Vibrating cutting knife and cutting equipment

Abstract

The present invention provides a vibration cutting knife and cutting equipment, belonging to the field of cutting technology, including: a first crankshaft, including a first rotating shaft, a first eccentric block and a first crank, and an eccentric hole is arranged on the first crank; a second crankshaft, including a second rotating shaft, a second eccentric block, a second crank and an eccentric shaft, and the eccentric shaft is plugged and matched with the eccentric hole; a connecting rod, one end of which is nested on the eccentric shaft, and the other end is connected with a knife mounting assembly; a first counterweight plate and a second counterweight plate, one end of which is respectively nested and connected with the first eccentric block and the second eccentric block, and the other ends of the two are connected through an axial hole; a counterweight slider, which is nested at the connection between the first counterweight plate and the second counterweight plate. The first counterweight plate, the second counterweight plate and the connecting rod in the present invention can swing and rotate in the corresponding vertical plane, realizing dynamic balance, thereby eliminating the noise generated by the vibration cutting knife during high-frequency vibration and improving the cutting environment.

Description

Technical Field

[0001] The invention belongs to the field of cutting technology and relates to a vibrating cutting knife, in particular to a vibrating cutting knife and cutting equipment. Background Art

[0002] The cutting tool is used to cut flexible materials such as cardboard or cloth, while the high-frequency vibration cutting tool is based on the cutting tool and gives it high-frequency vibration, and the high-frequency vibration comes from the output of the motor. That is, the cutting tool is vibrated up and down by the rotation of the motor output end, so as to achieve the purpose of cutting. As the speed increases, the vibration frequency of the cutting tool increases accordingly, and the speed and vibration frequency are in direct proportion.

[0003] However, according to the prior art, the maximum speed of the motor is constant. When the motor reaches the maximum speed, the cutting tool reaches the maximum vibration frequency. If you want to further increase the vibration frequency of the cutting tool, you need to replace the motor, which will increase the cutting cost. Moreover, if the motor is always running at the maximum speed, it is easy to cause damage to the motor and affect the service life of the motor.

[0004] Patent application CN202310459482.6 discloses a high-frequency electric vibration tool and cutting equipment, which can increase the vibration frequency of the cutting tool and improve the cutting quality without replacing the motor. However, the motion trajectory of the counterweight structure used for noise reduction in this patent is a rotational motion and cannot achieve swinging. Therefore, the setting of the counterweight structure can only achieve limited noise reduction effect. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to provide a vibration cutting knife capable of improving the noise reduction effect.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A vibrating cutting knife, comprising:

[0007] A first crankshaft, wherein a first rotating shaft, a first eccentric block and a first crank are sequentially arranged along the axis direction of the first crankshaft, and an eccentric hole is arranged on the first crank, wherein the axis of the first rotating shaft is coaxially arranged with the axis of the first crank, and when the first eccentric block is projected onto the first crank, the center of the first eccentric block, the center of the first crank and the center of the eccentric hole are on the same straight line, and the center of the first crank is located between the center of the first eccentric block and the center of the eccentric hole;

[0008] A second crankshaft, a second rotating shaft, a second eccentric block, a second crank and an eccentric shaft are sequentially arranged along the axial direction of the second crankshaft, and the eccentric shaft is plugged and matched with the eccentric hole, wherein the axis of the second rotating shaft is coaxially arranged with the axis of the second crank, and when the second eccentric block and the eccentric shaft are projected onto the second crank, the center of the second eccentric block, the center of the second crank and the center of the eccentric shaft are on the same straight line, and the center of the second crank is located between the center of the second eccentric block and the center of the eccentric shaft;

[0009] A connecting rod is located between the first crank and the second crank, and one end of the connecting rod is embedded in the eccentric shaft, the two are rotatably connected, and the other end of the connecting rod is connected to the knife mounting assembly;

[0010] The first counterweight plate and the second counterweight plate, one end of each of which is respectively nested and connected with the first eccentric block and the second eccentric block, and the other ends of each of which is connected through an axis hole;

[0011] The counterweight slider is vertically arranged between the first counterweight plate and the second counterweight plate, and one end of the counterweight slider is nested in the connection between the first counterweight plate and the second counterweight plate;

[0012] Among them, one of the first rotating shaft and the second rotating shaft serves as the input shaft of the vibration cutting knife. When the first crankshaft rotates synchronously with the second crankshaft, the connecting rod, the first counterweight plate and the second counterweight plate can swing and rotate in corresponding vertical planes respectively.

[0013] In the above-mentioned vibration cutting knife, the first eccentric block is superimposed on the first crank, and the second eccentric block is superimposed on the second crank. When the first counterweight plate is nested on the first eccentric block, the first counterweight plate and the first crank are isolated by a gasket; when the second counterweight plate is nested on the second eccentric block, the second counterweight plate and the second crank are isolated by a gasket.

[0014] In the above-mentioned vibrating cutter, the first crank and one end of the connecting rod nested with the eccentric shaft are matched through a concave-convex fit; the second crank and one end of the connecting rod nested with the eccentric shaft are matched through a concave-convex nesting fit, wherein a convex portion is provided on the connecting rod, and a concave portion is provided on the first crank and the second crank, and the convex portion and the concave portion are arranged in a stepped shape.

[0015] In the above-mentioned vibrating cutting knife, the axis of the first rotating shaft is coaxially arranged with the axis of the second rotating shaft, and the first eccentric block, the first counterweight plate, the first crank, the second eccentric block, the second counterweight plate and the second crank are symmetrically distributed with the connecting rod as the center, wherein the center of gravity of the structure composed of the first eccentric block, the first counterweight plate, the first crank, the second eccentric block, the second counterweight plate, the second crank and the eccentric shaft is located on the axis where the first rotating shaft or the second rotating shaft is located, and the connecting rod is nested on the eccentric shaft through a bearing.

[0016] In the above-mentioned vibration cutting knife, a first oil passage is provided on the surface of the first crank facing away from the first eccentric block, and a second oil passage is provided on the side of the first crank, wherein the first oil passage is connected with the second oil passage, and the first oil passage on the first crank includes the eccentric hole, and the first oil passage on the second crank includes the eccentric shaft.

[0017] In the above-mentioned vibrating cutting knife, the first mounting hole and the second mounting hole are respectively provided at both ends of the first counterweight plate and the second counterweight plate, and a sleeve is inserted into the first mounting hole on the first counterweight plate, and the second mounting hole on the first counterweight plate is nested with the first eccentric block, and the first mounting hole on the second counterweight plate is inserted with a pin shaft, and the second mounting hole on the second counterweight plate is nested with the second eccentric block, wherein the sleeve and the pin shaft form a plug-in fit and are locked by fasteners.

[0018] In the above-mentioned vibration cutting knife, a first plane is arranged on the outer circumferential surface of the sleeve, and a first fixing hole is arranged on the first plane, a second plane is arranged on the outer circumferential surface of the pin shaft, and a second fixing hole is arranged on the second plane, when the pin shaft is inserted into the sleeve, the position of the first fixing hole corresponds to the position of the second fixing hole, and the connection between the sleeve and the pin shaft is completed by a fastener.

[0019] In the above-mentioned vibrating cutting knife, the first counterweight plate and the second counterweight plate have the same structure, and the first counterweight plate includes a counterweight block connected to the sleeve, and a shaft ring nested with the first eccentric block, wherein the first mounting hole is arranged on the counterweight block, the second mounting hole is arranged on the shaft ring, and the counterweight block is arranged in a convex shape, and the two sides of the counterweight block are respectively transitioned to the outer wall of the shaft ring through circular arcs.

[0020] In the above-mentioned vibrating cutter, the first counterweight plate and the second counterweight plate are respectively nested in the first eccentric block and the second eccentric block through bearings; the connecting rod is nested in the eccentric shaft through bearings; and the counterweight slider is nested in the shaft hole connection of the first counterweight plate and the second counterweight plate through bearings.

[0021] In the above-mentioned vibration cutting knife, the first crankshaft and the second crankshaft are arranged in one piece to form an axisymmetric structure, wherein the connecting rod is nested in the center position of the axisymmetric structure.

[0022] The invention also provides a cutting device, comprising the vibration cutting knife.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) In the vibrating cutting knife provided by the present invention, the first counterweight plate, the second counterweight plate and the connecting rod can swing and rotate in the corresponding vertical plane, thereby achieving dynamic balance, thereby eliminating the noise generated by the vibrating cutting knife during high-frequency vibration and improving the cutting environment;

[0025] (2) The first crank and the connecting rod, and the second crank and the connecting rod are all concave-convex nested, so that when the first crankshaft and the second crankshaft rotate synchronously, the connecting rod and the first crank and the second crank are prevented from relative movement, thereby ensuring the synchronous rotation of the connecting rod and the first crank and the second crank. In addition, the convex part and the concave part are arranged in a stepped shape, which can further ensure the synchronous rotation of the connecting rod and the first crank and the second crank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a vibrating cutting knife of the present invention.

[0027] Figure 2 It is a structural schematic diagram of a vibrating cutting knife of the present invention from another perspective.

[0028] Figure 3 yes Figure 2 Section view along the cutting line AA.

[0029] Figure 4 It is a partial structural schematic diagram of a vibrating cutting knife of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the first crankshaft in a preferred embodiment of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the second crankshaft in a preferred embodiment of the present invention.

[0032] Figure 7 It is a structural schematic diagram of the first counterweight plate in a preferred embodiment of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the second counterweight plate in a preferred embodiment of the present invention.

[0034] In the figure,

[0035] 100, first crankshaft; 110, first rotating shaft; 120, first eccentric block; 130, first crank; 131, eccentric hole; 132, recess; 133, first circular arc; 134, second circular arc; 135, first oil passage; 136, second oil passage;

[0036] 200, second crankshaft; 210, second rotating shaft; 220, second eccentric block; 230, second crank; 240, eccentric shaft;

[0037] 300, connecting rod; 310, convex part;

[0038] 400, knife mounting assembly;

[0039] 500, first counterweight plate; 510, sleeve; 511, first plane; 512, first fixing hole; 520, counterweight block; 521, first mounting hole; 530, collar; 531, second mounting hole;

[0040] 600, second counterweight plate; 610, pin shaft; 611, second plane; 612, second fixing hole;

[0041] 700, counterweight slider;

[0042] 800, counterweight sleeve;

[0043] 900. Gasket. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0045] 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 position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] like Figures 1 to 8 As shown, the present invention provides a vibrating cutting knife, comprising:

[0047] A first crankshaft 100, wherein a first rotating shaft 110, a first eccentric mass 120 and a first crank 130 are sequentially arranged along the axial direction of the first crankshaft 100, and an eccentric hole 131 is arranged on the first crank 130, wherein the axis of the first rotating shaft 110 is coaxially arranged with the axis of the first crank 130, and the projection of the first rotating shaft 110 on the first eccentric mass 120 is tangent to the edge of the first eccentric mass 120, and when the first eccentric mass 120 is projected onto the first crank 130, the center of the first eccentric mass 120, the center of the first crank 130 and the center of the eccentric hole 131 are on the same straight line, and the center of the first crank 130 is located between the center of the first eccentric mass 120 and the center of the eccentric hole 131;

[0048] The second crankshaft 200, along the axial direction of the second crankshaft 200, is sequentially provided with a second rotating shaft 210, a second eccentric mass 220, a second crank 230 and an eccentric shaft 240, and the eccentric shaft 240 is plugged into and matched with the eccentric hole 131, wherein the axis of the second rotating shaft 210 is coaxially arranged with the axis of the second crank 230, and the projection of the second rotating shaft 210 on the second eccentric mass 220 is tangent to the edge of the second eccentric mass 220, and when the second eccentric mass 220 and the eccentric shaft 240 are projected onto the second crank 230, the center of the second eccentric mass 220, the center of the second crank 230 and the center of the eccentric shaft 240 are on the same straight line, and the center of the second crank 230 is located between the center of the second eccentric mass 220 and the center of the eccentric shaft 240;

[0049] The connecting rod 300 is located between the first crank 130 and the second crank 230, and one end of the connecting rod 300 is embedded in the eccentric shaft 240, and the two are rotatably connected. The other end of the connecting rod 300 is connected to the knife mounting assembly 400, and the rotation of the connecting rod 300 drives the knife mounting assembly 400 to move up and down;

[0050] The first counterweight plate 500 and the second counterweight plate 600 have one end respectively connected with the first eccentric block 120 and the second eccentric block 220, and the other end is provided with a plug-in connection hole and a connection shaft;

[0051] The counterweight slider 700 is located between the first counterweight plate 500 and the second counterweight plate 600, and one end of the counterweight slider 700 is embedded in the connecting shaft, and the other end is embedded in the counterweight sleeve 800, wherein the counterweight slider 700 is driven to move up and down in the counterweight sleeve 800 as the first counterweight plate 500 and the second counterweight plate 600 rotate;

[0052] Among them, one of the first rotating shaft 110 and the second rotating shaft 210 serves as the input shaft of the vibration cutting knife. When the first crankshaft 100 and the second crankshaft 200 rotate synchronously, the connecting rod 300, the first counterweight plate 500, and the second counterweight plate 600 can swing and rotate in the corresponding vertical planes respectively.

[0053] The present invention provides a vibrating cutter, wherein the first counterweight plate 500, the second counterweight plate 600 and the connecting rod 300 can swing and rotate in corresponding vertical planes, thereby achieving dynamic balance, thereby eliminating the noise generated by the vibrating cutter during high-frequency vibration and improving the cutting environment.

[0054] It is further pointed out that the first crankshaft 100 and the second crankshaft 200 can be arranged integrally to form an integral crankshaft structure. In this case, the crankshaft structure is symmetrically arranged, wherein the first eccentric mass 120 and the second eccentric mass 220, the first crank 130 and the second crank 230 are symmetrically distributed around the center of the crankshaft structure, and the first crank 130 and the second crank 230 are located between the first eccentric mass 120 and the second eccentric mass 220, and one end of the connecting rod 300 is located between the first crank 130 and the second crank 230, and is nested in the crankshaft structure.

[0055] It is further pointed out that the first eccentric mass 120 and the first crank 130 are arranged in a superimposed manner, and the second eccentric mass 220 and the second crank 230 are arranged in a superimposed manner. When the first counterweight plate 500 is nested on the first eccentric mass 120, the first counterweight plate 500 and the first crank 130 are isolated from each other by the gasket 900; when the second counterweight plate 600 is nested on the second eccentric mass 220, the second counterweight plate 600 and the second crank 230 are isolated from each other by the gasket 900.

[0056] It is worth mentioning that the first counterweight plate 500 and the second counterweight plate 600 are respectively nested in the corresponding first eccentric block 120 and the second eccentric block 220 through bearings, and the bearings are preferably needle bearings, so as to ensure the smoothness of the first counterweight plate 500 and the second counterweight plate 600 during the swinging and rotating process.

[0057] Preferably, the first crank 130 and one end of the connecting rod 300 nested with the eccentric shaft 240 are matched by a concave-convex fit; the second crank 230 and one end of the connecting rod 300 nested with the eccentric shaft 240 are matched by a concave-convex nesting fit.

[0058] It is worth mentioning that since the first crank 130 and the connecting rod 300, as well as the second crank 230 and the connecting rod 300 are nested in a concave and convex fit, this prevents relative movement of the connecting rod 300 and the first crank 130 and the second crank 230 when the first crankshaft 100 and the second crankshaft 200 rotate synchronously, thereby ensuring the synchronous rotation of the connecting rod 300 and the first crank 130 and the second crank 230.

[0059] It is further pointed out that a convex portion 310 is provided on the connecting rod 300, and a concave portion 132 is provided on the first crank 130 and the second crank 230, wherein the convex portion 310 and the concave portion 132 are both provided in a stepped shape.

[0060] In this embodiment, the convex portion 310 and the concave portion 132 are both arranged in a stepped shape, which can further ensure the synchronous rotation of the connecting rod 300 and the first crank 130 and the second crank 230 .

[0061] It is worth mentioning that the positions of the protrusion 310 and the recess 132 can be interchanged, that is, the recess 132 is disposed on the connecting rod 300 , and the protrusion 310 is disposed on the first crank 130 and the second crank 230 .

[0062] In addition, the connecting rod 300 is nested on the eccentric shaft 240 through a bearing, and the bearing is preferably a needle bearing.

[0063] Preferably, the axis of the first rotating shaft 110 is coaxially arranged with the axis of the second rotating shaft 210, and the first eccentric mass 120, the first counterweight plate 500, the first crank 130, the second eccentric mass 220, the second counterweight plate 600 and the second crank 230 are symmetrically distributed with the connecting rod 300 as the center, wherein the center of gravity of the structure composed of the first eccentric mass 120, the first counterweight plate 500, the first crank 130, the second eccentric mass 220, the second counterweight plate 600, the second crank 230 and the eccentric shaft 240 is located on the axis of the first rotating shaft 110 or the second rotating shaft 210, and the connecting rod 300 is nested on the eccentric shaft 240 through a bearing.

[0064] Preferably, the first crank 130 and the second crank 230 have the same shape and are both convexly arranged, and the edge of the first crank 130 includes a first arc 133 and a second arc 134, wherein the first arc 133 is an arc formed with the axis of the first rotating shaft 110 as the center, and the second arc 134 is an arc formed with the center of the first eccentric block 120 as the center, the diameter of the first arc 133 is greater than the diameter of the second arc 134, and the two ends of the first arc 133 and the two ends of the second arc 134 are smoothly transitioned through a transition arc, and the transition arc is arranged in an S shape.

[0065] Preferably, a first oil passage 135 is provided on a side surface of the first crank 130 facing away from the first eccentric block 120, and a second oil passage 136 is provided on the side of the first crank 130, wherein the first oil passage 135 is communicated with the second oil passage 136, and the first oil passage 135 located on the first crank 130 includes the eccentric hole 131, and the first oil passage 135 located on the second crank 230 includes the eccentric shaft 240, and the first oil passage 135 is arranged in a triangular shape.

[0066] In this embodiment, the first oil passage 135 and the second oil passage 136 serve as circulation passages for lubricating oil, thereby achieving lubrication of the vibration cutting blade.

[0067] Preferably, the first mounting hole 521 and the second mounting hole 531 are respectively provided at both ends of the first counterweight plate 500 and the second counterweight plate 600, and the sleeve 510 is inserted into the first mounting hole 521 on the first counterweight plate 500, the second mounting hole 531 on the first counterweight plate 500 is nested with the first eccentric block 120, the first mounting hole 521 on the second counterweight plate 600 is inserted with the pin 610, and the second mounting hole 531 on the second counterweight plate 600 is nested with the second eccentric block 220, wherein the connecting hole is provided on the sleeve 510, the connecting shaft is provided on the pin 610, and the sleeve 510 and the pin 610 are plug-fitted and locked by fasteners.

[0068] It is worth mentioning that a first plane 511 is arranged on the outer circumferential surface of the sleeve 510, and a first fixing hole 512 is arranged on the first plane 511; a second plane 611 is arranged on the outer circumferential surface of the pin shaft 610, and a second fixing hole 612 is arranged on the second plane 611; when the pin shaft 610 is inserted into the sleeve 510, the position of the first fixing hole 512 corresponds to the position of the second fixing hole 612, and the connection between the sleeve 510 and the pin shaft 610 is completed by fasteners.

[0069] Further preferably, the first counterweight plate 500 has the same structure as the second counterweight plate 600, and the first counterweight plate 500 includes a counterweight block 520 connected to the sleeve 510, and a shaft ring 530 nested with the first eccentric block 120, wherein the first mounting hole 521 is arranged on the counterweight block 520, the second mounting hole 531 is arranged on the shaft ring 530, and the counterweight block 520 is arranged in a convex shape, and both sides of the counterweight block 520 are respectively transitioned to the outer wall of the shaft ring 530 through circular arcs.

[0070] Further preferably, one end of the counterweight slider 700 is nested on the pin 610 through a bearing, and the bearing is preferably a needle bearing.

[0071] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. 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 invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected 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 the specific circumstances.

[0072] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0073] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vibrating cutting knife, characterized in that: include: A first crankshaft, wherein a first rotating shaft, a first eccentric block and a first crank are sequentially arranged along the axis direction of the first crankshaft, and an eccentric hole is arranged on the first crank, wherein the axis of the first rotating shaft is coaxially arranged with the axis of the first crank, and when the first eccentric block is projected onto the first crank, the center of the first eccentric block, the center of the first crank and the center of the eccentric hole are on the same straight line, and the center of the first crank is located between the center of the first eccentric block and the center of the eccentric hole; A second crankshaft, a second rotating shaft, a second eccentric block, a second crank and an eccentric shaft are sequentially arranged along the axial direction of the second crankshaft, and the eccentric shaft is plugged and matched with the eccentric hole, wherein the axis of the second rotating shaft is coaxially arranged with the axis of the second crank, and when the second eccentric block and the eccentric shaft are projected onto the second crank, the center of the second eccentric block, the center of the second crank and the center of the eccentric shaft are on the same straight line, and the center of the second crank is located between the center of the second eccentric block and the center of the eccentric shaft; A connecting rod is located between the first crank and the second crank, and one end of the connecting rod is embedded in the eccentric shaft, the two are rotatably connected, and the other end of the connecting rod is connected to the knife mounting assembly; The first counterweight plate and the second counterweight plate, one end of each of which is respectively nested and connected with the first eccentric block and the second eccentric block, and the other ends of each of which is connected through an axis hole; The counterweight slider is vertically arranged between the first counterweight plate and the second counterweight plate, and one end of the counterweight slider is nested in the connection between the first counterweight plate and the second counterweight plate; Among them, one of the first rotating shaft and the second rotating shaft serves as the input shaft of the vibration cutting knife. When the first crankshaft rotates synchronously with the second crankshaft, the connecting rod, the first counterweight plate and the second counterweight plate can swing and rotate in corresponding vertical planes respectively.

2. The vibration cutting blade according to claim 1, characterized in that: The first eccentric block is superimposed on the first crank, and the second eccentric block is superimposed on the second crank. When the first counterweight plate is nested on the first eccentric block, the first counterweight plate and the first crank are isolated by a gasket; when the second counterweight plate is nested on the second eccentric block, the second counterweight plate and the second crank are isolated by a gasket.

3. The vibration cutting blade according to claim 1, characterized in that: The first crank and one end of the connecting rod that is nested with the eccentric shaft are matched through a concave-convex fit; the second crank and one end of the connecting rod that is nested with the eccentric shaft are matched through a concave-convex nesting fit, wherein a convex portion is provided on the connecting rod, and a concave portion is provided on the first crank and the second crank, and the convex portion and the concave portion are arranged in a stepped shape.

4. The vibration cutting blade according to claim 1, characterized in that: The axis of the first rotating shaft is coaxially arranged with the axis of the second rotating shaft, and the first eccentric block, the first counterweight plate, the first crank, the second eccentric block, the second counterweight plate and the second crank are symmetrically distributed with the connecting rod as the center, wherein the center of gravity of the structure composed of the first eccentric block, the first counterweight plate, the first crank, the second eccentric block, the second counterweight plate, the second crank and the eccentric shaft is located on the axis of the first rotating shaft or the second rotating shaft, and the connecting rod is nested on the eccentric shaft through a bearing.

5. The vibration cutting blade according to claim 1, characterized in that: A first oil passage is provided on a surface of the first crank facing away from the first eccentric block, and a second oil passage is provided on the side of the first crank, wherein the first oil passage is connected to the second oil passage, and the first oil passage on the first crank includes the eccentric hole, and the first oil passage on the second crank includes the eccentric shaft.

6. The vibration cutting blade according to claim 1, characterized in that: The first and second mounting holes are respectively provided at both ends of the first counterweight plate and the second counterweight plate, and a sleeve is inserted into the first mounting hole on the first counterweight plate, and the second mounting hole on the first counterweight plate is nested with the first eccentric block, and a pin is inserted into the first mounting hole on the second counterweight plate, and the second mounting hole on the second counterweight plate is nested with the second eccentric block, wherein the sleeve and the pin are plugged into each other and locked by fasteners.

7. The vibration cutting blade according to claim 6, characterized in that: A first plane is arranged on the outer circumferential surface of the sleeve, and a first fixing hole is arranged on the first plane. A second plane is arranged on the outer circumferential surface of the pin shaft, and a second fixing hole is arranged on the second plane. When the pin shaft is inserted into the sleeve, the position of the first fixing hole corresponds to the position of the second fixing hole, and the connection between the sleeve and the pin shaft is completed by a fastener.

8. The vibration cutting blade according to claim 6, characterized in that: The first counterweight plate has the same structure as the second counterweight plate, and the first counterweight plate includes a counterweight block connected to the sleeve, and a shaft ring nested with the first eccentric block, wherein the first mounting hole is arranged on the counterweight block, the second mounting hole is arranged on the shaft ring, and the counterweight block is arranged in a convex shape, and both sides of the counterweight block are respectively transitioned to the outer wall of the shaft ring through circular arcs.

9. The vibrating cutter according to any one of claims 1 to 8, characterized in that: The first crankshaft and the second crankshaft are integrally arranged to form an axisymmetric structure, wherein the connecting rod is nested in the center position of the axisymmetric structure.

10. A cutting device, characterized in that: The invention comprises the vibrating cutting blade as claimed in any one of claims 1 to 9.

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