Integrated motor pump assembly and assembling method thereof

Abstract

The invention discloses an integrated motor pump assembly and an assembling method thereof.The integrated motor pump assembly comprises a motor controller, an electric control shell, a first motor shell and a second motor shell, a first motor is installed in the first motor shell, and a second motor is installed in the second motor shell; a motor controller mounting cavity is formed in the electric control shell, and two mounting surfaces which are independent from each other and are arranged side by side are arranged at the bottom of the electric control shell and are respectively a first mounting surface and a second mounting surface; a third mounting surface is arranged on the first motor shell, and the first motor shell is hermetically assembled on the first mounting surface on one side of the bottom of the electric control shell through the third mounting surface; a fourth mounting surface is arranged on the second motor shell, and the second motor shell is hermetically assembled on a second mounting surface on the other side of the bottom of the electric control shell through the fourth mounting surface; the motor controller is installed in the motor controller installation cavity and electrically connected with the first motor and the second motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor pumps, and in particular to an integrated motor pump assembly and an assembly method thereof. Background Art

[0002] The motor pump is mainly used in the active suspension system of automobiles, and has the characteristics of high integration, small space size, simple structure, excellent sealing performance, easy disassembly and assembly, and can be disassembled and assembled multiple times. The shell of the MPU usually includes two motor shells and a controller shell arranged on the top of the two motor shells, wherein the controller shell and the two motor shells are respectively bonded by sealants and connected by bolts. The two motor shells are bonded by sealants. That is, the sealing between the three shells of the MPU is mainly achieved by sealants.

[0003] There are also controller housings and two motor housings that are fixed by multiple sets of bolts and sealed by gaskets, but the mold is complex and the production cost is high. In addition, the assembly requires multiple sets of bolts to fix, and there is still a risk of seal failure, especially in the triangular area where the horizontal and vertical intersections are prone to gaps, which may cause seal failure.

[0004] In addition, whether the controller housing and the two motor housings are bonded by sealant or fixed by multiple sets of bolts and sealed by sealing gaskets, they are all space structure seals with poor manufacturability. Summary of the invention

[0005] In response to the above technical problems, the present invention proposes an integrated motor pump assembly, which optimizes the complex spatial sealing structure design into a planar sealing design, solves the problem of difficult sealing between the motor pump unit and the controller housing, improves the sealing effect, and has good assemblability, thereby improving product quality and reducing manufacturing costs.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: An integrated motor pump assembly comprises a motor controller, an electric control housing, a first motor housing and a second motor housing, wherein a first motor is installed in the first motor housing and a second motor is installed in the second motor housing; The electric control housing is provided with a motor controller installation cavity, and the bottom of the electric control housing is provided with two installation surfaces which are independent of each other and arranged side by side, namely a first installation surface and a second installation surface; The first motor housing is provided with a third mounting surface, and the first motor housing is sealed and assembled on the first mounting surface on one side of the bottom of the electric 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 on the second mounting surface on the other side of the bottom of the electric control housing through the fourth mounting surface; The motor controller is installed in the motor controller installation cavity and is electrically connected to the first motor and the second motor.

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

[0008] In an optional embodiment, the integrated motor pump assembly further includes a sealing ring, which are a first sealing ring and a second sealing ring, wherein 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. The fourth mounting surface of the second motor housing is provided with a second sealing groove. The second sealing ring is installed in the second sealing groove.

[0009] Beneficial effect: In this embodiment, the complex spatial seal is designed as a simple plane seal, which improves the sealing effect. In this embodiment, a very mature and reliable sealing groove in the field is preferably set on the motor housing, and the sealing is achieved by a sealing ring to ensure a reliable plane sealing connection between the motor housing and the electronic control housing.

[0010] In an 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 electric control housing at a position corresponding to the first threaded hole; the motor pump assembly further comprises a first connecting bolt, and the first connecting bolt passes through the first through hole and is threadedly connected to the first threaded hole; A second threaded hole is arranged on the fourth mounting surface of the second motor housing, and a second through hole is arranged on the electric control housing at a 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.

[0011] Beneficial effect: This embodiment preferably achieves a fastening connection between the motor housing and the electronic control housing through very mature and reliable bolts in the field, and achieves sealing through sealing members, thereby ensuring a reliable fixed connection between the motor housing and the electronic control housing.

[0012] In an optional embodiment, a fifth mounting surface is further provided on the first motor housing, and the fifth mounting surface is used for mounting and connecting the first hydraulic pump; The second motor housing is provided with a sixth mounting surface, and the sixth mounting surface 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.

[0013] Beneficial effect: The circular mounting hole can realize the coaxiality of the oil pump center and the motor center, ensure the alignment of the rotation center of the motor shaft, and flexibly rotate, avoiding wear caused by unused shafts.

[0014] In an optional embodiment, a third through hole is respectively provided on the first motor housing and the second motor housing, and bolt fasteners are passed through the third through holes to achieve coaxial fixed connection between the first motor housing and the second motor housing along the axial direction of the motor.

[0015] Beneficial effect: This embodiment preferably fastens the first motor housing and the second motor housing with bolts to improve the overall stiffness and increase the free mode vibration frequency.

[0016] In an optional embodiment, a first opening is provided on a side of the first motor housing adjacent to the second motor housing, and a seventh mounting surface is provided on the first opening; a second opening is provided on a side of the second motor housing adjacent to the first motor housing, and an eighth mounting surface is provided on the second opening, and the seventh mounting surface of the first motor housing is sealingly assembled and connected to the eighth mounting surface on the second motor housing.

[0017] Beneficial effects: An opening is added to the rear of the motor for electrical connection between the three-phase wires of the motor and the controller, as well as for assembly of the speed sensor. The assemblability design is optimized to facilitate assembly automation. Only one seal is used between the two motor openings, reducing the sealing cost.

[0018] In an optional embodiment, a heat dissipation structure is provided on the outside of the electric control housing.

[0019] Beneficial effects: The heat dissipation structure can be used for heat dissipation of power components of the controller, reducing the risk of product overheating, increasing the life of the controller, and increasing the continuous working time of the controller.

[0020] In an optional embodiment, the electric control housing includes a first shell and a second shell, the first shell is sealed and assembled with the motor housing, and the second shell is sealed and assembled with the first shell.

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

[0022] The present invention further discloses an assembly method based on the integrated motor pump assembly, comprising the following steps: 1) Assemble the first hydraulic pump to the first motor to form a first motor pump assembly; assemble the second hydraulic pump to the second motor to form a second motor pump assembly; 2) Install the sealing ring in the sealing groove of the seventh mounting surface on the first motor housing, and assemble the eighth mounting surface on the second motor housing to the seventh mounting surface on the first motor housing; press the two motors by the tooling to make the mounting surfaces of the two motors fit together; 3) The first motor housing and the second motor housing are coaxially fixedly connected along the motor axis by passing a bolt fastener through the third through hole; 4) Install the first sealing ring on the third mounting surface of the first motor, and install 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 electric 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 electric control housing with the fourth mounting surface on the second motor housing, and fix the electric control housing to the first motor housing and the second motor housing respectively with bolts; 5) Install the motor controller in the motor controller installation cavity and tighten it with bolts to complete the assembly. Beneficial Effects

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

[0024] Beneficial effect: By setting the electric control housing as a split structure, the controller component PCB board can be installed in the second shell of the electric control housing, which makes it easier for the power components in the PCB board to be close to the top of the electric control housing, which is beneficial to the heat dissipation structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the integrated motor pump assembly of the present invention; Among them, 1 is the first shell of the electric 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 shell of the electric control housing; 7 is the fixing screw of the second shell of the electric control housing; 8-1 is the first sealing ring; 8-2 is the second sealing ring; 9 is the hexagon socket bolt; 10 is the controller PCB board; 11 is the fourth sealing ring.

[0026] Figure 2 for Figure 1 Exploded diagram of Figure 3 for Figure 1 Schematic diagram of the structure of the electronic control housing; Among them, 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 for Figure 1 The structural diagram of the motor; Among them, 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 outlet hole; 2-1-5 is the second 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 It is a schematic diagram of the structure of the first sealing ring and the second sealing ring; Figure 6 It is a structural explosion diagram of Embodiment 2 of the integrated motor pump assembly of the present invention; Among them, 12 is the third sealing ring; Figure 7 An exploded view of an improved structure of the integrated motor pump assembly embodiment 2 of the present invention; Figure 8 It is an exploded view of another improved structure of embodiment 2 of the integrated motor pump assembly of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and the accompanying drawings so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Example 1

[0028] like Figures 1 to 5 As shown, an integrated motor pump assembly includes a motor controller 1, an electric control housing, a first motor housing 2-1 and a second motor housing 2-2, wherein 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 electric control housing is provided with a motor controller installation cavity, and the bottom of the electric control housing is provided with two installation surfaces which are independent of each other and arranged side by side, namely a first installation surface and a second installation surface; The first motor housing 2-1 is provided with a third mounting surface, and the first motor housing 2-1 is sealed and assembled on the first mounting surface on one side of the bottom of the electric control housing through the third mounting surface; The second motor housing 2-2 is provided with a fourth mounting surface, and the second motor housing 2-2 is sealed and assembled on the second mounting surface on the other side of the bottom of the electric control housing through the fourth mounting surface; The motor controller 1 is installed in the motor controller installation cavity and is electrically connected to the first motor and the second motor.

[0029] The bottom of the motor controller installation cavity of the present invention is provided with two motor installation ports which are connected to the motor controller installation cavity and are independently arranged side by side, namely the first motor installation port and the second motor installation port, which 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 Example 1 of the present invention, the integrated motor pump assembly further includes a sealing ring, which are a first sealing ring 8-1 and a second sealing ring 8-2, wherein the first sealing ring is installed between the first mounting surface 1-1 and the third mounting surface 2-1-1, and 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, sealant sealing can be used instead of sealing ring sealing to obtain better sealing effect.

[0032] The present invention designs a complex spatial seal as a simple plane seal, thereby improving the sealing effect. In this embodiment, a very mature and reliable sealing groove is preferably set on the motor housing, and sealing is achieved through a sealing ring to ensure a reliable plane sealing connection between the motor housing and the electronic control housing.

[0033] As a further preferred embodiment of the technical solution of Example 1 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 electric control housing at a 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 arranged on the fourth mounting surface of the second motor housing, and a second through hole is arranged on the electric control housing at a 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.

[0034] Preferably, the motor housing and the electronic control housing are fastened together by bolts which are very mature and reliable in the art, and sealed by sealing members to ensure reliable fixed connection between the motor housing and the electronic control housing.

[0035] As a further preferred embodiment of the technical solution of embodiment 1 of the present invention, a fifth mounting surface 2-1-6 is further provided on the first motor housing, and the fifth mounting surface is used for mounting and connecting the first hydraulic pump; The second motor housing is provided with a sixth mounting surface, and the sixth mounting surface 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 effect: The circular mounting hole can realize the coaxiality of the oil pump center and the motor center, ensure the alignment of the rotation center of the motor shaft, and flexibly rotate, avoiding wear caused by unused shafts.

[0037] As a further preferred embodiment of the technical solution of Example 1 of the present invention, a third through hole 2-1-9 is respectively provided on the first motor housing and the second motor housing, and bolt fasteners are passed through the third through holes to achieve coaxial fixed connection between the first motor housing and the second motor housing along the motor axis.

[0038] Preferably, the first motor housing and the second motor housing are fastened together by bolts to improve the overall stiffness and increase the free mode vibration frequency. Example 2

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

[0040] Beneficial effects: An opening is added at the rear of the motor for electrical connection between the three-phase wires of the motor and the controller, as well as for assembly of the speed sensor, thus optimizing the assemblability design and facilitating assembly automation.

[0041] like Figure 7 As shown, as a further optimization of the technical solution of Example 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 motors and improve the sealing effect.

[0042] like Figure 8As described above, as a further optimization of the technical solution of Example 2, the first opening of the first motor and the second opening of the second motor are sealed by a detachably connected cover plate, thereby reducing the processing cost of the shell. Example 3

[0043] The difference between this embodiment and embodiment 1 and embodiment 2 is that a heat dissipation structure is provided on the outside of the electric control housing. It is understandable that the heat dissipation structure can be used to dissipate heat from the power components of the controller, reduce the risk of product overheating, increase the life of the controller, and increase the continuous working time of the controller.

[0044] As a further preferred embodiment of the technical solution of Example 3, the electric control housing includes a first shell of the electric control housing and a second shell of the electric control housing, the first shell of the electric control housing is sealed and assembled with the motor housing, and the second shell of the electric control housing is sealed and assembled with the first shell of the electric control housing.

[0045] This embodiment configures the electric control housing as a split structure, so that the controller assembly PCB board can be installed in the second shell of the electric control housing, which makes it easier for the power components in the PCB board to be close to the top of the electric control housing, which is beneficial to the design of the heat dissipation structure.

[0046] The present invention further discloses an assembly method based on the integrated motor pump assembly, comprising the following steps: 1) Assemble the first hydraulic pump to the first motor to form a first motor pump assembly; assemble the second hydraulic pump to the second motor to form a second motor pump assembly; 2) Install the sealing ring in the sealing groove of the seventh mounting surface on the first motor housing, and assemble the eighth mounting surface on the second motor housing to the seventh mounting surface on the first motor housing; press the two motors by the tooling to make the mounting surfaces of the two motors fit together; 3) The first motor housing and the second motor housing are coaxially fixedly connected along the motor axis by passing a bolt fastener through the third through hole; 4) Install the first sealing ring on the third mounting surface of the first motor, and install 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 electric 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 electric control housing with the fourth mounting surface on the second motor housing, and fix the electric control housing to the first motor housing and the second motor housing respectively with bolts; 5) Install the motor controller in the motor controller installation cavity and tighten it with bolts to complete the assembly.

[0047] In step 4), the first shell of the electric control housing is a flat structure, and the second shell of the electric control housing is provided with a motor controller installation cavity. First, the motor controller is fixed in the motor controller installation cavity of the second shell of the electric control housing, and then the first shell of the electric control housing and the second shell of the electric 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 electric control housing, a first motor housing and a second motor housing, wherein the first motor housing is installed with a first motor, and the second motor housing is installed with a second motor; The electric control housing is provided with a motor controller installation cavity, and the bottom of the electric control housing is provided with two installation surfaces which are independent of each other and arranged side by side, namely a first installation surface and a second installation surface; The first motor housing is provided with a third mounting surface, and the first motor housing is sealed and assembled on the first mounting surface on one side of the bottom of the electric 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 on the second mounting surface on the other side of the bottom of the electric control housing through the fourth mounting surface; The motor controller is installed in the motor controller installation 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 further includes a sealing ring, which are a first sealing ring and a second sealing ring, wherein 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. The fourth mounting surface of the second motor housing is provided with a second sealing groove. 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 electric control housing at a position corresponding to the first threaded hole; the motor pump assembly further comprises 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 arranged on the fourth mounting surface of the second motor housing, and a second through hole is arranged on the electric control housing at a 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, and the fifth mounting surface is used for mounting and connecting the first hydraulic pump; The second motor housing is provided with a sixth mounting surface, and the sixth mounting surface 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.

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, and bolt fasteners are passed through the third through holes to achieve coaxial fixed connection between the first motor housing and the second motor housing along the axial direction of the motor.

6. The integrated motor pump assembly according to claim 5, characterized in that A first opening is provided on a side of the first motor housing adjacent to the second motor housing, and a seventh mounting surface is provided on the first opening; a second opening is provided on a side of the second motor housing adjacent to the first motor housing, and an eighth mounting surface is provided on the second opening, and the seventh mounting surface of the first motor housing is sealingly assembled and connected to the eighth mounting surface on the second motor housing.

7. The integrated motor pump assembly according to claim 6, characterized in that A heat dissipation structure is arranged outside the electric control housing.

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

9. An assembly method of the integrated motor pump assembly according to claim 8, characterized in that: The following steps are involved: 1) Assembling the first hydraulic pump to the first motor housing to form a first motor pump assembly; Assembling the second hydraulic pump to the second motor housing to form a second motor pump assembly; 2) installing the third 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 to the seventh mounting surface on the first motor housing; The two motor housings are pressed tightly by the tooling to make 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 passing a bolt fastener through the third through hole; 4) Install the first sealing ring on the third mounting surface of the first motor, and install 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 electric 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 electric control housing with the fourth mounting surface on the second motor housing, and fix the electric control housing to the first motor housing and the second motor housing respectively with bolts; 5) Install the motor controller in the motor controller installation cavity and tighten it with bolts to complete the assembly.

10. The method for assembling an integrated motor pump assembly according to claim 9, characterized in that: In step 4), the first shell of the electric control housing is a flat structure, and the second shell of the electric control housing is provided with a motor controller installation cavity. First, the motor controller is fixed to the top of the motor controller installation cavity of the second shell of the electric control housing, and then the first shell of the electric control housing and the second shell of the electric control housing are fixed together to the first motor housing and the second motor housing with bolts.

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