Composite grinding wheel driving motor

Abstract

The utility model discloses a composite grinding wheel driving motor, which comprises a motor main body, a front cover, a rear cover, a fan cover arranged at the rear end of the rear cover, a spline shaft penetrating along the axial direction, a main shaft arranged in the spline shaft, and an outer grinding wheel assembly and an inner grinding wheel assembly which are correspondingly arranged at the front ends of the spline shaft and the main shaft, a framework oil seal is fixed between an outer grinding wheel seat of the outer grinding wheel assembly and the main shaft through a clamping spring, and O-shaped sealing rings are installed between the outer grinding wheel seat and an inner grinding wheel seat and between an outer grinding wheel and an inner grinding wheel. A linear bearing and a sliding sleeve are correspondingly arranged between the spline shaft and the two ends of the main shaft in a sleeved mode, and the main shaft and the spline shaft can rotate synchronously and can conduct axial feeding. A rear bearing sleeve, a rear bearing gland fastened with the rear bearing sleeve side by side and a rear bearing mounted in the rear bearing sleeve are mounted in the fan cover, and the rear end of the main shaft is rotationally connected with the rear bearing; the utility model can quickly replace and improve the efficiency, and has the advantages of good sealing protection and stable structure.

Description

Technical Field

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

[0002] Grinding wheel drive motors are electric motors specifically designed to drive grinding wheels (such as grinding wheels, grinding discs, etc.) for grinding, polishing, or cutting operations. They are widely used in industrial manufacturing, construction, metal processing, and other fields.

[0003] Currently, most grinding wheel motors on the market are single-output shafts with a single grinding wheel for end and radial surface grinding, or multi-grinding wheel radial surface grinding. The sealing systems mostly use single-layer protection, which is prone to failure in dusty and humid environments, and the low utilization rate of mating surfaces leads to premature wear. To ensure workpieces meet dimensional and brightness standards, edge grinding machines often need to increase the number of grinding head motors. This not only significantly increases manufacturing costs but also results in bulky and cumbersome equipment, with obvious shortcomings in economic efficiency and space utilization. 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 composite grinding wheel drive motor, which adopts an independent and detachable end face dual-output dual grinding wheel structure, which can quickly replace and improve efficiency; it has good sealing and protection, effectively blocking the intrusion of external pollutants; it has good torsional performance and a stable structure.

[0005] A composite grinding wheel drive motor includes a motor body, which includes a front cover, a rear cover, a fan shroud installed at the rear end of the rear cover, a splined shaft extending axially, and a main shaft installed inside the splined shaft. An outer grinding wheel assembly and an inner grinding wheel assembly are correspondingly installed at the front ends of the splined shaft and the main shaft. A skeleton oil seal is fixed between the outer grinding wheel seat of the outer grinding wheel assembly and the main shaft by a snap ring. O-rings are installed between the outer grinding wheel seat and the inner grinding wheel seat, and between the outer grinding wheel and the inner grinding wheel. Linear shafts are correspondingly sleeved between the two ends of the splined shaft and the main shaft. The main shaft can rotate synchronously with the spline shaft and can also be fed axially. The fan cover contains a rear bearing sleeve, a rear bearing cover that is fastened to the rear bearing sleeve, and a rear bearing installed in the rear bearing sleeve. The rear end of the main shaft is rotatably connected to the rear bearing. An anti-loosening nut is installed at the rear end of the main shaft. A rotation space is formed between the anti-loosening nut and the rear bearing cover. A long strip-shaped positioning guide hole is opened on the fan cover. A positioning guide is inserted into the positioning guide hole. One end of the positioning guide is fixed to the rear bearing cover.

[0006] In some embodiments, multiple ball-head plungers are installed radially and regularly between the outer grinding wheel seat and the inner grinding wheel seat, and between the air shroud and the rear bearing sleeve, which can be used to adjust concentricity.

[0007] In some embodiments, the outer grinding wheel seat is sleeved on the front end of the splined shaft, and the outer grinding wheel seat and the end face of the splined shaft are connected and limited by multiple cylindrical pins; the inner grinding wheel seat is sleeved with the front tapered surface of the main shaft, and the front end of the main shaft is threaded with an end face nut to fasten the inner grinding wheel seat.

[0008] In some embodiments, the end face of the outer grinding wheel and the outer grinding wheel seat, and the end face of the inner grinding wheel and the inner grinding wheel seat are detachably connected by a plurality of regularly distributed hexagonal socket screws, and the end face of the inner grinding wheel and the spindle are also detachably connected by a hexagonal socket screw.

[0009] 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

[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 frontal three-dimensional structural schematic diagram of this application;

[0012] Figure 2 This is a rear-view stereoscopic structural diagram of this application;

[0013] Figure 3 This is a cross-sectional structural diagram of this application;

[0014] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0015] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0016] Figure label:

[0017] Motor body, front cover 2, rear cover 3;

[0018] 4. Wind cover; 400 positioning guide hole; 401 positioning guide component;

[0019] Splined shaft 5, main spindle 6;

[0020] External grinding wheel assembly 7, external grinding wheel seat 700, external grinding wheel 701;

[0021] Inner grinding wheel assembly 8, inner grinding wheel seat 800, inner grinding wheel 801;

[0022] 9. Snap ring, 10. Oil seal, 11. O-ring, 12. Linear bearing, [unclear - possibly a component name]

[0023] 13. Rear bearing sleeve; 14. Rear bearing gland; 15. Rear bearing; 16. Anti-loosening screw.

[0024] 17. Female, ball-head plunger; 18. Cylindrical pin; 19. End nut; 20. Internal hex screw.

[0025] Silk 21. Detailed Implementation

[0026] 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.

[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 1-5A composite grinding wheel drive motor includes a motor body 1, which includes a front cover 2, a rear cover 3, a fan shroud 4 installed at the rear end of the rear cover 3, a splined shaft 5 extending axially, and a main shaft 6 coaxially installed within the splined shaft 5. The inner wall of the splined shaft 5 is machined with axially extending involute splines, which precisely mesh with corresponding keyways on the outer periphery of the main shaft 6. The side contact surfaces of the splined teeth and keyways generate shear force during rotation, achieving power transmission and synchronous rotation. The axial clearance of the splined teeth allows the main shaft 6 to slide along the axis within the splined shaft 5, meeting feed requirements. Both ends of the splined shaft 5 extend to the outside of the front cover 2 and the rear cover 3, respectively, and both ends of the main shaft 6 extend from the ends of the splined shaft 5, respectively. An outer grinding wheel assembly 7 and an inner grinding wheel assembly 8 are respectively installed at the front ends of the splined shaft 5 and the main shaft 6. A skeleton oil seal 10 is fixed between the outer grinding wheel seat 700 of the outer grinding wheel assembly 7 and the main shaft 6 via a snap ring 9. The outer grinding wheel seat 700 and the inner grinding wheel seat 800 are connected by a frame oil seal 10. O-ring seals 11 are installed between wheel 701 and inner grinding wheel 801, and the two are arranged side by side. Linear bearings 12 and sliding sleeves 13 are respectively fitted between the two ends of spline shaft 5 and main shaft 6. The sliding sleeves 13 are copper sleeves. The main shaft 6 can rotate synchronously with spline shaft 5 and can also be fed axially. A rear bearing sleeve 14, a rear bearing cover 15 fastened to the rear bearing sleeve 14 by multiple screws in parallel, and a rear bearing 16 installed in the rear bearing sleeve 14 are installed inside the fan cover 4. The rear end of the main shaft 6 is rotatably connected to the rear bearing 16. An anti-loosening nut 17 is installed at the rear end of the main shaft 6. An annular rotation space is formed between the anti-loosening nut 17 and the rear bearing cover 15. Two symmetrically arranged elongated positioning guide holes 400 are opened on the fan cover 4. A positioning guide 401 is inserted into the positioning guide hole 400. One end of the positioning guide 401 is fixed to the rear bearing cover 15. The positioning guide 401 can be a screw, bolt or bolt, etc.

[0031] This application adopts a modular, split-type grinding wheel design, featuring an independently detachable dual-output dual-grinding wheel module. The inner grinding wheel 801 can be equipped with a high-precision polishing unit for mirror finishing, while the outer grinding wheel 701 can be configured with a diamond grinding array to achieve cutting edge shaping. It employs a modular quick-release design, breaking through the complex assembly logic of traditional dual-output shaft motors and optimizing the installation structure to a sequential arrangement of bearings → waterproof components → grinding wheel components. This eliminates the need to disassemble the rear telescopic drive component, enabling rapid replacement of easily worn front-end parts and significantly improving maintenance efficiency. The front end uses a linear bearing 12 instead of the traditional graphite copper guide sleeve, featuring low friction and low energy consumption, significantly improving operational accuracy and stability, extending service life, and reducing maintenance costs. Excellent noise and vibration control; a "1+1" O-ring seal 11 layout is adopted between the outer grinding wheel assembly 7 and the inner grinding wheel assembly 8: the inner ring achieves precise positioning, and the outer ring forms a dynamic seal; the outer grinding wheel seat 700 is equipped with a snap ring 9 to fix the skeleton oil seal 10 in the middle hole, and the inner output shaft maintains protection within the sliding space during reciprocating motion within the oil seal, effectively preventing the intrusion of external pollutants; a highly concentric connection interface is reserved at the rear end of the fan cover 4 for connecting the axial drive power source device, which facilitates the axial feed of the spindle 6; while maintaining output performance, this application significantly improves the durability, maintenance convenience and environmental adaptability of the equipment, and is particularly suitable for precision grinding that requires frequent parameter adjustment or operation in high dust environments.

[0032] In some embodiments, a plurality of ball-head plungers 18 are radially and uniformly installed between the outer grinding wheel seat 700 and the inner grinding wheel seat 800, and between the air shroud 4 and the rear bearing sleeve 14, which can be used to adjust concentricity. The ball-head plunger 18 includes a plunger body, a spring installed in one end of the plunger body, and a ball head. Using the ball-head plunger 18 can realize dynamic concentricity adjustment, reduce contact surface wear while ensuring guiding accuracy, extend component life, reduce maintenance frequency, and significantly improve equipment operation stability.

[0033] In some embodiments, the outer grinding wheel seat 700 is sleeved on the front end of the splined shaft 5, and the outer grinding wheel seat 700 and the end face of the splined shaft 5 are connected and limited by a plurality of cylindrical pins 19; the inner grinding wheel seat 800 is sleeved with the front tapered surface of the main shaft 6, and the front end of the main shaft 6 is threaded with an end face nut 20 to fasten the inner grinding wheel seat 800 to the tapered part of the main shaft 6.

[0034] The design adopts a cylindrical pin with 19 end face limiting, which can realize power transmission through pin hole cooperation and achieve axial assembly and disassembly freedom. This solution eliminates the need for special tools during disassembly and assembly, and common tools can be used to complete the separation and repositioning of components. The utilization rate of mating surfaces is improved, ensuring the dual optimization of sealing performance and transmission efficiency.

[0035] In some embodiments, the end face of the outer grinding wheel 701 and the outer grinding wheel seat 700, and the end face of the inner grinding wheel 801 and the inner grinding wheel seat 800, are detachably connected by multiple evenly distributed hexagon socket screws 21. The end face of the inner grinding wheel 801 and the main shaft 6 are also detachably connected by a hexagon socket screw 21. The size of the front bearing and the outer diameter of the neck can also be increased simultaneously. The front bearing is sleeved between the front cover 2 and the spline shaft 5, and a bearing is also installed between the rear cover 3 and the spline shaft 5, forming a more stable support system, which greatly improves the overall torsional resistance of the motor and strengthens the structural rigidity.

[0036] I. Working Principle:

[0037] (1) Power transmission and synchronous rotation: The splined shaft 5 and the main shaft 6 achieve power transmission through the precise meshing of involute spline teeth and keyways. During rotation, the side of the spline teeth and the contact surface of the keyway generate shear force to ensure synchronous rotation, while allowing the main shaft 6 to slide axially within the splined shaft 5 to meet the feed requirements; the motor body extends from both ends of the splined shaft 5, driving the outer grinding wheel assembly 7 and the inner grinding wheel assembly 8 to rotate synchronously, realizing the collaborative operation of the two grinding wheels.

[0038] (2) Axial feed and sliding control: The linear bearing 12 and the copper sliding sleeve 13 support the spindle 6, so that it can slide smoothly along the axis when rotating, adapting to the feed motion during the grinding process; the axial clearance design of the spline avoids jamming caused by rigid connection and ensures dynamic adjustment accuracy.

[0039] (3) Sealing and dust prevention: The skeleton oil seal 10 and O-ring 11 prevent coolant and wear debris from entering the bearing and transmission components, thus extending their service life; the fan cover 4 supports the rear end of the main shaft through the rear bearing sleeve 14, the pressure cover 15 and the rear bearing 16, and the anti-loosening nut 17 locks the axial position to prevent loosening.

[0040] (4) Positioning and guidance: The elongated positioning guide hole 400 on the wind cover 4 cooperates with the guide 401 fixed to the rear bearing cover 15 to restrict the circumferential rotation of the rear bearing cover 15, ensuring that the main shaft moves only along the axial direction and avoiding sway.

[0041] II. Technical Effects:

[0042] (1) High-precision power transmission: Involute spline meshing provides high torque transmission efficiency and minimal synchronization error, making it suitable for precision grinding scenarios; Axial sliding and rotation decoupling design avoids vibration problems of traditional couplings.

[0043] (2) Composite grinding function: The outer grinding wheel 701 and the inner grinding wheel 801 are set up to complete the machining of inner and outer diameters at the same time, improving efficiency (such as composite machining of bearing rings, gears and other workpieces); the sealing structure (oil seal + O-ring) ensures long-term stability in the grinding fluid environment.

[0044] (3) Dynamic adaptability: The linear bearing 12 and the copper sleeve 13 reduce sliding friction, and the spindle 6 has a fast feed response and low wear; the cooperation between the positioning guide hole 400 and the positioning guide 401 prevents the spindle from deflecting and ensures the straightness of the feed trajectory.

[0045] (4) Maintainability and reliability: Modular design (such as detachable fan cover 4 and rear bearing cover 15) facilitates bearing maintenance; anti-loosening nut 17 and rear bearing cover 15 form a rotation space to avoid excessive axial preload causing bearing damage.

[0046] 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 composite grinding wheel drive motor, comprising a motor body, including a front cover, a rear cover, a fan shroud mounted at the rear end of the rear cover, a splined shaft extending axially, and a main shaft mounted within the splined shaft, wherein an outer grinding wheel assembly and an inner grinding wheel assembly are correspondingly mounted at the front ends of the splined shaft and the main shaft, characterized in that: The outer grinding wheel assembly has a skeleton oil seal fixed between the outer grinding wheel seat and the main shaft via a snap ring. O-rings are installed between the outer grinding wheel seat and the inner grinding wheel seat, and between the outer grinding wheel and the inner grinding wheel. Linear bearings and sliding sleeves are fitted between the two ends of the spline shaft and the main shaft, allowing the main shaft to rotate synchronously with the spline shaft and also to feed axially. The fan shroud contains a rear bearing sleeve, a rear bearing cover fastened to the rear bearing sleeve, and a rear bearing installed inside the rear bearing sleeve. The rear end of the main shaft is rotatably connected to the rear bearing. An anti-loosening nut is installed at the rear end of the main shaft, and a rotation space is formed between the anti-loosening nut and the rear bearing cover. An elongated positioning guide hole is provided on the fan shroud, and a positioning guide is inserted into the positioning guide hole. One end of the positioning guide is fixed to the rear bearing cover.

2. The composite grinding wheel drive motor as described in claim 1, characterized in that: Multiple ball-head plungers are installed radially and regularly between the outer grinding wheel seat and the inner grinding wheel seat, and between the air shroud and the rear bearing sleeve, which can be used to adjust concentricity.

3. The composite grinding wheel drive motor as described in claim 2, characterized in that: The outer grinding wheel seat is sleeved on the front end of the splined shaft, and the outer grinding wheel seat and the end face of the splined shaft are connected and limited by multiple cylindrical pins; the inner grinding wheel seat is sleeved with the front tapered surface of the main shaft, and the front end of the main shaft is threaded with an end face nut to fasten the inner grinding wheel seat.

4. The composite grinding wheel drive motor as described in claim 3, characterized in that: The outer grinding wheel and the end face of the outer grinding wheel seat, and the inner grinding wheel and the end face of the inner grinding wheel seat are detachably connected by multiple regularly distributed hexagonal screws. The inner grinding wheel and the end face of the spindle are also detachably connected by a hexagonal screw.

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