High-rotating-speed electric vehicle reduction gear planetary carrier

Abstract

The application provides a high-speed electric vehicle reduction gearbox planet carrier, comprising a connected mounting body and a guide body, the mounting body is used for rotatable cooperation with a reduction gearbox shell; the guide body is provided with a first guide inclined surface for guiding the flow of lubricating oil, and the first guide inclined surface is arranged at an acute angle or an obtuse angle with the rotation axis of the mounting body. During the operation of the gear box, the planet carrier can guide the lubricating oil to flow towards the gear and other components, thereby directly acting on the gear to lubricate the meshing position of the gear, the lubricating effect is good, and the gear box is not prone to failure.

Description

Technical Field

[0001] This invention relates to the field of gearboxes, and more specifically, to a planetary carrier for a high-speed electric vehicle reducer. Background Technology

[0002] Currently, most planetary gearboxes used in vehicles employ splash lubrication. The lubricating oil is set to a suitable level within the gearbox, and the rotation of the planetary carrier or ring gear agitates the oil for lubrication and cooling. However, with the development of new energy vehicles, motor speeds are increasing. If there is too much oil in the gearbox, the oil agitation loss becomes increasingly significant, severely impacting transmission efficiency. If there is too little oil, at high speeds, the planetary gears will agitate most of the lubricating oil, filling the entire gearbox. Furthermore, the lubricating oil adhering to the gears will be flung off the gear surfaces under the centrifugal force at high speeds, making it difficult to provide sufficient lubrication to the gear meshing positions. Therefore, traditional splash lubrication methods are insufficient to meet the lubrication and cooling requirements of high-speed planetary gearboxes. Additionally, in existing technologies, the oil in the gearbox does not easily reach the gear meshing positions, affecting lubrication effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide a planetary carrier for a high-speed electric vehicle reducer that can guide oil to a set position, thereby enhancing the lubrication effect.

[0004] The embodiments of the present invention are implemented as follows:

[0005] This invention provides a planetary carrier for a high-speed electric vehicle reducer, comprising:

[0006] The mounting body and the guide body are connected. The mounting body is used to rotatably engage with the reducer housing. The guide body is provided with a first guide slope for guiding the flow of lubricating oil. The first guide slope is set at an acute or obtuse angle to the rotation axis of the mounting body.

[0007] In an optional embodiment, the guide body has a groove on the mounting side away from the mounting body, the bottom wall of the groove intersects the rotation axis, and the first guide inclined surface is provided on the groove peripheral wall, and the first guide inclined surface is set at an acute angle to the rotation axis.

[0008] In an optional embodiment, multiple first guide ramps are provided, and the multiple first guide ramps are arranged at intervals in the circumferential direction of the groove.

[0009] In an optional embodiment, the first guide ramp is configured as an annular surface extending circumferentially along the groove.

[0010] In an optional embodiment, the guide body is further provided with a second guide slope for guiding the flow of lubricating oil, and the first guide slope and the second guide slope have an included angle.

[0011] In an optional embodiment, a partition groove is further provided on the end face of the guide body away from the mounting body. One end of the partition groove extends to the inner peripheral wall of the groove to communicate with the groove, and the other end of the partition groove extends to the outer peripheral surface of the guide body to form a notch for splashing oil outward. The second guide slope is provided on the bottom wall of the partition groove.

[0012] In an optional embodiment, the outer peripheral surface of the guide is configured as a gradually deformed peripheral surface, and the cross-sectional area of ​​the outer peripheral surface gradually decreases in the direction from the bottom of the groove to the opening of the groove, so as to reduce the amount of lubricating oil in the groove adhering to the side wall of the partition groove when it is thrown out of the partition groove.

[0013] In an optional embodiment, there are multiple first guide ramps and multiple second guide ramps, and the multiple first guide ramps and multiple second guide ramps are alternately arranged in the circumferential direction of the groove.

[0014] In an optional embodiment, the plurality of first guide ramps and the plurality of second guide ramps are arranged in a wavy pattern.

[0015] In an optional embodiment, the mounting body and the guide body are configured as an integral structure.

[0016] In an optional embodiment, the end face of the mounting body opposite to the guide body is provided with a cavity, the guide body is formed at the extension end of the cavity and protrudes from the mounting body along the depth direction of the cavity.

[0017] The beneficial effects of the embodiments of the present invention are:

[0018] In summary, the planetary carrier of the high-speed electric vehicle reducer provided in this embodiment is assembled inside the gearbox as a component of the gearbox. During gearbox operation, when lubricating oil is introduced into the gearbox housing, the lubricating oil contacts the guide body. Guided by the first guide slope on the guide body, the lubricating oil moves directly towards the gear meshing position, achieving precise lubrication, i.e., achieving the effect of fixed-point lubrication. The lubricating oil can be delivered to the lubrication position inside the gearbox in a timely and effective manner, resulting in good lubrication effect. The gearbox is less prone to failure during use, has high performance, long service life, and saves costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the planetary carrier of the high-speed electric vehicle reducer according to an embodiment of the present invention;

[0021] Figure 2 This is a partial structural schematic diagram of the planetary carrier of the high-speed electric vehicle reducer according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the flow guiding structure of the guide body according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a modified example of the guide body according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram illustrating the application of the planetary carrier of the high-speed electric vehicle reducer in an embodiment of the present invention.

[0025] icon:

[0026] 001-Sun gear; 100-Mounting body; 110-First mounting through hole; 200-Guide body; 210-First guide slope; 220-Groove; 230-Second guide slope; 240-Separating groove; 241-Groove sidewall; 250-Outer circumferential surface; 300-Connecting bracket; 310-Disc; 311-Second mounting through hole; 320-Support plate; 330-Protruding ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply 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.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Currently, gearbox lubrication involves introducing lubricating oil into the gearbox and relying on the centrifugal force generated by the rotation of gears and other components inside to splash the oil, thus achieving lubrication and cooling of the internal components. However, with the increasing sophistication of high-speed electric vehicles, the gears inside the gearbox rotate at high speeds. Under the strong centrifugal force, the lubricating oil is primarily concentrated on the inner wall of the gearbox, failing to effectively lubricate the gears and other components, making the gearbox prone to malfunction.

[0034] In view of this, the designers have designed a planetary carrier for a high-speed electric vehicle reducer that can guide lubricating oil to flow toward components such as gears, thereby acting directly on the gears and lubricating the meshing positions of the gears. This results in good lubrication and reduces the likelihood of gearbox failure.

[0035] Please see Figure 1 and Figure 2In this embodiment, the planetary carrier of the high-speed electric vehicle reducer includes a connected mounting body 100 and a guide body 200. The mounting body 100 is used to rotatably engage with the reducer housing. The guide body 200 is provided with a first guide slope 210 for guiding the flow of lubricating oil. The first guide slope 210 is set at an acute angle or an obtuse angle with the rotation axis of the mounting body 100.

[0036] The working principle of the planetary carrier provided in this embodiment is as follows:

[0037] The planetary carrier of the high-speed electric vehicle reducer provided in this embodiment is assembled inside the gearbox as a component of the gearbox. During gearbox operation, when lubricating oil is introduced into the gearbox housing, the lubricating oil comes into contact with the guide body 200. Guided by the first guide slope 210 on the guide body 200, the lubricating oil moves directly toward the gear meshing position, achieving precise lubrication, that is, achieving the effect of fixed-point lubrication. The lubricating oil can be delivered to the lubrication position in the gearbox in a timely and effective manner, resulting in good lubrication effect. The gearbox is less prone to failure during use, has high performance, long service life, and saves costs.

[0038] Please combine Figure 5 For example, in this embodiment, the planetary carrier is engaged with the sun gear 001, which has an oil injection hole in the middle. The extension direction of the through hole is coaxial with the rotation axis of the mounting body 100. Under forced lubrication, the lubricating oil can be ejected from the oil injection hole in the middle of the sun gear 001 and directly shot towards the guide body 200. When the lubricating oil is shot towards the guide body 200, the lubricating oil changes its flow direction and is thrown outward under the action of the first guide inclined surface 210, so that the lubricating oil moves towards the gear meshing position under the guidance of the first guide inclined surface 210, and performs fixed-point lubrication on the rotating parts in the gearbox, with good lubrication effect.

[0039] In this embodiment, optionally, the mounting body 100 and the guide body 200 can be integrally formed, that is, the planetary carrier is an integral structure with high structural strength, not easily damaged during use, and long service life. Optionally, the mounting body 100 is approximately a disc 310 body, having a first end face and a second end face. The first end face is a conical surface, and the second end face is a circular surface. The first end face is also a concave conical surface, thus saving manufacturing materials while maintaining the structural strength of the mounting body 100. The guide body 200 is located on the second end face. The guide body 200 and the mounting body 100 are coaxially arranged, resulting in balanced forces and smoother rotation. Furthermore, the mounting body 100 is provided with three first mounting through holes 110 extending along its rotation axis. These three first mounting through holes 110 are evenly spaced around the rotation axis of the mounting body 100, and each first mounting through hole 110 is used to insert a locating pin connecting the planetary gears. It should be understood that in other embodiments, the number of first mounting through holes 110 is not limited to three. In this embodiment, they are not listed one by one. Correspondingly, the number of planetary gears is not limited to three. The number of planetary gears and the number of first mounting through holes 110 can be equal and correspond one-to-one.

[0040] Furthermore, the planetary carrier includes a connecting frame 300 connected to the mounting body 100. The connecting frame 300 includes a disk 310 and three support plates 320. The disk 310 and the mounting body 100 are opposite to each other and spaced apart. One side of each of the three support plates 320 is connected to the mounting body 100, and the other side is connected to the disk 310. The three support plates 320 are evenly spaced apart in the circumferential direction of the rotation axis of the mounting body 100. The disk 310 is provided with three second mounting through holes 311 corresponding to the three first mounting through holes 110. A connecting pin is installed in each of the first mounting through holes 110 and the second mounting through hole 311. At the same time, a convex ring 330 is provided on the disk 310. A bearing is sleeved on the convex ring 330 and rotatably connected to the housing of the gearbox through the bearing. The sun gear 001 can pass through the convex ring 330 and deliver lubricating oil to the location of the guide body 200.

[0041] Furthermore, the end face of the mounting body 100 opposite to the guide body 200 is provided with a cavity, which is a circular groove and is coaxially arranged with the mounting body 100. The guide body 200 is formed at the extension end of the cavity. This design makes the planetary carrier more compact, increases the probability of lubricating oil splashing onto the gear meshing point, and indirectly reduces the size of the reducer. At the same time, the center of gravity of the planetary carrier is closer to the middle, resulting in better dynamic balance during rotation. The bearings on both sides are less prone to wear, and the guide body 200 is closer to the oil injection hole for forced lubrication, avoiding excessive waste of lubricating oil kinetic energy.

[0042] In this embodiment, optionally, the side of the guide body 200 facing away from the mounting body 100 is designated as the mounting side. A groove 220 is provided on the mounting side, and the bottom wall of the groove 220 intersects the rotation axis. For example, in this embodiment, the bottom wall of the groove 220 is perpendicular to the rotation axis of the mounting body 100, and the rotation axis passes through the center of the groove 220. A first guide slope 210 is provided on the peripheral wall of the groove 220, and the first guide slope 210 is set at an acute angle to the rotation axis; that is, the distance between the first guide slope 210 and the rotation axis gradually decreases from the groove opening to the groove bottom. Thus, the lubricating oil is first guided into the groove 220, and then ejected in a predetermined direction under the action of the first guide slope 210.

[0043] Optionally, multiple first guide slopes 210 are provided, and the multiple first guide slopes 210 are arranged at intervals in the circumferential direction of the groove 220. In this way, lubricating oil can be sprayed out from multiple directions, improving lubrication efficiency.

[0044] In other embodiments, the first guide slope 210 can be set as one, and the first guide slope 210 is an annular surface, that is, the entire groove periphery of the groove 220 is set as the first guide slope 210.

[0045] Please combine Figure 2 and Figure 3 In this embodiment, optionally, the guide body 200 is further provided with a second guide slope 230 for guiding the flow of lubricating oil, and the first guide slope 210 and the second guide slope 230 have an included angle. Optionally, there are multiple second guide slopes 230, which are arranged at intervals around the rotation axis of the mounting body 100, and the multiple first guide slopes 210 and the multiple second guide slopes 230 are arranged alternately. For example, in this embodiment, there are four first guide slopes 210 and four second guide slopes 230.

[0046] Furthermore, the end face of the guide body 200 facing away from the mounting body 100 is provided with a plurality of partition grooves 240 communicating with the groove 220. Specifically, one end of the partition groove 240 extends to the inner peripheral wall of the groove 220 to communicate with the groove 220, and the other end of the partition groove 240 extends to the outer peripheral surface 250 of the guide body 200 to form a notch for splashing oil outward; the second guide slope 230 is provided on the bottom wall of the partition groove 240.

[0047] Please combine Figure 4In other embodiments, both the first guide slope 210 and the second guide slope 230 are located on the mounting side, and the plurality of first guide slopes 210 and the plurality of second guide slopes 230 are alternately arranged in the circumferential direction of the rotation axis of the mounting body 100, resembling a wave-like surface. This results in a smooth connection between the first guide slopes 210 and the second guide slopes 230, facilitating manufacturing and improving the guiding effect of lubricating oil. Specifically, the first guide slope 210 is located on the crest surface, and the second guide slope 230 is located on the trough surface.

[0048] Furthermore, please combine Figure 2 The outer peripheral surface 250 of the guide body 200 is configured as a gradually deformed peripheral surface. The cross-sectional area of ​​the outer peripheral surface 250 gradually decreases from the bottom of the groove 220 to the opening of the groove 220. This reduces the amount of lubricating oil adhering to the sidewall 241 of the partition groove 240 when it is thrown out of the partition groove 240. Most of the lubricating oil can be directly thrown out from the bottom wall of the partition groove 240, i.e., the second guide inclined surface 230, without affecting the lubrication effect. In other words, by making the outer peripheral surface 250 of the guide body 200 gradually deformed, the surface area of ​​the sidewall 241 of the partition groove 240 is reduced. The area of ​​the sidewall 241 in contact with the lubricating fluid is small, making it less likely for lubricating oil to adhere to the sidewall 241, thus not reducing the amount of lubricating oil thrown out of the partition groove 240, and therefore not affecting the lubrication effect. For example, in this embodiment, the outer peripheral surface 250 of the guide body 200 is approximately a conical surface, with a regular structure, which is easy to process and manufacture, and has little impact on the lubrication effect.

[0049] Please combine Figure 5 The planetary carrier provided in this embodiment can receive lubricating oil introduced from the sun gear 001 during operation. The lubricating oil output port of the sun gear 001 is located in the area enclosed by the groove 220. The lubricating oil is concentratedly sprayed into the groove 220, and the flow direction of the lubricating oil is changed by the first guide slope 210 and the second guide slope 230 provided on the guide body 200, thereby lubricating different positions inside the gearbox. Specifically, the lubricating oil guided by the first guide slope 210 can lubricate the meshing position of the sun gear 001 and the planet gears; the lubricating oil guided by the second guide slope 230 can lubricate the meshing position of the planet gears and the internal gear ring. That is to say, after the lubricating oil contacts the planetary carrier, it is concentrated and splashed at multiple different angles, resulting in good lubrication effect and improving the problem of poor lubrication effect in the ordinary splash lubrication design of the prior art. Furthermore, since the lubricating oil is concentratedly sprayed into the groove 220, the flow direction can be adjusted in a timely and effective manner by the first guide slope 210 and the second guide slope 230, reducing power loss and improving the lubrication effect.

[0050] The planetary carrier of the high-speed electric vehicle reducer provided in this embodiment can spray lubricating oil in a set direction, thereby achieving point-to-point lubrication and good lubrication effect.

[0051] This embodiment also provides a gearbox, including the planetary carrier of the high-speed electric vehicle reducer described above. During operation, the internal components of the gearbox have good lubrication, stable and reliable performance, are not prone to failure, have a long service life, and low operating costs.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-speed electric vehicle reduction gearbox planetary carrier, characterized by, The utility model relates to a high-speed electric vehicle reduction gear planet carrier, comprising: a mounting body connected with the planet carrier and used for rotatably matching with a reduction gear housing, and a guide body provided with a first guide slope for guiding lubricating oil flow and arranged at an acute angle or an obtuse angle with respect to a rotation axis of the mounting body; a recess is arranged on an end surface of the guide body away from the mounting body, a bottom wall of the recess intersects with the rotation axis, and the first guide slope is arranged on a peripheral wall of the recess and arranged at an acute angle with respect to the rotation axis; the planet carrier comprises a connecting frame connected with the mounting body, the connecting frame comprises a disc and three supporting plates, the disc and the mounting body are oppositely and spacedly arranged, one side of each of the three supporting plates is connected with the mounting body, the other side is connected with the disc, and the three supporting plates are spacedly arranged in a circumferential direction of the rotation axis of the mounting body.

2. The high-speed electric vehicle reduction gear planet carrier according to claim 1, wherein: a plurality of the first guide slopes are arranged in the circumferential direction of the recess.

3. The high-speed electric vehicle reduction gear planet carrier according to claim 1, wherein: the first guide slope is arranged as an annular surface extending in the circumferential direction of the recess.

4. The high-speed electric vehicle reduction gear planet carrier according to claim 1, wherein: the guide body is further provided with a second guide slope for guiding lubricating oil flow, and the first guide slope and the second guide slope have an included angle.

5. The high-speed electric vehicle reduction gear planet carrier according to claim 4, wherein: an end surface of the guide body away from the mounting body is further provided with a separation groove, one end of the separation groove extends to an inner peripheral wall of the recess to communicate with the recess, the other end of the separation groove extends to an outer peripheral surface of the guide body to form a gap for flinging oil outward, and the second guide slope is arranged on a bottom wall of the separation groove.

6. The high-speed electric vehicle reduction gear planet carrier according to claim 5, wherein: the outer peripheral surface of the guide body is arranged as a gradually changing peripheral surface, a cross-sectional area of the outer peripheral surface gradually decreases in a direction from a bottom of the recess to a slot opening of the recess, so as to reduce the amount of oil adhering to a groove side wall of the separation groove when lubricating oil in the recess is flung out of the separation groove.

7. The high-speed electric vehicle reduction gear planet carrier according to claim 4, wherein: the first guide slope and the second guide slope are both a plurality of guide slopes, and the plurality of first guide slopes and the plurality of second guide slopes are alternately arranged in the circumferential direction of the recess.

8. The high-speed electric vehicle reduction gear planet carrier according to claim 7, wherein: the plurality of first guide slopes and the plurality of second guide slopes are arranged in a wave shape.

9. The high-speed electric vehicle reduction gear planet carrier according to claim 1, wherein: an end surface of the mounting body away from the guide body is provided with a recessed cavity, the guide body is formed at an extended end of the recessed cavity and protrudes from the mounting body in a depth direction of the recessed cavity.

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