CN-116877611-B - Spiral stepless rotary locking mechanism

CN116877611BCN 116877611 BCN116877611 BCN 116877611BCN-116877611-B

Abstract

The invention relates to a spiral stepless rotating locking mechanism which comprises a spiral nut, a screw assembly and a locking device, wherein the spiral nut can rotate around an axis of the spiral nut, the screw assembly is arranged at one end of the spiral nut and is coaxially distributed with the spiral nut, one end of the screw assembly is in threaded connection with the spiral nut, and the locking device is arranged at the other end of the screw assembly and is used for locking or unlocking the screw assembly. The stepless rotary locking mechanism has the advantages of simple structure, reliable operation and small locking force, is used for stepless locking of the rotary part, has small locking driving force, and can realize stepless locking of the rotary part.

Inventors

LIU KE
GUO XIUQIN
LI YANG
JIANG WEN
CHEN XINXIN
ZHANG JIZHE
LUO XUELI
MA YING
GAO YONGLIANG
WU SIJIA

Assignees

中国石油天然气集团有限公司
北京康布尔石油技术发展有限公司
中国石油集团工程技术研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20230515

Claims (8)

1. The spiral stepless rotary locking mechanism is characterized by comprising a spiral nut (1), a screw assembly and a locking device, wherein the spiral nut (1) can rotate around an axis of the spiral nut (1), the screw assembly is arranged at one end of the spiral nut (1), is coaxially distributed with the spiral nut (1) and is in threaded connection with the spiral nut (1) at one end, and the locking device is arranged at the other end of the screw assembly and is used for locking or unlocking the screw assembly; The screw assembly comprises a screw (2) and a locking push rod (3), wherein the screw (2) and the screw nut (1) are coaxially distributed, one end of the screw is in threaded connection with the screw nut (1), the locking push rod (3) and the screw (2) are coaxially distributed, one end of the locking push rod is fixedly connected with the other end of the screw (2), and the locking device is arranged at the other end of the locking push rod (3) and is used for locking or unlocking the locking push rod (3); The locking device comprises a supporting plate (4), a locking block (5) and a driving piece (6), wherein the supporting plate (4) is fixedly arranged and is positioned at the other end of the locking push rod (3) and extends along the axial direction perpendicular to the locking push rod (3), the locking block (5) is arranged on the supporting plate (4) and can slide along the radial direction of the locking push rod (3), and the driving piece (6) is fixedly arranged on the supporting plate (4), and the driving end of the driving piece is fixedly connected with the locking block (5) and is used for driving the locking block (5) to slide to lock or release the locking push rod (3).
2. The screw-type stepless rotary locking mechanism according to claim 1, wherein the screw nut (1) is provided with an internal thread, and one end of the screw rod (2) is provided with an external thread which extends into the screw nut (1) and is in threaded connection with the screw nut (1).
3. The spiral stepless rotary locking mechanism as claimed in claim 1, wherein one end of the locking block (5) and the other end of the locking push rod (3) are respectively inclined and can be mutually slidably attached.
4. The spiral stepless rotary locking mechanism of claim 1, wherein a radial positioning block (7) is fixedly arranged on the supporting plate (4), and the radial positioning block (7) is in sliding fit with the locking push rod (3).
5. The stepless rotary locking mechanism of any one of claims 1 to 4, wherein the screw assembly further comprises a fixing plate (8), the fixing plate (8) is fixedly arranged and extends along the axial direction perpendicular to the screw (2), an elastic piece is further arranged on the fixing plate, two ends of the elastic piece are respectively abutted against the fixing plate (8) and the other end of the screw (2), and the locking push rod (3) penetrates through the fixing plate (8).
6. The spiral stepless rotary locking mechanism of claim 5, wherein a spring seat (9) is fixedly arranged on one side, close to the spiral screw (2), of the fixing plate (8), a groove is formed in the spring seat (9), the spiral screw (2) is of a structure with one end being thin and the other end being thick, the inside of the spiral screw is hollow, two ends of the spiral screw are open, one end of the locking push rod (3) extends from the thick end of the spiral screw (2) to the inside of the spiral screw and is fixedly connected with the thick end of the spiral screw, the elastic piece comprises a spring (10), the spring (10) is sleeved on the locking push rod (3), and two ends of the spring are respectively extended into the thick end of the spiral screw (2) and the groove and are in butt joint.
7. The stepless rotary locking mechanism of claim 6, wherein one end of the locking push rod (3) is provided with an annular step, one end of the locking push rod (3) extends into the thin end of the screw rod (2) and is fixedly connected, and the step surface of the annular step is abutted with the bottom wall of the thick end of the screw rod (2).
8. The progressive addition mechanism of claim 6, wherein the upset of the helical screw (2) extends into the recess.

Description

Spiral stepless rotary locking mechanism Technical Field The invention relates to the technical field of intelligent mechanical arm locking equipment for petroleum drilling, in particular to a spiral stepless rotary locking mechanism. Background The intelligent transfer manipulator is used for locking the grabbing and clamping functions of the intelligent transfer manipulator in any working state in the working process, and the aim of locking the manipulator is achieved by locking a rotating part in a transmission chain of the intelligent transfer manipulator. Conventionally, locking of a rotating member is generally achieved by a ratchet mechanism, a belt brake, a disc brake, a friction clutch, or the like. The ratchet mechanism is step-by-step locking, so that stepless locking of any working state of the intelligent transfer manipulator cannot be met, and the belt brake, the disc brake device and the friction clutch device can realize stepless locking, but the required locking force is very large, and the intelligent transfer manipulator is difficult to realize due to space and power limitation. It is therefore necessary to design a mechanism that is simple in structure, reliable in operation, small in locking force, and capable of performing stepless locking of the rotating member. Disclosure of Invention The invention aims to solve the technical problem of the prior art by providing a spiral stepless rotating locking mechanism. The technical scheme for solving the technical problems is as follows: the screw stepless rotating locking mechanism comprises a screw nut, a screw assembly and a locking device, wherein the screw nut can rotate around the axis of the screw nut, the screw assembly is arranged at one end of the screw nut, the screw assembly and the screw nut are coaxially distributed, one end of the screw assembly is in threaded connection with the screw nut, and the locking device is arranged at the other end of the screw assembly and is used for locking or unlocking the screw assembly. The screw assembly locking device has the beneficial effects that when the screw assembly locking device is used, the screw nut in threaded connection with the screw assembly is locked, so that the rotating piece fixedly connected with the screw nut is locked, the stepless locking of the rotating piece is realized, and the locking is convenient. The invention provides a stepless rotary locking mechanism with simple structure, reliable operation and small locking force, which is used for stepless locking of a rotary part, has small locking driving force and can realize stepless locking of the rotary part. On the basis of the technical scheme, the invention can be improved as follows. The screw assembly further comprises a screw rod and a locking push rod, wherein the screw rod is coaxially distributed with the screw nut, one end of the screw rod is in threaded connection with the screw nut, the locking push rod is coaxially distributed with the screw rod, one end of the locking push rod is fixedly connected with the other end of the screw rod, and the locking device is arranged at the other end of the locking push rod and used for locking or unlocking the locking push rod. The technical scheme has the advantages that when the novel locking device is used, the locking device is used for locking the locking push rod, so that the spiral screw fixedly connected with the locking push rod is locked, the spiral nut in threaded connection with the spiral screw is further locked, the rotating piece fixedly connected with the spiral nut is locked, stepless locking of the rotating piece is achieved, and locking is convenient. Further, an internal thread is arranged on the screw nut, an external thread is arranged at one end of the screw rod, and the external thread extends into the screw nut and is in threaded connection with the screw nut. The beneficial effect of adopting above-mentioned further scheme is simple structure, reasonable in design, and screw rod's one end passes through threaded connection with screw nut, easy dismounting. The locking device comprises a locking push rod, a supporting plate, a locking block and a driving piece, wherein the locking block is arranged on the supporting plate in a fixed mode, the locking block is positioned at the other end of the locking push rod and extends along the axial direction perpendicular to the locking push rod, the locking block is arranged on the supporting plate and can slide along the radial direction of the locking push rod, and the driving piece is fixedly arranged on the supporting plate, and the driving end of the driving piece is fixedly connected with the locking block and used for driving the locking block to slide to lock or unlock the locking push rod. The beneficial effect of adopting above-mentioned further scheme is when using, slides to locking or unclamp the locking push rod through driving piece drive locking piece in order to lock the locking push rod