Integrated manual hydraulic oil cylinder

Abstract

The utility model provides an integrated manual hydraulic oil cylinder. The integrated manual hydraulic oil cylinder comprises an oil tank, an oil cylinder and a driving module, the cylinder barrel is arranged in the oil tank, and the driving module is fixedly installed on the outer wall of the oil tank and comprises a manual pump and a reversing valve. An oil suction port of the manual pump is communicated with the oil storage cavity, and the reversing valve is used for controlling the rod cavity and the rodless cavity to be selectively communicated with the oil discharge port or the oil storage cavity. During use, the two ends of the oil cylinder are connected with the quick connectors; when the reversing valve is operated to close all oil ways, the piston rod is static; when the reversing valve is operated, the oil discharge outlet is communicated with the rodless cavity, the rod cavity is communicated with the oil tank, and the piston rod can extend out by operating the manual pump. When the reversing valve is operated, the oil discharge outlet is communicated with the rod cavity, the rodless cavity is communicated with the oil tank, and the piston rod can be retracted by operating the manual pump. According to the utility model, the manual pump, the reversing valve, the oil tank and the oil cylinder are integrated together, so that the existing hydraulic system of the excavator does not need to be modified, and the cost is saved; and the cylinder barrel is arranged in the oil tank, so that the whole device is more compact.

Description

Technical Field

[0001] This utility model relates to the field of excavator parts technology, specifically to an integrated manual hydraulic cylinder. Background Technology

[0002] Excavator quick-connect couplings, also known as quick-change couplings or fast connectors, are devices that allow for the rapid installation and switching of various configuration parts on an excavator. By using quick-connect couplings, operators can quickly change excavator working devices such as buckets, rippers, breakers, and hydraulic shears, significantly expanding the excavator's usability and improving work efficiency.

[0003] Excavator quick connectors generally come in two drive structures: mechanical and hydraulic. Mechanical quick connectors are driven by a rotating mechanical screw. Because excavator components are subjected to high-intensity reciprocating motion for extended periods, this can easily lead to screw deformation, loosening, and thread damage. Furthermore, the harsh operating environment of excavator components often results in threads being contaminated with mud and sand, making disassembly and installation not only time-consuming and labor-intensive but also physically demanding.

[0004] Hydraulic quick-connect couplings primarily rely on the action of hydraulic devices to drive the connectors. Hydraulic devices offer high power, stability, and ease of operation, requiring only the control of a pipeline solenoid switch. However, current hydraulic quick-connect couplings necessitate modifications to the excavator's hydraulic system during installation, including the addition of metal hydraulic hoses, flexible hydraulic hoses, spare valves, and solenoid control valves. This results in numerous hydraulic components, a complex structure, and higher costs. Furthermore, the complexity of the hydraulic system makes it prone to leaks, leading to higher maintenance costs.

[0005] Therefore, there is a need for a quick connector drive device that requires no modification to the excavator's existing hydraulic system, and is simple in structure and reliable in operation. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problems of screw deformation, loosening and thread damage caused by the high working intensity and harsh working environment of the excavator's working parts in the existing mechanical drive structure for quick connectors, while the hydraulic drive structure requires modification of the excavator's hydraulic system, resulting in complex structure and high cost. Therefore, this utility model provides a quick connector drive device that does not require modification of the excavator's existing hydraulic system and has a simple structure and reliable operation.

[0007] Therefore, this utility model provides an integrated manual hydraulic cylinder, comprising:

[0008] tank;

[0009] A hydraulic cylinder includes a cylinder barrel, a piston slidably connected to the inner wall of the cylinder barrel, and a piston rod fixedly connected to the piston at one end; the cylinder barrel is disposed inside the oil tank, and both ends protrude from both ends of the oil tank respectively; the outer wall of the cylinder barrel and the inner wall of the oil tank enclose an oil storage cavity for holding hydraulic oil; the other end of the piston rod protrudes from one end of the cylinder barrel.

[0010] The drive module, fixedly installed on the outer wall of the oil tank, includes a manual pump and a reversing valve; the oil inlet of the manual pump is connected to the oil storage chamber, and the reversing valve is connected to the oil outlet of the manual pump, the oil storage chamber, the rod chamber and the rodless chamber of the oil cylinder respectively, for controlling the rod chamber and the rodless chamber to selectively connect to the oil outlet or the oil storage chamber.

[0011] Furthermore, the reversing valve is a manual three-position four-way reversing valve. The oil inlet of the manual three-position four-way reversing valve is connected to the oil outlet of the manual pump, the oil return port of the manual three-position four-way reversing valve is connected to the oil storage chamber, the first working port of the manual three-position four-way reversing valve is connected to the rod chamber, and the second working port of the manual three-position four-way reversing valve is connected to the rodless chamber.

[0012] Furthermore, the manual pump and the reversing valve are arranged side by side, with the oil inlet of the reversing valve located on the side facing the manual pump and opposite to the oil outlet of the manual pump, and connected through an oil inlet pipeline.

[0013] Furthermore, the first working port is located on the side of the manual three-position four-way directional valve facing the rod chamber, and the first working port is connected to the rod chamber through a first working pipeline.

[0014] Furthermore, the second working port is located on the side of the manual three-position four-way directional valve facing the rodless chamber, and the second working port is connected to the rodless chamber through a second working pipeline.

[0015] Furthermore, the return port of the manual three-position four-way directional valve is connected to the oil storage chamber through a return oil pipeline;

[0016] Preferably, the oil suction port of the manual pump is connected to the oil storage chamber through an oil suction pipe.

[0017] Furthermore, a mounting surface is formed on the outer side wall of the oil tank surrounding the cylinder circumference, the mounting surface being used to mount the manual pump and the reversing valve.

[0018] Furthermore, an arc-shaped surface is formed on the outer side wall of the oil tank surrounding the cylinder, and the two ends of the arc-shaped surface in the circumferential direction surrounding the cylinder are respectively connected to the mounting plane.

[0019] Furthermore, the two ends of the oil tank are welded to the cylinder.

[0020] Furthermore, a connector is provided at the other end of the piston rod and the other end of the cylinder, the connector being used to connect a quick connector.

[0021] The technical solution provided by this utility model has the following advantages:

[0022] This utility model discloses an integrated manual hydraulic cylinder, comprising an oil tank, a cylinder, and a drive module. The cylinder includes a cylinder barrel, a piston slidably connected to the inner wall of the cylinder barrel, and a piston rod fixedly connected to the piston at one end. The cylinder barrel is located inside the oil tank, with both ends extending out from both ends of the oil tank. The outer wall of the cylinder barrel and the inner wall of the oil tank enclose an oil storage chamber for holding hydraulic oil. The other end of the piston rod extends out from one end of the cylinder barrel. The drive module is fixedly installed on the outer wall of the oil tank and includes a manual pump and a reversing valve. The suction port of the manual pump is connected to the oil tank, and the reversing valve is connected to the discharge port of the manual pump, the oil tank, the rod chamber, and the rodless chamber of the cylinder, respectively, for controlling the rod chamber and the rodless chamber to selectively connect to the discharge port or the oil tank.

[0023] In use, the two ends of the hydraulic cylinder are connected to the quick connector. Initially, the directional valve closes all oil circuits, and the piston rod is stationary. When the piston rod needs to extend, the directional valve is operated to connect the manual pump's drain port to the rodless chamber of the hydraulic cylinder, and the rod chamber to the oil tank. Then, the manual pump draws hydraulic oil from the oil tank's reservoir, pressurizes it, discharges it from the drain port, and enters the rodless chamber of the hydraulic cylinder via the directional valve, pushing the piston to move and extending the piston rod, thereby driving the connected quick connector (e.g., for connection to a bucket or other working device). When… When the piston rod needs to retract, operate the directional valve to connect the manual pump's drain port to the rod chamber of the cylinder and the rodless chamber to the oil tank. Then, operate the manual pump to draw hydraulic oil from the oil tank's reservoir, pressurize it, discharge it from the drain port, and allow it to enter the rod chamber of the cylinder via the directional valve. This pushes the piston to move, causing the piston rod to retract, which in turn drives the connected quick connector to actuate (e.g., disconnecting from the excavator bucket or other working device). After the piston rod drives the quick connector to complete the relevant action, operate the directional valve to close all oil circuits, stopping the piston rod from moving and maintaining the current state.

[0024] This utility model discloses an integrated manual hydraulic cylinder that integrates a manual pump, a reversing valve, an oil tank, and a cylinder into one unit. It allows for direct manual drive of the quick-connect coupling, eliminating the need to modify the excavator's existing hydraulic system. Furthermore, it can operate stably even without power supply, making it suitable for field operations of construction machinery. By placing the cylinder barrel inside the oil tank, space is saved, resulting in a more compact overall structure. The cylinder barrel's location within the oil tank allows for cooling using the hydraulic oil, extending its service life. The combination of the manual pump and the reversing valve enables precise control of the piston rod's direction and speed, meeting the needs of various working conditions. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0026] Figure 1 This is a sectional view of the main view of the integrated manual hydraulic cylinder of this utility model.

[0027] Figure 2 This is a left view of the integrated manual hydraulic cylinder of this utility model.

[0028] Figure 3 This is a top view of the integrated manual hydraulic cylinder of this utility model.

[0029] Reference numerals: 1. Oil tank; 100. Oil storage chamber; 101. Mounting plane; 102. Arc-shaped surface; 2. Oil cylinder; 21. Cylinder barrel; 22. Piston; 23. Piston rod; 24. Connecting part; 201. Rod chamber; 202. Rodless chamber; 3. Manual pump; 300. Pump handle; 31. Oil suction port; 32. Oil discharge port; 4. Reversing valve; 400. Valve handle; 41. First working oil port; 42. Second working oil port; 43. Oil inlet; 44. Oil return port; 5. Oil inlet pipeline; 6. First working pipeline; 7. Second working pipeline; 8. Oil return pipeline; 9. Oil suction pipeline. Detailed Implementation

[0030] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0031] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0032] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] This embodiment provides an integrated manual hydraulic cylinder, such as Figure 1-3 As shown, the system includes an oil tank 1, an oil cylinder 2, and a drive module. The oil cylinder 2 includes a cylinder barrel 21, a piston 22 slidably connected to the inner wall of the cylinder barrel 21, and a piston rod 23 fixedly connected to the piston 22 at one end. The cylinder barrel 21 is located inside the oil tank 1, with both ends extending out from both ends of the oil tank 1. The outer wall of the cylinder barrel 21 and the inner wall of the oil tank 1 enclose an oil storage cavity 100 for holding hydraulic oil. The other end of the piston rod 23 extends from one end of the cylinder barrel 21. The drive module is fixedly installed on the outer wall of the oil tank 1, and includes a manual pump 3 and a reversing valve 4. The oil suction port 31 of the manual pump 3 is connected to the oil storage chamber 100, and the reversing valve 4 is connected to the oil discharge port 32 of the manual pump, the oil storage chamber 100, the rod chamber 201 and the rodless chamber 202 of the oil cylinder 2, respectively, for controlling the rod chamber 201 and the rodless chamber 202 to selectively connect to the oil discharge port 32 or the oil storage chamber 100.

[0035] In this embodiment, the hydraulic cylinder 2, manual pump 3, and reversing valve 4 can be selected from mature products in the prior art. During use, both ends of the hydraulic cylinder are connected to the quick connector. Initially, the reversing valve 4 closes all oil circuits, and the piston rod 23 is stationary. When the piston rod 23 needs to extend, the reversing valve 4 is operated to connect the oil outlet 32 ​​of the manual pump 3 to the rodless chamber 202 of the hydraulic cylinder 2, and to connect the rod chamber 201 to the oil reservoir 100. Then, the pump handle 300 of the manual pump 3 is operated to draw hydraulic oil from the oil reservoir 100 of the oil tank 1, pressurize it, and discharge it from the oil outlet 32. The oil then enters the rodless chamber 202 of the hydraulic cylinder 2 through the reversing valve 4, pushing the piston 22 to move and causing the piston rod 23 to extend. Simultaneously, the hydraulic oil j in the rod chamber 201 flows back to the oil reservoir 100 through the reversing valve 4, thereby driving the connected quick connector to operate (e.g., connecting to a working device such as a bucket). When the piston rod 23 needs to extend, the reversing valve 4 is operated to connect the hydraulic cylinder 2 to the quick connector. When piston rod 23 retracts, operate directional valve 4 to connect the oil outlet 32 ​​of manual pump 3 with the rod chamber 201 of cylinder 2, and connect the rodless chamber 202 with the oil storage chamber 100. Then operate pump handle 300 of manual pump 3 to draw hydraulic oil from oil storage chamber 100 of oil tank 1, pressurize it and discharge it from oil outlet 32, and enter the rod chamber 201 of cylinder 2 through directional valve 4, pushing piston 22 to move and driving piston rod 23 to retract. At the same time, the hydraulic oil in rodless chamber 202 flows back to oil storage chamber 100 through directional valve 4, thereby driving the quick connector connected to it to move (e.g., disconnecting from working devices such as buckets). After piston rod 23 drives quick connector to complete the relevant action, operate directional valve 4 to close all oil circuits, stop piston rod 23 from moving and maintain the current state.

[0036] The integrated manual hydraulic cylinder of this embodiment integrates the manual pump 3, the reversing valve 4, the oil tank 1, and the cylinder 2 together. It can directly drive the quick connector manually without modifying the excavator's existing hydraulic system. It can also operate stably in environments without power supply, making it suitable for field operations of construction machinery. By placing the cylinder barrel 21 of the cylinder 2 inside the oil tank 1, space is saved, making the overall structure of this embodiment more compact. The cylinder barrel 21, located inside the oil tank 1, can be cooled by the hydraulic oil in the oil storage chamber 100, which helps to extend the service life of the cylinder 2. Through the cooperation of the manual pump 3 and the reversing valve 4, precise control of the movement direction and speed of the piston rod 23 can be achieved to meet the needs of different working conditions.

[0037] The integrated manual hydraulic cylinder of this embodiment, further, such as Figure 2 , Figure 3As shown, the reversing valve 4 is a manual three-position four-way reversing valve. The oil inlet 43 of the manual three-position four-way reversing valve is connected to the oil outlet 32 ​​of the manual pump 3. The oil return port 44 of the manual three-position four-way reversing valve is connected to the oil storage chamber 100. The first working oil port 41 of the manual three-position four-way reversing valve is connected to the rod chamber 201. The second working oil port 42 of the manual three-position four-way reversing valve is connected to the rodless chamber 202.

[0038] In this embodiment, the manual three-position four-way directional valve can be selected from existing mature products. The manual three-position four-way directional valve has three positions (neutral, left, and right) and four ports (inlet 43, return 44, first working port 41, and second working port 42). Initially, the manual three-position four-way directional valve is in the neutral position (e.g.,...). Figure 3 As shown), at this time all oil ports are closed, and there is no connection between the oil inlet 43, the oil return port 44, the first working oil port 41, and the second working oil port 42. The rod chamber 201 and the rodless chamber 202 of the cylinder 2 are both in a closed state. Therefore, the piston rod 23 remains stationary, and the quick connector maintains its current connection state. Operate the manual three-position four-way directional valve 4 to the left position (move the valve handle 400 to the right). The inlet port 43 connects to the second working port 42, and the first working port 41 connects to the return port 44. The pressurized oil discharged from the manual pump 3 enters the directional valve 4 through the inlet port 43, flows out from the second working port 42, and enters the rodless chamber 202 of the cylinder 2. The hydraulic oil in the rod chamber 201 of the cylinder 2 enters the first working port 41 of the directional valve 4, then flows out from the return port 44, and finally returns to the reservoir 100, thereby driving the piston rod 23 to extend outward, which in turn actuates the quick-connect coupling connected to it. Continue operating the manual pump 3 and the directional valve 4 until the piston rod 23 extends to the predetermined position, completing the connection of the quick-connect coupling (e.g., connecting to a working device such as a bucket). Move the directional valve 4 back to the neutral position to close all ports, fixing the piston rod 23 in the current position and maintaining the connection. Operate the manual three-position four-way directional valve 4 to the right position (turn the valve handle 400 to the left), connecting the inlet port 43 to the first working port 41 and the second working port 42 to the return port 44. The pressurized oil discharged from the manual pump 3 enters the directional valve 4 through the inlet port 43, then flows out from the first working port 41 and into the rod chamber 201 of the cylinder 2. The hydraulic oil in the rodless chamber 202 of the cylinder 2 enters the second working port 42 of the directional valve 4, then flows out from the return port 44, and finally flows back into the reservoir 100, thereby retracting the piston rod 23 and actuating the quick-connect coupling. Continue operating the manual pump 3 and the directional valve 4 until the piston rod 23 retracts to the predetermined position, and the quick-connect coupling is disconnected (e.g., disconnected from the working device such as the bucket). Turning the directional valve 4 back to the neutral position closes all ports, fixing the piston rod 23 in its current position and keeping it disconnected.

[0039] The integrated manual hydraulic cylinder and manual three-position four-way directional valve in this embodiment are simple, intuitive and easy to master, reducing the difficulty of operation. At the same time, the manual three-position four-way directional valve can control the forward, backward and stop states of the cylinder piston rod, meeting the basic operational requirements of the quick connector.

[0040] The integrated manual hydraulic cylinder of this embodiment, further, such as Figure 2 , Figure 3 As shown, the manual pump 3 and the reversing valve 4 are arranged side by side. The oil inlet 43 of the reversing valve 4 is located on the side facing the manual pump 3 and is opposite to the oil outlet 32 ​​of the manual pump 3, and is connected through the oil inlet pipe 5.

[0041] In this embodiment, the manual pump 3 and the reversing valve 4 are arranged side by side, which can further reduce the size of the drive module and make the whole device more compact; the oil inlet 43 of the reversing valve 4 is opposite to the oil outlet 32 ​​of the manual pump 3, which reduces the length of the oil inlet pipeline 5, reduces pressure loss, and improves transmission efficiency.

[0042] The integrated manual hydraulic cylinder of this embodiment, further, such as Figure 3 As shown, the first working port 41 is located on the side of the manual three-position four-way directional valve facing the rod chamber 201, and the first working port 41 is connected to the rod chamber 201 through the first working pipeline 6.

[0043] In this embodiment, the first working oil port 41 faces the rod chamber 201, which makes the arrangement of the first working pipeline 6 more reasonable, avoids pipeline bending and interference, and at the same time shortens the length of the first working pipeline 6, reduces pressure loss, and improves transmission efficiency.

[0044] In this embodiment of the integrated manual hydraulic cylinder, the second working port 42 is located on the side of the manual three-position four-way directional valve facing the rodless chamber 202, and the second working port 42 is connected to the rodless chamber 202 through the second working pipeline 7.

[0045] In this embodiment, the second working oil port 42 faces the rodless cavity 202, which makes the arrangement of the second working pipeline 7 more reasonable, avoids interference between pipelines, and at the same time shortens the length of the second working pipeline, reduces pressure loss, and improves transmission efficiency.

[0046] In this embodiment of the integrated manual hydraulic cylinder, the oil return port 44 of the manual three-position four-way directional valve is connected to the oil storage chamber 100 through the oil return pipeline 8.

[0047] Preferably, the oil suction port 31 of the manual pump is connected to the oil storage chamber 100 through the oil suction pipe 9.

[0048] The integrated manual hydraulic cylinder of this embodiment, further, such as Figure 2 As shown, an mounting surface 101 is formed on the outer side wall of the oil tank 1 surrounding the cylinder 21, and the mounting surface 101 is used to mount the manual pump 3 and the reversing valve 4.

[0049] In this embodiment, an installation plane 101 is formed on the outer wall of the oil tank 1, which facilitates the installation of the manual pump 3 and the reversing valve 4 and improves the installation efficiency; at the same time, the installation plane 101 can accurately position the manual pump 3 and the reversing valve 4, ensuring the structural stability of the entire drive module.

[0050] In this embodiment of the integrated manual hydraulic cylinder, the outer wall of the oil tank 1 surrounding the cylinder 21 is further formed with an arc-shaped surface 102, and the two ends of the arc-shaped surface 102 surrounding the cylinder 21 are respectively connected to the mounting plane 101.

[0051] In this embodiment, the arc-shaped surface 102 can improve the structural strength of the outer wall of the oil tank 1 and enhance the pressure resistance of the oil tank 1; at the same time, the arc-shaped surface can achieve a smooth transition between the mounting plane 101 and other parts, avoid stress concentration, and improve the overall reliability of the oil tank 1.

[0052] In this embodiment of the integrated manual hydraulic cylinder, the two ends of the oil tank 1 are welded to the cylinder barrel 21.

[0053] The integrated manual hydraulic cylinder of this embodiment, further, such as Figure 1 , Figure 3 As shown, the other end of the piston rod 23 and the other end of the cylinder 21 are respectively provided with a connector 24, which is used to connect a quick connector.

[0054] In this embodiment, the connector 24 can be a cylindrical structure, which facilitates connection with different types of quick connectors and improves the versatility of the device. The connector 24 allows for easy connection of the piston rod 23 and cylinder 21 to the quick connector, improving connection efficiency.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. An integrated manual hydraulic cylinder, characterized by, Comprise: Oil tank (1); Oil cylinder (2), comprising cylinder (21), piston (22) and piston rod (23) fixedly connected with one end of the piston (22); the cylinder (21) is arranged in the oil tank (1), and both ends are respectively from the both ends of the oil tank (1) to wear out, the outer wall of the cylinder (21) and the inner wall of the oil tank (1) are surrounded to form the oil storage cavity (100) for containing hydraulic oil; the other end of the piston rod (23) is from one end of the cylinder (21) to wear out; Drive module, fixedly installed on the outer wall of the oil tank (1), comprising a hand pump (3) and a reversing valve (4); the oil suction port (31) of the hand pump (3) is communicated with the oil storage cavity (100), the reversing valve (4) is respectively communicated with the oil discharge port (32) of the hand pump, the oil storage cavity (100), the rod cavity (201) and the rodless cavity (202) of the oil cylinder (2), for controlling the rod cavity (201) and the rodless cavity (202) can be selectively communicated with the oil discharge port (32) or the oil storage cavity (100).

2. The integrated manual hydraulic cylinder according to claim 1, wherein, The reversing valve (4) is a manual three-position four-way reversing valve, the oil inlet (43) of the manual three-position four-way reversing valve is communicated with the oil discharge port (32) of the hand pump, the oil return port (44) of the manual three-position four-way reversing valve is communicated with the oil storage cavity (100), the first working oil port (41) of the manual three-position four-way reversing valve is communicated with the rod cavity (201), and the second working oil port (42) of the manual three-position four-way reversing valve is communicated with the rodless cavity (202).

3. The integrated manual hydraulic cylinder according to claim 2, wherein, The hand pump (3) and the reversing valve (4) are arranged side by side, the oil inlet (43) of the reversing valve (4) is arranged on the side facing the hand pump (3), and is opposite to the oil discharge port (32) of the hand pump (3), and is communicated through the oil inlet pipeline (5).

4. The integrated manual hydraulic cylinder according to claim 3, wherein, The first working oil port (41) is arranged on the side of the manual three-position four-way reversing valve facing the rod cavity (201), and the first working oil port (41) is communicated with the rod cavity (201) through the first working pipeline (6).

5. The integrated manual hydraulic ram as claimed in claim 4, wherein, The second working oil port (42) is arranged on the side of the manual three-position four-way reversing valve facing the rodless cavity (202), and the second working oil port (42) is communicated with the rodless cavity (202) through the second working pipeline (7).

6. The integrated manual hydraulic ram as claimed in claim 5, wherein, The oil return port (44) of the manual three-position four-way reversing valve is communicated with the oil storage cavity (100) through the oil return pipeline (8); The oil suction port (31) of the hand pump is communicated with the oil storage cavity (100) through the oil suction pipeline (9).

7. The integrated manual hydraulic cylinder of claim 1, wherein, The outer wall of the oil tank (1) around the cylinder (21) is profiled with a mounting plane (101), and the mounting plane (101) is used for mounting the hand pump (3) and the reversing valve (4).

8. The integrated manual hydraulic ram as claimed in claim 7, wherein, The oil tank (1) further comprises an arc surface (102) formed on the outer side wall of the oil tank (1) and surrounding the cylinder barrel (21) in the circumferential direction, and two ends of the arc surface (102) in the circumferential direction of the cylinder barrel (21) are respectively connected with the mounting plane (101).

9. The integrated manual hydraulic cylinder of claim 1, wherein, The oil tank (1) is welded to the cylinder barrel (21) at two ends.

10. The integrated manual hydraulic cylinder of claim 1, wherein, The other end of the piston rod (23) and the other end of the cylinder barrel (21) are respectively provided with a connecting piece (24), and the connecting piece (24) is used for connecting a quick connector.

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