Composite bow eccentric wheel set

Abstract

The utility model discloses a composite bow eccentric wheel set which comprises a first bow wheel and a second bow wheel, and four auxiliary chords and two main chords are installed between the first bow wheel and the second bow wheel. The first bow wheel and the second bow wheel are the same in structure, each of the first bow wheel and the second bow wheel comprises a bow wheel main body, the edge of each bow wheel main body is provided with a string groove, two sides of each bow wheel main body are respectively provided with a bow wheel bolt column, two sides of each bow wheel main body are respectively provided with an auxiliary wheel, and each bow wheel main body is provided with a rotating shaft; one ends of the two main strings are fixed on the main string bolt column of the first bow wheel along the string groove of the first bow wheel, and the other ends of the two main strings are fixed on the main string bolt column of the second bow wheel along the string groove of the second bow wheel. The two ends of the four auxiliary cables can synchronously rotate along with the wheel shaft, and the auxiliary cables are symmetrically distributed, so that auxiliary chords on the two sides of the auxiliary wheel are evenly stressed, and deflection of the bow wheel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of compound bow accessories, in particular to an eccentric wheel set for a compound bow. Background Art

[0002] The compound bow is mainly assembled from a bow handle, a wheel set, a bow string, a limb, and a limb seat. The existing publication number CN207113709U discloses an anti-deformation compound bow, in which a first limb string is arranged between a first limb string hanging head and a second limb string wheel, and a second limb string is arranged between a second limb string hanging head and the first limb string wheel.

[0003] The technical problem of the above technology is that the wheels are prone to twisting due to the different forces on the two bow strings. In order to solve the above problem, some users will add resin pads between the strings and the wheels. Due to the different thicknesses of the resin pads, they are corrected, but the correction is too troublesome and cannot completely correct the deflection of the bow wheel in dynamic or static use, thus affecting the accuracy. In order to solve the above technical problem, we propose an eccentric wheel set for a compound bow. Utility Model Content

[0004] The utility model aims to provide an eccentric wheel set for a compound bow to solve the problems in the prior art.

[0005] To achieve the above object, the utility model provides the following technical solutions: an eccentric wheel assembly for a compound bow, comprising a first bow wheel and a second bow wheel, wherein four secondary strings and two primary strings are installed between the first bow wheel and the second bow wheel;

[0006] The first bow wheel and the second bow wheel have the same structure. Both the first bow wheel and the second bow wheel include a bow wheel body. A string groove is provided on the edge of the bow wheel body. Bow wheel bolts are installed on both sides of the bow wheel body. Auxiliary wheels are installed on both sides of the bow wheel body. A rotating shaft is installed on the bow wheel body.

[0007] One end of the two main chords is along the chord groove of the first bow wheel and fixed on the main chord bolt of the first bow wheel, and the other end of the two main chords is along the chord groove of the second bow wheel and fixed on the main chord bolt of the second bow wheel;

[0008] One end of the auxiliary chord is fixed to the auxiliary chord bolt of the sleeve of the rotating shaft at the first bow wheel, and the other end of the auxiliary chord is connected to the bow wheel bolt along the guide groove of the auxiliary wheel on the same side of the second bow wheel;

[0009] One end of the other auxiliary chord on the same side is fixed to the auxiliary chord bolt of the sleeve of the rotating shaft at the second bow wheel, and the other end of the auxiliary chord is connected to the bow wheel bolt along the guide groove of the auxiliary wheel on the same side of the first bow wheel;

[0010] The two secondary strings on the other side of the bow wheel are installed in the same way as the opposite side;

[0011] The two ends of the four auxiliary strings are crossed on the same side and arranged symmetrically on both sides. The auxiliary strings will rotate synchronously up and down with the wheel axle, which also makes the auxiliary strings on both sides of the bow wheel bear uniform force and avoids twisting of the bow wheel.

[0012] Preferably, connectors are installed at both ends of the rotating shaft, and the connectors are installed with bow pieces.

[0013] Preferably, sleeves are installed at both ends of the rotating shaft, and the sleeves and the rotating shaft are fixed by secondary chord bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Auxiliary wheels are installed on both sides of the bow wheel body. One end of the auxiliary string is fixed on the sleeve bolts at both ends of the rotating shaft at the first bow wheel, and the other end of the auxiliary string is connected to the bolt along the guide groove of the auxiliary wheel of the second bow wheel on the same side. The single side increases from one auxiliary string to two auxiliary strings, which are crossed on the same side and arranged symmetrically on both sides. At the same time, the auxiliary strings rotate synchronously with the wheel shaft. The symmetrical auxiliary strings on the left and right sides make the auxiliary strings on both sides of the bow wheel evenly stressed, so that the bow wheel will not be twisted whether in dynamic or static conditions; the twisting phenomenon of the bow wheel caused by different stress and force on the bow pieces is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the upper part of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the rotating shaft, sleeve and secondary chord bolt of the utility model.

[0020] In the figure: 1. first bow wheel; 2. bow piece; 3. secondary string; 4. main string; 5. second bow wheel; 6. rotating shaft; 7. main string bolt; 8. connecting head; 9. secondary wheel; 10. sleeve; 11. secondary string bolt; 12. bow wheel bolt. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0022] See also Figure 1-3 In an embodiment of the utility model, a composite bow eccentric wheel assembly includes a first bow wheel 1 and a second bow wheel 5, and four secondary strings 3 and two main strings 4 are installed between the first bow wheel 1 and the second bow wheel 5;

[0023] The first bow wheel 1 and the second bow wheel 5 have the same structure. The first bow wheel 1 and the second bow wheel 5 both include a bow wheel body, a string groove is provided on the edge of the bow wheel body, bow wheel bolts 12 are installed on both sides of the bow wheel body, auxiliary wheels 9 are installed on both sides of the bow wheel body, and a rotating shaft 6 is installed on the bow wheel body;

[0024] One end of the two main chords 4 is along the chord groove of the first bow wheel 1 and fixed on the main chord bolt 7 of the first bow wheel 1, and the other end of the two main chords 4 is along the chord groove of the second bow wheel 5 and fixed on the main chord bolt 7 of the second bow wheel 5;

[0025] One end of the auxiliary chord 3 is fixed to the auxiliary chord bolt 11 of the sleeve 10 of the rotating shaft 6 at the first bow wheel 1, and the other end of the auxiliary chord 3 is connected to the bow wheel bolt 12 along the guide groove of the auxiliary wheel 9 on the same side of the second bow wheel 5;

[0026] One end of the other secondary chord 3 on the same side is fixed to the secondary chord bolt 11 of the sleeve 10 of the rotating shaft 6 at the second bow wheel 5, and the other end of the secondary chord 3 is connected to the bow wheel bolt 12 along the guide groove of the secondary wheel 9 on the same side of the first bow wheel 1;

[0027] Sleeves 10 are installed at both ends of the rotating shaft 6, and the sleeve 10 and the rotating shaft 6 are fixed by a secondary chord bolt 11, one end of the secondary chord 3 on one side is fixed to the secondary chord bolt 11 of the sleeve 10 of the rotating shaft 6 at the first bow wheel 1, and the other end of the secondary chord 3 is connected to the bow wheel bolt 12 along the guide groove of the secondary wheel 9 of the second bow wheel 5; one end of the other secondary chord 3 on the same side is fixed to the secondary chord bolt 11 of the sleeve 10 of the rotating shaft 6 at the second bow wheel 5, and the other end of the secondary chord 3 is connected to the bow wheel bolt 12 along the guide groove of the secondary wheel 9 of the first bow wheel 1, and the secondary chord is increased from one side to two on one side, forming a cross on the same side and a symmetrical layout on both sides. The two ends will rotate synchronously with the wheel shaft, so that the secondary chords on both sides of the bow wheel are evenly stressed, avoiding bow wheel twisting, and ensuring that the bow wheel will not twist in either dynamic or static conditions; the problem of bow wheel twisting caused by different chord lengths and different forces on both sides due to the pulling of the user is completely solved.

[0028] Connectors 8 are installed at both ends of the rotating shaft 6, and the connectors 8 are installed with the bow pieces 2.

[0029] The working principle of the utility model is as follows: the bow wheel main body is installed with a secondary wheel 9, one end of the secondary string 3 is fixed on the secondary string bolt 11 of the sleeve 10 of the rotating shaft 6 at the first bow wheel 1, and the other end of the secondary string 3 penetrates the guide groove of the secondary wheel 9 of the second bow wheel 5 and is connected to the bow wheel bolt 12, and the secondary string is increased from one side to two on the single side, which are crossed on the same side and symmetrically arranged on both sides. The two ends will rotate synchronously with the wheel shaft, so that the secondary strings on both sides of the bow wheel are evenly stressed, avoiding the bow wheel from twisting, so that the bow wheel will not twist whether it is dynamic or static; it solves the problem of bow wheel twisting caused by different string lengths and different forces on both sides due to the pulling of the user.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A composite bow eccentric wheel assembly, comprising a first bow wheel (1) and a second bow wheel (5), Features: Four secondary chords (3) and two primary chords (4) are installed between the first bow wheel (1) and the second bow wheel (5); The first bow wheel (1) and the second bow wheel (5) have the same structure. The first bow wheel (1) and the second bow wheel (5) both comprise a bow wheel body, a string groove is provided on the edge of the bow wheel body, bow wheel bolts (12) are installed on both sides of the bow wheel body, auxiliary wheels (9) are installed on both sides of the bow wheel body, and a rotating shaft (6) is installed on the bow wheel body; One end of the two main chords (4) is along the chord groove of the first bow wheel (1) and fixed on the main chord bolt (7) of the first bow wheel (1), and the other end of the two main chords (4) is along the chord groove of the second bow wheel (5) and fixed on the main chord bolt (7) of the second bow wheel (5); One end of the auxiliary chord (3) is fixed to the auxiliary chord bolt (11) of the sleeve (10) of the rotating shaft (6) at the first bow wheel (1), and the other end of the auxiliary chord (3) is connected to the bow wheel bolt (12) along the guide groove of the auxiliary wheel (9) on the same side of the second bow wheel (5); One end of the other auxiliary chord (3) on the same side is fixed to the auxiliary chord bolt (11) of the sleeve (10) of the rotating shaft (6) at the second bow wheel (5), and the other end of the auxiliary chord (3) is connected to the bow wheel bolt (12) along the guide groove of the auxiliary wheel (9) on the same side of the first bow wheel (1).

2. The eccentric wheel assembly of a compound bow according to claim 1, Features: Connectors (8) are installed at both ends of the rotating shaft (6), and the connecting heads (8) are installed with bow pieces (2).

3. The eccentric wheel assembly of a compound bow according to claim 1, Features: Sleeves (10) are installed at both ends of the rotating shaft (6), and the sleeve (10) and the rotating shaft (6) are fixed via secondary chord bolts (11).

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