Servo cup falling device of curved surface cup printing machine

Abstract

The utility model discloses a kind of curved surface printing cup machine servo cup falling device, belong to printing equipment technical field.This device includes servo motor, belt, cup falling assembly, cup diameter adjusting unit and rack;Servo motor drives cup falling assembly by belt, and the multistage gear transmission chain in cup falling assembly drives four sets of threaded outer rotating sleeve unit two two reverse same-speed rotation.Cup diameter adjusting unit adjusts the radial position of outer rotating sleeve unit by worm, rotation gear, connecting rod swing arm mechanism;Center inner support support rod is adjusted to extend amount by adjusting connecting rod with sliding slot in shutdown state, and position is fixed during production operation.The utility model is independently adjustable to inside and outside diameter, sleeve reverse rotation offsets lateral friction, relies on sleeve thread friction to strip paper cup, reduces cup scraping, cup clamping failure, servo drive rotating speed is adjustable, and cup falling stability is good.

Description

Technical Field

[0001] This utility model relates to a cup dropping device, and more particularly to a servo cup dropping device for a curved surface printing cup machine, belonging to the field of printing equipment technology. Background Technology

[0002] In paper cup curved surface printing equipment, the cup dropping mechanism is responsible for separating the stacked empty paper cups one by one and conveying them to the printing station. The stability of the cup dropping and the ease of changing the cup directly affect the overall printing yield.

[0003] Currently, the cup dropping mechanism of curved surface printing cup machines generally uses a purely mechanical structure such as cam, cylinder, and connecting rod to drive the cup dropping. The timing of the cup dropping action is fixed by mechanical hard limit, making it inconvenient to adjust the cycle and resulting in poor synchronization with the printing host. The cup dropping and separating method mostly adopts a single-sided friction wheel or spiral separating structure, relying on the friction force on one side to peel off the bottom paper cup and feed it. This type of structure has obvious defects: First, unilateral friction on the cup wall easily causes the paper cup to twist and scratch the outer wall of the cup. When encountering thin or conical paper cups, cup jamming and stacking failures occur frequently. Second, cup storage and separation rely on external limiting, which generally only limits the outer ring and lacks internal support. The paper cups are prone to eccentric stacking, resulting in poor material positioning accuracy and difficulty in accurately dropping the paper cups onto the printing mold core below. Third, when it is necessary to change to paper cups of different diameters, the outer limiting parts can only be adjusted one by one. The inner and outer support structures cannot be adjusted independently, and the debugging for changing specifications is time-consuming. Moreover, most of them lack a self-locking structure. After long-term vibration of the equipment, the limiting dimensions are prone to deviation, requiring frequent re-measurement and calibration. Fourth, traditional mechanisms rely on mechanical hard transmission such as cams, cylinders, and connecting rods. It is difficult to flexibly adjust the cup dropping rhythm and cup separation speed. When adapting a machine to different printing speeds, the debugging workload is large. Utility Model Content

[0004] The purpose of this invention is to provide a servo cup dropping device for a curved surface cup printing machine, addressing the current state of the technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A servo cup-dropping device for a curved surface cup printing machine includes a servo motor, a belt, a cup-dropping assembly, and a frame. The servo motor and the cup-dropping assembly are mounted on the frame, and the servo motor drives the cup-dropping assembly to rotate via the belt. The cup-dropping assembly includes an outer rotating sleeve unit, a multi-stage gear transmission link, an inner support rod unit, and a cup diameter adjustment unit. The power transmitted by the belt is distributed and reversed via the multi-stage gear transmission link, driving the outer rotating sleeve units to rotate in opposite directions at the same speed. The outer rotating sleeve units are arranged in a ring around the outside of stacked paper cups. The inner support rod unit includes multiple inner support rods, which are arranged in the central area of ​​the device and are used to extend into the paper cup and support the bottom of the cup. The cup diameter adjustment unit is linked to the outer rotating sleeve unit, and when the cup diameter adjustment unit is activated, it can drive the outer rotating sleeve unit to radially retract or expand to adapt to the outer diameter of the paper cup.

[0006] Preferably, the bottom of the inner support rod is connected to the frame via an adjusting rod. The adjusting rod has a sliding groove. When the machine is stopped, sliding the adjusting rod can change the radial extension of the four inner support rods to match the inner diameter of the paper cup. During production, the position of the inner support rod remains fixed.

[0007] Preferably, the sleeve of the outer rotating sleeve unit is provided with threads.

[0008] Preferably, the cup diameter adjustment unit includes an adjustment handwheel, a worm gear, a rotary gear, and a connecting rod swing arm mechanism; the adjustment handwheel is connected to the worm gear, the worm gear drives the rotary gear to rotate, the rotary gear is hinged to the connecting rod swing arm mechanism, and the connecting rod swing arm mechanism is linked to the outer rotating sleeve unit; the worm gear and the rotary gear form a worm gear transmission structure with self-locking performance; the rotary gear is only used to drive the connecting rod swing arm mechanism to change the radial position of the outer rotating sleeve unit, and does not transmit rotational power to the outer rotating sleeve unit.

[0009] The beneficial effects of this utility model are: 1. Flexible speed adjustment via servo drive: Using a servo motor as the power source, the sleeve speed can be adjusted according to the printing speed of the printing cup host, ensuring good equipment synchronization, avoiding printing misalignment, reducing scrap rate, and overcoming the shortcomings of traditional pure mechanical fixed transmission with no speed adjustment.

[0010] 2. Independent adjustment of inner and outer dimensions: The inner support rod relies on the adjusting connecting rod with sliding groove to manually adjust the inner diameter of the paper cup when the machine is stopped; the outer rotating sleeve relies on the worm gear, rotary gear and connecting rod swing arm mechanism to adjust the outer diameter of the paper cup. The two adjustment mechanisms are independent of each other and do not interfere with each other. They can be calibrated separately when changing paper cup specifications, which is simple to debug and shortens the changeover time.

[0011] 3. The sleeves rotate in opposite directions in pairs: The four sets of external rotating sleeves rotate in opposite directions in pairs, canceling out the lateral friction force acting on the paper cup, so that the paper cup will not twist and avoid scratching the cup wall; the friction force of the outer wall thread of the sleeve is used to peel off the bottom paper cup, effectively solving the problems of cup jamming and cup stacking, and the cup dropping action is smooth, improving the stability of continuous operation of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the servo motor driven cup dropping assembly.

[0014] Figure 3 yes Figure 2 A structural diagram from another angle.

[0015] Figure 4 This is a structural diagram of the cup diameter adjustment unit and the internal support rod unit.

[0016] Figure 5 yes Figure 4 A structural diagram from another angle.

[0017] Figure 6 This is a structural schematic diagram of the linkage swing arm mechanism and the outer rotating sleeve unit.

[0018] Figure 7 This is a structural schematic diagram of the internal support rod unit.

[0019] In the diagram: 1-Servo motor, 2-Belt, 3-Cup dropping assembly, 4-Cup diameter adjustment unit, 5-Frame, 6-Multi-stage gear transmission chain, 7-Outer rotating sleeve unit, 8-Thread, 9-Adjusting handwheel, 10-Worm gear, 11-Rotating gear, 12-Linkage swing arm mechanism, 13-Inner support rod, 14-Adjusting linkage. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figures 1-7 As shown: A servo cup-dropping device for a curved surface cup printing machine includes a servo motor 1, a belt 2, a cup-dropping assembly 3, a cup diameter adjustment unit 4, and a frame 5. The servo motor 1 and the cup-dropping assembly 3 are both mounted and fixed on the frame 5; the output end of the servo motor 1 is connected to the belt 2, and the servo motor 1 inputs rotational power to the cup-dropping assembly 3 through the belt 2.

[0022] The cup-dropping assembly 3 is internally equipped with a multi-stage gear transmission chain 6. The cup-dropping assembly 3 also includes an outer rotating sleeve unit 7 and an inner support rod unit. The outer sleeve of the outer rotating sleeve unit 7 is machined with threads 8. The power transmitted by the belt 2 enters the multi-stage gear transmission chain 6, which completes the power distribution and reversal, driving the four sets of outer rotating sleeve units 7 to rotate in opposite directions at the same speed. The four sets of outer rotating sleeve units 7 are arranged in a ring and are located on the outside of the stacked paper cups during operation.

[0023] The cup diameter adjustment unit 4 includes an adjustment handwheel 9, a worm gear 10, a rotary gear 11, and a connecting rod swing arm mechanism 12. The adjustment handwheel 9 is connected to the worm gear 10, which meshes with and drives the rotary gear 11 to rotate. The rotary gear 11 is hinged to the connecting rod swing arm mechanism 12, which is connected to the outer rotating sleeve unit 7. The worm gear 10 and the rotary gear 11 form a worm gear transmission structure with self-locking capability. The rotary gear 11 only drives the connecting rod swing arm mechanism 12 to change the radial position of the outer rotating sleeve unit 7, without transmitting rotational power to the outer rotating sleeve unit 7. Rotating the adjustment handwheel 9 can simultaneously drive the four sets of outer rotating sleeve units 7 to radially retract or expand, thereby adapting to the outer diameter size of the paper cup.

[0024] The internal support rod unit includes four internal support rods 13 and an adjusting connecting rod 14. The four internal support rods 13 are arranged in the central area of ​​the device. The bottom of the four internal support rods 13 is assembled with the adjusting connecting rod 14, which is mounted on the frame 5. The adjusting connecting rod 14 has a sliding groove. The adjusting connecting rod 14 is slid only when the machine is stopped to change specifications, and the radial extension of the four internal support rods 13 is changed synchronously by relying on the guide of the sliding groove to adapt to the inner diameter of the paper cup. During the production operation of the equipment, the position of the internal support rods 13 remains fixed, and they are used to extend into the stacked paper cups to support and center the bottom of the paper cup stack.

[0025] The frame 5 is equipped with corresponding bearing mounting seats for rotating and supporting the gears and pulleys of the outer rotating sleeve unit 7, the multi-stage gear transmission chain 6, and ensuring smooth transmission operation.

[0026] Working principle After the servo cup dropping device of this curved surface cup printing machine is assembled, two independent adjustments are made when changing the paper cup specifications: The first step is to adjust the inner diameter of the paper cup: the machine is stopped, and the adjusting connecting rod 14 under the sliding frame 5 is adjusted synchronously with the radial extension of the four inner support rods 13 by means of the guiding action of the sliding groove on the adjusting connecting rod 14, so that the inner support rods 13 are adapted to the inner diameter of the paper cup to be processed. After adjustment, the position is locked and fixed, and the production process will not change. The second step is to adjust the outer diameter of the paper cup: rotate the adjusting handwheel 9 of the cup diameter adjusting unit 4. The handwheel drives the worm gear 10 to rotate, the worm gear 10 drives the rotary gear 11 to rotate, and the rotary gear 11 drives the connecting rod swing arm mechanism 12 to move, synchronously adjusting the radial position of the four sets of outer rotating sleeve units 7, so that the outer rotating sleeve units 7 surround the outer wall of the paper cup; the worm gear 10 and the rotary gear 11 form a self-locking, and the position will not shift due to equipment vibration after adjustment.

[0027] Stacked paper cups are placed in the center of the device. The bottom of each cup is fixed and supported by an internal support rod 13, while the outer wall of the cup contacts the threaded outer rotating sleeve unit 7. During operation, the servo motor 1 outputs rotational power, which is transmitted via belt 2 to the multi-stage gear transmission chain 6 inside the cup dropping assembly 3. The multi-stage gear transmission chain 6 distributes and reverses the rotation, driving the four sets of outer rotating sleeve units 7 to rotate in opposite directions at the same speed. The threads 8 on the outer wall of the sleeve generate friction with the outer wall of the paper cup. Simultaneously, the opposing rotation structures counteract the lateral friction on the paper cup, preventing twisting and scratching. The friction generated by the threads peels the bottommost paper cup from the stack downwards, causing it to fall under its own weight and be sent to the printing station. The upper stack of paper cups is continuously supported by the internal support rod 13, enabling continuous, individual cup feeding. The servo motor can adjust its speed according to the actual operating conditions of the printing host to match the overall printing cycle.

[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this utility model. The technical scope of this utility model is not limited to the contents of the specification. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A servo cup-dropping device for a curved surface cup printing machine, characterized in that: The device includes a servo motor, a belt, a cup-dropping assembly, and a frame. The servo motor and cup-dropping assembly are mounted on the frame, and the servo motor drives the cup-dropping assembly to rotate via the belt. The cup-dropping assembly includes an outer rotating sleeve unit, a multi-stage gear transmission link, an inner support rod unit, and a cup diameter adjustment unit. The power transmitted by the belt is distributed and reversed via the multi-stage gear transmission link, driving the outer rotating sleeve units to rotate in opposite directions at the same speed. The outer rotating sleeve units are arranged in a ring around the outside of the stacked paper cups. The inner support rod unit includes multiple inner support rods, which are arranged in the central area of ​​the device and are used to extend into the paper cup and support the bottom of the cup. The cup diameter adjustment unit is linked to the outer rotating sleeve unit, and when the cup diameter adjustment unit is activated, it can drive the outer rotating sleeve unit to radially retract or expand to adapt to the outer diameter of the paper cup.

2. The servo cup dropping device for a curved surface cup printing machine as described in claim 1, characterized in that: The bottom of the inner support rod is connected to the frame via an adjusting rod, and the adjusting rod has a sliding groove.

3. The servo cup dropping device for a curved surface cup printing machine as described in claim 1, characterized in that: The sleeve of the external rotating sleeve unit is provided with threads.

4. The servo cup dropping device for a curved surface cup printing machine as described in claim 1, characterized in that: The cup diameter adjustment unit includes an adjustment handwheel, a worm gear, a rotary gear, and a connecting rod swing arm mechanism. The adjustment handwheel is connected to the worm gear, which drives the rotary gear to rotate. The rotary gear is hinged to the connecting rod swing arm mechanism, which in turn links with the outer rotating sleeve unit. The worm gear and the rotary gear form a worm gear transmission structure with self-locking properties. The rotary gear is only used to drive the connecting rod swing arm mechanism to change the radial position of the outer rotating sleeve unit and does not transmit rotational power to the outer rotating sleeve unit.

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