Elastic supporting structure for vibration reduction of engine

Abstract

The utility model provides an engine damping elastic supporting structure which comprises a T-shaped connecting pipe which comprises a circular base and a cylindrical pipe vertically arranged on the circular base. The cylindrical pipe is sequentially sleeved with an annular nylon block, at least one lower rubber block, a lower metal support, an upper metal support and at least one upper rubber block from bottom to top, a connecting cover connected with the cylindrical pipe in a clamped mode is arranged on the upper rubber block, and a flat gasket is fixed to the connecting cover in a clamped mode. According to the engine shock absorber, the good energy absorption effect can be achieved for low-strength vibration and high-strength vibration, the elastic supporting structure is unitized, maintenance and replacement are convenient, a clamping structure is adopted, fixing bolts do not participate in shock absorption movement, and the service life of an engine is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of engine vibration reduction technology, and in particular relates to an engine vibration reduction elastic support structure. Background Technology

[0002] To meet emission standards, diesel engines require exhaust gas treatment devices to be installed on them for exhaust gas treatment. However, engine vibrations are transmitted to these devices, affecting their lifespan. For example, CN216111936U discloses a three-way vibration-damping metal-rubber engine vibration damper. To address this issue, a vibration damper is designed, comprising a vibration-damped object and a vibrating element. The vibration-damped object has a first through hole, within which a stepped sleeve is installed. The large and small ends of the stepped sleeve are respectively equipped with first and third damping rubber. The lower end of the damping sleeve has a disc portion, which is positioned between the disc portion and the vibration-damped object. The second damping rubber is provided, and the damping sleeve is fitted with threaded fasteners for fixing the first damping rubber, the vibration-isolated object, and the second damping rubber. This structure can absorb upward and horizontal vibrations well, but it also has the following problems: (1) The damper is restricted by the vertical direction of the mounting bolt holes and is not suitable for horizontal installation; (2) The parts are scattered and of many types, making installation inconvenient and not integrated enough; (3) The elastic deformation space of the rubber block in this structure is limited and is not suitable for high-intensity impact damping; (4) The bolt fastening in this structure is part of the damping system. The bolts that are subjected to high-frequency impact vibration for a long time will loosen, and the risk of damping failure is high. Summary of the Invention

[0003] The problem this invention aims to solve is to provide an engine vibration damping elastic support structure that has good energy absorption effect for both low-intensity and high-intensity vibrations, features modular elastic support structure, is easy to maintain and replace, adopts a snap-fit ​​structure, and has fixed bolts that do not participate in the vibration damping movement, thus extending its service life.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an engine vibration damping elastic support structure, including a T-shaped connecting pipe. The T-shaped connecting pipe includes a circular base and a cylindrical tube vertically arranged on the circular base. From bottom to top, the cylindrical tube is fitted with an annular nylon block, at least one lower rubber block, a lower metal support, an upper metal support, and at least one upper rubber block. The upper rubber block is provided with a connecting cover that snaps into the cylindrical tube. A flat gasket is snapped and fixed on the connecting cover. The lower metal support and the upper metal support are arranged opposite to each other and fixedly connected to the metal bracket.

[0005] Furthermore, the annular nylon block includes an annular portion and a through-hole portion. The lower surface of the annular portion is provided with a plurality of cylindrical holes. The through-hole portion is provided with a first cylindrical hole and a first conical hole from top to bottom. The diameter of the first cylindrical hole is equal to the diameter of the cylindrical tube.

[0006] Furthermore, both the lower metal support and the upper metal support include a circular planar portion and a folded edge portion integrally formed around the edge of the circular planar portion. The circular planar portion and the folded edge portion form a groove. A first through hole is coaxially provided on the circular planar portion. The diameter of the first through hole is larger than the diameter of the cylindrical tube.

[0007] Furthermore, the lower rubber block is a frustum-shaped structure with a second through hole coaxially arranged. The lower rubber block includes a first upper bottom surface and a first lower bottom surface. The second through hole is arranged in a second cylindrical hole and a second conical hole from top to bottom. The diameter of the second cylindrical hole is equal to the diameter of the cylindrical tube, and the diameter of the first lower bottom surface is equal to the diameter of the circular flat part.

[0008] Furthermore, the upper rubber block is a frustum-shaped structure with a third conical hole coaxially arranged. The upper rubber block includes a second upper bottom surface and a second lower bottom surface, and the diameter of the second lower bottom surface is equal to the diameter of the circular planar portion.

[0009] Furthermore, the metal bracket has a U-shaped structure and includes a fixing part and connecting parts disposed opposite to each other at both ends of the fixing part. The fixing part is provided with bolt holes for connecting with the engine. After the circular flat parts of the upper metal support and the lower metal support are in contact and connected, they are fixedly connected to the connecting part through the folded edge part.

[0010] Furthermore, the connecting cover includes a cover body, a snap-fit ​​hole coaxially disposed with the cover body, a snap-fit ​​ring extending downward at the snap-fit ​​hole, and a first annular snap-fit ​​platform disposed inside the snap-fit ​​ring. The upper end of the cylindrical tube is provided with a second annular snap-fit ​​platform that matches the first annular snap-fit ​​platform, and an annular limiting groove is provided on the cylindrical tube below the second annular snap-fit ​​platform.

[0011] Furthermore, a buckle is provided on the top of the cover, and a snap hole matching the buckle is provided on the flat pad.

[0012] Furthermore, the cylindrical tube has a fixing hole that passes through the circular base, and the flat pad has a third through hole corresponding to the fixing hole.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are:

[0014] 1. The vibration-damping elastic support structure of this utility model has at least one lower rubber block and an upper rubber block with a truncated cone structure set in the lower metal support and the upper metal support. The assembled lower rubber block and upper rubber block form a rhomboid structure, which has a good elastic deformation energy absorption effect for low-intensity vertical and horizontal impact vibrations. At the same time, by setting an annular nylon block with multiple cylindrical holes, for high-intensity vertical impact vibrations, the slight deformation of the cylindrical holes needs to absorb more impact energy. Therefore, the combination of rubber block and annular nylon block generates elastic deformation, which can consume high-intensity vertical and horizontal impact energy and maintain the relative stability of the engine position in all directions.

[0015] 2. The vibration damping elastic support structure of this utility model is modular, which makes maintenance and replacement convenient. The number of vibration damping elastic supports can be selected according to the characteristics of the engine model. It can be used for multiple engine models and types, making engine maintenance and replacement more convenient.

[0016] 3. The T-shaped connecting pipe and connecting cover of the vibration-damping elastic support structure of this utility model are assembled using a snap-fit ​​structure. The fixing bolts can be fixed to the engine chassis through the fixing holes inside the cylindrical pipe. The fixing bolts do not participate in the vibration-damping movement, avoiding damage and failure of the fixing bolt threads due to long-term vibration fatigue, thus extending the service life of the engine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an engine vibration damping elastic support structure according to this utility model.

[0018] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of section AA.

[0019] Figure 3 yes Figure 1 A top-view structural diagram.

[0020] Figure 4 This is a schematic diagram of the T-shaped connecting pipe of an engine vibration damping elastic support structure according to this utility model.

[0021] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure.

[0022] Figure 6 This is a schematic diagram of the annular nylon block of an engine vibration damping elastic support structure according to this utility model.

[0023] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure.

[0024] Figure 8This is a schematic diagram of the lower rubber block of an engine vibration damping elastic support structure according to this utility model.

[0025] Figure 9 yes Figure 8 A schematic diagram of the cross-sectional structure.

[0026] Figure 10 This is a cross-sectional schematic diagram of the upper rubber block of an engine vibration damping elastic support structure according to this utility model.

[0027] Figure 11 This is a schematic diagram of the upper metal support / lower metal support of an engine vibration damping elastic support structure according to this utility model.

[0028] Figure 12 yes Figure 11 A schematic diagram of the cross-sectional structure.

[0029] Figure 13 This is a schematic diagram of the metal bracket of an engine vibration damping elastic support structure according to this utility model.

[0030] Figure 14 This is a schematic diagram of the connecting cover of an engine vibration damping elastic support structure according to this utility model.

[0031] Figure 15 yes Figure 14 A schematic diagram of the cross-sectional structure of section BB.

[0032] Figure 16 This is a schematic diagram of the flat pad of an engine vibration damping elastic support structure according to this utility model.

[0033] In the diagram: 1-T-shaped connecting pipe; 2-circular base; 3-cylindrical pipe; 4-annular nylon block; 5-lower rubber block; 6-lower metal support; 7-upper metal support; 8-upper rubber block; 9-connecting cover; 10-flat pad; 11-metal bracket; 12-annular part; 13-through hole part; 14-cylindrical hole; 15-first cylindrical hole; 16-first conical hole; 17-circular flat part; 18-folded edge part; 19-groove; 20-first through hole; 21-second through hole; 22-First upper bottom surface; 23-First lower bottom surface; 24-Second cylindrical hole; 25-Second conical hole; 26-Third conical hole; 27-Second upper bottom surface; 28-Second lower bottom surface; 29-Fixing part; 30-Connecting part; 31-Bolt hole; 32-Cover body; 33-Snap-fit ​​hole; 34-Snap-fit ​​ring; 35-First annular locking platform; 36-Second annular locking platform; 37-Annular limiting groove; 38-Snap buckle; 39-Snap hole; 40-Fixing hole; 41-Third through hole. Detailed Implementation

[0034] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] like Figures 1-16 As shown, an engine vibration damping elastic support structure includes a T-shaped connecting pipe 1. The T-shaped connecting pipe 1 includes a circular base 2 and a cylindrical pipe 3 vertically arranged on the circular base 2. The cylindrical pipe 3 is fitted with an annular nylon block 4, at least one lower rubber block 5, a lower metal support 6, an upper metal support 7, and at least one upper rubber block 8 from bottom to top. The upper rubber block 8 is provided with a connecting cover 9 that snaps into the cylindrical pipe 3. A flat gasket 10 is snapped and fixed on the connecting cover 9. The lower metal support 6 and the upper metal support 7 are arranged opposite to each other and fixedly connected to a metal bracket 11.

[0036] This invention utilizes a combination of soft rubber and hard nylon for vibration damping, absorbing vibration energy from impacts of varying intensities in a stepped manner from low to high, thus maintaining the engine's positional stability in all directions. Simultaneously, the modular vibration damping elastic support structure facilitates maintenance and replacement. The number of vibration damping elastic supports can be selected according to the engine model, making it compatible with multiple engine types and models, thus simplifying engine maintenance and replacement. The assembly of the T-type connecting pipe 1 and the connecting cover 9 employs a snap-fit ​​structure, with the fixing bolts not participating in the vibration damping movement, extending the engine's service life.

[0037] Furthermore, the annular nylon block 4 includes an annular portion 12 and a through-hole portion 13. The lower surface of the annular portion 12 is provided with a plurality of cylindrical holes 14. The through-hole portion 13 is provided with a first cylindrical hole 15 and a first conical hole 16 from top to bottom. The diameter of the first cylindrical hole 15 is equal to the diameter of the cylindrical tube 3.

[0038] Specifically, when the annular nylon block 4 is installed with the T-shaped connecting column 1, the lower surface of the cylindrical hole 14 contacts the circular base 2. At the same time, the first cylindrical hole 15 is provided with the same diameter as the cylindrical tube 3, which can play a certain role in fixing the annular nylon block 4 and preventing displacement. A certain elastic deformation space is formed between the first conical hole 16 and the cylindrical tube 3 to improve the energy absorption effect. At the same time, the mesh structure of multiple cylindrical holes allows the small deformation of the cylindrical holes 14 to absorb more impact energy for high-intensity vertical impact vibration, thus improving the vibration reduction effect.

[0039] Furthermore, both the lower metal support 6 and the upper metal support 7 include a circular planar portion 17 and a folded edge portion 18 integrally formed around the edge of the circular planar portion 17. The circular planar portion 17 and the folded edge portion 18 form a groove 19. A first through hole 20 is coaxially provided on the circular planar portion 17. The diameter of the first through hole 20 is larger than the diameter of the cylindrical tube 3.

[0040] Furthermore, the metal bracket 11 has a U-shaped structure. The metal bracket 11 includes a fixing part 29 and a connecting part 30 disposed opposite to both ends of the fixing part 29. The fixing part 29 is provided with bolt holes 31 for connecting with the engine. After the circular flat parts 17 of the upper metal support 7 and the lower metal support 6 are in contact and connected, they are both fixedly connected to the connecting part 30 through the folded edge part 18.

[0041] Specifically, during assembly, the lower rubber block 5 and the upper rubber block 6 are located in the grooves 19 of the lower metal support 6 and the upper metal support 7, respectively. When vertical vibration occurs, the metal support moves up and down accordingly, so that the circular flat part 17 of the metal support contacts the rubber block, which plays a certain role in compression and rebound. When horizontal vibration occurs, the folded edge part 18 of the metal support contacts the rubber block, which plays a certain role in squeezing and rebound. Furthermore, the diameter of the first through hole 20 on the metal support is larger than the diameter of the cylindrical tube 3, so that a certain amount of swing space is left during horizontal vibration.

[0042] When metal supports and metal brackets are fixedly connected, the connection method can be welding, or the upper metal support, lower metal support and metal bracket can be set as an integral molded structure, which has better overall integrity.

[0043] Furthermore, the lower rubber block 5 is a frustum-shaped structure with a second through hole 21 coaxially arranged. The lower rubber block 5 includes a first upper bottom surface 22 and a first lower bottom surface 23. The second through hole 21 is arranged from top to bottom as a second cylindrical hole 24 and a second conical hole 25. The diameter of the second cylindrical hole 24 is equal to the diameter of the cylindrical tube 3, and the diameter of the first lower bottom surface 23 is equal to the diameter of the circular flat part 17.

[0044] Furthermore, the upper rubber block 8 is a frustum-shaped structure with a third conical hole 26 coaxially arranged. The upper rubber block 8 includes a second upper bottom surface 27 and a second lower bottom surface 28. The diameter of the second lower bottom surface 28 is equal to the diameter of the circular flat part 17.

[0045] Specifically, during assembly, the first upper bottom surface 22 of the lower rubber block 5 contacts the annular nylon block 4, and the first lower bottom surface 23 is located in the groove 19 of the lower metal support 6 and contacts the circular flat part 17. The second lower bottom surface 28 of the upper rubber block 8 is located in the groove 19 of the upper metal support 7 and contacts the circular flat part 17. Since both the upper rubber block 8 and the lower rubber block 5 are set as truncated cone structures, the overall elastic structure cross section is rhomboid. At the same time, the second conical hole 25 and the third conical hole 26 form an elastic deformation space with a rhomboid cross section, which has a better elastic deformation energy absorption effect for impact vibrations in the vertical and horizontal directions.

[0046] Furthermore, the connecting cover 9 includes a cover body 32, a snap-fit ​​hole 33 coaxially disposed with the cover body 32, a snap-fit ​​ring 34 extending downward at the snap-fit ​​hole 33, and a first annular snap-fit ​​platform 35 disposed inside the snap-fit ​​ring 34. The upper end of the cylindrical tube 3 is provided with a second annular snap-fit ​​platform 36 that matches the first annular snap-fit ​​platform 35, and an annular limiting groove 37 is provided on the cylindrical tube 3 below the second annular snap-fit ​​platform 36.

[0047] Furthermore, a buckle 38 is provided on the upper part of the cover 32, and a snap hole 39 matching the buckle 38 is provided on the flat pad 10.

[0048] Specifically, the various components of the entire elastic support structure are integrated and fixed together by snapping the cover 32 to the cylindrical tube 3. The specific connection method is to insert the snap ring 34 of the cover 32 onto the top of the cylindrical tube 3 and insert it into the third conical hole 26 of the upper rubber block 8. The cover 32 and the cylindrical tube 3 are snapped together by the first annular snap platform 35 and the second annular snap platform 36. At the same time, an annular limiting groove 37 is provided on the cylindrical tube 3, which plays a good limiting role in the relative movement of the cylindrical tube 3 and the connecting cover 9. The movement of the connecting cover 9 is limited to the height range of the annular limiting groove 37. Meanwhile, the flat pad 10 is fixed by snapping the snap hole 39 of the flat pad 10 into the snap buckle 38 of the cover 32. By setting the flat pad 10, the movement of the cylindrical tube 3 can be well limited when vertical vibration occurs.

[0049] Furthermore, the cylindrical tube 3 has a fixing hole 40 that passes through the circular base 2 inside, and the flat pad 10 has a third through hole 41 corresponding to the fixing hole 40.

[0050] Specifically, the fixing bolts can pass through the third through hole 41 and the fixing hole 40 to be fixed to the engine chassis. The fixing bolts do not participate in the vibration damping movement, thus avoiding damage and failure of the fixing bolt threads due to long-term vibration fatigue and extending the service life of the engine.

[0051] The working process of this utility model is as follows: First, the metal bracket is fixed to the engine through bolt holes. Since the metal bracket is fixedly connected to the upper metal support and the lower metal support, the metal bracket transmits the impact vibration from the engine in the horizontal and vertical directions to the metal support.

[0052] When the engine vibrates horizontally, the metal support moves horizontally. The folded edges of the upper and lower metal supports respectively press the truncated cone bases of the upper and lower rubber blocks. The elastic deformation of the truncated cone bases of the rubber blocks absorbs energy, reduces the impact of horizontal vibration, and returns to the correct position after weakening the impact. The T-shaped connecting pipe can limit the displacement of the upper and lower rubber blocks.

[0053] When the engine experiences low-intensity vertical vibration, the metal support moves vertically up and down. The circular flat part of the metal support presses down on the first lower bottom surface of the rubber block, causing the lower rubber block to elastically compress and deform downwards. This causes the T-shaped connecting pipe to tend to move upwards until it reaches the lower surface of the flat pad and restricts its displacement. At the same time, the second lower bottom surface of the upper rubber block tends to recover its elastic deformation and move upwards, forcing the T-shaped connecting pipe back to its initial position, i.e., the engagement position of the first and second annular locking platforms, and restricting the T-shaped connecting pipe from moving downwards again. The upper and lower rubber blocks interact and deform to absorb the energy of low-intensity impact vibration.

[0054] When the engine experiences high-intensity vertical vibration, the metal support moves vertically up and down. Under the pressure of the circular plane of the metal support, the small elastic deformation of the lower and upper rubber blocks is insufficient to absorb the high-intensity impact vibration energy. Instead, the vibration energy is transmitted downward to the annular nylon block. Compared to the rubber block, the nylon block has higher hardness. When the impact vibration energy compresses the annular nylon block, the elastic deformation of several cylindrical holes causes the annular nylon block to undergo small deformation, which consumes more energy. This combination of soft rubber and hard nylon vibration damping can absorb impact vibration energy of different intensities in a stepwise manner from low to high.

[0055] It should be noted that, depending on the application scenario, the annular nylon block can also be replaced by a hard plastic material. The material of the connecting cover can be plastic, rubber, nylon, etc., and the material of the T-shaped connecting tube can be carbon steel, aluminum alloy, etc. In addition, based on the direction during assembly, non-rubber damping blocks, such as nylon, plastic, etc., can be added above the upper rubber block or below the lower rubber block to change the damping strength effect. All of the above improvements are within the protection scope of this utility model.

[0056] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An engine vibration damping elastic support structure, characterized in that: The device includes a T-shaped connecting tube, which comprises a circular base and a cylindrical tube vertically mounted on the circular base. From bottom to top, the cylindrical tube is fitted with an annular nylon block, at least one lower rubber block, a lower metal support, an upper metal support, and at least one upper rubber block. The upper rubber block is provided with a connecting cover that engages with the cylindrical tube. A flat gasket is engaged and fixed on the connecting cover. The lower metal support and the upper metal support are arranged opposite to each other and fixedly connected to a metal bracket.

2. The engine vibration damping elastic support structure according to claim 1, characterized in that: The annular nylon block includes an annular portion and a through-hole portion. The lower surface of the annular portion is provided with a plurality of cylindrical holes. The through-hole portion is provided with a first cylindrical hole and a first conical hole from top to bottom. The diameter of the first cylindrical hole is equal to the diameter of the cylindrical tube.

3. The engine vibration damping elastic support structure according to claim 1, characterized in that: Both the lower metal support and the upper metal support include a circular planar portion and a folded edge portion integrally formed around the edge of the circular planar portion. The circular planar portion and the folded edge portion form a groove. A first through hole is coaxially provided on the circular planar portion. The diameter of the first through hole is larger than the diameter of the cylindrical tube.

4. The engine vibration damping elastic support structure according to claim 3, characterized in that: The lower rubber block is a frustum-shaped structure with a second through hole coaxially arranged. The lower rubber block includes a first upper bottom surface and a first lower bottom surface. The second through hole is arranged in a second cylindrical hole and a second conical hole from top to bottom. The diameter of the second cylindrical hole is equal to the diameter of the cylindrical tube, and the diameter of the first lower bottom surface is equal to the diameter of the circular flat part.

5. The engine vibration damping elastic support structure according to claim 3, characterized in that: The upper rubber block is a frustum-shaped structure with a third conical hole coaxially arranged. The upper rubber block includes a second upper bottom surface and a second lower bottom surface. The diameter of the second lower bottom surface is equal to the diameter of the circular flat part.

6. The engine vibration damping elastic support structure according to claim 3, characterized in that: The metal bracket has a U-shaped structure and includes a fixing part and connecting parts disposed opposite to each other at both ends of the fixing part. The fixing part is provided with bolt holes for connecting to the engine. After the circular flat parts of the upper metal support and the lower metal support are in contact and connected, they are fixedly connected to the connecting part through the folded edge part.

7. The engine vibration damping elastic support structure according to claim 1, characterized in that: The connecting cover includes a cover body, a snap-fit ​​hole coaxially arranged with the cover body, a snap-fit ​​ring extending downward from the snap-fit ​​hole, and a first annular snap-fit ​​platform disposed inside the snap-fit ​​ring. The upper end of the cylindrical tube is provided with a second annular snap-fit ​​platform that matches the first annular snap-fit ​​platform, and an annular limiting groove is provided on the cylindrical tube below the second annular snap-fit ​​platform.

8. The engine vibration damping elastic support structure according to claim 7, characterized in that: A buckle is provided on the top of the cover, and a snap hole matching the buckle is provided on the flat pad.

9. The engine vibration damping elastic support structure according to claim 8, characterized in that: The cylindrical tube has a fixing hole that passes through the circular base, and the flat pad has a third through hole corresponding to the fixing hole.

Images