CN215891063U

CN215891063U - Lightweight planet carrier assembly structure

Info

Publication number: CN215891063U
Application number: CN202122090850.3U
Authority: CN
Inventors: 王凯; 骆文平; 王鹏川; 杨溢; 张建刚
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-22
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a lightweight planet carrier assembly structure, which comprises: the planet carrier, the planet shaft and the positioning pin; the planet carrier comprises a first disc, a second disc, a positioning pin hole and a cross beam; the first disc and the second disc are connected through a plurality of cross beams, a third through hole is formed in the center of the first disc, an output inner spline hole is formed in the center of the second disc, the center of the third through hole and the center of the output inner spline hole are oppositely arranged, the first disc is provided with a first through hole, the second disc is provided with a second through hole, and the planet shaft penetrates through the first through hole and the second through hole; the positioning pin hole is formed in one side of the first disc and communicated with the first through hole; the positioning pin is positioned in the positioning pin hole of the planet carrier to fix the planet shaft; the utility model solves the problems of heavy structure, redundant structure and the like of the planet wheel, and can meet the market development requirement of the small-torque gearbox.

Description

Lightweight planet carrier assembly structure

Technical Field

The utility model belongs to the field of machining, and relates to a lightweight planet carrier assembly structure.

Background

In the electric automobile market, the requirement of factories for lightweight of the transmission is higher and higher, so that new challenges are provided for the design of transmission parts. Nowadays, more and more gear boxes adopt a planet wheel structure, and the planet wheel structure has the advantages of compact structure, light weight, large transmission ratio, high efficiency, stable transmission and the like, and is particularly suitable for hybrid electric vehicles.

Planet carrier and axle etc. are the important part of planet wheel structure, and traditional planet carrier generally adopts steel, because the density of steel is great, and traditional planet carrier assembly structural design is redundant, so the planet wheel device often is comparatively heavy, and the gearbox quality of adopting its manufacturing is heavy, does not also possess market competition advantage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, provides a lightweight planet carrier assembly structure, solves the problems of heavy weight, redundant structure and the like of a planet gear structure, and meets the market development requirement of a small-torque gearbox.

In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:

a lightweight planet carrier assembly structure comprising: the planet carrier, the planet shaft and the positioning pin;

the planet carrier comprises a first disc, a second disc, a positioning pin hole and a cross beam;

the first disc and the second disc are connected through a plurality of cross beams, a third through hole is formed in the center of the first disc, an output inner spline hole is formed in the center of the second disc, and the center of the third through hole is opposite to the center of the output inner spline hole; a first through hole is formed in the first disc, a second through hole is formed in the second disc, and the planet shaft penetrates through the first through hole and the second through hole; the positioning pin hole is formed in one side of the first disc and communicated with the first through hole;

the positioning pin is positioned in the positioning pin hole of the planet carrier to fix the planet shaft.

The utility model is further improved in that:

the cross beam is in an I shape.

The center of the beam is provided with a trapezoidal weight-reducing through hole.

And reinforcing ribs are arranged on the outer ring of the output inner spline hole.

A first concave platform is arranged on the first disk, and a second concave platform is arranged on the second disk.

One end center of the planet shaft is provided with a lightening hole, and the other end is provided with a positioning pin hole.

The positioning pin adopts a hollow gap structure.

The planet carrier is made of high-strength aluminum alloy material.

And a fillet is arranged at the contact part of the cross beam and the first disc and the second disc.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a lightweight planet carrier assembly structure.A third disc and an output inner spline hole are respectively arranged at the centers of a first disc and a second disc of a planet carrier, and a planet shaft passes through a first through hole arranged on the first disc and a second through hole arranged on the second disc; the positioning pin is arranged in the positioning pin hole of the planet carrier to fix the planet shaft, the devices simplify the structure of the planet carrier and effectively reduce the weight of the planet carrier.

Furthermore, the cross beam of the planet carrier provided by the utility model adopts an I-shaped structure, and meanwhile, a fillet is designed at the contact position of the cross beam and the disc, so that the rigidity of the planet carrier in the torsion resistant direction is enhanced. The reinforcing ribs are arranged on the outer ring of the output internal spline, so that the strength of the planet carrier is ensured, and the weight of the planet carrier is reduced by adopting high-strength aluminum alloy materials. Concave surfaces are respectively arranged on the first disc and the second disc of the planet carrier and used for reducing the weight of the planet carrier, and meanwhile, weight reducing through holes are designed in the centers of the cross beams connected with the first disc and the second disc, so that the quality of the cross beams is effectively reduced, and the strength of the planet carrier is slightly influenced. The utility model solves the problems of heavy structure, redundant structure and the like of the planet wheel, and can meet the market development requirement of the small-torque gearbox.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 an assembly view of a lightweight planetary carrier of the present invention;

FIG. 2 is a schematic structural view of a lightweight planetary carrier according to the present invention;

FIG. 3 is another schematic structural diagram of the lightweight planetary carrier of the present invention;

FIG. 4 is a schematic view of a planet axle configuration of the present invention;

FIG. 5 is a schematic view of the locating pin of the present invention;

FIG. 6 is a stress cloud of a finite element analysis of the planet carrier of the present invention;

FIG. 7 is a cloud of torsional angular displacements from a finite element analysis of a planet carrier according to the present invention.

Wherein: 1-a planet carrier; 2-planet axis; 3-positioning pins; 4-a third via; 5-trapezoidal weight-reducing through holes; 6-a first disc; 7-a first concave stage; 8-a second disc; 9-rounding off; 10-reinforcing ribs; 11-a cross beam; 12-output internal splined bore; 13-a first via; 14-a second via; 15-second concave.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 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 present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, 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 embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model is described in further detail below with reference to the accompanying drawings:

referring to fig. 1-5, a lightweight planet carrier assembly structure includes: the planet carrier 1, the planet shaft 2 and the positioning pin 3;

the planet carrier 1 comprises a first disc 6, a second disc 8, a positioning pin hole and a cross beam 11;

the first disc 6 and the second disc 8 are connected through a plurality of cross beams 11, a third through hole 4 is formed in the center of the first disc 6, an output inner spline hole 12 is formed in the center of the second disc 8, and the center of the third through hole 4 is opposite to the center of the output inner spline hole 12; a first through hole 13 is formed in the first disc 6, a second through hole 14 is formed in the second disc 8, and the planet shaft 2 penetrates through the first through hole 13 and the second through hole 14; the positioning pin hole is formed in one side of the first disc 6 and communicated with the first through hole 13; the positioning pin 3 is positioned in the positioning pin hole of the planet carrier 1 to fix the planet shaft 2.

The cross beam 11 is in an I shape, the center of the cross beam 11 is provided with a trapezoidal weight reduction through hole 5, the outer ring of the output internal spline 12 is provided with a reinforcing rib 10, the first disc 6 is provided with a first concave table 7, the second disc 8 is provided with a second concave table 15, the center of one end of the planet shaft 2 is provided with a weight reduction hole, the other end of the planet shaft is provided with a positioning pin hole, the positioning pin 3 is of a hollow notch structure, the planet carrier 1 is made of high-strength aluminum alloy materials, and the contact part of the cross beam 11 and the first disc 6 and the second disc 8 is provided with a fillet 9.

The design process of the utility model is

The utility model provides a light planet carrier assembly structure, the mass of a planet carrier 1 accounts for 70% of the whole structure, the structure is a light main body structure, and the optimization thought comprises:

the first disc 6 and the second disc 8 on the planet carrier 1 are respectively provided with a first concave station 7 and a second concave station 15, and the center of a cross beam 11 connecting the first disc 6 and the second disc 8 on the planet carrier is provided with a trapezoidal weight-reducing through hole 5, so that the quality of the cross beam can be effectively reduced, and the strength influence on the planet carrier 1 is small. Planet carrier 1 adopts high strength aluminum alloy or more portable material to design the processing, considers the rigidity of aluminum alloy material relatively poor simultaneously, and design crossbeam 11 is "worker" font structure, and at crossbeam 11 and the contact department design fillet 9 of first disc 6 and second disc 8 simultaneously, strengthen the rigidity of planet carrier in antitorque direction. An output internal spline 12 is arranged on the second disk 8 of the planet carrier, and a reinforcing rib 10 is arranged on the outer ring of the spline to ensure the strength; a lightening hole is formed in the center of one end of the planet shaft 2, but the lightening hole is not suitable for being designed as a through hole, the design is also beneficial to bearing lubrication, and a positioning pin hole is formed in the other end of the planet shaft 2; the positioning pin 3 adopts a hollow gap structure, so that the installation is convenient, and the weight can be reduced. Devices outside the planet carrier assembly structure, such as gears, needle bearings and the like, can adopt standard parts and can be adopted at will according to design requirements.

FIG. 6 is a stress cloud chart of the lightweight planet carrier structure provided by the utility model when the torque is output by 10000Nm, wherein the safety coefficient is more than or equal to 1.9, and the strength requirement is met.

FIG. 7 is a schematic diagram of the torsion angular displacement of the lightweight planet carrier provided by the present invention, wherein the torsion rigidity value is greater than or equal to 2 × 10⁶Nm/rad is in the same order of magnitude as the torsional rigidity of the planet carrier before design, and meets the rigidity requirement of the planet carrier.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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. A lightweight planet carrier assembly structure, comprising: the planet carrier (1), the planet shaft (2) and the positioning pin (3);

the planet carrier (1) comprises a first disc (6), a second disc (8), a positioning pin hole and a cross beam (11);

the first disc (6) is connected with the second disc (8) through a plurality of cross beams (11), a third through hole (4) is formed in the center of the first disc (6), an output inner spline hole (12) is formed in the center of the second disc (8), and the center of the third through hole (4) is opposite to the center of the output inner spline hole (12); a first through hole (13) is formed in the first disc (6), a second through hole (14) is formed in the second disc (8), and the planet shaft (2) penetrates through the first through hole (13) and the second through hole (14); the positioning pin hole is formed in one side of the first disc (6) and communicated with the first through hole (13);

the positioning pin (3) is positioned in a positioning pin hole of the planet carrier (1) to fix the planet shaft (2).

2. A lightweight planet carrier assembly structure according to claim 1, wherein the cross member (11) is in the shape of an i.

3. A lightweight planet carrier assembly structure according to claim 1, characterized in that the center of the cross beam (11) is designed with a trapezoidal weight-reducing through hole (5).

4. A lightweight planet carrier assembly structure as set forth in claim 1, wherein the outer race of the output internally splined bore (12) is provided with reinforcing ribs (10).

5. A lightweight planet carrier assembly structure according to claim 1, wherein the first disc (6) is provided with first concave lands (7) and the second disc (8) is provided with second concave lands (15).

6. A lightweight planet carrier assembly structure as claimed in claim 1, wherein the planet shaft (2) has a lightening hole in the center of one end and a locating pin hole in the other end.

7. A lightweight planetary carrier assembly structure according to claim 1, wherein the positioning pin (3) has a hollow notch structure.

8. A lightweight planet carrier assembly structure according to claim 1, wherein the planet carrier (1) is made of high strength aluminum alloy material.

9. A lightweight planet carrier assembly structure according to claim 1, wherein the contact of the cross beam (11) with the first and second discs (6, 8) is provided with a rounded corner (9).