An internal and external automatic grinding machine for the outer ring of a bearing

Abstract

The present invention relates to an internal and external automatic grinding machine for the outer ring of a bearing, belonging to the technical field of grinding machines. It includes a machine tool main body, and an inner ring grinding mechanism and an outer ring grinding mechanism for grinding the outer ring of the bearing are installed on the bracket; a synchronous adjustment device for synchronously adjusting the inner ring grinding mechanism and the outer ring grinding mechanism to approach or move away from the outer ring of the bearing is installed on the bracket; a fixture for clamping the upper and lower ends of the outer ring of the bearing is installed inside the machine tool main body; an auxiliary clamping device for assisting the fixture to clamp is installed on the inner ring grinding mechanism. In the present invention, a single driving motor drives the inner ring grinding mechanism and the outer ring grinding mechanism to rotate, so as to grind the inside and outside of the outer ring of the bearing, and simultaneous grinding can be achieved; in the present invention, the synchronous adjustment device drives the fine adjustment motor to simultaneously drive the outer ring grinding wheel and the outer ring grinding wheel to approach or move away from the outer ring of the bearing, which can effectively balance the stress on the inner and outer circumferential surfaces of the outer ring of the bearing, thereby preventing the outer ring of the bearing from deforming during grinding.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, and specifically refers to an internal and external automatic grinding machine for the outer ring of a bearing. Background Art

[0002] A bearing is an important component in contemporary mechanical equipment. Its main function is to support the rotating body of the machine, reduce the friction coefficient during its movement, and ensure its rotational accuracy. According to the different friction properties of the moving elements, bearings can be divided into two major categories: rolling bearings and sliding bearings. Among them, rolling bearings have been standardized and serialized. However, compared with sliding bearings, their radial dimensions, vibration, and noise are larger, and the price is also higher. A rolling bearing generally consists of four parts: an outer ring, an inner ring, rolling elements, and a cage. According to the shape of the rolling elements, rolling bearings are divided into two major categories: ball bearings and roller bearings. A grinding machine is a machine tool that uses grinding tools to perform grinding processing on the surface of workpieces. Most grinding machines use a high-speed rotating grinding wheel for grinding processing, and a few use other grinding tools such as oilstones and abrasive belts and loose abrasives for processing, such as honing machines, superfinishing machines, abrasive belt grinding machines, grinding machines, and polishing machines. The existing outer ring of the bearing needs to be ground when it is a finished product. The existing grinding machines cannot effectively grind the inner and outer walls of the outer ring at the same time, and it is easy to cause obstruction during grinding, affecting the grinding effect and efficiency. The fixing performance is poor, and it is easy to displace during grinding, affecting the accuracy of the outer ring and making the outer ring unable to meet the use requirements. Summary of the Invention

[0003] The present invention aims to solve the above technical problems and provides an internal and external automatic grinding machine for the outer ring of a bearing.

[0004] To solve the above technical problems, the technical solution provided by the present invention is as follows:

[0005] An internal and external automatic grinding machine for the outer ring of a bearing, comprising a machine tool main body, a bracket adjustable within the machine tool main body, and a telescopic cylinder fixedly connected to the machine tool main body. An inner ring grinding mechanism and an outer ring grinding mechanism for grinding the outer ring of the bearing are installed on the bracket;

[0006] A synchronous adjustment device for synchronously adjusting the inner ring grinding mechanism and the outer ring grinding mechanism to approach or move away from the outer ring of the bearing is installed on the bracket;

[0007] A fixture for clamping the upper and lower ends of the outer ring of the bearing is installed within the machine tool main body;

[0008] An auxiliary clamping device for assisting the fixture to clamp is installed on the inner ring grinding mechanism;

[0009] A driving motor for driving the inner ring grinding mechanism and the outer ring grinding mechanism to rotate and grind is installed on the bracket. A fixed bracket is bolted to one side of the driving motor, and the telescopic end of the telescopic cylinder is connected to the fixed bracket.

[0010] Preferably, the inner ring grinding mechanism includes a connecting column rotatably connected to a bracket, three driving sprockets and driving chains. The driving chains are wound outside the three driving sprockets. Fixed shafts are installed on all three driving sprockets. The upper and lower ends of the fixed shafts are connected to a connecting plate through bearings, and the other end of the connecting plate is fixedly connected to the connecting column. A connecting frame is installed outside the fixed shaft, and a rotatable inner ring grinding wheel is installed on the connecting frame. A fine-tuning motor is bolted to the bracket, and one side of the fine-tuning motor is connected to the connecting plate. One of the fixed shafts is connected to the rotating end of the fine-tuning motor, and the fine-tuning motor drives the driving sprocket to rotate to drive the inner ring grinding wheel to approach or move away from the outer ring of the bearing. The upper end of the connecting column is connected to the output end of the driving motor.

[0011] Preferably, the outer ring grinding mechanism includes a grinding shell and an outer ring grinding wheel. A C-shaped grinding frame is slidably connected inside the grinding shell, and the outer ring grinding wheel is rotatably connected inside the C-shaped grinding frame through a bearing. A telescopic rod is installed inside the grinding shell, and a push block is installed at the telescopic end of the telescopic rod. A blocking block is installed at the lower end of the C-shaped grinding frame, and the blocking block is located inside the push block. A first fixing plate is installed between the bracket and the grinding shell.

[0012] Preferably, the synchronous adjustment device includes a driven shaft connected to the bracket through a bearing, a first driven sprocket installed at both ends of the driven shaft, and a second driven sprocket connected to the outside of the connecting column through a bearing. A third driven sprocket is connected to the lower end of the driving sprocket. Chains are respectively connected between the two first driven sprockets and the second driven sprocket and the driving sprocket. A follower pulley is installed at the lower end of the second driven sprocket. A slider is installed on the C-shaped grinding frame, and a fixed wheel is fixedly connected to the slider. A rope is connected between the follower pulley and the fixed wheel.

[0013] Preferably, a chute for cooperating with the slider is opened on the grinding shell. A moving column is installed on one side of the C-shaped grinding frame, and the moving column penetrates through the grinding shell. A return spring is installed outside the moving column and between the grinding shell and the C-shaped grinding frame.

[0014] Preferably, the fixture includes a base installed inside the machine tool main body and a plurality of first piston cylinders uniformly arranged on the base. A groove and a chamber communicating with the first piston cylinder are opened inside the upper end of the base. A first piston is installed inside the first piston cylinder, and a support column for abutting against the outer ring of the bearing is installed on the first piston. A movable annular piston is installed inside the groove. A plurality of second fixing plates are installed outside the bracket. A guide column is installed at the lower end of the second fixing plate, and a limit ring is installed at the lower end of the guide column and extends into the groove. A first rolling wheel for abutting against the annular piston is installed at the lower end of the limit ring. A second rolling wheel for abutting against the upper end of the outer ring of the bearing is installed at the lower end of the second fixing plate.

[0015] Preferably, the auxiliary clamping device includes a moving shaft, a third piston outside the moving shaft, and an adjusting cylinder. A sealing cavity for the movement of the third piston is provided in the adjusting cylinder. The moving shaft penetrates the adjusting cylinder and can move on the adjusting cylinder. The middle of the driving chain is disconnected, and both ends are respectively connected to both ends of the moving shaft. A connecting block is installed between the adjusting cylinder and the connecting column. A moving groove is provided inside the lower end of the connecting column. A communicating groove is provided in the connecting block, and the communicating groove communicates the moving groove and the sealing cavity. A fourth piston is installed in the moving groove and below the communicating groove. A moving block is installed at the lower end of the fourth piston, and a sphere is movably connected to the lower end of the moving block.

[0016] Preferably, a second piston cylinder and a fifth piston inside the second piston cylinder are installed at the center of the base. A limiting block is installed on the fifth piston, and a moving groove for the use of the sphere is provided at the upper end of the limiting block.

[0017] After adopting the above structure, the present invention has the following advantages:

[0018] 1. The present invention drives the inner ring grinding mechanism and the outer ring grinding mechanism to rotate through a single driving motor, so as to grind the inner and outer sides of the bearing outer ring, and simultaneous grinding can be achieved.

[0019] 2. The fine-tuning motor of the synchronous adjustment device of the present invention can drive the outer ring grinding wheel and the outer ring grinding wheel to approach or move away from the bearing outer ring at the same time, which can effectively balance the stress on the inner and outer circumferential surfaces of the bearing outer ring, thereby preventing the bearing outer ring from deforming during grinding.

[0020] 3. The present invention limits the bearing outer ring through the fixture and the auxiliary clamping device, ensuring good fixation during grinding and no displacement during grinding. When the deep grinding mode is deepened, the auxiliary clamping device can reinforce the bearing outer ring, making the grinding accuracy high and the outer ring meet the use requirements.

[0021] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments, and features, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1It is a schematic structural diagram of the present invention;

[0024] Figure 2 It is a schematic internal installation diagram of the present invention;

[0025] Figure 3 It is a schematic structural diagram when the outer ring of the bearing of the present invention is polished;

[0026] Figure 4 It is a schematic structural diagram of the inner ring polishing mechanism of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the synchronous adjustment device of the present invention;

[0028] Figure 6 It is an exploded view of the fixture of the present invention;

[0029] Figure 7 It is a schematic internal structure diagram of the base of the present invention;

[0030] Figure 8 It is a schematic internal structure diagram of the adjusting cylinder of the present invention;

[0031] Figure 9 It is a top view of the outer ring polishing mechanism of the present invention;

[0032] Figure 10 It is the present invention Figure 9 A - A sectional view;

[0033] Figure 11 It is the present invention Figure 10 schematic structural diagram;

[0034] Figure 12 It is the present invention Figure 9 B - B sectional structural schematic diagram.

[0035] As shown in the figure: 1. Machine tool main body; 2. Synchronous adjustment device; 201. Driven shaft; 202. First driven sprocket; 203. Second driven sprocket; 204. Third driven sprocket; 205. Slave pulley; 206. Fixed wheel; 3. Telescopic cylinder; 4. Inner ring grinding mechanism; 401. Connecting column; 402. Driving sprocket; 403. Driving chain; 404. Fixed shaft; 405. Connecting plate; 406. Connecting frame; 407. Inner ring grinding wheel; 408. Fine-tuning motor; 5. Outer ring grinding mechanism; 501. Grinding shell; 502. Outer ring grinding wheel; 503. Telescopic rod; 504. Pushing block; 505. Blocking block; 506. C-shaped grinding frame; 507. First fixing plate; 6. Bracket; 7. Fixture; 701. Base; 702. First piston cylinder; 703. Groove; 704. Chamber; 705. First piston; 706. Support column; 707. Annular piston; 708. Second fixing plate; 709. Guide post; 710. Limit ring; 711. First rolling wheel; 712. Second rolling wheel; 8. Auxiliary clamping device; 801. Moving shaft; 802. Third piston; 803. Adjusting cylinder; 804. Sealing chamber; 805. Connecting block; 806. Moving groove; 807. Connecting groove; 808. Fourth piston; 809. Moving block; 810. Sphere; 811. Second piston cylinder; 812. Fifth piston; 813. Limit block; 814. Moving slot; 9. Driving motor; 10. Fixed bracket; 11. Bearing outer ring; 12. Slide groove; 13. Moving column; 14. Return spring. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.

[0037] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0038] The present invention will be further described in detail below in combination with the full text.

[0039] Combined with the attached Figures 1 - 12, An internal and external automatic grinding machine for the outer ring of a bearing, comprising a machine tool main body 1, a bracket 6 adjusted within the machine tool main body 1, and a telescopic cylinder 3 fixedly connected to the machine tool main body 1. An inner ring grinding mechanism 4 and an outer ring grinding mechanism 5 for grinding the outer ring 11 of the bearing are installed on the bracket 6. A driving motor 9 for driving the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 to rotate and grind is installed on the bracket 6. The upper end of the connecting column 401 is connected to the output end of the driving motor 9. A fixed bracket 10 is bolted to one side of the driving motor 9. The telescopic end of the telescopic cylinder 3 is connected to the fixed bracket 10. When the telescopic cylinder 3 operates, it drives the driving motor 9 on one side of the fixed bracket 10 to move downward closer to or away from the outer ring 11 of the bearing. The driving motor 9 drives the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 to rotate to grind the inner and outer sides of the outer ring 11 of the bearing.

[0040] When the present invention is specifically implemented, such as Figure 3 , Figure 4 and Figure 5As shown in the figure, the inner ring grinding mechanism 4 includes a connecting column 401 rotatably connected to a bracket 6, three sets of driving sprockets 402 and driving chains 403. The driving chains 403 are wound around the outside of the three sets of driving sprockets 402 to form an equilateral triangle. The connecting column 401 is connected to the bracket 6 through a bearing. Fixed shafts 404 are installed on each of the three sets of driving sprockets 402. The fixed shafts 404 are fixedly connected to the driving sprockets 402. The upper and lower ends of the fixed shafts 404 are connected to a connecting plate 405 through bearings, and the other end of the connecting plate 405 is fixedly connected to the connecting column 401. Specifically, one side of the connecting plate 405 is connected to the connecting column 401. The upper and lower ends of the fixed shafts 404 are rotatably connected between the two connecting plates 405 through bearings, so that the driving sprockets 402 and the fixed shafts 404 rotate on the connecting plate 405, and the connecting plate 405 is provided in three sets to match the three sets of driving sprockets 402. A connecting frame 406 is installed on the outside of the fixed shaft 404, and a rotatable inner ring grinding wheel 407 is installed on the connecting frame 406. The inner ring grinding wheel 407 can be connected to the connecting frame 406 through a shaft and a bearing. The rotation of the driving sprocket 402 can drive the connecting frame 406 to adjust, so that the inner ring grinding wheel 407 approaches or moves away from the inner side of the bearing outer ring 11. A fine-tuning motor 408 is bolted to the bracket 6, and one side of the fine-tuning motor 408 is connected to the connecting plate 405. Both the bracket 6 and the connecting plate 405 are fixedly connected to the fine-tuning motor 408 through a motor bracket and bolts. The rotation end of the fine-tuning motor 408 connected to one of the fixed shafts 404 drives the driving sprocket 402 to rotate, driving the inner ring grinding wheel 407 to approach or move away from the bearing outer ring 11. The output end of the fine-tuning motor 408 can penetrate the connecting plate 405 (or be connected to the connecting plate 405 through a bearing) and be connected to the fixed shaft 404. The fine-tuning motor 408 is a prior art and will not be elaborated here. It can be controlled by a controller to rotate and rotate in the reverse direction. The rotation speed of the fine-tuning motor 408 is very slow and belongs to angular adjustment rotation. The output end of the fine-tuning motor 408 can drive the fixed shaft 404 to rotate, drive the fixed shaft 404 to rotate and adjust, and drive the inner ring grinding wheel 407 to approach or move away from the bearing outer ring 11 through the connecting frame 406.

[0041] Specifically, the number of the inner ring grinding wheels 407 and the outer ring grinding wheels 502 is correspondingly set, and both are provided in three sets. An equilateral triangle structure is formed between the three sets of driving sprockets 402.

[0042] When the present invention is specifically implemented, such as Figure 3 、 Figure 9 、 Figure 10 and Figure 11As shown in the figure, the outer ring grinding mechanism 5 includes a grinding shell 501 and an outer ring grinding wheel 502. A C-shaped grinding frame 506 is slidably connected inside the grinding shell 501, and the outer ring grinding wheel 502 is rotatably connected inside the C-shaped grinding frame 506 through bearings. The outer ring grinding wheel 502 is connected inside the C-shaped grinding frame 506 through a shaft and bearings, and the outer ring grinding wheel 502 protrudes outward. The outer ring grinding wheel 502 extends to the outside of the grinding shell 501 and can rotate to grind the outer ring of the bearing outer ring 11. A telescopic rod 503 is installed inside the grinding shell 501. A push block 504 is installed at the telescopic end of the telescopic rod 503. A blocking block 505 is installed at the lower end of the C-shaped grinding frame 506, and the blocking block 505 is located inside the push block 504. The push block 504 and the blocking block 505 are movably connected. When the telescopic rod 503 is specifically used, in order to cooperate with the synchronous adjustment device 2, it does not directly push the outer ring grinding wheel 502 to move, but plays a role in limiting and supporting the C-shaped grinding frame 506 and the outer ring grinding wheel 502. A first fixing plate 507 is installed between the bracket 6 and the grinding shell 501. The first fixing plate 507 is connected to the bracket 6. The bracket 6 drives rotation through the connecting column 401, thereby driving the outer ring grinding wheel 502 to rotate to grind the outer ring of the bearing outer ring 11.

[0043] When the present invention is specifically implemented, as Figure 3 , Figure 4 and 5 shown, a synchronous adjustment device 2 for synchronously adjusting the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 to approach or move away from the bearing outer ring 11 is installed on the bracket 6. The synchronous adjustment device 2 includes a driven shaft 201 of the bearing connecting bracket 6, first driven sprockets 202 installed at both ends of the driven shaft 201, and a second driven sprocket 203 connected to the outside of the connecting column 401 through a bearing. A third driven sprocket 204 is connected to the lower end of the driving sprocket 402. The two first driven sprockets 202 are respectively connected to the second driven sprocket 203 and the driving sprocket 402 through chains. A slave pulley 205 is installed at the lower end of the second driven sprocket 203. Specifically, the slave pulley 205 is sleeved or connected to the connecting column 401 through a bearing, so that the slave pulley 205 can rotate on the outside of the connecting column 401 under the pulling of an external force. A slider is installed on the C-shaped grinding frame 506, and a fixed wheel 206 is fixedly connected to the slider. The slave pulley 205 and the fixed wheel 206 are connected through a rope. When the slave pulley 205 rotates under the drive of an external force, it can drive the fixed wheel 206 to move through the rope. One of the connecting plates 405 extends to the driven shaft 201. The driven shaft 201 is connected to the connecting plate 405 through a bearing. The connecting plate 405 and the bracket 6 can limit the driven shaft 201. The driven shaft 201 can rotate on the connecting plate 405 and the bracket 6 through a bearing, drive the first driven sprocket 202 and the second driven sprocket 203 to rotate, and thus drive the slave pulley 205 to rotate and pull through the rope. The fixed wheel 206 slides on the grinding shell 501, so that the outer ring grinding wheel 502 approaches the bearing outer ring 11.

[0044] Specifically, a chute 12 for cooperating with the slider is provided on the polishing shell 501. The rope pulls the C-shaped polishing frame 506 to slide in the chute 12 through the slider. The telescopic rod 503 extends to adjust the auxiliary support and limit. The return spring 14 extends. When the external force on the rope is lost, the telescopic rod 503 resets, and the contraction of the return spring 14 drives the C-shaped polishing frame 506 to reset away from the outer ring 11 of the bearing. A moving column 13 is installed on one side of the C-shaped polishing frame 506 and the moving column 13 penetrates through the polishing shell 501. A moving hole for cooperating with the movement of the moving column 13 is provided on the C-shaped polishing frame 506. A return spring 14 is installed outside the moving column 13 and between the polishing shell 501 and the C-shaped polishing frame 506.

[0045] The effect of the synchronous adjustment device 2 is as follows:

[0046] The fine adjustment motor 408, as a driving source, drives the driving sprocket 402 to rotate for fine adjustment, and drives the inner ring grinding wheel 407 to approach the outer ring 11 of the bearing through the connecting frame 406. Since the driving sprocket 402 is connected to the third driven sprocket 204, the third driven sprocket 204 can be driven to rotate. The second driven sprocket 203 is driven to rotate for fine adjustment through the driven shaft 201, the first driven sprocket 202 and the chain, so as to drive the driven pulley 205 to rotate and pull the fixed pulley 206 to slide on the polishing shell 501 through the rope, so that the outer ring grinding wheel 502 approaches the outer ring 11 of the bearing.

[0047] When the present invention is specifically implemented, such as Figure 5 、 Figure 6 、 Figure 7 and Figure 12As shown in the figure, a fixture 7 for clamping the upper and lower ends of the bearing outer ring 11 is installed inside the machine tool main body 1. The fixture 7 includes a base 701 installed inside the machine tool main body 1 and a first piston cylinder 702 uniformly arranged on the base 701. A groove 703 and a chamber 704 communicating with the first piston cylinder 702 are formed inside the upper end of the base 701. A first piston 705 is installed inside the first piston cylinder 702. A support column 706 that abuts against the bearing outer ring 11 is installed on the first piston 705. A movable annular piston 707 is installed inside the groove 703. The groove 703 area at the lower end of the annular piston 707 and the chamber 704 area at the lower end of the first piston 705 form a sealed area. The sealed area can be sealed gas or sealed liquid. When the bearing outer ring 11 is placed on the support column 706 and is subjected to an external force and moves downward, the first piston 705 moves downward, driving the annular piston 707 to move upward through the sealed gas or sealed liquid in the sealed area. The movements of the annular piston 707 and the first piston 705 are mutual. Multiple groups of second fixing plates 708 are installed on the outer side of the bracket 6. A guide post 709 is installed at the lower end of the second fixing plate 708. A limit ring 710 is installed at the lower end of the guide post 709 and the limit ring 710 extends into the groove 703. A first rolling wheel 711 that abuts against the annular piston 707 is installed at the lower end of the limit ring 710. A second rolling wheel 712 that abuts against the upper end of the bearing outer ring 11 is installed at the lower end of the second fixing plate 708.

[0048] Under normal circumstances, the first rolling wheel 711 and the second rolling wheel 712 approach the bearing outer ring 11 and the annular piston 707 under the drive of the telescopic cylinder 3 to limit the acting force on the annular piston 707 and the bearing outer ring 11. Driven by the drive motor 9, the first rolling wheel 711 and the second rolling wheel 712 rotate and move on the upper ends of the annular piston 707 and the bearing outer ring 11. The first rolling wheel 711 abuts against the annular piston 707, and the second rolling wheel 712 abuts against the upper end of the bearing outer ring 11. The lower end of the bearing outer ring 11 is supported by the support column 706, so that the bearing outer ring 11 will not be displaced during grinding.

[0049] When the present invention is specifically implemented, such as Figure 7 、 Figure 8 and Figure 12As shown in the figure, an auxiliary clamping device 8 for assisting the clamp 7 to clamp is installed on the inner ring grinding mechanism 4. The auxiliary clamping device 8 includes a moving shaft 801, a third piston 802 outside the moving shaft 801, and an adjusting cylinder 803. A sealing cavity 804 for the third piston 802 to move is provided in the adjusting cylinder 803. The moving shaft 801 penetrates the adjusting cylinder 803 and can move on the adjusting cylinder 803. The moving shaft 801 can be driven by the driving chain 403 to move, thereby driving the third piston 802 to move in the sealing cavity 804. The moving groove 806 and the sealing cavity 804 area between the fourth piston 808 and the third piston 802 are sealing areas, and the sealing areas can be sealed gas or sealed liquid. The middle of the driving chain 403 is disconnected and the two ends are respectively connected to the two ends of the moving shaft 801. A connecting block 805 is installed between the adjusting cylinder 803 and the connecting column 401. A moving groove 806 is provided inside the lower end of the connecting column 401. A communicating groove 807 is provided in the connecting block 805, and the communicating groove 807 communicates the moving groove 806 and the sealing cavity 804. A fourth piston 808 is installed in the moving groove 806 and below the communicating groove 807. A moving block 809 is installed at the lower end of the fourth piston 808. The moving block 809 extends to the outside of the lower end of the connecting column 401. A sphere 810 is movably connected to the lower end of the moving block 809. A ball groove is provided at the lower end of the moving block 809, and the sphere 810 can rotate in the ball groove. Most of the sphere 810 is located in the ball groove. A second piston cylinder 811 and a fifth piston 812 in the second piston cylinder 811 are installed at the center of the base 701. A limiting block 813 is installed on the fifth piston 812. A moving groove 814 for the sphere 810 to cooperate with is provided at the upper end of the limiting block 813. The bottom of the lower end of the second piston cylinder 811 is communicated with the first piston cylinder 702 through a pipeline. Driven by the telescopic cylinder 3, the sphere 810 falls into the moving groove 814, and the fifth piston 812 is driven by the limiting block 813 to move downward in the second piston cylinder 811, compressing the sealed gas or sealed liquid below the second piston cylinder 811. Through the pipeline connection chamber 704, the first piston 705 or the annular piston 707 moves upward.

[0050] Specifically, piston rings are installed on the outer sides of the first piston 705, the second piston cylinder 811, the third piston 802, the fourth piston 808, the fifth piston 812, and the annular piston 707, which can achieve a sealed moving effect and prevent gas or liquid from flowing out.

[0051] The interlocking seal of the clamp 7 and the auxiliary clamping device 8 has three effects (three machine tool modes):

[0052] 1. Positioning mode: When the telescopic cylinder 3 extends to drive the clamp 7 and the auxiliary clamping device 8 on the bracket 6 to approach the outer ring 11 of the bearing, the sphere 810 of the auxiliary clamping device 8 will fall into the moving groove 814 of the limiting block 813, achieving the positioning effect;

[0053] 2. Initial grinding mode: When the first rolling wheel 711 abuts against the annular piston 707, the second rolling wheel 712 abuts against the upper end of the outer ring 11 of the bearing, and the support column 706 abuts against the lower end of the outer ring 11 of the bearing, initial positioning is achieved. At this time, the outer ring 11 of the bearing is clamped by the fixture 7 and the auxiliary clamping device 8. Driven by the driving motor 9, the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 grind the inner and outer rings of the outer ring 11 of the bearing;

[0054] 3. Deepening grinding mode: After the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 have ground the outer ring 11 of the bearing for a period of time and the grinding requirements have not been met, when it is necessary to continue grinding the outer ring 11 of the bearing, the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 are driven by the synchronous adjustment device 2 to approach the outer ring 11 of the bearing. At this time, the frictional force increases, which will affect the fixing effect of the outer ring 11 of the bearing. The present invention designs an auxiliary clamping device 8. When the synchronous adjustment device 2 drives and adjusts the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5, the third piston 802 is simultaneously driven to move in the sealing cavity 804, compressing the sealed gas or sealed liquid, which is connected to the cavity 704 through a pipeline, so that the sealed gas or sealed liquid in the sealed area of the cavity 704 changes, and the first piston 705 or the annular piston 707 is pushed to move upward, thereby realizing further clamping of the outer ring 11 of the bearing.

[0055] Specifically, the telescopic cylinder 3 remains in the extended state in the initial grinding mode and the deepening grinding mode, always maintaining the distance in the positioning mode. The positioning mode and the initial grinding mode limit the outer ring 11 of the bearing by the extension of the telescopic cylinder 3, and the deepening grinding mode further limits the outer ring 11 of the bearing by the auxiliary clamping device 8.

[0056] The working principle of the present invention:

[0057] Open the main body of the machine tool 1, place the outer ring of the bearing 11 on the support column 706. The telescopic cylinder 3 extends to drive the fixture 7 and the auxiliary clamping device 8 on the bracket 6 to approach the outer ring of the bearing 11. The limit ring 710 enters the groove 703, and the sphere 810 of the auxiliary clamping device 8 falls into the movable groove 814 of the limit block 813. The first rolling wheel 711 abuts against the annular piston 707, and the second rolling wheel 712 abuts against the upper end of the outer ring of the bearing 11 to clamp the outer ring of the bearing 11. At the same time, the output end of the fine-tuning motor 408 drives the fixed shaft 404 to rotate, driving the fixed shaft 404 to rotate and adjust, driving the inner ring grinding wheel 407 to approach the outer ring of the bearing 11. The driving sprocket 402 drives the third driven sprocket 204 to rotate. Through the driven shaft 201 and the first driven sprocket 202, the second driven sprocket 203 is driven to rotate and fine-tune, thereby driving the follower pulley 205 to rotate and pulling through the rope. The fixed wheel 206 slides on the grinding shell 501, making the outer ring grinding wheel 502 approach the outer ring of the bearing 11. The return spring 14 is stretched. At this time, it is the preliminary grinding mode. Driven by the driving motor 9, the first rolling wheel 711 rotates on the annular piston 707, and the second rolling wheel 712 rotates on the outer ring of the bearing 11, so that the outer ring of the bearing 11 will not be displaced during grinding. At the same time, it drives the outer ring grinding wheel 502 and the inner ring grinding wheel 407 to rotate to grind the inner and outer rings of the outer ring of the bearing 11;

[0058] When the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 grind the outer ring of the bearing 11 for a period of time and have not reached the grinding requirements and need to continue grinding the outer ring of the bearing 11, the inner ring grinding mechanism 4 and the outer ring grinding mechanism 5 are driven and adjusted to approach the outer ring of the bearing 11 through the synchronous adjustment device 2. At this time, the friction force increases, which will affect the fixing effect of the outer ring of the bearing 11. The present invention designs an auxiliary clamping device 8. By moving the third piston 802 in the sealing cavity 804, the sealed gas or sealed liquid is compressed and connected to the chamber 704 through a pipeline, so that the sealed gas or sealed liquid in the sealed area of the chamber 704 changes, which will push the first piston 705 or the annular piston 707 to move upward, thereby realizing further clamping of the outer ring of the bearing 11. At this time, it is the deepening grinding mode. Driven by the driving motor 9, it drives the outer ring grinding wheel 502 and the inner ring grinding wheel 407 to rotate to deepen the grinding of the inner and outer rings of the outer ring of the bearing 11, so that the outer ring of the bearing 11 meets the finished product requirements.

[0059] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown throughout the text is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present invention.

Claims

1. A machine tool for automatically grinding the inner and outer surfaces of a bearing outer ring, comprising a machine tool body (1), a bracket (6) adjustable in the machine tool body (1), and a telescopic cylinder (3) fixedly connected to the machine tool body (1), characterized in that: The bracket (6) is provided with an inner ring grinding mechanism (4) and an outer ring grinding mechanism (5) for grinding the outer ring (11) of the bearing; The bracket (6) is provided with a synchronous adjustment device (2) for synchronously adjusting the inner ring grinding mechanism (4) and the outer ring grinding mechanism (5) to be close to or away from the bearing outer ring (11); A clamp (7) for clamping the upper and lower ends of the bearing outer ring (11) is installed in the machine tool body (1); The inner ring grinding mechanism (4) is provided with an auxiliary clamping device (8) for assisting the clamping of the clamp (7); The bracket (6) is provided with a driving motor (9) for driving the inner ring grinding mechanism (4) and the outer ring grinding mechanism (5) to rotate and grind. A fixed bracket (10) is bolted to one side of the driving motor (9). The telescopic end of the telescopic cylinder (3) is connected to the fixed bracket (10). The inner ring grinding mechanism (4) comprises a connecting column (401) rotatably connected to a bracket (6), three sets of driving sprockets (402) and a driving chain (403); The fixture (7) comprises a base (701) installed in the machine tool body (1) and a first piston cylinder (702) evenly arranged on the base (701); a groove (703) and a chamber (704) connected to the first piston cylinder (702) are provided on the inner side of the upper end of the base (701); a first piston (705) is installed in the first piston cylinder (702); a support column (706) is installed on the first piston (705) to abut against the outer ring (11) of the bearing; a movable annular piston (707) is installed in the groove (703) ), a plurality of groups of second fixing plates (708) are installed on the outer side of the bracket (6), a guide column (709) is installed at the lower end of the second fixing plate (708), a limiting ring (710) is installed at the lower end of the guide column (709), and the limiting ring (710) can extend into the groove (703), a first rolling wheel (711) is installed at the lower end of the limiting ring (710) to abut against the annular piston (707), and a second rolling wheel (712) is installed at the lower end of the second fixing plate (708) to abut against the upper end of the bearing outer ring (11); The auxiliary clamping device (8) comprises a movable shaft (801), a third piston (802) outside the movable shaft (801) and an adjusting cylinder (803); a sealed chamber (804) is provided in the adjusting cylinder (803) for cooperating with the movement of the third piston (802); the movable shaft (801) passes through the adjusting cylinder (803) and can move on the adjusting cylinder (803); the active chain (403) is disconnected in the middle and its two ends are respectively connected to the two ends of the movable shaft (801); the adjusting cylinder (803) and the connecting column (401) are connected to each other. A connecting block (805) is installed between the connecting column (401), a movable groove (806) is provided on the inner side of the lower end of the connecting column (401), a connecting groove (807) is provided in the connecting block (805), and the connecting groove (807) is connected with the movable groove (806) and the sealing cavity (804), a fourth piston (808) is installed in the movable groove (806) and below the connecting groove (807), a movable block (809) is installed at the lower end of the fourth piston (808), and a ball (810) is movably connected to the lower end of the movable block (809); A second piston cylinder (811) and a fifth piston (812) in the second piston cylinder (811) are installed at the center of the base (701); a limit block (813) is installed on the fifth piston (812); a movable groove (814) for cooperating with the ball (810) is provided at the upper end of the limit block (813); and the bottom of the lower end of the second piston cylinder (811) is connected to the first piston cylinder (702) through a pipeline.

2. According to claim 1, a machine tool for automatically grinding the inner and outer sides of a bearing outer ring, characterized in that: The driving chain (403) is wound around the outside of the three groups of driving sprockets (402), and the three groups of driving sprockets (402) are all equipped with fixed shafts (404). The upper and lower ends of the fixed shaft (404) are provided with connecting plates (405) through bearings, and the other end of the connecting plate (405) is fixedly connected to the connecting column (401). The outside of the fixed shaft (404) is equipped with a connecting frame (406), and a rotatable inner ring grinding wheel is installed on the connecting frame (406). The bracket (6) is bolted with a fine-tuning motor (408) and one side of the fine-tuning motor (408) is connected to a connecting plate (405), one of the fixed shafts (404) is connected to the rotating end of the fine-tuning motor (408), and the fine-tuning motor (408) drives the driving sprocket (402) to rotate and drive the inner ring grinding wheel (407) to approach or move away from the bearing outer ring (11), and the upper end of the connecting column (401) is connected to the output end of the driving motor (9).

3. The automatic inner and outer grinding machine for the outer ring of a bearing according to claim 2, characterized in that: The outer ring grinding mechanism (5) comprises a grinding shell (501) and an outer ring grinding wheel (502); a C-shaped grinding frame (506) is slidably connected inside the grinding shell (501), and the outer ring grinding wheel (502) is rotatably connected inside the C-shaped grinding frame (506) via a bearing; a telescopic rod (503) is installed inside the grinding shell (501), a push block (504) is installed at the telescopic end of the telescopic rod (503); a blocking block (505) is installed at the lower end of the C-shaped grinding frame (506), and the blocking block (505) is located inside the push block (504); and a first fixing plate (507) is installed between the bracket (6) and the grinding shell (501).

4. The automatic inner and outer grinding machine tool for the outer ring of a bearing according to claim 3, characterized in that: The synchronous adjustment device (2) comprises a driven shaft (201) of a bearing-connected bracket (6), a first driven sprocket (202) mounted at both ends of the driven shaft (201) and a second driven sprocket (203) connected to the outside of a connecting column (401) through a bearing, a third driven sprocket (204) is connected to the lower end of the driving sprocket (402), the two first driven sprockets (202) are respectively connected to the second driven sprocket (203) and the driving sprocket (402) through a chain, a slave pulley (205) is mounted at the lower end of the second driven sprocket (203), a slider is mounted on the C-shaped grinding frame (506), a fixed wheel (206) is fixedly connected to the slider, and the slave pulley (205) and the fixed wheel (206) are connected through a rope.

5. The automatic inner and outer grinding machine for the outer ring of a bearing according to claim 4, characterized in that: The grinding shell (501) is provided with a slide groove (12) for use with a slider, a movable column (13) is installed on one side of the C-shaped grinding frame (506), and the movable column (13) passes through the grinding shell (501), and a return spring (14) is installed on the outer side of the movable column (13) and between the grinding shell (501) and the C-shaped grinding frame (506).

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