Quick bolt

Abstract

The utility model belongs to the technical field of bolts, and particularly relates to a quick bolt which solves the problem that fixation and limiting in the axial direction cannot be achieved. The quick plug pin comprises a tubular base body, a rotating column is rotationally connected into the base body, a pin tongue is arranged on the rotating column, a via hole for the pin tongue to extend out in the radial direction is formed in the base body, and the pin tongue is connected with an elastic structure and has the elastic trend of extending out in the radial direction. A retraction guide structure driven by relative rotation of the base body and the rotary column is arranged between the pin tongue and the base body, and a limiting part protruding in the radial direction is arranged on the base body. And the effect of radially and axially limiting a plurality of objects is achieved, and the practicability is high.

Description

Technical Field

[0001] This utility model belongs to the field of latches, and specifically relates to a quick-release latch. Background Technology

[0002] Pins are widely used for limiting and fixing multiple objects; they are simple in structure and practical.

[0003] Most of the pins in the existing technology are columnar structures. The pins are inserted into the pin holes of two objects to be fixed at the same time to achieve radial limiting and fixing. However, this simple structure cannot achieve axial limiting and is not very practical. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a quick-release pin.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A quick-release pin includes a tubular base, a rotating post rotatably connected within the base, a pin tongue on the rotating post, a through hole on the base for the pin tongue to extend radially, the pin tongue being connected to an elastic structure and having an elastic tendency to extend radially, a retraction guide structure driven by the relative rotation of the base and the rotating post between the pin tongue and the base, and a radially protruding limiting portion on the base.

[0007] This invention relates to a quick-release pin for fixing two or more objects. A rotating pin, inserted into a base, is cylindrical and can be inserted into the pin hole of the object to be fixed. A pin tongue is provided on the base, which can radially extend and retract through a through hole in the base. When the pin tongue extends, it forms a locking space with a limiting part on the base, which can limit and fix the object in the axial direction, thus achieving axial and radial limiting of the base. The retraction guide structure controls the retraction of the pin tongue by rotating the rotating pin relative to the base, ensuring that the base is smoothly inserted into the pin hole. The elastic structure allows the pin tongue to extend out of the through hole after the base rotates in the opposite direction or when the rotation of the rotating pin is not restricted, ensuring smooth locking.

[0008] In the aforementioned quick-release pin, the rotating column sidewall is provided with a radially extending pin tongue groove, the pin tongue is slidably connected in the pin tongue groove, and the elastic structure is disposed between the pin tongue groove and the pin tongue.

[0009] The pin tongue groove is located on the side wall of the rotating column, and the inner section of the pin tongue matches the pin tongue groove, so that the pin tongue can slide stably in the pin tongue groove.

[0010] In the aforementioned quick-release pin, the elastic structure includes a spring, and a spring groove is provided radially extending from the bottom of the pin tongue groove. The spring is disposed within the spring groove, and its two ends are respectively connected to the bottom of the spring groove and the bottom surface of the pin tongue.

[0011] The bottom of the pin tongue groove is provided with a spring groove. This spring groove is used to position the spring on the one hand, and to leave space for the minimum length of the spring after compression on the other hand. Of course, a conical spring can also be used. Since the thickness after compression is very small, the bottom of the groove does not need to be provided with a spring groove.

[0012] In the aforementioned quick-release pin, the retraction guide structure includes an outer guide slope disposed at the front end of the pin tongue, the outer guide slope being inclined inward in the circumferential direction.

[0013] The distance between the outer guide ramp and the axis gradually changes in the circumferential direction. When the rotating column and the base rotate relative to each other, the outer guide ramp and the corresponding mating parts cooperate to push the pin tongue inward and guide it, so as to achieve the effect of retracting the pin tongue. Of course, a surface that extends almost radially is formed on the side of the outer guide ramp away from the bottom of the ramp. This surface is used to limit the reverse rotation of the rotating column.

[0014] In the aforementioned quick-release pin, the outer guide slope includes a circumferentially distributed slope bottom and slope top; the side of the through hole near the slope bottom is provided with an inner guide slope that is inclined in the circumferential direction, and the inner guide slope is slidably connected to the outer guide slope; or the side of the through hole near the slope bottom extends radially, and the outer guide slope is slidably connected to the inner periphery of the through hole.

[0015] The outer guide slope contacts the inner guide slope of the through hole or the inner periphery at a right angle. The two slide in contact, and the circumferential slope guides the inward retraction of the pin tongue. Of course, the inner guide slope is preferred for this contact, as it can reduce wear error.

[0016] In the aforementioned quick-release pin, the cross-section of the base is circular or regular hexagonal, and the pin hole on the object to be fixed is a matching circular or regular hexagonal hole.

[0017] The cross-section of the substrate can also be set to a non-circular shape. Of course, the shape of the via can match it. When the substrate is inserted into the via, it can also be limited in the circumferential direction. The non-circular shape can be elliptical, triangular, quadrilateral, pentagonal or hexagonal, but regular hexagonal is preferred.

[0018] In the aforementioned quick-release pin, the pin tongue side is provided with an anti-disengagement part, and the anti-disengagement surface of the anti-disengagement part abuts against the inner periphery of the through hole and / or the inner sidewall of the base.

[0019] The anti-detachment part is used to prevent the pin tongue from coming out of the through hole, or to limit its maximum extension length. This also allows the outer guide slope and the corresponding mating surface to not need to maintain contact and fit in real time. They can achieve and start fitting after rotating a certain angle. The anti-detachment part is protruding on the side of the pin tongue and abuts against the through hole or the inner wall of the base to achieve the limit.

[0020] Preferably, the anti-detachment part is located on the side of the pin tongue away from the bottom of the slope, and the anti-detachment surface extends along the circumferential direction of the substrate or is further inclined inward in the circumferential direction.

[0021] The anti-detachment part is located on the side away from the bottom of the slope, which allows the two sides of the pin tongue to abut against the base through the anti-detachment part and the outer guide slope, so that the force is evenly distributed.

[0022] In the aforementioned quick-release pin, the side of the rotating pin is provided with a radially extending limiting pin, and the side wall of the base is provided with a circumferentially extending limiting slot. The outer end of the limiting pin is limited within the limiting slot, but does not protrude from the outer side wall of the base.

[0023] The rotating column is provided with a limiting post mounting hole on its side, and the limiting post can be detachably fixed in the limiting post mounting hole.

[0024] The limiting post is confined within the limiting slot and cannot move axially relative to the base body, but it can rotate within a certain angle. This angle corresponds to the rotation angle when the pin tongue is fully extended and fully retracted. The outer end of the limiting post does not protrude from the outer wall of the base body, ensuring smooth insertion of the base body into the pin hole. Furthermore, the limiting post is mounted on the limiting post mounting hole, and this connection offers flexible detachability. This can be achieved through methods such as threaded connection or tight-fitting snap-fit.

[0025] In the aforementioned rotating column mounting hole, the limiting part includes a limiting flange that is provided on the upper end of the base and protrudes radially; the upper end of the rotating column is provided with a positioning flange that protrudes radially, and the bottom surface of the positioning flange is in contact with the top surface of the base.

[0026] A limiting flange is provided on the upper part of the base. The limiting flange protrudes radially from the side wall of the base and is preferably annular in shape. The bottom surface of the limiting flange is in contact with the object to be fixed and cooperates with the pin to lock the object between them. A similar positioning flange is provided on the rotating column, which can limit the insertion depth of the rotating column.

[0027] In the aforementioned quick-release pin, a rotating post mounting hole is axially provided through the base, and the inner diameter of the rotating post mounting hole is adapted to the outer diameter of the rotating post; both the base and the rotating post have chamfers between their bottom and outer surfaces; and an operating part is provided on the top surface of the rotating post.

[0028] The base is tubular, with an axially penetrating rotating column mounting hole inside for mounting the rotating column. The chamfers at the front ends of the base and the rotating column help them to be inserted into the corresponding positions. The operating part is located on the top surface of the rotating column for the user to rotate. Its shape can be sheet-like, cross-shaped, or columnar with rough sides, but sheet-like is preferred.

[0029] Compared with the prior art, the present invention has the following main advantages:

[0030] 1. This quick-release pin is used to fix multiple objects relatively. The rotating post is inserted into the base and is cylindrical in shape. It can be inserted into the pin hole of the object to be fixed. The base has a pin tongue, which can radially extend and retract through the through hole on the base. When the pin tongue extends, it forms a locking space with the limiting part on the base, which can limit and fix the object in the axial direction. The retraction guide structure realizes the retraction control of the pin tongue by the circumferential rotation of the rotating post relative to the base, ensuring that the base is smoothly inserted into the pin hole. The elastic structure can make the pin tongue extend out of the through hole after the base is rotated in the opposite direction or when the rotation of the rotating post is not restricted, ensuring that the locking is successfully achieved.

[0031] 2. The cross-section of the substrate and the shape of the via are mutually matched non-circular shapes, which can also limit the circumferential direction when the substrate is inserted into the via. This non-circular shape is preferably a regular hexagon.

[0032] 3. The distance between the outer guide slope and the axis gradually changes in the circumferential direction. When the rotating column and the base rotate relative to each other, the outer guide slope cooperates with the corresponding mating parts to achieve the effect of retracting the pin tongue.

[0033] 4. The anti-detachment part is used to prevent the pin tongue from coming out of the through hole, or in other words, to limit its maximum extension length.

[0034] 5. The limiting post is confined within the limiting slot and cannot move axially, but it can rotate within a certain angle. This angle corresponds to the rotation angle when the pin tongue is fully extended and fully retracted. The outer end of the limiting post does not protrude from the outer wall of the base, ensuring that the base can be smoothly inserted into the pin hole. Moreover, the limiting post is installed on the limiting post mounting hole, and this connection has flexible detachability. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure provided by this utility model (Example 1);

[0036] Figure 2 This is a front view schematic diagram provided by this utility model (Example 1);

[0037] Figure 3 yes Figure 2 Schematic diagram of the cross section at point AA;

[0038] Figure 4 yes Figure 2 Schematic diagram of the cross section at point BB;

[0039] Figure 5 This is a schematic diagram of the structure of the substrate provided by this utility model (Example 1);

[0040] Figure 6 This is a schematic diagram of the rotating column provided by this utility model;

[0041] Figure 7 This is a schematic diagram of the pin tongue structure provided by this utility model;

[0042] Figure 8 This is a cross-sectional schematic diagram of the base and the pivot insertion pin hole provided by this utility model (Example 2).

[0043] In the figure, 1 is the base, 2 is the rotating column, 3 is the pin tongue, 4 is the through hole, 5 is the elastic structure, 6 is the retractable guide structure, 7 is the limiting part, 8 is the pin tongue groove, 9 is the spring, 10 is the spring groove, 11 is the outer guide slope, 12 is the bottom of the slope, 13 is the top of the slope, 14 is the inner guide slope, 15 is the anti-detachment part, 16 is the anti-detachment surface, 17 is the pin hole, 18 is the limiting column, 19 is the limiting groove hole, 20 is the limiting column mounting hole, 21 is the limiting flange, 22 is the positioning flange, 23 is the rotating column mounting hole, and 24 is the operating part. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] Example 1

[0046] Specific implementation examples Figure 1-7 As shown, this quick-release pin includes a circular tubular base 1, a rotating post 2 rotatably connected inside the base 1, a pin tongue 3 on the rotating post 2, a through hole 4 on the base 1 for the pin tongue 3 to extend radially, the pin tongue 3 being connected to an elastic structure 5 and having an elastic tendency to extend radially, a retractable guide structure 6 between the pin tongue 3 and the base 1 being driven by the relative rotation of the base 1 and the rotating post 2, and a radially protruding limiting part 7 on the base 1.

[0047] Specifically, this quick-release pin is used to fix two objects relative to each other. The rotating post 2 is inserted into the base 1 and is cylindrical in shape. It can be inserted into the pin hole 17 of the object to be fixed. The base 1 is provided with a pin tongue 3, which can radially extend and retract through the through hole 4 on the base 1. When the pin tongue 3 extends, it forms a locking space with the limiting part 7 on the base 1. The retraction guide structure 6 realizes the retraction control of the pin tongue 3 by the circumferential rotation of the rotating post 2 relative to the base 1, ensuring that the base 1 is smoothly inserted into the pin hole 17. The elastic structure 5 can make the pin tongue 3 extend out of the through hole 4 after the base 1 is rotated in the opposite direction or when the rotation of the rotating post 2 is not restricted, ensuring that the locking is successfully achieved.

[0048] like Figure 1 , 2 As shown in Figures 3 and 4, a radially extending pin groove 8 is provided on the side wall of the rotating column 2. The pin 3 is slidably connected in the pin groove 8. The elastic structure 5 includes a spring 9. A spring groove 10 is provided radially at the bottom of the pin groove 8. The spring 9 is provided in the spring groove 10, and its two ends are respectively connected to the bottom of the spring groove 10 and the bottom surface of the pin 3.

[0049] Specifically, the pin tongue groove 8 is provided on the side wall of the rotating column 2, and the inner section of the pin tongue 3 matches the pin tongue groove 8, so that the pin tongue 3 can slide stably in the pin tongue groove 8. The bottom of the pin tongue groove 8 is provided with a spring groove 10, which is used to position the spring 9 on the one hand, and to leave space for the minimum length of the spring 9 after compression on the other hand.

[0050] like Figure 1 , 4 As shown in Figures 5 and 6, the retractable guide structure 6 includes an outer guide slope 11 located at the front end of the pin tongue 3, which is inclined inward in the circumferential direction. The outer guide slope 11 includes a slope bottom 12 and a slope top 13 distributed circumferentially; an inner guide slope 14 inclined in the circumferential direction is provided on the side of the through hole 4 near the slope bottom 12, and the inner guide slope 14 is slidably connected to the outer guide slope 11.

[0051] Specifically, the distance between the outer guide slope 11 and the axis gradually changes in the circumferential direction. During the relative rotation of the rotating column 2 and the base 1, the outer guide slope 11 cooperates with the inner guide slope 14, allowing the pin tongue 3 to be pressed inwards, achieving the effect of retracting the pin tongue 3. Of course, a nearly radially extending surface is formed on the side of the outer guide slope 11 away from the slope bottom 12; this surface is used to limit the reverse rotation of the rotating column 2. The outer guide slope 11 slides in contact with the inner guide slope 14 of the through hole 4, and the circumferentially varying slope guides the inward retraction of the pin tongue 3.

[0052] like Figure 4 , 6As shown in Figures 7 and 8, the pin tongue 3 has an anti-detachment part 15 on its side. The anti-detachment surface 16 of the anti-detachment part 15 abuts against the inner periphery of the through hole 4 and the inner sidewall of the base 1. The anti-detachment part 15 is located on the side of the pin tongue 3 away from the bottom of the slope 12, and the anti-detachment surface 16 extends along the circumferential direction of the base 1 or is further inclined inward in the circumferential direction.

[0053] Specifically, the anti-detachment part 15 is used to prevent the pin tongue 3 from coming out of the through hole 4 and also limits its maximum extension length. The anti-detachment part 15 is located on the side away from the bottom of the slope 12, so that the two sides of the pin tongue 3 can abut against the base 1 through the anti-detachment part 15 and the outer guide slope 11 respectively, so that the force is evenly distributed.

[0054] like Figure 1 , 5 As shown in Figure 6, the side of the rotating column 2 is provided with a radially extending limiting post 18, and the side wall of the base 1 is provided with a circumferentially extending limiting slot 19. The outer end of the limiting post 18 is limited in the limiting slot 19, but does not protrude from the outer side wall of the base 1. The side of the rotating column 2 is provided with a limiting post mounting hole 20, and the limiting post 18 can be detachably fixed in the limiting post mounting hole 20.

[0055] Specifically, the limiting post 18 is confined within the limiting slot 19 and cannot move axially relative to the base 1, but it can rotate within a certain angle. This angle corresponds to the rotation angle of the pin tongue 3 when it is fully extended and fully retracted. The outer end of the limiting post 18 does not protrude from the outer wall of the base 1, ensuring that the base 1 can be smoothly inserted into the pin hole 17. Moreover, the limiting post 18 is mounted on the limiting post mounting hole 20, and this connection has flexible detachability. Specifically, this can be achieved through a threaded connection.

[0056] like Figure 1 , 2 As shown in Figures 3, 5, and 6, the limiting part 7 includes a limiting flange 21 that is radially protruding from the upper end of the base 1; a positioning flange 22 that is radially protruding from the upper end of the rotating column 2, with the bottom surface of the positioning flange 22 abutting against the top surface of the base 1. A rotating column mounting hole 23 is axially provided inside the base 1, and the inner diameter of the rotating column mounting hole 23 is adapted to the outer diameter of the rotating column 2; both the base 1 and the rotating column 2 have chamfers between their bottom and outer surfaces; and an operating part 24 is provided on the top surface of the rotating column 2.

[0057] Specifically, a limiting flange 21 is provided on the upper part of the base 1. This limiting flange 21 protrudes radially from the side wall of the base 1, and is preferably annular in shape. The bottom surface of the limiting flange 21 is in contact with the object to be fixed, and cooperates with the pin tongue 3 to achieve the effect of locking the object between them. A similar positioning flange 22 is provided on the rotating column 2, which can limit the insertion depth of the rotating column 2. The base 1 is tubular, and the rotating column mounting hole 23 that penetrates through it is used to set the rotating column 2. The chamfers provided at the front ends of the base 1 and the rotating column 2 help to insert them into the corresponding positions. The operating part 24 is provided on the top surface of the rotating column 2 for the user to rotate, and its shape is plate-shaped.

[0058] The specific working principle is as follows: When it is necessary to lock two plate-shaped mounting parts, align the pin holes 17 of the two plate-shaped mounting parts, rotate the rotating column 2 until the pin tongue 3 is retracted, and then insert the base 1 and the rotating column 2 into the pin holes 17 until the bottom surface of the limiting flange 21 abuts against the upper plate-shaped mounting part. Then rotate the rotating column 2 in the opposite direction, and the pin tongue 3 extends out from below the lower plate-shaped mounting part. The upper end face of the pin tongue 3 almost abuts against the top surface of the lower plate-shaped mounting part. In this way, the two plate-shaped mounting parts are limited in the radial and axial directions.

[0059] Example 2

[0060] The working principle of this embodiment is basically the same as that of embodiment 1, except that the shape of the substrate 1 is different.

[0061] Specific implementation examples Figure 8 As shown, the base 1 is a non-circular tubular shape with a regular hexagonal cross-section, and the pin hole 17 on the object to be fixed is also a corresponding regular hexagon.

[0062] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A quick-release pin, comprising a tubular base (1), characterized in that, The base (1) is rotatably connected to a rotating column (2), the rotating column (2) is provided with a pin tongue (3), the base (1) is provided with a through hole (4) for the pin tongue (3) to extend radially, the pin tongue (3) is connected to an elastic structure (5) and has an elastic tendency to extend radially, the pin tongue (3) and the base (1) are provided with a retractable guide structure (6) driven by the relative rotation of the base (1) and the rotating column (2), and the base (1) is provided with a radially protruding limiting part (7).

2. The quick-release pin according to claim 1, characterized in that, The rotating column (2) has a radially extending pin groove (8) on its side wall. The pin (3) is slidably connected in the pin groove (8). The elastic structure (5) is disposed between the pin groove (8) and the pin (3).

3. The quick-release pin according to claim 2, characterized in that, The elastic structure (5) includes a spring (9), and a spring groove (10) is provided radially extending from the bottom of the pin tongue groove (8). The spring (9) is disposed in the spring groove (10), and its two ends are respectively connected to the bottom of the spring groove (10) and the bottom surface of the pin tongue (3).

4. The quick-release pin according to claim 1, characterized in that, The retraction guide structure (6) includes an outer guide slope (11) disposed at the front end of the pin tongue (3), and the outer guide slope (11) is inclined inward in the circumferential direction.

5. The quick-release pin according to claim 4, characterized in that, The outer guide slope (11) includes a slope bottom (12) and a slope top (13) distributed in the circumferential direction; the through hole (4) is provided with an inner guide slope (14) that is inclined in the circumferential direction on the side near the slope bottom (12), and the inner guide slope (14) is slidably connected to the outer guide slope (11). Alternatively, the via (4) extends radially to one side of the slope bottom (12), and the outer guide slope (11) is slidably connected to the inner periphery of the via (4).

6. The quick-release pin according to claim 4, characterized in that, The pin tongue (3) is provided with an anti-detachment part (15) on its side. The anti-detachment surface (16) of the anti-detachment part (15) abuts against the inner periphery of the through hole (4) and / or the inner sidewall of the base (1).

7. The quick-release pin according to claim 1, characterized in that, The cross-section of the substrate (1) is circular or regular hexagonal, and the pin hole (17) on the object to be fixed is a matching circular or regular hexagonal hole.

8. The quick-release pin according to any one of claims 1-7, characterized in that, The rotating column (2) has a radially extending limiting column (18) on its side, and a circumferentially extending limiting slot (19) is provided through the side wall of the base (1). The outer end of the limiting column (18) is limited in the limiting slot (19) but does not protrude from the outer side wall of the base (1). The rotating column (2) is provided with a limiting column mounting hole (20) on its side, and the limiting column (18) can be detachably fixed in the limiting column mounting hole (20).

9. The quick-release pin according to any one of claims 1-7, characterized in that, The limiting part (7) includes a limiting flange (21) that is provided on the upper end of the base (1) and protrudes radially; the upper end of the rotating column (2) is provided with a positioning flange (22) that protrudes radially, and the bottom surface of the positioning flange (22) is in contact with the top surface of the base (1).

10. The quick-release pin according to any one of claims 1-7, characterized in that, The substrate (1) is provided with a rotating column mounting hole (23) through the axial direction, and the inner diameter of the rotating column mounting hole (23) is adapted to the outer diameter of the rotating column (2); The base (1) and the rotating column (2) are both chamfered between the bottom surface and the outer surface; An operating part (24) is provided on the top surface of the rotating column (2).

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