Pneumatic buffer stop

Abstract

The present invention relates to the technical field of stoppers, and discloses a pneumatic buffer stopper, including a stopper, a buffer seat, a base and a driving member, wherein the stopper is used to stop a pallet; the buffer seat has a main buffer cavity, and the front end of the stopper extends and is embedded in the main buffer cavity; the driving member includes a pressure spring, a piston body and a driving shaft, and the pressure spring is used to make the buffer seat in an ejected state; the base has a bottom cavity and an air inlet cavity, the piston body is placed in the bottom cavity, the base has an air inlet, the air inlet is located above the piston body, the air inlet cavity and the air inlet are connected and arranged, and the air inlet cavity is used to inject gas into the bottom cavity and push the piston body to move in the direction toward the pressure spring; the base has a lower buffer cavity, and the buffer seat has an upper buffer cavity, and the outer ends of the upper buffer cavity and the lower buffer cavity are arranged correspondingly. When it is necessary to stop, the stopper is pushed by the pallet, the stopper moves, and the gas filled in the main buffer cavity plays a role of increasing resistance, so that the stopper has a flexible barrier, avoids the rebound of the pallet, and stops the pallet at a specified position.

Description

Technical Field

[0001] The invention relates to the technical field of stoppers, and more specifically, to pneumatic buffer stoppers. Background Art

[0002] The stopper is mainly used in pallet conveyors. When the pallet conveyor is conveying pallets, the stopper is used to stop one or more pallets at a specified position.

[0003] Currently, in order to realize the stopping and releasing functions of the pallet, the stopping and releasing functions of the pallet are realized by swinging or moving the baffle.

[0004] In the prior art, when the conveyor is performing a conveying operation, the pallet is transported in a specified direction. Once the pallet is subjected to a blocking force, the reaction force will cause the pallet to rebound, resulting in a loud noise in the conveying operation and a loud noise in the working environment. At the same time, the baffle directly blocks the pallet, which can easily cause the pallet to shake significantly, affecting the transportation safety of the objects supported on the pallet.

[0005] Furthermore, the baffle directly blocks the tray, which may easily cause damage to the baffle and the tray, and affect the service life of the baffle and the tray. In the prior art, the stopper lacks a flexible method for stopping the tray. Summary of the invention

[0006] The purpose of the present invention is to provide a pneumatic buffer stopper, aiming to solve the problem of the lack of flexible stopper in the prior art.

[0007] The present invention is implemented as follows: a pneumatic buffer stopper comprises a stopper, a buffer seat, a base and a driving member, wherein the buffer seat and the base are arranged correspondingly in the vertical direction, and the stopper is embedded in the buffer seat in the horizontal direction, and the stopper is used to stop the tray; the buffer seat has a main buffer cavity, and the front end of the stopper extends and is embedded in the main buffer cavity;

[0008] The driving member includes a pressure spring, a piston body and a driving shaft, the lower part of the pressure spring is fixedly arranged, the upper part of the pressure spring and the piston body are pressed against each other, the lower part of the driving shaft is connected to the piston body, the upper part of the driving shaft is connected to the buffer seat, and the pressure spring is used to make the buffer seat be in an ejected state;

[0009] The base has a bottom cavity and an air inlet cavity, the bottom cavity and the air inlet cavity are connected, the piston body is placed in the bottom cavity, the base has an air inlet, the air inlet is arranged above the piston body, the air inlet cavity and the air inlet are connected, the air inlet cavity is used to inject gas into the bottom cavity and push the piston body to move in the direction toward the pressure spring;

[0010] The base has a lower buffer cavity, and the buffer seat has an upper buffer cavity. The upper buffer cavity is connected to the main buffer cavity, and the inner end of the lower buffer cavity is connected to the bottom cavity. From top to bottom, the outer ends of the upper buffer cavity and the lower buffer cavity are correspondingly arranged; when the buffer seat and the base are in a conflicting arrangement, the upper buffer cavity and the lower buffer cavity are connected and connected in an up-and-down manner, and the inner end of the lower buffer cavity is connected to the air inlet cavity through the bottom cavity.

[0011] Furthermore, the upper buffer cavity includes a longitudinal cavity and a transverse cavity group, the longitudinal cavity is extended along the longitudinal direction, the transverse cavity group is extended along the transverse direction, and the inner end of the transverse cavity group is connected to the main buffer cavity, the outer end of the transverse cavity group is connected to the upper part of the longitudinal cavity, and the lower part of the longitudinal cavity is correspondingly arranged up and down with the lower buffer cavity.

[0012] Furthermore, the transverse cavity group includes a first long cavity, a wide cavity and a second long cavity, the first long cavity and the second long cavity are respectively extended along the length direction, the two ends of the wide cavity are respectively connected with the first long cavity and the second long cavity, the first long cavity is connected with the main buffer cavity, and the second long cavity is connected with the upper part of the longitudinal cavity.

[0013] Furthermore, the outer end of the first long cavity is connected to the wide cavity, the inner end of the first long cavity forms a first cavity opening, and the first cavity opening is staggered with the stop member.

[0014] Furthermore, a longitudinal cavity head is formed at the lower portion of the longitudinal cavity, and a diameter of the longitudinal cavity head is larger than a diameter of an outer end of the lower buffer cavity.

[0015] Furthermore, the stopping member includes a stopping head, a stopping shaft and a stopping plate, the stopping head is installed on the buffer seat, the inner end of the stopping shaft passes through the stopping head, the outer end of the stopping shaft is connected to the lower part of the stopping plate, the upper part of the stopping plate is extended upward, and the stopping plate is used to stop the tray; an axial cavity is formed inside the stopping shaft, the axial cavity extends along the axial direction of the stopping shaft, and the axial cavity is connected to the main buffer cavity.

[0016] Furthermore, the stop head includes an outer baffle plate and an inner embedded head, the outer baffle plate and the inner embedded head are connected and arranged, the inner embedded head is embedded in the buffer seat, and the outer baffle plate is arranged outside the buffer seat; the base includes two extension plates and a rear clamping plate, the two extension plates are arranged in a spaced correspondence, the buffer seat is arranged between the two extension plates, and the outer baffle plate and the rear clamping plate clamp the buffer seat.

[0017] Furthermore, the base has an air release cavity, the inner end of which is connected to the bottom cavity, and the outer end of which is connected to the outside; the base has an air release port, the inner end of which is connected to the air release port; the air release port and the air inlet cavity are blocked by the piston body, and when the piston body moves downward to below the air release port, the air release port and the air inlet cavity are connected.

[0018] Furthermore, the air inlet cavity includes an outer cavity section, a middle cavity section and an inner cavity section. Along the horizontal direction, the inner cavity section, the middle cavity section and the outer cavity section are connected in sequence and arranged in communication. The outer end of the outer cavity section is used for gas injection, and the inner end of the inner cavity section is connected to the bottom cavity. The caliber of the outer cavity section is larger than that of the inner cavity section, and the middle cavity section is arranged in a flared shape along the direction toward the outer cavity section.

[0019] Further, the pneumatic buffer stopper includes at least one fixing member, the fixing member is arranged through the base, the fixing member includes a screwing member and a limit head, the outer end of the screwing member and the limit head are connected, the screwing member is arranged through the base, the inner end of the screwing member forms a screwing head, and the screwing head is arranged to rotate under the rotational force; the pneumatic buffer stopper is installed on the conveying platform, and the conveying platform includes a transverse rail frame, the transverse rail frame has an inner rail groove and an outer rail groove, the inner rail groove and the outer rail groove are connected and arranged, and the inner rail groove and the outer rail groove are respectively extended along the conveying direction, the limit head includes an outer limit part and an inner limit part, the outer limit part and the inner limit part are connected and arranged in a stepped manner, the outer limit part is embedded in the outer rail groove, and the inner limit part is embedded in the inner rail groove.

[0020] Compared with the prior art, the pneumatic buffer stopper provided by the present invention, when in the release state, external gas is transported to the bottom cavity through the air inlet cavity and the air inlet port, pushing the piston body to move downward, and the piston body causes the pressure spring to be in a compressed state. At the same time, the driving shaft drives the buffer seat downward, causing the stop member to move downward, and the pallet is transported along the conveying platform without being blocked by the stop member, and the gas passes through the lower buffer cavity and the upper buffer cavity in turn and fills the main buffer cavity; when stopping is required, the air inlet cavity withdraws gas from entering, and the pressure spring is reset to drive the piston body upward, causing the buffer seat to move upward, and the pallet is stopped by the stop member. Since the main buffer cavity is filled with gas, when the stop member is pushed by the pallet, the stop member moves toward the buffer seat, and the gas filled in the main buffer cavity plays a role of increasing resistance, so that the stop member has flexible blocking, avoids the rebound of the pallet, and makes the pallet stop flexibly at the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the pneumatic buffer stopper provided by the present invention;

[0022] Figure 2 is a rear view schematic diagram of the pneumatic buffer stopper provided by the present invention;

[0023] Figure 3 It is a cross-sectional schematic diagram of part A of the pneumatic buffer stopper provided by the present invention;

[0024] Figure 4 1 is a schematic cross-sectional view of part B of the pneumatic buffer stopper provided by the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the C portion of the pneumatic buffer stopper provided by the present invention;

[0026] Figure 6 It is a cross-sectional schematic diagram of the D portion of the pneumatic buffer stopper provided by the present invention;

[0027] Figure 7 It is a schematic diagram of the cooperation between the pneumatic buffer stopper and the conveying platform provided by the present invention;

[0028] Figure 8 It is a top view schematic diagram of the pneumatic buffer stopper and the conveying platform provided by the present invention;

[0029] Fig. 9 It is a schematic cross-sectional view of the E portion of the pneumatic buffer stopper provided by the present invention;

[0030] Fig.10 It is an enlarged schematic diagram of the F part of the pneumatic buffer stopper provided by the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] Reference Figure 1-10The figure shows a preferred embodiment of the present invention.

[0035] The pneumatic buffer stopper comprises a stopper 1, a buffer seat 2, a base 3 and a driving member 5. The buffer seat 2 and the base 3 are arranged correspondingly in the upper and lower directions. In the horizontal direction, the stopper 1 is embedded in the buffer seat 2. The stopper 1 is used to stop the tray. The buffer seat 2 has a main buffer cavity 21. The front end of the stopper 1 extends and is embedded in the main buffer cavity 21.

[0036] The driving member 5 includes a pressure spring 51, a piston body 52 and a driving shaft 53. The lower part of the pressure spring 51 is fixedly arranged, the upper part of the pressure spring 51 and the piston body 52 are pressed, the lower part of the driving shaft 53 is connected to the piston body 52, and the upper part of the driving shaft 53 is connected to the buffer seat 2. The pressure spring 51 is used to make the buffer seat 2 in an ejected state;

[0037] The base 3 has a bottom cavity 31 and an air inlet cavity 34, the bottom cavity 31 and the air inlet cavity 34 are connected, the piston body 52 is placed in the bottom cavity 31, the base 3 has an air inlet 33, the air inlet 33 is arranged above the piston body 52, the air inlet cavity 34 and the air inlet 33 are connected, the air inlet cavity 34 is used to inject gas into the bottom cavity 31 and push the piston body 52 to move in the direction toward the pressure spring 51;

[0038] The base 3 has a lower buffer cavity 32, and the buffer seat 2 has an upper buffer cavity. The upper buffer cavity is connected to the main buffer cavity 21, and the inner end of the lower buffer cavity 32 is connected to the bottom cavity 31. From top to bottom, the outer ends of the upper buffer cavity and the lower buffer cavity 32 are correspondingly arranged; when the buffer seat 2 and the base 3 are in a conflicting arrangement, the upper buffer cavity and the lower buffer cavity 32 are connected and arranged in an upper and lower manner, and the inner end of the lower buffer cavity 32 is connected to the air inlet cavity 34 through the bottom cavity 31.

[0039] When the pneumatic buffer stopper is in the release state, external gas is transported to the bottom chamber 31 through the air inlet chamber 34 and the air inlet port 33, pushing the piston body 52 to move downward, and the piston body 52 causes the pressure spring 51 to be in a compressed state. At the same time, the driving shaft 53 drives the buffer seat 2 downward, causing the stop member 1 to move downward, and the pallet is transported along the conveying platform 6 without being blocked by the stop member 1, and the gas passes through the lower buffer chamber 32 and the upper buffer chamber in turn and fills the main buffer chamber 21; when stopping is required, the air inlet chamber 34 withdraws gas from entering, and the pressure spring 51 is reset to drive the piston body 52 upward, causing the buffer seat 2 to move upward, and the pallet is stopped by the stop member 1. Since the main buffer chamber 21 is filled with gas, when the stop member 1 is pushed by the pallet, the stop member 1 moves toward the buffer seat 2, and the gas filled in the main buffer chamber 21 plays a role in increasing resistance, so that the stop member 1 has a flexible barrier to avoid the rebound of the pallet, so that the pallet can stop flexibly at the specified position.

[0040] The upper buffer chamber includes a longitudinal chamber 22 and a transverse chamber group. The longitudinal chamber 22 is extended in the longitudinal direction, and the transverse chamber group is extended in the transverse direction. The inner end of the transverse chamber group is connected to the main buffer chamber 21, and the outer end of the transverse chamber group is connected to the upper part of the longitudinal chamber 22. The lower part of the longitudinal chamber 22 is correspondingly arranged with the lower buffer chamber 32 along the upper and lower sides. With the cooperation of the transverse chamber group and the longitudinal chamber 22, the airflow is easily transferred from the lower buffer chamber 32 to the main buffer chamber 21.

[0041] The transverse cavity group includes a first long cavity 25, a wide cavity 24 and a second long cavity 23. The first long cavity 25 and the second long cavity 23 are respectively extended along the length direction. The two ends of the wide cavity 24 are respectively connected with the first long cavity 25 and the second long cavity 23. The first long cavity 25 is connected with the main buffer cavity 21, and the second long cavity 23 is connected with the upper part of the longitudinal cavity 22.

[0042] In this way, when filling gas, the airflow is transported along the longitudinal cavity 22, the second long cavity 23, the wide cavity 24 and the first long cavity 25 in sequence, increasing the filling area of ​​the airflow; when stopping, the buffering effect is improved, and the movement of the stop member 1 is made more stable.

[0043] At the same time, when the pressure spring 51 resets and drives the piston body 52 upward, the loss of airflow is slowed down to ensure the subsequent buffering effect of stopping.

[0044] The outer end of the first long cavity 25 is connected to the wide cavity 24, and the inner end of the first long cavity 25 forms a first cavity opening, and the first cavity opening and the stop member 1 are staggered; in this way, when the gas is filled, the airflow will not directly act on the stop member 1, thereby improving the filling effect of the airflow; and when the stop member is in effect, the airflow loss effect is reduced to ensure the stop buffering effect.

[0045] A longitudinal cavity head is formed at the lower part of the longitudinal cavity 22, and the diameter of the longitudinal cavity head is larger than the diameter of the outer end of the lower buffer cavity 32; in this way, when in the release state, the buffer seat 2 and the base 3 are arranged in an upper and lower overlapping manner, and the longitudinal cavity head abuts against the base 3, so that the airflow in the lower buffer cavity 32 flows completely to the longitudinal cavity 22, reducing the loss of airflow and facilitating the airflow to enter the longitudinal cavity 22.

[0046] Along the direction away from the lower buffer cavity 32, the caliber of the longitudinal cavity head is gradually reduced, which accelerates the airflow and facilitates the airflow to enter the longitudinal cavity 22 and transfer to the transverse cavity group.

[0047] The second long cavity 23 and the longitudinal cavity 22 are arranged in a cross-staggered manner. The airflow first fills the upper end of the longitudinal cavity 22 and then flows down to the staggered position and transfers to the second long cavity 23. This arrangement helps to reduce airflow transmission noise.

[0048] The second long cavity 23 has an air intake section and a slow air section, and the air intake section and the slow air section are connected and arranged, and the longitudinal cavity 22 is arranged between the air intake section and the slow air section; the caliber of the slow air section is larger than the caliber of the air intake section; the gas in the longitudinal cavity 22 is synchronously filled into the air intake section and the slow air section; in this way, when the stop operation is performed, the airflow is not easy to flow back to the longitudinal cavity 22, thereby ensuring the subsequent buffering effect.

[0049] The caliber of the air inlet section is smaller than that of the longitudinal cavity 22, so that when filling with gas, the airflow is accelerated, and when stopping, the gas discharge is restricted, and the airflow is not easy to flow back to the longitudinal cavity 22, thereby ensuring the subsequent buffering effect.

[0050] The first long cavity 25 has one cavity section, two cavity sections, three cavity sections and four cavity sections, which correspond to each other in sequence and are connected. The one cavity section is connected to the main buffer cavity 21, and the two cavity sections are connected to the wide cavity 24. When the gas is filled, the gas flow passes through the wide cavity 24 to simultaneously fill the one cavity section, the two cavity sections, the three cavity sections and the four cavity sections; the calibers of the two cavity sections and the four cavity sections are both larger than the caliber of the three cavity sections, and the caliber of the two cavity sections is larger than the caliber of the one cavity section.

[0051] In this way, when filling gas, the gas enters the first and third chamber sections from the second chamber section. The diameter of the first chamber section is smaller than that of the second chamber section, which plays an accelerating role. The diameter of the third chamber section is smaller than that of the second chamber section, which plays an accelerating role, making it convenient for the gas to enter the first and third chamber sections respectively along the second chamber section. During the blocking operation, the gas flow in the first chamber section is not easy to flow back to the second chamber section, and the gas flow in the third chamber section is not easy to flow back to the second chamber section, thereby ensuring the subsequent buffering effect.

[0052] In addition, under the action of the four chamber sections, during the stop operation, the airflow backflow has a buffer space, so that the gas backflow of one chamber section has multiple backflow areas, which reduces noise and protects the stop member 1.

[0053] The stopping member 1 includes a stopping head 11, a stopping shaft 12 and a stopping plate 13. The stopping head 11 is installed on the buffer seat 2. The inner end of the stopping shaft 12 passes through the stopping head 11. The outer end of the stopping shaft 12 is connected to the lower part of the stopping plate 13. The upper part of the stopping plate 13 is extended upward. The stopping plate 13 is used to stop the tray. An axial cavity 14 is formed inside the stopping shaft 12. The axial cavity 14 extends along the axial direction of the stopping shaft 12, and the axial cavity 14 is connected to the main buffer cavity 21.

[0054] In this way, when the stop plate 13 is pushed by the tray, the force is transmitted to the stop shaft 12, prompting the stop shaft 12 to move toward the main buffer chamber 21. Under the buffering effect of the main buffer chamber 21, it has a buffering effect on the stop; and, under the action of the shaft chamber 14, the gas filling area is increased to improve the buffering effect on the stop.

[0055] The shaft cavity 14 and the first long cavity 25 are arranged in a staggered manner, so as to avoid direct loss of gas during the stop operation, slow down the loss speed and improve the buffering effect.

[0056] The stop head 11 includes an outer baffle and an inner embedded head, the outer baffle and the inner embedded head are connected and arranged, the inner embedded head is embedded with a buffer seat 2, and the outer baffle is arranged outside the buffer seat 2; the base 3 includes two extension plates and a rear clamping plate, the two extension plates are arranged in a corresponding interval, the buffer seat 2 is arranged between the two extension plates, and the outer baffle and the rear clamping plate clamp the buffer seat 2.

[0057] In this way, under the cooperation of the outer baffle plate, the two extension plates and the rear clamping plate, the buffer seat 2 is limited from deflecting, so that the buffer seat 2 can only move longitudinally, thereby improving the accuracy of the stopping position of the stopping member 1.

[0058] The base 3 has an air release cavity, the inner end of which is connected to the bottom cavity, and the outer end of which is connected to the outside; the base 3 has an air release port, the inner end of which is connected to the air release port; the air release port and the air inlet cavity 34 are blocked by the piston body 52, and when the piston body 52 moves downward to below the air release port, the air release port and the air inlet cavity 34 are connected.

[0059] In this way, when the gas injected into the air inlet chamber 34 exceeds the preset value, or the gasket is worn too much, resulting in excessive compression of the pressure spring 51, the excess gas can be discharged through the vent and the air inlet chamber 34, thereby protecting the pressure spring 51 and the base 3 and increasing the service life of the stopper.

[0060] The air inlet cavity 34 includes an outer cavity section, a middle cavity section and an inner cavity section. In the horizontal direction, the inner cavity section, the middle cavity section and the outer cavity section are connected in sequence and arranged in communication. The outer end of the outer cavity section is used for gas injection, and the inner end of the inner cavity section is connected to the bottom cavity 31. The diameter of the outer cavity section is larger than that of the inner cavity section, and the middle cavity section is arranged in an expanded shape along the direction toward the outer cavity section. In this way, the gas is transferred along the outer cavity section to the middle cavity section and the inner cavity section, which accelerates the gas and facilitates the injection of the gas.

[0061] The pneumatic buffer stopper includes at least one fixing member 4, which is arranged through the base 3. The fixing member 4 includes a screw and a limit head 42. The outer end of the screw and the limit head 42 are connected. The screw runs through the base 3. The inner end of the screw forms a screw head 41. The screw head 41 is arranged to rotate under the rotational force. The pneumatic buffer stopper is installed on the conveying platform 6. The conveying platform 6 includes a transverse rail frame, which has an inner rail groove 62 and an outer rail groove 61. The inner rail groove 62 and the outer rail groove 61 are connected and arranged. The inner rail groove 62 and the outer rail groove 61 are respectively extended along the conveying direction. The limit head 42 includes an outer limit part and an inner limit part. The outer limit part and the inner limit part are connected and arranged in a stepped manner. The outer limit part is embedded with the outer rail groove 61, and the inner limit part is embedded with the inner rail groove 62.

[0062] In this way, the setting position of the pneumatic buffer stopper can be adjusted as needed. The screw head 41 is arranged to rotate under the rotational force and can be tightened or loosened to adjust the setting position of the pneumatic buffer stopper. At the same time, with the cooperation of the inner rail groove 62 and the outer rail groove 61, the setting stability of the pneumatic buffer stopper is enhanced, so that the pneumatic buffer stopper will not shake when performing the stopping function, thereby ensuring the accuracy of the stopping position of the pneumatic buffer stopper.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Pneumatic buffer stopper, characterized in that: The cam is provided with a plurality of locking members, each of which is provided with a plurality of locking members, and the plurality of locking members are provided with a plurality of locking members, each of which is provided with a plurality of locking members. The plurality of locking members are provided with a plurality of locking members, and the plurality of locking members are provided with a plurality of locking members. The driving member includes a pressure spring, a piston body and a driving shaft, the lower part of the pressure spring is fixedly arranged, the upper part of the pressure spring and the piston body are pressed against each other, the lower part of the driving shaft is connected to the piston body, the upper part of the driving shaft is connected to the buffer seat, and the pressure spring is used to make the buffer seat be in an ejected state; The base has a bottom cavity and an air inlet cavity, the bottom cavity and the air inlet cavity are connected, the piston body is placed in the bottom cavity, the base has an air inlet, the air inlet is arranged above the piston body, the air inlet cavity and the air inlet are connected, the air inlet cavity is used to inject gas into the bottom cavity and push the piston body to move in the direction toward the pressure spring; The base has a lower buffer cavity, and the buffer seat has an upper buffer cavity, the upper buffer cavity is connected with the main buffer cavity, the inner end of the lower buffer cavity is connected with the bottom cavity, and the outer ends of the upper buffer cavity and the lower buffer cavity are arranged correspondingly from top to bottom; when the buffer seat and the base are in a conflicting arrangement, the upper buffer cavity and the lower buffer cavity are connected and arranged in a vertically docking manner, and the inner end of the lower buffer cavity is connected with the air inlet cavity through the bottom cavity; in the release state, the gas passes through the lower buffer cavity in sequence. The punching cavity and the upper buffer cavity are filled to the main buffer cavity; the upper buffer cavity includes a longitudinal cavity and a transverse cavity group, the longitudinal cavity is extended along the longitudinal direction, the transverse cavity group is extended along the transverse direction, and the inner end of the transverse cavity group is connected with the main buffer cavity, the outer end of the transverse cavity group is connected with the upper part of the longitudinal cavity, and the lower part of the longitudinal cavity is correspondingly arranged with the lower buffer cavity along the upper and lower sides; the lower part of the longitudinal cavity forms a longitudinal cavity head, and the caliber of the longitudinal cavity head is larger than the caliber of the outer end of the lower buffer cavity; The base has an air leakage cavity, the inner end of the air leakage cavity is connected to the bottom cavity, and the outer end of the air leakage cavity is connected to the outside; the base has an air leakage port, the inner end of the air leakage cavity is connected to the air leakage port; the air leakage port and the air inlet cavity are blocked by the piston body, and when the piston body moves downward to below the air leakage port, the air leakage port and the air inlet cavity are connected; The pneumatic buffer stopper includes at least one fixing part, the fixing part is arranged through the base, the fixing part includes a screwing part and a limit head, the outer end of the screwing part and the limit head are connected, the screwing part is arranged through the base, the inner end of the screwing part forms a screwing head, and the screwing head is arranged to rotate under the rotational force; the pneumatic buffer stopper is installed on the conveying platform, and the conveying platform includes a transverse rail frame, the transverse rail frame has an inner rail groove and an outer rail groove, the inner rail groove and the outer rail groove are connected and arranged, and the inner rail groove and the outer rail groove are respectively extended along the conveying direction, the limit head includes an outer limit part and an inner limit part, the outer limit part and the inner limit part are connected and arranged in a stepped manner, the outer limit part is embedded in the outer rail groove, and the inner limit part is embedded in the inner rail groove.

2. The pneumatic buffer stopper according to claim 1, characterized in that: The transverse cavity group includes a first long cavity, a wide cavity and a second long cavity. The first long cavity and the second long cavity are respectively extended along the length direction. The two ends of the wide cavity are respectively connected with the first long cavity and the second long cavity. The first long cavity is connected with the main buffer cavity, and the second long cavity is connected with the upper part of the longitudinal cavity.

3. The pneumatic buffer stopper according to claim 2, characterized in that: The outer end of the first long cavity is connected to the wide cavity, the inner end of the first long cavity forms a first cavity opening, and the first cavity opening is staggered with the stop member.

4. The pneumatic buffer stopper according to claim 1, characterized in that: The stop head includes an outer baffle plate and an inner embedded head, the outer baffle plate and the inner embedded head are connected and arranged, the inner embedded head is embedded with the buffer seat, and the outer baffle plate is arranged outside the buffer seat; the base includes two extension plates and a rear clamping plate, the two extension plates are arranged in a spaced relationship, the buffer seat is arranged between the two extension plates, and the outer baffle plate and the rear clamping plate clamp the buffer seat.

5. The pneumatic buffer stopper according to any one of claims 1 to 3, characterized in that: The air inlet cavity comprises an outer cavity section, a middle cavity section and an inner cavity section. Along the horizontal direction, the inner cavity section, the middle cavity section and the outer cavity section are connected in sequence and arranged in communication. The outer end of the outer cavity section is used for gas injection, and the inner end of the inner cavity section is arranged in communication with the bottom cavity. The caliber of the outer cavity section is larger than that of the inner cavity section, and the middle cavity section is arranged in a flared shape in the direction toward the outer cavity section.

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