A chassis integrated radial piston pump

Abstract

This utility model discloses a chassis-integrated radial piston pump, comprising at least: a carrier chassis; a drive component mounted on the carrier chassis and used to provide driving force; a transmission component mounted on the drive end of the drive component and capable of rotating under the drive of the drive component; a pumping unit mounted on the carrier chassis and in transmission cooperation with the transmission component; and an integrated flow distribution mechanism mounted on the carrier chassis and cooperating with the pumping units. Multiple pumping units are arranged in a circumferential array around the outer periphery of the transmission component. The integrated flow distribution mechanism enables integrated input or output of hydraulic oil under the action of the pumping units. This chassis-integrated radial piston pump possesses numerous advantages, including a highly compact structure, low friction loss, precise motion guidance, reliable sealing, long service life, strong applicability, and high output quality.

Description

Technical Field

[0001] This utility model belongs to the field of plunger pump technology, and more specifically, it is a chassis-integrated radial plunger pump. Background Technology

[0002] Radial piston pumps are widely used in industrial hydraulics, aerospace, and engineering machinery due to their advantages such as high operating pressure and convenient variable displacement. Their technological development has consistently focused on core objectives such as improving efficiency, reducing size, lowering noise and pulsation, and enhancing reliability. Key technical challenges lie in controlling friction and wear of the piston drive pair, ensuring smooth flow convergence among multiple cylinders, and achieving integrated and lightweight design of the overall structure. Traditional radial piston pumps often use an eccentric shaft to drive the piston and cylinder to create relative motion. The piston head and drive ring typically experience sliding friction, resulting in low mechanical efficiency and easy wear. In terms of flow distribution, axial flow distribution or a separate valve plate structure is used, leading to a longer axial dimension and a less compact structure.

[0003] As disclosed in existing patent document CN109653973A, a radial piston pump with water-lubricated shaft valve combined flow distribution is described. This pump is driven by a planar cam (or eccentric bearing) and has slippers installed on the piston heads to reduce friction. Such pumps typically include a drive unit, a drive shaft, a cam ring, multiple radially arranged pistons, and independent flow distribution valve blocks. The pistons are pushed by the cam to pressurize oil and return to their original position by springs to draw oil in. The flow distribution method often involves directly installing a check valve on each piston cylinder bore, and then converging the various outlets through external pipelines.

[0004] The aforementioned plunger pump has at least one or more of the following disadvantages: Friction and efficiency issues: Even with the use of structures such as slippers, there is still a large relative sliding speed between the plunger head and the cam ring, resulting in significant frictional losses, which restricts further improvement in the pump's mechanical efficiency and lifespan. Space utilization and structural compactness issues: The independent distribution valve block and complex external connection pipelines occupy a lot of space, resulting in large axial and radial dimensions of the entire pump unit, which makes it difficult to meet the requirements of modern equipment for miniaturization and integration of components; Motion stability issues: During the reciprocating motion of the plunger, there is a lack of effective radial motion restraint. Especially under high-speed conditions, it may wobble or move slightly due to lateral forces, affecting the life of the seals and generating vibration and noise. Stability issues of drive components: Drive components such as cams tend to move axially under high-speed rotation and periodic impact loads. If there is no effective constraint, it will affect the transmission accuracy and cause abnormal wear. Utility Model Content

[0005] The purpose of this invention is to provide a chassis-integrated radial piston pump, which can at least solve one of the existing problems.

[0006] The objective of this utility model can be achieved through the following technical solutions: A chassis-integrated radial piston pump, comprising at least: Load-bearing chassis; Drive unit, mounted on the chassis and used to provide driving force; A transmission component, mounted on the driving end of a driving component and capable of rotating under the drive of the driving component; The oil pump unit is mounted on the support chassis and is in transmission cooperation with the transmission components; An integrated flow distribution mechanism is installed on the support chassis and works in conjunction with the oil pump unit; There are multiple oil pumping units, which are distributed in a circumferential array on the outer periphery of the transmission component. The integrated flow distribution mechanism can achieve integrated input or integrated output of hydraulic oil under the action of the pump oil unit.

[0007] As a further technical solution of this utility model, each oil pump unit includes: The cylinder block is mounted on the support chassis and has a plunger bore inside. The plunger body is slidably disposed within the plunger bore; The contact body is movably mounted on the first end of the plunger body and engages with the transmission component in a low-friction sliding or rolling contact. The return spring is installed inside the plunger bore and its two ends abut against the cylinder body and the second end of the plunger body, respectively.

[0008] Therefore, the pump unit of this utility model has a low-friction sliding or rolling contact with the transmission component through a contact body that is hinged to the head of the plunger body by means of a pin or the like. Under the action of the return spring, the contact body forms a low-friction sliding friction pair or rolling friction pair with the contour surface of the transmission component. Compared with the traditional high-friction sliding friction pair such as the slipper, the coefficient of friction is reduced by an order of magnitude, which directly leads to a significant improvement in mechanical efficiency and a significant reduction in wear, thus extending the service life of the pump.

[0009] As a further technical solution of this utility model, each oil pump unit also includes: The first sealing element is fitted onto the outer circumference of the plunger body and seals against the wall of the plunger bore.

[0010] As a further technical solution of this utility model, the chassis-integrated radial piston pump also includes a top cover, which is installed directly above the supporting chassis and forms a guide structure with the supporting chassis that cooperates with the piston body.

[0011] As a further technical solution of this utility model, the guide structure includes: The guide base is set on the support chassis and corresponds one-to-one with the plunger body of multiple oil pump units; The guide top seat is set on the top cover and corresponds one-to-one with the guide base.

[0012] As a further technical solution of this utility model, a first guide semi-groove is provided on the guide base to limit and cooperate with the lower end of the plunger body, and a second guide semi-groove is provided on the guide top seat to limit and cooperate with the upper end of the plunger body. Both the first and second guide semi-grooves are coaxial with the plunger hole, and the three together form a guide channel that enables the plunger body to move precisely. Thus, the reciprocating motion of the plunger body is constrained and guided by the plunger hole, the first guide semi-groove, and the second guide semi-groove. The three together constitute a multi-layered, coaxial precision guide system, which greatly enhances the radial support stiffness of the plunger body during movement and ensures the linearity of its movement.

[0013] As a further technical solution of this utility model, the outer wall of the plunger body is provided with a guide protrusion, and the guide base and the guide top seat are spaced apart, so as to form a guide groove between them that cooperates with the guide protrusion for limiting.

[0014] As a further technical solution of this utility model, the chassis-integrated radial piston pump also includes an axial limiting component. The top cover is provided with a mounting groove that mates with the axial limiting component. The axial limiting component is installed in the mounting groove and engages with the transmission component for limiting. Thus, the axial limiting component is used to press against the upper end face of the transmission component, restricting its axial movement during rotation.

[0015] As a further technical solution of this utility model, the integrated flow distribution mechanism includes: The distribution plate is located at the bottom of the support chassis and forms an inlet manifold and an outlet manifold between the distribution plate and the support chassis. The main liquid inlet is located on the distribution plate and is connected to the liquid inlet manifold. The main liquid outlet is located on the distribution plate and is connected to the liquid outlet manifold. Liquid inlet channels are located at the bottom of each cylinder and connect to the plunger hole and the liquid inlet manifold, respectively. The liquid outlet channel is located at the bottom of each cylinder and connects to the plunger hole and the liquid outlet manifold respectively; A liquid inlet check valve is installed in the liquid inlet channel and is used to control the flow of liquid between the plunger orifice and the liquid inlet manifold. A liquid outlet check valve is installed in the liquid outlet channel and is used to control the flow of liquid between the plunger orifice and the liquid outlet manifold.

[0016] As a further technical solution of this utility model, the integrated flow distribution mechanism also includes: The second seal is disposed between the cylinder body and the supporting chassis and is at least used to achieve a sealing fit between the two and to isolate the inlet channel and the outlet channel; The third sealing element is disposed between the distribution plate and the supporting chassis and is at least used to achieve a sealing fit between the two and to isolate the inlet manifold and the outlet manifold.

[0017] As a further technical solution of this utility model, the transmission component is a non-circular cam. Therefore, the transmission component can be an elliptical cam, a trilobal cam, or other multi-segment cams. The core is to use a non-circular cam to achieve "multiple actions in a single rotation". When the transmission component is an elliptical cam, it achieves "double action in a single rotation", while a trilobal cam or other multi-segment cams achieve three or more actions in a single rotation. Its essence is to use a "higher-order ellipse" or other contours with periodic fluctuations.

[0018] The beneficial effects of this utility model are: 1. Extremely low friction loss, simultaneous improvement in efficiency and lifespan: This utility model adopts a low-friction sliding friction pair or rolling friction pair of "non-circular cam + contact body", especially the rolling friction pair of "non-circular cam + roller", which reduces the friction coefficient by an order of magnitude compared with traditional slippers, directly resulting in a significant improvement in mechanical efficiency and a substantial reduction in wear, thus extending the service life of the pump.

[0019] 2. Enhanced structural rigidity and smooth, reliable operation: The combined frame structure of "top cover + load-bearing chassis" not only constrains the movement of transmission components, but more importantly, it provides precise radial guidance for the plunger body, greatly improving the rigidity and stability of the entire motion system, resulting in lower operating noise and longer sealing life.

[0020] 3. Extremely high power density and space utilization: "Single-turn multiple action" doubles or even several times the displacement, while the integrated flow distribution design eliminates external pipelines and valve blocks. The combination of the two allows this radial piston pump to output greater flow and power under the same external dimensions, or to be smaller in size under the same power, making it very suitable for space-constrained applications.

[0021] 4. Stable output flow: Driven by the transmission components, the oil discharge strokes of multiple plungers are staggered and more dense, eventually merging into a continuous flow field with minimal pulsation in the liquid outlet manifold, thus improving output quality.

[0022] In summary, the chassis-integrated radial piston pump of this utility model has at least many advantages, including highly compact structure, low friction loss, precise motion guidance, reliable sealing, long service life, strong applicability, and high output quality. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the chassis-integrated radial piston pump of this utility model; Figure 2 yes Figure 1 The diagram shows a bottom view of the chassis-integrated radial piston pump. Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the chassis-integrated radial piston pump along the AA direction. Figure 4 This is an exploded structural diagram of the chassis-integrated radial piston pump of this utility model; Figure 5 yes Figure 1 The diagram shows a three-dimensional structure of the chassis-integrated radial piston pump after omitting some structural components. Figure 6 yes Figure 5 The diagram shown is a three-dimensional structural representation of the chassis-integrated radial piston pump with some parts omitted. Figure 7 This is a three-dimensional structural diagram of the load-bearing chassis of this utility model; Figure 8 This is a three-dimensional structural diagram of the top cover of this utility model; Figure 9 This is a schematic diagram showing the distribution of the third sealing element of this utility model on the supporting chassis; Figure 10 This is a three-dimensional structural diagram of the distribution plate of this utility model.

[0025] In the diagram: 1-Carrier chassis; 2-Drive component; 3-Transmission component; 4-Pump unit; 5-Integrated distribution mechanism; 6-Top cover; 7-Axial limiting component; 101-Guide base; 102-Guide groove; 401-Cylinder body; 402-Plunger body; 403-Contact body; 404-Return spring; 405-First seal; 501-Distribution plate; 502-Main inlet; 503-Main outlet; 5 04-Inlet channel; 505-Outlet channel; 506-Inlet check valve; 507-Outlet check valve; 508-Second seal; 509-Third seal; 5010-Inlet manifold; 5011-Outlet manifold; 601-Guide top seat; 602-Mounting groove; 101a-First guide half-groove; 401a-Plunger hole; 402a-Guide protrusion; 601a-Second guide half-groove. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] like Figure 1-10 As shown, this utility model schematically discloses a chassis-integrated radial piston pump, the core of which includes: Carrying chassis 1; Drive unit 2 is mounted on the support chassis 1 and is used to provide driving force; Transmission component 3 is installed on the driving end of drive component 2 and can rotate under the drive of drive component 2; The oil pump unit 4 is installed on the support chassis 1 and is in transmission cooperation with the transmission component 3; The integrated flow distribution mechanism 5 is installed on the supporting chassis 1 and cooperates with the oil pump unit 4. The integrated flow distribution mechanism 5 can realize the integrated input or integrated output of hydraulic oil under the action of the oil pump unit 4.

[0028] Preferably, the transmission component 3 is a non-circular cam. Thus, the transmission component 3 can be an elliptical cam, a trilobal cam, or other multi-segment cams. The core is to use a non-circular cam to achieve "multiple actions in a single rotation". When the transmission component 3 is an elliptical cam, it achieves "double action in a single rotation", while a trilobal cam or other multi-segment cams achieve three or more actions in a single rotation. Its essence is to use a "higher-order ellipse" or other contours with periodic fluctuations.

[0029] As a further preferred embodiment, an elliptical cam is used for illustration.

[0030] Preferably, there are multiple oil pumping units 4, which are distributed in a circular array on the outer periphery of the transmission component 3. As a further preferred embodiment, there are 8 oil pump units 4, which are distributed in a circular array with the center of the supporting chassis 1 as the center.

[0031] Preferably, each pump unit 4 includes: Cylinder block 401 is mounted on the support chassis 1 and has a plunger hole 401a inside; The plunger body 402 is slidably disposed within the plunger bore 401a; Contact body 403 is movably mounted on the first end of plunger body 402 and has low-friction sliding or rolling contact with transmission component 3; The return spring 404 is installed in the plunger hole 401a and its two ends abut against the cylinder body 401 and the second end of the plunger body 402, respectively.

[0032] Therefore, the pump unit 4 of this utility model has a low-friction sliding or rolling contact with the transmission component 3 through the contact body 403 set at the head of the plunger body 402. Under the action of the return spring 404, the contact body 403 forms a low-friction sliding friction pair or rolling friction pair with the contour surface of the transmission component 3. Compared with the traditional high-friction sliding friction pair such as the slipper, the coefficient of friction is reduced by an order of magnitude, which directly brings about a significant improvement in mechanical efficiency and a significant reduction in wear, thus extending the service life of the pump.

[0033] Preferably, the contact body 403 can be a roller hinged to the head of the plunger body 402 by a pin, or it can be a needle roller bearing or a sliding bearing directly mounted on the head of the plunger body 402, as long as it can form an effective rolling contact or a low-friction sliding contact with the transmission component 3.

[0034] As a further preferred embodiment, this example uses a roller as the contact body 403 for illustration.

[0035] Preferably, each pump unit 4 also includes: The first sealing element 405 is fitted around the outer periphery of the plunger body 402 and seals against the wall of the plunger hole 401a.

[0036] Preferably, the chassis-integrated radial piston pump also includes a top cover 6, which is installed directly above the supporting chassis 1 and forms a guide structure with the supporting chassis 1 that cooperates with the piston body 402.

[0037] Preferably, the top cover 6 can be connected to the supporting chassis 1 either by the support columns at the four corners or by being directly tightened by long screws passing under the supporting chassis 1.

[0038] As a further preferred embodiment, this example illustrates the connection between the top cover 6 and the chassis via support columns at the four corners.

[0039] As a preferred embodiment, the guiding structure includes: The guide base 101 is set on the support chassis 1 and corresponds one-to-one with the plunger body 402 of the multiple oil pumping units 4; The guide top seat 601 is set on the top cover 6 and corresponds one-to-one with the guide base 101.

[0040] Preferably, the guide base 101 has a first guide groove 101a that fits into the lower end of the plunger body 402, and the guide top seat 601 has a second guide groove 601a that fits into the upper end of the plunger body 402. Both the first guide groove 101a and the second guide groove 601a are coaxial with the plunger hole 401a, and together they form a guide channel that enables the plunger body 402 to move precisely. Thus, the reciprocating motion of the plunger body 402 is constrained and guided by the plunger hole 401a, the first guide groove 101a, and the second guide groove 601a. ​​These three elements together constitute a multi-layered, coaxial precision guide system, greatly enhancing the radial support stiffness of the plunger body 402 during movement and ensuring the linearity of its motion.

[0041] As a further preferred option, self-lubricating bushings or linear bearings may also be installed in the first guide half-groove 101a and the second guide half-groove 601a to further optimize guiding performance and durability.

[0042] Preferably, the outer wall of the plunger body 402 is provided with a guide protrusion 402a, and the guide base 101 and the guide top seat 601 are spaced apart, thereby forming a guide groove 102 between them that cooperates with the guide protrusion 402a for limiting. This can enhance the guiding and limiting functions.

[0043] Preferably, the chassis-integrated radial piston pump also includes an axial limiting member 7. The top cover 6 is provided with a mounting groove 602 that mates with the axial limiting member 7. The axial limiting member 7 is installed in the mounting groove 602 and engages with the transmission member 3. Thus, the axial limiting member 7 is used to press against the upper end face of the transmission member 3, restricting its axial movement during rotation.

[0044] As a further preferred option, the axial limiting member 7 is a bearing-type clamping member, specifically a one-way thrust ball bearing manufactured by SKF (such as an SKF BA3 bearing).

[0045] Preferably, the integrated flow distribution mechanism 5 includes: The distribution plate 501 is disposed at the bottom of the support base 1 and forms an inlet manifold 5010 and an outlet manifold 5011 between it and the support base 1; The main liquid inlet 502 is located on the distribution plate 501 and is connected to the liquid inlet manifold 5010; The main liquid outlet 503 is located on the distribution plate 501 and is connected to the liquid outlet manifold 5011; Liquid inlet channel 504 is opened at the bottom of each cylinder 401 and connects to plunger hole 401a and liquid inlet manifold 5010 respectively; The liquid outlet channel 505 is opened at the bottom of each cylinder 401 and is connected to the plunger hole 401a and the liquid outlet manifold 5011 respectively. A liquid inlet check valve 506 is installed in the liquid inlet channel 504 and is used to control the on / off flow of liquid between the plunger orifice 401a and the liquid inlet manifold 5010. The liquid outlet check valve 507 is installed in the liquid outlet channel 505 and is used to control the opening and closing of the liquid path between the plunger orifice 401a and the liquid outlet manifold 5011.

[0046] As a further preferred embodiment, the inlet manifold 5010 and the outlet manifold 5011 can be formed in the following ways: Two concentric annular grooves are machined on the upper surface of the supporting chassis 1 to form an inlet manifold and an outlet manifold, respectively. Then, the distribution plate 501 is fixed to the back of the supporting chassis 1 by fasteners. The distribution plate 501 and the back of the chassis together form an inlet manifold 5010 and an outlet manifold 5011.

[0047] As a further preferred option, the inlet check valve 506 and the outlet check valve 507 can be various forms such as spring check valves, umbrella valves, ball valves or cone valves, and the selection depends on the specific flow rate, response speed and cost requirements.

[0048] Preferably, the integrated flow distribution mechanism 5 also includes: The second seal 508 is disposed between the cylinder body 401 and the supporting chassis 1 and can at least be used to achieve a sealing fit between the two and to isolate the liquid inlet channel 504 and the liquid outlet channel 505. The third sealing element 509 is disposed between the distribution plate 501 and the supporting chassis 1 and can at least be used to achieve a sealing fit between the two and to isolate the inlet manifold 5010 and the outlet manifold 5011.

[0049] As a further preferred embodiment, the second sealing element 508 is an "8"-shaped sealing ring, and the corresponding bearing chassis 1 has an "8"-shaped sealing ring groove for embedded installation of the second sealing element 508.

[0050] As a further preferred embodiment, the third sealing element 509 includes three concentric annular sealing rings: an inner ring, a middle ring, and an outer ring. The middle sealing ring is precisely located between the inlet manifold and the outlet manifold to achieve high-pressure isolation.

[0051] As a further preferred embodiment, the first sealing element 405, the second sealing element 508, and the third sealing element 509 in this embodiment can all be sealing rings made of materials such as polytetrafluoroethylene (PTFE).

[0052] The working process of the radial plunger pump of this utility model is as follows: The driving component 2 drives the transmission component 3 to rotate. When the transmission component 3 pushes the plunger body 402 of a certain oil pump unit 4 to move outward, the volume of the plunger hole 401a in the cylinder 401 corresponding to the plunger body 402 decreases, the liquid pressure increases, and the liquid outlet check valve 507 is opened. The high-pressure liquid is discharged from the main liquid outlet 503 through the liquid outlet manifold 5011. Similarly, when the transmission component 3 pushes the plunger body 402 of a certain oil pumping unit 4 to move inward, the volume of the plunger hole 401a in the cylinder 401 corresponding to the plunger body 402 increases, forming a negative pressure, which opens the liquid inlet check valve 506, and the liquid is drawn in from the main liquid inlet 502 and enters the plunger hole 401a through the liquid inlet manifold 5010. For each revolution of the drive unit 2, each plunger body 402 completes two oil suction and discharge cycles (corresponding to the elliptical cam). The eight plunger bodies 402 are staggered in phase, and their discharged oil is superimposed into a smooth liquid flow within the liquid outlet manifold.

[0053] The advantages of this invention over the prior art are: 1. Extremely low friction loss, simultaneous improvement in efficiency and lifespan: This utility model adopts a low-friction sliding friction pair or rolling friction pair of "non-circular cam + contact body 403", especially the rolling friction pair of "non-circular cam + roller", which reduces the friction coefficient by an order of magnitude compared with traditional slippers, directly resulting in a significant improvement in mechanical efficiency and a substantial reduction in wear, thus extending the service life of the pump.

[0054] 2. Enhanced structural rigidity and smooth, reliable operation: The combined frame structure of "top cover 6 + load-bearing chassis 1" not only constrains the movement of the transmission component 3, but more importantly, it provides precise radial guidance for the plunger body 402, which greatly improves the rigidity and stability of the entire motion system, resulting in lower operating noise and longer sealing life.

[0055] 3. Extremely high power density and space utilization: "Single-turn multiple action" doubles or even several times the displacement, while the integrated flow distribution design eliminates external pipelines and valve blocks. The combination of the two allows this radial piston pump to output greater flow and power under the same external dimensions, or to be smaller in size under the same power, making it very suitable for space-constrained applications.

[0056] 4. Stable output flow: Under the drive of the transmission component 3, the multiple plungers 402 have staggered and more densely spaced oil discharge strokes, which eventually converge into a continuous flow field with minimal pulsation in the liquid outlet manifold 5011, thus improving the output quality.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A chassis-integrated radial piston pump, characterized in that, At least including: Carrying chassis (1); A drive unit (2) is mounted on the supporting chassis (1) and is used to provide driving force; The transmission component (3) is installed at the driving end of the driving component (2) and is capable of rotating under the drive of the driving component (2); The oil pump unit (4) is installed on the supporting chassis (1) and is in transmission cooperation with the transmission component (3); An integrated flow distribution mechanism (5) is installed on the supporting chassis (1) and cooperates with the oil pump unit (4); There are multiple pumping units (4), and the multiple pumping units (4) are distributed in a circumferential array on the outer periphery of the transmission component (3); The integrated flow distribution mechanism (5) can realize the integrated input or integrated output of hydraulic oil under the action of the pump oil unit (4).

2. The chassis-integrated radial piston pump according to claim 1, characterized in that, Each of the aforementioned oil pump units (4) includes: The cylinder body (401) is mounted on the supporting chassis (1) and has a plunger hole (401a) inside; A plunger body (402) is slidably disposed within the plunger bore (401a); The contact body (403) is movably mounted on the first end of the plunger body (402) and engages with the transmission member (3) in a low-friction sliding or rolling contact. The return spring (404) is installed in the plunger hole (401a) and its two ends abut against the cylinder (401) and the second end of the plunger body (402), respectively.

3. The chassis-integrated radial piston pump according to claim 2, characterized in that, Each of the aforementioned oil pump units (4) further includes: The first sealing element (405) is fitted around the outer periphery of the plunger body (402) and seals against the wall of the plunger hole (401a).

4. The chassis-integrated radial piston pump according to claim 2, characterized in that, It also includes a top cover (6), which is installed directly above the support chassis (1) and forms a guide structure with the support chassis (1) that cooperates with the plunger body (402).

5. The chassis-integrated radial piston pump according to claim 4, characterized in that, The guiding structure includes: A guide base (101) is disposed on the bearing chassis (1) and corresponds one-to-one with the plunger bodies (402) of the plurality of oil pumping units (4); A guide top seat (601) is disposed on the top cover (6) and corresponds one-to-one with the guide base (101).

6. The chassis-integrated radial piston pump according to claim 5, characterized in that, The guide base (101) has a first guide semi-groove (101a) that is matched with the lower end of the plunger body (402), and the guide top seat (601) has a second guide semi-groove (601a) that is matched with the upper end of the plunger body (402). The first guide semi-groove (101a) and the second guide semi-groove (601a) are both coaxial with the plunger hole (401a) and the three together form a guide channel that enables the plunger body (402) to move precisely.

7. The chassis-integrated radial piston pump according to any one of claims 4-6, characterized in that, It also includes an axial limiting member (7), and the top cover (6) is provided with a mounting groove (602) that cooperates with the axial limiting member (7). The axial limiting member (7) is installed in the mounting groove (602) and is limited to cooperate with the transmission member (3).

8. The chassis-integrated radial piston pump according to any one of claims 2-6, characterized in that, The integrated flow distribution mechanism (5) includes: A distribution plate (501) is disposed at the bottom of the supporting chassis (1) and forms an inlet manifold (5010) and an outlet manifold (5011) between it and the supporting chassis (1); The main liquid inlet (502) is located on the distribution plate (501) and is connected to the liquid inlet manifold (5010); The main outlet (503) is located on the distribution plate (501) and is connected to the outlet manifold (5011); Liquid inlet channel (504) is provided at the bottom of each cylinder (401) and is respectively connected to the plunger hole (401a) and the liquid inlet manifold (5010); The liquid outlet channel (505) is opened at the bottom of each of the cylinders (401) and connects the plunger hole (401a) and the liquid outlet manifold (5011) respectively; A liquid inlet check valve (506) is installed in the liquid inlet channel (504) and is used to control the flow of liquid between the plunger orifice (401a) and the liquid inlet manifold (5010). A liquid outlet check valve (507) is installed in the liquid outlet channel (505) and is used to control the on / off flow of liquid between the plunger orifice (401a) and the liquid outlet manifold (5011).

9. A chassis-integrated radial piston pump according to claim 8, characterized in that, The integrated flow distribution mechanism (5) also includes: The second seal (508) is disposed between the cylinder (401) and the supporting chassis (1) and is at least used to achieve a sealing fit between the two and to isolate the liquid inlet channel (504) and the liquid outlet channel (505); The third sealing element (509) is disposed between the distribution plate (501) and the supporting chassis (1) and is at least used to achieve a sealing fit between the two and to isolate the inlet manifold (5010) and the outlet manifold (5011).

10. The chassis-integrated radial piston pump according to any one of claims 1-6, characterized in that, The transmission component (3) is a non-circular cam.

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