U.S. patent number 3,756,274 [Application Number 05/243,782] was granted by the patent office on 1973-09-04 for connection element for construction of a base plate for hydraulic devices.
This patent grant is currently assigned to Robert Bosch GmbH. Invention is credited to Hans-Jurgen Wolfgramm.
United States Patent |
3,756,274 |
Wolfgramm |
September 4, 1973 |
CONNECTION ELEMENT FOR CONSTRUCTION OF A BASE PLATE FOR HYDRAULIC
DEVICES
Abstract
A substantially prism-shaped connection element for construction
of a base plate for pressure fluid devices such as valves, in which
the element is formed with a plurality of channels and bores
therethrough so that the valves carried by the base plate may be
connected to supply of pressure fluid and to external utilization
circuits without the use of piping. The channels and bores in each
connecting element are arranged in such a manner that a plurality
of connection elements may be connected into a base plate with the
channels in the plurality of connecting elements communicating with
each other while each of said connection elements may be arranged
in a selected one of a plurality of positions to permit a maximum
number of different base plates to be assembled from a minimum
number of different elements.
Inventors: |
Wolfgramm; Hans-Jurgen
(Nellingen, DT) |
Assignee: |
Robert Bosch GmbH (Stuttgart,
DT)
|
Family
ID: |
5805283 |
Appl.
No.: |
05/243,782 |
Filed: |
April 13, 1972 |
Foreign Application Priority Data
|
|
|
|
|
Apr 21, 1971 [DT] |
|
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P 21 19 224.5 |
|
Current U.S.
Class: |
137/561R;
137/561A; 137/271; 137/884 |
Current CPC
Class: |
F15B
13/0821 (20130101); F15B 13/0882 (20130101); F15B
13/0817 (20130101); F15B 13/0896 (20130101); Y10T
137/5283 (20150401); Y10T 137/85938 (20150401); Y10T
137/87885 (20150401); Y10T 137/8593 (20150401) |
Current International
Class: |
F15B
13/00 (20060101); F15c 004/00 () |
Field of
Search: |
;137/561R,561A,608,269,271 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Cline; William R.
Claims
What is claimed as new and desired to be protected by Letters
Patent is set forth in the appended claims:
1. A connection element for pressure fluid devices comprising a
substantially prism shaped block having two opposite substantially
parallel end faces and two opposite mounting faces extending
between and substantially normal to said end faces, said block
being formed with five channels extending from one to the other of
said end faces and having open ends on each of said end faces
symmetrically arranged with respect to two axes which are normal to
each other, the open ends of four of said channels being arranged
at each of said end faces at the corners of a rectangle and the
open ends of the fifth channel being arranged at the center of the
rectangle and adapted to be connected to a pressure fluid supply,
said block being further provided with openings for fastening said
block to another connection element and said fastening openings
being arranged symmetrically with respect to said two axes; and
including four cross bores having outer open ends located at one of
said mounting faces for connection to a valve, the inner end of one
of said four cross bores communicating with said fifth channel and
the remaining three of the four cross bores communicating with
three of the other channels of which two have open ends at one of
the longer sides of said rectangle, and two further cross bores
having outer ends at the other mounting face for connection to
external utilization circuits and communicating at the inner ends
thereof with said two channels.
2. A connection element as defined in claim 1, wherein said block
is provided with two pairs of flanges respectively projecting to
opposite sides of said end faces, said fastening openings being
provided in said flanges.
3. A base plate for pressure fluid devices comprising a plurality
of connection elements, each of said connection elements comprising
a prism-shaped block having a pair of end faces and being formed
with five channels extending between said end faces, said channels
having on each of said end faces open ends symmetrically arranged
with respect to two axes which are normal to each other and the
open ends of four of said channels being respectively located at
each of said end faces at the corners of a rectangle and the open
end of the fifth channel being located at the center of the
rectangle, said plurality of connection elements being arranged
abutting with said end faces thereof against each other and with
said channels respectively aligned with each other, at least some
of said prism shaped connecting elements having opposite muounting
faces substantially normal to said end face and being formed with a
plurality of cross bores each communicating at an inner end thereof
with a respective one fo said channels, two of said cross bores
having outer open ends located at one of said opposite mounting
faces and the other of said cross bores having outer open ends
located at the other of said mounting faces; external utilization
circuits connected to the open ends of said two cross bores; valve
means mounted on said other mounting face and communicating with
said other cross bores; and a pressure fluid supply line connected
to said fifth channel of one of said connecting elements.
4. A base plate as defined in claim 3, and including connecting
means connecting said blocks to each other for maintaining the end
faces of adjacent blocks in abutting relationship.
5. A base plate as defined in claim 4, wherein each of said blocks
is provided with fastening openings arranged symmetrically with
respect to said two axes, said connecting means comprising bolts
extending through said fastening openings.
Description
BACKGROUND OF THE INVENTION
In complex hydraulic arrangements in which a plurality of valves or
similar fluid pressure operated devices have to be connected to a
fluid supply line and to external utilization circuits, it is known
in the art to mount such valves on a base plate and to construct
the base plate from a plurality of block-shaped connection elements
which are formed with channels and bores therethrough to be
connected at the open ends to the valve passages, a pressure fluid
feed line and external utilization circuits so that the connection
may be made without the use of piping.
It is also known in the art to form the channels and bores in the
connecting blocks in such a manner that the connecting blocks may
be assembled in various positions with each other to obtain in the
base plate different combination of fluid passages
therethrough.
Thus, the German allowed application No. 1,400,475 discloses a
connecting block for the construction of hydraulic circuits without
the use of pipes, in which the connecting block is formed as a
hexagonal block provided with radial bores therethrough, and in
which the open ends on the outer faces of the block are arranged
symmetrically with regard to a central axis of the latter. A
plurality of such blocks may be arranged side-by-side to form a
base plate therefrom. This arrangement permits to arrange each
block in the base plate in only two different positions and due to
the many bores formed in each block the arrangement becomes
complicated and relatively expensive.
Another arrangement is disclosed in the German utility patent No.
6,603,043 in which the base plate is formed by block-shaped
connection elements, reversing elements and intermediate plates so
that a base plate may be formed by a plurality of such elements and
plates abutting against each other. The blocks and plates of this
arrangement are formed with channels therethrough which are
arranged symmetrically with regard to a single axis so that the
fluid passage combinations obtainable with this arrangement are
also limited.
A further arrangement of this type is disclosed in the British
patent No. 1,206,828 in which a connection block is formed with
seven passages therethrough the open ends of which are arranged at
opposite end faces of the block along a substantially H-shaped
outline. In this arrangement the channel coordinated with the fluid
supply line and the adjacent channels coordinated with the external
utilization circuits are arranged on a straight line. While the
open ends of the aforementioned channels are arranged symmetrically
with respect to two axes which are normal to each other, the
arrangement disclosed in the British patent provides only for a
rather limited variation of fluid circuits formed by a plurality of
such connection elements. In addition, the great number of channels
extending through each of the connecting blocks makes this
arrangement complicated and expensive.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide for a
connection element for construction of a base plate for hydraulic
devices which avoids the disadvantages of such connection elements
known in the art.
Iy is a further object of the present invention to provide for such
a connection element which is simple in its construction and which
permits to construct a base plate from a plurality of such
connection elements arranged in different positions with respect to
each other so that a maximum number of different base plates may be
assembled from a minimum number of such connection elements.
With these and other objects in view, the connection element for
pressure fluid devices mainly comprises a block having two opposite
end faces and being formed with five channels extending from one to
the other of the end faces and having open ends on each of the end
faces symmetrically arranged with respect to two axes which are
normal to each other, the open ends of the aforementioned channels
being respectively arranged on each of the ends faces at the
corners of a rectangle and the open end of the fifth channel being
arranged at the center of the rectangle. The fifth channel being
coordinated with a pressure fluid supply and at least some of the
four channels being coordinated with external utilization
circuits.
In this way each of the connection elements may be arranged in a
base plate in four different mounting positions in which the
position of the channels coordinated with the external utilization
circuits will be changed. In this way, it is possible to provide a
great number of variations in the fluid circuits within the base
plate with a minimum of connection elements.
An especially advantageous arrangement is derived when two of the
channels are coordinated with the external utilization circuits and
when the open ends of these two channels are located at the corners
of one of the longer sides of the rectangle.
The novel features which are considered as characteristic of the
invention are set forth in particular in the appended claims. The
invention itself, however, both as to its construction and its
method of operation, together with additional objects and
advantages thereof, will be best understood from the following
description of specific embodiments when read in connection with
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING
FIGS. 1-4 are perspective views of a connection element and
respectively showing this connection element in four different
mounting positions in which the connection element may be assembled
with similar elements to a base plate;
FIGS. 5-8 are diagrammatic views respectively corresponding to the
different mounting positions of the connection element shown in
FIGS. 1-4;
FIG. 9 is a perspective view of another connection element;
FIG. 10 is a diagrammatic view of the connection element shown in
FIG. 9;
FIG. 11 is a side view of a part of a base plate formed by a
plurality of connection elements as showh in the preceeding
Figures; and
FIG. 12 is a diagrammatic view showing the fluid circuits provided
in said part of said base plate by the plurality of connection
elements.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawing, and more specifically to FIG. 1 of
the same, it will be seen that a connection element according to
the present invention may comprise a substantially prism-shaped
block 10 having a pair of opposite planar end faces 12 and 13 and a
pair of opposite mounting faces 31 and 37 extending between and
substantially normal to the aforementioned end faces 12 and 13. The
block 10 is formed with five channels 14'-18' extending between the
opposite end faces 12 and 13, substantially normal thereto. The
channels 14'-18' have respectively open ends 14, 15, 16, 17 and 18
at each of the end faces 12 and 13. The open ends of four of the
channels, that is the open ends 15, 16, 17 and 18 at each of the
end faces, are respectively located at the corners of an imaginary
rectangle, whereas the open end 14 of the fifth channel 14' is
located at the intersections of the diagonals of the aforementioned
rectangle, that is at the center of the rectangle, so that the open
ends of the five channels at each of the end faces are arranged
symmetrically with regard to two axes which are normal to each
other.
The block 10 is further provided with four flanges 24, 25, 26 and
27 which respectively form extensions to opposite sides of the end
faces 12 and 13 and which are respectively formed with fastening
openings 20, 21, 22 and 23, through which bolts or similar
connecting members may extend for connecting the block 10 in a base
plate to other blocks of similar construction. The fastening
openings 20--23 are likewise arranged symmetrically with respect to
the aforementioned two axes.
The mounting face 31 of the connection element 10 serves to mount a
valve, not shown in FIG. 1, on the connection element. For this
purpose, there are provided four tapped holes 36 extending from the
mounting face 31 into the block 10 for fastening such a valve to
the mounting face and there are further provided four connecting
openings 32, 33, 34 and 35 to be aligned with corresponding ports
of the valve. The opposite mounting face 37 is provided with two
tapped connecting openings 38, 39 for connecting pipes, not shown
in FIG. 1, for external utilization circuits to the block 10.
As indicated in FIG. 1 and as also shown in the diagrammatic FIG.
5, the channel 14' which is to be connected to a pressure fluid
feed line is connected by means of a cross bore with the opening 34
(valve connection P), the channel 15' is connected through a cross
bore with the opening 39 on the face 37, which opening 39 is
coordinated with a first external utilization circuit and the
channel 15' is also connected by a cross bore with the opening 33
(valve connection A), the channel 16' is connected with the opening
38 coordinated with the second external utilization circuit and
likewise connected by means of a cross bore with opening 35 (valve
connection B), while the channel 17' which is coordinated with a
return circuit is connected by means of a cross bore with the
opening 32 (valve connection R). The channel 18' is not connected
by any cross bores to openings on either of the mounting faces, and
this channel may serve when the connection element 10 is connected
to similar elements as will be described later on in detail to have
different functions.
FIG. 2 shows the connection element 10 in a position turned through
180.degree. about a vertical axis, and this position is the second
mounting position which the element may have when connected to
other similar elements. As shown in FIG. 2, the position of the
holes 16, 18 and 15, 17 is reversed with respect to the position of
these holes as shown in FIG. 1, that is while the holes 15 and 17
are on the left side of the block, as viewed in FIG. 1, they are on
the right side of the block as viewed in FIG. 2. The corresponding
symbol of the arrangement in the second position of the block 10 is
shown in FIG. 6.
FIG. 3 shows the block 10 in a third mounting position which is
obtained by turning the block from the position shown in FIG. 1
through 180.degree. about the axis of the channel 14' so that the
mounting surface 31 for the connection of the valve faces
downwardly and the second mounting surface 37 for connecting of the
external utilization circuits faces upwardly. The position of the
openings 15-18 on the end face 12 in the third position of the
block 10 also differs from the position of these openings as shown
in FIGS. 1 and 2, as clearly evident from FIG. 3. FIG. 7 shows the
corresponding symbol for the position of the block as shown in FIG.
3.
FIG. 4 shows the block 10 in a fourth mounting position which is
obtained by turning the block 10 from the position as shown in FIG.
2 through 180.degree. about the axis of the channel 14. The
corresponding symbol as shown in FIG. 8.
It will be noted that in all four positions the respectively
illustrated in FIGS. 1-4, the position of the central channel 14',
which is to be connected to a pressure fluid feed line, remains the
same, whereas the position of the channels 15 and 16 which are
coordinated with the external utilization circuits, is changed.
The fact that the first mounting surface 31 to which the valve has
to be connected faces in the positions as shown in FIGS. 1 and 2
upwardly and in the positions as shown in FIGS. 3 and 4 downwardly
is immaterial when such connection elements are combined with each
other to form a base plate since in such a base plate it may
sometimes be of advantage to mount some of the valves on the bottom
surface of the base plate.
FIG. 9 shows a different element 40 to be connected to elements as
shown in FIG. 1 into a base plate, which does not serve to carry
valves or similar fluid operated devices, but which serves only to
connect and to form fluid passages between two elements as shown in
FIGS. 1-4. For this purpose, the element 40 is provided, in the
same manner as the element 10, with five channels 14'-18'
therethrough (see also FIG. 10) having open ends 14-18 on the end
face 12 and on the corresponding opposite end face, not shown in
FIG. 9. The open ends 14-18 are arranged in exactly the same
pattern as shown in FIG. 1, that is the openings 15-18 are
respectively arranged at corners of a rectangle, whereas the
opening 14 is arranged in the center of this rectangle. The block
14 is also provided with four flanges formed with fastening
openings 21-23 to be aligned with the corresponding openings shown
in FIG. 1. As shown in FIG. 10, the block 40 is provided with at
least one cross bore which may for instance extend between the
channels 14' and 15' or between any other two channels.
FIG. 11 schematically illustrates a part of a base plate formed
from a block 10, a block 40' and a block 10'. These blocks abut
with the end faces thereof against each other and are held in
abutting arrangement by bolts 41 which pass through the openings
21-23 formed in the flanges of the blocks. The block 10 is mounted
in the base plate in the position as illustrated in FIG. 1, block
40' corresponds to block 40 illustrated at FIG. 9, but as evident
from the diagrammatic showing of FIG. 12, the block 40 is formed
with a cross bore which extends between the channels 15' and 17'.
The block 10' is similar to the block 10 but is mounted in the
position as illustrated in FIG. 2 as is evident from FIG. 12. FIGS.
11 and 12 schematically also show two different valves 45 and 46
mounted on the upper mounting face of the blocks 10 and 10'.
Depending on the type of valve used, the connection of the various
channels with the ports of the valve may be made as for instance
schematically illustrated in FIG. 12 in which the channel 16' is
connected to the port B of the valve 45 and the external
utilization circuit 43, the channel 15' is connected to the port A
of the valve and the external utilization circuit 44, the channel
14' is connected to the port P of the valve and to a fluid feed
line (not shown), and the channel 17' is connected to the port R of
the valve. In the block 40' the cross bore is shown to connect the
channels 14' and 17' and in the block 10' the channel 14' is
connected to the port P of the valve 46. The channel 16' is
connected to the port B of the valve 46, and to the external
utilization circuit 43' and the channel 15' is connected to the
port A and to the other external utilization circuit 44'. The
channel 17' is connected to the port R in the valve 46. In the
blocks 10 and 10' are arranged plugs 42 to provide suitable
connections. Evidently, each of the blocks 10 and 10' may be
mounted in four different positions as described in connection with
FIGS. 1-4 and likewise the block 40' may be mounted in four
different positions so that a great number of different fluid
passage variations may be obtained with the arrangement as shown in
FIGS. 11 and 12.
The open ends of channels and cross bores which are not connected
to piping or fluid pressure devices are closed by plugs in a manner
well know in the art.
It will be understood that each of the elements described above, or
two or more together, may also find a useful application in other
types of connection elements for pressure fluid devices differing
from the types described above.
While the invention has been illustrated and described as embodied
in a connnection element to be assembled in various mounting
positions with similar connection elements to form a base plate for
hydraulic devices, it is not intended to be limited to the details
shown, since various modifications and structural changes may be
made without departing in any way from the spirit of the present
invention.
Without further analyses, the foregoing will so fully reveal the
gist of the present invention that others can be applying current
knowledge readily adapt it for various applications without
omitting features that, from the standpoint of prior art, fairly
constitute essential characteristics of the generic or specific
aspects of this invention and, therefore, such adaptations should
and are intended to be comprehended within the meaning and range of
equivalence of the following claims.
* * * * *