Motor cast housing structure

Abstract

The utility model relates to power motor technical field, especially a motor casting shell structure, including through the integrated casting forming shell body, the shell body is provided with the cavity, the cavity includes by inside to outside setting drive placement part, output placement part and sealed connecting portion, the shell body is located the outer periphery of cavity and is provided with output mounting portion, the outer periphery of output mounting portion is provided with a plurality of mounting rib strips, one end of mounting rib strip is provided with mounting hole. The utility model has reduced the number of parts, has simplified the production technological process, has reduced the subsequent assembly complexity and manufacturing cost, and simultaneously is favorable to the realization lightweight design of structure, has optimized the utilization efficiency of material under the premise of guaranteeing performance.

Description

Technical Field

[0001] This utility model relates to the field of power motor technology, and in particular to a motor casting housing structure. Background Technology

[0002] In the field of motor design and manufacturing, the housing, as a core structural component, not only supports and protects the internal components, but its strength, precision, and sealing performance also directly affect the motor's reliability, lifespan, and operating efficiency. Traditional motor housings often employ a split structure, combining multiple parts through bolting, welding, or splicing. This type of structure has significant limitations: First, splicing multiple parts easily creates structural weaknesses and accumulated assembly errors at the joints, affecting overall rigidity and coaxiality, leading to vibration and noise during operation and reduced transmission accuracy. Second, welds or joints may have discontinuous sealing issues, allowing contaminants to easily penetrate in dusty, humid, or corrosive industrial environments, damaging internal electrical and mechanical components. Furthermore, split manufacturing and subsequent assembly processes are cumbersome, resulting in high production costs and making it difficult to achieve complex lightweight topology optimization.

[0003] As industrial equipment develops towards higher efficiency, higher reliability, and greater intelligence, especially in applications such as robot joint motors and servo drive systems, more stringent requirements are being placed on motor performance: higher structural strength and dynamic stiffness, excellent vibration resistance, good sealing protection, and better power density are required. Traditional split-type housings can no longer fully meet these needs, especially when subjected to complex alternating loads, they are prone to fatigue damage, and their manufacturing processes restrict the integration and lightweighting of structural designs.

[0004] Therefore, there is an urgent need for a new type of integrated motor housing structure that can achieve higher structural integrity, dimensional consistency and sealing performance through integral molding process, while integrating reasonable functional partitioning and reinforcement design to improve the overall performance and application adaptability of the motor. Utility Model Content

[0005] To address the aforementioned issues, this invention reduces the number of parts, simplifies the production process, lowers subsequent assembly complexity and manufacturing costs, and facilitates lightweight structural design. It also optimizes material utilization efficiency in the motor casting housing structure while ensuring performance.

[0006] The technical solution adopted by this utility model is: a motor casting housing structure, including a housing body integrally cast, the housing body being provided with a cavity, the cavity including a drive mounting part, an output mounting part and a sealing connection part arranged sequentially from the inside to the outside, the housing body being provided with an output mounting part on the outer periphery of the cavity, the output mounting part being provided with a plurality of mounting ribs on the outer periphery of the output mounting part, and one end of the mounting ribs being provided with a mounting hole.

[0007] A further improvement to the above solution is that an end cover is provided at the bottom of the drive mounting part of the outer shell body. The end cover is a metal end cover and is used for heat dissipation of the motor in the drive mounting part.

[0008] A further improvement to the above solution is that a first step is provided between the output mounting part and the drive mounting part, and a second step is provided between the output mounting part and the sealing connection part, both the first step and the second step being used for mounting bearings.

[0009] A further improvement to the above solution is that the output mounting part is provided with an output gear ring, which is integrally cast in the output mounting part and used to connect the motor output.

[0010] A further improvement to the above solution is that the sealing connection part is provided with a mounting groove, which is used to install a retaining ring to fix the bearing.

[0011] A further improvement to the above solution is that the mounting slot and the end of the outer shell body are provided with a sealing inner wall for abutting the sealing element.

[0012] A further improvement to the above solution is that the output mounting part is provided with a weight reduction groove, and there are multiple weight reduction grooves. The multiple weight reduction grooves are evenly distributed in a circumferential direction between the output mounting part and the outer shell body, and a connecting rib is provided between two adjacent weight reduction grooves.

[0013] A further improvement to the above solution is that a protrusion is provided at the tail of the outer casing, and one end of the protrusion protrudes from the output mounting portion.

[0014] A further improvement to the above scheme is that the two ends of the mounting rib are respectively provided with a first slope and a second slope, and the first slope and the second slope are inclined towards the two ends with the center of the mounting rib.

[0015] A further improvement to the above solution is that a threaded sleeve is provided inside the mounting hole.

[0016] The beneficial effects of this utility model are: Compared to existing motor housings, this utility model employs a one-piece casting process for the housing body, eliminating structural weaknesses and assembly errors that may exist in traditional multi-part splicing or welding, greatly improving the overall mechanical strength, rigidity, and dimensional consistency. The cavity adopts an integrated design with the drive mounting section, output mounting section, and sealing connection section arranged sequentially from the inside out. This provides a precise and stable positioning and installation foundation for the drive unit, transmission output unit, and sealing elements inside the motor, ensuring coaxiality and relative positional accuracy between functional units. This effectively reduces vibration, noise, and abnormal wear caused by misalignment, improving the smoothness and reliability of motor operation. The output mounting section located on the outer periphery of the cavity and its multiple mounting ribs enhance the connection rigidity and torsional vibration resistance between the housing and external equipment or base. As a reinforcing structure, the mounting ribs optimize load distribution, more evenly transmitting the reaction force during motor operation and external loads to the mounting foundation, avoiding stress concentration, and improving the structural stability and service life of the entire machine under complex working conditions. The mounting holes at the ends of the ribs facilitate the connection of standardized fasteners, simplifying the assembly process. The one-piece molded cavity structure itself has excellent sealing continuity. Combined with a specially designed sealing connection, it forms a highly complete protective barrier for the inside of the motor, effectively preventing the intrusion of external dust, moisture, and other contaminants, thus improving the motor's environmental adaptability. This utility model reduces the number of parts, simplifies the production process, and lowers the complexity and manufacturing cost of subsequent assembly. It also facilitates a lightweight structural design and optimizes material utilization efficiency while ensuring performance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the motor casting housing structure of this utility model; Figure 2 for Figure 1 A three-dimensional view of the casing structure of Zhongdian Motor from another perspective; Figure 3 for Figure 1 Front view of the cast housing structure of Zhongdian Motor; Figure 4 for Figure 3 Sectional view of AA.

[0018] Explanation of reference numerals in the attached drawings: outer casing 10, cavity 1, drive mounting part 11, output mounting part 12, first step 121, second step 122, output gear ring 123, sealing connection part 13, mounting slot 131, sealing inner wall 132, output mounting part 2, mounting rib 21, mounting hole 211, first ramp 212, second ramp 213, threaded sleeve 214, weight reduction groove 22, connecting rib 221, end cap 3, protrusion 4. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-4As shown, in one embodiment of this utility model, a cast housing structure for an electric motor is disclosed, comprising a housing body 10 integrally cast. The housing body 10 has a cavity 1, which includes a drive mounting portion 11, an output mounting portion 12, and a sealing connection portion 13 arranged sequentially from the inside to the outside. An output mounting portion 2 is provided on the outer periphery of the housing body 10 at the cavity 1, and a plurality of mounting ribs 21 are provided on the outer periphery of the output mounting portion 2. One end of each mounting rib 21 is provided with a mounting hole 211. In this embodiment, the housing body 10 adopts an integral casting process, eliminating the structural weaknesses and assembly errors that may exist in traditional multi-part splicing or welding, and greatly improving the mechanical strength, rigidity, and dimensional consistency of the overall structure. The cavity 1 adopts an integrated design with a drive mounting section 11, an output mounting section 12, and a sealing connection section 13 arranged sequentially from the inside to the outside. This provides a precise and stable positioning and installation foundation for the drive unit, transmission output unit, and sealing elements inside the motor, ensuring the coaxiality and relative position accuracy between the functional units. This effectively reduces vibration, noise, and abnormal wear caused by misalignment, and improves the smoothness and reliability of motor operation. The output mounting section 2 located on the outer periphery of the cavity 1 and the multiple mounting ribs 21 thereon enhance the connection rigidity and anti-torsional vibration capability between the outer shell and external equipment or base. As a reinforcing structure, the mounting ribs 21 optimize the load distribution, enabling the reaction force during motor operation and external loads to be transmitted more evenly to the mounting foundation, avoiding stress concentration and improving the structural stability and service life of the entire machine under complex working conditions. The mounting holes 211 at the ends of the ribs facilitate the connection of standardized fasteners, simplifying the assembly process. The integrally molded cavity 1 structure itself has excellent sealing continuity. Combined with the specially designed sealing connection part 13, it forms a highly complete protective barrier for the inside of the motor, effectively preventing the intrusion of external dust, moisture and other pollutants, thus improving the motor's environmental adaptability. This embodiment reduces the number of parts, simplifies the production process, reduces subsequent assembly complexity and manufacturing costs, and facilitates lightweight structural design, optimizing material utilization efficiency while ensuring performance.

[0022] An end cover 3, which is a metal end cover 3, is provided at the bottom of the drive housing 11 of the outer casing 10 for heat dissipation of the motor inside the drive housing 11. In this embodiment, the metal end cover 3 is added to the bottom of the motor casting outer casing structure of the drive housing 11, which improves the thermal management performance and reliability of the motor. Due to its excellent thermal conductivity, the metal end cover 3 can efficiently and quickly conduct the heat generated by the motor during operation inside the drive housing 11 to the external environment, effectively reducing the steady-state operating temperature of the core area inside the motor. This avoids problems such as aging of insulation materials, attenuation of magnetic properties, or lubrication failure caused by overheating, thereby extending the service life and operational reliability of the motor.

[0023] A first step 121 is provided between the output mounting part 12 and the drive mounting part 11, and a second step 122 is provided between the output mounting part 12 and the sealing connection part 13. Both the first step 121 and the second step 122 are used for mounting bearings. In this embodiment, by providing a first step 121 between the output mounting part 12 and the drive mounting part 11, and a second step 122 between the output mounting part 12 and the sealing connection part 13, and by assigning bearing mounting functions to both steps, a high-precision and high-rigidity support structure for the motor spindle system is achieved. The double-step bearing mounting design provides the motor shaft with dual precise positioning in both the axial and radial directions, enhancing the coaxiality and operational stability of the spindle, effectively suppressing radial runout and axial movement that may occur during high-speed operation, thereby improving the transmission accuracy of the motor and reducing vibration and noise. The stepped distribution of the two bearing steps optimizes the load distribution structure, allowing the radial and axial forces on the shaft to be effectively transmitted to the robust integrated housing body 10 through support points of different heights, reducing the load on individual bearings and improving the overall structure's load-bearing capacity and long-term operational reliability.

[0024] The output mounting section 12 is provided with an output gear ring 123, which is integrally cast in the output mounting section 12 and is used to connect the motor output. In this embodiment, by integrally casting the output gear ring 123 and the outer shell body 10 in the output mounting section 12, high strength, high precision, and high reliability of the connection structure are achieved. This eliminates the fit clearance, fretting wear, and assembly errors that may exist in traditional split gear rings connected by keys, pins, or interference fits, ensuring a gapless and high rigidity power transmission path, improving transmission efficiency and accuracy, and reducing vibration and noise. The integral molding process forms a metallurgical bond between the gear ring and the outer shell body 10, and its connection strength is much higher than that of a mechanical connection. It can withstand greater torque and impact loads, improving the reliability and lifespan of the motor under heavy load or frequent start-stop conditions.

[0025] The sealing connection portion 13 is provided with a mounting groove 131, which is used to install a retaining ring to fix the bearing. Specifically, the mounting groove 131 and the end of the outer shell body 10 are provided with a sealing inner wall 132 for abutting against the sealing element. In this embodiment, the mounting groove 131 and the sealing inner wall 132 at the end of the outer shell body 10 work together to achieve reliable fixing of the bearing and efficient sealing of the cavity 1. The mounting groove 131 provides a precise axial positioning and installation base for the retaining ring, enabling the retaining ring to stably and conveniently press against the outer ring of the bearing, effectively preventing axial movement of the bearing during operation, and ensuring the positioning accuracy and operational stability of the spindle system. The sealing inner wall 132, integrally formed with the groove, constitutes a smooth and continuous sealing surface, providing uniform abutment support for the sealing element and improving the dynamic and static sealing effect. The output mounting section 2 is provided with multiple weight-reducing grooves 22, which are evenly distributed circumferentially between the output mounting section 2 and the outer casing 10. Connecting ribs 221 connect adjacent weight-reducing grooves 22. In this embodiment, by evenly distributing multiple weight-reducing grooves 22 circumferentially between the output mounting section 2 and the outer casing 10, and by providing connecting ribs 221 between adjacent weight-reducing grooves 22, the synergistic optimization of lightweight and high rigidity of the motor casing structure is achieved. The multiple evenly distributed circumferential weight-reducing grooves 22 effectively remove redundant material in non-load-bearing areas, reducing the overall weight and moment of inertia of the motor, which is beneficial for improving the dynamic response speed of the motor and reducing energy consumption. The evenly distributed weight-reducing grooves 22 avoid vibration problems that may be caused by uneven mass distribution. The setting of connecting ribs 221 reduces weight while maintaining the necessary connection strength in the force transmission path, forming an efficient force flow transmission network. This ensures that there is sufficient structural rigidity and connection stability between the output mounting part 2 and the outer shell body 10, and can reliably withstand the reaction force and bending moment generated by the torque output, preventing deformation due to insufficient rigidity from affecting the motor accuracy.

[0026] A protrusion 4 is provided at the tail of the outer casing 10, with one end of the protrusion 4 protruding from the output mounting portion 2. In this embodiment, the protrusion 4 at the tail of the outer casing 10, with one end protruding outward from the output mounting portion 2, effectively enhances the mechanical strength and impact resistance of the motor tail structure. It increases the cross-sectional modulus of the tail connection area, improves its structural stiffness against complex loads, prevents casing deformation due to external forces, thereby ensuring the stability of the internal stator and rotor air gap and guaranteeing the electromagnetic performance and operating accuracy of the motor. The protruding protrusion 4 can serve as a natural mounting positioning or heat dissipation enhancement structure, facilitating docking and installation with external equipment, and increasing the heat dissipation surface area, thus improving the heat dissipation conditions at the motor tail.

[0027] The mounting rib 21 has a first ramp 212 and a second ramp 213 at both ends, which are inclined from the center of the mounting rib 21 towards both ends. In this embodiment, the first ramp 212 and the second ramp 213 at both ends of the mounting rib 21, which are inclined from the center of the rib towards both ends, form a symmetrical and optimized structure with guiding and stress-dispersing functions. This double-ramp design plays a key guiding role in the installation and connection of the motor casting housing, effectively avoiding assembly interference caused by alignment deviation, and improving installation convenience and assembly efficiency. The slope shape that smoothly transitions from the center to both ends can effectively disperse and transfer the concentrated stress generated during installation along the slope surface, avoiding the sharp concentration of stress at the connection root between the rib and the housing body 10, thereby greatly reducing the risk of cracks or fatigue failure in this area due to stress concentration, and enhancing the load-bearing reliability and long-term durability of the overall structure.

[0028] A threaded sleeve 214 is provided inside the mounting hole 211. In this embodiment, by providing a threaded sleeve 214 inside the mounting hole 211, the reliability, durability, and convenience of the motor housing installation connection are improved. The structure of the threaded sleeve 214 effectively enhances the local compressive strength and wear resistance of the mounting hole 211, enabling it to withstand higher frequency and higher torque bolt tightening and loosening operations. This avoids the stripping, wear, or deformation problems that are prone to occur in the threads of lightweight cast materials such as aluminum alloys, greatly extending the service life of the housing.

[0029] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A casting housing structure for an electric motor, characterized in that: The device includes a housing body integrally cast, the housing body having a cavity, the cavity including a drive mounting part, an output mounting part and a sealing connection part arranged sequentially from the inside to the outside, the housing body having an output mounting part located on the outer periphery of the cavity, the output mounting part having a plurality of mounting ribs on the outer periphery, and one end of each mounting rib having a mounting hole.

2. The motor casting housing structure according to claim 1, characterized in that: The outer casing body is provided with an end cover at the bottom of the drive mounting part. The end cover is a metal end cover and is used for heat dissipation of the motor in the drive mounting part.

3. The motor casting housing structure according to claim 1, characterized in that: A first step is provided between the output mounting part and the drive mounting part, and a second step is provided between the output mounting part and the sealing connection part. Both the first step and the second step are used for mounting bearings.

4. The motor casting housing structure according to claim 1, characterized in that: The output mounting section is provided with an output gear ring, which is integrally cast in the output mounting section and is used to connect the motor output.

5. The motor casting housing structure according to claim 1, characterized in that: The sealing connection part is provided with a mounting groove, which is used to install a retaining ring to fix the bearing.

6. The motor casting housing structure according to claim 5, characterized in that: The mounting slot and the end of the outer shell body are provided with a sealing inner wall for abutting the sealing element.

7. The motor casting housing structure according to claim 1, characterized in that: The output mounting part is provided with a weight reduction groove, and there are multiple weight reduction grooves. The multiple weight reduction grooves are evenly distributed in a ring between the output mounting part and the outer shell body, and a connecting rib is provided between two adjacent weight reduction grooves.

8. The motor casting housing structure according to claim 1, characterized in that: The rear of the outer casing is provided with a protrusion, one end of which protrudes from the output mounting portion.

9. The motor casting housing structure according to claim 1, characterized in that: The two ends of the installation rib are respectively provided with a first slope and a second slope, and the first slope and the second slope are inclined towards the two ends with the center of the installation rib.

10. The motor casting housing structure according to claim 1, characterized in that: A threaded sleeve is provided inside the mounting hole.

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