CN210715320U - Energy accumulator arrangement - Google Patents

Abstract

The utility model discloses an energy storage device of mode has: a body having an oil passage therein, the body being attached to an object to be attached; a plurality of accumulators connected to the oil passages; and an electromagnetic valve that controls the flow of oil in the oil passage. The electromagnetic valve has: a movable element that moves in a 1 st direction; and a valve unit disposed on the oil passage and configured to be opened and closed in accordance with movement of the movable element in the 1 st direction. The oil path has: an input port into which oil flows; an output port for discharging oil; an input oil passage that connects the input port with the valve portion and that connects with the plurality of accumulators; and an output oil passage connecting the valve portion and the output port. The accumulators extend in a 1 st direction and are arranged in parallel in a 2 nd direction perpendicular to the 1 st direction.

Description

Energy accumulator arrangement

Technical Field

The utility model relates to an energy storage device.

Background

Accumulators capable of accumulating hydraulic pressure are 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 as described above and a solenoid valve that switches between accumulation of the accumulator and release of the accumulated pressure. However, simply combining the accumulator and the solenoid valve makes the unit easily large. In addition, in the accumulator as described above, it is desired to increase the capacity of the accumulator, but when the capacity of the accumulator is simply increased, the accumulator is likely to be increased in size, and the unit is likely to be increased in size. Therefore, there is a problem in that an installation space for installing the unit having the accumulator and the solenoid valve becomes large.

In view of the above, it is an object of the present invention to provide a large-capacity and small-sized accumulator device having an accumulator and a solenoid valve.

Means for solving the problems

A first aspect of the present invention provides an energy storage device, characterized in that, this energy storage device has: a body having an oil passage therein, the body being attached to an object to be attached; a plurality of accumulators connected to the oil passages; and a solenoid valve that controls a flow of oil in the oil passage, the solenoid valve including: a movable element that moves in a 1 st direction; and a valve unit disposed in the oil passage and configured to be opened and closed in accordance with movement of the movable element in the 1 st direction, the oil passage including: an input port into which the oil flows; an output port for discharging the oil; an input oil passage that connects the input port and the valve portion, and that connects the plurality of accumulators; and an output oil passage connecting the valve portion and the output port, wherein the plurality of accumulators extend in a 1 st direction and are arranged in parallel in a 2 nd direction perpendicular to the 1 st direction.

A second aspect of the present invention is the accumulator apparatus of the first aspect, wherein the solenoid valve is disposed at a position shifted in a 3 rd direction perpendicular to both the 1 st direction and the 2 nd direction with respect to the accumulator, and at a position overlapping in the 3 rd direction with a pair of the accumulators adjacent in the 2 nd direction, and a part of the solenoid valve is disposed at a position sandwiched between the pair of the accumulators in the 2 nd direction and overlapping with the pair of the accumulators in the 2 nd direction.

The utility model discloses an energy storage device of third mode's characterized in that in the energy storage device of second mode, a plurality of energy storages with the solenoid valve has respectively the edge cylindric outer barrel portion that the 1 st direction extends.

The utility model discloses an energy storage device of fourth mode's characterized in that, in the energy storage device of any one mode of first mode to third mode, the lower surface of fuselage with by the installation body contact and fixed, the 1 st direction with the 2 nd direction is along the direction of lower surface.

The utility model discloses an energy storage device of fifth mode's characterized in that, in the energy storage device of fourth mode, the solenoid valve dispose in the upside of energy storage ware.

The utility model discloses an energy storage device of sixth mode's characterized in that, in the energy storage device of fourth mode, the input oil circuit set up in the fuselage the tip of 1 st direction one side, the output oil circuit set up in than in the fuselage the tip of 1 st direction opposite side leans on the part of 1 st direction one side.

The utility model discloses an energy storage device of seventh mode's characterized in that, in the energy storage device of first mode, the lower surface of fuselage with by the installation body contact and fixed, the 1 st direction be with the crossing direction of lower surface.

An eighth aspect of the present invention is the accumulator device of the first aspect, further comprising a check valve disposed on the input oil passage, the check valve allowing the oil to flow from the input port to the valve portion or the accumulator and preventing the oil from flowing from the valve portion or the accumulator to the input port.

Effect of the utility model

According to the utility model discloses, provide and have energy storage ware and solenoid valve, large capacity and miniature energy storage ware device.

Drawings

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

Fig. 2 is a view showing the accumulator unit according to embodiment 1, and is a sectional view taken along line II-II in fig. 1.

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

Fig. 4 is a view showing the accumulator unit of embodiment 1, and is a sectional view IV-IV in fig. 2.

Fig. 5 is a view showing the accumulator unit according to embodiment 1, and is a V-V sectional view in fig. 1.

Fig. 6 is a sectional view showing a state where the accumulator of embodiment 1 has accumulated pressure.

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

Detailed Description

In an XYZ coordinate system shown in each figure 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, with respect to a certain object, a side closer to the center of the accumulator unit 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 unit 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 parts, and the actual positional relationship may be a positional relationship other than the positional relationship indicated by the names.

< embodiment 1 >

In the present embodiment, the front-rear direction X corresponds to 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 front side corresponds to the 1 st direction side.

The rear side corresponds to the other side of the 1 st direction.

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 unit 10 has a body 20, a check valve 50, a solenoid valve 40, and a plurality of accumulators 30. That is, the accumulator unit 10 is a unit including 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 they are arranged at different positions and 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 attached to a control valve CV as an attached body. As shown in fig. 2, the body 20 has a base 21 and a protrusion 22. As shown in fig. 3, the base 21 has a base main body 21a and four mounting portions 21 b. The shape of the base main body 21a is substantially rectangular 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 passes through a hole penetrating the mounting portion 21b in the up-down direction Z, into the control valve CV. Thereby, the accumulator unit 10 is fixed to the control valve CV.

The lower surface of the base main 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 unit 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 on 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 includes a part of the recess 23, an input port 26, an output port 27, an input oil passage 24, and an output oil passage 25. The input port 26 is a port through which the oil O flows from the 1 st port IP of the control valve CV. The output port 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 input port 26 and the output port 27 are open on the lower surface 20b of the body 20. As shown in fig. 3, the input port 26 is disposed at the front end of the center in the left-right direction Y on the lower surface 20b of the body 20. The output port 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 input port 26 as viewed from the lower side and the shape of the output port 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 section 24a extends upward from the input port 26 with a pair of accumulators 30A, 30B therebetween. That is, the input oil passage 24 passes between a pair of accumulators 30A, 30B adjacent to each other in the left-right direction Y. The inner peripheral surface of the 1 st segment 24a is cylindrical and extends in the vertical direction Z. As shown in fig. 2, the 1 st section 24a is provided at the front end portion in the body 20. That is, the input oil passage 24 is provided at the front end portion 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. The plug 60 is fixed in the 1 st part 24a by, for example, screwing a male screw provided on the outer peripheral surface of the plug 60 into a female screw provided on the inner peripheral surface of the upper end of the 1 st part 24 a.

The 1 st segment 24a has a connection portion 24e connected to the accumulator 30 at a position above the input port 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 connection 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 in which the inner diameter of the 1 st segment 24a is reduced toward the input port 26 side in the vertical direction Z, i.e., downward. 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 in the 1 st portion 24 a. The rear end of the 2 nd portion 24b opens at 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 input port 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 output port 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 output port 27. The inner peripheral 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 portion. Therefore, compared to the case where the output oil passage 25 is provided at the rear end portion of the body 20, the oil passage 20a can be made smaller in the front-rear direction X, and the entire accumulator unit 10 can be easily made smaller in the front-rear direction X. In the present embodiment, the output oil passage 25 is provided at the center in the front-rear direction X in the body 20. As shown in fig. 3, the output oil path 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 separate passages different 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 parallel in the left-right direction Y perpendicular to the front-rear direction X. As shown in fig. 4, in the present embodiment, a pair of accumulators 30A and 30B are disposed adjacent to both sides of the 1 st portion 24a in the left-right direction Y. A plurality of accumulators 30 are retained to 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 tube 31, a fixing portion 32, a pressure receiving portion 33, an O-ring 34, and compression coil springs 35a and 35 b.

The outer tube 31 has a bottomed cylindrical shape extending in the front-rear direction X. The outer tube 31 is open on the rear side. The outer cylinder 31 of the accumulator 30A is centered on the 2 nd central axis J2. The outer cylindrical portion 31 of the accumulator 30B is centered on the 3 rd central axis J3. The outer tube portion 31 is a part of the body 20, and is provided as a separate member from 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 end 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 and 30B in the lateral direction Y.

As shown in fig. 5, the fixing portion 32 has a bottomed cylindrical shape open on the front side. The fixing portion 32 is fitted to a rear end portion of the inside of the outer tube portion 31. The fixing portion 32 is supported from the rear side by, for example, a C-ring 37 fitted in a groove provided in the inner circumferential surface 31a of the outer cylindrical portion 31, and is held in the outer cylindrical 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 in the shape of a bottomed cylinder having a rear-side opening. The pressure receiving portion 33 is disposed in a portion of the inner portion of the outer tube portion 31 on the front side of the fixing portion 32 so as to be movable in the front-rear direction X. 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, that is, the input oil passage 24 in the present embodiment. The oil O flows into the storage space 36 through the connection portion 24 e.

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 31a of the outer tube 31. This can suppress the oil O flowing into the reservoir space 36 from leaking into the portion of the inside of the outer cylindrical portion 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 into 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 mover 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 on 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 movable element 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 has a cylindrical shape 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 the 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 inside 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 that penetrates 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 of the nozzle member 44 in the front-rear direction X. The valve chamber member 45 is cylindrical and opens on both sides in the front-rear direction X. The rear opening of the valve chamber member 45 opens into the through hole 44 c. An inlet port 45a, which is an opening on the front side of the valve chamber member 45, opens in 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 flow path 44 e. The valve body 46 is housed inside the valve chamber member 45. The spool 46 is a ball. The front end of the movable element 42 can contact the valve element 46.

The valve portion 43 opens and closes as the movable element 42 moves 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. Accordingly, the oil O flowing from the input port 26 into the input oil passage 24 flows into the output oil passage 25, and flows out from the output port 27.

On the other hand, when the solenoid portion 41 receives a propulsive force from the state in which the valve portion 43 is opened and the movable element 42 moves forward, the valve element 46 is pushed forward by the movable element 42, and the valve element 46 closes the inlet port 45 a. Thereby, the valve portion 43 is in a closed state. 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 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 movable element 42 of the solenoid valve 40 moves in the same direction as the accumulator 30 extends. 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 can be easily arranged in a state where the longitudinal directions of the accumulators and the solenoid valves 40 are aligned with each other. The plurality of accumulators 30 are arranged in parallel in a direction perpendicular to the direction in which they extend. Thus, for example, compared to a case where the longitudinal direction of the accumulator 30 and the longitudinal direction of the solenoid valve 40 are oriented in different directions, and a case where the plurality of accumulators 30 are arranged in parallel in the direction in which they extend, the plurality of accumulators 30 and the solenoid valves 40 can be arranged in a concentrated manner with high space efficiency.

Further, since the plurality of accumulators 30 are provided, when the total sum of the capacities of the entire accumulators 30 is the same, the capacity of each accumulator 30 can be reduced as compared with the case where only one accumulator 30 is provided, and the respective accumulators 30 can be downsized. By disposing the energy storage device 30 that is miniaturized as described above with space efficiency, it is easy to miniaturize the entire energy storage device 10 as compared with a case where one large energy storage device is disposed. Thus, according to the present embodiment, the accumulator device 10 having a large capacity and a small size can be obtained 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 aligned are the direction along the lower surface 20b of the body 20. Therefore, the accumulator device 10 can be downsized in the vertical direction Z, which is a direction perpendicular to the surface of the control valve CV on which the lower surface 20b is fixed. Thus, when the accumulator unit 10 is fixed to the control valve CV, the accumulator unit 10 can be prevented from protruding largely with respect to the control valve CV.

As shown in fig. 1 and 4, the solenoid valve 40 is disposed at a position offset in the vertical direction Z with respect to the accumulator 30, and at a position overlapping both of the pair of accumulators 30A and 30B adjacent in the left-right direction Y in the vertical direction Z. Therefore, the accumulator unit 10 can be downsized in the right-left direction Y compared to the case where the solenoid valve 40 and the pair of accumulators 30A, 30B are arranged in the right-left 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 into the inside of the V-shaped groove 38. Thus, a part of the solenoid valve 40 is disposed at a position sandwiched between the pair of accumulators 30A, 30B in the left-right direction Y and overlapping both of the pair of accumulators 30A, 30B in the left-right direction Y. Therefore, as described above, the solenoid valve 40 and the pair of accumulators 30A and 30B are arranged to overlap each other in the vertical direction Z, and the solenoid valve 40 can be arranged 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 unit 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 improved 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 electromagnetic valve 40 is disposed above the accumulator 30, the dimension of the accumulator unit 10 in the lateral direction Y is easily increased toward the side fixed to the control valve CV, that is, toward the lower side. This facilitates stable fixation of the accumulator unit 10 to the control valve CV.

In the present embodiment, since the plurality of accumulators 30 and the solenoid valve 40 have the cylindrical outer cylinder portions 31 and 41a extending in the front-rear direction X, respectively, the V-shaped groove 38 between the plurality of accumulators 30 in the left-right direction Y can be easily enlarged, and a part of the solenoid valve 40, that is, the lower end portion of the outer cylinder portion 41a can be easily inserted into the V-shaped groove 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 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 located between the connection portion 24e and the input port 26. The portion of the input oil passage 24 between the connection portion 24e and the input port 26 is, in the present embodiment, the portion of the 1 st portion 24a between the connection portion 24e and the input port 26 in the vertical direction Z. The check valve 50 allows the oil O to flow from the input port 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 input port 26. Therefore, the check valve 50 can prevent the oil O flowing into the input oil passage 24 from flowing backward to the input port 26. The check valve 50 also prevents the oil O flowing into the accumulator 30 through the connection portion 24e from flowing backward to the input port 26.

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

When the oil O flows in from the input port 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 input port 26, the valve body 51 is pressed against the seat portion 24d by the hydraulic pressure of the oil O, and the 1 st section 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 contacts 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 seat portion 24d, that is, downward in the present embodiment. This can maintain the valve body 51 at the input port 26 side of the connection portion 24e in the 1 st part 24 a. Therefore, the valve body 51 can be prevented from moving to the opening 24c side of the connection portion 24e in the 1 st portion 24a, and the oil O in the accumulator 30 can be prevented from flowing backward to the input port 26.

In the present embodiment, the 1 st part 24a has the opening portion 24c, and therefore the check valve 50 can be easily inserted into the 1 st part 24a from the opening portion 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 from 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 from the input port 26 into the 1 st 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 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 to the valve portion 43 through the storage space 36 or from the 2 nd portion 24b to the small-diameter concave portion 23 b.

Here, in the state where the valve portion 43 is closed, the oil O in the input oil passage 24 does not flow into 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 rearward by the hydraulic pressure of the oil O and moves. 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 via 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 output port 27 through the valve portion 43 and the output oil passage 25. At this time, when the accumulator 30 is in a state of accumulating pressure, the oil O pressed by the elastic force of the compression coil springs 35a, 35b flows from the reservoir space 36 to the input oil passage 24 via the connection portion 24e, and flows out from the output port 27 via the valve portion 43 and the output oil passage 25. As a result, the relatively high-pressure oil O pressurized by the pressure accumulated in the accumulator 30 can be discharged from the output port 27 until the state in which the coil springs 35a and 35b are compressed returns to the state shown in fig. 5.

When the accumulator and the solenoid valve are unitized as an accumulator device as in the present embodiment, the structure of the accumulator device is complicated, and the accumulator device is likely to be large 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 separate passages, the flow of the oil O as described above can be realized by merely disposing the check valve 50 in the input oil passage 24. This can simplify the structure of the oil passage 20a, and thus can simplify the structure of the accumulator device 10. Therefore, according to the present embodiment, the accumulator device 10 having a simple structure can be obtained while unitizing the accumulator 30 and the solenoid valve 40. 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 between the pair of accumulators 30A, 30B. In the present embodiment, both of the input oil passage 24 and the output oil passage 25 pass between the pair of accumulators 30A and 30B, and therefore the entire length of the oil passage 20A is more easily shortened.

Further, 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, so that 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 storage 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 storage space 36, the oil O flowing through the input oil passage 24 can be more easily made to flow to 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 flow into the three or more accumulators 30.

The present invention is not limited to the above embodiment, and other configurations may be adopted. The plurality of accumulators 30 may be arranged offset from each other in the front-rear direction X. The plurality of accumulators 30 may be arranged offset from each other in the vertical direction Z. In addition, three or more accumulators 30 may be provided. The volumes of the accumulators 30 may be the same as or different from each other. 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 parallel 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 at a lower side of the accumulator 30. 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 the input port 26 and the valve portion 43 are connected and the plurality of accumulators 30 are connected to the input oil passage 24. The output oil passage 25 is not particularly limited as long as the valve portion 43 is connected to the output port 27. The same oil passage may be used for the input oil passage 24 and the output oil passage 25. 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 the 1 st direction.

As shown in fig. 7, in the accumulator unit 110 of the present embodiment, the pair of accumulators 130A and 130B extend in the vertical direction Z. The outer cylinder 131 is open on the upper side. The mover of the solenoid valve 140 moves in the vertical 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 up-down direction Z.

In the present embodiment, the 1 st direction, i.e., the direction in which the accumulators 130A and 130B extend and the direction in which the mover of the solenoid valve 140 moves are directions intersecting the lower surface 120B of the body 120. In such a case, the area of the lower surface 120b of the body 120 is easily reduced 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 accumulator unit 110 of the present embodiment has a shape substantially similar to the shape of the accumulator unit 10 of embodiment 1 rotated by 90 ° in a posture in which the front surface of the accumulator unit 10 is the lower surface.

The application of the accumulator device according to each of the above embodiments is not particularly limited. In addition, the above-described 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 laid-open application No. 2017-058588, which is a japanese laid-open application filed 24/3/2017.

Description of the reference symbols

10. 110: an accumulator device; 20. 120: a body; 20 a: an oil path; 20b, 120 b: a lower surface; 24: an input oil path; 25: an output oil path; 26: an input port; 27: an output port; 30. 30A, 30B, 130A, 130B: an accumulator; 31. 41a, 131: an outer cylinder portion; 40. 140: an electromagnetic valve; 42: a movable element; 43: a valve section; 50: a check valve; CV: a control valve (mounted body); o: and (3) oil.

Claims (8)

1. An energy storage device, characterized in that,

the accumulator apparatus has:

a body having an oil passage therein, the body being attached to an object to be attached;

a plurality of accumulators connected to the oil passages; and

a solenoid valve that controls a flow of oil in the oil passage,

the electromagnetic valve has:

a movable element that moves in a 1 st direction; and

a valve unit disposed in the oil passage and opened and closed in accordance with movement of the movable element in the 1 st direction,

the oil passage has:

an input port into which the oil flows;

an output port for discharging the oil;

an input oil passage that connects the input port and the valve portion, and that connects the plurality of accumulators; and

an output oil passage connecting the valve portion with the output port,

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

2. Accumulator device according to claim 1,

the solenoid valve is disposed at a position shifted in a 3 rd direction perpendicular to both the 1 st direction and the 2 nd direction with respect to the accumulator, and at a position overlapping both of a pair of the accumulators adjacent in the 2 nd direction in the 3 rd direction,

a part of the solenoid valve is disposed at a position where the pair of accumulators are sandwiched between each other in the 2 nd direction and both of the pair of accumulators overlap in the 2 nd direction.

3. Accumulator device according to claim 2,

the plurality of accumulators and the solenoid valve each have a cylindrical outer cylinder portion extending in the 1 st direction.

4. Energy accumulator arrangement according to any one of claims 1 to 3,

the lower surface of the body is fixed in contact with the body to be mounted,

the 1 st direction and the 2 nd direction are directions along the lower surface.

5. Energy accumulator arrangement according to claim 4,

the electromagnetic valve is disposed on the upper side of the accumulator.

6. Energy accumulator arrangement according to claim 4,

the input oil passage is provided at an end portion of the body on the 1 st direction side,

the output oil passage is provided in a portion of the body on one side in the 1 st direction with respect to an end portion on the other side in the 1 st direction.

7. Accumulator device according to claim 1,

the lower surface of the body is fixed in contact with the body to be mounted,

the 1 st direction is a direction crossing the lower surface.

8. Accumulator device according to claim 1,

the accumulator unit further has a check valve disposed on the input oil passage,

the check valve allows the oil to flow from the input port to the valve portion or the accumulator and prevents the oil from flowing from the valve portion or the accumulator to the input port.

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