Foot mounting speed reducer motor shell hole polishing device

Abstract

The application relates to the technical field of motor production, in particular to a bottom foot mounting speed reducer motor shell inner hole polishing device, which comprises a machining table, a grinding wheel spindle, a driving motor, a wheel core and a grinding wheel sleeve. The grinding wheel spindle is rotatably arranged on the machining table, the driving motor drives the grinding wheel spindle to rotate, and the wheel core is coaxially and rotationally connected to the end of the grinding wheel spindle. The bottom foot mounting speed reducer motor shell inner hole polishing device can automatically distribute the gravity centers of the wheel core and the grinding wheel sleeve according to the different states of pre-starting and normal polishing of the grinding wheel sleeve, effectively reduces the starting energy consumption of the equipment, and improves the rotation stability of the wheel core and the grinding wheel sleeve; meanwhile, the design of the wheel core and the grinding wheel spindle in the mode of a small amount of relative rotation and dead linkage not only guarantees the smooth adjustment of the gravity center, but also ensures the stable transmission of power in the polishing stage, guarantees the high-precision polishing requirement of the bottom foot mounting speed reducer motor shell inner hole, the device can be manufactured and put into use, can produce positive effects, and has practicality.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, specifically to a grinding device for the inner hole of a base-mounted geared motor housing. Background Technology

[0002] Foot-mounted geared motors are commonly used power transmission devices in industrial production. Their housings, as core load-bearing components, have internal bores for mounting bearings and gears. The machining accuracy of these bores directly affects the assembly quality and operational stability of the geared motor. Currently, in the production and processing of foot-mounted geared motor housings, the internal bore grinding process is mostly completed using traditional grinding equipment. However, existing grinding devices generally have many technical defects and are difficult to adapt to the processing requirements of foot-mounted geared motor housings.

[0003] The existing grinding wheel structure of most grinding devices is designed with a fixed counterweight, which cannot adjust the center of gravity distribution according to the change of grinding speed. This results in excessive load when the equipment starts up, which not only increases the energy consumption of the drive motor, but also easily causes problems such as start-up jamming and increased vibration, affecting the service life of the equipment.

[0004] Furthermore, existing grinding devices often use grinding wheels that are directly linked to the drive mechanism. Once started, the grinding wheel rotates at high speed. When the grinding wheel contacts the workpiece, there is a lack of effective safety buffering mechanisms. The high-speed rotating wheel is prone to colliding with the workpiece, causing scratches on the workpiece's inner hole and damage to the grinding wheel. This not only increases the scrap rate but also poses certain safety hazards. Some devices attempt to achieve delayed grinding wheel start using electronic control components, but the electronic control structure is complex, has a high failure rate, and high maintenance costs, making it unsuitable for industrial mass production scenarios.

[0005] In view of this, we propose a grinding device for the inner hole of the geared motor housing that is mounted on the base. Summary of the Invention

[0006] The purpose of this invention is to provide a grinding device for the inner hole of a foot-mounted geared motor housing, thereby solving the problems of high starting energy consumption, significant safety hazards, and cumbersome adjustment in existing foot-mounted geared motor housing grinding devices mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a grinding device for the inner hole of a foot-mounted geared motor housing, comprising a processing table, a grinding wheel spindle, a drive motor, a wheel core, and a grinding wheel sleeve.

[0007] The grinding wheel spindle is rotatably mounted on the processing table. The drive motor drives the grinding wheel spindle to rotate. The wheel core is coaxially rotatably connected to the end of the grinding wheel spindle. The wheel core can only rotate slightly relative to the grinding wheel spindle to accommodate the small displacement during the center of gravity adjustment stage. After the center of gravity adjustment is completed, the grinding wheel spindle and the wheel core are in a locked linkage state and rotate synchronously. The grinding wheel sleeve is rotatably mounted on the outside of the wheel core.

[0008] The wheel core has an internal weight adjustment cavity. The end of the grinding wheel spindle away from the drive motor extends through the wheel core into the weight adjustment cavity and is fixedly connected to the main gear. The weight adjustment cavity has three radially evenly arranged grooves along the circumference. A slide seat is slidably arranged in each groove. A secondary gear that meshes with the main gear is rotatably arranged on the slide seat. A top spring is arranged in the groove. One end of the top spring is fixedly connected to the end of the groove away from the center of the weight adjustment cavity, and the other end is fixedly connected to the slide seat. A foldable and unfoldable counterweight column is rotatably connected to the secondary gear.

[0009] The grinding wheel sleeve is fixedly provided with a toothed sleeve with teeth on the inner wall. A toothed ring is vertically slidably provided inside the toothed sleeve and meshes with the toothed sleeve. A stud coaxial with the wheel core is fixedly provided at the end of the wheel core away from the grinding wheel spindle. The inner hole of the toothed ring is provided with internal thread and is threadedly connected to the stud. A coil spring is provided between the wheel core and the grinding wheel sleeve.

[0010] Preferably, the top spring is always in a compressed state, applying a thrust to the slide block pointing towards the center of the weight adjustment cavity, ensuring stable meshing between the auxiliary gear and the main gear during the pre-start phase of the grinding wheel, and driving the counterweight column to fold to the center of the weight adjustment cavity.

[0011] Preferably, the end face of the secondary gear is rotatably connected to an L-shaped bracket, and the counterweight column is fixed to the end of the bracket away from the secondary gear.

[0012] When the centrifugal force of the wheel core reaches the grinding speed, the centrifugal force overcomes the elastic force of the top spring and drives the sliding seat to move, causing the auxiliary gear to disengage from the main gear, and the counterweight column to be thrown into the unfolded state and to fit against the inner wall of the weight adjustment cavity.

[0013] Preferably, the inner bottom wall of the weight adjustment cavity is uniformly fixed with three baffles along the circumference. The three baffles correspond one-to-one with the three sliding grooves, and a limiting area is formed between two adjacent baffles. The counterweight column is correspondingly set in the limiting area.

[0014] Preferably, the outer wall teeth of the toothed ring are matched with the inner wall teeth of the toothed sleeve, and the rotation of the toothed ring is restricted by the meshing of the teeth, allowing the toothed ring to slide vertically along the toothed sleeve only.

[0015] Preferably, the toothed sleeve is fixedly installed inside the grinding wheel sleeve by bolts, and the inner wall teeth of the toothed sleeve and the outer wall teeth of the toothed ring are both straight tooth structures.

[0016] Preferably, the stud and the wheel core are integrally formed, and the outer diameter of the stud is adapted to the internal thread of the toothed ring. When the stud rotates, it can drive the toothed ring to slide smoothly vertically until the toothed ring abuts against the inner wall of the grinding wheel sleeve to achieve the interlocking of the grinding wheel sleeve and the wheel core.

[0017] Preferably, one end of the coil spring is welded and fixed to the outer wall of the wheel core, and the other end is welded and fixed to the inner wall of the grinding wheel sleeve. The initial state of the coil spring is a naturally extended state. After the grinding stops, the elastic potential energy is released to drive the grinding wheel sleeve to rotate in the opposite direction and reset, and synchronously drive the toothed ring to slide upward along the stud to release the interlock.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In this invention, the center of gravity of the wheel core and the grinding wheel sleeve can be automatically distributed according to the different states of pre-start and normal grinding of the grinding wheel sleeve, effectively reducing the energy consumption of equipment startup and improving the rotational stability of the wheel core and the grinding wheel sleeve; at the same time, the design of "small relative rotation - locked linkage" between the wheel core and the grinding wheel spindle not only ensures the smooth adjustment of the center of gravity, but also ensures the stable transmission of power during the grinding stage, and ensures the high-precision grinding requirements of the inner hole of the geared motor housing mounted on the foot. This device can be manufactured and put into use, and can produce positive effects, thus possessing practicality.

[0020] In this invention, the safety interlock design of the grinding wheel sleeve provides a safe contact time, avoiding damage to the workpiece and grinding wheel sleeve caused by high-speed collisions, thus improving grinding safety and making it suitable for industrial mass production scenarios. The reset function of the coil spring not only enables the grinding wheel sleeve to automatically reset, but also releases the wheel core from the grinding wheel spindle from the jammed state, facilitating the adjustment for the next start-up, further demonstrating the practicality and inventiveness of this invention.

[0021] In this invention, the counterweight column is limited by three stop bars to ensure that it will not shift during folding and unfolding, thereby improving the accuracy of center of gravity adjustment, avoiding grinding wheel vibration caused by counterweight column shift, ensuring the roundness and surface smoothness of the inner hole grinding, and preventing the counterweight column shift from affecting the linkage effect between the wheel core and the grinding wheel spindle.

[0022] In this invention, a coil spring is used to achieve automatic reset of the grinding wheel sleeve, eliminating the need for manual operation, reducing the amount of manual assistance, extending the service life of the grinding wheel sleeve and wheel core, reducing equipment maintenance costs, and improving processing efficiency; the linkage design between the wheel core and the grinding wheel spindle eliminates the need for an additional power transmission structure, simplifying the overall structure and reducing manufacturing costs. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is an exploded view of the wheel core and grinding wheel sleeve of the present invention;

[0025] Figure 3 This is a bottom view of the three-dimensional structure of the wheel core of the present invention;

[0026] Figure 4 This is a three-dimensional structural cross-sectional view of the wheel core of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6This is a schematic diagram showing the distribution of the support and counterweight column within the adjusting cavity of the present invention;

[0029] Figure 7 This is a schematic diagram showing the distribution of the baffles in the weight adjustment cavity according to the present invention;

[0030] Figure 8 This is an exploded view of the slide, auxiliary gear, bracket, and counterweight column of the present invention.

[0031] Figure 9 For the present invention Figure 8 Enlarged view of point B in the middle.

[0032] In the diagram: 1. Machining table; 2. Grinding wheel spindle; 3. Drive motor; 4. Wheel core; 5. Grinding wheel sleeve; 6. Adjusting chamber; 7. Main gear; 8. Slide groove; 9. Slide seat; 10. Secondary gear; 11. Top spring; 12. Counterweight column; 13. Bracket; 14. Gear sleeve; 15. Gear ring; 16. Stud; 17. Coil spring; 18. Stop bar. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 9 The present invention provides a technical solution: a grinding device for grinding the inner hole of a geared motor housing with a base mounting, including a processing table 1, a grinding wheel spindle 2, a drive motor 3, a wheel core 4, and a grinding wheel sleeve 5.

[0035] The processing table 1 is made of cast iron, which has good stability and avoids vibration during processing.

[0036] The grinding wheel spindle 2 is made of alloy steel and its surface is hardened to improve wear resistance and strength. The grinding wheel spindle 2 is rotatably mounted on the spindle support of the machining table 1 via bearings. The drive motor 3 is connected to the grinding wheel spindle 2 via a coupling to achieve smooth rotation drive of the grinding wheel spindle 2. The wheel core 4 is made of aluminum alloy to reduce the overall weight while ensuring structural strength. The wheel core 4 is coaxially rotatably connected to the end of the grinding wheel spindle 2. The wheel core 4 can only rotate slightly relative to the grinding wheel spindle 2. This slight rotation is only used to accommodate the small displacement during the center of gravity adjustment stage. After the center of gravity adjustment is completed, the wheel core 4 and the grinding wheel spindle 2 are in a locked linkage state and rotate synchronously.

[0037] The wheel core 4 has a cylindrical weight adjustment cavity 6 inside. The inner diameter of the weight adjustment cavity 6 is reasonably designed according to the size of the grinding wheel sleeve 5. The end of the grinding wheel spindle 2 away from the drive motor 3 passes through the through hole of the wheel core 4, extends into the weight adjustment cavity 6, and is welded and fixed to the main gear 7. The main gear 7 rotates synchronously with the grinding wheel spindle 2 and has no fixed connection with the wheel core 4, ensuring that the main gear 7 can rotate freely in the weight adjustment cavity 6 without interfering with the wheel core 4.

[0038] The grinding wheel sleeve 5 is fitted outside the wheel core 4 and can rotate freely relative to the wheel core 4. A coil spring 17 is installed between the wheel core 4 and the grinding wheel sleeve 5. A stud 16 is integrally formed at the end of the wheel core 4 away from the grinding wheel spindle 2. The stud 16 is coaxially arranged with the wheel core 4.

[0039] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the top spring 11 is made of stainless steel and is always in a compressed state, applying a thrust towards the center of the weight adjustment cavity 6 to the slide 9. This ensures that during the pre-start stage of the grinding wheel, the auxiliary gear 10 is stably meshed with the main gear 7 under the thrust of the top spring 11, thereby driving the counterweight column 12 to fold to the center of the weight adjustment cavity 6, reducing the rotational load of the wheel core 4 during equipment startup and preventing startup jamming. The inner top wall of the weight adjustment cavity 6 is uniformly machined with three radial grooves 8 along the circumference. The length of the grooves 8 is designed according to the radius of the weight adjustment cavity 6. A slide 9 is slidably installed in each groove 8. The slide 9 is made of wear-resistant nylon to reduce sliding friction. The auxiliary gear 10 is installed on the slide 9 through a rotating shaft. The auxiliary gear 10 can rotate freely around the rotating shaft. One end of the top spring 11 is welded and fixed to the end of the groove 8, and the other end is welded and fixed to the slide 9, continuously applying a thrust towards the center of the weight adjustment cavity 6 to the slide 9.

[0040] During the pre-start phase, the wheel core 4 can rotate slightly relative to the grinding wheel spindle 2. The auxiliary gear 10 meshes with the main gear 7, causing the counterweight column 12 to fold and reduce the starting load. When the centrifugal force overcomes the elastic force of the top spring 11, the slide 9 displaces, causing the auxiliary gear 10 to disengage from the main gear 7, and the wheel core 4 and the grinding wheel spindle 2 immediately lock and become linked.

[0041] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the end face of the auxiliary gear 10 is rotatably connected to an L-shaped bracket 13 via a rotating shaft. The bracket 13 is made of bent steel plate, and the counterweight column 12 is made of high-density alloy steel and is welded and fixed to the end of the bracket 13 away from the auxiliary gear 10.

[0042] When the centrifugal force of the wheel core 4 reaches the preset grinding speed, the centrifugal force overcomes the elastic force of the top spring 11, causing the slide 9 to move away from the center of the weight adjustment cavity 6 along the slide groove 8, disengaging the auxiliary gear 10 from the main gear 7. At this time, the centrifugal force throws the counterweight column 12 into the unfolded state, and the counterweight column 12 fits tightly against the inner wall of the weight adjustment cavity 6, achieving a locking linkage between the wheel core 4 and the grinding wheel spindle 2. When the counterweight column 12 is folded, the wheel core 4 rotates slightly relative to the grinding wheel spindle 2. After the counterweight column 12 is unfolded, the wheel core 4 locks with the grinding wheel spindle 2, ensuring that the wheel core 4 rotates synchronously with the grinding wheel spindle 2, thus improving the center of gravity adjustment effect.

[0043] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, three baffles 18 are uniformly welded along the circumference of the inner bottom wall of the weight adjustment cavity 6. The three baffles 18 correspond one-to-one with the three sliding grooves 8 in the weight adjustment cavity 6. An arc-shaped limiting area is formed between two adjacent baffles 18. The counterweight column 12 is correspondingly set in this limiting area to ensure that the counterweight column 12 will not shift during folding and unfolding, avoid collision with the inner wall of the weight adjustment cavity 6, and at the same time ensure the accuracy of the center of gravity adjustment, and prevent the counterweight column 12 from shifting and affecting the linkage between the wheel core 4 and the grinding wheel spindle 2.

[0044] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the outer wall of the toothed ring 15 is machined with straight tooth patterns, and the inner wall of the toothed sleeve 14 is machined with straight tooth patterns that match the toothed ring 15. The two are connected by tooth pattern meshing, which restricts the rotation of the toothed ring 15 relative to the toothed sleeve 14, allowing the toothed ring 15 to slide smoothly only in the vertical direction of the toothed sleeve 14, ensuring that the stud 16 can stably drive the toothed ring 15 to move when it rotates. The toothed ring 15 is slidably installed inside the toothed sleeve 14. The inner hole of the toothed ring 15 is machined with internal threads and is threadedly connected to the stud 16. When the stud 16 rotates, it can drive the toothed ring 15 to slide vertically up and down.

[0045] After the wheel core 4 and the grinding wheel spindle 2 are locked together, the stud 16 rotates synchronously with the wheel core 4, driving the gear ring 15 to slide downward and press against the inner wall of the grinding wheel sleeve 5, thereby realizing the interlock between the grinding wheel sleeve 5 and the wheel core 4, and driving the grinding wheel sleeve 5 to rotate synchronously for grinding.

[0046] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the gear sleeve 14 is fixedly installed inside the grinding wheel sleeve 5 by four evenly distributed bolts to ensure that the gear sleeve 14 is firmly installed.

[0047] The inner wall teeth of the toothed sleeve 14 and the outer wall teeth of the toothed ring 15 are both straight tooth structures, which are adapted to the vertical sliding requirements of the toothed ring 15 and improve the stability of the meshing. The toothed sleeve 14 is fixedly installed inside the grinding wheel sleeve 5 by bolts. The inner wall of the toothed sleeve 14 is machined with teeth that match the outer wall teeth of the toothed ring 15. The meshing of the teeth restricts the rotation of the toothed ring 15, allowing the toothed ring 15 to slide vertically along the toothed sleeve 14 only.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the stud 16 and the wheel core 4 are integrally cast using a casting process, and the material is the same aluminum alloy as the wheel core 4. The internal thread of the toothed ring 15 matches the external thread of the stud 16. When the stud 16 rotates, it can drive the toothed ring 15 to slide smoothly vertically until the toothed ring 15 presses against the inner wall of the grinding wheel sleeve 5, thus achieving a reliable interlock between the grinding wheel sleeve 5 and the wheel core 4. The stud 16 and the wheel core 4 are coaxially arranged and rotate synchronously with the wheel core 4, driving the toothed ring 15 to slide and achieve the interlock between the grinding wheel sleeve 5 and the wheel core 4, thereby driving the grinding wheel sleeve 5 to rotate synchronously for grinding.

[0049] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the coil spring 17 is made of stainless steel and is in a naturally extended state in its initial state. One end of the coil spring 17 is welded and fixed to the outer wall of the wheel core 4, and the other end is welded and fixed to the inner wall of the grinding wheel sleeve 5. The welding strength meets the force requirements during the grinding process.

[0050] After grinding stops, the coil spring 17 releases its elastic potential energy, causing the grinding wheel sleeve 5 to rotate in the opposite direction back to its initial position. Simultaneously, it drives the gear ring 15 to slide upwards along the stud 16 to disengage the interlock. At the same time, it releases the wheel core 4 from the jammed state of the grinding wheel spindle 2, restoring it to a state where it can rotate slightly, preparing for the next processing cycle. When the grinding wheel sleeve 5 stops and the wheel core 4 rotates, the coil spring 17 is wound up, storing elastic potential energy to provide power for the machine to stop and reset.

[0051] The method for using the grinding device for the inner hole of the geared motor housing with the base mounted includes the following steps:

[0052] S1. Fix the base mounting gear motor housing onto the positioning fixture of the processing table 1, start the drive motor 3, drive the grinding wheel spindle 2 to rotate, and the grinding wheel spindle 2 drives the main gear 7 to rotate synchronously.

[0053] Due to the thrust of the top spring 11, the auxiliary gear 10 and the main gear 7 remain engaged. At this time, the wheel core 4 can rotate slightly relative to the grinding wheel spindle 2. The main gear 7 drives the auxiliary gear 10 to rotate. The auxiliary gear 10 drives the counterweight column 12 to fold from the edge area of ​​the weight adjustment cavity 6 to a position close to the center of the weight adjustment cavity 6 through the L-shaped bracket 13.

[0054] The rotational load of wheel core 4 is reduced, thus reducing the energy consumption for equipment startup.

[0055] S2. As the speed of the drive motor 3 increases, the centrifugal force of the wheel core 4 gradually reaches the grinding speed. The centrifugal force overcomes the elastic force of the top spring 11, causing the slide block 9 to move away from the center of the weight adjustment cavity 6 along the slide groove 8. The auxiliary gear 10 disengages from the main gear 7.

[0056] At this moment, the centrifugal force throws the counterweight column 12, which is in the center position, into the unfolded state. The counterweight column 12 adheres to the inner wall of the adjusting chamber 6, and the wheel core 4 and the grinding wheel spindle 2 are immediately locked in a linked state, and the two rotate synchronously.

[0057] S3. Move the processing table 1 to align the grinding wheel sleeve 5 with the inner hole of the housing. When the grinding wheel sleeve 5 contacts the workpiece, the workpiece generates resistance to the grinding wheel sleeve 5, causing the grinding wheel sleeve 5 to stop.

[0058] At this time, the wheel core 4 and the stud 16 continue to rotate together with the grinding wheel spindle 2. The rotation of the stud 16 drives the toothed ring 15 to slide down along the toothed sleeve 14 until the toothed ring 15 presses against the inner wall of the grinding wheel sleeve 5. At this time, the grinding wheel sleeve 5 and the wheel core 4 are interlocked and rotate together with the wheel core 4 to perform grinding operations on the inner hole of the housing.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for the inner hole of a geared motor housing, characterized in that, It includes a processing table (1), a grinding wheel spindle (2), a drive motor (3), a wheel core (4), and a grinding wheel sleeve (5); The grinding wheel spindle (2) is rotatably mounted on the processing table (1). The drive motor (3) drives the grinding wheel spindle (2) to rotate. The wheel core (4) is coaxially rotatably connected to the end of the grinding wheel spindle (2). The wheel core (4) can only rotate slightly relative to the grinding wheel spindle (2) to adapt to the small displacement during the center of gravity adjustment stage. After the center of gravity adjustment is completed, the grinding wheel spindle (2) and the wheel core (4) are in a locked linkage state and rotate synchronously. The grinding wheel sleeve (5) is rotatably mounted on the outside of the wheel core (4). The wheel core (4) has an adjustment cavity (6) inside. The end of the grinding wheel spindle (2) away from the drive motor (3) extends through the wheel core (4) into the adjustment cavity (6) and is fixedly connected to the main gear (7). The adjustment cavity (6) has three radially arranged grooves (8) evenly arranged in the circumference. Each groove (8) has a sliding seat (9) slidably arranged in it. A secondary gear (10) meshing with the main gear (7) is rotatably arranged on the sliding seat (9). A top spring (11) is arranged in the groove (8). One end of the top spring (11) is fixedly connected to the end of the groove (8) away from the center of the adjustment cavity (6), and the other end is fixedly connected to the sliding seat (9). A foldable and unfoldable counterweight column (12) is rotatably connected to the secondary gear (10). The grinding wheel sleeve (5) is fixedly provided with a toothed sleeve (14) with teeth on the inner wall. A toothed ring (15) is vertically slidably provided inside the toothed sleeve (14) and meshes with the toothed sleeve (14). A stud (16) coaxial with the wheel core (4) is fixedly provided at the end of the wheel core (4) away from the grinding wheel spindle (2). The inner hole of the toothed ring (15) is provided with an internal thread and is threadedly connected to the stud (16). A coil spring (17) is provided between the wheel core (4) and the grinding wheel sleeve (5).

2. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The top spring (11) is always in a compressed state, applying a thrust to the slide (9) pointing towards the center of the weight adjustment cavity (6), ensuring that the auxiliary gear (10) and the main gear (7) are stably meshed during the pre-start stage of the grinding wheel, and driving the counterweight column (12) to fold to the center of the weight adjustment cavity (6).

3. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The end face of the auxiliary gear (10) is rotatably connected to an L-shaped bracket (13), and the counterweight column (12) is fixed to the end of the bracket (13) away from the auxiliary gear (10). When the centrifugal force of the wheel core (4) reaches the grinding speed, the centrifugal force overcomes the elastic force of the top spring (11) and drives the slide (9) to move, causing the auxiliary gear (10) to disengage from the main gear (7), and the counterweight column (12) is thrown to the unfolded state and fits against the inner wall of the weight adjustment cavity (6).

4. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The inner bottom wall of the weight adjustment cavity (6) is uniformly fixed with three baffles (18) along the circumference. The three baffles (18) correspond one-to-one with the three sliding grooves (8). A limiting area is formed between two adjacent baffles (18), and the counterweight column (12) is correspondingly set in the limiting area.

5. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The outer wall teeth of the toothed ring (15) are matched with the inner wall teeth of the toothed sleeve (14). The toothed ring (15) is restricted from rotating by the meshing of the teeth, and the toothed ring (15) is only allowed to slide vertically along the toothed sleeve (14).

6. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The toothed sleeve (14) is fixedly installed inside the grinding wheel sleeve (5) by bolts. The inner wall teeth of the toothed sleeve (14) and the outer wall teeth of the toothed ring (15) are both straight tooth structures.

7. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: The stud (16) and the wheel core (4) are integrally formed. The outer diameter of the stud (16) is adapted to the internal thread of the toothed ring (15). When the stud (16) rotates, it can drive the toothed ring (15) to slide smoothly vertically until the toothed ring (15) presses against the inner wall of the grinding wheel sleeve (5) to realize the interlocking of the grinding wheel sleeve (5) and the wheel core (4).

8. The grinding device for the inner hole of the base-mounted geared motor housing according to claim 1, characterized in that: One end of the coil spring (17) is welded and fixed to the outer wall of the wheel core (4), and the other end is welded and fixed to the inner wall of the grinding wheel sleeve (5). The initial state of the coil spring (17) is the naturally extended state. After the grinding stops, the elastic potential energy is released to drive the grinding wheel sleeve (5) to rotate in the opposite direction to reset, and synchronously drive the toothed ring (15) to slide upward along the stud (16) to release the interlock.

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