Pump apparatus with switching valve and driving power transmission device

Patent metadata

Field	Value
Publication number	US-9995348-B2
Application number	US-201414525402-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Oct 29, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A pump apparatus with a switching valve includes an actuator that is rotationally driven, a pump, a switching valve and a driving power interrupting device. The pump discharges a fluid sucked by rotational driving of the actuator. The switching valve is changed in phase by the rotational driving of the actuator so as to be switchable among a plurality of destinations of the fluid discharged from a pump chamber of the pump. The driving power interrupting device for a valve is switchable between a state where rotational driving power of the actuator is transmitted to the switching valve and a state where the rotational driving power of the actuator is interrupted.

First claim

What is claimed is:

1. A pump apparatus with a switching valve, comprising:
an actuator that is rotationally driven;
a pump that discharges a fluid sucked by rotational driving of the actuator;
a switching valve that is changed in phase by the rotational driving of the actuator so as to be switchable among a plurality of destinations of the fluid discharged from a pump chamber of the pump; and
a driving power interrupting device for a valve that is switchable between a state where rotational driving power of the actuator is transmitted to the switching valve and a state where the rotational driving power of the actuator is interrupted,
wherein the pump is a rotary pump that makes the pressure of the sucked fluid high through the rotational driving of the actuator to discharge the high-pressure fluid, and
wherein the pump apparatus with a switching valve further includes a speed change gear that makes a reduction ratio when the rotational driving power of the actuator is transmitted to the rotary pump greater than a reduction ratio when the rotational driving power of the actuator is transmitted to the switching valve.

2. The pump apparatus with a switching valve according to claim 1 , wherein
the driving power interrupting device for a valve transmits the rotational driving power of the actuator in one rotational direction to the switching valve and interrupts the rotational driving power of the actuator in the other rotational direction with respect to the switching valve.

3. The pump apparatus with a switching valve according to claim 2 , wherein
the driving power interrupting device for a valve is a one-way clutch that transmits the rotational driving power of the actuator in the other rotational direction to the switching valve and interrupts the rotational driving power of the actuator in one rotational direction, and
the pump apparatus with a switching valve includes a driving power interrupting device for a pump that is a one-way clutch and transmits the rotational driving power of the actuator in one rotational direction to the pump and interrupts the rotational driving power of the actuator in the other rotational direction.

4. The pump apparatus with a switching valve according to claim 2 , further comprising:
a phase detecting mechanism capable of detecting and positioning the phase.

5. The pump apparatus with a switching valve according to claim 4 , further comprising:
a control device that controls rotational driving of the actuator on the basis of the phase of the switching valve detected by the phase detecting mechanism.

6. The pump apparatus with a switching valve according to claim 4 , wherein
The phase detecting mechanism is constituted of a sensor that is fixed to the housing that rotatably houses the rotary valve and is provided to make the amount of protrusion from an inner peripheral surface of the housing to a radial inner side variable, and a recess that that is formed in an outer peripheral surface of the switching valve and is locked to the sensor in a circumferential direction.

7. The pump apparatus with a switching valve according to claim 1 , wherein
the actuator rotationally drive the pump with the rotational driving power of the actuator in one rotational direction, and
the driving power interrupting device for a valve transmits the rotational driving power of the actuator in the other rotational direction to the switching valve.

8. The pump apparatus with a switching valve according to claim 1 , further comprising:
a housing that rotatably houses the switching valve,
wherein the switching valve includes a braking device that is switchable between a state where the rotation thereof with respect to the housing is constrained and a state where the rotation thereof with respect to the housing is released,
the braking device releases the switching valve when the actuator is rotationally driven in one rotational direction, and
the braking device constrains the switching valve when the actuator is rotationally driven in the other rotational direction.

9. The pump apparatus with a switching valve according to claim 1 , wherein
a rotational axis of the actuator, a rotational axis of the pump, and a rotational axis of the switching valve are coaxially provided,
an end surface of the switching valve forms a side wall of a pump chamber of the pump, and
the pump apparatus with a switching valve includes a housing that houses the pump and the switching valve.

10. The pump apparatus with a switching valve according to claim 9 , wherein
at least one of the switching valve and a surface of the housing facing the switching valve is provided with a circumferential groove into which a fluid discharged from the pump chamber is made to flow, and
the housing is provided with a communication hole that communicates a pressure detecting mechanism with the circumferential groove.

11. The pump apparatus with a switching valve according to claim 10 , further comprising:
a control device that controls rotational driving of the actuator on the basis of the pressure of the fluid detected by the pressure detecting mechanism.

12. The pump apparatus with a switching valve according to claim 9 , further comprising:
a side plate that forms a side wall of the pump chamber opposite to the switching valve,
wherein the pump includes an outer rotor and an inner rotor and includes a cam ring that eccentrically and rotatably supports the outer rotor with respect to the inner rotor, and
the switching valve, the side plate, and the cam ring rotate integrally.

13. The pump apparatus with a switching valve according to claim 12 , wherein
the side plate is housed in the housing, and
a back-pressure chamber, into which the fluid discharged from the pump chamber flows, and applying a pressing force to the pump side to the side plate with the pressure of the fluid, is provided between an end surface of the side plate opposite to the pump chamber in a direction of a rotational axis and the housing facing the end surface of the side plate in the direction of the rotational axis.

14. The pump apparatus with a switching valve according to claim 12 , further comprising:
a thrust bearing arranged at the housing so as to sandwich the pump, the switching valve, and the side plate in the direction of the rotational axis.

15. The pump apparatus with a switching valve according to claim 1 , wherein
the switching valve is changed in phase so as to be switchable among a plurality of return points made to communicate with a suction side of the pump chamber of the pump.

16. The pump apparatus with a switching valve according to claim 1 , wherein
the speed change gear is a reduction gear coupled to the switching valve, and
the rotary pump is directly connected to the actuator.

17. The pump apparatus with a switching valve according to claim 1 , wherein
the speed change gear includes a first reduction gear coupled to the switching valve and a second reduction gear coupled to the rotary pump.

18. The pump apparatus with a switching valve according to claim 1 , wherein
a rotational axis of the actuator, a rotational axis of the rotary pump, a rotational axis of the switching valve, and a rotational axis of the speed change gear are coaxially provided,
an end surface of the switching valve forms a side wall of the pump chamber, and
the pump apparatus with a switching valve includes a housing that houses the rotary pump, the switching valve, and the speed change gear.

19. The pump apparatus with a switching valve a

Assignees

• Jtekt Corp

Inventors

• Yamamori Motoyasu

Classifications

• F01C21/108

  with an axial surface, e.g. side plates · CPC title

• F04C14/24

  characterised by using valves controlling pressure or flow rate, e.g. discharge valves {or unloading valves}(F04C14/10 takes precedence) · CPC title

• F04C2/105 Primary

  Details concerning timing or distribution valves · CPC title

• Y10T137/86123

  Distributor part unitary with movable pump part · CPC title

• Y10T137/86002

  Fluid pressure responsive · CPC title