Gear one-way transmission structure and motor assembly

Abstract

The utility model relates to gear one-way transmission, and discloses a gear one-way transmission structure and a motor assembly, the gear one-way transmission structure comprises a gear, the gear is provided with a first shaft hole; the motor is sleeved with the shaft sleeve, and an open groove is formed in the outer circumferential face of the shaft sleeve; a mounting groove is formed in the inner wall of the first shaft hole, a limiting piece is mounted in the mounting groove, and when the gear is mounted on the motor through the shaft sleeve, the limiting piece abuts against the outer circumferential face of the shaft sleeve; when the shaft sleeve rotates towards the opening direction of the open groove, the limiting piece is limited on the open groove and enables the shaft sleeve and the gear to rotate synchronously. When the shaft sleeve rotates towards the opposite direction of the opening of the open groove, the gear idles on the shaft sleeve. One-way transmission is formed through the limiting piece and the shaft sleeve, a traditional one-way bearing and a traditional one-way gear are replaced, and the gear one-way transmission structure is simple and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a one-way gear transmission, in particular to a one-way gear transmission structure and a motor assembly. Background Art

[0002] Mahjong machines use a large number of motors. One motor drives one action. For example, the rotation of the big plate, the lifting of the center, the suction wheel sucking cards, the stacking of cards by the machine head, the pushing rod pushing cards, and the lifting of the card lifting plate all require a motor as the driving source. The more motors are used, the greater the cost. Therefore, the current mahjong machines are optimizing the structure and reducing the number of motors. The forward and reverse rotation of the motor drives the movement of different mechanisms, thereby reducing the number of motors. This is a relatively conventional design. The forward and reverse rotation of the motor to transmit power will involve one-way transmission. At present, the one-way transmission of the motor is basically realized by one-way bearings. Multiple gears are installed on the output shaft of the motor, and multiple gears are installed on the output shaft through a one-way shaft, thereby realizing the one-way transmission of the gears. Although this structure can realize one-way transmission, the cost of the one-way bearing is relatively high.

[0003] There are also some that directly install one-way gears on the motor, such as the mahjong machine large plate speed change device and mahjong machine with application number 201910778512.3. The one-way gear on the motor is mainly set to provide different speeds, thereby realizing the function of shuffling and noise reduction. The gear structure is relatively complex and the price is much higher than that of ordinary gears, such as the mahjong machine large plate speed change device and mahjong machine.

[0004] In summary, the one-way transmission of the gears on the motor is widely used in mahjong machines. It can not only reduce the driving source, but also output different speeds and reduce the shuffling noise. However, both the one-way bearing and the one-way gear have relatively high costs and complex structures. Utility Model Content

[0005] The utility model aims at the shortcomings of the prior art and provides a gear one-way transmission structure and a motor assembly.

[0006] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0007] The one-way transmission structure of gears comprises a gear having a first axial hole thereon; and also comprises a shaft sleeve mounted on the motor, and an open groove is arranged on the outer circumferential surface of the shaft sleeve; an installation groove is arranged on the inner wall of the first axial hole, and a limiting member is installed in the installation groove, and when the gear is installed on the motor through the shaft sleeve, the limiting member presses against the outer circumferential surface of the shaft sleeve; when the shaft sleeve rotates in the opening direction of the open groove, the limiting member is limited on the open groove and makes the shaft sleeve and the gear rotate synchronously; when the shaft sleeve rotates in the opposite direction of the opening of the open groove, the gear idles on the shaft sleeve.

[0008] Preferably, an arc-shaped guide surface is provided at the open end of the open groove. When the gear and the sleeve rotate synchronously, the limit member enters the open groove through the guide surface; when the gear rotates idly on the sleeve, the limit member forms a relative motion on the outer circumferential surface of the sleeve through the guide surface.

[0009] Preferably, the opening groove opens in the circumferential direction, and the opening width of the opening groove gradually increases toward the opening end.

[0010] Preferably, the inner wall of the opening groove matched with the limiting member is an arc surface. Preferably, a second shaft hole for matching with the motor output shaft is installed on the sleeve, and a limiting surface for matching with the motor output shaft is provided on the second shaft hole.

[0011] Preferably, two gears are mounted on the shaft sleeve. When the shaft sleeve rotates, one of the gears rotates synchronously with the shaft sleeve, and the other gear rotates idly on the shaft sleeve.

[0012] Preferably, the sleeve includes an upper shaft portion and a lower shaft portion, both of which are equipped with gears, and both of which are provided with open grooves, and the opening direction of the open groove of the upper shaft portion is opposite to the opening direction of the open groove of the lower shaft portion.

[0013] Preferably, the limiting member is a magnetic steel.

[0014] Preferably, the limiting member is a ball bearing, which is cylindrical in shape and is installed in the installation groove through a spring.

[0015] A motor assembly includes a motor, wherein the output shaft of the motor is a shaft made of ferromagnetic material, a gear one-way transmission structure is installed on the motor, a sleeve is sleeved and radially limited on the output shaft of the motor, and a limiting body is adsorbed on the output shaft of the motor through the sleeve.

[0016] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0017] The one-way transmission is formed by the limiter and the shaft sleeve, replacing the traditional one-way bearing and one-way gear. The gear one-way transmission structure is simple and the manufacturing cost is low. When the motor drives the shaft sleeve to rotate forward and reverse, the shaft sleeve can drive one of the gears to transmit power, and the other gear idles on the shaft sleeve, so that one motor can drive different devices to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the gear structure.

[0020] Figure 3 It is a schematic diagram of the structure of the sleeve.

[0021] The parts indicated by the numbers in the above drawings are as follows:

[0022] 1—gear, 11—first shaft hole, 12—installation slot

[0023] 2-shaft sleeve, 21-opening groove, 22-guide surface, 23-second shaft hole, 24-limiting surface, 25-upper shaft portion, 26-lower shaft portion, 211-arc surface

[0024] 3—Motor DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 The utility model is further described in detail with examples.

[0026] Example 1

[0027] The one-way transmission structure of the gear comprises a gear 1 and a sleeve 2 sleeved on the motor 3, wherein the gear 1 is provided with a first axial hole 11; an open groove 21 is provided on the outer circumferential surface of the sleeve 2; a mounting groove 12 is provided on the inner wall of the first axial hole 11, and the mounting groove 12 is a cylindrical hole, in which a limit member is installed, and the limit member is a magnetic steel, which can form a magnetic connection with the output shaft of the motor 3, and the limit member can be tightly adsorbed on the sleeve 2 through the motor 3. The limit member is not marked in this schematic diagram, and when the gear 1 is installed on the motor 3 through the sleeve 2, the limit member is pressed against the outer circumferential surface of the sleeve 2; when the sleeve 2 rotates toward the opening direction of the open groove 21, the limit member will be limited on the open groove 21 and make the sleeve 2 and the gear 1 rotate synchronously, so that the gear 1 can transmit the power output by the motor 3; when the sleeve 2 rotates in the opposite direction of the opening of the open groove 21, the limit member will not be limited in the open groove 21, and the gear 1 will idle on the sleeve 2.

[0028] The open end of the open slot 21 is provided with an arc-shaped guide surface 22. When the gear 1 rotates synchronously with the shaft sleeve 2, the limiter enters the open slot 21 through the guide surface 22; when the gear 1 is idle on the shaft sleeve 2, the limiter forms a relative motion on the outer circumference of the shaft sleeve 2 through the guide surface 22. When the gear 1 is idle, the guide surface 22 enables the limiter to move relatively smoothly to the outer circumference of the shaft sleeve 2; when the shaft sleeve 2 drives the gear 1 to rotate synchronously, the guide surface 22 enables the limiter to be relatively smoothly inserted into the open slot 21.

[0029] The opening groove 21 opens in the circumferential direction, and the opening width of the opening groove 21 gradually increases toward the opening end. When the gear 1 and the shaft sleeve 2 rotate synchronously, the port of the opening groove 21 becomes larger to facilitate the limiting member to smoothly enter the opening groove 21.

[0030] The inner wall of the opening groove 21 limited by the limiting member is an arc surface 211, and the arc surface 211 matches the limiting member. The limiting member has more contact surfaces with the arc surface 211, so that the limiting member has good stability in the opening groove 21, and the shaft sleeve 2 has good stability in driving the gear 1 to rotate.

[0031] The first shaft hole 11 is a through hole, so that the gear 1 can be sleeved on the shaft sleeve 2 .

[0032] The shaft sleeve 2 is provided with a second shaft hole 23 for cooperating with the motor output shaft. The second shaft hole 23 is provided with a limiting surface 24 for cooperating with the motor output shaft. The shaft sleeve 2 can be radially limited with the motor output shaft through the limiting surface 24. The motor rotates and directly drives the shaft sleeve 2 to rotate.

[0033] Two gears 1 are mounted on the sleeve 2. When the sleeve 2 rotates, one of the gears 1 rotates synchronously with the sleeve 2, and the other gear 1 idles on the sleeve 2. When the sleeve 2 rotates forwards and reverses, it can drive one gear 1 to transmit respectively, so that the structure can drive two devices to operate.

[0034] The sleeve 2 includes an upper shaft portion 25 and a lower shaft portion 26, both of which are equipped with a gear 1, and both of which are provided with an open groove 21, the opening direction of the open groove 21 of the upper shaft portion 25 is opposite to the opening direction of the open groove 21 of the lower shaft portion 26, the transmission direction of the gear 1 on the upper shaft portion 25 is opposite to the transmission direction of the gear 1 on the lower shaft portion 26, the module of the gear 1 on the upper shaft portion 25 is greater than the module of the gear 1 on the lower shaft portion 26, that is, the sizes of the two gears 1 are different.

[0035] Example 2

[0036] The features of Example 2 are basically the same as those of Example 1, except that the limiting member is a ball bearing, which is cylindrical in shape and is installed in the installation groove 12 via a spring, and the ball bearing is pressed against the circumferential surface of the sleeve 2 via the spring.

[0037] Example 3

[0038] A motor assembly includes a motor 3, wherein the output shaft of the motor 3 is a shaft made of ferromagnetic material, the gear one-way transmission structure in Example 1 is installed on the motor 3, the shaft sleeve 2 is mounted on and radially limited on the output shaft of the motor 3, and the limiting body is adsorbed on the output shaft of the motor 3 through the shaft sleeve 2.

Claims

1. A one-way gear transmission structure, comprising a gear (1), wherein the gear (1) is provided with a first shaft hole (11); the characteristics are: The invention also comprises a shaft sleeve (2) sleeved on the motor (3), the outer circumferential surface of the shaft sleeve (2) being provided with an opening groove (21); a mounting groove (12) being provided on the inner wall of the first shaft hole (11), a limiting member being installed in the mounting groove (12); when the gear (1) is mounted on the motor (3) through the shaft sleeve (2), the limiting member is pressed against the outer circumferential surface of the shaft sleeve (2); when the shaft sleeve (2) rotates in the direction of the opening of the opening groove (21), the limiting member is limited on the opening groove (21) and the shaft sleeve (2) and the gear (1) rotate synchronously; when the shaft sleeve (2) rotates in the opposite direction of the opening of the opening groove (21), the gear (1) rotates idly on the shaft sleeve (2).

2. The one-way gear transmission structure according to claim 1, characterized in that: An arc-shaped guide surface (22) is provided at the open end of the open groove (21); when the gear (1) and the shaft sleeve (2) rotate synchronously, the limiter enters the open groove (21) through the guide surface (22); when the gear (1) rotates idly on the shaft sleeve (2), the limiter forms a relative motion on the outer circumferential surface of the shaft sleeve (2) through the guide surface (22).

3. The one-way gear transmission structure according to claim 1, characterized in that: The opening groove (21) opens in the circumferential direction, and the opening width of the opening groove (21) gradually increases toward the opening end.

4. The one-way gear transmission structure according to claim 1, characterized in that: The inner wall of the opening groove (21) matched with the limiting member is an arc-shaped surface (211).

5. The one-way gear transmission structure according to claim 1, characterized in that: A second shaft hole (23) for cooperating with the motor output shaft is installed on the shaft sleeve (2), and a limiting surface (24) for cooperating with the motor output shaft is provided on the second shaft hole (23).

6. The one-way gear transmission structure according to claim 1, characterized in that: Two gears (1) are mounted on the shaft sleeve (2). When the shaft sleeve (2) rotates, one of the gears (1) rotates synchronously with the shaft sleeve (2), and the other gear (1) rotates idly on the shaft sleeve (2).

7. The one-way gear transmission structure according to claim 6, characterized in that: The shaft sleeve (2) comprises an upper shaft portion (25) and a lower shaft portion (26), the upper shaft portion (25) and the lower shaft portion (26) are both provided with a gear (1), and the upper shaft portion (25) and the lower shaft portion (26) are both provided with an opening groove (21), and the opening direction of the opening groove (21) of the upper shaft portion (25) is opposite to the opening direction of the opening groove (21) of the lower shaft portion (26).

8. The one-way gear transmission structure according to any one of claims 1 to 7, characterized in that: The limiter is a magnetic steel.

9. The one-way gear transmission structure according to any one of claims 1 to 7, characterized in that: The limiting member is a ball bearing, which is cylindrical in shape and is installed in the installation groove (12) via a spring.

10. A motor assembly, comprising a motor (3), wherein an output shaft of the motor (3) is a shaft made of ferromagnetic material, characterized in that: The motor (3) is equipped with the one-way gear transmission structure according to claim 8, the sleeve (2) is mounted on and radially limited on the output shaft of the motor (3), and the limiting body is adsorbed on the output shaft of the motor (3) through the sleeve (2).

Images