Paper cutting knife mechanism

Abstract

The utility model discloses a paper cutter mechanism which comprises an outer shell, a first gear, a second gear and a third gear are arranged in the outer shell in a rotating mode, the first gear is meshed with the second gear, the second gear is meshed with the third gear, the first gear is connected with a transmission sleeve through a fastener, the second gear is connected with a supporting shaft, and the supporting shaft is connected with the transmission sleeve. A polygonal transmission hole is formed in the middle of the transmission sleeve, the power shaft can be inserted into the transmission hole, the third gear is connected with an output shaft, the output shaft is connected with a cutter holder, a round cutter is arranged on the cutter holder, and arc grooves penetrating front and back are formed in the corners of the transmission hole; the transmission sleeve, the rotating sleeve, the supporting shaft and the output shaft are all sleeved with bearings, and clamping grooves for containing the bearings are formed in the outer shell. The round cutter is good in transmission stability and more convenient to produce and assemble.

Description

Technical Field

[0001] The utility model relates to paper processing equipment, in particular to a paper cutting knife mechanism. Background Art

[0002] The cutting knife mechanism is used to cut paper during the processing of paper. One type of cutting knife mechanism uses a polygonal power shaft and a rotating sleeve for plug-in connection, and then the rotating sleeve drives the cutting knife to rotate to achieve the paper cutting operation. The defects that exist in actual use are: 1. When the power shaft and the rotating sleeve are plug-in connected, the corners of the polygonal power shaft are easy to collide with the rotating sleeve, which makes the plug-in difficult, and may even cause damage to the plug-in slot on the power shaft or the rotating sleeve, affecting the plug-in quality; 2. In the transmission mechanism of the cutting knife, bearings need to be set to support the rotation of most of the rotating parts, but an end cover structure is also required to realize the positioning of the bearing on the rotating part, resulting in a complex structure and cumbersome assembly operation. At the same time, this structure must first install the bearing on the rotating part, and then install the outer shell, which is not suitable for some automated rapid assembly methods. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a paper cutting knife mechanism for solving the above-mentioned problem.

[0004] To this end, the utility model is implemented by adopting the following scheme:

[0005] A paper cutter mechanism comprises an outer shell, the outer shell comprises a left outer shell and a right outer shell, a first gear, a second gear and a third gear are rotatably arranged in the outer shell, the first gear is meshed with the second gear, the second gear is meshed with the third gear, the first gear is connected to a transmission sleeve through a fastener, the second gear is connected to a support shaft, a polygonal transmission hole is provided in the middle of the transmission sleeve, a power shaft can be inserted into the transmission hole, the third gear is connected to an output shaft, the output shaft is connected to a cutter seat, a circular cutter is arranged on the cutter seat, the transmission hole is provided with an arc groove penetrating front and back at its corner position, a rotating sleeve is integrally arranged on the first gear, the transmission sleeve, the rotating sleeve, the support shaft and the output shaft are all provided with bearings, and a mounting groove for placing the bearing is provided in the outer shell.

[0006] The cutter seat includes a front seat body, a transmission column portion is provided at one end of the output shaft, a transmission groove is provided on the front seat body for inserting the transmission column portion, an insertion portion is extended on the front seat body, and the middle part of the circular cutter has an insertion hole that cooperates with the insertion portion, the front seat body is connected to the pressure plate by fasteners, and the circular cutter is pressed between the pressure plate and the front seat body.

[0007] A connecting seat is fixedly arranged on the outer shell, connecting parts are extendedly arranged on both sides of the connecting seat, and connecting holes are opened on the connecting parts.

[0008] A paper cutter mechanism of the above technical solution has a simple structure, reasonable design, and can be mass-produced; by providing front and rear arc grooves penetrating the corners of the transmission hole to provide clearance space, when the power shaft is inserted into the transmission hole, the corners of the polygonal transmission part of the power shaft are not easy to collide with the transmission hole, making the plug-in connection operation between the power shaft and the transmission hole more convenient and less likely to cause collision, deformation and damage to the components; by directly providing a clamping groove for placing the bearing in the outer shell, the positioning of one side of the bearing can be achieved, replacing the additional end cover structure, making its assembly operation easier, and during assembly, you can choose to first clamp the bearing into the outer shell, and then perform the final assembly, which can adapt to some automated installation processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model has the following drawings:

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 for Figure 1 A view from another perspective;

[0012] Figure 3 for Figure 2 View without the left shell;

[0013] Figure 4 This is a structural diagram of the utility model without the right housing and the cutter seat;

[0014] Figure 5 It is a structural diagram of the left shell and the right shell of the utility model;

[0015] Figure 6 This is a split structural diagram of the cutter seat of the utility model. DETAILED DESCRIPTION

[0016] As shown in the figure, a paper cutter mechanism disclosed by the utility model includes an outer shell, which includes a left outer shell 1 and a right outer shell 2. A first gear 18, a second gear 17 and a third gear 16 are rotatably arranged in the outer shell. The first gear 18 is meshed with the second gear 17, and the second gear 17 is meshed with the third gear 16. The first gear 18 is connected to the transmission sleeve 3 through a fastener, and the second gear 17 is connected to the support shaft 13. A polygonal transmission hole 5 is opened in the middle of the transmission sleeve 3, and the power shaft can be inserted into the transmission hole 5. The third gear 16 is connected to the transmission sleeve 3 through a fastener. The gear 16 is connected to the output shaft 14, and the output shaft 14 is connected to the cutter seat. The cutter seat is provided with a circular cutter 6. The transmission hole 5 is provided with a circular arc groove 4 running through the front and back at its corner position. The first gear 18 is integrally provided with a rotating sleeve 12. The transmission sleeve 3, the rotating sleeve 12, the support shaft 13 and the output shaft 14 are all provided with bearings 15. A mounting groove 19 for placing the bearing 15 is provided in the outer shell. Of course, the rotating sleeve 12, the transmission sleeve 3, the support shaft 13 and the output shaft are all provided with a positioning step that abuts against one side of the bearing. Specifically, the cutter seat includes a front seat body 20, a transmission column 23 is provided at one end of the output shaft 14, a transmission groove 21 for inserting the transmission column 23 is provided on the front seat body 20, an insertion portion 22 is extended on the front seat body 20, and the middle part of the circular cutter 6 has an insertion hole 24 that cooperates with the insertion portion 22. The front seat body 20 is connected to the pressure plate 8 through fasteners, and the circular cutter 6 is pressed between the pressure plate 8 and the front seat body 20. The cover plate 7 is connected to the output shaft 14 through fasteners and pressed on the pressure plate 8 to achieve the overall positioning of the cutter seat. Further, a connecting seat 11 is fixedly provided on the outer shell, and connecting portions 9 are extended on both sides of the connecting seat 11. The connecting portion 9 is provided with connecting holes 10, which can facilitate the fixing and installation of the cutting knife mechanism on the frame.

[0017] This structure of the utility model provides clearance space by providing front-to-back arc grooves 4 penetrating at the corners of the transmission hole 5, so that when the power shaft is inserted into the transmission hole 5, the corners of the polygonal transmission part of the power shaft are not easy to collide with the transmission hole, making the plug-in connection operation between the power shaft and the transmission hole 5 more convenient and less likely to cause collision, deformation and damage of the components; by directly providing a clamping groove 19 for placing the bearing in the outer shell, the positioning of one side of the bearing 15 can be achieved, replacing the additional end cover structure, making its assembly operation simpler, and when assembling, you can choose to first clamp the bearing 15 into the clamping groove 19 of the outer shell, and then perform the final assembly, which can adapt to some automated installation processes.

Claims

1. A paper cutter mechanism, comprising an outer shell, wherein the outer shell comprises a left outer shell (1) and a right outer shell (2), characterized in that: A first gear (18), a second gear (17) and a third gear (16) are rotatably arranged in the outer shell. The first gear (18) meshes with the second gear (17), and the second gear (17) meshes with the third gear (16). The first gear (18) is connected to the transmission sleeve (3) via a fastener, and the second gear (17) is connected to the support shaft (13). A polygonal transmission hole (5) is opened in the middle of the transmission sleeve (3), and the power shaft can be inserted into the transmission hole (5). The third gear (16) is connected to the transmission sleeve (3) via a fastener. (16) is connected to an output shaft (14), the output shaft (14) is connected to a cutter seat, a circular cutter (6) is arranged on the cutter seat, the transmission hole (5) is provided with a circular arc groove (4) penetrating front and rear at its corner position, a rotating sleeve (12) is integrally provided on the first gear (18), the transmission sleeve (3), the rotating sleeve (12), the support shaft (13) and the output shaft (14) are all sleeved with bearings (15), and a clamping groove (19) for placing the bearing (15) is arranged in the outer shell.

2. A paper cutting mechanism according to claim 1, characterized in that The cutter seat comprises a front seat body (20), one end of the output shaft (14) is provided with a transmission columnar portion (23), the front seat body (20) is provided with a transmission groove (21) for inserting the transmission columnar portion (23), an insertion portion (22) is extended from the front seat body (20), the middle part of the circular cutter (6) has an insertion hole (24) that cooperates with the insertion portion (22), the front seat body (20) is connected to the pressing plate (8) by a fastener, and the circular cutter (6) is pressed between the pressing plate (8) and the front seat body (20).

3. A paper cutting knife mechanism according to claim 1, characterized in that A connecting seat (11) is fixedly provided on the outer shell, connecting parts (9) are extendedly provided on both sides of the connecting seat (11), and connecting holes (10) are provided on the connecting parts (9).

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