Connecting rod assembly, testing method and elastic coupling

Abstract

The invention discloses a connecting rod assembly, a testing method and an elastic coupler, and belongs to the technical field of transmission, the connecting rod assembly comprises a connecting rod and a plurality of joint assemblies, the connecting rod is provided with a plurality of through holes, and each joint assembly is embedded in one through hole; the joint assembly comprises an outer bushing, an outer rubber part, a middle bushing, an inner rubber part and an inner bushing, the outer bushing is embedded in the through hole, the outer rubber part is arranged on the inner side wall of the outer bushing in a surrounding mode, the middle bushing is arranged on the inner side wall of the outer rubber part in a surrounding mode, and the inner rubber part is arranged on the inner side wall of the middle bushing in a surrounding mode; the inner bushing is arranged on the inner side wall of the inner rubber part in a surrounding mode. According to the connecting rod assembly, the joint assemblies of the connecting rod assembly are arranged to be the inner bush, the middle bush and the outer bush, meanwhile, the rubber parts are arranged between every two adjacent bushes for supporting and spacing, and at the moment, the rigidity and the torque transmission capacity of the connecting rod assembly can be obviously improved.

Description

Technical Field

[0001] This application belongs to the field of transmission technology, and particularly relates to a connecting rod assembly, a testing method, and an elastic coupling. Background Art

[0002] As an important part of the elastic coupling, the connecting rod assembly undertakes the role of transmitting power and torque. However, currently, the stiffness and torque transmission capacity of the joint components of the connecting rod assembly are relatively low and cannot meet the requirements. Summary of the Invention

[0003] Object of the Invention: The embodiments of this application provide a connecting rod assembly, aiming to solve the problem that the existing connecting rod assembly has relatively low stiffness and torque transmission capacity and cannot meet the usage requirements; another object of the embodiments of this application is to provide a testing method for testing the performance of the connecting rod assembly and improving the qualified rate of the finished connecting rod assembly; there is also an object of the embodiments of this application to provide an elastic coupling.

[0004] Technical Solution: A connecting rod assembly described in the embodiments of this application includes:

[0005] A connecting rod having a plurality of through holes;

[0006] A plurality of joint components, each of which is embedded in one of the through holes; the joint component includes:

[0007] An outer bushing embedded in the through hole;

[0008] An outer rubber part disposed around the inner sidewall of the outer bushing;

[0009] An intermediate bushing disposed around the inner sidewall of the outer rubber part;

[0010] An inner rubber part disposed around the inner sidewall of the intermediate bushing;

[0011] An inner bushing disposed around the inner sidewall of the inner rubber part.

[0012] In some embodiments,

[0013] The connecting rod includes a first end and a second end opposite to each other along the length direction;

[0014] The plurality of through holes include a first through hole and a second through hole, the first through hole is disposed at the first end, the second through hole is disposed at the second end, and the central axes of the first through hole and the second through hole are perpendicular to each other;

[0015] The plurality of joint components include:

[0016] A first joint component embedded in the first through hole;

[0017] The second joint assembly is embedded in the second through hole, and the central axes of the first joint assembly and the second joint assembly are perpendicular to each other.

[0018] In some embodiments, the first joint assembly is a spherical joint assembly, and the second joint assembly is a cylindrical joint assembly.

[0019] In some embodiments,

[0020] The outer bushing of the first joint assembly is the first bushing, and the first bushing has a plurality of first notches axially penetrating along the first joint assembly, and the plurality of first notches are arranged at intervals along the circumferential direction of the first bushing;

[0021] The intermediate bushing of the first joint assembly is the second bushing, and the second bushing has a plurality of second notches axially penetrating along the first joint assembly, and the plurality of second notches are arranged at intervals along the circumferential direction of the first bushing; each of the first notches is disposed opposite to one of the second notches;

[0022] The inner bushing of the first joint assembly is the third bushing, and the third bushing is a closed annular structure;

[0023] The outer rubber member of the first joint assembly is the first rubber member, and the first rubber member has a plurality of third notches axially penetrating along the first joint assembly, and the plurality of third notches are arranged at intervals along the circumferential direction of the first rubber member; each of the third notches communicates with one of the first notches;

[0024] The inner rubber member of the first joint assembly is the second rubber member, and the second rubber member is connected to the first rubber member.

[0025] In some embodiments,

[0026] The outer bushing of the second joint assembly is the fourth bushing, and the fourth bushing has a fourth notch axially penetrating along the second joint assembly;

[0027] The intermediate bushing of the second joint assembly is the fifth bushing, and the fifth bushing has a fifth notch axially penetrating along the second joint assembly, and the fifth notch is disposed opposite to the fourth notch;

[0028] The inner bushing of the second joint assembly is the sixth bushing, and the sixth bushing is a closed annular structure;

[0029] The outer rubber member of the second joint assembly is the third rubber member, and the third rubber member has a sixth notch axially penetrating, and the sixth notch communicates with the fourth notch;

[0030] The inner rubber part of the second joint assembly is the fourth rubber part, and the fourth rubber part is connected to the first rubber part.

[0031] In some embodiments, the first rubber part and the second rubber part are integrally connected, and the third rubber part and the fourth rubber part are integrally connected.

[0032] In some embodiments, the link assembly further includes:

[0033] A first pin sleeve, which is embedded in the inner lining sleeve of the first joint assembly;

[0034] A second pin sleeve, which is embedded in the inner lining sleeve of the second joint assembly.

[0035] In some embodiments, the outer lining sleeve, the intermediate lining sleeve and the inner lining sleeve are all metal parts. The outer rubber part is vulcanized and bonded to the inner side wall of the outer lining sleeve and the outer side wall of the intermediate lining sleeve, and the inner rubber part is vulcanized and bonded to the inner side wall of the intermediate lining sleeve and the outer side wall of the inner lining sleeve.

[0036] In some embodiments, the outer lining sleeve, the intermediate lining sleeve and the inner lining sleeve are all forged aviation aluminum alloy parts.

[0037] Correspondingly, a test method described in an embodiment of the present application uses the link assembly described in any one of the foregoing embodiments. The test method includes the following steps:

[0038] Perform a tensile test on the link assembly to obtain the force-displacement curve of the link assembly;

[0039] Based on the force-displacement curve, obtain the tensile stiffness of the link assembly.

[0040] In some embodiments, before performing the tensile test on the link assembly, it further includes:

[0041] Perform pre-tensioning on the link assembly.

[0042] In some embodiments, the pre-tensioning of the link assembly includes the following steps:

[0043] Fix the two joint assemblies of the link assembly and apply tensile forces in opposite directions to the two joint assemblies;

[0044] When the tensile force reaches the preset tensile force, obtain the initial displacement of the center distance of the two joint assemblies.

[0045] In some embodiments, the step of performing a tensile test on the link assembly to obtain the force-displacement curve of the link assembly includes the following steps:

[0046] After the pre - stretching of the connecting rod assembly is completed, release the tensile force.

[0047] Apply the tensile forces in opposite directions to the two joint assemblies at a preset speed.

[0048] When the tensile force is greater than or equal to the preset tensile force, obtain the tensile - displacement curve between the tensile force and the displacement of the center distance of the two joint assemblies of the connecting rod assembly.

[0049] Correspondingly, an elastic coupling according to an embodiment of the present application includes:

[0050] A first flange;

[0051] A plurality of connecting rod assemblies as described in any one of the foregoing embodiments, the plurality of connecting rod assemblies are arranged around the first flange, and one joint assembly of the connecting rod assembly is connected to the first flange;

[0052] A second flange, connected to the other joint assembly of the connecting rod assembly.

[0053] Advantageous effects: Compared with the prior art, a connecting rod assembly according to an embodiment of the present application includes a connecting rod and a plurality of joint assemblies. The connecting rod has a plurality of through - holes, and each joint assembly is embedded in one through - hole; the joint assembly includes an outer bushing, an outer rubber part, an intermediate bushing, an inner rubber part and an inner lining bushing. The outer bushing is embedded in the through - hole, the outer rubber part is disposed around the inner side wall of the outer bushing, the intermediate bushing is disposed around the inner side wall of the outer rubber part, the inner rubber part is disposed around the inner side wall of the intermediate bushing, and the inner lining bushing is disposed around the inner side wall of the inner rubber part. By setting the joint assembly of the connecting rod assembly into three bushings, namely the inner lining bushing, the intermediate bushing and the outer bushing, and at the same time setting rubber part support intervals between adjacent two bushings, the stiffness and torque transmission capacity of the connecting rod assembly can be significantly increased at this time.

[0054] Compared with the prior art, a test method according to an embodiment of the present application applies a connecting rod assembly as described in any one of the foregoing embodiments. The test method includes the following steps: performing a tensile test on the connecting rod assembly to obtain the tensile - displacement curve of the connecting rod assembly; based on the tensile - displacement curve, obtaining the tensile stiffness of the connecting rod assembly. By performing a tensile test on the connecting rod assembly and obtaining the tensile - displacement curve, the tensile stiffness of the connecting rod assembly can be obtained. Based on the tensile stiffness of the connecting rod assembly, it can be judged whether the performance of the connecting rod assembly meets the requirements, which is beneficial to improving the success rate of the elastic coupling and reducing the rework cost.

[0055] Compared with the prior art, an elastic coupling according to an embodiment of the present application includes a first flange, a second flange, and a plurality of link assemblies as described in any one of the foregoing embodiments. The plurality of link assemblies are arranged around the first flange, and one joint assembly of the link assembly is connected to the first flange; the second flange is connected to the other joint assembly of the link assembly. The elastic coupling of the present application includes the foregoing link assembly, and the elastic coupling can increase the angular and radial stiffness. When bearing the allowable static torque, it can produce very small torsional deformation and can produce relatively large deformation axially, so as to have strong axial displacement compensation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0057] Figure 1 is a schematic structural diagram of a link assembly according to an embodiment of the present application;

[0058] Figure 2 is a schematic structural diagram of a link according to an embodiment of the present application;

[0059] Figure 3 is a top view of a first joint assembly according to an embodiment of the present application;

[0060] Figure 4 is a cross-sectional view of a first joint assembly according to an embodiment of the present application;

[0061] Figure 5 is a top view of a second joint assembly according to an embodiment of the present application;

[0062] Figure 6 is a cross-sectional view of a second joint assembly according to an embodiment of the present application;

[0063] Figure 7 is a top view of a link assembly according to an embodiment of the present application;

[0064] Figure 8 is a front view of a link assembly according to an embodiment of the present application;

[0065] Figure 9 is a cross-sectional view of a link connected to a first joint assembly and a first pin sleeve according to an embodiment of the present application;

[0066] Figure 10 is a cross-sectional view of a link connected to a second joint assembly and a second pin sleeve according to an embodiment of the present application;

[0067] Figure 11 is the assembly flow chart of a connecting rod assembly according to an embodiment of the present application;

[0068] Figure 12 is the side view of a connecting rod assembly during a tensile test according to an embodiment of the present application;

[0069] Figure 13 is the top view of a connecting rod assembly during a tensile test according to an embodiment of the present application;

[0070] Figure 14 is the top view of an elastic coupling according to an embodiment of the present application;

[0071] Figure 15 is the cross-sectional view of an elastic coupling according to an embodiment of the present application;

[0072] Figure 16 is the flow chart of a test method for a connecting rod assembly according to an embodiment of the present application;

[0073] Figure 17 is the flow chart of pre-tensioning of a connecting rod assembly according to an embodiment of the present application;

[0074] Figure 18 is the flow chart of obtaining the force-displacement curve of a connecting rod assembly according to an embodiment of the present application.

[0075] Explanation of reference numerals:

[0076] 10. Connecting rod assembly; 100. Connecting rod; 110. Through hole; 111. First through hole; 112. Second through hole; 120. First end; 130. Second end; 200. Joint assembly; 210. Outer bushing; 220. Outer rubber part; 230. Intermediate bushing; 240. Inner rubber part; 250. Inner lining bushing; 300. First joint assembly; 310. First bushing; 311. First notch; 320. Second bushing; 321. Second notch; 330. Third bushing; 340. First rubber part; 341. Third notch; 350. Second rubber part; 400. Second joint assembly; 410. Fourth bushing; 411. Fourth notch; 420. Fifth bushing; 421. Fifth notch; 430. Sixth bushing; 440. Third rubber part; 441. Sixth notch; 450. Fourth rubber part; 500. First pin sleeve; 600. Second pin sleeve; 20. First flange; 30. Second flange; 40. Tensile end; 50. Special tooling. Detailed implementation manners

[0077] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0078] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, and "at least one" means one, two or more, unless otherwise specifically defined. In the description of the present application, "vertical" means completely vertical at 90° or almost completely vertical. For example, within the range of an included angle of 80° to 100°, it is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel. For example, within a range of 10° of complete parallelism, it is considered parallel.

[0079] As an important transmission element, a coupling can be used to connect the driving end and the driven end of a shafting, and play the role of transmitting torque and rotational speed, as well as damping and shock resistance, and is widely used in transmission equipment. With the development of modern transmission systems towards large torque and high power, the requirements for the compensation ability and load-bearing capacity of the coupling by the shafting are also gradually increasing.

[0080] Among various couplings, the elastic link 100 coupling connects the driving end and the driven end of the coupling by a link assembly 10 distributed circumferentially, transmits torque and provides displacement compensation ability. The link assembly 10, as the most important component in the elastic link 100 coupling, undertakes the role of transmitting power and torque. However, due to its relatively complex structure and involving the assembly of metal parts and rubber parts, it is easy to cause damage to the rubber parts during assembly, and the production qualification rate is relatively low.

[0081] In view of this, the embodiments of the present application provide a link assembly 10, aiming to solve the above problems.

[0082] Please participate Figure 1, a connecting rod assembly 10 according to an embodiment of the present application includes a connecting rod 100 and a plurality of joint assemblies 200. The connecting rod 100 has a plurality of through holes 110, and each joint assembly 200 is embedded in one through hole 110; the joint assembly 200 includes an outer bushing 210, an outer rubber member 220, an intermediate bushing 230, an inner rubber member 240, and an inner lining bushing 250. The outer bushing 210 is embedded in the through hole 110, the outer rubber member 220 is disposed around the inner side wall of the outer bushing 210, the intermediate bushing 230 is disposed around the inner side wall of the outer rubber member 220, the inner rubber member 240 is disposed around the inner side wall of the intermediate bushing 230, and the inner lining bushing 250 is disposed around the inner side wall of the inner rubber member 240.

[0083] In the embodiment of the present application, by setting the joint assembly 200 of the connecting rod assembly 10 into three bushings, namely the inner lining bushing 250, the intermediate bushing 230, and the outer bushing 210, and at the same time setting a rubber member support interval between two adjacent bushings, the stiffness and torque transmission capacity of the connecting rod assembly 10 can be significantly increased at this time.

[0084] In the embodiment of the present application, the joint assembly 200 is disposed in the through hole 110 and is connected to the connecting rod 100 in an interference fit manner. That is, when the joint assembly 200 is not assembled in the through hole 110, the outer diameter of the joint assembly 200 is slightly larger than the inner diameter of the through hole 110. In this way, after the joint assembly 200 is assembled into the through hole 110, the joint assembly 200 is embedded in the through hole 110, and the outer side wall of the joint assembly 200 abuts against the inner side wall of the through hole 110.

[0085] Specifically, in the embodiment of the present application, the inner lining bushing 250 of the joint assembly 200 is used for mating connection with a pin bushing, and the outer bushing 210 is used for interference fit connection with the inner side wall of the through hole 110. An outer rubber member 220 is disposed between the inner lining bushing 250 and the intermediate bushing 230, and an inner rubber member 240 is disposed between the intermediate bushing 230 and the inner lining bushing 250. When the joint assembly 200 is assembled and connected to the connecting rod 100, the deformation of the outer bushing 210 and the intermediate bushing 230 is absorbed by the outer rubber member 220 and the inner rubber member 240, so as to maintain the structural stability of the inner lining bushing 250; at the same time, the tension force generated by intersecting to overcome the deformation is used to cooperate with the connecting rod 100 for fixation.

[0086] It should be noted that in the present application, by disposing the intermediate bushing 230 between the inner lining bushing 250 and the outer bushing 210 and separating them by the inner rubber member 240 and the outer rubber member 220, the tensile stiffness and torque transmission capacity of the joint assembly 200 can be effectively increased.

[0087] It should be noted that in this application, by arranging an intermediate bushing 230 between the inner bushing 250 and the outer bushing 210 and setting rubber parts between adjacent bushings, on the one hand, the buffering and shock absorption performance can be enhanced. Specifically, such a structure forms a more multi-stage buffering structure. When the joint assembly 200 is subjected to vibration or impact, the external force is first transmitted from the outer bushing 210 to the intermediate bushing 230. The intermediate bushing 230 absorbs part of the energy through the deformation of the rubber part, and then transmits the remaining force to the inner bushing 250. The rubber part between the inner bushing 250 and the intermediate bushing 230 further absorbs energy. Compared with the structure with only one layer of rubber part, this multi-stage buffering structure can more effectively disperse and consume vibration energy, thereby better protecting the connected equipment parts and reducing the wear and failure of the equipment.

[0088] It should also be noted that the special structural design of the joint assembly 200 in this application can also improve the displacement compensation ability. The presence of the intermediate bushing 230 makes the displacement compensation of the joint assembly 200 more flexible in different directions. For example, when relative displacement occurs between two axes, the rubber part between the outer bushing 210 and the intermediate bushing 230 can adapt to radial displacement to a certain extent, and the rubber part between the intermediate bushing 230 and the inner bushing 250 can better cope with axial displacement or angular displacement. In contrast, the structure with only the inner bushing 250 and the outer bushing 210 may not provide sufficient flexibility and compensation ability in complex displacement situations.

[0089] It should also be noted that the structure of the three bushings in this application increases the overall strength and stiffness of the joint assembly 200 and can withstand greater torque and force. The intermediate bushing 230 shares part of the load, making the pressure borne by each rubber part relatively reduced, reducing the fatigue wear speed of the rubber parts, and extending the service life of the joint assembly 200. At the same time, this structure can also better resist the deformation caused by torque transmission and ensure the stable operation of the coupling under high-load working conditions.

[0090] It should also be noted that the intermediate bushing 230 divides the rubber part into two parts, making the force on the rubber part more uniform and reducing the phenomenon of local stress concentration.

[0091] Please refer to Figure 2 、 Figure 7 and Figure 8, in some embodiments, the connecting rod 100 includes a first end 120 and a second end 130 that are opposite to each other along the length direction; the plurality of through holes 110 include a first through hole 111 and a second through hole 112. The first through hole 111 is disposed at the first end 120, and the second through hole 112 is disposed at the second end 130. The central axes of the first through hole 111 and the second through hole 112 are perpendicular to each other; the plurality of joint assemblies 200 include a first joint assembly 300 and a second joint assembly 400. The first joint assembly 300 is embedded in the first through hole 111, and the second joint assembly 400 is embedded in the second through hole 112. The central axes of the first joint assembly 300 and the second joint assembly 400 are perpendicular to each other.

[0092] In the embodiments of the present application, by providing the first through hole 111 at the first end 120 of the connecting rod 100 to assemble the first joint assembly 300, and by providing the second through hole 112 at the second end 130 of the connecting rod 100 to assemble the second joint assembly 400, and the central axes of the first through hole 111 and the second through hole 112 are perpendicular to each other, and the central axes of the first joint assembly 300 and the second joint assembly 400 are perpendicular to each other. At this time, after the connecting rod assembly 10 is assembled into a coupling, it can provide axial, angular, and radial displacement compensation capabilities for the coupling. At the same time, since both the first joint assembly 300 and the second joint assembly 400 are provided with the intermediate bushing 230 and two rubber parts, the connecting rod assembly 10 can have strong tensile stiffness and torque transmission ability.

[0093] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 , in some embodiments, the first joint assembly 300 is a spherical joint assembly 200, and the second joint assembly 400 is a cylindrical joint assembly 200.

[0094] In the embodiments of the present application, by setting the first joint assembly 300 as a spherical joint assembly 200, the first joint assembly 300 is realized to have degrees of freedom in multiple directions, which can allow, to a certain extent, the two shafts connected by the coupling equipped with the connecting rod assembly 10 to have deviations in the radial, axial, and angular directions, and can compensate for large angular displacements and small amounts of radial displacements between the two shafts, so that the coupling can still work normally when connecting two non-concentric shafts, and reduce the additional loads and vibrations caused by misalignment. At the same time, its spherical contact method can absorb and buffer vibration energy to a certain extent, reduce the impact of vibration and shock on the equipment, and improve the stability and reliability of the equipment. In addition, when transmitting torque, it can evenly transmit the torque from the driving shaft to the driven shaft through its own structure, and at the same time adapt to the relative movement between the two shafts to ensure the smoothness of torque transmission.

[0095] In this application, the second joint assembly 400 is set as the cylindrical joint assembly 200. On the one hand, when the connecting rod assembly 10 is installed in the coupling, it can compensate for the axial displacement, allowing a certain amount of telescopic change in the axial direction of the two shafts, and adapting to the axial dimension changes caused by factors such as thermal expansion and installation errors during the operation of the equipment. On the other hand, it can also play a certain buffering role through its own elastic deformation. Especially for the vibration and impact along the axial direction, it can effectively relieve their transmission and protect the connected equipment components. At the same time, the cylindrical joint assembly 200 mainly undertakes the axial torque transmission and works together with the spherical joint assembly 200 to ensure that the coupling can efficiently and reliably transmit torque under different working conditions, enabling the equipment to operate normally.

[0096] Please refer to Figure 3 and Figure 4 , in some embodiments, the outer bushing 210 of the first joint assembly 300 is the first bushing 310, the first bushing 310 has a plurality of first notches 311 penetrating along the axial direction of the first joint assembly 300, and the plurality of first notches 311 are arranged at intervals along the circumferential direction of the first bushing 310; the intermediate bushing 230 of the first joint assembly 300 is the second bushing 320, the second bushing 320 has a plurality of second notches 321 penetrating along the axial direction of the first joint assembly 300, and the plurality of second notches 321 are arranged at intervals along the circumferential direction of the first bushing 310; each first notch 311 is arranged opposite to a second notch 321; the inner bushing 250 of the first joint assembly 300 is the third bushing 330, and the third bushing 330 is a closed ring structure; the outer rubber part 220 of the first joint assembly 300 is the first rubber part 340, the first rubber part 340 has a plurality of third notches 341 penetrating along the axial direction of the first joint assembly 300, and the plurality of third notches 341 are arranged at intervals along the circumferential direction of the first rubber part 340; each third notch 341 communicates with a first notch 311; the inner rubber part 240 of the first joint assembly 300 is the second rubber part 350, and the second rubber part 350 is connected to the first rubber part 340.

[0097] In the embodiments of this application, by setting the first notch 311 and the second notch 321 to be arranged opposite to each other, and the third notch 341 of the first rubber part 340 communicating with the first notch 311, it can be understood that the first notch 311, the second notch 321 and the third notch 341 are in the same radial direction. At this time, it is convenient to improve the flexibility and deformation ability of the first joint assembly 300, and greater deformation can occur at the notch when the first joint assembly 300 is assembled into the first through hole 111, thereby increasing the flexibility of the first joint assembly 300 and facilitating installation and disassembly. At the same time, when the coupling is stressed, the joint assembly 200 can adapt to the relative movement of the two shafts through deformation, reducing the stress concentration caused by displacement.

[0098] In the embodiments of the present application, for the spherical first joint assembly 300, since the relative thickness of the bushing is relatively thick and the deformation ability is not high, a plurality of corresponding first notches 311, second notches 321 and third notches 341 are provided, which can improve the deformation ability of the first joint assembly 300, thereby improving the buffering and damping effect. In addition, the plurality of notches enable the spherical joint assembly 200 to have a greater degree of freedom of deformation in different directions. When complex relative displacements occur between the two shafts, such as a combination of angular displacements, radial displacements and axial displacements at multiple angles, these notches can produce corresponding deformations at different positions and directions, so as to more comprehensively and effectively compensate for various displacements, ensuring that the coupling can adapt to various complex working conditions. At the same time, the plurality of notches can disperse the stress borne by the spherical joint assembly 200 to multiple parts, thereby reducing the material fatigue, cracks or even fractures of the joint assembly 200 caused by excessive local stress, and improving the reliability and service life of the spherical joint assembly 200.

[0099] Please refer to Figure 5 and Figure 6 , in some embodiments, the outer bushing 210 of the second joint assembly 400 is a fourth bushing 410, and the fourth bushing 410 has a fourth notch 411 penetrating along the axial direction of the second joint assembly 400; the intermediate bushing 230 of the second joint assembly 400 is a fifth bushing 420, and the fifth bushing 420 has a fifth notch 421 penetrating along the axial direction of the second joint assembly 400, and the fifth notch 421 is disposed opposite to the fourth notch 411; the inner bushing 250 of the second joint assembly 400 is a sixth bushing 430, and the sixth bushing 430 is a closed annular structure; the outer rubber member 220 of the second joint assembly 400 is a third rubber member 440, and the third rubber member 440 has a sixth notch 441 penetrating along the axial direction, and the sixth notch 441 communicates with the fourth notch 411; the inner rubber member 240 of the second joint assembly 400 is a fourth rubber member 450, and the fourth rubber member 450 is connected to the first rubber member 340.

[0100] In the embodiments of the present application, by setting the fourth notch 411 and the fifth notch 421 to be opposite to each other and the sixth notch 441 to communicate with the fourth notch 411, it can be understood that the fourth notch 411, the fifth notch 421 and the sixth notch 441 are in the same radial direction. At this time, it is convenient to improve the flexibility and deformation ability of the second joint assembly 400, and greater deformation can occur at the notch when the second joint assembly 400 is assembled into the second through hole 112, thereby increasing the flexibility of the second joint assembly 400 and facilitating installation and disassembly. At the same time, when the coupling is stressed, the joint assembly 200 can deform to adapt to the relative movement of the two shafts, reducing the stress concentration caused by displacement.

[0101] In some embodiments, the first rubber member 340 and the second rubber member 350 are integrally connected, and the third rubber member 440 and the fourth rubber member 450 are integrally connected.

[0102] In the embodiments of the present application, the integrally connected rubber members can directly inject the fluid rubber after rubber refining, plasticizing, and mixing during the production of the joint assembly 200, and directly bond it to the side walls of two adjacent bushings through a vulcanization process, forming the connection and fixation between the adjacent bushings and the rubber members. This structure facilitates the production of the joint assembly 200 and is conducive to improving the production efficiency of the joint assembly 200.

[0103] It should be noted that in the embodiments of the present application, during the production of the joint assembly 200, the outer bushing 210, the intermediate bushing 230, and the inner bushing 250 are pre-placed on the production carrier, and then rubber injection and vulcanization are performed, reducing the rubber member assembly steps and improving the production efficiency of the joint assembly 200.

[0104] Please refer to Figure 9 and Figure 10 , in some embodiments, the link assembly 10 further includes a first pin bushing 500 and a second pin bushing 600. The first pin bushing 500 is embedded in the inner bushing 250 of the first joint assembly 300, and the second pin bushing 600 is embedded in the inner bushing 250 of the second joint assembly 400.

[0105] In the embodiments of the present application, by providing the first pin bushing 500 and the second pin bushing 600, the fixed pins on the corresponding flange plates are used for mating connection to achieve the fixation of both ends of the link assembly 10.

[0106] In some embodiments, the outer bushing 210, the intermediate bushing 230, and the inner bushing 250 are all metal parts. The outer rubber member 220 is vulcanized and bonded to the inner side wall of the outer bushing 210 and the outer side wall of the intermediate bushing 230, and the inner rubber member 240 is vulcanized and bonded to the inner side wall of the intermediate bushing 230 and the outer side wall of the inner bushing 250.

[0107] In the embodiments of the present application, the outer bushing 210, the intermediate bushing 230, and the inner bushing 250 are all metal parts. At this time, it can ensure that the joint assembly 200 has sufficient structural strength and stiffness, and can ensure the tensile stiffness of the link assembly 10 during the application of the link assembly 10. At the same time, the joint assembly 200 can have a long service life. By using the vulcanization process to adhesively connect the outer rubber part 220 with the outer bushing 210 and the intermediate bushing 230, and adhesively connect the inner rubber part 240 with the intermediate bushing 230 and the inner bushing 250, the bonding strength between the rubber part and the metal bushing can be effectively improved. During the vulcanization process, the rubber molecules will undergo a cross-linking reaction to form a three-dimensional network structure, and at the same time form a tight chemical bond and physical embedding with the surface of the bushing. This bonding method can provide a very high bonding strength, enabling the rubber and the bushing to withstand large external forces and torques, and it is not easy to occur the phenomenon of degumming, ensuring the reliability and stability of the joint assembly 200. The vulcanization process can form a good sealing effect between the rubber and the bushing. During the vulcanization process, the rubber will fill the tiny pores and unevenness on the surface of the bushing to form a tight fit, effectively preventing external media such as dust, moisture, and oil from invading the inside of the joint assembly 200, avoiding corrosion and damage to the internal structure, and at the same time preventing the leakage of the internal lubricating medium, ensuring the normal operation of the joint assembly 200. The bonding interface between the rubber and the bushing after over-vulcanization treatment also has better anti-aging performance. The structure of the vulcanized rubber is more stable, which can resist the influence of factors such as oxidation, ultraviolet rays, and heat, slow down the aging speed of the rubber, and extend the service life of the joint assembly 200. The vulcanization process can control the forming size and shape of the rubber to a certain extent, making its fit with the bushing more precise. During the vulcanization process, the rubber will be cured and formed according to the shape and size of the mold, and can accurately fill specific parts of the bushing, ensuring the overall dimensional accuracy and stability of the joint assembly 200.

[0108] In some embodiments, the outer bushing 210, the intermediate bushing 230, and the inner bushing 250 are all forged aviation aluminum alloy parts.

[0109] In the embodiments of the present application, the bushing and the link 100 are both machined from forged aviation aluminum alloy parts, which are light in weight. While ensuring the strength, a weight reduction design is also carried out, which is also beneficial to reducing the overall weight of the coupling.

[0110] In the embodiment of the present application, the raw material of the connecting rod 100 in the connecting rod assembly 10 is forged aviation aluminum alloy, which is machined by a CNC machining center. After the dimensional inspection is qualified, the connecting rod 100 is subjected to hard anodizing surface treatment to improve the wear resistance and corrosion resistance of the connecting rod 100. After the machining of the metal parts of the spherical first joint assembly 300 and the cylindrical second joint assembly 400 in the connecting rod assembly 10 is completed, they are subjected to sandblasting and sizing surface treatment. After the rubber is kneaded, plasticized, and mixed, the rubber is bonded to the surface of the joint metal parts through a vulcanization process. Subsequently, the flash of the product is trimmed and polished, and the production of the joint assembly 200 is completed. After the dimensional inspection of the joint assembly 200 is qualified, it is connected to the connecting rod 100 to assemble the connecting rod assembly 10. The specific assembly process is as Figure 11 shown. First, prepare a special tooling 50, apply an external force to first assemble the joint assembly 200 into the special tooling 50 to reduce the outer diameter of the joint assembly 200, then align the special tooling 50 with the through hole 110 on the joint assembly 200, apply an external force to transfer the joint assembly 200 from the special tooling 50 into the through hole 110, and then apply an external force to assemble the pin sleeve into the inner lining sleeve 250 of the joint assembly 200 to complete the assembly of the connecting rod assembly 10. Specifically, the first joint assembly 300 can be pressed into the first through hole 111 of the connecting rod 100, the second joint assembly 400 can be pressed into the second through hole 112 of the connecting rod 100, then the first pin sleeve 500 can be pressed into the inner lining sleeve 250 of the first joint assembly 300, and the second pin sleeve 600 can be pressed into the inner lining sleeve 250 of the second joint assembly 400. After the assembly dimensional inspection is qualified, the factory test of the connecting rod assembly 10 is carried out.

[0111] Please refer to Figure 12 、 Figure 13 and Figure 16 . Correspondingly, a test method for the embodiment of the present application uses the connecting rod assembly 10 in any one of the foregoing embodiments, and is mainly used to test the tensile stiffness performance of the connecting rod assembly 10. The test method includes the following steps:

[0112] S200: Conduct a tensile test on the connecting rod assembly 10 to obtain the force-displacement curve of the connecting rod assembly 10.

[0113] S300: Based on the force-displacement curve, obtain the tensile stiffness of the connecting rod assembly 10.

[0114] In the present application, by conducting a tensile test on the connecting rod assembly 10, the force-displacement curve is obtained, and thus the tensile stiffness of the connecting rod assembly 10 is obtained. Based on the tensile stiffness of the connecting rod assembly 10, it can be judged whether the performance of the connecting rod assembly 10 meets the requirements, which is beneficial to improving the success rate of the elastic coupling and reducing the rework cost.

[0115] In some embodiments, before conducting the tensile test on the connecting rod assembly 10, it further includes:

[0116] S100: Pre-tension the connecting rod assembly 10.

[0117] Please refer to Figure 17 , in some embodiments, pre-tensioning the connecting rod assembly 10 includes the following steps:

[0118] S110: Fix the two joint assemblies 200 of the connecting rod assembly 10 and apply tensile forces in opposite directions to the two joint assemblies 200;

[0119] S120: When the tensile force reaches the preset tensile force, obtain the initial displacement of the center distance between the two joint assemblies 200.

[0120] Please refer to Figure 18 , in some embodiments, step S200: Conduct a tensile test on the connecting rod assembly 10 to obtain the tensile force-displacement curve of the connecting rod assembly 10 specifically includes the following steps:

[0121] S210: After the connecting rod assembly 10 is pre-tensioned, release the tensile force;

[0122] S220: Apply tensile forces in opposite directions to the two joint assemblies 200 at a preset speed;

[0123] S230: When the tensile force is greater than or equal to the preset tensile force, obtain the tensile force-displacement curve between the tensile force and the displacement of the center distance between the two joint assemblies 200 of the connecting rod assembly 10.

[0124] In the embodiments of the present application, the test method for the tensile stiffness of the connecting rod assembly 10 is as follows: According to the allowable maximum torque of the coupling and the distribution radius of the connecting rod assembly 10, the maximum tensile force received by the connecting rod assembly 10 during operation can be obtained. At this time, set this maximum tensile force as the corresponding preset tensile force. Fix the two ends of the connecting rod assembly 10 to the two tensile ends 40 on the tensile testing machine and conduct a tensile test on the connecting rod assembly 10. Among them, when the connecting rod assembly 10 is installed and fixed, ensure that the center line of the connecting rod assembly 10 is vertical. When conducting the test, first conduct a pre-tension test, apply the preset tensile force to both ends of the connecting rod assembly 10, stop and release the force after reaching the preset tensile force. After stopping, record the initial displacement of the center distance of the joint assemblies 200 at both ends as the initial position. Then conduct a positive-time tensile test. The positive-time tensile test is: After the test loading force returns to zero, apply a tensile force to both ends of the connecting rod assembly 10 at a preset speed. When the tensile force is greater than or equal to the preset tensile force, end the test. The tensile testing machine automatically records the data and the tensile force-displacement curve and forms a tensile force-displacement curve report. According to the tensile force-displacement curve obtained from the test, calculate the slope to obtain its tensile stiffness.

[0125] In the embodiment of the present application, the tensile stiffness of the connecting rod assembly 10 is positively correlated with the hardness of the rubber parts in the joint assembly 200. After determining the tensile stiffness required for the trial-produced connecting rod assembly 10, based on the results of the tensile test, if the tensile stiffness needs to be adjusted, the hardness of the rubber in the joint assembly 200 can be adjusted, and re-vulcanization, pressing, and tensile testing can be performed until the connecting rod assembly 10 reaches the required stiffness.

[0126] It should be noted that the embodiment of the present application performs a tensile test on a single connecting rod assembly 10, rather than performing a tensile test after the coupling is assembled, which is more efficient and cost-effective overall. The tooling structure used for the tensile test in the present application is relatively simple, and only requires setting a locating pin joint on the two tensile sections of the tensile tester, which can be fixed to the corresponding pin sleeve for tensile testing.

[0127] It should also be noted that the preset speed in the embodiment of the present application can be a speed less than 5 meters per second, and specifically can be any one of 1, 2, 3, 4, 5 or a range value between any two values.

[0128] The preset tension in the embodiment of the present application can be determined according to the allowable maximum torque of the coupling and the corresponding distribution radius of the connecting rod assembly 10.

[0129] Correspondingly, such as Figure 14 and Figure 15 As shown, an embodiment of the present application also provides an elastic coupling, including a first flange 20, a second flange 30 and a plurality of connecting rod assemblies 10 as in any one of the aforementioned embodiments, the plurality of connecting rod assemblies 10 are arranged around the first flange 20, a joint assembly 200 of the connecting rod assembly 10 is connected to the first flange 20; the second flange 30 is connected to another joint assembly 200 of the connecting rod assembly 10.

[0130] The elastic coupling of the present application includes the aforementioned connecting rod assembly 10, which can increase the angular and radial stiffness of the elastic coupling, produce very small torsional deformation when subjected to static torsional torque within the allowable range, and can produce larger deformation in the axial direction, thereby having a stronger axial displacement compensation capability.

[0131] In the embodiment of the present application, the first flange 20 is used to connect one shaft, the second flange 30 is used to connect another shaft, and a plurality of connecting rod assemblies 10 are used to connect the first flange 20 and the second flange 30 .

[0132] In the embodiment of the present application, the elastic coupling includes multiple connecting rod assemblies 10. If the performance verification test is performed after the elastic coupling is assembled, if the performance verification fails, the connecting rod assembly 10 needs to be replaced, which takes a lot of time and installation costs. Therefore, it is more efficient and less costly to perform a performance verification test on a single connecting rod assembly 10 before assembling it.

[0133] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0134] The above has introduced in detail a connecting rod assembly, a testing method and an elastic coupling provided by the embodiments of the present application, and specific examples have been used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connecting rod assembly, characterized in that: include: A connecting rod (100) having a plurality of through holes (110); A plurality of joint components (200), each of the joint components (200) being embedded in one of the through holes (110); the joint components (200) comprising: An outer bushing (210) is embedded in the through hole (110); An outer rubber member (220) is disposed around the inner side wall of the outer bushing (210); An intermediate bushing (230) is disposed around the inner wall of the outer rubber member (220); An inner rubber member (240) is disposed around the inner side wall of the middle bushing (230); An inner bushing (250) is disposed around the inner wall of the inner rubber component (240).

2. The connecting rod assembly according to claim 1, characterized in that: The connecting rod (100) comprises a first end (120) and a second end (130) which are opposite to each other along the length direction; The plurality of through holes (110) include a first through hole (111) and a second through hole (112), wherein the first through hole (111) is arranged at the first end (120), and the second through hole (112) is arranged at the second end (130), and central axes of the first through hole (111) and the second through hole (112) are perpendicular to each other; A plurality of joint assemblies (200) comprises: A first joint component (300) is embedded in the first through hole (111); The second joint component (400) is embedded in the second through hole (112), and the central axes of the first joint component (300) and the second joint component (400) are perpendicular to each other.

3. The connecting rod assembly according to claim 2, characterized in that: The first joint component (300) is a spherical joint component (200), and the second joint component (400) is a cylindrical joint component (200).

4. The connecting rod assembly according to claim 3, characterized in that: The outer bushing (210) of the first joint component (300) is a first bushing (310), and the first bushing (310) has a plurality of first notches (311) penetrating the first joint component (300) in an axial direction, and the plurality of first notches (311) are arranged at intervals along the circumference of the first bushing (310); The middle bushing (230) of the first joint assembly (300) is a second bushing (320), and the second bushing (320) has a plurality of second notches (321) penetrating along the axial direction of the first joint assembly (300), and the plurality of second notches (321) are arranged at intervals along the circumference of the first bushing (310); each of the first notches (311) is arranged opposite to one of the second notches (321); The inner bushing (250) of the first joint assembly (300) is a third bushing (330), and the third bushing (330) is a closed annular structure; The outer rubber member (220) of the first joint component (300) is a first rubber member (340), the first rubber member (340) having a plurality of third notches (341) penetrating the first joint component (300) in an axial direction, the plurality of third notches (341) being arranged at intervals in a circumferential direction of the first rubber member (340); each of the third notches (341) is in communication with one of the first notches (311); The inner rubber component (240) of the first joint assembly (300) is a second rubber component (350), and the second rubber component (350) is connected to the first rubber component (340).

5. The connecting rod assembly according to claim 4, characterized in that: The outer bushing (210) of the second joint component (400) is a fourth bushing (410), and the fourth bushing (410) has a fourth notch (411) penetrating along the axial direction of the second joint component (400); The middle bushing (230) of the second joint assembly (400) is a fifth bushing (420), the fifth bushing (420) having a fifth notch (421) penetrating along the axial direction of the second joint assembly (400), the fifth notch (421) being arranged opposite to the fourth notch (411); The inner bushing (250) of the second joint assembly (400) is a sixth bushing (430), and the sixth bushing (430) is a closed annular structure; The outer rubber component (220) of the second joint assembly (400) is a third rubber component (440), and the third rubber component (440) has a sixth notch (441) penetrating along the axial direction, and the sixth notch (441) is connected to the fourth notch (411); The inner rubber component (240) of the second joint assembly (400) is a fourth rubber component (450), and the fourth rubber component (450) is connected to the first rubber component (340).

6. The connecting rod assembly according to claim 5, characterized in that: The first rubber component (340) and the second rubber component (350) are connected in one piece, and the third rubber component (440) and the fourth rubber component (450) are connected in one piece.

7. The connecting rod assembly according to claim 2, characterized in that: The connecting rod assembly (10) further comprises: A first pin sleeve (500) is embedded in the inner sleeve (250) of the first joint assembly (300); The second pin sleeve (600) is embedded in the inner sleeve (250) of the second joint assembly (400).

8. The connecting rod assembly according to claim 1, characterized in that: The outer bushing (210), the middle bushing (230) and the inner bushing (250) are all metal parts. The outer rubber part (220) is vulcanized and bonded to the inner wall of the outer bushing (210) and the outer wall of the middle bushing (230). The inner rubber part (240) is vulcanized and bonded to the inner wall of the middle bushing (230) and the outer wall of the inner bushing (250).

9. The connecting rod assembly according to claim 8, characterized in that: The outer bushing (210), the middle bushing (230) and the inner bushing (250) are all forged aviation aluminum alloy parts.

10. A testing method, characterized in that: Applied to the connecting rod assembly (10) according to any one of claims 1 to 9, the testing method comprises the following steps: Performing a tensile test on the connecting rod assembly (10) to obtain a tension-displacement curve of the connecting rod assembly (10); Based on the tension-displacement curve, the tensile stiffness of the connecting rod assembly (10) is obtained.

11. The testing method according to claim 10, characterized in that: Before the tensile test is performed on the connecting rod assembly (10), the method further comprises: The connecting rod assembly (10) is pre-stretched.

12. The testing method according to claim 11, characterized in that: The pre-stretching of the connecting rod assembly (10) comprises the following steps: Fixing the two joint assemblies (200) of the connecting rod assembly (10), and applying pulling forces in opposite directions to the two joint assemblies (200); When the pulling force reaches a preset pulling force, the initial displacement of the center distance between the two joint components (200) is obtained.

13. The testing method according to claim 12, characterized in that: The tensile test is performed on the connecting rod assembly (10) to obtain a tension-displacement curve of the connecting rod assembly (10), comprising the following steps: After the connecting rod assembly (10) has completed pre-stretching, releasing the tension; Applying the pulling forces in opposite directions to the two joint components (200) at a preset speed; When the pulling force is greater than or equal to the preset pulling force, a pulling force-displacement curve between the pulling force and the displacement of the center distance between the two joint assemblies (200) of the connecting rod assembly (10) is obtained.

14. An elastic coupling, characterized in that: include: A first flange (20); A plurality of connecting rod assemblies (10) according to any one of claims 1 to 9, wherein the plurality of connecting rod assemblies (10) are arranged around the first flange (20), and one of the joint assemblies (200) of the connecting rod assemblies (10) is connected to the first flange (20); The second flange (30) is connected to the other joint assembly (200) of the connecting rod assembly (10).

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