Integrated low-noise motor pump set for oil source

Abstract

The utility model discloses an integrated low-noise motor pump set for an oil source, which belongs to the related technical field of hydraulic systems and comprises a servo motor, a hydraulic pump and a valve block. Therefore, the servo motor, the hydraulic pump and the valve block can be directly assembled and connected into an integral structure. The integrated low-noise motor pump set for the oil source is compact in structure and convenient to assemble, sealing assembly among the hydraulic pump, the servo motor and the valve block can be achieved, nodes needing connecting assembly are reduced, the sealing performance and reliability of a system after assembly are improved, the occupied space of the hydraulic system after assembly is reduced, and the cost is reduced. And the comprehensive performance of the motor pump set and the hydraulic system is improved, and good use value and application prospects are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to hydraulic systems, and in particular relates to a low-noise motor pump group for an integrated oil source. Background Art

[0002] Hydraulic systems are widely used in industrial production and daily life. Generally speaking, hydraulic systems mainly rely on motors to drive hydraulic pumps to provide power oil sources, and complete corresponding hydraulic transmission operations by changing the oil pressure in the hydraulic system.

[0003] For hydraulic systems, they are often inseparable from the integrated setting of servo motors and hydraulic pumps. For the traditional setting form, the servo motor and hydraulic pump are connected through a bell jar, an elastic coupling is used to achieve centering compensation, and a connecting pipe is set at the outlet of the hydraulic pump to connect with the valve group. Although this method can meet the setting requirements of the hydraulic system to a certain extent, it also has disadvantages such as high installation requirements, large occupied volume and noise. In addition, there are many leakage points and poor reliability after the system is set up, which makes it difficult to meet the efficient and stable application requirements of the hydraulic system. Utility Model Content

[0004] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the utility model provides a low-noise motor pump group for an integrated oil source, which can effectively realize the integrated setting of a servo motor, a hydraulic pump and a valve group, meet the setting requirements of the hydraulic system, and at the same time greatly reduce the assembly volume of the equipment, ensure the reliability of the equipment, and improve the comprehensive performance of the equipment.

[0005] To achieve the above-mentioned purpose, the utility model provides an integrated low-noise motor pump group for oil source, which includes a servo motor, a hydraulic pump and a valve block;

[0006] One end of the servo motor is set as a pump body assembly end, the motor output shaft of the servo motor extends out of the pump body assembly end, and a positioning convex portion is protrudingly provided on the end surface of the pump body assembly end; the motor output shaft passes through the end surface of the positioning convex portion, and a first installation groove for installing a skeleton seal is provided around the motor output shaft on the end surface of the positioning convex portion;

[0007] The hydraulic pump comprises a first housing and a second housing which are sealed and assembled, a shaft hole for the motor output shaft to pass through is coaxially opened in the middle of the two housings, and a first oil hole and a second oil hole for oil to enter and exit are opened on the first housing; and

[0008] The two opposite ends of the two shells are respectively in conformal design with the pump body assembly end and the valve block; wherein, a positioning groove for embedding the pump body assembly end is provided at one end of the second shell facing away from the first shell, and a special-shaped convex part is protruded at one end of the first shell facing away from the second shell; correspondingly, a conformal assembly groove corresponding to the outer contour of the special-shaped convex part is provided on the end face of the valve block, and the special-shaped convex part is just embedded in the conformal assembly groove, and oil passage holes communicating with the corresponding oil holes on the first shell are respectively provided at the bottom of the conformal assembly groove.

[0009] As a further improvement of the present utility model, an oil leakage flow channel is provided in the through-length section of the protruding positioning convex part of the motor output shaft, and one or more oil leakage holes communicating with the oil leakage flow channel are provided on the outer circumference of the motor output shaft corresponding to the first installation groove.

[0010] As a further improvement of the present utility model, the oil leakage flow channel is coaxially provided at the central part of the motor output shaft; and / or, the oil leakage holes are arranged along the radial direction of the motor output shaft.

[0011] As a further improvement of the present utility model, a second installation groove is provided on the end face of the positioning convex part around the first installation groove in the circumferential direction for accommodating an O-ring and realizing sealing with the bottom surface of the positioning groove.

[0012] As a further improvement of the present utility model, at least one first sealing groove for accommodating an O-ring is provided on the opposite end faces of the first shell and the second shell in the circumferential direction.

[0013] As a further improvement of the present utility model, a second sealing groove is provided on the end face of the second shell around the positioning groove for accommodating an O-ring or for embedding and matching with a ring-shaped positioning protrusion provided on the end face of the pump body assembly end.

[0014] As a further improvement of the present utility model, the cross-section of the special-shaped convex part is circular, and

[0015] the outer diameter of the special-shaped convex part gradually decreases from the end face of the first shell outwards; or, the outer diameter of the special-shaped convex part gradually decreases by a section from the end face of the first shell outwards and then remains unchanged.

[0016] As a further improvement of the present utility model, the length of the motor output shaft protruding from the pump body assembly end is not less than the axial length of the hydraulic pump.

[0017] As a further improvement of the present utility model, the valve block is a valve group integrally provided with a plurality of conformal assembly grooves, and a servo motor and a hydraulic pump after assembly connection are respectively provided corresponding to each conformal assembly groove.

[0018] As long as the above-mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0019] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present utility model include:

[0020] (1) The integrated oil source low-noise motor pump unit of the present utility model includes a servo motor, a hydraulic pump and a valve block. By using the conformal design between the two ends of the hydraulic pump housing and the end of the servo motor and the end face of the valve block respectively, the servo motor, the hydraulic pump and the valve block can be directly assembled and connected into an integral structure, simplifying the assembly process of the hydraulic system, improving the compactness of the system assembly, reducing the number of connection parts and joints that may be generated during the installation process of the hydraulic system, reducing the number of leakage points, reducing the volume of the hydraulic system after installation, and improving the stability and reliability of the system.

[0021] (2) The integrated oil source low-noise motor pump unit of the present utility model can effectively realize the rapid discharge of the leaked oil by arranging an installation groove at the end of the servo motor and correspondingly arranging a skeleton seal, and then by means of the combined arrangement of the oil drain hole and the oil drain channel on the motor output shaft, avoiding the oil from entering the servo motor, reducing the leakage of the hydraulic oil in the system, and improving the service performance of the hydraulic system.

[0022] (3) The integrated oil source low-noise motor pump unit of the present utility model can further improve the sealing performance after the assembly connection of the device by arranging sealing grooves between the first housing and the second housing, between the first housing and the valve block, and between the second housing and the pump body assembly end, and correspondingly arranging sealing rings, reducing the leakage of the hydraulic oil after the device connection, and ensuring the stable operation of the hydraulic system.

[0023] (4) The integrated oil source low-noise motor pump unit in the present utility model has a compact structure and convenient assembly, can realize the sealed assembly between the hydraulic pump, the servo motor and the valve block, reduce the nodes that need to be connected and assembled, improve the sealing performance and reliability after the system assembly, reduce the occupied space after the installation of the hydraulic system, improve the comprehensive performance of the motor pump unit and the hydraulic system, and has good use value and application prospects. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the integrated oil source low-noise motor pump unit in the embodiment of the present utility model;

[0026] Figure 2 is the axial sectional view of the low-noise motor pump unit for the integrated oil source in the embodiment of the present utility model;

[0027] Figure 3 is the exploded view of the structure of the low-noise motor pump unit for the integrated oil source in the embodiment of the present utility model;

[0028] Figure 4 is the right-angled sectional view of the low-noise motor pump unit for the integrated oil source in the embodiment of the present utility model;

[0029] Figure 5 is the partial structural schematic diagram of the servo motor of the motor pump unit in the embodiment of the present utility model;

[0030] Figure 6 is the structural schematic diagram of the first housing of the hydraulic pump of the motor pump unit in the embodiment of the present utility model;

[0031] Figure 7 、 Figure 8 is the structural schematic diagram of the second housing of the hydraulic pump of the motor pump unit in the embodiment of the present utility model;

[0032] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0033] 1, servo motor; 2, hydraulic pump; 3, valve block;

[0034] 101, motor output shaft; 102, pump body assembly end; 103, positioning convex part; 104, first installation groove; 105, second installation groove; 106, oil drain hole; 107, oil drain channel; 201, first housing; 2011, first oil hole; 2012, second oil hole; 2013, special-shaped convex part; 2014, first sealing groove; 202, second housing; 2022, positioning groove; 2023, second sealing groove; 2024, rotating shaft hole; 2025, third sealing groove; 301, oil passage hole; 302, conformal assembly groove. Detailed implementation manners

[0035] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] In the description of the present utility model, it should be understood that unless otherwise clearly specified and defined, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] Embodiment:

[0041] Please refer to Figures 1 to 8, in the preferred embodiment of the present utility model, the integrated oil source low-noise motor pump unit includes a servo motor 1, a hydraulic pump 2 and a valve block 3 which are highly integrated. Among them, both ends of the hydraulic pump 2 are conformally designed and connected to the end of the servo motor 1 and the end face of the valve block 3 to form an integral body, and a motor pump unit is formed after the servo motor 1 is connected to the hydraulic pump 2.

[0042] It should be noted that the valve block 3 in the preferred embodiment is a component integrated with various pipeline channels and valve bodies, and is used to form a pipeline system connected to the motor pump unit and having corresponding valve body control functions.

[0043] It can be understood that according to the actual use requirements, the valve block 3 can be set in one-to-one correspondence with the motor pump unit, or the functions of multiple valve blocks 3 can be integrated on a valve group, and the valve group is combined with multiple motor pump units to form a hydraulic system with complex functions.

[0044] Specifically, the overall structural sectional view of the motor pump unit in the preferred embodiment is as shown in Figure 2 and the structural explosion view is as shown in Figure 3 . It can be seen from this that the servo motor 1 in the preferred embodiment includes a pump body assembly end 102 that can be conformally connected to one end of the hydraulic pump 2, and the motor output shaft 101 of the servo motor 1 protrudes from the end face of the pump body assembly end 102 so as to be conveniently assembled and connected to the hydraulic pump 2.

[0045] In actual setting, the protruding length of the motor output shaft 101 corresponds to the axial dimension of the hydraulic pump 2, and it is further preferably not less than the axial length of the hydraulic pump 2, so that after the servo motor 1 and the hydraulic pump 2 are integrally assembled, the motor output shaft 101 can extend to the back side end face of the hydraulic pump 2, as shown in Figure 4 .

[0046] Furthermore, a positioning convex portion 103 is provided on the end face of the pump body assembly end 102 corresponding to the conformal connection with one end of the hydraulic pump 2, as shown in Figure 5 . By embedding and aligning the positioning convex portion 103 with the positioning groove 2022 provided at the end of the hydraulic pump 2, rapid alignment during the assembly of the two can be achieved.

[0047] It can be understood that in actual setting, the pump body assembly end 102 can be formed on the end cover at one end of the servo motor 1, and the conformal connection with the hydraulic pump 2 is completed by using the design of the end cover.

[0048] More specifically, the positioning convex portion 103 in the preferred embodiment has a circular structure, and a first installation groove 104 is provided on its surface around the motor output shaft 101 in the circumferential direction for the installation of a skeleton seal, ensuring that the hydraulic oil leaking to the servo motor 1 side along the surface of the motor output shaft 101 can be isolated by the skeleton seal to prevent the hydraulic oil from entering the servo motor 1.

[0049] Accordingly, in order to prevent the hydraulic oil from leaking from the assembly gap between the servo motor 1 and the hydraulic pump 2, a second mounting groove 105 is preferably provided in the circumferential direction on the surface of the positioning protrusion 103 for the end face seal. In actual arrangement, the second mounting groove 105 is preferably coaxially arranged with the first mounting groove 104 and the motor output shaft 101, so as to fully ensure the leakage of the oil leaking from the outer periphery of the motor output shaft 101 in the radial direction of the device.

[0050] Furthermore, in order to discharge the leaked oil, an oil leakage channel 107 is opened in the through-length area where the motor output shaft 101 extends out of the pump body assembly end 102, and it is further preferably coaxially opened at the center position of the motor output shaft 101; accordingly, at least one oil leakage hole 106 connected to the oil leakage channel 107 is opened on the outer periphery of the motor output shaft 101 corresponding to the first mounting groove 104, and the oil leakage hole 106 is further preferably opened radially.

[0051] Through the combined arrangement of the oil drain hole 106 and the oil drain channel 107 , the oil that has seeped into the first mounting groove 104 can be quickly discharged through the oil drain channel 107 , thereby ensuring the reliability and stability of the hydraulic system arrangement and use.

[0052] Furthermore, the hydraulic pump 2 in the preferred embodiment is as follows Figure 3 As shown in , it includes a first shell 201 and a second shell 202 arranged coaxially, wherein the end of the second shell 202 facing away from the first shell 201 can be conformally connected to the pump body assembly end 102 of the servo motor 1, and the end of the first shell 201 facing away from the second shell 202 can be conformally connected to the valve block 3.

[0053] For the first housing 201 and the second housing 202 in the preferred embodiment, the two can be assembled and connected after being coaxially arranged, and a shaft hole is coaxially opened in the middle of the two housings for coaxial assembly of the motor output shaft 101, for example Figure 3 Meanwhile, a receiving hole is provided on one side of the second housing 202 facing the first housing 201 for receiving the corresponding working components of the hydraulic pump.

[0054] In actual configuration, the hydraulic pump 2 in the preferred embodiment can be configured as a gear pump, a plunger pump or a vane pump, or other forms of hydraulic pumps as required, which will not be described in detail here.

[0055] Through the assembly connection between the first housing 201 and the second housing 202 , the corresponding working components of different types of hydraulic pumps can be accurately arranged in the accommodating hole.

[0056] In a specific preferred embodiment, the hydraulic pump is a gear pump. At this time, a gear ring assembly is arranged in the accommodating hole, and the end of the motor output shaft 101 is preferably assembled and connected to the gear in the gear ring assembly through a flat key or a spline to achieve the synchronous movement of the gear and the motor output shaft 101. The movement of the gear drives the movement of the gear ring, and then the increase and decrease of the cavity volume are formed through the meshing movement of the gear and the gear ring, and finally the oil suction and discharge operation is realized.

[0057] Of course, it can be understood that in the above specific preferred embodiment, components such as a crescent plate are also correspondingly arranged in the accommodating groove, and the axes of the gear and the gear ring are arranged in parallel and spaced apart by a certain distance. This can be completed by using the assembly technology of the hydraulic pump 2 in the prior art and is not the focus of attention of the present invention, so it will not be elaborated here.

[0058] Furthermore, corresponding to the inlet and outlet of the oil in the hydraulic pump 2, a first oil hole 2011 and a second oil hole 2012 are penetrated and arranged on the first housing 201, as Figure 6 shown, for the input and the pressurized output of the hydraulic oil.

[0059] For example, in a preferred embodiment, the first oil hole 2011 is an oil inlet hole for the input of low-pressure oil; the second oil hole 2012 is an oil outlet hole for the output of high-pressure oil.

[0060] In addition, the side of the first housing 201 facing away from the second housing 202 is used for assembling and connecting with the valve block 3. To ensure the reliability of the assembly connection between the two, in a preferred embodiment, a special-shaped convex portion 2013 is arranged on the end face of this side of the first housing 201, and it protrudes from the end face of the first housing 201.

[0061] In a preferred embodiment, the special-shaped convex portion 2013 preferably has a circular structure, and its outer diameter gradually decreases from the end face of the first housing 201 outward, or first gradually decreases from the end face outward for a certain section and then remains unchanged. For example, Figure 3 shown, a convex structure with a special-shaped cross-section is formed. At this time, the first oil hole 2011 and the second oil hole 2012 are opened on the end face of the special-shaped convex portion 2013.

[0062] More specifically, a first sealing groove 2014 is opened circumferentially on the end face of the special-shaped convex portion 2013, which can be used to accommodate an O-ring, and thus the sealing after the assembly of the special-shaped convex portion 2013 and the end face of the valve block 3 is realized, as Figure 6 shown.

[0063] At the same time, for the second housing 202 in the preferred embodiment, its structural form is as Figure 7 、 Figure 8As shown, the end face on the side of the second housing 202 facing away from the first housing 201 is used for conformal assembly with the pump body assembly end 102. A positioning groove 2022 is provided in the middle of this end face, and its set size corresponds to the pump body assembly end 102, so that the pump body assembly end 102 can just be embedded into the positioning groove 2022.

[0064] Preferably, a second sealing groove 2023 is also provided circumferentially along the outer periphery of the positioning groove 2022 on this side end face of the second housing 202 for accommodating an O-ring seal, further improving the sealing performance of the assembly connection between the second housing 202 and the end of the servo motor 1.

[0065] Of course, in actual setting, the above-mentioned second sealing groove 2023 can be further preferably a positioning groove. At this time, a positioning protrusion is provided protruding from the end of the servo motor 1, and this positioning protrusion is arranged in the area outside the pump body assembly end 102 and can be correspondingly embedded into the aforementioned positioning groove when the second housing 202 is assembled with the end of the servo motor 1.

[0066] In actual setting, on the end faces of the first housing 201 and the second housing 202 that are aligned with each other, at least one end face is provided with a sealing groove circumferentially, and an O-ring seal is embedded therein to improve the sealing performance after the two housings are assembled and connected. For example, in the Figure 8 shown preferred embodiment, a circular third sealing groove 2025 is provided on the end face of the second housing 202 facing the first housing 201, and a circular sealing ring can be correspondingly arranged therein.

[0067] Furthermore, in the preferred embodiment, corresponding to the design of the first housing 201, a conformal assembly groove 302 is provided on the end face of the valve block 3, which corresponds to the outer contour of the special-shaped convex part 2013, and corresponding oil passage holes 301 are provided at the bottom of the conformal assembly groove 302 corresponding to the first oil hole 2011 and the second oil hole 2012, thereby realizing the conduction between the motor pump unit and the hydraulic system.

[0068] In actual setting, the setting form of the valve block 3 can be preferably designed according to needs. For example, it is set in the form of a valve group, which can be compatible with the integrated setting of two or more motor pump units, thereby reducing the setting of hydraulic system pipelines, simplifying the assembly process, and improving the assembly accuracy.

[0069] The integrated oil source low-noise motor pump unit in the present utility model has a compact structure and convenient assembly. It can realize the sealed assembly between the hydraulic pump, the servo motor, and the valve block, reduce the connection and assembly nodes, improve the sealing performance and reliability after the system is assembled, reduce the occupied space after the hydraulic system is assembled and set, improve the comprehensive performance of the motor pump unit and the hydraulic system, and has good use value and application prospects.

[0070] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An integrated low-noise motor pump set for oil source, characterized in that: Includes servo motor, hydraulic pump and valve block; One end of the servo motor is set as a pump body assembly end, the motor output shaft of the servo motor extends out of the pump body assembly end, and a positioning convex portion is protrudingly provided on the end surface of the pump body assembly end; the motor output shaft passes through the end surface of the positioning convex portion, and a first installation groove for installing a skeleton seal is provided around the motor output shaft on the end surface of the positioning convex portion; The hydraulic pump comprises a first housing and a second housing which are sealed and assembled, a shaft hole for the motor output shaft to pass through is coaxially opened in the middle of the two housings, and a first oil hole and a second oil hole for oil to enter and exit are opened on the first housing; and The two ends of the two shells facing away from each other are respectively conformally designed with the pump body assembly end and the valve block; wherein, a positioning groove for embedding the pump body assembly end is provided at one end of the second shell facing away from the first shell, and a special-shaped convex portion is protrudingly provided at one end of the first shell facing away from the second shell; accordingly, a conformal assembly groove corresponding to the outer contour of the special-shaped convex portion is provided on the end face of the valve block, the special-shaped convex portion is just embedded in the conformal assembly groove, and oil path holes connected to the corresponding oil holes on the first shell are respectively provided at the bottom of the conformal assembly groove.

2. The integrated low-noise motor pump unit for oil source according to claim 1, characterized in that: An oil drain channel is provided in the through-length section of the protruding positioning convex portion of the motor output shaft, and one or more oil drain holes communicating with the oil drain channel are provided on the outer periphery of the motor output shaft corresponding to the first mounting groove.

3. The integrated low-noise motor pump set for oil source according to claim 2, characterized in that: The oil leakage channel is coaxially opened at the central part of the motor output shaft; and / or the oil leakage hole is arranged along the radial direction of the motor output shaft.

4. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: A second installation groove is formed on the end surface of the positioning protrusion in an annular direction around the first installation groove, and is used to accommodate an O-ring and achieve sealing with the bottom surface of the positioning groove.

5. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: At least one first sealing groove for accommodating an O-ring is formed in an annular direction on two end surfaces of the first shell and the second shell that face each other.

6. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: A second sealing groove is provided on the end surface of the second shell around the positioning groove, which is used to accommodate an O-ring or to be embedded and matched with a ring-shaped positioning protrusion provided on the assembly end surface of the pump body.

7. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: The cross section of the special-shaped convex portion is circular, and The outer diameter of the special-shaped protrusion decreases outward from the end surface of the first shell; or, the outer diameter of the special-shaped protrusion decreases outward from the end surface of the first shell for a period of time and then remains unchanged.

8. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: The length of the motor output shaft protruding from the pump body assembly end is not less than the axial length of the hydraulic pump.

9. The integrated low-noise motor pump unit for oil source according to any one of claims 1 to 3, characterized in that: The valve block is a valve group with a plurality of conformal assembly grooves integrated therein, and a servo motor and a hydraulic pump are respectively provided in correspondence with each conformal assembly groove after being assembled and connected.

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