A radial piston pump with adjustable pump oil volume

Abstract

The present application relates to a radial piston pump with adjustable oil flow, which relates to the technical field of hydraulic pumps. The pump comprises a housing and a hydraulic cylinder, wherein a plurality of hydraulic cylinders are evenly mounted on the housing, a plunger is mounted in the hydraulic cylinder, a limiting device is mounted on the side wall of the housing, an input shaft is mounted on the limiting device, the limiting device is used to radially adjust the position of the input shaft along the side wall of the housing, and one end of the input shaft passes through the limiting device and extends into the housing. A universal joint is provided at the end of the input shaft not mounted in the housing, and the input shaft is connected to a motor via the universal joint. An oil distributor is mounted on the rear end of the housing, an oil inlet and an oil return port are provided on the hydraulic cylinder, and an oil inlet pipe and an oil return pipe are provided on the oil distributor. The oil inlet pipe is connected to the oil inlet, and the oil return pipe is connected to the oil return port. A first oil check valve is mounted in the oil inlet, and a second oil check valve is mounted in the oil return port. The present application has the effect of achieving variable control of the oil flow of the plunger pump.

Description

Technical Field

[0001] The present application relates to the field of hydraulic pump technology, and in particular to a radial piston pump with adjustable pump oil volume. Background Art

[0002] With the rapid development of modern industry, the requirements for efficiency and reliability of mechanical equipment are becoming increasingly higher. As one of the core components of fluid transmission systems, radial piston pumps are widely used in many industries due to their high pressure and large flow characteristics.

[0003] Existing radial piston pumps are usually provided with an input shaft and an eccentric wheel. The input shaft is connected to the eccentric wheel, and the input shaft drives the eccentric wheel to rotate. The rotation of the eccentric wheel squeezes multiple plungers to make reciprocating motion in the wall to absorb and discharge oil.

[0004] However, since the input shaft and the eccentric are fixed, the rotation radius of the eccentric is always displaced, which results in a constant reciprocating distance of the plunger in the hydraulic cylinder, making it impossible to use variable control of the oil pumping amount of the plunger pump. Summary of the Invention

[0005] In order to achieve variable control of the oil pumping volume of a plunger pump, the present application provides a radial plunger pump with adjustable oil pumping volume.

[0006] The radial piston pump with adjustable pump oil volume provided in this application adopts the following technical solution:

[0007] A radial piston pump with adjustable pump oil volume comprises a housing and a hydraulic cylinder, several hydraulic cylinders are evenly mounted on the housing, plungers are mounted in the hydraulic cylinders, a limiting device is mounted on the side wall of the housing, the input shaft is mounted on the limiting device, the limiting device is used to radially adjust the position of the input shaft along the side wall of the housing, and one end of the input shaft passes through the limiting device and extends into the housing, a universal connection mechanism is provided at the end of the input shaft not mounted in the housing, the input shaft is connected to the motor through the universal connection mechanism, an oil distributor is mounted at the rear end of the housing, an oil inlet and an oil return port are provided on the hydraulic cylinder, an oil inlet pipe and an oil return pipe are provided on the oil distributor, the oil inlet pipe is connected to the oil inlet, the oil return pipe is connected to the oil return port, a first oil stop valve is installed in the oil inlet, and a second oil stop valve is installed in the oil return port.

[0008] By adopting the above technical solution, a limit device is installed on the side wall of the shell, so that the input shaft can be adjusted radially along the side wall of the shell, thereby realizing variable control of the oil pumping amount of the plunger pump and improving the adaptability and flexibility of the equipment; the input shaft is connected to the motor through a universal joint mechanism, so that the input shaft can stably transmit power at different angles, thereby enhancing the reliability of the equipment and reducing wear caused by vibration or angle changes; the oil inlet and oil return port arranged on the hydraulic cylinder are connected to the oil inlet pipe and oil return pipe on the oil distributor, ensuring smooth flow of oil, effectively preventing oil blockage and leakage, and improving the operating efficiency of the system; the first oil stop valve and the second oil stop valve installed in the oil inlet and oil return port respectively can effectively prevent oil backflow, ensure the safety and stability of the system, and extend the service life of the equipment.

[0009] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0010] By adopting this technical solution, the limiter device can precisely adjust the position of the extrusion plate, allowing the plunger pump to flexibly adjust the oil volume under different operating conditions, improving the adaptability and flexibility of the equipment. Furthermore, the drive connection between the limiter screw and the extrusion plate slider allows for precise control of the radial movement of the extrusion plate, ensuring the stability of the plunger pump during operation, reducing wear caused by mechanical vibration, and extending the service life of the equipment. Furthermore, the rotating connection design of the adjustment block makes adjustment operations more convenient and improves maintenance efficiency.

[0011] In a specific possible implementation scheme, the adjustment block is configured to be columnar, and the adjustment block sliding groove is radially opened along the end surface of the adjustment block.

[0012] By adopting this technical solution, the adjustment block is designed as a columnar shape, with the adjustment block slot radially extending along the end face of the adjustment block. This allows for precise adjustment of the squeeze disc position, ensuring effective control of the plunger pump's oil volume under various operating conditions, improving pumping efficiency and reliability. Furthermore, the columnar design of the adjustment block makes the adjustment process more stable, reduces mechanical wear caused by adjustment, and extends the service life of the equipment.

[0013] In a specific feasible implementation scheme, the universal connection mechanism includes a connecting rod, a telescopic rod, a limit block and a universal ball. There are four limit blocks, which are respectively installed at one end of the connecting rod, both ends of the telescopic rod and one end of the input shaft outside the shell. There are two universal balls, which are respectively located between the connecting rod and the telescopic rod and between the telescopic rod and the input shaft. A cross groove is provided on the universal ball. The limit blocks installed on the connecting rod and the telescopic rod are vertically arranged in the cross groove on one of the universal balls, and the limit blocks installed on the telescopic rod and the input shaft are vertically arranged in the cross groove on the other universal ball. The limit blocks are slidably connected in the cross groove.

[0014] By adopting this technical solution, the universal joint design allows the input shaft to connect to the motor at various angles, increasing the input shaft's degrees of freedom and enhancing the device's adaptability and flexibility. Furthermore, the coordination of the stopper and universal ball joint ensures a stable and reliable connection, preventing loosening or failure due to angle variations. Furthermore, this design effectively reduces vibration and shock, minimizing wear and tear on the device and extending its service life.

[0015] In a specific possible implementation scheme, the telescopic rod includes a first rod body and a second rod body, a rod body slot is provided at one end of the first rod body, one end of the second rod body is slidingly connected to the rod body slot, the second rod body is slidingly connected to the rod body slot and a rod body spline is provided on the outer wall of one end, a rod body limiting groove is provided in the rod body slot, and the cylinder body spline is slidingly connected in the rod body limiting groove.

[0016] By adopting this technical solution, the telescopic rod design enables stable connection to the input shaft at various positions, ensuring a reliable connection between the input shaft and the motor. Furthermore, the sliding connection between the first and second rods, combined with the coordination between the rod splines and the rod retaining grooves, effectively prevents the telescopic rod from twisting or dislodging during movement, improving the stability and reliability of the system. Furthermore, this design can also, to a certain extent, absorb and cushion the vibration and impact caused by changes in the input shaft's position, further reducing wear and extending the service life of the equipment.

[0017] In a specific feasible implementation scheme, the first oil stop valve includes an oil stop ring, an oil stop spring, and an oil stop plug. The oil stop ring is installed at the upper opening of the oil inlet, and the oil stop plug is slidably connected in the oil inlet. One end of the oil stop spring is connected to the end of the oil stop plug away from the oil stop ring, and the other end of the oil stop spring is connected to the side wall of the lower end of the oil inlet. The second oil stop valve is arranged with the same structure as the first oil stop valve, and the second oil stop valve is installed in the oil return port in the opposite installation form of the first oil stop valve.

[0018] By adopting the above-mentioned technical solution, the first and second oil stop valves can effectively prevent the hydraulic oil from flowing back when not in operation, ensuring the stability and reliability of the system. Specifically, the oil stop ring is installed at the upper opening of the oil inlet, the oil stop plug is slidably connected inside the oil inlet, one end of the oil stop spring is connected to the end of the oil stop plug facing away from the oil stop ring, and the other end of the oil stop spring is connected to the side wall of the lower end of the oil inlet. This structure allows the oil stop plug to be pushed open when the hydraulic oil enters the oil inlet, allowing the hydraulic oil to enter the hydraulic cylinder smoothly. When the hydraulic oil stops flowing or flows in the reverse direction, the oil stop spring pushes the oil stop plug against the oil stop ring to prevent the hydraulic oil from flowing back. Similarly, the second oil stop valve is installed in the return oil port in the opposite manner, performing the same oil-stopping function, further improving the safety and efficiency of the entire system.

[0019] In a specific possible implementation scheme, the oil stop ring is chamfered adjacent to one end of the oil stop plug, the upper end of the oil stop plug is chamfered corresponding to the oil stop ring, and the maximum outer diameter of the oil stop plug is larger than the maximum inner diameter of the oil stop ring.

[0020] By adopting this technical solution, the chamfered design between the oil stop ring and the oil stop plug allows the oil stop plug to enter the oil stop ring more smoothly when closing, reducing friction between the two and improving the oil stop plug's response speed and sealing performance. Furthermore, the maximum outer diameter of the oil stop plug is larger than the maximum inner diameter of the oil stop ring, ensuring that the oil stop plug can completely block the oil inlet or return port when closed, preventing oil leakage and improving system reliability.

[0021] In a specific possible implementation scheme, an oil passage groove is provided on the outer side wall of the oil stop plug, and a plurality of the oil passage grooves are provided, and the plurality of the oil passage grooves are evenly provided on the circumferential portion of the side wall of the oil stop plug.

[0022] By adopting this technical solution, the multiple oil passages on the outer wall of the oil stopper allow for temporary storage of some oil when the stopper is closed. When the stopper is opened, this oil can be quickly replenished into the hydraulic cylinder, minimizing oil supply delays and improving pump efficiency. Furthermore, the oil passages reduce friction between the stopper and the oil inlet, minimizing wear and extending service life.

[0023] In a specific embodiment, a front sealing cover is detachably connected to an end of the housing away from the oil distributor, and a rear sealing cover is detachably connected to an end of the housing close to the oil distributor.

[0024] The detachable connection between the front and rear sealing covers makes maintenance and repair more convenient and quicker by adopting this technical solution. Internal components can be replaced or repaired without disassembling the entire pump body, thus improving the reliability and service life of the equipment. This design also effectively prevents foreign matter from entering the pump body, reducing wear and tear, and improving the pump's operating efficiency and stability.

[0025] In a specific possible implementation scheme, a cylinder cover is fixedly connected to the hydraulic cylinder, and a sealing gasket is sealed between the hydraulic cylinder and the cylinder cover.

[0026] By adopting this technical solution, the sealed connection between the hydraulic cylinder and the cylinder head can effectively prevent liquid leakage and improve system reliability. At the same time, the fixed connection of the cylinder head enhances the stability of the entire structure, reduces wear caused by vibration, and extends the service life of the equipment.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] By adjusting the input shaft position through the limit device, variable control of the oil pumping amount of the plunger pump is achieved, which improves the adaptability and flexibility of the pump under different working conditions;

[0029] The introduction of the universal joint mechanism effectively reduces the mechanical stress caused by the change of the input shaft position, reduces wear and tear, and extends the service life of the equipment;

[0030] The design of the first oil stop valve and the second oil stop valve ensures the smooth flow of fluid and the stability of the system, prevents oil leakage and improves overall reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of an embodiment of the present application.

[0032] Figure 2 This is a left view of an embodiment of the present application.

[0033] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0034] Figure 4 It is a structural diagram of the limiting device.

[0035] Figure 5 It is a cross-sectional view showing the connection relationship between the limit device and the extrusion disk.

[0036] Figure 6This is a structural diagram of the universal connection mechanism of an embodiment of the present application.

[0037] Figure 7 It is a fracture cross-sectional view showing the installation positions of the first oil stop pump and the second oil stop pump.

[0038] Explanation of reference numerals: 1. housing; 11. front sealing cover; 12. rear sealing cover; 2. hydraulic cylinder; 21. oil inlet; 22. oil return port; 3. plunger; 4. limiting device; 41. input shaft; 42. adjusting block; 421. adjusting block slide; 43. turntable; 431. turntable slide; 44. limiting screw; 5. universal joint; 51. connecting rod; 52. telescopic rod; 521. first rod body; 5211. rod Body slide groove; 5212, rod body limit groove; 522, second rod body; 5221, rod body spline; 53, limit block; 54, universal ball; 541, cross slide; 6, oil distributor; 61, oil inlet pipe; 62, oil return pipe; 7, first oil stop valve; 71, oil stop ring; 72, oil stop spring; 73, oil stop plug; 731, oil groove; 8, second oil stop valve; 9, cylinder head; 10, extrusion plate; 101, extrusion plate slider. DETAILED DESCRIPTION

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0041] An embodiment of the present application discloses a radial piston pump with adjustable pump oil volume.

[0042] like Figure 1 and Figure 2As shown, the anti-overload low-wear radial piston 3 pump includes a housing 1 and a hydraulic cylinder 2, and several hydraulic cylinders 2 are evenly installed on the housing 1. It is characterized by: it also includes a limit device 4 and an extrusion plate 10, a plunger 3 is installed in the hydraulic cylinder 2, the plunger 3 is slidably connected in the hydraulic cylinder 2, and a roller is provided at one end of the plunger 3 adjacent to the extrusion plate 10, and is sealed with the side wall of the hydraulic cylinder 2, a limit spring is installed in the hydraulic cylinder 2, one end of the limit spring is connected to the inner wall of the hydraulic cylinder 2, and the other end of the limit spring is connected to the plunger 3, the limit device 4 is installed on the side wall of the housing 1, and the extrusion plate 10 is installed in the housing 1 through the limit device 4, and the limit device 4 is used to move along The side wall of the shell 1 radially adjusts the position of the extrusion disk 10, and a universal connection mechanism 5 is provided on the limit device 4. The limit device 4 is connected to the motor through the universal connection mechanism 5. An oil distributor 6 is installed at the rear end of the shell 1, and an oil inlet 21 and an oil return port 22 are provided on the hydraulic cylinder 2. An oil inlet pipe 61 and an oil return pipe 62 are provided on the oil distributor 6. The oil inlet pipe 61 is connected to the oil inlet 21, and the oil return pipe 62 is connected to the oil return port 22. A first oil stop valve 7 is installed in the oil inlet 21, and a second oil stop valve 8 is installed in the oil return port 22.

[0043] A front sealing plate is detachably connected to the end of the housing 1 away from the oil distributor 6, and a rear sealing plate is detachably connected to the end of the housing 1 near the oil distributor 6. The front and rear sealing plates can be made of metal, such as stainless steel or aluminum alloy, to improve sealing and corrosion resistance. They can be bolted to the housing 1 for easy assembly and disassembly and maintenance.

[0044] A cylinder head 9 is fixedly connected to the hydraulic cylinder 2, with a sealing gasket sealing the connection between the two. The cylinder head 9 can be made of metal, such as cast iron or aluminum alloy, to improve rigidity and pressure resistance. The sealing gasket can be made of rubber or silicone to achieve a good sealing effect. The cylinder head 9 and the hydraulic cylinder 2 can be fixed with bolts to ensure a secure connection.

[0045] like Figure 3 and Figure 5As shown, the limiting device 4 includes an input shaft 41, an adjusting block 42, a rotary disk 43, and a limiting screw 44. The adjusting block 42 is rotatably connected to the side wall of the housing 1 and extends into the housing 1. The turntable 43 is mounted on one end of the housing 1. The adjustment block 42 is provided in the housing 1 and has an adjustment block 42 slot. The extrusion plate 10 has a corresponding extrusion plate 10 slot. The extrusion plate 10 is provided with an extrusion plate slider 101. The extrusion plate slider 101 passes through the extrusion plate 10 slot and is slidably connected to the adjustment block 42 slot. The limit screw 44 is rotatably connected to the limit block 53 located on the side wall of the outer end of the housing 1 and extends into the adjustment block 42 slot. The limit screw 44 is driven by the extrusion plate slider 101. The limit screw 44 has scale lines set along the length of the limit screw 44, so that the oil volume of the adjustment pump can be judged by observing the height of the limit screw 44. The input shaft 41 is mounted on the limit block 53 at one end outside the housing 1. The input shaft 41 can be selected from a standard motor shaft or a customized high-strength alloy steel shaft to ensure its stability and durability during high-speed operation. Adjustment block 42 can be made of high-strength aluminum alloy or stainless steel to ensure fatigue resistance during long-term use. Turntable 43 can be made of cast iron or engineering plastics, which offer excellent wear resistance and shock absorption. Limit screw 44 can be precision-machined stainless steel to ensure accuracy during fine adjustments.

[0046] like Figure 6 As shown, the universal connection mechanism 5 includes a connecting rod 51, a telescopic rod 52, a stopper 53, and a universal ball 54. Four stoppers 53 are provided, and are respectively mounted at one end of the connecting rod 51, both ends of the telescopic rod 52, and the end of the input shaft 41 located outside the housing 1. Two universal balls 54 are provided, and are respectively located between the connecting rod 51 and the telescopic rod 52, and between the telescopic rod 52 and the input shaft 41. The universal balls 54 are provided with a cross groove 541. The stoppers 53 mounted on the connecting rod 51 and the telescopic rod 52 are perpendicularly arranged in the cross groove 541 of one universal ball 54, while the stoppers 53 mounted on the telescopic rod 52 and the input shaft 41 are perpendicularly arranged in the cross groove 541 of the other universal ball 54. The stoppers 53 are slidably connected in the cross groove 541. The connecting rod 51 and the telescopic rod 52 can be made of high-strength alloy steel to increase strength and durability. The universal ball 54 can be made of ceramic material to reduce wear and improve precision. The limit block 53 can be fixed to the connecting rod 51, the telescopic rod 52 and the input shaft 41 by welding or threading to ensure the stability of the connection.

[0047] The design of the universal joint 5 allows the input shaft 41 to connect to the motor at various angles, increasing the input shaft's freedom of movement and enhancing the device's adaptability and flexibility. Furthermore, the coordination between the stopper 53 and the universal ball 54 ensures a stable and reliable connection, preventing loosening or failure due to angle variations. Furthermore, this design effectively reduces vibration and shock, minimizing wear and tear on the device and extending its service life.

[0048] The telescopic rod 52 comprises a first rod 521 and a second rod 522. A rod slot 5211 is defined at one end of the first rod 521, and one end of the second rod 522 is slidably connected within the slot 5211. A rod spline 5221 is provided on the outer wall of the second rod 522. A rod retaining groove 5212 is defined within the slot 5211, and the rod spline 5221 is slidably connected within the retaining groove 5212. The design of the rod slot 5211 and the retaining groove 5212 ensures linear motion of the telescopic rod 52, preventing jamming and deflection. The rod spline 5221 can be a trapezoidal spline to increase contact area and torque transmission capability.

[0049] The design of the telescopic rod 52 enables stable connection to the input shaft 41 in various positions, ensuring a reliable connection between the input shaft 41 and the motor. Furthermore, the sliding connection between the first and second rods 521, 522, coupled with the mating of the rod splines 5221 and the rod retaining grooves 5212, effectively prevents the telescopic rod 52 from twisting or dislodging during movement, thereby improving the stability and reliability of the system. Furthermore, this design can also, to a certain extent, absorb and cushion the vibration and impact caused by the positional changes of the input shaft 41, further reducing wear and tear on the equipment and extending its service life.

[0050] like Figure 7As shown, the first oil stop valve 7 includes an oil stop ring 71, an oil stop spring 72, and an oil stop plug 73. The oil stop ring 71 is installed at the upper opening of the oil inlet 21, and the oil stop plug 73 is slidably connected to the oil inlet 21. One end of the oil stop spring 72 is connected to the end of the oil stop plug 73 facing away from the oil stop ring 71, and the other end of the oil stop spring 72 is connected to the side wall of the lower end of the oil inlet 21. The oil stop ring 71 can be made of cemented carbide to improve wear resistance and pressure resistance. The oil stop plug 73 can be made of rubber or plastic to achieve a good sealing effect. The oil stop spring 72 can be a highly elastic stainless steel spring to ensure the quick response and reliability of the oil stop plug 73. The oil stop ring 71 is chamfered at one end adjacent to the oil stop plug 73, and the upper end of the oil stop plug 73 is chamfered corresponding to the oil stop ring 71. The maximum outer diameter of the oil stop plug 73 is larger than the maximum inner diameter of the oil stop ring 71. This can effectively prevent the oil stop plug 73 from being pushed out by high-pressure oil. The outer wall of the oil stopper 73 is provided with a plurality of oil grooves 731, which are evenly distributed around the circumference of the oil stopper 73 to ensure uniform distribution and flow of the oil. The second oil stop valve 8 has the same structure as the first oil stop valve 7 and is installed in the oil return port 22 in an opposite manner to the first oil stop valve 7.

[0051] The implementation principle of the overload-proof and low-wear radial piston 3 pump in the embodiment of the present application is as follows: through the design of the limiting device 4 and the universal connection mechanism 5, the flexible adjustment of the position of the input shaft 41 is achieved, thereby changing the reciprocating motion distance of the piston 3 in the hydraulic cylinder 2, and achieving the effect of variable control. The use of sealing plates and sealing rings improves the sealing and reliability of the pump. The design of the universal ball 54 and the limiting block 53 ensures the smooth movement of the input shaft 41, reduces wear and failure rate. The design of the oil stop valve effectively prevents oil leakage and ensures the efficient operation of the pump. The detachable connection between the front sealing plate and the rear sealing plate facilitates maintenance and overhaul. The use of the cylinder head 9 and the sealing gasket ensures the sealing and safety of the hydraulic cylinder 2. Overall, this embodiment effectively solves the problems existing in the traditional radial piston 3 pump, improves the adaptability and flexibility of the pump, and meets the needs of modern industry for efficient and reliable equipment.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A radial piston pump with adjustable pump oil volume, comprising a housing (1) and a hydraulic cylinder (2), wherein a plurality of the hydraulic cylinders (2) are evenly mounted on the housing (1), and characterized in that: The invention also includes a limit device (4) and an extrusion plate (10), wherein a plunger (3) is installed in the hydraulic cylinder (2), the limit device (4) is installed on the side wall of the housing (1), and the extrusion plate (10) is installed in the housing (1) through the limit device (4), and the limit device (4) is used to radially adjust the position of the extrusion plate (10) along the side wall of the housing (1). The limit device (4) is provided with a universal connection mechanism (5), and the limit device (4) is connected to the motor through the universal connection mechanism (5). An oil distributor (6) is installed at the rear end of the housing (1), and an oil inlet (21) and an oil return port (22) are provided on the hydraulic cylinder (2). The oil distributor ( 6) is provided with an oil inlet pipe (61) and an oil return pipe (62), the oil inlet pipe (61) is connected to the oil inlet port (21), the oil return pipe (62) is connected to the oil return port (22), a first oil stop valve (7) is installed in the oil inlet port (21), and a second oil stop valve (8) is installed in the oil return port (22); the limiting device (4) comprises an input shaft (41), an adjusting block (42), a rotating disk (43), and a limiting screw (44), the adjusting block (42) is rotatably connected to the side wall of the shell (1) and extends to be set in the shell (1), the rotating disk (43) is installed at one end in the shell (1), the adjusting block (42) is provided in the shell (1) and an adjusting block slide is opened. The extrusion disk (10) is provided with an extrusion disk slider (101), and a turntable slide (431) is provided on the turntable (43) corresponding to the adjustment block slide (421). The extrusion disk slider (101) passes through the turntable slide (431) and is slidably connected in the adjustment block slide (421). The limiting screw (44) is drivingly connected to the extrusion disk slider (101). The limiting screw (44) is provided with a scale line, which is set along the height direction of the limiting screw (44). The position of the extrusion disk slider (101) is judged by the scale line; the universal connection mechanism (5) includes a connecting rod (51), a telescopic rod (52), a limit block (53) and A universal ball (54) is provided, and the limit blocks (53) are provided with four. The four limit blocks (53) are respectively installed at one end of the connecting rod (51), both ends of the telescopic rod (52) and the end of the input shaft (41) outside the shell (1). The limit screw (44) is rotatably connected to the side wall of the limit block (53) outside the shell (1) and extends into the adjustment block slot (421). The input shaft (41) is installed at the end of the limit block (53) outside the shell (1). Two universal balls (54) are provided, and the two universal balls (54) are respectively located between the connecting rod (51) and the telescopic rod (52) and between the telescopic rod (52) and the input shaft (41).

2. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The regulating block (42) is configured to be columnar, and the regulating block sliding groove (421) is radially opened along the end surface of the regulating block (42).

3. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: A cross slot (541) is provided on the universal ball (54); a limit block (53) installed on the connecting rod (51) and the telescopic rod (52) is vertically arranged in the cross slot (541) on one universal ball (54); a limit block (53) installed on the telescopic rod (52) and the input shaft (41) is vertically arranged in the cross slot (541) on the other universal ball (54); and the limit block (53) is slidably connected in the cross slot (541).

4. The radial piston pump with adjustable pump oil volume according to claim 3, characterized in that: The telescopic rod (52) includes a first rod body (521) and a second rod body (522), wherein one end of the first rod body (521) is provided with a rod body sliding groove (5211), and one end of the second rod body (522) is slidably connected in the rod body sliding groove (5211), and the inner side wall of the second rod body (522) is provided with a rod body spline (5221), and a rod body limiting groove (5212) is provided in the rod body sliding groove (5211), and the rod body spline (5221) is slidably connected in the rod body limiting groove (5212).

5. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The first oil stop valve (7) comprises an oil stop ring (71), an oil stop spring (72), and an oil stop plug (73); the oil stop ring (71) is installed at the upper opening of the oil inlet (21); the oil stop plug (73) is slidably connected in the oil inlet (21); one end of the oil stop spring (72) is connected to the end of the oil stop plug (73) away from the oil stop ring (71); the other end of the oil stop spring (72) is connected to the side wall of the lower end of the oil inlet (21); the second oil stop valve (8) is arranged in the same structure as the first oil stop valve (7); and the second oil stop valve (8) is installed in the oil return port (22) in the opposite installation form of the first oil stop valve (7).

6. The radial piston pump with adjustable pump oil volume according to claim 5, characterized in that: The oil stop ring (71) is chamfered adjacent to one end of the oil stop plug (73), the upper end of the oil stop plug (73) is chamfered corresponding to the oil stop ring (71), and the maximum outer diameter of the oil stop plug (73) is greater than the maximum inner diameter of the oil stop ring (71).

7. The radial piston pump with adjustable pump oil volume according to claim 5, characterized in that: An oil passage groove (731) is provided on the outer side wall of the oil stop plug (73), and a plurality of the oil passage grooves (731) are provided. The plurality of the oil passage grooves (731) are evenly provided on the circumferential portion of the side wall of the oil stop plug (73).

8. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The end of the housing (1) away from the oil distributor (6) is detachably connected to a front sealing cover (11), and the end of the housing (1) close to the oil distributor (6) is detachably connected to a rear sealing cover (12).

9. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: A cylinder cover (9) is fixedly connected to the hydraulic cylinder (2), and a sealing gasket is sealed between the hydraulic cylinder (2) and the cylinder cover (9).

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