Crescent bearing with swing arm

Abstract

The utility model discloses a crescent moon bearing with swing arm, including the clamp and the outer ring, the outer ring presents the arc shape setting, is provided with the hoop groove on the outer circumferential wall of outer ring, the clamp is set in the hoop groove, is provided with the roller groove on the outer ring, the roller groove is rotationally coupled with the rolling body, still is connected with the swing arm on the outer circumferential wall of outer ring, the swing arm end is provided with the pin hole. Its simple structure, stable operation, reduce the quantity of parts, convenient assembly has good use effect.

Description

Technical Field

[0001] This utility model relates to a crescent bearing with a rocker arm. Background Technology

[0002] In applications such as engine valve drives and precision oscillating transmissions, conventional crescent bearings serve only as independent friction-reducing support components. Lacking circumferential limiting and guiding structures, they must be assembled into a dedicated guide groove within the equipment housing to achieve motion constraint and positioning. This approach demands high precision in the housing guide groove machining, increasing both the cost of the supporting components and the complexity of the assembly and adjustment processes. Furthermore, the clearance can easily lead to lateral bearing movement, resulting in problems such as jamming and uneven wear after long-term operation. Traditional crescent bearings only provide basic support and guidance functions and lack the ability to convert motion modes. In eccentrically driven reciprocating oscillation conditions, they require additional independent rocker arm components. The split structure results in a large number of parts and high assembly complexity. Accumulated errors in the fit weaken the oscillation accuracy and structural rigidity, and the overall space occupation is large, making it difficult to adapt to the trend of equipment integration and miniaturization. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a crescent bearing with a rocker arm, which has a simple structure, stable operation, reduced number of parts, convenient assembly, and good performance.

[0004] To achieve the above objectives, this utility model provides a crescent bearing with a swing arm, including a clamp and an outer ring. The outer ring is arc-shaped, and a groove is provided on the outer peripheral wall of the outer ring. The clamp is engaged in the groove. A roller groove is provided on the outer ring, and a rolling element is rotatably fitted in the roller groove. A swing arm is also connected to the outer peripheral wall of the outer ring, and a pin hole is provided at the end of the swing arm.

[0005] The advantages of this design are as follows: The arc-shaped outer ring, clamp, rolling elements, and integrated swing arm are combined into a single component. The outer ring's circumferential groove, combined with the clamp, provides circumferential limiting constraints, eliminating the need for machining dedicated guide grooves on the equipment housing. This significantly reduces the housing's machining precision requirements and cuts down on the processing costs associated with mold making and milling. Simultaneously, it completely eliminates the lateral movement and jamming problems caused by the clearance in traditional split bearings. The integrated swing arm with pin holes abandons the traditional separate assembly mode of bearings and swing arms, reducing the number of independent parts, avoiding accumulated errors from multi-part assembly, and effectively improving the swing arm's reciprocating oscillation accuracy and overall structural rigidity. The rolling elements within the roller groove retain the low-friction support function of the crescent bearing, converting the continuous rotational motion of the eccentric roller into the periodic oscillation of the swing arm, achieving motion transformation. The integrated structure significantly reduces the assembly space required, meeting the miniaturization and integration needs of engine valve mechanisms. The pin holes at the swing arm end allow for quick connection to external transmission components, simplifying the assembly process and significantly improving the overall transmission stability and service life.

[0006] As a further feature of this invention, a receiving groove is provided on the end face of the swing arm, and a snap-fit ​​groove is provided on both sides of the receiving groove. A support rod is fitted in the receiving groove, and a limiting arm is provided at the end of the support rod for snapping into the snap-fit ​​groove.

[0007] The beneficial effects of this design are as follows: the interlocking of the limiting arm and the locking groove forms a limiting structure, which can firmly fix the position of the support rod. Under high-speed reciprocating swing conditions of the swing arm, there will be no slippage or displacement of the support rod, ensuring long-term stable positioning of the support structure. The support rod can provide auxiliary force support for the swing arm, and can be moved out for support and positioning when needed. Simultaneously, it can disperse the impact load borne by the swing arm during transmission, reducing the risk of bending and deformation of the swing arm and strengthening the overall structural load-bearing strength. The modular locking design allows for individual disassembly and assembly of the support rod. Later maintenance does not require disassembling the entire crescent bearing set; only the damaged support rod needs to be replaced to restore equipment performance, reducing maintenance difficulty. It is suitable for the high-intensity working environment of long-term high-frequency reciprocating swing of the engine, effectively extending the service life of the entire transmission mechanism.

[0008] As a further feature of this invention, a support arm is provided at the other end of the support rod, and a rubber pad is wrapped around the outer peripheral wall of the support arm.

[0009] The advantages of this design are as follows: The integrated support arm at the end of the support rod increases the contact area with the connecting transmission components, evenly distributing contact stress and preventing localized pressure concentration that could cause indentations or damage to parts. The support arm is covered with a rubber pad, which absorbs the impact load generated by the swing arm's movement using the elastic buffering properties of rubber, mitigating rigid collisions between metal parts, significantly reducing engine vibration and mechanical noise, and optimizing the equipment's NVH performance. The rubber pad isolates the metal contact surfaces from direct friction, reducing wear and tear on the support arm and its components, and extending the replacement cycle of parts. The integrated rubber coating process is simple and inexpensive; the rubber pad can be replaced individually after aging and wear, eliminating the need to replace the support rod itself, thus reducing future maintenance costs. Simultaneously, the rubber material has anti-slip properties, preventing the support arm from slipping and shifting under stress, ensuring stable transmission precision and adapting to the continuous reciprocating working conditions of the valve mechanism.

[0010] As a further feature of this invention, the rolling element is mounted in the roller groove by a retainer, and the retainer is engaged with the roller groove.

[0011] The advantages of this design are as follows: The snap-fit ​​cage uniformly houses and limits all rolling elements, allowing them to be pre-assembled into a single component. During assembly, they can be inserted into the outer ring roller grooves all at once, significantly reducing assembly time in mass production and improving bearing mass production efficiency. The cage separates the rolling elements, eliminating direct contact and friction, reducing wear and tear, lowering internal bearing frictional resistance, resulting in smoother transmission and less performance degradation due to frictional heat. The snap-fit ​​structure restricts radial and axial displacement of the cage, ensuring uniform rolling element arrangement without stacking or misalignment during operation, resulting in balanced bearing stress distribution and preventing raceway damage caused by localized overload.

[0012] As a further feature of this invention, the roller groove sidewall is also provided with a notch for disassembling the retainer.

[0013] The advantages of this design are as follows: A dedicated disassembly notch is created on the side wall of the roller groove, providing operating space for maintenance tools. Workers can use conventional tools such as pry bars and screwdrivers to reach into the notch and pry the cage, eliminating the need for destructive disassembly methods such as forceful hammering or prying. Disassembly is simple and labor-saving. The notch is only partially created, without damaging the complete arc-shaped working surface of the roller groove, and does not interfere with the rolling element's trajectory, having no negative impact on the bearing's load-bearing and friction-reducing core performance. This structure avoids the drawbacks of traditional structures without a disassembly notch, which easily scratch the outer raceway and damage the rolling elements during disassembly, reducing bearing scrap during maintenance and lowering maintenance material costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model; Figure 2This is a structural schematic diagram of the support arm in the retracted state according to the second embodiment of this utility model; Figure 3 This is a structural schematic diagram of the support arm in the open state according to the second embodiment of this utility model. Detailed Implementation

[0015] The first embodiment of this utility model, a crescent bearing with a rocker arm, is as follows: Figure 1 As shown: It includes a clamp 1 and an outer ring 2. The outer ring 2 is arc-shaped. A groove is provided on the outer peripheral wall of the outer ring 2. The clamp 1 is engaged in the groove. A roller groove is provided on the outer ring 2. A rolling element 3 is rotatably engaged in the roller groove. A swing arm 5 is also connected to the outer peripheral wall of the outer ring 2. A pin hole is provided at the end of the swing arm 5.

[0016] As a further feature of this embodiment, the rolling element 3 is mounted in the roller groove by a retainer 4, and the retainer 4 is engaged with the roller groove.

[0017] As a further feature of this embodiment, the roller groove sidewall is also provided with a notch 11 for disassembling the retainer 4.

[0018] A second embodiment of the crescent bearing with a rocker arm of this utility model is, for example... Figure 2 and Figure 3 As shown: It includes a clamp 1 and an outer ring 2. The outer ring 2 is arc-shaped. A groove is provided on the outer peripheral wall of the outer ring 2. The clamp 1 is engaged in the groove. A roller groove is provided on the outer ring 2. A rolling element 3 is rotatably engaged in the roller groove. A swing arm 5 is also connected to the outer peripheral wall of the outer ring 2. A pin hole is provided at the end of the swing arm 5.

[0019] As a further feature of this embodiment, a receiving groove 51 is provided on the end face of the swing arm 5, and a snap-fit ​​groove 52 is provided on both sides of the receiving groove 51. A support rod 6 is fitted in the receiving groove 51, and a limiting arm 61 for snapping into the snap-fit ​​groove 52 is provided at the end of the support rod 6.

[0020] As a further feature of this embodiment, a support arm 62 is provided at the other end of the support rod 6, and a rubber pad is wrapped around the outer peripheral wall of the support arm 62.

[0021] As a further feature of this embodiment, the rolling element 3 is mounted in the roller groove by a retainer 4, and the retainer 4 is engaged with the roller groove.

[0022] As a further feature of this embodiment, the roller groove sidewall is also provided with a notch 11 for disassembling the retainer 4.

[0023] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A crescent-shaped bearing with a swing arm, comprising a clamp and an outer ring, the outer ring being arc-shaped, a groove being provided on the outer peripheral wall of the outer ring, the clamp being engaged in the groove, characterized in that: The outer ring is provided with a roller groove, in which a rolling element is rotatably engaged. A rocker arm is also connected to the outer peripheral wall of the outer ring, and a pin hole is provided at the end of the rocker arm.

2. The crescent bearing with a rocker arm according to claim 1, characterized in that: The swing arm end face is also provided with a receiving groove, and the receiving groove is provided with a snap-fit ​​groove on both sides. A support rod is fitted in the receiving groove, and the end of the support rod is provided with a limiting arm for snapping with the snap-fit ​​groove.

3. The crescent bearing with a rocker arm according to claim 2, characterized in that: The other end of the support rod is provided with a support arm, and the outer peripheral wall of the support arm is wrapped with a rubber pad.

4. The crescent bearing with a rocker arm according to claim 1, characterized in that: The rolling element is mounted in the roller groove by a cage, and the cage is engaged with the roller groove.

5. The crescent bearing with a rocker arm according to claim 4, characterized in that: The roller groove sidewall is also provided with a notch for disassembling the cage.

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