Thrust Augmentation Device

Abstract

To output high thrust amplified in a direction drawing to a device side.SOLUTION: A thrust expansion device 1 is formed by separating a part configuring a thrust expansion function from an air hydraulic cylinder having an input function inputting thrust and the thrust expansion function expanding and outputting inputted thrust and making the part independent of the air hydraulic cylinder. On a device body 2, a through-hole is formed in an axial direction, which is composed of a large-diameter portion configuring a cylinder portion 21, a middle diameter portion configuring a hydraulic chamber 6, and a small-diameter portion into which an output rod 5 is inserted, and penetrates with different three inner diameters. A piston 4 is arranged in the cylinder portion 21 of the large-diameter portion, and the output rod is formed on a side of the hydraulic chamber 6 with respect to the piston 4. Thereby, thrust inputted from a connected air cylinder 100 and expanded in the hydraulic chamber 6 acts in a direction in which the piston 4 moves to a cover portion 3 side, and the output rod 5 fixed to the piston 4 outputs the expansion thrust in a direction drawn into the inside of the device body 2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a thrust magnification device, and more particularly to a thrust magnification device that outputs an input pressure as an amplified thrust. [Background technology]

[0002] Fluid pressure cylinders using fluids such as air (gas) or oil (liquid) are used in a wide range of industrial fields. These fluid pressure cylinders can be the driving force for various mechanical operations, such as driving presses and actuators, by generating thrust on the piston inside the cylinder using the pressure of the fluid. One such fluid pressure cylinder is the air-hydro cylinder, which converts air pressure into hydraulic pressure inside the cylinder (Patent Document 1). In this air-hydro cylinder, an air cylinder (input side) and a hydraulic cylinder (output side) that amplifies thrust are integrated into a common cylinder, with an air piston driven by air arranged on the input side of the cylinder, and a hydraulic piston and output rod that are driven using the output of the air piston as input are arranged on the output side.

[0003] In the air-hydro cylinder described in Patent Document 1, the input air cylinder section and the output hydraulic cylinder section (thrust magnification mechanism section) are formed as one unit, so if it becomes necessary to change the stroke of the different air cylinder sections, it is necessary to replace the entire air-hydro cylinder. Therefore, Patent Document 2 proposes a technology in which an air-hydro cylinder has a first function of inputting thrust and a second function of amplifying and outputting the input thrust, and the part constituting the second function is separated and an independent thrust magnification device is formed.

[0004] However, in both devices, although the amplified thrust was output from the output shaft, the output direction was limited to a direction pushing outward as viewed from the device, and it was not possible to obtain a high thrust in the retracting direction. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4895342 [Patent Document 2] JP 2020-076495 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to make it possible to output an amplified high thrust in a direction that retracts the output rod toward the device. [Means for solving the problem]

[0007] (1) The invention described in claim 1 is a thrust magnifying device that amplifies and outputs a thrust input from an input actuator by connecting the thrust magnifying device to the input actuator, the thrust magnifying device comprising: a device body having a cylinder; a piston disposed in the cylinder and moving in an axial direction of the cylinder; and an output rod disposed on one surface of the piston. The cylinder a fluid pressure chamber in which a liquid is filled, the inner circumferential surface and the one surface of the piston being part of a partition wall; an input port that penetrates from a side surface of the device body to the fluid pressure chamber and through which an input rod of the input actuator is inserted; and an input fixing means that fixes the input actuator, with the input rod inserted into the input port, to the device body. The input port is disposed at a position where an input rod of an input actuator fixed to an input fixing means does not interfere with the output rod. The present invention provides a thrust magnification device. (2) In the invention described in claim 2, When viewed from a direction in which the input actuator is inserted from the input port and a direction perpendicular to the length direction of the output rod, 2. The thrust magnification device according to claim 1, wherein the fluid pressure chamber is penetrated from the device body in a direction intersecting the output rod. (3) In the invention described in claim 3, there is provided the thrust magnification device according to claim 1 or 2, characterized in that the input fixing means is formed on a side surface of the device body extending in the axial direction. (4) The invention described in claim 4 provides the thrust magnification device described in claim 1, claim 2 or claim 3, characterized in that an outer peripheral surface of the device body has a side extending in an axial direction formed as a flat surface, and the input fixing means has a screw hole for fixing the input actuator formed on the flat surface. (5) In a fifth aspect of the present invention, there is provided a thrust magnification device according to any one of the first to fourth aspects, characterized in that a plurality of the input ports and the input fixing means are formed. (6) The invention recited in claim 6 provides the thrust magnification device recited in claim 5, further comprising a sealing lid for sealing the input port where no input actuator is provided, and a lid fixing means for fixing the sealing lid to the device body. (7) In a seventh aspect of the present invention, there is provided the thrust magnification device according to the sixth aspect, wherein the input fixing means also serves as the lid fixing means. ( 8 )Claims 8 In the invention described in the above, the input port is formed beyond the fluid pressure chamber when viewed from the input fixing means side. Any one of claims 1 to 7 The present invention provides a thrust magnification device as described above. ( 9 )Claims 9 In the invention described in the above, the input port is a bottomed recess formed in the device body up to a position just before the side surface opposite the input fixing means. Claim 8 The present invention provides a thrust magnification device as described above. ( 10 )Claims 10 In the invention described in the above, the input port penetrates the entire device body and includes a sealing means for sealing the input port penetrating the entire device body on the opposite side to the input fixing means. Claim 8 The present invention provides a thrust magnification device as described above. ( 11 )Claims 11 In the invention described in the above, the sealing means has an extended recess that is continuous with the input port and through which the input rod is inserted. Claim 10The present invention provides a thrust magnification device as described above. Effect of the Invention

[0008] According to the present invention, a fluid pressure chamber is formed on the side of an output rod disposed on a piston arranged in a cylinder, and an input port for an input actuator penetrates from the side of the device main body to the fluid pressure chamber, so that an amplified high thrust can be output in the direction of retracting the output rod toward the device. Furthermore, since the input fixing means is provided for fixing the input actuator, the input rod of which is inserted into the input port, to the device body, various input actuators can be easily fixed and replaced. [Brief description of the drawings]

[0009] [Figure 1] 1A to 1C are explanatory diagrams illustrating a first embodiment of a thrust magnification device. [Diagram 2] 1 is an explanatory diagram of an example of use of a thrust magnification device. FIG. [Diagram 3] 10A to 10C are explanatory diagrams of a second embodiment of the thrust magnification device and an example of its use. [Figure 4] 11A to 11C are explanatory diagrams of a third embodiment of the thrust magnification device and an example of its use. [Diagram 5] 1 is an explanatory diagram of an embodiment of a thrust magnification device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (1) Overview of the embodiment The thrust magnification device 1 of this embodiment has an input function for inputting a thrust that is the source of the output thrust, and a thrust magnification function for magnifying the input thrust as a fluid pressure utilizing Pascal's principle and outputting it, and is formed by separating and independently forming a part that constitutes the thrust magnification function from a so-called air-hydro cylinder. The thrust magnification device 1 does not operate independently because it does not have an input within itself. It can be operated by assembling various input side actuators directly or via an adapter to obtain the thrust (input) to be magnified.

[0011] The device body 2 is formed with three through holes of different inner diameters in the axial direction (vertical direction in the drawing), the through holes consisting of a large diameter section that constitutes the cylinder section 21, a medium diameter section that constitutes the hydraulic chamber 6, and a small diameter section through which the output rod 5 is inserted. A piston 4 is disposed within the large diameter cylinder portion 21, and an output rod 5 is formed on the hydraulic chamber 6 side relative to the piston 4. As a result, the thrust input from the connected air cylinder 100 and magnified in the hydraulic chamber 6 acts in the direction of moving the piston 4 toward the lid portion 3, and the output rod 5 fixed to the piston 4 outputs the magnified thrust in the direction of being retracted inside the device main body 2.

[0012] (2) Details of the embodiment FIG. 1 shows the configuration of the thrust magnification device 1 in this embodiment, with (a) showing a cross section in the thrust direction (direction of the center line), (b) showing a side view from the left side, (c) showing a side view from the right side, (d) showing a cross section of the AA section in (a) seen in the direction of the arrow (from bottom to top in the figure), and (e) showing the bottom view. In FIG. 1, the area filled with oil, including the hydraulic chamber 6, is shown by being filled with solid color, and the area filled with air in the air chamber 7 is shown by being shaded downward to the left.

[0013] As shown in FIG. 1, the thrust magnification device 1 includes a device body 2 having a cylinder portion 21, a cover portion 3, a piston 4, and an output rod 5. The device body 2 and the lid portion 3 are formed from a metal such as aluminum, stainless steel, or iron. The outer shape of the device body 2 is a hexahedron, and the cross-sectional shape in a plane perpendicular to the axial direction is a substantially square shape as shown in Fig. 1(d). The lid part 3 is formed in the shape of a rectangular plate. The size of the device body 2 is, for example, about 70 mm on one side of the cross-sectional shape and about 5 mm in stroke length of the output rod 5, but it can be made larger or smaller.

[0014] Three through holes with different inner diameters are formed in the device body 2. The through holes are composed of a large diameter section, a medium diameter section, and a small diameter section, which are arranged in this order from the bottom to the top of the drawing. The large diameter portion is open at one end (lower surface) of the device body 2 to form a cylinder portion 21, inside which the piston 4 slides in the axial direction. The small diameter portion is open at the other end (upper surface) of the device body 2, and the output rod 5 is inserted into the inside of the small diameter portion. The medium diameter portion is continuous with the large diameter portion on one side and the small diameter portion on the other side, and forms a hydraulic chamber 6 which functions as a fluid pressure chamber filled with liquid. In the following explanation, the position or area of ​​the medium diameter part of the device main body 2 is referred to as the hydraulic chamber 6, but the parts that are actually filled with oil and contribute to increasing thrust are parts that are continuous with the hydraulic chamber 6, such as the input port 22 and oil supply hole 26 described below, and the large diameter part when the piston 4 moves.

[0015] The device body 2 is formed with an input port 22 that penetrates from one side surface to the hydraulic chamber 6 . As shown in FIG. 1(c), screw holes 25 are formed at two locations on the outside of the input port 22 for attaching an air cylinder 100 (input actuator) to be described later to the device body 2. An input rod 101 (see FIG. 2) of an air cylinder 100 attached to the device body 2 is inserted into the input port 22. An inner peripheral groove is formed around the entire inner peripheral surface of the input port 22, and an O-ring 23 is disposed in this inner peripheral groove. This O-ring 23 prevents oil in the hydraulic chamber 6 from leaking between the inner peripheral surface of the input port 22 and the outer peripheral surface of the input rod 101.

[0016] An oil supply hole 26 that penetrates to the hydraulic chamber 6 is formed on the surface of the device body 2 opposite to the surface on which the input port 22 is formed, and is adapted to be closed by an oil supply plug 27. In this embodiment, one set of oil supply hole 26 and oil supply plug 27 is provided, but another set may be provided on the same surface as the surface on which input port 22 is formed or on another surface. In this case, oil is supplied into hydraulic chamber 6 from one of them, and the other is used for bleeding air. Incidentally, a pressure sensor may be attached to the oil supply hole 26 so that the oil pressure in the oil pressure chamber 6 can be detected. 1, the area into which oil is filled from oil supply hole 26, including hydraulic chamber 6, is shown filled in. However, although input port 22 is entirely filled in, since input rod 101 is inserted from the open end side (side side) of device body 2, oil is actually present up to the hydraulic chamber 6 side beyond O-ring 23, specifically up to the tip face of input rod 101.

[0017] An inner circumferential groove is formed around the entire inner circumferential surface of the small diameter portion of the axial through hole in the device body 2, and an O-ring 28 is disposed in this inner circumferential groove to prevent oil in the hydraulic chamber 6 from leaking between the output rod 5.

[0018] In the end face of the device body 2 on the cylinder portion 21 side, four screw holes 29 for fixing the lid portion 3 are formed on the outside of the large diameter portion of the axial through hole.

[0019] 1(e), the cover 3 has four bolt holes 31 formed therein corresponding to the screw holes 29 of the device body 2. The cover 3 is fixed to the device body 2 with pressure bolts 32 passing through the bolt holes 31 and the screw holes 29. The cover 3 has two non-through pin holes formed on the surface facing the hydraulic chamber 6 when attached to the device body 2. One end of a rotation-stop pin 33 is press-fitted and fixed in the two pin holes, and the other end is slidably inserted into the guide hole 42 of the piston 4.

[0020] An air chamber 7 is formed by the inner peripheral surface of cylinder portion 21 , the end face of piston 4 on the side where guide hole 42 is formed, and the inner side surface of lid portion 3 facing piston 4 . The lid portion 3 has an L-shaped bent intake and exhaust hole 34 formed in a position that does not interfere with the anti-rotation pin 33. This intake and exhaust hole 34 extends axially from the surface on the air chamber 7 side facing the piston 4, then bends and extends radially, penetrating through to the outer circumferential surface of the lid portion 3. A silencer 35 is provided at the end of the intake and exhaust hole 34 to reduce the noise caused by the air exhausted from the intake and exhaust hole 34 . The internal volume of the air chamber 7 increases or decreases with the axial movement of the piston 4, and gas (air) is sucked in and exhausted through the intake and exhaust holes 34 and the silencer 35 in accordance with this increase or decrease in internal volume.

[0021] An output rod 5 is disposed on one surface of the piston 4. In this embodiment, the output rod 5 is formed integrally with the piston 4, but they may be formed separately and fixed together by a method such as press fitting or screw fastening. The piston 4 is disposed so as to be slidable in the axial direction within the large diameter portion of the cylinder portion 21. In this state, the output rod 5 passes through the hydraulic chamber 6 in the medium diameter portion and the small diameter portion, and its tip is exposed to the outside of the device body 2. Thus, in the thrust magnification device 1 of this embodiment, one surface of the piston 4 functions as a part of the partition wall of the hydraulic chamber 6, and the output rod 5 is disposed on the surface (one surface) of the piston 4 facing the hydraulic chamber 6. As a result, the fluid pressure (thrust) amplified by the input rod 101 entering the hydraulic chamber 6 acts on the piston 4 in the direction of the lid 3, and this amplified thrust can act on the output rod 5 connected to the piston 4 in the direction of the lid 3, i.e., in the direction of retracting it as viewed from the device body 2.

[0022] An outer circumferential groove is formed around the entire outer circumferential surface of the piston 4, and an O-ring 41 is disposed within this outer circumferential groove to prevent oil in the hydraulic chamber 6 from leaking between the inner circumferential surface of the cylinder portion 21 and the groove. 1 to 4, an attachment portion for attaching various tools is formed at the tip (open end) of the output rod 5. For example, a bolt hole for screwing a tool formed from the end face of the output rod 5 toward the piston 4 may be formed, or a female thread may be formed on the outer circumferential surface of the tip of the output rod 5, but is not limited thereto.

[0023] On the other surface of the piston 4, guide holes 42 that do not penetrate the piston 4 are formed at two positions corresponding to the anti-rotation pins 33. One end of the anti-rotation pin 33, the other end of which is press-fitted into the cover portion 3, is inserted into this guide hole 42. This prevents the piston 4 from rotating when it moves axially inside the cylinder portion 21.

[0024] Next, the use of the thrust magnification device 1 configured as above will be described. When using the thrust magnification device 1 of this embodiment, various input actuators are attached to the side surface of the device body 2 on which the input port 22 is formed. FIG. 2 shows an example of use in which an air cylinder 100 that functions as an input actuator is attached to the thrust magnification device 1. The first use example in Fig. 2(a) shows a state in which the air cylinder 100 is attached. Fig. 2(b) shows a right side view, Fig. 2(c) shows a top view, and Fig. 2(d) shows an operating state of the thrust magnification device 1 using the air cylinder 100. In addition, in FIGS. 2(a), (c), and (d), the thrust magnification device 1 is shown in cross section to explain the internal state, and in order to make it easier to understand the state of the oil-filled hydraulic chamber 6, the area filled with oil is shown by being filled in, and the area of ​​the air chamber 7 where air is present is shown by being lined down to the left. The thrust expansion device 1 in FIG. 2(c) shows a cross-sectional view of the AA section in FIG. 2(a) as viewed in the direction of the arrow (from bottom to top in the drawing).

[0025] 2(a), the air cylinder 100 has a cylindrical input rod 101 and intake and exhaust holes 102 and 103. The tip of the input rod 101 of the air cylinder 100 moves axially back and forth by the supply and exhaust of air through the intake and exhaust holes 102 and 103. As shown in FIG. 2(b), the air cylinder 100 has a main body portion having a rectangular outer shape, and has two through holes formed therein that pass through in the axial direction.

[0026] Although the internal state of the air cylinder 100 is not shown, a piston is disposed between the intake and exhaust holes 102 and 103, and an input rod 101 is connected to the surface of the piston on the intake and exhaust hole 103 side. For this reason, when the air cylinder 100 opens the intake and exhaust holes 103 and supplies air from the intake and exhaust holes 102, the piston is pushed by the air pressure and the input rod 101 is pushed out to the left side of Fig. 2(a). Conversely, when the intake and exhaust holes 102 are opened and air is supplied from the intake and exhaust holes 103, the piston 4 is pushed in the opposite direction and the pushed-out input rod 101 is returned inside the device.

[0027] When attaching the air cylinder 100, the tip of the input rod 101 is inserted into the input port 22 of the thrust magnification device 1 up to a position inside the O-ring 23. In this state, the two pressing bolts 109 passed through the through holes of the air cylinder 100 are screwed into the screw holes 25 of the device body 2 to fix the air cylinder 100 to the thrust magnification device 1 . After the air cylinder 100 is attached, the oil supply plug 27 of the device body 2 is removed, and oil is supplied from the oil supply hole 26 . It is also possible to fill hydraulic chamber 6 with a certain amount of oil before attaching air cylinder 100, and then, after attaching air cylinder 100, remove oil filler plug 27 and supply the shortage of oil through oil filler hole . After the air cylinder 100 is attached, the hydraulic chamber 6 is filled with sufficient oil, and the oil supply hole 26 is closed with the oil supply plug 27, so that the hydraulic chamber 6 has a sealed structure that prevents the inflow and outflow of external fluid. In the thrust magnification device 1 of this embodiment, the fluid used to obtain the amplified fluid pressure (thrust) is an oil such as hydraulic oil, which is an easily available incompressible fluid. However, the fluid used may be a gas, liquid, or gel-like substance having fluidity. In this case, the hydraulic chamber 6 is filled with the appropriate fluid.

[0028] Next, an operation of the thrust magnification device 1 equipped with the air cylinder 100 will be described. 2(a) and 2(c) is the initial state of the thrust magnification device 1 in which the thrust is not magnified. That is, in the initial state, the tip of the input rod 101 of the air cylinder 100 is not pushed out. In addition, in the initial state of the thrust magnification device 1, the end face of the piston 4 on the hydraulic chamber 6 side is in contact with a step (a step facing the lid 3) formed by a large diameter part and a medium diameter part of a through hole that penetrates the device body 2 in the axial direction. In this state, the piston 4 is furthest from the lid 3, and the tip of the output rod 5 connected to the piston 4 is furthest from the device body 2 to the outside. In the initial state, the tip of the output rod 5 is assumed to protrude from the device body 2 by a distance L0.

[0029] When using the thrust magnification device 1 equipped with the air cylinder 100, in the initial state shown in FIG. 2(a), the intake and exhaust holes 34 of the thrust magnification device 1 and the intake and exhaust holes 103 of the air cylinder 100 are opened to allow the air inside to escape. 2(d), by supplying air from the intake / exhaust hole 102, a piston (not shown) in the air cylinder 100 is pushed toward the thrust magnification device 1, and air is released from the intake / exhaust hole 103. As the piston moves, the input rod 101 is pushed out and enters the hydraulic chamber 6. This movement of the input rod 101 causes the piston 4 and the output rod 5 to move by the hydraulic stroke OS (=L0-L1) to the opposite side (the lid 3 side) of the hydraulic chamber 6. The movement of the piston 4 reduces the volume of the air chamber 7 by the amount of the movement, and the air inside is released through the intake and exhaust holes 34.

[0030] Then, from the tip of the output rod 5, a pulling force is generated at a thrust Fp1 amplified (enlarged) by hydraulic pressure with respect to the thrust of the air cylinder 100, that is, the thrust Fi from the tip of the input rod 101.

[0031] Here, if the area of the tip surface of the input rod 101 is S1 and the area of the piston 4 (the area obtained by subtracting the radial cross-sectional area of the output rod 5 from the radial cross-sectional area of the piston 4) is S2, the force received by the piston 4 from the oil in the hydraulic chamber 6, that is, the pulling thrust Fp output from the tip of the output rod 5 is as shown in the following formula (1). Formula (1) Fp1 = (Fi / S1) × S2 = Fi × (S2 / S1) According to the thrust amplification device 1 of the present embodiment, since S1 < S2, a pulling force with an amplified thrust Fp with respect to the thrust Fi from the input rod 101 can be output from the output rod 5.

[0032] When returning from the state shown in Fig. 2(d), in which the thrust (pulling force) amplified by the thrust amplification device 1 is output, to the initial state shown in Fig. 2(a), it is as follows. That is, by setting the intake and exhaust hole 102 to the open state and supplying air from the intake and exhaust hole 103, the input rod 101 of the air cylinder 100 is retracted from the hydraulic chamber 6. As a result, the volume of the space where the input rod 101 was located in the hydraulic chamber 6 is restored, a negative pressure is applied to the piston 4 on the side of the hydraulic chamber 6, and an atmospheric pressure is applied to the air chamber 7, so the piston 4 moves until it abuts against the step portion.

[0033] Here, when returning to the initial state more reliably, air may be supplied from the intake and exhaust hole 103, and air may also be supplied from the intake and exhaust hole 34 of the thrust amplification device 1, which was in the open state, to the air chamber 7. The piston 4 can be prevented from rotating by the anti-rotation pin 33 with respect to the axial movement in the cylinder portion 21.

[0034] Next, a second embodiment of the thrust amplification device 1 will be described. In the thrust magnification device 1 described in the first embodiment, the input port 22 is formed at a position where the central axis of the input port 22 passes through the central axis of the output rod 5. Then, as shown in Fig. 2(d) , the input port 22 is formed so that the tip of the input rod 101 does not come into contact with the output rod 5 when the input rod 101 of the connected air cylinder 100 is in a pushed-out state, or the amount of push-out of the input rod 101 is adjusted. In contrast, in the thrust magnification device 1 of the second embodiment, the input port 221 corresponding to the input port 22 of the first embodiment is shifted to a position where the extension line of its inner surface does not interfere with the outer surface of the output rod 5, and is formed so that a part or all of its radial cross section passes through the hydraulic chamber 6.

[0035] In the thrust magnification device 1 of the second embodiment, the extension of the inner circumferential surface of the input port 221 does not interfere with the output rod 5, so the terminal position of the input port 221 can be set to any position. By increasing the distance to the terminal position of the input port 221, the amount of penetration of the input rod 111 into the input port 221 can be increased, and the operating range of the output rod 5 can be increased. For example, like the first embodiment, the inside of the hydraulic chamber 6 can be set as the terminal position. Also, the input port 221 can be formed by extending it to the device body 2 on the opposite side of the hydraulic chamber 6.

[0036] The input port 221 may be formed partway through the device body 2 so that the extended tip end has a bottom. Furthermore, the input port 221 may be formed so as to penetrate the device body 2. When the input port 221 is formed so as to penetrate the device body 2, a sealing cover 8 (sealing means) for sealing the hydraulic chamber 6 is provided.

[0037] FIG. 3 is an explanatory diagram of a second embodiment of the thrust magnification device 1 and an example of its use. Fig. 3(a) shows the state in which the air cylinder 110 is attached to the thrust magnification device 1, (b) shows the left side view, Fig. 3(c) shows the cross section of the thrust magnification device 1 as seen in the direction of the arrow (from bottom to top in the figure) in Fig. 3(a), and Fig. 3(d) shows the operating state of the thrust magnification device 1 with the air cylinder 110. 3(a), (c), and (d), like FIG. 2, the thrust magnification device 1 is shown in cross section to explain the internal state, and the area filled with oil is shown by being filled in solid to make it easier to understand the state of the oil-filled hydraulic chamber 6, and the area of ​​the air chamber 7 where air is present is shown by being lined down to the left. In the following embodiments, the same parts as or corresponding parts to the first embodiment are denoted by the same reference numerals, and their description will be omitted or only differences will be described.

[0038] The thrust magnification device 1 of the second embodiment shown in FIG. 3 is an example in which the above-mentioned input port 221 penetrates the device body 2 and a sealing lid 8 is provided. The thrust magnification device 1 is formed with an input port 221 through which the input rod 111 of the air cylinder 110 attached to the device body 2 is inserted. As shown in Figures 3(a) and (d), the central part in the longitudinal direction of this input port 221 overlaps with the hydraulic chamber 6 and passes through the entire device body 2.

[0039] On one of the two opposing faces of the device body 2 (the right face in FIG. 3(a)), screw holes 25 for attaching the air cylinder 110 are formed in two diagonal positions outside the input port 221. A recess is formed on the side of the screw hole 25 in the device body 2, with an inner diameter larger than the inner diameter of the input port 221. An adapter 225 is disposed in this recess, the adapter having an outer diameter substantially the same as that of the recess and an inner diameter substantially the same as the outer diameter of the input rod 111 inserted into the input port 221. This adapter 225 is prepared with adapters of various inner diameters, and an appropriate one is selected according to the outer diameter of the input rod 111 in the air cylinder 110 to be connected.

[0040] An inner peripheral groove is formed around the entire inner peripheral surface of adapter 225, and O-ring 231 is disposed in the inner peripheral groove. Also, an outer peripheral groove is formed around the entire outer peripheral surface of adapter 225, and O-ring 232 is disposed in the outer peripheral groove. Both O-rings 231 and 232 prevent oil leakage from the hydraulic chamber 6. In addition, when the outer diameter of the input rod 111 of the connected air cylinders 110 is uniform or when only one type of air cylinder 110 is used, the adapter 225 is not used and an O-ring 23 may be provided on the inner surface of the input port 221, as in the first embodiment.

[0041] Four screw holes 251 are formed on the surface (the surface on the left side in FIG. 3(a)) opposite to the surface on which the screw holes 25 are formed in the device body 2. Using these four screw holes 251, the sealing lid 8 is fixed to the device body 2 with four pressing bolts 81, as shown in FIGS. 3(a) and (b). The sealing cover 8 is used to seal an input port 221 that communicates with the hydraulic chamber 6 and passes through the device body 2 .

[0042] In the central portion of the sealing lid 8 of this embodiment, a protrusion 83 having an outer diameter larger than the inner diameter of the input port 221 and protruding toward the device body 2 side, and a protrusion 82 protruding to the opposite side are formed. In the center of the sealing lid 8, an extended recess 84 (a recess with a bottom) having the same inner diameter as the inner diameter of the input port 221 is formed from the protrusion 83 side toward the protrusion 82 side. This allows the input rod 111 of the air cylinder 110 to pass through the input port 221 and further into the extended recess 84.

[0043] An outer circumferential groove is formed around the entire outer circumferential surface of the protrusion 83, and an O-ring 89 is disposed within this outer circumferential groove. A recess having an inner diameter larger than the inner diameter of the input port 221 is formed at the opening (end) of the input port 221 that penetrates the device body 2, and the protrusion 83 is inserted into the recess, and the sealing cover 8 is fixed to the device body 2 with a pressure bolt 81. When the sealing lid 8 is attached, the O-ring 89 on the protrusion 83 prevents oil leakage from within the hydraulic chamber 6.

[0044] In the thrust magnification device 1 of this embodiment, of the four faces surrounding the axial direction of the device main body 2, two opposing faces are penetrated by an input port 221, and one of the faces is used to fix the air cylinder 110 and the other face is used to fix the sealing lid 8. Therefore, in the second embodiment, as shown in FIG. 3(c), the fuel filler hole 26 and the fuel filler plug 27 are arranged on one of the remaining two faces (the side on which the inlet port 221 is not formed). The fuel filler hole 26 and the fuel filler plug 27 may be formed on the side where the input port 221 is formed, but in this case the fuel filler hole 26 will penetrate from the end face on that side to the input port 221.

[0045] In the thrust magnification device 1 of this embodiment, in order to accommodate a hydraulic stroke of the piston 4 and the output rod 5 that is larger than those of the first embodiment, the longitudinal lengths of the device body 2 and the cylinder portion 21 are made longer than those of the first embodiment. To accommodate this large hydraulic stroke, the guide hole 42 is formed deeper and the anti-rotation pin 33 is formed longer than in the first embodiment.

[0046] In this embodiment, a non-through pin hole is formed in the center of the cover portion 3, and one end of a guide pin 36 is fixed by press-fitting into this pin hole. Meanwhile, a bottomed hole 44 is formed in the center of the piston 4, the inside diameter of which is larger than the outside diameter of the guide pin 36 and the depth of which extends to the output rod 5. Into this hole 44, the other end of the guide pin 36 is inserted. A coil spring 37 is disposed between the outer peripheral surface of the guide pin 36 and the inner peripheral surface of the hole 44. One end of the coil spring 37 abuts against the lid 3, and the other end abuts against the bottom surface of the hole 44, thereby biasing the lid 3 and the piston 4 in the direction of separating them. The biasing force of this coil spring 37 enables the piston 4 and the output rod 5 to quickly return from the driven state to the initial state.

[0047] Next, the operation of the thrust magnification device 1 of this embodiment using the air cylinder 110 will be described with reference to FIGS. As shown in FIG. 3(a), the initial state of the thrust magnification device 1 is a state in which the thrust is not magnified and the piston 4 is furthest from the lid portion 3, similarly to the first embodiment. 3(d), by supplying air from the intake / exhaust hole 112, a piston (not shown) in the air cylinder 110 is pushed toward the thrust magnification device 1, and air is released from the intake / exhaust hole 113. As the piston moves, the input rod 111 is pushed out, passes through the hydraulic chamber 6, and enters the extension recess 84 of the sealing cover 8. This movement of the input rod 111 causes the piston 4 and the output rod 5 to move toward the lid portion 3, as in the first embodiment, and the movement of the piston 4 causes the air in the air chamber 7 to escape through the intake and exhaust holes .

[0048] A retracting force is generated from the tip of the output rod 5 by a thrust of the air cylinder 110, that is, a thrust amplified (magnified) by hydraulic pressure in response to the thrust from the tip of the input rod 111. As described above, in the thrust magnification device 1 of the second embodiment, the volume of the input rod 111 that enters the hydraulic chamber 6 is larger than that of the first embodiment, and accordingly, the hydraulic stroke (retraction distance) of the output rod 5 is also larger.

[0049] On the other hand, when returning to the initial state shown in FIG. 3(a) from the state shown in FIG. 3(d) in which the thrust magnification device 1 is outputting an magnified thrust (retraction force), the intake and exhaust hole 112 is opened and air is supplied from the intake and exhaust hole 113, as in the first embodiment, to retract the input rod 111 from the hydraulic chamber 6. At this time, in the second embodiment, since the output rod 5 is biased by the coil spring 37 in a direction away from the cover portion 3, it can be returned to the initial state more smoothly. The guide pin 36, the coil spring 37, and the hole 44 may also be provided in the thrust magnification device 1 of the first embodiment. Also in the second embodiment, as described as a modified example of the first embodiment, air may be supplied from the intake / exhaust hole 113 and air may be supplied to the air chamber 7 from the intake / exhaust hole 34 of the thrust magnification device 1 that was in an open state. This allows the thrust magnification device 1 to return to the initial state even more smoothly.

[0050] As described above, according to the thrust magnification device 1 of the second embodiment, a long input stroke (input volume) for the input rod 111 can be ensured, and therefore the hydraulic stroke (retraction stroke) of the piston 4 and the output rod 5 can be made long.

[0051] The above describes the second embodiment of the thrust magnification device 1, in which an input port 221 is formed that is connected to the hydraulic chamber 6 and penetrates the device body 2, and an air cylinder 110 is attached to one side of the two opening surfaces (the right side in Figure 3(a)), and a sealing lid 8 is attached to the other side (the left side in the same figure). In the second embodiment, the air cylinder 110 and the sealing lid 8 may be arranged on either side of the opening faces of the input port 221 . That is, recesses of the same position, shape and size are formed on both sides of the input port 221 penetrating the device body 2, and the outer diameter shape of the protrusion 83 of the sealing lid 8 is made the same as that of the adapter 225. Note that the inner diameter of the adapter 225 is formed to a size that allows the outer diameter of the input rod 111 to enter and exit, as in the second embodiment.

[0052] In addition, in the second embodiment, the screw holes 25 for fixing the air cylinder 110 are formed at two diagonal locations, but in this modified example, in addition to the two screw holes 25 described above, screw holes 25 are formed at two other diagonal locations, for a total of four locations. Then, a screw hole 251 for fixing the sealing lid 8 is formed at the same position as the screw hole 25. In this way, by forming four screw holes 25 (screw holes 251), it becomes possible to attach the air cylinder 110 to the thrust magnification device 1 with the intake / exhaust holes 112 and the intake / exhaust holes 113 facing in any direction, up, down, left, or right.

[0053] Moreover, the sealing lid 8 of the second embodiment is provided with the protrusion 82, and the extended recess 84 is formed inside the protrusion 82. As another modification to this, the convex portion 83 may be formed only on one side of the sealing lid 8, and the opposite side may be formed flat without the convex portion 82. In this case as well, the thickness of the sealing lid 8 is set to a thickness that is equal to the thickness of the convex portion 82, and a bottomed extended recess 84 is formed in the center with the convex portion 83 side as the opening side. In other words, the thickness of the sealing lid 8 is set to a sufficient thickness to enable the bottomed extended recess 84 to be formed.

[0054] Also, the sealing lid 8 may be formed in a flat plate shape with no protrusions on either side. In this case, a circular groove surrounding the outside of the input port 221 is formed in either one of the opposing end faces of the sealing cover 8 and the device main body 2, and an O-ring is placed in the groove to prevent oil leakage from the input port 221 into the hydraulic chamber 6.

[0055] Next, a third embodiment will be described. In the first and second embodiments described above, the input port and input fixing means (screw hole 25) for connecting an input actuator (air cylinder 100, etc.) to the thrust magnification device 1 are formed in one location (one of the four sides of the device main body 2). In contrast, in the thrust magnification device 1 of the third embodiment, the input ports and input fixing means are formed on a plurality of side surfaces, making it possible to attach a plurality of input actuators (such as the air cylinder 100). In this third embodiment, the positions of each mounting surface are adjusted so that the input rods do not interfere with (contact with) each other when the multiple installed input cylinders are operated simultaneously (when the input rods are inserted into the hydraulic chamber 6).

[0056] Fig. 4 is an explanatory diagram of a third embodiment of the thrust magnification device and an example of its use. Fig. 4(a) is a cross-sectional view of the device body 2 of the third embodiment corresponding to Fig. 2(a), in which the AA (not shown) cross section is viewed from below, (b) shows a side view from the left, and (c) shows a side view from below. Note that Fig. 4(a) shows a cross section of only the thrust magnification device 1, as in Figs. 2 and 3, and the area filled with oil is shown by filling it in.

[0057] 4, in the thrust magnification device 1 of this embodiment, screw holes 25 serving as input fixing means are provided on three of the four faces of the device body 2 surrounding the output rod 5. The screw holes 25 on each face are formed in four places, not two places on a diagonal line, and when fixing the air cylinder 100, the two screw holes 25 on the diagonal line corresponding to the mounting orientation of the air cylinder 100 are used. On the other hand, a lid 9 for sealing the input port 22 is fixed with a holding bolt 91 using four screw holes 25 on the surface on which the air cylinder 100 is not attached.

[0058] In this way, a common input fixing means (screw holes 25) is arranged on three of the four sides of the device body 2, so the orientation and number of air cylinders 100 can be selected according to the installation environment and purpose of the thrust magnification device 1. Here, the input actuators attached to the thrust magnification unit 1 may be pneumatic or electric, or a combination of pneumatic and electric actuators may be used. The output rod 5 may be coarsely moved by the pneumatic actuator and finely moved (fine-tuned) by the electric actuator.

[0059] As shown in FIG. 4, the thrust magnification device 1 of this embodiment has input ports 22a to 22c penetrating the hydraulic chamber 6 from three directions, and screw holes 25a, 25b, and 25c are formed at four locations around each port. In the example of use shown in FIG. 4, an air cylinder 100a having intake and exhaust holes 102a and 103a is fixed to two screw holes 25a with retaining bolts 109a, and an air cylinder 100b having intake and exhaust holes 102b and 103b is fixed to two screw holes 25b with retaining bolts 109b. A cover 9 for sealing unused input ports 22c is fixed to four screw holes 25c with press bolts 91. When the air cylinder 100a shown in FIG. 4 is not used (when only the air cylinder 100b is used), the unused input port 22a and input port 22c are sealed with the lids 9, 9, respectively.

[0060] A temporary rod 92 (convex portion) having the same diameter as the input rod 101 is formed in the center of the lid 9. The temporary rod 92 is formed to have the same length as the input rod 101 in the initial state, and the temporary rod 92 and the O-ring 23 prevent oil leakage from within the hydraulic chamber 6. The sealing lid 8 may be formed in a flat plate shape without providing the temporary rod 92. In this case, the sealing lids 8a to 8c have circular grooves formed on the end faces facing the device body 2, facing the outside of the input ports 22a to 22c, and an O-ring is provided in the groove. This prevents oil from leaking from the input ports 22a to 22c fixed by the sealing lids 8a to 8c in the hydraulic chamber 6. The circular groove and the O-ring may be provided on the device body 2 side.

[0061] As shown in FIG. 4(a), in the thrust magnification device 1 of this embodiment, the oil filler hole 26 and the oil filler plug 27 are disposed on a surface of the device body 2 on which the input ports 22a to 22c are not formed.

[0062] As a modification of this embodiment, input ports 22a-22d may be formed penetrating the hydraulic chamber 6 from all four directions, and screw holes 25a-25d may be formed at four locations around each port, so that four air cylinders 100a-100d can be connected. In this modified example, the oil fill hole 26 and the oil fill plug 27 are formed in a position above the input ports 22a-22d or above the hydraulic chamber 6, in a position that does not interfere with the opening on the surface in which the opening through which the output rod 5 enters and exits is formed.

[0063] Although not shown, the thrust magnification device 1 of the third embodiment may also be provided with anti-rotation means (guide hole 42 and anti-rotation pin) for the output rod 5 and the piston 4, similar to the first embodiment. Furthermore, similarly to the second embodiment, a biasing means (a pin hole in the lid portion 3, a guide pin 36, a coil spring 37) for biasing the lid portion 3 and the piston 4 in a direction away from each other may be provided.

[0064] The operation of the thrust magnification device 1 in the third embodiment is as follows. In other words, when the air cylinder 100 is connected to only one location of the thrust magnification device 1 of the third embodiment and the remaining two locations are sealed with the lid 9, the operation is the same as that of the thrust magnification device 1 of the first embodiment, and the hydraulic stroke of the output rod 5 is also the same.

[0065] On the other hand, when two or three air cylinders 100 are connected, or in the modified example, four air cylinders 100 are connected, there is a first driving method in which the air cylinders 100 are driven one by one in sequence, and a second driving method in which all the air cylinders are driven simultaneously. In either the first driving method or the second driving method, the hydraulic stroke of the output rod 5 when the driving of all the air cylinders 100 is completed is the same. In both driving methods, the pressing pressure applied to the hydraulic chamber 6 by the input rod 101 of each air cylinder 100 is the same.

[0066] In the first driving method, by driving the air cylinders 100 in sequence, the hydraulic stroke amount of the output rod 5 can be stopped at the position of each stage at which each air cylinder 100 is operated. That is, when three air cylinders 100 are driven in sequence, the hydraulic stroke amount can be stopped at three stages. In this case, some of the multiple air cylinders 100 can be used for coarse movement, and the rest can be used for fine movement (precise movement). On the other hand, in the case of the second driving method, all the air cylinders 100 are driven simultaneously, so that the output rod 5 can be moved to the maximum hydraulic stroke in the shortest time. In the first and second driving methods, instead of ultimately driving all of the air cylinders 100, it is also possible to drive only a portion of the connected air cylinders 100 depending on the usage status of the thrust magnification device 1.

[0067] When the driven thrust magnification device 1 is returned to its initial state, the operation of each air cylinder 100 is basically the same as in the first embodiment. When returning to the initial state, the driving method may be either the first or second driving method, and each air cylinder 100 may be returned in sequence or simultaneously.

[0068] Next, an embodiment (example of use) of the thrust magnification device 1 will be described. FIG. 5 is an explanatory diagram of an embodiment of the thrust magnification device 1 in which a diaphragm-type chuck device is attached to the tip of an output rod 5. In FIG. Fig. 5(a) shows a state in which the chuck device 700 and the air cylinder 100 are attached to the thrust magnification device 1, and similarly to Fig. 2(a), the parts other than the air cylinder 100 are shown in cross section. In the cross-sectional view of Fig. 5(a), the cross section of the diaphragm portion 720 is shaded diagonally downward to the right. Moreover, FIG. 5(b) shows the chuck device 700 attached to the thrust magnification device 1 as viewed from above, and FIG. 5(a) shows a cross section of the thrust magnification device 1 as viewed in the direction of the arrow at the CC cross section in FIG. 5(b).

[0069] The thrust magnification device 1 shown in Figure 5 differs from the thrust magnification device 1 of the first embodiment in that it has a retraction recess 24 and three screw holes (for bolts 722), but is otherwise formed in the same manner. That is, a retracting recess 24 is formed at the end of the device body 2 on the side where the output rod 5 enters and exits, and screw holes (three locations) for the bolts 722 are formed on the outside of the retracting recess 24. The retracting recess 24 is formed so that its inner diameter is larger than the chuck portion 710 of the chuck device 700 and smaller than the outer diameter of the diaphragm portion 720.

[0070] Although not shown or described in the first embodiment, a male thread for screwing a tool is formed on the outer circumferential surface of the tip end of the output rod 5 in this embodiment.

[0071] The chuck device 700 attached to the thrust magnification device 1 includes a chuck portion 710 for clamping a workpiece, a jig, etc., a diaphragm portion 720, and a retractable adapter 730. The chuck portion 710 includes three sets of members, each consisting of a fan-shaped base portion 711 obtained by dividing a circle into three, a claw portion 712 erected at the center of each base portion 711, and a screw hole and a bolt 713 for fixing each base portion 711 to the diaphragm portion 720. The three claw portions 712 are shaped like a cylindrical member divided vertically into three, similar to the base portion 711. The three fan-shaped base portions 711 are connected on their bottom surfaces by a ring-shaped member 714.

[0072] The diaphragm portion 720 has a thin diaphragm having a through hole 721 formed in the center and capable of elastic deformation in the thickness direction, and a thick portion formed on the outer periphery of the diaphragm. The thick portion has a bolt hole for fixing the chuck portion 710 with a bolt 713 and a bolt hole for fixing the diaphragm portion 720 to the device body 2 with a bolt 722.

[0073] The retraction adapter 730 has a through hole formed in the center penetrating in the longitudinal direction, and a female thread that screws together with the male thread at the tip of the output rod 5 is formed on the inside of the through hole. A flange portion 731 is formed at approximately the center in the longitudinal direction of the retractable adapter 730. The outer diameter of this flange portion 731 is formed to be larger than the inner diameter of the through hole 721 formed at the center of the diaphragm portion 720.

[0074] Next, a method for attaching the chuck device 700 will be described. When the thrust magnification device 1 is in a non-operating state (initial state), the chuck device 700 has the claws 712 of the chuck portion 710 in an open state, as shown in FIG. 2(d), air is supplied from the intake and exhaust hole 102 of the air cylinder 100 with the intake and exhaust hole 103 open. Then, the input rod 101 of the air cylinder 100 enters the hydraulic chamber 6, and the flange portion 731 of the retraction adapter 730 attached to the tip of the output rod 5 is retracted toward the lid portion 3 together with the piston 4 by the thrust expanded in the hydraulic chamber 6. As a result, the center portion of the diaphragm portion 720 is retracted toward the lid portion 3, elastically deforming, and the claw portion 712 of the chuck portion 710, which was in an open state, closes. With the claws 712 in a closed state, the three claws 712 are inserted into holes for clamping a workpiece, etc. After insertion, when the intake / exhaust hole 102 of the air cylinder 100 of the thrust magnifying device 1 is opened and air is supplied from the intake / exhaust hole 103 to return the input rod 101 to its original position, the piston 4 returns to its original position, and the restoring force of the elastically deformed diaphragm portion 720 causes the claws 712 to try to open to their original position. At this time, if the inner diameter of the workpiece or the like clamped by the claw portion 712 is smaller than the outer diameter when the claw portion 712 is open (the state in FIG. 5), the clamping inner circumferential surface of the workpiece or the like comes into contact with the outer circumferential portion of the claw portion 712 before the claw portion 712 is fully opened. At the time of contact, the amount of elastic deformation of the diaphragm portion 720 generated by the retraction of the output rod 5 has not yet returned to its original state, so a force attempting to return to its original state remains, and the claw portion 712 grips the workpiece or the like with this force.

[0075] Next, the operation of the chucking device 700 will be described. When the thrust magnification device 1 is in a non-operating state (initial state), the chuck device 700 has the claws 712 of the chuck portion 710 in an open state, as shown in FIG. In this open state, a workpiece or the like is inserted between the three claws 712, and then the thrust magnification device 1 is driven by the air cylinder 100. That is, in the same manner as in the operation described with reference to FIG. 2(d), air is supplied from the intake / exhaust hole 102 of the air cylinder 100 with the intake / exhaust hole 103 open. Then, when the input rod 101 of the air cylinder 100 enters the hydraulic chamber 6, the thrust generated in the hydraulic chamber 6 causes the flange portion 731 of the retraction adapter 730 attached to the tip of the output rod 5 to be retracted toward the lid portion 3 together with the piston 4. As a result, the central portion of the diaphragm portion 720 is drawn toward the lid portion 3, causing the claw portions 712 of the chuck portion 710, which were in an open state, to close and clamp the workpiece or the like.

[0076] When the chuck portion 710 that is clamping the workpiece or the like is to be released, the thrust magnification device 1 is returned to the initial state in the same manner as described with reference to FIG.

[0077] In the above-described embodiments and examples, the air cylinders 100, 110 are attached to the thrust magnification device 1. However, air cylinders of different sizes or electric cylinders may be attached as other input actuators. For example, in the case of an electric cylinder, when there is no through hole for a clamp bolt for mounting to the device body 2, the cylinder is fixed to the device body 2 via a specified adapter. When fixing the adapter to the device body 2, it is possible to use the screw holes 25 of the device body 2. If the screw holes 25 cannot be used, the cover 3 may be provided with screw holes for fixing the adapter.

[0078] As described above, the thrust magnification device 1 in each of the embodiments and modified examples (hereinafter referred to as each embodiment, etc.) has an input function for inputting a thrust that is the source of the output thrust, and a thrust magnification function for magnifying the input thrust as a fluid pressure utilizing Pascal's principle and outputting it. The part that constitutes the thrust magnification function is separated from a so-called air-hydro cylinder and formed independently as the thrust magnification device 1. Since the thrust magnification device 1 cannot operate independently due to the separated input function, it can be operated by attaching various input side actuators (air cylinder 100, etc.) for obtaining the thrust (input) to be magnified directly or via an adapter to the mounting means (screw holes 25) of the device main body 2. In this way, according to the thrust magnification device 1 of each of the embodiments and the like, various input-side actuators can be easily fixed and replaced.

[0079] In the thrust magnification device 1, a piston 4 is disposed in a cylinder portion 21 of a device body 2, and an output rod 5 passing through a hydraulic chamber 5 is disposed on the same surface of the piston 4 as a hydraulic chamber 6 where the magnified thrust acts. As a result, the thrust input from the connected air cylinder 100 and magnified in the hydraulic chamber 6 is output in a direction in which the tip (open end) side of the output rod 5 is pulled inward of the thrust magnification device 1. That is, by arranging the output rod 5 on the same side as the hydraulic chamber 6 with respect to the piston 4 on which the hydraulic chamber 6 acts, it is possible to apply an enlarging thrust force to the output rod 5 in the retracting direction. [Explanation of symbols]

[0080] 1 Thrust expansion device 2 Device body 3 Lid 4 Piston 5 Output rod 6 Hydraulic chamber 7 Air chamber 8, 8a-8c Sealing lid 9 Lid 21 Cylinder section 22, 22a~22c inlet 23 O-ring 24 Retractable recess 25 Screw hole 26 Fuel filler hole 27 Fuel filler plug 28 O-ring 29 Screw hole 31 Bolt hole 32 Press bolt 33 Anti-rotation pin 34 Intake and exhaust hole 35 Silencer 36 Guide pin 37 Coil spring 41 O-ring 42 Guide hole 44 Hole 81 Holding bolt 82 Convex part 83 Convex portion 84 Extended concave portion 89 O-ring 91 Retaining bolt 92 Temporary Rod 100, 100a to 100c Air cylinder 101 Input rod 102, 103 Intake and exhaust holes 109 Press bolt 110 Air cylinder 111 Input rod 112, 113 Intake and exhaust holes 225 Adapter 231, 232 O-ring 251 Screw hole 700 Chuck device 710 Chuck part 711 Base 712 Claw 713 Bolt 714 Ring-shaped member 720 Diaphragm part 721 Through hole 722 Volt 730 Retract Adapter 731 Flange part

Claims

1. 1. A thrust magnifying device that amplifies and outputs a thrust input from an input actuator by connecting the input actuator, A device body having a cylinder; a piston disposed within the cylinder and movable in an axial direction of the cylinder; an output rod disposed on one surface of the piston; a fluid pressure chamber, the fluid pressure chamber being filled with liquid, the fluid pressure chamber including an inner circumferential surface of the cylinder and the one surface of the piston as part of a partition wall; an input port that penetrates from a side surface of the device body to the fluid pressure chamber and through which an input rod of the input actuator is inserted; an input fixing means for fixing the input actuator, the input rod of which is inserted into the input port, to the device body; The input port is disposed such that an input rod of an input actuator fixed to an input fixing means is shifted to a position where it does not interfere with the output rod. A thrust magnification device comprising:

2. When viewed from a direction perpendicular to a direction in which an input actuator is inserted from the input port and a length direction of the output rod, the fluid pressure chamber is penetrated from the device body in a direction intersecting the output rod.

2. The thrust magnification system of claim 1 .

3. The input fixing means is formed on a side surface of the device body extending in the axial direction.

3. The thrust magnification device according to claim 1 or 2.

4. The outer peripheral surface of the device body has a flat surface extending in the axial direction, the input fixing means has a screw hole formed on the plane for fixing the input actuator; 4. The thrust magnification device according to claim 1, 2 or 3.

5. A plurality of the input ports and the input fixing means are formed.

5. The thrust magnification device according to claim 1, wherein the thrust magnification device further comprises a thrust magnification mechanism.

6. a sealing cover for sealing the input port in which no input actuator is disposed; a lid fixing means for fixing the sealing lid to the device body; 6. The thrust magnification system according to claim 5, further comprising:

7. The input fixing means also serves as the lid fixing means.

7. The thrust magnification system of claim 6.

8. The input port is formed beyond the fluid pressure chamber when viewed from the input fixing means side. The thrust magnification device according to any one of claims 1 to 7.

9. The input port is a bottomed recess formed in the device body up to a position just short of a side surface opposite the input fixing means.

9. The thrust magnification system of claim 8.

10. The input port penetrates the entire device body, a sealing means for sealing the input port, which penetrates the entire device body, on the opposite side to the input fixing means; 9. The thrust magnification system of claim 8, further comprising:

11. The sealing means has an extended recess that is continuous with the input port and through which the input rod is inserted. The thrust augmentation system of claim 10.

Images