Controller structure of motor

Abstract

The utility model discloses a controller structure of a motor, which comprises an end cover with a cavity, an opening at one end of the cavity is used for being communicated with an inner cavity of the motor, a control circuit board assembly is arranged in the cavity, a first opening communicated with the cavity is arranged on the end cover, and a cover plate is arranged in the first opening. A first glue groove connected end to end is formed between the cover plate and the first opening, a first mounting hole communicated with the cavity is formed in the cover plate, and an IO connector electrically connected with the control circuit board assembly is arranged in the first mounting hole. According to the utility model, the glue grooves which are connected end to end are respectively arranged between the first opening of the end cover and the cover plate and between the first mounting hole of the cover plate and the IO connector, and the glue grooves are filled with the sealant in a flowing state, so that a dual-sealing structure is formed. By means of the design, the sealing effect during initial installation is guaranteed, and the waterproof performance of long-term use can be kept. The sealant groove can be fully filled with the sealant in a flowing state, and a perfect matched sealing structure is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control, in particular to a controller structure of a motor. Background Art

[0002] As a key component of the motor system, the motor controller's structural design directly impacts the performance and reliability of the entire system. Motor controllers typically utilize a separate housing, encapsulating the control circuit board. To enhance waterproofing, manufacturers typically incorporate a rubber gasket seal between the I / O interface and the housing.

[0003] This method places high demands on the rubber gasket assembly process. If the gasket is not tightly fitted during initial installation, even if it achieves a certain degree of waterproofing, the gasket will easily deform and age after long-term use of the controller, losing its elasticity and causing the seal to fail, making water seepage more likely.

[0004] Therefore, there is an urgent need for a new motor controller design that can not only ensure good initial waterproof performance but also take into account the waterproof requirements after long-term use. Utility Model Content

[0005] The main purpose of this utility model is to provide a motor controller structure to solve the above technical problems.

[0006] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0007] A controller structure for a motor includes: an end cover having a cavity, one end of the cavity being open for communicating with the inner cavity of the motor, a control circuit board assembly being arranged in the cavity, a first opening being provided on the end cover for communicating with the cavity, a cover plate being provided in the first opening, a first glue groove connected end to end being formed between the cover plate and the first opening, a first mounting hole being provided on the cover plate for communicating with the cavity, an IO connector electrically connected to the control circuit board assembly being provided in the first mounting hole, a second glue groove connected end to end being formed between the IO connector and the first mounting hole, the first glue groove and the second glue groove being respectively filled with sealant that is in a flowing state when filled.

[0008] The outer wall of the cover plate and the inner wall of the first opening form the first glue groove having a continuous path.

[0009] The outer wall of the IO connector and the inner wall of the first mounting hole form the second glue groove having a continuous path.

[0010] The cover plate is further provided with a second mounting hole communicating with the cavity, and a waterproof breathable valve is provided in the second mounting hole.

[0011] The end cover is further provided with a second opening communicating with the cavity, and a power socket electrically connected to the control circuit board assembly is provided in the second opening.

[0012] Wherein, a waterproof rubber pad is provided between the power socket and the second opening.

[0013] Wherein, the end cover is a cylinder with one end open, and the first opening and the second opening pass through opposite sides of the cylinder.

[0014] Wherein, the end cover is provided with a plurality of positioning holes on the edge of the opening.

[0015] Wherein, the control circuit board assembly is respectively connected with a MOS tube and a connector male head.

[0016] Beneficial technical effects of the utility model:

[0017] This utility model creates a double seal structure by providing end-to-end adhesive grooves between the first opening of the end cap and the cover plate, and between the first mounting hole of the cover plate and the IO connector. These grooves are filled with flowing sealant. This design not only ensures a good seal during initial installation, but also maintains waterproof performance over time. The flowing sealant fully fills the grooves, forming a perfectly fitting seal structure, resolving the problem of traditional rubber gaskets that make it difficult to install a tight fit. Furthermore, the seal structure adapts to its corresponding area and is less susceptible to deformation and failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of a controller according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the use state of the controller according to the embodiment of the utility model;

[0020] Figure 3 A schematic cross-sectional view of a controller according to an embodiment of the present invention;

[0021] Figure 4 A schematic side view of a controller according to an embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional schematic diagram of the cover of the controller according to an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] In the figure: 10-end cover, 11-cavity, 20-control circuit board assembly, 21-MOS tube, 22-connector male head, 30-first opening, 40-cover, 41-first mounting hole, 42-second mounting hole, 51-first glue groove, 52-second glue groove, 60-IO connector, 70-waterproof breathable valve, 80-second opening, 90-power socket, 91-waterproof rubber pad, 100-positioning hole, 110-motor housing, 111-motor lead wire. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0026] like Figure 1-Figure 5 As shown, the motor controller structure provided in this embodiment is used to be installed at the rear end of a brushless DC motor.

[0027] The controller structure includes an end cap 10. A cavity 11 is formed within the end cap 10, with one end open to facilitate communication with the inner cavity of the motor. A control circuit board assembly 20 is mounted within the cavity 11, integrating various electronic components required to control the motor's operation, such as the drive circuit.

[0028] The end cap 10 is penetrated by a first opening 30 communicating with the cavity 11, within which a cover plate 40 is mounted. A first adhesive groove 51 is formed between the cover plate 40 and the first opening 30, connecting end to end. "End to end" refers to the fact that the adhesive groove forms a complete, continuous channel structure. This design, when filled with sealant, creates a complete, continuous seal without interruptions. This ensures that the sealant between the cover plate 40 and the first opening 30, after forming, fits perfectly within the area between them.

[0029] The cover plate 40 is provided with a first mounting hole 41 that communicates with the cavity 11. The size of the first mounting hole 41 matches the IO connector 60. The IO connector 60 is installed in the first mounting hole 41 and is electrically connected to the control circuit board assembly 20 to facilitate signal transmission between the controller and external devices.

[0030] A second adhesive groove 52 is formed between the IO connector 60 and the first mounting hole 41, connecting end to end. "Connected end to end" here also means that the adhesive groove forms a complete, continuous channel structure. This design ensures that the sealant between the IO connector 60 and the first mounting hole 41 fits perfectly between them after molding.

[0031] The two sealants mentioned above are both in a flowing state during filling, specifically in a liquid or paste (gel) state, so that they can fully fill the glue groove and form a sealing structure that can adapt to the corresponding area, effectively preventing moisture from entering the controller from there.

[0032] The above structural design not only realizes the function of the IO interface, but also ensures the waterproof performance of the installation area of the IO connector 60 through double sealing, thereby improving the overall reliability and service life of the controller.

[0033] In addition, the design of mounting the IO connector 60 on the cover plate 10 allows the IO connector 60 to be pre-assembled with the cover plate 10 into a submodule. This makes it easier to fill and inspect the sealant during the assembly process.

[0034] In this embodiment, the outer wall of the cover plate 40 and the inner wall of the first opening 30 form a first adhesive groove 51 having a continuous path. Specifically, the first opening 30 forms an annular groove with a stepped cross-section on the outer circumference of the end cap 10. The overall contour of this groove can be circular, rectangular, or other polygonal, depending on the shape of the end cap 10. Taking a rectangular groove as an example:

[0035] The channel is composed of two steps of varying depths, gradually deepening from the outside inward. The cover plate 40 is a rectangular plate structure that fits within this stepped channel. The cover plate 40 is wider than the second (inner) step, allowing it to rest on the second step, leaving a gap between it and the sidewall of the first (outer) step to form the first adhesive groove 51.

[0036] The sealant is injected into the gap and after solidification, a complete and continuous sealing structure is formed between the cover plate 40 and the end cover 10. The sealing structure can be more perfectly adapted to the area between them.

[0037] In this embodiment, the outer wall of the IO connector 60 and the inner wall of the first mounting hole 41 form a second adhesive groove 52 having a continuous path. Specifically, the shape of the second adhesive groove 52 is similar to that of the first adhesive groove 51. The first mounting hole 41 forms an annular channel with a stepped cross-section on the surface of the cover plate 40.

[0038] The IO connector 60 is placed within the channel, and the gap between the outer wall of the IO connector 60 and the inner wall of the channel forms the second adhesive groove 52. The adhesive groove is filled with a jelly sealant, which, after curing, forms a complete, continuous seal structure that fits the area between them more perfectly.

[0039] In this embodiment, the continuous path refers to a complete and continuous path.

[0040] In this embodiment, the sealant can be made of a sealant material such as liquid silicone rubber that has good temperature resistance, weather resistance and sealing properties.

[0041] In this embodiment, the IO connector 60 is welded to the control circuit board assembly 20 via copper pins. This connection cannot withstand significant pressure. Therefore, sealant is injected into the second adhesive groove 52. This not only forms a continuous seal after the sealant cures, but also provides additional support and fixation for the IO connector 60, reducing external forces directly acting on the weld points.

[0042] In one embodiment, the cover plate 40 is further provided with a second mounting hole 42 communicating with the cavity 11 , and a waterproof breathable valve 70 is provided in the second mounting hole 42 .

[0043] The waterproof breathable valve 70 allows air to circulate but prevents water from entering. After the end cap 10 is connected to the motor, its cavity 11 communicates with the motor's interior. When the motor is operating, heat is generated inside the cavity 11, creating a pressure difference between the inside and outside of the cavity 11. The waterproof breathable valve 70 compensates for this pressure difference.

[0044] By adding the waterproof breathable valve 70 to the cover plate 40 , the reliability and service life of the controller and the motor connected thereto are improved while ensuring the waterproof performance.

[0045] In one embodiment, the outer peripheral surface of the end cover 10 is further provided with a second opening 80 communicating with the cavity 11 , and a power socket 90 electrically connected to the control circuit board assembly 20 is provided in the second opening 80 .

[0046] The second opening 80 is provided on the outer peripheral surface of the end cap 10, opposite the first opening 30 (where the IO connector 60 is located). The shape and size of the second opening 80 are determined by the selected power socket 90. The power socket 90 is the interface for connecting the controller to an external power source.

[0047] The power supply base 90 is electrically connected to the control circuit board assembly 20 via a wire or PCB trace. The power supply base 90 is installed in a separate opening for easy arrangement and fixation.

[0048] By providing a second opening 80 on the outer peripheral surface of the end cover 10 and installing a power socket 90 , the power supply function of the controller is realized while ensuring the compactness of the overall structure and the integrity of the functions.

[0049] In this embodiment, a waterproof rubber pad 91 is provided between the power supply base 90 and the second opening 80. The waterproof rubber pad 91 is a flexible sealing material and is designed to match the shape of the power supply base 90 and the second opening 80.

[0050] The main function of the waterproof rubber pad 91 is to form a sealing barrier between the power socket 90 and the end cover 10 to prevent moisture and dust from entering the controller through the power interface.

[0051] In this embodiment, the power base 90 is connected to the end cap 10 via fasteners (e.g., bolts). This connection takes advantage of the strength of both the power base 90 and the end cap 10. The fasteners provide sufficient pressure to ensure that the waterproof rubber gasket 91 forms a reliable seal between the power base 90 and the end cap 10.

[0052] In one embodiment, the end cap 10 is a cylindrical body with one end open, and the first opening 30 (where the IO connector 60 is located) and the second opening 80 (where the power socket 90 is located) extend through opposite sides of the cylindrical body. Opposite sides refer to two surfaces on the outer wall of the cylindrical body that are symmetrical with respect to the axial direction.

[0053] The end cap 10 is a cylindrical design with one end open, which is connected to the rear end of the motor housing 110. The other end of the end cap 10 is enclosed to form the controller cavity 11. Connecting the open side of the end cap 10 to the rear end of the motor housing 110 facilitates connecting the motor lead wires to the control circuit board assembly 20 in the cavity 11.

[0054] In this embodiment, the end cover 10 is provided with a plurality of positioning holes 100 along the axial direction of the opening edge thereof.

[0055] The positioning holes 100 are small holes set on the edge of the opening of the end cover 10, which are used to locate and fix with the holes on the edge of the rear cover of the motor housing. The number of positioning holes 100 is 3-8, evenly distributed on the circumference of the end cover 10.

[0056] The positioning hole 100 can be a through hole or a threaded hole, depending on the fixing method. Taking the threaded hole as an example, the connection between the controller and the motor can be completed by inserting bolts into two adjacent holes along the motor axis and screwing nuts on the bolts.

[0057] In any of the above embodiments, the control circuit board assembly 20 is respectively connected to a MOS transistor 21 and a connector male head 22. Depending on the power requirement of the motor, a single high-power MOS transistor or multiple medium-power MOS transistors connected in parallel may be used.

[0058] The male connector 22 is the interface for connecting to the motor leads. It is soldered directly to the PCB and positioned so that it can mate with the female connector on the motor leads. The pins on the male connector 22 include the three-phase motor wires (U, V, W) and the Hall effect sensor wires.

[0059] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present invention within the scope disclosed by the present invention, which falls within the protection scope of the present invention.

Claims

1. A motor controller structure, characterized in that: include: An end cover (10) is provided with a cavity (11), a control circuit board assembly (20) is arranged in the cavity (11), a first opening (30) is provided on the end cover (10) and is communicated with the cavity (11), a cover plate (40) is provided in the first opening (30), a first glue groove (51) connected end to end is formed between the cover plate (40) and the first opening (30), a first mounting hole is provided on the cover plate (40) and is communicated with the cavity (11), an IO connector (60) electrically connected to the control circuit board assembly (20) is provided in the first mounting hole, a second glue groove (52) connected end to end is formed between the IO connector (60) and the first mounting hole, and the first glue groove (51) and the second glue groove (52) are respectively filled with a sealant that is in a flowing state when filled.

2. The motor controller structure according to claim 1, characterized in that: The outer wall of the cover plate (40) and the inner wall of the first opening (30) form the first glue groove (51) having a continuous path.

3. The motor controller structure according to claim 1, characterized in that: The outer wall of the IO connector (60) and the inner wall of the first mounting hole form the second glue groove (52) having a continuous path.

4. The motor controller structure according to claim 1, characterized in that: The cover plate (40) is further provided with a second mounting hole communicating with the cavity (11), and a waterproof breathable valve (70) is provided in the second mounting hole.

5. The motor controller structure according to claim 1, characterized in that: The end cover (10) is further provided with a second opening (80) communicating with the cavity (11), and a power socket (90) electrically connected to the control circuit board assembly (20) is provided in the second opening (80).

6. The motor controller structure according to claim 5, characterized in that: A waterproof rubber pad (91) is provided between the power socket (90) and the second opening (80).

7. The motor controller structure according to claim 6, characterized in that: The end cover (10) is a cylinder with an open end, and the first opening (30) and the second opening (80) pass through opposite sides of the cylinder.

8. The motor controller structure according to claim 7, characterized in that: The end cover (10) is provided with a plurality of positioning holes (100) at the edge of the opening.

9. The motor controller structure according to any one of claims 1 to 8, characterized in that: The control circuit board assembly (20) is respectively connected to a MOS tube (21) and a connector male head (22).

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