A shot blasting machine for bearing rings

Abstract

The utility model relates to a throw -in cleaning machine technical field, the utility model provides a kind of throw -in cleaning machine for bearing ring, including processing bin, the processing bin top is equipped with feeding mechanism, the processing bin rear end outer wall is embedded and is fixedly installed with throw -in machine body, the processing bin inside is fixedly installed with throw -in hopper, the throw -in hopper bottom is equipped with anti -blocking mechanism;Support, the support is fixedly installed on the left outer wall of the processing bin, dust extraction mechanism is equipped on the support, and the dust extraction mechanism includes dust extraction fan, dust collection box, dust extraction cover, first connecting pipe and second connecting pipe, dust extraction fan is fixedly installed on the support top, dust collection box is fixedly installed on the support top and located the rear end of dust extraction fan. By the above technical scheme, the technical problems of dust pollution, throw -in discharge blockage and uneven workpiece throw -in in the bearing ring throw -in cleaning process are solved.

Description

Technical Field

[0001] This utility model relates to the field of shot blasting machine technology, specifically to a shot blasting machine for bearing rings. Background Technology

[0002] In the production and processing of bearing rings, shot blasting is a key process to improve their surface quality, removing impurities such as oxide scale and burrs from the surface through high-speed shot impact.

[0003] However, most existing shot blasting machines for bearing rings are not convenient for handling the large amount of metal shavings, shot wear particles, and other dust generated during use. This not only pollutes the workshop environment and endangers the health of operators, but may also adhere to equipment parts and affect operational accuracy. In addition, in many machines, the workpieces are mostly fixed, and the shot cannot fully cover the surface of the workpiece (especially the inner side of the ring, corners, etc.), which easily leads to cleaning dead corners, affecting the consistency of surface treatment, and may in turn affect the subsequent assembly and performance of the bearing rings. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a shot blasting machine for bearing rings, which solves the technical problems of dust pollution, shot blasting blockage, and uneven shot blasting of workpieces during the shot blasting process of bearing rings.

[0005] According to one aspect, at least one embodiment of the present invention provides a shot blasting cleaning machine for bearing rings, comprising: a processing chamber, a feeding mechanism installed at the top of the processing chamber, a shot blasting machine body embedded and fixedly installed on the outer wall of the rear end of the processing chamber, a shot blasting hopper fixedly installed inside the processing chamber, and an anti-blocking mechanism installed at the bottom end of the shot blasting hopper; A bracket is fixedly installed on the outer left wall of the processing chamber. A dust collection mechanism is mounted on the bracket, which includes a dust collection fan, a dust collection box, a dust collection hood, a first connecting pipe, and a second connecting pipe. The dust collection fan is fixedly installed at the top of the bracket, and the dust collection box is fixedly installed at the rear end of the dust collection fan. The dust collection hood is embedded and fixedly installed on the outer left wall of the processing chamber. The input end of the dust collection fan is sealed to the first connecting pipe, which is sealed to the dust collection hood. The output end of the dust collection fan is sealed to the second connecting pipe, and the other end of the second connecting pipe extends into the dust collection box.

[0006] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings is provided, which further includes a protective net fixedly installed inside the dust collection hood.

[0007] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings further includes: the feeding mechanism includes mounting strips, grooves, threaded rods, toothed pulleys, toothed synchronous belts, a first motor, and a mounting plate; mounting strips are fixedly installed at the two edges of the top of the processing chamber; grooves are longitudinally formed on the sides of the mounting strips that are close to each other; threaded rods are rotatably installed inside the two sets of grooves; toothed pulleys are fixedly installed at the rear ends of the two sets of threaded rods; a toothed synchronous belt is installed between the two sets of toothed pulleys and is connected by transmission through the toothed synchronous belt; a first motor is fixedly installed on the outer wall of the rear end of the processing chamber; the output end of the first motor is fixedly connected to one of the sets of threaded rods; a mounting plate is provided at the top of the processing chamber; both sides of the mounting plate are slidably connected to the grooves at corresponding positions and are threadedly connected to the threaded rods at corresponding positions.

[0008] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings is provided, which further includes: the feeding mechanism includes an installation groove, a fitting groove, an installation block, a turntable, a second motor, a vertical rod, and hooks; the top of the processing chamber is provided with an installation groove; the inner walls on both sides of the installation groove are provided with fitting grooves longitudinally; the bottom of the installation plate is fixedly installed with an installation block at a position corresponding to the installation groove; both sides of the installation block are slidably connected to the fitting grooves at corresponding positions; the bottom of the installation block is rotatably installed with a turntable; the bottom of the turntable is fixedly installed with a vertical rod; several sets of hooks are fixedly installed on the vertical rod; the top of the installation plate is fixedly installed with a second motor; and the output end of the second motor is fixedly connected to the turntable.

[0009] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings is provided, which further includes: the anti-blocking mechanism includes a feeding pipe, a rotating shaft, a spiral auger, a third motor, and a feeding port; a collection box is fixedly installed at the bottom of the right outer wall of the processing chamber; the feeding pipe is inclinedly arranged at the bottom of the processing chamber; the right side of the feeding pipe extends into the collection box; a feeding port is opened at the right edge of the bottom end of the feeding pipe; the bottom end of the shot blasting hopper is connected to the feeding pipe; a rotating shaft is rotatably installed inside the feeding pipe; a spiral auger is fixedly installed on the rotating shaft; a third motor is fixedly installed on the left outer wall of the feeding pipe; and the output end of the third motor is fixedly connected to the rotating shaft.

[0010] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings is provided, which further includes: the first motor is a self-locking motor, and the second motor and the third motor are both servo motors.

[0011] For example, in at least one embodiment of the present invention, a shot blasting machine for bearing rings is further comprising: a door rotatably mounted at the left edge of the front end of the processing chamber; a handle fixedly mounted on the outer wall of the front end of the door; a first fixing block fixedly mounted on the outer wall of the right side of the door; a second fixing block fixedly mounted on the outer wall of the right side of the processing chamber at a position corresponding to the first fixing block; a limit rod vertically and slidably mounted on the second fixing block; a connecting plate fixedly mounted on the top of the limit rod; a pull ring fixedly mounted on the top of the connecting plate; a spring sleeved on the limit rod; the top of the spring fixedly connected to the connecting plate; the bottom of the spring fixedly connected to the second fixing block; and a limiting hole matching the limit rod being opened on the first fixing block at a position corresponding to the limit rod.

[0012] For example, in a shot blasting machine for bearing rings provided in at least one embodiment of the present invention, a support pad is fixedly installed at each of the four corners of the bottom of the processing chamber, and a PLC controller is fixedly installed on the outer wall of the left side of the processing chamber.

[0013] The beneficial effects of the embodiments of this utility model are as follows: 1. In this device, the dust extraction mechanism enables continuous extraction of dust from the shot blasting area, thereby significantly reducing the dust concentration in the workshop, protecting the health of operators, reducing dust erosion on equipment, and extending the service life of the equipment.

[0014] 2. In this device, the feeding mechanism drives the workpiece to rotate, allowing the shot to impact all surfaces of the workpiece comprehensively, eliminating dead corners in cleaning, improving the consistency of bearing ring surface treatment, and ensuring subsequent processing and performance.

[0015] 3. In this device, the anti-blocking mechanism effectively prevents the shot from clogging in the feed pipe, ensuring smooth shot blasting circulation, reducing downtime for unblocking, improving equipment efficiency, and reducing manual maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a shot blasting machine for bearing rings in one embodiment of the present invention; Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This utility model Figure 1 Enlarged structural diagram at point B; Figure 4 This is a schematic cross-sectional view of the present invention. Figure 5 This utility model Figure 4 Enlarged structural diagram at point C; Figure 6 This is a schematic diagram of the structure of this utility model from below; Figure 7 This is a schematic diagram of the rear view structure of this utility model.

[0018] In the diagram: 1. Processing chamber; 2. Mounting strip; 3. Slide groove; 4. Threaded rod; 5. Toothed pulley; 6. Toothed synchronous belt; 7. First motor; 8. Mounting plate; 9. Mounting groove; 10. Fitting groove; 11. Mounting block; 12. Turntable; 13. Second motor; 14. Vertical rod; 15. Hook; 16. Shot blasting machine body; 17. Collection box; 18. Shot blasting discharge hopper; 19. Discharge pipe; 20. Rotating shaft; 21. Spiral auger; 2 2. Third motor; 23. Feed port; 24. Bracket; 25. Dust extraction fan; 26. Dust collection box; 27. Dust extraction hood; 28. Protective net; 29. ​​First connecting pipe; 30. Second connecting pipe; 31. Door; 32. Handle; 33. First fixing block; 34. Second fixing block; 35. Limiting rod; 36. Connecting plate; 37. Pull ring; 38. Spring; 39. Limiting hole; 40. Support pad; 41. PLC controller. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0019] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1 to 7 As shown, it illustrates a shot blasting machine for bearing rings in one embodiment of the present invention, comprising: a processing chamber 1, a feeding mechanism installed at the top of the processing chamber 1, a shot blasting machine body 16 embedded and fixedly installed on the outer wall of the rear end of the processing chamber 1, a shot blasting hopper 18 fixedly installed inside the processing chamber 1, and an anti-blocking mechanism installed at the bottom of the shot blasting hopper 18. A bracket 24 is fixedly installed on the left outer wall of the processing chamber 1. A dust collection mechanism is installed on the bracket 24, which includes a dust collection fan 25, a dust collection box 26, a dust collection hood 27, a first connecting pipe 29, and a second connecting pipe 30. The dust collection fan 25 is fixedly installed at the top of the bracket 24, and the dust collection box 26 is fixedly installed at the rear end of the dust collection fan 25. The dust collection hood 27 is embedded and fixedly installed on the left outer wall of the processing chamber 1. The input end of the dust collection fan 25 is sealed to the first connecting pipe 29, which is sealed to the dust collection hood 27. The output end of the dust collection fan 25 is sealed to the second connecting pipe 30, and the other end of the second connecting pipe 30 extends into the dust collection box 26. A protective net 28 is fixedly installed inside the dust collection hood 27.

[0025] The dust extraction mechanism enables continuous suction of dust from the shot blasting area, significantly reducing dust concentration in the workshop, protecting the health of operators, reducing dust erosion of equipment, and extending equipment lifespan. Furthermore, the installation of a protective net 28 inside the dust extraction hood 27 effectively prevents large particles such as those from shot blasting from entering the hood, thus ensuring the normal operation of the dust extraction fan 25 and reducing damage caused by larger particles.

[0026] For example, such as Figure 1 As shown, the feeding mechanism includes mounting strips 2, grooves 3, threaded rods 4, toothed pulleys 5, toothed synchronous belts 6, a first motor 7, and a mounting plate 8. Mounting strips 2 are fixedly installed at the two edges of the top of the processing chamber 1. Grooves 3 are longitudinally opened on the side of the mounting strips 2 that are close to each other. Threaded rods 4 are rotatably installed inside the two sets of grooves 3. The toothed pulleys 5 are fixedly installed at the rear ends of the two sets of threaded rods 4. A toothed synchronous belt 6 is installed between the two sets of toothed pulleys 5 and is connected by transmission through the toothed synchronous belt 6. The first motor 7 is fixedly installed on the outer wall of the rear end of the processing chamber 1. The output end of the first motor 7 is fixedly connected to one of the sets of threaded rods 4. A mounting plate 8 is provided at the top of the processing chamber 1. Both sides of the mounting plate 8 are slidably connected to the grooves 3 at the corresponding positions and are threadedly connected to the threaded rods 4 at the corresponding positions.

[0027] For example, such as Figure 1As shown, the feeding mechanism also includes a mounting groove 9, a fitting groove 10, a mounting block 11, a turntable 12, a second motor 13, a vertical rod 14, and hooks 15. The top of the processing chamber 1 has a mounting groove 9, and the inner walls on both sides of the mounting groove 9 have longitudinally formed fitting grooves 10. The bottom of the mounting plate 8 is fixedly mounted with a mounting block 11 at the corresponding position of the mounting groove 9. Both sides of the mounting block 11 are slidably connected to the fitting grooves 10 at the corresponding positions. The bottom of the mounting block 11 is rotatably mounted with a turntable 12, and the bottom of the turntable 12 is fixedly mounted with a vertical rod 14. Several sets of hooks 15 are fixedly mounted on the vertical rod 14. The top of the mounting plate 8 is fixedly mounted with a second motor 13, and the output end of the second motor 13 is fixedly connected to the turntable 12. The first motor 7 is a self-locking motor, and the second motor 13 and the third motor 22 are both servo motors.

[0028] The feeding mechanism enables the workpiece to rotate, allowing the shot to impact all surfaces of the workpiece (including the inner side and corners), eliminating dead corners during cleaning, improving the consistency of bearing ring surface treatment, and ensuring subsequent processing and performance.

[0029] For example, such as Figure 3 As shown, a door 31 is rotatably installed at the left edge of the front end of the processing chamber 1. A handle 32 is fixedly installed on the outer wall of the front end of the door 31. A first fixing block 33 is fixedly installed on the outer wall of the right side of the door 31. A second fixing block 34 is fixedly installed on the outer wall of the right side of the processing chamber 1 at the corresponding position of the first fixing block 33. A limit rod 35 is vertically and slidably installed on the second fixing block 34. A connecting plate 36 is fixedly installed at the top of the limit rod 35. A pull ring 37 is fixedly installed at the top of the connecting plate 36. A spring 38 is sleeved on the limit rod 35. The top of the spring 38 is fixedly connected to the connecting plate 36. The bottom of the spring 38 is fixedly connected to the second fixing block 34. A limiting hole 39 matching the limit rod 35 is opened on the first fixing block 33 at the corresponding position of the limit rod 35. Support pads 40 are fixedly installed at the four corners of the bottom of the processing chamber 1. A PLC controller 41 is fixedly installed on the outer wall of the left side of the processing chamber 1.

[0030] In some examples, when using this device, the operator first places the bearing ring to be processed on the hook 15, and then starts the first motor 7, which drives the threaded rod 4 to rotate. Because the toothed pulleys 5 fixedly installed on both sets of threaded rods 4 are connected by a toothed synchronous belt 6, the first motor 7 can drive the two sets of threaded rods 4 to rotate synchronously, thereby moving the mounting block 11 into the mounting groove 9. Then the operator can close the chamber door 31. After closing the chamber door 31, the limiting rod 35 engages with the limiting hole 39 under the action of the spring 38, thereby fixing the chamber door 31. Then the operator can start the shot blasting machine body 1. 6. The workpieces are shot blasted. During shot blasting, the operator can start the second motor 13, which drives the bearing ring placed on the hook 15 to rotate via the vertical rod 14. This allows the shot to impact all surfaces of the workpiece, eliminating dead corners and improving the consistency of the bearing ring surface treatment, ensuring subsequent processing and performance. In addition, during shot blasting, the operator can also start the dust extraction fan 25, which sucks up the dust generated during shot blasting through the dust extraction hood 27 and the first connecting pipe 29 and collects it inside the dust collection box 26. This significantly reduces the dust concentration in the workshop, protects the health of the operators, reduces dust corrosion to the equipment, and extends the service life of the equipment.

[0031] like Figure 4 As shown, this invention illustrates a shot blasting machine for bearing rings in another embodiment of the present invention. The anti-clogging mechanism includes a feed pipe 19, a rotating shaft 20, a spiral auger 21, a third motor 22, and a feed port 23. A collection box 17 is fixedly installed at the bottom of the right outer wall of the processing chamber 1. The feed pipe 19 is inclinedly arranged at the bottom of the processing chamber 1, and extends to the inside of the collection box 17 on the right side. A feed port 23 is opened at the right edge of the bottom end of the feed pipe 19. The bottom end of the shot blasting feed hopper 18 is connected to the feed pipe 19. A rotating shaft 20 is rotatably installed inside the feed pipe 19. A spiral auger 21 is fixedly installed on the rotating shaft 20. A third motor 22 is fixedly installed on the left outer wall of the feed pipe 19, and the output end of the third motor 22 is fixedly connected to the rotating shaft 20. In some examples, when using this device, the operator can simultaneously start the third motor 22, which drives the spiral auger 21 through the rotating shaft 20, thereby conveniently conveying the used shot into the collection box 17. Through the above settings, it is possible to effectively prevent the shot from clogging in the feed pipe, ensure smooth shot circulation, reduce downtime for unclogging, improve equipment efficiency, and reduce manual maintenance costs.

[0032] It should be noted that the PLC controller 41 is an S7-200SMART, used to control the operating status and other parameters of various electrically driven components within the device. The first motor 7 is a JGY-370, the second motor 13 and the third motor 22 are both MELSERVO-J4, and the vacuum cleaner fan 20 is a 4-72-4.5A. All of the above electrical components are existing devices or equipment, or devices or equipment that can be implemented with existing technology. Their power supply, specific composition, and principles are clear to those skilled in the art, and therefore will not be described in detail. It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A shot blasting machine for bearing rings, characterized in that, include: The processing chamber (1) is equipped with a feeding mechanism at the top and a shot blasting machine body (16) is embedded and fixedly installed on the outer wall of the rear end of the processing chamber (1). A shot blasting hopper (18) is fixedly installed inside the processing chamber (1) and an anti-blocking mechanism is installed at the bottom of the shot blasting hopper (18). A bracket (24) is fixedly installed on the left outer wall of the processing chamber (1). A dust collection mechanism is installed on the bracket (24). The dust collection mechanism includes a dust collection fan (25), a dust collection box (26), a dust collection hood (27), a first connecting pipe (29), and a second connecting pipe (30). The dust collection fan (25) is fixedly installed at the top of the bracket (24). The dust collection box (26) is fixedly installed at the rear end of the dust collection fan (25) at the top of the bracket (24). The dust collection hood (27) is embedded and fixedly installed on the left outer wall of the processing chamber (1). The input end of the dust collection fan (25) is sealed and connected to the first connecting pipe (29). The first connecting pipe (29) is sealed and connected to the dust collection hood (27). The output end of the dust collection fan (25) is sealed and connected to the second connecting pipe (30). The other end of the second connecting pipe (30) extends into the dust collection box (26).

2. The shot blasting machine for bearing rings according to claim 1, characterized in that, A protective net (28) is fixedly installed inside the dust collection hood (27).

3. The shot blasting machine for bearing rings according to claim 1, characterized in that, The feeding mechanism includes mounting strips (2), grooves (3), threaded rods (4), toothed pulleys (5), toothed synchronous belts (6), a first motor (7), and mounting plates (8). Mounting strips (2) are fixedly installed at the two edges of the top of the processing chamber (1). Grooves (3) are longitudinally opened on the side of the mounting strips (2) that are close to each other. Threaded rods (4) are rotatably installed inside the two sets of grooves (3). Toothed pulleys (5) are fixedly installed at the rear ends of the two sets of threaded rods (4). Toothed synchronous belts (6) are installed between the two sets of toothed pulleys (5) and are connected by transmission through the toothed synchronous belts (6). A first motor (7) is fixedly installed on the outer wall of the rear end of the processing chamber (1). The output end of the first motor (7) is fixedly connected to one of the sets of threaded rods (4). Mounting plates (8) are provided at the top of the processing chamber (1). The two sides of the mounting plates (8) are slidably connected to the grooves (3) at the corresponding positions and are threadedly connected to the threaded rods (4) at the corresponding positions.

4. The shot blasting machine for bearing rings according to claim 3, characterized in that, The feeding mechanism also includes an installation groove (9), a fitting groove (10), an installation block (11), a turntable (12), a second motor (13), a vertical rod (14), and hooks (15). The top of the processing chamber (1) is provided with an installation groove (9), and the inner walls on both sides of the installation groove (9) are provided with fitting grooves (10) longitudinally. The bottom of the installation plate (8) is fixedly installed with an installation block (11) at the corresponding position of the installation groove (9). Both sides of the installation block (11) are slidably connected to the fitting grooves (10) at the corresponding positions. The bottom of the installation block (11) is rotatably installed with a turntable (12). The bottom of the turntable (12) is fixedly installed with a vertical rod (14). Several sets of hooks (15) are fixedly installed on the vertical rod (14). The top of the installation plate (8) is fixedly installed with a second motor (13). The output end of the second motor (13) is fixedly connected to the turntable (12).

5. A shot blasting machine for bearing rings according to claim 4, characterized in that, The anti-blocking mechanism includes a feeding pipe (19), a rotating shaft (20), a spiral auger (21), a third motor (22), and a feeding port (23). A collection box (17) is fixedly installed at the bottom of the right outer wall of the processing chamber (1). The feeding pipe (19) is inclined at the bottom of the processing chamber (1). The right side of the feeding pipe (19) extends into the collection box (17). A feeding port (23) is opened at the right edge of the bottom end of the feeding pipe (19). The bottom end of the shot blasting hopper (18) is connected to the feeding pipe (19). A rotating shaft (20) is rotatably installed inside the feeding pipe (19). A spiral auger (21) is fixedly installed on the rotating shaft (20). A third motor (22) is fixedly installed on the left outer wall of the feeding pipe (19). The output end of the third motor (22) is fixedly connected to the rotating shaft (20).

6. A shot blasting machine for bearing rings according to claim 5, characterized in that, The first motor (7) is a self-locking motor, and the second motor (13) and the third motor (22) are both servo motors.

7. A shot blasting machine for bearing rings according to claim 1, characterized in that, A door (31) is rotatably installed at the left edge of the front end of the processing chamber (1). A handle (32) is fixedly installed on the outer wall of the front end of the door (31). A first fixing block (33) is fixedly installed on the outer wall of the right side of the door (31). A second fixing block (34) is fixedly installed on the outer wall of the right side of the processing chamber (1) at the corresponding position of the first fixing block (33). A limit rod (35) is vertically and slidably installed on the second fixing block (34). A connecting plate (36) is fixedly installed at the top of the limit rod (35). A pull ring (37) is fixedly installed at the top of the connecting plate (36). A spring (38) is sleeved on the limit rod (35). The top of the spring (38) is fixedly connected to the connecting plate (36). The bottom of the spring (38) is fixedly connected to the second fixing block (34). A limit hole (39) matching the limit rod (35) is opened on the first fixing block (33) at the corresponding position of the limit rod (35).

8. A shot blasting machine for bearing rings according to claim 1, characterized in that, Support pads (40) are fixedly installed at the four corners of the bottom of the processing chamber (1), and a PLC controller (41) is fixedly installed on the outer wall of the left side of the processing chamber (1).

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