CN211117522U

CN211117522U - Clutch device and planetary gearbox

Info

Publication number: CN211117522U
Application number: CN201921591999.6U
Authority: CN
Inventors: 龙念贤; 鄢万斌; 章勇华; 陈素姣
Original assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Current assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-07-28
Anticipated expiration: 2029-09-24

Abstract

The utility model relates to a clutch and planetary gearbox, for solving the problem that the vice outmost easy follow integral key shaft that comes off of friction among the current clutch, the utility model discloses construct a clutch and planetary gearbox, wherein clutch, the integral key shaft of being connected including first part, second end and first part, integral key shaft first end is provided with first external splines, first external splines with it is vice to be provided with the friction between the second part, and its characterized in that keeps away from the tip of first end at first external splines and is provided with the stop gear who encircles the integral key shaft, stop gear's diameter is greater than the vice hole diameter who closes on integral key shaft second end tip of friction. The utility model discloses in, because first external splines tip is provided with stop gear, no matter be that installation friction is vice and integral key shaft or during integral key shaft axial float, the steel sheet in the vice outside of friction all can not come off from the integral key shaft to easy to assemble and improve clutch's reliability.

Description

Clutch device and planetary gearbox

Technical Field

The utility model relates to a clutch, more specifically say, relate to a clutch and planetary gearbox.

Background

The clutch device is arranged in the gearbox as required by gear shifting, and comprises a spline shaft connected with the first part, a second part and a friction pair arranged between the first part and the second part, wherein the friction pair consists of friction plates and steel sheets, the friction plates and the steel sheets are alternately arranged at intervals, the friction plates are connected with an inner spline of the second part, and the steel sheets are connected with an outer spline of the spline shaft; or the steel sheet is connected with the inner spline of the second part, and the friction sheet is connected with the outer spline of the spline. The clutch is engaged when the hydraulic cylinder is extended to press the steel sheet and the friction plate, the first component and the second component have the same rotating speed, and when the hydraulic cylinder is retracted, the first component and the second component rotate respectively.

Because the space in the gearbox is limited, the sizes of all parts are very compact, the length of the spline shaft on the spline shaft is not too long, and basically, when the oil cylinder retracts, the friction plates or the steel sheets connected with the spline shaft just keep on the spline shaft and do not fall off. This requires that the spline shaft should have good axial position limitation, and if the play displacement of the spline shaft in the axial direction exceeds a certain value, it may cause the friction plate or steel sheet on the spline shaft at the outermost side of the friction pair to fall off from the spline end, thereby causing a failure. In addition, when the clutch device is installed, the steel sheet and the friction sheet are usually installed on the spline shaft firstly, then the spline shaft is connected with the first part, or the friction sheet or the steel sheet on the spline is connected with the second part, in the process, the outermost friction sheet or the steel sheet on the spline shaft is easy to fall off from the spline, and the problem of inconvenient installation is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is the problem that drops from the integral key shaft easily is vice outmost to friction among the current clutch for clutch and planetary transmission are provided, the vice outmost of friction can not follow the integral key shaft and drop among the clutch.

The utility model discloses a realize that the technical scheme of its purpose is like: a clutch device is constructed, and the clutch device comprises a first part, a second part and a spline shaft, wherein the second end of the spline shaft is connected with the first part, a first external spline is arranged at the first end of the spline shaft, a friction pair is arranged between the first external spline and the second part, the clutch device is characterized in that a limiting mechanism surrounding the spline shaft is arranged at the end part, far away from the first end, of the first external spline, and the diameter of the limiting mechanism is larger than the inner hole diameter of the end part, close to the second end of the spline shaft, of the friction pair. The utility model discloses in, because first external splines tip is provided with stop gear, no matter be that installation friction is vice and integral key shaft or during integral key shaft axial float, the steel sheet in the vice outside of friction all can not come off from the integral key shaft to easy to assemble and improve clutch's reliability.

In the above clutch device, the limit mechanism is composed of a protruding block protruding radially from the end of the spline tooth of the first external spline. Or the limiting mechanism is composed of a clamping groove formed in the end part of the first external spline and a clamping ring arranged in the clamping groove.

In the above-mentioned clutch, the second end of the spline shaft is provided with a second external spline connected with the internal spline of the first member. Further, a second limiting mechanism used for limiting contact with the end of the first component is arranged at the end part of the second external spline facing the first end of the spline shaft, surrounds the spline shaft, and is larger than the diameter of an inner hole of the first component internal spline in diameter. The second limiting mechanism consists of a retainer ring groove and a retainer ring arranged in the retainer ring groove; or the second limiting mechanism is composed of a convex ring or a step which surrounds the spline shaft and is integrated with the spline shaft. The outer diameter of the second external spline and the outer diameter of the second limiting mechanism are both smaller than the diameter of the spline shaft between the second external spline and the first end of the spline shaft. The second limiting mechanism is in contact with the first component, and axially limits the spline shaft to prevent the spline shaft from axially moving.

The utility model discloses a realize that the technical scheme of its purpose is like: a planetary gearbox is constructed, comprises a planetary mechanism and is characterized by further comprising the clutch device. Further, the first member is one of a sun gear, a carrier, and an outer ring gear in the planetary mechanism, and the second member is a fixed member that is stationary with respect to the planetary transmission housing, or a rotating member such as a transmission gear.

Compared with the prior art, the utility model discloses because first external splines tip is provided with stop gear, no matter be that installation friction is vice with the integral key shaft or when the integral key shaft axial float, the steel sheet in the vice outside of friction can not all come off from the integral key shaft to easy to assemble and improvement clutch's reliability.

Drawings

Fig. 1 is a schematic structural diagram of a clutch device in a planetary transmission of the present invention.

Fig. 2 is a schematic structural view of a spline shaft in the clutch device of the present invention.

Fig. 3 is a schematic structural diagram of the planetary transmission of the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

Fig. 3 shows a schematic structural diagram of the planetary transmission, wherein the clutch device is as shown in fig. 1, the clutch device comprises a first component, a second component provided with an internal spline, and a spline shaft 1 connected with the first component, a first end of the spline shaft 1 is provided with a first external spline 12, and a friction pair 5 is arranged between the first external spline and the second component. The first part is the sun gear 2 in the planetary mechanism and the second part is a rotary gear 4, for example an output shaft gear.

Spline shaft structure as shown in fig. 2, one end (right end in the figure) of the spline shaft 1 has a structure of a disk-shaped body 11, the end is a first end, the other end is a second end (left end in the figure), a first external spline 12 is arranged on the outer circumferential surface of the first end disk-shaped body 11, a radial projection 13 is arranged at the end of each external spline 12 far away from the second end (left end) of the spline shaft, and the projections 14 on each spline form an annular first limiting mechanism. A second male spline 15 is provided at the second end of the spline shaft 1, and a retainer groove in which a retainer ring 14 is provided at a position where the second male spline 15 is adjacent to the first end of the spline shaft (the disk-shaped body 11 on the spline shaft). And the diameter of the portion of the second end provided with the second male spline 15 (the diameter of the second male spline) is smaller than the spline shaft diameter of the portion between the first end of the spline shaft and the disk body 11 (i.e., the polish rod portion 16 between the first male spline and the second male spline), and the diameter of the retainer ring 14 is larger than the diameter of the spline shaft polish rod portion 16.

As shown in fig. 1, the sun gear 2 of the planetary mechanism is splined to the second end of the spline shaft 1, and the carrier 3 of the planetary mechanism is also rotatably mounted on the rotating shaft of the sun gear 2 through the first bearing 71. The rotating gear 4 is fixedly connected with the clutch oil cylinder through a bolt 8. The rotating gear 4 and the spline shaft 1 are coaxially installed, a friction pair 5 is arranged between the first external spline 12 of the spline shaft 1 and the rotating gear 4, the friction pair 5 comprises steel sheets 51 and friction sheets 52, the steel sheets 51 and the friction sheets 52 are alternately arranged at intervals in the axial direction, the friction sheets 52 are connected with the spline shaft 1, the steel sheets 51 are connected with the rotating gear 4 through a pin shaft 41, the pin shaft 41 plays a role of an internal spline, the steel sheets 51 and the rotating gear 4 rotate together in the circumferential direction, and meanwhile, the steel sheets 51 can also move axially along the pin shaft 41 in the axial direction. The clutch oil cylinder 6 comprises a cylinder body 61 and a piston 62, the cylinder body 61 is fixedly connected with the rotating gear 4 through a bolt 8, the oil cylinder piston 62 is in contact with the steel sheet 51 on the outermost side of the friction pair, the diameter of an inner hole of the steel sheet 51 on the outermost side is smaller than the outer diameter of the first limiting mechanism, and when an oil cavity between the piston 62 and the cylinder body 61 is filled with oil, the piston 62 extends out to tightly press the friction pair, so that the spline shaft 1 and the rotating gear 4 rotate together. The rotating gear 4 and the clutch oil cylinder 6 are fixedly connected to form a rotating body, two ends of the rotating body are respectively connected with the gearbox shell 9 through second bearings 72, and the gearbox shell 9 supports the rotating gear 4 to enable the rotating gear to rotate.

The utility model discloses in, install integral key shaft 1 with the friction pair 5, with

integral key shaft

1 and 4 coaxial arrangements of bull gear, be connected engaging cylinder 6 and bull gear 4 again, the tip of connecting back integral key shaft 1 is passed through third bearing 73 and is connected with engaging cylinder's cylinder body 61. After the installation is finished, the second end of the spline shaft 1 is connected with the sun gear 2 through the second external spline 15, and the clutch oil cylinder 6 is connected with the gearbox shell 9 through the second bearing 72. As shown in fig. 3, the first end of the spline shaft 1 is axially positioned relative to the transmission housing through the third bearing 73, the cylinder body of the clutch cylinder and the second bearing, so as to prevent the spline shaft from shifting to the right in fig. 3. The spline shaft is contacted with the end face of the sun wheel through the retainer ring, and the spline shaft is prevented from moving leftwards.

In this embodiment, the limiting mechanism may further be composed of a clamping groove disposed at an end portion of the first external spline and a snap ring disposed in the clamping groove. Similarly, second stop gear comprises bulge loop or the step that encircles the integral key shaft and with integral key shaft body structure, the utility model discloses because first external splines tip is provided with stop gear, no matter be the installation friction vice with the integral key shaft or when the integral key shaft axial float, the steel sheet in the vice outside of friction all can not come off from the integral key shaft to easy to assemble and improvement clutch's reliability.

Claims

1. The utility model provides a clutch, includes the integral key shaft that first part, second end and first part are connected, integral key shaft first end is provided with first external splines, first external splines with it is vice to be provided with the friction between the second part, and its characterized in that keeps away from the tip of first end at first external splines and is provided with the stop gear who encircles the integral key shaft, stop gear's diameter is greater than the vice hole diameter who closes on integral key shaft second end tip of friction.

2. The clutched device of claim 1, wherein the stop mechanism is comprised of a radially projecting tab at a spline tooth end of the first external spline.

3. The clutch device according to claim 1, wherein the limiting mechanism is composed of a clamping groove arranged at the end part of the first external spline and a clamping ring arranged in the clamping groove.

4. Clutch device according to any of claims 1 to 3, wherein the second end of the splined shaft is provided with a second external spline which is splined to the internal spline of the first part.

5. The clutched device of claim 4, wherein the second male spline is provided with a second stop mechanism at an end position towards the first end of the spline shaft for limiting contact with the first member end, the second stop mechanism encircling the spline shaft and having an outer diameter greater than the inner bore diameter of the first member female spline.

6. The clutched device of claim 5, wherein the second stop mechanism is comprised of a retainer groove and a retainer ring disposed in the retainer groove.

7. Clutch device according to claim 5, wherein the second limiting means is constituted by a collar or step surrounding and integral with the splined shaft.

8. Clutch device according to any of claims 5 to 7, wherein the outer diameter of the second male spline and the outer diameter of the second limiting means are each smaller than the diameter of the spline shaft between the second male spline and the first end of the spline shaft.

9. A planetary gearbox comprising a planetary mechanism, characterised by further comprising a clutch device according to any one of claims 1 to 8.

10. The planetary transmission according to claim 9, wherein the first member is one of a sun gear, a planet carrier, and an outer ring gear of a planetary mechanism and the second member is a rotating member or a member that is stationary with respect to a planetary transmission housing.