DE1206686B - Valve unit for reversible hydraulic motors - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN S / WIW> PATENTAMT Int. U .:

EDITORIAL

German class: 47 g-29

Number: 1206 686 ^;

"File number: H 46477 XU / 47 g"

Filing date: July 27, 1962

Opening day: December 9, 1965

Dip invention relates to a valve unit for reversible hydraulic motors, consisting of a Group of individual housing sections with mating surfaces lying on top of one another and with one through all Sections of continuous feed line and with at least one lying between end sections Housing part with a control slide for connecting the feed line to a working line connected is.

With the previously known, assembled from building blocks Valve units for reversible hydraulic motors, it is common to use the load-holding To accommodate check valves in plugs that are accessible from the outside and sealed to the outside Need to become. The invention greatly reduces the risk of leaks, in addition, the overall structure is much more compact. This is achieved according to the invention in that in the feed line between the feed line and the control slide a bore for receiving a load-holding check valve is arranged, which opens into the mating surface, wherein the check valve is kept closed by the adjacent housing section.

With such a design there is, according to a further feature of the invention, the possibility of the inflow end of the bore for receiving the check valve with an adjacent one To connect the feed line through a milled cut in the mating surface.

The invention is in the following detailed description of preferred embodiments illustrated with reference to the drawings, for example. In the drawings shows

Valve unit for reversible hydraulic.
Engines

Applicant:

Hydraulic Unit Specialties, Company,

Waukesha, Wis. (V. St. A.)

Representative:

Dipl.-Ing. H. W. Schöning, patent attorney,

Hamburg 1, Mönckebergstr. 31

Named as inventor:

Francis Henry Tennis, Milwaukee, Wis.

(V. St. A.)

Claimed priority:

V. St. v. America May 9, 1962 (192 220) - -

F i g. 8 is a front view of one of the parallel circuit individual valves according to section line 8-8 of FIG. 7th and

9 is a front view of one of the series parallel circuit single valves according to section line 9-9 "of FIG. 7.

The valve assembly 5 shown in the drawings, clamped together with screw bolts 9, contains Between two housing end sections 7 and 8 individual valves 6 are located on the upper end section 7

Fig. 1 is a side view of a valve assembly 35, the inlet 10 and the outlet 11. The lower with two individual valves or control sections in end section 8 is used to collect the return flow according to the invention Training, the pressure medium upstream of the return line to the outlet

Fig. 2 shows a cross section through an individual valve 11. The individual valves 6 feed via two working methods the section line 2-2 of Fig. 1, ducts 3, 14 and the connections 15 reversible F i g. 3 shows a section along section line 3-3 40 hydraulic cylinders or motors. Serves for control of Fig. 1, the piston valve 17 in the bore 16, which in

F i g. 4 shows a section according to section line 4-4 of FIG. 3,

F i g. 5 is a perspective view of two adjacent individual valves in the separated state, 45 to connect the other to the outlet 11.

Fig. 6 is a sectional partial view according to the In the neutral position, the pressure medium flows from

Section line 6-6 of FIG. 4,

FIG. 7 shows a section similar to FIG. 4 for
Explanation of how a plurality of parallel circuit individual valves arbitrarily with a plurality of 50 central duct 19 is formed in each individual valve 6 Y-shaped series parallel circuit individual valves are stacked and consists of fork arms 28 that can only be used without interfering with the function of the individual valves , in the neutral position of the spool valve 17 with

509 757 / 219-

can be shifted in both directions from the neutral center position according to FIG. 2 to each one of the working channels 13, 14 with the inlet and

Inlet 10 via the central channel 19, which is open in all individual valves 6, through the lower housing section 8 and a return line 20 to the outlet 11. The

Claims (2)

1 206 6B6 3 4 a middle section29 are in communication. In the embodiment of FIGS. 1 to 6 min-The Central channel serves as a feed line for all in the branches 37 of the bore 35 in the feed series connection working single valves 6th line 21. The valve unit also contains one with allele operation possible. For serial parallel operation Inlet 10 connected feed line 21, which the 5 it is only necessary, the branch 37 of the drilling Valve unit crossed and on the lower housing 35- of the individual valve with one of the adjacent sections ends dead. The line'21 feeds all in bearded arms 28 of the central channel 19 to connect. Individual valves working in parallel 6.. How easy this change from parallel operation Each individual valve 6 contains a U-shaped can be used for serial parallel operation Return channel 23 with a central part 25 and side io can be seen in FIGS. 7, 8 and 9. Fi g. 7 shows poor 26 and 27 and a U-shaped feed channel from top to bottom a series parallel circuit valve 24 with a middle part 33 and side arms 31 and 50, a parallel circuit valve 52, a second in-line 32. The arms 26, 27 and 31, 32 of the U-shaped parallel circuit valve 51 and a second parallel circuit channels 23 and 24 are outside and inside next to valve 53. The branches 37 are in each individual Working channels 13 and 14 and are with the valve 15 on the outside and consist of one there Bore, 16 connected. The return line 20 milled groove. In the two parallel circuit valves connecting all central parts 25 of the return ducts 23 of 52 and 53, branch 37 leads to feed line 21. Single valves. The feed channels 24 of the individual valves 6 In the two series-parallel circuit valves, the leads are connected to the feed line 21 via a branch 38, branch 37 to the inflow ends 28 of the a bore 35 which, in its lower section 39, has 20 central channel 19. a load-holding check valve 36 for the working die as grooves on the top of the individual valves channels 13, 14, and a branch 37 formed branches 37 are particularly advantageous. bound. In the hole 35 is above adhesive, since this significantly reduces the production the bottom surface a downwardly directed ring is simplified. You can either miger valve seat 41. 25 lay a core during the casting of the individual valves. When the piston valve 17 is moved into a working position at any single point, or the channels can also be milled into the valve, blocked or otherwise cut into the central channel 19 after the casting in the individual, in order to cut the short circuit between the valves. In the latter case, inlet 10 and outlet 11 are to be eliminated, so that the individual valves are cast without grooves, and then in the feed line 21 and in the section of the central end faces located in front of the 30 depending on requirements these grooves later in the actuated valve to cut into the individual valves,
channel 19 builds up a pressure which is then used in the arrangement of the passage line in the opening check valve 26 to the feed channel 24 embodiment according to FIG. 7 individual valves and to the working channel 13 or 14 of the actuated can be arranged more or less arbitrarily. Valve is transmitted. In the actuated position 35 the parallel circuit valves can be operated at any time, without connecting the piston valve in a known manner depending on the location of their attachment in one of the working channels 13, 14 with the feed channel stack and regardless of whether the central channel 19 24 and the other with the return channel 23. from the piston valve of any other individual During assembly, the check valve 36 is shut off valve. The series parallel circle Valves 50 and 51 are only ready to work when none are inserted into the bore 35 from the bottom surface 40 set. The compression spring 42 for the check valve piston slide any in the direction of flow 36 is supported on the upper side 43 of the adjacent individual valve 50 or 52 located in front of it in a Single valve. This type of storage and the working position is postponed. The design of the check valve is essential in the embodiment according to FIG. 7 The lower ends of the non-return valve bores are more leak-proof and also simpler than those previously sealed turned so that the valve unit with uplifting 35 small cup-like stop in a counter bore Lich reduced cost can be produced. fen 60, which is in an outwardly open channel of their Wear an O-ring 62 for leaks at the transitions between the housing-cylindrical wall 61. That Sections of the valve unit can be pushed through the single valve under the plug pushing the latter The seal shown can be prevented, the 50 in the counterbore against the step surface 63. The U.S. Patent 1149,583 is disclosed in detail. In this compression springs 42 of the check valves are supported The mouths of the central channel lie against the stopper 60 to form a seal. LTm to provide a partial assembly 19, the return line 20 and the feed line 21 simple, the check valves can also be used in are secured with snap rings in a limited zone of the individual valve frontal their bores, area that can be secured with a single O-ring 44, the 55. The plugs and circlips can also be used in the is used in a channel 45 between two adjacent embodiments according to FIGS. 1 to 6 Embedding sections, may include. They will too. Sections 39 of the holes 35, for the non-return _p . . .., Valves 36 are within the requirements of the O-rings 44: given zones. The channel 45 delimits a flat 60 1st valve unit for reversible hydraulic with the return line 20 connected recess lische motors, consisting of a group of 46, which have individual housing sections on the underside of the individual valve with one on top of the other. The intended valve part 7, which seals on the mating surfaces and with a through all the flat top side 43 of the adjacent single section through feed line and with valve is applied. In addition to the check valves on 65 at least one between end sections He- the separating point between the individual valves possibly lowing housing part with a control slide escaping leakage flow passes through the recess to connect the feed line with an ar- 46 to reflux line 20. is connected by a joint venture, thereby indicates that in the feed line (24) between the feed line (19, 21) and the control slide (17) has a bore for receiving a load-holding check valve (36) is arranged, which opens into the mating surface, the check valve from the adjacent Housing section is kept closed. 2. Valve unit according to claim 1, characterized characterized in that the inflow end of the bore for receiving the check valve with an adjacent feed line (19, 21) through a milling (37) in the mating surface connected is. . Considered publications: German Patent No. 863 580; German exploratory documents No. 1093 625, 037; U.S. Patent Nos. 1955 154, 2617445, 000. For this purpose 2 sheets of drawings 509 757/219 11.65 © Bundesdruckerei Berlin