Clutch friction plate for loading machine

Abstract

The utility model provides a clutch friction plate for a loading machine, and relates to the technical field of spare and accessory parts of the loading machine. The clutch friction plate for the loading machine comprises a core plate and a lining layer, a first spline is arranged inside the core plate, and a second spline is arranged outside the core plate; oil grooves are formed in the lining layer and comprise the annular oil grooves and the fan-shaped oil grooves, the annular oil grooves are distributed in the circumferential direction, and the fan-shaped oil grooves are distributed in the radial direction. And the tail part of the fan-shaped oil groove is closed and forms a fillet. According to the clutch friction plate for the loading machine, the performance of the friction plate is improved, and the stability and the reliability of a whole clutch system are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of loader parts, in particular to a clutch friction plate for a loader. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] Loaders are a type of heavy engineering equipment widely used in construction, mining, and port operations. They primarily consist of an engine, transmission system, working mechanism, and traveling gear. The loader's working mechanism, consisting of a boom, arm, and bucket, is controlled by a hydraulic system and enables operations such as excavation, loading, transporting, and unloading. Due to their high efficiency and adaptability, loaders play a vital role in various earthwork projects.

[0004] Friction plates play a crucial role in transmitting torque within a clutch. Prior art friction plates typically feature oil grooves on one or both sides of the core plate for lubrication and cooling. In invention patent CN201110327647.1, "A Friction Plate," the oil grooves are semicircular blind holes, with the through holes arranged in one or more rows of concentric circles around the core plate. In utility model patent CN202221344462.1, "Second-gear active friction plate for a loader," arc-shaped oil grooves are located on the outer surfaces of both friction plates.

[0005] The inventors discovered that the existing oil groove configuration, while preventing excessive heat from sintering the friction plate during sliding and enabling better engagement and disengagement, can cause: 1. uneven or insufficient oil in some locations of the semicircular blind hole oil groove, leading to tearing of the oil film and dry grinding, which produces an unusual noise; 2. vacuum formation in some locations prevents smooth disengagement; 3. the open tail of the arc-shaped oil groove throws all the oil out of the friction plate, easily tearing the oil film and causing localized pitting, which reduces the overall lifespan. Utility Model Content

[0006] In order to address the deficiencies of the prior art, the present disclosure provides a clutch friction plate for a loader. By improving the structure of the oil groove on the lining, the oil groove is designed as an annular oil groove and a fan-shaped oil groove. The tail of the fan-shaped oil groove is closed and rounded, thereby improving the performance of the friction plate and further enhancing the stability and reliability of the entire clutch system.

[0007] A clutch friction plate for a loader comprises a core plate and a lining layer; a first spline is provided inside the core plate, and a second spline is provided outside the core plate; an oil groove is provided on the lining layer, and the oil groove comprises an annular oil groove and a fan-shaped oil groove, wherein the annular oil groove is arranged circumferentially and the fan-shaped oil groove is arranged radially.

[0008] Furthermore, the tail of the fan-shaped oil groove is closed and has a rounded corner.

[0009] Furthermore, there are any one or more annular oil grooves arranged circumferentially.

[0010] Furthermore, there are three annular oil grooves arranged circumferentially.

[0011] Furthermore, there are any 2N sector-shaped oil grooves arranged radially, where N is a positive integer.

[0012] Furthermore, there are 120 fan-shaped oil grooves arranged radially.

[0013] Furthermore, the core plate is obtained by heat treatment of any one or more of the following materials: 45 steel, 60 steel, and 65 manganese steel.

[0014] Furthermore, the lining is sintered from copper material and has wear resistance.

[0015] Furthermore, oil grooves are provided on both sides of the lining, and the oil grooves on both sides can be designed into different shapes, including circumferentially arranged annular oil grooves, wavy oil grooves, double arc oil grooves and radially arranged fan-shaped oil grooves.

[0016] Furthermore, both sides of the liner are designed to have circumferentially arranged annular oil grooves and radially arranged fan-shaped oil grooves.

[0017] Compared with the prior art, the clutch friction plate for a loader provided by the present invention has the following beneficial effects by making targeted improvements to the oil groove structure design:

[0018] 1. The lining disclosed in this application is designed with circumferentially arranged annular oil grooves and radially arranged fan-shaped oil grooves on both sides to achieve uniform distribution of oil and ensure sufficient lubrication of the friction plate surface. The optimized lubrication system avoids abnormal noise at the moment of friction plate engagement, improves the driving experience, and ensures the smoothness of the power transmission process.

[0019] 2. The tail of the fan-shaped oil tank disclosed in this application is closed and has rounded corners, which reduces turbulence and impact during oil flow, and solves the problem that the oil at the tail of the open oil tank will be thrown out of the friction plate, tearing the oil film and causing local pitting corrosion, thereby reducing wear on the friction plate and extending the service life.

[0020] 3. This application comprehensively considers the size and specifications of the loader friction plate, and arranges three annular oil grooves circumferentially on both sides of the lining, and 120 fan-shaped oil grooves radially. This technical solution can ensure that when the friction plate rotates, the oil can be evenly distributed on the entire circumferential surface of the friction plate, and ensure that the oil can diffuse evenly from the center of the friction plate to the periphery, ensuring that the lubrication needs of each radial point of the friction plate are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present disclosure, are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure.

[0022] Figure 1 This is a schematic structural diagram of the clutch friction plate for a loader disclosed in the utility model;

[0023] Figure 2 This is an oblique view of the clutch friction plate for a loader disclosed in the utility model;

[0024] Figure 3 This is a side view of the clutch friction plate for a loader disclosed in the utility model;

[0025] Figure 4 for Figure 1 Schematic diagram of the structure enlarged at point A in the middle.

[0026] In the figure: 1, core plate; 2, lining; 1a, first spline; 1b, second spline; 2a, annular oil groove; 2b, fan-shaped oil groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] See also Figures 1 to 4 The utility model provides a clutch friction plate for a loader, including a core plate and a lining; a first spline is provided inside the core plate, and a second spline is provided outside the core plate, which can operate according to the specific power input and can be used as an active or passive plate; an oil groove is provided on the lining, and the oil groove includes an annular oil groove and a fan-shaped oil groove.

[0029] The tail of the fan-shaped oil groove is closed and has a rounded corner. The annular oil groove can evenly drain the oil to all parts of the friction plate in the circumferential direction during the high-speed rotation of the friction plate. The fan-shaped oil groove can evenly drain the oil in the radial direction, and the tail is sealed and smoothly transitioned, which can retain some oil for better lubrication, ensuring that the friction plate is always fully lubricated, and the layout on both sides is the same.

[0030] There are one or more annular oil grooves arranged circumferentially; in a specific embodiment, there are three annular oil grooves arranged circumferentially.

[0031] There are any 2N sector-shaped oil grooves arranged radially, where N is a positive integer. In a specific embodiment, N is 60, and there are 120 sector-shaped oil grooves arranged radially.

[0032] Taking into account the size and specifications of the loader's friction plates, three annular oil grooves are arranged circumferentially to ensure that the oil is evenly distributed across the entire circumference of the friction plate as it rotates. This makes the oil distribution more uniform, thereby improving lubrication efficiency and reducing localized wear caused by uneven lubrication.

[0033] When 120 sector-shaped oil grooves are arranged radially, the oil is evenly distributed from the center of the friction plate toward the periphery, ensuring that the lubrication needs of all radial points on the friction plate are met. This design is particularly well-suited to the high-speed and high-load operating environments of loaders, effectively preventing heat buildup and wear caused by insufficient lubrication.

[0034] The core plate is obtained by heat treatment of any one or more of the following materials: 45 steel, 60 steel, 65 manganese steel.

[0035] The lining is made of sintered copper material and is wear-resistant.

[0036] Oil grooves are provided on both sides of the liner. The oil grooves on both sides can be designed in different shapes, including circumferentially arranged annular oil grooves, wavy oil grooves, double arc oil grooves and radially arranged fan-shaped oil grooves.

[0037] In a specific embodiment, both sides of the liner are designed to have circumferentially arranged annular oil grooves and radially arranged fan-shaped oil grooves.

[0038] Different oil groove structures determine their performance differences. Smooth plate friction plates without grooves have a lower friction coefficient because the oil cannot be quickly drained from the friction pair gap. Compared with grooved plates, they have weaker heat dissipation and higher wear.

[0039] The radial oil groove design radiates radially from the friction disc's central axis. Centrifugal force accelerates the oil flow to the mating surfaces, ensuring even and consistent lubricant distribution. This effectively dissipates heat during the dynamic clutch engagement phase, protecting the system's operating efficiency and durability. This enhances the clutch's friction characteristics, making it invaluable in situations requiring smooth acceleration and precise shifting.

[0040] Circumferential oil grooves are designed to distribute the oil evenly across the friction plate's surface. This design allows the oil to flow circumferentially as the friction plate rotates, ensuring lubricant covers the entire surface, thereby reducing localized wear caused by uneven lubrication. Under high speed and load conditions, the circumferential oil grooves effectively distribute the oil evenly from the center of the friction plate to the periphery, which is crucial for maintaining lubrication. Since the friction plate generates significant heat during operation, the circumferential oil grooves help dissipate this heat promptly, preventing heat accumulation and thus extending the service life of the friction plate.

[0041] The present utility model was designed with full consideration given to the working environment in which loaders are used in daily life, including construction sites, mines, and port loading and unloading. The main tasks undertaken by loaders in these scenarios include heavy engineering operations such as excavation, loading, transporting, and unloading. Due to the nature of these tasks, the friction plates of the loader need to perform braking actions frequently during operation. In order to ensure that the groove design of the friction plate can be consistent with the operating speed of the clutch, thereby achieving the best braking effect, the present utility model has made special design optimizations on both sides of the friction plate lining. Specifically, the oil grooves on both sides of the lining are preferably designed as annular oil grooves and fan-shaped oil grooves. Such a design can not only improve the heat dissipation efficiency of the friction plate, but also ensure that the friction plate can maintain a good working condition under frequent braking conditions, extending its service life, while also improving the operating efficiency and safety of the entire loader.

[0042] In summary, the present invention achieves more efficient lubrication and heat dissipation by optimizing the design of the friction plate. First, the design of the internal and external splines of the friction plate allows the friction plate to be flexibly used as a driven or active transmission component. This not only improves the applicability of the component but also reduces production costs, as the same component can be adapted for different mechanical configurations. Second, the circular ring and fan-shaped oil groove design on both sides of the friction plate ensure that the oil is evenly distributed on the friction plate surface, thereby avoiding dry grinding and localized pitting caused by uneven oil distribution. In addition, the rounded transition design of the tail oil groove reduces turbulence and impact during oil flow, further improving the lubrication effect and extending the service life of the friction plate.

[0043] Working principle:

[0044] The friction plate works in conjunction with a steel plate or other gear assembly, slowly coming into contact with the steel plate during operation, transmitting power through friction. Separation interrupts power transmission. Specifically, during power transmission, the friction plate is connected to the power input or output shaft via its internal and external splines, acting as either a master or slave component, as required. When the friction plate contacts the steel plate, torque is transmitted through friction. The oil groove design ensures a uniform oil film on the friction plate surface, reducing friction and heat generation. The rounded corner transitions and closed tail of the oil groove facilitate smooth oil flow across the friction plate surface, preventing oil film tearing and dry wear, thereby extending the service life of the friction plate and improving overall system performance. Furthermore, different oil groove shapes, such as wavy or double arcs, can be optimized for optimal lubrication based on specific application requirements. Through these designs, the present invention ensures that the friction plate maintains optimal operating condition under various operating conditions, thereby enhancing the stability and reliability of the entire power transmission system.

[0045] In the description of this specification, the terms "connect", "install", "fix", "set", etc. are understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. As in this example, for ordinary technicians in this field, the specific meanings of the above terms in this utility model or utility model can be understood according to specific circumstances.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clutch friction plate for a loader, characterized by: It includes a core plate and a lining layer; a first spline is provided inside the core plate and a second spline is provided outside the core plate; an oil groove is provided on the lining layer, and the oil groove includes an annular oil groove and a fan-shaped oil groove, the annular oil groove is arranged circumferentially and the fan-shaped oil groove is arranged radially.

2. The clutch friction plate for a loader according to claim 1, characterized in that: The tail of the fan-shaped oil groove is closed and has a rounded corner.

3. The clutch friction plate for a loader according to claim 1, characterized in that: The annular oil grooves may be arranged in any one or more manners in the circumferential direction.

4. The clutch friction plate for a loader according to claim 3, characterized in that: There are three annular oil grooves arranged circumferentially.

5. The clutch friction plate for a loader according to claim 1, characterized in that: There are any 2N sector-shaped oil grooves arranged radially, where N is a positive integer.

6. The clutch friction plate for a loader according to claim 5, characterized in that: There are 120 fan-shaped oil grooves arranged radially.

7. The clutch friction plate for a loader according to claim 1, characterized in that: The lining is formed by sintering copper material and has wear resistance.

8. The clutch friction plate for a loader according to claim 1, wherein: Oil grooves are provided on both sides of the lining, and the oil grooves on both sides can be designed into different shapes, including circumferentially arranged annular oil grooves, wavy oil grooves, double arc oil grooves and radially arranged fan-shaped oil grooves.

9. The clutch friction plate for a loader according to claim 8, characterized in that: Both sides of the lining are designed to have circumferentially arranged annular oil grooves and radially arranged fan-shaped oil grooves.

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