Integrated electric motor pump assembly and assembly method therefor

Abstract

Disclosed are an integrated electric motor pump assembly and an assembly method therefor. The integrated electric motor pump assembly comprises an electric motor controller, an electronic control housing, a first electric motor housing and a second electric motor housing, wherein a first electric motor is mounted inside the first electric motor housing, and a second electric motor is mounted inside the second electric motor housing; an electric motor controller mounting cavity is disposed in the electronic control housing, and two mounting surfaces independent of each other and arranged side by side, namely a first mounting surface and a second mounting surface, are provided at the bottom of the electronic control housing; the first electric motor housing is provided with a third mounting surface, and the first electric motor housing is sealingly assembled on the first mounting surface on one side of the bottom of the electronic control housing by means of the third mounting surface; the second electric motor housing is provided with a fourth mounting surface, and the second electric motor housing is sealingly assembled on the second mounting surface on the other side of the bottom of the electronic control housing by means of the fourth mounting surface; and the electric motor controller is mounted inside the electric motor controller mounting cavity and is electrically connected to the first electric motor and the second electric motor.

Description

An integrated motor pump assembly and its assembly method Technical Field

[0001] This invention relates to the field of electric motor pump technology, and more specifically, to an integrated electric motor pump assembly and its assembly method. Background Technology

[0002] Electric motor pumps (MPPs) are primarily used in automotive active suspension systems. They feature high integration, small size, simple structure, excellent sealing performance, easy assembly and disassembly, and the ability to be disassembled and reassembled multiple times. The MPU housing typically consists of two motor housings and a controller housing mounted on top of the two motor housings. The controller housing is bonded to each of the two motor housings with sealant and then connected by bolts. The two motor housings are also bonded together with sealant. In other words, the sealing between the three housings of the MPU is primarily achieved through sealant.

[0003] Alternatively, the controller housing and the two motor housings can be secured separately with multiple sets of bolts and sealed with gaskets. However, this method involves complex molds and high production costs. Furthermore, the need for multiple bolts during assembly still carries the risk of seal failure, especially in the triangular area where horizontal and vertical lines intersect, where gaps can easily form and lead to seal failure.

[0004] In addition, whether the controller housing is bonded to the two motor housings with sealant or fixed with multiple sets of bolts and sealed with gaskets, it is a spatial structure seal, which has poor manufacturability. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes an integrated motor-pump assembly. This assembly optimizes the complex spatial sealing structure design into a planar sealing design, solving the problem of difficult sealing between the motor-pump unit and the controller housing, improving the sealing effect, and also offering good assemblability, thereby improving product quality and reducing manufacturing costs.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: An integrated motor-pump assembly includes a motor controller, an electrical control housing, a first motor housing, and a second motor housing. A first motor is installed in the first motor housing, and a second motor is installed in the second motor housing. The electrical control housing has a motor controller mounting cavity, and its bottom has two independent and side-by-side mounting surfaces, namely a first mounting surface and a second mounting surface. The first motor housing has a third mounting surface, and the first motor housing is sealed and fitted onto the first mounting surface on one side of the bottom of the electrical control housing via the third mounting surface. The second motor housing has a fourth mounting surface, and the second motor housing is sealed and fitted onto the second mounting surface on the other side of the bottom of the electrical control housing via the fourth mounting surface. The motor controller is installed within the motor controller mounting cavity and is electrically connected to the first and second motors.

[0007] Beneficial effects: The bottom of the motor controller mounting cavity of the present invention is provided with two motor mounting ports that are connected to the motor controller mounting cavity and arranged side by side independently, namely the first motor mounting port and the second motor mounting port, which improves the sealing effect, has good assemblability, improves product quality, and reduces manufacturing costs.

[0008] In one optional embodiment, the integrated motor pump assembly further includes sealing rings, namely a first sealing ring and a second sealing ring. The first sealing ring is installed between the first mounting surface and the third mounting surface, and a first sealing groove is provided on the third mounting surface of the first motor housing, in which the first sealing ring is installed. The second sealing ring is installed between the second mounting surface and the fourth mounting surface, and a second sealing groove is provided on the fourth mounting surface of the second motor housing, in which the second sealing ring is installed.

[0009] Beneficial effects: In this embodiment, the complex spatial seal design is transformed into a simple planar seal, which improves the sealing effect. In addition, this embodiment preferably provides a sealing groove on the motor housing that is very mature and reliable in the art, and achieves sealing through a sealing ring, ensuring a reliable planar sealed connection between the motor housing and the electrical control housing.

[0010] In one optional embodiment, a first threaded hole is provided on the third mounting surface of the first motor housing, and a first through hole is provided on the electrical control housing at the position corresponding to the first threaded hole; the motor pump assembly further includes a first connecting bolt, which passes through the first through hole and is threadedly connected to the first threaded hole; a second threaded hole is provided on the fourth mounting surface of the second motor housing, and a second through hole is provided on the electrical control housing at the position corresponding to the second threaded hole; the motor pump assembly further includes a second connecting bolt, which passes through the second through hole and is threadedly connected to the second threaded hole.

[0011] Beneficial effects: In this embodiment, the motor housing and the electronic control housing are preferably fastened together by bolts, which are very mature and reliable in the art, and sealed by a sealant, so as to ensure a reliable fixed connection between the motor housing and the electronic control housing.

[0012] In one optional embodiment, the first motor housing is further provided with a fifth mounting surface for mounting and connecting the first hydraulic pump; the second motor housing is provided with a sixth mounting surface for mounting and connecting the second hydraulic pump; the fifth and sixth mounting surfaces are respectively provided with circular mounting holes for coaxial positioning of the motor and the hydraulic pump.

[0013] Beneficial effects: The circular mounting hole here allows the oil pump center and the motor center to be coaxial, ensuring that the rotation center of the motor shaft is aligned and can rotate flexibly, avoiding wear caused by not using the shaft.

[0014] In one optional embodiment, the first motor housing and the second motor housing are respectively provided with a third through hole, and the first motor housing and the second motor housing are coaxially fixedly connected along the motor axis by bolts and fasteners passing through the third through holes.

[0015] Beneficial effects: In this embodiment, the first motor housing and the second motor housing are preferably fastened together with bolts to improve the overall rigidity and increase the free modal vibration frequency.

[0016] In one optional embodiment, the first motor housing has a first opening on one side adjacent to the second motor housing, and the first opening has a seventh mounting surface; the second motor housing has a second opening on one side adjacent to the first motor housing, and the second opening has an eighth mounting surface, and the seventh mounting surface of the first motor housing and the eighth mounting surface of the second motor housing are sealed and assembled together.

[0017] Beneficial effects: An opening is added at the tail of the motor for the electrical connection between the motor's three-phase wires and the controller, as well as for the assembly of the speed sensor. This optimizes the assemblability design, facilitates automated assembly, and reduces sealing costs by using only one seal between the two motor openings.

[0018] In one alternative embodiment, the exterior of the electronic control housing is provided with a heat dissipation structure.

[0019] Beneficial effects: This heat dissipation structure can be used to dissipate heat from the power components of the controller, reduce the risk of overheating, extend the life of the controller, and increase the continuous working time of the controller.

[0020] In one optional embodiment, the electronic control housing includes a first electronic control housing and a second electronic control housing, wherein the first electronic control housing is sealed and assembled with the motor housing, and the second electronic control housing is sealed and assembled with the first electronic control housing.

[0021] Beneficial effects: By setting the electrical control housing as a split structure, the controller component PCB board can be installed in the second shell of the electrical control housing, which makes it easier for the power components on the PCB board to be close to the top of the electrical control housing, which is beneficial to the heat dissipation structure design.

[0022] This invention further discloses an assembly method based on the integrated motor-pump assembly, comprising the following steps: 1) Assembling a first hydraulic pump on a first motor to form a first motor-pump assembly; assembling a second hydraulic pump on a second motor to form a second motor-pump assembly; 2) Installing a sealing ring in the sealing groove of the seventh mounting surface on the first motor housing, and assembling the eighth mounting surface on the second motor housing on the seventh mounting surface on the first motor housing; pressing the two motors together with tooling to make the mounting surfaces of the two motors fit together; 3) Using bolts and fasteners passing through the third through hole to achieve a coaxial connection between the first motor housing and the second motor housing along the motor axis; 4) Installing the first sealing ring on the third mounting surface of the first motor, and the second sealing ring on the fourth mounting surface of the second motor; aligning the first mounting surface on one side of the bottom of the electrical control housing with the third mounting surface on the first motor housing, aligning the second mounting surface on the other side of the bottom of the electrical control housing with the fourth mounting surface on the second motor housing, and fixing the electrical control housing to the first motor housing and the second motor housing respectively with bolts; 5) Installing the motor controller in the motor controller mounting cavity and tightening with bolts to complete the assembly. Beneficial effects

[0023] In step 4), the first housing of the electrical control housing has a flat plate structure, and the second housing of the electrical control housing has a motor controller mounting cavity. First, the motor controller is fixed in the motor controller mounting cavity of the second housing of the electrical control housing, and then the first housing and the second housing of the electrical control housing are fixed together to the first motor housing and the second motor housing with bolts.

[0024] Beneficial effects: By setting the electrical control housing as a split structure, the controller component PCB board can be installed in the second shell of the electrical control housing, which makes it easier for the power components on the PCB board to be close to the top of the electrical control housing, which is beneficial to the heat dissipation structure design. Attached Figure Description

[0025] Figure 1 is a structural schematic diagram of Embodiment 1 of the integrated motor pump assembly of the present invention; wherein, 1 is the first housing of the electrical control housing; 2-1 is the first motor housing; 2-2 is the second motor housing; 3-1 is the first hydraulic pump; 3-2 is the second hydraulic pump; 4 is the hydraulic pump screw; 5 is the motor screw; 6 is the second housing of the electrical control housing; 7 is the fixing screw of the second housing of the electrical control housing; 8-1 is the first sealing ring; 8-2 is the second sealing ring; 9 is the internal hex bolt; 10 is the controller PCB board; 11 is the fourth sealing ring.

[0026] Figure 2 is an exploded view of Figure 1; Figure 3 is a structural schematic diagram of the electrical control housing in Figure 1; wherein, 1-1 is the first mounting surface; 1-2 is the second mounting surface; 1-3 is the first through hole; 1-4 is the third threaded hole; Figure 4 is a structural schematic diagram of the motor in Figure 1; wherein, 2-1-1 is the third mounting surface; 2-1-2 is the first sealing groove; 2-1-3 is the first threaded hole; 2-1-4 is the first cable outlet hole; 2-1-5 is the second cable outlet hole; 2-1-6 is the fifth mounting surface; 2-1-7 is the motor shaft; 2-1-8 is the fourth threaded hole; 2-1-9 is the third through hole; Figure 5 is a structural schematic diagram of the first sealing ring and the second sealing ring; Figure 6 is an exploded view of the integrated motor pump assembly embodiment 2 of the present invention; wherein, 12 is the third sealing ring; Figure 7 is an exploded view of an improved structure of the integrated motor pump assembly embodiment 2 of the present invention; Figure 8 is an exploded view of another improved structure of the integrated motor pump assembly embodiment 2 of the present invention. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings, so that those skilled in the art can better understand and implement the present invention. However, the embodiments given are not intended to limit the present invention. Embodiment 1

[0028] As shown in Figures 1 to 5, an integrated motor pump assembly includes a motor controller 1, an electrical control housing, a first motor housing 2-1, and a second motor housing 2-2. A first motor is installed in the first motor housing 2-1, and a second motor is installed in the second motor housing 2-2. The electrical control housing has a motor controller mounting cavity, and its bottom has two independent and side-by-side mounting surfaces: a first mounting surface and a second mounting surface. The first motor housing 2-1 has a third mounting surface, which is used to seal and assemble the first motor housing 2-1 onto the first mounting surface on one side of the bottom of the electrical control housing. The second motor housing 2-2 has a fourth mounting surface, which is used to seal and assemble the second motor housing 2-2 onto the second mounting surface on the other side of the bottom of the electrical control housing. The motor controller 1 is installed within the motor controller mounting cavity and is electrically connected to the first and second motors.

[0029] The bottom of the motor controller mounting cavity of the present invention is provided with two motor mounting ports that are connected to the motor controller mounting cavity and arranged independently side by side, namely the first motor mounting port and the second motor mounting port. This improves the sealing effect, has good assemblability, improves product quality, and reduces manufacturing costs.

[0030] As a further preferred embodiment of the technical solution of the present invention, the integrated motor pump assembly further includes sealing rings, namely a first sealing ring 8-1 and a second sealing ring 8-2. The first sealing ring is installed between the first mounting surface 1-1 and the third mounting surface 2-1-1. A first sealing groove 2-1-2 is provided on the third mounting surface 2-1-1 of the first motor housing, and the first sealing ring is installed in the first sealing groove. The second sealing ring is installed between the second mounting surface 1-2 and the fourth mounting surface. A second sealing groove is provided on the fourth mounting surface of the second motor housing, and the second sealing ring is installed in the second sealing groove.

[0031] Of course, a better sealing effect can be achieved by using sealant instead of a sealing ring.

[0032] This invention transforms a complex spatial sealing design into a simple planar seal, thereby improving the sealing effect. In this embodiment, a sealing groove that is very mature and reliable in the field is preferably provided on the motor housing, and a sealing ring is used to achieve the seal, ensuring a reliable planar sealed connection between the motor housing and the electrical control housing.

[0033] As a further preferred embodiment of the technical solution of the present invention, a first threaded hole 2-1-3 is provided on the third mounting surface of the first motor housing, and a first through hole 1-3 is provided on the electrical control housing at the position corresponding to the first threaded hole; the motor pump assembly further includes a first connecting bolt, which passes through the first through hole and is threadedly connected to the first threaded hole; a second threaded hole is provided on the fourth mounting surface of the second motor housing, and a second through hole is provided on the electrical control housing at the position corresponding to the second threaded hole; the motor pump assembly further includes a second connecting bolt, which passes through the second through hole and is threadedly connected to the second threaded hole.

[0034] Preferably, the motor housing and the electrical control housing are fastened together using bolts, which are very mature and reliable in the field, and sealed with seals to ensure a reliable fixed connection between the motor housing and the electrical control housing.

[0035] As a further preferred embodiment of the technical solution of the present invention, the first motor housing is further provided with a fifth mounting surface 2-1-6, which is used for mounting and connecting the first hydraulic pump; the second motor housing is provided with a sixth mounting surface, which is used for mounting and connecting the second hydraulic pump; the fifth mounting surface and the sixth mounting surface are respectively provided with circular mounting holes for coaxial positioning of the motor and the hydraulic pump.

[0036] Beneficial effects: The circular mounting hole here allows the oil pump center and the motor center to be coaxial, ensuring that the rotation center of the motor shaft is aligned and can rotate flexibly, avoiding wear caused by not using the shaft.

[0037] As a further preferred embodiment of the technical solution of the present invention, the first motor housing and the second motor housing are respectively provided with a third through hole 2-1-9, and the first motor housing and the second motor housing are fixedly connected coaxially along the motor axis by means of bolts and fasteners passing through the third through holes.

[0038] Preferably, the first motor housing and the second motor housing are bolted together to improve overall rigidity and increase the free modal vibration frequency. Example 2

[0039] As shown in Figure 6, the difference between this embodiment and Embodiment 1 is that the first motor housing has a first opening on the side adjacent to the second motor housing, and the first opening has a seventh mounting surface; the second motor housing has a second opening on the side adjacent to the first motor housing, and the second opening has an eighth mounting surface, and the seventh mounting surface of the first motor housing and the eighth mounting surface of the second motor housing are sealed and assembled together.

[0040] Beneficial effects: An opening is added to the tail of the motor for the electrical connection between the motor's three-phase wires and the controller, as well as for the assembly of the speed sensor, optimizing the assemblability design and facilitating automated assembly.

[0041] As shown in Figure 7, as a further optimization of the technical solution of Embodiment 2, the first opening of the first motor and the second opening of the second motor are respectively detachably connected with cover plates to achieve independent sealing of the motor and improve the sealing effect.

[0042] As shown in Figure 8, as a further optimization of the technical solution in Embodiment 2, a cover plate that can be detachably connected between the first opening of the first motor and the second opening of the second motor is used to achieve sealing, reducing the processing cost of the housing. Embodiment 3

[0043] The difference between this embodiment and Embodiments 1 and 2 is that the external of the electronic control housing is provided with a heat dissipation structure. It can be understood that this heat dissipation structure can be used to dissipate heat from the controller's power components, reducing the risk of overheating, extending the controller's lifespan, and increasing the controller's continuous operating time.

[0044] As a further preferred embodiment of the technical solution, the electrical control housing includes a first electrical control housing and a second electrical control housing. The first electrical control housing is sealed and assembled with the motor housing, and the second electrical control housing is sealed and assembled with the first electrical control housing.

[0045] This embodiment sets the electronic control housing as a split structure, which allows the controller component PCB board to be installed in the second housing of the electronic control housing. This makes it easier for the power components in the PCB board to be close to the top of the electronic control housing, which is beneficial for the heat dissipation structure design.

[0046] This invention further discloses an assembly method based on the integrated motor-pump assembly, comprising the following steps: 1) Assembling a first hydraulic pump on a first motor to form a first motor-pump assembly; assembling a second hydraulic pump on a second motor to form a second motor-pump assembly; 2) Installing a sealing ring in the sealing groove of the seventh mounting surface on the first motor housing, and assembling the eighth mounting surface on the second motor housing on the seventh mounting surface on the first motor housing; pressing the two motors together with tooling to make the mounting surfaces of the two motors fit together; 3) Using bolts and fasteners passing through the third through hole to achieve a coaxial connection between the first motor housing and the second motor housing along the motor axis; 4) Installing the first sealing ring on the third mounting surface of the first motor, and the second sealing ring on the fourth mounting surface of the second motor; aligning the first mounting surface on one side of the bottom of the electrical control housing with the third mounting surface on the first motor housing, aligning the second mounting surface on the other side of the bottom of the electrical control housing with the fourth mounting surface on the second motor housing, and fixing the electrical control housing to the first motor housing and the second motor housing respectively with bolts; 5) Installing the motor controller in the motor controller mounting cavity and tightening with bolts to complete the assembly.

[0047] In step 4), the first housing of the electrical control housing has a flat plate structure, and the second housing of the electrical control housing has a motor controller mounting cavity. First, the motor controller is fixed in the motor controller mounting cavity of the second housing of the electrical control housing, and then the first housing and the second housing of the electrical control housing are fixed together to the first motor housing and the second motor housing with bolts.

Claims

1. An integrated motor-pump assembly, characterized in that, It includes a motor controller, an electrical control housing, a first motor housing, and a second motor housing, wherein the first motor housing houses the first motor, and the second motor housing houses the second motor. The electrical control housing has a motor controller mounting cavity, and the bottom of the electrical control housing has two independent mounting surfaces arranged side by side, namely the first mounting surface and the second mounting surface. The first motor housing is provided with a third mounting surface, and the first motor housing is sealed and assembled to the first mounting surface on one side of the bottom of the electronic control housing through the third mounting surface; The second motor housing is provided with a fourth mounting surface, and the second motor housing is sealed and assembled to the second mounting surface on the other side of the bottom of the electrical control housing through the fourth mounting surface; The motor controller is installed inside the motor controller mounting cavity and is electrically connected to the first motor and the second motor.

2. The integrated motor pump assembly according to claim 1, characterized in that, The integrated motor pump assembly also includes sealing rings, namely a first sealing ring and a second sealing ring. The first sealing ring is installed between the first mounting surface and the third mounting surface. A first sealing groove is provided on the third mounting surface of the first motor housing, and the first sealing ring is installed in the first sealing groove. The second sealing ring is installed between the second mounting surface and the fourth mounting surface. A second sealing groove is provided on the fourth mounting surface of the second motor housing, and the second sealing ring is installed in the second sealing groove.

3. The integrated motor-pump assembly according to claim 2, characterized in that, A first threaded hole is provided on the third mounting surface of the first motor housing, and a first through hole is provided on the electrical control housing at the position corresponding to the first threaded hole; the motor pump assembly further includes a first connecting bolt, which passes through the first through hole and is threadedly connected to the first threaded hole. The second motor housing has a second threaded hole on its fourth mounting surface, and the electrical control housing has a second through hole at the position corresponding to the second threaded hole; the motor pump assembly also includes a second connecting bolt, which passes through the second through hole and is threadedly connected to the second threaded hole.

4. The integrated motor-pump assembly according to claim 3, characterized in that, The first motor housing is also provided with a fifth mounting surface, which is used for mounting and connecting the first hydraulic pump; The second motor housing is provided with a sixth mounting surface, which is used for mounting and connecting the second hydraulic pump; The fifth and sixth mounting surfaces are respectively provided with circular mounting holes for coaxial positioning of the motor and the hydraulic pump.

5. The integrated motor pump assembly according to claim 4, characterized in that, The first motor housing and the second motor housing are respectively provided with a third through hole. The first motor housing and the second motor housing are fixedly connected coaxially along the motor axis by bolts and fasteners passing through the third through holes.

6. The integrated motor-pump assembly according to claim 5, characterized in that, The first motor housing has a first opening on one side adjacent to the second motor housing, and the first opening has a seventh mounting surface; the second motor housing has a second opening on one side adjacent to the first motor housing, and the second opening has an eighth mounting surface, and the seventh mounting surface of the first motor housing and the eighth mounting surface of the second motor housing are sealed and assembled together.

7. The integrated motor-pump assembly according to claim 6, characterized in that, The exterior of the electronic control housing is equipped with a heat dissipation structure.

8. The integrated motor-pump assembly according to claim 7, characterized in that, The electrical control housing includes a first electrical control housing and a second electrical control housing. The first electrical control housing is sealed and assembled with the motor housing, and the second electrical control housing is sealed and assembled with the first electrical control housing.

9. An assembly method based on the integrated motor-pump assembly of claim 8, characterized in that, Includes the following steps: 1) The first hydraulic pump is assembled into the housing of the first motor to form the first motor pump assembly; The second hydraulic pump is assembled into the housing of the second motor to form the second motor pump assembly; 2) Install the third sealing ring into the sealing groove of the seventh mounting surface on the first motor housing, and assemble the eighth mounting surface on the second motor housing onto the seventh mounting surface on the first motor housing; The tooling is used to press the two motor housings together, so that the mounting surfaces of the two motor housings fit together. 3) The first motor housing and the second motor housing are coaxially fixedly connected along the motor axis by bolts and fasteners passing through the third through hole. 4) Install the first sealing ring on the third mounting surface of the first motor and the second sealing ring on the fourth mounting surface of the second motor; align the first mounting surface on one side of the bottom of the electrical control housing with the third mounting surface on the first motor housing, align the second mounting surface on the other side of the bottom of the electrical control housing with the fourth mounting surface on the second motor housing, and fix the electrical control housing to the first motor housing and the second motor housing respectively with bolts; 5) Install the motor controller in the motor controller mounting cavity and tighten it with bolts to complete the assembly.

10. The assembly method of the integrated motor-pump assembly according to claim 9, characterized in that, In step 4), the first housing of the electrical control housing has a flat plate structure, and the second housing of the electrical control housing is provided with a motor controller mounting cavity. First, the motor controller is fixed to the top of the motor controller mounting cavity of the second housing of the electrical control housing, and then the first housing and the second housing of the electrical control housing are fixed together to the first motor housing and the second motor housing with bolts.

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