Portable screen printing device for annular rotary body component

Abstract

The utility model discloses a portable screen printing device for an annular rotary body part. The portable screen printing device comprises a base, a pneumatic control assembly, a part fixing assembly, a screen plate sliding assembly and a printing assembly. The pneumatic control assembly, the screen plate sliding assembly and the printing assembly are arranged on the base. The component fixing assembly is mounted on the pneumatic control assembly, and a brush head part of the printing assembly is suspended above the screen plate sliding assembly; the annular rotary body part is mounted on the part fixing assembly, and the pneumatic control assembly controls the part fixing assembly to move up and down; the component fixing assembly is in meshing transmission connection with the screen plate sliding assembly after ascending, the screen plate sliding assembly drives the annular rotary body component to rotate synchronously when sliding horizontally, and a brush head part of the printing assembly conducts silk-screen printing on the arc face of the annular rotary body component when the annular rotary body component rotates. A meshing transmission mode is adopted to replace an existing servo motor driving mode, and the meshing transmission mode is simpler in structure, lower in cost and easy to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field especially relates to a portable silk screen printing device for annular rotary body part. BACKGROUND

[0002] At present, there are various integrated automatic and semi-automatic silk screen printing equipment on the market, and most of them are special equipment developed for flat plate silk screen printing. For rotary body parts, such as the rotating button (or annular knob) shown in the figure, it is necessary to use special silk screen printing equipment and process to ensure the printing effect when printing arrows (indicating the rotation direction) and corresponding increase and decrease symbols (indicating the increase and decrease operations) on the arc surface. These special silk screen printing equipment usually uses a servo motor to drive the rotary body part, which has a high cost and requires professional personnel to write control programs to realize the synchronous motion control of the silk screen printing plate sliding speed and the rotating servo motor. For small batch rotary body parts, the cost of function design, debugging and equipment is greatly increased. Figure 1 Thus, the prior art still needs to be improved and improved.

[0003] UTILITY MODEL CONTENT UTILITY MODEL CONTENT

[0004] In view of the shortcomings of the prior art, the utility model aims to provide a portable silk screen printing device for annular rotary body parts to solve the problem of increased silk screen printing cost of rotary body parts by the existing servo motor driving method.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A portable silk screen printing device for annular rotary body parts is used for silk screen printing on the arc surface of the annular rotary body part, which comprises a base, a pneumatic control assembly, a part fixing assembly, a screen plate sliding assembly and a printing assembly. The pneumatic control assembly, the screen plate sliding assembly and the printing assembly are arranged on the base. The part fixing assembly is installed on the pneumatic control assembly, and the brush head of the printing assembly is suspended above the screen plate sliding assembly.

[0007] The annular rotary body part is installed on the part fixing assembly, and the pneumatic control assembly controls the up and down movement of the part fixing assembly. The part fixing assembly is in gear transmission connection with the screen plate sliding assembly after rising, and the screen plate sliding assembly drives the annular rotary body part to rotate synchronously when sliding horizontally. The brush head of the printing assembly performs silk screen printing on the arc surface of the annular rotary body part when the annular rotary body part rotates.

[0008] The portable silk screen printing device for annular rotary body parts, wherein the pneumatic control assembly comprises a pneumatic cylinder, a manual air valve, a first air pipe and a second air pipe.

[0009] The cylinder is fixed on the base, the manual air valve is fixed on a corner of the base, the air inlet of the manual air valve is connected with the air inlet pipe, the air outlet of the manual air valve is connected with the air inlet of the cylinder through the first air pipe, the other air outlet of the manual air valve is connected with the air outlet of the cylinder through the second air pipe, and the telescopic rod of the cylinder is provided with the component fixing assembly.

[0010] The portable silk screen printing device for the annular rotary body component further comprises two speed regulating air valves, one of which is installed between the first air pipe and the air inlet of the cylinder, and the other of which is installed between the second air pipe and the air outlet of the cylinder.

[0011] The component fixing assembly comprises a rotating fixing rod, a bearing support and a bearing.

[0012] The bearing is installed in the horizontal through hole of the bearing support, one end of the rotating fixing rod is provided with the annular knob, the other end of the rotating fixing rod passes through the inner hole of the bearing and extends out of the bearing support, the other end of the rotating fixing rod is in gear transmission connection with the screen plate sliding assembly, and the bearing support is installed on the telescopic rod of the cylinder.

[0013] The screen plate sliding assembly comprises four slide rail foot supports, two slide rail fixing frames, two slide rails, a screen plate bracket and a silk screen plate.

[0014] The two slide rail foot supports are fixed side by side on the two sides of the base, the two ends of the slide rail fixing frame are respectively installed at the top ends of the two slide rail foot supports, the two slide rails are respectively installed on the two slide rail fixing frames, two sliding blocks are installed on each slide rail, the screen plate bracket is fixed on the four sliding blocks in a screwing mode, and the silk screen plate is clamped in the hollow clamping groove on one side of the screen plate bracket; a belt rack is fixed below the clamping groove, a gear on the belt rack is in meshing connection with a gear on the other end of the rotating fixing rod, and when the screen plate bracket moves, the belt rack drives the rotating fixing rod to rotate synchronously.

[0015] The screen plate sliding assembly further comprises two limiting stop blocks, which are respectively clamped on the two sides of a slide rail and are fixed on the slide rail fixing frame below the slide rail in a screwing mode.

[0016] The screen plate sliding assembly further comprises a screen plate side baffle and a handle, the screen plate side baffle is installed on the outer side of the screen plate bracket, and the handle is installed on the outer side of the screen plate side baffle.

[0017] The portable silk printing device for the annular rotary body component, the printing assembly comprises a ground foot support, a cantilever support, a fixed support and a silk printing head, the lower end of the ground foot support is fixed on one side of the base, one side of the upper end of the ground foot support is screw-fixed with one end of the cantilever support, the other end of the cantilever support is installed with the fixed support, and the fixed support is installed with the silk printing head below.

[0018] The portable silk printing device for the annular rotary body component, two rotating fixed rods are arranged, two parallel transverse through holes are arranged on the bearing support, two bearings are installed in each transverse through hole, and the rotating fixed rods pass through the inner holes of the bearings and rotate synchronously with the bearings.

[0019] The portable silk printing device for the annular rotary body component, a waist-shaped hole is arranged on the upper portion of the fixed support, and a screw is screwed into the waist-shaped hole to fix the fixed support on the end face of the other end of the cantilever support.

[0020] Compared with the prior art, the portable silk printing device for the annular rotary body component is used for silk printing on the curved surface of the annular rotary body component, comprises a base, a pneumatic control assembly, a component fixing assembly, a screen plate sliding assembly and a printing assembly, the pneumatic control assembly, the screen plate sliding assembly and the printing assembly are arranged on the base, the component fixing assembly is installed on the pneumatic control assembly, and the brush head of the printing assembly is suspended above the screen plate sliding assembly; the annular rotary body component is installed on the component fixing assembly, the pneumatic control assembly controls the annular rotary body component to move up and down, the component fixing assembly is in gear transmission connection with the screen plate sliding assembly after being lifted, the screen plate sliding assembly drives the annular rotary body component to rotate synchronously when sliding horizontally, and the brush head of the printing assembly performs silk printing on the curved surface of the annular rotary body component when the annular rotary body component rotates. The gear transmission mode is adopted instead of the existing servo motor drive, the structure of the gear transmission mode is simpler, the cost is lower, and the gear transmission mode is easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a silk printing position schematic view of the existing rotary body component.

[0022] Figure 2 It is a structure schematic view of the portable silk printing device for the annular rotary body component.

[0023] Figure 3 It is an explosion view of the structure of the portable silk printing device for the annular rotary body component.

[0024] Figure 4 It is a structure schematic view of the gear transmission connection between the component fixing assembly and the screen plate sliding assembly.

[0025] Figure 5 The four-view diagram of the portable silk-screen printing device for the annular rotary body component is provided.

[0026] Figure 6 The schematic diagram of the ink smearing area of the portable silk-screen printing device is provided.

[0027] Figure 7 The structural schematic diagram of the right movement of the screen board bracket is provided. DETAILED DESCRIPTION

[0028] The utility model provides a kind of portable silk-screen printing device for annular rotary body component. To make the purpose, technical scheme and effect of the utility model more clear, definite, the following with reference to drawing and example is further detailed to the utility model. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0029] Please refer to Figures 2 to 7 The utility model embodiment provides a kind of portable silk-screen printing device for annular rotary body component. The annular rotary body component is Figure 1 As shown in the figure, it is rotatable cylindrical part, such as rotary button, annular knob etc., applied to electronic product. Portable silk-screen printing device is used to print symbol mark on the arc surface of annular rotary body component. The portable silk-screen printing device includes base 1, pneumatic control assembly, component fixed assembly, screen board sliding assembly and printing assembly;The pneumatic control assembly, screen board sliding assembly and printing assembly are arranged on base 1 (is the main body bearing base of each component);Component fixed assembly is installed on pneumatic control assembly, and the brush head of printing assembly is suspended above screen board sliding assembly.

[0030] The annular rotary body component is installed on component fixed assembly;When the pneumatic control assembly controls component fixed assembly to move up and down, it drives annular rotary body component to move synchronously;After component fixed assembly rises, it is in gear transmission connection with screen board sliding assembly (after falling, the two are not in contact), when screen board sliding assembly slides horizontally, it drives annular rotary body component to rotate synchronously, and printing assembly is silk-screen printed on the arc surface of annular rotary body component when annular rotary body component rotates.

[0031] In the embodiment, the gear transmission connection of component fixed assembly and screen board sliding assembly adopts belt gear synchronous transmission mode, to replace existing servo motor drive. A belt rack is arranged in screen board sliding assembly, and the gear on the belt rack is engaged with the gear on the rotating fixed rod in component fixed assembly, to generate force transmission, realize the synchronous rotary motion of annular rotary body component, so that silk-screen printing position is accurately controlled, and belt gear transmission structure is simpler, with lower cost, and easy to maintain.

[0032] Take the annular rotary body component, the annular knob 2 as an example, as shown in Figure 3 , the pneumatic control assembly includes cylinder 3, manual air valve 4, first air pipe 5 and second air pipe 6; the cylinder 3 is fixed on the base 1 (as shown in the middle area), the manual air valve 4 is fixed on a corner of the base 1, the air inlet of the manual air valve 4 is connected with the air inlet pipe, one air outlet of the manual air valve 4 is connected with the air inlet of the cylinder 3 through the first air pipe 5, the other air outlet of the manual air valve 4 is connected with the exhaust port of the cylinder 3 through the second air pipe 6, and the telescopic rod of the cylinder 3 is installed with the component fixing assembly. Figure 2

[0033] Among them, the two outer sides of the manual air valve 4 are flush with the two right angle sides of a corner of the base 1, and the air inlet is externally connected with the air inlet pipe. The air inlet pipe is a compressed air pipe, which provides compressed air from the air inlet 41 into the manual air valve 4. The manual air valve 4 is a two-position valve, which can switch the flow direction of compressed air by manually adjusting the direction of the manual lever on the top. The cylinder is a two-position working cylinder, and compressed air flows into the rising cavity or the falling cavity of the cylinder 3 through the corresponding air pipe, so that the telescopic rod of the cylinder 3 moves upward or downward, realizing the lifting control of the cylinder 3. The lifting movement of the telescopic rod drives the corresponding lifting movement of the component fixing assembly, and lifts the annular knob 2 that needs to be silk-screened up and down.

[0034] Preferably, in order to control the lifting speed of the cylinder, the pneumatic control assembly further comprises two speed regulating air valves 7, one speed regulating air valve is installed between the first air pipe 5 and the air inlet of the cylinder 3, and the other speed regulating air valve is installed between the second air pipe 6 and the exhaust port of the cylinder 3. Specifically, the air inlet of the speed regulating air valve is pneumatically connected with the air outlet of the corresponding air pipe, and the air outlet of the speed regulating air valve is pneumatically connected with the corresponding air port of the cylinder 3. The speed regulating air valve is used to adjust the flow of compressed air in the cylinder, so as to control the speed of the lifting movement of the telescopic rod.

[0035] Please refer to Figure 4 , the component fixing assembly includes rotating fixing rod 8, bearing support 9 and bearing 10; the bearing 10 is installed in the horizontal through hole of the bearing support 9, one end of the rotating fixing rod 8 is installed with the annular knob 2, the other end of the rotating fixing rod 8 passes through the inner hole of the bearing 10 and extends out of the bearing support 9, the other end of the rotating fixing rod 8 is in gear transmission connection with the meshing transmission connection of the mesh plate sliding assembly, and the bearing support 9 is installed on the telescopic rod of the cylinder 3.

[0036] ​The embodiment can simultaneously silk screen two annular knobs 2, and two rotating fixing rods 8 are arranged, two parallel horizontal through holes are arranged on the bearing support 9, two bearings (a total of four bearings) are arranged in each horizontal through hole, the rotating fixing rod 8 penetrates the inner hole of the bearing and rotates synchronously with the bearing. A vertical through hole is further arranged between the two horizontal through holes, the telescopic rod of the air cylinder 3 is inserted into the vertical through hole and fixed with the air cylinder, so that the telescopic rod can drive the bearing support 9 to ascend and descend simultaneously when the telescopic rod ascends and descends. The rotating fixing rod 8 needs to penetrate the entire bearing support 9 and extend for a length, which is relatively long. In order to increase the stability of the rotating fixing rod 8 during rotation and avoid too much jumping, the two bearings are respectively arranged at the two ends (the front hole and the out hole) of the horizontal through hole.

[0037] One end of the rotating fixing rod 8 is provided with a circular clamping groove, which is slightly in interference fit with one end of the annular knob 2, the annular knob 2 is clamped in the circular clamping groove and is not easy to slide. The other end of the rotating fixing rod 8 is provided with a gear 81, the gear 81 is engaged with the gear on the belt gear rack 141 below the screen plate bracket in the screen plate sliding assembly, so as to realize force transmission; the engagement area is shown by the dashed box in the middle of the figure, and the specific meshing is shown in the enlarged view below. Figure 4

[0038] Please refer to Figure 4 and Figure 5 together, the screen plate sliding assembly includes four slide rail foot supports 11, two slide rail fixing frames 12, two slide rails 13, a screen plate bracket 14 and a silk screen plate 15. The two slide rail foot supports 11 are fixed side by side on the two sides of the base 1, the two ends of one slide rail fixing frame 12 are respectively arranged at the top ends of the two slide rail foot supports opposite to each other, the two slide rails 13 are respectively arranged (such as screwed and fixed) on the two slide rail fixing frames 12, two sliding blocks 15 are arranged on each slide rail 13, the screen plate bracket 13 is screwed and fixed on the four sliding blocks 16, and the silk screen plate 14 is clamped and fixed in the hollow clamping groove on one side of the screen plate bracket 13. A belt gear rack 141 is fixed below the clamping groove, the gear on the belt gear rack 141 is engaged with the gear 81 on the other end of the rotating fixing rod 8, when the screen plate bracket 13 moves, the belt gear rack 141 drives the rotating fixing rod 8 to rotate synchronously.

[0039] ​The slide rail foot support 11 mainly plays a supporting role and is fixed on the base 1 by screws. Two slide rail foot supports 11 are arranged side by side and are spaced apart by a preset distance. Two groups of slide rail foot supports are oppositely arranged on two corners of the base. The slide rail foot support 11 at the edge is flush with the side surface of the base 1. The top end of each slide rail foot support 11 is inwardly provided with an L-shaped notch. The two ends of the slide rail fixing frame 12 are placed in the notch. The two ends of the slide rail fixing frame 12 can be fixed in the notch by screwing or pasting. The slide rail fixing frame 12 plays a role of increasing the bearing capacity of the slide rail 13 and providing a supporting force. The sliding block 16 slides back and forth along the slide rail 13. Based on the screwing of the sliding block 16 and the screen plate bracket 14, the sliding block 16 drives the screen plate bracket 14 to move at the same time, so that the screen plate 15 on the screen plate bracket 14 moves synchronously, facilitating subsequent screen printing.

[0040] The screen plate 15 is one of the main components in the screen printing operation. The screen plate mainly comprises a frame and a screen plate main body. The frame is used for fixing the screen plate and is provided with a slot and a limiting groove on the surface to adapt to screen plate main bodies of different specifications. The screen plate main body is usually woven from stainless steel or polyester fiber. The characteristics of the screen plate main body determine the accuracy of the printed pattern.

[0041] Preferably, the screen plate sliding assembly further comprises two limiting blocks 17, which are respectively clamped on both sides of one slide rail (such as the slide rail located on the outer side) and are screwed to the slide rail fixing frame 12 below the slide rail. The limiting block 17 is composed of a block body and two clamping blocks extending downward from both ends of the block body, forming a concave shape with an opening downward. The block body is used to block the moving position of the screen plate bracket 14 on the slide rail 13. The two clamping blocks are used to fix the two sides of the slide rail fixing frame 12. The distance between the two limiting blocks 17 is the movable range of the screen plate bracket 14. In specific implementation, the limiting position of the limiting block 17 on the slide rail fixing frame 12 can be adjusted (the screw is unscrewed, the appropriate position is selected, and then the screw is screwed in) according to the needs, so as to adjust the moving range of the screen plate bracket 14.

[0042] In specific implementation, a rubber pad can be fixed on the inner side opposite to the two limiting blocks 17 to buffer the impact force of the screen plate bracket 14 hitting the limiting block 17 and protect the limiting block 17.

[0043] Preferably, the screen plate sliding assembly further comprises a screen plate side baffle 18 and a handle 19. The screen plate side baffle 18 is installed (such as screwed and fixed) on the outer side of the screen plate bracket 14 (on the same side as the manual air valve 4). The handle 19 is installed (such as screwed and fixed) on the outer side of the screen plate side baffle 18.

[0044] The side baffle 18 of the screen plate corresponds to the side of the clamping groove, which plays a certain fixing role for the screen printing plate 15. The screen plate bracket 14 is pulled by holding the handle 19, which facilitates manual gripping to control the sliding of the screen plate bracket 14.

[0045] The printing assembly includes a ground support 20, an overhanging support 21, a fixed support 22 and a silk printing 23. The lower end of the ground support 20 is fixed on one side of the base 1, and the upper end of the ground support 20 is fixed on one end of the overhanging support 21 by screwing. The other end of the overhanging support 21 is installed with the fixed support 22, and the fixed support 22 is installed below the silk printing 23.

[0046] The ground support 20 plays a supporting role, allowing the overhanging support 21 to hang in the air. The overhanging support 21 plays a fixed supporting role, allowing the silk printing 23 to hang above the screen printing plate 15. The silk printing 23 is one of the important accessories in silk printing operation, and the number of silk printing 23 is the same as the number of rotating fixed rods 8. In this embodiment, two silk printing 23 are provided, which are installed in parallel at a predetermined distance, and the distance between the two silk printing is consistent with the two annular knobs 2. The fixed support 22 is similar to a hanging fork, and the upper part (equivalent to the handle) of the fixed support 22 is provided with a waist-shaped hole 24. The fixed support 22 is fixed on the end face of the other end of the overhanging support 21 by screwing in the screw, and the position of the screw in the waist-shaped hole can adjust the height of the silk printing. The lower part (equivalent to the prongs) of the fixed support 22 is provided with two recessed clamping grooves, and the two silk printing 23 are inserted into the corresponding recessed clamping grooves and screwed in the screw for screwing. When manually pulling the screen printing plate, the silk printing 23 is responsible for evenly spreading the ink on the screen printing plate, and printing on the arc surface of the annular knob through the screen printing plate.

[0047] Please continue to refer to Figures 2 to 7 , the working principle of the portable silk printing device is:

[0048] Preparation work: first hold the handle 19, slide the screen plate bracket 14 to the left (as shown by the arrow above) to abut against the left limiting block 17. The compressed air pipe is connected to the air inlet 41 of the hand valve 4, and the hand lever of the hand valve 4 is turned to make the extension rod of the air cylinder 3 move downward, driving the entire component fixing assembly to move downward. Adjust the position of the screw in the waist-shaped hole of the fixed support 22 to adjust the up-down position of the silk printing 23, so that the silk printing 23 can effectively contact the screen printing plate 15 to meet the needs of silk printing.

[0049] Start silk printing:

[0050] First, install two annular knobs 2 on the rotating fixed rod 8 in the ink smearing area A (as shown in the figure), and then install the screen plate bracket 14 on the rotating fixed rod 8 in the screen plate bracket installation area B (as shown in the figure). Figure 6The manual dial lever of the manual air valve 4 is dialed to move the telescopic rod of the air cylinder 3 upward, and drive the whole component fixing assembly and the annular knob 2 to move upward.

[0051] The second step, hold the handle 19, and slowly move the screen plate bracket 14 to the right until it abuts against the limiting block on the right. Figure 7 As shown, the screen plate bracket 14 is slowly moved to the right until it abuts against the limiting block on the right. During the moving process, the screen plate 15 is synchronously slid to the right, the gear on the belt gear rack 141 below the screen plate bracket 14 is engaged with the gear 81 on the other end of the rotation fixing rod 8, force transmission is generated, the annular knob 2 is synchronously rotated, the arc surface of the annular knob 2 is in contact with the silk printing plate 23, and the arc surface of the annular knob 2 is rotated during the moving of the printing plate, so that the silk printing is completed on the arc surface of the annular knob 2.

[0052] The third step, the manual dial lever is dialed to move the telescopic rod of the air cylinder downward, and drive the whole component fixing assembly and the annular knob 2 to move downward. After the annular knob 2 is removed, the screen plate bracket 14 is slid to the left until it abuts against the limiting block 17 on the left, and the silk printing work is completed.

[0053] The first step to the third step are repeated subsequently, and the silk printing can be recycled.

[0054] In summary, the portable silk printing device for the annular rotary body component is provided, gear transmission between the screen plate bracket and the rotation fixing rod can ensure stable transmission of power, and stability is improved. The belt gear transmission structure is relatively simple, maintenance cost is low, and maintenance is easy. The linear sliding of the silk printing screen plate in the horizontal direction is accurately synchronized with the rotation of the annular knob, so that the accuracy of the silk printing position is ensured. The up-down position of the silk printing plate is adjustable, the silk printing requirements of annular rotary body components with different sizes and shapes can be met, and the adaptability is high. The overall structure of the portable silk printing device is simple, easy to carry and move, and does not need to be fixed and installed, and is suitable for on-site operation. The device is simple to operate, easy to use, and does not need to be operated by professional personnel. Compared with traditional manual printing, the device can improve printing efficiency, save time and labor cost. Compared with the existing large silk printing equipment, the cost of the portable silk printing device is low, and the portable silk printing device is suitable for small and medium-sized enterprises or individuals.

[0055] The above-mentioned function modules are only used for example, and in actual application, the above-mentioned functions can be completed by different function modules according to needs, that is, the above-mentioned functions are divided into different function modules to complete all or part of the above-mentioned functions.

[0056] It can be understood that, for ordinary skilled persons in the art, the technical scheme and the utility model concept of the utility model can be replaced or changed equivalently, and all these changes or replacements shall belong to the protection scope of the claims attached to the utility model.

Claims

1. A portable screen printing device for a ring-shaped rotating component, used for screen printing on the arc surface of the ring-shaped rotating component, characterized in that, It includes a base, a pneumatic control assembly, a component fixing assembly, a screen sliding assembly, and a printing assembly; the pneumatic control assembly, the screen sliding assembly, and the printing assembly are disposed on the base; the component fixing assembly is mounted on the pneumatic control assembly, and the brush head of the printing assembly is suspended above the screen sliding assembly; The annular rotating component is mounted on the component fixing assembly, and the pneumatic control assembly controls the component fixing assembly to move up and down. After the component fixing assembly rises, it is connected to the screen sliding assembly by gear transmission. When the screen sliding assembly slides horizontally, it drives the annular rotating component to rotate synchronously. When the annular rotating component rotates, the brush head of the printing assembly screens the arc surface of the annular rotating component.

2. The portable screen printing device for a ring-shaped rotating component according to claim 1, characterized in that, The pneumatic control assembly includes a cylinder, a manual air valve, a first air pipe, and a second air pipe. The cylinder is fixed on the base, the manual air valve is fixed on one corner of the base, the air inlet of the manual air valve is connected to the air inlet pipe, one air outlet of the manual air valve is connected to the air inlet of the cylinder through the first air pipe, and the other air outlet of the manual air valve is connected to the air outlet of the cylinder through the second air pipe. The component fixing assembly is installed on the telescopic rod of the cylinder.

3. The portable screen printing device for a ring-shaped rotating component according to claim 2, characterized in that, The pneumatic control assembly also includes two speed-regulating valves. One speed-regulating valve is installed between the first air pipe and the air inlet of the cylinder, and the other speed-regulating valve is installed between the second air pipe and the air outlet of the cylinder.

4. The portable screen printing device for a ring-shaped rotating component according to claim 2, characterized in that, The component fixing assembly includes a rotating fixing rod, a bearing bracket, and a bearing; The bearing is installed in the horizontal through hole of the bearing bracket. One end of the rotating fixing rod is equipped with an annular knob, and the other end of the rotating fixing rod passes through the inner hole of the bearing and extends out of the bearing bracket. The other end of the rotating fixing rod is engaged with the mesh plate sliding assembly for transmission. The bearing bracket is installed on the telescopic rod of the cylinder.

5. The portable screen printing device for a ring-shaped rotating component according to claim 4, characterized in that, The screen sliding assembly includes four slide rail foot brackets, two slide rail fixing frames, two slide rails, a screen bracket, and a screen printing screen. Two slide rail support brackets are fixed side by side on both sides of the base. The two ends of a slide rail fixing bracket are respectively installed on the top of the two opposing slide rail support brackets. Two slide rails are respectively installed on the two slide rail fixing brackets. Two sliders are installed on each slide rail. The screen plate bracket is screwed and fixed on the four sliders. The screen printing screen is fixed in the slot with a hollowed-out groove on one side of the screen plate bracket. A belt rack is fixed below the slot. The gear on the belt rack is meshed with the gear on the other end of the rotating fixing rod. When the screen plate bracket moves, the belt rack drives the rotating fixing rod to rotate synchronously.

6. The portable screen printing device for a ring-shaped rotating component according to claim 5, characterized in that, The sliding assembly of the mesh plate also includes two limiting blocks, which are respectively locked on both sides of a slide rail and screwed to the slide rail fixing frame below the slide rail.

7. The portable screen printing device for a ring-shaped rotating component according to claim 5, characterized in that, The sliding assembly of the mesh panel also includes a mesh panel side baffle and a handle; the mesh panel side baffle is installed on the outside of the mesh panel bracket, and the handle is installed on the outside of the mesh panel side baffle.

8. The portable screen printing device for a ring-shaped rotating component according to claim 5 or 7, characterized in that, The printing assembly includes a base bracket, a cantilever bracket, a fixed bracket, and a screen printing unit; the lower end of the base bracket is fixed to one side of the base, one side of the upper end of the base bracket is screwed to one end of the cantilever bracket, the other end of the cantilever bracket is fitted with a fixed bracket, and the screen printing unit is installed below the fixed bracket.

9. The portable screen printing device for a ring-shaped rotating component according to claim 4, characterized in that, There are two rotating fixing rods. The bearing bracket has two parallel horizontal through holes. Two bearings are installed in each horizontal through hole. The rotating fixing rod passes through the inner hole of the bearing and rotates synchronously with the bearing.

10. The portable screen printing device for a ring-shaped rotating component according to claim 8, characterized in that, The upper part of the fixed bracket is provided with an oblong hole, and a screw is screwed into the oblong hole to fix the fixed bracket to the end face of the other end of the cantilever bracket.

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