Direct-drive grinding head motor capable of enhancing rigidity and waterproofness and flexibly converting grinding wheel seat

Abstract

The utility model discloses a direct-drive grinding head motor capable of enhancing rigidity and waterproofness and flexibly converting a grinding wheel seat, which comprises a motor main body, a front cover and a rear cover which are correspondingly arranged at two ends of the motor main body, and a main shaft arranged in the motor main body, and two ends of the main shaft are correspondingly and rotatably connected with the front cover and the rear cover through bearings. A fly water cover is installed on the main shaft at the front end of the front cover, a bearing installed between the main shaft and the front cover is a paired angular contact bearing, a locknut is installed on the main shaft at the front end of the paired angular contact bearing, a grinding sleeve is installed on the main shaft between the locknut and the fly water cover, and a framework oil seal is reversely installed between the grinding sleeve and the inner wall of the front cover. At least one annular drainage groove is formed in the outer wall of the front end of the front cover and the outer wall of the rear end of the fly water cover, and the fly water cover can be rotationally connected to the outer wall of the front end of the annular drainage groove of the front cover in a sleeving mode; according to the utility model, rigidity and stability can be enhanced; the waterproof performance can be improved, and time and energy of customers can be saved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a direct-drive grinding head motor with enhanced rigidity and waterproof performance and flexible interchangeable grinding wheel base. Background Technology

[0002] A grinding head motor, also known as a high-speed grinding head, is a device specifically designed for grinding, drilling, and milling operations. Due to its superior performance, grinding head motors are widely used in modern industrial production. The grinding wheel holder is a crucial component of an edge grinding machine, primarily used for mounting and securing the grinding wheel. The design and quality of the grinding wheel holder directly affect the working efficiency and processing quality of the edge grinding machine. The grinding wheel is a widely used tool in various industrial fields, mainly used for grinding, polishing, and sanding various materials.

[0003] Traditional grinding head motors use deep groove ball bearings inside the front cover. While this ensures axial clearance, the front cover end is the primary load-bearing end. When subjected to high-efficiency, high-load glass grinding, the inherent clearance of the deep groove ball bearings at the motor front makes them more prone to deformation and wear. This results in scratched, unsightly, or even substandard glass. Water can easily enter the front cover of traditional grinding head motors and cannot drain properly, causing motor damage. Currently, grinding head motors with small outer diameter front covers on the market have direct output shafts. After purchasing the motor, customers must have a corresponding grinding wheel holder made to install the grinding wheel. This process not only increases costs for customers and requires high levels of expertise, but also often results in damage to the motor shaft and bearings due to unprofessional reassembly, affecting the final performance and accuracy. Utility Model Content

[0004] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides a direct drive grinding head motor with enhanced rigidity and waterproofness and flexible grinding wheel seat conversion. It can better withstand radial and axial loads, improve the rigidity and stability of the system, improve waterproof performance and avoid liquid deposition, save customers' time and effort, and ensure that the final use effect of the product reaches the best state.

[0005] A direct-drive grinding head motor with enhanced rigidity, waterproofing, and flexible grinding wheel mount conversion includes a motor body, a front cover and a rear cover correspondingly mounted at both ends of the motor body, and a main shaft installed inside the motor body. The two ends of the main shaft are rotatably connected to the front cover and the rear cover via bearings. A squeegee cover is installed on the main shaft at the front end of the front cover. The bearing between the main shaft and the front cover is a paired angular contact bearing. An anti-loosening nut is installed on the main shaft at the front end of the paired angular contact bearing. A grinding sleeve is installed on the main shaft between the anti-loosening nut and the squeegee cover. A skeleton oil seal is installed in reverse between the grinding sleeve and the inner wall of the front cover. The front outer wall of the front cover and the squeegee cover... At least one annular drainage groove is opened on the outer wall of the rear end. The squeegee cover is rotatably fitted onto the outer wall of the annular drainage groove located at the front end of the front cover. A sealing groove is opened on the inner wall of the front end of the squeegee cover. An O-ring is installed between the sealing groove and the main shaft. A pressure cap hole is opened on the front end face of the squeegee cover. A front pressure cap is fixed in the pressure cap hole with fasteners. A grinding wheel seat is fitted onto the front end of the main shaft. Multiple grinding wheel anti-slip holes are opened on the front end face of the grinding wheel seat. A flat keyway is opened on the inner wall of the grinding wheel seat. A flat key is installed on the outer wall of the front end of the main shaft. The flat key is inserted into the flat keyway. A threaded hole is opened on the front end of the main shaft.

[0006] In some embodiments, the front end of the spindle extends axially outside the grinding wheel seat and is used to fit the grinding wheel.

[0007] In some embodiments, a grinding wheel positioning hole is provided axially at the center of the front end of the grinding wheel seat, the front end of the main shaft is located in the grinding wheel positioning hole, and a skeleton oil seal is mounted upside down on the main shaft located in the grinding wheel positioning hole.

[0008] In some embodiments, a plurality of regularly distributed limiting holes are provided on the outer wall of the grinding wheel seat.

[0009] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0011] Figure 1 This is a three-dimensional structural diagram of one type of grinding wheel holder installed in this application;

[0012] Figure 2 yes Figure 1 A schematic diagram of the side structure;

[0013] Figure 3 yes Figure 2 Sectional view at point A in the middle;

[0014] Figure 4This is a three-dimensional structural diagram of the installation of another type of grinding wheel holder in this application;

[0015] Figure 5 yes Figure 4 Schematic diagram of the split structure of the main view at point B;

[0016] Figure 6 yes Figure 4 Schematic diagram of the rear view split structure at point B.

[0017] Figure label:

[0018] Motor body 1, front cover 2, rotation clearance 260, rear cover 3;

[0019] 4. Main spindle, 400 flat key, 401 threaded hole, 5 bearings;

[0020] 6. Flush cover, 600. Sealing groove, 601.

[0021] 7. Anti-loosening nut; 8. Grinding sleeve;

[0022] 9. Skeleton oil seal; 900 flat end face; 901 circular groove;

[0023] 10. Annular drainage groove, 11. O-ring, 12. Fastener, 13. Front pressure cap;

[0024] Grinding wheel base 14, grinding wheel anti-slip hole 140, flat keyway 141, grinding wheel positioning hole 142

[0025] Limiting hole 143. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Reference Figures 1-6A direct-drive grinding head motor with enhanced rigidity, waterproofing, and flexible grinding wheel mount conversion includes a motor body 1, a front cover 2 and a rear cover 3 correspondingly installed at both ends of the motor body 1, and a main shaft 4 installed inside the motor body 1. The two ends of the main shaft 4 are rotatably connected to the front cover 2 and the rear cover 3 via bearings 5. A water-repellent cover 6 is installed on the main shaft 4 at the front end of the front cover 2. The water-repellent cover 6 is a device used to protect the motor from moisture and dust intrusion; it is typically installed at the front end of the motor and works in conjunction with the front cover 2. The bearings 5 ​​installed between the main shaft 4 and the front cover 2 are paired angular contact bearings, and anti-loosening nuts are installed on the main shaft 4 at the front end of the paired angular contact bearings. 7. A grinding sleeve 8 is installed on the main shaft 4 between the anti-loosening nut 7 and the fly cover 6. A skeleton oil seal 9 is installed in reverse between the grinding sleeve 8 and the inner wall of the front cover 2. The reverse installation means that the end with the flat end face 900 faces the fly cover 6, and the end with the circular groove 901 faces the anti-loosening nut 7. This prevents liquid from remaining in the circular groove 901 and improves the waterproof performance. At least one annular drainage groove 10 is opened on the front outer wall of the front cover 2 and the rear outer wall of the fly cover 6, preferably two or more. This prevents liquid from flowing into the gap between the front cover 2 and the fly cover 6 and improves the waterproof performance. The fly cover 6 is rotatably sleeved on the annular drainage groove located on the front cover 2. A circular sealing groove 600 is formed on the outer wall of the front end of the groove 10 and on the inner wall of the front end of the fly cover 6. An O-ring 11 is tightly installed between the sealing groove 600 and the main shaft 4. A pressure cap hole 601 is formed on the front end face of the fly cover 6. A front pressure cap 13 is fixed in the pressure cap hole 601 with a fastener 12. The front pressure cap 13 presses the O-ring 11 tightly to prevent liquid from entering. A grinding wheel seat 14 is sleeved on the front end of the main shaft 4. A plurality of evenly distributed grinding wheel anti-slip holes 140 are formed on the front end face of the grinding wheel seat 14. Screws can be installed in two opposing 180-degree grinding wheel anti-slip holes 140, and the screw heads are inserted into the pre-set grooves on the grinding wheel. To prevent the grinding wheel from slipping, the grinding wheel and the grinding wheel seat 14 are fitted together face to face. Then, fasteners are screwed through the grinding wheel into the threaded hole 401 located at the front end of the spindle 4, so that the three are tightly fitted and fixed together. A flat keyway 141 is provided on the inner wall of the grinding wheel seat 14. A flat key 400 is installed on the outer wall of the front end of the spindle 4. The flat key 400 is inserted into the flat keyway 141 to prevent the grinding wheel seat 14 from slipping. A threaded hole 401 is provided at the front end of the spindle 4. It is a blind hole. After fasteners are screwed into the threaded hole 401, the grinding wheel, the grinding wheel seat 14, the spindle 4 and other components are fastened together. The fasteners can be screws, bolts or other threaded connectors.

[0031] This application features innovative improvements to the original design, specifically adding two different lengths of grinding wheel holders 14 as optional accessories to meet more diverse application needs. It can output a 14mm shaft length with a grinding wheel holder 14 for mounting thin grinding wheels; or it can output a 40mm diameter recessed hole with a grinding wheel holder 14 for mounting thick grinding wheels. This better adapts to the various functions required by users in different usage scenarios, increasing product compatibility. Pre-assembling the grinding wheels before shipment facilitates control of precision and dynamic balance, avoiding potential precision deficiencies caused by secondary assembly by the customer. This pre-processing effectively avoids the risk of human-caused damage during secondary assembly after receiving the product, and also eliminates precision deficiencies due to improper assembly. Therefore, when customers receive the motor with the grinding wheel holder 14 already assembled, they can immediately put it into use without any cumbersome assembly operations. This not only saves customers time and effort but also ensures that the final product performance reaches its optimal state. Secondly, the original front bearing inside the motor was a deep groove ball bearing, but this application uses a paired angular contact bearing, which is a type of bearing composed of two or more single-row angular contact ball bearings. This design can better withstand radial and axial loads and improve the rigidity and stability of the system. The radial runout of the front fixed end of the main shaft 4 is reduced or eliminated in the source structural design, ensuring axial concentricity during assembly. The rigidity of the motor is further enhanced within the original outer diameter and length dimensions. The annular drainage grooves 10 on the front outer wall of the front cover 2 and the rear outer wall of the fly liner 6 reduce the inflow of liquid into the rotational gap 260 between the front cover 2 and the fly liner 6. A skeleton oil seal 9 is installed between the grinding sleeve and the inner wall of the front cover 2, preventing cooling water and other liquids that have breached the fly liner 6 from flowing towards the bearing and coil end. Furthermore, the liquid can flow out through the rotational gap 260 between the front cover 2 and the fly liner 6 to the outside of the machine, preventing it from accumulating inside the motor and protecting the bearings and coils inside the motor.

[0032] In some embodiments, the front end of the spindle 4 extends axially out of the grinding wheel seat 14, and the spindle 4 extending out of the grinding wheel seat 14 is used to fit the grinding wheel. In use, the grinding wheel is fitted onto the spindle 4, and screws are installed in two opposing 180-degree anti-slip holes 140 on the grinding wheel seat 14. The screw heads are inserted into the pre-set recesses or through holes on the grinding wheel to prevent the grinding wheel from slipping. After the grinding wheel and the grinding wheel seat 14 are in surface-to-surface contact, fasteners are passed through the grinding wheel and screwed into the threaded hole 401 located at the front end of the spindle 4, so that the three are tightly attached and fixed together.

[0033] In some embodiments, a grinding wheel positioning hole 142 is provided axially at the center of the front end of the grinding wheel seat 14. The front end of the main shaft 4 is located in the grinding wheel positioning hole 142. A skeleton oil seal 9 is mounted upside down on the main shaft 4 located in the grinding wheel positioning hole 142. A hollow convex ring located at the center of the rear end of the grinding wheel is inserted into the grinding wheel positioning hole 142. The rear end of the hollow convex ring abuts against the front end face of the skeleton oil seal 9. Screws are installed in two opposing 180-degree anti-slip holes 140 on the grinding wheel seat 14. The screw heads are inserted into the pre-set concave holes or through holes on the grinding wheel to prevent the grinding wheel from slipping. After the grinding wheel and the grinding wheel seat 14 are in surface-to-surface contact, fasteners are passed through the grinding wheel and screwed into the threaded hole 401 located at the front end of the main shaft 4, so that the three are tightly attached and fixed together.

[0034] In some embodiments, a plurality of regularly distributed limiting holes 143 are provided on the outer wall of the grinding wheel seat 14, preferably three evenly distributed; when it is necessary to disassemble the fastener installed in the threaded hole 401, a metal rod or a T-shaped wrench or other gripping device can be inserted into the limiting hole 143 to fix the gripping device, which can prevent the grinding wheel seat 14 from rotating, thereby facilitating disassembly.

[0035] 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 have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered 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 direct drive grinding head motor with enhanced rigidity, waterproofness and flexible conversion of grinding wheel seat, comprising a motor body, a front cover and a rear cover corresponding mounted at both ends of the motor body, a main shaft mounted in the motor body, both ends of the main shaft corresponding rotatably connected with the front cover and the rear cover through bearings, and a water flying cover mounted on the front end of the main shaft, characterized in that: The bearing installed between the main shaft and the front cover is a pair of angular contact bearings, a lock nut is installed on the front end of the main shaft of the pair of angular contact bearings, a bushing is installed on the main shaft between the lock nut and the water outlet cover, a skeleton oil seal is reversely installed between the bushing and the inner wall of the front cover, at least one annular liquid discharge groove is opened on the front end outer wall of the front cover and the rear end outer wall of the water outlet cover, the water outlet cover is rotatably sleeved on the outer wall at the front end of the annular liquid discharge groove of the front cover, a sealing groove is opened on the front end inner wall of the water outlet cover, an O-ring is installed between the sealing groove and the main shaft, a gland hole is opened on the front end face of the water outlet cover, and a front gland is fixed in the gland hole by a fastener.

2. The direct drive grinding head motor for reinforcing rigidity, waterproofness and flexible conversion of the grinding wheel seat according to claim 1, characterized in that: The front end of the main shaft protrudes axially outside the grinding wheel seat, which is used for sleeving the grinding wheel.

3. The direct drive grinding head motor for reinforcing rigidity, waterproofness and flexible conversion of the grinding wheel seat as claimed in claim 1, wherein A grinding wheel positioning hole is axially opened in the middle of the front end of the grinding wheel seat, the front end of the main shaft is located in the grinding wheel positioning hole, and a skeleton oil seal is reversely installed on the main shaft located in the grinding wheel positioning hole.

4. The direct drive grinding head motor for reinforcing rigidity, waterproofness and flexible conversion of the grinding wheel seat according to any one of claims 1 to 3, characterized in that: A plurality of regularly distributed limiting holes are opened on the outer wall of the grinding wheel seat.

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