Compact grinding head motor

Abstract

The utility model discloses a compact grinding head motor, which comprises a motor main body, a front cover, a rear cover, a fly water cover, a main shaft, fan blades and a fan cover, and the height size of the motor main body is larger than the width size; the front cover and the rear cover are respectively fixed at the front end and the rear end of the motor main body; the fly water cover sleeves the front end of the front cover; the main shaft penetrates through the motor main body, the front end is connected with the fly water cover, the rear end is connected with the fan blades, and the fan blades are located in the containing cavity of the rear cover; longitudinal parallel cooling fins are arranged at the upper end and the lower end of the motor body, and a cooling groove is formed between every two adjacent cooling fins. The rear cover walls of the upper end and the lower end of the rear cover are each provided with at least two axially-through kidney-shaped exhaust outlets. The fan cover is fixed to the rear end of the rear cover and axially provided with a conical air guide pipe, and an air inlet is provided with a mesh plate. The utility model has the advantages of reasonable aspect ratio, convenience for side-by-side installation of a plurality of motors, improvement of space utilization rate, and good heat dissipation and waterproof performance.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a compact grinding head motor. Background Technology

[0002] A grinding head motor is a specialized electric motor used to drive grinding tools (such as grinding wheels and grinding heads). It is widely used in machining, precision manufacturing, mold repair, and other fields. A grinding head motor is a high-speed rotating motor that connects directly to the grinding tool or via a transmission mechanism, providing stable speed and torque to achieve material removal, polishing, or precision machining.

[0003] Existing grinding head motors suffer from some or all of the following shortcomings: 1. Structural design flaws leading to low space utilization: Traditional motors are designed using conventional theories, resulting in redundant height and width dimensions. When multiple units are placed side-by-side, they occupy a large lateral space, and the length of the equipment cannot be compressed, leading to a bulky, rigid, and costly machine. There is a lack of compact structure and optimized heat dissipation, and the motor width is not specifically designed for high-density installation scenarios. 2. Failures in heat dissipation and waterproofing design: The straight-cylinder squeegee has defects: insufficient centrifugal force results in low cooling water ejection efficiency, making it easy for water to enter the interior; after the water flow breaks through the frame oil seal, the rubber hardens and fails, causing water ingress, impurity deposition, jamming, and burn-out failures. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides a compact grinding head motor. The main body of the motor is a cuboid with a reasonable height-to-width ratio, which facilitates the side-by-side installation of multiple motors, improves space utilization, and has good heat dissipation and waterproof performance.

[0005] A compact grinding head motor includes a motor body, a front cover, a rear cover, a sprue cover, a main shaft, a fan blade, and a fan shroud. The height of the motor body is greater than its width. The front and rear covers are fixed to the front and rear ends of the motor body, respectively, and the sprue cover is fitted onto the front end of the front cover. The main shaft passes through the motor body, connecting its front end to the sprue cover and its rear end to the fan blade, which is located within the cavity of the rear cover. The upper and lower ends of the motor body are provided with longitudinally parallel heat sinks, forming heat dissipation grooves between adjacent heat sinks. At least two axially penetrating, waist-shaped exhaust ports are opened on the rear cover walls at both the upper and lower ends of the rear cover. The fan shroud is fixed to the rear end of the rear cover and has an axially arranged conical air guide pipe with a perforated plate at the air inlet. The inner wall of the sprue cover mating with the front cover has a gradually expanding flared opening to improve the efficiency of liquid centrifugal sludge removal. The fan blade and the sprue cover can rotate synchronously with the main shaft. When the fan blade rotates, air is drawn in from the conical air guide pipe and then blown onto the heat sinks and heat dissipation grooves through the exhaust ports.

[0006] In some embodiments, the width-to-height ratio of the motor body is 1:1.5-1:1.8; the depth of the heat sink is 50%-70% of the height of the heat sink; the length-to-width ratio of the exhaust port is 3:1-5:1; the cone angle of the tapered air duct is 15°-25°; the aperture of the mesh plate is ≤2mm; and the cone angle of the flared mouth is 20°-30°.

[0007] In some embodiments, a wire clamping plate is also included, which is fixed to the top of the motor body by bolts. The width of the wire clamping plate does not exceed 30% of the width of the motor body. The left and right sides of the motor body are curved, and the top is provided with a lifting hole.

[0008] In some embodiments, a first-stage fluororubber oil seal with a Shore hardness of 70±5 is provided between the squeegee cap and the end face of the front cover; a second-stage hydrogenated nitrile rubber oil seal with a Shore hardness of 80±5 and a temperature resistance range of -40℃ to 150℃ is provided between the inner wall of the front cover and the outer wall of the main shaft.

[0009] In some embodiments, the axial distance between the air inlet end face of the conical air guide duct and the tip of the fan blade is 5%-8% of the impeller diameter, and the perforation rate of the mesh plate is 60%-70%.

[0010] In some embodiments, the surface of the heat sink of the motor body is provided with a nano-alumina coating, the coating thickness is 20-50μm, and the thermal conductivity is ≥30 W / (m·K).

[0011] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of this invention. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings.

[0013] Figure 1 This is a three-dimensional structural diagram of this application;

[0014] Figure 2 This is a top view of the structure of this application;

[0015] Figure 3 This is a schematic diagram of the rear view structure of this application;

[0016] Figure 4 This is a cross-sectional structural diagram of this application;

[0017] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0018] Figure 6 This is a schematic diagram of the three-dimensional structure of the wind shield;

[0019] Figure 7 This is a schematic diagram of the disassembled structure of the wind shield.

[0020] Reference numerals in the attached drawings: 1. Motor body; 11. Lifting hole; 12. Heat sink; 13. Heat sink groove; 2. Front cover; 3. Rear cover; 31. Cavity; 32. Exhaust vent; 4. Water spray cover; 41. Trumpet mouth; 5. Main shaft; 6. Fan blade; 7. Fan cover; 71. Conical air guide pipe; 72. Mesh plate; 8. Wire clamp; 9. First-stage fluororubber oil seal; 10. Second-stage hydrogenated nitrile rubber oil seal. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Reference Figures 1-7A compact grinding head motor includes a motor body 1, a front cover 2, a rear cover 3, a squeegee cover 4, a main shaft 5, a fan blade 6, and a fan shroud 7. The motor body 1 has a rectangular parallelepiped structure, with its height dimension greater than its width dimension, and a lifting hole 11 on the top. The front cover 2 and the rear cover 3 are respectively fixed to the front and rear ends of the motor body 1, and the squeegee cover 4 is fitted onto the front end of the front cover 2. The main shaft 5 passes through the motor body 1, with its front end connected to the squeegee cover 4 and its rear end connected to the fan blade 6, which is located within the cavity 31 of the rear cover 3. The upper and lower ends of the motor body 1 are provided with longitudinally parallel heat sinks 1. 2. A heat dissipation groove 13 is formed between adjacent heat sinks 12; at least two axially penetrating waist-shaped exhaust ports 32 are opened on the upper and lower ends of the rear cover 3; the fan cover 7 is fixed to the rear end of the rear cover 3, and a tapered air guide pipe 71 is provided on its axial side, and a mesh plate 72 is provided at the air inlet; the inner wall of the end of the fly cover 4 that mates with the front cover 2 is provided with a gradually expanding flared mouth 41 to improve the efficiency of liquid centrifugal detachment; the fan blade 6 and the fly cover 4 can rotate synchronously with the main shaft 5. When the fan blade rotates, air is drawn in from the tapered air guide pipe 71 and then blown to the heat sink 12 and the heat dissipation groove 13 through the exhaust port 32.

[0026] I. Working Principle: 1. Power Transmission Path: The main shaft 5 is driven by the motor body 1, synchronously driving the squeegee 4 and the fan blade 6 to rotate, forming a dual-function power output. Front end: The flared opening 41 of the squeegee 4 uses centrifugal force to throw off coolant or cutting fluid, achieving dynamic waterproofing; Rear end: The fan blade 6 generates axial airflow in the cavity 31, forcibly cooling the motor body 1. 2. Heat Dissipation Circulation System: Air intake: External air is accelerated through the conical air guide duct 71 and filtered through the mesh plate 72; Airflow guidance: After being pressurized by the fan blade 6, the airflow is directed from the waist-shaped exhaust port 32 to the heat sink 12 and the heat dissipation groove 13 for heat dissipation. 3. Waterproof Sealing Mechanism: Multi-level protection: First level: Centrifugal water throwing of the flared opening 41 improves the efficiency of liquid throwing; Second level: Double blocking by the media corrosion resistant fluororubber oil seal 9 and the high temperature resistant hydrogenated nitrile rubber oil seal 10.

[0027] II. Achieved Technical Effects: 1. Space Efficiency: The cuboid design compresses the lateral dimensions, facilitating side-by-side installation of multiple machines; the integrated junction box and mounting hole 11 at the top simplify wiring, reducing the overall size of the equipment. 2. Breakthrough in Heat Dissipation Performance: The forced air cooling system extends continuous working life; the directional airflow design and the waist-shaped structure of the exhaust vent 32 improve airflow coverage and enhance heat dissipation efficiency. 3. Reliability: Improved waterproof rating and vibration resistance. 4. Energy Efficiency Optimization: Low wind resistance design, with the combination of a tapered air duct 71 and a perforated plate 72, reduces wind pressure loss. 5. Integrated Functions: Waterproofing (fly cover), heat dissipation (fan blades), and structural support (arc-shaped shell) are integrated into a single compact module. In summary, this application eliminates the need for heat sinks 12 and exhaust vents 32 on the left and right sides of the motor body 1. By raising the center of the magnetic circuit and optimizing the stator winding arrangement, the size of the grinding head motor is compressed to an extremely narrow width, effectively improving the machine's space utilization and allowing for the integration of more grinding head motors into the equipment.

[0028] In some embodiments, the width-to-height ratio of the motor body 1 is 1:1.5-1:1.8, which is suitable for high-density installation, and the spacing between multiple units side by side can be ≤5mm; the depth of the heat dissipation groove 13 is 50%-70% of the height of the heat dissipation fin, balancing airflow resistance and heat dissipation area; the length-to-width ratio of the exhaust port is 3:1-5:1, which guides the airflow and improves the airflow coverage; the cone angle of the tapered air duct 71 is 15°-25°, which reduces wind pressure loss by 20% and increases air volume by 25%; the aperture of the mesh plate 72 is ≤2mm, which improves the dust filtration efficiency by 60% and maintains an opening rate of 70% without clogging; the cone angle of the horn mouth 41 is 20°-30°, which improves the centrifugal water-throwing efficiency by 40% and enhances the waterproof rating.

[0029] In some embodiments, a wire clamping plate 8 is also included, which is fixed to the top of the motor body 1 by bolts. The width of the wire clamping plate 8 does not exceed 30% of the width of the motor body 1 to avoid lateral expansion, maintain the overall compactness of the motor, and adapt to narrow installation scenarios. The left and right sides of the motor body 1 are curved surfaces, and the top is provided with a lifting hole 11.

[0030] In some embodiments, a first-stage fluororubber oil seal 9 with a Shore hardness of 70±5 is provided between the end face of the squeegee cover 4 and the front cover 2; a second-stage hydrogenated nitrile rubber oil seal 10 with a Shore hardness of 80±5 and a temperature resistance range of -40℃ to 150℃ is provided between the inner wall of the front cover 2 and the outer wall of the main shaft 5; the sealing reliability is improved, the service life is extended under high-speed rotation, and both elastic sealing and wear resistance are taken into account.

[0031] In some embodiments, the axial distance between the air inlet end face of the conical air guide duct 71 and the tip of the fan blade 6 is 5%-8% of the impeller diameter, which avoids airflow turbulence loss, increases air volume, ensures uniform airflow intake of the fan blade 6, and reduces noise.

[0032] In some embodiments, the surface of the heat sink 12 of the motor body 1 is provided with a nano-alumina coating with a thermal conductivity ≥30 W / (m·K), which improves heat transfer efficiency and quickly dissipates heat from inside the motor; the coating thickness is 20-50μm, which balances thermal conductivity and mechanical strength and prevents the coating from peeling off.

[0033] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compact grinding head motor, comprising a motor body (1), a front cover (2), a rear cover (3), a water spray cover (4), a main shaft (5), a fan blade (6), and a fan shroud (7), characterized in that: The height dimension of the motor body (1) is greater than its width dimension; The front cover (2) and the rear cover (3) are respectively fixed to the front and rear ends of the motor body (1), and the water spray cover (4) is sleeved on the front end of the front cover (2); The main shaft (5) passes through the motor body (1), with its front end connected to the water spray cover (4) and its rear end connected to the fan blade (6). The fan blade (6) is located in the cavity (31) of the rear cover (3). The motor body (1) has longitudinally parallel heat sinks (12) at both the upper and lower ends, and heat sink grooves (13) are formed between adjacent heat sinks (12); At least two axially penetrating waist-shaped exhaust vents (32) are opened on the upper and lower ends of the rear cover (3); The wind cover (7) is fixed to the rear end of the rear cover (3), and has a tapered air guide pipe (71) in its axial direction and a mesh plate (72) at the air inlet; The inner wall of the fitting end of the water spray cover (4) and the front cover (2) is provided with a gradually expanding flared mouth (41) to improve the efficiency of liquid centrifugal detachment; The fan blade (6) and the water cover (4) can rotate synchronously with the main shaft (5). When the fan blade rotates, the air is drawn in from the conical air guide pipe (71) and then blown to the heat sink (12) and heat sink (13) through the exhaust port (32).

2. The compact grinding head motor as described in claim 1, characterized in that: The width-to-height ratio of the motor body (1) is 1:1.5-1:1.8; the depth of the heat sink (13) is 50%-70% of the height of the heat sink; the length-to-width ratio of the exhaust port is 3:1-5:1; the cone angle of the tapered air duct (71) is 15°-25°; the aperture of the perforated plate (72) is ≤2mm, and the opening rate of the perforated plate (72) is 60%-70%; the cone angle of the flared mouth (41) is 20°-30°.

3. The compact grinding head motor as described in claim 1 or 2, characterized in that: It also includes a wire clamping plate (8), which is fixed to the top of the motor body (1) by bolts. The width of the wire clamping plate (8) does not exceed 30% of the width of the motor body (1). The left and right sides of the motor body (1) are curved, and the top is provided with a hoisting hole (11).

4. The compact grinding head motor as described in claim 3, characterized in that: A first-stage fluororubber oil seal (9) with a Shore hardness of 70±5 is provided between the end face of the squeegee cover (4) and the front cover (2); a second-stage hydrogenated nitrile rubber oil seal (10) with a Shore hardness of 80±5 and a temperature resistance range of -40℃ to 150℃ is provided between the inner wall of the front cover (2) and the outer wall of the main shaft (5).

5. The compact grinding head motor as described in claim 4, characterized in that: The axial distance between the air inlet end face of the conical air guide pipe (71) and the tip of the fan blade (6) is 5%-8% of the impeller diameter.

6. The compact grinding head motor as described in claim 4, characterized in that: The surface of the heat sink (12) of the motor body (1) is provided with a nano-alumina coating with a thickness of 20-50μm and a thermal conductivity of ≥30W / (m·K).

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