CN217502547U

CN217502547U - High-rotation-speed electric automobile speed reducer planet carrier

Info

Publication number: CN217502547U
Application number: CN202221326019.1U
Authority: CN
Inventors: 杜生超; 张晓超; 彭鹏; 沈彭; 鲁东; 姜才俊; 张涛
Original assignee: Nanjing Nangaochi New Energy Automobile Transmission Equipment Co ltd
Current assignee: Nanjing Nangaochi New Energy Automobile Transmission Equipment Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-27
Anticipated expiration: 2032-05-27

Abstract

The application provides a planet carrier of a high-rotation-speed electric automobile speed reducer, which comprises a mounting body and a guide body which are connected, wherein the mounting body is used for being rotatably matched with a speed reducer shell; the guide body is provided with a first guide inclined surface for guiding the flowing of lubricating oil, and the first guide inclined surface and the rotating axis of the mounting body are arranged in an acute angle or an obtuse angle. In the running process of the gear box, the planet carrier can guide lubricating oil to flow towards components such as gears, so that the lubricating oil can directly act on the gears to lubricate the meshing positions of the gears, the lubricating effect is good, and the gear box is not prone to failure.

Description

High-rotation-speed electric automobile speed reducer planet carrier

Technical Field

The utility model relates to a gear box field particularly, relates to a high rotational speed electric automobile speed reducer planet carrier.

Background

At present, a planetary reduction gearbox used on a vehicle is mostly subjected to splash lubrication, lubricating oil is arranged in a gear box to a proper oil level height and is stirred to lubricate and cool through the rotation of a planet carrier or a gear ring, but with the development of new energy vehicles, the rotating speed of a motor is higher and higher, if more oil is stored in the gear box, the oil stirring loss of the gear box is more and more obvious, and the transmission efficiency is seriously influenced; if the gear box in-stock oil is few, under high rotational speed state, the planet wheel can be stirred most lubricating oil, is full of whole gear box to adnexed lubricating oil can be thrown away from the flank of tooth under the effect of high rotational speed centrifugal force on the gear, is difficult to provide sufficient lubricating oil for the gear engagement position, therefore lubrication and cooling demand of high rotational speed planet gear box are hardly satisfied to traditional lubricated mode that splashes. Meanwhile, in the prior art, oil in the gear box is not easy to reach the gear meshing position, and the lubricating effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high rotational speed electric automobile speed reducer planet carrier, it can guide fluid to setting for the position to the lubricated effect of reinforcing.

The embodiment of the utility model is realized like this:

the utility model provides a high rotational speed electric automobile speed reducer planet carrier, include:

the device comprises a mounting body and a guide body which are connected, wherein the mounting body is used for being rotatably matched with a speed reducer shell; the guide body is provided with a first guide inclined surface for guiding the flowing of lubricating oil, and the first guide inclined surface and the rotating axis of the mounting body are arranged in an acute angle or an obtuse angle.

In an alternative embodiment, a groove is provided on a mounting side surface of the guide body facing away from the mounting body, a groove bottom wall of the groove intersects with the rotation axis, the first guide inclined surface is provided on a groove peripheral wall of the groove, and the first guide inclined surface is disposed at an acute angle with the rotation axis.

In an alternative embodiment, the first guiding inclined surface is provided in a plurality, and the plurality of first guiding inclined surfaces are arranged at intervals in the circumferential direction of the groove.

In an alternative embodiment, the first guide ramp is provided as an annular surface extending in the circumferential direction of the groove.

In an alternative embodiment, a second guiding inclined surface for guiding the flow of the lubricating oil is further arranged on the guiding body, and the first guiding inclined surface and the second guiding inclined surface form an included angle.

In an optional embodiment, a separation groove is further arranged on an end surface of the guide body, which faces away from the mounting body, one end of the separation groove extends to the inner peripheral wall of the groove to communicate with the groove, and the other end of the separation groove extends to the outer peripheral surface of the guide body to form a gap for throwing oil outwards; the second guide inclined surface is arranged on the groove bottom wall of the separation groove.

In an alternative embodiment, the outer circumferential surface of the guide body is provided as a tapered circumferential surface, and the cross-sectional area of the outer circumferential surface is gradually reduced in a direction from the groove bottom of the groove toward the notch of the groove to reduce the amount of oil adhering to the groove side wall of the separation groove when the lubricating oil in the groove is thrown out of the separation groove.

In an alternative embodiment, the number of the first guide slopes and the second guide slopes is plural, and the plural first guide slopes and the plural second guide slopes are alternately arranged in a circumferential direction of the groove.

In an alternative embodiment, the plurality of first guide slopes and the plurality of second guide slopes are arranged in a wave shape.

In an alternative embodiment, the mounting body and the guide body are provided as a one-piece structure.

In an alternative embodiment, a cavity is provided on an end surface of the mounting body facing away from the guide body, the guide body is formed at an extended end of the cavity, and is convexly provided on the mounting body along a depth direction of the cavity.

The embodiment of the utility model provides a beneficial effect is:

in summary, the planet carrier of the high-speed electric vehicle speed reducer provided by the embodiment is assembled in the gear box as a component of the gear box. In the gear box operation in-process, when lubricating oil was imported to the casing of gear box, lubricating oil and guide body contact, under the guide of the first guide inclined plane on the guide body, lubricating oil directly moves towards gear engagement's position, realizes accurate lubrication, also reaches fixed point lubricated effect promptly, lubricating oil can in time effectively be carried to treat lubricated position in the gear box, and lubricated effectual, the gear box is difficult for breaking down when using, and the performance is high, and is longe-lived, saves the cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a planet carrier of a high-speed electric vehicle speed reducer according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of a planetary carrier of a high-speed electric vehicle speed reducer according to an embodiment of the present invention;

fig. 3 is a schematic view of a flow guiding structure of a guiding body according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a modification of the guide body according to the embodiment of the present invention;

fig. 5 is an application schematic diagram of the planet carrier of the high-speed electric vehicle speed reducer according to the embodiment of the present invention.

Icon:

001-sun gear; 100-an installation body; 110 — a first mounting through hole; 200-a guide; 210-a first guiding ramp; 220-a groove; 230-a second guiding ramp; 240-separation groove; 241-groove side wall; 250-outer peripheral surface; 300-a connecting frame; 310-a disc; 311-second mounting through hole; 320-a support plate; 330-convex ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

At present, when the gear box is lubricated, lubricating oil is introduced into the gear box, and the lubricating oil splashes by the centrifugal force generated by the rotation of components such as gears in the gear box, so that the aims of lubricating the components in the gear box and cooling the components are fulfilled by the lubricating oil. However, as high-speed electric vehicles become mature, the rotation speed of the gears in the gear box is high, and the lubricating oil is basically located on the inner peripheral wall of the gear box under strong centrifugal force, so that the components such as the gears cannot be effectively lubricated, and the gear box is prone to failure.

In view of this, designers have designed a high-speed electric automobile speed reducer planet carrier, which can guide lubricating oil to flow towards components such as gears, so that the lubricating oil directly acts on the gears to lubricate the meshing positions of the gears, the lubricating effect is good, and the gear box is not easy to break down.

Referring to fig. 1 and fig. 2, in the present embodiment, the planet carrier of the high-speed electric vehicle speed reducer includes an installation body 100 and a guide body 200 connected to each other, where the installation body 100 is used for rotatably matching with a speed reducer housing; the guide body 200 is provided with a first guide slope 210 for guiding the flow of the lubricating oil, and the first guide slope 210 is disposed at an acute angle or an obtuse angle with the rotation axis of the mounting body 100.

The working principle of the planet carrier provided by the embodiment is as follows:

the planet carrier of the high-rotation-speed electric automobile speed reducer provided by the embodiment is assembled in the gear box as a component of the gear box. In the gear box operation in-process, when lubricating oil was imported to the casing of gear box, lubricating oil and guide body 200 contact, under the guide of first guide inclined plane 210 on guide body 200, lubricating oil directly moves towards gear engagement's position, realizes accurate lubrication, also reaches fixed point lubricated effect promptly, lubricating oil can in time effectively be carried to the gear box in treat lubricated position, it is lubricated effectual, the gear box is difficult for breaking down when using, high performance, long service life, save the cost.

Referring to fig. 5, for example, in the embodiment, the planet carrier is matched with the sun gear 001 having an oil injection hole at the middle position, the extending direction of the through hole is coaxial with the rotation axis of the mounting body 100, under the forced lubrication, the lubricating oil can be ejected from the oil injection hole at the middle position of the sun gear 001 and directly ejected to the guide body 200, and after the lubricating oil is ejected to the guide body 200, the flowing direction of the lubricating oil is changed and the lubricating oil is thrown outward under the action of the first guiding inclined plane 210, so that the lubricating oil moves toward the gear meshing position under the guidance of the first guiding inclined plane 210, and the rotating component in the gear box is lubricated at a fixed point, and the lubricating effect is good.

In this embodiment, optionally, the installation body 100 and the guide body 200 may be integrally formed, that is, the planet carrier is of an integral structure, and has high structural strength, low possibility of being damaged during use, and long service life. Optionally, the mounting body 100 is substantially a disk 310, and the mounting body 100 has a first end surface and a second end surface, the first end surface is a conical surface, the second end surface is a circular surface, and meanwhile, the first end surface is an inwardly concave conical surface, so that the structural strength of the mounting body 100 can be maintained while saving manufacturing materials of the mounting body 100. The guide body 200 is located on the second end face. The guide body 200 and the installation body 100 are coaxially arranged, so that the stress is balanced, and the rotation is more stable. Further, the mounting body 100 is provided with three first mounting through holes 110 extending along the rotation axis of the mounting body, the three first mounting through holes 110 are uniformly arranged around the rotation axis of the mounting body 100 at intervals, and each first mounting through hole 110 is used for being connected with a positioning pin of a planet wheel in an inserting manner. It should be understood that in other embodiments, the number of the first mounting through holes 110 is not limited to three, and in this embodiment, there is no one-to-one listing, and correspondingly, the number of the planet wheels is not limited to three, and the number of the planet wheels and the number of the first mounting through holes 110 are equal and correspond to each other.

Further, the planet carrier comprises a connecting frame 300 connected with the installation body 100, the connecting frame 300 comprises a disc 310 and three support plates 320, the disc 310 and the installation body 100 are arranged oppositely and at intervals, one side of each support plate 320 is connected with the installation body 100, the other side of each support plate 320 is connected with the disc 310, and the three support plates 320 are arranged at intervals uniformly in the circumferential direction of the rotation axis of the installation body 100. The disc 310 is provided with three second mounting through holes 311 corresponding to the three first mounting through holes 110, and a connecting pin is mounted in cooperation with one first mounting through hole 110 and one second mounting through hole 311. Meanwhile, a convex ring 330 is arranged on the disc 310, and a bearing is sleeved outside the convex ring 330 and is rotatably connected with the shell of the gear box through the bearing. And the sun gear 001 may be inserted into the protruding ring 330 and deliver the lubricant to the position of the guide body 200.

Further, the end surface of the installation body 100 departing from the guide body 200 is provided with a concave cavity, the concave cavity is a circular groove and is coaxially arranged with the installation body 100, and the guide body 200 is formed at the extending end of the concave cavity. By the design, the whole interior of the planet carrier is more compact, the probability that lubricating oil splashes to the meshing position of the gears is increased, and the size of the speed reducer is indirectly reduced; meanwhile, the gravity center of the planet carrier is close to the middle of the planet carrier, the dynamic balance is good in the rotating process, bearings on two sides of the planet carrier are not prone to abrasion, the distance between the guide body 200 and the oil spray hole for forced lubrication is closer, and the waste of too much lubricating oil kinetic energy is avoided.

In this embodiment, optionally, the side of the guide body 200 facing away from the mounting body 100 is a mounting side, a groove 220 is disposed on the mounting side, and the bottom wall of the groove 220 intersects with 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 position of the groove 220. The first guiding inclined surface 210 is provided on the groove peripheral wall of the groove 220, and the first guiding inclined surface 210 is disposed at an acute angle with respect to the rotation axis, that is, the distance from the rotation axis in the direction from the groove opening to the groove bottom is gradually reduced by the first guiding inclined surface 210. Thus, the lubricant is first guided into the groove 220 and then ejected in a set direction by the first guide slope 210.

Alternatively, the first guiding inclined surface 210 is provided in plural, and the plural first guiding inclined surfaces 210 are arranged at intervals in the circumferential direction of the groove 220. Therefore, the lubricating oil can be sprayed out from multiple directions, and the lubricating efficiency is improved.

In other embodiments, the first guiding slope 210 may be provided as one, and the first guiding slope 210 is an annular surface, i.e., the entire groove peripheral wall of the groove 220 is provided as the first guiding slope 210.

Referring to fig. 2 and 3, in the present embodiment, optionally, a second guiding inclined surface 230 for guiding the flow of the lubricating oil is further disposed on the guiding body 200, and the first guiding inclined surface 210 and the second guiding inclined surface 230 form an included angle. Alternatively, the number of the second guide slopes 230 is plural, the plural second guide slopes 230 are arranged at intervals around the rotational axis of the mounting body 100, and the plural first guide slopes 210 and the plural second guide slopes 230 are alternately arranged. For example, in the present embodiment, the number of the first guide slopes 210 and the second guide slopes 230 is four.

Further, the end surface of the guide body 200 facing away from the mounting body 100 is further provided with a plurality of separation grooves 240 communicated with the groove 220, specifically, one end of the separation groove 240 extends to the inner peripheral wall of the groove 220 to be communicated with the groove 220, and the other end of the separation groove 240 extends to the outer peripheral surface 250 of the guide body 200 to form a gap for throwing oil outwards; the second guide slope 230 is provided on the groove bottom wall of the separation groove 240.

Referring to fig. 4, in other embodiments, the first guiding inclined surfaces 210 and the second guiding inclined surfaces 230 are both disposed on the mounting side surface, and the plurality of first guiding inclined surfaces 210 and the plurality of second guiding inclined surfaces 230 are alternately arranged in the circumferential direction of the rotation axis of the mounting body 100 and resemble a wavy surface, so that the first guiding inclined surfaces 210 and the second guiding inclined surfaces 230 are smoothly connected, the processing and the manufacturing are convenient, and the guiding effect of the lubricating oil is good. Wherein the first guide slope 210 is on the peak surface and the second guide slope 230 is on the valley surface.

Further, referring to fig. 2, the outer circumferential surface 250 of the guide body 200 is configured as a gradually deformed circumferential surface, and the cross-sectional area of the outer circumferential surface 250 gradually decreases from the groove bottom of the groove 220 to the notch of the groove 220, so as to reduce the amount of oil attached to the groove sidewall 241 of the separation groove 240 when the lubricant in the groove 220 is thrown out from the separation groove 240, and most of the lubricant can be directly thrown out from the groove bottom wall of the separation groove 240, that is, the second guide inclined surface 230, without affecting the lubricating effect. That is, providing the outer peripheral surface 250 of the guide body 200 in a gradual change type can reduce the surface area of the groove side wall 241 of the partition groove 240, reduce the contact area of the groove side wall 241 with the lubricating liquid, make it difficult for the lubricating oil to adhere to the groove side wall 241, and does not reduce the amount of the lubricating oil thrown out from the partition groove 240, thereby not affecting the lubricating effect. For example, in the present embodiment, the outer peripheral surface 250 of the guide body 200 is substantially a conical surface, and has a regular structure, which facilitates manufacturing and has a small influence on the lubricating effect.

Referring to fig. 5, in the planet carrier provided in this embodiment, during operation, the planet carrier can receive the lubricant introduced from the sun gear 001, the lubricant output port of the sun gear 001 is located in the area surrounded by the groove 220, the lubricant is intensively sprayed into the groove 220, and the flow direction of the lubricant is changed by the first guide slope 210 and the second guide slope 230 provided on the guide body 200, so as to lubricate different positions inside the gear box. Specifically, the lubricating oil guided by the first guide slope 210 can be lubricated at the meshing position of the sun gear 001 and the planet gear; the lubricating oil guided by the second guide slope 230 can lubricate the meshing position of the planet gear and the ring gear. That is to say, lubricating oil contact planet carrier after, concentrate towards a plurality of different angles and get rid of oil, lubricated effectual, improved among the prior art problem that lubricated effect is poor in ordinary splash lubrication design. Moreover, since the lubricating oil is intensively sprayed into the groove 220, the flow direction can be timely and effectively adjusted by the first guide slope 210 and the second guide slope 230, so that the power loss is reduced, and the lubricating effect is good.

The high rotational speed electric automobile speed reducer planet carrier that this embodiment provided can spray lubricating oil according to the direction of setting for to realize the fixed point and lubricate, lubricated effectual.

The embodiment also provides a gear box, including foretell high rotational speed electric automobile speed reducer planet carrier, the lubricated effectual of gear box operation in-process internals, the stable performance is reliable, is difficult for breaking down, long service life, low in use cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high rotational speed electric automobile speed reducer planet carrier which characterized in that includes:

2. The high-speed electric vehicle reducer planet carrier of claim 1, wherein:

the end face, deviating from the installation body, of the guide body is provided with a groove, the groove bottom wall of the groove is intersected with the rotation axis, the first guide inclined plane is arranged on the groove peripheral wall of the groove, and the first guide inclined plane and the rotation axis are arranged in an acute angle.

3. The high-speed electric vehicle reducer planet carrier of claim 2, wherein:

the first guide inclined planes are arranged in a plurality of numbers, and the first guide inclined planes are arranged at intervals in the circumferential direction of the groove.

4. The high-speed electric vehicle reducer planet carrier of claim 2, wherein:

the first guide slope is provided as an annular face extending in the circumferential direction of the groove.

5. The high-speed electric vehicle reducer planet carrier of claim 2, wherein:

the guide body is further provided with a second guide inclined surface used for guiding the lubricating oil to flow, and an included angle is formed between the first guide inclined surface and the second guide inclined surface.

6. The high-speed electric vehicle reducer planet carrier of claim 5, wherein:

a separation groove is further formed in the end face, away from the installation body, of the guide body, one end of the separation groove extends to the inner peripheral wall of the groove to be communicated with the groove, and the other end of the separation groove extends to the outer peripheral face of the guide body to form a notch for throwing oil outwards; the second guide inclined surface is arranged on the groove bottom wall of the separation groove.

7. The high-speed electric vehicle reducer planet carrier of claim 6, wherein:

the outer peripheral surface of the guide body is a gradually-changed peripheral surface, and the cross-sectional area of the outer peripheral surface is gradually reduced in the direction from the groove bottom of the groove to the notch of the groove, so that the oil quantity attached to the side wall of the separation groove when the lubricating oil in the groove is thrown out of the separation groove is reduced.

8. The high-speed electric vehicle reducer planet carrier of claim 5, wherein:

the number of the first guide inclined surfaces and the number of the second guide inclined surfaces are multiple, and the multiple first guide inclined surfaces and the multiple second guide inclined surfaces are alternately arranged in the circumferential direction of the groove.

9. The high-speed electric vehicle reducer planet carrier of claim 8, wherein:

the first guide slopes and the second guide slopes are arranged in a wave shape.

10. The high-speed electric vehicle reducer planet carrier of claim 1, wherein:

the end face of the mounting body, which deviates from the guide body, is provided with a concave cavity, the guide body is formed at the extending end of the concave cavity, and is convexly arranged on the mounting body along the depth direction of the concave cavity.