A clamping mechanism for internal hole sandblasting

Abstract

This utility model provides a clamping mechanism for internal hole sandblasting, comprising: a sandblasting box, the bottom of which is connected to a material receiving hopper, a shielding net fixedly connected to the upper end of the inner wall of the material receiving hopper, a control seat fixedly connected to the rear end of the inner wall of the sandblasting box, and a bearing seat fixedly connected to the bottom of the control seat; a driving unit, which is mounted on the control seat and the sandblasting box, and an assembly seat fixedly connected to the driving unit, with a sandblasting head mounted at the front end of the assembly seat; and a transmission unit, which is mounted inside the bearing seat and connected to the driving unit. This clamping mechanism for internal hole sandblasting, through the driving unit, controls the vertical movement of the sandblasting head, while simultaneously driving the fixed unit to rotate through the transmission unit, achieving uniform sandblasting of the workpiece's inner hole. During sandblasting, the sealing part dynamically seals the top of the workpiece's inner hole, reducing sand leakage and preventing equipment jamming and frequent shutdowns for cleaning.

Description

Technical Field

[0001] This utility model relates to the field of internal hole sandblasting technology, and more specifically, to a clamping mechanism for internal hole sandblasting. Background Technology

[0002] Sandblasting is a process that uses compressed air to propel abrasive particles at high speed onto the surface of a workpiece. Through the impact and abrasive action of the abrasive stream, the workpiece surface achieves a certain level of cleanliness and varying degrees of roughness. Sandblasting is commonly used for rust removal and oxide scale removal, and is a pretreatment process before painting and machining. Internal hole sandblasting is a key surface treatment process, requiring a clamping mechanism to position the workpiece during application.

[0003] However, existing clamping mechanisms have some defects or shortcomings:

[0004] Existing clamping mechanisms struggle to balance clamping stability and sealing during sandblasting of workpiece inner holes. They cannot effectively seal the top of the workpiece inner hole, and traditional rubber seals are prone to wear when the workpiece rotates or moves, leading to abrasive leakage and equipment jamming, requiring frequent shutdowns for cleaning. Furthermore, they have poor clamping adaptability, failing to effectively position irregularly shaped workpieces and making them unsuitable for multi-variety, small-batch production. Utility Model Content

[0005] The purpose of this invention is to provide a clamping mechanism for internal hole sandblasting to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides a clamping mechanism for internal hole sandblasting, comprising: a sandblasting box, a material receiving hopper connected to the bottom of the sandblasting box, a shielding net fixedly connected to the upper end of the inner wall of the material receiving hopper, a control seat fixedly connected to the rear end of the inner wall of the sandblasting box, and a bearing seat fixedly connected to the bottom of the control seat;

[0007] A drive unit is mounted on the control base and the sandblasting box. An assembly base is fixedly connected to the drive unit, and a sandblasting head is mounted on the front end of the assembly base.

[0008] A transmission unit, which is installed inside the bearing seat and connected to the drive unit;

[0009] A fixing part is rotatably mounted above the bearing seat and connected to the transmission part;

[0010] A sealing part is installed at the lower end of the control base and is movably sleeved on the outside of the sandblasting head;

[0011] The drive unit drives the mounting base to move the sandblasting head vertically, while the fixing part rotates in cooperation with the transmission unit.

[0012] Furthermore, the fixing part includes a fixed disk rotatably mounted on the bearing seat; a bidirectional lead screw rotatably mounted in the fixed disk; a handle fixed to one end of the bidirectional lead screw; two control slots symmetrically formed on the upper surface of the fixed disk; two control blocks slidably mounted in the two control slots and threadedly connected to both ends of the bidirectional lead screw; two fixing blocks fixed to the upper surfaces of the two control blocks, and two V-shaped grooves formed on the two fixing blocks; and two wedge-shaped guide grooves symmetrically formed on the upper surface of the fixed disk.

[0013] The two wedge-shaped guide grooves and the two control grooves are arranged perpendicular to each other.

[0014] Furthermore, the drive unit includes a drive motor fixed to the top of the sandblasting box; a drive screw fixed to the output end of the drive motor and rotatably installed in the control seat; a slide groove formed on the control seat; a drive slider slidably installed in the slide groove and threadedly connected to the drive screw; and a baffle fixed on the drive slider and used to block the slide groove.

[0015] The mounting base is fixed to the front end of the drive slider.

[0016] Furthermore, the transmission unit includes a transmission cavity formed within the support seat; a first transmission gear and a second transmission gear rotatably mounted within the transmission cavity; a transmission toothed belt meshing with and sleeved on the outside of the first transmission gear and the second transmission gear; and a transmission rod rotatably mounted within the support seat and fixedly connected at both ends to the second transmission gear and the fixed disc, respectively.

[0017] The lower end of the drive screw is fixedly connected to the first transmission gear.

[0018] Furthermore, the closure includes a plurality of guide grooves arranged in a ring array on the mounting base; a plurality of guide rods respectively fitted and slidably inserted into the plurality of guide grooves; a lower pressure plate fixed to the bottom of the plurality of guide rods and movably sleeved on the outside of the sandblasting head; and a closing ring rotatably mounted on the bottom of the lower pressure plate and movably sleeved on the outside of the sandblasting head via a bearing.

[0019] Furthermore, the sealing part also includes a return spring that is movably sleeved on the outside of the sandblasting head and whose two ends are fixedly connected to the upper surface of the lower pressure plate and the lower surface of the mounting base, respectively; and a rubber pad fixedly connected to the lower surface of the sealing ring.

[0020] Furthermore, the support base and the fixed plate are provided with air supply channels that communicate with the two control channels. There are air passage gaps between the two control blocks and the bottom of the two control channels. An air inlet pipe is installed on the support base, with one end connected to the air supply channel and the other end connected to the dust removal system outside the sandblasting box.

[0021] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0022] This internal hole sandblasting clamping mechanism, through the cooperation of the bidirectional lead screw in the fixing part and the V-grooves on the two fixing blocks, can realize the rapid clamping of workpieces of different diameters and complete the rapid alignment of the internal hole of the workpiece, ensuring processing efficiency. When performing internal hole sandblasting of irregular workpieces, under the control of the drive part, the mounting seat can drive the closing part to move down and contact the workpiece. Then, under the elastic force of the return spring, the workpiece is pressed, realizing the positioning of the internal hole sandblasting process of irregular workpieces. This facilitates the processing of various types of workpieces and ensures the practicality of the clamping mechanism.

[0023] This internal blasting clamping mechanism, through its enclosed section, maintains the sealing ring's position on the top of the workpiece's inner hole during blasting operations. The sealing ring is connected to the lower pressure plate via a bearing, allowing it to rotate along with the workpiece, thus achieving dynamic sealing of the inner hole's top. This ensures synchronous sealing during processing, effectively reducing wear and extending service life while maintaining a tight seal. Simultaneously, an external dust removal system is connected via an air delivery channel, maintaining negative pressure in the two control channels and blocking the abrasive from entering the bidirectional lead screw. This effectively prevents contamination from processing abrasive and dust, ensuring normal equipment operation and minimizing frequent maintenance by operators. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 A perspective view of the present invention is shown;

[0026] Figure 2 A partial perspective view of the present invention is shown;

[0027] Figure 3 This invention provides a partially cross-sectional perspective view. Figure 1 ;

[0028] Figure 4 A partially disassembled perspective view of this utility model is shown;

[0029] Figure 5 This invention provides a partially cross-sectional perspective view. Figure 2;

[0030] Figure 6 This invention provides a partially cross-sectional perspective view. Figure 3 .

[0031] In the picture

[0032] 1. Sandblasting box; 2. Material hopper; 3. Shielding net; 4. Control seat; 5. Bearing seat; 6. Drive unit; 7. Transmission unit; 8. Fixing unit; 9. Sealing unit; 10. Fixing plate; 11. Two-way lead screw; 12. Handle; 13. Control groove; 14. Control block; 15. Fixing block; 16. V-groove; 17. Wedge-shaped guide groove; 18. Drive motor; 19. Drive lead screw; 20. Slide groove; 21. Drive slider; 22. Baffle; 23. Transmission cavity; 24. First transmission gear; 25. Second transmission gear; 26. Transmission toothed belt; 27. Transmission rod; 28. Guide groove; 29. ​​Guide rod; 30. Lower pressure plate; 31. Sealing ring; 32. Return spring; 33. Rubber pad; 34. Air supply groove; 35. Air inlet pipe; 36. Assembly seat; 37. Sandblasting head. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0034] like Figure 1-6 As shown, a clamping mechanism for internal hole sandblasting includes: a sandblasting box 1, a material receiving hopper 2 connected to the bottom of the sandblasting box 1, a shielding net 3 fixedly connected to the upper end of the inner wall of the material receiving hopper 2, a control seat 4 fixedly connected to the rear end of the inner wall of the sandblasting box 1, and a bearing seat 5 fixedly connected to the bottom of the control seat 4.

[0035] Drive unit 6, which is mounted on the control base 4 and the sandblasting box 1. A mounting base 36 is fixedly connected to the drive unit 6, and a sandblasting head 37 is mounted on the front end of the mounting base 36.

[0036] Transmission unit 7, which is installed in the bearing seat 5 and connected to the drive unit 6;

[0037] The fixing part 8 is rotatably mounted above the bearing seat 5 and connected to the transmission part 7;

[0038] The sealing part 9 is installed at the lower end of the control seat 4 and is movably sleeved on the outside of the sandblasting head 37;

[0039] The drive unit 6 is driven, and the mounting base 36 drives the sandblasting head 37 to move vertically. At the same time, with the cooperation of the transmission unit 7, the fixing part 8 rotates.

[0040] In use, the workpiece to be processed is placed on the fixed plate 10. At this time, by rotating the bidirectional lead screw 11, the two fixed blocks 15 are driven to move closer to each other, so that the two V-shaped grooves 16 clamp the outer wall of the workpiece, realizing the self-centering fixation of the workpiece and facilitating the quick clamping of workpieces of different diameters. When processing irregularly shaped workpieces, the drive unit 6 controls the assembly seat 36 to drive the closing part 9 to move down and contact the workpiece. Then, under the elastic force of the return spring 32, the workpiece is pressed, realizing the positioning of the irregularly shaped workpiece in the sandblasting process. This facilitates the processing of various types of workpieces and ensures the practicality of the clamping mechanism. When the workpiece rotates and the inner hole is sandblasted, the sand in the inner hole can be thrown out through the two wedge-shaped guide grooves 17 under the action of centrifugal force and fall into the receiving hopper 2 through the shielding net 3. This facilitates centralized collection and recycling, and prevents the accumulation of sand in the inner hole. This avoids the accumulation of sand affecting the sandblasting operation of the inner hole, and also avoids the need for workers to clean the sand on the fixed plate 10 when placing the workpiece, reducing labor intensity.

[0041] During sandblasting, the drive unit 6 drives the drive screw 19 to rotate via the drive motor 18, causing the sandblasting head 37 to move vertically along the axial direction and approach the workpiece. Simultaneously, with the cooperation of the transmission unit 7, the rotational motion of the drive screw 19 is converted into the rotation of the fixed disk 10, enabling rotation during the sandblasting of the workpiece's inner hole. This ensures uniform sandblasting coverage and improves the workpiece's machining accuracy. Furthermore, when the sandblasting head 37 moves downwards for inner hole sandblasting, the sealing unit 9 presses the sealing ring 31 with the return spring 32, forming a radial seal to prevent abrasive splashing and to ensure proper sealing. Ring 31 is rotatably connected to the lower pressure plate 30 via a bearing, so that the sealing ring 31 can rotate together with the workpiece, thereby achieving dynamic sealing of the top of the inner hole, ensuring synchronous shielding during the processing, effectively reducing wear while ensuring sealing effect, and ensuring service life. Meanwhile, the two control slots 13 of the fixed part 8 are maintained under negative pressure by an external dust removal system, blocking the path of abrasive to enter the bidirectional lead screw 11, thereby effectively reducing the interference of abrasive on the mechanism, avoiding structural jamming, eliminating the need for frequent shutdowns for cleaning, and reducing maintenance costs.

[0042] Optionally, the fixing part 8 includes a fixing disk 10 rotatably mounted on the bearing seat 5; a bidirectional lead screw 11 rotatably mounted in the fixing disk 10; a handle 12 fixed to one end of the bidirectional lead screw 11; two control slots 13 symmetrically opened on the upper surface of the fixing disk 10; two control blocks 14 slidably mounted in the two control slots 13 and threadedly connected to both ends of the bidirectional lead screw 11; two fixing blocks 15 fixed on the upper surface of the two control blocks 14, and two V-shaped grooves 16 opened on the two fixing blocks 15; and two wedge-shaped guide grooves 17 symmetrically opened on the upper surface of the fixing disk 10.

[0043] The two wedge-shaped guide grooves 17 and the two control grooves 13 are arranged perpendicularly to each other;

[0044] In use, the workpiece to be processed can be placed on the fixed plate 10 between the two fixed blocks 15. Then, by rotating the double-acting screw 11 via the handle 12, the two control blocks 14 move within the two control slots 13, causing the two fixed blocks 15 to move closer together to clamp the workpiece. Since both fixed blocks 15 have V-grooves 16, when clamping the workpiece, the V-grooves 16 contact the outer wall of the workpiece, achieving automatic alignment and ensuring that the inner hole of the workpiece is aligned with the sandblasting head 37, avoiding... The sandblasting head 37 is misaligned with the inner hole of the workpiece, affecting the normal sandblasting operation of the inner hole. The design of the two V-shaped grooves 16 facilitates the effective clamping and positioning of workpieces of different sizes by the fixing part 8, improving practicality. In the sandblasting operation of the inner hole of the workpiece, the abrasive can slide off the fixing plate 10 through the two wedge-shaped guide grooves 17. When the fixing plate 10 rotates, the wedge-shaped guide grooves 17 throw the splashed abrasive out along the tangential direction, effectively avoiding the accumulation of abrasive on the fixing plate 10, facilitating the clamping operation of the fixing part 8 on the workpiece, and facilitating the recycling of abrasive.

[0045] Optionally, the drive unit 6 includes a drive motor 18 fixed to the top of the sandblasting box 1; a drive screw 19 fixed to the output end of the drive motor 18 and rotatably installed in the control seat 4; a slide groove 20 formed on the control seat 4; a drive slider 21 slidably installed in the slide groove 20 and threadedly connected to the drive screw 19; and a baffle 22 fixed on the drive slider 21 and used to block the slide groove 20.

[0046] The mounting base 36 is fixed to the front end of the drive slider 21. When in use, the drive motor 18 works to control the drive screw 19 to rotate, thereby controlling the drive slider 21 to slide in the slide groove 20, driving the mounting base 36 to move vertically, so that the sandblasting head 37 on the mounting base 36 can approach or move away from the workpiece.

[0047] Optionally, the transmission part 7 includes a transmission cavity 23 opened in the bearing seat 5; a first transmission gear 24 and a second transmission gear 25 rotatably installed in the transmission cavity 23; a transmission toothed belt 26 meshing and sleeved on the outside of the first transmission gear 24 and the second transmission gear 25; and a transmission rod 27 rotatably installed in the bearing seat 5 and fixedly connected at both ends to the second transmission gear 25 and the fixed disk 10, respectively.

[0048] The lower end of the drive screw 19 is fixedly connected to the first transmission gear 24. When the drive unit 6 operates, the drive screw 19 rotates, which in turn drives the first transmission gear 24 to rotate. Under the meshing transmission of the transmission belt 26, the first transmission gear 24 rotates, which in turn drives the second transmission gear 25 to rotate. With the cooperation of the transmission rod 27, the fixed part 8 rotates, allowing the workpiece fixed by the fixed part 8 to rotate while the sandblasting head 37 moves vertically. This ensures the uniformity of sandblasting of the inner hole of the workpiece. The size and tooth ratio of the first transmission gear 24 and the second transmission gear 25 can be adjusted as needed to optimize the matching between the workpiece rotation speed and the feed speed of the sandblasting head 37. This ensures that when the sandblasting head 37 moves a short vertical distance, the workpiece fixed by the fixed part 8 can rotate a large angle, ensuring the uniformity of sandblasting coverage of the inner hole of the workpiece and improving processing accuracy. Furthermore, under the control of a single drive motor 18, the vertical movement of the sandblasting head 37 and the rotation of the workpiece are synchronized, reducing the failure rate and energy consumption.

[0049] Optionally, the closure 9 includes a plurality of guide grooves 28 arranged in a ring array on the mounting base 36; a plurality of guide rods 29 respectively fitted and slidably inserted into the plurality of guide grooves 28; a lower pressure plate 30 fixed to the bottom of the plurality of guide rods 29 and movably sleeved on the outside of the sandblasting head 37; and a closing ring 31 rotatably mounted on the bottom of the lower pressure plate 30 via bearings and movably sleeved on the outside of the sandblasting head 37.

[0050] Optionally, the sealing part 9 also includes a return spring 32 that is movably sleeved on the outside of the sandblasting head 37 and whose two ends are fixedly connected to the upper surface of the lower pressure plate 30 and the lower surface of the mounting base 36 respectively; and a rubber pad 33 fixedly connected to the lower surface of the sealing ring 31.

[0051] During the process of the drive unit 6 controlling the assembly seat 36 to move the sandblasting head 37 downward and enter the inner hole of the workpiece to be processed, the rubber pad 33 at the bottom of the sealing ring 31 first abuts against the workpiece. As the assembly seat 36 continues to move downward, it compresses the return spring 32 and ensures that the rubber pad 33 at the bottom of the sealing ring 31 presses tightly against the inner hole of the workpiece. When the workpiece rotates, since the sealing ring 31 is connected to the lower pressure plate 30 through a bearing, the sealing ring 31 can rotate with the workpiece without affecting the lower pressure plate 30. The several guide rods 29 move along several guide grooves 28 when the assembly seat 36 moves vertically, ensuring the stability of the lower pressure plate 30 when it moves vertically relative to the assembly seat 36 and preventing it from tilting. Furthermore, when the sandblasting head 37 is sandblasting the inner hole of the workpiece, the sealing ring 31 can continuously keep the top of the inner hole of the workpiece closed, effectively preventing the abrasive and dust from being directly ejected from the top of the inner hole of the workpiece during sandblasting and reducing the interference of abrasive and dust on the mechanical structure of the equipment.

[0052] Optionally, the bearing seat 5 and the fixed plate 10 are provided with air supply channels 34 that are connected to the two control channels 13. There is an air passage gap between the two control blocks 14 and the bottom of the two control channels 13 respectively. An air inlet pipe 35 is installed on the bearing seat 5, with one end connected to the air supply channel 34 and the other end connected to the dust removal system outside the sandblasting box 1.

[0053] In use, the clean airflow of the external dust removal system can be delivered to the air delivery trough 34 through the air inlet pipe 35, and then enter the two control troughs 13. With the cooperation of the air passage gap, the airflow can be at any position in the two control troughs 13. The reverse airflow barrier in the two control troughs 13 effectively blocks the abrasive and dust falling into the two control troughs 13, effectively extends the service life of the bidirectional lead screw 11, reduces the failure rate during use, and does not require frequent shutdown for cleaning, making it convenient to use.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping mechanism for internal hole sandblasting, characterized in that, include: A sandblasting box (1) is connected to a material receiving hopper (2) at the bottom. A shielding net (3) is fixedly connected to the upper end of the inner wall of the material receiving hopper (2). A control seat (4) is fixedly connected to the rear end of the inner wall of the sandblasting box (1). A bearing seat (5) is fixedly connected to the bottom of the control seat (4). Drive unit (6), the drive unit (6) is installed on the control seat (4) and the sandblasting box (1), and an assembly seat (36) is fixedly connected to the drive unit (6), and a sandblasting head (37) is installed at the front end of the assembly seat (36). Transmission unit (7), which is installed in the bearing seat (5) and connected to the drive unit (6); The fixing part (8) is rotatably mounted above the bearing seat (5) and connected to the transmission part (7); The sealing part (9) is installed at the lower end of the control seat (4) and is movably sleeved on the outside of the sandblasting head (37); The drive unit (6) is driven, and the mounting base (36) drives the sandblasting head (37) to move vertically. At the same time, with the cooperation of the transmission unit (7), the fixing part (8) rotates.

2. The clamping mechanism for internal hole sandblasting as described in claim 1, characterized in that, The fixing part (8) includes a fixing plate (10) rotatably mounted on the bearing seat (5); a bidirectional lead screw (11) rotatably mounted in the fixing plate (10); a handle (12) fixed to one end of the bidirectional lead screw (11); two control slots (13) symmetrically opened on the upper surface of the fixing plate (10); two control blocks (14) slidably mounted in the two control slots (13) and threadedly connected to both ends of the bidirectional lead screw (11); two fixing blocks (15) fixed on the upper surface of the two control blocks (14) respectively, and two V-shaped grooves (16) opened on the two fixing blocks (15) respectively; and two wedge-shaped guide grooves (17) symmetrically opened on the upper surface of the fixing plate (10). The two wedge-shaped guide grooves (17) and the two control grooves (13) are arranged perpendicular to each other.

3. The clamping mechanism for internal hole sandblasting as described in claim 2, characterized in that, The drive unit (6) includes a drive motor (18) fixed to the top of the sandblasting box (1); a drive screw (19) fixed to the output end of the drive motor (18) and rotatably installed in the control seat (4); a slide groove (20) opened on the control seat (4); a drive slider (21) slidably installed in the slide groove (20) and threadedly connected to the drive screw (19); and a baffle (22) fixed on the drive slider (21) and used to block the slide groove (20). The mounting base (36) is fixed to the front end of the drive slider (21).

4. The clamping mechanism for internal hole sandblasting as described in claim 3, characterized in that, The transmission unit (7) includes a transmission cavity (23) opened in the bearing seat (5); a first transmission gear (24) and a second transmission gear (25) rotatably installed in the transmission cavity (23); a transmission toothed belt (26) meshing and sleeved on the outside of the first transmission gear (24) and the second transmission gear (25); and a transmission rod (27) rotatably installed in the bearing seat (5) and fixedly connected at both ends to the second transmission gear (25) and the fixed plate (10) respectively. The lower end of the drive screw (19) is fixedly connected to the first transmission gear (24).

5. The clamping mechanism for internal hole sandblasting as described in claim 1, characterized in that, The closed part (9) includes a plurality of guide grooves (28) arranged in a ring array on the mounting base (36); a plurality of guide rods (29) respectively fitted and slidably inserted in the plurality of guide grooves (28); a lower pressure plate (30) fixed to the bottom of the plurality of guide rods (29) and movably sleeved on the outside of the sandblasting head (37); and a closing ring (31) rotatably mounted on the bottom of the lower pressure plate (30) and movably sleeved on the outside of the sandblasting head (37) via a bearing.

6. The clamping mechanism for internal hole sandblasting as described in claim 5, characterized in that, The closed part (9) also includes a return spring (32) that is movably sleeved outside the sandblasting head (37) and whose two ends are fixedly connected to the upper surface of the lower pressure plate (30) and the lower surface of the mounting base (36) respectively; and a rubber pad (33) fixedly connected to the lower surface of the closed ring (31).

7. The clamping mechanism for internal hole sandblasting as described in claim 2, characterized in that, The bearing seat (5) and the fixed plate (10) are provided with air supply channels (34) that are connected to the two control channels (13). There is a ventilation gap between the two control blocks (14) and the bottom of the two control channels (13). An air inlet pipe (35) is installed on the bearing seat (5), with one end connected to the air supply channel (34) and the other end connected to the dust removal system outside the sandblasting box (1).

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