Servo motor

Abstract

The utility model relates to the technical field of servo motors for teaching and training, in particular to a servo motor. Comprising a motor core, one end of the motor core is provided with a power output shaft and a planetary gear mechanism fixedly connected to the shaft side of the power output shaft, the planetary gear mechanism comprises an output shaft disc arranged at the end of the power output shaft and an output shaft mechanism connected with the output shaft disc, and the output shaft mechanism comprises a bevel gear connected to the output shaft disc. The planetary gear mechanism can reduce the output rotating speed of the motor core and improve the output torque, and the output shaft mechanism can change the power output direction. The problem that large noise is generated during operation due to the fact that the size of a servo motor in the field of teaching and training of department and wound is large is solved.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology for educational training, and in particular to a servo motor. Background Technology

[0002] Servo motors are used in science and technology education and training, playing a crucial role in many products, especially remote-controlled models, robots, toy cars, and drones. However, commercially available servo motors have some shortcomings. Firstly, their large size or heavy weight makes them unsuitable for space-constrained designs. Secondly, some servo motors generate significant noise during operation, affecting user experience and overall product performance. Thirdly, the output power of existing servo motors is directed in the same direction as the motor's rotation, which cannot meet the personalized needs of specific scenarios and can cause fatigue when held by hand.

[0003] Therefore, there is a need for a handheld servo motor of appropriate size that can rotate with low noise to meet the application requirements in the field of science and technology innovation education and training. Utility Model Content

[0004] To address the issue of servo motors in the field of science and technology innovation and education generating significant noise due to their large size, this utility model provides a servo motor.

[0005] This utility model provides a servo motor, including a motor core, one end of which is provided with a power output shaft, and a planetary gear mechanism fixedly connected to the side of the power output shaft. The planetary gear mechanism includes an output shaft disk disposed at the end of the power output shaft, and an output shaft mechanism connected to the output shaft disk. The output shaft mechanism includes a helical gear connected to the output shaft disk and a side-out bevel gear meshing with the helical gear. The planetary gear mechanism can reduce the output speed of the motor core and increase the output torque, and the output shaft mechanism can change the power output direction.

[0006] Furthermore, the planetary gear mechanism includes a cylindrical reduction gearbox with a rack formed on its inner wall. A first-stage planetary gear and a second-stage planetary gear mesh inside the reduction gearbox. A planetary gear carrier is provided between the first-stage and second-stage planetary gears. A first-stage sun gear is fixedly connected to the power output shaft. A second-stage sun gear is fixedly connected to one side of the planetary gear carrier, and a first connecting post is fixedly connected to the other side. The first-stage planetary gear meshes with the first-stage sun gear and is connected to the planetary gear carrier through the first connecting post. A second connecting post is provided on the output shaft disk. The second-stage planetary gear meshes with the second-stage sun gear and is connected to the output shaft disk through the second connecting post.

[0007] Furthermore, the output shaft disk has protruding teeth on the side facing the helical gear, and the helical gear has recessed teeth on the side facing the output shaft disk, with the protruding teeth and recessed teeth engaging and connecting.

[0008] Furthermore, the gearbox and the side-exit bevel gear are connected by a fixing frame, which supports the side-exit bevel gear on the gearbox and keeps the side-exit bevel gear meshing with the helical gear.

[0009] Furthermore, the side-exit bevel gear is fixedly connected to a cylindrical pin connector, the end face of which has a cross-shaped shaft hole, and a plurality of circular shaft holes are formed around the cross-shaped shaft hole.

[0010] Furthermore, a cross groove is formed on the end face of the side-exit bevel gear away from the pin connector.

[0011] Furthermore, the motor mechanism includes a motor, an optical encoder disk disposed on the motor end face opposite to the power output shaft, a drive circuit board and a reset circuit board disposed opposite each other on the side of the motor, the drive circuit board and the reset circuit board being electrically connected, the drive circuit board being provided with a photoelectric pair, the photoelectric pair measuring the motor speed through the optical encoder disk.

[0012] Furthermore, the reset circuit board is provided with a pin header that extends outward along the axial direction of the motor.

[0013] Furthermore, the reset circuit board is equipped with indicator lights and operation buttons.

[0014] Furthermore, the motor core is housed in the lower housing of the fixed motor core. The surface of the lower housing is provided with a light guide hole for the indicator light to pass through and an integrated injection-molded button. The planetary gear mechanism and the output shaft mechanism are housed in the upper housing. The upper housing has a plug-in plate, and the lower housing has a plug-in slot corresponding to the plug-in plate.

[0015] Furthermore, the upper housing and the lower housing are fixedly connected by screws.

[0016] In summary, this utility model has the following beneficial technical effects:

[0017] 1. The servo motor proposed in this utility model has a compact structure by rationally designing the planetary gear mechanism and the layout of each component. Compared with commercially available servo motors that are large or heavy, it is small in size and light in weight.

[0018] 2. The servo motor proposed in this utility model can operate with low noise. The planetary gear mechanism adopts multi-stage gear meshing transmission, which can more smoothly reduce the output speed of the motor core and increase the output torque compared with the traditional transmission method, and reduce noise caused by poor gear meshing, sudden speed changes and other factors.

[0019] 3. The servo motor proposed in this utility model has a helical gear in the output shaft mechanism that meshes with a side-output bevel gear, which can change the power output direction. The side-output bevel gear and the pin connector can be inserted into pins of different sizes to provide output power to the pins, which can meet the personalized needs of power output direction in specific scenarios and can more flexibly adapt to the power transmission requirements of different mechanical structures.

[0020] 4. The servo motor proposed in this utility model is easy to operate by hand. The motor core is reasonably set up, including a photoelectric encoder disk set on the side opposite to the power output shaft, and a drive circuit board and a reset circuit board set on the side opposite to each other, so that the overall center of gravity is evenly distributed and fatigue is not easily caused by the center of gravity imbalance when holding the hand.

[0021] 5. The servo motor proposed in this utility model has an upper housing and a lower housing that respectively accommodate different components. These components are connected by a plug-in plate and a plug-in slot to form a coherent whole. Finally, the components are fixed together with screws, which facilitates assembly during the manufacturing process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a servo motor according to an embodiment of the present invention.

[0023] Figure 2 This is an exploded structural diagram of a servo motor according to an embodiment of the present invention.

[0024] Figure 3 This is an exploded structural diagram of the planetary gear mechanism according to an embodiment of the present invention.

[0025] Figure 4 This is an exploded structural diagram of another planetary gear mechanism according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the pin connector according to an embodiment of the present utility model.

[0027] Figure 6 This is a schematic diagram of the side-exit bevel gear according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the motor core structure according to an embodiment of the present utility model.

[0029] Figure 8 This is a schematic diagram of another planetary gear mechanism according to an embodiment of the present invention.

[0030] Among them, 1. Motor mechanism; 101. Power output shaft; 102. Motor; 103. Photoelectric encoder; 104. Drive circuit board; 105. Photoelectric pair; 106. Reset circuit board; 107. Pin header; 108. Indicator light; 109. Operation button; 2. Planetary gear mechanism; 201. Gearbox; 202. Rack; 203. Output shaft disk; 204. Second connecting column; 205. Protruding tooth; 206. Second-stage planetary gear; 207. Second-stage sun gear; 2 08. Planetary gear carrier; 209. First connecting column; 210. First-stage planetary gear; 211. First-stage sun gear; 3. Output shaft mechanism; 301. Helical gear; 302. Recessed tooth; 303. Side-exit bevel gear; 304. Cross groove; 4. Fixing bracket; 5. Pin connector; 501. Cross shaft hole; 502. Circular shaft hole; 6. Lower housing; 601. Light guide hole; 602. Integrated injection molded button; 603. Insertion slot; 7. Upper housing; 701. Insertion plate. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Reference Figure 1 and Figure 2 A servo motor in this embodiment, Figure 1 The demonstration showcases two servo motors, including a motor core 1. One end of the motor core 1 has a power output shaft 101, and a planetary gear mechanism 2 is fixedly connected to the side of the power output shaft 101. The planetary gear mechanism 2 includes an output shaft disk 203 located at the end of the power output shaft 101, and an output shaft mechanism 3 connected to the output shaft disk 203. The output shaft mechanism 3 includes a helical gear 301 connected to the output shaft disk 203 and a side-output bevel gear 303 meshing with the helical gear 301. The planetary gear mechanism 2 can reduce the output speed of the motor core 1 and increase the output torque, while the output shaft mechanism 3 can change the direction of power output.

[0034] Reference Figure 3 and Figure 4The planetary gear mechanism 2 includes a cylindrical reduction gearbox 201. A rack 202 is formed on the inner wall of the reduction gearbox 201. A first-stage planetary gear 210 and a second-stage planetary gear 206 mesh inside the reduction gearbox 201. A planetary gear carrier 208 is provided between the first-stage planetary gear 210 and the second-stage planetary gear 206. A first-stage sun gear 211 is fixedly connected to the power output shaft 101. A second-stage sun gear 207 is fixedly connected to one side of the planetary gear carrier 208, and a first connecting post 209 is fixedly connected to the other side. The first-stage planetary gear 210 and the first-stage sun gear 211 mesh and are connected to the planetary gear carrier 208 through the first connecting post 209. A second connecting post 204 is provided on the output shaft disk 203. The second-stage planetary gear 206 and the second-stage sun gear 207 mesh and are connected to the output shaft disk 203 through the second connecting post 204.

[0035] The power output shaft 101 transmits power to the first-stage planetary gear 210 via the first-stage sun gear 211. The planetary gear then transmits power to the second-stage sun gear 207 via the planet carrier. The second-stage sun gear 207 transmits power to the second-stage planetary gear 206, which in turn transmits power to the output shaft disk 203. The output shaft disk 203 then transmits power to the helical gear 301. By setting up a two-stage planetary gear mechanism 2, multi-stage reduction is achieved, greatly increasing torque and reducing transmission speed. Through the tight fit of the structure, smooth power transmission can be achieved during operation, thus reducing noise and vibration.

[0036] Reference Figure 3 and Figure 4 The output shaft disk 203 has protruding teeth 205 on the side facing the helical gear 301, and the helical gear 301 has recessed teeth 302 on the side facing the output shaft disk 203. The protruding teeth 205 and the recessed teeth 302 are engaged and connected. This avoids the use of additional connecting parts, improving the structural compactness and ease of assembly.

[0037] Reference Figure 2 The gearbox 201 and the side-exit bevel gear 303 are connected by a fixing frame 4. The fixing frame 4 supports the side-exit bevel gear 303 on the gearbox 201 and keeps the side-exit bevel gear 303 meshing with the helical gear 301. The fixing frame 4 provides support for the side-exit bevel gear 303.

[0038] Reference Figure 5 The side-exit bevel gear 303 is fixedly connected to a cylindrical pin connector 5. The end face of the pin connector 5 has a cross shaft hole 501, and a plurality of circular shaft holes 502 are formed around the cross shaft hole 501.

[0039] Reference Figure 6The end face of the side-exit bevel gear 303 away from the pin connector 5 has a cross groove 304.

[0040] The cross groove 304 can be used to insert external pins. Similarly, the cross shaft hole 501 and the circular shaft hole 502 can also be used to insert external pins. By designing different sizes, external pins of various sizes can be inserted.

[0041] Reference Figure 7 The motor mechanism 1 includes a motor 102, an optical encoder 103 disposed on the end face of the motor 102 opposite to the power output shaft 101, a drive circuit board 104 and a reset circuit board 106 disposed opposite to each other on the side of the motor 102, the drive circuit board 104 and the reset circuit board 106 being electrically connected, the drive circuit board 104 being provided with a photoelectric pair 105, the photoelectric pair 105 measuring the rotational speed of the motor 102 through the optical encoder 103.

[0042] The general principle for measuring rotational speed is that the photoelectric pair 105 is a photoelectric device composed of a light-emitting diode (LED) and a phototransistor. When the motor 102 operates, the photoelectric encoder 103, mounted on the end face of the motor 102 opposite to the power output shaft 101, rotates synchronously. The photoelectric encoder 103 has many evenly distributed transparent and opaque stripes. As the encoder 103 rotates, light emitted from the LED shines through the gaps in the stripes onto the phototransistor. When light shines, the phototransistor conducts, generating an electrical signal; when the light is blocked by the opaque stripes, the phototransistor is cut off, and the electrical signal disappears. The rotational speed and angle of the motor 102 are measured by calculating the signal.

[0043] Reference Figure 7 The reset circuit board 106 is provided with a pin header 107, which extends outward along the axial direction of the motor 102.

[0044] Reference Figure 7 The reset circuit board 106 is equipped with an indicator light 108 and an operation button 109.

[0045] Reference Figure 2 The motor core 1 is housed in the lower housing 6 that fixes the motor core 1. The surface of the lower housing 6 is provided with a light guide hole 601 for the indicator light 108 to pass through and an integrated injection molded button 602. The planetary gear mechanism 2 and the output shaft mechanism 3 are housed in the upper housing 7. The upper housing 7 forms a plug plate 701, and the lower housing 6 forms a plug groove 603 corresponding to the plug plate 701.

[0046] The upper housing 7 and the lower housing 6 are fixedly connected by screws.

[0047] The upper housing 7 and the lower housing 6 form a coherent and stable overall structure. The upper housing 7 is divided into a first upper housing 7 and a second upper housing 7, which are fixed together by screws to form the upper housing 7. In this embodiment, the servo motor has an overall rectangular structure with a balanced internal center of gravity, making it easy to hold.

[0048] Example 2

[0049] Reference Figure 8 The difference between this embodiment and Embodiment 1 is that this embodiment provides another planetary gear mechanism.

[0050] The planetary gear mechanism 2 includes a cylindrical reduction gearbox 201, with a rack 202 formed on the inner wall of the reduction gearbox 201. A first-stage planetary gear 210 is meshed inside the reduction gearbox 201. A first-stage sun gear 211 is fixedly connected to the power output shaft 101. The first-stage planetary gear 210 meshes with the first-stage sun gear 211. The output shaft disk 203 is provided with a second connecting post 204. The first-stage planetary gear 210 meshes with the first-stage sun gear 211 and is connected to the output shaft disk 203 through the second connecting post 204.

[0051] The power output shaft 101 transmits power to the first-stage planetary gear 210 via the first-stage sun gear 211. The first-stage planetary gear 210 then transmits the power to the output shaft disk 203, which in turn transmits the power to the helical gear 301. By setting up a first-stage planetary gear mechanism, speed reduction is achieved, greatly increasing torque and reducing transmission speed. Through the tight fit of the structure, smooth power transmission can be achieved during operation, thus reducing noise and vibration.

[0052] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A servo motor, characterized in that, The device includes a motor core (1), one end of which is provided with a power output shaft (101), and a planetary gear mechanism (2) fixedly connected to the side of the power output shaft (101). The planetary gear mechanism (2) includes an output shaft disk (203) provided at the end of the power output shaft (101), and an output shaft mechanism (3) connected to the output shaft disk (203). The output shaft mechanism (3) includes a helical gear (301) connected to the output shaft disk (203) and a side-out bevel gear (303) meshing with the helical gear (301). The planetary gear mechanism (2) can reduce the output speed of the motor core (1) and increase the output torque, and the output shaft mechanism (3) can change the power output direction.

2. The servo motor according to claim 1, characterized in that, The planetary gear mechanism (2) includes a cylindrical reduction gearbox (201), with a rack (202) formed on the inner wall of the reduction gearbox (201). A first-stage planetary gear (210) and a second-stage planetary gear (206) mesh inside the reduction gearbox (201). A planetary gear carrier (208) is provided between the first-stage planetary gear (210) and the second-stage planetary gear (206). A first-stage sun gear (211) is fixedly connected to the power output shaft (101). The planetary gear carrier (208) A secondary sun gear (207) is fixedly connected to one side, and a first connecting post (209) is fixedly connected to the other side. The primary planetary gear (210) meshes with the primary sun gear (211) and is connected to the planetary gear carrier (208) through the first connecting post (209). The output shaft disk (203) is provided with a second connecting post (204). The secondary planetary gear (206) meshes with the secondary sun gear (207) and is connected to the output shaft disk (203) through the second connecting post (204).

3. The servo motor according to claim 2, characterized in that, The output shaft disk (203) has a protruding tooth (205) on the side facing the helical gear (301), and the helical gear (301) has a recessed tooth (302) on the side facing the output shaft disk (203). The protruding tooth (205) and the recessed tooth (302) are connected in a cooperative manner.

4. The servo motor according to claim 3, characterized in that, The gearbox (201) and the side-exit bevel gear (303) are connected by a fixing frame (4). The fixing frame (4) is mounted on the gearbox (201) to support the side-exit bevel gear (303) and maintain the meshing of the side-exit bevel gear (303) and the helical gear (301).

5. The servo motor according to claim 1, characterized in that, The side-exit bevel gear (303) is fixedly connected to a cylindrical pin connector (5), and the end face of the pin connector (5) is formed with a cross shaft hole (501), and a plurality of circular shaft holes (502) are formed around the cross shaft hole (501).

6. The servo motor according to claim 5, characterized in that, The end face of the side-exit bevel gear (303) away from the pin connector (5) has a cross groove (304).

7. The servo motor according to claim 1, characterized in that, The motor mechanism (1) includes a motor (102), an optical encoder (103) disposed on the end face of the motor (102) opposite to the power output shaft (101), a drive circuit board (104) and a reset circuit board (106) disposed opposite to each other on the side of the motor (102), the drive circuit board (104) and the reset circuit board (106) being electrically connected, the drive circuit board (104) being provided with a photoelectric pair (105), the photoelectric pair (105) measuring the rotational speed of the motor (102) through the optical encoder (103).

8. The servo motor according to claim 7, characterized in that, The reset circuit board (106) is provided with pin headers (107) that extend outward along the axial direction of the motor (102).

9. The servo motor according to claim 8, characterized in that, The reset circuit board (106) is equipped with an indicator light (108) and an operation button (109).

10. The servo motor according to claim 9, characterized in that, The motor core (1) is housed in the lower housing (6) that fixes the motor core (1). The surface of the lower housing (6) is provided with a light guide hole (601) for the indicator light (108) to pass through and an integrated injection molded button (602). The planetary gear mechanism (2) and the output shaft mechanism (3) are housed in the upper housing (7). The upper housing (7) is formed with a plug plate (701). The lower housing (6) is formed with a plug groove (603) corresponding to the plug plate (701).

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