Bow and arrow wheel set auxiliary wheel double-hole positioning structure

Abstract

The utility model relates to the technical field of composite bows, in particular to a double-hole positioning structure for auxiliary wheels of a bow and arrow wheel set. Comprising an auxiliary wheel, a threaded hole is formed in the center of the end of the auxiliary wheel, a plurality of positioning holes are formed in the two sides of the threaded hole respectively, every two positioning holes opposite in position form a group, a limiting block is arranged on one side of the end of the auxiliary wheel, two positioning columns are arranged on one side of the limiting block, and the two positioning columns are inserted into one group of positioning holes. A fastening screw is arranged on the other side of the limiting block and penetrates through the limiting block to be connected with the threaded hole to fix the limiting block. On one hand, the positioning column can be inserted into different positioning holes according to needs, so that the mounting position of the limiting block is adjusted, the pulling distance can be adjusted, and the labor-saving ratio is adjusted; on the other hand, the two positioning columns and the fastening screws form a triangular mounting and fixing structure, the limiting block can be firmly fixed to the end of the auxiliary wheel, deflection and displacement of the limiting block when the limiting block abuts against the auxiliary chord are prevented, and the adjusting precision of the labor-saving ratio is ensured.

Description

Technical field:

[0001] The utility model relates to the technical field of compound bows, in particular to a double-hole positioning structure for a secondary wheel of a bow and arrow wheel set. Background technology:

[0002] The compound bow mainly includes components such as a bow handle, a bow piece, a wheel set and a bowstring. For example, the patent application with the announcement number CN219914169U discloses a short-wheelbase compound bow, in which the wheel set includes a main wheel and a secondary wheel, which are fixedly connected by screws, and a limiting column is provided on the secondary wheel, which cooperates with the secondary string of the bowstring. When the bow is pulled to the maximum draw distance, the limiting column and the secondary string are offset to limit the position, and the bowstring cannot be pulled further. However, the limiting column in the above patent is only fixed on the secondary wheel and cannot be displaced, and the draw distance cannot be adjusted, so that the labor saving ratio cannot be adjusted, and people's needs for different labor saving ratios cannot be met, which affects the application range and performance of bows and arrows.

[0003] In summary, how to adjust the position of the limit column on the secondary wheel to adjust the labor saving ratio has become a technical problem that urgently needs to be solved in the industry. Utility model content:

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a double-hole positioning structure for a secondary wheel of an arrow wheel assembly, which solves the problem that a limiting column is fixed on the secondary wheel and cannot be displaced, so that the labor saving ratio cannot be adjusted.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A double-hole positioning structure for an auxiliary wheel of an arrow wheel group comprises an auxiliary wheel, a threaded hole is provided at the center position of the end of the auxiliary wheel, a plurality of positioning holes are provided on both sides of the threaded hole, and the positioning holes at opposite positions are grouped in pairs, a limit block is provided on one side of the end of the auxiliary wheel, two positioning columns are provided on one side of the limit block, the two positioning columns are inserted into a group of positioning holes, a fastening screw is provided on the other side of the limit block, and the fastening screw passes through the limit block and is connected to the threaded hole to fix the limit block.

[0007] The position of each group of positioning holes on the limit block is provided with an arc groove, the arc groove is installed in cooperation with the outer circumference of the fastening screw, and a through hole is provided at the bottom of the arc groove, and the screw rod of the fastening screw passes through the through hole and is connected with the threaded hole.

[0008] The fastening screw is a hexagon socket screw.

[0009] One side of the limit block is provided with a protrusion matched with the secondary chord.

[0010] The diameter of the positioning hole is consistent with the diameter of the positioning column.

[0011] The utility model adopts the above scheme and has the following advantages:

[0012] By arranging threaded holes and several groups of positioning holes at the end of the secondary wheel, the positioning holes are installed in coordination with the two positioning posts of the limit block, and the fastening screws pass through the limit block and connect with the threaded holes to fix the limit block. On the one hand, the positioning posts can be inserted into different positioning holes as needed, so as to adjust the installation position of the limit block, and then the pulling distance can be adjusted to achieve the adjustment of the effort saving ratio; on the other hand, the two positioning posts and the fastening screws form a triangular installation and fixing structure, which can firmly fix the limit block at the end of the secondary wheel to prevent the limit block from deflecting and displacing when it abuts against the secondary chord, thereby ensuring the adjustment accuracy of the effort saving ratio. Description of the drawings:

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the auxiliary wheel of the utility model.

[0015] Figure 3 It is a front structural schematic diagram of the limit block of the utility model.

[0016] Figure 4 It is a rear structural schematic diagram of the limit block of the utility model.

[0017] In the figure, 1, secondary wheel, 2, threaded hole, 3, positioning hole, 4, limit block, 5, positioning column, 6, fastening screw, 7, arc groove, 8, through hole, 9, protrusion. Specific implementation method:

[0018] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0019] like Figure 1-4 As shown, a double-hole positioning structure of a secondary wheel of an arrow wheel group comprises a secondary wheel 1, a threaded hole 2 is provided at the center position of the end of the secondary wheel 1, a plurality of positioning holes 3 are provided on both sides of the threaded hole 2, and the positioning holes 3 at opposite positions are grouped in pairs, a limit block 4 is provided on one side of the end of the secondary wheel 1, two positioning columns 5 are provided on one side of the limit block 4, the two positioning columns 5 are inserted into a group of positioning holes 3, a fastening screw 6 is provided on the other side of the limit block 4, and the fastening screw 6 passes through the limit block 4 and is connected with the threaded hole 2 to fix the limit block 4.

[0020] The position of each group of positioning holes 3 on the limit block 4 is provided with an arc groove 7, which is installed in cooperation with the outer circumference of the fastening screw 6. A through hole 8 is provided at the bottom of the arc groove 7, and the screw of the fastening screw 6 passes through the through hole 8 and is connected with the threaded hole 2. When the positioning column 5 is inserted into one group of positioning holes 3, the fastening screw 6 can be inserted into the corresponding arc groove 7 and through hole 8 according to the position, and the installation is convenient and quick.

[0021] The fastening screw 6 is a hexagon socket screw.

[0022] A protrusion 9 matching with the secondary string is provided on one side of the limit block 4. When the bow is pulled to the maximum draw length, the protrusion 9 abuts against the secondary string for limiting.

[0023] The diameter of the positioning hole 3 is consistent with the diameter of the positioning post 5 , which can prevent the positioning post 5 from shaking after being inserted into the positioning hole 3 .

[0024] Working principle:

[0025] During installation, two positioning columns 5 are inserted into one of the positioning holes 3 according to the adjustment requirements of the labor saving ratio, and then the fastening screws 6 are inserted into the corresponding arc grooves 7 and through holes 8, and the fastening screws 6 are screwed to fix the limit block 4. By adjusting the installation position of the limit block 4, the pull distance can be adjusted to adjust the labor saving ratio. The two positioning columns 5 and the fastening screws 6 form a triangular installation and fixing structure, which can firmly fix the limit block 4 at the end of the secondary wheel 1, preventing the limit block 4 from deflecting and displacing when it contacts the secondary chord, and ensuring the adjustment accuracy of the labor saving ratio.

[0026] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0027] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A double-hole positioning structure for a secondary wheel of a bow and arrow wheel set, characterized in that: It includes a secondary wheel, a threaded hole is provided at the center position of the end of the secondary wheel, a number of positioning holes are provided on both sides of the threaded hole, and the positioning holes at opposite positions are grouped in pairs. A limit block is provided on one side of the end of the secondary wheel, two positioning columns are provided on one side of the limit block, and the two positioning columns are inserted into a group of positioning holes. A fastening screw is provided on the other side of the limit block, and the fastening screw passes through the limit block and is connected with the threaded hole to fix the limit block.

2. The double-hole positioning structure of the secondary wheel of the bow and arrow wheel set according to claim 1, characterized in that: The position of each group of positioning holes on the limit block is provided with an arc groove, the arc groove is installed in cooperation with the outer circumference of the fastening screw, and a through hole is provided at the bottom of the arc groove, and the screw rod of the fastening screw passes through the through hole and is connected with the threaded hole.

3. The double-hole positioning structure of the secondary wheel of the bow and arrow wheel set according to claim 1, characterized in that: The fastening screw is a hexagon socket screw.

4. The double-hole positioning structure of the secondary wheel of the bow and arrow wheel set according to claim 1, characterized in that: One side of the limit block is provided with a protrusion matched with the secondary chord.

5. The double-hole positioning structure of the secondary wheel of the bow and arrow wheel set according to claim 1, characterized in that: The diameter of the positioning hole is consistent with the diameter of the positioning column.

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