CN210874057U - Automatic mahjong machine and shuffle large disc device and mahjong machine large disc bearing applied to automatic mahjong machine - Google Patents
Automatic mahjong machine and shuffle large disc device and mahjong machine large disc bearing applied to automatic mahjong machine Download PDFInfo
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- CN210874057U CN210874057U CN201921092650.8U CN201921092650U CN210874057U CN 210874057 U CN210874057 U CN 210874057U CN 201921092650 U CN201921092650 U CN 201921092650U CN 210874057 U CN210874057 U CN 210874057U
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Abstract
An automatic mahjong machine, a shuffling big disk device and a mahjong machine big disk bearing applied to the automatic mahjong machine. The mahjong machine large-plate bearing comprises a gear bearing outer ring, a gear bearing sun ring, a bearing planet wheel retainer and a plurality of gear bearing planet wheels, wherein the gear bearing planet wheels are arranged in a planetary gear train, and are packaged between the gear bearing outer ring and the gear bearing sun ring through the bearing planet wheel retainer, and are simultaneously meshed with the inner teeth of the gear bearing outer ring and the outer teeth of the gear bearing sun ring, an outer ring limiting device is further arranged on the gear bearing outer ring, and a sun ring limiting device is further arranged on the gear bearing sun ring. The utility model discloses a mahjong machine when realizing shuffling big dish relative center pin seat rotation assembly, can also realize shuffling big dish and shuffle the differential transmission between big dish and the buffer plate between the card strip, whole mahjong machine big dish bearing is compacter simpler with shuffling big dish device assembly structure.
Description
Technical Field
The utility model belongs to automatic mahjong machine equipment, concretely relates to automatic mahjong machine and shuffle big dish device, mahjong machine big dish bearing of using thereof.
Background
The existing large plate bearing of the automatic mahjong machine usually adopts a ball bearing, the ball bearing is sleeved on a central shaft seat and is simultaneously embedded in the middle of a shuffling large plate, and the shuffling large plate rotates around the central shaft seat through the ball bearing. The ball bearing has complex manufacturing process, large manufacturing equipment investment and high price. The mahjong shuffling large plate of the mahjong machine is low in running speed and running load, and iron ball bearings are replaced by a part of plastic plane friction bearings for the mahjong machine, but squeal is easy to occur in the use of the plastic plane friction bearings.
Secondly, the novel rotary tile-poking strip mahjong machine needs to transmit the power of the large shuffling disc to the rotary tile-poking strip or the buffer disc through a speed changer, and has the disadvantages of complex assembly, high assembly cost and inconvenient maintenance.
Disclosure of Invention
The utility model provides a technical problem be: aiming at the defects of the large disk bearing of the existing automatic mahjong machine, the rolling plastic bearing which is suitable for the operation of the mahjong shuffling large disk of the mahjong machine, has low cost and low price, is convenient to assemble and does not generate squeaking is provided. Secondly, aiming at the defects of the prior novel rotary mahjong shifting strip mahjong machine, the rolling driving bearing or the rolling plastic driving bearing is suitable for outputting the power of the large shuffling disk to the mahjong shifting strip or the buffer disk in a transfer way when the large shuffling disk of the mahjong machine runs, and has the advantages of low cost, low price, convenient assembly and no squeaking.
The utility model discloses a following technical scheme realizes:
mahjong machine deep bid bearing, including being gear bearing outer lane, gear bearing sun circle, bearing planet wheel holder and a plurality of gear bearing planet wheel that planetary gear arranged, gear bearing planet wheel assembly is on bearing planet wheel holder to encapsulate between gear bearing outer lane and gear bearing sun circle through bearing planet wheel holder, and simultaneously with the internal tooth of gear bearing outer lane and the external tooth meshing of gear bearing sun circle, its characterized in that: the gear bearing is characterized in that a limiting device is arranged on the outer ring of the gear bearing and a limiting device is arranged on the sun ring of the gear bearing; the gear bearing planet wheel adopts a cylindrical gear planet wheel or a bevel gear planet wheel.
Furthermore, a plurality of power connecting devices are arranged on the bearing planet wheel retainer.
Further, set up a plurality of public fastener and a plurality of female fastener that correspond on the bearing planet wheel holder, bearing planet wheel holder divide into first planet wheel holder and second planet wheel holder, first planet wheel holder and second planet wheel holder are inlayed each other and are connected, the public fastener of connection on the second planet wheel holder is inlayed to public fastener on the first planet wheel holder, and the public fastener of connection on the second planet wheel holder is inlayed to the female fastener on the first planet wheel holder.
Furthermore, the limiting device on the outer ring of the gear bearing is a concave rib or/and a convex rib arranged on the periphery of the outer ring of the gear bearing, and the limiting device on the sun ring of the gear bearing is a concave rib or/and a convex rib arranged on the periphery of the sun ring of the gear bearing or an annular connecting gear arranged on the periphery of the sun ring of the gear bearing;
furthermore, the limiting device on the outer ring is a convex rib arranged on the periphery of the outer ring of the gear bearing, and the limiting device on the sun ring is an annular connecting gear arranged on the periphery of the sun ring of the gear bearing.
Further, the power connecting device is a connecting hole arranged on the bearing planet wheel retainer or a connecting rod arranged on the bearing planet wheel retainer in a protruding mode or an annular connecting gear arranged on the bearing planet wheel retainer.
Furthermore, a plurality of oil filling holes are further formed in the planet wheel retainer.
The mahjong tile shuffling large disk device comprises the mahjong tile shuffling large disk bearing and the mahjong tile shuffling large disk, wherein the mahjong tile shuffling large disk bearing outer ring and the mahjong tile shuffling large disk are embedded into a whole.
The automatic mahjong machine comprises the mahjong shuffling large disk device.
The big disc bearing of the mahjong machine of the utility model assembles the shuffling big disc and the central shaft seat through the rolling bearing, and has simple assembly, low assembly cost and no squeaking; the large shuffling plate can rotate relative to the central shaft seat and realize the differential transmission between the large shuffling plate and the buffer plate between the large shuffling plate and the shuffling strips, and the bearing assembly structure of the large shuffling plate of the mahjong machine is more compact. The novel bearing realizes the relative rotation between the bearing sun ring and the bearing outer ring through gear engagement or friction wheel friction, has smaller noise compared with the common rotating bearing, and has low cost, low price and convenient assembly and maintenance. The novel large-disk shuffling device has the characteristics of simple manufacture, assembly, storage, management and maintenance, and the assembled mahjong machine has the advantages of low shuffling noise, short mahjong arranging time and the like.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic view of a bearing structure of a mah-jong machine in an embodiment.
Fig. 2 is a schematic structural diagram of a bearing planet wheel retainer in the embodiment.
FIG. 3 is a schematic view of a bearing structure of a mah-jong machine in an embodiment.
FIG. 4 is a schematic view of the bearing structure of the mahjong machine main plate in the embodiment, which is provided with concave ribs and convex ribs.
FIG. 5 is a schematic view of a bearing structure of a mah-jong machine in an embodiment, which is provided with a connecting rod.
FIG. 6 is a schematic view of a bearing structure of a mah-jong machine according to an embodiment of the present invention, which is provided with bevel teeth.
FIG. 7 is a schematic view of the structure of the shuffling large plate of the mahjong machine in the embodiment.
FIG. 8 is a sectional view showing the structure of the shuffling large plate of the mahjong machine in the embodiment.
FIG. 9 is a schematic view of an automatic mahjong machine in an embodiment, which is provided with a poker bar.
FIG. 10 is a schematic structural view of an automatic mahjong machine in an embodiment, which is provided with a connecting rod and a poker bar. Reference numbers in the figures: 1-outer ring of gear bearing; 2-gear bearing sun ring; 3-a bearing planet wheel cage; 311-connecting hole; 312-a connecting rod; 313-ring connecting gear; 321-male fastener; 322-female fastener; 331-a first planet-gear holder; 332 planet wheel second cage; 41-gear bearing planet wheel; 412-bevel gear planets; 42-bearing planet wheel mounting holes; 5-a limiting device; 51-concave ribs; 52-convex ribs; 6-oil filling hole; 7-central axle seat; 8-shuffle large disc; 81-planet mahjong machine large disc bearing; 9-poker bar.
Detailed Description
Example one
Referring to fig. 1, a large-plate bearing of a mahjong machine in the figure is a specific embodiment of the present invention, and specifically includes a gear bearing outer ring 1, a gear bearing sun ring 2, a bearing planet wheel holder 3, a gear bearing planet wheel 41 and a limiting device 5 which are arranged in a planetary gear train; and the limiting device on the outer ring of the gear bearing and the limiting device on the sun ring of the gear bearing both adopt convex ribs 52.
Referring to fig. 2 and fig. 3 in combination, a male clamping piece 321 and a corresponding female clamping piece 322 are arranged on the bearing planet wheel holder 3, a filling hole 6 and a connecting hole 311 are further arranged on the bearing planet wheel holder 3, the bearing planet wheel holder 3 is divided into a first planet wheel holder 331 and a second planet wheel holder 332, the first planet wheel holder 331 and the second planet wheel holder 332 are connected in an embedded manner, the male clamping piece 321 on the first planet wheel holder 331 is connected with the female clamping piece 322 on the second planet wheel holder 332 in an embedded manner, and the female clamping piece 322 on the first planet wheel holder 331 is connected with the male clamping piece 321 on the second planet wheel holder 332 in an embedded manner. The gear bearing planet wheel 41 is assembled on the bearing planet wheel retainer 3, is packaged between the gear bearing outer ring 1 and the gear bearing sun ring 2 through the bearing planet wheel retainer 3, and is meshed with the inner teeth of the gear bearing outer ring 1 and the outer teeth of the gear bearing sun ring 2 at the same time to form a planetary gear train arrangement.
With reference to fig. 9, during assembly, the gear bearing sun ring 2 is fixedly sleeved on the central shaft seat 7 and assembled with a central shaft seat groove (not shown) through the convex rib 52, the gear bearing outer ring 1 is fixedly sleeved at the middle part of the shuffling large disk 8, and the shuffling large disk 8 circumferentially rotates around the central shaft seat 7 through the convex rib 52 and the shuffling large disk groove (not shown); the poker bar 9 is fixedly connected on the central shaft seat 7 and does not rotate.
The large disc bearing in the embodiment has the function of a rolling bearing, and a planetary gear train formed in the large disc bearing can realize circumferential rotation between the shuffling large disc 8 and the central shaft seat 7. Relative rotation between the outer ring 1 of the gear bearing and the sun ring 2 of the gear bearing in the large-disc bearing is realized through rolling engagement of the planet gear 41 of the gear bearing, and noise and wear are lower.
Example two
Referring to fig. 4, the large-plate bearing of the mahjong machine in the figure is a specific embodiment of the present invention, and specifically includes a gear bearing outer ring 1, a gear bearing sun ring 2, a bearing planet wheel holder 3, a gear bearing planet wheel 41 and a limiting device 5 which are arranged in a planetary gear train; the gear bearing outer ring upper limiting device and the gear bearing sun ring upper limiting device simultaneously adopt a concave rib 51 and a convex rib 52.
Referring to fig. 2 and fig. 3 in combination, a male clamping piece 321 and a corresponding female clamping piece 322 are arranged on the bearing planet wheel holder 3, an oil filling hole 6 is further arranged on the bearing planet wheel holder 3, the bearing planet wheel holder 3 is divided into a first planet wheel holder 331 and a second planet wheel holder 332, the first planet wheel holder 331 and the second planet wheel holder 332 are connected in an embedded manner, the male clamping piece 321 on the first planet wheel holder 331 is connected with the female clamping piece 322 on the second planet wheel holder 332 in an embedded manner, and the female clamping piece 322 on the first planet wheel holder 331 is connected with the male clamping piece 321 on the second planet wheel holder 332 in an embedded manner. The gear bearing planet wheel 41 is assembled on the bearing planet wheel retainer 3, is packaged between the gear bearing outer ring 1 and the gear bearing sun ring 2 through the bearing planet wheel retainer 3, and is meshed with the inner teeth of the gear bearing outer ring 1 and the outer teeth of the gear bearing sun ring 2 at the same time to form a planetary gear train arrangement.
With reference to fig. 9, during assembly, the gear bearing sun ring 2 is fixedly sleeved on the central shaft seat 7 and is respectively assembled with a convex rib and a groove (not shown) of the central shaft seat through a concave rib 51 and a convex rib 52, the gear bearing outer ring 1 is fixedly sleeved at the middle part of the shuffling large disk 8 and is respectively assembled with the convex rib and the groove (not shown) of the shuffling large disk through the concave rib 51 and the convex rib 52, and the shuffling large disk 8 circumferentially rotates around the central shaft seat 7; the poker bar 9 is fixedly connected on the central shaft seat 7 and does not rotate.
The large disc bearing in the embodiment has the function of a rolling bearing, and a planetary gear train formed in the large disc bearing can realize circumferential rotation between the shuffling large disc 8 and the central shaft seat 7. Relative rotation between the outer ring 1 of the gear bearing and the sun ring 2 of the gear bearing in the large-disc bearing is realized through rolling engagement of the planet gear 41 of the gear bearing, and noise and wear are lower.
EXAMPLE III
Referring to fig. 5, the large-plate bearing of the mahjong machine in the figure is a specific embodiment of the present invention, and specifically includes a gear bearing outer ring 1, a gear bearing sun ring 2, a bearing planet wheel holder 3, a gear bearing planet wheel 41 and a limiting device 5 which are arranged in a planetary gear train; the gear bearing outer ring upper limiting device and the gear bearing sun ring upper limiting device both adopt convex ribs 52, and a connecting rod 312 is arranged on the bearing planet wheel retainer 3.
Referring to fig. 2 and fig. 3 in combination, a male clamping piece 321 and a corresponding female clamping piece 322 are arranged on the bearing planet wheel holder 3, an oil filling hole 6 is further arranged on the bearing planet wheel holder 3, the bearing planet wheel holder 3 is divided into a first planet wheel holder 331 and a second planet wheel holder 332, the first planet wheel holder 331 and the second planet wheel holder 332 are connected in an embedded manner, the male clamping piece 321 on the first planet wheel holder 331 is connected with the female clamping piece 322 on the second planet wheel holder 332 in an embedded manner, and the female clamping piece 322 on the first planet wheel holder 331 is connected with the male clamping piece 321 on the second planet wheel holder 332 in an embedded manner. The gear bearing planet wheel 41 is assembled on the bearing planet wheel retainer 3, is packaged between the gear bearing outer ring 1 and the gear bearing sun ring 2 through the bearing planet wheel retainer 3, and is meshed with the inner teeth of the gear bearing outer ring 1 and the outer teeth of the gear bearing sun ring 2 at the same time to form a planetary gear train arrangement.
Referring to fig. 10 in combination, during assembly, the gear bearing sun ring 2 is fixedly sleeved on the central shaft seat 7 and assembled with a central shaft seat groove (not shown) through the convex rib 52, the gear bearing outer ring 1 is fixedly sleeved at the middle part of the shuffling large disk 8, and the shuffling large disk 8 circumferentially rotates around the central shaft seat 7 through the convex rib 52 and the shuffling large disk groove (not shown); the bearing planet wheel retainer 3 is provided with a connecting rod 312, the card-shifting strip 9 is provided with a connecting hole corresponding to the connecting rod 312, the card-shifting strip 9 is connected to the connecting rod 312 in an embedded manner through the connecting hole, and is sleeved on the central shaft seat 7 and can rotate around the central shaft seat 7 along with the bearing planet wheel retainer 3 and the connecting rod 312.
The large disc bearing in the embodiment has the function of a rolling bearing, a planetary gear train formed inside the large disc bearing can realize circumferential rotation between the shuffling large disc 8 and the central shaft seat 7, and meanwhile, the planetary gear train formed inside the large disc bearing can realize circumferential differential rotation between the shuffling large disc 8 and the shuffling bars 9; specifically, a shuffling large disk 8 connected with the outer ring 1 of the gear bearing is used as an input end, a large disk driving motor and a gear transmission system are in transmission connection with a large disk driving gear ring on the shuffling large disk 8 to drive the shuffling large disk 8 to rotate, and meanwhile, the rotary power of the shuffling large disk 8 is transmitted to the outer ring 1 of the gear bearing to synchronously rotate. Because the gear bearing sun ring 2 is locked and fixed relative to the central shaft seat 7, the bearing planet wheel retainer 3 which is used as a planet carrier is a power output end through the transmission principle of a planet gear, and drives the poker card shifting strip 9 to actively rotate at a differential speed relative to the card shuffling large disc 8.
Relative rotation between the outer ring 1 of the gear bearing and the sun ring 2 of the gear bearing in the large-disc bearing is realized through rolling engagement of the planet gear 41 of the gear bearing, and noise and wear are lower.
Example four
Referring to fig. 6, the large-plate bearing of the mahjong machine in the figure is a specific embodiment of the present invention, and specifically includes a gear bearing outer ring 1, a gear bearing sun ring 2, a bearing planet wheel holder 3, a gear bearing planet wheel 41 and a limiting device 5 which are arranged in a planetary gear train; the limiting device on the outer ring of the gear bearing adopts a convex rib 52, the limiting device on the sun ring of the gear bearing adopts an annular connecting gear 313, and the bearing planet wheel retainer 3 is provided with a connecting rod 312 and a connecting hole 311.
With combined reference to fig. 10, the bevel gear planet wheels 412 are mounted on a bearing planet wheel holder 3 and are enclosed by the bearing planet wheel holder 3 between a gear bearing outer ring 1 and a gear bearing sun ring 2 and are simultaneously meshed with the inner teeth of the gear bearing outer ring 1 and the outer teeth of the gear bearing sun ring 2 to form a planetary gear train arrangement.
During assembly, the gear bearing sun ring 2 is fixedly sleeved on the central shaft seat 7 through the annular connecting gear 313 and assembled with a central shaft seat groove (not shown in the figure) through the convex rib 52, the gear bearing outer ring 1 is fixedly sleeved at the middle part of the shuffling large disk 8 and assembled with the shuffling large disk groove (not shown in the figure) through the convex rib 52, and the shuffling large disk 8 rotates around the central shaft seat 7 in the circumferential direction; the card-poking strip 9 is connected to the bearing planet wheel retainer 3 through the connecting rod 312 and the connecting hole 311 in an embedding manner, is sleeved on the central shaft seat 7 and can rotate around the central shaft seat 7 along with the bearing planet wheel retainer 3.
The large disc bearing in the embodiment has the function of a rolling bearing, a planetary gear train formed inside the large disc bearing can realize circumferential rotation between the shuffling large disc 8 and the central shaft seat 7, and meanwhile, the planetary gear train formed inside the large disc bearing can realize circumferential differential rotation between the shuffling large disc 8 and the shuffling bars 9; specifically, a shuffling large disk 8 connected with the outer ring 1 of the gear bearing is used as an input end, a large disk driving motor and a gear transmission system are in transmission connection with a large disk driving gear ring on the shuffling large disk 8 to drive the shuffling large disk 8 to rotate, and meanwhile, the rotary power of the shuffling large disk 8 is transmitted to the outer ring 1 of the gear bearing to synchronously rotate. Because the gear bearing sun ring 2 is locked and fixed relative to the central shaft seat 7, the bearing planet wheel retainer 3 which is used as a planet carrier is a power output end through the transmission principle of a planet gear, and drives the poker card shifting strip 9 to actively rotate at a differential speed relative to the card shuffling large disc 8.
Relative rotation between the outer ring 1 of the gear bearing and the sun ring 2 of the gear bearing in the large-disc bearing is realized through rolling of the bevel gear planet wheels 412, and noise is lower.
EXAMPLE five
Referring to fig. 7 and 8, the mahjong tile shuffling big-disk device in the illustration is a specific embodiment of the present invention, and specifically includes a shuffling big-disk 8 and a planet mahjong tile machine big-disk bearing 81, where the planet mahjong tile machine big-disk bearing 81 includes a gear bearing outer ring 1, a gear bearing sun ring 2, a bearing planet wheel holder 3, a gear bearing planet wheel 41 and a limiting device 5 arranged in a planetary gear train; the gear bearing outer ring upper limiting device and the gear bearing sun ring upper limiting device both adopt convex ribs 52, a connecting hole 311 is formed in the bearing planet wheel retainer 3, and a connecting rod 312 can be further arranged.
The other steps are the same as those of the third embodiment.
The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (8)
1. Mahjong machine deep bid bearing, including being gear bearing outer lane, gear bearing sun circle, bearing planet wheel holder and a plurality of gear bearing planet wheel that planetary gear arranged, gear bearing planet wheel assembly is on bearing planet wheel holder to encapsulate between gear bearing outer lane and gear bearing sun circle through bearing planet wheel holder, and simultaneously with the internal tooth of gear bearing outer lane and the external tooth meshing of gear bearing sun circle, its characterized in that: the gear bearing is characterized in that a limiting device is arranged on the outer ring of the gear bearing and a limiting device is arranged on the sun ring of the gear bearing; the gear bearing planet wheel adopts a cylindrical gear planet wheel or a bevel gear planet wheel.
2. The mahjong machine large plate bearing of claim 1, wherein: and the bearing planet wheel retainer is provided with a plurality of power connecting devices.
3. The mahjong machine large plate bearing of claim 1, wherein: set up a plurality of public fastener and a plurality of female fastener that correspond on the bearing planet wheel holder, bearing planet wheel holder divide into first planet wheel holder and second planet wheel holder, first planet wheel holder and second planet wheel holder are inlayed each other and are connected, the public fastener of connection on the second planet wheel holder is inlayed to public fastener on the first planet wheel holder, and the public fastener of connection on the second planet wheel holder is inlayed to the female fastener on the first planet wheel holder.
4. The mahjong machine large plate bearing of claim 1, wherein: the limiting device on the outer ring of the gear bearing is a concave rib or/and a convex rib arranged on the periphery of the outer ring of the gear bearing, and the limiting device on the sun ring of the gear bearing is a concave rib or/and a convex rib arranged on the periphery of the sun ring of the gear bearing or an annular connecting gear arranged on the periphery of the sun ring of the gear bearing.
5. The mahjong machine large plate bearing of claim 4, wherein: the limiting device on the outer ring is a convex rib arranged on the periphery of the outer ring of the gear bearing, and the limiting device on the sun ring is an annular connecting gear arranged on the periphery of the sun ring of the gear bearing.
6. The mahjong machine large plate bearing of claim 2, wherein: the power connecting device is a connecting hole arranged on the bearing planet wheel retainer or a connecting rod arranged on the bearing planet wheel retainer in a protruding mode or an annular connecting gear arranged on the bearing planet wheel retainer.
7. Big dish device of mahjong machine shuffling which characterized in that: the bearing comprises the bearing of the mahjong machine large plate as claimed in any one of claims 1 to 6, and further comprises a shuffling large plate, wherein the outer ring of the bearing of the mahjong machine large plate and the shuffling large plate are embedded into a whole.
8. Automatic mahjong machine, its characterized in that: the mahjong shuffling large disk device of the mahjong machine of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921092650.8U CN210874057U (en) | 2019-07-12 | 2019-07-12 | Automatic mahjong machine and shuffle large disc device and mahjong machine large disc bearing applied to automatic mahjong machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921092650.8U CN210874057U (en) | 2019-07-12 | 2019-07-12 | Automatic mahjong machine and shuffle large disc device and mahjong machine large disc bearing applied to automatic mahjong machine |
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| Publication Number | Publication Date |
|---|---|
| CN210874057U true CN210874057U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921092650.8U Active CN210874057U (en) | 2019-07-12 | 2019-07-12 | Automatic mahjong machine and shuffle large disc device and mahjong machine large disc bearing applied to automatic mahjong machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112190917A (en) * | 2020-09-13 | 2021-01-08 | 杭州天计科技有限公司 | Shuffling device of mahjong machine |
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2019
- 2019-07-12 CN CN201921092650.8U patent/CN210874057U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112190917A (en) * | 2020-09-13 | 2021-01-08 | 杭州天计科技有限公司 | Shuffling device of mahjong machine |
| CN112190917B (en) * | 2020-09-13 | 2023-10-27 | 杭州天计科技有限公司 | Shuffling device of mahjong machine |
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