Air cylinder for pneumatic hydraulic station and pneumatic hydraulic station

Abstract

The utility model provides an air cylinder for a pneumatic hydraulic station and the pneumatic hydraulic station. Air cylinder end covers at the two ends of the air cylinder are both provided with auxiliary exhaust valves which are used for being opened when air enters the other air cylinder cavity so as to release the air pressure in the air cylinder cavity corresponding to the auxiliary exhaust valves, and therefore the air cylinder piston can move towards the air cylinder end covers on the side of the air cylinder cavity under the action of the air pressure in the other air cylinder cavity, and the reversing triggering device is triggered. When air enters the other air cylinder cavity, the auxiliary exhaust valve is opened, the air pressure of the air cylinder cavity corresponding to the auxiliary exhaust valve is removed, and then the air cylinder piston can move towards the air cylinder end cover on the side of the air cylinder cavity under the action of the air pressure in the other air cylinder cavity, so that the reversing trigger device is triggered; and the reversing valve is controlled to reverse until the corresponding exhaust port and the corresponding air inlet are communicated, so that the phenomena that a workpiece is not tightly clamped, a cutter is collided and the like due to clamping stop of the air cylinder and loss of pressure of a tool are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic station, specifically, a cylinder for pneumatic hydraulic station and pneumatic hydraulic station. BACKGROUND

[0002] The hydraulic station is a hydraulic device for supplying oil according to the required flow direction, pressure and flow rate, and is usually used in combination with a machine tool requiring a hydraulic drive actuator.

[0003] Referring to Figure 1 , which is a structural schematic view of the hydraulic station provided in the prior art. As shown in the figure, the hydraulic station comprises: a linkage cylinder 1', an oil cylinder 2'; wherein the two sides of the cylinder end cover of the cylinder 1' are respectively provided with a first air control valve 3' and a second air control valve 4', and at the same time, the cylinder 1' is communicated with an air control reversing valve 5', and the air source is connected with the air inlet of the first air control valve 3', the second air control valve 4' and the air control reversing valve 5' respectively; the A' working port of the air control reversing valve 5' is communicated with one side of the cylinder 1', and the B' working port of the air control reversing valve 5' is communicated with the other side of the cylinder 1'; the first air control valve 3' and the air control reversing valve 5' are connected to control the air control reversing valve 5' to start the A' working port of the air control reversing valve 5', so that the A' working port of the air control reversing valve 5' is communicated with the P' air inlet of the air control reversing valve 5'; the second air control valve 4' and the air control reversing valve 5' are connected to control the air control reversing valve 5' to start the B' working port of the air control reversing valve 5', so that the B' working port of the air control reversing valve 5' is communicated with the P' air inlet of the air control reversing valve 5'.

[0004] The working process of the above-mentioned energy-saving hydraulic station is as follows: the pneumatic piston is located in the left side of the cylinder 1', the first air control valve 3' is triggered to open, the air control reversing valve 5' is pushed to reverse, compressed air enters the cylinder 1' from the A' working port, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to move to the right (the first air control valve 3' resets to stop), driving the oil cylinder piston in the oil cylinder 2' to move to the right; the pneumatic piston moves to the right side of the cylinder 1', the second air control valve 4' is triggered to open, the air control reversing valve 5' is pushed to reverse, compressed air enters the cylinder 1' from the B' working port, and enters the space on the right side of the pneumatic piston, thereby pushing the pneumatic piston to move to the left (the second air control valve 4' resets to stop), driving the oil cylinder piston in the oil cylinder 2' to move to the left, so that the hydraulic oil is in and out; the reciprocating movement of the cylinder 1' forms continuous hydraulic output, when the set pressure is reached, the cylinder 1' stops moving to keep the pressure constant, the cylinder 1' keeps the pressure increasing state and stops moving, so that compressed air is not consumed any more, compared with the traditional hydraulic station, the energy consumption and heat generation are reduced, and the energy-saving purpose is achieved.

[0005] The hydraulic station is generally provided with an elastic core shaft on the cylinder end cover, and the core shaft is moved by the pneumatic piston moving to the end portion to trigger the reversing trigger device to make the reversing valve reverse, so that the cylinder piston reverses, and the oil cylinder is continuously supplied with oil through the reciprocating cycle, the reversing trigger device can be an electromagnetic induction switch, an electromagnetic contact switch or a mechanical valve, and the reversing trigger device has a certain triggering stroke, and in the case that the air source pressure is low or fluctuates greatly, for example, the air source pressure is unstable due to other air units (air gun, etc.) on the air path, the supply air pressure is low, the core shaft cannot move to the triggering stroke, the reversing valve cannot normally reverse, and the cylinder piston is stuck, so that the oil cylinder cannot continuously supply oil. Practical new type content

[0006] In view of this, the utility model provides a kind of cylinder for pneumatic hydraulic station and pneumatic hydraulic station, to solve the problem of existing hydraulic station stuck.

[0007] In one aspect, the utility model provides a kind of cylinder for pneumatic hydraulic station, the cylinder includes cylinder body, the cylinder piston that can slide along cylinder body inner wall and forms airtight seal with cylinder body inner wall, is arranged in the cylinder body both ends to seal cylinder body with cylinder end cover;The cylinder is connected with the reversing valve assembly for controlling the reversing movement of the cylinder piston;The cylinder piston divides the cylinder into two cylinder cavities, and the two cylinder cavities are communicated with compressed gas and the outside to drive the cylinder piston reciprocating movement in sequence by the reversing valve assembly respectively;The reversing valve assembly includes reversing trigger device that can send the cylinder piston moves to position signal and reversing valve that switches the two cylinder cavities intake and exhaust in sequence according to the signal of the reversing trigger device;Auxiliary exhaust valve is arranged on the cylinder end cover of the both ends of the cylinder body, for opening when another cylinder cavity intake, to unload the air pressure in the cylinder cavity of the auxiliary exhaust valve corresponding, to make the cylinder piston continue to move to the direction of the cylinder end cover of the cylinder cavity side under the air pressure in the other cylinder cavity, to trigger the reversing trigger device.

[0008] Further, the cylinder for pneumatic hydraulic station, the auxiliary exhaust valve includes: valve body and valve core;Wherein, the valve body is provided with valve cavity, the valve core is arranged in the valve cavity in a slidable manner, to seal state and open state are slid;The valve body is provided with first communication channel, second communication channel;The both ends of the first communication channel are connected with the first end of the valve cavity, the cylinder cavity corresponding to the auxiliary exhaust valve respectively, and the valve core is in sealing state when the cylinder cavity intake and the other cylinder cavity exhaust;The one end of the second communication channel is connected with the second end of the valve cavity, and the other end is connected with the other cylinder cavity, and the valve core is in open state when the other cylinder cavity intake and the cylinder cavity exhaust.

[0009] Further, the cylinder for the pneumatic hydraulic station, the valve body is further provided with an auxiliary exhaust passage, when the valve core is in the open state, the first communication passage is communicated with the auxiliary exhaust passage to exhaust.

[0010] Further, the cylinder for the pneumatic hydraulic station, the first gap is arranged between the valve core and the valve body, and the first communication passage and the auxiliary exhaust passage form an auxiliary exhaust passage through the first gap.

[0011] Further, the cylinder for the pneumatic hydraulic station, the valve core is provided with a sealing ring, and when the valve core is in the sealing state, the sealing ring seals the first gap to cut off the auxiliary exhaust passage.

[0012] Further, the cylinder for the pneumatic hydraulic station, the valve body is provided with an open limiting portion for limiting and supporting the valve core to make the valve core in the open state, and is provided with a sealing limiting portion for limiting and supporting the valve core to make the valve core in the sealing state.

[0013] Further, the cylinder for the pneumatic hydraulic station, the valve core is in the open state, and the valve core has a second gap between the end of the smaller radial dimension section and the first end wall of the valve cavity.

[0014] Further, the cylinder for the pneumatic hydraulic station, when the valve core is in the open state, the valve core has a second gap between the end of the smaller radial dimension section and the first end wall of the valve cavity.

[0015] Further, the cylinder for the pneumatic hydraulic station, when the valve core is in the open state, the valve core has a second gap between the end of the smaller radial dimension section and the first end wall of the valve cavity.

[0016] On the other hand, the utility model further provides a pneumatic hydraulic station, is equipped with the above-mentioned cylinder for the pneumatic hydraulic station.

[0017] The utility model provides a cylinder for pneumatic hydraulic station and pneumatic hydraulic station, two cylinder end covers all are equipped with auxiliary exhaust valve, open in another cylinder cavity admission, with the pressure of auxiliary exhaust valve corresponding cylinder cavity can be unloaded, especially when the reversing valve is in the neutral state and the auxiliary exhaust valve corresponding cylinder cavity admits and another cylinder cavity does not exhaust, the pressure of the cylinder cavity is unloaded through the auxiliary exhaust valve, and then the cylinder piston of the cylinder can continue to move to the direction of the cylinder end cover of the cylinder cavity under the action of the pressure in another cylinder cavity, thereby triggering the reversing trigger device to control the reversing of the reversing valve, until the corresponding exhaust port and the air inlet are communicated, thereby avoiding the cylinder piston stop moving to no longer output hydraulic pressure, that is, avoiding the cylinder, the reversing valve and other phenomena such as stuck, tool loses pressure and leads to workpiece clamping not tight, and the like, and simultaneously, the auxiliary exhaust valve also seals when the auxiliary exhaust valve corresponding cylinder cavity admits, avoids the pressure relief of the air inlet cavity, and guarantees the stability of the movement of the cylinder piston. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0019] Figure 1 It is a structure schematic view of the hydraulic station provided in the prior art;

[0020] Figure 2 It is a structure schematic view of the stuck state of the reversing valve provided in the prior art;

[0021] Figure 3 It is a structure schematic view of the cylinder moving to the left in the T-shaped valve core type pneumatic hydraulic station provided in the utility model embodiment, wherein the position core shaft between the first air control valve, the second air control valve and the cylinder piston all have gaps, and the reversing valve is a double-side air control type reversing valve;

[0022] Figure 4 It is a structure schematic view in the T-shaped valve core type pneumatic hydraulic station provided in the utility model embodiment, wherein the reversing valve moves to the right to the state that B port and P port are communicated to start admission, but A port is not communicated exhaust port S (exhaust is not opened);

[0023] Figure 5 It is a structure schematic view of the cylinder moving to the left in the T-shaped valve core type pneumatic hydraulic station provided in the utility model embodiment, wherein the position core shaft between the first air control valve, the second air control valve and the cylinder piston all have gaps, and the reversing valve is a double-side air control type reversing valve; Figure 4 It is a local enlarged view of L in the utility model embodiment;

[0024] Figure 6 It is a local enlarged view of O in the utility model embodiment; Figure 4 It is a local enlarged view of O in the utility model embodiment;

[0025] Figure 7 The structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model, wherein the first air control valve and the second air control valve have gaps between the position shaft and the cylinder piston;

[0026] Figure 8 The structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model, wherein the first air control valve and the second air control valve have gaps between the position shaft and the cylinder piston; Figure 3 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model;

[0027] Figure 9 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model; Figure 8 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model;

[0028] Figure 10 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model; Figure 3 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model;

[0029] Figure 11 The local enlarged view of M in the structure schematic diagram of the right moving process of the cylinder in the T-shaped valve core type pneumatic hydraulic station is provided for the embodiment of the utility model;

[0030] Figure 12 The structure schematic diagram of the pneumatic hydraulic station is provided for the embodiment of the utility model, wherein the reversing valve is a spring reset type air control reversing valve;

[0031] Figure 13 The structure schematic diagram of the pneumatic hydraulic station is provided for the embodiment of the utility model, wherein the reversing valve is an air control reversing valve disclosed in CN119163771A;

[0032] Mark 1-cylinder, 11-cylinder piston, 12-first air cavity, 13-second air cavity, 2-oil cylinder, 21-oil cylinder piston, 3-first air control valve, E-second air inlet, C-third air outlet, 4-second air control valve, 41-position shaft, 42-air control valve core reset spring, F-third air inlet, D-fourth air outlet, 5-reversing valve, P-first air inlet, A-first working port, B-second working port, Y-first control port, Z-second control port, R-first air outlet, S-second air outlet, 51-reset spring, 6-linkage rod, 7-assisted air exhaust valve, 71-valve body, 711-valve cavity, 7111-first end of the valve cavity, 7112-second end of the valve cavity, 712-opening limiting part, 713-sealing limiting part, 72-valve core, 721-radial dimension larger section, 722-radial dimension smaller section, 73-first communication channel, 74-second communication channel, 75-assisted air exhaust channel, 76-third communication channel, 77-sealing ring, 78-limiting plug, H-second communication port, K-assisted air exhaust port, G-first communication port, J-air exhaust communication port, 79-first gap, 710-second gap. DETAILED DESCRIPTION

[0033] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0034] It is well known in the art that, in order to avoid the simultaneous exhaust of the cavities on both sides of the cylinder, the air control reversing valve 5' has the characteristic of advanced exhaust, that is, the communication port corresponding to the air inlet is connected first, and the communication port corresponding to the external exhaust port is connected delayed.

[0035] As shown in Figure 2 When the air control reversing valve core is pushed to move to the right, that is, the A' working port is switched from air intake to exhaust, and the B' working port is switched from exhaust to air intake, when moving to the A' working port air intake is closed and the exhaust is not opened, the B' working port exhaust is closed and the air intake is just opened, that is, the B' working port just air intake, and the A' working port intake and exhaust are both closed, because the air cavity connected with the A' working port has a larger pressure, the air cavity connected with the B' working port is from the B' working port air intake, so that both ends of the cylinder have pressure, and the pilot valve corresponding to the air cavity connected with the B' working port is reset and closed, or the gas source pressure is smaller, so that the air pressure pushing the air control reversing valve core to move to the right is smaller, resulting in the air control reversing valve being stuck. The reversing valve being stuck causes the cylinder piston to stop moving, resulting in no longer outputting hydraulic pressure, and the tool losing pressure, causing the workpiece to be not clamped tightly, the tool to be hit, and other problems.

[0036] Referring to Figures 3 to 11 , a preferred structure of the pneumatic hydraulic station provided by the embodiment of the present application is shown. As shown in the figure, the pneumatic hydraulic station comprises: a cylinder 1, an oil cylinder 2, and a reversing valve assembly.

[0037] The oil cylinder piston 21 of the oil cylinder 2 is connected with the cylinder piston 11 of the cylinder 1 through a linkage rod 6, the linkage rod 6 is slidably arranged in the cylinder end cover (such as Figure 3 the left cylinder end cover shown in the figure) of the cylinder 1 near the oil cylinder 2, so that the oil cylinder piston 21 synchronously slides with the cylinder piston 11, so as to control the clamping and loosening of the clamping tool of the machine tool by oil in and out.

[0038] Specifically, the gas cylinder 1 is provided with a through hole, and the gas cylinder 1 and the oil cylinder 2 are communicated through the through hole. The gas cylinder 1 is provided with a gas cylinder piston 11 in contact with the inner wall, and the oil cylinder 2 is provided with an oil cylinder piston 21 in contact with the inner wall. The gas cylinder piston 11 and the oil cylinder piston 21 are connected through a linkage rod 6, and the linkage rod 6 passes through the through hole. In this embodiment, the two ends of the linkage rod 6 are fixedly connected with the gas cylinder piston 11 and the oil cylinder piston 21 respectively, so as to realize linkage between the gas cylinder 1 and the oil cylinder 2. In this embodiment, a single oil cylinder is taken as an example for illustration, and of course, it can also be a double oil cylinder, which is not limited in this embodiment. In this embodiment, the piston area of the gas cylinder piston 11 is greater than the piston area of the oil cylinder piston. In this embodiment, the piston area of the gas cylinder piston 11 can be six times greater than the piston area of the oil cylinder piston 21, so as to facilitate the calculation of pressure. For example, if the piston area of the gas cylinder piston 11 is six times greater than the piston area of the oil cylinder piston 21, then the gas cylinder 1 outputs 1 bar of pressure, and the oil cylinder 2 outputs 6 bar of pressure.

[0039] The gas cylinder 2 is connected with a reversing valve assembly for controlling the reversing movement of the gas cylinder piston 11 of the gas cylinder 1. The reversing valve assembly includes a reversing trigger device capable of sending a signal that the gas cylinder piston 11 is moved to a position, and a reversing valve 5 capable of sequentially switching the air inlet and exhaust of the two gas cylinder cavities of the gas cylinder 1 according to the signal of the reversing trigger device.

[0040] Specifically, the reversing trigger device can be two, which are respectively arranged at the two ends of the gas cylinder 1, so as to respectively obtain whether the gas cylinder piston 11 is moved to a position at the two ends, and can send a corresponding signal that the gas cylinder piston 11 is moved to a position when the gas cylinder piston 11 is moved to a position at the two ends. The reversing valve 5 is connected with the reversing trigger device, and sequentially switches the air inlet and exhaust of the two gas cylinder cavities of the gas cylinder 1 according to the signal that the gas cylinder piston 11 is moved to a position sent by the reversing trigger device.

[0041] In one embodiment of this embodiment, as shown in Figures 3 to 10 The reversing trigger device is two and both are air control valves, which are respectively a first air control valve 3 and a second air control valve 4, and are respectively arranged on the two gas cylinder end covers of the gas cylinder 1. The reversing valve 5 is a corresponding air control reversing valve.

[0042] Continuing to refer to 3 to Figure 10, the first inlet port P of the reversing valve 5, the second inlet port E of the first pneumatic control valve 3, and the third inlet port F of the second pneumatic control valve 4 are connected with the air source respectively; the reversing valve 5 includes a first control port Y and a second control port Z, a first working port A and a second working port B which are connected with the two cylinder cavities on both sides of the piston of the cylinder 1 respectively; the third exhaust port C of the first pneumatic control valve 3 is connected with the first control port Y, and after the first pneumatic control valve 3 is triggered to open, a first moving-to-position signal is sent to the reversing valve 5, and the reversing valve 5 is reversed based on the first moving-to-position signal to connect the second working port B with the first inlet port P; the fourth exhaust port D of the second pneumatic control valve 4 is connected with the second control port Z, and after the second pneumatic control valve 4 is triggered to open, a second moving-to-position signal is sent to the reversing valve 5, and the reversing valve 5 is reversed based on the second moving-to-position signal to connect the first working port A with the first inlet port P. That is to say, after the first pneumatic control valve 3 is triggered to open by the cylinder piston 11, the reversing valve 5 is controlled to connect the second working port B with the first inlet port P; the fourth exhaust port D of the second pneumatic control valve 4 is connected with the second control port Z, and after the second pneumatic control valve 4 is triggered to open by the cylinder piston 11, the reversing valve 5 is controlled to connect the first working port A with the first inlet port P, that is, the reversing trigger device is the pneumatic control valve, and when the cylinder piston 11 moves to the position, the corresponding reversing trigger device, i.e. the pneumatic control valve, can be triggered to open, so as to inject air into the corresponding control port of the reversing valve 5 to pressurize the control port, so as to drive the reversing valve 5 to reverse, that is to say, after the reversing trigger device is triggered to open, the corresponding control port of the reversing valve 5 is first injected with air to pressurize the control port as a moving-to-position signal, i.e. a pneumatic control signal, to control the reversing valve 5 to reverse.

[0043] Specifically, the first pneumatic control valve 3 is arranged at one end (e.g. the left end as shown in the drawings) of the cylinder 1, the second pneumatic control valve 4 is arranged at the other end (e.g. the right end as shown in the drawings) of the cylinder 1, and the first pneumatic control valve 3 and the second pneumatic control valve 4 are both partially protruded into the cylinder cavities on both sides of the cylinder piston 11, so that the cylinder piston 11 can trigger the first pneumatic control valve 3 and the second pneumatic control valve 4 to open when moving to the left and right positions respectively. Figure 3 Figure 3 Specifically, the first pneumatic control valve 3 is arranged at one end (e.g. the left end as shown in the drawings) of the cylinder 1, the second pneumatic control valve 4 is arranged at the other end (e.g. the right end as shown in the drawings) of the cylinder 1, and the first pneumatic control valve 3 and the second pneumatic control valve 4 are both partially protruded into the cylinder cavities on both sides of the cylinder piston 11, so that the cylinder piston 11 can trigger the first pneumatic control valve 3 and the second pneumatic control valve 4 to open when moving to the left and right positions respectively. Figure 3 ​As shown, when the cylinder piston 11 slides to the left end under air pressure, the cylinder piston 11 can touch the starting block to activate the first air control valve 3, causing the starting block and the valve core of the air control valve to slide to the left until the third exhaust port C and the second air inlet E are connected, thereby connecting the air source and the first control port Y. This allows pressure to be applied to the control chamber corresponding to the first control port Y, causing the reversing valve 5 to slide and reverse, that is, pushing the valve core of the reversing valve 5 to move to the right and switch to the position where the second working port B is connected to the first air inlet P. In other words, the reversing valve 5 is controlled to connect the second working port B and the first air inlet P, thereby allowing the cylinder piston 11 to slide to the right.

[0044] In this embodiment, both the first pneumatic control valve 3 and the second pneumatic control valve 4 are provided with a position spindle 41 at their trigger ends. The position spindle 41 is slidably mounted on the cylinder body of the cylinder 1 along the movement direction of the cylinder piston 11. When the cylinder piston 11 slides to its end position, it pushes the corresponding position spindle to slide with the cylinder piston 11, thereby actuating the valve core of the first pneumatic control valve 3 or the second pneumatic control valve 4 to move synchronously, thereby realizing the trigger opening of the first pneumatic control valve 3 or the second pneumatic control valve 4.

[0045] Specifically, the valve body of cylinder 1 has mounting holes on the two side plates (i.e., cylinder end caps) corresponding to the piston 11 on both sides. Each mounting hole has a position mandrel that is slidably connected to it. This position mandrel slides through the cylinder end cap of cylinder 1 and seals the mounting hole. The end of the position mandrel outside cylinder 1 is connected to either the first pneumatic control valve 3 or the second pneumatic control valve 4 to drive the corresponding valve core. For example... Figure 3 The right end of the left-side position mandrel 41 is in contact with the valve core of the first pneumatic control valve 3. When the cylinder piston 11 slides to the left near the left end position, the left side wall of the cylinder piston 11 is in contact with the right end of the left-side position mandrel 41 located in the cylinder cavity. This pushes the left-side position mandrel 41 to slide to the left synchronously with the cylinder piston 11 until the cylinder piston 11 slides to the right end position. During the sliding of the left-side position mandrel 41, the valve core of the first pneumatic control valve 3 moves to the left synchronously. When the valve core of the first pneumatic control valve 3 moves to the position of the third exhaust port C and the second air inlet E, the first pneumatic control valve 3 can be activated and opened. This causes the reversing valve 5 to switch to the position where the second working port B is connected to the first air inlet P, allowing the cylinder piston 11 to slide to the right. When the cylinder piston 11 slides to the right, the valve core of the first pneumatic control valve 3 can be reset under the action of the pneumatic control valve core reset spring 42, and push the left position spindle to slide to the right synchronously, so as to realize the reset of the first pneumatic control valve 3 and the left position spindle 41.

[0046] In this embodiment, the movement of the right position spindle 41 and the working process of the second pneumatic control valve 4 can be referred to the movement of the left position spindle 41 and the activation and opening process of the first pneumatic control valve 3, and will not be described again here.

[0047] In this embodiment, the structure of the second pneumatic control valve 4 is similar to that of the first pneumatic control valve 3. Specifically, the second pneumatic valve 4 has a fourth exhaust port D and a third air inlet F, which are respectively connected to the second control port Z and the air source. When the cylinder piston 11 slides to the right end under air pressure, the cylinder piston 11 can activate and start the second pneumatic control valve 4, connecting the fourth exhaust port D and the third air inlet F. This connects the second control port Z and the air source, thereby pressurizing the control chamber corresponding to the second control port Z. This causes the reversing valve 5 to slide to the left, switching to the position where the first working port A and the first air inlet P are connected. In other words, the reversing valve 5 connects the first working port A and the first air inlet P, allowing the cylinder piston 11 to slide to the left. The specific structure and working principle of the second pneumatic control valve 4 can be referred to the first pneumatic control valve 3; therefore, the second pneumatic control valve 4 will not be described in detail here.

[0048] In the implementation method, the directional valve 5 in the pneumatic hydraulic station can be as follows: Figure 3 The double-sided pneumatically controlled directional valve shown refers to the two ends of directional valve 5 (e.g., Figure 3 The left and right ends (as shown) are connected to the first control port Y and the second control port Z to control the switching of the reversing valve 5. Of course, as... Figure 12 As shown, the reversing valve 5 can also be a spring-reset pneumatic reversing valve. For example, the left end of the reversing valve 5 is provided with a first control port Y, and the right end is provided with a return spring 51. The third air inlet F of the second pneumatic valve 4 is connected to the third exhaust port C, and the fourth exhaust port D is connected to the outside. When the second pneumatic valve 4 is triggered, the third air inlet F is connected to the fourth exhaust port D to exhaust the third exhaust port C and the first control port Y. When the first control port Y is inlet after the first pneumatic valve 3 is triggered, the valve core of the reversing valve 5 can move to the right and compress the return spring 51 until the valve core of the reversing valve 5 moves to the right until the second working port B is connected to the first air inlet P and the first working port A is connected to the second exhaust port S. The cylinder piston 11 moves to the right, releasing the triggering of the first pneumatic valve 3, and keeping the pressure at the left end of the reversing valve 5, so that the valve core of the reversing valve 5 remains in the same position. And when the cylinder piston 11 moves to the right and reaches its position, it triggers the second pneumatic control valve 4 to open the exhaust of the first control port Y. The valve core of the reversing valve 5 can move to the left under the restoring force of the return spring 51 until the first working port A is connected to the first intake port P and the second working port B is connected to the first exhaust port R. Of course, if Figure 13As shown, the composite reversing valve can also be a gas-controlled reversing valve disclosed in Chinese Patent No. CN119163771A, i.e., a reversing valve with size cavity reversing switching. The working modes of the first gas control valve 3 and the second gas control valve 4 can refer to the spring return type gas-controlled reversing valve.

[0049] In another embodiment of the present embodiment, the reversing trigger device can be an electric control valve, and the reversing valve is a corresponding electromagnetic control valve. When the cylinder piston 11 moves to the position, an electric signal can be sent to the reversing valve, and the reversing valve switches based on the electric signal to switch the intake and exhaust of the two cylinder cavities.

[0050] Specifically, the moving-to-position signal is an electric signal, the reversing trigger device can be an electric control valve and two, respectively arranged on the two cylinder end covers of the cylinder 1 to obtain whether the cylinder piston 11 moves to the position when moving to the two ends. When the cylinder piston 11 moves to the position, the reversing trigger device sends the moving-to-position signal of the corresponding side to the reversing valve, and the reversing valve 5 switches the intake and exhaust of the two cylinder cavities based on the moving-to-position signal. For example, when the cylinder piston 11 moves to the left, the reversing trigger device arranged on the left cylinder end cover of the cylinder can send the moving-to-position signal to the reversing valve 5, and the reversing valve 5 switches based on the moving-to-position signal to connect the first working port A and the first intake port P to switch the right cylinder cavity of the cylinder 1 to intake and the left cylinder cavity to exhaust, so that the cylinder piston 11 moves to the right. When the cylinder piston 11 moves to the right, the reversing trigger device arranged on the right cylinder end cover of the cylinder can send the moving-to-position signal to the reversing valve 5, and the reversing valve 5 switches based on the moving-to-position signal to connect the second working port B and the first intake port P to switch the left cylinder cavity of the cylinder 1 to intake and the right cylinder cavity to exhaust.

[0051] Continuing to refer to Figure 3 , the cylinder 1 includes a cylinder body, a cylinder piston 11 and cylinder end covers. The cylinder piston 11 can slide along the inner wall of the cylinder body and form a gas-tight seal with the inner wall of the cylinder body. The cylinder end covers are arranged at both ends of the cylinder body to seal the cylinder body.

[0052] Continuing to refer to Figure 3 , the cylinder end covers at both ends of the cylinder body have an auxiliary exhaust function. Specifically, the cylinder end covers at both ends of the cylinder body are respectively provided with an auxiliary exhaust valve 7. The two auxiliary exhaust valves 7 respectively correspond to the two cylinder cavities (such as the left and right cavities shown in Figure 3 , and are used to open when the other cylinder cavity is intaking to unload the gas pressure in the cylinder cavity corresponding to the auxiliary exhaust valve, so that the cylinder piston can continue to move to the direction of the cylinder end cover of the other cylinder cavity under the action of the gas pressure in the cylinder cavity, thereby triggering the reversing trigger device.

[0053] Specifically, the two auxiliary exhaust valves 7 respectively correspond to the two cylinder cavities (such as the left and right cavities shown inFigure 3 The left and right auxiliary exhaust valves 7 correspond to the left and right cylinder cavities of the cylinder 1 respectively, and the left auxiliary exhaust valve 7 corresponds to the first cylinder cavity 12 of the cylinder 1, and the right auxiliary exhaust valve 7 corresponds to the second cylinder cavity 13 of the cylinder 1. The auxiliary exhaust valve 7 is used to open when the cylinder cavity corresponding to the auxiliary exhaust valve 7 exhausts and the other cylinder cavity inhales, so as to unload the air pressure of the cylinder cavity corresponding to the auxiliary exhaust valve 7, especially when the reversing valve is in the neutral state and the cylinder cavity corresponding to the auxiliary exhaust valve inhales and the other cylinder cavity does not exhaust, the air pressure of the cylinder cavity is unloaded through the auxiliary exhaust valve 7, so that the cylinder piston 11 of the cylinder 1 can continue to move to the side of the cylinder head of the cylinder cavity under the action of the air pressure in the other cylinder cavity, such as the original air pressure in the other cylinder cavity, so as to trigger the reversing trigger device on the cylinder head, such as the first air control valve 3 or the second air control valve 4 on the cylinder head, to continue to control the reversing valve 5 to continue to reverse, until the corresponding exhaust port and the intake port are connected, and the auxiliary exhaust valve 7 is sealed when the cylinder cavity corresponding to the auxiliary exhaust valve 7 inhales and the other cylinder cavity exhausts. Of course, the reversing trigger device can also be an electric control device, which can ensure that the cylinder piston 11 continues to move to the side of the cylinder head of the cylinder cavity, so as to ensure that the cylinder piston 11 can move to the position, and then ensure that the reversing trigger device can send a signal to move to the position, so as to avoid that the cylinder piston 11 is stuck in the middle position. In this embodiment, the intake pressure required for the auxiliary exhaust valve 7 to switch is large, that is, when the reversing valve 5 is reversed to the position and the intake and exhaust are connected, the intake pressure is large, so as to drive the auxiliary exhaust valve 7 to switch between the open and sealed states.

[0054] In this embodiment, when the second cylinder cavity 13 inhales and the first cylinder cavity 12 exhausts, the auxiliary exhaust valve 7 corresponding to the second cylinder cavity 13, that is, the right auxiliary exhaust valve 7 as shown, switches to the sealed state, and the auxiliary exhaust valve 7 corresponding to the first cylinder cavity 12, that is, the left auxiliary exhaust valve 7 as shown, switches to the open state. Figure 3 Figure 3 ​The left auxiliary exhaust valve 7 is switched to the open state. Specifically, from the time when the first working port A is communicated with the first intake port P and the second working port B is communicated with the first exhaust port R, to the time when the second working port B is communicated with the first intake port P and the first working port A is communicated with the second exhaust port S, that is, from the time when the second air chamber 13 is inhaled and the first air chamber 12 is exhausted, to the time when the first air chamber 12 is inhaled and the second air chamber 13 is exhausted, the right auxiliary exhaust valve 7 is in the sealing state, and the left auxiliary exhaust valve 7 is in the open state; in particular, when the reversing valve is in the neutral state and the second working port B is just communicated with the first intake port P and the first working port A is not communicated with the second exhaust port S, that is, when the first air chamber 12 is inhaled and the second air chamber 13 is not exhausted, the right auxiliary exhaust valve 7 is in the sealing state, and the left auxiliary exhaust valve 7 is in the open state, the left auxiliary exhaust valve 7 exhausts the intake air in the first air chamber 12, so that the cylinder piston 11 can continue to move to the direction of the cylinder head on the side of the first air chamber 12, that is, continue to move to the left under the action of the air pressure in the second air chamber 13, until the cylinder piston 11 can be moved to the position, the first air control valve 3 can be triggered, and then the reversing valve 5 is controlled to continue to reverse, so as to reverse to the position where the second working port B is communicated with the first intake port P and the first working port A is communicated with the second exhaust port S.

[0055] In this embodiment, as shown in Figure 7 When the first air chamber 12 is inhaled and the second air chamber 13 is exhausted, the auxiliary exhaust valve 7 corresponding to the second air chamber 13 is switched to the open state, that is, the right auxiliary exhaust valve 7 as shown in Figure 7 When the first air chamber 12 is inhaled and the second air chamber 13 is exhausted, the auxiliary exhaust valve 7 corresponding to the second air chamber 13 is switched to the open state, that is, the right auxiliary exhaust valve 7 as shown in Figure 7The left auxiliary exhaust valve 7 is switched to the sealing state. Specifically, from the time when the second working port B is communicated with the first intake port P and the first working port A is communicated with the second exhaust port S, to the time when the first working port A is communicated with the first intake port P and the second working port B is communicated with the first exhaust port R, that is, from the time when the first air chamber 12 is inhaled and the second air chamber 13 is exhausted, to the time when the second air chamber 13 is inhaled and the first air chamber 12 is exhausted, the right auxiliary exhaust valve 7 is in the open state, and the left auxiliary exhaust valve 7 is in the sealing state; in particular, when the reversing valve is in the neutral state, the first working port A is just communicated with the first intake port P, and the second working port B is not communicated with the first exhaust port R, that is, the second air chamber 13 is inhaled and the first air chamber 12 is not exhausted, the right auxiliary exhaust valve 7 is in the open state, and the left auxiliary exhaust valve 7 is in the sealing state, the right auxiliary exhaust valve 7 exhausts the intake air in the second air chamber 13, so that the cylinder piston 11 can continue to move to the direction of the cylinder head of the second air chamber 13, that is, continue to move to the right under the action of the air pressure in the first air chamber 12, until the cylinder piston 11 can be moved to the position, the second air control valve 4 can be triggered, and then the reversing valve 5 is controlled to continue to reverse, so as to reverse to the position where the first working port A is communicated with the first intake port P and the second working port B is communicated with the first exhaust port R.

[0056] As Figure 3As shown, the first working port A is communicated with the first inlet port P, and the second working port B is communicated with the first exhaust port R, at this time, the first gas cavity 12 exhausts, and the second gas cavity 13 inhales, that is, when the cylinder piston 11 slides to the left, under the action of the second gas cavity 13, the left auxiliary exhaust valve 7 opens, and the right auxiliary exhaust valve 7 seals. For the prior art, when the gas source pressure is insufficient or the exhaust is blocked during the movement of the cylinder piston 11 to the left, the cylinder piston 11 cannot continue to move to the left, that is, it cannot move to the left in place, and the left reversing trigger device cannot be triggered. In the embodiment, the first gas cavity 12 can exhaust through the left auxiliary exhaust valve 7 to unload the gas pressure in the first gas cavity 12, so that the pressure in the first gas cavity 12 becomes smaller, and the pressure in the second gas cavity 13 remains, so as to continuously push the cylinder piston 11 to move to the left to continuously open the first gas control valve 3, that is, to trigger the reversing trigger device, thereby avoiding the problem of the cylinder piston 11 being stuck. At the same time, during the movement of the cylinder piston 11 to the left, the position core shaft 41 of the first gas control valve 3 can be pushed. For the prior art, the reversing valve 5 is stuck in the middle position, that is, the AB port is closed. Since the first gas cavity 12 can exhaust through the left auxiliary exhaust valve 7 in the present application, the pressure in the first gas cavity 12 becomes smaller, and the pressure in the second gas cavity 13 remains, so as to continuously push the cylinder piston to move to the left to continuously open the first gas control valve 3, and then continuously push the valve core of the reversing valve 5 to move to the right. When the first gas control valve 3 is just opened, the third exhaust port C and the second inlet port E are initially communicated, the gas source and the first control port Y are initially communicated, the control cavity corresponding to the first control port Y is pressurized, the valve core of the reversing valve 5 slides to the right, and the cylinder piston 11 moves to the right until the first working port A is closed and the exhaust is not opened, as shown in Figure 6 As shown, the first working port A inhales, and the exhaust is not opened, as shown in Figure 5 As shown, the second working port B exhausts, and the inlet is just opened. Since the second working port B is just communicated with the first inlet port P, the inlet pressure is small and insufficient to switch the two auxiliary exhaust valves 7, as shown in Figure 4 As shown, the inlet of the second working port B is exhausted through the left auxiliary exhaust valve 7, the exhaust of the first working port A is not opened, and the right auxiliary exhaust valve 7 is in a sealing state. Therefore, since the pressure in the second gas cavity 13 remains, the cylinder piston continuously moves to the left to continuously open the first gas control valve 3, and then continuously pushes the valve core of the reversing valve 5 to move to the right until it moves to the right end and reverses in place, as shown in Figure 7As shown, at this time, the second working port B is connected to the first air inlet P and the first working port A is connected to the second exhaust port S, that is, air enters the first air chamber 12 and exhausts from the rodless cylinder 13, causing the cylinder piston 11 to move to the right. At the same time, under the action of the air inlet pressure of the first air chamber 12, the right auxiliary exhaust valve 7 switches to the open position and the left auxiliary exhaust valve 7 switches to the sealed position. It can be seen that the auxiliary exhaust valve 7 can assist in exhausting when the exhaust port connected to the cylinder body is blocked, that is, relieve the air pressure in the cylinder body, and can also cooperate with the exhaust port connected to the cylinder body to exhaust, avoiding jamming during the reversing process of the reversing valve 5, and also avoiding jamming of the cylinder piston 11. Among them, in Figure 4 In, such as Figure 5 As shown, there is a gap between the second working port B and the valve core of the reversing valve 5, that is, the second working port B and the first air inlet P have just opened, meaning that the second working port B is used as an air inlet and has just opened. Figure 6 As shown, the first working port A is sealed with the valve core of the reversing valve 5, that is, the first working port A is not open with the exhaust port, meaning that the exhaust is not open. Furthermore, the first working port A is disconnected from the first air inlet P, meaning that the air inlet side of the first working port A is closed and the exhaust side is not open.

[0057] When the cylinder piston 11 moves to the right and triggers the second pneumatic control valve 4, causing the valve core of the reversing valve 5 to move to the left, its movement process can be referred to the triggering of the first pneumatic control valve 3 and the process of the valve core of the reversing valve 5 moving to the right. In this embodiment, the process of the valve core of the reversing valve 5 moving to the left will not be described in detail.

[0058] The working process of the electromagnetic control valve can be referred to the working process of the pneumatically controlled directional valve assembly described above, and will not be repeated here.

[0059] See also Figure 3 , Figures 8 to 10 The auxiliary exhaust valve 7 includes: valve body 71 and valve core 72.

[0060] The valve body 71 has a valve cavity 711, and the valve core 72 is slidably disposed within the valve cavity 711 to slide to a sealing state (e.g., Figure 3 The position of the valve core 72 of the right auxiliary exhaust valve 7 shown) and the open state (as shown) Figure 3 The position of the valve core 72 of the left auxiliary exhaust valve 7 shown.

[0061] Specifically, the valve body 71 and the cylinder end cover can be an integral structure. That is, the cylinder end cover serves as the valve body of the auxiliary exhaust valve, and it has a valve chamber 711. The valve core 72 is slidably disposed within the valve chamber 711. The valve chamber 711 is connected to the cylinder cavity corresponding to the auxiliary exhaust valve 7, allowing it to switch between a sealed state and an open state. In the sealed state, the cylinder cavity corresponding to the auxiliary exhaust valve 7 is sealed, allowing air intake into the cylinder cavity. In the open state, the cylinder cavity corresponding to the auxiliary exhaust valve 7 is opened, so that when exhaust from the cylinder cavity is blocked, or when air intake is just beginning, the auxiliary exhaust valve 7 can unload or depressurize, thus expelling the gas from the cylinder cavity corresponding to the auxiliary exhaust valve 7. The valve chamber 711 is a sealed cavity and may have a connecting port to connect to other cavities.

[0062] The valve body 71 is provided with a first connecting channel 73 and a second connecting channel 74, and the two ends of the first connecting channel 73 (e.g. Figure 8 The left and right ends shown are respectively connected to the first end 7111 of the valve cavity 711 (as shown). Figure 8 The bottom end shown) is connected to the cylinder cavity corresponding to the auxiliary exhaust valve 7, i.e., the first air chamber 12. The valve core 72 is in a sealed state when air is entering the first air chamber 12 and exhausting from the other cylinder cavity, i.e., the second air chamber 13. Figure 8 The valve core state is shown; one end of the second connecting channel 73 (as shown) Figure 8 The lower end shown) and the second end 7112 of the valve cavity 711 (as shown) Figure 8 The top end (as shown) is connected, and the other end (as shown) is connected. Figure 8 The upper end shown is connected to another cylinder chamber, namely the second air chamber 13. The valve core 72 is in the open state when the other cylinder chamber is in the intake state, such as... Figure 10 The state of the valve core is shown.

[0063] Specifically, such as Figure 8 As shown, the valve body 71 is provided with a first communication port G that communicates with the first end 7111 of the valve cavity 711, and is connected to the first air cavity 12 through a first communication channel 73; the end of the valve body 71 (such as...) Figure 8The top end of the valve body 71 is provided with a second communication port H, which is connected with the second end 7112 of the valve cavity 711 through a second communication channel 74, and the second communication port H is connected with another cylinder cavity. When the cylinder cavity, i.e., the first gas cavity 12, is in an intake state and another cylinder cavity, i.e., the second gas cavity 13, is in an exhaust state, the gas at the second end 7112 of the valve cavity 711, i.e., the upper side of the valve core 72, is exhausted through another cylinder cavity and the second communication channel 73, so that the gas pressure at the upper side of the valve core 72 is removed, and the gas entering the cylinder cavity can enter the first end 7111 of the valve cavity 711, i.e., the lower side of the valve core 72, through the first communication channel 73, so that the gas pressure at the lower side of the valve core 72 is increased, and the valve core 72 can move upward to the sealing state to avoid exhaust in the cylinder cavity; the valve core 72 is in an open state when the other cylinder cavity is in an intake state, and the gas pressure in the cylinder cavity can be removed.

[0064] The valve body 71 is further provided with an auxiliary exhaust channel 75, and the first communication channel 73 is connected with the auxiliary exhaust channel 75 for exhaust when the valve core 72 is in an open state.

[0065] Specifically, the end of the valve body 71 (e.g., the top end) Figure 8 The valve body 71 is provided with an auxiliary exhaust port K, and the valve body 71 is provided with an exhaust communication port J on the upper side of the first communication port G, and the exhaust communication port J and the auxiliary exhaust port K are connected through an auxiliary exhaust channel 75. The first communication channel 73 is connected with the auxiliary exhaust channel 75 for exhaust when the valve core 72 is in an open state.

[0066] The valve core 72 and the valve body 71 are provided with a first gap 79, and the first communication channel 73 and the auxiliary exhaust channel 75 form an auxiliary exhaust passage through the first gap 79. Specifically, the valve core 72 and the side wall of the valve cavity 711 are in a gap fit, the first gap 79 is an annular gap between the valve core 72 and the side wall of the valve cavity 711, and the first gap 79 is connected with the first communication port G and the exhaust communication port J, respectively, to realize the connection between the first communication channel 73 and the auxiliary exhaust channel 75.

[0067] In this embodiment, the valve core 72 is provided with a sealing ring 77, and the sealing ring 77 seals the first gap 79 to cut off the auxiliary exhaust passage when the valve core 72 is in a sealing state, so as to realize the sealing of the corresponding cylinder cavity of the auxiliary exhaust valve 7. Specifically, the valve core 72 is provided with a sealing ring 77, which can slide synchronously with the valve core 72 to different positions, such as Figure 10 As shown, the sealing ring 77 can slide into the first gap 79 to block the first gap 79, so as to cut off the auxiliary exhaust passage. Of course, as shown, the sealing ring 77 can slide out of the first gap 79 to realize the connection between the first communication channel 73 and the auxiliary exhaust channel 75. Figure 8As shown, the first gap 79 can be sealed by the sealing ring 77, and the first gap 79 can be opened by sliding the sealing ring 77 to the first communication port G. In this embodiment, the sealing ring 77 can be multiple, and the sealing of multiple positions can be achieved. When the first gap 79 is opened, that is, there is no sealing ring 77, the first gap 79 between the first communication channel 73 and the exhaust communication port J and the first communication port G is communicated, and the first gap 79 between the exhaust communication port J and the first communication port G is communicated with the auxiliary exhaust channel 75, so that the gas in the first communication channel 73 can be discharged from the auxiliary exhaust channel 75, that is, as shown in Figure 8 As shown, the gas in the first gas cavity 12 communicated by the first communication channel 73 flows through the first communication channel 73, the first communication port G, the first gap 79 between the exhaust communication port J and the first communication port G, the exhaust communication port J, the auxiliary exhaust channel 75, and the auxiliary exhaust port K in turn, and is discharged to the outside of the cylinder, that is, the auxiliary exhaust port K can exhaust, realizing the exhaust of the first gas cavity 12, and further enabling the cylinder piston to continue to move to the left to ensure the triggering of the first gas control valve 3.

[0068] As shown, Figure 8 When the auxiliary exhaust valve 7 corresponds to the exhaust of the cylinder cavity and the intake of the other cylinder cavity, the gas enters the second end 7112 of the valve cavity 711 from the second communication channel 74, and under the action of the gas entering the second communication channel 74, the valve core 72 can slide forward (as shown in Figure 8 downward) until the open state as shown in Figure 8 to open the first gap 79 between the valve core 72 and the valve body 71, realize the communication between the auxiliary exhaust channel 75 and the first communication channel 73, and further enable the gas in the cylinder cavity corresponding to the auxiliary exhaust valve 7, that is, the first gas cavity 12, to be discharged from the auxiliary exhaust channel 75, realizing the pressure relief of the cylinder cavity corresponding to the auxiliary exhaust valve 7.

[0069] Specifically, as shown in Figure 3 and Figure 8 When the first gas cavity 12 exhausts and the second gas cavity 13 intakes, the gas discharged from the gas source flows through the first intake port P and the first working port A in turn, one way into the second gas cavity 13 as shown in Figure 10 and the other way into the second communication channel 74 of the auxiliary exhaust valve 7 as shown in Figure 8 and flows into the second end 7112 of the valve cavity 711, which can push the valve core 72 to move downward until the limit position, that is, the open state as shown in Figure 8 so that the lower sealing ring 77 on the valve core 72 moves downward from the first gap 79 between the exhaust communication port J and the first communication port G to the lower side of the first communication port G, that is, as shown in Figure 8At the position shown, the seal ring on the valve core 72 is not arranged on the section between the exhaust communication port J and the first communication port G, i.e. the first gap 79 between the exhaust communication port J and the first communication port G is opened; at the same time, at this position, a gap is also arranged between the lower seal ring 77 on the valve core 72 and the first communication port G, so that the gas discharged from the first communication passage 73 and the first gas cavity 12 can flow from the gap between the lower seal ring 77 on the valve core 72 and the first communication port G to the bottom end of the valve core 72, i.e. the first end 7111 of the valve cavity 711, and then push the valve core 72 to slide upward, i.e. reverse movement to the sealing position. When the first gap 79 between the exhaust communication port J and the first communication port G is opened, the main communication passage of the first gas cavity 12 communicated with the reversing valve 5 is blocked, causing the exhaust of the first gas cavity 12 to be blocked, the gas in the first gas cavity 12 can be sequentially discharged to the outside of the cylinder through the first communication passage 73, the first communication port G, the first gap 79 between the exhaust communication port J and the first communication port G, the exhaust communication port J, the auxiliary exhaust passage 75 and the auxiliary exhaust port K. Of course, when the main communication passage of the first gas cavity 12 communicated with the reversing valve 5 is blocked, causing the exhaust of the first gas cavity 12 not to be blocked, auxiliary exhaust can also be performed through the auxiliary exhaust passage.

[0070] As shown in Figure 10 , when the auxiliary exhaust valve corresponds to the intake of the cylinder cavity and the other cylinder cavity exhausts, the gas enters the first end 7111 of the valve cavity 711 from the first communication port G, and the gas at the second end 7112 of the valve cavity 711 is discharged from the second communication port H and the second communication passage 74. Under the action of the gas entering the first communication passage 73, the valve core can slide reversely, i.e. move upward, until the sealing state, so as to seal the first gap 79 between the exhaust communication port J and the first communication port G, and then cut off the auxiliary exhaust passage.

[0071] Specifically, as shown in Figure 3 and Figure 10 , when the second gas cavity 13 intakes and the first gas cavity 12 exhausts, the gas discharged from the gas source can be sequentially discharged through the first intake port P and the second working port B, and enter the Figure 10 second gas cavity 13 shown in the figure through the main communication passage of the cylinder cavity. The gas in the second gas cavity 13 can flow to the first end 7111 of the valve cavity 711 from the first communication passage 73 and the first communication port G, and can push the valve core 72 to move upward until the sealing state shown in Figure 10 , so that the lower seal ring 77 on the valve core 72 moves upward to the first gap 79 between the exhaust communication port J and the first communication port G along with the valve core 72, i.e. as shown in Figure 10The sealing ring 77 is arranged at the position shown, so that the sealing ring 77 is arranged on the section of the valve core 72 between the exhaust communication port J and the first communication port G, that is, the first gap 79 between the exhaust communication port J and the first communication port G is sealed, and the communication between the exhaust communication port J and the first communication port G is cut off, so that the communication between the first communication passage 73 and the auxiliary exhaust passage 75 is cut off, that is, the auxiliary exhaust passage 75 is blocked, and the second air cavity 13 is prevented from being exhausted by the auxiliary exhaust passage 75 when the second air cavity 13 is filled with air, that is, the unloading during air filling is avoided.

[0072] In the embodiment, the first working port A and the second working port B are respectively connected with the two air cavity bodies on the left and right sides of the cylinder piston 11 through the second communication passage 74 of the auxiliary exhaust valve 7 corresponding to the other air cavity body 11. Specifically, as shown in Figure 3 and Figure 8 shown, the second working port B is connected with the first air cavity 12 through the main communication passage on the left cylinder end cover, and a branch connected with the second communication passage 74 of the right auxiliary exhaust valve 7 is further connected to the passage through which the main communication passage and the second working port B are communicated, and the first working port A is connected with the second air cavity 13 through the main communication passage on the right cylinder end cover, and a branch connected with the second communication passage 74 of the left auxiliary exhaust valve 7 is further connected to the passage through which the main communication passage and the first working port A are communicated.

[0073] In the embodiment, the valve body 71 is provided with an opening limiting portion 712 for limiting and supporting the valve core 72 to be in an open state, and the valve body 71 is provided with a sealing limiting portion 713 for limiting and supporting the valve core 72 to be in a sealing state.

[0074] Continuing to refer to Figure 8 and Figure 10 , in an embodiment of the valve core in the embodiment, the valve core 72 is in a T-shaped structure, the valve body 71 is provided with an opening limiting portion 712 in a stepped structure for limiting and supporting the normal support wall (such as the bottom wall shown in Figure 8 ) of the larger radial dimension section 721 of the valve core 72 to limit the valve core 72 to the open state shown in Figure 8 , and the end (such as the top end shown in Figure 8 ) of the valve body 1 close to the larger radial dimension section 721 of the valve core 72 is an open end, which is provided with a limiting plug 78, and the bottom end of the limiting plug 78 is provided with a sealing limiting portion 713 for limiting and supporting the end (such as the top wall shown in Figure 8 ) of the larger radial dimension section 721 of the valve core 72 to limit the valve core 72 to the sealing state shown in Figure 10In the sealed state shown, a sealing ring 77 is provided on the smaller radial section 722 of the valve core 72 to seal the first gap 79 between the valve core 72 and the valve body 71, when the valve core 22 slides to... Figure 10 When the system is in the sealed state, the sealing ring 77 slides between the auxiliary exhaust passage 75 and the first connecting passage 73 to cut off the gap between them. Alternatively, multiple sealing rings can be provided on the smaller radial section 722; the lower sealing ring is used to cut off and open the auxiliary exhaust passage, while the upper sealing ring prevents gas in the auxiliary exhaust passage from continuing to flow upwards along the first gap 79. Sealing rings can also be provided on the larger radial section 721 to prevent communication between the upper and lower cavities of the larger radial section 721.

[0075] Specifically, the limiting plug 78 has a T-shaped structure, and the second connecting channel 74 is disposed on the limiting plug 78, penetrating through the limiting plug 78. On the valve body 71, the opening limiting part 712 is located near the opening end of the valve body 71 (e.g., Figure 8 A third connecting channel 76 is provided at the upper side (as shown), which communicates with the cavity between the opening limiting part 712 and the radially larger section 721. The third connecting channel 76 is also connected to the auxiliary exhaust channel 75, used to discharge the gas in the cavity between the opening limiting part 712 and the radially larger section 721 when the radially larger section 721 slides towards the opening limiting part 712. That is to say, the valve core 72 itself Figure 10 When the valve core 72 slides downwards in the sealed state, the gas in the cavity between the opening limit part 712 and the section with the larger radial dimension 721 can be discharged from the third connecting channel 76 into the auxiliary exhaust channel 75, and then discharged from the auxiliary exhaust channel 75 to the outside of the valve cavity 711. Of course, when the valve core 72... Figure 8 When the valve core 72 slides upward in the open position as shown, the gas in the cylinder cavity not only pushes the valve core 72 upward, but a small portion of the airflow can also flow from the first connecting channel 73 and the auxiliary exhaust channel 75 into the cavity between the opening limit part 712 and the radially larger section 721, preventing the formation of negative pressure. Of course, a sealing ring can also be provided on the outer periphery of the radially larger section 721 to ensure the sealing of the upper and lower sides of the valve core 72. A sealing ring can also be provided at the top of the valve stem 722, such as... Figure 8 As shown, when the valve core 72 is in the open state, the sealing ring can be located above the exhaust port J, sealing the gap between the valve stem 722 and the valve body 71 on its upper side, preventing gas in the first communication channel 73 from entering the position between the opening limit part 712 and the radially larger section 721; the end of the radially smaller section 722 of the valve core (such as...) Figure 8 A second gap 710 exists between the lower end shown and the first end 7111 end wall of the valve cavity; as shown Figure 10As shown, when the valve core 72 is in the sealing state, the sealing ring can be at the top end of the gap channel between the valve rod 722 and the valve body 71.

[0076] Continuing to refer to Figure 11 In another embodiment of the valve core in this embodiment, the valve core 72 is a character-shaped structure, and one end (such as the top end shown) of the valve body 1 is an open end, which is provided with a limiting plug 78. The bottom end of the limiting plug 78 is provided with a sealing limiting part 713 for limiting and supporting the wall surface (such as the top wall shown) of the valve core 72, so that the valve core 72 is limited to the sealing state. The bottom wall of the valve cavity 711 serves as an opening limiting part 712 for limiting and supporting one end (such as the top end shown) of the valve core 72, so that the valve core 72 is in the open state. The valve core 72 is provided with a sealing ring 77 for sealing the first gap 79 between the valve core 72 and the valve body 71. Figure 11 Figure 11 As shown, when the valve core 72 is in the sealing state, the sealing ring can be at the top end of the gap channel between the valve rod 722 and the valve body 71. Figure 11

[0077] Specifically, the valve core 72 is a character-shaped structure, and the principle of the valve core 72 being a T-shaped structure is similar, except that the limiting of downward sliding is limited by the bottom wall of the valve cavity 711. The two structures can be mutually referenced.

[0078] In summary, the gas cylinder for the pneumatic hydraulic station and the pneumatic hydraulic station provided in this embodiment are provided with auxiliary exhaust valves 7 on both cylinder end covers, and the two auxiliary exhaust valves 7 correspond to the two cylinder cavities of the cylinder 1, respectively. The auxiliary exhaust valve opens when the auxiliary exhaust valve corresponding cylinder cavity is exhausted and the other cylinder cavity is filled, so as to release the air pressure of the auxiliary exhaust valve corresponding cylinder cavity. When the auxiliary exhaust valve corresponding cylinder cavity is blocked, especially when the reversing valve is in the neutral state, the air pressure of the cylinder cavity is released through the auxiliary exhaust valve 7, so that the cylinder piston 11 of the cylinder 1 can continue to move towards the direction of the cylinder end cover on the side of the cylinder cavity under the action of the air pressure in the other cylinder cavity, thereby triggering the reversing trigger device to control the reversing of the reversing valve 5 until the corresponding exhaust port and intake port are communicated, thereby avoiding the phenomenon that the cylinder, the reversing valve, etc. are stuck, the workpiece is not clamped tightly due to the loss of pressure of the tooling, and the tool is hit, etc. At the same time, the auxiliary exhaust valve 7 also seals when the auxiliary exhaust valve 7 corresponding cylinder cavity is filled, avoiding the pressure relief of the intake cavity and ensuring the stability of the movement of the cylinder piston.

[0079] ​​It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0080] In addition, it should also be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A cylinder for a pneumatic hydraulic station, comprising a cylinder body, a cylinder piston slidable along an inner wall of the cylinder body and forming an air-tight seal with the inner wall of the cylinder body, cylinder end covers arranged at both ends of the cylinder body to seal the cylinder body; a reversing valve assembly connected to the cylinder for controlling the reversing movement of the cylinder piston; the cylinder piston divides the inner cavity of the cylinder into two cylinder cavities, which are sequentially communicated with compressed gas and the outside through the reversing valve assembly to push the cylinder piston to move reciprocally; the reversing valve assembly comprises a reversing trigger device capable of sending a signal that the cylinder piston has moved to a position, and a reversing valve capable of sequentially switching the intake and exhaust of the two cylinder cavities according to the signal of the reversing trigger device; characterized in that, auxiliary exhaust valves are arranged on the cylinder end covers at both ends of the cylinder body, and are used to open when the auxiliary exhaust valve corresponding cylinder cavity exhausts and the other cylinder cavity intakes, so as to unload the air pressure in the auxiliary exhaust valve corresponding cylinder cavity, and further enable the cylinder piston to move to the direction of the cylinder end cover of the cylinder cavity under the action of the air pressure in the other cylinder cavity, so as to trigger the reversing trigger device.

2. The air cylinder for a pneumatic hydraulic station according to claim 1, characterized in that, The auxiliary exhaust valve comprises a valve body and a valve core; wherein, a valve cavity is arranged on the valve body, and the valve core is arranged in the valve cavity in a slidable manner to slide to a sealing state and an open state; a first communication channel and a second communication channel are arranged on the valve body; two ends of the first communication channel are respectively communicated with a first end of the valve cavity and the auxiliary exhaust valve corresponding cylinder cavity, and the valve core is in the sealing state when the cylinder cavity intakes and the other cylinder cavity exhausts; one end of the second communication channel is communicated with a second end of the valve cavity, and the other end is communicated with the other cylinder cavity, and the valve core is in the open state when the other cylinder cavity intakes and the cylinder cavity exhausts.

3. The air cylinder for a pneumatic hydraulic station according to claim 2, characterized in that, An auxiliary exhaust channel is further arranged on the valve body, and the first communication channel is communicated with the auxiliary exhaust channel to exhaust when the valve core is in the open state.

4. The air cylinder for a pneumatic hydraulic station according to claim 3, characterised in that, A first gap is arranged between the valve core and the valve body, and the first communication channel and the auxiliary exhaust channel form an auxiliary exhaust passage through the first gap.

5. The cylinder for a pneumatic hydraulic station according to claim 4, characterized in that, a sealing ring is arranged on the valve core, and the sealing ring seals the first gap to cut off the auxiliary exhaust passage when the valve core is in the sealing state.

6. The air cylinder for a pneumatic hydraulic station according to claim 2, characterized in that, An open limiting part is arranged on the valve body to limit and support the valve core so that the valve core is in the open state; a sealing limiting part is arranged on the valve body to limit and support the valve core so that the valve core is in the sealing state.

7. The air cylinder for a pneumatic hydraulic station according to claim 6, characterized in that The valve core is in a T-shaped structure, and the open limiting part limits and supports a larger radial dimension section of the valve core.

8. The air cylinder for a pneumatic hydraulic station according to claim 7, characterized in that When the valve core is in the open state, an end of a smaller radial dimension section of the valve core and a first end wall of the valve cavity have a second gap.

9. Cylinder for a pneumatic-hydraulic station according to any one of claims 1 to 8, characterized in that, When the reversing valve is in the neutral state and the auxiliary exhaust valve is in the open state, the auxiliary exhaust valve corresponding cylinder cavity is in the intake state and the other cylinder cavity is in the exhaust state, the intake in the auxiliary exhaust valve corresponding cylinder cavity is exhausted, and the cylinder piston is moved to the cylinder head side of the cylinder cavity under the action of the gas pressure in the other cylinder cavity.

10. A pneumatic-hydraulic station, characterized by The cylinder is provided with the auxiliary exhaust valve according to any one of claims 1 to 9.

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