A female seat quick change mechanism

Abstract

The application belongs to the field of quick connection structure, and particularly relates to a female seat quick change mechanism, which comprises a body, a male plug and a rotating pin. The body forms positioning pin holes arranged in parallel and at intervals. The male plug forms positioning pin shafts capable of being inserted into the positioning pin holes. At least one side wall of the positioning pin shaft is provided with an arc-shaped clamping groove. The rotating pin is rotatably installed on the body and has a rotating center axis perpendicular to the positioning pin shaft. The rotating pin forms a first outer wall surface for clamping into the arc-shaped clamping groove and capable of limiting axial movement of the positioning pin shaft, and also forms a second outer wall surface for being opposite to the arc-shaped clamping groove so that the positioning pin shaft can move axially. The application can solve the technical problem of poor connection stability of the quick change mechanism in the prior art.

Description

Technical Field

[0001] This application belongs to the field of quick-connect structure, and particularly relates to a quick-change mechanism for a female seat. Background Technology

[0002] In automated stamping workshops, end effectors, as the end effectors of robots, need to be frequently replaced according to production tasks.

[0003] Traditional quick-change female connectors often use a single-hole barrel-type connection and are locked using a simple locking hook. This single-point locking results in low connection stability of the quick-change structure, making it prone to shaking under high-speed or high-load conditions, affecting positioning accuracy. Furthermore, the electrical connection of the transmission end effector is usually independent of the mechanical quick-change mechanism. When replacing the end effector, mechanical locking must be completed first, followed by manual plugging and unplugging of the electrical harness. This process is not only time-consuming and labor-intensive, increasing worker workload, but also prolongs production line downtime and reduces overall production efficiency.

[0004] Therefore, it is necessary to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this application is to provide a quick-change mechanism for the female seat to solve the technical problem of poor connection stability in the quick-change structure in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a quick-change mechanism for a female seat, comprising:

[0007] The body has parallel, spaced positioning pin holes;

[0008] The male plug forms a positioning pin that can be fitted into the positioning pin hole; at least one of the positioning pins has an arc-shaped groove on its side wall.

[0009] A rotating pin is rotatably mounted on the body with its rotation center axis perpendicular to the positioning pin shaft. The rotating pin has a first outer wall surface for engaging with the arc-shaped groove and restricting the axial movement of the positioning pin shaft, and a second outer wall surface for facing the arc-shaped groove to allow the positioning pin shaft to move axially.

[0010] Compared with the prior art, the beneficial effects of the quick-change mechanism for the female seat in this application are as follows:

[0011] This solution utilizes the combination of "parallel-spaced locating pin holes" and "locating pin shafts" to form a double-support over-positioning structure, fundamentally overcoming the weakness of single-point connections and providing strong resistance to eccentric loads and torsion. Simultaneously, by employing the specific combination of the "first outer wall surface" and "second outer wall surface" on the "rotating pin" with the "arc-shaped groove," reliable mechanical self-locking and precise axial limiting are achieved, ensuring extremely high stability in the connected state.

[0012] Optionally, the first outer wall surface and the second outer wall surface are connected end-to-end in the circumferential direction of the rotating pin. In this design, the first and second outer wall surfaces are connected end-to-end in the circumferential direction of the rotating pin, forming a continuous and complete cylindrical outer surface. This design allows the rotating pin to switch between the locked and unlocked states without interruption or jamming when the operator rotates the handle, avoiding motion interference that may be caused by discontinuous surfaces and further ensuring the connection stability of the quick-change mechanism.

[0013] Optionally, the second outer wall surface is bent into an arc-shaped notch that can accommodate the positioning pin. In this design, bending the second outer wall surface into an arc-shaped notch allows its contour to match the outer cylindrical surface of the positioning pin. Compared to a simple flat surface, this provides a larger and more optimized clearance area, making the positioning pin easier to insert and remove, and improving centering, thus further ensuring the connection stability of the quick-change mechanism.

[0014] Optionally, a first electrical plug is formed on the body, and a second electrical plug is formed on the male plug. The first and second electrical plugs are configured to form an electrical connection when the positioning pin is fully inserted into the positioning pin hole in a mechanical connection state, or to disconnect the electrical connection when the positioning pin is disengaged from the positioning pin hole in a mechanical separation state. In this solution, the insertion and insertion actions of the "first electrical plug" and the "second electrical plug" are structurally integrated with the mechanical insertion / disconnection action, so that the male plug and the body automatically connect the circuit when completing the mechanical connection, and automatically disconnect the circuit when disconnected. This eliminates the separate step of manually plugging and unplugging electrical wiring in the traditional method, simplifying the complex replacement process into a simple mechanical action, thereby significantly saving time and improving production efficiency.

[0015] Optionally, the main body is provided with a locking mechanism to restrict the rotation of the rotating pin. In this solution, providing a locking mechanism on the main body adds extra safety to the basic quick-change function. As an independent safety module, this locking mechanism can actively or manually fix the rotating pin in the locked position, effectively isolating it from the possibility of it rotating in the unlocking direction due to external vibration, equipment shaking, or accidental collision. This further ensures the connection stability of the quick-change mechanism.

[0016] Optionally, the locking mechanism includes a ratchet coaxially formed on the rotating pin, a pin rotatably mounted on the body, and a return spring connected to the pin for resetting the pin. Under the elastic force of the return spring, the pin engages with the ratchet and restricts the rotating pin from rotating in the unlocking direction. In this design, when the operator rotates the rotating pin to lock the male plug, the ratchet rotates simultaneously. During rotation, the teeth of the ratchet overcome the force of the return spring on the pin, pushing the pin up and sliding past the tooth tip until the rotating pin reaches the fully locked position. At this point, under the elastic restoring force of the return spring, the pin automatically falls and engages in the next tooth groove of the ratchet. This engagement creates a mechanical barrier, effectively preventing the rotating pin from rotating in the unlocking direction for any reason, thus achieving an automatic anti-reverse function, further ensuring the connection stability of the quick-change mechanism.

[0017] Optionally, the pin forms a connecting portion for connection with the body and an actuating portion connected to the connecting portion; the connecting portion and the actuating portion form mutually perpendicular extension structures, and the extension direction of the actuating portion is perpendicular to the rotation center axis of the pin. In this solution, by designing the pin as a mutually perpendicular extension structure of the "connecting portion" and the "actuating portion," a lever-like "T"-shaped mechanism is formed. This structure allows the force arm to be longer when the operator actuates the pin, thus overcoming the spring force of the return spring with less force, achieving labor-saving operation. At the same time, this structure also makes the installation and rotation of the pin on the body more stable, which can further ensure the connection stability of the quick-change mechanism.

[0018] Optionally, one end of the connecting part is connected to the center portion of the actuating part. In this design, by connecting the end of the connecting part to the center portion of the actuating part, the operating force can be evenly applied to both sides of the actuating part, avoiding uneven loading. This centrally symmetrical connection method ensures that the pin will not jam when rotating to unlock, making the operation smoother. It also enhances the overall structural rigidity and durability of the pin, further ensuring the connection stability of the quick-change mechanism.

[0019] Optionally, a through hole perpendicular to its own axis is formed on the rotating pin. The locking mechanism also includes a locking pin that can be detachably inserted into the through hole and a limiting boss formed on the body. The limiting boss interferes with the rotation path of the locking pin and is used to restrict the rotating pin from rotating to the unlocked state where it can be disengaged from the positioning pin hole. In this solution, by directly inserting the locking pin into the through hole on the rotating pin and physically interfering with the limiting boss, any possibility of rotation of the rotating pin is essentially eliminated. This is a purely mechanical, rigid locking mechanism that does not rely on elastic elements such as springs. Unlocking is only possible after the locking pin is manually pulled out, which helps to further ensure the connection stability of the quick-change mechanism.

[0020] Optionally, the locking mechanism further includes a rotary handle connected to the rotary pin. In this design, connecting the rotary handle to the rotary pin significantly increases the operating radius, thereby amplifying the operator's torque and making the rotation of the rotary pin easier. This not only reduces the operator's workload but also improves the connection stability of the entire quick-change mechanism. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the quick-change mechanism for the female seat in the embodiments of this application. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of the quick-change mechanism for the female seat in the embodiments of this application. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the overall structure of the quick-change mechanism for the female seat in the embodiments of this application;

[0025] Figure 4 This is a partial structural schematic diagram of the quick-change mechanism for the female seat in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the overall structure of the body in the embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the overall structure of the rotating pin in the embodiments of this application;

[0028] Figure 7 This is a schematic diagram of the overall structure of the pin in the embodiments of this application.

[0029] The following are the labeling elements in the figure:

[0030] 100. Body; 101. Locating pin hole; 102. Locating boss; 200. Male plug; 201. Locating pin shaft; 211. Arc-shaped groove; 300. Rotating pin; 301. First outer wall surface; 302. Second outer wall surface; 303. Arc-shaped notch; 304. Through hole; 401. First electrical plug; 402. Second electrical plug; 501. Ratchet; 502. Pin; 503. Return spring; 504. Locking pin; 505. Rotating handle; 521. Connecting part; 522. Actuating part. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] Please refer to the following: Figure 1 , Figure 2 and Figure 3 The following describes a quick-change mechanism for a female connector provided in an embodiment of this application. The quick-change mechanism includes a body 100, a male connector 200, and a rotating pin 300. Wherein:

[0036] The main body 100 is the fixed base of the mechanism, typically bolted to a robot arm or fixed base. It is made of high-strength cast iron or steel and has two parallel, spaced-apart locating pin holes 101 machined inside. These holes are high-precision and are used for precise mating with the male connector 200. The male connector 200 is the movable part of the mechanism, connecting to replaceable equipment such as aluminum tubing. It is fixed with locating pins 201 corresponding to the number and position of the locating pin holes 101. These locating pins 201 are also manufactured with high precision to ensure tight insertion. At least one of the locating pins 201 has an arc-shaped groove 211 machined on its side wall; the curvature of this groove can be flexibly designed during implementation. The rotating pin 300 is a rotatable shaft mounted on the main body 100 via bearings or bushings, its axis spatially perpendicular to the axis of the locating pins 201. The cylindrical surface of the rotating pin 300 is machined with a specific contour: the first outer wall surface 301 is usually the arc-shaped cylindrical surface of the rotating pin 300 itself, which is used to engage the arc-shaped groove 211 of the positioning pin 201 in the locked state; the second outer wall surface 302 can be a flat cut surface formed by cutting the cylindrical surface of the rotating pin 300, which is used to provide clearance space for the arc-shaped groove 211 on the positioning pin 201 in the unlocked state.

[0037] According to the structure provided in this embodiment, when connection is required, the positioning pin 201 on the male plug 200 is aligned with the positioning pin hole 101 on the body 100 and inserted. At this time, it is necessary to ensure that the second outer wall surface 302 (flat cut surface) of the rotating pin 300 is aligned with the arc-shaped groove 211 on the positioning pin 201 to provide a channel for insertion until the male plug 200 is fully in place. Subsequently, the positioning pin 201 is rotated at a certain angle so that its first outer wall surface 301 (arc-shaped cylindrical surface) rotates and engages with the arc-shaped groove 211 of the positioning pin 201. Because the arc-shaped contour of the first outer wall surface 301 contacts and interferes with the inner side of the groove, the movement of the positioning pin 201 is restricted axially, achieving a stable and reliable mechanical lock between the body 100 and the male plug 200. When disconnection is required, simply rotate the rotating pin 300 back to its original position so that its second outer wall surface 302 is aligned with the arc-shaped groove 211 again, and the male plug 200 can be smoothly pulled out. Throughout the process, the dual locating pin structure not only provides excellent bending and torsional resistance, but also ensures a stable and reliable connection between the male plug 200 and the body 100, which is far superior to existing technologies.

[0038] It is understood that, as a modified implementation of this embodiment, the number of positioning pins 201 and positioning pin holes 101 is not limited to two. For example, in cases where the load requirement is not high, only one positioning pin 201 with an arc-shaped groove 211 can be provided to cooperate with the rotating pin 300 for main locking, while the other is an optical axis for auxiliary positioning. Conversely, in cases where the stability requirement is extremely high, three or more positioning pins 201 can be provided, and arc-shaped grooves 211 can be opened on two or more of them, which are locked by the same or additional rotating pins 300, thereby further improving the connection stability. In addition, the specific shapes of the first outer wall surface 301 and the second outer wall surface 302 can also be varied. For example, the second outer wall surface 302 may not be an absolute plane, but a shallow arc-shaped concave surface with a larger radius of curvature, as long as it can provide sufficient clearance space; the first outer wall surface 301 may also be a partial protrusion or other non-complete cylindrical surface, as long as it can form an effective axial limit on the outer contour. These variations based on quantity, location, and local structure can all achieve the core function of this embodiment and, to varying degrees, contribute to improving the final effect of connection stability.

[0039] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 4 , Figure 5 and Figure 6 The first outer wall surface 301 and the second outer wall surface 302 are connected end to end in the circumferential direction of the rotating pin 300.

[0040] In this embodiment, the first outer wall surface 301 and the second outer wall surface 302 are adjacent to each other in the circumferential direction of the rotating pin 300, together forming a continuous, stepless, complete cylindrical outer contour. For example, the first outer wall surface 301 is the original cylindrical surface of the rotating pin 300, while the second outer wall surface 302 is a straight cut surface milled from this cylindrical surface. This cut surface smoothly connects to the cylindrical surfaces on both sides (i.e., the first outer wall surface 301), forming a "D"-shaped cross-section. This continuous design, with its end connected, allows the outer surface of the rotating pin 300 to smoothly transition from the first outer wall surface 301 to the second outer wall surface 302, or vice versa, when the operator rotates the rotating pin 300 using the handle. This not only improves the smoothness of operation but, more importantly, avoids the impact, jamming, or positioning uncertainty that may occur during the switching of discontinuous surfaces. This greatly enhances the reliability and repeatability of the mechanism's operation, ensuring the connection stability of the quick-change structure.

[0041] It is understood that, as a variation of this embodiment, the connection between the first outer wall surface 301 and the second outer wall surface 302 can be implemented in various ways. Besides the direct connection of a cylindrical surface and a tangential surface as described above, it can also be a smooth connection between two arcuate surfaces with different curvatures. For example, the second outer wall surface 302 is a shallow concave arcuate surface with a larger radius of curvature. However, as long as these two functional surfaces are connected end-to-end in the circumferential direction and transition continuously, rather than being separated by an additional, non-functional slot or surface, the core effect of smooth operation and avoiding jamming can be achieved.

[0042] In another embodiment of this application, please refer to Figure 6 The second outer wall surface 302 is bent into an arc-shaped notch 303 that can avoid the positioning pin 201.

[0043] In this embodiment, the second outer wall surface 302 is machined into an arc-shaped notch 303 that matches the outer cylindrical surface contour of the positioning pin 201. The radius of curvature of this arc-shaped notch 303 is typically equal to or slightly larger than the outer radius of the positioning pin 201, thus providing a more ample and shape-matched clearance space for the positioning pin 201 when the rotating pin 300 rotates to the unlocking angle. When the male plug 200 is inserted or removed, a near-conformal fit is formed between the outer cylindrical surface of the positioning pin 201 and the inner surface of the arc-shaped notch 303 of the rotating pin 300. This design greatly reduces the gap and interference between the two, making the axial movement of the positioning pin 201 extremely smooth and effectively avoiding jamming and wear of parts caused by edge scraping or local compression, thus further ensuring the connection stability of the quick-change mechanism. At the same time, this optimized guiding effect also reduces the stringent requirements on the manufacturing precision of parts and the coaxiality of assembly.

[0044] As a variation of this embodiment, the specific shape of the arc-shaped notch 303 can be adjusted as needed. For example, its radius of curvature can be designed to be slightly smaller than the radius of the positioning pin 201, creating a slight "clamping" effect and providing a certain damping feel in the unlocked state; or, its axial profile can be not a circular arc of equal radius, but rather an involute or other optimized curve to achieve a non-linear change in the clearance space during the rotation unlocking process, thereby optimizing the operating torque. In addition, the depth and range of the arc-shaped notch 303 can also be varied, and it can be a shallow and wide arc-shaped groove or a deep and narrow arc-shaped trench. These variations based on shape, curvature, and size are all aimed at improving the smoothness of insertion / extraction and reducing wear through a clearance structure that better fits the shape of the pin, and can all achieve the clearance effect superior to that of a flat cut surface in this embodiment.

[0045] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 4A first electrical plug 401 is formed on the body 100, and a second electrical plug 402 is formed on the male plug 200. The first electrical plug 401 and the second electrical plug 402 are configured to form an electrical connection when the positioning pin 201 is fully inserted into the positioning pin hole 101 in a mechanical connection state, or to disconnect the electrical connection when the positioning pin 201 is disengaged from the positioning pin hole 101 in a mechanical separation state.

[0046] In this embodiment, the first electrical plug 401 is an electrical connection part 521 fixedly mounted on the body 100, typically reliably connected to the body 100 via fasteners such as bolts. The second electrical plug 402 is correspondingly fixed to the male plug 200. The key feature of these two electrical plugs is that their spatial position and connection logic are tightly integrated with the mechanical quick-change mechanism. Specifically, the interface end face of the first electrical plug 401 faces the insertion direction of the male plug 200, and its installation depth and position are precisely calculated so that when the positioning pin 201 of the male plug 200 is fully inserted into the positioning pin hole 101 of the body 100, and the rotating pin 300 is rotated to the locked position, the spatial position of the male plug 200 relative to the body 100 is uniquely and precisely fixed. It is in this defined mechanical connection state that the second electrical plug 402 carried on the male plug 200 and the first electrical plug 401 on the body 100 also reach a perfectly mated physical position, thereby achieving reliable circuit connection. This configuration achieves a high degree of integration between mechanical and electrical connections. Operators only need to complete a simple "insert and rotate" mechanical operation to simultaneously achieve mechanical locking and electrical connection, eliminating the separate steps of finding, aligning, and manually plugging and unplugging electrical connectors. This greatly shortens operation time, simplifies the process, and fundamentally improves equipment replacement efficiency.

[0047] It is understood that, as a variation of this embodiment, the first electrical plug 401 and the second electrical plug 402 can be implemented in various ways. For example, they can be standard industrial connectors or customized contact blocks; their installation position can change from axial mating to radial lateral mating; the medium they transmit can be electricity, control signals, or data. However, regardless of their specific form, position, or function, as long as they follow the core configuration principle that "the mechanical connection state determines the electrical connection state," that is, the establishment and disconnection of the electrical connection are directly and synchronously driven by the mechanical mating and disassembly actions, they all fall within the scope of protection claimed in this application, and will not be elaborated further here.

[0048] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2The main body 100 is equipped with a locking mechanism to restrict the rotation of the rotating pin 300. In this embodiment, the locking mechanism is an independent functional module attached to the main body 100 and the rotating pin 300. Its core function is to apply additional constraints to the rotating pin 300, which is already in the locked state, to prevent it from rotating unexpectedly. This mechanism can be of various forms, such as mechanical or electromagnetic. After the mechanism is connected and the rotating pin 300 is rotated to the locked position, the locking mechanism is activated (automatically or manually). For example, a mechanical locking mechanism may use a pin inserted into a hole on the end face of the rotating pin 300, or a pawl engaged in the toothed groove on the outer periphery of the rotating pin 300, thereby physically blocking the path of rotation of the rotating pin 300. During the connection process, when the male plug 200 is inserted and the rotating pin 300 is rotated to the locked position, the operator immediately activates this locking mechanism. The mechanism then forms rigid interference with the rotating pin 300 or its associated components, eliminating the possibility that the rotating pin 300 may spontaneously loosen due to equipment vibration, external impact, or internal stress. During disconnection, this locking mechanism must be released first (e.g., by pulling out the pin or disengaging the pawl) before the rotating pin 300 can be rotated normally to unlock the male plug 200. This secondary locking mechanism greatly enhances the reliability and safety of the entire quick-change mechanism under complex operating conditions.

[0049] It is understood that, as a modified implementation of this embodiment, the specific implementation, installation position, and actuation method of the locking mechanism can vary in many ways. Its type is not limited to mechanical pin 502 or ratchet 501 pawl; it can also be a slider with spring self-locking, an electromagnetically driven locking tongue, etc. Its installation position can directly act on the body 100 of the rotating pin 300, or it can act on other components that rotate synchronously with the rotating pin 300. Its actuation method can be purely manual operation, or it can be semi-automatic or fully automatic control via pneumatic, electric, or electromagnetic drives.

[0050] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 4 and Figure 6 The locking mechanism includes a ratchet 501 coaxially formed on the rotating pin 300, a pin 502 rotatably mounted on the body 100, and a return spring 503 connected to the pin 502 and used to reset the pin 502; the pin 502 engages with the ratchet 501 under the elastic force of the return spring 503 and can restrict the rotating pin 300 from rotating in the unlocking direction.

[0051] In this embodiment, the ratchet 501 is a unidirectional toothed part coaxially fixed to or integrally formed with the rotating pin 300. Its teeth do not need to cover the entire circumference; typically, they only need to cover the effective travel near the locked state. The pin 502 is a rod-shaped part rotatably mounted on the body 100, one end of which is formed with a pawl or tip that matches the teeth of the ratchet 501. The return spring 503 is typically a torsion spring or compression spring, and its function is to apply a continuous elastic force to the pin 502, forcing the pawl end of the pin 502 to always maintain a tendency to move towards the ratchet 501. When the operator rotates the rotating pin 300 forward (i.e., in the locking direction), the teeth of the ratchet 501 press against the pawl of the latch 502, forcing the latch 502 to lift (rotate) against the force of the return spring 503, allowing the ratchet 501 teeth to slide past. This process is accompanied by a clear "click" sound. Once the rotating pin 300 passes the target locking position, the latch 502 will quickly fall back under the drive of the return spring 503 and lock into the next ratchet 501 tooth slot. At this time, if the rotating pin 300 attempts to rotate in the reverse direction (i.e., in the unlocking direction) due to vibration or other reasons, the pawl of the latch 502 will immediately form a rigid abutment against the vertical anti-reverse surface of the ratchet 501 teeth, thus reliably preventing any reverse movement and achieving one-way self-locking. This design, by automatically entering the anti-reverse state during the locking process without additional operating steps, greatly enhances the mechanism's resistance to vibration and accidental loosening, and improves the connection stability of the quick-change mechanism.

[0052] It is understood that, as a variation of this embodiment, the specific structures of the ratchet 501 and the pin 502 can vary. For example, the teeth of the ratchet 501 can be rectangular, sawtooth, or arc-shaped; the engagement method between the pin 502 and the ratchet 501 can be top engagement, side engagement, or hook engagement; the type and installation position of the return spring 503 can also be different, such as a torsion spring being sleeved on the pivot of the pin 502, or a compression spring acting on the tail of the pin 502. Furthermore, the ratchet 501 can be positioned on the axial end face or the radial outer cylindrical surface of the rotating pin 300.

[0053] In another embodiment of this application, please refer to Figure 7 The pin 502 forms a connecting portion 521 for connecting with the body 100 and an actuating portion 522 connected to the connecting portion 521; the connecting portion 521 and the actuating portion 522 form mutually perpendicular extension structures and the extension direction of the actuating portion 522 is perpendicular to the rotation center axis of the pin 502.

[0054] In this embodiment, the pin 502 is specifically designed as a lever component with a specific geometry. Its connecting portion 521 is a shaft-like structure rotatably mounted on the body 100 via a pin or bearing hole, forming the rotation center of the pin 502. The actuating portion 522 is an arm-like structure fixedly connected to the connecting portion 521 (usually integrally formed) and extending outwards. Its extension direction is perpendicular to the axial direction of the connecting portion 521, and the extension direction of this arm is also perpendicular to the rotation center axis of the pin 502 as a whole. This "mutually perpendicular extension structure" makes the pin 502 form a lever resembling the letter "T" or "L". When unlocking is required, disengaging the pin 502 from the ratchet 501, the operator only needs to apply a small force to the end of the actuating portion 522. Because the lever arm is significantly lengthened, according to the lever principle, this operating force can generate a sufficiently large torque at the rotation center of the connecting part 521, thereby easily and reliably overcoming the elastic force of the return spring 503 and lifting the pawl end of the pin 502 from the tooth groove of the ratchet 501. This design not only makes the unlocking operation very effortless, but more importantly, the pin 502 can be designed to form a more stable engagement with the ratchet 501, which also helps to further improve the connection stability of the quick-change mechanism.

[0055] It is understood that, as a variation of this embodiment, the specific shape and relative position of the connecting part 521 and the actuating part 522 can vary in many ways. For example, the actuating part 522 can be a straight rod (standard "T" shape) symmetrically connected to the midpoint of the connecting part 521, or it can be a bent rod ("L" shape or crank shape) asymmetrically connected to one end; the actuating part 522 itself can be a straight rod, or it can be a structure with a multifunctional hook-shaped or hole-shaped end to facilitate operation or realize other auxiliary functions.

[0056] In another embodiment of this application, please refer to Figure 7 One end of the connecting part 521 is connected to the center part of the actuating part 522.

[0057] In this embodiment, the specific connection relationship between the connecting part 521 and the actuating part 522 is further defined as follows: one end of the connecting part 521 is fixedly connected to the central region of the actuating part 522 along its length. This "T"-shaped structure with the connection point at the center allows the operating force to be evenly distributed on both sides of the center line of the actuating part 522. When the operator applies force to either end of the actuating part 522 to overcome the force of the return spring 503 and lift the pin 502, the force is transmitted to the connecting part 521 through the central connection point, and the resulting torque does not cause the actuating part 522 itself to twist or deflect. This symmetrical force design ensures that the pawl end of the pin 502 can be smoothly and vertically lifted from the tooth groove of the ratchet 501 during the rotation unlocking process, avoiding problems such as jamming, wear, or uneven operation caused by asymmetrical force. This not only makes the operating feel more stable and reliable, but also reduces abnormal wear between components, thereby further improving the durability and operational consistency of the entire quick-change mechanism under long-term frequent use, and enhancing the reliability of the safety locking.

[0058] It is understood that, as a modified implementation of this embodiment, the specific implementation of the central connection between the connecting part 521 and the actuating part 522 can vary slightly. For example, the connecting part 521 can be welded, threaded, or integrally cast with the actuating part 522; the connection point between the connecting part 521 and the actuating part 522 can be precisely located at the geometric center of the actuating part 522, or it can be offset within a small area of ​​its length direction center, as long as it basically ensures the symmetry of the force; the actuating part 522 itself can be a straight rod with a uniform cross-section, or it can be a variable cross-section rod that is appropriately thickened at the central connecting part 521 to enhance strength.

[0059] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 4 and Figure 6 A through hole 304 perpendicular to its own axis is formed on the rotating pin 300. The locking mechanism also includes a locking pin 504 that can be detachably inserted into the through hole 304 and a limiting boss formed on the body 100. The limiting boss interferes with the rotation path of the locking pin 504 and is used to limit the rotating pin 300 to the unlocked state that can be disengaged from the positioning pin hole 101.

[0060] In this embodiment, the through hole 304 is a through hole penetrating both sides of the rotating pin 300, with its axis perpendicular to the central axis of the rotating pin 300. The locking pin 504 is a separate, completely removable rod-shaped part, such as a cotter pin, safety pin, or special pin 502. The limiting boss is a rigid protrusion structure fixed to the body 100. The locking mechanism operates on the principle of purely mechanical hard interference: when the rotating pin 300 rotates to a reliable locking position, its through hole 304 aligns spatially with the limiting boss. At this time, the operator inserts the locking pin 504 into the through hole 304 of the rotating pin 300. Once the locking pin 504 is inserted, part of its rod will inevitably be within the expected rotation path of the limiting boss. At this time, if the rotating pin 300 has any tendency to rotate in the unlocking direction, the rod of the locking pin 504 will immediately collide with the side of the limiting boss, forming an insurmountable mechanical blockage. This physical interference eliminates any possibility of accidental rotation of the rotating pin 300 at its source, providing the highest level of safety. Its effect is that it does not rely on the reliability of any elastic element; the locking can only be released through human intervention, i.e., actively pulling out the locking pin 504. This also helps to further improve the connection stability of the quick-change mechanism.

[0061] It is understood that, as a modified implementation of this embodiment, the specific implementation of the through hole 304, the locking pin 504, and the limiting boss can vary in many ways. For example, the through hole 304 can be a simple smooth hole or an irregularly shaped hole with a locking groove; the locking pin 504 can be a standard cotter pin or a special safety pin with a spring button or locking ring to prevent it from falling off on its own; the limiting boss can be a protrusion integrally formed with the body 100 or an additionally installed metal stop. In addition, the axial position of the through hole 304 on the rotating pin 300 can be varied, and the interference fit between the locking pin 504 and the limiting boss can be either side abutment or top blocking.

[0062] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 4 The locking mechanism also includes a rotating handle 505 connected to the rotating pin 300.

[0063] In this embodiment, the rotating handle 505 is an operating component rigidly connected to the outer end of the rotating pin 300, and its extension direction is perpendicular to the axis of the rotating pin 300, forming a lever structure. The rotating handle 505 is reliably connected to the rotating pin 300 through threads, keyways, or press fittings, converting the force applied by the operator to the end of the handle into torque to drive the rotating pin 300 to rotate. Since the length of the handle is significantly greater than the radius of the rotating pin 300, according to the lever principle, the operator only needs to apply a small force to generate sufficient torque to drive the rotating pin 300 under high load, switching it between the locked and unlocked states. This design makes the operation of the quick-change mechanism labor-saving and efficient. During connection, the operator can rotate the rotating pin 300 to the locked position by turning the handle in one direction; during disconnection, turning the handle in the opposite direction unlocks it. Through the lever arm amplification effect provided by the handle, not only is the operational intensity significantly reduced, but the entire locking and unlocking action can also be completed quickly and accurately, directly improving the ease of operation and connection stability of the quick-change mechanism.

[0064] It is understood that, as a variation of this embodiment, the specific implementation of the rotating handle 505 can vary. For example, the handle can be a straight rod, a curved handle, or a star-shaped handle; its connection point with the rotating pin 300 can be the axial end face or the radial side; the handle can be made of metal, engineering plastic, or a composite material coated with an anti-slip layer. Furthermore, the length and structure of the handle can be optimized according to the actual operating space and required torque, such as using a folding handle to save space or a detachable handle to improve safety.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quick-change mechanism for a female seat, characterized in that, include: The body has parallel, spaced positioning pin holes; The male plug forms a positioning pin that can be fitted into the positioning pin hole; at least one of the positioning pins has an arc-shaped groove on its side wall. A rotating pin is rotatably mounted on the body with its rotation center axis perpendicular to the positioning pin shaft. The rotating pin has a first outer wall surface for engaging with the arc-shaped groove and restricting the axial movement of the positioning pin shaft, and a second outer wall surface for facing the arc-shaped groove to allow the positioning pin shaft to move axially.

2. The quick-change mechanism for the female seat as described in claim 1, characterized in that: The first outer wall surface and the second outer wall surface are connected end to end in the circumferential direction of the rotating pin.

3. The quick-change mechanism for the female seat as described in claim 2, characterized in that: The second outer wall surface is bent into an arc-shaped notch that can avoid the positioning pin.

4. The quick-change mechanism for the female seat as described in claim 1, characterized in that: A first electrical plug is formed on the main body, and a second electrical plug is formed on the male plug. The first electrical plug and the second electrical plug are configured to form an electrical connection when the locating pin is fully inserted into the locating pin hole in a mechanical connection state, or to disconnect the electrical connection when the locating pin is disengaged from the locating pin hole in a mechanical separation state.

5. The quick-change mechanism for the female seat as described in any one of claims 1-4, characterized in that: The main body is provided with a locking mechanism for restricting the rotation of the rotating pin.

6. The quick-change mechanism for the female seat as described in claim 5, characterized in that: The locking mechanism includes a ratchet section coaxially formed on the rotating pin, a pin rotatably disposed on the body, and a return spring connected to the pin and used to reset the pin. The pin engages with the ratchet under the elastic force of the return spring, thus restricting the rotating pin from rotating in the unlocking direction.

7. The quick-change mechanism for the female seat as described in claim 6, characterized in that: The pin forms a connecting portion for connecting with the body and a toggle portion connected to the connecting portion; The connecting part and the actuating part form a mutually perpendicular extension structure, and the extension direction of the actuating part is perpendicular to the rotation center axis of the pin.

8. The quick-change mechanism for the female seat as described in claim 7, characterized in that: One end of the connecting part is connected to the center part of the actuating part.

9. The quick-change mechanism for the female seat as described in claim 5, characterized in that: The rotating pin has a through hole perpendicular to its own axis, and the locking mechanism also includes a locking pin that can be detachably inserted into the through hole and a limiting boss formed on the body. The limiting boss interferes with the rotation path of the locking pin and is used to restrict the rotation of the rotating pin to the unlocked state, which allows it to disengage from the positioning pin hole.

10. The quick-change mechanism for the female seat as described in claim 5, characterized in that: The locking mechanism also includes a rotating handle connected to the rotating pin.

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