CN2259525Y

CN2259525Y - Ball universal joint transmission shaft

Info

Publication number: CN2259525Y
Application number: CN 95237894
Authority: CN
Inventors: 刘炳南; 张公福
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 1995-10-26
Filing date: 1995-10-26
Publication date: 1997-08-13
Anticipated expiration: 2005-10-26

Abstract

The utility model discloses a ball universal joint transmission shaft, which is composed of a ball joint, a ball pivot and a torsion ball. The utility model is characterized in that the spherical surface of the ball joint is provided with a groove with an arced section. Two ball sockets corresponding to the groove are arranged on the inner surface of the ball pivot. The torsion ball is positioned between the ball sockets and the groove. Because the torsion ball is used for transferring power and the torsion ball can slide in the groove, the utility model has the advantages of large transfer torque, large shaft offset angle (3DEG-45DEG) and smooth transfer. The utility model is suitable for various occasions for transferring power. The utility model also has the advantages of simple structure, easy fabrication and low cost.

Description

The ball Cardan shaft

A kind of invention about the ball Cardan shaft belongs to the mechanical device of transferring power.

Industrial, transferring power has various ways, as the Hooke's joint transmission shaft, and the pot joint transmission shaft, and the rzeppa universal joint transmission shaft etc., be modal several.The Hooke's joint transmission shaft is because simple in structure, volume is little, axle drift angle big (5 °-35 °), be widely used, but this structure exists the little and inconstant shortcoming of angular velocity of moment of torsion, and the needle bearing of cross axle damages transmission shaft owing to seal dirts such as bad, easy water of infiltration and dust easily.The pot joint transmission shaft structure is simple, can transmit bigger torsion, but also exists volume big, axle drift angle little (1 °-5 °), and slide block is that face contact with homalocephalus, friction factor is big, lubricates and seals shortcomings such as bad.In order to overcome above-mentioned shortcoming, the Cardan shaft that a kind of Rzeppa type occurred, this transmission shaft is made up of ball-joint and ball pivot, steel ball, nationality is housed to transmit torsion between ball-joint and ball pivot, it is big that this transmission shaft transmits torsion, can realize the constant speed transmission, be fit to advantages such as high speed rotating, six road grooves be arranged but lay the torsion ball on the ball-joint, its machining accuracy height, complex process, the cost height has limited and has applied.

The purpose of this utility model just provides that a kind of volume is little, and transmitting torque is big, and the transmission shaft drift angle is big, and stable drive is fit to run up, and simple in structure, technology is simple and easy to do, the ball Cardan shaft that cost of production is low.

To achieve these goals, the utility model proposes a kind of design of ball Cardan shaft, this ball Cardan shaft is made up of ball-joint, ball pivot torsion ball etc., it is characterized in that being processed with the groove of one section arc section at the sphere upper edge of ball-joint axial direction, internal surface at cylindrical ball pivot has two ball-and-sockets, and the torsion ball is placed between ball-and-socket and the groove.

Adopt the ball Cardan shaft of this structure, system transmits torsion with the torsion ball, the torsion ball can slide in groove, thereby it is big to have a transmitting torque, axle drift angle big (3 °-45 °), stable drive, advantages such as the occasion that is fit to run up are so the utility model can be used for the various different transmissions that require, as metallurgical machinery, construction machine, transportation machineries etc. add that the utility model is simple in structure, and are easy to process, cost of production is reduced greatly, so the utility model have good popularizing prospect.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:

Fig. 1 be a kind of embodiment of the utility model ball Cardan shaft schematic representation.

Fig. 2,3,4 is respectively along the sectional view of A, B, C direction among Fig. 1.

1 is ball-joint among the figure, the 2nd, and ball pivot, the 3rd, the groove on the ball-joint, the 4th, torsion ball, the 5th, ball-and-socket, the 6th, thrust ball, the 7th, groove, the 8th, taper hole, the 9th, ball spacer bar.

As seen from the figure, the utility model has a spherical ball-joint 1, has processed groove 3 one at ball-joint 1 upper edge axial direction, and machined grooves 3 begins to the root of opposite side from the root of ball-joint 1.Ball pivot 2 is cylindrical bodys of a hollow, the surface is processed with two ball-and-sockets 5 symmetrically within it, torsion ball 4 is placed between ball-and-socket 5 and the groove 3, when ball-joint 1 rotates, promptly driving ball pivot 2 by torsion ball 4 rotates, because torsion ball 4 is placed in the groove 3, so when the relative position of ball-joint 1 and ball pivot 2 changes in transmission process, do not influence the transmission of torsion, again because 3 roots that terminate in ball-joint 1 of groove, so the sphere of activities of torsion ball 4 is very big, the axle drift angle maximum during transmission can reach 45 ° after measured.In order to prevent ball-joint 1 and the relative displacement of ball pivot 2 on axial direction, internal surface at ball pivot 2, ball-and-socket 5 is processed with twice groove 7 along the both sides of axis, be processed with the through hole 8 of taper along the wall thickness direction of ball pivot 2 at the middle part of groove 7, when ball-joint 1, ball pivot 2, after torsion ball 4 is installed together, can put into thrust ball 6 from taper hole 8, filling groove 7, thrust ball 6 promptly contacts with the sphere of ball-joint 1 after packing into, then the thrust ball spacer bar 9 of taper is squeezed in the taper hole 8, like this because the positioning action ball-joint 1 of thrust ball 6 just can not produce axial relative movement with ball pivot 2.Top at ball spacer bar 9 is processed with tapped hole, when transmission shaft need be dismantled, screws in tapped hole with a threaded stem, can extract ball spacer bar 9;

The ball Cardan shaft of present embodiment generally is used for big-and-middle-sized machine power transmission, for small-sized, miniature transmission shaft, the processing of the ball pivot internal surface comparison difficulty that just seems, in order to address this problem, the utility model proposes a kind of embodiment as shown in Figure 5, Fig. 6,7,8 is respectively along the sectional view of D, E, F direction among Fig. 5.

Different with Fig. 1 is, in such an embodiment ball pivot by ball cage 2 ' and cage cover 2 " forms; the ball-and-socket 5 of laying torsion ball 4 be ball cage 2 ' on two through holes; the groove of laying thrust 6 replaces with 6 through holes; the length reduction that is equivalent to each groove is the ball-and-socket of three passing hole types; promptly be with the method replacement of processing through hole in the cutting of ball pivot internal surface and the process of processing ball-and-socket, simplified technology greatly.It is very convenient to assemble this ball Cardan shaft, earlier with ball cage 2 ' be enclosed within on the ball-joint 1, in corresponding through hole, put into torsion ball 4 and thrust ball 6, the internal surface of " being pressed into ball cage 2 gets final product; fairly obvious; the diameter of torsion ball 4 and thrust ball 6 should carefully be selected, and makes it just in time overlap 2 with cage " is tangent then with cage cover 2, otherwise can influence the precision of transmission shaft.

Claims

1, a kind of ball Cardan shaft, form by ball-joint, ball pivot, torsion ball etc., it is characterized in that being processed with at the sphere upper edge of ball-joint axial direction the groove of one section arc section, at the internal surface of cylindrical ball pivot two ball-and-sockets are arranged, the torsion ball is placed between ball-and-socket and the groove.

2, ball Cardan shaft as claimed in claim 1, the ball-and-socket that it is characterized in that the ball pivot internal surface is the pit of a spherical surface.

3, as claim 1,2 described ball Cardan shafts, it is characterized in that being processed with the groove of twice arc section at the circumferencial direction of ball pivot internal surface, groove is positioned at the both sides of ball-and-socket, and the thrust ball is contained in the groove.

4, ball Cardan shaft as claimed in claim 1 is characterized in that ball pivot overlaps two-part drive fit by ball cage and cage and forms.

5, as claim 1,4 described ball Cardan shafts, the ball-and-socket that it is characterized in that laying the torsion ball is two through holes on the ball cage.

6, as claim 1,5 described ball Cardan shafts, it is characterized in that the both sides of ball-and-socket on the ball cage along the circumferential direction respectively are evenly equipped with three through holes, the thrust ball is placed in these six through holes.