A two-stroke high-frequency vibration cutting tool

Abstract

The present invention provides a two-stroke high-frequency vibration cutting tool, belonging to the field of cutting technology, comprising: a vibration bracket; a motor mounted on the vibration bracket; a camshaft including a rotating shaft, one end of which is connected to the output end of the motor and the other end is connected with a bearing seat. Among them, a large cam and a small cam are arranged on the rotating shaft. A concave cavity is arranged on the large cam, and two strokes are arranged on the cavity wall of the concave cavity. The outer contour shape of the small cam is the same as the shape of the concave cavity; a stroke structure, one end of which is respectively in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam, and the other end is connected with a cutting tool; a counterweight structure, one end of which is respectively in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam, and the other end of the counterweight structure is connected with the vibration bracket. By setting two groups of strokes, the present invention increases the vibration frequency of the vibration cutting tool, thereby improving the cutting quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of cutting, and relates to a cutting tool, in particular to a two-stroke high-frequency vibration cutting tool. Background Art

[0002] Cutting tools are used to cut flexible materials such as cardboard or fabric, and high-frequency vibration cutting tools are given high-frequency vibration on the basis of cutting tools, and the high-frequency vibration comes from the output of the motor. That is, the up-and-down vibration of the cutting tool is realized by the rotation of the output end of the motor, so as to achieve the purpose of cutting. As the rotation speed increases, the vibration frequency of the cutting tool increases accordingly, and there is a direct proportional relationship between the rotation speed and the vibration frequency.

[0003] However, according to the prior art, the maximum rotation speed of the motor is constant. When the motor reaches the maximum rotation speed, the cutting tool reaches the maximum vibration frequency. At this time, 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 rotation speed, it is easy to cause damage to the motor and affect the service life of the motor. Summary of the Invention

[0004] The object of the present invention is to address the above problems in the existing technology and propose a two-stroke high-frequency vibration cutting tool that can increase the vibration frequency without replacing the motor and has a long service life.

[0005] The object of the present invention can be achieved by the following technical solutions: A two-stroke high-frequency vibration cutting tool, comprising:

[0006] A vibration bracket, serving as a carrier;

[0007] A motor, installed on the vibration bracket, serving as a power source;

[0008] A camshaft, including a rotating shaft, one end of the rotating shaft is connected to the output end of the motor, and the other end of the rotating shaft is connected to a bearing seat. Among them, two cams integrally provided with the rotating shaft on the rotating shaft are a large cam and a small cam respectively. A concave cavity is provided on the large cam, and two strokes are provided on the cavity wall of the concave cavity. Each stroke includes a wave peak and a wave valley, and the wave peaks and wave valleys of the two strokes are connected end to end and arranged at intervals. The outer contour shape of the small cam is the same as the shape of the concave cavity, and the wave peaks on the outer contour of the small cam correspond to the wave peaks on the cavity wall of the concave cavity. The difference between the radius of the large cam and the radius of the small cam passing through the center of the wheel at all the same positions is equal. The wave valleys on the outer contour of the small cam correspond to the wave valleys on the cavity wall of the concave cavity;

[0009] A stroke structure, one end of which is respectively in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam, and the other end is connected to a cutting tool;

[0010] The counterweight structure is distributed vertically with the stroke structure along the axis perpendicular to the rotating shaft. One end of the counterweight structure is in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam respectively, and the other end of the counterweight structure is connected to the vibration bracket;

[0011] Among them, through the rotation of the camshaft, the stroke structure and the counterweight structure approach or move away from each other. When the stroke structure and the counterweight structure approach each other, the camshaft is subjected to the pressure of the stroke structure and the counterweight structure towards each other and with equal magnitude; when the stroke structure and the counterweight structure move away from each other, the stroke structure and the counterweight structure are respectively subjected to the pressure of the camshaft in the opposite direction and with equal magnitude.

[0012] In the above two-stroke high-frequency vibration cutting tool, both the concave cavity and the small cam are elliptical. Among them, the difference between the major axis and the minor axis in the concave cavity is 1 mm, and the difference between the major axis and the minor axis of the outer contour of the small cam is 1 mm.

[0013] In the above two-stroke high-frequency vibration cutting tool, the stroke structure includes a push rod, one end is connected to the cutting tool, and the other end is provided with two stroke rollers, and the two stroke rollers are on the same horizontal line. One of the stroke rollers is in rolling cooperation with the cavity wall of the concave cavity, and the other stroke roller is in rolling cooperation with the outer contour of the small cam; the counterweight structure includes a counterweight block, one end is connected to the vibration bracket, and the other end is provided with two counterweight rollers, and the two counterweight rollers are on the same horizontal line. One of the counterweight rollers is in rolling cooperation with the cavity wall of the concave cavity, and the other counterweight roller is in rolling cooperation with the outer contour of the small cam. Among them, when the stroke structure and the counterweight structure approach each other, the stroke roller on the cavity wall of the concave cavity approaches the counterweight roller on the cavity wall of the concave cavity, and at the same time the stroke roller on the outer contour of the small cam approaches the counterweight roller on the outer contour of the small cam; when the stroke structure and the counterweight structure move away from each other, the stroke roller on the cavity wall of the concave cavity moves away from the counterweight roller on the cavity wall of the concave cavity, and at the same time the stroke roller on the outer contour of the small cam moves away from the counterweight roller on the outer contour of the small cam.

[0014] In the above two-stroke high-frequency vibration cutting tool, when the stroke structure and the counterweight structure approach each other, the stroke roller and the counterweight roller in rolling cooperation with the cavity wall of the concave cavity respectively roll to the trough position of the cavity wall of the concave cavity, and at the same time the stroke roller and the counterweight roller in rolling cooperation with the outer contour of the small cam respectively roll to the trough position of the outer contour of the small cam. Among them, the pressure direction of the stroke roller on the camshaft and the pressure direction of the counterweight roller on the camshaft both point to the axis of the camshaft, and the pressure magnitudes are equal; when the stroke structure and the counterweight structure move away from each other, the stroke roller and the counterweight roller in rolling cooperation with the cavity wall of the concave cavity respectively roll to the peak position of the cavity wall of the concave cavity, and at the same time the stroke roller and the counterweight roller in rolling cooperation with the outer contour of the small cam respectively roll to the peak position of the outer contour of the small cam. Among them, the pressure direction of the camshaft on the stroke roller and the pressure direction of the camshaft on the counterweight roller both deviate from the axis of the camshaft, and the pressure magnitudes are equal.

[0015] In the above-mentioned two-stroke high-frequency vibration cutting tool, the stroke roller and the counterweight roller that are in rolling cooperation with the cavity wall of the concave cavity are located in the same vertical plane, and the stroke roller and the counterweight roller that are in rolling cooperation with the outer contour of the small cam are located in the same vertical plane. Among them, when the stroke structure and the counterweight structure approach each other, the relative distance between the corresponding stroke roller and the counterweight roller decreases; when the stroke structure and the counterweight structure move away from each other, the relative distance between the corresponding stroke roller and the counterweight roller increases.

[0016] In the above-mentioned two-stroke high-frequency vibration cutting tool, the push rod used to connect one end of the stroke roller is clamped between two stroke rollers, and the two stroke rollers are connected to the push rod through bearing pins; the counterweight block used to connect one end of the counterweight roller is clamped between two counterweight rollers, and the two counterweight rollers are connected to the counterweight block through bearing pins. Among them, the large cam is on the side close to the motor output end, and the small cam is on the side close to the bearing seat.

[0017] In the above-mentioned two-stroke high-frequency vibration cutting tool, the counterweight block is arranged in an L shape, and the side of the counterweight block perpendicular to the axis direction of the camshaft is clamped between two counterweight rollers. The other side of the counterweight block is connected with a counterweight guide rod. Among them, the counterweight guide rod is fixedly connected to the counterweight block through an open circlip, a linear guide rail is nested on the counterweight guide rod, and the linear guide rail is nested and matched with the vibration bracket.

[0018] In the above-mentioned two-stroke high-frequency vibration cutting tool, a guiding structure is further arranged on the vibration bracket, and the guiding structure includes two pulley seats connected side by side to the vibration bracket. Among them, a guiding wheel is connected to each pulley seat through a pulley pin shaft, and the push rod at the end connected to the stroke roller is clamped between two guiding wheels.

[0019] In the above-mentioned two-stroke high-frequency vibration cutting tool, the bearing pins for installing the stroke rollers on the push rod and the two pulley pins connected to the pulley seats form a triangular pyramid structure.

[0020] In the above-mentioned two-stroke high-frequency vibration cutting tool, both ends of the rotating shaft are arranged in a stepped shape, bearings are nested at both ends of the rotating shaft, and a bearing cover is nested at the end of the rotating shaft connected to the motor output end. Among them, the camshaft is clamped between the bearing cover and the bearing seat.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1). A two-stroke high-frequency vibration cutting tool provided by the present invention increases the vibration frequency of the vibration cutting tool by setting two sets of strokes, thereby improving the cutting quality. In addition, by setting a weight balancing structure, the pressure on the camshaft during the up-and-down movement of the stroke structure can be offset, thereby reducing the noise generated during the up-and-down movement of the stroke structure.

[0023] (2). By setting a guiding structure and clamping one end of the push rod between two guiding wheels, radial wobbling of the push rod during the up-and-down movement is prevented, thereby improving the reliability of the vibration cutting tool during cutting.

[0024] (3). The heat generated by the push rod under high-frequency vibration can be dissipated in time by the fan, extending the service life of the push rod. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a two-stroke high-frequency vibration cutting tool of the present invention.

[0026] Figure 2 is Figure 1 a schematic partial structure diagram of the vibration cutting tool shown Figure 1 .

[0027] Figure 3 is Figure 1 a schematic partial structure diagram of the vibration cutting tool shown Figure 2 .

[0028] Figure 4 is Figure 1 a schematic partial structure diagram of the vibration cutting tool shown Figure 3 .

[0029] Figure 5 is a schematic structural diagram of the camshaft in a preferred embodiment of the present invention.

[0030] In the figure, 100, vibration bracket; 200, motor; 300, camshaft; 310, rotating shaft; 320, large cam; 321, concave cavity; 322, wave peak; 323, wave valley; 330, small cam; 340, bearing cover; 400, bearing seat; 500, stroke structure; 510, push rod; 520, stroke roller; 530, bearing pin; 600, cutting tool; 700, weight balancing structure; 710, weight block; 720, weight roller; 730, weight guiding rod; 740, snap ring; 750, linear guide; 800, guiding structure; 810, wheel seat; 820, wheel pin; 830, guiding wheel; 900, fan. Detailed Embodiments

[0031] The following are specific embodiments of the present invention, in conjunction with the accompanying drawings, to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] As Figures 1 to 5 shown, a two-stroke high-frequency vibration cutting tool provided by the present invention includes:

[0034] A vibration bracket 100, serving as a carrier;

[0035] A motor 200, installed on the vibration bracket 100, serving as a power source;

[0036] A camshaft 300, including a rotating shaft 310, and one end of the rotating shaft 310 is connected to the output end of the motor 200, and the other end of the rotating shaft 310 is connected to a bearing seat 400. Among them, two cams integrally provided with the rotating shaft 310 on the rotating shaft 310 are respectively a large cam 320 and a small cam 330. A concave cavity 321 is provided on the large cam 320, and two strokes are provided on the cavity wall of the concave cavity 321. Each stroke includes a wave peak 322 and a wave valley 323, and the wave peaks 322 and wave valleys 323 of the two strokes are connected end to end and arranged at intervals. The outer contour shape of the small cam 330 is the same as the shape of the concave cavity 321, and the wave peak 322 on the outer contour of the small cam 330 corresponds to the wave peak 322 on the cavity wall of the concave cavity 321. The difference between the radius of the large cam and the radius of the small cam passing through the center of the wheel at all the same positions is equal. The wave valley 323 on the outer contour of the small cam 330 corresponds to the wave valley 323 on the cavity wall of the concave cavity 321;

[0037] A stroke structure 500, one end of which is respectively in rolling cooperation with the cavity wall of the concave cavity 321 and the outer contour of the small cam 330, and the other end is connected to a cutting tool 600;

[0038] A weight structure 700, distributed up and down with the stroke structure 500 along the axis direction perpendicular to the rotating shaft 310. One end of the weight structure 700 is respectively in rolling cooperation with the cavity wall of the concave cavity 321 and the outer contour of the small cam 330, and the other end of the weight structure 700 is connected to the vibration bracket 100;

[0039] Among them, through the rotation of the camshaft 300, the stroke structure 500 and the counterweight structure 700 approach or move away from each other. When the stroke structure 500 and the counterweight structure 700 approach each other, the camshaft 300 is subjected to pressures from the stroke structure 500 and the counterweight structure 700 that are opposite in direction and equal in magnitude. When the stroke structure 500 and the counterweight structure 700 move away from each other, the stroke structure 500 and the counterweight structure 700 are respectively subjected to pressures from the camshaft 300 that are opposite in direction and equal in magnitude.

[0040] A two-stroke high-frequency vibration cutting tool provided by the present invention increases the vibration frequency of the vibration cutting tool by setting two sets of strokes, thereby improving the cutting quality. In addition, by setting the counterweight structure 700, the pressure on the camshaft 300 caused by the up-and-down movement of the stroke structure 500 can be offset, thereby reducing the noise generated during the up-and-down movement of the stroke structure 500.

[0041] Further preferably, both the concave cavity 321 and the small cam 330 are elliptically arranged. Among them, the difference between the major axis and the minor axis in the concave cavity 321 is 1 mm, and the difference between the major axis and the minor axis of the outer contour of the small cam 330 is 1 mm.

[0042] Preferably, the stroke structure 500 includes a push rod 510. One end is connected to the cutting tool 600, and the other end is provided with two stroke rollers 520, and the two stroke rollers 520 are located on the same horizontal line. One of the stroke rollers 520 is in rolling cooperation with the cavity wall of the concave cavity 321, and the other stroke roller 520 is in rolling cooperation with the outer contour of the small cam 330; the counterweight structure 700 includes a counterweight block 710. One end is connected to the vibration bracket 100, and the other end is provided with two counterweight rollers 720, and the two counterweight rollers 720 are located on the same horizontal line. One of the counterweight rollers 720 is in rolling cooperation with the cavity wall of the concave cavity 321, and the other counterweight roller 720 is in rolling cooperation with the outer contour of the small cam 330. Among them, when the stroke structure 500 and the counterweight structure 700 approach each other, the stroke roller 520 on the cavity wall of the concave cavity 321 approaches the counterweight roller 720 on the cavity wall of the concave cavity 321, and at the same time, the stroke roller 520 on the outer contour of the small cam 330 approaches the counterweight roller 720 on the outer contour of the small cam 330; when the stroke structure 500 and the counterweight structure 700 move away from each other, the stroke roller 520 on the cavity wall of the concave cavity 321 moves away from the counterweight roller 720 on the cavity wall of the concave cavity 321, and at the same time, the stroke roller 520 on the outer contour of the small cam 330 moves away from the counterweight roller 720 on the outer contour of the small cam 330.

[0043] Further preferably, when the stroke structure 500 and the counterweight structure 700 approach each other, the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the cavity wall of the concave cavity 321 respectively roll to the trough 323 position of the cavity wall of the concave cavity 321, and at the same time, the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the outer contour of the small cam 330 respectively roll to the trough 323 position of the outer contour of the small cam 330. Among them, the pressure directions of the stroke roller 520 and the counterweight roller 720 with respect to the camshaft 300 both point to the axis of the camshaft 300, and the magnitudes of the pressures are equal; when the stroke structure 500 and the counterweight structure 700 move away from each other, the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the cavity wall of the concave cavity 321 respectively roll to the peak 322 position of the cavity wall of the concave cavity 321, and at the same time, the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the outer contour of the small cam 330 respectively roll to the peak 322 position of the outer contour of the small cam 330. Among them, the pressure directions of the camshaft 300 with respect to the stroke roller 520 and the camshaft 300 with respect to the counterweight roller 720 both deviate from the axis of the camshaft 300, and the magnitudes of the pressures are equal.

[0044] Further preferably, the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the cavity wall of the concave cavity 321 are located in the same vertical plane, and the stroke roller 520 and the counterweight roller 720 that are in rolling engagement with the outer contour of the small cam 330 are located in the same vertical plane. Among them, when the stroke structure 500 and the counterweight structure 700 approach each other, the relative distance between the corresponding stroke roller 520 and the counterweight roller 720 decreases; when the stroke structure 500 and the counterweight structure 700 move away from each other, the relative distance between the corresponding stroke roller 520 and the counterweight roller 720 increases.

[0045] Further preferably, the push rod 510 used to connect one end of the stroke roller 520 is clamped between two stroke rollers 520, and the two stroke rollers 520 are connected to the push rod 510 through a bearing pin 530; the counterweight block 710 used to connect one end of the counterweight roller 720 is clamped between two counterweight rollers 720, and the two counterweight rollers 720 are connected to the counterweight block 710 through a bearing pin 530. Among them, the large cam 320 is close to the output end of the motor 200, and the small cam 330 is close to the bearing seat 400.

[0046] Further preferably, both ends of the rotating shaft 310 are arranged in a stepped shape, bearings are nested at both ends of the rotating shaft 310, and a bearing cover 340 is nested at one end of the rotating shaft 310 connected to the output end of the motor 200. Among them, the camshaft 300 is clamped between the bearing cover 340 and the bearing seat 400 to limit the degree of freedom of the camshaft 300 along its axis direction.

[0047] Further preferably, the counterweight 710 is arranged in an L shape, and one side of the counterweight 710 perpendicular to the axis direction of the camshaft 300 is clamped between two counterweight rollers 720. The other side of the counterweight 710 is connected with a counterweight guide rod 730. Among them, the counterweight guide rod 730 is fixedly connected to the counterweight 710 through a snap ring 740, a linear guide rail 750 is nested on the counterweight guide rod 730, and the linear guide rail 750 is nested and matched with the vibration bracket 100.

[0048] Preferably, a guiding structure 800 is further arranged on the vibration bracket 100, and the guiding structure 800 includes two roller seats 810 connected side by side to the vibration bracket 100. Among them, a guiding wheel 830 is connected to each roller seat 810 through a roller pin 820, and one end of the push rod 510 connected to the stroke roller 520 is clamped between the two guiding wheels 830.

[0049] It is worth mentioning that by arranging the guiding structure 800 and clamping one end of the push rod 510 between the two guiding wheels 830, radial shaking of the push rod 510 is prevented during the up and down movement, thereby improving the reliability of the vibrating cutting tool during cutting.

[0050] Further preferably, the stroke roller 520 is installed on the bearing pin 530 of the push rod 510, and forms a triangular pyramid structure with two roller pins connected to the roller seat 810.

[0051] Preferably, fans 900 are installed on both the bearing seat 400 and the vibration bracket 100, and the air outlet directions of the two fans 900 are perpendicular to each other. Among them, the fan 900 installed on the bearing seat 400 is located in the axis direction of the rotating shaft 310, and the fan 900 installed on the vibration bracket 100 is located in the radial direction of the rotating shaft 310.

[0052] In this embodiment, the heat generated by the push rod 510 under high-frequency vibration can be dissipated in time through the fan 900, extending the service life of the push rod 510.

[0053] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A two-stroke high-frequency vibration cutting tool, characterized in that, Comprising: A vibration support, serving as a carrier; A motor, mounted on the vibration support and serving as a power source; A camshaft, including a rotating shaft, with one end of the rotating shaft connected to the output end of the motor and the other end connected to a bearing block. Among them, two cams integrally provided with the rotating shaft on the rotating shaft are respectively a large cam and a small cam. A concave cavity is provided on the large cam, and two strokes are provided on the cavity wall of the concave cavity. Each stroke includes a wave crest and a wave trough, and the wave crests and wave troughs of the two strokes are connected end to end and arranged at intervals. The outer contour shape of the small cam is the same as the shape of the concave cavity, and the wave crest on the outer contour of the small cam corresponds to the wave crest on the cavity wall of the concave cavity. The difference between the radius of the large cam and the radius of the small cam passing through the center of the wheel at all the same positions is equal. The wave trough on the outer contour of the small cam corresponds to the wave trough on the cavity wall of the concave cavity; A stroke structure, with one end respectively in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam, and the other end connected to a cutting tool; A counterweight structure, distributed up and down with the stroke structure along the direction perpendicular to the axis of the rotating shaft. One end of the counterweight structure is respectively in rolling cooperation with the cavity wall of the concave cavity and the outer contour of the small cam, and the other end of the counterweight structure is connected to the vibration support; Among them, through the rotation of the camshaft, the stroke structure and the counterweight structure approach or move away from each other. When the stroke structure and the counterweight structure approach each other, the camshaft is subjected to opposite and equal pressures from the stroke structure and the counterweight structure; when the stroke structure and the counterweight structure move away from each other, the stroke structure and the counterweight structure are respectively subjected to opposite and equal pressures from the camshaft.

2. The two-stroke high-frequency vibration cutting tool according to claim 1, wherein Both the concave cavity and the small cam are elliptically arranged. Among them, the difference between the major axis and the minor axis in the concave cavity is 1 mm, and the difference between the major axis and the minor axis of the outer contour of the small cam is 1 mm.

3. The two-stroke high-frequency vibration cutting tool according to claim 1, wherein The stroke structure includes a push rod, with one end connected to the cutting tool and the other end provided with two stroke rollers, and the two stroke rollers are located on the same horizontal line. One of the stroke rollers is in rolling cooperation with the cavity wall of the concave cavity, and the other stroke roller is in rolling cooperation with the outer contour of the small cam; the counterweight structure includes a counterweight block, with one end connected to the vibration support and the other end provided with two counterweight rollers, and the two counterweight rollers are located on the same horizontal line. One of the counterweight rollers is in rolling cooperation with the cavity wall of the concave cavity, and the other counterweight roller is in rolling cooperation with the outer contour of the small cam. Among them, when the stroke structure and the counterweight structure approach each other, the stroke roller on the cavity wall of the concave cavity approaches the counterweight roller on the cavity wall of the concave cavity, and at the same time, the stroke roller on the outer contour of the small cam approaches the counterweight roller on the outer contour of the small cam; when the stroke structure and the counterweight structure move away from each other, the stroke roller on the cavity wall of the concave cavity moves away from the counterweight roller on the cavity wall of the concave cavity, and at the same time, the stroke roller on the outer contour of the small cam moves away from the counterweight roller on the outer contour of the small cam.

4. A two-stroke high-frequency vibration cutting tool according to claim 3, characterized in that, When the stroke structure and the counterweight structure approach each other, the stroke roller and the counterweight roller that are in rolling engagement with the cavity wall of the concave cavity respectively roll to the trough positions of the cavity wall of the concave cavity, and at the same time, the stroke roller and the counterweight roller that are in rolling engagement with the outer contour of the small cam respectively roll to the trough positions of the outer contour of the small cam. Among them, the pressure direction of the stroke roller on the camshaft and the pressure direction of the counterweight roller on the camshaft both point to the axis of the camshaft, and the pressure magnitudes are equal; when the stroke structure and the counterweight structure move away from each other, the stroke roller and the counterweight roller that are in rolling engagement with the cavity wall of the concave cavity respectively roll to the peak positions of the cavity wall of the concave cavity, and at the same time, the stroke roller and the counterweight roller that are in rolling engagement with the outer contour of the small cam respectively roll to the peak positions of the outer contour of the small cam. Among them, the pressure direction of the camshaft on the stroke roller and the pressure direction of the camshaft on the counterweight roller both deviate from the axis of the camshaft, and the pressure magnitudes are equal.

5. The two-stroke high-frequency vibration cutting tool according to claim 3, characterized in that, The stroke roller and the counterweight roller that are in rolling engagement with the cavity wall of the concave cavity are located in the same vertical plane, and the stroke roller and the counterweight roller that are in rolling engagement with the outer contour of the small cam are located in the same vertical plane. Among them, when the stroke structure and the counterweight structure approach each other, the relative distance between the corresponding stroke roller and the counterweight roller decreases; when the stroke structure and the counterweight structure move away from each other, the relative distance between the corresponding stroke roller and the counterweight roller increases.

6. A two-stroke high-frequency vibration cutting tool according to claim 3, characterized in that, The push rod used to connect one end of the stroke roller is clamped between the two stroke rollers, and the two stroke rollers are connected to the push rod through bearing pins; the counterweight block used to connect one end of the counterweight roller is clamped between the two counterweight rollers, and the two counterweight rollers are connected to the counterweight block through the bearing pins. Among them, the large cam is on the side close to the output end of the motor, and the small cam is on the side close to the bearing seat.

7. A two-stroke high-frequency vibration cutting tool according to claim 3, characterized in that, The counterweight block is arranged in an L shape, and the side of the counterweight block perpendicular to the axis direction of the camshaft is clamped between the two counterweight rollers. The other side of the counterweight block is connected with a counterweight guide rod. Among them, the counterweight guide rod is fixedly connected to the counterweight block through a snap ring, and a linear guide rail is nested on the counterweight guide rod, and this linear guide rail is nested and matched with the vibration bracket.

8. A two-stroke high-frequency vibration cutting tool according to claim 6, characterized in that The vibration bracket is also provided with a guiding structure, and this guiding structure includes two wheel seat holders connected side by side to the vibration bracket. Among them, each wheel seat holder is connected with a guiding wheel through a guiding wheel pin shaft, and the push rod at the end connected to the stroke roller is clamped between the two guiding wheels.

9. A two-stroke high-frequency vibration cutting tool according to claim 8, characterized in that, The bearing pin that installs the stroke roller on the push rod and the two guiding wheel pins connected to the wheel seat holder form a triangular pyramid structure.

10. A two-stroke high-frequency vibration cutting tool according to claim 1, characterized in that, Both ends of the rotating shaft are arranged in a stepped shape, and bearings are nested at both ends of the rotating shaft. And a bearing cover is nested at one end of the rotating shaft connected to the output end of the motor. Among them, the camshaft is clamped between the bearing cover and the bearing seat.

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