阅读说明：本技术 万向节 (Universal joint ) 是由 黄衍福 史宏江 李显义 王志国 张勇 于 2020-05-07 设计创作，主要内容包括：本发明提供了一种万向节,万向节包括：第一传动件,具有相对设置的第一传动端和第一连接端,第一传动端具有密封腔室,第一连接端用于与传动轴连接；第二传动件,具有相对设置的第二传动端和第二连接端,第二传动端位于密封腔室内,第二连接端用于与另一传动轴连接；传扭结构,设置在密封腔室内,且位于第一传动端和第二传动端之间,传扭结构包括至少一个传扭单元,传扭单元为柱形结构。通过本申请提供的技术方案,能够解决现有技术中的万向节应用在石油钻井领域存在的密封传扭问题。(The present invention provides a universal joint, comprising: the first transmission piece is provided with a first transmission end and a first connecting end which are oppositely arranged, the first transmission end is provided with a sealing cavity, and the first connecting end is used for being connected with the transmission shaft; the second transmission piece is provided with a second transmission end and a second connecting end which are oppositely arranged, the second transmission end is positioned in the sealed cavity, and the second connecting end is used for being connected with the other transmission shaft; the transmission structure is arranged in the sealed cavity and located between the first transmission end and the second transmission end, the transmission structure comprises at least one transmission unit, and the transmission unit is of a cylindrical structure. Through the technical scheme that this application provided, can solve the universal joint among the prior art and use the sealed biography of existence in the oil drilling field and turn round the problem.)

1. A universal joint, comprising:

the first transmission piece (10) is provided with a first transmission end (11) and a first connection end (12) which are arranged oppositely, the first transmission end (11) is provided with a sealing cavity, and the first connection end (12) is used for being connected with a transmission shaft;

the second transmission piece (20) is provided with a second transmission end (21) and a second connecting end (22) which are arranged oppositely, the second transmission end (21) is positioned in the sealed cavity, and the second connecting end (22) is used for being connected with another transmission shaft;

the transmission structure is arranged in the sealed cavity and located between the first transmission end (11) and the second transmission end (21), the transmission structure comprises at least one transmission unit (31), and the transmission unit (31) is of a cylindrical structure.

2. The joint according to claim 1, wherein the torque transmission structure further comprises a torque transmission groove (32), the torque transmission unit (31) is correspondingly located in the torque transmission groove (32), the torque transmission unit (31) is arranged on one of the first transmission end (11) and the second transmission end (21), the torque transmission groove (32) is arranged on the other of the first transmission end (11) and the second transmission end (21), and the torque transmission unit (31) is matched with the torque transmission groove (32) to transmit torque.

3. A joint according to claim 1, wherein the second transmission end (21) is of spherical configuration, the sealed chamber being adapted to the configuration of the second transmission end (21).

4. A joint according to claim 1, wherein the sealed chamber comprises a connecting section (13) and a sealing section (14) which are in communication with each other in the axial direction of the first transmission member (10), the sealing section (14) being arranged adjacent to the first connecting end (12), the second transmission end (21) being arranged within the sealing section (14), the joint further comprising:

the end cover (40) is sleeved on the second transmission piece (20), the end cover (40) is connected with the connecting section (13), and the end cover (40) is used for plugging the sealing section (14) to form the sealing cavity.

5. The gimbal according to claim 4, further comprising:

the sealing element (50) is sleeved on the second transmission piece (20) and is positioned at one end, far away from the first transmission piece (10), of the end cover (40);

a filler (60) disposed within a cavity formed by the seal (50), the second transmission piece (20), and the end cap (40).

6. A joint according to claim 4, wherein the end cap (40) has a through hole (41), the inner wall of the through hole (41) near the end of the first transmission member (10) is an arc-shaped structure, the arc-shaped structure is attached to the outer wall of the second transmission member (21), and the diameter of the other end of the through hole (41) is gradually increased towards the direction far away from the first transmission member (10).

7. The gimbal according to claim 1,

the torque transmission unit (31) and the first transmission piece (10) or the second transmission piece (20) are of an integrally formed structure; or the like, or, alternatively,

a first groove is formed in the sealed cavity, a second groove is formed in the side wall of the second transmission end, the first groove and the second groove are matched with each other to form a containing cavity, and the containing cavity is used for placing the torque transmission unit (31).

8. A joint according to claim 1, wherein the torque transmission structure comprises a plurality of said torque transmission units (31), said plurality of said torque transmission units (31) being arranged at intervals in the circumferential direction of the second transmission end (21).

9. The gimbal according to claim 1, wherein the cylindrical structure is one of cylindrical, ellipsoidal, and kidney-shaped in longitudinal cross-section.

10. A joint according to claim 1, wherein the first transmission member (10) is provided with an oil filler hole (70), the oil filler hole (70) communicating with the sealed chamber, and the oil filler hole (70) is provided with a plug.

Technical Field

The invention relates to the technical field of universal joints, in particular to a universal joint.

Background

At present, the universal joint of a screw drill in the field of oil drilling is mostly a spherical universal joint, the spherical universal joint depends on a steel ball to transfer torque, but the contact area of the spherical universal joint is small and the spherical universal joint is in line contact, and when local load is too large, the steel ball is deformed or crushed and damaged. The existing cross universal joint can bear heavy load, but the torque transmission structure of the existing cross universal joint is exposed outside and cannot be used in a mud environment or an environment with more impurities. Therefore, the existing universal joint cannot meet the torque transmission requirement of oil drilling.

Disclosure of Invention

The invention provides a universal joint, which aims to solve the problem that the universal joint in the prior art cannot meet the torque transmission requirement of petroleum drilling.

The present invention provides a universal joint, comprising: the first transmission piece is provided with a first transmission end and a first connecting end which are oppositely arranged, the first transmission end is provided with a sealing cavity, and the first connecting end is used for being connected with the transmission shaft; the second transmission piece is provided with a second transmission end and a second connecting end which are oppositely arranged, the second transmission end is positioned in the sealed cavity, and the second connecting end is used for being connected with the other transmission shaft; the transmission structure is arranged in the sealed cavity and located between the first transmission end and the second transmission end, the transmission structure comprises at least one transmission unit, and the transmission unit is of a cylindrical structure.

Furthermore, the torque transmission structure further comprises a torque transmission groove, the torque transmission unit is correspondingly located in the torque transmission groove, the torque transmission unit is arranged on one of the first transmission end and the second transmission end, the torque transmission groove is arranged on the other one of the first transmission end and the second transmission end, and the torque transmission unit is matched with the torque transmission groove to transmit torque.

Further, the second transmission end is of a spherical structure, and the sealing cavity is matched with the structure of the second transmission end.

Further, sealed cavity includes the linkage segment and the seal segment that communicate each other along the axis direction of first transmission piece, and the seal segment is close to first link setting, and the setting of second transmission end is in the seal segment, and the universal joint still includes: and the end cover is sleeved on the second transmission piece and is connected with the connecting section, and the end cover is used for plugging the sealing section to form a sealing cavity.

Further, the universal joint further comprises: the sealing element is sleeved on the second transmission element and is positioned at one end of the end cover far away from the first transmission element; and the filling piece is arranged in a cavity formed by the sealing piece, the second transmission piece and the end cover.

Further, the end cover has the through-hole, and the inner wall that is close to the one end of first transmission piece of through-hole is the arc structure, and the outer wall of arc structure and second transmission end is laminated mutually, and the diameter of the other end of through-hole is crescent towards the direction of keeping away from first transmission piece.

Furthermore, the torque transmission unit and the first transmission piece or the second transmission piece are of an integrally formed structure; or, be provided with first recess in the sealed cavity, the lateral wall of second transmission end is provided with the second recess, and first recess and second recess mutually support in order to form and hold the chamber, hold the chamber and be used for placing the biography and turn round the unit.

Further, the torque transmission structure comprises a plurality of torque transmission units which are arranged at intervals along the circumferential direction of the second transmission end.

Further, the columnar structure is one of a cylindrical structure, an ellipsoidal structure, and a structure having a kidney-shaped longitudinal section.

Furthermore, an oil filling hole is formed in the first transmission piece and communicated with the sealing cavity, and a screw plug is arranged on the oil filling hole.

By applying the technical scheme of the invention, the universal joint comprises the first transmission piece, the second transmission piece and the torque transmission structure, wherein the first transmission piece is provided with the sealing cavity, the torque transmission structure can be wrapped in the sealing cavity to prevent foreign matters from entering the sealing cavity, and the torque transmission unit is arranged to be of a cylindrical structure, so that the contact area of the torque transmission structure in the process of transmitting torque can be increased, and the torque transmission structure can be suitable for torque transmission of larger load. Consequently, the structure that provides through this application can satisfy the load requirement, can provide sealed cavity again in order to avoid impurity and the structure contact of biography torsion, has prolonged the life of device, has satisfied the biography of oil drilling and has turned round the requirement.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic structural diagram of a gimbal provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural view of the first transmission member of FIG. 1;

FIG. 3 shows a schematic illustration of the construction of the second transmission element from FIG. 1;

FIG. 4 shows a cross-sectional view at A-A in FIG. 3;

FIG. 5 shows a schematic structural view of the end cap of FIG. 1;

fig. 6 shows a schematic view of a cylindrical torque transmission unit;

fig. 7 shows a schematic view of a torque transfer unit in the shape of an ellipsoid;

fig. 8 shows a schematic view of a longitudinal section of the torque transmission unit in a kidney-shaped configuration.

Wherein the figures include the following reference numerals:

10. a first transmission member; 11. a first transmission end; 12. a first connection end; 13. a connecting section; 14. a sealing section;

20. a second transmission member; 21. a second transmission end; 22. a second connection end;

31. a torque transmission unit; 32. a torque transmission groove;

40. an end cap; 41. a through hole; 50. a seal member; 60. a filling member; 70. and an oil filling hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present application provides a gimbal including: a first transmission member 10, a second transmission member 20 and a torque transmission structure. The first transmission member 10 has a first transmission end 11 and a first connection end 12, which are oppositely disposed, the first transmission end 11 has a sealed chamber, and the first connection end 12 is used for connecting with a transmission shaft. The second transmission element 20 has a second transmission end 21 and a second connection end 22, which are oppositely arranged, the second transmission end 21 is located in the sealed chamber, and the second connection end 22 is used for connecting with another transmission shaft. The torque transmission structure is arranged in the sealed cavity and located between the first transmission end 11 and the second transmission end 21, the torque transmission structure comprises at least one torque transmission unit 31, and the torque transmission unit 31 is of a cylindrical structure. Through will transfering the structure setting in sealed cavity, can prevent that impurity from getting into sealed cavity in, and then can avoid impurity to transmit and turn round the structure and wear and tear, guarantee to transmit and turn round the normal operating of structure. The torque transmission unit 31 is provided in a cylindrical structure, so that the torque transmission area can be increased to increase the torque transmission load.

The utility model provides a universal joint compact structure compares with the universal energy-conserving great moment of torsion of the universal energy-conserving transmission of external diameter cross, and can avoid impurity to get into the cavity through sealed cavity, guarantees to pass and turns round the normal operating of structure. The universal joint of this application is different with ball formula universal joint structure, and this application universal joint is through cylindricality structure transmission moment of torsion, and the biography is turned round area of contact big, for face contact form, area of contact is greater than the area of contact of turning round the steel ball with the diameter biography, can not cause the face of turning round conquassation deformation when the great moment of torsion of transmission. The cylindrical structure increases the torque transmission load due to large contact area and small local abrasion, has higher wear resistance and prolongs the service life of the universal joint.

Specifically, the torque transmission structure further comprises a torque transmission groove 32, and the torque transmission unit 31 is correspondingly positioned in the torque transmission groove 32. The torque transmission unit 31 is engaged with the torque transmission groove 32 to relatively fix the first transmission member 10 and the second transmission member 20, and the first transmission member 10 and the second transmission member 20 transmit torque through the above structure. Wherein the torque transmission unit 31 is provided at one of the first and second transmission ends 11, 21 and the torque transmission groove 32 is provided at the other of the first and second transmission ends 11, 21. In this embodiment, the torque transfer unit 31 is disposed on the second drive end 21, and the torque transfer unit 31 is disposed within the sealed chamber of the first drive end 11.

As shown in fig. 2 and 3, the second transmission end 21 is a spherical structure, and the sealing chamber is adapted to the structure of the second transmission end 21, that is, the sealing chamber is a spherical chamber adapted to the second transmission end 21. The structure is beneficial to the centering swing of the second transmission end 21 in the sealed cavity, so that universal connection is realized; and, cooperate through spherical cavity and spherical structure, can firmly embrace second transmission end 21, can bear great pressure and certain pulling force like this, be particularly suitable for the transmission operating mode that has pressure between two axles.

As shown in fig. 2 and 5, the sealed chamber includes a connecting section 13 and a sealing section 14 that are communicated with each other along the axial direction of the first transmission member 10, the sealing section 14 is disposed near the first connecting end 12, the second transmission end 21 is disposed in the sealing section 14, the universal joint further includes an end cap 40, the end cap 40 is sleeved on the second transmission member 20, the end cap 40 is connected with the connecting section 13, and the end cap 40 is used for plugging the sealing section 14 to form the sealed chamber. Specifically, the circular structure in fig. 2 is the sealing section 14 with a spherical structure, the connecting section 13 is located at the front end of the sealing section 14, and the connecting section 13 is connected with the end cover 40, so that the sealing section 14 can be sealed by the end cover 40, and the second transmission end 21 is completely wrapped between the end cover 40 and the sealing section 14. To facilitate connection, the connecting section 13 and the end cap 40 may be connected by threads.

As shown in fig. 1, the universal joint further includes: a seal 50 and a filler 60. The sealing element 50 is sleeved on the second transmission member 20 and is located at an end of the end cover 40 far away from the first transmission member 10. A filler element 60 is disposed within the cavity formed by seal element 50, second transmission member 20 and end cap 40. By providing the sealing member 50 and the packing member 60, the sealing performance of the apparatus can be further improved, and entry of foreign matter into the seal chamber can be prevented. Wherein the sealing member 50 may be made of a rubber material.

As shown in fig. 5, the end cap 40 has a through hole 41, an inner wall of the through hole 41 near one end of the first transmission member 10 is an arc-shaped structure, the arc-shaped structure is attached to an outer wall of the second transmission end 21, and a diameter of the other end of the through hole 41 gradually increases toward a direction away from the first transmission member 10. Wherein, the right side of end cover 40 is used for with the outer wall butt of second drive end 21, and what the circular dotted line on the right side in fig. 5 indicates is the position of second drive end 21 on end cover 40, through setting up the right-hand member of end cover 40 to arc structure, can be better with the butt of second drive end 21 like this, makes second drive end 21 fix steadily in sealed chamber. The left end of the end cover 40 is arranged to be of a horn mouth structure, so that the relative position of the second transmission piece 20 and the end cover 40 can be conveniently adjusted, the second transmission piece 20 is more flexible in setting, and the space requirement required by swinging is met.

The torque transmission unit 31 and the first transmission member 10 or the second transmission member 20 may be integrally formed or may be separated. As shown in fig. 3 and 4, in the present embodiment, the torque transmission unit 31 is a split structure, and a first groove is provided in the sealed chamber, a second groove is provided on the sidewall of the second transmission end 21, the first groove and the second groove are mutually matched to form an accommodating cavity, and the accommodating cavity is used for placing the torque transmission unit 31.

The torque transmission units 31 of the universal joint can be designed into 1 column, 2 columns, 3 columns, 4 columns, 5 columns, 6 columns, 7 columns, 8 columns, 9 columns, 10 columns, 12 columns and the like, and different numbers of the torque transmission units 31 can be selected according to the size space and the torque transmission load. In the present embodiment, the torque transmission structure includes a plurality of torque transmission units 31, and the plurality of torque transmission units 31 are arranged at intervals along the circumferential direction of the second transmission end 21.

Wherein, the first transmission piece 10 is provided with an oil filling hole 70, the oil filling hole 70 is communicated with the sealed cavity, and the oil filling hole 70 is provided with a plug. Lubricating grease is injected into the sealed cavity through the oil injection hole 70, so that the torque transmission matching surface of the universal joint is completely in a lubricating environment, the abrasion can be reduced, and the cooling effect can be achieved. When the universal joint is maintained, new lubricating grease can be directly injected from the oil injection hole without disassembling, and old lubricating grease is removed. The oil filler point is furnished with the plug, can ensure like this that the lubricating grease in the sealed cavity keeps apart with external medium, avoids the inside lubricating grease of sealed cavity to receive the pollution, and it is long when extension universal joint maintenance interval.

Different cylindrical structures can be designed according to the angle range of the universal joint, as shown in fig. 6 to 8, the cylindrical structure is one of a cylinder, an ellipsoid and a kidney-shaped structure with a longitudinal section. The longitudinal section is of a waist-shaped structure, the middle part of the longitudinal section is cylindrical, and two cylindrical end surfaces of the longitudinal section are of convex cambered surfaces.

Through the universal joint that this application provided, can enough satisfy big moment of torsion heavy load operation, also can avoid impurity to get into in the biography turns round structure simultaneously. And the device has simple structure and small occupied volume, and is suitable for being used in narrow and small occasions.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.