Respirator air pressure balance oil return pipeline system and tractor

Abstract

The utility model relates to a respirator air pressure balance oil return pipeline system and a tractor. The respirator air pressure balance oil return pipeline system comprises a rear axle shell and a two-gear box shell. An oil return pipeline is connected between the rear axle shell and the two-gear box shell, and an air pressure balance pipeline is connected between the two-gear box shell and the rear axle shell. The top of the rear axle shell is connected with a respirator, and a lubricating oil injection opening is formed in the two-gear box shell. A hydraulic system is connected between the rear axle shell and the two-gear box shell and can pump out lubricating oil in the rear axle shell and inject the lubricating oil into the two-gear box shell through the lubricating oil injection port. According to the utility model, the lubricating oil can be circularly radiated between the two-gear box and the rear axle shell, and the air pressure balance pipeline is arranged between the two shells, so that the defect of independently arranging a respirator is avoided, and the air pressure balance and the liquid level height consistency of the lubricating oil in the two shells are kept.

Description

Technical Field

[0001] This application relates to the field of tractor technology, and more specifically, to a breather pressure balance return oil pipeline system and a tractor. Background Technology

[0002] Currently, there is no communication between the two gearboxes and the rear axle housing for lubricating oil. For these two small, separate housings, the heat dissipation performance is low, which can easily lead to high temperatures.

[0003] Meanwhile, for independent shells, an independent respirator is required, which undoubtedly increases equipment costs and the workload of disassembly and assembly. Utility Model Content

[0004] The purpose of this application is to provide a breather pressure balance return oil pipeline system and a tractor, which enables the lubricating oil to circulate and dissipate heat between the two housings of the gearbox and the rear axle housing. By setting a pressure balance pipeline between the two housings, the drawbacks of setting a separate breather are avoided, and the internal pressure balance and lubricating oil level of the two housings are maintained.

[0005] To achieve the above objectives, in the first aspect, this utility model provides a respirator air pressure balance return oil pipeline system, including a rear axle housing and a two-gear box housing;

[0006] An oil return line is connected between the rear axle housing and the two gearbox housings, and an air pressure balance line is connected between the two gearbox housings and the rear axle housing.

[0007] A breather is connected to the top of the rear axle housing, and a lubricating oil injection port is provided on the two gearbox housings.

[0008] A hydraulic system is connected between the rear axle housing and the two gearbox housings. The hydraulic system can extract lubricating oil from the rear axle housing and inject it into the two gearbox housings through the lubricating oil injection port.

[0009] In an optional embodiment, the rear axle housing is provided with a lubricating oil filler port, which is used to add lubricating oil into the rear axle housing.

[0010] In an optional embodiment, the rear axle housing is provided with a lubricating oil outlet, and the hydraulic system is connected between the lubricating oil outlet and the lubricating oil inlet.

[0011] In an optional embodiment, the air pressure balancing pipeline is connected to the top of the rear axle housing and the two gearbox housings;

[0012] The return oil line is connected to the bottom of the rear axle housing and the two gearbox housings.

[0013] In an optional embodiment, the two ends of the return oil pipeline are respectively connected to the rear axle housing and the two gearbox housings by bolts;

[0014] The two ends of the air pressure balance pipeline are connected to the rear axle housing and the two gearbox housings respectively by threads.

[0015] In an optional embodiment, both the oil return line and the air pressure balance line are rigid lines extending horizontally in a straight line, and the diameter of the oil return line is larger than the diameter of the air pressure balance line.

[0016] In an optional embodiment, the rear axle housing and the two gearbox housings each include oppositely disposed housing end faces;

[0017] The oil return line is arranged in parallel with the air pressure balance line, and the extension direction of the two lines is perpendicular to the end face of the housing.

[0018] In an optional embodiment, the rear axle housing is provided with an output shaft end cover and a gear shaft cover plate. The output shaft end cover is connected to the rear axle housing by bolts, and the gear shaft cover plate is fixed to the rear axle housing by a retaining ring.

[0019] In an optional embodiment, the center of the lubricating oil injection port is not lower than the axis of the return oil pipeline.

[0020] Secondly, this utility model provides a tractor, including the breather pressure balance return oil pipeline system described in any of the foregoing embodiments.

[0021] The breather pressure balance return oil pipeline system of this utility model has a structure that connects the return oil pipeline between the rear axle housing and the two gearbox housings. Combined with the hydraulic system set between the two housings, it can make the lubricating oil circulate between the rear axle housing and the two gearbox housings, thereby enabling circulating heat dissipation and preventing high temperature.

[0022] By installing a pressure balancing pipeline between the two housings, the pressure inside the two housings can be kept balanced, allowing the lubricating oil to circulate between the two housings and maintaining a consistent lubricating oil level inside both housings.

[0023] The respirator connected to the top of the rear axle housing, combined with the air pressure balancing pipeline connecting the two housings, helps maintain the balance of the internal working chambers and external air pressure of the two housings, thereby reducing the need for additional respirator connections on the two housings and lowering equipment costs.

[0024] At the same time, the respirator can maintain breathing action with the outside, and can ensure the reliable extraction and injection of lubricating oil between the two housings.

[0025] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the respirator pressure balance return oil pipeline system in this application;

[0028] Figure 2 This is a schematic diagram of the rear axle housing.

[0029] Figure 3 This is a schematic diagram of the connection structure of the return oil pipeline and the air pressure balance pipeline on the housing of the two gearboxes.

[0030] icon:

[0031] 1-Rear axle housing; 11-Lubricating oil filler port; 12-Lubricating oil extraction port; 13-Output shaft end cover; 14-Gear shaft cover plate;

[0032] 2-Two-gearbox housing; 21-Lubricating oil inlet;

[0033] 3-Return oil line;

[0034] 4-Pressure balancing pipeline;

[0035] 5. Respirator. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] See Figure 1 and combined Figures 2-3 The breather pressure balance return oil pipeline system in this application mainly creates conditions for the circulation of lubricating oil between the two housings by setting necessary lubricating oil connecting pipelines and connecting air passages to maintain air pressure balance between the rear axle housing 1 and the two gearbox housings 2, which is conducive to heat dissipation during circulation. At the same time, it can establish an air pressure balance relationship inside the two housings. While keeping the lubricating oil level inside the two housings the same, the two independent housings no longer need to be equipped with separate breathers 5, reducing equipment costs and reducing disassembly and assembly workload.

[0040] Specifically, referring to the accompanying drawings, the respirator air pressure balance return oil pipeline system of this utility model includes a rear axle housing 1 and a two-gear box housing 2.

[0041] For the specific structure of the necessary lubricating oil connection pipeline and the air connection pipeline to maintain air pressure balance, there is an oil return pipeline 3 between the rear axle housing 1 and the two gearbox housing 2, and an air pressure balance pipeline 4 between the two gearbox housing 2 and the rear axle housing 1.

[0042] The return oil line 3 and the air pressure balance line 4 are mainly used to facilitate the flow of lubricating oil between the two housings and to balance the air pressure between the two housings.

[0043] The interconnected flow of lubricating oil and the balance of air pressure established above create the necessary preconditions for the circulation of lubricating oil between the two housings.

[0044] Meanwhile, based on the internal air pressure balance of the two housings, in order to maintain the balance between the internal and external air pressure of the two housings, by connecting the respirator 5 only to the top of the rear axle housing 1, the additional respirator 5 on the two gearbox housings 2 can be reduced, thereby reducing equipment costs.

[0045] The two gearbox housing 2 is provided with a lubricating oil injection port 21. A hydraulic system is connected between the rear axle housing 1 and the two gearbox housing 2. The hydraulic system can extract the lubricating oil in the rear axle housing 1 and inject it into the two gearbox housing 2 through the lubricating oil injection port 21.

[0046] From the perspective of the circulation flow of lubricating oil, the lubricating oil in this utility model is specifically drawn onto the rear axle housing 1 and injected into the two gearbox housing 2 under the action of an external hydraulic system (not shown in the figure).

[0047] Specifically, the circulation mechanism of the lubricating oil includes the following: after lubricating oil is added to the rear axle housing 1, based on the air pressure balance between the two housings, the oil flows into the two gearbox housings 2 through the return oil pipe 3. At the same time, under the action of air pressure balance, the lubricating oil level in the two housings is kept highly consistent.

[0048] When lubricating oil circulation is required, the hydraulic system draws lubricating oil from inside the rear axle housing 1 and injects it into the two gearbox housing 2 through the lubricating oil injection port 21. After being injected into the two gearbox housing 2, the lubricating oil level is dynamically balanced in real time based on the oil exchange formed by the return oil line 3 between the two housings and the air pressure balance inside the two housings. This maintains the dynamic circulation of lubricating oil. At the same time, during the dynamic circulation, external heat dissipation can be carried out in the flowing state, thereby avoiding excessively high stability in the rear axle housing 1 and the two gearbox housing 2.

[0049] During the circulation process, this application is not limited to the extraction and return pressurization injection of oil through a hydraulic system. Oil circulation between the rear axle housing 1 and the two gearbox housing 2 can also be achieved by setting up a separate lubricating oil circulation pump, which will not be elaborated here.

[0050] In the specific implementation process, when the oil inside the rear axle housing 1 is extracted, the breather 5 on the rear axle housing 1 will perform an air intake action with the outside to keep the oil being drawn in. When the lubricating oil is injected into the two gearbox housing 2, combined with the setting of the air pressure balance pipeline 4, due to the increase in air pressure caused by the injection pressure, the breather 5 will perform an air exhalation action with the outside. Therefore, the cycle can achieve a stable oil circulation.

[0051] The rear axle housing 1 is provided with a lubricating oil filler port 11, which is used to add lubricating oil into the rear axle housing 1. The lubricating oil is added into the rear axle housing 1 through the lubricating oil filler port 11, and the lubricating oil is replenished from the outside.

[0052] Meanwhile, regarding the oil circulation process described above, a lubricating oil extraction port 12 is provided at the lowest end of the rear axle housing 1. The hydraulic system is connected between the lubricating oil extraction port 12 and the lubricating oil injection port 21, which can ensure the reliable extraction of lubricating oil from the outside and the injection of lubricating oil into the inside.

[0053] The lubricating oil level is maintained at the middle height. In order to build internal air pressure balance between the two housings, the air pressure balance pipe 4 is connected to the top of the rear axle housing 1 and the two gearbox housings 2, which can avoid the influence of the lubricating oil level on the balance air circuit.

[0054] Furthermore, by connecting the return oil line 3 to the bottom of the rear axle housing 1 and the two gearbox housings 2, the interconnection of oil can be ensured. Preferably, the connection point of the return oil line 3 on the two housings is located below the minimum allowable oil level of the lubricating oil, thereby ensuring the consistency of the lubricating oil level inside the two housings.

[0055] From a connection perspective, the two ends of the return oil line 3 are connected to the rear axle housing 1 and the two gearbox housings 2 respectively via bolts. The two ends of the air pressure balance line 4 are connected to the rear axle housing 1 and the two gearbox housings 2 respectively via threads.

[0056] In this invention, both the return oil pipeline 3 and the air pressure balance pipeline 4 are rigid pipelines that extend horizontally in a straight line. The rigid pipelines that extend horizontally in a straight line can maintain a direct return relationship for the lubricating oil between the two housings, shortening the oil flow path. At the same time, since the air pressure balance only needs to maintain the internal connection between the two housings, the diameter of the air pressure balance pipeline 4 is smaller than the diameter of the return oil pipeline 3.

[0057] The rear axle housing 1 and the two gearbox housings 2 each include housing end faces arranged opposite each other. Specifically, the housing end faces are two parallel opposing planes. The oil return line 3 and the air pressure balance line 4 are arranged in parallel, and the extension direction of the two lines is perpendicular to the housing end faces in the form of opposing planes, which can shorten the air and oil connection distances to the greatest extent.

[0058] The rear axle housing 1 is provided with an output shaft and a gear shaft for transmission. In order to provide a good seal for the lubricating oil and prevent oil leakage, the rear axle housing 1 is provided with an output shaft end cover 13 and a gear shaft cover plate 14. The output shaft end cover 13 is connected to the rear axle housing 1 by bolts, and the gear shaft cover plate 14 is fixed to the rear axle housing 1 by a retaining ring, so as to achieve a good sealing effect.

[0059] The angle at which the oil returns from the circulation point to the housing 2 of the two gearboxes is such that, in order to reduce the impact of the oil pressure of the returned oil on the oil flow in the return oil line 3, the center of the lubricating oil inlet 21 is not lower than the axis of the return oil line 3, so as to maintain the liquid level balance formed by the return oil line 3 and take into account both the oil circulation and the liquid level balance.

[0060] This utility model also provides a tractor, including the breather pressure balance return oil pipeline system mentioned above, which can maintain good heat dissipation performance of the rear axle housing 1 and the two gearbox housing 2, and ensure stable and reliable operation of the tractor.

[0061] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A respirator pressure balance return oil pipeline system, characterized in that, Including the rear axle housing and the two gearbox housings; An oil return line is connected between the rear axle housing and the two gearbox housings, and an air pressure balance line is connected between the two gearbox housings and the rear axle housing. A breather is connected to the top of the rear axle housing, and a lubricating oil injection port is provided on the two gearbox housings. A hydraulic system is connected between the rear axle housing and the two gearbox housings. The hydraulic system can extract lubricating oil from the rear axle housing and inject it into the two gearbox housings through the lubricating oil injection port.

2. The respirator pressure balance return oil pipeline system according to claim 1, characterized in that, The rear axle housing is provided with a lubricating oil filler port, which is used to add lubricating oil into the rear axle housing.

3. The respirator pressure balance return oil pipeline system according to claim 1, characterized in that, The rear axle housing is provided with a lubricating oil outlet, and the hydraulic system is connected between the lubricating oil outlet and the lubricating oil inlet.

4. The respirator pressure balance return oil pipeline system according to claim 1, characterized in that, The air pressure balance pipeline is connected to the top of the rear axle housing and the two gearbox housings; The return oil line is connected to the bottom of the rear axle housing and the two gearbox housings.

5. The respirator pressure balance return oil pipeline system according to claim 1, characterized in that, The two ends of the return oil pipeline are connected to the rear axle housing and the two gearbox housings respectively by bolts; The two ends of the air pressure balance pipeline are connected to the rear axle housing and the two gearbox housings respectively by threads.

6. The respirator pressure balance return oil pipeline system according to any one of claims 1-5, characterized in that, Both the oil return line and the air pressure balance line are rigid lines extending horizontally in a straight line, and the diameter of the oil return line is larger than the diameter of the air pressure balance line.

7. The respirator pressure balance return oil pipeline system according to claim 6, characterized in that, The rear axle housing and the two gearbox housings each include housing end faces disposed opposite to each other; The oil return line is arranged in parallel with the air pressure balance line, and the extension direction of the two lines is perpendicular to the end face of the housing.

8. The respirator pressure balance return oil pipeline system according to claim 6, characterized in that, The rear axle housing is provided with an output shaft end cover and a gear shaft cover plate. The output shaft end cover is connected to the rear axle housing by bolts, and the gear shaft cover plate is fixed to the rear axle housing by a retaining ring.

9. The respirator pressure balance return oil pipeline system according to claim 6, characterized in that, The center of the lubricating oil injection port is not lower than the axis of the return oil pipeline.

10. A tractor, characterized in that, The respirator pressure balance return oil pipeline system includes any one of claims 1-9.

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