Automatic motor structure for polishing and grinding shoe sole

Abstract

The utility model discloses a kind of shoe sole polishing automatic motor structure, it includes rotation angle bearing seat, rotary pneumatic air film, polishing wheel motor, belt, polishing wheel, grinding wheel spindle, main shaft box and mounting plate. Rotation angle bearing seat is realized polishing wheel angle dynamic adjustment, contact pressure is controlled in combination with rotary pneumatic air film, ensure that shoe sole surface treatment uniformity;High-strength belt and high-hardness polishing wheel optimize power transmission efficiency and wear resistance performance;Main shaft box and mounting plate enhance overall stability and reduce operating noise. The application can significantly improve the quality and efficiency of shoe sole polishing, adapt to the needs of a variety of materials, provide reliable technical support for modern shoe production line.

Description

Technical Field

[0001] This utility model relates to the technical field of automated equipment for footwear production, and in particular to an automatic motor structure for grinding and polishing shoe soles. Background Technology

[0002] Shoe sole grinding and polishing is a crucial step in the shoe manufacturing process. Its purpose is to achieve a smooth and flat surface on the sole through mechanical processing, thereby improving the product's appearance and performance. Traditional shoe sole grinding and polishing equipment typically relies on manual operation or simple mechanized devices, which are significantly insufficient in terms of efficiency and precision. Especially when dealing with complex curved soles, traditional equipment often struggles to ensure uniform contact between the polishing wheel and the sole surface, leading to unsatisfactory grinding results or even localized excessive wear. Furthermore, existing equipment lacks flexibility during operation, failing to automatically adjust the angle and position of the polishing wheel according to changes in the sole shape, further limiting its applicability and processing quality.

[0003] While some current technologies incorporate motor drives and lever principles to improve the movement trajectory of the polishing wheel, several technical bottlenecks remain. For example, the polishing wheel's running path is not uniform, easily leading to inconsistent surface treatment of shoe soles due to uneven force distribution. Furthermore, existing power transmission systems often use belt drives, whose stability and durability may be affected under high-intensity operating conditions. Additionally, the design of key components such as the spindle box and mounting plate fails to adequately consider the overall coordination of the equipment, resulting in complex structures and high maintenance costs. These problems not only reduce production efficiency but also increase the need for manual intervention, making it difficult to meet the demands of the modern footwear industry for highly efficient and automated production.

[0004] Therefore, developing an automatic motor structure for shoe sole grinding and polishing that can achieve uniform movement of the polishing wheel, flexibly adapt to changes in shoe sole shape, and possess high stability has become a pressing technical challenge. This structure requires optimizing the design of key components such as the rotation angle bearing housing, pneumatic air film, and power transmission system to improve the processing accuracy and operational reliability of the equipment, providing a more efficient and intelligent solution for the footwear industry. Utility Model Content

[0005] The purpose of this utility model is to provide an automatic motor structure for shoe sole grinding and polishing, which solves the problems mentioned in the background art.

[0006] This utility model is implemented as follows: an automatic motor structure for shoe sole grinding and polishing includes a rotating angle bearing seat, a rotating pneumatic film, a grinding wheel motor, a belt, a grinding wheel, a grinding wheel spindle, a spindle box, and a mounting plate. Wherein:

[0007] The rotating angle bearing housing, located at the top of the device, is a core component for adjusting the grinding wheel angle. Its design is based on the lever principle, combined with a motor drive to achieve dynamic angle adjustment. Furthermore, the rotating angle bearing housing, through its built-in high-precision bearings and adjustable linkage mechanism, enables continuous angle changes of the grinding wheel within a horizontal to inclined range, adapting to shoe sole surfaces with different curvatures. In particular, the bearing housing also integrates a pneumatic air film auxiliary module, which reduces the frictional resistance of the grinding wheel during movement through the elastic support characteristics of the air film, thereby improving the sensitivity and stability of angle adjustment.

[0008] Furthermore, the rotary pneumatic air film is positioned below the rotation angle bearing seat to precisely control the contact pressure between the grinding wheel and the sole. The rotary pneumatic air film employs a multi-chamber structure, with each chamber independently inflated and its pressure value monitored in real time by a pressure sensor to ensure uniform pressure distribution. Specifically, the air film surface is equipped with a microporous array, releasing minute amounts of gas onto the sole surface to create an air cushion effect, reducing the occurrence of localized overpressure. In addition, the air pressure range of the air film chambers is 0.2 MPa to 0.8 MPa, allowing for segmented adjustment based on the hardness of the sole material to meet the grinding needs of different sole materials.

[0009] The grinding wheel motor is installed inside the spindle box, serving as the power source for the entire device. Its output shaft is connected to a belt via a coupling, transmitting rotational power to the grinding wheel spindle. Furthermore, the grinding wheel motor is a brushless DC motor with a rated speed range of 1500 rpm to 3000 rpm, featuring high torque density and low vibration characteristics, suitable for long-term continuous operation. Notably, the motor integrates a temperature sensor and a current detection module, using a closed-loop control system to adjust the output power in real time, preventing equipment damage due to overload.

[0010] Furthermore, the belt is made of high-strength polyurethane material, with an embedded steel wire reinforcement layer on its inner side to improve tensile strength and wear resistance. The belt width is 20mm to 50mm, and the thickness is 3mm to 8mm, with the specific dimensions matched according to the motor power and transmission ratio. Specifically, both ends of the belt engage with the motor output shaft and the grinding wheel spindle via toothed interfaces to ensure no slippage occurs during power transmission. In addition, the belt tension can be finely adjusted via external adjusting bolts to maintain optimal transmission efficiency.

[0011] The grinding wheel is located at the bottom of the device and directly contacts the sole surface to perform grinding and polishing operations. The grinding wheel is composed of high-hardness silicon carbide particles and an epoxy resin matrix, with a surface roughness ranging from Ra 0.8μm to Ra 3.2μm. Different grit configurations can be selected according to the sole material. Furthermore, the grinding wheel is fixed to the grinding wheel spindle via a threaded connection for easy and quick replacement. Notably, the outer edge of the grinding wheel has a rounded chamfer structure to reduce edge stress concentration and extend its service life.

[0012] Furthermore, the grinding wheel spindle is supported inside the spindle box by rolling bearings. The spindle diameter is 15mm to 30mm, and the length is 100mm to 200mm, with the specific dimensions designed according to the grinding wheel specifications. The spindle surface undergoes high-frequency quenching treatment, achieving a hardness of HRC 60 or higher, providing excellent wear resistance. Notably, the spindle and grinding wheel employ a tapered mating structure, with a locking nut applying preload to ensure coaxiality during high-speed rotation.

[0013] The spindle box, as the core load-bearing component of the transmission system, is formed using an aluminum alloy casting process, with a wall thickness of 5mm to 10mm and internal reinforcing ribs to improve structural rigidity. Furthermore, a sealing cover is provided on the top of the spindle box to prevent dust from entering and affecting the normal operation of the transmission components. Notably, the bottom of the spindle box is connected to the mounting plate via shock-absorbing pads, effectively isolating the device from external vibrations.

[0014] The mounting plate is made of stamped steel plate with a thickness of 10mm to 20mm, and its surface is sandblasted and then coated with an anti-rust coating. Furthermore, the mounting plate has positioning holes around its perimeter for connection to fixed supports on the production line. Notably, the central area of ​​the mounting plate has a counterweight mounting groove; by adjusting the number of counterweights, the overall center of gravity of the device is balanced, ensuring stability during operation.

[0015] The working principle of this utility model is as follows:

[0016] S1: Adjust the angle of the grinding wheel by rotating the angle bearing seat to match the curvature of the sole surface; S2: Activate the rotating pneumatic air film, set the target air pressure value according to the sole material, and adjust the contact pressure between the grinding wheel and the sole;

[0017] S3: After the grinding wheel motor is powered on, the power is transmitted to the grinding wheel spindle through the belt, which drives the grinding wheel to rotate at high speed;

[0018] S4: The grinding wheel moves along a preset track on the sole surface to complete the grinding and polishing operation.

[0019] The technical advantages of this utility model are as follows:

[0020] By utilizing the synergistic effect of the rotating angle bearing seat and the rotating pneumatic film, precise control of the grinding wheel angle and pressure is achieved, resulting in a more uniform surface treatment of the shoe sole. Furthermore, the combination of a high-strength belt and a high-hardness grinding wheel improves power transmission efficiency and wear resistance, reducing maintenance frequency. In particular, the optimized design of the spindle box and mounting plate enhances the overall stability of the device and reduces operating noise. In summary, this invention not only improves the quality and efficiency of shoe sole grinding and polishing but also possesses wide applicability and good economic efficiency, providing reliable technical support for modern footwear production lines. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a detailed structural diagram of the present invention.

[0023] The attached diagram is labeled as follows: 1. Rotary angle bearing housing; 2. Rotary pneumatic air film; 3. Grinding wheel motor; 4. Belt; 5. Grinding wheel; 6. Grinding wheel spindle; 7. Spindle box; 8. Mounting plate. Detailed Implementation

[0024] This utility model relates to an automatic motor structure for shoe sole grinding and polishing, and its specific implementation method is described in conjunction with the attached diagram. Figure 1 To be continued Figure 2 Please provide a detailed explanation. For example... Figure 1 As shown, the device includes a rotating angle bearing seat 1, a rotating pneumatic air film 2, a grinding wheel motor 3, a belt 4, a grinding wheel 5, a grinding wheel spindle 6, a spindle box 7, and a mounting plate 8. These components, through precise design and assembly, work together to achieve efficient and uniform grinding and polishing of the shoe sole surface.

[0025] The rotating angle bearing seat 1, located at the top of the device, is one of the core adjustment components of the entire structure. It houses a high-precision rolling bearing and an adjustable linkage mechanism for dynamically adjusting the angle of the grinding wheel 5. In actual operation, through a motor-driven lever principle, the rotating angle bearing seat 1 can flexibly adjust the posture of the grinding wheel 5 according to changes in the curvature of the shoe sole. The specific implementation process is as follows: First, the operator inputs the target angle parameters according to the shape of the shoe sole. The control system drives the linkage mechanism via a built-in servo motor, causing the rotating angle bearing seat 1 to rotate, thereby changing the tilt angle of the grinding wheel 5. Furthermore, the rotating angle bearing seat 1 also integrates a pneumatic air film auxiliary module. The elastic support characteristics of the air film significantly reduce the frictional resistance experienced by the grinding wheel 5 during movement, further improving the sensitivity and stability of angle adjustment. In practical applications, this module injects compressed air into the air film chamber through a micro-air pump, forming a stable air cushion effect to ensure that the grinding wheel 5 can operate smoothly at different angles.

[0026] The rotary pneumatic air film 2 is located below the rotary angle bearing seat 1, and its main function is to precisely control the contact pressure between the grinding wheel 5 and the sole. The rotary pneumatic air film 2 adopts a multi-chamber structure design, with each chamber independently inflated and the air pressure value monitored in real time by a pressure sensor, thereby ensuring uniform pressure distribution. Specifically, when the grinding wheel 5 needs to process a harder sole material, a higher air pressure value, such as 0.6MPa to 0.8MPa, can be set through the control system; while for softer sole materials, the air pressure value can be adjusted to 0.2MPa to 0.4MPa. Furthermore, the surface of the rotary pneumatic air film 2 has a microporous array, which releases a small amount of gas during operation to form an air cushion effect, reducing the occurrence of localized overpressure. This design not only improves the adhesion between the grinding wheel 5 and the sole surface but also effectively avoids excessive wear or poor polishing caused by uneven pressure.

[0027] The grinding wheel motor 3 is installed inside the spindle box 7, serving as the power source for the entire device. Its output shaft is connected to the belt 4 via a coupling, transmitting rotational power to the grinding wheel spindle 6. In practice, the grinding wheel motor 3 is a brushless DC motor with a rated speed range of 1500 rpm to 3000 rpm, featuring high torque density and low vibration characteristics, suitable for long-term continuous operation. To ensure the reliability of motor operation, it integrates a temperature sensor and a current detection module, using a closed-loop control system to monitor the motor's operating status in real time and dynamically adjust the output power. For example, when excessive motor load is detected, the control system automatically reduces the output power to prevent overload damage to the equipment. Furthermore, the starting and stopping processes of the grinding wheel motor 3 employ soft-start technology, gradually increasing or decreasing the current to reduce starting shock and extend motor lifespan.

[0028] Belt 4 is made of high-strength polyurethane material, with an inner steel wire reinforcement layer to improve tensile strength and wear resistance. In practical applications, the width and thickness of belt 4 are matched according to the motor power and transmission ratio, typically ranging from 20mm to 50mm in width and 3mm to 8mm in thickness. Both ends of belt 4 mesh with the output shaft of the grinding wheel motor 3 and the grinding wheel spindle 6 via toothed interfaces, ensuring no slippage during power transmission. To maintain optimal transmission efficiency, the tension of belt 4 can be finely adjusted using an external adjusting bolt. The specific operating steps are as follows: First, loosen the adjusting bolt using a torque wrench; then, adjust the tension of belt 4 according to actual needs; finally, retighten the bolt to complete the adjustment. This design not only facilitates maintenance but also effectively avoids power loss due to belt slack.

[0029] The grinding wheel 5 is located at the bottom of the device and directly contacts the sole surface to perform grinding and polishing operations. The grinding wheel 5 is composed of high-hardness silicon carbide particles and an epoxy resin matrix, with a surface roughness ranging from Ra 0.8μm to Ra 3.2μm. Different grit configurations can be selected according to the sole material. For example, a coarse-grit grinding wheel with a surface roughness of Ra 3.2μm can be used for rubber soles, while a fine-grit grinding wheel with a surface roughness of Ra 0.8μm can be used for PU soles. The grinding wheel 5 is fixed to the grinding wheel spindle 6 via a threaded connection for easy and quick replacement. Furthermore, the outer edge of the grinding wheel 5 has a rounded chamfer structure to reduce edge stress concentration and extend its service life. In actual operation, when the grinding wheel 5 wears to a certain extent, the operator only needs to use a special tool to disassemble it and replace it with a new grinding wheel to restore the normal operation of the device.

[0030] The grinding wheel spindle 6 is supported inside the spindle box 7 by rolling bearings. Its diameter and length are designed according to the specifications of the grinding wheel 5, typically ranging from 15mm to 30mm in diameter and 100mm to 200mm in length. The surface of the spindle 6 undergoes high-frequency quenching treatment, achieving a hardness of HRC 60 or higher, providing excellent wear resistance. To ensure coaxiality during high-speed rotation, the spindle 6 and grinding wheel 5 employ a tapered fit structure, with preload applied via a lock nut. During actual assembly, the operator must use a torque wrench to tighten the lock nut to the specified torque value to ensure a tight connection between the spindle 6 and grinding wheel 5. Furthermore, the rolling bearings of the spindle 6 are double-row angular contact ball bearings, capable of simultaneously withstanding radial and axial loads, further enhancing operational stability.

[0031] The spindle box 7, as the core load-bearing component of the transmission system, is formed using aluminum alloy casting technology, with a wall thickness of 5mm to 10mm and internal reinforcing ribs to improve structural rigidity. In practical applications, the top of the spindle box 7 is equipped with a sealing cover to prevent dust from entering and affecting the normal operation of the transmission components. Furthermore, the bottom of the spindle box 7 is connected to the mounting plate 8 via vibration damping pads, effectively isolating the device from external vibrations. The vibration damping pads are made of high-molecular polymer materials, possessing excellent elasticity and damping characteristics, providing stable vibration isolation in high-frequency vibration environments. During assembly, operators must ensure the vibration damping pads are accurately positioned and symmetrically arranged to avoid structural deformation caused by uneven stress.

[0032] Mounting plate 8 is made of stamped steel plate with a thickness of 10mm to 20mm. The surface is sandblasted and then coated with an anti-rust coating. Mounting plate 8 has positioning holes around its perimeter for connection to fixed supports on the production line. During actual installation, operators must use high-strength bolts to secure mounting plate 8 to the production line and adjust the bolt tightness to ensure the device's levelness and stability. Furthermore, mounting plate 8 has a counterweight mounting slot in its central area, allowing for adjustment of the number of counterweights to balance the device's center of gravity. For example, if the device's center of gravity shifts, the number of counterweights can be increased or decreased in the mounting slot until the ideal balance is achieved. This design not only improves the device's operational stability but also effectively reduces operating noise.

[0033] The working principle of this invention is as follows: S1 The angle of the grinding wheel 5 is adjusted by rotating the angle bearing seat 1 to match the curvature of the sole surface; S2 The rotating pneumatic air film 2 is activated, and the target air pressure value is set according to the sole material to adjust the contact pressure between the grinding wheel 5 and the sole; S3 After the grinding wheel motor 3 is powered on, the power is transmitted to the grinding wheel spindle 6 through the belt 4, driving the grinding wheel 5 to rotate at high speed; S4 The grinding wheel 5 moves along a preset trajectory on the sole surface to complete the grinding and polishing operations. In practical applications, this device can be widely used in modern footwear production lines, significantly improving the quality and efficiency of sole surface treatment, while also possessing wide applicability and good economic efficiency.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic motor structure for shoe sole grinding and polishing, characterized in that, The device includes a rotating angle bearing seat (1), a rotating pneumatic air film (2), a grinding wheel motor (3), a belt (4), a grinding wheel (5), a grinding wheel spindle (6), a spindle box (7), and a mounting plate (8). The rotating angle bearing seat (1) is located at the top of the device and is used to adjust the angle of the grinding wheel (5). The rotating pneumatic air film (2) is located below the rotating angle bearing seat (1) and is used to control the contact pressure between the grinding wheel (5) and the sole of the shoe. The grinding wheel motor (3) is installed inside the spindle box (7) and transmits power to the grinding wheel spindle (6) through the belt (4). The grinding wheel (5) is fixed on the grinding wheel spindle (6). The spindle box (7) is connected to the mounting plate (8) through a shock-absorbing pad.

2. The automatic motor structure for shoe sole grinding and polishing as described in claim 1, characterized in that... The rotating angle bearing seat (1) is equipped with a high-precision rolling bearing and an adjustable linkage mechanism to adjust the angle of the grinding wheel (5) according to the curvature of the shoe sole.

3. The automatic motor structure for shoe sole grinding and polishing as described in claim 2, characterized in that... The rotating angle bearing housing (1) integrates a pneumatic air film auxiliary module, which reduces the frictional resistance of the grinding wheel (5) during movement by utilizing the elastic support characteristics of the air film.

4. The automatic motor structure for shoe sole grinding and polishing as described in claim 1, characterized in that... The rotating pneumatic air membrane (2) adopts a multi-chamber structure. Each chamber is independently inflated and the air pressure value is monitored in real time by a pressure sensor. The air pressure range is 0.2MPa to 0.8MPa.

5. The automatic motor structure for shoe sole grinding and polishing as described in claim 4, characterized in that... The surface of the rotating pneumatic air film (2) is provided with a micropore array to release a small amount of gas to form an air cushion effect and reduce the occurrence of local overpressure.

6. The automatic motor structure for shoe sole grinding and polishing as described in claim 1, characterized in that... The belt (4) is made of high-strength polyurethane material, with a steel wire reinforcement layer embedded on the inside. The width is 20mm to 50mm and the thickness is 3mm to 8mm. Both ends are meshed with the output shaft of the grinding wheel motor (3) and the grinding wheel spindle (6) through toothed interfaces.

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