Cross coupling sliding block driving structure suitable for high rotating speed

Abstract

The invention provides a high-rotating-speed cross coupling sliding block driving structure which comprises a crankshaft driving shaft head, a flexible cross coupling sliding block and an oil pump load shaft head, the crankshaft driving shaft head, the flexible cross coupling sliding block and the oil pump load shaft head are connected in sequence, the flexible cross coupling sliding block is sleeved with a transmission wheel, and the flexible cross coupling sliding block is sleeved with an oil pump. The flexible cross coupling sliding block and the outer side of the oil pump load shaft head are further sleeved with a transmission plate. The flexible cross coupling has the beneficial effects that reliable connection between the driving shaft and the load shaft is achieved by compensating radial, axial and angular displacement through structures such as flexible cross coupling sliding block aligning, tongue-and-groove clearance and hydraulic damping. An accessory driving coupling structure integrated at the crankshaft end can be achieved, the limitation that a traditional cross sliding block is generally suitable for low-rotating-speed application scenes is broken through, and the high-rotating-speed driving structure of a high-power-to-weight-ratio engine can be achieved to be compact and light. The method can be widely applied to design of engine driving systems of various diesel engines, gasoline engines and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engine design, and particularly relates to a cross-coupling sliding block driving structure suitable for high-speed. BACKGROUND

[0002] With the continuous improvement of the industrialization degree in China, the power device develops towards the trend of light weight and miniaturization, the weight and volume of the engine are more and more limited, and the compact integrated design is widely applied in the engine part design, and the development of the high power-to-weight ratio of the aero-engine further promotes the development process of the light weight transmission structure.

[0003] In the currently developed high power-to-weight ratio diesel engine, under the condition of the compact integrated design of the diesel engine coupling driving, the engine internal space is small, the design difficulty of the coupling driving structure of the crankshaft and the accessory is large, the coaxiality of the machining and assembly of the crankshaft and the accessory load shaft is poor, the coupling driving structure bears abnormally, and the coupling structure is broken. SUMMARY

[0004] Therefore, the application aims to provide a cross-coupling sliding block driving structure suitable for high speed, so as to solve the problems in the prior art and meet the user's demand for the coupling structure design of the high power-to-weight ratio engine.

[0005] To achieve the above-mentioned purpose, the technical scheme of the application is as follows: A cross-coupling sliding block driving structure suitable for high speed, comprising a crankshaft driving shaft head, a flexible cross-coupling sliding block and an oil pump load shaft head, the crankshaft driving shaft head, the flexible cross-coupling sliding block and the oil pump load shaft head are connected in sequence, the flexible cross-coupling sliding block is sleeved with a transmission wheel outside, and a transmission plate is further sleeved outside the flexible cross-coupling sliding block and the oil pump load shaft head.

[0006] Further, the material of the flexible cross-coupling sliding block is alloy steel material, the surface strengthening treatment hardness and the crankshaft head hardness are less than 5 HRC.

[0007] Further, the flexible cross-coupling sliding block is in the shape of a long cylinder, and a necked structure is adopted at the middle shaft neck of the long cylinder.

[0008] Further, the tenon and groove gap value between the crankshaft driving shaft head and the flexible cross-coupling sliding block is 0.1-0.2 mm.

[0009] Further, the tenon and groove gap value between the flexible cross-coupling sliding block and the oil pump load shaft head is 0.1-0.2 mm.

[0010] Further, the hollow oil inlet hole structure is arranged in the middle rod part of the flexible cross-coupling sliding block.

[0011] Further, the hollow hole of the transmission wheel contains the left end of the flexible cross-coupling sliding block with a radial gap of 0.2-0.3mm.

[0012] Further, the flexible cross-coupling sliding block right end is contained by the oil pump of the transmission plate with a radial gap of 0.2-0.3mm.

[0013] Further, the oil inlet hole structure is arranged on the oil pump load shaft head.

[0014] Compared with the prior art, the cross-coupling sliding block driving structure suitable for high-speed rotation has the following advantages: The cross-coupling sliding block driving structure suitable for high-speed rotation, the flexible cross-coupling sliding block is used to compensate the radial, axial and angular displacement to realize the reliable connection between the driving shaft and the load shaft. The crankshaft shaft end integrated accessory driving coupling structure can be realized, which breaks through the limitation of the traditional cross-coupling sliding block generally suitable for low-speed (most ≤300r / min) application scenarios, and is beneficial to realize the compact and lightweight high-speed driving structure of high power-to-weight ratio engine. And it can be widely applied to various diesel engine, gasoline engine and other engine driving system design. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of this application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings: Figure 1 The overall structure schematic diagram of the embodiment of the application is described.

[0016] Explanation of reference signs: 1, crankshaft driving shaft head; 2, flexible cross-coupling sliding block; 3, oil pump load shaft head; 4, transmission wheel; 5, transmission plate. DETAILED DESCRIPTION

[0017] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0018] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0019] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0020] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0021] As shown in Figure 1 The input shaft and load shaft coupling structure device is composed of a crankshaft driving shaft head 1, a flexible cross coupling slider 2 and an oil pump load shaft head 3. The crankshaft driving shaft head 1, the flexible cross coupling slider 2 and the oil pump load shaft head 3 are connected in sequence. The flexible cross coupling slider 2 is externally sleeved with a transmission wheel 4. The flexible cross coupling slider 2 and the oil pump load shaft head 3 are also externally sleeved with a transmission plate 5.

[0022] In a preferred embodiment of the present application, the flexible cross coupling slider 2 is made of alloy steel material, the surface strengthening treatment hardness is less than 5 HRC (Rockwell hardness unit) than the hardness of the crankshaft shaft head, and the strength and matching are considered. On the basis of the long cylindrical shape, the neck structure is adopted at the middle shaft neck to make the flexible cross coupling slider 2 have a certain flexibility to compensate for part of the radial and angular displacement and adapt to the shaft deviation under high speed working condition.

[0023] In a preferred embodiment of the present application, the tenon and slot gap value between the crankshaft drive shaft head 1 and the flexible cross shaft sliding block 2 is 0.1-0.2 mm; the tenon and slot gap value between the flexible cross shaft sliding block 2 and the oil pump load shaft head 3 is 0.1-0.2 mm; the displacement is supplemented by two mutually perpendicular tenon and slot gaps.

[0024] In a preferred embodiment of the present application, the middle rod part of the flexible cross shaft sliding block 2 is designed with a hollow oil inlet hole structure. The hollow hole in the transmission wheel 4 contains the left end of the flexible cross shaft sliding block 2 with a radial gap of 0.2-0.3 mm; the right end of the flexible cross shaft sliding block 2 is contained by the transmission plate 5 oil pump designed shell with a radial gap of 0.2-0.3 mm; the oil pump load shaft head 5 is designed with an oil inlet hole structure, and the oil enters the flexible cross shaft sliding block 2 to make it soak in the oil, so as to realize the smooth work of the flexible cross shaft sliding block 2 under the lubrication and hydraulic damping of the oil.

[0025] The present application has the following advantages: the present application realizes reliable connection between the drive shaft and the load shaft by using the flexible cross shaft sliding block 2, the centering, the tenon and slot gap, and the hydraulic damping structure to compensate for the radial, axial, and angular displacement. The present application can realize the integrated accessory drive coupling structure of the crankshaft shaft end, breaks through the limitation of the traditional cross sliding block which is generally applicable to low speed (most ≤300 r / min) application scenarios, and is beneficial to realize the compact and lightweight high speed drive structure of the high power to weight ratio engine. The present application can be widely applied to various diesel engines, gasoline engines, and other engine drive system designs.

[0026] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cross-coupling slider driving structure suitable for high rotation speed, characterized in that: The application relates to a flexible cross-coupling sliding block, which comprises a crankshaft driving shaft head (1), a flexible cross-coupling sliding block (2) and an oil pump load shaft head (3), wherein the crankshaft driving shaft head (1), the flexible cross-coupling sliding block (2) and the oil pump load shaft head (3) are sequentially connected, the flexible cross-coupling sliding block (2) is externally sleeved with a transmission wheel (4), and the flexible cross-coupling sliding block (2) and the oil pump load shaft head (3) are externally sleeved with a transmission plate (5).

2. The high speed cross-coupling slider driving structure according to claim 1, wherein: The flexible cross-coupling sliding block (2) is made of alloy steel material, and the surface strengthening treatment hardness and the crankshaft shaft head hardness are less than 5 HRC.

3. The high speed cross-coupling slider driving structure according to claim 1, wherein: The flexible cross-coupling sliding block (2) is in a long cylindrical shape, and a necked structure is arranged at the middle shaft neck of the long cylindrical shape.

4. The high speed cross-coupling slider driving structure according to claim 1, wherein: The tenon-and-slot gap value between the crankshaft driving shaft head (1) and the flexible cross-coupling sliding block (2) is 0.1-0.2 mm.

5. The high speed cross-coupling slider driving structure according to claim 1, wherein: The tenon-and-slot gap value between the flexible cross-coupling sliding block (2) and the oil pump load shaft head (3) is 0.1-0.2 mm.

6. The high speed cross-coupled slider drive structure according to claim 1, wherein: The middle rod part of the flexible cross-coupling sliding block (2) is provided with a hollow oil inlet hole structure.

7. The high speed cross-coupled slider drive structure according to claim 1, wherein: The hollow hole of the transmission wheel (4) contains the left end of the flexible cross-coupling sliding block (2), and the radial gap is 0.2-0.3 mm.

8. The high speed cross-coupling slider driving structure according to claim 1, wherein: The oil pump of the transmission plate (5) is provided with a shell for containing the right end of the flexible cross-coupling sliding block (2), and the radial gap is 0.2-0.3 mm.

9. The high speed rotary cross-coupling slider drive structure according to claim 1, wherein: The oil pump load shaft head (3) is provided with an oil inlet hole structure.

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