Mute damping pneumatic knife

Abstract

The utility model discloses a mute damping pneumatic knife which comprises a shell, an air inlet assembly installed in the shell, a moving assembly driven by high-pressure air to reciprocate, a knife head arranged at the front end of the moving assembly and moving up and down along with the moving assembly, an exhaust assembly used for guiding air to be exhausted and a damping assembly. The damping assembly comprises a buffering sleeve, a spring and a guide ring, the guide ring is clamped in the shell, the buffering sleeve and the moving assembly are assembled into a whole and are installed on the shell in a suspended mode through the guide ring, and the spring is installed between the buffering sleeve and the shell. High-pressure gas drives the motion assembly to reciprocate at a high speed to drive the cutter to perform efficient vibration cutting, vibration caused by motion of the motion assembly is effectively reduced through the damping assembly, the cutter is almost free of vibration, the cutting quality is improved, the service life of the cutter is prolonged, and the pneumatic cutter is relatively simple in structure, low in maintenance cost, high in reliability and suitable for popularization and application. And a silencer is also arranged, so that the noise during working is effectively reduced, and a better working environment is provided.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic knife technology, specifically a silent and vibration-damping pneumatic knife. Background Technology

[0002] Vibrating knives are mainly used for cutting flexible materials. Currently, many industries use electric vibrating knives, which have a simple structure but short amplitude (only 1mm stroke) and low cutting force. They are mainly used in the clothing or advertising industries and are suitable for lightweight, thin, flexible materials such as fabrics and paper. However, in the leather cutting industry, several layers of materials are often cut together, requiring a longer amplitude stroke of 8mm or more and greater cutting force. This led to the development of pneumatic knives, which utilize high-pressure gas to provide greater cutting force and are suitable for cutting thicker or multi-layered materials such as leather, rubber, and plastics. However, traditional pneumatic vibrating cutting tools, under high-frequency vibration, generate inertia that causes the entire blade to vibrate, affecting the surface finish of the cut product, thus affecting the cutting quality and shortening the tool's lifespan. Utility Model Content

[0003] The purpose of this invention is to provide a silent and vibration-damping pneumatic knife to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a silent and shock-absorbing pneumatic knife, comprising a housing, wherein an air intake assembly for introducing high-pressure gas, a motion assembly driven by high-pressure gas to reciprocate, a cutter head disposed at the front end of the motion assembly and moving up and down with the motion assembly, an exhaust assembly for guiding gas discharge, and a shock-absorbing assembly are installed inside the housing. The shock-absorbing assembly includes a buffer sleeve, a spring, and a guide ring. The guide ring is snapped into the housing. The buffer sleeve is assembled integrally with the motion assembly and is suspended from the housing through the guide ring. The spring is installed between the buffer sleeve and the housing.

[0005] Furthermore, the air intake assembly includes a pipe connector and an air intake nozzle, the air intake nozzle being disposed at the bottom of the pipe connector.

[0006] Furthermore, the motion component includes a high-speed intake valve, a punch piston, and a pneumatic control body. A cover plate is provided between the high-speed intake valve and the punch piston, and the pneumatic control body is located below the cover plate. An intake conversion port is formed between the high-speed intake valve, the buffer sleeve, and the housing, and an intake port is formed between the pneumatic control body, the buffer sleeve, and the housing.

[0007] Furthermore, the air intake conversion port includes a main port and a side port, and the air intake includes an upper air intake and a lower air intake. The gap between the inner wall of the buffer sleeve and the outer wall of the high-speed air intake valve forms a first air intake channel for gas flow. The inner wall of the buffer sleeve and the outside of the air control body form a second air intake channel for gas flow. The first air intake channel is connected to the main port and the upper air intake. The second air intake channel is connected to the side port and the lower air intake. The second air intake channel is connected to or disconnected from the first air intake channel by the reciprocating movement of the high-speed air intake valve.

[0008] Furthermore, the guide ring is disposed between the intake assembly and the moving assembly.

[0009] Furthermore, the cutter head includes a guide block, a clamping block that slides with it, and a blade. The clamping block is connected to the bottom of the motion component and is connected to the blade.

[0010] Furthermore, the exhaust assembly includes an exhaust sleeve, an exhaust port is formed between the exhaust sleeve and the housing, and a muffler is provided at the exhaust port.

[0011] Furthermore, the gaps in the inner wall of the buffer sleeve form an exhaust channel for gas flow, and the exhaust channel is connected to the exhaust port.

[0012] Furthermore, a mounting sleeve is provided on the housing, and the pneumatic knife is fixed to the knife holder by the mounting sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses high-pressure gas to drive the motion component to reciprocate at high speed, which drives the cutter to perform efficient vibration cutting. The vibration caused by the motion component is effectively reduced by the shock absorption component, so that the cutter has almost no vibration, improving the cutting quality and the cutter life. The pneumatic cutter has a relatively simple structure, low maintenance cost, and high reliability. It is also equipped with a silencer to effectively reduce noise during operation and provide a better working environment.

[0015] 2. Weight reduction grooves are created on the piston to reduce its weight while maintaining its rigidity. This helps improve the piston's movement speed and responsiveness. By setting protrusions or grooves on the cylinder to match the weight reduction grooves, the space for storing gas is effectively reduced. During the piston's stroke, the space for compressed gas is reduced, resulting in a smaller airflow volume that generates greater thrust. This shortens the time required to push the piston, reduces gas consumption, and greatly increases the vibration frequency, which can reach 17,000 times, meeting the needs of high-efficiency production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-frequency pneumatic knife structure of the present invention;

[0017] Figure 2 for Figure 1 Sectional view along the middle AA line;

[0018] Figure 3 This is a schematic diagram of the structure in which the piston interacts with the cylinder block when it moves upward.

[0019] Figure 4 This is a schematic diagram of the structure in which the piston interacts with the cylinder block when it moves downwards.

[0020] Figure 5 This is a schematic diagram of the structure of the high-frequency pneumatic knife of the present invention after the piston moves upward;

[0021] Figure 6 for Figure 5 Sectional view along the middle BB line;

[0022] In the diagram, 100-housing, 101-mounting sleeve, 1-intake assembly, 11-pipe connector, 12-intake nozzle, 2-motion assembly, 21-high-speed intake valve, 211-main port, 212-side port, 22-pump piston, 221-piston head, 222-piston rod, 223-weight reduction groove, 23-gas control body, 231-upper intake port, 232-lower intake port, 24-cover plate, 25-cylinder block, 251-protrusion, 252-groove, 3-blade, 31-guide block, 32-clamping block, 33-blade, 4-exhaust assembly, 41-exhaust sleeve, 42-exhaust port, 43-muffler, 51-buffer sleeve, 511-first intake channel, 512-second intake channel, 513-exhaust channel, 52-spring, 53-guide ring. The arrows indicate the direction of gas intake and exhaust. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-6As shown, this embodiment provides a high-frequency pneumatic knife, including a housing 100. The housing 100 houses an air intake assembly 1 for introducing high-pressure gas, a motion assembly 2 driven by the high-pressure gas to reciprocate, a blade head 3 positioned at the front end of the motion assembly 2 and moving up and down with it, an exhaust assembly 4 for guiding gas discharge, and a shock-absorbing assembly. A mounting sleeve 101 is provided on the housing 100, and the pneumatic knife is fixed to a knife holder via the mounting sleeve 101. The shock-absorbing assembly includes a buffer sleeve 51, a spring 52, and a guide ring 53. The guide ring 53 is snapped into the housing 100. The buffer sleeve 51 is assembled integrally with the motion assembly 2 and is suspended from the housing 100 via the guide ring 53. In this embodiment, the housing 100... The inner wall of the housing 100 has a first annular groove, and the outer wall of the buffer sleeve 51 has a second annular groove. The guide ring 53 is respectively inserted into the first annular groove and the second annular groove. Two springs 52 are provided, one at the upper part and the other at the lower part 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. Thus, the upper and lower ends of the buffer sleeve 51 are supported by one spring 52 each, eliminating vibrations caused by the movement of the moving components. The moving component 2 includes a high-speed intake valve 21, a cylinder 25, a piston rod 22 installed in the cylinder 25, and a pneumatic control body 23. The high-speed intake valve 21 and the piston rod 22... A cover plate 24 is provided between the piston rod 22 and the gas control body 23 is located below the cover plate 24. An intake conversion port is formed between the high-speed intake valve 21, the buffer sleeve 51, and the housing 100. An intake port is formed between the gas control body 23, the buffer sleeve 51, and the housing 100. The intake conversion port includes a main port 211 and a side port 212. The main port 211 is connected to the intake nozzle 12. The intake port includes an upper intake port 231 and a lower intake port 232. A first intake channel 511 for gas flow is formed between the inner wall of the buffer sleeve 51 and the outer wall of the high-speed intake valve 21. A second intake channel 512 for gas flow is formed between the inner wall of the buffer sleeve 51 and the outer side of the gas control body 23. 1. The first intake port 211 and the upper intake port 231 are connected. The second intake channel 512 is connected to the side port 212 and the lower intake port 232. The second intake channel 512 is connected to or disconnected from the first intake channel 511 by the reciprocating movement of the high-speed intake valve 21. The guide ring 53 is disposed between the intake nozzle 12 and the gas conversion port. The piston rod 22 includes a piston head 221 and a piston rod 222. 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-shaped structure, which reduces the weight of the piston while maintaining rigidity, which helps to improve the piston's movement speed and responsiveness. The upper and lower ends of the cylinder body 25 are respectively protrusions 251 or grooves 252 that fit with the weight reduction groove 223. Figure 3 As shown, when the piston rod 22 moves to the upper end of the cylinder 25, the weight reduction groove 223 fits against the protrusion 251, and there is no gap or a very small gap between the piston rod 22 and the upper end of the cylinder 25. Figure 4 As shown, when the punch piston 22 moves to the lower end of the cylinder 25, the weight reduction groove 223 fits into the groove 252, and there is no gap or a very small gap between the punch piston 22 and the lower end of the cylinder 25, which effectively reduces the space for storing gas. During the stroke of the punch piston 22, the space for compressed gas is reduced, and less airflow volume generates greater thrust, shortens the time for pushing the piston, reduces air consumption, and greatly increases the vibration frequency. The vibration frequency can reach 17,000 times, while the existing pneumatic knife has a vibration frequency of no more than 13,000 times under a gas pressure of 0.7 MPa.

[0025] The air intake assembly 1 includes a pipe connector 11 and an air intake nozzle 12. The air intake nozzle 12 is disposed at the bottom of the pipe connector 11, and the pipe connector 11 is a high-pressure pipe connector.

[0026] The cutter head 3 includes a guide block 31, a clamping block 32 that slides with it, and a blade 33. The clamping block 32 is connected to the bottom of the punch piston 22 and connected to the blade 33. During the reciprocating motion of the punch piston 22, the blade 33 performs a sawing cut on the object being cut.

[0027] The exhaust assembly 4 includes an exhaust sleeve 41, an exhaust port 42 is formed between the exhaust sleeve 41 and the housing 100, the exhaust port 42 is provided with a muffler 43, and the gap in the inner wall of the buffer sleeve 51 forms an exhaust channel 513 for gas flow, the exhaust channel 513 is connected to the exhaust port 42.

[0028] When this utility model is working, such as Figure 2 As shown, compressed air with a pressure greater than 0.6 MPa enters the air inlet 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 channel 511 under the direction control of the high-speed air inlet valve 21, pushing the piston rod 22 to move downward.

[0029] like Figure 6 As shown, when the piston rod 22 moves downward to the opening position and is exposed, the compressed air will overflow from the opening and will no longer be able to do work downward. At the same time, the high-speed intake valve 21 moves downward under the vacuum suction condition, blocking the high-pressure gas from entering the cover plate 24, and the downward pushing operation is completed.

[0030] like Figure 5As shown, when the high-speed intake valve 21 is in the downward state, the second intake channel 512 is connected to the first intake channel 511. High-pressure gas exits from the top of the high-speed intake valve 21 through the side port 212 via the first intake channel 511, and then enters the lower intake port 232 through the second intake channel 512, thereby pushing the piston rod 22 to move upward. At the same time, under the condition of air compression, the high-speed intake valve 21 is pushed upward, blocking 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 repeats the reciprocating motion of pushing the piston rod 21 downward.

[0031] The blade 33 is mounted on the punch piston 22. During the reciprocating motion of the punch piston 22, the blade 33 performs a sawing cut on the object being cut. Due to the shock absorption component, the buffer sleeve 51 is assembled with the air intake component 2 as an independent unit. It is suspended and mounted on the housing 100 through the guide ring 53 and supported by a spring 52 at the top and bottom, eliminating the vibration caused by the movement of the punch piston 22. Thus, the blade body has almost no vibration during ultra-high frequency vibration.

[0032] like Figure 6 As shown, during the reciprocating motion of the piston rod 22, the gas that has done work flows upward through the exhaust passage 513, through the exhaust sleeve 41, and into the muffler 53 of the exhaust port 52 for discharge.

[0033] This invention utilizes high-pressure gas to drive a high-speed reciprocating motion component, which in turn drives a cutting tool for efficient vibration cutting. A damping component effectively reduces vibration caused by the motion of the component, resulting in virtually no tool vibration, thus improving cutting quality and tool life. This pneumatic knife has a relatively simple structure, low maintenance costs, and high reliability. It is also equipped with a silencer to effectively reduce noise during operation and provide a better working environment. Weight-reducing grooves are created on the piston, reducing its weight while maintaining rigidity, which helps improve piston speed and responsiveness. By setting protrusions or grooves on the cylinder to match the weight-reducing grooves, the gas storage space is effectively reduced. This reduces the space required for compressed gas during the piston's stroke, resulting in greater thrust from a smaller airflow volume, shortening the time required to push the piston, reducing gas consumption, and significantly increasing the vibration frequency to 17,000 times per second, meeting the demands of high-efficiency production.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A silent, vibration-damping pneumatic knife, characterized in that: The device includes a housing, within which are installed an intake assembly for introducing high-pressure gas, a motion assembly driven by the high-pressure gas to reciprocate, a cutter head located at the front end of the motion assembly and moving up and down with the motion assembly, an exhaust assembly for guiding gas out, and a shock-absorbing assembly. The shock-absorbing assembly includes a buffer sleeve, a spring, and a guide ring. The guide ring is fitted inside the housing. The buffer sleeve is assembled integrally with the motion assembly and is suspended from the housing via the guide ring. The spring is installed between the buffer sleeve and the housing. The motion assembly includes a high-speed intake valve, a cylinder, a piston rod installed in the inner cavity of the cylinder, and a gas control body. A cover plate is provided between the high-speed intake valve and the piston rod. The gas control body is located below the cover plate. An intake conversion port is formed between the high-speed intake valve, the buffer sleeve, and the housing. An intake port is formed between the gas control body, the buffer sleeve, and the housing.

2. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: The air intake assembly includes a pipe connector and an air intake nozzle, with the air intake nozzle located at the bottom of the pipe connector.

3. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: The piston rod is provided with a weight reduction groove, and the upper and lower ends of the cylinder are protrusions or grooves that fit into the weight reduction groove.

4. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: 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 air intake valve forms a first air intake channel for gas flow. The inner wall of the buffer sleeve and the outside of the air control body form a second air intake channel for gas flow. 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. The second air intake channel is connected to or disconnected from the first air intake channel by the reciprocating movement of the high-speed air intake valve.

5. The silent and vibration-damping pneumatic knife according to any one of claims 1 to 4, characterized in that: The guide ring is positioned between the intake assembly and the moving assembly.

6. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: The cutter head includes a guide block, a clamping block that slides with it, and a blade. The clamping block is connected to the bottom of the motion component and is connected to the blade.

7. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: The exhaust assembly includes an exhaust sleeve, an exhaust port is formed between the exhaust sleeve and the housing, and a muffler is provided at the exhaust port.

8. The silent and vibration-damping pneumatic knife according to claim 6, characterized in that: The gaps in the inner wall of the buffer sleeve form an exhaust channel for gas flow, and the exhaust channel is connected to the exhaust port.

9. The silent and vibration-damping pneumatic knife according to claim 1, characterized in that: The housing is provided with a mounting sleeve, and the pneumatic knife is fixed to the knife holder by the mounting sleeve.

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