Tractor pto transmission case oil circuit structure and tractor

Abstract

The application relates to the technical field of agricultural machinery equipment, in particular to a tractor PTO transmission box oil path structure and a tractor. The tractor PTO transmission box oil path structure comprises a transmission box assembly, a brake clutch assembly arranged in the transmission box assembly, a brake oil path connected with a brake oil inlet cavity, the brake oil inlet cavity being communicated with a brake cavity of the brake clutch assembly, a lubricating oil path connected with a lubricating oil inlet cavity, and the lubricating oil inlet cavity being communicated with a specified lubricating component and a lubricating cavity of the brake clutch assembly. The tractor PTO transmission box oil path structure provided by the embodiment can realize two oil supply oil paths of brake oil and lubricating oil. In terms of lubrication, through reasonable distribution of pipelines, the lubricating oil can be supplied to different positions respectively, the function of braking and lubrication is met, pipeline distribution is not excessively complex, pipeline disorderly distribution is avoided, too much assembly space is not occupied, and the appearance is not affected.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery and equipment technology, and in particular to a tractor PTO transmission oil circuit structure and tractor. Background Technology

[0002] Currently, with the increasing demand for hydraulic control and lubrication pipelines in tractor PTO (Power Take-Off) transmission boxes, and the increasing requirements for the reliability and aesthetics of hydraulic systems, the requirements for pipeline layout structure have also increased. Due to the compact external layout space of the chassis and the increasingly higher requirements for the reliability of hydraulic control pipelines, the existing PTO transmission box pipeline layout is complex and cumbersome, which not only takes up space but also affects the aesthetics. Utility Model Content

[0003] The purpose of this application is to provide a tractor PTO transmission oil circuit structure and tractor, so as to solve to a certain extent the technical problems of the existing PTO transmission pipeline layout being complex and cumbersome, which not only occupies space but also affects the aesthetics.

[0004] This application provides a hydraulic circuit structure for a tractor PTO transmission, including:

[0005] Transmission gearbox assembly;

[0006] A brake clutch assembly, wherein the brake clutch assembly is disposed in the transmission housing assembly;

[0007] The brake hydraulic circuit includes a brake oil inlet chamber in the transmission box assembly, and the brake hydraulic circuit is connected to the brake oil inlet chamber; the brake clutch assembly includes a brake chamber, and the brake oil inlet chamber is connected to the brake chamber.

[0008] The transmission assembly includes a lubrication inlet chamber, and the lubrication circuit is connected to the lubrication inlet chamber.

[0009] The lubrication inlet chamber is mentioned above, and the brake clutch assembly also includes a lubrication chamber. The lubrication inlet chamber is connected to the lubrication chamber and is also connected to a designated lubrication component.

[0010] In the above technical solution, the brake oil circuit further includes:

[0011] A brake oil inlet pipe, which is connected to the brake oil inlet chamber;

[0012] The control valve includes the brake inlet chamber and the return chamber, which is connected to the brake chamber.

[0013] In any of the above technical solutions, the control valve is further described as a two-position three-way solenoid valve. When the two-position three-way solenoid valve is energized, the brake oil inlet chamber is connected to the brake chamber. When the two-position three-way solenoid valve is de-energized, the brake chamber is connected to the oil return chamber.

[0014] In any of the above technical solutions, the brake oil circuit further includes a first sealing element, which is disposed between the brake oil inlet pipe and the brake oil inlet chamber.

[0015] In any of the above technical solutions, the lubrication circuit further includes a lubrication inlet pipe, the transmission box assembly includes a first lubrication inlet chamber, and the lubrication inlet pipe is connected to the first lubrication inlet chamber; the brake clutch assembly includes a lubrication chamber, and the first lubrication inlet chamber is connected to the lubrication chamber.

[0016] In any of the above technical solutions, the lubrication circuit further includes: a dual-axis lubrication pipe inlet chamber, wherein the dual-axis lubrication pipe inlet chamber is connected to the first lubrication inlet chamber;

[0017] A dual-axis oil inlet pipe, one end of which is connected to the oil inlet chamber of the dual-axis lubrication pipe;

[0018] The transmission box assembly includes two shafts, each with its own oil inlet chamber. The other end of the oil inlet pipe is connected to the oil inlet chamber.

[0019] In any of the above technical solutions, the designated lubrication component is a needle roller bearing, the needle roller bearing is sleeved on the two shafts, the oil inlet chamber of the two shafts is provided with a lubrication channel, and the lubrication channel is positioned directly opposite the needle roller bearing.

[0020] In any of the above technical solutions, the oil circuit structure of the tractor PTO transmission box further includes a second seal, which is disposed between the lubrication inlet pipe and the first lubrication inlet chamber.

[0021] In any of the above technical solutions, the oil circuit structure of the tractor PTO transmission box further includes a fixing component, and the oil inlet pipe of the second shaft is fixed to the oil inlet chamber of the second shaft through the fixing component.

[0022] This application also provides a tractor that includes the oil circuit structure of the tractor PTO transmission box described in any of the above technical solutions, and thus has all the beneficial technical effects of the tractor PTO transmission box oil circuit structure, which will not be repeated here.

[0023] Compared with the prior art, the beneficial effects of this application are as follows:

[0024] The tractor PTO transmission oil circuit structure provided in this application includes: a transmission assembly; a brake clutch assembly disposed within the transmission assembly; a brake oil circuit, the transmission assembly including a brake oil inlet chamber, the brake oil circuit connected to the brake oil inlet chamber; the brake clutch assembly including a brake chamber, the brake oil inlet chamber communicating with the brake chamber; a lubrication oil circuit, the transmission assembly including a lubrication oil inlet chamber, the lubrication oil circuit connected to the lubrication oil inlet chamber; the brake clutch assembly also including a lubrication chamber, the lubrication oil inlet chamber communicating with the lubrication chamber, and the lubrication oil inlet chamber also communicating with a designated lubrication component.

[0025] The tractor PTO transmission oil circuit structure provided in this embodiment can realize two oil supply circuits: brake oil and lubricating oil. In terms of lubrication, through the reasonable layout of the pipeline, it can achieve flow diversion and supply lubricating oil to different positions. While meeting the braking and lubrication functions, it can effectively avoid the pipeline layout being too complicated, thus avoiding the messy distribution of pipelines that would occupy too much assembly space and affect the aesthetics.

[0026] The tractor provided in this application includes the aforementioned PTO transmission oil circuit structure. Therefore, the PTO transmission oil circuit structure of this tractor makes the braking and lubrication oil circuits of the transmission assembly simpler, thereby effectively reducing the installation space occupied by the transmission assembly on this tractor. The pipeline layout is simple and beautiful, and it is also convenient for later inspection and maintenance. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the hydraulic circuit structure of the tractor PTO transmission box provided in an embodiment of this application;

[0029] Figure 2 A partial structural diagram of the brake oil circuit of the tractor PTO transmission oil circuit structure provided in this application embodiment;

[0030] Figure 3 This is a schematic diagram of another part of the brake oil circuit of the tractor PTO transmission oil circuit structure provided in the embodiments of this application;

[0031] Figure 4 A partial structural schematic diagram of the lubrication circuit of the tractor PTO transmission oil circuit structure provided in the embodiments of this application;

[0032] Figure 5This is a schematic diagram of another part of the lubrication circuit of the tractor PTO transmission oil circuit structure provided in the embodiments of this application.

[0033] Figure 6 This is a schematic diagram of another part of the lubrication circuit of the tractor PTO transmission oil circuit structure provided in the embodiments of this application.

[0034] Figure label:

[0035] 100-Transmission box assembly, 200-Clutch assembly, 300-Brake oil circuit, 400-Lubricating oil circuit, 1-Control valve, 101-Brake oil inlet chamber, 102-Return oil chamber, 2-Brake oil inlet pipe, 3-Brake chamber, 4-First seal, 5-Lubricating oil inlet pipe, 6-First lubricating oil inlet chamber, 7-Lubricating chamber, 8-Second shaft oil inlet pipe, 9-Second shaft oil inlet chamber, 10-Lubricating channel, 11-Needle roller bearing, 12-Fixing component, 13-Second seal, 14-Second shaft, 15-Second shaft lubrication pipe oil inlet chamber. Detailed Implementation

[0036] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0037] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0038] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and 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," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] The following reference Figures 1 to 6 This application describes the oil circuit structure of the tractor PTO transmission box and the tractor as described in the embodiments of this application.

[0042] See Figures 1 to 6 As shown, an embodiment of this application provides a tractor PTO transmission oil circuit structure. This tractor PTO transmission oil circuit structure includes: a transmission assembly 100, a brake clutch assembly 200, a brake oil circuit 300, and a lubrication oil circuit 400. The transmission assembly 100 includes a PTO, which is the output shaft of the transmission assembly 100 (the output shaft can also be considered as the second shaft 14 described below). The PTO also includes an input shaft (not shown in the figure). The brake clutch assembly 200 is disposed on the input shaft. The transmission assembly 100 includes an independent brake oil inlet chamber 101 and a lubrication oil inlet chamber. The brake clutch assembly 200 includes a brake chamber 3 and a lubrication chamber 7. The inlet ends of the brake oil circuit 300 and the lubrication oil circuit 400 are respectively connected to the upper-level main oil inlet valve. The brake oil circuit 300 is connected to the brake oil inlet chamber 101 to supply hydraulic oil as brake fluid. The brake oil inlet chamber 101 is connected to and communicates with the brake chamber 3, allowing brake fluid to flow into the brake chamber 3. The lubrication oil circuit 400 is connected to the lubrication oil inlet chamber to supply hydraulic oil as lubricant. The lubricant in the lubrication oil inlet chamber is divided into two paths: one flows to the lubrication chamber 7 to lubricate the brake clutch, and the other flows to a designated lubrication component to lubricate the designated lubrication component. In this embodiment, the designated lubrication component can specifically be a needle roller bearing 11.

[0043] As can be seen, the oil circuit structure of the tractor PTO transmission box provided in this embodiment can realize two oil supply circuits: brake oil and lubricating oil. In terms of lubrication, through the reasonable layout of the pipeline, the flow can be split and lubricating oil can be supplied to different positions. While meeting the braking and lubrication functions, it can effectively avoid the pipeline layout being too complicated, thereby avoiding the messy distribution of pipelines that would occupy too much assembly space and affect the aesthetics.

[0044] Specifically, the brake oil circuit 300 includes a brake inlet pipe 2 and a control valve 1. The control valve 1 is provided with a brake inlet chamber 101. One end of the brake inlet pipe 2 is connected to the main inlet valve, and the other end of the brake inlet pipe 2 is connected to the inlet of the brake inlet chamber 101. The brake oil flows through the brake inlet pipe 2 to the control valve 1 and into the brake inlet chamber 101. The control valve 1 can control the opening and closing of the brake oil circuit 300.

[0045] Preferably, in this embodiment, the control valve 1 is specifically a two-position three-way solenoid valve, which can switch the valve core position and change the passage by changing the energization and de-energization. The control valve 1 includes an oil inlet, a connection port, and an oil return port, and also includes an oil return chamber 102 and the aforementioned brake oil inlet chamber 101. That is, the aforementioned brake oil inlet chamber 101 is specifically the oil inlet chamber of the solenoid valve. The oil inlet is connected to the brake oil inlet chamber 101, the connection port is connected to the brake chamber 3 of the brake clutch assembly 200, and the oil return port is connected to the oil return chamber 102. Brake oil can flow into the control valve 1 through the oil inlet. When the control valve 1 is energized, the oil inlet and the connection port are connected, and the brake oil flows to the brake chamber 3 through the connection port, so that the brake clutch assembly 200 can brake. When the control valve 1 is de-energized, the connection port and the oil return port are connected, and the brake oil in the brake chamber 3 flows back to the oil return chamber 102 through the connection port. The brake oil flowing into the oil return chamber 102 causes the brake chamber 3 to be unloaded, and the brake clutch assembly 200 releases the brake.

[0046] Furthermore, the oil circuit structure of the PTO transmission box of this tractor also includes a first seal 4, which is specifically an O-ring. The first seal 4 is sleeved on the outside of the brake oil inlet pipe 2 and is located between the brake oil inlet pipe 2 and the inlet of the brake oil inlet chamber 101 to seal the brake oil inlet pipe 2 and prevent leakage.

[0047] Furthermore, the lubrication circuit 400 includes a lubrication inlet pipe 5, one end of which is connected to the main inlet valve. The transmission assembly 100 is provided with a first lubrication inlet chamber 6, and the other end of the lubrication inlet pipe 5 is connected to the first lubrication inlet chamber 6, allowing lubricating oil to flow into the first lubrication inlet chamber 6. The lubrication oil is then diverted through the first lubrication inlet chamber 6, with the diversion path as follows:

[0048] Firstly, the first lubrication inlet chamber 6 is connected to the lubrication chamber 7 of the clutch assembly 200, so that the lubricating oil in the first lubrication inlet chamber 6 can flow to the clutch assembly 200 for lubrication.

[0049] Secondly, the lubrication circuit 400 also includes a dual-shaft lubrication pipe inlet chamber 15 and a dual-shaft oil inlet pipe 8. The dual-shaft lubrication pipe inlet chamber 15 is connected to the first lubrication inlet chamber 6, so that the lubricating oil in the first lubrication inlet chamber 6 can flow into the dual-shaft lubrication pipe inlet chamber. The transmission box assembly 100 also includes a dual-shaft 14, which is provided with a dual-shaft oil inlet chamber 9. One end of the dual-shaft oil inlet pipe 8 is connected to the dual-shaft lubrication pipe inlet chamber 15, and the other end of the dual-shaft oil inlet pipe 8 is connected to the dual-shaft oil inlet chamber 9, so that the lubricating oil in the first lubrication inlet chamber 6 can flow to the dual-shaft oil inlet chamber 9.

[0050] Furthermore, the designated lubrication component is a needle roller bearing 11, which is sleeved on the outside of the second shaft 14. The needle roller bearing 11 is coaxially arranged with the second shaft 14. The second shaft oil inlet cavity 9 is coaxially arranged with the second shaft 14. The second shaft oil inlet cavity 9 is provided with a lubrication channel 10. Preferably, the lubrication channel 10 extends radially along the second shaft 14. One end of the lubrication channel 10 is connected to the second shaft oil inlet cavity 9, and the other end of the lubrication channel 10 is positioned directly opposite the needle roller bearing 11, thereby enabling the supply of lubricating oil to the needle roller bearing 11 for lubrication.

[0051] Preferably, the dual shaft oil inlet pipe 8, as well as the aforementioned brake oil inlet pipe 2 and lubrication oil inlet pipe 5, are all steel pipes.

[0052] More preferably, the number of needle roller bearings 11 is at least one, and each needle roller bearing 11 is provided with at least one lubrication channel 10.

[0053] Furthermore, the oil circuit structure of the PTO transmission box of this tractor also includes a fixing component 12, which can be a screw. The end of the second shaft oil inlet pipe 8 used to connect with the second shaft oil inlet chamber 9 is press-fitted to the second shaft oil inlet chamber 9 by a screw.

[0054] Furthermore, the oil circuit structure of the PTO transmission box of this tractor also includes a second seal 13, which is specifically an O-ring. The second seal 13 is sleeved on the second shaft oil inlet pipe 8 and is located between the inlet of the second shaft oil inlet pipe 8 and the inlet of the second shaft oil inlet chamber 9, so as to seal the connection between the second shaft oil inlet pipe 8 and the second shaft oil inlet chamber 9 and prevent leakage.

[0055] In summary, the tractor PTO transmission oil circuit structure provided in this embodiment can realize two oil supply circuits: brake oil and lubricating oil. In terms of lubrication, through the reasonable layout of the pipeline, it can achieve flow diversion and supply lubricating oil to different locations. While meeting the braking and lubrication functions, it can effectively avoid the pipeline layout being too complicated, thus avoiding the messy distribution of pipelines that would occupy too much assembly space and affect aesthetics.

[0056] The embodiments of this application also provide a tractor, including the tractor PTO transmission oil circuit structure described in any of the above embodiments, and thus have all the beneficial technical effects of the tractor PTO transmission oil circuit structure, which will not be repeated here.

[0057] The above-mentioned PTO transmission oil circuit structure of the tractor makes the braking and lubrication oil circuit 400 of the transmission assembly 100 simpler, thereby effectively reducing the installation space occupied by the transmission assembly 100 on this tractor. The pipeline layout is simple and beautiful, and it is also convenient for later inspection and maintenance.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic circuit structure for a tractor PTO transmission box, characterized in that, include: Transmission gearbox assembly; A brake clutch assembly, wherein the brake clutch assembly is disposed in the transmission housing assembly; The transmission assembly includes a brake oil inlet chamber, and the brake oil circuit is connected to the brake oil inlet chamber. The brake clutch assembly includes a brake chamber, and the brake oil inlet chamber is connected to the brake chamber; The transmission assembly includes a lubrication inlet chamber, and the lubrication circuit is connected to the lubrication inlet chamber. The lubrication inlet chamber is mentioned above, and the brake clutch assembly also includes a lubrication chamber. The lubrication inlet chamber is connected to the lubrication chamber and is also connected to a designated lubrication component.

2. The oil circuit structure of the tractor PTO transmission box according to claim 1, characterized in that, The brake fluid circuit includes: A brake oil inlet pipe, which is connected to the brake oil inlet chamber; The control valve includes the brake inlet chamber and the return chamber, which is connected to the brake chamber.

3. The oil circuit structure of the tractor PTO transmission box according to claim 2, characterized in that, The control valve is a two-position three-way solenoid valve. When the two-position three-way solenoid valve is energized, the brake oil inlet chamber is connected to the brake chamber. When the two-position three-way solenoid valve is de-energized, the brake chamber is connected to the return oil chamber.

4. The oil circuit structure of the tractor PTO transmission box according to claim 2, characterized in that, The brake oil circuit also includes a first seal, which is disposed between the brake oil inlet pipe and the brake oil inlet chamber.

5. The oil circuit structure of the tractor PTO transmission box according to claim 1, characterized in that, The lubrication circuit includes a lubrication inlet pipe, the transmission box assembly includes a first lubrication inlet chamber, and the lubrication inlet pipe is connected to the first lubrication inlet chamber; the brake clutch assembly includes a lubrication chamber, and the first lubrication inlet chamber is connected to the lubrication chamber.

6. The oil circuit structure of the tractor PTO transmission box according to claim 5, characterized in that, The lubrication circuit also includes: The oil inlet chamber of the dual-axis lubrication tube is connected to the first lubrication oil inlet chamber; A dual-axis oil inlet pipe, one end of which is connected to the oil inlet chamber of the dual-axis lubrication pipe; The transmission box assembly includes two shafts, each with its own oil inlet chamber. The other end of the oil inlet pipe is connected to the oil inlet chamber.

7. The oil circuit structure of the tractor PTO transmission box according to claim 6, characterized in that, The designated lubrication component is a needle roller bearing, which is sleeved on the two shafts. The oil inlet chamber of the two shafts is provided with a lubrication channel, which is positioned directly opposite the needle roller bearing.

8. The oil circuit structure of the tractor PTO transmission box according to claim 5, characterized in that, The oil circuit structure of the tractor PTO transmission box also includes a second seal, which is disposed between the lubrication inlet pipe and the first lubrication inlet chamber.

9. The oil circuit structure of the tractor PTO transmission box according to claim 6, characterized in that, The oil circuit structure of the tractor PTO transmission box also includes a fixing component, and the oil inlet pipe of the second shaft is fixed to the oil inlet chamber of the second shaft through the fixing component.

10. A tractor, characterized in that, The tractor PTO transmission oil circuit structure includes any one of claims 1 to 9.

Images