Labor-saving ratio adjustable composite bow eccentric wheel

Abstract

The utility model discloses a composite bow eccentric wheel with an adjustable labor-saving ratio, which relates to the field of bows and arrows and comprises an eccentric wheel body, the eccentric wheel body comprises a rim and a shaft bracket, the shaft bracket is provided with a mounting hole, the mounting hole comprises a limiting groove, and the cross section of the limiting groove is of a regular polygon structure; the adjusting buckle is fixed to the mounting hole through a screw, a limiting protrusion is arranged at the bottom of the adjusting buckle, at least two chord stopping parts are arranged on the side edge of the adjusting buckle, the outer edge of the limiting protrusion is matched with the limiting groove, a threaded hole is formed in the limiting protrusion, and the distances between the chord stopping parts and the center of the threaded hole are different. The composite bow eccentric wheel with the adjustable labor-saving ratio has the function of adjusting the labor-saving ratio, a player can adjust the composite bow eccentric wheel by himself / herself so as to adapt to own strength and use habits, and the use experience is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bow and arrow, more specifically, the utility model relates to a composite bow eccentric wheel with adjustable power saving ratio. BACKGROUND

[0002] The composite bow is a long-range weapon with great power and long range, and is composed of elastic bow arms and flexible bow strings; the arrow comprises an arrowhead, an arrow shaft and arrow feathers, the arrowhead is made of copper or iron (modern arrowheads are mostly alloys), the arrow shaft is made of bamboo or wood (modern ones are mostly pure carbon or aluminum alloys), and the arrow feathers are carved eagle or goose feathers.

[0003] The biggest difference between the composite bow and the traditional bow is that the composite bow has a power saving ratio, that is, the force required to maintain the state of the bow string being pulled apart is much smaller than the force required to pull apart the bow string, the power saving ratio of the common composite bow on the market can reach 70%-90%, but the power saving ratio of the existing composite bow is determined after the production of the composite bow is completed and cannot be adjusted, which cannot meet the requirements and use habits of some players. SUMMARY

[0004] Technical problem

[0005] The utility model provides a composite bow eccentric wheel with adjustable power saving ratio, which solves the problem of unadjustable power saving ratio of the existing composite bow.

[0006] Technical scheme

[0007] To achieve the above-mentioned purpose, the utility model provides a composite bow eccentric wheel with adjustable power saving ratio, which comprises:

[0008] The eccentric wheel body comprises a rim and a shaft support, the shaft support is provided with a mounting hole, the mounting hole comprises a limiting groove, and the cross section of the limiting groove is a regular polygon structure.

[0009] The adjusting buckle is fixed with the mounting hole through a screw, the bottom of the adjusting buckle is provided with a limiting protrusion, the side edge is provided with at least two string stopping parts, the outer edge of the limiting protrusion matches the limiting groove, a threaded hole is formed in the inside, and the distance between each string stopping part and the center of the threaded hole is different.

[0010] As a preferred, the side wall of the adjusting buckle is provided with a through groove, the through groove is inlaid with a rubber strip, and the through groove and the rubber strip constitute the string stopping part.

[0011] As a preferred, the number of the string stopping part is the same as the number of the side of the cross section of the limiting groove.

[0012] As a preferred, the cross section of the limiting groove is a triangle.

[0013] The utility model discloses a regulating buckle is provided with the stop chord part, and the different stop chord parts are used as the stop point of compound bow and the contact of the auxiliary chord of compound bow through the rotation of regulating buckle, because the distance between each stop chord part and screw hole center is different, makes the different stop chord part corresponding bowstring's pull apart amount also different, thereby make the force of maintaining the bowstring pull -up state has the change, reach the effect of adjusting the power saving ratio, in this way, the player can adjust regulating buckle personally, adapt to own strength and use habit, improve use experience greatly. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of adjustable power saving ratio's compound bow eccentric wheel's structural schematic diagram for the utility model described;

[0015] Figure 2 It is the combined schematic diagram of mounting hole for the utility model described a kind of adjustable power saving ratio's compound bow eccentric wheel;

[0016] Figure 3 It is the structural schematic diagram of regulating buckle for the utility model described a kind of adjustable power saving ratio's compound bow eccentric wheel;

[0017] Figure 4 It is the bottom structure diagram of regulating buckle for the utility model described a kind of adjustable power saving ratio's compound bow eccentric wheel. DETAILED DESCRIPTION

[0018] The utility model is further explained in detail in conjunction with the drawings and examples, so that the person skilled in the art can implement according to the description text.

[0019] EXAMPLE

[0020] As Figure 1 And Figure 2 Shown, a kind of adjustable power saving ratio's compound bow eccentric wheel, comprising:

[0021] Eccentric wheel body 1, the eccentric wheel body 1 includes rim 12 and axle bracket 11, the rim 12 is used to pass and set the bowstring of compound bow, the inside of axle bracket 11 is equipped with shaft center 14, the bow piece of compound bow is connected with eccentric wheel body 1 through shaft center 14, when pulling the bowstring, eccentric wheel body 1 follows rotation, drives shaft center 14 to produce displacement, to make the bow piece of compound bow reach the force storage state, the axle bracket 11 is equipped with mounting hole 13, the mounting hole 13 includes limit slot 131, the cross section of limit slot 131 is regular polygon structure, as preferred, the cross section of limit slot 131 of this embodiment is regular triangle structure;

[0022] Regulating buckle 2, it is fixed with mounting hole 13 by screw, as Figure 4As shown, the bottom of the adjusting buckle 2 is provided with a limiting protrusion 22, and the side edge is provided with at least two chord stopping portions 23, such as Figure 3 As shown, the chord stopping portion 23 is composed of a through slot 231 provided on the side wall of the adjusting buckle 2 and a rubber strip 232 inlaid in the through slot 231, the outer edge of the limiting protrusion 22 matches the limiting slot 131, and a threaded hole 21 is formed in the inside, the distance between each chord stopping portion 23 and the center of the threaded hole 21 is different, in this embodiment, the installation mode is that the limiting protrusion 22 is inserted into the limiting slot 131, the screw is screwed from the bottom of the mounting hole into the threaded hole 21, so that the adjusting buckle 2 is fixed on the shaft support 11, and the number of the chord stopping portion 23 is three.

[0023] When it is necessary to adjust the power saving ratio of the compound bow, the screw is loosened, the adjusting buckle 2 is pulled out of the limiting slot 131, and after the other chord stopping portion 23 is used as the stopping point of the compound bow, the adjusting buckle 2 is fixed with the mounting hole 13, so that different chord stopping portions 23 can be used as the stopping point of the compound bow, and since the distance between each chord stopping portion 23 and the center of the threaded hole 21 is different, the position of the stopping point of the compound bow is actually changed, and finally the force required to maintain the state of the bowstring being pulled open changes after the bowstring is pulled open, so as to achieve the purpose of adjusting the power saving ratio.

[0024] In another embodiment, the shaft support 11 is provided with at least two mounting holes 13, and the adjusting buckle 2 can be installed on any mounting hole 13.

[0025] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A composite bow eccentric wheel with adjustable force-saving ratio, characterized in that, include: An eccentric wheel body, the eccentric wheel body including a wheel rim and a shaft frame, the shaft frame having a mounting hole, the mounting hole including a limiting groove, the limiting groove having a regular polygonal cross-section; The adjusting buckle is fixed to the mounting hole by screws. The bottom of the adjusting buckle is provided with a limiting protrusion, and the side edge is provided with at least two stop parts. The outer edge of the limiting protrusion matches the limiting groove, and a threaded hole is opened inside. The distance between each stop part and the center of the threaded hole is different.

2. The adjustable force-saving ratio composite bow eccentric wheel according to claim 1, characterized in that, The adjusting buckle has a through groove on its side wall, and a rubber strip is embedded in the through groove. The through groove and the rubber strip form a stop part.

3. The adjustable force-saving ratio composite bow eccentric wheel according to claim 1, characterized in that, The number of the stop sections is the same as the number of sides of the cross-section of the limiting groove.

4. The adjustable force-saving ratio composite bow eccentric wheel according to claim 1, characterized in that, The cross-section of the limiting groove is triangular.

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