JP7010664B2 - Discharge amount control device - Google Patents

Description

The present invention relates to a technical field of a discharge amount control device for controlling a flow amount in a line pressure circuit of hydraulic oil flowing toward a hydraulic mechanism.

Hydraulic oil is supplied to various hydraulic mechanisms operated by hydraulic pressure such as a clutch mechanism, a brake mechanism, and a transmission mechanism in a vehicle for smooth operation and protection. Hydraulic oil is supplied to such a hydraulic mechanism from an oil pump via a line pressure circuit, and hydraulic oil is sucked into the oil pump from an oil tank.

The oil pump has, for example, a type in which an inner rotor having outer teeth and an outer rotor having inner teeth are rotatably supported with respect to the case body in a state of being eccentric. In this type of oil pump, a suction port and a discharge port are formed in the case body, and the volume of the space formed as a pump chamber between the inner rotor and the outer rotor increases as the inner rotor and the outer rotor rotate. By changing the pressure, the pressure in the pump chamber is changed so that the hydraulic oil is sucked from the suction port and the hydraulic oil is discharged from the discharge port.

In such an oil pump, as described above, the pressure in the pump chamber is changed to suck the hydraulic oil from the suction port and discharge the hydraulic oil from the discharge port. Therefore, the pump is pumped in the compression process of the pump chamber. As the pressure in the chamber rises, the drive torque for rotating the inner rotor and the outer rotor may increase.

Therefore, in the conventional oil pump, an intermediate port is formed in the case body in addition to the suction port and the discharge port so that the pump chamber is positioned corresponding to the intermediate port when the inner rotor and the outer rotor rotate. Some of them are configured to reduce the pressure in the pump chamber and suppress the increase in the driving torque (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-191315

By the way, in a vehicle that supplies hydraulic oil to the hydraulic mechanism, the amount of hydraulic oil required differs depending on the operating state of the hydraulic mechanism, so the hydraulic oil is supplied to the hydraulic mechanism in an amount corresponding to the operating state. It is desired to improve the reliability of operation in the mechanism and ensure a smooth operating state.

For example, when the clutch is engaged when the vehicle starts, it is necessary to supply a large amount of hydraulic oil to the hydraulic mechanism to ensure a smooth operating state.

Therefore, an object of the present invention is to suppress an increase in the drive torque of the oil pump, improve the reliability of operation in the hydraulic mechanism, and secure a smooth operating state.

The discharge amount control device according to the present invention is formed between a suction port for sucking hydraulic oil, a discharge port for discharging hydraulic oil sucked from the suction port, and the suction port and the discharge port. A discharge amount control device for an oil pump having an intermediate port for discharging the hydraulic oil sucked from the discharge port, the line pressure circuit in which the hydraulic oil discharged from the discharge port flows toward the hydraulic mechanism, and the line. The discharge amount control circuit that is communicated with the pressure circuit and the hydraulic oil discharged from the intermediate port flows, and the hydraulic oil that flows in the discharge amount control circuit are stored and the stored hydraulic oil is transferred to the discharge amount control circuit. The regulator includes a recirculating accumulator and a regulator that controls the flow state of the hydraulic oil that joins the line pressure circuit from the discharge amount control circuit according to the amount of oil required in the hydraulic mechanism. An open position that opens the communication between the discharge amount control circuit and the line pressure circuit according to the amount of oil required in the hydraulic mechanism, and a closing position that closes the communication between the discharge amount control circuit and the line pressure circuit. An opening / closing rod that is moved to and from the opening / closing rod is provided, and an urging member that urges the opening / closing rod from the opening position to the closing position is provided, and the opening / closing rod controls the discharge amount from the accumulator. Due to the pressure generated when the hydraulic oil returns to the circuit, it is moved from the closed position to the open position against the urging force toward the closed position .

As a result, the regulator is operated according to the amount of oil required in the hydraulic mechanism, and the flow state of the hydraulic oil that joins the line pressure circuit from the discharge amount control circuit is controlled. Further, the opening / closing rod is urged toward the closed position by the urging member regardless of the hydraulic pressure of the line pressure circuit and the discharge amount control circuit. Further, since the opening / closing rod is urged toward the opening position by the pressure of the hydraulic oil flowing in the discharge amount control circuit, a dedicated member for opening the opening / closing rod becomes unnecessary.

Secondly , in the discharge amount control device according to the present invention described above, a pressurization circuit communicating with the regulator and the line pressure circuit is formed, and the pressure of the hydraulic oil flowing in the line pressure circuit is the pressurization. It is desirable that the opening / closing rod is applied to the opening / closing rod via a circuit and the opening / closing rod is urged from the open position to the closed position.

As a result, the opening / closing rod is urged toward the closed position by the pressure of the hydraulic oil flowing in the line pressure circuit.

Third , another discharge amount control device according to the present invention is between a suction port for sucking hydraulic oil, a discharge port for discharging hydraulic oil sucked from the suction port, and the suction port and the discharge port. A discharge amount control device for an oil pump having an intermediate port for discharging hydraulic oil sucked from the suction port, wherein the hydraulic oil discharged from the discharge port flows toward a hydraulic mechanism. The pressure circuit, the discharge amount control circuit that is communicated with the line pressure circuit and the hydraulic oil discharged from the intermediate port flows, and the hydraulic oil that flows in the discharge amount control circuit are stored and the stored hydraulic oil is stored. An accumulator that returns to the discharge amount control circuit and a regulator that controls the flow state of hydraulic oil that joins the line pressure circuit from the discharge amount control circuit according to the amount of oil required in the hydraulic mechanism. The regulator is provided with an open position for opening the communication between the discharge amount control circuit and the line pressure circuit, the discharge amount control circuit, and the line pressure circuit according to the amount of oil required in the hydraulic mechanism. An opening / closing rod that is moved between the closing position that closes the communication is provided, a pressure circuit that communicates with the regulator and the line pressure circuit is formed, and the pressure of the hydraulic oil flowing through the line pressure circuit is the pressure. The opening / closing rod is applied to the opening / closing rod via a pressurizing circuit, the opening / closing rod is urged from the opening position to the closing position, and the opening / closing rod recirculates hydraulic oil from the accumulator to the discharge amount control circuit. The area of the pressure receiving surface of the opening / closing rod that receives the pressure of the hydraulic oil that is moved from the closed position to the open position and flows in the line pressure circuit against the urging force toward the closed position due to the pressure generated from time to time. Is larger than the area of the pressure receiving surface of the opening / closing rod that receives the pressure generated when the hydraulic oil returns to the discharge amount control circuit .

As a result, the regulator is operated according to the amount of oil required in the hydraulic mechanism, and the flow state of the hydraulic oil that joins the line pressure circuit from the discharge amount control circuit is controlled. Further, the opening / closing rod is urged by the hydraulic pressure difference applied to the opening / closing rod.

Fourth , in the discharge amount control device according to the present invention described above, it is desirable to provide an urging member that urges the opening / closing rod from the open position to the closed position.

As a result, the opening / closing rod is urged toward the closed position by the urging member regardless of the hydraulic pressure of the line pressure circuit and the discharge amount control circuit.

Fifth , in the discharge amount control device according to the present invention described above, it is desirable that the pressurization circuit is provided with a control valve for controlling the pressure of the hydraulic oil applied to the on-off rod.

As a result, the pressure of the hydraulic oil on the on-off rod is changed according to the operating state of the control valve.

Sixth , in the discharge amount control device according to the present invention described above, it is desirable to provide a holding mechanism for holding the opening / closing rod in the closed position.

As a result, the opening / closing rod is held in the closed position by the holding mechanism when the hydraulic oil is stored in the accumulator.

Seventh , in the discharge amount control device according to the present invention described above, a check valve that regulates the flow of hydraulic oil from the accumulator to the intermediate port may be arranged in the discharge amount control circuit. desirable.

This regulates the flow of hydraulic oil toward the intermediate port when the hydraulic oil returns from the accumulator to the discharge rate control circuit.

According to the present invention, the regulator is operated according to the amount of oil required in the hydraulic mechanism, and the flow state of the hydraulic oil merging from the discharge amount control circuit to the line pressure circuit is controlled, so that the drive torque of the oil pump is controlled. It is possible to improve the reliability of operation in the hydraulic mechanism and ensure a smooth operating state while suppressing the increase in the pressure.

2 to 8 show an embodiment of the discharge amount control device of the present invention, and this figure is an exploded perspective view of an oil pump. It is a perspective view of a rotor unit. It is a schematic diagram which shows the state which the hydraulic oil is stored in the accumulator in the discharge amount control device. It is a schematic diagram which shows the state which the stored hydraulic oil is returned to a discharge amount control circuit in a discharge amount control device. In the first modification, it is a schematic diagram which shows the state which the hydraulic oil is stored in the accumulator. In the first modification, it is a schematic diagram which shows the state which the stored hydraulic oil is returned to a discharge amount control circuit. In the second modification, it is a schematic diagram which shows the state which the hydraulic oil is stored in the accumulator. In the second modification, it is a schematic diagram which shows the state which the stored hydraulic oil is returned to a discharge amount control circuit.

Hereinafter, embodiments for implementing the discharge amount control device of the present invention will be described with reference to the accompanying drawings.

The discharge amount control device 1 shown below is a device for controlling the discharge amount of the oil pump, and the trochoid type oil pump having a trochoid tooth type will be described below as an example of the oil pump.

In the following description, it is assumed that the direction of the rotation axis of the oil pump is the vertical direction and the vertical, front, rear, left, and right directions are shown. However, the directions shown below, up, down, front, back, left, and right are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

<Oil pump configuration>
The oil pump 1 has an outer rotor 2, an inner rotor 3, and a pump housing 4 (see FIGS. 1 and 2).

The outer rotor 2 has a columnar outer shape, and has an arrangement hole 2a that is vertically penetrated in a portion other than the outer peripheral portion. Internal teeth 2b, 2b, ... Are provided on the inner peripheral portion of the outer rotor 2.

The inner rotor 3 is rotatably arranged in the arrangement hole 2a of the outer rotor 2 and has a coupling hole 3a that is vertically penetrated in the central portion. External teeth 3b, 3b, ... Are provided on the outer peripheral portion of the inner rotor 3. The number of outer teeth 3b, 3b, ... Of the inner rotor 3 is one less than the number of internal teeth 2b, 2b, ... Of the outer rotor 2.

The shaft 5 is coupled to the inner rotor 3 in a state of being inserted into the coupling hole 3a. The shaft 5 is rotated in the axial direction by the driving force of a driving source (not shown).

The inner rotor 3 is arranged in the arrangement hole 2a in a state of being eccentric with respect to the outer rotor 2. The rotor unit 6 is composed of the outer rotor 2 and the inner rotor 3.

The pump housing 4 is configured by connecting the case 7 and the cover 8 at the top and bottom.

The case 7 is formed with a circular support recess 9 opened upward. In the case 7, a shaft insertion hole 10 is formed vertically through the bottom surface portion 7a forming the support recess 9. In the case 7, a suction port 11 and a discharge port 12 opened upward are formed on the bottom surface portion 7a, respectively. An intermediate port 13 is formed on the bottom surface portion 7a so as to be vertically penetrated between the suction port 11 and the discharge port 12. The suction port 11, the discharge port 12, and the intermediate port 13 are formed so as to be separated from each other in the circumferential direction.

The case 7 is formed with a suction hole 14 and a discharge hole 15 which are opened upward on opposite sides of the support recess 9. The suction hole 14 communicates with the suction port 11 inside the case 7, and the discharge hole 15 communicates with the discharge port 12 inside the case 7.

An insertion hole 16 is formed in a substantially central portion of the cover 8. The cover 8 is formed with a suction hole 17 and a discharge hole 18 which are vertically penetrated on opposite sides of the insertion hole 16, respectively.

The cover 8 is coupled to the case 7 from above in a state where the outer rotor 2 and the inner rotor 3 are arranged in the support recess 9. In a state where the cover 8 is coupled to the case 7, the shaft 5 is inserted into the shaft insertion hole 10 of the case 7, the coupling hole 3a of the inner rotor 3, and the insertion hole 16 of the cover 8 and fixed to the coupling hole 3a. Therefore, the shaft 5 is rotated integrally with the inner rotor 3 with respect to the pump housing 4. At this time, the inner teeth 2b, 2b, ... Of the outer rotor 2 and the outer teeth 3b, 3b, ... Of the inner rotor 3 are repeatedly meshed with and separated from each other, and the rotational force of the inner rotor 3 is applied to the outer rotor 2. Granted, the outer rotor 2 is rotated with respect to the pump housing 4 at a rotation speed different from that of the inner rotor 3.

In a state where the cover 8 is coupled to the case 7, the suction hole 17 of the cover 8 and the suction hole 14 of the case 7 are communicated vertically, and the suction hole 17 and the suction hole 14 form a suction path 19 for hydraulic oil. Further, in a state where the cover 8 is coupled to the case 7, the discharge hole 18 of the cover 8 and the discharge hole 15 of the case 7 are communicated vertically, and the discharge hole 18 and the discharge hole 15 form a hydraulic oil discharge path 20. The cover.

When the outer rotor 2 and the inner rotor 3 are arranged in the support recess 9, the case 7 and the cover 8 are coupled to each other by the outer rotor 2, the inner rotor 3, the bottom surface portion 7a of the case 7, and the lower surface of the cover 8. A plurality of spaces are formed, and each of these spaces is referred to as a pump chamber 21, 21, ....

<Operation of oil pump>
In the oil pump 1 configured as described above, the hydraulic oil is sucked from the suction passage 19, and the sucked hydraulic oil is flowed from the suction port 11 to the pump chambers 21, 21, .... At this time, the outer rotor 2 and the inner rotor 3 are rotated in the same direction at different rotation speeds, and the pump chambers 21, 21, ... Repeat the expansion and contraction of the volume. By repeatedly expanding and contracting the volumes of the pump chambers 21, 21, ..., The pressure of the hydraulic oil flowing into the pump chambers 21, 21, ... Is changed, and the hydraulic oil is discharged from the discharge port 12. The hydraulic oil is flown into the passage 20 and the flowed hydraulic oil is discharged from the discharge passage 20. At this time, a part of the hydraulic oil is also discharged from the intermediate port 13 toward the outside of the oil pump 1.

Since the intermediate port 13 is formed between the suction port 11 and the discharge port 12 in the oil pump 1 in this way, the pump chamber 21 is positioned corresponding to the intermediate port 13 when the inner rotor 3 and the outer rotor 2 rotate. By doing so, the pressure in the pump chamber 21 is reduced, and an increase in the driving torque for rotating the inner rotor 3 and the outer rotor 2 can be suppressed.

<Configuration of discharge amount control device>
Next, the configuration of the discharge amount control device 30 will be described (see FIG. 3).

The discharge amount control device 30 communicates with the suction circuit 31 that sucks the hydraulic oil into the oil pump 1, the line pressure circuit 32 through which the hydraulic oil discharged from the oil pump 1 flows, and the line pressure circuit 32, and the oil pump 1 A discharge amount control circuit 33 through which the hydraulic oil discharged from the oil is flowed, an accumulator 34 for storing the hydraulic oil, and a regulator that controls the flow state of the hydraulic oil flowing from the discharge amount control circuit 33 to the line pressure circuit 32. It is equipped with 35.

The suction circuit 31 is an oil passage that communicates with the suction passage 19 of the oil pump 1 and causes the hydraulic oil flowing from the oil tank 100 to flow toward the suction passage 19. A lubrication circuit 36 is communicated with the suction circuit 31, and a part of the hydraulic oil flowed from the oil tank 100 is directed toward the lubrication portion 200 of various gear mechanisms, rotation mechanisms, engine parts, etc., for example. It is flowed from the lubrication circuit 36.

A lubrication pressure adjusting valve 37 is connected to the lubrication circuit 36. The lubrication pressure adjusting valve 37 has a function of adjusting the pressure of the hydraulic oil flowing in the lubrication circuit 36 and controlling the amount of the hydraulic oil flowing toward the lubrication unit 200.

The line pressure circuit 32 is an oil passage that is communicated with the discharge passage 20 of the oil pump 1 and causes hydraulic oil discharged from the discharge passage 20 to flow toward, for example, a hydraulic mechanism 300 such as a clutch mechanism, a brake mechanism, or a transmission mechanism. be. A line pressure adjusting valve 38 is connected to the line pressure circuit 32. The line pressure adjusting valve 38 adjusts the pressure of the hydraulic oil flowing in the line pressure circuit 32, and is connected to the lubricating pressure adjusting valve 37 via the branch circuit 39.

One end of the discharge amount control circuit 33 communicates with the intermediate port 13 of the oil pump 1, and the other end communicates with the downstream of the line pressure adjusting valve 38 in the line pressure circuit 32.

The accumulator 34 has a cylindrical oil storage case 40 whose one end is communicated with a discharge amount control circuit 33, and an operating spring 41 arranged inside the oil storage case 40 and for discharging attached to one end of the operating spring 41. It has a rod 42 and. One end of the oil storage case 40 is formed as a communication port 40a in which one end is communicated with the discharge amount control circuit 33. The discharge rod 42 is urged toward the communication port 40a by the urging force of the actuating spring 41.

The regulator 35 is connected to the discharge amount control circuit 33 downstream of the accumulator 34 and has an arrangement case 43 and an opening / closing rod 44.

The inflow port 43a and the outflow port 43b are formed in the arrangement case 43. The hydraulic oil discharged from the intermediate port 13 and flowing into the discharge amount control circuit 33 flows into the arrangement case 43 from the inflow port 43a, and the hydraulic oil flowing in from the inflow port 43a flows from the outflow port 43b toward the line pressure circuit 32. Be flowed. An air flow hole 43c is formed in the arrangement case 43.

The opening / closing rod 44 is moved between an open position where the outlet 43b is opened and a closed position where the outlet 43b is closed. At this time, the air flow hole 43c causes the air to flow out or flow into the arrangement case 43, and the opening / closing rod 44 is smoothly moved. The opening / closing rod 44 has a large diameter portion 44a and a small diameter portion 44b that are continuous in the moving direction, and the large diameter portion 44a is made larger than the diameter of the small diameter portion 44b. Therefore, the area of the pressure receiving surface of the large diameter portion 44a that receives the hydraulic pressure is larger than the area of the pressure receiving surface of the small diameter portion 44b that receives the hydraulic pressure.

One end of the pressurization circuit 45 is communicated with the arrangement case 43. The other end of the pressurization circuit 45 is communicated downstream from the communication portion with the discharge amount control circuit 33 in the line pressure circuit 32. A part of the hydraulic oil flowing in the line pressure circuit 32 flows into the pressurization circuit 45, and the hydraulic pressure of the hydraulic oil flowing into the pressurization circuit 45 is applied to the large diameter portion 44a to open the opening / closing rod 44. Is urged in the direction of being moved from to the closed position.

The opening / closing rod 44 has a large diameter portion 44a located on the pressurization circuit 45 side and a small diameter portion 44b located on the discharge amount control circuit 33 side.

A control valve 46 is connected to the pressurization circuit 45. The pressure of the hydraulic oil in the pressurization circuit 45 is controlled by the operation of the control valve 46, and the urging force of the hydraulic oil in the pressurization circuit 45 with respect to the on-off rod 44 is changed. An operation signal (on / off signal) is sent to the control valve 46 from a control circuit (not shown).

A check valve 47 is arranged between the intermediate port 13 and the accumulator 34 in the discharge amount control circuit 33. The check valve 47 has a spring member 48 and an opening / closing body 49, and the opening / closing body 49 is urged in a direction of regulating the flow of hydraulic oil discharged from the intermediate port 13 in the discharge amount control circuit 33. The urging force (spring force) of the spring member 48 is larger than the urging force (spring force) of the operating spring 41 in the accumulator 34. The opening / closing body 49 is formed, for example, in a spherical shape.

<Operation of discharge amount control device>
Next, the operation of the discharge amount control device 1 will be described (see FIGS. 3 and 4).

The hydraulic oil that has flowed from the oil tank 100 to the suction circuit 31 is flown toward the oil pump 1 except for a part thereof, and a part of the hydraulic oil is flown to the lubrication circuit 36.

The pressure of the hydraulic oil flowing in the lubrication circuit 36 is adjusted by the lubrication pressure adjusting valve 37, and the hydraulic oil flows toward the lubricating portion 200.

The hydraulic oil that has flowed toward the oil pump 1 is sucked into the oil pump 1 from the suction passage 19, and is flown from the discharge passage 20 to the line pressure circuit 32 except for a part. The pressure of the hydraulic oil flowing in the line pressure circuit 32 is adjusted by the line pressure adjusting valve 38, and the hydraulic oil flows toward the hydraulic mechanism 300 except for a part. A part of the hydraulic oil flowing in the line pressure circuit 32 is flowed from the line pressure adjusting valve 38 to the branch circuit 39, and is made flowable toward the lubricating portion 200 via the lubricating pressure adjusting valve 37.

A part of the hydraulic oil sucked into the oil pump 1 from the suction path 19 flows from the intermediate port 13 to the discharge amount control circuit 33.

At this time, when the rotor unit 6 is in a high rotation state, the hydraulic pressure of the hydraulic oil flowing from the intermediate port 13 to the discharge amount control circuit 33 is increased, and the amount of hydraulic oil supplied to the hydraulic mechanism 300 is increased. It is in a state that is sufficient. In such a high rotation state, since the hydraulic pressure in the discharge amount control circuit 33 is larger than the urging force of the spring member 48, the check valve 47 is opened by the hydraulic pressure and the hydraulic oil discharged from the intermediate port 13 is checked back. It flows downstream from the valve 47 (see FIG. 3).

Further, in the high rotation state, an on signal is sent from the control circuit to the control valve 46 to open the control valve 46, and the hydraulic pressure for the large diameter portion 44a of the on-off rod 44 is made larger than the hydraulic pressure for the small diameter portion 44b. The opening / closing rod 44 of the regulator 35 is held in the closed position. Therefore, the hydraulic oil discharged from the intermediate port 13 is stored in the oil storage case 40 of the accumulator 34, and the discharge rod 42 is moved to the inner side of the oil storage case 40 against the urging force of the operating spring 41.

On the other hand, when the rotor unit 6 is in a low rotation state, the hydraulic pressure of the hydraulic oil flowing from the intermediate port 13 to the discharge amount control circuit 33 is reduced, and the amount of hydraulic oil supplied to the hydraulic mechanism 300 is reduced. It may be inadequate. Such a state is, for example, a case where a sudden shifting operation is performed in a vehicle when the clutch is engaged or in a CVT (continuously variable transmission). In the low rotation state, the hydraulic pressure in the discharge amount control circuit 33 is smaller than the urging force of the spring member 48, so that the check valve 47 is blocked by the urging force of the spring member 48 and the accumulator of the hydraulic oil in the discharge amount control circuit 33. The flow from the accumulator 34 toward the oil pump 1 side is prevented (see FIG. 4).

Further, in the low rotation state, an off signal is sent from the control circuit to the control valve 46 to close the control valve 46, and the hydraulic pressure for the large diameter portion 44a of the on-off rod 44 becomes small. Therefore, the operating spring 41 is extended and the discharge rod 42 is moved in a direction approaching the communication port 40a, and the hydraulic oil stored in the oil storage case 40 of the accumulator 34 is returned to the discharge amount control circuit 33. The hydraulic oil returned to the discharge amount control circuit 33 is flowed toward the line pressure circuit 32 because the check valve 47 is closed, and the on-off rod 44 of the regulator 35 is flown toward the line pressure circuit 32. It is moved toward the open position by the hydraulic pressure of the hydraulic oil. Since the opening / closing rod 44 is moved toward the open position, the hydraulic oil that has flowed toward the line pressure circuit 32 joins the line pressure circuit 32 from the discharge amount control circuit 33 and flows toward the hydraulic mechanism 300. ..

Therefore, both the hydraulic oil discharged from the discharge port 12 to the hydraulic mechanism 300 and flowing into the line pressure circuit 32 and the hydraulic oil returned from the oil storage case 40 to the discharge amount control circuit 33 and merged with the line pressure circuit 32. The state in which the hydraulic oil is supplied and the amount of the hydraulic oil supplied to the hydraulic mechanism 300 is insufficient is resolved. When the hydraulic oil is returned from the oil storage case 40 to the discharge amount control circuit 33 and merges with the line pressure circuit 32, the hydraulic pressure of the discharge amount control circuit 33 becomes small, and an on signal is sent from the control circuit to the control valve 46. The opening / closing rod 44 of the regulator 35 is held in the closed position again.

<Summary>
As described above, in the discharge amount control device 30, the accumulator 34 that stores the hydraulic oil that flows in the discharge amount control circuit 33 and returns the stored hydraulic oil to the discharge amount control circuit 33, and the hydraulic mechanism. A regulator 35 is provided to control the flow state of the hydraulic oil merged from the discharge amount control circuit 33 to the line pressure circuit 32 according to the amount of oil required in the 300.

Therefore, the regulator 35 is operated according to the amount of oil required in the hydraulic mechanism 300, and the flow state of the hydraulic oil merged from the discharge amount control circuit 33 to the line pressure circuit 32 is controlled. Therefore, for example, the clutch is engaged. A sufficient amount of oil is supplied to the hydraulic mechanism 300 in the event of a sudden shift operation or the like, and after suppressing an increase in the drive torque of the oil pump 1, the reliability of the operation of the hydraulic mechanism 300 is improved and a smooth operation state is achieved. Can be secured.

Further, since the opening / closing rod 44 is configured to have a different pressure receiving surface area and is urged from the open position to the closed position by hydraulic pressure, the structure of the opening / closing rod 44 is simple, and the structure is simplified. After making a plan, it is possible to ensure a smooth operating state of the discharge amount control device 30.

Further, since the pressurization circuit 45 is provided with a control valve 46 for controlling the pressure of the hydraulic oil applied to the on-off rod 44, the pressure of the hydraulic oil on the on-off rod 44 is increased by the control valve 46 according to the operating state. It is changed, and a smooth operating state in the discharge amount control device 30 can be ensured.

Furthermore, a check valve 47 that regulates the flow of hydraulic oil from the accumulator 34 to the intermediate port 13 is arranged in the discharge amount control circuit 33.

Therefore, when the hydraulic oil is returned from the accumulator 34 to the discharge amount control circuit 33, the flow of the hydraulic oil toward the intermediate port 13 is restricted. Therefore, when the hydraulic oil is returned from the accumulator 34 to the discharge amount control circuit 33, the hydraulic oil is returned. It is possible to prevent the backflow of the oil pressure mechanism 300 and surely increase the amount of flow to the hydraulic mechanism 300.

<Modification example>
Hereinafter, each modification of the accumulator 34 and the regulator 35 will be described (see FIGS. 5 to 8).

The first modification is an example in which the holding mechanism 50 for holding the discharge rod 42 of the accumulator 34 is provided and the control valve 46 is not provided (see FIGS. 5 and 6).

The holding mechanism 50 is a mechanism that holds the discharging rod 42 at a predetermined position against the urging force of the operating spring 41.

One end of the pressurization circuit 45 communicated with the line pressure circuit 32 is communicated with the arrangement case 43 of the regulator 35. Since the control valve 46 is not connected to the pressurization circuit 45, hydraulic oil is constantly flowing into the pressurization circuit 45 from the line pressure circuit 32. Therefore, the hydraulic oil that has flowed into the pressurization circuit 45 is always in a state where the hydraulic oil that has flowed into the pressurization circuit 45 can flow into the arrangement case 43, and the opening / closing rod 44 is hydraulically urged from the open position to the closed position.

In the first modification, when the rotor unit 6 is in a high rotation state, the hydraulic pressure in the discharge amount control circuit 33 is large, so that the check valve 47 is opened by the hydraulic pressure and the hydraulic oil discharged from the intermediate port 13 is discharged. It is flowed to the quantity control circuit 33 (see FIG. 5).

At this time, the opening / closing rod 44 urged by hydraulic pressure is held in the closed position, and the hydraulic oil discharged from the intermediate port 13 is stored in the oil storage case 40 of the accumulator 34 to urge the operating spring 41. On the contrary, the discharge rod 42 is moved to the back side of the oil storage case 40.

On the other hand, when the rotor unit 6 is set to the low rotation state, the hydraulic pressure in the discharge amount control circuit 33 becomes small, the check valve 47 is closed, and the hydraulic oil accumulator 34 moves to the oil pump 1 side in the discharge amount control circuit 33. The flow toward is prevented (see FIG. 6).

At this time, the holding of the discharge rod 42 by the holding mechanism 50 is released, the discharge rod 42 is moved in a direction approaching the communication port 40a by the urging force of the operating spring 41, and is stored in the oil storage case 40 of the accumulator 34. The hydraulic oil is returned to the discharge amount control circuit 33. The hydraulic oil that has flowed back to the discharge amount control circuit 33 flows toward the line pressure circuit 32 because the check valve 47 is closed. When the hydraulic oil is flowed from the accumulator 34 toward the line pressure circuit 32, the pressure of the hydraulic oil flowing toward the line pressure circuit 32 is applied to the opening / closing rod 44 of the regulator 35, and the opening / closing rod 44 is closed. Moved from to the open position. Therefore, the hydraulic oil recirculated from the accumulator 34 to the discharge amount control circuit 33 joins the line pressure circuit 32 from the discharge amount control circuit 33 and flows toward the hydraulic mechanism 300.

When the amount of hydraulic oil flowing from the accumulator 34 toward the line pressure circuit 32 is reduced, the pressure of the hydraulic oil flowing toward the line pressure circuit 32 with respect to the opening / closing rod 44 is reduced, and the pressurization circuit 45 is used. The opening / closing rod 44 is moved toward the closed position by the hydraulic pressure applied to the large diameter portion 44a of the opening / closing rod 44. Therefore, the discharge amount control circuit 33 is closed by the opening / closing rod 44, and the flow of the hydraulic oil from the discharge amount control circuit 33 to the line pressure circuit 32 is stopped.

By stopping the flow of hydraulic oil from the discharge amount control circuit 33 to the line pressure circuit 32, the check valve 47 is opened and the accumulator 34 is stored when the rotor unit 6 is put into a high rotation state. The hydraulic oil discharged from the intermediate port 13 is stored in the oil case 40, the discharge rod 42 is moved to the back side of the oil storage case 40 against the urging force of the operating spring 41, and the discharge rod 42 is designated. It is held again by the holding mechanism 50 at the position of.

As described above, in the first modification, the pressure of the hydraulic oil flowing in the line pressure circuit 32 is applied to the opening / closing rod 44 via the pressurization circuit 45, and the opening / closing rod 44 is directed from the open position to the closed position. Is being urged.

Therefore, since the opening / closing rod 44 is urged toward the closed position by the pressure of the hydraulic oil flowing in the line pressure circuit 32, a member for urging the opening / closing rod 44 to hold it in the closed position becomes unnecessary. It is possible to reduce the manufacturing cost of the discharge amount control device 30 by simplifying the above.

Further, the opening / closing rod 44 is moved from the closed position to the open position against the urging force toward the closed position due to the pressure generated when the hydraulic oil is returned from the accumulator 34 to the discharge amount control circuit 33.

Therefore, since the opening / closing rod 44 is urged toward the opening position by the pressure of the hydraulic oil flowing in the discharge amount control circuit 33, a dedicated member for opening the opening / closing rod 44 becomes unnecessary, and the structure is simplified. It is possible to reduce the manufacturing cost of the discharge amount control device 30 by the change.

The second modification is an example in which the urging member 51 for urging the on-off rod 44X and the holding mechanism 52 for holding the on-off rod 44X are provided, and the control valve 46 is not provided (FIGS. 7 and 8). reference).

In the second modification, the regulator 35X is provided in place of the regulator 35, and the regulator 35X has an arrangement case 43, an opening / closing rod 44X, and an urging member 51.

The opening / closing rod 44X has the same area of the pressure receiving surfaces on both sides in the moving direction, and is formed, for example, in a round shaft shape.

In the regulator 35X, the opening / closing rod 44X is urged from the open position to the closed position by the urging member 51. The opening / closing rod 44X is held by the holding mechanism 52 at the closed position.

In the second modification, when the rotor unit 6 is in a high rotation state, the hydraulic pressure in the discharge amount control circuit 33 is large, so that the check valve 47 is opened by the hydraulic pressure and the hydraulic oil discharged from the intermediate port 13 is discharged. It is flowed to the quantity control circuit 33 (see FIG. 7).

At this time, the opening / closing rod 44X is held in the closed position by the holding mechanism 52, and the hydraulic oil discharged from the intermediate port 13 is stored in the oil storage case 40 of the accumulator 34 and discharged against the urging force of the working spring 41. The rod 42 is moved to the back side of the oil storage case 40.

On the other hand, when the rotor unit 6 is set to the low rotation state, the hydraulic pressure in the discharge amount control circuit 33 becomes small, the check valve 47 is closed, and the hydraulic oil accumulator 34 moves to the oil pump 1 side in the discharge amount control circuit 33. The flow toward is prevented (see FIG. 8).

At this time, the holding of the opening / closing rod 44X with respect to the opening / closing rod 44X by the holding mechanism 52 is released, the opening / closing rod 44X is made movable toward the opening position, and the discharge rod 42 is brought into the communication port 40a by the urging force of the actuating spring 41. It is moved in the approaching direction, and the hydraulic oil stored in the oil storage case 40 of the accumulator 34 is returned to the discharge amount control circuit 33. The hydraulic oil that has flowed back to the discharge amount control circuit 33 flows toward the line pressure circuit 32 because the check valve 47 is closed. When the hydraulic oil is flowed from the accumulator 34 toward the line pressure circuit 32, the opening / closing rod 44X whose holding at the closed position is released by the pressure of the hydraulic oil in the discharge amount control circuit 33 is attached to the urging member 51. It is moved from the closed position to the open position against the force. When the opening / closing rod 44X is moved toward the open position, the hydraulic oil returned from the accumulator 34 to the discharge amount control circuit 33 is merged from the discharge amount control circuit 33 into the line pressure circuit 32 and directed toward the hydraulic mechanism 300. Is flowed.

When the amount of hydraulic oil flowing from the accumulator 34 toward the line pressure circuit 32 is reduced, the pressure of the hydraulic oil flowing toward the line pressure circuit 32 with respect to the opening / closing rod 44X is reduced, and the urging member 51 is used. The opening / closing rod 44X is moved toward the closed position by the urging force of. Therefore, the discharge amount control circuit 33 is closed by the opening / closing rod 44X, and the flow of hydraulic oil from the discharge amount control circuit 33 to the line pressure circuit 32 is stopped. The opening / closing rod 44X is moved to the closed position and is held in the closed position again by the holding mechanism 52.

By stopping the flow of hydraulic oil from the discharge amount control circuit 33 to the line pressure circuit 32, the check valve 47 is opened and the accumulator 34 is stored when the rotor unit 6 is put into a high rotation state. The hydraulic oil discharged from the intermediate port 13 is stored in the oil case 40, and the discharge rod 42 is moved to the back side of the oil storage case 40 against the urging force of the operating spring 41.

As described above, in the second modification, the urging member 51 for urging the opening / closing rod 44X from the open position to the closed position is provided, and the opening / closing rod 44X is the discharge amount control circuit 33 from the accumulator 34. The pressure (flow pressure) generated when the hydraulic oil recirculates to the urging member 51 is moved from the closed position to the open position against the urging force of the urging member 51.

Therefore, since the opening / closing rod 44X is moved toward the open position by the pressure of the hydraulic oil, a dedicated member for moving the opening / closing rod 44X is not required, and the manufacturing cost of the discharge amount control device 1 is reduced by simplifying the structure. Can be planned.

Further, by providing the urging member 51 that urges the opening / closing rod 44X from the open position to the closed position, the opening / closing rod 44X is closed by the urging member 51 when the hydraulic pressure of the discharge amount control circuit 33 drops. It is moved to the position, and the opening / closing rod 44X can be moved to the closed position to surely store the hydraulic oil in the accumulator 34.

Further, since the holding mechanism 52 for holding the opening / closing rod 44X in the closed position is provided, the opening / closing rod 44X is held in the closed position by the holding mechanism 52 when the hydraulic oil is stored in the accumulator 34, and the discharge amount control device 30 It is possible to improve the reliability of the operation in.

In addition, although the example in which the urging member 41 is provided in the configuration in which the opening / closing rod 44 is used is shown above, the configuration in which the opening / closing rod 44 having the large diameter portion 44a and the small diameter portion 44b described above is also used. , It is also possible to use the urging member 51. Further, in the first modification and the second modification described above, it is possible to configure the holding mechanisms 50 and 52 not to be provided.

1 ... oil pump, 11 ... suction port, 12 ... discharge port, 13 ... intermediate port, 30 ... discharge amount control device, 32 ... line pressure circuit, 33 ... discharge amount control circuit, 34 ... accumulator, 35 ... regulator, 44 ... opening / closing rod, 45 ... pressurization circuit, 46 ... control valve, 47 ... check valve, 300 ... hydraulic mechanism, 44X ... opening / closing rod, 51 ... urging member

Claims (7)

An intermediate between a suction port for sucking hydraulic oil, a discharge port for discharging hydraulic oil sucked from the suction port, and a hydraulic oil formed between the suction port and the discharge port to discharge the hydraulic oil sucked from the suction port. A discharge amount control device for an oil pump having a port.
A line pressure circuit in which hydraulic oil discharged from the discharge port flows toward the hydraulic mechanism, and
A discharge amount control circuit that communicates with the line pressure circuit and allows hydraulic oil discharged from the intermediate port to flow.
An accumulator that stores the hydraulic oil that flows in the discharge amount control circuit and returns the stored hydraulic oil to the discharge amount control circuit.
A regulator for controlling the flow state of the hydraulic oil merged from the discharge amount control circuit to the line pressure circuit according to the amount of oil required in the hydraulic mechanism is provided .
The regulator has an open position that opens the communication between the discharge amount control circuit and the line pressure circuit according to the amount of oil required in the hydraulic mechanism, and communication between the discharge amount control circuit and the line pressure circuit. An opening / closing rod is provided to move between the closing position and the closing position.
An urging member for urging the opening / closing rod from the open position to the closed position is provided.
The opening / closing rod is moved from the closed position to the open position against the urging force toward the closed position due to the pressure generated when the hydraulic oil is returned from the accumulator to the discharge amount control circuit.
Discharge amount control device. A pressurization circuit that communicates with the regulator and the line pressure circuit is formed.
The pressure of the hydraulic oil flowing in the line pressure circuit is applied to the opening / closing rod via the pressurization circuit, and the opening / closing rod is urged from the open position to the closed position.
The discharge amount control device according to claim 1 . An intermediate between a suction port for sucking hydraulic oil, a discharge port for discharging hydraulic oil sucked from the suction port, and a hydraulic oil formed between the suction port and the discharge port to discharge the hydraulic oil sucked from the suction port. A discharge amount control device for an oil pump having a port.
A line pressure circuit in which hydraulic oil discharged from the discharge port flows toward the hydraulic mechanism, and
A discharge amount control circuit that communicates with the line pressure circuit and allows hydraulic oil discharged from the intermediate port to flow.
An accumulator that stores the hydraulic oil that flows in the discharge amount control circuit and returns the stored hydraulic oil to the discharge amount control circuit.
A regulator for controlling the flow state of the hydraulic oil merged from the discharge amount control circuit to the line pressure circuit according to the amount of oil required in the hydraulic mechanism is provided.
The regulator has an open position that opens the communication between the discharge amount control circuit and the line pressure circuit according to the amount of oil required in the hydraulic mechanism, and communication between the discharge amount control circuit and the line pressure circuit. An opening / closing rod is provided to move between the closing position and the closing position.
A pressurization circuit that communicates with the regulator and the line pressure circuit is formed.
The pressure of the hydraulic oil flowing in the line pressure circuit is applied to the opening / closing rod via the pressurization circuit, and the opening / closing rod is urged from the open position to the closed position.
The opening / closing rod is moved from the closed position to the open position against the urging force toward the closed position by the pressure generated when the hydraulic oil is returned from the accumulator to the discharge amount control circuit.
The area of the pressure receiving surface of the opening / closing rod that receives the pressure of the hydraulic oil flowing in the line pressure circuit is larger than the area of the pressure receiving surface of the opening / closing rod that receives the pressure generated when the hydraulic oil returns to the discharge amount control circuit. Discharge amount control device. An urging member is provided to urge the opening / closing rod from the open position to the closed position.
The discharge amount control device according to claim 3 . The pressurization circuit is provided with a control valve that controls the pressure of the hydraulic oil applied to the on-off rod.
The discharge amount control device according to any one of claims 2 to 4 . A holding mechanism for holding the opening / closing rod in the closed position is provided.
The discharge amount control device according to any one of claims 1 to 5 . A check valve that regulates the flow of hydraulic oil from the accumulator to the intermediate port is arranged in the discharge amount control circuit.
The discharge amount control device according to any one of claims 1 to 6 .

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