CN213942080U

CN213942080U - Rotary tile-poking mechanism for mahjong machine

Info

Publication number: CN213942080U
Application number: CN202021992378.1U
Authority: CN
Inventors: 王彬
Original assignee: Hangzhou Tian Tian Technology Co ltd
Current assignee: Hangzhou Tian Tian Technology Co ltd
Priority date: 2020-09-13
Filing date: 2020-09-13
Publication date: 2021-08-13
Anticipated expiration: 2030-09-13

Abstract

The utility model discloses a rotary tile shifting mechanism for a mahjong machine, which comprises a planetary gear reducer and a tile shifting device which are sequentially arranged above a shuffling big plate, wherein the tile shifting device is rotationally connected on a central shaft seat, the planetary gear reducer is sleeved on the central shaft seat and is circumferentially positioned and arranged on the central shaft seat, and the planetary gear reducer is used for driving the tile shifting device to relatively rotate relative to the shuffling big plate; the planetary gear reducer is in transmission with the power input end, a primary speed reduction transmission pair is arranged between the planetary gear reducer and the power input end, and a secondary speed reduction transmission pair is arranged between the planetary gear reducer and the mahjong shifting device. In the utility model, the planetary gear reducer and the poker card shifting device are both directly arranged above the shuffling large disc, wherein, the power input end is directly transmitted with the planetary gear reducer, so that the poker card shifting device can run more stably when having a lower rotating speed than the shuffling large disc; the planetary gear reducer is not rubbed by the poker card shifting device and the shuffling large disc, the service life is long, and the transmission between the power input end and the poker card shifting device is always stable and effective.

Description

Rotary tile-poking mechanism for mahjong machine

Technical Field

The utility model belongs to the technical field of the mahjong machine, in particular to mahjong machine is with rotatory tablet mechanism of dialling.

Background

The shuffling device of the mahjong machine generally comprises a shuffling large disc, wherein the center of the shuffling large disc is rotatably connected with a bearing seat, the bottom end of the bearing seat is fixedly connected with a base plate of the mahjong machine, the top end of the bearing seat is provided with a mahjong shifting device, and the mahjong shifting device is provided with a plurality of mahjong shifting strips extending on the top surface of the shuffling large disc.

In the traditional mahjong machine, the shuffling large plate can rotate circumferentially relative to the bearing seat under the driving of the shuffling motor, and the positions of the card shifting device and the card shifting strip are kept constant, so that the card shifting strip can be used for shifting mahjong tiles on the shuffling large plate in the rotation process of the shuffling large plate.

The mahjong machine has the following disadvantages: (1) because the position of the poker shifting strip is kept fixed in the rotation process of the shuffling big plate, the phenomena of 'dead angle for playing mahjong' and mahjong blocked between the poker shifting strip and the shuffling big plate often occur at the position of the poker shifting strip, and the shuffling process is influenced; (2) when the shuffling large disk rotates, the shuffling large disk and the card shifting strips have larger differential speed, and when more mahjong tiles exist, the mahjong tiles can continuously impact the card shifting strips, so that shuffling noise is larger.

In order to solve the problems, the Chinese patent application with the publication number of CN108031108A discloses a batch shuffling device of a mahjong machine and a shuffling method thereof, the batch shuffling device comprises a large disk and a large disk shaft seat arranged in the center of the large disk, the large disk is rotatably connected with the large disk shaft seat, the upper surface of the large disk is provided with a tile poking bar in a fitting manner, and a clutch device for controlling the large disk and the tile poking bar to synchronously rotate and relatively rotate is arranged between the tile poking bar and the large disk shaft seat.

The shuffling device has the following disadvantages: the rotating speed of the shuffling large disk is kept unchanged, the rotating state of the shuffling bars is different relative to the shuffling large disk only by controlling the shuffling bars by using the clutch, the change of the rotating state of the shuffling bars depends on the clutch, and the abrasion to parts is inevitable; when the poker bar and the large shuffling disc rotate synchronously by friction, the large shuffling disc is also abraded greatly.

On the basis, the Chinese patent application with the publication number of CN110237525A discloses a rotary tile-poking strip large disc mechanism and a mute mahjong machine, wherein the rotary tile-poking strip large disc mechanism comprises a lower large disc in a horizontal state and an umbrella-shaped upper large disc, and the lower large disc is arranged on a lower bearing seat through a lower bearing; the card-shifting device is arranged on the upper bearing seat through an upper bearing, the edge of the upper large disk is fixedly arranged on the lower large disk, and the center of the upper large disk is positioned on the periphery of the upper bearing; the planet carrier is fixedly arranged at the position where the upper bearing seat and the lower bearing seat are connected, the planet carrier is rotatably connected with a planetary wheel set, a large central wheel meshed with the planetary wheel set is arranged on the poker card shifting device, and a sun wheel meshed with the planetary wheel set is also arranged on the lower large disc.

When the motor drives the lower big disc to rotate, the sun wheel, the planetary wheel set and the big central wheel are sequentially driven, so that the power of the lower big disc is decelerated and distributed to the card poking device, and the card poking device rotates relative to the lower big disc.

The large plate mechanism for rotationally dialing the poker bars has the following disadvantages: the shuffling large disc is divided into a lower large disc and an upper large disc, and the planet carrier and the planetary wheel set are arranged in a gap between the lower large disc and the upper large disc; the planet carrier is only set to be a thin flat plate shape, and the planet carrier is clamped by the upper bearing seat and the lower bearing seat to realize circumferential positioning of the planet carrier; when the card shifting device rotates relative to the shuffling large disc, the planet carrier clamped between the upper bearing seat and the lower bearing seat bears friction from the upper bearing and the lower bearing in the whole card shuffling process, so that the service life of the planet carrier is influenced, the thickness of the planet carrier is further thinned due to long-term friction, the planet carrier is difficult to maintain circumferential positioning, and finally the transmission of a planet wheel set fails; meanwhile, because the stress area between the planet carrier and the upper bearing seat and the lower bearing seat is small, the support effect of the planet carrier on the planetary wheel set is still insufficient, and the stable operation of the planetary wheel set can be ensured only by arranging the support rollers on the outer periphery of the planet carrier.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a rotary tile shifting mechanism for a mahjong machine, which is directly arranged on the top surface of a shuffling large plate, has simple structure, does not cause great influence on the structure of the shuffling large plate, and has stable operation and long service life.

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

a rotary tile shifting mechanism for a mahjong machine comprises a planetary gear reducer and a tile shifting device which are sequentially arranged above a shuffling large disc, wherein the tile shifting device is rotationally connected to a central shaft seat, the planetary gear reducer is sleeved on the central shaft seat and circumferentially positioned, and the planetary gear reducer is used for driving the tile shifting device to rotate relative to the shuffling large disc;

the planetary gear reducer and the power input end are in transmission, a primary speed reduction transmission pair is arranged between the planetary gear reducer and the power input end, and a secondary speed reduction transmission pair is arranged between the planetary gear reducer and the card poking device.

In the rotary poker shifting mechanism of the utility model, the planetary gear reducer and the poker shifter are both directly arranged above the shuffling big disc, wherein, the power input end is directly transmitted with the planetary gear reducer, first-stage speed reduction transmission is realized through a first-stage speed reduction transmission pair, and then second-stage speed reduction transmission is realized through a second-stage speed reduction transmission pair, so that the poker shifter can run more stably when having a lower rotating speed than the shuffling big disc; meanwhile, the planet gear speed reducer has a wider assembly space on the top surface of the shuffling large disk, and after the planet gear speed reducer is directly assembled on the central shaft seat, the planet gear speed reducer does not need to bear the friction between the card poking device and the shuffling large disk, so that the service life of the card poking device can be prolonged, and the transmission between the power input end and the card poking device can be ensured to be stable and effective all the time.

In foretell mahjong machine is with rotatory tablet mechanism of dialling, planetary gear reducer include with center pin seat circumference location and the spacing planet carrier of axial, the one-level speed reduction transmission vice including rotate the one-level speed reduction planetary gear who connects on this planet carrier to and drive rotatory power input gear by the power supply, this power input gear meshes with this one-level speed reduction planetary gear mutually. Only when the carrier is circumferentially positioned, the power generated by the rotation of the power input gear can be transmitted to the primary reduction planetary gear.

In foretell mahjong machine is with rotatory tablet mechanism of dialling, the planet carrier include the planet carrier body, the central authorities of this planet carrier body have first assembly hole site, be formed with bellying or depressed area on the internal perisporium of this first assembly hole site, the periphery wall of central axis seat on be formed with the depressed area or the bellying of its adaptation. When the planet carrier is installed on the central shaft seat, the convex parts are embedded into the corresponding concave areas, and circumferential positioning of the planet carrier is formed.

In the rotary tile shifting mechanism for the mahjong machine, at least two convex parts which are uniformly distributed around the first assembling hole site are formed on the inner peripheral wall of the first assembling hole site, each convex part comprises a radial boss, and one end of each radial boss facing to the axis of the second central hole is provided with a plurality of radial positioning latch teeth; each depressed area comprises a radial groove matched with the radial boss and a radial positioning clamping groove matched with the radial positioning clamping tooth;

the bottom surfaces of the radial groove and the radial positioning clamping groove form a limiting step, the central shaft seat is fixedly connected with a locking seat on the top surface of the planet carrier, and the locking seat and the limiting step form axial limiting on the planet carrier.

When the planet carrier is axially sleeved on the central shaft seat, the radial boss, the radial groove, the radial positioning latch and the radial positioning slot which are matched with each other can realize double circumferential positioning of the planet carrier; after the radial groove and the radial positioning clamping groove are formed, the bottom surface of the radial groove and the bottom surface of the radial positioning clamping groove naturally form a limiting step positioned on the bottom surface of the convex part, and the locking seat is arranged above the planet carrier, so that the axial limiting of the planet carrier can be formed by the locking seat and the limiting step; thus, the planetary gear reducer has independent assembling space on the central shaft seat and is separated from the large shuffling plate and the large shuffling seat.

The power source for providing power for the power input gear can be the shuffling large disk directly or can be other driving structures independent of the shuffling large disk. However, in view of saving power cost and ensuring synchronous rotation of the card shifter and the large shuffling tray, in the rotary card shifting mechanism for the mahjong machine, the power source is the large shuffling tray.

In the rotary tile shifting mechanism for the mahjong machine, the secondary speed reduction transmission pair comprises a secondary speed reduction transmission gear which is rotatably connected to the planet carrier and a power output gear which is fixedly arranged on the tile shifting device, the secondary speed reduction transmission gear is meshed with the power output gear, and the secondary speed reduction transmission gear and the primary speed reduction transmission gear are coaxially arranged.

In the rotary tile shifting mechanism for the mahjong machine, the tile shifter comprises an umbrella-shaped tile shifting seat, a third assembling hole site convenient for installing a central shaft seat is formed in the center of the tile shifting seat, and the power output gear is fixedly arranged on the bottom surface of the tile shifting seat and is positioned at the outer edge of an opening of the third assembling hole site; the edge of the flaring end of the umbrella-shaped poker card poking seat is provided with a plurality of poker card poking strips. The utility model discloses to dial the tablet seat and set up to being umbelliform, then the bottom surface of dialling the tablet seat can form from last to containing the space of planet carrier down to reduce rotatory tablet mechanism and shuffle the height of big dish top surface, reduce its volume, reduce its influence to the fall back of mahjong tiles.

In the rotary tile shifting mechanism for the mahjong machine, the planet carrier body is cylindrical, the upper end and the lower end of the planet carrier body are respectively provided with the outward flanges, and a planet wheel installation space for installing the primary reduction planet gear and the secondary reduction planet gear is formed between the two outward flanges. The two outward flanges can position two ends of the central shaft of the first-stage reduction planetary gear and the central shaft of the second-stage reduction planetary gear, and the first-stage reduction planetary gear and the second-stage reduction planetary gear are more stable in operation.

When the power transmission device is in transmission with the first-stage reduction planetary gear, the power input end can input power from the outer ring side of the circumference of the first-stage reduction planetary gear, and the power input end can also input power from the inner ring side of the circumference of the first-stage reduction planetary gear. When the power input end inputs power from the inner ring side of the circumference of the first-stage reduction planetary gear, in order to realize the transmission of the power input end and the first-stage reduction planetary gear, in the rotary tile shifting mechanism for the mahjong machine, the center of the planet carrier body is provided with a second assembling hole site communicated with the first assembling hole site, and the inner diameter of the second assembling hole site is larger than that of the first assembling hole site;

the power input gear is positioned in the second assembling hole, and the planet carrier body is provided with a first through opening which is used for communicating the second assembling hole and the planet gear installing space so that the primary reduction planet gear is meshed with the power input gear.

Similarly, power take off and second grade reduction planetary gear's transmission position may be in the inner circle side or the outer lane side of second grade reduction planetary gear place circumference, when power take off and second grade reduction planetary gear transmission position are in the inner circle side of second grade reduction planetary gear place circumference, for the transmission of the two of being convenient for, in foretell mahjong machine is with rotatory tablet mechanism of dialling, the concave annular groove of dodging that is equipped with of top surface of planet carrier body, power take off gear be in this annular dodge the inslot, planet carrier body on still offer and be used for the intercommunication annular groove of dodging and planet wheel installation space so that second grade reduction planetary gear and power take off driven second run through the mouth.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

(1) in the rotary poker shifting mechanism of the utility model, the planetary gear reducer and the poker shifter are both directly arranged above the shuffling big disc, wherein, the power input end is directly transmitted with the planetary gear reducer, first-stage speed reduction transmission is realized through a first-stage speed reduction transmission pair, and then second-stage speed reduction transmission is realized through a second-stage speed reduction transmission pair, so that the poker shifter can run more stably when having a lower rotating speed than the shuffling big disc; meanwhile, the planet gear speed reducer has a wider assembly space on the top surface of the shuffling large disk, and after the planet gear speed reducer is directly assembled on the central shaft seat, the planet gear speed reducer does not need to bear the friction between the card poking device and the shuffling large disk, so that the service life of the card poking device can be prolonged, and the transmission between the power input end and the card poking device can be ensured to be stable and effective all the time.

(2) The utility model can realize the double circumferential positioning of the central shaft seat to the planet carrier by utilizing the radial boss and the radial groove, the radial positioning latch and the radial positioning slot which are matched with each other; after the radial groove and the radial positioning clamping groove are formed, the bottom surface of the radial groove and the bottom surface of the radial positioning clamping groove naturally form a limiting step positioned on the bottom surface of the convex part, and the locking seat is arranged above the planet carrier, so that the axial limiting of the planet carrier can be formed by the locking seat and the limiting step; thus, the planetary gear reducer has independent assembling space on the central shaft seat and is separated from the large shuffling plate and the large shuffling seat.

(3) The utility model discloses in, dial the tablet seat and be umbelliform, then the bottom surface of dialling the tablet seat can form from last to containing the space of planet carrier down to reduce rotatory mechanism of dialling the tablet and shuffle the height of big dish top surface, reduce its volume, reduce its influence to the fall back of mahjong tiles.

(4) The utility model discloses in, for the convenience of power input end from the inner circle side input power of one-level reduction planetary gear place circumference, planet carrier body's center second assembly hole site has, planet carrier body on offer and be used for intercommunication second assembly hole site and planet wheel installation space so that one-level reduction planetary gear and power input end driven first through-hole.

(5) The utility model discloses in, in order to realize the transmission of the two when power take off end is in the inner circle side of second grade reduction planetary gear place circumference, the concave annular groove of dodging that is equipped with of top surface of planet carrier body, the planet carrier body on still offer and be used for the intercommunication annular groove of dodging and planet wheel installation space so that second grade reduction planetary gear runs through the mouth with power take off end driven second.

Drawings

FIG. 1 is a schematic structural view of a rotary tile-poking mechanism for a mahjong machine according to the present invention;

FIG. 2 is a schematic view of an assembly structure of a poker card puller and a planetary gear reducer in the rotary poker card shifting mechanism for the mahjong machine of the utility model;

FIG. 3 is a schematic view of the transmission structure of the tile poking device and the planetary gear reducer in the rotary tile poking mechanism for the mahjong machine of the present invention;

FIG. 4 is a schematic structural view of a planetary gear reducer in the rotary tile shifting mechanism for the mahjong machine of the present invention;

FIG. 5 is a schematic structural view of a planetary gear reducer of the rotary tile-poking mechanism for a mahjong machine according to the present invention at another viewing angle;

FIG. 6 is a schematic structural view of the central shaft seat of the rotary tile shifting mechanism of the mahjong machine of the present invention.

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 rotary card-shifting mechanism for a mahjong machine of the embodiment includes a planetary gear reducer 4 and a card-shifting device 3 which are sequentially arranged above a shuffling large plate 1, wherein the planetary gear reducer 4 is used for driving the card-shifting device 3 to rotate relatively to the shuffling large plate 1.

As shown in fig. 4 and 5, in the present embodiment, the planetary gear reducer 4 includes a carrier 41, and the carrier 41 includes a carrier body 41a having a cylindrical shape, and the center of the carrier body 41a has a first fitting hole 41b for facilitating mounting of the carrier 41 on the center bearing 2.

As shown in fig. 4 and 6, and as can be seen from fig. 1 and 3, in the present embodiment, the planet carrier 41 and the central axle seat 2 are circumferentially positioned and axially limited. Wherein, the two circumferential positioning modes are as follows: the inner peripheral wall of the first fitting hole 41b is uniformly provided with three protrusions 41c, and the outer peripheral wall of the central shaft seat 2 is formed with three recessed areas 21 adapted thereto. When the planet carrier 41 is mounted on the center axle seat 2, the protrusions 41c are engaged with the corresponding recesses 21, thereby positioning the planet carrier 41 in the circumferential direction.

Specifically, each of the protruding portions 41c includes a radial boss 41ca, and one end of the radial boss 41ca facing the axis of the first mounting hole 41b is provided with a plurality of radial positioning latches 41 cb; correspondingly, each concave area 21 of the central shaft seat 2 includes a radial groove 21a adapted to the radial boss 41ca and a radial positioning slot 21b adapted to the radial positioning latch 41 cb.

When the planet carrier 41 is mounted on the central shaft seat 2, the radial boss 41ca, the radial groove 21a, the radial positioning latch 41cb and the radial positioning latch groove 21b which are nested form double circumferential positioning for the planet carrier 41, and meanwhile, the bottom surfaces of the radial groove 21a and the radial positioning latch 41cb naturally form a limit step 22 below the planet carrier 41; and the central shaft seat 2 is provided with a locking seat 6 above the planet carrier 41 through threads, and the locking seat 6 is matched with the limit step 22 to limit the axial position of the planet carrier 41 on the central shaft seat 2.

As shown in fig. 4 and 5, both ends of the carrier body 41a are provided with outward flanges 41d, and a planet wheel mounting space 44 is formed between the outward flanges 41 d. Three primary reduction planetary gears 42a are uniformly arranged in the planet wheel mounting space 44 in the circumferential direction, and two ends of the central shaft of the three primary reduction planetary gears 42a are respectively in running fit with corresponding outward turned edges 41 d; a second reduction planetary gear 43a is fixedly fitted on the central axis of one of the first reduction planetary gears 42 a.

In the present embodiment, the outer diameter of the secondary reduction planetary gear 43a is smaller than the outer diameter of the first reduction planetary gear 42a, and the width of the flanged edge 41d near the secondary reduction planetary gear 43a is smaller than the width of the flanged edge 41d near the primary reduction planetary gear 42 a; so that the sectional area of the planetary gear reducer 4 is gradually reduced from the second-stage reduction planetary gear 43a side to the first-stage reduction planetary gear 42a side, and unnecessary influence on the fall of mahjong tiles in the use process is avoided.

As shown in fig. 1, a power input gear 42b engaged with each of the first reduction planetary gears 42a is fixed to the top surface of the shuffle platter 1, and the power input gear 42b and the first reduction planetary gears 42a constitute a first reduction gear pair 42. The power input gear 42b of the present embodiment is an external gear, and the power input gear 42b is located at the inner ring of the primary reduction planetary gear 42a at the time of transmission; in order to facilitate the engagement of the power input gear 42b with the primary reduction planetary gear 42a, the planet carrier body 41a has a second assembling hole 41e at the center thereof communicating with the first assembling hole 41b, the inner diameter of the second assembling hole 41e being larger than that of the first assembling hole 41 b; when the shuffling large disk 1 and the planetary gear reducer 4 are assembled on the central shaft base 2, the power input gear 42b is positioned in the second assembling hole 41e, and meanwhile, the planet carrier body 41a is provided with a first through hole 41f for communicating the second assembling hole 41e with the planet wheel installing space 44 so that the primary reduction planetary gear 41a is meshed with the power input gear 42 b.

As shown in fig. 2 and 3 and seen in fig. 1, in this embodiment, the card shifting device 3 includes a card shifting base 31 rotatably connected to the central shaft base 2 through a bearing, the card shifting base 31 is umbrella-shaped, a third assembling hole 31a for conveniently mounting the central shaft base 2 is formed in the center of the card shifting base 31, and a plurality of card shifting strips 32 are disposed on the end edge of an opening end of the umbrella-shaped card shifting base 31.

The top surface of the poker seat 31 is also fixedly provided with an end cover 33 positioned at the end part of the central shaft seat 2 through a fastener, and the center of the end cover 33 is only provided with a fourth assembly hole position 33a for a lifting rod of a central lifting mechanism of the mahjong machine to pass through.

As shown in fig. 3, a power output gear 43b engaged with the second-stage reduction planetary gear 43a is integrally formed on the bottom surface of the poker card holder 31, the power output gear 43b is located on the outer edge of the opening of the third assembling hole 31a, and the power output gear 43b and the second-stage reduction planetary gear 43a form a second-stage reduction transmission pair 42.

The power output gear 43b of the present embodiment is also an external gear, and during transmission, the power output gear 43b is also located at the inner ring of the secondary reduction planetary gear 43 a; in order to facilitate the meshing transmission between the two gears, an annular avoiding groove 41g for accommodating the power output gear 43b is further concavely formed in the top surface of the planet carrier body 41a, and a second through hole 41h for communicating the annular avoiding groove 41g with the planet wheel mounting space 44 so that the secondary reduction planet gear 43a is meshed with the power output gear 43b is further formed in the planet carrier body 41 a.

The working principle of the rotary tile poking mechanism for the mahjong machine in the embodiment is as follows:

when the driving mechanism 5 drives the shuffling large disc 1 to rotate, the power input gear 42b synchronously rotates along with the shuffling large disc 1, and because the planet carrier 41 and the central shaft seat 2 are circumferentially positioned, the first-stage reduction planetary gear 42a meshed with the power input gear 42b rotates along with the power input 42a, so that the first-stage reduction of the shuffling large disc 1 is realized; the second-stage reduction planetary gear 43a and the first-stage reduction planetary gear 42a rotate synchronously, and the power output gear 43b meshed with the second-stage reduction planetary gear 43a also rotates along with the second-stage reduction planetary gear 43a, so that the second-stage reduction of the shuffling large plate 1 is realized, the card poking device 3 and the power output gear 43b rotate synchronously, and finally, the differential transmission of the card poking device 3 and the shuffling large plate 2 is realized.

Claims

1. A rotary tile shifting mechanism for a mahjong machine is characterized by comprising a planetary gear reducer (4) and a tile shifting device (3) which are sequentially arranged above a shuffling large disk (1), wherein the tile shifting device (3) is rotationally connected to a central shaft seat (2), the planetary gear reducer (4) is sleeved on the central shaft seat (2) and is circumferentially positioned, and the planetary gear reducer (4) is used for driving the tile shifting device (3) to rotate relative to the shuffling large disk (1);

planetary gear reducer (4) and power input end transmission and be equipped with one-level reduction gear pair (42) between the two, planetary gear reducer (4) and dial and be equipped with second grade reduction gear pair (43) between tablet ware (3).

2. The rotary tile-poking mechanism for mahjong machine according to claim 1, wherein the planetary gear reducer (4) comprises a planet carrier (41) which is circumferentially positioned and axially limited with the central shaft seat (2), the primary reduction transmission pair (42) comprises a primary reduction planetary gear (42a) which is rotationally connected with the planet carrier (41), and a power input gear (42b) which is driven by the power source to rotate, and the power input gear (42b) is meshed with the primary reduction planetary gear (42 a).

3. The rotary tile shifting mechanism for mahjong machine according to claim 2, wherein the planet carrier (41) comprises a planet carrier body (41a), the planet carrier body (41a) has a first assembling hole (41b) in the center, the inner peripheral wall of the first assembling hole (41b) is formed with a convex portion (41c) or a concave portion (21), and the outer peripheral wall of the central shaft seat (2) is formed with a concave portion (21) or a convex portion adapted thereto.

4. The rotary tile shifting mechanism for mahjong machine according to claim 3, wherein at least two convex parts are formed on the inner peripheral wall of the first assembling hole site (41b) and evenly distributed around the first assembling hole site (41b), each convex part (41c) comprises a radial boss (41ca), and one end of the radial boss (41ca) facing to the axis of the second central hole is provided with a plurality of radial positioning latch teeth (41 cb); each depressed area (21) comprises a radial groove (21a) matched with the radial boss (41ca) and a radial positioning clamping groove (21b) matched with the radial positioning clamping tooth (41 cb);

the bottom surfaces of the radial groove (21a) and the radial positioning clamping groove (21b) form a limiting step (22), the central shaft seat (2) is fixedly connected with a locking seat (6) on the top surface of the planet carrier (41), and the locking seat (6) and the limiting step (22) form axial limiting on the planet carrier (41).

5. The rotary tile-poking mechanism for mahjong machine according to claim 2, characterized in that the power source is a tile-shuffling large plate (1).

6. The rotary tile-poking mechanism for mahjong machine according to claim 3, characterized in that the secondary reduction transmission pair (43) comprises a secondary reduction planetary gear (43a) rotationally connected to the planet carrier (41), and a power output gear (43b) fixed on the tile-poking device (3), the secondary reduction planetary gear (43a) is engaged with the power output gear (43b), and the secondary reduction planetary gear (43a) is coaxially arranged with the primary reduction planetary gear (42 a).

7. The rotary tile shifting mechanism for mahjong machine according to claim 6, wherein the tile shifter (3) comprises an umbrella-shaped tile shifting seat (31), a third assembling hole (31a) for conveniently installing the central shaft seat (2) is arranged at the center of the tile shifting seat (31), the power output gear (43b) is fixedly arranged at the bottom surface of the tile shifting seat (31) and is positioned at the outer edge of the opening of the third assembling hole (31 a); the edge of the flaring end of the poker card shifting seat (31) is provided with a plurality of poker card shifting strips (32).

8. The rotary tile shifting mechanism for mahjong machine according to claim 6, wherein the planet carrier body (41a) is cylindrical, the upper and lower ends of the planet carrier body (41a) are provided with flanges (41d), and a planet wheel mounting space (44) for mounting the first-stage reduction planet gear (42a) and the second-stage reduction planet gear (43a) is formed between the flanges (41 d).

9. The rotary tile shifting mechanism for mahjong machine according to claim 8, wherein the planet carrier body (41a) has a second assembling hole site (41e) at the center thereof, which is communicated with the first assembling hole site (41b), and the inner diameter of the second assembling hole site (41e) is larger than that of the first assembling hole site (41 b);

the power input gear (42b) is located in the second assembling hole (41e), and a first through opening (41f) for communicating the second assembling hole (41e) with a planet wheel mounting space (44) so that the primary reduction planet gear (42a) is meshed with the power input gear (42b) is formed in the planet carrier body (41 a).

10. The rotary tile shifting mechanism for the mahjong machine according to claim 8, wherein the top surface of the planet carrier body (41a) is concavely provided with an annular avoiding groove (41g), the power output gear (43b) is located in the annular avoiding groove (41g), and the planet carrier body (41a) is further provided with a second through hole (41h) for communicating the annular avoiding groove (41g) with a planet wheel installation space (44) so as to facilitate transmission of the secondary reduction planet gear (43a) and the power output end.