Tractor power output oil seal testing device

Abstract

The utility model relates to a tractor power output oil seal test device, which comprises a support assembly, a medium box and a torque loading device, a tractor chassis is loaded at the upper end of the support assembly, one end of the tractor chassis close to the medium box is provided with a power output transmission assembly, and the power output transmission assembly is provided with a power output shaft. The power output transmission assembly is provided with a power output bearing cover located outside the power output shaft, an oil seal is arranged between the power output bearing cover and the power output shaft, a sealing structure is arranged at one end of the medium box, the end face of the power output bearing cover is connected with the sealing structure in a sealed mode, and the power output shaft penetrates through and extends into the sealing structure. A spraying system is arranged in the medium box, and the torque loading device is in transmission connection with the power output shaft through a universal joint transmission shaft. The device has the advantages that the actual working state of the tractor during field operation can be simulated, the device is not affected by operation seasons, tests can be carried out all the year round, the verification period is prolonged, and the verification efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of tractor power output oil seal testing technology, and in particular to a tractor power output oil seal testing device. Background Technology

[0002] The power take-off (PTO) oil seal is the most critical of all oil seals in a tractor. If a problem occurs, foreign objects, water, etc., can enter the chassis oil, damaging the hydraulic system (including hydraulic pumps, hydraulic motors, and valves). This can lead to damage to the tractor's transmission and hydraulic systems, resulting in significant losses. Some manufacturers in the industry test the performance of the PTO oil seal before the tractor leaves the factory.

[0003] Currently, testing of tractor power take-off (PTO) oil seals involves mounting the oil seal on the entire machine and conducting field tests during the operating season to obtain oil seal reliability data. This process is labor-intensive, costly, and limited by the operating season. The limited operating time each year and the lengthy machine verification process impact vehicle sales.

[0004] Therefore, it is necessary to develop a tractor power output oil seal testing device to overcome the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tractor power output oil seal testing device, which effectively overcomes the defects of the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A tractor power take-off (PTO) oil seal testing device includes a support assembly, a medium tank, and a torque loading device. The support assembly is located at one end of the medium tank, and a tractor chassis is mounted on the upper end of the support assembly. A PTO transmission assembly is located at the end of the tractor chassis near the medium tank. The PTO transmission assembly has a PTO shaft extending outwards. The PTO transmission assembly has a PTO bearing cover located outside the PTO shaft. An oil seal is provided between the PTO bearing cover and the PTO shaft. A sealing structure is located at the end of the medium tank near the tractor chassis. The end face of the PTO bearing cover is sealed to the sealing structure. The PTO shaft passes through and extends into the sealing structure. The medium tank contains simulated slurry and is equipped with a spraying system for spraying slurry onto the oil seal. The torque loading device is located at the other end of the medium tank and is connected to the PTO shaft via a universal joint drive shaft passing through the side wall of the other end of the medium tank.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the aforementioned support assembly includes two sets of support frames, which are respectively supported at both ends of the bottom of the tractor chassis.

[0010] Furthermore, the aforementioned torque loading device is a torque loading motor.

[0011] Furthermore, the aforementioned sealing structure includes a docking circular tube, a flexible cylinder, and a cylindrical sealing fixture. The docking circular tube horizontally penetrates one end of the side wall of the medium tank. One end of the flexible cylinder is sleeved on one end of the docking circular tube, and the two are sealed together. The other end of the flexible cylinder is sleeved on one end of the sealing fixture, and the two are sealed together. A through hole is opened in the middle of the other end of the sealing fixture. A sealing ring groove is provided on the outer side of the through hole. The end face of the power output bearing cover is embedded in the sealing ring groove, and the two are in sealed contact. The sealing fixture is connected to the housing of the power output transmission assembly through a connector. The power output shaft passes through the through hole and extends into the docking circular tube.

[0012] Furthermore, the two ends of the aforementioned flexible cylinder are respectively connected and fixed to the aforementioned docking round pipe and sealing fixture by metal cable ties tightened at both ends.

[0013] Furthermore, the aforementioned flexible cylinder is a rubber component.

[0014] Furthermore, the above-mentioned spraying system includes a spray pipe and a pump body. The pump body is installed in the medium tank. The output end of the pump body is connected to the spray pipe. The spray pipe is connected to spray pipes that extend to both sides of the oil seal.

[0015] Furthermore, the spray pipe is connected to an overflow pipe extending to the upper part of the medium tank. The spray pipe has a pipe section extending to the upper part of the medium tank, and both the pipe section and the overflow pipe are equipped with control valves.

[0016] Furthermore, it also includes a pneumatic agitator to prevent slurry sedimentation, the pneumatic agitator being disposed in the aforementioned medium tank.

[0017] Furthermore, an aeration pipeline is installed on the bottom wall of the aforementioned media tank via a bracket. The port of the aeration pipeline passes through the upper part of the side wall of the aforementioned media tank and extends to the outside of the aforementioned media tank. Multiple aeration holes are opened at the lower part of the aeration pipeline.

[0018] The beneficial effects of this utility model are: the structure is reasonably designed, which can simulate the actual working state of a tractor in the field, is not affected by the working season, and can be tested all year round, thus extending the verification cycle and improving verification efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tractor power output oil seal testing device of this utility model;

[0020] Figure 2 This is a cross-sectional view of the tractor power output oil seal testing device of this utility model;

[0021] Figure 3 This is a top view of the tractor power output oil seal testing device of this utility model;

[0022] Figure 4 for Figure 2 Enlarged view of the structure of part A in the middle.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Medium tank; 2. Torque loading device; 3. Tractor chassis; 4. Universal joint drive shaft; 6. Aeration pipeline; 10. Support frame; 11. Sealing structure; 31. Power output transmission assembly; 51. Spray pipe; 52. Pump body; 111. Connecting round pipe; 112. Flexible cylinder; 113. Sealing fixture; 311. Power output shaft; 312. Power output bearing cover; 313. Oil seal. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] Example

[0027] like Figure 1 , 2 As shown in Figure 3, the tractor power output oil seal testing device of this embodiment includes a support assembly, a medium tank 1, and a torque loading device 2. The support assembly is disposed at one end of the medium tank 1, and the tractor chassis 3 is mounted on the upper end of the support assembly. A power output transmission assembly 31 is provided at the end of the tractor chassis 3 near the medium tank 1. The power output transmission assembly 31 has a power output shaft 311 extending outward therefrom. The power output transmission assembly 31 is provided with a power output bearing cover 312 located outside the power output shaft 311. An oil seal is provided between the power output bearing cover 312 and the power output shaft 311. The oil seal 313 is provided with a sealing structure 11 at one end of the medium tank 1 near the tractor chassis 3. The end face of the power output bearing cover 312 is sealed to the sealing structure 11. The power output shaft 311 passes through and extends into the sealing structure 11. The medium tank 1 is filled with simulated slurry. The medium tank 1 is provided with a spraying system for spraying slurry onto the oil seal 313. The torque loading device 2 is provided at the other end of the medium tank 1. The torque loading device 2 is connected to the power output shaft 311 through a universal joint drive shaft 4 passing through the side wall of the other end of the medium tank 1.

[0028] In this embodiment of the tractor power output oil seal test device, the tractor chassis 3 is an existing product. The tractor chassis 3 is generally equipped with a bracket at one end (the front end) and a power output transmission assembly 31 at the rear end. The power output transmission assembly 31 is connected to the rear axle, and the engine is mounted on the upper end of the bracket. The power output transmission assembly 31 is existing technology (including the power output shaft 311, the power output bearing cover 312, the oil seal 313, etc., which are all existing products), and will not be described in detail here.

[0029] Before the test, the tractor chassis 3 was mounted as a whole on the upper end of the support assembly, and the power output shaft 311 was inserted into the sealing structure 11 at one end of the medium tank 1. The power output bearing cover 312 was sealed to the end of the sealing structure 11. At the same time, the torque loading device 2 at the other end of the medium tank 1 and the shaft end of the power output shaft 311 were connected through the universal joint drive shaft 4. The torque loading device 2 drove the power output shaft 311 to rotate through the universal joint drive shaft 4. During the process, simulated slurry was sprayed towards the oil seal 313 through the spraying system to simulate the working conditions of the oil seal when the tractor is working in the field. The entire test device has a reasonable structural design and can simulate the actual working state of the tractor when working in the field. It is not affected by the working season and can be tested all year round, which extends the verification cycle and improves the verification efficiency.

[0030] In this embodiment, the aforementioned support assembly includes two sets of support frames 10, which are respectively supported at both ends of the bottom of the tractor chassis 3. Each support frame 10 generally includes a base plate and a support plate, with the support plate located above the base plate and multiple support beams connecting them. One set of support frames 10 is supported below a bracket at one end of the tractor chassis 3, while the other set of support frames 10 is supported below the power output transmission assembly 31. This ensures that the gearbox, located in the middle of the tractor chassis 3, is level.

[0031] In this embodiment, the torque loading device 2 uses a torque loading motor of a suitable model. The universal joint drive shaft 4 passes through a suitable hole on the other side wall of the medium tank 1 and is connected to the output end of the torque loading device 2. A rubber ring is set at the hole, tightly wrapped around the universal joint drive shaft 4, which plays a sealing role in the hole and prevents the slurry in the medium tank 1 from splashing through the hole.

[0032] In this embodiment, the simulated slurry in the medium tank 1 is taken from the field and is a mixture of water and mud.

[0033] As a preferred implementation method, such as Figure 4As shown, the sealing structure 11 includes a docking circular tube 111, a flexible cylinder 112, and a cylindrical sealing fixture 113. The docking circular tube 111 horizontally penetrates one end of the side wall of the medium tank 1. One end of the flexible cylinder 112 is sleeved on one end of the docking circular tube 111, and the two are sealed together. The other end of the flexible cylinder 112 is sleeved on one end of the sealing fixture 113, and the two are sealed together. A through hole is opened in the middle of the other end of the sealing fixture 113. A sealing ring groove is provided on the outside of the through hole. The end face of the power output bearing cover 312 is embedded in the sealing ring groove, and the two are in sealed contact. The sealing fixture 113 is connected to the housing of the power output transmission assembly 31 through a connector. The power output shaft 311 passes through the through hole and extends into the docking circular tube 111.

[0034] In the above implementation scheme, the design of the sealing structure 11 facilitates the sealing assembly with the power output bearing cover 312. At the same time, the design of the flexible cylinder 112 can reduce the transmission of vibration generated during the operation of the whole machine to the water tank, achieving the dual effects of shock absorption and sealing.

[0035] In this embodiment, the two ends of the flexible cylinder 112 are respectively connected and fixed to the docking round pipe 111 and the sealing fixture 113 by metal cable ties clamped at both ends. The assembly method is simple and quick.

[0036] In this embodiment, the flexible cylinder 112 is made of rubber.

[0037] In a preferred embodiment, the spraying system includes a spray pipe 51 and a pump body 52. ​​The pump body 52 is installed in the medium tank 1. The output end of the pump body 52 is connected to the spray pipe 51. The spray pipe 51 is connected to spray pipes that extend to both sides of the oil seal 313.

[0038] In the above implementation scheme, when the torque load on the power output shaft 311 passes through the main pipe, the pump body 52 pumps the slurry in the medium tank 1 through the spray pipe 51 to two spray pipes, and sprays it downward through the port of the spray pipe towards the oil seal 313 to simulate the contact condition between the oil seal 313 and the mud in the field.

[0039] In a preferred embodiment, the spray pipe 51 is connected to an overflow pipe b extending to the upper part of the medium tank 1. The spray pipe 51 has a pipe section extending to the upper part of the medium tank 1, and both the pipe section and the overflow pipe are provided with control valves.

[0040] In the above implementation scheme, the overflow pipe is designed to divert the flow when the pump body 52 pumps a large flow rate. At the same time, both the overflow pipe and the spray pipe 51 have pipe sections located at the top of the medium tank 1, which makes it convenient for operators to operate the control valve at the top of the medium tank 1 to adjust the flow rate of the pipeline.

[0041] In a preferred embodiment, a pneumatic agitator is also included to prevent slurry sedimentation, and the pneumatic agitator is disposed in the medium tank 1.

[0042] In the above implementation scheme, the pneumatic agitator injects gas into the simulated slurry in the medium tank 1, causing the slurry to flow, thereby preventing the sediment in the slurry from settling at the bottom and ensuring that the sediment content (concentration) in the slurry meets the requirements of the test.

[0043] In a preferred embodiment, the bottom wall of the media tank 1 is fitted with an aeration pipeline 6 via a bracket. The port of the aeration pipeline 6 passes through the upper part of the side wall of the media tank 1 and extends to the outside of the media tank 1. The lower part of the aeration pipeline 6 has multiple aeration holes.

[0044] In the above implementation scheme, the port of the aeration pipeline 6 is connected to the compressor. The compressor delivers pressurized gas to the aeration pipeline 6, which is then sprayed onto the bottom wall of the medium tank 1 through the aeration control of the aeration pipeline 6, thereby causing the slurry in the medium tank 1 to flow and preventing the sediment from settling and reducing the concentration.

[0045] In this embodiment, the aeration pipeline 6 includes a main pipe and multiple branch pipes. One end of the main pipe extends to the outside of the medium tank 1. The main body of the main pipe extends between the two ends of the medium tank 1. The multiple branch pipes are distributed at intervals between the two ends of the medium tank 1 near the bottom wall and are parallel to each other. Each branch pipe is suspended above the bottom wall of the medium tank 1 by a bracket and has aeration holes distributed at intervals along the length of the pipe.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tractor power take-off oil seal testing device, characterized in that: The system includes a support assembly, a media tank (1), and a torque loading device (2). The support assembly is located at one end of the media tank (1). A tractor chassis (3) is mounted on the upper end of the support assembly. A power output transmission assembly (31) is provided at the end of the tractor chassis (3) near the media tank (1). The power output transmission assembly (31) has a power output shaft (311) extending outside it. The power output transmission assembly (31) has a power output bearing cover (312) located outside the power output shaft (311). An oil seal (313) is provided between the power output bearing cover (312) and the power output shaft (311). The media tank (1) A sealing structure (11) is provided at one end near the tractor chassis (3). The end face of the power output bearing cover (312) is sealed to the sealing structure (11). The power output shaft (311) passes through and extends into the sealing structure (11). The medium tank (1) is filled with simulated slurry. The medium tank (1) is provided with a spraying system. The spraying system is used to spray slurry onto the oil seal (313). The torque loading device (2) is located at the other end of the medium tank (1). The torque loading device (2) is connected to the power output shaft (311) through a universal joint drive shaft (4) that passes through the side wall of the other end of the medium tank (1).

2. The tractor power take-off oil seal testing device according to claim 1, characterized in that: The support assembly includes two sets of support frames (10), which are respectively supported at both ends of the bottom of the tractor chassis (3).

3. The tractor power take-off oil seal testing device according to claim 1, characterized in that: The torque loading device (2) is a torque loading motor.

4. The tractor power take-off oil seal testing device according to claim 1, characterized in that: The sealing structure (11) includes a docking round tube (111), a flexible cylinder (112), and a cylindrical sealing fixture (113). The docking round tube (111) extends horizontally through one end of the side wall of the medium tank (1). One end of the flexible cylinder (112) is sleeved on one end of the docking round tube (111), and the two are sealed together. The other end of the flexible cylinder (112) is sleeved on one end of the sealing fixture (113), and the two are sealed together. A through hole is opened in the middle of the other end of the sealing fixture (113). A sealing ring groove is provided on the outside of the through hole. The end face of the power output bearing cover (312) is embedded in the sealing ring groove, and the two are in sealed contact. The sealing fixture (113) is connected to the housing of the power output transmission assembly (31) through a connector. The power output shaft (311) passes through the through hole and extends into the docking round tube (111).

5. The tractor power take-off oil seal testing device according to claim 4, characterized in that: The two ends of the flexible cylinder (112) are respectively connected and fixed to the docking round pipe (111) and the sealing fixture (113) by metal cable ties tightened at both ends.

6. The tractor power take-off oil seal testing device according to claim 4, characterized in that: The flexible cylinder (112) is a rubber component.

7. The tractor power take-off oil seal testing device according to claim 1, characterized in that: The spraying system includes a spray pipe (51) and a pump body (52). The pump body (52) is installed in the medium tank (1). The output end of the pump body (52) is connected to the spray pipe (51). The spray pipe (51) is connected to spray pipes that extend to both sides near the oil seal (313).

8. The tractor power take-off oil seal testing device according to claim 7, characterized in that: The spray pipe (51) is connected to an overflow pipe extending to the upper part of the medium tank (1). The spray pipe (51) has a pipe section extending to the upper part of the medium tank (1), and both the pipe section and the overflow pipe are equipped with control valves.

9. A tractor power take-off oil seal testing device according to any one of claims 1 to 8, characterized in that: It also includes a pneumatic agitator to prevent slurry sedimentation, the pneumatic agitator being disposed in the medium tank (1).

10. A tractor power take-off oil seal testing device according to claim 9, characterized in that: The bottom wall of the media tank (1) is fitted with an aeration pipeline (6) via a bracket. The port of the aeration pipeline (6) passes through the upper part of the side wall of the media tank (1) and extends to the outside of the media tank (1). Multiple aeration holes are opened at the lower part of the aeration pipeline (6).

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