Gearbox and vehicle

Abstract

The utility model discloses a gearbox and vehicle relates to gearbox lubrication technical field. The gearbox includes: casing, transmission, and transmission is located at casing, drive pump, oil injection pipe, intercommunication oil pipe, drive pump, oil injection pipe, intercommunication oil pipe all are located at casing, and intercommunication oil pipe is connected between drive pump and oil injection pipe, and oil injection pipe forms and has the oil hole, and the oil hole is to transmission. Therefore, through setting up oil injection pipe, can directly inject lubricating oil to transmission through oil injection pipe, like this can play excellent lubrication and cooling effect, and will not increase transmission device agitating's energy loss, can make gearbox have better transmission efficiency, and, through setting up intercommunication oil pipe, compared with the technical scheme of directly forming the oil channel on the casing, can greatly reduce the arrangement difficulty of gearbox's lubrication system, and can directly pump lubricating oil to oil injection pipe through intercommunication oil pipe, and the path is short, and the pressure loss is little, is favorable to improving lubrication effect.

Description

Technical Field

[0001] This utility model relates to the field of gearbox lubrication technology, and in particular to a gearbox and a vehicle. Background Technology

[0002] In related technologies, the transmission, as a core component of a vehicle's powertrain system, contains multiple meshing gears and bearings, among other moving parts. These components generate a significant amount of heat during high-speed operation, accompanied by friction and wear. To ensure the normal operation of the transmission, a lubrication system is typically installed inside. This lubricant lubricates and cools the various components, thereby reducing friction, extending service life, and dissipating the heat generated during operation.

[0003] The most common lubrication method in transmissions is splash lubrication, which utilizes the lubricating oil (or gear oil) carried up by the high-speed rotation of gears to form an oil mist or flow that splashes directly onto the bearing working surfaces to achieve lubrication. However, splash lubrication alone is unlikely to achieve effective lubrication. Existing solutions improve splash lubrication performance by increasing the lubricating oil level, but this leads to significant energy loss due to turbulence, affecting the transmission efficiency of the transmission. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a gearbox that can directly spray lubricating oil to the transmission device through an oil injection pipe, thereby achieving excellent lubrication and cooling effects.

[0005] This utility model further proposes a vehicle.

[0006] The gearbox according to this utility model includes: a housing, a transmission device, the transmission device being disposed in the housing; a drive pump, an injection pipe, and a connecting oil pipe, the drive pump, the injection pipe, and the connecting oil pipe all being disposed in the housing, the connecting oil pipe connecting the drive pump and the injection pipe, the injection pipe forming an oil outlet hole, the oil outlet hole facing the transmission device.

[0007] According to the present invention, the gearbox can directly spray lubricating oil to the transmission device by setting an oil injection pipe. This can achieve excellent lubrication and cooling effects without increasing the energy loss of the transmission device. It can make the gearbox have better transmission efficiency. Moreover, by setting a connecting oil pipe, compared with the technical solution of directly forming oil passages on the housing, the layout difficulty of the gearbox lubrication system can be greatly reduced. Furthermore, the lubricating oil can be directly pumped to the injection pipe through the connecting oil pipe, with a short path and low pressure loss, which is conducive to improving the lubrication effect.

[0008] In some examples of this utility model, there are multiple fuel injection pipes and multiple connecting oil pipes, and the multiple fuel injection pipes and multiple connecting oil pipes correspond one-to-one.

[0009] In some examples of this utility model, the transmission device includes: a one-axis transmission mechanism and a two-axis transmission mechanism, the one-axis transmission mechanism and the two-axis transmission mechanism being connected in transmission; the housing forming a two-axis bearing mounting groove; the plurality of fuel injection pipes including: a first fuel injection pipe; the plurality of connecting oil pipes including: a first connecting oil pipe; the first connecting oil pipe connecting between the drive pump and the two-axis bearing mounting groove; the first fuel injection pipe being disposed in and connected to the two-axis bearing mounting groove; and the first fuel injection pipe passing through the two-axis transmission mechanism.

[0010] In some examples of this utility model, the dual-shaft bearing mounting groove forms a first connecting channel, which connects the first connecting oil pipe and the first injection pipe.

[0011] In some examples of this utility model, the housing forms a second connecting channel, the plurality of fuel injection pipes include a second fuel injection pipe, the plurality of connecting oil pipes include a second connecting oil pipe, and the second connecting channel connects the second connecting oil pipe and the second fuel injection pipe.

[0012] In some examples of this utility model, the housing further forms a first-shaft bearing mounting groove, the second fuel injection pipe is located outside the first-shaft bearing mounting groove, a portion of the oil outlet of the second fuel injection pipe faces the first-shaft transmission mechanism, and a portion of the oil outlet of the second fuel injection pipe faces the second-shaft transmission mechanism.

[0013] In some examples of this utility model, the drive pump includes: an electronic pump and a mechanical pump, the mechanical pump being connected between the electronic pump and the connecting oil pipe; the transmission device includes: a single-axis transmission mechanism, a double-axis transmission mechanism, and a triple-axis transmission mechanism, the double-axis transmission mechanism being drively connected between the single-axis transmission mechanism and the triple-axis transmission mechanism, and the triple-axis transmission mechanism being drively connected to the mechanical pump.

[0014] In some examples of this utility model, the mechanical pump includes: a housing and a rotor. The housing is disposed within the casing and forms a first oil passage and a second oil passage. The first oil passage is connected to the electronic pump, and the second oil passage is connected to the connecting oil pipe. The rotor is movably disposed within the housing and is connected to the three-axis transmission mechanism.

[0015] In some examples of this utility model, the gearbox further includes: a filter and a one-way pressure relief valve, the filter being connected between the one-way pressure relief valve and the electric pump, the one-way pressure relief valve being configured to conduct unidirectionally from the filter to the mechanical pump, and the one-way pressure relief valve being arranged parallel to the filter.

[0016] The vehicle according to this utility model includes the aforementioned gearbox.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a gearbox according to an embodiment of the present utility model (partial structure omitted); Figure 2 This is a schematic diagram of a gearbox according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the gearbox according to another angle of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the housing of the mechanical pump of the gearbox according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the filter, one-way pressure relief valve, and electronic pump according to an embodiment of the present invention.

[0019] Figure label: Transmission 100; Housing 10; dual-shaft bearing mounting groove 11; first connecting flow channel 111; second connecting flow channel 12; primary-shaft bearing mounting groove 13; oil pipe interface 14; Transmission device 20; One-shaft transmission mechanism 21; Two-shaft transmission mechanism 22; Three-shaft transmission mechanism 23; Drive pump 30; electronic pump 31; mechanical pump 32; housing 321; first oil passage 3211; second oil passage 3212; Fuel injection pipe 40; First fuel injection pipe 41; Second fuel injection pipe 42; Fuel outlet 43; Connecting oil pipe 50; First connecting oil pipe 51; Second connecting oil pipe 52; Filter 60; one-way pressure relief valve 61; single-pipe clamp 62. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] The following is for reference. Figures 1-5 The present invention describes a vehicle transmission 100 according to an embodiment of the present invention.

[0022] like Figures 1-5 As shown, the gearbox 100 according to an embodiment of the present utility model includes: a housing 10, a transmission device 20, a drive pump 30, an oil injection pipe 40, and a connecting oil pipe 50.

[0023] The transmission device 20 is disposed in the housing 10. As in some embodiments of this application, at least a portion of the structure of the transmission device 20 is housed within the housing 10. The transmission device 20 can transmit power from the engine and / or drive motor to the wheel ends.

[0024] The drive pump 30, the fuel injection pipe 40, and the connecting oil pipe 50 are all located in the housing 10. As some embodiments of this application, the drive pump 30 can be installed in the housing 10 by means of bolt connection, snap-fit, etc. The fuel injection pipe 40 can be installed in the housing 10 by means of bolt connection, snap-fit, etc. The connecting oil pipe 50 connects the drive pump 30 and the fuel injection pipe 40. The connecting oil pipe 50 can be fixed by a single pipe clamp 62. The single pipe clamp 62 can be installed in the housing 10 by means of bolt connection, snap-fit, etc. The fuel injection pipe 40 has an oil outlet hole 43, which faces the transmission device 20.

[0025] The drive pump 30 can be connected to a storage container containing lubricating oil. When the drive pump 30 is working, it pumps the lubricating oil in the storage container into the connecting oil pipe 50. The lubricating oil flows through the connecting oil pipe 50 to the oil injection pipe 40, and then is sprayed out through the oil outlet 43 of the oil injection pipe 40. Since the oil outlet 43 faces the transmission device 20, the lubricating oil sprayed from the oil outlet 43 can be directly sprayed onto the transmission device 20, which can achieve better lubrication and cooling effects. As some embodiments of this application, oil enters at one end of the fuel injection pipe 40, and the fuel injection pipe 40 forms a plurality of oil outlet holes 43. The plurality of oil outlet holes 43 can be arranged at intervals along the length direction of the fuel injection pipe 40, or the plurality of oil outlet holes 43 can be arranged at intervals along the circumferential direction of the fuel injection pipe 40, or the plurality of oil outlet holes 43 can be constructed as multiple sets of holes, each set including a plurality of oil outlet holes 43. The plurality of oil outlet holes 43 in one set of holes are arranged at intervals along the circumferential direction of the fuel injection pipe 40, and the multiple sets of holes are arranged at intervals along the length direction of the fuel injection pipe 40. This arrangement allows lubricating oil to be sprayed towards multiple positions of the transmission device 20, achieving excellent lubrication and cooling effects. As some embodiments of this application, oil enters at one end of the fuel injection pipe 40, and an oil outlet hole 43 is formed at the other end of the fuel injection pipe 40.

[0026] It should be noted that by setting up the injection pipe 40, this application can directly pump lubricating oil into the injection pipe 40 and then directly spray it onto the transmission device 20. This achieves excellent lubrication and cooling effects without increasing the lubricating oil level, thus avoiding increased energy loss from churning in the transmission device 20 and enabling the gearbox 100 to have better transmission efficiency. Furthermore, this application connects the drive pump 30 and the injection pipe 40 via a connecting oil pipe 50. This connecting oil pipe 50 is an independent oil pipe, not an oil passage directly formed on the housing 10. By setting up the connecting oil pipe 50, the layout difficulty of the lubrication system of the gearbox 100 can be greatly reduced. Moreover, by setting up the connecting oil pipe 50, lubricating oil can be directly pumped to the injection pipe 40, shortening the total flow path of the lubricating oil, reducing pressure loss, and thus improving the lubrication effect.

[0027] It should be emphasized that the technical solution proposed in this application does not exclude splash lubrication. The technical solution proposed in this application can be understood as active lubrication. Active lubrication can be used in conjunction with splash lubrication to greatly improve the lubrication and cooling effect.

[0028] Therefore, by setting up the oil injection pipe 40, lubricating oil can be directly sprayed to the transmission device 20 through the oil injection pipe 40, which can achieve excellent lubrication and cooling effects without increasing the energy loss of the transmission device 20. This can give the gearbox 100 better transmission efficiency. Moreover, by setting up the connecting oil pipe 50, compared with the technical solution of directly forming oil passages on the housing 10, the layout difficulty of the lubrication system of the gearbox 100 can be greatly reduced. Furthermore, the lubricating oil can be directly pumped to the oil injection pipe 40 through the connecting oil pipe 50, with a short path and low pressure loss, which is conducive to improving the lubrication effect.

[0029] In some embodiments of this utility model, such as Figure 1 As shown, there are multiple fuel injection pipes 40 and multiple connecting fuel pipes 50, and the multiple fuel injection pipes 40 and multiple connecting fuel pipes 50 correspond one-to-one.

[0030] The number of fuel injection pipes 40 can be, but is not limited to, two or three, and the number of connecting oil pipes 50 can be, but is not limited to, two or three. The number of fuel injection pipes 40 is the same as the number of connecting oil pipes 50, and multiple fuel injection pipes 40 and multiple connecting oil pipes 50 correspond one-to-one, that is, each connecting oil pipe 50 is connected between the drive pump 30 and the corresponding fuel injection pipe 40.

[0031] As an embodiment of this application, there are two fuel injection pipes 40, namely a first fuel injection pipe 41 and a second fuel injection pipe 42. There are also two connecting oil pipes 50, namely a first connecting oil pipe 51 and a second connecting oil pipe 52. The first connecting oil pipe 51 is connected between the drive pump 30 and the first fuel injection pipe 41, and the second connecting oil pipe 52 is connected between the drive pump 30 and the second fuel injection pipe 42.

[0032] By setting multiple oil injection pipes 40 and connecting oil pipes 50 and making each of the multiple oil injection pipes 40 and multiple connecting oil pipes 50 correspond one-to-one, lubricating oil can be sprayed towards the transmission device 20 through multiple oil injection pipes 40, which is beneficial to ensure that all parts of the transmission device 20 are adequately lubricated and cooled, and to improve the lubrication and cooling effects.

[0033] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the transmission device 20 includes: a primary shaft transmission mechanism 21 and a secondary shaft transmission mechanism 22. The primary shaft transmission mechanism 21 and the secondary shaft transmission mechanism 22 are connected in a transmission manner. The housing 10 has a secondary shaft bearing mounting groove 11. At least a portion of the bearing at one end of the secondary shaft transmission mechanism 22 is disposed in the secondary shaft bearing mounting groove 11.

[0034] The primary shaft transmission mechanism 21 and the secondary shaft transmission mechanism 22 are connected by gear meshing. The engine and / or drive motor can be connected to the primary shaft transmission mechanism 21. The power output by the engine and / or drive motor can be transmitted from the primary shaft transmission mechanism 21 to the secondary shaft transmission mechanism 22, and then directly or through other transmission mechanisms to the wheel end. The housing 10 has a secondary shaft bearing mounting groove 11. At least a portion of the bearing at one end of the secondary shaft transmission mechanism 22 is disposed in the secondary shaft bearing mounting groove 11. That is, a portion of the bearing at one end is disposed in the secondary shaft bearing mounting groove 11, or all of the bearing at one end is disposed in the secondary shaft bearing mounting groove 11.

[0035] The plurality of fuel injection pipes 40 include: a first fuel injection pipe 41, and the plurality of connecting oil pipes 50 include: a first connecting oil pipe 51, the first connecting oil pipe 51 being connected between the drive pump 30 and the dual shaft bearing mounting groove 11, the first fuel injection pipe 41 being disposed in the dual shaft bearing mounting groove 11 and being connected to the dual shaft bearing mounting groove 11, and the first fuel injection pipe 41 being inserted through the dual shaft transmission mechanism 22.

[0036] Among them, such as Figure 1 As shown, the first connecting oil pipe 51 can be fixed by a single pipe clamp 62. The single pipe clamp 62 can be installed on the housing 10 by bolt connection, snap-fit, or other means to ensure that the first connecting oil pipe 51 is firmly installed on the housing 10, reducing the risk of the first connecting oil pipe 51 moving or falling off. When the drive pump 30 is working, the drive pump 30 can pump the lubricating oil in the storage container into the first connecting oil pipe 51. The lubricating oil flows through the first connecting oil pipe 51 to the dual shaft bearing mounting groove 11, and then flows to the first oil injection pipe 41.

[0037] The first fuel injection pipe 41 passes through the two-axis transmission mechanism 22. In some embodiments of this application, the central axis of the first fuel injection pipe 41 is collinear with the central axis of the two-axis transmission mechanism 22. In some embodiments of this application, all components of the two-axis transmission mechanism 22 are provided with clearance holes. Multiple clearance holes are aligned along the central axis of the two-axis transmission mechanism 22, and the first fuel injection pipe 41 can pass through multiple clearance holes so that the first fuel injection pipe 41 passes through the two-axis transmission mechanism 22.

[0038] The first oil injection pipe 41 has multiple oil outlet holes 43. As some embodiments of this application, oil enters at one end of the first oil injection pipe 41, and oil outlet holes 43 are formed at both ends of the first oil injection pipe 41, with multiple oil outlet holes 43 formed between the two ends of the first oil injection pipe 41. This configuration allows lubricating oil to be directly sprayed to the needle roller bearing of the two-axis transmission mechanism 22, and also allows lubricating oil to be directly sprayed to the bearings at both ends of the two-axis transmission mechanism 22, thereby achieving excellent lubrication and cooling effects.

[0039] In some embodiments of this utility model, such as Figure 1 As shown, the dual-shaft bearing mounting groove 11 has a first connecting flow channel 111, which connects the first connecting oil pipe 51 and the first oil injection pipe 41. It can be understood that when the drive pump 30 operates, it pumps lubricating oil from the storage container into the first connecting oil pipe 51. The lubricating oil flows through the first connecting oil pipe 51 to the first connecting flow channel 111, and then through the first connecting flow channel 111 to the first oil injection pipe 41. By forming the first connecting flow channel 111, the first connecting oil pipe 51 and the first oil injection pipe 41 can be easily connected. Furthermore, by forming the first connecting flow channel 111 in the dual-shaft bearing mounting groove 11, the lubricating oil can flow to the first oil injection pipe 41 passing through the dual-shaft transmission mechanism 22 via a shorter path. This shorter path and lower pressure loss improve lubrication performance.

[0040] In some embodiments of this utility model, such as Figure 1 As shown, the housing 10 has a second connecting channel 12, and the plurality of fuel injection pipes 40 include a second fuel injection pipe 42, and the plurality of connecting oil pipes 50 include a second connecting oil pipe 52. The second connecting channel 12 connects the second connecting oil pipe 52 and the second fuel injection pipe 42.

[0041] The second connecting oil pipe 52 can be fixed by a single pipe clamp 62, which can be installed on the housing 10 by bolts, snap-fit, or other means to ensure that the second connecting oil pipe 52 is firmly installed on the housing 10 and reduce the risk of the second connecting oil pipe 52 shifting or falling off. The housing 10 has a second connecting flow channel 12, which connects the second connecting oil pipe 52 and the second oil injection pipe 42. When the drive pump 30 is working, the drive pump 30 can pump the lubricating oil in the storage container into the second connecting oil pipe 52. The lubricating oil flows through the second connecting oil pipe 52 to the second connecting flow channel 12, and then flows to the second oil injection pipe 42, and is sprayed onto the transmission device 20 through the second oil injection pipe 42 to achieve active lubrication of the transmission device 20.

[0042] This design enables active lubrication of the transmission device 20, featuring a compact and rational structure that improves lubrication and cooling performance. Furthermore, by providing the second connecting channel 12, the second connecting oil pipe 52 can be easily connected to the second oil injection pipe 42, allowing lubricating oil to flow to the second oil injection pipe 42 via a shorter path. This shorter path and lower pressure loss further enhance lubrication.

[0043] In some embodiments of this utility model, such as Figure 1As shown, the housing 10 also forms a shaft bearing mounting groove 13. At least a portion of the bearing at one end of the shaft transmission mechanism 21 is disposed within the shaft bearing mounting groove 13. That is, a portion of the bearing at one end is disposed within the shaft bearing mounting groove 13, or the entire bearing at one end is disposed within the shaft bearing mounting groove 13. The second fuel injection pipe 42 is located outside the shaft bearing mounting groove 13. In other words, along the central axis direction of the second fuel injection pipe 42, the orthographic projection of the second fuel injection pipe 42 and the orthographic projection of the shaft bearing mounting groove 13 do not overlap.

[0044] Part of the oil outlet holes 43 of the second fuel injection pipe 42 face the primary shaft transmission mechanism 21, and part of the oil outlet holes 43 of the second fuel injection pipe 42 face the secondary shaft transmission mechanism 22. As some embodiments of this application, one end of the second fuel injection pipe 42 is inlet for oil, and the second fuel injection pipe 42 is formed with a plurality of oil outlet holes 43, wherein part of the oil outlet holes 43 faces the primary shaft transmission mechanism 21, and another part of the oil outlet holes 43 faces the secondary shaft transmission mechanism 22.

[0045] Lubricating oil in the second oil injection pipe 42 can be sprayed onto the primary shaft transmission mechanism 21 through the oil outlet 43, thereby actively lubricating the primary shaft transmission mechanism 21. Furthermore, lubricating oil in the second oil injection pipe 42 can be sprayed onto the secondary shaft transmission mechanism 22 through the oil outlet 43. This arrangement allows lubricating oil to be sprayed onto the secondary shaft transmission mechanism 22 from both the inside and outside, significantly improving the lubrication and cooling effect on the secondary shaft transmission mechanism 22.

[0046] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the drive pump 30 includes an electronic pump 31 and a mechanical pump 32. The mechanical pump 32 is connected between the electronic pump 31 and the connecting oil pipe 50. The transmission device 20 includes a single-axis transmission mechanism 21, a double-axis transmission mechanism 22, and a triple-axis transmission mechanism 23. The double-axis transmission mechanism 22 is driven between the single-axis transmission mechanism 21 and the triple-axis transmission mechanism 23. The triple-axis transmission mechanism 23 is driven by the mechanical pump 32.

[0047] Among them, the electronic pump 31 can pump the lubricating oil to the mechanical pump 32, and the mechanical pump 32 can pump the lubricating oil to the connecting oil pipe 50. By making the drive pump 30 include the electronic pump 31 and the mechanical pump 32, the electronic pump 31 and the mechanical pump 32 can complement each other to improve the pumping force of the lubricating oil, so that the lubricating oil can flow more fully into the position that needs lubrication.

[0048] The transmission device 20 includes: a single-shaft transmission mechanism 21, a two-shaft transmission mechanism 22, and a three-shaft transmission mechanism 23. The two-shaft transmission mechanism 22 is driven between the single-shaft transmission mechanism 21 and the three-shaft transmission mechanism 23, and the three-shaft transmission mechanism 23 is driven by the mechanical pump 32. The single-shaft transmission mechanism 21 and the two-shaft transmission mechanism 22 can be driven by gear meshing, and the two-shaft transmission mechanism 22 and the three-shaft transmission mechanism 23 can also be driven by gear meshing. The power output from the engine and / or drive motor can be transmitted from the single-shaft transmission mechanism 21 to the two-shaft transmission mechanism 22, then from the two-shaft transmission mechanism 22 to the three-shaft transmission mechanism 23, and finally from the three-shaft transmission mechanism 23 directly or through other transmission mechanisms to the wheel ends.

[0049] The three-axis transmission mechanism 23 is connected to the mechanical pump 32. In other words, the force for the mechanical pump 32 to pump lubricating oil can be provided by the three-axis transmission mechanism 23, or the force for the mechanical pump 32 to pump lubricating oil can be provided by the engine or drive motor. This configuration can save on the number of motors used and reduce costs.

[0050] In some embodiments of this utility model, such as Figure 4 As shown, the mechanical pump 32 includes: a housing 321 and a rotor. The housing 321 is disposed in the housing 10 and forms a first oil passage 3211 and a second oil passage 3212. The first oil passage 3211 is connected to the electronic pump 31, and the second oil passage 3212 is connected to the connecting oil pipe 50. The rotor is movably disposed in the housing 321 and is connected to the three-axis transmission mechanism 23 for transmission.

[0051] The outer casing 321 is attached to the housing 10 by means of bolts, snap-fit, welding, etc. The outer casing 321 forms a first oil passage 3211 and a second oil passage 3212. The first oil passage 3211 is connected to the electronic pump 31, and the second oil passage 3212 is connected to the connecting oil pipe 50. The electronic pump 31 can pump lubricating oil to the first oil passage 3211. The rotor and the three-axis transmission mechanism 23 can be connected by means of splines, couplings, etc. The pressure difference generated after the rotor rotates can pump the lubricating oil in the first oil passage 3211 into the second oil passage 3212, and this can pump more lubricating oil to the second oil passage 3212, which is beneficial to improving the lubrication effect.

[0052] As some embodiments of this application, such as Figure 1 As shown, the housing 10 has multiple connecting flow paths, all of which are connected to the second oil passage 3212. Each connecting flow path has an oil pipe interface 14 at the end away from the second oil passage 3212, and each oil pipe interface 14 is used to connect with the connecting oil pipe 50.

[0053] In some embodiments of this utility model, such as Figure 5As shown, the gearbox 100 also includes: a filter 60 and a one-way pressure relief valve 61. The filter 60 is connected between the one-way pressure relief valve 61 and the electric pump 31. The one-way pressure relief valve 61 is configured to conduct unidirectionally from the filter 60 to the mechanical pump 32. The one-way pressure relief valve 61 and the filter 60 are arranged in parallel.

[0054] In this system, under the action of the electronic pump 31, lubricating oil can flow sequentially through the filter 60, the one-way pressure relief valve 61, and the mechanical pump 32. The filter 60 can filter the lubricating oil flowing through it to improve its cleanliness. The one-way pressure relief valve 61 is configured to conduct in one direction from the filter 60 to the mechanical pump 32. That is, lubricating oil can flow from the filter 60 to the mechanical pump 32, but it cannot flow from the mechanical pump 32 to the filter 60. By setting the one-way pressure relief valve 61, when the filter screen of the filter 60 becomes clogged after long-term use, the pressure difference inside the one-way pressure relief valve 61 can achieve secondary oil suction to improve the stability of oil supply. Furthermore, by setting the one-way pressure relief valve 61 parallel to the filter 60, the risk of impurities depositing on one end of the one-way pressure relief valve 61 under the action of gravity and causing clogging of the one-way pressure relief valve 61 can be reduced, thus improving its service life.

[0055] This application combines an electronic pump 31 and a mechanical pump 32 to transport lubricating oil from the bottom of the housing 10 of the gearbox 100 to various parts of the transmission device 20 via a connecting oil pipe 50 and an injection pipe 40. This ensures that the lubricating oil forms an oil film at the gear meshing parts, preventing pitting damage caused by tooth surface friction. It also ensures that each friction pair maintains good lubrication under different operating conditions, while effectively reducing the lubricating oil level. This not only reduces refueling costs but also reduces gear oil churning losses, thereby improving the transmission efficiency of the gearbox 100 and the fuel economy of the vehicle.

[0056] According to the vehicle of this utility model embodiment, including the gearbox 100 of the above embodiment, by providing an oil injection pipe 40, lubricating oil can be directly sprayed to the transmission device 20 through the oil injection pipe 40. This can achieve excellent lubrication and cooling effects without increasing the energy loss of the transmission device 20 due to agitation. This can give the gearbox 100 better transmission efficiency. Moreover, by providing a connecting oil pipe 50, compared with the technical solution of directly forming oil passages on the housing 10, the layout difficulty of the lubrication system of the gearbox 100 can be greatly reduced. Furthermore, the lubricating oil can be directly pumped to the oil injection pipe 40 through the connecting oil pipe 50, with a short path and low pressure loss, which is beneficial to improving the lubrication effect.

[0057] 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.

[0058] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0059] In the description of this utility model, "multiple" means two or more.

[0060] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0061] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gearbox (100), characterized in that, include: Housing (10), transmission device (20), the transmission device (20) is disposed on the housing (10); The drive pump (30), the fuel injection pipe (40), and the connecting oil pipe (50) are all located in the housing (10). The connecting oil pipe (50) connects the drive pump (30) and the fuel injection pipe (40). The fuel injection pipe (40) has an oil outlet hole (43) facing the transmission device (20).

2. The gearbox (100) according to claim 1, characterized in that There are multiple fuel injection pipes (40) and multiple connecting oil pipes (50), and each of the multiple fuel injection pipes (40) and multiple connecting oil pipes (50) corresponds to another one.

3. The gearbox (100) according to claim 2, characterized in that, The transmission device (20) includes: a one-axis transmission mechanism (21) and a two-axis transmission mechanism (22). The one-axis transmission mechanism (21) and the two-axis transmission mechanism (22) are connected in transmission. The housing (10) forms a two-axis bearing mounting groove (11). The plurality of oil injection pipes (40) include: a first oil injection pipe (41). The plurality of connecting oil pipes (50) include: a first connecting oil pipe (51). The first connecting oil pipe (51) is connected between the drive pump (30) and the two-axis bearing mounting groove (11). The first oil injection pipe (41) is located in the two-axis bearing mounting groove (11) and is connected to the two-axis bearing mounting groove (11). The first oil injection pipe (41) passes through the two-axis transmission mechanism (22).

4. The gearbox (100) according to claim 3, characterized in that, The dual-axis bearing mounting groove (11) has a first connecting channel (111) which connects the first connecting oil pipe (51) and the first oil injection pipe (41).

5. The gearbox (100) according to claim 3, characterized in that, The housing (10) has a second connecting channel (12), and the plurality of fuel injection pipes (40) include a second fuel injection pipe (42), and the plurality of connecting oil pipes (50) include a second connecting oil pipe (52). The second connecting channel (12) connects the second connecting oil pipe (52) and the second fuel injection pipe (42).

6. The gearbox (100) according to claim 5, characterized in that, The housing (10) also forms a first shaft bearing mounting groove (13), the second oil injection pipe (42) is located outside the first shaft bearing mounting groove (13), part of the oil outlet (43) of the second oil injection pipe (42) faces the first shaft transmission mechanism (21), and part of the oil outlet (43) of the second oil injection pipe (42) faces the second shaft transmission mechanism (22).

7. The gearbox (100) according to claim 1, characterized in that, The drive pump (30) includes an electronic pump (31) and a mechanical pump (32). The mechanical pump (32) is connected between the electronic pump (31) and the connecting oil pipe (50). The transmission device (20) includes a single-axis transmission mechanism (21), a two-axis transmission mechanism (22), and a three-axis transmission mechanism (23). The two-axis transmission mechanism (22) is connected between the single-axis transmission mechanism (21) and the three-axis transmission mechanism (23). The three-axis transmission mechanism (23) is connected to the mechanical pump (32).

8. The gearbox (100) according to claim 7, characterized in that, The mechanical pump (32) includes: a housing (321) and a rotor. The housing (321) is disposed in the housing (10) and forms a first oil passage (3211) and a second oil passage (3212). The first oil passage (3211) is connected to the electronic pump (31), and the second oil passage (3212) is connected to the connecting oil pipe (50). The rotor is movably disposed in the housing (321) and is connected to the three-axis transmission mechanism (23).

9. The gearbox (100) according to claim 7, characterized in that, Also includes: A filter (60) and a one-way pressure relief valve (61) are provided. The filter (60) is connected between the one-way pressure relief valve (61) and the electronic pump (31). The one-way pressure relief valve (61) is configured to conduct unidirectionally from the filter (60) to the mechanical pump (32). The one-way pressure relief valve (61) is arranged parallel to the filter (60).

10. A vehicle, characterized in that, Includes the gearbox (100) according to any one of claims 1-9.

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