Side-opening door motor end cover assembly for vehicle

Abstract

The utility model discloses a motor end cover assembly for a vehicle side opening door, relates to the technical field of vehicle side opening doors, enables high and low frequency signals in a circuit to be filtered through a circuit board assembly on an end cover, can inhibit the propagation of electromagnetic interference signals, reduces the electromagnetic radiation level, improves the passing rate of EMC tests, and enables the EMC test to be stable through a thermal protector. When the temperature rises to a certain degree, the circuit is automatically switched off, the motor is effectively protected from being burnt under extreme working conditions, and the brush holder and the end cover are made of high-temperature-resistant materials, so that the brush holder and the end cover are not easy to deform at high temperature, and the electric brush is prevented from being stuck in the brush holder.

Description

Technical Field

[0001] This utility model relates to the field of automotive side-opening door technology, specifically a side-opening door motor end cover assembly for automobiles. Background Technology

[0002] In automotive side-opening door technology, intelligent door technology represents the development trend of automotive intelligence and electrification. This technology, through the integration of an electric door opening and closing system, provides multiple door opening modes, including key control, interior / exterior door handle control, and brake closing, realizing the intelligence and electrification of automobiles. Intelligent doors not only retain the traditional manual door opening and closing function, ensuring manual operation even when the entire vehicle is powered off, but also have intelligent functions, such as intelligent anti-collision sensing and all-terrain slope hovering function, as well as anti-pinch door opening and closing, and safety protection modes when the electric door opening fails during driving. Thus, while providing an intelligent experience, it ensures the safety of passengers. The side-opening door motor is the core component of automotive side-opening door technology, and the end cover assembly is the core component of the side-opening door motor.

[0003] The existing side-opening door motor only has two inductors on the end cap assembly, which fails the EMC test. This may cause the motor to malfunction when exposed to external electromagnetic interference, resulting in decreased motor efficiency or interference with other electronic devices, affecting their normal operation. The EMC does not meet customer requirements, leading to customer dissatisfaction. In addition, the existing side-opening door motor uses PA66-GF30 material for the end cap and brush holder, and lacks overheat protection. Under extreme operating conditions, the motor may stall, experience excessive current, and overheat, potentially causing the motor to burn out. Furthermore, PA66-GF30 material can deform severely at 180℃, causing the brush to become stuck in the brush holder. Summary of the Invention

[0004] The purpose of this utility model is to provide an end cover assembly for a vehicle side-opening door motor to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A side-opening door motor end cover assembly for a vehicle includes a stator assembly on one side, a rotor assembly within the stator assembly, an end cover sealing ring on the end cover assembly, a gear on the rotor assembly, a magnetic ring outside the gear, and an end cover assembly comprising an end cover, a circuit board assembly, a brush assembly, terminals, a housing sealing ring and an end cover bushing, an oil-impregnated bearing, and screws. One end of the end cover is fixedly connected to the stator assembly, and the rotor assembly is rotatably connected to the end cover. The other end of the end cover is fixedly connected to the end cover sealing ring. The gear is driven by the rotor assembly and the magnetic ring. The end cover is fixedly connected to the circuit board assembly, the brush assembly, and the terminals. The inner ring of the housing sealing ring is fitted onto the end cover, and the outer ring of the housing sealing ring is fastened to the stator assembly. The end cover bushing is fixedly connected to the end cover. The outer ring of the oil-impregnated bearing is fastened to the end cover, and the inner ring of the oil-impregnated bearing is fitted onto the outside of the rotor assembly. Screws are fastened to the end cover and are threadedly connected to the end cover.

[0007] The stator assembly and end caps provide support for the rotor assembly. The outer ring of the oil-impregnated bearing is securely connected to the end cap, fixing the bearing to the end cap. The inner ring of the oil-impregnated bearing is fitted onto the outside of the rotor assembly, allowing the rotor assembly to rotate at a predetermined speed and direction. Gears fix the rotor assembly to the stator assembly, enabling the rotor assembly to transmit power to the magnetic ring. The magnetic ring further strengthens the connection between the gears and the rotor assembly, thus making the connection between the rotor and stator assemblies more robust. An end cap sealing ring seals the end cap, preventing dust ingress. The circuit board assembly is fixed to the end cap by soldering. The circuit board assembly... The circuit can filter out unwanted frequency components, achieve a filtering effect, suppress electromagnetic radiation interference, and improve circuit stability. Through the connection of the brush assembly and terminals, external current can be conducted to the brush assembly through the terminals, and then to the rotor assembly. The inner ring of the housing seal is fitted onto the end cover, and the outer ring is tightly connected to the stator assembly, forming a tight connection between the stator assembly and the end cover. Screws pass through the holes in the brush assembly, and the screw head is tightly connected to the brush assembly. The brush assembly is fixed to the end cover through the screw and the end cover threaded connection. The end cover bushing is fixed to the end cover through injection molding.

[0008] Furthermore, the circuit board assembly includes a circuit board, a large capacitor, a small capacitor, a ferrite bead, and a TVS diode. The circuit board and the end cap are fixedly connected. There are two large capacitors, which are electrically connected to the circuit board. There are two small capacitors, which are electrically connected to the circuit board. The ferrite bead and the circuit board are electrically connected. The TVS diode and the circuit board are electrically connected.

[0009] The circuit board allows seven components to be connected according to a predetermined circuit relationship and fixed on the board using surface mount technology. Large capacitors filter out high-frequency signals, improving circuit performance and stability. Small capacitors filter out low-frequency signals, further improving performance and stability. TVS diodes respond quickly to electrostatic discharge, guiding away static electricity and effectively protecting sensitive components. When transient overvoltages occur, TVS diodes rapidly change from a high-resistance to a low-resistance state, clamping the overvoltage to a predetermined level, thus protecting the circuit. TVS diodes suppress electromagnetic interference signals, reducing electromagnetic radiation levels and improving EMC test pass rates. Ferrite beads suppress both low-frequency and high-frequency electromagnetic interference, enhancing circuit stability.

[0010] Furthermore, the brush assembly includes an inductor, a brush, a thermal protector, a brush holder, a brush holder plate, and a spring. There are two inductors and two brushes. The inductor and the brush are fixedly connected. Another inductor is fixedly connected to the thermal protector, and another brush is fixedly connected to the thermal protector. There are two brush holders. The brush holder and the brush holder plate are fixedly connected. The spring and the end cap are fixedly connected. The inductor and the terminal are electrically connected.

[0011] The brush holders are fixed to the brush holder plate by brush holder plate and brush holder riveting. The brush holders fix the brushes in place. Springs prevent the brushes from falling off or shifting due to vibration or other external factors. Inductors and terminals are electrically connected to limit rapid changes in starting current and prevent excessive current from damaging the rotor assembly and other electrical components. The brushes and inductors are connected by spot welding. The brushes conduct current from stationary parts to the rotor assembly. A thermal protector is connected in series between the inductor and brushes in the positive circuit. The thermal protector, brushes, and inductor are connected by spot welding. Under extreme operating conditions, when the motor temperature rises to 170°C, the thermal protector melts, disconnecting the positive circuit and allowing the motor temperature to gradually decrease. When the temperature drops to 145°C, the thermal protector resets, reconnecting the positive circuit. This effectively protects the motor from burning out under extreme operating conditions.

[0012] Furthermore, a grounding wire is provided on the circuit board, and the other end of the grounding wire is fixedly connected to the end cap.

[0013] By soldering one end of the grounding wire to the circuit board and fixing the other end to the end cap, the current can be guided to the ground, ensuring the stable operation of the circuit system, preventing external electromagnetic interference, ensuring safe operation, and reducing resonant interference current.

[0014] Furthermore, the end cap material is PPS-GF40.

[0015] By using PPS-GF40 material for the end caps, the high temperature resistance of the end caps is improved, making them less prone to deformation at high temperatures.

[0016] Furthermore, the brush grip material is made of copper.

[0017] By making the brush holder a copper material, the brush holder will not deform under high and low temperature impact environments, and the brush will not get stuck, thus preventing the brush holder from deforming and causing the brush to get stuck inside the brush holder.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. By adding a circuit board and mounting two large capacitors, two small capacitors, two ferrite beads, and one TVS diode on the board, these seven components are fixed to the circuit board using surface mount technology. A grounding wire is soldered onto the circuit board. The large and small capacitors filter out high and low frequency signals in the circuit. The ferrite beads suppress high and low frequency electromagnetic radiation interference, thereby improving circuit stability. The TVS diode protects against electrostatic discharge in the circuit, enhancing protection capabilities and increasing EMC test pass rate. The grounding wire guides the current to ground, ensuring stable operation of the circuit system, preventing external electromagnetic field interference, ensuring safe operation, and reducing resonant interference current.

[0020] 2. Replace the PA66-GF30 end cap material with PPS-GF40 material to make the end cap temperature resistant up to 220℃, so that the end cap is not easily deformed at high temperatures. At the same time, replace the material of the brush holder with copper material so that it will not deform under high and low temperature impact tests, and avoid the situation where the brush gets stuck in the brush holder.

[0021] 3. By connecting a thermal protector in series in the positive circuit, when the motor temperature rises sharply to 170℃ under extreme operating conditions, the thermal protector melts, disconnecting the positive circuit and stopping the motor. When the motor temperature drops to 145℃, the thermal protector resets, connecting the positive circuit and allowing the motor to operate normally, thus preventing the motor from burning out under extreme operating conditions. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rotor assembly connection of this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of part A;

[0025] Figure 4 yes Figure 2 A magnified view of part B;

[0026] Figure 5 This is a schematic diagram of the end cap assembly structure of this utility model;

[0027] Figure 6 This is a schematic diagram showing the connection between the brush and rotor assembly of this utility model;

[0028] Figure 7 This is a schematic diagram of the circuit board assembly structure of this utility model.

[0029] In the diagram: 1. Stator assembly; 2. Rotor assembly; 3. End cover seal ring; 4. Gear; 5. Magnetic ring; 6. End cover assembly; 61. End cover; 62. Circuit board assembly; 621. Circuit board; 6211. Grounding wire; 622. Large capacitor; 623. Small capacitor; 624. Magnetic bead; 625. TVS diode; 63. Brush assembly; 631. Inductor; 632. Brush; 633. Thermal protector; 634. Brush holder; 635. Brush holder plate; 636. Spring; 64. Terminal; 65. Housing seal ring; 66. End cover bushing; 67. Oil-impregnated bearing; 68. Screw. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example: Figures 1-7As shown, this utility model provides a technical solution for a side-opening door motor end cover assembly for a vehicle. The end cover assembly includes a stator assembly 1 on one side, a rotor assembly 2 within the inner ring of the stator assembly 1, an end cover sealing ring 3 on the end cover assembly, a gear 4 on the rotor assembly 2, a magnetic ring 5 outside the gear 4, and an end cover 6 comprising an end cover 61, a circuit board assembly 62, a brush assembly 63, terminals 64, a housing sealing ring 65, an end cover bushing 66, an oil-impregnated bearing 67, and screws 68. One end of the end cover 61 is fixedly connected to the stator assembly 1, and the rotor assembly 2 is rotatably connected to the end cover 61. One end of the rotor assembly 2 is connected to the stator assembly 1. Rotary connection, the other end of end cover 61 is fixedly connected to end cover sealing ring 3, gear 4 is driven to rotor assembly 2, gear 4 is driven to magnetic ring 5, end cover 61 is fixedly connected to circuit board assembly 62, end cover 61 is fixedly connected to brush assembly 63, terminal 64 is fixedly connected to circuit board assembly 62, inner ring of housing sealing ring 65 is sleeved on end cover 61, outer ring of housing sealing ring 65 is fastened to stator assembly 1, end cover bushing 66 is fixedly connected to end cover 61, outer ring of oil-impregnated bearing 67 is fastened to end cover 61, inner ring of oil-impregnated bearing 67 is sleeved on the outside of rotor assembly 2, screw 68 is fastened to end cover 61, screw 68 is threaded to end cover 61.

[0032] The stator assembly 1 and end cover 61 provide support for the rotor assembly 2. The outer ring of the oil-impregnated bearing 67 is fastened to the end cover 61, fixing the oil-impregnated bearing 67 to the end cover 61. The inner ring of the oil-impregnated bearing 67 is fitted onto the outside of the rotor assembly 2, allowing the rotor assembly 2 to rotate at a predetermined speed and direction. A gear 4 is fixed to the rotor assembly 2, enabling the rotor assembly 2 to transmit power to the magnetic ring 5. The magnetic ring 5 further strengthens the connection between the gear 4 and the rotor assembly 2, thus making the connection between the rotor assembly 2 and the stator assembly 1 more secure. The end cover sealing ring 3 seals the end cover 61 to prevent dust from entering. The circuit board assembly 62 is fixed to the end cover 61 by soldering. The circuit board assembly 62... The circuit can filter out unwanted frequency components, achieve a filtering effect, suppress electromagnetic radiation interference, and improve circuit stability. Through the connection between the brush assembly 63 and the terminal 64, external current can be conducted to the brush assembly 63 through the terminal 64, and then to the rotor assembly 2. The inner ring of the housing sealing ring 65 is fitted onto the end cover 61, and the outer ring is tightly connected to the stator assembly 1, so that the stator assembly 1 and the end cover 61 form a tight connection. The screw 68 passes through the hole of the brush assembly 63, so that the head of the screw 68 is tightly connected to the brush assembly 63. The screw is threadedly connected to the end cover 61, so that the brush assembly 63 is fixed to the end cover 61. Through injection molding, the end cover bushing 66 is fixed to the end cover 61.

[0033] like Figure 7As shown, the circuit board assembly 62 includes a circuit board 621, a large capacitor 622, a small capacitor 623, a ferrite bead 624, and a TVS diode 625. The circuit board 621 and the end cap 61 are fixedly connected. There are two large capacitors 622, which are electrically connected to the circuit board 621. There are two small capacitors 623, which are electrically connected to the circuit board 621. The ferrite bead 624 is electrically connected to the circuit board 621, and the TVS diode 625 is electrically connected to the circuit board 621.

[0034] The circuit board 621 enables seven components to be connected according to a predetermined circuit relationship and fixed on the circuit board 621 using a surface mount process. The large capacitor 622 filters out high-frequency signals in the circuit, thereby improving the circuit's performance and stability. The small capacitor 623 filters out low-frequency signals in the circuit, thereby improving the circuit's performance and stability. The TVS diode 625 can quickly respond to electrostatic discharge in the circuit, guiding away the static electricity and effectively protecting sensitive components in the circuit from damage. When a transient overvoltage occurs in the circuit, the TVS diode 625 can quickly change from a high-resistance state to a low-resistance state, clamping the overvoltage to a predetermined level, thereby protecting the circuit. The TVS diode 625 can suppress the propagation of electromagnetic interference signals and reduce electromagnetic radiation levels, thereby improving the EMC test pass rate. The ferrite bead 624 enables the circuit to suppress low-frequency and high-frequency electromagnetic radiation interference, thereby improving circuit stability.

[0035] like Figure 3 As shown, the brush assembly 8 includes an inductor 631, a brush 632, a thermal protector 633, a brush holder 634, a brush holder plate 635, and a spring 636. There are two inductors 631 and two brushes 632. The inductor 631 and the brush 632 are fixedly connected. Another inductor 631 is fixedly connected to the thermal protector 633, and another brush 632 is fixedly connected to the thermal protector 633. There are two brush holders 634. The brush holder 634 is fixedly connected to the brush holder plate 635. The spring 636 is fixedly connected to the end cap 61. The inductor 631 is electrically connected to the terminal 64, and the brush 632 is electrically connected to the rotor assembly 2.

[0036] The brush holder 634 is fixed to the brush holder plate 635 by riveting the brush holder plate 635 and the brush holder 634, which in turn fixes the brush 632. A spring 636 prevents the brush 632 from falling off or shifting due to vibration or other external factors. An inductor 631 and terminal 64 are electrically connected to limit rapid changes in the starting current and prevent excessive current from damaging the rotor assembly 2 and other electrical components. The brush 632 and inductor 631 are spot-welded together, allowing current to flow from the stationary component through the brush 632. The signal is transmitted to rotor assembly 2. A thermal protector 633 is connected in series between inductor 631 and brush 632 in the positive circuit. The thermal protector 633, brush 632, and inductor 631 are connected by spot welding. Under extreme operating conditions, when the temperature rises to 170°C, the thermal protector 633 melts, disconnecting the positive circuit and causing the motor temperature to gradually decrease. When the temperature drops to 145°C, the thermal protector 633 resets, reconnecting the positive circuit. This effectively protects the motor from burning out under extreme operating conditions.

[0037] like Figure 7 As shown, a grounding wire 6211 is provided on the circuit board 621, and the other end of the grounding wire 6211 is fixedly connected to the end cover 61.

[0038] By soldering one end of the grounding wire 6211 to the circuit board 621 and fixing the other end to the end cover 61, the current can be guided to the ground, ensuring the stable operation of the circuit system, preventing external electromagnetic field interference, ensuring safe operation, and reducing resonant interference current.

[0039] like Figure 1 and Figure 2 As shown, the end cap 61 is made of PPS-GF40 material.

[0040] By using PPS-GF40 material for the end cap 61, the high temperature resistance of the end cap 61 is improved, thus making the end cap 61 less prone to deformation at high temperatures.

[0041] like Figure 5 As shown, the brush holder 634 is made of copper.

[0042] By making the brush holder 634 a copper material, the brush holder 634 will not deform under high and low temperature impact environments, and the brush 84 will not get stuck. This prevents the brush holder 634 from deforming and causing the brush 84 to get stuck inside the brush holder 634.

[0043] Working principle: The end cover 61 and stator assembly 1 provide support for the rotor assembly 2. The oil-impregnated bearing 67 allows the rotor assembly 2 to rotate along the central axis of the stator assembly 1. The housing seal ring 5 seals the connection between the stator assembly 1 and the end cover 61, improving the stability of the connection. A gear 4 installed at one end of the rotor assembly 2 transmits power to the magnetic ring 5, which further strengthens the connection between the gear 4 and the rotor assembly 2, thus making the connection between the rotor assembly 2 and the stator assembly 1 more robust. A circuit board 621 is installed on the end cover 61, and two large capacitors 622 and two small capacitors 623 are installed on the circuit board 621 to filter out high and low frequency signals. A magnetic bead 624 is installed to suppress low and high frequencies. To mitigate electromagnetic interference, a TVS diode 625 is installed to protect the motor from electrostatic discharge. A grounding wire 6211 guides the resonant interference current to ground. The brush holder 634 is made of copper to prevent deformation of the fixed brush 632 under high and low temperature shocks, thus preventing the brush 632 from jamming. Two inductors 631 allow current to be delivered from terminal 64 through inductors 631 and brush 632 to the rotor assembly 2. A spring 636 reduces the vibration of brush 632 and brush holder 634 during rotor assembly 2 rotation. A thermal protector 633 is connected in series in the positive circuit to prevent the motor from overheating and burning out. The end cover 61 is made of PPS-GF40 material to prevent deformation at high temperatures.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A side-opening door motor end cover assembly for a vehicle, wherein a stator assembly (1) is provided on one side of the motor end cover assembly, a rotor assembly (2) is provided on the inner ring of the stator assembly (1), an end cover sealing ring (3) is provided on the motor end cover assembly, a gear (4) is provided on the rotor assembly (2), and a magnetic ring (5) is provided on the outside of the gear (4), characterized in that: The motor end cover assembly (6) includes an end cover (61), a circuit board assembly (62), a brush assembly (63), a terminal (64), a housing sealing ring (65), an end cover bushing (66), an oil-impregnated bearing (67), and screws (68). One end of the end cover (61) is fixedly connected to the stator assembly (1), and the rotor assembly (2) is rotatably connected to the end cover (61). One end of the rotor assembly (2) is rotatably connected to the stator assembly (1), and the other end of the end cover (61) is fixedly connected to the end cover sealing ring (3). The gear (4) is driven by the rotor assembly (2), and the gear (4) is driven by the magnetic ring (5). The end cap (61) is fixedly connected to the circuit board assembly (62), the end cap (61) is fixedly connected to the brush assembly (63), the terminal (64) is fixedly connected to the circuit board assembly (62), the inner ring of the housing sealing ring (65) is fitted on the end cap (61), the outer ring of the housing sealing ring (65) is fastened to the stator assembly (1), the end cap bushing (66) is fixedly connected to the end cap (61), the outer ring of the oil-impregnated bearing (67) is fastened to the end cap (61), the inner ring of the oil-impregnated bearing (67) is fitted on the outside of the rotor assembly (2), the screw (68) is fastened to the end cap (61), and the screw (68) is threadedly connected to the end cap (61).

2. The vehicle side-opening door motor end cover assembly according to claim 1, characterized in that: The circuit board assembly (62) includes a circuit board (621), a large capacitor (622), a small capacitor (623), a ferrite bead (624), and a TVS diode (625). The circuit board (621) and the end cap (61) are fixedly connected. There are two large capacitors (622), which are electrically connected to the circuit board (621). There are two small capacitors (623), which are electrically connected to the circuit board (621). The ferrite bead (624) is electrically connected to the circuit board (621). The TVS diode (625) is electrically connected to the circuit board (621).

3. The vehicle side-opening door motor end cover assembly according to claim 1, characterized in that: The brush assembly (63) includes an inductor (631), a brush (632), a thermal protector (633), a brush holder (634), a brush holder plate (635), and a spring (636). There are two inductors (631) and two brushes (632). The inductor (631) and the brush (632) are fixedly connected. Another inductor (631) is fixedly connected to the thermal protector (633), and another brush (632) is fixedly connected to the thermal protector (633). There are two brush holders (634). The brush holder (634) and the brush holder plate (635) are fixedly connected. The spring (636) is fixedly connected to the end cap (61). The inductor (631) is electrically connected to the terminal (64), and the brush (632) is electrically connected to the rotor assembly (2).

4. The vehicle side-opening door motor end cover assembly according to claim 3, characterized in that: A grounding wire (6211) is provided on the circuit board (621), and the other end of the grounding wire (6211) is fixedly connected to the end cap (61).

5. The vehicle side-opening door motor end cover assembly according to claim 4, characterized in that: The end cap (61) is made of PPS-GF40 material.

6. The vehicle side-opening door motor end cover assembly according to claim 5, characterized in that: The brush holder (634) is made of copper.

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