Novel elastic coupling for diesel engine

Abstract

The utility model discloses a novel elastic coupling for a diesel engine, the coupling comprises a flange, a middle body, a cover plate and a vibration reduction mechanism, the vibration reduction mechanism comprises an elastic piece arranged in the middle body and a vibration reduction cavity used for installing the elastic piece, the coupling is provided with a heat dissipation assembly communicated with the outside, and the heat dissipation assembly is communicated with the vibration reduction cavity. According to the scheme, the elastic piece is arranged, due to the high elasticity of the elastic piece, the natural vibration frequency of the shafting can be reduced, the torsional vibration characteristic of the shafting of the diesel engine power device can be changed, the diesel engine does not have dangerous resonance rotating speed within the needed rotating speed range, fluctuation of the output torque of the diesel engine can be absorbed and reduced, and part of vibration energy can be absorbed; vibration amplitude during vibration point passing is reduced, shaft section torsional vibration stress is reduced, and decoupling of the rear end of the engine is facilitated. By arranging the heat dissipation assembly, heat generated by the elastic piece in the engine operation process is taken away, the elastic piece is prevented from being heated and aged, and therefore the service life of the coupler is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of couplings, and particularly relates to a novel elastic coupling for a diesel engine. BACKGROUND

[0002] During the operation of an engine, torsional vibration is generated in the crankshaft system. The combination of the high elasticity of the spring sheet inside the rear-end coupling and the damping generated by the flow of engine oil can transfer the amplitude of dangerous resonance outside the engine operating speed range, ensuring the safe operation of the engine. Therefore, the coupling is an important component for ensuring the safe operation of the engine.

[0003] A conventional plate spring coupling for the rear end of a vehicle engine is internally arranged with an intermediate block and provided with multiple groups of spring sheets. The overall volume and weight of the intermediate block and the spring sheets are large. Due to the weight limitation requirement of the whole vehicle, the overall arrangement of the engine is limited, and therefore, the weight of the coupling needs to be reduced to adapt to the existing lightweight design development.

[0004] In addition, due to the arrangement of the steel spring sheets, engine oil needs to be filled in the coupling or an auxiliary oil passage needs to be designed for lubrication and cooling of the spring sheets, resulting in a large volume and weight of the coupling. At the same time, due to the large stiffness of the spring sheets, the low stiffness design required for the decoupling of the rear end of the engine cannot be met. CONTENT OF THE INVENTION

[0005] The application provides a novel elastic coupling for a diesel engine, which solves the problems of large volume and weight of the conventional plate spring coupling and poor decoupling at the rear end.

[0006] The technical scheme adopted by the application is as follows:

[0007] A novel elastic coupling for a diesel engine, the coupling comprising a flange, an intermediate body, a cover plate and a damping mechanism, the flange and the cover plate being connected to the two ends of the intermediate body respectively, a transmission shaft passing through the center of the intermediate body, the damping mechanism comprising an elastic member arranged in the intermediate body and a damping cavity for mounting the elastic member, the coupling being provided with a heat dissipation assembly in communication with the outside, the heat dissipation assembly communicating with the damping cavity.

[0008] Preferably, the intermediate body is provided with a cavity to form the damping cavity, the damping cavity extending in the radial direction of the intermediate body, and the elastic member comprising an elastic rubber block arranged in the damping cavity.

[0009] Preferably, a plurality of elastic rubber blocks are arranged, each of the elastic rubber blocks being provided with a corresponding damping cavity, and the intermediate body being further provided with a limiting groove in communication with the damping cavities, the end portion of the elastic rubber block being located in the limiting groove.

[0010] Preferably, the elastic rubber block extends from the outer ring of the intermediate body to the inner ring of the intermediate body in sequence comprising a body section, a first necked section and a second necked section, and the extension end of the second necked section is matched and installed with the limiting groove.

[0011] Preferably, the elastic rubber blocks are uniformly distributed along the circumference of the intermediate body, and the damping cavity is a rectangular cavity.

[0012] Preferably, the heat dissipation assembly comprises a heat dissipation channel located between the intermediate body and the flange, and / or between the intermediate body and the cover plate, and one end of the heat dissipation channel is communicated to the damping cavity.

[0013] Preferably, the flange and / or the cover plate is provided with a heat dissipation through hole, and the other end of the heat dissipation channel is communicated to the heat dissipation through hole.

[0014] Preferably, the flange and / or the cover plate is provided with a plurality of heat dissipation through holes which are uniformly distributed.

[0015] Preferably, the heat dissipation through hole and the damping cavity at least partially overlap in the axial projection of the shaft coupling.

[0016] Preferably, a plurality of elastic members are uniformly arranged along the circumference of the intermediate body, and each elastic member is correspondingly provided with a damping cavity, and the intermediate body is provided with an oil passage which is communicated between two adjacent damping cavities.

[0017] As the above technical scheme is adopted, the application has the following beneficial effects:

[0018] (1) The elastic member is arranged in the application, and the high elasticity (low stiffness, large flexibility) of the elastic member can reduce the natural vibration frequency of the shaft system, change the torsional vibration characteristics of the shaft system of the diesel engine power device, make the diesel engine not appear dangerous resonance speed in the required speed range, can absorb and reduce the fluctuation of the output torque of the diesel engine, and for the diesel engine power device equipped with a reduction gear box, the knocking on the gear surface when the variable torque is reduced, prolonging the service life of the gear. The shaft coupling provided with the elastic member in the application has good damping vibration reduction characteristics, can absorb part of the vibration energy, reduce the vibration amplitude when passing through the vibration point, reduce the torsional vibration stress of the shaft section, and is beneficial to the decoupling of the engine rear end. At the same time, the elastic member replaces the conventional spring sheet, which is beneficial to reducing the overall weight of the shaft coupling and meeting the design requirements of reducing the weight of the whole vehicle.

[0019] In addition, the application also provides a heat dissipation assembly for dissipating heat from the damping cavity, i.e. dissipating heat from the elastic member located in the damping cavity, so as to take away the heat generated by the elastic member during the operation of the engine, prevent the elastic member from being heated and aged, and thus prolong the service life of the shaft coupling.

[0020] (2) In the scheme, the elastic rubber block is used to replace the spring sheet to realize vibration reduction, compared with the rigid spring sheet, the elastic rubber block has smaller weight, can effectively reduce the overall weight of the coupling, and meets the design concept and requirement of the overall vehicle lightweight.

[0021] (3) The first and second reduced diameter sections of the elastic rubber block are arranged, on one hand, the arrangement facilitates installation and alignment, and on the other hand, the gradually reduced inner diameter meets the morphological structure change trend of the intermediate body, thereby being beneficial to maintaining the overall balance of the intermediate body and ensuring stable operation of the coupling.

[0022] (4) The heat dissipation through holes are arranged on the flange and the cover plate, the heat dissipation through holes are communicated to form a heat dissipation channel, the heat dissipation channel is communicated to the vibration reduction cavities, heat dissipation is performed on the elastic rubber block inside, air circulation inside the coupling is strengthened, heat generated by the elastic rubber block during operation of the overall vehicle is quickly taken away, the elastic rubber block is prevented from aging and failure, and the service life of the coupling is prolonged. In addition, a plurality of heat dissipation through holes are arranged, which is beneficial to further reducing the overall weight of the coupling, thereby reducing the overall weight of the vehicle.

[0023] (5) The oil passing channel is arranged to communicate adjacent vibration reduction cavities, lubricating oil circulation and storage space are increased, and the lubricating oil circulation is accelerated, lubricating oil is circulated between the elastic members, i.e., between the vibration reduction cavities, thereby being beneficial to strengthening the lubricating effect of the elastic members, reducing the wear of the elastic members and the intermediate body, and prolonging the service life of the elastic members and the intermediate body. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a structure schematic view of the coupling in an embodiment of the present application;

[0026] Figure 2 It is a sectional view of the coupling in an embodiment of the present application;

[0027] Figure 3 It is a heat dissipation through hole schematic view of the flange side in an embodiment of the present application;

[0028] Figure 4 It is a heat dissipation through hole schematic view of the cover plate side in an embodiment of the present application.

[0029] Explanation of reference signs:

[0030] 1-flange, 2-cover plate, 3-intermediate body, 31-vibration reduction cavity, 32-limiting groove, 4-elastic rubber block, 41-body section, 42-first reduced diameter section, 43-second reduced diameter section, 5-heat dissipation through hole. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concepts of the present application, the following will be described in detail with reference to the accompanying drawings.

[0032] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in a variety of ways other than those specifically described herein, and the scope of the present application is not limited to the specific embodiments described herein. It is to be noted that in this document and in its claims, the singular forms "a", "an" and "the" do not exclude the plural reference unless the context clearly dictates otherwise. Thus, the references "a", "an" or "the" are generally construed to mean "one or more" unless otherwise stated.

[0033] In addition, in the description of the present application, it needs to be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element 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.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0036] The present application provides a new type of elastic coupling for diesel engines, which comprises a coupling body and a coupling sleeve. Figures 1 to 4As shown, the coupling includes a flange 1, an intermediate body 3, a cover plate 2 and a vibration damping mechanism. The flange 1 and the cover plate 2 are respectively connected to the two ends of the intermediate body 3. The transmission shaft passes through the center of the intermediate body 3. The vibration damping mechanism includes an elastic member arranged on the intermediate body 3 and a vibration damping cavity 31 for installing the elastic member. The coupling is provided with a heat dissipation component connected to the outside, and the heat dissipation component is connected to the vibration damping cavity 31.

[0037] The present application scheme is provided with an elastic part, which can reduce the natural vibration frequency of the shaft system through its high elasticity (low stiffness and high flexibility of the elastic part), change the torsional vibration characteristics of the diesel engine power unit shaft system, and prevent the diesel engine from having dangerous resonant speeds within the required speed range. It can absorb and reduce the fluctuation of the diesel engine output torque, and for a diesel engine power unit equipped with a reduction gearbox, it can reduce the impact on the gear surface during variable torque and extend the service life of the gear. The coupling provided with the elastic part in the present scheme has good damping and vibration reduction characteristics, can absorb part of the vibration energy, reduce the vibration amplitude when passing through the vibration point, reduce the torsional vibration stress of the shaft section, and is beneficial to the decoupling of the rear end of the engine. At the same time, the elastic part replaces the conventional spring, which is beneficial to reducing the overall weight of the coupling and meeting the design requirements of reducing the weight of the entire vehicle.

[0038] At the same time, this solution also provides a heat dissipation component to dissipate heat from the vibration damping cavity 31, that is, to dissipate heat from the elastic parts located in the vibration damping cavity 31, thereby taking away the heat generated by the elastic parts during engine operation, preventing the elastic parts from aging due to heat, and thus improving the service life of the coupling.

[0039] In addition, it can be understood that the form of the vibration damping cavity 31 can be formed by radially arranging relative protrusions on the inner wall of the intermediate body 3, and the elastic member is located between the two opposite protrusions and is clamped by them. The two side walls of the elastic member are in contact with the two protrusions, and the two sides facing the flange 1 and the cover plate 2 are uncovered. The two sides of the elastic member can be directly connected to the outside through the heat dissipation component. The forming of the vibration damping cavity 31 in this way is easy to understand in this field.

[0040] In one embodiment, if Figure 2 As shown, the intermediate body 3 is provided with a cavity to form a vibration-damping chamber 31. The vibration-damping chamber 31 extends in the radial direction of the intermediate body 3. The elastic member includes an elastic rubber block 4 disposed in the vibration-damping chamber 31. The elastic rubber block 4 replaces the spring to achieve vibration reduction. Compared with the rigid spring, the elastic rubber block 4 is lighter, which can effectively reduce the overall weight of the coupling, making it consistent with the design concept and requirements of lightweight vehicles.

[0041] Furthermore, there are multiple elastic rubber blocks 4 , each of which is provided with a corresponding vibration damping cavity 31 . The intermediate body 3 is also provided with a limiting groove 32 communicating with the vibration damping cavity 31 , and the end of the elastic rubber block 4 is located in the limiting groove 32 .

[0042] The limiting groove 32 is a commonly used limiting form, which can be communicated with the damping cavity 31, and facilitates the installation and limiting of the elastic rubber block 4. Meanwhile, the limiting groove 32 can be provided with an interference fit with the elastic rubber block 4, and there is a gap between the elastic rubber block 4 and the limiting groove 32. In work, the lubricating oil can pass through the gap to lubricate the end limiting part of the elastic rubber block 4, thereby reducing the wear of the elastic rubber block 4 and the intermediate body 3, and protecting the service life of the elastic rubber block 4 and the intermediate body 3.

[0043] Further, the elastic rubber block 4 extends from the outer circle of the intermediate body 3 to the inner circle of the intermediate body 3 and sequentially includes a body section 41, a first necked section, and a second necked section, and the extension end of the second necked section is fitted and installed with the limiting groove 32.

[0044] The elastic rubber block 4 is provided with the first necked section 42 and the second necked section 43, which on the one hand facilitates the installation and alignment, and on the other hand, the gradually decreasing inner diameter conforms to the morphological structure change trend of the intermediate body 3, thereby being beneficial to maintaining the overall balance of the intermediate body 3 and protecting the stable operation of the coupling.

[0045] Preferably, the elastic rubber blocks 4 are evenly distributed along the circumference of the intermediate body 3, and the damping cavity 31 is a rectangular cavity. The evenly distributed elastic rubber blocks 4 are beneficial to maintaining the overall force balance of the coupling, and are beneficial to simultaneously damping at multiple angles and positions of the coupling, thereby achieving good protection effect on the coupling itself and the engine. The rectangular cavity has a simple processing form, and the rectangular cavity can achieve good support and carrying strength of the elastic rubber block 4.

[0046] In one embodiment, as shown in Figures 2 to 4 The heat dissipation assembly includes a heat dissipation channel located between the intermediate body 3 and the flange 1, and / or located between the intermediate body 3 and the cover plate 2, and one end of the heat dissipation channel is communicated to the damping cavity 31.

[0047] It can be understood that, since the flange 1 has a certain thickness, the heat dissipation channel also includes the thickness of the flange 1 from the heat dissipation through hole 5 to the intermediate body 3, and the thickness of the cover plate 2 from the heat dissipation through hole 5 to the intermediate body 3.

[0048] Further, the flange 1 and / or the cover plate 2 are provided with the heat dissipation through hole 5, and the other end of the heat dissipation channel is communicated to the heat dissipation through hole 5.

[0049] The flange 1 and / or the cover plate 2 are uniformly provided with a plurality of heat dissipation through holes 5.

[0050] Preferably, the present scheme is provided with heat dissipation through holes 5 on the flange 1 and the cover plate 2, the heat dissipation channels are formed by connecting the damping cavities 31 through the heat dissipation through holes 5, the heat of the elastic rubber block 4 is dissipated, the air circulation inside the coupling is strengthened, the heat of the elastic rubber block 4 during the operation of the whole vehicle is quickly taken away, the aging failure of the elastic rubber block 4 is prevented, and the service life of the coupling is improved. And setting multiple heat dissipation through holes 5 is beneficial to further reduce the overall weight of the coupling, thereby reducing the overall weight of the vehicle.

[0051] It can be understood that the sizes of the heat dissipation through holes 5 on the flange 1 are consistent, and the sizes of the heat dissipation through holes 5 on the cover plate 2 are consistent, but the sizes of the heat dissipation through holes 5 on the flange 1 and the cover plate 2 can be set to be consistent or inconsistent according to actual conditions.

[0052] Preferably, the projection of the heat dissipation through hole 5 and the damping cavity 31 in the axial direction of the coupling at least partially overlaps.

[0053] In this way, the heat dissipation through hole 5 and the damping cavity 31 form a correspondence in the axial position, so that the heat of the elastic rubber block 4 can be quickly taken away and dissipated, preventing the aging of the elastic rubber block 4 and improving the service life of the coupling. And according to this way, the elastic rubber block 4 and the heat dissipation through hole 5 are distributed in the coupling, which is beneficial to the overall stress balance.

[0054] In one embodiment, as shown in Figure 2 The intermediate body 3 is provided with an oil passing channel (not shown in the figure) connecting the adjacent two damping cavities 31.

[0055] The present scheme sets the oil passing channel connecting the adjacent damping cavities 31, increases the lubricating oil circulation and storage space, and is beneficial to accelerate the circulation of the lubricating oil, facilitating the circulation of the lubricating oil between the elastic members, i.e. between the damping cavities 31, thereby facilitating the lubrication effect of the elastic members, reducing the wear of the elastic members and the intermediate body 3, and improving the service life of the elastic members and the intermediate body 3.

[0056] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0057] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0058] The above only describes the embodiments of the present application and is not used to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A new type of elastic coupling for diesel engine, said coupling comprising flanges (1), a middle body (3), a cover plate (2) and a damping mechanism, said flanges (1) and said cover plate (2) are connected with both ends of said middle body (3) respectively, a driving shaft passes through the center of said middle body (3), characterized in that, The damping mechanism comprises an elastic member arranged in the intermediate body (3) and a damping cavity (31) for mounting the elastic member, the coupling is provided with a heat dissipation assembly in communication with the outside, and the heat dissipation assembly communicates with the damping cavity (31).

2. The new type of elastic coupling for diesel engine according to claim 1, characterized in that, The intermediate body (3) is provided with a cavity to form the damping cavity (31), the damping cavity (31) extends in the radial direction of the intermediate body (3), and the elastic member comprises an elastic rubber block (4) arranged in the damping cavity (31).

3. The new type of elastic coupling for diesel engine according to claim 2, characterized in that, The elastic rubber block (4) is provided with a plurality of elastic rubber blocks (4), each of the elastic rubber blocks (4) is provided with a corresponding damping cavity (31), and the intermediate body (3) is further provided with a limiting groove (32) in communication with the damping cavities (31), and the end of the elastic rubber block (4) is located in the limiting groove (32).

4. The elastic coupling for a new type of diesel engine according to claim 3, characterized in that, The elastic rubber block (4) extends from the outer ring of the intermediate body (3) to the inner ring of the intermediate body (3) and sequentially comprises a body segment (41), a first necked segment (42) and a second necked segment (43), and the extension end of the second necked segment (43) is matched and mounted with the limiting groove (32).

5. The elastic coupling for a new type of diesel engine according to claim 3, characterized in that, The elastic rubber block (4) is uniformly distributed along the circumference of the intermediate body (3), and the damping cavity (31) is a rectangular cavity.

6. The new type of elastic coupling for diesel engine according to claim 1, characterized in that, The heat dissipation assembly comprises a heat dissipation channel located between the intermediate body (3) and the flange (1) and / or between the intermediate body (3) and the cover plate (2), and one end of the heat dissipation channel communicates with the damping cavity (31).

7. The new type of elastic coupling for diesel engine according to claim 6, characterized in that, The flange (1) and / or the cover plate (2) is provided with a heat dissipation through hole (5), and the other end of the heat dissipation channel communicates with the heat dissipation through hole (5).

8. The new type of elastic coupling for diesel engine according to claim 7, characterized in that, The flange (1) and / or the cover plate (2) is provided with a plurality of heat dissipation through holes (5).

9. The new type of elastic coupling for diesel engine according to claim 7, characterized in that, The projection of the heat dissipation through hole (5) and the damping cavity (31) in the axial direction of the coupling at least partially overlaps.

10. The elastomeric coupling of claim 1, wherein, The elastic member is uniformly provided with a plurality of elastic members along the circumference of the intermediate body (3), and each of the elastic members is provided with a corresponding damping cavity (31), and the intermediate body (3) is provided with an oil passing channel in communication with two adjacent damping cavities (31).

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