Tightening device for waterproof ventilation valve

Abstract

The utility model discloses a waterproof ventilation valve tightening device which comprises a torque wrench and is characterized by further comprising a sleeve upper section, a sleeve middle section and a sleeve lower section which are coaxial. The top of the sleeve middle section is fixedly connected with the bottom of the sleeve upper section through welding, the sleeve middle section and the sleeve upper section are the same in inner diameter and outer diameter, a connecting hole is formed in the top of the sleeve upper section, and the sleeve upper section can be connected with a torque wrench through the connecting hole; the bottom of the sleeve middle section is fixedly connected with the top of the sleeve lower section through welding, the sleeve middle section and the sleeve lower section are identical in outer diameter, a polygonal hole matched with the waterproof air leakage valve is formed in the center of the sleeve lower section, and the radius of a circumcircle of the polygonal hole is smaller than the inner diameter of the sleeve middle section. According to the tightening device for the waterproof ventilation valve, more materials can be saved on the premise that the torque and the strength of the contact part between the tightening device and the waterproof ventilation valve are guaranteed, and then the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gearbox assembly, specifically relates to a waterproof breather valve tightening device. BACKGROUND

[0002] In the gearbox assembly process, the waterproof breather valve is because hexagonal twist tight side's opposite side distance is bigger but thickness is thinner, and the part allows to tighten the torque requirement is strict, uses the wrench twist tight and can cause hexagonal twist tight side wear and tear to be seriously injured and the condition of spare part damage, cannot pass the qualified fixed twist and leads to the risk of later period loosening.

[0003] Therefore, the waterproof breather valve is mostly installed by using torque wrench and corresponding sleeve, the bottom of the sleeve is polygonal groove corresponding to the waterproof breather valve, and in the production of the existing sleeve, milling of solid rod material is mostly used, in order to ensure the contact strength between the waterproof breather valve, enough allowance is needed beside the polygonal groove, and the wall thickness of the side wall is thickened together in the overall processing, which undoubtedly causes unnecessary material waste and cost increase under the strength requirement of the side wall. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims at providing a waterproof breather valve tightening device to solve the technical problem of cost increase caused by thickening of the sleeve side wall together with the waterproof breather valve for the purpose of strengthening the connection strength between the sleeve and the waterproof breather valve.

[0005] In order to achieve the foregoing utility model purposes, the utility model adopts the technical scheme including:

[0006] A waterproof breather valve tightening device includes a torque wrench, and coaxial sleeve upper segment, sleeve middle segment and sleeve lower segment.

[0007] The top of the sleeve middle segment and the bottom of the sleeve upper segment are fixedly connected by welding, the inner diameter and the outer diameter of the sleeve middle segment and the sleeve upper segment are the same, the top of the sleeve upper segment is provided with a connecting hole, and the torque wrench can be connected to the sleeve upper segment through the connecting hole.

[0008] The bottom of the sleeve middle segment and the top of the sleeve lower segment are fixedly connected by welding, the outer diameter of the sleeve middle segment and the sleeve lower segment is the same, the center of the sleeve lower segment is provided with a polygonal hole matched with the waterproof breather valve, and the radius of the circumscribed circle of the polygonal hole is smaller than the inner diameter of the sleeve middle segment.

[0009] Further, the connecting cylinder, the side stop assembly, the pushing assembly and the limiting mechanism are further included; the connecting cylinder is detachably arranged on the middle section of the sleeve, the side stop assembly is provided with a plurality of side stop assemblies and is slidably arranged on the bottom of the connecting cylinder; the pushing assembly is slidably connected to the connecting cylinder, and the descent of the pushing assembly can simultaneously make each side stop assembly slide to the center of the lower section of the sleeve; the limiting mechanism is arranged on the connecting cylinder and can limit the position of the pushing assembly. Through the structure, the waterproof and breathable valve of different sizes can be applied, and the applicability is wider.

[0010] Further, the side stop assembly includes a sliding rod, a side stop plate and an elastic rope; the sliding rod is slidably connected to the bottom of the connecting cylinder, one end of the sliding rod away from the polygonal hole is provided with an inclined surface, the descent of the pushing assembly can press the inclined surface and make the sliding rod slide to the center of the lower section of the sleeve; one end of the sliding rod close to the polygonal hole is provided with the side stop plate, and the sliding rod is connected with the connecting cylinder through the elastic rope.

[0011] Further, the limiting mechanism includes a rotating assembly and a limiting assembly; the rotating assembly and the limiting assembly are respectively rotatably connected to the connecting cylinder, the lifting of the pushing assembly can drive the rotating assembly to rotate, and the limiting assembly is provided with two limiting assemblies and respectively limits the forward rotation and the reverse rotation of the rotating assembly.

[0012] Further, the rotating assembly includes a driven shaft, a gear and a ratchet; the driven shaft is rotatably connected to the connecting cylinder, the gear and the ratchet are respectively coaxially fixed to the driven shaft, and the lifting of the pushing assembly can drive the gear to rotate; the ratchet is provided with two groups, the rotation directions of the ratchet teeth of the two ratchets are opposite, the limiting assembly and the ratchet one-to-one correspond, and the limiting assembly can limit the rotation of the ratchet in one direction.

[0013] Further, the limiting assembly includes a limiting shaft, a pawl and a torsional spring; the limiting shaft is arranged on the connecting cylinder, the pawl is rotatably arranged on the limiting shaft and connected with the connecting cylinder through the torsional spring, and the pawl can limit the one-way rotation of the ratchet.

[0014] Further, the pushing assembly includes a pushing cylinder and a rack; the pushing cylinder is slidably connected to the connecting cylinder, the descent of the pushing cylinder can press the inclined surface of the sliding rod and make the sliding rod slide to the center; the rack is fixed to the pushing cylinder and engaged with the gear. It should be understood that the rack is always engaged with the gear.

[0015] Further, the driving member is slidably connected to the connecting cylinder, and is connected to the pawl limiting the reverse rotation of the ratchet wheel through the first connecting rope, and the downward sliding of the driving member can drive the pawl to move away from the corresponding ratchet wheel, and then push the pushing cylinder to slide downward.

[0016] Further, the second connecting rope is provided, and the torque wrench is also provided with a connecting ring; one end of the second connecting rope is connected to the pawl limiting the forward rotation of the ratchet wheel, and the other end is tied to the connecting ring. Through the structure, after the tightening operation is completed, the second connecting rope is pulled to make the side blocking assembly slide outward under the elastic force of the side blocking assembly, so that the sleeve is farther away from the waterproof and breathable valve.

[0017] Compared with the prior art, the advantages of the utility model include:

[0018] In the application, the sleeve is divided into three sections for production, and the radius of the circumscribed circle formed by the polygonal hole at the bottom is smaller than the inner diameter of the middle section of the sleeve, so that there is enough lower section of the sleeve between the side surface of the polygonal hole and the middle section of the sleeve after the three parts of the sleeve are assembled, which guarantees the strength of the connection part with the waterproof and breathable valve, and at the same time, since the sleeve is produced separately and welded and installed, the thickness of the connection part between the bottom and the top of the sleeve is not affected by the polygonal groove, so that the overall material cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 It is a schematic view of the assembly of the upper section, the middle section and the lower section of the sleeve of the waterproof and breathable valve tightening device in the utility model;

[0021] Figure 2 It is a schematic view of the assembly of the upper section, the middle section and the lower section of the sleeve of the waterproof and breathable valve tightening device in the utility model; Figure 1

[0022] Figure 3 It is a schematic view of the waterproof and breathable valve tightening device in the utility model;

[0023] Figure 4 It is a schematic view of the assembly of the upper section, the middle section and the lower section of the sleeve of the waterproof and breathable valve tightening device in the utility model; Figure 3

[0024] It is a schematic view of the assembly of the upper section, the middle section and the lower section of the sleeve of the waterproof and breathable valve tightening device in the utility model; Figure 5 Figure 3 ​​An enlarged schematic view of the A portion shown.

[0025] Reference numerals:

[0026] Torsion wrench 10, connecting ring 101, sleeve upper section 11, connecting hole 111, sleeve middle section 12, sleeve lower section 13, polygonal hole 131, connecting cylinder 2, side stop assembly 3, sliding rod 31, side stop plate 32, elastic rope 33, pushing assembly 4, pushing cylinder 41, rack 42, limiting mechanism 5, rotating assembly 51, driven rotating shaft 511, gear 512, ratchet 513, limiting assembly 52, limiting connecting shaft 521, pawl 522, torsional spring 523, driving member 6, first connecting rope 61, second connecting rope 7. DETAILED DESCRIPTION

[0027] In view of the deficiencies in the prior art, the present utility model person has long-term research and a large number of practices, and the technical scheme of the present utility model is obtained. The technical scheme, its implementation process and principles will be further explained in the following combined with the drawings in the embodiments of the present application and specific implementation cases.

[0028] It should be noted that the embodiments described below by reference to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model, and the described embodiments are only a part of the embodiments of the present utility model, but not all the embodiments. Based on the embodiments in the present utility model, the present utility model covers any alternative, modification, equivalent method and scheme defined by the claims, and all other embodiments obtained by the person skilled in the art without creative labor, which belong to the protection scope of the present utility model.

[0029] In the description of the present application, "first", "second", "third" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "a" and similar words do not represent quantity limitation, but represent the existence of at least one. "Include" or "contain" and similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect.

[0030] In the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, when using two sides, outer side, up and down and other positional terms, it should be understood that they are only used for the convenience of understanding and description, considering that the structure can be facing other positions.

[0031] In the description of the present application, unless otherwise explicitly specified and limited, the technical terms or scientific terms used should be understood as the general meaning of the person skilled in the art in the field to which the present application belongs, and the terms "mounting", "connecting" and "connecting" should be understood in a broad sense, for example, it can be fixed connection, it can also be detachable connection, it can also be in contact connection or integral connection; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The embodiments of the utility model aim at introducing and explaining the structure composition of the waterproof and breathable valve tightening device and the cooperation relationship between each component structure, unless otherwise specified, the size, material and manufacturing process of each component part in the waterproof and breathable valve tightening device in the embodiments of the utility model can be selected according to the specific circumstances, which is not particularly limited and explained here.

[0033] Further, in order to enable the public to have a better understanding of the utility model, in the following detailed description of the utility model, some specific details are described in detail. The present utility model can also be completely understood without the description of these details for those skilled in the art.

[0034] Please refer to Figures 1-5 The embodiment provides a waterproof and breathable valve tightening device, which comprises a torque wrench 10, and coaxial sleeve upper segment 11, sleeve middle segment 12 and sleeve lower segment 13.

[0035] The top of the sleeve middle segment 12 and the bottom of the sleeve upper segment 11 are fixedly connected by welding, the inner diameter and the outer diameter of the sleeve middle segment 12 and the sleeve upper segment 11 are same, the top of the sleeve upper segment 11 is provided with a connecting hole 111, and the torque wrench 10 can be connected through the connecting hole 111; specifically, the connecting hole 111 is a square hole matched with the torque wrench 10.

[0036] The bottom of the middle sleeve section 12 and the top of the lower sleeve section 13 are fixed by welding, the outer diameter of the middle sleeve section 12 and the lower sleeve section 13 is the same, and the center of the lower sleeve section 13 is provided with a polygonal hole 131 matched with the waterproof air leakage valve, and the radius of the circumscribed circle of the polygonal hole 131 is smaller than the inner diameter of the middle sleeve section 12.

[0037] That is, the distance from each side of the polygonal hole 131 to the inner wall of the middle sleeve section 12 is not zero, the lower sleeve section 13 is a flat plate, and the polygonal hole 131 is preferably a regular hexagonal hole. It should also be understood that the upper sleeve section 11, the middle sleeve section 12 and the lower sleeve section 13 are manufactured in respective production lines, and then assembled into an integrated whole by welding, and the coaxiality of the integrated whole after welding meets the drawing standard.

[0038] In this application, the sleeve is divided into three sections for production, and the radius of the circumscribed circle formed by the polygonal hole 131 at the bottom is smaller than the inner diameter of the middle sleeve section 12, so that there is enough lower sleeve section 13 between the side of the polygonal hole 131 and the middle sleeve section 12 after the three parts of the sleeve are assembled, which guarantees the strength of the connection part with the waterproof air valve, and at the same time, due to the separate production and welding installation, the thickness of the connection part between the bottom and the top of the sleeve is not affected by the polygonal groove, thereby reducing the material cost of the whole.

[0039] The waterproof air valve has different sizes according to different use scenarios, and the conventional sleeve can only correspond to one size of waterproof air valve, so it is difficult for the same sleeve to cope with different waterproof air valves. To solve such problems, in other schemes, a connecting cylinder 2, a side stop assembly 3, a pushing assembly 4 and a limiting mechanism 5 are further included. The connecting cylinder 2 is detachably arranged on the middle sleeve section 12, and the side stop assembly 3 is arranged in plurality and slidably arranged at the bottom of the connecting cylinder 2. Specifically, the connecting cylinder 2 and the middle sleeve section 12 are coaxial, the connecting cylinder 2 includes a vertical pipe and a bottom support ring which are in close contact with the middle sleeve section 12, the side stop assembly 3 is arranged on the bottom support ring, the bottom support ring is preferably in close contact with the bottom of the lower sleeve section 13, and the inner ring radius is greater than the circumscribed circle of the polygonal hole 131. The side stop assembly 3 and each side of the polygonal hole 131 correspond to each other and slide along the radial direction of the lower sleeve section 13. The pushing assembly 4 is slidably connected to the connecting cylinder 2, and the descent of the pushing assembly 4 can simultaneously slide each side stop assembly 3 to the center of the lower sleeve section 13. The limiting mechanism 5 is arranged on the connecting cylinder 2 and can limit the position of the pushing assembly 4.

[0040] In the embodiment, the connecting cylinder 2 and the sleeve middle section 12 are provided with through holes of the same size, and the installation and dismounting of the connecting cylinder 2 are realized by the limiting rods of the same size passing through the through holes of the connecting cylinder 2 and the sleeve middle section 12 at the same time. It should be understood that different heights of the pushing assembly 4 correspond to different positions of the side blocking assembly 3, and by changing the positions of the side blocking assemblies 3, the size of the polygon surrounded by the side blocking assemblies 3 is changed, so as to adapt to different waterproof and breathable valves, thereby adapting to waterproof and breathable valves of different sizes.

[0041] The structure can be applied to waterproof and breathable valves of different sizes, and has wider applicability.

[0042] In other schemes, the side blocking assembly 3 includes a sliding rod 31, a side blocking plate 32 and an elastic rope 33. The sliding rod 31 is slidingly connected to the bottom of the connecting cylinder 2, and the end of the sliding rod 31 away from the polygonal hole 131 is provided with an inclined surface. The descending of the pushing assembly 4 can press the inclined surface and make the sliding rod 31 slide to the center of the sleeve lower section 13. The end of the sliding rod 31 close to the polygonal hole 131 is provided with the side blocking plate 32, and the sliding rod 31 is connected to the connecting cylinder 2 through the elastic rope 33. Specifically, the elastic rope 33 is arranged on the inner side surface of the bottom of the connecting cylinder 2. It should be understood that the elastic rope 33 in the sliding state is in a stretched state, and an outward force is given to the sliding rod 31. The force is offset by the connecting cylinder 2, so that the position of the sliding rod 31 is fixed. At the same time, when the position is fixed, the side blocking plates 32 abut on the waterproof and breathable valve.

[0043] In other schemes, the limiting mechanism 5 includes a rotating assembly 51 and a limiting assembly 52. The rotating assembly 51 and the limiting assembly 52 are respectively rotatably connected to the connecting cylinder 2. The lifting and lowering of the pushing assembly 4 can drive the rotating assembly 51 to rotate, and vice versa. When the rotating assembly 51 cannot rotate, the pushing assembly 4 also cannot lift and lower. The limiting assembly 52 is provided with two groups and respectively limits the forward rotation and the reverse rotation of the rotating assembly 51.

[0044] It should be understood that the forward rotation and the reverse rotation of the rotating assembly 51 correspond to the lifting and lowering of the pushing assembly 4, respectively. In the embodiment, the forward rotation of the rotating assembly 51 makes the pushing assembly 4 lift, and the reverse rotation of the rotating assembly 51 makes the pushing assembly 4 lower. In use, the corresponding limiting assembly 52 is away from the rotating assembly 51 in advance, so that the pushing assembly 4 can slide. At the same time, it is worth mentioning that the forward rotation is clockwise rotation, and the reverse rotation is counterclockwise rotation.

[0045] In other schemes, the rotating assembly 51 comprises a driven rotating shaft 511, a gear 512 and a ratchet wheel 513; the driven rotating shaft 511 is rotationally connected to the connecting cylinder 2, the gear 512 and the ratchet wheel 513 are coaxially fixed to the driven rotating shaft 511 respectively, and the lifting of the pushing assembly 4 can drive the gear 512 to rotate; the ratchet wheel 513 is provided with two groups, the rotation directions of the ratchet teeth of the two ratchet wheels 513 are opposite, the limiting assembly 52 and the ratchet wheel 513 are one-to-one corresponding, and the rotation of the ratchet wheel 513 can be limited in one direction. Specifically, one limiting assembly 52 limits the forward rotation of the ratchet wheel 513, and the other limiting assembly 52 limits the reverse rotation of the other ratchet wheel 513, and when the gear 512 stops rotating, the pushing assembly 4 also cannot be lifted.

[0046] In other schemes, the limiting assembly 52 comprises a limiting shaft 521, a pawl 522 and a torsional spring 523; the limiting shaft 521 is arranged on the connecting cylinder 2, the pawl 522 is rotationally arranged on the limiting shaft 521 and is connected to the connecting cylinder 2 through the torsional spring 523, and the pawl 522 can limit the one-way rotation of the ratchet wheel 513. Specifically, the pawl 522 of different limiting assemblies 52 limits the one-way rotation of different ratchet wheels 513, and in this embodiment, the pawl 522 close to the pushing assembly 4 limits the reverse rotation, i.e. counterclockwise rotation, of the ratchet wheel 513 close to the gear 512, and the pawl 522 away from the pushing assembly 4 limits the forward rotation, i.e. clockwise rotation, of the ratchet wheel 513 away from the gear 512.

[0047] In other schemes, the pushing assembly 4 comprises a pushing cylinder 41 and a rack 42; the pushing cylinder 41 is slidably connected to the connecting cylinder 2, and the descent of the pushing cylinder 41 can press the inclined surface of the sliding rod 31 to make the sliding rod 31 slide to the center; the rack 42 is fixed to the pushing cylinder 41 and is engaged with the gear 512. It should be understood that the rack 42 is always engaged with the gear 512.

[0048] In other schemes, the driving member 6 and the first connecting rope 61 are further provided; the driving member 6 is slidably connected to the connecting cylinder 2 and is connected to the pawl 522 that limits the reverse rotation of the ratchet wheel 513 through the first connecting rope 61, the descent of the driving member 6 can drive the pawl 522 to move away from the corresponding ratchet wheel 513, and then push the pushing cylinder 41 to slide downward.

[0049] It should be understood that the reverse rotation of the limiting ratchet 513 limits the descent of the rack 42, and the forward rotation of the limiting ratchet 513 limits the ascent of the rack 42. In the initial state, the two pawls 522 abut against the corresponding limiting ratchet 513 through the torsion spring 523, so that the gear 512 cannot rotate, i.e., the rack 42 cannot ascend or descend. When it is necessary to slide the side blocking assembly 3, the driving member 6 is slid downward, so that the first connecting rope 61 drives the pawl 522 that limits the reverse rotation of the limiting ratchet 513 to move away from the limiting ratchet 513. In this process, the driving member 6 does not contact the push cylinder 41. After the pawl 522 moves away from the corresponding limiting ratchet 513, the continuous downward sliding of the driving member 6 can drive the push cylinder 41 to slide downward. After the push cylinder 41 presses the sliding rod 31, the sliding rod 31 gives the push cylinder 41 an upward counterforce under the action of the elastic rope 33 itself, and continues to give the limiting ratchet 513 a tendency to rotate forward. However, the pawl 522 that moves away from the push member limits the forward rotation of the limiting ratchet 513, so as to preliminarily fix the height position of the push cylinder 41. Subsequently, the driving member 6 is loosened, so that the pawl 522 connected with the first connecting rope 61 is reset, thereby limiting the forward rotation and reverse rotation of the gear 512, and further fixing the height position of the push cylinder 41. Through the structure, the position can be automatically limited after sliding to the required position, and an additional positioning operation is saved. Preferably, the driving member 6 is a ring-shaped plate into which the fingers of an operator can be inserted. In the initial state, the driving member 6 moves away from the push cylinder 41 under the action of the torsion spring 523.

[0050] In other schemes, a second connecting rope 7 is further provided, and a connecting ring 101 is further provided on the torque wrench 10. One end of the second connecting rope 7 is connected with the pawl 522 that limits the forward rotation of the limiting ratchet 513, and the other end of the second connecting rope 7 is tied on the connecting ring 101. Through the structure, after the torque wrench 10 completes the tightening operation, the second connecting rope 7 can be pulled to make the side blocking assembly 3 slide outward under the action of the elastic force of the side blocking assembly 3 itself, so that the sleeve is farther away from the waterproof and breathable valve, which is more convenient.

[0051] The waterproof and breathable valve tightening device described above can save more materials and further reduce costs under the premise of ensuring the strength of the waterproof and breathable valve.

[0052] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it. It cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A waterproof and breathable valve tightening device comprising a torque wrench, characterized in that: The coaxial sleeve upper section, sleeve middle section and sleeve lower section are further included; The top of the sleeve middle section and the bottom of the sleeve upper section are fixedly connected by welding, the inner diameter and the outer diameter of the sleeve middle section and the sleeve upper section are the same, the top of the sleeve upper section is provided with a connecting hole, and the torsion wrench can be connected through the connecting hole; The bottom of the sleeve middle section and the top of the sleeve lower section are fixedly connected by welding, the outer diameter of the sleeve middle section and the sleeve lower section is the same, the center of the sleeve lower section is provided with a polygonal hole matched with the waterproof air leakage valve, and the radius of the circumscribed circle of the polygonal hole is smaller than the inner diameter of the sleeve middle section.

2. A waterproof and breathable valve tightening device according to claim 1, characterized in that: The connecting cylinder, side stop component, pushing component and limiting mechanism are further included; the connecting cylinder is detachably arranged on the sleeve middle section, the side stop component is provided with a plurality of side stop components and is slidably arranged at the bottom of the connecting cylinder; the pushing component is slidably connected to the connecting cylinder, and the descent of the pushing component can simultaneously make each side stop component slide to the center of the sleeve lower section; the limiting mechanism is arranged on the connecting cylinder and can limit the position of the pushing component.

3. A waterproof and breathable valve tightening device according to claim 2, characterized in that: The side stop component includes a sliding rod, a side stop plate and an elastic rope; the sliding rod is slidably connected to the bottom of the connecting cylinder, one end of the sliding rod away from the polygonal hole is provided with an inclined surface, the descent of the pushing component can extrude the inclined surface and make the sliding rod slide to the center of the sleeve lower section; one end of the sliding rod close to the polygonal hole is provided with the side stop plate, and the sliding rod is connected to the connecting cylinder through the elastic rope.

4. A waterproof and breathable valve tightening device according to claim 3, characterized in that: The limiting mechanism includes a rotating component and a limiting component; the rotating component and the limiting component are respectively rotatably connected to the connecting cylinder, the lifting of the pushing component can drive the rotating component to rotate, and the limiting component is provided with two limiting components and respectively limits the forward rotation and the reverse rotation of the rotating component.

5. A waterproof, breathable valve tightening device according to claim 4, wherein: The rotating component includes a driven shaft, a gear and a ratchet wheel; the driven shaft is rotatably connected to the connecting cylinder, the gear and the ratchet wheel are coaxially and fixedly arranged on the driven shaft, and the lifting of the pushing component can drive the gear to rotate; the ratchet wheel is provided with two groups, the rotation directions of the teeth of the two ratchet wheels are opposite, the limiting component and the ratchet wheel are one-to-one corresponding, and the limiting component can limit the rotation of the ratchet wheel in one direction.

6. A waterproof, breathable valve tightening device according to claim 5, wherein: The limiting component includes a limiting shaft, a pawl and a torsional spring; the limiting shaft is arranged on the connecting cylinder, the pawl is rotatably arranged on the limiting shaft and connected to the connecting cylinder through the torsional spring, and the pawl can limit the one-way rotation of the ratchet wheel.

7. A waterproof, breathable valve tightening device according to claim 6, wherein: The pushing component includes a pushing cylinder and a rack; the pushing cylinder is slidably connected to the connecting cylinder, the descent of the pushing cylinder can extrude the inclined surface of the sliding rod and make the sliding rod slide to the center; the rack is fixedly arranged on the pushing cylinder and engaged with the gear.

8. A waterproof, breathable valve tightening device according to claim 7, wherein: The driving member and the first connecting rope are further arranged; the driving member is slidably connected to the connecting cylinder and connected to the pawl limiting the reverse rotation of the ratchet wheel through the first connecting rope, the downward sliding of the driving member can drive the pawl to move away from the corresponding ratchet wheel, and then push the pushing cylinder to slide downward.

9. A waterproof, breathable valve tightening device according to claim 8, wherein: Second connecting rope is arranged, and a connecting ring is arranged on the torque wrench. One end of the second connecting rope is connected with the pawl limiting the forward rotation of the ratchet, and the other end is tied on the connecting ring.

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