A transmission assembly, a driving mechanism and a cup bottom cutting device

Abstract

The present application relates to a transmission assembly, a driving mechanism and a cup bottom cutting device, wherein the transmission assembly comprises a first transmission shaft and a second transmission shaft arranged at intervals, a first crank and two second cranks, the first crank is rotatably connected to the first transmission shaft for driving the head assembly to move vertically, the two second cranks are symmetrically arranged on both sides of the first crank, and the second crank is rotatably connected to the second transmission shaft for driving the ring knife assembly to move vertically. The force transmission path of the two second cranks and the ring knife assembly is optimized by symmetrically arranging the two second cranks, so that the transmission assembly will not tilt when driving the ring knife assembly to move vertically, and the ring knife assembly is prevented from being damaged by bending or scratching with the surrounding limit members.

Description

Technical Field

[0001] The utility model relates to the technical field of paper cup production, in particular to a transmission component, a driving mechanism and a cup bottom cutting device. Background Art

[0002] In the automated production of paper cups, before the bottom of the cup is sealed, a cup bottom knife mechanism is required to cut the conveyed paper strip into circular paper pieces and push them into the cylindrical paper cup semi-finished product. It generally includes a ring knife assembly and a top head assembly located in the ring knife assembly. The ring knife assembly and the top head assembly are respectively connected to the drive assembly by two drive rods. The existing drive assembly generally uses a plurality of coaxial eccentric wheels to drive them separately. Such eccentric wheels require a large volume, and are troublesome to disassemble and assemble, and have high costs. There are also two drive assemblies to drive these two assemblies separately. The two drive assemblies are respectively located on both sides of the cup bottom knife. Due to the limited space at the cup bottom knife, a horizontal extension rod connected to the transmission rod is also required. The horizontal extension rod is used for transmission connection with the drive assembly, which makes it easy for the cup bottom knife or the top head assembly to be eccentric when moving vertically, that is, the transmission rod tilts to one side when cutting paper, which is easy to be damaged. Utility Model Content

[0003] In view of the shortcomings of the existing cup bottom cutting equipment, such as large space occupied and easy damage of the transmission rod, it is necessary to provide a transmission assembly, a driving mechanism and a cup bottom cutting equipment.

[0004] A transmission assembly, used to connect a head assembly and a ring knife assembly of a cup bottom knife mechanism to two servo motors respectively, comprising:

[0005] A first transmission shaft and a second transmission shaft are arranged at intervals, wherein the first transmission shaft and the second transmission shaft are respectively transmission-connected to two servo motors;

[0006] A first crank, the first crank is rotatably connected to the first transmission shaft for driving the head assembly to move vertically; and

[0007] Two second cranks are symmetrically arranged on both sides of the first crank, and the second cranks are rotatably connected to the second transmission shaft to drive the ring knife assembly to move vertically.

[0008] Such an arrangement optimizes the force transmission path of the two second cranks and the ring knife assembly by symmetrically arranging the two second cranks, so that the transmission assembly will not tilt when driving the ring knife assembly to move vertically, thereby preventing the ring knife assembly from bending or being damaged by scratches with surrounding limit members.

[0009] In one of the embodiments, at least one of the second cranks is provided with a clearance hole, the first transmission shaft is movably inserted into the clearance hole, and the first transmission shaft and the second transmission shaft are arranged in parallel in the vertical direction.

[0010] With such arrangement, the space occupied by the transmission assembly is reduced, thereby reducing the space occupied by the entire paper cup production equipment.

[0011] In one embodiment, the first transmission shaft includes a first shaft body and a mounting ring fixedly connected to an end of the first shaft body, and the first crank is fixedly connected to a side of the mounting ring away from the shaft body.

[0012] With such arrangement, the size of the end of the first transmission shaft is enlarged by the mounting ring, thereby facilitating the mounting of the first crank.

[0013] In one embodiment, the second transmission shaft includes a second shaft and an eccentric wheel fixedly connected to the second shaft, and the second crank is rotatably sleeved on the eccentric wheel.

[0014] With such arrangement, the eccentric wheel and the second crank are tightly matched and will not get loose, which is beneficial to improving the accuracy of transmission matching.

[0015] In one embodiment, the second crank includes a handle head rotatably mounted on the second transmission shaft and a handle body telescopically mounted on the handle head, and the handle body is used for transmission connection to the ring knife assembly.

[0016] With such arrangement, the handle body can be adjusted relative to the handle head, thereby eliminating assembly errors of the ring knife assembly and preventing the ring knife assembly from getting stuck when mating with surrounding components.

[0017] The present application also provides a driving mechanism, comprising:

[0018] Mounting frame;

[0019] A transmission assembly as described above, wherein the transmission assembly is mounted on the mounting frame; and

[0020] Two servo motors, the servo motors respectively drive a first transmission shaft and a second transmission shaft connected to the transmission assembly.

[0021] With this arrangement, the transmission components are driven separately by two servo motors, which facilitates the debugging of the movement timing of the ring knife assembly and the head assembly.

[0022] In one of the embodiments, the mounting frame includes a base plate and a plurality of transmission shaft brackets spaced apart from each other on the base plate, and the first transmission shaft and the second transmission shaft are rotatably mounted on the transmission shaft brackets, respectively.

[0023] With such arrangement, the relative position between the first transmission shaft and the second transmission shaft is stable, and the rotation is smooth and not prone to shaking.

[0024] In one embodiment, the driving mechanism further includes a motor bracket located at one side of the mounting frame, and the two servo motors are respectively mounted on the motor bracket.

[0025] Such an arrangement facilitates debugging and maintenance, and is also conducive to realizing the functional partitioning of the cup bottom cutting equipment.

[0026] In one embodiment, the transmission shaft bracket includes a frame body and a bearing fixedly connected to the frame body, and the first transmission shaft and the second transmission shaft are respectively inserted into the bearings.

[0027] Such an arrangement is conducive to improving the smoothness of the rotation of the first transmission shaft and the second transmission shaft, and ensuring the smooth operation of the drive mechanism.

[0028] The present application also provides a cup bottom cutting device, comprising:

[0029] A support frame, wherein the support frame has a cutting channel;

[0030] A ring cutter assembly and a mandrel assembly respectively mounted on the support frame; and

[0031] As mentioned above, the driving mechanism is drivably connected to the circular knife assembly to drive the circular knife assembly to cut the paper sheet in the cutting channel so that the paper sheet forms a cup bottom cover, and the driving mechanism is drivably connected to the top head assembly to push the cut cup bottom cover out of the cutting channel.

[0032] With such arrangement, the use of the driving mechanism provided by the present application enables the cup bottom cutting device to operate more smoothly and have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A partial cross-sectional view of a cup bottom cutting device provided in the present application;

[0034] Figure 2 for Figure 1 A cross-sectional view of the cup bottom cutting device at the first crank is shown.

[0035] Reference numerals:

[0036] 10. First transmission shaft; 11. First shaft body; 12. Mounting ring; 13. First coupling; 20. Second transmission shaft; 21. Second shaft body; 22. Eccentric wheel; 23. Second coupling; 30. First crank; 40. Second crank; 401. Clearance hole; 41. Handle head; 42. Handle body; 50. Mounting frame; 51. Bottom plate; 52. Transmission shaft bracket; 521. Frame; 522. Bearing; 53. Motor bracket; 60. Servo Motor; 70, support frame; 701, cutting channel; 71, bearing seat; 80, ring knife assembly; 81, upper mold frame; 8101, first through hole; 8102, first positioning hole; 82, lower mold frame; 8201, second through hole; 8202, second positioning hole; 821, mounting plate; 822, bushing; 823, connecting rod; 83, dust shield ring plate; 84, guide column and guide sleeve assembly; 90, jack assembly; 91, jack block; 92, jack shaft. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] In the automated production of paper cups, before the bottom of the cup is sealed, a cup bottom knife mechanism is required to cut the conveyed paper strip into circular paper pieces and push them into the cylindrical paper cup semi-finished product. It generally includes a ring knife assembly and a top head assembly located in the ring knife assembly. The ring knife assembly and the top head assembly are respectively connected to the drive assembly by two drive rods. The existing drive assembly generally uses a plurality of coaxial eccentric wheels to cooperate with the drive rod to drive them separately. Such eccentric wheels need to occupy a large volume, and are troublesome to disassemble and assemble, and have high costs. There are also two drive assemblies to drive these two assemblies separately. The two drive assemblies are respectively located on both sides of the cup bottom knife. Due to the limited space at the cup bottom knife, a horizontal extension rod connected to the transmission rod is also required. The horizontal extension rod is used for transmission connection with the drive assembly, which makes it easy for the cup bottom knife or the top head assembly to be eccentric when moving vertically, that is, the transmission rod tilts to one side when cutting paper, which is easy to be damaged.

[0044] Based on this, it is necessary to provide a transmission component, a drive mechanism and a cup bottom cutting device that occupy a small space and have a long service life.

[0045] See also Figure 1 and Figure 2 , Figure 1 A partial cross-sectional view of a cup bottom cutting device in an embodiment of the utility model is shown. Figure 2 for Figure 1 The cup bottom cutting device is shown in a cross-sectional view at the first crank 30 .

[0046] The transmission assembly provided by the present application includes a first transmission shaft 10 and a second transmission shaft 20 arranged at intervals, a first crank 30 and two second cranks 40, the first crank 30 is rotatably connected to the first transmission shaft 10 for driving the head assembly 90 to move vertically, the two second cranks 40 are symmetrically arranged on both sides of the first crank 30, and the second crank 40 is rotatably connected to the second transmission shaft 20 for driving the ring knife assembly 80 to move vertically. By symmetrically arranging the two second cranks 40, the force transmission path of the two second cranks 40 and the ring knife assembly 80 is optimized, so that the transmission assembly will not tilt when driving the ring knife assembly 80 to move vertically, and the ring knife assembly 80 is prevented from being bent or scratched with the surrounding limit members and damaged.

[0047] Furthermore, in order to further reduce the occupied volume of the cup bottom cutting device, in one embodiment provided in the present application, at least one second crank 40 is provided with a clearance hole 401, and the first transmission shaft 10 can be movably inserted into the clearance hole 401, and the first transmission shaft 10 and the second transmission shaft 20 are arranged in parallel in the vertical direction. Due to the provision of the clearance hole 401, the first transmission shaft 10 and the second transmission shaft 20 can be arranged in parallel, so that the occupied space of the transmission assembly can be reduced, thereby reducing the occupied space of the entire paper cup production equipment. As shown in the figure, the first transmission shaft 10 is located above the second transmission shaft 20. It can be understood that in other embodiments, the first transmission shaft 10 can also be located below the second transmission shaft 20. In this embodiment, the clearance hole 401 can be adaptively opened in the first crank 30 to allow the second transmission shaft 20 to pass through.

[0048] Specifically, Figure 1 As shown, in one embodiment provided by the present application, the first transmission shaft 10 includes a first shaft body 11 and a mounting ring 12 fixedly connected to the end of the first shaft body 11, and the first crank 30 is fixedly connected to the side of the mounting ring 12 away from the shaft body. The mounting ring 12 enlarges the size of the end of the first transmission shaft 10, making it easier to install the first crank 30.

[0049] Specifically, Figure 1As shown, in one embodiment provided in the present application, the second transmission shaft 20 includes a second shaft body 21 and an eccentric wheel 22 fixedly connected to the second shaft body 21, and the second crank 40 is rotatably mounted on the eccentric wheel 22. The eccentric wheel 22 rotates eccentrically around the second shaft body 21 to drive one end of the second crank 40 connected to the ring knife assembly 80 to move vertically. The eccentric wheel 22 and the second crank 40 fit tightly and will not get loose, which is beneficial to improving the accuracy of transmission matching.

[0050] Further, in an embodiment provided by the present application, the second crank 40 includes a handle head 41 rotatably mounted on the second transmission shaft 20 and a handle body 42 telescopically mounted on the handle head 41, and the handle body 42 is used for transmission connection with the ring knife assembly 80. In this way, the handle body 42 can be adjusted relative to the handle head 41, which can eliminate the assembly error of the ring knife assembly 80 and prevent the ring knife assembly 80 from getting stuck when cooperating with surrounding components.

[0051] The present application also provides a driving mechanism, including a mounting frame 50, two servo motors 60 and a transmission assembly as described above, wherein the transmission assembly and the two servo motors 60 are respectively mounted on the mounting frame 50, and the two servo motors 60 respectively drive the first transmission shaft 10 and the second transmission shaft 20 connected to the transmission assembly. The two servo motors 60 drive the transmission assembly respectively, which facilitates the debugging of the movement timing of the ring knife assembly 80 and the head assembly 90. Specifically, the mounting frame 50 includes a base plate 51 and a plurality of transmission shaft brackets 52 arranged at intervals on the base plate 51, and the first transmission shaft 10 and the second transmission shaft 20 are rotatably mounted on the transmission shaft brackets 52, so that the relative position between the first transmission shaft 10 and the second transmission shaft 20 is stable, and the rotation is stable and not easy to shake. In order to improve the transmission connection performance between the first transmission shaft 10 and the second transmission shaft 20 and the servo motor 60, a first coupling 13 is provided at one end of the first transmission shaft 10 connected to the servo motor 60, and a second coupling 23 is provided at one end of the second transmission shaft 20 connected to the servo motor 60.

[0052] Optionally, in an embodiment provided in the present application, the driving mechanism further includes a motor bracket 53 located on one side of the mounting frame 50, and two servo motors 60 are respectively mounted on the motor bracket 53. The two servo motors 60 are arranged on the same side, which facilitates debugging and maintenance, and is also conducive to realizing the functional partitioning of the cup bottom cutting device.

[0053] Optionally, in an embodiment provided in the present application, the transmission shaft bracket 52 includes a frame body 521 and a bearing 522 fixedly connected to the frame body 521, and the first transmission shaft 10 and the second transmission shaft 20 are respectively passed through the bearing 522. This is conducive to improving the smoothness of the rotation of the first transmission shaft 10 and the second transmission shaft 20, and ensuring the smooth operation of the driving mechanism.

[0054] The present application also provides a cup bottom cutting device, comprising a support frame 70, a ring knife assembly 80, a head assembly 90 and a driving mechanism as described above. Specifically, the support frame 70 has a horizontal cutting channel 701 for a paper strip to pass through, the ring knife assembly 80 and the head assembly 90 are respectively installed on the support frame 70, the driving mechanism is driven and connected to the ring knife assembly 80 so that the paper sheet is cut into the shape of a ring cutting hole by the ring knife assembly 80, and the driving mechanism is also driven and connected to the head assembly 90 so that the cup bottom cover is pushed out of the forming hole.

[0055] Specifically, the ring knife assembly 80 includes an upper mold frame 81 and a lower mold frame 82 arranged at intervals, a first ring knife fixed to the upper mold frame 81, and a second ring knife fixed to the lower mold frame 82. The upper mold frame 81 is fixedly connected to the support frame 70, and the lower mold frame 82 is movably arranged below the upper mold frame 81. The upper mold frame 81 has a first through hole 8101, and the lower mold frame 82 has a second through hole 8201 corresponding to the first through hole 8101. The head assembly 90 is movably inserted into the first through hole 8101 and the second through hole 8201. In order to simplify the schematic diagram, Figure 1 In the figure, only the first positioning hole 8102 for installing the first circular cutter is shown in the upper mold frame 81, and the second positioning hole 8202 for installing the second circular cutter is shown in the lower mold frame 82. The two circular cutters are used to cut the paper into a circular cup bottom. In order to make the first circular cutter and the second circular cutter fit closely, the circular cutter assembly 80 also includes a guide column and guide sleeve assembly 84 located between the upper mold frame 81 and the lower mold frame 82.

[0056] Specifically, the lower die frame 82 includes a mounting plate 821, a sleeve 822, and a connecting rod 823. The mounting plate 821 and the sleeve 822 are arranged at intervals, and the two ends of the connecting rod 823 are fixedly connected to the mounting plate 821 and the sleeve 822, respectively. The bottom end of the sleeve 822 is transmission-connected to the second crank 40 of the transmission assembly. The top head assembly 90 includes a top head block 91 and a top shaft 92. The top shaft 92 is inserted into the sleeve 822 of the lower die frame 82. The top head block 91 is movably inserted into the first through hole 8101 and the second through hole 8201. The bottom end of the top shaft 92 is transmission-connected to the first crank 30 of the transmission assembly. In order to prevent debris generated during the cutting process from entering between the top shaft 92 and the sleeve 822, the ring knife assembly 80 also includes a dust shielding ring plate 83 covering the sleeve 822. In order to ensure that the lower mold frame 82 moves more smoothly in the vertical direction, the support frame 70 is also fixed with a bearing 522 seat, and the shaft sleeve 822 is slidably inserted into the bearing 522 seat.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A transmission assembly, used to connect a head assembly (90) and a ring knife assembly (80) of a cup bottom knife mechanism to two servo motors (60), respectively, characterized in that: include: A first transmission shaft (10) and a second transmission shaft (20) are arranged at intervals, wherein the first transmission shaft (10) and the second transmission shaft (20) are respectively transmission-connected to two servo motors (60); A first crank (30), the first crank (30) being rotatably connected to the first transmission shaft (10) and used for driving the head assembly (90) to move vertically; as well as Two second cranks (40) are symmetrically arranged on both sides of the first crank (30), and the second cranks (40) are rotatably connected to the second transmission shaft (20) to drive the ring knife assembly (80) to move vertically.

2. A transmission assembly according to claim 1, characterized in that: At least one of the second cranks (40) is provided with a clearance hole (401), the first transmission shaft (10) is movably inserted into the clearance hole (401), and the first transmission shaft (10) and the second transmission shaft (20) are arranged in parallel in the vertical direction.

3. A transmission assembly according to claim 1, characterized in that: The first transmission shaft (10) comprises a first shaft body (11) and a mounting ring (12) fixedly connected to the end of the first shaft body (11), and the first crank (30) is fixedly connected to a side of the mounting ring (12) away from the shaft body.

4. A transmission assembly according to claim 1, characterized in that: The second transmission shaft (20) comprises a second shaft body (21) and an eccentric wheel (22) fixedly connected to the second shaft body (21), and the second crank (40) is rotatably sleeved on the eccentric wheel (22).

5. A transmission assembly according to claim 4, characterized in that: The second crank (40) comprises a handle head (41) rotatably mounted on the second transmission shaft (20) and a handle body (42) telescopically mounted on the handle head (41), wherein the handle body (42) is used for transmission connection to the ring knife assembly (80).

6. A driving mechanism, characterized in that: include: Mounting bracket(50) ； A transmission assembly according to any one of claims 1 to 5, wherein the transmission assembly is mounted on the mounting frame (50); and Two servo motors (60), the servo motors (60) respectively driving a first transmission shaft (10) and a second transmission shaft (20) connected to the transmission assembly.

7. A driving mechanism according to claim 6, characterized in that: The mounting frame (50) comprises a base plate (51) and a plurality of transmission shaft brackets (52) arranged at intervals on the base plate (51); the first transmission shaft (10) and the second transmission shaft (20) are respectively rotatably mounted on the transmission shaft brackets (52).

8. A driving mechanism according to claim 6, characterized in that: The driving mechanism further comprises a motor bracket (53) located on one side of the mounting frame (50), and the two servo motors (60) are respectively mounted on the motor bracket (53).

9. A driving mechanism according to claim 7, characterized in that: The transmission shaft bracket (52) comprises a frame body (521) and a bearing (522) fixedly connected to the frame body (521), and the first transmission shaft (10) and the second transmission shaft (20) are respectively inserted into the bearing (522).

10. A cup bottom cutting device, characterized in that: include: A support frame (70), wherein the support frame (70) has a cutting channel (701); A ring cutter assembly (80) and a mandrel assembly (90) respectively mounted on the support frame (70); and A driving mechanism as described in any one of claims 6 to 9, wherein the driving mechanism is drivably connected to the ring knife assembly (80) for driving the ring knife assembly (80) to cut the paper sheet in the cutting channel (701) so that the paper sheet forms a cup bottom cover, and the driving mechanism is drivably connected to the top head assembly (90) for pushing the cut cup bottom cover out of the cutting channel (701).

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