Tennis ball serving mechanism

Abstract

The utility model discloses a tennis ball serving mechanism, and belongs to the technical field of ball serving devices. The ball serving device comprises a ball serving box and an inner side plate, the ball serving box is provided with a ball serving opening, a ball hole is formed in a bottom plate of the ball serving box, shaft holes are formed in two side plates of the ball serving box, driving rollers are matched in the shaft holes, and second friction wheels are arranged on the driving rollers. The number of the inner side plates is two, the two inner side plates are connected through a U-shaped connecting plate, a driving roller is installed between the two inner side plates, a first friction wheel is arranged on the driving roller, and the inner side plates are installed on a shaft of the driving roller through bearing seats. Limiting shafts are installed on the side plates, arc-shaped guide grooves are formed in the inner side plates, and the limiting shafts are in sliding fit with the arc-shaped guide grooves. And a ball outlet is formed between the first friction wheel and the second friction wheel. Continuous ball serving is carried out through the friction wheel.

Description

Technical Field

[0001] This utility model belongs to the technical field of ball-serving devices, and in particular relates to a tennis ball-serving mechanism. Background Technology

[0002] Currently, the number of tennis players in China is growing rapidly, and some of them need to improve their tennis skills by using tennis ball machines in tennis training centers. The current common method is to use a double friction wheel to deliver the ball from the upper ball storage basket to the ball delivery link. This method has problems such as the ball getting stuck on the upper ball storage basket dial and a complex structure. Utility Model Content

[0003] The purpose of this invention is to provide a tennis ball serving mechanism that uses a friction wheel to serve continuously.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model is a tennis ball serving mechanism, including a ball serving box and an inner side plate. The ball serving box has a ball serving opening, a ball hole is opened on the bottom plate of the ball serving box, and shaft holes are opened on the two side plates of the ball serving box. A drive roller is fitted in the shaft hole, and a second friction wheel is provided on the drive roller.

[0006] There are two inner side plates, which are connected by a "U" connecting plate. A drive roller is installed between the two inner side plates. A first friction wheel is installed on the drive roller. The inner side plates are installed on the shaft of the drive roller through a bearing seat.

[0007] A limiting shaft is installed on the side plate, and an arc-shaped guide groove is opened on the inner side plate. The limiting shaft slides into the arc-shaped guide groove.

[0008] The ball outlet is formed between the first friction wheel and the second friction wheel.

[0009] Furthermore, the drive roller is a hub motor, and the outer rotor of the hub motor is covered with a friction surface layer to serve as the second friction wheel and the first friction wheel.

[0010] Furthermore, a motor mount is installed on the inner surface of the side plate, a second motor is mounted on the motor mount, a first drive tooth is mounted on the output shaft of the second motor, and an arc-shaped toothed plate is mounted on the inner side plate, with the first drive tooth meshing with the arc-shaped toothed plate.

[0011] Furthermore, it also includes an arc-shaped guide cylinder and a base. The base has a ball inlet, and a bearing is installed at the ball inlet of the base. The inner ring of the bearing is connected to the upper ball track. The ball outlet port of the upper ball track is provided with an arc-shaped guide cylinder. The arc-shaped guide cylinder is connected to the middle of the limiting shaft. The base plate is installed on the bearing, and the ball hole is connected to the bearing.

[0012] Furthermore, a first motor is installed on the base, and a drive gear is provided at the output shaft end of the first motor. A second drive tooth is installed on the outer surface of the ball end of the arc-shaped guide cylinder, and the second drive tooth meshes with the drive gear.

[0013] Furthermore, the ball outlet port of the arc-shaped guide cylinder faces the ball outlet, and the ball inlet of the upper ball track is connected to the bearing.

[0014] This utility model has the following beneficial effects:

[0015] This invention adopts a bottom-up ball feeding method, eliminating the ball storage basket and the ball feeding dial. The bottom ball inlet is connected to the ball feeding mechanism, reducing the overall size. The second friction wheel is fixed, and the ball fed from bottom to top contacts the second friction wheel first. This method makes the ball feeding link more continuous and integrated, the ball feeding is controllable, and the stability is high. The first motor and the second motor are provided to adjust the left, right, up and down angles of the ball on the ball feeder.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the ball-serving machine.

[0019] Figure 2 This is a bottom view of the ball-serving machine;

[0020] Figure 3 This is a cross-sectional view of AA in convex shape 2;

[0021] Figure 4 This is a schematic diagram of the inside of the ball-serving machine;

[0022] Figure 5 This is a schematic diagram of the internal structure of the ball launcher and the first motor.

[0023] Figure 6 This is a schematic diagram of the ball-serving machine.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Curtain; 2. Ball receiving trough; 3. Ball launcher; 4. Ball loading device; 5. Bracket; 301. Ball launching box; 302. Shaft hole; 303. Base; 304. Bearing seat; 305. Inner side plate; 306. First friction wheel; 307. Ball inlet; 308. Ball outlet; 309. Upper ball track; 3010. First motor; 3011. "U" connecting plate; 3012. First drive gear; 3013. Arc-shaped toothed plate; 3014. Second friction wheel; 3015. Limiting shaft; 3016. Second motor; 3017. Motor base; 3018. Arc-shaped guide groove; 3019. Bearing; 3020. Arc-shaped guide cylinder; 3021. Second drive gear. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Please see Figure 1-6 As shown, this utility model is a tennis ball serving mechanism that launches tennis balls through a ball serving machine for athletes to practice hitting the ball.

[0029] Specifically, the ball launcher 3 is installed behind the curtain 1 with the launch port. After the athlete hits the ball, the ball slides down the curtain 1 into the ball receiving groove 2 placed below the curtain 1, and is then transported to the ball launcher by the ball feeder 4.

[0030] The ball launcher 3 includes a ball box 301, which has a ball-launching opening. Figure 1 The ball box is open-topped. In actual production, only a hole is left on the box shell that does not affect the ball's ejection, so that the ball can be launched from the oblique front of the ball box 301. The ball box 301 is mounted on the bracket 5. The ball box 301 has two side plates with shaft holes 302. The two side plates of the ball box 301 have shaft holes 302. A drive roller is fitted in the shaft hole 302. The drive roller is equipped with a second friction wheel 3014.

[0031] There are two inner side plates 305, which are connected by a "U" connecting plate 3011. The two inner side plates 305 are located inside the ball box 301. A drive roller is installed between the two inner side plates 305. A first friction wheel 306 is provided on the drive roller. A bearing seat 304 is provided on the inner side plate 305. The inner side plate 305 is installed on the shaft of the drive roller through the bearing seat 304. Specifically, a bearing is installed in the bearing seat 304 and the bearing is fitted on the shaft of the drive roller.

[0032] The drive roller is a hub motor, and the outer rotor of the hub motor is covered with a friction surface layer to serve as the second friction wheel 3014 and the first friction wheel 306. Preferably, the outer rotor of the hub motor is covered with a rubber sleeve.

[0033] The first friction wheel 306 and the second friction wheel 3014 form a ball outlet 308, through which the delivered ball is launched.

[0034] When the inner side plate 305 rotates around the drive roller where the second friction wheel 3014 is located, it is limited by the limiting shaft 3015. Specifically, the limiting shaft 3015 is installed on the side plate, and the inner side plate 305 has an arc-shaped guide groove 3018. The limiting shaft 3015 slides in the arc-shaped guide groove 3018.

[0035] The driving and installation method of the second motor 3016:

[0036] A motor mount 3017 is installed on the inner surface of the side plate. A second motor 3016 is installed on the motor mount 3017. A first drive gear 3012 is installed on the output shaft of the second motor 3016. An arc-shaped toothed plate 3013 is installed on the inner side plate 305. The first drive gear 3012 and the arc-shaped toothed plate 3013 mesh. Power is provided by the second motor 3016. The first drive gear 3012 drives the arc-shaped toothed plate 3013, thereby causing the inner side plate 305 and the first friction wheel 306 to rotate around the drive roller where the second friction wheel 3014 is located, thus adjusting the vertical angle of the ball launched from the ball outlet 308.

[0037] The ball is fed from bottom to top, first contacting the second friction wheel and then the first friction wheel 306. This method of ball delivery makes the ball delivery chain more continuous and integrated, the ball delivery is controllable, and the stability is high.

[0038] In addition, the left and right angle of the serve can be adjusted by controlling the overall rotation of the serve box 301.

[0039] The base 303 has a ball inlet 307, and a bearing 3019 is installed at the ball inlet 307. The inner ring of the bearing 3019 is connected to the upper ball track 309. The ball outlet of the upper ball track 309 is provided with an arc-shaped guide cylinder 3020. The arc-shaped guide cylinder 3020 is connected to the middle of the limiting shaft 3015. The ball box 301 has a ball hole in the bottom plate connected to the bearing 3019. The bottom plate is installed on the bearing 3019, and the ball is fed upward by the bearing 3019, through the upper ball track 309 to the arc-shaped guide cylinder 3020. The ball is fed from bottom to top, eliminating the need for the ball storage basket and the ball feeder. The bearing 3019, the upper ball track 309 and the arc-shaped guide cylinder 3020 constitute the link between the lower ball inlet and the upper ball mechanism, reducing the overall volume.

[0040] Furthermore, a first motor 3010 is installed on the base 303, and a drive gear is provided at the output shaft end of the first motor 3010. A second drive gear 3021 is installed on the outer surface of the ball-scoring end of the arc-shaped guide cylinder 3020. The second drive gear 3021 meshes with the drive gear. The bottom plate of the ball-scoring box 301 has a hole, and the bottom plate is installed on the bearing 3019. In addition, a plate with a hole can also be installed on the arc-shaped guide cylinder 3020. The hole is connected to the arc-shaped guide cylinder 3020, and the second drive gear 3021 is provided on one side of the plate.

[0041] Furthermore, the ball outlet port of the arc-shaped guide cylinder 3020 faces the ball outlet 308, the arc-shaped guide cylinder 3020 is connected to the upper ball track 309, and the ball inlet of the upper ball track 309 is connected to the bearing 3019.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A tennis serving mechanism, characterized in that, include: A ball-serving box (301) has a ball-serving opening, a ball hole is opened on the bottom plate of the ball-serving box (301), and shaft holes (302) are opened on both side plates of the ball-serving box (301). A drive roller is fitted in the shaft hole (302), and a second friction wheel (3014) is provided on the drive roller. Inner side plate (305), two inner side plates (305) are provided, the two inner side plates (305) are connected by a "U" connecting plate (3011), a drive roller is installed between the two inner side plates (305), a first friction wheel (306) is provided on the drive roller, and the inner side plate (305) is installed on the shaft of the drive roller through a bearing seat (304); A limiting shaft (3015) is installed on the side plate, and an arc-shaped guide groove (3018) is opened on the inner side plate (305). The limiting shaft (3015) is slidably fitted in the arc-shaped guide groove (3018). The ball outlet (308) is formed between the first friction wheel (306) and the second friction wheel (3014).

2. The tennis ball serving mechanism according to claim 1, characterized in that, The drive roller is a hub motor, and the outer rotor of the hub motor is covered with a friction surface layer to serve as the second friction wheel (3014) and the first friction wheel (306).

3. The tennis ball serving mechanism according to claim 1, characterized in that, A motor mount (3017) is installed on the inner surface of the side plate, a second motor (3016) is installed on the motor mount (3017), a first drive tooth (3012) is installed on the output shaft of the second motor (3016), and an arc-shaped toothed plate (3013) is installed on the inner side plate (305). The first drive tooth (3012) and the arc-shaped toothed plate (3013) mesh.

4. A tennis serving mechanism according to any one of claims 1-3, characterized in that, It also includes an arc-shaped guide cylinder (3020) and a base (303). The base (303) has a ball inlet (307). A bearing (3019) is installed at the ball inlet (307) of the base (303). The inner ring of the bearing (3019) is connected to the upper ball track (309). The ball outlet port of the upper ball track (309) is provided with an arc-shaped guide cylinder (3020). The arc-shaped guide cylinder (3020) is connected to the middle of the limiting shaft (3015). The base plate is installed on the bearing (3019). The ball hole is connected to the bearing (3019).

5. A tennis serving mechanism according to claim 4, characterized in that, A first motor (3010) is installed on the base (303). A drive gear is provided at the output shaft end of the first motor (3010). A second drive tooth (3021) is installed on the outer surface of the ball end of the arc-shaped guide cylinder (3020). The second drive tooth (3021) meshes with the drive gear.

6. A tennis serving mechanism according to claim 5, characterized in that, The ball outlet port of the arc-shaped guide cylinder (3020) faces the ball outlet (308).

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