Spliced bean cutting mechanism applying angular contact bearing
By using angular contact bearings to rotate and support the spindle in the bean cutting equipment, the problem of bearing slippage and runout during high-speed rotation is solved, achieving high-precision and high-efficiency bean cutting and ensuring the consistency of bean size and the flatness of the cut.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 李强
- Filing Date
- 2026-03-19
- Publication Date
- 2026-04-24
AI Technical Summary
In existing bean cutting equipment, the bearings have large axial movement and radial runout when rotating at high speed, resulting in uneven bean sizes, burrs on the cut edges, and poor stability, which cannot meet the production requirements of high precision and high efficiency.
Angular contact bearings are used to provide rotational support for the spindle. These bearings are installed face-to-face, back-to-back, or in series to withstand radial and axial loads, suppress spindle movement and runout, and ensure cutting accuracy and stability.
It achieves high-precision and high-efficiency production of Perler beads cutting, with consistent bean size, smooth cuts, low defect rate, wear-resistant cutting disc, and good cutting stability.
Smart Images
Figure CN121912445A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of polymer tube cutting, and in particular to a bean cutting mechanism using angular contact bearings. Background Technology
[0002] Perler beads, also known as pixel art, are colorful little beads that can be used to create flat patterns or three-dimensional sculptures. It's a puzzle craft that allows for the realization of many creative ideas. This flexible and diverse crafting method doesn't restrict you to patterns; players can freely unleash their imagination and creativity by placing 2.6mm or 5mm plastic tubes on various shaped templates to form their desired designs. Then, they can use a small iron to flatten the assembled pattern, and the melted plastic tubes connect to form a flat decorative object.
[0003] The formation of individual beads in Perler beads is generally achieved through injection molding or by cutting a long plastic tube into multiple beads of uniform length. Since a single set of Perler beads requires a large number of beads, injection molding is too inefficient and generally not used. To improve efficiency, automated plastic tube cutting machines are now available to cut plastic tubes into multiple beads. Currently, plastic tube cutting typically involves a motor-driven spindle that rotates a high-speed cutter head fixed to the spindle, causing blades on the cutter head to continuously cut the plastic tube to form beads. However, because the bearings supporting the spindle are deep groove ball bearings or sliding bearings, they experience significant axial and radial runout and insufficient rigidity during high-speed cutting. This results in uneven bead sizes, burrs on the cut edges, easy blade wear, and poor stability, failing to meet the demands of high-precision, high-efficiency production. Summary of the Invention
[0004] To address the aforementioned problems, this invention proposes a bean cutting mechanism that utilizes angular contact bearings.
[0005] The technical solution adopted in this invention is: a bean-shaped cutting mechanism using angular contact bearings, installed on the frame of a plastic pipe cutting machine. The frame is provided with a feeding mechanism for continuously conveying plastic pipes, and a mounting frame for mounting the bean-shaped cutting mechanism. The mounting frame includes at least a first bracket and a second bracket mounted on the frame. The second bracket has a guide seat for one end of the plastic pipe to pass through. The bean-shaped cutting mechanism includes: The drive device includes a drive motor mounted on the frame or the first bracket, and a main shaft linked to the drive motor. At least two angular contact bearings are mounted on the first bracket and the second bracket, and the main shaft passes through all of the angular contact bearings. The cutting disc, fixedly mounted on the main shaft, is used to cut the plastic tubes output from the guide seat at intervals and form beads.
[0006] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.
[0007] Preferably, there are two angular contact bearings, which are respectively mounted on the first bracket and the second bracket, and the two angular contact bearings are mounted face to face.
[0008] Preferably, there are two angular contact bearings, which are respectively mounted on the first bracket and the second bracket, and the two angular contact bearings are mounted back to back.
[0009] Preferably, at least two of the angular contact bearings are mounted in series on the first bracket or the second bracket.
[0010] Preferably, a coupling is mounted on the motor shaft of the drive motor, one end of the main shaft is fixed on the coupling, and a shrink sleeve is mounted on the main shaft. The shrink sleeve is arranged on one side of the fly cutter disc and is used to fix the fly cutter disc on the main shaft.
[0011] Preferably, the first bracket and / or the second bracket are provided with bearing seats for mounting the angular contact bearing.
[0012] Preferably, the first bracket and / or the second bracket are provided with end caps for covering the angular contact bearing, the end caps being disposed on one side of the angular contact bearing.
[0013] Preferably, the frame is provided with at least one first slide rail extending along its length, the lower end of the first bracket is provided with a first slider for slidingly connecting to the first slide rail, the lower end of the second bracket is provided with a second slider for slidingly connecting to the first slide rail, and a connecting rod is provided between the first bracket and the second bracket.
[0014] Preferably, the feeding mechanism includes a first feeding component and a second feeding component arranged in a front-to-back alignment, wherein the first feeding component includes: A first motor base is mounted on the frame and is used to mount the first motor, with a lower roller connected to the motor shaft of the first motor; The second feeding assembly includes: The second motor base is mounted on the frame and is used to mount the second motor. An upper roller is connected to the motor shaft of the second motor. The upper roller and the lower roller are arranged vertically opposite each other. The plastic tube passes between the lower roller and the upper roller.
[0015] More preferably, the guide seat is provided with a guide hole for the plastic tube to pass through, the edge of the flying knife disc is provided with a plurality of blades evenly spaced along its circumference, and the guide seat is provided with a knife groove for the blades to extend into.
[0016] Compared with the prior art, the present invention has the following beneficial effects: By installing at least two angular contact bearings on the mounting bracket to provide rotational support for the main shaft, during the high-speed rotation of the main shaft driven by the drive motor through the coupling, the at least two angular contact bearings, installed in a face-to-face, back-to-back, or series configuration, can simultaneously withstand radial and axial loads, suppressing spindle runout and vibration. This effectively ensures the cutting accuracy of the beads, resulting in all beads having essentially the same size, minimal cutting error, and smooth cuts without burrs. This leads to a low defect rate, excellent cutting stability, and reduced wear on the cutter disc, meeting the demands of high-precision and high-efficiency production. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a right-side view of the assembly structure of the frame, mounting bracket, and bead cutting mechanism in one embodiment of this application; Figure 2 This is a left-side view of the assembly structure of the frame, mounting bracket, and bean cutting mechanism in one embodiment of this application; Figure 3 for Figure 2 Enlarged view of part A in the image; Figure 4 This is a hidden drive motor in one embodiment of the present application, and a left-side view of the assembly structure of the frame, mounting frame and bean cutting mechanism after the first end cap is exploded and separated. Figure 5 This is an assembly diagram of the main shaft and its mounting structure after the second end cap has been explosively separated, according to one embodiment of this application. Figure 6This is an assembly structure diagram of the main shaft and its mounting structure after the first end cap has been explosively separated in one embodiment of this application; Figure 7 This is a first-view overall structural diagram of a plastic pipe cutting machine involved in one embodiment of this application; Figure 8 This is a second-view overall structural diagram of the plastic pipe cutting machine involved in one embodiment of this application; Figure 9 This is a schematic diagram of the feeding mechanism in one embodiment of this application.
[0019] The components in the attached diagram are labeled as follows: 1-Frame, 11-First slide rail, 2-Mounting bracket, 2-Mounting bracket, 21-First support, 211-First slider, 22-Second support, 221-Second slider, 23-Connecting rod, 3-Drive device, 31-Outer casing, 32-Drive motor, 33-Main shaft, 34-Expansion sleeve, 4-Flying cutter disc, 5-First bearing, 51-First end cover, 6-Second bearing, 61-Second end cover, 7-First feeding assembly, 71-First motor base, 72-First motor, 73-Lower roller, 731-First groove, 8-Second feeding assembly, 81-Upright frame, 811-Second slide rail, 82-Lifting plate, 821-Third slider, 83-Second motor, 84-Upper roller, 841-Second groove, 9-Guide seat, 91-Guide hole, 92-Knife groove, 10-Unloading rack.
[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.
[0024] Detailed implementation plan: See below Figures 1-9 This invention relates to a bean cutting mechanism using angular contact bearings, mounted on the frame 1 of a plastic pipe cutter. The frame 1 is equipped with a feeding mechanism for continuously conveying plastic pipes, and a mounting frame 2 for mounting the bean cutting mechanism. The mounting frame 2 includes at least a first bracket 21 and a second bracket 22 mounted on the frame 1. The second bracket 22 has a guide seat 9 for one end of the plastic pipe to pass through. The bean cutting mechanism includes: The drive unit 3 includes a drive motor 32 mounted on the frame 1 or the first bracket 21, and a main shaft 33 linked to the drive motor 32. At least two angular contact bearings are mounted on the first bracket 21 and the second bracket 22, and the main shaft 33 passes through all the angular contact bearings. The flying cutter disc 4 is fixedly mounted on the main shaft 33 and is used to cut the plastic tube output from the guide seat 9 at intervals to form a bead.
[0025] In this embodiment, the angular contact bearings on the spindle 33 can be installed face-to-face, back-to-back, or in series.
[0026] When using face-to-face and back-to-back installation methods, a total of two angular contact bearings can be installed on the main shaft 33. One angular contact bearing is installed on the first bracket 21, and the other angular contact bearing is installed on the second bracket 22 (for ease of understanding, in this embodiment, the angular contact bearing installed on the first bracket is named the first bearing 5, and the angular contact bearing installed on the second bracket is named the second bearing 6). The two angular contact bearings work together to simultaneously bear radial and axial loads, suppressing the axial movement and runout of the main shaft 33. The high-speed rotation of the main shaft 33 is more stable, which in turn allows the cutter disc 4 to accurately cut plastic tubes. The resulting beads are of basically consistent size, with small cutting errors, and the cut edges of the beads are smooth without burrs, resulting in a low defect rate and excellent cutting stability.
[0027] In practical applications, multiple angular contact bearings can also be installed in a series of pairs. In this method, multiple angular contact bearings can be installed on the first bracket 21 or the second bracket 22, and the multiple angular contact bearings are pre-tightened by pre-tightening spacers, which can effectively prevent radial and axial displacement of the spindle 33 during high-speed rotation, thereby improving rigidity and cutting accuracy.
[0028] Then, please see Figure 2 and Figure 5 As can be seen in this embodiment, a coupling (not shown in the figure) is installed on the motor shaft of the drive motor 32, one end of the main shaft 33 is fixed on the coupling, and a shrinking sleeve 34 is installed on the main shaft 33. The shrinking sleeve 34 is arranged on one side of the fly cutter disc 4 and is used to fix the fly cutter disc 4 on the main shaft 33.
[0029] Here, the coupling allows the drive motor 32 to more stably drive the drive spindle 33 to rotate at high speed. In this embodiment, the drive motor 32 is mounted on the frame 1 via a motor mount, and the expansion sleeve 34 ensures that the fly cutter disc 4 is securely mounted on the spindle 33. Furthermore, in this embodiment, to enhance aesthetics and protect the coupling, an outer cover 31 is fixedly mounted on one side of the first bracket 21, covering the outside of the coupling.
[0030] Next, to facilitate the installation of angular contact bearings, in this embodiment, the first bracket 21 and / or the second bracket 22 are provided with bearing seats for the installation of angular contact bearings.
[0031] In addition, please see Figure 5 , Figure 6 and Figure 8 As can be seen, in this embodiment, the first bracket 21 and / or the second bracket 22 are provided with end caps for covering the angular contact bearing, and the end caps are arranged on one side of the angular contact bearing.
[0032] When angular contact bearings are installed on both the first bracket 21 and the second bracket 22, the end cover installed on the first bracket 21 is designated as the first end cover 51, and the end cover installed on the second bracket 22 is designated as the second end cover 61. Both the first end cover 51 and the second end cover 61 are arranged on one side of the angular contact bearing.
[0033] Here, the first end cover 51 and the second end cover 61 are provided to effectively protect the angular contact bearing and ensure that the angular contact bearing is stably installed on the bearing housing.
[0034] Then, please see Figures 7-9As can be seen, in this embodiment, the frame 1 is provided with at least one first slide rail 11 extending along the longitudinal direction, the lower end of the first bracket 21 is provided with a first slider 211 for sliding connection with the first slide rail 11, the lower end of the second bracket 22 is provided with a second slider 221 for sliding connection with the first slide rail 11, and a connecting rod 23 is provided between the first bracket 21 and the second bracket 22.
[0035] Here, since a connecting rod 23 is provided between the first bracket 21 and the second bracket 22, the first bracket 21, the connecting rod 23 and the second bracket 22 are equivalent to forming a whole. Since the first bracket 21 is installed on the first slide rail 11 through the second slider 221 and the second bracket 22 is installed on the first slide rail 11 through the third slider 821, the mounting bracket 24 is equivalent to being slidably installed on the first slide rail 11 as a whole.
[0036] Next, in this embodiment, the guide seat 9 is provided with a guide hole 91 for the plastic tube to pass through, the edge of the flying knife disk 4 is provided with a number of blades evenly spaced along its circumference, and the guide seat 9 is provided with a knife groove 92 for the blades to extend into.
[0037] Before cutting the plastic tube, the plastic tube needs to be clamped and placed between the upper roller 84 and the lower roller 73, and one end of the plastic tube needs to pass through the guide seat 9. At this time, the position of the guide seat 9 can be adjusted by sliding the mounting bracket 2, which can help the plastic tube to pass better into the guide hole 91 of the guide seat 9.
[0038] After the plastic tube passes through the guide hole 91 of the guide seat 95, the blade on the fly cutter disc 4 enters the cutter groove 92 and cuts the plastic tube. The design of the cutter groove 92 ensures that the blade cuts along the groove 92. Combined with the angular contact bearing described above, the blade will not shift its position due to vibration or shaking during the cutting process, thus ensuring that the accuracy error of each unit tube formed by the cut is within 3 microns.
[0039] For more details, please see Figure 9 As can be seen, in this embodiment, the feeding mechanism includes a first feeding component 7 and a second feeding component 8 arranged in a front-to-back alignment. The first feeding component 7 includes: The first motor base 71 is mounted on the frame 1 and is used to mount the first motor 72. The motor shaft of the first motor 72 is connected to the lower roller 73. The second feeding component 8 includes: The second motor base is mounted on the frame 1 and is used to mount the second motor 83. The motor shaft of the second motor 83 is connected to the upper roller 84. The upper roller 84 and the lower roller 73 are arranged vertically opposite each other. A plastic tube is inserted between the lower roller 73 and the upper roller 84.
[0040] In addition, to ensure that the conveying path of the plastic tube does not deviate, in this embodiment, a first groove 731 is provided around the surface of the lower roller 73, and a second groove 841 is provided around the surface of the upper roller 84, with the plastic tube sandwiched between the first groove 731 and the second groove 841.
[0041] Then, in this embodiment, the second motor 83 includes: The upright frame 81 is fixed on the frame 11, and at least one vertically arranged second slide rail 811 is provided on one side of the upright frame 81; The lifting plate 82 is slidably mounted on the second slide rail 811 via the third slider 821, and is used to mount the second motor 83.
[0042] Here, the lifting plate 82 is slidably mounted on the second slide rail 811. This ensures that the upper roller 84 can cooperate with the lower roller 73 to press the plastic tube, while also accommodating minor positional changes and errors. In this way, even if the diameter of the plastic tube changes, the normal high-speed transport of the plastic tube can be guaranteed.
[0043] In this embodiment, by setting at least two angular contact bearings on the mounting bracket 2 to provide rotational support for the main shaft 33, during the high-speed rotation of the main shaft 33 driven by the drive motor 32 through the coupling, since at least two angular contact bearings are installed in a face-to-face, back-to-back, or series-connected pairing manner, they can simultaneously bear radial and axial loads, suppressing the axial movement and runout of the main shaft 33, effectively ensuring the cutting accuracy of the bead, with all bead sizes being basically consistent, small cutting errors, and smooth cut edges without burrs, resulting in a low defect rate and excellent cutting stability. The flying cutter disc 4 is also not prone to wear, which can meet the production requirements of high precision and high efficiency.
[0044] The above description of the bean cutting mechanism using angular contact bearings of the present invention is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A bean-shaped cutting mechanism using angular contact bearings, mounted on the frame of a plastic tube cutting machine, the frame being provided with a feeding mechanism for continuously conveying plastic tubes, and a mounting frame for mounting the bean-shaped cutting mechanism, the mounting frame comprising at least a first bracket and a second bracket mounted on the frame, the second bracket being provided with a guide seat for one end of the plastic tube to pass through, characterized in that, The bean cutting mechanism includes: The drive device includes a drive motor mounted on the frame or the first bracket, and a main shaft linked to the drive motor. At least two angular contact bearings are mounted on the first bracket and the second bracket, and the main shaft passes through all of the angular contact bearings. The cutting disc, fixedly mounted on the main shaft, is used to cut the plastic tubes output from the guide seat at intervals and form beads.
2. The bean cutting mechanism using angular contact bearings according to claim 1, characterized in that, There are two angular contact bearings, which are respectively mounted on the first bracket and the second bracket, and the two angular contact bearings are mounted face to face.
3. A bean cutting mechanism using angular contact bearings according to claim 1, characterized in that, There are two angular contact bearings, which are respectively mounted on the first bracket and the second bracket, and the two angular contact bearings are mounted back to back.
4. A bean cutting mechanism using angular contact bearings according to claim 1, characterized in that, At least two of the angular contact bearings are mounted in series on the first bracket or the second bracket.
5. A bean cutting mechanism using angular contact bearings according to any one of claims 1-4, characterized in that, A coupling is mounted on the motor shaft of the drive motor, one end of the main shaft is fixed on the coupling, and a shrink sleeve is mounted on the main shaft. The shrink sleeve is arranged on one side of the fly cutter disc and is used to fix the fly cutter disc on the main shaft.
6. A bean cutting mechanism using angular contact bearings according to claim 5, characterized in that, The first bracket and / or the second bracket are provided with bearing seats for mounting the angular contact bearing.
7. A bean cutting mechanism using angular contact bearings according to claim 5, characterized in that, The first bracket and / or the second bracket are provided with end caps for covering the angular contact bearing, the end caps being arranged on one side of the angular contact bearing.
8. A bean cutting mechanism using angular contact bearings according to claim 1, characterized in that, The frame is provided with at least one first slide rail extending along its length. The lower end of the first bracket is provided with a first slider for slidingly connecting to the first slide rail. The lower end of the second bracket is provided with a second slider for slidingly connecting to the first slide rail. A connecting rod is provided between the first bracket and the second bracket.
9. A bean cutting mechanism using angular contact bearings according to claim 8, characterized in that, The feeding mechanism includes a first feeding component and a second feeding component arranged in a front-to-back alignment, wherein the first feeding component includes: A first motor base is mounted on the frame and is used to mount the first motor, with a lower roller connected to the motor shaft of the first motor; The second feeding assembly includes: The second motor base is mounted on the frame and is used to mount the second motor. An upper roller is connected to the motor shaft of the second motor. The upper roller and the lower roller are arranged vertically opposite each other. The plastic tube passes between the lower roller and the upper roller.
10. A bean cutting mechanism using angular contact bearings according to claim 9, characterized in that, The guide seat is provided with a guide hole for the plastic tube to pass through, and the edge of the flying knife disc is provided with several blades evenly spaced along its circumference. The guide seat is provided with a knife groove for the blades to extend into.