Tightening device for waterproof ventilation valve

Abstract

The invention 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 invention belongs to the technical field of gearbox assembly, and in particular relates to a waterproof and breathable valve tightening device. Background Art

[0002] During the assembly of the gearbox assembly, the waterproof breathable valve has a large opposite side distance but a thin thickness, and the parts have strict requirements on the allowable tightening torque. Using a wrench to tighten it can easily cause serious wear and scratches on the hexagonal tightening edge and damage to parts, and it cannot be torqued to meet the requirements, resulting in the risk of loosening later.

[0003] For this reason, the waterproof breathable valve is mostly installed by a torque wrench and a corresponding sleeve. The bottom of the sleeve is a polygonal groove corresponding to the waterproof breathable valve. In the existing sleeve production, solid rod materials are mostly milled. In order to ensure the contact strength between the waterproof breathable valve and the sleeve, sufficient margin is required next to the polygonal groove. The overall processing will inevitably make the wall thickness of the side wall thicker. Thickening while meeting the strength requirement of the side wall will undoubtedly cause unnecessary material waste and increase the cost. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a waterproof breathable valve tightening device to solve the technical problem mentioned in the above background technology that in order to strengthen the connection strength between the sleeve and the waterproof breathable valve, the side wall of the sleeve is thickened, resulting in increased costs.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0006] A waterproof and breathable valve tightening device comprises a torque wrench, and also comprises a coaxial sleeve upper section, a sleeve middle section and a sleeve lower section;

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

[0008] The bottom of the middle section of the sleeve and the top of the lower section of the sleeve are fixedly connected by welding. The outer diameters of the middle section of the sleeve and the lower section of the sleeve are the same. A polygonal hole adapted to the waterproof air leakage valve is provided at the center of the lower section of the sleeve. The radius of the circumscribed circle of the polygonal hole is smaller than the inner diameter of the middle section of the sleeve.

[0009] Furthermore, it also includes a connecting tube, a side stop assembly, a pushing assembly and a limiting mechanism; the connecting tube is detachably arranged on the middle section of the sleeve, and the side stop assemblies are provided in multiple numbers and are slidably arranged on the bottom of the connecting tube; the pushing assembly is slidably connected to the connecting tube in a lifting manner, and the descent of the pushing assembly can simultaneously cause each of the side stop assemblies to slide toward the center of the lower section of the sleeve; the limiting mechanism is arranged on the connecting tube and can limit the position of the pushing assembly. Through this structure, waterproof and breathable valves of different sizes can be applied, and the applicability is wider.

[0010] Furthermore, the side baffle assembly includes a sliding rod, a side baffle plate and an elastic rope; the sliding rod is slidably connected to the bottom of the connecting tube, and an inclined surface is provided at one end of the sliding rod away from the polygonal hole. The descent of the pushing assembly can squeeze the inclined surface and make the sliding rod slide toward the center of the lower section of the sleeve; the side baffle plate is provided at one end of the sliding rod close to the polygonal hole, and the sliding rod is connected to the connecting tube via the elastic rope.

[0011] Furthermore, 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 and lowering of the pushing component can drive the rotating component to rotate, and the limiting component is provided with two groups, which respectively limit the forward and reverse rotation of the rotating component.

[0012] Furthermore, 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 coaxially fixed on the driven shaft, and the lifting and lowering of the pushing assembly can drive the gear to rotate; the ratchet is provided with two groups, the ratchet teeth of the two ratchet wheels have opposite rotation directions, the limiting assembly corresponds to the ratchet one-to-one, and can limit the rotation of the ratchet in one direction.

[0013] Furthermore, the limiting assembly includes a limiting coupling, a pawl and a torsion spring; the limiting coupling is arranged on the connecting cylinder, the pawl is rotatably arranged on the limiting coupling and is connected to the connecting cylinder through the torsion 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 in a lifting manner, and the descent of the pushing cylinder can squeeze the inclined surface of the sliding rod to make the sliding rod slide toward the center; the rack is fixed on the pushing cylinder and meshes with the gear. It should be understood that the rack is always meshed with the gear.

[0015] Furthermore, a driving member and a first connecting rope are provided; the driving member is slidably connected to the connecting tube in a liftable manner, and is connected to a pawl that limits the reversal of the ratchet through the first connecting rope. The downward movement of the driving member can drive the pawl to leave the corresponding ratchet, and then push the pushing tube to slide down.

[0016] Furthermore, a second connecting rope is provided, and a connecting ring is provided on the torque wrench; one end of the second connecting rope is connected to the ratchet that limits the forward rotation of the ratchet wheel, and the other end is tied to the connecting ring. With this structure, after the torque wrench completes the tightening operation, the second connecting rope can be pulled to make the side stop assembly slide outward under the action of its own elastic force, making it more convenient to keep the sleeve away from the waterproof breathable valve.

[0017] Compared with the prior art, the advantages of the present invention include:

[0018] In the present 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 set to be smaller than the inner diameter of the middle section of the sleeve, so that after the three parts of the sleeve are assembled, there is enough lower section of the sleeve between the side of the polygonal hole and the middle section of the sleeve for connection support, thereby ensuring the strength of the connection part with the waterproof breathable valve. At the same time, since they are 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, thereby reducing the overall material cost. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic diagram of assembling an upper sleeve section, a middle sleeve section and a lower sleeve section of a waterproof breathable valve tightening device in the present invention;

[0021] Figure 2 for Figure 1 The schematic cross-sectional view of the upper sleeve section, the middle sleeve section and the lower sleeve section shown;

[0022] Figure 3 It is a schematic diagram of the waterproof breathable valve tightening device of the present invention;

[0023] Figure 4 for Figure 3 A cross-sectional schematic diagram of a waterproof and breathable valve tightening device shown;

[0024] Figure 5 for Figure 3An enlarged schematic diagram of part A is shown.

[0025] Reference numerals:

[0026] Torque wrench 10, connecting ring 101, upper section of sleeve 11, connecting hole 111, middle section of sleeve 12, lower section of sleeve 13, polygonal hole 131, connecting tube 2, side block assembly 3, sliding rod 31, side block plate 32, elastic rope 33, pushing assembly 4, pushing tube 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, torsion 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 inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0028] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, 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", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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, when positional terms such as both sides, outside, up and down are used, it should be understood that they are only used to facilitate understanding and description, considering that the structure may be facing other positions.

[0031] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The embodiments of the present invention are intended to introduce and illustrate the structural composition of the waterproof and breathable valve tightening device and the matching relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components in the waterproof and breathable valve tightening device in the embodiments of the present invention can be selected according to specific circumstances and are not specifically limited or described herein.

[0033] Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. For those skilled in the art, the present invention can be fully understood without the description of these details.

[0034] Please also read Figure 1-Figure 5 , this embodiment provides a waterproof breathable valve tightening device, including a torque wrench 10, and also includes a coaxial sleeve upper section 11, a sleeve middle section 12 and a sleeve lower section 13;

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

[0036] The bottom of the sleeve middle section 12 and the top of the sleeve lower section 13 are fixedly connected by welding. The outer diameters of the sleeve middle section 12 and the sleeve lower section 13 are the same. A polygonal hole 131 adapted to the waterproof air leakage valve is provided at the center of the sleeve lower section 13. The radius of the circumscribed circle of the polygonal hole 131 is smaller than the inner diameter of the sleeve middle section 12.

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

[0038] In the present 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 set to be smaller than the inner diameter of the middle section 12 of the sleeve, so that after the three parts of the sleeve are assembled, there is enough sleeve lower section 13 between the side of the polygonal hole 131 and the middle section 12 of the sleeve for connection and support, thereby ensuring the strength of the connection part with the waterproof breathable valve. At the same time, since they are 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, thereby reducing the overall material cost.

[0039] Waterproof breathable valves have different sizes according to different usage scenarios. Conventional sleeves can only correspond to one size of waterproof breathable valves. The same sleeve is difficult to cope with different waterproof breathable valves. To solve this problem, other solutions also include a connecting tube 2, a side stop assembly 3, a pushing assembly 4 and a limiting mechanism 5; the connecting tube 2 is detachably arranged on the sleeve middle section 12, and a plurality of side stop assemblies 3 are provided and slidably arranged on the bottom of the connecting tube 2; specifically, the connecting tube 2 and the sleeve middle section 12 are coaxial, and the connecting tube 2 includes a riser and a bottom support ring that fits the sleeve middle section 12, and the side stop assembly 3 is arranged on the bottom support ring, and the bottom support ring is preferably in contact with the bottom of the sleeve lower section 13, and the inner ring radius is greater than the circumscribed circle of the polygonal hole 131. The side stop assembly 3 corresponds to each side of the polygonal hole 131 one by one, and slides along the radial direction of the sleeve lower section 13. The pushing assembly 4 is slidably connected to the connecting tube 2 in a liftable manner. The descent of the pushing assembly 4 can simultaneously cause each side stop assembly 3 to slide toward the center of the lower sleeve section 13 . The limiting mechanism 5 is arranged on the connecting tube 2 and can limit the position of the pushing assembly 4 .

[0040] In this embodiment, through holes of the same size are provided on the connecting tube 2 and the sleeve middle section 12, and the connecting tube 2 is installed and removed by passing a limit rod of the same size as the through hole through the through holes of the connecting tube 2 and the sleeve middle section 12 at the same time. It should be understood that different heights of the push assembly 4 correspond to different positions of the side stop assembly 3, and by changing the position of each side stop assembly 3, the size of the polygon surrounded by each side stop assembly 3 is changed, so that the size of the polygon is adapted to different waterproof breathable valves, thereby adapting to waterproof breathable valves of different sizes.

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

[0042] In other embodiments, the side baffle assembly 3 includes a sliding rod 31, a side baffle plate 32 and an elastic rope 33; the sliding rod 31 is slidably connected to the bottom of the connecting tube 2, and an inclined surface is provided at one end of the sliding rod 31 away from the polygonal hole 131, and the descent of the push assembly 4 can squeeze the inclined surface and make the sliding rod 31 slide toward the center of the lower section 13 of the sleeve; a side baffle plate 32 is provided at one end of the sliding rod 31 close to the polygonal hole 131, and the sliding rod 31 is connected to the connecting tube 2 through an elastic rope 33. Specifically, the elastic rope 33 is provided on the inner side surface of the bottom of the connecting tube 2. It should be understood that the elastic rope 33 is in a stretched state after sliding, giving the sliding rod 31 an outward force, which is offset by the connecting tube 2, so that the position of the sliding rod 31 is fixed. At the same time, when the position is fixed, each side baffle plate 32 abuts against the waterproof 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 tube 2, and the lifting and lowering of the pushing assembly 4 can drive the rotating assembly 51 to rotate, and vice versa, the rotation of the rotating assembly 51 can drive the pushing assembly 4 to lift and lower, and when the rotating assembly 51 cannot rotate, the pushing assembly 4 cannot lift and lower. The limiting assembly 52 is provided with two groups, and respectively limits the forward and reverse rotation of the rotating assembly 51.

[0044] It should be understood that the forward and reverse rotations of the rotating assembly 51 correspond to the lifting and lowering of the pushing assembly 4. Specifically, in this embodiment, the forward rotation of the rotating assembly 51 causes the pushing assembly 4 to lift, and the reverse rotation of the rotating assembly 51 causes the pushing assembly 4 to fall. When in use, the corresponding limiting assembly 52 is moved away from the rotating assembly 51 in advance to make the pushing assembly 4 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 includes a driven rotating shaft 511, a gear 512 and a ratchet 513; the driven rotating shaft 511 is rotatably connected to the connecting cylinder 2, the gear 512 and the ratchet 513 are respectively coaxially fixed on the driven rotating shaft 511, and the lifting and lowering of the pushing assembly 4 can drive the gear 512 to rotate; there are two groups of ratchet wheels 513, and the ratchet teeth of the two ratchet wheels 513 rotate in opposite directions. The limiting assembly 52 and the ratchet wheels 513 correspond one to one and can limit the rotation of the ratchet wheels 513 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. When the gear 512 stops rotating, the pushing assembly 4 cannot be lifted or lowered.

[0046] In other embodiments, the limiting assembly 52 includes a limiting coupling 521, a ratchet 522 and a torsion spring 523; the limiting coupling 521 is disposed on the connecting cylinder 2, the ratchet 522 is rotatably disposed on the limiting coupling 521, and is connected to the connecting cylinder 2 via the torsion spring 523, and the ratchet 522 can limit the unidirectional rotation of the ratchet 513. Specifically, the ratchet 522 of different limiting assemblies 52 limit the unidirectional rotation of different ratchet wheels 513. Specifically, in this embodiment, the ratchet 522 close to the pushing assembly 4 limits the ratchet 513 close to the gear 512 to reverse, that is, to rotate counterclockwise, and the ratchet 522 far from the pushing assembly 4 limits the ratchet 513 far from the gear 512 to rotate forward, that is, to rotate clockwise.

[0047] In other embodiments, the pushing assembly 4 includes a pushing cylinder 41 and a rack 42; the pushing cylinder 41 is slidably connected to the connecting cylinder 2 in a liftable manner, and the descent of the pushing cylinder 41 can squeeze the inclined surface of the sliding rod 31, so that the sliding rod 31 slides toward the center; the rack 42 is fixed on the pushing cylinder 41 and meshes with the gear 512. It should be understood that the rack 42 is always meshed with the gear 512.

[0048] In other schemes, a driving member 6 and a first connecting rope 61 are also provided; the driving member 6 is slidably connected to the connecting tube 2 and is connected to the pawl 522 that limits the reversal of the ratchet 513 through the first connecting rope 61. The downward movement of the driving member 6 can drive the pawl 522 to leave the corresponding ratchet 513, and then push the pushing tube 41 to slide down.

[0049] It should be understood that limiting the reverse rotation of the ratchet 513 means limiting the rack 42 from descending, and limiting the forward rotation of the ratchet 513 means limiting the rack 42 from ascending. In the initial state, the two pawls 522 abut against their corresponding ratchet 513 through the torsion spring 523, so that the gear 512 cannot rotate, that is, the rack 42 cannot rise or fall. When it is necessary to slide each side block 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 ratchet 513 away from the ratchet 513. During this process, the driving member 6 does not contact the pushing cylinder 41. After the pawl 522 is away from the corresponding ratchet 513, the driving member 6 continues to slide downward to drive the pushing cylinder 41 to slide downward. After the pushing cylinder 41 squeezes the sliding rod 31, , the sliding rod 31 gives the push cylinder 41 an upward reverse force under the action of its own elastic rope 33, and continues to give the ratchet 513 a tendency to rotate forward, while the pawl 522 away from the push member limits the forward rotation of the ratchet 513, so the height position of the push cylinder 41 can be initially fixed, and then the driving member 6 is released to reset the pawl 522 connected to the first connecting rope 61, thereby limiting the forward and reverse rotation of the gear 512, and then fixing the height position of the push cylinder 41. Through this structure, it can be automatically limited after sliding to the required position, eliminating additional positioning operations. Preferably, the driving member 6 is an annular plate that allows the operator's finger to be inserted into it, and in the initial state, it is away from the push cylinder 41 by the force of the torsion spring 523.

[0050] In other solutions, 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 to a ratchet 522 that limits the forward rotation of the ratchet wheel 513, and the other end is tied to the connecting ring 101. With this structure, after the torque wrench 10 completes the tightening operation, the second connecting rope 7 can be pulled to make the side stop assembly 3 slide outward under the action of its own elastic force, so that the sleeve is more convenient to be away from the waterproof breathable valve.

[0051] The above-mentioned waterproof breathable valve tightening device can save more materials while ensuring the strength of the waterproof breathable valve, thereby reducing costs.

[0052] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

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

2. A waterproof breathable valve tightening device according to claim 1, characterized in that: It also includes a connecting tube, a side stop assembly, a pushing assembly and a limiting mechanism; the connecting tube is detachably arranged on the middle section of the sleeve, and a plurality of side stop assemblies are provided and are slidably arranged on the bottom of the connecting tube; the pushing assembly is slidably connected to the connecting tube in a liftable manner, and the descent of the pushing assembly can simultaneously cause each of the side stop assemblies to slide toward the center of the lower section of the sleeve; the limiting mechanism is arranged on the connecting tube and can limit the position of the pushing assembly.

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

4. A waterproof 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 and lowering of the pushing component can drive the rotating component to rotate, and the limiting component is provided with two groups, which respectively limit the forward and reverse rotation of the rotating component.

5. A waterproof breathable valve tightening device according to claim 4, characterized in that: 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 coaxially fixed on the driven shaft, and the lifting and lowering of the pushing assembly can drive the gear to rotate; the ratchet is provided with two groups, and the ratchet teeth of the two ratchet wheels have opposite rotation directions. The limiting assembly corresponds to the ratchet one-to-one and can limit the rotation of the ratchet in one direction.

6. A waterproof breathable valve tightening device according to claim 5, characterized in that: The limiting assembly includes a limiting coupling, a pawl and a torsion spring; the limiting coupling is arranged on the connecting cylinder, the pawl is rotatably arranged on the limiting coupling and is connected to the connecting cylinder through the torsion spring, and the pawl can limit the one-way rotation of the ratchet.

7. A waterproof breathable valve tightening device according to claim 6, characterized in that: The pushing assembly includes a pushing cylinder and a rack; the pushing cylinder is slidably connected to the connecting cylinder in a liftable manner, and the descent of the pushing cylinder can squeeze the inclined surface of the sliding rod to make the sliding rod slide toward the center; the rack is fixed on the pushing cylinder and meshes with the gear.

8. A waterproof breathable valve tightening device according to claim 6, characterized in that: A driving member and a first connecting rope are also provided; the driving member is slidably connected to the connecting cylinder in a liftable manner, and is connected to a pawl that limits the reversal of the ratchet through the first connecting rope. The downward movement of the driving member can drive the pawl to leave the corresponding ratchet, and then push the pushing cylinder to slide down.

9. A waterproof breathable valve tightening device according to claim 8, characterized in that: A second connecting rope is also provided, and a connecting ring is also provided on the torque wrench; one end of the second connecting rope is connected to the ratchet pawl for limiting the forward rotation of the ratchet wheel, and the other end is tied to the connecting ring.

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