Fluid pressure cylinder

Abstract

A fluid pressure cylinder (10) is provided with a cylinder section (12) and an adapter unit section (14). The adapter unit portion is detachably attached to a cylinder tube (16) of the cylinder portion. A first input / output port (84a) and a second input / output port (84b) communicating with the piston chamber (22) are formed in the cylinder tube. A first mounting hole (116a) and a second mounting hole (116b) are formed in the adapter unit part. A first supply and discharge pipe (140a) and a connected second supply and discharge pipe (140b) are respectively mounted in the first mounting hole and the second mounting hole.

Description

Technical Field

[0001] The present invention relates to a fluid pressure cylinder that operates based on the supply and discharge of pressure fluid. Background Art

[0002] As described in Japanese Patent Publication No. 2019-113101, the cylinder includes a cylinder barrel having a piston chamber and a piston accommodated in the piston chamber. In addition, a supply and discharge pipe for supplying and discharging compressed air to the piston chamber is connected to the cylinder. Depending on the circumstances, a position sensor for detecting the position of the piston is sometimes also provided in the cylinder barrel. In addition, a sealing component (gasket) is installed on the side circumferential wall (peripheral portion) of the piston. The sealing component seals between the side circumferential wall of the piston and the inner circumferential wall of the piston chamber.

[0003] The piston moves in the piston chamber based on the supply and discharge of compressed air relative to the piston chamber. As a result, the sealing component slides in contact with the side wall of the piston. Therefore, when the cylinder is repeatedly moved, the sealing component wears out. In other words, the sealing component is a consumable part. In addition to the sealing component, the cylinder also includes various consumable parts. Therefore, regular maintenance is required in the cylinder.

[0004] The cylinder is installed in, for example, a predetermined device or equipment. Therefore, when performing maintenance on the cylinder, it is necessary to remove the cylinder from the predetermined device or equipment. Next, remove the supply and exhaust pipes from the cylinder. If a position sensor is installed in the cylinder, then remove the position sensor from the cylinder. Next, disassemble the cylinder to replace consumable parts.

[0005] Then, assemble the cylinder, and then install the position sensor on the cylinder. Then, install the supply and discharge pipes on the cylinder. Then, install the cylinder on a specified device or equipment, and further adjust the installation position of the position sensor. That is, for example, move the piston to a specified position, and configure the position sensor at the position of the piston that can detect this state. After the above process, the maintenance is completed.

[0006] As can be understood from the above, the maintenance of the cylinder includes many operation steps. Therefore, it is not easy to perform maintenance on the cylinder. In addition, during the period of performing maintenance on the cylinder, the device or equipment etc. on which the cylinder is installed must be stopped. Therefore, the operating efficiency of the device or equipment etc. is reduced.

[0007] In addition, after the cylinder is assembled, the piston is housed inside the cylinder tube, so the operator cannot visually check the piston. Under such circumstances, it is not easy to align the piston with the position sensor. Summary of the invention

[0008] An object of the present invention is to solve the above-mentioned problems.

[0009] According to one embodiment of the present invention, there is provided a fluid pressure cylinder as follows, comprising: a cylinder portion, the cylinder portion having a cylinder barrel forming a piston chamber and a piston accommodated in the piston chamber and capable of sliding along the axial direction of the cylinder barrel; an adapter unit portion, the adapter unit portion being mounted on the cylinder barrel in a manner that allows loading and unloading; and a positioning component, the positioning component positioning the adapter unit portion relative to the cylinder portion, the cylinder barrel having a first input / output port and a second input / output port, the first input / output port and the second input / output port being connected to the piston chamber and being used to supply and discharge pressure fluid to the piston chamber, the adapter unit portion having: a first mounting hole, the first mounting hole being provided for mounting a first supply / discharge pipe connected to the first input / output port; a second mounting hole, the second mounting hole being provided for mounting a second supply / discharge pipe connected to the second input / output port; and a position sensor, the position sensor detecting the position of the piston, the adapter unit portion being capable of loading and unloading relative to the cylinder portion while maintaining the position sensor, and the adapter unit portion being positioned and fixed to the cylinder barrel via the positioning component.

[0010] According to the above structure, the adapter unit connected with the first supply and exhaust pipe and the second supply and exhaust pipe and holding the position sensor can be removed from the cylinder. Therefore, for example, when replacing the sealing component in the cylinder with a new one, first, the adapter unit is separated from the cylinder, and then the cylinder is disassembled.

[0011] Thus, in the present invention, when performing maintenance on the cylinder part, it is not necessary to remove the first supply and discharge pipe, the second supply and discharge pipe, the position sensor, etc. from the adapter unit. Therefore, the maintenance operation process is reduced. In addition, the operation is simplified. That is, according to the present invention, it is possible to easily perform maintenance on the fluid pressure cylinder.

[0012] Furthermore, the mounting position of the position sensor relative to the adapter unit is the same before and after the adapter unit is removed from the cylinder. Therefore, after the adapter unit is mounted on the cylinder, the position sensor and the piston can be aligned by positioning the piston at a predetermined position. Therefore, even when the operator cannot visually check the piston, it is easy to align the piston and the position sensor.

[0013] Furthermore, by coupling the cylinder and the adapter unit with the positioning member, the adapter unit can be easily positioned and fixed to the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic overall perspective view of an air cylinder (fluid pressure cylinder) according to an embodiment of the present invention.

[0015] Figure 2This is an exploded perspective view showing the air cylinder separated into a cylinder portion and an adapter unit portion.

[0016] Figure 3 It is a side cross-sectional view of the cylinder along the axial direction.

[0017] Figure 4 This is an exploded perspective view of the adapter unit.

[0018] Figure 5 It means the piston moves from Figure 3 This is a side cross-sectional view of the moving state. DETAILED DESCRIPTION

[0019] Hereinafter, an air cylinder is exemplified as a fluid pressure cylinder for explanation. Therefore, the pressure fluid is compressed air. In addition, the fluid pressure cylinder may also be a hydraulic cylinder. In this case, the pressure fluid is working oil. In addition, the air cylinder exemplified is a single-rod cylinder, but it may also be a double-rod cylinder.

[0020] The X direction shown in the drawings is the axial direction of the cylinder or cylinder barrel. The X1 direction and the X2 direction along the X direction are opposite directions to each other. The Y direction shown in the drawings is a horizontal direction orthogonal to the X direction. The Y1 direction and the Y2 direction along the Y direction are opposite directions to each other. The Z direction shown in the drawings is an up-down direction orthogonal to the X direction and the Y direction. The Z1 direction along the Z direction is downward, and the Z2 direction along the Z direction is upward.

[0021] Figure 1 It is a schematic overall perspective view of the cylinder 10 according to the present embodiment. Figure 2 It is an exploded perspective view of the cylinder 10 . Figure 3 1 is a side cross-sectional view of the cylinder 10 along the axial direction. Figure 1 to Figure 3 As shown, the air cylinder 10 includes a cylinder portion 12 and an adapter unit portion 14 .

[0022] The cylinder portion 12 has a cylinder barrel 16. Figure 3 As shown, the X1 side end of the cylinder 16 is a closed end provided with a closing portion 17. The X2 side end of the cylinder 16 is an open end, which is closed by a cover member 18. The cover member 18 is positioned and fixed to the cylinder 16 via a retaining ring 20. An internal space is formed in the cylinder 16 by the closing portion 17 and the cover member 18. The internal space is a piston chamber 22.

[0023] The cover member 18 has an insertion hole 24 formed therein. The piston rod 26 passes through the insertion hole 24. An inner annular groove 28 is formed on the inner peripheral wall of the insertion hole 24, and an inner sealing member 30 is accommodated in the inner annular groove 28. The inner sealing member 30 airtightly seals between the inner peripheral wall of the insertion hole 24 and the side peripheral wall of the piston rod 26. An outer annular groove 32 is formed on the outer peripheral wall of the cover member 18. An outer sealing member 34 is accommodated in the outer annular groove 32. The outer sealing member 34 airtightly seals between the outer peripheral wall of the cover member 18 and the inner peripheral wall of the piston chamber 22.

[0024] The X1 side end of the piston rod 26 enters the piston chamber 22. The piston 38 is installed at the X1 side end of the piston rod 26. In other words, the piston 38 is accommodated in the piston chamber 22 in a state of being connected to the X1 side end of the piston rod 26. A connecting hole 40 is formed at the X2 side end of the piston rod 26. A part of a workpiece not shown is inserted into the connecting hole 40. Therefore, when the piston 38 is displaced in the piston chamber 22, the piston rod 26 and the workpiece are displaced integrally with the piston 38. In addition, the so-called workpiece is, for example, a predetermined fixture.

[0025] The piston 38 divides the piston chamber 22 into a first chamber 42 and a second chamber 44. The first chamber 42 is a space surrounded by the X1 side end face of the piston 38, the inner surface (X2 side end face) of the sealing portion 17 facing the piston chamber 22, and the inner peripheral wall of the piston chamber 22. The second chamber 44 is a space surrounded by the X2 side rear end face of the piston 38, the inner surface (X1 side end face) of the cover member 18 facing the piston chamber 22, and the inner peripheral wall of the piston chamber 22.

[0026] An annular gasket mounting groove 46 and an annular magnet mounting groove 48 are formed on the outer peripheral wall of the piston 38. A gasket 50 is accommodated in the gasket mounting groove 46. The gasket 50 prevents the compressed air in the first chamber 42 from leaking into the second chamber 44. Similarly, the compressed air in the second chamber 44 is also prevented from leaking into the first chamber 42. A magnet 52 is mounted in the magnet mounting groove 48.

[0027] like Figure 1 to Figure 3 As shown, the first protrusion 54a and the second protrusion 54b are respectively provided at the Y1 side end and the Y2 side end in the lower part of the cylinder 16. The third protrusion 54c is provided at the Y1 side end in the upper part of the cylinder 16. The first protrusion 54a to the third protrusion 54c extend along the axial direction (X direction) of the cylinder 16. Long holes 56 are formed in the first protrusion 54a to the third protrusion 54c, respectively. For example, a long bolt (not shown) for mounting the cylinder 10 on a predetermined device or machine or the like is inserted into the long hole 56.

[0028] A first flat portion 60, a second flat portion 62, and a third flat portion 64 are formed on the upper surface of the cylinder 16 (see Figure 2 ). The first flat portion 60 has a plane provided on the upper surface of the third protrusion 54c. The second flat portion 62 is adjacent to the first flat portion 60 via the first step portion 66. The second flat portion 62 is a flat surface parallel to the axial direction (X direction) of the cylinder 16 and parallel to the Y direction. A first groove 68 is formed in the first step portion 66, which is recessed toward the Y1 side. The first groove 68 extends along the axial direction (X direction) of the cylinder 16.

[0029] The third flat portion 64 is a flat surface parallel to the axial direction (X direction) of the cylinder 16 and parallel to the Y direction. The third flat portion 64 is located at the Y2 side end portion where the first to third protrusions 54a, 54c are not provided in the upper part of the cylinder 16. The third flat portion 64 is adjacent to the second flat portion 62 via the second step portion 70. Figure 1 and Figure 2 As can be understood, the first flat portion 60 is the highest position and the third flat portion 64 is the lowest position. The Y2 side end of the third flat portion 64 slightly protrudes from the Y2 side end of the curved side of the cylinder 16. Thus, a first protruding end 72 is formed in the cylinder 16. The first protruding end 72 extends in the axial direction of the cylinder 16.

[0030] The cylinder tube 16 has a cylinder-side engaging portion 73 that can engage with an adapter-side engaging portion 97 described later. The cylinder-side engaging portion 73 has the first concave groove 68 and the first protruding end 72 described above.

[0031] The second flat portion 62 and the third flat portion 64 each have a flat surface extending in the axial direction (X direction) of the cylinder 16. Each flat surface of the second flat portion 62 and the third flat portion 64 supports the adapter unit 14. That is, the second flat portion 62 and the third flat portion 64 are adapter support surfaces.

[0032] like Figure 2 and Figure 3 As shown in FIG. 1 , a first seal receiving hole 74 a, a second seal receiving hole 74 b and an engagement recess 76 are formed in the third flat portion 64 . Figure 3 As shown, the first seal member 80a and the second seal member 80b are housed in the first seal member housing hole 74a and the second seal member housing hole 74b, respectively. The first seal member 80a and the second seal member 80b hermetically seal the space between the cylinder 16 and a base material 82 (described later) constituting the adapter unit 14.

[0033] A first input / output port 84a is opened at the bottom surface of the first seal member receiving hole 74a. The first input / output port 84a extends toward the first chamber 42 and communicates with the first chamber 42. A second input / output port 84b is opened at the bottom surface of the second seal member receiving hole 74b. The second input / output port 84b extends toward the second chamber 44 and communicates with the second chamber 44.

[0034] The engaging recess 76 is located between the first input / output port 84a and the second input / output port 84b. The engaging recess 76 is provided for inserting one end of a positioning pin 86 (positioning member) described later. The engaging recess 76 is, for example, a bottomed hole. The positioning pin 86 constrains the adapter unit 14 to the cylinder 16. As a result, the adapter unit 14 is positioned relative to the cylinder 12.

[0035] Next, the adapter unit 14 will be described. The adapter unit 14 has Figure 4 The substrate 82 shown in FIG. 8 has a first bottom portion 90 that abuts against the second flat portion 62 of the cylinder 16 and a second bottom portion 92 that abuts against the third flat portion 64 of the cylinder 16. The first bottom portion 90 and the second bottom portion 92 are flat surfaces.

[0036] In the base material 82, a second protruding end 96 is provided at the Y1 side end portion 94 facing the first flat portion 60 of the cylinder tube 16. Figure 2 As shown, the second protruding end 96 extends from the first bottom 90 toward the first groove 68 and is inserted into the first groove 68. The second protruding end 96 extends along the axial direction of the cylinder tube 16. The adapter unit portion 14 has an adapter side engaging portion 97 that can engage with the cylinder side engaging portion 73. The second protruding end 96 of the base material 82 is one of the adapter side engaging portions 97 and engages with the first groove 68.

[0037] In the base material 82, the Y2 side end portion 98, which is the end portion on the opposite side to the Y1 side end portion 94, extends in a manner covering the first protruding end 72. A third protruding end 100 is provided below the Y2 side end portion 98. The third protruding end 100 protrudes in the Y1 direction similarly to the second protruding end 96. The second bottom portion 92, the Y2 side end portion 98, and the third protruding end 100 form a second groove 102. The second groove 102 extends along the axial direction of the cylinder 16. The first protruding end 72 of the cylinder 16 is inserted into the second groove 102 (see in particular Figure 1 ). Thus, the second groove 102 of the base material 82 is another one of the adapter-side engaging portions 97 , and is engaged with the first protruding end 72 .

[0038] like Figure 4 As shown, pin holes 104a, 106a, 108a, and 110a are formed at the Y2 side end portion 98. The pin holes 104a, 106a, 108a, and 110a extend in the Y1 direction. Legs 114a and 114b of a first sliding pin 112a in a U shape are inserted into the pin holes 104a and 106a, respectively. Legs 114c and 114d of a second sliding pin 112b in a U shape are inserted into the pin holes 108a and 110a, respectively.

[0039] A first mounting hole 116a and a second mounting hole 116b are formed on the upper surface of the substrate 82. The first mounting hole 116a and the second mounting hole 116b extend in the up-down direction (Z direction). The pin hole 104a and the pin hole 106a are connected to the first mounting hole 116a. Here, in the inner peripheral wall of the first mounting hole 116a, the pin hole 104b and the pin hole 106b are respectively formed at the positions arranged on the same axis of the pin hole 104a and the pin hole 106a. In other words, the pin hole 104a and the pin hole 104b are arranged via the first mounting hole 116a, and the pin hole 106a and the pin hole 106b are arranged via the first mounting hole 116a.

[0040] An inner diameter difference is provided near the bottom wall of the first mounting hole 116a. Based on the inner diameter difference, a first annular step portion 120a is provided in the first mounting hole 116a. A first connecting hole 122a is formed in the bottom wall of the first mounting hole 116a. A thin wall portion 124a near the first connecting hole 122a presses the first sealing member 80a.

[0041] Insert the first pipe joint 128a into the first mounting hole 116a. Figure 3 and Figure 4 As shown, the first pipe joint 128a is a cylindrical body having a small diameter portion 130a with a small outer diameter and a large diameter portion 132a with a large outer diameter. An annular first mounting groove 134a is formed on the outer peripheral wall of the small diameter portion 130a. A first joint sealing member 136a is mounted in the first mounting groove 134a. An annular first engaging groove 138a is formed on the outer peripheral wall of the large diameter portion 132a. The legs 114a and 114b of the first sliding pin 112a engage with the first engaging groove 138a.

[0042] Specifically, when the first pipe joint 128a is inserted into the first mounting hole 116a, Figure 3 As shown, the lower surface of the small diameter portion 130a abuts against the thin wall portion 124a, and the lower surface of the large diameter portion 132a abuts against the first annular step portion 120a. In this state, the legs 114a and 114b of the first sliding pin 112a are inserted into the pin hole 104a and the pin hole 106a, respectively. The top ends of the legs 114a and 114b protrude from the pin hole 104a and the pin hole 106a, respectively, and after passing through the first engaging groove 138a of the first pipe joint 128a, enter the pin hole 104b and the pin hole 106b, respectively.

[0043] As a result, the axially approximately middle portion of the legs 114a, 114b engages with the first engagement groove 138a. As a result, the first pipe joint 128a is clamped by the legs 114a, 114b, preventing the first pipe joint 128a from being separated from the first mounting hole 116a. The first joint sealing member 136a seals between the outer peripheral wall of the small diameter portion 130a of the first pipe joint 128a and the inner peripheral wall of the first mounting hole 116a.

[0044] Similarly to the above, the pin holes 108a and 110a are connected to the second mounting hole 116b. The pin holes 108b and 110b are formed in the inner peripheral wall of the second mounting hole 116b at locations aligned on the same axis as the pin holes 108a and 110a.

[0045] Similarly, near the bottom wall of the second mounting hole 116b, a second annular step portion 120b is provided based on the inner diameter difference of the second mounting hole 116b. A second connecting hole 122b is formed in the bottom wall of the second mounting hole 116b. The thin wall portion 124b near the second connecting hole 122b presses the second sealing member 80b.

[0046] Insert the second pipe joint 128b into the second mounting hole 116b. Figure 3 As shown, the shape of the second pipe joint 128b is the same as that of the first pipe joint 128a. That is, the second pipe joint 128b has a small diameter portion 130b and a large diameter portion 132b. A second mounting groove 134b is formed on the outer peripheral wall of the small diameter portion 130b, and a second joint sealing member 136b is mounted in the second mounting groove 134b. A second engaging groove 138b is formed on the outer peripheral wall of the large diameter portion 132b. The legs 114c and 114d of the second sliding pin 112b engage with the second engaging groove 138b.

[0047] When the second pipe joint 128b is inserted into the second mounting hole 116b, the lower surface of the small diameter portion 130b abuts against the thin wall portion 124b, and the lower surface of the large diameter portion 132b abuts against the second annular step portion 120b. In this state, the leg portion 114c of the second slide pin 112b is inserted into the pin hole 108b via the pin hole 108a and the second mounting hole 116b, and the leg portion 114d is inserted into the pin hole 110b via the pin hole 110a and the second mounting hole 116b. As a result, the second pipe joint 128b is clamped by the leg portions 114c and 114d, and the second pipe joint 128b is prevented from being separated from the second mounting hole 116b. The second joint sealing member 136b seals between the outer peripheral wall of the small diameter portion 130b of the second pipe joint 128b and the inner peripheral wall of the second mounting hole 116b.

[0048] Furthermore, the first pipe joint 128a and the second pipe joint 128b may be connected to the base material 82 via screws.

[0049] like Figure 1 to Figure 3As shown, the top end of the first supply and exhaust pipe 140a is connected to the first pipe joint 128a, and the top end of the second supply and exhaust pipe 140b is connected to the second pipe joint 128b. The other ends of the first supply and exhaust pipe 140a and the second supply and exhaust pipe 140b, which are not shown in the figure, are respectively connected to supply and exhaust mechanisms, which are not shown in the figure. Compressed air flows through the first supply and exhaust pipe 140a and the second supply and exhaust pipe 140b.

[0050] like Figure 1 , Figure 2 and Figure 4 As shown, an insertion hole 144 is formed on the upper surface of the substrate 82 between the first mounting hole 116a and the second mounting hole 116b. Figure 3 As shown, the insertion hole 144 penetrates the base material 82 in the Z direction. The insertion hole 144 overlaps with the engagement recess 76. The positioning pin 86 is inserted into the overlapping engagement recess 76 and the insertion hole 144. The adapter unit 14 is positioned and fixed to the cylinder 16 by this insertion.

[0051] In addition, a first sensor mounting groove 146a is formed on the upper surface of the substrate 82 near the Y1 side end portion 94. In addition, a second sensor mounting groove 146b is formed adjacent to the first sensor mounting groove 146a. The second sensor mounting groove 146b is closer to the first pipe joint 128a and the second pipe joint 128b than the first sensor mounting groove 146a. The first position sensor 148a is accommodated in the first sensor mounting groove 146a, and the second position sensor 148b is accommodated in the second sensor mounting groove 146b. The upper surfaces of the first position sensor 148a and the second position sensor 148b are at substantially the same position as the upper surface of the substrate 82. In addition, the first position sensor 148a and the second position sensor 148b are electrically connected to a control unit (not shown) via cables 150a and 150b, respectively.

[0052] The cylinder 10 according to the present embodiment is basically configured as described above. Next, the effects of the cylinder 10 will be described.

[0053] The workpiece is connected to the piston rod 26. Specifically, a part of the workpiece is inserted into the connection hole 40 of the piston rod 26. The air cylinder 10 operates in this state.

[0054] Figure 3The figure shows a state in which the working air of the first chamber 42 is exhausted and the working air is supplied to the second chamber 44. In this case, since the internal pressure of the second chamber 44 is higher than the internal pressure of the first chamber 42, the piston 38 is pressed by the working air in the second chamber 44 and moves in the X1 direction, and is located at the first position closest to the sealing portion 17. When the piston 38 is moved in the X2 direction from this state, the working air is supplied to the first chamber 42 and the working air is exhausted from the second chamber 44. Specifically, the working air is sent to the first chamber 42 from the above-mentioned supply and exhaust mechanism. After the working air circulates in the first supply and exhaust pipe 140a, it flows into the first input and output port 84a through the first connecting hole 122a. The working air flows into the first chamber 42 after passing through the first input and output port 84a. As a result, the internal pressure of the first chamber 42 rises.

[0055] On the other hand, the operating air in the second chamber 44 is exhausted by the supply and exhaust mechanism. The operating air in the second chamber 44 flows into the second supply and exhaust pipe 140b through the second input and output port 84b and the second connecting hole 122b in sequence. As a result, the operating air in the second chamber 44 is exhausted through the second supply and exhaust pipe 140b. As a result, the internal pressure of the second chamber 44 decreases.

[0056] As the internal pressure difference is generated between the first chamber 42 and the second chamber 44 as described above, the piston 38 receives pressure from the working air in the first chamber 42. As a result, the piston 38 slides. That is, the piston 38 moves toward the cover member 18 located at the end on the X2 side. As a result, the cylinder 10 becomes Figure 5 The status shown. Figure 5 In the embodiment, the piston 38 is located at the second position. As a result, the workpiece connected to the piston rod 26 moves. The second position sensor 148b detects the magnetic force of the magnet 52 and detects that the piston 38 has reached the second position. The control unit receives the detection signal from the second position sensor 148b and recognizes that the piston 38 has moved to the second position.

[0057] In order to return the piston 38 to Figure 3 In the state shown, the operating air is sent from the supply and exhaust mechanism to the second chamber 44, and the operating air is exhausted from the first chamber 42 through the supply and exhaust mechanism. The operating air in the first chamber 42 flows into the first supply and exhaust pipe 140a through the first input and output port 84a and the first communication hole 122a in sequence. As a result, the operating air in the first chamber 42 is exhausted through the first supply and exhaust pipe 140a, so the internal pressure of the first chamber 42 decreases.

[0058] The operating air sent from the supply and exhaust mechanism flows through the second supply and exhaust pipe 140b, and then flows into the second chamber 44 through the second connecting hole 122b and the second input and output port 84b. As a result, the internal pressure of the second chamber 44 rises. As the internal pressure difference is generated between the first chamber 42 and the second chamber 44 as described above, the piston 38 slides. That is, the piston 38 moves toward the sealing portion 17 located at the end on the X1 side and reaches the first position. As a result, the cylinder 10 returns to the Figure 3 At this time, the workpiece connected to the piston rod 26 also moves. The first position sensor 148a detects the magnetic force of the magnet 52 and detects that the piston 38 has reached the first position. The control unit receives the detection signal from the first position sensor 148a and recognizes that the piston 38 has moved to the first position.

[0059] When the piston 38 repeatedly performs the above-mentioned reciprocating motion, the gasket 50 and the inner sealing member 30 mounted on the outer peripheral wall of the piston 38 repeatedly slide in contact with the inner peripheral wall of the piston chamber 22 and the side peripheral wall of the piston rod 26, respectively. The gasket 50 and the inner sealing member 30 are worn by this sliding contact. When the gasket 50 and the inner sealing member 30 are excessively worn, compressed air leaks between the first chamber 42 and the second chamber 44, making it difficult to move the piston 38. In order to avoid this, the gasket 50 and the inner sealing member 30 are replaced with new ones.

[0060] Therefore, the adapter unit 14 is disengaged from the cylinder 12. Specifically, the operator who performs maintenance holds the positioning pin 86 with fingers or the like and pulls it in the Z2 direction. As a result, the positioning pin 86 is disengaged from the engaging recess 76 and the insertion hole 144. As a result, the substrate 82 is released from the constraint of the positioning pin 86. At this moment, since the second protruding end 96 is engaged with the first groove 68 and the first protruding end 72 is engaged with the second groove 102, the relative movement of the adapter unit 14 in the Z direction with respect to the cylinder 12 is prevented. Therefore, the adapter unit 14 is prevented from falling off from the cylinder 12.

[0061] Then, if Figure 2 As shown, the operator pulls the substrate 82 in the Y2 direction. That is, the substrate 82 is slid in the Y2 direction. At this time, the first bottom 90 and the second bottom 92 of the substrate 82 are in sliding contact along the second flat portion 62 and the third flat portion 64 of the cylinder 16. Since the first bottom 90, the second bottom 92, the second flat portion 62, and the third flat portion 64 are all flat surfaces, the operator can easily slide the substrate 82 in the Y2 direction while in sliding contact with the cylinder 16.

[0062] As the sliding occurs, the engagement of the second protruding end 96 with the first groove 68 is released, and the engagement of the first protruding end 72 with the second groove 102 is released. As a result, the constraint of the cylinder 16 on the base material 82 is released. Thus, the base material 82 can be easily separated from the cylinder 16. That is, according to the present embodiment, the adapter unit 14 can be separated from the cylinder 12 in a state where the first pipe joint 128a, the first supply and exhaust pipe 140a, the second pipe joint 128b, and the second supply and exhaust pipe 140b are connected to the base material 82. In addition, there is no need to remove the first position sensor 148a and the second position sensor 148b from the base material 82. There is no need to remove the cables 150a and 150b that electrically connect the first position sensor 148a and the second position sensor 148b to the control unit from the base material 82.

[0063] Here, as described above, the upper surfaces of the first position sensor 148a and the second position sensor 148b are at substantially the same position as the upper surface of the substrate 82. Therefore, it is avoided that the upper surfaces of the first position sensor 148a and the second position sensor 148b interfere with certain objects after the adapter unit 14 is separated from the cylinder 12. Therefore, it is avoided that the first position sensor 148a and the second position sensor 148b malfunction due to interference. In other words, the first position sensor 148a and the second position sensor 148b are protected based on the first position sensor 148a being installed in the first sensor installation groove 146a and the second position sensor 148b being installed in the second sensor installation groove 146b.

[0064] Next, the operator replaces the cylinder 12 with a spare, for example. To this end, the operator loosens the long bolts or the like that connect the cylinder 12 to the device or equipment, etc. Thus, the cylinder 12 is removed from the device or equipment, etc.

[0065] Next, the operator slides the adapter unit 14 from the Y2 direction toward the Y1 direction along the second flat portion 62 and the third flat portion 64 of the preliminary product. For the same reason as above, the operator can easily slide the base material 82 toward the Y1 direction while making the first bottom portion 90 and the second bottom portion 92 of the base material 82 slide in contact with the second flat portion 62 and the third flat portion 64 of the cylinder 16, respectively. As the base material 82 slides in this way, the second protruding end 96 is inserted into the first groove 68, and the first protruding end 72 is inserted into the second groove 102. Thus, the base material 82 is temporarily restrained by the cylinder 16.

[0066] Furthermore, the operator performs the alignment between the insertion hole 144 and the engagement recess 76. After that, the operator inserts the positioning pin 86 into the insertion hole 144. The tip of the positioning pin 86 passes through the insertion hole 144 and is inserted into the engagement recess 76, so that the base material 82 is restrained by the cylinder 16. That is, the adapter unit 14 is positioned in the cylinder 16.

[0067] During the operation of separating the adapter unit 14 from the cylinder 12 and the operation of attaching the spare part to the adapter unit 14, the first position sensor 148a and the second position sensor 148b remain attached to the base material 82. Therefore, in the spare part, it is not particularly necessary to perform the operation of aligning the first position sensor 148a and the second position sensor 148b with the piston 38. This also simplifies the maintenance operation.

[0068] After that, the user of the air cylinder 10 activates the reserve. During this period, the operator disassembles the cylinder portion 12. For example, the operator removes the retaining ring 20 and the cover member 18 from the cylinder tube 16, and takes out the piston rod 26 and the piston 38 from the piston chamber 22. Next, the operator removes the gasket 50 from the piston 38 and replaces it with a new one. In addition, the operator removes the inner sealing member 30 from the cover member 18 and replaces it with a new one. Thereafter, the cylinder portion 12 is assembled in the reverse order of the above.

[0069] When the maintenance time of the spare parts comes, the spare parts and the cylinder part 12 that has been maintained are replaced in the same manner as described above. Thus, by using the spare parts, the operation stop time of the predetermined equipment in which the cylinder 10 is installed can be shortened.

[0070] In addition, according to the present embodiment, when performing maintenance on the cylinder portion 12, it is not necessary to remove the first pipe joint 128a, the first supply and exhaust pipe 140a, the second pipe joint 128b, the second supply and exhaust pipe 140b, the first position sensor 148a, and the second position sensor 148b from the base material 82. In other words, it is not necessary to disassemble the adapter unit 14. Therefore, the maintenance operation process is reduced. In addition, the maintenance operation becomes simple.

[0071] Furthermore, since the cover member 18 is removed from the cylinder 16 , the outer seal member 34 can also be replaced.

[0072] When replacing the first sealing member 80a and the second sealing member 80b with new ones, the operator separates the adapter unit 14 from the cylinder 12 in the same manner as described above to expose the first sealing member receiving hole 74a and the second sealing member receiving hole 74b. Thereafter, the operator takes out the first sealing member 80a and the second sealing member 80b from the first sealing member receiving hole 74a and the second sealing member receiving hole 74b, respectively, and replaces them with new ones.

[0073] When replacing the first joint sealing component 136a and the second joint sealing component 136b with new ones, the operator slides the first sliding pin 112a and the second sliding pin 112b in the Y2 direction. As a result, the first sliding pin 112a and the second sliding pin 112b are separated from the base material 82. As a result, the first pipe joint 128a and the second pipe joint 128b are released from the constraints of the first sliding pin 112a and the second sliding pin 112b, respectively. Next, the operator pulls the first pipe joint 128a and the second pipe joint 128b in the Z2 direction. As a result, the first joint sealing component 136a installed on the first pipe joint 128a and the second joint sealing component 136b installed on the second pipe joint 128b are exposed. Thereafter, the operator removes the first joint sealing component 136a and the second joint sealing component 136b from the first pipe joint 128a and the second pipe joint 128b, respectively, and replaces them with new ones.

[0074] As described above, according to the present embodiment, all sealing members such as the inner sealing member 30 and the second joint sealing member 136 b can be replaced by a simple operation. That is, maintenance of the cylinder 10 can be easily performed.

[0075] As described above, the present embodiment provides a fluid pressure cylinder as follows, comprising: a cylinder portion 12, the cylinder portion having a cylinder barrel 16 formed with a piston chamber 22 and a piston 38 accommodated in the piston chamber and capable of sliding along the axial direction of the cylinder barrel; an adapter unit portion 14, the adapter unit portion being mounted on the cylinder barrel in a manner that allows loading and unloading; and a positioning component 86, the positioning component positioning the adapter unit portion relative to the cylinder portion, the cylinder barrel having a first input / output port 84a and a second input / output port 84b, the first input / output port and the second input / output port being connected to the piston chamber and used for The piston chamber supplies and discharges pressure fluid, and the adapter unit has: a first mounting hole 116a, which is used to mount a first supply and discharge pipe 140a connected to the first input and output port; a second mounting hole 116b, which is used to mount a second supply and discharge pipe 140b connected to the second input and output port; and position sensors 148a, 148b, which detect the position of the piston. The adapter unit can be loaded and unloaded relative to the cylinder part while maintaining the position sensor, and the adapter unit is positioned and fixed to the cylinder barrel via the positioning component.

[0076] According to this structure, the adapter unit connected with the first supply and exhaust pipe and the second supply and exhaust pipe and holding the position sensor can be removed from the cylinder. Therefore, for example, when replacing the sealing component in the cylinder with a new one, first, the adapter unit is separated from the cylinder, and then the cylinder is disassembled.

[0077] Thus, according to the above structure, when performing maintenance on the cylinder part, it is not necessary to remove the first supply and discharge pipe, the second supply and discharge pipe, the position sensor, etc. from the adapter unit. Therefore, the maintenance operation process is reduced. In addition, the operation is simplified. That is, the fluid pressure cylinder can be easily maintained.

[0078] Furthermore, the mounting position of the position sensor relative to the adapter unit is the same before and after the adapter unit is removed from the cylinder. Therefore, after the adapter unit is mounted on the cylinder, the position sensor and the piston can be aligned by positioning the piston at a predetermined position. Therefore, even when the operator cannot visually check the piston, it is easy to align the piston and the position sensor.

[0079] Furthermore, by coupling the cylinder and the adapter unit with the positioning member, the adapter unit can be easily positioned and fixed to the cylinder.

[0080] This embodiment discloses a fluid pressure cylinder, wherein the adapter unit has an insertion hole 144 , and the cylinder tube has an engagement recess 76 , and one end of the positioning member is inserted through and engaged with the insertion hole.

[0081] One end of the positioning member is inserted into the hole and engaged with the engaging recess, thereby positioning and fixing the adapter unit to the cylinder. As a result, the adapter unit is prevented from falling off the cylinder during use of the fluid pressure cylinder. Therefore, positional displacement between the first input / output port and the second input / output port formed on the cylinder and the first supply and discharge pipe and the second supply and discharge pipe provided on the adapter unit is also prevented.

[0082] This embodiment discloses a fluid pressure cylinder, wherein the engaging recess is located between the first input / output port and the second input / output port, and the insertion hole is located between the first mounting hole and the second mounting hole.

[0083] In this case, the so-called dead space between the first input / output port and the second input / output port is avoided. That is, the space between the first input / output port and the second input / output port can be effectively utilized. The same is true for the space between the first mounting hole and the second mounting hole.

[0084] This embodiment discloses a fluid pressure cylinder, wherein the cylinder tube has adapter support surfaces 90 and 92 for supporting the adapter unit, and the adapter unit slides along the adapter support surfaces so that the adapter unit can be attached to and detached from the cylinder part.

[0085] In this structure, the adapter unit can be mounted on the cylinder by sliding the adapter unit along the adapter support surface. When the adapter unit is detached from the cylinder, the adapter unit is also slid along the adapter support surface. Thus, according to this embodiment, the adapter unit can be easily mounted and dismounted relative to the cylinder.

[0086] The present embodiment discloses a fluid pressure cylinder, wherein the adapter support surface has a flat surface extending along the axial direction.

[0087] In the flat surface, the adapter unit can slide easily along the adapter support surface. That is, in this case, the adapter unit can slide smoothly along the adapter support surface. Therefore, the adapter unit can be attached and detached from the cylinder more easily.

[0088] The present embodiment discloses a fluid pressure cylinder, wherein the cylinder barrel has a cylinder side engaging portion 68, and the adapter unit portion has an adapter side engaging portion 96 capable of engaging with the cylinder side engaging portion, and the engagement between the cylinder side engaging portion and the adapter side engaging portion prevents the cylinder barrel and the adapter unit portion from relative movement in a direction Z perpendicular to the adapter support surface.

[0089] The cylinder-side engaging portion and the adapter-side engaging portion are engaged with each other, thereby preventing the adapter unit from falling off the cylinder tube.

[0090] This embodiment discloses a fluid pressure cylinder, wherein the cylinder tube has a plurality of cylinder-side engaging portions 73 including the cylinder-side engaging portion, and the adapter unit has a plurality of adapter-side engaging portions 97 including the adapter-side engaging portion.

[0091] This makes it more difficult for the adapter unit to fall off from the cylinder.

[0092] The present embodiment discloses a fluid pressure cylinder, wherein the adapter unit portion comprises: a substrate 82, which is formed with the first mounting hole and the second mounting hole; a first sliding pin 112a and a second sliding pin 112b, which are installed on the substrate in a manner that allows them to be loaded and unloaded; a first pipe joint 128a, which is installed on the top end of the first supply and discharge pipe; and a second pipe joint 128b, which is installed on the top end of the second supply and discharge pipe, the first sliding pin installed on the substrate is engaged with the first pipe joint, thereby positioning and fixing the first pipe joint in the first mounting hole, and the second sliding pin installed on the substrate is engaged with the second pipe joint, thereby positioning and fixing the second pipe joint in the second mounting hole.

[0093] According to this structure, by attaching the first sliding pin and the second sliding pin to the base material, the first pipe joint and the second pipe joint can be positioned and fixed to the base material. Therefore, it is not necessary to screw the first sliding pin and the second sliding pin to the base material. In this way, according to this embodiment, it is easy to position and fix the first pipe joint and the second pipe joint to the base material. In addition, by attaching and detaching the first sliding pin and the second sliding pin from the base material, the first pipe joint and the second pipe joint can be easily detached from the base material.

[0094] The present embodiment discloses a fluid pressure cylinder, wherein the adapter unit has sensor mounting grooves 146 a and 146 b for mounting the position sensor.

[0095] In this case, the position sensor is accommodated in the sensor mounting groove. Therefore, for example, when the fluid pressure cylinder is maintained, the position sensor is prevented from interfering with certain objects. In other words, the position sensor is protected.

[0096] In addition, the present invention is not limited to the above disclosure, and various structures can be adopted without departing from the gist of the present invention.

[0097] Explanation of symbols

[0098] 10...Cylinder 12...Cylinder

[0099] 14 ... adapter unit 16 ... cylinder

[0100] 22…Piston chamber 26…Piston rod

[0101] 30 ... inner sealing member 34 ... outer sealing member

[0102] 38…Piston 50…Gasket

[0103] 52 ... magnet 60 ... first flat portion

[0104] 62 ... second flat portion 64 ... third flat portion

[0105] 68 ... first groove 72 ... first protruding end

[0106] 73...cylinder side engaging part 76...engaging recessed part

[0107] 80a... first sealing member 80b... second sealing member

[0108] 82 ...substrate 84a ...first input / output port

[0109] 84b…Second input / output port 86…Locking pin

[0110] 90...first bottom 92...second bottom

[0111] 96 ... second protruding end 97 ... adapter side engaging portion

[0112] 100 ... third protruding end 102 ... second groove

[0113] 112a...first sliding pin 112b...second sliding pin

[0114] 116a...first mounting hole 116b...second mounting hole

[0115] 122a...first communication hole 122b...second communication hole

[0116] 128a...first pipe joint 128b...second pipe joint

[0117] 136a ... first joint sealing member 136b ... second joint sealing member

[0118] 138a...first engaging groove 138b...second engaging groove

[0119] 140a...first supply and discharge pipe 140b...second supply and discharge pipe

[0120] 144 ... insertion hole 146a ... first sensor installation groove

[0121] 146b…Second sensor mounting groove 148a…First position sensor

[0122] 148b ...second position sensor.

Claims

1. A fluid pressure cylinder, characterized in that: The fluid pressure cylinder (10) comprises: A cylinder part (12) having a cylinder barrel (16) and a piston (38), wherein the cylinder barrel forms a piston chamber (22), and the piston is accommodated in the piston chamber and can slide along the axial direction of the cylinder barrel; An adapter unit (14) which is detachably mounted on the cylinder; as well as a positioning member (86) for positioning the adapter unit relative to the cylinder portion, The cylinder has a first input / output port (84a) and a second input / output port (84b), the first input / output port and the second input / output port being in communication with the piston chamber and used for supplying and discharging pressure fluid to the piston chamber. The adapter unit has: a first mounting hole (116a) for mounting a first supply and discharge pipe (140a) connected to the first input and output port; a second mounting hole (116b) for mounting a second supply and discharge pipe (140b) connected to the second input and output port; and a position sensor (148a, 148b) for detecting a position of the piston. The adapter unit can be attached to and detached from the cylinder while holding the position sensor. Furthermore, the adapter unit is positioned and fixed to the cylinder via the positioning member.

2. The fluid pressure cylinder according to claim 1, characterized in that: The adapter unit has an insertion hole (144), and the cylinder has an engagement recess (76). One end portion of the positioning member is inserted through and engaged with the insertion hole.

3. The fluid pressure cylinder according to claim 2, characterized in that: The engaging recess is located between the first input / output port and the second input / output port. The insertion hole is located between the first mounting hole and the second mounting hole.

4. The fluid pressure cylinder according to claim 1, characterized in that: The cylinder tube has an adapter support surface (90, 92) for supporting the adapter unit portion. The adapter unit portion is slidable along the adapter support surface, so that the adapter unit portion can be attached to and detached from the cylinder portion.

5. The fluid pressure cylinder according to claim 4, characterized in that: The adapter support surface has a flat surface extending along the axial direction.

6. The fluid pressure cylinder according to claim 5, characterized in that: The cylinder tube has a cylinder side engaging portion (68), and the adapter unit has an adapter side engaging portion (96) capable of engaging with the cylinder side engaging portion. The engagement between the cylinder-side engagement portion and the adapter-side engagement portion prevents the cylinder tube and the adapter unit portion from relative movement in a direction (Z) perpendicular to the adapter support surface.

7. The fluid pressure cylinder according to claim 6, characterized in that: The cylinder tube has a plurality of cylinder side engaging parts (73) including the cylinder side engaging part, and the adapter unit has a plurality of adapter side engaging parts (97) including the adapter side engaging part.

8. The fluid pressure cylinder according to claim 1, characterized in that: The adapter unit portion comprises: a base material (82), which is formed with the first mounting hole and the second mounting hole; a first sliding pin (112a) and a second sliding pin (112b), which are installed on the base material in a manner that allows them to be loaded and unloaded; a first pipe joint (128a), which is installed on the top end of the first supply and discharge pipe; and a second pipe joint (128b), which is installed on the top end of the second supply and discharge pipe, the first sliding pin installed on the base material engages with the first pipe joint, thereby positioning and fixing the first pipe joint in the first mounting hole, and the second sliding pin installed on the base material engages with the second pipe joint, thereby positioning and fixing the second pipe joint in the second mounting hole.

9. The fluid pressure cylinder according to any one of claims 1 to 8, characterized in that: The adapter unit has a sensor mounting groove (146a, 146b) for mounting the position sensor.

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