High-frequency pneumatic cutter

Abstract

The high-frequency pneumatic cutter comprises a shell, an air inlet assembly, a movement assembly, a cutter head arranged at the front end of the movement assembly and an exhaust assembly are installed in the shell, the movement assembly comprises a high-speed air inlet valve, a cylinder body, a punch piston installed in an inner cavity of the cylinder body and an air control body, and an air inlet conversion opening is formed between the high-speed air inlet valve and the shell. An air inlet is formed between the air control body and the shell, the punch piston is provided with a weight reduction groove, and the upper end and the lower end of the cylinder body are protrusions or grooves attached to the weight reduction groove. The weight of the piston is reduced, rigidity is kept unchanged, the movement speed and responsiveness of the piston can be improved, the protrusions or the grooves matched with the weight reduction grooves are arranged, the gas storage space is effectively reduced, the gas compression space is reduced in the stroke movement of the piston, larger thrust is generated through smaller gas flow volume, and the piston is more stable in stroke movement. The time for pushing the piston is shortened, the gas consumption is reduced, the vibration frequency is greatly improved, the vibration frequency can reach 17000 times, and the requirement for high-efficiency production is met.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic knives, in particular to a high-frequency pneumatic knife. Background Art

[0002] Vibrating knives are mainly used for cutting flexible materials. Currently, many industries on the market use electric vibrating knives, which have a simple structure but short amplitude, a stroke of only 1mm, and a small cutting force. They are mainly used in the clothing industry or the advertising industry, and are suitable for lightweight, thin flexible materials such as cloth and paper. However, in the leather cutting industry, several layers of materials are often cut together, which requires an amplitude stroke of more than 8mm and a greater cutting force. As a result, pneumatic knives have emerged, which are driven by high-pressure gas and can provide greater cutting force. They are suitable for cutting thicker materials or multi-layer materials, such as leather, rubber, and plastic. At present, the vibration frequency of pneumatic knives does not exceed 13,000 times under an air pressure of 0.7 MPa, which cannot meet certain high-efficiency production needs. For example, some leather cutting scenarios that require higher cutting frequencies may not be met, and a higher vibration frequency is required to ensure cutting speed and production efficiency. Summary of the invention

[0003] The object of the present invention is to provide a high-frequency pneumatic knife to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-frequency pneumatic knife, comprising a shell, in which an air intake assembly for introducing high-pressure gas, a moving assembly driven by the high-pressure gas to perform reciprocating motion, a knife head arranged at the front end of the moving assembly and moving up and down with the moving assembly, and an exhaust assembly for guiding the gas to be discharged, the moving assembly comprising a high-speed air intake valve, a cylinder body, a plunger piston installed in the inner cavity of the cylinder body, and an air control body, a cover plate is arranged between the high-speed air intake valve and the plunger piston, the air control body is arranged under the cover plate, an air intake conversion port is formed between the high-speed air intake valve and the shell, an air intake port is formed between the air control body and the shell, the plunger piston is provided with a weight reduction groove, and the upper and lower ends of the cylinder body are protrusions or grooves that fit the weight reduction groove.

[0005] Furthermore, the weight-reducing groove is an arc-shaped structure.

[0006] Furthermore, the air intake conversion port includes a main port and a side port, the air intake port includes an upper air intake port and a lower air intake port, the gap between the inner wall of the buffer sleeve and the outer wall of the high-speed intake valve forms a first air intake channel for gas circulation, and the inner wall of the buffer sleeve and the outside of the air control body form a second air intake channel for gas circulation, the first air intake channel is connected to the main port and the upper air intake port, the second air intake channel is connected to the side port and the lower air intake port, and the second air intake channel is connected to or disconnected from the first air intake channel through the reciprocating movement of the high-speed intake valve.

[0007] Furthermore, the air intake assembly includes a pipe joint and an air intake nozzle, and the air intake nozzle is arranged at the bottom of the pipe joint.

[0008] Furthermore, the cutter head includes a guide block, a cutter clamping block slidably matched with the guide block, and a cutter blade. The cutter clamping block is connected to the bottom of the motion component and is connected to the cutter blade.

[0009] Furthermore, the exhaust assembly includes an exhaust sleeve, an exhaust port is formed between the exhaust sleeve and the shell, and the exhaust port is provided with a muffler.

[0010] Furthermore, the gap on the inner wall of the buffer sleeve forms an exhaust channel for gas circulation, and the exhaust channel is connected to the exhaust port.

[0011] Furthermore, a mounting sleeve is provided on the shell, and the pneumatic knife is fixed on the knife seat through the mounting sleeve.

[0012] Furthermore, a shock absorbing assembly is arranged between the moving assembly and the shell, and the shock absorbing assembly includes a buffer sleeve, a spring and a guide ring. The guide ring is clamped in the shell, and the buffer sleeve is assembled as a whole with the moving assembly and suspended with the shell through the guide ring. The spring is installed between the buffer sleeve and the shell.

[0013] Furthermore, the guide ring is arranged between the air intake assembly and the motion assembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention drives the motion component to reciprocate at high speed through high-pressure gas, driving the tool to perform efficient vibration cutting. By providing a weight-reducing groove on the piston, the weight of the piston is reduced while maintaining the rigidity unchanged, which helps to improve the movement speed and responsiveness of the piston. By providing a protrusion or groove adapted to the weight-reducing groove on the cylinder body, the gas storage space is effectively reduced, and the space for compressed gas is reduced during the stroke movement of the piston. A smaller airflow volume generates a greater thrust, shortens the time to push the piston, reduces gas consumption, and greatly improves the vibration frequency, which can reach 17,000 times, meeting the needs of high-efficiency production;

[0016] 2. The vibration caused by the movement of the moving components is effectively reduced by the shock-absorbing component, so that the tool has almost no vibration, improving the cutting quality and tool life. The pneumatic knife has a relatively simple structure, low maintenance cost, high reliability, and is also equipped with a muffler to effectively reduce noise during operation and provide a better working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the high-frequency pneumatic knife of the present invention;

[0018] Figure 2 for Figure 1 AA section view along the middle line;

[0019] Figure 3 It is a schematic diagram of the structure when the piston moves upward and cooperates with the cylinder body;

[0020] Figure 4 It is a schematic diagram of the structure of the piston cooperating with the cylinder body when the piston moves downward;

[0021] Figure 5 It is a schematic diagram of the structure of the high-frequency pneumatic knife of the present invention after the piston moves upward;

[0022] Figure 6 for Figure 5 Cross-sectional view along the middle line BB;

[0023] In the figure, 100-shell, 101-mounting sleeve, 1-intake assembly, 11-pipe joint, 12-intake nozzle, 2-motion assembly, 21-high-speed intake valve, 211-main port, 212-side port, 22-ram piston, 221-piston head, 222-piston rod, 223-weight reduction groove, 23-gas control body, 231-upper air inlet, 232-lower air inlet, 24-cover plate, 25-cylinder body, 251-protrusion, 252-groove, 3-cutter head, 31-guide block, 32-cutter block, 33-blade, 4-exhaust assembly, 41-exhaust sleeve, 42-exhaust port, 43-muffler, 51-buffer sleeve, 511-first air inlet channel, 512-second air inlet channel, 513-exhaust channel, 52-spring, 53-guide ring, and arrows indicate the air inlet and outlet directions of the gas. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 to Figure 6As shown, this embodiment provides a high-frequency pneumatic knife, including a shell 100, in which an air intake component 1 for introducing high-pressure gas, a motion component 2 driven by high-pressure gas to reciprocate, a knife head 3 arranged at the front end of the motion component 2 and moving up and down with the motion component 2, an exhaust component 4 for guiding gas exhaust, and a shock-absorbing component are installed. A mounting sleeve 101 is provided on the shell 100, and the pneumatic knife is fixed to the knife seat through the mounting sleeve 101. The shock-absorbing component includes a buffer sleeve 51, a spring 52 and a guide ring 53, and the guide ring 53 is clamped in the shell 100. The buffer sleeve 51 is assembled with the motion component 2 as a whole, and is suspended and installed with the shell 100 through the guide ring 53. In this embodiment, the shell 1 00 is provided with a first annular groove on the inner wall, and a second annular groove is provided on the outer wall of the buffer sleeve 51. The guide ring 53 is respectively clamped in the first annular groove and the second annular groove. The spring 52 includes two springs, which are respectively arranged at the upper and lower parts of the housing 100. One end of the upper spring 52 is connected to the upper part of the housing 100, and the other end is connected to the upper end of the buffer sleeve 51. One end of the lower spring 52 is connected to the lower part of the housing 100, and the other end is connected to the lower end of the buffer sleeve 51. In this way, the upper and lower ends of the buffer sleeve 51 are each supported by a spring 52 to eliminate the vibration caused by the movement of the moving component. The moving component 2 includes a high-speed intake valve 21, a cylinder body 25, a plunger piston 22 installed in the cylinder body 25, and an air control body 23. The high-speed intake valve 21 and the plunger piston 22 are connected to the lower part of the housing 100. A cover plate 24 is arranged between the rod piston 22, and the air control body 23 is arranged under the cover plate 24. An air intake conversion port is formed between the high-speed air intake valve 21, the buffer sleeve 51 and the shell 100, and an air intake port is formed between the air control body 23, the buffer sleeve 51 and the shell 100. The air intake conversion port includes a main port 211 and a side port 212. The main port 211 is connected to the air intake nozzle 12. The air intake port includes an upper air intake port 231 and a lower air intake port 232. The gap between the inner wall of the buffer sleeve 51 and the outer wall of the high-speed air intake valve 21 forms a first air intake channel 511 for gas circulation, and the inner wall of the buffer sleeve 51 and the outside of the air control body 23 form a second air intake channel 512 for gas circulation. The first air intake channel 51 1 is connected with the main port 211 and the upper air inlet 231, the second air inlet channel 512 is connected with the side port 212 and the lower air inlet 232, the second air inlet channel 512 is connected with or disconnected from the first air inlet channel 511 through the reciprocating movement of the high-speed air inlet valve 21, the guide ring 53 is arranged between the air inlet nozzle 12 and the gas conversion port, the plunger piston 22 includes a piston head 221 and a piston rod 222, and the connecting surface of the piston head 221 and the piston rod 222 is provided with a weight reduction groove 223, the weight reduction groove 223 is an arc structure, which reduces the weight of the piston while maintaining the rigidity unchanged, which is helpful to improve the movement speed and responsiveness of the piston, the upper end and the lower end of the cylinder body 25 are respectively formed with a protrusion 251 or a groove 252 that fits with the weight reduction groove 223, as shown in FIG. Figure 3 As shown, when the punch piston 22 moves to the upper end of the cylinder body 25, the weight reduction groove 223 fits with the protrusion 251, and there is no gap between the punch piston 22 and the upper end of the cylinder body 25, or the gap is very small, such as Figure 4 As shown, when the punch piston 22 moves to the lower end of the cylinder body 25, the weight reduction groove 223 fits with the groove 252, and there is no gap between the punch piston 22 and the lower end of the cylinder body 25, or the gap is very small, which effectively reduces the gas storage space, reduces the space for compressed gas during the stroke movement of the punch piston 22, and generates greater thrust with less airflow volume, shortens the time for pushing the piston, reduces gas consumption, and greatly improves the vibration frequency, which can reach 17,000 times;

[0026] The air intake assembly 1 comprises a pipe joint 11 and an air intake nozzle 12, wherein the air intake nozzle 12 is arranged at the bottom of the pipe joint 11, and the pipe joint 11 is a high-pressure pipe joint;

[0027] The cutter head 3 includes a guide block 31, a knife clamping block 32 slidably matched therewith, and a blade 33. The knife clamping block 32 is connected to the bottom of the plunger piston 22 and is connected to the blade 33. When the plunger piston 22 reciprocates, the blade 33 cuts the object in a sawing manner.

[0028] The exhaust assembly 4 includes an exhaust sleeve 41 , an exhaust port 42 is formed between the exhaust sleeve 41 and the shell 100 , and a muffler 43 is provided at the exhaust port 42 . The gap on the inner wall of the buffer sleeve 51 forms an exhaust channel 513 for gas circulation, and the exhaust channel 513 is connected to the exhaust port 42 .

[0029] When the present invention works, Figure 2 As shown, compressed air with a pressure greater than 0.6 MPa enters the air inlet nozzle 12 and the main port 211 through the pipe joint 11, and then flows into the cover plate 24 and the upper air inlet 231 through the first air inlet passage 511 through the direction control of the high-speed air inlet valve 21, pushing the plunger piston 22 to move downward;

[0030] like Figure 6 As shown, when the plunger piston 22 moves downward to the opening position, the compressed air will overflow from the opening and can no longer work downward. At the same time, the high-speed air intake valve 21 moves downward under the condition of vacuum suction, blocking the high-pressure gas from entering the cover plate 24, and the downward push is completed;

[0031] like Figure 5As shown, the high-speed intake valve 21 is in the downward state, the second intake channel 512 is connected with the first intake channel 511, and the high-pressure gas comes out from the top of the high-speed intake valve 21 through the first intake channel 511 through the side port 212, and then enters the lower intake port 232 through the second intake channel 512, thereby pushing the plunger piston 22 to move upward. At the same time, under the condition of air compression, the high-speed intake valve 21 is pushed upward to block the high-pressure gas from entering the side port 212 from the top. After this action is completed, the high-pressure gas can only flow into the cover plate 24 from the bottom of the high-speed intake valve 21, and repeat the reciprocating motion of pushing the plunger piston 21 downward;

[0032] The blade 33 is mounted on the punch piston 22. When the punch piston 22 is reciprocating, the blade 33 cuts the object in a sawing manner. Due to the provision of a shock absorbing assembly, the buffer sleeve 51 is assembled with the air intake assembly 2 as an independent whole, and is suspended and mounted with the housing 100 through a guide ring 53. The upper and lower parts are supported by a spring 52 to eliminate the vibration caused by the movement of the punch piston 22. In this way, the blade body has almost no vibration during ultra-high frequency vibration.

[0033] like Figure 6 As shown, during the reciprocating motion of the ram piston 22 , the gas that has completed the work flows upward through the exhaust channel 513 , passes through the exhaust sleeve 41 , and flows into the muffler 53 of the exhaust port 52 for discharge.

[0034] The present invention drives the moving component to reciprocate at high speed through high-pressure gas, thereby driving the tool to perform efficient vibration cutting. By providing a weight-reducing groove on the piston, the weight of the piston is reduced while the rigidity is kept unchanged, which helps to improve the movement speed and responsiveness of the piston. By providing a protrusion or groove that matches the weight-reducing groove on the cylinder body, the gas storage space is effectively reduced, and the space for compressed gas is reduced during the stroke movement of the piston. A smaller air flow volume produces a greater thrust, shortens the time for pushing the piston, reduces gas consumption, and greatly improves the vibration frequency, which can reach 17,000 times, meeting the needs of high-efficiency production. The vibration caused by the movement of the moving component is effectively reduced by the shock-absorbing component, so that the tool has almost no vibration, thereby improving the cutting quality and the tool life. The pneumatic knife has a relatively simple structure, low maintenance cost, and high reliability. It is also equipped with a muffler to effectively reduce noise during operation and provide a better working environment.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-frequency pneumatic knife, characterized in that: It comprises a shell, in which an air intake assembly for introducing high-pressure gas is installed, a moving assembly driven by the high-pressure gas to perform reciprocating motion, a cutter head arranged at the front end of the moving assembly and moving up and down with the moving assembly, and an exhaust assembly for guiding the gas to be discharged. The moving assembly comprises a high-speed air intake valve, a cylinder body, a plunger piston installed in the inner cavity of the cylinder body, and an air control body. A cover plate is arranged between the high-speed air intake valve and the plunger piston, the air control body is arranged under the cover plate, an air intake conversion port is formed between the high-speed air intake valve and the shell, an air intake port is formed between the air control body and the shell, the plunger piston is provided with a weight reduction groove, and the upper and lower ends of the cylinder body are protrusions or grooves that fit the weight reduction groove.

2. The high-frequency pneumatic knife according to claim 1, characterized in that: The weight-reducing groove is an arc-shaped structure.

3. The high frequency pneumatic knife according to claim 1, characterized in that: The air intake conversion port includes a main port and a side port, and the air intake port includes an upper air intake port and a lower air intake port. The gap between the inner wall of the buffer sleeve and the outer wall of the high-speed intake valve forms a first air intake channel for gas circulation, and the inner wall of the buffer sleeve and the outside of the air control body form a second air intake channel for gas circulation. The first air intake channel is connected to the main port and the upper air intake port, and the second air intake channel is connected to the side port and the lower air intake port. The second air intake channel is connected to or disconnected from the first air intake channel through the reciprocating movement of the high-speed intake valve.

4. The high frequency pneumatic knife according to claim 1, characterized in that: The air intake assembly comprises a pipe joint and an air intake nozzle, and the air intake nozzle is arranged at the bottom of the pipe joint.

5. The high frequency pneumatic knife according to claim 1, characterized in that: The cutter head comprises a guide block, a cutter clamping block slidably matched with the guide block, and a cutter blade. The cutter clamping block is connected to the bottom of the motion component and is connected to the cutter blade.

6. The high frequency pneumatic knife according to claim 1, characterized in that: The exhaust assembly comprises an exhaust sleeve, an exhaust port is formed between the exhaust sleeve and the shell, and a muffler is provided at the exhaust port.

7. The high frequency pneumatic knife according to claim 7, characterized in that: The gap on the inner side wall of the buffer sleeve forms an exhaust channel for gas circulation, and the exhaust channel is connected to the exhaust port.

8. The high frequency pneumatic knife according to claim 1, characterized in that: The shell body is provided with a mounting sleeve, and the pneumatic knife is fixed on the knife seat through the mounting sleeve.

9. The high frequency pneumatic knife according to claim 1, characterized in that: A shock absorbing assembly is arranged between the moving assembly and the shell, and the shock absorbing assembly includes a buffer sleeve, a spring and a guide ring. The guide ring is clamped in the shell, and the buffer sleeve is assembled as a whole with the moving assembly and suspended with the shell through the guide ring. The spring is installed between the buffer sleeve and the shell.

10. The high frequency pneumatic knife according to claim 9, characterized in that: The guide ring is arranged between the air intake component and the motion component.

Images