DE1780447B1 - Hydraulic steering shock absorber with a piston rod protruding from the cylinder chamber on one side - Google Patents

Description

iHAL UNiSPECTED

3 4

can be adjusted. In the piston rod 2, the liquid is displaced from the chamber 5,

In addition, a longitudinal bore 18 is provided, which is part of the overflow openings 41,

a plug 19 is closed and the chamber 39 and bores 42 are pumped into the chamber 4,

mern4 and 5 via narrow bores 20 and 21 with the rest (the one facing the penetrating piston rod

connects each other. 5 corresponds to volume) escapes through opening 45

The bores 20 and 21 can through the adjusting into the equalizing tank 35. This practically takes place nuts 16 and 17 thereby completely or partially - no damping (FIG. 3, line a). be locked that the adjusting nuts are rotated as soon as the opening 45 and the Überströmöffnun screw thread 22 and 22 '. After 41 and 43 are covered by the piston, piston 3 can be brought into an end position is rotated in the piston towards piston rod 2, with the actuation of the damper valve 12 flowing out of the chamber 5 into cams 23 and 24 arranged in nuts into the chamber 4. The recesses 25 and 26 to be displaced from the chamber 5 at both cylinder ends, at least the penetrating piston grip. 15 rod volume corresponding amount of liquid

At the upper end of the cylinder 1,1 'is located escapes through the valve housing 27 via the drilling

a valve housing 27, which wrestled with a throttle 28 33 of the check valve 29 and over the

acting resilient and a central hole 32 of the throttle 28 as a check valve, which is deformed in the process

29 acting rigid plate is provided, both being the passage 34 and in the compensating plates from a light spring 31 on a seat 20 container 35.

30 are held. The throttle 28 has a central The flow both through the piston 3 as well les hole 32, while in the check valve through the valve housing 27 experiences resistance, so 29 bores 33 are provided, which on the ge that a damping force arises (Fig. 3, line έ). Closed Part of the throttle 28 limit. The valve - soon then the piston, the opening 45 and the outer housing 27 connects the chamber 5 via a 25 flow openings 41 and 43 releases the liquid passage 34 with one around the cylinder 1, Γ passes back out of the chamber 5 through the bores lowing expansion tank 35. 44, chamber 40 and overflow openings 43 in the

A chamber 4 flows on the rod side of the cylinder 1, 1 '; the extra fluid that in the direction of the chamber 4, the non-return valve opens to the penetrating piston rod volume 36 speaks for the inflow of liquid from the 30, can through the opening 45 into the expansion tank 35 arranged in the chamber 4. container 35 escape. This creates practical

The space between the walls of the cylinder 1, no damping (Fig. 3, line c). 1 'is made of elastic at the ends of filling rings 37. During the entire insertion stroke of the piston 3

Shem material is limited and a liquid requirement in the chamber 4 can also exceed made of elastic. Material made ring 38 in two 35 the check valve 36 from the expansion tank Chambers 39 and 40 divided. The chamber 39 is available for 35 additions.

in or approximately in the middle of the cylinder 1 by over- At the start of the extension stroke of the damper can

Flow openings 41 and at the end of the cylinder through the liquid to be displaced from the chamber 4 Bores 42 in connection with this. For the through the overflow openings 43, chamber 40 and Chamber 40 create overflow openings or drill holes 44 into chamber 5 and through the openings 43 and 44 this connection. At the height of the openings 45 in the expansion tank 35 escape. Overflow openings 41 and 43 are one or more - there is practically no damping (Fig. 3, rere openings 45 are provided, which are a direct line c).

connection between the chambers 4 and 5 and the After the piston 3, the openings 45, 43 and

Form expansion tank 35, if it is not covered by the 45 41, the liquid can only through Pistons are covered. the bores 20,18,21 in the piston rod and 11

Around the pipe 1 'there is where the openings 45 in the piston open into the expansion tank 35 after the damping valve 10 has been raised, a band 46 flows out of the chamber 4 into the chamber 5. This elastic material is placed, which is intended to flow through causing a damping force (Fig. 3, to exclude air when filling the damper. 50 line e). After the piston 3 has released the openings along this band, the liquid from the 45, 43 and 41 can flow again from the chamber 4 or 5 through the bores 42 into the expansion tank 35 without any significant resistance. The chambers chamber 39 and bores 41 in the chamber 5 39 and 40 flow with individual vent openings. There is practically no damping 47 and 48, which are dimensioned such that 55 (FIG. 3, line f).

they have practically no effect on the damping forces during the entire extension stroke of the piston 3

to have. the fluid requirement (of the exiting

The expansion tank 35 can have a piston rod volume corresponding to a dome) in the chamber 5 be increased, in which the air is collected via the check valve 29 and the throttle 28 from mine can, and which complements the expansion tank 35 through an opening 50 with the 60. Expansion tank is connected. The damping can be achieved by adjusting nuts 16 and

The damper according to the invention acts as follows - 17 can be regulated in such a way that when it comes to dimensions and dimensions: At the beginning of the push-in stroke of the damper push stroke, the same damping forces occur.

1 sheet of drawings

COPY

Claims (3)

should. This results in the damper character- patent claims: stik that such a shock absorber should only exert a damping force in its central position. 1. Hydraulic steering shock absorber with a steering shock absorber where the desired 5 curve of the damping force caused by the training Piston rod, its piston in the middle and assignment of the overflow openings and flow the greatest damping force is experienced and achieved in the manner of medium throttling, it is proposed of a slide overflow openings in the Zy- This arrangement can, however, with a steering shock luffing wall controls and both sides of the damper with one-sided piston rod is not used Piston lying chambers above flow 10, since it has the necessary compensating device throttles are connected, in which of the lines are missing. Both ends of the chamber by a ring against- The invention is based on the object of a to create separate channels to the overflow opening hydraulic steering shock absorber, which the voltages lead to the achievement of the desired damper character range in the mean displacement the piston is closed by this 15 stik with a one-sided piston rod necessary outside, wherein the fluid contains restrictors between equalizing devices. the chambers are formed in the piston so that this object is achieved according to the invention characterized in that both Kam- solves that both chambers are connected via an inflow without mern (4, 5) via an inflow without damping damping-permitting check valves with a permitting check valve (29 or 36) with ₂ o expansion tank that the from which are connected to a compensating tank (35), the piston rod facing chamber is connected to the equalization chamber via a container which is attenuating in the outlet direction via a throttle that damps the discharge direction from the piston rod (2) and that, for example, in the transverse throttle (28 ) level with the expansion tank (35), in which the one in the middle of the piston is bound by it and that approximately in the transverse plane in which there are 25 closed overflow openings, one which is arranged in the cylinder wall in the middle of the piston through this opening, the closed overflow openings (41, 43) are connected to the expansion tank and another opening (45) in the The cylinder wall is also arranged by the piston as by a slide that is controlled by the expansion tank. (35) is in connection and also from KoI 30 According to a further embodiment of the invention ben (3) as controlled by a slider. the further opening opens through which the channels 2. Steering shock absorber according to claim 1, characterized in that the separating ring in a between, that the further opening (45) a pipe and a further pipe existing through the space separating the channels from each other, which in a known manner the Aus-ring (38 ) in an equal container between a pipe (1 ') and _{35 forms.} another pipe (6) existing space mün- The advantages achieved by the invention exist det, which in a manner known per se means, in particular, that a hydraulic steering shock equal container forms. Damper created with a piston rod on one side 3. Steering shock absorber according to claim 2, characterized in that practically only in its central position a characterized in that the further opening (45) _{exerts damping in 40} , while in movements outside of itself known manner through a pipe (1 ') half of the central position none Damping takes place, surrounding band (46) made of elastic material. An exemplary embodiment of the invention is shown in the drawing that is closed to form a check valve and is described in more detail below. described. It shows 45 Fig. 1 is a longitudinal section of a with a fluid fluid acting damper, F i g. 2 shows the longitudinal section along the line II-II from F i g. 1 and F i g. 3 a diagram of the damping forces. The invention relates to a hydraulic steering system. The diagram according to FIG. 3 represents at different shock absorbers with piston positions of the damper according to FIG. 1 coming out of the cylinder space on one side Executed piston rod, the piston of which in FIG. 2 and FIG. 2 represent the damping forces. In F i g. 1 is a double middle position experiences the greatest damping force and after walled cylinder 1, Γ, in which a piston type a slide overflow openings in the cylinder 2 arranged piston 3 is movable, which the linderwand controls and its two sides of the KoI 55 cylinder divided into two chambers 4 and 5, in bens lying chambers housed on a fluid flow tube 6, which is attached to the be connected, at which ends facing away from both piston rods by a Bo chamber ends closed by a ring against each other 7 and at the other end with a separate channels lead to the overflow openings, guide 8 and a stuffing box 9 for the passage in the middle displacement range of the piston 60 guide the piston rod 2 is provided. are closed by this, wherein the flow- The piston 3 points away from a damping valve 10- medium throttles between the chambers in the piston closed bores for overflow of are trained. Liquid from chamber 4 to chamber 5 as well These special shock absorbers serve to reduce the Bohrun vibrations, which are closed off by a damping valve 12, when driving straight ahead on the steering 65 gene 13 to overflow of liquid from the wheel of a motor vehicle are transferred to chamber 5 to chamber 4. The two fumes while the movements of the steering wheel valves 10 and 12 are under the pressure of Febei Cornering positions are not dampened by the 14 and 15, which are set by adjusting nuts 16 and 17