CN211398506U - Ventilating cap - Google Patents

Abstract

The application discloses ventilative cap relates to the technical field of speed reducer to solve the technical problem that the oil mist among the prior art is direct to arrange to the outside box through ventilative cap. The ventilating cap comprises a cap body and an impeller device, wherein the cap body is provided with an inner cavity, and an air inlet and an air outlet which are communicated with the inner cavity are formed in the cap body; the impeller device is arranged in the inner cavity and comprises a plurality of blades and a fixing piece, and the plurality of blades can be rotatably arranged on the cap body through the fixing piece; wherein, the blade surface of blade is for setting up towards the air inlet. So this application is applied to the speed reducer, through addding impeller device in ventilative cap for oil mist can condense in the blade surface of blade under impeller device's effect when passing through ventilative cap, and the fluid that the condensation formed is got rid of to the inner wall of inner chamber by the blade on, and can flow back to the box of speed reducer in, thereby reduce fluid and ooze or oil mist escape phenomenon, reduce and cause the pollution to equipment and air circumstance.

Description

Ventilating cap

Technical Field

The application relates to the technical field of speed reducers, in particular to a breathable cap.

Background

The box body is often required to be connected with a ventilation cap on the speed reducer, so that the box body keeps the internal gas and the external gas communicated with each other, and the internal gas pressure is prevented from being too high.

However, in the actual operation process, the ventilation cap passes through not only air but also oil mist such as oil-gas mixture, and in the prior art, the ventilation cap can cause the oil mist to be directly discharged to the air outside the box body through the ventilation cap, so that the environment is polluted.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a ventilative cap to solve the technical problem that the oil mist among the prior art is direct to be arranged to the outside of the box through ventilative cap.

The above technical problem of the present application is mainly solved by the following technical solutions:

a ventilation cap comprises a cap body and an impeller device, wherein the cap body is provided with an inner cavity, and an air inlet and an air outlet which are communicated with the inner cavity are formed in the cap body; the impeller device is arranged in the inner cavity and comprises a plurality of blades and a fixing piece, and the plurality of blades are rotatably arranged on the cap body through the fixing piece; wherein, the blade surface of blade is for facing the air inlet sets up.

In one embodiment, the fixing member includes a fixing rod and a pipe sleeve, and the pipe sleeve is sleeved on the fixing rod; the blades are arranged on the pipe sleeve and distributed in a circumferential array around the axis of the fixing rod, and the fixing rod is connected to the cap body.

In one embodiment, the fixing member includes a fixing rod, a pipe sleeve and a mounting seat, wherein the pipe sleeve is sleeved on the fixing rod; the mounting seat is arranged on the inner wall of the inner cavity, the mounting seat is provided with a fixing hole matched with the fixing rod, the blades are arranged on the pipe sleeve and wound around the axis of the fixing rod to form a circumferential array distribution, the mounting seat is of a rod-shaped structure, and the inner wall of the inner cavity is provided with a mounting hole matched with the mounting seat.

In one embodiment, the fixing member includes a fixing rod, a pipe sleeve and a mounting seat, wherein the pipe sleeve is sleeved on the fixing rod; the mounting seat is arranged on the inner wall of the inner cavity, and a fixing hole matched with the fixing rod is formed in the mounting seat; the mounting seat is of a disc-shaped structure; be equipped with a plurality of bleeder vents on the mount pad, the axis of fixed orifices the axis of bleeder vent all with the axis of air inlet becomes syntropy and sets up, and is a plurality of the blade is located on the pipe box, and winds the axis of fixed rod becomes circumference array distribution, be equipped with on the inner wall of inner chamber with the mounting groove that the mount pad matches, the mounting groove is for encircleing the inner wall a week of inner chamber sets up.

In one embodiment, the fixing member includes a first shaft sleeve and a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are both sleeved on the fixing rod and are respectively located at two sides of the pipe sleeve; one end of the fixed rod is used for being connected with the fixed hole, and the other end of the fixed rod is connected with a limiting block which is used for being abutted to the first shaft sleeve or the second shaft sleeve.

In one embodiment, the cap body includes a cap base and a cap cover connected to the cap base, the blade is disposed in the cap base, and the fixing member is connected to the cap cover or the cap base.

In one embodiment, the cap base includes a middle tube and a bottom tube, one end of the middle tube is connected to the cap, and the other end of the middle tube is connected to the bottom tube, wherein the air inlet is an opening at one end of the bottom tube, which is far away from the middle tube.

In an embodiment, the bottom tube body includes a first tube section, a first connecting ring piece and a second tube section, which are connected in sequence, and an inner hole aperture of the first tube section is larger than an inner hole aperture of the second tube section, wherein the first tube section is used for being connected with the middle tube body, the blade is arranged in the inner hole of the first tube section, and the fixing member is arranged on an inner wall of the second tube section.

In an embodiment, the intermediate pipe body includes a third pipe section, a second connection ring piece, a fourth pipe section, a third connection ring piece and a fifth pipe section, which are connected in sequence, and the inner hole apertures of the third pipe section and the fifth pipe section are all larger than the inner hole aperture of the fourth pipe section, wherein the third pipe section is used for being connected with the cap, the fifth pipe section is used for being connected with the bottom pipe body, the plurality of air outlets are arranged and are all arranged on the second connection ring piece, and the third connection ring piece, the fifth pipe section, the first pipe section and the first connection ring piece surround the blade to form a space for the blade to rotate.

In one embodiment, the vanes are disposed at an angle relative to the axis of the inlet.

Compared with the prior art, the beneficial effect of this application is: this application is applied to the speed reducer, through addding impeller device in ventilative cap for oil mist can be under impeller device's effect when passing through ventilative cap, congeals in on the blade surface of blade, and the fluid that the condensation formed is got rid of to the inner wall of inner chamber by the blade on, and can flow back to the box of speed reducer in, thereby reduce fluid and ooze or oil mist escape phenomenon, reduce and cause the pollution to equipment and air circumstance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a speed reducer according to an embodiment of the present application;

FIG. 2 is a schematic structural view of an embodiment of the present application showing an air permeable cap;

FIG. 3 is a cross-sectional view of a vented cap shown in an embodiment of the present application;

FIG. 4 is an exploded view of an impeller device shown in an embodiment of the present application;

FIG. 5 is an exploded view of the cap body shown in one embodiment of the present application;

FIG. 6 is a cross-sectional view of a vented cap shown in an embodiment of the present application;

FIG. 7 is a cross-sectional view of a vented cap according to one embodiment of the present application.

Icon: 9-a speed reducer; 91-a box body; 92-a breathable cap; 1-a cap body; 11-a cap base; 111-an intermediate tube body; 1111-a third pipe section; 1112-a second connecting ring piece; 1113-a fourth tube section; 1114-a third connecting ring piece; 1115-a fifth pipe section; 1116-a notch; 112-bottom tube body; 1121 — a first tube segment; 1122-a first connecting ring segment; 1123 — a second tube segment; 1124-fastening flanges; 12-a cap; 121-connecting hole; 13-lumen; 131-a mounting groove; 132-mounting holes; 14-an air inlet; 15-air outlet; 2-an impeller device; 21-leaf blade; 22-a fixing member; 221-a fixing rod; 2211-stop block; 2212-stop flange; 222-a tube sleeve; 223-a mounting seat; 2231-fixing holes; 2232-air holes; 224-a first bushing; 225-second bushing; 31-a first thread; 32-a second thread; 33-third thread; 34-a fourth thread; 35-fifth thread; 36-sixth thread; 37-seventh thread; 38-eighth thread; 39-ninth thread; 41-a first axis; 42-second axis.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Please refer to fig. 1, which is a schematic structural diagram of a speed reducer 9 according to an embodiment of the present application. The speed reducer 9 comprises a box body 91, and a ventilation cap 92 is detachably connected to the box body 91.

Please refer to fig. 2, which is a schematic structural diagram of a ventilation cap 92 according to an embodiment of the present application. The breathable cap 92 includes a cap body 1, and the cap body 1 includes a cap base 11 and a cap cover 12. In an embodiment, the connection between the cap base 11 and the cap 12 may be a detachable connection such as a bolt connection, a snap connection, or the like. A first thread 31 for connecting with a box 91 (see fig. 1) is arranged at the bottom end of the cap 11; the first thread 31 is an external thread.

The axis of the cap body 1 is a first axis 41, and the first axis 41 may be used to indicate the up-down direction. The direction of the axis of the cap 11 towards the cap 12 is defined as upward.

Please refer to fig. 3, which is a sectional view of a venting cap 92 according to an embodiment of the present application. The gas permeable cap 92 comprises a cap body 1 and an impeller device 2. The cap body 1 is provided with an inner cavity 13, and the cap body 1 is provided with an air inlet 14 and an air outlet 15 which are communicated with the inner cavity 13. The impeller device 2 is arranged in the inner cavity 13, the impeller device 2 comprises a plurality of blades 21 and a fixing piece 22, and the plurality of blades 21 are rotatably arranged on the cap body 1 through the fixing piece 22. Wherein the blade surface of the blade 21 is disposed toward the intake port 14.

The axis of the air inlet 14 is a second axis 42, and the vanes 21 are disposed at an inclination with respect to the second axis 42. The surface of the blade 21 is a curved surface or a flat surface. In the embodiment, the second axis 42 coincides with the first axis 41, and in the embodiment, the second axis 42 does not coincide with the first axis 41, that is, the air inlet 14 may be an inclined hole.

In an operation process, when the speed reducer 9 works, the high-temperature gas inside the speed reducer 9 includes oil mist, i.e., oil-gas mixture, and forms a pressure difference with the external normal-temperature gas, and the high-temperature gas is driven by the pressure to flow outwards through the ventilation cap 92 at a high speed. The high-temperature gas includes oil mist such as air and oil-gas mixture.

In the flowing process of the high-temperature gas, the high-temperature gas enters from the air inlet 14 of the cap body 1, and after the high-temperature gas contacts the blades 21, firstly, because the blade surfaces of the blades 21, namely the heat dissipation surfaces, are larger, and the temperature of the blade surfaces is lower than that of oil mist, the oil mist in the high-temperature gas can be cooled and condensed on the blades 21; meanwhile, the flowing high-temperature gas can drive the blades 21 to rotate rapidly, so that oil liquid formed by condensation on the blade surfaces of the blades 21 is thrown onto the inner wall of the inner cavity 13 along the rotating tangential direction of the blades 21, and then flows back to the interior of the box body 91 of the speed reducer 9 along the inner wall of the inner cavity 13. Therefore, the oil mist in the high-temperature gas can be fully condensed at the blade 21 and then thrown out to flow back to the inside of the box body 91 through the two physical processes, the oil mist is prevented from seeping out of the ventilation cap 92, the oil mist is reduced from escaping from the air outlet 15, the pollution of the oil mist caused by the seepage to the equipment is avoided, and the pollution of the escaped oil mist to the air environment is avoided.

Because the high-temperature gas pushes the blades 21 to rotate in the flowing process of the high-temperature gas, the residence time of the oil mist in the inner cavity 13 can be increased, and the condensation rate of the oil mist is improved.

Wherein, the blade surface of blade 21 is the curved surface or the plane of slope to can increase the blade surface area of blade 21, improve the condensation rate of oil mist, and the blade surface sets up for the slope, makes the fluid dripping of condensing on the blade surface, thereby improves the backward flow rate of fluid.

Fig. 4 is an exploded view of the impeller device 2 according to an embodiment of the present application. The fixing member 22 includes a fixing rod 221, a socket 222, and a mount 223, and a plurality of blades 21 are fixed to the socket 222 and distributed in a circumferential array around the axis of the fixing rod 221. In one embodiment, the vane 21 and the sleeve 222 may be integrally formed. The tube 222 is sleeved on the fixing rod 221, and the tube 222 can rotate relative to the fixing rod 221 along with the rotation of the blade 21. The mount 223 is fixed on the inner wall of the inner cavity 13 so that the mount 223 does not rotate relative to the cap body 1 as the blade 21 rotates. The mounting seat 223 is provided with a fixing hole 2231 matched with the fixing rod 221, the fixing rod 221 is arranged in the fixing hole 2231 in a penetrating way and is connected and fixed, and the fixing rod 221 cannot rotate relative to the mounting seat 223 along with the rotation of the blade 21.

The fixing member 22 includes a first shaft sleeve 224 and a second shaft sleeve 225, the first shaft sleeve 224 and the second shaft sleeve 225 are both sleeved on the fixing rod 221 and respectively located at two sides of the pipe sleeve 222 for limiting displacement of the pipe sleeve 222 along the axial direction of the fixing rod 221; the length of the first bushing 224 is less than the length of the second bushing 225, and the first bushing 224 is located above the second bushing 225.

The mounting seat 223 is located below the blade 21, the bottom end of the fixing rod 221 is used for connecting with the fixing hole 2231, and the top end of the fixing rod 221 is connected with a limiting block 2211 for abutting against the first shaft sleeve 224. Wherein the axis of the fixing rod 221 may coincide with the second axis 42.

The mounting seat 223 has a disk-shaped structure, and a plurality of air holes 2232 are formed in the mounting seat 223 to prevent the air flow from being obstructed in the inner cavity 13.

To facilitate the air flow, the axes of the fixing holes 2231 and the air holes 2232 are both disposed in the same direction as the second axis 42 (see fig. 3). That is, the air holes 2232 are through holes formed in the mounting seat 223 along the thickness direction, and the fixing holes 2231 may be blind holes or through holes formed in the mounting seat 223 along the thickness direction. The thickness direction of the mount 223 is arranged in the same direction as the second axis 42.

To facilitate airflow, the plurality of air holes 2232 are smooth holes, and the plurality of air holes 2232 are circumferentially distributed around the first axis 41 and are located on the outer ring of the fixing hole 2231.

The fixing hole 2231 is provided at an inner surface thereof with a second screw thread 32. The bottom end of the fixing rod 221 is provided with a third screw thread 33 matching the second screw thread 32. The fixing rod 221 is fixed to the fixing hole 2231 by a screw. The outer wall of the mounting seat 223 is provided with a fourth thread 34 for mounting. The mount 223 is fixed on the inner wall of the inner cavity 13 by the fourth screw 34 so that the mount 223 does not rotate relative to the cap body 1 as the blade 21 rotates.

In an operation process, in the flowing process of the oil mist, the oil mist enters from the air inlet 14 of the cap body 1 and reaches the blade surfaces of the blades 21 through the air holes 2232 on the mounting seat 223, the oil mist is condensed on the blade surfaces of the blades 21, the oil liquid formed by condensation is thrown to the inner wall of the inner cavity 13 by the blades 21 and can flow back to the box body 91 of the speed reducer 9, and the oil content of the air flow discharged to the outside of the box body 91 through the air outlet 15 is reduced.

In an embodiment, the fixing rod 221 is a bolt, the stopper 2211 is a bolt head, and the first shaft sleeve 224, the second shaft sleeve 225 and the pipe sleeve 222 are all sleeved on an optical axis portion of a screw of the bolt. The blades 21 are made of cast aluminum, the first and second bushings 224, 225 are made of nylon material, and the mount 223 is made of carbon structural steel (Q235).

In an embodiment, the pipe sleeve 222 and the fixing rod 221 are fixed by a connection method such as a screw thread, so that the pipe sleeve 222 cannot rotate relative to the fixing rod 221 along with the rotation of the blade 21, and the fixing rod 221 is inserted into the fixing hole 2231 and can be connected by a connection method such as a bearing, so that the fixing rod 221 can rotate relative to the mounting seat 223 along with the rotation of the blade 21.

In one embodiment, the first bushing 224 is located below the second bushing 225.

In one embodiment, the mount 223 is located above the blade 21.

Please refer to fig. 5, which is an exploded view of the cap body 1 according to an embodiment of the present application. The cap 11 (see fig. 2) includes a middle tube 111 and a bottom tube 112, one end of the middle tube 111 is connected to the cap 12, and the other end is connected to the bottom tube 112, wherein the air inlet 14 is an opening on the bottom tube 112 away from one end of the middle tube 111. An eighth thread 38 is arranged on the inner wall of the cap 12, and the eighth thread 38 is an internal thread.

The bottom tube 112 includes a first tube segment 1121, a first connecting ring 1122 and a second tube segment 1123 connected in sequence from top to bottom, and the inner hole diameter of the first tube segment 1121 is greater than the inner hole diameter of the second tube segment 1123, wherein the first tube segment 1121 is provided with a sixth thread 36, the sixth thread 36 is an external thread and is used for being connected with the middle tube 111, and the first thread 31 is provided at the bottom end of the second tube segment 1123 and is used for being connected with the box 91 (please refer to fig. 1). And first tube segment 1121, first connecting ring 1122, and second tube segment 1123 may be integrally formed or may be welded together.

The vane 21 is rotatably disposed in the inner hole of the first pipe segment 1121 around its axis, and the fixing member 22 is disposed on the inner wall of the second pipe segment 1123, that is, a mounting groove 131 matched with the mounting seat 223 is disposed on the inner wall of the second pipe segment 1123, and the mounting groove 131 is a circular groove disposed around the inner wall of the inner cavity 13. The inner wall of the mounting groove 131 is provided with a fifth screw 35 matching with the fourth screw 34 (see fig. 4).

A fastening flange 1124 is provided on an outer wall of the second pipe section 1123, the fastening flange 1124 being in the shape of a bolt head for screwing the cap body 1 when the cap body 1 is fixed to the case 91. The fastening flange 1124 may be in the shape of a hexagonal prism or a quadrangular prism, etc.

The middle tube body 111 comprises a third tube section 1111, a second connecting ring piece 1112, a fourth tube section 1113, a third connecting ring piece 1114 and a fifth tube section 1115 which are sequentially connected from top to bottom, the inner hole diameters of the third tube section 1111 and the fifth tube section 1115 are all larger than the inner hole diameter of the fourth tube section 1113, wherein the third tube section 1111 is provided with a ninth thread 39 matched with an eighth thread 38 and used for being connected with the cap 12, and the fifth tube section 1115 is provided with a seventh thread 37 matched with a sixth thread 36 and used for being connected with the bottom tube body 112. Third tube segment 1111, second coupling ring segment 1112, fourth tube segment 1113, third coupling ring segment 1114, and fifth tube segment 1115 may be integrally formed or may be welded together. In one embodiment, the inner bore diameter of third tube section 1111 is smaller than the inner bore diameter of fifth tube section 1115.

The outer walls of second coupling ring segment 1112, fourth segment 1113, and third coupling ring segment 1114 define an annular notch 1116. The plurality of air outlets 15 are all disposed on the second connecting ring 1112, if the oil mist overflows from the air outlet 15, the oil mist will encounter the inner wall of the notch 1116 first, and a part of the oil mist can be condensed first, and the oil liquid formed by condensation will also stay on the inner wall of the notch 1116, and will not be directly discharged out of the box 91 (see fig. 1).

The third connecting ring piece 1114, the fifth pipe section 1115, the first pipe section 1121, and the first connecting ring piece 1122 surround the vane 21 to form a space for the vane 21 to rotate, so that when oil rotates along with the vane 21, the oil is thrown onto the inner wall of the third connecting ring piece 1114, the fifth pipe section 1115, the first pipe section 1121, or the first connecting ring piece 1122, and is not directly discharged from the air outlet 15.

The first pipe section 1121, the second pipe section 1123, the third pipe section 1111, the fourth pipe section 1113, and the fifth pipe section 1115 are circular pipes with central holes, and the first connecting ring piece 1122, the second connecting ring piece 1112, and the third connecting ring piece 1114 are circular ring-shaped ring pieces.

First tube segment 1121, first coupling ring 1122, second tube segment 1123, third tube segment 1111, second coupling ring 1112, fourth tube segment 1113, third coupling ring 1114, and fifth tube segment 1115 are all coaxially disposed about second axis 42 (see fig. 3). Inner cavity 13 (see fig. 3) refers to an inner region formed by first tube segment 1121, first connecting ring segment 1122, second tube segment 1123, third tube segment 1111, second connecting ring segment 1112, fourth tube segment 1113, third connecting ring segment 1114, fifth tube segment 1115, and cap 12.

Referring to fig. 6, a cross-sectional view of a venting cap 92 according to an embodiment of the present application is shown. The vanes 21 are provided in the cap 11, and the fixing member 22 is attached to the cap 11. The fixing member 22 includes a fixing rod 221, a pipe sleeve 222, a mounting seat 223, a first shaft sleeve 224 and a second shaft sleeve 225, the plurality of blades 21 are disposed on the pipe sleeve 222 and distributed in a circumferential array around an axis of the fixing rod 221, and the pipe sleeve 222 is disposed on the fixing rod 221 and can rotate around the fixing rod 221 along with the rotation of the blades 21; the mount 223 is fixed on the inner wall of the inner cavity 13 so that the mount 223 does not rotate relative to the cap body 1 as the blade 21 rotates. The mounting seat 223 is provided with a fixing hole 2231 matched with the fixing rod 221, and the fixing rod 221 is arranged in the fixing hole 2231 in a penetrating way and is connected and fixed to be incapable of rotating relative to the mounting seat 223 along with the rotation of the blade 21.

The mounting seat 223 is a rod-shaped structure, and the inner wall of the inner cavity 13 is provided with a mounting hole 132 matched with the mounting seat 223.

To facilitate ventilation, the mounting seat 223 is provided with ventilation holes 2232. In one embodiment, the mounting seat 223 is not provided with the air holes 2232.

The fixing rod 221 and the mounting seat 223 are connected, and the mounting seat 223 and the cap body 1 may be detachably connected by a screw, a bolt, or a snap connection.

Fig. 7 is a cross-sectional view of a ventilation cap 92 according to an embodiment of the present application. The blades 21 are provided in the cap 11 and the fixing member 22 is attached to the cap 12. The fixing member 22 includes a fixing rod 221 and a pipe sleeve 222, the plurality of blades 21 are disposed on the pipe sleeve 222 and distributed in a circumferential array around an axis of the fixing rod 221, and the pipe sleeve 222 is disposed on the fixing rod 221 and connected to fix the fixing rod 221 so that the pipe sleeve 222 cannot rotate relative to the fixing rod 221 with the rotation of the blades 21; the cap 12 is provided with a connecting hole 121, and a limit flange 2212 is provided on the top end of the fixing rod 221. The hole diameter of the connection hole 121 is larger than the outer diameter of the fixing lever 221 and smaller than the outer diameter of the stopper flange 2212, so that the fixing lever 221 can rotate relative to the cap 12 with the rotation of the blade 21.

In an operation process, the middle tube 111 is first screwed to the cap 12, the bottom end of the fixing rod 221 passes through the connecting hole 121, so that the limiting flange 2212 abuts against the cap 12, the tube sleeve 222 is then fixed to the bottom end of the fixing rod 221, the bottom tube 112 is then screwed to the middle tube 111, and finally the bottom tube 112 is screwed to the box 91 (see fig. 1).

In one embodiment, the fixing member 22 does not include the tube sleeve 222, and the blade 21 is directly fixed on the fixing rod 221. The blade 21 and the fixing rod 221 may be integrally formed.

In one embodiment, the fixing rod 221 is fixed on the cap 12 and cannot rotate relative to the cap 12 along with the rotation of the blade 21, and the tube 222 can be rotatably sleeved on the fixing rod 221.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A breathable cap, comprising:

the cap comprises a cap body and a cap body, wherein the cap body is provided with an inner cavity, and an air inlet and an air outlet which are communicated with the inner cavity; and

the impeller device is arranged in the inner cavity and comprises a plurality of blades and a fixing piece, and the plurality of blades are rotatably arranged on the cap body through the fixing piece;

wherein, the blade surface of blade is for facing the air inlet sets up.

2. The vented cap of claim 1, wherein the fixture comprises:

a fixing lever, and

the pipe sleeve is sleeved on the fixed rod;

the blades are arranged on the pipe sleeve and distributed in a circumferential array around the axis of the fixing rod, and the fixing rod is connected to the cap body.

3. The vented cap of claim 1, wherein the fixture comprises:

a fixing rod is fixed on the upper end of the supporting rod,

the pipe sleeve is sleeved on the fixed rod; and

the mounting seat is arranged on the inner wall of the inner cavity, a fixing hole matched with the fixing rod is arranged on the mounting seat,

the blades are arranged on the pipe sleeve and distributed in a circumferential array around the axis of the fixed rod, the mounting seat is of a rod-shaped structure, and mounting holes matched with the mounting seat are formed in the inner wall of the inner cavity.

4. The vented cap of claim 1, wherein the fixture comprises:

a fixing rod is fixed on the upper end of the supporting rod,

the pipe sleeve is sleeved on the fixed rod; and

the mounting seat is arranged on the inner wall of the inner cavity and is provided with a fixing hole matched with the fixing rod; the mounting seat is of a disc-shaped structure; a plurality of air holes are arranged on the mounting seat, the axes of the fixing holes and the axes of the air holes are arranged in the same direction with the axis of the air inlet,

the blades are arranged on the pipe sleeve and wound around the axis of the fixed rod to form a circumferential array, mounting grooves matched with the mounting seats are formed in the inner wall of the inner cavity, and the mounting grooves are formed in the periphery of the inner wall of the inner cavity in a surrounding mode.

5. The ventilation cap of claim 4, wherein the fixing member comprises a first shaft sleeve and a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are sleeved on the fixing rod and are respectively located at two sides of the pipe sleeve;

one end of the fixed rod is used for being connected with the fixed hole, and the other end of the fixed rod is connected with a limiting block which is used for being abutted to the first shaft sleeve or the second shaft sleeve.

6. The breathable cap according to any one of claims 1 to 5, characterized in that said cap body comprises a cap base and a cap cover connected to said cap base, said blades being provided in said cap base, said fixing member being connected to said cap cover or said cap base.

7. The breathable cap of claim 6, wherein the cap base comprises an intermediate tubular body and a bottom tubular body, the intermediate tubular body being connected to the cap base at one end and to the bottom tubular body at the other end, wherein the air inlet is an opening in the bottom tubular body at the end remote from the intermediate tubular body.

8. The breathable cap of claim 7, wherein the base tube body comprises a first tube section, a first connecting ring piece and a second tube section which are connected in sequence,

and the inner hole diameter of the first pipe section is larger than that of the second pipe section,

the first pipe section is used for being connected with the intermediate pipe body, the blades are arranged in an inner hole of the first pipe section, and the fixing piece is arranged on the inner wall of the second pipe section.

9. The breathable cap according to claim 8, characterized in that said intermediate tubular body comprises a third tubular segment, a second connection ring, a fourth tubular segment, a third connection ring and a fifth tubular segment connected in succession,

and the inner hole apertures of the third pipe section and the fifth pipe section are both larger than the inner hole aperture of the fourth pipe section,

the third pipe section is used for being connected with the cap, the fifth pipe section is used for being connected with the bottom pipe body, a plurality of air outlets are formed in the second connecting ring piece, the third connecting ring piece, the fifth pipe section, the first pipe section and the first connecting ring piece surround the blades, and a space for the blades to rotate is formed.

10. The vented cap of claim 1 wherein the vanes are disposed at an angle relative to the axis of the air inlet.

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