CN114440021A - Anti-loosening mechanism of direction-adjustable joint - Google Patents

Anti-loosening mechanism of direction-adjustable joint Download PDF

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Publication number
CN114440021A
CN114440021A CN202011225902.7A CN202011225902A CN114440021A CN 114440021 A CN114440021 A CN 114440021A CN 202011225902 A CN202011225902 A CN 202011225902A CN 114440021 A CN114440021 A CN 114440021A
Authority
CN
China
Prior art keywords
locknut
joint
loosening
thread
shaped pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011225902.7A
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Chinese (zh)
Inventor
王述益
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Kaiheng Guangyue Machinery Manufacturing Co ltd
Original Assignee
Shanghai Kaiheng Guangyue Machinery Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Kaiheng Guangyue Machinery Manufacturing Co ltd filed Critical Shanghai Kaiheng Guangyue Machinery Manufacturing Co ltd
Priority to CN202011225902.7A priority Critical patent/CN114440021A/en
Publication of CN114440021A publication Critical patent/CN114440021A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/005—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts comprising locking means for the threaded member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
    • F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L43/00—Bends; Siphons

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

The invention discloses a locking mechanism of an adjustable direction joint, which comprises a locknut, a joint body, a locknut/locking body, a gasket, a sealing piece and a U-shaped pin, wherein the joint body is connected with an oil port, after the locknut is locked, the locknut/locking body is in threaded connection with the locknut and is fixed by the U-shaped pin, and the problem of loosening of the locknut is effectively prevented by utilizing the difference of the turning directions and/or the pitches of two sections of threads on the locknut, so that the potential safety hazard in the prior art is solved.

Description

Anti-loosening mechanism of adjustable direction joint
Technical Field
The invention relates to the technical field of hydraulic or pneumatic pipe joints, in particular to a locking mechanism of an adjustable direction joint.
Background
The adjustable direction joint has a large number of applications in hydraulic and pneumatic pipe systems, and its direction adjustable end is composed of a lock nut, a gasket and a sealing element, as shown in fig. 5. The direction-adjustable joint is convenient to install and adjust the direction of the pipeline, and compared with a mode of combining and adjusting the direction by using two joints, the direction-adjustable joint has low cost, thereby being widely welcomed.
The adjustable end of the adjustable joint adopts a mode that a locking nut is screwed to a specified torque to compress a gasket and a sealing piece so as to form sealing on an oil port, the locking nut keeps fastening by means of friction torque, the locking nut is easy to loosen under the influence of various internal and external factors such as system vibration or pressure impact in use, once the loosening begins to occur, the sealing performance of the whole system is greatly influenced, even the failure of the whole pipeline system can be possibly caused, and a serious safety result is generated.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the anti-loosening mechanism of the adjustable joint, which solves the problem that the locknut of the adjustable joint is loosened in use.
The technical scheme is as follows:
in order to solve the above problems, the present invention provides the following technical solutions:
adjustable locking mechanism to connecting including lock nut, connects the body, lock nut, gasket, sealing member and U-shaped round pin, connect and be provided with the screw thread of mutually supporting on body and the lock nut, its characterized in that:
the adjustable end of the joint body is provided with a gasket groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side, and the rear end of the external thread is provided with a rear step;
the inner thread of the locking nut is matched with the outer thread on the joint body, and the outer thread is arranged on one side of the locking nut;
one end of the locknut is an internal thread, the internal thread is matched with the external thread of the locknut, the other end of the locknut is a stepped hole, two side through holes which are parallel to each other are arranged on one side of the stepped hole of the locknut, and the center lines of the two side holes are parallel to the end surface of the locknut and symmetrically distributed along the axis of the locknut;
the gasket is matched with the gasket groove on the joint body;
the cross section width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the joint body, and the U-shaped pin is matched with a side through hole on the locknut. .
Preferably, the internal thread of the locking nut is opposite in direction and/or different in pitch from the external thread. When the locknut is connected with the connector body and the locknut at the same time, the mechanism can effectively prevent the locknut from loosening under the condition of limiting the axial movement of the locknut.
Preferably, the distance from the backward step of the adjustable direction end of the joint body to the U-shaped pin insertion groove is slightly smaller than the distance from the end surface of the non-thread end of the locknut to the side through hole. When the non-threaded end of the locknut is tightly attached to the backward step of the adjustable end of the connector body, the U-shaped pin penetrates through one side of the two side holes on the locknut and penetrates out from the other side of the locknut through the U-shaped pin insertion groove on the connector body, interference fit can be formed, the locknut can only rotate and cannot axially shift along the adjustable end of the connector body, and the locknut is prevented from being loosened by limiting the axial shift of the locknut.
Preferably, the U-shaped pin is made of a material with certain elasticity and hardness, and the opening size of the opening end is larger than that of the opening at the middle part. Therefore, the U-shaped pin can not fall off after passing through the two side through holes of the locknut and the U-shaped pin insertion groove on the connector body.
The technical scheme includes that firstly, the locknut and the locknut are screwed together to form the combined nut and then are screwed into the direction-adjustable end of the connector body, then the gasket and the sealing element are installed, the whole connector is screwed into the oil port according to the standard installation mode of the direction-adjustable connector, the direction is adjusted, and the locknut is screwed according to the specified torque to form sealing; then screwing the locknut, screwing the non-threaded end of the locknut to the rear step of the direction-adjustable end of the joint body until the two end faces are contacted, and then screwing to a certain torque; and finally, the U-shaped pin penetrates through the side hole in the locknut and the U-shaped pin insertion groove in the connector body to prevent the locknut from axially moving, so that the integral anti-loosening effect is formed.
As a variation of the above scheme, a similar anti-loose connection is obtained by changing an anti-loose nut using an internal thread into an anti-loose body using an external thread, and the anti-loose connection comprises a locknut, a joint body, an anti-loose body, a gasket, a sealing element and a U-shaped pin, wherein the joint body and the locknut are provided with mutually matched threads, and the anti-loose connection is characterized in that:
the adjustable end of the joint body in the modified example is provided with a gasket groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side, and the rear end of the external thread is provided with a rear step;
the inner hole of the locking nut of the variant is provided with two sections of internal threads, wherein the internal threads with smaller diameter are matched with the external threads on the joint body;
one side of the anti-loosening body is provided with an external thread, the external thread is matched with an internal thread with a larger diameter of the lock nut, the other side of the anti-loosening body is provided with two side through holes which are parallel to each other, the center lines of the two side holes are parallel to the end surface of the anti-loosening body and are symmetrically distributed along the axis of the anti-loosening body, and the diameter of the inner through hole of the anti-loosening body is larger than the major diameter of the thread of the joint body;
the gasket in the variant is matched with the gasket groove on the joint body;
the cross section width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the joint body, and the U-shaped pin is matched with the side hole on the anti-loosening body.
As a variant, the two internal threads of the union nut are preferably of opposite hand and/or of different pitch. When the locknut is connected with the joint body and the anti-loosening body at the same time, the mechanism can effectively prevent the locknut from loosening under the condition of limiting the axial movement of the anti-loosening body.
Preferably, the distance from the backward step of the adjustable direction end of the joint body to the U-shaped pin insertion groove is slightly smaller than the distance from the end surface of the non-thread end of the anti-loosening body to the side through hole. When the non-threaded end of the check body is tightly attached to the backward step of the adjustable end of the connector body, the U-shaped pin penetrates through one side of the two side holes on the check nut and penetrates out of the other side of the check nut through the U-shaped pin insertion groove on the connector body, interference fit can be formed, the check nut can only rotate and cannot axially shift along the adjustable end of the connector body, and the locking nut is prevented from being loosened by limiting the axial shift of the check body.
As a preferred variant, the U-shaped pin is made of a material having a certain elasticity and hardness, and the opening size of the open end is larger than that of the middle. Therefore, after the U-shaped pin passes through the two side through holes of the anti-loosening body and the U-shaped pin insertion groove on the joint body, the U-shaped pin cannot fall off.
The scheme of the variation example is that the anti-loose body and the locking nut are screwed together to form the combined nut, then the combined nut is screwed into the direction-adjustable end of the joint body, then the gasket and the sealing element are installed, the whole joint is screwed into the oil port according to the standard installation mode of the direction-adjustable joint, the direction is adjusted, and the locking nut is screwed according to the specified torque to form sealing; then screwing the anti-loosening body, screwing the non-threaded end of the anti-loosening body to the rear step of the direction-adjustable end of the joint body until the two end faces are contacted, and then screwing the anti-loosening body to a certain torque; and finally, the U-shaped pin penetrates through the side hole on the anti-loosening body and the U-shaped pin insertion groove on the joint body to prevent the axial movement of the anti-loosening body, so that the integral anti-loosening effect is formed.
(III) advantageous effects
The invention has the beneficial effects that: by adopting the locknut or the lockbody, the locknut is connected by two threads with different turning directions and/or different thread pitches, thereby preventing the connection between the locknut and the joint body from loosening and eliminating the potential safety hazard caused by loosening. The mechanism is convenient to disassemble and assemble, simple to manufacture and easy to standardize.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a variation of the embodiment of the present invention
FIG. 3 is a schematic view of a fitting body embodying aspects of the present invention
FIG. 4 is a schematic view of a U-shaped pin according to an embodiment of the present invention
FIG. 5 is a schematic view of a conventional direction-adjustable joint according to the present invention;
the reference numerals are illustrated below:
1 locking nut, 2 joint body, 2-1 gasket groove, 2-2U-shaped pin insertion groove, 2-3 back step, 3 locknut/lockbody, 4U-shaped pin, 5 gasket, 6 sealing element and 7 direction-adjustable end of direction-adjustable joint
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to the following embodiments.
Referring to fig. 1, a schematic diagram of an embodiment of the present invention:
firstly, screwing a locking nut 1 and a locknut 3 together to form a combined nut, screwing the combined nut on a joint body 2, and then installing a gasket 5 and a sealing element 6 to form an adjustable joint with an anti-loosening structure;
secondly, when the adjustable direction joint in the first step is installed on the oil port, the joint is connected with the oil port according to the conventional installation mode of the adjustable direction joint, the direction is adjusted, the locknut 1 is screwed up according to the specified torque, and then the locknut 3 is screwed until the side surface of the locknut contacts with the back step 2-3 of the joint body 2 and is screwed to a certain torque; and finally, the U-shaped pin 4 penetrates through a side hole on one side of the locknut 3 and the U-shaped pin insertion groove 2-2 on the joint body 2 and penetrates out of a side hole on the other side of the locknut, and the whole installation is completed.
Fig. 2 is a schematic diagram of a variation of the embodiment of the present invention, which is substantially similar to fig. 1 and will not be further described herein.
The specific working principle is as follows: the two sections of threads on the locknut 1 have different turning directions and/or thread pitches, so when the locknut 1 is connected to have a loosening trend due to the influence of internal and external factors in the whole connection, the thread connection on the locknut/anti-loose body 3 has different turning directions and/or thread pitches, and the axial movement of the locknut/anti-loose body 3 is limited, so the locknut/anti-loose body 3 can effectively block the loosening trend of the locknut 1.
The above is only the preferred embodiment of the present invention and a variation thereof, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various improvements and modifications can be made without departing from the spirit and scope of the invention, and these improvements and modifications should also be construed as within the scope of the invention.

Claims (8)

1. Adjustable locking mechanism to connecting including lock nut, connects the body, lock nut, gasket, sealing member and U-shaped round pin, connect and be provided with the screw thread of mutually supporting on body and the lock nut, its characterized in that:
the adjustable end of the joint body is provided with a gasket groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side, and the rear end of the external thread is provided with a rear step;
the inner thread of the locking nut is matched with the outer thread on the joint body, and one side of the locking nut is provided with the outer thread;
one end of the locknut is an internal thread, the internal thread is matched with an external thread of the locknut, the other end of the locknut is a stepped hole, the inner diameter of the stepped hole is larger than the major diameter of the thread at the adjustable end of the joint body, two side through holes which are parallel to each other are arranged on one side of the stepped hole of the locknut, and the center lines of the two side holes are parallel to the end surface of the locknut and are symmetrically distributed along the axis of the locknut;
the gasket is matched with the gasket groove on the joint body;
the cross-sectional width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the joint body, and the U-shaped pin is matched with a side through hole on the locknut.
2. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 1, wherein: the internal thread on the locking nut is opposite in rotation direction and/or different in thread pitch from the external thread.
3. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 1, wherein: the distance from the step at the rear end of the adjustable direction end of the joint body to the U-shaped pin insertion groove is slightly smaller than the distance from the end face of the non-threaded end of the locknut to the side through hole.
4. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 1, wherein: the U-shaped pin is made of a material with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part.
5. Adjustable locking mechanism to connecting including lock nut, connects the body, locking body, gasket, sealing member and U-shaped round pin, connect and be provided with the screw thread of mutually supporting on body and the lock nut, its characterized in that:
the adjustable end of the joint body is provided with a gasket groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side, and the rear end of the external thread is provided with a rear step;
the inner hole of the locking nut is provided with two sections of internal threads, wherein the internal threads with smaller diameters are matched with the external threads on the joint body;
the anti-loosening body is characterized in that an external thread is arranged on one side of the anti-loosening body, the external thread is matched with an internal thread with a larger diameter of the locking nut, two side through holes which are parallel to each other are arranged on the other side of the anti-loosening body, the center lines of the two side holes are parallel to the end face of the anti-loosening body and are symmetrically distributed along the axis of the anti-loosening body, and the diameter of the inner through hole of the anti-loosening body is larger than the major diameter of the thread of the joint body;
the gasket is matched with the gasket groove on the joint body;
the cross section width of the U-shaped pin is smaller than that of a U-shaped pin insertion groove on the joint body, and the U-shaped pin is matched with the side hole on the anti-loosening body.
6. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 5, wherein: the two sections of internal threads of the locking nut are opposite in screwing direction and/or different in thread pitch.
7. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 5, wherein: the distance from the step at the rear end of the adjustable direction end of the joint body to the U-shaped pin insertion groove is slightly smaller than the distance from the end face of the non-threaded end of the anti-loosening body to the side through hole.
8. The anti-loosening mechanism for an adjustable direction joint as claimed in claim 5, wherein: the U-shaped pin is made of a material with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part.
CN202011225902.7A 2020-11-05 2020-11-05 Anti-loosening mechanism of direction-adjustable joint Pending CN114440021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011225902.7A CN114440021A (en) 2020-11-05 2020-11-05 Anti-loosening mechanism of direction-adjustable joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011225902.7A CN114440021A (en) 2020-11-05 2020-11-05 Anti-loosening mechanism of direction-adjustable joint

Publications (1)

Publication Number Publication Date
CN114440021A true CN114440021A (en) 2022-05-06

Family

ID=81361216

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011225902.7A Pending CN114440021A (en) 2020-11-05 2020-11-05 Anti-loosening mechanism of direction-adjustable joint

Country Status (1)

Country Link
CN (1) CN114440021A (en)

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