A type of drum motor

Abstract

This utility model discloses a drum motor that provides power through a drive component. Since the mover of the drive component is connected to the input end of the first planetary gear, the power is first transmitted to the first planetary gear, and then from the first planetary gear to the second planetary gear. The second planetary gear drives the output shaft to rotate relative to the housing. The bearing assembly supports the rotation of the output shaft, and the output shaft drives the external device connected to it to rotate. The first and second planetary gears consist of multiple gears meshing simultaneously, which can achieve a large torque in a compact structure. Furthermore, the force transmission between the first and second planetary gears is continuous and smooth, thereby significantly reducing vibration and operating noise.

Description

Technical Field

[0001] This utility model relates to the field of gearboxes, specifically to a roller motor. Background Technology

[0002] Most roller motors on the market today are fixed-axis gear reducers. To achieve high output torque, multi-stage transmission is required, resulting in a long axial length, a less compact structure, and an increased motor size. Furthermore, fixed-axis gear reducers experience less smooth meshing impact and vibration, leading to greater vibration and relatively higher noise levels during operation. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a roller motor that can solve the problems of the existing roller motor transmission structure being not compact enough and having high noise during operation.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a roller motor is provided, including a drive component, a housing, a first planetary gear, a second planetary gear, and an output shaft. The stator of the drive component is mounted on the housing, the mover of the drive component is connected to the input end of the first planetary gear, the output end of the first planetary gear is connected to the input end of the second planetary gear, the output end of the second planetary gear is connected to the output shaft, and the output shaft is rotatably connected to the housing through a bearing assembly, with one end of the output shaft extending out of the housing.

[0005] As a further improvement to the above technical solution, the driving component includes a brushless motor and motor gears. The stator of the brushless motor is mounted on the housing, the mover of the brushless motor is connected to the motor gears, and the motor gears are connected to the input end of the first planetary gear.

[0006] As a further improvement to the above technical solution, the first planetary gear includes a first planetary carrier and three first planetary gears. Three needle roller bearings are provided on the first planetary carrier, and the three first planetary gears are respectively mounted on the three needle roller bearings. The three first planetary gears surround the motor gears, and the motor gears mesh with the three first planetary gears.

[0007] As a further improvement to the above technical solution, the second planetary gear includes a second planetary carrier and four second planetary gears. The second planetary carrier is provided with four needle roller bearings, and the four second planetary gears are respectively mounted on the four needle roller bearings. The second planetary carrier is provided with a sun gear, which is connected to the output end of the first planetary gear. The second planetary carrier is connected to the output shaft, and the four second planetary gears surround the sun gear, and the sun gear meshes with all four second planetary gears.

[0008] As a further improvement to the above technical solution, the housing includes an end cover and an internal gear housing. One end of the internal gear housing is connected to the drive component, and the other end is connected to the end cover. The first planetary gear and the second planetary gear are both located inside the internal gear housing, and one end of the output shaft extends out of the end cover.

[0009] As a further improvement to the above technical solution, the bearing assembly includes a first rolling bearing and a second rolling bearing, the output shaft is connected to both the first rolling bearing and the second rolling bearing, and the first rolling bearing and the second rolling bearing are respectively located at both ends of the end cover.

[0010] As a further improvement to the above technical solution, the first rolling bearing is located at the end of the end cover away from the inner tooth housing, and a retaining ring is provided on the output shaft, the retaining ring being located on the side of the first rolling bearing away from the inner tooth housing.

[0011] As a further improvement to the above technical solution, an oil seal is provided at the end of the end cover away from the inner tooth housing, and the oil seal is sealed between the end cover and the output shaft.

[0012] As a further improvement to the above technical solution, the end cap and the inner toothed outer shell are fixedly connected by a number of screws and a number of pins, and the number of screws and pins are arranged in a cross pattern.

[0013] As a further improvement to the above technical solution, a flat key is provided at one end of the output shaft extending from the housing, and the length direction of the flat key is parallel to the axial direction of the output shaft.

[0014] The beneficial effects of this invention are as follows: Power is provided by the driving component. Since the moving part of the driving component is connected to the input end of the first planetary gear, the power is first transmitted to the first planetary gear, and then from the first planetary gear to the second planetary gear. The second planetary gear drives the output shaft to rotate relative to the housing. The bearing assembly supports the rotation of the output shaft, and the output shaft drives the external device connected to it to rotate. The first and second planetary gears consist of multiple gears meshing simultaneously, which can achieve a large torque in a compact structure. Furthermore, the force transmission between the first and second planetary gears is continuous and smooth, thereby significantly reducing vibration and operating noise. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the drum motor provided in a preferred embodiment of the present invention;

[0017] Figure 2 This is an exploded view of the drum motor provided in a preferred embodiment of the present invention;

[0018] Figure 3 This is another exploded view of the drum motor provided in a preferred embodiment of the present invention.

[0019] Reference numerals: 1. Drive component; 2. Housing; 3. First planetary gear; 4. Second planetary gear; 5. Output shaft; 6. Bearing assembly.

[0020] 11. Brushless motor; 12. Motor gear; 21. End cap; 22. Inner gear housing; 23. Screw; 24. Pin; 31. First planetary carrier; 32. First planetary gear; 41. Second planetary carrier; 42. Second planetary gear; 51. Snap ring; 52. Flat key; 61. First rolling bearing; 62. Second rolling bearing.

[0021] 211, oil seal; 311, needle roller bearing; 411, sun gear. Detailed Implementation

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0023] Please see Figure 1-3A preferred embodiment of this utility model provides a roller motor, including a drive component 1, a housing 2, a first planetary gear 3, a second planetary gear 4, and an output shaft 5. The stator of the drive component 1 is mounted on the housing 2, the mover of the drive component 1 is connected to the input end of the first planetary gear 3, the output end of the first planetary gear 3 is connected to the input end of the second planetary gear 4, and the output end of the second planetary gear 4 is connected to the output shaft 5. The output shaft 5 is rotatably connected to the housing 2 via a bearing assembly 6, and one end of the output shaft 5 extends out of the housing 2. Power is provided by the drive component 1. Since the mover of the drive component 1 is connected to the input end of the first planetary gear 3, the power is first transmitted to the first planetary gear 3, and then from the first planetary gear 3 to the second planetary gear 4. The second planetary gear 4 drives the output shaft 5 to rotate relative to the housing 2. The bearing assembly 6 supports the rotation of the output shaft 5, and the output shaft 5 drives the external device connected to it to rotate. The first planetary gear 3 and the second planetary gear 4 consist of multiple gears meshing simultaneously, which enables a large torque to be achieved in a compact structure. Furthermore, the force transmission in the first planetary gear 3 and the second planetary gear 4 is continuous and smooth, thereby significantly reducing vibration and operating noise.

[0024] Specifically, the drive component 1 includes a brushless motor 11 and motor gears 12. The stator of the brushless motor 11 is mounted on the housing 2, and the mover of the brushless motor 11 is connected to the motor gears 12. The motor gears 12 are connected to the input end of the first planetary gear 3. Power is provided through the cooperation between the brushless motor 11 and the motor gears 12. The hollow cup rotor of the brushless motor 11 has no iron core and slots, eliminating vibration and noise caused by uneven magnetic resistance, resulting in smoother operation and further achieving the purpose of quiet operation. The motor gears 12 are made of stainless steel, which ensures strength while effectively reducing the rotational speed.

[0025] The first planetary gear 3 includes a first planetary carrier 31 and three first planetary gears 32. The first planetary carrier 31 is provided with three needle roller bearings 311, and the three first planetary gears 32 are respectively mounted on the three needle roller bearings 311. The needle roller bearings 311 can effectively prevent the grease from carbonizing and sticking to the optical shaft due to the high temperature generated during operation, increase the self-lubricating effect, and thus extend the service life. The three first planetary gears 32 surround the motor gear 12, and the motor gear 12 meshes with the three first planetary gears 32. The power is transmitted to the three first planetary gears 32 through the motor gear 12, and the three first planetary gears 32 synchronously drive the first planetary carrier 31 to rotate, thereby outputting a large torque.

[0026] The second planetary gear 4 includes a second planetary carrier 41 and four second planetary gears 42. Four needle roller bearings 311 are mounted on the second planetary carrier 41, and the four second planetary gears 42 are respectively mounted on the four needle roller bearings 311. A sun gear 411 is mounted on the second planetary carrier 41 and is connected to the output end of the first planetary gear 3. Specifically, the sun gear 411 is connected to the first planetary carrier 31, and the second planetary carrier 41 is connected to the output shaft 5. The four second planetary gears 42 surround the sun gear 411, and all four second planetary gears 42 are meshed with the sun gear 411. The first planetary carrier 31 drives the sun gear 411 to rotate, which in turn drives the four second planetary gears 42 to rotate, and the second planetary carrier 41 drives the output shaft 5 to rotate. The structure is compact and has a large transmission torque.

[0027] In this embodiment, the outer casing 2 includes an end cap 21 and an internal gear outer casing 22. One end of the internal gear outer casing 22 is connected to the drive component 1. Specifically, one end of the internal gear outer casing 22 is connected to the stator of the brushless motor 11, and the other end is connected to the end cap 21. The first planetary gear 3 and the second planetary gear 4 are both located inside the internal gear outer casing 22, and one end of the output shaft 5 extends out of the end cap 21. The internal gear outer casing 22 and the end cap 21 are designed as two separate parts, which is easier to process than the conventional one-piece design and helps to reduce costs.

[0028] The bearing assembly 6 includes a first rolling bearing 61 and a second rolling bearing 62. The output shaft 5 is connected to both the first rolling bearing 61 and the second rolling bearing 62, and the first rolling bearing 61 and the second rolling bearing 62 are located at opposite ends of the end cover 21. The coordinated arrangement of the first rolling bearing 61 and the second rolling bearing 62 ensures torque transmission over long distances, guarantees the concentricity of the output shaft 5 and the end cover 21, ensures smooth torque transmission of the output shaft 5 at high speeds, and prevents misalignment that could damage parts or increase noise.

[0029] The first rolling bearing 61 is located at the end of the end cover 21 away from the inner gear housing 22. A retaining ring 51 is provided on the output shaft 5, located on the side of the first rolling bearing 61 away from the inner gear housing 22. The retaining ring 51 can provide axial restraint for the first rolling bearing 61 to prevent it from moving around, and the retaining ring 51 can be installed and removed quickly, facilitating maintenance and replacement.

[0030] An oil seal 211 is provided at the end of the end cover 21 away from the inner gear housing 22. The oil seal 211 is sealed between the end cover 21 and the output shaft 5. The oil seal 211 can not only prevent dust from entering the end cover 21, but also prevent abnormal noise, prevent oil leakage, and avoid life reduction due to friction.

[0031] The end cap 21 and the inner toothed outer shell 22 are fixedly connected by a number of screws 23 and a number of pins 24, which are arranged in a crisscross pattern. The use of screws 23 and pins 24 for double fixing increases the firmness of the connection between the end cap 21 and the inner toothed outer shell 22, preventing the product from failing due to loosening or falling off. The pins 24 can also correct for concentricity deviations.

[0032] To enhance the secure connection between the output shaft 5 and the external device, a key 52 is provided at the end of the output shaft 5 extending from the housing 2. The length direction of the key 52 is parallel to the axial direction of the output shaft 5. The key 52 prevents relative rotation between the external device and the output shaft 5, ensuring that the output shaft 5 and the external device always rotate synchronously without any phase difference.

[0033] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A drum motor, characterized in that: The device includes a drive unit, a housing, a first planetary gear, a second planetary gear, and an output shaft. The stator of the drive unit is mounted on the housing, the mover of the drive unit is connected to the input end of the first planetary gear, the output end of the first planetary gear is connected to the input end of the second planetary gear, the output end of the second planetary gear is connected to the output shaft, and the output shaft is rotatably connected to the housing via a bearing assembly, with one end of the output shaft extending out of the housing.

2. The drum motor according to claim 1, characterized in that: The drive unit includes a brushless motor and motor gears. The stator of the brushless motor is mounted on the housing, the mover of the brushless motor is connected to the motor gears, and the motor gears are connected to the input end of the first planetary gear.

3. The drum motor according to claim 2, characterized in that: The first planetary gear includes a first planet carrier and three first planetary gears. Three needle roller bearings are provided on the first planet carrier, and the three first planetary gears are respectively mounted on the three needle roller bearings. The three first planetary gears surround the motor gears, and the motor gears mesh with the three first planetary gears.

4. The drum motor according to claim 1, characterized in that: The second planetary gear includes a second planetary carrier and four second planetary gears. The second planetary carrier is provided with four needle roller bearings, and the four second planetary gears are respectively mounted on the four needle roller bearings. The second planetary carrier is provided with a sun gear, which is connected to the output end of the first planetary gear. The second planetary carrier is connected to the output shaft. The four second planetary gears surround the sun gear, and the sun gear meshes with all four second planetary gears.

5. The drum motor according to claim 1, characterized in that: The housing includes an end cover and an internal gear housing. One end of the internal gear housing is connected to the drive component, and the other end is connected to the end cover. The first planetary gear and the second planetary gear are both located inside the internal gear housing, and one end of the output shaft extends out of the end cover.

6. The drum motor according to claim 5, characterized in that: The bearing assembly includes a first rolling bearing and a second rolling bearing. The output shaft is connected to both the first rolling bearing and the second rolling bearing, and the first rolling bearing and the second rolling bearing are located at opposite ends of the end cover.

7. The drum motor according to claim 6, characterized in that: The first rolling bearing is located at the end of the end cap away from the inner gear housing, and a retaining ring is provided on the output shaft, the retaining ring being located on the side of the first rolling bearing away from the inner gear housing.

8. The drum motor according to claim 5, characterized in that: An oil seal is provided at the end of the end cap away from the inner tooth housing, and the oil seal is sealingly connected between the end cap and the output shaft.

9. The drum motor according to claim 5, characterized in that: The end cap and the inner toothed outer shell are fixedly connected by a number of screws and a number of pins, and the screws and pins are arranged in a cross pattern.

10. The drum motor according to any one of claims 1-9, characterized in that: A flat key is provided at one end of the output shaft that extends out of the housing, and the length direction of the flat key is parallel to the axial direction of the output shaft.

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