A vibration-damping torque transmission assembly, shaft coupling, power transmission system, and engineering vehicle

Abstract

The application discloses a kind of vibration reduction transmission torque subassembly, shaft coupling device, power transmission system and engineering vehicle, vibration reduction transmission torque subassembly includes at least one circular thin plate, and the axial side of circular thin plate is equipped with at least one group of circumferential array with acoustic black hole structure as reference circle center, and the center cut-off area of each acoustic black hole structure is closely attached with damping layer, first by the elastic deformation of circular thin plate absorption vibration energy, then by acoustic black hole structure guide vibration energy to damping layer, finally by damping layer dissipate the vibration energy gathered;The outer ring edge and inner ring edge of circular thin plate are each equipped with at least one group of circumferential array with axial through hole as reference circle center;Shaft coupling device, power transmission system and engineering vehicle all include vibration reduction transmission torque subassembly.The application is through acoustic black hole effect and structural innovation, solve the problem that large tonnage heavy-duty mine car half shaft breaks, vibration noise is big and torque transmission efficiency is insufficient under heavy load uphill working condition.

Description

Technical Field

[0001] This invention relates to a vibration reduction and torque amplification acoustic black hole effect coupling device for large-tonnage mining cars, belonging to the field of engineering vehicle technology. Background Technology

[0002] Heavy-duty mining dump trucks bear heavy loads in mine transportation, and their rear axle wheel-side reducer power transmission system has long faced the following technical challenges: 1. High risk of half-shaft (i.e. drive shaft) fracture: In traditional designs, the half-shaft between the motor output end and the first-stage planetary gear reducer is too long. Under frequent start-stop and high torque impact, stress concentration is likely to occur, leading to fatigue fracture, which seriously affects equipment life and operational safety.

[0003] 2. Vibration and noise issues: The half-shaft (i.e., the drive shaft) generates high-frequency noise due to torsional and bending vibrations during power transmission. Long-term exposure can damage the driver's health, and vibration energy loss reduces transmission efficiency.

[0004] 3. Insufficient torque transmission efficiency: The existing half-shaft (i.e., drive shaft) structure only undertakes the transmission task, and has limited improvement in torque enhancement effect, making it difficult to meet the high torque requirements under complex working conditions in mines.

[0005] In existing technologies, conventional solutions often increase strength by increasing the shaft diameter or using composite materials, but this leads to increased weight and cost; vibration reduction methods are limited to adding dampers or vibration isolation pads, but these take up a lot of space and have limited effectiveness. Summary of the Invention

[0006] The present invention aims to provide a coupling device that integrates lightweight, high reliability, vibration reduction and noise reduction, and high-efficiency torque increase. Through the acoustic black hole effect and structural innovation, it solves the problems of half-shaft breakage, high vibration and noise, and insufficient torque transmission efficiency under heavy load uphill conditions in heavy-duty mining cars.

[0007] This invention is implemented according to the following technical solution: In a first aspect, the present invention provides a vibration damping and torsion transmission component, comprising at least one annular thin plate, wherein an axial side surface of the annular thin plate is provided with at least one set of acoustic black hole structures arranged in a circular array with the center as a reference, and a damping layer is tightly attached to the central cut-off region of each acoustic black hole structure. Vibration energy is first absorbed by the elastic deformation of the annular thin plate, then the vibration energy is guided to the damping layer by the acoustic black hole structure, and finally the accumulated vibration energy is dissipated by the damping layer; the outer ring edge and the inner ring edge of the annular thin plate are each provided with at least one set of axial through holes arranged in a circular array with the center as a reference.

[0008] In some embodiments, when there are at least two annular plates, the at least two annular plates are stacked together coaxially with acoustic black hole structures in the same direction. Different vibration damping and torsional transmission effects are achieved by increasing or decreasing the number of annular plates and different numbers of rings and acoustic black hole structures in each ring. Adjacent annular plates are separated by placing several shims to form an air cavity for providing air damping. The stacked annular plates are fastened by the circumferential fastener I engaging with the axial through hole on the inner ring edge.

[0009] In some embodiments, an outer ring washer and an inner ring washer, coaxial with the two adjacent annular plates, are placed between each of the two adjacent annular plates. The outer ring washer and the inner ring washer are each provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference. The axial through holes on the outer ring washer correspond one-to-one with the axial through holes on the outer ring edge of the annular plate, and the axial through holes on the inner ring washer correspond one-to-one with the axial through holes on the inner ring edge of the annular plate.

[0010] In some embodiments, the thickness of the annular thin plate is 2mm-10mm, and its material is steel; and / or, the damping layer is bonded to the acoustic black hole structure by an adhesive.

[0011] Secondly, the present invention provides a coupling device, comprising an input end shaft segment, an input end assembly, an intermediate connecting shaft segment, an output end assembly, and an output end shaft segment arranged coaxially and fastened together in sequence; wherein the input end assembly and the output end assembly both include the aforementioned vibration damping and torsion transmission components.

[0012] In some embodiments, the input end assembly further includes a connecting plate and an outer flange; the vibration damping and torque transmission assembly is arranged between one axial end face of the intermediate connecting shaft section and one axial end face of the outer flange, the connecting plate is arranged on the other axial end face of the outer flange, and the connecting plate, outer flange, vibration damping and torque transmission assembly and intermediate connecting shaft section are fastened by peripheral fasteners II; the input end shaft section is fixed to the center of the axial outer side of the connecting plate by peripheral fasteners III.

[0013] In some embodiments, an outer ring pad is provided between the vibration damping and torsion transmission assembly and the axial side facing the intermediate connecting shaft section, and an inner ring pad is provided in the inner ring of the outer ring pad; an outer ring pad is provided between the vibration damping and torsion transmission assembly and the axial side facing the outer flange, and an inner ring pad is provided in the inner ring of the outer ring pad; the outer ring pad is provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference, and the axial through holes on the outer ring pad correspond one-to-one with the axial through holes on the outer ring edge of the annular plate; the inner ring pad is provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference, and the axial through holes on the inner ring pad correspond one-to-one with the axial through holes on the inner ring edge of the annular plate; the outer ring pads on both sides are fastened by peripheral fasteners II, and the inner ring pads on both sides are fastened by peripheral fasteners I. The inner and outer ring pads play a role in pressing the annular plate, enhancing torsion transmission, and isolating vibration.

[0014] In some embodiments, the connecting disc includes a cylindrical body I and a circular plate fixed to one axial end face of the cylindrical body I; the outer flange includes a cylindrical body II and an annular flange a fixed to the middle of the inner circumferential surface of the cylindrical body II and extending radially inward; the intermediate connecting shaft section includes a cylindrical body III and an annular flange b fixed to both ends of the outer circumferential surface of the cylindrical body III and extending radially outward; the connecting disc and the intermediate connecting shaft section are both inserted into the cylindrical body II of the outer flange; the cylindrical body I, the annular flange a, and the annular flange b are each provided with at least one set of axial through holes arranged in a circumferential array with their respective centers as reference; the axial through holes on the cylindrical body I, the annular flange a, and the annular flange b are all corresponding one-to-one with the axial through holes on the outer ring edge of the annular plate; the input end shaft section is provided with at least one set of axial threaded holes arranged in a circumferential array with their centers as reference on the axial side facing the connecting disc; the middle of the circular plate is provided with a plurality of axial through holes corresponding one-to-one with the axial threaded holes.

[0015] In some embodiments, the input and output components have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; and / or, the input and output shaft segments have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; and / or, the intermediate connecting shaft segment is a symmetrical member based on its own central radial section.

[0016] Thirdly, the present invention provides a power transmission system, comprising: The aforementioned coupling device; The motor assembly has its output end connected to the input shaft section of the coupling device via half-shaft I. The planetary reduction gear system has its input end connected to the output shaft of the coupling device via half shaft II. The power output from the motor assembly is transmitted to the planetary reduction gear system via the coupling device. The coupling device is used for vibration reduction and noise reduction, and the planetary reduction gear system is used to increase the torque and speed of the power before outputting it outward.

[0017] In some embodiments, both the input shaft segment and the output shaft segment are provided with axially extending external splines on their outer circumferential surfaces, and both the output end of the motor assembly and the input end of the planetary reduction gear system are provided with axially extending external splines; both half-shaft I and half-shaft II are cylindrical, and the inner circumferential surfaces of both ends of the cylinder are provided with internal splines that mate with the external splines. Half-shaft I is connected to the input shaft segment and the output end of the motor assembly via splines, and half-shaft II is connected to the output shaft segment and the input end of the planetary reduction gear system via splines.

[0018] Fourthly, the present invention provides an engineering vehicle, comprising: Frame and hub; In the aforementioned power transmission system, both the motor assembly and the planetary reduction gear system are fixed to the frame. The planetary reduction gear system is connected to the wheel hub, and the power output from the planetary reduction gear system is transmitted to the wheel hub to drive the wheel hub to rotate, thereby driving the vehicle.

[0019] Beneficial effects of this invention: 1. Enhanced reliability: The shortened half-shaft length reduces the risk of breakage, and combined with the vibration suppression of the acoustic black hole-damping layer, it can extend the service life.

[0020] 2. Excellent noise reduction performance: The ring-shaped thin plate couples the acoustic black hole and damping layer structure. Multiple ring-shaped thin plates are assembled by compression. The air cavity between the ring-shaped thin plates can provide air damping. The air damping can enhance the dissipation of vibration energy by the ring-shaped thin plates, thereby improving the overall vibration reduction effect of the coupling device. Furthermore, the acoustic black hole can effectively reduce high-frequency vibration noise by concentrating vibration energy to the central cut-off area and dissipating it by the damping layer laid in the central cut-off area. This can further achieve vibration reduction and noise reduction, improve the cockpit environment and meet the requirements of mining environmental protection regulations.

[0021] 3. High-efficiency torque transmission: Multiple stainless steel ring plates are assembled together by bolts and washers to form a compact and highly flexible coupling. The two ends of the coupling are connected to the drive shaft, which can compensate for the angular, radial and axial deviations of the two shaft segments during installation, realize the displacement compensation function, and maintain the continuity of torque transmission. This improves the reliability of the coupling and enhances the overall torque transmission effect of the wheel-side reducer, making it suitable for heavy-duty climbing conditions of large-tonnage mining cars.

[0022] 4. Improved lightweight and compactness: The coupling is connected to the input flange and the output flange at both ends. The input flange and the output flange are fastened to one end of the input shaft section and the output shaft section respectively by bolts. The other end of the input shaft section and the output shaft section are connected to the motor output end and the planetary gear train input end respectively by splines. Disassembly is convenient and installation and maintenance are easy.

[0023] 5. Significant economic benefits: By coupling multiple vibration damping components, the reliability of the rear axle transmission of heavy-duty mining cars is improved compared with the traditional integrated half-shaft, avoiding the need to replace the entire half-shaft and saving costs. Attached Figure Description

[0024] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0025] In the attached diagram: Figure 1 This is a connection block diagram of the power transmission system of the present invention; Figure 2 This is an axial cross-sectional view of the coupling device of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the coupling device of the present invention; Figure 4 This is an isometric view of the coupling device of the present invention; Figure 5 This is a front view of a single annular thin-plate structure of the present invention; Figure 6 This is a cross-sectional view of the single annular thin plate structure of the present invention. Figure 5 (Central AA direction) Figure 7 This is a schematic diagram showing the installation position of the coupling device of the present invention.

[0026] In the diagram: 1. Input end shaft segment, 2. Input end shaft segment bolt, 3. Input end connecting plate, 4. Input end annular thin plate, 5. Input end damping layer, 6. Input end outer ring bolt, 7. Input end outer flange, 8. Input end outer ring gasket, 9. Input end outer ring washer, 10. Input end outer ring nut, 11. Intermediate connecting shaft segment, 12. Output end outer flange, 13. Output end connecting plate, 14. Output end shaft segment, 15. Output end shaft segment bolt, 16. Output end inner ring bolt, 17. Output end inner ring gasket, 18. Output 19. Output end inner ring washer; 20. Output end inner ring nut; 21. Output end circular thin plate; 22. Output end damping layer; 23. Output end outer ring bolt; 24. Output end outer ring pad; 25. Output end outer ring washer; 26. Input end inner ring nut; 27. Input end inner ring pad; 28. Input end inner ring washer; 29. ​​Frame; 30. Hub; 31. Planetary reduction gear train; 32. Motor assembly; 401. Acoustic black hole structure; 402. Inner ring bolt hole; 403. Outer ring bolt hole.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figure 2 , Figure 4As shown, this invention provides a coupling device that integrates lightweight, high reliability, vibration reduction and noise reduction, and high-efficiency torque increase, and applies it to the rear axle transmission system of a large-tonnage dual-axle rigid mining car to solve the problems of half-shaft breakage, high vibration and noise, and insufficient torque transmission efficiency under heavy-load uphill conditions in large-tonnage heavy mining cars.

[0032] like Figure 1 and Figure 7 As shown, a power transmission system includes a coupling device, a motor assembly 32, and a planetary reduction gear system 31. The output end of the motor assembly 32 is connected to the input end shaft section 1 of the coupling device via half-shaft I. The input end of the planetary reduction gear system 31 is connected to the output end shaft section 14 of the coupling device via half-shaft II. The power output by the motor assembly 32 is transmitted to the planetary reduction gear system 31 via the coupling device. The coupling device is used for vibration reduction and noise reduction, and the planetary reduction gear system 31 is used to increase the torque and speed of the power before outputting it outward.

[0033] Further options, such as Figure 7 As shown, both the outer circumferential surfaces of the input shaft segment 1 and the output shaft segment 14 are provided with axially extending external splines. The output end of the motor assembly 32 and the input end of the planetary reduction gear system 31 are also provided with axially extending external splines. Both half-shaft I and half-shaft II are cylindrical. The inner circumferential surfaces of both ends of the cylinder are provided with internal splines that mate with the external splines. Half-shaft I is connected to the input shaft segment 1 and the output end of the motor assembly 32 via splines, and half-shaft II is connected to the output shaft segment 14 and the input end of the planetary reduction gear system 31 via splines.

[0034] As can be seen, the present invention disassembles the integrated half-shaft between the output end of the motor assembly and the input end of the planetary gear reducer into a three-section structure of half-shaft I, coupling device and half-shaft II, which can reduce the stress of the transmission shaft, improve the output torque capacity of the wheel-side reducer, and facilitate rectification and maintenance.

[0035] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the coupling device includes an input end shaft segment 1, an input end assembly, an intermediate connecting shaft segment 11, an output end assembly, and an output end shaft segment 14, which are arranged coaxially and fastened together in sequence. Both the input end assembly and the output end assembly include vibration damping and torsion transmission components. The vibration damping and torsion transmission components include at least one annular thin plate. One axial side of the annular thin plate is provided with at least one set of acoustic black hole structures arranged in a circular array with the center as the reference. The central cut-off area of ​​each acoustic black hole structure is tightly fitted with a damping layer. The vibration energy is first absorbed by the elastic deformation of the annular thin plate, then guided to the damping layer through the acoustic black hole structure, and finally dissipated by the damping layer. The outer ring edge and the inner ring edge of the annular thin plate are each provided with at least one set of axial through holes arranged in a circular array with the center as the reference.

[0036] It should be noted that the symmetrical components of the coupling device, namely the input end assembly and the output end assembly, have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; the input end shaft segment and the output end shaft segment have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; the intermediate connecting shaft segment is a symmetrical component with its own central radial section as a reference.

[0037] In the preferred embodiment, the thickness of the annular sheet is 2mm-10mm, and its material is preferably stainless steel. However, it is not limited to stainless steel; any steel with high toughness, yield strength, and fatigue resistance is acceptable.

[0038] It should be noted that the acoustic black hole structure refers to a circular annular thin plate in the acoustic black hole region whose thickness gradually decreases according to a power law: h(x) = 0.0153x^2 + 1.5. This causes the wave velocity of curved waves to decrease and the wavelength to shorten. Here, h(x) represents the cross-sectional height of the acoustic black hole structure, and with the center of the black hole structure as the origin of the coordinate system, x represents the horizontal distance. When the theoretical thickness approaches zero, the wave velocity also approaches zero, and the wave cannot reach the center of the black hole, thus being captured. Considering practical engineering feasibility, a constant thickness region is set in the central region of the acoustic black hole structure, named the truncated region. A damping layer is laid in the truncated region. The damping layer can efficiently convert the vibration energy captured in the truncated region at the center of the black hole into heat energy for dissipation, thereby achieving vibration reduction and noise reduction of the transmission device.

[0039] The damping layer, a damping material with a high loss factor, is bonded to the cutoff region at the center of the acoustic black hole using an adhesive to dissipate the vibrational energy accumulated there. In this example, a high-viscosity, low-stiffness viscoelastic adhesive (such as epoxy resin or polyurethane adhesive) is used to ensure a tight bond between the damping layer and the cutoff region, while allowing for dynamic deformation. Simultaneously, selecting an adhesive compatible with both the substrate material and the damping layer avoids chemical reactions or delamination.

[0040] It is known that by utilizing the high flexibility of the annular thin plate, large deformations caused by local stress concentration can be compensated, thereby avoiding damage and enhancing the overall torsional transmission capacity of the coupling device. An acoustic black hole structure is opened on the annular thin plate assembly, and a damping layer is covered in the cut-off area at the center of the acoustic black hole to suppress high-frequency vibration, reduce noise radiation, and thus reduce the impact of vibration on the fatigue life of the half shaft. Through the coupling effect of the three components—the annular thin plate, the acoustic black hole structure, and the damping layer—the vibration reduction and noise reduction effect of the half shaft can be significantly improved.

[0041] Further options, such as Figure 2 , Figure 3As shown, when there are at least two annular thin plates, the at least two annular thin plates are stacked together coaxially and in the same direction as the acoustic black hole structure; each of the two adjacent annular thin plates is separated by placing several shims to form an air cavity for providing air damping, and the stacked annular thin plates are fastened by the cooperation of the peripheral fastener I with the axial through hole of the inner ring edge.

[0042] It should be noted that the air cavity can provide a certain amount of air damping, further enhancing the dissipation of vibration energy by the annular thin plate, thereby improving the overall vibration reduction effect of the coupling device.

[0043] Preferred solutions, such as Figure 2 , Figure 5 As shown, since the vibration damping and torque transmission components in the input and output components are exactly the same, the vibration damping and torque transmission components in the input component will be further explained below. The outer ring edge of the input annular thin plate 4 is provided with a ring of outer ring bolt holes 403, and the inner ring edge of the input annular thin plate 4 is provided with a ring of inner ring bolt holes 402. The peripheral fastener I consists of a peripheral bolt and a matching peripheral nut (i.e., the input inner ring nut 26 and the input inner ring bolt).

[0044] Preferred solutions, such as Figure 5 As shown, the inner ring edge of the input end annular thin plate 4 is provided with 12 evenly spaced inner ring bolt holes 402, and the outer ring edge of the input end annular thin plate 4 is provided with 18 evenly spaced outer ring bolt holes 403.

[0045] Further options, such as Figure 2 , Figure 3 As shown, an outer ring washer and an inner ring washer, coaxial with the ring washer, are placed between two adjacent annular thin plates. Both the outer ring washer and the inner ring washer are provided with at least one set of axial through holes arranged in a circular array with the center as the reference. The axial through holes on the outer ring washer correspond one-to-one with the axial through holes on the outer ring edge of the annular thin plate, and the axial through holes on the inner ring washer correspond one-to-one with the axial through holes on the inner ring edge of the annular thin plate.

[0046] It should be noted that the attached diagram shows 10 uniformly spaced acoustic black hole structures on the annular thin plate. In actual use, different vibration reduction effects can be achieved by increasing or decreasing the number of rings on the annular thin plate and the number of acoustic black hole structures in each ring. Different vibration reduction effects can also be achieved by modifying the power law relationship of the cross-section of the acoustic black hole structures. The input and output ends of the coupling device each use 3 annular thin plates. In actual use, the number of annular thin plates can be increased to enhance the vibration reduction and torsional transmission effect.

[0047] Specifically, such as Figure 5As shown, an input end outer ring gasket 9 and an input end inner ring gasket 28 are placed between each of two adjacent input end annular thin plates 4, and the central cut-off region of the acoustic black hole structure 401 is tightly fitted with an input end damping layer 5; an output end outer ring gasket 24 and an output end inner ring gasket 18 are placed between each of two adjacent output end annular thin plates 20, and the central cut-off region of the acoustic black hole structure is tightly fitted with an output end damping layer 21.

[0048] It is known that the vibration damping and torque transmission components built into the input and output ends of the coupling device, as the core torque transmission and vibration control unit, are pressed together by multiple bolts and washers. The vibration damping and torque transmission components include three annular thin plates, which absorb vibration energy through elastic deformation to reduce mid-to-high frequency vibration noise and improve the reliability of the transmission system. Each annular thin plate is designed with ten evenly spaced acoustic black hole structures, whose cross-sectional thickness gradually changes according to a power function law, forming a waveguide effect and guiding vibration energy to converge towards the black hole truncated region. The acoustic black hole truncated region is covered with a high loss factor damping layer to dissipate the accumulated vibration energy, thereby further realizing vibration reduction and noise reduction between the motor output end and the planetary gear train input end. The two ends of the coupling device are connected to the motor output end and the planetary gear train input end by splines, which can shorten the overall length of the half shaft, effectively reduce the risk of half shaft breakage, and improve transmission reliability.

[0049] The following provides a further explanation of the specific structure of the input component described above.

[0050] like Figure 2 As shown, the input end assembly also includes an input end connecting plate 3 and an input end outer flange 7; the vibration damping and torsion transmission assembly is arranged between one axial end face of the intermediate connecting shaft section 11 and one axial end face of the input end outer flange 7, and the input end connecting plate 3 is on the other axial end face of the input end outer flange 7. The input end connecting plate 3, the input end outer flange 7, the vibration damping and torsion transmission assembly and the intermediate connecting shaft section 11 are fastened by peripheral fasteners II; the input end shaft section 1 is fixed to the center of the axial outer side of the input end connecting plate 3 by peripheral fasteners III.

[0051] Further plans will continue to be considered. Figure 2As shown, an input end outer ring pad 8 is provided between the vibration damping and torsion transmission assembly and the axial side facing the intermediate connecting shaft section 11, and an input end inner ring pad 27 is provided in the inner ring of the input end outer ring pad 8; an input end outer ring pad 8 is provided between the vibration damping and torsion transmission assembly and the axial side facing the input end outer flange 7, and an input end inner ring pad 27 is provided in the inner ring of the input end outer ring pad 8; the input end outer ring pad 8 is provided with at least one set of axial through holes arranged in a circular array with the center as the reference, and the input end outer ring pad 8 is provided with at least one set of axial through holes arranged in a circular array with the center as the reference. The axial through holes correspond one-to-one with the axial through holes on the outer ring edge of the input end annular thin plate 4; the input end inner ring pad 27 is provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference, and the axial through holes on the input end inner ring pad 27 correspond one-to-one with the axial through holes on the inner ring edge of the input end annular thin plate 4; the input end outer ring pads 8 on both sides are fastened by peripheral fasteners II, and the input end inner ring pads 27 on both sides are fastened by peripheral fasteners I. The inner and outer ring pads play the role of pressing the annular thin plate, enhancing torsion transmission and vibration isolation.

[0052] Further plans will continue to be considered. Figure 2 As shown, the input end connecting plate 3 includes a cylindrical body I and a circular plate fixed to one axial end face of the cylindrical body I; the input end outer flange 7 includes a cylindrical body II and an annular flange a fixed to the middle of the inner circumferential surface of the cylindrical body II and extending radially inward; the intermediate connecting shaft section 11 includes a cylindrical body III and an annular flange b fixed to both ends of the outer circumferential surface of the cylindrical body III and extending radially outward; the input end connecting plate 3 and the intermediate connecting shaft section 11 are both inserted into the cylindrical body II of the input end outer flange 7, and the cylindrical body I... Both annular flange a and annular flange b are provided with at least one set of axial through holes arranged in a circumferential array with their respective centers as reference. The axial through holes on cylindrical body I, annular flange a and annular flange b are all in one-to-one correspondence with the axial through holes on the outer ring edge of the input end annular thin plate 4. The input end shaft section 1 is provided with at least one set of axial threaded holes arranged in a circumferential array with the center as reference on the axial side facing the input end connecting plate 3. The middle part of the circular plate is provided with multiple axial through holes that correspond one-to-one with the axial threaded holes.

[0053] It should be noted that, since the inner ring edge of the input end annular thin plate 4 has 12 evenly spaced inner ring bolt holes 402, and the outer ring edge of the input end annular thin plate 4 has 18 evenly spaced outer ring bolt holes 403, the input end outer ring pad 8 has 18 evenly spaced axial through holes, the input end inner ring pad 27 has 12 evenly spaced axial through holes, and the cylindrical body I, annular flange a, and annular flange b each have 18 evenly spaced axial through holes. The peripheral fastener II consists of a peripheral bolt and a matching peripheral nut, namely the input end outer ring bolt 6 and input end outer ring nut 10 indicated in the attached drawing; the peripheral fastener III consists of a peripheral bolt, namely the input end shaft section bolt 2 indicated in the attached drawing.

[0054] As explained above, the output assembly and input assembly are completely symmetrical about the central radial section of the intermediate connecting shaft. The assembly configuration of the output assembly is exactly the same as that of the input assembly. The input end of the relevant components in the attached diagram is replaced with the output end. Specifically, the output assembly includes an output outer flange 12, an output connecting plate 13, an output inner ring bolt 16, an output inner ring gasket 17, an output inner ring washer 18, an output inner ring nut 19, an output annular thin plate 20, an output damping layer 21, an output outer ring bolt 22, an output outer ring gasket 23, an output outer ring washer 24, and an output outer ring nut 25. The connection relationships of the above components are the same as those of the input assembly.

[0055] As explained above, the output shaft section 14 and the input shaft section 1 are completely symmetrical about the center radial section of the intermediate connecting shaft section. The assembly of the output shaft section 14 is completely consistent with that of the input shaft section 1, that is, the output shaft section 14 is fixed to the center of the output flange 13 by the output shaft section bolts 15.

[0056] The present invention also provides an engineering vehicle, including a frame 29, a wheel hub 30, and the aforementioned power transmission system. The motor assembly 32 and the planetary reduction gear system 31 are both fixed to the frame 29, that is, the motor assembly 32 is fixedly installed at the large end of the frame by bolts, and the planetary reduction gear system is installed at the small end of the frame. The planetary reduction gear system 31 is connected to the wheel hub 30. The power output by the motor assembly 32 is transmitted to the planetary reduction gear system 31 after being amplified and damped by an acoustic black hole effect coupling device. After being further amplified and speed-changed by the planetary reduction gear system 31, the power is output to the wheel hub 30, thereby driving the vehicle.

[0057] It should be noted that the aforementioned engineering vehicles can be mining dump trucks.

[0058] The torque transmission path and vibration transmission path of the above structure will be further explained below.

[0059] Torque transmission path: The motor assembly 32 generates torque. The output end of the motor assembly 32 is connected to the input shaft section 1 of the coupling device via a spline connection through half-shaft I. The input shaft section 1 is connected to the input connecting plate 3 by the input shaft section bolts 2. The input connecting plate 3, the input outer flange 7, the input outer ring gasket 8, the input annular thin plate 4, the input outer ring gasket 9, and the intermediate connecting shaft section 11 are connected by 18 circumferentially distributed input outer ring bolts 6. The torque is transmitted from the input end of the acoustic black hole effect coupling device through the intermediate connecting shaft section 1. The torque is transmitted to the intermediate connecting shaft section 11, the output end outer ring pad 23, the output end circular thin plate 20, the output end outer ring gasket 24, the output end outer flange 12, and the output end connecting plate 13, which are fastened together by 18 circumferentially distributed output end outer ring bolts. The output end connecting plate 13 is fastened to the output end shaft section 14 by the output end shaft section bolts 15. The other end of the output end shaft section 14 is connected to the input end of the planetary reduction gear system 31 by a spline, so as to realize the transmission of torque from the motor assembly 32 to the planetary reduction gear system 31, thereby increasing torque, reducing speed and driving the vehicle.

[0060] Vibration transmission path: Vibration is transmitted to the input end annular plate 4 via the input end shaft segment 1, input end connecting plate 3, and input end outer flange 7. The acoustic black hole structure 401 on the input end annular plate 4 and the input end damping layer 5 laid in the cut-off area can effectively dissipate the vibration energy. The dissipated vibration energy is transmitted to the intermediate connecting shaft segment 11 via the input end outer ring bolt 6, and then to the output end annular plate 20. The acoustic black hole structure 401 and the output end damping layer 21 on the output end annular plate 20 further dissipate the vibration energy. The dissipated vibration energy is transmitted to the planetary reduction gear train 31 via the output end outer flange 12, output end connecting plate 13, and output end shaft segment 14.

[0061] In summary, this invention provides a vibration damping and torsion transmission assembly, a coupling device, a power transmission system, and an engineering vehicle, achieving the following functions and effects: 1. Enhanced reliability: The shortened half-shaft length reduces the risk of breakage, and combined with the vibration suppression of the acoustic black hole-damping layer, it can extend the service life.

[0062] 2. Excellent noise reduction performance: The ring-shaped thin plate couples the acoustic black hole and damping layer structure. Multiple ring-shaped thin plates are assembled by compression. The air cavity between the ring-shaped thin plates can provide air damping. The air damping can enhance the dissipation of vibration energy by the ring-shaped thin plates, thereby improving the overall vibration reduction effect of the coupling device. Furthermore, the acoustic black hole can effectively reduce high-frequency vibration noise by concentrating vibration energy to the central cut-off area and dissipating it by the damping layer laid in the central cut-off area. This can further achieve vibration reduction and noise reduction, improve the cockpit environment and meet the requirements of mining environmental protection regulations.

[0063] 3. High-efficiency torque transmission: Multiple stainless steel ring plates are assembled together by bolts and washers to form a compact and highly flexible coupling. The two ends of the coupling are connected to the drive shaft, which can compensate for the angular, radial and axial deviations of the two shaft segments during installation, realize the displacement compensation function, and maintain the continuity of torque transmission. This improves the reliability of the coupling and enhances the overall torque transmission effect of the wheel-side reducer, making it suitable for heavy-duty climbing conditions of large-tonnage mining cars.

[0064] 4. Improved lightweight and compactness: The coupling is connected to the input flange and the output flange at both ends. The input flange and the output flange are fastened to one end of the input shaft section and the output shaft section respectively by bolts. The other end of the input shaft section and the output shaft section are connected to the motor output end and the planetary gear train input end respectively by splines. Disassembly is convenient and installation and maintenance are easy.

[0065] 5. Significant economic benefits: By coupling multiple vibration damping components, the reliability of the rear axle transmission of heavy-duty mining cars is improved compared with the traditional integrated half-shaft, avoiding the need to replace the entire half-shaft and saving costs.

[0066] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0067] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A vibration damping and torsion transmission component, characterized in that, It includes at least one annular thin plate, and one axial side of the annular thin plate is provided with at least one set of acoustic black hole structures arranged in a circular array with the center as the reference. The central cut-off region of each acoustic black hole structure is tightly fitted with a damping layer. The vibration energy is first absorbed by the elastic deformation of the annular thin plate, then guided to the damping layer by the acoustic black hole structure, and finally dissipated by the damping layer. The outer ring edge and the inner ring edge of the annular thin plate are each provided with at least one set of axial through holes arranged in a circular array with the center as the reference.

2. The vibration damping and torsion transmission assembly according to claim 1, characterized in that, When there are at least two annular thin plates, the at least two annular thin plates are stacked together coaxially and with the acoustic black hole structure in the same direction. Each adjacent annular thin plate is separated by placing several shims to form an air cavity for providing air damping. The stacked annular thin plates are fastened by the cooperation of the peripheral fastener I with the axial through hole of the inner ring edge.

3. The vibration damping and torsion transmission assembly according to claim 2, characterized in that, Between each of the two adjacent annular thin plates, there is an outer ring washer and an inner ring washer coaxial with the annular thin plate; both the outer ring washer and the inner ring washer are provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference, the axial through holes on the outer ring washer correspond one-to-one with the axial through holes on the outer ring edge of the annular thin plate, and the axial through holes on the inner ring washer correspond one-to-one with the axial through holes on the inner ring edge of the annular thin plate.

4. The vibration damping and torsion transmission assembly according to claim 1, characterized in that, The thickness of the annular thin plate is 2mm-10mm, and its material is steel; and / or, the damping layer is bonded to the acoustic black hole structure by an adhesive.

5. A coupling device, characterized in that, It includes an input shaft segment, an input assembly, an intermediate connecting shaft segment, an output assembly, and an output shaft segment arranged coaxially and fastened together in sequence; The input and output components each include the vibration damping and torsion transmission component as described in any one of claims 1 to 4.

6. A coupling device according to claim 5, characterized in that, The input assembly also includes a connecting plate and an outer flange; The vibration damping and torsion transmission assembly is arranged between one axial end face of the intermediate connecting shaft section and one axial end face of the outer flange, and the connecting plate is arranged on the other axial end face of the outer flange. The connecting plate, outer flange, vibration damping and torsion transmission assembly and intermediate connecting shaft section are fastened by peripheral fasteners II. The input end shaft segment is fixed to the center of the axial outer side of the connecting plate by a peripheral fastener III.

7. A coupling device according to claim 6, characterized in that, An outer ring pad is provided between the vibration damping and torsion transmission assembly and the axial side facing the intermediate connecting shaft section, and an inner ring pad is provided in the inner ring of the outer ring pad; an outer ring pad is provided between the vibration damping and torsion transmission assembly and the axial side facing the outer flange, and an inner ring pad is provided in the inner ring of the outer ring pad. The outer ring pad is provided with at least one set of axial through holes arranged in a circular array with the center as the reference. The axial through holes on the outer ring pad correspond one-to-one with the axial through holes on the outer ring edge of the circular thin plate. The inner ring pad is provided with at least one set of axial through holes arranged in a circumferential array with the center as the reference. The axial through holes on the inner ring pad correspond one-to-one with the axial through holes on the inner ring edge of the circular ring plate. The outer ring pads on both sides are fastened by peripheral fasteners II, and the inner ring pads on both sides are fastened by peripheral fasteners I. The inner and outer ring pads serve to press the thin ring plate, enhance torsion transmission, and isolate vibration.

8. A coupling device according to claim 6, characterized in that: The connecting plate includes a cylindrical body I and a circular plate fixed to one axial end face of the cylindrical body I; The outer flange includes a cylindrical body II and an annular flange a that is fixed to the middle of the inner circumferential surface of the cylindrical body II and extends radially inward. The intermediate connecting shaft section includes a cylindrical body III and an annular flange b that is fixed to both ends of the outer circumferential surface of the cylindrical body III and extends radially outward; The connecting disc and the intermediate connecting shaft section are both inserted into the cylindrical body II of the outer flange. The cylindrical body I, the annular flange a and the annular flange b are each provided with at least one set of axial through holes arranged in a circumferential array with their respective centers as reference. The axial through holes on the cylindrical body I, the annular flange a and the annular flange b are all corresponding one-to-one with the axial through holes on the outer ring edge of the annular thin plate. The input end shaft section has at least one set of axial threaded holes arranged in a circular array with the center as the reference on the axial side facing the connecting plate, and the middle part of the circular plate has multiple axial through holes that correspond one-to-one with the axial threaded holes.

9. A coupling device according to claim 5, characterized in that, The input and output components have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; and / or, the input and output shaft segments have the same structure and are symmetrically distributed about the central radial section of the intermediate connecting shaft segment; and / or, the intermediate connecting shaft segment is a symmetrical component with its own central radial section as a reference.

10. A power transmission system, characterized in that, include: The coupling device according to any one of claims 5 to 9; The motor assembly has its output end connected to the input shaft section of the coupling device via half-shaft I. The planetary reduction gear system has its input end connected to the output shaft of the coupling device via half shaft II. The power output from the motor assembly is transmitted to the planetary reduction gear system via the coupling device. The coupling device is used for vibration reduction and noise reduction, and the planetary reduction gear system is used to increase the torque and speed of the power before outputting it outward.

11. A power transmission system according to claim 10, characterized in that, Both the input shaft segment and the output shaft segment are provided with axially extending external splines on their outer circumferential surfaces. Both the output end of the motor assembly and the input end of the planetary reduction gear system are provided with axially extending external splines. Both half-shaft I and half-shaft II are cylindrical. The inner circumferential surfaces of both ends of the cylinder are provided with internal splines that mate with external splines. Half-shaft I is connected to the input shaft section and the output end of the motor assembly via splines. Half-shaft II is connected to the output shaft section and the input end of the planetary reduction gear system via splines.

12. An engineering vehicle, characterized in that, include: Frame and hub; In the power transmission system of claim 10 or 11, both the motor assembly and the planetary reduction gear system are fixed to the frame. The planetary reduction gear system is connected to the wheel hub, and the power output by the planetary reduction gear system is transmitted to the wheel hub to drive the wheel hub to rotate, thereby driving the vehicle.

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