Self-locking quick-release pin based on pin petal structure

Abstract

The utility model discloses a self-locking quick-release pin based on a pin petal structure. The self-locking quick-release pin comprises a pin shaft (1) and a pin rod (2). The pin shaft comprises a pin shaft cap (11), a shaft body (10) and a push rod hole (12), a cavity is formed in the tail end of the shaft body and comprises a spring cavity (13) and a petal lug sliding guide groove (15), the left side and the right side of the spring cavity are each provided with a pin petal hidden groove (14), and an opening in the side edge of each pin petal hidden groove penetrates through the shaft body (10); the spring supporting sheet (17) is matched with the spring (16) for use; the pin rod (2) comprises a pin petal pressing rod (21), a pressing piece (22) is arranged at one end of the pin petal pressing rod (21), a pin petal trunnion (23), a left pin petal (24) and a right pin petal (25) are arranged at the other end of the pin petal pressing rod (21), and the pin petal trunnion is sleeved with the two pin petals. The pin is easy and convenient to operate, rapid in self-locking and disassembling, reasonable in structural design, capable of effectively guaranteeing the strength of the pin shaft, low in machining precision requirement, suitable for various equipment structures and wide in application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mechanical parts connection, concretely relates to a self-locking quick-release dowel based on pin petal structure. BACKGROUND

[0002] Dowel as a common fastener is mainly used for fixing multiple separate objects together, or suspending one object on another as a support, and is widely used in the connection and fixation of mechanical equipment. The existing dowel usually needs a special anti-dropping device, such as inserting a split pin, beta pin, etc. in the dowel hole, and the installation and disassembly process is relatively complicated.

[0003] The existing self-locking dowel has the following technical defects:

[0004] 1. Pin piece type self-locking pin (such as patent document with announcement number CN 222102509 U): when disassembling, the pin shaft needs to be pressed first, and then the pin piece or end shaft is separated from the workpiece surface, and then the pin piece or end shaft is inserted into the groove at the end of the pin shaft, and finally it can be pulled out. The disassembly process is relatively complex, and since a relatively long groove needs to be opened at the end of the pin shaft, the stress performance of the end of the pin shaft is greatly affected, stress concentration is easily generated, and the strength and service life of the dowel are affected.

[0005] 2. Sectional type self-locking pin (such as patent document with publication number CN 118998179 A): although this design simplifies the disassembly process to some extent, it still needs to be manually operated, and the disassembly steps are still complicated. In addition, the opening range of the end of the pin shaft is large, which weakens the structural strength of the pin shaft, causing it to easily deform or break under stress, affecting the reliability of the dowel.

[0006] 3. Ball self-locking pin: the height of the ball protruding from the surface of the pin shaft is limited, and when the difference between the diameter of the shaft hole and the diameter of the pin shaft exceeds the height of the ball protruding, the anti-dropping device may fail, causing the dowel to be unable to be effectively fixed. In addition, the ball self-locking pin has high machining precision requirements, and is usually only suitable for precision equipment, with limited application range, which is difficult to meet the needs of ordinary mechanical equipment.

[0007] In summary, the existing self-locking dowel has certain limitations in terms of disassembly convenience, structural strength, and application range, and a more efficient and reliable self-locking dowel design is needed to solve these problems. INVENTION CONTENTS

[0008] Based on the above technical defects, the present application provides a self-locking quick-release dowel based on pin petal structure, and the specific scheme is as follows:

[0009] A self-locking quick-release dowel based on pin petal structure is provided, which comprises a pin shaft and a pin rod movably inserted into the pin shaft body.

[0010] The pin shaft comprises a pin shaft head, a shaft body arranged at one end of the pin shaft head, a push rod hole formed in the center of the shaft body, a cavity formed at the end of the push rod hole, the cavity comprising a spring cavity and a petal ear sliding guide groove, a spring cavity and a spring cavity are arranged on the left and right sides of the spring cavity, and the side edge opening of the spring cavity is connected through the shaft body; and a spring and a spring holder used in cooperation with the spring, the spring and the spring holder are installed in the spring cavity;

[0011] The pin rod comprises a pin lever, a pressing piece arranged at one end of the pin lever, a pin ear shaft arranged at the other end of the pin lever, and a left pin and a right pin, the left pin and the right pin are respectively sleeved on the pin ear shaft from the upper and lower directions.

[0012] Further, the left pin and the right pin are both provided with a petal ear, the petal ear is provided with a sleeve with an ear hole in the center, and the petal ear is sleeved on the pin ear shaft.

[0013] Further, the left pin and the right pin can rotate in the left and right pin hidden grooves respectively, and in the natural state, the left pin and the right pin are in the flat state, the edges of the two pins are exposed, and the edges of the two pins are outside the contour of the shaft body, forming a obvious protruding part.

[0014] Further, the self-locking quick-release pin cooperates with the shaft hole of the external workpiece to be connected, and during the process of inserting the pin into the shaft hole, the left pin and the right pin are pressed or pressed after the pressing piece, and are rotated around the pin ear shaft and shrink into the left and right pin hidden grooves respectively.

[0015] Further, after the pin is completely inserted into the shaft hole, the left pin and the right pin are in the flat state again under the action of the spring.

[0016] Further, during the process of pulling out the pin from the shaft hole, the left pin and the right pin are pressed after the pressing piece, and are rotated around the pin ear shaft and shrink into the left and right pin hidden grooves respectively.

[0017] Further, after the pin is completely pulled out of the shaft hole, the left pin and the right pin are in the flat state again under the action of the spring.

[0018] The beneficial effects of the present application are as follows: the self-locking quick-release pin based on the pin lever structure can quickly realize the self-locking and dismounting of the pin through the insertion and pulling of the pin lever in the pin shaft, which specifically shows that:

[0019] 1、Compared with the existing pin piece type self-locking pin or segmented type self-locking pin, the pin of the application is used, one end of the pin shaft with the pin petal is aligned with the shaft hole and inserted, the left and right pin petals are blocked and extruded by the side wall of the shaft hole, and are relatively rotated around the pin petal ear shaft and shrink into the pin petal hidden groove, until the pin shaft can be smoothly inserted into the shaft hole; when the left and right pin petals pass out from the other end of the shaft hole, the two pin petals slide upward together with the pin rod under the spring elastic force, forcing the left and right pin petals to rotate in the opposite direction around the pin petal ear shaft and extend out of the pin petal hidden groove, until the left and right pin petals automatically flatten, at this time the pin shaft is constrained in the shaft hole by the pin petals, realizing self-locking. Conversely, when disassembling, by pressing the pressing piece, the pressing piece pushes the pin petal pressing rod, and then drives the left and right pin petals sleeved on the pin petal ear shaft at the end of the pin petal pressing rod to rotate, the left and right pin petals are simultaneously shrunk into the left and right pin petal hidden grooves, and then the pin shaft is pulled out, so that the entire pin is quickly pulled out from the shaft hole, the entire self-locking and disassembling process is simple and fast, and the operation efficiency is significantly improved.

[0020] 2、The cavity opened at the end of the effective stress section of the pin shaft occupies a small part of the volume of the entire pin shaft, which will not have too much adverse effect on the stress of the pin shaft, effectively guaranteeing the structural strength and reliability of the pin shaft, and prolonging the service life of the pin.

[0021] 3、Compared with the existing ball self-locking pin, the pin of the application has low machining precision requirement, can be applied to more types of equipment structures, is widely used, and has strong universality and practicality.

[0022] In summary, the pin of the application not only has simple operation, fast self-locking and disassembling, but also has reasonable structure design, which can effectively guarantee the strength of the pin shaft, and has low machining precision requirement, and is suitable for various equipment structures, and has wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an explosion structure schematic diagram of the self-locking and quick disassembling pin based on the pin petal structure of the application;

[0024] Figure 2 is a half-section assembly structure schematic diagram of Figure 1 ;

[0025] Figure 3 is a perspective structure schematic diagram of Figure 1 ;

[0026] Figure 4 is a corresponding front view structure schematic diagram of Figure 3 ;

[0027] Figure 5 is a structure schematic diagram of the self-locking and quick disassembling pin based on the pin petal structure of the application when the pin is inserted into the workpiece to be connected;

[0028] Figure 6 isFigure 5 Structure diagram of the pin in the process of penetrating the shaft hole;

[0029] Figure 7 Figure 6 Structure diagram of the pin achieving self-locking after penetrating the shaft hole completely;

[0030] Figure 8 Structure diagram of the pin based on the pin petal structure in the process of pulling out the shaft hole;

[0031] Figure 9 Figure 8 Structure diagram of the pin in the process of penetrating the shaft hole;

[0032] Figure 10 Figure 9 Structure diagram of the pin after pulling out the shaft hole.

[0033] Reference signs:

[0034] 1-pin shaft, 10-shaft body, 11-pin shaft end, 12-push rod hole, 13-spring cavity, 14-pin petal hidden groove, 15-petal ear sliding guide groove, 16-spring, 17-spring holder;

[0035] 2-pin rod, 21-pin petal pressing rod, 22-pressing piece, 23-pin petal ear shaft, 24-left pin petal, 25-right pin petal, 26-petal ear, 261-ear hole;

[0036] 3-workpiece to be connected, 31-shaft hole. DETAILED DESCRIPTION

[0037] The specific embodiments of the present application will be described below in conjunction with the drawings, so that those skilled in the art can better understand the present application.

[0038] As shown in the drawings, the present application provides a pin petal structure based self-locking quick-release pin, which comprises a pin shaft 1 and a pin rod 2 movably inserted into the pin shaft 1; Figures 1-4

[0039] The pin shaft 1 comprises a pin shaft end 11, a shaft body 10 arranged at one end of the pin shaft end 11, a push rod hole 12 arranged at the center of the shaft body 10, a cavity arranged at the end of the push rod hole 12, the cavity comprising a spring cavity 13 and a petal ear sliding guide groove 15, a pin petal hidden groove 14 arranged at the left and right sides of the spring cavity 13, the side edge of the pin petal hidden groove 14 being open through the shaft body 10, and a spring 16 and a spring holder 17 used in cooperation with the spring 16, the spring 16 and the spring holder 17 being installed at the spring cavity 13;

[0040] ​​​​The pin rod 2 comprises a pin petal pressing rod 21, a pressing sheet 22 arranged at one end of the pin petal pressing rod 21, a pin petal trunnion 23 arranged at the other end of the pin petal pressing rod 21, and a left pin petal 24 and a right pin petal 25, wherein the left pin petal 24 and the right pin petal 25 are both provided with a petal trunnion 26, the petal trunnion 26 is provided with a sleeve hole 261 in the center, the petal trunnion 26 is sleeved on the pin petal trunnion 23 and can slide along the petal sliding guide groove 15.

[0041] The left pin petal 24 and the right pin petal 25 can rotate in the left and right pin petal hidden grooves 14 respectively, in the non-working state, the spring 16 is in the compressed state, the spring 16 and the spring holding sheet 17 lift the pin petal trunnion 23 and the left pin petal 24 and the right pin petal 25 sleeved thereon, so that the two pin petals are in the flattened state (see Figure 4 )。

[0042] As shown in Figures 5 to 7 , the self-locking quick-release pin based on the pin petal structure described in the present application is generally used in cooperation with the workpiece 3 to be connected on the mechanical equipment, the workpiece 3 to be connected is generally provided with a shaft hole 31, and the self-locking quick-release pin based on the pin petal structure is realized in the following process.

[0043] Firstly, as shown in Figure 5 , the pin shaft 1 is inserted into the shaft hole 31 in alignment, the left pin petal 24 and the right pin petal 25 are pressed upward by the side wall of the shaft hole 31, the two pin petals rotate according to the direction A in Figure 5 , and the left pin petal 24 and the right pin petal 25 are respectively retracted into the left and right pin petal hidden grooves 14.

[0044] Secondly, as shown in Figure 6 , during the insertion of the pin shaft 1 into the shaft hole 31, the two pin petals are always retracted into the left and right pin petal hidden grooves 14 under the pressing of the side wall of the shaft hole.

[0045] Finally, as shown in Figure 7 , when the end of the pin shaft 1 is inserted out of the shaft hole 31, the two pin petals are no longer pressed by the side wall of the shaft hole 31, and under the elastic force of the spring 16, the left pin petal 24 and the right pin petal 25 are ejected from the left and right pin petal hidden grooves 14 until they are completely flattened. At this time, the left and right pin petals have contacted each other at the inner end of the pin petal trunnion 23 and cannot continue to rotate around the pin petal trunnion 23, thereby preventing the pin shaft 1 from being pulled out of the shaft hole 31, and realizing the anti-withdrawal function of the pin.

[0046] As shown in Figures 8 to 9 , the disassembly process of the self-locking quick-release based on the pin petal structure in the present application.

[0047] Firstly, as shown in Figure 8As shown, when the self-locking pin needs to be removed, an external force presses the pressing piece 22, which drives the pin segment ear shaft 23 to move downward through the pin segment pressing rod 21. At this time, the left pin segment 24 and the right pin segment 25 sleeved on the pin segment ear shaft 23 rotate around the pin segment ear shaft 23 under the elastic force of the spring 16 and shrink into the left and right pin segment hidden grooves 14, respectively. At the same time, the pin shaft protrusion 11 is pulled upward, so that the entire pin shaft 1 moves upward with the pin rod 2 into the shaft hole 31.

[0048] Secondly, as shown in Figure 9 During the upward pulling process of the pin shaft 1 in the shaft hole 31, the two sides of the pin segment are always shrunk in the two sides of the pin segment hidden groove 14.

[0049] Finally, as shown in Figure 10 When the entire pin shaft 1 is completely pulled out of the shaft hole 31, the two sides of the pin segment are no longer extruded, and the left pin segment 24 and the right pin segment 25 are ejected from the two sides of the pin segment hidden groove 14 under the elastic force of the spring 16 until they are completely flattened.

[0050] For the convenience of quick disassembly, a pull ring can be provided outside the pin shaft protrusion 11 according to actual needs.

[0051] By applying the self-locking quick-release pin described in the present application, the self-locking and disassembly between the pin and the workpiece to be connected can be quickly realized, and the pin can be repeatedly used and is suitable for various mechanical equipment.

[0052] The above is only a feasible implementation example of the present application, and does not limit the scope of the present application. Any equivalent structural changes made by applying the present application are included in the protection scope of the present application.

Claims

1. A self-locking quick release pin based on a pin petal structure, characterized in that: The pin shaft (1) and the pin rod (2) movably inserted into the pin shaft (1) body. The pin shaft (1) comprises a pin shaft head (11), a shaft body (10) arranged at one end of the pin shaft head (11), a push rod hole (12) formed in the center of the shaft body (10), a cavity formed at the end of the push rod hole (12) close to the end of the shaft body (10), the cavity comprising a spring cavity (13) and a petal ear sliding guide groove (15), a pin petal hidden groove (14) arranged on the left and right sides of the spring cavity (13) respectively, the side edge opening of the pin petal hidden groove (14) penetrating through the shaft body (10), and a spring (16) and a spring supporting plate (17) used in cooperation with the spring (16), wherein the spring (16) and the spring supporting plate (17) are installed in the spring cavity (13). The pin rod (2) comprises a pin petal pressing rod (21), a pressing piece (22) arranged at one end of the pin petal pressing rod (21), a pin petal ear shaft (23) arranged at the other end of the pin petal pressing rod (21), and a left pin petal (24) and a right pin petal (25), wherein the left pin petal (24) and the right pin petal (25) are respectively sleeved on the pin petal ear shaft (23) from the upper and lower directions.

2. A self-locking quick release pin based on a pin segment structure according to claim 1, characterized in that: The left pin petal (24) and the right pin petal (25) are both provided with a petal ear (26), the petal ear (26) is a sleeve with an ear hole (261) formed in the center, and the petal ear (26) is sleeved on the pin petal ear shaft (23).

3. A self-locking quick release pin based on a pin segment structure according to claim 1 or 2, characterized in that: The left pin petal (24) and the right pin petal (25) can rotate in the left and right pin petal hidden grooves (14) respectively, and in the natural state, the left pin petal (24) and the right pin petal (25) are in the flat state.

4. A self-locking quick release pin based on a pin segment structure according to claim 1 or 2, characterized in that: The self-locking quick-release pin cooperates with the shaft hole (31) of the external workpiece (3) to be connected, and during the process of inserting the pin into the shaft hole (31), the left pin petal (24) and the right pin petal (25) are pressed by the wall of the shaft hole (31) or are pressed after the pressing piece (22) is pressed, and are respectively rotated around the pin petal ear shaft (23) and contracted into the left and right pin petal hidden grooves (14).

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