Shifting fork transmission mechanism of folding machine

Abstract

The utility model discloses a shifting fork transmission mechanism of a folding machine, and relates to the technical field of folding machinery. A set of crank connecting rod assembly is added in an existing shifting fork transmission mechanism, transmission from rotating power of the folding roller to swinging of the shifting fork shaft is achieved through the two sets of crank connecting rod assemblies, and the angular speed of an eccentric plate II in the second set of crank connecting rod assembly is changed in a variable-speed mode through the newly-added set of crank connecting rod assembly. The shifting fork stays for a short time when reaching the lowest paper shifting position, paper materials on a paper stack can be pressed, and products are kept in order.

Description

Technical Field

[0001] This utility model relates to the field of folding machinery technology, and more specifically to the shift fork transmission mechanism of a folding machine. Background Technology

[0002] A folding machine is a device that folds tissue paper, non-woven fabric, and other materials layer by layer to form a pull-out finished product. The folding machine folds the input paper or non-woven fabric together through a folding roller assembly. A shift fork assembly works with the folding roller assembly to peel the paper or non-woven fabric off the folding rollers, allowing the falling paper to be folded together.

[0003] In existing folding machines, the power source for the reciprocating peeling of paper by the shift fork is the same as the power source for the folding roller. Generally, the transmission is carried out through the folding roller. That is, a gear set is set at the end of the folding roller, which drives the crank-connecting rod assembly, and the crank-connecting rod assembly drives the shift fork shaft to rotate reciprocally.

[0004] For example, the utility model patent with the authorization announcement date of August 31, 2021, authorization announcement number CN214087037U, and title "A Novel Folding Machine Transmission Mechanism" uses a drive gear at the end of the drive roller and a first driven gear to form a gear transmission pair. The first driven gear drives the two flipping shafts of the folding mechanism to rotate alternately forward or backward through a crank rocker, thereby enabling the fork to fold the paper.

[0005] The existing folding machine's fork transmission mechanism causes the fork to immediately reverse and lift up when it reaches the lowest position of the paper stack. The time the fork stays at the lowest position of the paper stack is extremely short, which makes it impossible to effectively press down on the top of the paper stack, resulting in poor folding of the paper stack. Utility Model Content

[0006] To overcome the defects and shortcomings of the existing technology, this utility model provides a shift fork transmission mechanism for a folding mechanism. The purpose of this invention is to solve the problem that the shift fork cannot effectively press down on the top of the paper stack, resulting in poor folding neatness of the paper stack. This utility model adds a crank-connecting rod assembly to the existing shift fork transmission mechanism. The transmission of the folding roller rotation power to the shift fork shaft is achieved through two sets of crank-connecting rod assemblies. The newly added crank-connecting rod assembly causes the angular velocity of the eccentric plate II in the second crank-connecting rod assembly to change, so that the shift fork pauses briefly when it reaches the lowest position of the paper stack, which can press down the paper on the paper stack and keep the product neat.

[0007] To address the problems existing in the prior art, the present invention is achieved through the following technical solution.

[0008] This utility model provides a shift fork transmission mechanism for a folding machine, including a driven gear, an eccentric plate I, a connecting rod, an eccentric plate II, a support shaft, an eccentric shaft, a rocker arm, a transmission arm, and a shift fork flipping shaft. The eccentric plate I is coaxially assembled with the driven gear, and the eccentric plate II is coaxially assembled with the support shaft. The rotation axis of the eccentric plate I is parallel to and non-collinear with the rotation axis of the eccentric plate II. One end of the connecting rod is hinged to a non-rotation axis portion of the eccentric plate I, and the other end of the connecting rod is hinged to a non-rotation axis portion of the eccentric plate II. The eccentric shaft is assembled on the support shaft, and the axis of the eccentric shaft is parallel to and non-collinear with the axis of the support shaft. One end of the rocker arm is assembled on the eccentric shaft via a bearing, and the other end of the rocker arm is hinged to one end of the transmission arm. The other end of the transmission arm is fixedly connected to the shift fork flipping shaft.

[0009] More preferably, the driven gear is mounted on the frame of the folding machine via a gear mounting sleeve, and the driven gear is rotatably mounted in the gear mounting sleeve; the gear mounting sleeve is provided with an opening, through which the driven gear meshes with the driving gear at the end of the folding roller in the folding machine.

[0010] More preferably, the support shaft is mounted on the frame of the folding machine by a support bearing seat.

[0011] More preferably, the support bearing seat includes a fixed plate, a connecting plate, and a support plate. The fixed plate is used for fixed assembly with the folding machine frame. The connecting plate is perpendicular to the fixed plate and fixedly connected to the fixed plate. The support plate is perpendicular to the connecting plate and fixedly connected to the connecting plate. The support plate is provided with a bearing for assembling the support shaft.

[0012] More preferably, a reinforcing rib is provided between the bottom of the connecting plate and the fixing plate.

[0013] More preferably, the end of the transmission arm is sleeved on the shift fork flipping shaft and positioned and fixed by a pin.

[0014] More preferably, the other end of the transmission arm is provided with a pin I, and the end of the rocker arm that is hinged to the transmission arm is sleeved on the pin.

[0015] More preferably, the transmission arm is provided with a buffer spring.

[0016] In a further preferred embodiment, a pin II is provided on the non-rotational axis portion of the eccentric plate I, and a pin III is provided on the non-rotational axis portion of the eccentric plate II. One end of the connecting rod is sleeved on the pin II, and the other end of the connecting rod is sleeved on the pin III.

[0017] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0018] 1. Compared with the prior art, this utility model adds a crank-connecting rod assembly (composed of eccentric plate I and connecting rod) to the existing shift fork transmission mechanism; the rotation of the driven gear is transmitted to another crank-connecting rod assembly (composed of eccentric plate II, support shaft, eccentric shaft, rocker arm and transmission arm) through the newly added crank-connecting rod assembly; this transmission method causes the angular velocity of eccentric plate II to change, presenting a change curve that is approximately a sine curve, and there will be a brief pause at low speed, so that the shift fork will pause briefly when it reaches the lowest position of paper shifting, which can press down the paper on the paper stack and keep the product neat.

[0019] 2. The shift fork transmission mechanism of this utility model can effectively ensure the neatness of several sheets on the paper stack. By changing the speed, it can also effectively stagger the shift fork and the bottom knife on the folding roller, thus increasing the size and thickness of the shift fork and enhancing its strength. Moreover, it has obvious effects whether applied to folding rollers with three bottom knives or four or more bottom knives. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the power transmission structure of the shift fork transmission mechanism of this utility model;

[0021] Figure 2 This is a schematic diagram of the assembly structure of the shift fork transmission mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the rotation trajectory of eccentric plate I and eccentric plate II in the shift fork transmission mechanism of this utility model;

[0023] Figure 4 This is a graph showing the angular velocity variation of the eccentric plate II in the shift fork transmission mechanism of this utility model.

[0024] Figure 5 This is an exploded view of the shift fork transmission mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the fork movement in the fork transmission mechanism of this utility model;

[0026] Reference numerals: 1. Driven gear, 2. Eccentric plate I, 3. Connecting rod, 4. Eccentric plate II, 5. Support shaft, 6. Eccentric shaft, 7. Rocker arm, 8. Transmission arm, 9. Fork flipping shaft, 10. Folding roller, 11. Drive gear, 12. Fork, 13. Paper stack, 14. Gear mounting sleeve, 15. Opening, 16. Support bearing seat, 17. Fixing plate, 18. Connecting plate, 19. Support plate, 20. Reinforcing rib plate, 21. Pin I, 22. Pin II, 23. Pin III, 24. Buffer spring. Detailed Implementation

[0027] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example 1

[0029] As a preferred embodiment of this utility model, this embodiment provides a shift fork transmission mechanism for a folding machine, as described in the appendix to the specification. Figure 1 As shown, similar to existing technologies, the reciprocating motion of the shift fork 12 is powered by the folding roller 10, which drives the driven gear 1 to rotate through the meshing of the driving gear 11 at the end of the folding roller 10 with the driven gear 1. The difference from existing technologies is that this embodiment drives the shift fork flipping shaft 9 to reciprocate through the transmission of the eccentric plate I2, connecting rod 3, eccentric plate II4, support shaft 5, eccentric shaft 6, rocker arm 7, and transmission arm 8.

[0030] Refer to the instruction manual appendix Figure 2 As shown, the transmission mechanism of the shift fork 12 of the folding machine in this embodiment includes a driven gear 1, an eccentric plate I 2, a connecting rod 3, an eccentric plate II 4, a support shaft 5, an eccentric shaft 6, a rocker arm 7, a transmission arm 8, and a shift fork flipping shaft 9. The eccentric plate I 2 is coaxially assembled with the driven gear 1, and the eccentric plate II 4 is coaxially assembled with the support shaft 5. The rotation axis of the eccentric plate I 2 is parallel to and not collinear with the rotation axis of the eccentric plate II 4. One end of the connecting rod 3 is hinged to the non-rotation axis portion of the eccentric plate I 2, and the other end of the connecting rod 3 is hinged to the non-rotation axis portion of the eccentric plate II 4. The eccentric shaft 6 is assembled on the support shaft 5, and the axis of the eccentric shaft 6 is parallel to and not collinear with the axis of the support shaft 5. One end of the rocker arm 7 is assembled on the eccentric shaft 6 via a bearing, and the other end of the rocker arm 7 is hinged to one end of the transmission arm 8. The other end of the transmission arm 8 is fixedly connected to the shift fork flipping shaft 9.

[0031] Refer to the instruction manual appendix Figure 3 As shown, in this embodiment, the rotation of eccentric plate II4 is caused by the transmission between eccentric plate I2 and connecting rod 3, and its rotation trajectory is shown in the appendix of the instruction manual. Figure 3 As shown, through the transmission of eccentric plate I2 and connecting rod 3, the angular velocity change curve of eccentric plate II4 is as shown in the attached instruction manual. Figure 4 As shown, the curve is close to a sine curve, and there is a brief pause at low speeds. This causes the fork 12 to pause briefly when it reaches the lowest position of the paper pusher, which can press down the paper on the paper stack 13 and keep the product neat.

[0032] Refer to the instruction manual appendix Figure 6As shown, through the transmission mechanism of the aforementioned shift fork 12, the shift fork 12 can maintain a speed matching that of the folding roller 10 when shifting the paper. When the shift fork 12 shifts the paper from the folding roller 10 onto the paper stack 13, that is, when the shift fork 12 reaches the lowest position of shifting the paper, it can hold at that position for a short time to press down and hold the paper on the paper stack 13, thus ensuring that the product remains neat.

[0033] The shift fork transmission mechanism in this embodiment can effectively ensure the neatness of several sheets on the paper stack. By changing the speed, it can also effectively stagger the shift fork and the bottom blades on the folding roller, thus increasing the thickness and strength of the shift fork. It is effective whether applied to a folding roller with three, four, or more bottom blades.

[0034] Example 2

[0035] As another preferred embodiment of this utility model, this embodiment is a further detailed supplement and explanation of the technical solution of this utility model based on the above-described embodiment 1. In this embodiment, refer to the appendix to the specification. Figure 2 As shown, the driven gear 1 is mounted on the frame of the folding machine via a gear mounting sleeve 14, and the driven gear 1 is rotatably mounted inside the gear mounting sleeve 14; the gear mounting sleeve 14 is provided with an opening 15, through which the driven gear 1 meshes with the driving gear 11 at the end of the folding roller 10 in the folding machine.

[0036] As another embodiment of this invention, please refer to the appendix to the specification. Figure 2 As shown, the support shaft 5 is mounted on the frame of the folding machine by a support bearing seat 16. Further, the support bearing seat 16 includes a fixing plate 17, a connecting plate 18, and a support plate 19. The fixing plate 17 is used for fixed assembly with the folding machine frame; the connecting plate 18 is perpendicular to and fixedly connected to the fixing plate 17; the support plate 19 is perpendicular to and fixedly connected to the connecting plate 18; and a bearing for mounting the support shaft 5 is provided on the support plate 19.

[0037] As an example, a reinforcing rib plate 20 is provided between the bottom of the connecting plate 18 and the fixing plate 17.

[0038] Example 3

[0039] As another preferred embodiment of this utility model, this embodiment is a further detailed supplement and explanation of the technical solution of this utility model based on the above-described embodiment 1 or embodiment 2. In this embodiment, refer to the appendix to the specification. Figure 1 As shown, the end of the transmission arm 8 is sleeved on the shift fork flipping shaft and is positioned and fixed by a pin.

[0040] Further, please refer to the appendix to the instruction manual. Figure 1 and attached Figure 2 As shown, the other end of the transmission arm 8 is provided with a pin I21, and the end of the rocker arm 7 that is hinged to the transmission arm 8 is sleeved on the pin.

[0041] As an example, the transmission arm 8 is provided with a buffer spring 24.

[0042] As another embodiment of this invention, please refer to the appendix to the specification. Figure 5 As shown, a pin II22 is provided on the non-rotation axis portion of the eccentric plate I2, and a pin III23 is provided on the non-rotation axis portion of the eccentric plate II4. One end of the connecting rod 3 is sleeved on the pin II22, and the other end of the connecting rod 3 is sleeved on the pin III23.

Claims

1. A shift fork drive mechanism for a folding machine, characterised in that: It includes driven gear (1), eccentric plate I (2), connecting rod (3), eccentric plate II (4), support shaft (5), eccentric shaft (6), rocker arm (7), transmission arm (8) and fork flip shaft (9), wherein eccentric plate I (2) and driven gear (1) coaxial assembly together, eccentric plate II (4) and support shaft (5) coaxial assembly together; the rotation axis of eccentric plate I (2) is parallel to the rotation axis of eccentric plate II (4) and not collinear; one end of connecting rod (3) is hinged on the non-rotation axis part of eccentric plate I (2), the other end of connecting rod (3) is hinged on the non-rotation axis part of eccentric plate II (4); the eccentric shaft (6) is assembled on the support shaft (5), and the axis of eccentric shaft (6) is parallel to the axis of support shaft (5) and not collinear; one end of the rocker arm (7) is assembled on the eccentric shaft (6) through a bearing, the other end of the rocker arm (7) is hinged with one end of the transmission arm (8), the other end of the transmission arm (8) is fixedly connected with the fork flip shaft (9).

2. The folding machine's finger drive mechanism according to claim 1, characterized in that: The driven gear (1) is assembled on the rack of the folding machine through the gear mounting sleeve (14), and the driven gear (1) is rotatably assembled in the gear mounting sleeve (14); an opening (15) is arranged on the gear mounting sleeve (14), and the driven gear (1) is engaged with the driving gear (11) at the end of the folding roller (10) in the folding machine through the opening (15).

3. A fork drive mechanism for a folding machine as claimed in claim 1 or 2, characterised in that: The support shaft (5) is assembled on the rack of the folding machine by the support bearing seat (16).

4. The folding machine fork drive mechanism of claim 3, wherein: The support bearing seat (16) includes a fixed plate (17), a connecting plate (18) and a support plate (19), the fixed plate (17) is used for fixed assembly with the rack of the folding machine, the connecting plate (18) is perpendicular to the fixed plate (17) and fixedly connected with the fixed plate (17); the support plate (19) is perpendicular to the connecting plate (18) and fixedly connected with the connecting plate (18); the support plate (19) is provided with a bearing for assembling the support shaft (5).

5. The folding machine fork drive mechanism of claim 4 wherein: A reinforcing rib plate (20) is arranged between the bottom of the connecting plate (18) and the fixed plate (17).

6. The folding machine fork drive mechanism of claim 1 or 2, wherein: The end of the transmission arm (8) is sleeved on the fork flip shaft, and is positioned and fixed by a pin.

7. The folding machine fork drive mechanism of claim 6 wherein: The other end of the transmission arm (8) is provided with a pin shaft I (21), and the end of the rocker arm (7) hinged with the transmission arm (8) is sleeved on the pin shaft.

8. The folding machine fork drive mechanism of claim 1 or 2, wherein: A buffer spring (24) is arranged on the transmission arm (8).

9. The folding machine fork drive mechanism of claim 1 or 2, wherein: A pin shaft II (22) is arranged on the non-rotation axis part of the eccentric plate I (2), a pin shaft III (23) is arranged on the non-rotation axis part of the eccentric plate II (4), one end of the connecting rod (3) is sleeved on the pin shaft II (22), and the other end of the connecting rod (3) is sleeved on the pin shaft III (23).

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