Mahjong tile feeding mechanism of automatic mahjong machine

Abstract

The utility model relates to a tile feeding mechanism of an automatic mahjong machine, which comprises a conveying belt, a conveying support, a tile discharging wheel, a tile sucking wheel component and a tensioning component, the tile discharging wheel, the tile sucking wheel component and the tensioning component are mounted on the conveying support, and the conveying belt is wound on the tile discharging wheel and the tile sucking wheel and is tensioned by the tensioning component. The tensioning assembly comprises a swing arm, a tension spring, a tensioning wheel and a wheel shaft, one end of the wheel shaft is fixedly connected with the middle of the swing arm, and the other end of the wheel shaft is sleeved with the tensioning wheel. The tensioning wheel is attached to the conveying belt and used for tensioning the conveying belt. A swing arm shaft is fixedly arranged on the conveying support, one end of the swing arm is rotationally connected with the swing arm shaft, and the other end of the swing arm is connected with the conveying support through a tension spring. The middle of the swing arm is connected with the tensioning wheel, the end, away from the tension spring, of the swing arm is hinged to the conveying support, and therefore the manufacturing size of the conveying support can be reduced as much as possible, and cost is reduced. The torque between the hinged end of the swing arm and the tension spring is relatively large, and the tension of the tension spring on the swing arm is larger, so that the tensioning effect of the tensioning wheel on the conveying belt is better.

Description

Technical Field

[0001] This utility model relates to the field of mahjong machine technology, and in particular to an automatic mahjong machine card feeding mechanism. Background Technology

[0002] Mahjong, as both a recreational activity and a competitive sport, not only helps improve a person's comprehensive thinking ability and strategic planning skills, but also enhances their willpower. With the increasing popularity of mahjong competitions and to save participants' time, fully automatic mahjong machines capable of automatically shuffling and stacking tiles have emerged.

[0003] Existing automatic mahjong machines generally include a shuffling tray and four sets of card-picking and transporting mechanisms surrounding it. Each set of mechanisms includes a card-feeding device, a card-stacking device, a card-pushing device, and a card-lifting device. The card-feeding device comprises a conveyor frame, a card-suction wheel, a card-dispensing wheel, a tensioning wheel, and a conveyor belt. The card-suction wheel, card-dispensing wheel, and tensioning wheel are respectively mounted on the conveyor frame. The conveyor belt wraps around the card-suction wheel and the card-dispensing wheel and is tensioned by a tensioning guide wheel. Over time, the conveyor belt in this type of card-feeding device loosens. To prevent this, the tensioning wheel needs to be periodically inspected and tightened, resulting in high production costs and low production line assembly efficiency. Some modern mahjong machines now use tensioning components that allow the tensioning wheel to automatically tension the conveyor belt.

[0004] For example, a Chinese utility model patent with publication number CN219376041U discloses a mahjong tile delivery mechanism, including a conveyor frame, a tile-absorbing wheel assembly, a tensioning assembly, a conveyor belt, and a tile-feeding wheel. The tile-feeding wheel, tile-absorbing wheel assembly, and tensioning assembly are all mounted on the conveyor frame. The conveyor frame has a tile delivery channel. The tile-feeding wheel is close to the lower end of the tile-out port of the delivery channel, and the tile-absorbing wheel assembly is close to the lower end of the tile-feeding port of the delivery channel. The conveyor belt wraps around the tile-feeding wheel and tile-absorbing wheel assembly and is tensioned by the tensioning assembly, ensuring stable tile delivery. The tensioning assembly includes a pull rod, a tension spring, and a tensioning guide wheel. The pull rod is rotatably mounted on the conveyor frame via a retaining ring shaft. One end of the pull rod is connected to the conveyor frame via a tension spring, and the other end of the pull rod is rotatably connected to the tensioning guide wheel. The pull rod and tensioning guide wheel are located on opposite sides of the conveyor frame, with the tensioning guide wheel pressed against the conveyor belt to tension it.

[0005] In the above scheme, the middle of the pull rod is hinged to the conveyor frame, and the tensioning guide wheel is located inside the hinge end. Therefore, the length of the conveyor frame is large, resulting in high manufacturing costs. Furthermore, the hinge between the pull rod and the conveyor frame is fixed with a retaining ring, which is prone to loosening during repeated use, causing the tensioning wheel to fail. In addition, the torque between the hinge end of the pull rod and the tension spring is small, resulting in a relatively poor tensioning effect. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide an automatic mahjong machine card feeding mechanism. By connecting the middle of the swing arm to the tension wheel and hinged the end of the swing arm away from the tension spring to the conveyor support, the manufacturing size of the conveyor support can be minimized, reducing costs. Simultaneously, when the conveyor belt is slack, the torque between the hinged end of the swing arm and the tension spring is relatively large. Under the same specifications of elastic element (tension spring in this case), the tension spring exerts a greater pulling force on the swing arm, resulting in a better tensioning effect of the tension wheel on the conveyor belt. Furthermore, the overall installation structure of the tensioning assembly is more stable and has a longer service life.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic mahjong machine card feeding mechanism includes a conveyor belt, a conveyor support, and a card-dispensing wheel, a card-suction wheel assembly, and a tensioning assembly mounted on the conveyor support. The conveyor support has a card feeding channel; the card-dispensing wheel is close to the lower end of the card-dispensing opening of the card feeding channel; the card-suction wheel assembly is close to the lower end of the card-inlet opening of the card feeding channel; the conveyor belt wraps around the card-dispensing wheel and the card-suction wheel and is tensioned by the tensioning assembly; the tensioning assembly includes a swing arm, a tension spring, and a tensioning wheel. Its distinguishing feature is that:

[0009] The tensioning assembly also includes a wheel axle, one end of which is fixedly connected to the middle of the swing arm, and the other end is fitted with the tensioning wheel; the tensioning wheel is in contact with the conveyor belt and is used to tension the conveyor belt; a swing arm shaft is fixedly provided on the conveyor bracket, one end of the swing arm is rotatably connected to the swing arm shaft, and the other end of the swing arm is connected to the conveyor bracket through a tension spring.

[0010] Preferably, the swing arm and tension wheel are disposed on both sides of the conveying bracket, and the conveying bracket is provided with sliding holes that cooperate with the wheel axle.

[0011] Preferably, the end of the wheel axle away from the tension wheel is riveted to the swing arm; the end of the swing arm shaft near the swing arm is inserted into the swing arm, and the swing arm shaft is provided with limiting washers and limiting ring walls that fit against both sides of the swing arm.

[0012] Preferably, the limiting washer is riveted to the swing arm shaft, and the limiting ring wall is formed on the swing arm shaft.

[0013] Preferably, the conveying bracket is provided with a polygonal mounting groove, and the bottom surface of the polygonal mounting groove is provided with a through hole for the swing arm shaft to pass through; the swing arm shaft is formed with a mounting block that is press-fitted with the polygonal mounting groove, and the side wall of the mounting block is provided with a multi-faceted limiting wall that abuts against the inner wall of the polygonal mounting groove in the circumferential direction, and a guide arc surface is provided between adjacent limiting walls.

[0014] Preferably, the conveying bracket has an inwardly recessed groove, and a polygonal mounting groove and a sliding hole are provided on the bottom surface of the groove; a first reinforcing wall is provided around the mounting groove, and the first reinforcing wall is fixedly connected to the side wall of the polygonal mounting groove by a number of first reinforcing ribs.

[0015] Preferably, the edge of the sliding hole is provided with a second reinforcing wall, which is fixedly connected to the inner wall of the groove and the outer wall of the first reinforcing wall by a number of second reinforcing ribs, and part of the second reinforcing wall is embedded in the first reinforcing wall.

[0016] Preferably, the card-collecting wheel assembly includes a conveying motor and a card-collecting wheel disposed on both sides of the conveying bracket. The conveying bracket is provided with a card-collecting wheel shaft, and the card-collecting wheel is sleeved on the card-collecting wheel shaft. A receiving groove is formed on the periphery of the card-collecting wheel shaft, which is recessed towards the conveying motor side. An output gear is formed on the card-collecting wheel and placed in the receiving groove. A notch is formed on the side wall of the receiving groove to expose part of the output gear. The conveying motor is fixedly mounted on the conveying bracket, and an input gear that meshes with the output gear is sleeved on the motor shaft of the conveying motor.

[0017] The card-suction wheel is close to the lower end of the card inlet of the card-feeding channel. The conveyor motor can drive the input gear to rotate, which in turn drives the output gear and the card-suction wheel to rotate, thereby driving the conveyor belt on the card-suction wheel to run.

[0018] Preferably, the system also includes a conveyor support cover, wherein the conveyor support has a plurality of connecting grooves and the conveyor support cover is provided with a plurality of connecting posts adapted to the connecting grooves; a card-dispensing wheel axle is fixedly provided on the conveyor support, the card-dispensing wheel is sleeved on the card-dispensing wheel axle, and a connecting sleeve is provided on the conveyor support cover, the connecting sleeve being sleeved on the end of the card-dispensing wheel axle away from the conveyor support.

[0019] Preferably, the conveyor support and the conveyor support cover are connected to form a conveyor platform inside the conveyor belt.

[0020] The present invention adopts the above technical solution and has the following beneficial effects:

[0021] ① The middle part of the swing arm is connected to the tension wheel, and the end of the swing arm away from the tension spring is hinged to the conveyor bracket. Therefore, the manufacturing size of the conveyor bracket can be reduced as much as possible, thus reducing costs.

[0022] ② Because the torque between the hinge end of the swing arm and the tension spring is relatively large, the tension on the swing arm is greater under the same specifications of elastic element (tension spring in this case), which makes the tensioning wheel have a better tensioning effect on the conveyor belt.

[0023] ③ The swing arm is installed on the conveyor bracket via the swing arm shaft, and the hinge ends of the swing arm and the conveyor bracket are respectively limited by the limiting washer and the limiting ring wall, which effectively prevents the swing arm from detaching and improves the rotational stability of the swing arm.

[0024] ④ A polygonal mounting groove is set on the conveyor bracket to cooperate with the mounting block on the swing arm shaft, which effectively improves the installation stability of the swing arm shaft and prevents the swing arm shaft from detaching.

[0025] ⑤ The guide arc surface of the mounting block facilitates pressing the mounting block into the polygonal mounting groove, improving convenience.

[0026] ⑥ A groove is set on the conveyor bracket, and the polygonal mounting slot is set in the groove, which effectively reduces the assembly thickness of the tensioning component, reduces the size of the mechanism, and reduces costs.

[0027] ⑦ The setting of the first reinforcing wall, the first reinforcing rib, the second reinforcing wall and the second reinforcing rib outside the polygonal mounting groove effectively improves the structural fit strength in the groove of the conveying bracket and reduces the impact of the groove setting.

[0028] ⑧. An output gear is formed on the card suction wheel. The conveyor motor drives the input gear to drive the output gear and the card suction wheel to rotate and output. The speed control is more precise, the motor installation size is small, and the space utilization is improved.

[0029] ⑨ The conveyor platform supports the mahjong tiles on the conveyor belt, preventing them from falling due to the conveyor belt's inability to support them, thus improving the stability of the tile delivery. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the tensioning assembly installed on the conveyor support.

[0031] Figure 2 This is a schematic diagram of the exploded structure of the tensioning component.

[0032] Figure 3 This is a three-dimensional structural diagram of the swing arm shaft.

[0033] Figure 4 This is a three-dimensional structural diagram of an automatic mahjong machine's tile-feeding mechanism.

[0034] Figure 5 This is a schematic diagram showing the distribution of the card-drawing wheel, tension wheel, and card-dispensing wheel.

[0035] Figure 6 This is a schematic diagram showing the interaction between the tensioner and the conveyor belt.

[0036] Figure 7 This is a schematic diagram showing the arrangement of the grooves and polygonal mounting slots on the conveyor support.

[0037] Figure 8 This is a three-dimensional structural diagram of an automatic mahjong machine's tile-feeding mechanism from another perspective.

[0038] Figure 9 This is a schematic diagram showing the engagement of the input gear and the output gear.

[0039] Figure 10 This is a schematic diagram of the arrangement of the receiving tank.

[0040] Figure 11 This is a schematic diagram showing the forming process of the card-collecting wheel and the output gear.

[0041] Figure 12 This is a three-dimensional structural diagram of the conveyor support cover. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] like Figures 1-6 The automatic mahjong machine card feeding mechanism shown includes a conveyor belt 1, a conveyor support 2, and a card-dispensing wheel 3, a card-suction wheel assembly, and a tensioning assembly mounted on the conveyor support 2. The conveyor support 2 has a card feeding channel. The card-dispensing wheel 3 is close to the lower end of the card-dispensing opening of the card feeding channel, and the card-suction wheel assembly is close to the lower end of the card-inlet opening of the card feeding channel. The conveyor belt 1 wraps around the card-dispensing wheel 3 and the card-suction wheel 4 and is tensioned by the tensioning assembly. The tensioning assembly includes a swing arm 5, a tension spring 6, and a tensioning wheel 7.

[0048] The tensioning assembly also includes a wheel axle 8, one end of which is fixedly connected to the middle of the swing arm 5, and the other end is fitted with the tensioning wheel 7; the tensioning wheel 7 is in contact with the conveyor belt 1 and is used to tension the conveyor belt 1; a swing arm shaft 9 is fixedly provided on the conveyor bracket 2, one end of the swing arm 5 is rotatably connected to the swing arm shaft 9, and the other end of the swing arm 5 is connected to the conveyor bracket 2 through a tension spring 6.

[0049] In the above technical solution, the middle part of the swing arm is connected to the tensioning wheel, and the end of the swing arm away from the tension spring is hinged to the conveyor support. Therefore, the manufacturing size of the conveyor support can be minimized, reducing costs. Furthermore, the torque between the hinged end of the swing arm and the tension spring is relatively large. With the same specifications of elastic element (tension spring in this case), the tension on the swing arm is greater, resulting in better tensioning effect of the tensioning wheel on the conveyor belt.

[0050] like Figure 4 As shown, the swing arm 5 and the tension wheel 7 are disposed on both sides of the conveying bracket 2, and the conveying bracket 2 is provided with a sliding hole 17 that mates with the wheel axle 8. In this technical solution, the swing arm and the tension wheel are disposed on both sides of the conveying bracket to reduce the influence of the swing arm on the card delivery, and the sliding hole is used to mate with the wheel axle to facilitate the rotation of the wheel axle.

[0051] like Figures 1-3As shown, the end of the wheel axle 8 furthest from the tension wheel 7 is riveted to the swing arm 5; the end of the swing arm shaft 9 closest to the swing arm 5 passes through the swing arm 5, and the swing arm shaft 9 is provided with limiting washers 10 and limiting ring walls 11 that fit against both sides of the swing arm 5. In this technical solution, the wheel axle is riveted to the swing arm, making it difficult to detach; the hinge ends of the swing arm and the conveying bracket are respectively limited by limiting washers and limiting ring walls, effectively preventing the swing arm from detaching and improving the rotational stability of the swing arm. Furthermore, the limiting washers 10 are riveted to the swing arm shaft 9, resulting in good structural stability, and the limiting ring walls 11 are formed on the swing arm shaft 9, making the limiting ring walls structurally strong and stable.

[0052] like Figure 7 As shown, the conveying bracket 2 is provided with a polygonal mounting groove 34, and the bottom surface of the polygonal mounting groove 34 is provided with a through hole 12 for the swing arm shaft 9 to pass through. The swing arm shaft 9 is formed with a mounting block 13 that is press-fitted with the polygonal mounting groove 34. The side wall of the mounting block 13 is provided with a multi-faceted limiting wall 14 that abuts against the inner wall of the polygonal mounting groove 34. A guide arc surface 15 is provided between adjacent limiting walls 14. In this technical solution, the polygonal mounting groove and the mounting block on the swing arm shaft are press-fitted, and the mounting block is not easy to detach, so that the swing arm shaft is more stably assembled on the conveying bracket. In addition, the guide arc surface of the mounting block makes it easy to press the mounting block into the polygonal mounting groove, improving convenience.

[0053] Furthermore, a recessed groove 16 is formed on the conveying bracket 2, and a polygonal mounting groove 34 and a sliding hole 17 are disposed on the bottom surface of the groove 16. A first reinforcing wall 18 is provided around the mounting groove, and the first reinforcing wall 18 is fixedly connected to the side wall of the polygonal mounting groove 34 by several first reinforcing ribs 19. In this technical solution, a groove is provided on the conveying bracket, and the polygonal mounting groove is placed within the groove, effectively reducing the assembly thickness of the tensioning component, reducing the size of the mechanism, and reducing costs. The first reinforcing wall and first reinforcing ribs outside the polygonal mounting groove improve the structural strength of the polygonal mounting groove and the conveying bracket.

[0054] Furthermore, the edge of the sliding hole 17 is provided with a second reinforcing wall 20. The second reinforcing wall 20 is fixedly connected to the inner wall of the groove 16 and the outer wall of the first reinforcing wall 18 by a plurality of second reinforcing ribs 21, and a portion of the second reinforcing wall 20 is embedded in the first reinforcing wall 18. In this technical solution, the setting of the second reinforcing wall and the second reinforcing ribs effectively improves the structural strength of the groove on the conveying bracket and reduces the impact of the groove setting.

[0055] like Figures 8-11As shown, the card suction wheel assembly includes a conveying motor 22 and a card suction wheel 4 disposed on both sides of the conveying bracket 2. The conveying bracket 2 is provided with a card suction wheel shaft 23, and the card suction wheel 4 is sleeved on the card suction wheel shaft 23. A receiving groove 24 recessed towards the conveying motor 22 is formed on the periphery of the card suction wheel shaft 23. An output gear 25 is formed on the card suction wheel 4 and placed in the receiving groove 24. A notch 26 is formed on the side wall of the receiving groove 24 to partially expose the output gear 25. The conveying motor 22 is fixedly mounted on the conveying bracket 2, and an input gear 27 that meshes with the output gear 25 is sleeved on the motor shaft of the conveying motor 22.

[0056] The card-suction wheel 4 is close to the lower end of the card inlet of the card-feeding channel. The conveyor motor 22 can drive the input gear 27 to rotate, which in turn drives the output gear 25 and the card-suction wheel 4 to rotate, thereby driving the conveyor belt 1 on the card-suction wheel 4 to rotate.

[0057] In the above technical solution, an output gear is formed on the card-collecting wheel. The conveying motor drives the input gear, which in turn drives the output gear and the card-collecting wheel to rotate and output the card. This results in more precise speed control, a smaller motor installation size, and improved space utilization. A card-collecting wheel bushing 200 is also provided on the card-collecting wheel shaft to facilitate the rotation of the card-collecting wheel.

[0058] In addition Figure 5 In the middle, there are also multiple card-grabbing steel plates 300 on the card-grabbing wheel.

[0059] like Figure 5 and Figure 12 As shown, the automatic mahjong machine's card-feeding mechanism also includes a conveyor support cover 28. The conveyor support 2 has several connecting grooves 29, and the conveyor support cover 28 has several connecting posts 30 that fit into the connecting grooves 29. A card-dispensing wheel axle 31 is fixedly mounted on the conveyor support 2, and the card-dispensing wheel 3 is sleeved on the card-dispensing wheel axle 31. A connecting sleeve 32 is provided on the conveyor support cover 28, and this connecting sleeve 32 is sleeved on the end of the card-dispensing wheel axle 31 away from the conveyor support 2. In this technical solution, after the connecting grooves and connecting posts are engaged, bolts or other fasteners are used to tightly fit the conveyor support cover and the conveyor support, resulting in high assembly stability. Furthermore, the connecting sleeve prevents the card-dispensing wheel from loosening.

[0060] Furthermore, after the conveyor support 2 is connected to the conveyor support cover 28, a conveyor platform 33 is formed inside the conveyor belt 1. In this technical solution, the first conveyor platform 33.1 and the second conveyor platform 33.2 abut against each other to form a conveyor platform, which supports the mahjong tiles on the conveyor belt, preventing the mahjong tiles from falling due to the conveyor belt's inability to support them, and improving the stability of the tile delivery.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An automatic mahjong machine tile feeding mechanism, comprising a conveying belt (1), a conveying support (2), and a tile outlet wheel (3), a tile suction wheel assembly and a tensioning assembly installed on the conveying support (2), wherein, The card conveying support (2) is provided with a card feeding channel, the card outlet lower end of the card feeding channel is tightly attached to the card outlet wheel (3), the card inlet lower end of the card feeding channel is tightly attached to the card suction wheel assembly, the conveying belt (1) is wrapped around the card outlet wheel (3) and the card suction wheel (4) and is tensioned by the tensioning assembly; the tensioning assembly comprises a swing arm (5), a tension spring (6) and a tension wheel (7), and is characterized in that: The tensioning assembly further comprises an axle (8), one end of the axle (8) is fixedly connected to the middle part of the swing arm (5), and the other end is sleeved with the tension wheel (7); the tension wheel (7) is attached to the conveying belt (1) and is used for tensioning the conveying belt (1); the swing arm shaft (9) is fixedly arranged on the card conveying support (2), one end of the swing arm (5) is rotationally connected to the swing arm shaft (9), and the other end of the swing arm (5) is connected to the card conveying support (2) through the tension spring (6).

2. The tile delivery mechanism of the automatic mahjong machine according to claim 1, characterized in that: The swing arm (5) and the tension wheel (7) are arranged on both sides of the card conveying support (2), and the card conveying support (2) is provided with a sliding hole (17) matched with the axle (8).

3. The tile delivery mechanism of the automatic mahjong machine according to claim 2, characterized in that: One end of the axle (8) away from the tension wheel (7) is riveted to the swing arm (5); one end of the swing arm shaft (9) close to the swing arm (5) is arranged in the swing arm (5), and the swing arm shaft (9) is provided with a limiting washer (10) and a limiting ring wall (11) attached to both sides of the swing arm (5).

4. The tile delivery mechanism of the automatic mahjong machine according to claim 3, characterized in that: The limiting washer (10) is riveted to the swing arm shaft (9), and the limiting ring wall (11) is formed on the swing arm shaft (9).

5. The tile delivery mechanism of the automatic mahjong machine according to claim 4, characterized in that: The card conveying support (2) is provided with a polygonal mounting groove (34), and the bottom surface of the polygonal mounting groove (34) is provided with a through hole (12) through which the swing arm shaft (9) passes; the swing arm shaft (9) is formed with a mounting block (13) matched with the polygonal mounting groove (34) in compression assembly, a plurality of limiting walls (14) are circumferentially arranged on the side wall of the mounting block (13) and abut against the inner wall of the polygonal mounting groove (34), and a guide arc surface (15) is arranged between adjacent limiting walls (14).

6. The tile delivery mechanism of the automatic mahjong machine according to claim 5, characterized in that: The card conveying support (2) is inwardly recessed to form a recess (16), and the polygonal mounting groove (34) and the sliding hole (17) are arranged on the bottom surface of the recess (16); a first reinforcing wall (18) is arranged on the periphery of the mounting groove and is fixedly connected to the side wall of the polygonal mounting groove (34) through a plurality of first reinforcing ribs (19).

7. The tile delivery mechanism of the automatic mahjong machine according to claim 6, characterized in that: The edge of the sliding hole (17) is provided with a second reinforcing wall (20), the second reinforcing wall (20) is fixedly connected to the inner wall of the recess (16) and the outer wall of the first reinforcing wall (18) through a plurality of second reinforcing ribs (21) respectively, and part of the second reinforcing wall (20) is embedded in the first reinforcing wall (18).

8. The tile delivery mechanism of the automatic mahjong machine according to claim 1, characterized in that: The card suction wheel assembly comprises a conveying motor (22) and a card suction wheel (4) arranged on both sides of a conveying support (2), the conveying support (2) is provided with a card suction wheel shaft (23), the card suction wheel (4) is sleeved on the card suction wheel shaft (23), the periphery of the card suction wheel shaft (23) is formed with a containing groove (24) recessed to the conveying motor (22) side, and the output gear (25) of the card suction wheel (4) is formed in the containing groove (24); the side wall of the containing groove (24) is formed with a notch (26) for partially exposing the output gear (25), the conveying motor (22) is fixedly installed on the conveying support (2), and the motor shaft of the conveying motor (22) is sleeved with the input gear (27) engaged with the output gear (25). The card suction wheel (4) is close to the lower end of the card inlet of the card conveying channel, the conveying motor (22) can drive the input gear (27) to rotate, drive the output gear (25) and the card suction wheel (4) to rotate, and thus drive the conveying belt (1) on the card suction wheel (4) to run.

9. The tile delivery mechanism of an automatic mahjong machine according to claim 8, characterized in that: The conveying support cover (28) is further provided, a plurality of connecting grooves (29) are formed on the conveying support (2), and a plurality of connecting columns (30) adapted to the connecting grooves (29) are arranged on the conveying support cover (28); the card outlet wheel shaft (31) is fixedly arranged on the conveying support (2), the card outlet wheel (3) is sleeved on the card outlet wheel shaft (31), and the connecting sleeve (32) is arranged on the conveying support cover (28) and sleeved on the end of the card outlet wheel shaft (31) away from the conveying support (2).

10. The tile delivery mechanism of the automatic mahjong machine according to claim 9, characterized in that: The conveying support (2) and the conveying support cover (28) are connected to form a conveying table (33) in the conveying belt (1).

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