External oil pipe type agricultural machine gearbox cooling system

Abstract

The utility model discloses an external oil pipe type agricultural machinery gearbox cooling system, which belongs to the technical field of gearboxes and comprises a shell, an oil pump component is arranged on the front side in the shell, an AT shaft system is arranged on the rear side in the shell, an external oil pipe is arranged outside the shell, one end of the external oil pipe is connected with a first cooling oil duct on the front side of the shell, and the other end of the external oil pipe is connected with a second cooling oil duct on the rear side of the shell. And the other end is connected with the second cooling oil duct at the rear side of the shell. According to the designed cooling system, cooling oil can cool and lubricate all parts of the whole gearbox through the designed system cooling oil duct, meanwhile, the design difficulty of the cooling oil duct can be lowered, interference with all assembly parts in the shell is avoided, the machining technology is simplified, the inner space of the shell is saved, and the manufacturing cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gearbox, specifically relates to an external oil pipe type agricultural machinery gearbox cooling system. BACKGROUND

[0002] The agricultural machinery tractor is referred to as agricultural machinery, and the gearbox thereof is usually heavier and larger than other types of gearboxes such as passenger cars, when the gearbox shell cooling system is designed, the cooling oil channel needs to avoid interference with each assembly part inside the shell, and the length and angle of the oil channel and other process casting related problems are considered, therefore, the design of the cooling oil channel of the cooling system has become one of the key technologies faced by the design of the agricultural machinery gearbox. The agricultural machinery CVT gearbox, also known as the infinitely variable gearbox, needs a cooling control system to keep the automatic gearbox always within a reasonable working temperature range to ensure the normal operation of the gearbox, since the external shape and internal structure of various automatic gearboxes are different, the cooling system and the cooling oil channel structure need to be adjusted and designed based on the external shape and internal structure of the gearbox shell.

[0003] The patent No. CN216086406U discloses a motor rotor cooling system of an electric drive assembly for a new energy vehicle, the cooling oil channel is entirely arranged inside the box body, the components of the cooling system and the cooling oil channel structure are relatively compact, the cooling system under the single cooling oil channel structure is not applicable to all structure types of gearboxes. For example, in the case that the oil pump, the oil distribution valve body and the AT shaft system (automatic transmission shaft) are far away from each other inside the two connected shell bodies, the conventional cooling system structure cannot achieve the desired results in consideration of the scheme arrangement, the shell process feasibility and other aspects.

[0004] In view of the above problems, a new type of agricultural machinery CVT gearbox cooling system and cooling oil channel structure are needed, which meets the working mechanism of the cooling system, meets the design requirements of the shell, and can simplify the processing technology, reduce the manufacturing cost, connect the internal and external cooling system elements of the shell, and build the cooling system to realize the cooling and lubrication of each part. SUMMARY

[0005] The utility model aims at providing an external oil pipe type agricultural machinery gearbox cooling system, which simplifies the processing technology, saves the manufacturing cost, saves the internal space of the shell, and avoids interference with each assembly part inside the shell.

[0006] The utility model discloses an external oil pipe type agricultural machinery gearbox cooling system, including the shell, the oil pump assembly is arranged at the inside front side of the shell, and the AT shaft system is arranged at the rear side, the shell outside is equipped with the external oil pipe.

[0007] The utility model discloses a cooling system of agricultural machinery gearbox, which comprises a shell, an oil pump assembly, an AT shaft system and an external oil pipe.

[0008] Specifically, the front side of the shell is provided with a oil distribution valve body, and the oil distribution valve body is connected with the oil pump assembly.

[0009] Specifically, the oil distribution valve body is connected with a temperature control bypass valve, the temperature control bypass valve has two branches, i.e., a main channel and a bypass channel, and the main channel and the bypass channel are cooling oil paths in the shell.

[0010] Specifically, the main channel is connected with one end of a first cooling oil path, and the other end of the first cooling oil path is connected with an opening on the front side of the shell.

[0011] Specifically, the bypass channel is connected with a radiator on the front side of the shell, and the radiator is connected with the first cooling oil path through the cooling oil path of the bypass channel.

[0012] After the oil liquid leaves the oil distribution valve body, it reaches the temperature control bypass valve, and is divided into two cases according to the temperature: when the temperature is low, the temperature control bypass valve is opened, and the oil liquid enters the main channel and reaches the first cooling oil path; when the temperature is high, the temperature control bypass valve is disconnected, the bypass channel is opened, and the oil liquid will first enter the radiator, and then reenters the cooling oil path through the radiator oil return port after heat dissipation, and then enters the first cooling oil path.

[0013] The first cooling oil path is connected with a second cooling oil path through the external oil pipe, the second cooling oil path is located on the rear side of the shell, one end of the second cooling oil path is connected with the AT shaft system, and the other end of the second cooling oil path is connected with an opening on the side of the shell.

[0014] Specifically, the first cooling oil path is provided with a first hollow bolt interface, and the first hollow bolt interface is connected with the external oil pipe through a first hollow bolt.

[0015] Specifically, the second cooling oil channel is provided with a second hollow bolt interface connected with the external oil pipe through a second hollow bolt.

[0016] In the utility model, the first cooling oil channel is arranged on one side of the shell, and the AT shaft system is arranged on the other side of the shell, that is, the second cooling oil channel connected with the AT shaft system is far away from the first cooling oil channel of the cooling oil inlet, an external oil pipe is designed, one end of the external oil pipe is connected with the first hollow bolt to communicate with the first cooling oil channel, the other end of the external oil pipe is connected with the second hollow bolt to communicate with the second cooling oil channel, the external oil pipe is arranged outside the shell, the oil pipe can be prevented from interfering with other parts inside the shell, and the position layout design of the internal oil circuit is simple and convenient.

[0017] Compared with the prior art, the utility model has the advantages that for the agricultural machinery gearbox shell or large-size shell, the size is too large, the oil channel is too long, and the oil channel of the oil distribution valve body is far away from the AT shaft system cooling oil channel, the cooling system designed in the utility model can cool and lubricate each part of the gearbox through the designed system cooling oil channel, and the working of the wet clutch is better met. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other embodiments can be obtained from the provided drawings without creative labor.

[0019] Figure 1 It is a position relation diagram of the utility model one external oil pipe type agricultural machinery gearbox cooling system.

[0020] Figure 2 It is a structure diagram of the first cooling oil channel.

[0021] Figure 3 It is a structure diagram of the second cooling oil channel.

[0022] BRIEF DESCRIPTION OF DRAWINGS MARK: 1-First cooling oil channel;2-First hollow bolt;3-External oil pipe;4-Second cooling oil channel;5-Second hollow bolt;6-Shell;7-Oil pump assembly;8-First hollow bolt interface;9-Second hollow bolt interface;10-AT shaft system. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, an agricultural machinery gearbox cooling system with an external oil pipe includes a housing 6. An oil pump assembly 7 is placed on the front side inside the housing 6, and an AT shaft system 10 is placed on the rear side. An external oil pipe 3 is provided on the outside of the housing 6.

[0027] In this invention, the external oil pipe 3 of the agricultural machinery gearbox cooling system is placed outside the housing 6 because the gearboxes of agricultural tractors are typically heavier and larger than other types of gearboxes, and the oil pump is far from the drive shaft of the AT (automatic transmission) system. Placing the external oil pipe 3 outside the housing avoids interference with the various assemblies inside the housing 6. If cooling oil channels were designed inside the two connected housings, ensuring the cooling oil reaches the AT system last would easily lead to interference with other assemblies, increasing design complexity, or the oil channels would be multi-segmented, increasing process steps, processing difficulty, or even making processing impossible. This invention uses an external oil pipe solution, saving time and costs in the design and manufacture of the cooling system.

[0028] Specifically, an oil distribution valve body is provided on the front side of the interior of the housing 6, and the oil distribution valve body is connected to the oil pump assembly 7. The cooling oil is powered by the oil pump and flows through the oil passage inside the housing 6 to the oil distribution valve body, which is an oil distribution device.

[0029] Specifically, the oil distribution valve body is connected to a temperature-controlled bypass valve, which has two branches: a main channel and a bypass channel. The main channel and the bypass channel are cooling oil passages inside the housing 6.

[0030] Specifically, the main channel connects one end of the first cooling oil channel 1 located in the shell 6, and is connected to the opening on the front side of the shell 6.

[0031] Specifically, the bypass channel connects the radiator on the front side in the shell 6, and the radiator is connected to the first cooling oil channel 1 through the cooling oil path of the bypass channel.

[0032] After the oil liquid leaves the oil distribution valve body, it reaches the temperature control bypass valve, which is divided into two cases according to the temperature: when the temperature is low, the temperature control bypass valve is opened, and the oil liquid enters the main channel to reach the first cooling oil channel 1; when the temperature is high, the temperature control bypass valve is disconnected, the bypass channel is opened, the oil liquid will first enter the radiator, and after the heat dissipation is completed, it reenters the cooling oil path through the radiator oil return port, and then enters the first cooling oil channel 1.

[0033] As shown in Figs. Figure 2 and Figure 3 , the first cooling oil channel 1 is connected with the second cooling oil channel 4 through the external oil pipe 3, the second cooling oil channel 4 is located inside the rear side of the shell 6, one end is connected with the AT shaft system 10, and the other end is connected to the opening on the side of the shell 6. After the oil liquid leaves the oil distribution valve body, it flows into the first cooling oil channel 1, the external oil pipe 3 and the second cooling oil channel 4 connected with the AT shaft system 10 in sequence.

[0034] Specifically, the first cooling oil channel 1 is provided with a first hollow bolt interface 8, and the first hollow bolt interface 8 is connected with the external oil pipe 3 through a first hollow bolt 2.

[0035] Specifically, the second cooling oil channel 4 is provided with a second hollow bolt interface 9, and the second hollow bolt interface 9 is connected with the external oil pipe 3 through a second hollow bolt 5.

[0036] Figure 2 and Figure 3 The direction indicated by the arrow in the figure is the flow direction of the cooling oil.

[0037] In the utility model, since the first cooling oil channel 1 is located on one side of the shell, and the AT shaft system is arranged on the other side of the shell, that is, the second cooling oil channel 4 connected with the AT shaft system is far away from the first cooling oil channel 1 of the cooling oil flow direction, the external oil pipe 3 is designed, one end of the external oil pipe 3 is connected with the first hollow bolt 2 to communicate with the first cooling oil channel 1, the other end is connected with the second hollow bolt 5 to communicate with the second cooling oil channel 4, and the external oil pipe 3 is arranged outside the shell 6, so that the oil pipe can be avoided from interfering with other parts inside the shell 6, and the position layout design of the internal oil path is simple and convenient. In use, the cooling oil liquid enters the AT shaft system cooling oil path through the first cooling oil channel 1, the external oil pipe 3 and the second cooling oil channel 4, flows into each part of the AT shaft system for cooling and lubrication, and the remaining oil liquid is extracted by the oil pump for circulation, forming a system closed loop.

[0038] It should be noted that the terms "comprises", "comprising", "includes", "including", "contains", "containing" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, includes, contains or contains a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises, includes, contains or contains the identified element.

[0039] It should also be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, specify relative positions or orientation relationships based on the positions or orientation relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] The above-described embodiments and / or implementations are only used to illustrate the preferred embodiments and / or implementations of the present application, and do not limit the embodiments of the present application in any form. Any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, but should be considered as the same as the present application.

[0041] The principles and implementation manners of the present application are described herein by using specific examples, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only preferred embodiments of the present application, and it should be pointed out that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. An external tubing type cooling system for a farm machine transmission, comprising a housing (6), characterized in that: The oil pump assembly (7) is arranged on the front side of the shell (6), and the AT shaft system (10) is arranged on the rear side of the shell (6).

2. The external tubing type agricultural machine transmission cooling system according to claim 1, characterized in that: The oil distribution valve body is arranged on the front side of the shell (6) and connected with the oil pump assembly (7).

3. The external tubing type agricultural machine transmission cooling system according to claim 2, characterized in that: The oil distribution valve body is connected with the temperature control bypass valve, the temperature control bypass valve has two branches, i.e. a main channel and a bypass channel, and the main channel and the bypass channel are cooling oil paths in the shell (6).

4. The external tubing type agricultural machine transmission cooling system according to claim 3, characterized in that: One end of the first cooling oil path (1) is connected with the main channel, the first cooling oil path (1) is arranged in the shell (6), and the other end is connected with an opening on the front side of the shell (6).

5. An external coiled tubing type agricultural machine transmission cooling system according to claim 4, characterized in that: The bypass channel is connected with the radiator on the front side in the shell (6), and the radiator is connected with the first cooling oil path (1) through the cooling oil path of the bypass channel.

6. An external coiled tubing type farm machinery transmission cooling system according to claim 4, characterized in that: The first cooling oil path (1) is connected with the second cooling oil path (4) through the external oil pipe (3).

7. An external coiled tubing type farm machinery transmission cooling system according to claim 6, characterized in that: The second cooling oil path (4) is arranged on the rear side in the shell (6), one end is connected with the AT shaft system (10), and the other end is connected with an opening on the side of the shell (6).

8. The external coiled tubing type farm machinery transmission cooling system according to claim 6, characterized in that: The first cooling oil path (1) is provided with the first hollow bolt interface (8), the first hollow bolt interface (8) is connected with the external oil pipe (3) through the first hollow bolt (2).

9. The external coiled tubing type farm machinery transmission cooling system according to claim 6, characterized in that: The second cooling oil path (4) is provided with the second hollow bolt interface (9), the second hollow bolt interface (9) is connected with the external oil pipe (3) through the second hollow bolt (5).

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