CN102384175A

CN102384175A - Universal shaft with double lug bosses and crossed joint

Info

Publication number: CN102384175A
Application number: CN2011103023266A
Authority: CN
Inventors: 张成功
Original assignee: DONGYING RUIXU PETROLEUM TECHNOLOGY CO LTD
Current assignee: DONGYING RUIXU PETROLEUM TECHNOLOGY CO LTD
Priority date: 2011-09-23
Filing date: 2011-09-23
Publication date: 2012-03-21

Abstract

The invention discloses a universal shaft with double lug bosses and a crossed joint, which is characterized in that an upper crossed driving piece and a lower crossed driving piece are provided with aequilate grooves, the crossed joint is provided with an upper lug boss and a lower lug boss, the difference of the position angles of the upper lug boss and the lower lug boss is 90 degrees, one crossed joint is formed by the upper crossed driving piece, the crossed joint and the lower crossed driving piece in a splicing way, the lower part of the crossed joint is connected with the upper part of a connecting shaft, and the lower part of the connecting shaft is connected with one crossed joint. The bottom surface of the aequilate groove of the upper crossed driving piece is a downward concave arc surface, the top surface of the upper lug boss on the crossed joint is an upward convex arc surface, the radius of the downward concave arc surface is equal to the radius of the upward convex arc surface, and the downward concave arc surface and the upward convex arc surface are contacted; and the bottom surface of the aequilate groove of the lower crossed driving piece is an upward concave arc surface, the top surface of the lower lug boss on the crossed joint is a downward convex arc surface, the radius of the upward concave arc surface is equal to the radius of the downward convex arc surface, and the upward concave arc surface and the downward convex arc surface are contacted. Therefore, according to the invention, the contact stress is small when torque and axial force are transmitted, so that the universal shaft can not be fatigue to be damaged.

Description

Double polarizing keys cross joint cardan shaft

Technical field

The present invention is the corollary equipment on the helicoid hydraulic motor used of oil field drilling and repairing well, is a kind of double polarizing keys cross joint cardan shaft.

Background technique

Cardan shaft on the helicoid hydraulic motor of using on the drilling and repairing well of oil field has petal type cardan shaft, ball formula cardan shaft, the tooth-like cardan shaft of involute, scratches the shaft type cardan shaft; The shortcoming of these cardan shafts is to be the line contact or to put contact in moment of torsion transmission coupling place; Contact stress is very big; Easy fatigue and distortion make the parts damages on the cardan shaft fast, and the working life of cardan shaft is short; It is that universal joint on it will contact with mud that existing cardan shaft also has a shortcoming, contains abrasive material in the mud, has aggravated the wearing and tearing of cardan shaft upper-part; The operating life of general cardan shaft has only tens hours; Need often to change to continue drilling and repairing well, cause the drilling and repairing well inefficiency, completion period is long; The manpower and materials that drop into are many, deficiency in economic performance.

Summary of the invention

The objective of the invention is to design a kind of double polarizing keys cross joint cardan shaft, overcome the deficiency of existing technology, prolong its working life, increase economic efficiency.

The objective of the invention is to realize like this: comprise V shape driving component, cross joint, following V shape driving component, coupling shaft, last V shape driving component bottom has the East and West direction equal-width groove, and following V shape driving component top has the north-south equal-width groove; East and West direction equal-width groove, equal-width groove two side, north-south are the plane; On the cross joint convex platform, lower convex platform are arranged, convex platform, lower convex platform are in the two ends up and down of cross joint, and convex platform, lower convex platform parallactic angle differ 90 °; Convex platform, lower convex platform bi-side are the plane; Convex platform inserts in the East and West direction equal-width groove, and lower convex platform inserts in the equal-width groove of north-south, and last V shape driving component, cross joint, following V shape driving component are pegged graft into a cross joint; Following V shape driving component bottom on the cross joint is connected with coupling shaft top, and the coupling shaft bottom connects a cross joint again.

The East and West direction equal-width groove bottom surface that open last V shape driving component bottom is following spill arc face; The end face of the convex platform on the cross joint is a convex-shaped arc face; The radius of following spill arc face equates with the radius of convex-shaped arc face; Following spill arc face contacts with convex-shaped arc face, and the equal-width groove bottom surface, north-south that open on following V shape driving component top is last spill arc face, and the end face of the lower convex platform on the cross joint is following convex arc face; The radius of last spill arc face equates that with the radius of following convex arc face last spill arc face contacts with following convex arc face.

The outer closed hood that coats of cross joint.

The invention has the beneficial effects as follows: East and West direction equal-width groove, equal-width groove two side, north-south are the plane, and the convex platform that is mated, lower convex platform bi-side also are the plane, and their area of contact is big, during transmitting torque; Contact stress is little, can not be out of shape, can fatigue damage, and following spill arc face contacts with convex-shaped arc face; Last spill arc face contacts with following convex arc face, and their radius is equal, and area of contact is big, when transmitting axial force; Contact stress is little, can not be out of shape, can fatigue damage, therefore; The present invention can reach purpose of design, and is rational in infrastructure, reliable operation, long service life; Need not often change cardan shaft, device therefor is few, and the drilling and repairing well duration is short, has remarkable economic efficiency.

Description of drawings

Fig. 1 is that master of the present invention looks erection drawing.

Fig. 2 is a side-looking erection drawing of the present invention.

Fig. 3 is the shape figure of part 1 among Fig. 1,2.

Fig. 4 is the shape figure of part 2 among Fig. 1,2.

Fig. 5 is the shape figure of part 4 among Fig. 1,2.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described.

Embodiments of the invention are as shown in the figure, comprise V shape driving component 1, cross joint 2, following V shape driving component 4, coupling shaft 5, and last V shape driving component 1 bottom has East and West direction equal-width groove 6; Following V shape driving component 4 tops have north-south equal-width groove 13, and East and West direction equal-width groove 6, north-south equal-width groove 13 two sides are the plane, on the cross joint 2 convex platform 9, lower convex platform 10 are arranged; Convex platform 9, lower convex platform 10 are in the two ends up and down of cross joint 2; Convex platform 9, lower convex platform 10 parallactic angles differ 90 °, and convex platform 9, lower convex platform 10 bi-side are the plane, and convex platform 9 inserts 6 li of East and West direction equal-width grooves; 13 li of lower convex platform 10 insertion north-south equal-width grooves; Last V shape driving component 1, cross joint 2, V shape driving component 4 is pegged graft into a cross joint down, and following V shape driving component 4 bottoms on the cross joint are connected with coupling shaft 5 tops, and coupling shaft 5 bottoms connect a cross again and save.

Further scheme of the present invention is that the bottom surface of going up the East and West direction equal-width groove of opening V shape driving component 1 bottom 6 is following spill arc face 7; The end face of the convex platform 9 on the cross joint 2 is a convex-shaped arc face 8; The radius of following spill arc face 7 equates with the radius of convex-shaped arc face 8; Following spill arc face 7 contacts with convex-shaped arc face 8, and the bottom surface of the north-south equal-width groove 13 that open on following V shape driving component 4 tops is last spill arc face 12, and the end face of the lower convex platform 10 on the cross joint 2 is following convex arc face 11; The radius of last spill arc face 12 equates that with the radius of following convex arc face 11 last spill arc face 12 contacts with following convex arc face 11.

A step scheme more of the present invention is the outer closed hood 3 that coats of cross joint, closes cover 3 upper ends and sticks in the circular groove of V shape driving component 1, and closed hood 3 lower ends stick into down in the circular groove of V shape driving component 4.Outside foreign material can not get into, and in the cross joint lubricant oil are arranged all the time, and lubricity is good, and the motive position light abrasion is difficult for being worn.

Following V shape driving component bottom on the cross joint is connected with coupling shaft top and is connected the connection that a cross saves again with the coupling shaft bottom can be to be threaded, and also can be to weld.

Claims

1. a double polarizing keys cross saves cardan shaft; Comprise V shape driving component (1), cross joint (2), following V shape driving component (4), coupling shaft (5), it is characterized in that: go up V shape driving component (1) bottom and have East and West direction equal-width groove (6), following V shape driving component (4) top has north-south equal-width groove (13); East and West direction equal-width groove (6), north-south equal-width groove (13) two side are the plane; On the cross joint (2) convex platform (9), lower convex platform (10) are arranged, convex platform (9), lower convex platform (10) are in the two ends up and down of cross joint (2), and convex platform (9), lower convex platform (10) parallactic angle differ 90 °; Convex platform (9), lower convex platform (10) bi-side are the plane; Convex platform (9) inserts East and West direction equal-width groove (6) lining, and lower convex platform (10) inserts north-south equal-width groove (13) lining, and last V shape driving component (1), cross joint (2), following V shape driving component (4) are pegged graft into a cross joint; Following V shape driving component (4) bottom on the cross joint is connected with coupling shaft (5) top, and coupling shaft (5) bottom connects a cross joint again.

2. double polarizing keys cross joint cardan shaft according to claim 1; It is characterized in that: East and West direction equal-width groove (6) bottom surface that open last V shape driving component (1) bottom is following spill arc face (7); The end face of the convex platform (9) on the cross joint (2) is a convex-shaped arc face (8); The radius of following spill arc face (7) equates with the radius of convex-shaped arc face (8); Following spill arc face (7) contacts with convex-shaped arc face (8), and north-south equal-width groove (13) bottom surface that open on following V shape driving component (4) top is a last spill arc face (12), and the end face of the lower convex platform (10) on the cross joint (2) is following convex arc face (11); The radius of last spill arc face (12) equates that with the radius of following convex arc face (11) last spill arc face (12) contacts with following convex arc face (11).

3. double polarizing keys cross joint cardan shaft according to claim 1 is characterized in that: the outer closed hood (3) that coats of cross joint.

4. double polarizing keys cross joint cardan shaft according to claim 3, it is characterized in that: closed hood (3) upper end sticks in the circular groove of V shape driving component (1), and closed hood (3) lower end sticks into down in the circular groove of V shape driving component (4).