A bearing for mahjong machine

Abstract

The present invention provides a bearing for a mahjong machine, belonging to the technical field of bearings. It solves the problem that the existing bearings are inconvenient to manufacture and expensive. The bearing for a mahjong machine includes a rotating sleeve 1, a rotating sleeve 2 and a positioning sleeve. The rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve are all made of plastic materials. The positioning sleeve and the rotating sleeve 1 are mutually sleeved. The positioning sleeve and the rotating sleeve 1 are clamped and fixed to form a rotating body. The side wall of the positioning sleeve has an annular convex edge 1, and the side wall of the rotating sleeve 1 has an annular convex edge 2. An annular groove is formed between the annular convex edge 1 and the annular convex edge 2. The side wall of the rotating sleeve 2 has an annular convex edge 3 extending into the annular groove. The rotating sleeve 2 and the rotating body can rotate independently. The bearing is light in weight and convenient to transport. Compared with metal parts, the plastic parts significantly reduce the manufacturing cost of the bearing. The bearing also omits the steel ball structure, further reducing the manufacturing cost of the bearing, making the bearing cheap.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, in particular to a bearing for a mahjong machine. Background Art

[0002] Mahjong machine is a kind of entertainment equipment commonly seen in people's daily life. Its working principle is that the mahjong tiles facing up are attracted by the magnetic ring on the shuffling barrel, rotated with the magnetic ring and transported to the conveying trough, and pushed into piles by the stacking motor at the head of the machine, and pushed away by the chain rod, so as to realize the automatic shuffling and loading of mahjong. There is a rotatable plate inside the mahjong machine, and the bearing is required during the rotation of the plate. Therefore, a plate bearing needs to be set in the mahjong machine to support the rotation of the plate. For example, a Chinese patent discloses a large plate mechanism and a silent mahjong machine [authorization announcement number: CN207989657U], which includes a bearing seat, an upper large plate and a lower large plate. The upper large plate is installed on the upper bearing, the upper bearing is installed on the upper part of the bearing seat, the lower bearing is installed on the lower part of the bearing seat, a sun gear is installed in the middle of the bearing seat, and a planetary gear set is installed on the lower large plate. The sun gear is meshed with the planetary gear set. From the content disclosed in this patent, it can be seen that the upper and lower large plates rotate synchronously with the outer ring of the bearing, and the force on the outer ring of the bearing is downward. When shuffling cards, the upper and lower large plates both run at low speed, and the rotation speed of the upper large plate is lower than that of the lower large plate. The rotation speed difference between the upper and lower large plates is used to shuffle cards.

[0003] At present, the China Patent Network discloses a special stamping bearing for mahjong machines [Authorization Announcement No.: CN206934707U], which includes a stamping outer part, a stamping inner part and a stamping rolling body. The stamping outer part and the stamping inner part are a top-bottom combined structure, the stamping rolling body is arranged in the stamping outer part, the stamping inner part is arranged on the stamping rolling body, and the edge of the stamping outer part is provided with a groove. The manufacturing process of this bearing is: the edge of the upper end of the stamping outer part is thinned by a cutting process to form a groove, and then the stamping rolling body is placed in the stamping outer part, and then the stamping inner part is placed on the stamping rolling body, and then the thinner part of the upper end of the stamping outer part is pressed into 45° to see if the stamping rolling body inside the stamping outer part matches, and after matching, the forming and sealing are performed to 90°. The manufacturing process of the bearing is complicated, the manufacturing efficiency of the bearing is low, and the patent discloses that the stamping outer part, the stamping inner part and the stamping rolling body are all made of alloy materials, and the cost of the bearing is expensive. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a bearing for a mahjong machine. The technical problem to be solved by the present invention is: how to reduce the manufacturing cost of the bearing and improve the convenience of assembly.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A bearing for a mahjong machine, comprising a rotating sleeve 1, a rotating sleeve 2 and a positioning sleeve, characterized in that the rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve are all made of plastic materials, the positioning sleeve and the rotating sleeve 1 are mutually sleeved, the positioning sleeve and the rotating sleeve 1 are clamped and fixed to form a rotating body, the side wall of the positioning sleeve has an annular convex edge 1, the side wall of the rotating sleeve 1 has an annular convex edge 2, an annular groove is formed between the annular convex edge 1 and the annular convex edge 2, the side wall of the rotating sleeve 2 has an annular convex edge 3 extending into the annular groove, and the rotating sleeve 2 and the rotating body can both rotate independently.

[0007] The bearing is composed of three plastic parts. After the rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve are completed, the rotating sleeve 1 and the positioning sleeve are clamped and fixed together to form a rotating body, so that the rotating sleeve 1 and the positioning sleeve can rotate synchronously, the annular convex edge 1 and the annular convex edge 2 limit the annular convex edge 3 up and down, and then limit the rotating sleeve 2 up and down. The rotating sleeve 2 and the rotating body can rotate relatively independently, so the rotating sleeve 2 and the rotating body are equivalent to the inner and outer rings of the bearing. During the bearing assembly process, the rotating sleeve 1 and the positioning sleeve are clamped and fixed to position the rotating sleeve 2, and the bearing assembly is completed. The bearing assembly is simple and fast, which greatly improves the bearing assembly efficiency. In addition, the bearing omits the steel ball structure, further reduces the manufacturing cost of the bearing, and makes the bearing The cost is low. In addition, since the use environment of the bearing is in a mahjong machine, the bearing is embedded in the bearing hole of the large plate of the mahjong machine, that is, the outer ring of the bearing is subjected to a downward force, so that the annular convex edge one or the annular convex edge two and the annular convex edge three are in contact with each other, thereby supporting the rotating sleeve two and the rotating body. The outer ring of the bearing rotates synchronously with the large plate. The large plate of the mahjong machine runs at a low speed during the card sorting process. Although the annular convex edge one or the annular convex edge two and the annular convex edge three are in contact with each other, the plastic parts are not easy to wear in a low-speed working environment, so that the plastic bearing also has a long service life. In addition, the weight of the bearing is lighter and convenient to transport. In addition, compared with metal parts, plastic parts significantly reduce the manufacturing cost of the bearing.

[0008] In the above-mentioned bearing for a mahjong machine, the rotating sleeve 2 is sleeved with the annular convex edge 1 or / and the annular convex edge 2. The annular convex edge 1 or / and the annular convex edge 2 guides the rotation of the rotating sleeve 2, so that the rotating sleeve 2 can rotate along the circumferential direction of the annular convex edge 1 or / and the annular convex edge 2, making the rotation of the rotating sleeve 2 more stable.

[0009] In the above-mentioned bearing for mahjong machine, the rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve are all made of polyoxymethylene material. Polyoxymethylene material is a high-density, high-crystalline linear polymer, and its wear resistance and self-lubrication are also superior to most engineering plastics, and its fatigue resistance strength is high. Since the large plate of the mahjong machine rotates at a low speed during operation, the bearing is not easy to wear even though it is made of plastic material.

[0010] In the above-mentioned bearing for mahjong machine, the annular convex edge 1 is arranged at the upper end of the positioning sleeve, the lower end of the rotating sleeve 1 has an annular convex edge 4, the upper end of the rotating sleeve 2 is sleeved with the annular convex edge, and the lower end is sleeved with the annular convex edge 4. In this structure, the annular convex edge 1 and the annular convex edge 4 play a guiding and supporting role for the upper and lower ends of the rotating sleeve 2, so that the rotating sleeve 2 can rotate along the circumferential direction of the annular convex edge 1 and the annular convex edge 4, avoiding the jamming problem during the rotation of the rotating sleeve 2 or the rotating body, so that the rotating sleeve 2 rotates stably and smoothly.

[0011] In the above-mentioned bearing for mahjong machine, the rotating sleeve is arranged on the outer peripheral surface of the positioning sleeve, the annular convex edge 1 is arranged on the outer peripheral surface of the positioning sleeve, the annular convex edge 2 is arranged on the outer peripheral surface of the rotating sleeve 1, the annular convex edge 1 and the annular convex edge 2 are arranged on the inner peripheral surface of the rotating sleeve 2, and the annular convex edge 3 is arranged on the inner peripheral surface of the rotating sleeve 2. In this structure, the rotating sleeve 1 and the positioning sleeve are fixedly connected to form a rotating body, which is equivalent to the inner ring of the bearing, and the rotating sleeve 2 is equivalent to the outer ring of the bearing.

[0012] In the above-mentioned bearing for mahjong machine, the rotating sleeve is arranged on the inner circumference of the positioning sleeve, the annular convex edge 1 is arranged on the inner circumference of the positioning sleeve, the annular convex edge 2 is arranged on the inner circumference of the rotating sleeve 1, the annular convex edge 1 and the annular convex edge 2 are arranged on the outer circumference of the rotating sleeve 2, and the annular convex edge 3 is arranged on the outer circumference of the rotating sleeve 2. In this structure, the rotating sleeve 1 and the positioning sleeve are fixedly connected to form a rotating body, which is equivalent to the outer ring of the bearing, and the rotating sleeve 2 is equivalent to the inner ring of the bearing.

[0013] In the above-mentioned bearing for a mahjong machine, a slot is provided on the side wall of the rotating sleeve 1, and a buckle is provided on the side wall of the positioning sleeve to be clamped in the slot. The buckle in this structure is a point-shaped structure, and both the rotating sleeve 1 and the positioning sleeve have a certain deformation ability. After the rotating sleeve 1 and the positioning sleeve are mutually sleeved, the buckle can be clamped into the slot by extrusion.

[0014] In the above-mentioned bearing for a mahjong machine, the clamping groove is formed on the side wall of the upper end of the rotating sleeve 1, and the clamping buckle is arranged on the upper part of the positioning sleeve and close to the position of the annular convex edge 1. In this structure, the clamping groove is located at the upper end of the rotating sleeve 1, and during the assembly and extrusion process of the positioning sleeve and the rotating sleeve 1, the upper end of the rotating sleeve 1 is easily deformed, so that the clamping buckle can be smoothly extruded into the clamping groove.

[0015] In the above-mentioned bearing for mahjong machine, the cross section of the slot and the cross section of the buckle are both triangular, the upper side wall in the slot and the upper surface of the buckle are both horizontal planes, and the lower side wall in the slot and the lower surface of the buckle are both inclined surfaces. During assembly, after one end of the positioning sleeve and one end of the rotating sleeve are mutually sleeved, the lower surface of the buckle abuts against the inner edge of one end of the rotating sleeve, and then the positioning sleeve and the rotating sleeve are squeezed hard, the lower surface of the buckle is an inclined surface, and the inclined surface plays a guiding role, so that the buckle can be smoothly squeezed into the slot, and after the buckle is stuck in the slot, the upper surface of the buckle abuts against the upper side wall in the slot, and the lower surface of the buckle abuts against the lower side wall in the slot, and the buckle is clamped in the slot, so as to realize the fixed connection between the positioning sleeve and the rotating sleeve.

[0016] In the above-mentioned bearing for a mahjong machine, the slot is annular, and there are three buckles, which are arranged at intervals along the circumferential direction on the side wall of the positioning sleeve. After the three buckles of this structure are engaged with the slot, the positioning sleeve and the rotating sleeve 1 are more firmly engaged and fixed. The slot is annular so that the positioning sleeve and the rotating sleeve 1 only need to be engaged together, and then the positioning sleeve and the rotating sleeve 1 are squeezed, so that the buckle can be directly engaged in the slot, and the assembly of the positioning sleeve and the rotating sleeve 1 is convenient and fast.

[0017] Compared with the prior art, the bearing for mahjong machines of the present invention has the following advantages: the bearing is light in weight and convenient to transport, and the plastic parts significantly reduce the manufacturing cost of the bearing compared with metal parts. The bearing also omits the steel ball structure, further reducing the manufacturing cost of the bearing, making the bearing inexpensive. In addition, during the assembly process, the rotating sleeve and the positioning sleeve are snap-fitted and fixed to position the rotating sleeve, completing the assembly of the bearing. The assembly of the bearing is simple and fast, greatly improving the assembly efficiency of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure diagram of Example 1 of the present invention.

[0019] Figure 2 It is a schematic diagram of the explosion structure of Example 1 of the present invention.

[0020] Figure 3 It is a schematic cross-sectional structure diagram of embodiment 2 of the present invention.

[0021] Figure 4 It is a schematic diagram of the explosion structure of Example 2 of the present invention.

[0022] In the figure, 1, rotating sleeve one; 11, annular convex edge two; 12, annular convex edge four; 13, slot; 13a, plane one; 13b, inclined plane one; 2, rotating sleeve two; 21, annular convex edge three; 3, positioning sleeve; 31, annular convex edge one; 32, buckle; 32a, plane two; 32b, inclined plane two; 4, rotating body; 5, annular slot. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Example 1

[0024] like Figure 1 and Figure 2 As shown, the bearing for mahjong machine comprises a rotating sleeve 1, a rotating sleeve 2 and a positioning sleeve 3, the rotating sleeve 1 is sleeved on the outer circumference of the positioning sleeve 3, the positioning sleeve 3 and the rotating sleeve 1 are clamped and fixed to form a rotating body 4, the outer circumference of the positioning sleeve 3 has an annular convex edge 1 31, the outer circumference of the rotating sleeve 1 has an annular convex edge 2 11, an annular groove 5 is formed between the annular convex edge 1 31 and the annular convex edge 2 11, the annular convex edge 1 31 or / and the annular convex edge 2 11 are sleeved on the inner circumference of the rotating sleeve 2, the inner circumference of the rotating sleeve 2 has an annular convex edge 3 21 extending into the annular groove 5, the annular convex edge 1 31 and the annular convex edge 2 11 The annular convex edge 3 21 plays the role of upper and lower limit, and then the rotating sleeve 2 2 is limited up and down. The rotating sleeve 2 2 is equivalent to the outer ring of the bearing, and the rotating body 4 is equivalent to the inner ring of the bearing. The rotating sleeve 2 2 and the rotating body 4 can rotate relatively independently. The rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve 3 are all made of polyformaldehyde material. Polyformaldehyde material is a high-density, high-crystalline linear polymer. Its wear resistance and self-lubrication are also superior to most engineering plastics, and its fatigue resistance is high. Since the large plate of the mahjong machine has a low rotation speed during operation, although the bearing is made of plastic material, it is also not easy to wear.

[0025] like Figure 1 and Figure 2 As shown, the upper end of the positioning sleeve 3 is turned outward to form an annular convex edge 1 31, and the lower end of the rotating sleeve 1 is turned outward to form an annular convex edge 4 12. The upper end of the rotating sleeve 2 is sleeved with the annular convex edge 1 31, and the lower end is sleeved with the annular convex edge 4 12. The annular convex edge 1 31 and the annular convex edge 4 12 support the upper and lower ends of the rotating sleeve 2, avoiding the jamming problem during the rotation of the rotating sleeve 2 or the rotating body 4, so that the rotating sleeve 2 can rotate stably and smoothly.

[0026] like Figure 1 and Figure 2When the locking cam 32 is engaged with the locking cam 13, the locking cam 32 is engaged with the locking cam 13 and the locking cam 32 is engaged with the locking cam 13. The slot 13 is opened on the inner circumferential surface of the upper end of the rotating sleeve 1, and the buckle 32 is arranged on the upper part of the positioning sleeve 3 and close to the annular convex edge 31. The cross-section of the slot 13 and the cross-section of the buckle 32 are both triangular, the upper side wall in the slot 13 and the upper surface of the buckle 32 are both horizontal planes, and the lower side wall in the slot 13 and the lower surface of the buckle 32 are both inclined surfaces. During assembly, after one end of the positioning sleeve 3 and one end of the rotating sleeve 1 are sleeved together, the lower surface of the buckle 32 rests on the inner edge of one end of the rotating sleeve 1, and then the positioning sleeve 3 and the rotating sleeve 1 are squeezed hard. The lower surface of the buckle 32 is an inclined surface, which plays a guiding role, so that the buckle 32 can be smoothly squeezed into the slot 13. After the buckle 32 is stuck in the slot 13, the upper surface of the buckle 32 is against the upper side wall in the slot 13, and the lower surface of the buckle 32 is against the lower side wall in the slot 13. The buckle 32 is clamped in the slot 13 to achieve a fixed connection between the positioning sleeve 3 and the rotating sleeve 1. Example 2

[0027] like Figure 3 and Figure 4As shown, the bearing for mahjong machine comprises a rotating sleeve 1, a rotating sleeve 2 and a positioning sleeve 3, the rotating sleeve 1, the rotating sleeve 2 and the positioning sleeve 3 are all made of plastic material, the rotating sleeve 1 is sleeved on the inner circumference of the positioning sleeve 3, the positioning sleeve 3 and the rotating sleeve 1 are fixedly connected to form a rotating body 4, the inner circumference of the positioning sleeve 3 has an annular convex edge 131, the inner circumference of the rotating sleeve 1 has an annular convex edge 21, an annular groove 5 is formed between the annular convex edge 131 and the annular convex edge 21, the annular convex edge 131 and / or the annular convex edge 21 are sleeved on the outer circumference of the rotating sleeve 2, the outer circumference of the rotating sleeve 2 has an annular convex edge 321 extending into the annular groove 5, the rotating body 4 is equivalent to the outer ring of the bearing, the rotating sleeve 2 is equivalent to the inner ring of the bearing, the rotating sleeve 2 and the rotating body 4 can rotate independently. The upper end of the positioning sleeve 3 is turned inward to form an annular convex edge 131, and the lower end of the rotating sleeve 1 is turned inward to form an annular convex edge 1412. The upper end of the rotating sleeve 2 is sleeved with the annular convex edge 131, and the lower end is sleeved with the annular convex edge 1412. A clamping groove 13 is provided on the outer circumference of the rotating sleeve 1, and a buckle 32 is provided on the inner circumference of the positioning sleeve 3 to be clamped in the clamping groove 13. The clamping groove 13 is annular, and there are three buckles 32. The three buckles 32 are arranged at intervals along the circumferential direction on the inner circumference of the positioning sleeve 3. The clamping groove 13 is provided on the outer circumference of the upper end of the rotating sleeve 1, and the buckle 32 is arranged on the upper part of the positioning sleeve 3 and close to the annular convex edge 131.

[0028] The assembly principle and use principle of the bearing of this embodiment are basically the same as those of the bearing of the above-mentioned embodiment 1. The structure of embodiment 1 is equivalent to the inner ring of the bearing being composed of two plastic parts and the outer ring of the bearing being composed of one plastic part. The structure of this embodiment is equivalent to the outer ring of the bearing being composed of two plastic parts and the inner ring of the bearing being composed of one plastic part. Example 3

[0029] The contents of this embodiment are basically the same as those of the above-mentioned embodiment 1, except that the slot 13 is arranged on the inner circumference of the rotating sleeve 1 , and the buckle 32 is arranged on the outer circumference of the positioning sleeve 3 . Example 4

[0030] The contents of this embodiment are basically the same as those of the above-mentioned embodiment 2, except that the slot 13 is arranged on the outer circumference of the rotating sleeve 1 , and the buckle 32 is arranged on the inner circumference of the positioning sleeve 3 .

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bearing for a mahjong machine, comprising a rotating sleeve 1 (1), a rotating sleeve 2 (2) and a positioning sleeve (3), characterized in that: The rotating sleeve 1 (1), the rotating sleeve 2 (2) and the positioning sleeve (3) are all made of plastic materials. The positioning sleeve (3) and the rotating sleeve 1 (1) are mutually sleeved. The positioning sleeve (3) and the rotating sleeve 1 (1) are clamped and fixed to form a rotating body (4). The side wall of the positioning sleeve (3) has an annular convex edge 1 (31). The side wall of the rotating sleeve 1 (1) has an annular convex edge 2 (11). An annular groove (5) is formed between the annular convex edge 1 (31) and the annular convex edge 2 (11). The side wall of the rotating sleeve 2 (2) has an annular convex edge 3 (21) extending into the annular groove (5). The rotating sleeve 2 (2) and the rotating body (4) can both rotate independently. The second rotating sleeve (2) is sleeved with the first annular protrusion (31) and / or the second annular protrusion (11); The rotating sleeve 1 (1), the rotating sleeve 2 (2) and the positioning sleeve (3) are all made of polyoxymethylene material.

2. A bearing for a mahjong machine according to claim 1, characterized in that: The annular convex edge 1 (31) is arranged at the upper end of the positioning sleeve (3), the lower end of the rotating sleeve 1 (1) has an annular convex edge 4 (12), the upper end of the rotating sleeve 2 (2) is sleeved with the annular convex edge 1 (31), and the lower end is sleeved with the annular convex edge 4 (12).

3. A bearing for a mahjong machine according to claim 1, characterized in that: The rotating sleeve 1 (1) is sleeved on the outer circumferential surface of the positioning sleeve (3), the annular convex edge 1 (31) is arranged on the outer circumferential surface of the positioning sleeve (3), the annular convex edge 2 (11) is arranged on the outer circumferential surface of the rotating sleeve 1 (1), the annular convex edge 1 (31) and the annular convex edge 2 (11) are sleeved on the inner circumferential surface of the rotating sleeve 2 (2), and the annular convex edge 3 (21) is arranged on the inner circumferential surface of the rotating sleeve 2 (2).

4. A bearing for a mahjong machine according to claim 1, characterized in that: The rotating sleeve 1 (1) is sleeved on the inner circumference of the positioning sleeve (3), the annular convex edge 1 (31) is arranged on the inner circumference of the positioning sleeve (3), the annular convex edge 2 (11) is arranged on the inner circumference of the rotating sleeve 1 (1), the annular convex edge 1 (31) and the annular convex edge 2 (11) are sleeved on the outer circumference of the rotating sleeve 2 (2), and the annular convex edge 3 (21) is arranged on the outer circumference of the rotating sleeve 2 (2).

5. A bearing for a mahjong machine according to any one of claims 1 to 4, characterized in that: A slot (13) is provided on the side wall of the rotating sleeve (1), and a buckle (32) is provided on the side wall of the positioning sleeve (3) to be locked in the slot (13).

6. A bearing for a mahjong machine according to claim 5, characterized in that: The clamping groove (13) is formed on the side wall of the upper end of the rotating sleeve (1), and the buckle (32) is arranged on the upper part of the positioning sleeve (3) and close to the annular convex edge (31).

7. A bearing for a mahjong machine according to claim 5, characterized in that: The cross-sections of the card slot (13) and the cross-sections of the buckle (32) are both triangular, the upper side wall in the card slot (13) and the upper surface of the buckle (32) are both horizontal planes, and the lower side wall in the card slot (13) and the lower surface of the buckle (32) are both inclined planes.

8. The bearing for a mahjong machine according to claim 5, characterized in that: The clamping groove (13) is annular, and there are three clamping buckles (32). The three clamping buckles (32) are arranged at intervals along the circumferential direction on the side wall of the positioning sleeve (3).

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