阅读说明：本技术 增压装置以及具备该增压装置的气缸装置 (Supercharging device and cylinder device provided with same ) 是由 朝原浩之 染谷和孝 于 2018-03-05 设计创作，主要内容包括：构成气缸装置(12)的增压装置(10)具备通过杆(96)连结的第一活塞(90)和第二活塞(94)。设置于第二活塞(94)上的连通用部件(160)被构成为：通过在第二活塞(94)朝向增压室(88a)缩小的方向位移时连通用部件(160)与缸主体(86)接触,从而能够从连通位置位移至切断位置,通过在第二活塞(94)朝向增压室(88a)扩大的方向位移时连通用部件(160)与缸主体(86)接触,从而能够从切断位置位移至连通位置。(a supercharging device (10) constituting a cylinder device (12) is provided with a first piston (90) and a second piston (94) which are connected by a rod (96). A communication member (160) provided to the second piston (94) is configured to: the communication member (160) is configured to contact the cylinder main body (86) when the second piston (94) is displaced in a direction in which the pressurizing chamber (88a) is reduced, thereby enabling displacement from the communication position to the blocking position, and the communication member (160) is configured to contact the cylinder main body (86) when the second piston (94) is displaced in a direction in which the pressurizing chamber (88a) is enlarged, thereby enabling displacement from the blocking position to the communication position.)

1. A supercharging device (10) is characterized by comprising:

A cylinder main body (86) provided with two cylinder chambers (82, 84) partitioned by a partition wall (80);

A first piston (90) which is slidably disposed in one of the cylinder chambers (82) and divides the interior of the one cylinder chamber (82) into a pressurizing chamber (88a) and a first chamber (88 b);

A second piston (94) which is slidably disposed in the other cylinder chamber (84) and which divides the other cylinder chamber (84) into a second chamber (92a) and a third chamber (92 b);

A rod (96) that is provided so as to penetrate the partition wall (80) and that connects the first piston (90) and the second piston (94) to each other; and

An urging member (98) that urges at least one of the first piston (90) and the second piston (94) in a direction in which the first piston (90) is urged toward the pressurizing chamber (88a),

The cylinder main body (86) is formed with:

A first inlet port (112) for introducing a fluid into the plenum (88 a);

A first atmosphere port (114) for opening the interior of the first chamber (88b) toward the atmosphere;

A second introduction port (126) for introducing a fluid into the second chamber (92 a);

A second atmosphere port (128) for opening the interior of the third chamber (92b) to atmosphere; and

A lead-out port (116) for leading out the fluid pressurized in the pressurizing chamber (88a),

A communication member (160) that has a communication hole (162) for communicating the second chamber (92a) and the third chamber (92b) with each other and is displaceable between a communication position at which the second chamber (92a) and the third chamber (92b) communicate with each other via the communication hole (162) and a blocking position at which the communication between the second chamber (92a) and the third chamber (92b) is blocked, is provided on the second piston (94),

the connection member (160) is configured to: the communication member (160) is configured to be capable of being displaced from the communication position to the cutoff position by being in contact with the cylinder main body (86) when the first piston (90) and the second piston (94) are displaced in a direction in which the pressurizing chamber (88a) is reduced, and configured to be capable of being displaced from the cutoff position to the communication position by being in contact with the cylinder main body (86) when the first piston (90) and the second piston (94) are displaced in a direction in which the pressurizing chamber (88a) is enlarged.

2. supercharging device (10) according to claim 1,

The second piston (94) is formed with a through hole (154) penetrating in the axial direction of the second piston (94),

The communication member (160) is displaced between the communication position and the blocking position by moving in the axial direction in the through hole (154).

3. Supercharging device (10) according to claim 2,

The connection member (106) has:

A main body portion (164) extending in an axial direction of the second piston (94); and

A sealing member (166) provided on the outer peripheral surface of one end portion of the main body portion (164),

The communication hole (162) includes:

a first hole (168) that opens onto an outer peripheral surface of an intermediate portion (164c) of the main body portion (164); and

A second hole (170) that opens at the other end of the main body (164),

The sealing member (166) is in airtight contact with the wall surface constituting the through hole (154) in a state where the connecting member (160) is located at the cutting position, and is separated from the wall surface constituting the through hole (154) in a state where the connecting member (160) is located at the connecting position.

4. Supercharging device (10) according to claim 3,

the main body (164) is configured to: one end surface of the body portion (164) is located on one side of the second piston (94) so as to be contactable with the cylinder body (86) in a state where the communication member (160) is located at the communication position, and the other end surface of the body portion (164) is located on the other side of the second piston (94) so as to be contactable with the cylinder body (86) in a state where the communication member (160) is located at the cutoff position.

5. Supercharging device (10) according to claim 4,

Wherein the other end surface of the main body portion (164) is located on the other side of the second piston (94) with respect to the other end surface of the main body portion (164) in a state where the linking member (160) is located at the communication position,

the second hole (170) is open on a side surface of the other end of the main body (164).

6. Supercharging device (10) according to claim 2,

the connection member (160) has a separation preventing portion (172) that prevents the connection member from separating from the through hole (154).

7. A cylinder device (12) is characterized by comprising:

The supercharging device (10) as claimed in any of claims 1 to 6;

A fluid pressure cylinder (14) having a piston (24) that divides the interior of a cylinder (18) into a first cylinder chamber (20) and a second cylinder chamber (22) and is capable of sliding back and forth within the cylinder (18);

a supply flow path (36) for supplying fluid into the first cylinder chamber (20);

A first introduction flow path (64) that guides the fluid discharged from the fluid pressure cylinder (14) to the first introduction port (112) of the supercharging device (10);

a second introduction flow path (66) that guides the fluid discharged from the fluid pressure cylinder (14) to the second introduction port (126) of the supercharging device (10); and

And a recovery flow path (68) that guides the pressurized fluid that is led out from the outlet port (116) of the supercharging device (10) to the supply flow path (36).

8. A cylinder device (12) according to claim 7,

A first check valve (74) that allows passage of fluid from the first introduction flow path (64) toward the first introduction port (112) and blocks passage of fluid from the first introduction port (112) toward the first introduction flow path (64) is provided in the first introduction flow path (64),

a second check valve (76) that allows passage of fluid from the second introduction flow path (66) toward the second introduction port (126) and blocks passage of fluid from the second introduction port (126) toward the second introduction flow path (66) is provided in the second introduction flow path (66),

a third check valve (78) is disposed in the recovery flow path (68), the third check valve allowing fluid to pass from the lead-out port (116) toward the recovery flow path (68) and preventing fluid from passing from the recovery flow path (68) toward the lead-out port (116).

Technical Field

The present invention relates to a supercharging device that supercharges and outputs fluid, and a cylinder device provided with the supercharging device.

Background

Conventionally, a turbocharger device shown in, for example, Japanese unexamined patent application publication No. Hei 3-42075 is known. The supercharging apparatus includes a cylinder main body having two cylinder chambers partitioned by a partition wall. The first piston disposed in one of the cylinder chambers and the second piston disposed in the other cylinder chamber are connected to each other by a rod penetrating the partition wall.

One of the cylinder chambers is provided with a first drive chamber located on the opposite side of the partition wall across the first piston and a first pressurizing chamber located between the first piston and the partition wall. The other cylinder chamber is provided with a second pressurizing chamber located between the second piston and the partition wall, and a second drive chamber located on the opposite side of the partition wall across the second piston.

The first drive chamber and the second drive chamber are selectively communicated with an introduction port, into which a fluid is introduced, and an atmosphere port, which is open to the atmosphere, via a switching valve. The first and second plenums communicate with the inlet port and with an outlet port for outlet of the pressurized fluid. The switching valve is provided on the partition wall and has push rods urged by a spring to protrude toward the first and second pressurizing chambers, respectively. The switching valve is configured to switch the flow path by pressing the push rod by the first piston or the second piston.

in the above-described turbocharger device, the flow path of the switching valve is switched by reciprocating the first piston and the second piston by the fluid introduced into the turbocharger device, and therefore, energy can be saved as compared with the case where the switching valve is configured as an electromagnetic switching valve.

However, in this supercharging apparatus, since a switching valve including a push rod biased by a spring is required, the structure of the supercharging apparatus becomes complicated.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object thereof is to provide a supercharging device capable of saving energy with a simple configuration, and a cylinder device provided with the supercharging device.

In order to achieve the above object, a supercharging device according to the present invention includes: a cylinder main body including two cylinder chambers partitioned by a partition wall; a first piston slidably disposed in one of the cylinder chambers and dividing the one of the cylinder chambers into a pressurizing chamber and a first chamber; a second piston slidably disposed in the other cylinder chamber and dividing the other cylinder chamber into a second chamber and a third chamber; a rod that is provided so as to penetrate the partition wall and that connects the first piston and the second piston to each other; and an urging member that urges at least one of the first piston and the second piston in a direction in which the first piston is urged toward the pressurizing chamber, wherein the cylinder main body is formed with: a first inlet port for introducing fluid into the plenum; a first atmosphere port for opening the first chamber to atmosphere; a second inlet port for introducing fluid into the second chamber; a second atmosphere port for opening the third chamber to atmosphere; and a delivery port for delivering the fluid pressurized in the pressurizing chamber, wherein the second piston is provided with a communication member that has a communication hole for communicating the second chamber with the third chamber and is displaceable between a communication position at which the second chamber and the third chamber communicate with each other via the communication hole and a blocking position at which the communication between the second chamber and the third chamber is blocked, and wherein the communication member is configured to: the connection member is configured to be capable of being displaced from the communication position to the shutoff position by being in contact with the cylinder main body when the first piston and the second piston are displaced in a direction in which the pressurizing chamber is reduced, and to be capable of being displaced from the shutoff position to the communication position by being in contact with the cylinder main body when the first piston and the second piston are displaced in a direction in which the pressurizing chamber is increased.

According to the above configuration, in a state where the communication member is located at the shutoff position, the fluid is supplied from the first introduction port to the pressurizing chamber, and the fluid is introduced from the second introduction port into the second chamber. Then, the first piston and the second piston are displaced toward the pressurizing chamber and the second chamber against the urging force of the urging member. When the communication member is displaced from the cutoff position to the communication position, the second chamber and the third chamber communicate with each other. Then, the first piston and the second piston are pushed back in the direction in which the pressurizing chamber and the second chamber contract by the urging force of the urging member, and therefore, the fluid in the pressurizing chamber is pressurized and led out from the lead-out port. In this way, the fluid itself supplied to the supercharging device can be used to supercharge the fluid, and therefore, energy saving of the supercharging device can be achieved. Further, since the communication member having the communication hole is displaced between the communication position and the cutoff position by being in contact with the cylinder main body, the configuration of the turbocharger device can be simplified.

In the above-described pressure boosting device, the second piston may be provided with a through hole penetrating in an axial direction of the second piston, and the connection-purpose member may be displaced between the communication position and the shutoff position by moving in the axial direction in the through hole.

According to the above configuration, the communication member can be displaced between the communication position and the blocking position with a simple configuration.

in the above-described pressure boosting device, the communication member may include: a body portion extending in an axial direction of the second piston; and a sealing member provided on an outer peripheral surface of one end portion of the body portion, the communication hole including: a first hole that opens on an outer peripheral surface of an intermediate portion of the main body; and a second hole that opens to the other end of the body, wherein the sealing member is in airtight contact with a wall surface constituting the through hole in a state where the linking member is located at the cutting position, and is separated from the wall surface constituting the through hole in a state where the linking member is located at the communicating position.

According to the above configuration, the communication between the second chamber and the third chamber can be blocked by the sealing member.

In the above-described pressure boosting device, the main body may be configured to: the one end surface of the body portion is located on one side of the second piston so as to be contactable with the cylinder body in a state where the connection-purpose member is located at the communication position, and the other end surface of the body portion is located on the other side of the second piston so as to be contactable with the cylinder body in a state where the connection-purpose member is located at the disconnection position.

According to the above configuration, the communication member can be displaced from the communication position to the blocking position by the contact of the one end surface of the body portion with the cylinder body, and the communication member can be displaced from the blocking position to the communication position by the contact of the other end surface of the body portion with the cylinder body.

In the above-described pressure boosting device, the other end surface of the main body may be located on the other side of the second piston in a state where the linking member is located at the communication position, and the second hole may be open in a side surface of the other end portion of the main body.

According to the above configuration, since the second hole is open on the side surface of the other end portion of the body portion, the communication hole can be prevented from being closed by the cylinder body in a state where the other end surface of the body portion is in contact with the cylinder body and the communication member is displaced from the cut-off position to the communication position.

In the above-described pressure boosting device, the communicating member may have a disengagement preventing portion for preventing the communicating member from disengaging from the through hole.

According to the above configuration, the continuous member can be prevented from coming off the through hole of the second piston.

The cylinder device according to the present invention is characterized by comprising: the above-described supercharging device; a fluid pressure cylinder having a piston which divides the interior of a cylinder portion into a first cylinder chamber and a second cylinder chamber and which is capable of reciprocating inside the cylinder portion; a supply flow path for supplying a fluid into the first cylinder chamber; a first introduction flow path that guides the fluid discharged from the fluid pressure cylinder to the first introduction port of the pressure boosting device; a second introduction flow path that guides the fluid discharged from the fluid pressure cylinder to the second introduction port of the pressure boosting device; and a recovery flow path that guides the pressurized fluid guided out from the outlet port of the supercharging device to the supply flow path.

According to the above configuration, the cylinder device can exhibit the same effect as the supercharging device. Further, since the fluid discharged from the fluid pressure cylinder can be pressurized by the pressurizing device and used again for driving the fluid pressure cylinder, energy saving of the cylinder device can be achieved.

In the cylinder device, the first introduction flow path may be provided with a first check valve that allows fluid to flow from the first introduction flow path to the first introduction port and blocks fluid from the first introduction port to the first introduction flow path, the second introduction flow path may be provided with a second check valve that allows fluid to flow from the second introduction flow path to the second introduction port and blocks fluid from the second introduction port to the second introduction flow path, and the recovery flow path may be provided with a third check valve that allows fluid to flow from the lead-out port to the recovery flow path and blocks fluid from the recovery flow path to the lead-out port.

According to the above configuration, the fluid in the pressurizing chamber can be efficiently pressurized with a simple configuration.

according to the present invention, since the fluid itself supplied to the supercharging device can be used to supercharge the fluid, energy saving of the supercharging device can be achieved. Further, since the communication member having the communication hole is displaced between the communication position and the cutoff position by being in contact with the cylinder main body, the configuration of the turbocharger device can be simplified.

The above objects, features and advantages will become more apparent from the accompanying drawings and the following description of preferred embodiments in conjunction therewith.

drawings

fig. 1 is a schematic view of a cylinder device according to an embodiment of the present invention.

fig. 2 is a perspective view of the supercharging device of fig. 1.

Fig. 3 is a longitudinal sectional view of the supercharging assembly of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is an exploded perspective view of the second piston and the communication member of fig. 3.

Fig. 6 is a longitudinal sectional view showing a state after the first piston and the second piston are displaced in the supercharging apparatus of fig. 3.

Fig. 7 is a schematic diagram showing a state after the switching valve of fig. 1 is switched.

Detailed Description

hereinafter, a description will be given of the supercharging device 10 according to the present invention by referring to the drawings while exemplifying preferred embodiments in terms of the relationship with the cylinder device 12.

As shown in fig. 1, a cylinder device 12 according to an embodiment of the present invention includes a fluid pressure cylinder 14 and a cylinder driving device 16 for driving the fluid pressure cylinder 14.

The fluid pressure cylinder 14 has a piston 24, and the piston 24 divides the interior of the cylinder portion 18 into a first cylinder chamber 20 and a second cylinder chamber 22, and is capable of reciprocating sliding within the interior of the cylinder portion 18 by the action of fluid pressure. The other end of the piston rod 26 having one end connected to the piston 24 extends from the cylinder 18 to the outside. The fluid pressure cylinder 14 performs an operation such as positioning of a workpiece (not shown) when the piston rod 26 is pushed out (extended), and does not perform the operation when the piston rod 26 is introduced. The first cylinder chamber 20 is a driving pressure chamber located on the opposite side of the piston rod 26, and the second cylinder chamber 22 is a return-side pressure chamber located on the piston rod 26 side.

The cylinder driving device 16 includes a driving circuit 28 and a pressure-increasing circuit 30. The drive circuit 28 supplies a drive fluid to the fluid pressure cylinder 14 and guides the fluid discharged from the fluid pressure cylinder 14. The drive circuit 28 includes a supply source 32, a switching valve 34, a supply channel 36, a first connection channel 38, a second connection channel 40, a third connection channel 42, and a discharge channel 44.

The supply source 32 supplies a high-pressure fluid, and is configured as a compressor, for example. The switching valve 34 is configured as an electromagnetic valve that has first to fifth ports 46a to 46e and is switchable between a first position and a second position. The first port 46a communicates with the supply source 32 via the supply passage 36. The second port 46b communicates with the first cylinder chamber 20 via the first connection flow path 38. The third port 46c communicates with the second cylinder chamber 22 via the second connection flow path 40. The fourth port 46d communicates with the third connection flow path 42. The fifth port 46e communicates with the discharge flow path 44.

when the switching valve 34 is located at the second position, the second port 46b and the fifth port 46e communicate with each other, and the third port 46c and the fourth port 46d communicate with each other, and the first port 46a is closed. When the switching valve 34 is in the first position, the first port 46a and the second port 46b communicate with each other, the third port 46c and the fifth port 46e communicate with each other, and the fourth port 46d is closed (see fig. 7). The switching valve 34 is held at the second position by the urging force of the spring 48 when not energized, and is switched from the second position to the first position when energized. The switching valve 34 is energized by outputting an energization command to the switching valve 34 from a not-shown higher-level device PLC (Programmable Logic Controller). The switching valve 34 is not energized by outputting a non-energization command from the PLC to the switching valve 34.

The supply passage 36 is used to introduce the fluid of the supply source 32 into the first cylinder chamber 20. The third connecting channel 42 connects the first connecting channel 38 and the second connecting channel 40 to each other. A check valve 50 is provided in the third connecting flow path 42. Check valve 50 allows fluid communication from first connection flow path 38 toward second connection flow path 40 and prevents fluid communication from second connection flow path 40 toward first connection flow path 38.

the discharge flow path 44 is provided with a first throttle valve 52, a second throttle valve 54, a muffler 56, and an exhaust port 58. The first throttle 52 is a variable throttle that can change the flow path cross-sectional area, and is provided to adjust the flow rate of the fluid from the first connection flow path 38 to the third connection flow path 42 when the switching valve 34 is at the second position.

The second throttle valve 54 is located further downstream (on the side opposite to the side where the switching valve 34 is located) in the discharge flow path 44 than the first throttle valve 52. The second throttle 54 is a variable throttle that can change the cross-sectional area of the flow path. The muffler 56 is located further downstream in the discharge flow path 44 than the second throttle 54. The muffler 56 reduces the exhaust sound of the fluid discharged from the exhaust port 58 into the atmosphere.

the pressure-increasing circuit 30 pressurizes the fluid discharged from the fluid cylinder 14 to the discharge passage 44 of the drive circuit 28, and returns the pressurized fluid to the supply passage 36 of the drive circuit 28. The booster circuit 30 includes a connection passage 60, a storage tank 62, a first introduction passage 64, a second introduction passage 66, a recovery passage 68, and the booster device 10.

The connecting flow path 60 connects between the first throttle valve 52 and the second throttle valve 54 in the discharge flow path 44 and the storage tank 62 to each other. The connection flow path 60 is provided with a check valve 72. Check valve 72 allows fluid communication from drain flow path 44 toward reservoir tank 62 and prevents fluid communication from reservoir tank 62 toward drain flow path 44. The reservoir tank 62 is used to store the fluid guided from the discharge flow path 44 to the supercharging device 10, and is configured as an air reservoir, for example.

The first introduction flow path 64 introduces the fluid discharged from the fluid pressure cylinder 14 into the first introduction port 112 of the booster device 10. The first introduction flow path 64 connects the reservoir tank 62 and the first introduction port 112 of the booster device 10 to each other. The first introduction flow path 64 is provided with a first check valve 74. The first check valve 74 allows fluid communication from the first introduction flow path 64 (the reserve tank 62) toward the first introduction port 112, and blocks fluid communication from the first introduction port 112 toward the first introduction flow path 64 (the reserve tank 62).

The second introduction flow path 66 introduces the fluid discharged from the fluid pressure cylinder 14 into the second introduction port 126 of the booster device 10. The second introduction flow path 66 connects a portion of the first introduction flow path 64 on the upstream side (the reservoir tank 62 side) of the first check valve 74 and the second introduction port 126 of the booster device 10 to each other. The second introduction flow path 66 is provided with a second check valve 76. The second check valve 76 allows the fluid to circulate from the second introduction flow path 66 (the reserve tank 62) toward the second introduction port 126, and blocks the fluid from circulating from the second introduction port 126 toward the second introduction flow path 66 (the reserve tank 62).

The recovery flow path 68 leads out the pressurized fluid led out from the lead-out port 116 of the turbocharger device 10 to the supply flow path 36. The recovery flow path 68 connects the lead-out port 116 of the turbocharger device 10 and the supply flow path 36 to each other. The recovery flow path 68 is provided with a third check valve 78. The third check valve 78 allows fluid to pass from the lead-out port 116 toward the recovery flow path 68 (supply flow path 36), and blocks fluid from passing from the recovery flow path 68 (supply flow path 36) toward the lead-out port 116.

As shown in fig. 3, the supercharging apparatus 10 includes: a cylinder main body 86 (see fig. 2) having two cylinder chambers 82, 84 partitioned by a partition wall 80; a first piston 90 slidably disposed in one of the cylinder chambers 82 and dividing the interior of the one cylinder chamber 82 into a pressurizing chamber 88a and a first chamber 88 b; a second piston 94 disposed slidably in the other cylinder chamber 84 and dividing the other cylinder chamber 84 into a second chamber 92a and a third chamber 92 b; a rod 96 that is provided so as to penetrate the partition wall 80 and that connects the first piston 90 and the second piston 94 to each other; and an urging member 98 that urges the second piston 94 in a direction to urge the first piston 90 toward the pressurizing chamber 88 a.

The cylinder body 86 has a first cylinder tube 100, a first end cap 102, a partition wall 80, a second cylinder tube 104, and a second end cap 106. The first cylinder tube 100 has a cylinder chamber 82 formed over the entire length. A first end cap 102 is fitted into an opening on one end side of the cylinder chamber 82, and a partition wall 80 is fitted into an opening on the other end side of the cylinder chamber 82. The first end cover 102, the first cylinder tube 100, and the partition wall 80 are coupled to each other by fastening members 108 such as bolts. An annular seal member 110 is attached to the first end cap 102, and the seal member 110 is in airtight contact with a wall surface constituting an opening portion on one end side of the first cylinder tube 100.

A plenum 88a is formed between the first end cap 102 and the first piston 90. A first chamber 88b is formed between the first piston 90 and the partition wall 80. A first introduction port 112 for introducing fluid into the pressurizing chamber 88a is formed at one end portion of the first cylinder 100. The first introduction port 112 communicates with the first introduction flow path 64. The other end of the first cylinder 100 is formed with a first atmosphere port 114 for opening the inside of the first chamber 88b to the atmosphere.

a discharge port 116 for discharging the fluid pressurized in the pressurizing chamber 88a is formed at substantially the center of the first end cover 102. The lead-out port 116 communicates with the recovery flow path 68. The lead-out port 116 is formed so as to penetrate the first end cap 102 in the thickness direction. An annular seal member 118 is attached to the partition wall 80, and the seal member 118 is in airtight contact with a wall surface constituting an opening portion on the other end side of the first cylinder tube 100. A rod insertion hole 120 through which the rod 96 is inserted is formed in the partition wall 80. A rod packing 122 is mounted on a wall surface constituting the rod insertion hole 120 so as to be in airtight contact with the rod 96.

The second cylinder tube 104 has a cylinder chamber 84 formed therein extending over the entire length thereof. The partition wall 80 is fitted into an opening on one end side of the cylinder chamber 84, and the second end cover 106 is fitted into an opening on the other end side of the cylinder chamber 84. The second cylinder 104 and the partition wall 80 are coupled to each other by a fastening member, not shown, such as a bolt. An annular seal member 124 is attached to the partition wall 80, and the seal member 124 is in airtight contact with a wall surface constituting an opening portion on one end side of the second cylinder 104.

The second chamber 92a is formed between the partition wall 80 and the second piston 94. The third chamber 92b is formed between the second piston 94 and the second end cap 106. The partition wall 80 is formed with a second introduction port 126 for introducing a fluid into the second chamber 92 a. The second introduction port 126 communicates with the second introduction flow path 66. The second introduction port 126 opens on the wall surface in the partition wall 80 that constitutes the outer surface of the cylinder main body 86 and the wall surface in the partition wall 80 that constitutes the second chamber 92 a. The second cylinder 104 is formed with a second atmosphere port 128 that communicates with the third chamber 92 b. The second atmosphere port 128 is provided with an exhaust port 132 (see fig. 1) via a muffler 130. An annular seal member 134 is attached to the second end cap 106, and the seal member 134 is in airtight contact with a wall surface constituting an opening portion on the other end side of the second cylinder 104.

An installation groove 138 is formed in the outer peripheral surface of the first piston 90, and an annular piston packing 136 that is in airtight contact with the inner peripheral surface of the first cylinder tube 100 is installed in the installation groove 138. The first piston 90 has a mounting hole 140 formed in a central portion thereof to which one end of the rod 96 is mounted.

An installation groove 144 is formed on the outer peripheral surface of the second piston 94, and an annular piston seal ring 142 that is in airtight contact with the inner peripheral surface of the second cylinder 104 is installed in the installation groove 144. A bolt mounting hole 148 is formed in a central portion of the second piston 94, and a bolt 146 for connecting the second piston 94 and the other end portion of the rod 96 is disposed in the bolt mounting hole 148.

the biasing member 98 is a compression spring that biases the second piston 94 toward the partition wall 80. The biasing member 98 is disposed in the third chamber 92 b. The biasing member 98 is interposed between a guide portion 150 protruding from the second end cap 106 toward the second piston 94 and the second piston 94. A part of the guide portion 150 is inserted into the inner hole of the urging member 98. The second end cap 106 is located entirely within the second cylinder 104. A stopper ring 152 that prevents the other end of the second head 106 from moving is provided on a wall surface that forms an opening on the other end of the second cylinder 104.

As shown in fig. 3 to 5, the second piston 94 is formed with two through holes 154 penetrating in the axial direction of the second piston 94. These through holes 154 are provided point-symmetrically about the axis of the second piston 94. Each through hole 154 includes a large diameter hole 156a and a small diameter hole 156b, wherein the large diameter hole 156a opens to one surface in the axial direction of the second piston 94, and the small diameter hole 156b communicates with the large diameter hole 156a and opens to the other surface in the axial direction of the second piston 94. That is, a stepped surface 158 directed to the partition wall 80 is provided at the boundary between the large-diameter hole 156a and the small-diameter hole 156 b.

Each through hole 154 is provided with a communicating member 160 that is movable in the axial direction of the second piston 94. The connecting member 160 includes a body portion 164 and a sealing member 166, the body portion 164 includes a communication hole 162 for communicating the second chamber 92a and the third chamber 92b with each other, and the sealing member 166 is provided on the body portion 164. The main body 164 includes: a first large diameter portion 164a as one end portion of the body portion 164, a second large diameter portion 164b as the other end portion of the body portion 164, and a small-diameter intermediate portion 164c connecting the first large diameter portion 164a and the second large diameter portion 164b to each other.

The first large-diameter portion 164a is configured to be insertable into the large-diameter hole 156 a. The intermediate portion 164c is inserted into the small-diameter hole 156 b. The second large diameter portion 164b is located within the third chamber 92 b.

the sealing member 166 is attached to the outer peripheral surface of the first large diameter portion 164 a. The communication hole 162 includes a first hole 168 and a second hole 170, wherein the first hole 168 is opened on the outer peripheral surface of the middle portion 164c of the body portion 164, and the second hole 170 is opened on the outer surface of the second large diameter portion 164b of the body portion 164. The first hole 168 penetrates the intermediate portion 164c in a direction orthogonal to the axial direction of the second piston 94. The second hole 170 includes: a long hole 170a extending from the first hole 168 to the other end surface of the intermediate portion 164c, a recess portion 170b formed on the end surface of the second large diameter portion 164b, and an intermediate hole 170c communicating with the long hole 170a and opening on the bottom surface of the recess portion 170 b. The recess 170b extends over the entire radial range of the second large-diameter portion 164 b. That is, the recess 170b is open on the outer peripheral surface of the second large diameter portion 164 b.

The communication member 160 is configured to: and is displaceable between a communication position (position shown in fig. 6) at which the second chamber 92a and the third chamber 92b communicate with each other via the communication hole 162, and a blocking position (position shown in fig. 3) at which the communication between the second chamber 92a and the third chamber 92b is blocked. That is, as shown in fig. 6, when the communication member 160 is located at the communication position, the first large-diameter portion 164a is disengaged from the large-diameter hole 156a toward the inside of the second chamber 92a, and the second chamber 92a and the third chamber 92b are communicated with each other via the communication hole 162 and the large-diameter hole 156 a. At this time, the sealing member 166 is separated from the wall surface constituting the large diameter hole 156 a. As shown in fig. 3, when the communication member 160 is located at the blocking position, the sealing member 166 is in airtight contact with the wall surface constituting the large-diameter hole 156a, and the communication between the second chamber 92a and the third chamber 92b is blocked.

The connection member 160 is displaced from the communication position to the cutoff position by the first large-diameter portion 164a (the communication member 160) contacting the partition wall 80 (the cylinder main body 86) when the first piston 90 and the second piston 94 are displaced in the direction in which the pressurizing chamber 88a is contracted (the left side in fig. 3). In other words, the communication member 160 is switched from the communication position to the blocking position when the second piston 94 is positioned at one stroke end. At this time, the first large diameter portion 164a contacts the stepped surface 158, and restricts the movement of the linking member 160 toward the other end side (the guide portion 150 side). Further, the first large diameter portion 164a protrudes into the second chamber 92a while being in contact with the step surface 158.

further, the main body 164 is configured to: in a state where the communication member 160 is located at the blocking position, the other end surface of the body portion 164 is located on the other side of the second piston 94 so as to be able to contact the cylinder body 86.

as shown in fig. 6, when the first piston 90 and the second piston 94 are displaced in the direction in which the pressurizing chamber 88a expands (rightward in fig. 6), the second large-diameter portion 164b (the communicating member 160) comes into contact with the guide portion 150 (the cylinder main body 86), thereby displacing from the cut-off position to the communicating position. In other words, the communication member 160 is switched from the communication position to the blocking position when the second piston 94 is positioned at the other stroke end. At this time, the second large-diameter portion 164b contacts the second piston 94, and restricts the movement of the linking member 160 toward the one end side (the partition wall 80 side). Further, the second large-diameter portion 164b protrudes toward the inside of the third chamber 92b in a state of being in contact with the second piston 94.

Further, the main body 164 is configured to: in a state where the communication member 160 is located at the communication position, one end surface of the body portion 164 is located on the side of the second piston 94 so as to be able to contact the cylinder body 86. At this time, the other end surface of the body portion 164 is positioned further to the other side than the second piston 94.

That is, the communicating member 160 is displaced between the communicating position and the blocking position by moving in the axial direction in the through hole 154. In fig. 4, the communicating member 160 has a disengagement preventing portion 172 that prevents the communicating member 160 from disengaging from the through hole 154.

The separation preventing portion 172 includes a first large diameter portion 164a and a stepped surface 158, and the first large diameter portion 164a contacts the stepped surface 158 to prevent the communication member 160 from being separated from the through hole 154 into the third chamber 92 b. The disengagement preventing portion 172 includes a second large diameter portion 164b, and prevents the communicating member 160 from disengaging from the through hole 154 into the second chamber 92a by the second large diameter portion 164b coming into contact with the other surface of the second piston 94.

The configuration of the supercharging apparatus 10 and the cylinder apparatus 12 according to the present embodiment is basically as described above, and the operation (use method) thereof will be described below. In the initial state, as shown in fig. 1, the piston 24 of the fluid pressure cylinder 14 is positioned at the stroke end on the opposite side of the piston rod 26, and the switching valve 34 is positioned at the second position. Further, the communication member 160 of the turbocharger device 10 is located at the shutoff position (see fig. 3).

In the cylinder device 12, when the drive step of extending the piston rod 26 is performed, the switching valve 34 is switched from the second position to the first position as shown in fig. 7. Then, a high-pressure fluid (compressed air) flows from the supply source 32 into the first cylinder chamber 20 via the supply passage 36, the first port 46a, the second port 46b, and the first connection passage 38. Thereby, the piston 24 is displaced toward the piston rod 26 side to extend the piston rod 26, and the fluid in the second cylinder chamber 22 is discharged to the discharge flow path 44 via the second connection flow path 40, the third port 46c, and the fifth port 46 e. At this time, since the fourth port 46d communicating with the third connecting passage 42 is closed, the fluid of the supply source 32 is efficiently supplied into the first cylinder chamber 20. The fluid discharged from the second cylinder chamber 22 to the discharge flow path 44 is discharged to the atmosphere via the muffler 56 and the exhaust port 58. However, the fluid in the discharge flow path 44 may be stored in the storage tank 62 by adjusting the flow path cross-sectional area of the second throttle 54.

next, when the return process of retracting the piston rod 26 is performed, the switching valve 34 is switched from the first position to the second position as shown in fig. 1. Then, since the first port 46a communicating with the supply passage 36 is closed, the supply of the fluid from the supply source 32 into the first cylinder chamber 20 is stopped. The fluid in the first cylinder chamber 20 is introduced into the second cylinder chamber 22 through the first connection passage 38, the third connection passage 42, the fourth port 46d, the third port 46c, and the second connection passage 40. Thereby, the piston 24 is displaced toward the opposite side of the piston rod 26, the piston rod 26 is drawn in, and the fluid in the first cylinder chamber 20 is discharged to the first connection flow path 38.

In the resetting process, the piston 24 is displaced by the fluid discharged from the first cylinder chamber 20. Therefore, it is not necessary to supply fluid from the supply source 32 into the second cylinder chamber 22, and the power consumption and the air consumption of the supply source 32 can be suppressed, so that energy saving of the cylinder device 12 can be achieved.

The fluid discharged from the first cylinder chamber 20 to the first connection flow path 38 is guided to the third connection flow path 42, and is guided to the discharge flow path 44 via the second port 46b and the fifth port 46 e. At this time, the ratio of the flow rate of the fluid guided to the third connecting passage 42 to the flow rate of the fluid guided to the discharge passage 44 is adjusted by changing the passage cross-sectional area of the first throttle valve 52.

The fluid guided to the discharge flow path 44 is stored in the storage tank 62 via the connection flow path 60 by adjusting the flow path sectional area of the second throttle 54. This enables the pressure of the fluid in the storage tank 62 to be quickly increased to a pressure that is about half the pressure of the fluid discharged from the supply source 32.

The fluid in the reservoir tank 62 is introduced into the pressurizing chamber 88a via the first introduction flow path 64 and the first introduction port 112, and is introduced into the second chamber 92a via the second introduction flow path 66 and the second introduction port 126. At this time, as shown in fig. 3, since the connection member 160 is located at the cutting position, the communication between the second chamber 92a and the third chamber 92b is cut off. Further, since the first port 46a communicating with the supply flow path 36 is closed, the pressure of the fluid on the supply flow path 36 side of the recovery flow path 68 with respect to the third check valve 78 is higher than the pressure of the fluid in the storage tank 62. Therefore, the fluid introduced into the pressurizing chamber 88a from the first introduction port 112 does not flow to the recovery flow path 68.

The fluid introduced into the pressurizing chamber 88a urges the first piston 90 toward the other end side of the cylinder main body 86 with a force F1. The fluid introduced into the second chamber 92a presses the second piston 94 toward the other end side of the cylinder main body 86 with a force F2. Thereby, the first piston 90 and the second piston 94 are pushed toward the other end side of the cylinder main body 86 by the resultant force of the force F1 and the force F2.

Then, the first piston 90 and the second piston 94 are displaced toward the other end side of the cylinder main body 86 against the urging force of the urging member 98 (while compressing the urging member 98). At this time, the fluid in the first chamber 88b is discharged to the atmosphere via the first atmosphere port 114, and the fluid in the third chamber 92b is discharged to the atmosphere via the second atmosphere port 128. In fig. 6, when the other end surface of the communication member 160 comes into contact with the projecting end surface of the projecting portion of the guide portion 150, the communication member 160 moves toward the partition wall 80 side in the through hole 154, and is displaced from the cut position to the communication position. Thereby, the second chamber 92a and the third chamber 92b communicate with each other via the communication hole 162.

When the second chamber 92a and the third chamber 92b are in communication with each other, the same pressure is present in the second chamber 92a and in the third chamber 92b, and thus the force F2 no longer acts on the second piston 94. Therefore, the first piston 90 and the second piston 94 are displaced toward the one end side of the cylinder main body 86 by the urging force of the urging member 98. At this time, the fluid in pressurizing chamber 88a is prevented from flowing backward to storage tank 62 by first check valve 74, and the fluid in second chamber 92a is prevented from flowing backward to storage tank 62 by second check valve 76. The first chamber 88b is filled with the fluid flowing through the first atmosphere port 114, and the third chamber 92b is filled with the fluid flowing through the second chamber 92 a. Thereby, the fluid within plenum 88a is pressurized.

when the pressure of the fluid in the pressurizing chamber 88a becomes equal to or higher than the pressure of the fluid led out from the supply source 32 (the pressure of the fluid existing in the recovery flow path 68 and the supply flow path 36), the fluid in the pressurizing chamber 88a flows toward the side of the recovery flow path 68 closer to the supply flow path 36 than the third check valve 78, and is recovered to the supply flow path 36.

When the first piston 90 and the second piston 94 return to their original positions, the fluid in the reservoir 62 is introduced into the pressurizing chamber 88a and the second chamber 92a, and the above-described pressurizing operation is performed again. That is, in the present embodiment, in the returning step of the fluid pressure cylinder 14, the above-described supercharging operation of the multi-time supercharging device 10 is performed.

Then, in the driving step of the fluid cylinder 14, the piston 24 of the fluid cylinder 14 is driven using the fluid recovered from the booster 10, so that the load on the supply source 32 can be reduced. That is, in the driving step of the fluid pressure cylinder 14, the power consumption and the air consumption of the supply source 32 can be suppressed, and therefore, the energy saving of the cylinder device 12 can be achieved.

Next, the operation and effect of the present embodiment will be described.

The supercharging device 10 includes: a cylinder main body 86 having two cylinder chambers 82, 84 partitioned by a partition wall 80; a first piston 90 slidably disposed in one of the cylinder chambers 82 and dividing the interior of the one cylinder chamber 82 into a pressurizing chamber 88a and a first chamber 88 b; a second piston 94 disposed slidably in the other cylinder chamber 84 and dividing the other cylinder chamber 84 into a second chamber 92a and a third chamber 92 b; a rod 96 that is provided so as to penetrate the partition wall 80 and that connects the first piston 90 and the second piston 94 to each other; and an urging member 98 that urges at least one of the first piston 90 and the second piston 94 in a direction in which the first piston 90 is urged toward the pressurizing chamber 88 a.

The cylinder main body 86 is formed with a first introduction port 112 for introducing a fluid into the pressurizing chamber 88a, a first atmosphere port 114 for opening the inside of the first chamber 88b to the atmosphere, a second introduction port 126 for introducing a fluid into the second chamber 92a, a second atmosphere port 128 for opening the inside of the third chamber 92b to the atmosphere, and an outlet port 116 for discharging a fluid pressurized in the pressurizing chamber 88 a.

The second piston 94 is provided with a communication member 160, and the communication member 160 has a communication hole 162 for communicating the second chamber 92a and the third chamber 92b with each other, and is displaceable between a communication position at which the second chamber 92a and the third chamber 92b communicate with each other via the communication hole 162, and a blocking position at which the communication between the second chamber 92a and the third chamber 92b is blocked.

The communication member 160 is configured to: the communication member 160 is capable of moving from the communication position to the blocking position by contacting the cylinder main body 86 when the first piston 90 and the second piston 94 are displaced in a direction in which the pressurizing chamber 88a is reduced, and capable of moving from the blocking position to the communication position by contacting the cylinder main body 86 when the first piston 90 and the second piston 94 are displaced in a direction in which the pressurizing chamber 88a is enlarged.

Thus, in a state where the communication member 160 is located at the shutoff position, the fluid is supplied from the first introduction port 112 to the pressurizing chamber 88a, and the fluid is supplied from the second introduction port 126 into the second chamber 92 a. Then, the first piston 90 and the second piston 94 are displaced toward the pressurizing chamber 88a and the second chamber 92a expanding against the urging force of the urging member 98. When the communication member 160 is displaced from the cutoff position to the communication position, the second chamber 92a and the third chamber 92b communicate with each other.

Then, the first piston 90 and the second piston 94 are pushed back in a direction in which the pressurizing chamber 88a and the second chamber 92a are contracted by the urging force of the urging member 98, and therefore, the fluid in the pressurizing chamber 88a is pressurized and led out from the lead-out port 116. In this way, the fluid itself supplied to the booster device 10 can be utilized to boost the fluid, and therefore, energy saving of the booster device 10 can be achieved. Further, the communication member 160 having the communication hole 162 is displaced between the communication position and the cutoff position by being in contact with the cylinder main body 86, so that the configuration of the turbocharger 10 can be simplified.

the second piston 94 is formed with a through hole 154 penetrating in the axial direction of the second piston 94. The linking member 160 is displaced between the linking position and the blocking position by moving in the axial direction in the through hole 154. Thus, the communication member 160 can be displaced between the communication position and the blocking position with a simple configuration.

the communication member 160 includes a body portion 164 extending in the axial direction of the second piston 94, and a seal member 166 provided on the outer peripheral surface of one end portion of the body portion 164. The communication hole 162 includes a first hole 168 that opens on the outer peripheral surface of the intermediate portion 164c of the main body portion 164, and a second hole 170 that opens at the other end portion of the main body portion 164. The sealing member 166 is in airtight contact with the wall surface constituting the through hole 154 in a state where the communicating member 160 is located at the cutting position, and is separated from the wall surface constituting the through hole 154 in a state where the communicating member 160 is located at the communicating position. Thus, the communication between the second chamber 92a and the third chamber 92b can be blocked by the sealing member 166.

The main body 164 is configured to: when the communication member 160 is located at the communication position, one end surface of the body portion 164 is located on one side of the second piston 94 so as to be able to contact the cylinder body 86, and when the communication member 160 is located at the blocking position, the other end surface of the body portion 164 is located on the other side of the second piston 94 so as to be able to contact the cylinder body 86. Thus, the communication member 160 can be displaced from the communication position to the blocking position by the contact of the one end surface of the body portion 164 with the cylinder body 86, and the communication member 160 can be displaced from the blocking position to the communication position by the contact of the other end surface of the body portion 164 with the cylinder body 86.

When the communication member 160 is located at the communication position, the other end surface of the body 164 is located on the other side of the second piston 94. The second hole 170 is open on the side surface of the other end portion of the main body portion 164. Accordingly, since the second hole 170 is open on the side surface of the other end portion of the body portion 164, the communication hole 162 can be prevented from being closed by the cylinder main body 86 in a state where the other end surface of the body portion 164 is in contact with the cylinder main body 86 and the communication member 160 is displaced from the cut-off position to the communication position.

The communicating member 160 has a disengagement preventing portion 172 that prevents the communicating member 160 from disengaging from the through hole 154. This can prevent the communicating member 160 from coming off the through hole 154 of the second piston 94.

The cylinder device 12 includes: a pressure boosting device 10; a fluid pressure cylinder 14 having a piston 24 which divides the interior of the cylinder portion 18 into a first cylinder chamber 20 and a second cylinder chamber 22 and is capable of reciprocating inside the cylinder portion 18; a supply flow path 36 for supplying fluid into the first cylinder chamber 20; a first introduction flow path 64 that guides the fluid discharged from the fluid pressure cylinder 14 to a first introduction port 112 of the booster device 10; a second introduction flow path 66 that guides the fluid discharged from the fluid cylinder 14 to a second introduction port 126 of the booster device 10; and a recovery flow path 68 that guides the pressurized fluid led out from the lead-out port 116 of the turbocharger device 10 to the supply flow path 36.

the first introduction flow path 64 is provided therein with a first check valve 74, and the first check valve 74 allows the fluid to pass from the first introduction flow path 64 toward the first introduction port 112 and prevents the fluid from passing from the first introduction port 112 toward the first introduction flow path 64. A second check valve 76 is provided in the second introduction flow path 66, and this second check valve 76 allows the fluid to pass from the second introduction flow path 66 toward the second introduction port 126, and prevents the fluid from passing from the second introduction port 126 toward the second introduction flow path 66. The recovery flow path 68 is provided with a third check valve 78, and the third check valve 78 allows the fluid to flow from the lead-out port 116 toward the recovery flow path 68 and prevents the fluid from flowing from the recovery flow path 68 toward the lead-out port 116. This allows the fluid in the pressurizing chamber 88a to be efficiently pressurized with a simple configuration.

the present invention is not limited to the above configuration. For example, in the turbocharger device 10, the biasing member 98 may be disposed in the first chamber 88b, and the first piston 90 may be biased toward the opposite side of the rod 96 by the biasing member 98.

in the booster device 10, the pressurizing chamber 88a may also be disposed between the first piston 90 and the partition wall 80, the first chamber 88b may be disposed between the first end cap 102 and the first piston 90, the second chamber 92a may be disposed between the second piston 94 and the second end cap 106, and the third chamber 92b may be disposed between the second piston 94 and the partition wall 80. In this case, the cylinder main body 86 is formed with a first introduction port 112 communicating with the pressurizing chamber 88a, a first atmosphere port 114 communicating with the first chamber 88b, a second introduction port 126 communicating with the second chamber 92a, a second atmosphere port 128 communicating with the third chamber 92b, and an exhaust port 116 communicating with the pressurizing chamber 88 a. The biasing member 98 is provided to bias at least one of the first piston 90 and the second piston 94 in a direction in which the pressurizing chamber 88a is narrowed. Even with such a configuration, the same effects as those of the above configuration are exhibited.

Needless to say, the supercharging device and the cylinder device according to the present invention are not limited to the above embodiments, and various configurations may be adopted without departing from the spirit of the present invention.