Follow-up high-frequency eccentric shearing device

Abstract

The utility model relates to a kind of servo high frequency eccentric shearing device, including the cutter being longitudinally arranged on the rack, the eccentric drive mechanism for converting rotary motion into cutter reciprocating cutting action is provided on the rack, the rubber roller shaft being longitudinally arranged is rotatably connected on the lower side of cutter in the rack, the one end of rubber roller shaft is transmissionally connected with power input mechanism through one-way overrunning clutch mechanism;When the cutting speed of cutter is greater than the rotating speed of rubber roller shaft, cutter rotates forward while cutting, pushing rubber roller shaft.The device not only can ensure cutting efficiency, but also helps to slow down the rubber layer of rubber roller shaft being cut.

Description

Technical Field

[0001] This utility model relates to a follow-up high-frequency eccentric shear device. Background Technology

[0002] When cutting sheet materials from a veneer lathe, the top section of the sheet is usually cut more frequently (to cut shorter boards), while the middle section is of better quality and requires fewer cuts (to cut whole boards / long boards). Currently, there are two methods for cutting sheet materials: rotary shearing and stop-cutting. Rotary shearing has limitations when cutting sheet materials; it cannot cut short pieces of wood or may result in inaccurate cuts, making it difficult to meet user needs.

[0003] The stop-shear method usually requires the sheet material to be rolled into a roll before shearing. During the shearing process, the sheet material needs to be temporarily stopped from being conveyed to cooperate with the shearing action. This not only results in low work efficiency, but also fails to meet the requirement that the sheet material being cut by the veneer machine be completed during the conveying process.

[0004] Furthermore, in the shearing equipment, the rubber roller shaft used to cooperate with the cutter (the rubber layer on the rubber roller is usually only 10mm) has a speed difference between the rubber roller and the cutter when the cutter is cutting quickly during the rotary shearing process. Since the speed difference cannot be canceled in the existing shearing equipment, the cutter cuts directly on the PU roller, which easily causes the rubber layer on the rubber roller shaft to be cut into grooves. As a result, the rubber layer on the rubber roller shaft will be cut off quickly, requiring the replacement of the rubber roller or re-coating, resulting in high maintenance costs. Utility Model Content

[0005] The purpose of this invention is to provide a follow-up high-frequency eccentric shearing device, which not only ensures cutting efficiency but also helps to slow down the damage of the rubber layer on the rubber roller shaft.

[0006] The technical solution of this utility model is as follows: a follow-up high-frequency eccentric shearing device, including a cutter arranged longitudinally on a frame, an eccentric drive mechanism for converting rotational motion into reciprocating downward cutting motion of the cutter on the frame, a rubber roller shaft arranged longitudinally rotatably connected to the lower side of the cutter on the frame, one end of the rubber roller shaft being connected to a power input mechanism via a one-way overrunning clutch mechanism; when the cutting speed of the cutter is greater than the rotational speed of the rubber roller shaft, the cutter pushes the rubber roller shaft to rotate forward while cutting.

[0007] Furthermore, the eccentric drive mechanism includes multiple swing arms spaced longitudinally, the cutter is vertically fixed to the front end of the multiple swing arms, a rotating shaft assembly is rotatably connected to the front of the multiple swing arms and eccentrically arranged, a servo motor is installed at one or both ends of the rotating shaft assembly, a connecting rod is hinged to the rear end of the swing arm, and the upper end of the connecting rod is hinged to the frame.

[0008] Furthermore, the rotating shaft assembly includes an eccentric shaft, and the front part of each swing arm is rotatably connected to an eccentrically arranged eccentric shaft. Both sides of the eccentric shaft are rotatably connected to the frame via bearing seats, and the ends of two adjacent eccentric shafts are connected by a coupling.

[0009] Furthermore, each of the upper front ends of the swing arms is connected to a spring, the upper end of which is used to abut against the frame.

[0010] Furthermore, the power input mechanism includes a geared motor, and one end of the rubber roller shaft is connected to the output end of the geared motor via a one-way overrunning clutch mechanism and a chain transmission mechanism.

[0011] Furthermore, the one-way overrunning clutch mechanism is a one-way bearing.

[0012] Furthermore, a clamping mechanism driven to rotate by a power input mechanism is provided on the rear side of the frame, and an output mechanism is provided on the rear side of the frame.

[0013] Furthermore, the clamping mechanism includes a driving shaft and a driven shaft arranged vertically and mounted longitudinally. The driving shaft and the driven shaft are connected by a gear pair to achieve opposite rotation. A first driving sprocket is fixedly fixed at an axial distance on the driving shaft. A first driven sprocket is rotatably connected to the front side of the first driving sprocket on the frame via a first connecting frame. A first chain is wound between the first driven sprocket and the first driving sprocket. A second driving sprocket is fixedly fixed at an axial distance on the driven shaft above the first driving sprocket. A second driven sprocket is rotatably connected to the front side of the second driving sprocket via a second connecting frame. A second chain is wound between the second driven sprocket and the second driving sprocket. A third driven sprocket is mounted on the frame so that the lower side of the second chain fits against the upper side of the first chain.

[0014] Furthermore, a plurality of first driving pulleys are fixed at intervals on the driving shaft, and a first driven pulley corresponding to the first driving pulley is rotatably connected to the rear side of the frame via an extension frame, and a first conveyor belt is wound between the first driving pulley and the first driven pulley.

[0015] Furthermore, the output mechanism includes a longitudinal rotating shaft mounted longitudinally on the front side of the rubber roller shaft, a plurality of second driving pulleys are fixed at intervals on the longitudinal rotating shaft, and a second driven pulley corresponding to the second driving pulley is rotatably connected to the front side of the frame via an extension plate, and a second conveyor belt is wound between the second driving pulley and the second driven pulley.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This device features a compact structure. By incorporating a cutter driven by an eccentric mechanism, it combines the advantages of rotary shearing and flat shearing, meeting both fast and slow cutting requirements and ensuring cutting efficiency. The end of the rubber roller shaft is connected to the power input mechanism in a one-way axial direction. When the cutting speed or rotational speed of the cutter exceeds the rotational speed of the rubber roller shaft, the inertial force of the cutter's upward movement after cutting can drive the rubber roller shaft to rotate. This helps to avoid or reduce the indentation on the rubber surface of the rubber roller shaft caused by the cutter, slowing down the rate of rubber damage and reducing maintenance costs.

[0017] 2. This device uses a spring to counteract the weight of the cutter, which helps the cutter rise quickly and ensures stable cutting of sheet wood.

[0018] 3. The clamping mechanism facilitates the feeding of sheet materials or objects to be cut between the cutter and the rubber roller shaft, preventing the sheet materials or objects to be cut from shifting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the hidden clamping and output mechanism of this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of area A; Figure 5 For the present utility model Figure 3 A cross-sectional view of the chain drive mechanism; Figure 6 For the present utility model Figure 3 A cross-sectional view at the clamping mechanism; Figure 7 This is a structural diagram of the rocker arm, connecting rod, and cutter assembly of this utility model; Figure 8 This is a schematic diagram of the first conveyor belt structure of this utility model; Figure 9 This is a schematic diagram of the output mechanism structure of this utility model; In the diagram: 1-Frame; 2-Cutter; 3-Roller shaft; 41-Swing arm; 42-Connecting rod; 43-Servo motor; 44-Rotating shaft assembly; 441-Eccentric shaft; 442-Bearing seat; 443-Coupling; 45-Spring; 51-Gear motor; 52-One-way overrunning clutch mechanism; 53-Drive sprocket; 54-Driven sprocket; 55-Drive chain; 56-Tension sprocket; 61-Driven rotating shaft; 62-Driven rotating shaft; 63-Gear pair; 64-First drive sprocket; 65-First connecting frame; 66-First driven sprocket; 67-First chain; 68-Second drive sprocket; 69-Second connecting frame; 70-Second driven sprocket; 71-Second chain; 72-Third driven sprocket; 73-First drive pulley; 74-Extension frame; 75-First driven pulley; 76-First conveyor belt; 81-Longitudinal rotating shaft; 82-Second drive pulley; 83-Extension plate; 84-Second driven pulley; 85-Second conveyor belt; 9-Idler roller assembly. Detailed Implementation

[0020] To make the above-mentioned features and advantages of this utility model more easily understood, specific embodiments are described below in conjunction with the accompanying drawings, but this utility model is not limited thereto.

[0021] refer to Figures 1 to 9 A follow-up high-frequency eccentric shearing device includes a cutter 2 longitudinally mounted on a frame 1. The frame is equipped with an eccentric drive mechanism for converting rotational motion into reciprocating downward cutting motion of the cutter. The eccentric drive mechanism drives the cutter, controlling its cutting speed to meet different cutting speed requirements. A longitudinally mounted rubber roller shaft 3 is rotatably connected to the frame below the cutter. One end of the rubber roller shaft is connected to a power input mechanism via a one-way overrunning clutch, driving the rubber roller shaft to rotate. When the cutter's cutting speed or oscillation speed exceeds the rubber roller shaft's rotational speed, the cutter pushes the rubber roller shaft forward while cutting, preventing or reducing the formation of indentations on the rubber roller surface, slowing down the rate of rubber layer damage, and reducing maintenance costs.

[0022] In this embodiment, to better drive the cutter to reciprocate downwards, the eccentric drive mechanism includes multiple swing arms 41 spaced longitudinally. The cutter is vertically fixed to the front end of the multiple swing arms. Each swing arm has a connecting rod 42 hinged to its rear end, the upper end of which is hinged to the frame. A rotating shaft assembly is rotatably connected to the front of the multiple swing arms and eccentrically positioned. A servo motor 43 is installed at one or both ends of the rotating shaft assembly. The servo motor drives the rotating shaft assembly to rotate clockwise, allowing the front end of the swing arms to eccentrically swing and reciprocate, thereby driving the cutter to reciprocate in cutting the sheet material. Simultaneously, the servo motor also controls the rotational speed of the rotating shaft assembly, thus controlling the cutting speed of the cutter. Using two servo motors rotating synchronously and at the same speed also helps to ensure the rotational torque of the rotating shaft assembly.

[0023] In this embodiment, in order to better drive the swing arm eccentrically, the rotating shaft assembly 44 includes an eccentric shaft 441. The front part of the swing arm is rotatably connected to the eccentrically set eccentric shaft. Both sides of the eccentric shaft are rotatably connected to the frame via bearing seats 442. The ends of two adjacent eccentric shafts are connected to each other via a coupling 443.

[0024] In this embodiment, a spring 45 is connected to the upper front end of each swing arm. The upper end of the spring is used to abut against the frame, thereby counteracting the weight of the cutter and making the cutting action of the cutter smoother.

[0025] In this embodiment, the adhesive layer provided on the surface of the rubber roller shaft also helps to avoid rigid contact between the cutter and the rubber roller shaft.

[0026] In this embodiment, to drive the rubber roller shaft to rotate, the power input mechanism includes a geared motor 51. One end of the rubber roller shaft is connected to the output end of the geared motor via a one-way overrunning clutch mechanism 52 and a chain drive mechanism. Specifically, the chain drive mechanism includes a drive sprocket 53 mounted on the output end of the geared motor, a driven sprocket 54 mounted on one end of the rubber roller shaft via the one-way overrunning clutch mechanism, and a drive chain 55 mounted between the drive sprocket and the driven sprocket. Thus, the geared motor drives the rubber roller shaft to rotate counterclockwise via the chain drive mechanism. A tensioning sprocket 56 is also provided on the frame to tension the drive chain.

[0027] In this embodiment, the one-way overrunning clutch mechanism is a one-way bearing, which makes the rubber roller shaft rotate only counterclockwise. When the cutting speed of the cutter or the swing speed of the cutter is greater than the rotation speed of the rubber roller shaft, the cutter can push the rubber roller shaft forward (counterclockwise) while cutting by using the inertial force of the forward swing.

[0028] In this embodiment, a clamping mechanism driven by a power input mechanism is provided on the rear side of the frame to convey sheet material between the rubber roller and the cutter. The clamping mechanism includes a driving shaft 61 and a driven shaft 62, which are arranged vertically and installed longitudinally. One end of the driving shaft is connected to the output end of the reduction motor of the power input mechanism. The driven shaft is arranged longitudinally above the driving shaft. One end of the driving shaft and the driven shaft are connected by a gear pair 63 to achieve opposite rotation (the driving shaft rotates counterclockwise and the driven shaft rotates clockwise).

[0029] The aforementioned active rotating shaft is fixed with a first active sprocket 64 at axial intervals. The frame is rotatably connected to a first driven sprocket 66 on the front side of the first active sprocket via a first connecting frame 65. A first chain 67 is wound between the first driven sprocket and the first active sprocket. The front end of the first connecting frame has an extension that extends toward the upper surface of the rubber roller shaft so that the sheet material can be better guided onto the upper end surface of the rubber roller shaft.

[0030] A second drive sprocket 68, located above the first drive sprocket, is fixed axially at a distance from the aforementioned driven shaft. A second driven sprocket 70 is rotatably connected to the front of the second drive sprocket via a second connecting frame 69. A second chain 71 is wound between the second driven sprocket and the second drive sprocket. A third driven sprocket 72, a tension sprocket, is mounted on the frame to ensure that the lower side of the second chain is in contact with the upper side of the first chain. Thus, the sheet material is clamped forward and fed between the cutter and the rubber roller shaft through the cooperation of the first and second chains.

[0031] In this embodiment, to better feed the sheet material into the clamping mechanism, a plurality of first drive pulleys 73 are fixedly fixed at intervals on the drive shaft. An extension frame 74 is fixed to the rear side of the frame, and a first driven pulley 75 corresponding to the first drive pulley is rotatably connected to the rear end of the extension frame. A first conveyor belt 76 is wound between the first drive pulley and the first driven pulley. Thus, the first conveyor belt is synchronously driven to rotate by the reduction motor, allowing the sheet material to enter between the first chain and the second chain.

[0032] In this embodiment, to facilitate the output of the cut sheet material, an output mechanism is provided on the rear side of the frame. The output mechanism includes a longitudinal rotating shaft 81 mounted longitudinally on the front side of the rubber roller shaft. The longitudinal rotating shaft is driven to rotate by a motor or is connected to the end of the rubber roller shaft via a transmission structure. A plurality of second driving pulleys 82 are fixedly fixed at intervals on the longitudinal rotating shaft. An extension plate 83 is fixedly fixed at intervals on the front side of the frame. The front end of the extension plate is rotatably connected to a second driven pulley 84. A second conveyor belt 85 is wound between the corresponding second driving pulleys and the second driven pulleys, thereby outputting the cut sheet material.

[0033] In this embodiment, a roller assembly 9 is also provided on the lower side of the middle of the rubber roller shaft on the frame, which cooperates with the bottom surface of the rubber roller shaft, thereby reducing the possibility of the rubber roller shaft bending downwards due to its large span. A limiting baffle is also provided on the front side of the cutter to prevent the cutter from cutting too deeply.

[0034] If the terms "first" and "second" are used in the above description to define the components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of distinguishing the components in the description. Unless otherwise stated, the above terms have no special meaning.

[0035] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting or welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0036] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0037] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0038] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A servo high frequency eccentric shearing device comprising a cutting knife longitudinally arranged on a frame, characterized in that, The frame is equipped with an eccentric drive mechanism for converting rotary motion into reciprocating downward cutting motion of the cutter. A longitudinally arranged rubber roller shaft is rotatably connected to the lower side of the cutter on the frame. One end of the rubber roller shaft is connected to the power input mechanism via a one-way overrunning clutch mechanism. When the cutting speed of the cutter is greater than the rotational speed of the rubber roller shaft, the cutter pushes the rubber roller shaft forward to rotate while cutting.

2. The servo high frequency eccentric shearing device according to claim 1, characterized in that, The eccentric drive mechanism includes multiple swing arms spaced longitudinally. The cutter is vertically fixed to the front end of the multiple swing arms. A rotating shaft assembly is rotatably connected to the front of the multiple swing arms and is eccentrically arranged. A servo motor is installed at one or both ends of the rotating shaft assembly. A connecting rod is hinged to the rear end of the swing arm. The upper end of the connecting rod is hinged to the frame.

3. The servo high frequency eccentric shearing device according to claim 2, characterized in that, The rotating shaft assembly includes an eccentric shaft. The front part of each swing arm is rotatably connected to an eccentrically set eccentric shaft. Both sides of the eccentric shaft are rotatably connected to the frame via bearing seats. The ends of two adjacent eccentric shafts are connected by a coupling.

4. The servo high frequency eccentric shearing device according to claim 2 or 3, characterized in that, Each of the swing arms has a spring connected to its upper front end, and the upper end of the spring is used to abut against the frame.

5. The servo high frequency eccentric shearing device according to claim 1, wherein, The power input mechanism includes a geared motor, and one end of the rubber roller shaft is connected to the output end of the geared motor via a one-way overrunning clutch mechanism and a chain transmission mechanism.

6. The servo high frequency eccentric shearing device according to claim 1 or 5, characterized in that, The one-way overrunning clutch mechanism is a one-way bearing.

7. The servo high frequency eccentric shearing device according to claim 1, wherein, The rear side of the frame is provided with a clamping mechanism that is driven to rotate by a power input mechanism, and the rear side of the frame is provided with an output mechanism.

8. The follow-up high-frequency eccentric shear device according to claim 7, characterized in that, The clamping mechanism includes a driving shaft and a driven shaft arranged vertically and mounted longitudinally. The driving shaft and the driven shaft are connected by a gear pair to achieve opposite rotation. A first driving sprocket is fixedly fixed along the axial direction on the driving shaft. A first driven sprocket is rotatably connected to the front side of the first driving sprocket on the frame via a first connecting frame. A first chain is wound between the first driven sprocket and the first driving sprocket. A second driving sprocket is fixed along the axial direction on the driven shaft at a distance above the first driving sprocket. A second driven sprocket is rotatably connected to the front side of the second driving sprocket via a second connecting frame. A second chain is wound between the second driven sprocket and the second driving sprocket. A third driven sprocket is mounted on the frame so that the lower side of the second chain is in contact with the upper side of the first chain.

9. The servo high frequency eccentric shearing device according to claim 8, wherein, A plurality of first driving pulleys are fixed at intervals on the driving shaft, and a first driven pulley corresponding to the first driving pulley is rotatably connected to the rear side of the frame via an extension frame. A first conveyor belt is wound between the first driving pulley and the first driven pulley.

10. The servo high frequency eccentric shearing device according to claim 7, 8 or 9, characterized in that, The output mechanism includes a longitudinal rotating shaft mounted longitudinally on the front side of the rubber roller shaft. Several second driving pulleys are fixed at intervals on the longitudinal rotating shaft. The front side of the frame is rotatably connected to a second driven pulley corresponding to the second driving pulley via an extension plate. A second conveyor belt is wound between the second driving pulley and the second driven pulley.

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