Waterproof ventilation valve

Abstract

An impurity particle filtering part fixed through a fixing piece is arranged in a lower end channel of a waterproof ventilation channel, a gear oil filtering part which is arranged on a first step and covers the lower end channel of the waterproof ventilation channel is arranged in an upper end channel of the waterproof ventilation channel, and the outer side and the upper end of the gear oil filtering part are limited and fixed through a spacer bush. The center of the spacer bush is provided with a through hole, the spacer bush is fixedly provided with a breathable film through a fixing plate, the breathable film covers the spacer bush, the dustproof cap covers the upper end of the connector body and an upper end channel of the waterproof breathable channel at the upper end of the connector body, and an air circulation channel is arranged between the dustproof cap and the outer side of the upper end of the connector body. The fixing plate is provided with a first opening communicated with the air circulation channel and the breathable film. The waterproof ventilation valve has the advantages of being small in size, low in cost, easy to assemble, long in service life, convenient to machine, suitable for gearboxes in severe environments and capable of meeting the requirement for air pressure balance of inner and outer cavities.

Description

Technical Field

[0001] The utility model relates to a waterproof and breathable valve. Background Art

[0002] The gearbox cavity often works in different high and low temperature environments, so there will be a pressure difference between the inner and outer cavities. The pressure difference needs to be balanced through a breather valve. However, the breather valves on the market are used in areas with better environments and cannot be applied to heavy-duty truck gearboxes in harsh environments. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a waterproof breathable valve.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a waterproof and breathable valve, comprising a joint body, a dust cap, a fixing plate, a breathable membrane, a spacer, a gear oil filter component, an impurity particle filter component and a fixing plate. The lower end of the joint body is used to connect the gearbox, and a waterproof and breathable channel is provided in the joint body, which runs through the upper and lower ends of the joint body. The waterproof and breathable channel is an inverted convex shape with a larger upper portion and a smaller lower portion, with a first step as a transition in the middle. The lower end channel of the waterproof and breathable channel is provided with an impurity particle filter component fixed by a fixing plate, the upper end channel of the waterproof and breathable channel is provided with a gear oil filter component placed on the first step and covering the lower end channel of the waterproof and breathable channel, the outer side and upper end of the gear oil filter component are limited and fixed by the spacer, a through hole is provided in the center of the spacer, the breathable membrane is fixed on the spacer by the fixing plate, the breathable membrane covers the spacer, the dust cap covers the upper end of the joint body and the upper end channel of the waterproof and breathable channel at the upper end of the joint body, and an air circulation channel is provided between the dust cap and the outer side of the upper end of the joint body, and a first opening connecting the air circulation channel and the breathable membrane is provided on the fixing plate.

[0005] Furthermore, the upper inner end of the dust cap is pressed against the fixed plate, and the lower edge of the dust cap is provided with an anti-slip flange.

[0006] Furthermore, the gear oil filter component is wool felt.

[0007] Furthermore, the foreign particle filtering component is a filter mesh.

[0008] Furthermore, a raised circular snap-fitting portion lower than the fixed plate is provided at the upper end of the joint body, and the circular snap-fitting portion is engaged with the lower end of the edge of the dust cap, and several edges of the outer side of the circular snap-fitting portion are milled to form an air circulation channel.

[0009] Furthermore, a raised circular snap-fitting portion lower than the fixed plate is provided at the upper end of the connector body, and the circular snap-fitting portion is engaged with the lower end of the edge of the dust cap, and several holes are punched at the outer side of the circular snap-fitting portion to form an air circulation channel.

[0010] Furthermore, a second step that shrinks inward is provided at the lower end of the outer side of the fixing plate, and a third step that shrinks inward is provided on the inner side of the upper end of the waterproof and breathable channel. The fixing plate is fixed to the upper end of the waterproof and breathable channel by limiting and fixing the second and third steps.

[0011] Furthermore, the second step and the third step are interference fit.

[0012] Furthermore, the joint body is provided with a hexagonal surface for rotation with a wrench at the lower end of the circular engaging portion.

[0013] The beneficial effects of the utility model are: the waterproof breathable valve has small size, low cost, simple assembly, long service life, convenient processing, is suitable for gearboxes in harsh environments, and meets the requirements for balanced air pressure in internal and external cavities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the patent structure.

[0015] Figure 2 It is a cross-sectional view of the circular engaging portion.

[0016] Figure 3 It is a side cross-sectional view of the air circulation channel.

[0017] Figure 4 It is a schematic diagram of the main structure of the joint. DETAILED DESCRIPTION

[0018] The following is a combination of the appended examples of the present invention Figure 1-4 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-4, a waterproof breathable valve, comprising a joint body 1, a dust cap 2, a fixing plate 3, a breathable membrane 4, a spacer 5, a gear oil filter component 6, a foreign particle filter component 7 and a fixing plate 8. The lower end of the joint body is used to connect the gearbox. A waterproof breathable channel is provided in the joint body, which runs through the upper and lower ends of the joint body. The waterproof breathable channel is an inverted convex shape with a larger upper portion and a smaller lower portion, with a first step 9 as a transition in the middle. A foreign particle filter component fixed by a fixing plate is provided in a channel 10 at the lower end of the waterproof breathable channel. A channel 11 at the upper end of the waterproof breathable channel is provided with a gear oil filter component placed on the first step and covering the lower end channel of the waterproof breathable channel. The outer side and upper end of the gear oil filter component are limited and fixed by the spacer. A through hole 12 is provided in the center of the spacer. The breathable membrane is fixed on the spacer by a fixing plate. The breathable membrane covers the spacer. The dust cap covers the upper end of the joint body and the upper end channel of the waterproof breathable channel at the upper end of the joint body, and an air circulation channel 13 is provided between the dust cap and the outer side of the upper end of the joint body. A first opening 14 connecting the air circulation channel and the breathable membrane is provided on the fixing plate.

[0020] A waterproof breathable valve, wherein the inner upper end of a dust cap is pressed on a fixed plate, and the lower end of the edge of the dust cap is provided with an anti-slip flange.

[0021] A waterproof breathable valve, wherein the gear oil filtering component is wool felt.

[0022] A waterproof breathable valve, wherein the impurity particle filtering component is a filter net.

[0023] A waterproof breathable valve, the upper end of the joint body is provided with a raised circular clamping part 16 lower than the fixed plate, the circular clamping part cooperates with the lower end of the edge of the dust cap, and the outer side of the circular clamping part is milled at several places to form an air circulation channel.

[0024] A waterproof breathable valve has a joint body with a raised circular snap-fitting portion lower than a fixed plate at the upper end. The circular snap-fitting portion is engaged with the lower end of the edge of a dust cap. Several holes are punched outside the circular snap-fitting portion to form an air circulation channel.

[0025] A waterproof breathable valve, wherein the lower end of the outer side of the fixing plate is provided with a second step 17 which is reduced inwards, and the inner side of the upper end of the waterproof breathable channel is provided with a third step 18 which is reduced inwards. The fixing plate is fixed to the upper end of the waterproof breathable channel by limiting and fixing the second and third steps.

[0026] A waterproof breathable valve, wherein the second step and the third step are interference fit.

[0027] A waterproof breathable valve, wherein a joint body is provided with a hexagonal surface 15 for rotation with a wrench at the lower end of a circular engaging portion.

[0028] A waterproof breathable valve can filter out oil, dirt and impurity particles, avoid the influence of outdoor water, and achieve breathable and balanced pressure difference.

[0029] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A waterproof breathable valve, comprising a connector body, a dust cap, a fixing plate, a breathable membrane, a spacer, a gear oil filter component, a foreign particle filter component, and a fixing plate. The lower end of the connector body is used to connect to a gearbox, and is characterized by: A waterproof and breathable channel is formed inside the joint body, which runs through the upper and lower ends of the joint body. The waterproof and breathable channel is an inverted convex shape with a larger upper portion and a smaller lower portion, and is transitioned by a first step in the middle. The lower end of the waterproof and breathable channel is provided with an impurity particle filtering component fixed by a fixing plate, and the upper end of the waterproof and breathable channel is provided with a gear oil filtering component placed on the first step and covering the lower end of the waterproof and breathable channel. The outer side and the upper end of the gear oil filtering component are limited and fixed by a spacer sleeve, a through hole is provided in the center of the spacer sleeve, a breathable membrane is fixed on the spacer sleeve by a fixing plate, and the breathable membrane covers the spacer sleeve, a dust cap covers the upper end of the joint body and the upper end of the waterproof and breathable channel at the upper end of the joint body, and an air circulation channel is provided between the dust cap and the outer side of the upper end of the joint body, and a first opening connecting the air circulation channel and the breathable membrane is provided on the fixing plate.

2. The waterproof breathable valve according to claim 1, characterized in that: The upper end of the inner side of the dust cap is pressed on the fixed plate, and the lower end of the edge of the dust cap is provided with an anti-slip flange.

3. The waterproof breathable valve according to claim 2, characterized in that: The gear oil filter element is wool felt.

4. The waterproof breathable valve according to claim 3, characterized in that: The foreign particle filtering component is a filter.

5. The waterproof breathable valve according to claim 2, characterized in that: The upper end of the joint body is provided with a raised circular clamping part lower than the fixed plate. The circular clamping part is engaged with the lower end of the edge of the dust cap, and several edges of the outer side of the circular clamping part are milled to form an air circulation channel.

6. The waterproof breathable valve according to claim 1, characterized in that: The upper end of the joint body is provided with a raised circular clamping part which is lower than the fixed plate. The circular clamping part is engaged with the lower end of the edge of the dust cap, and several holes are punched on the outside of the circular clamping part to form an air circulation channel.

7. The waterproof breathable valve according to claim 1, characterized in that: A second step that shrinks inward is provided at the lower end of the outer side of the fixing plate, and a third step that shrinks inward is provided on the inner side of the upper end of the waterproof and breathable channel. The fixing plate is fixed to the upper end of the waterproof and breathable channel by limiting and fixing the second and third steps.

8. The waterproof breathable valve according to claim 7, characterized in that: There is interference fit between the second step and the third step.

9. The waterproof breathable valve according to claim 5, characterized in that: The joint body is provided with a hexagonal surface for rotation by a wrench at the lower end of the circular engaging portion.

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