Brake drum shot blasting device

By designing a shot blasting device that combines the shot blaster with the feeding rail, continuous rotation shot blasting of the brake drum is achieved, solving the problem of low efficiency in existing technologies, improving processing efficiency and quality, and reducing equipment costs.

CN223903707UActive Publication Date: 2026-02-13SICHUAN YINGXIN HUITONG IND CO LTD
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Patent Information

Application Number
CN202520581199.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2026-02-13
Estimated Expiration
2035-03-31

AI Technical Summary

Technical Problem

The fixed shot blasting direction of existing shot blasting equipment results in low processing efficiency, requires multiple shot blasters and extended processing time to avoid blind spots, and cannot efficiently remove molding sand and oxide scale from the surface of the brake drum.

Method used

A shot blasting device for brake drum has been designed, including a frame, a shot blasting box, a shot blaster, and a feeding rail. The shot blasting surface of the shot blaster is tangent to the outer circumferential surface of the brake drum. The continuous rotation shot blasting of the brake drum is achieved through the cooperation of the shot blaster and the feeding rail, which simplifies the equipment structure and eliminates the disassembly and assembly process.

Benefits of technology

This technology enables efficient shot blasting of the outer surface of the brake drum, improving production efficiency, ensuring consistency in processing quality and speed, and reducing equipment hardware costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The brake drum shot blasting device comprises a rack, the rack is provided with a shot blasting box, and the shot blasting box is provided with a feeding port and a discharging port; an avoiding groove is further formed in the top of the shot blasting box and communicates with the feeding opening and the discharging opening; the shot blasting box is further provided with a plurality of shot blasting devices, all the shot blasting devices are arranged on the shot blasting box, and the blasting face of each shot blasting box is tangent to the peripheral face of the brake drum to be machined. The shot blasting device further comprises a feeding sky rail, a plurality of sliding seats are arranged on the feeding sky rail in a sliding mode, and each sliding seat is provided with a driving module used for driving the sliding seat to slide on the feeding sky rail. Each sliding seat is further rotationally provided with a rotating rod used for installing a brake drum to be machined. The to-be-machined brake drum is driven to rotate through the impact force of the steel balls, so that the to-be-machined area is automatically switched to complete machining, the to-be-machined part disassembling and assembling procedure consuming long time is omitted, it is guaranteed that shot blasting can be continuously carried out, and then the shot blasting efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power station gate equipment, in particular to a brake drum shot blasting device. BACKGROUND

[0002] The automobile brake drum is generally produced through casting, and a large amount of casting sand is still attached to the surface of the brake drum after demolding, so that the sand on the surface of the brake drum is removed through the shot blasting mode in the prior art, and the oxide skin on the surface of the brake drum is also removed.

[0003] In the prior art, the shot blasting direction of the shot blasting device is fixed, and the position of the part to be processed cannot be adjusted, so that a plurality of shot blasting devices need to be arranged, and the shot blasting time is prolonged to process the whole part through the reflection of the steel balls to avoid the processing blind area, and the processing efficiency is low. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the application is to provide a brake drum shot blasting device, which aims to solve the low production efficiency defect in the prior art.

[0005] The application achieves the above-mentioned purpose through the following technical scheme:

[0006] A brake drum shot blasting device comprises a rack;

[0007] A shot blasting box is arranged on the rack, and the shot blasting box is provided with an inlet and an outlet; an avoiding groove is further arranged on the top of the shot blasting box, and the avoiding groove is communicated with the inlet and the outlet;

[0008] A plurality of shot blasting devices are arranged on the shot blasting box, and the shot blasting surface of each shot blasting device is tangent to the outer circumferential surface of the brake drum to be processed;

[0009] A feeding overhead rail is provided with a plurality of sliding seats which are slidably arranged on the feeding overhead rail, and each sliding seat is provided with a driving module for driving the sliding seat to slide on the feeding overhead rail; a rotating rod for mounting the brake drum to be processed is further rotatably arranged on each sliding seat.

[0010] Optionally, the inlet and the outlet are provided with a shielding curtain; the two sides of the avoiding groove are provided with shielding plates which are spliced with each other to close the avoiding groove.

[0011] Optionally, along the moving direction of the brake drum to be processed, each shot blasting device is arranged on the two sides of the brake drum to be processed; the shot blasting surface of each shot blasting device is tangent to the outer circumferential surface of the brake drum to be processed, and the force direction of each shot blasting device to the brake drum to be processed is the same.

[0012] Optionally, the shot blasting box is further provided with a control console, a rotating seat is rotatably arranged on the control console, and a clamping seat is arranged on the rotating seat; an outlet end of the shot blasting machine is arranged in the shot blasting box, and the other end is connected with the clamping seat; a locking module is further arranged between the rotating seat and the shot blasting box.

[0013] Optionally, the locking module comprises an adjusting groove in an arc structure, the adjusting groove is arranged on the control console, the rotating seat is provided with a locking screw rod matched with the adjusting groove, and a fixed block is connected with the locking screw rod by a screw thread.

[0014] Optionally, the shot blasting box and the outlet end of the shot blasting machine are further provided with a flexible sealing cover.

[0015] Optionally, the driving module comprises a driving motor, a driving rack is arranged on the feeding rail, and a driving gear matched with the driving rack is arranged on the driving motor; a plurality of rolling wheels respectively connected with the rail in sliding mode are arranged on the sliding seat.

[0016] Optionally, the cross section of the feeding rail is in an I-shaped structure, the feeding rail bottom is provided with a driving rack; support plates are arranged on both sides of the sliding seat, and each rolling wheel is rotatably arranged on the two support plates.

[0017] Optionally, an adjusting rod is rotatably arranged on the sliding seat, one end of the adjusting rod is provided with a connecting disc matched with the brake drum to be processed, the other end of the adjusting rod is provided with a connecting tenon, the adjusting rod is provided with a connecting tenon groove matched with the connecting tenon, and a limiting rod inserted into the connecting tenon groove is further connected with the adjusting rod by a screw thread.

[0018] Optionally, a thrust ball bearing is arranged on the sliding seat, an extrusion plate matched with the thrust ball bearing is arranged on the adjusting rod, a stabilizing frame is further arranged at the bottom of the sliding seat, and a rolling bearing is arranged between the stabilizing frame and the adjusting rod.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application comprises a rack, the rack is provided with a shot blasting box, the shot blasting box is provided with an inlet and an outlet; the top of the shot blasting box is further provided with an avoiding groove, the avoiding groove is communicated with the inlet and the outlet; a plurality of shot blasting machines are further arranged on the shot blasting box, each shot blasting machine is arranged on the shot blasting box, and the projection surface of each shot blasting machine is tangent to the outer circumferential surface of the brake drum to be processed; the shot blasting device further comprises a feeding rail, a plurality of sliding seats are slidably arranged on the feeding rail, a driving module for driving the sliding seat to slide on the feeding rail is arranged on each sliding seat; and a rotating rod for mounting the brake drum to be processed is rotatably arranged on each sliding seat.

[0021] In use, the brake drum to be processed is hung on the rotating rod, and then the drive module controls the sliding seat to move along the feeding rail to one side of the shot blasting box, and the brake drum to be processed is conveyed into the shot blasting box;

[0022] Then the steel balls are blasted in the shot blasting box, and since the projection surface of the shot blasting box is tangent to the outer circumferential surface of the brake drum to be processed, the collision force of the steel balls on the brake drum to be processed will also drive the brake drum to be processed to rotate, thereby continuously switching the processing area, and thus completing the shot blasting processing of the entire outer surface of the brake drum to be processed;

[0023] After the processing is completed, the brake drum to be processed is output through the sliding seat, and the continuous production can be realized by continuously replacing the brake drum by the workers;

[0024] Compared with the prior art, the shot blasting processing of the entire outer surface of the brake drum can be realized by the shot blasting device, the structure of the entire device is effectively simplified, and the hardware cost of the device is reduced;

[0025] Secondly, the pulsed continuous production of the brake drum is realized, and compared with the traditional processing method, the time-consuming disassembly and assembly process of the parts to be processed is cancelled, the shot blasting processing can be continuously performed, and thus the efficiency of the shot blasting processing is improved;

[0026] Finally, since the shot blasting processing can be continuously performed, the shot blasting device does not need to be frequently started and stopped, the processing efficiency is improved, the consistency of the shot blasting speed is ensured, and the processing quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic view of a brake drum shot blasting device according to Embodiment 1 of the present application;

[0028] Figure 2 FIG. 2 is an exploded view of the brake drum shot blasting device according to Embodiment 1 of the present application;

[0029] Figure 3 FIG. 3 is an exploded view of the shot blasting box;

[0030] Figure 4 FIG. 4 is a sectional view of the shot blasting box;

[0031] Figure 5 FIG. 5 is an exploded view of the sliding seat.

[0032] Reference signs: 1-Frame, 2-Throwing box, 3-Inlet, 4-Outlet, 5-Relief groove, 6-Throwing wheel, 7-Feeding overhead rail, 8-Sliding seat, 9-Rotating rod, 10-Shutter cloth, 11-Shutter plate, 12-Control console, 13-Rotating seat, 14-Cartridge, 15-Adjusting groove, 16-Locking screw, 17-Fixed block, 18-Flexible sealing cover, 19-Drive motor, 20-Drive rack, 21-Drive gear, 22-Rolling wheel, 23-Supporting plate, 24-Adjusting rod, 25-Connecting disc, 26-Connecting tenon, 27-Connecting tenon groove, 28-Limiting rod, 29-Thrust ball bearing, 30-Squeezing plate, 31-Stabilizing frame, 32-Rolling bearing.

[0033] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", etc. should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0038] Embodiment 1

[0039] Referring to Figures 1 to 5 , the present embodiment as an optional embodiment of the present application discloses a brake drum shot blasting device, comprising a rack 1, a shot blasting box 2 is arranged on the rack 1;

[0040] The shot blasting box 2 is integrally arranged in a rectangular structure, along the length direction of the shot blasting box 2, the shot blasting box 2 is provided with a feeding port 3 at one end, and the other end is provided with a discharging port 4 opposite to the feeding port 3, and the top of the shot blasting box 2 is also provided with an avoiding groove 5, along the length direction of the shot blasting box 2, the two ends of the avoiding groove 5 are communicated with the feeding port 3 and the discharging port 4 respectively, that is, the top of the feeding port 3 and the discharging port 4 is penetrated through the avoiding groove 5;

[0041] The feeding port 3 and the discharging port 4 are both provided with a shielding curtain 10; the two sides of the avoiding groove 5 are both provided with a shielding plate 11, and the two shielding plates 11 are spliced with each other to close the avoiding groove 5;

[0042] Through the cooperation of the shielding curtain 10 and the shielding plate 11, the closing of the shot blasting box 2 can be realized, so as to avoid the steel ball from being thrown out of the shot blasting box 2, and the safety of production is ensured; at the same time, the above device will not interfere with the feeding and discharging, and the continuity of equipment production is ensured.

[0043] The shot blasting device further comprises a plurality of shot blasting devices 6, along the length direction of the shot blasting box 2, which is the moving direction of the brake drum to be processed, along the above moving direction, each shot blasting device 6 is arranged on the two sides of the shot blasting box 2, that is, each shot blasting device 6 is arranged on the two sides of the brake drum to be processed;

[0044] The same side of each said shot blasting machine 6 is arranged in the height direction of the shot blasting box 2 and in the same vertical direction; the shot directions of the shot blasting machines 6 on different sides are just opposite; that is, if the shot directions of the shot blasting machines 6 on the left side are towards the discharge port 4 side, the shot directions of the shot blasting machines 6 on the right side are towards the feeding port 3 side;

[0045] The shot surface of each said shot blasting machine 6 is tangent to the outer circumferential surface of the brake drum to be processed;

[0046] Through the above arrangement, the brake drum to be processed can be simultaneously subjected to shot blasting processing from both left and right sides, and due to the arrangement of the shot directions, the directions of the forces of the two sides of the shot blasting machine 6 on the brake drum to be processed are the same, and then the brake drum to be processed is simultaneously pushed to rotate by the two forces, on the one hand, the pushing force of the brake drum to be processed is doubled, the rotation speed is faster, which is beneficial to improve the processing efficiency, and at the same time, it can avoid the continuous impact of the steel balls on the same area, avoid the damage of the brake drum to be processed, and improve the processing quality; on the other hand, the processing range of a single shot blasting machine 6 is shortened to 180°, which is beneficial to improve the processing efficiency.

[0047] Further, the control console 12 is further arranged on the shot blasting box 2, the control console 12 is provided with a thrust ball bearing 29, the control console 12 is further provided with a rotating seat 13, the rotating seat 13 includes a top plate and a rotating shaft coaxially connected, and the rotating shaft is provided with a pressing plate 30 matched with the thrust ball bearing 29;

[0048] The rotating shaft is inserted into the thrust ball bearing 29, and the pressing plate 30 abuts against the thrust ball bearing 29 in the vertical direction; so as to realize the rotation connection between the control console 12 and the rotating seat 13;

[0049] A clamping seat 14 is further arranged on the top surface of the top plate, the shot blasting machine 6 is inserted into the clamping seat 14 and fixed by connecting bolts;

[0050] The outlet end of the shot blasting machine 6 is arranged in the shot blasting box 2, and the shot blasting box 2 and the outlet end of the shot blasting machine 6 are further provided with a flexible sealing cover 18, and the flexible sealing cover 18 is preferably made of canvas;

[0051] Further, a locking module is further arranged between the rotating seat 13 and the shot blasting box 2, the locking module includes an adjusting groove 15 and a locking screw 16, wherein the adjusting groove 15 is arranged on the workbench, and the adjusting groove 15 is in a circular arc structure, and the center of the adjusting groove 15 is coaxial with the rotating shaft;

[0052] The locking screw rod 16 is arranged on the rotating seat 13, the free end of the rotating seat 13 is inserted into the adjusting groove 15, and a fixing block 17 is also screwed on the free end of the locking screw rod 16, and in the vertical direction, the top surface of the fixing block 17 closely abuts the bottom surface of the control console 12;

[0053] The structure can ensure that each of the shot blasting devices 6 has certain adjustability, that is, the projection surface of the shot blasting device 6 can be controlled by rotating the rotating seat 13, and thus the equipment can be adapted to different diameters of the brake drum to be processed, and the application range of the equipment is expanded;

[0054] Further, the shot blasting device further comprises a feeding overhead rail 7, which is suspended on the upper side of the shot blasting box 2 through a plurality of columns;

[0055] The feeding overhead rail 7 comprises two straight tracks and two semicircular tracks, and the tracks are closed and connected to form a ring structure;

[0056] One of the straight tracks is located directly above the avoiding groove 5; the cross section of the feeding overhead rail 7 is arranged in an I-shaped structure, that is, the feeding overhead rail 7 comprises an upper wing plate, a rib plate and a lower wing plate; a plurality of sliding seats 8 are slidingly arranged on the feeding overhead rail 7, and a driving module is further arranged on the sliding seat 8;

[0057] The sliding seat 8 comprises a base plate, support plates 23 are arranged on both sides of the base plate along the length direction of the base plate, a plurality of rolling wheels 22 are arranged on the support plates 23, each of the rolling wheels 22 is located between the upper wing plate and the lower wing plate, and each of the rolling wheels 22 abuts the top surface of the lower wing plate;

[0058] Further, the top surface of each of the lower wing plates is further provided with a limiting track, and a limiting groove is arranged on each of the rolling wheels 22, and the limiting groove is connected to the limiting track in a clamping manner;

[0059] Further, the driving module comprises a driving motor 19, the driving motor 19 is arranged on the base plate, a driving gear 21 is arranged on the output shaft of the driving motor 19, and a driving rack 20 is arranged at the bottom of the feeding overhead rail 7, and the driving gear 21 is engaged with the driving rack 20;

[0060] Further, a T-shaped hole is arranged on the sliding seat 8, a thrust ball bearing 29 is arranged in the T-shaped hole, an adjusting rod 24 is further arranged on the sliding seat 8, one end of the adjusting rod 24 is provided with a pressing plate 30, and the other end of the adjusting rod 24 is arranged vertically downward through the T-shaped hole; the pressing plate 30 is pressed against the thrust ball bearing 29;

[0061] The free end of the adjusting rod 24 is also provided with a connecting tenon groove 27, the shot blasting device further comprises a rotating rod 9, one end of the rotating rod 9 is provided with a connecting tenon head 26 matched with the connecting tenon groove 27 along the axis of the rotating rod 9, and a limiting rod 28 inserted into the connecting tenon groove 27 is also screwed on the adjusting rod; and the bottom end of the rotating rod 9 is provided with a connecting disc 25 for connecting the brake drum to be processed;

[0062] The connecting tenon groove 27 is a dovetail groove or a T-shaped groove structure;

[0063] In use, the connection of the rotating rod 9 and the adjusting rod 24 is realized through the clamping of the connecting tenon groove 27 and the connecting tenon head 26, and it should be noted that the connecting tenon groove 27 is closed at one end and open at the other end along the radial direction of the adjusting rod 24; and the open end is provided with a limiting rod 28;

[0064] When the rotating rod 9 is connected with the adjusting rod 24, the limiting rod 28 is rotated so that its free end is inserted into the connecting tenon groove 27, thereby limiting the rotating rod 9 in the radial direction;

[0065] The above structure is simple and reliable, and at the same time, the staff can realize the quick replacement of the brake drum to be processed by replacing the connecting rod, thereby effectively improving the replacement efficiency of the brake drum.

[0066] Further, the bottom of the sliding seat 8 is also provided with a stabilizing frame 31, and a rolling bearing 32 is arranged between the stabilizing frame 31 and the adjusting rod 24;

[0067] The rolling bearing 32 and the thrust ball bearing 29 can realize two-point positioning of the adjusting rod 24, which can effectively ensure the axial stability of the adjusting rod 24 and avoid its deviation, thereby ensuring the rotational stability of the brake drum to be processed and ensuring that the steel balls shot by the shot blasting device 6 can always be in contact with the surface of the brake drum to be processed, thereby avoiding the occurrence of a processing blind area.

[0068] Compared with the prior art, the shot blasting device can realize the shot blasting processing of the entire outer surface of the brake drum, thereby effectively simplifying the structure of the entire device and reducing the hardware cost of the device;

[0069] Secondly, the application realizes the pulse continuous production of the brake drum, and compared with the traditional processing method, the time-consuming disassembly and assembly process of the parts to be processed is cancelled, the shot blasting processing can be continuously carried out, and the efficiency of the shot blasting processing is improved;

[0070] Finally, since the application can continuously carry out the shot blasting operation, it is no longer necessary to frequently start and stop the shot blasting device, which not only improves the processing efficiency, but also ensures the consistency of the shot blasting speed, which is beneficial to improving the processing quality.

[0071] The above merely provides the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent flow transformation made according to the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A shot blasting device for brake drums, characterized in that It includes a rack (1); A shot blasting box (2) is arranged on the rack (1), the shot blasting box (2) is provided with a feeding port (3) and a discharging port (4); the top of the shot blasting box (2) is further provided with an avoiding groove (5), the avoiding groove (5) is communicated with the feeding port (3) and the discharging port (4); A plurality of shot blasting devices (6) are arranged on the shot blasting box (2), and the projection surface of each shot blasting device (2) is tangent to the outer circumferential surface of the brake drum to be processed. A feeding overhead rail (7) is provided with a plurality of sliding seats (8) slidingly arranged thereon, each sliding seat (8) is provided with a driving module for driving the sliding seat (8) to slide on the feeding overhead rail (7); a rotating rod (9) for mounting the brake drum to be processed is rotatably arranged on each sliding seat (8).

2. A shot blasting device for brake drums according to claim 1, characterized in that The feeding port (3) and the discharging port (4) are provided with a shielding curtain (10); the two sides of the avoiding groove (5) are provided with shielding plates (11), and the two shielding plates (11) are spliced with each other to close the avoiding groove (5).

3. The shot blasting device of claim 1, wherein, Along the moving direction of the brake drum to be processed, each shot blasting device (6) is arranged on the two sides of the brake drum to be processed; the projection surface of each shot blasting device (2) is tangent to the outer circumferential surface of the brake drum to be processed, and the direction of the force of each shot blasting device (6) on the brake drum to be processed is the same.

4. The device according to claim 1, wherein A control console (12) is further arranged on the shot blasting box (2), a rotating seat (13) is rotatably arranged on the control console (12), a clamping seat (14) is arranged on the rotating seat (13); the outlet end of the shot blasting device (6) is deeply arranged in the shot blasting box (2), and the other end is connected with the clamping seat (14); a locking module is further arranged between the rotating seat (13) and the shot blasting box (2).

5. A shot blasting device according to claim 4, wherein The locking module comprises an adjusting groove (15) in arc structure, the adjusting groove (15) is arranged on the control console (12), a locking screw (16) matched with the adjusting groove (15) is arranged on the rotating seat (13), and a fixing block (17) is threadedly connected with the locking screw (16).

6. The device according to claim 1 or 4, wherein The outlet end of the shot blasting device (6) is further provided with a flexible sealing cover (18).

7. The device according to claim 1, wherein The driving module comprises a driving motor (19), a driving rack (20) is arranged on the feeding overhead rail (7), a driving gear (21) matched with the driving rack (20) is arranged on the driving motor (19); a plurality of rolling wheels (22) respectively connected with the overhead rail are arranged on the sliding seat (8).

8. A shot blasting device according to claim 7, wherein The cross section of the feeding overhead rail (7) is in I-shaped structure, the driving rack (20) is arranged on the bottom surface of the feeding overhead rail (7); the two sides of the sliding seat (8) are provided with supporting plates (23), and each rolling wheel (22) is rotatably arranged on the two supporting plates (23).

9. A shot blasting device according to claim 7, characterized in that The rotation adjusting rod (24) is arranged on the slide (8), one end of the rotation rod (9) is provided with a connecting disc (25) matched with the brake drum to be processed, the other end of the rotation rod (9) is provided with a connecting tenon (26), the adjusting rod (24) is provided with a connecting tenon groove (27) matched with the connecting tenon (26), and the adjusting rod (24) is further screw-connected with a limiting rod (28) inserted into the connecting tenon groove (27).

10. A shot blasting device according to claim 9, wherein The slide (8) is provided with a thrust ball bearing (29), the adjusting rod (24) is provided with an extrusion plate (30) matched with the thrust ball bearing (29), and the bottom of the slide (8) is further provided with a stabilizing frame (31), and the stabilizing frame (31) and the adjusting rod (24) are provided with a rolling bearing (32).