Fluid pressure control device

Abstract

A fluid pressure control device including a housing having a hydraulic circuit, a pump built into the housing, a motor for driving the pump, a circuit board for controlling the motor and a solenoid valve for changing an amount of venting of the hydraulic circuit. The motor, the circuit board and the solenoid valve dispose on a same side of the housing.

1 . A fluid pressure control device, comprising: 
 a housing comprising a hydraulic circuit;    a pump built into the housing;    a motor for driving the pump;    a circuit board for controlling the motor;    a solenoid valve for changing an amount of venting of the hydraulic circuit;    wherein the motor, the circuit board and the solenoid valve are disposed on a same side of the housing.    
   
   
       2 . The fluid pressure control device as claimed in  claim 1 , 
 further comprising a casing;    wherein the motor, the circuit board and solenoid valve are covered by the casing.    
   
   
       3 . The fluid pressure control device as claimed in  claim 2 , 
 wherein the circuit board is in contact with the casing.    
   
   
       4 . The fluid pressure control device as claimed in  claim 3 , 
 wherein a cooling fin is formed on an exterior of the casing.    
   
   
       5 . The fluid pressure control device as claimed in  claim 1 , 
 wherein the pump has at least one drive gear and at least one driven gear, the drive gear engages the driven gear;    the drive gear is connected to the motor;    and the drive gear is disposed on an area that is between the driven gear and the solenoid valve.    
   
   
       6 . The fluid pressure control device as claimed in  claim 5 , 
 further comprising a casing;    wherein the motor and the circuit board and the solenoid valve are covered by the casing.    
   
   
       7 . The fluid pressure control device as claimed in  claim 6 , 
 wherein the circuit board is in contact with the casing.    
   
   
       8 . The fluid pressure control device as claimed in  claim 7 , 
 wherein a cooling fin is formed on an exterior of the casing.    
   
   
       9 . The fluid pressure control device as claimed as  claim 1 , 
 wherein the motor includes a brushless motor and a position sensor;    the sensor detects a position of a rotor of the brushless motor.    
   
   
       10 . The fluid pressure control device as claimed in  claim 9 , 
 further comprising a casing;    wherein the motor, the circuit board and the solenoid valve are covered by the casing.    
   
   
       11 . The fluid pressure control device as claimed in  claim 9 , 
 wherein the pump has at least one drive gear and at least one driven gear, the drive gear engages the driven gear;    the drive gear is connected to the motor;    and the drive gear is disposed on an area that is between the driven gear and the solenoid valve.    
   
   
       12 . The fluid pressure control device as claimed in  claim 1 , 
 further comprising a pressure sensor for detecting a pressure of the hydraulic circuit;    wherein the pressure sensor is disposed on the same side of the housing.    
   
   
       13 . The fluid pressure control device as claimed in  claim 12 , 
 further comprising a casing;    wherein the motor, the circuit board, the solenoid valve, and the pressure sensor are covered by the casing.    
   
   
       14 . A fluid pressure control device, comprising: 
 a case;    a housing comprising a hydraulic circuit;    a pump built into the housing;    a motor for driving the pump;    a circuit board for controlling the motor; and    a solenoid valve for changing an amount of venting of the hydraulic circuit;    a first assembly comprising the solenoid valve and the motor, which are attached to a same side of the housing;    a second assembly comprising the circuit board, which is fixed to the casing;    wherein the first assembly and the second assembly are assembled each other along a same axis; and    wherein the circuit board, the motor, and the solenoid valve are assembled by assembling the first assembly to the second assembly.    
   
   
       15 . The fluid pressure control device as claimed in  claim 14 , 
 wherein the solenoid valve comprises a valve body and a coil portion;    the valve body is fixed to the housing, an axis of the valve body corresponds to the same axis, and the motor is fixed on the same side of the housing that is fixed to the valve body; and    the coil portion is integrated with the circuit board and corresponds with the axis of the valve body.    
   
   
       16 . The fluid pressure control device as claimed in  claim 14 , 
 further comprising pressure sensor for detecting a pressure of the hydraulic circuit;    wherein the pressure sensor is fixed the first assembly, the pressure sensor is assembled with the circuit board by assembling the first assembly to the second assembly.    
   
   
       17 . A method of assembling a fluid pressure control device, comprising: 
 processing a first assembly by assembling a pump, a motor for controlling the pump and a valve body of a solenoid valve fixed to a housing;    processing a second assembly by assembling a coil portion of the solenoid valve connected with a circuit board that is fixed to a casing; and    assembling the first assembly is assembled to second assembly, the valve body of the solenoid valve being assembled to the coil portion of the valve, and the motor being assembled to the circuit board.    
   
   
       18 . A fluid pressure control device, comprising: 
 a housing comprising a hydraulic circuit;    a pump built into the housing;    a motor;    the pump being driven by the motor;    a circuit board that control the motor; and    a solenoid valve that changes an amount of venting of the hydraulic circuit;    wherein the motor, the circuit board, and the solenoid valve are disposed on a same side of the housing.    
   
   
       19 . The fluid pressure control device, comprising: 
 a housing comprising a hydraulic circuit;    a pump built into the housing;    a motor for driving the pump;    a main circuit board for controlling the motor;    a solenoid valve for changing an amount of venting of the hydraulic circuit;    a sub-circuit board for driving the solenoid valve;    wherein the motor, the main circuit board, the solenoid valve and the sub-circuit board are disposed on a side surface of the housing;    wherein the main circuit board is disposed near the cover such that the cover opposes the side surface; and    the sub-circuit board is disposed between the main circuit board and the solenoid valve.    
   
   
       20 . The fluid pressure control device as claimed in  claim 19 , 
 wherein the casing comprises a main portion surrounding the motor; the main circuit board, the solenoid valve, the sub-circuit board and the cover covering the main portion;    wherein the main circuit board is disposed near the cover.    
   
   
       21 . The fluid pressure control device as claimed in  claim 20 , 
 wherein the cover is made from a metal;    wherein the main circuit board is in contact with the cover.