Anti-loosening threaded self-locking quick-release pin structure

Abstract

The utility model relates to the technical field of mechanical connecting pieces, in particular to an anti-loosening threaded self-locking quick-release pin structure which comprises a pin body, a matching thread is arranged on the peripheral wall of the pin body, the matching thread is close to the end face of one side of the pin body, a locking nut is screwed to the matching thread, and a mounting notch is formed in the end face, away from the matching thread, of the pin body. An overturning blocking piece is rotationally arranged in the mounting notch, the peripheral wall of the pin body is sleeved with a pre-tightening spring, the pre-tightening spring is located on the side, away from the overturning blocking piece, of the locking nut, the end of the pre-tightening spring abuts against the side wall of the locking nut, and the other end of the pre-tightening spring is clamped on the pin body. And the effect of solving the problem of connection failure caused by axial movement of a traditional quick release pin in a vibration environment is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mechanical connecting pieces, in particular to a screw self-locking quick release pin structure capable of preventing loosening. BACKGROUND

[0002] At present, the quick release pin is a high-efficiency connecting means developed under the limitation of the traditional connecting mode, and can be quickly connected and separated through simple operation, is high in reliability, and is widely applied to the fields of mechanical manufacturing, automobiles, aerospace, building, electronic equipment and household products, and has the characteristics of high efficiency, convenience and wide application range.

[0003] The existing traditional quick release pin is connected through the spring-loaded buckle to realize quick plugging.

[0004] The prior art has the following defects: in the vibration scene, the gap between the pin body and the pin hole is prone to be generated due to axial movement, and the connection is loose. CONTENT OF THE UTILITY MODEL

[0005] The application provides the screw self-locking quick release pin structure capable of preventing loosening to solve the connection failure of the traditional quick release pin in the vibration environment due to axial movement.

[0006] The above technical purpose of the application is achieved through the following technical scheme:

[0007] The screw self-locking quick release pin structure capable of preventing loosening comprises a pin body, a matching thread is formed in the peripheral wall of the pin body, the matching thread is close to the end face of the pin body, a locking nut is screwed with the matching thread, an installation gap is formed in the end face of the pin body away from the matching thread, a turnover stop plate is rotationally arranged in the installation gap, a pre-tightening spring is sleeved on the peripheral wall of the pin body, the pre-tightening spring is located on the side of the locking nut away from the turnover stop plate, the end of the pre-tightening spring is in abutment with the side wall of the locking nut, and the other end of the pre-tightening spring is clamped on the pin body.

[0008] Through the above technical scheme, the matching thread in the peripheral wall of the pin body and the locking nut screwed with the matching thread are arranged, the installation gap is formed in the end face of the pin body away from the matching thread, and the turnover stop plate is rotationally arranged in the installation gap, so that the pin body can be axially limited through the turnover stop plate after installation, and the anti-loosening capability of the quick release pin in the vibration environment is improved. The pre-tightening spring is sleeved on the peripheral wall of the pin body, one end of the pre-tightening spring is in abutment with the side wall of the locking nut, and the other end of the pre-tightening spring is clamped on the pin body, so that the continuous axial pressure is provided for the locking nut in the vibration process, the friction pair is formed between the locking nut and the contact surface, the tendency of the rotation loosening of the locking nut is inhibited, and the reliability of the connection is maintained.

[0009] Optionally, the pin body comprises a cylindrical segment which is integrally formed and adjacent to the matching thread.

[0010] By adopting the technical scheme, the cylindrical section is beneficial to inserting the pin body into the pin hole, facilitating installation and disassembly.

[0011] Optionally, the end face edge of the pin body away from the threaded hole is processed into a conical shape.

[0012] By adopting the technical scheme, the conical end can position the pin hole faster, insert the pin body into the pin hole, and improve installation efficiency.

[0013] Optionally, the edge angle where the side wall of the turning stop sheet intersects with the end face is chamfered.

[0014] By adopting the technical scheme, the edge angle where the side wall of the turning stop sheet intersects with the end face is chamfered, which can reduce the interference between the edge angle and the side wall of the installation gap during the rotation of the turning stop sheet, thereby facilitating the rotation operation of the turning stop sheet to some extent, and making the installation and disassembly process smoother.

[0015] Optionally, a rotating column is arranged in the installation gap, and the turning stop sheet is sleeved on the peripheral wall of the rotating column.

[0016] By adopting the technical scheme, the rotating column is arranged in the installation gap, and the turning stop sheet is sleeved on the peripheral wall of the rotating column, which can provide a stable rotation center when the turning stop sheet rotates, thereby ensuring the rotation flexibility and positioning accuracy of the turning stop sheet to some extent, and facilitating quick positioning and fixing during installation.

[0017] Optionally, the connecting position of the rotating column (5) and the turning stop sheet (4) deviates from the center of the plate face of the turning stop sheet (4) and is close to the bottom of the installation gap (13).

[0018] By adopting the technical scheme, the turning stop sheet can sag by its own gravity, pull back the pin body to complete preliminary fixing, and provide a more stable fixing effect.

[0019] Optionally, the pin body is provided with a mounting ring at one end away from the turning stop sheet.

[0020] By adopting the technical scheme, the mounting ring facilitates pulling the quick release pin, and facilitates installation and disassembly of the quick release pin.

[0021] Optionally, the diameter of the mounting ring is greater than the diameter of the pre-tightening spring.

[0022] By adopting the technical scheme, the mounting ring can limit the pre-tightening spring on the side of the locking nut away from the turning stop sheet, reducing the possibility of displacement of the pre-tightening spring caused by vibration or external force.

[0023] Optionally, the mounting ring is a circular ring.

[0024] By adopting the technical scheme, the mounting ring in a circular shape can provide a more stable fixing effect compared to other shapes of the pre-tightening spring fixing structure.

[0025] Optionally, the pin body is provided with a mounting hole at the end of the peripheral wall away from the turning baffle, the mounting hole is communicated with the peripheral wall of the pin body away from each other, and the mounting ring is arranged in the mounting hole.

[0026] By adopting the technical scheme, the mounting ring is installed by being provided with the mounting hole, compared to being welded on the pin body, the maintenance and disassembly of the mounting ring are facilitated.

[0027] To sum up, the application has the following technical effects:

[0028] 1. By setting the matching thread of the peripheral wall of the pin body and the locking nut screwed with the matching thread, the mounting gap is arranged at the end of the pin body away from the matching thread, and the turning baffle is arranged in the mounting gap, the pin body can be axially limited by turning the baffle after installation, and the anti-loosening ability of the quick release pin in the vibration environment is improved. By sleeving the pre-tightening spring on the peripheral wall of the pin body, and making one end of the pre-tightening spring abut against the side wall of the locking nut and the other end of the pre-tightening spring clamped on the pin body, the locking nut can provide continuous axial pressure during vibration, so as to promote the locking nut and the contact surface to form a friction pair, which helps to inhibit the tendency of the locking nut to rotate and loosen, and maintains the reliability of the connection;

[0029] 2. By setting the conical end, the pin body can be positioned in the pin hole faster, the pin body is inserted into the pin hole, and the installation efficiency is improved;

[0030] 3. By processing the edge angle between the side wall of the turning baffle and the end face into a chamfer, the interference between the edge angle and the side wall of the mounting gap during the rotation of the turning baffle can be reduced, so as to facilitate the rotation operation of the turning baffle to a certain extent, and make the installation and disassembly process more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is an external structure diagram of the application.

[0032] Mark explanation: 1, pin body; 11, matching thread; 12, conical end; 13, mounting gap; 14, mounting hole; 2, locking nut; 3, pre-tightening spring; 4, turning baffle; 5, rotating column; 6, mounting ring. DETAILED DESCRIPTION

[0033] The application will be further described in detail below with reference to the drawings.

[0034] The application discloses a kind of anti-loosening threaded self-locking quick release pin structure inserted in pin hole, refer to Figure 1The quick release pin structure comprises a cylindrical pin body 1 made of metal, the pin body 1 comprising an integrally formed cylindrical section and a threaded section, the threaded section being a threaded section of a matching thread 11 coaxially formed on the peripheral wall of the pin body 1, the matching thread 11 being close to the end face of the pin body 1, the cylindrical section being conducive to the insertion of the pin body into the pin hole, facilitating installation and disassembly.

[0035] With reference to Figure 1 The end face of the pin body 1 away from the matching thread 11 is processed into a conical shape, and the conical end 12 can position the pin hole position faster, so that the pin body 1 is inserted into the pin hole, thereby improving the installation efficiency. The peripheral wall of the pin body 1 is sleeved with a locking nut 2, and the locking nut 2 is screwed with the matching thread 11.

[0036] With reference to Figure 1 The end face of the pin body 1 away from the matching thread 11 is provided with a strip-shaped installation gap 13 inwardly, the length direction of the installation gap 13 is parallel to the axis of the pin body 1, and the installation gap 13 is arranged in a spaced manner with the matching thread 11. A flip baffle 4 is arranged in the installation gap 13 by rotating a rotating column 5, the flip baffle 4 is a strip-shaped plate made of metal, the flip baffle 4 is adapted to the installation gap 13, and the plate surface of the flip baffle 4 is always parallel to the side wall of the installation gap 13.

[0037] With reference to Figure 1 The rotating column 5 is a cylinder, the rotating column 5 is close to the conical end 12, the end of the rotating column 5 penetrates into the pin body 1 and the flip baffle 4, the axis of the rotating column 5 is perpendicular to the plate surface of the flip baffle 4, the two end faces of the rotating column 5 are flush with the surfaces of the peripheral wall of the pin body 1 away from each other, the rotating column 5 is close to the bottom of the installation gap 13, and the connection position of the rotating column 5 and the flip baffle 4 deviates from the center of the plate surface of the flip baffle 4, so that the flip baffle 4 can sag by its own gravity. When the pin body 1 is inserted into the pin hole, the conical end 12 of the pin body 1 penetrates into one end of the pin hole, the length direction of the flip baffle is parallel to the axis of the pin body 1, the side walls of the flip baffle 4 away from each other are flush with the side wall edges of the installation gap 13, when the installation gap 13 is completely located at the other end of the pin hole, the flip baffle 4 is rotated, the length direction of the flip baffle 4 is perpendicular to the axis of the pin body 1, the locking nut 2 is rotated towards the flip baffle 4, the side wall of the locking nut 2 and the contact surface of one side of the pin hole form a friction pair, and the side wall of the flip baffle 4 and the contact surface of the other side of the pin hole abut.

[0038] With reference to Figure 1 The four corners where the side wall of the flip baffle 4 and the end face intersect are all processed to form chamfers, which facilitates the rotation of the flip baffle 4.

[0039] With reference to Figure 1, the pre-tightening spring 3 is sleeved on the side wall of the pin body 1 away from the turnover baffle 4, the end of the pre-tightening spring 3 close to the locking nut 2 is abutted against the side wall of the locking nut 2, the pre-tightening spring 3 continuously applies axial pressure to the locking nut 2, when the quick release pin is in a vibrating environment, vibration causes the locking nut 2 to tend to rotate and loosen, the axial pressure of the pre-tightening spring 3 is converted into friction force on the contact surface through the locking nut 2, a reverse torque is formed to inhibit rotation and maintain constant pre-tightening force.

[0040] With reference to Figure 1 , the end of the pin body 1 away from the turnover baffle 4 is provided with a mounting hole 14, the mounting hole 14 is communicated with the surfaces of the side walls of the pin body 1 away from each other.

[0041] With reference to Figure 1 , the mounting hole 14 is provided with a mounting ring 6, the mounting ring 6 is a circular ring, the diameter of the mounting ring 6 is greater than the diameter of the outer wall of the pre-tightening spring 3, the mounting ring 6 limits the pre-tightening spring 3 on the side of the locking nut 2 away from the turnover baffle 4, and the possibility of separation of the pre-tightening spring 3 from the pin body 1 during use of the quick release pin is reduced.

[0042] The specific embodiment is only an explanation of the application, and is not a limitation of the application, and those skilled in the art can make modifications to the embodiment without creative contribution according to the needs after reading the specification, as long as the modifications are within the scope of the claims of the application and are protected by the Patent Law.

Claims

1. A threaded self-locking quick-release pin structure for preventing loosening, characterized in that: The pin body (1) is provided with a matching thread (11) on the peripheral wall, the matching thread (11) is close to one side of the end face of the pin body (1), the matching thread (11) is screwed with a locking nut (2), the end face of the pin body (1) away from the matching thread (11) is provided with a mounting notch (13), the mounting notch (13) is provided with a turnover baffle (4) rotatingly arranged in the mounting notch (13), the pin body (1) is provided with a pre-tightening spring (3) sleeved on the peripheral wall, the pre-tightening spring (3) is located on the side of the locking nut (2) away from the turnover baffle (4), the end of the pre-tightening spring (3) abuts against the side wall of the locking nut (2), and the other end of the pre-tightening spring (3) is clamped on the pin body (1). The pin body (1) is provided with a mounting ring (6) on the end away from the turnover baffle.

2. The self-locking quick release threaded fastener structure of claim 1, wherein: The pin body (1) comprises a cylindrical section integrally formed and adjacent to the matching thread (11).

3. The self-locking quick release fastener according to claim 1, wherein: The end face of the pin body (1) away from the matching thread (11) is processed into a conical shape.

4. The self-locking quick release fastener according to claim 3, wherein: The side wall of the turnover baffle (4) is chamfered at the corner where the side wall intersects with the end face.

5. The self-locking quick release fastener according to claim 1, wherein: The mounting notch (13) is provided with a rotating column (5) arranged in the mounting notch (13).

6. The self-locking fast release thread structure of claim 1, wherein: The diameter of the mounting ring (6) is greater than the diameter of the pre-tightening spring (3).

7. The self-locking quick release fastener according to claim 6, wherein: The mounting ring (6) is a circular ring.

8. The self-locking quick release fastener according to claim 7, wherein: The peripheral end of the pin body (1) away from the turnover baffle (4) is provided with a mounting hole (14) communicating the peripheral walls of the pin body (1) away from each other, and the mounting ring (6) is arranged in the mounting hole (14).

9. The self-locking quick release fastener according to claim 5, wherein: The rotating column (5) is connected to the turnover baffle (4) at a position deviating from the center of the plate face of the turnover baffle (4) and close to the bottom of the mounting notch (13).

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