High-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials

Abstract

The utility model relates to a high-frequency self-cooling pneumatic cutter structure for cutting semi-rigid materials, which comprises an outer cylinder, and a cavity part A and a cavity part B are sequentially arranged in the outer cylinder from top to bottom; a piston A for dividing an inner cavity of the cavity piece A into an upper inner cavity A and a lower inner cavity A is arranged in the cavity piece A; a piston B dividing an inner cavity of the cavity piece B into an upper inner cavity B and a lower inner cavity B is placed in the cavity piece B. A cutting knife is installed on the piston B. The lower end of the cutting knife stretches out of the lower end of the outer cylinder after stretching out of the lower end of the cavity piece B. The cavity piece A is provided with an air inlet channel, the lower inner cavity A and the upper inner cavity B are communicated through a center channel, and the upper inner cavity A and the lower inner cavity B are communicated through an air entraining channel. The utility model has the beneficial effects that the structure is simple, the pneumatic action is realized, the service life is long, the cooling can be realized, and the long-time use can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible material processing equipment, in particular to a high-frequency self-cooling pneumatic cutting knife structure suitable for cutting semi-rigid materials. Background Art

[0002] When cutting flexible materials, such as shoe fabrics and soles, a special cutter head structure is required to perform two actions: one is the reciprocating action in the up and down directions (to achieve cutting), and the other is the turning action of the cutter head (to achieve arc cutting or change the direction of the cutter head).

[0003] Currently, motors are mostly used on the market to achieve reciprocating motion in the up and down directions. However, the inner and outer rings of the thrust bearing of the motor may undergo slight changes when subjected to force, affecting processing and shortening the service life of the entire equipment.

[0004] Based on his previous design, the inventor continued to improve and designed a pneumatic reciprocating cutter head structure, which not only extends the service life compared to the motor, but also significantly improves the service life of the cutter head compared to the general pneumatic structure used in the cutter head (experiments have shown that general pneumatic structures in other fields are used in cutter heads for cutting semi-rigid materials, and their service life is very short, basically they are damaged after 2 to 3 months. This design structure has largely overcome this defect). Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a high-frequency self-cooling pneumatic cutting knife structure which can automatically cool, has buffering function and has a long service life and is used for cutting semi-rigid materials.

[0006] The purpose of the utility model is achieved by the following technical solutions: A high-frequency self-cooling pneumatic cutting knife structure for semi-rigid materials comprises an outer cylinder, in which a cavity part A and a cavity part B are arranged in sequence from top to bottom;

[0007] The cavity part A is provided with a piston A which divides its inner cavity into an upper inner cavity A and a lower inner cavity A; the cavity part B is provided with a piston B which divides its inner cavity into an upper inner cavity B and a lower inner cavity B, and a cutting knife is mounted on the piston B, and the lower end of the cutting knife extends out from the lower end of the cavity part B and then extends out from the lower end of the outer tube;

[0008] The cavity member A is provided with an air intake passage, the lower inner cavity A and the upper inner cavity B are connected via a central passage, and the upper inner cavity A and the lower inner cavity B are connected via an air inlet passage; if the piston A is in the lower position, the air intake passage, the upper inner cavity A, the air inlet passage, and the lower inner cavity B are connected; if the piston A is in the upper position, the air intake passage, the lower inner cavity A, the central passage, and the upper inner cavity B are connected;

[0009] When the high-pressure gas enters the upper inner chamber A through the air intake channel, the high-pressure gas enters the lower inner chamber B through the air duct channel and moves the piston B from bottom to top, thereby driving the cutting knife to move upward; when the piston B moves from bottom to top, the gas in the upper inner chamber B will be squeezed into the lower inner chamber A through the center channel and act on the piston A, causing the piston A to move upward. When the piston A moves from bottom to top, the air intake channel, the lower inner chamber A, the center channel and the upper inner chamber B will be connected, and the high-pressure gas will flow to the upper inner chamber B and act on the piston B, causing the piston B to move from top to bottom, thereby realizing the downward movement of the cutting knife.

[0010] As a preferred technical solution of the present application, a sleeve block is fixed inside the lower end of the outer cylinder, and a flat hole is opened on the sleeve block; the blade at the lower end of the cutting knife passes through the flat hole, and when the cutting knife moves up and down, the blade reciprocates up and down in the flat hole; when the outer cylinder rotates, the cutting knife can be driven to rotate through the interaction between the sleeve block and the blade.

[0011] As a preferred technical solution of the present application, an intermediate piece is provided in the outer cylinder between cavity piece A and cavity piece B; the intermediate piece is provided with a central channel which runs through it from top to bottom; the air bleed channel comprises a front section channel, a middle section channel and a rear section channel which are connected in sequence; the front section channel is provided on cavity piece A, the inlet of the front section channel is located on the inner side wall of the upper inner cavity A, and the outlet of the front section channel is located on the lower end of cavity piece A; the middle section channel is provided on the intermediate piece, the inlet and outlet of the middle section channel are respectively located on the upper end face and the lower end face of the intermediate piece; the rear section channel is provided on cavity piece B, the inlet of the rear section channel is located on the upper end face of cavity piece B, and the outlet of the rear section channel is located on the inner side wall of the lower inner cavity B of cavity piece B.

[0012] As a preferred technical solution of the present application, the gap formed by the piston B and the corresponding inner cavity gradually decreases in size from bottom to top; when the piston B falls back to the lower limit position, the outlet of the channel is aligned with the outer cylindrical surface of the piston B; when the high-pressure gas in the air inlet channel of the piston B flows out, it acts on the side of the piston B, thereby driving the piston B to move from bottom to top.

[0013] As a preferred technical solution of the present application, the lower end of the inner cavity of the cavity part A has an annular cavity, and the lower part of the piston A has an annular portion; when the piston A is installed in the cavity part A, the upper part of the piston A is adaptively inserted into the upper part of the inner cavity of the cavity part A, and the annular portion can be moved up and down in the annular cavity; when the annular portion moves from bottom to top, the annular bottom surface of the annular portion and the bottom wall of the annular cavity form a lower channel gap, and the air intake channel is connected to the upper inner cavity B via the lower channel gap, the lower inner cavity A, and the center channel; when the annular portion moves from top to bottom, the annular top surface of the annular portion and the top wall of the annular cavity form an upper channel gap, and the air intake channel is connected to the lower inner cavity B via the upper channel gap, the upper inner cavity A, and the air inlet channel.

[0014] Furthermore, the air hole A is connected with the upper end of the outer tube via the guide groove A, and the air hole B is connected with the upper end of the outer tube via the guide groove B, the guide groove C, and the guide groove A to form an upper atmospheric channel; that is, the upper inner cavity A can also be connected with the outside world via the air hole A and the upper atmospheric channel, and the upper inner cavity B is connected with the outside world via the air hole B and the upper atmospheric channel.

[0015] As a preferred technical solution of the present application, the inner wall of the upper inner cavity A is provided with an air hole A, and the inner wall of the upper inner cavity B is provided with an air hole B; the outer cylindrical surface of the cavity member A is provided with a guide groove A, the middle member is provided with a guide groove C, the outer cylindrical surface of the cavity member B is provided with a guide groove B, and the sleeve is provided with a guide hole D. The guide groove A, the guide groove C, the guide groove B, the cavity member B and the cylinder section between the sleeve and the outer cylinder, and the guide hole D are sequentially connected to form a lower atmospheric passage;

[0016] The lower atmospheric channel is connected to the outside atmosphere via the guide hole D, which is inclined and the outlet of the guide hole D faces the lower end of the cutting knife; the upper inner cavity A is connected to the lower atmospheric channel via the air hole A, and the upper inner cavity B is connected to the lower atmospheric channel via the air hole B.

[0017] The cavity parts A and B can be slidably installed in the outer tube; a buffer component A is provided between the upper end surface of the cavity part A and the upper end of the outer tube; a buffer component B is provided between the lower end surface of the cavity part B and the lower end of the outer tube, and a cutting knife installed on the piston B in the cavity part B first extends out from the lower end of the cavity part B, then passes through the buffer component A, and then extends out from the lower end of the outer tube.

[0018] As a preferred technical solution of the present application, a rotary joint is installed at the upper end of the outer cylinder; an air nozzle head is installed at the upper end of the cavity member A, the lower end of the air nozzle head is connected to the air inlet channel, and the upper end of the air nozzle head passes through the buffer component A and is inserted into the rotary joint and the two are connected.

[0019] For ease of understanding, the principles and core design points of this solution are explained:

[0020] The pneumatic structure is adopted to realize the up and down reciprocating motion of the cutter head; and the pneumatic structure can increase the service life of the cutter head structure, and can also realize the cooling inside the cutter head structure, so that the cutter head can be used for a long time; it can also realize the cooling of the blade, so that the blade can be used for a longer time;

[0021] The pneumatic type realizes the principle as follows: under the action of gravity, piston A and piston B fall, and high-pressure gas acts on piston B through the air intake channel, the upper channel gap, the upper inner chamber A, and the air inlet channel, causing piston B to move upward, and piston B drives the cutting knife to move upward; when piston B moves upward, it squeezes the gas in the upper inner chamber B into the lower inner chamber A, causing piston A to move upward, opening the lower channel gap, so that the air intake channel, the lower inner chamber A, the central channel, and the upper inner chamber B are connected, causing piston B to move downward;

[0022] In addition, the high-pressure gas in the bleed passage acts on the side of piston B;

[0023] The advantages of the above-mentioned pneumatic design are: 1. Only one air inlet is required to realize the reciprocating motion of the cutting knife (no need for two air inlets for both positive and negative directions), the structure is simple and easy to process and realize; 2. The high-pressure gas acts on the side of the piston B, and the impact generated by the piston B during its upward movement is small, which in turn makes the impact of the air in the upper inner cavity B on the piston A small, reducing the impact intensity and increasing the service life of the entire cutter head structure (in addition, the service life is further increased by the buffer structure A and the buffer structure B); 3. When the high-pressure gas flows in the cutter head structure, it will take away the heat generated by the friction of the piston and the cutting knife in the cutter head, thereby realizing cooling; and when the pistons A and B are in motion, they also promote the interaction between the upper inner cavity A and the lower inner cavity B with the outside air, which can also achieve cooling.

[0024] The utility model has the following advantages: simple structure, which enables pneumatic action to be realized, long service life, and can realize automatic cooling, which enables long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the interior of the utility model from another angle;

[0028] Figure 4 It is a schematic diagram of the structure of cavity part A, middle part and cavity part B;

[0029] Figure 5 It is a schematic diagram of the structure between the cavity part A, the middle part, and the cavity part B from another angle;

[0030] Figure 6 It is a schematic diagram of the structure between the sleeve block and the cutting knife;

[0031] Figure 7 Schematic diagram of the structure opened for the lower atmospheric passage;

[0032] Figure 8 Schematic diagram of the structure opened for the upper atmospheric passage;

[0033] In the figure: 10-outer cylinder, 11-end cover, 1101-upper through hole A, 12-set block;

[0034] 20- cavity part A, 21- piston A, 21-1- annular part, 22- air inlet channel, 23- air bleed channel, 24- annular cavity, 25- air hole A, 26- air nozzle head, 27- spring A, 28- air hole B;

[0035] 30-middle piece, 31-center channel;

[0036] 40-chamber member B, 41-piston B, 42-spring B;

[0037] 50-cutting knife, 60-adapter, 6001-guide gap, 62-buckle cover, 6201-upper channel hole B, 70-rotating joint, 80-pressing cylinder, 81-spring C, 90-lower atmospheric channel, 91-air guide groove A, 92-air guide groove C, 93-air guide groove D, 94-guide hole D. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0039] It should be noted that the directions or positional relationships indicated by "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0041] (Example 1)

[0042] See also Figure 1 to Figure 6 The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials proposed in this embodiment includes an outer cylinder 10, in which a cavity piece B40, an intermediate piece 30, and a cavity piece A20 are sequentially installed from bottom to top, and the cavity piece B40, the intermediate piece 30, and the cavity piece A20 are connected as a whole;

[0043] Wherein, the outer cylinder 10 is fixedly mounted on the tool holder;

[0044] A rotary joint 70 is installed at the top of the outer cylinder 10, and the rotary joint is connected to the high-pressure gas source; an air inlet channel 22 is opened on the cavity part A20, and the air inlet channel 22 is connected to the rotary joint 70 through the air nozzle head 26; the lower cavity of the inner cavity of the cavity part A20 has an annular cavity 24, and the outlet of the air inlet channel 22 is located on the side inner wall of the annular cavity 24;

[0045] Among them, a piston A21 is placed in the inner cavity of the cavity part A20, and the piston A21 divides the inner cavity of the cavity part A20 into an upper inner cavity A and a lower inner cavity A (the cavity located above the piston A21 is the upper inner cavity A, and the cavity located below the piston A21 is the lower inner cavity A); in addition, the lower part of the piston A21 has an annular portion 21-1, the annular portion 21-1 is located in the annular cavity 24, and the annular portion 21-1 can move up and down in the annular cavity 24; when the piston A21 moves upward, the annular bottom surface of the annular portion 21-1 and the bottom wall of the annular cavity 24 form a lower channel gap; when the annular portion 21-1 moves from top to bottom, the annular top surface of the annular portion 21-1 and the top wall of the annular cavity 24 form an upper channel gap;

[0046] The lower end of the cavity member B40 has a long tube portion, and a piston B41 is placed in the inner cavity of the cavity member B40. The piston B41 divides the inner cavity into an upper inner cavity B and a lower inner cavity B (the cavity above the piston B41 is the upper inner cavity B, and the cavity below the piston B41 is the lower inner cavity B); in addition, a cutting knife 50 is fixed on the piston B41, and the cutting knife includes a handle rod and a blade at the lower end of the handle rod. The handle rod is located in the long tube portion with a gap between the two, and the blade extends from the lower end of the long tube portion (and also extends from the lower end of the long tube 10);

[0047] The middle piece 30 is provided with a central passage 31 which passes through the middle piece 30 from top to bottom, and the central passage 31 connects the lower inner cavity A and the upper inner cavity B.

[0048] Among them, the upper inner cavity A and the lower inner cavity B are connected through the air bleed channel 23; specifically, the air bleed channel 23 includes a front section channel, a middle section channel, and a rear section channel that are connected in sequence, the front section channel is opened on the cavity part A20, the inlet of the front section channel is located on the inner side wall of the upper inner cavity A, and the outlet of the front section channel is located on the lower end of the cavity part A20; the middle section channel is opened on the middle part 30, and the inlet and outlet of the middle section channel are respectively located at the upper end surface and the lower end surface of the middle part 30; the rear section channel is opened on the cavity part B40, the inlet of the rear section channel is located on the upper end surface of the cavity part B40, and the outlet of the rear section channel is located at the inner side wall of the lower inner cavity B of the cavity part B40;

[0049] To achieve the up and down cutting action of the cutting knife 50, the steps are as follows:

[0050] S1, the action mechanism drives the entire device through the tool holder to approach the semi-rigid material to be cut, and the high-pressure gas source enters the air inlet channel 22 through the rotary joint 70 and the gas nozzle head 26;

[0051] S2. At the beginning of air intake, under the action of gravity, the lower surface of the annular portion 21-1 of the piston A21 contacts the lower groove wall of the annular cavity 24, and the piston B41 is located at the lower inner cavity B; the high-pressure gas flows through the air intake channel 22, the upper channel gap, the upper inner cavity A, and the air bleed channel 23 in sequence, and then acts on the piston B41, causing the piston B41 to move upward, so that the piston B41 drives the cutting knife 50 to move upward;

[0052] S3. When the piston B41 moves upward, the gas in the upper inner chamber B is squeezed into the lower inner chamber A through the central channel 31 and acts on the piston A21, so that the piston 21 moves upward; when the piston A21 moves upward, the gap of the upper channel is closed and the gap of the lower channel is opened; in this way, the high-pressure gas at the air inlet channel 22 flows into the lower inner chamber A through the gap of the lower channel, and then flows into the upper inner chamber B through the central channel 31, and finally acts on the piston B41, so that the piston B41 moves from top to bottom, and the piston B41 drives the cutting knife 50 to move downward; in this way, the cutting knife 50 can reciprocate up and down in sequence;

[0053] S4. Then when the piston B41 moves downward, the air pressure in the upper inner chamber B decreases, so the piston A21 falls back under the action of gravity, so that the upper channel gap opens and the lower channel gap closes, and then the above actions are repeated to realize the up and down reciprocating action of the cutting knife 50.

[0054] In this embodiment, a sleeve block 12 is fixed inside the lower end of the outer cylinder 10, and a flat hole is opened on the sleeve block 12; the blade at the lower end of the cutting knife 50 passes through the flat hole, and when the cutting knife 50 moves up and down, the blade reciprocates up and down in the flat hole; when the outer cylinder 10 rotates under the action of the action structure, the sleeve block 12 and the blade can interact with each other to drive the cutting knife 50 to rotate, and can cut into a corner shape on the semi-rigid material.

[0055] In this embodiment, there is a gap between the piston B41 and the corresponding inner cavity. When the piston B41 falls to the lower position, the outlet of the air inlet channel 23 is located at the wall of the gap; when the high-pressure gas in the air inlet channel 23 of the piston B41 flows out, it acts on the side of the piston B41, thereby driving the piston B41 to move from bottom to top. Compared with the method of directly acting on the lower end surface of the piston B41, this method of acting on the piston B41 can reduce the upward collision force of the piston B41, reduce the intake and exhaust channels, and thus increase the service life of the entire cutting knife device.

[0056] Furthermore, the gap formed by the piston B41 and the corresponding inner cavity can be designed in such a way that the size of the gap gradually decreases from bottom to top.

[0057] In this embodiment, at the lower cavity opening of the inner cavity of the cavity part A20, a cavity opening with a larger inner diameter is opened on the inner wall there. When the middle part 30 is connected to the cavity part A20 (fixed together by screws), the middle part 30 blocks the cavity opening with a larger inner diameter, thereby forming an annular cavity 24.

[0058] In this embodiment, when the middle piece 30 is connected to the cavity piece B40, the upper cavity opening of the inner cavity of the cavity piece B40 is blocked.

[0059] (Example 2)

[0060] On the basis of Example 1, in order to allow the entire mechanism to be well cooled and thus increase its service life, a corresponding design was carried out.

[0061] Specifically, see Figure 7 , an air hole A25 is opened on the inner wall of the upper inner cavity A, and an air hole B28 is opened on the inner wall of the upper inner cavity B; and the upper inner cavity A is connected to the lower atmospheric passage 90 through the air hole A25, and the upper inner cavity B is connected to the lower atmospheric passage 90 through the air hole B28;

[0062] A guide groove A91 is formed on the outer cylindrical surface of the cavity member A20, a guide groove C92 is formed on the middle member 30, a guide groove B93 is formed on the outer cylindrical surface of the cavity member B40, and a guide hole D94 is formed on the sleeve block 12. The guide groove A91, the guide groove C92, the guide groove B93, the cylinder section between the cavity member B40 and the sleeve block 12 and the outer cylinder 10, and the guide hole D94 are sequentially connected to form a lower atmospheric passage 90, and the lower atmospheric passage 90 is connected to the outside atmosphere through the guide hole D94.

[0063] Furthermore, the guide hole D94 is inclined and the outlet of the guide hole D94 faces the lower end of the cutting knife 50;

[0064] The cooling principle is: when the high-pressure gas source is connected through the air inlet channel 22, the upper channel gap, the upper inner cavity A, the air inlet channel 23, and the lower inner cavity B (i.e., when the piston B41 is ready to move upward), a part of the high-pressure gas source is discharged to the atmosphere through the air hole A25 and the lower atmosphere channel 90 (which can cool the upper inner cavity A), and the discharged high-pressure gas source is just aimed at the blade, which can cool the blade;

[0065] When the piston B41 moves upward, the piston A24 can also discharge the air in the upper inner cavity A through the air hole A25 and the lower atmospheric channel 90, and the discharged gas is directed toward the blade to cool the blade; when the piston B41 moves upward, the piston B41 can discharge a part of the gas in the upper inner cavity B through the air hole B28 and the lower atmospheric channel 90, and the discharged gas is directed toward the blade to cool the blade;

[0066] When the high-pressure gas source is connected through the air inlet channel 22, the lower channel gap, the lower inner cavity A, the central channel 22, and the upper inner cavity B (i.e., when the piston B41 is ready to move downward), a part of the high-pressure gas source is discharged through the channel B28 and the lower atmospheric channel 90, and the discharged gas is directed to the blade to cool the blade;

[0067] When the piston B41 moves upward, the outside air can be sucked into the lower inner chamber B through the gap between the cutting blade 50 and the long tube portion (the lower part of the cavity member B40); when the piston B41 moves downward, the gas in the lower inner chamber B can be discharged to the outside air through the gap between the cutting blade 50 and the long tube portion, and the blade can also be cooled to a certain extent;

[0068] Therefore, through the above design, the corresponding inner cavity and blade can be cooled, thereby avoiding excessive heating of the entire device and increasing the service life.

[0069] In this embodiment, Figure 8 As shown, a rotary joint 70 is installed on the end cover 11 via the adapter 60, and an upper through hole A1101 is opened on the end cover 11, and the lower end of the rotary joint 70 is inserted into the adapter 60 and the two form a guide gap 6001, and the adapter 60 is covered by a buckle cover 62 (the rotary joint passes through the buckle cover 62), and a plurality of upper through holes B3201 are opened on the buckle cover 62;

[0070] In this way, the air hole A25 is connected to the outside atmosphere via the guide groove A91, the upper through hole A1101, the guide gap 6001, and the upper through hole B6201, and the air hole B28 is connected to the outside atmosphere via the guide groove B93, the guide groove C92, the guide groove A91, the upper through hole A1101, the guide gap 6001, and the upper through hole B6201, forming an upper atmosphere channel;

[0071] That is, the upper inner cavity A can also communicate with the outside world through the air hole A25 and the upper atmospheric channel, and the upper inner cavity B can communicate with the outside world through the air hole B28 and the upper atmospheric channel.

[0072] (Example 3)

[0073] On the basis of Example 1 or Example 2, corresponding designs are also made to reduce vibration.

[0074] Specifically, see Figure 2 and Figure 3The cavity part A20, the middle part 30 and the cavity part B40 can slide up and down in the outer cylinder 10, and sealing rings are respectively mounted on the cavity parts A20 and B40; wherein, the outer cylinder 10 has a large inner diameter cylinder at the top and a small inner diameter cylinder at the bottom, and the large inner diameter cylinder and the small inner diameter cylinder form a step at the connection point, and a spring B42 is placed between the step and the cavity part B40 to form a buffer structure B; an end cover 11 is arranged on the outer cylinder 10, and a spring A27 is placed between the end cover 11 and the cavity part A20 to form a buffer structure A; this buffer design allows the cutter head structure to have a certain degree of flexible buffering, and can also further improve the service life of the cutter head structure compared to the method in which the cutter head directly contacts and cuts with the semi-rigid material.

[0075] In this embodiment, the spring A27 is sleeved on the nozzle head 26, and the spring B42 is sleeved on the long tube portion.

[0076] In this embodiment, a rotary joint 70 is installed on the end cover 11 via an adapter 60, the nozzle head 26 is installed at the upper end of the cavity part A20, the lower end of the nozzle head 26 is connected to the air inlet channel 22, and the upper end of the nozzle head 26 is inserted into the rotary joint 70 and the two are connected.

[0077] (Example 4)

[0078] On the basis of Example 1, Example 2 or Example 3, refer to Figure 1 to Figure 3 The lower end of the outer cylinder 10 is sleeved with a pressing cylinder 80, which is connected to the outer cylinder 10 via a spring C81; a cutting edge is provided on the pressing cylinder 80, and the blade leaks out from the cutting edge. When working, the pressing cylinder 80 automatically presses the material, and then under the action of high-pressure gas, the cutting knife 50 reciprocates up and down.

[0079] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials, characterized by: It comprises an outer cylinder (10), wherein a cavity part A (20) and a cavity part B (40) are sequentially arranged in the outer cylinder (10) from top to bottom; The cavity member A (20) has a piston A (21) disposed therein for dividing its inner cavity into an upper inner cavity A and a lower inner cavity A; the cavity member B (40) has a piston B (41) disposed therein for dividing its inner cavity into an upper inner cavity B and a lower inner cavity B, and a cutting knife (50) is mounted on the piston B (41), the lower end of the cutting knife (50) extending out from the lower end of the cavity member B (40) and then extending out from the lower end of the outer tube (10); The cavity member A (20) is provided with an air intake passage (22); the lower inner cavity A and the upper inner cavity B are connected via a central passage (31); the upper inner cavity A and the lower inner cavity B are connected via an air inlet passage (23); if the piston A (21) is in a lower position, the air intake passage (22), the upper inner cavity A, the air inlet passage (23), and the lower inner cavity B are connected; if the piston A (21) is in an upper position, the air intake passage (22), the lower inner cavity A, the central passage (31), and the upper inner cavity B are connected.

2. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 is characterized in that: A sleeve block (12) is fixed inside the lower end of the outer cylinder (10), and a flat hole is opened on the sleeve block (12); The blade at the lower end of the cutting knife (50) passes through the flat hole. When the cutting knife (50) moves up and down, the blade reciprocates up and down in the flat hole. When the outer cylinder (10) rotates, the cutting knife (50) can be driven to rotate through the interaction between the sleeve block (12) and the blade.

3. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 or 2, characterized in that: An intermediate piece (30) is provided in the outer cylinder (10) between the cavity piece A (20) and the cavity piece B (40); The middle piece (30) is provided with a central passage (31) running through it from top to bottom; The air bleed channel (23) comprises a front channel, a middle channel and a rear channel which are connected in sequence; the front channel is opened on the cavity member A (20), the inlet of the front channel is located on the inner side wall of the upper inner cavity A, and the outlet of the front channel is located on the lower end of the cavity member A (20); the middle channel is opened on the middle member (30), the inlet and outlet of the middle channel are respectively located on the upper end surface and the lower end surface of the middle member (30); the rear channel is opened on the cavity member B (40), the inlet of the rear channel is located on the upper end surface of the cavity member B (40), and the outlet of the rear channel is located on the inner side wall of the lower inner cavity B of the cavity member B (40).

4. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 or 2, characterized in that: There is a gap between the piston B (41) and the corresponding inner cavity. When the piston B (41) falls back to the lower limit position, the outlet of the air induction channel (23) is aligned with the outer cylindrical surface of the piston B (41).

5. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 4, characterized in that: The gap formed by the piston B (41) and the corresponding inner cavity gradually decreases in size from bottom to top.

6. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 or 2, characterized in that: The lower end of the inner cavity of the cavity member A (20) has an annular cavity (24), and the lower part of the piston A (21) has an annular portion (21-1); The piston A (21) is installed in the cavity member A (20), the upper part of the piston A (21) is adaptively inserted into the upper part of the inner cavity of the cavity member A (20), and the annular part (21-1) is movable up and down in the annular cavity (24); When the annular portion (21-1) moves from bottom to top, the annular bottom surface of the annular portion (21-1) and the bottom wall of the annular cavity (24) form a lower channel gap, and the air intake channel (22) is connected to the upper cavity B via the lower channel gap, the lower cavity A, and the central channel (31); when the annular portion (21-1) moves from top to bottom, the annular top surface of the annular portion (21-1) and the top wall of the annular cavity (24) form an upper channel gap, and the air intake channel (22) is connected to the lower cavity B via the upper channel gap, the upper cavity A, and the air introduction channel (23).

7. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 2, characterized in that: The inner wall of the upper inner cavity A is provided with an air hole A (25), and the inner wall of the upper inner cavity B is provided with an air hole B (28); The outer cylindrical surface of the cavity member A (20) is provided with a guide groove A (91), the middle member (30) is provided with a guide groove C (92), the outer cylindrical surface of the cavity member B (40) is provided with a guide groove B (93), and the sleeve (12) is provided with a guide hole D (94); the guide groove A (91), the guide groove C (92), the guide groove B (93), the cylinder section between the cavity member B (40) and the sleeve (12) and the outer cylinder (10), and the guide hole D (94) are sequentially connected to form a lower atmospheric passage (90); The lower atmosphere channel (90) is connected to the outside atmosphere via a guide hole D (94), the guide hole D (94) is inclined and the outlet of the guide hole D (94) faces the lower end of the cutting knife (50); The upper inner cavity A is connected to the lower atmospheric passage (90) via the air hole A (25), and the upper inner cavity B is connected to the lower atmospheric passage (90) via the air hole B (28).

8. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 7, characterized in that: The air hole A (25) is connected to the upper end of the outer tube (10) via the guide groove A (91), and the air hole B (28) is connected to the upper end of the outer tube (10) via the guide groove B (93), the guide groove C (92), and the guide groove A (91), thereby forming an upper atmospheric passage; That is, the upper inner cavity A can also communicate with the outside world through the air hole A (25) and the upper atmospheric channel, and the upper inner cavity B can communicate with the outside world through the air hole B (28) and the upper atmospheric channel.

9. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 or 2, characterized in that: The cavity member A (20) and the cavity member B (40) are slidably mounted in the outer cylinder (10); A buffer component A is provided between the upper end surface of the cavity member A (20) and the upper end of the outer cylinder (10); A buffer component B is provided between the lower end surface of the cavity component B (40) and the lower end of the outer tube (10). A cutting knife (50) mounted on a piston B (41) in the cavity component B (40) first extends out from the lower end of the cavity component B (40), then passes through the buffer component A, and then extends out from the lower end of the outer tube (10).

10. The high-frequency self-cooling pneumatic cutting knife structure for cutting semi-rigid materials according to claim 1 or 2, characterized in that: A rotary joint (70) is installed at the upper end of the outer cylinder (10); The upper end of the cavity member A (20) is provided with a nozzle head (26), the lower end of the nozzle head (26) is connected to the air inlet passage (22), and the upper end of the nozzle head (26) passes through the buffer member A and is inserted into the rotary joint (70), and the two are connected.

Images