Multi-gear grooved wheel intermittent mechanism

Abstract

The multi-gear grooved wheel intermittent mechanism comprises a drive plate, a grooved wheel, a fixed round pin and an adjustable round pin, the fixed round pin is fixed to the edge of the drive plate, three round shallow grooves are formed in the edge of the drive plate, and the distances from the round shallow grooves to the axis of the drive plate are equal to the distances from the fixed round pin to the axis of the drive plate. Wherein one circular shallow groove and the fixed round pin are symmetrically arranged on two sides of a central shaft of the driving plate, and the other two circular shallow grooves and the fixed round pin are respectively positioned at three vertexes of an equilateral triangle; the three adjustable round pins are mounted on the driving plate through a positioning mechanism, and the three adjustable round pins are respectively clamped in the three round shallow grooves or moved to the middle part of the driving plate; a plurality of radial grooves are evenly distributed in the periphery of the grooved wheel. According to the intermittent mechanism, the fixed round pin and the adjustable round pin are arranged on the driving plate, and the intermittent mechanism can work in various intermittent ratio modes by changing the position of the adjustable round pin, so that the unnecessary waiting time of workpieces or tools in the transmission process can be reduced by utilizing the intermittent mechanism, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a multi-gear Geneva intermittent mechanism with adjustable intermittent ratio, belonging to the technical field of conveying devices. Background Art

[0002] A die-cutting machine, also known as a beer machine, a cutting machine or a numerical control stamping machine, is mainly used for die-cutting (full cutting, half cutting), indentation, hot stamping, laminating and automatic waste discharging of non-metallic materials such as self-adhesive labels, EVA, double-sided tape, etc. As a key part of the die-cutting machine, the intermittent mechanism is installed on one side of the transmission surface, and its function is to synchronize the paper transmission beat with the working beat of the die-cutting machine through a specific motion law curve and periodic motion.

[0003] Common intermittent mechanisms include Geneva intermittent mechanism, ratchet intermittent mechanism and incomplete gear intermittent mechanism. They all show their respective disadvantages in the actual production process. The disadvantage of the ratchet intermittent mechanism is that the transmission force is small, and there is impact and noise during work, so it is only suitable for occasions with low speed, small rotation angle and low power; the incomplete gear intermittent mechanism has complex technology, and there will be a large impact at the beginning and end of the movement of the driven wheel, so it is mostly used in low-speed and light-load occasions; although the Geneva intermittent mechanism does not have the above defects, its intermittent ratio cannot be adjusted, that is, once the rotation angle of the Geneva intermittent mechanism is determined, it cannot be adjusted, which limits its applicability in a variety of applications.

[0004] At present, the Geneva intermittent mechanism is mostly used in the intermittent paper feeding device. Since the rotation angle of the Geneva intermittent mechanism cannot be adjusted and the intermittent ratio cannot be changed, the actual intermittent ratio is always greater than the required intermittent ratio, and the gap time is greater than the required gap time, resulting in low production efficiency. On an automated production line, the Geneva intermittent mechanism is often used to control the transmission speed and intermittent time of workpieces or tools. By adjusting the intermittent ratio, the production efficiency of the production line can be optimized and unnecessary waiting time can be reduced; in packaging machinery, the Geneva intermittent mechanism can control the supply speed of packaging materials and the interval of packaging actions. By changing the intermittent ratio, efficient processing of different packaging specifications and materials can be achieved; in printing machinery, the Geneva intermittent mechanism can control the rotation and stop of printing cylinders to ensure printing quality and efficiency. By adjusting the intermittent ratio, different printing materials and printing requirements can be adapted. For example, in printing machinery, when printing patterns with different numbers in equal-length strips, using a multi-gear Geneva intermittent mechanism can save the cost of multiple single-intermittent-ratio mechanical equipment and improve production efficiency at the same time. Therefore, it is very necessary to design a multi-gear Geneva intermittent mechanism with adjustable intermittent ratio. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a multi-gear Geneva mechanism with adjustable intermittent ratio for the drawbacks of the prior art, so as to reduce the unnecessary waiting time of workpieces or tools during the transmission process and improve production efficiency.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A multi-gear Geneva mechanism includes a dial, a Geneva wheel, a fixed round pin and three adjustable round pins. The fixed round pin is fixed at the edge of the front surface of the dial. Three circular shallow grooves are provided at the edge of the back surface of the dial. The distances from the three circular shallow grooves and the fixed round pin to the axis of the dial are all equal. One of the circular shallow grooves and the fixed round pin are symmetrically arranged on both sides of the central axis of the dial, and the other two circular shallow grooves and the fixed round pin are respectively located at the three vertices of an equilateral triangle. The three adjustable round pins are installed on the dial through a positioning mechanism. The positioning mechanism clamps the three adjustable round pins in the three circular shallow grooves respectively or moves them to the middle of the dial. The central axis of the Geneva wheel is parallel to the central axis of the dial, and a plurality of radial grooves matching the fixed round pin and the adjustable round pins are evenly distributed on the periphery of the Geneva wheel.

[0008] For the above multi-gear Geneva mechanism, the positioning mechanism includes a spring and a screw corresponding to each adjustable round pin. Each circular shallow groove is provided with a lead groove leading to the middle of the dial. Each adjustable round pin includes a cylindrical pin and a rectangular sliding plate. The rectangular sliding plate is slidably installed in the corresponding lead groove, and the two long sides of the rectangular sliding plate are in sliding contact with the inner wall of the lead groove. The diagonal of the rectangular sliding plate is smaller than the diameter of the circular shallow groove. The diameter of the cylindrical pin is the same as that of the fixed round pin. The cylindrical pin is located on the front surface of the dial and one end of it is fixedly connected to the rectangular sliding plate. One end of the spring is connected to the corresponding rectangular sliding plate, and the other end is connected to the middle of the dial through a screw.

[0009] For the above multi-gear Geneva mechanism, four radial grooves are provided on the periphery of the Geneva wheel.

[0010] For the above multi-gear Geneva mechanism, four convex teeth are evenly distributed on the periphery of the Geneva wheel, and one radial groove is provided on each convex tooth.

[0011] For the above multi-gear Geneva mechanism, a convex platform is provided in the middle of the front surface of the dial.

[0012] The present utility model is provided with a fixed round pin and three adjustable round pins with adjustable positions on the dial. By changing the positions of the adjustable round pins, the Geneva mechanism can work in multiple intermittent ratio modes. Therefore, the unnecessary waiting time of workpieces or tools during the transmission process can be reduced by using this Geneva mechanism, and the production efficiency can be improved. Description of the Drawings

[0013] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is Figure 1 a schematic diagram of the back structure of

[0016] Figure 3 a schematic diagram of the present utility model operating in a 1:3 intermittent ratio mode;

[0017] Figure 4 a schematic diagram of the present utility model operating in a 1:1 intermittent ratio mode;

[0018] Figure 5 a schematic diagram of the present utility model operating in a 3:1 intermittent ratio mode;

[0019] Figure 6 is a connection schematic diagram of the adjustable round pin and the dial;

[0020] Figure 7 is a structural schematic diagram of the adjustable round pin;

[0021] Figure 8 is a structural schematic diagram of the grooved wheel;

[0022] Figure 9 is a structural schematic diagram of the dial.

[0023] The reference numerals in the figure are as follows: 1, dial; 2, first adjustable round pin; 3, second adjustable round pin; 4, fixed round pin; 5, third adjustable round pin; 6, grooved wheel; 7, spring; 8, screw.

[0024] 1-1, lead groove; 1-2, circular shallow groove; 1-3, boss; 2-1, cylindrical pin; 2-2, rectangular slide plate; 6-1, convex tooth; 6-2, radial groove. Detailed implementation manners

[0025] Refer to Figures 1-9 , the present utility model mainly includes a circular dial 1, a grooved wheel 6, a fixed round pin 4 and three adjustable round pins, and the three adjustable round pins are respectively a first adjustable round pin 2, a second adjustable round pin 3 and a third adjustable round pin 5.

[0026] Refer to Figure 1 and Figure 9, the central axis of the dial 1 is connected to the driving device, and the driving device can drive the dial 1 to rotate around its central axis. The fixed round pin 4 is fixed at the edge of the front side of the dial 1, and three circular shallow grooves 1-2 are opened at the edge of the back side of the dial 1 as the positioning grooves for the three adjustable round pins. The distances from the three circular shallow grooves 1-2 and the fixed round pin 4 to the axis of the dial 1 are all equal. One of the circular shallow grooves 1-2 and the fixed round pin 4 are symmetrically arranged on both sides of the central axis of the dial 1, and the other two circular shallow grooves 1-2 and the fixed round pin 4 are respectively located at the three vertices of an equilateral triangle. Three lead grooves 1-1 are respectively opened from the three circular shallow grooves 1-2 to the position of the central axis of the dial 1. The width of the lead groove 1-1 is smaller than the diameter of the circular shallow groove 1-2.

[0027] See Figure 6 and Figure 7 , the structures of the three adjustable round pins are the same. Each adjustable round pin includes a cylindrical pin 2-1 and a rectangular slide plate 2-2. The diameter of the cylindrical pin 2-1 is the same as that of the fixed round pin 4. The rectangular slide plate 2-2 is slidably installed in the lead groove 1-1, and the two long sides of the rectangular slide plate 2-2 are in sliding contact with the inner wall of the lead groove 1-1. The rectangular slide plate 2-2 is connected to the middle part of the dial 1 through a spring 7. The cylindrical pin 2-1 is located on the front side of the dial 1 and one end of it is fixedly connected to the rectangular slide plate 2-2. The diagonal of the rectangular slide plate 2-2 is smaller than the diameter of the circular shallow groove 1-2 and can rotate in the circular shallow groove 1-2. Under normal circumstances, the elastic force of the spring 7 makes the rectangular slide plate 2-2 and the cylindrical pin 2-1 stay at a position close to the central axis of the dial 1. When the rectangular slide plate 2-2 slides into the circular shallow groove 1-2 under the action of an external force and then rotates 90 degrees, the rectangular slide plate 2-2 can be clamped in the circular shallow groove 1-2. At this time, the cylindrical pin 2-1 is in the working position, and the distances from the cylindrical pin 2-1 and the fixed round pin 4 to the axis of the dial 1 are equal.

[0028] See Figure 1 and Figure 8 , the central axis of the sprocket wheel 6 is parallel to the central axis of the dial 1. The sprocket wheel 6 is rotationally connected to the frame through its central axis. Four convex teeth 6-1 are evenly distributed on the periphery of the sprocket wheel 6. Each convex tooth 6-1 is provided with a radial groove 6-2 that matches the fixed round pin 4 and the cylindrical pin 2-1. When the dial 1 rotates, the fixed round pin 4 and the cylindrical pin 2-1 in the working position can slide into the radial groove 6-2 and drive the sprocket wheel 6 to rotate. When both the fixed round pin 4 and the cylindrical pin 2-1 fall out of the radial groove 6-2, the sprocket wheel 6 stops rotating.

[0029] See Figure 1 , Figure 2 and Figure 5, after the first adjustable round pin 2 is installed, it and the fixed round pin 4 are respectively located on both sides of the central axis of the dial 1. The rectangular slides 2-2 of the second adjustable round pin 3 and the third adjustable round pin 5 are respectively installed in the other two lead grooves 1-1. By adjusting the positions of the three adjustable round pins, this multi-gear ratchet mechanism can work in a 1:3 intermittent ratio mode, a 1:1 intermittent ratio mode, or a 3:1 intermittent ratio mode.

[0030] Figure 3 is a schematic diagram of the present utility model working in a 1:3 intermittent ratio mode. At this time, all three adjustable round pins are in positions close to the central axis of the dial 1, and their cylindrical pins 2-1 cannot drive the ratchet wheel 6 to rotate. Only the fixed round pin 4 can drive the ratchet wheel 6 to rotate. When the dial 1 rotates one full circle, the ratchet wheel 6 rotates only once (rotating 90 degrees at a time), and the ratio of the rotation time to the stopping time of the ratchet wheel 6 is 1:3.

[0031] Figure 4 is a schematic diagram of the present utility model working in a 1:1 intermittent ratio mode. At this time, the cylindrical pin 2-1 of the first adjustable round pin 2 is in the working position and drives the ratchet wheel 6 to rotate together with the fixed round pin 4. The second adjustable round pin 3 and the third adjustable round pin 5 are both in positions close to the central axis of the dial 1, and their cylindrical pins 2-1 cannot drive the ratchet wheel 6 to rotate. When the dial 1 rotates one full circle, the ratchet wheel 6 rotates twice (rotating 90 degrees each time), and the ratio of the rotation time to the stopping time of the ratchet wheel 6 is 1:1.

[0032] Figure 5 is a schematic diagram of the present utility model working in a 3:1 intermittent ratio mode. At this time, the cylindrical pins 2-1 of the second adjustable round pin 3 and the third adjustable round pin 5 are both in the working positions, and they drive the ratchet wheel 6 to rotate together with the fixed round pin 4. The first adjustable round pin 2 is in a position close to the central axis of the dial 1, and its cylindrical pin 2-1 cannot drive the ratchet wheel 6 to rotate. When the dial 1 rotates one full circle, the ratchet wheel 6 rotates three times (rotating 90 degrees each time), and the ratio of the rotation time to the stopping time of the ratchet wheel 6 is 3:1.

[0033] See Figure 1 and Figure 4 , a boss 1-3 is provided in the middle of the front surface of the dial 1, which can not only increase the mechanical strength of the dial 1, but also, during the process of the ratchet wheel 6 stopping rotation, the arc edges of the three outwardly protruding parts of the boss 1-3 cooperate with the arc edges between the two convex teeth 6-1 of the ratchet wheel 6 to limit the ratchet wheel 6 and prevent it from rotating. To avoid interference between the boss 1-3 and the ratchet wheel 6 when the intermittent ratio is 1:1, the part of the boss 1-3 corresponding to the first adjustable round pin 2 shrinks towards the middle of the dial 1.

[0034] The utility model is provided with a fixed round pin and three adjustable round pins with adjustable positions on a dial. By changing the positions of the adjustable round pins, the Geneva mechanism can work in multiple intermittent ratio modes. Therefore, the Geneva mechanism can be used to reduce the unnecessary waiting time of workpieces or tools during the transmission process and improve production efficiency.

[0035] In addition, more intermittent ratios can be obtained by changing the number of radial slots on the Geneva wheel 6, thereby further improving the applicability of the utility model.

Claims

1. A multi-gear sheave intermittent mechanism, characterized in that: The invention comprises a dial (1), a groove wheel (6), a fixed round pin (4) and three adjustable round pins, wherein the fixed round pin (4) is fixed at the edge of the front side of the dial (1), and three circular shallow grooves (1-2) are provided at the edge of the back side of the dial (1), and the distances between the three circular shallow grooves (1-2) and the fixed round pin (4) and the axis of the dial (1) are all equal, one of the circular shallow grooves (1-2) and the fixed round pin (4) are symmetrically arranged on both sides of the central axis of the dial (1), and the other two circular shallow grooves (1-2) and the fixed round pin (4) are symmetrically arranged on both sides of the central axis of the dial (1), and the other two circular shallow grooves (1-2) and the fixed round pin (4) are symmetrically arranged on both sides of the central axis of the dial (1). The grooves (1-2) and the fixed round pins (4) are respectively located at the three vertices of an equilateral triangle; the three adjustable round pins are mounted on the dial (1) via a positioning mechanism, and the positioning mechanism respectively clamps the three adjustable round pins into the three circular shallow grooves (1-2) or moves them to the middle of the dial (1); the central axis of the groove wheel (6) is parallel to the central axis of the dial (1), and a plurality of radial grooves (6-2) matching the fixed round pins (4) and the adjustable round pins are evenly distributed around the periphery of the groove wheel (6).

2. A multi-gear sheave intermittent mechanism according to claim 1, characterized in that: The positioning mechanism comprises a spring (7) and a screw (8) corresponding to each adjustable round pin, each round shallow groove (1-2) is provided with a lead groove (1-1) toward the middle of the dial (1), each adjustable round pin comprises a cylindrical pin (2-1) and a rectangular slide plate (2-2), the rectangular slide plate (2-2) is slidably mounted in the corresponding lead groove (1-1) and the two long sides of the rectangular slide plate (2-2) are in sliding contact with the inner wall of the lead groove (1-1), the diagonal of the rectangular slide plate (2-2) is smaller than the diameter of the round shallow groove (1-2), the diameter of the cylindrical pin (2-1) is the same as the diameter of the fixed round pin (4), the cylindrical pin (2-1) is located on the front of the dial (1) and one end thereof is fixedly connected to the rectangular slide plate (2-2), one end of the spring (7) is connected to the corresponding rectangular slide plate (2-2), and the other end is connected to the middle of the dial (1) through the screw (8).

3. A multi-gear sheave intermittent mechanism according to claim 1 or 2, characterized in that: Four radial grooves (6-2) are provided on the periphery of the groove wheel (6).

4. A multi-gear sheave intermittent mechanism according to claim 3, characterized in that: Four convex teeth (6-1) are evenly distributed on the periphery of the groove wheel (6), and a radial groove (6-2) is formed on each convex tooth (6-1).

5. A multi-gear sheave intermittent mechanism according to claim 4, characterized in that: A boss (1-3) is provided in the middle of the front side of the dial (1).

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