CN200943650Y

CN200943650Y - Petal type cardan axle

Info

Publication number: CN200943650Y
Application number: CN 200620084055
Authority: CN
Inventors: 王洪渤; 林强; 孙扬志; 周继胜; 高志松
Original assignee: 王洪渤
Priority date: 2006-04-29
Filing date: 2006-04-29
Publication date: 2007-09-05
Anticipated expiration: 2016-04-29

Abstract

The utility model discloses a petal-type cardan shaft, which comprises a middle part whose two ends are respectively connected with a petal-type universal joint, and this universal joint comprises a first petal-type body and a second petal-type body which engages with each other. A universal torque transmission device comprising a flexible bar is provided inside the internal chamber of the first and second petal-type body. A plurality of hinging devices is respectively provided between the first end and the first petal-type body as well as between the second end and the second petal-type body. The petal-type cardan shaft can effectively promotes service life of the cardan shaft and also prevent the first petal-type body from breaking off from the second petal-type body, thus the utility model prevents accidents and is extensively applicable for screwdrill.

Description

The petal type cardan shaft

Technical field

The utility model relates to a kind of petal type cardan shaft, relates in particular to a kind of petal type cardan shaft that is used for helicoid hydraulic motor.

Background technique

In explorations such as oil, geology, helicoid hydraulic motor is used to bore directional well or horizontal well.Wherein stearable assemly should be finished positioning operation, finishes hold angle again, entangles operation such as orientation, and moment of torsion and rotating speed that screw drilling tool motor produces transmit by cardan shaft.The universal joint of cardan shaft commonly used is that hollow steel pipe is radially cut into two intermeshing petal bodies, has the slit between the adjacent petal tooth, this slit is the space of the universal rotation of universal joint, the width of the tooth top of each petal tooth is greater than the width of its tooth root, the petal odontotripsis not too under the serious situation, can axially not throw off by two petal bodies.Owing to structural reason, the petal tooth carries out Wear-resistant Treatment by whole carburizing, wearing and tearing along with the petal tooth, the gap of its adjacent petal tooth increases gradually, thereby reduce the transmission capacity and the working life of cardan shaft greatly, moreover, when the petal odontotripsis arrives certain degree, two petal bodies will axially be thrown off, and influence the bulk life time of helicoid hydraulic motor.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of petal type cardan shaft is provided, and it can effectively improve the working life of cardan shaft by simple structure.

For solving the problems of the technologies described above, the technical solution of the utility model is: the petal type cardan shaft, comprise intermediate, the two ends of described intermediate connect a petal type universal joint respectively, described universal joint comprises the intermeshing first petal body and the second petal body, in the inner chamber of the described first petal body and the second petal body a universal torque transmitter is installed.

As a kind of embodiment, described universal torque transmitter comprises that is scratched a bar, is respectively equipped with several articulated mountings between described first end of scratching bar and the first petal body and between described second end of scratching bar and the second petal body.

As another kind of embodiment, described each articulated mounting comprises a spherical parts, a fixing device that is fixedly connected on the described first petal body or the second petal body, the end of described fixing device is provided with hemisphere first pit, described outer circumferential face of scratching bar is provided with hemisphere second pit, and described spherical parts is held in first pit and the formed spherical hollow space of second pit.

After having adopted technique scheme, owing in the inner chamber of the described first petal body and the second petal body a universal torque transmitter is installed, described universal torque transmitter comprises that is scratched a bar, be respectively equipped with several articulated mountings between described first end of scratching bar and the first petal body and between described second end of scratching bar and the second petal body, so, moment of torsion transmission between the first petal body and the second petal body not only can be undertaken by intermeshing petal tooth, and can pass through universal torque transmitter transmitting torque.Under the normal condition, the moment of torsion transmission between the first petal body and the second petal body mainly is to be undertaken by intermeshing petal tooth, and this universal torque transmitter only plays the auxiliary transmission effect.In case the petal odontotripsis is to a certain degree, this universal torque transmitter and intermeshing petal tooth be common transmitting torque, and to the later stage, will mainly pass through universal torque transmitter transmitting torque.Evidence is compared with traditional petal type cardan shaft, and can improve 30%～50% its working life.

Because each articulated mounting comprises a spherical parts, a fixing device that is fixedly connected on the described first petal body or the second petal body, the end of described fixing device is provided with hemisphere first pit, described outer circumferential face of scratching bar is provided with hemisphere second pit, described spherical parts is held in first pit and the formed spherical hollow space of second pit, so, universal torque transmitter is in transmitting torque, can also limit the first petal body and the second petal axon to disengagement, prevent the generation of accident.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model embodiment's a outline drawing;

Fig. 2 is a longitudinal sectional view embodiment illustrated in fig. 1.

Embodiment

A kind of petal type cardan shaft, shown in Fig. 1 and Fig. 2 are common, comprise intermediate 1, the two ends of the described intermediate 1 petal type universal joint 2 that is threaded respectively, described universal joint 2 comprises the intermeshing first petal body 21 and the second petal body 22, in the inner chamber of the described first petal body 21 and the second petal body 22 a universal torque transmitter is installed.

Described universal torque transmitter comprises that is scratched a bar 31, is respectively equipped with several articulated mountings between described first end of scratching bar 31 and the first petal body 21 and between described second end of scratching bar 31 and the second petal body 22.

Described each articulated mounting comprises a spherical parts 32, a fixing device 33 that radially is threadedly connected to the described first petal body 21 or the second petal body 22, the end of described fixing device 33 is provided with hemisphere first pit, described outer circumferential face of scratching bar 31 is provided with hemisphere second pit, and described spherical parts 32 is held in first pit and the formed spherical hollow space of second pit.

Claims

1, petal type cardan shaft, comprise intermediate (1), the two ends of described intermediate (1) connect a petal type universal joint (2) respectively, described universal joint (2) comprises the intermeshing first petal body (21) and the second petal body (22), it is characterized in that: in the inner chamber of the described first petal body (21) and the second petal body (22) a universal torque transmitter is installed.

2, petal type cardan shaft as claimed in claim 1, it is characterized in that: described universal torque transmitter comprises that is scratched a bar (31), is respectively equipped with several articulated mountings between described first end of scratching bar (31) and the first petal body (21) and between described second end of scratching bar (31) and the second petal body (22).

3, petal type cardan shaft as claimed in claim 2, it is characterized in that: described each articulated mounting comprises a spherical parts (32), a fixing device (33) that is fixedly connected on the described first petal body (21) or the second petal body (22), the end of described fixing device (33) is provided with hemisphere first pit, described outer circumferential face of scratching bar (31) is provided with hemisphere second pit, and described spherical parts (32) is held in first pit and the formed spherical hollow space of second pit.

4, petal type cardan shaft as claimed in claim 3 is characterized in that: described fixing device (33) radially is threaded with the first petal body (21) or the second petal body (22).