Electrohydraulic actuating device having integrated electrical functional elements
An electrohydraulic actuation device is descried with an electric motor and a pump driven by the electric motor for the operation of a hydraulic unit with a positioning cylinder, a piston and a piston rod serving as actuation element and projecting from a housing, wherein the electric motor and the hydraulic unit are each housed in a housing part of the housing, wherein the housing part of the hydraulic unit is separated from and sealed off from the housing part for housing the electric motor, wherein the housing has at least in the area of the hydraulic unit a lateral enlargement in relation to the longitudinal axis X of the device, beyond the circumference of the positioning cylinder and at least along a height of a stroke of the piston.
1 . Electrohydraulic actuation device with an electric motor and a pump driven by the electric motor for the operation of a hydraulic unit, wherein the hydraulic unit comprises a positioning cylinder, a piston and a piston rod, wherein the piston rod serves as an actuation element and projects outward from a housing,
wherein the housing comprises a lower housing part and an upper housing part, wherein the upper housing part is separated and sealed off from the lower housing part, wherein the electric motor is housed in the lower housing part, and the hydraulic unit is housed in the upper housing part,
wherein the housing has at least in an area of the hydraulic unit a lateral enlargement as a local protrusion of the housing at least one side in relation to a longitudinal axis X of the device, beyond the circumference of the positioning cylinder and at least along a height of a stroke of the piston,
wherein the lateral enlargement allows for electrical functional elements to be housed directly in the upper housing part, laterally adjacent to the hydraulic unit,
wherein the housing comprises connections or receiving means for the electrical functional elements, and
wherein the electrical functional elements comprise at least a contact-free, magnetic-induction sensor, which is arranged and configured for position detection of the piston by means of at least a magnet mounted thereon.
2 . The electrohydraulic actuation device according to claim 1 , wherein the lateral enlargement of the housing forms a lateral receiving area approximately rectangular in cross section for functional elements.
3 . The electrohydraulic actuation device according to claim 1 , wherein that the lateral enlargement is provided with connection openings to a terminal box for electrical connections.
4 . The electrohydraulic actuation device according to claim 3 , wherein the connection or receiving means of the electrical functional elements are provided in a partitioning bottom between the upper housing part and the lower housing part.
5 . The electrohydraulic actuation device according to claim 1 , wherein the electrical functional elements comprise at least an electric heating means which projects into the hydraulic oil of the hydraulic unit.
6 . The electrohydraulic actuation device according to claim 1 , wherein the lateral enlargement is provided above and in continuation to a terminal box for electrical connections of the device.
7 . The electrohydraulic actuation device according to claim 1 , wherein the housing at the inside of a wall of the lateral enlargement is provided with a recess for forming a receiving area for the electrical functional elements.
8 . The electrohydraulic actuation device according to claim 1 , wherein the electrical functional elements in the hydraulic part of the housing have an encapsulated constructional shape.