CN2300756Y

CN2300756Y - Telescopic cardan shaft

Info

Publication number: CN2300756Y
Application number: CN 96241438
Authority: CN
Inventors: 臧其吉; 孙琼; 李国顺
Original assignee: Cars Locomotive & Car Research Institute
Current assignee: Cars Locomotive & Car Research Institute
Priority date: 1996-10-24
Filing date: 1996-10-24
Publication date: 1998-12-16
Anticipated expiration: 2006-10-24

Abstract

The utility model relates to a telescopic cardan shaft which is provided with an intermediate shaft (2) whose one end is provided with an ordinary cross shaft universal joint (1). The utility model is characterized in that the other end of the intermediate shaft is provided with a universal joint (3) which is rolling telescopic. The utility model comprises a fork (8) fixed on the intermediate shaft (2), a cross shaft (9) rotatablely connected with the fork (8), a rotatable roller (10) on the other countershaft on the cross shaft (9), a sleeve (11) outside the roller (10), and an axial race ring (13) on the sleeve (11) matched with the roller (10). The roller rolls in the race ring to complete telescoping function and transmit torsion. The utility model has the advantages of light weight of the cardan shaft, simple structure, telescopic friction force reduction when the utility model is telescoped and vibration reduction when the utility model is rotated.

Description

Telescopic cardan shaft

The utility model relates to coupling, clutch, break; Be particularly related to coupling.

Universal drive shaft is a kind of parts commonly used in transmission, universal drive shaft now mainly contains Cardon universal joint, ball cage (fork) formula etc., and with the universal-joint-pin type universal axle because of simple in structure, easy to manufacture and use commonplace, when requiring the transmission of angle variation and length change function (as the power transmission of vehicle), generally be two ends with two Hooke's joints, but make two transmission shaft deflection several angles, its Telescopic is then realized with spline in the centre, this structure, because the friction factor when spline is flexible is bigger, thereby transmission efficiency is low, and flexible dumb, influence the position of jack shaft, and make jack shaft and master, the angle of driven shaft does not wait and influences the steady of transmission revolution even produce vibration.

For reducing the friction of splined shaft, make it flexibly flexible, the cardan shaft that has three-jaw and roller to roll in the raceway of overcoat on the axle has appearred using, but this cardan shaft, the weight of jack shaft is big, matching gap slightly greatly then can produce the outstanding phenomenon of scratching when high speed rotating, can produce vibration and " rope skipping " phenomenon when promptly rotating, influence proper functioning, so accuracy of manufacturing requires high, the maintenance difficulty, the life-span is short.

The purpose of this utility model provides a kind of flexibly flexible, simple in structure, lightweight telescopic cardan shaft.

The purpose of this utility model realizes by following technological scheme, telescopic cardan shaft has jack shaft, one end of jack shaft has by the jaw that is fixed on jack shaft, the rotating cross axle that is connected in this jaw, be connected in the Hooke's joint that another jaw of this cross axle is formed rotationally, it is characterized in that having the flexible universal joint that to roll at the other end of said jack shaft, this flexible universal joint that can roll comprises the jaw that is fixed on jack shaft, with the rotating cross axle that is connected of jaw, another that is loaded on cross axle is to the rotating roller on the axle, roller is connected with the axle sleeve with the axial raceway that matches with roller outward, jack shaft one end of axle sleeve is connected with oil sealing, and the other end is connected with the link that is connected with transmission shaft.

When telescopic cardan shaft is connected between two transmission shafts with this, then have two Hooke's joints, can satisfy the requirement that angle changes and rotating speed equates, and the roller on a pair of axle of a cross axle, in the raceway of axle sleeve, roll, can satisfy the variation requirement on the length.

Telescopic cardan shaft of the present utility model can reduce axially movable frictional force, thereby flexibly flexible, because extending means and former cross axle merge, has simplified mechanism, and has alleviated weight.

Below, in conjunction with the accompanying drawings and embodiments telescopic cardan shaft of the present utility model is explained in detail.

Fig. 1 is the sectional view of the telescopic cardan shaft of the utility model;

Fig. 2 is the sectional view along B-B face among Fig. 1 of the telescopic cardan shaft of the utility model.

As Fig. 1 Fig. 2, this telescopic cardan shaft has jack shaft 2, the two ends of jack shaft 2 respectively are fixed with the jaw 6 of a coordination, 8, the rotating cross axle 5 that is connected with common universal joint on the jaw 6, rotating another jaw 4 that is connected with on the cross 5, form a common Hooke's joint 1,4 of jaws link to each other with one of transmission shaft, 8 of the jaws of jack shaft 2 the other ends are formed the flexible universal joint 3 that can roll, its structure is: the rotating cross axle 9 that is connected with of the connection method that jaw 8 usefulness are general (as using bearing), the a pair of axle of cross axle 9 links to each other with the arm of jaw 8, another of cross axle is to respectively being equipped with rotating roller 10 on the axle, axle sleeve 11 is housed outside roller 10, two axial raceways 13 that symmetry is arranged on the axle sleeve 11, the fitting surface of the outer surface of roller 10 and raceway 13 matches and merges and can roll in raceway and slide, axle sleeve 11 1 ends are connected with link 12 (as flange or other coupling), it can link to each other with another transmission shaft, the middle axle head of axle sleeve 11 is connected with oil sealing 7, roller 10 matches with raceway 13 and merges and can roll in raceway and slide, then cross axle 9 relatively axle sleeve 11 move axially, therefore but and transmitting torque, but played the effect of the removable and transmitting torque of splined shaft cardan shaft and three-jaw roller cardan shaft.

The outer surface of roller 10 can adopt the cylndrical surface, the fitting surface of raceway 13 then has the flute profile raceway that straight wall, bottom have the bottom surface for both sides, this moment will match with the bottom surface of two raceways 13 in the outer end of two rollers, so that the centres of the center of cross axle 9 and axle sleeve 11, the outer surface of roller 10 preferably has spherical outer surface, the raceway 13 of Pei Heing has cylindrical form interior surface with it, and the center that can make cross axle 9 keeps concentric with the center of axle sleeve 11 in machining accuracy.

Oil sealing 7 can adopt common skeleton oil sealing, preferably adopts as the collapsible scalable oil sealing of Fig. 1 axle is all protected; Can prevent that part in axle 2 and the universal joint 3 from being polluted by dirt and wear and tear and guarantees sufficient lubricating.

Telescopic cardan shaft of the present utility model, the splined shaft portion of scalable slip is moved on the universal joint, splined shaft and universal joint cross are merged, simple in structure, and make jack shaft 2 weight alleviate greatly, therefore reduced the total weight of cardan shaft, its telescopic section is nearer from fixing transmission axle head, thereby when axle was longer, vibrative possibility reduced greatly, particularly realized elongation and shortening by roller and raceway, significantly reduced frictional force than splined shaft, flexible flexibility and reliability so can significantly reduce maintenance and accident, improves transmission efficiency.

Claims

1, a kind of telescopic cardan shaft, has jack shaft (2), one end of jack shaft (2) has by the jaw that is fixed on jack shaft (2) (6), the rotating cross axle (5) that is connected in jaw (6), the Hooke's joint (1) that rotating another jaw (4) that is connected in cross axle (5) is formed, it is characterized in that having the flexible universal joint (3) that to roll at the other end of said jack shaft (2), this flexible universal joint (3) that can roll comprises the jaw (8) that is fixed on jack shaft (2), the cross axle (9) that is rotatably connected with jaw (8), another that is loaded on cross axle (9) is to the rotating roller (10) on the axle, the outer axle sleeve (11) that is connected with of roller (10) with the axial raceway (13) that matches with roller (10), jack shaft one end of axle sleeve (11) is connected with oil sealing (7), and the other end is connected with link (12).

2, by the described telescopic cardan shaft of claim 1, it is characterized in that said roller (10) has spherical outer surface, the raceway of Pei Heing (13) has cylindrical form interior surface with it.

3, by claim 1 or 2 described telescopic cardan shafts, it is characterized in that said oil sealing (7) is collapsible scalable oil sealing.