JP2010038304A - Lubricating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating device capable of suppressing variation of height of an oil surface in an oil storage part and reducing oil usage. <P>SOLUTION: As consistency of oil 17 decreases and a return amount of the oil 17 returned from a lubricated part 20 to an oil pan 10 by a returning pipe 12 increases according to rise in temperature of the oil 17, a storage amount of the oil 17 increases in the oil pan 10, and the height of the storage part oil surface which is the oil surface in the oil pan 10 rises. Here, as a piston 14 is slid to an oil non-introducing room 13a side by an actuator 15 according to rise in temperature of storage-part oil which is the oil 17 stored in the oil pan 10, a volume of an oil introducing room 13b increases, and the storage-part oil is introduced to the oil introducing room 13b. As an increased amount of the volume of the oil introducing room 13b is equivalent to a decreased amount of a volume of the oil non-introducing room 13a, an increased amount of the return amount is absorbed to the oil non-introducing room 13a positioned below the storage part oil surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lubrication device used in, for example, a transmission for a vehicle.

  For example, in a transmission for a vehicle or the like, a lubrication device is used for the reason of reducing the frictional force between members.

  In the lubricating device, the reservoir oil, which is the oil stored in the oil reservoir, is supplied to the lubricated portion by a supply means such as a gear or a pump. A part of the oil supplied to the lubricated part temporarily stays in order to lubricate the lubricated part. The oil supplied to the lubricated part by the supply means is returned to the oil storage part by its own weight by the return means such as the return pipe and the inner wall of the transmission housing. That is, the oil circulates between the oil storage part and the lubricated part.

  Here, when the temperature of the oil increases, the viscosity of the oil decreases. The amount of retained oil that temporarily remains in the lubricated part, that is, the amount of retained oil retained in the lubricated part, decreases as the temperature of the circulating oil increases and the viscosity of the retained oil decreases. . Therefore, if the supply amount, which is the amount of oil supplied to the lubricated portion by the supply means, is constant, the return is the amount of oil that returns to the oil storage portion by the return means as the temperature of the circulating oil rises. The amount will increase. Accordingly, as the temperature of the circulating oil, that is, the reservoir oil increases, the storage amount that is the amount of the reservoir oil increases, so the height of the reservoir oil level that is the oil level of the reservoir oil is increased. Rises. That is, as the temperature of the reservoir oil rises, the retained amount decreases, the reservoir amount increases, and the reservoir oil level rises. Therefore, for example, the supply means is disposed in the oil reservoir, and the outer peripheral portion is always located below the oil level of the reservoir, and the gear rotates to cause the reservoir oil to be swung up by rotating the gear. In the case of supplying oil to the tank, the height of the oil level of the reservoir increases, so that the portion of the gear immersed in the oil expands and the stirring loss may increase.

  Then, in order to suppress the increase in agitation loss, a lubricating device that changes the height of the reservoir oil surface has been proposed, and an example thereof is disclosed in Patent Document 1 below.

  In the lubricating device disclosed in Patent Document 1, the cylinder is disposed with the axial direction set to the vertical direction. The lower end of this cylinder is immersed in the reservoir oil. Furthermore, a piston is provided inside the cylinder, and this piston is slidable in the axial direction, that is, in the vertical direction inside the cylinder. The piston divides the inside of the cylinder in the axial direction into an oil introduction chamber and an oil non-introduction chamber. The oil introduction chamber opens downward, and the oil introduction chamber is filled with a part of the reservoir oil. On the other hand, the oil non-introducing chamber is opened upward, and the oil non-introducing chamber is filled with air inside the lubricating device. A spring made of a shape memory alloy is disposed between the lower end of the cylinder and the piston, and this spring connects the lower end of the cylinder and the piston. This spring is immersed in the reservoir oil in the oil introduction chamber. When the temperature of the reservoir oil rises, the spring expands and pushes up the piston. As a result, the volume in the oil introduction chamber is increased, and the reservoir oil is further sucked into the oil introduction chamber. Therefore, regardless of the temperature change of the reservoir oil, an increase in the height of the reservoir oil surface is suppressed, and an increase in stirring loss due to the gear is suppressed.

Japanese Utility Model Publication No. 63-142465

  However, the lubricating device disclosed in Patent Document 1 is configured to absorb the increase in the return amount in the oil non-introduction chamber provided outside the oil storage section, and therefore stores regardless of the temperature change of the oil. If the oil level is to be constant, the amount of oil existing below the reference reservoir oil level, which is the height of this constant reservoir oil level, and the reference when the return amount is maximum When maintaining the reservoir oil level, the sum of the amount of oil introduced into the portion above the reference reservoir oil level must be stored in advance in the oil reservoir. Therefore, the use lower limit reservoir oil level which is the reservoir oil level at which the reservoir oil can be supplied to the lubricated part by the supply means at the use lower limit temperature which is the lower limit value of the temperature of the reservoir oil at which the lubricating device can be used. When the oil is used as the reference reservoir oil level, the oil exceeding the reservoir oil that can maintain the use lower limit reservoir oil level must be stored in the oil reservoir. Therefore, there is a problem that the amount of oil used, which is the amount of oil used by the lubricating device, increases.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the lubrication apparatus which can reduce the oil usage-amount while suppressing the fluctuation | variation of the oil surface height in an oil storage part.

  In order to solve the above-described problems and achieve the object, a lubricating device according to the present invention includes an oil reservoir that stores oil, a supply unit that supplies the stored oil to the lubricated portion, And a return device for returning the oil supplied to the lubricated portion to the oil storage portion, a cylinder provided in the oil storage portion without being exposed from the stored oil, and the cylinder An oil introduction chamber that is slidable in the axial direction inside the cylinder and that opens inside the cylinder in the axial direction to the oil reservoir, and oil non-introduction in which the stored oil does not enter A piston that is divided into a chamber, and is interposed between the cylinder and the piston, and slides the piston toward the oil non-introducing chamber as the temperature of the stored oil rises It is characterized by comprising an actuator, the that.

  Moreover, it is preferable that the lubrication apparatus further includes a breather that communicates the inside of the oil non-introduction chamber and the outside of the oil reservoir.

  In the lubricating device, following the change in the return amount of the oil returned to the oil storage portion with respect to the temperature change of the stored oil, the oil introduction chamber with respect to the temperature change of the stored oil. It is preferable to set at least one of a force for sliding the piston by the actuator or an area of a portion exposed to the oil introduction chamber of the piston so that the volume can be changed. .

  In the lubricating device, a change amount of the volume of the oil introduction chamber with respect to a temperature change of the stored oil is smaller than a change amount of the return amount of the oil with respect to a temperature change of the stored oil. Thus, it is preferable to set at least one of the force of sliding the piston by the actuator or the area of the portion of the piston exposed in the oil introduction chamber.

  Moreover, in the said lubrication apparatus, when the temperature of the oil stored in the said oil storage part is below a use minimum temperature, it is preferable that the volume of the said oil introduction chamber is made into the minimum.

  In the lubricating device, the actuator is connected to both the cylinder and the piston in the oil non-introduction chamber, and is made of a material that contracts as the temperature of the stored oil rises. And a piston return spring that is connected to both the cylinder and the piston and biases the piston toward the oil introduction chamber.

  Further, in the lubrication apparatus, the actuator is connected to both the cylinder and the piston in the oil introduction chamber, and is formed of a material that extends as the temperature of the stored oil increases. And a piston induction spring that is connected to both the cylinder and the piston and biases the piston toward the oil non-introducing chamber.

  In the present invention, the piston slides toward the oil non-introducing chamber by the actuator as the temperature of the reservoir oil, which is the oil stored in the oil reservoir, rises, increasing the volume of the oil introducing chamber. Let That is, the reservoir oil is introduced into the oil introduction chamber as much as the volume of the oil introduction chamber increases as the temperature of the reservoir oil increases. Further, as described above, out of the oil supplied to the lubricated portion by the supply means, the retained amount that is temporarily retained in the lubricated portion, that is, the amount of retained oil retained in the lubricated portion is the reservoir portion. Since the oil temperature decreases as the oil temperature rises, the return amount that is the amount of oil returned from the lubricated portion to the oil reservoir by the return means increases as the temperature of the reservoir oil rises. Here, since the cylinder is not exposed from the stored oil, that is, is located below the reservoir oil level that is the oil level of the reservoir oil, it is the volume of the oil reservoir below the reservoir oil level. The storage part volume below the oil level includes the volume of the oil non-introduction chamber in which the storage part oil is not introduced. By the way, when the volume of the oil introduction chamber increases as the temperature of the reservoir oil increases, the volume of the oil non-introduction chamber decreases. That is, when the return amount increases as the temperature of the reservoir oil increases, the increase in the return amount is introduced into the decrease in the oil non-introduction chamber. As a result, the increase in the return amount that increases as the temperature of the reservoir oil rises is absorbed by the oil non-introduction chamber, and is introduced into the oil introduction chamber among the reservoir oil below the reservoir oil level. Since the actual storage amount, which is the amount of the actual reservoir oil excluding the introduced oil, does not fluctuate, there is an effect that fluctuation in the height of the reservoir oil surface can be suppressed.

  In the present invention, the volume below the oil level also includes the volume of the oil non-introduction chamber in which the reservoir oil is not introduced, so the volume of the oil introduction chamber is minimum, that is, the volume of the oil non-introduction chamber is maximum. In the state where the actual storage amount is minimum and the oil is circulating, the supply oil level is lower than the predetermined oil level, for example, the lower limit temperature of the storage unit oil temperature at which the lubricating device can be used. Therefore, the amount of oil that can be used as the lower limit oil level of the reservoir, which is the lower limit of the oil level of the reservoir that can supply the reservoir oil to the lubricated part, may be stored in the oil reservoir. Therefore, compared to the case where the oil non-introduction chamber is provided outside the oil reservoir, for example, the amount of oil used, which is the amount of oil used by the lubrication device, is reduced in order to maintain the oil level of the lower limit reservoir. There is an effect that can be done.

  Further, in the present invention, the air can flow between the inside of the oil non-introduction chamber and the outside of the oil reservoir by the breather as the piston slides, so that the volume of the oil non-introduction chamber can be easily and easily reduced. Can change quickly. In other words, as the piston slides, the volume of the oil introduction chamber is changed easily and quickly, and the introduction amount, which is the amount of oil in the oil introduction chamber, is changed easily and quickly. There is an effect that the adjustment can be performed easily and quickly.

  Moreover, in this invention, the volume of the oil introduction chamber with respect to the temperature change of the reservoir oil can be changed following the change in the return amount with respect to the temperature change of the reservoir oil. Therefore, the amount of change of the volume of the oil introduction chamber with respect to the temperature change of the reservoir oil, that is, the amount of change of the introduced oil can be matched with the amount of change of the return amount with respect to the temperature change of the reservoir oil. Thereby, even if the temperature of storage part oil changes, there exists an effect that the height of a storage part oil surface can be kept constant.

  In the present invention, even if the temperature of the reservoir oil changes, the amount of change in the volume of the oil introduction chamber is smaller than the amount of change in the return amount, so that the reservoir oil increases as the temperature of the reservoir oil rises. The height of the surface can be adjusted in the increasing direction. In other words, even if the amount of oil used corresponds to the lower limit reservoir oil level, the height of the reservoir oil level is used at normal times, i.e., when the reservoir oil temperature exceeds the lower limit temperature. It will not be less than the oil level of the lower limit reservoir. Therefore, for example, even when the reservoir oil level locally fluctuates during vehicle turning or vehicle acceleration / deceleration, the height of the reservoir oil level is less than the height of the use lower limit reservoir oil level. Can be suppressed. Thereby, there exists an effect that the performance of a lubricating device can be maintained.

  Embodiments of a lubricating device according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the following embodiments.

  Hereinafter, the lubrication apparatus according to the embodiment will be described. FIG. 1 shows a schematic diagram of a lubricating device according to an embodiment. FIG. 2 is a schematic view showing an outline of the lubricating device according to the embodiment when the temperature of the oil rises. The lubrication apparatus 1 includes an oil pan 10, a supply unit 11, a return pipe 12, a cylinder 13, a piston 14, an actuator 15, and a breather 16.

  The oil pan 10 is an oil reservoir. The oil pan 10 is for storing the oil 17. The oil pan 10 is provided in the vehicle transmission 2. The oil pan 10 has a use lower limit oil level. This lower limit oil level is stored in the oil pan 10 as an oil storage section by a pump 11a described later in a state where the oil 17 circulates between the oil pan 10 and the lubricated part 20 as described later. It is the height of the use lower limit oil level which is the lower limit value of the oil level that can pump up the reservoir oil that is the oil 17 that is being used. In the oil pan 10, when the oil 17 is circulated between the oil pan 10 and the lubricated part 20 at a use lower limit temperature, which is a lower limit value of the temperature of the reservoir oil in which the lubricating device 1 can be used, The amount by which the height of the reservoir oil level, which is the oil level in the oil pan 10 as the oil reservoir, is equal to or higher than the lower limit oil level, and in this embodiment, the height of the reservoir oil level is the lower limit oil level. An equal amount of oil 17 is stored.

  The supply unit 11 is a supply unit. The supply unit 11 supplies the storage unit oil to the lubricated unit 20. In this embodiment, the supply unit 11 supplies the storage unit oil not only to the lubricated unit 20 but also to the controlled object 30. The supply unit 11 includes a pump 11a and a hydraulic control circuit unit 11b. The lubricated portion 20 needs to be supplied with oil 17 such as between a belt and a pulley when the transmission 2 is, for example, a belt type continuously variable transmission. It is a place. Further, the control target 30 is, for example, a pulley provided in a torque converter and a belt-type continuously variable transmission, a piston that engages with a clutch in a clutch mechanism portion, or the like.

  The suction port of the pump 11 a is located below the lower limit oil level in the oil pan 10. For this reason, when the amount of oil 17 in which the height of the reservoir oil level is equal to or higher than the lower limit oil level is stored in the oil pan 10, the suction port of the pump 11a is immersed in the reservoir oil. It will be. On the other hand, the discharge port of the pump 11a is connected to the introduction port of the hydraulic control circuit unit 11b. As a result, the pump 11a is connected to the hydraulic control circuit unit 11b.

  The hydraulic control circuit unit 11b controls the pressure of the oil 17 supplied to the lubricated unit 20 and the control target 30 by the pump 11a. Inside the hydraulic control circuit unit 11 b, the flow path of the oil 17 pumped up from the oil pan 10 by the pump 11 a and the first flow path for supplying the oil 17 to the lubricated part 20, and the oil 17 to the controlled object 30. It branches into two with the second flow path for supply. Further, the first flow path is provided with a valve (not shown) for controlling the pressure of the oil 17 supplied to the lubricated part 20, in this embodiment, a solenoid valve is provided, while the second flow path is A valve (not shown) for controlling the pressure of the oil 17 supplied to the controlled object 30, a solenoid valve in this embodiment, is provided. In this embodiment, the two solenoid valves of the hydraulic control circuit unit 11b are respectively connected to an ECU (Electric Control Unit) (not shown), and the opening degrees of the two solenoid valves of the hydraulic control circuit unit 11b are respectively It is independently controlled by electronic control based on an instruction from the ECU. For this reason, the pressure of the oil 17 supplied to the lubricated part 20 and the pressure of the oil 17 supplied to the controlled object 30 are independently controlled by the hydraulic control circuit of the hydraulic control circuit unit 11b. That is, the first flow path of the hydraulic control circuit unit 11b supplies the oil 17 pumped up from the oil pan 10 by the pump 11a to the lubricated unit 20 while controlling the pressure. On the other hand, the discharge port of the second flow path of the hydraulic control circuit unit 11b is connected to the control object 30, and the second flow path of the hydraulic control circuit unit 11b is the oil 17 pumped up from the oil pan 10 by the pump 11a. Is supplied to the controlled object 30 by controlling the pressure.

  The return pipe 12 is a return means. The return pipe 12 is for returning the oil 17 supplied to the lubricated part 20 to the oil pan 10 by its own weight. The return pipe 12 communicates the inside of the space in which the lubricated portion 20 is disposed, for example, the interior of the housing of the transmission 2 and the interior of the oil pan 10. The return pipe 12 is connected to the lubricated portion 20. Is returned to the oil pan 10 by its own weight.

  The cylinder 13 is for absorbing an increase in the return amount of the oil 17 returned from the lubricated portion 20 to the oil pan 10 by the return pipe 12 as the temperature of the reservoir oil rises in an oil non-introduction chamber 13a described later. It is. The cylinder 13 is formed in a cylindrical shape, in this embodiment, in which the cross-sectional shape orthogonal to the axial direction of the internal space is the same regardless of the position in the axial direction. The cylinder 13 is provided inside the oil pan 10 and below the lower limit oil level. For this reason, when the amount of oil 17 in which the height of the reservoir oil level is equal to or higher than the lower limit oil level is stored in the oil pan 10, the cylinder 13 is not exposed from the reservoir oil, in other words. The whole will sink in the reservoir oil. In this embodiment, the cylinder 13 is provided integrally with the bottom wall of the oil pan 10 with the axial direction being the horizontal direction. Furthermore, in this embodiment, the cylinder 13 has one end in the axial direction integrated with the side wall of the oil pan 10, and one end in the axial direction of the cylinder 13 is closed by the side wall of the oil pan 10. A part of the cylinder 13, for example, a bottom part or a side part, may be configured from existing parts in the transmission 2, for example, a bottom wall or a side wall of the oil pan 10 or the like. Moreover, the cylinder 13 is comprised from the material which has heat conductivity, This cylinder 13 makes the temperature of the air inside the oil non-introduction chamber 13a mentioned later follow the temperature of the storage part oil.

  The piston 14 is for changing the amount of introduction, which will be described later, introduced into the cylinder 13. The piston 14 is provided inside the cylinder 13. Piston 14 is formed in shapes, such as plate shape and block shape, for example. In this embodiment, the surface of the piston 14 that faces the oil non-introducing chamber 13a, which will be described later, and the surface that faces the oil introducing chamber 13b are perpendicular to the axial direction in this embodiment, and face the oil non-introducing chamber 13a of the piston 14. The shape of the surface that faces the oil introduction chamber 13 b is equal to the cross-sectional shape that is orthogonal to the axial direction of the internal space of the cylinder 13. That is, the area of the surface of the piston 14 that faces the oil non-introducing chamber 13 a and the surface of the piston 14 that faces the oil introducing chamber 13 b are equal to the area of the cross section perpendicular to the axial direction of the internal space of the cylinder 13. The piston 14 is slidable in the cylinder 13 in the axial direction, in this embodiment, in the horizontal direction. The piston 14 divides the inside of the cylinder 13 into two spaces in the axial direction, in this embodiment, the horizontal direction. Of the two divided spaces, the space on the one end side in the axial direction of the cylinder 13 is an oil non-introducing chamber 13a into which the reservoir oil does not enter. On the other hand, of the two spaces inside the cylinder 13 divided by the piston 14, the space on the other axial end side of the cylinder 13 is an oil introduction chamber 13 b that opens to the oil pan 10. That is, by sliding the piston 14, the volume of the oil non-introducing chamber 13a and the volume of the oil introducing chamber 13b can be changed. Further, the sliding amount of the piston 14 is equal to the increasing amount of the axial length of the oil introduction chamber 13b and the decreasing amount of the axial length of the oil non-introducing chamber 13a. The increase in the axial length of the introduction chamber 13b is equal to the decrease in the axial length of the oil non-introduction chamber 13a due to the sliding of the piston 14 at this time. As a result, the sliding of the piston 14 occurs. The increase in the volume of the oil introduction chamber 13b accompanying this is equal to the decrease in the volume of the oil non-introduction chamber 13a accompanying the sliding of the piston 14 at this time. The piston 14 is restricted from sliding toward the other end in the axial direction by a piston stopper 13c provided to protrude inward in the radial direction at the other end in the axial direction of the cylinder 13, for example.

  The actuator 15 slides the piston 14 toward the oil non-introducing chamber 13a as the temperature of the reservoir oil rises. The actuator 15 includes a contracting member 15a and a piston return spring 15b.

  The contraction member 15a is connected to both the cylinder 13 and the piston 14 in the oil non-introduction chamber 13a. In this embodiment, one end of the contracting member 15 a is fixed to the side wall of the oil pan 10, whereby one end of the contracting member 15 a is fixed to the cylinder 13 through the side wall of the oil pan 10. . On the other hand, in this embodiment, the other end of the contracting member 15a is fixed to the surface of the piston 14 facing the non-oil introduction chamber 13a. In this embodiment, the contraction member 15a is connected to both the cylinder 13 and the piston 14 as described above. Such a contraction member 15a is made of a material that contracts as the temperature of the air in the oil non-introduction chamber 13a increases, that is, a material that contracts as the temperature of the reservoir oil increases. In this embodiment, the contracting member 15a is made of a shape memory alloy. In addition, the contraction member 15a may be made of bimetal.

  The piston return spring 15b is connected to both the cylinder 13 and the piston 14 so as to be contracted from the natural length. In this embodiment, the piston return spring 15b is disposed in the oil non-introducing chamber 13a. In this embodiment, one end portion of the piston return spring 15 b is fixed to the side wall of the oil pan 10, whereby one end portion of the piston return spring 15 b is fixed to the cylinder 13 via the side wall of the oil pan 10. ing. On the other hand, in this embodiment, the other end portion of the piston return spring 15b is fixed to the surface of the piston 14 facing the oil non-introducing chamber 13a. In this embodiment, as described above, the piston return spring 15b is connected to both the cylinder 13 and the piston 14, and urges the piston 14 toward the oil introduction chamber 13b. The piston return spring 15b may be connected to both the cylinder 13 and the piston 14 so as to extend from the natural length in a state where the piston return spring 15b is disposed in the oil introduction chamber 13b.

  Here, in this embodiment, following the change in the return amount of the oil 17 returned to the oil pan 10 with respect to the temperature change of the reservoir oil, the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil is changed. The force for sliding the piston 14 by the contracting member 15a, the force for sliding the piston 14 by the piston return spring 15b, and the force for sliding the piston 14 by the contracting member 15a and the piston return spring 15b Is set in consideration of More specifically, here, the volume of the oil introduction chamber 13b with respect to the temperature change of the storage section oil can be changed following the change in the return amount with respect to the temperature change of the storage section oil, that is, the storage section. The non-introduction of the oil in the contracting member 15a so that the piston 14 slides by a distance in the axial direction obtained by dividing the amount of change of the return amount with respect to the temperature change of the oil by the area value of the surface of the piston 14 facing the oil introduction chamber 13b The contraction force with respect to the temperature of the air in the chamber 13a and the spring constant of the piston return spring 15b, the contraction force with respect to the temperature in the oil non-introduction chamber 13a of the contraction member 15a, and the biasing force to the piston 14 by the piston return spring 15b. It is set with consideration. As described above, the cylinder 13 has thermal conductivity that causes the temperature of the air inside the oil non-introduction chamber 13a to follow the temperature of the reservoir oil. In other words, the contraction force with respect to the temperature of the air in the chamber 13a becomes the contraction force with respect to the temperature of the reservoir oil of the contraction member 15a. For example, when the temperature of the reservoir oil, that is, the temperature of the air inside the oil non-introduction chamber 13a is equal to or lower than the use lower limit temperature, the contraction member 15a is in an extended state in the axial direction, and no oil is introduced. As the temperature of the air inside the chamber 13a rises from the lower limit temperature, it contracts in the axial direction until it reaches the upper limit temperature that is at least the upper limit temperature of the reservoir oil that can use the lubricating device 1. The material to be used may be applied. Further, the piston return spring 15b is a spring having a length which is not more than a natural length when the volume of the oil introduction chamber 13b is minimum, that is, when the volume of the oil non-introduction chamber 13a is maximum, and the piston 14 What is necessary is just to apply what has a spring constant that the magnitude | size of the urging | biasing force given to piston 14 becomes smaller than the magnitude | size of the contraction force of the contraction member 15a, when is located in the predetermined position of an axial direction.

Here, as shown in FIG. 3A, the temperature T of the oil 17 circulating between the oil pan 10 and the lubricated part 20, that is, the temperature of the reservoir oil and the return amount Q The correlation is measured in advance from the use lower limit temperature Tmin to the use upper limit temperature Tmax. Then, as shown in FIG. 3 (b), the contraction member 15a so that the decrease in the volume V of the oil non-introduction chamber 13a is equal to the increase in the return amount Q with respect to the temperature change of the reservoir oil. The contraction force with respect to the temperature of the reservoir oil and the spring constant of the piston return spring 15b are set as described above. At this time, the following equation (1) is established. In Equation (1), Qmin and Vmax indicate the minimum value of the return amount Q and the maximum value of the volume V of the oil non-introducing chamber 13a, respectively.
Q-Qmin = Vmax-V (1)

  With the actuator 15 as described above, in this embodiment, when the oil 17 circulates between the oil pan 10 and the lubricated part 20, the temperature of the reservoir oil is equal to or lower than the use lower limit temperature. The piston 14 interferes with the piston stopper 13c of the cylinder 13 and is restricted from sliding toward the oil introduction chamber 13b. For this reason, in this embodiment, when the temperature of the reservoir oil is equal to or lower than the use lower limit temperature, the volume of the oil introduction chamber 13b is minimized. Further, in a state where the oil 17 circulates between the oil pan 10 and the lubricated part 20, the piston 14 is at least used until the temperature of the reservoir oil rises from the use lower limit temperature to at least the use upper limit temperature. Is slid by the actuator 15 toward the oil non-introducing chamber 13a. For this reason, in this embodiment, when the temperature of the reservoir oil increases from the lower limit temperature of use, the volume of the oil introduction chamber 13b increases, and when the temperature of the reservoir oil reaches the upper limit of use temperature, The volume of the introduction chamber 13b is maximized.

  The breather 16 allows air to flow between the inside of the oil non-introduction chamber 13 a and the outside of the oil pan 10. The breather 16 is attached to the side wall of the oil pan 10 that closes one end of the cylinder 13 in the axial direction, and communicates the inside of the oil non-introducing chamber 13a with the outside of the oil pan 10. As a result, in the lubricating device 1, the air can flow between the inside of the oil non-introducing chamber 13 a and the outside of the oil pan 10 by the breather 16 as the piston 14 slides. For this reason, the volume of the oil non-introducing chamber 13a can be changed easily and quickly. As a result, the piston 14 can be easily and quickly slid. Therefore, the volume of the oil introduction chamber 13b can be changed easily and quickly, and the amount of oil 17 in the oil introduction chamber 13b, that is, the amount of introduction oil, can be changed easily and quickly. That is, the oil 17 can easily and quickly flow between the inside of the oil introduction chamber 13 b and the inside of the oil pan 10. As a result, the height of the reservoir oil level can be adjusted easily and quickly.

  Next, operation | movement of the lubricating device 1 of embodiment is demonstrated.

  When the oil 17 is circulated between the oil pan 10 and the lubricated part 20 at the lower limit use temperature, the oil pan 10 is supplied with an amount of oil 17 in which the height of the reservoir oil level is equal to the lower use oil level. Inject. That is, when the volume of the oil introduction chamber 13b is the minimum at the use lower limit temperature, the oil 17 can circulate between the oil pan 10 and the lubricated part 20, and the height of the reservoir oil level is the use lower limit oil. An amount of oil 17 equal to the surface level is poured into the oil pan 10. When the volume of the oil introduction chamber 13b is the minimum at the use lower limit temperature, the oil 17 can circulate between the oil pan 10 and the lubricated part 20, and the oil level of the storage part is the lower limit use oil level. When the engine of the vehicle is driven in a state where an amount of oil 17 equal to the oil is injected into the oil pan 10, in the lubricating device 1, the reservoir oil is pumped from the oil pan 10 by the pump 11a, and the hydraulic control circuit It is supplied to the lubricated part 20 and the controlled object 30 via the part 11b. At this time, each valve inside the hydraulic control circuit unit 11b, in this embodiment, each solenoid valve is controlled by the hydraulic control circuit unit 11b in accordance with an instruction from the ECU so that the lubricated portion 20 and the control target are controlled. The pressure of the oil 17 supplied to 30 is controlled. By the way, when the oil 17 is supplied to the lubricated part 20 by the pump 11a and the hydraulic control circuit unit 11b, a part of the oil 17 temporarily remains in the lubricated part 20 to lubricate the lubricated part 20. The oil 17 supplied to the lubricated part 20 by the pump 11a and the hydraulic control circuit part 11b of the supply part 11 is returned to the oil pan 10 by the return pipe 12 by its own weight. That is, the oil 17 circulates between the oil pan 10 and the lubricated part 20 and is repeatedly supplied to the lubricated part 20.

  Here, when the temperature of the oil 17 that circulates between the oil pan 10 and the lubricated portion 20, that is, when the temperature of the reservoir oil is equal to or lower than the lower limit temperature, the contracting member 15a does not contract and the piston 14 The piston return spring 15b is biased toward the oil introduction chamber 13b and remains in interference with the piston stopper 13c of the cylinder 13, and the piston 14 does not slide inside the cylinder 13. That is, when the temperature of the reservoir oil is equal to or lower than the use lower limit temperature, the volume of the oil introduction chamber 13b remains at the minimum. At this time, if the supply amount, which is the amount of oil 17 supplied to the lubricated portion 20 by the pump 11a and the hydraulic control circuit portion 11b of the supply portion 11, is constant, the oil 17 returned to the oil pan 10 by the return pipe 12 The return amount Q, which is the amount of, does not change. Therefore, the oil 17 that circulates between the oil pan 10 and the lubricated part 20, that is, the reservoir amount that is the amount of the reservoir oil, is the oil 17 between the oil pan 10 and the lubricated part 20 at the use lower limit temperature. The amount obtained by removing the holding amount, which is the amount of the oil 17 that temporarily stays in the lubricated portion 20, from the amount in which the height of the reservoir oil level becomes equal to the use lower limit oil level, The amount of the oil 17 injected into the lubricating device 1 is kept constant as it is, excluding the holding amount that becomes a constant amount below the lower limit temperature of use. That is, the height of the reservoir oil level is maintained at the use lower limit oil level.

  In addition, when the temperature of the oil 17 circulating between the oil pan 10 and the lubricated part 20, that is, the temperature of the reservoir oil rises from the use lower limit temperature, the viscosity of the oil 17 decreases. For this reason, the amount of retained oil that temporarily remains in the lubricated portion 20, that is, the amount of retained oil retained in the lubricated portion 20, is that of the oil 17 that circulates between the oil pan 10 and the lubricated portion 20. As the temperature rises from the lower limit temperature of use, the viscosity of the retained oil decreases and decreases. Therefore, if the supply amount, which is the amount of oil 17 supplied to the lubricated portion 20 by the pump 11a and the hydraulic control circuit portion 11b of the supply portion 11, is constant, it circulates between the oil pan 10 and the lubricated portion 20. The return amount Q is increased by the return pipe 12 as the temperature of the oil 17 to be increased rises from the lower limit temperature. As a result, the amount of stored oil increases as the temperature of the oil 17 circulating between the oil pan 10 and the lubricated part 20, that is, the storage part oil rises from the lower limit temperature of use. The height tries to rise. That is, as the temperature of the reservoir oil rises, the retained amount decreases and the reserve amount increases, and the height of the reservoir oil level tends to increase.

  At this time, in the lubricating device 1, the piston 14 starts from the position where the piston oil 13 interferes with the piston stopper 13 c by the contraction member 15 a of the actuator 15 as the temperature of the reservoir oil rises from the lower limit use temperature. The volume of the oil introduction chamber 13b is increased by sliding to the side and decreasing the volume V of the oil non-introduction chamber 13a. That is, the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil can be changed following the change of the return amount Q with respect to the temperature change of the reservoir oil. Thus, the reservoir oil is introduced into the oil introduction chamber 13b by the amount that the volume of the oil introduction chamber 13b increases as the temperature of the reservoir oil rises from the lower limit temperature. That is, the amount of change in the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil, that is, the amount of change of the introduced oil can be matched with the amount of change in the return amount Q with respect to the temperature change of the reservoir oil. Further, as described above, out of the oil 17 supplied to the lubricated part 20 by the pump 11a and the hydraulic control circuit part 11b of the supply unit 11, the oil 17 temporarily remains in the lubricated part 20, that is, in the lubricated part 20. The retained amount, which is the amount of retained oil that is retained, decreases as the temperature of the reservoir oil increases from the lower limit temperature of use, so that the return amount Q increases as the temperature of the reservoir oil increases from the lower limit of use temperature. To increase. Here, since the cylinder 13 is not exposed from the stored oil 17, that is, is positioned below the reservoir oil level that is the oil level of the reservoir oil, the volume of the oil pan 10 below the reservoir oil level. The below-oil level storage part volume includes the oil non-introduction chamber 13a in which the storage part oil is not introduced. By the way, as described above, when the volume of the oil introduction chamber 13b increases as the temperature of the reservoir oil increases, the volume of the oil non-introduction chamber 13a decreases. That is, when the return amount Q increases as the temperature of the reservoir oil increases, the increase in the return amount Q is introduced into the decrease in the oil non-introduction chamber 13a. As a result, the increase in the return amount Q that increases as the temperature of the reservoir oil rises from the lower limit temperature of use is absorbed by the oil non-introduction chamber 13a, and among the reservoir oil below the reservoir oil level, The actual storage amount that is the amount of the actual storage portion oil excluding the introduced oil introduced into the oil introduction chamber 13b does not vary. Therefore, the fluctuation | variation of the height of a storage part oil surface can be suppressed. That is, even if the temperature of the reservoir oil changes, the height of the reservoir oil level can be kept constant at the use lower limit oil level.

  Further, in the lubricating device 1, the storage volume below the oil level includes the volume V of the oil non-introduction chamber 13a into which the reservoir oil is not introduced, so that the volume of the oil introduction chamber 13b is minimum, that is, the oil non-introduction chamber 13a. In the state where the volume V of the oil is maximum and the actual storage amount is minimum and the oil 17 is circulated between the oil pan 10 and the lubricated part 20, the supply part 11 is at the use lower limit temperature. The amount of oil 17 that can be used as the lower-limit reservoir oil level that is the reservoir oil level that can supply the reservoir oil to the lubricated part 20 by the pump 11a and the hydraulic control circuit unit 11b is stored in the oil reservoir. However, regardless of the temperature of the reservoir oil, the oil 17 is circulated between the oil pan 10 and the lubricated portion 20 while keeping the height of the reservoir oil level constant at the lower limit oil level. Can Kill. That is, the usage amount, which is the amount of oil 17 used by the lubricating device 1, is the height of the reservoir oil level that is the oil level in the oil pan 10 as the oil reservoir when the volume of the oil introduction chamber 13 b is minimum. Only the amount of oil 17 that is equal to the lower limit oil level is required. Therefore, compared with the case where the oil non-introduction chamber 13a is provided outside the oil pan 10, for example, the amount of oil used can be reduced in order to maintain the use lower limit reservoir oil level. For this reason, for example, compared with the case where the oil non-introducing chamber 13 a is provided outside the oil pan 10, the weight of the lubricating device 1 when the oil 17 is injected can be reduced, and the lubricating device 1 is injected. Since the total heat capacity of the oil 17 that is applied can be reduced, the warming-up performance of the lubricating device 1 can be improved.

  Further, the actuator 15 that slides the piston 14 into the cylinder 13 does not have to be electrically operated, so that the device cost can be reduced.

  In this embodiment, the actuator 15 is composed of the contracting member 15a and the piston return spring 15b. However, the present invention is not limited to this. Hereinafter, modified examples of the lubricating device according to this embodiment will be described.

  FIG. 4 is a schematic diagram showing an outline of a modification of the lubricating device according to the above-described embodiment. As shown in FIG. 4, the lubrication apparatus 1 uses the extension member 15c instead of the contraction member 15a, and uses the piston guide spring 15d instead of the piston return spring 15b, so that the actuator 15 includes the extension member 15c and the piston. The guide spring 15d may be used. Hereinafter, the extension member 15c and the piston guide spring 15d will be described.

  The extension member 15c is connected to both the cylinder 13 and the piston 14 in the oil introduction chamber 13b. In this modification, one end of the extension member 15c is fixed to the piston stopper 13c of the cylinder 13, and one end of the extension member 15c is fixed to the cylinder 13 via the piston stopper 13c. On the other hand, in this modification, the other end portion of the extending member 15c is fixed to the surface of the piston 14 facing the oil introduction chamber 13b. In this modified example, the extension member 15c is connected to both the cylinder 13 and the piston 14 as described above. Such an extension member 15c is made of a material that expands as the temperature of the introduced oil in the oil introduction chamber 13b increases, that is, a material that expands as the temperature of the reservoir oil increases. The extension member 15c contracts as the temperature of the reservoir oil, that is, the temperature of the oil introduced into the oil introduction chamber 13b decreases. In this modification, the extending member 15c is made of a shape memory alloy. In addition, the extending member 15c may be made of bimetal.

  The piston guide spring 15d is connected to both the cylinder 13 and the piston 14 so as to extend beyond the natural length. In this modification, the piston guide spring 15d is disposed in the oil non-introduction chamber 13a. In this modification, one end portion of the piston induction spring 15d is fixed to the side wall of the oil pan 10, so that one end portion of the piston induction spring 15d is fixed to the cylinder 13 via the side wall of the oil pan 10. Yes. On the other hand, in this modification, the other end of the piston guide spring 15d is fixed to the surface of the piston 14 facing the non-oil introduction chamber 13a. In this modification, as described above, the piston induction spring 15d is connected to both the cylinder 13 and the piston 14, and urges the piston 14 toward the oil non-introducing chamber 13a. The piston guide spring 15d may be connected to both the cylinder 13 and the piston 14 by being contracted to a natural length while being disposed in the oil introduction chamber 13b.

  Here, in this embodiment, the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil can be changed following the change in the return amount Q of the oil 17 with respect to the temperature change of the reservoir oil. The force for sliding the piston 14 by the extension member 15c and the force for sliding the piston 14 by the piston induction spring 15d are set in consideration of the force for sliding the piston 14 by the extension member 15c and the piston induction spring 15d. is doing. More specifically, here, the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil can be changed following the change of the return amount Q with respect to the temperature change of the reservoir oil. The storage portion of the extension member 15c so that the piston 14 slides by a distance in the axial direction obtained by dividing the change amount of the return amount with respect to the temperature change of the oil by the area value of the surface of the piston 14 facing the oil introduction chamber 13b. The contraction force with respect to the oil temperature and the spring constant of the piston induction spring 15d are set in consideration of the extension force with respect to the temperature of the reservoir oil in the extension member 15c and the biasing force to the piston 14 by the piston induction spring 15d. . For example, when the temperature of the reservoir oil is equal to or lower than the lower limit temperature, the extension member 15c is contracted in the axial direction, and at least used as the temperature of the reservoir oil rises from the lower limit temperature of use. Until the upper limit temperature is reached, a material that extends in the axial direction, in other words, a material that contracts as the temperature of the reservoir oil decreases, may be applied. Further, the piston induction spring 15d is a spring having a length that is not less than a natural length when the volume of the oil introduction chamber 13b is maximum, that is, when the volume of the oil non-introduction chamber 13a is minimum, and the piston 14 What is necessary is just to apply what has a spring constant that the magnitude | size of the urging | biasing force given to piston 14 becomes smaller than the magnitude | size of the contraction force of the contraction member 15a, when is located in the predetermined position of an axial direction.

  Further, the lubricating device 1 may be modified as follows. Hereinafter, another modified example of the lubricating device according to this embodiment will be described.

  FIG. 5 is a graph showing the relationship between the volume V of the oil non-introducing chamber 13 a and the return amount Q of the oil 17 with respect to the temperature of the oil 17. In the lubricating device 1 according to the embodiment described above, the change amount of the introduced oil is made to coincide with the change amount of the return amount Q with respect to the temperature change of the reservoir oil, but the present invention is not limited to this. In the present invention, the piston 14 is operated by the actuator 15 so that the amount of change in the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil is smaller than the amount of change in the return amount Q of the oil 17 with respect to the temperature change of the reservoir oil. You may set the force which slides. More specifically, here, the change amount of the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil is contracted so as to be smaller than the change amount of the return amount Q of the oil 17 with respect to the temperature change of the reservoir oil. You may set the contraction force with respect to the temperature of the storage part oil of the member 15a, and the spring constant of the piston return spring 15b. Hereinafter, for convenience of explanation, the volume of the oil non-introducing chamber 13a at this time is V ′. In addition, the graph shown to (a) in FIG. 5 is the same as the graph shown to (a) in FIG.

  Here, as shown in FIG. 5B, the volume V ′ of the oil non-introduction chamber 13a is larger than the volume V of the oil non-introduction chamber 13a of FIG. In this case, the distance is shorter than the distance in the axial direction obtained by dividing the change amount of the return amount with respect to the temperature change of the reservoir oil by the value of the area of the surface of the piston 14 facing the oil introduction chamber 13b. The contraction force with respect to the temperature of the reservoir oil of the contraction member 15a and the spring constant of the piston return spring 15b may be set so that the piston 14 slides.

  Here, the temperature of the oil 17 that circulates between the oil pan 10 and the lubricated part 20, that is, the case where the temperature of the reservoir oil is equal to or lower than the use lower limit temperature is the same as in the above-described embodiment.

  Further, when the temperature of the oil 17 circulating between the oil pan 10 and the lubricated part 20, that is, when the temperature of the reservoir oil rises from the use lower limit temperature, the temperature is maintained as the temperature of the reservoir oil rises. The amount of storage increases as the amount decreases, and the height of the reservoir oil level tends to increase, as in the previous embodiment.

  However, in this modification, the amount of change in the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil is smaller than the amount of change in the return amount Q of the oil 17 with respect to the temperature change of the reservoir oil. Here, the piston 14 slides a distance shorter than the distance in the axial direction obtained by dividing the amount of change of the return amount with respect to the temperature change of the reservoir oil by the value of the area of the surface of the piston 14 facing the oil introduction chamber 13b. Thus, the point which sets the contraction force with respect to the temperature of the storage part oil of the contraction member 15a and the spring constant of the piston return spring 15b is different from the above-mentioned embodiment. Shrinkage so that the piston 14 slides a distance shorter than the distance in the axial direction obtained by dividing the change amount of the return amount with respect to the temperature change of the reservoir oil by the area value of the surface of the piston 14 facing the oil introduction chamber 13b. When the contraction force of the member 15a with respect to the temperature of the reservoir oil and the spring constant of the piston return spring 15b are set, even if the temperature of the reservoir oil changes, the amount of change in the volume of the oil introduction chamber 13b becomes the return amount Q. Therefore, the height of the reservoir oil level can be adjusted to increase as the temperature of the reservoir oil increases. For this reason, when the temperature of the reservoir oil becomes higher than the lower limit temperature of use, when the oil 17 is circulated between the oil pan 10 and the lubricated portion 20 at the lower limit temperature of use, the oil level of the reservoir Even if only an amount of the oil 17 whose amount is equal to the lower limit oil level is used, the height of the reservoir oil level is not less than the height of the lower limit reservoir oil level. That is, even if only the oil usage 17 corresponding to the lower limit storage oil level is injected into the lubrication device 1, in the normal state, that is, when the temperature of the storage section oil exceeds the lower limit use temperature, The height of the oil level is not less than the oil level of the lower limit reservoir. Therefore, for example, even when the reservoir oil level locally fluctuates during vehicle turning or vehicle acceleration / deceleration, the height of the reservoir oil level is less than the height of the use lower limit reservoir oil level. Can be suppressed. Thereby, the performance of the lubricating device 1 can be maintained.

  As described above, in the above-described embodiment and its modifications, the reservoir oil is supplied to the lubricated part 20 and the controlled object 30 by the driving force of the pump 11a. However, the present invention is not limited to this. . The present invention may use a gear that is arranged in the oil pan 10 instead of the pump 11a and whose outer peripheral portion is always positioned below the reservoir oil level. More specifically, a configuration may be adopted in which the oil is stored in the portion to be lubricated 20 or the control target 30 by the gear rotating up the storage portion oil as the gear rotates. Thus, in the case of the configuration in which the oil 17 is supplied to the lubricated part 20 and the controlled object 30 by the lifting force by the gear, the fluctuation in the height of the reservoir oil level is suppressed as described above. The portion of the gear immersed in the oil 17 does not expand. For this reason, an increase in stirring loss can be prevented. Moreover, since the fluctuation | variation of the height of a storage part oil surface is suppressed as mentioned above, since the part immersed in the oil 17 of a gear does not expand, the increase in the amount of oil 17 scraped up by a gear is suppressed, It is possible to prevent so-called oil blowing such that the oil 17 blows out from the gas-liquid separating breather provided in the transmission 2.

  Further, in the above-described embodiment and its modification, it is possible to change the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil following the change of the return amount Q with respect to the temperature change of the reservoir oil. In addition, the force that slides the piston 14 by the contraction member 15a and the force that slides the piston 14 by the piston return spring 15b, or the force that slides the piston 14 by the extension member 15c and the piston induction spring 15d cause the piston 14 to slide. Although the force to be moved is set, the present invention is not limited to this. In the present invention, the piston 14 is slid by the actuator 15 so that the volume of the oil introduction chamber 13b with respect to the temperature change of the reservoir oil can be changed following the change of the return amount Q with respect to the temperature change of the reservoir oil. What is necessary is just to set at least any one of the force to move, or the area of the part exposed to the oil introduction chamber 13b of piston 14, For example, in the above-mentioned embodiment and its modification, oil introduction of piston 14 is carried out. The area of the part facing the chamber 13b may be set.

  In the above-described embodiment and its modification, the lubrication apparatus 1 includes the breather 16. However, the present invention is not limited to this, and the breather 16 may be omitted from the lubrication apparatus 1.

  In the above-described embodiment and its modification, the contraction member 15a and the piston return spring 15b, or the extension member 15c and the piston induction spring 15d, that is, a non-electric actuator is used as the actuator 15. The invention is not limited to this. In the present invention, for example, instead of using a contraction member 15a and a piston return spring 15b, or a non-electric actuator such as an extension member 15c and a piston induction spring 15d as the actuator 15, 14 may be slid inside the cylinder 13. More specifically, for example, the actuator 15 includes a motor, a rack and pinion mechanism, and a temperature sensor that detects the temperature of the reservoir oil. One end of the rack is disposed in the oil non-introduction chamber 13a. The pinion connected to the piston 14 and meshed with the rack may be rotated by the driving force of the motor according to the detection result by the temperature sensor. Thus, even when the piston 14 is slid by the electric actuator 15, the same effects as those of the above-described embodiment and its modification can be obtained.

  Further, in the embodiment and the modifications thereof, the oil 17 is circulated between the oil pan 10 and the lubricated portion 20, but the present invention is not limited to this. In the present invention, for example, when the amount of oil 17 supplied to the control target 30 by the pump 11a and the hydraulic control circuit unit 11b of the supply unit 11 is relatively large, between the control target 30 and the oil pan 10, for example, Return means such as a return pipe may be provided so that the oil 17 supplied to the controlled object 30 by the pump 11a and the hydraulic control circuit unit 11b of the supply unit 11 is returned to the oil pan 10 by its own weight. That is, the present invention may be configured to circulate the oil 17 not only between the oil pan 10 and the lubricated part 20 but also between the oil pan 10 and the controlled object 30.

  As described above, the lubrication apparatus according to the present invention is useful for lubricating the lubricated portion of the vehicle, and particularly useful for lubricating the operation of the members constituting the transmission for the vehicle.

It is a schematic diagram which shows the outline of the lubricating device which concerns on embodiment. It is a schematic diagram which shows the outline of a lubricating device when oil temperature rises. It is a graph which shows the relationship between the volume of the oil non-introduction chamber with respect to the temperature of oil, and the return amount of oil. It is a schematic diagram which shows the outline of the modification of a lubricating device. It is a graph which shows the relationship between the volume of the oil non-introduction chamber with respect to the temperature of oil, and the return amount of oil.

Explanation of symbols

1 Lubricating device 10 Oil pan (oil reservoir)
11 Supply section (supply means)
11a Pump 11b Hydraulic control circuit section 12 Return pipe (return means)
13 cylinder 13a oil non-introduction chamber 13b oil introduction chamber 13c piston stopper 14 piston 15 actuator 15a contraction member 15b piston return spring 15c extension member 15d piston induction spring 16 breather 17 oil 20 lubricated part Q return amount V volume of oil non-introduction chamber

Claims (7)

An oil reservoir for storing oil;
Supply means for supplying the stored oil to the lubricated part;
Return means for returning the oil supplied to the lubricated part to the oil storage part;
A lubricating device comprising:
A cylinder provided in the oil reservoir without being exposed from the stored oil;
An oil introduction chamber that is slidable in the axial direction inside the cylinder and that opens inside the cylinder in the axial direction to the oil reservoir, and oil in which the stored oil does not enter A piston that is divided into a non-introducing chamber;
An actuator that is interposed between the cylinder and the piston and slides the piston toward the oil non-introducing chamber as the temperature of the stored oil rises;
A lubrication apparatus comprising: A breather for communicating the inside of the oil non-introduction chamber and the outside of the oil reservoir;
The lubricating device according to claim 1, wherein: Following the change in the return amount of the oil returned to the oil reservoir with respect to the temperature change of the stored oil, the volume of the oil introduction chamber can be changed with respect to the temperature change of the stored oil. As described above, at least one of a force for sliding the piston by the actuator or an area of a portion of the piston exposed in the oil introduction chamber is set.
The lubricating device according to claim 1 or 2, wherein The actuator causes the change amount of the volume of the oil introduction chamber with respect to the temperature change of the stored oil to be smaller than the change amount of the return amount of the oil with respect to the temperature change of the stored oil. Setting at least one of the force of sliding the piston or the area of the exposed portion of the piston in the oil introduction chamber;
The lubricating device according to any one of claims 1 to 3, wherein When the temperature of the oil stored in the oil storage part is equal to or lower than the use lower limit temperature, the volume of the oil introduction chamber is minimized.
The lubricating device according to any one of claims 1 to 4, wherein The actuator is
A contracting member that is connected to both the cylinder and the piston in the oil non-introducing chamber and is made of a material that contracts as the temperature of the stored oil rises;
A piston return spring coupled to both the cylinder and the piston and biasing the piston toward the oil introduction chamber;
Composed of,
The lubricating device according to any one of claims 1 to 5, wherein The actuator is
An extension member that is connected to both the cylinder and the piston in the oil introduction chamber and is made of a material that expands as the temperature of the stored oil rises;
A piston induction spring connected to both the cylinder and the piston, and biasing the piston toward the oil non-introducing chamber;
Composed of,
The lubricating device according to any one of claims 1 to 5, wherein

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