A pneumatic hydraulic pump body and a hydraulic station with the same

Abstract

The utility model discloses a kind of pneumatic hydraulic pump body, including hydraulic cylinder, the inner circumferential wall of hydraulic cylinder is slidably sealed and is arranged in two hydraulic chambers in the hydraulic cylinder and is separated by hydraulic piston, the hydraulic pump head of the one end of closed hydraulic cylinder, the hydraulic end plate of the other end of closed hydraulic cylinder and the piston rod of the piston rod that passes through hydraulic end plate and connects hydraulic piston, inlet is equipped on hydraulic pump head, inlet is connected with outside one hydraulic chamber, inlet is equipped with inlet check valve. Hydraulic end plate is arranged in the upper end of hydraulic cylinder, outlet is equipped on hydraulic end plate, outlet is connected with outside another hydraulic chamber, the lower end of piston rod is equipped with outlet check valve, outlet check valve makes two hydraulic chambers communicate when piston rod moves downward, when piston rod moves upward, two hydraulic chambers are cut off communication. The utility model makes the hydraulic pump head of pneumatic hydraulic pump body be set below mounting surface, the outlet of pneumatic hydraulic pump body is set above mounting surface, and the connection of outlet pipeline is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic power units, and in particular to a pneumatic hydraulic pump body and a hydraulic power unit having the pneumatic hydraulic pump body. 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] In existing hydraulic power units, the hydraulic cylinder outlet is located at the hydraulic pump head. This means that when the hydraulic pump head is installed below the mounting surface (such as the ground), the hydraulic cylinder outlet is also installed below the mounting surface, making the connection of the outlet pipeline inconvenient. Utility Model Content

[0004] This utility model provides a pneumatic hydraulic pump body and a hydraulic station having the pneumatic hydraulic pump body, which enables the hydraulic pump head of the pneumatic hydraulic pump body to be set below the mounting surface, while the liquid outlet of the pneumatic hydraulic pump body is set above the mounting surface.

[0005] This utility model provides a pneumatic hydraulic pump body, including a hydraulic cylinder, a hydraulic piston that is slidably sealed to the inner circumferential wall of the hydraulic cylinder and divides the hydraulic cylinder into two hydraulic chambers, a hydraulic pump head that seals one end of the hydraulic cylinder, a hydraulic end plate that seals the other end of the hydraulic cylinder, and a piston rod that passes through the hydraulic end plate and connects to the hydraulic piston. The hydraulic pump head has an inlet port that connects one hydraulic chamber to the outside, and an inlet check valve is provided at the inlet port. The hydraulic end plate is located at the upper end of the hydraulic cylinder and has an outlet port that connects the other hydraulic chamber to the outside. An outlet check valve is provided at the lower end of the piston rod. The outlet check valve connects the two hydraulic chambers when the piston rod moves downward and disconnects the connection when the piston rod moves upward.

[0006] In some embodiments, the lower part of the hydraulic end plate has a mounting surface, which is disposed on the outer periphery of the hydraulic cylinder. The end of the outlet that communicates with the outside is disposed above the mounting surface.

[0007] In some embodiments, a first protrusion is provided on the inner peripheral wall of the inlet. The inlet check valve includes a first sealing head, a baffle, and a first spring. The first sealing head is disposed inside the inlet and makes sealing contact with the first protrusion. The baffle covers one end of the inlet near the inside of the hydraulic cylinder and has a liquid passage hole. The first spring is supported between the first sealing head and the baffle.

[0008] In some embodiments, there are multiple liquid passage holes, with one liquid passage hole located on the center line of the liquid inlet, and the remaining liquid passage holes evenly arranged around the one liquid passage hole.

[0009] In some embodiments, the inner peripheral wall of the inlet is provided with a fluid passage groove at one end near the inside of the hydraulic cylinder.

[0010] In some embodiments, the lower end of the piston rod has a recess, and the side wall of the recess has a connecting port that connects the recess to another hydraulic chamber. The discharge check valve includes a second sealing head, a second spring, and a valve block. The second sealing head is disposed within the recess, the second spring is supported between the second sealing head and the bottom wall of the recess, and the valve block is encapsulated at the open end of the recess. The valve block has a through hole that connects the recess to a hydraulic chamber, and the outer peripheral surface of the through hole is in sealing contact with the second sealing head.

[0011] In some embodiments, the valve block has a first mounting section and a second mounting section arranged along the centerline of the through hole. The first mounting section is disposed inside the cavity, and the second mounting section is disposed outside the cavity. A second protrusion is provided on the outer peripheral wall of the second mounting section, and the second protrusion is connected to the outer peripheral surface of the opening end.

[0012] In some embodiments, a first sealing ring is provided on the side of the second protrusion near the opening end, and the first sealing ring is in sealing contact with the outer peripheral surface of the opening end.

[0013] In some embodiments, the second protrusion is screwed to the outer peripheral surface of the opening end.

[0014] In some embodiments, the hydraulic piston has a through hole, and the piston rod passes through the through hole. At least two second sealing rings are provided on the outer peripheral wall of the piston rod, each second sealing ring being arranged along the length of the piston rod, and each second sealing ring making sealing contact with the inner peripheral wall of the through hole.

[0015] An embodiment of this utility model also provides a hydraulic station, including the above-mentioned pneumatic hydraulic pump body and cylinder, wherein the piston rod of the pneumatic hydraulic pump body is connected to the cylinder piston.

[0016] A pneumatic hydraulic pump body according to an embodiment of this utility model includes a hydraulic cylinder, a hydraulic piston that is slidably sealed to the inner circumferential wall of the hydraulic cylinder and divides the hydraulic cylinder into two hydraulic chambers, a hydraulic pump head that seals one end of the hydraulic cylinder, a hydraulic end plate that seals the other end of the hydraulic cylinder, and a piston rod that passes through the hydraulic end plate and connects to the hydraulic piston. The hydraulic pump head has an inlet port that connects one hydraulic chamber to the outside, and an inlet check valve is provided at the inlet port. The hydraulic end plate is located at the upper end of the hydraulic cylinder and has an outlet port that connects the other hydraulic chamber to the outside. An outlet check valve is provided at the lower end of the piston rod. The outlet check valve connects the two hydraulic chambers when the piston rod moves downward and disconnects the connection when the piston rod moves upward. This pneumatic hydraulic pump body allows the hydraulic pump head to be positioned below the mounting surface, while the outlet port is positioned above the mounting surface, thus facilitating the connection of the outlet pipeline. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the upper part of the pneumatic hydraulic pump body driven by a cylinder in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the lower part of the pneumatic hydraulic pump body driven by a cylinder in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the baffle in an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the baffle in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the valve block in an embodiment of the present utility model;

[0023] Figure 6 This is a cross-sectional schematic diagram of the valve block in an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the upper part of the hydraulic station in an embodiment of this utility model;

[0025] Figure 8 This is a schematic diagram of the lower part of the hydraulic station in an embodiment of this utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the first mounting plate in an embodiment of the present utility model;

[0027] Figure 10 This is a cross-sectional schematic diagram of the cylinder body in an embodiment of the present utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] See Figure 1-6This utility model provides a pneumatic hydraulic pump body 5. The pneumatic hydraulic pump body 5 includes a hydraulic cylinder 501, a hydraulic piston 502, a hydraulic pump head 503, a hydraulic end plate 104, and a piston rod 504. The axis of the hydraulic cylinder 501 extends vertically. The hydraulic piston 502 is slidably sealed to the inner peripheral wall of the hydraulic cylinder 501, creating two hydraulic chambers within the hydraulic cylinder 501. The hydraulic pump head 503 closes the lower end of the hydraulic cylinder 501. The hydraulic end plate 104 closes the upper end of the hydraulic cylinder 501. The piston rod 504 passes through the hydraulic end plate 104 and connects to the hydraulic piston 502.

[0030] The hydraulic pump head 502 is provided with an inlet 505, which connects the hydraulic chamber on the lower side of the hydraulic piston 502 to the outside. An inlet check valve 506 is provided at the inlet 505.

[0031] Specifically, a first protrusion 5051 is provided on the inner peripheral wall of the liquid inlet 505. Under the above conditions, the liquid inlet check valve 506 includes a first sealing head 5063, a first spring 5062, and a baffle 5061.

[0032] The first sealing head 5063 is disposed inside the liquid inlet 505 and makes sealing contact with the first protrusion 5051. The first sealing head 5063 has a spherical structure. Further, the first protrusion 5051 has an arc surface, which makes sealing contact with the first sealing head 5063.

[0033] A baffle 5061 is installed on one end of the inlet 505 near the inside of the hydraulic cylinder 501, and the baffle 5061 is provided with a liquid passage hole 5064. There are multiple liquid passage holes 5064, with one hole 5064 located on the center line of the inlet 505, and the remaining holes 5064 evenly arranged around it. Furthermore, a liquid passage groove 5052 is provided on the inner peripheral wall of the inlet 505 near the inside of the hydraulic cylinder 501 to ensure flow rate.

[0034] The first spring 5062 is supported between the first sealing head 5063 and the baffle 5061. Further, the baffle 5061 between one fluid passage 5064 and the other fluid passages 5064 supports the first spring 5062. A boss 5065 is provided on the side of the baffle 5061 near the hydraulic pump head 502, and the first spring 5062 is sleeved around the outer periphery of the boss 5065. The boss 5065 surrounds one fluid passage 5064.

[0035] Furthermore, a suction filter 509 is provided at the end of the inlet 505 that is away from the hydraulic cylinder 501.

[0036] The hydraulic end plate 104 is provided with an outlet 507, which connects the hydraulic chamber on the upper side of the hydraulic piston 502 to the outside. A steel outlet pipe seat is provided at the outlet 507 to prevent damage to the connecting threads when disassembling the outlet pipe during use. The lower part of the hydraulic end plate 104 has a mounting surface, which is located on the outer periphery of the hydraulic cylinder 501 for easy installation, such as mounting on an oil tank. The end of the outlet 507 that communicates with the outside is located above the mounting surface. A one-way valve 508 is provided at the lower end of the piston rod 504. The one-way valve 508 connects the two hydraulic chambers when the piston rod 504 moves downwards and disconnects the connection when the piston rod 504 moves upwards.

[0037] Specifically, the lower end of the piston rod 504 is provided with a cavity 5041, and the side wall of the cavity 5041 is provided with a connecting port 5042, which connects the cavity 5041 with the hydraulic chamber on the upper side of the hydraulic piston 502. Under the above conditions, the liquid outlet check valve 508 includes a second sealing head 5083, a second spring 5082, and a valve block 5081.

[0038] The second sealing head 5083 is disposed within the cavity 5041. The second sealing head 5083 has a spherical structure.

[0039] The second spring 5082 is supported between the second sealing head 5083 and the bottom wall of the cavity 5041.

[0040] A valve block 5081 is encapsulated in the open end of a cavity 5041. The valve block 5081 has a through hole 5087, which connects the cavity 5041 to the hydraulic chamber below the hydraulic piston 502. The outer peripheral surface of the through hole 5087 is in sealing contact with the second sealing head 5083. The outer peripheral surface of the through hole 5087 has an arc surface, which is in sealing contact with the second sealing head 5083. The valve block 5081 has a first mounting section 5088 and a second mounting section 5089 arranged along the centerline of the through hole. The first mounting section 5088 is located inside the cavity 5041, and the second mounting section 5089 is located outside the cavity 5041. A second protrusion 5084 is provided on the outer peripheral wall of the second mounting section, and the second protrusion 5084 is connected to the outer peripheral surface of the open end. A first sealing ring 5085 is provided on the side of the second protrusion 5084 near the open end, and the first sealing ring 5085 is in sealing contact with the outer peripheral surface of the open end. The second protrusion 5084 is provided with a mounting hole 5086, and a screw is inserted into the mounting hole 5086 so that the second protrusion 5084 is connected to the outer peripheral surface of the opening end by the screw.

[0041] In addition, the hydraulic piston 502 is provided with a through hole, and the piston rod 504 passes through the through hole. At least two second sealing rings 5043 are provided on the outer peripheral wall of the piston rod 504. Each second sealing ring 5043 is arranged along the length direction of the piston rod 504, and each second sealing ring 5043 is in sealing contact with the inner peripheral wall of the through hole.

[0042] In this invention, when the hydraulic piston 502 moves upward, the inlet check valve 506 in the hydraulic pump head 503 opens, and hydraulic oil is drawn into the lower hydraulic chamber of the hydraulic piston 502 through the suction filter 509. Meanwhile, the outlet check valve 508 in the piston rod 504 closes. When the hydraulic piston 502 moves downward, the inlet check valve 506 in the hydraulic pump head 503 closes, and the outlet check valve 508 in the piston rod 504 opens, forcing the hydraulic oil drawn into the lower hydraulic chamber of the hydraulic piston 502 into the upper hydraulic chamber. When the hydraulic piston 502 moves upward again, the inlet check valve 506 in the hydraulic pump head 503 opens, and hydraulic oil is drawn into the lower hydraulic chamber of the hydraulic piston 502 through the suction filter 509. The outlet check valve 508 in the piston rod 504 closes, and the piston rod 504 expels the hydraulic oil from the upper hydraulic chamber of the hydraulic piston 502. This oil is then connected to the hydraulic accumulator and hydraulic unit via a hydraulic connector.

[0043] See Figure 7-10 An embodiment of this utility model provides a hydraulic station, including the aforementioned pneumatic hydraulic pump body and cylinder, wherein the piston rod of the pneumatic hydraulic pump body is connected to the cylinder piston. The hydraulic station also includes a reversing trigger structure capable of issuing a signal that the cylinder piston 102 of cylinder 1 has moved to the position, and a reversing valve structure 4 that switches the intake and exhaust of the two cylinder chambers of cylinder 1 according to the signal from the reversing trigger structure.

[0044] Cylinder 1 has a cylinder body 101, a cylinder piston 102, and a first cylinder end plate 103. The axis of the cylinder body 101 extends vertically. The cylinder piston 102 is slidably sealed to the inner circumferential wall of the cylinder body 101, separating two cylinder chambers within the cylinder body 101. The first cylinder end plate 103 closes the upper end of the cylinder body 101. The hydraulic end plate 104 closes the lower end of the cylinder body 101. Under the above conditions, when air enters the upper cylinder chamber of the cylinder piston 102, air exits the lower cylinder chamber, and vice versa, so that the cylinder piston 102 slides up and down under air pressure, and the hydraulic piston 502 slides up and down under the action of the cylinder piston 102.

[0045] There are two reversing trigger structures, namely the first reversing trigger structure 2 and the second reversing trigger structure 3. The first reversing trigger structure 2 and the second reversing trigger structure 3 are respectively installed on the first cylinder end plate 103 and the hydraulic end plate 104, so as to obtain whether the cylinder piston 102 has moved up and down into position, and to issue the corresponding position signal when the cylinder piston 102 moves up and down into position.

[0046] The reversing valve structure 4 is connected to the first reversing trigger structure 2 and the second reversing trigger structure 3 respectively, so as to switch the cylinder chamber on the upper side of the cylinder piston 102 to intake air and the cylinder chamber on the lower side of the cylinder piston 102 to exhaust air according to the movement signal issued by the first reversing trigger structure 2, and switch the cylinder chamber on the lower side of the cylinder piston 102 to intake air and the cylinder chamber on the upper side of the cylinder piston 102 to exhaust air according to the movement signal issued by the second reversing trigger structure 3.

[0047] The hydraulic station also includes a first mounting plate 6, which is attached to the side of the first cylinder end plate 5 away from the cylinder 1. The first mounting plate 6 is provided with a reversing valve structure 4.

[0048] The first mounting plate 6 has a first mounting hole 601 at each of its four corners. The first mounting hole 601 allows screws to pass through so as to fix the first mounting plate 6 onto the first cylinder end plate 5.

[0049] Under the above conditions, the reversing valve structure 4 includes a reversing channel 401 disposed within the first mounting plate 6. The reversing channel 401 has an air inlet 402, two exhaust ports, and two working ports on its side. The two exhaust ports are a first exhaust port 403 and a second exhaust port 404, and the two working ports are a first working port 405 and a second working port 406. Exhaust mufflers are provided at both the first exhaust port 403 and the second exhaust port 404. Both ends of the reversing channel 401 are sealed, with a control port 407 on one side and a spring 408 inside the other end. The aforementioned end of the reversing channel 401 is sealed by a piston 412 and a piston cap 410 disposed on the side of the piston 412 facing away from the reversing channel 401. The aforementioned other end of the reversing channel 401 is sealed by a spring cap 411. A muffler is provided at the control port 407.

[0050] The reversing valve structure also includes a pneumatically controlled valve core 412 disposed in the reversing channel 401. After the spring 408 compresses the air intake through the control port 407, the air intake port 402 is connected to the second working port 406, and the first exhaust port 403 is connected to the first working port 405. After the spring returns to its original position, the air intake port is connected to the first working port 405, and the second exhaust port 404 is connected to the second working port 406.

[0051] Both working ports of the reversing valve structure 4 are located on the side of the first mounting plate 6 facing the cylinder 1. At this time, a first channel 1031 is provided inside the first cylinder end plate 103, with its two ends respectively located on both sides of the first cylinder end plate 103, and one end of the first channel 1031 communicating with the first working port 405. A second channel 1011 is provided inside the side wall of the cylinder body 101, with its two ends respectively located at both ends of the cylinder body 101, and one end of the second channel 1011 communicating with the other end of the first channel 1031. A third channel 1041 is provided inside the hydraulic end plate 104, with both ends of the third channel 1041 located on the side of the hydraulic end plate 104 facing the cylinder 1, and both ends of the third channel 1041 communicating with the other end of the second channel 1011 and the cylinder cavity below the cylinder piston 102. The first cylinder end plate 103 is provided with a fourth channel 1032. The two ends of the fourth channel 1032 are respectively located on both sides of the first cylinder end plate 103. The two ends of the fourth channel 1032 are respectively connected to the second working port 406 and the cylinder cavity on the upper side of the cylinder piston 102.

[0052] The first mounting plate 6 has an air intake channel 602. One end of the air intake channel 602 is connected to the air intake port 402, and the other end is located on the side of the first mounting plate 6 facing the cylinder 1. The control port 407 is located on the side of the first mounting plate 6 facing the cylinder 1. At this time, the first reversing trigger structure 2 includes a first air control chamber 201, a first air control channel 202, and a second air control channel 203 located in the first cylinder end plate 103. The first air control chamber 201 is connected to the cylinder cavity on the upper side of the cylinder piston 102. One end of the first air control channel 202 and the second air control channel 203 are both connected to the first air control chamber 201, and the other end is located on the side of the first cylinder end plate 103 away from the cylinder 1, and is connected to the other end of the air intake channel 602 and the control port 407, respectively. The first reversing trigger structure 2 also includes a first actuating shaft 204 disposed in the first pneumatic control chamber 201 and extending into the cylinder cavity above the cylinder piston 102. When the first actuating shaft 204 is actuated by the cylinder piston 102, it connects the first pneumatic control channel 202 with the second pneumatic control channel 203. When the cylinder piston 102 is not actuated, it disconnects the connection between the first pneumatic control channel 202 and the second pneumatic control channel 203.

[0053] The second reversing trigger structure 3 includes a second pneumatic control chamber 301, a third pneumatic control channel 302, and an air outlet channel 303 disposed within the hydraulic end plate 104. The second pneumatic control chamber 301 is connected to the cylinder cavity below the cylinder piston 102. One end of the third pneumatic control channel 302 is connected to the second pneumatic control chamber 301, and the other end is disposed on the side of the hydraulic end plate 104 facing the inside of the cylinder 1. One end of the air outlet channel 1043 is connected to the second pneumatic control chamber 301, and the other end is disposed on the side of the hydraulic end plate 104 facing the outside of the cylinder 1. The second reversing trigger structure 3 also includes a second actuating shaft 304 disposed within the second pneumatic control chamber 301 and extending into the cylinder cavity below the cylinder piston 102. When the second actuating shaft 304 is actuated by the cylinder piston 102, it connects the third pneumatic control channel 302 with the air outlet channel 303. When the cylinder piston 102 is not actuated, it disconnects the third pneumatic control channel 302 from the air outlet channel 303. The first cylinder end plate 103 has a fifth channel 1033, one end of which is connected to the second pneumatic control channel 203, and the other end is located on the side of the first cylinder end plate 103 facing the cylinder 1. The side wall of the cylinder body 101 has a sixth channel 1012, with both ends of the sixth channel 1012 located at both ends of the cylinder body 101, and both ends of the sixth channel 1012 connected to the other ends of the third pneumatic control channel 302 and the fifth channel 1033, respectively. The other end of the exhaust channel 303 is located on the side of the hydraulic end plate 104. The side wall of the cylinder body 101 has four fixing channels 1013 through which a screw passes to fix the first cylinder end plate 103 and the hydraulic end plate 104 to the cylinder body 101.

[0054] The hydraulic station also includes a delay valve structure 7. When the first working port 405 is inlet and the second working port 406 is not venting, the delay valve structure 7 connects the first working port 405 to the outside. When the first working port 405 is inlet and the second working port 406 is venting, the delay valve structure 7 connects the second working port 406 to the outside. When the second working port 406 is inlet and the first working port 405 is not venting, the delay valve structure 7 connects the second working port 406 to the outside. When the second working port 406 is inlet and the first working port 405 is venting, the delay valve structure 7 connects the first working port 405 to the outside.

[0055] The hydraulic station also includes a second mounting plate 8, which is fitted to the side of the first cylinder end plate 103 away from the cylinder 1, and the second mounting plate 8 is provided with a delay valve structure 7.

[0056] Under the above conditions, the delay valve structure 7 includes a delay channel 705 disposed in the second mounting plate 8. The delay channel 705 has a vent 706, a first connecting port 707 and a second connecting port 708. The vent 706 is connected to the outside, the first connecting port 707 is connected to the first working port 405, and the second connecting port 708 is connected to the second working port 406. The delay valve structure 7 also includes a delay valve core 701 disposed in the delay channel 705. When the first working port 405 is inlet and the second working port 406 is outlet, the delay valve core 701 connects the first connecting port 707 with the outlet port 706. When the first working port 405 is inlet and the second working port 406 is outlet, the delay valve core 701 connects the second connecting port 708 with the outlet port 706. When the second working port 406 is inlet and the first working port 405 is not outlet, the second connecting port 708 connects with the outlet port 706. When the second working port 406 is inlet and the first working port 405 is outlet, the first connecting port 707 connects with the outlet port 706.

[0057] The delay channel 705 has a vent 706 on its side, and both ends of the delay channel 705 are sealed. A first connecting port 707 and a second connecting port 708 are respectively provided on the side of each end. Both ends of the delay channel 705 are sealed by a delay valve cover 702. A protrusion is provided on the inner peripheral wall of the delay channel 705. An air vent 706 is provided on the protrusion. The first connecting port 707 and the second connecting port 708 are both provided on the outer sides of the protrusion. The delay valve core 701 is provided inside the protrusion and has a gap between it and the protrusion. When air enters through the first connecting port 707, the delay valve core 701 moves towards the second connecting port 708 and then stops moving. When air enters through the second connecting port 708, it moves towards the first connecting port 707 and then stops moving. The delay valve core 701 is provided with a first sealing ring 703 and a second sealing ring 704. When the delay valve core 701 stops moving towards the second connecting port 708, the first sealing ring 703 is provided inside the protrusion and seals the gap between the delay valve core 701 and the protrusion. When the delay valve core 701 stops moving towards the first connecting port 707, the second sealing ring 704 is provided outside the protrusion. When the delay valve core 701 stops moving towards the first connecting port 707, the first sealing ring 703 is provided outside the protrusion.

[0058] The first connecting port 707 and the second connecting port 708 are both located on the side of the second mounting plate 8 facing the cylinder 1. The first mounting plate 6 has a first air passage 603 and a second air passage 604. One end of the first air passage 603 and the second air passage 604 are connected to the first working port 405 and the second working port 406, respectively. The other ends are both located on the side of the first mounting plate 8 away from the cylinder 1 and are connected to the first connecting port 707 and the second connecting port 708, respectively. The vent port 803 is located on the side of the second mounting plate 8.

[0059] In the hydraulic station of this utility model, when compressed air is introduced into the air inlet 402, the pneumatic control valve core 412 is pushed to the piston 409 end by the spring 408. At this time, the second working port 406 is connected to the second exhaust port 404, and the cylinder chamber on the upper side of the cylinder piston 102 exhausts air. The first working port 405 is connected to the air inlet 402, and the cylinder chamber on the lower side of the cylinder piston 102 takes in air, pushing the cylinder piston 102 to move upward. When the cylinder piston 102 pushes the first actuating shaft 204, the air inlet 402 supplies air to the control port 407 through the air inlet channel 602, the first pneumatic control channel 202, the first pneumatic control chamber 201, and the second pneumatic control channel 203. At the same time, it is connected to the third pneumatic control channel 302 through the fifth channel 1033 and the sixth channel 1012. The air intake of the control port 407 pushes the pneumatic control valve core 412 to the limit position at the end of the spring 408 and stops. At this time, the first working port 405 and the second exhaust port 404 are connected. When the exhaust port 403 is connected, the cylinder chamber below the piston 102 exhausts gas. The second working port 406 is connected to the intake port 402, allowing air to enter the cylinder chamber above the piston 102. This pushes the piston 102 downward, and the first actuating shaft 204 returns to its spring position, closing the connection between the first pneumatic control chamber 201 and the second pneumatic control channel 203. The second pneumatic control channel 203, the fifth channel 1033, the sixth channel 1012, and the third pneumatic control channel 302 form a closed cavity to maintain pressure and ensure that the position of the pneumatic control valve core 412 remains unchanged. When the piston 102 moves downward and pushes the second actuating shaft 304, the third pneumatic control channel 302 connects to the exhaust channel 303 through the second pneumatic control chamber 301, opening the closed cavity and venting gas. The pneumatic control valve core 412 moves towards the piston 409 under the push of the spring 408. At this time, the second actuating shaft 304 returns to its spring position.

[0060] When air enters through the first working port 405, the air entering through the first connecting port 707 pushes the delay valve core 701 to the side of the second connecting port 708. The first connecting port 707 is disconnected from the vent port 706. The first working port 405 and the cylinder cavity on the lower side of the cylinder piston 102 are disconnected from the vent port 706. The second connecting port 708 is connected to the vent port 706. The second working port 406 and the cylinder cavity on the upper side of the cylinder piston 102 are connected to the vent port 706, and the cylinder is in the exhaust state. When air enters through the second working port 406, the air entering through the second connecting port 708 pushes the delay valve core 701 to the side of the first connecting port 707. The second connecting port 708 is disconnected from the vent port 706. The second working port 406 and the cylinder cavity on the upper side of the cylinder piston 102 are disconnected from the vent port 706. The first connecting port 707 is connected to the vent port 706. The first working port 405 and the cylinder cavity on the lower side of the cylinder piston 102 are connected to the vent port 706, and the cylinder is in the exhaust state.

[0061] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic hydraulic pump body, comprising a hydraulic cylinder, a hydraulic piston that is slidably sealed to the inner peripheral wall of the hydraulic cylinder and divides the hydraulic cylinder into two hydraulic chambers, a hydraulic pump head that closes one end of the hydraulic cylinder, a hydraulic end plate that closes the other end of the hydraulic cylinder, and a piston rod that passes through the hydraulic end plate and connects to the hydraulic piston, wherein the hydraulic pump head is provided with an inlet, the inlet communicating with one of the hydraulic chambers and the outside, and an inlet check valve is provided at the inlet; characterized in that, The hydraulic end plate is located at the upper end of the hydraulic cylinder. The hydraulic end plate is provided with a liquid outlet, which connects another hydraulic chamber to the outside. The lower end of the piston rod is provided with a liquid outlet check valve. The liquid outlet check valve connects the two hydraulic chambers when the piston rod moves downward and disconnects the connection when the piston rod moves upward.

2. The pneumatic hydraulic pump body as described in claim 1, characterized in that, The lower part of the hydraulic end plate has a mounting surface, which is disposed on the outer periphery of the hydraulic cylinder; The end of the liquid outlet that communicates with the outside is located above the mounting surface.

3. The pneumatic hydraulic pump body as described in claim 1, characterized in that, The inner peripheral wall of the liquid inlet is provided with a first protrusion; The liquid inlet check valve includes a first sealing head, a baffle plate, and a first spring. The first sealing head is disposed inside the liquid inlet and is in sealing contact with the first protrusion. The baffle plate covers one end of the liquid inlet near the inside of the hydraulic cylinder and has a liquid passage hole. The first spring is supported between the first sealing head and the baffle plate.

4. The pneumatic hydraulic pump body as described in claim 3, characterized in that, The number of liquid passage holes is multiple, with one liquid passage hole located on the center line of the liquid inlet, and the remaining liquid passage holes evenly arranged around the one liquid passage hole.

5. The pneumatic hydraulic pump body as described in claim 4, characterized in that, The inner peripheral wall of the inlet is provided with a liquid passage groove at one end near the inside of the hydraulic cylinder.

6. The pneumatic hydraulic pump body as described in claim 1, characterized in that, The lower end of the piston rod is provided with a cavity, and the side wall of the cavity is provided with a connecting port, which connects the cavity to the other hydraulic cavity; The liquid outlet check valve includes a second sealing head, a second spring, and a valve block. The second sealing head is disposed in the cavity, and the second spring is supported between the second sealing head and the bottom wall of the cavity. The valve block is encapsulated at the opening end of the cavity. The valve block has a through hole that connects the cavity and the hydraulic chamber. The outer peripheral surface of the through hole is in sealing contact with the second sealing head.

7. The pneumatic hydraulic pump body as described in claim 6, characterized in that, The valve block has a first mounting section and a second mounting section arranged along the center line of the through hole. The first mounting section is disposed inside the cavity, and the second mounting section is disposed outside the cavity. A second protrusion is provided on the outer peripheral wall of the second mounting section, and the second protrusion is connected to the outer peripheral surface of the opening end.

8. The pneumatic hydraulic pump body as described in claim 7, characterized in that, A first sealing ring is provided on the side of the second protrusion near the opening end, and the first sealing ring is in sealing contact with the outer peripheral surface of the opening end.

9. The pneumatic hydraulic pump body as described in claim 7, characterized in that, The second protrusion is connected to the outer peripheral surface of the opening end by a screw.

10. A hydraulic station, characterized in that, It includes the pneumatic hydraulic pump body and cylinder as described in any one of claims 1-9, wherein the piston rod of the pneumatic hydraulic pump body is connected to the cylinder piston of the cylinder.

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