Testing device

Abstract

The utility model discloses a testing device. The testing device comprises a rack; the transmission shaft is rotatably arranged on the rack; the friction disc is hollowly sleeved on the transmission shaft and is connected with the rack; the damping fin is sleeved and fixed on the transmission shaft; the limiting structure is fixed to the transmission shaft and located on the side, away from the friction disc, of the damping fin. The elastic piece is located between the damping fin and the limiting structure and used for driving the damping fin to move towards the friction disc so as to abut against the friction disc; the driving motor is arranged on the rack, and an output shaft of the driving motor is connected with the transmission shaft, located on the side, away from the damping fin, of the friction disc and used for driving the transmission shaft to rotate. According to the testing device provided by the utility model, the development cycle of the torsion damper can be effectively shortened, the development risk is reduced, the development and manufacturing cost is saved, and the verification cycle and resources of a whole vehicle and a rack are reduced, so that the development and verification cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a testing device. Background Art

[0002] In the related art, since hybrid vehicles need to frequently switch between working conditions such as pure electric, range extender, and direct drive, it is easy to generate jitter and knocking noises. Therefore, as an important vibration damping component, the stability of the damping value of the torsional damper is an important guarantee for the consistency of NVH (noise, vibration, and harshness) throughout the vehicle life cycle.

[0003] At present, the damping value of the torsional damper needs to be adjusted through a large number of vehicle and bench tests. At the same time, there are also repeated modifications to the damping scheme, resulting in the trimming or even re-opening of manufacturing molds, high development costs, large resource requirements and long cycles for bench and vehicle verification. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a testing device, which can effectively shorten the development cycle of the torsional damper, reduce the development risk, save the development and manufacturing costs, reduce the vehicle and bench verification cycles and resources, and thus reduce the development and verification costs.

[0005] The testing device according to the embodiment of the utility model includes: a bench; a transmission shaft rotatably arranged on the bench; a friction disk sleeved on the transmission shaft loosely and connected with the bench; a damping plate sleeved and fixed on the transmission shaft; a limiting structure fixed on the transmission shaft, and the limiting structure is located on the side of the damping plate away from the friction disk; an elastic member located between the damping plate and the limiting structure for driving the damping plate to move towards the friction disk to abut against the friction disk; a driving motor arranged on the bench, and an output shaft of the driving motor is connected with the transmission shaft and is located on the side of the friction disk away from the damping plate for driving the transmission shaft to rotate.

[0006] For the testing device according to the embodiment of the utility model, by first testing the change of the damping value in the cooperation between the damping plate, the friction disk, the elastic member and the limiting structure, quickly finding out the boundary at which the damping value reaches stability, and then assembling the damping plate, the friction disk, the elastic member and the limiting structure that pass the test and meet the damping stability requirements onto the torsional damper, it is realized that the change range of the damping value throughout the life cycle can be judged at the initial stage of the design of the torsional damper, effectively shortening the development cycle, reducing the development risk, saving the development and manufacturing costs, reducing the vehicle and bench verification cycles and resources, and thus reducing the development and verification costs.

[0007] In addition, the testing device according to the present utility model may further have the following additional technical features:

[0008] In some embodiments, a limiting boss is provided on one of the damping sheet and the limiting structure, and a limiting hole matching the limiting boss is provided on the other.

[0009] In some embodiments, the limiting bosses are multiple and are arranged at intervals along the circumferential direction of the transmission shaft, and the limiting holes are multiple and correspond to the multiple limiting bosses one by one.

[0010] In some embodiments, the elastic member is sleeved on the transmission shaft, and the elastic member has an avoidance groove for avoiding the limiting boss. The multiple avoidance grooves are arranged at intervals along the circumferential direction of the elastic member, and the number of the avoidance grooves is an integer multiple of the number of the limiting bosses.

[0011] In some embodiments, a positioning protrusion is provided on the outer peripheral wall of the end of the transmission shaft facing away from the driving motor. The limiting structure includes: a limiting retaining plate, along the axial direction of the transmission shaft, the limiting retaining plate is located on the side of the transmission shaft facing away from the driving motor and is connected to the transmission shaft through a fastener; a fixing sleeve, the fixing sleeve is sleeved on the transmission shaft and one end along the axial direction of the transmission shaft abuts against the elastic member, and the other end abuts against the limiting retaining plate. A positioning groove is provided on the inner wall of the fixing sleeve, and the positioning groove cooperates with the positioning protrusion.

[0012] In some embodiments, the testing device further includes: an inertia ring, the inertia ring is sleeved on the transmission shaft and rotates synchronously with the transmission shaft, and the inertia ring is located between the friction disc and the driving motor.

[0013] In some embodiments, the testing device further includes: a fixing structure, the fixing structure includes a bench fixing plate and a bench matching disc. Both the bench fixing plate and the bench matching disc are sleeved on the transmission shaft in a non-fixed manner. The bench fixing plate is fixedly connected to the bench, the bench matching disc is located on the side of the bench fixing plate facing away from the driving motor and is connected to the bench fixing plate, and the friction disc is provided on the side of the bench matching disc facing away from the bench fixing plate.

[0014] In some embodiments, a protruding portion is provided on the side of the bench fixing plate facing the bench matching disc. The protruding portion extends in a ring shape along the transmission shaft. A recessed portion is provided on the side of the bench matching disc facing the bench fixing plate, and the protruding portion extends into the recessed portion.

[0015] In some embodiments, a ring-shaped protrusion is provided on the side of the bench matching disc facing away from the bench fixing plate, and the friction disc is sleeved on the ring-shaped protrusion.

[0016] In some embodiments, the testing device further includes: a support bearing, which is fixed on the transmission shaft and rotatably connected to the bench, and the support bearing is located between the friction disc and the driving motor.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0019] Figure 1 is a cross-sectional view of the testing device according to an embodiment of the present utility model;

[0020] Figure 2 is a perspective view of the transmission shaft of the testing device according to an embodiment of the present utility model;

[0021] Figure 3 is a front view of the damping piece of the testing device according to an embodiment of the present utility model;

[0022] Figure 4 is a cross-sectional view of the damping piece of the testing device according to an embodiment of the present utility model;

[0023] Figure 5 is a perspective view of the fixing sleeve of the limiting structure of the testing device according to an embodiment of the present utility model;

[0024] Figure 6 is a front view of the fixing sleeve of the limiting structure of the testing device according to an embodiment of the present utility model;

[0025] Figure 7 is a cross-sectional view of the fixing sleeve of the limiting structure of the testing device according to an embodiment of the present utility model;

[0026] Figure 8 is a front view of the limiting tab of the limiting structure of the testing device according to an embodiment of the present utility model;

[0027] Figure 9 is a cross-sectional view of the limiting tab of the limiting structure of the testing device according to an embodiment of the present utility model;

[0028] Figure 10 is a front view of the elastic member of the testing device according to an embodiment of the present utility model;

[0029] Figure 11 is a cross-sectional view of the elastic member of the testing device according to an embodiment of the present utility model;

[0030] Figure 12 is a perspective view of a friction disc of a test device according to an embodiment of the present utility model;

[0031] Figure 13 is a front view of a friction disc of a test device according to an embodiment of the present utility model;

[0032] Figure 14 is a front view of a bench fixing plate of a fixing structure of a test device according to an embodiment of the present utility model;

[0033] Figure 15 is a sectional view of a bench fixing plate of a fixing structure of a test device according to an embodiment of the present utility model;

[0034] Figure 16 is a perspective view of a bench matching disc of a fixing structure of a test device according to an embodiment of the present utility model;

[0035] Figure 17 is a front view of a bench matching disc of a fixing structure of a test device according to an embodiment of the present utility model;

[0036] Figure 18 is a sectional view of a bench matching disc of a fixing structure of a test device according to an embodiment of the present utility model;

[0037] Figure 19 is a structural schematic diagram of a shock absorber according to an embodiment of the present utility model.

[0038] Reference numerals:

[0039] 100, test device;

[0040] 1, transmission shaft; 11, positioning protrusion; 12, positioning hole;

[0041] 2, friction disc; 21, mounting lug; 22, second mounting hole;

[0042] 3, damping sheet; 31, limiting boss;

[0043] 4, limiting structure; 41, limiting flap; 411, fastener; 412, through hole; 42, fixing sleeve; 421, limiting hole; 422, positioning groove;

[0044] 5, elastic member; 51, avoidance groove;

[0045] 6, drive motor;

[0046] 7, inertia ring;

[0047] 8. Fixed structure; 81. Bench fixing plate; 811. Protrusion; 812. First mounting hole; 82. Bench matching disc; 821. Recessed part; 822. Annular protrusion; 823. Counterbore; 824. Third mounting hole;

[0048] 9. Support bearing;

[0049] 200. Torque limiting system;

[0050] 300. Vibration damping system; 301. Helical spring; 302. Damping system;

[0051] 1000. Torsional damper. Detailed implementation manners

[0052] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0053] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 therefore should not be construed as a limitation to the present utility model.

[0054] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0055] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "attachment", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] The test device 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0057] As Figure 1 shown, the test device 100 according to an embodiment of the present utility model includes a bench, a transmission shaft 1, a friction disk 2, a damping sheet 3, a limiting structure 4, an elastic member 5, and a driving motor 6.

[0058] Specifically, the bench serves as a test bench for supporting and fixing the transmission shaft 1 and the driving motor 6 to measure and evaluate the performance of equipment or components. Further, with reference to the attached Figure 1 drawings, the transmission shaft 1 is rotatably arranged on the bench, and the transmission shaft 1 can only rotate in place and cannot move on the bench. The friction disk 2 is sleeved on the transmission shaft 1 and connected to the bench, so that the friction disk 2 remains stationary relative to the bench and does not rotate with the transmission shaft 1. The friction disk 2 is made of a friction material and has good friction performance and wear resistance to ensure stable frictional force and good transmission effect during the friction process. The friction disk 2 has the advantages of simple structure, light weight, easy installation and maintenance. At the same time, its working principle is simple and reliable, and it can achieve precise speed regulation and transmission control.

[0059] Furthermore, with reference to the attached Figure 1 drawings, the damping sheet 3 is sleeved and fixed on the transmission shaft 1. The damping sheet 3 is a device that organizes or reduces the vibration propagation by consuming the motion energy, and can achieve the effect of vibration reduction and noise reduction through the friction and energy conversion of the material. When the damping sheet 3 is applied to the torsional damper 1000, when the torsional damper 1000 vibrates, the damping sheet 3 can absorb and consume the energy of these vibrations and convert it into heat energy or other forms of energy, thereby effectively reducing the propagation of vibration and noise.

[0060] It should be noted that the friction disc 2 is a smooth friction disc, and the characteristics of the matching surfaces of the friction disc 2 and the damping plate 3 (such as roughness and surface treatment) will also affect the size of the friction coefficient. Optionally, the structural design of the damping plate 3 affects the size of the friction radius, and the material of the damping plate 3 will affect the size of the friction coefficient. The damping plate 3 can be made of different materials (such as metal, plastic, etc.), and the surface of the damping plate 3 facing the friction disc 2 can also be surface treated (such as spraying molybdenum, gluing rubber, gluing carbon and other wear-resistant materials) to improve the damping stability of the damping plate 3, providing more possibilities for the damping design of the torsional vibration damper 1000.

[0061] Further, see the attached Figure 1 As shown, the limiting structure 4 is fixed on the transmission shaft 1, and the limiting structure 4 is located on the side of the damping plate 3 away from the friction plate 2, and can limit the damping plate 3 from the side of the damping plate 3 away from the friction plate 2 to prevent the damping plate 3 from moving in the axial direction of the transmission shaft 1 (refer to the attached Figure 1 The damping plate 3 moves in the direction a shown in the figure to prevent the damping plate 3 from falling off the transmission shaft 1 and ensure the reliability of the damping plate 3. Figure 1 As shown, the elastic member 5 is located between the damping plate 3 and the limiting structure 4, and is used to drive the damping plate 3 to move toward the friction disk 2 to abut against the friction disk 2, so that the damping plate 3 and the friction disk 2 are always in contact. When relative rotation occurs between the damping plate 3 and the friction disk 2 and there is a speed difference, the preload force applied by the elastic member 5 causes a friction torque to be generated between the damping plate 3 and the friction disk 2 until the damping plate 3 keeps the speed consistent with that of the friction disk 2 under the action of the friction force.

[0062] For example, Figure 10 and Figure 11 As shown, the elastic member 5 can be a disc spring. The disc spring is a special spring that is tapered in the axial direction and bears loads. It is shaped like a conical disc. It can be used alone or in series or in parallel. The disc spring has high stiffness and strong buffering and vibration absorption ability. It can bear large loads with small deformation. It is suitable for occasions with small axial space requirements and is easy to install. The stress distribution of the disc spring decreases evenly from the inside to the outside, which can achieve the effect of low stroke and high compensation force. In addition, the disc spring is easy to use in combination, easy to disassemble and assemble during maintenance, economical, safe, and has a long service life. It should be noted that according to the mechanism of friction torque generation, the friction torque is greatly affected by factors such as friction coefficient, friction radius, disc spring force, and sliding speed. Therefore, when verifying the damping stability, it is necessary to verify the influence of the changes in the above factors on the friction torque.

[0063] Further, see Appendix Figure 1As shown in the figure, the drive motor 6 is arranged on the bench. The output shaft of the drive motor 6 is connected to the transmission shaft 1 and is located on the side of the friction disk 2 away from the damping piece 3, and is used to drive the transmission shaft 1 to rotate. When the drive motor 6 is powered on, the output shaft of the drive motor 6 rotates, driving the transmission shaft 1 to rotate together, and then driving the damping piece 3, the limiting structure 4 and the elastic member 5 to rotate together. However, since the friction disk 2 is fixedly connected to the bench, the friction disk 2 always remains stationary, so that the damping piece 3 rotates relative to the friction disk 2. Moreover, under the drive of the elastic member 5, the damping piece 3 always moves towards the direction close to the friction disk 2 to abut against the friction disk 2, generating a frictional torque between the damping piece 3 and the friction disk 2 until the rotational speeds of the damping piece 3 and the friction disk 2 are the same under the action of the frictional force.

[0064] It can be understood that as a vibration damping element of the powertrain, the torsional vibration damper 1000 can reduce the torsional vibration output by the engine through the damping system 302, suppress resonance and impact torque. The damping stability of the damping system 302 is particularly important during the whole vehicle life cycle, which can ensure the consistency of NVH (noise, vibration and harshness) performance under different operating conditions. It should be noted that as Figure 19 shown in the figure, the torsional vibration damper 1000 includes a torque limiting system 200 and a vibration damping system 300. The vibration damping system 300 includes a helical spring 301 and a damping system 302. The damping system 302 includes structures such as a damping piece 3, a friction disk 2, an elastic member 5 and a limiting structure 4.

[0065] In the prior art, for the inevitable wear of the damping system, the torsional vibration damper is usually designed according to experience and a sample is manufactured, and then the damping stability is verified on the bench and the whole vehicle. If the damping stability is not good, the design needs to be optimized and the above verification work is repeated. There are disadvantages such as large development investment, long verification cycle and uncertain effect.

[0066] However, the test device 100 of the present invention can first test the change of the damping value of the cooperation between the damping piece 3, the friction disk 2, the elastic member 5 and the limiting structure 4, quickly find out the boundary where the damping value reaches stability, and then assemble the damping piece 3, the friction disk 2, the elastic member 5 and the limiting structure 4 that pass the test and meet the damping stability requirements onto the torsional vibration damper 1000, realizing the judgment of the change range of the damping value during the whole life cycle at the initial stage of the design of the torsional vibration damper 1000, effectively shortening the development cycle, reducing the development risk, saving the development and manufacturing cost, reducing the whole vehicle and bench verification cycle and resources, and thus reducing the development and verification cost.

[0067] According to the test device 100 of the embodiments of the present utility model, by first testing the change of the damping value in the cooperation between the damping plate 3, the friction disc 2, the elastic member 5 and the limiting structure 4, quickly finding out the boundary where the damping value reaches stability, and then assembling the damping plate 3, the friction disc 2, the elastic member 5 and the limiting structure 4 that pass the test and meet the damping stability requirements onto the torsional damper 1000, it is possible to judge the change range of the damping value during the entire life cycle in the initial stage of the design of the torsional damper 1000, effectively shortening the development cycle, reducing the development risk, saving the development and manufacturing costs, reducing the vehicle and bench verification cycles and resources, thereby reducing the development and verification costs.

[0068] In some embodiments of the present utility model, referring to the attached Figure 3 , the attached Figure 4 , the attached Figure 5 , the attached Figure 6 and the attached Figure 7 As shown, a limiting boss 31 is provided on one of the damping plate 3 and the limiting structure 4, and a limiting hole 421 that cooperates with the limiting boss 31 is provided on the other. Through the cooperation of the limiting boss 31 and the limiting hole 421, relative rotation between the damping plate 3 and the limiting structure 4 can be avoided, ensuring that the damping plate 3 always rotates synchronously with the limiting structure 4, ensuring the effective drive of the transmission shaft 1 for the damping plate 3 and the limiting structure 4, ensuring the effective friction between the damping plate 3 and the friction disc 2, and avoiding the situation where the rotational speeds of the damping plate 3 and the friction disc 2 are the same but there is a rotational speed difference with the limiting structure 4, ensuring the test effectiveness and stability of the test device 100.

[0069] It can be understood that the limiting boss 31 extending towards the limiting structure 4 can be provided on the damping plate 3, and the limiting hole 421 that cooperates with the limiting boss 31 is provided on the limiting structure 4; it can also be that the limiting boss 31 extending towards the damping plate 3 is provided on the limiting structure 4, and the limiting hole 421 that cooperates with the limiting boss 31 is provided on the damping plate 3. It should be noted that in the direction perpendicular to the axis of the transmission shaft 1 (the a direction shown in reference to the attached Figure 1 ), the cross-section of the limiting boss 31 can be in the shape of a rectangle, a triangle or a circle, etc., and the limiting hole 421 is a rectangular hole, a triangular hole or a circular hole that matches the shape and size of the limiting boss 31, as long as relative rotation between the damping plate 3 and the limiting structure 4 can be prevented.

[0070] In a further embodiment of the present utility model, referring to the attached Figure 3 , the attached Figure 4 , the attached Figure 5 and the attached Figure 6As shown, a plurality of limiting bosses 31 are arranged at intervals in the circumferential direction of the transmission shaft 1, and a plurality of limiting holes 421 are provided corresponding to the plurality of limiting bosses 31 one by one. The damping piece 3 and the limiting structure 4 can be fixed at multiple positions spaced apart in the circumferential direction of the transmission shaft 1, preventing relative rotation between the damping piece 3 and the limiting structure 4, further ensuring that the damping piece 3 always rotates synchronously with the limiting structure 4, ensuring the effective drive of the transmission shaft 1 for the damping piece 3 and the limiting structure 4, ensuring the effective friction between the damping piece 3 and the friction disc 2, and preventing the situation where the damping piece 3 and the friction disc 2 have the same rotational speed but there is a rotational speed difference between the damping piece 3 and the limiting structure 4, thus ensuring the test effectiveness and stability of the test device 100. For example, the number of the limiting bosses 31 can be two, three, four, five or six, and the number of the limiting holes 421 can be two, three, four, five or six, and the limiting holes 421 correspond to the limiting bosses 31 one by one.

[0071] In a specific example, referring to the attached Figure 3 and the attached Figure 6 As shown, four limiting bosses 31 are provided on the damping piece 3. The four limiting bosses 31 are arranged at intervals in the circumferential direction of the transmission shaft 1. The limiting structure 4 has four limiting holes 421, and the four limiting holes 421 respectively correspond to the four limiting bosses 31 one by one. The four positions spaced apart in the circumferential direction of the damping piece 3 can prevent relative rotation between the damping piece 3 and the limiting structure 4, further ensuring that the damping piece 3 always rotates synchronously with the limiting structure 4, ensuring the effective drive of the transmission shaft 1 for the damping piece 3 and the limiting structure 4, ensuring the effective friction between the damping piece 3 and the friction disc 2, and preventing the situation where the damping piece 3 and the friction disc 2 have the same rotational speed but there is a rotational speed difference between the damping piece 3 and the limiting structure 4, thus ensuring the test effectiveness and stability of the test device 100.

[0072] In a further embodiment of the present utility model, referring to the attached Figure 10 As shown, the elastic member 5 is sleeved on the transmission shaft 1. The elastic member 5 has avoiding grooves 51 for avoiding the limiting bosses 31. The plurality of avoiding grooves 51 are arranged at intervals in the circumferential direction of the elastic member 5, which can facilitate the cooperation between the elastic member 5 and the damping piece 3 or the limiting structure 4, reduce the assembly difficulty of the test device 100, prevent relative rotation between the elastic member 5 and the damping piece 3 or the limiting structure 4, and ensure that the elastic member 5 drives the damping piece 3 to move towards the friction disc 2 to abut against the friction disc 2.

[0073] Further, referring to the attached Figure 3 and the attached Figure 10As shown, the number of the avoidance grooves 51 is an integer multiple of the number of the limit convex platforms 31, which can increase the matching positions between the damping piece 3 or the limit structure 4 and the elastic member 5, reduce the matching difficulty between the damping piece 3 or the limit structure 4 and the elastic member 5, and reduce the assembly difficulty of the testing device 100. Moreover, by changing the number of the avoidance grooves 51, the hardness and stiffness of the elastic member 5 can be changed, and thus the elastic force of the elastic member 5 can be adjusted. For example, when the number of the limit convex platforms 31 is two, the number of the avoidance grooves 51 can be two, four, six or eight; when the number of the limit convex platforms 31 is three, the number of the avoidance grooves 51 can be three, six or nine; when the number of the limit convex platforms 31 is four, the number of the avoidance grooves 51 can be four or eight.

[0074] In a specific example, referring to the appended Figure 3 and the appended Figure 10 As shown, four limit convex platforms 31 are provided on the damping piece 3, and the four limit convex platforms 31 are evenly spaced in the circumferential direction of the transmission shaft 1. The elastic member 5 has avoidance grooves 51 for avoiding the limit convex platforms 31, and the number of the avoidance grooves 51 is eight evenly spaced in the circumferential direction of the elastic member 5. The four limit convex platforms 31 are matched with four of the eight avoidance grooves 51, which can reduce the matching difficulty between the damping piece 3 and the elastic member 5 and reduce the assembly difficulty of the testing device 100.

[0075] In some embodiments of the present invention, referring to the appended Figure 1 and the appended Figure 2 and the appended Figure 5 and the appended Figure 8 As shown, a positioning protrusion 11 is provided on the outer peripheral wall of one end of the transmission shaft 1 departing from the driving motor 6. The limit structure 4 includes a limit retaining piece 41 and a fixing sleeve 42. Along the axial direction of the transmission shaft 1 (referring to the a direction shown in the appended Figure 1 ), the limit retaining piece 41 is located on the side of the transmission shaft 1 departing from the driving motor 6 and is connected to the transmission shaft 1 through a fastener 411. The fixing sleeve 42 is sleeved on the transmission shaft 1, one end along the axial direction of the transmission shaft 1 abuts against the elastic member 5, and the other end abuts against the limit retaining piece 41. A positioning groove 422 is provided on the inner wall of the fixing sleeve 42, and the positioning groove 422 is matched with the positioning protrusion 11.

[0076] It can be understood that, referring to the appended Figure 2 and the appended Figure 5 As shown, through the cooperation between the positioning groove 422 and the positioning protrusion 11, relative rotation between the fixing sleeve 42 and the transmission shaft 1 can be prevented, ensuring that the fixing sleeve 42 and the transmission shaft 1 rotate synchronously. Combining with the reference Figure 1 、 Figure 2 、 Figure 8 and Figure 9As shown, the limit retaining piece 41 has a through hole 412. One end of the transmission shaft 1 facing away from the drive motor 6 has a positioning hole 12. The fastener 411 passes through the through hole 412 and is fixed to the positioning hole 12, so that the limit retaining piece 41 is relatively fixed to the transmission shaft 1, thereby playing a limiting role on the fixed sleeve 42 from the end of the fixed sleeve 42 facing away from the drive motor 6, avoiding the axial movement of the fixed sleeve 42 along the transmission shaft 1 and preventing the fixed sleeve 42 from disengaging from the transmission shaft 1. The fixed sleeve 42 has a limiting hole 421, and the limiting hole 421 cooperates with the limiting boss 31 of the damping piece 3 and the avoidance groove 51 of the elastic member 5, so as to ensure that there is no relative rotation between the fixed sleeve 42, the elastic member 5 and the damping piece 3 and the transmission shaft 1, and the transmission shaft 1 drives the fixed sleeve 42, the elastic member 5 and the damping piece 3 to rotate.

[0077] It should be noted that the positioning protrusions 11 can be multiple ones spaced at intervals in the circumferential direction of the transmission shaft 1. Correspondingly, the inner wall of the fixed sleeve 42 has positioning grooves 422 corresponding one by one to the multiple positioning protrusions 11, which can cooperate the fixed sleeve 42 with the transmission shaft 1 at multiple places in the circumferential direction of the transmission shaft 1, further preventing the fixed sleeve 42 from rotating relative to the transmission shaft 1. For example, as Figure 2 and Figure 5 shown, the positioning protrusions 11 can be two rectangular teeth evenly spaced in the circumferential direction of the transmission shaft 1, and the positioning grooves 422 are two rectangular grooves evenly spaced in the circumferential direction of the fixed sleeve 42, and the two rectangular teeth correspond to the two rectangular grooves one by one; the positioning protrusions 11 can also be an involute spline structure, and the positioning grooves 422 are spline grooves matching the involute spline structure.

[0078] For example, the fastener 411 can be a bolt, and the positioning hole 12 can be a threaded hole. The bolt passes through the through hole 412 of the limit retaining piece 41 and cooperates with the threaded hole to axially limit the components on the entire transmission shaft 1. The pre-tightening force of the elastic member 5 can be adjusted by adjusting the screwing depth of the bolt, so as to meet the design requirements of different disc spring forces. Of course, the present invention is not limited thereto, and the fastener 411 can also be other fasteners.

[0079] In some embodiments of the present invention, referring to the attached Figure 1As shown, the test device 100 also includes an inertia ring 7, which is sleeved on the transmission shaft 1 and rotates synchronously with the transmission shaft 1. The inertia ring 7 is located between the friction disk 2 and the drive motor 6. The setting of the inertia ring 7 can provide a regular and measurable form to calculate the rotational inertia of an object or system. By measuring the acceleration and external torque of the inertia ring 7 during rotation, the inertia characteristics of the object can be obtained, and the inertia size of the torsional vibration damper 1000 when assembled on the whole vehicle can be evaluated to affect the sliding speed. It should be noted that the number and size of the inertia ring 7 can be adjusted according to the test requirements to meet different inertia requirements. Preferably, the inertia ring 7 is splined with the transmission shaft 1 to ensure the connection between the inertia ring 7 and the transmission shaft 1, which is convenient for the disassembly and assembly of the inertia ring 7.

[0080] In some embodiments of the present invention, refer to the attached Figure 1 As shown, the test device 100 also includes a fixed structure 8, which includes a bench fixing plate 81 and a bench matching disk 82. The bench fixing plate 81 and the bench matching disk 82 are both hollowly mounted on the transmission shaft 1, the bench fixing plate 81 is fixedly connected to the bench, the bench matching disk 82 is located on the side of the bench fixing plate 81 away from the drive motor 6 and is connected to the bench fixing plate 81, the friction disk 2 is arranged on the side of the bench matching disk 82 away from the bench fixing plate 81, and is fixed to the bench through the bench fixing plate 81, the bench matching disk 82 is detachably connected to the bench fixing plate 81, and the friction disk 2 is detachably connected to the bench matching disk 82, so that the friction disk 2 is indirectly connected to the bench fixing plate 81 through the bench matching disk 82, so that the friction disk 2 does not rotate relative to the bench.

[0081] It can be understood that the bench fixing plate 81 is always fixedly connected to the bench, and the bench matching disk 82 serves as a connection medium between the bench fixing plate 81 and the friction disk 2. It can be designed for different models of friction disks 2, so that there is no need to replace the bench fixing plate 81. Only the bench matching disk 82 that matches the friction disk 2 can be replaced to achieve indirect connection between the friction disk 2 and the bench fixing plate 81. This can reduce the production and processing cost of the test device 100, reduce the assembly difficulty of the test device 100 when testing different damping systems 302, and simplify the assembly process of the test device 100.

[0082] For details, please refer to the attached Figure 14 , Attachment Figure 16 and attached Figure 17As shown, a side of the stand fixing plate 81 facing the stand matching disk 82 has a plurality of first mounting holes 812, the first mounting holes 812 are blind holes, and the plurality of first mounting holes 812 are spaced apart in the circumferential direction of the stand fixing plate 81, and the stand matching disk 82 has a plurality of countersunk holes 823, and the plurality of countersunk holes 823 are spaced apart in the circumferential direction of the stand matching disk 82, and the plurality of countersunk holes 823 are opposite to the plurality of first mounting holes 812 one by one, and fasteners pass through the countersunk holes 823 and are fixed to the first mounting holes 812, so as to realize a detachable connection between the stand matching disk 82 and the stand fixing plate 81 from multiple locations in the circumferential direction of the stand matching disk 82.

[0083] In a further embodiment of the present invention, refer to the attached Figure 15 and attached Figure 18 As shown, a protrusion 811 is provided on one side of the bench fixing plate 81 facing the bench matching disk 82, and the protrusion 811 extends in a ring shape along the transmission shaft 1; a recessed portion 821 is provided on one side of the bench fixing plate 81 facing the bench matching disk 82, and the protrusion 811 extends into the recessed portion 821. Through the cooperation between the protrusion 811 and the recessed portion 821, a guiding role can be played, which is convenient for the cooperation between the bench matching disk 82 and the bench fixing plate 81, and the bench fixing plate 81 can be limited in the radial direction to realize the pre-positioning between the bench matching disk 82 and the bench fixing plate 81, and relative movement between the bench matching disk 82 and the bench fixing plate 81 is avoided, so that the bench matching disk 82 and the bench fixing plate 81 are connected by fasteners, thereby reducing the assembly difficulty of the test device 100, improving the assembly efficiency of the test device 100, and ensuring the relative position of the bench fixing plate 81 and the bench matching disk 82 in the axial direction of the transmission shaft 1.

[0084] In a further embodiment of the present invention, refer to the attached Figure 1 , Attachment Figure 16 and attached Figure 18 As shown, the side of the bench matching disk 82 facing away from the bench fixing plate 81 has an annular protrusion 822, and the friction disk 2 is sleeved on the annular protrusion 822, which can pre-position the friction disk 2 and avoid relative movement between the friction disk 2 and the bench matching disk 82, making it easier to connect the friction disk 2 and the bench matching disk 82 through fasteners, thereby reducing the assembly difficulty of the test device 100 and improving the assembly efficiency of the test device 100.

[0085] Specifically, refer to the attached Figure 12 and attached Figure 13 As shown, combined with reference Figure 16 and Figure 17, the outer peripheral wall of the friction disc 2 is provided with a plurality of mounting lugs 21. The plurality of mounting lugs 21 are arranged at intervals in the circumferential direction of the friction disc 2. Each mounting lug 21 has a second mounting hole 22. One side of the bench matching disc 82 facing the friction disc 2 has a plurality of third mounting holes 824. The plurality of third mounting holes 824 correspond to the plurality of second mounting holes 22 one by one. Fasteners pass through the second mounting holes 22 and are fixed in the third mounting holes 824, realizing the detachable connection between the friction disc 2 and the bench matching disc 82.

[0086] In some embodiments of the present invention, referring to the attached Figure 1 as shown, the test device 100 further includes a support bearing 9. The support bearing 9 is fixed on the transmission shaft 1 and is rotationally connected to the bench. The support bearing 9 is located between the friction disc 2 and the drive motor 6. It can be understood that the drive motor 6 is located at one end of the transmission shaft 1 in the length direction (referring to the a direction shown in the attached Figure 1 as shown), and can support the transmission shaft 1 from one end of the length direction of the transmission shaft 1. The friction disc 2 is indirectly connected to the bench fixing plate 81, and can support the transmission shaft 1 from a position spaced apart from the drive motor 6 of the transmission shaft 1. The support bearing 9 is also connected to the bench, and the support bearing 9 is located between the friction disc 2 and the drive motor 6, and can support the transmission shaft 1 at a position between the friction disc 2 and the drive motor 6, ensuring the smooth rotation of the transmission shaft 1 and avoiding the transmission shaft 1 from shaking during rotation.

[0087] It can be understood that when designing the damping system 302 of the torsional damper 1000, various different schemes can be designed according to different friction coefficients, friction radii, and disc spring forces, and then the bench test samples can be manufactured through processes such as machining or rapid prototyping with a simple mold, including friction discs 2, damping sheets 3, and elastic members 5 of different specifications. Then, the friction torque stability of the damping systems 302 of different schemes is verified according to the equivalent conversion test conditions, so as to obtain the optimal damping scheme.

[0088] The specific test process of the test device 100 is as follows: First, assemble all the components according to Figure 1 and complete the assembly. Set the inertia of the inertia ring 7 to 0.3 kg·m 2, the rotational speed of the driving motor 6 is controlled to be 1340 r / min. At this time, the driving motor 6 drives the transmission shaft 1 to rotate. Consequently, the inertia ring 7, the damping piece 3, the elastic member 5, the fixing sleeve 42, and the limit retaining piece 41 fixed on the transmission shaft 1 all rotate together with the transmission shaft 1. When the rotational speeds of the transmission shaft 1 and the inertia ring 7, the damping piece 3, the elastic member 5, the fixing sleeve 42, and the limit retaining piece 41 fixed on the transmission shaft 1 all reach 1340 r / min, the driving motor 6 stops driving. The transmission shaft 1 and the inertia ring 7, the damping piece 3, the elastic member 5, the fixing sleeve 42, and the limit retaining piece 41 fixed on the transmission shaft 1 continue to rotate under the action of inertia. However, since the friction disk 2, the bench matching disk 82, and the bench fixing plate 81 are fixedly connected to the bench, their initial rotational speed is 0 r / min. As a friction pair, the damping piece 3 and the friction disk 2 generate a frictional torque under the elastic force of the elastic member 5, and quickly synchronize the rotational speed of the damping piece 3 to 0 r / min. Record the magnitude of the frictional torque once, and repeat the above process up to 50,000 times. When the test ends, a damping change curve is obtained, which serves as the basis for optimizing the damping scheme.

[0089] It should be noted that the test device 100 of the present utility model adopts a test method of durability equivalent conversion. By strengthening the test rotational speed and inertia, the durability times are greatly compressed, achieving the effect of quickly verifying the damping stability, and reducing the development cost and test cost of the torsional damper 1000.

[0090] Other components and operations of the test device 100 according to the embodiments of the present utility model are known to those of ordinary skill in the art, and will not be described in detail here.

[0091] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0092] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A testing device, characterized in that, include: Stand; A transmission shaft, the transmission shaft being rotatably disposed on the stand; A friction disc, wherein the friction disc is hollowly sleeved on the transmission shaft and connected to the stand; A damping plate, the damping plate is sleeved and fixed on the transmission shaft; A limiting structure, wherein the limiting structure is fixed on the transmission shaft and is located on a side of the damping plate away from the friction plate; an elastic member, the elastic member being located between the damping plate and the limiting structure and being used for driving the damping plate to move toward the friction plate so as to abut against the friction plate; A drive motor is arranged on the stand, an output shaft of the drive motor is connected to the transmission shaft and is located on a side of the friction disc away from the damping plate, and is used to drive the transmission shaft to rotate.

2. The test device according to claim 1, wherein, One of the damping plate and the limiting structure is provided with a limiting boss, and the other is provided with a limiting hole matched with the limiting boss.

3. The testing device according to claim 2, wherein The limiting bosses are multiple and spaced apart along the circumferential direction of the transmission shaft, and the limiting holes are multiple and correspond one to one with the limiting bosses.

4. The test device according to claim 3, characterized in that The elastic member is sleeved on the transmission shaft, and has an avoidance groove for avoiding the limiting boss. A plurality of the avoidance grooves are arranged at intervals along the circumferential direction of the elastic member, and the number of the avoidance grooves is an integer multiple of the number of the limiting bosses.

5. The test device according to claim 1, characterized in that, The outer peripheral wall of the transmission shaft at one end away from the driving motor is provided with a positioning protrusion, and the limiting structure includes: A limit stopper, along the axial direction of the transmission shaft, the limit stopper is located on a side of the transmission shaft away from the drive motor and is connected to the transmission shaft via a fastener; A fixing sleeve is arranged on the transmission shaft and one end of the fixing sleeve along the axial direction of the transmission shaft abuts against the elastic member, and the other end abuts against the limit baffle. A positioning groove is provided on the inner wall of the fixing sleeve, and the positioning groove cooperates with the positioning protrusion.

6. The test device according to claim 1, wherein Also includes: An inertia ring is sleeved on the transmission shaft and rotates synchronously with the transmission shaft. The inertia ring is located between the friction disk and the drive motor.

7. The testing device according to claim 1, characterized in that, Also includes: A fixed structure, the fixed structure includes a bench fixing plate and a bench matching disk, the bench fixing plate and the bench matching disk are both hollowly mounted on the transmission shaft, the bench fixing plate is fixedly connected to the bench, the bench matching disk is located on the side of the bench fixing plate away from the drive motor and is connected to the bench fixing plate, and the friction disk is arranged on the side of the bench matching disk away from the bench fixing plate.

8. The test device according to claim 7, characterized in that, The side of the stand fixing plate facing the stand matching disk has a protrusion, the protrusion extends in a ring shape along the transmission shaft, and the side of the stand matching disk facing the stand fixing plate has a recess, the protrusion extends into the recess.

9. The test device according to claim 7, characterized in that, The side of the platform matching disk facing away from the platform fixing plate is provided with an annular protrusion, and the friction disk is sleeved on the annular protrusion.

10. The test device according to claim 1, characterized in that, Also includes: A support bearing is fixed on the transmission shaft and is rotatably connected to the stand, and the support bearing is located between the friction disk and the drive motor.

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