A linkage structure between the main plate and the card-scraping strip of a mahjong machine

Abstract

The utility model relates to a linkage structure between a large plate and a card-scraping strip of a mahjong machine. It solves the technical problems of the existing complex structure, more parts and components, and increased failure rate. It includes a central lifting shaft seat, in which a central lifting tube is vertically and movably penetrated, a central tube lifting drive mechanism is provided on the central lifting shaft seat, a large plate body and a card-scraping assembly are rotatably sleeved on the circumferential outer side of the central lifting shaft seat, the card-scraping assembly is located at the upper end of the large plate body and the card-scraping assembly has a plurality of card-scraping strips, a large plate rotation drive mechanism is provided on the central lifting shaft seat, an incomplete gear linkage mechanism is provided between the large plate rotation drive mechanism and the card-scraping assembly, and a linkage switching mechanism is provided between the incomplete gear linkage mechanism and the central tube lifting drive mechanism. The advantage is that the device allows the large plate body and the card-scraping assembly to rotate synchronously through the linkage switching mechanism, and also allows the large plate body to rotate alone, the structure is simple, the failure rate is reduced, and thus the shuffling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mahjong machine equipment, and in particular relates to a linkage structure between a large plate and a card-scraping strip of a mahjong machine. Background Art

[0002] In the prior art, the scraping bar of a mahjong machine is usually fixed. When shuffling the cards, the shuffling plate is rotated by a driving motor. The scraping bar guides the mahjong cards on the shuffling plate, so that the mahjong cards on the shuffling plate move toward the card suction port. However, the fixed scraping bar will cause resistance to the shuffling plate when it is in operation, which will affect the service life of the driving motor for a long time. At the same time, the friction between the scraping bar and the shuffling plate generates noise, thereby affecting the customer's use effect. When the scraping bar and the shuffling plate rotate synchronously, there are more linkage parts between the scraping bar and the shuffling plate, and the structure is more complicated, resulting in an increased failure rate.

[0003] In order to solve the deficiencies of the prior art, people have conducted long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a card scraper and a shuffling plate linkage mahjong machine [202121748138.1], including a shuffling plate, a plate driving device, a card scraper and a transmission mechanism, wherein the shuffling plate is provided with an inner gear ring, the plate driving device includes at least one driving gear meshed with the inner gear ring and a driving motor for driving the driving gear to rotate, the transmission mechanism is arranged between the shuffling plate and the card scraper, and the transmission mechanism includes at least a first transmission gear meshed with the inner gear ring.

[0004] The above solution solves the problem that the existing scratching bar and shuffling plate cannot be linked to each other to a certain extent, but the solution still has many shortcomings, such as complex structure, more parts and components, and increased failure rate. Summary of the invention

[0005] The utility model aims to solve the above problems and provides a linkage structure between a large plate and a card-scraping strip of a mahjong machine.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a linkage structure between a large plate and a card-scraping strip of a mahjong machine, comprising a central lifting shaft seat, a central lifting tube vertically and movably penetrated in the central lifting shaft seat, a central tube lifting drive mechanism capable of driving the central lifting tube to vertically lift and lower is arranged on the central lifting shaft seat, a large plate body and a card-scraping assembly are rotatably sleeved on the circumferential outer side of the central lifting shaft seat, the card-scraping assembly is located at the upper end of the large plate body and the card-scraping assembly has a plurality of card-scraping strips in contact with the large plate body, a large plate rotation drive mechanism capable of driving the large plate body to rotate circumferentially is arranged on the central lifting shaft seat, an incomplete gear linkage mechanism is arranged between the large plate rotation drive mechanism and the card-scraping assembly, a linkage switching mechanism is arranged between the incomplete gear linkage mechanism and the central tube lifting drive mechanism, which can make the large plate rotation drive mechanism and the incomplete gear linkage mechanism linked when the central lifting tube rises, so that the large plate body and the card-scraping assembly rotate synchronously under the drive of the large plate rotation drive mechanism, and can disconnect the large plate rotation drive mechanism and the incomplete gear linkage mechanism when the central lifting tube descends, so that the large plate body can rotate relative to the stationary card-scraping assembly. The large plate body and the card-scraping assembly are linked via a linkage switching mechanism, which is operated via a central tube lifting drive mechanism, and the card-scraping assembly is connected to an incomplete gear linkage mechanism, thereby improving overall stability.

[0007] In the above-mentioned linkage structure between the large plate and the scratching strip of a mahjong machine, the large plate rotation driving mechanism includes a large plate motor vertically arranged on one side of the lower end of the central lifting shaft seat, a large plate gear is arranged on the output shaft of the large plate motor, and a plurality of large plate inner gear rings meshing with the large plate gear are arranged on the inner side of the lower end of the large plate body. The large plate body is connected to the large plate gear on the large plate motor through the large plate inner gear ring, so that the function of the large plate body rotating independently can be realized.

[0008] In the above-mentioned linkage structure between the large plate and the card-scraping strip of a mahjong machine, the incomplete gear linkage mechanism includes a linkage, the upper end of the linkage and the card-scraping assembly are mutually circumferentially positioned, the lower end of the linkage is provided with an incomplete gear body having a toothed area and a missing tooth area, the large plate gear is meshed with a large gear arranged on the central lifting shaft seat, and the large gear is coaxially fixedly connected with a small gear located on one side of the incomplete gear body and meshed with the toothed area or not in contact with the missing tooth area. When the small gear meshes with the toothed area, the linkage rotates synchronously with the large plate body, and when the small gear is located in the missing tooth area, the linkage does not rotate with the large plate body, and the large plate body rotates alone.

[0009] In the above-mentioned linkage structure between the large plate and the scratching strip of a mahjong machine, the incomplete gear body is located at the lower end of the large plate body and is coaxially integrally formed at the lower end of the linkage. The incomplete gear body and the linkage are both rotatably sleeved on the upper end of the central lifting shaft seat, and the center of the large plate body has a large plate center hole rotatably sleeved on the upper end of the linkage.

[0010] In the above-mentioned linkage structure between the big plate and the scratching strip of a mahjong machine, the central tube lifting drive mechanism includes a lifting motor horizontally arranged on one side of the lower end of the central lifting shaft seat, the output shaft of the lifting motor is provided with a bent lifting rocker arm, the lower end of the central lifting tube is provided with a lifting bracket abutting against one end of the lifting rocker arm, and a lifting guide assembly is provided between the lifting bracket and the central lifting shaft seat. When the lifting motor is running, the lifting rocker arm rotates around the output shaft of the lifting motor, and while the lifting rocker arm rotates, it contacts the lifting bracket, and then moves up and down along the axis of the central lifting tube with the lifting bracket.

[0011] In the above-mentioned linkage structure between the big plate and the card-scraping strip of a mahjong machine, the lifting guide assembly includes a central lifting guide rail arranged at the lower end of the central lifting shaft seat, and both sides of the central lifting guide rail are respectively provided with vertically arranged slide grooves, and both sides of the lifting bracket are respectively provided with sliding parts slidably arranged in the slide grooves. The slide grooves and the sliding parts play a guiding role to ensure that the lifting bracket moves in an accurate direction.

[0012] In the above-mentioned linkage structure between the big plate and the scratching strip of a mahjong machine, the linkage switching mechanism includes a mounting hole arranged on one side of the central lifting shaft seat, a limiter capable of horizontally moving toward the center direction of the incomplete gear body is arranged in the mounting hole through a horizontal elastic mounting assembly, the upper end of the limiter has a limiter extending upward, the lower end of the incomplete gear body is provided with a gear abutment part capable of abutting or staggering with the limiter, the lower end of the limiter is provided with an inclined guide slope, and the lifting bracket is provided with a lifting and pressing part vertically penetrating the mounting hole and capable of sliding along the guide slope to one side of the limiter so as to push the limiter toward the direction away from the center direction of the incomplete gear body. The guide slope of the limiter contacts the lifting and pressing part, so that the limiter moves along the length direction of the mounting hole, when the limiter contacts the gear abutment part, the incomplete gear body will be stopped from rotating, and when the limiter and the gear abutment part are staggered with each other, the incomplete gear body will follow the rotation.

[0013] In the above-mentioned linkage structure between the big plate and the card-scraping strip of a mahjong machine, the horizontal elastic mounting assembly includes a stopper fixing piece arranged at the lower side of one end of the mounting hole away from the center direction of the incomplete gear body, the stopper is horizontally slidably arranged between the mounting hole and the stopper fixing piece, and a horizontally arranged top pressure spring is arranged between the stopper and the stopper fixing piece. The top pressure spring can help the stopper to reset.

[0014] In the above-mentioned linkage structure between the main plate and the scratching strip of a mahjong machine, the scratching assembly includes a scratching seat located at the upper end of the main plate body, the scratching strips are evenly distributed on the circumferential outer side of the scratching seat, the center of the scratching seat has a scratching seat center hole which is sleeved on the upper end of the central lifting shaft seat, the upper end of the linkage has a linkage connection part which is inserted into the center hole of the scratching seat, and the linkage connection part and the center hole of the scratching seat are positioned with each other through a concave and convex positioning structure.

[0015] In the above-mentioned linkage structure between the big plate and the card-scraping strip of a mahjong machine, the upper end of the central lifting shaft seat is threadedly connected with a central shaft seat nut located at the upper end of the card-scraping seat, and the upper end of the central shaft seat nut is provided with a nut holder sleeved on the central lifting shaft seat and circumferentially positioned with the central lifting shaft seat. The central shaft seat nut and the nut holder can prevent the card-scraping assembly, the linkage and the big plate body from being separated from the central lifting shaft seat, which would affect normal use.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The device enables the large plate body and the card-scraping assembly to rotate synchronously through a linkage switching mechanism, and also enables the large plate body to rotate alone. The structure is simple, the failure rate is reduced, and the shuffling efficiency is improved.

[0018] 2. The device uses a large plate motor to control the rotation of the large plate body and the card-scraping assembly, and then uses a lifting motor to control the linkage between the large plate body and the card-scraping assembly, which reduces the number of motors used, saves space, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural explosion diagram of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the card-scraping component in the utility model.

[0022] Figure 4 It is a structural schematic diagram of the large plate body in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the linkage in the utility model.

[0024] Figure 6 It is a structural schematic diagram of the linkage in the utility model from another perspective.

[0025] Figure 7 It is a structural schematic diagram of the central lifting shaft seat in the utility model.

[0026] Figure 8It is a structural schematic diagram of the central lifting shaft seat in the utility model from another perspective.

[0027] Fig. 9 It is a structural schematic diagram of the central tube lifting drive mechanism and the lifting guide assembly in the utility model.

[0028] Fig.10 It is a structural schematic diagram of the large plate rotation driving mechanism in the utility model.

[0029] In the figure: center lifting shaft seat 1, center lifting tube 11, large plate body 12, large plate center hole 13, center shaft seat nut 14, nut fixer 15, center tube lifting drive mechanism 2, lifting motor 21, lifting rocker arm 22, lifting bracket 23, card scraping assembly 3, card scraping strip 31, card scraping seat 32, card scraping seat center hole 33, linkage connection part 34, concave-convex positioning structure 35, large plate rotation drive mechanism 4, large plate motor 41, large plate gear 42, large plate inner gear ring 43. Incomplete gear linkage mechanism 5, linkage device 51, tooth area 52, missing tooth area 53, incomplete gear body 54, large gear 55, small gear 56, linkage switching mechanism 6, mounting hole 61, limiter 62, limiter part 63, gear abutment part 64, guide slope 65, lifting and pressing part 66, lifting and lowering guide assembly 7, center lifting guide rail 71, slide groove 72, sliding part 73, horizontal elastic mounting assembly 8, limiter fixing plate 81, pressing spring 82. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1-10As shown, a linkage structure of a large plate and a card-scraping strip of a mahjong machine comprises a central lifting shaft seat 1, a central lifting tube 11 is vertically and movably penetrated in the central lifting shaft seat 1, a central tube lifting driving mechanism 2 which can drive the central lifting tube 11 to vertically lift is provided on the central lifting shaft seat 1, a large plate body 12 and a card-scraping assembly 3 are rotatably sleeved on the circumferential outer side of the central lifting shaft seat 1, the card-scraping assembly 3 is located at the upper end of the large plate body 12 and the card-scraping assembly 3 has a plurality of card-scraping strips 31 which are in contact with the large plate body 12, a large plate rotation driving mechanism 4 which can drive the large plate body 12 to rotate circumferentially is provided on the central lifting shaft seat 1, An incomplete gear linkage mechanism 5 is provided between the large disk rotation drive mechanism 4 and the card scraping assembly 3, and a linkage switching mechanism 6 is provided between the incomplete gear linkage mechanism 5 and the central tube lifting drive mechanism 2, which can make the large disk rotation drive mechanism 4 and the incomplete gear linkage mechanism 5 linked when the central lifting tube 11 rises, so that the large disk body 12 and the card scraping assembly 3 rotate synchronously under the drive of the large disk rotation drive mechanism 4, and can disconnect the large disk rotation drive mechanism 4 and the incomplete gear linkage mechanism 5 when the central lifting tube 11 descends, so that the large disk body 12 can rotate relative to the stationary card scraping assembly 3. The large disk body 12 and the card scraping assembly 3 are linked through the linkage switching mechanism 6, which is operated through the central tube lifting drive mechanism 2, and the card scraping assembly 3 is connected to the incomplete gear linkage mechanism 5, thereby improving the overall stability.

[0032] Combination Figure 4 and Fig.10 As shown, the large plate rotation driving mechanism 4 includes a large plate motor 41 vertically arranged on one side of the lower end of the central lifting shaft seat 1, a large plate gear 42 is arranged on the output shaft of the large plate motor 41, and a plurality of large plate inner gear rings 43 meshing with the large plate gear 42 are arranged on the inner side of the lower end of the large plate body 12. The large plate body 12 is connected to the large plate gear 42 on the large plate motor 41 through the large plate inner gear ring 43, so that the function of the large plate body 12 rotating independently can be realized.

[0033] Combination Figure 5 and Fig.10 As shown, the incomplete gear linkage mechanism 5 includes a linkage 51, the upper end of the linkage 51 is circumferentially positioned with the card scraping assembly 3, and the lower end of the linkage 51 is provided with an incomplete gear body 54 having a toothed area 52 and a toothless area 53, the large disc gear 42 is meshed with a large gear 55 arranged on the central lifting shaft seat 1, and the large gear 55 is coaxially fixedly connected with a small gear 56 located on one side of the incomplete gear body 54 and meshing with the toothed area 52 or not in contact with the toothless area 53. When the small gear 56 is meshed with the toothed area 52, the linkage 51 rotates synchronously with the large disc body 12, and when the small gear 56 is located in the toothless area 53, the linkage 51 does not rotate with the large disc body 12, and the large disc body 12 rotates alone.

[0034] Among them, the incomplete gear body 54 is located at the lower end of the large disk body 12 and is coaxially integrally formed at the lower end of the linkage 51. The incomplete gear body 54 and the linkage 51 are both rotatably sleeved on the upper end of the central lifting shaft seat 1. The center of the large disk body 12 has a large disk center hole 13 rotatably sleeved on the upper end of the linkage 51.

[0035] like Fig. 9 As shown, the central tube lifting drive mechanism 2 includes a lifting motor 21 horizontally arranged at one side of the lower end of the central lifting shaft seat 1, a lifting rocker arm 22 in a bent shape is arranged on the output shaft of the lifting motor 21, a lifting bracket 23 abutting against one end of the lifting rocker arm 22 is arranged at the lower end of the central lifting tube 11, and a lifting guide assembly 7 is arranged between the lifting bracket 23 and the central lifting shaft seat 1. When the lifting motor 21 is running, the lifting rocker arm 22 rotates around the output shaft of the lifting motor 21, and while the lifting rocker arm 22 rotates, it contacts the lifting bracket 23, and then moves up and down along the axis of the central lifting tube 11 with the lifting bracket 23.

[0036] The lifting guide assembly 7 includes a central lifting guide rail 71 disposed at the lower end of the central lifting shaft seat 1, and both sides of the central lifting guide rail 71 are respectively provided with vertically arranged slide grooves 72, and both sides of the lifting bracket 23 are respectively provided with sliding parts 73 slidably arranged in the slide grooves 72. The slide grooves 72 and the sliding parts 73 play a guiding role to ensure that the lifting bracket 23 moves in an accurate direction.

[0037] Combination Figure 6 , Figure 7 and Figure 8 As shown, the linkage switching mechanism 6 includes a mounting hole 61 arranged on one side of the central lifting shaft seat 1, and a limiter 62 capable of horizontally moving toward the center direction of the incomplete gear body 54 is arranged in the mounting hole 61 through a horizontal elastic mounting assembly 8, and the upper end of the limiter 62 has a limiting portion 63 extending upward, and the lower end of the incomplete gear body 54 is provided with a gear abutting portion 64 capable of abutting or staggered with the limiting portion 63, and the lower end of the limiter 62 is provided with an inclined guide slope 65, and the lifting bracket 23 is provided with a lifting and lowering pressing portion 66 which is vertically penetrated in the mounting hole 61 and can slide along the guiding slope 65 to one side of the limiter 62 to push the limiter 62 toward the direction away from the center of the incomplete gear body 54. The guide slope 65 of the limiter 62 contacts the lifting and pressing part 66, so that the limiter 62 moves along the length direction of the mounting hole 61. When the limiting part 63 of the limiter 62 contacts the gear abutment part 64, the incomplete gear body 54 will stop rotating. When the limiting part 63 and the gear abutment part 64 are staggered from each other, the incomplete gear body 54 will follow the rotation.

[0038] The horizontal elastic mounting assembly 8 includes a stopper fixing piece 81 disposed at the lower side of one end of the mounting hole 61 away from the center direction of the incomplete gear body 54, the stopper 62 is horizontally slidably disposed between the mounting hole 61 and the stopper fixing piece 81, and a horizontally disposed top pressure spring 82 is disposed between the stopper 62 and the stopper fixing piece 81. The top pressure spring 82 can help the stopper 62 to reset.

[0039] Combination Figure 3 and Figure 5 As shown, the scratching card assembly 3 includes a scratching card seat 32 located at the upper end of the large plate body 12, and the scratching card strips 31 are evenly distributed on the circumferential outer side of the scratching card seat 32. The center of the scratching card seat 32 has a scratching card seat center hole 33 which is sleeved on the upper end of the central lifting shaft seat 1. The upper end of the linkage 51 has a linkage connection part 34 which is inserted into the center hole 33 of the scratching card seat, and the linkage connection part 34 and the center hole 33 of the scratching card seat are positioned with each other through a concave-convex positioning structure 35.

[0040] like Figure 2 As shown, the upper end of the central lifting shaft seat 1 is threadedly connected with the central shaft seat nut 14 located at the upper end of the card scraping seat 32, and the upper end of the central shaft seat nut 14 is provided with a nut holder 15 which is sleeved on the central lifting shaft seat 1 and circumferentially positioned with the central lifting shaft seat 1. The central shaft seat nut 14 and the nut holder 15 can prevent the card scraping assembly 3, the linkage 51 and the large plate body 12 from being separated from the central lifting shaft seat 1, affecting normal use.

[0041] The principle of this embodiment is:

[0042] When the lifting motor 21 is running, the lifting rocker arm 22 makes the lifting bracket 23 move upward, the lifting top pressure part 66 on the lifting bracket 23 and the gear abutment part 64 of the linkage 51 are staggered, the large plate motor 41 starts to run, the large plate gear 24 is meshed with the large plate inner gear ring 43 of the large plate body 12, the large plate body 12 rotates, and the scraping strip 31 contacts the surface of the large plate body 12 to generate friction, which drives the scraping assembly 3 to rotate, and the linkage 51 follows the scraping assembly 3 rotates, the tooth area 52 of the linkage 51 meshes with the small gear 56, and the large gear 55 meshes with the large plate gear 42, so that the card scraping assembly 3 and the large plate body 12 rotate synchronously; when the lifting motor 21 is running, the lifting rocker arm 22 makes the lifting bracket 23 move downward, the lifting top pressing part 66 contacts the gear abutting part 64, and the small gear 56 is located in the missing tooth area 53 at this time, then the card scraping assembly 3 stops rotating, and the large plate body 12 continues to rotate under the drive of the large plate motor 41.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0044] Although this article uses more central lifting shaft seat 1, central lifting tube 11, large plate body 12, large plate center hole 13, central shaft seat nut 14, nut fixer 15, central tube lifting drive mechanism 2, lifting motor 21, lifting rocker arm 22, lifting bracket 23, card scraping assembly 3, card scraping strip 31, card scraping seat 32, card scraping seat center hole 33, linkage connection part 34, concave-convex positioning structure 35, large plate rotation drive mechanism 4, large plate motor 41, large plate gear 42, large plate inner gear ring 43, incomplete The gear linkage mechanism 5, linkage 51, tooth area 52, missing tooth area 53, incomplete gear body 54, large gear 55, small gear 56, linkage switching mechanism 6, mounting hole 61, stopper 62, stopper portion 63, gear abutment portion 64, guide slope 65, lifting and pressing portion 66, lifting and guiding assembly 7, central lifting guide rail 71, slide groove 72, sliding portion 73, horizontal elastic mounting assembly 8, stopper fixing plate 81, pressing spring 82 and other terms are used, but the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A linkage structure of a large plate and a card-scraping strip of a mahjong machine, comprising a central lifting shaft seat (1), a central lifting tube (11) is vertically movably penetrated in the central lifting shaft seat (1), a central tube lifting driving mechanism (2) capable of driving the central lifting tube (11) to vertically lift is provided on the central lifting shaft seat (1), a large plate body (12) and a card-scraping assembly (3) are rotatably sleeved on the circumferential outer side of the central lifting shaft seat (1), the card-scraping assembly (3) is located at the upper end of the large plate body (12) and the card-scraping assembly (3) has a plurality of card-scraping strips (31) in contact with the large plate body (12), a large plate rotation driving mechanism (4) capable of driving the large plate body (12) to rotate circumferentially is provided on the central lifting shaft seat (1), characterized in that: An incomplete gear linkage mechanism (5) is provided between the large disk rotation drive mechanism (4) and the card scraping assembly (3), and a linkage switching mechanism (6) is provided between the incomplete gear linkage mechanism (5) and the central tube lifting drive mechanism (2), which can make the large disk rotation drive mechanism (4) and the incomplete gear linkage mechanism (5) linked when the central lifting tube (11) rises, so that the large disk body (12) and the card scraping assembly (3) rotate synchronously under the drive of the large disk rotation drive mechanism (4), and can disconnect the large disk rotation drive mechanism (4) and the incomplete gear linkage mechanism (5) when the central lifting tube (11) descends, so that the large disk body (12) can rotate relative to the stationary card scraping assembly (3).

2. A mahjong machine plate and card-scraping strip linkage structure according to claim 1, characterized in that: The large disc rotation driving mechanism (4) comprises a large disc motor (41) vertically arranged on one side of the lower end of the central lifting shaft seat (1), a large disc gear (42) is arranged on the output shaft of the large disc motor (41), and a plurality of large disc inner gear rings (43) meshing with the large disc gear (42) are arranged on the inner side of the lower end of the large disc body (12).

3. A mahjong machine plate and card-scraping strip linkage structure according to claim 2, characterized in that: The incomplete gear linkage mechanism (5) comprises a linkage (51), the upper end of the linkage (51) and the card-scraping assembly (3) are circumferentially positioned relative to each other, the lower end of the linkage (51) is provided with an incomplete gear body (54) having a toothed area (52) and a tooth-missing area (53), the large disk gear (42) is meshed with a large gear (55) arranged on the central lifting shaft seat (1), and the large gear (55) is coaxially fixedly connected with a small gear (56) located on one side of the incomplete gear body (54) and meshed with the toothed area (52) or not in contact with the tooth-missing area (53).

4. A mahjong machine plate and card-scraping strip linkage structure according to claim 3, characterized in that: The incomplete gear body (54) is located at the lower end of the large disk body (12) and is coaxially integrally formed at the lower end of the linkage (51). The incomplete gear body (54) and the linkage (51) are both rotatably sleeved on the upper end of the central lifting shaft seat (1). The center of the large disk body (12) has a large disk center hole (13) rotatably sleeved on the upper end of the linkage (51).

5. A mahjong machine plate and card-scraping strip linkage structure according to claim 3 or 4, characterized in that: The central tube lifting drive mechanism (2) comprises a lifting motor (21) horizontally arranged on one side of the lower end of the central lifting shaft seat (1); a lifting rocker arm (22) in a bent shape is provided on the output shaft of the lifting motor (21); a lifting bracket (23) abutting against one end of the lifting rocker arm (22) is provided at the lower end of the central lifting tube (11); and a lifting guide assembly (7) is provided between the lifting bracket (23) and the central lifting shaft seat (1).

6. The linkage structure between the main plate and the card-scraping strip of a mahjong machine according to claim 5, characterized in that: The lifting guide assembly (7) comprises a central lifting guide rail (71) arranged at the lower end of the central lifting shaft seat (1), and the two sides of the central lifting guide rail (71) are respectively provided with vertically arranged slide grooves (72), and the two sides of the lifting bracket (23) are respectively provided with sliding parts (73) slidably arranged in the slide grooves (72).

7. The linkage structure between the main plate and the card-scraping strip of a mahjong machine according to claim 5, characterized in that: The linkage switching mechanism (6) comprises a mounting hole (61) arranged on one side of the central lifting shaft seat (1); a limiter (62) capable of horizontally moving toward the center direction of the incomplete gear body (54) is arranged in the mounting hole (61) through a horizontal elastic mounting assembly (8); the upper end of the limiter (62) has a limiter portion (63) extending upward; the lower end of the incomplete gear body (54) is provided with a gear abutting portion (64) capable of abutting against or staggering with the limiter portion (63); the lower end of the limiter (62) is provided with an inclined guide slope (65); and the lifting bracket (23) is provided with a lifting and lowering pressing portion (66) which is vertically penetrated in the mounting hole (61) and can slide along the guide slope (65) to one side of the limiter (62) so as to push the limiter (62) toward a direction away from the center direction of the incomplete gear body (54).

8. The linkage structure between the main plate and the card-scraping strip of a mahjong machine according to claim 7, characterized in that: The horizontal elastic mounting assembly (8) comprises a limiter fixing plate (81) arranged at the lower side of one end of the mounting hole (61) away from the center direction of the incomplete gear body (54); the limiter (62) is horizontally slidably arranged between the mounting hole (61) and the limiter fixing plate (81); and a horizontally arranged pressure spring (82) is arranged between the limiter (62) and the limiter fixing plate (81).

9. A mahjong machine plate and card-scraping strip linkage structure according to claim 3 or 4, characterized in that: The card-scraping assembly (3) comprises a card-scraping seat (32) located at the upper end of the large plate body (12), the card-scraping strips (31) are evenly distributed on the circumferential outer side of the card-scraping seat (32), the center of the card-scraping seat (32) has a card-scraping seat center hole (33) sleeved on the upper end of the central lifting shaft seat (1), the upper end of the linkage (51) has a linkage connection part (34) inserted into the card-scraping seat center hole (33), and the linkage connection part (34) and the card-scraping seat center hole (33) are positioned with each other through a concave-convex positioning structure (35).

10. A mahjong machine plate and card-scraping strip linkage structure according to claim 9, characterized in that: The upper end of the central lifting shaft seat (1) is threadedly connected to a central shaft seat nut (14) located at the upper end of the card scraping seat (32), and the upper end of the central shaft seat nut (14) is provided with a nut fixer (15) which is sleeved on the central lifting shaft seat (1) and positioned circumferentially with the central lifting shaft seat (1).

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