New energy automobile noise reduction and oil guide gear and gear reduction box

Abstract

The utility model provides a noise reduction and oil guide gear and a gear reducer for a new energy automobile, and relates to the technical field of gear manufacturing, and the noise reduction and oil guide gear comprises an inner ring, a connecting plate and an outer ring. And the connecting plate is simultaneously connected with the inner ring and the outer ring. The connecting plate is provided with a first plate face and second plate faces, a plurality of first oil guide grooves are formed in the first plate face, each first oil guide groove is provided with a first groove wall and a second groove wall, each second groove wall is arranged to be an inwards-concave arc face, and the second groove walls form a spiral structure arranged in the first spiral direction. A through hole is formed in the connecting plate; and a plurality of second oil guide grooves are formed in the second plate surface. And helical tooth grooves which are distributed in a second rotation direction opposite to the first rotation direction are formed in the peripheral surface of the outer ring. When the gear rotates in the first rotating direction, the oblique tooth groove can guide lubricating oil from the first plate face to the second plate face, and the first oil guide groove can guide the lubricating oil in the direction away from the first plate face. The gear is high in structural strength, good in oil guiding effect, good in bearing lubricating effect and low in noise during operation.

Description

Technical Field

[0001] The utility model relates to the technical field of gear manufacturing, and in particular to a noise reduction and oil guide gear and a gear reduction box for a new energy vehicle. Background Art

[0002] Under the current trend of rapid development of new energy vehicles, the performance of the new energy vehicle reducer is crucial, and the core components in the reducer are mainly multiple gear sets with transmission connections. In some gearboxes, the gear set includes helical gears, that is, the tooth grooves on the outer circumference of the gear are processed into helical grooves. During the rotation of the gear, the design of the helical grooves can make the lubricating oil move from one side of the gear to the other side, that is, the helical grooves play a role in guiding the movement direction of the lubricating oil. The helical grooves not only serve to circulate the lubricating oil, but their main purpose is to mesh with other gears. Therefore, the inclination directions of the multiple helical grooves on the outer circumference of the gear are consistent. During the movement of the gear, the lubricating oil is always guided to one side of the gear, while the other side of the gear has less lubricating oil, and the lubrication effect on the bearing on that side is poor. Utility Model Content

[0003] The purpose of the utility model is to provide a noise reduction and oil guide gear and a gear reduction box for a new energy vehicle, which can effectively lubricate the bearings on both sides of the gear and reduce the noise generated during the operation of the gear.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In the first aspect, the utility model provides a noise reduction and oil guide gear for a new energy vehicle, comprising:

[0006] An inner ring, a connecting plate and an outer ring, wherein the inner ring is provided with a mounting hole for inserting a transmission shaft; the connecting plate is located between the inner ring and the outer ring, and the connecting plate is connected to the outer circumference of the inner ring and the inner circumference of the outer ring at the same time;

[0007] The connecting plate comprises a first plate surface and a second plate surface which are opposite to each other in the axial direction of the inner ring, and the first plate surface and the second plate surface are both concave relative to the inner ring and the outer ring; a plurality of first oil guide grooves are arranged at intervals around the axis of the inner ring on the first plate surface, and each of the first oil guide grooves comprises a first groove wall and a second groove wall which are arranged at intervals in a first rotation direction, the first groove wall is located in front of the second groove wall, the second groove wall is set as an inwardly concave arc surface, and a plurality of the second groove walls constitute a spiral structure arranged in the first rotation direction; a through hole which conducts the first plate surface and the second plate surface is set on the connecting plate; a plurality of second oil guide grooves are arranged at intervals around the axis of the inner ring on the second plate surface, and the plurality of first oil guide grooves and the plurality of second oil guide grooves are arranged alternately in the circumferential direction of the inner ring;

[0008] The outer peripheral surface of the outer ring is provided with helical tooth grooves arranged in a second rotation direction opposite to the first rotation direction;

[0009] When the gear rotates along the first rotation direction, the helical tooth groove can guide the lubricating oil from the first plate surface to the second plate surface, and the first oil guide groove can guide the lubricating oil in a direction away from the first plate surface.

[0010] In an optional embodiment, the through hole is provided on the bottom wall of the first oil guiding groove.

[0011] Based on the above scheme, the through hole is arranged on the bottom wall of the first oil guide groove, which can directly connect the first oil guide groove and the second plate surface. While reducing the weight of the gear, it can increase the oil conduction volume, thereby facilitating the lubricating oil to effectively lubricate the bearings on both sides of the gear through the through hole.

[0012] In an optional embodiment, the distance between the second groove wall and the hole wall of the through hole is set to L1, 10mm≤L1≤15mm;

[0013] The distance between the inner circumference of the outer ring and the wall of the through hole is set to L2, 10mm≤L2≤15mm;

[0014] The distance between the outer peripheral surface of the inner ring and the hole wall of the through hole is set to L3, 8mm≤L3≤15mm.

[0015] Based on the above scheme, by reasonably setting the position of the through hole, it is ensured that the lubricating oil can smoothly pass through the through hole to reach the bearings on both sides of the gear to lubricate the bearings. Moreover, while reducing the weight of the gear, it is not easy to affect the structural strength of the gear itself. The gear is not only light in weight and high in structural strength, but also generates little noise during operation, which greatly improves the NVH level of the gearbox.

[0016] In an optional embodiment, the through hole is configured as a variable diameter hole, the width of the through hole gradually increases in a direction from the inner ring to the outer ring, and the width direction of the through hole is consistent with the circumferential direction of the inner ring.

[0017] Based on the above scheme, the shape of the through hole is similar to that of the first oil guide groove, which can ensure that the distance between the four sides of the through hole and the groove walls of the four sides of the first oil guide groove is close. After the hole is opened, it can not only reduce the weight of the gear, but also ensure that the width of the position of the bottom wall of the groove where the hole is not opened is consistent. The connecting plate has high structural strength, strong load-bearing capacity and long service life.

[0018] In an optional embodiment, the through hole is provided on the bottom wall of the second oil guiding groove.

[0019] Based on the above scheme, a through hole is opened on the bottom wall of the second oil guide groove, which is convenient for processing and manufacturing, reduces the processing difficulty, saves processing costs, further reduces the weight of the gear, increases the oil flow rate, and is conducive to effective lubrication of the bearings on both sides of the gear.

[0020] In an optional embodiment, the through hole is opened on a groove side wall shared by the adjacent first oil guiding groove and the second oil guiding groove.

[0021] Based on the above scheme, during the rotation of the gear, the lubricating oil is in the first oil guide groove, and the lubricating oil moves under the impetus of the second groove wall. Part of the lubricating oil can be stirred and move in the direction away from the first plate surface, that is, leave the first oil guide groove from the groove opening of the first oil guide groove to lubricate the bearing on the first plate surface. At the same time, since a through hole is provided on the side wall of the groove, part of the lubricating oil can also directly enter the second oil guide groove through the through hole, thereby lubricating the bearing close to the second plate surface, thereby improving the lubrication efficiency and lubrication effect of the bearing.

[0022] In an optional embodiment, the distance between the first plate surface and the second plate surface is H1, the distance between the first plate surface and the side surface of the inner ring close to the first plate surface is H2, the depth of the first oil guide groove is set to H3, the distance between the bottom wall of the first oil guide groove and the second plate surface is H4, and the axial dimension of the inner ring is L, L / 2

[0023] Based on the above solution, by reasonably setting the thickness of the connecting plate, the structural strength of the connecting plate can be guaranteed and the oil stirring efficiency of the connecting plate can be improved, thereby improving the lubrication effect.

[0024] In an optional embodiment, the second groove wall is configured as a concave arc surface, and the radius of the circle where the second groove wall is located is set to R, 45mm≤R≤50mm.

[0025] Based on the above solution, the radius of the circle where the second groove wall is located is set between 45mm and 50mm, which is conducive to oil guidance.

[0026] In an optional embodiment, an internal spline is provided on the hole wall of the mounting hole.

[0027] Based on the above scheme, when the rotating shaft and the gear are assembled, an external spline can be set on the outside of the rotating shaft, the rotating shaft is inserted into the mounting hole, the external spline is meshed with the internal spline, the rotating shaft and the gear are relatively fixed in the circumferential direction of the rotating shaft, the two can rotate synchronously, thereby realizing the transmission of torque, the connection structure is simple and reliable, and the operation is stable and reliable.

[0028] In a second aspect, the utility model provides a gear reduction box, the gear reduction box comprising: ​

[0029] The noise reduction and oil guide gear for a new energy vehicle as described in any of the aforementioned embodiments.

[0030] The beneficial effects of the embodiments of the utility model are:

[0031] In summary, the noise reduction and oil guide gear for new energy vehicles provided in this embodiment is provided by arranging a connecting plate between the inner ring and the outer ring, and a plurality of first oil guide grooves are provided on the first plate surface of the connecting plate, and a plurality of second oil guide grooves are provided on the second plate surface of the connecting plate, so that the connecting plate is a concave-convex plate. Compared with the traditional flat plate structure, the connecting plate is light in weight, less in material consumption, and low in cost, and the concave-convex connecting plate has a plurality of bending portions, that is, a bending portion is formed between adjacent first oil guide grooves and second oil guide grooves, and the bending portion can enhance the structural strength of the connecting plate, so that the weight of the gear is reduced while the structural strength is improved, the noise is small when the gear rotates, and the NVH level of the gearbox can be effectively improved. In addition, since the first oil guide groove has an arc-shaped and concave second groove wall, the second groove wall is behind the first groove wall in the direction of gear rotation, during the gear rotation process, part of the lubricating oil enters the first oil guide groove, and under the stirring of the second groove wall, the lubricating oil can be guided in a direction away from the first plate surface, that is, away from the gear, to lubricate the bearing located on the first plate surface side of the gear. In addition, due to the design of the through hole, the two sides of the gear are interconnected, thereby increasing the flow of lubricating oil and improving the lubrication effect. Combined with the helical tooth grooves set on the outer ring, the helical tooth grooves can guide part of the lubricating oil from the first plate surface to the second plate surface to lubricate the bearing on one side of the second plate surface. In this way, during the rotation of the gear, both sides of the gear have lubricating oil, thereby effectively lubricating the bearings on both sides of the gear, and the lubrication effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A schematic diagram of a noise reduction and oil guide gear for a new energy vehicle according to an embodiment of the utility model from one perspective;

[0034] Figure 2 A schematic diagram of the noise reduction and oil guide gear of a new energy vehicle according to an embodiment of the utility model from another perspective;

[0035] Figure 3 It is a cross-sectional schematic diagram of the noise reduction and oil guide gear of a new energy vehicle according to an embodiment of the utility model.

[0036] icon:

[0037] 001-first rotation direction; 002-second rotation direction; 003-oil return groove; 100-inner ring; 101-mounting hole; 110-inner spline; 200-connecting plate; 201-first plate surface; 202-second plate surface; 210-first oil guide groove; 211-first groove wall; 212-second groove wall; 220-second oil guide groove; 230-through hole; 300-outer ring; 310-helical tooth groove. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the prior art, when the gear rotates, the helical teeth on the outside of the gear can guide the oil to one side of the gear. Since the inclination direction of all the helical teeth on the outside of the gear is consistent, the guiding direction of the lubricating oil also points to the same direction. There is less lubricating oil on the other side of the gear, and the lubrication effect of the bearing on this side is poor, resulting in a shortened service life of the bearing on one side, thereby affecting the operating stability of the gear and increasing the operating noise of the gear.

[0045] In view of this, the designer provides a noise reduction and oil guide gear for new energy vehicles, which can effectively lubricate the bearings on both sides of the gear, extend the service life of the bearing, improve the operating stability of the gear, and reduce the noise during the operation of the gear.

[0046] It should be understood that the gear provided in this embodiment is not limited to use in new energy vehicles, but can also be applied to scenarios of other gear transmission structures.

[0047] Please combine Figure 1-Figure 3In this embodiment, the noise reduction and oil guide gear of the new energy vehicle includes an inner ring 100, a connecting plate 200 and an outer ring 300. The inner ring 100 is provided with a mounting hole 101 for plugging the transmission shaft; the connecting plate 200 is located between the inner ring 100 and the outer ring 300, and the connecting plate 200 is connected to the outer circumference of the inner ring 100 and the inner circumference of the outer ring 300 at the same time. The connecting plate 200 has a first plate surface 201 and a second plate surface 202 opposite to each other in the axial direction of the inner ring 100, and the first plate surface 201 and the second plate surface 202 are both concave relative to the inner ring 100 and the outer ring 300; the first plate surface 201 is provided with a plurality of first oil guide grooves 210 arranged at intervals around the axis of the inner ring 100, and each first oil guide groove 210 has a first groove wall 211 and a second groove wall 212 arranged at intervals in the first rotation direction 001, and the first groove wall 211 is located at the first rotation direction 001. In front of the second groove wall 212, the second groove wall 212 is set as an inner concave arc surface, and multiple second groove walls 212 constitute a spiral structure arranged in the first rotation direction 001; the connecting plate 200 is provided with a through hole 230 connecting the first plate surface 201 and the second plate surface 202; the second plate surface 202 is provided with multiple second oil guide grooves 220 arranged at intervals around the axis of the inner ring 100, and the multiple first oil guide grooves 210 and the multiple second oil guide grooves 220 are alternately arranged in the circumferential direction of the inner ring 100. The outer peripheral surface of the outer ring 300 is provided with helical tooth grooves 310 arranged in the second rotation direction 002 opposite to the first rotation direction 001. When the gear rotates along the first rotation direction 001, the helical tooth grooves 310 can guide the lubricating oil from the first plate surface 201 to the second plate surface 202, and the first oil guide grooves 210 can guide the lubricating oil in a direction away from the first plate surface 201.

[0048] Based on the above scheme, the working principle of the noise reduction and oil guide gear of the new energy vehicle provided in this embodiment is as follows:

[0049] By arranging a connecting plate 200 between the inner ring 100 and the outer ring 300, and opening a plurality of first oil guide grooves 210 on the first plate surface 201 of the connecting plate 200, and opening a plurality of second oil guide grooves 220 on the second plate surface 202 of the connecting plate 200, the connecting plate 200 is formed into a concave-convex plate. Compared with the traditional flat plate structure, the connecting plate 200 is light in weight, requires less consumables, and has low cost. The concave-convex connecting plate 200 has a plurality of bending portions, that is, bending portions are formed between adjacent first oil guide grooves 210 and second oil guide grooves 220. The bending portions can enhance the structural strength of the connecting plate 200. In this way, the weight of the gear is reduced while its structural strength is improved. The noise is small when the gear rotates, which can effectively improve the NVH level of the gearbox.

[0050] Furthermore, since the first oil guide groove 210 has an arc-shaped and inwardly concave second groove wall 212, the second groove wall 212 is located behind the first groove wall 211 in the gear rotation direction. Figure 1Taking the perspective as a reference, the rotation direction of the gear is consistent with the first rotation direction 001, that is, the gear rotates in the clockwise direction. During the rotation of the gear, part of the lubricating oil enters the first oil guide groove 210. Under the stirring of the second groove wall 212, the lubricating oil can be guided in the direction away from the first plate surface 201, that is, away from the gear, to lubricate the bearing on the first plate surface 201 side of the gear. In addition, due to the design of the through hole 230, the two sides of the gear are interconnected, thereby increasing the flow of the lubricating oil and improving the lubrication effect. Combined with the helical tooth groove 310 set on the outer ring 300, the helical tooth groove 310 can guide part of the lubricating oil from the first plate surface 201 to the second plate surface 202, and lubricate the bearing on the second plate surface 202 side. In this way, during the rotation of the gear, both sides of the gear have lubricating oil, thereby effectively lubricating the bearings on both sides of the gear, and the lubrication effect is good.

[0051] At the same time, since the first plate surface 201 and the second plate surface 202 are both concave relative to the inner ring 100 and the outer ring 300, that is, the first plate surface 201 of the connecting plate 200 is retracted in the outer ring 300, the two form an oil return groove 003. During the rotation of the gear, part of the lubricating oil is located in the oil return groove 003, and under the action of centrifugal force, the lubricating oil contacts the inner wall surface of the inner ring 100 instead of being directly thrown out of the gear. It can enter the first oil guide groove 210 under the obstruction and guidance of the inner wall surface of the outer ring 300, participate in lubrication, and improve the lubrication effect of the bearing.

[0052] The following embodiments illustrate the details of the noise reduction and oil guide gears for new energy vehicles provided in this application by way of examples.

[0053] In this embodiment, the inner ring 100, the connecting plate 200 and the outer ring 300 can be set as an integrated structure, that is, the gear is manufactured by an integrated processing method, the overall structure has high strength, is not easily damaged during use, and has a long service life. In addition, it is suitable for mass production, thereby reducing production costs.

[0054] Among them, the inner ring 100 can be set as a cylindrical tube structure, and a mounting hole 101 is set in the middle of the inner ring 100. The mounting hole 101 is a circular hole. An internal spline 110 is set on the hole wall of the mounting hole 101. A chamfer is set on one side of the internal spline 110, so as to facilitate the insertion of the rotating shaft matched with the internal spline 110 into the mounting hole 101. The external spline on the rotating shaft has a good alignment effect with the internal spline 110, and it is not easy to have a bias pressure, which reduces the damage to the internal spline 110 and the external spline during the assembly process. In addition, chamfers can be set on both sides of the internal spline 110, and the rotating shaft can be plugged in from one side of the inner ring 100 as needed, which reduces the difficulty of operation and improves the assembly efficiency.

[0055] Optionally, grooves are provided on the first plate surface 201 and the second plate surface 202 of the connecting plate 200, so that the connecting plate 200 is a concave-convex plate. The connecting plate 200 has high structural strength, long service life, good support effect on the outer ring 300, is not easy to deform, is not easy to affect the meshing accuracy between gears, and is not easy to make abnormal noises when the gears rotate, thereby reducing the noise generated during operation. The shape and size of the first oil guide groove 210 and the second oil guide groove 220 can be set to be the same, which is convenient for processing. At the same time, the number of the first oil guide groove 210 and the second oil guide groove 220 is equal. For example, in this embodiment, the number of the first oil guide groove 210 and the second oil guide groove 220 is four. A plurality of first oil guiding grooves 210 and a plurality of second oil guiding grooves 220 are alternately arranged in sequence in the circumferential direction of the inner ring 100 or the outer ring 300, that is, there is a second oil guiding groove 220 between adjacent first oil guiding grooves 210, and there is a first oil guiding groove 210 between adjacent second oil guiding grooves 220, so that adjacent first oil guiding grooves 210 and second oil guiding grooves 220 share a groove side wall.

[0056] Please combine Figure 1 and Figure 2 Furthermore, a through hole 230 is provided on the bottom wall of the first oil guide groove 210, and a through hole 230 is provided on the bottom wall of the second oil guide groove 220. The position of the through hole 230 is designed so that the lubricating oil can directly pass through the through hole 230 after entering the first oil guide groove 210 and the second oil guide groove 220, thereby reducing the obstruction of the lubricating oil flowing on both sides of the gear, facilitating the lubricating oil to flow back and forth on both sides of the gear, and facilitating the lubrication of the bearings on both sides of the gear. In addition, due to the concave design of the connecting plate 200, for example, the through hole 230 provided on the bottom wall of the second oil guide groove 220 is located on the first plate surface 201, and the first plate surface 201 is retracted relative to the outer ring 300 and cooperates with the outer ring 300 to define the oil return groove 003, the lubricating oil can stay on the first plate surface 201, and the lubricating oil can easily enter the second oil guide groove 220 through the through hole 230 provided on the bottom wall of the second oil guide groove 220, thereby increasing the flow rate of the lubricating oil. Similarly, the lubricating oil on the second plate surface 202 of the connecting plate 200 can easily enter the first oil guiding groove 210 through the through hole 230 on the bottom wall of the first oil guiding groove 210 .

[0057] Please combine Figure 3Optionally, the shape and position of the through hole 230 of the first oil guide groove 210 are taken as an example for further explanation. The shape and position of the through hole 230 on the second oil guide groove 220 can refer to the design of the through hole 230 on the first oil guide groove 210. The through hole 230 is set as a variable diameter hole, and the width of the through hole 230 gradually increases in the direction from the inner ring 100 to the outer ring 300. The width direction of the through hole 230 is consistent with the circumference of the inner ring 100. The shape of the through hole 230 is similar to that of the first oil guide groove 210, which can ensure that the distance between the four sides of the through hole 230 and the groove wall of the four sides of the first oil guide groove 210 is close. After the hole is opened, the weight of the gear can be reduced, and the width of the position of the groove bottom wall that is not opened can be ensured to be consistent. The connecting plate 200 has high structural strength, strong bearing capacity and long service life. Further, the distance between the second groove wall 212 and the hole wall of the through hole 230 is set to L1, 10mm≤L1≤15mm, for example, the distance between the second groove wall 212 and the hole wall of the through hole 230 can be 10mm, 12.5mm or 15mm, etc. The distance between the inner circumference of the outer ring 300 and the hole wall of the through hole 230 is set to L2, 10mm≤L2≤15mm, for example, the distance between the inner circumference of the outer ring 300 and the hole wall of the through hole 230 can be 10mm, 12.5mm or 15mm, etc. The distance between the outer circumference of the inner ring 100 and the hole wall of the through hole 230 is set to L3, 8mm≤L3≤15mm, for example, the distance between the outer circumference of the inner ring 100 and the hole wall of the through hole 230 can be set to 8mm, 11.5mm or 15mm, etc.

[0058] In other embodiments, optionally, a through hole 230 may be provided on the groove side wall shared by the adjacent first oil guide groove 210 and the second oil guide groove 220. During the gear rotation process, the lubricating oil is in the first oil guide groove 210, and the lubricating oil moves under the push of the second groove wall 212. Part of the lubricating oil can be stirred and move in a direction away from the first plate surface 201, that is, it leaves the first oil guide groove 210 from the groove opening of the first oil guide groove 210 to lubricate the bearing at the first plate surface 201. At the same time, since the through hole 230 is provided on the groove side wall, part of the lubricating oil can also directly enter the second oil guide groove 220 through the through hole 230, thereby lubricating the bearing close to the second plate surface 202, thereby improving the lubrication efficiency and lubrication effect of the bearing.

[0059] Optionally, the distance between the first plate surface 201 and the second plate surface 202 is H1, the distance between the first plate surface 201 and the side surface of the inner ring 100 close to the first plate surface 201 is H2, the depth of the first oil guide groove 210 is set to H3, the distance between the bottom wall of the first oil guide groove 210 and the second plate surface 202 is H4, the axial dimension of the inner ring 100 is L, L / 2

[0060] Optionally, the second groove wall 212 of the first oil guide groove 210 is set to a concave arc surface, and the radius of the circle where the second groove wall 212 is located is set to R, 45mm≤R≤50mm. For example, in this embodiment, the radius of the circle where the second groove wall 212 is located can be set to 45mm, 47.5mm or 50mm.

[0061] The noise reduction and oil guide gear for new energy vehicles provided in this embodiment improves the structure of the connecting plate 200, and designs the connecting plate 200 as a concave-convex plate structure. The connecting plate 200 is not only light in weight, but also high in strength, and is not easily deformed or damaged during operation. The gear is stable and reliable during operation with low noise. At the same time, the connecting plate 200 is formed with a first oil guide groove 210 and a through hole 230. The second groove wall 212 of the first oil guide groove 210 and the helical tooth groove 310 of the outer ring 300 guide the lubricating oil in the opposite direction, so that the bearings on both sides of the gear can be lubricated, the lubrication effect of the bearings can be improved, and the service life of the bearings can be extended. The operating conditions of the bearings on both sides are basically the same, ensuring the stability and reliability of the gear operation.

[0062] This embodiment also provides a gear reduction box, which includes the noise reduction and oil guide gears for new energy vehicles of the above-mentioned embodiment, and has at least the advantages of low noise and good bearing lubrication effect.

[0063] 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 noise reduction and oil guide gear for new energy vehicles, characterized in that: include: An inner ring (100), a connecting plate (200) and an outer ring (300), wherein the inner ring (100) is provided with a mounting hole (101) for plugging a transmission shaft; the connecting plate (200) is located between the inner ring (100) and the outer ring (300), and the connecting plate (200) is connected to both the outer circumference of the inner ring (100) and the inner circumference of the outer ring (300); The connecting plate (200) comprises a first plate surface (201) and a second plate surface (202) which are opposite to each other in the axial direction of the inner ring (100), and the first plate surface (201) and the second plate surface (202) are both concave relative to the inner ring (100) and the outer ring (300); a plurality of first oil guide grooves (210) arranged at intervals around the axis of the inner ring (100) are provided on the first plate surface (201), and each of the first oil guide grooves (210) comprises a first groove wall (211) and a second groove wall (212) which are arranged at intervals in a first rotation direction (001), and the first groove wall (211) is located at the first rotation direction (001). In front of the second groove wall (212), the second groove wall (212) is configured as an inner concave arc surface, and a plurality of the second groove walls (212) form a spiral structure arranged in the first rotation direction (001); the second plate surface (202) is provided with a plurality of second oil guide grooves (220) arranged at intervals around the axis of the inner ring (100), and the plurality of first oil guide grooves (210) and the plurality of second oil guide grooves (220) are alternately arranged in the circumferential direction of the inner ring (100); the connecting plate (200) is provided with a through hole (230) for conducting the first plate surface (201) and the second plate surface (202); The outer peripheral surface of the outer ring (300) is provided with helical tooth grooves (310) arranged in a second rotation direction (002) opposite to the first rotation direction (001); When the gear rotates along the first rotation direction (001), the helical tooth groove (310) can guide the lubricating oil from the first plate surface (201) to the second plate surface (202), and the first oil guide groove (210) can guide the lubricating oil in a direction away from the first plate surface (201).

2. The noise reduction and oil guide gear for new energy vehicles according to claim 1 is characterized in that: The through hole (230) is provided on the bottom wall of the first oil guide groove (210).

3. The noise reduction and oil guide gear for new energy vehicles according to claim 2 is characterized in that: The distance between the second groove wall (212) and the hole wall of the through hole (230) is set to L1, 10 mm ≤ L1 ≤ 15 mm; The distance between the inner circumferential surface of the outer ring (300) and the hole wall of the through hole (230) is set to L2, 10mm≤L2≤15mm; The distance between the outer peripheral surface of the inner ring (100) and the hole wall of the through hole (230) is set to L3, 8mm≤L3≤15mm.

4. The noise reduction and oil guide gear for new energy vehicles according to claim 2 is characterized in that: The through hole (230) is configured as a variable diameter hole, and the width of the through hole (230) gradually increases in the direction from the inner ring (100) to the outer ring (300), and the width direction of the through hole (230) is consistent with the circumferential direction of the inner ring (100).

5. The noise reduction and oil guide gear for new energy vehicles according to claim 1, characterized in that: The through hole (230) is provided on the bottom wall of the second oil guide groove (220).

6. The noise reduction and oil guide gear for new energy vehicles according to claim 5, characterized in that: The through hole (230) is provided on a groove side wall shared by the adjacent first oil guiding groove (210) and the second oil guiding groove (220).

7. The noise reduction and oil guide gear for new energy vehicles according to claim 4, characterized in that: The distance between the first plate surface (201) and the second plate surface (202) is H1, the distance between the first plate surface (201) and the side surface of the inner ring (100) close to the first plate surface (201) is H2, the depth of the first oil guide groove (210) is set to H3, the distance between the bottom wall of the first oil guide groove (210) and the second plate surface (202) is H4, and the axial dimension of the inner ring (100) is L, L / 2<H1<L, L / 6<H4<L / 4, 0<H2<L / 4.

8. The noise reduction and oil guide gear for new energy vehicles according to claim 1, characterized in that: The second groove wall (212) is configured as an inwardly concave arc surface, and the radius of the circle where the second groove wall (212) is located is configured as R, 45 mm ≤ R ≤ 50 mm.

9. The noise reduction and oil guide gear for new energy vehicles according to claim 1, characterized in that: An internal spline (110) is provided on the hole wall of the mounting hole (101).

10. A gear reduction box, characterized in that: The gear reduction box comprises: The noise reduction and oil guide gear for new energy vehicles as described in any one of claims 1 to 9.

Images