JP2017223140A - Oil supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an oil supply device that can supply oil to a lubrication flow passage and a control flow passage and reducing a load on a hydraulic pump.SOLUTION: An oil pump 20 is formed by dividing a pressurization region pressurized at the time of rotation of a pump rotor to form a first discharge part 26 and a second discharge part 27. An oil supply device is formed with a lubrication flow passage 2 for sending oil from the first discharge part 26 to an object 5 to be lubricated and a control flow passage 3 for sending oil from the second discharge part 27 to an object 6 to be controlled. The oil supply device comprises a control valve 30 that supplies all amount of the oil from the first discharge part 26 to the lubrication flow passage 2 when the oil pressure in the control flow passage 3 is equal to or larger than a set value, and supplies a part of the oil from the first discharge part 26 to the control flow passage 3 when the oil pressure in the control flow passage 3 is smaller than the set value.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an oil supply apparatus that supplies oil supplied from an oil pump to a lubrication flow path that supplies oil to a bearing and the like, and a control flow path that supplies a hydraulic clutch or the like.

  As an oil supply configured as described above, Patent Document 1 includes an inner rotor and an outer rotor, a single suction port and a single discharge port, and a lubricating flow path (second discharge port) with respect to the discharge port. The technique which connected the path | route) and the control flow path (1st discharge path) is shown.

  In Patent Document 1, the control flow path and the lubrication flow path communicate with a single discharge port, and each flow path is provided with a check valve in order to prevent backflow when the downstream side becomes high pressure. Furthermore, the control flow path is provided with an orifice for increasing the pressure.

  In Patent Document 2, an oil pump is configured including an inner rotor and an outer rotor, the oil pump includes a single suction port communicating with the negative pressure region, and the pressurization region is divided into two parts. There is shown a technique that includes one discharge port and a second discharge port and supplies oil from these discharge ports separately to a lubrication flow path and a control flow path.

  In the technique of this patent document 2, a pressure regulating valve is provided in a bypass flow path connecting a lubricating flow path and a control flow path, and this pressure regulating valve is opened when the pressure in the control flow path increases. The control channel oil is configured to be supplied to the lubrication channel.

Japanese Patent Laid-Open No. 2015-59562 JP 2013-100736 A

  In a vehicle that runs with the driving force of the engine, oil is supplied to the parts that require lubricating oil, such as parts of the engine and the transmission case, via a lubricating flow path, and the control flow path to the hydraulic clutch transmission of the transmission case, etc. It has a hydraulic pump that supplies oil through

  Considering the hydraulic pump used in this way, a configuration in which a lubrication flow path and a control flow path communicate with one discharge port as shown in Patent Document 1, a check valve or the like without improving the hydraulic pump. As a result, oil can be supplied to the lubrication channel and the control channel.

  However, in the configuration of Patent Document 1, not only the number of parts increases but also an orifice is provided, so that a high pressure always acts on the hydraulic pump, resulting in an increase in the load on the hydraulic pump. .

  Further, as shown in Patent Document 2, in a hydraulic pump comprising two discharge ports, not only can the number of parts be reduced, but the oil can be reduced without influencing the pressure drop between the respective discharge ports. The good aspect which can supply is revealed.

  However, in the configuration including the pressure regulating valve as shown in Patent Document 2, when the pressure in the control flow path rises, the pressure regulating valve operates in the same manner as the relief valve, and a part of the oil in the control flow path However, oil cannot be supplied from the lubrication channel to the control channel. For this reason, it is necessary to supply an excessive amount of oil in order to ensure the necessary oil pressure even at the rotation speed at which the control oil pressure is minimized, leaving room for reducing the load on the hydraulic pump.

  For these reasons, there is a need for an oil supply device that can supply oil to the lubrication flow path and the control flow path and reduce the load acting on the hydraulic pump.

A feature of the present invention is that a pump rotor is rotatably accommodated in a housing, a suction portion is formed in the housing in a negative pressure region that becomes negative pressure as the pump rotor rotates, and pressure is increased as the pump rotor rotates. An oil pump is configured by forming the first discharge portion and the second discharge portion in the housing by dividing the pressurized region into at least two,
A lubrication flow path for sending oil from the first discharge section to a lubrication target;
A control flow path for sending oil from the second discharge part to a control target;
When the oil pressure in the control channel is greater than or equal to a set value, the entire amount of oil from the first discharge part is supplied to the lubrication channel, and when the oil pressure in the control channel is less than the set value And a control valve that supplies part of the oil from the first discharge section to the control flow path.

According to this configuration, when the oil pressure in the control flow path is equal to or higher than the set value in the situation where the pump rotor is driven to rotate, the entire amount of oil from the first discharge unit is supplied from the lubrication flow path to the lubrication target, Oil from two discharge parts is supplied to a controlled object from a control channel. Further, when the oil pressure in the control flow path is less than the set value, the control valve supplies a part of the oil from the first discharge unit to the control flow path. The oil pressure can be increased.
In the oil supply device, it is also conceivable to set the oil pressure in the control flow path as high as possible using an orifice or the like in order to perform a quick and reliable operation of the controlled object. However, when the oil pressure in the control flow path is set high, the driving load of the pump rotor increases, so that the energy consumption of the actuator that drives the oil pump increases. In contrast, when the oil pressure in the control flow path is less than the set value, the oil in the lubrication flow path is merged and supplied to the control flow path without increasing the load acting on the pump rotor. It is also possible to maintain the oil pressure in the flow path at a required pressure.
Moreover, in this structure, since the pressurization area | region of the housing which accommodates a pump rotor is divided | segmented and the 1st discharge part and the 2nd discharge part are formed, the pressure of these discharge parts may mutually influence. In addition, there is no need to provide valves for controlling the pressure of these discharge portions.
Therefore, an oil supply apparatus is configured that can supply oil to the lubrication flow path and the control flow path and reduce the load acting on the hydraulic pump.

The present invention provides a lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and supplies a part of the oil from the first discharge section to the control flow path. A spool that can be operated to a diversion position for supplying the remaining oil to the lubricating flow path;
A biasing member that biases the spool toward the diversion position;
And a pressure chamber that causes the oil pressure of the control flow path to act on the spool in a direction against the urging force of the urging member.

  According to this, when the pressure in the control flow path decreases, the pressure in the pressure chamber decreases, and the spool reaches the diversion position by the urging force of the urging member, so that a part of the oil from the first discharge portion is controlled to flow. It becomes possible to supply to the road. In this configuration, since the spool is directly operated by the oil pressure of the control flow path, for example, the configuration is simpler and more reliable than that using an electromagnetic solenoid. Further, in this configuration, for example, a spool is accommodated so as to be movable with respect to the valve housing, a biasing member is provided, a pressure chamber is formed, and a pilot pressure channel is formed between the pressure chamber and the control channel. The control valve can be configured with such a configuration, the number of parts is not increased, and the structure is not complicated.

The present invention provides a lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and supplies a part of the oil from the first discharge section to the control flow path. A spool that can be operated to a diversion position for supplying the remaining oil to the lubricating flow path;
A biasing member that biases the spool toward the diversion position;
A pressure chamber acting on the spool in a direction against the biasing force of the biasing member;
A pilot pressure channel that causes the pressure of the first discharge part or the second discharge part to act on the pressure chamber via an electromagnetic valve;
A pressure sensor for detecting the pressure of the control flow path, and when the pressure detected by the pressure sensor is equal to or higher than the set value, the electromagnetic valve is opened to apply the pressure of the control flow path to the pressure chamber. And a controller that closes the solenoid valve when the pressure detected by the pressure sensor is less than the set value.

According to this, when the pressure of the control flow path detected by the pressure sensor is equal to or higher than the set value, the control unit opens the electromagnetic valve and applies the pressure of the pilot pressure flow path to the pressure chamber. The lubrication position is maintained, and the entire amount of oil from the first discharge part can be supplied to the lubrication flow path. In addition, when the pressure of the control flow path detected by the pressure sensor is less than the set value, the controller controls the solenoid valve in the closing direction, thereby reducing the pressure in the pressure chamber and the biasing force of the biasing member. Thus, the spool can be operated to the diversion position to supply the oil from the first discharge portion to the control flow path.
In particular, since this configuration operates the spool using the force relationship between the spring biasing force and the oil pressure, for example, a large electromagnetic solenoid compared to a configuration in which the spool is operated by the force of the electromagnetic solenoid. There is no need to use. Further, since the position of the spool can be set by electrical control, the set value can be easily finely adjusted.

The present invention provides a lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and supplies a part of the oil from the first discharge section to the control flow path. A spool that can be operated to a diversion position for supplying the remaining oil to the lubricating flow path;
A biasing member that biases the spool toward the diversion position;
A pressure chamber that causes the oil pressure of the control flow path to act on the spool in a direction against the biasing force of the biasing member;
A relief port may be provided for discharging oil in the pressure chamber when the spool reaches the lubrication position due to the pressure of oil supplied to the pressure chamber.

  According to this, when the spool reaches the lubrication position due to the pressure of the oil supplied to the pressure chamber, the oil in the pressure chamber is discharged from the relief port. Even so, the spool can be kept in the lubrication position. Furthermore, damage to the control circuit and oil leakage from the seal portion can be suppressed.

According to the present invention, the valve housing that houses the spool includes a first introduction port to which oil from the first discharge portion is supplied, a second introduction port, and a third introduction port, and the lubricating flow path A first delivery port for delivering oil to the second delivery port, a second delivery port, and a third delivery port for delivering oil to the control flow path,
When the spool is in the lubrication position, supplying oil from the second introduction port to the second delivery port while blocking the flow of oil to the first delivery port and the third delivery port, When the spool is in the diversion position, the oil from the first introduction port is supplied to the first delivery port while blocking the flow of oil to the second delivery port, and the third introduction port The spool is configured to supply oil from the third delivery port;
You may provide the flow volume restriction | limiting part which acts resistance on the flow of the oil which flows into the said 1st delivery port from the said 1st introduction port.

  According to this, when the spool is set to the diversion position, the oil supplied from the first discharge portion flows from the first introduction port to the first delivery port, and at the same time from the third introduction port to the third delivery port. Flowing. Further, in this branching position, the oil pressure flowing from the first introduction port to the first delivery port is made to act as a resistance from the flow rate limiting unit, so that the oil pressure upstream (the first discharge unit side) from the flow rate limiting unit is increased. It becomes possible to make it higher than the oil pressure in the lubrication flow path. As a result, even when part of the oil from the first discharge section is supplied to the control flow path, the oil pressure in the control flow path is not reduced.

It is sectional drawing of an oil supply apparatus. It is sectional drawing of an inner rotor and an outer rotor. It is a bottom view of a channel plate. It is sectional drawing of a pump housing. It is a hydraulic circuit diagram of an oil supply apparatus. It is a figure which shows the flow of the oil in the state which has a spool in a lubrication position. It is a figure which shows the flow of the oil in the state which has a spool in a branch position. It is a chart which shows the relationship between the amount of oil which flows at the time of low temperature, and a pressure. It is a chart which shows the relationship between the amount of oil which flows when temperature rises, and a pressure. It is a hydraulic circuit diagram of the oil supply apparatus of another embodiment (a). It is a hydraulic circuit diagram with a spool in a diversion position in another embodiment (a). It is a hydraulic-circuit figure of the oil supply apparatus of another embodiment (b). It is a hydraulic circuit diagram with a spool in a diversion position in another embodiment (b).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration]
As shown in FIG. 1, an oil supply device 100 is configured including an oil pump 20 driven by an electric motor 10 and a control valve 30.

  That is, the oil supply device 100 is configured by connecting the flow path plate 22 to one surface of the block-shaped pump housing 21, supporting the electric motor 10 on the other surface, and housing the control valve 30 in the pump housing 21. Has been. The pump housing 21 is also used as a valve housing for the control valve 30.

  This oil supply device 100 is assumed to be provided in a vehicle that can travel with the driving force of a traveling motor in a state where the engine is stopped, such as a hybrid type or a plug-in hybrid type. In this type of vehicle, since oil supply is required even in a situation where the engine is stopped, the oil pump 20 is driven by the electric motor 10 instead of the configuration in which the oil pump 20 is driven by the engine.

  That is, as shown in FIGS. 1 and 3 to 5, when the oil pump 20 is driven by driving the electric motor 10, the oil in the engine oil pan is sucked and sucked through the suction flow path 1. The basic oil supply / discharge mode is set so that oil is supplied from the lubrication flow path 2 to the lubrication target 5 and from the control flow path 3 to the control target 6.

  The lubrication target 5 is a transmission bearing part, a gear inner surface, and the like, and the control target 6 is a transmission case incorporating a hydraulic clutch transmission mechanism.

  In particular, the oil supply device 100 is capable of supplying oil by driving the electric motor 10, but even when the amount of oil leakage increases as the temperature of the controlled object 6 increases, a necessary amount of oil is supplied to the controlled object 6. It enables supply.

  That is, when the amount of oil leakage increases and the oil pressure in the control flow path 3 decreases, the control valve 30 operates in conjunction with the decrease in the oil pressure, so that the oil to be supplied to the lubrication flow path 2 is reduced. The oil supply device 100 is configured so that a part of the oil can be supplied to join the control flow path 3. The details will be described below.

[Oil supply device: electric motor]
As shown in FIG. 1, the electric motor 10 includes a drive shaft 11 disposed on the same axis as the drive shaft X, a motor rotor 12 that rotates integrally with the drive shaft 11, and a stator disposed at a position surrounding the motor rotor 12. 13 is accommodated in a case 14.

  The motor rotor 12 includes a plurality of permanent magnets, and a coil is wound around a core that constitutes the stator 13. Thus, the drive of the oil pump 20 is realized by the drive force of the drive shaft 11 along with the drive rotation of the motor rotor 12. The electric motor 10 is configured as a brushless DC motor, but may be configured as a synchronous motor or a motor including a brush.

[Oil supply device: Oil pump]
As shown in FIGS. 1 and 2, the oil pump 20 includes a pump housing 21, an inner rotor 23 as a pump rotor housed in a pump housing space of the pump housing 21, and an outer rotor 24. It is configured as a gear type.

  The inner rotor 23 (an example of a pump rotor) includes a plurality of external teeth 23A, and is fitted and connected to the drive shaft 11 of the electric motor 10 so as to be driven to rotate about the drive shaft core X. The outer rotor 24 includes a plurality of inner teeth 24A that mesh with the outer teeth 23A of the inner rotor 23, and is accommodated in the pump space of the pump housing 21 so as to rotate around a driven shaft core Y that is parallel to the drive shaft core X. Yes.

  Of the inner wall surface of the pump space, the suction portion 25 is formed in an arc-shaped negative pressure region that becomes negative pressure with the rotation of the inner rotor 23, and the arc-shaped pressurizing region that is pressurized with the rotation of the inner rotor 23 has 2 The first discharge unit 26 and the second discharge unit 27 are divided and formed in a non-communication state.

  In the oil pump 20, the positional relationship is set so that the meshing amount of the outer teeth 23 </ b> A of the inner rotor 23 and the inner teeth 24 </ b> A of the outer rotor 24 in the second discharge unit 27 is larger than the meshing amount of the first discharge unit 26. doing. As a result, the remaining oil that is not pumped by the first discharge section 26 is pumped by the second discharge section 27, so that the discharge amount can be distributed.

  In addition, by making the opening area of the first discharge unit 26 larger than the opening area of the second discharge unit 27, the amount of oil delivered from the first discharge unit 26 within the unit time can be reduced from the second discharge unit 27 to the unit time. The oil amount is set to be larger than the amount of oil sent out.

  As shown in FIGS. 3 to 5, the suction flow path 1 communicates with the suction portion 25, and the suction port 1 </ b> P communicating with the suction flow path 1 is formed in the flow path plate 22. The first discharge portion 26 communicates with the lubrication channel 2, and the channel plate 22 is formed with a lubrication port 2 </ b> P that communicates with the lubrication channel 2. Further, the control channel 3 communicates with the second discharge portion 27, and the control port 3P communicated with the control channel 3 is formed on the channel plate 22.

[Oil supply device: control valve]
As shown in FIGS. 4 to 7, the control valve 30 includes a spool 32 that is slidably accommodated in a spool chamber 31 formed in the pump housing 21, and an urging member that urges the spool 32 in a predetermined direction. The spool spring 33 and a pressure chamber 34 for applying an oil pressure in a direction against the urging force of the spool spring 33 are provided.

  The lubrication flow path 2 communicating with the first discharge unit 26 branches into a first introduction path 2a, a second introduction path 2b, and a third introduction path 2c, which are the first introduction port of the control valve 30. 31a, the second introduction port 31b, and the third introduction port 31c communicate with each other.

  The control valve 30 is formed with a first delivery port 31s, a second delivery port 31t, and a third delivery port 31u. The first output path 2s communicated with the first delivery port 31s as the lubrication path 2 through which the oil delivered from the control valve 30 flows, the second output path 2t communicated with the second delivery port 31t, and the third delivery port A third output path 2u communicating with 31u is formed.

  The first output path 2s and the second output path 2t merge to form the lubrication flow path 2, and the lubrication flow path 2 communicates with the lubrication port 2P. Further, the third output path 2 u joins in the middle of the control flow path 3.

  Each of the first introduction port 31a, the second introduction port 31b, and the third introduction port 31c communicates with the spool chamber 31, and the first delivery port 31s, the second delivery port 31t, and the third delivery port 31u. Communicate.

  The pressure chamber 34 is a space at the end position of the spool chamber 31, and the pilot pressure channel 2 v on which the oil pressure of the third output path 2 u acts communicates with the spool chamber 31. The first introduction path 2a communicating with the first introduction port 31a is provided with an orifice 35 (an example of a flow rate limiting unit). The pilot pressure channel 2v may be configured to communicate with the control channel 3.

  The orifice 35 suppresses a decrease in the oil pressure in the third introduction path 2c by applying resistance to the oil flow flowing from the first introduction port 31a to the first delivery port 31s. For this reason, the orifice 35 may be provided in the first output path 2s.

  The spool 32 has a cylindrical shape as a whole, and has a main control portion 32a having a groove shape around the entire circumference of the intermediate portion and a sub control portion 32b having a groove shape shallower than the main control portion 32a. An example) is formed. The spool 32 controls the lubrication position shown in FIGS. 5 and 6 and a part of the oil from the first discharge portion 26 so as to supply the entire amount of oil from the first discharge portion 26 to the lubrication flow path 2. It is configured to be slidable between the flow dividing position shown in FIG. 7 so as to be supplied to the flow path 3 and supply the remaining oil to the lubrication flow path 2.

  That is, in the state where the spool 32 reaches the position shown in FIG. 7 in the branch position, the maximum amount of oil is sent out to the third output path 2u. Further, the diversion position is an area having a certain width, and the amount of oil sent to the third output path 2u decreases as the spool 32 is displaced from the position shown in FIG. 7 toward the lubrication position.

[Operating form]
As the electric motor 10 is driven, the outer rotor 24 rotates about the driven shaft Y as the inner rotor 23 rotates about the drive shaft X. By this rotation, the suction portion 25 is in a negative pressure state, and oil is sucked into the suction flow path 1 from the suction port 1P. Further, the first discharge unit 26 and the second discharge unit 27 are in a pressurized state, and oil is sent from the first discharge unit 26 to the lubrication flow path 2 and oil is sent from the second discharge section 27 to the control flow path 3.

  In the oil supply apparatus 100, when the oil is at a low temperature, the oil having an oil pressure exceeding the necessary pressure Px (see FIGS. 8 and 9) necessary for the control target 6 to properly operate with respect to the control target 6. Supply. In addition, the lubrication target 5 is supplied with an amount of oil that exceeds the required amount Qx (see FIGS. 8 and 9) that enables sufficient lubrication.

  The oil pump 20 is designed to obtain such oil pressure and oil amount, and the drive speed of the electric motor 10 is set. Further, when the oil temperature is low, such as immediately after the engine is started, the spool 32 is brought into FIG. 6 by the action of the oil pressure acting on the pressure chamber 34 from the pilot pressure channel 2v and the urging force of the spool spring 33. Hold in the indicated lubrication position.

  In the lubrication position, the second introduction port 31b and the second delivery port 31t communicate with each other via the main control part 32a of the spool 32, the first introduction port 31a and the first delivery port 31s become non-communication, and the third The introduction port 31c and the third transmission port 31u are not in communication.

  As a result, the entire amount of oil from the first discharge section 26 flows from the second introduction port 31b to the second delivery port 31t and is supplied to the lubrication target 5 from the lubrication port 2P. Further, the oil from the second discharge unit 27 is supplied from the control flow path 3 to the control target 6 from the control port 3P.

  Next, when the oil leak in the controlled object 6 increases as the temperature rises, the oil amount in the control flow path 3 decreases and the oil pressure decreases. When the oil pressure in the control flow path 3 is reduced in this way, the pressure acting on the pressure chamber 34 from the pilot pressure flow path 2v is reduced. As a result, the spool 32 is moved to the shunt position shown in FIG. Displacement toward The reason why the oil leak in the controlled object 6 increases as the temperature rises is due to the phenomenon that the gap of the mating surface of the controlled object housing expands due to thermal expansion and the phenomenon that the oil viscosity decreases. .

  When the spool 32 is in the diversion position shown in FIG. 7, the oil flow from the second introduction port 31b to the second delivery port 31t is blocked, but the first introduction port 31a and the first delivery port 31s are It communicates via the sub control part 32b. Further, the third introduction path 2 c and the third delivery port 31 u communicate with each other via the main control unit 32 a of the spool 32.

  Thereby, a part of the oil from the first discharge section 26 flows from the third introduction path 2c to the third output path 2u and is supplied so as to join the control flow path 3, and the remaining oil is supplied. , Flows from the first introduction path 2a to the first output path 2s. In particular, when oil flows through the first output path 2 s, the oil passes through the orifice 35, so that a decrease in oil pressure upstream of the orifice 35 is suppressed. Further, since the sub-control unit 32b is formed in a shallow groove shape and has a high flow resistance, a decrease in oil pressure on the upstream side of the sub-control unit 32b is suppressed.

  As a result, the oil pressure in the third introduction path 2c and the third output path 2u can be maintained high, and the oil pressure of the oil supplied from the control path 3 to the controlled object 6 does not fall below the required pressure Px. The oil pressure can be maintained, and there is no shortage of oil.

  Since the diversion position is formed as a region having a certain width, even if the spool 32 does not reach the diversion position shown in FIG. 7, the amount of oil flowing through the third output path 2u is small, but this first The supply of oil to the three output passages 2u is started, and the amount of oil flowing through the lubrication passage 2 is also reduced.

  Further, the total amount of oil from the first discharge portion 26 is reduced to the required amount Qx so that oil shortage does not occur even when part of the oil to be supplied to the lubrication flow path 2 is supplied to the control flow path 3. A sufficiently large value is set. Furthermore, the temperature at which the transmission is in a heat radiating state is assumed to be a low temperature, and a temperature lower than the upper limit temperature when the transmission is operating is set as a high temperature.

[Oil quantity and oil pressure]
In the oil supply device 100, while reducing the load acting on the electric motor 10, as shown in the chart of FIG. 8, an oil amount exceeding the required amount Qx is supplied to the lubrication flow path 2 and necessary for the control flow path 3. It is designed to supply oil whose oil pressure exceeds the pressure Px.

  In the charts of FIGS. 8 and 9, the horizontal axis represents pressure and the vertical axis represents supply amount. When the load acting on the lubrication flow path 2 and the control flow path 3 increases when the electric motor 10 is driven, the amount of oil supplied to the lubrication flow path 2 is indicated as a first supply quantity Q1, and the control flow path The amount of oil supplied to 3 is shown as a second supply amount Q2. Since the load acts as a resistance for suppressing the flow of oil, the pressure in the lubricating flow path 2 and the control flow path 3 increases as the load increases, and the flow rate decreases. As a result, in the chart, the first supply amount Q1 and the second supply amount Q2 appear as lower right lines.

  The reason why the line of the first supply amount Q1 and the line of the second supply amount Q2 are switched stepwise is that when the pressure of the control flow path 3 is low (on the left side of the chart) This is because the spool 32 is in the diversion position because of the low pressure, and when the pressure in the control flow path 3 increases (on the right side of the chart), the spool 32 switches to the lubrication position.

  FIG. 8 shows the relationship between the load (flow path resistance) and the flow rate when the oil supply device 100 is at a low temperature (oil temperature), and FIG. 9 shows the oil supply device 100 at a high temperature (oil temperature). The relationship between the load (flow path resistance) and the flow rate in a certain case is shown.

  In these charts, since the line of the first supply amount Q1 exists in a region exceeding the required amount Qx, the load acting on the lubrication flow path 2 is oil with an oil amount exceeding the required amount Qx at any value. obtain. However, considering the load acting on the electric motor 10, it is desirable to apply the load in a region where the pressure is low (region close to the left end of the chart).

  For this reason, the load line (lubrication load R1) acting on the lubrication flow path 2 intersects with the first supply amount Q1 in the low pressure region in the low temperature chart, and the temperature rises (high temperature chart). However, the lubrication load R1 is set so that the position intersecting the first supply amount Q1 is not greatly displaced to the high pressure side.

  That is, the lubricating flow path 2 is designed so as to obtain a load (flow path resistance) represented by a line having a tendency indicated by the lubricating load R1 on the chart. As a result, the oil amount and oil pressure corresponding to the first intersection S1 where the line indicated by the lubrication load R1 and the line of the first supply amount Q1 intersect are supplied to the lubrication flow path 2, and either the low temperature or the high temperature In this case, the amount of oil exceeding the required amount Qx is obtained and the load acting on the electric motor 10 is reduced.

  As the oil temperature rises, the amount of oil leakage in the controlled object 6 increases and the control load R2 decreases. As a result, the spool 32 reaches the flow dividing position by the urging force of the spool spring 33, and resistance is applied from the orifice 35 to the oil flowing through the lubricating flow path 2. For this reason, the gradient of the lubrication load R1 line appearing on the high temperature chart is small.

  In these charts, since the line of the second supply amount Q2 is formed in a region extending from the low pressure side to the high pressure side of the necessary pressure Px, in order to obtain oil exceeding the oil pressure of the necessary pressure Px, It is necessary to set the load acting on the control flow path 3 to be higher than the required pressure Px. However, considering the load acting on the electric motor 10 as described above, it is desirable to apply the load in a region where a pressure slightly exceeding the required pressure Px is obtained.

  For this reason, even if the line of the load (control load R2) acting on the control flow path 3 intersects with the second supply amount Q2 in the low pressure region in the low temperature chart and the temperature rises (high temperature chart). However, the control load R2 is set so that the position intersecting the second supply amount Q2 is maintained on the low pressure side.

  Similarly to the lubrication load R1 described above, the control flow path R2 is also designed so as to obtain a load (flow path resistance) represented by a trend line indicated by the control load R2 in the chart. It is. As a result, the oil amount and oil pressure corresponding to the second intersection S2 where the line indicated by the control load R2 and the line of the second supply amount Q2 intersect are supplied to the control flow path 3, and either the low temperature or the high temperature Also in this case, oil having an oil pressure exceeding the required pressure Px is obtained, and the load acting on the electric motor 10 is reduced.

  As the oil temperature rises, the amount of oil leakage in the controlled object 6 increases and the control load R2 decreases. As a result, the flow resistance of the control flow path 3 decreases, and the gradient of the control load R2 line appearing in the high-temperature chart increases.

[Comparison of oil supply]
As shown in FIG. 8, for example, assuming an oil supply apparatus 100 having a configuration not including the control valve 30 and assuming a comparative lubrication load R1 ′, a comparative first supply amount Q1 ′ and a comparative lubrication load R1 The oil amount exceeding the required amount Qx is obtained corresponding to the comparison first intersection point S1 ′ where “′” intersects, but the load acting on the lubricating flow path 2 is excessively increased.

  Similarly, when the comparison control load R2 ′ is assumed, an oil pressure exceeding the necessary pressure Px is obtained, but the comparison second supply amount Q2 ′ and the comparison control load R2 ′ intersect. The oil amount exceeding the required pressure Px is obtained corresponding to the two intersection S2 ′, but the load acting on the control flow path 3 is excessively increased. For this reason, an excessive load is applied to the electric motor 10, resulting in a large energy consumption and an inconvenience that easily causes oil leakage.

  On the other hand, by setting the lubrication load R1 and setting the control load R2 as described above, the load applied to the electric motor 10 can be reduced and the oil pressure can be increased without increasing the oil pressure. Supplies an oil amount exceeding the required amount Qx, and the control flow path 3 is supplied with an oil pressure exceeding the necessary pressure Px.

[Operation / Effect of Embodiment]
In a situation where the spool 32 is maintained at the lubrication position at a low temperature, the entire amount of oil from the first discharge part 26 is supplied to the lubrication flow path 2 and the oil from the second discharge part 27 is supplied to the control flow path 3. In this case, the required amount of oil is supplied to the lubricating flow path 2 and the required oil pressure oil is supplied to the control flow path 3.

  When oil leakage increases in the controlled object 6 or the flow path communicating therewith as the temperature rises, the pressure in the pressure chamber 34 of the control valve 30 is linked to the decrease in the oil pressure in the control flow path 3. As a result, the spool 32 is set to the diversion position, and a part of the oil to be supplied to the lubrication flow path 2 is supplied to the control flow path 3 and supplied to the control object 6, and as a result, the oil pressure Can be maintained at a value exceeding the required pressure.

  Further, when oil is supplied to the control flow path 3, the orifice 35 acts on the oil flowing in the first introduction path 2a, so that the oil having a pressure in which the pressure drop is suppressed is supplied from the third introduction path 2c. It is supplied to the third output path 2u. As a result, the oil pressure in the control flow path 3 can be maintained at a high value.

  Furthermore, since the spool 32 of the control valve 30 operates in conjunction with a pressure drop in the control flow path 3, for example, an electric motor is used compared with a spool 32 whose position is switched in conjunction with an increase in oil pressure. 10 can be reduced and power consumption can be reduced.

  In particular, when designing the oil supply apparatus 100, by appropriately setting the lubrication load R1 for determining the first supply amount Q1 flowing in the lubrication flow path 2, an increase in the load acting on the electric motor 10 is suppressed. On the other hand, the oil supply of the oil amount exceeding the required amount Qx is realized in the region where the oil temperature ranges from the low temperature to the high temperature. Similarly, by appropriately setting the control load R2 for determining the second supply amount Q2 flowing through the control flow path 3, the oil temperature is reduced from a low temperature while suppressing an increase in the load acting on the electric motor 10. Oil supply with an oil pressure exceeding the required pressure Px is realized in a region extending over a high temperature.

[Another embodiment]
In addition to the above-described embodiments, the present invention may be configured as follows (the components having the same functions as those of the embodiments are given the same numbers and symbols as those of the embodiments).

(A) As shown in FIG. 10, a pressure channel 42 (an example of a pilot pressure channel) that includes a pressure sensor 41 that detects the oil pressure of the control channel 3 and connects the control channel 3 and the pressure chamber 34; An electromagnetic valve 43 that controls the pressure of the pressure chamber 34 is provided in the pressure flow path 42, and a control unit 44 that controls the electromagnetic valve 43.

  In this other embodiment, when the oil pressure detected by the pressure sensor 41 is equal to or higher than a set value, the control unit 44 pressurizes the electromagnetic valve 43 shown in FIG. 10 (position for opening the pressure channel 42). Control to set to. Thereby, the oil pressure of the control flow path 3 is applied to the pressure chamber 34, the spool 32 is set to the lubrication position, and the entire amount of oil from the first discharge part 26 is supplied to the lubrication flow path 2.

  When the pressure sensor 41 detects that the oil pressure has decreased below the set value, the control unit 44 sets the solenoid valve 43 to the drain position (position where the pressure flow path 42 is closed) shown in FIG. To do. As a result, the pressure acting on the pressure chamber 34 from the control channel 3 is shut off, and at the same time, the oil in the pressure chamber 34 is discharged. Further, the spool 32 is set to the diversion position by the urging force of the spool spring 33, and a part of the oil from the first discharge portion 26 flows from the third introduction path 2 c to the third output path 2 u and enters the control flow path 3. On the other hand, the remaining oil flows so as to merge with each other, and the remaining oil flows from the first introduction path 2a to the first output path 2s.

  In this manner, the spool 32 of the control valve 30 can be reliably switched between the lubrication position and the diversion position by the electrical control of the control unit 44, and is controlled in response to the pressure drop in the control flow path 3 with good response. The oil pressure of the oil supplied to the object 6 can be maintained. Further, in this configuration, since the position of the spool 32 is determined using the oil pressure, a small electromagnetic solenoid can be used unlike the case where the spool 32 is directly controlled by the driving force of the electromagnetic solenoid.

  In this different embodiment (a), as in the embodiment, in order to determine the lubrication load R1 for determining the first supply amount Q1 flowing through the lubrication flow path 2 and the second supply amount Q2 flowing through the control flow path 3. By appropriately setting the control load R2, the increase in the load acting on the electric motor 10 is suppressed.

  As a modified example of another embodiment (a), a control signal is intermittently output to the electromagnetic solenoid of the electromagnetic valve 43, and the duty ratio of the control signal is adjusted to adjust the pressure position within a short time. Control for switching to the drain position may be performed. In this configuration, the oil pressure acting on the pressure chamber 34 is adjusted, and the spool 32 can be set to an intermediate position between the lubrication position and the diversion position. By this control, it is possible to finely adjust the amount of oil supplied so as to merge with the control flow path 3, and the pressure in the control flow path 3 can be set with high accuracy.

  As a modification of another embodiment (a), a pressure channel 42 is formed so as to guide oil from the first discharge section 26 to the pressure chamber 34, and an electromagnetic valve 43 is interposed in the pressure channel 42. Even with this configuration, the position of the spool 32 can be set by controlling the pressure in the pressure chamber 34.

  As a modification of another embodiment (a), the pressure sensor 41 is disposed at a position where the pressure in the intermediate flow path between the control port 3P and the control target 6 is detected. As a result, it is possible to detect the oil pressure acting on the control target 6 with high accuracy and supply the oil with the required oil pressure to the control target 6.

(B) As shown in FIG. 12, a relief port 31d that discharges oil from the pressure chamber 34 while the spool 32 is in the lubrication position without changing the basic configuration of the control valve 30 shown in the embodiment. Form.

  In the configuration of this alternative embodiment, the oil in the pressure chamber 34 is discharged from the relief port 31d even when the pressure acting on the pressure chamber 34 from the pilot pressure flow path 2v rises from an assumed value. 12, the spool 32 can be maintained at the lubrication position. Furthermore, it is possible to prevent breakage of the control circuit and oil leakage from the seal portion. Further, when the pressure chamber 34 is lowered from the pilot pressure flow path 2v, the spool 32 is operated in the same manner as described in the embodiment, so that the spool 32 can be set to the diversion position as shown in FIG. It becomes possible.

  With this configuration, the balance between the pressure acting on the pressure chamber 34 and the urging force of the spool spring 33 can be easily adjusted.

  In this alternative embodiment (b) as well, in order to determine the lubrication load R1 for determining the first supply amount Q1 flowing in the lubrication flow path 2 and the second supply amount Q2 flowing in the control flow path 3, as in the embodiment. By appropriately setting the control load R2, the increase in the load acting on the electric motor 10 is suppressed.

(C) As a structure for forming the first discharge part 26 and the second discharge part 27, a partition member that divides a single discharge port into two parts is provided to form two discharge ports.

  In the configuration of this another embodiment, in the pump having a single discharge part, the partition member is provided so as to cover a part of the discharge part, so that the basic design of the pump is not greatly changed. It is possible to create a two-port pump on the side. Further, by configuring so that the position of the partition member can be finely adjusted, it is possible to adjust the oil amount and the oil pressure in the lubricating flow path 2 and the control flow path 3.

(D) The oil pump 20 is divided into three or more pressurization regions so that oil can be supplied to other oil supply targets of the lubrication flow path 2 and the control flow path 3.

(E) As the oil pump 20, a pump chamber having a cylindrical inner surface centering on a predetermined main shaft core is formed, and the rotating body provided on the rotary shaft core that is eccentric from the main shaft core of the pump chamber is arranged in the radial direction. A plurality of vanes are provided so as to be freely withdrawn and retracted, and the vane pump type is configured to drive the rotating body in a state where the protruding end of each vane is in sliding contact with the inner surface of the pump chamber.

  Even in the case where the oil pump 20 is configured in the vane pump type as described above, the suction pump 25, the first discharge unit 26, and the second discharge unit 27 are formed to function as the oil pump 20 as in the embodiment. It becomes possible.

  INDUSTRIAL APPLICABILITY The present invention can be used for an oil supply apparatus that supplies oil to a lubrication flow path that supplies a bearing portion or the like and a control flow path that supplies a hydraulic clutch or the like.

2 Lubrication channel 3 Control channel 21 Pump housing (housing)
23 Inner rotor (pump rotor)
25 Suction part 26 First discharge part 27 Second discharge part 30 Control valve 31a First introduction port 31b Second introduction port 31c Third introduction port 31d Relief port 31s First delivery port 31t Second delivery port 31u Third delivery port 32 Spool 33 Spool spring (biasing member)
34 Pressure chamber 35 Orifice (flow restriction part)
41 Pressure sensor 42 Pressure channel (Pilot pressure channel)
43 Solenoid valve 44 Control unit

Claims (5)

A pump rotor is rotatably accommodated in the housing, a suction part is formed in the housing in a negative pressure region that becomes negative pressure as the pump rotor rotates, and a pressurizing region that is pressurized as the pump rotor rotates The oil pump is configured by forming the first discharge portion and the second discharge portion in the housing by dividing into at least two,
A lubrication flow path for sending oil from the first discharge section to a lubrication target;
A control flow path for sending oil from the second discharge part to a control target;
When the oil pressure in the control channel is greater than or equal to a set value, the entire amount of oil from the first discharge part is supplied to the lubrication channel, and when the oil pressure in the control channel is less than the set value An oil supply apparatus comprising: a control valve that supplies part of the oil from the first discharge unit to the control flow path. A lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and a part of the oil from the first discharge section is supplied to the control flow path and the remaining oil A spool that is operable to a diversion position for supplying the lubricating flow path,
A biasing member that biases the spool toward the diversion position;
The oil supply apparatus according to claim 1, further comprising a pressure chamber configured to act on the spool in a direction against an urging force of the urging member with respect to the spool. A lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and a part of the oil from the first discharge section is supplied to the control flow path and the remaining oil A spool that is operable to a diversion position for supplying the lubricating flow path,
A biasing member that biases the spool toward the diversion position;
A pressure chamber acting on the spool in a direction against the biasing force of the biasing member;
A pilot pressure channel that causes the pressure of the first discharge part or the second discharge part to act on the pressure chamber via an electromagnetic valve;
A pressure sensor for detecting the pressure of the control flow path, and when the pressure detected by the pressure sensor is equal to or higher than the set value, the electromagnetic valve is opened to apply the pressure of the control flow path to the pressure chamber. The oil supply device according to claim 1, further comprising a control unit that closes the electromagnetic valve when a pressure detected by the pressure sensor is less than the set value. A lubrication position in which the control valve supplies the entire amount of oil from the first discharge section to the lubrication flow path, and a part of the oil from the first discharge section is supplied to the control flow path and the remaining oil A spool that is operable to a diversion position for supplying the lubricating flow path,
A biasing member that biases the spool toward the diversion position;
A pressure chamber that causes the oil pressure of the control flow path to act on the spool in a direction against the biasing force of the biasing member;
The oil supply device according to claim 1, further comprising a relief port that discharges oil in the pressure chamber when the spool reaches the lubrication position due to pressure of oil supplied to the pressure chamber. The valve housing that houses the spool includes a first introduction port to which oil from the first discharge portion is supplied, a second introduction port, and a third introduction port, and sends out the oil to the lubrication flow path. A first delivery port, a second delivery port, and a third delivery port for delivering oil to the control flow path,
When the spool is in the lubrication position, supplying oil from the second introduction port to the second delivery port while blocking the flow of oil to the first delivery port and the third delivery port, When the spool is in the diversion position, the oil from the first introduction port is supplied to the first delivery port while blocking the flow of oil to the second delivery port, and the third introduction port The spool is configured to supply oil from the third delivery port;
The oil supply device according to any one of claims 2 to 4, further comprising a flow rate limiting unit that applies resistance to a flow of oil flowing from the first introduction port to the first delivery port.

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