Paper folding machine coupling structure with constant tooth pitch

Abstract

The invention discloses a paper folding machine coupling structure with a constant tooth pitch, which comprises a rack and a plurality of folding shafts, adjusting holes for the folding shafts to pass through are formed in a side plate I and a side plate II of the rack, the two ends of each folding shaft are rotatably connected with adjusting mechanisms, gears with the same size are rotatably connected to a gear fixing plate, and the gears are rotatably connected to a gear fixing plate. The gears are meshed with one another and are connected with the hinge shafts through couplings; the coupler comprises a first outer clamping ring and a clamping ring, the first outer clamping ring is connected with the hinge shafts, the clamping ring is connected with the gear, two hole sites are formed in one side of the clamping ring, the two hole sites are connected with two sliding parts fixedly arranged on the first outer clamping ring in a sliding mode respectively, and when the adjusting mechanism adjusts the distance between the hinge shafts, the first outer clamping ring slides relative to the clamping ring. The pitch of the gears is kept constant; the rotation amplitude of the hinge shaft driven by the adjusting mechanism is too small, the coupler is made of soft materials, when the hinge shaft is adjusted by the adjusting mechanism, the position of the clamping ring is kept unchanged, and the tooth pitch of the gear is kept unchanged.

Description

Technical Field

[0001] The present invention belongs to the technical field of paper machines, and specifically relates to a coupling structure of a paper folding machine with a constant tooth pitch. Background Art

[0002] A paper folding machine is a mechanical device used to automatically fold paper according to specific shapes or creases, and is usually widely used in fields such as printing, packaging, and paper product processing. It processes flat paper into the required three-dimensional structure or folding form according to a preset folding method through a series of mechanical components, mainly used for making instruction manuals or folding brochures, etc. The core technology lies in the coordinated operation of the mechanical structure and the adaptability to paper size and thickness.

[0003] In the prior art, such as the "Folding Machine and Indentation Folding Machine" disclosed in the patent document "CN113636399B", its technical solution can adjust the distance between each paper folding roller according to the thickness of the inserted paper through different gap adjustment structures, and can be reset by a spring to adapt to papers of different thicknesses for folding. However, as can be seen from the attached drawings, the first paper folding roller 31, the second paper folding roller 32, and the third paper folding roller 33 rotate on the frame 1 respectively, and there is no gear transmission at the ends among the three, resulting in poor synchronization, low power transmission efficiency, and unstable operation among the three. Especially in high-speed or high-precision folding tasks, folding deviation is likely to occur due to slipping or vibration, affecting the finished product quality and production efficiency.

[0004] In the prior art, such as the "Gear Transmission Device for a Folding Machine" disclosed in the patent document "CN109230797A", its technical solution installs a gear transmission device on the gear fixing plate 1. Although using gears to connect can ensure the synchronization and power transmission efficiency between the folding shafts, it will make the adjustment between the folding shafts difficult, because the meshing of gears requires a fixed tooth pitch and positional relationship. Once the distance or angle between the shafts is adjusted, the tooth pitch of the gears may change, destroying the meshing accuracy, and even causing jamming or wear problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a coupling structure of a paper folding machine with a constant tooth pitch to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An origami machine coupling structure with a constant pitch, comprising a frame and a number of folding shafts located between side plate one and side plate two of the frame. Adjustment holes for the folding shafts to pass through are provided on both side plate one and side plate two of the frame. Adjusting mechanisms are rotatably connected to both ends of each folding shaft, and the two adjusting mechanisms are respectively installed on side plate one and side plate two. A gear fixing plate is provided on the side of side plate one away from the folding shaft. A number of gears of the same size are rotatably connected to the gear fixing plate, and the gears mesh with each other. The gears and the folding shafts are connected by couplings;

[0008] The coupling includes an outer retaining ring one and a snap ring. The outer retaining ring one is connected to the folding shaft, and the snap ring is connected to the gear. Two holes are provided on one side of the snap ring, and two sliding parts are respectively slidably connected to the two holes. The two sliding parts are fixed on one side of the outer retaining ring one. When the adjusting mechanism adjusts the distance between the folding shafts, the outer retaining ring one and the snap ring slide relative to each other, so that the pitch of the gears remains constant.

[0009] In a further technical solution, the gear is provided with a rotating shaft, the rotating shaft passes through the avoidance hole of the gear fixing plate, and the rotating shaft is rotatably connected to the hole wall of the avoidance hole through bearing two. One end of the rotating shaft is coaxially fixed to the gear, and the other end of the rotating shaft is coaxially fixed to the outer retaining ring two.

[0010] In a further technical solution, the number of bearing two on the rotating shaft is two. A limiting ring one is provided between the two bearing two. The limiting ring one is sleeved on the rotating shaft. Ring-shaped protrusions are provided at both ends of the rotating shaft. There is a space between the limiting ring one and the ring-shaped protrusions, and the bearing two is sleeved on the space of the rotating shaft.

[0011] In a further technical solution, the adjusting mechanism includes a number of adjusting components. The adjusting component includes a fixed block, a moving rod, a connecting block, a driving component and a reset component. The fixed block is fixedly connected to side plate one. The moving rod passes through the fixed block and is slidably connected to the fixed block. One end of the moving rod is fixedly connected to the connecting block. The driving component is used to drive the moving rod to move, and the driving component can also limit the position of the moving rod. The reset component is used to reset the moving rod; the connecting block can drive the folding shaft to move.

[0012] In a further technical solution, one end of the folding shaft passing through side plate one is movably connected to the connecting block through bearing one. The outer wall of bearing one is fixedly connected to the inner wall of the connecting block. A rotating bolt is provided on the connecting block. The connecting block is rotatably connected to side plate one through the rotating bolt; a limiting ring two is provided on the outer retaining ring one of the coupling. The limiting ring two is sleeved on the folding shaft, and the limiting ring two is located between bearing one and the coupling.

[0013] Further technical solution: The driving component includes a support block, a through groove is formed in the support block, one end of the moving rod passes through the through groove, internal threads are provided on the groove wall of the through groove, the support block is provided with a rotating rod, the rotating rod is threadedly connected to the groove wall of the through groove, one end of the rotating rod contacts the moving rod, and the rotation of the rotating rod can drive the moving rod to move.

[0014] Further technical solution: The moving rod is provided with a dial, a rod passing hole is formed in the dial, the moving rod passes through the rod passing hole of the dial, the moving rod is fixedly connected to the hole wall of the rod passing hole, the dial can drive the moving rod to move, the dial is provided with a number of adaptation plates, and a number of the adaptation plates can be selected according to the paper thickness, and the adaptation plates are clamped between the dial and the support block.

[0015] Further technical solution: The reset component includes a reset spring and a reset column, the reset column is installed on the side plate, one end of the reset spring is connected to the reset column, and the other end of the reset spring is connected to the connecting block.

[0016] Further technical solution: The folding shaft passes through the second side plate and is rotatably connected to the connecting block through the third bearing. A circular groove is provided on the inner wall of the connecting block, and a third limiting ring is provided in the circular groove, and the third limiting ring is clamped with the circular groove.

[0017] Further technical solution: A transmission shield is sleeved on the outer wall of the gear fixing plate, a step is provided on the gear fixing plate, and the transmission shield is connected in cooperation with the step.

[0018] Advantages of the present invention:

[0019] When the operator of the present invention fine-tunes the folding shaft through the adjustment mechanism, due to the change in paper thickness usually within the range of millimeters or even smaller, the rotation amplitude of the adjustment mechanism driving the folding shaft is too small, and the coupling is made of a soft material, the coupling has good flexibility and deformation ability, and can also bear a certain transmission torque. Therefore, the arc of the adjustment mechanism driving the folding shaft to rotate can be ignored, that is, the adjustment mechanism drives the folding shaft to slide along the direction perpendicular to the central axis of the first outer retaining ring and the hole wall of the hole position; and when the adjustment mechanism adjusts the folding shaft, the position of the inner retaining ring remains unchanged, then the position of the second outer retaining ring remains unchanged, and the tooth pitch of the gear remains unchanged;

[0020] Moreover, the coupling separates the small displacement of the folding shaft from the rigid transmission of the gear, not only realizes the flexible adjustment of the position of the folding shaft to adapt to papers of different thicknesses, but also ensures the high-precision synchronous operation of the gear, greatly improves the folding quality, production efficiency of the folding machine and the adaptability to diverse paper specifications, and at the same time effectively reduces the risk of mechanical wear or failure of the gear caused by tooth pitch changes;

[0021] In addition, when the adjusting structure moves along the folding shaft, the moving direction is defined as the direction perpendicular to the central axis of the outer snap ring 1 and the sliding direction along the hole wall of the hole position. Therefore, in this embodiment, the sizes of the gears are the same. That is, when the gear connected to the driving shaft rotates one circle, the other gears also rotate one circle. After folding a batch of paper with a certain thickness, the operator can first reset the gear connected to the driving shaft, and then the other gears will be driven to reset, which is convenient for the operator to adjust the position of the folding shaft according to the thickness of the next batch of paper by using the adjusting mechanism again.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0023] Figure 1 : The overall structure of the present invention Figure 1 .

[0024] Figure 2 : Partial structure diagram of the present invention after hiding the transmission shield.

[0025] Figure 3 : Partial structure of the present invention after hiding the transmission shield and the gear fixing plate Figure 1 .

[0026] Figure 4 : Of the present invention Figure 3 Enlarged view of part A.

[0027] Figure 5 : Exploded view of the present invention.

[0028] Figure 6 : Partial structure of the present invention after hiding the transmission shield and the gear fixing plate Figure 2 .

[0029] Figure 7 : Of the present invention Figure 6 Enlarged view of part B.

[0030] Figure 8 : Side view of the present invention after hiding the transmission shield and the gear fixing plate.

[0031] Figure 9 : Structural schematic of the coupling of the present invention Figure 1 .

[0032] Figure 10 : Exploded view of the coupling of the present invention.

[0033] Figure 11 : Structural schematic of the coupling of the present invention Figure 2 .

[0034] Figure 12 : Schematic diagram of the moving direction of the coupling of the present invention.

[0035] Figure 13 : The overall structure of the present invention Figure 2 。

[0036] Figure 14 : Partial structural diagram of the present invention after hiding the protective cover.

[0037] Figure 15 : Exploded view of the present invention after hiding the protective cover.

[0038] Figure 16 : The Figure 15 Enlarged view of part C of the present invention.

[0039] Figure 17 : Schematic diagram of the folding shaft of the present invention and the adjusting mechanisms at both ends, the coupling and the gear.

[0040] Figure 18 : Structural diagram of side plate 1 of the present invention.

[0041] Reference numerals: 1, frame; 2, folding shaft; 3, adjusting hole; 4, side plate 1; 5, coupling; 511, outer snap ring 1; 512, inner snap ring; 513, outer snap ring 2; 514, sliding part; 515, hole position; 6, gear fixing plate; 7, fixing column; 8, gear; 10, avoiding hole; 11, adjusting assembly; 111, fixing block; 112, moving rod; 113, driving component; 1131, support block; 1132, rotating rod; 1133, operating ring; 1134, dial; 1135, adapting plate; 114, resetting component; 1141, reset spring; 1142, reset column; 1143, protruding column; 12, bearing 1; 13, connecting block; 14, rotating shaft; 15, bearing 2; 16, limiting ring 1; 17, annular protrusion; 18, rotating bolt; 19, transmission protective cover; 20, limiting ring 2; 21, side plate 2; 22, circular groove; 23, limiting ring 3; 24, protective cover Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] Please refer to Figures 1 - 18 ;

[0044] An origami machine coupling structure with a constant tooth pitch can be applied to "a folding machine" disclosed in the reference document "CN109019131A". Specifically, it includes a frame 1, with a first side plate 4 and a second side plate 21 arranged on both sides of the frame. The frame 1 is provided with a number of folding shafts 2, and the number of folding shafts 2 is located between the first side plate 4 and the second side plate 21. The number of folding shafts 2 can be determined according to the number of times the paper needs to be folded, and the position where the folding shafts 2 are placed can be determined according to the folding shape required by the product. In this embodiment, the number and position of the folding shafts 2 are not limited. One of the folding shafts 2 is a driving shaft and is driven by a driving device. Commonly used driving devices include driving motors. Adjusting holes 3 for the folding shafts 2 to pass through are provided on both the first side plate 4 and the second side plate 21 of the frame 1. In this embodiment, the adjusting hole 3 is composed of a number of semi-circular holes, and there is a gap for the position change of the folding shaft 2 between the hole wall of the semi-circular hole and the folding shaft 2. Both ends of each folding shaft 2 are rotatably connected with adjusting mechanisms, and the two adjusting mechanisms are respectively installed on the first side plate 4 and the second side plate 21. That is, the operator can rotate and adjust the folding shaft 2 through the adjusting mechanism, and after the adjusting mechanism adjusts the position of the folding shaft 2, the folding shaft 2 can still rotate relative to the adjusting mechanism. A gear fixing plate 6 and a number of gears 8 are sequentially arranged on the side of the first side plate 4 away from the folding shaft 2. The gear fixing plate 6 can be fixedly connected to the frame 1 or the first side plate 4. In this embodiment, the gear fixing plate 6 is fixedly connected to the first side plate 4 through a fixing column 7. The gear fixing plate 6 is rotatably connected with the gears 8. The sizes of the number of gears 8 are the same, and the number of gears 8 mesh with each other;

[0045] A number of couplings 5 are arranged between the gear fixing plate 6 and the first side plate 4. The gear 8 is connected to the folding shaft 2 through the coupling 5. The coupling 5 includes an outer snap ring 511 and a snap ring. The outer snap ring is connected to the folding shaft, and the snap ring is connected to the gear 8. Two hole positions 515 are provided on one side of the snap ring. Two sliding parts 514 are respectively slidably connected to the two hole positions. The two sliding parts are fixedly arranged on one side of the outer snap ring 511. The two sliding parts 514 are located on both sides of the diameter of the outer snap ring 511, so that the sliding parts 514 can move in the same direction at the same time. When the adjusting mechanism adjusts the distance between a number of folding shafts, the outer snap ring and the snap ring slide relative to each other, so that the tooth pitches of a number of gears are kept constant; More specifically, the snap ring includes an inner snap ring 512 and an outer snap ring 513. The outer snap ring 513 is also provided with two sliding parts 514 facing the inner snap ring 512. The inner snap ring 512 is also provided with two hole positions 515 facing the outer snap ring. The sliding parts 514 and the hole positions 515 can be inserted and matched. A gap for the sliding parts 514 to slide is provided between the sliding parts 514 and the inner hole wall of the hole positions 515. That is to say, in the initial state, the sliding parts 514 are inserted into the hole positions 515, there is no gap between the outer sides of the sliding parts 514 and the inner snap ring 512, and there is a gap between the inner sides of the sliding parts 514 and the inner hole wall of the hole positions 515. When the sliding parts 514 of the outer snap ring 511 move along the hole wall of the hole positions 515, one of the sliding parts 514 slides towards the inner hole wall of the hole positions 515, and the other sliding part 514 slides away from the inner hole wall of the hole positions 515. At this time, the position of the inner snap ring 512 remains unchanged; During the movement process, the sliding part 514 sliding towards the inner hole wall of the hole positions 515 slides farthest until it abuts against the inner hole wall. At this time, the other sliding part 514 still contacts the hole wall of the hole positions. At this time, the outer side of the sliding part 514 sliding towards the inner hole wall of the hole positions is recessed relative to the inner snap ring 512, and the outer side of the other sliding part 514 protrudes relative to the inner snap ring 512. During the movement process, the position of the inner snap ring remains unchanged;

[0046] In this embodiment, the outer snap ring 511 is fixedly connected to the folding shaft 2 coaxially. The adjusting mechanism can drive the sliding part 514 of the outer snap ring 511 to move along the hole wall of the hole position 515. The adjusting mechanism can change the position of the folding shaft 2 according to the thickness of the paper. Specifically, the adjusting mechanism can drive the folding shaft 2 to rotate. However, since the change in the position of the folding shaft 2 varies according to the thickness of the paper, and the change in the thickness of the paper is tiny, the change in the position of the folding shaft 2 is a tiny change. In fact, in this embodiment, since the rotation amplitude of the folding shaft 2 driven by the adjusting mechanism is too small, and the coupling 5 is made of a soft material, the coupling 5 has good flexibility and deformation ability and can withstand a certain transmission torque at the same time. Therefore, the radian of the rotation of the folding shaft 2 driven by the adjusting mechanism can be ignored, that is, the adjusting mechanism drives the folding shaft 2 to slide along the direction perpendicular to the central axis of the outer snap ring 511 and the hole wall of the hole position 515; in this embodiment, the outer snap ring 2 is fixedly connected to the gear 8 coaxially. In addition, since it is a key part to keep the position of the inner snap ring 512 unchanged when the adjusting mechanism adjusts the folding shaft 2, therefore, in order to further keep the position of the inner snap ring 512 unchanged, one end of the outer snap ring 2 is inserted into the inner snap ring, and the other end is fixedly connected to the gear 8 coaxially. Even if the inner snap ring is offset relative to the outer snap ring 513, as long as the position of the outer snap ring 513 is kept unchanged, the tooth pitch of the gear 8 can still be kept unchanged.

[0047] Specifically, in the initial state, the paper folding process starts from when the paper enters the paper folding machine. The paper is smoothly fed into the folding area through the paper feeding mechanism, usually guided by a pair of paper guide rollers or conveyor belts to ensure that the paper enters between the folding shafts 2 at the correct angle and speed. In this embodiment, the surface of the folding shaft 2 is engraved with fine lines to increase the friction with the paper and prevent slipping; the driving shaft starts to rotate under the drive of the driving motor, and its rotation speed and direction are transmitted to other folding shafts 2 through the coupling 5 and the gear to ensure that all folding shafts 2 rotate synchronously at the same speed and in the same direction; in this embodiment, the constant tooth pitch of the gear 8 maintains the stability of the folding action.

[0048] When it is necessary to adjust the distance between the folding shafts 2 according to the paper thickness, the operator makes fine adjustments to the folding shafts 2 through the adjusting mechanism. Since the change in the paper thickness is usually in the range of millimeters or even smaller, the rotation amplitude of the folding shaft 2 driven by the adjusting mechanism is too small, and the coupling 5 is made of a soft material, the coupling 5 has good flexibility and deformation ability and can withstand a certain transmission torque at the same time. Therefore, the radian of the rotation of the folding shaft 2 driven by the adjusting mechanism can be ignored, that is, the adjusting mechanism drives the folding shaft 2 to slide along the direction perpendicular to the central axis of the outer snap ring 511 and the hole wall of the hole position 515, that is Figure 12The moving direction in it; and when the adjusting mechanism adjusts the folding shaft 2, the position of the inner snap ring 512 remains unchanged, then the position of the second outer snap ring 513 remains unchanged, and the pitch of the gear 8 remains unchanged;

[0049] Compared with the traditional folding machine design, in the traditional structure, the gear 8 is usually directly fixed coaxially with the folding shaft 2, for example, connected by a keyway or a tight fit method; when the folding shaft 2 needs to move, the center distance or angle between the gears 8 will change accordingly, resulting in the pitch deviating from the design value, which will affect the folding accuracy at worst, and at worst, it will cause poor meshing of the gears 8, increased noise or even mechanical jamming; while in this embodiment, the coupling separates the small displacement of the folding shaft 2 from the rigid transmission of the gears, not only realizing the flexible adjustment of the position of the folding shaft 2 to adapt to papers of different thicknesses, but also ensuring the high-precision synchronous operation of the gears 8, greatly improving the folding quality, production efficiency of the folding machine and the adaptability to diverse paper specifications, and at the same time effectively reducing the risk of mechanical wear or failure of the gears 8 caused by pitch changes;

[0050] In addition, when the adjusting structure 11 moves the folding shaft 2, the moving direction is limited to the direction perpendicular to the central axis of the first outer snap ring 511 and the direction of sliding movement along the hole wall of the hole 515. Therefore, in this embodiment, the gears 8 are of the same size, that is, when the gear 8 connected to the driving shaft rotates one circle, the other gears 8 also rotate one circle. After folding a batch of papers of a certain thickness, the operator can first reset the gear 8 connected to the driving shaft, and then the other gears 8 are driven to reset, which is convenient for the operator to adjust the position of the folding shaft 2 according to the thickness of the next batch of papers by using the adjusting mechanism.

[0051] In this embodiment, the gear 8 is fixedly provided with a rotating shaft 14. The rotating shaft 14 passes through the avoidance hole 10 of the gear fixing plate 6, and the rotating shaft 14 is rotatably connected to the hole wall of the avoidance hole 10 through a second bearing 15. One end of the rotating shaft 14 is coaxially and fixedly connected to the gear 8, and the other end of the rotating shaft 14 is coaxially and fixedly connected to the second outer snap ring 513; further, the number of the second bearings 15 on the rotating shaft 14 is two. A first limiting ring 16 is arranged between the two second bearings 15. The first limiting ring 16 is sleeved on the rotating shaft 14. Ring-shaped protrusions 17 are arranged at both ends of the rotating shaft 14. There is a space between the first limiting ring 16 and the ring-shaped protrusions 17, and the second bearing 15 is sleeved in this space of the rotating shaft 14 to maintain the stability of the second bearing 15.

[0052] Specifically, during the rotation process, when the driving shaft starts to rotate, it first drives the coupling 5 connected thereto to rotate. The coupling 5 rotates accordingly and transmits power to the rotating shaft 14 connected thereto. Since one end of the rotating shaft 14 is fixedly connected to the gear 8 coaxially, the rotation of the rotating shaft 14 will directly drive the gear 81 connected thereto to rotate. And several gears 8 in the gear 8 remain in a meshing state. Therefore, the rotation of this gear 8 will further drive other meshing gears 8 to rotate. The rotation of other gears 8 transmits power through their respective rotating shafts 14. The other ends of these rotating shafts 14 are fixedly connected to the outer snap ring two 513 coaxially, thereby driving other couplings 5 to continue to rotate, forming a continuous transmission chain. The constant pitch and stable meshing between the gears 8 ensure the high precision and synchronism of the transmission. The rotational connection between the rotating shaft 14 and the avoidance hole 10 through the bearing two 15 reduces the frictional resistance and improves the running stability. And the two bearings two 15 are clamped in the limiting space formed by the limiting ring one 16 and the annular protrusion 17, which effectively maintains the axial stability of the bearing two 15 and prevents the rotating shaft 14 from shifting or wearing during high-speed operation or under force, thereby enhancing the durability of the gear 8 and the reliability of the transmission system.

[0053] In this embodiment, the adjusting mechanism includes a plurality of adjusting components 11. The adjusting component 11 includes a fixed block 111, a moving rod 112, a connecting block 13, a driving component 113 and a reset component 114. The fixed block 111 is fixedly connected to the side plate one 4. The moving rod 112 passes through the fixed block 111, and the moving rod 112 slides relative to the fixed block 111. One end of the moving rod 112 is fixedly connected to the connecting block 13. The driving component 113 is used to drive the moving rod 112 to move, and the driving component 113 can also limit the position of the moving rod 112. The reset component 114 is used to reset the moving rod 112. The connecting block 13 can drive the hinge shaft 2 to move. Further, one end of the hinge shaft 2 passing through the side plate one 4 is movably connected to the connecting block through the bearing one 12. The outer wall of the bearing one 12 is fixedly connected to the inner wall of the connecting block 13. The connecting block 13 is rotatably connected to the side plate one 4. A rotating bolt is provided on the connecting block 13. The connecting block 13 is rotatably connected to the side plate one 4 through the rotating bolt.

[0054] In the initial state, the folding shaft 2 rotates normally to drive the paper folding. When it is necessary to change the thickness of the folded paper, first stop the operation of the folding machine. At this time, the folding shaft 2 stops rotating. First, reset the gear 8. Then, the operator adjusts the position of the folding shaft 2 through the adjusting mechanism. Specifically, the driving component 113 is started, and the driving rod 112 slides along the fixed block 111. Since one end of the driving rod 112 is fixedly connected to the connecting block 13, the movement of the driving rod 112 will drive the connecting block 13 to rotate around the rotating bolt 18, thereby driving the connected folding shaft 2 to move synchronously. After adjusting to the required position, the driving component 113 restricts the position of the driving rod 112 to fix the new position of the folding shaft 2. At this time, turn on the paper folding machine to work; when the folding of the paper with this thickness is completed, turn off the paper folding machine, and use the reset component 114 to drive the driving rod 112 to return to its original position, so that the folding shaft 2 returns to its original position; when folding paper with other thicknesses is required, make secondary adjustments. After the adjustment is completed, restart the folding machine, and the folding shaft 2 resumes rotation to drive the paper to be folded according to the new thickness requirements; the efficient and precise adjustment of the position of the folding shaft 2 is realized, and the reset component 114 increases the flexibility of the operation.

[0055] In this embodiment, a second limiting ring 20 is provided on the outer snap ring 511 of the coupling 5. The second limiting ring 20 is sleeved on the folding shaft 2, and the second limiting ring 20 is located between the first bearing 12 and the coupling 5 to improve the stability of the first bearing 12 and the coupling 5.

[0056] Furthermore, the driving component 113 includes a support block 1131. A through groove is formed in the support block 1131. One end of the driving rod 112 passes through the through groove. The inner wall of the through groove is provided with internal threads. The support block 1131 is provided with a rotating rod 1132. The part of the rotating rod 1132 extending into the through groove is threadedly connected to the inner wall of the through groove. A operating ring 1133 is fixedly provided at the end of the rotating rod 1132 away from the support block 1131, which is convenient for the operator to rotate the rotating rod 1132 through the operating ring 1133. One end of the rotating rod 1132 contacts the driving rod 112, and the rotation of the rotating rod 1132 can drive the driving rod 112 to move.

[0057] Specifically, when adjusting the position of the folding shaft 2 to adapt to different paper thicknesses, the operator adjusts by rotating the rotating rod 1132 in the driving component 113. The specific process is as follows: the operator holds the operating ring 1133 and rotates the rotating rod 1132. Since the part of the rotating rod 1132 extending into the through groove is threadedly connected to the inner thread of the through groove wall, the rotating rod 1132 moves axially along the through groove when rotating. One end of it contacts the driving rod 112 and pushes the driving rod 112 to slide in the fixed block 111. Since the driving rod 112 is fixedly connected to the connecting block 13, the movement of the driving rod 112 drives the connecting block 13 and the folding shaft 2 to be synchronously adjusted to the required position. After the adjustment is completed, the rotating rod 1132 fixes its position through thread self-locking to restrict the movement of the driving rod 112.

[0058] Further, the moving rod 112 is provided with a paddle 1134. The paddle 1134 is provided with a rod-passing hole. The moving rod 112 passes through the rod-passing hole of the paddle 1134, and the moving rod 112 is fixedly connected to the hole wall of the rod-passing hole. The other end of the paddle 1134 is inclined upward, which is convenient for the operator to press. The paddle 1134 can drive the moving rod 112 to move. The paddle 1134 is provided with a plurality of adaptor plates 1135, and the plurality of adaptor plates 1135 can be selected according to the paper thickness. The adaptor plates 1135 are clamped between the paddle 1134 and the support block 1131.

[0059] When the operator needs to adjust the position of the folding shaft 2, press the upwardly inclined end of the paddle 1134. Since the paddle 1134 is fixedly connected to the moving rod 112 through the rod-passing hole, when the paddle 1134 is pressed, the paddle 1134 drives the moving rod 112 to slide along the fixed block 111, and then drives the folding shaft 2 to synchronously adjust the position through the connecting block 13. After adjusting to the target position, select a suitable adaptor plate 1135 according to the required paper thickness and clamp it between the paddle 1134 and the support block 1131. The adaptor plate 1135 is clamped between the paddle 1134 and the support block 1131 to limit the position of the paddle 1134, and then limit the position of the moving rod 112 to ensure the stability of the folding shaft 2. The inclined design of the paddle 1134 facilitates the operator to apply force. The fixed connection of the rod-passing hole ensures the accuracy of the movement of the moving rod 112, and the selection mechanism of the plurality of adaptor plates 1135 provides the flexibility of thickness adjustment, thereby improving the adaptability of the device to various paper thicknesses and the reliability of the folding accuracy.

[0060] It should be noted that both the method of pressing the paddle 1134 and the method of rotating the rotating rod 1132 are ways to adjust the position of the folding shaft 2, and the operator can select according to needs.

[0061] Regardless of which adjustment method the operator chooses, when resetting is required, the reset component 114 needs to be used. The reset component 114 includes a reset spring 1141 and a reset post 1142. The reset post 1142 is fixedly installed on the first side plate 4. One end of the reset spring 1141 is fixedly connected to the reset post 1142, and the other end of the reset spring 1141 is connected to the connecting block 13. Specifically, a protruding post 1143 is provided on the connecting block 13, and the reset spring 1141 is hung on the protruding post 1143.

[0062] During resetting, the operator releases the control of the paddle 1134 or the rotating rod 1132. At this time, the elastic force of the reset spring 1141 acts on the protruding column 1143, pulling the connecting block 13 back along the direction of the fixed block 111. Since the connecting block 13 is fixedly connected to the moving rod 112, the movement of the connecting block 13 drives the moving rod 112 and the folding shaft 2 to be reset to the initial position synchronously. After the reset is completed, the tension of the reset spring 1141 keeps the connecting block 13 stable; the cooperation of the reset spring 1141 and the reset column 1142 realizes the automatic reset of the connecting block 13. The structure is simple and the reset process is efficient, which ensures that the folding shaft 2 quickly returns to its initial state, thereby improving the convenience and work efficiency of equipment operation.

[0063] In this embodiment, a transmission shield 19 is sleeved on the outer wall of the gear fixing plate 6, and a circle of steps is provided on the outer wall of the gear fixing plate 6. The transmission shield 19 can cooperate with the steps. The use of the transmission shield 19 can effectively prevent dust, paper scraps or other foreign matter from entering the gear 8, and avoid wear or jamming of the gear 8 due to accumulation of impurities, thereby extending the service life of the gear 8; the transmission shield 19 provides a physical barrier for the gear 8, reduces damage to the gear 8 caused by external impact or accidental contact, and improves the overall safety and stability of the equipment. The transmission shield 19 can also reduce the noise generated when the gear 8 is running, and improve the comfort of the working environment; by isolating the gear 8 from the external environment, the transmission shield 19 helps prevent leakage of lubricating oil and keep the transmission system clean and efficient.

[0064] In this embodiment, the folding shaft 2 passes through the side plate 21 and is rotatably connected to the connecting block 13 through the bearing 3. A circular groove 22 is provided on the inner wall of the connecting block 13. A limiting ring 3 23 is provided in the circular groove 22. The limiting ring 3 23 is clamped with the circular groove 22. A protective cover 24 is provided on the side plate 21.

[0065] According to the paper thickness requirement, the operator first adjusts the connecting block 13 on the side panel 1 4 to the target position through the adjusting mechanism, and then adjusts the adjusting mechanism in the side panel 21 accordingly, so that the two ends of the folding shaft 2 move synchronously and keep the folding shaft 2 set horizontally; a limiting ring 3 23 is provided in the circular groove 22 on the inner wall of the connecting block 13, and the limiting ring 3 23 is tightly engaged with the circular groove 22 to ensure that the folding shaft 2 remains stable during the movement and avoids axial deviation or shaking.

[0066] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0067] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A paper folding machine coupling structure with a constant tooth pitch, characterized in that: The invention comprises a frame (1) and a plurality of folding shafts (2) located between a first side plate (4) and a second side plate (21) of the frame (1); the first side plate (4) and the second side plate (21) of the frame (1) are both provided with adjustment holes (3) for the folding shafts (2) to pass through; both ends of each folding shaft are rotatably connected with an adjustment mechanism, and the two adjustment mechanisms are respectively installed on the first side plate (4) and the second side plate (21); a gear fixing plate (6) is arranged on a side of the first side plate (4) away from the folding shaft (2); a plurality of gears of the same size are rotatably connected to the gear fixing plate (6), and the plurality of gears are meshed with each other, and the gears are connected to the folding shafts via a coupling; The coupling (5) comprises an outer clamping ring (511) and a clamping ring. The outer clamping ring (511) is connected to the folding shaft, and the clamping ring is connected to the gear. One side of the clamping ring is provided with two holes (515). The two holes are respectively slidably connected with two sliding parts (514). The two sliding parts are fixedly arranged on one side of the outer clamping ring (511). When the adjustment mechanism adjusts the distance between the plurality of folding shafts, the outer clamping ring and the clamping ring slide relative to each other, so that the tooth pitch of the plurality of gears remains constant.

2. A paper folding machine coupling structure with a constant tooth pitch according to claim 1, characterized in that: The gear (8) is provided with a rotating shaft (14), the rotating shaft (14) passes through the avoidance hole (10) of the gear fixing plate (6), and the rotating shaft (14) is rotatably connected to the hole wall of the avoidance hole (10) via a second bearing (15), one end of the rotating shaft (14) is coaxially fixedly connected to the gear (8), and the other end of the rotating shaft (14) is coaxially fixedly connected to the second outer clamping ring (513).

3. The paper folding machine coupling structure with a constant tooth pitch according to claim 2, characterized in that: The number of bearings 2 (15) on the rotating shaft (14) is two, a limiting ring 1 (16) is arranged between the two bearings 2 (15), the limiting ring 1 (16) is sleeved on the rotating shaft (14), both ends of the rotating shaft (14) are provided with annular protrusions (17), a space is arranged between the limiting ring 1 (16) and the annular protrusion (17), and the bearing 2 (15) is sleeved on the space of the rotating shaft (14).

4. The paper folding machine coupling structure with a constant tooth pitch according to claim 2, characterized in that: The adjustment mechanism comprises a plurality of adjustment components (11), wherein the adjustment components (11) comprise a fixed block (111), a moving rod (112), a connecting block (13), a driving component (113) and a resetting component (114); the fixed block (111) is fixedly connected to the side plate (4); the moving rod (112) passes through the fixed block (111), and the moving rod (112) is slidably connected to the fixed block (111); one end of the moving rod (112) is fixedly connected to the connecting block (13); the driving component (113) is used to drive the moving rod (112) to move, and the driving component (113) can also limit the position of the moving rod (112); the resetting component (114) is used to reset the moving rod (112); and the connecting block (13) can drive the folding shaft (2) to move.

5. The paper folding machine coupling structure with a constant tooth pitch according to claim 4, characterized in that: One end of the folding shaft (2) passing through the side plate 1 (4) is movably connected to the connecting block (13) through a bearing 1 (12); the outer wall of the bearing 1 (12) is fixedly connected to the inner wall of the connecting block (13); a rotating bolt (18) is provided on the connecting block (13); the connecting block (13) is rotatably connected to the side plate 1 (4) through the rotating bolt (18); an outer clamping ring 1 (511) of the coupling (5) is provided with a limiting ring 2 (20); the limiting ring 2 (20) is sleeved on the folding shaft (2); the limiting ring 2 (20) is located between the bearing 1 (12) and the coupling (5).

6. The paper folding machine coupling structure with a constant tooth pitch according to claim 4, characterized in that: The driving component (113) comprises a supporting block (1131), a through slot is provided in the supporting block (1131), one end of the moving rod (112) passes through the through slot, the slot wall of the through slot is provided with an internal thread, the supporting block (1131) is provided with a rotating rod (1132), the rotating rod (1132) is threadedly connected to the slot wall of the through slot, one end of the rotating rod (1132) is in contact with the moving rod (112), and the rotating rod (1132) can drive the moving rod (112) to move when it rotates.

7. The paper folding machine coupling structure with a constant tooth pitch according to claim 6, characterized in that: The moving rod (112) is provided with a paddle (1134), the paddle (1134) is provided with a rod penetration hole, the moving rod (112) passes through the rod penetration hole of the paddle (1134), the moving rod (112) is fixedly connected to the hole wall of the rod penetration hole, the paddle (1134) can drive the moving rod (112) to move, the paddle (1134) is provided with a plurality of adaptation plates (1135), a plurality of the adaptation plates (1135) can be selected according to the thickness of the paper, and the adaptation plates (1135) are clamped between the paddle (1134) and the support block (1131).

8. The paper folding machine coupling structure with a constant tooth pitch according to claim 4, characterized in that: The reset component (114) comprises a reset spring (1141) and a reset column (1142); the reset column (1142) is mounted on the side plate; one end of the reset spring (1141) is connected to the reset column (1142); and the other end of the reset spring (1141) is connected to the connection block (13).

9. The paper folding machine coupling structure with a constant tooth pitch according to claim 4, characterized in that: The folding shaft (2) passes through the second side plate (21) and is rotatably connected to the connecting block (13) via a third bearing; a circular groove (22) is provided on the inner wall of the connecting block (13); a limiting ring (23) is provided in the circular groove (22); and the limiting ring (23) is clamped with the circular groove (22).

10. The paper folding machine coupling structure with a constant tooth pitch according to claim 1, characterized in that: The outer wall of the gear fixing plate (6) is sleeved with a transmission shield (19), the gear fixing plate (6) is provided with a step, and the transmission shield (19) is matched and connected with the step.

Images