Motor structure with injection molding type end cover

Abstract

The utility model relates to the technical field of motors, and particularly discloses a motor structure with an injection-molded end cover, which comprises a shell. The stator assembly is arranged in the shell, the rotor assembly is used in cooperation with the stator assembly and arranged in a rotating mode relative to the shell, an end cover assembly is arranged on the shell and made of an insulating material, a conducting strip used for connecting the rotor assembly and an external grounding wire is arranged on the end cover assembly, and the end cover assembly is made of the insulating material. The end cover assembly of the motor can effectively prevent electrical breakdown or short circuit accidents caused by electrical faults during operation of the motor, can ensure that leakage current is effectively guided to a ground wire when electrical leakage occurs, further improves the safety performance of the motor, and meanwhile, the insulating material can resist certain environmental erosion, so that the end cover assembly of the motor has longer service life, and the service life of the motor is prolonged. And compared with an aluminum alloy end cover in the prior art, more cost is saved, direct injection molding can be selected, and the machining difficulty / machining cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular discloses a motor structure with an injection-molded end cap. Background Technology

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is divided into electric motors (symbol M) and generators (symbol G). Among them, an electromagnetic DC motor consists of stator poles, rotor (armature), commutator (commonly known as rectifier), brushes, housing, bearings, etc.

[0003] With the development of industries such as robotics and electric vehicles, motors are ubiquitous. The end caps of existing motors are mostly made of aluminum alloy, which increases costs and makes processing more difficult. They usually require multiple processing steps before they can be put into use. Therefore, there is an urgent need for a motor structure with injection-molded end caps. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, which increase costs and make processing difficult, the purpose of this utility model is to provide a motor structure with an injection-molded end cap.

[0005] To achieve the above objectives, the present invention provides a motor structure with an injection-molded end cap, comprising a housing; and further comprising a stator assembly disposed inside the housing, a rotor assembly used in conjunction with the stator assembly and rotatably disposed relative to the housing, the housing being provided with an end cap assembly, the end cap assembly being made of insulating material, and the end cap assembly being provided with a conductive sheet for connecting the rotor assembly and an external grounding wire.

[0006] Preferably, the end cap assembly is made of plastic and has fins. The fins are used to strengthen the end cap structure and improve heat dissipation. The addition of fins not only serves as a heat dissipation element but also increases the structural strength of the end cap assembly. Plastic itself may not be as strong as metal, but by adding fins, the stability and deformation resistance of the overall structure can be improved, thereby improving the durability of the motor without significantly increasing the weight. At the same time, compared with metal materials, plastic end cap assemblies are lighter. This weight reduction can reduce the weight of the entire motor, making the motor more suitable for applications that require lightweight equipment.

[0007] Preferably, the motor also includes bearings, and the rotor assembly includes a shaft. The shaft is rotatably mounted relative to the end cover assembly via the bearings. The presence of the bearings helps reduce friction between the shaft and the end cover, thereby reducing wear and improving the efficiency and lifespan of the motor. At the same time, the presence of the bearings allows the shaft to rotate more smoothly, reducing unnecessary vibration or noise caused by friction. This is very important for ensuring the normal operation of the motor and improving the reliability of the equipment.

[0008] Preferably, the end cover assembly includes an upper end cover and a lower end cover. The upper and lower end covers are disposed at the upper and lower ends of the housing to protect / support the rotor assembly. The presence of the upper and lower end covers provides an additional protective layer for the rotor assembly, which can effectively prevent external impurities, dust, liquids, etc. from entering the motor, thereby reducing damage to the rotor assembly and helping to extend the service life of the motor. The design of the end cover assembly helps to improve the sealing performance of the motor and prevent liquids or dust from entering the motor.

[0009] Preferably, the upper and lower end covers are provided with connectors. The connectors are used to fix the upper and lower end covers relative to the housing. Using connectors to fix the upper and lower end covers to the housing can provide additional structural stability, which helps to ensure that the motor remains firm during operation and prevents the components from loosening or shifting due to vibration or impact. By using connectors, the assembly and disassembly process of the motor can be simplified, making it more convenient and faster to repair or replace components, and reducing maintenance time and costs.

[0010] Preferably, the upper end cover is provided with a first block and a carbon brush. The first block has a first groove for accommodating the carbon brush. The first block is made of insulating material. The use of insulating material provides necessary electrical insulation for the motor. This insulation protection can prevent current leakage or short circuit, ensuring the safety of the motor and the operator. By specially opening a first groove on the first block to accommodate the carbon brush, it can be ensured that the carbon brush remains stable during motor operation. A stable carbon brush position is very important for maintaining good electrical contact and reducing carbon brush wear.

[0011] Preferably, the working end face of the carbon brush is in contact with the rotor assembly, and two carbon brushes are provided to conduct current to drive the motor to rotate.

[0012] Preferably, the rotor assembly also includes a rectifier disposed on the shaft, which is used to convert current, to convert alternating current to direct current, or vice versa, to help ensure the proper operation of the internal electrical system of the motor.

[0013] Preferably, the upper cover is also provided with a metal ring electrically connected to the rotor assembly and a conductive plate electrically connected to the metal ring. The conductive plate is used to connect to the external ground wire. By setting the metal ring and the conductive plate, the electrical connection between the external ground wire and the rotor assembly can be ensured to be more stable and reliable. The use of the metal ring and the conductive plate can reduce the resistance in the current transmission process, thereby reducing energy loss and heat generation, which is very important for improving the efficiency and reliability of the entire system. If the conductive plate or the metal ring is damaged, this design also makes it relatively easy to replace them without replacing the entire rotor assembly / upper cover, effectively reducing maintenance costs and complexity.

[0014] Preferably, the upper end cap, the first block, and the fins are integrally injection molded. Integral injection molding makes the upper end cap, the first block, and the fins a single structural component. This integrated design increases the structural strength and stability of the entire assembly, reduces the risk of failure caused by seams or connection points, and effectively reduces the weight of the overall structure by reducing the number of parts that need to be connected by bolts, welding, or other mechanical fixing methods. Furthermore, the integral injection molding process simplifies the production process, reduces assembly time and costs, and greatly improves production efficiency.

[0015] The beneficial effects of this utility model are as follows: The end cover assembly is made of insulating material, which can effectively prevent electrical breakdown or short circuit accidents caused by electrical faults during motor operation, thereby improving the safety of motor use. At the same time, by connecting to an external grounding wire, it can be ensured that the leakage current is effectively guided to the ground wire in the event of electrical leakage, further improving the safety performance of the motor. In addition, the insulating material can resist certain environmental corrosion, such as moisture and chemical corrosion, which makes the motor end cover assembly have a longer service life and reduces the risk of damage caused by environmental factors. Moreover, compared with the aluminum alloy end cover in the prior art, it is more cost-effective, can be directly injection molded, has lower processing difficulty and processing cost, and helps to reduce the weight of the end cover / motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the motor body structure of this utility model;

[0017] Figure 2 This is an exploded view of the motor body structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the end cap structure of this utility model;

[0019] Figure 4 This is an exploded view of the end cap structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-section of the motor body of this utility model;

[0021] Figure 6 This is a schematic diagram of a common motor structure based on existing publicly available technology.

[0022] The reference numerals in the figures include:

[0023] 1—Housing; 2—Stator assembly; 3—Rotor assembly

[0024] 4—End cap assembly; 5—Fan; 6—Circuit assembly

[0025] 7—Connector 31—Shaft 32—Magnet

[0026] 33—Coil; 34—Rectifier; 41—Upper end cover

[0027] 42—Lower end cover; 43—First block; 44—Fin

[0028] 45—Bearing; 46—Metal Ring; 47—First Groove

[0029] 61—First cable; 62—Second cable; 63—Conductive sheet

[0030] 64—Carbon Brush Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0032] Please see Figures 1 to 6 As shown, the present invention discloses a motor structure with injection-molded end caps, including a housing 1; and a stator assembly 2 disposed inside the housing 1, a rotor assembly 3 used in conjunction with the stator assembly 2 and rotatably disposed relative to the housing 1, and an end cap assembly 4 disposed on the housing 1. The end cap assembly 4 is made of insulating material and has a conductive sheet 63 disposed on the end cap assembly 4 for connecting the rotor assembly 3 and an external grounding wire.

[0033] Specifically, the end cap assembly 4 is made of insulating material, which can effectively prevent electrical breakdown or short circuit accidents caused by electrical faults during motor operation, thereby improving the safety of motor use. At the same time, by connecting to an external grounding wire, it can be ensured that leakage current is effectively guided to the ground wire in the event of electrical leakage, further improving the safety performance of the motor. Meanwhile, the insulating material can resist certain environmental corrosion, such as moisture and chemical corrosion, which makes the motor end cap assembly have a longer service life and reduces the risk of damage caused by environmental factors. Moreover, compared with the aluminum alloy end caps in the existing technology, it is more cost-effective, can be directly injection molded, has lower processing difficulty and processing cost, and helps to reduce the weight of the end cap / motor.

[0034] Specifically, the housing 1 is approximately cylindrical in shape to make the internal structure of the motor more compact.

[0035] Specifically, the stator assembly 2 is mounted on the housing 1 in ways including but not limited to snap-fitting and bonding.

[0036] Specifically, the housing 1 is also provided with threaded holes (not shown in the figure), and there are no fewer than two threaded holes. The threaded holes are used to install external brackets to facilitate the placement / installation of the motor. The brackets are provided with matching threaded holes.

[0037] Specifically, the end cap assembly 4 is made of plastic and has fins 44. The fins 44 are used to strengthen the end cap structure and improve heat dissipation. The addition of fins not only serves as a heat dissipation element, but also increases the structural strength of the end cap assembly. Plastic itself may not be as strong as metal, but by adding fins, the stability and deformation resistance of the overall structure can be improved, thereby improving the durability of the motor without significantly increasing the weight. At the same time, compared with metal materials, plastic end cap assemblies are lighter. This weight reduction can reduce the weight of the entire motor, making the motor more suitable for applications that require lightweight equipment.

[0038] Specifically, the end cap assembly 4 can also be made of materials such as graphene and ceramics.

[0039] Specifically, the motor also includes a bearing 45, and the rotor assembly 3 includes a shaft 31. The shaft 31 is rotatably mounted relative to the end cover assembly 4 via the bearing 45. The presence of the bearing helps to reduce friction between the shaft and the end cover, thereby reducing wear and helping to improve the efficiency and life of the motor. At the same time, the presence of the bearing allows the shaft to rotate more smoothly, reducing unnecessary vibration or noise caused by friction, which is very important for ensuring the normal operation of the motor and improving the reliability of the equipment.

[0040] Specifically, the rotor assembly 3 also includes a magnet 32 ​​disposed on the shaft 31 and a coil 33 wound on the magnet 32.

[0041] Specifically, the end cover assembly 4 includes an upper end cover 41 and a lower end cover 42. The upper end cover 41 and the lower end cover 42 are disposed at the upper and lower ends of the housing 1 to protect / support the rotor assembly 3. The presence of the upper end cover 41 and the lower end cover 42 provides an additional protective layer for the rotor assembly 3, which can effectively prevent external impurities, dust, liquids, etc. from entering the motor, thereby reducing damage to the rotor assembly 3 and helping to extend the service life of the motor. The design of the end cover assembly 4 helps to improve the sealing performance of the motor and prevent liquids or dust from entering the motor.

[0042] Specifically, there are two bearings 45, which are respectively installed on the upper end cover 41 and the lower end cover 42.

[0043] Specifically, the upper end cover 41 and the lower end cover 42 are provided with connectors 7. The connectors 7 are used to fix the upper end cover 41 and the lower end cover 42 relative to the housing 1. Using connectors 7 to fix the upper end cover 41 and the lower end cover 42 to the housing 1 can provide additional structural stability, which helps to ensure that the motor remains firm during operation and prevents the components from loosening or shifting due to vibration or impact. By using connectors 7, the assembly and disassembly process of the motor can be simplified, making it more convenient and faster to repair or replace components, and reducing maintenance time and costs.

[0044] Specifically, in this embodiment, the connector 7 is a bolt. The connector 7 shortens the distance between the two end caps, so that the two end caps abut against the housing 1, thereby limiting and fixing them.

[0045] Specifically, the upper cover 41 is provided with a first block 43 and a carbon brush 64. The first block 43 has a first groove 47 for accommodating the carbon brush 64. The first block 43 is made of insulating material, which provides necessary electrical insulation for the motor. This insulation protection can prevent current leakage or short circuit, and ensure the safety of the motor and the operator. By specially opening the first groove 47 on the first block 43 to accommodate the carbon brush 64, it can be ensured that the carbon brush remains stable during the operation of the motor. The stable carbon brush position is very important for maintaining good electrical contact and reducing carbon brush wear.

[0046] Specifically, the first block 43 may also be provided with a locking component for locking the carbon brush 64. The locking component is used to ensure the stability of the carbon brush 64 during operation and to facilitate the replacement of the carbon brush 64.

[0047] Specifically, the working end face of the carbon brush 64 contacts the rotor assembly 3. The carbon brush 64 is provided with two to conduct current to the rotor assembly 3, thereby driving the motor to rotate.

[0048] Specifically, the rotor assembly 3 also includes a rectifier 34 disposed on the shaft 31. The rectifier 34 is used to convert current, to convert alternating current (AC) to direct current (DC), or vice versa, which helps to ensure the proper operation of the internal electrical system of the motor.

[0049] Specifically, the upper cover 41 is also provided with a metal ring 46 electrically connected to the rotor assembly 3 and a conductive plate 63 electrically connected to the metal ring 46. The conductive plate 63 is used to connect to the external ground wire. The setting of the metal ring 46 and the conductive plate 63 can ensure that the electrical connection between the external ground wire and the rotor assembly 3 is more stable and reliable. The use of the metal ring 46 and the conductive plate 63 can reduce the resistance in the current transmission process, thereby reducing energy loss and heat generation, which is very important for improving the efficiency and reliability of the entire system. If the conductive plate 63 or the metal ring 46 is damaged, this design also makes it relatively easy to replace them without replacing the entire rotor assembly 3 / upper cover 41, effectively reducing maintenance costs and complexity.

[0050] Specifically, the metal ring 46 is electrically connected to the rotor assembly 3 / the bearing 45 which is electrically connected to the rotor assembly 3.

[0051] Specifically, protrusions and grooves can be provided on the metal ring 46 and the conductive sheet 63 respectively to further enhance the connection stability between the metal ring 46 and the conductive sheet 63.

[0052] Specifically, the conductive sheet 63 may also be provided with screw holes for external screws to fix the metal ring 46 and the conductive sheet 63.

[0053] Specifically, the upper cover 41, the first block 43, and the fins 44 are integrally injection molded. This integral injection molding makes the upper cover 41, the first block 43, and the fins 44 a single structural component. This integrated design increases the structural strength and stability of the entire assembly, reduces the risk of failure caused by seams or connection points, and effectively reduces the weight of the overall structure by reducing the number of parts that need to be connected by bolts, welding, or other mechanical fixing methods. Furthermore, the integral injection molding process simplifies the production process, reduces assembly time and costs, and greatly improves production efficiency.

[0054] Specifically, the motor also includes a first cable 61 and a second cable 62, which are electrically connected to the carbon brush 64 and the conductive sheet 63, respectively. The first cable 61 is used to connect to an external power source, and the second cable 62 is used to connect to an external grounding wire.

[0055] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A motor structure with an injection-molded end cover, comprising a housing (1); characterized in that: The invention also comprises a stator assembly (2) arranged inside the housing (1), a rotor assembly (3) used in conjunction with the stator assembly (2) and rotatably arranged relative to the housing (1), an end cover assembly (4) arranged on the housing (1), the end cover assembly (4) being made of an insulating material, and a conductive sheet (63) for connecting the rotor assembly (3) and an external grounding wire being arranged on the end cover assembly (4).

2. A motor structure with an injection-molded end cover according to claim 1, characterized in that: The end cover assembly (4) is made of plastic material. Fins (44) are arranged on the end cover assembly (4). The fins (44) are used to strengthen the end cover structure.

3. The motor structure with an injection-molded end cover according to claim 1, characterized in that: The motor further comprises a bearing (45), and the rotor assembly (3) comprises a shaft body (31), and the shaft body (31) is rotatably arranged via the bearing (45) and the end cover assembly (4).

4. The motor structure with an injection-molded end cover according to claim 2, characterized in that: The end cover assembly (4) comprises an upper end cover (41) and a lower end cover (42). The upper end cover (41) and the lower end cover (42) are respectively arranged at the upper and lower ends of the housing (1) to protect / support the rotor assembly (3).

5. The motor structure with an injection-molded end cover according to claim 4, characterized in that: The upper end cover (41) and the lower end cover (42) are provided with connecting pieces (7), and the connecting pieces (7) are used to fix the upper end cover (41) and the lower end cover (42) relative to the housing (1).

6. The motor structure with an injection-molded end cover according to claim 4, characterized in that: A first block (43) and a carbon brush (64) are arranged on the upper end cover (41); a first groove (47) for accommodating the carbon brush (64) is provided on the first block (43); and the first block (43) is made of insulating material.

7. The motor structure with an injection-molded end cover according to claim 4, characterized in that: The upper end cover (41) is also provided with a metal ring (46) electrically connected to the rotor assembly (3) and a conductive sheet (63) electrically connected to the metal ring (46); the conductive sheet (63) is used to be connected to an external ground wire.

8. The motor structure with an injection-molded end cover according to claim 6, characterized in that: The working end surface of the carbon brush (64) is electrically connected to the rotor assembly (3), and two carbon brushes (64) are provided for conducting the rotor assembly (3).

9. The motor structure with an injection-molded end cover according to claim 3, characterized in that: The rotor assembly (3) also includes a rectifier (34) arranged on the shaft body (31), and the rectifier (34) is used to convert the current state.

10. The motor structure with an injection-molded end cover according to claim 6, characterized in that: The upper end cover (41), the first block (43), and the fins (44) are integrally injection molded.

Images