Motor hydraulic driving system

Abstract

The utility model provides a motor hydraulic driving system, and relates to the field of pumps. The structure comprises a first housing which is internally provided with a mounting cavity and is provided with an electric control piece; the electric control part is arranged in the mounting cavity, the motors are arranged in the mounting cavity at intervals and electrically connected with the electric control part, and the motors are correspondingly connected with the pump assemblies. The at least two motors are arranged in the mounting cavity of the first shell, the structure is compact, the occupied space is reduced, the first shell provides protection for the motors, all the motors are coaxially and correspondingly connected with the pump assemblies, precise control over the pump assemblies is achieved, every two adjacent pump assemblies do not interfere with each other, and the operation efficiency of the pump assemblies is improved. Therefore, according to the motor hydraulic driving system in the embodiment of the invention, each pump assembly is accurately controlled through each motor, the output torque is ensured, the overall structure is simple and compact, and the occupied space is reduced.

Description

Technical Field

[0001] The present application relates to the field of pumps, and in particular to a motor hydraulic drive system. Background Art

[0002] Construction machinery incorporates a variety of hydraulic systems, including working devices, steering systems, transmission systems, braking systems, and pilot systems. These systems are controlled and regulated by multiple hydraulic pumps. Because each hydraulic system operates differently, they may operate simultaneously or in a time-sharing manner.

[0003] In the prior art, a large-volume, high-power electric motor drives multiple hydraulic pumps, and each hydraulic pump is connected to the electric motor in series or in parallel.

[0004] However, when the systems work at the same time, they are prone to mutual interference, resulting in a high failure rate and reduced efficiency. Utility Model Content

[0005] The present application provides a motor hydraulic drive system to solve the problem that when various systems work simultaneously, the hydraulic pumps will compete for driving resources, easily interfere with each other, have a high failure rate, reduce efficiency, and the motor is large in size and has poor flexibility.

[0006] In order to achieve the above objectives, the technical solutions of this application are as follows:

[0007] The present application provides a motor hydraulic drive system, comprising: a first shell, the first shell having an installation cavity, and an electrical control component provided on the first shell; at least two motors, each motor being arranged in the installation cavity at intervals, each motor being electrically connected to the electrical control component, and at least two pump assemblies, each motor being correspondingly connected to each pump assembly.

[0008] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, a barrier is provided in the first shell, and the barrier is provided in the installation cavity to separate and form at least two motor cavities, and the motor cavity is used to place the motor accordingly.

[0009] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the barrier member includes a plug-in portion and at least two guide portions, each guide portion is arranged at intervals on the inner wall of the first shell, the plug-in portion is slidably connected to the guide portion, and the plug-in portion slides along the extension direction of the guide portion.

[0010] In a possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the plug-in portion has at least two connecting portions, which are connected to the inner side wall of the first shell to separate and form at least two motor cavities.

[0011] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, a connecting hole is provided on the first shell, the connecting hole is connected to the installation cavity, and the electrical connector of the motor is connected to the electrical control unit through the connecting hole.

[0012] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the first shell includes a main body and an end cover, the main body has an installation cavity, and the end cover is provided on the main body to close the installation cavity.

[0013] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the first shell further includes a first connecting member and a second connecting member, the first connecting member is provided on both the main body and the end cover, and the second connecting member is detachably connected to the first connecting member.

[0014] In a possible implementation, in the motor hydraulic drive system in the embodiment of the present application, at least a portion of the inner wall of the mounting cavity abuts against the outer wall of the motor.

[0015] In one possible implementation, the motor hydraulic drive system in the embodiment of the present application has at least two second shells, each of which has a cavity therein, and the cavity is used to place the motor. Each second shell is arranged on two opposite sides of the first shell, and the area of ​​the cavity is smaller than the area of ​​the motor cavity. The motor cavities in the first shell are symmetrically arranged along the center of the first shell.

[0016] In a possible implementation, the motor hydraulic drive system in the embodiment of the present application further includes a reduction assembly, which is used to be detachably connected to the motor, and the reduction assembly is located between the motor and the pump assembly.

[0017] The present application provides a motor hydraulic drive system, which is provided with a first housing, a mounting cavity in the first housing, and an electric control unit on the first housing; at least two motors, each motor is arranged in the mounting cavity at intervals, and each motor is electrically connected to the electric control unit; at least two pump assemblies, each motor is coaxially connected to each pump assembly. By arranging at least two motors in the mounting cavity of the first housing, the structure is compact and the occupied space is reduced. The first housing provides protection for the motors, and each motor is coaxially connected to the pump assembly to achieve precise control of the pump assembly, and the two adjacent pump assemblies do not interfere with each other, thereby improving the efficiency of the pump assembly operation. Therefore, the motor hydraulic drive system in the embodiment of the present application accurately controls each pump assembly through each motor to ensure output torque, and the overall structure is simple and compact, which reduces the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1A schematic diagram of the structure of the motor hydraulic drive system provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 Cross-section of the middle CC;

[0021] Figure 3 for Figure 1 Cross-section of the middle AA;

[0022] Figure 4 for Figure 1 Cross-section of the middle BB;

[0023] Figure 5 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 1 ;

[0024] Figure 6 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 2 ;

[0025] Figure 7 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 3 ;

[0026] Figure 8 This is a schematic diagram of the operating principles of the motor and pump assembly in the motor hydraulic drive system provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100-housing;

[0029] 110-Electrical controls;

[0030] 120 - barrier member; 121 - plug-in portion; 122 - second partition; 123 - connection portion;

[0031] 130-Ontology;

[0032] 140-end cover;

[0033] 150-guide portion;

[0034] 160-connection hole;

[0035] 170-installation cavity;

[0036] 200-motor;

[0037] 300-Pump assembly;

[0038] 400-reduction assembly.

[0039] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0040] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0041] It should be noted that in the description of the embodiments of the present application, terms such as "upper", "lower", "inside", and "outside" indicating orientation or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description, and do not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0042] In addition, it should be noted that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0044] Construction machinery incorporates a variety of hydraulic systems, including working devices, steering systems, transmission systems, braking systems, and pilot systems. These systems typically utilize a single electric motor driving multiple hydraulic pumps. Because each hydraulic system operates differently, they may operate simultaneously or in a time-sharing manner.

[0045] In existing technology, a single electric motor drives multiple hydraulic pumps, each connected in series or in parallel to the motor. However, competition for resources between the systems inevitably reduces overall efficiency. Furthermore, connecting multiple pumps in series results in excessive overhangs and a high failure rate.

[0046] In view of this, an embodiment of the present application provides a motor hydraulic drive system, comprising: a housing, a mounting cavity 170 is provided in the housing, the housing includes an electrical control unit; at least two motors, each motor is spaced apart and arranged in the mounting cavity 170, and each motor is electrically connected to the electrical control unit; at least two pump assemblies, each motor is coaxially connected to each pump assembly. By arranging at least two motors in the mounting cavity 170 of the housing, the structure is compact and the occupied space is reduced. The housing provides protection for the motors, and each motor is coaxially connected to the pump assembly to achieve precise control of the pump assembly, and adjacent pump assemblies do not interfere with each other, thereby improving the efficiency of the pump assembly operation. Therefore, the motor hydraulic drive system in the embodiment of the present application accurately controls each pump assembly through each motor to ensure output torque, and the overall structure is simple and compact, which reduces the occupied space.

[0047] The following combination Figures 1 to 8 The present application is described in detail with reference to the accompanying drawings and specific embodiments. Figure 1 A schematic diagram of the structure of the motor hydraulic drive system provided in an embodiment of the present application; Figure 2 for Figure 1 Cross-section of the middle CC; Figure 3 for Figure 1 Cross-section of the middle AA; Figure 4 for Figure 1 Cross-section of the middle BB; Figure 5 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 1 ; Figure 6 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 2 ; Figure 7 Schematic diagram of the structure of the first housing in the motor hydraulic drive system provided in the embodiment of the present application Figure 3 ; Figure 8 Schematic diagram of the operation principle of the motor and pump assembly in the motor hydraulic drive system provided in the embodiment of the present application

[0048] The present application provides a motor hydraulic drive system, including: a first shell 100, the first shell 100 has an installation cavity 170, and the first shell 100 is provided with an electrical control component 110; at least two motors 200, each motor 200 is arranged at intervals in the installation cavity 170, and each motor 200 is electrically connected to the electrical control component 110; at least two pump assemblies 300, and each motor 200 is correspondingly connected to each pump assembly 300.

[0049] The first housing 100 includes a mounting cavity 170 and electrical components 110. The first housing 100 provides a mounting and protective environment for the motor 200. The mounting cavity 170 provides space for the motors 200 and can accommodate at least two motors 200. The first housing 100 may be provided with flanges or reinforcing ribs around its perimeter to enhance its torsional and bending resistance.

[0050] The embodiment of the present application does not limit the material of the first housing 100. The embodiment of the present application does not limit the specific shape of the first housing 100. For example, the first housing 100 is polygonal.

[0051] The embodiment of the present application does not limit the specific structure of the first shell 100. For example, the shell includes a main body 130 and an end cover 140, and the two are detachably connected by bolts, screws or other connectors. Alternatively, the motor 200 can be fixed by flange connection or directly inserted into the installation cavity. The flange connection provides more adjustment and positioning flexibility. The embodiment of the present application does not limit the material of the first shell 100. For example, the material of the first shell 100 can be metal, alloy or high-strength plastic. The embodiment of the present application does not limit the size of the first shell 100, and it can be designed according to actual conditions.

[0052] Multiple motors 200 are arranged within the same first housing 100. The arrangement of the motors 200 within the first housing 100 can be flexible and diverse, including dual, triple, or quad motor arrangements. This application does not limit the structure of the motors 200. For example, the motors 200 can be single-phase or three-phase, with the appropriate motor type selected depending on the specific application. The output shaft of the motor 200 is coaxially connected to the pump shaft of the pump assembly 300.

[0053] In some embodiments, the system includes at least two motors 200, each motor 200 being spaced apart within the mounting cavity 170 and each motor 200 being electrically connected to the electrical control unit 110; and at least two pump assemblies 300, each motor 200 being coaxially connected to the respective pump assemblies 300. The motor 200 is detachably connected to the first housing 100. The output shaft of the motor 200 is coaxial with the pump shaft of the pump assembly 300. A barrier 120 is provided within the first housing 100, and the barrier 120 is disposed within the mounting cavity 170 to separate and form at least two motor cavities, with each motor 200 being connected to a motor cavity in a one-to-one correspondence. The first housing 100 includes a body 130 and an end cover 140, the body 130 having a mounting cavity 170 therein, and the end cover 140 being disposed on the body 130 to seal the mounting cavity 170. The end cover 140 is detachably connected to the body 130.

[0054] The electrical control unit 110 is connected to each motor 200 via a cable, a hub or other electrical connection methods, and each motor 200 shares one electrical control unit 110 .

[0055] The motor hydraulic drive system in the embodiment of the present application is provided with at least two motors 200 disposed in the mounting cavity 170 of the first housing 100, with a compact structure and reduced space occupation. The first housing 100 provides protection and support for the motors 200, and each motor 200 is coaxially connected to the pump assembly 300 to achieve precise control of the pump assembly 300 to adapt to different power and performance requirements. In addition, the two adjacent pump assemblies 300 do not interfere with each other, thereby improving the efficiency of the operation of the pump assembly 300. Therefore, the motor hydraulic drive system in the embodiment of the present application accurately controls each pump assembly 300 through each motor 200 to ensure output torque, and the overall structure is simple and compact, reducing space occupation.

[0056] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, a barrier member 120 is provided in the first shell 100, and the barrier member 120 is provided in the installation cavity 170 to separate and form at least two motor cavities 171, and the motor cavity 171 is used to place the motor 200.

[0057] The barrier 120 is used to separate the mounting cavity 170 into independent motor cavities 171, preventing interference between different motors 200. The barrier 120 can be plate-shaped or arc-shaped, and this embodiment of the present application is not limited thereto. In some embodiments, the barrier 120 is further provided with a barrier portion to form multiple separate cavities, each of which houses and protects the electrical control unit 110.

[0058] It should be noted that the barrier member 120 can be integrally formed with the first shell 100 , and of course the barrier member 120 can also be detachably connected to the first shell 100 .

[0059] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the barrier member 120 includes a plug-in portion 121 and at least two guide portions 150, and each guide portion 150 is arranged at intervals on the inner wall of the first shell 100, and the plug-in portion 121 is slidably connected to the guide portion 150, and the plug-in portion 121 slides along the extension direction of the guide portion 150.

[0060] The barrier 120 is detachably connected to the mounting cavity 170. In some embodiments, the first housing 100 is provided with an output hole that communicates with the motor cavity 171. The output shaft of the motor 200 passes through the output hole and connects to the pump assembly 300. The inner wall of the motor cavity 171 has an inclined surface to facilitate installation and removal of the motor 200. The angle of the inclined surface is not limited in this embodiment of the present application.

[0061] Specifically, the diameter of the barrier 120 decreases from the end facing the output hole to the end facing away from the output hole, so that the diameter of the motor cavity 171 facing the output hole is smaller than the diameter of the end facing away from the output hole. This provides a good guide, thereby facilitating the installation and removal of the motor 200. For example, when installing the motor 200, the operator can slide the motor into the motor cavity 171 along the inclined surface, and when removing the motor, the motor can be easily removed along the inclined surface.

[0062] The barrier member 120 is detachably connected to the installation cavity 170 , which facilitates maintenance or replacement of the barrier member 120 when necessary, so as to divide the space inside the installation cavity 170 .

[0063] The guide portion 150 may be a slide groove, and a slide groove is provided in the first shell 100, and the slide groove is provided along the disassembly and assembly direction of the motor 200. The two ends of the barrier 120 are slidably connected to the slide groove, and the barrier 120 moves along the extension direction of the slide groove. For example, the end of the barrier 120 has a convex shape, the slide groove is a T-shaped groove, and the convex shape is connected to the T-shaped groove. The barrier 120 is slidably connected to the slide groove, and the barrier 120 slides along the extension direction of the barrier 120. The embodiment of the present application does not limit the number of slide grooves, and the slide grooves are provided on the inner wall of the installation cavity 170 at intervals around the center of the installation cavity 170. By cooperating with a plurality of slide grooves and the barrier 120, the space in the first shell 100 can be divided as needed.

[0064] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the plug-in portion 121 has at least two connecting portions 123 , and the connecting portions 123 are connected to the inner side wall of the first shell 100 to separate and form at least two motor cavities 171 .

[0065] When the barrier member 120 is a baffle, the slide grooves are relatively arranged on the inner wall of the installation cavity 170 , and both ends of the baffle are connected to the slide grooves.

[0066] When the partition member 120 is an arc-shaped baffle, the arc-shaped baffle has three ends, and three slide grooves are arranged on the inner wall of the installation cavity 170 at intervals around the center of the installation cavity 170. The three ends of the arc-shaped baffle are connected to the three slide grooves one by one to divide the installation cavity 170 into three motor cavities 171.

[0067] There are multiple barrier members 120 , which are spaced apart in the mounting cavity 170 to form multiple motor cavities 171 .

[0068] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, a connecting hole 160 is provided on the first shell 100, the connecting hole 160 is connected to the installation cavity 170, and the electrical connector of the motor 200 is connected to the electrical control unit 110 through the connecting hole 160.

[0069] The first housing 100 is provided with a connection hole 160. Specifically, the main body 130 of the first housing 100 is provided with a connection hole 160. The present application does not limit the number of connection holes 160. For example, the first housing 100 may have two connection holes 160. The connection hole 160 communicates with the mounting cavity 170. The electrical connector of the motor 200 is connected to the electrical control unit 110 via the connection hole 160. For example, the cable of the motor 200 is electrically connected to the electrical control unit 110 via the connection hole 160.

[0070] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the first shell 100 includes a main body 130 and an end cover 140 , the main body 130 has an installation cavity 170 , and the end cover 140 is covered on the main body 130 to close the installation cavity 170 .

[0071] The first housing 100 includes a body 130 and an end cap 140. The end cap 140 is provided with a support groove on the side facing the body 130, which is used to support the motor 200. The body 130 has a mounting cavity 170 therein. The end cap 140 is provided on the body 130 to seal the mounting cavity 170 and prevent dust, moisture, and other foreign matter from entering.

[0072] In one possible implementation, in the motor hydraulic drive system in the embodiment of the present application, the first housing 100 further includes a first connecting member and a second connecting member, the first connecting member is provided on both the main body 130 and the end cover 140, and the second connecting member is detachably connected to the first connecting member.

[0073] The end cover 140 is detachably connected to the body 130 , for example, the end cover 140 is connected to the body 130 by bolts, or the end cover 140 is connected to the body 130 by a clamp, or the end cover 140 is connected to the body 130 by a hinge, so as to open or close the installation cavity 170 to disassemble and assemble the motor 200 .

[0074] In a possible implementation, in the motor hydraulic drive system in the embodiment of the present application, at least a portion of the inner wall of the mounting cavity 170 abuts against the outer wall of the motor 200 .

[0075] The barrier 120 includes a plug-in portion 121 and at least two second partitions 122. The two second partitions 122 are arranged opposite each other and connected by the plug-in portion 121. The plug-in portion 121 and the second partitions 122 enclose at least two motor cavities 171. At least part of the inner wall of the mounting cavity 170 abuts against the outer wall of the motor 200 to prevent the motor 200 from rotating during operation.

[0076] In one possible implementation, the motor hydraulic drive system in the embodiment of the present application has at least two second shells 500, and the second shells 500 have a cavity therein, which is used to place the motor. Each second shell 500 is arranged on two opposite sides of the first shell 100, and the area of ​​the cavity is smaller than the area of ​​the motor cavity 171. Each motor cavity 171 in the first shell 100 is symmetrically arranged along the center of the first shell 100.

[0077] For example, the first shell 100 has two motor cavities 171 symmetrically arranged along the barrier 120 , or the first shell 100 has three motor cavities 171 symmetrically arranged along the center of the first shell 100 .

[0078] In one possible implementation, the motor hydraulic drive system in the embodiment of the present application further includes a reduction assembly 400 , which is used to be detachably connected to the motor 200 , and the reduction assembly 400 is located between the motor 200 and the pump assembly 300 .

[0079] The reduction assembly 400 in the embodiment of the present application is used to be detachably connected to the motor 200. For example, the reduction assembly 400 is connected to a motor 200 to adjust the output power, and the reduction assembly 400 is located between the motor 200 and the pump assembly 300. For example, when there are three motors 200, the power of one reduction assembly 400 and the motor 200, and the power of the three motors 200 can be the same or different. The three motors 200 are connected to three pump assemblies 300 respectively, and the motors 200 and the pump assemblies 300 are connected one by one. For example, the pump assemblies 300 with displacements of 100, 90 and 16 are driven by the three motors 200 respectively. The pump assembly 300 can be a hydraulic pump.

[0080] The motor 200 further includes a reduction assembly 400, which is detachably connected to the motor 200 and is located between the motor 200 and the pump assembly 300. The specific structure of the reduction assembly 400 is not limited in this embodiment of the application. For example, the reduction assembly 400 is a planetary reducer.

[0081] The reduction assembly 400 in the embodiment of the present application can optimize the output power of the motor 200 to make it more adaptable to the specific requirements of the pump assembly 300, such as the requirements of large load and high torque.

[0082] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0083] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A motor hydraulic drive system, characterized in that: include: A first housing (100), wherein the first housing (100) has a mounting cavity (170) therein, and an electrical control component (110) is provided on the first housing (100); At least two motors (200), each of the motors (200) is arranged at intervals in the installation cavity (170), and each of the motors (200) is electrically connected to the electrical control unit (110). There are at least two pump assemblies (300), and each motor (200) is correspondingly connected to each pump assembly (300).

2. The motor hydraulic drive system according to claim 1, characterized in that: A barrier member (120) is provided in the first shell (100), and the barrier member (120) is provided in the installation cavity (170) to separate and form at least two motor cavities (171), and the motor cavities (171) are used to correspondingly place the motor (200).

3. The motor hydraulic drive system according to claim 2, characterized in that: The barrier member (120) comprises a plug-in portion (121) and at least two guide portions (150), wherein the guide portions (150) are arranged at intervals on the inner side wall of the first shell (100), the plug-in portion (121) is slidably connected to the guide portions (150), and the plug-in portion (121) slides along the extension direction of the guide portions (150).

4. The motor hydraulic drive system according to claim 3, characterized in that: The plug-in portion (121) has at least two connecting portions (123), and the connecting portions (123) are connected to the inner side wall of the first shell (100) to separate and form at least two motor cavities (171).

5. The motor hydraulic drive system according to any one of claims 1 to 4, characterized in that: A connecting hole (160) is provided on the first housing (100), the connecting hole (160) is communicated with the mounting cavity (170), and the electrical connector of the motor (200) is connected to the electrical control unit (110) via the connecting hole (160).

6. The motor hydraulic drive system according to any one of claims 1 to 4, characterized in that: The first shell (100) comprises a body (130) and an end cover (140), wherein the body (130) has the installation cavity (170), and the end cover (140) is disposed on the body (130) to close the installation cavity (170).

7. The motor hydraulic drive system according to claim 6, characterized in that: It also includes a second connecting member (600), the body (130) and the end cover (140) are both provided with a first connecting member, and the second connecting member (600) is detachably connected to the first connecting member.

8. The motor hydraulic drive system according to any one of claims 1 to 4, characterized in that: At least a portion of the inner wall of the installation cavity (170) abuts against the outer wall of the motor (200).

9. The motor hydraulic drive system according to any one of claims 2 to 4, characterized in that: The invention also includes at least two second shells (500), each of which has a cavity therein, and the cavity is used to place a motor. Each of the second shells (500) is arranged on two opposite sides of the first shell (100), and the area of ​​the cavity is smaller than the area of ​​the motor cavity (171). Each of the motor cavities (171) in the first shell (100) is symmetrically arranged along the center of the first shell (100).

10. The motor hydraulic drive system according to any one of claims 1 to 4, characterized in that: The invention also includes a reduction assembly (400), wherein the reduction assembly (400) is used for being detachably connected to the motor (200), and the reduction assembly (400) is located between the motor (200) and the pump assembly (300).

Images