Drive mechanism for the shuffling disc of an automatic mahjong machine

Abstract

This utility model discloses a driving device for the shuffling tray of an automatic mahjong machine, solving the technical problem of the start-up vibration of the synchronous motor being transmitted to the shuffling tray in existing automatic mahjong machines. The driving device for the shuffling tray of the automatic mahjong machine proposed in this utility model includes a synchronous motor and a transmission mechanism. The synchronous motor drives the shuffling tray to rotate through the transmission mechanism. The transmission mechanism includes an input component and an output component. The input component is driven by the synchronous motor and drives the output component to rotate. The output component is driven by the shuffling tray. One of the input component and the output component has a transmission head, and the other has a transmission groove. The transmission head and the transmission groove are axially coupled, and a circumferential buffer gap is provided between them. The buffer gap allows the transmission head to freely rotate within the transmission groove when the synchronous motor starts, thus isolating the start-up vibration of the synchronous motor. After the transmission head slides through the buffer gap, it contacts the side wall of the transmission groove, thereby driving the output component to rotate synchronously with the input component.

Description

Technical Field

[0001] This utility model relates to the field of automatic mahjong machines, and in particular to the driving device for the shuffling disc of an automatic mahjong machine. Background Technology

[0002] The drive device for the shuffling disc of the automatic mahjong machine is used to drive the shuffling disc in the shuffling barrel of the automatic mahjong machine to rotate. The rotating shuffling disc drives the mahjong tiles on the shuffling disc to rotate, and cooperates with the tile feeding mechanism of the automatic mahjong machine to shuffle and feed the tiles.

[0003] The drive unit includes a synchronous motor and a transmission mechanism. The transmission mechanism drives the shuffling disc and the synchronous motor, which provides the driving force for the rotation of the shuffling disc. Because the synchronous motor will vibrate at the moment of startup, this vibration is transmitted to the shuffling disc through the transmission mechanism, causing the shuffling disc to vibrate.

[0004] Existing technologies also include shock-absorbing transmission structures for shuffling disc mechanisms. For example, refer to Chinese utility model patent CN221278388U, entitled "Shock-absorbing Transmission Structure for Mahjong Machine Large Disc Drive Gear." In this patent, the transmission component connecting the motor is driven by an elastic plate installed in the gear. However, in this structure, the vibration during motor startup is still directly transmitted to the shuffling disc through the force transmission path from the transmission component to the elastic plate to the gear, causing the shuffling disc to vibrate. Utility Model Content

[0005] This utility model proposes a drive device for the shuffling tray of an automatic mahjong machine to overcome the shortcomings of the prior art, thereby improving the technical problem that the starting vibration of the synchronous motor in the drive device of the shuffling tray of the automatic mahjong machine is transmitted to the shuffling tray.

[0006] To achieve the above technical objectives, the present invention proposes a driving device for the shuffling disc of an automatic mahjong machine, comprising a synchronous motor and a transmission mechanism. The synchronous motor drives the shuffling disc to rotate through the transmission mechanism. The transmission mechanism includes an input component and an output component. The input component is drively connected to the synchronous motor, and the input component drives the output component to rotate. The output component is drively connected to the shuffling disc. One of the input component and the output component is provided with a transmission head, and the other is provided with a transmission groove. The transmission head and the transmission groove are coupled in the axial direction and a circumferential buffer gap is provided between them. The buffer gap is used to allow the transmission head to rotate freely in the transmission groove when the synchronous motor starts, so as to isolate the starting vibration of the synchronous motor. After the transmission head slides through the buffer gap, it contacts the side wall of the transmission groove, thereby driving the output component to rotate synchronously with the input component.

[0007] The drive device for the shuffling disc of the automatic mahjong machine of this utility model has a circumferential buffer gap between the transmission head and the transmission groove, which prevents the input component from contacting the output component when the synchronous motor starts. In this way, the vibration of the synchronous motor when it starts will not be transmitted from the input component to the output component, thus avoiding the problem of vibration of the shuffling disc caused by the vibration. Secondly, in the transmission mechanism of this drive device, the transmission between the synchronous motor and the shuffling disc can be realized by the cooperation of the input component and the output component, without the need for other components.

[0008] Preferably, the transmission head includes a first engagement side and an opposite second engagement side. During the synchronous rotation of the output component and the input component, a reset gap is formed between the second engagement side and the corresponding transmission groove wall. The reset gap is used to allow the output component to continue moving by means of its own rotational inertia and / or the rotation of the shuffling disc when the synchronous motor stops, so as to restore the buffer gap between the first engagement side and the corresponding transmission groove wall.

[0009] By adopting the aforementioned technical solution, the stopping of the synchronous motor causes the synchronously rotating output and input components to stop respectively, and the buffer gap between the transmission head and the transmission groove can be restored. Therefore, no additional mechanism is needed to restore the buffer gap between the transmission head and the transmission groove, which greatly simplifies the drive device of the automatic mahjong machine shuffling plate.

[0010] Preferably, the first engagement side and the second engagement side are interchangeable, allowing the synchronous motor to selectively output either actuating torque or actuating torque in the opposite direction.

[0011] By adopting the aforementioned technical solution, the drive device can be adapted to models with different rotation directions of the shuffling plate, thus improving the versatility of the drive device. At the same time, the synchronous motor's forward and reverse switching can also be used to deal with the problem of mahjong tiles getting stuck on the shuffling barrel and / or shuffling plate.

[0012] Preferably, the transmission head protrudes axially in the input or output component, and the recessed direction of the transmission groove matches the protruding direction of the transmission head.

[0013] Using the aforementioned technical solution, a mating structure between a transmission head and a transmission groove is disclosed.

[0014] Preferably, the transmission head protrudes radially in the input or output component, and the recessed direction of the transmission groove matches the protruding direction of the transmission head.

[0015] Using the aforementioned technical solution, another matching structure between the transmission head and the transmission groove is disclosed.

[0016] Preferably, the transmission head includes a base having a convex arc-shaped outer surface concentric with the rotation axis of the output component, and the transmission groove having a concave arc-shaped inner wall adapted to the convex arc-shaped outer surface. The concave-convex fit between the concave arc-shaped inner wall and the convex arc-shaped outer surface causes the input component to circumferentially limit the output component.

[0017] By adopting the aforementioned technical solution, the convex-concave outer surface of the transmission head and the concave-concave inner wall of the output component can be matched to circumferentially limit the output component, which helps to improve the stability of the output component.

[0018] Preferably, the transmission head is provided in multiple ways, and the multiple transmission heads are distributed at intervals along the circumference of the input component or the output component. The transmission groove is provided in multiple ways, and the multiple transmission grooves cooperate with the multiple transmission heads respectively.

[0019] By adopting the aforementioned technical solution, the input component applies a driving force to the output component in the circumferential direction through the cooperation of multiple transmission heads and multiple transmission grooves, making the rotation of the output component more stable.

[0020] Preferably, the transmission head includes a plurality of transmission parts spaced apart along its circumferential direction and a base connecting each of the transmission parts. The transmission groove includes a plurality of sub-grooves accommodating each of the transmission parts and a base groove connecting each of the sub-grooves and accommodating the base. The base has a convex arc-shaped outer surface connecting adjacent transmission parts and concentric with the rotation axis of the input component. The base groove has a concave arc-shaped inner wall adapted to the convex arc-shaped outer surface. The concave-convex fit between the concave arc-shaped inner wall and the convex arc-shaped outer surface causes the input component to circumferentially limit the output component.

[0021] By adopting the aforementioned technical solution, since the transmission head is provided with multiple circumferentially spaced driving parts and the transmission groove includes multiple sub-grooves corresponding to the driving parts, the input component can provide driving force to the output component in the circumferential direction. At the same time, the convex arc-shaped outer surface provided on the input component and the concave arc-shaped inner wall provided on the output component make the input component able to limit the output component in the circumferential direction, making the circumferential transmission between the input component and the output component more stable and the rotation of the output component more stable.

[0022] Preferably, the circumferential buffer gap between the transmission head and the transmission groove allows the transmission head to swing within the transmission groove, and the central angle of the swing of the transmission head relative to the transmission groove is α, where 5°≤α≤15°.

[0023] By adopting the aforementioned technical solution, the angle at which the transmission head can swing relative to the transmission groove is limited to a suitable range. This not only avoids a large transmission lag between the input and output components, but also effectively prevents the start-up jitter of the synchronous motor from being transmitted to the shuffling disc. Furthermore, it prevents the shuffling disc and the drive device from colliding after the drive device stops, thus avoiding vibration of the shuffling disc and the drive device.

[0024] Preferably, a limiting screw is also included. The input component includes an input component body and a limiting block that protrudes axially from one end of the input component body. The output component is provided with a limiting groove that extends through it axially. The limiting block extends into the limiting groove. The limiting screw is connected to the end of the limiting block away from the input component body, so that the input component and the output component are coupled axially. The limiting block can swing circumferentially in the limiting groove, and the swing angle of the limiting block relative to the limiting groove is greater than or equal to the swing angle of the transmission head relative to the transmission groove.

[0025] Using the aforementioned technical solution, an axial coupling method for the input component and the output component is disclosed. At the same time, this coupling method does not affect the preset swing angle between the input component and the output component.

[0026] Preferably, the limiting block has a first surface near the center of the input component and a second surface near the outer periphery of the input component in the circumferential direction, and the limiting groove has a first groove wall near the center of the output component and a second groove wall near the outer periphery of the output component. The first surface is convex arc-shaped, the first groove wall is concave arc-shaped, and the first surface and the first groove wall are in a concave-convex fit; and / or, The second surface is concave arc-shaped, and the second groove wall is convex arc-shaped, with the second surface and the second groove wall fitting together in a concave-convex manner; So that the input component circumferentially limits the output component.

[0027] By adopting the aforementioned technical solution, the limiting block and the limiting groove can provide circumferential limiting for the input and output components, making the rotation of the output component more stable.

[0028] Preferably, the first engagement side is planar, the normal distance between the rotation axis of the input component and the first engagement side is a, the transmission groove has a first groove wall corresponding to the first engagement side, the first groove wall is planar, the normal distance between the rotation axis of the input component and the first groove wall is b, a=b, so that when the output component and the input component rotate synchronously, the transmission head and the transmission groove are in surface contact.

[0029] By adopting the aforementioned technical solution, the normal distance between the first joint side, the first joint wall and the rotation axis of the input component is set to be equal. This means that when the output component and the input component rotate synchronously, the transmission head and the transmission groove are in surface contact. In this way, on the one hand, the contact area between the transmission head and the transmission groove is increased, and the wear during the transmission process is reduced. On the other hand, when the transmission head slides through the buffer gap and contacts the transmission groove, there is a speed difference between the two. The surface contact between the two can increase the contact area, thereby dispersing the contact impact between the two and reducing contact vibration.

[0030] Preferably, the second engaging side is planar, the normal distance between the rotation axis of the input component and the second engaging side is c, and the transmission groove has a second engaging wall corresponding to the second engaging side. The second engaging wall is planar, and the normal distance between the rotation axis of the input component and the second engaging wall is d. The synchronous motor stops rotating, causing the transmission head to stop rotating. The second engaging side engages with the second engaging wall to stop the shuffling disc. c=d, so that the second engaging side engages with the second engaging wall through surface contact.

[0031] By adopting the aforementioned technical solution, the normal distance between the second joint side, the second joint wall and the rotation axis of the input component is set to be equal. This means that when the input component stops the output component, the transmission head and the transmission groove are in surface contact. In this way, the contact area between the transmission head and the transmission groove can be increased, thereby dispersing the contact impact between the two and reducing contact vibration.

[0032] Preferably, the input component is a transmission shaft sleeve mounted on the synchronous motor shaft, and the output component is a transmission gear that meshes with the shuffling disc.

[0033] The aforementioned technical solution is adopted.

[0034] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0035] Figure 1 This is an exploded view of the shuffling disc and driving device in an embodiment of this utility model; Figure 2 This is a schematic diagram of the output component in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the input component in an embodiment of the present utility model; Figure 4 This is an assembly diagram of the input and output components in an embodiment of the present utility model; Figure 5 This is a top view of the transmission mechanism in an embodiment of this utility model; Figure 6This is a schematic diagram showing the transmission block and transmission groove in the synchronous motor stop position in an embodiment of this utility model; Figure 7 This is a schematic diagram showing the transmission block in a sliding position relative to the transmission groove in an embodiment of this utility model; Figure 8 This is a schematic diagram illustrating how the transmission block contacts the transmission groove in an embodiment of the present invention to cause the output component and the input component to rotate synchronously. Figure 9 This is a schematic diagram showing the swing range of the transmission block and the transmission groove in an embodiment of this utility model; Figure 10 Another schematic diagram illustrating the cooperation between the input component and the output component in this embodiment of the present invention; Figure 11 Another schematic diagram illustrating the cooperation between the input component and the output component in this embodiment of the present invention; Figure 12 Another schematic diagram illustrating the cooperation between the input component and the output component in this embodiment of the present invention; Figure 13 Another schematic diagram illustrating the cooperation between the input component and the output component in this embodiment of the present invention; Figure 14 Another schematic diagram illustrating the cooperation between the input component and the output component in this embodiment of the present invention; Figure 15 This is a front view of the input component and the output component in an embodiment of the present invention; Figure 16 for Figure 15 The side view of the input and output components is shown.

[0036] Figure label: 10. Synchronous motor; 20. Transmission mechanism; 21. Rotation clearance; 22. Reset clearance; 30. Shuffling plate; 31. Internal gear ring; 100. Input component; 110. Transmission head; 111. Drive unit; 112. Base; 1121. Convex arc-shaped outer surface; 113. First engagement side; 114. Second engagement side; 120. Limiting block; 121. First surface; 122. Second surface; 123. Screw hole. 200. Output component; 210. Transmission groove; 211. Sub-groove; 212. Base groove; 2121. Inner wall; 213. First joint wall; 214. Second joint wall; 220. Limiting groove; 221. First groove wall; 222. Second groove wall. Detailed Implementation

[0037] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0038] 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.

[0039] 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" or "several" means two or more, unless otherwise expressly defined.

[0040] 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.

[0041] Example 1: like Figures 1 to 16 As shown in the embodiment of this utility model, the driving device for the automatic mahjong machine shuffling disc includes a synchronous motor 10 and a transmission mechanism 20. The transmission mechanism 20 is connected to the shuffling disc 30 and the synchronous motor 10. The synchronous motor 10 provides the torque required to drive the shuffling disc 30 to rotate and drives the shuffling disc 30 to rotate through the transmission mechanism 20.

[0042] The shuffling tray 30 is used to hold the mahjong tiles in the shuffling bin of the automatic mahjong machine, and its rotation causes the mahjong tiles on the shuffling tray 30 to rotate as well. For details on the shuffling bin of the automatic mahjong machine, please refer to Chinese Utility Model Patent No. CN213100790U, entitled "Shuffling Bin of Electric Mahjong Machine".

[0043] The synchronous motor 10 is fixed on the base plate of the automatic mahjong machine. The base plate of the automatic mahjong machine can be referenced from the Chinese utility model patent with publication number CN211383757U, entitled "Base Plate of Electric Card Organizer and Electric Card Organizer".

[0044] The transmission mechanism 20 includes an input component 100 and an output component 200. The input component 100 is connected to the synchronous motor 10 for transmission. The input component 100 drives the output component 200 to rotate. The output component 200 is connected to the shuffling disc 30 for transmission.

[0045] In this embodiment, the input component 100 is provided with a transmission head 110, and the output component 200 is provided with a transmission groove 210. The transmission head 110 and the transmission groove 210 are coupled in the axial direction and a buffer gap 21 is provided between them in the circumferential direction. The buffer gap 21 is used to allow the transmission head 110 to rotate freely in the transmission groove 210 when the synchronous motor 10 starts, so as to isolate the starting vibration of the synchronous motor 10. After the transmission head 110 slides through the buffer gap 21, it contacts the groove wall of the transmission groove 210, thereby driving the output component 200 and the input component 100 to rotate synchronously.

[0046] In some other embodiments, the transmission head 110 may also be disposed on the output component 200, and the transmission groove 210 may be disposed on the input component 100 accordingly.

[0047] The axial coupling of the transmission head 110 and the transmission groove 210 means that they are axially engaged, restricting their axial movement and ensuring that they maintain circumferential transmission at all times. The specific technical solution for the axial coupling of the transmission head 110 and the transmission groove 210 will be described in detail in subsequent embodiments.

[0048] The drive device for the automatic mahjong machine shuffling tray of this utility model has a circumferential buffer gap 21 between the transmission head 110 and the transmission groove 210, which prevents the input component 100 from contacting the output component 200 when the synchronous motor 10 starts. As a result, the vibration of the synchronous motor 10 when it starts will not be transmitted from the input component 100 to the output component 200, thus avoiding the problem of vibration of the shuffling tray 30 caused by the vibration. Secondly, in the transmission mechanism 20 of this drive device, the transmission between the synchronous motor 10 and the shuffling tray 30 can be realized by the cooperation of the input component 100 and the output component 200, without the need for other components.

[0049] In this embodiment, the vibration when the synchronous motor 10 starts is dispersed to the perimeter of the base plate and the table legs connected to the base plate through the base plate that is fixedly connected to the synchronous motor 10. Compared to the synchronous motor 10 of the shuffling plate 30 mechanism, the mass of the base plate and table legs is very large, making the vibration difficult to detect.

[0050] In this embodiment, the input component 100 is mounted on the motor shaft of the synchronous motor 10 and rotates in tandem with the synchronous motor 10.

[0051] In some other embodiments, the input component 100 may also rotate in tandem with the synchronous motor 10 via other transmission components, such as meshing gears respectively disposed on the input component 100 and the motor shaft of the synchronous motor 10.

[0052] In this preferred embodiment, the input component 100 is a transmission shaft sleeve mounted on the motor shaft of the synchronous motor 10, and the output component 200 is a transmission gear that meshes with the shuffling disc 30.

[0053] In this embodiment, the shuffling disc 30 is provided with an internal gear ring 31 that meshes with the transmission gear.

[0054] In some other embodiments, the shuffling disc 30 may also be provided with an external gear ring that meshes with the output component 200.

[0055] It should be noted that, in Figures 5 to 11 , Figure 13 The relative positions of the input component 100 and the output component 200 shown are for the convenience of labeling components, so that the input component 100 and the output component 200 have a certain preset angle. The positions of the input component 100 and the output component 200 shown in the figure are not their actual positions when the drive device is about to start.

[0056] Example 2: Based on Example 1, such as Figures 6 to 8 As shown, the transmission head 110 includes a first engagement side 113 and an opposite second engagement side 114. During the synchronous rotation of the output component 200 and the input component 100, a reset gap 22 is formed between the second engagement side 114 and the corresponding transmission groove 210 wall. The reset gap 22 is used to allow the output component 200 to continue moving by means of its own rotational inertia and / or the shuffling disc 30 when the synchronous motor 10 stops, so as to restore the buffer gap 21 between the first engagement side 113 and the corresponding transmission groove 210 wall.

[0057] The output component 200 can stop moving under the rotational friction of the shuffling disc, or it can stop moving after the input component 100 stops the output component 200.

[0058] In this way, the stopping of the synchronous motor causes the synchronously rotating output component 200 and input component 100 to stop respectively, and the buffer gap 21 between the transmission head 110 and the transmission groove 210 can be restored. Therefore, no additional mechanism is needed to restore the buffer gap 21 between the transmission head 110 and the transmission groove 210, which greatly simplifies the drive device of the automatic mahjong machine shuffling plate.

[0059] In this preferred embodiment, the first engagement side 113 and the second engagement side 114 are interchangeable, so that the synchronous motor 10 can selectively output positive actuation torque or reverse actuation torque.

[0060] With this configuration, the drive unit can be adapted to models with different shuffling plate rotation directions, improving the versatility of the drive unit. At the same time, the synchronous motor 10 can switch between forward and reverse rotation to deal with the problem of mahjong tiles getting stuck on the shuffling bucket and / or shuffling plate.

[0061] Example 3: Based on Embodiment 2, such as Figure 15 , Figure 16 As shown, in this embodiment, the transmission head 110 protrudes radially on the input component 100 or the output component 200, and the concave direction of the transmission groove 210 is adapted to the convex direction of the transmission head 110.

[0062] In this embodiment, as shown in Figure 15, the drive head 110 protrudes radially from the input component 100, and the drive groove 210 is formed by the output component 200 recessed radially therein. The axial connection between the input component 100 and the output component 200 causes the drive head 110 to at least partially extend into the drive groove 210. The drive groove 210 extends circumferentially from the output component 200, and the extension length of the drive groove 210 is greater than the length of the drive head 110 in the extension direction of the drive groove 210, resulting in a circumferential buffer gap between the drive head 110 and the drive groove 210.

[0063] In some other embodiments, the drive head 110 may be radially protruding on the output component 200, and correspondingly, the drive groove 210 may be radially recessed in the input component 100.

[0064] This embodiment discloses the structure of a transmission groove 210 and a transmission head 110.

[0065] During the axial connection of the input component 100 and the output component 200, the transmission head 110 elastically deforms radially in both components. After the axial connection is complete, the transmission head 110 elastically returns to its original position, allowing it to at least partially extend into the transmission groove 210. Alternatively, the transmission head 110 can be mounted onto the input component 100 or the output component 200 from the outside of the transmission groove 210 after the axial connection is complete. These two methods of engagement between the transmission head 110 and the transmission groove 210 restrict the axial movement of the input component 100 and the output component 200, achieving axial coupling between them.

[0066] Alternatively, a clearance groove can be provided on the input component 100 or the output component 200 to allow for the axial insertion movement of the transmission head 110. The input component 100 and the output component 200 are coupled axially by an axial limiting component, thereby limiting the transmission head 110 to be contained in the transmission groove 210. The axial limiting component can be a screw fixed to the shaft end of the input component 100 or the output component 200.

[0067] Example 4: Based on Embodiment 2, such as Figures 2 to 5 As shown, in this embodiment, the transmission head 110 protrudes axially on the input component 100 or the output component 200, and the concave direction of the transmission groove 210 is adapted to the convex direction of the transmission head 110.

[0068] This embodiment discloses the structure of a transmission groove 210 and a transmission head 110.

[0069] Example 5: Based on Example 4, such as Figures 6 to 13 As shown, in this embodiment, the transmission head 110 includes a base 112, the base 112 having a convex arc-shaped outer surface 1121 concentric with the rotation axis P1 of the input component 100, and the transmission groove 210 having a concave arc-shaped inner wall 2121 adapted to the convex arc-shaped outer surface 1121. The concave-convex fit between the concave arc-shaped inner wall 2121 and the convex arc-shaped outer surface 1121 causes the input component 100 to circumferentially limit the output component 200.

[0070] In this embodiment, the drive device uses the convex-concave outer surface 1121 on the transmission head 110 and the concave-concave inner wall 2121 on the transmission groove 210 to enable the input component 100 to circumferentially limit the output component 200, which helps to improve the stability of the output component 200.

[0071] The concave-convex fit between the concave inner wall 2121 and the convex outer surface 1121 can be a concave-convex fit between one superior arc surface and another superior arc surface, or a concave-convex fit between one superior arc surface and multiple inferior arc surfaces, or a concave-convex fit between multiple inferior arc surfaces and multiple inferior arc surfaces.

[0072] refer to Figures 6 to 8 The convex arc-shaped outer surface 1121 has two minor arcs, and the concave arc-shaped inner wall 2121 has two minor arcs.

[0073] refer to Figure 10 The convex arc-shaped outer surface 1121 is a dominant arc, and the concave arc-shaped inner wall 2121 is set as two minor arcs.

[0074] refer to Figure 11 The convex arc-shaped outer surface 1121 is a dominant arc, and the concave arc-shaped inner wall 2121 is set as a dominant arc.

[0075] refer to Figure 12 The convex arc-shaped outer surface 1121 has three minor arcs, and the concave arc-shaped inner wall 2121 has three minor arcs.

[0076] refer to Figure 13 The convex arc-shaped outer surface 1121 has four minor arcs, and the concave arc-shaped inner wall 2121 has four minor arcs.

[0077] The concave arc-shaped inner wall 2121 includes at least one section, and at least one normal line on the surface of one concave arc-shaped inner wall 2121 passes through the surface of another concave arc-shaped inner wall 2121, or passes through the middle of two other concave arc-shaped inner walls 2121. Correspondingly, the convex arc-shaped outer surface 1121 includes at least one section, and at least one normal line on the surface of one convex arc-shaped outer surface 1121 passes through the surface of another convex arc-shaped outer surface 1121, or passes through the middle of two other convex arc-shaped outer surfaces 1121.

[0078] Example 6: Based on embodiments three and four, such as Figure 13 , Figure 14 , Figure 16 As shown, in this embodiment, there are multiple transmission heads 110, and the multiple transmission heads 100 are distributed at intervals along the circumference of the input component 100 or the output component 200. Correspondingly, there are multiple transmission grooves 210, and the multiple transmission grooves 210 respectively cooperate with the multiple transmission heads 110.

[0079] In this embodiment, the drive device, through the cooperation of multiple transmission heads 110 and multiple transmission grooves 210, enables the input component 100 to apply a driving force to the output component 200 in the circumferential direction, thereby making the rotation of the output component 200 more stable.

[0080] Example 7: Based on Example 4, such as Figures 6 to 8, Figure 12 As shown, in this embodiment, the transmission head 110 includes a plurality of transmission parts 111 spaced apart along its circumferential direction and a base 112 connecting each transmission part 111. The transmission groove 210 includes a plurality of sub-grooves 211 that accommodate each transmission part 111 and a base groove 212 that connects each sub-grooves 211 and accommodates the base 112. The base 112 has a convex arc-shaped outer surface 1121 that connects adjacent transmission parts 11 and is concentric with the rotation axis P1 of the input component 100. The base groove 212 has a concave arc-shaped inner wall 2121 that is adapted to the convex arc-shaped outer surface 1121. The concave-convex fit between the concave arc-shaped inner wall 2121 and the convex arc-shaped outer surface 1121 causes the input component to circumferentially limit the output component.

[0081] like Figures 6 to 8 As shown, the two drive units 111 are symmetrically arranged along the rotation axis P1 of the input component 100, that is, the two drive units 111 are arranged at 180° apart. Correspondingly, the two sub-slots 221 are also symmetrically arranged along the rotation axis P1 of the input component 100, so that the two drive units 111 can synchronously push against the slot walls of the two sub-slots 221 respectively.

[0082] In some other embodiments, the two drive units 111 may also be arranged at other angles, and the sub-slot 221 is adapted to the arrangement of the drive units 111.

[0083] In some other embodiments, such as Figure 11 As shown, there are three drive units 111 on the transmission head 110, and correspondingly, there are also three sub-slots 221, convex arc-shaped outer surface 1121, and concave arc-shaped inner wall 2121.

[0084] In some other embodiments, the drive unit 111, the sub-groove 221, the convex arc-shaped outer surface 1121, and the concave arc-shaped inner wall 2121 are also provided as three or more.

[0085] In this embodiment, the drive device has multiple circumferentially spaced drive sections 111 on the transmission head 110, and the transmission groove 210 includes multiple sub-grooves 221 corresponding to the drive sections 111. This allows the input component 100 to provide driving force to the output component 200 in the circumferential direction. At the same time, the convex arc-shaped outer surface 1121 on the input component 100 and the concave arc-shaped inner wall 2121 on the output component 200 are in a convex-concave fit, allowing the input component 100 to limit the output component 200 in the circumferential direction. This makes the circumferential transmission between the input component 100 and the output component 200 more stable, and the rotation of the output component 200 more stable.

[0086] Example 8: Based on all the aforementioned embodiments, such as Figures 6 to 9As shown, in this embodiment, the buffer gap between the transmission head 110 and the transmission groove 210 in the circumferential direction allows the transmission head 110 to swing in the transmission groove 210. The central angle of the swing of the transmission head 110 relative to the transmission groove 210 is α, where 5°≤α≤15°.

[0087] If the angle at which the transmission head 110 can swing relative to the transmission groove 210 is too large, it will take a long time for the transmission head 110 to slide through the buffer gap 21, resulting in a large transmission lag between the input component 100 and the output component 200, which will affect the transmission efficiency.

[0088] If the angle at which the transmission head 110 can swing relative to the transmission groove 210 is too small, on the one hand, the buffer gap 21 between the transmission head 110 and the transmission groove 210 will be eliminated too quickly, which may cause the vibration of the synchronous motor 10 to be transmitted to the shuffling disc 30 and cause the shuffling disc 30 to vibrate. On the other hand, since the shuffling disc 30 with a large mass decelerates under the action of friction after the synchronous motor 10 stops, if the angle at which the transmission head 110 can swing relative to the transmission groove 210 is too small, the drive output component 200 of the shuffling disc 30, which still has a large rotational speed, will collide with the input component 100, causing the shuffling disc 30 and the drive device to vibrate.

[0089] In this embodiment, the drive device limits the angle at which the transmission head 110 can swing relative to the transmission groove 210 to a suitable range. This not only avoids a large transmission lag between the input component 100 and the output component 200, but also effectively prevents the start-up jitter of the synchronous motor 10 from being transmitted to the shuffling disc 30. Furthermore, it prevents the shuffling disc 30 from colliding with the drive device after the drive device stops, thus avoiding vibration of the shuffling disc 30 and the drive device.

[0090] Example 9: Based on all the aforementioned embodiments, such as Figures 2 to 5 As shown, in this embodiment, the drive device further includes a limiting screw (not shown). The input component 100 includes an input component 100 body and a limiting block 120 that protrudes axially from one end of the input component 100 body. The output component 200 is provided with a limiting groove 220 that extends through it axially. The limiting block 120 extends into the limiting groove 220. The limiting screw is connected to the end of the limiting block 120 away from the input component 100 body, so that the input component 100 and the output component 200 are coupled axially. The limiting block 120 and the limiting groove 220 cooperate to limit the swing angle of the input component 100 relative to the output component 200. The swing angle of the input component 100 relative to the output component 200 limited by the limiting block 120 and the limiting groove 220 is greater than or equal to the swing angle of the input component 100 relative to the output component 200 limited by the transmission head 110 and the transmission groove 210.

[0091] The limiting screw includes a screw rod and a nut. The limiting block 120 is provided with a screw hole 123. The screw rod is screwed into the screw hole 123. The nut is located at one end of the limiting block 120 away from the input component 100 body. The projection of the nut on the input component 100 at least partially exceeds the projection of the limiting groove 220 on the input component 100, so that the nut and the input component 100 body limit the limiting block 120 in the limiting groove 220, thereby restricting the axial movement of the input component 100 and the output component 200, and making the input component 100 and the output component 200 axially coupled.

[0092] The driving device of this embodiment discloses an axial coupling method between the input component 100 and the output component 200. At the same time, the coupling method does not affect the preset swing angle between the input component 100 and the output component 200.

[0093] In this preferred embodiment, such as Figure 5 As shown, the limiting block 120 has a first surface 121 near the center of the input component 100 in the circumferential direction, and the limiting groove 220 has a first groove wall 221 near the center of the output component 200. The first surface 121 is convex arc-shaped, and the first groove wall 221 is concave arc-shaped. The first surface 121 and the first groove wall 221 are in concave-convex cooperation to limit the output component 200 in the circumferential direction of the input component 100.

[0094] This configuration allows the limit block 120 and the limit groove 220 to provide circumferential limits for the input component 100 and the output component 200, making the rotation of the output component 200 more stable.

[0095] In another preferred embodiment, such as Figure 5 As shown, the limiting block 120 has a second surface 122 near the outer periphery of the input component 100 in the circumferential direction, and the limiting groove 220 has a second groove wall 222 near the outer periphery of the output component 200. The second surface 122 is concave arc-shaped, and the second groove wall 222 is convex arc-shaped. The second surface 122 and the second groove wall 222 are in concave-convex fit to limit the output component 200 in the circumferential direction of the input component 100.

[0096] This configuration allows the limit block 120 and the limit groove 220 to provide circumferential limits for the input component 100 and the output component 200, making the rotation of the output component 200 more stable.

[0097] The two preferred embodiments in this example can be combined with each other.

[0098] When implemented individually, each of the two preferred embodiments described above preferably has two or more first surfaces 121 and first groove walls 221 to achieve a better circumferential limiting effect. When implemented in combination, each of the two preferred embodiments can have only one first surface 121, first groove wall 221, second surface 122, and second groove wall 222 to achieve a better circumferential limiting effect; having one or more first surfaces 121, first groove wall 221, second surface 122, and second groove wall 222 can achieve an even better circumferential limiting effect.

[0099] Example 10: Based on Embodiments 1 to 8, unlike Embodiment 9, the synchronous motor 10 includes a motor shaft that passes through the input component 100 and the output component 200 in sequence, and at least a portion of the motor shaft extends out from the shaft end face of the output component 200. The motor shaft extending out from the shaft end face of the output component 200 is provided with a snap ring groove, and the drive device also includes a snap ring that is snapped into the snap ring groove.

[0100] The input component 100 and the output component 200 are coupled axially through a snap ring groove on the motor shaft and a snap ring that is snapped into the snap ring groove.

[0101] Example 11: Based on Examples 2 to 10, such as Figures 6 to 8 As shown, in this embodiment, the first engagement side 113 is planar, the normal distance between the rotation axis P1 of the input component 100 and the first engagement side 113 is a, the transmission groove 210 has a first engagement wall 213 corresponding to the first engagement side 113, the first engagement wall 213 is planar, the normal distance between the rotation axis P1 of the input component 100 and the first engagement wall 213 is b, a=b, so that when the output component 200 and the input component 100 rotate synchronously, the transmission head 110 and the transmission groove 210 are in surface contact.

[0102] Setting the normal distances between the first engagement side 113, the first engagement wall 213, and the rotation axis P1 of the input component 100 to be equal means that when the output component 200 and the input component 100 rotate synchronously, the transmission head 110 and the transmission groove 210 are in surface contact. This increases the contact area between the transmission head 110 and the transmission groove 210, reducing wear during transmission. Furthermore, when the transmission head 110 slides through the buffer gap and contacts the transmission groove 210, there is a speed difference between the two. Surface contact increases the contact area, thereby dispersing the contact impact and reducing contact vibration.

[0103] Example 12: Based on Examples 2 to 11, such as Figures 6 to 8As shown, in this embodiment, the second engagement side 114 is planar, the normal distance between the rotation axis P1 of the input component 100 and the second engagement side is c, and the transmission groove 210 has a second engagement wall 214 corresponding to the second engagement side 114. The second engagement wall 214 is planar, and the normal distance between the rotation axis P1 of the input component 100 and the second engagement wall 214 is d. When the synchronous motor 10 stops, the transmission head 110 stops. The second engagement side 114 engages with the second engagement wall 214 to stop the shuffling disc 30. c=d, so that the second engagement side 114 engages with the second engagement wall 214 through surface contact.

[0104] In this embodiment, after the synchronous motor stops, the input component 100 stops as well, and the output component 200 continues to move by means of its own rotational inertia and / or the rotational inertia of the shuffling disk 30, and stops moving under the stop action of the input component 100.

[0105] Setting the normal distances between the second engagement side 114, the second engagement wall 214, and the rotation axis P1 of the input component 100 to be equal means that when the input component 100 stops the output component 200, the transmission head 110 and the transmission groove 210 are in surface contact. This increases the contact area between the transmission head 110 and the transmission groove 210, thereby dispersing the contact impact between the two and reducing contact vibration.

[0106] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A driving device for the shuffling tray of an automatic mahjong machine, comprising a synchronous motor and a transmission mechanism, wherein the synchronous motor drives the shuffling tray to rotate via the transmission mechanism, the transmission mechanism comprising an input component and an output component, the input component being drively connected to the synchronous motor, the input component driving the output component to rotate, and the output component being drively connected to the shuffling tray, characterized in that, One of the input component and the output component is provided with a transmission head, and the other is provided with a transmission groove. The transmission head and the transmission groove are coupled in the axial direction and a circumferential buffer gap is provided between them. The buffer gap is used to allow the transmission head to rotate freely in the transmission groove when the synchronous motor starts, so as to isolate the starting vibration of the synchronous motor. After the transmission head slides through the buffer gap, it contacts the side wall of the transmission groove, thereby driving the output component to rotate synchronously with the input component.

2. The driving device as described in claim 1, characterized in that, The transmission head includes a first engagement side and an opposite second engagement side. During the synchronous rotation of the output component and the input component, a reset gap is formed between the second engagement side and the corresponding transmission groove wall. The reset gap is used to allow the output component to continue moving by means of its own rotational inertia and / or the rotation of the shuffling disc when the synchronous motor stops, so as to restore the buffer gap between the first engagement side and the corresponding transmission groove wall.

3. The driving device as described in claim 2, characterized in that, The first engagement side and the second engagement side are interchangeable, allowing the synchronous motor to selectively output either actuating torque in the forward direction or actuating torque in the reverse direction.

4. The driving device as described in claim 2, characterized in that, The transmission head protrudes axially from the input or output component, and the recessed direction of the transmission groove matches the protruding direction of the transmission head.

5. The driving device as described in claim 2, characterized in that, The transmission head protrudes radially from the input or output component, and the recessed direction of the transmission groove matches the protruding direction of the transmission head.

6. The driving device as described in claim 4, characterized in that, The transmission head includes a base, the base having a convex arc-shaped outer surface concentric with the rotation axis of the transmission head, and the transmission groove having a concave arc-shaped inner wall adapted to the convex arc-shaped outer surface. The concave-convex fit between the concave arc-shaped inner wall and the convex arc-shaped outer surface causes the input component to circumferentially limit the output component.

7. The driving device as described in claim 4 or 5, characterized in that, The transmission head is provided in multiple ways, and the multiple transmission heads are distributed at intervals along the circumference of the input component or the output component. The transmission groove is provided in multiple ways, and the multiple transmission grooves cooperate with the multiple transmission heads respectively.

8. The driving device as described in claim 4, characterized in that, The transmission head includes a plurality of transmission parts spaced apart along its circumferential direction and a base connecting each of the transmission parts. The transmission groove includes a plurality of sub-grooves accommodating each of the transmission parts and a base groove connecting each of the sub-grooves and accommodating the base. The base has a convex arc-shaped outer surface connecting adjacent transmission parts and concentric with the rotation axis of the transmission head. The base groove has a concave arc-shaped inner wall adapted to the convex arc-shaped outer surface. The concave-convex fit between the concave arc-shaped inner wall and the convex arc-shaped outer surface causes the input component to circumferentially limit the output component.

9. The driving device as claimed in claim 1, characterized in that, The circumferential buffer gap between the transmission head and the transmission groove allows the transmission head to swing within the transmission groove. The central angle of the swing of the transmission head relative to the transmission groove is α, where 5°≤α≤15°.

10. The driving device as claimed in claim 1, characterized in that, It also includes a limiting screw. The input component includes an input component body and a limiting block that protrudes axially from one end of the input component body. The output component has a limiting groove that extends through it axially. The limiting block extends into the limiting groove. The limiting screw is connected to the end of the limiting block away from the input component body, so that the input component and the output component are coupled axially. The limiting block and the limiting groove limit the swing angle of the input component relative to the output component. The swing angle of the input component relative to the output component limited by the limiting block and the limiting groove is greater than or equal to the swing angle of the input component relative to the output component limited by the transmission head and the transmission groove.

11. The driving device as claimed in claim 10, characterized in that, The limiting block has a first surface near the center of the input component and a second surface near the outer periphery of the input component in its circumferential direction, and the limiting groove has a first groove wall near the center of the output component and a second groove wall near the outer periphery of the output component. The first surface is convex arc-shaped, the first groove wall is concave arc-shaped, and the first surface and the first groove wall are in a concave-convex fit; and / or, The second surface is concave arc-shaped, and the second groove wall is convex arc-shaped, with the second surface and the second groove wall fitting together in a concave-convex manner; So that the input component circumferentially limits the output component.

12. The driving device as claimed in claim 2, characterized in that, The first engagement side is planar, and the normal distance between the rotation axis of the input component and the first engagement side is a. The transmission groove has a first engagement wall corresponding to the first engagement side. The first engagement wall is planar, and the normal distance between the rotation axis of the input component and the first engagement wall is b. a=b, so that when the output component and the input component rotate synchronously, the transmission head and the transmission groove are in surface contact.

13. The driving device as claimed in claim 2, characterized in that, The second engagement side is planar, and the normal distance between the rotation axis of the input component and the second engagement side is c. The transmission groove has a second engagement wall corresponding to the second engagement side. The second engagement wall is planar, and the normal distance between the rotation axis of the input component and the second engagement wall is d. The synchronous motor stops rotating, causing the transmission head to stop rotating. The second engaging side engages with the second engaging wall to stop the shuffling disc. c=d, so that the second engaging side engages with the second engaging wall through surface contact.

14. The driving device as claimed in claim 1, characterized in that, The input component is a transmission shaft sleeve mounted on the motor shaft of the synchronous motor, and the output component is a transmission gear that meshes with the shuffling disc.

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