Lifting assembly in EVA board cutting machine
By adopting a beam design with linear bearings and guide rods sliding cooperation in the EVA sheet cutting machine, combined with buffer components and correction structures, the problem of insufficient linearity in the lifting of the cutting blade is solved, thereby improving cutting accuracy and the operational stability of the cutting machine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIZHOU SHANJIANG RUBBER & PLASTIC CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-24
AI Technical Summary
In existing EVA sheet cutting equipment, the linearity of the cutting blade's rise and fall is not good, which affects the cutting accuracy.
The beam design employs a sliding fit between linear bearings and guide rods, and uses buffer components and correction structures to ensure smooth beam movement and precise cutting.
It improves cutting accuracy, ensures precise blade movement, and adjusts the preset spring force to adapt to different plate thicknesses and cutting speeds, achieving optimal buffering and enhancing the stability and safety of the cutting machine operation.
Smart Images
Figure CN224544709U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical technology and relates to an EVA sheet cutting machine, particularly a lifting component in an EVA sheet cutting machine. Background Technology
[0002] EVA sheets are functional foam materials made primarily from ethylene-vinyl acetate copolymer. Their processing involves cutting equipment to cut the sheets into specific sizes.
[0003] Existing cutting equipment, such as the automatic EVA film sample cutting machine disclosed in the Chinese Patent Database (application number: 201810393400.1), includes a worktable with legs at the four corners of its lower end. The upper end of the worktable has two opposing pillars and springs. The pillars are connected to the front and rear ends of the lower end of a mounting plate. A hydraulic cylinder is located at the upper end of the mounting plate, with a hydraulic rod connected to its lower side. A cutting blade is located below the hydraulic rod. A cutting pad is located on the upper end of the worktable, directly below the cutting blade. An electric telescopic rod is located on the lower end of the worktable, with a counterweight at its lower end and a mounting groove on its bottom surface. A control switch is located on the upper end of the worktable. The input of the control switch is electrically connected to the output of an external power source, and the output of the control switch is electrically connected to the input of the hydraulic cylinder and the electric telescopic rod.
[0004] The aforementioned film cutting machine performs the cutting operation using a cutting blade, which is driven and raised entirely by a hydraulic cylinder. This can easily result in poor straightness of the blade's movement, affecting the cutting accuracy. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a lifting component in an EVA sheet cutting machine that can improve cutting accuracy.
[0006] The objective of this utility model can be achieved through the following technical solution: A lifting assembly in an EVA sheet cutting machine includes a frame, a buffer assembly, and a crossbeam for mounting blades. The frame includes a base plate and two guide rods vertically fixed to the base plate. Both ends of the crossbeam have vertically penetrating mounting holes, and the two guide rods are respectively inserted into the two mounting holes. The aforementioned buffer assembly is provided below both ends of the crossbeam. The characteristic feature is that a linear bearing matching the guide rod is fixed inside the mounting hole, and a sliding fit is formed between the linear bearing and the corresponding guide rod. The buffer assembly includes a... The screw is vertically positioned, and the base plate has two threaded holes for the lower ends of the two screws to be screwed into. The outer wall of the upper end of the screw has an annular retaining flange. A buffer ring and a spring are fitted on the screw. The two ends of the spring press against the buffer ring and the base plate respectively. Under the action of the spring, the buffer ring tends to press against the annular retaining flange. The outer diameter of the buffer ring is larger than the outer diameter of the annular retaining flange. The end of the crossbeam has a vertical through hole for the screw to pass through. The number of through holes and the screw are the same and their positions correspond one-to-one. The inner wall of the through hole has an annular pressing surface for pressing against the corresponding buffer ring.
[0007] In actual installation, the frame is also equipped with cylinders for driving the crossbeam to move up and down.
[0008] The crossbeam utilizes a sliding fit between the linear bearing and the guide rod to effectively improve the sliding accuracy of the crossbeam, thereby enabling the blade to move precisely downwards for cutting operations and significantly improving cutting precision.
[0009] At the same time, rotating the screw can move the buffer ring axially to adjust the preset spring, so that the preset elastic force can better meet the parameters such as the thickness of the plate and the cutting speed, so as to adjust to the optimal buffer state and further improve the cutting accuracy.
[0010] In the lifting assembly of the aforementioned EVA sheet cutting machine, buffer components are provided above both ends of the crossbeam, and the two buffer components at the same end of the crossbeam are symmetrically arranged. The frame also includes a horizontally positioned top plate with two threaded holes vertically penetrating it for the upper ends of two corresponding screws to screw into. The upper and lower ends of the two through holes are provided with the aforementioned pressure surfaces. Buffer components are provided on both the upper and lower sides of the crossbeam to make the cutting machine operate more smoothly and safely.
[0011] In the lifting assembly of the aforementioned EVA sheet cutting machine, a correction structure is provided between the buffer ring and the corresponding annular stop. The correction structure keeps the buffer ring in a horizontal state after it contacts and is limited by the corresponding annular stop, so as to prevent the buffer ring from tilting, ensure that the buffer ring smoothly enters the through hole and contacts the corresponding pressure surface, and make the cutting machine run smoothly.
[0012] In the lifting assembly of the aforementioned EVA sheet cutting machine, the straightening structure includes an annular guide groove formed on the bottom surface of the annular stop, with the annular guide groove and the annular stop being coaxially arranged. A guide ring, coaxial with the buffer ring, is formed on the top surface of the buffer ring. The upper end of the guide ring is inserted into the annular guide groove. The outer surface of the upper end of the guide ring is a conical surface (I) with a diameter that gradually increases from top to bottom. A conical surface (II) is formed on the inner wall of the annular guide groove, contacting and engaging with the conical surface (I). Under the action of the conical surfaces (I and II), the position of the buffer ring is forcibly straightened, keeping it horizontal. This design offers advantages such as simple structure and stable operation.
[0013] As another option, in the lifting assembly of the above-mentioned EVA sheet cutting machine, the correction structure includes two guide holes that are vertically inserted through the annular flange, and the two guide holes are symmetrically arranged along the center of the annular flange. Two guide posts that match the guide holes are vertically fixed on the buffer ring, and the two guide posts are respectively inserted into the corresponding two guide holes.
[0014] In the lifting assembly of the aforementioned EVA sheet cutting machine, notches are provided on both ends of the crossbeam. These notches divide the corresponding through holes into two vertically arranged straight holes, and each straight hole contains a pressure surface as described above. This design saves materials and facilitates processing.
[0015] Compared with existing technologies, the lifting assembly in this EVA sheet cutting machine has the following advantages: 1. The crossbeam utilizes a sliding fit between the linear bearing and the guide rod, which effectively improves the sliding accuracy of the crossbeam, prompting the blade to move down precisely for cutting operations, thus effectively improving cutting accuracy.
[0016] 2. Rotating the screw can move the buffer ring axially to adjust the preset spring force, so that the preset spring force can better meet the parameters such as the thickness of the plate and the cutting speed, so as to adjust to the optimal buffer state and further improve the cutting accuracy. Attached Figure Description
[0017] Figure 1 This is a 3D schematic diagram of the lifting assembly in an EVA sheet cutting machine.
[0018] Figure 2 This is a cross-sectional schematic diagram of the lifting assembly in an EVA sheet cutting machine.
[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.
[0020] Figure 4 yes Figure 3 Enlarged diagram of point B in the middle.
[0021] In the diagram, 1. Frame; 1a. Base plate; 1b. Top plate; 1c. Guide rod; 2. Crossbeam; 2a. Mounting hole; 2b. Through hole; 2c. Pressing surface; 2d. Notch; 3. Blade; 4. Linear bearing; 5. Screw; 5a. Annular flange; 5b. Annular guide groove; 5b1. Conical surface two; 6. Buffer ring; 6a. Guide ring; 6a1. Conical surface one; 7. Spring; 8. Cylinder. Detailed Implementation
[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0023] Example 1: The lifting assembly in this EVA sheet cutting machine includes a frame 1, a buffer assembly, and a crossbeam 2 for mounting the blade 3, and the crossbeam 2 is horizontally arranged.
[0024] in, The frame 1 includes a base plate 1a, a top plate 1b, and two vertically arranged guide rods 1c. Both the base plate 1a and the top plate 1b are horizontally positioned and directly opposite each other. The two guide rods 1c are arranged side-by-side between the base plate 1a and the top plate 1b, with both ends of each guide rod 1c fixed to the top plate 1b and the base plate 1a, respectively. In the actual product, the top and bottom surfaces of the guide rods 1c press against the top plate 1b and the base plate 1a, respectively, and preferably, each guide rod 1c is fixed to the top plate 1b and the base plate 1a by screws.
[0025] like Figure 2 As shown, both ends of the crossbeam 2 have vertically penetrating mounting holes 2a, and two guide rods 1c are respectively inserted into the two mounting holes 2a. A linear bearing 4 matching the guide rod 1c is fixed inside the mounting hole 2a, and a sliding fit is formed between the linear bearing 4 and the corresponding guide rod 1c. The linear bearing 4 is an existing product and can be purchased on the market; its fit with the guide rod 1c is existing technology and will not be described in detail here. The linear bearing 4 includes a cylindrical outer shell, which is fixedly connected to the crossbeam 2. Preferably, the outer shell and the inner hole of the mounting hole 2a form an interference fit, stably connecting the outer shell and the crossbeam 2. Further, each mounting hole 2a contains two linear bearings 4, and the two linear bearings 4 in the same mounting hole 2a are vertically distributed. Annular steps are formed on the inner walls of both ends of the mounting hole 2a, and in the same mounting hole 2a, the adjacent ends of the two outer shells respectively press against the bottom walls of the two annular steps.
[0026] A buffer assembly is provided below each end of the crossbeam 2. This buffer assembly includes a vertically arranged screw 5. The base plate 1a has two threaded holes for the lower ends of the two screws 5 to be screwed into, and rotating the screw 5 can drive it to move upwards or downwards. Figures 1 to 3As shown, the upper outer wall of the screw 5 has an annular retaining flange 5a, and the annular retaining flange 5a and the screw 5 are coaxially arranged. Preferably, the top surfaces of the annular retaining flange 5a and the screw 5 are flush. A buffer ring 6 and a spring 7 are fitted on the screw 5, with the buffer ring 6 positioned between the annular retaining flange 5a and the spring 7. The two ends of the spring 7 press against the buffer ring 6 and the base plate 1a respectively, and under the action of the spring 7, the buffer ring 6 tends to press against the annular retaining flange 5a. The outer diameter of the buffer ring 6 is larger than the outer diameter of the annular retaining flange 5a. A through hole 2b is vertically penetrating the end of the crossbeam 2 for the screw 5 to pass through; that is, the diameter of the through hole 2b is larger than the maximum outer diameter of the screw 5. The number of through holes 2b and screws 5 are the same and their positions correspond one-to-one. The inner wall of the through hole 2b has an annular pressing surface 2c for pressing against the corresponding buffer ring 6. The pressing surface 2c and the through hole 2b are coaxially arranged. The inner diameter of the pressing surface 2c is larger than the outer diameter of the screw 5, and the inner diameter of the pressing surface 2c is smaller than the annular flange 5a.
[0027] In actual installation, the frame 1 is also equipped with a cylinder 8 for driving the crossbeam 2 to move up and down. The cylinder 8 is an existing product and can be purchased on the market. In the actual product, the cylinder body of the cylinder 8 is mounted on the top plate 1b, and the piston rod of the cylinder 8 is connected to the middle of the crossbeam 2 through a connector.
[0028] The crossbeam 2 utilizes a sliding fit between the linear bearing 4 and the guide rod 1c, which effectively improves the sliding accuracy of the crossbeam 2, causing the blade 3 to move precisely downwards for cutting, thus improving cutting accuracy. Simultaneously, rotating the screw 5 allows the buffer ring 6 to move axially, adjusting the preset spring 7. This ensures the preset spring force better meets parameters such as plate thickness and cutting speed, achieving optimal buffering and further improving cutting accuracy.
[0029] To further explain, the aforementioned buffer components are also provided above both ends of the crossbeam 2, and the two buffer components at the same end of the crossbeam 2 are symmetrically arranged. At this time, two threaded holes are vertically penetrating the top plate 1b, respectively for the upper ends of the two corresponding screws 5 to be screwed into; the aforementioned pressure surfaces 2c are provided at both the upper and lower ends of the two through holes 2b, used to press against the four buffer rings 6 respectively. Buffer components are provided on both the upper and lower sides of the crossbeam 2 to make the cutting machine operate more smoothly and safely.
[0030] Furthermore, a correction structure is provided between the buffer ring 6 and the corresponding annular stop 5a. The correction structure keeps the buffer ring 6 in a horizontal state after it contacts and is limited by the corresponding annular stop 5a, so as to prevent the buffer ring 6 from tilting and ensure that the buffer ring 6 smoothly enters the through hole 2b and contacts the corresponding pressure surface 2c, so that the cutting machine can run smoothly.
[0031] In this embodiment, as Figures 2 to 4As shown, the correction structure includes an annular guide groove 5b formed on the bottom surface of the annular retaining edge 5a, and the annular guide groove 5b and the annular retaining edge 5a are coaxially arranged; a guide ring 6a coaxial with the buffer ring 6 is formed on the top surface of the buffer ring 6, and the guide ring 6a and the buffer ring 6 are an integral structure. The upper end of the guide ring 6a is inserted into the annular guide groove 5b, and the outer surface of the upper end of the guide ring 6a is a conical surface 6a1 whose diameter gradually increases from top to bottom. A second conical surface 5b1 is formed on the inner wall of the annular guide groove 5b, which contacts and fits with the first conical surface 6a1. Under the action of the first conical surface 6a1 and the second conical surface 5b1, the position of the buffer ring 6 is forcibly corrected to keep it in a horizontal state, which has the advantages of simple structure and stable operation.
[0032] In the actual product, notches 2d are provided on both ends of the crossbeam 2. The notches 2d divide the corresponding through holes 2b into two straight holes arranged vertically, and each straight hole has a pressure surface 2c as described above. The above design can save materials and facilitate processing.
[0033] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the correction structure includes two guide holes that are vertically inserted through the annular flange 5a. The two guide holes are symmetrically arranged along the center of the annular flange 5a. Two guide posts that match the guide holes are vertically fixed on the buffer ring 6. The two guide posts are respectively inserted into the corresponding two guide holes.
[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A lifting assembly in an EVA sheet cutting machine, comprising a frame (1), a buffer assembly, and a crossbeam (2) for mounting blades (3), wherein the frame (1) comprises a base plate (1a) and two guide rods (1c) vertically fixed on the base plate (1a), both ends of the crossbeam (2) have vertically penetrating mounting holes (2a), the two guide rods (1c) are respectively inserted into the two mounting holes (2a), and the aforementioned buffer assembly is provided below both ends of the crossbeam (2), characterized in that, A linear bearing (4) matching the guide rod (1c) is fixed in the mounting hole (2a), and a sliding fit is formed between the linear bearing (4) and the corresponding guide rod (1c); the buffer assembly includes a vertically arranged screw (5), and the base plate (1a) is provided with two threaded holes for the lower ends of the two screws (5) to be screwed in respectively; the upper end of the screw (5) has an annular flange (5a), and a buffer ring (6) and a spring (7) are sleeved on the screw (5), with the two ends of the spring (7) pressing against the buffer ring. On the punch ring (6) and the base plate (1a), and under the action of the spring (7), the buffer ring (6) tends to press against the annular retaining edge (5a); the outer diameter of the buffer ring (6) is larger than the outer diameter of the annular retaining edge (5a); the end of the crossbeam (2) has a through hole (2b) through which the screw (5) passes, and the number of through holes (2b) and the screw (5) are the same and their positions correspond one to one; the inner wall of the through hole (2b) has a ring-shaped pressing surface (2c) for pressing against the corresponding buffer ring (6).
2. The lifting assembly in the EVA sheet cutting machine according to claim 1, characterized in that, The above-mentioned buffer components are provided above both ends of the crossbeam (2), and the two buffer components at the same end of the crossbeam (2) are symmetrically arranged; the frame (1) also includes a horizontally arranged top plate (1b), and two threaded holes are vertically inserted on the top plate (1b) for the upper ends of the corresponding two screws (5) to be screwed in respectively. The above-mentioned pressure surface (2c) is provided at both the upper and lower ends of the two through holes (2b).
3. The lifting assembly in the EVA sheet cutting machine according to claim 1 or 2, characterized in that, A correction structure is provided between the buffer ring (6) and the corresponding annular stop (5a), which makes the buffer ring (6) remain horizontal after it contacts and is limited by the corresponding annular stop (5a).
4. The lifting assembly in the EVA sheet cutting machine according to claim 3, characterized in that, The corrective structure includes an annular guide groove (5b) formed on the bottom surface of the annular retaining edge (5a), and the annular guide groove (5b) and the annular retaining edge (5a) are coaxially arranged; a guide ring (6a) coaxial with the buffer ring (6) is formed on the top surface of the buffer ring (6), the upper end of the guide ring (6a) is inserted into the annular guide groove (5b), the upper outer side of the guide ring (6a) is a cone surface one (6a1) whose diameter gradually increases from top to bottom, and a cone surface two (5b1) that contacts and cooperates with the cone surface one (6a1) is formed on the inner wall of the annular guide groove (5b).
5. The lifting assembly in the EVA sheet cutting machine according to claim 3, characterized in that, The correction structure includes two guide holes that are vertically inserted through the annular retaining edge (5a), and the two guide holes are symmetrically arranged along the center of the annular retaining edge (5a). Two guide posts that match the guide holes are vertically fixed on the buffer ring (6), and the two guide posts are respectively inserted into the corresponding two guide holes.
6. The lifting assembly in the EVA sheet cutting machine according to claim 2, characterized in that, The crossbeam (2) has notches (2d) on both ends. The notches (2d) divide the corresponding through hole (2b) into two straight holes arranged vertically, and each straight hole has a pressure surface (2c) as described above.