Novel pneumatic vibration cutter

Abstract

The utility model discloses a novel pneumatic type vibration cutter which comprises a vibration cutter outer barrel, a vibration cutter inner barrel, an outer barrel air inlet end cover, an inner barrel air inlet end cover, a communicating pipe, an air inlet seat, a flow dividing seat, a valve seat, a piston valve element, an air cylinder shell, a piston rod, a cutter, a cutter clamp, a fixed cutter holder and the like. The piston rod can be driven by high-pressure gas to move up and down, so that the cutter is driven to cut, motor driving is not needed, use is convenient, vibration frequency is high, cutting precision is improved, and noise is low. In addition, the vibration cutter is provided with a three-stage noise reduction structure, and noise of the vibration cutter can be further reduced. Preferably, the tool holder can be in clamping connection with the piston rod in a rotary clamping mode, the tool holder can be prevented from being separated from the piston rod in the axial direction, and the risk of tool disengaging is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting machine knives, and more specifically to a novel pneumatic vibrating knife. Background Art

[0002] The cutting machine can cut various materials such as cloth, paper, and plates, which can greatly improve the processing accuracy and production efficiency of the materials. It is widely used in automotive interiors, advertising, clothing, home furnishings, composite materials and other fields, providing the best choice for automated production in many industries.

[0003] The heads of common cutting machines currently on the market are generally equipped with a vibrating knife. Among them, the existing vibrating knife is generally configured to be a vibrating knife driven up and down by a motor, which has the disadvantages of low vibration frequency, low cutting accuracy, and high noise. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and to provide a new pneumatic vibrating knife with reasonable structural design, no need for motor drive, easy use, high vibration frequency, improved cutting accuracy and low noise.

[0005] To achieve the above-mentioned purpose, the utility model provides a novel pneumatic vibrating knife, including a vibrating knife outer cylinder, a vibrating knife inner cylinder, an outer cylinder air inlet end cover, an inner cylinder air inlet end cover, a connecting pipe, an air inlet seat, a diverter seat, a valve seat, a piston valve core, a cylinder shell, a piston rod, a cutter, a knife clamp and a fixed knife seat, the vibrating knife inner cylinder is installed inside the vibrating knife outer cylinder, the outer cylinder air inlet end cover is installed on the top of the vibrating knife outer cylinder, the middle part of the outer cylinder air inlet end cover is penetrated by a first end cover air inlet channel from top to bottom, the inner cylinder air inlet end cover is installed on the top of the vibrating knife inner cylinder, the middle part of the inner cylinder air inlet end cover is penetrated by a second end cover air inlet channel from top to bottom The air passage is connected between the air inlet end cover of the outer cylinder and the air inlet end cover of the inner cylinder and is connected to the air inlet passage of the first end cover and the air inlet passage of the second end cover. The air inlet seat, the diverter seat, the valve seat and the cylinder shell are sequentially assembled and connected from top to bottom and are all installed inside the inner cylinder of the vibrating knife. An air inlet seat air passage is arranged inside the air inlet seat, and the inlet of the air inlet seat air passage is connected to the outlet of the air inlet passage of the second end cover. A diverter seat air cavity is arranged in the middle of the diverter seat, and an air return hole connected to the diverter seat air cavity is arranged on the outer wall of the diverter seat. A first diverter seat connected to the outlet of the air inlet seat air passage is arranged on one side of the diverter seat. The shunt seat air passage, the bottom of the shunt seat is provided with a valve core installation cavity connected with the shunt seat air cavity and the outlet of the first shunt seat air passage, the other side of the shunt seat is provided with a second shunt seat air passage, the inlet of the second shunt seat air passage is connected with the shunt seat air cavity, the outlet of the second shunt seat air passage is connected with the inlet of the cylinder shell air passage located on one side of the cylinder shell, the outlet of the cylinder shell air passage is connected with the cylinder shell air cavity inside the cylinder shell, the outer wall of the cylinder shell is provided with a cylinder shell air outlet, the cylinder shell air outlet is connected with the cylinder shell air cavity and the return air hole of the shunt seat, the upper end part of the piston valve core is movably mounted The valve core is installed in the valve core installation cavity of the diverter seat, and the lower end of the piston valve core is inserted in the middle air vent of the valve seat. The middle air vent of the valve seat is connected to the cylinder shell air cavity. The upper piston part of the piston rod is movably installed in the cylinder shell air cavity. The lower end rod body of the piston rod successively passes downward through the cylinder shell through hole at the bottom of the cylinder shell and the inner tube through hole at the bottom of the vibrating knife inner tube to extend to the inner bottom end of the vibrating knife outer tube. The fixed knife seat is installed at the inner bottom end of the vibrating knife outer tube. The cutting knife is fixedly connected to the lower end rod body of the piston rod through a knife clamp, and the knife clamp is installed in the limiting groove of the fixed knife seat.

[0006] Preferably, the outer cylinder air inlet end cover is provided with a plurality of first end cover air holes evenly distributed around the first end cover air inlet channel, and the interior of the outer cylinder air inlet end cover is provided with a first noise reduction ring below the first end cover air holes, and the first noise reduction ring is located on the periphery of the first end cover air inlet channel.

[0007] Preferably, the inner cylinder air inlet end cover is provided with a plurality of second end cover air holes evenly distributed around the second end cover air inlet passage, and the interior of the inner cylinder air inlet end cover is provided with a second noise reduction ring below the second end cover air holes, and the second noise reduction ring is located on the periphery of the second end cover air inlet passage.

[0008] Preferably, a noise reduction inner cover is provided at the upper end of the vibration knife outer cylinder, the outer wall of the noise reduction inner cover is provided with an inner cover air hole connected to the interior thereof, a noise reduction outer cover is provided on the outside of the noise reduction inner cover, a third noise reduction ring is provided between the inner wall of the noise reduction outer cover and the outer wall of the noise reduction inner cover, and the entrance of the air inlet passage of the first end cover of the outer cylinder air inlet end cover extends upward from the central through holes of the noise reduction inner cover and the noise reduction outer cover in sequence.

[0009] Preferably, an air intake joint is provided at the inlet of the air intake passage of the first end cover of the outer cylinder air intake end cover.

[0010] Preferably, a spring located outside the connecting pipe is provided between the outer cylinder air intake end cover and the inner cylinder air intake end cover.

[0011] Preferably, a fixing ring is provided on the outer wall of the vibration knife outer cylinder, and L-shaped mounting blocks are respectively provided on the opposite sides of the fixing ring. The L-shaped mounting blocks are located in a guide groove opened on the outer wall of the vibration knife outer cylinder, and the guide groove is arranged longitudinally from top to bottom.

[0012] Preferably, a first rod body sealing ring is provided between the lower end rod body of the piston rod and the cylinder shell through hole at the bottom of the cylinder shell, and a second rod body sealing ring is provided between the lower end rod body of the piston rod and the inner cylinder through hole at the bottom of the vibration knife inner cylinder.

[0013] Preferably, a D-shaped retaining ring is provided on the outer wall of the rod body at the lower end of the piston rod, and a clamping block is provided on one side of the rod body entrance at the upper end of the tool clamp, so that the rod body entrance of the tool clamp forms a D-shaped bayonet, and the D-shaped retaining ring can be inserted into the interior of the tool clamp after being aligned with the D-shaped bayonet. When the tool clamp rotates, the D-shaped retaining ring can be misaligned with the clamping block, so that the lower end of the piston rod and the tool clamp can be rotationally connected.

[0014] Preferably, a presser foot cover is provided at the outer bottom end of the oscillating knife outer cylinder, and the lower end of the cutter passes through the center hole of the presser foot cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model has a reasonable structural design and is provided with an outer cylinder of a vibrating knife, an inner cylinder of a vibrating knife, an outer cylinder air inlet end cover, an inner cylinder air inlet end cover, a connecting pipe, an air inlet seat, a diverter seat, a valve seat, a piston valve core, a cylinder shell, a piston rod, a cutter, a knife clamp and a fixed knife seat. It can drive the piston rod up and down by high-pressure gas, thereby driving the cutter to cut, does not require a motor drive, is easy to use, has a high vibration frequency, improves the cutting accuracy, and has low noise.

[0017] 2. The utility model is provided with a three-level noise reduction structure, which can further reduce the noise of the vibrating knife.

[0018] 3. The tool holder of the utility model is connected with the piston rod by a rotating clamping method, which can prevent the tool holder from detaching from the piston rod in the axial direction and avoid the risk of the tool falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a novel pneumatic vibrating knife provided by an embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of a novel pneumatic vibrating knife provided by an embodiment of the utility model;

[0022] Figure 3 It is a partial enlarged view (section) of the middle structure of the new pneumatic vibrating knife provided in the embodiment of the utility model;

[0023] Figure 4 It is a partial enlarged view (section) of the upper end structure of the new pneumatic vibrating knife provided in the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the internal structure of a new type of pneumatic vibrating knife provided by an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the cutting blade installation part of the new pneumatic vibrating blade provided by the embodiment of the utility model;

[0026] Figure 7 It is an exploded view of the cutter installation part of the new pneumatic vibrating knife provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Please refer to Figure 1 and Figure 2 The embodiment of the utility model provides a new type of pneumatic vibrating knife, including a vibrating knife outer cylinder 1, a vibrating knife inner cylinder 2, an outer cylinder air inlet end cover 3, an inner cylinder air inlet end cover 4, a connecting pipe 5, an air inlet seat 6, a diverter seat 7, a valve seat 8, a piston valve core 9, a cylinder shell 10, a piston rod 11, a cutter 12, a knife clamp 13 and a fixed knife seat 14 and other components. The following is a detailed description of the various components of this embodiment in conjunction with the accompanying drawings.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, the vibration knife inner cylinder 2 can be movably installed inside the vibration knife outer cylinder 1, and the outer cylinder air inlet end cover 3 can be installed on the top of the vibration knife outer cylinder 1 through a threaded connection. The middle part of the outer cylinder air inlet end cover 3 is penetrated by a first end cover air inlet passage 31 from top to bottom, and the entrance of the first end cover air inlet passage 31 can be provided with an air inlet joint 20 connected to a high-pressure gas source. The inner cylinder air inlet end cover 4 can be installed on the top of the vibration knife inner cylinder 2 through a threaded connection, and the middle part of the inner cylinder air inlet end cover 4 is penetrated by a second end cover air inlet passage 41 from top to bottom. The connecting pipe 5 is connected between the outer cylinder air inlet end cover 3 and the inner cylinder air inlet end cover 4 and connects the first end cover air inlet passage 31 and the second end cover air inlet passage 41.

[0030] Preferably, a spring 21 located outside the connecting pipe 5 may be further provided between the outer cylinder air intake end cover 3 and the inner cylinder air intake end cover 4 .

[0031] like Figure 2 , Figure 3 and Figure 5As shown, the air inlet seat 6, the diverter seat 7, the valve seat 8 and the cylinder shell 10 are sequentially combined and connected from top to bottom and are all installed inside the vibration knife inner tube 2. The air inlet seat 6 is provided with an air inlet seat air channel 61 inclined outward inside, and the middle entrance of the air inlet seat air channel 61 is connected with the outlet of the second end cover air inlet channel 41 of the inner tube air inlet end cover 4. The middle of the diverter seat 7 is provided with a diverter seat air cavity 71, and the outer wall of the diverter seat 7 is provided with an air return hole 72 connected with the diverter seat air cavity 71. One side of the diverter seat 7 is provided with a first diverter seat air channel 73 connected with the outlet of the air inlet seat air channel 61. The bottom of the diverter seat 7 is provided with a valve core installation cavity 74 connected with the outlet of the diverter seat air cavity 71 and the first diverter seat air channel 73. The other side of the diverter seat 7 is provided with a second diverter seat air channel 75 The inlet of the second diverter seat air channel 75 is connected to the diverter seat air cavity 71, and the outlet of the second diverter seat air channel 75 is connected to the inlet of the cylinder shell air channel 101 located on one side of the cylinder shell 10. The outlet of the cylinder shell air channel 101 is connected to the cylinder shell air cavity 102 inside the cylinder shell 10. The outer wall of the cylinder shell 10 is provided with a cylinder shell air outlet 103, and the cylinder shell air outlet 103 is connected to the cylinder shell air cavity 102 and the return air hole 72 of the diverter seat 7. The upper end of the piston valve core 9 is movably installed in the valve core installation cavity 74 of the diverter seat 7, and the lower end of the piston valve core 9 is inserted in the middle air hole 81 of the valve seat 8. The piston valve core 9 can open or close the middle air hole 81 of the valve seat 8, and the middle air hole 81 of the valve seat 8 is connected to the cylinder shell air cavity 102.

[0032] like Figure 2 , Figure 3 and Figure 5 As shown, the upper piston portion 111 of the piston rod 11 is movably installed in the cylinder shell air cavity 102, and the lower rod body 112 of the piston rod 11 sequentially passes downward through the cylinder shell through hole at the bottom of the cylinder shell 10 and the inner cylinder through hole at the bottom of the vibrating knife inner cylinder 2 to extend to the inner bottom end of the vibrating knife outer cylinder 1.

[0033] In order to improve the sealing performance, Figure 2 As shown, a first rod body sealing ring 23 may be provided between the lower end rod body 112 of the piston rod 11 and the cylinder shell through hole at the bottom of the cylinder shell 10, and a second rod body sealing ring 24 may be provided between the lower end rod body 112 of the piston rod 11 and the inner cylinder through hole at the bottom of the vibrating knife inner cylinder 2.

[0034] As a further improvement of this embodiment, Figure 4 As shown, the outer cylinder air inlet end cover 3 may be provided with a plurality of first end cover air holes 32 evenly distributed around the first end cover air inlet passage 31, and the interior of the outer cylinder air inlet end cover 3 is provided with a first noise reduction ring 15 below the first end cover air holes 32, and the first noise reduction ring 15 is located on the periphery of the first end cover air inlet passage 31.

[0035] Similarly, if Figure 4As shown, the inner tube air inlet end cover 4 may also be provided with a plurality of second end cover air holes 42 evenly distributed around the second end cover air inlet passage 41, and the interior of the inner tube air inlet end cover 4 is provided with a second noise reduction ring 16 below the second end cover air holes 42, and the second noise reduction ring 16 is located on the periphery of the second end cover air inlet passage 41.

[0036] Better, such as Figure 4 As shown, a noise reduction inner cover 17 may be provided at the upper end of the vibration knife outer cylinder 1, and the outer wall of the noise reduction inner cover 17 may be provided with an inner cover air hole 171 connected to the interior thereof, and a noise reduction outer cover 18 may be provided outside the noise reduction inner cover 17, and a third noise reduction ring 19 may also be provided between the inner wall of the noise reduction outer cover 18 and the outer wall of the noise reduction inner cover 17, and the entrance of the first end cover air inlet passage 31 of the outer cylinder air inlet end cover 3 extends upward from the central through holes of the noise reduction inner cover 17 and the noise reduction outer cover 18 in turn.

[0037] During specific manufacturing, the first noise reduction ring 15, the second noise reduction ring 16 and the third noise reduction ring 19 can preferably be made of wool noise reduction rings.

[0038] In this embodiment, the first noise reduction ring 15, the second noise reduction ring 16, the third noise reduction ring 19, the noise reduction inner cover 17 and the noise reduction outer cover 18 are added to effectively reduce the noise of the vibrating knife.

[0039] like Figure 2 , Figure 5 and Figure 6 As shown, the fixed knife seat 14 can be installed at the inner bottom end of the oscillating knife outer cylinder 1 through the knife seat screw, and the cutter 12 can be fixedly connected to the lower rod body 112 of the piston rod 11 through the knife clamp 13 and the knife locking screw 26, and the knife clamp 13 is installed in the limiting groove 141 of the fixed knife seat 14. The fixed knife seat 14 can position the rotation angle of the knife clamp 13 and the cutter 12 to prevent the knife clamp 13 and the cutter 12 from unnecessary deflection.

[0040] As a further improvement of this embodiment, Figure 7 As shown, a D-shaped clamping ring 113 is provided on the outer wall of the rod body 112 at the lower end of the piston rod 11, and a clamping block 131 is provided on one side of the rod body entrance at the upper end of the tool holder 13, so that the rod body entrance of the tool holder 13 forms a D-shaped bayonet 132.

[0041] When installing the knife, the D-shaped retaining ring 113 of the lower end rod body 112 of the piston rod 11 needs to be aligned with the D-shaped retaining ring 132, and then the end of the lower end rod body 112 of the piston rod 11 and the D-shaped retaining ring 113 are inserted into the interior of the knife clamp 13, and then the knife clamp 13 needs to be rotated a certain angle (such as 90 degrees). At this time, the D-shaped retaining ring 113 can be misaligned with the clamping block 131, and the D-shaped retaining ring 113 and the clamping block 131 are engaged in the position, so that the lower end rod body 112 of the piston rod 11 and the knife clamp 13 are rotationally connected, and then the cutter 12 is inserted into the knife groove of the knife clamp 13 and the lower end rod body 112 of the piston rod 11, and finally the cutter 12 is locked by the knife locking screw 26.

[0042] In this embodiment, the tool holder 13 is connected to the lower rod body 112 of the piston rod 11 by means of rotational clamping, which can prevent the tool holder 13 from axially separating from the piston rod 14 and avoid the risk of the tool falling off.

[0043] In addition, if Figure 1 and Figure 2 As shown, a presser foot cover 25 is provided at the outer bottom end of the oscillating knife outer cylinder 1, and the lower end of the cutter 12 passes through the central hole of the presser foot cover 25, and the presser foot cover 25 can press the object to be cut.

[0044] In order to facilitate the installation of the vibration knife, Figure 1 As shown, the outer wall of the vibration knife outer cylinder 1 can also be provided with a fixing ring 22, and the fixing ring 22 can be locked with the outer wall of the vibration knife outer cylinder 1 by fixing ring screws, and L-shaped mounting blocks 221 are respectively provided on opposite sides of the fixing ring 22, and the L-shaped mounting blocks 221 are located in the guide groove 100 provided on the outer wall of the vibration knife outer cylinder 1, and the guide groove 100 is arranged longitudinally from top to bottom. Loosen the fixing ring screws to adjust the upper and lower positions of the fixing ring 22 and the L-shaped mounting block 221.

[0045] The working principle of the utility model is as follows:

[0046] When the high-pressure gas enters the vibrating knife from the air inlet connector 20, the high-pressure gas flows through the first end cover air inlet channel 31 of the outer tube air inlet end cover 3, the connecting pipe 5 and the second end cover air inlet channel 41 of the inner tube air inlet end cover 4 in sequence, and then enters the air inlet seat air channel 61 of the air inlet seat 6. After that, the high-pressure gas enters the valve core installation cavity 74 through the first diverter seat air channel 73, thereby pushing the piston valve core 9 to move upward and opening the middle air vent 81 of the valve seat 8. In this way, the high-pressure gas enters the cylinder shell air cavity 102 of the cylinder shell 10, thereby pushing the piston rod 11 to move downward. At this time, the cutter 12 also moves downward with the piston rod 11 Move, and subsequently, the high-pressure gas in the cylinder shell air cavity 102 of the cylinder shell 10 flows out to the interior of the vibrating knife inner tube 2 through the cylinder shell outlet hole 103, and then flows back to the diverter seat air cavity 71 of the diverter seat 7 through the return hole 72 of the cylinder shell 10, and then the high-pressure gas flows from the diverter seat air cavity 71 through the second diverter seat air channel 75 and the cylinder shell air channel 101 in sequence into the cylinder shell air cavity 102 of the cylinder shell 10 and flows into the lower part of the upper piston part 111 of the piston rod 11, thereby pushing the piston rod 11 upward, so that the cutter 12 moves upward, and this cycle is repeated, and the cutter is driven up and down by the high-pressure gas to cut.

[0047] To sum up, the utility model has a reasonable structural design, and can drive the piston rod to move up and down by high-pressure gas, thereby driving the cutter to cut, without the need for motor drive, is easy to use, has a high vibration frequency, improves cutting accuracy, and has low noise.

[0048] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A new type of pneumatic vibrating knife, characterized by: The present invention comprises an outer cylinder of a vibration knife, an inner cylinder of a vibration knife, an outer cylinder air inlet end cover, an inner cylinder air inlet end cover, a connecting pipe, an air inlet seat, a diverter seat, a valve seat, a piston valve core, a cylinder shell, a piston rod, a cutter, a knife clamp and a fixed knife seat. The inner cylinder of the vibration knife is installed inside the outer cylinder of the vibration knife, the outer cylinder air inlet end cover is installed on the top of the outer cylinder of the vibration knife, the middle part of the outer cylinder air inlet end cover is penetrated by a first end cover air inlet channel from top to bottom, the inner cylinder air inlet end cover is installed on the top of the inner cylinder of the vibration knife, the middle part of the inner cylinder air inlet end cover is penetrated by a second end cover air inlet channel from top to bottom, the connecting pipe is connected between the outer cylinder air inlet end cover and the inner cylinder The air inlet end covers of the cylinder are connected to the first end cover air inlet channel and the second end cover air inlet channel. The air inlet seat, the diverter seat, the valve seat and the cylinder shell are sequentially assembled and connected from top to bottom and are all installed inside the inner cylinder of the vibrating knife. The air inlet seat is provided with an air inlet seat airway inside the air inlet seat, and the inlet of the air inlet seat airway is connected to the outlet of the air inlet channel of the second end cover. The middle part of the diverter seat is provided with a diverter seat air cavity, and the outer wall of the diverter seat is provided with an air return hole connected to the diverter seat air cavity. One side of the diverter seat is provided with a first diverter seat airway connected to the outlet of the air inlet seat airway, and the bottom of the diverter seat A valve core installation cavity is provided which is connected with the diverter seat air cavity and the outlet of the first diverter seat air passage, a second diverter seat air passage is provided on the other side of the diverter seat, the inlet of the second diverter seat air passage is connected with the diverter seat air cavity, the outlet of the second diverter seat air passage is connected with the inlet of the cylinder shell air passage located on one side of the cylinder shell, the outlet of the cylinder shell air passage is connected with the cylinder shell air cavity inside the cylinder shell, a cylinder shell air outlet hole is provided on the outer wall of the cylinder shell, the cylinder shell air outlet hole is connected with the cylinder shell air cavity and the return air hole of the diverter seat, and the upper end of the piston valve core is movably installed on the diverter seat The valve core is installed in the cavity, and the lower end of the piston valve core is inserted in the middle air vent of the valve seat. The middle air vent of the valve seat is connected to the air cavity of the cylinder shell. The upper piston part of the piston rod is movably installed in the air cavity of the cylinder shell. The lower end rod body of the piston rod successively passes downward through the cylinder shell through hole at the bottom of the cylinder shell and the inner tube through hole at the bottom of the vibrating knife inner tube to extend to the inner bottom end of the vibrating knife outer tube. The fixed knife seat is installed at the inner bottom end of the vibrating knife outer tube. The cutting knife is fixedly connected to the lower end rod body of the piston rod through a knife clamp, and the knife clamp is installed in the limiting groove of the fixed knife seat.

2. A novel pneumatic vibrating knife according to claim 1, characterized in that: The outer cylinder air inlet end cover is provided with a plurality of first end cover air holes evenly distributed around the first end cover air inlet passage, and the interior of the outer cylinder air inlet end cover is provided with a first noise reduction ring below the first end cover air holes, and the first noise reduction ring is located at the periphery of the first end cover air inlet passage.

3. The novel pneumatic vibrating knife according to claim 1 is characterized in that: The inner cylinder air inlet end cover is provided with a plurality of second end cover air holes evenly distributed around the second end cover air inlet passage, the inner cylinder air inlet end cover is provided with a second noise reduction ring below the second end cover air holes, and the second noise reduction ring is located at the periphery of the second end cover air inlet passage.

4. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A noise reduction inner cover is provided at the upper end of the vibration knife outer cylinder, the outer wall of the noise reduction inner cover is provided with an inner cover air hole connected to the interior thereof, a noise reduction outer cover is provided outside the noise reduction inner cover, a third noise reduction ring is provided between the inner wall of the noise reduction outer cover and the outer wall of the noise reduction inner cover, and the entrance of the air inlet passage of the first end cover of the outer cylinder air inlet end cover extends upward through the central through holes of the noise reduction inner cover and the noise reduction outer cover in turn.

5. The novel pneumatic vibrating knife according to claim 1 is characterized in that: An air intake joint is provided at the inlet of the first end cover air intake passage of the outer cylinder air intake end cover.

6. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A spring located outside the connecting pipe is provided between the outer cylinder air intake end cover and the inner cylinder air intake end cover.

7. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A fixing ring is provided on the outer wall of the vibration knife outer cylinder, and L-shaped mounting blocks are respectively provided on opposite sides of the fixing ring. The L-shaped mounting blocks are located in a guide groove opened on the outer wall of the vibration knife outer cylinder, and the guide groove is arranged longitudinally from top to bottom.

8. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A first rod body sealing ring is provided between the lower rod body of the piston rod and the cylinder shell through hole at the bottom of the cylinder shell, and a second rod body sealing ring is provided between the lower rod body of the piston rod and the inner cylinder through hole at the bottom of the vibration knife inner cylinder.

9. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A D-shaped retaining ring is provided on the outer wall of the rod body at the lower end of the piston rod, and a clamping block is provided on one side of the rod body entrance at the upper end of the tool clamp, so that the rod body entrance of the tool clamp forms a D-shaped bayonet. The D-shaped retaining ring can be inserted into the interior of the tool clamp after being aligned with the D-shaped bayonet. When the tool clamp rotates, the D-shaped retaining ring can be misaligned with the clamping block, so that the rod body at the lower end of the piston rod and the tool clamp can be rotatably connected.

10. The novel pneumatic vibrating knife according to claim 1 is characterized in that: A presser foot cover is arranged at the outer bottom end of the outer cylinder of the oscillating knife, and the lower end of the cutting knife passes through the central hole of the presser foot cover.

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