TWI492495B - Miniaturized motor having a planetary gears concealed therein - Google Patents

Description

Miniaturized motor with built-in planetary gears

The present invention relates to a miniaturized motor that incorporates a planetary gear, and more particularly to a miniaturized motor that can effectively improve motor accuracy and amplify the torque output, and can reduce the size and weight of the motor.

According to the press, the motor is used in a large number of products as the main power source, especially for the device with high speed or torque demand. The motor operation principle mainly uses the electric energy to generate the electromagnetic field of the stator coated with the coil, and then pushes the magnetic The rotor rotates.

Referring to the third and fourth figures, the conventional common gear motor is mainly provided with a motor main body (7) and a planetary gear box (8), so that the planetary gear box (8) is provided with a sun gear in the center. (81), a ring gear (82) is disposed on the inner wall of the planetary gear box (8), and a plurality of planets are disposed between the sun gear (81) and the ring gear (82) in the planetary gear box (8). a gear (83) for meshing with the sun gear (81) and the ring gear (82), whereby when assembled, the planetary gearbox (8) is mounted on the front end of the motor body (7) and is secured by a lock The planetary gear box (8) is locked with the motor body (7). When the planetary gear box (8) is mounted on the front end of the motor body (7), the rotating shaft of the motor body (7) is also disposed in the planetary gear box ( 8) The sun gear (81) shaft hole is connected to the sun gear (81), the ring gear (82) and the planetary gear (83) in the planetary gear box (8).

Please also refer to the "Integrated Planetary Gear DC Brushless Motor" of China's Announcement No. I253800, which is another conventional geared motor structure, comprising a shell groove device, a rotor portion rotating in the shell groove device, and At least one gear set driven by the rotor portion and operating in the housing groove device, the housing groove device has a stator portion and a ring gear portion having the same cross section, the stator portion has a rear ring shell, and the plurality of rear ring shells extend radially inwardly a stator pole, and a plurality of coils respectively wound around the stator poles, the ring gear portion having a front ring shell and a plurality of protruding teeth protruding inwardly from the front ring shell, the gear set having a sun mounted on the rotor portion a gear, a plurality of planetary gears meshed with the sun gear and the ring gear, and an output member driven by the planetary gear to output a torque.

The above-mentioned two common deceleration motor structures can use the planetary gear set to change the motor speed and torque effect. However, the two deceleration motor structures are all attached to the shaft of the motor body to assemble the sun gear, and then the planetary gear and the ring gear. Engaged with the planetary gear and the ring gear or installed in the planetary gear box, or the ring gear is formed in a housing that is combined with the motor body, and then the planetary gear is received in the housing, so The existing two deceleration motor assembly structures are complicated, and the following defects occur in assembly and use:

1. As the motor assembly structure increases, the precision value of the motor's concentricity and the like will also decrease, so that the existing deceleration motor is liable to cause sloshing and wear between the components when the actuator is actuated, resulting in a loss of the motor and the like.

2. As the products become smaller and lighter, the motors that are the source of power for various products must also be small and lightweight. However, the complicated components of the existing geared motors have a structure that makes the motor volume and weight not effectively reduced. The disadvantages are difficult to apply to the use of modern products that drive small and lightweight.

3. As the number of motor assembly components increases, the manufacturing cost and assembly man-hours are relatively improved. The assembly structure of the complicated planetary gear train of the existing reduction motor has not met the requirements of modern low-cost, high-capacity industries.

4. As the number of components assembled by the motor increases, the probability of damage such as falling off at the assembly of the component is relatively increased. Thus, the maintenance cost of the product is increased, and while the product is being repaired, the production cannot be performed, and the production is superior. Loser.

Therefore, the present inventors have in view of the above-mentioned many shortcomings in the assembly and use of the existing reduction motor, and have been assisted by the manufacturing and design experience and knowledge of the related fields for many years, and have been ingenuity for the existing motor structure. Research and development improvements, and research and development of the present invention.

The present invention relates to a miniaturized motor incorporating a planetary gear, and its main object is to provide a miniaturized motor that can effectively improve motor accuracy, amplify a torque output, and reduce the size and weight of a motor.

In order to achieve the above-mentioned object, the inventors have developed a miniaturized motor having a built-in planetary gear, a motor main body, and a sun gear segment formed on a rotating shaft of the motor main body, and a front end cover at a front end of the motor main body. And forming a circular receiving groove in the front end cover, and providing a through hole in the center of the circular receiving groove for the sun gear segment formed on the rotating shaft to pass through, and the front end cover is located at the sun gear segment of the rotating shaft The side ring is provided with a plurality of planetary gears, so that the inner side of the plurality of planetary gears meshes with the sun gear segment of the rotating shaft, and the plurality of planetary gear sets are provided with an output portion, and the front end cover front end group is provided with a surface cover, and The outer ring teeth of the front cover cover wall or the inner wall of the cover cover are meshed with the outer side of the plurality of planet gears, and a through hole is formed in the center of the cover to expose the output portion.

The miniaturized motor with a planetary gear as described above, wherein the front end cover is further provided with a bearing in the through hole, and the rotating shaft of the motor main body is threaded to the shaft hole of the bearing.

The miniaturized motor with a planetary gear as described above, wherein the front end cover is further provided with an oil seal ring between the motor main body, and a ring hole is arranged in the center of the oil seal ring for the shaft of the motor main body to be disposed. And the oil seal ring is formed along the ring hole and has a tapered extension piece extending toward the rotation axis direction to abut against the rotating shaft, and the oil seal ring is formed with a retaining wall around the periphery of the oil seal ring, and between the retaining wall and the abutting piece A pressure accumulation groove is formed.

The miniaturized motor incorporating the planetary gear as described above, wherein the front end cover and the motor main body are further provided with an oil seal.

Therefore, the miniaturized motor of the built-in planetary gear of the present invention directly forms the sun gear segment on the motor shaft, and directly forms the outer ring tooth on the groove groove wall of the front end cover to reduce the sun gear segment and the outer ring. The tooth is made into a single component, and is assembled to the rotating shaft and the front end cover, and the precision value such as concentricity is lowered due to assembly.

The miniaturized motor of the built-in planetary gear of the invention directly forms the sun gear segment on the motor shaft, and directly forms the outer ring tooth on the groove groove wall of the front end cover, thereby reducing the component assembly design to achieve the motor Small and lightweight benefits.

In addition, the miniaturized motor of the built-in planetary gear of the invention directly forms the sun gear segment on the motor rotating shaft, and further forms the outer ring tooth directly on the groove groove wall of the front end cover, thereby reducing component assembly design to further reduce The cost of manufacturing and the effect of assembly time.

Moreover, the miniaturized motor of the built-in planetary gear of the present invention can effectively reduce the assembled components of the motor planetary gear train, thereby effectively reducing the probability of damage such as falling off at the component assembly, thereby reducing product maintenance costs and incapable of production operations. Loser.

Further, the miniaturized motor of the built-in planetary gear of the present invention is provided with an oil seal ring on the rotating shaft sleeve of the motor main body, whereby the oil seal ring is designed as a pressure accumulating groove formed between the peripheral retaining wall and the abutting plate against the rotating shaft, when the planet When the lubricating oil in the gear train flows into the accumulating groove of the oil seal ring, pressure can be generated on the abutting piece that is abutted on the rotating shaft, so that the abutting piece is closely pressed against the rotating shaft, so as to surely prevent the lubricating oil from penetrating into the motor main body.

The miniaturized motor of the built-in planetary gear of the present invention directly forms the outer ring tooth on the groove groove wall of the front end cover, so that the maximum number of teeth can be made in a limited space, and the sun gear segment formed on the rotating shaft is provided with the minimum number of teeth. According to this, in order to achieve the maximum deceleration ratio, the torque outputted from the output part is maximized.

In order to make the technical means of the present invention and the effects thereof can be more completely and clearly disclosed, the following is a detailed description. Please refer to the disclosed drawings and drawings:

First, referring to the first figure, the miniaturized motor of the built-in planetary gear of the present invention is mainly formed on the rotating shaft (11) of the motor main body (1) to form the sun gear segment (12) and the motor main body ( 1) The front end group is provided with a front end cover (2), and an oil seal (25) is arranged at the joint of the front end cover (2) and the motor main body (1), and a circular cavity is formed in the front end cover (2). And a through hole (22) is arranged in the center of the circular receiving groove (21), and a bearing (23) is arranged in the front end cover (2) in the through hole (22), and the motor body (1) is further The rotating shaft (11) is disposed through the shaft hole (231) of the bearing (23), and the sun gear segment (12) formed on the rotating shaft (11) is inserted into the receiving groove (21) of the front end cover (2), and An oil seal ring (24) is disposed between the center of the front end cover (2) and the motor body (1), and the ring hole (241) of the oil seal ring (24) is provided with a rotating shaft (11), and along the oil seal Ring hole of ring (24) (24 Forming a yoke (242) that is tapered and extended toward the rotating shaft (11) to abut against the rotating shaft (11), and the retaining wall (243) is formed on the periphery of the oil seal ring (24). An accumulator groove (244) is formed between the wall (243) and the abutting piece (242), and the front end cover (2) is provided with a groove (21) on the circumferential side of the sun gear section (12) of the rotating shaft (11). There are a plurality of planetary gears (4) for engaging the inner side of the plurality of planetary gears (4) with the sun gear segment (12) of the rotating shaft (11), and further forming the groove of the receiving groove (21) of the front end cover (2) The ring gear (3) is meshed with the outer side of the plurality of planet gears (4), and the plurality of planet gears (4) are collectively disposed in an output portion (5), and a front cover is disposed at a front end of the front end cover (2) (6), and a through hole (61) is provided in the center of the cover (6) for the output portion (5) to be exposed.

Accordingly, when assembling, please refer to the first and second figures, the front end cover (2) is first assembled to the front end of the motor main body (1), and the rotating shaft (11) of the motor main body (1) is The ring hole (241) of the oil seal ring (24) and the shaft hole (231) of the bearing (23) which are disposed at the center of the front end cover (2) are pierced through the through hole (22) of the front end cover (2). So that the sun gear segment (12) of the rotating shaft (11) is located in the receiving groove (21) of the front end cover (2), and then the plurality of planetary gears (4) are disposed in the front end cover (2) of the receiving groove (21) The preset position is such that the outer side of the number of planetary gears (4) meshes with the outer ring teeth (3) formed by the groove wall of the pocket (21), and the inner side of the planetary gear (4) and the sun shaft (11) are formed. The gear segment (12) is engaged with the front end cover (2) and the front cover (6) of the front end cover to complete the assembly of the motor of the present invention.

When the rotating shaft (11) of the starting motor body (1) is rotated, the sun gear segment (12) formed on the rotating shaft (11) rotates the planetary gear (4) that drives the circumferential side, and the planetary gear (4) is also The outer teeth engage the outer ring teeth (3) to guide the movement, so that the output portion (5) assembled by the plurality of planetary gears (4) transmits power to achieve a predetermined speed and torque output by the planetary gear (4). Since the outer ring tooth (3) is directly formed on the groove wall of the groove (21) of the front end cover (2), the maximum number of teeth can be made in a limited space, and the sun gear formed on the rotating shaft (11) can be made. The segment (12) is provided with the minimum number of teeth, and the maximum deceleration ratio is reached, so that the torque output of the output portion (5) is maximized, and the sun gear segment (12), the planetary gear (4), and the outer ring tooth are increased (3). ) and the smoothness of the action of the bearing (23), etc., in the tank (21) of the front end cover (2), lubricating oil is injected, along with the sun gear section (12), the planetary gear (4), The ring gear (3) is actuated, and the lubricating oil in the tank (21) flows along the rotating shaft (11) toward the motor body (1) with a small pressure, and the oil seal ring (24) is set to the rotating shaft (11). At the time of the lubrication, the lubricating oil will flow into the pressure accumulating groove (244) of the oil seal ring (24). At this time, the lubricating oil in the pressure accumulating groove (244) will abut against the rotating shaft (11). (242) The pressure is generated, and the abutting piece (242) of the oil seal ring (24) is more closely pressed against the rotating shaft (11) to prevent the lubricating oil from penetrating into the motor body (1).

Therefore, from the above structure and assembly description, the motor of the present invention directly molds the sun gear segment (12) on the rotating shaft (11), and the outer ring gear (3) is directly formed on the front end cover (2). The groove wall, thereby avoiding the conventional assembly of the sun gear segment (12) and the outer ring gear (3) into a single component, respectively, assembled to the rotating shaft (11) and the front end cover (2), due to component assembly The tolerances cause the accuracy of the motor concentricity to decrease, and the sloshing wear is likely to occur when the motor is actuated. At the same time, the sun gear segment (12) is directly formed on the rotating shaft (11), and the outer ring gear (3) is used. Directly molded into the groove of the front cover (2) groove (21) to further reduce the motor components of the present invention, in order to reduce the size and weight of the motor of the present invention, so that the motor of the present invention can be applied to a small motor The use of the product, in addition, with the reduction of the components of the motor of the present invention, the manufacturing cost and assembly man-hour can be further reduced to meet the current low cost and high capacity production. requester.

The foregoing embodiment or the drawings do not limit the structure of the miniaturized motor of the built-in planetary gear of the present invention. The outer ring teeth (3) of the present invention may also be integrally formed on the inner wall of the cover (6), etc. Engagement with the outer sides of the number of planet gears (4), and variations or modifications as appropriate by those of ordinary skill in the art, should be considered as not departing from the scope of the invention.

As can be seen from the above structures and embodiments, the present invention has the following advantages:

1. The miniaturized motor of the built-in planetary gear of the present invention directly molds the sun gear segment on the motor shaft, and directly forms the outer ring tooth on the groove groove wall of the front end cover, thereby reducing the sun gear segment and The outer ring tooth is made into a single component, and is assembled to the rotating shaft and the front end cover, and the accuracy value such as concentricity is lowered due to assembly.

2. The miniaturized motor of the built-in planetary gear of the invention directly forms the sun gear segment on the motor shaft, and directly forms the outer ring tooth on the groove groove wall of the front end cover, thereby reducing the component assembly design to reach the motor. The benefits of small and lightweight.

3. The miniaturized motor of the built-in planetary gear of the present invention directly forms the sun gear segment on the motor shaft, and directly forms the outer ring tooth on the groove groove wall of the front end cover, thereby reducing component assembly design to further achieve Reduce the cost of manufacturing and the effect of assembly time.

4. The miniaturized motor of the built-in planetary gear of the present invention can effectively reduce the assembly components of the motor planetary gear train, thereby effectively reducing the probability of damage such as falling off at the component assembly, thereby reducing the maintenance cost of the product and the inability to produce the product. The loser.

5. The miniaturized motor of the built-in planetary gear of the present invention is provided with an oil seal ring on the rotating sleeve of the motor main body, whereby the oil seal ring is designed in the accumulating groove formed between the peripheral retaining wall and the abutting plate against the rotating shaft. When the lubricating oil in the planetary gear train flows into the accumulating groove of the oil seal ring, pressure can be generated on the abutting piece that is abutted on the rotating shaft, so that the abutting piece is closely pressed against the rotating shaft, so as to surely prevent the lubricating oil from penetrating into the motor main body.

6. The miniaturized motor of the built-in planetary gear of the present invention directly forms the outer ring tooth on the groove groove wall of the front end cover, so that the maximum number of teeth can be made in a limited space, and the sun gear segment formed on the rotating shaft is minimized. The number of teeth, according to this, to achieve the maximum deceleration ratio, so that the output of the output torque can be maximized.

In summary, the embodiments of the present invention can achieve the expected functions, and the specific structures disclosed therein have not been seen in similar products, nor have they been disclosed before the application, and have fully complied with the requirements and requirements of the Patent Law. If you apply for an invention patent in accordance with the law, you are welcome to review it and grant a patent.

<this invention>

(1). . . Motor body

(11). . . Rotating shaft

(12). . . Sun gear segment

(2). . . Front end cover

(twenty one). . . Crate

(twenty two). . . Through hole

(twenty three). . . Bearing

(231). . . Shaft hole

(twenty four). . . Oil seal ring

(241). . . Ring hole

(242). . . Torch

(243). . . Barrier

(244). . . Pressure storage tank

(25). . . Oil seal

(3). . . Outer ring tooth

(4). . . Planetary gear

(5). . . Output department

(6). . . Cover

<existing>

(7). . . Motor body

(8). . . Planetary gearbox

(81). . . Sun gear

(82). . . Ring gear

(83). . . Planetary gear

First Figure: Front section view of the present invention

Second Figure: Side section view of the present invention

The third picture: the existing three-dimensional exploded view

Figure 4: Existing front section view

(1). . . Motor body

(11). . . Rotating shaft

(12). . . Sun gear segment

(2). . . Front end cover

(twenty one). . . Crate

(twenty two). . . Through hole

(twenty three). . . Bearing

(231). . . Shaft hole

(twenty four). . . Oil seal ring

(241). . . Ring hole

(242). . . Torch

(243). . . Barrier

(244). . . Pressure storage tank

(25). . . Oil seal

(3). . . Outer ring tooth

(4). . . Planetary gear

(5). . . Output department

(6). . . Cover

Claims (8)

The utility model relates to a miniaturized motor with a built-in planetary gear, which is provided with a motor main body, and a sun gear segment is formed on a rotating shaft of the motor main body, and a front end cover is arranged at a front end of the motor main body, and a circular receiving groove is formed on the front end cover. And a through hole is formed in the center of the circular cavity for the sun gear segment formed on the rotating shaft to pass through, and the front cover is provided with a plurality of planetary gears on the circumferential side of the sun gear segment of the rotating shaft to make the number of planets The inner side of the gear meshes with the sun gear segment of the rotating shaft, and the outer ring tooth is formed on the groove of the front end cover to engage the outer side of the plurality of planetary gears, and the plurality of planetary gear sets are provided with an output portion. The front end cover front end group is provided with a surface cover, and a through hole is formed in the center of the front cover for the output portion to be exposed. The utility model relates to a miniaturized motor with a built-in planetary gear, which is provided with a motor main body, and a sun gear segment is formed on a rotating shaft of the motor main body, and a front end cover is arranged at a front end of the motor main body, and a circular receiving groove is formed on the front end cover. And a through hole is formed in the center of the circular cavity for the sun gear segment formed on the rotating shaft to pass through, and the front cover is provided with a plurality of planetary gears on the circumferential side of the sun gear segment of the rotating shaft to make the number of planets The inner side of the gear meshes with the sun gear segment of the rotating shaft, and the front cover of the front end cover is provided with a face cover, and the inner wall of the cover is formed with an outer ring tooth to mesh with the outer side of the plurality of planet gears, and the number of planets is further The gear set is provided with an output portion, and a through hole is formed in the center of the cover for the output portion to be exposed. The miniaturized motor of the built-in planetary gear according to claim 1 or 2, wherein the front end cover is further provided with a bearing in the through hole, and the rotating shaft of the motor main body is threaded to the shaft hole of the bearing . The miniaturized motor of the built-in planetary gear according to the third aspect of the invention, wherein the front end cover is further provided with an oil seal ring between the motor main body and a ring hole for the motor in the center of the oil seal ring. The shaft of the main body is pierced and assembled, and the oil seal ring is formed along the ring hole and has a tapered extension piece extending toward the rotating shaft to abut against the rotating shaft, and the outer periphery of the oil sealing ring is formed with a retaining wall, and An accumulator groove is formed between the retaining wall and the abutment piece. The miniaturized motor of the built-in planetary gear according to the fourth aspect of the invention, wherein the front end cover and the motor main body are further provided with an oil seal. The miniaturized motor of the built-in planetary gear according to the first or second aspect of the invention, wherein the front end cover is further provided with an oil seal ring between the motor main body and a ring hole at the center of the oil seal ring, The shaft of the motor body is connected to the shaft, and the oil seal ring is formed along the ring hole and has a tapered extension piece extending toward the rotating shaft to abut against the rotating shaft, and the periphery of the oil sealing ring is formed with a retaining wall. And a pressure accumulating groove is formed between the retaining wall and the abutting piece. The miniaturized motor of the built-in planetary gear according to the sixth aspect of the invention, wherein the front end cover and the motor main body are further provided with an oil seal. The miniaturized motor incorporating a planetary gear according to claim 1 or 2, wherein the front end cover and the motor main body are further provided with an oil seal.