Auxiliary exhaust valve and pneumatic hydraulic station with same

Abstract

The utility model provides an auxiliary exhaust valve and a pneumatic hydraulic station with the auxiliary exhaust valve. The auxiliary exhaust valve comprises an auxiliary exhaust valve shell and an auxiliary exhaust valve element. The auxiliary exhaust valve shell is provided with an auxiliary exhaust valve cavity, a third working opening, a fourth working opening and an auxiliary exhaust opening. The auxiliary exhaust valve element is arranged in the auxiliary exhaust valve cavity in a sliding mode so as to slide to a first state or a second state, in the first state, the third working opening and the auxiliary exhaust opening can be communicated, and communication between the fourth working opening and the auxiliary exhaust opening can be cut off; and in the second state, the fourth working port is communicated with the auxiliary exhaust port, and communication between the third working port and the auxiliary exhaust port is cut off. According to the utility model, the third working port or the fourth working port is switched to be communicated with the auxiliary exhaust port through the auxiliary exhaust valve, so as to respectively carry out auxiliary exhaust on the two air cavities of the air cylinder and prevent the piston of the air cylinder from being blocked and stopped.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic station technology, and more specifically, to an auxiliary exhaust valve and a pneumatic hydraulic station having the auxiliary exhaust valve. Background Technology

[0002] A hydraulic power unit is a hydraulic device that supplies oil according to the required flow direction, pressure and flow rate, and is usually used in conjunction with machine tools that require hydraulically driven actuators.

[0003] See Figure 1 This is a schematic diagram of a hydraulic station provided in the prior art. As shown in the figure, the hydraulic station includes: a linked cylinder 1' and an oil cylinder 2'; wherein, the cylinder end caps on both sides of cylinder 1' are respectively provided with a first reversing trigger device 3' and a second reversing trigger device 4', and cylinder 1' is connected to a pneumatically controlled reversing valve 5', with the air source connected to the air inlet of the first reversing trigger device 3', the second reversing trigger device 4', and the pneumatically controlled reversing valve 5'; the working port A' of the pneumatically controlled reversing valve 5' is connected to one side of cylinder 1', and the working port B' of the pneumatically controlled reversing valve 5' is connected to cylinder 1'. The other side is connected; the first reversing trigger device 3' is connected to the pneumatic reversing valve 5' to control the pneumatic reversing valve 5' to start the A' working port of the pneumatic reversing valve 5' so that the A' working port of the pneumatic reversing valve 5' is connected to the P' inlet port of the pneumatic reversing valve 5'; the second reversing trigger device 4' is connected to the pneumatic reversing valve 5' to control the pneumatic reversing valve 5' to start the B' working port of the pneumatic reversing valve 5' so that the B' working port of the pneumatic reversing valve 5' is connected to the P' inlet port of the pneumatic reversing valve 5'.

[0004] The working process of the above-mentioned pneumatic hydraulic station is as follows: When the pneumatic piston is located on the left side of cylinder 1', the first reversing trigger device 3' is triggered to open, pushing the pneumatic reversing valve 5' to reverse. Compressed air enters cylinder 1' from working port A', specifically into the space to the left of the pneumatic piston, thus pushing the pneumatic piston to the right (the first reversing trigger device 3' is reset and cut off), driving the hydraulic piston in cylinder 2' to move to the right; when the pneumatic piston moves to the right side of cylinder 1', the second reversing trigger device 4' is triggered to open, pushing the pneumatic reversing valve 5' to reverse, compressing... Air enters cylinder 1' through port B', specifically into the space to the right of the pneumatic piston, thus pushing the pneumatic piston to the left (the second reversing trigger device 4' is reset and cut off), which in turn drives the piston in cylinder 2' to the left, causing hydraulic oil to flow in and out. Cylinder 1' reciprocates to form a continuous hydraulic output. When the set pressure is reached, cylinder 1' stops moving to maintain a constant pressure. Cylinder 1' remains in a pressurized state and stops moving, thus no longer consuming compressed air. Compared to traditional hydraulic stations, this reduces energy consumption and heat generation, achieving energy saving.

[0005] As is well known in the art, in order to avoid simultaneous exhaust from both sides of the cylinder, the pneumatic reversing valve 5' has the characteristic of first-to-last exhaust, that is, the connection port corresponding to the intake port is connected first, while the connection port corresponding to the exhaust port is delayed in connection.

[0006] like Figure 2 As shown, when the pneumatic directional valve core is pushed to the right, that is, during the process of A' working port switching from intake to exhaust and B' working port switching from exhaust to intake, when the intake of A' working port is closed but the exhaust has not yet opened, the exhaust of B' working port closes. At the moment the intake just opens, that is, when B' working port just starts to receive air, and simultaneously A' working port is closed for both intake and exhaust, due to the higher pressure in the chamber connected to A' working port, the chamber connected to B' receives air from B' working port, causing pressure in both cylinders. This causes the pilot valve corresponding to the chamber connected to B' working port to reset and close, or the air source pressure to decrease, resulting in a decrease in the air pressure pushing the pneumatic directional valve core to the right, causing the pneumatic directional valve to jam. The jamming of the directional valve causes the cylinder piston to stop moving, resulting in no more hydraulic pressure output. The tooling loses pressure, leading to problems such as workpiece not being clamped tightly and tool collision. Utility Model Content

[0007] In view of this, the present invention proposes an auxiliary exhaust valve and a pneumatic hydraulic station having the auxiliary exhaust valve, aiming to solve the problem of cylinder jamming in existing hydraulic stations.

[0008] On one hand, this utility model proposes an auxiliary exhaust valve, which includes an auxiliary exhaust valve housing and an auxiliary exhaust valve core; wherein, the auxiliary exhaust valve housing is provided with an auxiliary exhaust valve cavity, a third working port, a fourth working port, and an auxiliary exhaust port; the auxiliary exhaust valve core is slidably disposed in the auxiliary exhaust valve cavity to slide to a first state or a second state; the third working port and the fourth working port are respectively connected to both ends of the auxiliary exhaust valve cavity, and are used to apply force to the auxiliary exhaust valve core to make the auxiliary exhaust valve core slide to the first state or the second state: in the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off; in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off.

[0009] Furthermore, in the aforementioned auxiliary exhaust valve, a connecting channel is provided on the auxiliary exhaust valve core or the auxiliary exhaust valve housing; when the auxiliary exhaust valve core is in the second state, the connecting channel is at least partially located between the fourth working port and the auxiliary exhaust port, connecting the fourth working port and the auxiliary exhaust port to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core is in the first state, the connecting channel is at least partially located between the third working port and the auxiliary exhaust port, connecting the third working port and the auxiliary exhaust port to form a first auxiliary exhaust passage.

[0010] Furthermore, in the aforementioned auxiliary exhaust valve, a first sealing ring and a second sealing ring are fitted on the auxiliary exhaust valve core. When the auxiliary exhaust valve core is in the first state, the second sealing ring is located between the fourth working port and the auxiliary exhaust port, cutting off the second auxiliary exhaust passage. When the auxiliary exhaust valve core is in the second state, the first sealing ring is located between the third working port and the auxiliary exhaust port, cutting off the first auxiliary exhaust passage.

[0011] Furthermore, in the aforementioned auxiliary exhaust valve, a circumferential orifice is provided between the auxiliary exhaust valve core and the auxiliary exhaust valve housing. The second sealing ring is used to be located within the circumferential orifice between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in the first state, forming an internal seal. The first sealing ring is used to be located within the circumferential orifice between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in the second state, forming an internal seal.

[0012] Furthermore, in the aforementioned auxiliary exhaust valve, the two ends of the auxiliary exhaust valve core are respectively provided with a first end face sealing structure and a second end face sealing structure, the first sealing ring is disposed between the auxiliary exhaust valve core and the first end face sealing structure, and the second sealing ring is disposed between the auxiliary exhaust valve core and the second end face sealing structure.

[0013] Furthermore, in the aforementioned auxiliary exhaust valve, the auxiliary exhaust valve housing has a first step structure and a second step structure inside the auxiliary exhaust valve cavity. The first step structure and the second step structure correspond to the first end face sealing structure and the second end face sealing structure, respectively. The second sealing ring is used when the auxiliary exhaust valve core is in the first state, located between the second step structure and the second end face sealing structure to form an end face seal, thereby sealing the gap between the second step structure and the second end face sealing structure. The first sealing ring is used when the auxiliary exhaust valve core is in the second state, located between the first step structure and the first end face sealing structure to form an end face seal, thereby sealing the gap between the first step structure and the first end face sealing structure.

[0014] Furthermore, in the aforementioned auxiliary exhaust valve, the two ends of the auxiliary exhaust valve core are respectively provided with a first inclined sealing structure and a second inclined sealing structure, the first sealing ring is disposed between the auxiliary exhaust valve core and the first inclined sealing structure, and the second sealing ring is disposed between the auxiliary exhaust valve core and the second inclined sealing structure.

[0015] Furthermore, in the aforementioned auxiliary exhaust valve, the auxiliary exhaust valve housing is provided with a first inclined support structure and a second inclined support structure inside the auxiliary exhaust valve cavity. The first inclined support structure and the second inclined support structure correspond to the first inclined sealing structure and the second inclined sealing structure, respectively. The second sealing ring is used to press against the second inclined sealing structure when the auxiliary exhaust valve core is in the first state, forming an inclined seal to seal the gap between the second inclined sealing structure and the second inclined support structure. The first sealing ring is used to press against the first inclined sealing structure when the auxiliary exhaust valve core is in the second state, forming an inclined seal to seal the gap between the first inclined sealing structure and the first inclined support structure.

[0016] Furthermore, in the aforementioned auxiliary exhaust valve, the auxiliary exhaust valve housing has a sliding engagement protrusion at the middle position of the auxiliary exhaust valve cavity, and the auxiliary exhaust valve core is slidably connected to the sliding engagement protrusion; the auxiliary exhaust port is opened on the sliding engagement protrusion.

[0017] Furthermore, in the aforementioned auxiliary exhaust valve, the auxiliary exhaust valve housing is provided with a first limiting part and a second limiting part, which are used to limit and support the auxiliary exhaust valve core respectively, so that the auxiliary exhaust valve core is in the first state and the second state respectively.

[0018] Furthermore, in the aforementioned auxiliary exhaust valve, the auxiliary exhaust valve is arranged in parallel with the reversing valve, the third working port of the auxiliary exhaust valve and the first working port of the reversing valve are respectively connected to the first air chamber, and the fourth working port of the auxiliary exhaust valve and the second working port of the reversing valve are respectively connected to the second air chamber.

[0019] On the other hand, this utility model also proposes a pneumatic hydraulic station, which includes a cylinder and the aforementioned auxiliary exhaust valve. The third working port of the auxiliary exhaust valve is connected to the first air chamber of the cylinder, and the fourth working port of the auxiliary exhaust valve is connected to the second air chamber of the cylinder.

[0020] The auxiliary exhaust valve and pneumatic-hydraulic station with the auxiliary exhaust valve provided by this utility model can switch between two states through the auxiliary exhaust valve connected to the two cylinder chambers. In the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off to assist in exhausting the first chamber, so as to avoid the cylinder piston from getting stuck. It can also discharge the gas entering the first chamber when the reversing valve is not in the neutral position, that is, when the first chamber is filled with air and the second chamber is not exhausted. This allows the cylinder piston to move towards the cylinder end cover on the side of the first chamber under the action of the air pressure in the second chamber, thereby triggering the reversing triggering device to make the reversing valve switch in place, controlling the reversing valve to switch until the corresponding exhaust port and air inlet are connected, switching to the state where the first chamber is filled with air and the second chamber is exhausted, thus preventing the cylinder piston from stopping and causing the hydraulic pressure to stop, that is, preventing the cylinder and reversing valve from being blocked. This prevents issues such as valve jamming, loss of tooling pressure leading to workpiece inability to be clamped, and tool collision. In the second state, the fourth working port is connected to the auxiliary exhaust port, while the third working port is disconnected from the auxiliary exhaust port. This provides auxiliary exhaust to the second air chamber, preventing cylinder piston jamming. It also allows for the discharge of gas entering the second air chamber when the directional valve is not fully switched (i.e., in the neutral position, causing air to enter the second air chamber but not exhaust from the first air chamber). This allows the cylinder piston to move towards the cylinder end cap on the first air chamber side under the pressure of the air in the first air chamber, triggering the directional valve to switch to the correct position. The directional valve then switches until the corresponding exhaust port and intake port are connected, switching to a state where the first air chamber is inlet and the second air chamber is exhausting. This prevents the cylinder piston from stopping and jamming, thus avoiding the loss of hydraulic pressure and preventing issues such as cylinder jamming, loss of tooling pressure leading to workpiece inability to be clamped, and tool collision. Attached Figure Description

[0021] 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:

[0022] Figure 1 This is a structural schematic diagram of a hydraulic station provided in the prior art;

[0023] Figure 2 A schematic diagram of the structure of a directional valve in a stuck state as provided in the prior art;

[0024] Figure 3 This is a schematic diagram of the structure of the pneumatic hydraulic station in the embodiment of the present invention, showing the process of the cylinder piston moving to the left.

[0025] Figure 4This is a schematic diagram of the structure of the pneumatic hydraulic station in which the cylinder piston moves to the right, provided in an embodiment of the present invention.

[0026] Figure 5 A schematic diagram of the auxiliary exhaust valve provided in an embodiment of this utility model; wherein the fourth working port is connected to the auxiliary exhaust port;

[0027] Figure 6 A schematic diagram of the auxiliary exhaust valve provided in an embodiment of this utility model; wherein the third working port is connected to the auxiliary exhaust port;

[0028] Figure 7 for Figure 5 A magnified view of a section at point M;

[0029] Figure 8 for Figure 5 A magnified view of a portion of point N in the middle;

[0030] Figure 9 A schematic diagram of the structure of the in-hole sealing auxiliary exhaust valve provided in an embodiment of this utility model; wherein, the third working port is connected to the auxiliary exhaust port;

[0031] Figure 10 A schematic diagram of the structure of the in-hole sealing auxiliary exhaust valve provided in an embodiment of this utility model; wherein, the fourth working port is connected to the auxiliary exhaust port;

[0032] Figure 11 A schematic diagram of the structure of the in-hole sealing auxiliary exhaust valve housing provided in an embodiment of this utility model;

[0033] Figure 12 A schematic diagram of the structure of the in-hole sealing auxiliary exhaust valve core provided in this embodiment of the utility model;

[0034] Figure 13 This is a cross-sectional view of the in-hole sealing auxiliary exhaust valve core at the connecting groove provided in an embodiment of the present utility model;

[0035] Figure 14 A schematic diagram of an end-face sealed auxiliary exhaust valve provided in an embodiment of this utility model; wherein the fourth working port is connected to the auxiliary exhaust port;

[0036] Figure 15 This is a schematic diagram of the end-face sealed auxiliary exhaust valve provided in an embodiment of the present utility model; wherein the third working port is connected to the auxiliary exhaust port.

[0037] Figure 16 A schematic diagram of the inclined sealing auxiliary exhaust valve provided in an embodiment of this utility model; wherein, the fourth working port is connected to the auxiliary exhaust port;

[0038] Figure 17A schematic diagram of the inclined sealing auxiliary exhaust valve provided in an embodiment of this utility model; wherein the third working port is connected to the auxiliary exhaust port;

[0039] Explanation of reference numerals in the attached drawings: 1-Cylinder, 11-Cylinder piston, 12-First air chamber, 13-Second air chamber, 2-Hydraulic cylinder, 21-Hydraulic cylinder piston, 3-First reversing trigger device, E-Second air inlet, C-Third exhaust port, 4-Second reversing trigger device, F-Third air inlet, D-Fourth exhaust port, 5-Reversing valve, P-First air inlet, A-First working port, B-Second working port, R1-First exhaust port, R2-First exhaust port, Y-First control port, Z-Second control port, 6-Linkage rod, 7-Auxiliary exhaust valve, 71-Auxiliary exhaust valve housing, 711-Auxiliary exhaust valve chamber, 7111-First large-diameter exhaust chamber, 7112-Small-diameter exhaust chamber, 7113-Second large-diameter exhaust chamber, 712-First Limiting part, 713-Second limiting part, 714-Sliding fit protrusion, 715-First step structure, 716-Second step structure, 717-First inclined support structure, 718-Second inclined support structure, 72-Auxiliary exhaust valve core, 721-Connecting channel, 722-First large diameter valve core, 723-Small diameter valve core, 724-Second large diameter valve core, 725-First connecting groove, 726-Second connecting groove, 727-First end face sealing structure, 728-Second end face sealing structure, 729-First inclined sealing structure, 7210-Second inclined sealing structure, 73-First sealing ring, 74-Second sealing ring, 8-Muffler, S-Auxiliary exhaust port, G-Third working port, H-Fourth working port. Detailed Implementation

[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] See Figure 3 and Figure 4 The figure illustrates a preferred structure of the pneumatic-hydraulic power unit provided in an embodiment of the present invention. As shown, the pneumatic-hydraulic power unit includes: a cylinder 1, an oil cylinder 2, a directional valve assembly, and an auxiliary exhaust valve 7.

[0042] The piston 21 of the hydraulic cylinder 2 is connected to the piston 11 of the air cylinder 1 via a linkage rod 6. The linkage rod 6 is slidably inserted through the cylinder end cap (e.g., in the air cylinder 1, near the hydraulic cylinder 2) located in the air cylinder 1. Figure 3 The left cylinder end cover shown allows the cylinder piston 21 to slide synchronously with the cylinder piston 11, thereby controlling the clamping and loosening of the machine tool clamping fixture through oil inlet and outlet.

[0043] Specifically, cylinder 1 has a through hole, through which cylinder 1 and cylinder 2 are connected. Cylinder 1 has a piston 11 that contacts its inner wall, and cylinder 2 has a piston 21 that contacts its inner wall. Cylinder piston 11 and cylinder piston 21 are connected by a linkage rod 6, which passes through the through hole. In this embodiment, both ends of the linkage rod 6 are fixedly connected to cylinder piston 11 and cylinder piston 21 respectively, to achieve linkage between cylinder 1 and cylinder 2. This embodiment uses a single cylinder as an example, but it can also use two cylinders; no limitation is made in this embodiment. In this embodiment, the piston area of ​​cylinder piston 11 is larger than that of cylinder piston 21. The piston area of ​​cylinder piston 11 can be several times larger than that of cylinder piston 21, thus facilitating pressure calculation. For example, if the piston area of ​​cylinder piston 11 is 6 times that of cylinder piston 21, then cylinder 1 outputs a pressure of 1 bar, and cylinder 2 outputs a pressure of 6 bar.

[0044] Cylinder 2 is connected to a reversing valve assembly for controlling the reversing movement of the cylinder piston 11 of cylinder 1. The reversing valve assembly includes a reversing trigger device that can send a signal that the cylinder piston 11 has moved to the position, and a reversing valve 5 that sequentially switches the intake and exhaust of the two cylinder chambers of cylinder 1 according to the signal from the reversing trigger device.

[0045] Specifically, there can be two reversing trigger devices: a first reversing trigger device 3 and a second reversing trigger device 4. The first reversing trigger device 3 and the second reversing trigger device 4 are respectively located at both ends of the cylinder 1 to obtain whether the cylinder piston 11 has moved to its designated positions at both ends, and to issue corresponding positioning signals when the cylinder piston 11 has moved to its designated positions. The reversing valve 5 is connected to the first reversing trigger device 3 and the second reversing trigger device 4 respectively, and sequentially switches the intake and exhaust of the two cylinder chambers of the cylinder 1 according to the positioning signals issued by the first reversing trigger device 3 and the second reversing trigger device 4.

[0046] See also Figure 3 The cylinder includes: a cylinder body, a cylinder piston 11, and a cylinder end cap; wherein, the cylinder piston 11 can slide along the inner wall of the cylinder body and form an air seal with the inner wall of the cylinder body, and the cylinder end cap is located at both ends of the cylinder body to seal the cylinder body.

[0047] In one embodiment of this example, such as Figures 3 to 4As shown, there are two reversing trigger devices, both of which are pneumatically controlled valves, which are respectively installed on the two cylinder end caps of cylinder 1. The reversing valve 5 is the corresponding pneumatically controlled reversing valve.

[0048] See section 3 to 3. Figure 4 The first air inlet P of the reversing valve 5, the second air inlet E of the first reversing trigger device 3, and the third air inlet F of the second reversing trigger device 4 are respectively connected to the air source. The reversing valve 5 includes a first control port Y and a second control port Z, a first working port A and a second working port B respectively connected to the two cylinder chambers on both sides of the piston of cylinder 1. The third exhaust port C of the first reversing trigger device 3 is connected to the first control port Y. After the first reversing trigger device 3 is activated, it sends a first move-in signal to the reversing valve 5. The reversing valve 5 reverses based on the first move-in signal to connect the second working port B and the first air inlet P. The fourth exhaust port D of the second reversing trigger device 4 is connected to the second control port Z. After the second reversing trigger device 4 is activated, it sends a second move-in signal to the reversing valve 5. The reversing valve 5 reverses based on the second move-in signal to connect the first working port A and the first air inlet P. In other words, after the first reversing trigger device 3 is activated by the cylinder piston 11, it controls the reversing valve 5 to connect the first working port A and the first air inlet P; the fourth exhaust port D of the second reversing trigger device 4 is connected to the second control port Z. After the second reversing trigger device 4 is activated by the cylinder piston 11, it controls the reversing valve 5 to connect the second working port B and the first air inlet P. In other words, in this embodiment, the reversing trigger device is a pneumatic control valve. When the cylinder piston 11 moves to the position, it can trigger the corresponding reversing trigger device, i.e., the pneumatic control valve, which can trigger the reversing trigger device to open, thereby injecting air and pressurizing the control port corresponding to the reversing valve 5 to push the reversing valve 5 to reverse. In other words, after the reversing trigger device is activated, it first injects air and pressurizes the control port corresponding to the reversing valve 5 as a signal to move to the position, i.e., a pneumatic control signal, to control the reversing valve 5 to reverse.

[0049] Specifically, the first reversing trigger device 3 is located at one end of the cylinder 1 (e.g., Figure 3 (As shown on the left end), the second reversing trigger device 4 is located at the other end of cylinder 1 (as shown on the left end). Figure 3(As shown on the right end), and both the first reversing trigger device 3 and the second reversing trigger device 4 are partially protruding from the cylinder cavities on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left or right into position, the first reversing trigger device 3 and the second reversing trigger device 4 can be activated respectively. In this embodiment, the first reversing trigger device 3, 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 exhaust port C and a second air inlet E. The sliding of the pneumatic control valve core can allow the pneumatic control valve core to slide to the corresponding position connecting the third exhaust port C and the second air inlet E. The second air inlet E is connected to the air source, and the third exhaust port C is connected to the first control port Y. The starting block protrudes from the outside of the pneumatic control valve body. When the cylinder piston 11 slides to the left end under the action of air pressure, the cylinder piston 11 can touch the starting block to realize the activation of the first reversing trigger device 3, so that the starting block and the pneumatic control valve core slide to the left until the third exhaust port C and the second air inlet E are connected, thereby realizing the connection between the air source and the first control port Y, so that pressure can be applied to the control chamber corresponding to the first control port Y, so that the reversing valve 5 performs sliding reversal, that is, pushes the valve core of the reversing valve 5 to move to the right and switches to the position where the first working port A and the first air inlet P are connected, that is, controls the reversing valve 5 to connect the first working port A and the first air inlet P, thereby making the cylinder piston 11 slide to the right.

[0050] In this embodiment, the structure of the second reversing trigger device 4 is similar to that of the first reversing trigger device 3. Specifically, the second mechanical valve 4 has a fourth exhaust port D and a third air inlet F, which are respectively connected to the second control port Z and the air source. When the cylinder piston 11 slides to the right end under air pressure, the cylinder piston 11 can trigger and activate the second reversing trigger device 4, thereby connecting the fourth exhaust port D and the third air inlet F, and connecting the second control port Z and the air source. This allows pressure to be applied to the control chamber corresponding to the second control port Z, causing the reversing valve 5 to slide to the left and switch to the position where the first working port A and the first air inlet P are connected. In other words, the reversing valve 5 is controlled to connect the first working port A and the first air inlet P, thus allowing the cylinder piston 11 to slide to the left. The specific structure and working principle of the second reversing trigger device 4 can be referred to the first reversing trigger device 3; therefore, the second reversing trigger device 4 will not be described in detail in this embodiment.

[0051] In another embodiment of this invention, the reversing trigger device can be an electronically controlled valve, and the reversing valve is a corresponding electromagnetic control valve. When the cylinder piston 11 moves to the position, it can send an electrical signal to the reversing valve. The reversing valve performs reversal based on the electrical signal to switch the intake and exhaust of the two cylinder chambers.

[0052] Specifically, the movement-to-position signal is an electrical signal. The reversing trigger device can be an electronically controlled valve, and there are two of them, respectively installed on the two cylinder end caps of cylinder 1. This is to detect whether the cylinder piston 11 has moved to the correct position at either end. When the cylinder piston 11 moves to the correct position, the reversing trigger device sends a corresponding side movement-to-position signal to the reversing valve 5. The reversing valve 5 then sequentially switches the intake and exhaust of the two cylinder chambers based on the movement-to-position signal. For example, when the cylinder piston 11 moves to the left, the reversing trigger device on the left cylinder end cap can send a movement-to-position signal to the reversing valve 5. The reversing valve 5 then... The reversing mechanism connects the first working port A with the first air inlet P, and the second working port B with the second exhaust port R2, to switch the intake of the left cylinder chamber of cylinder 1 and the exhaust of the right cylinder chamber, causing the cylinder piston 11 to move to the right. When the cylinder piston 11 moves to the right, the reversing trigger device on the right cylinder end cover of the cylinder can send a moving-to-position signal to the reversing valve 5. The reversing valve 5 reverses the reversing based on the moving-to-position signal, connecting the second working port B with the first air inlet P, and the first working port A with the first exhaust port R1, to switch the intake of the right cylinder chamber of cylinder 1 and the exhaust of the left cylinder chamber.

[0053] In this embodiment, the auxiliary exhaust valve 7 is connected to the two cylinder chambers respectively. When one cylinder chamber is receiving air and the other cylinder chamber is venting air, the auxiliary exhaust valve 7 connects the other cylinder chamber to the outside world to assist in venting the other cylinder chamber.

[0054] Specifically, the two cylinder chambers are a first chamber 12 located on the left and a second chamber 13 located on the right. An auxiliary exhaust valve 7 is connected to both the first chamber 12 and the second chamber 13. When the first chamber 12 receives air and the second chamber 13 exhausts air, the auxiliary exhaust valve 7 connects the second chamber 13 to the outside to assist in exhausting the second chamber 13, preventing the cylinder piston 11 from jamming due to insufficient intake pressure in the first chamber 12. This is achieved by the auxiliary exhaust valve 7 cooperating with the second working port B of the reversing valve 5 to perform coordinated exhaust on the second chamber 13. Conversely, when the second chamber 13 receives air and the first chamber 12 exhausts air, the auxiliary exhaust valve 7 connects the first chamber 12 to the outside to assist in exhausting the first chamber 12, preventing the cylinder piston 11 from jamming due to insufficient intake pressure in the first chamber 12. When the intake pressure of the second air chamber 13 is insufficient, the first air chamber 12 is vented in coordination with the first working port A of the reversing valve 5 to vent the air. Furthermore, when the cylinder piston 11 is stuck, the auxiliary exhaust valve 7 vents the gas in the first air chamber 12, so that the cylinder piston 11 can move towards the cylinder end cover of the first air chamber 12 under the action of the air pressure in the second air chamber 13, thereby triggering the first reversing trigger device 3, so that the valve core of the reversing valve 5 is reversed, switching to the state of intake in the first air chamber 12 and exhaust in the second air chamber 13, so that the cylinder piston 11 moves to the right. The auxiliary exhaust valve 7 discharges gas from the first air chamber 12 or the second air chamber 13, allowing the cylinder piston 11 to move towards the cylinder end cover on the side of the first air chamber 12 or the second air chamber 13 under the action of the air pressure in the second air chamber 13 or the first air chamber 12. This triggers the reversing trigger device, causing the valve core of the reversing valve 5 to switch to a state where the other cylinder chamber is receiving air and the other cylinder chamber is venting air. Furthermore, when the cylinder piston 11 is stuck, the auxiliary exhaust valve 7 discharges gas from the second air chamber 13, allowing the cylinder piston 11 to move towards the cylinder end cover on the side of the second air chamber 13 under the action of the air pressure in the first air chamber 12. This triggers the second reversing trigger device 4, causing the valve core of the reversing valve 5 to switch to a state where the second air chamber 13 is receiving air and the first air chamber 12 is venting air, causing the cylinder piston 11 to move to the left.

[0055] In this embodiment, when the directional valve core is in the neutral position, allowing air to enter one chamber and not exhausting the other chamber, that is, when the directional valve 5 is not in the correct position, the auxiliary exhaust valve 7 exhausts air from the other cylinder chamber.

[0056] Specifically, when the first air chamber 12 is filled with air and the second air chamber 13 is filled with air, the auxiliary exhaust valve 7 connects the second air chamber 13 to the outside until the second air chamber 13 is filled with air and the first air chamber 12 is filled with air. Therefore, it can be seen that from the moment the reversing valve 5 connects the first working port A with the first intake port P and the second working port B with the second exhaust port R2, until the second working port B connects with the first intake port P and the first working port A connects with the first exhaust port R1, the auxiliary exhaust valve 7 connects the second air chamber 13 to the outside. In particular, when the reversing valve core is in the neutral position, so that the second working port B is just connected to the first intake port P and the first working port A is not connected to the first exhaust port R1, that is, when the second air chamber 13 is intake and the first air chamber 12 is not exhausting, the gas in the second air chamber 13 can be discharged through the auxiliary exhaust valve 7, especially the intake air in the second air chamber 13 can be discharged. The first working port A is not connected to the first exhaust port R1, so that the air pressure in the first air chamber 12 is maintained, so that the cylinder piston 11 can move towards the cylinder end cover of the second air chamber 13 under the action of the air pressure in the first air chamber 12 (e.g., Figure 3 (As shown, it moves to the right), thereby triggering the second reversing trigger device 4, so that the reversing valve 5 is reversed to the correct position. The valve core of the reversing valve 5 is controlled to continue moving to the left to reverse, so as to connect the second working port B with the first air inlet P, and connect the first working port A with the first exhaust port R1, switching to the state where the second air chamber 13 is intake and the first air chamber 12 is exhaust. When the second air chamber 13 is intake and the first air chamber 12 is exhaust, it can continue until the first air chamber 12 is intake and the second air chamber 13 is exhaust. The auxiliary exhaust valve 7 connects the first air chamber 12 with the outside. Therefore, it can be seen that from the moment the reversing valve 5 connects the second working port B with the first intake port P and the first working port A with the first exhaust port R1, until the moment the first working port A connects with the first intake port P and the second working port B connects with the second exhaust port R2, the auxiliary exhaust valve 7 connects the first air chamber 12 to the outside. In particular, when the reversing valve core is in the neutral position, so that the first working port A and the first intake port P are just connected and the second working port B and the second exhaust port R2 are not connected, that is, when the first air chamber 12 is intake and the second air chamber 13 is not exhaust, the gas in the first air chamber 12 can be discharged through the auxiliary exhaust valve 7, especially the intake air in the first air chamber 12 can be discharged. The fact that the second working port B and the second exhaust port R2 are not connected keeps the air pressure in the second air chamber 13, so that the cylinder piston 11 can move towards the cylinder end cover on the side of the first air chamber 12 under the action of the air pressure in the second air chamber 13 (e.g., Figure 4 (as shown, moving to the left), thereby triggering the first reversing trigger device 3, so that the reversing valve 5 is reversed to the position, controlling the valve core of the reversing valve 5 to move to the right to reverse, so as to connect the first working port A and the first air inlet P, and connect the second working port B and the second exhaust port R2, switching to the state of the first air chamber 12 intake and the second air chamber 13 exhaust.

[0057] In this embodiment, the auxiliary exhaust valve 7 is connected to the first air chamber 12 and the second air chamber 13 respectively. When the first air chamber 12 is filled with air and the second air chamber 13 is filled with air, the second air chamber 13 is connected to the outside and the connection between the first air chamber 12 and the outside is cut off. When the second air chamber 13 is filled with air and the first air chamber 12 is filled with air, the first air chamber 12 is connected to the outside and the connection between the second air chamber 13 and the outside is cut off.

[0058] In the first embodiment of the auxiliary exhaust valve 7 in this example, see further. Figures 5 to 6 The auxiliary exhaust valve 7 includes a third working port H, a fourth working port G, and an auxiliary exhaust port S; wherein the third working port H and the fourth working port G are respectively connected to the first air chamber 12 and the second air chamber 13, and the auxiliary exhaust port S is used to assist in exhausting the first air chamber 12 or the second air chamber 13.

[0059] Specifically, when the first air chamber 12 is venting air and the second air chamber 13 is venting air, the fourth working port G is connected to the auxiliary exhaust port S to vent the second air chamber 13 and disconnect the connection between the third working port H and the auxiliary exhaust port S; when the second air chamber 13 is venting air and the first air chamber 12 is venting air, the third working port H is connected to the auxiliary exhaust port S to vent the first air chamber 12 and disconnect the connection between the fourth working port G and the auxiliary exhaust port S. The auxiliary exhaust valve 7 and the reversing valve 5 can be arranged in parallel. The first working port A and the third working port H are respectively connected to the first air chamber 12. Preferably, the first working port A and the third working port H are each connected to the first air chamber 12 through a connecting passage. Of course, the third working port H can also be connected to the pipeline between the first working port A and the first air chamber 12. The fourth working port G and the second working port B are respectively connected to the second air chamber 13. Preferably, the second working port B and the fourth working port G are each connected to the second air chamber 13 through a connecting passage. Of course, the fourth working port G can also be connected to the pipeline between the second working port B and the second air chamber 13. When air enters the first air chamber 12 and exhausts from the second air chamber 13, the fourth working port G connects to the auxiliary exhaust port S, enabling the exhaust of the first air chamber 13 and relieving the air pressure in the second air chamber 13. Simultaneously, the third working port H disconnects from the auxiliary exhaust port S to cut off the exhaust pressure relief of the first air chamber 12. Conversely, when air enters the second air chamber 13 and exhausts from the first air chamber 12, the third working port H connects to the auxiliary exhaust port S, enabling the exhaust of the first air chamber 12 and relieving the air pressure in the first air chamber 12. Simultaneously, the fourth working port G disconnects from the auxiliary exhaust port S to cut off the exhaust pressure relief of the second air chamber 13. In this embodiment, a muffler 8 may be provided at the auxiliary exhaust port S.

[0060] See also Figure 5 and Figure 6The auxiliary exhaust valve 7 includes an auxiliary exhaust valve housing 71 and an auxiliary exhaust valve core 72. The auxiliary exhaust valve housing 71 has an auxiliary exhaust valve cavity 711, a third working port G, a fourth working port H, and an auxiliary exhaust port S. The auxiliary exhaust valve core 72 is slidably disposed within the auxiliary exhaust valve cavity 711, allowing it to slide to a first state and a second state. The third working port G and the fourth working port H are respectively connected to both ends of the auxiliary exhaust valve cavity 711 (e.g., ...). Figure 5 The left and right ends (as shown) are connected to apply force to the auxiliary exhaust valve core 72, causing it to slide to either the first or second state. In the second state, the fourth working port H is connected to the auxiliary exhaust port S, while the connection between the third working port G and the auxiliary exhaust port S is severed. In the first state, the third working port G is connected to the auxiliary exhaust port S, while the connection between the fourth working port H and the auxiliary exhaust port S is severed. When the auxiliary exhaust valve core 72 is in the second state (air intake in the first air chamber 12 and exhaust from the second air chamber 13), it connects the fourth working port H to the auxiliary exhaust port S and severed the connection between the third working port G and the auxiliary exhaust port S. When the auxiliary exhaust valve core 72 is in the first state (air intake in the second air chamber 13 and exhaust from the first air chamber 12), it connects the third working port G to the auxiliary exhaust port S and severed the connection between the fourth working port H and the auxiliary exhaust port S.

[0061] Specifically, the auxiliary exhaust valve housing 71 has an auxiliary exhaust valve chamber 711 inside, and the auxiliary exhaust valve chamber 711 extends along its length (e.g., Figure 5 Arranged along the length direction shown, and with open ends, the left and right open ends of the auxiliary exhaust valve cavity 711 can respectively serve as the third working port G and the fourth working port H. Of course, in other embodiments, the two ends of the auxiliary exhaust valve cavity 711 can also be closed ends. The two ends of the auxiliary exhaust valve cavity 711 are respectively connected to the third working port G and the fourth working port H to allow air to enter and exit the auxiliary exhaust valve cavity 711. The auxiliary exhaust valve core 72 is slidably disposed in the auxiliary exhaust valve cavity 711 so as to control the air pressure at both ends of the auxiliary exhaust valve cavity 711 through the air entry and exit of the third working port G and the fourth working port H, thereby pushing the auxiliary exhaust valve core 72 to slide left and right, so as to slide to... Figure 6 The first state shown or as Figure 5 The second state is shown.

[0062] In this embodiment, the auxiliary exhaust valve housing 71 is provided with a first limiting part 712 and a second limiting part 713, which are used to limit and support the auxiliary exhaust valve core 72 respectively, so that the auxiliary exhaust valve core 72 is in the first state and the second state respectively. Figure 5As shown, when the auxiliary exhaust valve core 72 slides to the right side and presses against the left side wall of the second limiting part 713, the auxiliary exhaust valve core 72 is in the second state, that is, the second limiting part 713 limits and supports the auxiliary exhaust valve core 72 in the second state; as Figure 6 As shown, when the auxiliary exhaust valve core 72 slides to the left side and presses against the right side wall of the first limiting part 712, the auxiliary exhaust valve core 72 is in a first state, that is, the first limiting part 712 limits and supports the auxiliary exhaust valve core 72 in the first state. The first limiting part 712 and the second limiting part 713 can be limiting support plates, with connecting holes on both sides of the limiting support plate. Of course, the first limiting part 712 and the second limiting part 713 can also be other structures, such as limiting springs, etc., and this embodiment does not impose any limitations on them.

[0063] like Figure 3 As shown, when air enters the first air chamber 12 and exits the second air chamber 13, air enters through the third working port G and exits through the fourth working port H, so that air enters and exits at the left and right ends of the auxiliary exhaust valve chamber 711 respectively. Then, under the action of the air pressure at the left end of the auxiliary exhaust valve chamber 711, the auxiliary exhaust valve core 72 is pushed to slide to the right until... Figure 5 The right side wall of the auxiliary exhaust valve core 72 shown abuts against the left side wall of the second limiting part 713. The auxiliary exhaust valve core 72 is in the second state, connecting the fourth working port H with the auxiliary exhaust port S, and cutting off the connection between the third working port G and the auxiliary exhaust port S.

[0064] like Figure 4 As shown, when air enters the second air chamber 13 and exhausts from the first air chamber 12, air enters through the fourth working port H and exhausts from the third working port G, so that the left and right ends of the auxiliary exhaust valve chamber 711 respectively exhaust and enter air. Then, under the air pressure at the right end of the auxiliary exhaust valve chamber 711, the auxiliary exhaust valve core 72 is pushed to slide to the left until... Figure 6 The left side wall of the auxiliary exhaust valve core 72 shown abuts against the right side wall of the first limiting part 712. The auxiliary exhaust valve core 72 is in the first state, connecting the third working port G with the auxiliary exhaust port S, and cutting off the connection between the fourth working port H and the auxiliary exhaust port S.

[0065] See also Figures 5 to 9 The inner wall of the auxiliary exhaust valve housing 71 is provided with a sliding fit protrusion 714 at the middle position of the auxiliary exhaust valve cavity 711, and the auxiliary exhaust valve core 72 is slidably connected to the sliding fit protrusion 714; wherein, the auxiliary exhaust port S is opened on the sliding fit protrusion 714.

[0066] Specifically, the inner wall of the auxiliary exhaust valve housing 71 has a sliding engagement protrusion 714 at the middle position. The sliding engagement protrusion 714 can be arranged around the entire circumference of the inner wall of the auxiliary exhaust valve housing 71. The sliding engagement protrusion 714 is adapted to the outer diameter of the auxiliary exhaust valve core 72. The inner wall of the sliding engagement protrusion 714 and the outer wall of the auxiliary exhaust valve core 72 are slidably connected, which can guide the sliding of the auxiliary exhaust valve core 72. In this embodiment, the inner wall of the sliding engagement protrusion 714 and the outer wall of the auxiliary exhaust valve core 72 are clearance-fitted to ensure the smooth switching of the auxiliary exhaust valve core 72. Of course, other matching methods can also be used between the two, and no limitation is made in this embodiment. The setting of the sliding engagement protrusion 714 makes the auxiliary exhaust valve cavity 711 move from one end to the other as... Figure 5 The diagram shows a first large-diameter exhaust chamber 7111, a small-diameter exhaust chamber 7112, and a second large-diameter exhaust chamber 7113 connected from left to right. The diameters of the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113 are the same and larger than the diameter of the small-diameter exhaust chamber 7112. The first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113 are connected to the third working port G and the fourth working port H, respectively, allowing for air intake and exhaust within the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113, thereby driving the auxiliary exhaust valve core 72 to slide left and right. The auxiliary exhaust valve housing 71 and the sliding engagement protrusion 714 are an integral structure. The auxiliary exhaust port S is opened on the sliding engagement protrusion 714, and one end (e.g., Figure 5 The bottom end shown is connected to the small-diameter exhaust chamber 7112, and the other end (as shown) is connected to the small-diameter exhaust chamber 7112. Figure 5 The top (as shown) is an open end, which can connect with the outside world.

[0067] See also Figures 5 to 8 The auxiliary exhaust valve core 72 is provided with a connecting channel 721. When the auxiliary exhaust valve core 72 is in the second state, the connecting channel 721 is at least partially located between the fourth working port H and the auxiliary exhaust port S, connecting the fourth working port H and the auxiliary exhaust port S to form a second auxiliary exhaust passage. When the auxiliary exhaust valve core 72 is in the first state, the connecting channel 721 is at least partially located between the third working port G and the auxiliary exhaust port S, connecting the third working port G and the auxiliary exhaust port S to form a first auxiliary exhaust passage.

[0068] Specifically, in this embodiment, the auxiliary exhaust valve core 72 has a circumferential notch around its entire outer periphery at the middle position, serving as a connecting channel 721. This allows the auxiliary exhaust valve core 72 to sequentially form a first large-diameter valve core 722, a small-diameter valve core 723, and a second large-diameter valve core 723 from one end to the other. The outer diameters of the first large-diameter valve core 722 and the second large-diameter valve core 723 are the same and larger than the outer diameter of the small-diameter valve core 723. In particular, the outer diameters of the first large-diameter valve core 722 and the second large-diameter valve core 723 are adapted to the diameter of the small-diameter exhaust chamber 7112. That is, the outer walls of the first large-diameter valve core 722 and the second large-diameter valve core 723 can be slidably connected with the sliding engagement protrusion 714. A circumferential channel can be formed between the outer wall of the small-diameter valve core 723 and the inner wall of the sliding engagement protrusion 714, enabling communication between the third working port G and the auxiliary exhaust port S, or between the fourth working port H and the auxiliary exhaust port S. In this embodiment, the length of the connecting channel 721 (e.g., Figure 5 The length shown in the horizontal direction, i.e., the length of the small-diameter valve core 723, can be less than or equal to the length of the sliding fit protrusion 714 (e.g., the length in the horizontal direction shown). Figure 5 (as shown in the horizontal direction length), to ensure that the small-diameter valve core 723 slides towards the first large-diameter exhaust chamber 7111 until the auxiliary exhaust valve core 72 is in the first state, such as Figure 6 As shown, the first large-diameter exhaust chamber 7111 is connected to the small-diameter valve core 723, forming a first auxiliary exhaust channel. Simultaneously, the second large-diameter valve core 723 is at least partially positioned at the small-diameter exhaust chamber 7112 to cut off the connection between the small-diameter exhaust chamber 7112 and the second large-diameter exhaust chamber 7113. When the auxiliary exhaust valve core 72 is in the second state, as... Figure 5 As shown, the small-diameter exhaust chamber 7112 is connected to the second large-diameter exhaust chamber 7113 to form a second auxiliary exhaust channel. At the same time, the first large-diameter valve core 721 is at least partially placed in the small-diameter exhaust chamber 7112 to cut off the connection between the first large-diameter exhaust chamber 7111 and the small-diameter valve core 723.

[0069] Of course, in other embodiments, the connecting channel 721 may also have other structures, and no limitation is made on it in this embodiment. Of course, the connecting channel 721 may also be provided on the auxiliary exhaust valve housing 71, and the switching of intake and exhaust of the third working port G and the fourth working port H can be realized through the relative sliding of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71.

[0070] See also Figures 5 to 8To prevent gas leakage when the first and second auxiliary exhaust passages are cut off, preferably, the auxiliary exhaust valve core 72 is fitted with a first sealing ring 73 and a second sealing ring 74. When the auxiliary exhaust valve core 72 is in the first state, the second sealing ring 74 is located between the fourth working port H and the auxiliary exhaust port S, cutting off the second auxiliary exhaust passage; when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located between the third working port G and the auxiliary exhaust port S, cutting off the first auxiliary exhaust passage.

[0071] Specifically, when the auxiliary exhaust valve core 72 is in the first state, the second sealing ring 74 is located in the circumferential hole between the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71, forming an internal seal; when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located in the circumferential hole between the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71, forming an internal seal. The first sealing ring 73 and the second sealing ring 74 are respectively fitted onto the first large-diameter valve core 722 and the second large-diameter valve core 723, and the first sealing ring 73 and the second sealing ring 74 can be adapted to the inner wall of the small-diameter exhaust chamber 7112.

[0072] like Figure 5 As shown, when the auxiliary exhaust valve core 72 is in the second state, as Figure 7 As shown, the first sealing ring 73 is located inside the small-diameter exhaust chamber 7112 and positioned to the left of the auxiliary exhaust port S. Its outer wall presses against the inner wall of the left side section of the sliding fit protrusion 714, which is located to the left of the auxiliary exhaust port S, thus sealing the hole and cutting off the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, i.e., cutting off the connection between the first large-diameter exhaust chamber 7111 and the small-diameter exhaust chamber 7112. This also cuts off the connection between the auxiliary exhaust port S and the first large-diameter exhaust chamber 7111, i.e., cutting off the connection between the auxiliary exhaust port S and the third working port G. Simultaneously, as... Figure 8 As shown, the second sealing ring 74 is disposed in the second large-diameter exhaust chamber 7113, that is, there is a gap between the second sealing ring 74 and the inner wall of the second large-diameter exhaust chamber 7113. The connecting channel 721 is partially located in the second large-diameter exhaust chamber 71131 and partially located in the small-diameter exhaust chamber 7112, thereby realizing the connection between the second large-diameter exhaust chamber 7113 and the small-diameter exhaust chamber 7112, and thus realizing the connection between the auxiliary exhaust port S and the second large-diameter exhaust chamber 7113, that is, realizing the connection between the auxiliary exhaust port S and the fourth working port H.

[0073] Similarly, such as Figure 6As shown, when the auxiliary exhaust valve core 72 is in the first state, the first sealing ring 73 is disposed in the first large-diameter exhaust chamber 7111, that is, there is a gap between the first sealing ring 73 and the first large-diameter exhaust chamber 7111. The connecting channel 721 is partially located in the first large-diameter exhaust chamber 7111 and partially located in the small-diameter exhaust chamber 7112, realizing the connection between the first large-diameter exhaust chamber 7111 and the small-diameter exhaust chamber 7112. At the same time, the second sealing ring 74 is located in the small-diameter exhaust chamber 7112 and is placed on the right side of the auxiliary exhaust port S. The outer wall abuts against the inner wall of the right side section of the sliding fit protrusion 714 placed on the right side of the auxiliary exhaust port S, performing an internal seal, cutting off the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, thereby cutting off the connection between the auxiliary exhaust port S and the second large-diameter exhaust chamber 7113, that is, cutting off the connection between the auxiliary exhaust port S and the fourth working port H.

[0074] In the second embodiment of the auxiliary exhaust valve 7 in this example, as Figures 9 to 13 The difference between this embodiment and the first embodiment lies in the length of the connecting channel 721 relative to the sliding engagement protrusion 714 and the connection method between the connecting channel 721 and the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113. Specifically, the connecting channel 721 is always located only within the small-diameter exhaust chamber 7112 and is connected to the auxiliary exhaust port S, i.e., the connecting channel 721 is connected to the auxiliary exhaust port S. Furthermore, the connecting channel 721 is disconnected from the third working port G and the fourth working port H. The auxiliary exhaust valve core 72 has valves on both sides of the connecting channel 721 (e.g., ...). Figure 9The left and right sides (as shown) are respectively provided with a first connecting groove 725 and a second connecting groove 726, and both the first connecting groove 725 and the second connecting groove 726 are connected to the connecting channel 721. When the auxiliary exhaust valve core 72 is in the first state, the first connecting groove 725 connects the connecting channel 721 and the third working port G. When the auxiliary exhaust valve core 72 is in the second state, the second connecting groove 726 connects the connecting channel 721 and the fourth working port H. Specifically, the first connecting groove 725 is disposed between the connecting channel 721 and the first sealing ring 73, and the second connecting groove 726 is disposed between the connecting channel 721 and the second sealing ring 74. The first connecting groove 725 and the second connecting groove 726 are respectively disposed on the first large-diameter valve core 721 and the second large-diameter valve core 723. There can be multiple first connecting grooves 725 and second connecting grooves 726, and they are evenly arranged along the circumference of the first large-diameter valve core 721 and the second large-diameter valve core 723. In this embodiment, four are used as an example for illustration, but other numbers can be used, and no limitation is made on them in this embodiment. In this embodiment, there can be multiple auxiliary exhaust ports S, which are evenly arranged along the circumference of the auxiliary exhaust valve housing 71. The two ends of each auxiliary exhaust port S are connected to the outside and the small-diameter exhaust chamber 7112, respectively. In this embodiment, four are used as an example, but other numbers can be used. No limitation is made on them in this embodiment.

[0075] In this embodiment, the arrangement of the first connecting groove 725 and the second connecting groove 726 makes the reversing sliding smoother and ensures the balance and stability of each cavity.

[0076] like Figure 9 As shown, when the auxiliary exhaust valve core 72 is in the first state, part of the first connecting groove 725 is located in the first large-diameter exhaust chamber 7111, and the other part is located in the small-diameter exhaust chamber 7112, realizing the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, thereby realizing the connection between the third working port G and each auxiliary exhaust port S. At the same time, the second connecting groove 726 and the second sealing ring 74 are both set in the small-diameter exhaust chamber 7112, cutting off the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, thereby cutting off the connection between the fourth working port H and each auxiliary exhaust port S.

[0077] like Figure 10 As shown, when the auxiliary exhaust valve core 72 is in the second state, part of the second connecting groove 726 is located in the second large-diameter exhaust chamber 7113, and the other part is located in the small-diameter exhaust chamber 7112, realizing the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, thereby realizing the connection between the fourth working port H and each auxiliary exhaust port S. At the same time, the first connecting groove 725 and the first sealing ring 73 are both set in the small-diameter exhaust chamber 7112, cutting off the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, thereby cutting off the connection between the third working port G and each auxiliary exhaust port S.

[0078] In this embodiment, the auxiliary exhaust valve 7 has the same structure and principle as the auxiliary exhaust valve 7 in the first embodiment, and the two can be referenced from each other.

[0079] In the third embodiment of the auxiliary exhaust valve 7 in this example, as Figure 14 and Figure 15 The difference between this embodiment and the second embodiment is that the sealing method of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71 is different, and the limiting method of the auxiliary exhaust valve core 72 is also different.

[0080] In this embodiment, the auxiliary exhaust valve core 72 is provided with a first end face sealing structure 727 and a second end face sealing structure 728 at both ends, respectively. A first sealing ring 73 is disposed between the auxiliary exhaust valve core 72 and the first end face sealing structure 727, and a second sealing ring 74 is disposed between the auxiliary exhaust valve core 72 and the second end face sealing structure 728. Specifically, the first end face sealing structure 727 and the second end face sealing structure 728 can be large end face structures at both ends, which can achieve limiting. At the same time, the first end face sealing structure 727, the second end face sealing structure 728 and the auxiliary exhaust valve core 72 can be a three-section split structure.

[0081] See also Figure 14 and Figure 15 The auxiliary exhaust valve housing 71 has a first step structure 715 and a second step structure 716 inside the auxiliary exhaust valve cavity 711. The first step structure 715 and the second step structure 716 correspond to and are adapted to the first end face sealing structure 727 and the second end face sealing structure 728, respectively.

[0082] like Figure 14 As shown, when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located between the first stepped structure 715 and the first end face sealing structure 727, forming an end face seal to seal the gap between the first stepped structure 715 and the first end face sealing structure 727, further preventing the flow of gas in the first auxiliary exhaust passage, that is, preventing the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, and thus preventing the connection between the third working port G and each auxiliary exhaust port S. Figure 15 As shown, when the auxiliary exhaust valve core is in the first state, the second sealing ring 74 is located between the second step structure 716 and the second end face sealing structure 728, forming an end face seal to seal the gap between the second step structure 716 and the second end face sealing structure 728, further preventing the flow of gas in the second auxiliary exhaust passage, that is, preventing the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, and thus preventing the connection between the fourth working port H and each auxiliary exhaust port S.

[0083] In this embodiment, the first step structure 715 and the first end face sealing structure 727 press against each other, and the second step structure 716 and the second end face sealing structure 728 press against each other to limit the position of the auxiliary exhaust valve core 72.

[0084] In the fourth embodiment of the auxiliary exhaust valve 7 in this example, as Figure 16 and Figure 17 The difference between this embodiment and the second embodiment is that the sealing method of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71 is different, and the limiting method of the auxiliary exhaust valve core 72 is also different.

[0085] In this embodiment, the auxiliary exhaust valve core 72 is provided with a first inclined sealing structure 729 and a second inclined sealing structure 7210 at both ends, a first sealing ring 73 is disposed between the auxiliary exhaust valve core 72 and the first inclined sealing structure 729, and a second sealing ring 74 is disposed between the auxiliary exhaust valve core 72 and the second inclined sealing structure 7210. The auxiliary exhaust valve housing 71 is provided with a first inclined support structure 717 and a second inclined support structure 718 inside the auxiliary exhaust valve cavity 711. The first inclined support structure 717 and the second inclined support structure 718 correspond to the first inclined sealing structure 729 and the second inclined sealing structure 7210, respectively.

[0086] like Figure 16 As shown, when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 presses against the first inclined sealing structure 729 to form an inclined seal, thereby sealing the gap between the first inclined support structure 717 and the first inclined sealing structure 729, further preventing the flow of gas in the first auxiliary exhaust passage, that is, preventing the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, and thus preventing the connection between the third working port G and each auxiliary exhaust port S. Figure 17 As shown, when the auxiliary exhaust valve core is in the first state, the second sealing ring 74 presses against the second inclined sealing structure 7210 to form an inclined sealing to seal the gap between the second inclined support structure 718 and the second inclined sealing structure 7210, further preventing the flow of gas in the second auxiliary exhaust passage, that is, preventing the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, and thus preventing the connection between the fourth working port H and each auxiliary exhaust port S.

[0087] In this embodiment, the first inclined surface support structure 717 and the first inclined surface sealing structure 729 press against each other, and the second inclined surface support structure 718 and the second inclined surface sealing structure 7210 press against each other to limit the position of the auxiliary exhaust valve core 72.

[0088] In summary, the auxiliary exhaust valve and pneumatic hydraulic station with the auxiliary exhaust valve provided in this embodiment can switch between two states through the auxiliary exhaust valve 7 connected to the two cylinder chambers. In the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off to assist in exhausting the first air chamber 12, so as to avoid the cylinder piston 11 from getting stuck. It can also exhaust the gas entering the first air chamber 12 when the reversing valve is not in the neutral position, so that the first air chamber 12 is filled with air and the second air chamber 13 is not exhausted. This allows the cylinder piston to move towards the cylinder end cover on the side of the first air chamber 12 under the action of the air pressure in the second air chamber 13, thereby triggering the reversing trigger device to make the reversing valve reversing in place, controlling the reversing valve 5 to reversing until the corresponding exhaust port and air inlet are connected, switching to the state where the first air chamber 12 is filled with air and the second air chamber 13 is exhausted, avoiding the cylinder piston from stopping and causing no more hydraulic output, that is, avoiding the cylinder... In the second state, the fourth working port and the auxiliary exhaust port are connected, while the third working port and the auxiliary exhaust port are disconnected. This allows for auxiliary exhaust of the second air chamber 13, preventing the cylinder piston 11 from jamming. It also allows for the discharge of gas entering the second air chamber 13 when the reversing valve is not fully switched (i.e., in the neutral position) and the first air chamber 12 is not being exhausted. This allows the cylinder piston to move towards the cylinder end cap of the first air chamber 12 under the pressure of the air in the first air chamber 12, triggering the reversing trigger device to switch the reversing valve to the correct position. This controls the reversing valve 5 to switch until the corresponding exhaust port and intake port are connected, switching to a state where the first air chamber 12 is receiving gas and the second air chamber 13 is venting gas. This prevents the cylinder piston from stopping and jamming, thus avoiding the loss of hydraulic pressure and preventing phenomena such as cylinder jamming, tool loss, and workpiece not being clamped properly, or tool collision.

[0089] 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.

[0090] 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.

[0091] 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. An auxiliary exhaust valve, characterized in that, Includes auxiliary exhaust valve housing and auxiliary exhaust valve core; wherein, The auxiliary exhaust valve housing is provided with an auxiliary exhaust valve cavity, a third working port, a fourth working port, and an auxiliary exhaust port; the auxiliary exhaust valve core is slidably disposed in the auxiliary exhaust valve cavity, so as to slide to a first state or a second state; The third working port and the fourth working port are respectively connected to both ends of the auxiliary exhaust valve chamber, and are used to apply force to the auxiliary exhaust valve core so that the auxiliary exhaust valve core slides to a first state or a second state: in the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off; in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off.

2. An auxiliary exhaust valve according to claim 1, characterized in that, The auxiliary exhaust valve core or the auxiliary exhaust valve housing is provided with a connecting channel; when the auxiliary exhaust valve core is in the second state, the connecting channel is at least partially located between the fourth working port and the auxiliary exhaust port, connecting the fourth working port and the auxiliary exhaust port to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core is in the first state, the connecting channel is at least partially located between the third working port and the auxiliary exhaust port, connecting the third working port and the auxiliary exhaust port to form a first auxiliary exhaust passage.

3. An auxiliary exhaust valve according to claim 2, characterized in that, The auxiliary exhaust valve core is fitted with a first sealing ring and a second sealing ring. When the auxiliary exhaust valve core is in the first state, the second sealing ring is located between the fourth working port and the auxiliary exhaust port, cutting off the second auxiliary exhaust passage. When the auxiliary exhaust valve core is in the second state, the first sealing ring is located between the third working port and the auxiliary exhaust port, cutting off the first auxiliary exhaust passage.

4. An auxiliary exhaust valve according to claim 3, characterized in that, A circumferential orifice is provided between the auxiliary exhaust valve core and the auxiliary exhaust valve housing. The second sealing ring is used to be located in the circumferential orifice between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in the first state, forming an internal seal. The first sealing ring is used to be located in the circumferential orifice between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in the second state, forming an internal seal.

5. An auxiliary exhaust valve according to claim 3, characterized in that, The auxiliary exhaust valve core is provided with a first end face sealing structure and a second end face sealing structure at both ends. The first sealing ring is disposed between the auxiliary exhaust valve core and the first end face sealing structure, and the second sealing ring is disposed between the auxiliary exhaust valve core and the second end face sealing structure.

6. An auxiliary exhaust valve according to claim 5, characterized in that, The auxiliary exhaust valve housing has a first step structure and a second step structure inside the auxiliary exhaust valve cavity. The first step structure and the second step structure correspond to the first end face sealing structure and the second end face sealing structure, respectively. The second sealing ring is used when the auxiliary exhaust valve core is in the first state, and is located between the second step structure and the second end face sealing structure to form an end face seal to seal the gap between the second step structure and the second end face sealing structure. The first sealing ring is used when the auxiliary exhaust valve core is in the second state, and is located between the first step structure and the first end face sealing structure to form an end face seal to seal the gap between the first step structure and the first end face sealing structure.

7. An auxiliary exhaust valve according to claim 3, characterized in that, The auxiliary exhaust valve core is provided with a first inclined sealing structure and a second inclined sealing structure at both ends, the first sealing ring is disposed between the auxiliary exhaust valve core and the first inclined sealing structure, and the second sealing ring is disposed between the auxiliary exhaust valve core and the second inclined sealing structure. The auxiliary exhaust valve housing has a first inclined support structure and a second inclined support structure inside the auxiliary exhaust valve cavity. The first inclined support structure and the second inclined support structure correspond to the first inclined sealing structure and the second inclined sealing structure, respectively. The second sealing ring is used to press against the second inclined sealing structure when the auxiliary exhaust valve core is in the first state, forming an inclined seal to seal the gap between the second inclined sealing structure and the second inclined support structure. The first sealing ring is used to press against the first inclined sealing structure when the auxiliary exhaust valve core is in the second state, forming an inclined seal to seal the gap between the first inclined sealing structure and the first inclined support structure.

8. An auxiliary exhaust valve according to any one of claims 1 to 7, characterized in that, The auxiliary exhaust valve housing has a sliding engagement protrusion at the middle position of the auxiliary exhaust valve cavity, and the auxiliary exhaust valve core is slidably connected to the sliding engagement protrusion; the auxiliary exhaust port is opened on the sliding engagement protrusion.

9. An auxiliary exhaust valve according to any one of claims 1 to 7, characterized in that, The auxiliary exhaust valve housing is provided with a first limiting part and a second limiting part, which are used to limit and support the auxiliary exhaust valve core respectively, so that the auxiliary exhaust valve core is in the first state and the second state respectively.

10. A pneumatic hydraulic power unit, comprising a cylinder and an auxiliary exhaust valve as described in any one of claims 1 to 9, wherein a third working port of the auxiliary exhaust valve is connected to a first air chamber of the cylinder, and a fourth working port of the auxiliary exhaust valve is connected to a second air chamber of the cylinder.

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