Low noise pneumatic marking device

Abstract

This invention discloses a low-noise pneumatic marking device, relating to the field of pneumatic marking machine technology. It includes a pneumatic marking machine body and a conveyor belt. Drive rollers and transmission rollers are respectively fitted at both ends of the conveyor belt. The pneumatic marking machine body is fixedly mounted on the upper end of a fixed plate. A plurality of clamping bases are evenly spaced on the conveyor belt. The clamping bases are fixedly connected to the conveyor belt via connecting plates. The upper end of the fixed plate is provided with a noise reduction mechanism to facilitate noise reduction during operation of the marking needle. The upper end of the fixed plate is also provided with a cleaning mechanism to facilitate cleaning the workpiece surface. This invention reduces noise diffusion by setting a first soundproof cover and a second soundproof cover. The air pump output end is connected to the exhaust pipe and the input end of the connecting pipe via a T-shaped connector, facilitating cleaning of the workpiece surface through the exhaust pipe. The connecting pipe allows for heat dissipation of the marking needle.

Description

Technical Field

[0001] This invention relates to the field of pneumatic marking machine technology, specifically a low-noise pneumatic marking device. Background Technology

[0002] A marking machine is a device that uses a marking mechanism to mark and engrave on the surface of an object. Among them, the pneumatic marking machine is the most common type today. It is usually used to print marks of a certain depth on the surface of metal plates, thereby creating a specified mark on the metal plate surface. The strong noise pollution generated when the pneumatic needle marking machine prints marks mainly comes from the shock wave generated when the needle impacts the high-strength workpiece, which produces a large and harsh noise. Moreover, most existing pneumatic marking machines are open-type, which means that the noise can affect the health of the workers when they work for a long time. At the same time, most marking needles will overheat due to continuous up and down output after working for a long time. When the marking needle is too hot, it cannot guarantee that it will not deform after impact with the workpiece when it is overheated and its hardness is reduced. This will cause it to be unable to perform marking work stably, resulting in a decrease in the quality of the produced products and a shortened service life.

[0003] Based on this, a low-noise pneumatic marking device is now available, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0004] The purpose of this invention is to provide a low-noise pneumatic marking device to solve the problem of noise generated by pneumatic marking machines during operation affecting workers and to prevent the marking needle from overheating.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A low-noise pneumatic marking device includes a pneumatic marking machine body and a conveyor belt. Drive rollers and transmission rollers are respectively fitted at both ends of the conveyor belt. The rotating shafts at both ends of the drive rollers and transmission rollers are rotatably mounted in mounting holes on one side of two fixed plates. Support frames are fixed at both ends of the fixed plates. A first drive assembly for driving the conveyor belt to rotate is provided on one side of the fixed plates. The pneumatic marking machine body is fixedly mounted on the upper end of one fixed plate. Several clamping bases are evenly spaced on the conveyor belt. The clamping bases are fixedly connected to the conveyor belt via connecting plates. Auxiliary support plates are symmetrically provided at the bottom of each clamping base. A clamping assembly for clamping workpieces is provided inside each clamping base. A noise reduction mechanism to reduce noise diffusion of the marking needle during operation is provided on the upper end of the fixed plate. A cleaning mechanism for cleaning the workpiece surface is also provided on the upper end of the fixed plate.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative: the first drive assembly includes an electric motor, which is fixedly mounted in a mounting hole on one side of a fixed plate, and the drive wheel on the output end of the electric motor is connected to the driven wheel on one end of the rotating shaft of the drive roller via a first belt.

[0009] In one alternative embodiment: the clamping assembly includes a first threaded rod and a push rod. The first threaded rod is fitted into a threaded hole on one side of the friction wheel. The friction wheel is rotatably mounted in a mounting groove on one side of the clamp base. One end of the push rod is rotatably provided with an adjusting screw block. A third threaded rod is fitted into a threaded hole at one end of the adjusting screw block. A push plate is fixedly provided at one end of both the first and third threaded rods. A fixed support plate is symmetrically provided at one end of the push rod. A spring is fixedly provided between one side of the fixed support plate and one side of the clamp base. A scale is fixedly provided on one side of each push plate. A first friction plate is fixedly provided at the upper end of one fixed plate at a position corresponding to one side of the pneumatic marking machine body. A second friction plate is fixedly provided at the upper end of the fixed plate at a position corresponding to the other side of the pneumatic marking machine body. Both the first and second friction plates are located at the upper end of the fixed plate at positions corresponding to the friction wheel.

[0010] In one alternative embodiment: the noise reduction mechanism includes a first soundproof cover and a second soundproof cover, which are symmetrically arranged. A fixed soundproof cover is slidably provided on the inner side of both the first and second soundproof covers. A first support plate is fixedly provided on one side of both the first and second soundproof covers. A second support plate is fixedly provided on one side of the fixed soundproof cover at a position corresponding to the first support plate. A second threaded rod is fitted into the threaded hole at the upper end of the first support plate. One end of the second threaded rod is rotatably provided in the mounting hole at the upper end of the second support plate. Guide slide rods are symmetrically provided at the bottom end of both fixed soundproof covers. The guide slide rods are slidably provided in the circular through hole on one side of the fixed plate. A second driving component is provided between the two fixed plates to facilitate the movement of the fixed soundproof cover.

[0011] In one alternative embodiment: the second drive assembly includes a first rack fixedly disposed at the bottom end of the fixed soundproof cover, the first rack slidably disposed within a rectangular through hole on one side of the fixed plate, a first gear fitted on each of the two first racks, the first gear being fixedly disposed on a fixed shaft, a plurality of rotating plates rotatably disposed on the fixed shaft, the plurality of rotating plates being fixedly disposed on one side of the fixed plate, a second gear being fixedly disposed on each of the fixed shaft, a second rack fitted on the second gear, the second rack being fixedly disposed on one side of the mounting plate on the output end of the electric push rod, and the electric push rod being fixedly disposed within a mounting hole on one side of the fixed mounting plate between the two fixed plates.

[0012] In one alternative: a guide block is fixedly provided on the inner side of the fixed soundproof cover where the first soundproof cover is located.

[0013] In one alternative embodiment: the cleaning mechanism includes a sliding frame, with fixed guide plates symmetrically slidably mounted on the inner side of the sliding frame. Two fixed guide plates are respectively fixed to the upper ends of two fixed plates. Fixed rods are symmetrically mounted on one side of the sliding frame, with guide groove rods slidably mounted at one end of each fixed rod. Two guide groove rods are respectively fixed to one side of the first soundproof cover and the second soundproof cover. A fixed box is fixedly mounted on the upper inner side of the sliding frame. A cleaning roller is rotatably mounted inside the fixed box. The cleaning roller has several bristles. A linkage component is provided on one side of the sliding frame to facilitate the rotation of the cleaning roller.

[0014] In one alternative embodiment: the linkage assembly includes a first conical friction wheel fixedly mounted on a rotating shaft at one end of the cleaning roller; a second conical friction wheel fitted on the first conical friction wheel; the second conical friction wheel fixedly mounted on one end of a sleeve shaft; an external spline shaft slidably mounted in an inner spline groove at the other end of the sleeve shaft; a third conical friction wheel fixedly mounted on one end of the external spline shaft; a fourth conical friction wheel fitted on the third conical friction wheel; the fourth conical friction wheel fixedly mounted on one end of a transmission shaft; a fifth conical friction wheel fixedly mounted on the other end of the transmission shaft; a sixth conical friction wheel fitted on the fifth conical friction wheel; the sixth conical friction wheel fixedly mounted on the output shaft of a motor; a plurality of first rotating support plates rotatably mounted on the sleeve shaft; all of the plurality of first rotating support plates are fixedly mounted on one side of a sliding frame; a plurality of second rotating support plates rotatably mounted on both the external spline shaft and the transmission shaft; and the plurality of second rotating support plates are fixedly mounted on one side of a fixed plate.

[0015] In one alternative: an air pump is fixedly installed on one side of the sliding frame, and a T-shaped connector is connected to the output end of the air pump. The two output ends of the T-shaped connector are respectively connected to the exhaust pipe and the input end of the connecting pipe. One end of the connecting pipe is tightly attached to one side of the first soundproof cover and the second soundproof cover. The bottom end of the exhaust pipe is provided with several exhaust holes, and the exhaust pipe is fixedly installed on one side of the fixed box.

[0016] In one alternative: a mounting tube is fixedly provided at the upper end of the fixed plate, a mounting shaft is rotatably provided inside the mounting tube, a lever is fixedly provided on the mounting shaft, and a torsion spring is provided at the connection between the mounting tube and the mounting shaft.

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

[0018] 1. This invention, by setting a first soundproof cover and a second soundproof cover on both sides of the pneumatic marking machine body, facilitates the formation of a closed space by combining the first soundproof cover, the second soundproof cover, the fixed soundproof cover, and the pneumatic marking machine body when the marking needle is used to mark the workpiece. This reduces the spread of noise and solves the problem of noise generated by existing pneumatic marking machines during operation, which affects the health of the workers. At the same time, since both the first soundproof cover and the second soundproof cover are slidably connected to the fixed soundproof cover, and the working height of the first soundproof cover and the second soundproof cover is adjusted by the second threaded rod, it is convenient to adjust the working height of the first soundproof cover and the second soundproof cover according to the different working heights of the pneumatic marking machine body.

[0019] 2. This invention facilitates the cleaning of the workpiece surface by incorporating a cleaning roller, thereby enabling the marking needle to mark the workpiece. Simultaneously, an air pump is installed on one side of the sliding frame, with its output end connected to an exhaust pipe and a connecting pipe input end via a T-connector. This allows for cleaning of the workpiece surface via the exhaust pipe, while the connecting pipe provides heat dissipation for the marking needle, preventing overheating during prolonged operation. When the first and second soundproof covers are closed, one end of the connecting pipe is sealed, reducing gas waste. Furthermore, the cooperation between the fixing rod and the guide groove rod allows the sliding frame to move along with the first and second soundproof covers when their working height is adjusted, thus increasing the practicality of the pneumatic marking device.

[0020] 3. This invention, by setting several clamping bases on the conveyor belt, facilitates quick switching of the clamping bases under the pneumatic marking machine body, allowing loading, processing, and unloading to be performed simultaneously, thereby accelerating production efficiency. The friction wheel's frictional engagement with the upper end of the first friction plate facilitates automatic clamping of the workpiece, while the friction wheel's frictional engagement with the bottom end of the second friction plate facilitates automatic release of the workpiece after processing, making it easy for workers to remove the workpiece. Simultaneously, by setting a guide block inside a fixed soundproof cover, the push rod pushes the push plate to clamp and fix the workpiece between marking actions. The clamping and fixing of the workpiece by the two push plates prevents displacement of the workpiece during marking action processing. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the motor installation of the present invention.

[0023] Figure 3 This is a schematic diagram of the dial structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the cleaning roller structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the installation of the electric actuator of the present invention.

[0026] Figure 6 This is a schematic diagram of the sleeve structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the guide block structure of the present invention.

[0028] Figure 8 This is a schematic diagram of the exhaust pipe installation of the present invention.

[0029] Figure 9 This is a schematic diagram of the top rod structure of the present invention.

[0030] Figure reference numerals: 11 Pneumatic marking machine body, 12 Marking needle, 13 Clamp base, 14 Connecting plate, 15 Auxiliary support plate, 16 First threaded rod, 17 Friction wheel, 18 Top rod, 19 Adjusting screw block, 20 Spring, 21 Conveyor belt, 22 Fixed plate, 23 Support frame, 24 Motor, 25 Paddle plate, 26 First friction plate, 27 Sliding frame, 28 Fixed guide plate, 29 Cleaning roller, 30 Exhaust pipe, 31 Air pump, 32 Connecting pipe, 33 Drive shaft, 34 Sleeve shaft, 35 First soundproof cover, 36 Second soundproof cover, 37 Fixed soundproof cover, 38 Second threaded rod, 39 Guide wedge block, 40 First rack, 41 First gear, 42 Guide slide rod, 43 Second rack, 44 Second gear, 45 Electric push rod, 46 Fixed rod, 47 Guide groove rod, 48 Second friction plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] In one embodiment, such as Figures 1-9As shown, the low-noise pneumatic marking device includes a pneumatic marking machine body 11 and a conveyor belt 21. Drive rollers and transmission rollers are respectively fitted at both ends of the conveyor belt 21. The rotating shafts at both ends of the drive rollers and transmission rollers are rotatably mounted in mounting holes on one side of two fixed plates 22. Support frames 23 are fixedly mounted at both ends of the fixed plates 22. A first drive assembly is provided on one side of the fixed plates 22 to facilitate the rotation of the conveyor belt 21. The pneumatic marking machine body 11 is fixedly mounted on the upper end of one fixed plate 22. A plurality of clamp bases are evenly spaced on the conveyor belt 21. The fixture base 13 is fixedly connected to the conveyor belt 21 via a connecting plate 14. The bottom end of the fixture base 13 is symmetrically provided with auxiliary support plates 15. The fixture base 13 is provided with a clamping assembly for facilitating the clamping of workpieces. The upper end of the fixing plate 22 is provided with a noise reduction mechanism to reduce the noise diffusion of the marking needle 12 during operation. The upper end of the fixing plate 22 is provided with a cleaning mechanism to facilitate the cleaning of the workpiece surface. The noise reduction mechanism facilitates the reduction of noise diffusion generated by the marking needle 12 during operation, and the cleaning mechanism facilitates the cleaning of the workpiece surface.

[0034] The first drive assembly includes a motor 24, which is fixedly installed in a mounting hole on one side of a fixed plate 22. The drive wheel on the output end of the motor 24 is connected to the driven wheel on the rotating shaft of one end of the drive roller via a first belt. In use, when it is necessary to switch the clamp base 13 below the pneumatic marking machine body 11, the motor 24 is started. The output end of the motor 24 drives the drive wheel to rotate, and the drive wheel drives the drive roller to rotate via the first belt. The drive roller and the transmission roller cooperate to make the transmission belt 21 rotate, thereby switching the clamp base 13 below the pneumatic marking machine body 11.

[0035] The clamping assembly includes a first threaded rod 16 and a push rod 18. The first threaded rod 16 is fitted into a threaded hole on one side of a friction wheel 17. The friction wheel 17 is rotatably mounted in a mounting groove on one side of a clamping base 13. One end of the push rod 18 is rotatably provided with an adjusting screw block 19. A third threaded rod is fitted into a threaded hole at one end of the adjusting screw block 19. Push plates are fixedly provided at one end of both the first threaded rod 16 and the third threaded rod. Fixed support plates are symmetrically provided at one end of the push rod 18. Springs 20 are fixedly provided between one side of the fixed support plate and one side of the clamping base 13. A scale is fixedly provided on one side of each push plate. A first friction plate 26 is fixedly provided at the upper end of a fixed plate 22 at a position corresponding to one side of the pneumatic marking machine body 11. A second friction plate 48 is fixedly provided at the upper end of the fixed plate 22 at a position corresponding to the other side of the pneumatic marking machine body 11. The first friction plate 26 and the second friction plate 48 are both provided on the fixed plate 18. At the position corresponding to the friction wheel 17 at the upper end of the fixed plate 22, when marking a workpiece is required, the operator places the workpiece inside the fixture base 13 at the corresponding position of one end of the conveyor belt 21. Subsequently, the conveyor belt 21 switches the fixture base 13 below the pneumatic marking machine body 11 one by one. When the fixture base 13 passes the first friction plate 26, the friction wheel 17 rubs against the upper end of the first friction plate 26, causing the friction wheel 17 to rotate. Under the action of the thread, the first threaded rod 16 pushes the push plate to clamp the workpiece. After the workpiece is marked, when the fixture base 13 passes the position of the second friction plate 48, the friction wheel 17 rubs against the bottom end of the second friction plate 48, causing the friction wheel 17 to rotate. Under the action of the thread, the first threaded rod 16 drives the push plate away from the workpiece, thereby releasing the fixation of the workpiece. At the same time, a scale is set on one side of the push plate, which can adjust the initial position of the push plate according to different workpieces.

[0036] The noise reduction mechanism includes a first soundproof cover 35 and a second soundproof cover 36, which are symmetrically arranged. A fixed soundproof cover 37 is slidably provided on the inner side of both the first and second soundproof covers 35 and 36. A first support plate is fixedly provided on one side of both the first and second soundproof covers 35 and 36. A second support plate is fixedly provided on one side of the fixed soundproof cover 37 at a position corresponding to the first support plate. A second threaded rod 38 is fitted into the threaded hole at the upper end of the first support plate, with one end of the second threaded rod 38 rotatably disposed in the mounting hole at the upper end of the second support plate. Guide slide rods 42 are symmetrically provided at the bottom of each fixed soundproof cover 37, and the guide slide rods 42 are slidably disposed in a circular through hole on one side of the fixed plate 22. A second driving assembly is provided between the two fixed plates 22 to facilitate the movement of the fixed soundproof cover 37. In use, the second driving assembly drives the fixed soundproof cover 37 to move, and the two fixed soundproof covers 37 respectively drive the first soundproof cover 35 and the second soundproof cover 36 to move, thereby reducing noise diffusion when the marking needle 12 is working.

[0037] The second drive assembly includes a first rack 40 fixedly mounted on the bottom of the fixed soundproof cover 37. The first rack 40 is slidably disposed within a rectangular through hole on one side of the fixed plate 22. A first gear 41 is fitted onto each of the two first racks 40. The first gear 41 is fixedly mounted on a fixed shaft. A plurality of rotating plates are rotatably mounted on the fixed shaft. All rotating plates are fixedly mounted on one side of the fixed plate 22. A second gear 44 is fixedly mounted on each of the fixed shaft. A second rack 43 is fitted onto each second gear 44. The second rack 43 is fixedly mounted on one side of the mounting plate on the output end of the electric push rod 45. The electric push rod 45 is fixedly disposed within a mounting hole on one side of the mounting plate between the two fixed plates 22. In use, before the marking needle 12 needs to process the workpiece, the drive assembly is activated. The electric push rod 45 drives two second racks 43 to move. The second racks 43 mesh with the second gear 44, causing the second gear 44 to drive the fixed shaft to rotate. The fixed shaft drives the first gear 41 to rotate. The first gear 41 meshes with the first rack 40, causing the first rack 40 to slide in the rectangular through hole on one side of the fixed plate 22. At the same time, the first rack 40 drives the fixed soundproof cover 37 to move. The two fixed soundproof covers 37 drive the first soundproof cover 35 and the second soundproof cover 36 to move respectively. When the first soundproof cover 35 and the second soundproof cover 36 are in close contact, a closed space is formed at the processing position of the marking needle 12. Then the marking needle 12 marks the workpiece. Under the action of the first soundproof cover 35, the second soundproof cover 36 and the fixed soundproof cover 37, the diffusion of noise can be reduced.

[0038] The first soundproof cover 35 is fixedly provided with a guide block 39 inside the fixed soundproof cover 37. When in use, when the two fixed soundproof covers 37 are close together, the fixed soundproof cover 37 drives the guide block 39 to move. One end of the push rod 18 on the clamp base 13 below the pneumatic marking machine body 11 contacts the inclined surface of the guide block 39. When the guide block 39 moves, it pushes the push rod 18 to move, thereby clamping the workpiece. When the two fixed soundproof covers 37 are opened, the push rod 18 returns to the initial position under the action of the spring 20.

[0039] The cleaning mechanism includes a sliding frame 27. Two fixed guide plates 28 are symmetrically slidably mounted on the inner side of the sliding frame 27. The two fixed guide plates 28 are respectively fixed to the upper ends of two fixed plates 22. Fixed rods 46 are symmetrically mounted on one side of the sliding frame 27. Each fixed rod 46 has a guide groove rod 47 slidably mounted at one end. The two guide groove rods 47 are respectively fixed to one side of the first soundproof cover 35 and the second soundproof cover 36. A fixed box is fixedly mounted on the upper inner side of the sliding frame 27. A cleaning roller 29 is rotatably mounted inside the fixed box. The cleaning roller 29 has several bristles. A linkage component is provided on one side of the sliding frame 27 to facilitate the rotation of the cleaning roller 29. During use, the linkage... The component drives the cleaning roller 29 to rotate. When the conveyor belt 21 carries the fixture base 13 containing the workpiece past the bottom of the cleaning roller 29, the cleaning roller 29 rotates and cleans the surface of the workpiece with several bristles. At the same time, through the cooperation of the fixed rod 46 and the guide groove rod 47, when the pneumatic marking machine body 11 adjusts the working height of the marking needle 12, the first soundproof cover 35 and the second soundproof cover 36 adjust their working heights by rotating the second threaded rod 38. When the first soundproof cover 35 and the second soundproof cover 36 are adjusted, the guide groove rod 47 drives the sliding frame 27 to move together through the fixed rod 46, thereby adjusting the working height of the cleaning roller 29.

[0040] The linkage assembly includes a first conical friction wheel fixedly mounted on a rotating shaft at one end of the cleaning roller 29. A second conical friction wheel is fitted onto the first conical friction wheel. The second conical friction wheel is fixedly mounted on one end of a sleeve shaft 34. An external spline shaft is slidably mounted in a spline groove at the other end of the sleeve shaft 34. A third conical friction wheel is fixedly mounted on one end of the external spline shaft. A fourth conical friction wheel is fitted onto the third conical friction wheel. The fourth conical friction wheel is fixedly mounted on one end of a transmission shaft 33. A fifth conical friction wheel is fixedly mounted on the other end of the transmission shaft 33. A sixth conical friction wheel is fitted onto the fifth conical friction wheel. A six-conical friction wheel is fixedly mounted on the output shaft of the motor 24. Several first rotating support plates are rotatably mounted on the sleeve shaft 34. The several first rotating support plates are all fixedly mounted on one side of the sliding frame 27. Several second rotating support plates are rotatably mounted on both the external spline shaft and the transmission shaft 33. The several second rotating support plates are fixedly mounted on one side of the fixed plate 22. In use, when the output end of the motor 24 rotates, the output end of the motor 24 drives the transmission shaft 33 to rotate through the sixth conical friction wheel. The transmission shaft 33 drives the sleeve shaft 34 to rotate through the fourth conical friction wheel. The sleeve shaft 34 drives the cleaning roller 29 to rotate through the second conical friction wheel.

[0041] An installation tube is fixedly provided on the upper end of the fixed plate 22. An installation shaft is rotatably provided inside the installation tube. A dial plate 25 is fixedly provided on the installation shaft. A torsion spring is provided at the connection between the installation tube and the installation shaft. In use, when the conveyor belt 21 drives the fixture base 13 to pass the position corresponding to the dial plate 25, one side of the dial plate 25 pushes the push rod 18 to move, thereby correcting the position of the workpiece.

[0042] Example 2

[0043] The difference from Embodiment 1 is that: an air pump 31 is fixedly installed on one side of the sliding frame 27, and a T-shaped connector is connected to the output end of the air pump 31. The two output ends of the T-shaped connector are respectively connected to the exhaust pipe 30 and the input end of the connecting pipe 32. One end of the connecting pipe 32 is tightly attached to one side of the first soundproof cover 35 and the second soundproof cover 36. The bottom end of the exhaust pipe 30 is provided with several exhaust holes. The exhaust pipe 30 is fixedly installed on one side of the fixed box. In use, when it is necessary to clean the surface of the workpiece and dissipate heat from the marking needle 12, the air pump is started. Pump 31, the output end of which delivers gas to the exhaust pipe 30 and the connecting pipe 32 through a T-shaped connector, and the exhaust pipe 30 discharges the gas through several exhaust holes, thereby cleaning the surface of the workpiece. At the same time, when the first soundproof cover 35 and the second soundproof cover 36 are opened, one end of the connecting pipe 32 is opened, thereby dissipating heat from the marking needle 12. When the first soundproof cover 35 and the second soundproof cover 36 are closed, one end of the connecting pipe 32 is closed because it is in close contact with one side of the first soundproof cover 35 and the second soundproof cover 36.

[0044] The above embodiments disclose a low-noise pneumatic marking device. When marking a workpiece is required, the operator places the workpiece inside the fixture base 13 at the corresponding position of one end of the conveyor belt 21. Then, the motor 24 is started. The output of the motor 24 drives the drive wheel to rotate. The drive wheel drives the drive roller to rotate through the first belt. The drive roller and the transmission roller cooperate to make the conveyor belt 21 rotate, moving the fixture base 13 to one side of the dial plate 25. The dial plate 25 pushes the push rod 18 to move, so that one side of the workpiece is in close contact with one side of the inside of the fixture base 13, thereby calibrating the position of the workpiece. After switching the fixture base 13 under the pneumatic marking machine body 11 to one side, the motor 24 stops. After the marking needle 12 finishes processing the workpiece, the motor 24 drives the conveyor belt 21 again. When the conveyor belt 21 rotates, it drives the fixture base 13 to move to the position corresponding to the first friction plate 26. The friction wheel 17 engages with the upper end of the first friction plate 26, causing the friction wheel 17 to rotate. Under the action of the thread, the first threaded rod 16 pushes the push plate to clamp the workpiece. The fixture base 13 stops moving when it reaches below the exhaust pipe 30. At this time, the output end of the air pump 31 delivers gas to the exhaust pipe 30 and the connecting pipe 32 through a T-joint. The exhaust pipe 30 discharges the gas through several exhaust holes, thus cleaning the surface of the workpiece. When the fixture base 13 moves again, it passes under the cleaning roller 29. The cleaning roller 29 rotates and cleans the surface of the workpiece through several bristles. The fixture base 13 moves to the position below the marking needle 12. When the movement stops, the electric push rod 45 is activated. The output end of the electric push rod 45 drives the two second racks 43 to move. The second racks 43 mesh with the second gear 44, causing the second gear 44 to drive the fixed shaft to rotate. The fixed shaft drives the first gear 41 to rotate, and the first gear 41 meshes with the first rack 40, causing the first rack 40 to slide in the rectangular through hole on one side of the fixed plate 22. At the same time, the first rack 40 drives the fixed soundproof cover 37 to move. The two fixed soundproof covers 37 drive the first soundproof cover 35 and the second soundproof cover 36 to move respectively. When the first soundproof cover 35 and the second soundproof cover 36 are in close contact on one side, a closed space is formed at the processing position of the marking needle 12. At the same time, the fixed soundproof cover 37 drives the guide inclined block 39 to move, which is located below the body 11 of the pneumatic marking machine. One end of the push rod 18 on the base 13 contacts the inclined surface of the guide block 39. When the guide block 39 moves, it pushes the push rod 18 to move, thereby clamping the workpiece. When the first soundproof cover 35 and the second soundproof cover 36 are closed, one end of the connecting pipe 32 is tightly attached to one side of the first soundproof cover 35 and the second soundproof cover 36, thus sealing one end of the connecting pipe 32. Then, the marking needle 12 marks the workpiece. Under the action of the first soundproof cover 35, the second soundproof cover 36, and the fixed soundproof cover 37, the diffusion of noise can be reduced. After marking is completed, the electric push rod 45 drives the first soundproof cover 35 and the second soundproof cover 36 back to the initial position. At the same time, under the action of the spring 20, the push rod 18 returns to the initial position. Simultaneously, when the first soundproof cover 35 and the second soundproof cover 36 open...One end of the connecting pipe 32 is opened to dissipate heat from the marking needle 12. After marking, the workpiece moves with the fixture base 13. When the fixture base 13 moves to the position corresponding to the second friction plate 48, the friction wheel 17 engages with the bottom end of the second threaded rod 38. Under the action of the thread, the first threaded rod 16 is driven back to its initial position. At this point, both drives disengage from the workpiece. When the workpiece moves to the other end of the conveyor belt 21, the operator can quickly remove it. The conveyor belt 21 can be a chain conveyor belt or other types of conveyor belts, which can be selected according to actual use.

[0045] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A low-noise pneumatic marking device, comprising a pneumatic marking machine body (11) and a conveyor belt (21), wherein a drive roller and a transmission roller are respectively provided at both ends of the conveyor belt (21), and the rotating shafts at both ends of the drive roller and the transmission roller are respectively rotatably disposed in mounting holes on one side of two fixed plates (22), and support frames (23) are fixedly provided at both ends of the fixed plates (22), and a first drive assembly is provided on one side of the fixed plates (22) to facilitate the rotation of the conveyor belt (21), wherein the pneumatic marking machine body (11) is fixedly disposed on the upper end of a fixed plate (22), characterized in that, The conveyor belt (21) is provided with several clamp bases (13) at equal intervals. The clamp bases (13) are fixedly connected to the conveyor belt (21) through connecting plates (14). The bottom of each clamp base (13) is symmetrically provided with auxiliary support plates (15). The clamp base (13) is provided with clamping components to facilitate clamping of workpieces. The upper end of the fixing plate (22) is provided with a noise reduction mechanism to reduce the noise diffusion of the marking needle (12) during operation. The upper end of the fixing plate (22) is provided with a cleaning mechanism to facilitate cleaning of the workpiece surface. The noise reduction mechanism includes a first soundproof cover (35) and a second soundproof cover (36). The first soundproof cover (35) and the second soundproof cover (36) are symmetrically arranged. A fixed soundproof cover (37) is slidably provided on the inner side of both the first soundproof cover (35) and the second soundproof cover (36). A first support plate is fixedly provided on one side of both the first soundproof cover (35) and the second soundproof cover (36). A second support plate is fixedly provided on one side of the fixed soundproof cover (37) at a position corresponding to the position of the first support plate. A second threaded rod (38) is fitted into the threaded hole at the upper end of the first support plate. One end of the second threaded rod (38) is rotatably provided in the mounting hole at the upper end of the second support plate. A guide slide rod (42) is symmetrically provided at the bottom end of both fixed soundproof covers (37). The guide slide rod (42) is slidably provided in the circular through hole on one side of the fixed plate (22). A second driving component is provided between the two fixed plates (22) to facilitate the movement of the fixed soundproof cover (37). The cleaning mechanism includes a sliding frame (27), with fixed guide plates (28) symmetrically slidably mounted on the inner side of the sliding frame (27). The two fixed guide plates (28) are respectively fixed on the upper ends of the two fixed plates (22). Fixed rods (46) are symmetrically mounted on one side of the sliding frame (27). One end of each fixed rod (46) is slidably mounted with a guide groove rod (47). The two guide groove rods (47) are respectively fixed on one side of the first soundproof cover (35) and the second soundproof cover (36). A fixed box is fixedly mounted on the upper inner side of the sliding frame (27). A cleaning roller (29) is rotatably mounted inside the fixed box. The cleaning roller (29) is provided with several bristles. A linkage component is provided on one side of the sliding frame (27) to facilitate the rotation of the cleaning roller (29). An air pump (31) is fixedly installed on one side of the sliding frame (27). A T-shaped connector is connected to the output end of the air pump (31). The two output ends of the T-shaped connector are connected to the input ends of the exhaust pipe (30) and the connecting pipe (32), respectively. One end of the connecting pipe (32) is tightly attached to one side of the first soundproof cover (35) and the second soundproof cover (36). The bottom end of the exhaust pipe (30) is provided with several exhaust holes. The exhaust pipe (30) is fixedly installed on one side of the fixed box.

2. The low-noise pneumatic marking device according to claim 1, characterized in that, The first drive assembly includes a motor (24), which is fixedly installed in a mounting hole on one side of a fixed plate (22). The drive wheel on the output end of the motor (24) is connected to the driven wheel on one end of the drive roller via a first belt.

3. The low-noise pneumatic marking device according to claim 1, characterized in that, The clamping assembly includes a first threaded rod (16) and a push rod (18). The first threaded rod (16) is fitted into a threaded hole on one side of a friction wheel (17). The friction wheel (17) is rotatably mounted in a mounting groove on one side of a clamp base (13). One end of the push rod (18) is rotatably provided with an adjusting screw block (19). A third threaded rod is fitted into a threaded hole at one end of the adjusting screw block (19). A push plate is fixedly provided at one end of both the first threaded rod (16) and the third threaded rod. A fixed support plate is symmetrically provided at one end of the push rod (18). A spring (20) is fixed between one side of the support plate and one side of the clamp base (13). A scale is fixed on one side of the push plate. A first friction plate (26) is fixed at the upper end of one of the fixed plates (22) at the position corresponding to one side of the pneumatic marking machine body (11). A second friction plate (48) is fixed at the upper end of the fixed plate (22) at the position corresponding to the other side of the pneumatic marking machine body (11). The first friction plate (26) and the second friction plate (48) are both located at the upper end of the fixed plate (22) at the position corresponding to the friction wheel (17).

4. The low-noise pneumatic marking device according to claim 1, characterized in that, The second drive assembly includes a first rack (40) fixedly disposed at the bottom of the fixed soundproof cover (37). The first rack (40) is slidably disposed in a rectangular through hole on one side of the fixed plate (22). A first gear (41) is fitted on each of the two first racks (40). The first gear (41) is fixedly disposed on a fixed shaft. A plurality of rotating plates are rotatably disposed on the fixed shaft. The plurality of rotating plates are fixedly disposed on one side of the fixed plate (22). A second gear (44) is fixedly disposed on the fixed shaft. A second rack (43) is fitted on the second gear (44). The second rack (43) is fixedly disposed on one side of the mounting plate on the output end of the electric push rod (45). The electric push rod (45) is fixedly disposed in a mounting hole on one side of the fixed mounting plate between the two fixed plates (22).

5. The low-noise pneumatic marking device according to claim 1, characterized in that, A guide block (39) is fixedly provided inside the fixed soundproof cover (37) where the first soundproof cover (35) is located.

6. The low-noise pneumatic marking device according to claim 1, characterized in that, The linkage assembly includes a first conical friction wheel fixedly mounted on a rotating shaft at one end of the cleaning roller (29), a second conical friction wheel fitted on the first conical friction wheel, the second conical friction wheel fixedly mounted on one end of a sleeve shaft (34), an external spline shaft slidingly mounted in a spline groove at the other end of the sleeve shaft (34), a third conical friction wheel fixedly mounted on one end of the external spline shaft, a fourth conical friction wheel fitted on the third conical friction wheel, and the fourth conical friction wheel fixedly mounted on one end of a drive shaft (33). (33) A fifth conical friction wheel is fixedly provided on the other end, and a sixth conical friction wheel is provided on the fifth conical friction wheel. The sixth conical friction wheel is fixed on the output shaft of the motor (24). Several first rotating support plates are rotatably provided on the sleeve shaft (34). Several first rotating support plates are fixed on one side of the sliding frame (27). Several second rotating support plates are rotatably provided on the external spline shaft and the transmission shaft (33). Several second rotating support plates are fixed on one side of the fixed plate (22).

7. The low-noise pneumatic marking device according to claim 1, characterized in that, An installation tube is fixedly provided on the upper end of the fixed plate (22), and an installation shaft is rotatably provided inside the installation tube. A lever plate (25) is fixedly provided on the installation shaft, and a torsion spring is provided at the connection between the installation tube and the installation shaft.

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