A new string winding crossbow head device

Abstract

This invention discloses a novel string-wound crossbow head device, belonging to the field of string-wound crossbow technology. It includes a crossbow head, an arc-shaped support plate, a crossbow shard pressing block, a front crossbow shard, a rear crossbow shard, a bow shard bracket, a buffer wheel axle assembly, a pulley assembly, a main string, a secondary string, M4 semi-circular head screws, M6 cylindrical head screws, M5 cylindrical head screws, hooks, lugs, an arc-shaped support plate with a crossbow shard fixing pin, a crossbow shard positioning pin, a crossbow shard with a positioning pin hole, a crossbow shard pressing plate, and a crossbow shard locking screw. In this invention, a straight crossbow shard of uniform thickness is used instead of the traditional variable crossbow shard with a thin front and thick rear. When the trigger is deformed, the elastic curve of the crossbow shard is constrained by the curved surface contour of the arc-shaped support plate, forcibly limiting the deformation curvature and effectively avoiding stress concentration at the root. This fundamentally solves the problem of root breakage and middle delamination that is common in traditional crossbow shards, significantly improving the durability and long-term safety of the crossbow shard, reducing the probability of failure, and extending the overall service life.

Description

Technical Field

[0001] This invention belongs to the field of wire-wound crossbow technology, specifically a novel wire-wound crossbow head device. Background Technology

[0002] As a traditional shooting weapon, the crossbow is widely used in sports and other fields due to its strong firing force and long range. The energy storage core of existing crossbows is the crossbow limb. Traditional crossbow limbs generally adopt a variable cross-section structure with a thin front end and a thick rear end. The energy storage due to deformation is concentrated only in the front end area, and the deformation participation of the rear end is low, which limits the overall energy storage efficiency. At the same time, the deformation of the crossbow limb depends entirely on the curvature determined by its own cross-sectional characteristics, without external surface constraints. With long-term use, it is prone to problems such as stress concentration and breakage at the root, as well as delamination and peeling in the middle, which seriously affect the service life and safety of use.

[0003] In addition, the traditional crossbow string connection method is simple, mostly with a single front end pull, which makes it difficult to achieve synchronous deformation of the front and rear ends of the crossbow limbs, resulting in uneven energy transfer and making it difficult to further improve arrow speed and stability. Summary of the Invention

[0004] The purpose of this invention is to provide a novel string-wound crossbow head 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 novel string-wound crossbow head device, comprising a crossbow head, an arc-shaped support plate, a crossbow shard pressing block, a front crossbow shard, a rear crossbow shard, a bow shard bracket, a buffer wheel axle assembly, a pulley assembly, a main string, a secondary string, M4 semi-circular head screws, M6 cylindrical head screws, M5 cylindrical head screws, hooks, lugs, an arc-shaped support plate with a crossbow shard fixing pin, a crossbow shard positioning pin, a crossbow shard with a positioning pin hole, a crossbow shard pressing plate, and a crossbow shard locking screw. The front crossbow shard and the rear crossbow shard are both straight pieces of equal cross-sectional thickness and are fixed to the arc-shaped support plate by the crossbow shard pressing block and M6 cylindrical head screws. The main string and the secondary string, together with the pulley assembly, form a closed-loop connection, and when the crossbow is engaged, the front crossbow shard and the rear crossbow shard deform synchronously to store energy, and the energy is released by the main string to fire the crossbow bolt.

[0006] As a further preferred embodiment of this technical solution: the secondary string is provided with lugs at both ends, one lug is attached to the hook of the bow support, and the other lug passes around the pulley assembly and connects to the end of the crossbow blade, so as to realize the suspension connection of the two ends of the secondary string.

[0007] As a further preferred embodiment of this technical solution: when the front and rear crossbow pieces deform, the elastic deformation curves are constrained by the curved surface contour of the arc-shaped support plate, which is used to prevent the root of the crossbow piece from breaking.

[0008] As a further preferred embodiment of this technical solution: the pulley assembly is installed on the upper part of the bow support to guide the winding of the main string and secondary string and reduce frictional resistance.

[0009] As a further preferred embodiment of this technical solution: the buffer wheel axle assembly is located in the middle of the crossbow head and is used for buffering and limiting the stroke during the string pulling process.

[0010] As a further preferred embodiment of this technical solution: the crossbow limb adopts a positioning pin fixing structure, wherein the crossbow limb positioning pin is fixed on the arc-shaped support plate with the crossbow limb fixing pin shaft.

[0011] As a further preferred embodiment of this technical solution: the crossbow piece with the positioning pin hole is aligned with the crossbow piece positioning pin through the pin hole, and then locked and fixed by the crossbow piece pressure plate and the crossbow piece locking screw.

[0012] As a further preferred embodiment of this technical solution: the main string and the secondary string together connect the front crossbow piece and the rear crossbow piece into a whole, and the deformation potential energy of both is uniformly released by the main string.

[0013] As a further preferred embodiment of this technical solution: the M4 semi-circular head screw and the M5 cylindrical head screw are used for the assembly and fastening of the crossbow head and the buffer wheel shaft assembly, respectively.

[0014] As a further preferred embodiment of this technical solution: the curved surface profile of the arc-shaped support plate with the crossbow piece fixing pin is consistent with the curved surface profile of the arc-shaped support plate, and the crossbow piece conforms to the corresponding curved surface for limiting when it deforms.

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

[0016] 1. In this invention, by using a straight piece of uniform cross-section thickness as the crossbow piece, instead of the traditional crossbow piece with a thin front end and a thick rear end, the elastic curve of the crossbow piece is constrained by the curved surface profile of the arc support plate when the trigger is deformed, which forcibly limits the deformation curvature and effectively avoids stress concentration at the root. This fundamentally solves the problem that traditional crossbow pieces are prone to root breakage and middle delamination, greatly improves the durability and long-term safety of the crossbow piece, reduces the probability of failure, and extends the overall service life.

[0017] 2. In this invention, the main string and secondary string are connected in a closed loop with the pulley assembly to link the front and rear ends of the crossbow into one unit. When the crossbow is engaged, the front and rear crossbows deform and store energy synchronously. This is different from the traditional method of only deforming and storing energy at the front end. The energy storage is more complete and the force is more balanced. When the crossbow is fired, the deformation potential energy is released uniformly by the main string. The power transmission is direct and the loss is small, which significantly improves the arrow speed and range, and enhances the firing stability and the impact effect.

[0018] 3. Two types of crossbow limb fixing methods are provided: one is to press and fix the crossbow limb with a crossbow limb clamping block, and the other is to use a positioning pin for precise alignment and locking. Both methods can ensure that the crossbow fits the curved surface of the support plate and the deformation trajectory is consistent, which can be adapted to different assembly scenarios and has strong versatility. At the same time, disassembly and maintenance are simple, the parts are firmly positioned and not easy to loosen, the whole machine structure is stable and the operation is reliable, reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a front view of the crossbow head without being engaged, according to the present invention, a novel string-wound crossbow head device;

[0020] Figure 2 This is an isometric view of the crossbow head without being engaged, according to the present invention, a novel string-wound crossbow head device;

[0021] Figure 3 This is a view showing the deformation of the crossbow limb in the firing state of a novel wire-wound crossbow head device according to the present invention;

[0022] Figure 4 This is a schematic diagram of the main and secondary string winding paths of a novel crossbow head device of the present invention in the state of the crossbow head not being engaged.

[0023] Figure 5 This invention relates to a novel string-wound crossbow head device and its overall fixing method for the crossbow limb;

[0024] Figure 6 This is a cross-sectional view of the fixed form of the entire crossbow blade of a novel string-wound crossbow head device according to the present invention.

[0025] Legend: 1. Crossbow head; 2. Arc-shaped support plate; 3. Crossbow limb clamping block; 4. Front crossbow limb; 5. Rear crossbow limb; 6. Crossbow limb bracket; 7. Buffer wheel axle assembly; 8. Pulley assembly; 9. Main string; 10. Secondary string; 11. M4 semi-circular head screw; 12. M6 cylindrical head screw; 13. M5 cylindrical head screw; 14. Hook; 15. Hanging lug; 20. Arc-shaped support plate with crossbow limb fixing pin; 21. Crossbow limb positioning pin; 22. Crossbow limb with positioning pin hole; 23. Crossbow limb clamping plate; 24. Crossbow limb locking screw. 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 novel string-wound crossbow head device, comprising a crossbow head 1, an arc-shaped support plate 2, a crossbow piece pressure block 3, a front crossbow piece 4, a rear crossbow piece 5, a crossbow piece bracket 6, a buffer wheel axle assembly 7, a pulley assembly 8, a main string 9, a secondary string 10, an M4 semi-circular head screw 11, an M6 cylindrical head screw 12, an M5 cylindrical head screw 13, a hook 14, a hanging ear 15, an arc-shaped support plate 20 with a crossbow piece fixing pin, a crossbow piece positioning pin 21, a crossbow piece 22 with a positioning pin hole, a crossbow piece pressure plate 23, and a crossbow piece locking screw 24. The front crossbow piece 4 and the rear crossbow piece 5 are both straight pieces of equal cross-sectional thickness and are fixed to the arc-shaped support plate 2 by the crossbow piece pressure block 3 and the M6 ​​cylindrical head screw 12. The main string 9 and the secondary string 10 form a closed-loop connection with the pulley assembly 8, and when the crossbow is engaged, the front crossbow piece 4 and the rear crossbow piece 5 deform synchronously to store energy, and the energy is released by the main string 9 to fire the crossbow bolt.

[0031] It should be noted that the front crossbow stalk 4 and the rear crossbow stalk 5 are straight pieces with equal cross sections, which bend simultaneously when the arrow is attached. The main string 9 and the secondary string 10 form a closed loop through the pulley assembly 8, which allows for synchronous energy storage and balanced force distribution at both ends. The energy is released in a concentrated manner through the main string 9, which increases arrow speed and range, reduces local stress, and lowers the risk of breakage.

[0032] In this embodiment, specifically: the two ends of the secondary string 10 are provided with lugs 15, one lug 15 is attached to the hook 14 of the bow support 6, and the other lug 15 passes around the pulley assembly 8 and connects to the end of the crossbow blade, so as to realize the suspension connection of the two ends of the secondary string 10.

[0033] The secondary string 10 is connected to the hook 14 of the bow piece bracket 6 and the end of the crossbow piece through the two end lugs 15 respectively, and is guided by the pulley assembly 8 to form a stable winding. When the machine is mounted, the secondary string 10 evenly pulls the rear end of the crossbow piece to ensure that the front and rear deformations are synchronized and the force is symmetrical, preventing twisting, and ensuring smooth winding, low wear, and easy disassembly and assembly.

[0034] In this embodiment, specifically: when the front crossbow piece 4 and the rear crossbow piece 5 are deformed, the elastic deformation curve is constrained by the curved surface profile of the arc support plate 2, which is used to prevent the root of the crossbow piece from breaking.

[0035] It should also be understood that when the front crossbow piece 4 and the rear crossbow piece 5 bend, they fit against the curved surface of the arc support plate 2, limiting the deformation curvature and avoiding stress concentration at the root; overcoming the defects of traditional crossbow pieces that are prone to root breakage and delamination when freely bent, thus improving the service life and safety of the crossbow pieces.

[0036] In this embodiment, specifically: the pulley assembly 8 is installed on the upper part of the bow support 6 to guide the winding of the main string 9 and the secondary string 10 and reduce frictional resistance.

[0037] In addition, the pulley assembly 8 is located on the upper part of the bow support 6, which guides the main string 9 and the secondary string 10, converting sliding friction into rolling friction, reducing the resistance of hanging and releasing, saving effort, reducing wear, increasing transmission efficiency, and ensuring stable string movement.

[0038] In this embodiment, specifically: the buffer wheel axle assembly 7 is disposed in the middle of the crossbow head 1, and is used for buffering and limiting the stroke during the string pulling process.

[0039] It should be noted that the buffer wheel axle assembly 7 is installed in the middle of the crossbow head 1. When the string is under force, it provides elastic buffering, absorbs the impact, and avoids rigid collision damage to the string, pulley assembly 8, and crossbow head 1. At the same time, it limits the stroke to prevent over-stretching and overload breakage, thereby improving stability.

[0040] In this embodiment, specifically: the crossbow piece adopts a positioning pin fixing structure, and the crossbow piece positioning pin 21 is fixed on the arc surface support plate 20 with the crossbow piece fixing pin shaft.

[0041] Among them, the crossbow piece positioning pin 21 is pre-fixed on the arc surface support plate 20 with crossbow piece fixing pin shaft, providing a precise positioning reference for the crossbow piece 22 with positioning pin hole, replacing pure press-fit fixing, ensuring accurate and firm installation, preventing displacement and loosening, and ensuring consistent deformation.

[0042] In this embodiment, specifically: the crossbow piece 22 with the positioning pin hole is aligned with the crossbow piece positioning pin 21 through the pin hole, and then locked and fixed by the crossbow piece pressure plate 23 and the crossbow piece locking screw 24.

[0043] It should also be understood that the crossbow slab 22 with the positioning pin hole is fitted into the crossbow slab positioning pin 21 through the pin hole, and then pressed and locked by the crossbow slab pressure plate 23 and the crossbow slab locking screw 24. The positioning and pressing are double fixed, which is firm and not easy to slip, easy to disassemble and assemble, with high fit and controllable deformation trajectory.

[0044] In this embodiment, specifically: the main string 9 and the secondary string 10 together connect the front crossbow piece 4 and the rear crossbow piece 5 into a whole, and the deformation potential energy of both is released uniformly by the main string 9.

[0045] In addition, the main string 9 and the secondary string 10 work together to integrate the front crossbow piece 4 and the rear crossbow piece 5 into a single energy storage unit, accumulating potential energy synchronously when the arrow is in use; when released, the energy is concentrated and output through the main string 9, resulting in direct transmission, low loss, strong firing force, stable arrow speed, and high efficiency.

[0046] In this embodiment, specifically: M4 semi-circular head screw 11 and M5 cylindrical head screw 13 are used for assembling and fastening the crossbow head 1 and the buffer wheel shaft assembly 7, respectively.

[0047] Among them, M4 semi-circular head screw 11 fastens crossbow head 1, and M5 cylindrical head screw 13 fastens buffer wheel shaft assembly 7. Standard parts are connected in a targeted manner, and the force is even and reliable. Disassembly and maintenance are convenient, and the parts are not easy to loosen, ensuring assembly accuracy and stable operation.

[0048] In this embodiment, specifically: the curved surface profile of the arc-shaped support plate 20 with the crossbow piece fixing pin is consistent with the curved surface profile of the arc-shaped support plate 2, and the crossbow piece conforms to the corresponding curved surface for limiting when it deforms.

[0049] It should be noted that the curved surface support plate 20 with the crossbow piece fixing pin has the same curvature as the curved surface support plate 2. Regardless of the fixing method, the front crossbow piece 4 and the rear crossbow piece 5 fit the same curved surface during deformation, resulting in balanced force, uniform deformation law, strong versatility, further preventing root breakage and improving reliability.

[0050] Working principle or structural principle: The front crossbow piece 4 and the rear crossbow piece 5 are of equal cross-sectional thickness. They bend and deform synchronously when the trigger is engaged. The deformation curve is constrained by the curved surface of the arc support plate 2 to prevent the root from breaking. The secondary string 10 is connected to the hook 14 of the bow piece bracket 6 and the end of the crossbow piece by the lugs 15 at both ends, respectively, and passes around the pulley assembly 8. The main string 9 and the secondary string 10 form a closed loop with the pulley assembly 8, linking the front and rear crossbow pieces as a whole. They deform and store energy synchronously when the trigger is engaged, and release the potential energy uniformly by the main string 9 when the trigger is fired. The crossbow pieces can be fixed by pressure blocks or positioning pins, both of which fit the curved surface of the support plate. The pulley assembly 8 reduces string friction, and the buffer wheel axle assembly 7 buffers and limits the movement, achieving efficient energy storage, stable release, and durable operation.

[0051] 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.

[0052] 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.

[0053] 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 novel string-wound crossbow head device, comprising a crossbow head (1), an arc-shaped support plate (2), a crossbow limb pressure block (3), a front crossbow limb (4), a rear crossbow limb (5), a bow limb bracket (6), a buffer wheel axle assembly (7), a pulley assembly (8), a main string (9), a secondary string (10), an M4 semi-circular head screw (11), an M6 cylindrical head screw (12), an M5 cylindrical head screw (13), a hook (14), a hanging lug (15), an arc-shaped support plate with a crossbow limb fixing pin (20), a crossbow limb positioning pin (21), a crossbow limb with a positioning pin hole (22), a crossbow limb pressure plate (23), and a crossbow limb locking screw (24), characterized in that: The front crossbow piece (4) and the rear crossbow piece (5) are both straight pieces with equal cross-sectional thickness, and are fixed to the arc support plate (2) by the crossbow piece pressure block (3) and the M6 ​​cylindrical head screw (12); the main string (9) and the secondary string (10) are connected in a closed loop with the pulley assembly (8), and when the machine is mounted, the front crossbow piece (4) and the rear crossbow piece (5) deform synchronously to store energy, and the energy is released by the main string (9) to fire the crossbow bolt.

2. The novel wire-wound crossbow head device according to claim 1, characterized in that: The secondary string (10) has lugs (15) at both ends. One lug (15) is attached to the hook (14) of the bow support (6), and the other lug (15) passes around the pulley assembly (8) and connects to the end of the crossbow blade, so as to realize the suspension connection of the two ends of the secondary string (10).

3. The novel wire-wound crossbow head device according to claim 1, characterized in that: When the front crossbow piece (4) and the rear crossbow piece (5) are deformed, their elastic deformation curves are constrained by the curved surface profile of the arc support plate (2) to prevent the crossbow piece root from breaking.

4. The novel wire-wound crossbow head device according to claim 1, characterized in that: The pulley assembly (8) is installed on the upper part of the bow support (6) to guide the main string (9) and secondary string (10) winding and reduce frictional resistance.

5. A novel wire-wound crossbow head device according to claim 1, characterized in that: The buffer wheel axle assembly (7) is located in the middle of the crossbow head (1) and is used for buffering and limiting the stroke during the string pulling process.

6. A novel wire-wound crossbow head device according to claim 1, characterized in that: The crossbow limb adopts a positioning pin fixing structure, and the crossbow limb positioning pin (21) is fixed on the arc surface support plate (20) with crossbow limb fixing pin shaft.

7. A novel wire-wound crossbow head device according to claim 6, characterized in that: The crossbow slab (22) with the positioning pin hole is aligned with the crossbow slab positioning pin (21) through the pin hole, and then locked and fixed by the crossbow slab pressure plate (23) and the crossbow slab locking screw (24).

8. A novel wire-wound crossbow head device according to claim 1, characterized in that: The main string (9) and the secondary string (10) together connect the front crossbow piece (4) and the rear crossbow piece (5) into a whole, and the deformation potential energy of both is released by the main string (9).

9. A novel wire-wound crossbow head device according to claim 1, characterized in that: The M4 semi-circular head screw (11) and M5 cylindrical head screw (13) are used for assembling and fastening the crossbow head (1) and the buffer wheel shaft assembly (7), respectively.

10. A novel wire-wound crossbow head device according to claim 1, characterized in that: The curved surface profile of the arc-shaped support plate (20) with the crossbow piece fixing pin is consistent with the curved surface profile of the arc-shaped support plate (2), and the crossbow piece fits the corresponding curved surface for limiting when deformed.

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