CN216259046U - Mahjong tile machine and variable-speed tile sucking and conveying mechanism thereof - Google Patents

Abstract

The utility model discloses a variable-speed tile sucking and conveying mechanism of a mahjong machine and the mahjong machine. The driving roller and the magnetic mahjong tile sucking wheel are adopted to tension the conveying belt, the variable speed driving unit is adopted to drive the driving roller to rotate, and the magnetic mahjong tile sucking wheel rotates passively, so that when the driving roller rotates at a variable speed under the driving of the variable speed driving unit, the magnetic mahjong tile sucking wheel also rotates at a synchronous variable speed, and finally the variable speed mahjong tile sucking is realized; the variable-speed tile sucking and conveying mechanism of the mahjong machine realizes variable-speed tile sucking on the premise of not modifying the magnetic tile sucking wheel, has low modification cost, and is suitable for rapid popularization and application.

Description

Mahjong tile machine and variable-speed tile sucking and conveying mechanism thereof

Technical Field

The utility model belongs to the technical field of mahjong machines, and particularly relates to a variable-speed tile sucking and conveying mechanism of a mahjong machine and the mahjong machine.

Background

The arranging work of the full-automatic mahjong machine is completed by a shuffling mechanism and a tile sucking and conveying mechanism. After the mahjong tiles fall into the shuffling barrel from the table top through the tile falling channel, the shuffling large disc rotates to enable the tile shifting strips to shift the mahjong tiles, so that the mahjong tiles are uniformly scattered on the shuffling large disc, the mahjong tiles are conveniently sucked one by the magnetic tile sucking wheel and are conveyed to the tile stacking mechanism through the conveying belt to be stacked into tile piers.

It can be seen that in the shuffling process, the mahjong tiles and the shuffling large plate and the mahjong tiles and the playing strips are impacted to generate noise; the mahjong tiles are attracted by the magnetic tile attracting wheel and then the magnetic tile attracting wheel and the magnetic tile attracting wheel collide with each other to generate noise; in order to reduce the noise of arranging the mahjong pieces, the structure of the mahjong machine needs to be improved from two aspects of the shuffling process and the tile sucking process.

At present, the technology for improving the structure of the mahjong machine to reduce the shuffling noise is more from the shuffling angle, and the technology is less from the tile sucking angle. Chinese utility model patent as publication number CN110975276A discloses a mahjong machine variable speed inhales tablet device, and this variable speed inhales tablet device is including sending the tablet support, rotates to connect and inhales the tablet wheel on sending the tablet support to and order about and inhale tablet wheel pivoted drive structure, inhale the rim plate that the tablet wheel includes the casing and is in casing one end tip wherein, drive structure including locating the rim plate two at least concentric drive gears that set up of casing one side dorsad to and with the drive gear of each drive gear one-to-one, different drive gear and the drive gear combination have different velocity ratios.

The variable-speed tile sucking device improves the structure of the magnetic tile sucking wheel, so that the magnetic tile sucking wheel can obtain different rotating speeds in the rotating process, when more tiles are shuffled on the large shuffling tray, the magnetic tile sucking wheel rotates at a low speed, the tile sucking noise is reduced, and when less tiles are shuffled on the large shuffling tray, the magnetic tile sucking wheel rotates at a high speed, and the tile arranging efficiency is improved.

However, the speed-changing card-sucking device has the following steps: the magnetic card-attracting wheel is special in structure, so that the manufacturing cost of the magnetic card-attracting wheel can be increased by performing the variable-speed transformation on the magnetic card-shuffling wheel.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a variable-speed tile sucking and conveying mechanism of a mahjong machine and the mahjong machine.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a mahjong machine variable speed inhales tablet conveying mechanism, is including sending the tablet support, send the tablet support on rotate and be connected with magnetism and inhale tablet wheel and initiative running roller, should magnetism inhale the tablet wheel and take the initiative between the running roller the cover be equipped with the conveyer belt, the initiative running roller drive the rotation by variable speed drive unit.

The utility model adopts the driving roller and the magnetic mahjong tile sucking wheel to tension the conveying belt, and adopts the variable speed driving unit to drive the driving roller to rotate, and the magnetic mahjong tile sucking wheel rotates passively, so that when the driving roller rotates at variable speed driven by the variable speed driving unit, the magnetic mahjong tile sucking wheel also rotates at variable speed synchronously, and finally the variable speed mahjong tile sucking is realized, namely: when the mahjong tiles on the shuffling large disk are few (the shuffling later stage), the driving roller rotates rapidly to enable the magnetic tile sucking wheel to suck the tiles slowly, so that the tile sucking noise is reduced, and when the mahjong tiles on the shuffling large disk are few (the shuffling later stage), the driving roller rotates rapidly, so that the magnetic tile sucking wheel sucks the tiles rapidly, and the tile arranging efficiency is improved.

The variable-speed tile sucking and conveying mechanism of the mahjong machine realizes variable-speed tile sucking on the premise of not modifying the magnetic tile sucking wheel, has low modification cost, and is suitable for rapid popularization and application.

In the variable-speed tile sucking and conveying mechanism of the mahjong machine, the variable-speed driving unit comprises a wheel disc coaxially fixed with the driving roller, at least one transmission gear ring is arranged on the wheel disc, the variable-speed driving unit further comprises at least two driving gears, at least two sets of gear transmission pairs are formed between the driving gears and the transmission gear rings, and each gear transmission pair has different output rotating speeds.

Power is input through the driving gear, and the wheel disc can obtain different output rotating speeds after power transmission of different gear transmission pairs, so that the driving roller coaxially fixed with the wheel disc can also realize variable-speed rotation.

The number of the gear rings can be different, namely the number of the gear rings is 1 or more than 1, which can cause the engagement mode of the driving gear and the gear rings to change.

Specifically, in the variable-speed tile suction conveying mechanism of the mahjong machine, the wheel disc is provided with two transmission gear rings, one of the two drive gears is meshed with the transmission gear ring, and the other drive gear is in transmission with the transmission gear ring through the reversing wheel;

the two driving gears are in one-way transmission with the independent circumferential drivers respectively and have opposite transmission directions.

Or, in the variable-speed tile sucking and conveying mechanism of the mahjong machine, the wheel disc is provided with at least two concentrically arranged transmission gear rings, and each transmission gear ring is meshed with at least one driving gear.

When the number of the transmission gear rings is 1, all the driving gears must output power to the wheel disc and the driving roller wheel through the same transmission gear ring and are limited by the rotation direction of the circumferential drivers (only clockwise rotation or anticlockwise rotation), the number of the driving gears can only be set to two, the two driving gears are respectively in one-way transmission with the independent circumferential drivers and are opposite in transmission direction, and one driving gear must be in transmission (not directly meshed) with the transmission gear ring through the reversing wheel, so that when one driving gear rotates, the other driving gear cannot be influenced, and the wheel disc and the driving roller wheel can rotate towards the same direction no matter the transmission direction of the driving gear.

And when the number of the transmission gear rings is larger than 1, the number of the driving gears can be set to be larger than or equal to 2, namely, each transmission gear ring can be meshed with at least one driving gear, so that the turntable and the driving roller can obtain more different output rotating speeds. Obviously, since the transmission gear rings are concentrically arranged and become influence factors of the output rotating speed, the driving gears meshed with different transmission gear rings can have the same output rotating speed or different output rotating speeds; different drive gears outputting power to the same ring gear still need to have different output rotation speeds.

When the number of the transmission gear rings is more than 1, the arrangement modes of the gear rings of the transmission gear rings can be different, and for convenience of description, the utility model lists two arrangement modes of the gear rings.

In the variable-speed tile suction conveying mechanism of the mahjong machine, all the transmission gear rings are inner gear rings or outer gear rings, and each driving gear is respectively transmitted with an independent circumferential driver.

At this time, the transmission directions of the driving gears meshed with different transmission gear rings are the same, but the transmission directions of the two driving gears transmitted by the same transmission gear ring are still opposite, and both the driving gears are in one-way transmission.

Secondly, in the variable-speed tile sucking and conveying mechanism of the mahjong machine, the transmission gear ring comprises a large transmission gear ring with an inner gear ring and a small transmission gear ring with an outer gear ring, and the driving gear comprises a large one-way gear meshed with the large transmission gear ring and a small one-way gear meshed with the small transmission gear ring;

the large one-way gear and the small one-way gear are arranged on the same circumferential driver in a matching way, and both the large one-way gear and the small one-way gear are in one-way transmission with the circumferential driver and have opposite transmission directions;

or the large one-way gear and the small one-way gear are respectively in transmission with independent circumferential drivers.

Taking two adjacent transmission gear rings as a group as an example, the large transmission gear ring positioned at the outer ring of the wheel disc is an inner gear ring, the small transmission gear ring positioned at the inner ring of the wheel disc is an outer gear ring, and at the moment, two driving gears respectively meshed with the large transmission gear ring and the small transmission gear ring can be driven by the same circumferential driver, so that the number of the circumferential drivers is reduced, and the power is saved; the rotary wheel disc can keep the same rotation direction no matter what the rotation direction of the circumferential driver, and only the rotation speed changes; meanwhile, each driving gear is directly meshed with the corresponding driving gear ring, so that the transmission structure between the driving gear and the transmission gear ring is greatly simplified.

In the variable-speed tile sucking and conveying mechanism of the mahjong machine, the height of the large transmission gear ring is larger than that of the small transmission gear ring, the small one-way gear meshed with the small transmission gear ring is arranged at the front end of the output shaft of the circumferential driver, and the large one-way gear meshed with the large transmission gear ring is arranged at the rear end of the output shaft of the circumferential driver.

The height of the small transmission gear ring is reduced, and the small one-way gear and the large one-way gear can be brought into the surrounding ring of the large transmission gear ring, so that the whole structure is more compact, and the whole volume is reduced. In the variable-speed tile suction conveying mechanism of the mahjong machine, the tile conveying bracket comprises a first forming piece and a second forming piece which are oppositely arranged, and the magnetic tile suction wheel and the driving roller wheel are rotatably arranged between the first forming piece and the second forming piece;

an annular groove for accommodating the large transmission gear ring is formed in one side, facing the driving roller, of the second forming piece, a sinking groove is formed in one side, facing away from the driving roller, of the second forming piece, the large one-way gear is located in the sinking groove, and a through hole penetrating through the sinking groove and the annular groove to enable the large one-way gear to be meshed with the large transmission gear ring is formed in the second forming piece;

the second forming piece is provided with a through hole for the output shaft of the circumferential driver to pass through, and the small one-way gear is positioned on one side of the second forming piece facing the driving roller wheel or positioned in the through hole and extends towards the side of the wheel disc to be meshed with the small transmission gear ring.

After the annular groove and the sinking groove are arranged, the large transmission gear ring is accommodated in the annular groove, the large one-way gear is positioned in the sinking groove, and the sinking groove is in a state of being surrounded by the annular groove, so that the large transmission gear ring and the large one-way gear can be meshed by arranging through openings on the peripheral walls of the annular groove and the sinking groove;

the annular groove and the sinking groove not only can play a role in protecting the large transmission gear ring and the large one-way gear, but also can protect the small one-way gear and the small transmission gear ring because the small one-way gear and the small transmission gear ring are positioned in the surrounding ring of the wheel disc, the second molded part and the large one-way gear.

The utility model also provides a mahjong machine, which comprises a shuffling barrel, wherein the four sides of the shuffling barrel are provided with tile sucking and conveying mechanisms, and the tile sucking and conveying mechanisms are the variable-speed tile sucking and conveying mechanisms of the mahjong machine.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the utility model adopts the driving roller and the magnetic mahjong tile sucking wheel to tension the conveying belt, and adopts the variable speed driving unit to drive the driving roller to rotate, and the magnetic mahjong tile sucking wheel rotates passively, so that when the driving roller rotates at variable speed driven by the variable speed driving unit, the magnetic mahjong tile sucking wheel also rotates at variable speed synchronously, and finally the variable speed mahjong tile sucking is realized, namely: when the mahjong tiles on the shuffling large disc are few (the shuffling later stage), the driving roller rotates rapidly to enable the magnetic tile sucking wheel to suck the tiles slowly, so that the tile sucking noise is reduced; the variable-speed tile sucking and conveying mechanism of the mahjong machine realizes variable-speed tile sucking on the premise of not modifying the magnetic tile sucking wheel, has low modification cost, and is suitable for rapid popularization and application.

(2) In the utility model, the large transmission gear ring positioned at the outer ring of the wheel disc is an inner gear ring, the small transmission gear ring positioned at the inner ring of the wheel disc is an outer gear ring, and at the moment, the two driving gears respectively meshed with the large transmission gear ring and the small transmission gear ring can be driven by the same circumferential driver, so that the number of the circumferential drivers is reduced, and the power is saved; the rotary wheel disc can keep the same rotation direction no matter what the rotation direction of the circumferential driver, and only the rotation speed changes; meanwhile, each driving gear is directly meshed with the corresponding driving gear ring, so that the transmission structure between the driving gear and the transmission gear ring is greatly simplified.

(3) According to the utility model, the second forming part is provided with the annular groove for accommodating the large transmission gear ring and the sinking groove for accommodating the large one-way gear, the annular groove and the sinking groove are respectively arranged at two sides of the second forming part, and the sinking groove is in a state of being surrounded by the annular groove, so that the large transmission gear ring and the large one-way gear can be meshed by arranging the through openings on the peripheral walls of the annular groove and the sinking groove; the annular groove and the sinking groove not only can play a role in protecting the large transmission gear ring and the large one-way gear, but also can protect the small one-way gear and the small transmission gear ring because the small one-way gear and the small transmission gear ring are positioned in the surrounding ring of the wheel disc, the second molded part and the large one-way gear.

Drawings

FIG. 1 is a schematic structural view of a variable speed tile sucking and conveying mechanism of a mahjong machine according to the present invention;

FIG. 2 is a schematic diagram of an explosion structure of the variable speed tile sucking and conveying mechanism of the mahjong machine of the utility model;

FIG. 3 is a schematic structural view of the driving roller and the wheel disc in FIG. 2;

FIG. 4 is a schematic view of the drive roller and the wheel disc shown in FIG. 3 from another perspective;

FIG. 5 is a schematic view showing a second arrangement of a transmission gear ring on a wheel disk in the variable speed tile sucking and conveying mechanism of the mahjong machine according to the present invention;

FIG. 6 is a schematic view showing a third arrangement of a transmission gear ring on a wheel disk in the variable speed tile sucking and conveying mechanism of the mahjong machine according to the present invention;

FIG. 7 is a schematic view showing a fourth arrangement mode of a transmission gear ring on a wheel disk in the variable speed tile sucking and conveying mechanism of the mahjong machine.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Example 1

As shown in fig. 1 and 2, the variable speed tile sucking and conveying mechanism of a mahjong machine in the present embodiment includes a tile feeding support 1, the tile feeding support 1 includes a first forming member 11 and a second forming member 12 which are oppositely disposed, a magnetic tile sucking wheel 2 and a driving roller 3 are rotatably connected between the first forming member 11 and the second forming member 12, the magnetic tile sucking wheel 2 and the driving roller 3 are respectively located at two ends of the tile feeding support 1, a conveying belt (not shown in the figure) is sleeved between the magnetic tile sucking wheel 2 and the driving roller 3, and mahjong tiles sucked up from a shuffling large plate by the magnetic tile sucking wheel 2 are conveyed to downstream by the conveying belt to be stacked into tile piers.

In this embodiment, the rotation of the magnetic card attracting wheel 2 and the running of the conveyer belt are both driven by the driving roller 3, and the power of the driving roller 3 comes from the variable speed driving unit 4 yuan.

As shown in fig. 3 and 4 and seen in combination with fig. 1 and 2, the variable speed driving unit 4 of the present embodiment includes a circumferential driver 41, the circumferential driver 41 adopted in the present embodiment is a tile sucking motor 41a, two driving gears 42 are fittingly installed on an output shaft of the tile sucking motor 41a, and the two driving gears 42 are in one-way transmission with the output shaft of the tile sucking motor 41a and in the opposite transmission direction. Of the two driving gears 42, the small one-way gear 42a is fixed to the front end of the output shaft of the tile sucking motor 41a and has a small gear diameter, and the large one-way gear 42b is fixed to the rear end of the output shaft of the tile sucking motor 41a and has a large gear diameter.

The variable speed drive unit 4 of this embodiment further includes a wheel disc 43 coaxially fixed with the driving roller 3, two transmission gear rings 44 are concentrically disposed on the wheel disc 43, and the two transmission gear rings 44 may be fixedly mounted on the wheel disc 43 or integrally formed with the wheel disc 43. Of the two transmission gear rings 44, the large transmission gear ring 44a positioned at the outer ring of the wheel disc 43 is an inner gear ring, i.e. the gear teeth are positioned at the inner peripheral side of the large transmission gear ring 44 a; and the small transmission gear ring 44b positioned at the inner ring of the wheel disc 43 is an outer gear ring, i.e. the gear teeth are positioned at the outer peripheral side of the small transmission gear ring 44 b.

Of the two driving gears 42 connected with the tile sucking motor 41a, the small one-way gear 42a is meshed with the small transmission gear ring 44b, and the large one-way gear 42b is meshed with the large transmission gear ring 44 a; thus, two sets of gear transmission pairs are formed, and the two sets of gear transmission pairs have different output rotating speeds, so that the wheel disc 43 and the driving roller wheel 3 can be endowed with two different rotating speeds, and the magnetic mahjong tile sucking wheel 2 has two working states of slowly sucking mahjong tiles and quickly sucking mahjong tiles.

As shown in fig. 3 and 4, in the present embodiment, the height of the large transmission gear ring 44a is greater than that of the small transmission gear ring 44b, and the total height of the small one-way gear 42a and the large one-way gear 42b is preferably equivalent to that of the large transmission gear ring 44a, so that both the small one-way gear 42a and the large one-way gear 42b can be accommodated in the enclosure of the large transmission gear ring 44a in the meshed state, thereby making the overall structure more compact and reducing the overall volume.

As shown in fig. 1 and 2, the driving roller 3 and the wheel disc 43 are disposed between the first molding member 11 and the second molding member 12, and the card-sucking motor 41a and the driving gear 42 are disposed on a side of the second molding member 12 facing away from the first molding member 11, so that a through hole 12e is formed in the second molding member 12 for the output shaft of the card-sucking motor 41a to pass through, so that the small one-way gear 42a can be engaged with the small driving gear 44 b.

Meanwhile, the present embodiment provides an annular groove 12a on the side of the second molded part 12 facing the driving roller 3 for receiving the large transmission gear ring 44 a; meanwhile, a sunken groove 12b is formed on the side of the second molded part 12 facing away from the first molded part 11, and the large one-way gear 42b is located in the sunken groove 12 b; therefore, the assembled integral structure is more compact, and the transmission gear rings 44 and the driving gear 42 can be protected, dustproof and the like.

As can be seen from fig. 1 and 2, in the present embodiment, the sunken groove 12b and the annular groove 12a are concentrically arranged, the sunken groove 12b is surrounded by the annular groove 12a, but the large one-way gear 42b is eccentrically arranged in the sunken groove 12b, so that the sunken groove 12b further has a relief area 12c corresponding to the large one-way gear 42b, a through hole 12d is formed in the peripheral wall of the relief area 12c to penetrate the sunken groove 12b and the annular groove 12a, and the large one-way gear 42b can be meshed with the large transmission gear ring 44a from the through hole 12 d.

The working principle of the variable-speed tile sucking and conveying mechanism of the mahjong machine provided by the embodiment is as follows:

when the shuffling starts, the card suction motor 41a is also synchronously started, so that the magnetic card suction wheel 2 sucks the mahjong tiles on the shuffling large plate to the conveying belt. Wherein, in the early stage of shuffling, the number of mahjong tiles on the shuffling large disk is large, in order to reduce the noise of tile suction, the tile suction motor 41a rotates forwards, the gear transmission pair composed of the large one-way gear 42b and the large transmission gear ring 44a outputs the rotating speed to the wheel disk 43 and the driving roller 3, at this time, the driving roller 3 rotates slowly, and the magnetic tile suction wheel 2 also sucks tiles slowly; in the later shuffling stage, the number of mahjong tiles on the shuffling large disk is small, in order to improve the tile sucking efficiency, the tile sucking motor 41a rotates reversely, the gear transmission pair consisting of the small one-way gear 42a and the small transmission gear ring 44b outputs the rotating speed to the wheel disk 43 and the driving roller 3, at the moment, the driving roller 3 rotates rapidly, and the magnetic tile sucking wheel 2 also sucks tiles rapidly.

It is apparent that reference to "forward rotation" and "reverse rotation" in the present embodiment does not represent a specific direction of rotation, but merely states that the rotation directions of the large one-way gear 42b and the small one-way gear 42a are opposite.

Example 2

As shown in fig. 5, the structure of the variable speed tile sucking and conveying mechanism of the mahjong machine of the embodiment is basically the same as that of the embodiment 1, except that: only one transmission gear ring 44 is arranged on the wheel disc 43 which is coaxially fixed with the driving roller 3, and two driving gears 42 are arranged, wherein the two driving gears 42 are respectively in one-way transmission with the independent circumferential driver 41 and have opposite transmission directions; the first driving gear 42c is meshed with the gear ring 44, and the second driving gear 42d is in transmission with the gear ring 44 through the reversing wheel 45, that is, the second driving gear 42d is meshed with the reversing wheel 45, and the gear ring 44 is meshed with the reversing wheel 45.

Thus, when different circumferential drivers 41 are started, the wheel disc 43 and the driving roller 3 can obtain different rotating speeds, and the magnetic card attracting wheel 2 can attract cards at first at a slow speed and then at a fast speed.

Example 3

As shown in fig. 6 and 7, the variable speed tile sucking and conveying mechanism of the mahjong machine according to the embodiment has the same structure as that of the mahjong machine according to the embodiment 1, except that: all the transmission gear rings 44 on the wheel disc 43 are outer gear rings (as shown in fig. 6) or inner gear rings (as shown in fig. 7), the driving gears 42 are meshed with the corresponding transmission gear rings 44 one by one, and the transmission directions of the driving gears 42 meshed with different transmission gear rings 44 are the same, so that the wheel disc 43 is ensured to rotate towards the same direction all the time. Obviously, referring to embodiment 2, if it is required to transmit power to the same transmission gear ring 44 through two driving gears 42, the transmission directions of the two driving gears 42 still need to be ensured to be opposite, and both driving gears are in one-way transmission.

Claims (10)

1. The utility model provides a mahjong machine variable speed inhales tablet conveying mechanism, is including sending tablet support (1), its characterized in that, send tablet support (1) on rotate and be connected with magnetism and inhale tablet wheel (2) and initiative running roller (3), should magnetism inhale and be equipped with the conveyer belt between tablet wheel (2) and initiative running roller (3), initiative running roller (3) drive the rotation by variable speed drive list (4) yuan.

2. The variable-speed tile sucking and conveying mechanism of a mahjong machine according to claim 1, wherein the variable-speed driving unit (4) comprises a wheel disc (43) coaxially fixed with the driving roller (3), the wheel disc (43) is provided with at least one transmission gear ring (44), the variable-speed driving unit (4) further comprises at least two driving gears (42), at least two groups of gear transmission pairs are formed between the driving gears (42) and the transmission gear ring (44), and each gear transmission pair has different output rotating speeds.

3. The variable-speed tile sucking and conveying mechanism of a mahjong machine as claimed in claim 2, wherein the wheel disc (43) is provided with a transmission gear ring (44), the number of the driving gears (42) is two, one of the driving gears (42) is meshed with the transmission gear ring (44), and the other driving gear (42) is in transmission with the transmission gear ring (44) through a reversing wheel (45);

the two driving gears (42) are respectively in one-way transmission with the independent circumferential driver (41) and are opposite in transmission direction.

4. The variable-speed tile suction and delivery mechanism of a mahjong machine as claimed in claim 2, wherein the wheel disc (43) is provided with at least two concentrically arranged transmission gear rings (44), and each transmission gear ring (44) is meshed with at least one driving gear (42).

5. The variable-speed tile sucking and conveying mechanism of a mahjong machine according to claim 4, wherein all the transmission gear rings (44) are both inner gear rings or both outer gear rings, and each driving gear (42) is respectively transmitted with an independent circumferential driver (41).

6. The variable-speed tile sucking and conveying mechanism of the mahjong machine as claimed in claim 4, wherein the transmission gear ring (44) comprises a large transmission gear ring (44a) with an inner gear ring and a small transmission gear ring (44b) with an outer gear ring, and the driving gear (42) comprises a large one-way gear (42b) meshed with the large transmission gear ring (44a) and a small one-way gear (42a) meshed with the small transmission gear ring (44 b);

the large one-way gear (42b) and the small one-way gear (42a) are installed on the same circumferential driver (41) in a matched mode, and the large one-way gear (42b) and the small one-way gear (42a) are in one-way transmission with the circumferential driver (41) and are opposite in transmission direction.

7. The variable-speed tile sucking and conveying mechanism of a mahjong machine according to claim 6, wherein the height of the large transmission gear ring (44a) is larger than that of the small transmission gear ring (44b), the small one-way gear (42a) meshed with the small transmission gear ring (44b) is arranged at the front end of the output shaft of the circumferential driver (41), and the large one-way gear (42b) meshed with the large transmission gear ring (44a) is arranged at the rear end of the output shaft of the circumferential driver (41).

8. The variable-speed tile suction and delivery mechanism of the mahjong machine according to claim 7, wherein the tile delivery bracket (1) comprises a first molding part (11) and a second molding part (12) which are oppositely arranged, and the magnetic tile suction wheel (2) and the driving roller wheel (3) are rotatably arranged between the first molding part (11) and the second molding part (12);

an annular groove (12a) for accommodating a large transmission gear ring (44a) is formed in one side, facing the driving roller (3), of the second molded part (12), a sinking groove (12b) is formed in one side, facing away from the driving roller (3), of the second molded part (12), the large one-way gear (42b) is located in the sinking groove (12b), and a through hole (12d) which penetrates through the sinking groove (12b) and the annular groove (12a) to enable the large one-way gear (42b) to be meshed with the large transmission gear ring (44a) is formed in the second molded part (12);

a through hole (12e) for allowing an output shaft of the circumferential driver (41) to pass through is formed in the second forming piece (12), and the small one-way gear (42a) is located on one side, facing the driving roller (3), of the second forming piece (12), or the small one-way gear (42a) is located in the through hole (12e) and extends towards the side of the wheel disc (43) to be meshed with the small transmission gear ring (44 b).

9. The variable-speed tile sucking and conveying mechanism of the mahjong machine as claimed in claim 4, wherein the transmission gear ring (44) comprises a large transmission gear ring (44a) with an inner gear ring and a small transmission gear ring (44b) with an outer gear ring, and the driving gear (42) comprises a large one-way gear (42b) meshed with the large transmission gear ring (44a) and a small one-way gear (42a) meshed with the small transmission gear ring (44 b);

the large one-way gear (42b) and the small one-way gear (42a) are respectively in transmission with an independent circumferential driver (41).

10. A mahjong machine, comprising a shuffling barrel, wherein the shuffling barrel is provided with a tile sucking and conveying mechanism at four sides, and the tile sucking and conveying mechanism is the variable-speed tile sucking and conveying mechanism of the mahjong machine as claimed in any one of claims 1 to 9.

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