Plastic planetary gear reducer

Abstract

The utility model relates to a plastic planetary gear reducer which comprises a gear box, a switching gear driving device, a switching gear, a switching gear pin shaft, a gear box pin shaft, a first-stage gear set, a second-stage gear set and a third-stage gear set. The first-stage gear set, the second-stage gear set and the third-stage gear set are sequentially arranged along the gear box pin shaft, the first-stage gear set comprises a left side gear ring, a first-stage sun gear and a planet gear set, the second-stage gear set comprises a middle gear ring, a sun gear carrier and a planet gear set, and the third-stage gear set comprises a right side gear ring, a sun gear carrier and a planet gear set. The planetary gear set comprises a planetary gear holder and a plurality of planetary gears arranged in the planetary gear holder, a sun gear is arranged in the middle of the sun gear carrier, the planetary gear holder and the adjacent sun gear carrier are correspondingly connected and can rotate synchronously, and the plastic planetary gear reducer is high in transmission efficiency and control precision and compact in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of banknote counting machine equipment, in particular to a plastic planetary gear reducer. Background Art

[0002] With the development of society, planetary gear reducers, due to their excellent performance and wide applicability, have become important in transmission systems across various fields. Their applications range from engineering machinery, ships, and rail transportation to robotics and automated equipment. Their primary function is to reduce the output speed of an engine or motor and increase torque, providing the output speed and torque required by the equipment. Banknote counters also contain planetary gear reducers.

[0003] The planetary gear reducers in banknote counting machines on the market have the following main problems: low transmission efficiency and insufficient control accuracy, which will lead to a high failure rate and greatly affect the efficiency and accuracy of banknote counting. Utility Model Content

[0004] In view of the above problems, the utility model proposes a plastic planetary gear reducer with high transmission efficiency, high control precision and compact structure.

[0005] The utility model is realized through the following technical solution: a plastic planetary gear reducer, comprising a gear box, a transfer gear driving device, a transfer gear, a transfer gear pin shaft, a gear box pin shaft, a first-stage gear set, a second-stage gear set, and a third-stage gear set.

[0006] Furthermore, the gear box includes a left shell and a right shell that are plugged into each other.

[0007] The transfer gear pin is arranged in the middle of the gear box, the gear box pin is arranged in the upper part of the gear box, the transfer gear is sleeved on one end of the transfer gear pin and can rotate under the action of the transfer gear driving device to provide driving force for the entire reducer.

[0008] In order to realize automatic control of the reduction gearbox and provide a more stable and reliable power source for the reduction gearbox, the transfer gear driving device further includes a motor and a driving wheel, and the driving wheel is connected to the output end of the motor and meshes with the transfer gear.

[0009] In order to more accurately monitor the position and speed of the motor and thus better control the movement of the motor, a circuit board and a code disk are connected to one end of the motor.

[0010] In order to improve the transmission efficiency and control accuracy of the reducer, so as to improve the efficiency and accuracy of banknote counting, the interior of the plastic planetary gear reducer is designed as a three-layer planetary gear structure. Specifically, the first-stage gear set, the second-stage gear set, and the third-stage gear set are arranged in sequence along the gearbox pin shaft. The first-stage gear set includes a left ring gear, a first-stage sun gear, and a planetary gear set. The second-stage gear set includes an intermediate ring gear, a sun gear carrier, and a planetary gear set. The third-stage gear set includes a right ring gear, a sun gear carrier, and a planetary gear set. The planetary gear sets and the sun gear carrier are arranged at intervals in the same direction away from the first-stage sun gear.

[0011] Furthermore, the planetary gear set includes a planetary gear holder and several planetary gears arranged in the planetary gear holder, a fixedly connected sun gear is provided in the middle of the sun gear holder, the planetary gear holder is correspondingly connected to the adjacent sun gear holder and can rotate synchronously, the first-stage sun gear is sleeved on one end of the gear box pin shaft and one side of the first-stage sun gear is meshed with the transfer gear, the sun gear holder is sleeved on the gear box pin shaft, the sun gear on the other side of the first-stage sun gear and on the sun gear holder are respectively meshed with the corresponding planetary gears, and the left ring gear, the middle ring gear, and the right ring gear are respectively arranged on the periphery of the corresponding planetary gear set and meshed with the corresponding planetary gears.

[0012] To improve structural compactness and connection reliability, the planetary gear holder is specifically configured with a plurality of planetary gear shafts distributed circumferentially. The planetary gear sleeves are mounted on the planetary gear shafts, each of which has a planetary gear shaft hole. A plurality of sun gear carrier connecting shafts are distributed on one side of the sun gear carrier corresponding to the positions of the planetary gear shaft holes. The planetary gear holder is connected to adjacent sun gear carriers via the planetary gear shaft holes and the sun gear carrier connecting shafts. The left, middle, and right ring gears are connected via snap fasteners.

[0013] Furthermore, the three-stage gear set also includes an end retainer, and the end retainer has a plurality of end retainer connecting shafts distributed corresponding to the positions of the planetary gear axle holes. The end retainer is connected to the sun gear carrier of the three-stage gear set through the corresponding planetary gear axle holes and the end retainer connecting shafts.

[0014] In order to improve the transmission smoothness, it is preferred that each group of the planetary gear sets includes three planetary gears, and the planetary gear shafts on the planetary gear holder, the sun gear holder connecting shaft on the sun gear holder, and the end holder connecting shaft of the end holder respectively have three. Depending on the actual situation, more or fewer planetary gears and a corresponding number of planetary gear shafts, sun gear holder connecting shafts, and end holder connecting shafts can also be designed.

[0015] The beneficial effects of the utility model are as follows: the plastic planetary gear reducer greatly improves the transmission efficiency and control accuracy of the reducer by designing a three-layer planetary gear structure, thereby reducing the failure rate of the banknote counter and improving the working efficiency and accuracy of the banknote counter; by optimizing the structure and connection of the planetary gear holder and the sun gear frame, the compactness of the entire reducer structure is improved; in addition, the plastic planetary gear reducer has stable operation and a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1-2 This is a structural diagram of the plastic planetary gear reducer of the present utility model;

[0017] Figure 3 for Figure 2 sectional view of

[0018] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A;

[0019] Figure 5 This is an exploded schematic diagram of the first-stage gear set, the second-stage gear set, and the third-stage gear set of the plastic planetary gear reducer of the utility model;

[0020] In the figure: 1. Gearbox; 11. Left side housing; 12. Right side housing; 2. Adapter gear drive; 21. Motor; 22. Drive wheel; 23. Circuit board; 24. Code disk; 3. Adapter gear; 4. Adapter gear pin; 5. Gearbox pin; 6. Primary gear set; 61. Left ring gear; 62. Primary sun gear; 7. Secondary gear set; 71. Intermediate ring gear; 8. Third stage gear set; 81. Right side ring gear; 82. End retainer; 821. End retainer connecting shaft; 9. Planetary gear set; 91. Planetary gear retainer; 911. Planetary gear axle; 9111. Planetary gear axle hole; 92. Planetary gear; 10. Sun gear carrier; 101. Sun gear; 102. Sun gear carrier connecting shaft. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] like Figure 1-4The plastic planetary gear reducer shown includes a gearbox 1, a transfer gear drive device 2, a transfer gear 3, a transfer gear pin 4, a gearbox pin 5, a first-stage gear set 6, a second-stage gear set 7, and a third-stage gear set 8. The gearbox 1 includes a left-side housing 11 and a right-side housing 12 that are plugged into each other. The transfer gear drive device 2 includes a motor 21 and a drive wheel 22. One end of the motor 21 is connected to a circuit board 23 and a code disk 24. The drive wheel 22 is connected to the output end of the motor 21 and meshes with the transfer gear 3.

[0023] The transfer gear pin shaft 4 is arranged in the middle of the gear box 1, and the gear box pin shaft 5 is arranged on the upper part of the gear box 1. The transfer gear 3 is sleeved on one end of the transfer gear pin shaft 4 and can rotate under the action of the transfer gear driving device 2. The first-stage gear set 6, the second-stage gear set 7, and the third-stage gear set 8 are arranged in sequence along the gear box pin shaft 5. The first-stage gear set 6 includes a left ring gear 61, a first-stage sun gear 62, and a planetary gear set 9. The second-stage gear set 7 includes an intermediate ring gear 71, a sun gear carrier 10, and a planetary gear set 9. The third-stage gear set 8 includes a right ring gear 81, a sun gear carrier 10, a planetary gear set 9, and an end retainer 82.

[0024] The planetary gear set 9 and the sun gear carrier 10 are arranged in the same direction away from the primary sun gear 62. The planetary gear set 9 includes a planetary gear holder 91 and three planetary gears 92 arranged in the planetary gear holder 91. The middle part of the sun gear carrier 10 has a fixedly connected sun gear 101. The planetary gear holder 91 is evenly distributed with three planetary gear shafts 911 along the circumferential direction. The planetary gears 92 are sleeved on the planetary gear shafts 911. The planetary gear shafts 911 are provided with planetary gear shaft holes 9111. One side of the sun gear carrier 10 corresponds to Three sun gear carrier connecting shafts 102 are evenly distributed at the position of the planetary gear shaft hole 9111, and the planetary gear retainer 91 is correspondingly connected to the adjacent sun gear carrier 10 through the planetary gear shaft hole 9111 and the sun gear carrier connecting shaft 102 and can rotate synchronously. The end retainer 82 has three end retainer connecting shafts 821 evenly distributed corresponding to the position of the planetary gear shaft hole 9111, and the end retainer 82 is connected to the sun gear carrier 10 of the three-stage gear set 8 through the corresponding planetary gear shaft hole 9111 and the end retainer connecting shaft 821.

[0025] The first-stage sun gear 62 is sleeved on one end of the gearbox pin shaft 5 and one side of the first-stage sun gear 62 is meshed with the transfer gear 3. The sun gear carrier 10 is sleeved on the gearbox pin shaft 5. The other side of the first-stage sun gear 62 and the sun gear 101 on the sun gear carrier 10 are respectively meshed with the corresponding planetary gears 92. The left ring gear 61, the middle ring gear 71, and the right ring gear 81 are respectively arranged on the periphery of the corresponding planetary gear set 9 and meshed with the corresponding planetary gears 92. The left ring gear 61, the middle ring gear 71, and the right ring gear 81 are respectively connected by snap fasteners.

[0026] The working principle of the plastic planetary gear reducer is as follows: the motor 21 is started, the driving wheel 22 drives the transfer gear 3 to rotate, and the first-stage sun gear 62 meshing with it rotates around the gear box pin 5, driving the planetary gears 92 of the first-stage gear set 6 to rotate around the planetary gear shaft 911; at the same time, the planetary gear holder 91 of the first-stage gear set 6 rotates, driving the sun gear carrier 10 of the second-stage gear set 7 to rotate, and the planetary gears 92 of the second-stage gear set 7 rotate around the planetary gear shaft 911; at the same time, the planetary gear holder 91 of the second-stage gear set 7 rotates, driving the sun gear carrier 10 of the third-stage gear set 8 to rotate, and the planetary gears 92 of the third-stage gear set 8 rotate around the planetary gear shaft 911.

[0027] The planetary gears 92 in the first-stage gear set 6, the second-stage gear set 7, and the third-stage gear set 8 rotate around their respective planetary gear shafts 911, and revolve along the internal teeth of the left ring gear 61, the middle ring gear 71, and the right ring gear 81, driving the left ring gear 61, the middle ring gear 71, and the right ring gear 81 to rotate, thereby realizing power transmission and deceleration.

[0028] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "set," and "provided with" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A plastic planetary gear reducer, characterized in that: It includes a gearbox, a transfer gear driving device, a transfer gear, a transfer gear pin shaft, a gearbox pin shaft, a primary gear set, a secondary gear set, and a tertiary gear set. The transfer gear pin shaft is arranged in the middle of the gearbox, and the gearbox pin shaft is arranged on the upper part of the gearbox. The transfer gear is sleeved on one end of the transfer gear pin shaft and can rotate under the action of the transfer gear driving device. The primary gear set, the secondary gear set, and the tertiary gear set are arranged in sequence along the gearbox pin shaft. The primary gear set includes a left ring gear, a primary sun gear, and a planetary gear set. The secondary gear set includes an intermediate ring gear, a sun gear carrier, and a planetary gear set. The tertiary gear set includes a right ring gear, a sun gear carrier, and a planetary gear set. The planetary gear set and the sun gear carrier are arranged in the same direction and spaced apart in a direction away from the primary sun gear. The planetary gear set includes a planetary gear holder and a plurality of planetary gears arranged in the planetary gear holder. A fixed sun gear is provided in the middle of the sun gear holder. The planetary gear holder is correspondingly connected to the adjacent sun gear holder and can rotate synchronously. The first-stage sun gear is sleeved on one end of the gearbox pin shaft and one side of the first-stage sun gear is meshed with the transfer gear. The sun gear carrier is sleeved on the gearbox pin shaft. The sun gears on the other side of the first-stage sun gear and on the sun gear carrier are respectively meshed with the corresponding planetary gears. The left ring gear, the middle ring gear, and the right ring gear are respectively arranged on the periphery of the corresponding planetary gear set and meshed with the corresponding planetary gears.

2. The plastic planetary gear reducer according to claim 1, characterized in that: A plurality of planetary gear shafts are evenly distributed along the circumferential direction on the planetary gear holder, the planetary gear sleeves are arranged on the planetary gear shafts, planetary gear shafts are provided with planetary gear shaft holes, a plurality of sun gear carrier connecting shafts are evenly distributed on one side of the sun gear carrier corresponding to the positions of the planetary gear shaft holes, and the planetary gear holder is correspondingly connected to the adjacent sun gear carrier through the planetary gear shaft holes and the sun gear carrier connecting shafts.

3. The plastic planetary gear reducer according to claim 1, characterized in that: The left gear ring, the middle gear ring and the right gear ring are connected by snap fasteners.

4. The plastic planetary gear reducer according to claim 2, characterized in that: The three-stage gear set also includes an end retainer, which has a plurality of end retainer connecting shafts distributed evenly corresponding to the positions of the planetary gear axle holes. The end retainer is connected to the sun gear carrier of the three-stage gear set through the corresponding planetary gear axle holes and the end retainer connecting shafts.

5. The plastic planetary gear reducer according to claim 4, characterized in that: Each of the planetary gear sets includes three planetary gears, and each of the planetary gear shafts on the planetary gear holder, the sun gear holder connecting shaft on the sun gear holder, and the end holder connecting shaft of the end holder has three corresponding ones.

6. The plastic planetary gear reducer according to claim 1, characterized in that: The transfer gear driving device includes a motor and a driving wheel, wherein the driving wheel is connected to the output end of the motor and meshes with the transfer gear.

7. The plastic planetary gear reducer according to claim 6, characterized in that: One end of the motor is connected to a circuit board and a code disk.

8. The plastic planetary gear reducer according to claim 1, characterized in that: The gear box includes a left housing and a right housing which are plugged into each other.

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