CN109682252B

CN109682252B - Novel pulley crossbow

Info

Publication number: CN109682252B
Application number: CN201910182548.5A
Authority: CN
Inventors: 彭晓君; 邓雷雷; 张柏添; 罗君; 李豪杰; 林东鸿; 朱先勇; 李焕军; 阮铭业; 朱丽莎
Original assignee: Zhaoqing University
Current assignee: Zhaoqing University
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2023-08-18
Anticipated expiration: 2039-03-12
Also published as: CN109682252A

Abstract

The invention discloses a novel pulley crossbow which comprises a crossbow body, wherein one end of the crossbow body is provided with a trigger device for controlling the launching of a crossbow bolt, the trigger device is connected with a push-arrow assembly for pushing the crossbow bolt, the crossbow body is also provided with a pulley device for driving the push-arrow assembly to move and a movable string for connecting the pulley device and the push-arrow assembly, the pulley device comprises at least one group of movable pulleys and a power accumulating spring for resetting the pulleys, the crossbow body is provided with a positioning groove matched with the pulleys to slide, the movable string is slidably arranged on the pulleys to drive the pulleys to move in the positioning groove, one end of the movable string is connected with the push-arrow assembly, and the other end of the movable string is fixed on the crossbow body. The invention uses a plurality of spiral power accumulating springs to replace plate springs with larger occupied space, uses an internal string to replace an external string, and is matched with corresponding pulleys, thereby greatly reducing the winding force required during string pulling and enabling the crossbow to obtain larger initial speed of string releasing.

Description

Novel pulley crossbow

Technical Field

The invention relates to the technical field of bows and arrows, in particular to a pulley crossbow with a novel structure.

Background

Crossbow is a very important remote attack weapon in the cold weapon era, has the characteristics of long range, high hit rate and high killing power, and can be manufactured into various structures such as individual crossbow, crossbow vehicle and the like according to the needs, so as to attack different targets. As thermal weapons develop, crossbows have gradually exited the military stage. In recent years, along with the expansion of battlefields for anti-terrorism and special combat, crossbows have good concealment applicability due to the characteristics of low sound, low heat and no light, so that crossbows are favored by armies and police officers in various countries.

At present, along with the development of materials, the structure of a crossbow body and a crossbow plate is improved compared with the era of cold weapons. But the main structures are different in size and are mainly embodied in the form of crossbows. The bow is mainly composed of a crossbow arm, a crossbow machine, a crossbow bow and a bow string. The bow and crossbow takes a material with higher elastic modulus (mainly a plate spring) as a power storage device, and the initial launching speed is high.

As a main force accumulating device of the crossbow, the crossbow requires a larger transverse stretching space to provide flexible deformation for the plate spring. The common crossbow needs an extension distance of about 600mm, and the partially improved crossbow also needs an extension distance of at least about 400 mm. The length of the crossbow arm of the light crossbow is about 600mm, and the length of the crossbow arm of the strong crossbow can reach 1000mm. That is, the crossbow requires a space of 400mm×600mm to 600mm×1000mm when in use. The occupied space is too large, so that the crossbow is not suitable for being used in sports, especially in jungles and houses. Even when not in use, it is extremely difficult to carry.

Modern crossbows employ more advanced materials and mechanical structures, and the bow portion is foldable, thus making the crossbow more convenient to carry. However, when in use, additional time is required to extend and fix the crossbow. In addition, the folding structure cannot solve the problem that the crossbow occupies too much space in the use process. In addition, in order to increase the initial speed and penetration force of the bolt, the bolt uses a plate spring with a large elastic modulus, so that a pulling force of more than 300N is required when the string is pulled. Part strong crossbow has increased pedal ring even at the front end of crossbow, needs to use the supplementary string of drawing of foot, and is laborious consuming time, uses very inconvenient.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel pulley crossbow which can solve the problems of large occupied space, large winding force and the like of a common bow crossbow when the common bow crossbow is carried and used.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a novel pulley crossbow, includes the crossbow body, the one end of crossbow body is equipped with the trigger device that is used for controlling the bolt to launch, trigger device is connected with the arrow pushing component that is used for promoting the bolt, arrow pushing component activity is located on the crossbow body, still be equipped with on the crossbow body and be used for driving the pulley device that pushes away arrow component and be used for connecting pulley device and pushing away the activity string of arrow component, pulley device includes the pulley of at least a set of activity and the power spring that is used for the pulley to reset, be equipped with the gliding constant head tank of adaptation pulley on the crossbow body, activity string slides and locates on the pulley in order to drive the pulley and remove in the constant head tank, the one end of activity string links to each other with arrow pushing component, the other end of activity string is fixed on the crossbow body.

As an improvement, the trigger device comprises a trigger and a clamping block for movably locking the arrow pushing assembly, the trigger is connected with the clamping block through a self-locking rod, the bottom of the self-locking rod is also connected with a plate spring for tensioning the self-locking rod, the trigger, the clamping block and the self-locking rod are all hinged on the crossbow body, one end of the plate spring is fixed on the crossbow body, and the other end of the plate spring is kept in fit with the self-locking rod.

As an improvement, push away arrow subassembly includes backup pad and perpendicular to backup pad from the locking piece, the top of fixture block is equipped with the trip of adaptation locking from the locking piece, be equipped with the locating plate that is used for the location crossbow in the backup pad, be equipped with from locking piece and movable string fixed connection's fixed block.

As an improvement, the tail end of the supporting plate is provided with a pull handle.

As an improvement, the pulley device further comprises a connecting piece for connecting the pulley and the power storage spring, a hanging lug for fixing the power storage spring is arranged on the left side end face of the connecting piece, and a chute for fastening the pulley is arranged on the upper side, close to the right side end face, of the connecting piece.

As an improvement, push away arrow subassembly still including being used for buffering and push away the buffer assembly of arrow subassembly, buffer assembly includes buffer pin and the buffer spring of adaptation buffer pin, the buffer pin is located on the self-locking piece, buffer spring locates the end of crossbow body through the sleeve.

As an improvement, the tail end of the crossbow body is provided with a sight glass.

As an improvement, the crossbow body is also provided with an arrow groove for positioning a bolt.

As an improvement, the pulley device comprises three groups of pulleys and power accumulating springs which are correspondingly arranged.

Compared with the prior art, the invention has the beneficial effects that.

(1) The invention uses a plurality of spiral power accumulating springs to replace plate springs with larger occupied space, uses an internal string to replace an external string, and is matched with a corresponding pulley, thereby greatly reducing the winding force required during string pulling and enabling a crossbow to obtain larger initial speed of string leaving and obtaining more ideal comprehensive use effect.

(2) In the invention, the arrow pushing component is connected with the pulley device through the movable string, and the speed of each movable pulley is multiplied on the arrow pushing component according to the movement principle of the movable pulleys, so that the initial launching speed of the crossbow is greatly improved. The invention adopts three groups of corresponding pulleys and power accumulating springs, improves the storage capacity of mechanical energy and greatly improves the pushing and ejecting force.

(3) The pulley device is embedded in the crossbow body as an energy storage device, the working space and the carrying space are greatly reduced compared with the traditional bow and crossbow, the internal structure is simple, the assembly and the maintenance are easy, and when the crossbow is launched underwater, no underwater resistance is generated due to large space movement of the leaf spring, so that the crossbow is suitable for shooting underwater.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the structure of the present invention in a string-tight state.

Fig. 3 is a schematic view of the structure of the present invention in a loose string state.

FIG. 4 is a schematic view of the structure of the present invention with respect to the trigger device locking the push arrow assembly.

FIG. 5 is a schematic view of the structure of the trigger assembly after unlocking the push arrow assembly.

FIG. 6 is a schematic view of the structure of the arrow pushing assembly and the buffer assembly according to the present invention.

Fig. 7 is a schematic view of the structure of the pulley device according to the present invention.

Fig. 8 is a schematic view of the present invention in relation to the pulley arrangement and arrow pushing assembly in a string-tight condition.

Fig. 9 is a schematic view of the structure of the present invention in relation to the pulley arrangement and arrow pushing assembly in the loose string condition.

In the figure:

crossbow body 1, crossbow 2, trigger device 3, arrow pushing assembly 4, pulley device 5, movable string 6, positioning groove 7, buffer assembly 8, sight 9, arrow groove 10, bow 11, trigger 30, fixture block 31, self-locking lever 32, leaf spring 33, support plate 40, self-locking block 41, positioning plate 42, fixed block 43, pull handle 44, pulley 50, power spring 51, connector 52, tail 60, head 61, cable 62, first positioning groove 70, second positioning groove 71, third positioning groove 72, buffer pin 80, buffer spring 81, sleeve 82, first hinge point 300, hook 310, second hinge point 311, second hook 312, third hinge point 320, snap-in ramp 410, first pulley 500, second pulley 501, third pulley 502, first power spring 510, second power spring 511, third power spring 512, hanger 520, chute 521.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a novel pulley crossbow comprises a crossbow body 1, wherein the crossbow body 1 is a sheet metal part, so that the production period and the production cost can be greatly reduced, and the production efficiency of the pulley crossbow can be improved. The one end of crossbow body 1 is equipped with the trigger device 3 that is used for controlling the transmission of bolt 2, still is equipped with bow 11 on the position that the crossbow body 1 is close to trigger device 3, thereby the user of facilitating the use holds the pulley crossbow, thereby also convenient to use pulls trigger device 3 simultaneously and launches bolt 2, the end of crossbow body 1 is equipped with sight 9 for the user aims the shooting object. The trigger device 3 is connected with a push arrow assembly 4 for pushing the crossbow 2, correspondingly, the crossbow body 1 is further provided with an arrow groove 10 for positioning the crossbow 2, the push arrow assembly 4 can move along the length direction of the arrow groove 10, in other words, the push arrow assembly 4 can move on the crossbow body 1 movably, so that the effect of pushing the crossbow 2 is achieved. Specifically, the trigger device 3 includes a trigger 30 and a latch 31 for movably locking the arrow pushing assembly 4, the latch 31 is provided with a hook 310, the trigger 30 and the latch 31 are connected by a self-locking rod 32, a plate spring 33 for tensioning the self-locking rod 32 is further connected to the bottom of the self-locking rod 32, the trigger 30, the latch 31 and the self-locking rod 32 are hinged to the crossbow body 1, that is, the trigger 30, the latch 31 and the self-locking rod 32 can rotate around their corresponding first hinge point 300, second hinge point 311 and third hinge point 320 respectively, while one end of the plate spring 33 is fixed to the crossbow body 1, the other end of the plate spring 33 is kept in contact with the self-locking rod 32 to drive the self-locking rod 32 to rotate, in other words, when the user pulls down the trigger 30, that is, the force of the user pulling down the trigger 30 is greater than the elastic tensioning force generated by the plate spring 33, the self-locking rod 32 rotates counterclockwise at the third hinge point 320, so that the self-locking rod 32 leaves the latch 31, and the latch 31 rotates clockwise around the second hinge point 311 due to the elastic force of the spring 51, as shown in fig. 5.

The push arrow assembly 4 comprises a supporting plate 40 and a self-locking block 41 perpendicular to the supporting plate 40, wherein the tail end of the supporting plate 40 is provided with a pull handle 44, the pull handle 44 has the effect of increasing the contact area of a user pulling the push arrow assembly 4, the push arrow assembly 4 is pulled more easily, the self-locking block 41 is provided with a clamping inclined plane 410, the clamping hook 310 is adapted to the clamping of the self-locking block 41, the supporting plate 40 is provided with a positioning plate 42 for positioning a crossbow 2, the self-locking block 41 is also provided with a fixing block 43 fixedly connected with the movable string 6, the user pulls the pull handle 44 to enable the fixing block 43 to move, and the movable string 6 is pulled by the movement of the fixing block 43, so that the movable string 6 is kept in a tight string or loose string state. When the strings are pulled, the self-locking block 41 enters the clamping hook 310 along the clamping inclined surface 410, so that the self-locking block 41 is hooked by the clamping hook 310, the clamping block 31 is driven by the clamping inclined surface 410 in the clamping process of the self-locking block 41 to rotate anticlockwise around the second hinging point 311, the movable string 6 is tensioned and kept in a string tightening state, so that potential energy for pushing the crossbow 2 to launch is stored, and when the second clamping hook 312 of the clamping block 31 is separated from contact with the self-locking rod 32, the plate spring 33 is converted from the compressed state to the state of being expanded upwards, the self-locking rod 32 is pushed to push the self-locking rod 32 upwards, so that the self-locking rod 32 is respectively clung to the trigger 30 and the second clamping hook 312 in the horizontal direction, and the potential energy for moving the self-locking rod 32 upwards all the time is kept, as shown in fig. 4. When the trigger 30 is pulled, the trigger 30 rotates around the first hinge point 300 to press the self-locking rod 32 downwards, the self-locking rod 32 swings downwards around the third hinge point 320, the second clamping hook 312 is separated from the locking of the self-locking rod 32, the clamping block 31 rotates clockwise around the second hinge point 311 under the lifting of the self-locking rod 32, the self-locking block 41 is separated from the locking of the clamping hook 310 under the pulling of the movable string 6, namely, the arrow pushing assembly 4 releases the locking state of the trigger device 3 under the pulling of the movable string 6, and the arrow pushing assembly 4 moves forwards rapidly under the pulling of the movable string 6, so that the bolt 2 is launched, as shown in fig. 5.

Simultaneously, the downward swinging self-locking rod 32 presses the plate spring 33, so that the plate spring 33 stores elastic potential energy for pushing the self-locking rod 32 upwards, and prepares for locking the arrow pushing assembly 4 for the next string pulling.

As shown in fig. 2, 3, 8 and 9, the crossbow body 1 is further provided with a pulley device 5 for driving the arrow pushing assembly 4 to move and a movable string 6 for connecting the pulley device 5 and the arrow pushing assembly 4, one end of the movable string 6 connected with the fixed block 43 is a string tail 60, a string head 61 of the movable string 6 is fixed on the crossbow body 1, and a portion between the string head 61 and the string tail 60 is a string cable 62. The bearing point of the bolt 2 is a tail, the tail is lapped with the string tail 60 through the fixing block 43, and when the string tail 60 moves forwards, the bolt 2 is pushed to move forwards through the tail. It should be further noted herein that the stretchability of the active string 6 increases the overall length of the cable 62 during firing of the bolt 2, thereby affecting the speed of the arrow, and therefore, it is undesirable to use an active string 6 having stretchability, even if the active string 6 has some stretchability or elasticity, the maximum stretchable length thereof should be small, so that the maximum string length can be reached before the end of the process of firing the bolt 2. Although the present embodiment is directed to "bolt" as the firing target, a round object such as "shot" may be used as the firing target, provided that a suitable tailstock 60 power transmission structure is used, such as a modified anesthesia bolt or tracker, is shot onto the animal, such as by tying the tailstock 60 with a "leather pocket".

As shown in fig. 2, 3, 7, 8 and 9, the pulley device 5 includes at least one movable pulley 50 and a power spring 51 for resetting the pulley 50, a connecting piece 52 is further disposed between the connecting pulley 50 and the power spring 51, a hanging lug 520 for fixing the power spring 51 is disposed on a left end face of the connecting piece 52, a chute 521 for fastening the pulley 50 is disposed on an upper side of a right end face of the connecting piece 52, the pulley 50 is fastened on the chute 521 and can rotate, and the chute 521 is used for preventing the power spring 51 from being directly connected with the pulley 50 to cause the pulley 50 to be easily loosened from the power spring 51, so that compactness is enhanced. In this embodiment, the pulley device 5 includes three sets of pulleys 50 and power springs 51 correspondingly disposed, and one pulley 50 is used in combination with one power spring 51, so that a cable 62 sequentially wound around the three pulleys 50 can obtain a larger acceleration ratio. The pulley 50 is a movable pulley, and according to the motion principle of the movable pulley, the movable pulley is essentially a lever (labor-saving lever) with a power arm equal to 2 times of a resistance arm, and the lever cannot change the direction of the force, but can save half of the force at most, but does not save work. By using the movable pulley, the winding force required by pulling the arrow pushing assembly 4 is greatly reduced, and the purpose of saving labor is achieved. And by adopting three groups of power accumulating springs 51, the storage capacity of mechanical energy is improved, and the pushing and shooting force is improved, so that the initial launching speed of the bolt 2 is increased. Correspondingly, the crossbow body 1 is provided with a positioning groove 7 which is matched with the sliding of the pulley 50, and the movable string 6 is arranged on the pulley 50 in a sliding way to drive the pulley 50 to move in the positioning groove 7. Specifically, the movable string 6 is sequentially wound around the circumferences of the three pulleys 50 in a winding manner with left and right intervals, the three pulleys 50 from bottom to top are sequentially a first pulley 500, a second pulley 501 and a third pulley 502, correspondingly, the first pulley 500 is correspondingly equipped with a first power spring 510 and slides in the first positioning groove 70, the second pulley 501 is correspondingly equipped with a second power spring 511 and slides in the second positioning groove 71, and the third pulley 502 is correspondingly equipped with a third power spring 512 and slides in the third positioning groove 72. For example, the right end of the first power spring 510 is fixed on the crossbow body 1, the left end of the first power spring 510 is connected to the first pulley 500 through the corresponding connecting piece 52, the left end of the second power spring 511 is fixed on the crossbow body 1, the right end of the second power spring 511 is connected to the second pulley 501 through the corresponding connecting piece 52, similarly, the right end of the third power spring 512 is fixed on the crossbow body 1, and the left end of the third power spring 512 is connected to the third pulley 502 through the corresponding connecting piece 52. The string head 61 is first fixed to the left end of the bottom of the crossbow body 1, while the string 62 is looped around the right half circumference of the first pulley 500 in a semi-encircling manner and passed through the corresponding connector 52, then continues to be looped around the left half circumference of the second pulley 501 in the same manner, and then the rear string tail 60 is fixed to the fixed block 43 in the same manner as it is looped around the right half circumference of the third pulley 502, at which time the installation of the movable string 6 is completed.

In the loose string state, as shown in fig. 9, each power spring 51 is in a freely loosened and contracted state, and each pulley 50 is under the traction of the corresponding power spring 51 and is in an initial position, that is, the first pulley 500 is disposed at the rightmost end of the first positioning slot 70, the second pulley 501 is disposed at the leftmost end of the second positioning slot 71, the third pulley 502 is disposed at the rightmost end of the third positioning slot 72, and the whole arrow pushing assembly 4 is disposed at the rightmost end of the arrow slot 10 under the traction of the string tail 60. When the string is pulled, the arrow pushing assembly 4 is pulled towards the direction of the trigger device 3, the string tail 60 synchronously moves towards the direction of the trigger device 3 under the pulling of the fixed block 43, the first pulley 500 moves leftwards along the first positioning groove 70 under the pulling of the string 62, at this time, the first pulley 500 synchronously pulls the first power spring 510 leftwards, so that the first power spring 510 is gradually stretched and stores elastic potential energy overcoming elastic deformation (i.e. potential energy pulling the first pulley 500 rightwards), the second pulley 501 moves rightwards along the second positioning groove 71, at this time, the second pulley 501 synchronously pulls the second power spring 511 rightwards, so that the second power spring 511 is gradually stretched and stores elastic potential energy overcoming elastic deformation (i.e. potential energy pulling the second pulley 501 leftwards), and the action of the third pulley 502 is the same as that of the first pulley 500, and will not be repeated herein. When the self-locking block 41 in the arrow pushing assembly 4 is clamped into the clamping hook 310 of the clamping block 31, the invention is in a string tightening state of an arrow to be sent, as shown in fig. 4 and 8, namely, the first pulley 500 is positioned at the leftmost end of the first positioning groove 70, the second pulley 501 is positioned at the rightmost end of the second positioning groove 71, and the third pulley 502 is positioned at the leftmost end of the third positioning groove 71, at this time, the first power spring 510, the second power spring 511 and the third power spring 512 respectively store the maximum elastic potential energy (i.e. reach the maximum stretching stroke). When the trigger 30 is pulled down, as shown in fig. 5 and 9, the first power spring 510, the second power spring 511 and the third power spring 512 respectively pull the corresponding pulleys 50 to reset, the movable string 6 pulls the arrow pushing assembly 4 to move towards the sight 9, and the arrow pushing assembly 4 moves to push the crossbow 2 to shoot out at a high speed, so as to finish the action of shooting the crossbow 2 and enable the invention to be in the loose string state. According to the technical scheme, the pulleys 50 which are adjacent up and down are simultaneously moved away from each other, simulation and calculation can show that under the condition that the forward movement speed of the string tail 60 is constant, compared with a conventional pulley block structure (namely, the movable pulley and the fixed pulley are matched for use), the kinetic energy of the pulleys 50 can be effectively reduced, in other words, under the condition that the bow and the crossbow do work at a certain speed, more energy can be transferred to the crossbow 2, and therefore the higher arrow speed is achieved. The number of the pulleys 50 and the power spring 51 is not limited to three in the embodiment, and the number of the groups can be determined according to the actual requirement. Further, the circumferential surface of the pulley 50 in contact with the cable 62 should be smooth to reduce frictional resistance caused by sliding of the cable 62 along the circumferential surface of the pulley 50. For example, the pulley 50 may be made of a metal or ceramic material and contact the cable 62 with a smooth surface, or other structures that further reduce frictional resistance may be employed. For example, a lubricating oil film is applied between the cable 62 and the surface of the pulley 50. It should be noted that the pulley 50 needs to minimize its own weight, for example, by using a carbon fiber material for the pulley 50. In this embodiment, the firing rate of the bolt 2 may be adaptively adjusted, and in order to achieve a faster firing rate, as shown in fig. 9, the length L1 of the first positioning slot 70, the length L2 of the second positioning slot 71, and the length L3 of the third positioning slot 72 are related by L3 > L1 > L2, so that the firing rate of the bolt 2 may be increased by increasing the lengths of L1, L2, and L3, and when it is desired to decrease the firing rate of the bolt 2, the decreasing may be achieved by decreasing the length of one or both of L1, L2, and L3, or both.

As an improvement, as shown in fig. 1 and 6, after the arrow pushing assembly 4 is excited and pushes the bolt 2, a certain impact inertia is kept under the drive of the string tail 60, in order to offset the direct impact of the impact inertia on the present invention, the present embodiment further includes a buffer assembly 8 for buffering the arrow pushing assembly 4, the buffer assembly 8 includes a buffer pin 80 and a buffer spring 81 adapted to the buffer pin 80, the buffer pin 80 is disposed on the self-locking block 41, the buffer spring 81 is disposed at the end of the crossbow body 1 through a sleeve 82 and is coaxially disposed with the buffer pin 80, the buffer pin 80 is inserted into the sleeve 82, contacts with the buffer spring 81 and compresses the buffer spring 81, so that the impact force of the arrow pushing assembly 4 is converted into the elastic force of the compression buffer spring 81, and the function of protecting the arrow pushing assembly 4 is played.

In summary, the present invention uses the plurality of spiral power accumulating springs 51 to replace the plate spring with larger occupied space, uses the internal movable string 6 to replace the external string, and cooperates with the corresponding pulley 50, thereby greatly reducing the winding force required during string pulling and enabling the crossbow 2 to obtain larger initial speed of releasing strings, and obtaining more ideal comprehensive use effect. In addition, the pulley device 5 is used as an energy storage device and is embedded in the crossbow body 1, the working space and the carrying space are greatly reduced compared with the traditional bow and crossbow, and the internal structure is simple and easy to assemble and maintain.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. A novel pulley crossbow, its characterized in that: the automatic crossbow comprises a crossbow body (1), wherein a trigger device (3) for controlling the launching of a crossbow bolt (2) is arranged at one end of the crossbow body (1), a push arrow component (4) for pushing the crossbow bolt (2) is connected to the trigger device (3), the push arrow component (4) is movably arranged on the crossbow body (1), a pulley device (5) for driving the push arrow component (4) to move and a movable string (6) for connecting the pulley device (5) and the push arrow component (4) are further arranged on the crossbow body (1), the pulley device (5) comprises at least one group of movable pulleys (50) and a force accumulating spring (51) for resetting the pulleys (50), a positioning groove (7) for adapting the pulleys (50) to slide is formed in the crossbow body (1), the movable string (6) is slidably arranged on the pulleys (50) to drive the pulleys (50) to move in the positioning groove (7), one end of the movable string (6) is connected with the push arrow component (4), and the other end of the movable string (6) is fixed on the crossbow body (1).

The trigger device (3) comprises a trigger (30) and a clamping block (31) for movably locking the arrow pushing assembly (4), the trigger (30) is connected with the clamping block (31) through a self-locking rod (32), the bottom of the self-locking rod (32) is also connected with a plate spring (33) for tensioning the self-locking rod (32), the trigger (30), the clamping block (31) and the self-locking rod (32) are all hinged on the crossbow body (1), one end of the plate spring (33) is fixed on the crossbow body (1), and the other end of the plate spring (33) is kept in fit with the self-locking rod (32);

the arrow pushing assembly (4) comprises a supporting plate (40) and a self-locking block (41) perpendicular to the supporting plate (40), a clamping hook (310) which is used for adaptively locking the self-locking block (41) is arranged at the top end of the clamping block (31), a positioning plate (42) used for positioning a crossbow (2) is arranged on the supporting plate (40), and a fixed block (43) fixedly connected with a movable string (6) is arranged on the self-locking block (41);

the tail end of the supporting plate (40) is provided with a pull handle (44);

the pulley device (5) further comprises a connecting piece (52) used for connecting the pulley (50) and the power storage spring (51), a hanging lug (520) used for fixing the power storage spring (51) is arranged on the left side end face of the connecting piece (52), and a chute (521) used for fastening the pulley (50) is arranged on the upper side, close to the right side end face, of the connecting piece (52).

2. The novel roller crossbow of claim 1, wherein: the arrow pushing assembly (4) further comprises a buffer assembly (8) used for buffering the arrow pushing assembly (4), the buffer assembly (8) comprises a buffer pin (80) and a buffer spring (81) matched with the buffer pin (80), the buffer pin (80) is arranged on the self-locking block (41), and the buffer spring (81) is arranged at the tail end of the crossbow body (1) through a sleeve (82).

3. A novel roller crossbow according to claim 1 or claim 2, wherein: the tail end of the crossbow body (1) is provided with a sight glass (9).

4. A novel roller crossbow according to claim 3, wherein: and an arrow groove (10) for positioning the crossbow bolt (2) is further formed in the crossbow body (1).

5. The novel roller crossbow of claim 1, wherein: the pulley device (5) comprises three groups of pulleys (50) and power accumulating springs (51) which are correspondingly arranged.