Abstract:
The invention relates to a valve block, in particular a hydraulic valve block, which comprises a basic body having a base area and a plurality of blind holes, in particular valve bores, and lamellae, having a plurality of valve actuating devices, in particular electromagnets, and having a plurality of connections, in particular hydraulic connections. The invention is distinguished by the fact that the basic body has an encircling sealing surface, running obliquely relative to the base area, for a protective hood, in particular an oil pan.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This is a continuation of International Application Serial No. PCT/DE2006/002085, having an international filing date of Nov. 27, 2006, and designating the United States, the entire contents of which is hereby incorporated by reference to the same extent as if fully rewritten. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to a valve block, in particular a hydraulic valve block, which includes a basic body having a base area and a plurality of blind bores, in particular valve bores and lamellae, having a plurality of valve actuating devices, in particular electromagnets, and having a plurality of connections, in particular hydraulic connections. 
     An object of the present invention is to optimize a valve block with regard to the requisite construction space. 
     SUMMARY OF THE INVENTION 
     The object is achieved with a valve block, in particular a hydraulic valve block, which includes a basic body having a base area and a plurality of blind bores, in particular valve bores and lamellae. The valve block includes a plurality of valve actuating devices, in particular electromagnets, and a plurality of connections, in particular hydraulic connections, by the fact that the basic body has an encircling sealing surface, running obliquely relative to the base area, for a protective hood, in particular an oil pan. The basic body has essentially the form of a cuboid, and is of labyrinthine construction, equipped with a plurality of blind bores, in particular valve bores and lamellae. The valve bores serve, for example, to receive valve elements, in particular valve plungers. The lamellae serve to connect the valve bores to each other, with inlet ports and/or outlet ports for a hydraulic medium. The oblique position of the sealing surface simplifies access to the valve block on an attachment and processing surface that is situated perpendicular to the base area. 
     One preferred exemplary embodiment of the valve block is characterized in that the basic body has a step with an attachment surface, in particular a solitary attachment surface, for the valve actuating devices. The step makes it possible to accommodate the valve actuating devices within the protective hood in a simple manner. 
     Another preferred exemplary embodiment of the valve block is characterized in that the attachment surface for the valve actuating devices is situated perpendicular to the base area. That simplifies access with processing tools in the axial direction, i.e., parallel to the base area. 
     Another preferred exemplary embodiment of the valve block is characterized in that the attachment surface for the valve actuating devices has a plurality of blind bores, in particular valve bores. The blind bores are provided in the attachment surface and the basic body before the valve actuating devices are installed. Preferably, all valve bores of the basic body are provided in the attachment surface. 
     Another preferred exemplary embodiment of the valve block is characterized in that the basic body has a functional surface, in particular a solitary functional surface, with additional blind bores, in particular lamellae. Due to the additional blind bores, in particular lamellae, the blind bores made in the attachment surface, in particular valve bores, are partially connected to each other in labyrinthine construction. Preferably, all lamellae of the basic body are provided in the functional surface. 
     Another preferred exemplary embodiment of the valve block is characterized in that the functional surface is situated parallel to the base area. That simplifies working on the valve block. 
     Another preferred exemplary embodiment of the valve block is characterized in that a cover piece is attached to the functional surface. The cover piece serves to seal the blind bores in the basic body. Furthermore, the cover piece can be provided with additional blind bores. Preferably, an intermediate plate is clamped between the functional surface and the cover piece. 
     Additional preferred exemplary embodiments of the valve block are characterized in that the valve body has a further functional surface with blind bores, in particular lamellae, and/or a further attachment surface for additional valve actuating devices, with a plurality of blind bores, in particular valve bores. That heightens the functionality of the valve block. 
     Another preferred exemplary embodiment of the valve block is characterized in that the additional attachment surface is situated in the same plane as the attachment surface of the basic body. The additional attachment surface preferably directly adjoins the attachment surface of the basic body. 
     Another preferred exemplary embodiment of the valve block is characterized in that the basic body has a connection surface with a plurality of connections, in particular hydraulic connections, on its side facing away from the attachment surface. This arrangement simplifies access to the connections, without which the available labyrinthine construction space would be affected adversely. 
     Another preferred exemplary embodiment of the valve block is characterized in that the contact surface runs perpendicular to the base area. Preferably, the connections are situated outside of the protective hood. 
     Another preferred exemplary embodiment of the valve block is characterized in that the base area has an elevated area having at least one additional connection surface with additional connections, in particular hydraulic connections. The additional connections simplify linking to already existing line systems. 
     Another preferred exemplary embodiment of the valve block is characterized in that the sealing surface of the basic body is connected in a sealing manner to a sealing surface of a protective hood, in particular an oil pan. The protective hood serves to enclose the valve block. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Additional advantages, features and details of the invention can be seen from the following description, in which various exemplary embodiments are described in detail with reference to the drawings. The figures show the following: 
         FIG. 1 : a perspective depiction of a valve block according to a first exemplary embodiment; 
         FIG. 2 : a perspective depiction of the valve block of  FIG. 1  with a protective hood placed on top, and 
         FIG. 3 : a perspective depiction of a valve block according to a second exemplary embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       FIGS. 1 and 2  show a valve block  1  in perspective view from different viewing angles. Valve block  1  includes a basic body  2 , which essentially has the form of a cuboid. Due to the essentially cuboid shape of basic body  2 , the latter is also described as the base plate. Basic body  2  has a flat top side  4  and a flat bottom side  5 . In addition, basic body  2  has a front side  6  and a back side  7 . Finally, basic body  2  is delimited on the sides by two lateral faces  8  and  9 . The front side  6 , back side  7 , and lateral faces  8 ,  9  are essentially of flat design, and are joined to each other by sloping surfaces and/or roundings. 
     According to an essential aspect of the present invention, basic body  2  is connected to an encircling shoulder  11 . Encircling shoulder  11  extends around the entire periphery of basic body  2 . In the area of the front side  6  and the back side  7  the height of the shoulder is constant. In the area of the lateral faces  8 ,  9  the encircling shoulder  11  has the form of a ramp, which rises continuously from the front side  6  to the back side  7  of basic body  2 . The top side, i.e., the side of encircling shoulder  11  facing away from the bottom side  5 , forms a sealing surface  12  for a protective hood ( 41  in  FIG. 2 ). 
     Basic body  2  has a step  13  on its front side  6 . Step  13  is formed by an attachment surface  10 , which is situated on the front side  6  of basic body  2  perpendicular to the bottom side  5 , which is also referred to as the base surface. The two lateral faces  8  and  9  are likewise situated perpendicular to base area  5 . The back side  7  is likewise situated perpendicular to base area  5 . The two lateral faces  8 ,  9  are situated perpendicular to the front side  6  and the back side  7 . 
     Step  13  extends from attachment surface  10  as an extension of base area  5 . Step  13  is enclosed by encircling shoulder  11 . According to another essential aspect of the invention, attachment surface  10  is provided with a plurality of blind bores, in particular valve bores. Among other purposes, the blind bores serve to receive valve plungers. The valve plungers are operated with the aid of valve actuating devices  14  and  15 , which are attached to attachment surface  10 . The valve actuating devices are, for example, electromagnets. 
     The valve actuating devices are situated completely in the area of the step  13 , which is enclosed by the encircling shoulder  11 . The axial processing direction, in which the blind bores are formed in the attachment surface  10 , is indicated by an arrow  16 . According to an essential aspect of the invention, the valve actuating devices  14 ,  15  are placed only on the front side  6  of the basic body  2 . The step  13 , which is formed by a projection extending in the opposite direction to arrow  16 , simplifies the enclosure of the valve actuating devices by the protective hood  41  (in  FIG. 2 ). The oblique course of the encircling sealing surface  12  on the lateral faces  8 ,  9  of basic body  2  improves access to attachment surface  10  significantly. 
     On the bottom side  5  of basic body  2 , which is also referred to as the base surface, an elevated area  18  is formed which forms a connection console with a connection surface  19 . Four hydraulic connections  21  through  24  are attached to connection surface  19 . Connection surface  19  is situated at an angle of about 70 degrees relative to the base area  5 . Furthermore, an additional connection surface  28  with additional hydraulic connections  31 ,  32  is provided on the back side  7  of basic body  2 . The additional connection surface  28  on the back side  7  of basic body  2  is formed on the encircling shoulder  11 . That ensures that the additional connections  31 ,  32  are not covered by protective hood  41 , as shown in  FIG. 2 . 
     The top side of basic body  2  has a flat functional surface  4 , which is situated parallel to base area  5 . This functional surface is equipped with a plurality of blind bores in the form of lamellae, which partially connect the valve bores with each other. In addition, the lamellae serve to join the valve bores with connections  21  through  24  and  31 ,  32 . A cover piece  35  that has an additional flat functional surface on its side facing basic body  2  is set on the top side  4  of basic body  2 . The flat functional surface is equipped with additional blind bores in the form of lamellae. The cover piece has essentially the form of a cuboid, and therefore is also referred to as cover plate  35 . Cover plate  35  has on its front side  36  an additional attachment surface, which is situated in the same plane as attachment surface  10  of basic body  2 . The additional attachment surface on the front side  36  of cover piece  35  is equipped with additional blind bores in the form of valve bores. Furthermore, additional valve actuating devices  38 ,  39  in the form of electromagnets are attached to the attachment surface on the front side  36  of cover piece  35 . 
     The one-sided arrangement of the valve actuating devices  14 ,  15  and  38 ,  39  results in the back side  7  of basic body  2  being available for the hydraulic connections  31 ,  32 . In  FIG. 2  it can be seen that the complete enclosure of valve actuating devices  14 ,  15  and  38 ,  39  with the aid of protective hood  41 , which is also referred to as an oil pan, is not impaired. Hydraulic connections  21  through  24  and  31 ,  32  are situated outside of protective hood  41 . 
       FIG. 3  depicts a perspective view of an exemplary embodiment of a valve block  51  similar to valve block  1  in  FIG. 1 . Valve block  51  has a spaced area  58  on its bottom side  55 , with a connection surface  59 . Four connection points  61  through  64  for hydraulic connections are provided on connection surface  59 . On the side opposite connection surface  59 , spaced area  58  has an essentially cuboid-shaped extension  68 , whose end facing away from connection surface  59  is equipped with additional connection points  71 ,  72 . That further improves the freedom of design when connecting hydraulic lines to valve block  51 . Furthermore, it can be seen in  FIG. 3  that two raised areas  74  and  75  essentially in the nature of truncated cones are provided on the bottom side  55  of valve block  51 . The two raised areas  74  and  75  serve to attach valve block  51  to a supporting structure (not shown) of a motor vehicle, with damping elements interposed.