New energy automobile gear structure and gearbox assembly

Abstract

The utility model provides a new energy automobile gear structure and a gearbox assembly, and relates to the field of gear manufacturing. The gear structure includes a gear body having opposite first and second sides. The gear body comprises an inner sleeve, a web and an outer ring. The inner sleeve is provided with an inner hole for the shaft body to penetrate through. The web plate is arranged between the inner sleeve and the outer ring and connected to the inner sleeve and the outer ring at the same time. A plurality of racks in the first rotating direction are arranged on the peripheral face of the outer ring, and tooth grooves are formed between the adjacent racks and used for guiding lubricating oil from the first side to the second side. An oil stirring piece in the second rotating direction is arranged on the side face, corresponding to the first side, of the web in a protruding mode and used for guiding lubricating oil located on the first side in the direction away from the gear body. The first rotation direction is opposite to the second rotation direction. According to the gear structure, lubricating oil can be guided to the two sides of the gear, so that bearings on the two sides are effectively lubricated; compared with the existing scheme of improving the box body structure and arranging the forced lubricating points, the manufacturing cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of gear manufacturing, and in particular to a new energy vehicle gear structure and a gearbox assembly. Background Art

[0002] In the reduction box of new energy vehicles, the internal gears and bearings of the gear box and other parts mainly use gear oil splash lubrication. However, because the gear itself is a helical gear, the oil flow direction driven by the oil stirring will point to one side according to the rotation direction of the gear, and the auxiliary gear meshing with the gear has opposite rotation directions, and the rotation directions of the two are also opposite. In this way, the auxiliary gear also directs the lubricating oil to the same side, which will cause poor lubrication of the bearing on the other side. In the existing technical solutions, it is generally adopted to set a complex oil guide structure on the box body or increase the forced lubrication oil spray point to improve the lubrication effect of the bearing on the other side. Designing an oil guide structure on the box body will increase the complexity of the box body and increase the manufacturing cost; if the forced lubrication oil spray point is increased, there will also be additional cost expenditure.

[0003] In addition, the powertrain of new energy vehicles does not use an engine and has no engine noise. Passengers will be more sensitive to the noise of the gearbox and require the gearbox to have lower noise. The motor speed is much higher than the engine, so it is more likely to produce howling noise. Therefore, a gear with noise reduction function is required. Utility Model Content

[0004] The purpose of the utility model is to provide a new energy vehicle gear structure and a gearbox assembly, which can guide lubricating oil to both sides of the gear, thereby effectively lubricating the bearings on both sides; compared with the existing solutions of improving the box structure and setting forced lubrication points, it can reduce manufacturing costs.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a new energy vehicle gear structure, comprising:

[0007] A gear body, wherein the gear body has a first side and a second side opposite to each other in the axial direction; the gear body comprises an inner sleeve, a web and an outer ring, wherein the inner sleeve is provided with an inner hole for passing a shaft body; the web is provided between the inner sleeve and the outer ring and is connected to the inner sleeve and the outer ring at the same time; a plurality of racks of a first rotation direction are provided on the outer circumferential surface of the outer ring, wherein the plurality of racks are arranged at intervals around the axis of the outer ring, and tooth grooves are formed between adjacent racks, wherein the tooth grooves are used to guide lubricating oil from the first side to the second side;

[0008] An oil stirring member with a second rotation direction is protruded on the side surface of the web corresponding to the first side, and the oil stirring member is used to guide the lubricating oil on the first side away from the gear body; the first rotation direction is opposite to the second rotation direction.

[0009] In an optional embodiment, a first groove is provided on the side surface of the web corresponding to the first side, the first groove having a first edge and a second edge arranged at intervals in the second rotation direction, the first edge being located in front of the second edge, and the oil stirring member protruding at the second edge.

[0010] Based on the above scheme, by setting the first groove, it is possible to reduce the weight of the gear body, save materials, and reduce processing and manufacturing costs, and also to store part of the lubricating oil through the first groove, thereby extending the time that the lubricating oil stays on the first side of the gear body and increasing the amount of lubricating oil on the first side, which is beneficial for stirring the lubricating oil in a direction away from the first side through the oil stirring element, thereby facilitating effective lubrication of the bearing on the first side of the gear body.

[0011] In an optional embodiment, a second groove is provided on the side surface of the web corresponding to the second side.

[0012] Based on the above solution, by providing a second groove on the second side of the gear body, the weight of the gear body can be further reduced, which is beneficial to the lightweight design of the vehicle.

[0013] In an optional embodiment, the number of the first groove and the number of the second groove are both plural, and the plurality of the first grooves and the plurality of the second grooves are alternately arranged in the circumferential direction of the gear body.

[0014] Based on the above scheme, by alternately arranging multiple first grooves and multiple second grooves, the web is formed into a bent structural plate with multiple bending portions, which can enhance the structural strength of the web, thereby improving the structural strength of the gear body, making the gear body less prone to deformation and damage, extending the service life of the gear body, and reducing the noise generated during the operation of the gear body.

[0015] In an optional embodiment, the web is configured as a spiral plate in the second rotation direction.

[0016] Based on the above scheme, the web is set as a spiral plate, and the rotation direction of the web is consistent with the rotation direction of the oil stirring member. In this way, during the operation of the gear body, the web and the oil stirring member cooperate to stir the lubricating oil in the direction away from the first side of the gear body, thereby guiding the lubricating oil to the bearing corresponding to the first side of the gear body, and effectively lubricating the bearing on this side. In other words, there are multiple first grooves on the web, and the multiple first grooves cooperate with the spiral structure of the web, which not only increases the oil storage capacity of the lubricating oil, but also improves the oil stirring effect, and further improves the lubrication effect of the bearing located on the first side of the gear body.

[0017] In an optional embodiment, two ends of the oil stirring member in the extension direction thereof are respectively in contact with the inner sleeve and the outer ring.

[0018] Based on the above scheme, the oil stirring element has a longer length in the radial direction of the gear body, and the area swept by the oil stirring element during rotation is large, so the oil stirring area is large, thereby effectively improving the oil stirring effect and facilitating the lubrication of the bearing.

[0019] In an optional embodiment, the distance between the end of the oil stirring member close to the outer ring and the root circle of the gear body is set between (1mm-3mm).

[0020] Based on the above scheme, the oil stirring element has a long radial length of the gear body and does not affect the normal assembly of the gear body. The oil stirring element sweeps a large area during rotation, and the oil stirring area is large, thereby effectively improving the oil stirring effect and facilitating the lubrication of the bearings.

[0021] In an optional embodiment, the draft angles of the web and the oil stirring member are set between (3-7°).

[0022] Based on the above solution, during the process of manufacturing the gear body, the edge position of the gear body is not easily damaged during the demolding process, thereby improving the oil stirring effect of the oil stirring member and the web, and further improving the lubrication effect of the bearing.

[0023] In an optional embodiment, an internal spline is provided on the inner circumferential surface of the inner hole.

[0024] Based on the above scheme, by setting the internal spline, when the shaft body is inserted into the inner hole, the external spline on the shaft body can be engaged with the internal spline in the inner hole, which is convenient for assembly, the combination is firm and stable, not easy to slip, and is conducive to torque transmission.

[0025] In a second aspect, the utility model provides a gearbox assembly, the gearbox assembly comprising:

[0026] The new energy vehicle gear structure described in any of the aforementioned embodiments.

[0027] The beneficial effects of the embodiments of the utility model are:

[0028] In summary, the new energy vehicle gear structure provided by this embodiment is provided with an oil stirring member with a rotation direction opposite to that of the rack on the first side of the web. During the rotation of the gear body, driven by the rack, part of the lubricating oil can move from the first side of the gear body along the tooth groove to the second side of the gear body, thereby effectively lubricating the bearing on the second side of the gear body. At the same time, during this process, part of the lubricating oil contacts the oil stirring member, and driven by the oil stirring member, the part of the lubricating oil moves in a direction away from the first side of the gear body, that is, driven by the oil stirring member, part of the lubricating oil moves in a direction from the second side to the first side, lubricating the bearing on the first side of the gear body. In this way, during the rotation of the gear body, part of the lubricating oil is guided to the second side through the tooth groove to lubricate the bearing on the second side, and part of the lubricating oil is guided to the bearing on the first side by the oil stirring member to lubricate the bearing on the first side. The bearings on both sides of the gear body can be effectively lubricated, thereby improving the lubrication effect, extending the service life of the bearings, and reducing the operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a gear structure of a new energy vehicle according to an embodiment of the utility model from one perspective;

[0031] Figure 2 This is a front view of the gear structure of a new energy vehicle according to an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of a gear structure of a new energy vehicle according to an embodiment of the utility model from another perspective;

[0033] Figure 4 This is a schematic diagram of the application of the gear structure of a new energy vehicle according to an embodiment of the utility model.

[0034] icon:

[0035] 001-bearing; 011-first rotation direction; 012-second rotation direction; 002-gear body; 021-first side; 022-second side; 200-inner sleeve; 201-inner hole; 202-inner spline; 220-web; 221-first groove; 2211-first edge; 2212-second edge; 222-spoke; 223-second groove; 240-outer ring; 241-rack; 242-tooth groove; 260-oil stirring member. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the prior art, the gears in the gearbox of new energy vehicles are set as helical gears, that is, the tooth grooves 242 on the outer peripheral surface of the gears are set as oblique grooves. During the movement of the gears, under the guidance of the oblique grooves, the lubricating oil always moves in one direction, and can only lubricate the bearing 001 on the same side of the gear, while the bearing 001 on the other side of the gear cannot be effectively lubricated, resulting in uneven lubrication of the bearing 001, shortening the service life of the bearing 001, and easily causing noise. In order to ensure that the bearings 001 on both sides of the gear can be effectively lubricated, the prior art generally adopts an improved box structure to set an oil guide part, or set a forced lubrication oil injection point. Although these measures improve the problem of bearing 001 lubrication, they lead to a complex gearbox structure and high manufacturing cost.

[0043] In view of this, the designer provides a new energy vehicle gear structure, which achieves effective lubrication of the bearings 001 on both sides of the gear by improving the gear structure, and has low processing and manufacturing costs.

[0044] It should be noted that the gear structure is not limited to application in new energy vehicles, nor is it limited to application in gearboxes. It can be applied to various technical solutions involving gear transmission, which are not listed one by one in this embodiment.

[0045] Please combine Figure 1-Figure 3In this embodiment, the gear structure of the new energy vehicle includes a gear body 002, and the gear body 002 has a first side 021 and a second side 022 opposite to each other in its axial direction. The gear body 002 includes an inner sleeve 200, a web 220 and an outer ring 240. The inner sleeve 200 is provided with an inner hole 201 for passing the shaft body. The web 220 is provided between the inner sleeve 200 and the outer ring 240 and is connected to the inner sleeve 200 and the outer ring 240 at the same time. A plurality of racks 241 of a first rotation direction 011 are provided on the outer circumferential surface of the outer ring 240, and the plurality of racks 241 are arranged at intervals around the axis of the outer ring 240, and tooth grooves 242 are formed between adjacent racks 241, and the tooth grooves 242 are used to guide the lubricating oil from the first side 021 to the second side 022. An oil stirring member 260 with a second rotation direction 012 is protruded on the side surface of the web 220 corresponding to the first side 021 . The oil stirring member 260 is used to guide the lubricating oil on the first side 021 away from the gear body 002 . The first rotation direction 011 is opposite to the second rotation direction 012 .

[0046] Based on the above scheme, the working principle of the new energy vehicle gear structure provided in this embodiment is as follows:

[0047] Please combine Figure 4 By providing an oil stirring member 260 with a rotation direction opposite to that of the rack 241 on the first side 021 of the web 220, during the rotation of the gear body 002, driven by the rack 241, part of the lubricating oil can move from the first side 021 of the gear body 002 along the tooth groove 242 to the second side 022 of the gear body 002, thereby effectively lubricating the bearing 001 on the second side 022 of the gear body 002. At the same time, during this process, part of the lubricating oil contacts the oil stirring member 260, and driven by the oil stirring member 260, the part of the lubricating oil moves in a direction away from the first side 021 of the gear body 002, that is, driven by the oil stirring member 260, part of the lubricating oil moves in a direction from the second side 022 to the first side 021, thereby lubricating the bearing 001 on the first side 021 of the gear body 002. In this way, when the gear body 002 rotates, part of the lubricating oil is guided to the second side 022 through the tooth groove 242 to lubricate the bearing 001 on the second side 022, and part of the lubricating oil is guided by the oil stirring member 260 to the bearing 001 on the first side 021 to lubricate the bearing 001 on the first side 021. The bearings 001 on both sides of the gear body 002 can be effectively lubricated, thereby improving the lubrication effect, extending the service life of the bearing 001, and reducing the operating cost.

[0048] It should be noted that please combine Figure 1The first rotation direction 011 can be understood as a clockwise direction, and the second rotation direction 012 can be understood as a counterclockwise direction. The rack 241 and the oil stirring member 260 have opposite rotation directions, so that the lubricating oil can be guided to different sides of the gear body 002, which is beneficial to effectively lubricate the bearings 001 on both sides of the gear body 002. Figure 1 When the gear body 002 operates normally, its rotation direction is counterclockwise, that is, the gear body 002 rotates in the second rotation direction 012. When it rotates counterclockwise, part of the lubricating oil can flow from the left side to the right side under the guidance of the tooth groove 242, and under the action of the oil stirring member 260, part of the lubricating oil can flow in the direction away from the left side.

[0049] The following embodiments illustrate the details of the new energy vehicle gear structure provided in this application by way of examples.

[0050] In the present embodiment, optionally, the cross-sectional profile of the inner sleeve 200 is annular, and the inner sleeve 200 is provided with a circular inner hole 201 coaxial therewith, and an inner spline 202 is provided on the hole wall of the inner hole 201. In this way, an outer spline can be provided on the shaft body, and when the shaft body is inserted into the inner hole 201 of the inner sleeve 200, the outer spline on the shaft body is engaged with the inner spline 202 in the inner hole 201 to realize the transmission of torque.

[0051] Please combine Figure 1 and Figure 2 In this embodiment, the web 220 is optionally configured as a spiral plate. Specifically, a plurality of first grooves 221 are provided on the side surface of the web 220 corresponding to the first side 021 of the gear body 002. The plurality of first grooves 221 are evenly spaced and arranged in the circumferential direction of the web 220. For example, in this embodiment, the number of the first grooves 221 is four. Spokes 222 are formed between adjacent first grooves 221. The four first grooves 221 define four spokes 222. Each spoke 222 extends in the second rotation direction 012. That is, each spoke 222 also forms an oil stirring structure. The four spokes 222 cooperate to make the web 220 appear as a spiral plate in the second rotation direction 012 when viewed from the first side 021. Thus, during the operation of the gear body 002, each first groove 221 has the function of storing oil. After the lubricating oil enters the first groove 221, the time for the lubricating oil to stay on the first side 021 of the gear body 002 is prolonged, and the amount of the lubricating oil on the first side 021 is increased, which is conducive to stirring the lubricating oil in a direction away from the first side 021 through the oil stirring member 260, thereby facilitating effective lubrication of the bearing 001 on the first side 021 of the gear body 002. When the lubricating oil cooperates with the spokes 222 and the oil stirring member 260, it can better move in a direction away from the first side 021, and effectively lubricate the bearing 001.

[0052] Further, the first groove 221 has a first edge 2211 and a second edge 2212 arranged at intervals in the second rotation direction 012, the first edge 2211 is located in front of the second edge 2212, the length of the first edge 2211 is less than the length of the second edge 2212, and the oil stirring member 260 is arranged on the second edge 2212. The extension direction of the oil stirring member 260 is consistent with the extension direction of the second edge 2212, which is conducive to processing and manufacturing, and avoids interference, and the oil stirring effect is better. In addition, during the oil stirring process, the groove wall corresponding to the second edge 2212 is located at the rear, and cooperates with the oil stirring member 260 to better stir the lubricating oil.

[0053] Please combine Figure 3 Optionally, a plurality of second grooves 223 are also provided on the side surface of the web 220 corresponding to the second side 022 of the gear body 002, and the plurality of second grooves 223 are evenly spaced and arranged in the circumferential direction of the gear body 002. For example, in this embodiment, the number of the second grooves 223 is equal to the number of the first grooves 221 and both are four. The plurality of first grooves 221 and the plurality of second grooves 223 are alternately arranged in sequence in the circumferential direction of the gear body 002, and the structure of the web 220 is regular and convenient for processing. When observing the web 220 from the second side 022, the web 220 is a spiral plate with a first rotation direction 011. By providing the first grooves 221 and the second grooves 223, the weight of the gear body 002 can be reduced, consumables can be reduced, and costs can be reduced.

[0054] It should be understood that in other embodiments, the number of the first groove 221 and the second groove 223 is not limited to four.

[0055] In addition, an oil stirring member 260 is protruded correspondingly at the second edge 2212 of each first groove 221 to increase the oil stirring area of ​​the oil stirring member 260 and improve the oil stirring effect.

[0056] In this embodiment, the oil stirring member 260 is optionally configured as an arc-shaped strip, and the two ends of the oil stirring member 260 in the extension direction thereof are respectively in contact with the inner sleeve 200 and the outer ring 240. Furthermore, the end of the oil stirring member 260 can extend to the annular surface of the outer ring 240 corresponding to the first side 021, thereby increasing the length of the oil stirring member 260 and improving the oil stirring efficiency and effect. Optionally, the distance between the end of the oil stirring member 260 close to the outer ring 240 and the tooth root circle of the gear body 002 is set between (1mm-3mm). For example, the distance between the end of the oil stirring member 260 close to the outer ring 240 and the tooth root circle of the gear body 002 can be set to 1mm, 2mm or 3mm, etc.

[0057] It should be noted that the oil stirring member 260 is protruded from the web 220 and the outer ring 240 , and the protruding height of the oil stirring member 260 is selected as required, which is not specifically limited in this embodiment.

[0058] In addition, in order to facilitate the demoulding of the gear body 002, the draft angle of the web 220 and the oil stirring member 260 is set between (3-7°). For example, the draft angle of the web 220 and the oil stirring member 260 can be set to 3, 3.5° or 7°.

[0059] Please combine Figure 4 The new energy vehicle gear structure provided in this embodiment is provided with an oil stirring member 260 on the web 220 of the gear body 002. The rotation direction of the oil stirring member 260 is opposite to that of the rack 241. During the operation of the gear body 002, the oil guiding directions of the oil stirring member 260 and the rack 241 are opposite. Thus, under the cooperation of the rack 241 and the oil stirring member 260, the lubricating oil can be guided to the first side 021 and the second side 022 of the gear body 002 respectively, thereby effectively lubricating the bearings 001 on both sides of the gear body 002. Since the lubrication of the bearings 001 on both sides is achieved by improving the structure of the gear body 002, the processing difficulty is low and the processing cost is low.

[0060] This embodiment also provides a gearbox assembly, including the new energy vehicle gear structure of the above embodiment, which has the advantages of good lubrication effect of at least the bearings 001 distributed on both sides of the gear body 002, low processing and manufacturing cost, and low operating noise.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new energy vehicle gear structure, characterized in that: include: A gear body (002), wherein the gear body (002) has a first side (021) and a second side (022) opposite to each other in the axial direction; the gear body (002) comprises an inner sleeve (200), a web (220) and an outer ring (240); the inner sleeve (200) is provided with an inner hole (201) for passing a shaft body; the web (220) is provided between the inner sleeve (200) and the outer ring (240) and is simultaneously connected to the inner sleeve (200) and the outer ring (240); a plurality of racks (241) of a first rotation direction (011) are provided on the outer circumferential surface of the outer ring (240); the plurality of racks (241) are arranged at intervals around the axis of the outer ring (240); tooth grooves (242) are formed between adjacent racks (241); the tooth grooves (242) are used to guide lubricating oil from the first side (021) to the second side (022); An oil stirring member (260) with a second rotation direction (012) is protrudingly provided on the side surface of the web (220) corresponding to the first side (021), and the oil stirring member (260) is used to guide the lubricating oil located on the first side (021) in a direction away from the gear body (002); the first rotation direction (011) is opposite to the second rotation direction (012).

2. The new energy vehicle gear structure according to claim 1 is characterized in that: A first groove (221) is provided on the side surface of the web (220) corresponding to the first side (021), and the first groove (221) has a first edge (2211) and a second edge (2212) arranged at intervals in the second rotation direction (012), and the first edge (2211) is located in front of the second edge (2212), and the oil stirring member (260) is protruding from the second edge (2212).

3. The new energy vehicle gear structure according to claim 2 is characterized in that: A second groove (223) is provided on the side surface of the web (220) corresponding to the second side (022).

4. The new energy vehicle gear structure according to claim 3 is characterized in that: The number of the first groove (221) and the number of the second groove (223) are both multiple, and the multiple first grooves (221) and the multiple second grooves (223) are alternately arranged in the circumferential direction of the gear body (002).

5. The new energy vehicle gear structure according to claim 4 is characterized in that: The web (220) is configured as a spiral plate in the second rotation direction (012).

6. The new energy vehicle gear structure according to claim 1, characterized in that: The two ends of the oil stirring member (260) in the extension direction thereof are respectively in contact with the inner sleeve (200) and the outer ring (240).

7. The new energy vehicle gear structure according to claim 6, characterized in that: The distance between the end of the oil stirring member (260) close to the outer ring (240) and the tooth root circle of the gear body (002) is set between (1mm-3mm).

8. The new energy vehicle gear structure according to claim 1, characterized in that: The draft angles of the web (220) and the oil stirring member (260) are set between (3-7°).

9. The new energy vehicle gear structure according to claim 1, characterized in that: An inner spline (202) is provided on the inner circumferential surface of the inner hole (201).

10. A gearbox assembly, characterized in that: The gearbox assembly comprises: The new energy vehicle gear structure according to any one of claims 1 to 9.

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