TWI689700B - Cross-bow bow string, wheel, shaft position proportional structure - Google Patents

Abstract

The invention discloses a proportional structure of crossbow bow string, wheel and shaft position. The crossbow bow is arranged at the front end of a crossbow body, and includes two pulley sets arranged at two free ends, and a main chord line and two pairs respectively connected to each pulley set Chord. Wherein, each pulley block includes a main shaft, a plurality of pallets set on the outer peripheral side of the main shaft, a set of main chords connected to the outer circumferential sides of each pallin, and a set of auxiliary chords arranged on the outer circumferential side of the main shaft. By the composition of the above components, the main chord and auxiliary chords are arranged along the main shaft at a preset proportional position to adjust the inclination angle of the main chord and each auxiliary chord when the main chord line is not wound or wound. Move the angle between each auxiliary string and each pulley block, and the gap between the main string and the crossbow.

Description

Cross-bow bow string, wheel, shaft position proportional structure

The invention relates to a technical field related to sports equipment, in particular to a proportional structure of crossbow bow string, wheel and shaft position.

The structure of the crossbow in the prior art generally consists of a crossbow body, a crossbow located laterally at the front of the crossbow body, and a bowstring connecting the two ends of the crossbow. For the detailed structure, please refer to my country Patent Announcement No. I582373.

The crossbow of the previous technique is laterally protruding from both sides of the crossbow body, and the extended length of the crossbow forms the lateral volume of the crossbow, which will cause great problems for users who carry the crossbow, especially in the woods or small spaces When moving inside, the horizontal crossbow can easily form obstacles or even restrict the movement of the user.

In order to overcome this deficiency, some practitioners have proposed the teaching of the structure of the multi-fold crossbow (as shown in Figures 21 to 23). In addition to maintaining the strength requirements of the original crossbow, the horizontal length of the crossbow can be greatly reduced to solve the previous skills. Crossbow bow is too large to be missing.

The structure of the multi-directional crossbow in the prior art generally includes a multi-directional crossbow 91, two pulley sets 92 pivoted at both ends of the multi-directional crossbow, a main string 94 connecting each pulley set 92 and crossing the crossbow 93 above, Two sub-strings 95 connected to each pulley block 92 and extending through the crossbow 93. Although the multi-bend crossbow structure referred to in the previous art can effectively improve the lack of crossbow length, other problems arise, such as: The above-mentioned pulley group 92 includes a wheel shaft 922 and a main chord 924 and a secondary chord 926 stacked coaxially, and it can be seen from the figure that the main chord 94 and the secondary chord 95 are respectively connected to the main chords of different diameters 924 and auxiliary chord 926, and the two ends of the axle 922 are pivoted at the end of the multi-directional crossbow 91, so the axle 922 needs to bear the main chord line 94 and the auxiliary chord line 95 (main chord 924 and auxiliary chord 926) The pulling force and the reaction force of the multi-fold crossbow 91.

In addition, the main string wheel 922 of the pulley group 92 at both ends of the multi-directional crossbow bow 91 is connected to the main string line 94 around it in a horizontal manner, and the main string line 94 is horizontally arranged above the crossbow body 93, and the auxiliary string line 95 In order to avoid disturbing the movement of the main string 94, it is arranged below the main string 94 and after passing through the crossbow 93, the auxiliary string 95 of each pulley block 92 is connected to the main string 94 at an oblique angle θ.

It is not difficult to see from the prior art structure revealed in Figure 22 that the main string 94 exerts a horizontal (approaching) pulling force on the axle 922 through the main string 924 when it is wound or not, and the auxiliary string 95 At an oblique angle θ relative to the main chord line 94, the horizontally pivoted auxiliary chord 926 is connected, and a pulling force at an oblique angle θ is applied to the axle 922 through the auxiliary chord 926 when winding and unwinding.

It is not difficult to find from the description of the previous techniques above that the main string 94 and the auxiliary string 95 both exert force on the axle 922, but the two have different diameters and directions of force due to the difference between the main chord 924 and the auxiliary chord 926. As a result, the axial force of the axle 922 will also be different, causing the main chord 924 in the upper section of the axle 922 to be radially inclined to the side of the crossbow 93, and when this phenomenon occurs, it will cause the main The string 94 is pressed against the top face of the crossbow body 93. In severe cases, it will form a pressure. This phenomenon will result in the following defects:

1 The main string 94 cannot completely transmit the energy accumulated in the multi-fold to the crossbow 91, resulting in a waste of energy.

2. The main string 94 and the crossbow 93 form a strong friction, and the light will cause the main The wear of the string 94 seriously causes the main string 94 to suddenly break, and this sudden breaking phenomenon will only be inevitable (time sooner or later).

3. When the main string 94 is excessively in contact with the crossbow body 93 (as shown in Figure 24), the position of the axis of the main string 94 will be lower than the position of the axis of the arrow body 96, resulting in the force of the main string 94 When the arrow body 96 is pushed, the arrow body 96 will be pushed eccentrically, causing the flight path of the arrow body 96 to fail.

4. On the contrary, when the main chord 94 and the crossbow 93 are too far away (the gap is large) (as shown in Figure 25), the main chord 94's axis will be higher than the arrow 96's axial position, and the missing is the same as above No further description; the deviation from the main string line 94 that is too high may even cross the outline height of the arrow body 96, resulting in the phenomenon of empty string firing (ie, no arrow firing).

Therefore, how to automatically adjust or maintain the main string 94 at the preset position while winding is necessary to improve and overcome it.

In view of the above-mentioned problems and deficiencies of the prior art, the main purpose of the present invention is to provide a proportional structure of crossbow bowstring, wheel, and shaft position. Through the structural design, the above-mentioned deficiencies of the previous art are solved.

According to the above object of the present invention, the present invention proposes a proportional structure for the position of the string, wheel and shaft of a crossbow, which is set at the front end of a crossbow body, and includes two pulley sets at two free ends, and one main unit respectively connected to each pulley set String and two pairs of strings. Wherein, each pulley block includes a main shaft, a plurality of pallets set on the outer peripheral side of the main shaft, a set of main chords connected to the outer circumferential sides of the palings, and a set of auxiliary chords arranged on the outer circumferential side of the main shaft. By the composition of the above components, the main chord and auxiliary chords are arranged along the main shaft at a preset proportional position to adjust the inclination angle of the main chord and each auxiliary chord when the main chord line is not wound or wound. Move each auxiliary string and each pulley block The angle of connection and the gap between the main string and the crossbow.

10: Crossbow

11: trigger

12: Arrow Groove

13: Grooving

20: Crossbow

21: Crossbow wings

22: Arch arm group

212: Slot

222: upper arm

224: Lower Arch Arm

226: Jaw

2222, 2242: Arch arm pivot hole

30: pulley block

31: Spindle

322: Wing

33: Palin

34: Main chord

341: Main chord groove

342: Main chord port

343: main string pivot post

344: Main chord adjustment slot

345: threaded column

3452: Spiral guide groove

346: Vice chord steering column

347: Substring pivot post

348: Main axle hole

35: Vice chord

351: Vice chord

352: sleeve shaft

354: Vice chord shaft

356: Extension arm

362, 364: bushing

37: C buckle

40: main string

52, 54: Vice string

60: Slider

<prior art>

91: Multi-fold crossbow

92: pulley block

922: Axle

924: Main chord wheel

926: Vice chord

93: Crossbow

94: main string

95: Substring

96: Arrow

θ: oblique angle

AL: attitude baseline

Figure 1 is a perspective schematic view of an embodiment of the present invention.

Figure 2 is a partial schematic view of the embodiment shown in Figure 1.

Figure 3 is a schematic diagram of another embodiment of the embodiment shown in Figure 2.

Figure 4 is a schematic diagram of another embodiment of the embodiment shown in Figure 2. .

Figure 5 is a schematic partial cross-sectional view of the embodiment shown in Figure 2.

Figure 6 is an exploded view of the partial components of the embodiment shown in Figure 2.

Figure 7 is an exploded view of the partial components of the embodiment shown in Figure 6.

Figure 8 is a schematic diagram of some components of the embodiment shown in Figure 7.

Figure 9 is a schematic diagram of another embodiment of the embodiment shown in Figure 8.

Figure 10 is a schematic diagram of the implementation shown in Figure 5.

Figure 11 is a schematic diagram of a statistical curve according to an embodiment of the present invention.

Figure 12 is a schematic diagram of the operation of the embodiment of the present invention (1).

Figure 13 is a partial schematic view of the embodiment shown in Figure 12.

Figure 14 is a schematic diagram of the operation of the embodiment of the present invention (2).

Figure 15 is a schematic diagram of another embodiment of the embodiment shown in Figure 14.

Figure 16 is a schematic diagram of action of the embodiment of the present invention (3).

Figure 17 is a partial schematic view of the embodiment shown in Figure 16.

Figure 18 is a schematic diagram of another embodiment of the secondary chord of the present invention.

Figure 19 is a schematic diagram of another perspective of the partial components of the embodiment shown in Figure 18.

Figure 20 is an exploded view of the partial components of the embodiment shown in Figure 19.

Figure 21 is a schematic diagram of the crossbow of the previous technique.

Figure 22 is a schematic diagram of the crossbow action of the previous technique (1).

Figure 23 is a schematic diagram of the crossbow action of the previous technique (2).

Figure 24 is a schematic diagram of the crossbow action of the previous technique (3).

Figure 25 is a schematic diagram of the crossbow action of the previous technique (4).

In the following, please refer to the related drawings to further explain the embodiment of the proportional structure of the string, wheel, and shaft of the crossbow of the present invention.

Please refer to Figures 1 to 9, the proportional structure of the strings, wheels, and shafts of the crossbow of the present invention includes a crossbow 20 provided on the crossbow body 10, two pulley blocks 30, a main string 40, and two pairs of strings 52 、54和一个滑器60。 54, a slider 60.

For the crossbow body 10 described above, please refer to Figures 1 to 2 (prior art), it has a trigger 11 provided at the preset position of the downward facing end face of the crossbow body 10, an arrow slot 12 provided at the top face of the crossbow body 10, a The cut groove 13 formed by the crossbow body 10 penetrates laterally.

The aforementioned crossbow 20, as shown in Figs. 1, 2 and 6, is arranged laterally at the front section of the crossbow body 10, and includes a crossbow wing 21 and two bow arm groups 22. The crossbow wings 21 are horizontally arranged at the front end of the crossbow body 10, and have a slot 212 at each end. Each of the bow arm groups 22 is composed of upper and lower bow arms 222 and 224, and the same ends of the upper and lower bow arms 222 and 224 are respectively inserted into the slots 212, and the other end is arranged along the extending direction of the crossbow body 10 , And defines a pinch 226 and upper and lower concentrically formed arch arm pivot holes 2222, 2242. In the implementation, the length of the crossbow body 10 of the crossbow 20 is reduced by the arm group 22, and the overall transverse product of the crossbow is greatly contracted.

The above-mentioned pulley blocks 30, as shown in Figures 5 to 9, are located at the two ends of the crossbow 20, including a main shaft 31, a plurality of Palin 33, a main chord 34, A pair of chord wheels 35, plural bushes 362 (364), and plural C buckles 37.

Two ends of the main shaft 31 are pivotally connected to the arm pivot holes 2222 and 2242 of the upper and lower bow arms 222 and 224, respectively.

The main chord 34 is disposed on the outer peripheral side of the Palin 33, and has a main chord groove 341, a main chord port 342, a main chord pivot post 343, a main chord adjustment groove 344, and a threaded post 345 , A pair of chord steering column 346, a pair of chord pivoting column 347 and a main axle hole 348.

The aforementioned main chord groove 341 is recessed along the radial outer circumferential surface of the main chord 34.

The main chord port 342 is formed at a predetermined position through the main chord wheel 34, and the lateral opening faces the crossbow body 10.

The aforementioned main chord pivoting post 343 is formed by the main chord 34 extending upward at a predetermined position on the upper end surface, and is matched with the position of the main chord port 342. Compared with the auxiliary chord steering column 346, the front end of the crossbow body 10 is located on the upper side 1. Inside the lower arch arms 222, 224 (approaching 10 sides of the crossbow body).

The aforementioned main string adjusting groove 344 is formed in the main string wheel 34 by being recessed around the main string pivoting post 343.

The aforementioned threaded column 345 is formed by the downward extension of the main chord 34. The outer peripheral surface of the threaded column 345 has a spiral guide groove 3452 formed by recessing upward and downward, and the entrance of the spiral guide groove 3452 matches the position of the auxiliary chord steering column 346.

The aforementioned auxiliary chord steering column 346 and auxiliary chord pivoting post 347 are respectively formed by the main chord 34 extending downward at a predetermined position on the lower end surface, different from the main chord pivoting post 343 formed at the other end of the main chord 34, Adjacent to the radially outer end of the main chord 34, and located on both sides of the extension direction of the upper and lower bow arms 222, 224 respectively (the auxiliary chord steering column 346 is on the outer side, and the auxiliary chord pivot column 347 is on the inner side adjacent to the crossbow body 10 side ).

The aforementioned main wheel shaft hole 348 is eccentric and penetrates the main chord wheel 34 from top to bottom Formed and provided with a Peeling 33 accommodation, with the main shaft 31 extending and pivoting, the main chord wheel 34 is pivoted at the jaw 226 of the bow arm group 22.

The auxiliary chord 35 is sleeved on the outer peripheral side of the main shaft 31 and is disposed on the downward end surface of the screw column 345.

The respective bearings 33 are sleeved on the outer peripheral side of the main shaft 31 and accommodated in the main wheel shaft hole 348 of the main chord 34 to provide the main shaft 31 to extend. In practice, each of the preset ends of the Palin 33 extends radially outward with a wing portion 332 for buckling against the top (bottom) end surface of the main chord 34.

The bushes 362 and 364 are sleeved on the outer peripheral side of the main shaft 31 to adjust the position of the nip 226 of the bow arm group 22 of the main chord 34 and the auxiliary chord 35.

The C buckles 37 (prior art) are sleeved on the outer peripheral sides of both ends of the main shaft 31 and contact with the arm group 22, and restrain the pulley group 30 on the arm group 22.

The main string 40 (prior art) has two ends connected to the main string pivot posts 343 of each main string wheel 34, and the other end passes through the main string port 342 and then goes toward the auxiliary string steering column 346 along the main string wheel. After the groove 341 wraps around the outer peripheral side of the main chord wheel 34, it crosses over the crossbow body 10 at right angles. In practice, the position of the main string 40 extending through the main string port 342 is matched with the main string wheel slot 341 by matching the main string adjusting groove 344 (to avoid high and low drop).

Each of the above-mentioned auxiliary strings 52 and 54 (prior art) has one end connected to the auxiliary string pivot post 347 of the preset main string wheel 34, and the other end is first turned around the auxiliary string steering column 346 before passing through the threaded column 345 After the spiral guide groove 3452 (entrance end) and the split groove 13 of the crossbow body 10, the end is pivotally connected to the auxiliary chord 35 of another pulley block 30.

The above-mentioned slider 60, as shown in FIG. 2 (prior art), is accommodated in the crossbow body 10 and separates the contact between the auxiliary strings 52 and 54 and the crossbow body 10.

Please refer to Figures 10 and 11, the central axis extending horizontally from the exit end of the spiral guide groove 3452 is the posture baseline AL (parallel to the main chord line 40); first, we regard the horizontal position of the posture baseline AL as 0 Degree, when it is displaced upward, it is regarded as a positive angle; when it is displaced downward, it is regarded as a negative angle.

When the main string 40 and the auxiliary strings 52 and 54 are respectively connected to the main string 34 and the auxiliary string 35 of each pulley group 30, when the string is not wound, the posture baseline AL near the end of the crossbow body 10 will be downward (negative angle ) Tilt (in an embodiment, the size of the negative angle can be changed by means of adjustment). However, when the main string 40 (secondary strings 52, 54) is pulled to the winding position, the tension of the main string 40 (secondary strings 52, 54) interlocks each pulley group 30, so that the attitude baseline AL is close to the crossbow body 10 The end will tilt upward (positive angle).

The above-mentioned posture baseline AL is adjacent to the angle of the up and down inclination of the crossbow body 10. Due to the difference in the position of the auxiliary chord wheel 35 along the main shaft 31 from the bottom end of the threaded post 345, in the unwinding and winding states, they exhibit different positive and negative angles, respectively The change is shown in FIG. 11; the horizontal axis is the position of the upward and downward position of the attitude baseline AL along the main axis 31, and the coordinate axis is the angle change of the upward and downward inclination of the attitude baseline AL near the end of the crossbow 10. From the above changes, it can be seen that the position baseline AL along the main axis 31 is preferably between the first and second points; therefore, it will be converted into the structural proportion of the invention, namely: The total width of the jaws 226 of the bow arm group 22 is A, and the distance between the outlet end of the spiral guide groove 3452 and the upper bow arm 222 (bottom end) of the threaded post 345 is B, and the minimum outer diameter of the auxiliary chord 35 and the lower bow The distance between the arms 224 (top) is C; then the total width A of the jaws is preferably 1.7 to 3 times the distance C between the auxiliary chord 35 and the lower bow 224, and the exit end of the spiral guide groove 3452 and the upper bow 222 It is better if the spacing B is less than one-half the total width A of the jaws but not 0.

Therefore, the above is an introduction to the components and assembly methods of the proportional structure of the crossbow bow, wheel, and shaft in a preferred embodiment provided by the present invention. The operating characteristics of the embodiment of the present invention are introduced as follows.

Please refer to figures 12 to 17, under normal conditions, the main string 40 and the auxiliary string 52 (54) exert low tension on each arm group 22, and through the structural rigidity of Palin 33, the protection of the main shaft can be effectively achieved 31 needs.

Under normal conditions, as shown in Figures 12 and 13, each auxiliary chord 52, 54 passes along the entrance of the spiral guide groove 3452 of the threaded post 345. As shown in Figs. 14 to 17, when the main string 40 is pulled and wound, the main string 34 of each pulley group 30 will be synchronously connected, and the auxiliary string 52, 54 along the spiral guide groove of the threaded column 345 will be retracted at the same time. 3452 is filled in, and the downward extension of the spiral guide groove 3452 gradually moves the sub-strings 52, 54 into the position of the spiral guide groove 3452, so that the sub-strings 52, 54 are in the pulley block 30 and the crossbow 10 The angle between them is reduced to avoid the lack of excessive angles of the auxiliary strings 52 and 54.

In addition, through the structural design of the above proportional position, the lack of deviation of the main chord line 40 from the preset height of the crossbow body 10 is overcome.

Please refer to FIGS. 18-20, which is another embodiment of the auxiliary chord 351 of the present invention, which includes an integral sleeve shaft 352, a auxiliary chord shaft 354, and an extension arm 356 connecting the two. The extension arm 356 eccentrically rotates the auxiliary chord shaft 354 of the auxiliary chords 52 and 54 and has an open end to facilitate the direct assembly of the auxiliary chords 52 and 54.

The above descriptions are only preferred embodiments of the present invention, and are intended to clarify the features of the present invention, not to limit the scope of the embodiments of the present invention, and the average changes made by those skilled in the art according to the present invention , As well as changes well known to those skilled in the art, should still fall within the scope of the present invention.

10‧‧‧ Crossbow

11‧‧‧ trigger

12‧‧‧Arrow

13‧‧‧Ditch

20‧‧‧ Crossbow

21‧‧‧ Crossbow wings

22‧‧‧bow arm set

222‧‧‧Upper arm

224‧‧‧Lower arm

226‧‧‧jaw

30‧‧‧Pulley

40‧‧‧Main string

52, 54‧‧‧ auxiliary string

Claims (5)

A cross-bow bow string, wheel, and shaft position proportional structure, which includes: a crossbow, which is transverse to the front end of a crossbow body, including a crossbow wing and two bow arm groups; the crossbow wing, the lock is set on the crossbow body and two Each end has a slot; each of the arch arm groups is composed of an upper and a lower arch arm, the same end is inserted into the slot, and the other end is arranged along the extending direction of the crossbow body, and a jaw is defined; The two pulley blocks are respectively pivotally arranged at the two ends of the crossbow and accommodated in the jaws, including a main shaft, a plurality of Palin, a main chord wheel, and a pair of chord wheels; the main shaft is pivotally arranged on the The same end of the lower arch arm; each of the bearing is sleeved on the outer peripheral side of the main shaft; the main chord wheel is arranged on the outer peripheral side of the bearing, with a main formed along the radial outer circumferential surface of the main chord The chord groove, a side opening facing the crossbow body to form the main chord port of the main chord wheel side, a main chord pivot post formed on the main chord wheel matching the position of the main chord port, a self A threaded column extending downward from the main chord wheel, and a spiral guide groove on the outer peripheral surface, two auxiliary chord steering columns and auxiliary chord pivot columns formed on the downward end of the main chord wheel, and an eccentric and penetrating main chord The main wheel shaft hole formed by the wheel provides each bearing accommodation and the main shaft penetration; and the auxiliary chord wheel is sleeved on the outer peripheral side of the main shaft and is arranged on the downward end of the threaded column; a main chord line, two Connect the main chord wheel of each pulley block at the end; Two pairs of chords are connected at both ends and around the pair of chords matching the pulley block; wherein, the total width of the jaw (A) is 1.7 to 1.7 to the distance (C) between the chord and the lower bow arm 3 times, and the distance (B) between the outlet end of the spiral guide groove and the upper arch arm (bottom end) is less than or equal to half of the total width (A) of the jaw and is not 0. As stated in item 1 of the patent application, the position structure of the crossbow chord, wheel and shaft position, wherein the secondary chord wheel includes a set of shafts, an extension arm and a secondary chord shaft formed in sequence, wherein the shaft sleeve On the outer peripheral side of the main shaft, the auxiliary chord shaft is provided for matching each auxiliary chord line. The proportional structure of the position of the string, wheel and shaft of the crossbow as described in item 1 or 2 of the patent application scope, wherein the main string wheel further has a main string adjustment groove formed in the main string wheel recessed along the main string pivot post . The proportional structure of the position of the chord, wheel, and shaft of the crossbow as described in item 1 or 2 of the scope of the patent application, wherein each of the preset ends of the Palin has a wing extending radially outward. The positional structure of the chord, wheel, and shaft of the crossbow as described in item 1 or 2 of the patent application scope, wherein each of the pulley blocks further includes a plurality of bushes respectively sleeved on the outer peripheral side of the main shaft.

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