Reversing valve element, reversing valve with same and hydraulic station

Abstract

The utility model provides a reversing valve element, a reversing valve with the reversing valve element and a hydraulic station with the reversing valve element. The reversing valve element comprises a main air inlet section, a first exhaust section, a second exhaust section, a first working section and a second working section. An auxiliary exhaust valve element is arranged in the reversing valve element. When the first working section is communicated with the main air inlet section and the second working section is communicated with the second exhaust section, the auxiliary exhaust valve element is communicated with the second working section and the second exhaust section; when the second working section communicates with the main air inlet section and the first working section communicates with the first exhaust section, the auxiliary exhaust valve element communicates with the first working section and the first exhaust section. Through the arrangement of the auxiliary exhaust valve element in the reversing valve element, the second working section and the second exhaust section are switched to be communicated or the first working section and the first exhaust section are switched to be communicated, so that auxiliary exhaust is carried out on the first working section or the second working section, then auxiliary exhaust is carried out on two air cavities of an air cylinder, and a piston of the air cylinder is prevented from being clamped and stopped.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic station, specifically, a reversing valve spool and the reversing valve and hydraulic station with the spool are provided. 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 hydraulic drive of an actuator.

[0003] Referring to Figure 1 , it is a structure 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 reversing trigger device 5' and a second reversing trigger device 6', and at the same time, the cylinder 1' is communicated with a reversing valve 3', and the air source is connected with the first reversing trigger device 5', the second reversing trigger device 6' and the air inlet of the reversing valve 3' respectively; the A' air outlet of the reversing valve 3' is communicated with one side of the cylinder 1', and the B' air outlet of the reversing valve 3' is communicated with the other side of the cylinder 1'; the first reversing trigger device 5' and the reversing valve 3' are connected to control the reversing valve 3' to start the A' air outlet of the reversing valve 3' so as to make the A' air outlet of the reversing valve 3' communicated with the P' air inlet of the reversing valve 3'; the second reversing trigger device 6' and the reversing valve 3' are connected to control the reversing valve 3' to start the B' air outlet of the reversing valve 3' so as to make the B' air outlet of the reversing valve 3' communicated with the P' air inlet of the reversing valve 3'.

[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 reversing trigger device 5' is triggered to open, the reversing valve 3' is pushed to reverse, the compressed air enters the cylinder 1' from the A' air outlet, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to move to the right (the first reversing trigger device 5' is reset 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 reversing trigger device 6' is triggered to open, the reversing valve 3' is pushed to reverse, the compressed air enters the cylinder 1' from the B' air outlet, and enters the space on the right side of the pneumatic piston, thereby pushing the pneumatic piston to move to the left (the second reversing trigger device 6' is reset 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 the 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 in the factory use environment, the core shaft is moved by the end extrusion of the pneumatic piston, the reversing trigger device is triggered to make the reversing valve reverse, so that the cylinder piston reverses, and the oil cylinder is continuously supplied by 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, under the condition that the gas source pressure is low or fluctuates greatly, for example, other gas units (air gun, etc.) on the gas path cause the gas source pressure to be unstable, the supply gas pressure is low, the core shaft movement cannot reach 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 reversing valve spool and the reversing valve and hydraulic station with the valve core, to solve the problem of cylinder sticking in existing hydraulic station.

[0007] In one aspect, the utility model provides a kind of reversing valve spool, including the main air inlet section that can be communicated with the first air inlet of reversing valve valve body, the first exhaust section and the second exhaust section that can be communicated with the reversing exhaust port of reversing valve valve body, the first work section that can be communicated with the first work port of reversing valve valve body, the second work section that can be communicated with the second work port of reversing valve valve body;The auxiliary exhaust cavity is arranged in the reversing valve spool, and the auxiliary exhaust valve core is arranged in the auxiliary exhaust cavity;When the first work section is communicated with the main air inlet section and the second work section is communicated with the second exhaust section, the auxiliary exhaust valve core is communicated with the second work section and the second exhaust section;When the second work section is communicated with the main air inlet section and the first work section is communicated with the first exhaust section, the auxiliary exhaust valve core is communicated with the first work section and the first exhaust section.

[0008] Further, the reversing valve spool, the first work section and the first exhaust section are respectively provided with the first auxiliary air inlet and the first auxiliary exhaust port communicated with the auxiliary exhaust cavity;The second work section and the second exhaust section are respectively provided with the second auxiliary air inlet and the second auxiliary exhaust port communicated with the auxiliary exhaust cavity.

[0009] Further, the above-mentioned reversing valve spool, the auxiliary exhaust cavity comprises: sequentially arranged first auxiliary exhaust section, auxiliary exhaust reversing section and second auxiliary exhaust section; wherein the auxiliary exhaust valve spool is slidably arranged in the exhaust reversing section; the first auxiliary exhaust port is in communication with the first auxiliary exhaust section, and the second auxiliary exhaust port is in communication with the second auxiliary exhaust section; the first auxiliary intake port and the second auxiliary intake port are arranged on the cavity wall of the auxiliary exhaust reversing section; when the first working section is in communication with the main intake section and the second working section is in communication with the second exhaust section, the auxiliary exhaust valve spool slides to the second state in which the second auxiliary intake port is in communication with the second auxiliary exhaust port; when the second working section is in communication with the main intake section and the first working section is in communication with the first exhaust section, the auxiliary exhaust valve spool slides to the first state in which the first auxiliary intake port is in communication with the first auxiliary exhaust port.

[0010] Further, the above-mentioned reversing valve spool, the auxiliary exhaust valve spool comprises: a valve core body, a first switching rod and a second switching rod arranged on both sides of the valve core body respectively; wherein the valve core body is slidably arranged along the inner wall of the auxiliary exhaust reversing section and forms an airtight seal with the inner wall of the auxiliary exhaust reversing section; the first switching rod realizes the on-off switching between the first auxiliary intake port and the first auxiliary exhaust port under the driving of the valve core body; the second switching rod realizes the on-off switching between the second auxiliary intake port and the second auxiliary exhaust port under the driving of the valve core body.

[0011] Further, the above-mentioned reversing valve spool, the auxiliary exhaust reversing section and the first auxiliary exhaust section are further provided with a first switching cavity matched with the first switching rod, and the first auxiliary intake port is arranged on the cavity wall of the first switching cavity; the auxiliary exhaust reversing section and the second auxiliary exhaust section are further provided with a second switching cavity matched with the second switching rod, and the second auxiliary intake port is arranged on the cavity wall of the second switching cavity.

[0012] Further, the above-mentioned reversing valve spool, the radial dimension of the valve core body is greater than the radial dimension of the first switching rod and the second switching rod, and the two end faces thereof form an action surface on which the compressed gas coming from the first auxiliary intake port or the second auxiliary intake port acts to push the auxiliary exhaust valve spool to slide.

[0013] Further, the above-mentioned reversing valve spool, a first sealing ring is sleeved on the first switching rod, and the first sealing ring can slide with the first switching rod to realize the on-off switching between the first auxiliary intake port and the first auxiliary exhaust port; a second sealing ring is sleeved on the second switching rod, and the second sealing ring can slide with the second switching rod to realize the on-off switching between the second auxiliary intake port and the second auxiliary exhaust port.

[0014] Further, the above-mentioned reversing valve spool, when the reversing valve spool is in the neutral state to make the first working section intake and the second working section not exhaust, the auxiliary exhaust valve core communicates the first working section and the first exhaust section to realize the communication of the first working port and the reversing exhaust port; when the reversing valve spool is in the neutral state to make the second working section intake and the first working section not exhaust, the auxiliary exhaust valve core communicates the second working section and the second exhaust section to realize the communication of the second working port and the reversing exhaust port.

[0015] In another aspect, the utility model still provides a reversing valve, has above-mentioned reversing valve spool.

[0016] In still another aspect, the utility model still provides an energy-saving hydraulic station, has reversing valve.

[0017] The reversing valve spool, the reversing valve and the energy-saving hydraulic station provided by the utility model can switch under different states of the reversing valve spool, when the first working section and the main intake section are communicated and the second working section and the second exhaust section are communicated, the auxiliary exhaust valve core communicates the second working section and the second exhaust section, auxiliary exhaust is carried out on the second working section, namely auxiliary exhaust is carried out on the second air cavity, and then the cylinder piston moves to the side where the second air cavity is under the action of the air pressure in the first air cavity, so as to trigger the second reversing trigger device, and then the reversing valve is reversed to the position where the second working section and the main intake section are communicated and the first working section and the first exhaust section are communicated, especially when the air source pressure drops or fluctuates greatly, the reversing valve can be switched to the state where the second working section and the main intake section are communicated and the first working section and the first exhaust section are communicated, namely the state where the second air cavity intakes and the first air cavity exhausts, so that the cylinder does not stop, that is, the cylinder piston does not stop moving, so that the hydraulic pressure is not outputted, the tool loses pressure, the workpiece is not clamped tightly, and the tool is not hit, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a structural schematic diagram of a hydraulic station provided in the prior art;

[0020] Figure 2 A schematic diagram of the structure of a directional valve in a stuck state as provided in the prior art;

[0021] Figure 3 A schematic diagram of the structure of the hydraulic station provided in the embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the reversing valve provided in an embodiment of the present utility model;

[0023] Figure 5 Another structural schematic diagram of the hydraulic station provided in this embodiment of the utility model;

[0024] Figure 6 Another structural schematic diagram of the reversing valve provided in this embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of a double-sided pneumatically controlled directional valve where the directional valve core moves to the left end, provided in an embodiment of the present utility model, wherein the auxiliary exhaust valve core is in the first state;

[0026] Figure 8 This is a schematic diagram of the structure between the directional valve core and the auxiliary exhaust valve core provided in an embodiment of the present utility model, wherein the auxiliary exhaust valve core is in a first state;

[0027] Figure 9 for Figure 8 A magnified view of a section at point M;

[0028] Figure 10 for Figure 8 A magnified view of a portion of point N in the middle;

[0029] Figure 11 A schematic diagram of the structure of the dual-sided pneumatically controlled directional valve provided in this embodiment of the utility model, showing the directional valve core moving to the right to the position where the first working port air inlet is just opened and the second working port exhaust is closed.

[0030] Figure 12 for Figure 11 A magnified view of a portion of point O in the middle;

[0031] Figure 13 forFigure 11 Enlarged view of the middle Q;

[0032] Figure 14 For Figure 11 Enlarged view of the middle T;

[0033] Figure 15 Structure schematic diagram of the reversing valve spool moving to the right end in the double-sided air control type reversing valve provided by the embodiment of the present application, wherein the auxiliary exhaust valve spool is in the second state;

[0034] Figure 16 Structure schematic diagram between the reversing valve spool and the auxiliary exhaust valve spool provided by the embodiment of the present application, wherein the auxiliary exhaust valve spool is in the second state;

[0035] Figure 17 Structure schematic diagram of the reversing valve spool moving to the left end in the double-sided air control type reversing valve provided by the embodiment of the present application, wherein the auxiliary exhaust valve spool is in the second state;

[0036] Figure 18 For Figure 17 Enlarged view of the middle U;

[0037] Figure 19 For Figure 17 Enlarged view of the middle V;

[0038] Explanation of reference signs: 1-cylinder, 11-cylinder piston, 12-first air cavity, 13-second air cavity, 2-oil cylinder, 21-oil cylinder piston, 3-reversing valve, P-first air inlet, A-first working port, B-second working port, R1-first reversing exhaust port, R2-second reversing exhaust port, Y1-first control port, Y2-second control port, Z-third control port, 31-reversing valve body, 311-reversing switching cavity, 32-reversing valve spool, 321-assisted exhaust cavity, 3211-first assisted exhaust section, 3212-assisted exhaust reversing section, 3213-second assisted exhaust section, 3214-first switching cavity, 3215-first gap, 3216-second switching cavity, 3217-second gap, 322-first limit portion, 323-second limit portion, 324-first exhaust section, 325-first working section, 326-main air inlet section, 327-second working section, 328-second exhaust section, G-first assisted air inlet, H-second assisted air inlet, S1-first assisted exhaust port, S2-second assisted exhaust port, 33-assisted exhaust valve spool, 331-spool body, 332-first switching rod, 333-second switching rod, 34-first sealing ring, 35-second sealing ring, 36-third sealing ring, 4-linkage rod, 5-first reversing trigger device, E-second air inlet, C-third exhaust port, 6-second reversing trigger device, F-third air inlet, D-fourth exhaust port, 7-return spring. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. While 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 disclosure and the features in the embodiments can be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0040] As is well known in the art, in order to avoid the simultaneous exhaust of the cavities on both sides of the cylinder, the reversing valve 3' has the characteristic of early intake and late 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 later.

[0041] As Figure 2As shown, when the push reversing spool moves to the right, that is, A' port switches from intake air to exhaust air, and B' port switches from exhaust air to intake air, when moving to A' port intake air is closed, and exhaust air is not opened, B' port exhaust air is closed, and intake air is just opened, that is, B' port just intakes air, while A' port intake and exhaust are both closed, due to the pressure of the air chamber connected with A' port is larger, and the air chamber connected with B' port intakes air from B' port, so that both ends of the cylinder have pressure, and the pilot valve corresponding to the air chamber connected with B' port is reset and closed, or the gas source pressure becomes smaller, so that the air pressure for pushing the reversing spool to move to the right becomes smaller, resulting in that the reversing valve is stuck. The stuck reversing valve causes the cylinder piston to stop moving, so that no hydraulic pressure is output, and the workpiece is not clamped tightly, and the tool is hit, etc.

[0042] Referring to Figure 3 and Figure 5 , which respectively show two structure schematic diagrams of the hydraulic station provided by the embodiment of the utility model. As shown in the figure, the hydraulic station comprises: a cylinder 1, an oil cylinder 2, a reversing trigger device and a reversing valve 3; wherein,

[0043] The oil cylinder piston of the oil cylinder 2 and the cylinder piston 11 of the cylinder 1 are connected through a linkage rod 4, the linkage rod 4 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 which is arranged near the oil cylinder 2, so that the oil cylinder piston slides synchronously with the cylinder piston 11, so as to control the clamping and loosening of the clamping tool of the machine tool by oil inlet and outlet.

[0044] Specifically, the cylinder 1 is provided with a through hole, and the cylinder 1 and the oil cylinder 2 are connected through the through hole. The cylinder 1 is provided with a 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 cylinder piston 11 and the oil cylinder piston 21 are connected through the linkage rod 4, and the linkage rod 4 passes through the through hole, in the embodiment, the two ends of the linkage rod 4 are respectively fixedly connected with the cylinder piston 11 and the oil cylinder piston 21, so as to realize the linkage between the cylinder 1 and the oil cylinder 2. In the 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 the embodiment. In the embodiment, the piston area of the cylinder piston 11 is larger than the piston area of the oil cylinder piston, and in the embodiment, the piston area of the cylinder piston 11 can be more than six times 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 cylinder piston 11 is six times the piston area of the oil cylinder piston 21, then the cylinder 1 outputs 1 bar pressure, and the oil cylinder 2 outputs 6 bar pressure.

[0045] The cylinder 1 is provided with a reversing trigger device for sensing whether the cylinder piston 11 of the cylinder 1 moves to the position and sending a signal that the cylinder piston 11 moves to the position. The reversing valve 3 reverses based on the signal of the reversing trigger device,

[0046] Specifically, the reversing trigger devices can be two, namely a first reversing trigger device 5 and a second reversing trigger device 6, which are respectively arranged at the two ends of the cylinder 1 to respectively acquire whether the cylinder piston 11 moves to the position at the two ends, and are capable of sending corresponding position-to-move signals when the cylinder piston 11 moves to the position at the two ends. The reversing valve 3 is connected with the reversing trigger devices, and switches the air intake and air exhaust of the first air chamber 12 and the second air chamber 13 of the cylinder 1 in turn according to the position-to-move signals sent by the first reversing trigger device 5 or the second reversing trigger device 6. In the embodiment, the reversing trigger device can be a pneumatic mechanical valve, and a pneumatic control signal is used as the position-to-move signal to control the reversing valve 3 to switch; or the reversing trigger device can be another valve such as an electromagnetic valve, and when the cylinder piston 11 moves to the position, an electric signal can be sent to the reversing valve 3, and the reversing valve 3 switches based on the electric signal to switch the air intake and air exhaust of the first air chamber 12 and the second air chamber 13. In the embodiment, the pneumatic mechanical valve is taken as an example for description, and the electromagnetic valve can be referred to the pneumatic mechanical valve.

[0047] The reversing valve 3 comprises a first air inlet P, a reversing air outlet, a first working port A and a second working port B which are respectively connected with the first air chamber 12 and the second air chamber 13 at the two sides of the cylinder 1, and the reversing valve 3 switches to switch the connection between the first working port A and the first air inlet P and the connection between the second working port B and the first air inlet P, and then switches the air intake and air exhaust of the first air chamber 12 and the second air chamber 13 in turn.

[0048] Specifically, the reversing air outlet can be two, namely a first reversing air outlet R1 and a second reversing air outlet R2, which are respectively corresponding to the first working port A and the second working port B, and the corresponding first working port A and the first reversing air outlet R1 are arranged on the same side of the first air inlet P, and the second working port B and the second reversing air outlet R2 are arranged on the other side of the first air inlet P, so as to facilitate the connection between the corresponding air outlet and the reversing air outlet. When the reversing valve 3 switches to one of the air intake and air exhaust positions, the first working port A is connected with the first air inlet P, and the second working port B is connected with the second reversing air outlet R2. When the reversing valve 3 switches to the other air intake and air exhaust position, the second working port B is connected with the first air inlet P, and the first working port A is connected with the first reversing air outlet R1. Of course, the reversing air outlet can also be one, which is not limited in the embodiment.

[0049] In one embodiment of the reversing valve in the embodiment, as shown in Figure 3 and Figure 4 , the reversing valve 3 can be a double-side pneumatic control type reversing valve, that is, the two ends (such as the left and right ends as shown in Figure 4 ) of the reversing valve body 31 of the reversing valve 3 are provided with a first control port Y1 and a second control port Y2, and the first reversing trigger device 5 and the second reversing trigger device 6 are both pneumatic control valves, which are respectively arranged at the two ends of the cylinder 1 (such as the left and right ends as shown in Figure 3(As shown at the left and right ends), the first reversing trigger device 5 and the second reversing trigger device 6 are respectively activated by the cylinder piston 11; the first air inlet P, the second air inlet E of the first reversing trigger device 5, and the third air inlet F of the second reversing trigger device 6 are respectively connected to the air source; the third exhaust port C of the first reversing trigger device 5 is connected to the first control port Y1, and the fourth exhaust port D of the second reversing trigger device 6 is connected to the second control port Y2, which is used to connect the second air inlet E and the first control port Y1 after the first reversing trigger device 5 is activated, so as to push the reversing valve core 32 of the reversing valve 3 to slide to the first The working port A is connected to the first air inlet P and the second working port B is connected to the reversing exhaust port. That is, the reversing valve 3 is connected to the first working port A and the first air inlet P, and the second working port B and the second reversing exhaust port R2. After the second reversing trigger device 6 is triggered and opened, the third air inlet F and the second control port Y2 are connected to push the reversing valve core 32 to slide to the position where the second working port B is connected to the first air inlet P and the first working port A is connected to the reversing exhaust port. That is, the reversing valve 3 is connected to the second working port B and the first air inlet P, and the first working port A and the first reversing exhaust port R1.

[0050] Specifically, the first reversing trigger device 5 is located at one end of the cylinder 1 (e.g., Figure 3 (As shown on the left end), the second reversing trigger device 6 is located at the other end of cylinder 1 (e.g., the left end), Figure 3 (As shown on the right end), and the first reversing trigger device 5 and the second reversing trigger device 6 are both partially protruding into the first air chamber 12 and the second air chamber 13 on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left and right into position, the first reversing trigger device 5 and the second reversing trigger device 6 can be activated respectively. In this embodiment, the first reversing trigger device 5, i.e., the pneumatic control valve body, is provided with a slidable pneumatic control valve core. The pneumatic control valve body is provided with a third air outlet C and a second air inlet E. The sliding of the pneumatic control valve core can make the pneumatic control valve core slide to the corresponding position connecting the third air outlet C and the second air inlet E. A starting block is provided on one side of the pneumatic control valve core, and the starting block is connected to the pneumatic control valve core to slide synchronously relative to the pneumatic control valve body, thereby realizing the connection and disconnection of the third air outlet C and the second air inlet E. The second air inlet E is connected to the air source, and the third air outlet C is connected to the first control port Y1. The starting block is partially protruding outside the pneumatic control valve body, such as Figure 3 As shown, when the cylinder piston 11 slides to the left end under air pressure, it can trigger the starting block to activate the first reversing trigger device 5. This causes the starting block and the pneumatic control valve core to slide to the left until the third air outlet C and the second air inlet E are connected, thereby connecting the air source and the first control port Y1. This allows pressure to be applied to the control chamber corresponding to the first control port Y1, causing the reversing valve 3 to slide and reverse, i.e., pushing the valve core of the reversing valve 3 to move to the right and switch to the position shown.Figure 3 The first working port A is communicated with the first inlet port P at the position shown, i.e. the control reversing valve 3 is communicated with the first working port A and the first inlet port P, so that the cylinder piston 11 can slide to the right.

[0051] In the embodiment, the trigger end of the first reversing trigger device 5 and the second reversing trigger device 6 is provided with a position core shaft, which is arranged on the cylinder body of the cylinder 1 in a slidable manner along the movement direction of the cylinder piston 11, and is used to push the corresponding position core shaft to slide with the cylinder piston 11 when the cylinder piston 11 slides to the end point position, so as to push the valve core of the first reversing trigger device 5 or the second reversing trigger device 6 to move synchronously, and realize the trigger opening of the first reversing trigger device 5 or the second reversing trigger device 6.

[0052] Specifically, the valve body of the cylinder 1 is provided with a mounting hole on each of the two side plates corresponding to the two sides of the cylinder piston 11, i.e. the cylinder end cover, and each mounting hole is sealingly and slidably connected with a position core shaft, i.e. the position core shaft is arranged on the cylinder end cover of the cylinder 1 in a slidable manner and can seal the mounting hole. The end portion of the position core shaft outside the cylinder 1 is connected with the first reversing trigger device 5 or the second reversing trigger device 6 to drive the corresponding valve core to move. When the cylinder piston 11 slides to the left to approach the left end point position, the left side wall of the cylinder piston 11 is in abutting contact with the right end of the left side position core shaft arranged in the first cavity 12, so as to push the left side position core shaft to slide to the left synchronously with the cylinder piston 11 until the cylinder piston 11 slides to the right end point position. In the sliding process of the left side position core shaft, the valve core of the first reversing trigger device 5 is pushed to move to the left synchronously. When the cylinder piston 11 slides to the left end point position, the valve core of the first reversing trigger device 5 moves to the position of the third outlet port C and the second inlet port E, so as to realize the trigger opening of the first reversing trigger device 5, and further make the reversing valve 3 switch to the position where the first working port A is communicated with the first inlet port P, so that the cylinder piston 11 can slide to the right. When the cylinder piston 11 slides to the right, the valve core of the first reversing trigger device 5 can be reset under the action of the cylinder control valve core reset spring, and the left side position core shaft is pushed to slide to the right synchronously, so as to realize the reset of the first reversing trigger device 5 and the left side position core shaft.

[0053] In the embodiment, the movement of the right side position core shaft and the working process of the second reversing trigger device 6 can refer to the movement of the left side position core shaft and the trigger opening working process of the first reversing trigger device 5, which will not be described herein.

[0054] In the embodiment, the structure of the second reversing trigger device 6 is similar to that of the first reversing trigger device 5, that is, the fourth gas outlet D of the second reversing trigger device 6 is connected to the third gas inlet F, and is respectively connected to the second control port Y1 and the gas source. When the cylinder piston 11 slides to the right end under the action of the gas pressure, the cylinder piston 11 can trigger and start the second reversing trigger device 6, so that the fourth gas outlet D is connected to the third gas inlet F, and the connection between the second control port Y1 and the gas source is realized, thereby pressurizing the control cavity corresponding to the second control port Y1, so that the reversing valve 3 slides and reverses, that is, moves to the left, and switches to the position where the second control port B is connected to the first gas inlet P, that is, controls the reversing valve 3 to connect the second control port B and the first gas inlet P, and then makes the cylinder piston 11 slide to the left. The specific structure and working principle of the second reversing trigger device 6 can be referred to the first reversing trigger device 5, and the second reversing trigger device 6 will not be described here in this embodiment.

[0055] In the embodiment, the gas inlets of the first control port Y1 and the second control port Y2 are respectively used as the movement-to-position signals of the two ends of the cylinder piston.

[0056] In another embodiment of the reversing valve in the embodiment, as shown in Figure 5 and Figure 6 , the reversing valve 3 can be a spring return type gas control reversing valve, that is, one end (for example, the left end as shown in Figure 6 ) of the reversing valve body 31 is provided with a third control port Z, and the other end of the reversing valve body 31 is provided with a return spring 7; the first reversing trigger device 5 and the second reversing trigger device 6 are both gas control valves, and are respectively arranged at the two ends (for example, the left and right ends as shown in Figure 3 ) of the cylinder 1, and are respectively triggered and opened by the cylinder piston 11; the first gas inlet P and the second gas inlet E of the first reversing trigger device 5 are respectively connected to the gas source; the third gas outlet C of the first reversing trigger device 5 and the third gas inlet F of the second reversing trigger device 6 are respectively connected to the third control port Z, and the fourth gas outlet D of the second reversing trigger device 6 is connected to the outside, which is used to connect the second gas inlet E and the third control port Z after the first reversing trigger device 5 is triggered and opened, so as to push the reversing valve spool to slide to the position where the first control port A is connected to the first gas inlet P and the second control port B is connected to the reversing gas outlet, that is, control the reversing valve 3 to connect the first control port A and the first gas inlet P, and connect the second control port B and the second reversing gas outlet R2, and connect the third control port Z and the fourth gas outlet D after the second reversing trigger device 6 is triggered and opened, so that the reversing valve spool is returned to the position under the action of the return spring, that is, the position where the second control port B is connected to the first gas inlet P and the first control port A is connected to the reversing gas outlet, that is, control the reversing valve 3 to connect the second control port B and the first gas inlet P, and connect the first control port A and the first reversing gas outlet R1.

[0057] Specifically, the directional valve body 31 contains a directional valve core 32 that can slide along its length. The third control port Z is located on one side of the directional valve core 32 (e.g., Figure 6 The left side shown is connected, and the return spring 7 is located on the other side of the directional valve core 32 (as shown on the left). Figure 6 The right side shown) and the right end of the reversing valve body 31 are connected. When air enters through the third control port Z, the reversing valve core 32 can move towards the return spring 7 under the action of the air pressure on the left side (as shown on the right side). Figure 6 (As shown, moving to the right), after unloading at the third control port Z, the directional valve core 32 can move towards the third control port Z side under the action of the return spring 7 (as shown). Figure 6 (as shown, moving to the left), thereby achieving a switch between two positions. The first reversing trigger device 5 is located at one end of the cylinder 1 (e.g., moving to the left). Figure 5 (As shown on the left end), the second reversing trigger device 6 is located at the other end of cylinder 1 (e.g., the left end), Figure 5 (as shown on the right end), and the first reversing trigger device 5 and the second reversing trigger device 6 are both partially protruding into the first air chamber 12 and the second air chamber 13 on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left and right into position, the first reversing trigger device 5 and the second reversing trigger device 6 can be activated respectively.

[0058] In this embodiment, the specific structures of the first commutation triggering device 5 and the second commutation triggering device 6 can be referred to in the previous embodiment, and will not be described again in this embodiment.

[0059] In this embodiment, the air intake and exhaust of the third control port Z are used as positioning signals for the piston at both ends of the cylinder to move into position.

[0060] Of course, in other embodiments, the reversing valve 3 can also be an electromagnetically controlled reversing valve, that is, the two ends of the reversing valve are equipped with electromagnets, so as to use the attraction force of the electromagnets to push the valve core to change the working position of the valve.

[0061] In this embodiment, the structures of the spring-reset pneumatic directional valve and the dual-sided pneumatic directional valve can be referenced from each other. In this embodiment, the structure of the dual-sided pneumatic directional valve will be used as an example for detailed explanation.

[0062] See Figures 7 to 10 The figure shows a schematic diagram of the structure of the dual-sided pneumatically controlled directional valve provided in this embodiment of the present invention. As shown in the figure, the dual-sided pneumatically controlled directional valve is a combined directional valve, which includes: a directional valve body 31 and a directional valve core 32.

[0063] A first air inlet P, a reversing exhaust port, a first working port A, and a second working port B are disposed on the reversing valve body 31. The first working port A and the second working port B are respectively connected to the first air chamber 12 and the second air chamber 13. The reversing valve core 32 can slide within the reversing valve body 31 to achieve reversing. The reversing valve core 32 slides within the reversing valve body 31 based on signals from the first reversing trigger device 5 and the second reversing trigger device 6 to achieve reversing, thereby switching the air intake and exhaust of the first air chamber 12 and the second air chamber 13. The reversing valve core 32 includes: a main air intake section 326 that can communicate with the first air inlet P of the reversing valve 3; a first exhaust section 324 and a second exhaust section 328 that can communicate with the reversing exhaust port of the reversing valve 3; a first working section 325 that can communicate with the first working port A of the reversing valve 3; and a second working section 327 that can communicate with the second working port B of the reversing valve 3.

[0064] Specifically, the first air inlet P, the first working port A, the second working port B, the first reversing exhaust port R1, and the second reversing exhaust port R2 are all located on the reversing valve body 31. The first air inlet P can be located at the middle position in the axial direction of the reversing valve body 31, and the corresponding first working port A and first reversing exhaust port R1 are located on the same side of the first air inlet P (e.g., ...). Figure 7 (As shown on the left), the second working port B and the second reversing exhaust port R2 are located on the other side of the first intake port P (as shown on the left). Figure 7 (As shown on the right). The interior of the directional valve body 31 has a section extending along its length (e.g., on the right side). Figure 7 The reversing switching chamber 311 is arranged in the horizontal direction shown, and the reversing valve core 32 is arranged along the length direction of the reversing switching chamber 311 (e.g., horizontal direction shown). Figure 7 The directional valve core 32 (shown horizontally) is slidably disposed within the reversing switching chamber 311. Along its axial direction from left to right, the outer wall of the reversing valve core 32 is provided with a first exhaust section 324, a first working section 325, a main intake section 326, a second working section 327, and a second exhaust section 328. Regardless of the position to which the reversing valve core 32 slides, the first exhaust section 324 remains connected to the first reversing exhaust port R1, the first working section 325 remains connected to the first working port A, the main intake section 326 remains connected to the first intake port P, the second working section 327 remains connected to the second working port B, and the second exhaust section 328 remains connected to the second reversing exhaust port R2. Of course, when there is only one reversing exhaust port, the first exhaust section 324 and the second exhaust section 328 remain connected to the reversing exhaust port respectively. This embodiment uses two reversing exhaust ports as an example. The reversing valve core 32 slides to the left to... Figure 7When shown at the left end, the first exhaust section 324 and the first working section 325 are connected to achieve the connection between the first working port A and the first reversing exhaust port R1, and the main intake section 326 and the second working section 327 are connected to achieve the connection between the first intake port P and the second working port B, so that the first air chamber 12 exhausts air and the second air chamber 13 intakes air, allowing the cylinder piston 11 to move to the left (relative to the left). Figure 3 (As shown in the position); the directional valve core 32 slides to the right as... Figure 15 The right end shown connects the second working section 327 and the second exhaust section 328 to connect the second working port B with the second reversing exhaust port R2, and connects the first working section 325 and the main intake section 326 to connect the first intake port P with the first working port A, so that the second air chamber 13 exhausts air and the first air chamber 12 intakes air, allowing the cylinder piston 11 to move to the right (relative to the right). Figure 3 (Regarding the location shown).

[0065] The reversing valve core 32 has an auxiliary exhaust chamber 321 inside, and an auxiliary exhaust valve core 33 is installed inside the auxiliary exhaust chamber 321; in such cases... Figure 15 When the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 is connected to the second working section 327 and the second exhaust section 328; in the case of Figure 7 When the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, the auxiliary exhaust valve core 33 is connected to the first working section 325 and the first exhaust section 324.

[0066] Specifically, in such Figure 15 When the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, that is, when the reversing valve core 32 slides to the position where the first working port A is connected to the first intake port P and the second working port B is connected to the reversing exhaust port, the auxiliary exhaust valve core 33 connects the second working section 327 and the second exhaust section 328, that is, connects the second working port B to the reversing exhaust port, so as to help the reversing exhaust port release the air pressure in the second air chamber 13, thereby causing the cylinder piston 11 to move towards the side where the second air chamber 13 is located under the action of the air pressure in the first air chamber 11, so as to ensure that the cylinder piston 11 can move into place and trigger the second reversing trigger device 6, so as to control the reversing valve core 32 to slide to the left to reverse to the position where the reversing valve core 327 is connected to the second exhaust section 328. Figure 7 The position shown, where the second working port B connects to the first air inlet P and the first working port A connects to the reversing exhaust port, can prevent the cylinder piston 11 and the reversing valve core 32 from jamming; and in the following... Figure 7When the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, that is, when the reversing valve core 32 slides to the position where the second working port B is connected to the first intake port P and the first working port A is connected to the reversing exhaust port, the first working section 325 and the first exhaust section 324 are connected, that is, the first working port A and the reversing exhaust port, so as to assist the reversing exhaust port in releasing the air pressure in the first air chamber 12, thereby causing the cylinder piston 11 to move towards the side where the first air chamber 12 is located under the action of the air pressure in the second air chamber 13, so as to ensure that the cylinder piston 11 can move into place and trigger the first reversing trigger device 5, so as to control the reversing valve core 32 to slide to the right to reverse to the position where the first working port A is connected to the first intake port P and the second working port B is connected to the reversing exhaust port, which can prevent the cylinder piston 11 and the reversing valve core 32 from getting stuck.

[0067] In this embodiment, from the moment the reversing valve core 32 is switched to the position where the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 can quickly switch to the position. Figure 15 The second state shown connects the second working section 327 and the second exhaust section 328; that is, from the time the reversing valve core 32 is switched to its position until the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, until the time the reversing valve core 32 is switched to its position until the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, the auxiliary exhaust valve core 33 is in the second state. In particular, when the reversing valve core 32 is in the neutral position, allowing air to enter the second working section 327 and not exhaust from the first working section 325, i.e. Figure 17 and Figure 19 The second working section 327 shown is just connected to the main intake section 326, and as... Figure 17 and Figure 18 When the first working section 325 and the first exhaust section 324 are not open, the auxiliary exhaust valve core 33 is in the second state. The auxiliary exhaust valve core 33 connects the second working section 327 and the second exhaust section 328 to realize the connection between the second working port B and the reversing exhaust port, that is, to realize the connection between the second working port B and the second reversing exhaust port R2.

[0068] From the moment the reversing valve core 32 is switched into position until the second working section 327 connects to the main intake section 326 and the first working section 325 connects to the first exhaust section 324, until the moment the reversing valve core 32 is switched into position until the first working section 325 connects to the main intake section 326 and the second working section 327 connects to the second exhaust section 328, the auxiliary exhaust valve core 33 can perform rapid reversing, switching to... Figure 7The first state of the first working section 325 and the first exhaust section 324 is shown; that is, from the moment when the reversing valve spool 32 is reversed to the position where the second working section 327 is communicated with the main intake section 326 and the first working section 325 is communicated with the first exhaust section 324, the auxiliary exhaust spool 33 is in the first state. In particular, when the reversing valve spool 32 is in the neutral state to make the first working section 325 intake and the second working section 327 not exhaust, that is, as shown in Figure 11 and Figure 12 The first working section 325 is just communicated with the main intake section 326, and as shown in Figure 11 and Figure 14 The second working section 327 is not opened between the second exhaust section 328, the auxiliary exhaust spool 33 is in the first working state, and the auxiliary exhaust spool 33 communicates the first working section 325 and the first exhaust section 324 to realize the communication of the first working port A and the reversing exhaust port, that is, the communication of the first working port A and the first reversing exhaust port R1.

[0069] Further, when the first working section 325 is communicated with the main intake section 326 and the second working section 327 is communicated with the second exhaust section 328 as shown in Figure 15 , the auxiliary exhaust spool 33 can communicate the second working section 327 and the second exhaust section 328 through the second auxiliary exhaust passage; when the second working section 327 is communicated with the main intake section 326 and the first working section 325 is communicated with the first exhaust section 324 as shown in Figure 7 , the auxiliary exhaust spool 33 can communicate the first working section 325 and the first exhaust section 324 through the first auxiliary exhaust passage; in this embodiment, in order to simplify the structure of the auxiliary exhaust spool 33, the reversing exhaust port is two, the first exhaust section 324 is communicated with the first reversing exhaust port R1, and the second exhaust section 328 is communicated with the second reversing exhaust port R2. At the same time, when the second auxiliary exhaust passage communicates the second working section 327 and the second exhaust section 328, the first auxiliary exhaust passage is in a sealed state, cutting off the passage of the first working port A and the first reversing exhaust port R1 on the auxiliary exhaust spool 33, and when the first auxiliary exhaust passage communicates the first working section 325 and the first exhaust section 324, the second auxiliary exhaust passage is in a sealed state, cutting off the passage of the second working port B and the second reversing exhaust port R2 on the auxiliary exhaust spool 33.

[0070] When the first working section 325 is communicated with the main intake section 326 and the second working section 327 is communicated with the second exhaust section 328 as shown in Figure 15When the reversing valve core 32 shown slides to the position where the first working port A is connected to the first intake port P and the second working port B is connected to the second reversing exhaust port R2, and simultaneously before the reversing valve core 32 slides back to its original position, from the time the reversing valve core 32 is in position until the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, until the time the reversing valve core 32 is in position until the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, the second auxiliary exhaust passage connects the second working port B and the second reversing exhaust port R2. This can be achieved during the movement of the cylinder piston 11 towards the side where the second air chamber 13 is located (e.g. Figure 3 (As shown, moving to the right), the second auxiliary exhaust passage connects the second working port B and the reversing exhaust port, which can assist in the exhaust of the second air chamber 13. Not only can it ensure that the cylinder piston 11 can reliably move towards the side where the second air chamber 13 is located when the air source pressure is insufficient and the cylinder piston 11 is stuck, but it can also assist in the exhaust of the second air chamber 13 when the reversing valve core 32 is not in the correct position, causing the second working port B to just connect with the first air inlet P and the first working port A to not connect with the reversing exhaust port, i.e., as shown... Figure 17 and Figure 19 The second working section 327 shown is just connected to the main intake section 326, and as... Figure 17 and Figure 18 When the first working section 325 and the first exhaust section 324 are not open, the intake air in the second air chamber 13 is discharged through the second auxiliary exhaust passage to avoid the cylinder piston 11 from getting stuck. That is, before the reversing valve core 32 is not in the reversing position, it ensures that the cylinder piston 11 can continue to move to the side where the second air chamber 13 is located, thereby continuously triggering the second reversing trigger device 6, so as to ensure that the reversing valve core 32 can be reversing in place and avoid the reversing valve core 32 and the cylinder piston 11 from getting stuck.

[0071] In such Figure 7 When the reversing valve core 32 shown slides to the position where the second working port B is connected to the first intake port P and the first working port A is connected to the first reversing exhaust port R1, and simultaneously before the reversing valve core 32 slides back to its original position, that is, from the time the reversing valve core 32 is in position until the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, until the time the reversing valve core 32 is in position until the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the first working port A and the first reversing exhaust port R1 are connected through the first auxiliary exhaust passage. This can be achieved during the movement of the cylinder piston 11 towards the side where the first air chamber 12 is located (e.g. Figure 3The first auxiliary exhaust passage can assist the exhaust of the first gas cavity 12, especially when the reversing valve spool 32 fails to reverse to the position, 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 second reversing exhaust port R2, that is, as shown in Figure 11 and Figure 12 The first working section 325 is just communicated with the main intake section 326, and the second working section 327 is not opened between the second exhaust section 328, as shown in Figure 11 and Figure 14 The first working section 325 is just communicated with the main intake section 326, and the second working section 327 is not opened between the second exhaust section 328, as shown in

[0072] Continuing to refer to Figures 7 to 10 The first working section 325 and the first exhaust section 324 are respectively provided with a first auxiliary intake port G and a first auxiliary exhaust port S1 communicated with the auxiliary exhaust cavity 321; the second working section 327 and the second exhaust section 328 are provided with a second auxiliary intake port H and a second auxiliary exhaust port S2 communicated with the auxiliary exhaust cavity 321.

[0073] Specifically, the first auxiliary intake port G and the second auxiliary intake port H can be respectively communicated with the first working section 325 and the second working section 327 to be respectively communicated with the first working port A and the second working port B; the first auxiliary exhaust port S1 and the second auxiliary exhaust port S2 are respectively arranged at two ends of the reversing valve spool 32 and are respectively communicated with the first exhaust section 324 and the second exhaust section 328 to be respectively communicated with the first reversing exhaust port R1 and the second reversing exhaust port R2; in this embodiment, the first auxiliary exhaust port S1 is communicated with the first exhaust section 324, and the second auxiliary exhaust port S2 is communicated with the second exhaust section 328, that is, at any position of the reversing valve spool 32 in the sliding stroke, the first auxiliary exhaust port S1 is communicated with the first reversing exhaust port R1, and the second auxiliary exhaust port S2 is communicated with the second reversing exhaust port R2.

[0074] Continuing to refer to Figures 8 to 10, the auxiliary exhaust cavity 321: comprising a first auxiliary exhaust section 3211, an auxiliary exhaust reversing section 3212 and a second auxiliary exhaust section 3213 arranged in sequence; wherein the auxiliary exhaust valve core 33 is slidably arranged in the auxiliary exhaust reversing section 3212, the first auxiliary intake port G and the second auxiliary intake port H are opened on the cavity wall of the auxiliary exhaust reversing section 3212, when the first working section 325 is communicated with the main intake section 326 and the second working section 327 is communicated with the second exhaust section 328, the auxiliary exhaust valve core 33 slides to the second state that the second auxiliary intake port H is communicated with the second auxiliary exhaust port S2; when the second working section 327 is communicated with the main intake section 326 and the first working section 325 is communicated with the first exhaust section 324, the auxiliary exhaust valve core 33 slides to the first state that the first auxiliary intake port G is communicated with the first auxiliary exhaust port S2.

[0075] Specifically, the first auxiliary exhaust port S1 and the second auxiliary exhaust port S2 are respectively communicated with the first auxiliary exhaust section 3211 and the second auxiliary exhaust section 3213; the auxiliary exhaust valve core 33 is slidably connected with the inner wall of the auxiliary exhaust reversing section 3212, the first auxiliary intake port G and the second auxiliary intake port H are respectively communicated with the first side (such as the left side shown in Figure 8 ) and the second side (such as the right side shown in Figure 8 ) of the auxiliary exhaust reversing section 3212, when the first working port A is communicated with the first intake port P and the second working port B is communicated with the reversing exhaust port, the first side of the auxiliary exhaust reversing section 3212 intakes and the second side of the auxiliary exhaust reversing section 3212 exhausts to push the auxiliary exhaust valve core 33 to slide to the second state, that is, slide to the left to the second state as shown in Figure 15 and Figure 16 , and when the second working port B is communicated with the first intake port P and the first working port A is communicated with the reversing exhaust port, the first side of the auxiliary exhaust reversing section 3212 exhausts and the second side of the auxiliary exhaust reversing section 3212 intakes to push the auxiliary exhaust valve core 32 to slide to the first state, that is, slide to the left to the first state as shown in Figure 8 .

[0076] Specifically, the radial dimension of the auxiliary exhaust reversing section 3212 is matched with the auxiliary exhaust valve core 33 to be slidably connected with the auxiliary exhaust valve core 33, at the same time, an air-tight seal can be formed between them to cut off the communication between the first auxiliary exhaust section 3211 and the second auxiliary exhaust section 3213 on the left and right sides.

[0077] In the case of Figure 15When the first working port A is connected to the first air inlet P and the second working port B is connected to the second reversing exhaust port R2, the gas entering at the first air inlet P can be discharged from the first working port A into the first air chamber 12, and at the same time, it can also be discharged from the first auxiliary air inlet G into the first end of the auxiliary exhaust reversing section 3212 (e.g., Figure 16 (as shown on the left end), and push the auxiliary exhaust valve core 33 to slide to the right, so that it slides to the left end. Figure 16 In the second state shown, the second auxiliary exhaust passage is in the open state, connecting the second auxiliary air inlet H and the second auxiliary exhaust section 3213, thereby connecting the second auxiliary air inlet H and the second auxiliary exhaust port S2, i.e., connecting the second working section 327 and the second exhaust section 328. Furthermore, the second auxiliary exhaust passage assists in connecting the second working port B and the second reversing exhaust port R2. That is, through the reversing valve core 32 in the reversing switching chamber 311, the second working port B and the second reversing exhaust port R2 are connected. At the same time, the second auxiliary exhaust passage assists in connecting the second working port B and the second reversing exhaust port R2, which can assist in exhausting the second working port B, thereby assisting in exhausting the second air chamber 13. Simultaneously, the first auxiliary exhaust passage is in the sealed state, cutting off the first auxiliary air inlet G and the second auxiliary exhaust port S2, thereby cutting off the internal connection of the valve cores of the first working section 325 and the first exhaust section 324, and further cutting off the internal connection of the valve cores of the first working port A and the first reversing exhaust port R1, thus preventing the air intake of the first working port A from being discharged from the first auxiliary exhaust passage.

[0078] In such Figure 7 When the second working port B is connected to the first air inlet P and the first working port A is connected to the first reversing exhaust port R1, the gas entering at the first air inlet P can be discharged into the second air chamber 13 through the second working port B, and at the same time, it is also discharged into the second end of the auxiliary exhaust reversing section 3212 (e.g., from the second auxiliary air inlet H). Figure 8 (as shown on the right end), and push the auxiliary exhaust valve core 33 to slide to the left, so that it slides to the position shown on the right end. Figure 8In the first state shown, the first auxiliary exhaust passage is in an open state, the first auxiliary exhaust passage is connected with the first auxiliary intake port G and the first auxiliary exhaust section 3211, so as to connect the first auxiliary intake port G and the first auxiliary exhaust port S1, that is, to connect the first working section 325 and the first exhaust section 324, and then the first auxiliary exhaust passage is connected with the first working port A and the first reversing exhaust port R1, that is, the reversing valve core 32 in the reversing switching cavity 311 is switched, so that the first working port A is connected with the first reversing exhaust port R1 at the same time, the second auxiliary exhaust passage is connected with the first working port A and the first reversing exhaust port R1, which can assist the exhaust of the first working port A, so as to assist the exhaust of the first air cavity 12; at the same time, the second auxiliary exhaust passage is in a sealed state, the second auxiliary exhaust passage is cut off between the second auxiliary intake port H and the second auxiliary exhaust section 3213, so as to cut off the internal communication between the second working section 327 and the second exhaust section 328, and then the internal communication between the second working port B and the second reversing exhaust port R2 is cut off, so as to avoid the exhaust of the second working port B from the second auxiliary exhaust passage.

[0079] In this embodiment, as shown in Figure 9 , the reversing valve core 32 is provided with a first limiting portion 322 for limiting and supporting the auxiliary exhaust valve core 33, so that the auxiliary exhaust valve core 33 is in the first state; as shown in Figure 10 , the reversing valve core 32 is provided with a second limiting portion 323 for limiting and supporting the auxiliary exhaust valve core 33, so that the auxiliary exhaust valve core 33 is in the second state.

[0080] Continuing to refer to Figures 8 to 10 , the auxiliary exhaust valve core 33 comprises a valve core body 331, a first switching rod 332 and a second switching rod 333 respectively arranged on both sides (such as the left and right sides shown in Figure 8 ) of the valve core body 331; wherein the valve core body 331 can slide along the inner wall of the auxiliary exhaust reversing section 3212 and form an airtight seal with the inner wall of the auxiliary exhaust reversing section 3212; the first switching rod 332 is driven by the valve core body 331 to realize the on-off switching between the first auxiliary intake port G and the first auxiliary exhaust port S1; the second switching rod is driven by the valve core body to realize the on-off switching between the second auxiliary intake port H and the second auxiliary exhaust port S2.

[0081] Specifically, the auxiliary exhaust reversing section 3212 and the first auxiliary exhaust section 3211 are further provided with a first switching cavity 3214 matched with the first switching rod 332, the first auxiliary air inlet G is arranged on the cavity wall of the first switching cavity 3214, the first switching rod 332 is slidably arranged in the first switching cavity 3214, and a first gap 3215 is formed between the outer wall of the first switching rod 332 and the inner wall of the first switching cavity 3214, so as to connect the first auxiliary exhaust section 3211 and the first auxiliary air inlet G to form a first auxiliary exhaust passage; the auxiliary exhaust reversing section 3212 and the second auxiliary exhaust section 3213 are further provided with a second switching cavity 3216 matched with the second switching rod 333, the second auxiliary air inlet H is arranged on the cavity wall of the second switching cavity 3216, the second switching rod 333 is slidably arranged in the second switching cavity 3216, and a second gap 3217 is formed between the outer wall of the second switching rod 333 and the inner wall of the second switching cavity 3316, so as to connect the second auxiliary exhaust section 3213 and the second auxiliary air inlet H to form a second auxiliary exhaust passage. Wherein, the first auxiliary air inlet G is arranged at the end of the first switching cavity 3214 close to the auxiliary exhaust reversing section 3212, the first auxiliary air inlet G is connected with the right end of the first switching cavity 3214 (relative to the position shown in the figure), and the second auxiliary air inlet H is arranged at the end of the second switching cavity 3216 close to the auxiliary exhaust reversing section 3212, the second auxiliary air inlet H is connected with the left end of the second switching cavity 3216 (relative to the position shown in the figure). Figure 8 Figure 8

[0082] Further, the axial dimension (such as the length in the horizontal direction shown in the figure) of the valve core body 331 is smaller than the axial dimension (such as the length in the horizontal direction shown in the figure) of the auxiliary exhaust reversing section 3212. Figure 8 Figure 8 ​​​The valve core body 331 is capable of sliding left and right at the auxiliary exhaust reversing section 3212, and the length in the horizontal direction is greater than the length of the first auxiliary intake port G and the second auxiliary intake port H (the length in the horizontal direction shown in the figure), so that the valve core body 331 is capable of sliding at the auxiliary exhaust reversing section 3212. The radial dimension of the valve core body 331 is greater than the radial dimension of the first switching rod 332 and the second switching rod 333, and the two end faces of the valve core body 331 form an action surface on which the compressed gas coming from the first auxiliary intake port G or the second auxiliary intake port H acts to push the auxiliary exhaust valve core 33 to slide, wherein the first switching cavity 3214 and the second switching cavity 3216 are respectively matched with the first switching rod 332 and the second switching rod 333, and the connection between the first switching rod 332 and the auxiliary exhaust reversing section 3212 forms a stepped structure which can be used as a first limiting portion 322 to limit the limit position of the left sliding of the valve core body 331, and the connection between the second switching rod 333 and the auxiliary exhaust reversing section 3212 forms a stepped structure which can be used as a second limiting portion 323 to limit the limit position of the right sliding of the valve core body 331. The first switching rod 332 and the inner wall of the first switching cavity 3214 can be gap-fitted, and a first gap 3215 is formed between the two, which can communicate the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212 to form a first auxiliary exhaust passage. The second switching rod 333 and the inner wall of the second switching cavity 3216 can be gap-fitted, and a second gap 3217 is formed between the two, which can communicate the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212 to form a second auxiliary exhaust passage.

[0083] Continuing to refer to Figures 8 to 10 The first switching rod 332 is sleeved with a first sealing ring 34, and the first sealing ring 34 is capable of sliding with the first switching rod 332 to realize the switching of the connection between the first auxiliary intake port G and the first auxiliary exhaust port S1. The second switching rod 333 is sleeved with a second sealing ring 35, and the second sealing ring 35 is capable of sliding with the second switching rod 333 to realize the switching of the connection between the second auxiliary intake port H and the second auxiliary exhaust port S2.

[0084] Specifically, when the auxiliary exhaust valve core 33 is in the second state, the first sealing ring 34 seals the first gap 3215, cutting off the first auxiliary exhaust passage; when the auxiliary exhaust valve core 33 is in the first state, the second sealing ring 35 seals the second gap 3217, cutting off the second auxiliary exhaust passage; the first sealing ring 34 is sleeved on the left end of the first switching rod 332, and the second sealing ring 35 is sleeved on the right end of the second switching rod 333. When the auxiliary exhaust valve core 33 is in the second state, the first sealing ring 34 slides into the first gap 3215, sealing the first gap 3215 and cutting off the first auxiliary exhaust passage, thereby cutting off the connection between the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212, that is, cutting off the connection between the first auxiliary air intake port G and the first auxiliary exhaust port S1. 35 then slides into the second auxiliary exhaust section 3213 to ensure that the second gap 3217 connects the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212 to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core 33 is in the first state, the first sealing ring 34 slides into the first auxiliary exhaust section 3211 to ensure that the first gap 3215 connects the first end of the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212 to form a first auxiliary exhaust passage, and the second sealing ring 35 is located in the second gap 3217, which can seal the second gap 3217 to cut off the second auxiliary exhaust passage, thereby cutting off the connection between the second end of the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212, that is, cutting off the connection between the second auxiliary air intake port H and the second auxiliary exhaust port S2.

[0085] See also Figures 8 to 9 A third sealing ring 36 is provided on the valve core body 331 to seal the gap between the outer wall of the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212, so that an air seal is formed between the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212. Specifically, there can be one or more third sealing rings 36. In this embodiment, two third sealing rings 36 are used as an example. The two third sealing rings 36 are respectively sleeved on both ends of the valve core body 331, so that an air seal is formed between the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212. This can cut off the connection between the first auxiliary exhaust section 3211 and the second auxiliary exhaust section 3213, and cut off the connection between the left and right ends of the auxiliary exhaust reversing section 3212, that is, cut off the connection between the first auxiliary air inlet G and the second auxiliary air inlet H. At the same time, it can ensure that the auxiliary exhaust valve core 33 can slide synchronously with the reversing valve core 32 relative to the reversing valve body 31. That is, when the reversing valve core 32 slides relative to the reversing valve body 31, the auxiliary exhaust valve core 33 moves synchronously with the reversing valve core 32, and the auxiliary exhaust valve core 33 can also slide relative to the reversing valve core 32.

[0086] See also Figure 3 ,Figure 4 , Figures 7 to 19 The working process of this energy-saving hydraulic station with dual-sided pneumatically controlled combined directional valves will be described in detail below.

[0087] like Figure 7 As shown, when the first control port Y1 exhausts air and the second control port Y2 intakes air, the reversing valve core 32 is placed at the left end. The second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324. That is, the second working port B is connected to the first intake port P and the first working port A is connected to the first reversing exhaust port R1. The gas entering at the first intake port P can be discharged into the second air chamber 13 through the second working port B, and at the same time, it is also discharged into the second end of the auxiliary exhaust reversing section 3212 (e.g., from the second auxiliary intake port H) through the second auxiliary intake port H. Figure 8 (as shown on the right end), and push the auxiliary exhaust valve core 33 to slide to the left, so that it slides to the position shown on the right end. Figure 8 The left limit shown is in the first state. It connects the first auxiliary air inlet G and the first auxiliary exhaust section 3211 through the first auxiliary exhaust channel, realizing the connection between the first working port A and the first auxiliary exhaust port S1. That is, the left end of the auxiliary exhaust valve core 33 is open for exhaust and the right end is closed for exhaust. At the same time, the second working port B supplies air to the second air chamber 13. The cylinder piston 11 can slide to the left. When the cylinder piston 11 slides to the left end under the action of air pressure, that is, when it moves to the position, the cylinder piston 11 triggers the first reversing trigger device 5, so that the third air outlet C and the second air inlet E are connected, realizing the connection between the air source and the first control port Y1, and the first control port Y1 is inlet.

[0088] like Figure 11 As shown, when air enters through the first control port Y1, it pushes the directional valve core 32 to move to the right; when the directional valve core 32 moves to the position shown... Figure 13 The first working port A shown is closed to the first reversing exhaust port R1, as shown. Figure 12 As shown, when the first working port A and the first air inlet P are just connected, at this time, as... Figure 14 As shown, the second working port B and the second reversing exhaust port R2 are not yet open, meaning the reversing valve core 32 is in the neutral position, allowing air to enter the first working section 325 while the second working section 327 does not exhaust. Therefore, the second air chamber 13 maintains pressure. At this time, the positional relationship between the auxiliary exhaust valve core 33 and the reversing valve core 32 remains unchanged. (Refer to...) Figure 8As shown in the positional relationship, the air intake at the first working port A is discharged through the first auxiliary exhaust port S1 to the first reversing exhaust port R1 to remove the air intake at the first working port A. The air intake in the first air chamber 11 can then be discharged through the first auxiliary exhaust port S1 and the first reversing exhaust port R1. This prevents the air pressure at the first working port A from preventing the reversing valve core 32 from continuing to slide, avoids jamming of the reversing valve 3, and also avoids jamming of the cylinder 1. Since the air intake at the first working port A can be discharged through the first auxiliary exhaust passage, the cylinder piston 11 can continue to move to the left under the air pressure maintained in the second air chamber 13, ensuring continuous air intake at the first control port Y1 so that the reversing valve core 32 continues to move to the right.

[0089] Until the directional valve core 32 moves to the position of the valve core. Figure 15 When the first working port A is fully connected to the first air intake port P, and the second working port B is connected to the second reversing exhaust port R2, that is, when the first working section 325 is connected to the main air intake section 326 and the second working section 327 is connected to the second exhaust section 328, since the first working port A connected to the first auxiliary air intake port G has air pressure, and the second working port B connected to the second auxiliary air intake port H has no air pressure, the left end of the auxiliary exhaust reversing section 3212 has air pressure, and the right end has no air pressure. Therefore, the auxiliary exhaust valve core 33 is pushed to the right to move as shown. Figure 16 At the right limit position shown, i.e., in the second state, the second auxiliary air intake port H and the second auxiliary exhaust port S2 are connected, while the connection between the first auxiliary air intake port G and the second auxiliary exhaust port S2 is cut off. That is, the right end of the auxiliary exhaust valve core 33 is open for exhaust, and the left end is closed for exhaust. At this time, the first working port A supplies air to the first air chamber 12, the cylinder piston 11 can slide to the right, and the right end of the auxiliary exhaust valve core 33 is connected to the exhaust.

[0090] When the cylinder piston 11 slides to the right end under air pressure, the cylinder piston 11 triggers the second reversing trigger device 6, and air enters through the second control port Y2, pushing the reversing valve core 32 to move to the left. Figure 17 As shown, when the reversing valve core 32 moves to the point where the second working port B and the second reversing exhaust port R2 are closed, as... Figure 19 When the second working port B shown is just connected to the first air inlet P, due to... Figure 18The first working port A is connected to the first reversing exhaust port R1, meaning the exhaust from the first working port A is not yet open and pressure is maintained. The intake air from the second working port B is discharged through the second auxiliary exhaust passage, preventing it from entering the second air chamber 13 and causing the cylinder piston 11 to move in the opposite direction. Since the intake air from the second working port B can be discharged through the second auxiliary exhaust passage, the cylinder piston 11 can continue to move to the left under the pressure maintained in the first air chamber 11, either to reach its position or to remain in the trigger position, ensuring continuous intake air from the second control port Y2, so that the reversing valve core 32 continues to move to the left until the second working port B is fully connected to the first intake port P. When the first working port A is connected to the first reversing exhaust port R1, since the second working port B connected to the second auxiliary intake port H has pressure, and the first working port A connected to the first auxiliary intake port G has no pressure, the right end of the auxiliary exhaust reversing section 3212 has pressure, while the left end has no pressure. Therefore, the auxiliary exhaust valve core 33 is pushed to the left to reach the position shown in the diagram. Figure 8 As shown, the left end limit position is in the first state, and the left end of the auxiliary exhaust valve core 33 is open for exhaust. At this time, the second working port B supplies air to the second air chamber 13, and the left end of the auxiliary exhaust valve core 33 is connected to the exhaust.

[0091] In this embodiment, the internal structure of the electromagnetically controlled directional valve, namely the structure between the directional valve core and the directional valve body, as well as the structure and relative position of the auxiliary exhaust valve core inside the directional valve core, especially the structure and relative position of the auxiliary exhaust valve core inside the directional valve core, can all refer to the specific structure of the double-sided pneumatically controlled directional valve. In this embodiment, it will not be described in detail.

[0092] In summary, the directional valve core, directional valve, and energy-saving hydraulic station provided in this embodiment can switch between different states of the directional valve core 32 by setting an auxiliary exhaust valve core 33 inside the directional valve core 32. When the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 connects the second working section 327 and the second exhaust section 328 to provide auxiliary exhaust to the second working section 327, that is, to provide auxiliary exhaust to the second air chamber 13. This causes the cylinder piston 11 to move towards the second air chamber 13 under the action of the air pressure in the first air chamber 12. The directional valve 3 moves to the side to trigger the second reversing trigger device 6, thereby causing the reversing valve 3 to reversing into position. This controls the reversing valve 3 to reversing until it connects the second working section 327 and the main intake section 326, and connects the first working section 325 and the first exhaust section 324. Especially when the air source pressure drops or fluctuates significantly, the reversing valve 3 can switch to the state where the second working section 327 and the main intake section 326 are connected, and the first working section 325 and the first exhaust section 324 are connected, i.e., the second air chamber 13 is intake and the first air chamber 12 is exhaust, preventing the cylinder from jamming, i.e., preventing the cylinder piston from stopping. The movement causes the hydraulic pressure to stop, resulting in the tooling losing pressure and causing phenomena such as workpiece not being clamped tightly or tool collision. When the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324, the auxiliary exhaust valve core 33 connects the first working section 325 and the first exhaust section 324 to provide auxiliary exhaust to the first working section 325, that is, to provide auxiliary exhaust to the first air chamber 12. This causes the cylinder piston 11 to move towards the side where the first air chamber 12 is located under the action of the air pressure in the second air chamber 13, thereby triggering the second reversing trigger device 6, which in turn causes the reversing valve 3 to reversing into place, controlling the... The reversing valve 3 reverses until it connects the second working section 327 and the main air intake section 326 and the first working section 325 and the first exhaust section 324. Especially when the air source pressure drops or fluctuates greatly, the reversing valve 3 can switch to the state where the second working section 327 and the main air intake section 326 are connected and the first working section 325 and the first exhaust section 324 are connected, that is, the first air chamber 12 is inlet and the second air chamber 13 is outlet. This avoids the cylinder from getting stuck, that is, it avoids the cylinder piston from stopping moving and no longer outputting hydraulic pressure, which would cause the tooling to lose pressure and the workpiece to be not clamped tightly, or the tool to collide.

[0093] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0094] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0095] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A directional control valve core, comprising a main intake section communicatively connected to a first intake port on a directional control valve body, a first exhaust section and a second exhaust section communicatively connected to a directional control exhaust port on a directional control valve body, a first working section communicatively connected to a first working port on a directional control valve body, and a second working section communicatively connected to a second working port on a directional control valve body; characterized in that, The reversing valve core is provided with an auxiliary exhaust chamber, and an auxiliary exhaust valve core is installed in the auxiliary exhaust chamber. When the first working section is connected to the main intake section and the second working section is connected to the second exhaust section, the auxiliary exhaust valve core is connected to the second working section and the second exhaust section; when the second working section is connected to the main intake section and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core is connected to the first working section and the first exhaust section.

2. The directional valve core according to claim 1, characterized in that, The first working section and the first exhaust section are respectively provided with a first auxiliary air inlet and a first auxiliary exhaust outlet that communicate with the auxiliary exhaust chamber; The second working section and the second exhaust section are respectively provided with a second auxiliary air inlet and a second auxiliary exhaust outlet that are connected to the auxiliary exhaust chamber.

3. The directional valve core according to claim 2, characterized in that, The auxiliary exhaust chamber includes: a first auxiliary exhaust section, an auxiliary exhaust reversing section, and a second auxiliary exhaust section arranged sequentially; wherein... The auxiliary exhaust valve core is slidably disposed within the auxiliary exhaust reversing section; The first auxiliary exhaust port is connected to the first auxiliary exhaust section, and the second auxiliary exhaust port is connected to the second auxiliary exhaust section; The first auxiliary air inlet and the second auxiliary air inlet are located on the cavity wall of the auxiliary exhaust reversing section. When the first working section is connected to the main air inlet and the second working section is connected to the second exhaust section, the auxiliary exhaust valve core slides to a second state where the second auxiliary air inlet is connected to the second auxiliary exhaust port. When the second working section is connected to the main air inlet and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core slides to a first state where the first auxiliary air inlet is connected to the first auxiliary exhaust port.

4. The directional valve core according to claim 3, characterized in that, The auxiliary exhaust valve core includes: a valve core body, a first switching lever and a second switching lever respectively located on both sides of the valve core body; wherein... The valve core body can slide along the inner wall of the auxiliary exhaust reversing section and form an air seal with the inner wall of the auxiliary exhaust reversing section. The first switching lever, driven by the valve core body, enables the switching between the first auxiliary air inlet and the first auxiliary exhaust port. The second switching lever, driven by the valve core body, switches between the second auxiliary air inlet and the second auxiliary exhaust port.

5. A directional control valve core according to claim 4, characterized in that, A first switching chamber adapted to the first switching rod is provided between the auxiliary exhaust reversing section and the first auxiliary exhaust section, and the first auxiliary air inlet is opened on the cavity wall of the first switching chamber. A second switching chamber adapted to the second switching lever is provided between the auxiliary exhaust reversing section and the second auxiliary exhaust section, and the second auxiliary air inlet is opened on the cavity wall of the second switching chamber.

6. A directional control valve core according to claim 4, characterized in that, The radial dimension of the valve core body is greater than the radial dimension of the first switching rod and the second switching rod. Its two end faces form an action surface. Compressed gas entering from the first auxiliary air inlet or the second auxiliary air inlet acts on the action surface and pushes the auxiliary exhaust valve core to slide.

7. A directional control valve core according to claim 6, characterized in that, A first sealing ring is fitted on the first switching rod, and the first sealing ring can slide with the first switching rod to realize the switching between the first auxiliary air inlet and the first auxiliary exhaust port; The second switching rod is fitted with a second sealing ring, which can slide with the second switching rod to switch between the second auxiliary air inlet and the second auxiliary exhaust outlet.

8. A directional valve core according to any one of claims 1-7, characterized in that, When the reversing valve core is in the neutral position, allowing air to enter the first working section and not to exhaust from the second working section, the auxiliary exhaust valve core connects the first working section and the first exhaust section to achieve communication between the first working port and the reversing exhaust port. When the reversing valve core is in the neutral position, allowing air to enter the second working section and not to exhaust from the first working section, the auxiliary exhaust valve core connects the second working section and the second exhaust section to achieve communication between the second working port and the reversing exhaust port.

9. A directional control valve having a directional control valve spool according to any one of claims 1-8.

10. A hydraulic station having the directional valve of claim 9.

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