DESC:A BREATHER FOR A HYDRAULIC BREATHER ASSEMBLY
[0001] The present disclosure relates to a field of breathers, and in particular, the present disclosure discloses a breather for a gearbox housing.
BACKGROUND

[0002] Traditionally, the air breathers are prone to oil leakage, thus their performance gets hindered as the oil may get splashed in gear box. Some conventional solutions disclose a breather that may be multibody arrangement.
[0003] A conventional solution discloses an air breather attached to a housing, configured to release internal pressure of the housing to the outside. However, the air breather may not include any provision such as a cap to prevent a water inflow.
[0004] Another conventional solution discloses a breather device attached to an automatic transmission of a vehicle The breather device may be capable of preventing performance degradation and failure of equipment by releasing excess gas from the housing of the automatic transmission and preventing water from entering the breather pipe.
[0005] Yet another conventional solution discloses a ventilation cap for a speed reducer for oil leakage resistance. The ventilation cap may be configured for the speed reducer to allow the air to flow in and out of the gear box.
[0006] Yet another conventional solution discloses a breather device that may allow spillage of oil, due to oil splashing by gears in gear box, and the oil to come out of breather, since gear box is of very small size, oil particles move in gear box at very high speed and with increase in temperature due to churning of oil, oil tends to come out from breather which leads to leakage and reduction in lubricating oil quantity in the housing. Thus, breather fails to perform its function.
[0007] Thus, there is a need for a solution to overcome the above-mentioned drawbacks.
OBJECTS OF THE DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed below.
[0009] It is a general or primary object of the present subject matter to provide a gearbox housing for a hydraulic system for maintaining pressure in the housing.
[0010] It is another object of the present subject matter to provide the breather for gearbox housing for relieving hot gases built up in the hydraulic system when oil is heated during working.
[0011] It is another object of the present subject matter to provide a breather for the gearbox housing that releases gases by creating an passage to relieve gases.
[0012] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawings.
SUMMARY
[0013] This summary is provided to introduce concepts related to breather for a gearbox housing. The breather includes a hollow pipe with a plurality of holes around a periphery of the hollow pipe, configured to receive gases and splash oil from the gearbox housing. As the pressure in the gearbox housing increases due to heating produced in the gearbox housing, the gases along with splash oil in the gearbox housing move in an upward direction due to pressure difference created in the gearbox housing. When the splash oil fills the hollow pipe and rise to certain level, it is released through the plurality of holes due to gravitational effect and gases in the hollow pipe released outside due to its light weight than oil. The breather further includes a bolt attached to the hollow pipe, configured to receive the gases from the hollow pipe moving in the upward direction, having a cross hole configured to relieve the gases out of the hydraulic breather.
[0014] In an aspect of the present subject matter, the the hollow pipe includes a first end attached to the housing for receiving the splash oil and the gases, a second end attached to the bolt for passing the gases out of the gearbox housing via the bolt.
[0015] In an aspect of the present subject matter, the breather includes a cap crimped on the breather at the bolt, configured to restrict an access to water in the breather.
[0016] In an aspect of the present subject matter, the plurality of holes is present in a vicinity of a first end of the hollow pipe and the plurality of holes comprises at least two through holes with a second through hole from the plurality of holes situated above a first through hole.
[0017] In an aspect of the present subject matter, the gases are produced when oil is heated inside the housing.
[0018] In an aspect of the present subject matter, the splash oil flows towards the hollow pipe when the oil is churned due to one or more gears.
[0019] In an aspect of the present subject matter, the hollow pipe restricts the splashing of the oil from the cross hole in the bolt by releasing the splash oil from the plurality of holes due to gravitational effect.
[0020] In an aspect of the present subject matter, the splash oil upon being received in the hollow pipe experiences a gravitational pull and gets releases through the plurality of holes. The splash oil is received by the hollow pipe due to splashing of oil because of gears.
[0021] In an aspect of the present subject matter, the bolt is permanently attached to the hollow pipe via one of a brazing technique, or a mig welding technique or made in single part casting.
[0022] In an aspect of the present subject matter, the breather is attached to the gearbox housing via a washer and a plurality of threads present on a surface of the breather.
[0023] In an aspect of the present subject matter, the gearbox housing includes but not limited to hydraulic assembly housing, transmission housing, differential housing etc.
[0024] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
[0026] Fig. 1 illustrates a line diagram depicting a breather for a gearbox housing, in accordance with an embodiment of the present subject matter; and
[0027] Fig. 2 illustrates a line diagram depicting the breather attached with the gearbox housing, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[0028] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0029] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0030] Figure 1 illustrates a line diagram 100 depicting a breather 102 for a gearbox housing, in accordance with an embodiment of the present subject matter. The breather 102 may be configured to prevent a spilling of splash oil outside the gearbox housing while allowing a safe exit of gases. The breather 102 may be configured to allow the safe exit to gases by releasing the splash oil back into the gearbox housing before the splash oil moves upwards enough to spill out of the gearbox housing. The breather 102 may be configured to reduce pressure in the housing by releasing the hot gases as the gases move upwards and are relieved out of the gearbox housing. Furthermore, the breather 102 is open from a bottom side that is the second end with two cross holes to breather out the gases. The breather 102 may be attached to the gearbox housing via a washer and a number of threads present on a surface of the breather 102. Further, examples of the gearbox housing may include, but are not limited to, a hydraulic assembly housing, a transmission housing, and a differential housing.
[0031] Continuing with the above embodiment, the breather 102 may include a hollow pipe 104, a bolt 106, and a cap 108. The hollow pipe 104 and bolt 106 may be a single piece manufactured by casting or any other relevant process. The hollow pipe 104 may include a first and 104a and a second end 104b. The breather assembly 102 attached to the gearbox housing 202 through threads present on the surface of breather 102.
[0032] To that understanding, the hollow pipe 104 may further include a number of holes 106 around a periphery of the hollow pipe 104. The number of holes may be present in a uniform manner around the periphery in a vicinity of the first end 104a of the hollow pipe 104. The hollow pipe 104 may be configured to receive the splash oil and the gases from the housing via the first end 104a and the number of holes 104c may be configured to release the splash oil out of the hollow pipe. The splash oil upon being received in the hollow pipe 104 may experience a gravitational pull and get released through the number of holes 104c. The number of holes 104c may include at least two through holes with a second through hole from the plurality of holes 104c situated above a first through hole that provides multiple passages for the splash oil to be released from the hollow pipe 104.
[0033] The splash oil may be received by the hollow pipe 104 due to a pressure difference inside the hollow pipe 104 and outside the hollow pipe 104. A length of the hollow pipe 104 may allow the splash oil to move downwards due to the gravitational pull and the gases may move in the upward direction. The gases may be produced when oil is heated inside the housing and the splash oil flows towards the hollow pipe 104 when the oil is churned due to one or more gears. Further, upon the release of the splash oil, the atmospheric pressure may be created that allows the gases to move in an upward direction towards the bolt 106.
[0034] Continuing with the above embodiment, the bolt 106 may permanently be attached to the hollow pipe 104 via one of a brazing technique, a mig welding technique, and a single piece casting technique. The bolt 106 may be configured to receive the gases from the hollow pipe 104 moving in the upward direction via the second end 104b attached to the bolt. The bolt 106 may include a cross hole 106a configured to relieve the gases out of the gearbox housing. The hollow pipe 104 may be configured to restrict the splash oil from leaking from the cross hole 106a in the bolt 106 by releasing the splash oil from the number of holes 104c. Moving forward, the cap 108 may be crimped on the breather 102 at the bolt 106 and may be configured to restrict an access to water in the breather 102. The cap 108 may assist in avoiding mud splashes or external ingress of water.
[0035] Figure 2 illustrates a line diagram 200 depicting the breather 102 attached with a gearbox housing 202, in accordance with an embodiment of the present subject matter. The gearbox housing 202 may include a drain gallery that obstructs splash oil, a gravitational restriction of oil which gets stored in the hollow pipe 104 and oil flows down due to gravity, and the cap 108 on the breather 102 may be crimped to avoid a water entry. The breather 102 may have external threads and may further be tightened on housing by a virtue of a washer. The cap 108 may be provided on top of the breather 102 and may be crimped with the breather 102 to restrict water entry into the gearbox housing. The hollow pipe 104 may restrict splashes of oil caused by churning of oil due to gears and may only allow gases to pass.
[0036] As the pressure in the gearbox housing increases due to heating produced in the gearbox housing, the gases along with splash oil in the gearbox housing move in an upward direction due to pressure difference created in the gearbox housing. When the splash oil fills the hollow pipe 104 and rise to certain level, it is released through the plurality of holes due to gravitational effect and gases in the hollow pipe 104 released outside due to its light weight than the splash oil.
[0037] While the detailed description describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions, or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
,CLAIMS:We claim:
1. A breather (102) for a gearbox housing (202), comprising:

a hollow pipe (104) with a plurality of holes (104c) around a periphery of the hollow pipe (104), configured to receive gases and splash oil from the gearbox housing (202), wherein the gases move in an upward direction through the hollow pipe (104) due to a difference in internal pressure and an external pressure of the gearbox housing (202) when the splash oil is released through the plurality of holes (104c); and

a bolt (106) attached to the hollow pipe (104), configured to receive the gases from the hollow pipe (104) moving in the upward direction, having a cross hole (106a) configured to relieve the gases out of the gearbox housing (202).

2. The breather (102) as claimed in claim 1, wherein the hollow pipe (104) comprises:
a first end (104a) attached to the housing for receiving the splash oil and the gases; and

a second end (104b) attached to the bolt (106) for passing the gases out of the gearbox housing (202) via the hollow pipe (104) and the bolt (106).

3. The breather (102) as claimed in claim1 further comprising a cap (108) crimped on the breather (102) at the bolt (106) configured to restrict an access to water in the breather (102).

4. The breather (102) as claimed in claim 1, wherein the plurality of holes (104c) is present in a vicinity of a first end (104a) of the hollow pipe (104) and the plurality of holes (104c) comprises at least two through holes with a second through hole from the plurality of holes (104c) situated above a first through hole.

5. The breather (102) as claimed in claim 1, wherein the gases are produced when oil is heated inside the housing.
6. The breather (102) as claimed in claim 1, wherein the splash oil flows towards the hollow pipe (104) when the oil is churned due to one or more gears.
7. The breather (102) as claimed in claim 1, wherein the hollow pipe (104) restricts the splashing of the splash oil from the cross hole in the bolt (106) by releasing the splash oil from the plurality of holes (104c).
8. The breather (102) as claimed in claim 1 or 7, wherein the splash oil upon being received in the hollow pipe (104) experiences a gravitational pull and gets releases through the plurality of holes (104c), wherein the splash oil is received by the hollow pipe (104) due to a pressure difference inside the hollow pipe (104) and outside the hollow pipe (104).

9. The breather (102) as claimed in claim 1, wherein the bolt (106) is permanently attached to the hollow pipe (104) via one of a brazing technique, a mig welding technique, and a single piece casting technique.
10. The breather (102) as claimed in claim 1, wherein the breather (102) is attached to the gearbox housing (202) via a washer and a plurality of threads present on a surface of the breather (102).