Abstract: This paper introduces a pneumatic drum-tooth clutch used for winding and unwinding spools and for disengaging and engaging transmission components. Keywords: Drum-tooth pneumatic clutch. This novel clutch, controlled pneumatically, uses drum-tooth gears and a matching mechanism to perform winding, unwinding, and disengaging functions. As shown in Figure a), two drum-tooth gears A and A (with the same module and number of teeth, each corresponding to a tooth) machined at a certain distance on the clutch shaft head 12 are engaged in the working state. Under air pressure, drum-tooth gear A meshes with the inner teeth 13 (drum-tooth gears) of the bushing of the winding/unwinding spool 15. Drum-tooth gear A meshes with the inner drum-tooth gear 11. Gear 5 is connected to the inner drum-tooth gear 11 by screws. The cylinder 10 is fixed to the support ring 9 by bearings. The drum-shaped internal gear 11 is keyed into the sleeve 10. When the gear 5 rotates, it drives the drum-shaped internal gear 11 connected to it to rotate together. The drum-shaped gears A and A' meshing with the drum-shaped internal gear 11 rotate simultaneously, which drives the inner gear 13 of the bushing that meshes with the drum-shaped gear A, i.e., the take-up and untake-down shaft 15, to rotate. The inner gear 13 of the working bushing is fitted into the shaft head of the take-up and untake-down shaft and fixed by the pin 14. The shaft head is located in the three-star wheel composed of three bearings (see Figure b). During operation, the shaft head of the take-up and untake-down shaft... Place it on top of the two bearings, close the pressure cap 16 of the third bearing with a clamping effect, and tighten the handle 17 clockwise. When the pressure cap 16 is locked, the end of the handle 17 is pressed down, which opens the two-position three-way shut-off reversing valve 18. Compressed air enters the inner cavity through the air pipe C, C1 reversing connector 1, and air nozzle pipe 2 through the center hole of the core 3, pushing the clutch shaft head 12 to the drum-shaped tooth meshing position in Figure a. The sealing ring 4 on the core 3 is a static sealing ring, and the sealing ring 8 (Figure c) is a dynamic sealing ring. Compressed air passes through... The small hole on the clutch shaft head 12 causes the sealing ring 8 to expand tightly against the inner wall of the copper sleeve 6, activating the sealing function during the reciprocating movement of the clutch shaft head 12. (The copper sleeve 6 with a flange is fixed in the inner hole of the gear 5 by screws. When changing rolls, simply loosen the handle 17 counterclockwise, the reversing valve 18 switches the air path direction, compressed air is discharged, the spring 7 contracts, and the clutch shaft head 12 moves to the left under the spring force, causing the drum-shaped tooth A to disengage from the inner tooth 13 of the sleeve, and the drum-shaped tooth A meshes with the inner tooth 11.) Disengage the drum-shaped internal teeth 11 (drum-shaped teeth A and Aq are different teeth during movement) and lift the pressure cover 16 to remove the take-up and unwinding spools. [align=center] Pneumatic drum-shaped tooth clutch 1. Steering joint 2. Air nozzle pipe 3. Core 4. Sealing ring 5. Gear 6. Copper sleeve 7. Spring 8. Sealing ring 9. Support ring 10. Sleeve 11. Drum-shaped internal teeth 12. Clutch shaft head 13. Bushing internal teeth 14. Pin 15. Take-up and unwinding spools 16. Pressure cover 17. Handle 18. Reversing valve[/align] This pneumatic drum-shaped tooth clutch has an advanced and reasonable structure, is easy to operate, and is suitable for widespread application in production equipment for adhesive tapes, fabric coating, material composites, papermaking and printing, textile dyeing and printing.