Hanger mechanism for shot blasting treatment

Abstract

The invention provides a hanger mechanism for shot blasting treatment, which comprises a hanger, a connecting mechanism is arranged below the hanger, a first connecting rod and a second connecting rod are arranged in the connecting mechanism, the first connecting rod is fixedly connected with the hanger, a supporting rod is arranged below the connecting mechanism, and the second connecting rod is fixedly connected with the hanger. The upper end and the lower end of the supporting rod are fixedly connected with the second connecting rod, a plurality of limiting grooves are formed in the outer surface of the supporting rod and linearly distributed in the length direction of the supporting rod, supporting mechanisms are arranged in the limiting grooves, and first fixing grooves are formed in the limiting grooves in a penetrating mode; a fixing rod is arranged in the first fixing groove, and the supporting mechanism is connected with the supporting rod through the fixing rod. According to the hanging frame mechanism for shot blasting treatment, the working efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of shot blasting machines and relates to a hanging rack mechanism for shot blasting. Background Art

[0002] Shot blasting machine refers to casting equipment that uses high-speed projectiles thrown by the shot blaster to clean or strengthen the surface of castings. Shot blasting machine can simultaneously remove sand, core and clean castings. In some areas, it is also called sandblasting machine or sandblasting machine.

[0003] Shot blasting is a surface treatment technology that is usually used to remove oxides, oil, rust and other dirt from metal surfaces. This treatment method uses a shot blasting machine to place the metal workpiece on a rotating platform, and then a high-speed rotating grinding wheel or other shot blasting machine will shoot small particles of shot sand at high speed onto the workpiece surface, generating a strong impact force, effectively removing dirt and impurities on the workpiece surface, while increasing the roughness of the workpiece surface and increasing the adhesion of the coating or plating.

[0004] The existing technology has the following problems: when using a hanger to shot blast the workpiece, since there are a large number of different types of workpieces, the staff needs to prepare a large number of different hangers. When placing the workpieces, the staff needs to select the corresponding hanger according to the shape and quantity of the workpieces to be processed. Since one hanger is only used to fix one type of workpiece, when shot blasting a small batch of different workpieces, the required working time is greatly increased, which leads to low work efficiency. Summary of the invention

[0005] The object of the present invention is to provide a rack mechanism for shot blasting, aiming to solve the problem of low working efficiency.

[0006] To solve the above technical problems, the present invention provides a hanging rack mechanism for shot blasting, comprising a hanging ear, a connecting mechanism is arranged below the hanging ear, a first connecting rod and a second connecting rod are arranged inside the connecting mechanism, the first connecting rod is fixedly connected to the hanging ear, a support rod is arranged below the connecting mechanism, the upper and lower ends of the support rod are fixedly connected to the second connecting rod, a plurality of limiting grooves are provided on the outer surface of the support rod, and the plurality of limiting grooves are linearly distributed along the length direction of the support rod, a supporting mechanism is arranged inside the plurality of limiting grooves, a first fixed groove is arranged inside the limiting groove, a fixing rod is arranged inside the first fixed groove, and the supporting mechanism and the support rod are connected via the fixing rod.

[0007] The present invention is further configured such that the connecting mechanism includes a first connecting rod, a second connecting rod and a threaded sleeve, the first connecting rod is provided with a connecting groove on the end face close to the second connecting rod, the second connecting rod is fixedly provided with a connecting plate corresponding to the connecting groove on the end face close to the first connecting rod, the outer surface of the first connecting rod is sleeved with a threaded sleeve, and the threaded sleeve is threadedly connected to the second connecting rod.

[0008] The present invention is further configured as follows: the support mechanism includes a fixed plate, a plurality of support tubes are fixedly installed on the outer surface of the fixed plate, the plurality of support tubes are circumferentially distributed about the center line of the fixed plate, a first sliding plate is arranged inside the support tube, the first sliding plate is slidably connected to the support tube, an extension rod is fixedly installed on the side of the first sliding plate away from the fixed plate, a plurality of first insertion grooves are opened on the outer surface of the support tube, the plurality of first insertion grooves are linearly distributed along the axial direction of the support tube, the first insertion groove passes through the sliding plate and the support tube, and a first limiting rod is arranged inside the first insertion groove.

[0009] The present invention is further configured such that a first sliding groove is opened inside the fixed plate, a first guide rod is fixedly installed on the inner wall of the first sliding groove, a first slide plate is arranged inside the first sliding groove, an insertion rod is fixedly installed on one end of the first slide plate away from the first guide rod, a first spring is sleeved on the outer surface of the first guide rod, and the two ends of the first spring are respectively fixedly connected to the inner wall of the first sliding groove and the end face of the first slide plate.

[0010] The present invention is further configured such that a second sliding groove is provided inside the fixed rod corresponding to the first sliding groove, second insertion grooves corresponding to the insertion rod are provided on both sides of the inner wall of the second sliding groove, a push rod is provided inside the second insertion groove, an arc plate is fixedly installed at one end of the push rod away from the insertion rod, a second spring is sleeved on the outer surface of the push rod, and the two ends of the second spring are respectively fixedly connected to the inner wall of the second sliding groove and the surface of the arc plate.

[0011] The present invention is further configured such that a second limiting rod is fixedly installed on the inner wall of the second sliding groove corresponding to the arc plate, a sliding groove is opened on the inner wall of the second sliding groove corresponding to the second limiting rod, a push rod is arranged inside the sliding groove, a top plate is fixedly installed on one end of the push rod close to the second limiting rod, a third spring is sleeved on the outer surface of the push rod, and both ends of the third spring are respectively fixedly connected to the surface of the top rod and the inner wall of the second sliding groove.

[0012] The present invention is further configured such that the fixed plate is composed of a first fan-shaped plate, a second fan-shaped plate and a pin, and the first fan-shaped plate is rotatably connected to the second fan-shaped plate via the pin.

[0013] The present invention is further configured such that a buffer ring is provided between the limiting groove and the fixing plate.

[0014] The present invention is further configured such that a circular ring is arranged above the extension rod, a groove corresponding to the circular ring is opened at one end of the extension rod away from the fixed plate, a plurality of through grooves are opened on the outer surface of the circular ring, the plurality of through grooves are distributed around the circumference of the center box of the circular ring, and the through grooves pass through the extension rod, and a third limiting rod is arranged inside the through grooves.

[0015] The present invention is further configured such that one end of the insertion rod close to the top rod is provided with a rounded corner.

[0016] Compared with the prior art, the present invention provides a rack mechanism for shot blasting. The present invention sets a connecting mechanism and a supporting mechanism. The staff selects the corresponding supporting mechanism according to the type and quantity of the workpieces to be processed, and places the supporting mechanism in the corresponding placement slot. The supporting rods carrying different supporting mechanisms are connected through the connecting mechanism. The uppermost supporting rod is connected to the hanging ear through the connecting mechanism. After assembly, a single rack can load different types of workpieces at the same time. When processing small batches of different types of workpieces, the required working time is greatly shortened, thereby improving work efficiency.

[0017] Secondly, the bracket mechanism can be freely combined according to needs through the combination of modules such as hanging ears, connecting mechanisms, support rods and supporting mechanisms. If a module fails, it can be quickly replaced without disassembling the entire bracket, thereby improving the overall flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 An exploded view of the present invention;

[0020] Figure 3 It is the internal structure diagram of the connection mechanism in the present invention;

[0021] Figure 4 It is the internal structure diagram of the support mechanism in the present invention;

[0022] Figure 5 for Figure 4 A partial enlarged view of middle A;

[0023] Figure 6 for Figure 5 A partial enlarged view of B in the middle;

[0024] Figure 7 for Figure 4 A partial enlarged view of middle C;

[0025] Figure 8 It is an exploded view of the supporting mechanism and the circular ring in the present invention.

[0026] Among them, 1, hanging ear; 2, connecting mechanism; 201, first connecting rod; 202, second connecting rod; 203, threaded sleeve; 204, connecting groove; 205, connecting plate; 3, supporting rod; 4, limiting groove; 5, supporting mechanism; 501, fixing plate; 5011 first fan-shaped plate; 5012 second fan-shaped plate; 502, supporting tube; 503, first sliding plate; 504, extension rod; 505, first insertion groove; 505, first limiting rod; 507, first sliding groove; 508, The first guide rod; 509, the first slide plate; 510, the insertion rod; 511, the first spring; 6, the first fixed groove; 7, the fixed rod; 701, the second sliding groove; 702, the second insertion groove; 703, the push rod; 704, the arc plate; 705, the second spring; 706, the second limiting rod; 707, the sliding groove; 708, the push rod; 709, the top plate; 710, the third spring; 8, the buffer ring; 9, the circular ring; 10, the groove; 11, the through groove; 12, the third limiting rod; 13, the fillet. DETAILED DESCRIPTION

[0027] The following is a further detailed description of a rack mechanism for shot blasting proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the accompanying drawings represent the same or similar components.

[0028] Reference Figure 1-8 As shown, a rack mechanism for shot blasting includes a hanging ear 1, a connecting mechanism 2 is arranged below the hanging ear 1, a first connecting rod 201 and a second connecting rod 202 are arranged inside the connecting mechanism 2, the first connecting rod 201 is fixedly connected to the hanging ear 1, a support rod 3 is arranged below the connecting mechanism 2, the upper and lower ends of the support rod 3 are fixedly connected to the second connecting rod 202, a plurality of limiting grooves 4 are opened on the outer surface of the support rod 3, the plurality of limiting grooves 4 are linearly distributed along the length direction of the support rod 3, and a supporting mechanism 5 is arranged inside the plurality of limiting grooves 4, and the staff can select the length of the supporting mechanism 5 to be unfolded according to the size and quantity of the workpieces to be processed. The limiting groove 4 has a first fixed groove 6 extending therethrough, and a fixed rod 7 is arranged inside the first fixed groove 6. The supporting mechanism 5 is connected to the supporting rod 3 by the fixed rod 7. The staff selects the corresponding supporting mechanism 5 and supporting rod 3 according to the size and quantity of the workpieces to be processed, and connects the hanging ear 1 and the corresponding supporting rod 3 by the connecting mechanism 2. At the same time, the two supporting rods 3 can be connected by the connecting mechanism 2. At the same time, the staff can assemble the hanging rack by themselves as needed, so that the hanging rack can meet more work requirements. When maintaining the hanging rack, the staff can completely disassemble the hanging rack and replace the damaged parts because the assembly of the hanging rack is relatively simple.

[0029] like Figure 3 As shown, the connecting mechanism 2 includes a first connecting rod 201, a second connecting rod 202 and a threaded sleeve 203. The end surface of the first connecting rod 201 close to the second connecting rod 202 is provided with a connecting groove 204, and the end surface of the second connecting rod 202 close to the first connecting rod 201 is fixedly installed with a connecting plate 205 corresponding to the connecting groove 204. The outer surface of the first connecting rod 201 is sleeved with a threaded sleeve 203, and the threaded sleeve 203 is threadedly connected to the second connecting rod 202. Since the first connecting rod 201 and the second connecting rod 202 are both threadedly connected to the threaded sleeve 203, the staff can rotate the connecting rod 201 to connect the first connecting rod 201 and the second connecting rod 202. The movable threaded sleeve 203 controls the separation or approach of the first connecting rod 201 and the second connecting rod 202, and the connecting groove 204 and the connecting plate 205 are both cross-shaped. The cross-shaped design can make the connecting groove 204 and the connecting plate 205 have more contact areas and connection points, thereby enhancing the stability of the connection, effectively preventing the connecting part from loosening or slipping when bearing load, and ensuring the stability and reliability of the bracket mechanism during operation. The staff only needs to align the connecting plate 205 with the cross-shaped opening of the connecting groove 204 and complete the connection by tightening the threaded sleeve 203.

[0030] like Figure 4-5 As shown, the support mechanism 5 includes a fixed plate 501, and a plurality of support tubes 5011, a first fan-shaped plate, 5012, a second fan-shaped plate, 502 are fixedly installed on the outer surface of the fixed plate 501. The plurality of support tubes 5011, a first fan-shaped plate, 5012, and a second fan-shaped plate 502 are distributed circumferentially about the center line of the fixed plate 501. The first sliding plate 503 is arranged inside the support tubes 5011, a first fan-shaped plate, 5012, and a second fan-shaped plate 502. The first sliding plate 503 is slidably connected to the support tubes 5011, a first fan-shaped plate, 5012, and a second fan-shaped plate 502. An extension rod 504 is fixedly installed on the side of the sliding plate away from the fixed plate 501. The outer surfaces of the support tubes 5011, a first fan-shaped plate, 5012, and a plurality of A first insertion slot 505, several first insertion slots 505 are linearly distributed along the axial direction of the support tube 5011, the first fan-shaped plate 5012, the second fan-shaped plate 502, the first insertion slot 505 penetrates the sliding plate and the support tube 5011, the first fan-shaped plate 5012, the second fan-shaped plate 502, a first limiting rod 505 is arranged inside the first insertion slot 505, the staff moves the extension rod 504 according to the number and size of the workpieces to be processed to make the first sliding plate 503 move along the length direction of the support tube 5011, the first fan-shaped plate 5012, the second fan-shaped plate 502, when the first sliding plate 503 moves to a suitable position, the first limiting rod 505 is inserted into the first insertion slot 505, so that the extension rod 504 is extended to a suitable length.

[0031] like Figure 5 As shown, a first sliding groove 507 is opened inside the fixed plate 501, and a first guide rod 508 is fixedly installed on the inner wall of the first sliding groove 507. A first slide plate 509 is arranged inside the first sliding groove 507, and an insertion rod 510 is fixedly installed on the end of the first slide plate 509 away from the first guide rod 508. A first spring 511 is sleeved on the outer surface of the first guide rod 508, and the two ends of the first spring 511 are respectively fixedly connected to the inner wall of the first sliding groove 507 and the end face of the first slide plate 509. The first spring 511 pushes the first slide plate 509 to abut against the first sliding groove 507 in real time. When the insertion rod 510 is squeezed to cause the first sliding plate 503 to be displaced, the first spring 511 can push the first slide plate 509 to quickly return to its original position.

[0032] like Figure 5-6 As shown, a second sliding groove 701 is provided inside the fixing rod 7 corresponding to the first sliding groove 507, and second insertion grooves 702 corresponding to the insertion rod 510 are provided on both sides of the inner wall of the second sliding groove 701, and a push rod 703 is provided inside the second insertion groove 702. An arc plate 704 is fixedly installed at one end of the push rod 703 away from the insertion rod 510, and a second spring 705 is sleeved on the outer surface of the push rod 703. The two ends of the second spring 705 are respectively fixedly connected to the inner wall of the second sliding groove 701 and the surface of the arc plate 704. After the insertion rod 510 enters the second insertion groove 702, the fixing rod 7 is fixed to the fixing plate 501, and at the same time, the supporting mechanism 5 is tightly combined with the supporting rod 3. When the supporting mechanism 5 is disassembled, the push rod 703 pushes the insertion rod 510 to leave the second insertion groove 702, so that the fixing rod 7 and the supporting mechanism 5 are separated from each other, so that the supporting mechanism 5 can be separated from the support rod 3, and the second spring 705 pushes the arc plate 704 to quickly reset the push rod 703.

[0033] like Figure 6 As shown, a second limiting rod 706 is fixedly installed on the inner wall of the second sliding groove 701 corresponding to the arc plate 704, and a sliding groove 707 is opened on the inner wall of the second sliding groove 701 corresponding to the second limiting rod 706, and a push rod 708 is arranged inside the sliding groove 707, and a top plate 709 is fixedly installed on one end of the push rod 708 close to the second limiting rod 706, and a third spring 710 is sleeved on the outer surface of the push rod 708, and the two ends of the third spring 710 are respectively fixedly connected to the surface of the top rod 703 and the inner wall of the second sliding groove 701. The staff pushes the push rod 708, so that the push rod 708 drives the top plate 709 to push the arc plate 704 along the surface of the arc plate 704, and then the top rod 703 pushes the insertion rod 510, so that the insertion rod 510 disengages from the second insertion groove 702.

[0034] like Figure 7As shown, the fixed plate 501 is composed of a first fan-shaped plate, a second fan-shaped plate and a pin. The first fan-shaped plate and the second fan-shaped plate are rotatably connected by the pin. The first fan-shaped plate and the second fan-shaped plate can be tightly fitted together when needed to form a stable supporting surface, so that the fixed plate 501 is stable in the limiting groove 4. After the fixing rod 7 is separated from the supporting mechanism 5, the staff can rotate the first fan-shaped plate and the second fan-shaped plate to make the supporting mechanism 5 smoothly separate from the limiting groove 4.

[0035] like Figure 2 As shown, a buffer ring 8 is arranged between the limit groove 4 and the fixed plate 501. During the operation of the hanging mechanism, the fixed plate 501 may generate a certain impact force due to the hanging or movement of the workpiece. The setting of the buffer ring 8 can effectively absorb these impact forces and reduce the direct collision between the fixed plate 501 and the limit groove 4, thereby reducing the risk of wear and damage. At the same time, the buffer ring 8 is used to fill the gap between the fixed plate 501 and the limit groove 4, so that the fixed plate 501 is more stable in the limit groove 4.

[0036] like Figure 8 As shown, a ring 9 is arranged above the extension rod 504, and a groove 10 corresponding to the ring 9 is opened at one end of the extension rod 504 away from the fixed plate 501, and a plurality of through grooves 11 are opened on the outer surface of the ring 9. The plurality of through grooves 11 are distributed around the circumference of the center box of the ring 9, and the through grooves 11 penetrate the extension rod 504, and a third limiting rod 12 is arranged inside the through groove 11. The existence of the ring 9 forms an additional hanging area above the extension rod 504, which can be used to hang more workpieces. The third limiting rod 12 fixes the ring 9 in the groove 10. When processing large quantities of workpieces, the staff can choose whether to use the ring 9 according to needs.

[0037] like Figure 5 As shown, a rounded corner 13 is provided at one end of the insertion rod 510 close to the top rod 703. During mechanical movement, sharp edges or right angles are more likely to cause stress concentration, leading to material fatigue or cracking. The rounded corner 13 can make the stress distribution more uniform, thereby improving the durability and reliability of the component. During the cooperation process between the insertion rod 510 and the top rod 703, the rounded corner 13 design can reduce the friction and interference between the two.

[0038] The staff selects the corresponding driving support mechanism 5 and support rod 3 according to the size and number of the workpieces to be processed. After the connecting plate 205 on the support rod 3 corresponds to the connecting groove 204, the support rod 3 is connected to the hanging ear 1 by rotating the threaded sleeve 203, and the buffer pad is placed in the corresponding limiting groove 4. Then the staff moves the support mechanism 5 to the corresponding limiting groove 4, and inserts the fixing rod 7 into the first fixing groove 6 by rotating the first fan-shaped plate and the second fan-shaped plate at the same time, so that the first fan-shaped plate and the second fan-shaped plate are fixed. In the process of inserting the fixing rod 7 into the first fixing groove 6, the first spring 511 pushes the insertion rod 510 on the first slide plate 509 to contact the fixing rod 7 in real time. When the second insertion groove 702 corresponds to the insertion rod 510, the first spring 511 pushes the insertion rod 510 to quickly The first locking cam 504 is pressed against the second support frame 506, and the locking cam 506 is pressed against the second support frame 506. The locking cam 506 is pressed against the second support frame 506, and the locking cam 506 is pressed against the second support frame 506.

[0039] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A rack mechanism for shot blasting, characterized in that: The invention comprises 1. a hanging ear (1), wherein a connecting mechanism (2) is arranged below the hanging ear (1), a first connecting rod (201) and a second connecting rod (202) are arranged inside the connecting mechanism (2), the first connecting rod (201) is fixedly connected to the hanging ear (1), a supporting rod (3) is arranged below the connecting mechanism (2), the upper and lower ends of the supporting rod (3) are fixedly connected to the second connecting rod (202), a plurality of limiting grooves (4) are arranged on the outer surface of the supporting rod (3), the plurality of limiting grooves (4) are linearly distributed along the length direction of the supporting rod (3), a supporting mechanism (5) is arranged inside the plurality of limiting grooves (4), a first fixing groove (6) is arranged inside the limiting groove (4), a fixing rod (7) is arranged inside the first fixing groove (6), and the supporting mechanism (5) and the supporting rod (3) are connected via the fixing rod (7).

2. A rack mechanism for shot blasting according to claim 1, characterized in that: The connecting mechanism (2) comprises a first connecting rod (201), a second connecting rod (202) and a threaded sleeve (203); a connecting groove (204) is provided on the end surface of the first connecting rod (201) close to the second connecting rod (202); a connecting plate (205) corresponding to the connecting groove (204) is fixedly installed on the end surface of the second connecting rod (202) close to the first connecting rod (201); a threaded sleeve (203) is sleeved on the outer surface of the first connecting rod (201), and the threaded sleeve (203) is threadedly connected to the second connecting rod (202).

3. A rack mechanism for shot blasting according to claim 1, characterized in that: The support mechanism (5) comprises a fixed plate (501), a plurality of support tubes (502) are fixedly mounted on the outer surface of the fixed plate (501), the plurality of support tubes (502) are circumferentially distributed about the center line of the fixed plate (501), a first sliding plate (503) is arranged inside the support tube (502), the first sliding plate (503) is slidably connected to the support tube (502), an extension rod (504) is fixedly mounted on a side of the first sliding plate (503) away from the fixed plate (501), a plurality of first insertion grooves (505) are opened on the outer surface of the support tube (502), the plurality of first insertion grooves (505) are linearly distributed along the axial direction of the support tube (502), the first insertion grooves (505) penetrate the sliding plate and the support tube (502), and a first limiting rod (505) is arranged inside the first insertion groove (505).

4. A rack mechanism for shot blasting according to claim 3, characterized in that: A first sliding groove (507) is provided inside the fixed plate (501), a first guide rod (508) is fixedly installed on the inner wall of the first sliding groove (507), a first slide plate (509) is provided inside the first sliding groove (507), an insertion rod (510) is fixedly installed on one end of the first slide plate (509) away from the first guide rod (508), a first spring (511) is sleeved on the outer surface of the first guide rod (508), and the two ends of the first spring (511) are respectively fixedly connected to the inner wall of the first sliding groove (507) and the end face of the first slide plate (509).

5. A rack mechanism for shot blasting according to claim 4, characterized in that: A second sliding groove (701) is provided inside the fixed rod (7) corresponding to the first sliding groove (507), and second insertion grooves (702) corresponding to the insertion rod (510) are provided on both sides of the inner wall of the second sliding groove (701), and a push rod (703) is provided inside the second insertion groove (702), and an arc plate (704) is fixedly installed at one end of the push rod (703) away from the insertion rod (510), and a second spring (705) is sleeved on the outer surface of the push rod (703), and the two ends of the second spring (705) are respectively fixedly connected to the inner wall of the second sliding groove (701) and the surface of the arc plate (704).

6. A rack mechanism for shot blasting according to claim 5, characterized in that: A second limiting rod (706) is fixedly installed on the inner wall of the second sliding groove (701) corresponding to the arc plate (704), and a sliding groove (707) is opened on the inner wall of the second sliding groove (701) corresponding to the second limiting rod (706). A push rod (708) is arranged inside the sliding groove (707), and a top plate (709) is fixedly installed on one end of the push rod (708) close to the second limiting rod (706). A third spring (710) is sleeved on the outer surface of the push rod (708), and the two ends of the third spring (710) are respectively fixedly connected to the surface of the top rod (703) and the inner wall of the second sliding groove (701).

7. A rack mechanism for shot blasting according to claim 3, characterized in that: The fixed plate (501) is composed of a first sector plate (5011), a second sector plate (5012) and a pin, and the first sector plate (5011) and the second sector plate (5012) are rotatably connected via the pin.

8. A rack mechanism for shot blasting according to claim 3, characterized in that: A buffer ring (8) is provided between the limiting groove (4) and the fixing plate (501).

9. A rack mechanism for shot blasting according to claim 3, characterized in that: A circular ring (9) is arranged above the extension rod (504); a groove (10) corresponding to the circular ring (9) is provided at one end of the extension rod (504) away from the fixing plate (501); a plurality of through grooves (11) are provided on the outer surface of the circular ring (9); the plurality of through grooves (11) are distributed around the circumference of the center box of the circular ring (9), and the through grooves (11) penetrate the extension rod (504); and a third limiting rod (12) is provided inside the through groove (11).

10. A rack mechanism for shot blasting according to claim 6, characterized in that: One end of the insertion rod (510) close to the top rod (703) is provided with a rounded corner (13).

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