Folding phase adjusting mechanism of book and periodical folding machine

Abstract

The invention relates to a folding phase adjusting mechanism of a book and periodical folding machine. The eccentric shaft comprises a left shaft body, a middle shaft body and a right shaft body, and the left shaft body and the right shaft body are coaxially arranged and are eccentrically arranged with the middle shaft body; the left-hand gear is meshed with the crochet hook gear, and the left-hand gear is provided with a first inner hole I and a second inner hole I which are coaxial and are arranged in a stepped manner; the left-hand gear is rotationally arranged on the left shaft in a sleeving manner through a first inner hole I, and a second inner hole I extends to the position of the middle shaft; the left inner straight gear is mounted in the first inner hole I; the right-handed gear is meshed with the folding knife gear, and the right-handed gear is provided with a first inner hole II and a second inner hole II which are coaxial and are arranged in a stepped manner; the right-handed gear is rotationally arranged on the left shaft in a sleeving manner through a first inner hole II, and a second inner hole II extends to the position of the middle shaft; the right inner straight gear is mounted in the second inner hole II; and the intermediate gear is rotationally arranged on the intermediate shaft in a sleeving mode, and the intermediate gear is meshed with the left inner straight gear and the right inner straight gear. According to the invention, a relatively large phase adjustment range can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of book and periodical folding machines, in particular to a folding phase adjustment mechanism for book and periodical folding machines. Background Art

[0002] Due to the variety of book and periodical formats, book and periodical folding machines are required to be able to meet the folding requirements of different format specifications. The folding methods will be different for different formats. For example, the folding method for 8-page is half folding, while the folding method for 24-page is center folding. Therefore, the folding phase adjustment for different format specifications is frequent.

[0003] At present, the phase adjustment mechanism of the existing folding machines on the market mostly adopts a pair of meshing helical gears, and changes the circumferential position through the axial linear motion of the helical gears, so as to achieve the purpose of folding phase adjustment. However, the helical angle of the helical gear is limited in manufacturing and processing, so the range of phase adjustment is relatively limited, which can only meet the requirements of positive and negative overlap adjustment of the 8-fold folding phase, but cannot produce 24-fold folding products.

[0004] Some folding machines use harmonic gear transmission. Although it can meet the folding requirements of 8-page and 24-page interchangeably, the flexible wheel in the harmonic gear must be able to withstand large torque during manufacturing and processing, and must be processed very thin with a very small modulus to meet the deformation requirements. This has high requirements on the mechanical properties of the material, processing technology, and heat treatment technology. Not only is the production cost very high, but as the folding roller rotates one circle, the flexible wheel will experience two extrusion deformations while bearing large torque, and fatigue fracture may occur over time. Summary of the invention

[0005] To this end, the present invention provides a folding phase adjustment mechanism for a book folding machine, which can achieve a larger phase adjustment range and effectively solve the problems that the existing helical gear transmission 8-page and 24-page cannot be interchanged and the harmonic gear transmission has insufficient load-bearing capacity.

[0006] In order to solve the above technical problems, the present invention provides a folding phase adjustment mechanism for a book and periodical folding machine, the book and periodical folding machine comprises a delivery roller, on which a hook gear and a folding knife gear are coaxially arranged, comprising: An eccentric shaft, comprising a left shaft, an intermediate shaft and a right shaft connected in sequence, wherein the left shaft and the right shaft are coaxially arranged and are eccentrically arranged with respect to the intermediate shaft respectively; A left-handed gear meshing with the hook gear, the left-handed gear having a first inner hole 1 and a second inner hole 1 coaxially arranged in a stepped manner; the left-handed gear is rotatably sleeved on the left shaft through the first inner hole 1, and the second inner hole 1 extends to the position of the intermediate shaft; A left internal spur gear is installed in the first inner hole; A right-handed gear meshing with the folding knife gear, the right-handed gear having a first inner hole 2 and a second inner hole 2 coaxially arranged in a stepped manner; the right-handed gear is rotatably sleeved on the left shaft through the first inner hole 2, and the second inner hole 2 extends to the position of the intermediate shaft; a right internal spur gear, installed in the second inner hole; An intermediate gear is rotatably sleeved on the intermediate shaft, and the intermediate gear is respectively meshed with the left inner spur gear and the right inner spur gear; The phase between the hook gear and the folding knife gear can be adjusted by rotating the eccentric shaft.

[0007] In one embodiment of the present invention, a first double-row angular contact ball bearing and a first cylindrical roller bearing are provided between the first inner hole 1 of the left-handed gear and the left shaft; A first spacer sleeve is provided on the left shaft, and a first bearing pressure plate is connected to the left-handed gear. The inner ring of the first cylindrical roller bearing is abutted against the shoulder shaft on one side of the intermediate shaft. The first spacer sleeve and the first bearing pressure plate are respectively abutted against the inner and outer rings of the first double-row angular contact ball bearing to perform axial positioning of the first cylindrical roller bearing and the first double-row angular contact ball bearing.

[0008] In one embodiment of the present invention, a second double-row angular contact ball bearing and a second cylindrical roller bearing are provided between the first inner hole 2 of the right-handed gear and the right shaft; A second spacer sleeve is provided on the right shaft, and a second bearing pressure plate is connected to the right-handed gear. The inner ring of the second cylindrical roller bearing is abutted against the shoulder shaft on the other side of the intermediate shaft. The second spacer sleeve and the second bearing pressure plate are respectively abutted against the inner and outer rings of the second double-row angular contact ball bearing to axially position the second cylindrical roller bearing and the second double-row angular contact ball bearing.

[0009] In one embodiment of the present invention, it also includes a first bearing seat installed on the wall panel, in which a third cylindrical roller bearing is installed for axial positioning through a retaining ring through a hole, the left shaft is rotatably connected to the first bearing seat through the third cylindrical roller bearing, and the end face of the left shaft is connected to a shaft end pressure cover located on one side of the inner ring of the third cylindrical roller bearing.

[0010] In one embodiment of the present invention, it also includes a support rod, one end of which is installed on the wall panel, and the other end extends to the outside of the right shaft and is connected to a support plate, a second bearing seat is installed on the support plate, and a third double-row angular contact ball bearing is installed in the second bearing seat, and the right shaft is rotatably connected to the second bearing seat through the third double-row angular contact ball bearing.

[0011] In one embodiment of the present invention, it also includes a connecting shaft and a locking plate, the outer end of the second bearing seat is connected to an oil seal end cover, the connecting shaft is connected to the right shaft and can drive the eccentric shaft to rotate, the locking plate is sleeved on the connecting shaft, and the locking plate can be locked and loosened connected to the outer end surface of the oil seal end cover through a locking piece, and the oil seal end cover is provided with an oil seal that is sleeved on the outside of the connecting shaft and abuts against the third double-row angular contact ball bearing.

[0012] In one embodiment of the present invention, a scale dial handwheel is connected to the connecting shaft.

[0013] In one embodiment of the present invention, it also includes a needle bearing, a shaft retaining ring and a spacer. The needle bearing is arranged between the intermediate shaft and the intermediate gear. The two ends of the inner ring of the needle bearing are axially positioned by the shaft retaining ring, and the two ends of the outer ring of the needle bearing are axially positioned by the spacer.

[0014] In one embodiment of the present invention, the eccentricity between the intermediate shaft and the left shaft or the right shaft is equal to the center distance between the intermediate gear and the left internal spur gear or the right internal spur gear.

[0015] In one embodiment of the present invention, there is a preset difference in the number of teeth between the left internal spur gear and the right internal spur gear.

[0016] The above technical solution of the present invention has the following advantages compared with the prior art: The folding phase adjustment mechanism of a book and periodical folding machine described in the present invention realizes a wider range of folding phase adjustment through the precise matching of the eccentric shaft and the gear set, can adapt to the requirements of different book opening specifications, and improves the adaptability of the folding machine. The gear phase is finely adjusted by adjusting the rotation position of the eccentric shaft, which greatly improves the accuracy of the folding phase adjustment and ensures that the hook gear and the folding knife gear can change the phase as needed when the rotation speed is synchronized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the folding phase adjustment mechanism of the book and periodical folding machine of the present invention.

[0019] Figure 2 It is a partial structural schematic diagram of the folding phase adjustment mechanism of the book and periodical folding machine of the present invention.

[0020] Figure 3 It is a transmission schematic diagram of the folding phase adjustment mechanism of the book and periodical folding machine of the present invention.

[0021] Figure 4 yes Figure 3 Schematic diagram along the AA direction.

[0022] Description of the Figures in the Specification: 100, phase adjustment mechanism; 200, presentation roller; 300, cutting roller; 1. Dial hand wheel; 2. Locking plate; 3. Oil seal end cover; 4. Third double-row angular contact ball bearing; 5. Support plate; 6a. First double-row angular contact ball bearing; 6b. Second double-row angular contact ball bearing; 7a. First cylindrical roller bearing; 7b. Second cylindrical roller bearing; 8. Right-handed gear; 9. Jackknife gear; 10. Hook gear; 11. Left-handed gear; 12. First bearing pressure plate; 13. First spacer; 14. First bearing seat; 15. Wall panel; 16 , support rod; 17, shaft end pressure cover; 18, third cylindrical roller bearing; 19, hole retaining ring; 20, eccentric shaft; 20a, left shaft; 20b, intermediate shaft; 20c, right shaft; 21, left internal spur gear; 22, intermediate gear; 23, right internal spur gear; 24, needle roller bearing; 25, spacer; 26, shaft retaining ring; 27, second bearing pressure plate; 28, second spacer; 29, second bearing seat; 30, oil seal; 31, connecting shaft; 32, cutting gear. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0025] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Reference Figures 1 to 4 As shown, a folding phase adjustment mechanism 100 of a book folding machine, the book folding machine comprises a delivery cylinder 200 and a cutting cylinder 300, the end of the delivery cylinder 200 is provided with a coaxial hook gear 10 and a folding knife gear 9; the end of the cutting cylinder 300 is provided with a cutting gear 32 meshing with the hook gear 10; The phase adjustment mechanism 100 comprises: The eccentric shaft 20 comprises a left shaft 20a, an intermediate shaft 20b and a right shaft 20c which are connected in sequence, wherein the left shaft 20a and the right shaft 20c are coaxially arranged and are eccentrically arranged with respect to the intermediate shaft 20b respectively; The left-handed gear 11 is meshed with the hook gear 10, and the left-handed gear 11 has a first inner hole 1 and a second inner hole 1 which are coaxial and arranged in a stepped manner; the left-handed gear 11 is rotatably sleeved on the left shaft 20a through the first inner hole 1, and the second inner hole 1 extends to the position of the intermediate shaft 20b; The left inner spur gear 21 is installed in the first inner hole 1 by means of screws and positioning pins; The right-handed gear 8 is meshed with the folding knife gear 9, and the right-handed gear 8 has a first inner hole 2 and a second inner hole 2 which are coaxial and arranged in a stepped manner; the right-handed gear 8 is rotatably sleeved on the left shaft 20a through the first inner hole 2, and the second inner hole 2 extends to the position of the intermediate shaft 20b; The right inner spur gear 23 is installed in the second inner hole 2 by screws and positioning pins; An intermediate gear 22 (intermediate spur gear) is rotatably sleeved on the intermediate shaft 20b, and the intermediate gear 22 is respectively meshed with the left inner spur gear 21 and the right inner spur gear 23; The phase between the hook gear 10 and the folding knife gear 9 can be adjusted by rotating the eccentric shaft 20 .

[0028] It should be noted that the power is transmitted from the cutter gear to the hook gear 10, and then to the left-handed gear 11. The left-handed gear 11 and the left inner spur gear 21 form a double gear. At this time, the power is transmitted to the left inner spur gear 21 and transmitted to the right inner spur gear 23 through the intermediate gear 22. The right inner spur gear 23 and the right-handed gear 8 form a double gear. At this time, the power is transmitted to the right-handed gear 8 and finally to the folding knife gear 9.

[0029] Since the hook gear 10 and the folding knife gear 9 are coaxial, their rotation speeds must be the same, and the number of teeth of the hook gear 10 and the folding knife gear 9, the number of teeth of the left-handed gear 11 and the right-handed gear 8, and the number of teeth of the left inner spur gear 21 and the right inner spur gear 23 are the same. After transmission, the output shaft transmission ratio of the folding knife gear 9 is 1, so the hook gear 10 and the folding knife gear 9 are at the same speed. Since the cutter gear and the hook gear 10 are meshed, this ensures that the position of the hook hole remains unchanged relative to the position of the cutting edge of the paper tape. The phase adjustment mentioned here actually means that the distance from the hook hole position to the fold has changed, which requires that the hook gear 10 and the folding knife gear 9 must be able to change the phase between them while the rotation speed is synchronized, so as to change the relative position of the hook and the folding knife and realize the adjustment of the folding phase.

[0030] In one embodiment, a first double-row angular contact ball bearing 6a and a first cylindrical roller bearing 7a are provided between the first inner hole 1 of the left-handed gear 11 and the left shaft 20a; A first spacer sleeve 13 is provided on the left shaft 20a, and a first bearing pressure plate 12 is connected to the left-handed gear 11. The inner ring of the first cylindrical roller bearing 7a is abutted against the shoulder shaft on one side of the intermediate shaft 20b. The first spacer sleeve 13 and the first bearing pressure plate 12 are respectively abutted against the inner and outer rings of the first double-row angular contact ball bearing 6a to axially position the first cylindrical roller bearing 7a and the first double-row angular contact ball bearing 6a.

[0031] In one embodiment, a second double-row angular contact ball bearing 6b and a second cylindrical roller bearing 7b are provided between the first inner hole 2 of the right-handed gear 8 and the right shaft 20c; A second spacer sleeve 28 is provided on the right shaft 20c, and a second bearing pressure plate 27 is connected to the right-handed gear 8. The inner ring of the second cylindrical roller bearing 7b is abutted against the shoulder shaft on the other side of the intermediate shaft 20b. The second spacer sleeve 28 and the second bearing pressure plate 27 are respectively abutted against the inner and outer rings of the second double-row angular contact ball bearing 6b to axially position the second cylindrical roller bearing 7b and the second double-row angular contact ball bearing 6b.

[0032] The use of double-row angular contact ball bearings, cylindrical roller bearings and needle roller bearings 24 and other structural components can effectively disperse the radial and axial loads generated during the folding process, reduce friction and wear, and increase the service life of the entire device. In particular, the eccentric shaft 20 and the gear set structure have higher durability, avoiding the risk of fatigue fracture of traditional harmonic gear transmission due to long-term torque.

[0033] In one embodiment, it also includes a first bearing seat 14 installed on the wall panel 15, and a third cylindrical roller bearing 18 is installed in the first bearing seat 14 for axial positioning through a retaining ring 19 through a hole. The left shaft 20a is rotatably connected to the first bearing seat 14 through the third cylindrical roller bearing 18, and the end face of the left shaft 20a is connected to a shaft end cover 17 located on one side of the inner ring of the third cylindrical roller bearing 18.

[0034] In one embodiment, it also includes a support rod 16, one end of which is installed on the wall panel 15, and the other end extends to the outside of the right shaft 20c and is connected to the support plate 5, and a second bearing seat 29 is installed on the support plate 5, and a third double-row angular contact ball bearing 4 is installed in the second bearing seat 29, and the right shaft 20c is rotatably connected to the second bearing seat 29 through the third double-row angular contact ball bearing 4.

[0035] In one embodiment, it also includes a connecting shaft 31 and a locking plate 2, the outer end of the second bearing seat 29 is connected to an oil seal end cover 3, the connecting shaft 31 is connected to the right shaft 20c and can drive the eccentric shaft 20 to rotate, the locking plate 2 is sleeved on the connecting shaft 31, and the locking plate 2 can be locked and loosened connected to the outer end surface of the oil seal end cover 3 through a locking member (such as a locking screw), and the oil seal end cover 3 is provided with an oil seal 30 sleeved on the outside of the connecting shaft 31 and against the third double-row angular contact ball bearing 4.

[0036] In one embodiment, a scale dial hand wheel 1 is connected to the connecting shaft 31, making the phase adjustment process more intuitive and accurate. The operator only needs to loosen the locking disk 2 and adjust the folding phase by rotating the hand wheel, which simplifies the operation process and avoids the problem of complex and error-prone traditional mechanical adjustment.

[0037] In one embodiment, it also includes a needle bearing 24, a shaft retaining ring 26 and a spacer 25, wherein the needle bearing 24 is arranged between the intermediate shaft 20b and the intermediate gear 22, and the two ends of the inner ring of the needle bearing 24 are axially positioned by the shaft retaining ring 26; wherein the two ends of the outer ring of the needle bearing 24 are axially positioned by the spacer 25, and the spacer 25 is in axial contact with the end faces of the left-handed gear 11, the right-handed gear 8 and the first cylindrical roller bearing 7a.

[0038] Specifically, the eccentricity between the intermediate shaft 20b and the left shaft 20a or the right shaft 20c is equal to the center distance between the intermediate gear 22 and the left internal spur gear 21 or the right internal spur gear 23. The left internal spur gear 21 and the right internal spur gear 23 have a preset difference in the number of teeth (such as 1).

[0039] The process of adjusting the folding phase: loosen the locking screw on the locking disk 2, rotate the scale dial handwheel 1, and drive the eccentric shaft 20 to rotate through the connecting shaft 31. Since the eccentric distance of the eccentric shaft 20 is equal to the center distance between the left inner spur gear 21 and the middle gear 22, it is also equal to the center distance between the right inner spur gear 23 and the middle gear 22. When the eccentric shaft 20 rotates, the eccentric position changes, so the meshing position of the inner and outer spur gears also changes. The middle spur gear will rotate with the eccentric rotation, and the number of teeth of the left inner spur gear 21 and the right inner spur gear 23 meshing therewith differs by 1. Therefore, for every rotation of the middle gear 22, the phase of the left inner spur gear 21 and the right inner spur gear 23 will differ by one tooth, and then the phases of the hook gear 10 and the folding knife gear 9 meshing therewith will also differ by one tooth, thereby achieving the purpose of adjusting the folding phase.

[0040] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A folding phase adjustment mechanism for a book folding machine, the book folding machine comprising a delivery roller (200), the delivery roller (200) being provided with a hook gear (10) and a folding knife gear (9) coaxially arranged, characterized in that: include: An eccentric shaft (20), comprising a left shaft (20a), an intermediate shaft (20b), and a right shaft (20c) connected in sequence, wherein the left shaft (20a) and the right shaft (20c) are coaxially arranged and are respectively eccentrically arranged with respect to the intermediate shaft (20b); a left-handed gear (11) meshing with the hook gear (10), the left-handed gear (11) having a first inner hole 1 and a second inner hole 1 which are coaxial and arranged in a stepped manner; the left-handed gear (11) is rotatably sleeved on the left shaft (20a) through the first inner hole 1, and the second inner hole 1 extends to the position of the intermediate shaft (20b); A left inner spur gear (21) installed in the first inner hole; a right-handed gear (8) meshing with the folding knife gear (9), the right-handed gear (8) having a first inner hole 2 and a second inner hole 2 which are coaxial and arranged in a stepped manner; the right-handed gear (8) is rotatably sleeved on the left shaft (20a) through the first inner hole 2, and the second inner hole 2 extends to the position of the intermediate shaft (20b); A right internal spur gear (23), installed in the second inner hole; An intermediate gear (22) is rotatably sleeved on the intermediate shaft (20b), and the intermediate gear (22) is respectively meshed with the left inner spur gear (21) and the right inner spur gear (23); The phase between the hook gear (10) and the folding knife gear (9) can be adjusted by rotating the eccentric shaft (20).

2. The folding phase adjustment mechanism of a book and periodical folding machine according to claim 1, characterized in that: A first double-row angular contact ball bearing (6a) and a first cylindrical roller bearing (7a) are provided between the first inner hole 1 of the left-handed gear (11) and the left shaft (20a); The left shaft (20a) is provided with a first spacer sleeve (13), the left-handed gear (11) is connected with a first bearing pressure plate (12), the inner ring of the first cylindrical roller bearing (7a) is abutted against a shoulder shaft on one side of the intermediate shaft (20b), and the first spacer sleeve (13) and the first bearing pressure plate (12) are respectively abutted against the inner and outer rings of the first double-row angular contact ball bearing (6a) to perform axial positioning on the first cylindrical roller bearing (7a) and the first double-row angular contact ball bearing (6a).

3. The folding phase adjustment mechanism of a book folding machine according to claim 1, characterized in that: A second double-row angular contact ball bearing (6b) and a second cylindrical roller bearing (7b) are provided between the first inner hole 2 of the right-handed gear (8) and the right shaft (20c); The right shaft (20c) is provided with a second spacer sleeve (28), the right-handed gear (8) is connected with a second bearing pressure plate (27), the inner ring of the second cylindrical roller bearing (7b) is abutted against the shoulder shaft on the other side of the intermediate shaft (20b), and the second spacer sleeve (28) and the second bearing pressure plate (27) are respectively abutted against the inner and outer rings of the second double-row angular contact ball bearing (6b) to perform axial positioning on the second cylindrical roller bearing (7b) and the second double-row angular contact ball bearing (6b).

4. The folding phase adjustment mechanism of a book folding machine according to claim 1, characterized in that: It also includes a first bearing seat (14) mounted on the wall panel (15), a third cylindrical roller bearing (18) being mounted in the first bearing seat (14) and axially positioned by a retaining ring (19) through a hole, the left shaft (20a) being rotatably connected to the first bearing seat (14) via the third cylindrical roller bearing (18), and an end face of the left shaft (20a) being connected to a shaft end gland (17) located on one side of the inner ring of the third cylindrical roller bearing (18).

5. The folding phase adjustment mechanism of a book folding machine according to claim 4, characterized in that: It also comprises a support rod (16), one end of which is mounted on the wall panel (15), and the other end of which extends to the outside of the right shaft (20c) and is connected to a support plate (5), a second bearing seat (29) being mounted on the support plate (5), a third double-row angular contact ball bearing (4) being mounted in the second bearing seat (29), and the right shaft (20c) is rotatably connected to the second bearing seat (29) via the third double-row angular contact ball bearing (4).

6. The folding phase adjustment mechanism of a book and periodical folding machine according to claim 5, characterized in that: The invention also comprises a connecting shaft (31) and a locking plate (2); the outer end of the second bearing seat (29) is connected to an oil seal end cover (3); the connecting shaft (31) is connected to the right shaft (20c) and can drive the eccentric shaft (20) to rotate; the locking plate (2) is sleeved on the connecting shaft (31); the locking plate (2) is connected to the outer end surface of the oil seal end cover (3) in a lockable and releasable manner via a locking member; the oil seal end cover (3) is provided with an oil seal (30) sleeved on the outside of the connecting shaft (31) and abutting against the third double-row angular contact ball bearing (4).

7. The folding phase adjustment mechanism of a book and periodical folding machine according to claim 6, characterized in that: The connecting shaft (31) is connected to a scale dial hand wheel (1).

8. The folding phase adjustment mechanism of a book folding machine according to claim 1, characterized in that: It also includes a needle roller bearing (24), a shaft retaining ring (26) and a spacer (25), wherein the needle roller bearing (24) is arranged between the intermediate shaft (20b) and the intermediate gear (22), the two ends of the inner ring of the needle roller bearing (24) are axially positioned by the shaft retaining ring (26), and the two ends of the outer ring of the needle roller bearing (24) are axially positioned by the spacer (25).

9. The folding phase adjustment mechanism of a book and periodical folding machine according to claim 1, characterized in that: The eccentricity between the intermediate shaft (20b) and the left shaft (20a) or the right shaft (20c) is equal to the center distance between the intermediate gear (22) and the left internal spur gear (21) or the right internal spur gear (23).

10. The folding phase adjustment mechanism of a book and periodical folding machine according to claim 1, characterized in that: There is a preset difference in the number of teeth between the left internal spur gear (21) and the right internal spur gear (23).

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