Transmission assembly with damping type clutch structure

Abstract

The utility model discloses a transmission assembly with a damping type clutch structure, which comprises a transmission shaft part, a rotary transmission part capable of rotating relative to the axial direction of the transmission shaft part is connected onto the transmission shaft part, and a clutch part positioned on one side of the rotary transmission part is further connected onto the transmission shaft part. The clutch part is connected to the transmission shaft part in a sliding mode in the axial direction and can rotate along with the transmission shaft part, so that the clutch part can be attached to or away from the rotary transmission part in the axial direction, and an elastic element capable of providing pre-tightening force to push the clutch part to be attached to the rotary transmission part is further arranged between the transmission shaft part and the clutch part. A clutch structure is arranged between the rotary transmission part and the clutch part, when the torque of the rotary transmission part and the clutch part is smaller than a preset value, the rotary transmission part and the clutch part are in close transmission, and when the torque of the rotary transmission part and the clutch part is larger than the preset value, the clutch part is separated from the rotary transmission part. The transmission assembly with the damping type clutch structure is compact in structure and good in protection effect.

Description

Technical Field

[0001] This utility model specifically relates to a transmission component with a damped clutch structure. Background Technology

[0002] In existing technologies, small motors are widely used in various electric devices, and they typically have an internal transmission structure that transmits the rotational power generated by the rotor to the output shaft. This transmission structure generally includes one or more transmission gears to achieve the conversion and transmission of speed and torque. To reduce noise generated during operation and to reduce overall weight, existing transmission gears are mostly made of plastic materials.

[0003] However, due to the compact structure of small motors and the small size of their transmission gears, although plastic gears have good shock absorption and noise reduction properties, their strength is relatively low, making them prone to deformation or even breakage when subjected to large torques. Especially when the output shaft experiences abnormal resistance or sudden load changes, the torque at the motor output end rises sharply, which can easily damage the transmission gears, thereby affecting the normal operation of the entire transmission system and even causing equipment failure.

[0004] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a transmission component with a damped clutch structure that is compact in structure and has good protection effect.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model provides a transmission assembly with a damped clutch structure, including a transmission shaft, a rotary transmission component that can rotate relative to the shaft axis, and a clutch component located on one side of the rotary transmission component. The clutch component is slidably connected to the transmission shaft along the axial direction and can rotate with the transmission shaft, thereby allowing the clutch component to axially approach or move away from the rotary transmission component. An elastic element that can provide a preload force to push the clutch component to approach the rotary transmission component is also provided between the transmission shaft and the clutch component. A clutch structure is provided between the rotary transmission component and the clutch component, which allows them to approach and transmit when their torques are less than a preset value, and allows the latter to disengage from the former when their torques are greater than the preset value.

[0008] The transmission assembly with damped clutch structure as described above includes a plurality of protruding teeth disposed on the clutch element and protruding toward the rotating transmission element, and tooth grooves formed on the rotating transmission element for the protruding teeth to be inserted.

[0009] In the transmission assembly with damped clutch structure described above, the protruding teeth and tooth grooves are both radially extended and uniformly distributed circumferentially.

[0010] In the transmission assembly with damped clutch structure described above, the cross-section of the convex tooth is triangular or semi-circular, and the cross-sectional shape of the tooth groove matches the convex tooth.

[0011] In the transmission assembly with damped clutch structure described above, the rotary transmission component is a gear component, and its outer peripheral edge is provided with gear teeth for meshing with external gears.

[0012] As described above, in the transmission assembly with a damped clutch structure, the transmission shaft has a first shaft section for connecting the clutch, the clutch has a first mounting hole through which the first shaft section passes, allowing the clutch to slide axially, the first shaft section has a limiting structure that prevents the clutch from rotating, and the first mounting hole matches the shape of the first shaft section.

[0013] In the transmission assembly with damped clutch structure described above, the transmission shaft is provided with a first shoulder on the first shaft section, and the elastic element is disposed between the first shoulder and the clutch component.

[0014] In the transmission assembly with damped clutch structure described above, the elastic element is an integral structure made of elastic plastic or rubber, or the elastic element is a spring, spring pad, or wave pad.

[0015] As described above, in the transmission assembly with damped clutch structure, the transmission shaft is a one-piece structure made of metal, and the rotary transmission component is a one-piece structure made of plastic, metal, or a plastic-metal composite.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. Achieve overload protection and improve the reliability of the transmission system. By setting a clutch structure with a preset torque response between the rotary transmission component and the clutch component, the transmission connection can be automatically disconnected when the output shaft is subjected to excessive resistance, effectively preventing damage to the transmission gears caused by excessive torque, and significantly improving the operational stability and service life of the entire transmission system.

[0018] 2. Compact structure, adaptable to the application needs of small motors. This transmission component adopts an axial sliding clutch combined with an elastic element structure design. The overall layout is reasonable and the size is small. It is especially suitable for the internal structure of small motors with limited space, and meets the needs of modern electronic products for miniaturized and lightweight transmission components.

[0019] 3. The clutch structure is highly responsive, with smooth and reliable disconnection and reset processes. The clutch structure achieves torque transmission and disconnection through the cooperation of the convex teeth and the tooth groove, resulting in a fast response speed. Furthermore, the elastic element adopts a horn-shaped structure, which makes the elastic force change more linear during compression and reset, thereby improving the smoothness and repeatability of the transmission switching process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the transmission component according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the transmission component according to Embodiment 1 of this utility model;

[0022] Figure 3 This is an exploded view of the transmission component according to Embodiment 1 of this utility model. Figure 1 ;

[0023] Figure 4 This is an exploded view of the transmission component according to Embodiment 1 of this utility model. Figure 2 ;

[0024] Figure 5 This is a cross-sectional schematic diagram of the transmission component according to Embodiment 2 of this utility model;

[0025] Figure 6 This is an exploded view of the transmission component according to Embodiment 2 of this utility model;

[0026] Figure 7 This is a reference diagram showing the usage state of the transmission component of this utility model. Detailed Implementation

[0027] The utility model will be further described below with reference to the accompanying drawings:

[0028] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0029] Example 1

[0030] This embodiment introduces a transmission assembly with a damped clutch structure, which is mainly used in small motors, such as... Figure 7 As shown, its function is to transmit the torque generated by the rotor to the output shaft. Figures 1 to 4As shown, the transmission assembly includes a transmission shaft 1, on which a rotary transmission component 2 capable of rotating relative to its axial direction is connected. A clutch component 3 is provided on one side of the rotary transmission component 2. The clutch component 3 is slidably connected to the transmission shaft 1 along the axial direction and can rotate synchronously with the transmission shaft 1, thereby realizing the action of the clutch component 3 approaching or disengaging relative to the rotary transmission component 2.

[0031] An elastic element 4 is provided between the transmission shaft 1 and the clutch 3 to provide a preload force to push the clutch 3 toward the rotary transmission component 2. A clutch structure 5 is provided between the rotary transmission component 2 and the clutch 3. When the transmitted torque between the two is less than a preset value, the clutch structure 5 keeps the two connected; when the torque exceeds the preset value, the clutch structure 5 automatically disconnects the transmission connection, realizing an overload protection function.

[0032] Specifically, the clutch structure 5 includes multiple protruding teeth 31 disposed on the clutch member 3 and protruding towards the rotary transmission member 2, and tooth grooves 21 formed on the rotary transmission member 2 for the protruding teeth 31 to be inserted into. The cross-sectional shape of the protruding teeth 31 can be triangular or semi-circular, and the cross-sectional shape of the tooth grooves 21 matches accordingly. Of course, in other embodiments, the protruding teeth 31 and tooth grooves 21 can also adopt other adaptable shapes such as trapezoids or rounded rectangles.

[0033] As an alternative implementation, the clutch structure 5 can also adopt a slanted surface engagement form: for example, an inclined surface is provided on the rotary transmission component 2, and a corresponding matching inclined surface is provided on the clutch component 3 to form a ratchet-like structure; or torque transmission and disconnection can be achieved by controlling the friction between the contact surfaces of the rotary transmission component 2 and the clutch component 3.

[0034] In actual use, the rotary transmission component 2 is connected to the external drive structure and is driven to rotate. Due to the action of the elastic element 4, the clutch 3 is always in contact with the rotary transmission component 2, enabling the rotary transmission component 2 to drive the clutch 3 to rotate, thereby driving the transmission shaft 1 to rotate. When the transmission shaft 1 is subjected to greater resistance, the torque between the rotary transmission component 2 and the clutch 3 will exceed the preset value. At this time, the interaction between the convex tooth 31 and the tooth groove 21 will push the clutch 3 to disengage from the rotary transmission component 2, while compressing the elastic element 4, thereby cutting off the power transmission path between the rotary transmission component 2 and the transmission shaft 1, and playing an overload protection role for the rotary transmission component 2.

[0035] The preset value is the minimum torque required for the rotary transmission component 2 and the clutch component 3 to compress the elastic element 4. This preset value can be set by adjusting parameters such as the elastic coefficient and thickness of the elastic element 4, and should be reasonably designed according to the maximum torque that the rotary transmission component 2 can withstand.

[0036] As a preferred embodiment, such as Figure 3 As shown, both the convex tooth 31 and the tooth groove 21 extend radially and are evenly distributed circumferentially to ensure the stability and uniformity of torque transmission.

[0037] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the rotary transmission component 2 is a gear component, with gear teeth 22 on its outer peripheral edge for meshing with external gears, thereby achieving a power connection with the rotor through meshing with other gears or gear sets. Of course, the rotary transmission component 2 can also take other forms, such as pulleys, ratchet wheels, or swing arms as alternative structures.

[0038] As a preferred structure, in this embodiment, the elastic element 4 is made of elastic plastic or rubber material and constructed into a one-piece funnel-shaped structure, giving it a more linear elastic force change characteristic when deformed under pressure, thereby improving the smoothness of the transmission process. Alternatively, the elastic element can also be a spring, a spring pad, or a wave pad. The transmission shaft 1 is a one-piece structure made of metal material, while the rotary transmission component 2 is made of plastic material. Of course, the rotary transmission component 2 can also be made of metal material or a composite of plastic and metal. This structure balances strength and lightweight requirements.

[0039] Further details on the connection structure of each component: The transmission shaft 1 includes a first shaft segment 11 for connecting the clutch 3. The clutch 3 has a through hole—a first mounting hole 30—through which the first shaft segment 11 passes, thereby enabling the clutch 3 to slide axially. A limiting structure 111 is provided on the first shaft segment 11 to prevent relative rotation of the clutch 3, and the inner wall shape of the first mounting hole 30 matches the outer shape of the first shaft segment 11; that is, the first shaft segment 11 has a cutout, or the first shaft segment 11 is designed with a non-circular cross-section. A first shoulder 12 is provided on the first shaft segment 11 of the transmission shaft 1. The elastic element 4 is disposed between the first shoulder 12 and the clutch 3, and has a trumpet-shaped structure that gradually expands from the first shoulder 12 towards the clutch 3. The transmission shaft 1 also includes a second shaft segment 13 connected to the first shaft segment 11, forming a shoulder 14 between them. The rotary transmission component 2 has a circular second mounting hole 20 fitted onto the second shaft segment 13. Furthermore, the transmission shaft 1 also includes a third shaft section 15 connected to the second shaft section 13. A first locking member 6 is fixedly installed on the third shaft section 15 by interference fit, which is used to firmly lock the rotary transmission member 2, the clutch member 3 and the elastic element 4 on the transmission shaft 1 in the axial direction, so as to ensure the stability and reliability of the overall structure.

[0040] Example 2

[0041] This embodiment introduces a transmission assembly with a damped clutch structure. Unlike Embodiment 1, it does not employ a first locking element 6 for locking. Instead, in this embodiment, as... Figure 5 and Figure 6 As shown, the second shaft segment 13 is provided with an annular groove 131, and a second locking member 7 is sleeved on the second shaft segment 13. The second locking member 7 is provided with a third mounting hole 70 sleeved on the second shaft segment 13. The wall of the third mounting hole 70 is provided with a snap-fit ​​protrusion 71 that can deform and be used to snap into the annular groove 131.

[0042] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A transmission assembly with a damped clutch structure, characterized in that: The device includes a drive shaft (1), on which a rotary transmission component (2) capable of rotating relative to its axial direction is connected. A clutch component (3) located on one side of the rotary transmission component (2) is also connected to the drive shaft (1). The clutch component (3) is slidably connected to the drive shaft (1) along the axial direction and can rotate with the drive shaft (1), thereby enabling the clutch component (3) to axially approach or move away from the rotary transmission component (2). An elastic element (4) is provided between the drive shaft (1) and the clutch component (3) to provide a preload force to push the clutch component (3) to approach the rotary transmission component (2). A clutch structure (5) is provided between the rotary transmission component (2) and the clutch component (3) to allow them to approach and drive each other when their torques are less than a preset value, and to disengage the latter from the former when their torques are greater than a preset value.

2. The transmission assembly with damped clutch structure according to claim 1, characterized in that: The clutch structure (5) includes several protruding teeth (31) disposed on the clutch member (3) and protruding toward the rotary transmission member (2), and tooth grooves (21) formed on the rotary transmission member (2) for the protruding teeth (31) to be inserted.

3. The transmission assembly with damped clutch structure according to claim 2, characterized in that: The protruding teeth (31) and the tooth grooves (21) are both radially extended and uniformly distributed circumferentially.

4. The transmission assembly with damped clutch structure according to claim 2, characterized in that: The cross-section of the protruding tooth (31) is triangular or semi-circular, and the cross-sectional shape of the tooth groove (21) matches that of the protruding tooth (31).

5. The transmission assembly with damped clutch structure according to claim 1, characterized in that: The rotary transmission component (2) is a gear component, and its outer peripheral edge is provided with gear teeth (22) for meshing with external gears.

6. The transmission assembly with damped clutch structure according to claim 1, characterized in that: The transmission shaft (1) has a first shaft section (11) for connecting the clutch (3). The clutch (3) is provided with a first mounting hole (30) through which the first shaft section (11) passes, so that the clutch (3) can slide axially. The first shaft section (11) is provided with a limiting structure (111) that can prevent the clutch (3) from rotating. The first mounting hole (30) matches the shape of the first shaft section (11).

7. The transmission assembly with damped clutch structure according to claim 6, characterized in that: The transmission shaft (1) has a first shoulder (12) on the first shaft section (11), and the elastic element (4) is located between the first shoulder (12) and the clutch (3).

8. The transmission assembly with damped clutch structure according to any one of claims 1-7, characterized in that: The elastic element (4) is an integral structure made of elastic plastic or rubber, or the elastic element (4) is a spring, spring pad or wave pad.

9. The transmission assembly with damped clutch structure according to any one of claims 1-7, characterized in that: The transmission shaft (1) is an integral structure made of metal, and the rotary transmission component (2) is an integral structure made of plastic, metal or plastic-metal composite.

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