Quick-release stop pin assembly

Abstract

The quick-release stop pin assembly comprises an adjusting knob, a blanking cap, a gasket, a stop gasket, a spring assembly, a pin rod, a pin body and a limiting stop pin, the pin body is provided with an axial through hole corresponding to the pin rod, a front mounting hole is formed in the front end of the pin body, a step surface is formed between the front mounting hole and the axial through hole, and the limiting stop pin is arranged in the step surface. A rear mounting hole is formed in the rear end of the pin body; the pin rod is installed in an axial through hole in the pin body, the adjusting knob penetrates through the blanking cap to be connected with the pin rod, and the limiting stop pin is connected with the pin rod through the rear installation hole. The gasket, the lock gasket and the spring assembly are sequentially arranged on the outer side of the pin rod located in the front installation hole in a sleeving mode. By the adoption of the assembly, the problem that steel balls of a traditional steel ball quick-release stop pin protrude and fall back and are prone to being clamped is effectively solved, the quality is more stable, and therefore connection is more reliable and more convenient, use requirements can be met, and the assembly is simple in overall structure, convenient to install and use, high in practicability and suitable for application and popularization.

Description

Technical Field

[0001] The invention relates to the technical field of connecting pieces, and in particular to a quick-release stop pin assembly. Background Art

[0002] The stop pin is a commonly used mechanical component, mainly used to prevent other parts from moving relative to each other. The stop pin is usually installed at the edge of parts that need to be disassembled frequently to help fix some parts. In a certain aircraft mechanical fastening connection, the commonly used quick-release stop pin is used. The pin rod will produce axial displacement, driving the steel ball to protrude, which does not play the role of limiting axial displacement. Its structure is as follows Figure 1 In the actual processing, the steel ball is fixed by local deformation of the pin body, but the deformation is difficult to control, resulting in inconsistent flexibility of the steel ball, which affects the ejection and fall of the steel ball and easily causes jamming.

[0003] Therefore, in order to effectively solve the problem that the steel ball is easily stuck when it protrudes and falls back, it is necessary to improve the existing stop pin structure, so as to provide a new quick-release stop pin assembly, and use a limit stop pin to replace the existing steel ball, which can effectively solve the problem that the steel ball is easily stuck when it protrudes and falls back, thereby making the connection more reliable and convenient, thereby meeting the use requirements. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the problems existing in the background technology. In order to meet the mechanical fastening connection requirements of a certain aircraft, an assembly with a simple structure and easy operation is provided. By using this assembly, a limit stop pin is used to replace the existing steel ball, which can effectively solve the problem of the steel ball protruding and falling back and easily getting stuck, thereby making the connection more reliable and convenient, thereby meeting the use requirements. Specifically, it is a quick-release stop pin assembly.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a quick-release stop pin assembly, including an adjusting knob, a plug cover, a washer, a stop washer, a spring assembly, a pin rod, a pin body and a limit stop pin, the pin body is provided with an axial through hole corresponding to the pin rod, a front mounting hole coaxially arranged with the axial through hole is provided at the front end of the pin body, a step surface is formed between the front mounting hole and the axial through hole, and a rear mounting hole vertically arranged with the axial through hole is provided at the rear end of the pin body; the pin rod is installed in the pin body through the axial through hole, the plug cover is sealed at the front end of the front mounting hole, the adjusting knob is connected with the pin rod extending into the front mounting hole through the plug cover, and the limit stop pin is connected with the pin rod through the rear mounting hole; the washer, the stop washer and the spring assembly are sequentially sleeved on the outside of the pin rod located in the front mounting hole, wherein the washer is connected with the adjusting knob, the front side surface of the stop washer is in contact with the washer, and the rear side surface is in contact with the step surface at the rear end of the front mounting hole through the spring assembly.

[0006] Furthermore, a quick-release stop pin assembly described in the present invention is adopted, the blocking cover is configured as a stepped shaft hole structure with a boss, the front mounting hole includes a first step hole, a second step hole and a third step hole which are coaxially arranged in sequence, the front mounting hole forms a stepped hole structure with three step surfaces through the first step hole, the second step hole and the third step hole, wherein the inner diameter of the first step hole is larger than the inner diameter of the second step hole, and the inner diameter of the second step hole is larger than the inner diameter of the third step hole, the blocking cover is installed in the first step hole, and its boss extends into the second step hole, and a mounting groove matching the stop washer is also provided on the inner wall of the third step hole, the stop washer is installed in the third step hole through the mounting groove, the adjusting knob passes through the blocking cover and is connected to the pin rod extending into the front mounting hole, and is connected to the washer arranged in the third step hole, the front end of the spring assembly is in abutment contact with the stop washer, and the rear end thereof is in abutment contact with the step surface at the third step hole.

[0007] Furthermore, a quick-release stop pin assembly described in the present invention is adopted, wherein a protrusion is provided at the front end of the adjusting knob, an inwardly recessed square connecting hole is provided in the protrusion, and a limiting slot is also provided in the protrusion; the washer is connected to the adjusting knob via the limiting slot, and a square connecting end corresponding to the square connecting hole is provided at the front end of the pin rod, and the pin rod is inserted into the square connecting hole in the adjusting knob via the square connecting end, thereby realizing the connection between the adjusting knob and the pin rod.

[0008] Furthermore, a quick-release stop pin assembly as described in the present invention is adopted, and two symmetrically arranged connecting pins are provided at the rear end of the pin rod, and the limit stop pin is composed of two stop pin bodies with an L-shaped structure, and a connecting pin hole corresponding to a connecting pin is provided in each stop pin body, and the two stop pin bodies are connected to the connecting pin in the pin rod through the corresponding connecting pin holes. When the pin rod rotates with the adjusting knob, the stop pin body in the limit stop pin is driven to rotate synchronously with the pin rod, so that the stop pin body extends outward from the rear mounting hole to the outside of the surface of the pin body, thereby playing a limiting role.

[0009] Furthermore, a quick-release stop pin assembly described in the present invention is adopted, wherein the washer and the stop washer are both arranged as a stepped shaft hole structure with a boss, and a limit block is provided on the side surface of the washer corresponding to the protrusion, and the washer is inserted into the limit slot through the limit block, so that the washer is connected to the adjusting knob; and a limit protrusion corresponding to the mounting groove is provided on the outer side surface of the stop washer along its circumference, and two limit protrusions are provided, and the two limit protrusions are symmetrically arranged on the outer side surface of the stop washer, and the stop washer is inserted into the mounting slot through the limit protrusion, and its rear end is abutted and contacted with the spring assembly installed in the third step hole; serrated surfaces are provided on the corresponding surfaces of the washer and the stop washer, and the washer and the stop washer can be meshed and connected through the serrated surface, and the washer is restricted to rotate synchronously with the adjusting knob through the stop washer, thereby playing a limiting role.

[0010] Furthermore, a quick-release stop pin assembly as described in the present invention is adopted, wherein the spring assembly includes an outer spring and an inner spring, wherein the outer spring and the inner spring both adopt compression springs of the same structure, and the inner spring and the outer spring are coaxially sleeved on the outside of the pin rod located in the front mounting hole, wherein the inner spring is located inside the outer spring, and the front ends of the inner spring and the outer spring are abutted and contacted with the stop washer, while the rear ends thereof are abutted and contacted with the step surface at the rear end of the front mounting hole.

[0011] Furthermore, using the quick-release stop pin assembly described in the present invention, an inwardly recessed straight groove or cross groove is provided on the rear end surface of the adjusting knob, and the straight groove or cross groove is arranged at the center position of the rear end surface of the adjusting knob.

[0012] The quick-release stop pin assembly described in the present invention uses a limit stop pin to replace the existing steel ball, compared with the existing quick-release stop pin, which can effectively solve the problem that the steel ball is prone to getting stuck when it protrudes and falls back, and the surfaces corresponding to the gasket and the stop gasket are provided with serrated surfaces, and the gasket and the stop gasket are meshed and connected through the serrated surface, which can play a role in fixing and limiting and preventing rotation, effectively solving the problem that the steel ball is prone to getting stuck, and is more convenient and quick during installation and use, and has a better stopping and anti-loosening effect. It can be seen that the assembly described in the present invention effectively solves the problem that the steel ball of the traditional steel ball quick-release stop pin is prone to getting stuck when it protrudes and falls back, and the quality is more stable, so that the connection is more reliable and convenient, and can meet the use requirements. Its overall structure is simple, easy to install and use, has high practicality, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of an existing quick-release stop pin; Figure 2 It is a schematic diagram of the structure of the present invention; Figure 3 is a schematic diagram of the structure of the adjusting knob of the present invention; Figure 4 is a top view of the adjustment knob of the present invention; Figure 5 It is a structural schematic diagram of the blocking cover in the present invention; Figure 6 is a top view of the plugging cover of the present invention; Figure 7 is a schematic diagram of a half-section structure of the gasket described in the present invention; Figure 8 is a schematic structural diagram of the gasket described in the present invention; Fig. 9 is a half section of the stop washer of the present invention; Fig.10 is a schematic structural diagram of the stop washer described in the present invention; Fig.11 is a schematic structural diagram of a spring in the spring assembly of the present invention; Fig.12 is a schematic structural diagram of a spring in the spring assembly of the present invention; Fig.13 It is a schematic structural diagram of the pin rod described in the present invention; Fig.14 yes Fig.13 Schematic diagram of the structure in the middle A direction; Fig.15 yes Fig.13 Schematic diagram of the structure in the middle B direction; Fig.16 It is a schematic diagram of the structure of the pin body of the present invention; Fig.17 It is a schematic diagram of the structure when the limit stop pin of the present invention is installed; Fig.18 It is a schematic diagram of the structure of the limit stop pin described in the present invention; Fig.19 It is a schematic diagram of the structural explosion of the present invention during assembly.

[0014] As shown in the figure: 1-adjusting knob, 11-protrusion, 12-square connecting hole, 2-blocking cover, 3-washer, 4-stop washer, 41-limiting protrusion, 5-spring assembly, 51-outer spring, 52-inner spring, 6-pin rod, 61-square connecting end, 62-connecting pin, 7-pin body, 71-axial through hole, 72-front mounting hole, 73-rear mounting hole, 74-step surface, 75-mounting groove, 8-limit stop pin, 81-connecting pin hole. DETAILED DESCRIPTION

[0015] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0016] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. Example 1

[0019] like Figures 2 to 18As shown, this embodiment provides a quick-release stop pin assembly, including an adjusting knob 1, a plug cover 2, a washer 3, a stop washer 4, a spring assembly 5, a pin rod 6, a pin body 7 and a limit stop pin 8, wherein the pin body 7 is provided with an axial through hole 71 corresponding to the pin rod 6, a front mounting hole 72 coaxially arranged with the axial through hole 71 is provided at the front end of the pin body 7, a step surface 74 is formed between the front mounting hole 72 and the axial through hole 71, and a rear mounting hole 73 perpendicularly arranged with the axial through hole 71 is provided at the rear end of the pin body 7; the pin rod 6 is mounted on the pin through the axial through hole 71 In the body 7, the blocking cover 2 is sealed at the front end of the front mounting hole 72, the adjusting knob 1 passes through the blocking cover 2 and is connected to the pin rod 6 extending into the front mounting hole 72, and the limit stop pin 8 is connected to the pin rod 6 through the rear mounting hole 73; the washer 3, the stop washer 4 and the spring assembly 5 are sequentially sleeved on the outside of the pin rod 6 located in the front mounting hole 72, wherein the washer 3 is connected to the adjusting knob 1, the front side surface of the stop washer 4 is in contact with the washer 3, and the rear side surface is in contact with the step surface 74 at the rear end of the front mounting hole 72 through the spring assembly 5. The plugging cover 2 is configured as a stepped shaft hole structure with a boss, and the front mounting hole 72 includes a first step hole, a second step hole and a third step hole which are coaxially arranged in sequence. The front mounting hole 72 forms a stepped hole structure with three step surfaces 74 through the first step hole, the second step hole and the third step hole, wherein the inner diameter of the first step hole is larger than the inner diameter of the second step hole, and the inner diameter of the second step hole is larger than the inner diameter of the third step hole. The plugging cover 2 is installed in the first step hole, and its boss extends into the second step hole, and a mounting groove 75 matching the stop washer 4 is also provided on the inner wall of the third step hole, and the stop washer 4 is installed in the third step hole through the mounting groove 75. The adjusting knob 1 passes through the plugging cover 2 and is connected to the pin rod 6 extending into the front mounting hole 72, and is connected to the washer 3 arranged in the third step hole. The front end of the spring assembly 5 is in abutment contact with the stop washer 4, and the rear end thereof is in abutment contact with the step surface 74 at the third step hole.

[0020] Furthermore, a quick-release stop pin assembly as described in this embodiment is adopted, wherein a protrusion 11 is provided at the front end of the adjusting knob 1, an inwardly recessed square connecting hole 12 is provided in the protrusion 11, and a limiting slot is also provided in the protrusion 11; the washer 3 is connected to the adjusting knob 1 through the limiting slot, and a square connecting end 61 corresponding to the square connecting hole 12 is provided at the front end of the pin rod 6, and the pin rod 6 is inserted into the square connecting hole 12 in the adjusting knob 1 through the square connecting end 61, thereby realizing the connection between the adjusting knob 1 and the pin rod 6. Two symmetrically arranged connecting pins 62 are provided at the rear end of the pin rod 6, and the limit stop pin 8 is composed of two stop pin bodies with an L-shaped structure, and a connecting pin hole 81 corresponding to the connecting pin 62 is provided in each stop pin body. The two stop pin bodies are connected to the connecting pin 62 in the pin rod 6 through the corresponding connecting pin holes 81. When the pin rod 6 rotates with the adjusting knob 1, the stop pin body in the limit stop pin 8 is driven to rotate synchronously with the pin rod 6, so that the stop pin body extends outward from the rear mounting hole 73 to the outside of the surface of the pin body 7, thereby playing a limiting role.

[0021] Furthermore, a quick-release stop pin assembly as described in this embodiment is adopted, wherein the washer 3 and the stop washer 4 are both configured as a stepped shaft hole structure with a boss, and a limiting block is provided on a side surface of the washer 3 corresponding to the protrusion 11, and the washer 3 is inserted into the limiting slot through the limiting block to achieve the connection between the washer 3 and the adjusting knob 1; and a limiting protrusion 41 corresponding to the mounting groove 75 is provided on the outer side surface of the stop washer 4 along its circumference, and the limiting protrusion 41 is provided with two, the two The limiting protrusions 41 are symmetrically arranged on the outer side of the stop washer 4, and the stop washer 4 is inserted into the installation groove 75 through the limiting protrusions 41, and its rear end is in contact with the spring assembly 5 installed in the third step hole; the corresponding surfaces of the washer 3 and the stop washer 4 are provided with serrated surfaces, and the washer 3 and the stop washer 4 can be meshed and connected through the serrated surface, and the stop washer 4 limits the washer 3 to rotate synchronously with the adjusting knob 1, thereby playing a limiting role.

[0022] Furthermore, a quick-release stop pin assembly as described in this embodiment is adopted, and the spring assembly 5 includes an outer spring 51 and an inner spring 52, and the outer spring 51 and the inner spring 52 are both compression springs with the same structure, and the inner spring 52 and the outer spring 51 are coaxially sleeved on the outside of the pin rod 6 located in the front mounting hole 72, wherein the inner spring 52 is located inside the outer spring 51, and the front ends of the inner spring 52 and the outer spring 51 are in abutment and contact connection with the stop washer 4, and the rear ends thereof are in abutment and contact connection with the step surface 74 at the rear end of the front mounting hole 72. Example 2

[0023] This embodiment is based on the embodiment 1. In order to facilitate operation and provide rotational power to the adjusting knob 1, the assembly described in this embodiment is used, and a slot or a cross slot that is recessed inward is further provided on the rear end surface of the adjusting knob 1. The slot or the cross slot is arranged at the center of the rear end surface of the adjusting knob 1. Through the slot or the cross slot, after the assembly is assembled, the product can be installed in the mounting hole, and other connecting parts can be inserted into the slot or the cross slot, thereby providing rotational power to the adjusting knob 1, thereby driving the pin 6 to rotate synchronously.

[0024] like Fig.19 As shown, in the specific application process, a quick-release stop pin assembly described in the present invention is used, and the end surface of the pin body 7 is sealed to fix the plug cover 2, thereby forming an integral structure. It is required that the limit stop pin 8 is consistent with the rod size of the pin body 7 when closed, and then the product is installed in the installation hole. When the quick-release stop pin is installed in place, the adjustment knob 1 is rotated 90° to drive the pin rod 6 to rotate synchronously, and the pin rod 6 drives the two stop pin bodies in the limit stop pin 8 to move up and down, so that the two stop pin bodies in the limit stop pin 8 protrude from the side of the pin body 7, which plays a limiting role.

[0025] In addition, since the corresponding surfaces of the washer 3 and the stop washer 4 are both provided with serrated surfaces, the washer 3 and the stop washer 4 can be meshed and connected via the serrated surfaces, which can play a role in fixing and limiting and preventing rotation. The stop washer 4 is inserted into the corresponding mounting grooves 75 through two limiting protrusions 41, and can be installed in the third step hole in the front mounting hole 72. When the washer 3 and the stop washer 4 are not meshed and connected, the washer 3 rotates synchronously with the adjusting knob 1. When the washer 3 and the stop washer 4 are meshed and connected, and under the action of the spring assembly 5, the elastic force of the spring assembly 5 can make the washer 3, the stop washer 4 and the adjusting knob 1 fully fit together, which can effectively eliminate the gap. The stop washer 4 is inserted into the mounting groove 75 through the limiting protrusion 41, and the mounting groove 75 can prevent the stop washer 4 installed in the front mounting hole 72 from rotating. Under the action of the spring assembly 5, the inner stop washer 4 can only move forward and backward along the axial direction of the front mounting hole 72, but cannot rotate. In this way, the rotation of the washer 3 can be limited by the stop washer 4, thereby achieving the purpose of limiting the rotation of the pin rod 6, thereby playing a limiting and stopping role. When using this product, during the screwing process, a warning sound of "clicking" will be produced, reminding that the product is in the screwing state, indicating that the washer 3 and the stop washer 4 are in a meshing connection state. When the best opening and closing position is reached, the clicking sound stops, indicating that the washer 3 and the stop washer 4 are only in contact and not meshing. Because the stop washer 4 and the washer 3 both have serrated surfaces, they cooperate with each other to play a role of limiting and locking. The entire assembly is different from the general quick-release stop pin with a steel ball structure. It not only has the function of a general quick-release stop pin, but also has a more reliable limit stop function, which can effectively ensure the quality of the product.

[0026] The quick-release stop pin assembly described in the present invention adopts a limit stop pin 8 to replace the existing steel ball compared with the existing quick-release stop pin, which can effectively solve the problem that the steel ball is easily stuck when it protrudes and falls back, and a serrated surface is provided on the corresponding surfaces of the washer 3 and the stop washer 4. The washer 3 and the stop washer 4 are meshed and connected by the serrated surface, which can play a role of fixing and preventing rotation, effectively solving the problem that the steel ball is easily stuck, and is more convenient and quick during installation and use, and has a better stopping and anti-loosening effect.

[0027] In summary, the use of the assembly described in the present invention effectively solves the problem of the traditional steel ball quick-release stop pin steel ball protruding and falling back and getting stuck, and the quality is more stable, making the connection more reliable and convenient, and can meet the use requirements. Its overall structure is simple, easy to install and use, has high practicality, and is suitable for promotion and application.

[0028] Other details of the present invention are conventional technologies known to those skilled in the art and are therefore not described in detail.

[0029] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the present invention and does not limit the present invention. Any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. A quick-release stop pin assembly, characterized in that: The invention comprises an adjusting knob (1), a plug cover (2), a washer (3), a stop washer (4), a spring assembly (5), a pin rod (6), a pin body (7) and a limit stop pin (8); the pin body (7) is provided with an axial through hole (71) corresponding to the pin rod (6); a front mounting hole (72) coaxially arranged with the axial through hole (71) is provided at the front end of the pin body (7); a step surface (74) is formed between the front mounting hole (72) and the axial through hole (71); and a rear mounting hole (73) perpendicularly arranged with the axial through hole (71) is provided at the rear end of the pin body (7); the pin rod (6) is installed in the pin body (7) through the axial through hole (71); the plug cover (2) The front end of the front mounting hole (72) is blocked, the adjusting knob (1) passes through the blocking cover (2) and is connected to the pin rod (6) extending into the front mounting hole (72), and the limit stop pin (8) is connected to the pin rod (6) through the rear mounting hole (73); the washer (3), the stop washer (4) and the spring assembly (5) are sequentially sleeved on the outside of the pin rod (6) located in the front mounting hole (72), wherein the washer (3) is connected to the adjusting knob (1), the front side surface of the stop washer (4) is in contact with the washer (3), and the rear side surface is in contact with the step surface (74) at the rear end of the front mounting hole (72) through the spring assembly (5).

2. A quick-release stop pin assembly according to claim 1, characterized in that: The plugging cover (2) is configured as a stepped shaft hole structure with a boss, the front mounting hole (72) comprises a first stepped hole, a second stepped hole and a third stepped hole which are coaxially arranged in sequence, the front mounting hole (72) forms a stepped hole structure with three stepped surfaces (74) through the first stepped hole, the second stepped hole and the third stepped hole, wherein the inner diameter of the first stepped hole is larger than the inner diameter of the second stepped hole, and the inner diameter of the second stepped hole is larger than the inner diameter of the third stepped hole, the plugging cover (2) is installed in the first stepped hole, and its boss extends to the second stepped hole. The third step hole is provided with a mounting groove (75) matching the stop washer (4) on the inner wall of the third step hole. The stop washer (4) is installed in the third step hole through the mounting groove (75). The adjusting knob (1) passes through the plug cover (2) and is connected to the pin rod (6) extending into the front mounting hole (72), and is connected to the washer (3) arranged in the third step hole. The front end of the spring assembly (5) is in contact with the stop washer (4), and the rear end thereof is in contact with the step surface (74) at the third step hole.

3. A quick-release stop pin assembly according to claim 2, characterized in that: A protruding portion (11) is provided at the front end of the adjusting knob (1), a square connecting hole (12) recessed inwardly is provided in the protruding portion (11), and a limiting slot is also provided in the protruding portion (11); the washer (3) is connected to the adjusting knob (1) via the limiting slot, and a square connecting end (61) corresponding to the square connecting hole (12) is provided at the front end of the pin rod (6); the pin rod (6) is inserted into the square connecting hole (12) in the adjusting knob (1) via the square connecting end (61), thereby achieving connection between the adjusting knob (1) and the pin rod (6).

4. A quick-release stop pin assembly according to claim 3, characterized in that: Two symmetrically arranged connecting pins (62) are provided at the rear end of the pin rod (6), and the limit stop pin (8) is composed of two stop pin bodies with an L-shaped structure, and a connecting pin hole (81) corresponding to the connecting pin (62) is provided in each stop pin body. The two stop pin bodies are connected to the connecting pin (62) in the pin rod (6) through the corresponding connecting pin holes (81). When the pin rod (6) rotates with the adjusting knob (1), the stop pin body in the limit stop pin (8) is driven to rotate synchronously with the pin rod (6), so that the stop pin body extends outward from the rear mounting hole (73) to the outer surface of the pin body (7), thereby playing a limiting role.

5. A quick-release stop pin assembly according to claim 3, characterized in that: The washer (3) and the stop washer (4) are both configured as stepped shaft hole structures with bosses; a limiting block is provided on a side surface of the washer (3) corresponding to the protruding portion (11); the washer (3) is inserted into the limiting slot through the limiting block, so that the washer (3) is connected to the adjusting knob (1); and a limiting protrusion (41) corresponding to the mounting groove (75) is provided on the outer side surface of the stop washer (4) along its circumference; two limiting protrusions (41) are provided, and the two limiting protrusions (41) are arranged in a symmetrical state. The stop washer (4) is placed on the outer surface of the stop washer (4), and the stop washer (4) is inserted into the installation groove (75) through the limiting protrusion (41), and its rear end is in contact with the spring assembly (5) installed in the third step hole; the corresponding surfaces of the washer (3) and the stop washer (4) are provided with a serrated surface, and the washer (3) and the stop washer (4) can be meshed and connected through the serrated surface, and the stop washer (4) limits the washer (3) to rotate synchronously with the adjusting knob (1), thereby playing a limiting role.

6. A quick-release stop pin assembly according to claim 5, characterized in that: The spring assembly (5) comprises an outer spring (51) and an inner spring (52), wherein the outer spring (51) and the inner spring (52) are both compression springs of the same structure, and the inner spring (52) and the outer spring (51) are coaxially sleeved on the outside of a pin rod (6) located in a front mounting hole (72), wherein the inner spring (52) is located inside the outer spring (51), and the front ends of the inner spring (52) and the outer spring (51) are in contact with a stop washer (4), and the rear ends thereof are in contact with a step surface (74) at the rear end of the front mounting hole (72).

7. A quick-release stop pin assembly according to claim 1, characterized in that: The rear end surface of the adjusting knob (1) is also provided with an inwardly recessed straight groove or a cross groove, and the straight groove or the cross groove is arranged at the center position of the rear end surface of the adjusting knob (1).

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