Gearbox assembly with novel oil circuit structure

Abstract

The utility model discloses a transmission assembly with novel oil way structure, transmission assembly includes: first casing, install the hydraulic torque converter in first casing, for connecting the power input from engine, the first casing is opened with first oil inlet and first oil outlet with first oil inlet intercommunication of hydraulic torque converter, second casing is connected with first casing, install transmission gear group in second casing, transmission gear group is connected with the drive of hydraulic torque converter, transmission gear group is away from the one end of hydraulic torque converter and is the power output end of transmission assembly, second casing has the open type oil storage cavity below transmission gear group, still open with second oil inlet with first oil inlet intercommunication in second casing.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and in particular to a transmission assembly with a novel oil circuit structure. Background Technology

[0002] In existing transmission assemblies, the hydraulic connections of core components such as the torque converter and gear sets largely rely on external pipelines, resulting in a dispersed and complex pipeline layout. The lack of integrated design between the oil inlet and outlet paths and the housing, coupled with numerous exposed pipelines, not only increases the overall size of the transmission, hindering a compact layout, but also easily leads to installation interference due to pipeline crisscrossing. Furthermore, functions such as lubricant filtration, cooling, lubrication, and pressure relief often require separate devices. The connection between these devices and the hydraulic system further exacerbates the loose structure, occupying more space and potentially reducing sealing performance due to excessive pipeline interfaces, increasing the risk of oil leaks. In addition, the traditional hydraulic system's lubricant circulation path design is inadequate, resulting in low lubrication efficiency for some critical components (such as bearings and output terminals of the gear sets), and the lack of an effective control mechanism for abnormal oil pressure affects the transmission's operational stability and service life. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems by providing a gearbox assembly with a novel oil circuit structure.

[0004] The technical solution of this utility model is implemented as follows:

[0005] This utility model provides a transmission assembly with a novel oil circuit structure, the transmission assembly comprising:

[0006] A first housing, in which a hydraulic torque converter is installed for connecting to the power input from the engine, and a first oil inlet passage and a first oil outlet passage connected to the hydraulic torque converter are provided in the first housing;

[0007] The second housing is connected to the first housing. A gear set is installed inside the second housing. The gear set is connected to the hydraulic torque converter. The end of the gear set away from the hydraulic torque converter is the power output end of the gearbox assembly. The second housing has an open oil reservoir below the gear set. The second housing also has a second oil inlet passage that communicates with the first oil inlet passage.

[0008] An oil pump is installed on the second housing. The oil pump delivers the lubricating oil in the oil storage chamber to the second oil inlet through an oil pipe, so that the lubricating oil enters the first oil inlet through the second oil inlet. Then, the lubricating oil enters the hydraulic torque converter through the first oil inlet. By rotating the hydraulic torque converter, the oil is thrown out from the first oil outlet.

[0009] The first housing is also provided with a third oil inlet. The lubricating oil thrown out from the first oil outlet enters the radiator for heat dissipation, and then enters the gear set through the third oil inlet. The rotation of the gear set throws the lubricating oil into the oil storage chamber below.

[0010] The gearbox assembly further includes a lubrication line installed on the second housing, wherein the oil inlet of the lubrication line is connected to the third oil inlet, and the oil outlet is connected to the upper end of the second housing and the portion of the second housing near the power output end.

[0011] As a further improvement to the above technical solution:

[0012] The side wall of the second housing is also provided with an oil outlet filter channel and an oil inlet filter channel;

[0013] The oil outlet filter channel is connected to the oil pump, which pumps lubricating oil into the oil outlet filter channel. The lubricating oil is then transported to the filter through the oil outlet filter channel.

[0014] The oil inlet filter channel is connected to the second oil inlet path, and the filter delivers the filtered lubricating oil to the second oil inlet path through the oil inlet filter channel.

[0015] The advantages or beneficial effects of the above technical solutions include at least the following:

[0016] 1. By directly opening built-in channels such as the first oil inlet, second oil inlet, first oil outlet, and third oil inlet within the first and second housings, the use of external pipelines is reduced, making the oil circuit system and housing an integrated structure. This significantly optimizes the internal space layout of the gearbox, achieves a compact design of the overall structure, and reduces the installation space requirements.

[0017] 2. The lubricating oil circulation path is reasonably designed. Through the power drive of the hydraulic torque converter and the centrifugal force of the gear set, the lubricating oil can flow efficiently through each key component, ensuring that the hydraulic torque converter, gear set bearings, output end and other parts can be fully lubricated, reducing component wear and extending service life.

[0018] 3. The pressure relief valve can release excess lubricating oil in time when the oil pressure is too high, avoiding damage to the oil circuit system due to abnormal pressure; the integrated filter effectively removes impurities in the lubricating oil, reducing the risk of component jamming; the heat dissipation function prevents the lubricating oil from deteriorating due to high temperature, ensuring the stable operation of the gearbox assembly. Attached Figure Description

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0020] Figure 1 A first structural schematic diagram of the gearbox assembly according to an embodiment of the present invention is shown;

[0021] Figure 2 The diagram shows a first cross-sectional view of the gearbox assembly according to an embodiment of the present invention. The brown lines represent unfiltered lubricating oil, the green lines represent filtered lubricating oil, the arrows indicate the flow direction, and the lower right corner indicates the location of the cross-section.

[0022] Figure 3 The diagram shows a first oil inlet and a first oil outlet inside the first housing of this utility model embodiment. The green line represents the filtered lubricating oil entering the hydraulic torque converter, the red line represents the lubricating oil flowing out of the hydraulic torque converter, and the arrow indicates the flow direction.

[0023] Figure 4 The diagram shows a second cross-sectional view of the gearbox assembly according to an embodiment of the present invention. The red lines represent the lubricating oil flowing out of the hydraulic torque converter, the arrows indicate the flow direction, and the lower right corner indicates the position of the cross-section.

[0024] Figure 5 A schematic diagram of the pressure relief valve according to an embodiment of the present invention is shown;

[0025] Figure 6 The diagram shows a second structural schematic of the gearbox assembly according to an embodiment of the present invention, indicating the position of the oil pump. In the diagram, the red line represents the lubricating oil before cooling, the blue line represents the lubricating oil after cooling, and the arrows indicate the flow direction.

[0026] Figure 7 A cross-sectional schematic diagram of the first housing according to an embodiment of the present invention is shown. The blue lines represent the lubricating oil after cooling, the arrows indicate the flow direction, and the lower right corner indicates the location of the cross-section.

[0027] Figure 8 A schematic diagram of the lubrication pipeline according to an embodiment of the present invention is shown, wherein the yellow highlighted area indicates the location of the lubrication pipeline;

[0028] Figure 9 The diagram shows the flow of cooled lubricating oil into the oil channel according to an embodiment of the present invention. The blue lines represent the cooled lubricating oil, and the arrows indicate the flow direction.

[0029] Figure 10A cross-sectional schematic diagram of the gearbox assembly according to an embodiment of the present invention is shown. The blue lines represent the cooled lubricating oil, and the arrows indicate the flow direction. It can be seen from the diagram that the lubricating oil flows from the gear set to the oil reservoir.

[0030] Figure 11 A schematic diagram of the oil inlet channel and oil outlet hole of an embodiment of the present invention is shown;

[0031] Figure 12 A cross-sectional schematic diagram of the second housing according to an embodiment of the present invention is shown;

[0032] Figure 13 A schematic diagram showing the location of the oil leakage hole in an embodiment of this utility model is provided.

[0033] Reference numerals: 10, First housing; 11, Hydraulic torque converter; 12, Pressure relief valve; 121, Piston rod; 122, Conical plug; 123, Spring; 101, First oil inlet; 102, First oil outlet; 103, Third oil inlet; 20, Second housing; 21, Transmission gear set; 211, Oil inlet channel; 212, Oil outlet hole; 22, Oil reservoir; 23, Transmission valve; 24, Oil leakage hole; 201, Second oil inlet; 202, Oil outlet filter channel; 203, Oil inlet filter channel; 30, Oil pump; 31, Oil pipe; 40, Lubrication pipeline; Detailed Implementation

[0034] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0035] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0037] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0038] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0039] Reference Figure 1 A transmission assembly with a novel oil circuit structure, the transmission assembly comprising:

[0040] The gearbox assembly consists of two parts: a first housing 10 and a second housing 20. The first housing 10 houses a hydraulic torque converter 11 for connecting to the power input from the engine. The second housing 20 houses a transmission gear set 21, which is connected to the hydraulic torque converter 11. The end of the transmission gear set 21 away from the hydraulic torque converter 11 is the power output end of the gearbox assembly.

[0041] A first oil inlet passage 101 and a first oil outlet passage 102 connected to the hydraulic torque converter 11 are provided in the first housing 10, and a second oil inlet passage 201 connected to the first oil inlet passage 101 is also provided in the second housing 20.

[0042] Furthermore, the second housing 20 has an open oil reservoir 22 located below the transmission gear set 21.

[0043] The transmission assembly further includes: an oil pump 30, mounted on the second housing 20, which delivers lubricating oil from the oil reservoir 22 to the second oil inlet 201 via an oil pipe 31, allowing the lubricating oil to enter the first oil inlet 101 through the second oil inlet 201, and then the lubricating oil to enter the torque converter 11 through the first oil inlet 101. The rotation of the torque converter 11 causes the oil to be thrown out from the first oil outlet 102.

[0044] Based on the further improvement of the above structure, an oil outlet filter channel 202 and an oil inlet filter channel 203 are also provided on the side wall of the second housing 20; wherein, the oil outlet filter channel 202 is connected to the oil pump 30, the oil pump 30 pumps lubricating oil into the oil outlet filter channel 202, and the lubricating oil is delivered to the filter through the oil outlet filter channel 202; wherein, the oil inlet filter channel 203 is connected to the second oil inlet passage 201, and the filter delivers the filtered lubricating oil into the second oil inlet passage 201 through the oil inlet filter channel 203;

[0045] like Figure 2 As shown, the second housing 20 has a cavity at the oil inlet filter channel 203, which is connected to the oil pump 30. The oil pump 30 first draws the lubricating oil in the oil storage chamber 22 into the cavity through the oil inlet filter channel 203. The lubricating oil enters the filter through the oil inlet filter channel 203 to filter impurities in the lubricating oil, and then returns to the second housing 20 through the oil outlet filter channel 202. It should be noted that there is a blockage in the middle of the cavity to prevent the oil outlet filter channel 202 and the oil inlet filter channel 203 from communicating with each other.

[0046] Furthermore, the transmission assembly also includes:

[0047] The speed change valve 23 is installed on the outside of the second housing 20. The oil inlet end of the speed change valve 23 is connected to the oil inlet filter channel 203, and the oil outlet end is connected to the second oil inlet passage 201, so that the lubricating oil can enter from the oil inlet filter channel 203 to the speed change valve 23 and then enter the second oil inlet passage 201.

[0048] In summary, the oil pump 30 draws the lubricating oil from the oil storage chamber 22 into the oil inlet filter channel 203 through the oil pipe 31 (e.g., ...). Figure 2 (As shown by the upper brown dotted arrow), the lubricating oil enters the filter through the inlet filter channel 203, where impurities in the lubricating oil are filtered out. It then returns to the outlet filter channel 202, and through the outlet filter channel 202, enters the transmission valve 23 (as shown in the image). Figure 2 As shown by the green dotted arrow in the upper part of the diagram, the color of the lubricating oil line changes from brown to green, indicating that filtration is complete. It then enters the second oil inlet circuit 201 through the transmission valve 23, and from there enters the first oil inlet circuit 101. Figures 2 to 3 As shown, the green dashed arrows indicate the direction of lubricant flow;

[0049] Furthermore, a third oil inlet passage 103 is provided in the first housing 10. The lubricating oil thrown out from the first oil outlet passage 102 enters the radiator for cooling. Specifically, due to the engine input, the torque converter 11 rotates continuously. The torque converter 11 has blades, and its rotation acts like a hydraulic pump, sending lubricating oil from the pump 30 to the first oil outlet passage 102. During this process, the friction between the blades of the torque converter 11 and the lubricating oil causes the lubricating oil temperature to rise. Figure 3 As shown in the diagram (the green dashed arrow represents the oil entering the torque converter 11 through the first oil inlet 101, and the red dashed arrow represents the high-temperature lubricating oil being ejected by the torque converter 11), after cooling, it enters the transmission gear set 21 through the third oil inlet 103. Figure 6 and Figure 7 As shown in the figure (the blue dashed arrows represent the flow direction of the lubricating oil after it has been cooled by the radiator), the rotation of the gear set 21 throws the lubricating oil into the oil reservoir 22 below.

[0050] Specifically, an axially extending oil inlet channel 211 is provided at the center of the main shaft of the gear set 21, and several oil outlet holes 212 are provided on the side wall of the main shaft. The oil outlet holes 212 are connected to the oil inlet channel 211. The oil inlet channel 211 is connected to the third oil inlet passage 103. The lubricating oil enters the oil inlet channel 211 through the third oil inlet passage 103. The centrifugal force generated by the rotation of the gear set 21 throws the lubricating oil out through the oil outlet holes 212. The lubricating oil is thrown through the oil outlet holes 212 to the bearings between the gear sets 21 for lubrication. Finally, it returns to the oil storage chamber 22 through the gap, and so on in a reciprocating cycle.

[0051] The transmission assembly further includes lubrication lines 40, such as Figure 8 As shown (the yellow highlighted area in the figure is the lubrication pipe 40, and the yellow arrows indicate the outlet ends of the lubrication pipe 40, which have two outlets), specifically, the first housing 10 is provided with a three-way valve at the position of the third oil inlet 103. The first end of the three-way valve is connected to the radiator, the second end is connected to the third oil inlet 103, and the third end is connected to the lubrication pipe 31. The lubrication pipe 40 is installed on the second housing 20. The oil inlet end of the lubrication pipe 40 is connected to the third oil inlet 103, and the oil outlet end is connected to the upper end of the second housing 20 and the part of the second housing 20 near the power output end, respectively, for lubricating the output end of the gearbox assembly.

[0052] Based on the further improvement of the above structure, a pressure relief valve 12 is also installed inside the first housing 10. The pressure relief valve 12 is installed on the side wall of the first oil inlet 101 and the third oil inlet 103, and is used to release overpressured lubricating oil.

[0053] Pressure relief valve 12 includes:

[0054] The piston rod 121 is movably installed in the first housing 10. The side walls of the first oil inlet passage 101 and the third oil inlet passage 103 are provided with openings. The end of the piston has a tapered block 122 for blocking or clearing the openings.

[0055] Spring 123 is sleeved on piston rod 121. One end of spring 123 abuts against conical block 122, and the other end abuts against inner wall of first housing 10.

[0056] When the oil pressure is too high, the lubricating oil resists the thrust from the spring 123 and pushes the conical block 122 through the opening. As the piston rod 121 moves, a gap is formed between the conical block 122 and the opening, allowing the oil passage to connect with the oil reservoir 22, and letting excess lubricating oil flow into the oil reservoir 22. Figure 12 and Figure 13 As shown, the second housing 20 has oil leakage holes 24 below the pressure relief valve 12 and below the gear set 21, so that lubricating oil flows into the oil storage chamber 22.

[0057] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0058] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A transmission assembly with a novel oil circuit structure, characterized in that: The transmission assembly includes: A first housing (10) is provided, in which a hydraulic torque converter (11) is installed for connecting to the power input from the engine. A first oil inlet passage (101) and a first oil outlet passage (102) communicating with the hydraulic torque converter (11) are provided in the first housing (10). The second housing (20) is connected to the first housing (10). A gear set (21) is installed inside the second housing (20). The gear set (21) is connected to the hydraulic torque converter (11). The end of the gear set (21) away from the hydraulic torque converter (11) is the power output end of the gearbox assembly. The second housing (20) has an open oil reservoir (22) below the gear set (21). The second housing (20) also has a second oil inlet (201) connected to the first oil inlet (101). An oil pump (30) is installed on the second housing (20). The oil pump (30) delivers the lubricating oil in the oil storage chamber (22) to the second oil inlet (201) through the oil pipe (31), so that the lubricating oil enters the first oil inlet (101) through the second oil inlet (201), and then the lubricating oil enters the hydraulic torque converter (11) through the first oil inlet (101). Through the rotation of the hydraulic torque converter (11), the oil is thrown out from the first oil outlet (102). The first housing (10) is also provided with a third oil inlet (103). The lubricating oil thrown out from the first oil outlet (102) enters the radiator for heat dissipation, and then enters the gear set (21) through the third oil inlet (103). The rotation of the gear set (21) throws the lubricating oil into the oil storage chamber (22) below. The gearbox assembly further includes a lubrication line (40) mounted on the second housing (20), wherein the oil inlet of the lubrication line (40) is connected to the third oil inlet (103), and the oil outlet is connected to the upper end of the second housing (20) and the portion of the second housing (20) near the power output end.

2. The gearbox assembly with a novel oil circuit structure according to claim 1, characterized in that: The side wall of the second housing (20) is also provided with an oil outlet filter channel (202) and an oil inlet filter channel (203); The oil outlet filter channel (202) is connected to the oil pump (30), and the oil pump (30) pumps lubricating oil into the oil outlet filter channel (202). The lubricating oil is then transported to the filter through the oil outlet filter channel (202). The oil inlet filter channel (203) is connected to the second oil inlet path (201), and the filter delivers the filtered lubricating oil to the second oil inlet path (201) through the oil inlet filter channel (203).

3. The gearbox assembly with a novel oil circuit structure according to claim 2, characterized in that: The transmission assembly further includes: The speed change valve (23) is installed on the outside of the second housing (20). The oil inlet end of the speed change valve (23) is connected to the oil inlet filter channel (203), and the oil outlet end is connected to the second oil inlet channel (201). This allows lubricating oil to enter from the oil inlet filter channel (203) and then from the speed change valve (23) into the second oil inlet path (201).

4. The gearbox assembly with a novel oil circuit structure according to claim 1, characterized in that: The first housing (10) is also equipped with a pressure relief valve (12), which is installed on the side wall of the first oil inlet (101) and the third oil inlet (103).

5. The gearbox assembly with a novel oil circuit structure according to claim 4, characterized in that: The pressure relief valve (12) includes: The piston rod (121) is movably installed in the first housing (10). The side walls of the first oil inlet passage (101) and the third oil inlet passage (103) are provided with openings. The end of the piston has a tapered block (122) for blocking or passing through the openings. A spring (123) is sleeved on the piston rod (121). One end of the spring (123) abuts against the conical block (122), and the other end abuts against the inner wall of the first housing (10). As the piston rod (121) moves, a gap is formed between the conical plug (122) and the opening, so that the oil passage is connected to the oil storage chamber (22).

6. The gearbox assembly with a novel oil circuit structure according to claim 1, characterized in that: The main shaft of the gear set (21) has an axially extending oil inlet channel (211) at its center, and the side wall of the main shaft has a plurality of oil outlet holes (212), which are connected to the oil inlet channel (211). The oil inlet channel (211) is connected to the third oil inlet channel (103).

Images