Grinding device for bearing outer ring channel

Abstract

A grinding device for a bearing outer ring channel comprises a workbench, a feeding channel, a discharging channel, a grinding wheel and a rotating mechanism, the feeding channel and the discharging channel are distributed from top to bottom, a material receiving position is arranged between the feeding channel and the discharging channel, a machining position is located on one side of the material receiving position, and a material pulling mechanism is arranged on the other side of the material receiving position. The material pulling mechanism comprises a movable part which is connected with the driving part and can move back and forth between the material receiving position and the machining position, a middle channel which can be connected with the feeding channel and the discharging channel is arranged on the movable part, the middle channel can limit one outer ring in the moving direction of the movable part, and meanwhile a bearing part which is in linkage with the movable part is arranged. During machining, the bearing piece is used for enabling the machined outer ring to fall onto the bearing piece, and when the material pulling mechanism feeds materials to the machining position again, the machined outer ring on the bearing piece falls into the discharging channel. Obviously, the feeding device is simple and reasonable in structure, low in cost, convenient to feed and discharge and high in production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bearing machining, and specifically refers to a grinding device for bearing outer ring channel. BACKGROUND

[0002] A bearing generally comprises an outer ring, an inner ring, a rolling element and a retainer. In order to cooperate with the installation of the rolling element, a channel matched with the rolling element needs to be machined on the inner wall surface of the bearing outer ring (hereinafter referred to as the outer ring for short). The channel is often completed by a numerical control micro bearing outer ring channel grinding machine. During machining, the outer ring is positioned by a limiting piece at the machining position, and then the outer ring is rotated by a rotating mechanism at the machining position. Then the grinding wheel is extended into the outer ring to grind the channel of the outer ring at a certain speed. During the machining process, cooling water is used for flushing to flush away the dust on the surface of the outer ring, and to cool and cool the grinding wheel to a certain extent.

[0003] In the prior art, there are also some low-cost polishing mechanisms, such as the structure disclosed in the document with the Chinese patent authorization announcement number CN220372903U. When in use, the bearing outer ring is placed in the clamping groove, clamped by the clamping plates distributed opposite to each other, the polishing wheel is extended into the groove of the clamping groove and attached to the outer ring channel, the polishing wheel is fixed at the bottom end of the rotating shaft, the top end of the rotating shaft is connected with the output end of the motor, and the motor is started to rotate the polishing wheel for polishing work.

[0004] Although the above-mentioned low-cost polishing device can successfully polish the channel for general bearing outer rings, for large-diameter thin-walled outer rings (usually referred to as thin-walled outer rings), the outer ring at the machining position is easily deformed due to the extrusion of the four clamping plates, which affects the machining quality. In addition, the feeding and discharging are not convenient, and the machining efficiency needs to be further improved. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in the prior art, and provides a grinding device for bearing outer ring channel with low cost and more reasonable structure.

[0006] The utility model discloses a technical scheme that solves the above technical problems, which is a grinding device for bearing outer ring channel, comprising a workbench provided with a processing position, a feeding channel and a discharging channel located on the workbench, a grinding wheel for processing the outer ring channel, a rotating mechanism capable of driving the outer ring at the processing position to rotate, and a limiting piece for positioning the outer ring at the processing position, characterized in that the feeding channel and the discharging channel are arranged from top to bottom, and a receiving position is arranged between the feeding channel and the discharging channel, the processing position is located on one side of the receiving position, and a pulling mechanism is arranged on the other side of the receiving position, the pulling mechanism comprises a movable piece connected to a driving piece and capable of moving back and forth between the receiving position and the processing position, an intermediate channel capable of connecting the feeding channel and the discharging channel is arranged on the movable piece, the intermediate channel can limit an outer ring in the moving direction of the movable piece, and a supporting piece linked with the movable piece is further arranged, when the intermediate channel on the movable piece is located at the receiving position, the supporting piece can receive the outer ring falling from the intermediate channel, and the outer ring falling from the feeding channel can be located in the intermediate channel, when the intermediate channel on the movable piece moves to the processing position in the processing direction, the supporting piece can make the outer ring on it fall from the discharging channel, and the movable piece blocks the lower end of the feeding channel.

[0007] Preferably, the movable piece comprises a pull rod with a circular cross section and a pulling seat fixed to one end of the pull rod, the intermediate channel is arranged on the pulling seat, the pull rod is supported in the shaft hole of a bearing seat through a linear bearing, the bearing seat is positioned on the workbench, and cover plates for the pull rod to pass through are fixed to the end faces of the bearing seat, sealing pieces are arranged between the cover plates and the bearing seat and between the cover plates and the pull rod, which can ensure smooth sliding of the pull rod for a long time.

[0008] In the above scheme, further preferably, the pulling seat comprises a bottom plate corresponding to the end face of the outer ring and two limiting plates spaced apart and located on the bottom plate, the intermediate channel is formed between the two limiting plates and the bottom plate, a first through hole is arranged on the bottom plate for the connecting piece in the grinding wheel or the rotating mechanism to pass through, and a first baffle is further arranged on the bottom plate, when the intermediate channel is located at the processing position, the first baffle blocks the lower end of the feeding channel, and such a design makes the structure of the pulling seat simple and convenient to process.

[0009] To prevent the bearing from falling, preferably, the pulling seat further comprises a panel, a second through hole is arranged on the panel for the connecting piece in the rotating mechanism or the grinding wheel to pass through, and a second baffle capable of blocking the outer ring in the intermediate channel is arranged between the receiving position and the processing position.

[0010] Further preferably, the rotating mechanism comprises a main motor and a coil, the connecting member is a magnetic guide cover fixed on the output shaft of the main motor, and the coil is arranged at the connecting position of the magnetic guide cover and the output shaft of the main motor. The end surface of the outer ring is connected in a magnetic manner, which can avoid the deformation of the outer ring caused by radial clamping.

[0011] Preferably, the limiting member is two radially arranged ejector pins, and the two ejector pins are respectively arranged on the two sides of the material pulling seat at the processing position, and the top end of the ejector pin faces the pulling rod. Preferably, the included angle between the centers of the two ejector pins is 120°.

[0012] The structure of the supporting member can be various. Preferably, the supporting member is an L-shaped support, the upper end of the vertical part of the L-shaped support is fixed on the movable member, when the middle channel on the movable member is located at the receiving position, the horizontal part of the L-shaped support is located in the discharging channel, when the middle channel on the movable member moves to the processing position, the horizontal part of the L-shaped support leaves the discharging channel, and a avoiding slot is arranged in the discharging channel for the horizontal part to pass through. Such a supporting member has a simple structure and the outer ring of the bearing falls smoothly.

[0013] Alternatively, the supporting member is designed as a supporting plate extending along the movement direction of the movable member and arranged in the avoiding channel of the discharging channel, the end of the supporting plate away from the processing position is fixed on the movable member through a connecting plate, and a discharging hole penetrating up and down is arranged in the supporting plate for the outer ring to fall, and the discharging hole corresponds to the discharging channel when the middle channel on the movable member is located at the processing position. Such a scheme also supports the outer ring of the bearing and can make the outer ring fall on demand.

[0014] Alternatively, the supporting member is a material blocking rod, the upper end of the material blocking rod is connected with the movable member through a connecting rod assembly, when the middle channel on the movable member is located at the receiving position, the lower end of the material blocking rod can extend into the discharging channel, when the middle channel on the movable member moves to the processing position, the lower end of the material blocking rod leaves the discharging channel. Such a scheme has more flexible action.

[0015] Compared with the prior art, the grinding device has the advantages that: the outer ring on the machining position is no longer affected by the outer ring in the feeding channel, the outer ring after machining falls on the supporting piece, and when the pulling mechanism feeds the outer ring to the machining position again, the machined outer ring on the supporting piece falls into the discharging channel. Obviously, the grinding device has the advantages that: the structure is relatively simple, the cost is low, the feeding and discharging are convenient, the production efficiency is high, the influence of the outer ring in the feeding channel on the outer ring at the machining position is reduced, and the extrusion deformation between the outer rings is avoided. Especially, the connection mode of the magnetic cover adsorbing the end surface of the outer ring can effectively prevent the deformation of the outer ring, so that the qualified rate of grinding can be improved. In addition, the linear bearing is arranged between the pulling rod and the bearing seat in the pulling mechanism, and the cover plate and the sealing element are used for shielding, so that the cooling water and the grinding wheel dust during grinding can be effectively prevented from entering the movement pair between the pulling rod and the bearing seat, the pulling rod can be smoothly reciprocated for a long time, the equipment failure is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the first embodiment of the utility model (the middle channel is at the receiving position, and the front side plates of the feeding and discharging channels and the panel on the pulling seat are removed);

[0017] Figure 2 It is a perspective view of the first embodiment of the utility model (the middle channel is at the receiving position, and the front side plates of the feeding and discharging channels and the panel on the pulling seat are removed); Figure 1

[0018] Figure 3 It is a front view of the main part in the first embodiment of the utility model (the middle channel is at the receiving position); Figure 3

[0019] Figure 4 It is a partial enlarged view in the first embodiment of the utility model; Figure 3

[0020] Figure 5 It is a partial perspective view of another direction of the first embodiment of the utility model; Figure 4

[0021] Figure 6 It is a perspective view of the rotating mechanism in the first embodiment of the utility model; Figure 5

[0022] Figure 7 It is a sectional view of A-A in the first embodiment of the utility model; Figure 1

[0023] Figure 8 It is another distribution view of the limiting piece;

[0024] Figure 9 It is a perspective view of the second embodiment of the utility model (the supporting piece is designed as an L shape).​​​​​​ Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In the following description of the embodiments, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention 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. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] like Figures 1-7 The image shows a grinding device for the outer raceway of a bearing. It includes a worktable 1, a feeding mechanism 2, a grinding wheel 3, a rotating mechanism 4, and a limiting component 5. The worktable 1 has a machining position B. Figure 1 and Figure 3 The dotted lines indicate the locations of the feed channel 6 and the discharge channel 7. In the figure, feed channel 6 and discharge channel 7 are distributed from top to bottom. For ease of understanding, their front side plates are omitted to illustrate the outer ring 100 of the bearings in feed channel 6 and discharge channel 7. Feed channel 6 and discharge channel 7 can be independently supported on the worktable 1, or... Figure 1 As shown, it is installed on an upright mounting plate 11, which can be fixed to the table surface of the workbench 1. A receiving position C is provided between the feeding channel 6 and the unloading channel 7. Figure 1 and Figure 3 The processing position is located on one side of the receiving position C, as indicated by the dotted line in the diagram. Figure 1 and Figure 3 (The middle is the right side).

[0028] The aforementioned material pulling mechanism 2 is located on the other side of the material receiving position C. Figure 1 and Figure 3The pulling mechanism 2 is used to send the outer ring at the receiving position C to the processing position B. In the embodiment, the pulling mechanism 2 comprises a movable member 20 connected with a driving member and capable of moving back and forth between the receiving position C and the processing position B. The driving member can be a pulling cylinder 8, the piston rod of which is connected with the movable member 20. An intermediate passage 201 capable of engaging the feeding passage 6 and the discharging passage 7 is arranged on the movable member 20, and the intermediate passage 201 can limit the outer ring 100 in the moving direction of the movable member 20. Specifically, the movable member 20 can be a movable rod with a square cross section, which can be limited to slide in a limiting seat, and the intermediate passage can be arranged at the end of the movable rod. In order to enable the movable member to smoothly slide in the environment of cooling water and grinding wheel dust for a long time, the movable member 20 in the embodiment preferably adopts the following structure: it comprises a pulling rod 21 with a circular cross section, a pressing plate 22 and a pulling seat 23. The middle part of the pressing plate 22 is provided with a hole for inserting the front end of the pulling rod 21, so that the two are tightly integrated. The pressing plate 22 on both sides of the hole is provided with mounting holes, so that the pressing plate 22 and the pulling seat 23 are fixed by bolts and other fasteners. The rear end of the pulling rod 21 is supported in the shaft hole of the bearing seat 02 by a linear bearing 01 to slide, please refer to Figure 7 The bearing seat 02 is positioned on the mounting plate 11, and the two end faces of the bearing seat 02 are fixed with cover plates 03 for the pulling rod to pass through. Sealing elements are arranged between the cover plates 03 and the bearing seat 02 and between the cover plates 03 and the pulling rod 21, i.e. a first sealing element 04 is arranged between the cover plates 03 and the bearing seat 02, and a second sealing element 05 is arranged between the cover plates 03 and the pulling rod 21. The first sealing element 04 can adopt a conventional O-ring or other sealing structure, and the second sealing element 05 adopts a U-shaped sealing ring. By using the first and second sealing elements, it can be ensured that the cooling water and the grinding wheel dust cannot enter the shaft hole, so that the pulling rod 21 can smoothly slide in the linear bearing 01 without being stuck. The pulling seat 23 further comprises a bottom plate 231 corresponding to the end face of the outer ring, a face plate (for the convenience of understanding the internal structure, the face plate is hidden in the figure), two limiting plates 232 spaced apart and arranged between the bottom plate 231 and the face plate, and the two limiting plates 232, the bottom plate 231 and the face plate form the intermediate passage 201. A first through hole 233 is arranged on the bottom plate 231 for the grinding wheel (or the supporting member of the rotating mechanism described below) to pass through, and a second passage is arranged on the face plate for the supporting member (or the grinding wheel) of the rotating mechanism described below. In order to conveniently adjust the pulling seat, a long hole 234 extending in the moving direction of the pulling rod is arranged on the bottom plate 231. The screw passes through the mounting hole on the pressing plate 22 and the long hole, and is connected with a nut to conveniently adjust and fix the pulling seat 23 on the pulling rod 21.

[0029] When the pulling seat 23 moves towards the processing position B, in order to prevent the outer ring in the feeding channel 6 from falling, a first baffle 235 is arranged on the bottom plate 231, which can block the lower port of the feeding channel 6 when the intermediate channel 201 leaves the lower port of the feeding channel. A second baffle 06 is arranged between the receiving position C and the processing position B, which can block the lower port of the intermediate channel 201, and can be fixed on the side wall of the discharging channel 7 or the mounting plate 11. Thus, under the action of the second baffle 06, the outer ring in the intermediate channel 201 will not easily fall during the movement of the pulling seat from the receiving position C to the processing position B. In order to make the movement of the movable part more flexible, a guide rail can be arranged on the mounting plate to cooperate with the bottom plate. Of course, a pulling channel can also be arranged directly between the receiving position C and the processing position B, which can guide the movement of the pulling seat and prevent the outer ring from falling during the movement of the pulling seat, that is, the pulling seat can omit the face plate.

[0030] In order to smoothly drop the processed outer ring from the discharging channel 7, a supporting part is arranged to cooperate with the movable part 20, and the distance between the supporting part and the intermediate channel 201 needs to meet the following condition: when the supporting part supports an outer ring, the outer ring is called the first outer ring, which is the lowest outer ring, and the second outer ring above the first outer ring is located in the intermediate channel 201. In the embodiment, the supporting part is designed as a supporting plate 9a extending along the movement direction of the movable part. In order not to hinder the movement of the supporting plate 9a with the movable part 20, an avoiding channel 71 is opened in the discharging channel 7, and the supporting plate 9a can slide in the avoiding channel 71. The end of the supporting plate 9a away from the processing position B is fixed to the bottom plate 231 of the pulling seat through a connecting plate 07, and a discharging hole 91a is opened in the supporting plate 9a to allow the outer ring to fall. When the intermediate channel 201 on the pulling seat 23 is located at the processing position B, the discharging hole 91a corresponds to the discharging channel 7.

[0031] In the embodiment, the above-mentioned grinding wheel 3 is installed at the rear side of the processing position B (or can be installed at the front side of the processing position B), which is used to process the outer ring channel. According to the prior art, the grinding wheel 3 is installed on the conveying shaft of the grinding wheel motor, and the grinding wheel motor is installed on the sliding block on the sliding rail. Under the action of the main cylinder or other driving part, the grinding wheel 3 can move forward and backward towards the processing position B to extend into the outer ring at the processing position B, so as to process the outer ring channel. Since this is the prior art, the grinding wheel motor and the corresponding main cylinder and other parts are not shown in the figure.

[0032] The above-mentioned rotating mechanism 4 can drive the outer ring at the processing position B to rotate, which is located at the front side of the processing position B (or can be located at the rear side of the processing position B) in the figure, and includes a main motor (not shown in the figure), a coil 42 and a connecting part. Please refer toFigure 6 Wherein the cross section of the connecting piece is designed as a U-shaped magnetic shield 41, the annular end face of the magnetic shield corresponds to the front end face of the outer ring at the machining position B, the bottom of the magnetic shield 41 is fixed on the output shaft of the main motor by bolts, and the coil is located at the connecting position of the magnetic shield 41 and the output shaft of the main motor. When the outer ring at the machining position B needs to be machined, the coil 42 is energized to make the magnetic shield 41 have magnetism and can attract the outer ring, at this time the main motor is energized, and the outer ring can be driven to rotate together through the electromagnetic shield 41.

[0033] The above-mentioned limiting piece 5 is located at the machining position B and is used to position the outer ring transported to the machining position B. In the figure, the limiting piece 5 is two radially arranged ejector pins, which can be located below the middle channel at the machining position B to receive the outer ring in the middle channel at this time, but the two ejector pins can also be located on both sides of the pulling seat at the machining position B, please refer to Figure 8 , and the top of the ejector pin faces the above-mentioned pull rod 21. Through actual test, when the included angle α between the centers of the two ejector pins is 120°, the limiting effect is better.

[0034] In the initial state, the intermediate channel of the pulling seat is located at the receiving position C, at this time, the feeding channel is connected with the discharging channel through the intermediate channel, that is, the outer ring in the feeding channel can fall into the discharging channel through the intermediate channel, but the first outer ring falling from the intermediate channel can be received by the supporting plate 9a, and the second outer ring falling again in the feeding channel can be located in the intermediate channel, as shown in Fig. 1. Then the pulling cylinder is actuated to drive the second outer ring (i.e. the outer ring in the intermediate channel) at the receiving position C to move to the processing position B through the pulling rod and the pulling seat, at this time, the supporting plate 9a moves to the processing position B, and the first outer ring carried thereon is limited in the discharging channel by the side wall of the discharging channel, and the first baffle 235 on the bottom plate of the pulling seat blocks the lower port of the feeding channel to prevent the third outer ring from falling. When the pulling seat carries the second outer ring to the top of the ejector pin, the pulling cylinder stops working, at this time, the discharging hole of the supporting plate 9a corresponds to the discharging channel, so that the first outer ring falls from the discharging hole (in actual work, the unprocessed first outer ring is manually picked out), and the coil is electrified, the magnetically conductive cover is magnetized to attract the end face of the second outer ring at the processing position B, the main motor is electrified to rotate to drive the second outer ring to rotate, then the grinding wheel 3 moves to the second outer ring and extends into the second outer ring to grind the groove of the second outer ring at a certain speed until the processing is completed, the grinding wheel 3 retreats, the coil is de-energized, the magnetically conductive cover is demagnetized to be separated from the second outer ring, at this time, the pulling cylinder is actuated to drive the pulling rod to retract to drive the pulling seat to move to the receiving position C, until the intermediate channel is located between the feeding channel and the discharging channel, at this time, the processed second outer ring in the intermediate channel falls on the supporting plate 9a, and the third outer ring in the feeding channel falls into the intermediate channel. Then the pulling cylinder is actuated again to drive the pulling seat to move to the processing position B, with the movement of the supporting plate 9a to the processing position B, the discharging hole of the supporting plate 9a gradually enters the discharging channel, when it is completely entered, the processed second outer ring can fall from the discharging hole to the discharging channel, and at the same time, when the third outer ring to be processed on the pulling seat is located at the processing position B, the groove is ground in the above-mentioned manner. Thus, the groove processing of the bearing outer ring is completed.

[0035] In addition to the preferred embodiment described above, the supporting member can also be used as Figure 9The structure shown, i.e. the support member at this time is designed as an L-shaped bracket 9b, the vertical part of which is inclined to the processing position B direction, the upper end of which is fixed on the bottom plate 231, the horizontal part of which is located in the discharging channel 7 when the intermediate channel 201 on the movable member is located at the receiving position C, and plays the role of supporting the first outer ring, the horizontal part of the L-shaped bracket 9b is away from the discharging channel 7 when the intermediate channel on the movable member 20 moves to the processing position B direction, at this time, the outer ring thereon can fall into the discharging channel 7 more quickly. In order to avoid interference with the L-shaped bracket 9b, a relief groove 72 is provided in the discharging channel 7 for the horizontal part to pass through.

[0036] In addition to the above, the support member can also be a material blocking rod, the upper end of which is connected with the movable member through a linkage assembly to realize linkage with the movable member, the requirement is that the lower end of the material blocking rod can extend into the discharging channel when the intermediate channel on the movable member is located at the receiving position C, the lower end of the material blocking rod is away from the discharging channel when the intermediate channel on the movable member moves to the processing position B direction to the processing position, the purpose and effect are the same as above, and will not be repeated here.

Claims

1. A grinding apparatus for the outer ring groove of a bearing, comprising a worktable (1) with a machining position (B), a feed channel (6) and a discharge channel (7) located on the worktable (1), a grinding wheel (3) for machining the outer ring groove, a rotating mechanism (4) capable of rotating the outer ring at the machining position (B), and a limiting member (5) located at the machining position for positioning the outer ring, characterized in that: The feeding channel (6) and the discharging channel (7) are arranged from top to bottom, and a receiving position (C) is arranged between the two, the processing position (B) is arranged on one side of the receiving position (C), and a pulling mechanism (2) is arranged on the other side of the receiving position (C), the pulling mechanism (2) comprises a movable part (20) connected with a driving part and capable of moving back and forth between the receiving position (C) and the processing position (B), an intermediate channel (201) capable of connecting the feeding channel (6) and the discharging channel (7) is arranged on the movable part (20), the intermediate channel (201) is capable of limiting an outer ring in the movement direction of the movable part (20), and a supporting part connected with the movable part (20) is further arranged, when the intermediate channel (201) on the movable part (20) is located at the receiving position (C), the supporting part can receive the outer ring falling from the intermediate channel (201), and the outer ring falling from the feeding channel (6) can be located in the intermediate channel (201), when the intermediate channel (201) on the movable part (20) moves to the processing position (B) in the direction of the processing position (B), the supporting part can make the outer ring on it fall from the discharging channel (7), and meanwhile the movable part (20) blocks the lower port of the feeding channel (6).

2. The grinding device of claim 1, wherein: The movable part (20) comprises a pulling rod (21) with a circular cross section and a pulling seat (23) fixed on one end of the pulling rod (21), the intermediate channel (201) is arranged on the pulling seat (23), the pulling rod (21) is supported in the shaft hole of a bearing seat (02) through a linear bearing (01), the bearing seat (02) is positioned on the workbench (1), and cover plates (03) for the pulling rod (21) to pass through are fixed on the two end faces of the bearing seat (02), sealing elements are arranged between the cover plates (03) and the bearing seat (02) and between the cover plates (03) and the pulling rod (21).

3. The grinding device of claim 2, wherein: The pulling seat (23) comprises a bottom plate (231) corresponding to the end face of the outer ring and two spaced-apart limiting plates (232) positioned on the bottom plate (231), the two limiting plates (232) and the bottom plate (231) form the intermediate channel (201), a first through hole (233) for a connecting part in a rotating mechanism or a grinding wheel (3) to pass through is arranged on the bottom plate (231), and a first baffle (235) is further arranged on the bottom plate (231), when the intermediate channel (201) is located at the processing position (B), the first baffle (235) blocks the lower port of the feeding channel (6).

4. The grinding device of claim 3, wherein: The pulling seat (23) further comprises a panel, a second through hole for the connecting part in the rotating mechanism or the grinding wheel (3) to pass through is arranged on the panel, and a second baffle (06) capable of blocking the outer ring in the intermediate channel (201) is arranged between the receiving position (C) and the processing position (B).

5. The grinding device of claim 4, wherein: The rotating mechanism (4) comprises a main motor and a coil (42), the connecting part is a magnetic shielding cover (41) fixed on the output shaft of the main motor, and the coil (42) is arranged at the connecting position of the magnetic shielding cover (41) and the output shaft of the main motor.

6. The grinding device of claim 2, wherein: The limiting member (5) is two radially arranged ejector pins, which are respectively located on both sides of the pulling seat (23) of the processing position (B), and the top end of each ejector pin faces the pulling rod (21).

7. The grinding device of claim 6, wherein: The included angle of the two ejector pins is 120°.

8. The grinding device according to any one of claims 1 to 7, characterized in that: The supporting member is an L-shaped support (9b), the vertical part of which is fixed on the movable member (20), when the intermediate channel (201) on the movable member (20) is located at the receiving position (C), the horizontal part of the L-shaped support (9b) is located in the discharging channel (7), when the intermediate channel (201) on the movable member (20) moves to the processing position (B), the horizontal part of the L-shaped support (9b) leaves the discharging channel (7), and meanwhile, the discharging channel (7) is provided with an avoiding slot (72) for the horizontal part.

9. The grinding device according to any one of claims 1 to 7, characterized in that: The supporting member is designed as a supporting plate (9a) which extends along the movement direction of the movable member (20) and is arranged in the avoiding channel of the discharging channel (7), the end of the supporting plate (9a) away from the processing position (B) is fixed on the movable member (20) through a connecting plate (07), and the supporting plate (9a) is provided with a discharging hole (91a) which penetrates the supporting plate (9a) from top to bottom and is used for the outer ring to fall, when the intermediate channel (201) on the movable member (20) is located at the processing position (B), the discharging hole (91a) corresponds to the discharging channel (7).

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