KR-20260062836-A - Worm gear actuator device with clutch function

Abstract

The present invention relates to a worm gear actuator device including a clutch function, and more specifically, to a worm gear actuator device including a clutch function that enables reverse rotation by user operation. To achieve the above objective, one aspect of the present invention may include a worm comprising a worm shaft extending along the longitudinal direction, a worm wheel meshing with and rotating on the worm, and a clutch portion connected to one end of the worm and selectively connecting or disconnecting the worm and the worm wheel by moving the worm radially relative to the worm wheel.

Inventors

• 곽유현
• 이동렬

Assignees

• 주식회사 이스턴기어

Dates

Publication Date

20260507

Application Date

20251002

Priority Date

20241029

Claims (6)

1. A worm comprising a worm shaft extending along the longitudinal direction; A worm wheel that meshes with and rotates the above worm; and A worm gear actuator device having a clutch function, comprising: a clutch portion connected to one end of the worm and moving the worm radially relative to the worm wheel to selectively connect or disconnect the worm and the worm wheel.
2. In paragraph 1, The above clutch part is, A worm gear actuator device including a clutch function that lifts one end of the worm shaft to selectively connect or disconnect the worm and the worm wheel.
3. In paragraph 2, The above clutch part is, A worm gear actuator device having a clutch function, comprising an insertion groove into which at least a portion of one end of the worm shaft is inserted, and a clutch disc rotatably provided when the worm shaft is inserted.
4. In paragraph 3, The above clutch disc is, A worm gear actuator device including a clutch function, wherein the insertion groove is formed eccentrically with respect to the center of rotation.
5. In paragraph 2, A worm gear actuator device having a clutch function, further comprising joints disposed on each side of the worm shaft.
6. In paragraph 5, The above joint is, A worm gear actuator device including a clutch function, which is a U-joint configured to allow the angle of shafts connected to both sides to be changed.

Description

Worm gear actuator device with clutch function The present invention relates to a worm gear actuator device including a clutch function, and more specifically, to a worm gear actuator device including a clutch function that enables reverse rotation by user operation. Generally, a gear assembly operates by multiple gears meshing together. In other words, when a power source is connected to the input shaft, the gear connected to the input shaft rotates, causing other gears connected to it to rotate in a chain reaction and transmit power to the output shaft. Meanwhile, a wide variety of gears have been developed and are in use. Since each gear differs functionally, device designers combine and utilize various gears depending on the functions and characteristics of the device being designed. For example, gears such as spur gears and helical gears have the characteristic of enabling reverse rotation, in which the input shaft rotates when the output shaft is rotated in the opposite direction. On the other hand, gear assemblies including worm gears and worm wheels have a large reduction ratio due to large gear ratios and friction angles, and have a large torque transmission capability, but generally have the characteristic that free reverse rotation is impossible. This function of a worm gear that cannot be freely reversed is called the self-locking function of the worm gear. Meanwhile, due to the need for a large reduction ratio and large torque transmission, there are cases where reverse rotation of the gear assembly including the worm gear is required in devices using worm gears depending on the situation. However, in the past, technology was not developed to allow the user to freely control the reverse rotation of the worm gear, which caused inconvenience to the user or, if necessary, dangerous situations. Accordingly, there is a need for the development of a worm gear actuator that allows the user to easily control whether the worm gear rotates in reverse. Figure 1 is a diagram illustrating the driving force transmission process of a general gear. Figure 2 is a diagram illustrating the driving force transmission process of a worm gear. FIG. 3 is a schematic diagram illustrating an application example to explain the necessity of a worm gear actuator device including a clutch function according to the present invention. FIG. 4 is a block diagram illustrating the configuration of a worm gear actuator device including a clutch function according to an embodiment of the present invention. Figure 5 is a diagram illustrating a method for implementing the clutch function of the clutch part of Figure 4. FIG. 6 is a schematic diagram illustrating the internal structure of a worm gear actuator device including a clutch function according to one embodiment of the present invention. FIG. 7 is a schematic plan view illustrating the clutch disc of FIG. 6. FIG. 8 is a drawing showing one side of the worm of FIG. 6. Figure 9 is a drawing showing the other side of the worm of Figure 6. FIGS. 10 and FIGS. 11 are drawings for explaining the operation of the clutch part. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated. In the following embodiments, the x-axis, y-axis, and z-axis are not limited to three axes in an orthogonal coordinate system and can be interpreted in a broader sense that includes them. For example, the x-axis, y-axis, and z-axis may be