Football high and low temperature aging detection device

Abstract

The invention discloses a football high and low temperature aging detection device, and relates to the technical field of football detection, the football high and low temperature aging detection device comprises a bottom plate, the upper side of the bottom plate is fixedly connected with a detection box body and a fixing frame, the upper side of the bottom plate is provided with a detection unit, and the detection unit is used for simulating an impact and extreme temperature composite environment. A base is fixedly connected to the middle of the upper side of the bottom plate, a football body is arranged on the upper side of the base, a hydraulic cylinder is fixedly connected to the upper side of the fixing frame, and a pressing plate is fixedly connected to the output end of the lower side of the hydraulic cylinder. According to the football high and low temperature aging detection device, through cooperation of the bottom plate, the detection box body, the base and the pressing plate, a football can be stably limited, through linkage of a sliding hole, a movable plate, a connecting rod, impact blocks and a cam, the impact blocks on the left side and the right side are driven by a motor to repeatedly impact the football, and composite environment simulation of the impact effect and the extreme temperature is achieved; the detection condition is closer to the actual football use scene, and the authenticity of the detection result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of football detection, in particular to a high and low temperature aging detection device for football. Background Art

[0002] Football is a globally popular team sport. Two teams of 11 players each compete on a rectangular field. The goal is to kick the ball into the opponent's goal to score. During football production, high and low temperature aging testing equipment is required to test the footballs.

[0003] After searching, the Chinese patent with application number "CN202222069101.7" is specifically a high and low temperature aging detection device for football, including a device body, the interior of the device body is fixedly connected to a fixed plate, the top of the fixed plate is fixedly connected to three sliding mechanisms, the top of the fixed plate is movably connected to the football body, the top of the fixed plate is movably connected to the fixing mechanism, the internal thread of the fixing mechanism is connected to a screw, the top of the screw is fixedly connected to a rotating rod, and the top of the fixed plate is movably connected to an electric rotating wheel group; the sliding mechanism includes a rotating shaft, a ball wheel and a connecting block.

[0004] In the above patent, the football is tested after being limited, but the testing process does not simulate the actual usage scenario. During the game, the football will experience a cycle of "impact (kick, collision) - extreme temperature (exposure to the sun or low temperature in the rain) - impact again". Multiple impacts will cause the molecular chains of the rubber liner to break and the sealing of the valve to decrease, and the high temperature environment will accelerate the penetration of gas through the gap. The existing detection device cannot truly simulate the complex working conditions of the superposition of impact and extreme temperature, resulting in deviations between the test results and the actual performance. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a high and low temperature aging detection device for a football, which solves the problem of low authenticity of high and low temperature aging detection of a football.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A high and low temperature aging detection device for a football comprises a base plate, a detection box and a fixing frame being fixedly connected to the upper side of the base plate, a detection unit being provided on the upper side of the base plate, and the detection unit being used to simulate a composite environment of impact and extreme temperature, a base being fixedly connected to the middle portion of the upper side of the base plate, a football body being provided on the upper side of the base, a hydraulic cylinder being fixedly connected to the upper side of the fixing frame, a pressure plate being fixedly connected to the lower output end of the hydraulic cylinder, and a support box being fixedly connected to the lower side of the base plate, the detection unit comprising two sliding holes, both of which are opened on the upper side of the base plate, an impact assembly being provided on the upper side of the base plate and on the left and right sides of the football body, and the impact assembly performing periodic impact detection on the football body.

[0008] Preferably, the impact assembly includes a slider 1, which is slidably connected to the inner side of the sliding hole, and the upper sides of the two sliders 1 are fixedly connected to a movable plate, and the side of the movable plate close to the football body is fixedly connected to a connecting rod, and the outer end of the connecting rod is fixedly connected to an impact block.

[0009] Preferably, the lower sides of the two sliders are fixedly connected to a bottom block, the outer sides of the two bottom blocks are rotatably connected to an inclined plate 1, the outer side of the inclined plate 1 is rotatably connected to a rotating block 1, the lower side of the rotating block 1 is fixedly connected to a lifting block, the lower side of the lifting block is fixedly connected to a contact block, the inner wall of the support box is fixedly connected to two fixed blocks, a control rod is rotatably connected between the two fixed blocks, a cam is fixedly connected to the outer side of the control rod, a telescopic rod and a spring are fixedly connected between the lifting block and the bottom plate, and the front side of the fixed block is fixedly connected to a motor that drives the control rod to rotate.

[0010] Preferably, a reinforcement assembly is provided on the outer side of the impact block, and the reinforcement assembly includes four side blocks, the side blocks are fixedly connected to the front and rear sides of the impact block, a rotating rod is rotatably connected between the two side blocks on the same side, a swing plate is fixedly connected to the outer side of the swing rod, and a knocking block is fixedly connected to the side of the swing plate close to the football body.

[0011] Preferably, the upper ends of the rotating rods on the front and rear sides pass through the upper sides of the side blocks and are fixedly connected to the top plate, the upper side of the impact block is rotatably connected to the rotating shaft, and a movable groove is provided on the upper side of the impact block and on the front and rear sides of the rotating shaft, the inner side of the movable groove is slidably connected to the moving block, the upper side of the moving block is rotatably connected to the control block, the control block is rotatably connected to the top plate, the upper end of the rotating shaft is fixedly connected to a turntable, and the outer side of the turntable is fixedly connected to two rotating blocks 2, the upper side of the rotating block 2 is rotatably connected to an inclined plate 2, and the inclined plate 2 is rotatably connected to the moving block.

[0012] Preferably, the outer side of the rotating shaft is fixedly connected to a gear part, a sliding groove is provided on the upper side of the impact block, the inner side of the sliding groove is slidably connected to a slider 2, the upper side of the slider 2 is fixedly connected to a connecting block, the upper side of the connecting block is fixedly connected to a tooth plate meshing with the gear part, the upper side of the bottom plate is fixedly connected to a vertical plate, and a connecting plate is fixedly connected between the vertical plate and the tooth plate.

[0013] Preferably, the front and rear sides of the impact block are fixedly connected with L-shaped plates, the outer sides of the L-shaped plates on the front and rear sides are rotatably connected with swing rods, the end of the swing rod close to the impact block is fixedly connected with bevel gear 2, the middle part of the rotating rod is fixedly connected with bevel gear 1 meshing with bevel gear 2, the other end of the swing rod is fixedly connected with a swing arm, and the side of the swing arm close to the football body is fixedly connected with a friction block.

[0014] The present invention provides a high and low temperature aging detection device for soccer balls. Compared with the prior art, it has the following advantages:

[0015] (1) The high and low temperature aging test device for football can firmly limit the position of football through the cooperation of bottom plate, test box, base and pressure plate. And through the linkage of sliding hole, moving plate, connecting rod, impact block and cam, the motor drives the impact blocks on the left and right sides to repeatedly impact the football, realizing the composite environment simulation of impact and extreme temperature, making the test conditions closer to the actual use scenario of football and improving the authenticity of the test results.

[0016] (2) The high and low temperature aging detection device for footballs can drive the front and rear knocking blocks to exert lateral impact force on the football simultaneously through the coordinated action of the impact block, side block, rotating rod, knocking block, rotating shaft, gear part, tooth plate and connecting plate. This device can realize multi-angle composite impact on the front and side, more comprehensively simulate the different directions of force on the football during the game, and enhance the impact detection effect.

[0017] (3) The high and low temperature aging detection device for footballs is linked by an L-shaped plate, a swing rod, a swing arm and a friction block. When the impact block hits the football, it can simultaneously drive the friction blocks on the front and rear sides to swing repeatedly and rub against the surface of the football, accurately simulating the friction loss scenario when the football contacts the ground and the player's body during the game, thereby improving the comprehensiveness of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall three-dimensional structural diagram of the present invention;

[0019] Figure 2 3D diagram of the detection unit in the present invention;

[0020] Figure 3 It is a partial three-dimensional structural diagram of the detection unit in the present invention;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 It is a partial three-dimensional structural diagram of the reinforcement component of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0024] Figure 7 is a three-dimensional structural diagram of the reinforcement component of the present invention;

[0025] Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0026] In the figure: 1. bottom plate; 2. detection box; 3. support box; 4. base; 5. football body; 6. detection unit; 7. fixed frame; 8. hydraulic cylinder; 9. pressure plate; 61. fixed block; 62. motor; 63. slide hole; 64. vertical plate; 65. impact assembly; 66. reinforcement assembly; 651. slider 1; 652. moving plate; 653. connecting rod; 654. impact block; 655. bottom block; 656. inclined plate 1; 657. rotating block 1; 658. lifting block; 659. contact block; 6510. control rod; 6511. cam; 6512. telescopic rod; 6513. spring ;661, side block;662, rotating rod;663, swing plate;664, knocking block;665, top plate;666, moving groove;667, moving block;668, control block;669, rotating shaft;6610, turntable;6611, rotating block 2;6612, inclined plate 2;6613, gear part;6614, tooth plate;6615, slide groove;6616, slider 2;6617, connecting block;6618, connecting plate;6619, bevel gear 1;6620, L-shaped plate;6621, swing rod;6622, swing arm;6623, friction block;6624, bevel gear 2. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The present invention provides the following technical solutions:

[0029] Example 1

[0030] See also Figure 1 - Figure 4 A soccer ball high and low temperature aging detection device includes a bottom plate 1, a detection box 2 and a fixing frame 7 are fixedly connected to the upper side of the bottom plate 1, a detection unit 6 is provided on the upper side of the bottom plate 1, and the detection unit 6 is used to simulate the impact and extreme temperature composite environment, a base 4 is fixedly connected to the middle part of the upper side of the bottom plate 1, a soccer ball body 5 is provided on the upper side of the base 4, a hydraulic cylinder 8 is fixedly connected to the upper side of the fixing frame 7, a pressure plate 9 is fixedly connected to the lower output end of the hydraulic cylinder 8, a support box 3 is fixedly connected to the lower side of the bottom plate 1, and the detection unit 6 includes two sliding holes 63, both of which are opened on the bottom plate 1 On the upper side of the bottom plate 1 and on the left and right sides of the football body 5, an impact component 65 is provided. The impact component 65 performs periodic impact detection on the football body 5, wherein the base 4 is used to support the football body 5 to ensure that the position of the football is stable during the detection. When performing the detection, the hydraulic cylinder 8 is controlled to drive the pressure plate 9 to descend. The pressure plate 9 is an arc-shaped structure, which makes it convenient for the pressure plate 9 to fit the surface of the football body 5 and limit the position of the football body 5. The inside of the detection box 2 is provided with a temperature control component of the prior art, which can adjust the temperature in the box to extremely high or low temperatures to achieve high and low temperature aging simulation of the football body 5.

[0031] The impact assembly 65 includes a slider 651, which is slidably connected to the inner side of the sliding hole 63. The upper sides of the two sliders 651 are fixedly connected to a moving plate 652. The side of the moving plate 652 close to the football body 5 is fixedly connected to a connecting rod 653. The outer end of the connecting rod 653 is fixedly connected to an impact block 654. The lower sides of the two sliders 651 are fixedly connected to a bottom block 655. The outer sides of the two bottom blocks 655 are rotatably connected to an inclined plate 656. The outer side of the inclined plate 656 is rotatably connected to a rotating block 657. The lower side of the rotating block 657 is fixedly connected to a lifting block 658. The lower side of the lifting block 658 is fixedly connected to a contact block 659. The inner wall of the support box 3 is fixedly connected to two fixed blocks 61. A control rod 6510 is rotatably connected between the two fixed blocks 61. A cam 6511 is fixedly connected to the outer side of the control rod 6510. A telescopic rod 6512 and a spring are fixedly connected between the lifting block 658 and the bottom plate 1. 6513, the front side of the fixed block 61 is fixedly connected to the motor 62 that drives the control rod 6510 to rotate. When performing the test, the motor 62 is controlled, and the motor 62 drives the control rod 6510 to rotate. The control rod 6510 drives the cam 6511 to rotate. The cam 6511 drives the contact block 659 to move up and down repeatedly. The contact block 659 drives the lifting block 658 to move up and down repeatedly. The lifting block 658 drives the inclined plate 1 656 to rotate. The inclined plate 1 656 drives the slider 1 651 to move. Since the two inclined plates 1 656 are symmetrically distributed, the sliders 1 651 on both sides move toward each other repeatedly. The slider 1 651 drives the movable plate 652 to move. The movable plate 652 drives the connecting rod 653 to move. The connecting rod 653 drives the impact block 654 to move, so that the impact blocks 654 on the left and right sides repeatedly impact the outer surface of the football body 5, realizing the composite environment simulation of the impact effect and the extreme temperature, so that the test conditions are closer to the actual use scenario of the football.

[0032] Example 2

[0033] Based on the first embodiment, Figure 5 - Figure 8As shown, a reinforcing assembly 66 is provided on the outer side of the impact block 654, and the reinforcing assembly 66 includes four side blocks 661, and the side blocks 661 are fixedly connected to the front and rear sides of the impact block 654. A rotating rod 662 is rotatably connected between the two side blocks 661 on the same side, and a swing plate 663 is fixedly connected to the outer side of the rotating rod 662. The side of the swing plate 663 close to the football body 5 is fixedly connected to the knocking block 664. The upper ends of the front and rear rotating rods 662 pass through the upper side of the side blocks 661 and are fixedly connected to the top plate 665. The upper side of the impact block 654 is rotatably connected to the rotating shaft 669. The upper side of the impact block 654 and the front and rear sides of the rotating shaft 669 are provided with movable grooves 666. The inner side of the movable groove 666 is slidably connected to a moving block 667, and the upper side of the moving block 667 is rotatably connected to a control block 668. The control block 668 is rotatably connected to the top plate 665. The upper end of the rotating shaft 669 is fixedly connected to a turntable 6610. The outer side of the turntable 6610 is fixedly connected to two rotating blocks 6611. The upper side of the rotating block 6611 is rotatably connected to the inclined plate 6612. The inclined plate 6612 is rotatably connected to the moving block 667. The outer side of the rotating shaft 669 is fixedly connected to a gear part 6613. A sliding groove 6615 is provided on the upper side of the impact block 654. The inner side of the sliding groove 6615 is slidably connected to the slider 2 6616. The upper side of the slider 2 6616 is fixedly connected to There is a connecting block 6617, the upper side of the connecting block 6617 is fixedly connected to a tooth plate 6614 meshing with the gear member 6613, the upper side of the bottom plate 1 is fixedly connected to the vertical plate 64, and a connecting plate 6618 is fixedly connected between the vertical plate 64 and the tooth plate 6614. When the impact block 654 moves toward the football body 5, the connecting plate 6618 pulls the tooth plate 6614, causing the slider 2 6616 to slide along the slide groove 6615 in the direction away from the football. Through the meshing transmission of the tooth plate 6614 and the gear member 6613, the rotating shaft 669 is driven to rotate, the rotating shaft 669 drives the turntable 6610 to rotate, the turntable 6610 drives the rotating block 2 6611 to rotate, and the rotating block 2 6611 drives the inclined plate 6611 to rotate. Plate 2 6612 rotates, and inclined plate 2 6612 drives moving block 667 to move. Since the two inclined plates 6612 are arranged in parallel, the moving blocks 667 on the front and rear sides move toward each other, and the moving block 667 drives the control block 668 to rotate. The control block 668 drives the top plate 665 to rotate, and the top plate 665 drives the rotating rod 662 to rotate. The rotating rod 662 drives the swinging plate 663 to rotate, and the swinging plate 663 drives the striking block 664 to rotate. The striking blocks 664 on the front and rear sides swing repeatedly with the swinging plate 663, impacting the front and rear surfaces of the football body 5 from the side, forming a multi-angle composite effect with the frontal impact of the impact block 654, which is closer to the multi-directional force applied to the football in an actual game.

[0034] The front and rear sides of the impact block 654 are fixedly connected to L-shaped plates 6620, and the outer sides of the L-shaped plates 6620 on the front and rear sides are rotatably connected to swing rods 6621. The end of the swing rod 6621 close to the impact block 654 is fixedly connected to bevel gear 2 6624, and the middle part of the rotating rod 662 is fixedly connected to bevel gear 1 6619 meshing with bevel gear 2 6624. The other end of the swing rod 6621 is fixedly connected to a swing arm 6622, and the side of the swing arm 6622 close to the football body 5 is fixedly connected to a friction block 6623. When the rotating rod 662 rotates back and forth, bevel gear 1 6619 meshes with bevel gear 2 6624 for transmission, so that the swing rod 6621 drives the swing arm 6622 to swing back and forth, and the friction block 6623 then generates periodic friction with the surface of the football body 5, simulating the wear scenario when the football comes into contact with the ground and the player's body during the game.

[0035] Working principle: When in use, place the football body 5 on the base 4, and then control the hydraulic cylinder 8 to drive the pressure plate 9 to descend, so that the pressure plate 9 can limit the football body 5, and then start the motor 62, the motor 62 drives the control rod 6510 to rotate, the control rod 6510 drives the cam 6511 to rotate, and the cam 6511 drives the lifting block 658 to move up and down repeatedly. Under the action of the inclined plate 656 and the slider 651, the movable plate 652 is controlled to move, and the movable plate 652 drives the connecting rod 653 to move, and the connecting rod 653 drives the impact block 654 to move. The impact blocks 654 on the left and right sides move toward each other, so that the impact blocks 654 can repeatedly impact the football body 5, and cooperate with the detection box 2 to realize the composite environment simulation of impact and extreme temperature, so that the detection conditions are closer to the actual use scenario of the football, and the authenticity of the detection is increased. At the same time, under the action of the connecting plate 6618, the tooth plate is controlled 6614 moves, the gear plate 6614 drives the gear part 6613 to rotate, the gear part 6613 drives the rotating shaft 669 to rotate, the rotating shaft 669 drives the turntable 6610 to rotate, the turntable 6610 drives the second rotating block 6611 to rotate, and the second rotating block 6611 drives the second inclined plate 6612 to rotate. Under the action of the moving block 667, the control block 668 and the top plate 665, the rotating rod 662 is controlled to rotate, and the rotating rod 662 drives the knocking block 664 on the swinging plate 663 to swing, so that the knocking block 664 can impact the football body 5 again, thereby increasing the impact effect. At the same time, the rotating rod 662 drives the bevel gear 1 6619 to rotate, and the bevel gear 1 6619 drives the bevel gear 2 6624 to rotate. Under the action of the swinging rod 6621, the friction block 6623 on the swinging arm 6622 is controlled to swing, accurately simulating the friction loss scenario when the football contacts the ground and the player's body during the game, thereby improving the comprehensiveness of the detection.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A soccer ball high and low temperature aging detection device, comprising a base plate (1), characterized in that: The upper side of the bottom plate (1) is fixedly connected to a detection box (2) and a fixing frame (7), and a detection unit (6) is provided on the upper side of the bottom plate (1). The detection unit (6) is used to simulate a composite environment of impact and extreme temperature. The middle part of the upper side of the bottom plate (1) is fixedly connected to a base (4), and a football body (5) is provided on the upper side of the base (4). The upper side of the fixing frame (7) is fixedly connected to a hydraulic cylinder (8), and the lower output end of the hydraulic cylinder (8) is fixedly connected to a pressure plate (9). The lower side of the bottom plate (1) is fixedly connected to a support box (3). The detection unit (6) includes two sliding holes (63), and the two sliding holes (63) are both opened on the upper side of the bottom plate (1). An impact component (65) is provided on the upper side of the bottom plate (1) and on the left and right sides of the football body (5). The impact component (65) performs periodic impact detection on the football body (5).

2. The high and low temperature aging detection device for a soccer ball according to claim 1, characterized in that: The impact assembly (65) includes a slider (651) which is slidably connected to the inner side of the sliding hole (63). The upper sides of the two sliders (651) are fixedly connected to a movable plate (652). The movable plate (652) is fixedly connected to a connecting rod (653) on a side close to the football body (5). The outer end of the connecting rod (653) is fixedly connected to an impact block (654).

3. The high and low temperature aging detection device for a soccer ball according to claim 2, characterized in that: The lower sides of the two sliders (651) are fixedly connected to a bottom block (655), the outer sides of the two bottom blocks (655) are rotatably connected to an inclined plate (656), the outer side of the inclined plate (656) is rotatably connected to a rotating block (657), the lower side of the rotating block (657) is fixedly connected to a lifting block (658), the lower side of the lifting block (658) is fixedly connected to a contact block (659), the inner wall of the support box (3) is fixedly connected to two fixed blocks (61), a control rod (6510) is rotatably connected between the two fixed blocks (61), the outer side of the control rod (6510) is fixedly connected to a cam (6511), a telescopic rod (6512) and a spring (6513) are fixedly connected between the lifting block (658) and the bottom plate (1), and the front side of the fixed block (61) is fixedly connected to a motor (62) for driving the control rod (6510) to rotate.

4. The soccer ball high and low temperature aging detection device according to claim 2, characterized in that: A reinforcing assembly (66) is provided on the outer side of the impact block (654), and the reinforcing assembly (66) includes four side blocks (661). The side blocks (661) are fixedly connected to the front and rear sides of the impact block (654). A rotating rod (662) is rotatably connected between two side blocks (661) on the same side. A swing plate (663) is fixedly connected to the outer side of the swing plate (662). A striking block (664) is fixedly connected to the side of the swing plate (663) close to the football body (5).

5. The soccer ball high and low temperature aging detection device according to claim 4, characterized in that: The upper ends of the rotating rods (662) on the front and rear sides pass through the upper sides of the side blocks (661) and are fixedly connected to the top plate (665). The upper side of the impact block (654) is rotatably connected to the rotating shaft (669). A moving groove (666) is provided on the upper side of the impact block (654) and on the front and rear sides of the rotating shaft (669). A moving block (667) is slidably connected to the inner side of the moving groove (666). The upper side of the moving block (667) is rotatably connected to the control block (668). The control block (668) is rotatably connected to the top plate (665). The upper end of the rotating shaft (669) is fixedly connected to a turntable (6610). The outer side of the turntable (6610) is fixedly connected to two rotating blocks (6611). The upper side of the rotating block (6611) is rotatably connected to the inclined plate (6612). The inclined plate (6612) is rotatably connected to the moving block (667).

6. The high and low temperature aging detection device for a soccer ball according to claim 5, characterized in that: The outer side of the rotating shaft (669) is fixedly connected to a gear member (6613), the upper side of the impact block (654) is provided with a slide groove (6615), the inner side of the slide groove (6615) is slidably connected to a second slider (6616), the upper side of the second slider (6616) is fixedly connected to a connecting block (6617), the upper side of the connecting block (6617) is fixedly connected to a tooth plate (6614) meshing with the gear member (6613), the upper side of the bottom plate (1) is fixedly connected to a vertical plate (64), and a connecting plate (6618) is fixedly connected between the vertical plate (64) and the tooth plate (6614).

7. The high and low temperature aging detection device for a soccer ball according to claim 5, characterized in that: The front and rear sides of the impact block (654) are fixedly connected to L-shaped plates (6620), and the outer sides of the L-shaped plates (6620) on the front and rear sides are rotatably connected to swing rods (6621). The end of the swing rod (6621) close to the impact block (654) is fixedly connected to a second bevel gear (6624). The middle part of the rotating rod (662) is fixedly connected to a first bevel gear (6619) meshing with the second bevel gear (6624). The other end of the swing rod (6621) is fixedly connected to a swing arm (6622), and the side of the swing arm (6622) close to the football body (5) is fixedly connected to a friction block (6623).

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