CN210484221U - Pressure accumulator arrangement - Google Patents

Abstract

The utility model discloses a mode of accumulator device has: a body portion attached to an attached body; an accumulator connected to the oil passage; an electromagnetic valve that controls the flow of oil in the oil passage; and a check valve disposed in the oil passage. The electromagnetic valve has: a movable member; and a valve unit disposed in the oil passage and opened and closed in accordance with movement of the movable member. The oil path has: an inlet into which oil flows; an outlet for discharging oil; an input oil passage connecting the inlet and the valve portion and connected to the accumulator; and an output oil passage connecting the valve portion and the outlet. The input oil passage and the output oil passage are different flow passages. The input oil passage has a connection portion connected to the accumulator. The check valve is disposed in a portion of the input oil passage between the connection portion and the inlet, allows oil to flow from the inlet to the valve portion or the accumulator, and prevents oil from flowing from the valve portion or the accumulator to the inlet.

Description

Pressure accumulator arrangement

Technical Field

The utility model relates to an accumulator device.

Background

An accumulator capable of accumulating hydraulic pressure is known. For example, patent document 1 describes an accumulator mounted on a vehicle drive device.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-145635

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

For example, it is conceivable to unitize the accumulator and a solenoid valve that switches between pressure accumulation in the accumulator and pressure release from the accumulator. However, simply combining the accumulator and the solenoid valve has a problem that the structure of the unit becomes complicated and the unit is easily enlarged.

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

Means for solving the problems

The utility model discloses a mode of accumulator device has: a body portion attached to an attached body and having an oil passage therein; an accumulator connected to the oil passage; an electromagnetic valve that controls a flow of oil in the oil passage; and a check valve disposed in the oil passage, the solenoid valve including: a movable element that moves in a predetermined direction; and a valve portion disposed in the oil passage and opened and closed in accordance with movement of the movable element in the predetermined direction, the oil passage including: an inlet into which oil flows; an outlet for discharging oil; an input oil passage that connects the inlet and the valve portion and is connected to the accumulator; and an output oil passage that connects the valve portion and the outlet connection, the input oil passage and the output oil passage being different flow passages from each other, the input oil passage having a connection portion that connects with the accumulator, the check valve being disposed in a portion of the input oil passage between the connection portion and the inlet, allowing the oil to flow from the inlet to the valve portion or the accumulator, and preventing the oil from flowing from the valve portion or the accumulator to the inlet.

Effect of the utility model

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

Drawings

Fig. 1 is a perspective view showing an accumulator apparatus according to embodiment 1.

Fig. 2 is a view showing an accumulator device according to embodiment 1, and is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a view of the accumulator device of embodiment 1 as viewed from the lower side.

Fig. 4 is a view showing an accumulator device according to embodiment 1, and is a sectional view taken along line IV-IV of fig. 2.

Fig. 5 is a view showing an accumulator device according to embodiment 1, and is a sectional view taken along line V-V of fig. 1.

Fig. 6 is a sectional view showing a state where the accumulator of embodiment 1 is pressurized.

Fig. 7 is a perspective view showing an accumulator apparatus of embodiment 2.

Detailed Description

In an XYZ coordinate system shown in the drawings as appropriate, the X-axis direction is a front-back direction X in which a positive side is a front side and a negative side is a back side. The Y-axis direction is a left-right direction Y perpendicular to the front-back direction X and having a positive side as a left side and a negative side as a right side. The Z-axis direction is a vertical direction Z perpendicular to both the front-back direction X and the left-right direction Y, and having a positive side as an upper side and a negative side as a lower side. In addition, for a certain object, a side closer to the center of the accumulator device 10 in the left-right direction Y may be referred to as "inner side in the left-right direction Y", and a side farther from the center of the accumulator device 10 in the left-right direction Y may be referred to as "outer side in the left-right direction Y".

The front-back 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 only names for explaining the relative positional relationship of the respective portions, and the actual positional relationship and the like may be positional relationships other than the positional relationship and the like indicated by the names.

< embodiment 1 >

In the present embodiment, the front-rear direction X corresponds to the predetermined direction and the 1 st direction. The left-right direction Y corresponds to the 2 nd direction. The vertical direction Z corresponds to the 3 rd direction. The upper side corresponds to the 3 rd direction side.

The accumulator device 10 of the present embodiment shown in fig. 1 is provided, for example, in a control valve CV of an automatic transmission of a vehicle. The control valve CV is a mounted body. As shown in fig. 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 unit formed by unitizing the accumulator 30 and the solenoid valve 40. As shown in fig. 1, in the present embodiment, the plurality of accumulators 30 includes a pair of accumulators 30A and 30B adjacent to each other in the left-right direction Y.

The pair of accumulators 30A and 30B have the same configuration except that the arrangement positions are different and the accumulators are symmetrically arranged in the left-right direction Y. In the following description, the accumulator 30A and the accumulator 30B are simply referred to as the accumulator 30 without particularly distinguishing them.

The body 20 is mounted on a control valve CV as a mounted body. As shown in fig. 2, the body 20 has a base 21 and a projection 22. As shown in fig. 3, the base 21 has a base main body 21a and four mounting portions 21 b. The base body 21a has a substantially rectangular shape when viewed from below. The attachment portions 21b project outward in the left-right direction Y from both ends in the front-rear direction X of the base main body 21 a. As shown in fig. 1 and 4, the mounting portion 21b is fixed by screwing a screw, which is inserted through a hole penetrating the mounting portion 21b in the vertical direction Z, into the control valve CV. Thereby, the accumulator device 10 is fixed to the control valve CV.

The lower surface of the base body 21a and the lower surface of the mounting portion 21b are disposed on the same plane perpendicular to the vertical direction Z, and constitute the lower surface of the base 21. The lower surface of the base 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 20b 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.

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

The body 20 has an oil passage 20a therein. The oil passage 20a has a part of the above-described concave portion 23, an inlet 26, an outlet 27, an input oil passage 24, and an output oil passage 25. The inlet 26 is a port into which the oil O flows from the 1 st port IP of the control valve CV. The outlet 27 is a port for discharging the oil O to the 2 nd port OP of the control valve CV.

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

As shown in fig. 2, the input oil path 24 has a 1 st portion 24a and a 2 nd portion 24 b. As shown in fig. 4, the 1 st portion 24a extends upward from the inlet 26 through the pair of accumulators 30A, 30B to each other. That is, the input oil passage 24 passes between a pair of accumulators 30A, 30B adjacent in the left-right direction Y. The inner peripheral surface of the 1 st portion 24a is cylindrical and extends in the vertical direction Z. As shown in fig. 2, the 1 st portion 24a is provided at the end of the front side of the body 20. That is, the input oil passage 24 is provided at the front end of the body 20.

The 1 st portion 24a has an opening 24c at an upper end. The opening 24c is closed by the plug 60. For example, a male screw portion provided on the outer peripheral surface of the plug 60 is screwed into a female screw portion provided on the inner peripheral surface of the upper end of the 1 st part 24a, thereby fixing the plug 60 in the 1 st part 24 a.

The 1 st segment 24a has a connection portion 24e, and the connection portion 24e is connected to the accumulator 30 at a position above the inlet 26. That is, the input oil passage 24 has a connection portion 24 e. 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. Thereby, the input oil passage 24 is connected to the plurality of accumulators 30. The 1 st segment 24a has a seat portion 24d, and in the seat portion 24d, the inner diameter of the 1 st segment 24a is reduced toward the inlet 26 side (i.e., lower side) in the vertical direction Z. The seat portion 24d is located below the connecting portion 24 e.

As shown in fig. 2, the 2 nd portion 24b extends rearward from a portion below the opening 24c and above the connection portion 24e of the 1 st portion 24 a. The rear end of the 2 nd portion 24b opens to the lower portion of the bottom surface of the small-diameter recess 23 b. The inner peripheral surface of the 2 nd portion 24b is cylindrical and extends in the front-rear direction X. The input oil passage 24 connects the inlet 26 to a valve portion 43, which will be described later, via the small-diameter recess portion 23 b.

The output oil passage 25 extends upward from the outlet 27. The upper end 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. Thereby, the output oil passage 25 connects the valve portion 43 and the outlet 27. The inner circumferential surface of the output oil passage 25 is cylindrical and extends in the vertical direction Z. The output oil passage 25 is provided in a portion of the body 20 on the front side of the rear end. Therefore, compared to the case where the output oil passage 25 is provided at the rear end portion of the body portion 20, the oil passage 20a can be made smaller in the front-rear direction X, and the accumulator device 10 as a whole can be made smaller in the front-rear direction X easily. In the present embodiment, the output oil passage 25 is provided at 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 30A, 30B adjacent in the left-right direction Y. The input oil passage 24 and the output oil passage 25 are different passages from each other.

As shown in fig. 1, the plurality of accumulators 30, i.e., the pair of accumulators 30A and 30B, extend in the front-rear direction X and are arranged in the left-right direction Y perpendicular 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 each other on both sides of the 1 st portion 24a in the left-right direction Y. A 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 has an outer tube portion 31, a fixing portion 32, a pressure receiving portion 33, an O-ring 34, and compression coil springs 35a, 35 b.

The outer tube 31 is a bottomed cylindrical shape extending in the front-rear direction X. The outer tube portion 31 is open to the rear side. The outer cylinder 31 of the accumulator 30A is centered on the 2 nd center axis J2. The outer cylinder 31 of the accumulator 30B is centered on the 3 rd center axis J3. The outer tube portion 31 is a part of the body portion 20, and is provided as a separate member together with the base portion 21 and the protruding portion 22. In the present embodiment, the outer cylinder 31 of the accumulator 30A and the outer cylinder 31 of the accumulator 30B are connected at the inner ends in the left-right direction Y.

As shown in fig. 1 and 4, since the outer tube 31 is cylindrical, a V-shaped groove 38 that opens upward is provided between the upper ends of the outer tubes 31 of the pair of accumulators 30A, 30B in the left-right direction Y.

As shown in fig. 5, the fixing portion 32 is a bottomed cylindrical shape open to the front side. The fixing portion 32 is fitted to the rear end portion in the outer tube portion 31. The fixing portion 32 is supported from the rear side by, for example, a C-ring 37 and held in the outer tube portion 31, and the C-ring 37 is fitted into a groove provided in the inner circumferential surface 31a of the outer tube portion 31. The fixing portion 32 has a vent hole 32a penetrating through the bottom of the fixing portion 32 in the front-rear direction X. The vent hole 32a connects the outside and the inside of the accumulator 30.

The pressure receiving portion 33 is a bottomed cylindrical shape open to the rear side. The pressure receiving portion 33 is disposed movably in the front-rear direction X in a portion located on the front side of the fixing portion 32 in the outer tube portion 31. The central portion of the bottom of the pressure receiving portion 33 is a contact portion 33a that protrudes forward beyond the outer edge portion of the bottom of the pressure receiving portion 33. The front end surface of the contact portion 33a can contact the bottom surface of the outer cylinder 31.

A reservoir space 36 for storing the oil O is provided between the outer edge portion of the bottom of the pressure receiving portion 33 and the bottom surface of the outer tube portion 31. The storage space 36 is connected to the connection portion 24 e. Specifically, as shown in fig. 4, the end portion of the storage space 36 on the inner side in the left-right direction Y overlaps and is connected to the end portion of the connection portion 24e on the outer side in the left-right direction Y. Thereby, the plurality of accumulators 30 are connected to the oil passage 20a (i.e., the input oil passage 24 in the present embodiment). The oil O flows into the storage space 36 via the connection portion 24 e.

As shown in fig. 5, an 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 31a of the outer cylindrical portion 31. This can suppress the oil O flowing into the reservoir space 36 from leaking into the portion of the inside of the outer tube 31 located on the rear side of the reservoir space 36.

The compression coil springs 35a, 35b extend in the front-rear direction X. The compression coil springs 35a and 35b are disposed between the fixing portion 32 and the pressure receiving portion 33 in the front-rear direction X. The rear end portions of the compression coil springs 35a and 35b are inserted into the fixing portion 32 and contact the bottom surface of the fixing portion 32. The front end portions of the compression coil springs 35a and 35b 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 fixing portion 32, i.e., a forward elastic force, to the pressure receiving portion 33. The inner diameter of the compression coil spring 35a is larger than the outer diameter of the compression coil spring 35 b. The compression coil spring 35b is inserted inside the compression coil spring 35 a.

The electromagnetic valve 40 shown in fig. 2 controls the flow of the oil O in the oil passage 20 a. The electromagnetic valve 40 has a solenoid portion 41, a movable member 42, and a valve portion 43. The solenoid portion 41 includes an outer cylinder portion 41a and a solenoid portion main body, not shown, housed in the outer cylinder portion 41 a. That is, the solenoid valve 40 has an outer cylinder portion 41a and a solenoid portion main body. The outer tube portion 41a is cylindrical and extends in the front-rear direction X about a 1 st central axis J1 extending in the front-rear direction X. The outer tube 41a is open to the front side. The outer tube 41a is disposed above the base 21. The rear end of the outer tube 41a is located at substantially the same position as the rear end of the base 21 and the rear end 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 portion 41. In the present embodiment, the mover 42 is a columnar pin centered on the 1 st central axis J1. The valve portion 43 protrudes forward from the solenoid portion 41. The valve portion 43 has a nozzle member 44, a valve chamber member 45, and a valve body 46.

The nozzle member 44 is a columnar member extending in the front-rear direction X about the 1 st central axis J1. The nozzle member 44 is fitted in the recess 23. Thus, the valve portion 43 is disposed on the oil passage 20 a. The nozzle member 44 has a large diameter portion 44a and a small diameter portion 44 b. The large diameter portion 44a is a portion fixed to a front surface of the solenoid portion 41. The large-diameter portion 44a is fitted in the large-diameter recess 23 a. The large diameter portion 44a has a through hole 44c penetrating the large diameter portion 44a in the front-rear direction X. The movable element 42 passes through the through hole 44 c.

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

The nozzle member 44 has an outflow oil passage 44e penetrating the nozzle member 44 in the vertical direction Z. The outflow passage 44e is located between the large diameter portion 44a and the small diameter portion 44b in the front-rear direction X. The lower end of the outflow 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 in the front-rear direction X of the nozzle member 44. The valve chamber member 45 is cylindrical and opens to both sides in the front-rear direction X. The rear opening of the valve chamber member 45 opens into the through hole 44 c. The inlet port 45a, which is an opening on the front side of the valve chamber member 45, opens into the through hole 44 d. The valve chamber member 45 has an outlet 45b that penetrates downward from the inner peripheral surface of the valve chamber member 45 to the outer peripheral surface of the valve chamber member 45. The outlet port 45b opens to the outlet oil passage 44 e. The valve body 46 is housed inside the valve chamber member 45. The valve body 46 is a ball. The front end of the movable member 42 can contact the valve body 46.

The valve portion 43 opens and closes in accordance with the movement of the movable element 42 in the front-rear direction X. In a state where the valve portion 43 is open, the oil O flowing from the input oil passage 24 into the small-diameter recess 23b flows into the valve chamber member 45 through the through hole 44d and the inlet port 45a, and flows from the outlet port 45b to the output oil passage 25 through the outlet oil passage 44 e. Thus, the oil O flowing into the input oil passage 24 from the inlet 26 flows into the output oil passage 25, and flows out from the outlet 27.

On the other hand, when the movable element 42 is moved forward by the urging force of the solenoid portion 41 from the state where the valve portion 43 is opened, the valve body 46 is pushed forward by the movable element 42, and the valve body 46 closes the inflow port 45 a. This closes the valve portion 43. In a state where the valve portion 43 is closed, the oil O flowing from the input oil passage 24 into the small-diameter recess 23b does not flow into the valve chamber member 45, and flow to the output oil passage 25 is prevented. The state shown in fig. 2 is a state in which the valve portion 43 is closed.

As described above, the movable piece 42 of the solenoid valve 40 moves in the same direction as the direction in which the plurality of accumulators 30 extend. The direction in which the movable element 42 moves is easily the longitudinal direction of the solenoid valve 40. Therefore, the plurality of accumulators 30 and the solenoid valves 40 are easily arranged in a state in which the longitudinal directions thereof are aligned. The plurality of accumulators 30 are arranged in a direction perpendicular to the extending direction. Thus, for example, the plurality of accumulators 30 and the plurality of solenoid valves 40 can be arranged in a concentrated manner with good space efficiency, compared to a case where the longitudinal direction of the accumulator 30 and the longitudinal direction of the solenoid valves 40 are oriented in different directions and a case where the plurality of accumulators 30 are arranged in a row in the extending direction.

Further, since the plurality of accumulators 30 are provided, when the sum of the capacities of the entire accumulators 30 is the same, the capacity of one accumulator 30 can be reduced as compared with the case where only one accumulator 30 is provided, and each accumulator 30 can be downsized. By arranging the small-sized accumulator 30 with good space efficiency as described above, the entire accumulator apparatus 10 can be easily made smaller than a case where one large-sized accumulator is arranged. As described above, according to the present embodiment, the accumulator apparatus 10 is obtained which is compact and large in capacity while unitizing the plurality of accumulators 30 and the solenoid valves 40.

In the present embodiment, the front-rear direction X and the left-right direction Y are directions along the lower surface 20b 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 arranged are the direction along the lower surface 20b of the body 20. Therefore, in the control valve CV, the accumulator device 10 can be downsized in the direction perpendicular to the surface on which the lower surface 20b is fixed, i.e., the vertical direction Z. Thus, when the accumulator device 10 is fixed to the control valve CV, the accumulator device 10 can be prevented from greatly extending from the control valve CV.

As shown in fig. 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 at a position overlapping in the vertical direction Z with both of the pair of accumulators 30A and 30B adjacent to each other in the left-right direction Y. Therefore, the accumulator device 10 can be made smaller in the left-right direction Y than in the case where the solenoid valve 40 and the pair of accumulators 30A, 30B are arranged in the left-right direction Y. In the present embodiment, the solenoid valve 40 is disposed above the accumulator 30. As shown in fig. 3 and 4, the solenoid valve 40 is disposed in the center between the pair of accumulators 30A and 30B in the left-right direction Y.

As shown in fig. 4, a part of the solenoid valve 40 is inserted inside the V-shaped groove 38. Thus, a part of the solenoid valve 40 is sandwiched between the pair of accumulators 30A, 30B in the left-right direction Y, and is disposed at a position overlapping both of the pair of accumulators 30A, 30B in the left-right direction Y. Therefore, as described above, the solenoid valve 40 is disposed so as to overlap the pair of accumulators 30A and 30B in the vertical direction Z, and the solenoid valve 40 is disposed so as to be close to the accumulators 30A and 30B in the vertical direction Z by the V-shaped groove 38 generated between the pair of accumulators 30A and 30B.

Therefore, the accumulator device 10 can be downsized in the vertical direction Z. As described above, in the present embodiment, the pair of accumulators 30A and 30B and the solenoid valve 40 can be arranged in a concentrated manner with higher space efficiency, and the accumulator apparatus 10 can be downsized in both the left-right direction Y and the up-down direction Z. In the present embodiment, a part of the solenoid valve 40 inserted into the V-shaped groove 38 is an end portion on the lower side of the outer cylinder 41 a.

Further, according to the present embodiment, since the solenoid valve 40 is disposed above the accumulator 30, the dimension of the accumulator device 10 in the left-right direction Y can be easily increased toward the side fixed to the control valve CV, that is, the lower side. This makes it easy to stably fix the accumulator device 10 to the control valve CV.

In the present embodiment, since the plurality of accumulators 30 and the solenoid valves 40 have the cylindrical outer cylinder portions 31 and 41a extending in the front-rear direction X, respectively, the V-shaped grooves 38 between the plurality of accumulators 30 in the left-right direction Y are easily enlarged, and a part of the solenoid valves 40, that is, the lower end portion of the outer cylinder portion 41a is easily inserted into the V-shaped grooves 38. Therefore, as described above, the pair of accumulators 30A and 30B and the solenoid valve 40 are easily arranged in a concentrated manner with higher space efficiency by the V-shaped groove 38. The outer cylinders 31 and 41a may have a polygonal tubular shape, for example.

The check valve 50 is disposed in the oil passage 20 a. More specifically, the check valve 50 is disposed in a portion of the input oil passage 24 between the connection portion 24e and the inlet 26. In the present embodiment, the portion of the input oil path 24 between the connection portion 24e and the inlet 26 refers to the following portion in the 1 st portion 24 a: this portion is located between the connection portion 24e in the up-down direction Z and the inlet 26. The check valve 50 allows the oil O to flow from the inlet 26 to the valve portion 43 or the accumulator 30, and prevents the oil O from flowing from the valve portion 43 or the accumulator 30 to the inlet 26. Therefore, the check valve 50 can prevent the oil O flowing into the input oil passage 24 from flowing backward to the inlet 26. The check valve 50 may prevent the oil O flowing into the accumulator 30 through the connection portion 24e from flowing backward to the inlet 26.

The check valve 50 includes the valve seat portion 24d, a valve body 51, and an elastic member 52. The valve body 51 is, for example, a sphere. The valve body 51 is disposed movably in the vertical direction Z at a position closer to the valve portion 43 side, i.e., above the valve seat portion 24d in the 1 st section 24 a. The valve body 51 can close the 1 st portion 24a by fitting into the valve seat portion 24 d. Fig. 2 and 4 show a state in which the valve body 51 is fitted into the seat portion 24d to close the 1 st portion 24 a.

When the oil O flows in from the inlet 26, the valve body 51 is pushed up from the seat portion 24d by the hydraulic pressure of the oil O, and the 1 st part 24a is opened. On the other hand, when the oil O is about to flow backward to the inlet 26, the valve body 51 is pressed against the valve seat portion 24d by the hydraulic pressure of the oil O, and the 1 st segment 24a is closed. As described above, according to the present embodiment, the check valve 50 can be configured with a simple structure.

The elastic member 52 is, for example, a compression coil spring extending in the up-down direction Z. The elastic member 52 is disposed in the 1 st portion 24 a. The elastic member 52 is located between the valve body 51 and the plug 60 in the vertical direction Z. The upper end of the elastic member 52 contacts the lower surface of the plug 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 of pressing the valve body 51 against the valve seat portion 24d, that is, in a downward direction in the present embodiment. This can maintain the valve body 51 at the inlet 26 side of the connection portion 24e in the 1 st part 24 a. Therefore, the valve body 51 can be prevented from moving toward the opening 24c side of the connection portion 24e in the 1 st portion 24a, and the backflow of the oil O in the accumulator 30 to the inlet 26 can be prevented.

In the present embodiment, since the 1 st part 24a has the opening 24c, the check valve 50 can be easily inserted into the 1 st part 24a from the opening 24 c. Thus, the check valve 50 can be easily disposed in the 1 st part 24a by inserting the valve body 51 and the elastic member 52 into the 1 st part 24a through the opening 24c before the opening 24c is closed by the plug 60, and then closing the opening 24c by the plug 60.

When the oil O flows into the 1 st portion 24a of the input oil passage 24 from the inlet 26, the valve body 51 is pushed up against the elastic force of the elastic member 52 by the hydraulic pressure of the inflowing oil O, and the 1 st portion 24a is opened. Then, the oil O flowing into the 1 st portion 24a flows from the connecting portion 24e into the storage space 36, or flows from the 2 nd portion 24b into the valve portion 43 via the small-diameter concave portion 23 b.

Here, when the valve portion 43 is in the closed state, the oil O in the input oil passage 24 does not flow to the output oil passage 25, and therefore, when the oil O continues to flow into the input oil passage 24, the hydraulic pressure in the input oil passage 24 increases. As a result, as shown in fig. 6, the oil O further flows into the reservoir space 36, the hydraulic pressure of the oil O in the reservoir space 36 also rises, and the pressure receiving portion 33 is pushed and moved rearward by the hydraulic pressure of the oil O. This increases the volume of the storage space 36, and increases the amount of oil O stored in the storage space 36. The compression coil springs 35a and 35b are compressed by the movement of the pressure receiving portion 33 to the rear side. Thereby, the pressure of the oil O in the reservoir space 36 is accumulated in the accumulator 30 by the pressure receiving portion 33.

On the other hand, when the valve portion 43 is in the open state, the oil O in the input oil passage 24 flows out from the outlet 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 reservoir space 36 to the input oil passage 24 through the connection portion 24e, and flows out from the outlet 27 through the valve portion 43 and the output oil passage 25. Thus, the relatively high-pressure oil O pressurized by the pressure accumulated in the accumulator 30 can be discharged from the outlet 27 until the state in which the coil springs 35a and 35b are compressed returns to the state shown in fig. 5.

In the case where the accumulator and the solenoid valve are combined into the accumulator device as in the present embodiment, the structure of the accumulator device may be complicated, and the accumulator device may be easily increased in size. Specifically, for example, when the same oil passage is used as the input oil passage and the output oil passage, the check valve or the like needs to be switched between the inflow time and the outflow time, which may complicate the accumulator device.

In contrast, according to the present embodiment, since the input oil passage 24 and the output oil passage 25 are different passages, the flow of the oil O as described above can be realized only by disposing the check valve 50 in the input oil passage 24. This can simplify the structure of the oil passage 20a and the structure of the accumulator device 10. Therefore, according to the present embodiment, the accumulator device 10 in which the accumulator 30 and the solenoid valve 40 are unitized and which has a simple structure can be obtained. This facilitates downsizing of the accumulator device 10.

In addition, 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, 30B adjacent in the left-right direction Y. Therefore, the entire length of the oil passage 20A is easily shortened as compared with a case where both of the input oil passage 24 and the output oil passage 25 do not pass through between the pair of accumulators 30A, 30B. In the present embodiment, both the input oil passage 24 and the output oil passage 25 pass between the pair of accumulators 30A, 30B, and therefore the overall length of the oil passage 20A can be easily further shortened.

In addition, according to the present embodiment, the 1 st portion 24a of the input oil passage 24 having the connection portion 24e passes between the pair of accumulators 30A, 30B, whereby the oil O in the input oil passage 24 flows from the connection portion 24e to both sides in the left-right direction Y and is supplied to at least the pair of accumulators 30A, 30B. This makes it possible to easily flow the oil O in the input oil passage 24 into the reservoir space 36 of the accumulators 30A and 30B. In the present embodiment, since a part of the connection portion 24e overlaps a part of the reservoir space 36, the oil O flowing through the input oil passage 24 more easily flows into the reservoir space 36 of the accumulator 30. For example, when three or more pressure 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 may flow to 3 or more pressure accumulators 30.

The present invention is not limited to the above embodiment, and other structures may be adopted. The plurality of pressure accumulators 30 may be arranged to be offset from each other in the front-rear direction X. The plurality of pressure accumulators 30 may be arranged to be shifted from each other in the vertical direction Z. The plurality of accumulators 30 may be arranged in parallel along the extending direction, i.e., the front-rear direction X in the present embodiment. The plurality of accumulators 30 may extend in different directions from each other. In addition, 3 or more accumulators 30 may be provided. The volumes of the plurality of accumulators 30 may be the same or different from each other. In addition, only one accumulator 30 may be provided. The structure of the accumulator 30 is not particularly limited, and any known accumulator may be used. The accumulator 30 may be configured to compress a gas such as nitrogen gas, for example, instead of the compression coil springs 35a and 35 b.

The solenoid valve 40 may be disposed at the same position as the plurality of accumulators 30 in the vertical direction Z. For example, the solenoid valve 40 and the accumulators 30 may be arranged in the left-right direction Y. The solenoid valve 40 may be disposed at a position overlapping 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. The predetermined direction in which the movable element 42 of the solenoid valve 40 moves may be different from the 1 st direction in which the accumulator 30 extends. The structure of the solenoid valve 40 is not particularly limited, and any known solenoid valve may be used.

The input oil passage 24 is not particularly limited as long as it is a passage different from the output oil passage 25, which connects the inlet 26 and the valve portion 43 and is connected to the accumulator 30. The output oil passage 25 is not particularly limited as long as it is a passage different from the input oil passage 24 and connects the valve portion 43 and the outlet 27. The structure of the check valve 50 is not particularly limited.

< embodiment 2 >

In the present embodiment, the front-rear direction X corresponds to the 3 rd direction. The left-right direction Y corresponds to the 2 nd direction. The vertical direction Z corresponds to a predetermined direction and the 1 st direction.

As shown in fig. 7, in the accumulator device 110 of the present embodiment, a pair of accumulators 130A and 130B extend in the vertical direction Z. The outer cylinder 131 opens to the upper side. The movable member of the solenoid valve 140 moves in the up-down direction Z. In the present embodiment, the 1 st central axis J1, the 2 nd central axis J2, and the 3 rd central axis J3 extend in the vertical direction Z.

In the present embodiment, the 1 st direction, that is, the direction in which the accumulators 130A and 130B extend and the direction in which the movable element of the solenoid valve 140 moves are directions intersecting the lower surface 120B of the body 120. In this case, it is easy to reduce the area of the lower surface 120b of the body 120 compared to embodiment 1. Therefore, even when the mounting area of the accumulator unit 110 on the control valve CV is small, the accumulator unit 110 can be easily mounted on the control valve CV. In the present embodiment, the 1 st direction is perpendicular to the lower surface 120 b.

The shape of the accumulator device 110 of the present embodiment is substantially the same as the shape of the accumulator device 10 of embodiment 1 rotated by 90 ° in the posture in which the front surface of the accumulator device 10 is the lower surface.

The use of the accumulator device of each of the above embodiments is not particularly limited. In addition, the above structures may be appropriately combined within a range not inconsistent with each other.

The present application claims to cite all the description contents described in japanese patent application No. 2017-058589, which is a japanese patent application applied 24/3/2017, based on the priority of the application.

Description of the reference symbols

10. 110: an accumulator arrangement; 20. 120: a body portion; 20 a: an oil path; 24: an input oil path; 24 a: part 1; 24 c: an opening part; 24 d: a valve seat portion; 24 e: a connecting portion; 25: an output oil path; 26: an inlet; 27: an outlet; 30. 30A, 30B, 130A: an accumulator; 40. 140: an electromagnetic valve; 42: a movable member; 43: a valve section; 46. 51: a valve body; 50: a check valve; 52: an elastic member; 60: a plug body; CV: a control valve (mounted body); o: and (3) oil.

Claims (6)

1. An accumulator arrangement, characterized in that,

the accumulator device comprises:

a body portion attached to an attached body and having an oil passage therein;

an accumulator connected to the oil passage;

an electromagnetic valve that controls a flow of oil in the oil passage; and

a check valve disposed in the oil passage,

the electromagnetic valve has:

a movable element that moves in a predetermined direction; and

a valve portion disposed in the oil passage and opened and closed in accordance with movement of the movable element in the predetermined direction,

the oil passage has:

an inlet into which oil flows;

an outlet for discharging oil;

an input oil passage that connects the inlet and the valve portion and is connected to the accumulator; and

an output oil passage connecting the valve portion and the outlet,

the input oil passage and the output oil passage are different flow passages from each other,

the input oil passage has a connection portion connected to the accumulator,

the check valve is disposed in a portion of the input oil path between the connection portion and the inlet, allows the oil to flow from the inlet to the valve portion or the accumulator, and prevents the oil from flowing from the valve portion or the accumulator to the inlet.

2. An accumulator arrangement according to claim 1,

the accumulator is provided with a plurality of the pressure accumulators,

the plurality of pressure accumulators extend in a 1 st direction and are arranged in a 2 nd direction perpendicular to the 1 st direction,

at least one of the input oil passage and the output oil passage passes between a pair of the accumulators adjacent in the 2 nd direction.

3. An accumulator arrangement according to claim 2,

the input oil passage has a 1 st portion that extends from the inlet to a side of a 3 rd direction perpendicular to both the 1 st direction and the 2 nd direction across a pair of the accumulators,

the 1 st part has the connecting part at a position closer to the 3 rd direction than the inlet,

the oil in the input oil passage flows from the connecting portion to both sides in the 2 nd direction and is supplied to at least one pair of the accumulators.

4. An accumulator arrangement according to claim 3,

the check valve is disposed in the following portion of the 1 st portion: which is located between said connection in said 3 rd direction and said inlet,

the 1 st portion has an opening portion at an end portion on one side in the 3 rd direction,

the opening is closed by a plug body.

5. An accumulator arrangement according to claim 4,

the check valve has:

a valve seat portion in which an inner diameter of the 1 st portion becomes smaller toward the inlet side in the 3 rd direction; and

and a valve body that is disposed so as to be movable in the 3 rd direction at a position closer to the valve portion side than the valve seat portion in the 1 st portion, and that is fitted in the valve seat portion so as to be able to close the 1 st portion.

6. An accumulator arrangement according to claim 5,

the check valve has an elastic member disposed in the 1 st section,

the elastic member applies an elastic force to the valve body in a direction of pressing the valve seat portion.

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