WO2018173878A1

WO2018173878A1 - Accumulator device

Info

Publication number: WO2018173878A1
Application number: PCT/JP2018/009928
Authority: WO
Inventors: 純板倉; 大輔村田; 慶多小林
Original assignee: 日本電産トーソク株式会社
Priority date: 2017-03-24
Filing date: 2018-03-14
Publication date: 2018-09-27
Also published as: CN210484221U; JP7014220B2; JPWO2018173878A1

Abstract

One embodiment of the accumulator device of the present invention is equipped with: a body attached to an attachment target; an accumulator linked to an oil passage; an electromagnetic valve for controlling the flow of the oil inside the oil passage; and a check valve positioned in the oil passage. The electromagnetic valve has a movable part and a valve part which is positioned in the oil passage and opens and closes according to the movement of the movable part. The oil passage has an intake port through which oil enters, a discharge port through which oil is discharged, an input oil passage which connects the intake port and the valve part and is connected to the accumulator, and an output oil passage which connects the valve part and the discharge port. The input oil passage and the output oil passage are separate passages. The input oil passage has a connecting part which is connected to the accumulator. The check valve is positioned in a section constituting part of the input oil passage and located between the intake port and the connecting part, and is configured so as to allow the flow of oil from the intake port to the valve part or to the accumulator, and prevent the flow of oil to the intake port from the valve part or the accumulator.

Description

Accumulator device

The present invention relates to an accumulator device.

ア Accumulators that can store hydraulic pressure are known. For example, Patent Document 1 describes an accumulator mounted on a vehicle drive device.

JP-A-2016-145635

For example, it is conceivable to unitize the accumulator as described above and a solenoid valve that switches between accumulator pressure accumulation and release of the accumulated pressure. However, when the accumulator and the solenoid valve are simply combined, there is a problem that the structure of the unit is complicated and the unit tends to be large.

In view of the above circumstances, an object of the present invention is to provide an accumulator device that includes an accumulator and a solenoid valve and has a simple structure.

One aspect of the accumulator device of the present invention includes an oil passage inside, a body attached to a body to be attached, an accumulator connected to the oil passage, and an electromagnetic valve that controls the flow of oil in the oil passage. A check valve disposed in the oil passage, and the electromagnetic valve is disposed in the oil passage and is opened and closed as the mover moves in the predetermined direction. And the oil passage is an import oil into which oil flows in, an outport for discharging oil, an input oil passage that connects the import and the valve portion, and an input oil passage that leads to the accumulator, An output oil passage that connects the valve portion and the outport, and the input oil passage and the output oil passage are different flow paths from each other, and the input oil passage is connected to the accumulator. Has a connecting part, front A check valve is disposed in a portion of the input oil passage located between the connecting portion and the import, allows the oil to flow from the import to the valve portion or the accumulator, and the valve Block the flow of oil from the section or the accumulator to the import.

According to one aspect of the present invention, an accumulator device including an accumulator and a solenoid valve and having a simple structure is provided.

FIG. 1 is a perspective view showing the accumulator device of the first embodiment. FIG. 2 is a view showing the accumulator device of the first embodiment and is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a diagram of the accumulator device according to the first embodiment viewed from below. FIG. 4 is a view showing the accumulator device of the first embodiment and is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a view showing the accumulator device of the first embodiment, and is a cross-sectional view taken along line VV in FIG. FIG. 6 is a cross-sectional view showing a state where the accumulator of the first embodiment is accumulated. FIG. 7 is a perspective view showing an accumulator device according to the second embodiment.

In the XYZ coordinate system shown as appropriate in each drawing, the X-axis direction is the front-rear direction X with the positive side as the front side and the negative side as the rear side. The Y-axis direction is a left-right direction Y that is orthogonal to the front-rear direction X, with the positive side on the left and the negative side on the right. The Z-axis direction is a vertical direction Z that is orthogonal to both the front-rear direction X and the left-right direction Y and that has the positive side as the upper side and the negative side as the lower side. In addition, for a certain object, a side near the center of the accumulator device 10 in the left-right direction Y may be referred to as “inside of the left-right direction Y”, and a side far from the center of the accumulator device 10 in the left-right direction Y It may be called “outside of Y”.

The front-rear direction, the left-right direction, the up-down direction, the front side, the rear side, the right side, the left side, the upper side, and the lower side are simply names for explaining the relative positional relationship of each part. An arrangement relationship other than the arrangement relationship indicated by these names may be used.

<First Embodiment>
In the present embodiment, the front-rear direction X corresponds to a predetermined direction and a first direction. The left-right direction Y corresponds to the second direction. The vertical direction Z corresponds to the third direction. The upper side corresponds to one side in the third direction.

1 is provided in a control valve CV of an automatic transmission of a vehicle, for example. The control valve CV is an attached body. As shown in FIGS. 1 and 2, the accumulator device 10 includes a body 20, a check valve 50, a solenoid valve 40, and a plurality of accumulators 30. That is, the accumulator device 10 is a device in which the accumulator 30 and the electromagnetic valve 40 are unitized. As shown in FIG. 1, in the present embodiment, the plurality of accumulators 30 include a pair of accumulators 30 A and 30 B adjacent in the left-right direction Y.

The pair of

accumulators

30A and 30B have the same configuration except that they are arranged at different positions and are arranged symmetrically in the left-right direction Y. In the following description, the accumulator 30 A and the accumulator 30 B are simply referred to as the accumulator 30 when they are not particularly distinguished from each other.

The body 20 is attached to a control valve CV as an attached body. As shown in FIG. 2, the body 20 includes a base portion 21 and a protruding portion 22. As shown in FIG. 3, the base 21 has a base body 21a and four attachment portions 21b. The shape of the base body 21a viewed from below is a substantially rectangular shape. The attachment portion 21b protrudes outward in the left-right direction Y from both ends in the front-rear direction X of the base body 21a. As shown in FIGS. 1 and 4, the mounting portion 21 b is fixed by tightening a screw passed through a hole penetrating the mounting portion 21 b in the vertical direction Z into the control valve CV. Thereby, the accumulator apparatus 10 is fixed to the control valve CV.

The lower surface of the base body 21 a and the lower surface of the mounting portion 21 b are arranged on the same plane orthogonal to the vertical direction Z, and constitute the lower surface of the base 21. The lower surface of the base portion 21 is a flat surface and is a surface along the front-rear direction X and the left-right direction Y. The lower surface of the base 21 is the lower surface 20 b of the body 20. In a state where the accumulator device 10 is fixed to the control valve CV, the lower surface 20b of the body 20 is fixed in contact with the control valve CV.

1 and 2, the protruding portion 22 is a portion protruding upward from the front portion of the base body 21a. As shown in FIG. 2, the protrusion 22 has a recess 23. The recess 23 is recessed forward from the rear surface of the protrusion 22. The cross-sectional shape orthogonal to the front-rear direction X of the recess 23 is, for example, a circular shape. The recess 23 has a large-diameter recess 23a and a small-diameter recess 23b. The large-diameter recess 23 a opens on the rear surface of the protrusion 22. The small diameter recess 23b is recessed forward from the bottom surface of the large diameter recess 23a. The inner diameter of the small diameter recess 23b is smaller than the inner diameter of the large diameter recess 23a.

The body 20 has an oil passage 20a inside. The oil passage 20 a includes a part of the recess 23 described above, an import 26, an outport 27, an input oil passage 24, and an output oil passage 25. The import 26 is a port through which oil O flows from the first port IP of the control valve CV. The out port 27 is a port for discharging the oil O to the second port OP of the control valve CV.

In the present embodiment, the import 26 and the outport 27 open on the lower surface 20b of the body 20. As shown in FIG. 3, the import 26 is disposed at the front end of the lower surface 20 b of the body 20 at the center in the left-right direction Y. The outport 27 is disposed at the center in the front-rear direction X at the center in the left-right direction Y on the lower surface 20 b of the body 20. The shape viewed from the lower side of the import 26 and the shape viewed from the lower side of the outport 27 are, for example, circular.

As shown in FIG. 2, the input oil passage 24 has a first portion 24a and a second portion 24b. As shown in FIG. 4, the first portion 24 a extends between the pair of accumulators 30 A and 30 B and extends upward from the import 26. That is, the input oil passage 24 passes between a pair of

accumulators

30A and 30B adjacent in the left-right direction Y. The inner peripheral surface of the first portion 24a has a cylindrical shape extending in the up-down direction Z. As shown in FIG. 2, the first portion 24 a is provided at the front end of the body 20. That is, the input oil passage 24 is provided at the front end of the body 20.

The first portion 24a has an opening 24c at the upper end. The opening 24 c is closed by the plug body 60. In the plug body 60, for example, a male screw portion provided on the outer peripheral surface of the plug body 60 is fastened to a female screw portion provided on the inner peripheral surface of the upper end portion of the first portion 24 a, so that the first Fixed in the portion 24a.

The first portion 24 a has a connection portion 24 e connected to the accumulator 30 above the import 26. That is, the input oil passage 24 has a connection portion 24e. As shown in FIG. 4, in the present embodiment, a pair of

accumulators

30A and 30B are connected to both sides of the connecting portion 24e in the left-right direction Y, respectively. As a result, the input oil passage 24 is connected to a plurality of accumulators 30. The first portion 24a has a valve seat portion 24d in which the inner diameter of the first portion 24a decreases toward the import 26 in the vertical direction Z, that is, toward the lower side. The valve seat portion 24d is located below the connection portion 24e.

As shown in FIG. 2, the second portion 24b extends below the opening 24c in the first portion 24a and extends rearward from a portion above the connection portion 24e. The rear end portion of the second portion 24b opens to the lower portion of the bottom surface of the small diameter concave portion 23b. The inner peripheral surface of the second portion 24b has a cylindrical shape extending in the front-rear direction X. The input oil passage 24 connects the import 26 and a later-described valve portion 43 through the small-diameter concave portion 23b.

The output oil passage 25 extends upward from the outport 27. The upper end portion of the output oil passage 25 opens to the inner peripheral surface of the large-diameter recess 23a and is connected to a valve portion 43 described later. As a result, the output oil passage 25 connects the valve portion 43 and the outport 27. The inner peripheral surface of the output oil passage 25 has a cylindrical shape extending in the vertical direction Z. The output oil passage 25 is provided in a portion on the front side of the rear end portion of the body 20. Therefore, compared with the case where the output oil passage 25 is provided at the rear end of the body 20, the oil passage 20a can be reduced in size in the front-rear direction X, and the entire accumulator device 10 can be easily reduced in size in the front-rear direction X. In the present embodiment, the output oil passage 25 is provided in the center of the body 20 in the front-rear direction X. As shown in FIG. 3, the output oil passage 25 passes between a pair of accumulators 30 A and 30 B adjacent in the left-right direction Y. The input oil path 24 and the output oil path 25 are different flow paths from each other.

As shown in FIG. 1, a plurality of accumulators 30, that is, a pair of accumulators 30 A and 30 B, extend in the front-rear direction X and are arranged side by side in the left-right direction Y orthogonal to the front-rear direction X. As shown in FIG. 4, in the present embodiment, the pair of

accumulators

30A and 30B are disposed adjacent to both sides in the left-right direction Y of the first portion 24a. The plurality of accumulators 30 are held on the base 21. As shown in FIG. 5, the position of the accumulator 30A in the front-rear direction X is the same as the position of the accumulator 30B in the front-rear direction X. The accumulator 30 includes an outer cylinder portion 31, a fixing portion 32, a pressure receiving portion 33, an O-ring 34, and

compression coil springs

35a and 35b.

The outer cylinder portion 31 has a bottomed cylindrical shape extending in the front-rear direction X. The outer cylinder part 31 opens to the rear side. The outer cylinder portion 31 of the accumulator 30A is centered on the second central axis J2. The outer cylinder portion 31 of the accumulator 30B is centered on the third central axis J3. The outer cylinder part 31 is a part of the body 20 and is provided as a single member with the base part 21 and the protruding part 22. In this embodiment, the outer cylinder part 31 of the accumulator 30A and the outer cylinder part 31 of the accumulator 30B are connected at the inner end in the left-right direction Y.

As shown in FIG. 1 and FIG. 4, since the outer cylinder part 31 is cylindrical, between the upper ends of the outer cylinder parts 31 of the pair of

accumulators

30A and 30B, a V opening opens upward. A groove 38 is provided.

As shown in FIG. 5, the fixing portion 32 has a bottomed cylindrical shape that opens to the front side. The fixed portion 32 is fitted to the rear end portion of the inside of the outer cylinder portion 31. The fixing part 32 is supported from the rear side by a C ring 37 fitted in a groove provided on the inner peripheral surface 31 a of the outer cylinder part 31 and is held in the outer cylinder part 31, for example. The fixing portion 32 has a vent hole 32 a that penetrates the bottom portion of the fixing portion 32 in the front-rear direction X. The ventilation hole 32 a connects the outside and the inside of the accumulator 30.

The pressure receiving portion 33 has a bottomed cylindrical shape that opens to the rear side. The pressure receiving portion 33 is arranged to be movable in the front-rear direction X at a portion located in front of the fixed portion 32 inside the outer cylinder portion 31. A central portion of the bottom portion of the pressure receiving portion 33 is a contact portion 33 a that protrudes forward from the outer edge portion of the bottom portion of the pressure receiving portion 33. The front end surface of the contact portion 33 a can contact the bottom surface of the outer cylinder portion 31.

Between the outer edge part of the bottom part of the pressure receiving part 33 and the bottom face of the outer cylinder part 31, the storage space 36 in which the oil O is stored is provided. The storage space 36 is connected to the connection portion 24e. Specifically, as illustrated in FIG. 4, the inner end portion in the left-right direction Y of the storage space 36 overlaps and is connected to the outer end portion in the left-right direction Y of the connection portion 24 e. Thereby, the some accumulator 30 is connected with the oil path 20a, ie, the input oil path 24 in this embodiment. Oil O flows into the storage space 36 via the connecting portion 24e.

As shown in FIG. 5, the O-ring 34 is attached to the outer peripheral surface of the pressure receiving portion 33. The O-ring 34 seals between the outer peripheral surface of the pressure receiving portion 33 and the inner peripheral surface 31 a of the outer cylinder portion 31. Thereby, it can suppress that the oil O which flowed into the storage space 36 leaks to the part located behind the storage space 36 among the insides of the outer cylinder part 31. FIG.

The

compression coil springs

35a and 35b extend in the front-rear direction X. The compression coil springs 35 a and 35 b are arranged between the fixed portion 32 and the pressure receiving portion 33 in the front-rear direction X. The rear end portions of the compression coil springs 35 a and 35 b are inserted into the fixed portion 32 and contact the bottom surface of the fixed portion 32. The front end portions of the compression coil springs 35 a and 35 b are inserted into the pressure receiving portion 33 and contact the bottom surface of the pressure receiving portion 33. The

compression coil springs

35a and 35b apply an elastic force in a direction away from the fixed portion 32 to the pressure receiving portion 33, that is, a forward elastic force. The inner diameter of the compression coil spring 35a is larger than the outer diameter of the compression coil spring 35b. The compression coil spring 35b is inserted into the compression coil spring 35a.

The electromagnetic valve 40 shown in FIG. 2 controls the flow of the oil O in the oil passage 20a. The electromagnetic valve 40 includes a solenoid part 41, a mover 42, and a valve part 43. The solenoid part 41 has an outer cylinder part 41a and a solenoid part main body (not shown) accommodated in the outer cylinder part 41a. That is, the solenoid valve 40 has an outer cylinder part 41a and a solenoid part body. The outer cylinder portion 41a has a cylindrical shape extending in the front-rear direction X around the first central axis J1 extending in the front-rear direction X. The outer cylinder part 41a opens to the front side. The outer cylinder portion 41 a is disposed on the upper side of the base portion 21. The rear end portion of the outer cylinder portion 41 a is in the same position as the rear end portion of the base portion 21 and the rear end portion of the accumulator 30 in the front-rear direction X.

The mover 42 moves in the front-rear direction X by the propulsive force received from the solenoid unit 41. In the present embodiment, the mover 42 is a cylindrical pin centered on the first central axis J1. The valve part 43 projects forward from the solenoid part 41. The valve unit 43 includes a nozzle member 44, a valve chamber member 45, and a valve body 46.

The nozzle member 44 has a cylindrical shape extending in the front-rear direction X about the first central axis J1. The nozzle member 44 is fitted into the recess 23. Thereby, the valve part 43 is arrange | positioned at the oil path 20a. The nozzle member 44 has a large diameter portion 44a and a small diameter portion 44b. The large diameter portion 44 a is a portion that is fixed to the front surface of the solenoid portion 41. The large diameter portion 44a is fitted into the large diameter concave portion 23a. The large diameter portion 44a has a through hole 44c that penetrates the large diameter portion 44a in the front-rear direction X. The mover 42 is passed through the through hole 44c.

The small diameter part 44b is a part connected to the front side of the large diameter part 44a. The outer diameter of the small diameter portion 44b is smaller than the outer diameter of the large diameter portion 44a. The small diameter portion 44b is fitted into the small diameter concave portion 23b. The small diameter portion 44b has a through hole 44d that penetrates the small diameter portion 44b in the front-rear direction X. The through hole 44d opens inside the small-diameter recess 23b and is connected to the input oil passage 24 via the small-diameter recess 23b.

The nozzle member 44 has an outflow oil passage 44e that penetrates the nozzle member 44 in the vertical direction Z. The spilled oil passage 44e is located in the front-rear direction X between the large diameter portion 44a and the small diameter portion 44b. The lower end of the spilled oil passage 44e is connected to the upper end of the output oil passage 25.

The valve chamber member 45 is embedded between the large diameter portion 44a and the small diameter portion 44b of the nozzle member 44 in the front-rear direction X. The valve chamber member 45 has a cylindrical shape that opens on both sides in the front-rear direction X. The rear opening of the valve chamber member 45 opens into the through hole 44c. An inflow port 45a which is an opening on the front side of the valve chamber member 45 opens into the through hole 44d. The valve chamber member 45 has an outflow port 45 b penetrating downward from the inner peripheral surface of the valve chamber member 45 to the outer peripheral surface of the valve chamber member 45. The outflow port 45b opens to the outflow oil passage 44e. The valve body 46 is accommodated in the valve chamber member 45. The valve body 46 is a sphere. The front end of the mover 42 can contact the valve body 46.

The valve portion 43 is opened and closed as the mover 42 moves in the front-rear direction X. In a state in which the valve portion 43 is open, the oil O that has flowed into the small-diameter recess 23b from the input oil passage 24 flows into the valve chamber member 45 through the through hole 44d and the inflow port 45a, and flows out from the outflow port 45b to the outflow oil passage 44e. To the output oil passage 25. As a result, the oil O flowing into the input oil passage 24 from the import 26 flows into the output oil passage 25 and flows out from the outport 27.

On the other hand, when the movable element 42 is moved forward by receiving a propulsive force from the solenoid part 41 from the state in which the valve part 43 is open, the movable element 42 pushes the valve element 46 forward, and the valve element 46 passes through the inlet 45a. Block. Thereby, the valve part 43 will be in the closed state. In the state where the valve portion 43 is closed, the oil O that has flowed into the small diameter recess 23 b from the input oil passage 24 does not flow into the valve chamber member 45 and is prevented from flowing into the output oil passage 25. The state shown in FIG. 2 is a state in which the valve portion 43 is closed.

As described above, the direction in which the mover 42 of the electromagnetic valve 40 moves is the same as the direction in which the plurality of accumulators 30 extend. The direction in which the mover 42 moves tends to be the longitudinal direction of the electromagnetic valve 40. Therefore, it is easy to arrange a plurality of accumulators 30 and electromagnetic valves 40 with their longitudinal directions aligned. In addition, the plurality of accumulators 30 are arranged side by side in a direction orthogonal to the extending direction. Thereby, for example, compared with the case where the longitudinal direction of the accumulator 30 and the longitudinal direction of the electromagnetic valve 40 face different directions, and when the plurality of accumulators 30 are arranged side by side in the extending direction, the plurality of accumulators 30 and The electromagnetic valves 40 can be arranged together in a space efficient manner.

Further, since a plurality of accumulators 30 are provided, when the total capacity of the accumulators 30 is the same, the capacity of each accumulator 30 can be reduced compared to the case where only one accumulator 30 is provided, and each accumulator 30 can be made smaller. Can be By arranging the downsized accumulator 30 in a space efficient manner as described above, the entire accumulator device 10 can be easily downsized as compared with the case where one large accumulator is arranged. As described above, according to the present embodiment, the accumulator 10 having a large capacity and a small size can be obtained while unitizing the plurality of accumulators 30 and the electromagnetic valves 40.

In the present embodiment, the front-rear direction X and the left-right direction Y are directions along the lower surface 20 b of the body 20. In other words, the direction in which the plurality of accumulators 30 extend and the direction in which the plurality of accumulators 30 are aligned are the directions along the lower surface 20 b of the body 20. Therefore, the accumulator device 10 can be downsized in the direction orthogonal to the surface to which the lower surface 20b is fixed in the control valve CV, that is, in the vertical direction Z. Thereby, when the accumulator apparatus 10 is fixed to the control valve CV, it is possible to suppress the accumulator apparatus 10 from protruding greatly from the control valve CV.

As shown in FIGS. 1 and 4, the solenoid valve 40 is disposed at a position shifted in the vertical direction Z with respect to the accumulator 30 and is also in the vertical direction with both of the pair of accumulators 30 A and 30 B adjacent in the left-right direction Y. Arranged at a position overlapping Z. Therefore, the accumulator device 10 can be downsized in the left-right direction Y as compared with the case where the electromagnetic valve 40 and the pair of

accumulators

30A, 30B are arranged in the left-right direction Y. In the present embodiment, the electromagnetic valve 40 is disposed on the upper side of the accumulator 30. As shown in FIGS. 3 and 4, the electromagnetic valve 40 is arranged in the center between the pair of accumulators 30 A and 30 B in the left-right direction Y.

As shown in FIG. 4, a part of the solenoid valve 40 is inserted into the V groove 38. Thus, a part of the electromagnetic valve 40 is sandwiched between the pair of

accumulators

30A and 30B in the left-right direction Y, and is disposed at a position overlapping both the pair of

accumulators

30A and 30B in the left-right direction Y. Therefore, as described above, the electromagnetic valve 40 is disposed so as to overlap with the pair of

accumulators

30A and 30B in the up-down direction Z, and the V-groove 38 generated between the pair of

accumulators

30A and 30B is used to 40 can be arranged close to the vertical direction Z with respect to the

accumulators

30A and 30B.

Therefore, the accumulator device 10 can be downsized in the vertical direction Z. In this way, in the present embodiment, the pair of

accumulators

30A, 30B and the electromagnetic valve 40 can be arranged together in a more space efficient manner, and the accumulator device 10 can be reduced in both the left-right direction Y and the up-down direction Z. Can be In the present embodiment, a part of the solenoid valve 40 inserted into the V groove 38 is the lower end portion of the outer cylinder portion 41a.

Further, according to the present embodiment, since the electromagnetic valve 40 is disposed on the upper side of the accumulator 30, the dimension in the left-right direction Y of the accumulator device 10 is increased toward the side fixed to the control valve CV, that is, the lower side. It's easy to do. Thereby, it is easy to fix the accumulator device 10 to the control valve CV stably.

Moreover, in this embodiment, since the some accumulator 30 and the solenoid valve 40 have the cylindrical

outer cylinder parts

31 and 41a each extended in the front-back direction X, V groove | channel 38 between the left-right directions Y of several accumulators 30 mutually. In addition, it is easy to insert a part of the electromagnetic valve 40, that is, the lower end of the outer cylinder portion 41a into the V-groove 38. Therefore, as described above, the pair of

accumulators

30A and 30B and the electromagnetic valve 40 can be arranged more efficiently and collectively using the V-groove 38. In addition, the

outer cylinder parts

31 and 41a may be a polygonal cylinder shape, for example.

The check valve 50 is disposed in the oil passage 20a. More specifically, the check valve 50 is disposed in a portion of the input oil passage 24 located between the connection portion 24e and the import 26. In the present embodiment, the portion located between the connecting portion 24e and the import 26 in the input oil passage 24 is a portion located between the connecting portion 24e and the import 26 in the first portion 24a. . The check valve 50 allows the flow of oil O from the import 26 to the valve portion 43 or the accumulator 30, and blocks the flow of oil O from the valve portion 43 or the accumulator 30 to the import 26. Therefore, the check valve 50 can prevent the oil O flowing into the input oil passage 24 from flowing back into the import 26. Further, the check valve 50 can prevent the oil O flowing into the accumulator 30 through the connecting portion 24e from flowing back into the import 26.

The check valve 50 includes the valve seat portion 24d, the valve body 51, and the elastic member 52 described above. The valve body 51 is, for example, a sphere. The valve body 51 is disposed so as to be movable in the vertical direction Z on the valve portion 43 side, that is, on the upper side of the valve seat portion 24d in the first portion 24a. The valve body 51 can close the first portion 24a by being fitted to the valve seat portion 24d. 2 and 4 show a state in which the valve body 51 is fitted into the valve seat portion 24d and the first portion 24a is closed.

When the oil O flows from the import 26, the valve body 51 is pushed upward from the valve seat portion 24d by the oil pressure of the oil O, and the first portion 24a is opened. On the other hand, when the oil O tends to flow backward into the import 26, the valve body 51 is pressed against the valve seat portion 24d by the oil pressure of the oil O, and the first portion 24a is closed. Thus, according to the present embodiment, the check valve 50 can be configured with a simple configuration.

The elastic member 52 is, for example, a compression coil spring extending in the vertical direction Z. The elastic member 52 is disposed in the first portion 24a. The elastic member 52 is located between the valve body 51 and the plug body 60 in the vertical direction Z. The upper end of the elastic member 52 contacts the lower surface of the plug body 60. The lower end of the elastic member 52 is in contact with the valve body 51. The elastic member 52 applies an elastic force to the valve body 51 in a direction in which the valve body 51 is pressed against the valve seat portion 24d, that is, downward in the present embodiment. Thereby, the valve body 51 can be maintained at a position closer to the import 26 than the connection portion 24e in the first portion 24a. Therefore, it is possible to suppress the valve body 51 from moving toward the opening 24c rather than the connection portion 24e in the first portion 24a, and to prevent the oil O in the accumulator 30 from flowing back to the import 26.

In the present embodiment, since the first portion 24a has the opening 24c, the check valve 50 can be easily inserted into the first portion 24a from the opening 24c. Thus, before the opening 24 c is closed by the plug 60, the valve body 51 and the elastic member 52 are inserted into the first portion 24 a from the opening 24 c, and then the opening 24 c is closed by the plug 60. Thus, the check valve 50 can be easily disposed in the first portion 24a.

When oil O flows from the import 26 into the first portion 24a of the input oil passage 24, the valve body 51 is pushed up against the elastic force of the elastic member 52 by the oil pressure of the oil O that has flowed in, and the first portion 24a is opened. Is done. And the oil O which flowed into the 1st part 24a flows into the valve part 43 via the storage space 36 from the connection part 24e, or the small diameter recessed part 23b from the 2nd part 24b.

Here, when the valve portion 43 is in a closed state, the oil O in the input oil passage 24 does not flow into the output oil passage 25, and therefore if the oil O continues to flow into the input oil passage 24, Increases hydraulic pressure. As a result, as shown in FIG. 6, the oil O further flows into the storage space 36, the oil pressure of the oil O in the storage space 36 also rises, and the pressure receiving portion 33 is pushed rearward by the oil pressure of the oil O. Move. Thereby, the volume of the storage space 36 is increased, and the oil O stored in the storage space 36 is increased. The

compression coil springs

35a and 35b are compressed by the pressure receiving portion 33 moving to the rear side. Thereby, the pressure which pushes the oil O in the storage space 36 through the pressure receiving part 33 is accumulated in the accumulator 30.

On the other hand, when the valve portion 43 is open, the oil O in the input oil passage 24 flows out from the outport 27 through the valve portion 43 and the output oil passage 25. At this time, if the pressure is accumulated in the accumulator 30, the oil O pushed by the elastic force of the

compression coil springs

35a and 35b flows from the storage space 36 to the input oil passage 24 through the connection portion 24e, and the valve portion 43 And flows out from the outport 27 via the output oil passage 25. As a result, the relatively high-pressure oil O pressurized by the pressure accumulated in the accumulator 30 can flow out from the outport 27 until the state of the

compression coil springs

35a and 35b returns to the state shown in FIG. .

When the accumulator and the electromagnetic valve are unitized as an accumulator device as in the present embodiment, the structure of the accumulator device may be complicated and the accumulator device may be easily enlarged. Specifically, for example, when the same oil passage is used as the input oil passage and the output oil passage, it is necessary to switch the check valve between inflow and outflow, and the accumulator device becomes complicated. There is a case.

On the other hand, according to the present embodiment, since the input oil passage 24 and the output oil passage 25 are separate passages, the oil as described above can be obtained only by arranging the check valve 50 in the input oil passage 24. It is possible to realize the flow of O. Thereby, the structure of the oil path 20a can be simplified and the structure of the accumulator apparatus 10 can be simplified. Therefore, according to the present embodiment, the accumulator device 10 having a simple structure can be obtained while the accumulator 30 and the electromagnetic valve 40 are unitized. Thereby, the accumulator device 10 can be easily downsized.

Further, according to the present embodiment, at least one of the input oil passage 24 and the output oil passage 25 passes between the pair of

accumulators

30A and 30B adjacent in the left-right direction Y. Therefore, compared with the case where both of the input oil passage 24 and the output oil passage 25 do not pass between the pair of

accumulators

30A and 30B, the total length of the oil passage 20a can be easily shortened. In this embodiment, since both of the input oil passage 24 and the output oil passage 25 pass between the pair of

accumulators

30A and 30B, the total length of the oil passage 20a can be easily shortened.

Further, according to the present embodiment, the first portion 24a of the input oil passage 24 having the connection portion 24e passes between the pair of

accumulators

30A and 30B, so that the oil O in the input oil passage 24 is connected. It flows from the portion 24e to both sides in the left-right direction Y and is supplied to at least a pair of

accumulators

30A and 30B. Thereby, the oil O in the input oil path 24 can be easily flowed into the storage space 36 of the

accumulators

30A and 30B. In the present embodiment, since a part of the connecting portion 24e overlaps with a part of the storage space 36, the oil O flowing in the input oil passage 24 is more likely to flow into the storage space 36 of the accumulator 30. For example, when three or more accumulators 30 are provided, the oil O in the input oil passage 24 may flow from the connection portion 24e to both sides in the left-right direction Y and to the three or more accumulators 30.

The present invention is not limited to the above-described embodiment, and other configurations can be adopted. The plurality of accumulators 30 may be shifted from each other in the front-rear direction X. The plurality of accumulators 30 may be arranged so as to be shifted in the vertical direction Z from each other. The plurality of accumulators 30 may be arranged side by side along the extending direction, that is, the front-rear direction X in the present embodiment. The extending directions of the plurality of accumulators 30 may be different from each other. Three or more accumulators 30 may be provided. The volumes of the plurality of accumulators 30 may be the same as each other or different from each other. Further, only one accumulator 30 may be provided. The configuration of the accumulator 30 is not particularly limited, and any known accumulator can be used. For example, the accumulator 30 may be configured to compress a gas such as nitrogen instead of the

compression coil springs

35a and 35b.

Further, the electromagnetic valve 40 may be arranged at the same position in the vertical direction Z with the plurality of accumulators 30. For example, the electromagnetic valve 40 and the plurality of accumulators 30 may be arranged side by side in the left-right direction Y. Further, the electromagnetic valve 40 may be disposed at a position overlapping with only one of the pair of

accumulators

30A and 30B in the vertical direction Z. The solenoid valve 40 may be disposed below the accumulator 30. Further, the predetermined direction in which the mover 42 of the electromagnetic valve 40 moves may be different from the first direction in which the accumulator 30 extends. The configuration of the solenoid valve 40 is not particularly limited, and any known solenoid valve may be used.

Also, the input oil passage 24 is not particularly limited as long as it connects the import 26 and the valve portion 43 and is connected to the accumulator 30 and is separate from the output oil passage 25. Moreover, the output oil path 25 will not be specifically limited if it connects the valve part 43 and the outport 27, and if the input oil path 24 and another flow path are connected. The configuration of the check valve 50 is not particularly limited.

Second Embodiment
In the present embodiment, the front-rear direction X corresponds to the third direction. The left-right direction Y corresponds to the second direction. The vertical direction Z corresponds to a predetermined direction and a first direction.

As shown in FIG. 7, in the accumulator device 110 of the present embodiment, the pair of accumulators 130 A and 130 B extend in the vertical direction Z. The outer cylinder part 131 opens upward. The mover of the electromagnetic valve 140 moves in the vertical direction Z. In the present embodiment, the first central axis J1, the second central axis J2, and the third central axis J3 extend in the vertical direction Z.

In the present embodiment, the first direction, that is, the direction in which the

accumulators

130A and 130B extend and the direction in which the mover of the electromagnetic valve 140 moves are directions that intersect the lower surface 120b of the body 120. In such a case, the area of the lower surface 120b of the body 120 can be easily reduced as compared with the first embodiment. Therefore, even when the attachment area of the accumulator device 110 in the control valve CV is small, it is easy to attach the accumulator device 110 to the control valve CV. In the present embodiment, the first direction is orthogonal to the lower surface 120b.

The accumulator device 110 according to the present embodiment has a shape substantially similar to the shape obtained by rotating the accumulator device 10 according to the first embodiment by 90 ° in a posture in which the front surface of the accumulator device 10 is a lower surface.

In addition, the use of the accumulator apparatus of each embodiment mentioned above is not specifically limited. Moreover, each structure mentioned above can be suitably combined in the range which is not mutually contradictory.

This application claims priority based on Japanese Patent Application No. 2017-058589 filed on Mar. 24, 2017, and incorporates all the content described in the Japanese Patent Application. is there.

DESCRIPTION OF SYMBOLS 10,110 ... Accumulator apparatus, 20,120 ... Body, 20a ... Oil passage, 24 ... Input oil passage, 24a ... First part, 24c ... Opening part, 24d ... Valve seat part, 24e ... Connection part, 25 ... Output oil Road, 26 ... Import, 27 ... Out port, 30, 30A, 30B, 130A ... Accumulator, 40, 140 ... Solenoid valve, 42 ... Mover, 43 ... Valve part, 46, 51 ... Valve body, 50 ... Check valve 52 ... Elastic member, 60 ... Plug body, CV ... Control valve (attached body), O ... Oil

Claims

A body having an oil passage inside and attached to the mounted body;
An accumulator connected to the oil passage;
A solenoid valve for controlling the flow of oil in the oil passage;
A check valve disposed in the oil passage;
With
The solenoid valve is
A mover that moves in a predetermined direction;
A valve portion that is disposed in the oil passage and is opened and closed as the mover moves in the predetermined direction;
Have
The oil passage is
The import of oil and
An outport that drains the oil;
An input oil passage that connects the import and the valve unit, and connects to the accumulator,
An output oil passage connecting the valve portion and the outport;
Have
The input oil path and the output oil path are different flow paths from each other,
The input oil passage has a connection portion connected to the accumulator,
The check valve is
Arranged in a portion located between the connection portion and the import in the input oil passage,
An accumulator device that allows the flow of oil from the import to the valve portion or the accumulator and prevents the flow of oil from the valve portion or the accumulator to the import.
A plurality of the accumulators are provided,
The plurality of accumulators extend in a first direction and are arranged side by side in a second direction orthogonal to the first direction,
2. The accumulator device according to claim 1, wherein at least one of the input oil path and the output oil path passes between a pair of accumulators adjacent in the second direction.
The input oil passage has a first portion extending between the pair of accumulators and extending from the import to one side in a third direction orthogonal to both the first direction and the second direction,
The first portion has the connecting portion on one side in the third direction from the import,
The accumulator device according to claim 2, wherein the oil in the input oil passage flows from the connection portion to both sides in the second direction and is supplied to at least the pair of accumulators.
The check valve is disposed in a portion of the first portion located between the connection portion and the import in the third direction;
The first portion has an opening at one end in the third direction,
The accumulator device according to claim 3, wherein the opening is closed by a plug.
The check valve is
A valve seat portion in which the inner diameter of the first portion decreases toward the import side in the third direction;
A valve body that is arranged so as to be movable in the third direction on the valve part side of the valve seat part in the first part, and is capable of closing the first part by being fitted to the valve seat part;
The accumulator device according to claim 4, comprising:
The check valve includes an elastic member disposed in the first portion;
The accumulator device according to claim 5, wherein the elastic member applies an elastic force in a direction in which the elastic member is pressed against the valve seat portion.