CN2325582Y

CN2325582Y - Universal coupling having slidably-interengaging teeth

Info

Publication number: CN2325582Y
Application number: CN 98223397
Authority: CN
Inventors: 刘重康; 周易文
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-06
Filing date: 1998-03-06
Publication date: 1999-06-23
Anticipated expiration: 2008-03-06

Abstract

The utility model relates to a universal coupling having slidably-interengaging teeth, mainly solving the problem of shorter service life. The utility model is characterized in that a universal coupling and an intermediate body are hollow, and the universal coupling is composed of an upper casing and a lower casing. One end of the upper casing is provided with slidably-interengaging teeth whose width is increased gradually from the tooth tips to the tooth roots. One end of the lower shell casing is also provided with slidably-interengaging teeth anastomosing with the slidably-interengaging teeth on the upper casing. The upper casing is engaged with the lower casing through the slidably-interengaging teeth. The other end of the lower casing is fixed on the intermediate body, and the other end of the intermediate body is fixed on a lower casing of the other universal coupling. A flexible lever penetrates through the hollow universal coupling, the intermediate body and the other universal coupling. The both ends of the flexible lever are respectively fixed with the upper casings of the universal coupling and the other universal coupling.

Description

A kind of tooth petal type cardan shaft

The utility model relates to a kind of tooth petal type cardan shaft.

In exploration such as oil, geology, use helicoid hydraulic motor to bore directional well or horizontal well in a large number, wherein stearable assemly should be finished positioning operation, finishes hold angle again, entangles operation such as orientation, therefore, cardan shaft need be installed in helicoid hydraulic motor.

In prior art (with reference to Fig. 1), the universal joint of cardan shaft commonly used is the slot that cuts into the Ω shape on a hollow steel pipe surface, be three flaps, because the width of tooth top is greater than the width of tooth root, so it both can bear moment of torsion, can bear pulling force again, this cardan shaft is simple in structure, but, this tooth lobe stressed unreasonable, minimum place just is the biggest place that is subjected to moment of flexure in tooth lobe cross section, so the nearly root of Ω shape tooth lobe ruptures easily, and, this Ω shape tooth lobe slot place only about 2MM, can not implement the wear resistance process treating, so its flank very easily weares and teares, to Ω shape tooth lobe is thrown off mutually, working life is shorter.

The purpose of this utility model provides long tooth petal type cardan shaft in a kind of working life.

The utility model is by universal joint, composition such as intermediate and rods, it is characterized in that: universal joint and intermediate hollow, universal joint is made up of upper shell and lower shell body, one end of upper shell has the tooth lobe, the width of tooth lobe is increased to tooth root gradually by crown, one end of lower shell body also has the tooth lobe that the tooth lobe with upper shell matches, upper shell is meshed with the tooth lobe of lower shell body by the tooth lobe, the other end of lower shell body is fixed on the intermediate, the other end of intermediate is fixed on the lower shell body of another universal joint, rods is passed the universal joint of hollow, intermediate and another universal joint, its two ends fix with the upper shell of universal joint and another universal joint respectively.

Because the utility model universal joint and intermediate hollow, universal joint is made up of upper shell and lower shell body, one end of upper shell has the tooth lobe, the width of tooth lobe is increased to tooth root gradually by crown, one end of lower shell body also has the tooth lobe that the tooth lobe with upper shell matches, upper shell is meshed with the tooth lobe of lower shell body by the tooth lobe, the other end of lower shell body is fixed on the intermediate, the other end of intermediate is fixed on the lower shell body of another universal joint, so when transmitting torque, the tooth lobe width at the stressed place of tooth lobe compares broad, easy-rupturing not, long service life, and because rods is passed the universal joint of hollow, intermediate and another universal joint, its two ends fix with the upper shell of universal joint and another universal joint respectively, so the upper shell of universal joint and lower casing physical efficiency are meshing with each other well, can not throw off, again because universal joint can be divided into two bodies adding man-hour, so its tooth lobe can fully be implemented wear resistance technology, thus the life-span of improving cardan shaft.

Below in conjunction with accompanying drawing the utility model is elaborated,

Fig. 1 is the structural representation of the universal joint of existing cardan shaft,

Fig. 2 is the structural representation of a kind of cardan shaft of the utility model,

Fig. 3 is the structural representation of the another kind of cardan shaft of the utility model,

Fig. 4 is the structural representation of universal joint of the present utility model,

With reference to Fig. 2, Fig. 4,1 expression universal joint among the figure, universal joint and intermediate 2 hollows, universal joint is made up of upper shell 3 and lower shell body 4, one end of upper shell has tooth lobe 5, the width of tooth lobe is increased to tooth root gradually by crown, one end of lower shell body also has the tooth lobe that the tooth lobe with upper shell matches, upper shell is meshed with the tooth lobe of lower shell body by the tooth lobe, the other end of lower shell body is fixed on the intermediate, the other end of intermediate is fixed with the lower shell body of another universal joint, rods 6 is passed the universal joint of hollow, intermediate and another universal joint, its two ends fix with the upper shell of universal joint and another universal joint respectively, lay lining 7 between universal joint and rods, lay packing ring 8 between lining and intermediate.

With reference to Fig. 3, between universal joint and rods, lay ball seat 9, steel ball 10 hollows, the steel ball string is on rods 6 and be placed in the ball seat.

Claims

1, a kind of tooth petal type cardan shaft, comprise universal joint, intermediate and rods, it is characterized in that: universal joint and intermediate hollow, universal joint is made up of upper shell and lower shell body, one end of upper shell has the tooth lobe, the width of tooth lobe is increased to tooth root gradually by crown, one end of lower shell body also has the tooth lobe that the tooth lobe with upper shell matches, upper shell is meshed with the tooth lobe of lower shell body by the tooth lobe, the other end of lower shell body is fixed on the intermediate, the other end of intermediate is fixed on the lower shell body of another universal joint, and rods is passed the universal joint of hollow, intermediate and another universal joint, its two ends fix with the upper shell of universal joint and another universal joint respectively.

2, according to right 1 described a kind of tooth petal type cardan shaft, it is characterized in that: between universal joint and rods, lay ball seat, steel ball hollow, the steel ball string is on rods and be placed in the ball seat.