A barrel-type sandblasting machine

Abstract

The application discloses a drum-type sand blasting machine and relates to the technical field of sand blasting machines.The drum-type sand blasting machine comprises a shell, a connecting shell and a supporting assembly are installed on the shell, a collecting box is arranged below the shell, a sand blasting assembly and a traction assembly are installed on the top of the shell, a first drum is installed on the supporting assembly, a second drum is connected to the first drum, an inner drum is rotatably arranged in the second drum, an adjusting assembly is installed between the second drum and the inner drum, and through holes are uniformly formed in the second drum and the inner drum.The drum-type sand blasting machine has the function of convenient discharging, the traction assembly is gradually loosened when the connecting assembly is pulled, and the second connecting shell rotates through the ball cover under the action of gravity after the connecting assembly is completely separated from the two second drums, so that the workpiece after sand blasting treatment is automatically poured out, and the convenience of the device in use is improved.

Description

Technical Field

[0001] This invention relates to the field of sandblasting machine technology, specifically a drum-type sandblasting machine. Background Technology

[0002] A sandblasting machine is a device that uses high-pressure airflow to propel granular media such as sand, glass beads, or corundum onto the surface of a workpiece. The impact and friction between the particles and the surface allow for surface cleaning, polishing, deburring, rust removal, and coating treatments. Sandblasting machines are widely used in metal processing, shipbuilding, aerospace, and automotive industries, effectively improving the surface roughness of workpieces, enhancing adhesion, and improving their appearance and performance.

[0003] Existing sandblasting machines still have some shortcomings. For example, the invention patent with publication number CN109807756B discloses a sandblasting machine, including a machine shell with a working chamber. The working chamber is equipped with a lower roller, an upper roller, a support belt wrapped around the lower roller and the upper roller, a shaping wheel located between the upper roller and the lower roller, and a first power component that drives the upper roller to rotate. There are at least two shaping wheels, which are respectively close to both sides of the support belt. The outer surface of the support belt wraps around the circumferential surface of the shaping wheel and forms a material placement area for placing workpieces. The surface of the support belt is hollowed out with multiple material drop holes for sand to pass through. A sandblasting mechanism with nozzles facing the material placement area is provided above the material placement area. It has the advantages of eliminating the restriction on the shape of the workpiece, batch sandblasting of various surfaces of the workpiece, and high sandblasting quality and uniform coverage. The above-mentioned device achieves the sandblasting function through a curved conveyor belt. However, during use, the sandblasted particles cause wear on the flexible material feeding conveyor belt, affecting the service life of the device. Existing sandblasting machines cannot adaptively adjust the size of the discharge hole according to the abrasive and workpiece size, making it inconvenient to clean up the remaining abrasive in the feeding area afterward.

[0004] Patent CN112077751B discloses a glass sandblasting machine, including a sandblasting box, a conveying assembly, a first drive assembly, a second drive assembly, and a sandblasting assembly. The conveying assembly is used to feed glass plates into the sandblasting box and includes a conveyor frame and a conveyor belt mounted on the conveyor frame. The sandblasting box is mounted on the outside of the conveyor frame. The left side wall of the sandblasting box has an inlet at the conveyor frame, and the right side wall has an outlet at the conveyor frame. The first drive assembly is located inside the sandblasting box and above the conveyor belt. Each side plate is provided with an adjustment assembly for controlling the distance between the first and second partitions. The second drive assembly is equipped with the sandblasting assembly and is used to drive the sandblasting assembly to move in a direction perpendicular to the conveyor belt. While this device eliminates the need for film removal and application during sandblasting, it does not allow for convenient cleaning of residual abrasive material inside the device or removal of the processed workpiece during use. Summary of the Invention

[0005] The purpose of this invention is to provide a drum-type sandblasting machine to solve the problem that existing sandblasting machines cannot easily discharge materials and adjust the size of the discharge hole.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drum-type sandblasting machine, comprising a housing, a connecting shell and a support assembly mounted on the housing, a collection box placed below the housing, a sandblasting assembly and a traction assembly mounted on the top of the housing, a first drum mounted on the support assembly, a second drum connected to the first drum, an inner cylinder rotatably disposed inside the second drum, an adjustment assembly installed between the second drum and the inner cylinder, through holes and rubber protrusions provided on both the second drum and the inner cylinder, a connecting assembly provided between two adjacent second drums, and a drive assembly installed between the connecting assembly and the traction assembly;

[0007] The support assembly includes a fixing ring and a bushing installed on both sides of the outer shell. A ball cover is rotatably installed inside the bushing. A sandblasting pipe is connected to the ball cover. A guide pipe is provided on the outside of the sandblasting pipe. The sandblasting assembly includes an abrasive box and an air pump installed on the top of the outer shell.

[0008] As a further embodiment of the present invention: openings for the first roller to rotate are provided on both sides of the outer shell, the first roller, the second roller and the inner cylinder are symmetrically distributed on both sides of the connecting assembly, a connecting ring is fixedly connected to the first roller, the ball cover and the connecting ring are rotatably connected, and an extension bracket is installed on the bushing.

[0009] As a further embodiment of the present invention: the spherical cover, the sandblasting pipe, the guide pipe and the abrasive box are interconnected, the side of the sandblasting pipe near the guide pipe is arc-shaped, the guide pipe and the abrasive box are rotatably connected, a fixing pipe is installed on the abrasive box, a connecting pipe is attached to the fixing pipe, the connecting pipe is connected to the guide pipe, and a clamping rod is attached to the connecting pipe and the fixing pipe.

[0010] As a further embodiment of the present invention: the traction assembly includes a guide rail installed on the top of the housing, a pressure plate slidably installed on the outer side of the guide rail, a sliding plate abutting on both sides of the pressure plate, a push plate installed on the sliding plate, a connecting frame provided above the pressure plate, connecting belts slidably installed on both sides of the connecting frame, a spring fixedly provided between two adjacent connecting belts, and the upper connecting belt connected to the drive assembly.

[0011] As a further embodiment of the present invention: the surfaces of the pressure plate and the sliding plate that abut against each other are both inclined surfaces, and the position of the push plate corresponds to the position of the sandblasting pipe.

[0012] As a further embodiment of the present invention: the driving assembly includes a first motor mounted on the connecting shell, a first gear fixedly mounted on the output shaft of the first motor, a first rack meshing with the first gear, the first rack slidably mounted inside the connecting shell, connecting rods fixedly mounted on both sides of the first rack, the connecting rods being connected to a connecting belt located above the connecting frame, and a movable plate connected to the first rack, the movable plate being connected to the connecting assembly.

[0013] As a further embodiment of the present invention: the movable plate and the connecting shell are fitted together, and a guide plate is fixedly connected inside the connecting shell, with the guide plates symmetrically distributed on both sides of the movable plate.

[0014] As a further embodiment of the present invention: the connecting assembly includes a sealing cover fixedly connected to the movable plate, a middle cylinder rotatably mounted on the sealing cover, a third roller fixedly provided on both sides of the middle cylinder, a protective shell mounted on the sealing cover, a second motor installed inside the protective shell, a connecting shaft connected to the output shaft of the second motor, and a drive wheel mounted on the connecting shaft.

[0015] As a further embodiment of the present invention: the drive wheel is made of rubber, and there is frictional contact between the drive wheel and the middle cylinder, and the sealing cover is in close contact with the middle cylinder.

[0016] As a further embodiment of the present invention: the adjustment assembly includes a fixing plate installed on the inner cylinder, a connecting cover and an electromagnetic brake motor installed on the fixing plate, a second gear fixedly connected to the output shaft of the electromagnetic brake motor, a second rack meshing with the second gear, and the second rack connected to the second roller.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By setting up connecting and supporting components, the device can automatically discharge residual abrasive and workpiece. After sandblasting is completed, the first motor drives the first gear to rotate, which in turn drives the first rack to pull the movable plate and the sealing cover to move. The sealing cover causes the middle cylinder and the third roller to disengage from the two adjacent second rollers, so that the first roller, the second roller and the inner cylinder rotate under their own gravity through the ball cover, which automatically discharges the residual abrasive and the processed workpiece in the inner cylinder, enhancing the convenience of the device.

[0019] By configuring a first roller, a second roller, an inner cylinder, and an adjustment assembly, the device enables adaptive adjustment of the through-hole size on the second roller according to the abrasive size. After one discharge cycle, the operator can drive the second gear to rotate via the second motor on the adjustment assembly. The second gear drives the second rack and the second roller to rotate outside the inner cylinder, changing the angle difference between the second roller and the inner cylinder. This alters the overlapping area of ​​the through-holes on the second roller and the inner cylinder, adapting to abrasives and workpieces of different sizes. When used with smaller workpieces, adjusting the overlapping area of ​​the through-holes prevents the workpiece from falling out. This solves the problem that existing sandblasting machines cannot adaptively adjust the through-hole size according to the abrasive and workpiece size, giving the device a greater advantage in adaptability.

[0020] The device is equipped with a traction component. When the first motor drives the first gear to rotate, the first rack extends outward from the connecting shell. When the middle cylinder disengages from the two adjacent inner cylinders, the connecting rod gradually approaches the top surface of the outer shell, thereby gradually reducing the spring tension between the two adjacent connecting belts. The pressure between the side of the pressure plate and the sliding plate also gradually decreases. After the middle cylinder completely disengages from the two adjacent inner cylinders, the pressure of the pressure plate on the sliding plate is insufficient to allow the push plate to support the sandblasting pipe. This allows the device to automatically tilt and discharge the workpiece after opening the opening on one side of the roller. When the first motor drives the first gear to rotate in the forward direction, the first rack moves into the connecting shell. Following the reverse steps, the pressure of the push plate on the sandblasting pipe gradually increases until the second roller rotates to a horizontal position. At this point, even if the connecting belt further pulls the pressure plate, only the spring is stretched, the pressure plate remains stationary, and the sandblasting pipe cannot be pushed further. The third rollers on both sides of the middle cylinder can then stably dock with the second roller and the inner cylinder. When docking two sets of rollers, the device can automatically keep the second roller horizontal before docking, enhancing the stability of the device during operation and the convenience of docking. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the connecting shell of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection structure between the connecting shell and the movable plate of the present invention;

[0024] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;

[0025] Figure 5 This is a schematic diagram of the internal structure of the third roller of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure between the ball cover and the bushing of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection structure between the movable plate and the first rack of the present invention;

[0028] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B;

[0029] Figure 9 This is a schematic diagram of the connection structure between the second roller and the inner cylinder of the present invention;

[0030] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C;

[0031] Figure 11 This is a schematic diagram of the tilted state of the spherical cover of the present invention;

[0032] Figure 12 This is a schematic diagram showing the separation state of the third connecting cover and the second roller of the present invention;

[0033] Figure 13 This is a schematic diagram of the tilted state of the inner cylinder of the present invention.

[0034] Reference numerals: 1. Outer shell; 2. Collection box; 3. Connecting shell; 4. Opening; 5. Support assembly; 501. Fixing ring; 502. Bushing; 503. Ball cover; 504. Sandblasting pipe; 505. Guide pipe; 6. Sandblasting assembly; 601. Abrasive box; 602. Air pump; 603. Fixing pipe; 604. Connecting pipe; 605. Clamping rod; 7. Traction assembly; 701. Guide rail; 702. Pressure plate; 703. Slide plate; 704. Guide rod; 705. Push plate; 706. Connecting belt; 707. Connecting frame; 708. Spring; 8. Drive assembly; 801. First motor; 802. First gear; 803. First... 804. Rack; 805. Connecting rod; 806. Movable plate; 807. Guide plate; 9. First roller; 10. Second roller; 11. Inner cylinder; 12. Connecting assembly; 1201. Third roller; 1202. Middle cylinder; 1203. Sealing cover; 1204. Protective shell; 1205. Second motor; 1206. Connecting shaft; 1207. Drive wheel; 13. Connecting ring; 14. Adjusting assembly; 1401. Fixing plate; 1402. Second gear; 1403. Second rack; 1404. Connecting cover; 1405. Electromagnetic brake motor; 15. Through hole; 16. Rubber protrusion; 17. Extension bracket; 18. Glove interface. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0037] Example 1:

[0038] like Figures 1-13 As shown, this embodiment proposes a drum-type sandblasting machine, including a housing 1, a connecting shell 3 and a support assembly 5 mounted on the housing 1, a collection box 2 placed below the housing 1, a sandblasting assembly 6 and a traction assembly 7 mounted on the top of the housing 1, a first drum 9 mounted on the support assembly 5, a second drum 10 connected to the first drum 9, an inner cylinder 11 rotatably disposed inside the second drum 10, and an adjustment assembly 14 installed between the second drum 10 and the inner cylinder 11. The adjustment assembly 14 is used to adjust the angle difference between the second drum 10 and the inner cylinder 11, thereby changing the two sets of through holes. The overlapping area is 15 to accommodate workpieces and abrasives of different sizes. The second roller 10 and the inner cylinder 11 are provided with through holes 15 and rubber protrusions 16. A connecting component 12 is provided between two adjacent second rollers 10. A drive component 8 is installed between the connecting component 12 and the traction component 7. The support component 5 is used to support the first roller 9 and the second roller 10. The rubber protrusions 16 can drive the second roller 10 and the inner cylinder 11 to rotate after the connecting component 12 is connected to the second roller 10, thereby turning the workpiece for sandblasting to ensure the sandblasting effect of the device.

[0039] Support assembly 5 includes a fixing ring 501 and a bushing 502 installed on both sides of the outer casing 1. A ball cover 503 is rotatably installed inside the bushing 502. A sandblasting pipe 504 is connected to the ball cover 503. A guide pipe 505 is provided on the outside of the sandblasting pipe 504. Sandblasting assembly 6 includes an abrasive box 601 and an air pump 602 installed on the top of the outer casing 1. The bushing 502 is used to support the ball cover 503. After the connecting assembly 12 is disengaged from the two sets of second rollers 10 and inner cylinders 11, the second rollers 10 and inner cylinders 11 rotate under their own gravity through the ball cover 503. Figure 11 In this state, the remaining abrasive and the finished workpiece in the inner cylinder 11 can fall into the collection box 2. The traction component 7, in conjunction with the drive component 8, enables the device to move from... Figure 11 The state is restored to Figure 3 The state in.

[0040] Example 2:

[0041] The solution in Example 1 will be further described below with reference to its specific working method.

[0042] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, further, openings 4 for the rotation of the first roller 9 are provided on both sides of the outer shell 1. The first roller 9, the second roller 10, and the inner cylinder 11 are symmetrically distributed on both sides of the connecting assembly 12. The workpiece can be sandblasted by the two sets of first roller 9, second roller 10, and inner cylinder 11. A connecting ring 13 is fixedly connected to the first roller 9. The ball cover 503 is rotatably connected to the connecting ring 13, and the ball cover 503 can remain stationary when the first roller 9 and the connecting ring 13 rotate. Four glove ports 18 are provided on the outer shell 1. The glove ports 18 are used to clean the inner wall of the inner cylinder 11. An extension bracket 17 is installed on the bushing 502. Figure 2 As can be seen, the extension bracket 17 can not rotate further after the second roller 10 and the inner cylinder 11 have rotated to a horizontal position, thus preventing the material discharge side of the second roller 10 from tilting upwards.

[0043] like Figures 1-3 As shown, in a preferred embodiment, based on the above method, the spherical cover 503, the sandblasting pipe 504, the guide pipe 505, and the abrasive box 601 are interconnected. The side of the sandblasting pipe 504 near the guide pipe 505 is arc-shaped, as shown... Figure 1As shown, the center of the arc coincides with the center of the sphere of the spherical cover 503. The guide tube 505 is rotatably connected to the abrasive box 601. A fixed tube 603 is installed on the abrasive box 601. A connecting tube 604 is attached to the fixed tube 603. The connecting tube 604 is connected to the guide tube 505. A locking rod 605 is attached to the connecting tube 604 and the fixed tube 603. Pulling the locking rod 605 will remove the locking rod 605 from the connecting tube 604 and the fixed tube 603. Rotating the guide tube 505 will cause the sandblasting pipe 504 to disengage from the inlet position of the sphere of the spherical cover 503, thereby conveying the workpiece into the device for sandblasting.

[0044] like Figures 1-3 and Figure 7 As shown, in a preferred embodiment, based on the above method, the traction assembly 7 further includes a guide rail 701 mounted on the top of the housing 1. A pressure plate 702 is slidably mounted on the outer side of the guide rail 701. Slide plates 703 are respectively abutted on both sides of the pressure plate 702. A guide rod 704 is fixedly connected to the housing 1 and passes through the interior of the slide plate 703. A push plate 705 is mounted on the slide plate 703. A connecting frame 707 is provided above the pressure plate 702. Connecting straps 706 are slidably mounted on both sides of the connecting frame 707. A spring 708 is fixedly provided between two adjacent connecting straps 706. The upper connecting strap 706 is connected to the drive assembly 8. The guide rod 704 ensures that the slide plate 703 and the push plate 705 move horizontally. The push plate 705 facilitates subsequent adjustment of the tilt angle of each roller. When the connecting strap 706 located below the connecting frame 707 cannot be pulled further upward, the spring 708 can continuously pull the connecting strap 706 above the connecting frame 707 to facilitate subsequent docking of each group of rollers.

[0045] like Figure 1 As shown, in a preferred embodiment, based on the above method, the surfaces of the pressure plate 702 and the slide plate 703 that abut against each other are both inclined surfaces. When the pressure plate 702 moves backward, it can abut against the slide plate 703, causing the slide plate 703 to slide to both sides of the device. The position of the push plate 705 corresponds to the position of the sandblasting pipe 504. When the push plate 705 pushes the middle section of the sandblasting pipe 504 to a vertical state, each roller remains horizontal so as to perform sandblasting treatment on the workpiece.

[0046] like Figure 2 and Figures 11-13As shown, in a preferred embodiment, based on the above method, the drive assembly 8 further includes a first motor 801 mounted on the connecting shell 3. A first gear 802 is fixedly mounted on the output shaft of the first motor 801. A first rack 803 is meshed on the first gear 802. The first rack 803 is slidably mounted inside the connecting shell 3. Connecting rods 804 are fixedly mounted on both sides of the first rack 803. The connecting rods 804 are connected to the connecting belt 706 located above the connecting frame 707. A movable plate 805 is connected to the first rack 803. The movable plate 805 is connected to the connecting assembly 12. The first motor 801 drives the first gear 802 to rotate. The first gear 802 pulls the connecting assembly 12 away from the two adjacent sets of rollers. The two adjacent connecting belts 706 gradually move closer together so that the horizontal rollers can be switched to an inclined state, thereby automatically unloading the processed workpiece and remaining abrasive from the device.

[0047] like Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the movable plate 805 is further fitted to the connecting shell 3, and a guide plate 806 is fixedly connected inside the connecting shell 3. The guide plates 806 are symmetrically distributed on both sides of the movable plate 805. The guide plates 806 are used to limit the movable plate 805, so that the movable plate 805 can make circumferential movement, which facilitates the subsequent accurate docking of multiple sets of rollers.

[0048] like Figures 2-7 As shown, in a preferred embodiment, based on the above method, the connecting assembly 12 further includes a sealing cover 1203 fixedly connected to the movable plate 805, a middle cylinder 1202 rotatably mounted on the sealing cover 1203, and third rollers 1201 fixedly arranged on both sides of the middle cylinder 1202. A protective shell 1204 is installed on the sealing cover 1203, and a second motor 1205 is installed inside the protective shell 1204. The sealing cover 1203 and the protective shell 1204 can prevent the abrasive from affecting the normal operation of the second motor 1205. A connecting shaft 1206 is connected to the output shaft of the second motor 1205, and a drive wheel 1207 is installed on the connecting shaft 1206. The second motor 1205 is used to drive the connecting shaft 1206 and the drive wheel 1207 to rotate. The drive wheel 1207 can abut against and drive the middle cylinder 1202 to rotate, so as to drive multiple sets of rollers to rotate synchronously for material turning and sandblasting.

[0049] like Figure 5 As shown, in a preferred embodiment, based on the above method, the drive wheel 1207 is made of rubber, and there is frictional contact between the drive wheel 1207 and the middle cylinder 1202. The sealing cover 1203 is in close contact with the middle cylinder 1202 to prevent abrasive from entering the interior of the sealing cover 1203 and affecting the normal operation of the drive wheel 1207, thus ensuring the overall stability of the device.

[0050] like Figures 7-10 As shown, in a preferred embodiment, based on the above method, the adjustment component 14 further includes a fixing plate 1401 mounted on the inner cylinder 11. A connecting cover 1404 and an electromagnetic brake motor 1405 are mounted on the fixing plate 1401. A second gear 1402 is fixedly connected to the output shaft of the electromagnetic brake motor 1405. A second rack 1403 is meshed on the second gear 1402. The second rack 1403 is connected to the second roller 10. The connecting cover 1404 on the fixing plate 1401 is used to protect the electromagnetic brake motor 1405. The electromagnetic brake motor 1405 is used to drive the second gear 1402 to rotate. The second gear 1402 drives the second rack 1403 and the second roller 10 to rotate, changing the angle difference between the inner cylinder 11 and the second roller 10, so that the device can adapt to the use of abrasives and workpieces of different sizes.

[0051] Example 3:

[0052] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0053] Specifically, when using this drum-type sandblasting machine: (e.g.) Figures 1-3 and Figures 8-10 As shown, the outer shell 1 supports the entire device. First, the staggered area of ​​the two sets of through holes 15 on the second roller 10 and inner cylinder 11 is adjusted according to the workpiece size to ensure the abrasive can pass through normally and the workpiece will not fall out of the through holes 15. The electromagnetic brake motor 1405 on the fixed plate 1401 drives the second gear 1402 to rotate. The second gear 1402 drives the second rack 1403 to rotate with the second roller 10, changing the angle difference between the inner cylinder 11 and the second roller 10, allowing the device to adapt to abrasives and workpieces of different sizes. The workpiece is then fed into the inner cylinder 11. The clamping rod 605 is pulled to remove it from the connecting pipe 604 and the fixed pipe 603. The guide pipe 505 is rotated to disengage the sandblasting pipe 504 from the inlet of the ball cover 503. The workpiece is then fed into the inner cylinder 11 through the inlet outside the ball cover 503. Finally, the connecting pipe 604 and the fixed pipe 603 are restored to their original positions. Figure 1 In the current state, a clamping rod 605 is installed inside the connecting pipe 604 and the fixing pipe 603, so that the sandblasting pipe 504 can stably abut against the ball cover 503. At this time, the air pressure pump 602 is started to transport the abrasive particles in the abrasive box 601 to the inner cylinder 11 through the guide pipe 505 and the sandblasting pipe 504 in sequence. Figure 1 As can be seen, because the lower half of the sandblasting pipe 504 is tilted downwards, it can be aligned with the bottom of the inner cylinder 11 during sandblasting to ensure the sandblasting effect.

[0054] like Figures 3-7As shown, the sealing cover 1203 and the protective shell 1204 are used to prevent abrasive from entering the interior of the protective shell 1204 and affecting the normal operation of the second motor 1205. During sandblasting of the workpiece, the second motor 1205 drives the connecting shaft 1206 and the drive wheel 1207 to rotate. The rubber drive wheel 1207 can abut against and drive the middle cylinder 1202 to rotate on the sealing cover 1203. Figure 2 and Figure 8 As shown, the third roller 1201 can abut against the inner cylinder 11 and the second roller 10 via the rubber protrusion 16, causing the inner cylinder 11 and the second roller 10 to rotate synchronously with the third roller 1201. The first roller 9 rotates on the ball cover 503 via the connecting ring 13, allowing the material to be sandblasted during the tumbling process. After sandblasting, the collection box 2 filled with abrasive is removed and replaced with a new collection box 2 for subsequent collection of processed workpieces. The first motor 801 on the drive assembly 8 drives the first gear 802 to rotate, and the first gear 802 drives the arc-shaped first rack 803 to rotate, as shown. Figure 3 As shown, the guide plate 806 inside the connecting shell 3 is used to guide the movable plate 805. The first rack 803 pulls the sealing cover 1203 through the movable plate 805. The sealing cover 1203 pulls the middle cylinder 1202 and the third roller 1201 to gradually separate from the adjacent two inner cylinders 11. Figure 2 As shown, at this time, the connecting rod 804 gradually approaches the top surface of the outer shell 1, the tension of the spring 708 between the two connecting strips 706 on the upper and lower sides of the connecting frame 707 gradually decreases, and the pressure between the pressure plate 702 and the sliding plate 703 also gradually decreases. When the middle cylinder 1202 is completely separated from the two adjacent inner cylinders 11, the pressure of the pressure plate 702 on the sliding plate 703 is insufficient to allow the push plate 705 to support the sandblasting pipe 504. Under the action of their own gravity, the second roller 10 and the inner cylinder 11 automatically tilt through the ball cover 503. Figures 11-13 As can be seen, the discharge ports of the second roller 10 and the inner cylinder 11 are tilted downwards, and the workpieces that have been sandblasted slide out of the inner cylinder 11.

[0055] like Figure 2As shown, when the first motor 801 drives the first gear 802 to rotate clockwise, the first rack 803 moves into the connecting housing 3. The connecting belt 706 pulls the pressure plate 702, which abuts against the sliding plate 703. Under the guidance of the guide rod 704, the sliding plate 703 pushes the sandblasting pipe 504 through the push plate 705 until the sandblasting pipe 504 abuts against the extension bracket 17. At this time, the second roller 10 rotates to a horizontal position, ensuring that when the connecting belt 706 further pulls the pressure plate 702, only the spring 708 is stretched, and the pressure plate 702 remains stationary. The extension bracket 17 prevents the sandblasting pipe 504 from being pushed further, ensuring that the two adjacent second rollers 10 can remain horizontal and wait for docking before the third roller 1201 moves between them. The extension bracket 17 on the bushing 502 is used to prevent the outlet of the second roller 10 from tilting upwards, and the fixing ring 501 is used to block the opening 4.

[0056] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A drum-type sandblasting machine, comprising a housing, characterized in that, The outer shell is equipped with a connecting shell and a support assembly. A collection box is placed below the outer shell. A sandblasting assembly and a traction assembly are installed on the top of the outer shell. A first roller is installed on the support assembly. A second roller is connected to the first roller. An inner cylinder is rotatably arranged inside the second roller. An adjustment assembly is installed between the second roller and the inner cylinder. Both the second roller and the inner cylinder are provided with through holes and rubber protrusions. A connecting assembly is provided between two adjacent second rollers. A drive assembly is installed between the connecting assembly and the traction assembly. The support assembly includes a fixing ring and a bushing installed on both sides of the outer shell. A ball cover is rotatably installed inside the bushing. A sandblasting pipe is connected to the ball cover. A guide pipe is provided on the outside of the sandblasting pipe. The sandblasting assembly includes an abrasive box and an air pressure pump installed on the top of the outer shell. The traction assembly includes a guide rail mounted on the top of the housing, a pressure plate slidably mounted on the outer side of the guide rail, sliding plates abutting against each other on both sides of the pressure plate, a push plate mounted on the sliding plates, a connecting frame above the pressure plate, and connecting belts slidably mounted on both sides of the connecting frame. A spring is fixedly installed between two adjacent connecting strips, and the upper connecting strip is connected to the drive assembly; The surfaces where the pressure plate and the sliding plate abut against each other are both inclined surfaces, and the position of the push plate corresponds to the position of the sandblasting pipe. The drive assembly includes a first motor mounted on the connecting shell, a first gear fixedly mounted on the output shaft of the first motor, a first rack meshing with the first gear, the first rack slidably mounted inside the connecting shell, connecting rods fixedly mounted on both sides of the first rack, the connecting rods being connected to a connecting belt located above the connecting frame, and a movable plate connected to the first rack, the movable plate being connected to the connecting assembly. The connecting assembly includes a sealing cover fixedly connected to the movable plate, a middle cylinder rotatably mounted on the sealing cover, third rollers fixedly provided on both sides of the middle cylinder, a protective shell mounted on the sealing cover, a second motor installed inside the protective shell, a connecting shaft connected to the output shaft of the second motor, and a drive wheel mounted on the connecting shaft. The third roller can abut against the inner cylinder and the second roller through rubber protrusions, so that the inner cylinder, the second roller and the third roller rotate synchronously.

2. The drum-type sandblasting machine according to claim 1, characterized in that, Both sides of the outer shell have openings for the first roller to rotate. The first roller, the second roller, and the inner cylinder are symmetrically distributed on both sides of the connecting assembly. A connecting ring is fixedly connected to the first roller. The ball cover is rotatably connected to the connecting ring. An extension bracket is installed on the bushing.

3. A drum-type sandblasting machine according to claim 1, characterized in that, The spherical cover, sandblasting pipe, guide pipe and abrasive box are interconnected. The side of the sandblasting pipe near the guide pipe is arc-shaped. The guide pipe and abrasive box are rotatably connected. A fixing pipe is installed on the abrasive box. A connecting pipe is attached to the fixing pipe. The connecting pipe is connected to the guide pipe. A clamp is attached to the inside of the connecting pipe and the fixing pipe.

4. A drum-type sandblasting machine according to claim 1, characterized in that, The movable plate and the connecting shell are fitted together, and a guide plate is fixedly connected inside the connecting shell. The guide plates are symmetrically distributed on both sides of the movable plate.

5. A drum-type sandblasting machine according to claim 1, characterized in that, The drive wheel is made of rubber, and there is frictional contact between the drive wheel and the middle cylinder. The sealing cover is in close contact with the middle cylinder.

6. A drum-type sandblasting machine according to claim 1, characterized in that, The adjustment assembly includes a fixed plate installed on the inner cylinder, a connecting cover and an electromagnetic brake motor installed on the fixed plate, a second gear fixedly connected to the output shaft of the electromagnetic brake motor, a second rack meshing with the second gear, and the second rack connected to the second roller.

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