An electro-hydraulic push rod pump valve integrated assembly

Abstract

An integrated electro-hydraulic push rod pump and valve assembly. This assembly involves improvements to the structure of a hydraulic integrated lock. It includes a valve body, a relief valve seat, a gear pump assembly, and a pump housing. Balancing valve holes A / B are symmetrically positioned above the main orifice of the valve body, each of which has a return oil passage A / B. Throttling oil passages A / B, communicating with the main orifice, and balancing oil passages A / B, communicating with the balancing valve holes A / B, are laterally positioned within the throttle valve holes A / B. Working oil passages A / B are also positioned on the walls of the main valve core on either side. This invention overcomes the technical difficulties of achieving high integration within a limited volume. A pair of balancing valve holes and a throttling valve hole are designed on the valve block. These holes are connected to the main orifice, a pair of oil inlets, a working oil port, and other components, along with bypass passages and related valve components, to connect the oil source to the actuator. This ensures efficient, high-precision, and high-reliability operation of the electro-hydraulic push rod while achieving high integration of the hydraulic system. This invention integrates the regulation functions of overflow, throttling, and balancing, ensuring stable pressure and sensitive speed and throttling during system operation.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic technology, and in particular relates to an improvement of a hydraulic integrated lock structure for an electro-hydraulic push rod. Background Art

[0002] To improve the structure of the hydraulic integrated lock for an electro-hydraulic push rod, the structure is designed to achieve stable self-locking performance, sensitive response, low operating noise, and effective prevention of internal leakage during operation, thereby increasing the service life of the hydraulic components and the operating accuracy of the electro-hydraulic push rod. A prior art patent application titled "External Circulation Hydraulic Integrated Lock for Electro-hydraulic Push Rod" and application / patent number "201320016060.3" discloses a technical solution that utilizes an external circulation method for pressure oil return in hydraulic oil circuit control, with one-way valves disposed on both sides of the main valve core in the main hole, achieving good technical results.

[0003] Over the past decade, as industry users have continuously increased their requirements for hydraulic control devices for electro-hydraulic push rods, concerns have been raised, such as: the low level of integration of the hydraulic assembly, resulting in a bulky and high-cost hydraulic assembly. Furthermore, if a gear pump is required on the basis of the aforementioned patented technology to achieve oil supply, and a throttling reversing valve assembly is required to control the flow rate of the system, and thus control the working speed of the electro-hydraulic push rod, these issues will arise. In other words, the existing technology requires an independent gear pump to be superimposed on other similar combination valves to achieve the supply of a pressure oil source. The structure is complex, the cost is high, the system is complicated, and the volume is large. During use, the user needs to assemble and debug, which can easily cause unstable system pressure and a high failure rate.

[0004] Therefore, designing a compact, compact hydraulic assembly that can deliver oil supply, oil pressure control, and flow rate control while maintaining the original two-way interlocking function has become a pressing technical challenge in this field. However, designing the internal space structure within the limited valve block to achieve these technical tasks has long been a technical barrier in this field. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides a bidirectional interlocking electro-hydraulic push rod hydraulic assembly with a sophisticated structure, low cost, easy operation, and the ability to meet the requirements of multiple oil supply parameter adjustment.

[0006] The technical solution of the present invention is as follows: comprising a valve body, a main hole is formed in the valve body, a main valve core is arranged in the main hole, a one-way valve assembly is respectively arranged at both ends of the main hole, and further comprising a pump seat, a gear pump assembly and a pump casing;

[0007] The pump housing is arranged at the front end of the valve body, and the pump housing is in a sheet shape. A pump cavity is opened in the middle of the pump housing, and a gear pump oil port A and a gear pump oil port B are opened on both sides of the middle of the pump cavity respectively;

[0008] The gear pump assembly includes a main shaft, a driving gear, a driven gear and a driven shaft; the driving gear and the driven gear are meshed with each other and accommodated in a pump cavity of a pump housing;

[0009] The pump seat is arranged at the front end of the pump housing, and is provided with a main shaft hole 1 and a driven shaft hole 1 in the direction of the pump housing. A relief valve connecting hole A and a relief valve connecting hole B are provided at positions corresponding to the gear pump oil port A and the gear pump oil port B on the pump housing; a pair of upright relief valve holes A and relief valve holes B are also provided on the pump seat, the relief valve hole A is connected to the relief valve connecting hole A, and the relief valve hole B is connected to the relief valve connecting hole B, and relief holes A and relief holes B are respectively provided beside the middle and lower parts of the relief valve holes A and the relief valve holes B; a relief valve A is installed in the relief valve hole A, and a relief valve B is installed in the relief valve hole B;

[0010] The valve body is also provided with the following structure:

[0011] A second main shaft hole and a second driven shaft hole are provided on the end surface of the valve body facing the pump housing, and an oil supply passage A and an oil supply passage B are provided at positions corresponding to the gear pump oil port A and the gear pump oil port B on the pump housing; a pair of horizontal oil inlet A and oil inlet B are also provided on the valve body, and a pair of throttling reversing valve holes A and throttling reversing valve holes B are provided on the top surface of the valve body, the throttling reversing valve hole A communicating with the oil inlet A and the oil supply passage A, and the throttling reversing valve hole B communicating with the oil inlet B and the oil supply passage B; a throttling reversing valve A and a throttling reversing valve B are provided in the throttling reversing valve hole A and the throttling reversing valve hole B, respectively;

[0012] A balancing valve hole A and a balancing valve hole B are symmetrically opened above the main hole of the valve body, and the balancing valve hole A and the balancing valve hole B are respectively opened with an oil return channel A and an oil return channel B leading to the outside;

[0013] A throttling oil passage A communicating with the main hole and a balancing oil passage A communicating with the balancing valve hole A are transversely opened in the throttling reversing valve hole A;

[0014] A throttling oil passage B communicating with the main hole and a balancing oil passage B communicating with the balancing valve hole B are transversely opened in the throttling reversing valve hole B;

[0015] A working oil passage A and a working oil passage B are respectively opened on the main hole walls on both sides of the main valve core.

[0016] Furthermore, the throttle reversing valve includes an adjusting screw, a throttle reversing valve spring and a throttle reversing valve core. The throttle reversing valve core includes a main body that slides with the throttle reversing valve hole and a positioning rod at the bottom end of the main body. Under the action of oil pressure, the throttle reversing valve core performs a lifting movement in the throttle reversing valve hole to achieve shielding of the balancing oil channel and / or the throttle oil channel.

[0017] Furthermore, the throttle reversing valve core adjusts the opening and closing amount of the throttle oil channel A or B under the action of the adjusting screw and the throttle reversing valve spring.

[0018] Furthermore, in the gear pump assembly, the main shaft is movably connected between the second main shaft hole and the first main shaft hole, and the driven shaft is movably connected between the second driven shaft hole and the first driven shaft hole.

[0019] Furthermore, the valve body, pump housing and pump seat are respectively provided with a matching connection hole 1 and connection hole 2, and positioning pins are respectively provided between the valve body and the pump housing, and between the pump housing and the pump seat.

[0020] Furthermore, the oil inlet A and the oil inlet B are respectively provided with a one-way valve.

[0021] Furthermore, a pressure measuring port is provided on the top surface of the valve body, and the pressure measuring port is connected to the main hole through a pressure measuring oil channel.

[0022] Furthermore, the balancing valve hole A, balancing valve hole B, throttling reversing valve hole A, throttling reversing valve hole B, overflow valve hole A and overflow valve hole B are all located on the top surface of the valve body and the pump seat.

[0023] The present invention's integrated electro-hydraulic pushrod pump-valve assembly represents a significant innovation, significantly improving upon existing hydraulic integrated locks. While ensuring bidirectional operation of the electro-hydraulic pushrod, it overcomes the technical challenge of integrating multiple functions within a limited valve block. By designing a pair of balancing valve holes and a pair of throttling / reversing valve holes within a limited valve block, these holes are integrated with the main holes, a pair of oil inlets, a pair of working oil ports, and bypass channels and associated valve components to connect the oil source (pump) with the actuator (electro-hydraulic pushrod). This ensures efficient, precise, and reliable operation of the pushrod while achieving a highly integrated hydraulic system, integrating the gear pump, speed control valve (throttling / reversing valve), and hydraulic valve block assembly. The present invention boasts a compact overall structure, high cost-effectiveness, stable performance, and easy installation. In operation, the integrated overflow, throttling, and balancing functions ensure stable pressure and sensitive speed and throttling during system operation. The present invention has a wide range of applications and can also be used in other hydraulic applications, such as split hydraulic power sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is the external structure diagram of the present invention,

[0025] Figure 2 It is a structural schematic diagram of the present invention.

[0026] Figure 3 It is a structural diagram of the pump seat in the present invention,

[0027] Figure 4 yes Figure 3 A top view of

[0028] Figure 5 yes Figure 3 Right view,

[0029] Figure 6 yes Figure 5 Middle AA section view.

[0030] Figure 7 It is a structural diagram of the pump casing in the present invention,

[0031] Figure 8 yes Figure 7 Left view of .

[0032] Figure 9 It is a structural diagram of the valve block in the present invention.

[0033] Figure 10 yes Figure 9 A top view of

[0034] Figure 11 yes Figure 9 Left view of

[0035] Figure 12 yes Figure 9 Right view,

[0036] Figure 13 yes Figure 9 Middle BB cross-section view,

[0037] Figure 14 yes Figure 13 EE cross-sectional view,

[0038] Figure 15 yes Figure 9 Middle CC section view,

[0039] Figure 16 yes Figure 9 Middle DD cross-sectional view.

[0040] Figure 17 The working principle of the present invention Figure 1 ,

[0041] Figure 18 The working principle of the present invention Figure 2 ,

[0042] Figure 19 The working principle of the present invention Figure 3 ,

[0043] Figure 20 yes Figure 17 FF cross-sectional view,

[0044] Figure 21 yes Figure 17 Middle GG cross-sectional view.

[0045] In the figure, 1 is the valve body, 1001 is the connection hole 1, 1002 is the connection hole 2, 1003 is the positioning pin hole, and 1010 is the main hole.

[0046] 101A is the one-way valve assembly A, 1011 is the main valve core, 1012 is the one-way valve core, 1013 is the steel ball,

[0047] 102A is the hydraulic oil inlet and outlet A,

[0048] 103A is the balancing valve A,

[0049] 104A is the throttle reversing valve A, 1041 is the throttle reversing valve core,

[0050] 105A is the working oil port A,

[0051] 106 is the pressure measuring port, 1061 is the pressure measuring oil channel,

[0052] 301A is relief valve A, 301B is relief valve B;

[0053] 11A is the main hole A end, 11B is the main hole B end, 12A is the oil inlet A, 12B is the oil inlet B, 13A is the balance valve hole A, 13B is the balance valve hole B, 14A is the throttle reversing valve hole A, 14B is the throttle reversing valve hole B, 15A is the working oil interface A, 15B is the working oil interface B, 16 is the main shaft hole 2, 17 is the driven shaft hole 2, 18A is the oil supply channel A, 18B is the oil supply channel B;

[0054] IA is the balance oil passage A, IB is the balance oil passage B, IIA is the throttle oil passage A, IIB is the throttle oil passage B, IIIA is the return oil passage A, IIIB is the return oil passage B, IVA is the working oil passage A, IVB is the working oil passage B,

[0055] 2 is the pump housing, 21 is the pump chamber, 22A is the gear pump oil port A, and 22B is the gear pump oil port B;

[0056] 3 is the pump seat, 31A is the relief valve hole A, 310A is the relief valve connecting hole A, 31B is the relief valve hole B, 310B is the relief valve connecting hole B, 32A is the relief hole A, 32B is the relief hole B, 33 is the main shaft hole 1, 34 is the driven shaft hole 1;

[0057] 4 is the main shaft, 41 is the driving gear, 42 is the driven gear, and 43 is the driven shaft. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-21 To further illustrate the present invention, it should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "inner", "outer", "front", "back" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0059] The electro-hydraulic push rod pump valve integrated assembly of the present invention has a centrally symmetrical structure as a whole, with two sides bounded by a horizontal axis, namely side A and side B.

[0060] Specifically, the present invention includes a valve body 1, a horizontal main hole 1010 is opened in the valve body 1, a main valve core 1011 is provided in the main hole 1010, and a one-way valve assembly (i.e., a one-way valve assembly A101A and a one-way valve assembly B101B in the figure) is provided at both ends of the main hole 1010, and also includes a pump seat 3, a gear pump assembly and a pump housing 2; Figure 1-2 .

[0061] The pump housing 2 is located at the front end of the valve body 1. It is sheet-shaped and has a pump chamber 21 defined in its center. This chamber accommodates a pair of meshing gears from the gear pump. The pump chamber 2 is shaped like an "8," formed by the intersection of two superior arcs. Gear pump oil ports A22A and B22B are located on either side of the center of the pump chamber 2.

[0062] The gear pump assembly includes a main shaft 4, a driving gear 41, a driven gear 42 and a driven shaft 43; the driving gear 41 and the driven gear 42 are meshed with each other and accommodated in the pump cavity 21 of the pump housing 2; Figure 7-8 .

[0063] The pump base 3 is arranged at the front end of the pump housing 2. A main shaft hole 33 and a driven shaft hole 34 are opened on the pump base 3 toward the pump housing 2. A relief valve connecting hole A310A and a relief valve connecting hole B310B are opened at the positions corresponding to the gear pump oil port A22A and the gear pump oil port B22B on the pump housing; a pair of upright relief valve holes A31A and relief valve holes B31B are also opened on the pump base 3. The relief valve hole A31A is connected to the relief valve connecting hole A310A, and the relief valve hole B31B is connected to the relief valve connecting hole B310B. An relief hole A32A and an relief hole B32B are opened beside the middle and lower parts of the relief valve hole A31A and the relief valve hole B respectively; a relief valve A301A is installed in the relief valve hole A31A, and a relief valve B301B is installed in the relief valve hole B31B; Figure 3-6 In this way, the oil supply pressure can be adjusted according to the design requirements when the gear pump assembly supplies oil to the device. In view of the fact that the overflow valve belongs to conventional technology in this field, the specific structure of the overflow valve will not be described in detail in this case.

[0064] The valve body 1 of the present invention is also provided with the following structure: Figure 9-16 ,

[0065] A second main shaft hole 16 and a second driven shaft hole 17 are provided on the end surface of the valve body 1 facing the pump housing 2, and an oil supply passage A18A and an oil supply passage B18B are provided at positions corresponding to the gear pump oil port A22A and the gear pump oil port B22B on the pump housing 2; a pair of horizontal oil inlet ports A12A and B12B are also provided on the valve body 1, and a pair of throttle reversing valve holes A14A and B14B are provided on the top surface of the valve body 1, the throttle reversing valve hole A14A is connected to the oil inlet port A12A and the oil supply passage A18A, and the throttle reversing valve hole B14B is connected to the oil inlet port B12B and the oil supply passage B18B; A throttle reversing valve A104A and a throttle reversing valve B104B are separately provided; it should be noted here that the oil supply passage A18A and the oil supply passage B18B are in the axial direction, and are in the same position as the gear pump oil port A22A and the gear pump oil port B22B, the relief valve connecting hole A310A and the relief valve connecting hole B310B, that is, after the valve body 1, the pump housing 2 and the pump seat 3 are connected, the above three holes are interconnected; in this way, when the gear pump assembly is working, the hydraulic oil source is "transferred" from side A to side B, and at the same time, the relief valve A301A and / or the relief valve B301B in the pump seat 3 "monitor" the initial pressure of the hydraulic oil source to ensure that the initial pressure meets the requirements of the system working pressure.

[0066] A balancing valve hole A13A and a balancing valve hole B13B are symmetrically formed above the main hole 1010 of the valve body 1. The balancing valve hole A13A and the balancing valve hole B13B are respectively formed with an oil return passage AⅢA and an oil return passage BⅢB leading to the outside.

[0067] A throttling oil passage AⅡA communicating with the main hole 1010 and a balancing oil passage AⅠA communicating with the balancing valve hole A13A are also transversely opened in the throttling reversing valve hole A14A.

[0068] A throttling oil passage BⅡB communicating with the main hole 1010 and a balancing oil passage BⅠB communicating with the balancing valve hole B13B are transversely opened in the throttling reversing valve hole B14B;

[0069] A working oil passage AIVA and a working oil passage BIVB are respectively opened on the hole wall of the main hole 1010 on both sides of the main valve core 1011.

[0070] It should be noted here that although the balancing valve hole is located above the main hole 1010, it is not directly connected. Instead, the throttling reversing valve core 1041 is required to control the throttling oil channel and the balancing oil channel to realize on / off.

[0071] Furthermore, the throttle reversing valve includes an adjusting screw, a throttle reversing valve spring, and a throttle reversing valve core 1041. The throttle reversing valve core 1041 includes a body that slides with the throttle reversing valve hole and a positioning rod at the bottom end of the body. Under the action of oil pressure, the throttle reversing valve core 1041 moves up and down in the throttle reversing valve hole to achieve shielding of the balance oil channel and / or the throttle oil channel. Furthermore, under the action of the adjusting screw and the throttle reversing valve spring, the throttle reversing valve core 1041 adjusts the opening and closing amount of the throttle oil channel AⅡA or BⅡB, such as Figure 20 、 21 As shown, Figure 20 The hollow arrow indicates the movement direction of the throttle reversing valve core 1041. After having the function of adjusting the opening and closing amount of the throttle oil channel AⅡA or BⅡB to control the flow of the throttle oil channel AⅡA or BⅡB, it can realize the function of adjusting the operating speed of the hydraulic cylinder (electro-hydraulic push rod).

[0072] Furthermore, in the gear pump assembly, the main shaft 4 is movably connected between the second main shaft hole 16 and the first main shaft hole 33 , and the driven shaft 43 is movably connected between the second driven shaft hole 17 and the first driven shaft hole 34 .

[0073] Furthermore, the valve body 1 , the pump housing 2 and the pump seat 3 are respectively provided with a matching connection hole 1 1001 and a connection hole 2 1002 , and positioning pins 1003 are respectively provided between the valve body 1 and the pump housing 2 and between the pump housing 2 and the pump seat 3 .

[0074] Furthermore, both oil inlet A and oil inlet B are equipped with check valves. Connection hole 1001 primarily connects the three components together with the front-end motor, while connection hole 2 1002 connects the three components together. Because both ends of the pump housing 2 require a flat seal, locating pins 1003 are provided on both ends of the pump housing 2. It is also recommended to add sealing rings for a precise flat seal connection.

[0075] Furthermore, a pressure measuring port 106 is provided on the top surface of the valve body 1 , and the pressure measuring port 106 is connected to the main hole 1010 through a pressure measuring oil passage 1061 .

[0076] Furthermore, balancing valve hole A13A, balancing valve hole B13B, throttling reversing valve hole A14A, throttling reversing valve hole B14B, relief valve hole A31A, and relief valve hole B31B are all located on the top surfaces of valve body 1 and pump base 3. After valve components are installed in these six valve holes, they are located in the same area, facilitating adjustment. Furthermore, the aforementioned pressure gauge port 106 is also located in this area, similarly facilitating adjustment.

[0077] The working principle of the present invention is as follows: Figure 17-21 As shown,

[0078] The oil inlet A12A and the oil inlet B12B are both connected to the hydraulic oil source. After the motor drives the gear pump assembly to work (the oil flows from the A side or the B side according to the forward and reverse rotation of the motor), if the driven gear 42 is Figure 17 When the pump moves clockwise, the oil inlet A12A sucks in hydraulic oil, and the hydraulic oil enters the pump chamber 21 (such as Figure 17 The hydraulic oil is then pumped into the oil supply passage B18B on the B side (indicated by the dashed arrow). Simultaneously, the hydraulic oil also enters the relief valve connection hole A310A on pump base 3, where the initial hydraulic oil pressure is regulated by the A-side relief valve A301A. During this process, due to the direction of hydraulic oil flow and the resulting negative pressure, the throttle reversing valve spool 1041 on the A side is "sucked" to the bottom of the throttle reversing valve hole A14A, preventing the hydraulic oil from flowing in the reverse direction (upward) through the A-side throttle reversing valve hole A14A.

[0079] After the hydraulic oil is pumped into the B-side oil supply channel B18B, the throttle reversing valve core 1041 on the B-side is pushed up by the pressure oil (the lifting stroke can be selected by those skilled in the art according to the actual workpiece size and the throttle reversing valve spring pressure, which will not be described here), opening the throttle oil channel BⅡB, and the hydraulic oil enters the main hole 1010 through the throttle oil channel BⅡB. After the hydraulic oil enters the main hole 1010, ( Figure 18 、 19(The left side of the device is shown in Figure 1). First, the hydraulic oil pushes open the steel ball 1013 on the B side, connecting the hydraulic oil to the working oil channel BIVB. This channel then connects to the B chamber of the electro-hydraulic push rod via the working oil port B, driving the electro-hydraulic push rod. Second, the hydraulic oil drives the main valve core 1011 to the right. The main valve core 1011, through two-stage jacking, drives the right-side check valve assembly to open the oil circuit on the A side, connecting the working oil channel AIVA to the throttling oil channel AIIA. Since the throttling reversing valve core 1041 on the A side is at the bottom, the throttling oil channel AIIA now connects to the balancing oil channel AIA via the throttling reversing valve hole A14A and enters the balancing valve hole A13A. Under the action of the balancing valve A103A, the hydraulic oil flows from the return oil channel AIIIA back to the hydraulic oil source tank. In this invention, the balancing valve primarily serves as a back pressure regulator, regulating the return oil pressure of the hydraulic cylinder (electro-hydraulic push rod) return oil chamber to prevent system jitter when under load.

[0080] Since the structure of the main valve core in the valve body 1 and the one-way valve components on both sides thereof realizes the two-way interlocking technology of the hydraulic cylinder, the inventor's earlier patent technology ("external circulation hydraulic integrated lock for electro-hydraulic push rod, 201320016060.3") is still used. In this case, the structure therein is not described in detail.

[0081] During the above working process, the hydraulic oil flow route is as follows Figure 19 、 20 As shown by the dotted arrow line in 21, the one-way valve and the main valve core are operated by Figure 19 Indicated by the solid arrow line.

[0082] The above operation process achieves the flow of oil into chamber B of the electro-hydraulic push rod (hydraulic cylinder), and the return of oil from chamber A to chamber A through the electro-hydraulic push rod pump-valve integrated assembly of the present invention. Conversely, the reverse direction of the control spindle 4 is sufficient. Regarding the initial oil pressure and rated flow rate of the present invention, those skilled in the art can select different gear pump models, power source (motor) models, and structural configurations based on the specific application.

[0083] The above description of the working principle clearly demonstrates the highly integrated electro-hydraulic pushrod pump-valve assembly of the present invention. The pump, throttle reversing valve, balancing valve, and relief valve are redesigned and re-arranged. Multiple transverse flow passages (balancing oil passage, throttle oil passage, return oil passage, and working oil passage) are utilized within a single valve block to achieve oil supply, speed regulation (throttle reversing valve), two-way interlocking, and back pressure. This results in a compact overall structure, high cost-effectiveness, stable performance, and easy installation. In operation, the system offers stable pressure and sensitive speed and throttling.

[0084] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features therein according to the disclosed technical content without creative labor, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. An electro-hydraulic push rod pump valve integrated assembly, comprising a valve body, a main hole is opened in the valve body, a main valve core is arranged in the main hole, and a one-way valve assembly is respectively arranged at both ends of the main hole, characterized in that: Also includes a pump base, gear pump assembly and pump casing; The pump housing is arranged at the front end of the valve body, and the pump housing is in a sheet shape. A pump cavity is opened in the middle of the pump housing, and a gear pump oil port A and a gear pump oil port B are opened on both sides of the middle of the pump cavity respectively; The gear pump assembly includes a main shaft, a driving gear, a driven gear and a driven shaft; the driving gear and the driven gear are meshed with each other and accommodated in a pump cavity of a pump housing; The pump seat is arranged at the front end of the pump housing, and is provided with a main shaft hole 1 and a driven shaft hole 1 in the direction of the pump housing. A relief valve connecting hole A and a relief valve connecting hole B are provided at positions corresponding to the gear pump oil port A and the gear pump oil port B on the pump housing; a pair of upright relief valve holes A and relief valve holes B are also provided on the pump seat, the relief valve hole A is connected to the relief valve connecting hole A, and the relief valve hole B is connected to the relief valve connecting hole B, and relief holes A and relief holes B are respectively provided beside the middle and lower parts of the relief valve holes A and the relief valve holes B; a relief valve A is installed in the relief valve hole A, and a relief valve B is installed in the relief valve hole B; The valve body is also provided with the following structure: A second main shaft hole and a second driven shaft hole are provided on the end surface of the valve body facing the pump housing, and an oil supply passage A and an oil supply passage B are provided at positions corresponding to the gear pump oil port A and the gear pump oil port B on the pump housing; a pair of horizontal oil inlet A and oil inlet B are also provided on the valve body, and a pair of throttling reversing valve holes A and throttling reversing valve holes B are provided on the top surface of the valve body, the throttling reversing valve hole A communicating with the oil inlet A and the oil supply passage A, and the throttling reversing valve hole B communicating with the oil inlet B and the oil supply passage B; a throttling reversing valve A and a throttling reversing valve B are provided in the throttling reversing valve hole A and the throttling reversing valve hole B, respectively; A balancing valve hole A and a balancing valve hole B are symmetrically opened above the main hole of the valve body, and the balancing valve hole A and the balancing valve hole B are respectively opened with an oil return channel A and an oil return channel B leading to the outside; A throttling oil passage A communicating with the main hole and a balancing oil passage A communicating with the balancing valve hole A are transversely opened in the throttling reversing valve hole A; A throttling oil passage B communicating with the main hole and a balancing oil passage B communicating with the balancing valve hole B are transversely opened in the throttling reversing valve hole B; A working oil channel A and a working oil channel B are respectively opened on the main hole walls on both sides of the main valve core; The throttle reversing valve includes an adjusting screw, a throttle reversing valve spring and a throttle reversing valve core. The throttle reversing valve core includes a body that slides with the throttle reversing valve hole and a positioning rod at the bottom end of the body. Under the action of oil pressure, the throttle reversing valve core moves up and down in the throttle reversing valve hole.

2. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: The throttle reversing valve core adjusts the opening and closing amount of the throttle oil channel A or B under the action of the adjusting screw and the throttle reversing valve spring.

3. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: The main shaft in the gear pump assembly is movably connected between the second main shaft hole and the first main shaft hole, and the driven shaft is movably connected between the second driven shaft hole and the first driven shaft hole.

4. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: The valve body, pump housing and pump seat are respectively provided with a first connecting hole and a second connecting hole that match each other, and positioning pins are respectively provided between the valve body and the pump housing, and between the pump housing and the pump seat.

5. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: The oil inlet A and the oil inlet B are respectively provided with a one-way valve.

6. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: A pressure measuring port is also provided on the top surface of the valve body, and the pressure measuring port is connected to the main hole through a pressure measuring oil channel.

7. The electro-hydraulic push rod pump valve integrated assembly according to claim 1, characterized in that: The balancing valve hole A, balancing valve hole B, throttling reversing valve hole A, throttling reversing valve hole B, overflow valve hole A and overflow valve hole B are all located on the top surfaces of the valve body and the pump seat.

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