CN212055796U

CN212055796U - Planetary row for automatic transmission

Info

Publication number: CN212055796U
Application number: CN202020426877.8U
Authority: CN
Inventors: 李娟娟; 魏文书; 袁顺娟
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-12-01
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a planet row for an automatic transmission, which comprises a planet carrier, wherein the planet carrier is provided with a planet wheel shaft, the output end of the planet carrier is provided with a gear, the gear and the planet carrier are in spline interference connection, the connecting part of the gear and the planet carrier is provided with external spline teeth, and the output end of the planet carrier is provided with internal spline teeth; the gear and the planet carrier are in interference connection through the external spline teeth and the internal spline teeth, a planet wheel shaft hole is formed in the planet carrier at the output end, the planet wheel shaft is arranged in the planet wheel shaft hole, the outer end part of the planet wheel shaft hole is provided with a plug, and the connecting disc is removed; a connecting disc assembling hole and 12 bolt processing holes are eliminated on the planet carrier, and internal spline teeth are added; the gear is added with external spline teeth, so that the structure is simplified, and the welding procedure of the gear and the connecting disc is eliminated; the press mounting of the connecting disc and the planet carrier is removed; the gluing assembly of the first bolt is cancelled; the gluing assembly of the second bolt is cancelled, and only the press fit combination of the gear and the planet carrier is increased.

Description

Planetary row for automatic transmission

Technical Field

The utility model belongs to the technical field of automatic transmission, specifically speaking relates to an automatic planet row for derailleur.

Background

The planetary gear set is typically connected to an output pinion gear that transfers power from the transmission to the wheels through an output gearset. As shown in fig. 1 and 2, the conventional planet row includes a planet carrier 1, a sun gear 2 and planet gears 3, the planet carrier 1 at the output end is fixedly connected with a connecting disc 5 through a first bolt 4, and a gear 6 is welded outside the connecting disc 5.

In the process of implementing the invention, the inventor finds that the prior art has at least the following defects: (1) the parts are various and comprise 12 bolts, connecting plates and the like. (2) In the aspect of processing, the processing procedure of the planet carrier 1 is complicated, the connecting disc 5 and the planet carrier 1 are in transition fit, the required precision of the matching hole of the planet carrier 1 is high, internal threads need to be processed after the bolt holes of the first bolts 4 (total 8) and the second bolts 7 (total 4) are processed, and the number of procedures is large; the flatness and other requirements of the connecting disc 5 are high in precision, and the machining cost is high; the gear 6 and the connecting disc 5 are welded into an integrated welded assembly through a welding process.

(3) In the assembly aspect, after the planet row assembly is assembled, in the first step, welding components (a gear 6 and a connecting disc 5) are pressed into the planet carrier 1; a second part, 8 first bolts 4 are assembled by gluing; and thirdly, gluing and assembling 4 second bolts 7, wherein the assembling steps are more.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an automatic transmission is with planet row is provided, has overcome the defect that current planet row exists, adopts the utility model discloses a back is arranged to the planet, can simplify spare part structure by a wide margin, reduces the spare part processing degree of difficulty and the assembly degree of difficulty, can reduce the part kind simultaneously, all has great advantage to the cost in the aspect of spare part management, spare part processing and assembly.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a planet row for automatic transmission, includes planet carrier, sun gear, planet wheel, and the output of planet carrier is equipped with the gear, and the gear is spline interference connection with the planet carrier.

Furthermore, the connecting part of the gear and the planet carrier is provided with external spline teeth, and the output end of the planet carrier is provided with internal spline teeth;

the gear and the planet carrier are in interference connection through the external spline teeth and the internal spline teeth.

Furthermore, a planet wheel shaft hole is formed in the planet carrier of the output end, a planet wheel shaft is arranged in the planet wheel shaft hole, and a plug is arranged at the outer end part of the planet wheel shaft hole.

Further, the assembly comprising the planet wheels:

aligning the axis of the planet wheel with the axis of the planet wheel shaft hole of the planet carrier, and assembling the axis of the planet wheel with the axis of the planet wheel shaft hole of the planet carrier;

and aligning the central line of the planet wheel shaft with the central line of the planet wheel shaft hole, inserting the planet wheel shaft into the planet wheel shaft hole, aligning the pin hole on the side surface of the planet wheel shaft with the pin hole of the planet carrier, and positioning by using a cylindrical pin.

Further, the assembly of the sun gear is also included:

the central line of the sun gear is aligned with the central line of the planet carrier, the sun gear is arranged among the four groups of planet gears, and the gears are meshed.

Further, the assembly of the gear is also included:

the central line of the gear, the central line of the planet carrier and the central line of the sun gear are aligned and located on the same straight line, the tooth part of the external spline tooth and the tooth space of the internal spline tooth are assembled and are in interference connection through the external spline tooth and the internal spline tooth until the planet carrier is in contact with the root part of the external spline tooth.

Furthermore, the center line of the plug and the center line of the planet axle hole are positioned on the same straight line, and the planet axle hole is plugged in an interference manner by using the plug;

and finishing the assembly.

The utility model adopts the above technical scheme, compare with prior art, have following advantage: 1) removing the connecting disc; a connecting disc assembling hole and 12 bolt processing holes are eliminated on the planet carrier, and internal spline teeth are added; the gear is added with external spline teeth, and the structure is simplified.

2) The assembly is simplified, and the welding procedure of the gear and the connecting disc is eliminated; the press mounting of the connecting disc and the planet carrier is removed; the gluing assembly of the first bolt is cancelled; the gluing assembly of the second bolt is cancelled, and only the press fit combination of the gear and the planet carrier is increased.

3) The management is convenient, 4 kinds of parts (the connecting disc, the welding assembly of the gear and the connecting disc, the first bolt and the second bolt) are reduced, and the part management cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a planetary row for a conventional automatic transmission;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic structural view of a planetary row for an automatic transmission according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of FIG. 3;

fig. 5 is a schematic structural diagram of the embodiment of the present invention in which a gear is separated from a planet carrier;

in the figure, the position of the upper end of the main shaft,

1-planet carrier, 2-sun gear, 3-planet gear, 4-first bolt, 5-connecting disc, 6-gear, 7-second bolt, 8-plug, 9-planet gear shaft hole, 10-internal spline tooth, 11-external spline tooth and 12-planet gear shaft.

Detailed Description

In order to clearly understand the technical features, objects and effects of the present invention, the detailed embodiments of the present invention will be described with reference to the accompanying drawings, and those skilled in the art will understand that the following does not limit the scope of the present invention.

In the embodiment, as shown in fig. 3, 4, and 5, a planetary gear set for an automatic transmission includes a planet carrier 1, the planet carrier 1 has a sun gear 2, a planetary gear shaft 12, and a planetary gear 3, a gear 6 is fixed on the planet carrier 1 at an output end, an external spline tooth 11 is arranged at a connection portion of the gear 6 and the planet carrier 1, an internal spline tooth 10 is arranged on the planet carrier 1 at the output end, the gear 6 and the planet carrier 1 are in spline interference connection through the external spline tooth 11 and the internal spline tooth 10, the planet carrier 1 at the output end has a planetary gear shaft hole 9, the planetary gear shaft 12 is arranged in the planetary gear shaft hole 9, and a plug 8 is arranged at an outer end portion of the planetary gear.

The assembly process of the planet row comprises the following steps:

assembling the planet wheel 3: aligning the axes of the planet gears 3 with the axes of the planet gear shaft holes 9 of the planet carrier 1, assembling the axes at the positions of the planet gear shaft holes 9 of the planet carrier 1, and adopting the same assembling method for the other three groups of planet gears 3;

the central line of the planet wheel shaft 12 and the central line of the planet wheel shaft hole 9 are aligned, the planet wheel shaft 12 is inserted into the planet wheel shaft hole 9, the pin hole on the side surface of the planet wheel shaft 12 is aligned with the pin hole of the planet carrier 1, and the cylindrical pin is used for positioning.

Assembling the sun gear 2: aligning the central line of the sun gear 2 with the central line of the planet carrier 1, placing the sun gear 2 among the four groups of planet gears, and meshing the gears;

assembly of the gear 6: aligning the central line of the gear 6, the central line of the planet carrier 1 and the central line of the sun gear 2, locating on the same straight line, assembling the tooth part of the external spline tooth 11 and the tooth space of the internal spline tooth 10, and performing interference connection through the external spline tooth 11 and the internal spline tooth 10 to stably transmit torque until the planet carrier 1 is contacted with the root part of the external spline tooth 11;

the central line of the plug 8 and the central line of the planet axle hole 9 are positioned on the same straight line, and the planet axle hole 9 is plugged by the plug 8 in an interference manner, so that oil leakage is prevented;

and finishing the assembly.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. The utility model provides an automatic planet row for derailleur, includes planet carrier (1), sun gear (2), planet wheel (3), its characterized in that: the output end of the planet carrier (1) is provided with a gear (6), and the gear (6) is in spline interference connection with the planet carrier (1).

2. The planetary row for an automatic transmission according to claim 1, wherein: the connecting part of the gear (6) and the planet carrier (1) is provided with external spline teeth (11), and the output end of the planet carrier (1) is provided with internal spline teeth (10);

the gear (6) is in interference connection with the planet carrier (1) through the external spline teeth (11) and the internal spline teeth (10).

3. The planetary row for an automatic transmission according to claim 1, wherein: the planet carrier (1) at the output end is provided with a planet wheel shaft hole (9), a planet wheel shaft (12) is arranged in the planet wheel shaft hole (9), and the outer end part of the planet wheel shaft hole (9) is provided with a plug (8).