Single limb crossbow trigger mechanism

Abstract

This invention discloses a single-piece firing crossbow device, belonging to the field of firing crossbow technology. It includes a crossbow body, a gantry, a bowpiece support shaft, a main string, a secondary string, a buffer string, cylindrical head screws, semi-circular head screws, a pulley system, a bowpiece assembly, and a support assembly. The device employs a single bowpiece energy storage structure and includes a pulley system synchronization structure, a secondary string closed-loop winding structure, and a gantry buffer mechanism. By using a single bowpiece energy storage structure, combined with the pulley system's synchronous operation and the secondary string's closed-loop winding transmission, the tension values ​​on both sides of the main string can be kept consistent, effectively improving the accuracy of crossbow shooting. Simultaneously, it simplifies the overall structure, achieving lightweight and portability.

Description

Technical Field

[0001] This invention belongs to the field of crossbow technology, specifically a device for triggering a crossbow with a single bow limb. Background Technology

[0002] As a weapon combining practicality and sport, the energy storage structure and firing stability of the crossbow have always been key areas of optimization in the industry. Traditional crossbows, as sporting instruments with strong firing power, primarily rely on a bow limb assembly as their energy storage mechanism. The energy storage and release efficiency and maintainability of this bow limb assembly directly affect the crossbow's efficiency and lifespan. Most traditional crossbows employ a symmetrical double or multiple bow limb assembly structure. This symmetrical layout balances reaction forces, suppresses vibration, and improves firing stability. However, this structure significantly limits the overall size of the crossbow, hindering its lightweight and portable design.

[0003] Secondly, existing single-bow crossbows generally suffer from problems such as asynchronous pulley transmission, uneven tension on both sides of the main string, loud firing noise, and poor buffering effect. At the same time, the elastic potential energy of the bow pieces cannot be evenly transmitted, making it difficult to balance structural simplification, shooting accuracy, and operational stability. Summary of the Invention

[0004] The purpose of this invention is to provide a single bow slat triggering crossbow device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a single bow-blade firing crossbow device, comprising a crossbow body, a gantry, a bow-blade support shaft, a main string, a secondary string, a buffer string, a cylindrical head screw, a semi-circular head screw, a pulley block, a bow-blade assembly, and a support assembly. The device adopts a single bow-blade energy storage structure and is equipped with a pulley block synchronization structure, a secondary string closed loop winding structure, and a gantry buffer mechanism.

[0006] As a further preferred embodiment of this technical solution: the pulley block synchronization structure includes pulley A, guide wheel, pulley B, left auxiliary chord pulley, right auxiliary chord pulley, pulley shaft, synchronization pin, nut, set screw, countersunk screw, lug, and groove; the left auxiliary chord pulley and pulley A, and the right auxiliary chord pulley and pulley B are respectively fixed together by synchronization pin and countersunk screw; the synchronization pin passes through the hole on the pulley shaft and is inserted into the groove in the middle of pulley A, and is locked and positioned by set screw and nut.

[0007] As a further preferred embodiment of this technical solution: In the closed loop structure of the secondary string, the secondary string adopts a closed loop pattern, and both ends are connected to the guide wheel lugs. It passes through pulley A, left secondary string wheel, bow plate wheel, secondary string damping wheel one, and secondary string guide wheel in sequence, and then returns to the guide wheel lugs through the other side secondary string damping wheel one, bow plate wheel, right secondary string wheel, and pulley B, forming a closed loop path.

[0008] As a further preferred embodiment of this technical solution: in the gantry buffer mechanism, the gantry is provided with a gantry buffer string groove and a gantry main string groove; the two ends of the main string are hooked onto the lugs provided on the pulley A, and the middle part is coiled around the gantry main string grooves opened at both ends of the gantry; the two ends of the buffer string pass through the gantry and are inserted into the buffer string groove, and the middle part passes through the buffer slider; the gantry is fixed to the crossbow body by a semi-circular head screw and limited by a cylindrical head screw.

[0009] As a further preferred embodiment of this technical solution: the bow assembly consists of a bow support, a bow piece one, a bow piece pulley, a pulley shaft, and a semi-circular head screw two.

[0010] As a further preferred embodiment of this technical solution: the bracket assembly includes bracket one, long rod screw, secondary chord guide wheel, secondary chord damping wheel one, secondary chord damping wheel axle, buffer slider, buffer rubber, buffer wheel one, rotating frame, countersunk screw two, buffer wheel axle, and semi-circular head screw three.

[0011] As a further preferred embodiment of this technical solution: when the main string is excited, it strikes the gantry, the gantry rotates with a semi-circular head screw as the fulcrum, and the buffer string drives the buffer slider to slide and compress the buffer rubber.

[0012] As a further preferred embodiment of this technical solution: the pulley group is inserted into the bracket assembly as a whole, and pulley A and pulley B operate synchronously.

[0013] As a further preferred embodiment of this technical solution: the secondary chord guide wheel connects pulley A and pulley B into an integrated transmission system.

[0014] As a further preferred embodiment of this technical solution: the buffer rubber generates damping when compressed, which is used to limit the swing amplitude of the gantry.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, by adopting a single bow plate energy storage structure, combined with the synchronous operation of the pulley system and the closed-loop transmission of the secondary string, the tension values ​​on both sides of the main string can be kept consistent, effectively improving the accuracy of crossbow shooting, while simplifying the overall structure and achieving lightweight and portability.

[0017] 2. In this invention, the secondary string adopts a closed-loop path design, which can evenly transfer the elastic potential energy of the bow piece to both sides of the main string, allowing the elastic force of the single bow piece to be released stably, improving the energy storage efficiency utilization rate. At the same time, the structure is simple, maintenance is convenient, and the service life of the device is extended.

[0018] 3. In this invention, a contact-type compression buffer gantry buffer mechanism is adopted. When excited, the damping is generated by the compression of the buffer rubber, which can effectively limit the swing amplitude of the gantry. The traditional non-contact knocking noise reduction is replaced by contact buffer noise reduction, which significantly reduces the excitation noise and suppresses the vibration of the whole machine. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the crossbow body of a single bow-blade firing device according to the present invention;

[0020] Figure 2 This is a structural diagram of a support assembly for a single bow-blade-activated crossbow device according to the present invention;

[0021] Figure 3 This is a diagram of the bow assembly structure of a single bow limb triggering crossbow device according to the present invention;

[0022] Figure 4 This is a structural diagram of the pulley system of a single bow-blade-activated crossbow device according to the present invention;

[0023] Figure 5 Schematic diagram of the winding paths for the buffer string, secondary string, and primary string;

[0024] Figure 6 This is a schematic diagram of the winding paths for the buffer chord, secondary chord, and gantry.

[0025] Legend: 1. Crossbow body; 2. Frame; 3. Bow support shaft; 4. Main string; 5. Secondary string; 6. Buffer string; 7. Cylindrical head screw; 8. Semi-circular head screw; 9. Pulley system; 9.1 Pulley A; 9.2 Guide wheel; 9.3 Pulley B; 9.4 Left secondary string wheel; 9.5 Right secondary string wheel; 9.6 Pulley shaft; 9.7 Synchronizing pin; 9.8 Nut; 9.9 Set screw; 9.10 Countersunk screw; 9.11 Lug; 9.12 Groove; 10. Bow assembly; 10.1 Bow support; 10.2 Bow limbs. 10.3 Bow plate pulley; 10.4 Puller wheel axle; 10.5 Semi-circular head screw II; 11. Bracket assembly; 11.1 Bracket I; 11.2 Long rod screw; 11.3 Secondary chord guide wheel; 11.4 Secondary chord damping wheel I; 11.5 Secondary chord damping wheel axle; 11.6 Buffer slider; 11.7 Buffer rubber; 11.8 Buffer wheel I; 11.9 Turning frame; 11.10 Countersunk screw II; 11.11 Buffer wheel axle; 11.12 Semi-circular head screw III; 12. Gantry buffer chord groove; 13. Gantry main chord groove. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 invention 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 invention.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Example

[0030] Please see Figures 1-6 As shown, the present invention provides a technical solution: a single bow-blade firing crossbow device, including a crossbow body 1, a gantry 2, a bow-blade support shaft 3, a main string 4, a secondary string 5, a buffer string 6, a cylindrical head screw 7, a semi-circular head screw 8, a pulley block 9, a bow-blade assembly 10, and a support assembly 11. The device adopts a single bow-blade energy storage structure and is equipped with a pulley block synchronization structure, a secondary string closed loop winding structure, and a gantry buffer mechanism.

[0031] It should be noted that this device is based on the crossbow body 1 and adopts a single bow piece energy storage structure. It is equipped with a pulley block synchronization structure, a secondary string closed loop winding structure, and a gantry buffer mechanism to achieve a lightweight and portable layout, ensure consistent bow piece tension, and improve shooting accuracy.

[0032] In this embodiment, specifically: in the pulley block synchronization structure, the pulley block 9 includes pulley A9.1, guide wheel 9.2, pulley B9.3, left auxiliary chord pulley 9.4, right auxiliary chord pulley 9.5, pulley shaft 9.6, synchronization pin 9.7, nut 9.8, set screw 9.9, countersunk screw 9.10, lug 9.11, and groove 9.12; the left auxiliary chord pulley 9.4 and pulley A9.1, and the right auxiliary chord pulley 9.5 and pulley B9.3 are respectively fixed together by synchronization pin 9.7 and countersunk screw 9.10. The synchronization pin 9.7 passes through the hole on the pulley shaft 9.6 and is inserted into the groove 9.12 opened in the middle of pulley A9.1, and is locked and positioned by set screw 9.9 and nut 9.8.

[0033] In pulley block 9, the left auxiliary chord pulley 9.4 is fixed to pulley A9.1, and the right auxiliary chord pulley 9.5 is fixed to pulley B9.3 via a synchronizing pin 9.7 and a countersunk screw 9.10. The synchronizing pin 9.7 passes through the pulley shaft 9.6 and is inserted into the groove 9.12. It is locked and positioned by a set screw 9.9 and a nut 9.8 to eliminate transmission clearance, prevent parts from loosening, and ensure that pulley A9.1 and pulley B9.3 run synchronously.

[0034] In this embodiment, specifically: in the closed loop structure of the secondary string, the secondary string 5 adopts a closed loop pattern, and both ends are hooked to the guide wheel 9.2 lugs, and sequentially passes around pulley A9.1, left secondary string wheel 9.4, bow plate hanging wheel 10.3, secondary string damping wheel 11.4, secondary string guide wheel 11.3, and then passes through the other side secondary string damping wheel 11.4, bow plate hanging wheel 10.3, right secondary string wheel 9.5, pulley B9.3 and returns to the guide wheel 9.2 lug, forming a closed loop path.

[0035] It should also be understood that the secondary string 5 adopts a closed loop, with guide wheels 9.2 hanging lugs at both ends, and passes through pulley A9.1, left secondary string wheel 9.4, bow plate hanging wheel 10.3, secondary string damping wheel 11.4, and secondary string guide wheel 11.3 in sequence, and then returns to the starting point on the other side to form a closed loop, so as to evenly transfer the elastic potential energy of bow plate 10.2 to both sides of the main string 4, ensuring consistent force.

[0036] In this embodiment, specifically: in the gantry buffer mechanism, the gantry 2 is provided with a gantry buffer string groove 12 and a gantry main string groove 13; the two ends of the main string 4 are hooked onto the lugs 9.11 provided on the pulley A9.1, and the middle part is coiled around the gantry main string groove 13 opened at both ends of the gantry 2; the two ends of the buffer string 6 pass through the gantry 2 and are inserted into the buffer string groove 12, and the middle part passes through the buffer slider 11.6; the gantry 2 is fixed to the crossbow body 1 by a semi-circular head screw 8 and limited by a cylindrical head screw 7.

[0037] In addition, the gantry 2 has a buffer chord groove 12 and a main chord groove 13. The main chord 4 has a hook lug 9.11 and is coiled around the main chord groove 13. The buffer chord 6 is inserted into the buffer chord groove 12 and passes through the buffer slider 11.6. The gantry 2 is fixed by a semi-circular head screw 8 and limited by a cylindrical head screw 7, establishing the positioning basis for the main chord 4 and the buffer chord 6, and maintaining the structural stability in the hanging state.

[0038] In this embodiment, specifically: the bow assembly 10 consists of a bow bracket 10.1, a bow piece 10.2, a bow piece pulley 10.3, a pulley shaft 10.4, and a semi-circular head screw 10.5.

[0039] It should be noted that the bow plate assembly 10 consists of a bow plate bracket 10.1, bow plate one 10.2, bow plate hanging wheel 10.3, hanging wheel shaft 10.4, and semi-circular head screw two 10.5. It is a single elastic energy storage unit that provides stable energy storage, has a simple structure, is easy to maintain, and improves the efficiency and lifespan of the device.

[0040] In this embodiment, specifically: the bracket assembly 11 includes bracket one 11.1, long rod screw 11.2, secondary chord guide wheel 11.3, secondary chord damping wheel one 11.4, secondary chord damping wheel shaft 11.5, buffer slider 11.6, buffer rubber 11.7, buffer wheel one 11.8, rotating frame 11.9, countersunk screw two 11.10, buffer wheel shaft 11.11, and semi-circular head screw three 11.12.

[0041] The bracket assembly 11 includes bracket 11.1, long rod screw 11.2, secondary chord guide wheel 11.3, secondary chord damping wheel 11.4, secondary chord damping wheel axle 11.5, buffer slider 11.6, buffer rubber 11.7, buffer wheel 11.8, rotating frame 11.9, countersunk screw 2 11.10, buffer wheel axle 11.11, semi-circular head screw 3 11.12, supporting pulley block 9, guide secondary chord 5, providing buffer damping installation space, and ensuring the overall structure is stable.

[0042] In this embodiment, specifically: when the main string 4 is excited, it strikes the gantry 2, and the gantry 2 rotates with the semi-circular head screw 8 as the pivot point. The buffer string 6 drives the buffer slider 11.6 to slide and compress the buffer rubber 11.7.

[0043] It should also be understood that when the main string 4 is excited, it strikes the gantry 2. The gantry 2 rotates with the semi-circular head screw 8 as the fulcrum. The buffer string 6 drives the buffer slider 11.6 to slide and compress the buffer rubber 11.7, changing the traditional non-contact striking to contact compression buffering, thus reducing excitation noise.

[0044] In this embodiment, specifically: the pulley block 9 is inserted into the bracket assembly 11 as a whole, and pulley A9.1 and pulley B9.3 operate synchronously.

[0045] In addition, the pulley block 9 is inserted into the bracket assembly 11. Under the constraint of the synchronous pin 9.7, pulley A9.1 and pulley B9.3 operate synchronously to ensure that the tension values ​​of the main chord 4 are consistent on the left and right sides, thereby improving shooting accuracy.

[0046] In this embodiment, specifically: the secondary chord guide wheel 11.3 connects pulley A9.1 and pulley B9.3 into an integrated transmission system.

[0047] Among them, the secondary string guide wheel 11.3 connects pulley A9.1 and pulley B9.3 into an integrated transmission system, so that the elastic force of the single bow piece 10.2 is evenly distributed to both sides of the main string 4, realizing balanced force exertion of the single bow piece.

[0048] In this embodiment, specifically: the buffer rubber 11.7 generates damping when compressed, which is used to limit the swing amplitude of the gantry 2.

[0049] It should be noted that when the buffer rubber 11.7 is compressed, it generates sliding damping, which acts on the buffer slider 11.6 and the buffer string 6, limiting the swing amplitude of the gantry 2, absorbing the impact, and further reducing vibration and noise.

[0050] Working principle or structural principle: The crossbow bolts are stably fired and the noise is reduced by the coordinated operation of the pulley block synchronization structure, the secondary chord closed loop structure and the gantry buffer mechanism.

[0051] When the main string is in the strut position, the bow plate 10.2 in the bow plate assembly 10 undergoes elastic deformation to store energy; the secondary string 5 is tensioned along a preset closed-loop path, and guided by the secondary string guide wheel 11.3 and the secondary string damping wheel 11.4, the elastic potential energy of the bow plate 10.2 is evenly transferred to both sides of the pulley block 9. The pulleys A9.1 and B9.3 in the pulley block 9 maintain synchronous operation under the constraint of the synchronous pin 9.7 and the pulley shaft 9.6, so that the main string 4 is subjected to balanced forces on both sides.

[0052] When activated, the main string 4 breaks free from its constraint and releases energy, instantly striking the gantry 2. The gantry 2 rotates around the semi-circular head screw 8 as the pivot point, pulling the buffer string 6 and causing the buffer slider 11.6 to slide along the support assembly 11, compressing the buffer rubber 11.7. When the buffer rubber 11.7 is compressed, it generates sliding damping, limiting the swing amplitude of the gantry 2 and absorbing the impact energy.

[0053] The elastic potential energy of the bow piece 10.2 is smoothly released through the closed-loop transmission system of the secondary string 5, which propels the crossbow bolt out. During the entire firing process, the pulley block synchronization structure ensures the transmission accuracy, and the gantry buffer mechanism completes the impact buffering, realizing stable and low-noise firing under the single bow piece configuration.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A single bow-mounted crossbow device, comprising a crossbow body (1), a frame (2), a bow-mounted support shaft (3), a main string (4), a secondary string (5), a buffer string (6), a cylindrical head screw (7), a semi-circular head screw (8), a pulley system (9), a bow assembly (10), and a support assembly (11), characterized in that: The device employs a single bow plate energy storage structure and is equipped with a pulley block synchronization structure, a secondary chord closed loop structure, and a gantry buffer mechanism.

2. The single-piece bow-firing crossbow device according to claim 1, characterized in that: In the synchronous structure of the pulley group, the pulley group (9) includes pulley A (9.1), guide wheel (9.2), pulley B (9.3), left auxiliary chord pulley (9.4), right auxiliary chord pulley (9.5), pulley shaft (9.6), synchronous pin (9.7), nut (9.8), set screw (9.9), countersunk screw (9.10), lug (9.11), and groove (9.12). The left auxiliary chord pulley (9.4) and pulley A (9.1), and the right auxiliary chord pulley (9.5) and pulley B (9.3) are respectively fixed together by synchronous pin (9.7) and countersunk screw (9.10). The synchronous pin (9.7) passes through the hole on the pulley shaft (9.6) and is inserted into the groove (9.12) opened in the middle of pulley A (9.1), and is locked and positioned by set screw (9.9) and nut (9.8).

3. The single-piece bow-firing crossbow device according to claim 1, characterized in that: In the closed loop structure of the secondary string, the secondary string (5) adopts a closed loop pattern, and both ends are connected to the guide wheel (9.2) lugs. It passes through pulley A (9.1), left secondary string wheel (9.4), bow plate hanging wheel (10.3), secondary string damping wheel one (11.4), secondary string guide wheel (11.3) in sequence, and then passes through the other side secondary string damping wheel one (11.4), bow plate hanging wheel (10.3), right secondary string wheel (9.5), pulley B (9.3) back to the guide wheel (9.2) lug, forming a closed loop path.

4. The single-piece bow-firing crossbow device according to claim 1, characterized in that: In the gantry buffer mechanism, the gantry (2) is provided with a gantry buffer string groove (12) and a gantry main string groove (13); the two ends of the main string (4) are hooked on the lugs (9.11) provided on the pulley A (9.1), and the middle part is coiled around the gantry main string groove (13) opened at both ends of the gantry (2); the two ends of the buffer string (6) pass through the gantry (2) and are inserted into the buffer string groove (12), and the middle part passes through the buffer slider (11.6); the gantry (2) is fixed to the crossbow body (1) by a semi-circular head screw (8) and limited by a cylindrical head screw (7).

5. A single-piece bow-firing crossbow device according to claim 1, characterized in that: The bow assembly (10) consists of a bow bracket (10.1), bow piece one (10.2), bow piece pulley (10.3), pulley shaft (10.4), and semi-circular head screw two (10.5).

6. The single-piece bow-firing crossbow device according to claim 1, characterized in that: The bracket assembly (11) includes bracket one (11.1), long rod screw (11.2), secondary chord guide wheel (11.3), secondary chord damping wheel one (11.4), secondary chord damping wheel shaft (11.5), buffer slider (11.6), buffer rubber (11.7), buffer wheel one (11.8), rotating frame (11.9), countersunk screw two (11.10), buffer wheel shaft (11.11), and semi-circular head screw three (11.12).

7. A single-piece bow-firing crossbow device according to claim 4, characterized in that: When the main string (4) is activated, it strikes the gantry (2), and the gantry (2) rotates with the semi-circular head screw (8) as the pivot point. The buffer string (6) drives the buffer slider (11.6) to slide and compress the buffer rubber (11.7).

8. A single-piece bow-firing crossbow device according to claim 2, characterized in that: The pulley assembly (9) is inserted into the bracket assembly (11) as a whole, and the pulley A (9.1) and pulley B (9.3) operate synchronously.

9. A single-piece bow-firing crossbow device according to claim 3, characterized in that: The secondary chord guide wheel (11.3) connects pulley A (9.1) and pulley B (9.3) into an integrated transmission system.

10. A single-blade-firing crossbow device according to claim 7, characterized in that: The cushioning rubber (11.7) generates damping when compressed, which limits the swing amplitude of the gantry (2).

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