US2013064699A1PendingUtilityA1

Hydraulic transport device and electrohydraulic control module

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Assignee: SCHAEFFLER TECHNOLOGIES AGPriority: Apr 30, 2010Filed: Oct 30, 2012Published: Mar 14, 2013
Est. expiryApr 30, 2030(~3.8 yrs left)· nominal 20-yr term from priority
Inventors:Marco GrethelRonald GlasMartin StaudingerAndreas AlbertJoachim Buhl
F04B 49/065F01C 21/007F04B 17/03F04B 2201/1201F04B 2203/0209F04C 2/18F04C 14/08F04C 2240/81F04C 2270/052F04C 2270/80F04C 2270/86
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Claims

Abstract

A hydraulic transport device for transporting a hydraulic medium. The device includes at least one externally toothed gear pump that is driven by an electric motor, and a control device attached to the pump. A passive rotational speed detection element is arranged in the pump and interacts with an active rotational speed detection element that is arranged in the control device to detect the rotational speed of the pump shaft.

Claims

exact text as granted — not AI-modified
1 . A hydraulic transport device for transporting a hydraulic medium, said device comprising: at least one rotary hydraulic pump having a pump housing and that is driven by an electric motor; a control device connected with the pump housing and including a control device housing; a passive rotational speed detection element arranged within the pump housing; and an active rotational speed detection element arranged within the control device for interaction with the passive rotational speed detection element for detecting a rotational speed of the hydraulic pump. 
     
     
         2 . The hydraulic transport device according to  claim 1 , wherein the pump is arranged between the electric motor and the control device. 
     
     
         3 . The hydraulic transport device according to  claim 1 , wherein the pump includes a pump shaft having an end that is attached to the passive rotational speed detection element. 
     
     
         4 . The hydraulic transport device according to  claim 3 , wherein the passive rotational speed detection element includes a magnet that is non-rotatably connected to the pump shaft. 
     
     
         5 . The hydraulic transport device according to  claim 3 , wherein the pump shaft is coaxial with a motor shaft of the electric motor. 
     
     
         6 . The hydraulic transport device according to  claim 1 , wherein the active rotational speed detection element is arranged in the control device housing. 
     
     
         7 . The hydraulic transport device according to  claim 6 , wherein the control device housing includes a housing wall that is arranged between the active and the passive rotational speed detection elements. 
     
     
         8 . The hydraulic transport device according to  claim 6  wherein the pump is arranged against a control plate that is positioned between the control device housing and the electric motor. 
     
     
         9 . The hydraulic transport device according to  claim 8 , wherein the electric motor is mounted on the control plate. 
     
     
         10 . The hydraulic transport device according to  claim 1 , wherein at least one tooth of a pump gear having a plurality of teeth is the passive rotational speed detection element. 
     
     
         11 . The hydraulic transport device according to  claim 7 , wherein the control device housing wall has a thickness that allows the passage therethrough of magnetic flux between the active and passive rotational speed elements.

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