Printing plate roller reversing device

Abstract

The utility model relates to a printing plate roller reversing device which comprises a machine frame, a gear assembly is arranged on the machine frame, the gear assembly comprises a driven gear and a driving gear, the driving gear is in transmission connection with a power source, and the gear assembly further comprises a first gear and a reversing gear set. The first gear moves between a working position and a standby position in the axial direction of the first shaft, when the first gear is located at the working position, the first gear is connected with the driving gear and the driven gear, the reversing gear set comprises a third gear and a second gear, and the second gear moves between the working position and the standby position in the axial direction of the second shaft. When the second gear is located at the working position, the third gear is meshed with the second gear, the reversing gear set is connected with the driving gear and the driven gear, the rotating directions of the two meshed gears are opposite, and the reversing gear set is provided with one more gear than the first gear, so that the driven gear is reversed when the reversing gear set participates in transmission between the driven gear and the driving gear.

Description

Technical Field

[0001] This utility model relates to a printing plate roller reversing device. Background Technology

[0002] In the double-sided printing process, after the printing press has printed the front side, the functions of the winding mechanism and the unwinding mechanism are switched, and the printing roller needs to be reversed to adapt to the change in the film feeding direction. At present, servo motors are mostly used to achieve forward and reverse rotation, which is costly. A low-cost reversing structure is proposed. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide a printing plate roller reversing device, which is designed to have the first gear and the reversing gear set take turns participating in the transmission between the driven gear and the driving gear, so as to realize the rotation reversal of the printing plate roller.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This printing plate roller reversing device includes a frame, on which a gear assembly is provided. The gear assembly includes a driven gear and a driving gear. The driven gear drives the printing plate roller, and the driving gear is connected to a power source. The gear assembly further includes a first gear and a reversing gear set. The first gear has a working position and a standby position. The first gear is mounted on a first shaft and moves between the working position and the standby position along the axial direction of the first shaft. When the first gear is in the working position, it engages the driving gear and the driven gear. The reversing gear set includes a third gear and a second gear. The second gear has a working position and a standby position and is mounted on a second shaft. The second gear moves between the working position and the standby position along the axial direction of the second shaft. When the second gear is in the working position, the third gear meshes with the second gear, and the reversing gear set engages the driving gear and the driven gear.

[0005] In this scheme, the two meshing gears rotate in opposite directions. The reversing gear set has one more gear than the first gear, so that when the reversing gear set participates in the transmission between the driven gear and the driving gear, the driven gear rotates in the opposite direction.

[0006] Preferably, both the first shaft and the second shaft are connected to the reversing cylinder for transmission, and the first gear or the second gear is in the working position during operation.

[0007] In this scheme, the corresponding reversing cylinder action drives the extension and retraction of the first and second shafts, so that the first and second gears reach the working position, making reversal convenient.

[0008] Preferably, the frame is provided with a first guide hole and a second guide hole, the first guide hole and the second guide hole being respectively for the first shaft and the second shaft to extend into.

[0009] In this design, the corresponding guide holes guide the extension and retraction of the corresponding shaft.

[0010] Preferably, the frame is provided with a housing, the reversing cylinder is mounted on the housing, the housing and the frame form a protective cavity, and the gear assembly is located inside the housing.

[0011] In this design, the protective cavity is waterproof and dustproof.

[0012] Preferably, the drive gear is driven by the splined shaft, the splined shaft is fitted with a clutch gear, the clutch gear has an external gear ring, a first helical gear is sleeved on the splined shaft, the first helical gear meshes with a second helical gear, the second helical gear is driven by the power source, the inner ring of the helical gear is provided with an internal gear ring and an inner ring in sequence, the inner ring meshes with the splined shaft, the clutch gear has a working position and a standby position, the clutch gear moves along the axial direction of the splined shaft between the working position and the standby position, when the clutch gear is in the working position, the external gear ring meshes with the internal gear ring.

[0013] In this design, the transmission connection between the spline shaft and the power source can be controllably disconnected, allowing for reversal without stopping the power source.

[0014] Preferably, the spline shaft has multiple grooves circumferentially, the grooves extending along the axial direction of the spline shaft, and the inner ring of the clutch gear has protrusions circumferentially, the protrusions corresponding one-to-one with the grooves.

[0015] In this design, the groove and protrusion work together to provide axial movement space for the clutch gear and achieve transmission.

[0016] Preferably, the outer ring of the clutch gear is provided with a drive groove and an external gear ring in sequence along the spline shaft. A slider is slidably fitted in the drive groove. The slider is connected to one end of the driven rocker arm. The other end of the driven rocker arm is connected to a rotating shaft. The rotating shaft is rotatably configured and connected to an active rocker arm. The active rocker arm is hinged to the output shaft of the clutch cylinder.

[0017] In this scheme, the clutch cylinder drives the rotating shaft to rotate through the active swing arm, and the rotating shaft drives the driven swing arm to swing. The slider slides along the slide groove and pushes the clutch gear to move axially along the spline shaft. The swing of the driven swing arm is decomposed into the circumferential movement of the slider along the spline shaft and the axial movement of the clutch gear along the spline shaft.

[0018] Preferably, the frame is further provided with a protective shell, the clutch cylinder is mounted on the protective shell, the rotating shaft is rotatably mounted on the protective shell, and the clutch gear, the first helical gear and the second helical gear are located inside the protective shell.

[0019] In this design, the protective shell is waterproof and dustproof.

[0020] Preferably, the frame is provided with a sliding sleeve, the sliding sleeve is connected to a top plate cylinder, the driven gear meshes with a transmission gear, the transmission gear is driven to a top plate shaft, one end of the top plate shaft is provided with a tapered head, the other end of the top plate shaft extends into the sliding sleeve, the other end of the top plate shaft is connected to a drive block, the drive block is driven to the top plate cylinder, and the drive block is slidably engaged with the sliding sleeve.

[0021] In this scheme, the top plate cylinder moves to drive the drive block to slide along the sliding sleeve, the drive block drives the top plate shaft to move, and the cone head presses the plate roller to complete the installation of the plate roller.

[0022] The beneficial effects of this invention are as follows: the two meshing gears rotate in opposite directions, and the reversing gear set has one more gear than the first gear, so that when the reversing gear set participates in the transmission between the driven gear and the driving gear, the driven gear reverses direction; the corresponding reversing cylinder actuates to drive the extension and retraction of the first and second shafts, allowing the first and second gears to reach their working positions, making reversing convenient; the transmission connection between the spline shaft and the power source can be controllably disconnected, allowing reversing to be performed without stopping the power source. Therefore, this invention has substantial features and progress compared with the prior art. Attached Figure Description

[0023] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This is a three-dimensional structural diagram of the gear assembly in this utility model.

[0026] Figure 3 This is a three-dimensional structural diagram of the clutch gear, the first helical gear, and the second helical gear in this utility model.

[0027] Figure 4 This is a three-dimensional structural diagram of the spline shaft in this utility model.

[0028] Figure 5 This is a three-dimensional structural diagram of the clutch gear in this utility model.

[0029] Figure 6 This is a three-dimensional structural diagram of the first helical gear in this utility model.

[0030] Figure 7 This is a cross-sectional view of the present invention.

[0031] In the diagram: 1. Frame; 2. Gear assembly; 3. Driven gear; 4. First shaft; 5. Drive gear; 6. First gear; 7. Reversing gear set; 8. Third gear; 9. Second gear; 10. Second shaft; 11. Reversing cylinder; 12. First guide hole; 13. Inner ring; 14. Housing; 15. Splined shaft; 16. Clutch gear; 17. External gear ring; 18. First helical gear; 19. Second helical gear; 20. Internal gear ring; 21. Groove; 22. Protrusion; 23. Drive slot; 24. Slider; 25. Driven swing arm; 26. Rotating shaft; 27. Driven swing arm; 28. Clutch cylinder; 29. ​​Protective shell; 30. Sliding sleeve; 31. Top plate cylinder; 32. Transmission gear; 33. Top plate shaft; 34. Cone; 35. Drive block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0035] See appendix Figure 1-6 In one embodiment of this invention, a printing plate roller reversing device includes a frame 1, on which a gear assembly 2 is provided. The gear assembly 2 includes a driven gear 3 and a driving gear 5. The driven gear 3 is used to drive the printing plate roller, and the driving gear 5 is connected to a power source for transmission.

[0036] The gear assembly 2 further includes a first gear 6 and a reversing gear set 7. The first gear 6 has a working position and a standby position. The first gear 6 is disposed on a first shaft 4 and moves between the working position and the standby position along the axial direction of the first shaft 4. When the first gear 6 is in the working position, the first gear 6 engages the driving gear 5 and the driven gear 3. The reversing gear set 7 includes a third gear 8 and a second gear 9. The second gear 9 has a working position and a standby position. The second gear 9 is disposed on a second shaft 10 and moves between the working position and the standby position along the axial direction of the second shaft 10. When the second gear 9 is in the working position, the third gear 8 meshes with the second gear 9 and the reversing gear set 7 engages the driving gear 5 and the driven gear 3.

[0037] Both the first shaft 4 and the second shaft 10 are connected to the reversing cylinder 11 for transmission. During operation, the first gear 6 or the second gear 9 is in the working position. The frame 1 is provided with a first guide hole 12 and a second guide hole 13, which allow the first shaft 4 and the second shaft 10 to extend into, respectively. The frame 1 is provided with a housing 14, and the reversing cylinder 11 is mounted on the housing 14. The housing 14 and the frame 1 form a protective cavity, and the gear assembly 2 is located inside the housing 14.

[0038] The drive gear 5 is connected to the splined shaft 15. The splined shaft 15 is fitted with a clutch gear 16, which has an external gear ring 17. A first helical gear 18 is sleeved on the splined shaft 15. The first helical gear 18 meshes with a second helical gear 19, which is connected to the power source. The inner ring of the helical gear has an internal gear ring 20 and an inner ring 13 in sequence. The inner ring 13 meshes with the splined shaft 15. The clutch gear 16 has a working position and a standby position. The clutch gear 16 moves along the axial direction of the splined shaft 15 between the working position and the standby position. When the clutch gear 16 is in the working position, the external gear ring 17 meshes with the internal gear ring 20.

[0039] The outer ring of the clutch gear 16 is provided with a drive groove 23 and an external gear ring 17 in sequence along the axial direction of the spline shaft 15. The drive groove 23 is slidably fitted with a slider 24. The slider 24 is connected to one end of the driven swing arm 25. The other end of the driven swing arm 25 is connected to the rotating shaft 26. The rotating shaft 26 is rotatably disposed and is connected to an active swing arm 27. The active swing arm 27 is hinged to the output shaft of the clutch cylinder 28. The frame 1 is also provided with a protective shell 29. The clutch cylinder 28 is mounted on the protective shell 29. The rotating shaft 26 is rotatably disposed on the protective shell 29. The clutch gear 16, the first helical gear 18 and the second helical gear 19 are located inside the protective shell 29.

[0040] In this embodiment, during reversal, the clutch cylinder 28 drives the rotating shaft 26 to rotate via the active swing arm 27. The rotating shaft 26 drives the driven swing arm 25 to swing. The driven swing arm 25 drives the clutch gear 16 to move axially along the spline shaft 15 through the sliding engagement of the slider 24 (specifically a bearing) and the drive groove 23. The clutch gear 16 separates from the first helical gear 18, the spline shaft 15 stops rotating, and the first gear 6, which participates in the transmission of the active gear 5 and the driven gear 3, stops. The reversing cylinder 11 drives the first shaft 4 to retract, causing the first gear 6 to reach the standby position. The second gear 9 is then rotated. The teeth of the first gear 17 are misaligned with the teeth of the third gear 8 to mesh smoothly. Another reversing cylinder 11 drives the second shaft 10 to extend and drive the second gear 9 to the working position. The corresponding guide hole can not only guide the extension and retraction of the corresponding shaft, but also support the corresponding shaft to ensure the stability of the shaft during transmission. The specific location of the power source is not limited, and the layout of the power source is a mature technology. The inner ring 13 slides with the spline shaft 15, and the inner ring abuts against the spline shaft 15 to obtain support. When the clutch gear 16 returns to the working position, it must first misalign the outer gear ring 17 with the inner gear ring 20 of the first helical gear 18.

[0041] In other alternative implementations, the position of the corresponding gear on the corresponding shaft can also be adjusted manually.

[0042] See appendix Figure 7 The frame 1 is provided with a sliding sleeve 30, which is connected to a top plate cylinder 31. The driven gear 3 meshes with a transmission gear 32, which is connected to a top plate shaft 33. One end of the top plate shaft 33 is provided with a cone head 34, and the other end of the top plate shaft 33 extends into the sliding sleeve 30. The other end of the top plate shaft 33 is connected to a drive block 35, which is connected to the top plate cylinder 31 and slides with the sliding sleeve 30.

[0043] In this embodiment, the top plate cylinder 31 drives the top plate shaft 33 to move axially through the drive block 35, the cone head 34 presses against the end of the plate roller, and the top plate shaft 33 is connected to the driven gear 3 through the transmission gear 32, increasing the distance with the reversing cylinder 11 and avoiding interference.

[0044] The above description represents the preferred embodiment of this utility model. It should be noted that the scope of protection of this utility model is not limited thereto. For those skilled in the art, various improvements, modifications, or equivalent substitutions can be made without departing from the equivalent inventive concept disclosed in this utility model, and these can also be considered as part of the scope of protection of this utility model.

Claims

1. A printing plate roller reversing device, comprising a frame (1), wherein a gear assembly (2) is provided on the frame (1), the gear assembly (2) comprising a driven gear (3) and a driving gear (5), the driven gear (3) being used to drive the printing plate roller, and the driving gear (5) being connected to a power source for transmission, characterized in that: The gear assembly (2) also includes The first gear (6) has a working position and a standby position. The first gear (6) is disposed on the first shaft (4). The first gear (6) moves between the working position and the standby position along the axial direction of the first shaft (4). When the first gear (6) is in the working position, the first gear (6) connects the driving gear (5) and the driven gear (3). The reversing gear set (7) includes a third gear (8) and a second gear (9). The second gear (9) has a working position and a standby position. The second gear (9) is disposed on a second shaft (10). The second gear (9) moves between the working position and the standby position along the axial direction of the second shaft (10). When the second gear (9) is in the working position, the third gear (8) meshes with the second gear (9) and the reversing gear set (7) connects the driving gear (5) and the driven gear (3).

2. The printing plate roller reversing device as described in claim 1, characterized in that: Both the first shaft (4) and the second shaft (10) are connected to the reversing cylinder (11) for transmission. When working, the first gear (6) or the second gear (9) is in the working position.

3. The printing plate roller reversing device as described in claim 2, characterized in that: The frame (1) is provided with a first guide hole (12) and a second guide hole, the first guide hole (12) and the second guide hole respectively for the first shaft (4) and the second shaft (10) to extend into.

4. The printing plate roller reversing device as described in claim 1, characterized in that: The frame (1) is provided with a housing (14), the reversing cylinder (11) is installed on the housing (14), the housing (14) and the frame (1) form a protective cavity, and the gear assembly (2) is located inside the housing (14).

5. A printing plate roller reversing device as described in claim 1, characterized in that: The drive gear (5) is connected to the spline shaft (15) for transmission. The spline shaft (15) is fitted with a clutch gear (16). The clutch gear (16) has an external gear ring (17). A first helical gear (18) is sleeved on the spline shaft (15). The first helical gear (18) meshes with a second helical gear (19). The second helical gear (19) is connected to the power source for transmission. The inner ring of the helical gear is provided with an internal gear ring (20) and an inner ring (13) in sequence. The inner ring (13) is engaged with the spline shaft (15). The clutch gear (16) has a working position and a standby position. The clutch gear (16) moves between the working position and the standby position along the axial direction of the spline shaft (15). When the clutch gear (16) is in the working position, the external gear ring (17) meshes with the internal gear ring (20).

6. The printing plate roller reversing device as described in claim 5, characterized in that: The spline shaft (15) is provided with a plurality of grooves (21) in the circumferential direction. The grooves (21) extend along the axial direction of the spline shaft (15). The inner ring of the clutch gear (16) is provided with a protrusion (22) in the circumferential direction. The protrusion (22) corresponds one-to-one with the groove (21).

7. A printing plate roller reversing device as described in claim 5, characterized in that: The outer ring of the clutch gear (16) is provided with a drive groove (23) and an external gear ring (17) in sequence along the axial direction of the spline shaft (15). The drive groove (23) is slidably fitted with a slider (24). The slider (24) is connected to one end of the driven rocker arm (25). The other end of the driven rocker arm (25) is connected to the rotating shaft (26). The rotating shaft (26) is rotatably set. The rotating shaft (26) is connected to an active rocker arm (27). The active rocker arm (27) is hinged to the output shaft of the clutch cylinder (28).

8. The printing plate roller reversing device as described in claim 7, characterized in that: The frame (1) is also provided with a protective shell (29), the clutch cylinder (28) is installed on the protective shell (29), the rotating shaft (26) is rotatably arranged on the protective shell (29), and the clutch gear (16), the first helical gear (18) and the second helical gear (19) are located inside the protective shell (29).

9. A printing plate roller reversing device as described in claim 1, characterized in that: The frame (1) is provided with a sliding sleeve (30), the sliding sleeve (30) is connected to a top plate cylinder (31), the driven gear (3) meshes with a transmission gear (32), the transmission gear (32) is connected to a top plate shaft (33), one end of the top plate shaft (33) is provided with a cone head (34), the other end of the top plate shaft (33) extends into the sliding sleeve (30), the other end of the top plate shaft (33) is connected to a drive block (35), the drive block (35) is connected to the top plate cylinder (31), and the drive block (35) is slidably engaged with the sliding sleeve (30).

Images