CN215763187U - Variable speed drive's anti-aeration plug oil bleeding structure - Google Patents

Abstract

The utility model discloses an oil leakage prevention structure of a vent plug of a variable speed transmission mechanism, wherein the variable speed transmission mechanism comprises a front shell, a middle partition plate, a rear shell, a rotary gear and a vent plug, the front shell and the middle partition plate form a front cavity, the middle partition plate and the rear shell form a rear cavity, the upper part of the front shell is provided with an exhaust cavity, and the outer end of the exhaust cavity is provided with a vent plug mounting hole for mounting the vent plug; an oil blocking rib plate is arranged between the exhaust cavity and the front cavity and is opposite to the vent plug mounting hole; the lubricating oil splashed by the rotation gear is blocked by the oil blocking rib plate and basically cannot directly reach the exhaust cavity and the vent plug mounting hole through splashing. The structure effectively avoids the problem of oil leakage of the vent plugs of the transmission and the reducer in the prior art, and reduces the fault loss; meanwhile, a design idea is provided for the development of similar products in the future.

Description

Variable speed drive's anti-aeration plug oil bleeding structure

Technical Field

The utility model relates to the technical field of transmissions, in particular to an oil leakage prevention structure of a vent plug of a variable speed transmission mechanism.

Background

In the mechanical field, a variable speed transmission mechanism is often used for increasing or reducing the speed of power of a driving mechanism and then transmitting the power to a working mechanism, wherein the variable speed transmission mechanism comprises a speed changer and a speed reducer.

A transmission is a mechanism for changing the speed and torque from an engine, which can change the ratio of the output shaft to the input shaft, either fixed or in steps, also known as a gearbox. The reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine.

In order to timely discharge high-temperature and high-pressure gas generated during operation of the speed change transmission mechanism, a vent plug is arranged in an automobile speed change transmission mechanism (speed changer/speed reducer) assembly, so that the high-temperature and high-pressure gas can be discharged out of a cavity through the vent plug in time. The breather plug is then vented and there is a risk that the lubricating oil inside the transmission (transmission/retarder) will escape from the breather plug.

In order to allow the breather plug to satisfy both the venting function and avoid the problem of oil drainage under certain specific operating conditions, labyrinth features are often designed into the transmission (transmission/reducer) that prevent oil from bleeding through the breather plug.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an oil leakage prevention structure of a vent plug of a variable speed transmission mechanism, which can meet the exhaust function and avoid the problem of oil leakage of the vent plug.

Therefore, the utility model provides an oil leakage prevention structure of a vent plug of a variable speed transmission mechanism, the variable speed transmission mechanism comprises a front shell, a middle partition plate, a rear shell, a rotary gear and the vent plug, the front shell and the middle partition plate form a front cavity, the middle partition plate and the rear shell form a rear cavity, an exhaust cavity is arranged at the upper part of the front shell, and a vent plug mounting hole for mounting the vent plug is arranged at the outer end of the exhaust cavity.

An oil blocking rib plate is arranged between the exhaust cavity and the front cavity and is opposite to the vent plug mounting hole; the lubricating oil splashed by the rotation gear is blocked by the oil blocking rib plate and basically cannot directly reach the exhaust cavity and the vent plug mounting hole through splashing.

Further, the upper portion of the rear cavity is provided with a vent hole, the upper portion of the middle partition plate is provided with a vent hole which enables the rear cavity to be communicated with the exhaust cavity, and the middle partition plate is further provided with a through hole which enables the rear cavity to be communicated with the front cavity.

Furthermore, an oil guide groove which is horizontally arranged is arranged in the variable speed transmission mechanism, penetrates through the through hole, and guides oil liquid gathered in the front cavity into the rear cavity.

Further, an oil discharge groove is formed in the lower portion of the rear cavity and located on the lower side of the installation position of the oil guide groove, and an oil return port is formed in the bottom of the middle partition plate.

According to the oil leakage prevention structure of the vent plug of the variable speed transmission mechanism, the oil blocking rib plate is arranged, so that lubricating oil is effectively prevented from directly splashing and reaching the mounting hole part of the vent plug, and the vent plug is prevented from being leaked out; the oil discharging structure is arranged, so that the phenomenon that lubricating oil is excessively gathered around the vent plug mounting hole under various working conditions to cause overflow is effectively avoided; therefore, the problem of oil leakage of vent plugs of a transmission and a speed reducer in the prior art is effectively avoided, and the fault loss is reduced; meanwhile, a design idea is provided for the development of similar products in the future.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a first schematic diagram of the internal structure of an anti-plug oil bleed structure of a variable speed transmission according to the present invention;

FIG. 2 is a second schematic diagram of the internal structure of the vent plug oil bleeding prevention structure of the variable speed transmission mechanism of the present invention;

FIG. 3 is a schematic structural view of the front housing in the vent plug oil bleeding prevention structure of the transmission mechanism of the present invention;

FIG. 4 is a schematic view of the construction of the intermediate bulkhead in the vent plug oil bleed prevention structure of the variable speed transmission of the present invention;

FIG. 5 is a schematic structural view of the rear housing in the vent plug oil bleed prevention configuration of the transmission of the present invention;

fig. 6 is a schematic perspective view of the front housing and the rotary gear after being assembled in the oil leakage preventing structure of the transmission mechanism according to the present invention.

Description of the reference numerals

1. A front housing; 2. a middle partition plate; 3. a rear housing; 4. a rotating gear; 5. a vent plug; 6. an oil guide groove; 11. a front cavity; 12. a vent plug mounting hole; 13. oil blocking rib plates; 14. an exhaust chamber; 21. a through hole; 22. an oil return port; 23. a vent hole; 31. a rear cavity; 32. a vent; 33. an oil discharge groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, in the oil leakage prevention structure of the variable speed transmission mechanism, an oil blocking rib plate structure is arranged in the inner cavity of the shell corresponding to the mounting position of the vent plug, so that lubricating oil can be prevented from directly reaching the vent plug hole under normal conditions; meanwhile, in order to avoid the phenomenon that lubricating oil is gathered in the inner cavity of the vent plug mounting hole under a specific working condition, an oil discharge structure is arranged at the position, corresponding to the inner cavity, of the vent plug mounting hole.

Specifically, the structure comprises an oil blocking rib plate 13, an exhaust cavity 14, an air vent 32, a vent plug 5, an oil drainage groove 33, an oil return port 22 and the like; the splashed lubricating oil is blocked by the oil blocking rib plate 13 and is prevented from being directly discharged from the exhaust cavity 14, the oil discharge groove 33 can timely discharge the lubricating oil accumulated in the oil guide groove and flow back to the bottom of the front cavity 11 through the oil return opening 22, and the phenomenon that the more oil is accumulated, the more oil is caused to emerge from the vent plug 5 is avoided.

As shown in fig. 1, the front housing 1 and the middle partition 2 form a front cavity 11, the middle partition 2 and the rear housing 3 form a rear cavity 31, the two cavities of the front cavity 11 and the rear cavity 31 are communicated through the through hole 21 in the middle partition 2, and both the main moving parts are arranged in the front cavity 11.

As shown in fig. 3 and 6, a vent plug mounting hole 12 for mounting the vent plug 5 is formed in the upper portion of the front housing 1, an oil blocking rib plate 13 is further formed in the upper portion of the front housing 1, and the oil blocking rib plate 13 is opposite to the vent plug mounting hole 12; an exhaust cavity 14 is divided from the front cavity 11 in the front shell 1 through an oil blocking rib plate 13, wherein a vent plug mounting hole 12 is arranged at the outer end of the exhaust cavity 14.

When the variable-speed transmission mechanism operates under normal working conditions, lubricating oil splashed during operation of the rotary gear 4 in the variable-speed transmission mechanism is blocked by the oil blocking rib plate 13 and basically cannot directly reach the exhaust cavity 14 and the vent plug mounting hole 12 through splashing, so that the problem that the lubricating oil directly overflows through the vent plug 5 is solved. In addition, the intermediate partition plate 2 is arranged on one side of the front shell 1, so that the lubricating oil can be prevented from splashing along the axial direction of the rotating gear 4.

As shown in fig. 6, an oil guide groove 6 is further arranged in the variable speed transmission mechanism, a through hole 21 is arranged on the intermediate partition plate 2, and the oil guide groove 6 penetrates through the intermediate partition plate 2 to communicate the front cavity 11 in the front shell 1 with the rear cavity 31 in the rear shell 3; when the oil pumping unit operates under normal working conditions, splashed oil generated by rotation of the rotary gear 4 cannot directly reach the exhaust cavity 14 because the splashed oil is blocked by the oil blocking rib plate 13 and the middle partition plate 2, and only flows into the rear cavity 31 from the front cavity 11 through the through hole 21 of the middle partition plate 2 and the oil guide groove 6; in this case, there is no problem that the oil is blown out from the breather plug 5.

Specifically, in the assembled state of the speed change transmission mechanism, the upper part of the rear cavity 31 is provided with a vent 32, and the upper part of the middle partition plate 2 is provided with a vent hole; communicating the rear chamber 31 with the exhaust chamber 14; under certain conditions such as long-time operation or high-speed operation, the gas inside the front cavity 11 enters the rear cavity 31 through the through hole 21 due to the temperature rise and pressure rise of the gas inside the front cavity caused by a large amount of heat generated inside the front cavity. The gas entering the rear chamber 31 flows into the venting chamber 14, which can be vented to the outside in the direction of the arrows in fig. 5, and finally vented through the venting plug.

In addition, when specific operating mode such as long-time operation or high-speed operation, because inside has produced a large amount of heats and makes inside gas heat up and step up, at this moment have a large amount of fluid through leading in the oil groove gets into back cavity 31, because the oil mass is too many can spill over from leading the oil groove top, and if the fluid that spills over is not in time discharged, including reasons such as internal pressure and air current, fluid then can pile up gradually in leading the oil groove top, until reaching vent department and getting into the breather plug and following the air current and emerging together.

In order to prevent the accumulation of oil, as shown in fig. 5, an oil drain groove 33 is provided in the rear chamber 31, the oil drain groove 33 is located below the installation position of the oil guide groove 6, and an oil return port 22 is provided in the bottom of the intermediate partition 2. Under specific working conditions of long-time operation or high-speed operation and the like, a large amount of lubricating oil accumulated in the oil guide groove 6 overflows, enters the rear cavity 31, and flows into the bottom of the front cavity 11 through the oil discharge groove 33 and the oil return opening 22, so that accumulation is avoided, and the oil is prevented from overflowing from the vent plug.

The vent hole 32 is placed on the shell without moving parts during structural design, and when the transmission mechanism normally operates under a common working condition, lubricating oil splashed during operation of the rotary gear 4 in the transmission mechanism is blocked by the oil blocking rib plate 13 and basically cannot directly reach the mounting hole part of the vent plug through splashing, so that the problem that the lubricating oil directly overflows through the vent plug is solved.

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

Claims (4)

1. The oil leakage structure of the ventilation plug of the variable speed transmission mechanism is characterized in that the variable speed transmission mechanism comprises a front shell (1), a middle partition plate (2), a rear shell (3), a rotary gear (4) and a ventilation plug (5), wherein the front shell (1) and the middle partition plate (2) form a front cavity (11), the middle partition plate (2) and the rear shell (3) form a rear cavity (31),

wherein, the upper part of the front shell (1) is provided with an exhaust cavity (14), the outer end of the exhaust cavity (14) is provided with a vent plug mounting hole (12) for mounting the vent plug (5),

an oil blocking rib plate (13) is arranged between the exhaust cavity (14) and the front cavity (11), and the oil blocking rib plate (13) is opposite to the vent plug mounting hole (12); the lubricating oil splashed during the operation of the rotary gear (4) is blocked by the oil blocking rib plate (13) and cannot directly splash to reach the exhaust cavity (14) and the vent plug mounting hole (12).

2. The structure of preventing oil leakage of a vent plug of a variable speed transmission mechanism according to claim 1, wherein the rear chamber (31) has a vent hole (32) at an upper portion thereof, the intermediate partition plate (2) has a vent hole (23) at an upper portion thereof for communicating the rear chamber (31) with the exhaust chamber (14), and the intermediate partition plate (2) has a through hole (21) for communicating the rear chamber (31) with the front chamber (11).

3. The structure of preventing oil leakage of the vent plug of the variable speed transmission mechanism according to claim 2, wherein an oil guide groove (6) is horizontally arranged in the variable speed transmission mechanism, and the oil guide groove (6) penetrates through the through hole (21) to guide the oil liquid accumulated in the front cavity (11) into the rear cavity (31).

4. The structure for preventing oil leakage of the vent plug of the variable speed transmission mechanism according to claim 3, wherein an oil discharge groove (33) is formed in the lower portion of the rear cavity (31), the oil discharge groove (33) is located on the lower side of the installation position of the oil guide groove (6), and an oil return opening (22) is formed in the bottom of the intermediate partition plate (2).

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