a known manner. Piston rod and piston are in a first inner, movable cylinder housing (3) arranged, which in turn is built into a second fixed outer housing (4), which is arranged coaxially to the inner housing (3) " A cylinder (5) is installed at the bottom between the housing (3) and the housing (4). This preferably consists of "Synthetic resin and is attached to the outside of the housing (3) with a circumferential rib (6).

With (7) a second, preferably made of synthetic resin cylinder is designated, the top between the two Housings (3) and (4) is arranged. This second cylinder (7) is worked into the housing (4) between a cylinder Rib (8) and an edge (9) attached in turn to the housing (4).

With (10) one is attached to the housing (3) Ring called that limits the stroke of the housing (3) and comes to a stop on the rib (8).

The two cylinders (5) and (7) therefore serve ZiM centering and guiding the two housings (3) and (4), and the movable housing (3) also serves as a guide

-rungs rod for the suspension. With (11) is a sealing ring referred to, which is attached to the movable housing (3) with known provisions. From the central hole (12) The piston rod (2) "protrudes from the ring (11)

20982.3 / 1027

the lower end (13) of which two threaded rings (14) and (15) are pulled up are, between which two rings made of elastic material are arranged.

These rings (16) form an annular groove (17) which is pressed into the central bore of a ring (18), which is provided with an edge which is crimped onto the end portion of the housing (4).

Attach the KbIben rod attachment described above the housing (4) allows this piston rod to be moved radially to avoid any centering errors in the piston rod axis and to eliminate the axis of the outer housing (4).

With (19) a membrane with a central bore (20) is designated, through which the oil flow during "the Work phase of the shock absorber takes place.

The shock absorber created in this way is installed in a housing (21) which is attached to the wheel hub at the bottom attached and attached to the housing with an inner ring (22). The housing (3) is at its top of a disc (23) completed, to which the pin (24) is rigidly attached. This pin is used for attachment the shock absorber to the chassis.

For the subject matter of the invention described above Numerous variants are possible without thereby exceeding the scope of the invention by adding certain technical Precautions are replaced by equivalent solutions.

209823/1027

Claims (6)

Patent claims • 1. Hydraulic telescopic shock absorber, especially for Independent wheel suspensions, characterized in that it consists of a first inner movable cylinder housing (3) to accommodate the shock absorber body, from a second, fixed and coaxial to the first arranged outer housing (4) with spacers and guide means (5), (10), (7) arranged between them, which support the first inner housing (3) the function of a guide rod for the shock absorber lend, and finally from a housing (21). 2. Shock absorber according to claim 1, characterized in that it consists of a first guide cylinder (5), which is arranged between the inner movable housing and the outer fixed housing and fixed to the inner movable housing is connected. 3β shock absorber according to claim 1, characterized in that that a second guide cylinder (7) between the inner movable housing and the outer fixed housing is provided, which is fixed to the outer fixed Housing is connected. 4. Shock absorber according to the above claims, characterized in that that the first and second cylinders (5) and (7) are made of synthetic resin, 5. Shock absorber according to the above claims, characterized in that that it consists of a ring (10) attached to the inner movable housing, which controls the stroke the outer movable housing is limited. 6. Shock absorber according to the above claims, characterized in that that the shock absorber rod is attached to the fixed outer housing with an elastic anchor (17). 209823 / TÖ.2T is stigt, this anchoring a radial displacement of the rod relative to the outer fixed housing enables. 209823 / Ϊ027