Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1996-10-15
1998-07-14
Lee, Kevin
Valves and valve actuation
Electrically actuated valve
Including solenoid
3031192, F16K 3102
Patent
active
057792216
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on an electrohydraulic pressure adjusting device as defined hereinafter.
From German Patent Disclosure DE 41 00 967 A1, such an electrohydraulic pressure adjusting device is already known, in which the coils of magnet valves are suspended elastically resiliently from a hoodlike cap, so as to be alignable relative to a valve lock when joined to it, or in other words alignable radially and axially. To that end, elastic mounts are provided, in the form of helical compression springs, between the cap and the coils so as to generate a force on the coils oriented counter to the valve block. After the joining, the location of the coils is to be secured by a defined axial contact pressure of the coils against the valve block. As long as the joining operation has not yet been performed, however, the coils are braced in the cap against the stop so as to absorb the force of the springs, so that contact elements that connect the coils to an electronic controller in the cap located above the coils will not be overloaded. The structural expense for absorbing a spring forces in a cap is relatively great.
ADVANTAGES OF THE INVENTION
Another pressure adjusting device according to the invention having the characteristics of the body of the claim has the advantage over the prior art that the spring force does not become effective until the coil is joined to the valve block, or in other words contact elements of the coil are not subjected to any strain from the spring force prior to the joining operation. Moreover, a spring element can be embodied as a sheet-metal spring of only slight structural height. A relatively shallow spring characteristic curve can also be attained, which advantageously limits changes in force over the spring travel.
By the provisions recited herein, advantageous further features of and improvements to the pressure adjusting device disclosed are possible.
One embodiment of the invention has an advantage of inducing the spring force into the coil without a lateral force.
With further feature of the invention, advantages in terms of manufacturing and assembly are attained by the one-piece form of the sheet-metal spring that can be used with a plurality of coils.
Another provision has an advantage that the sheet-metal spring can be mounted beforehand in captive fashion, and when arranged on the cap can also provide transport protection for the coil located in the cap.
BRIEF DESCRIPTION OF THE DRAWINGS
One exemplary embodiment of the invention is shown in simplified form in the drawing and described in further detail in the ensuing description. FIG. 1 shows a view of a pressure adjusting device during joining of coils, received in a cap, to a valve block; and FIG. 2 is a view in the direction of the arrow II of FIG. 1 of a spring element disposed between the coils and the valve block.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
An electrohydraulic pressure adjusting device 10 shown in FIG. 1 for a slip-controlled vehicle brake system substantially comprises a valve block 11, in which valves 12 are received, and a hoodlike cap 13 with electrical elements disposed in it, such as coils 14, for the electromagnetic actuation of the valves 12.
FIG. 1 shows a state when the cap 13 is joined to the valve block 11. In the fully assembled state, the cap 13 is united with the valve block 11 along a support face 15 of the valve block and is joined by means of screws 16.
The valves 12 are disposed in the valve block 11 in two rows that extend parallel to one another, perpendicular to the plane of the drawing. The coils 14 are arranged inside the cap 13 in the same way and substantially comprise a winding, a winding carrier, connection wires, and a magnetic flux-conducting jacket. The coils 14 are joined to an electronic controller 20, disposed in the cap 13, by resilient electrical contact elements 19. Because of the resilience of the contact elements 19, the coils 14 can be subjected to changes in their location in the cap 13 in the axial and radial directions relative to their
REFERENCES:
patent: 5364067 (1994-11-01), Linkner, Jr.
patent: 5462344 (1995-10-01), Jakob et al.
Friedow Michael
Glock Gunther
Lander Jurgen
Pechtold Ulrich
Staib Helmut
Greigg Edwin E.
Greigg Ronald E.
Lee Kevin
Robert & Bosch GmbH
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