Composite bow piece steel sleeve locking structure

Abstract

The utility model relates to the technical field of composite bows, in particular to a bow piece steel sleeve locking structure of a composite bow. Comprising a wheel set installed on a central shaft, bow pieces are installed on the central shaft on the two sides of the wheel set, steel sleeves are arranged between the two bow pieces and the central shaft respectively, the two steel sleeves are symmetrically arranged, the ends, close to the wheel set, of the steel sleeves are provided with outer limiting steps matched with the bow pieces, and the ends, away from the wheel set, of the steel sleeves are provided with inner limiting steps matched with the central shaft. Locking screws are arranged at the two ends of the center shaft respectively. The locking screw is screwed, the screw head of the locking screw is matched with the outer limiting step to clamp and fix the bow piece, meanwhile, the screw rod of the locking screw is matched with the inner thread groove, and the inner limiting step is matched with the outer end of the center shaft to lock and fix the steel sleeve, so that the bow piece is locked and fixed, the left-right shaking gap of the bow piece is eliminated, and the service life of the bow piece is prolonged. The assembly tolerance of the bow is effectively controlled, the bow pieces can be assembled in an almost tolerance-free state during mass production, and the overall performance of the bow is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of compound bows, in particular to a compound bow bow piece steel sleeve locking structure. Background technology:

[0002] The compound bow mainly includes the bow handle, bow limbs, wheel set and bowstring. Figure 3 As shown, the wheel set 2 is installed in the middle of the central axis through a bearing, and two bow pieces 3 are sleeved on the central axis on both sides of the wheel set. Elastic retaining rings 9 are respectively provided on the central axis outside the two bow pieces 3 to limit the position of the two bow pieces 3. In this limiting mode of elastic retaining rings, although gaskets are provided between the end faces on both sides of the wheel set and the bow pieces for filling, there is still a gap between the wheel set and the two bow pieces. The elastic retaining ring can only play a limiting role, and cannot completely lock the wheel set and the two bow pieces. There is a shaking gap between the bow pieces on the left and right, and the assembly tolerance of the bow cannot be effectively controlled, which affects the overall performance of the bow.

[0003] In summary, the assembly tolerance problem of compound bow limbs has become a technical problem that needs to be solved urgently in the industry. Utility model content:

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a compound bow limb steel sleeve locking structure, which solves the problem that the limbs of the compound bow have left and right shaking gaps after being limited by elastic retaining rings and the assembly tolerance cannot be effectively controlled.

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

[0006] A compound bow bow piece steel sleeve locking structure comprises a wheel set installed on a central axis, bow pieces are installed on the central axis on both sides of the wheel set, steel sleeves are respectively provided between the two bow pieces and the central axis, the two steel sleeves are symmetrically arranged, an outer limiting step matching with the bow piece is provided at one end of the steel sleeve close to the wheel set, an inner limiting step matching with the central axis is provided at one end of the steel sleeve away from the wheel set, and locking screws are respectively provided at both ends of the central axis.

[0007] Internal thread grooves are respectively arranged at both ends of the central shaft, and the screw rod of the locking screw is threadedly connected with the internal thread grooves.

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

[0009] The screw head of the locking screw abuts against the outer side of the bow piece.

[0010] The outer limiting step abuts against the inner side of the bow piece.

[0011] The inner limit step abuts against the outer end of the central shaft.

[0012] The central shaft and the steel sleeve are clearance-matched.

[0013] The bow piece and the steel sleeve are clearance-matched.

[0014] The utility model adopts the above scheme and has the following advantages:

[0015] By arranging a steel sleeve between the bow piece and the center axis, an outer limit step cooperating with the bow piece is provided at one end of the steel sleeve close to the wheel group, and an inner limit step cooperating with the center axis is provided at one end of the steel sleeve away from the wheel group. By screwing the locking screw, the screw head of the locking screw cooperates with the outer limit step to clamp the bow piece, and at the same time, the screw rod of the locking screw cooperates with the internal thread groove, and the inner limit step cooperates with the outer end of the center axis to lock and fix the steel sleeve, thereby locking and fixing the bow piece, eliminating the gap between the bow piece and the left and right shaking, and effectively controlling the assembly tolerance of the bow. During mass production, the bow piece can be assembled in an almost tolerance-free state, thereby improving the overall performance of the bow. Description of the drawings:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the central shaft and the steel sleeve of the utility model.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the prior art.

[0019] In the figure, 1, center axis, 2, wheel assembly, 3, bow piece, 4, steel sleeve, 5, outer limit step, 6, inner limit step, 7, locking screw, 8, internal thread groove, 9, elastic retaining ring. Specific implementation method:

[0020] 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.

[0021] like Figure 1-2 As shown, a compound bow bow piece steel sleeve locking structure includes a wheel set 2 installed on a central axis 1, bow pieces 3 are installed on the central axis 1 on both sides of the wheel set 2, steel sleeves 4 are respectively provided between the two bow pieces 3 and the central axis 1, and the two steel sleeves 4 are symmetrically arranged, and an outer limiting step 5 matching with the bow piece 3 is provided at one end of the steel sleeve 4 close to the wheel set 2, and an inner limiting step 6 matching with the central axis 1 is provided at one end of the steel sleeve 4 away from the wheel set 2, and locking screws 7 are respectively provided at both ends of the central axis 1.

[0022] Internal thread grooves 8 are respectively provided at both ends of the central shaft 1 , and the screw rod of the locking screw 7 is threadedly connected to the internal thread grooves 8 .

[0023] The locking screw 7 is a hexagon socket screw, which is convenient for screwing and locking.

[0024] The screw head of the locking screw 7 abuts against the outer side of the bow piece 3, and the outer limiting step 5 abuts against the inner side of the bow piece 3. The screw head of the locking screw 7 cooperates with the outer limiting step 5 to clamp and fix the bow piece 3.

[0025] The inner limit step 6 abuts against the outer end of the central shaft 1 , and when the locking screw 7 is screwed into the internal thread groove 8 , the inner limit step 6 cooperates with the outer end of the central shaft 1 to lock and fix the steel sleeve 4 .

[0026] The central axis 1 and the steel sleeve 4 are clearance-matched, and the bow piece 3 and the steel sleeve 4 are clearance-matched, so as to facilitate assembly.

[0027] Working principle:

[0028] During assembly, first install the wheel set 2 on the middle part of the central axis 1, then install the steel sleeve 4 on the outside of the two ends of the central axis 1, and then install the bow piece 3 on the outside of the steel sleeve 4, and then screw the screw of the locking screw 7 into the internal thread groove 8. As the locking screw 7 is tightened, the screw head of the locking screw 7 pushes the bow piece 3, and the bow piece 3 pushes the outer limit step 5 to move. The outer limit step 5 moves synchronously with the steel sleeve 4 and the inner limit step 6. As the locking screw 7 is tightened deeper, the screw head of the locking screw 7 cooperates with the outer limit step 5 to clamp the bow piece 3, and the inner limit step 6 cooperates with the outer end of the central axis 1 to lock and fix the steel sleeve 4, thereby locking and fixing the bow piece 3, eliminating the left and right shaking gap of the bow piece 3, and effectively controlling the assembly tolerance of the bow.

[0029] 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.

[0030] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A compound bow limb steel sleeve locking structure, comprising a wheel set mounted on a central axis, with limbs mounted on the central axis on both sides of the wheel set, characterized in that: Steel sleeves are respectively provided between the two bow pieces and the central axis. The two steel sleeves are symmetrically arranged. An outer limit step matching with the bow piece is provided at one end of the steel sleeve close to the wheel set, and an inner limit step matching with the central axis is provided at one end of the steel sleeve away from the wheel set. Locking screws are respectively provided at both ends of the central axis.

2. A compound bow limb steel sleeve locking structure according to claim 1, characterized in that: Internal thread grooves are respectively arranged at both ends of the central shaft, and the screw rod of the locking screw is threadedly connected with the internal thread grooves.

3. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The locking screw is a hexagon socket screw.

4. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The screw head of the locking screw abuts against the outer side of the bow piece.

5. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The outer limiting step abuts against the inner side of the bow piece.

6. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The inner limit step abuts against the outer end of the central shaft.

7. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The central shaft and the steel sleeve are clearance-matched.

8. The compound bow limb steel sleeve locking structure according to claim 1, characterized in that: The bow piece and the steel sleeve are clearance-matched.

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