A waterproof breather valve for a speed reducer

Abstract

The application discloses a waterproof and breathable valve for a speed reducer, which comprises a valve body, a dustproof cover, a waterproof and breathable film and a sealing ring, the dustproof cover is connected with one end of the valve body, the sealing ring is sleeved on the other end of the valve body, the waterproof and breathable film is located between the valve body and the dustproof cover, and the waterproof and breathable valve further comprises: a flow limiting component installed in the valve body and used for slowing down the rising of oil gas, a labyrinth structure is arranged in the flow limiting component; an oil absorption assembly installed in the valve body and used for absorbing oil, the oil absorption assembly is located between the waterproof and breathable film and the flow limiting component; the oil absorption assembly comprises a positioning ring and one or more supporting rings connected with the positioning ring, and one piece of oil absorption cotton is arranged between the positioning ring and the supporting ring and between two adjacent supporting rings; and the waterproof and breathable valve has the advantages of simple structure, convenient assembly and reduced use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of breather valve, in particular to a waterproof breather valve for reducer. BACKGROUND

[0002] The waterproof breather valve is mainly used for waterproof and air permeation of products and balancing pressure difference between the inside and outside of the products, and the waterproof and air permeation purpose is achieved through the waterproof and air permeation film with high air permeation capacity of the waterproof breather valve, and the pressure difference can be well balanced.

[0003] In the prior art, the commonly used breather valve adopts a whole oil absorption cotton or a structure in which a plurality of oil absorption cottons are stacked together, when the oil gas molecules are adsorbed on the oil absorption cotton on the side close to the reducer, the oil gas molecules can diffuse on the oil absorption cotton and reach the side close to the waterproof and air permeation film of the oil absorption cotton, and finally are separated from the oil absorption cotton under the action of the internal pressure of the reducer, but the oil gas molecules are washed to the waterproof and air permeation film by the airflow, which affects the air permeation performance of the waterproof and air permeation film, and finally leads to the decrease of the air permeation capacity and the imbalance of the internal and external air pressure. SUMMARY

[0004] The present application provides a waterproof breather valve for reducer, which increases the anti-attenuation capacity of the waterproof and air permeation film, ensures the balance of the internal and external air pressure of the reducer, and improves the service life of the breather valve.

[0005] The technical solution for solving the above technical problems is as follows:

[0006] A waterproof breather valve for reducer, comprising a valve body, a dust cover, a waterproof and air permeation film, and a sealing ring, wherein the dust cover is connected with one end of the valve body, the sealing ring is sleeved on the other end of the valve body, and the waterproof and air permeation film is located between the valve body and the dust cover, and further comprising:

[0007] A flow limiting component is installed in the valve body for slowing down the rising of oil gas, and the flow limiting component is internally provided with a labyrinth structure;

[0008] An oil absorption assembly is installed in the valve body for adsorbing oil, and the oil absorption assembly is located between the waterproof and air permeation film and the flow limiting component;

[0009] The oil absorption assembly comprises a positioning ring and one or more supporting rings connected with the positioning ring, and one piece of oil absorption cotton is arranged between the positioning ring and the supporting ring and between two adjacent supporting rings.

[0010] Further, the dust cover comprises a cover body, a plurality of buckles are arranged on the axial end of the cover body, the valve body comprises a main body, a head portion is arranged on one end of the main body, a shoulder is arranged on the peripheral surface of the head portion, a threaded portion is arranged on the other end of the main body, the threaded portion is matched with the reducer box body, a bolt head is arranged between the threaded portion and the main body, a circular cavity is formed between the bolt head and the peripheral surface of the threaded portion, the sealing ring is located in the circular cavity, and the buckles are matched with the shoulders.

[0011] Further, the oil absorption assembly and the waterproof and breathable membrane have a first gap, and the oil absorption assembly and the flow limiting component have a second gap.

[0012] Further, the axial end of the head is provided with a large hole, and the axial end of the main body is provided with a small hole, the large hole and the small hole are in communication.

[0013] Further, the diameter of the positioning ring is larger than the diameter of the supporting ring, the positioning ring is in interference fit with the hole wall of the large hole of the head, the supporting ring and the hole wall of the small hole of the main body have a small gap, the diameter of the oil absorption cotton is larger than the diameter of the supporting ring, and the oil absorption cotton is in interference fit with the hole wall of the small hole of the main body.

[0014] Further, the axial end of the positioning ring is provided with a first positioning hole, the axial end of the supporting ring is provided with a positioning boss and a second positioning hole, and the axial end of the oil absorption cotton is provided with a third positioning hole, the positioning boss of the supporting ring is inserted into the first positioning hole of the positioning ring through the third positioning hole of the oil absorption cotton, or the positioning boss of the supporting ring is inserted into the second positioning hole of the adjacent supporting ring through the third positioning hole of the oil absorption cotton.

[0015] The application has the advantages that the application can adjust the oil absorption capacity of the oil absorption cotton by increasing or reducing the number of the supporting ring and the oil absorption cotton, and the upstream end of the oil absorption assembly is provided with the flow limiting component, and the flow limiting component is internally provided with the labyrinth mechanism, so that the rising of the oil gas is slowed down. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the waterproof and breathable valve for the speed reducer of the application;

[0017] Figure 2 It is a perspective view of the dust cover of the waterproof and breathable valve for the speed reducer of the application;

[0018] Figure 3 It is a sectional view of the valve body of the waterproof and breathable valve for the speed reducer of the application;

[0019] Figure 4 It is a sectional view of the oil absorption assembly of the waterproof and breathable valve for the speed reducer of the application;

[0020] Figure 5 It is a perspective view of the oil absorption assembly and the flow limiting component of the waterproof and breathable valve for the speed reducer of the application;

[0021] Figure 6 It is a schematic view of the flow direction of the oil gas molecules in the valve body and the flow limiting component;

[0022] Figure 7 It is an explosion view of the waterproof and breathable valve for the speed reducer of the application.

[0023] The markings in the attached diagram are as follows: valve body 1, main body 1a, small through hole 1a-1, head 1b, large through hole 1b-1, shoulder 1c, threaded part 1d, bolt head 1e, circular cavity 1f, stop block 1g, dust cover 2, cover 2a, buckle 2b, notch 2c, waterproof and breathable membrane 3, sealing ring 4, flow limiting component 5, labyrinth structure 5a, positioning ring 411, first positioning hole 411a, support ring 412, positioning boss 412a, second positioning hole 412b, oil-absorbing cotton 413, third positioning hole 413a. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 7 As shown, a waterproof and breathable valve for a speed reducer includes a valve body 1, a dust cover 2, a waterproof and breathable membrane 3, and a sealing ring 4. The dust cover 2 is connected to one end of the valve body 1, the sealing ring 4 is fitted onto the other end of the valve body 1, and the waterproof and breathable membrane 3 is located between the valve body 1 and the dust cover 2. It also includes:

[0026] A flow-limiting component 5 is installed inside the valve body 1 to slow down the rise of oil and gas. The flow-limiting component 5 has a labyrinth structure 5a inside.

[0027] An oil-absorbing assembly is installed inside the valve body 1 and is used to absorb oil. The oil-absorbing assembly is located between the waterproof and breathable membrane 3 and the flow-limiting component 5.

[0028] The oil-absorbing assembly includes a positioning ring 411 and one or more support rings 412 connected to the positioning ring 411. An oil-absorbing cotton 413 is provided between the positioning ring 411 and the support ring 412 and between two adjacent support rings 412.

[0029] Specifically, in this embodiment, four support rings 412 are preferentially provided. Therefore, an oil-absorbing cotton 413 is provided between every two adjacent support rings 412, and an oil-absorbing cotton 413 is provided between the positioning ring 411 and the support ring 412, for a total of four oil-absorbing cotton 413 and four support rings 412 (see...). Figure 4), the entire oil absorption assembly can increase or decrease the number of support rings 412 and oil absorption cotton 413 (i.e. set one piece of oil absorption cotton 413 or multiple pieces of oil absorption cotton 413) by reducing the oil pressure intensity inside the speed reducer, thereby adjusting the oil absorption capacity of the oil absorption cotton 413. The present application avoids the problem of performance degradation of the waterproof and breathable membrane 3 caused by the direct stacking of a single integral oil absorption cotton 413 or multiple pieces of oil absorption cotton 413, and by setting a flow limiting component 5 upstream of the oil absorption assembly, using the labyrinth structure 5a inside the flow limiting component 5 to slow down the rising speed of oil and gas molecules, significantly improving the anti-degradation performance of the breathable valve, ensuring the balance of air pressure inside and outside the speed reducer, and further improving the reliability of the speed reducer.

[0030] The dust cover 2 comprises a cover body 2a, and the axial end of the cover body 2a is provided with a plurality of buckles 2b. The valve body 1 comprises a main body 1a, one end of the main body 1a is provided with a head 1b, the peripheral surface of the head 1b is provided with a clamping shoulder 1c, the other end of the main body 1a is provided with a threaded portion 1d, the threaded portion 1d is matched with the reducer box, a bolt head 1e is arranged between the threaded portion 1d and the main body 1a, a circular cavity 1f is formed between the peripheral surface of the threaded portion 1d and the bolt head 1e, a sealing ring 4 is arranged in the circular cavity 1f, and the buckle 2b is matched with the clamping shoulder 1c.

[0031] Specifically, in the embodiment, the dust cover 2 and the valve body 1 are preferentially connected in a buckle manner, and can also be connected in a threaded manner. The axial end of the cover body 2a of the dust cover 2 is provided with a plurality of buckles 2b. Adjacent two buckles 2b are provided with a gap 2c, which is mainly used for discharging oil and gas molecules in the valve body 1 and for the entry of fresh gas. The threaded portion 1d on the main body 1a of the valve body 1 is matched with the reducer shell in a threaded manner. The sealing ring 4 is mainly used for sealing the reducer shell and the threaded portion 1d to prevent the internal oil of the reducer from leaking from the threaded portion 1d. The bolt head 1e is mainly used for facilitating the installation and disassembly of the entire waterproof and breathable valve. The bolt head 1e is designed as an outer hexagon, and can be directly twisted with common tools (adjustable wrench, sleeve, etc.). The inner hole of the threaded portion 1d is provided with a plurality of stepped blocks 1g. The stepped blocks 1g can also slow down the rising speed of oil and gas molecules, thereby improving the anti-degradation performance of the breathable valve.

[0032] The oil absorption assembly and the waterproof and breathable membrane 3 have a first gap therebetween, and the oil absorption assembly and the flow limiting component 5 have a second gap therebetween.

[0033] Specifically, the oil absorption assembly is not in contact with the waterproof and breathable film 3 and the flow limiting component 5, and the advantage of this design is that after the oil gas molecules are discharged from the reducer shell, they first reach the flow limiting component 5, and the oil gas molecules are in the form of mist, which can directly wet the flow limiting component 5. If the flow limiting component 5 is directly in contact with the oil absorption assembly, the speed of the oil absorption assembly in contact with and absorbing the oil gas molecules will be accelerated. However, by adopting the above structure, the flow limiting component 5 is not in contact with the oil absorption assembly, so that the oil gas molecules rise upward through the internal curved flow channel, thereby reducing the speed of the oil absorption assembly being wetted by the oil gas. Similarly, the oil absorption assembly is also not in contact with the waterproof and breathable film 3, which can avoid the oil gas molecules being too concentrated, so that the oil absorption assembly loses the adsorption ability and is directly conducted to the waterproof and breathable film 3.

[0034] The axial end of the head 1b is provided with a large hole 1b-1, and the axial end of the main body 1a is provided with a small hole 1a-1. The large hole 1b-1 is in communication with the small hole 1a-1.

[0035] The diameter of the positioning ring 411 is greater than the diameter of the supporting ring 412. The positioning ring 411 is in interference fit with the hole wall of the large hole 1b-1 of the head 1b. The supporting ring 412 has a small gap between the hole wall of the small hole 1a-1 of the main body 1a. The diameter of the oil absorption cotton 413 is greater than the diameter of the supporting ring 412. The oil absorption cotton 413 is in interference fit with the hole wall of the small hole 1a-1 of the main body 1a.

[0036] The axial end of the positioning ring 411 is provided with a first positioning hole 411a. The axial end of the supporting ring 412 is provided with a positioning boss 412a and a second positioning hole 412b. The axial end of the oil absorption cotton 413 is provided with a third positioning hole 413a. The positioning boss 412a of the supporting ring 412 is inserted into the first positioning hole 411a of the positioning ring 411 through the third positioning hole 413a of the oil absorption cotton 413, or the positioning boss 412a of the supporting ring 412 is inserted into the second positioning hole 412b of the adjacent supporting ring 412 through the third positioning hole 413a of the oil absorption cotton 413.

[0037] Specifically, the diameter of the positioning ring 411 is greater than the diameter of the supporting ring 412. The positioning ring 411 is assembled and positioned by interference fit with the hole wall of the large hole 1b-1 of the head 1b. The diameter of the supporting ring 412 is smaller than the diameter of the small hole 1a-1 of the main body 1a. The thickness of the supporting ring 412 ensures that the two pieces of oil absorption cotton 413 are not attached together. The positioning ring 411 and the supporting ring 412 are both designed to be hollow in the middle, which facilitates the flow of oil gas molecules. The diameter of the oil absorption cotton 413 is greater than the hole wall of the inner hole of the main body 1a, so as to prevent the oil gas from bypassing the oil absorption cotton 413 and rising along the hole wall of the inner hole of the main body 1a.

[0038] Finally, it should be noted that the above-described embodiments are merely preferred embodiments of the present application for describing the technical solutions of the present application, and are not intended to limit the present application, and are not intended to limit the protection scope of the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the protection scope of the claims.

Claims

1. A waterproof breather valve for a speed reducer, comprising a valve body (1), a dust cover (2), a waterproof breather membrane (3), and a sealing ring (4), wherein the dust cover (2) is connected to one end of the valve body (1), the sealing ring (4) is sleeved on the other end of the valve body (1), and the waterproof breather membrane (3) is located between the valve body (1) and the dust cover (2), characterized in that, Also include: The flow limiting component (5) is installed inside the valve body (1) for slowing down the oil gas rising, and the inside of the flow limiting component (5) is provided with a labyrinth structure (5a); The oil absorption assembly is installed inside the valve body (1) and is used for absorbing oil, and the oil absorption assembly is located between the waterproof and breathable membrane (3) and the flow limiting component (5); The oil absorption assembly includes a positioning ring (411) and a plurality of support rings (412) connected with the positioning ring (411), a piece of oil absorption cotton (413) is arranged between the positioning ring (411) and the support ring (412) and between two adjacent support rings (412), the valve body (1) includes a main body (1a), one end of the main body (1a) is provided with a head (1b), an axial end of the head (1b) is provided with a large through hole (1b-1), an axial end of the main body (1a) is provided with a small through hole (1a-1), the large through hole (1b-1) is in communication with the small through hole (1a-1); the diameter of the positioning ring (411) is greater than the diameter of the support ring (412), the positioning ring (411) is in interference fit with the hole wall of the large through hole (1b-1) of the head (1b), there is a small gap between the support ring (412) and the hole wall of the small through hole (1a-1) of the main body (1a), the diameter of the oil absorption cotton (413) is greater than the diameter of the support ring (412), the oil absorption cotton (413) is in interference fit with the hole wall of the small through hole (1a-1) of the main body (1a), an axial end of the positioning ring (411) is provided with a first positioning hole (411a), an axial end of the support ring (412) is provided with a positioning boss (412a) and a second positioning hole (412b), an axial end of the oil absorption cotton (413) is provided with a third positioning hole (413a), the positioning boss (412a) of the support ring (412) passes through the third positioning hole (413a) of the oil absorption cotton (413) and is inserted into the first positioning hole (411a) of the positioning ring (411), or the positioning boss (412a) of the support ring (412) passes through the third positioning hole (413a) of the oil absorption cotton (413) and is inserted into the second positioning hole (412b) of another adjacent support ring (412).

2. The waterproof breather valve for a speed reducer according to claim 1, wherein The dust cover (2) includes a cover body (2a), an axial end of the cover body (2a) is provided with a plurality of buckles (2b), a circumferential surface of the head (1b) is provided with a clamping shoulder (1c), the other end of the main body (1a) is provided with a threaded portion (1d), the threaded portion (1d) is matched with a reducer box body, a bolt head (1e) is arranged between the threaded portion (1d) and the main body (1a), a circular cavity (1f) is formed between the bolt head (1e) and the circumferential surface of the threaded portion (1d), a sealing ring (4) is located in the circular cavity (1f), and the buckle (2b) is matched with the clamping shoulder (1c).

3. The waterproof breather valve for a speed reducer according to claim 1, wherein The oil absorption assembly and the waterproof and breathable membrane (3) have a first gap, and the oil absorption assembly and the flow limiting component (5) have a second gap.

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