Mounting structure of transmission assembly

Abstract

The utility model discloses a mounting structure of a transmission component, which comprises a shaft piece, the shaft piece is sequentially sleeved with a rotating piece, a clutch piece and an elastic element from bottom to top, the upper half part of the shaft piece is provided with a limiting convex ring used for being attached to the upper side of the elastic element, and the lower half part of the shaft piece is connected with a limiting plate used for preventing the rotating piece from being disengaged. A limiting structure for limiting the clutch piece to rotate relative to the shaft piece is arranged between the clutch piece and the shaft piece, and the elastic element is in a compressed state in an initial state, so that the elastic element can push the clutch piece to press the rotating piece. The mounting structure of the transmission assembly is convenient to mount and high in structural stability.

Description

Technical Field

[0001] This utility model specifically relates to an installation structure for a transmission component. 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 lighten the overall weight, existing transmission gears are mostly made of plastic materials. However, due to the compact structure of small motors and the small size of the transmission gears, although plastic gears have good shock absorption and noise reduction performance, their strength is relatively low, and they are prone to deformation or even breakage when subjected to large torques. Especially when the output shaft is subjected to abnormal resistance or sudden load changes, the torque at the motor output end increases sharply, which can easily damage the transmission gears, thereby affecting the normal operation of the entire transmission system and even causing equipment failure.

[0003] Therefore, this invention has developed a miniature transmission assembly with a clutch. This assembly includes a transmission gear and a transmission shaft. A clutch structure needs to be designed between the two to disconnect the transmission when the transmission shaft is subjected to significant resistance. However, the transmission gear can rotate relative to the transmission shaft, while the clutch needs to rotate with the transmission shaft. The overall structure of the assembly is extremely compact. How to install and fix each component and ensure that each component works stably has become a key problem that urgently needs to be solved.

[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 prior art and provide an installation structure for a transmission component that is easy to install and has strong structural stability.

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

[0007] This utility model provides an installation structure for a transmission component, including a shaft. The shaft is fitted with a rotating component, a clutch component, and an elastic element from bottom to top. The upper half of the shaft is provided with a limiting protrusion for abutting against the upper side of the elastic element. The lower half of the shaft is connected with a limiting plate for preventing the rotating component from disengaging. A limiting structure is provided between the clutch component and the shaft to restrict the rotation of the clutch component relative to the shaft. The elastic element is initially in a compressed state, thereby enabling the elastic element to push the clutch component against the rotating component.

[0008] As described above, in the installation structure of the transmission assembly, the limiting plate is provided with a first mounting hole for fitting onto the shaft, and the first mounting hole and the shaft are interference-fitted.

[0009] As described above, the installation structure of the transmission component includes an annular groove on the shaft and a first mounting hole on the limiting plate for fitting onto the shaft. The first mounting hole is designed to deform and engage with a deformation protrusion.

[0010] As described above, the installation structure of the transmission assembly includes a transmission shaft section located above the limiting convex ring, a first mounting shaft section located below the limiting convex ring, a second mounting shaft section located below the first mounting shaft section and with a smaller diameter than the first mounting shaft section, and a third mounting shaft section located below the second mounting shaft section and with a smaller diameter than the second mounting shaft section. The elastic element and clutch are sleeved on the first mounting shaft section, the rotating element is sleeved on the second mounting shaft section, and the limiting plate is connected to the third mounting shaft section.

[0011] In the transmission assembly mounting structure described above, the thickness of the elastic element in its natural state is d1, the thickness of the clutch is d2, the thickness of the rotating element is d3, the length of the first mounting shaft section is L1, and the length of the second mounting shaft section is L2. Then, L1 < d1 + d2, and L1 + L2 < d1 + d2 + d3.

[0012] As described above, in the installation structure of the transmission assembly, the clutch has protruding teeth facing the rotating component, and the rotating component has a toothed groove into which the protruding teeth can be inserted.

[0013] As described above, in the installation structure of the transmission assembly, the rotating member is provided with an annular boss that protrudes toward the clutch member and can surround the first mounting shaft section, and the tooth groove is formed on the annular boss.

[0014] As described above, the mounting structure of the transmission assembly includes a cutout on the first mounting shaft section, and the clutch is provided with a second mounting hole that matches the shape of the first mounting shaft section.

[0015] In the installation structure of the transmission assembly described above, the rotating component is a gear component, and its outer peripheral edge is provided with gear teeth for meshing and transmission with an external gear.

[0016] As described above, in the installation structure of the transmission assembly, the elastic element is a one-piece structure made of elastic plastic or rubber, or the elastic element is a spring, spring pad, or wave pad; the shaft is a one-piece structure made of metal; and the rotating part is a one-piece structure made of plastic, metal, or a plastic-metal composite.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. Compact structure and convenient installation, adapting to miniaturization requirements. All components are assembled using axial sleeve joints, with reliable fixation achieved through the use of limiting rings and limiting plates. The overall structure is highly integrated, suitable for small motor environments with limited space, and facilitates batch assembly and maintenance. The materials are rationally combined, balancing strength and lightweight. Shafts are made of metal to ensure strength, while rotating parts are made of plastic to reduce weight and noise. Combined with a flexible clutch control method, it meets high-performance transmission requirements while optimizing overall performance and cost.

[0019] 2. It has overload protection function, which improves transmission reliability. By setting elastic elements to push the clutch to press the rotating parts, the power transmission is automatically disconnected when the torque exceeds the set value, which effectively prevents the transmission components from being damaged due to overload and significantly improves the stability and service life of the system. Attached Figure Description

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

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

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

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

[0025] Figure 6 This is a cross-sectional schematic diagram of the installation structure of the transmission component according to Embodiment 3 of this utility model. Detailed Implementation

[0026] The utility model will be further described below with reference to the accompanying drawings:

[0027] 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.

[0028] Example 1

[0029] This embodiment describes an installation structure for a transmission component. For example... Figures 1 to 4 As shown, the mounting structure includes a shaft 1, and the shaft 1 is fitted with a rotating component 2, a clutch component 3 and an elastic element 4 from bottom to top.

[0030] The upper part of the shaft 1 is provided with a limiting protrusion 11 for abutting against the upper side of the elastic element 4, and the lower part of the shaft 1 is connected to a limiting plate 5, which is used to prevent the rotating part 2 from disengaging. A limiting structure is provided between the clutch 3 and the shaft 1 to limit the rotation of the clutch 3 relative to the shaft 1. The elastic element 4 is in a compressed state in the initial state, thereby pushing the clutch 3 against the rotating part 2, so that the two are in close contact. The rotating part 2 can rotate freely relative to the shaft 1.

[0031] Specifically, the limiting plate 5 is provided with a first mounting hole 50, which is fixed to the shaft 1 by an interference fit. The shaft 1 includes multiple shaft segments of different diameters: a transmission shaft segment 13 located above the limiting protrusion ring 11, a first mounting shaft segment 14 located below the limiting protrusion ring 11, a second mounting shaft segment 15 located below the first mounting shaft segment 14 and with a smaller diameter, and a third mounting shaft segment 16 located below the second mounting shaft segment 15 and with an even smaller diameter.

[0032] The elastic element 4 and the clutch 3 are sleeved on the first mounting shaft section 14, the rotating component 2 is sleeved on the second mounting shaft section 15, and the limiting plate 5 is connected to the third mounting shaft section 16. Through this structural design, during assembly, the elastic element 4, clutch 3, and rotating component 2 only need to be sequentially sleeved onto the shaft 1 and connected to the limiting plate 5 to complete the assembly. Simultaneously, the elastic element 4 is compressed, confining each component between the limiting plate 5 and the limiting protrusion 11. This structure has advantages such as compactness, convenient installation, and stable operation.

[0033] It should be noted that the connection between the limiting plate 5 and the shaft 1 is not limited to an interference fit; bonding, welding, or other methods can also be used for fixation. Furthermore, the shaft 1 may not have multiple shaft segments, but only one shaft segment to meet installation requirements.

[0034] Furthermore, the clutch 3 has a protruding tooth 31 on the side facing the rotating member 2, and the rotating member 2 has a tooth groove 21 that matches the protruding tooth 31. The cross-sectional shape of the protruding tooth 31 can be triangular or semi-circular, and the shape of the tooth groove 21 corresponds to it; in other embodiments, trapezoidal, rounded rectangle, or other adaptable shapes can also be used. Of course, the design of the protruding tooth 31 and tooth groove 21 can also be omitted, and the clutch 3 can be made of a material with a high coefficient of friction (such as rubber), and the frictional connection between it and the rotating member 2 can be achieved by the preload provided by the elastic element 4.

[0035] In this embodiment, the rotating member 2 is a gear member, and its outer peripheral edge is provided with gear teeth 23, which can be used to mesh with other gears or gear sets to achieve power transmission. However, the form of the rotating member 2 is not limited to this, and alternative structures such as belt pulleys, ratchets or swing arms can also be used.

[0036] During actual operation, when the rotating member 2 rotates, under the action of the elastic element 4, the clutch member 3 always abuts against the surface of the rotating member 2. Therefore, the rotating member 2 can drive the clutch member 3 to rotate synchronously, and then drive the shaft member 1 to rotate. When the shaft member 1 is subjected to a large resistance resulting in the torque exceeding the set value, the torque between the rotating member 2 and the clutch member 3 will overcome the thrust of the elastic element 4, causing the clutch member 3 to disengage from the rotating member 2 and compress the elastic element 4, thereby cutting off the power transmission path and playing an overload protection role for the rotating member 2.

[0037] Among them, the "set value" is the minimum torque value required for the clutch member 3 to overcome the pressure of the elastic element 4, which 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 rotating member 2 can withstand.

[0038] Preferably, the limiting structure includes a notch 141 formed in the first mounting shaft section 14, and the clutch member 3 is provided with a second fitting hole 30 that matches the shape of the first mounting shaft section 14, so as to ensure the synchronous rotation between the clutch member 3 and the shaft member 1.

[0039] Further, let the thickness of the elastic element 4 in the natural state be d1, the thickness of the clutch member 3 be d2, the thickness of the rotating member 2 be d3, the length of the first mounting shaft section 14 be L1, and the length of the second mounting shaft section 15 be L2. Then the following relationships should be satisfied:

[0040] 1. L1 < d1 + d2, to ensure that the clutch member 3 is always located on the first mounting shaft section 14, so as to achieve limiting and rotation with the shaft member 1;

[0041] 2. L1 + L2 < d1 + d2 + d3, to ensure that the limiting plate 5 can press against the rotating member 2 to compress the elastic element 4.

[0042] As a further preferred solution, as Figure 3 and Figure 4 shown, the rotating member 2 is provided with an annular boss 22 extending towards the clutch member 3, and the tooth groove 21 is formed on the annular boss 22. This not only improves the smooth operation of the rotating member 2, but also ensures good contact between the rotating member 2 and the clutch member 3, and at the same time ensures that the clutch member 3 is always located on the first mounting shaft section 14.

[0043] In addition, as Figures 2 to 4As shown, the elastic element 4 is made of elastic plastic or rubber, has a trumpet-shaped structure, and gradually expands from the second limiting part 12 towards the clutch 3. This structure provides 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 shaft 1 is preferably made of metal to ensure strength; the rotating part 2 is preferably made of plastic to balance lightweight and cost control. Alternatively, the rotating part 2 can also be made of metal or a composite of plastic and metal.

[0044] Example 2

[0045] This embodiment introduces an installation structure for a transmission component, which differs from Embodiment 1 in the connection method between the limiting plate 5 and the shaft 1.

[0046] like Figure 5 and Figure 6 As shown, in this embodiment, the third mounting shaft segment 16 of the shaft member 1 is provided with an annular groove 12. The limiting plate 5 is provided with a first mounting hole 50, and the first mounting hole 50 is provided with a deformable protrusion 51 that can deform. The limiting plate 5 is preferably a thin metal sheet structure so that the deformable protrusion 51 can generate a certain elastic deformation during the installation process, thereby smoothly engaging into the annular groove 12 and realizing a reliable connection between the limiting plate 5 and the shaft member 1.

[0047] This structure simplifies the assembly process, improves the connection stability between the limiting plate 5 and the shaft 1, and facilitates disassembly and maintenance.

[0048] 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. An installation structure for a transmission component, characterized in that: It also includes a shaft (1), which is fitted with a rotating part (2), a clutch part (3) and an elastic element (4) from bottom to top. The upper half of the shaft (1) is provided with a limiting protrusion (11) for abutting against the upper side of the elastic element (4). The lower half of the shaft (1) is connected with a limiting plate (5) for preventing the rotating part (2) from coming out. The clutch part (3) and the shaft (1) are provided with a limiting structure to restrict the rotation of the clutch part (3) relative to the shaft (1). The elastic element (4) is initially in a compressed state, which allows the elastic element (4) to push the clutch part (3) against the rotating part (2).

2. The mounting structure of the transmission assembly according to claim 1, characterized in that: The limiting plate (5) is provided with a first mounting hole (50) for sleeved on the shaft (1), and the first mounting hole (50) and the shaft (1) are interference fit.

3. The mounting structure of the transmission assembly according to claim 1, characterized in that: The shaft (1) is provided with an annular groove (12), and the limiting plate (5) is provided with a first assembly hole (50) for fitting onto the shaft (1). The first assembly hole (50) is provided with a deformation-generating feature and is used to engage with the deformation protrusion (51).

4. The mounting structure of the transmission assembly according to any one of claims 1-3, characterized in that: The shaft (1) includes a transmission shaft section (13) located on the upper side of the limiting protrusion (11), a first mounting shaft section (14) located on the lower side of the limiting protrusion (11), a second mounting shaft section (15) located on the lower side of the first mounting shaft section (14) and with a smaller diameter than the first mounting shaft section (14), and a third mounting shaft section (16) located on the lower side of the second mounting shaft section (15) and with a smaller diameter than the second mounting shaft section (15). The elastic element (4) and the clutch (3) are sleeved on the first mounting shaft section (14), the rotating element (2) is sleeved on the second mounting shaft section (15), and the limiting plate (5) is connected to the third mounting shaft section (16).

5. The mounting structure of the transmission assembly according to claim 4, characterized in that: The thickness of the elastic element (4) in its natural state is d1, the thickness of the clutch (3) is d2, the thickness of the rotating element (2) is d3, the length of the first mounting shaft section (14) is L1, and the length of the second mounting shaft section (15) is L2. Then L1 < d1 + d2, L1 + L2 < d1 + d2 + d3.

6. The mounting structure of the transmission assembly according to claim 4, characterized in that: The clutch (3) has protruding teeth (31) that protrude toward the rotating part (2), and the rotating part (2) has a tooth groove (21) that allows the protruding teeth (31) to be inserted.

7. The mounting structure of the transmission assembly according to claim 6, characterized in that: The rotating member (2) is provided with an annular boss (22) that protrudes toward the clutch member (3) and can surround the first mounting shaft section (14), and the tooth groove (21) is formed on the annular boss (22).

8. The mounting structure of the transmission assembly according to any one of claims 1-3, characterized in that: The limiting structure includes a cutout (141) on the first mounting shaft section (14), and the clutch (3) is provided with a second mounting hole (30) that matches the shape of the first mounting shaft section (14).

9. The mounting structure of the transmission assembly according to any one of claims 1-3, characterized in that: The rotating component (2) is a gear component, and its outer peripheral edge is provided with gear teeth (23) for meshing and transmission with an external gear.

10. The mounting structure of the transmission assembly according to any one of claims 1-3, 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. The shaft (1) is an integral structure made of metal. The rotating part (2) is an integral structure made of plastic, metal or plastic-metal composite.

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