Transmission assembly with damping type clutch structure

Abstract

The invention discloses a transmission assembly with a damping type clutch structure, which comprises a transmission shaft piece, the transmission shaft piece is connected with a rotary transmission piece capable of rotating relative to the axial direction of the transmission shaft piece, and the transmission shaft piece is further connected with a clutch piece located on one side of the rotary transmission piece. 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 torque of the clutch part are smaller than a preset value, the clutch structure enables the rotary transmission part and the clutch part to be in attached transmission, and when the torque of the rotary transmission part and the torque of the clutch part are larger than the preset value, the clutch part is separated from the rotary transmission part.

Description

Technical Field

[0001] The present invention particularly relates to a transmission assembly with a damping clutch structure. Background Art

[0002] Small motors are widely used in various electric devices. They typically incorporate a transmission structure that transfers the rotational power generated by the rotor to the output shaft. This transmission structure typically includes one or more transmission gears, which convert and transmit speed and torque. To reduce noise and overall weight during operation, existing transmission gears are often made of plastic.

[0003] However, due to the compact structure of small motors and the small size of their transmission gears, while plastic gears offer excellent vibration and noise reduction, they are relatively weak and prone to deformation or even fracture when subjected to high torque. This is especially true when the output shaft experiences unusual resistance or sudden load changes, causing a sharp increase in torque at the motor's output, which can easily damage the transmission gears, affecting the normal operation of the entire transmission system and even causing equipment failure.

[0004] The present invention is just produced based on above-mentioned deficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a transmission assembly with a damping clutch structure that has a compact structure and good protection effect.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides a transmission assembly with a damping clutch structure, including a transmission shaft, a rotating transmission member that can rotate axially relative to the transmission shaft is connected to the transmission shaft, and a clutch member located on one side of the rotating transmission member is also connected to the transmission shaft. The clutch member is axially slidably connected to the transmission shaft and can rotate with the transmission shaft, so that the clutch member can axially approach or move away from the rotating transmission member. An elastic element that can provide a pre-tightening force to push the clutch member against the rotating transmission member is also provided between the transmission shaft and the clutch member. A clutch structure is provided between the rotating transmission member and the clutch member, which enables the two to approach each other for transmission when the torque of the two is less than a preset value, and enables the latter to separate from the former when the torque of the two is greater than the preset value.

[0008] As described above, the transmission assembly with a damping clutch structure comprises a plurality of protruding teeth provided on the clutch member and protruding toward the rotating transmission member, and tooth grooves provided on the rotating transmission member and capable of receiving the protruding teeth.

[0009] In the transmission assembly with a damping clutch structure as described above, the protruding teeth and tooth grooves extend radially and are evenly distributed circumferentially.

[0010] In the transmission assembly with a damping clutch structure as described above, the cross section of the convex teeth is triangular or semicircular, and the cross section of the tooth groove matches the convex teeth.

[0011] In the transmission assembly with a damping clutch structure as described above, the rotating transmission member is a gear member, and the outer peripheral edge of the gear member is provided with a gear tooth portion for meshing with an external gear for transmission.

[0012] As described above, the transmission assembly with a damping clutch structure, the transmission shaft has a first shaft section for connecting to the clutch, the clutch is provided with a first assembly hole for the first shaft section to pass through, so that the clutch can slide axially, the first shaft section is provided with a limiting structure that can prevent the clutch from rotating, and the first assembly hole matches the shape of the first shaft section.

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

[0014] In the transmission assembly with a damping clutch structure as described above, the elastic element is an integrated structure made of elastic plastic or rubber, or the elastic element is a spring, a spring washer or a wave washer.

[0015] In the transmission assembly with a damping clutch structure as described above, the transmission shaft is an integrated structure made of metal, and the rotating transmission member is an integrated 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 transmission system reliability. By setting a clutch structure with a preset torque response between the rotating transmission member and the clutch member, the transmission connection can be automatically disconnected when the output shaft encounters excessive resistance, effectively preventing damage to the transmission gears caused by excessive torque, and significantly improving the operating stability and service life of the entire transmission system.

[0018] 2. Compact structure, adapted to the application requirements of small motors. This transmission assembly adopts the structural design of axial sliding clutch and elastic element. The overall layout is reasonable and the size is small. It is particularly suitable for the internal structure of small motors with limited space, meeting the needs of modern electronic products for miniaturized and lightweight transmission components.

[0019] 3. Sensitive response, smooth and reliable disconnection and reset process. The clutch structure realizes torque transmission and disconnection through the cooperation of convex teeth and tooth grooves, with fast response speed. The elastic element adopts a trumpet-shaped structure, which makes the elastic force change more linear during compression and reset, improving the smoothness and repeatability of the transmission switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a schematic structural diagram of a transmission assembly according to a first embodiment of the present invention;

[0021] Figure 2 is a schematic cross-sectional view of a transmission assembly according to a first embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the decomposition of the transmission assembly of the first embodiment of the present invention. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the decomposition of the transmission assembly of the first embodiment of the present invention. Figure 2 ;

[0024] Figure 5 is a schematic cross-sectional view of a transmission assembly according to a second embodiment of the present invention;

[0025] Figure 6 is an exploded schematic diagram of a transmission assembly according to a second embodiment of the present invention;

[0026] Figure 7 It is a reference diagram of the use state of the transmission component of the present invention. DETAILED DESCRIPTION

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

[0028] The directions described in the specification of the present invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions in the accompanying drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0029] Example 1

[0030] This embodiment introduces a transmission assembly with a damping clutch structure, which is mainly used in small motors, such as Figure 7 As shown in , 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, to which is connected a rotary transmission member 2 capable of axial rotation relative to the transmission shaft 1. A clutch member 3 is provided on one side of the rotary transmission member 2. The clutch member 3 is axially slidably connected to the transmission shaft 1 and can rotate synchronously with the transmission shaft 1, thereby enabling the clutch member 3 to abut or disengage with the rotary transmission member 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 rotating transmission member 2. A clutch structure 5 is provided between the rotating transmission member 2 and the clutch 3. When the torque transmitted between the two is less than a preset value, the clutch structure 5 maintains the transmission connection between the two. When the torque exceeds the preset value, the clutch structure 5 automatically disconnects the transmission connection, providing overload protection.

[0032] Specifically, the clutch structure 5 includes a plurality of protruding teeth 31 disposed on the clutch member 3 and protruding toward the rotating transmission member 2, and a tooth groove 21 provided on the rotating transmission member 2 for receiving the protruding teeth 31. The protruding teeth 31 may have a triangular or semicircular cross-sectional shape, and the cross-sectional shape of the tooth groove 21 may match this shape. Of course, in other embodiments, the protruding teeth 31 and tooth groove 21 may also adopt other matching shapes, such as a trapezoidal shape or a rounded rectangular shape.

[0033] As an alternative embodiment, the clutch structure 5 can also adopt a bevel matching form: for example, an inclined surface is set on the rotating transmission member 2, and a corresponding matching bevel is set on the clutch member 3 to form a ratchet-like structure; or torque transmission and disconnection are achieved by controlling the friction force between the contact surfaces of the rotating transmission member 2 and the clutch member 3.

[0034] During actual use, the rotary transmission member 2 is connected to an external drive structure and is driven to rotate. Due to the action of the elastic element 4, the clutch member 3 is always in contact with the rotary transmission member 2, allowing the rotary transmission member 2 to drive the clutch member 3 to rotate, thereby driving the transmission shaft 1 to rotate. When the transmission shaft 1 encounters significant resistance, the torque between the rotary transmission member 2 and the clutch member 3 will exceed a preset value. At this time, the interaction between the protruding teeth 31 and the tooth grooves 21 will push the clutch member 3 away from the rotary transmission member 2, while compressing the elastic element 4, thereby severing the power transmission path between the rotary transmission member 2 and the transmission shaft 1, thus protecting the rotary transmission member 2 from overload.

[0035] The preset value is the minimum torque required between the rotating transmission member 2 and the clutch member 3 to push the clutch member 3 to compress the elastic element 4. This preset value can be set by adjusting parameters such as the elastic modulus and thickness of the elastic element 4 and should be reasonably designed based on the maximum torque that the rotating transmission member 2 can withstand.

[0036] As a preferred embodiment, Figure 3 As shown, the protruding teeth 31 and the tooth grooves 21 extend radially and are evenly distributed along the circumference to ensure stability and uniformity of torque transmission.

[0037] Furthermore, if Figures 1 to 4 As shown, in this embodiment, the rotating transmission member 2 is a gear member, and its outer peripheral edge is provided with a gear tooth portion 22 for meshing with an external gear for transmission, thereby ultimately achieving a power connection with the rotor through meshing with other gears or gear sets. Of course, the rotating transmission member 2 can also adopt other forms, such as a pulley, ratchet, or swing arm.

[0038] As a preferred structure, in this embodiment, the elastic element 4 is made of elastic plastic or rubber material and is constructed into an integral trumpet-shaped structure, so that it has a more linear elastic force change characteristic when deformed by pressure, thereby improving the smoothness of the transmission process. In addition, the elastic element can also be a spring, a spring washer or a wave washer. The transmission shaft 1 is an integral structure made of metal material, while the rotating transmission member 2 is made of plastic material. Of course, the rotating transmission member 2 can also be made of metal material or a composite of plastic and metal. Through the above structure, both strength and lightweight requirements are taken into account.

[0039] The connection structure of each component is further described in detail: the transmission shaft 1 includes a first shaft segment 11 for connecting to the clutch 3. The clutch 3 is provided with a through-hole, a first assembly hole 30, through which the first shaft segment 11 passes, thereby enabling the clutch 3 to slide axially. A retaining structure 111 is provided on the first shaft segment 11 to prevent relative rotation of the clutch 3. The inner wall shape of the first assembly hole 30 matches the outer shape of the first shaft segment 11, that is, the first shaft segment 11 is provided with a notch, 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 this first shoulder 12 and the clutch 3 and has a trumpet-shaped structure that gradually expands from the first shoulder 12 toward 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 therebetween. The rotary transmission member 2 is provided with a circular second assembly hole 20 that sleeves on the second shaft segment 13. The transmission shaft 1 also includes a third shaft section 15 connected to the second shaft section 13, and a first locking member 6 is fixedly installed on the third shaft section 15 by interference fit, which is used to firmly lock the rotating transmission member 2, the clutch member 3 and the elastic element 4 on the transmission shaft 1 in the axial direction, thereby ensuring the stability and reliability of the overall structure.

[0040] Example 2

[0041] This embodiment introduces a transmission assembly with a damping clutch structure. The difference from the first embodiment is that the first locking member 6 is not used for locking. In this embodiment, Figure 5 and Figure 6 As shown, an annular groove 131 is provided on the second shaft segment 13, and a second locking piece 7 is sleeved on the second shaft segment 13. The second locking piece 7 is provided with a third assembly hole 70 sleeved on the second shaft segment 13, and a snap-fit ​​protrusion 71 that can generate deformation and be used to be snapped into the annular groove 131 is provided on the wall of the third assembly hole 70.

[0042] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A transmission assembly with a damping clutch structure, characterized in that: The invention comprises a transmission shaft (1), wherein the transmission shaft (1) is connected to a rotating transmission member (2) capable of rotating relative to the transmission shaft, and the transmission shaft (1) is also connected to a clutch member (3) located on one side of the rotating transmission member (2). The clutch member (3) is axially slidably connected to the transmission shaft (1) and can rotate along with the transmission shaft (1), so that the clutch member (3) can axially approach or move away from the rotating transmission member (2). An elastic element (4) capable of providing a pre-tightening force to push the clutch member (3) to approach the rotating transmission member (2) is also provided between the transmission shaft (1) and the clutch member (3). A clutch structure (5) is provided between the rotating transmission member (2) and the clutch member (3), which enables the two to approach each other for transmission when the torque between the two is less than a preset value, and enables the latter to separate from the former when the torque between the two is greater than the preset value.

2. The transmission assembly with a damping clutch structure according to claim 1, characterized in that: The clutch structure (5) comprises a plurality of protruding teeth (31) arranged on the clutch member (3) and protruding toward the rotating transmission member (2), and tooth grooves (21) provided on the rotating transmission member (2) and capable of receiving the protruding teeth (31) therein.

3. The transmission assembly with a damping clutch structure according to claim 2, characterized in that: The protruding teeth (31) and tooth grooves (21) extend radially and are evenly distributed circumferentially.

4. The transmission assembly with a damping clutch structure according to claim 2, characterized in that: The cross section of the convex tooth (31) is triangular or semicircular, and the cross section of the tooth groove (21) matches the convex tooth (31).

5. The transmission assembly with a damping clutch structure according to claim 1, characterized in that: The rotating transmission component (2) is a gear component, and its outer peripheral edge is provided with a gear tooth portion (22) for meshing with an external gear for transmission.

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

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

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

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

Images