Clutch steering gear to prevent damage from overrunning

Abstract

A clutch servo motor for preventing gear damage from overload operation is disclosed, relating to the field of servo motor technology. The technical solution includes a drive unit and a reduction gear set connected to the drive unit. The reduction gear set includes coaxial output teeth, transmission teeth, and a limiting component to prevent axial displacement between the output and transmission teeth. The transmission teeth are connected to the drive unit, and the output and transmission teeth can rotate relative to each other. A clutch unit is provided between the output and transmission teeth. The clutch unit includes an elastic element, a smooth protrusion, and a slot. The elastic element presses the smooth protrusion into the slot. This invention utilizes the elastic element to press the smooth protrusion into the slot to transmit torque. During overload operation, when the torque exceeds a preset value, the smooth protrusion slides out of the slot, causing the transmission and output teeth to rotate relative to each other, thus protecting the reduction gear set. Its structure is simple and occupies a small volume.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology, and in particular to a clutch servo motor that prevents damage to gears from overload operation. Background Technology

[0002] A servo motor is a position (angle) servo actuator suitable for control systems that require continuous angle changes and the ability to maintain those angles. It is widely used in high-end remote-controlled toys, such as airplane and submarine models, and remote-controlled robots. It mainly consists of a shell, motor, reduction gear set, and potentiometer. Traditional servo motors, due to limited internal space, lack a clutch mechanism, making their transmission gears prone to damage under overload conditions and failing to guarantee their expected lifespan. Utility Model Content

[0003] To address the problem that servo drive gears are easily damaged under overload conditions in existing technical solutions, this utility model provides a clutch servo that prevents gear damage from overload operation.

[0004] This utility model provides the following technical solution: a clutch servo motor to prevent gear damage from overload operation, including a drive unit and a reduction gear set that is driven by the drive unit. The reduction gear set includes coaxial output teeth and transmission teeth, and a limiting member to prevent axial displacement between the output teeth and the transmission teeth. The transmission teeth are driven by the drive unit. The output teeth and the transmission teeth can rotate relative to each other, and a clutch unit is provided between the output teeth and the transmission teeth.

[0005] The clutch unit includes an elastic element, a smooth protrusion, and a slot on the transmission tooth, or the clutch unit includes an elastic element, a smooth protrusion, and a slot on the output tooth; the elastic element presses the smooth protrusion into the slot.

[0006] Preferably, the clutch unit includes a groove disposed on the side of the transmission tooth facing the output tooth, the elastic element is a compression spring disposed in the groove, the smooth protrusion is a ball disposed on the end of the compression spring facing the output tooth, the side of the output tooth facing the transmission tooth is provided with a groove that cooperates with the ball, and the compression spring presses a portion of the smooth protrusion into the groove.

[0007] Preferably, the plurality of grooves, compression springs, and balls are symmetrical about the central axis of the transmission teeth, the plurality of slots are symmetrical about the central axis of the output teeth, and the number of slots is an integer multiple of the number of balls.

[0008] Preferably, the clutch unit includes a spring plate inserted into the output tooth, the elastic element is an elastic arm disposed on the spring plate, the smooth protrusion is a hemisphere disposed on the side of the elastic arm facing the transmission tooth, the transmission tooth is provided with a groove that cooperates with the smooth protrusion, and the elastic arm presses the smooth protrusion into the groove.

[0009] Preferably, the plurality of elastic arms and slots are symmetrical about the central axis of the transmission gear, and the number of slots is an integer multiple of the number of the smooth protrusions.

[0010] Preferably, it also includes a rotating shaft, the output teeth are connected to the rotating shaft in a driving connection, the driving teeth are rotatably connected to the rotating shaft, and a potentiometer is provided at the end of the rotating shaft.

[0011] Preferably, the output tooth has a flange on the side facing the transmission tooth, the limiting member is connected to the transmission tooth and the limiting member has a limiting groove for locking the flange.

[0012] Preferably, the rotating shaft is provided with the limiting member, the limiting member is provided with a flange, the transmission tooth is rotatably connected to the limiting member, and the side of the transmission tooth facing away from the output tooth is provided with a limiting groove corresponding to the flange; the output tooth is also provided with a flange.

[0013] The beneficial effects of this utility model are: a clutch unit is set between the transmission gear and the output gear, and a limiting component is used to prevent the transmission gear and the output gear from axial displacement. The clutch unit uses an elastic element to press the smooth protrusion into the slot to transmit torque. When the torque exceeds the preset value during overload operation, the smooth protrusion slides out of the slot, causing the transmission gear and the output gear to rotate relative to each other, thus protecting the reduction gear set. Its structure is simple and occupies a small volume. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of one embodiment of a clutch servo motor.

[0015] Figure 2 This is a cross-sectional view of one embodiment of a clutch servo motor.

[0016] Figure 3 An exploded view of one embodiment of a clutch servo motor.

[0017] Figure 4 This is a schematic diagram of the output gear of one embodiment of a clutch servo motor.

[0018] Figure 5 This is a schematic diagram of another embodiment of the clutch servo motor.

[0019] Figure 6 This is a cross-sectional view of another embodiment of the clutch servo motor.

[0020] Figure 7 Explosion of another embodiment of the clutch servo motor Figure I .

[0021] Figure 8 Explosion of another embodiment of the clutch servo motor Figure II .

[0022] Reference numerals: 10, drive unit; 20, reduction gear set; 21, output tooth; 211, flange; 212, slot; 22, transmission tooth; 221, rivet; 222, limiting groove; 23, rotating shaft; 24, limiting component; 241, limiting groove; 242, flange; 31, groove; 32, compression spring; 33, ball bearing; 34, slot; 40, spring sheet; 41, columnar body; 42, elastic arm; 43, rounded protrusion; 44, slot; 50, potentiometer; 60, housing. Detailed Implementation

[0023] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0024] Example 1

[0025] This utility model provides, for example Figure 1-4 The clutch servo motor shown is designed to prevent gear damage from overload operation. It includes a drive unit 10 and a reduction gear set 20 that is drively connected to the drive unit 10. The drive unit 10 is typically an electric motor, and the reduction gear set 20 can be referenced from [other specifications]. Figure 1 Based on existing technology, torque is output through multi-stage cylindrical gear transmission.

[0026] In this embodiment, the reduction gear set 20 includes coaxial output teeth 21 and transmission teeth 22. Please refer to... Figure 2 The output tooth 21 is connected to the rotating shaft 23 via a spline. A potentiometer 50 is also provided at the end of the rotating shaft 23, which rotates synchronously with the output tooth 21 and feeds back a position signal to the controller for precise positioning. The transmission tooth 22 is connected to the drive unit 10 and is rotatably connected to the rotating shaft 23. The output tooth 21 has a flange 211 facing the transmission tooth 22. The transmission tooth 22 is connected to a limiting member 24 via multiple rivets 221. The limiting member 24 has a limiting groove 241 that engages the flange 211, preventing axial displacement of the output tooth 21 relative to the transmission tooth 22.

[0027] The transmission gear 22 is connected to the output gear 21 via the first clutch unit. Please refer to... Figure 3 , 4The first clutch unit includes three grooves 31 disposed on the side of the transmission gear 22 facing the output gear 21. A compression spring 32 is disposed within each groove 31, and a rollable ball 33 is disposed at the end of the compression spring 32 facing the output gear 21. The three grooves, compression springs, and balls are all symmetrical about the central axis of the transmission gear 22. The side of the output gear 21 facing the transmission gear 22 has six slots 34 that mate with the balls 33. The slots 34 can be spherical or curved, and the six slots 34 are symmetrical about the central axis of the output gear 21. In other embodiments, the number of grooves, compression springs, balls, and slots can be selected according to actual conditions, and the number of slots is an integer multiple of the number of balls.

[0028] During normal operation, the compression spring 32 pushes the ball 33 partially into the slot 34 to transmit torque, and the transmission gear 22 drives the output gear 21 to rotate. When overloaded, the torque exceeds the preset value, the ball 33 slides out of the slot 34, and the output gear 21 can press the ball 33 into the groove 31. The output gear 21 and the transmission gear 22 rotate relative to each other, thereby protecting the reduction gear set.

[0029] Example 2

[0030] This utility model provides, for example Figure 5-8 The clutch servo motor shown is designed to prevent gear damage from overload operation. It includes a housing 60, a drive unit 10, and a reduction gear set 20 that is drively connected to the drive unit 10. The drive unit 10 is typically an electric motor, and the reduction gear set 20 can be referenced from [other specifications]. Figure 5 Based on existing technology, torque is output through multi-stage cylindrical gear transmission.

[0031] In this embodiment, the reduction gear set 20 includes coaxial output teeth 21 and transmission teeth 22. Please refer to... Figure 6 The output tooth 21 is connected to the rotating shaft 23 via a spline. A potentiometer 50 is also provided at the end of the rotating shaft 23, which rotates synchronously with the output tooth 21 and feeds back a position signal to the controller for precise positioning. The rotating shaft 23 is provided with a limiting member 24, which has a flange 242. The transmission tooth 22 is rotatably connected to the limiting member 24 and is also connected to the drive unit 10. A limiting groove 222 is provided on the side of the transmission tooth 22 facing away from the output tooth 21, and the flange 242 is engaged in the limiting groove 222. Similarly, the output tooth 21 also has a flange 211, which is held in place by the housing 60. Under the limiting effect of the housing 60 and the limiting member 24, axial displacement between the transmission tooth 22 and the output tooth 21 is prevented.

[0032] A second clutch unit is also provided between the output gear 21 and the transmission gear 22. Please refer to... Figure 6-8The second clutch unit includes a spring plate 40 disposed between the output tooth 21 and the transmission tooth 22. The spring plate 40 is provided with a plurality of columnar bodies 41, and the output tooth 21 is provided with a slot 212 that mates with the columnar bodies 41, so that the spring plate 40 is inserted into the output tooth 21. The spring plate 40 is also provided with a plurality of elastic arms 42 symmetrical about the central axis of the transmission tooth 22. The elastic arms 42 are provided with a smooth protrusion 43 on the side facing the transmission tooth 22, and the transmission tooth 22 is provided with a groove 44 that mates with the smooth protrusion 43.

[0033] The elastic arm 42 is made of an elastic material. The smooth protrusion 43 is a smooth curved surface structure that facilitates sliding out of the slot 44, and is usually hemispherical or semi-cylindrical. The slot 44 is a spherical or cylindrical curved surface that mates with it. The multiple slots 44 are also symmetrical about the central axis of the transmission gear, and the number of slots 44 is an integer multiple of the number of smooth protrusions 43.

[0034] During normal operation, the elastic arm 42 presses the smooth protrusion 43 into the slot 44 to transmit torque, and the transmission gear 22 drives the spring 40 and the output gear 21 to rotate. When overloaded, the torque exceeds the preset value, and the smooth protrusion 43 can slide out of the slot 44, causing relative rotation between the transmission gear 22 and the spring 40, thereby protecting the reduction gear set.

[0035] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A clutch servo motor for preventing gear damage from overload operation, comprising a drive unit and a reduction gear set transmittedly connected to the drive unit, characterized in that: The reduction gear set includes coaxial output teeth and transmission teeth, as well as a limiting member to prevent axial displacement between the output teeth and transmission teeth; the transmission teeth are connected to the drive unit, the output teeth and transmission teeth can rotate relative to each other, and a clutch unit is provided between the output teeth and transmission teeth. The clutch unit includes an elastic element, a smooth protrusion, and a slot on the transmission tooth, or the clutch unit includes an elastic element, a smooth protrusion, and a slot on the output tooth; the elastic element presses the smooth protrusion into the slot.

2. A clutch servo motor for preventing gear damage from overload operation according to claim 1, characterized in that, The clutch unit includes a groove disposed on the side of the transmission tooth facing the output tooth, the elastic element being a compression spring disposed in the groove, the smooth protrusion being a ball disposed on the end of the compression spring facing the output tooth, the side of the output tooth facing the transmission tooth having a groove that mates with the ball, and the compression spring pressing a portion of the smooth protrusion into the groove.

3. A clutch servo motor for preventing gear damage from overload operation according to claim 2, characterized in that, The plurality of grooves, compression springs, and balls are symmetrical about the central axis of the transmission gear, and the plurality of slots are symmetrical about the central axis of the output gear, and the number of slots is an integer multiple of the number of balls.

4. A clutch servo motor for preventing gear damage from overload operation according to claim 1, characterized in that, The clutch unit includes a spring plate inserted into the output tooth, the elastic element is an elastic arm disposed on the spring plate, the smooth protrusion is a hemisphere disposed on the side of the elastic arm facing the transmission tooth, the transmission tooth is provided with a groove that cooperates with the smooth protrusion, and the elastic arm presses the smooth protrusion into the groove.

5. A clutch servo motor for preventing gear damage from overload operation according to claim 4, characterized in that, The plurality of elastic arms and slots are symmetrical about the central axis of the transmission gear, and the number of slots is an integer multiple of the number of the smooth protrusions.

6. A clutch servo motor for preventing gear damage from overload operation according to claim 1, characterized in that, It also includes a rotating shaft, the output teeth are connected to the rotating shaft in a transmission manner, the transmission teeth are rotatably connected to the rotating shaft, and a potentiometer is also provided at the end of the rotating shaft.

7. A clutch servo motor for preventing gear damage from overload operation according to claim 6, characterized in that, The output tooth has a flange facing the transmission tooth, and the limiting member is connected to the transmission tooth and has a limiting groove that locks the flange.

8. A clutch servo motor for preventing gear damage from overload operation according to claim 6, characterized in that, The rotating shaft is provided with the limiting member, the limiting member is provided with a flange, the transmission tooth is rotatably connected to the limiting member, and the side of the transmission tooth facing away from the output tooth is provided with a limiting groove corresponding to the flange; the output tooth is also provided with a flange.

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