Stop mechanism

Abstract

A stopping mechanism comprises a mounting seat, a stopping piece, a lifting driving piece, a buffering rod and an adjusting piece, wherein the stopping piece and the lifting driving piece are arranged on the mounting seat; the stop piece is slidably arranged on the mounting base in the first direction, a vent hole extending in the first direction and a gas collecting hole extending in the second direction are formed in the stop piece, and the vent hole is located in one end of the stop piece and communicates with the gas collecting hole; the lifting driving piece is connected with the stopping piece and drives the stopping piece to move in the first direction; the buffer rod is slidably arranged at one end, away from the vent hole, of the gas collection hole; the adjusting piece is arranged at the end, close to the vent hole, of the gas collecting hole and right faces the vent hole. When the stopping mechanism stops the product, the buffer rod can effectively absorb kinetic energy of the product, the probability that the product is rebounded is reduced, and therefore the accuracy of stopping the product is improved. The buffer speed of the buffer rod can be conveniently adjusted only by moving the adjusting piece to limit the transmission speed of the gas between the gas collecting hole and the vent hole.

Description

Technical Field

[0001] The present application relates to the technical field of stop mechanisms, and in particular to a stop mechanism. Background Art

[0002] When the transmission line transfers the product to the predetermined position, it needs to be stopped by a stop mechanism. The current stop mechanism usually uses a stop block to abut and stop the product. However, the method of using a stop block to stop the product is difficult to accurately stop the product because the buffering force of the product is large, which easily causes the product to rebound. In addition, the method of using a stop block to stop the product cannot adjust the buffering speed. Utility Model Content

[0003] In view of the above, it is necessary to propose a stop mechanism to improve the accuracy of the stop product and to be able to adjust the buffer speed.

[0004] An embodiment of the present application provides a stopping mechanism, including a mounting seat, a stopper, a lifting drive, a buffer rod and an adjusting member; the stopper is slidably arranged on the mounting seat along a first direction, the stopper is provided with an air vent extending along the first direction and an air collecting hole extending along a second direction, the air vent is located at one end of the stopper and is connected to the air collecting hole, and the first direction and the second direction are perpendicular to each other; the lifting drive is arranged on the mounting seat and connected to the stopper, and the lifting drive drives the stopper to move along the first direction; the buffer rod is slidably arranged at one end of the air collecting hole away from the air collecting hole and extends out of the air collecting hole; the adjusting member is arranged at one end of the air collecting hole close to the air collecting hole and is opposite to the air collecting hole, and the adjusting member limits the speed of gas transmission between the air collecting hole and the air collecting hole to adjust the buffering speed of the buffer rod.

[0005] The above-mentioned stopping mechanism is convenient for stopping and releasing the product by sliding the stopper on the mounting seat and arranging a lifting drive member to drive the stopper to move. By providing a connected air vent and air collecting hole on the stopper, and sliding the buffer rod on the air collecting hole, and arranging the adjusting member at one end of the air collecting hole close to the air vent and facing the air vent, when the stopping mechanism stops the product, the buffer rod abuts against the product and moves toward the adjusting member under the pressure of the product, and the gas in the air collecting hole is compressed and discharged through the air vent. The buffer rod can effectively absorb the kinetic energy of the product and reduce the probability of the product being bounced back, which is beneficial to improve the accuracy of stopping the product. When the buffering speed of the buffer rod is too fast or too slow, the buffering speed of the buffer rod can be adjusted by only moving the adjusting member to limit the speed of gas transmission between the air collecting hole and the air vent, so that the buffering speed of the buffer rod can be conveniently adjusted when the stopping mechanism stops the product.

[0006] In some embodiments, the mounting seat is provided with sliding holes and avoidance holes extending along the first direction and arranged at intervals; the stopper includes a sliding portion, an air collecting portion and a ventilation portion, the sliding portion and the ventilation portion are arranged at both ends of the air collecting portion at intervals and extend along the first direction, the sliding portion is slidably arranged in the sliding hole and is connected to the lifting drive member, the ventilation portion extends into the avoidance hole, the air collecting hole is opened in the air collecting portion, and the ventilation hole is opened in the ventilation portion.

[0007] In some embodiments, a side of the mounting seat close to the air collecting portion is further provided with a limit groove extending along the second direction and having two ends respectively connected to the sliding hole and the avoidance hole, and the limit groove abuts against the air collecting portion to limit the distance that the lifting drive member drives the stop member to move.

[0008] In some embodiments, one end of the buffer rod extending into the air collecting hole is provided with two spaced-apart limit protrusions along the radial direction of the buffer rod, and the stopping mechanism also includes a first sealing ring, which is sleeved on the buffer rod and located between the two limit protrusions.

[0009] In some embodiments, the stopping mechanism also includes a limiting member, which is disposed on the mounting seat and covers an end of the air collecting hole away from the air vent, and the limiting member is provided with a first through hole opposite to the air collecting hole, and the buffer rod passes through the first through hole, and the limiting member abuts against the limiting protrusion away from the air vent to limit the buffer rod from falling out of the air collecting hole.

[0010] In some embodiments, the stopping mechanism also includes a buffer block, which is arranged on a side of the mounting seat away from the adjusting member, and the limiting member is located between the mounting seat and the buffer block, the buffer block is provided with a second through hole opposite to the first through hole, and the buffer rod passes through the first through hole and the second through hole and extends from a side of the buffer block away from the mounting seat.

[0011] In some embodiments, the air collecting hole includes an air collecting section, a conduction section and an adjustment section connected in sequence, the diameter of the conduction section is smaller than the diameters of the air collecting section and the adjustment section, the air hole is connected to the adjustment section, the buffer rod is slidably disposed on the air collecting section and extends out of one end of the air collecting section away from the conduction section, and the adjustment member is disposed on the adjustment section and extends into the conduction section.

[0012] In some embodiments, the adjusting member includes a sealing portion, a connecting portion and an adjusting portion connected in sequence, the sealing portion closes the end of the adjusting section away from the conducting section, the connecting portion is connected to the adjusting section and is opposite to the vent, the end of the adjusting section away from the connecting portion extends into the conducting section, and along the direction away from the connecting portion, the size of the cross-section of the end of the adjusting section away from the connecting portion gradually decreases.

[0013] In some embodiments, the sealing portion is provided with a stop ring groove along the circumferential direction, and the stop mechanism further includes a second sealing ring, and the second sealing ring is sleeved in the stop ring groove.

[0014] In some embodiments, the stopping mechanism further includes a control member, which is disposed at one end of the vent away from the gas collecting hole, and the control member controls the gas to flow into or out of the vent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the stop mechanism provided in an embodiment of the present application.

[0016] Figure 2 yes Figure 1 The schematic diagram of the exploded structure of the stop mechanism is shown.

[0017] Figure 3 yes Figure 1 The cross-sectional view of the blocking mechanism shown is along the III-III direction.

[0018] Figure 4 yes Figure 3 Magnified view of area A.

[0019] Figure 5 yes Figure 1 A schematic three-dimensional structural diagram of an adjusting member in a stopping mechanism is shown.

[0020] Main component symbols

[0021] Stop mechanism 100

[0022] Mounting Block 10

[0023] Mounting frame 11

[0024] Mounting plate 12

[0025] Adjustment hole 121

[0026] Avoidance hole 122

[0027] Mounting block 13

[0028] Sliding hole 131

[0029] Limiting slot 132

[0030] Stopper 20

[0031] Gas collecting unit 21

[0032] Air collection hole 211

[0033] Gas Gathering Section 2111

[0034] Conducting section 2112

[0035] Adjustment section 2113

[0036] Sliding portion 22

[0037] Mounting slot 221

[0038] Ventilation section 23

[0039] Ventilation hole 231

[0040] Lifting drive 30

[0041] Buffer rod 40

[0042] Limiting protrusion 41

[0043] Adjustment 50

[0044] Sealing part 51

[0045] Stop ring groove 511

[0046] Twist slot 512

[0047] Connecting portion 52

[0048] Avoidance surface 521

[0049] Adjustment unit 53

[0050] Limiter 60

[0051] First perforation 61

[0052] Buffer block 70

[0053] Second perforation 71

[0054] Mounting slot 72

[0055] Trachea connector 81

[0056] Controls 82

[0057] First sealing ring 91

[0058] Second sealing ring 92 DETAILED DESCRIPTION

[0059] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0060] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0061] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0062] See also Figure 1 and Figure 2 , the embodiment of the present application provides a stopping mechanism 100 for stopping a product. For ease of understanding and explanation, the embodiment of the present application defines the first direction as Figure 1 and Figure 2 The Z-axis direction is shown, and the second direction is Figure 1 and Figure 2 In the X-axis direction shown, the first direction and the second direction are perpendicular to each other. Obviously, this is not a limitation of the embodiment of the present application.

[0063] See also Figure 1 , Figure 2 and Figure 3The stopping mechanism 100 of the present embodiment includes a mounting seat 10, a stopper 20 and a lifting drive member 30 provided on the mounting seat 10, a buffer rod 40 provided on the stopper 20, an adjusting member 50, a limiting member 60, a buffer block 70 and an air pipe joint 81, a first sealing ring 91 sleeved on the buffer rod 40, a second sealing ring 92 sleeved on the adjusting member 50, and a control member 82 connected to the air pipe joint 81. The mounting seat 10 is mounted on a transmission line (not shown in the figure), the stopper 20 is slidably provided on the mounting seat 10 along a first direction, the stopper 20 is provided with an air vent 231 extending along the first direction and an air collecting hole 211 extending along the second direction, the air vent 231 is located at one end of the stopper 20 and is connected to the air collecting hole 211, in the present embodiment, the lifting drive member 30 is a telescopic cylinder, the lifting drive member 30 is provided on the mounting seat 10 and is connected to the stopper 20, so as to prevent the air vent 231 from being damaged. The stopper 20 is driven to move along the first direction so that the stopper 20 stops or releases the product. The buffer rod 40 is slidably arranged at the end of the air collecting hole 211 away from the vent hole 231 and extends out of the air collecting hole 211. The adjusting member 50 is arranged at the end of the air collecting hole 211 close to the vent hole 231 and directly faces the vent hole 231. The limiting member 60 is arranged on the mounting seat 10 and covers the end of the air collecting hole 211 away from the vent hole 231. The limiting member 60 has a space for contacting with the air collecting hole 211. 11 is opposite to the first through hole 61, the buffer block 70 can be made of elastic materials such as rubber, the buffer block 70 is arranged on the side of the mounting seat 10 away from the adjusting member 50, the buffer block 70 is provided with a second through hole 71 and an assembly groove 72, the second through hole 71 is opposite to the first through hole 61, the assembly groove 72 is located on the side of the buffer block 70 facing the stopper 20 and is connected to the second through hole 71, the buffer block 70 is arranged in the assembly groove 72 and is located between the mounting seat 10 and the buffer block 70, the buffer rod 40 passes through the first through hole 61 and the second through hole 71 and extends from the side of the buffer block 70 away from the mounting seat 10, the air pipe joint 81 is arranged at the end of the vent 231 away from the gas collecting hole 211, the control member 82 can be a solenoid valve, the control member 82 is connected to the air pipe joint 81, and is arranged at the end of the vent 231 away from the gas collecting hole 211 through the air pipe joint 81, and the control member 82 controls the gas to flow into or out of the vent 231.

[0064] The process of the stopping mechanism 100 of the present embodiment stopping the product is roughly as follows: the lifting drive member 30 drives the stop member 20, the buffer rod 40, the limit member 60 and the buffer block 70 to extend out of the transmission line along the first direction, the buffer rod 40 abuts against the product and moves toward the adjustment member 50 under the pressure of the product, the gas in the gas collecting hole 211 is compressed and discharged through the vent hole 231, the air pipe joint 81 and the control member 82, and the adjustment member 50 limits the speed of gas transmission between the gas collecting hole 211 and the vent hole 231 , so that the buffering speed of the buffer rod 40 can be adjusted. When the product abuts against the buffer block 70 under the buffering of the buffer rod 40, the product is stopped. When the product processing is completed, the lifting drive member 30 drives the stop member 20, the buffer rod 40, the limit member 60 and the buffer block 70 to return to release the product. The control member 82 controls the gas to flow into the vent hole 231. The gas enters the gas collecting hole 211 through the vent hole 231 to return the buffer rod 40, thereby facilitating the buffer rod 40 to buffer the product again.

[0065] In this embodiment, the mounting seat 10 includes a mounting frame 11, a mounting plate 12 connected to the mounting frame 11, and a mounting block 13 connected to the mounting plate 12. The mounting frame 11 is connected to the transmission line, and the mounting plate 12 is provided with an adjustment hole 121 and an avoidance hole 122. The adjustment hole 121 is an elliptical long hole. The mounting plate 12 and the mounting frame 11 are connected by connecting bolts (not shown) passing through the adjustment hole 121, so as to facilitate the adjustment of the position of the mounting plate 12 relative to the mounting frame 11. The mounting block 13 is provided at one end of the mounting plate 12 away from the mounting frame 11. The mounting block 13 is provided with a sliding hole 131. The sliding hole 131 and the avoidance hole 122 extend along the first direction and are arranged at intervals. The stopper 20 is slidably provided in the sliding hole 131 and a part of it extends into the avoidance hole 122. The lifting drive member 30 is provided on the mounting block 13 and connected to the stopper 20. The air pipe joint 81 extends into the avoidance hole 122 and is connected to the vent hole 231. The mounting seat 10 is further provided with a limiting groove 132 extending along the second direction and having two ends respectively connected to the sliding hole 131 and the avoidance hole 122 . A portion of the limiting groove 132 is located on the mounting plate 12 , and another portion of the limiting groove 132 is located on the mounting block 13 .

[0066] In some other embodiments, the mounting frame 11, the mounting plate 12 and the mounting block 13 may also be an integrated structure, which is not specifically limited in the embodiments of the present application.

[0067] In this embodiment, the stopper 20 includes a gas collecting portion 21 and a sliding portion 22 and a vent portion 23 which are spaced apart at both ends of the gas collecting portion 21 and extend along the first direction. The gas collecting portion 21, the sliding portion 22 and the vent portion 23 are all block-shaped. The width of the sliding portion 22 is greater than the width of the gas collecting portion 21 and the vent portion 23. The sliding portion 22 is slidably arranged in the sliding hole 131 and connected to the lifting drive member 30. The vent portion 23 extends into the avoidance hole 122. The gas collecting hole 211 is opened in the gas collecting portion 21 and passes through the two ends of the gas collecting portion 21. The vent hole 231 is provided at the vent part 23, and the limit groove 132 is specifically provided at one side of the mounting seat 10 close to the gas collecting part 21. The limit groove 132 abuts against the gas collecting part 21 to limit the distance that the lifting driving member 30 drives the stopper 20 to move, thereby facilitating the accuracy of the lifting driving member 30 driving the stopper 20 to return to its original position. In addition, the sliding hole 131, the avoidance hole 122 and the limit groove 132 cooperate to facilitate the stopper 20 to be moved into the mounting seat 10 to release the product when the stopper 20 returns to its original position. The side of the sliding part 22 away from the vent part 23 is provided with a mounting groove 221 connected to the gas collecting hole 211, and the limiter 60 and the buffer block 70 are both arranged in the mounting groove 221, thereby facilitating the accuracy of the installation of the limiter 60 and the buffer block 70.

[0068] Please refer to Figure 4 In this embodiment, the gas collecting hole 211 includes a gas collecting section 2111, a conducting section 2112 and an adjusting section 2113 which are connected in sequence. The diameters of the gas collecting section 2111 and the adjusting section 2113 are substantially the same, the diameter of the conducting section 2112 is smaller than the diameters of the gas collecting section 2111 and the adjusting section 2113, the vent 231 is connected to the adjusting section 2113, the buffer rod 40 is slidably disposed on the gas collecting section 2111 and extends out of one end of the gas collecting section 2111 away from the conducting section 2112, and the adjusting member 50 is disposed on the adjusting section 2113 and extends into the conducting section 2112. When it is necessary to adjust the buffering speed of the buffer rod 40, it is only necessary to move the adjusting member 50 to adjust the area of ​​the conducting section 2112 blocked by the adjusting member 50, thereby facilitating the improvement of the accuracy and convenience of adjusting the buffering speed of the buffer rod 40.

[0069] In the present embodiment, one end of the buffer rod 40 extending into the air collecting hole 211 is provided with two spaced apart limiting protrusions 41 along the radial direction of the buffer rod 40, and the two limiting protrusions 41 are both annular. The first sealing ring 91 is sleeved on the buffer rod 40 and is located between the two limiting protrusions 41. The two limiting protrusions 41 can limit the movement of the first sealing ring 91 relative to the buffer rod 40, thereby facilitating the improvement of the stability and accuracy of the buffer rod 40 in buffering the product. In addition, when the buffer rod 40 returns to its original position, the limiting member 60 abuts against the limiting protrusion 41 away from the air vent 231, thereby facilitating the buffer rod 40 from falling out of the air collecting hole 211 and facilitating the improvement of the accuracy of the return of the buffer rod 40.

[0070] Please refer to further Figure 5 In this embodiment, the adjusting member 50 includes a sealing portion 51, a connecting portion 52 and an adjusting portion 53 connected in sequence. The sealing portion 51 closes the end of the adjusting section 2113 away from the conducting section 2112. The sealing portion 51 is provided with a stop ring groove 511 along the circumferential direction. The second sealing ring 92 is sleeved in the stop ring groove 511, which is conducive to improving the sealing effect of the sealing portion 51. The end of the sealing portion 51 away from the connecting portion 52 is provided with a twisting groove 512, so that it is convenient to use a tool such as a screwdriver (not shown) to insert the twisting groove 512 to drive the adjusting member 50 to rotate. The connecting portion 52 and the adjusting section 2113 are connected to each other. 13 is connected and is opposite to the vent hole 231. The connecting portion 52 can be specifically threadedly connected to the adjusting section 2113. The peripheral side wall of the connecting portion 52 is provided with an avoidance surface 521 extending from the sealing portion 51 to the adjusting portion 53. The avoidance surface 521 can ensure that the connecting portion 52 will not block the adjusting section 2113, so that the gas can flow normally between the vent hole 231 and the conducting section 2112. One end of the regulating portion 53 away from the connecting portion 52 extends into the conducting section 2112, and along the direction away from the connecting portion 52, the size of the cross-section of the end of the regulating portion 53 away from the connecting portion 52 gradually decreases. Specifically, one end of the adjustment portion 53 away from the connecting portion 52 is roughly conical. When the buffering speed of the buffer rod 40 needs to be adjusted, a screwdriver can be inserted into the twisting groove 512 and the adjusting member 50 can be screwed to adjust the area of ​​the blocking conduction section 2112 of the adjustment portion 53. Since the sealing portion 51 can prevent gas from overflowing from the gas collecting hole 211 and the conical design of the adjustment portion 53 facilitates the adjustment of the area of ​​the blocking conduction section 2112, it is beneficial to improve the accuracy of adjusting the buffering speed of the buffer rod 40.

[0071] In some other embodiments, the end of the sealing portion 51 away from the connecting portion 52 is provided with two torsion grooves 512 arranged in a cross shape, and the peripheral side wall of the connecting portion 52 may also be provided with a connecting notch (not shown) to connect the sealing portion 51 and the adjusting portion 53. The embodiments of the present application do not specifically limit this.

[0072] In summary, the stopping mechanism 100 of the embodiment of the present application is convenient for stopping and releasing the product by sliding the stopper 20 on the mounting seat 10, and arranging the lifting drive member 30 to drive the stopper 20 to move, and by providing a connected vent hole 231 and an air collecting hole 211 on the stopper 20, and sliding the buffer rod 40 on the air collecting hole 211, and arranging the adjusting member 50 at one end of the air collecting hole 211 close to the vent hole 231 and facing the vent hole 231. When the stopping mechanism 100 stops the product, the buffer rod 40 abuts against the product and The product moves toward the adjusting member 50 under the extrusion, and the gas in the air collecting hole 211 is compressed and discharged through the vent hole 231. The buffer rod 40 can effectively absorb the kinetic energy of the product and reduce the probability of the product being rebounded, which is beneficial to improve the accuracy of stopping the product. When the buffering speed of the buffer rod 40 is too fast or too slow, it is only necessary to move the adjusting member 50 to limit the speed of gas transmission between the air collecting hole 211 and the vent hole 231 to adjust the buffering speed of the buffer rod 40, so that the buffering speed of the stopping mechanism 100 when stopping the product can be conveniently adjusted.

[0073] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A stop mechanism, characterized in that: include: Mounting seat; A stopper is slidably disposed on the mounting seat along a first direction, the stopper is provided with a vent hole extending along the first direction and a gas collecting hole extending along a second direction, the vent hole is located at one end of the stopper and is connected to the gas collecting hole, and the first direction and the second direction are perpendicular to each other; A lifting driving member, disposed on the mounting seat and connected to the stopper, wherein the lifting driving member drives the stopper to move along the first direction; A buffer rod is slidably disposed at one end of the air collecting hole away from the air vent and extends out of the air collecting hole; The adjusting member is arranged at one end of the gas collecting hole close to the vent hole and directly opposite to the vent hole, and the adjusting member limits the speed of gas transmission between the gas collecting hole and the vent hole to adjust the buffering speed of the buffer rod.

2. The stop mechanism according to claim 1, characterized in that: The mounting seat is provided with sliding holes and avoidance holes extending along the first direction and arranged at intervals; The stopper includes a sliding portion, an air collecting portion and a ventilation portion, wherein the sliding portion and the ventilation portion are spaced apart at both ends of the air collecting portion and extend along the first direction, the sliding portion is slidably arranged in the sliding hole and is connected to the lifting drive member, the ventilation portion extends into the avoidance hole, the air collecting hole is opened in the air collecting portion, and the ventilation hole is opened in the ventilation portion.

3. The stop mechanism according to claim 2, characterized in that: A limiting groove extending along the second direction and having two ends connected to the sliding hole and the avoidance hole respectively is provided on one side of the mounting seat close to the air collecting part. The limiting groove abuts against the air collecting part to limit the distance that the lifting drive member drives the stop member to move.

4. The stopping mechanism according to claim 1, characterized in that: One end of the buffer rod extending into the air collecting hole is provided with two spaced limiting protrusions along the radial direction of the buffer rod, and the stopping mechanism also includes a first sealing ring, which is sleeved on the buffer rod and located between the two limiting protrusions.

5. The stopping mechanism according to claim 4, characterized in that: The stopping mechanism also includes a limiting member, which is arranged on the mounting seat and covers an end of the air collecting hole away from the air vent. The limiting member is provided with a first through hole directly opposite to the air collecting hole, and the buffer rod passes through the first through hole. The limiting member abuts against the limiting protrusion away from the air vent to limit the buffer rod from falling out of the air collecting hole.

6. The stopping mechanism according to claim 5, characterized in that: The stopping mechanism also includes a buffer block, which is arranged on a side of the mounting seat away from the adjusting member, and the limiting member is located between the mounting seat and the buffer block, the buffer block is provided with a second through hole opposite to the first through hole, and the buffer rod passes through the first through hole and the second through hole and extends from a side of the buffer block away from the mounting seat.

7. The stopping mechanism according to claim 1, characterized in that: The air collecting hole includes an air collecting section, a conduction section and an adjustment section which are connected in sequence. The diameter of the conduction section is smaller than the diameters of the air collecting section and the adjustment section. The air hole is connected to the adjustment section. The buffer rod is slidably arranged on the air collecting section and extends out of one end of the air collecting section away from the conduction section. The adjustment member is arranged on the adjustment section and extends into the conduction section.

8. The stopping mechanism according to claim 7, characterized in that: The adjusting member comprises a sealing portion, a connecting portion and an adjusting portion which are connected in sequence, the sealing portion closes an end of the adjusting section away from the conducting section, the connecting portion is connected to the adjusting section and faces the vent hole, an end of the adjusting section away from the connecting portion extends into the conducting section, and the size of the cross section of the end of the adjusting section away from the connecting portion gradually decreases along the direction away from the connecting portion.

9. The stopping mechanism according to claim 8, characterized in that: The sealing portion is provided with a stop ring groove along the circumferential direction, and the stop mechanism further includes a second sealing ring, and the second sealing ring is sleeved in the stop ring groove.

10. The stopping mechanism according to claim 1, characterized in that: The stopping mechanism further includes a control component, which is disposed at one end of the vent hole away from the gas collecting hole, and controls the gas to flow into or out of the vent hole.

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