A driving mechanism and a knife cutter

Abstract

The utility model discloses a driving mechanism and knife cutting machine. The driving mechanism includes drive subassembly, first transmission component and second transmission component, and drive subassembly includes drive part and drive gear, and drive part is connected with drive gear, and first transmission component includes first incomplete gear, first gear and first rack, and first incomplete gear is connected with drive gear, and first gear is engaged with first rack, and second transmission component includes second incomplete gear, second gear and second rack, and second incomplete gear is connected with drive gear, and second gear is engaged with second rack. The utility model embodiment through two incomplete gear and drive gear's positive and negative rotation can independently control first rack and second rack to the lift of two tool module is independently controlled, and motor cost is reduced, and installation space is reduced, and the whole device is more portable.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, and more particularly to the field of gear transmission technology, specifically to a drive mechanism and a cutting machine. Background Technology

[0002] Currently, when multiple modules need to move independently, a motor is typically configured on each module, and one motor drives one module to achieve movement in one direction. Therefore, in the movement of multiple working modules, multiple motors are required to drive them separately.

[0003] However, this multi-motor drive method causes some problems: 1. Using multiple motors will increase the overall cost; 2. Installing multiple motors requires more installation space; 3. It will make the module heavier. Utility Model Content

[0004] This utility model provides a drive mechanism and a cutting machine, aiming to solve the problems of existing multi-motor drives occupying a large space and having a high cost.

[0005] On the one hand, it is to facilitate independent control of the lifting and lowering of the two external modules through a single motor; The drive mechanism includes: A drive assembly, which includes a drive component and a drive gear, wherein the drive component is connected to the drive gear; The first transmission assembly includes a first incomplete gear, a first gear, and a first rack. The first incomplete gear is connected to the drive gear, and the first gear meshes with the first rack. The second transmission assembly includes a second incomplete gear, a second gear, and a second rack. The second incomplete gear is connected to the drive gear, and the second gear meshes with the second rack. The forward rotation of the drive gear can drive the first incomplete gear to rotate, so that the first incomplete gear meshes with the first gear and drives the first gear to rotate; the reverse rotation of the drive gear can drive the second incomplete gear to rotate, so that the second incomplete gear meshes with the second gear and drives the second gear to rotate.

[0006] The first incomplete gear and the second incomplete gear are respectively located on both sides of the drive gear in the direction of rotation and are arranged symmetrically.

[0007] The drive mechanism also includes a housing, and the drive component, drive gear, first incomplete gear, first gear, second incomplete gear, and second gear are all located inside the housing; The drive mechanism also includes a first shaft mounted on the housing, and a first rack slidably connected to the first shaft; and / or, The drive mechanism also includes a second shaft, which is mounted on the housing, and a second rack is slidably connected to the second shaft.

[0008] Both the first incomplete gear and the first gear are located on the first side in the direction of rotation of the drive gear, and both the second incomplete gear and the second gear are located on the second side in the direction of rotation of the drive gear. The first incomplete gear, the second incomplete gear, and the drive gear are coaxially arranged; and / or, In a direction perpendicular to the axis of rotation of the drive gear, the first rack and the second rack are located on the third and fourth sides of the drive gear, respectively.

[0009] The driving component includes a motor and a transmission component. The transmission component is connected to the output shaft of the motor and meshes with the drive gear.

[0010] On the other hand, in order to achieve the limiting and fixing of the tool module, the drive mechanism also includes a limiting structure. The limiting structure is connected to the drive gear and can move under the drive of the drive gear to limit the movement of the first rack and / or the second rack.

[0011] The limiting structure includes a third transmission component and a limiting member. The third transmission component drives the limiting member and the drive gear. The limiting member can move to a first position and a second position under the drive of the drive gear. When the limiting member is in the first position, the limiting member engages with the first rack to limit the movement of the first rack. When the limiting member is in the second position, the limiting member engages with the second rack to limit the movement of the second rack.

[0012] The third transmission assembly includes a third gear, a fourth gear, and a fifth gear. The limiting member has a rack portion, a first limiting portion, and a second limiting portion. The drive gear is connected to the third gear. The third gear and the fourth gear mesh. The fourth gear and the fifth gear mesh. The fifth gear meshes with the rack portion. The rotation of the fifth gear can drive the limiting member to move and place the limiting member in a first position or a second position. When the limiting member is in the first position, the first limiting portion limits the first rack. When the limiting member is in the second position, the second limiting portion limits the second rack.

[0013] The drive mechanism also includes a housing. The first incomplete gear, the first gear, the drive member, the drive gear, the second incomplete gear, and the second gear are all located on the first side of the housing. The third gear, the fourth gear, the fifth gear, and the limiting member are located on the second side of the housing. The first side and the second side are opposite sides. The first rack includes a first protrusion, and the second rack includes a second protrusion. The housing has a first hole and a second hole that penetrate the first side and the second side. The first protrusion extends through the first hole to the second side, and the second protrusion extends through the second hole to the second side. A first limiting part is used to limit the first protrusion, and a second limiting part is used to limit the second protrusion.

[0014] This application embodiment also provides a knife-cutting machine, the knife-cutting machine including: Mounting base; The aforementioned drive mechanism is mounted on the mounting base; The first tool module is connected to the first rack so that the first tool module moves under the drive of the first rack; The second tool module is connected to the second rack so that the second tool module moves under the drive of the second rack; The motion mechanism is connected to the mounting base and is used to drive the mounting base to move in the horizontal direction.

[0015] In the drive mechanism of this utility model embodiment, when the drive gear rotates forward, it can drive the first incomplete gear to rotate to one side. The first incomplete gear first experiences a period of idle travel before driving the first rack to descend from the highest position, thus realizing the lifting and lowering of the first rack. When the drive gear rotates in reverse, it can drive the first incomplete gear to rotate to the other side, thereby driving the second rack to lift and lower. Through the forward and reverse rotation of the two incomplete gears and the drive gear, the first rack and the second rack can be independently controlled, thereby enabling independent lifting and lowering control of the two external modules connected to the first rack and the second rack. This reduces motor costs, shrinks installation space, and makes the entire device more portable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the front three-dimensional structure provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the rear three-dimensional structure provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the initial state of the drive gear provided in an embodiment of the present invention; Figure 4 This is a side view of the drive gear, the first incomplete gear, and the second incomplete gear provided in the embodiments of this utility model. Figure 5 This is a schematic diagram of the structure of the first rack in the vertical moving state provided in the embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the second rack in the vertical movement state provided in the embodiment of this utility model; Figure 7 This is a schematic diagram of the initial state of the limiting structure provided in the embodiment of this utility model; Figure 8This is a schematic diagram of the first rack unlocked and the second rack locked states provided in the embodiments of this utility model; Figure 9 This is a structural schematic diagram of the first rack locked and the second rack unlocked states provided in the embodiment of this utility model; Figure 10 This is a schematic diagram of the structure of the knife-cutting machine provided in the embodiment of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments 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.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] For details, please refer to Figures 1 to 9 This utility model embodiment provides a drive mechanism for independently controlling the lifting and lowering of two external modules via a single motor.

[0024] The drive mechanism includes a drive assembly, a first transmission assembly, and a second transmission assembly.

[0025] The drive assembly includes a drive component and a drive gear 5, with the drive component connected to the drive gear 5.

[0026] The first transmission assembly includes a first incomplete gear 501, a first gear 4, and a first rack 3. The first incomplete gear 501 is connected to the drive gear 5, and the first gear 4 meshes with the first rack 3.

[0027] In this embodiment, the forward rotation of the drive gear 5 can drive the first incomplete gear 501 to rotate, so that the first incomplete gear 501 meshes with the first gear 4 and drives the first gear 4 to rotate, and the first gear 4 drives the first rack 3 to move up and down.

[0028] The second transmission assembly includes a second incomplete gear 502, a second gear 6, and a second rack 7. The second incomplete gear 502 is connected to the drive gear 5, and the second gear 6 meshes with the second rack 7.

[0029] In this embodiment, the reverse rotation of the drive gear 5 can drive the second incomplete gear 502 to rotate, so that the second incomplete gear 502 meshes with the second gear 6 and drives the second gear 6 to rotate, and the second gear 6 drives the second rack 7 to move up and down.

[0030] In some embodiments, the first incomplete gear 501 and the second incomplete gear 502 are respectively disposed on both sides of the drive gear 5 in the direction of rotation and are symmetrically arranged.

[0031] In this embodiment, the forward rotation of the drive gear 5 can drive the first incomplete gear 501 to first undergo a period of idle travel before meshing with the first gear 4, causing the first gear 4 to rotate. This, in turn, drives the first rack 3 to move vertically, thereby realizing the lifting and lowering motion of the first rack 3. The first rack 3 is connected to the tool module, thus realizing the lifting and lowering of the tool module. The drive gear 5 can rotate clockwise for forward rotation or counterclockwise for reverse rotation.

[0032] For example, such as Figure 3 As shown, the drive gear 5 is in its initial state at this time. The first incomplete gear 501 is not engaged with the first gear 4, and the second incomplete gear 502 is also not engaged with the second gear 6. When the drive gear 5 rotates clockwise, it will cause the first incomplete gear 501 to engage with the first gear 4. When the drive gear 5 rotates counterclockwise, it will cause the second incomplete gear 502 to engage with the second gear 6. Furthermore, the first incomplete gear 501 and the second incomplete gear 502 will not affect each other when the drive gear 5 rotates in both directions.

[0033] The reverse rotation of the drive gear 5 can cause the second incomplete gear 502 to first undergo a period of idling before meshing with the second gear 6, so that the second gear 6 rotates, thereby driving the second rack 7 to move vertically, thus realizing the lifting and lowering movement of the second rack 7. The second rack 7 is connected to another tool module, thereby realizing the lifting and lowering of the other tool module.

[0034] It should be noted that the tool module can be a cutting tool, a pen, an inkjet printhead, etc. Specifically, the two tool modules can be a combination of two cutting tools, one cutting tool and one pen, or one cutting tool and one inkjet printhead, etc., to adapt to processing needs.

[0035] The drive mechanism also includes a housing 1, and the drive component, drive gear 5, first incomplete gear 501, first gear 4, second incomplete gear 502, and second gear 6 are all located inside the housing 1.

[0036] In this embodiment, the drive component, drive gear 5, first incomplete gear 501, first gear 4, second incomplete gear 502, and second gear 6 are integrated and installed inside the housing 1, thereby realizing the modularity of the drive mechanism and facilitating its installation.

[0037] The drive mechanism also includes a first shaft 2, which is mounted on the housing 1, and a first rack 3 is slidably connected to the first shaft 2.

[0038] In this embodiment, the first rack 3 is guided by the first shaft 2, so that it can move up and down vertically along the first shaft 2.

[0039] The drive mechanism also includes a second shaft 8, which is mounted on the housing 1, and a second rack 7 is slidably connected to the second shaft 8.

[0040] In this embodiment, the second rack 7 is guided by the second shaft 8, so that it can move up and down vertically along the second shaft 8.

[0041] The first incomplete gear 501 and the first gear 4 are both located on the first side in the direction of rotation of the drive gear 5, and the second incomplete gear 502 and the second gear 6 are both located on the second side in the direction of rotation of the drive gear 5. The first incomplete gear 501, the second incomplete gear 502 and the drive gear 5 are coaxially arranged.

[0042] In this embodiment, the first incomplete gear 501 and the first gear 4 are located on different sides, which facilitates the first incomplete gear 501 to drive the first gear 4 and the second incomplete gear 502 to drive the second gear 6. The two gears drive each other independently without affecting each other.

[0043] In a direction perpendicular to the rotation axis of the drive gear 5, the first rack 3 and the second rack 7 are located on the third and fourth sides of the drive gear 5, respectively.

[0044] In this embodiment, the first rack 3 and the second rack 7 are respectively disposed on the other two sides, ensuring that while they mesh with the first gear 4 and the second gear 6, they do not affect each other.

[0045] In some embodiments, the driving component includes a motor 9 and a transmission component 10, the transmission component 10 being connected to the output shaft of the motor 9 and meshing with a drive gear 5.

[0046] In this embodiment, the motor 9 can drive the transmission component 10 to rotate, thereby driving the drive gear 5 to rotate. The forward and reverse rotation of the motor 9 can control the lifting and lowering of the two tool modules respectively.

[0047] In some embodiments, in order to limit and fix the tool module after lifting, the drive mechanism further includes a limiting structure, which is connected to the drive gear 5.

[0048] In this embodiment of the application, the limiting structure is movable under the drive of the drive gear 5 to limit the lifting and lowering movement of the first rack 3 and / or the second rack 7.

[0049] In some embodiments, the limiting structure includes a third transmission component and a limiting member 14. The third transmission component is connected to the limiting member 14 and the drive gear 5. The limiting member 14 can move to a first position and a second position under the drive of the drive gear 5.

[0050] In this embodiment of the application, when the limiting member 14 is in the first position, the limiting member 14 cooperates with the first rack 3 to restrict the movement of the first rack 3. When the limiting member 14 is in the second position, the limiting member 14 cooperates with the second rack 7 to restrict the movement of the second rack 7.

[0051] In some embodiments, the third transmission assembly includes a third gear 11, a fourth gear 12, and a fifth gear 13. The limiting member 14 has a rack portion, a first limiting portion, and a second limiting portion. The drive gear 5 is connected to the third gear 11. The third gear 11 meshes with the fourth gear 12. The fourth gear 12 meshes with the fifth gear 13. The fifth gear 13 meshes with the rack portion. The rotation of the fifth gear 13 can drive the limiting member 14 to move so that the limiting member 14 is in a first position or a second position. When the limiting member 14 is in the first position, the first limiting part limits the first rack 3; when the limiting member 14 is in the second position, the second limiting part limits the second rack 7.

[0052] In the embodiments of this application, such as Figure 8 As shown, the motor 9 drives the drive gear 5 to rotate. When the first incomplete gear 501 first goes through a period of idle travel, the third gear 11 drives the fourth gear 12 to rotate. The fourth gear 12 drives the fifth gear 13 to rotate. The fifth gear 13 drives the limiting member 14 to move to the left. The limiting member 14 leaves the first position, and the first limiting part leaves the first rack 3, thereby unlocking the first rack 3. At this time, the first rack 3 can move up and down.

[0053] like Figure 9 As shown, the motor 9 drives the drive gear 5 to rotate in the opposite direction. When the second incomplete gear 502 first goes through a period of idling, the third gear 11 drives the fourth gear 12 to rotate in the opposite direction. The fourth gear 12 drives the fifth gear 13 to rotate in the opposite direction. The fifth gear 13 drives the limiting member 14 to move to the right. The limiting member 14 leaves the second position, and the second limiting part leaves the second rack 7, thereby unlocking the second rack 7. At this time, the second rack 7 can move up and down.

[0054] In addition, such as Figure 7As shown, the limiting member 14 is in its initial state, with its two ends simultaneously locking the first rack 3 and the second rack 7. When the motor 9 drives the limiting member 14 to move laterally, the first incomplete gear 501 and the second incomplete gear 502 idle. Only after the limiting member 14 unlocks the first rack 3 or the second rack 7 will the two incomplete gears mesh with the corresponding gears to control the lifting and lowering of the two tool modules. The limiting structure cooperates with the two incomplete gears to achieve limiting locking when the two tool modules are not lifting or lowering.

[0055] In some embodiments, the first incomplete gear 501, the first gear 4, the driving member, the driving gear 5, the second incomplete gear 502, and the second gear 6 are all disposed on the first side of the housing 1, and the third gear 11, the fourth gear 12, the fifth gear 13, and the limiting member 14 are disposed on the second side of the housing 1. The first side and the second side are opposite sides.

[0056] In this embodiment, the components controlling the lifting and lowering, namely the first incomplete gear 501, the first gear 4, the driving member, the driving gear 5, the second incomplete gear 502, and the second gear 6, are respectively arranged on opposite sides of the third gear 11, the fourth gear 12, the fifth gear 13, and the limiting member 14, so that the two do not affect each other.

[0057] In some embodiments, to facilitate the limiting of the first rack 3 and the second rack 7, the first rack 3 includes a first protrusion, the second rack 7 includes a second protrusion, and the housing 1 has a first hole and a second hole that penetrate the first side and the second side. The first protrusion extends through the first hole to the second side, and the second protrusion extends through the second hole to the second side. The first limiting part is used to limit the first protrusion, and the second limiting part is used to limit the second protrusion.

[0058] In this embodiment, as Figure 8 As shown, when the motor 9 drives the limiting member 14 to move to the left through the drive gear 5, the first incomplete gear 501, the third gear 11, the fourth gear 12, and the fifth gear 13, the limiting member 14 leaves the first position, the first limiting part leaves the first protrusion of the first rack 3, the first protrusion is released from the limit, and the first rack 3 is unlocked.

[0059] like Figure 9 As shown, when the motor 9 drives the limiting member 14 to move to the right through the drive gear 5, the second incomplete gear 502, the third gear 11, the fourth gear 12, and the fifth gear 13, the limiting member 14 leaves the second position, the second limiting part leaves the second protrusion of the second rack 7, the second protrusion is released from the limit, and the second rack 7 is unlocked.

[0060] In some embodiments, the limiting structure includes a linear drive and a limiting rod. The linear drive drives the limiting rod to move laterally, thereby locking and unlocking the first rack 3 or the second rack 7. The linear drive can be a lead screw linear stepper motor.

[0061] In some embodiments, this application provides a knife-cutting machine, which includes a drive mechanism 10, a mounting base 20, a first tool module 30, a second tool module 40, and a motion mechanism 50.

[0062] The drive mechanism 10 can be the drive mechanism described in the above embodiment. The drive mechanism 10 can be installed on the mounting base 20. The first tool module 30 is connected to the first rack 3 so that the first tool module 30 moves under the drive of the first rack 3. The second tool module 40 is connected to the second rack 7 so that the second tool module 40 moves under the drive of the second rack 7. The motion mechanism 50 is connected to the mounting base 20 and is used to drive the mounting base 20 to move in the horizontal direction.

[0063] The drive mechanism 10 can be mounted on the base 20 by means of snap-fit, fastener connection or other methods.

[0064] In this embodiment, the first tool module 30 and the second tool module 40 can be cutting tools, pens, inkjet printheads, etc. Specifically, the two tool modules can be combinations of two cutting tools, one cutting tool and one pen, or one cutting tool and one inkjet printhead, etc., to adapt to processing requirements.

[0065] The motion mechanism 50 can drive the drive mechanism 10 to move in the horizontal direction, thereby causing the first tool module 30 and the second tool module 40 to move accordingly, so as to process the consumables.

[0066] The motion mechanism 50 can be a conventional linear motion module in a cutting machine in related technologies.

[0067] In some examples, the motion mechanism 50 includes a motor, a synchronous belt, and at least two drive pulleys. The synchronous belt is connected to the at least two drive pulleys. The motor can drive one of the drive pulleys to move the synchronous belt. The mounting base can be connected to the synchronous belt to move along the slide rail under the drive of the motion mechanism.

[0068] In some embodiments, the motion mechanism 50 further includes a structure such as a linear motor, which is connected to the mounting base and drives the tool structure to move.

[0069] In some embodiments, the motion mechanism 50 further includes a motor and a lead screw, the lead screw being connected to a mounting base, the motor driving the lead screw to rotate, thereby driving the mounting base to move.

[0070] In other embodiments, the motion mechanism 50 may also be other types of mechanisms.

[0071] In some embodiments, the knife-cutting machine may further include a frame 60, which may include a slide rail 61, and a mounting base 20 may be mounted on the slide rail 61. A motion mechanism 50 may be mounted on the frame 60.

[0072] The driving mechanism and cutting machine provided in this embodiment of the utility model include a driving gear 5, a first transmission component and a second transmission component. When the motor 9 drives the driving gear 5 to rotate forward, it can drive the first incomplete gear 501 to first go through a period of idle stroke before meshing with the first gear 4. The first gear 4 rotates, thereby driving the first rack 3 to rise and fall, that is, realizing the rise and fall of the external module on the first rack 3. When the driving gear 5 rotates in reverse, it will drive the second rack 7 to rise and fall, so that the external module on the second rack 7 can rise and fall.

[0073] This embodiment of the invention achieves independent control of the first rack 3 and the second rack 7 by rotating the two incomplete gears and the drive gear 5 in both directions. This allows for independent control of the lifting and lowering of the two tool modules, reducing motor costs, shrinking installation space, and making the entire device more portable. Furthermore, the drive mechanism is equipped with a limit structure. When the incomplete gears are idling, the limit rod moves laterally to lock one rack and unlock the other, effectively preventing rack displacement due to external force or gravity and improving the lifting stability of the external modules.

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] The above provides a detailed description of the driving mechanism and cutting machine provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solution and core idea of ​​this utility model. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A driving mechanism, characterized in that, include: A drive assembly, the drive assembly including a drive component and a drive gear, the drive component being connected to the drive gear; A first transmission assembly, comprising a first incomplete gear, a first gear, and a first rack, wherein the first incomplete gear is connected to the drive gear, and the first gear meshes with the first rack; The second transmission assembly includes a second incomplete gear, a second gear, and a second rack. The second incomplete gear is connected to the drive gear, and the second gear meshes with the second rack. Wherein, the forward rotation of the drive gear can drive the first incomplete gear to rotate, so that the first incomplete gear meshes with the first gear and drives the first gear to rotate; the reverse rotation of the drive gear can drive the second incomplete gear to rotate, so that the second incomplete gear meshes with the second gear and drives the second gear to rotate.

2. The driving mechanism according to claim 1, characterized in that: The first incomplete gear and the second incomplete gear are respectively disposed on both sides of the drive gear in the direction of rotation and are arranged symmetrically.

3. The driving mechanism according to claim 1, characterized in that: The drive mechanism further includes a housing, and the drive component, the drive gear, the first incomplete gear, the first gear, the second incomplete gear, and the second gear are all disposed inside the housing; The drive mechanism further includes a first shaft, which is mounted on the housing, and the first rack is slidably connected to the first shaft; And / or, The drive mechanism further includes a second shaft, which is mounted on the housing, and the second rack is slidably connected to the second shaft.

4. The driving mechanism according to claim 3, characterized in that: The first incomplete gear and the first gear are both located on a first side in the rotational direction of the drive gear, and the second incomplete gear and the second gear are both located on a second side in the rotational direction of the drive gear. The first incomplete gear, the second incomplete gear, and the drive gear are coaxially arranged; and / or, In a direction perpendicular to the axis of rotation of the drive gear, the first rack and the second rack are located on the third and fourth sides of the drive gear, respectively.

5. The driving mechanism according to claim 1, characterized in that: The driving component includes a motor and a transmission component, the transmission component is connected to the output shaft of the motor, and the transmission component meshes with the driving gear.

6. The driving mechanism according to claim 1, characterized in that, The driving mechanism further includes a limiting structure connected to the driving gear. The limiting structure is movable under the drive of the driving gear to restrict the movement of the first rack and / or the second rack.

7. The driving mechanism according to claim 6, characterized in that, The limiting structure includes a third transmission component and a limiting member. The third transmission component drives the limiting member to the drive gear. The limiting member can move to a first position and a second position under the drive of the drive gear. When the limiting member is in the first position, it engages with the first rack to restrict the movement of the first rack. When the limiting member is in the second position, it engages with the second rack to restrict the movement of the second rack.

8. The driving mechanism according to claim 7, characterized in that: The third transmission assembly includes a third gear, a fourth gear, and a fifth gear. The limiting member has a rack portion, a first limiting portion, and a second limiting portion. The drive gear is connected to the third gear. The third gear meshes with the fourth gear, the fourth gear meshes with the fifth gear, and the fifth gear meshes with the rack portion. The rotation of the fifth gear can drive the limiting member to move, causing the limiting member to be in the first position or the second position. When the limiting member is in the first position, the first limiting portion limits the first rack. When the limiting member is in the second position, the second limiting portion limits the second rack.

9. The driving mechanism according to claim 8, characterized in that: The drive mechanism further includes a housing. The first incomplete gear, the first gear, the drive member, the drive gear, the second incomplete gear, and the second gear are all disposed on the first side of the housing. The third gear, the fourth gear, the fifth gear, and the limiting member are disposed on the second side of the housing. The first side and the second side are opposite sides. The first rack includes a first protrusion, and the second rack includes a second protrusion. The housing has a first hole and a second hole that penetrate the first side and the second side. The first protrusion extends through the first hole to the second side, and the second protrusion extends through the second hole to the second side. The first limiting part is used to limit the first protrusion, and the second limiting part is used to limit the second protrusion.

10. A knife-cutting machine, characterized in that, The cutting machine includes: Mounting base; The drive mechanism as described in any one of claims 1 to 9, wherein the drive mechanism is mounted on the mounting base; A first tool module is connected to the first rack so that the first tool module moves under the drive of the first rack; The second tool module is connected to the second rack so that the second tool module moves under the drive of the second rack; A motion mechanism, which is connected to the mounting base, is used to drive the mounting base to move in a horizontal direction.

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