A grinding device for a bearing inner ring raceway

Abstract

The utility model relates to bearing processing technology field especially a kind of grinding device of bearing inner raceway, including machine body, the other side of machine body top is provided with support frame, support frame top is connected with first rotating shaft by bearing, first rotating shaft one end is connected with fixed frame, the both ends of fixed frame are respectively connected with second rotating shaft by bearing, one of second rotating shaft is installed with grinding wheel, another second rotating shaft is installed with polishing wheel, servo motor is equipped on fixed frame, its output shaft is connected with the other end of first rotating shaft;Third rotating shaft is also installed on fixed frame by bearing;Transmission assembly is equipped on fixed frame, for the power of third rotating shaft is selectively transmitted to any second rotating shaft. The device is installed in the same fixed frame by grinding and polishing tool, and share a set of transmission system, ensure that processing datum is consistent, effectively avoid the positioning error caused by equipment replacement.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a grinding device for the inner ring raceway of a bearing. Background Technology

[0002] Bearings are crucial components in mechanical equipment. Their main function is to support rotating parts of the machine, reduce the coefficient of friction during movement, and ensure rotational accuracy. They are typically manufactured by grinding; however, grinding equipment still suffers from the following drawbacks in practical use:

[0003] When machining bearing raceways (taking the inner raceway of the outer ring as an example), the entire machining process cannot be completed using a single grinding tool. To ensure efficient bearing operation, the raceway must have a high surface finish to allow the rolling elements to pass smoothly and minimize friction. However, conventional grinding equipment requires frequent changes of grinding wheels made of different materials to achieve progressive polishing, resulting in a cumbersome operation process, low processing efficiency, and difficulty in achieving rapid machining of the raceway. Moreover, changing grinding wheels often leads to adjustments in the parameters or structure of the machining equipment, and requires re-clamping and repositioning of the bearing inner ring, which alters the original machining datum, introduces repetitive positioning errors, and ultimately affects the machining quality and consistency of the raceway. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where changing the grinding wheel often leads to adjustments in the parameters or structure of the processing equipment, and requires re-clamping and repositioning of the bearing inner ring, which changes the original processing datum, introduces repeated positioning errors, and ultimately affects the processing quality and consistency of the raceway. Therefore, this invention proposes a grinding device for the bearing inner ring raceway.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grinding device for the inner ring raceway of a bearing is designed, comprising a machine body, a workpiece adjustment mechanism provided on one side of the top of the machine body, the workpiece adjustment mechanism being provided with a fixed chuck for clamping the workpiece, a support frame provided on the other side of the top of the machine body, a first rotating shaft connected to the top of the support frame via a bearing, a fixed frame connected to one end of the first rotating shaft, and a second rotating shaft connected to both ends of the fixed frame via bearings, wherein a grinding wheel is mounted on one of the second rotating shafts and a polishing wheel is mounted on the other second rotating shaft;

[0007] The fixed frame is equipped with a servo motor, the output shaft of which is connected to the other end of the first rotating shaft; a third rotating shaft is also mounted on the fixed frame via bearings, and the third rotating shaft is connected to a drive motor.

[0008] The fixed frame is equipped with a transmission assembly for selectively transmitting the power of the third rotating shaft to any one of the second rotating shafts.

[0009] Preferably, the workpiece adjustment mechanism includes a slide rail seat disposed on one side of the top of the machine body, a movable seat that can move laterally on the slide rail seat, a fixed chuck for clamping the workpiece disposed on the top of the movable seat, a drive assembly for driving the fixed chuck to rotate on the movable seat, and telescopic components disposed on both the slide rail seat and the movable seat for realizing the lateral movement of the movable seat along the slide rail seat and the longitudinal movement of the fixed chuck relative to the movable seat.

[0010] Preferably, the transmission assembly includes a connecting seat fixed on a fixed frame, a sliding groove is provided on the connecting seat, a movable block is slidably disposed in the sliding groove, and an electric telescopic rod is installed on the connecting seat, the output end of which is connected to the movable block;

[0011] The bottom of the movable block is connected to a connecting frame, one end of which is connected to a connecting shaft via a bearing. One end of the connecting shaft can selectively extend into a slot provided at the end of a third rotating shaft or any second rotating shaft.

[0012] Preferably, a nitrided hardening layer is provided on the outer side of the movable block.

[0013] Preferably, both the end of the second rotating shaft and the end of the third rotating shaft are provided with slots that cooperate with the connecting shaft, and these slots are aligned on the moving path of the connecting shaft; the fixing frame is rotatably mounted on the support frame via the first rotating shaft and is driven by a servo motor to realize the switching of the working position of the grinding wheel and the polishing wheel.

[0014] Preferably, a nozzle is connected to the fixing frame, and the nozzle is configured as a gooseneck tube.

[0015] The present invention provides a grinding device for the inner ring raceway of a bearing, which has the following advantages: by installing the grinding and polishing tools on the same fixed frame and sharing a transmission system, the processing datum is ensured to be consistent, effectively avoiding positioning errors caused by equipment replacement and improving the processing quality of the inner ring of the bearing. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a grinding device for the inner ring raceway of a bearing proposed in this utility model. Figure 1 .

[0017] Figure 2 A schematic diagram of the structure of a grinding device for the inner ring raceway of a bearing proposed in this utility model. Figure 2 .

[0018] Figure 3This is a front view of a partial structural cross-sectional view of a grinding device for the inner ring raceway of a bearing proposed in this utility model.

[0019] Figure 4 for Figure 3 A magnified view of a portion at point A.

[0020] Figure 5 This is an exploded magnified structural diagram of a portion of the grinding device for the inner ring raceway of a bearing proposed in this utility model.

[0021] Figure 6 for Figure 5 A magnified view of a section at point B.

[0022] In the diagram: 1. Body; 2. Slide rail seat; 3. Movable seat; 4. Fixed chuck; 5. Support frame; 6. First rotating shaft; 7. Fixed frame; 8. Second rotating shaft; 9. Grinding wheel; 10. Polishing wheel; 11. Servo motor; 12. Third rotating shaft; 13. Drive motor; 14. Connecting seat; 15. Slide groove; 16. Moving block; 17. Connecting frame; 18. Connecting shaft; 19. Slot; 20. Nozzle; 21. Electric telescopic rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1: Refer to Figure 1-6 A grinding device for the inner ring raceway of a bearing includes a machine body 1. A workpiece adjustment mechanism is provided on one side of the top of the machine body 1. The workpiece adjustment mechanism is provided with a fixed chuck 4 for clamping the workpiece. A support frame 5 is provided on the other side of the top of the machine body 1. A first rotating shaft 6 is connected to the top of the support frame 5 through a bearing. A fixed frame 7 is connected to one end of the first rotating shaft 6. A second rotating shaft 8 is connected to both ends of the fixed frame 7 through bearings. A grinding wheel 9 is installed on one of the second rotating shafts 8, and a polishing wheel 10 is installed on the other second rotating shaft 8.

[0025] A servo motor 11 is mounted on the fixed frame 7, and its output shaft is connected to the other end of the first rotating shaft 6; a third rotating shaft 12 is also mounted on the fixed frame 7 via bearings, and the third rotating shaft 12 is connected to a drive motor 13;

[0026] A transmission assembly is provided on the fixed frame 7. The transmission assembly includes a connecting seat 14 fixed on the fixed frame 7. A sliding groove 15 is provided on the connecting seat 14. A moving block 16 is slidably arranged in the sliding groove 15. An electric telescopic rod 21 is installed on the connecting seat 14, and its output end is connected to the moving block 16. A connecting frame 17 is connected to the bottom of the moving block 16. One end of the connecting frame 17 is connected to a connecting shaft 18 through a bearing. The ends of the second rotating shaft 8 and the third rotating shaft 12 are provided with slots 19 that cooperate with the connecting shaft 18. These slots 19 are aligned on the moving path of the connecting shaft 18. One end of the connecting shaft 18 can selectively extend into the slot 19 provided at the end of the third rotating shaft 12 or any of the second rotating shafts 8, so as to selectively transmit the power of the third rotating shaft 12 to any of the second rotating shafts 8.

[0027] Usage: After fixing the inner ring of the bearing to be ground onto the chuck 4, start the servo motor 11. The servo motor rotates slowly, driving the first rotating shaft 6 to rotate, which in turn drives the fixing frame 7 to rotate. The fixing frame 7 drives the two second rotating shafts 8 to rotate together until the slot 19 of one of the second rotating shafts 8 is aligned with the slot of the third rotating shaft 12. At this time, start the electric telescopic rod 21, whose output end pushes the moving block 16 to move along the slide 15, which in turn drives the connecting shaft 18 to move through the connecting frame 17, so that the third rotating shaft 12, the connecting shaft 18 and the second rotating shaft 8 are connected.

[0028] Then the drive motor 13 is started, and its output shaft drives the third rotating shaft 12 to rotate, which in turn drives the corresponding second rotating shaft 8 to rotate through the connecting shaft 18, so that the grinding wheel 9 mounted on the shaft can start grinding.

[0029] After grinding is completed, the grinding wheel retracts from the workpiece, and the electric telescopic rod 21 retracts, causing the connecting shaft 18 to disengage from the second connecting shaft 8 with the grinding wheel 9. The servo motor 11 is then restarted. As the servo motor 11 rotates slowly, it will cause the first rotating shaft 6 to rotate. As the first rotating shaft 6 rotates, it will cause the fixing frame 7 to rotate. The electric telescopic rod 21 is then extended, pushing the connecting shaft 18 to move to another position, so that the slot 19 of the other second rotating shaft 8 (with polishing wheel 10) is aligned with the slot of the third rotating shaft 12. The electric telescopic rod 21 is then extended again, pushing the connecting shaft 18 to simultaneously insert into the slots of the third rotating shaft 12 and the second rotating shaft 8.

[0030] At this time, the drive motor 13 starts, driving the second rotating shaft 8 to rotate via the third rotating shaft 12 and the connecting shaft 18, thereby causing the polishing wheel 10 to perform polishing. Since the grinding and polishing tools are mounted on the same fixed frame and share a transmission system, the processing datum is kept consistent, effectively avoiding positioning errors caused by equipment replacement and improving the processing quality of the bearing inner ring.

[0031] Example 2: An optimization based on Example 1, with reference to... Figure 1-6 The workpiece adjustment mechanism includes a slide rail seat 2 located on one side of the top of the machine body 1. A laterally movable moving seat 3 is mounted on the slide rail seat 2. A fixed chuck 4 for clamping the workpiece is mounted on the top of the moving seat 3. The moving seat 3 also has a drive assembly for rotating the fixed chuck 4. Both the slide rail seat 2 and the moving seat 3 are equipped with telescopic components to enable the moving seat 3 to move laterally along the slide rail seat 2 and the fixed chuck 4 to move longitudinally relative to the moving seat 3. This makes it easier to adjust the position of the bearing inner ring clamped on the fixed chuck 4 relative to the grinding wheel 9 or polishing wheel 10, allowing for quick adjustment of the grinding height and processing position when the bearing inner ring specifications change.

[0032] Example 3: An optimization based on Example 1, with reference to... Figure 1-6 The fixing frame 7 is rotatably mounted on the support frame 5 via the first rotating shaft 6 and driven by the servo motor 11 to switch the working positions of the grinding wheel 9 and the polishing wheel 10. Rotating the fixing frame 7 reduces the difficulty of switching the grinding wheel 9 and the polishing wheel 10 into position. The workpiece does not need to be re-clamped and repositioned; both processes can be completed in a single clamping operation. This reduces non-machining time and improves the machining efficiency of the bearing inner ring.

[0033] Example 4: An optimization based on Example 1, referencing... Figure 1-6 The fixed frame 7 is connected to a nozzle 20, which is a gooseneck tube. Its angle can be flexibly adjusted, which can spray cutting fluid into the grinding area so that the inner ring of the bearing can be cooled during the grinding process, thereby reducing the occurrence of high-temperature oxidation of the inner ring of the bearing. The outer side of the moving block 16 is provided with a nitrided hardening layer, which makes the moving block 16 less prone to wear, thereby extending the service life of the moving block 16.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grinding apparatus for the inner ring raceway of a bearing, comprising a machine body (1), characterized in that, A workpiece adjustment mechanism is provided on one side of the top of the machine body (1), and a fixed chuck (4) is provided on the workpiece adjustment mechanism. A support frame (5) is provided on the other side of the top of the machine body (1). A first rotating shaft (6) is connected to the top of the support frame (5) through a bearing. A fixed frame (7) is connected to one end of the first rotating shaft (6). A second rotating shaft (8) is connected to both ends of the fixed frame (7) through bearings. A grinding wheel (9) is installed on one of the second rotating shafts (8), and a polishing wheel (10) is installed on the other second rotating shaft (8). The fixed frame (7) is equipped with a servo motor (11), whose output shaft is connected to the other end of the first rotating shaft (6); the fixed frame (7) is also equipped with a third rotating shaft (12) through a bearing, and the third rotating shaft (12) is connected to a drive motor (13); The fixed frame (7) is provided with a transmission assembly for selectively transmitting the power of the third rotating shaft (12) to any one of the second rotating shafts (8).

2. The grinding apparatus for the bearing inner ring raceway according to claim 1, characterized in that, The workpiece adjustment mechanism includes a slide rail seat (2) set on one side of the top of the machine body (1). The slide rail seat (2) is provided with a movable seat (3) that can move laterally. The top of the movable seat (3) is connected to a fixed chuck (4) for clamping the workpiece. The movable seat (3) is also provided with a drive component for driving the fixed chuck (4) to rotate. Both the slide rail seat (2) and the movable seat (3) are provided with telescopic components.

3. The grinding apparatus for the bearing inner ring raceway according to claim 1, characterized in that, The transmission assembly includes a connecting seat (14) fixed on a fixed frame (7), a sliding groove (15) is provided on the connecting seat (14), a moving block (16) is slidably arranged in the sliding groove (15), and an electric telescopic rod (21) is installed on the connecting seat (14), the output end of which is connected to the moving block (16). The bottom of the movable block (16) is connected to a connecting frame (17), one end of which is connected to a connecting shaft (18) via a bearing. One end of the connecting shaft (18) can selectively extend into a slot (19) provided at the end of the third rotating shaft (12) or any second rotating shaft (8).

4. The grinding apparatus for the bearing inner ring raceway according to claim 3, characterized in that, A nitrided hardening layer is provided on the outside of the movable block (16).

5. The grinding apparatus for the bearing inner ring raceway according to claim 3, characterized in that, The ends of the second rotating shaft (8) and the third rotating shaft (12) are provided with slots (19) that cooperate with the connecting shaft (18), and these slots (19) are aligned on the moving path of the connecting shaft (18); the fixing frame (7) is rotatably mounted on the support frame (5) via the first rotating shaft (6).

6. The grinding apparatus for the bearing inner ring raceway according to claim 1, characterized in that, The fixing frame (7) is connected to a nozzle (20), which is configured as a gooseneck tube.

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