A torque fatigue testing device for a windshield wiper transmission mechanism of a rail transit vehicle

Abstract

The invention discloses a torque fatigue testing device for a rail transit vehicle wiper transmission mechanism, comprising a crossbeam, a bearing seat, a drive shaft, a drive mechanism, a wiper arm seat, a hydraulic cylinder, a transmission mechanism and an oil tank; the bearing seat is mounted on the crossbeam; the drive shaft is rotatably arranged in the bearing seat; the drive mechanism is arranged at one end of the drive shaft and provides a force for the drive shaft to rotate; the wiper arm seat sleeve is arranged at the other end of the drive shaft and can rotate under the rotation force of the drive shaft; the hydraulic cylinder is arranged outside one side of the wiper arm seat; the transmission mechanism is arranged between the hydraulic shaft of the hydraulic cylinder and the wiper arm seat, and converts the force of the wiper arm seat rotational motion into a force for driving the hydraulic shaft to move linearly; the oil tank is arranged at one side of the hydraulic cylinder, and a regulating valve and a pressure detection device are arranged on the pipeline connecting the two. Compared with the prior art, the beneficial effect of the present invention is that the maximum torque and the limit use state of the wiper transmission mechanism can be effectively detected.

Description

Technical Field

[0001] The invention belongs to the field of windshield wipers, and in particular relates to a torque fatigue testing device for a transmission mechanism of a windshield wiper of a rail transit vehicle. Background Art

[0002] The windshield wiper is an indispensable and important part of the EMU. It cleans the windshield of the EMU train and keeps the driver's vision clear. It is a key component to ensure the safety of the EMU train's high-speed operation in rainy days. Since the EMU is at high speed during driving, the operating environment of its windshield wiper is more complicated. When there is a problem with the transmission of the wiper, there will be a great safety hazard.

[0003] The current windshield wipers all realize the windshield wiping function by rotating the output shaft, thereby driving the wiper arm seat on which the wiper arm is installed to rotate.

[0004] However, a test device that can detect torque fatigue between the output shaft and the wiper arm seat in the wiper transmission mechanism has not yet been developed. Therefore, when the staff installs, replaces and repairs the wiper transmission mechanism of the EMU, they often have no data to rely on for judgment. This increases costs and poses certain safety hazards. Summary of the invention

[0005] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0006] The present invention provides a torque fatigue testing device for a wiper transmission mechanism of a rail transit vehicle, which is used to detect the maximum torque and the limit use state of the wiper transmission mechanism, and at the same time optimize and upgrade the wiper transmission mechanism to improve its performance index.

[0007] The invention discloses a torque fatigue testing device for a windshield wiper transmission mechanism of a rail transit vehicle, comprising:

[0008] A crossbeam mounted on the frame;

[0009] The bearing seat is mounted on the crossbeam;

[0010] A drive shaft is rotatably disposed in the bearing seat;

[0011] A driving mechanism is disposed at one end of the driving shaft and provides a force for the driving shaft to rotate;

[0012] The scraper arm seat is sleeved on the other end of the driving shaft and can rotate under the rotation force of the driving shaft;

[0013] A liquid cylinder is arranged outside one side of the scraper arm seat;

[0014] The transmission mechanism is arranged between the hydraulic shaft of the hydraulic cylinder and the scraper arm seat, and converts the force of the rotary motion of the scraper arm seat into the force of driving the hydraulic shaft to move linearly;

[0015] The oil tank is arranged on one side of the liquid cylinder and is connected with the liquid inlet pipeline and the liquid outlet pipeline, and the liquid inlet pipeline and the liquid outlet pipeline are provided with a regulating valve and a pressure detection device; by changing the opening size of the regulating valve, the pressure value obtained by the pressure detection device under different opening sizes is obtained, and the resistance torque applied by the transmission mechanism to the scraper arm seat is calculated according to the obtained pressure value.

[0016] In some embodiments, the transmission mechanism includes

[0017] The gear is fixedly sleeved on the outside of the scraper arm seat;

[0018] The rack guide meshes with the gear and is connected to the hydraulic shaft of the cylinder.

[0019] In some embodiments, the transmission mechanism further includes

[0020] The sliding guide rail is installed on one side of the crossbeam through the crossbeam bottom plate and is arranged between the rack guide rail and the crossbeam bottom plate.

[0021] In some embodiments, the sliding guide includes

[0022] A guide rail, installed below the rack guide rail;

[0023] The guide rail seat is installed horizontally on the bottom plate of the beam.

[0024] In some embodiments, the transmission mechanism further includes

[0025] The gear guide arm is arranged on the gear and extends outward with the geometric center of the gear as the axis;

[0026] The gear guide plate is an arc-shaped plate structure whose geometric center coincides with the geometric center of the gear;

[0027] The guide device is arranged on the gear guide arm and is slidably engaged with the two end surfaces of the gear guide plate.

[0028] In some embodiments, the guide device comprises

[0029] A first telescopic rod is arranged on the gear guide arm, the end of which is elastically abutted against one side of the gear guide plate, and a universal ball is arranged at the abutment point;

[0030] The second telescopic rod is arranged on the gear guide arm, and the end thereof extends to the other side of the gear guide plate and elastically abuts against it, and a universal ball is arranged at the abutting position.

[0031] In some embodiments, the drive mechanism comprises

[0032] A servo motor, a reducer, and a crank, a transmission handle, and a rocker handle that are hinged in sequence;

[0033] The servo motor and the crank are fixedly connected;

[0034] The crank handle and the drive shaft are fixedly connected.

[0035] In some embodiments, the scraper arm seat and the driving shaft are connected by a key connection, an expansion sleeve connection, or an interference connection.

[0036] In some embodiments, one end of the driving shaft connected to the scraper arm seat is a conical structure; the scraper arm seat is provided with a conical groove adapted to the conical structure; the conical structure and the conical groove fit each other.

[0037] In some embodiments, the tapered structure passes through the tapered groove, and a threaded column is provided at the outer end thereof and is fastened by a nut seat.

[0038] In some embodiments, a plurality of slots are evenly distributed on the outer circumference of the conical structure.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The reciprocating motion of the wiper is simulated by the movement of the driving mechanism, and the oil inlet and return rates between the cylinder and the oil tank are changed by controlling the opening of the regulating valve, thereby changing the pressure value in the pipeline. The resistance torque applied by the transmission mechanism to the wiper arm seat is calculated by the pressure value, and the maximum torque test and fatigue test between the drive shaft and the wiper arm seat are realized.

[0041] 2. In order to ensure that the transmission mechanism can more effectively convert the force of rotational motion into the force of linear motion, a gear and rack guide structure is adopted, and corresponding double guides are configured to ensure a smoother transition when the force transmission direction changes, so as to ensure the accuracy of the detection.

[0042] 3. The structural form of the drive shaft and the scraper arm seat is further optimized, and a conical surface is used to increase the friction area between the two, thereby increasing the friction between the two to improve the anti-rotation effect and increase the upper limit of the maximum torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0044] In the attached picture:

[0045] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0046] Figure 2 It is the front view of the present invention.

[0047] Figure 3 It is a schematic structural diagram of the first telescopic rod and the second telescopic rod of the present invention.

[0048] Figure 4 It is a schematic structural diagram of the drive shaft and the scraper arm seat of the present invention.

[0049] Figure 5 It is a schematic diagram of the three-dimensional structure of the driving mechanism of the present invention.

[0050] Description of the drawings: crossbeam 1, bearing seat 2, drive shaft 3, scraper arm seat 4, gear 5, rack guide 6, guide rail 7, crossbeam bottom plate 8, threaded column 9, nut seat 10, hydraulic cylinder 11, gear guide arm 12, gear guide plate 13, first telescopic rod 14, second telescopic rod 15, universal ball 16, oil tank 17, liquid inlet pipeline 18, liquid outlet pipeline 19, regulating valve 20, pressure detection device 21, servo motor 22, reducer 23, crank 24, transmission handle 25, rocker 26. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0052] Obviously, the drawings described below are only some examples or embodiments of the present invention. For ordinary technicians in this field, the present invention can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed by the present invention, some changes in design, manufacturing or production based on the technical content disclosed by the present invention are just conventional technical means, and should not be understood as insufficient content disclosed by the present invention.

[0053] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present invention may be combined with other embodiments without conflict.

[0054] like Figure 1 and Figure 4 As shown, a torque fatigue test device for a transmission mechanism of a rail transit vehicle wiper comprises a crossbeam 1, a bearing seat 2, a drive shaft 3, a drive mechanism, a wiper arm seat 4, a hydraulic cylinder 11, a transmission mechanism, and an oil tank 17. The crossbeam 1 is installed at the middle part of the upper end of the frame; a bearing seat 2 for placing the drive shaft 3 is installed on the crossbeam 1; bearings for supporting the rotation of the drive shaft 3 are provided at both ends of the bearing seat 2; a drive mechanism is provided at one end of the drive shaft 3; a wiper arm seat 4 is sleeved at the other end of the drive shaft 3; a hydraulic cylinder 11 is provided outside one side of the wiper arm seat 4; a transmission mechanism is provided between the hydraulic shaft of the hydraulic cylinder 11 and the wiper arm seat 4; an oil tank 17 is provided on one side of the hydraulic cylinder 11; a liquid inlet pipeline 18 and a liquid outlet pipeline 19 are provided between the hydraulic cylinder 11 and the oil tank 17, and a regulating valve 20 and a pressure detection device 21 are provided on the liquid inlet pipeline 18 and the liquid outlet pipeline 19. By changing the opening of the regulating valve, the pressure values ​​measured by the pressure detection device 21 at different openings are obtained, and the resistance torque applied by the transmission mechanism to the scraper arm seat 4 is calculated according to the measured pressure values.

[0055] The drive shaft 3 and the wiper arm seat 4, as the transmission mechanism of the wiper, are also the detection parts for the maximum torque test and fatigue test to be carried out in this application; the wiper arm seat 4 can be driven to rotate under the rotational force of the drive shaft 3; through the transmission mechanism arranged between the hydraulic shaft of the hydraulic cylinder 11 and the wiper arm seat 4, the rotational force on the wiper arm seat 4 driven to rotate is converted into a force that pushes the hydraulic shaft to move linearly; by controlling the opening size of the regulating valve 20, the pressure value in the pipeline is changed, and then the resistance torque applied to the wiper arm seat 4 is further calculated. When the drive shaft 3 cannot drive the wiper arm seat 4 to rotate, the maximum torque between the drive shaft 3 and the wiper arm seat 4 is measured. Among them, when the pressure detection device 21 is a pressure gauge, since the value measured by the pressure gauge is pressure, it is necessary to first convert it into a pressure value according to the situation in the pipe, and then further calculate the resistance torque applied to the wiper arm seat 4.

[0056] In the above embodiment, the method of converting the rotational force on the scraper arm seat 4 into the force for driving the hydraulic shaft to move linearly can be realized by using a multi-section hinged connecting rod mechanism. However, in actual design and use, it is found that the use of the above structure will cause the complexity of its connection structure and instability in the force transmission process.

[0057] In order to solve the above problems, Figure 1 and Figure 2As shown, the transmission mechanism uses the cooperation of the gear 5 and the rack guide 6 to transform the direction of force transmission. The gear 5 is fixedly sleeved on the outside of the scraper arm seat 4; the rack guide 6 is meshed with the gear 5 and connected to the hydraulic shaft of the hydraulic cylinder 11. The reciprocating rotation of the gear 5 drives the rack guide 6 to perform reciprocating linear motion, thereby more directly transmitting the force to the hydraulic shaft of the hydraulic cylinder 11 to improve the test accuracy.

[0058] In the above process, since the gear 5 and the rack guide 6 will exert a downward force during the force transmission process, and the rack guide 6 itself will not be able to accurately coincide with the horizontal baseline due to the gravity factor, this will cause the force to deviate during the transmission process, thereby affecting the test accuracy.

[0059] In order to solve the above problems, Figure 4 As shown, a sliding guide rail is further provided on the basis of the transmission mechanism. The sliding guide rail is installed on one side of the crossbeam through the crossbeam bottom plate and is provided between the rack guide rail and the crossbeam bottom plate. Further, the sliding guide rail includes a guide rail 7 and a guide rail seat; the guide rail 7 is installed below the rack guide rail 6; the guide rail seat is horizontally installed on the crossbeam bottom plate 8. The above design provides a motion guiding function and a supporting force function for the rack guide rail 6.

[0060] In the above implementation process, since the driving shaft 3 drives the scraper arm seat 4 to rotate, the equipment will inevitably generate mechanical vibrations during the movement, which may cause the driving shaft 3 and the scraper arm seat 4 to be displaced and deviated in the axial direction, thereby causing misalignment of the gear 5 and the rack guide 6.

[0061] like Figure 2 and Figure 3 As shown, the transmission mechanism is further provided with a gear guide arm 12, a gear guide plate 13 and a guide device; the gear guide arm 12 is provided on the gear 5 and extends outward with the geometric center of the gear 5 as the axis; the gear guide plate 13 is an arc-shaped plate structure whose geometric center coincides with the geometric center of the gear 5; the guide device is provided on the gear guide arm 12 and is slidably engaged with the two end surfaces of the gear guide plate 13. The guide device limits the gear 5 from deflecting in the axial direction, thereby ensuring the stability of the equipment when it is in operation and guaranteeing the detection accuracy.

[0062] In the above implementation process, since the device is used as a detection device, the detection components will be continuously replaced. During the installation and fixing process, it is inevitable that the gear 5 will be offset to a certain extent. Excessive offset will cause the friction force on one side of its guide device to suddenly increase, which will inevitably affect subsequent tests.

[0063] In order to solve the above problems, Figure 3As shown, the guide device includes a first telescopic rod 14 and a second telescopic rod 15; the first telescopic rod 14 is arranged on the gear guide arm 12, and its end is elastically abutted with one side of the gear guide plate 13, and a universal ball 16 is provided on the abutment of the first telescopic rod 14; the second telescopic rod 15 is arranged on the gear guide arm 12, and its end extends to the other side of the gear guide plate 13 and elastically abuts, and a universal ball 16 is provided on the abutment of the first telescopic rod 14. The corresponding elastic buffer space is provided by the telescopic structure of the first telescopic rod 14 and the second telescopic rod 15 and the elastic components such as springs provided inside, and the contact area between the first telescopic rod 14 and the second telescopic rod 15 and the gear guide plate 13 is greatly reduced through the sliding and rolling connection of the universal ball 16, and the friction between the two is reduced, so as to reduce the impact on the detection.

[0064] In some embodiments, the driving mechanism includes a servo motor 22, a reducer 23, and a crank 24, a transmission handle 25, and a rocker 26 that are hinged to each other in sequence; the servo motor 22 and the crank 24 are fixedly connected; and the rocker 26 is fixedly connected to the drive shaft 3. Since the driving mechanism is to simulate the reciprocating swinging action of the wiper, it is impossible to realize the rotational swinging of the drive shaft 3 by means of belt connection, and it is also difficult to simulate the reciprocating swinging of the wiper. In this embodiment, the crank 24 is driven to rotate by the servo motor 22, thereby driving the transmission handle 25 to move, and further realizing the reciprocating swinging of the rocker 26 with its geometric center as the axis, which can well simulate the use state of the wiper, and the reducer 23 can adjust the speed of the servo motor, further improving the fatigue test speed of its structural dynamics.

[0065] In the above embodiment, the main purpose is to detect the maximum transmission torque between the wiper arm seat 4 and the drive shaft 3, so the transmission structure between the wiper arm seat 4 and the drive shaft 3 can be a key connection, an expansion sleeve connection, or an interference connection. Of course, the corresponding detection is the maximum torque and fatigue test between the wiper arm seat 4 and the drive shaft 3 under the current connection structure state. Therefore, that is to say, the torque fatigue test device of the present application can be used to detect the wiper transmission mechanism of the above-mentioned different structural forms.

[0066] Furthermore, based on the torque fatigue test device itself, a new rail transit vehicle wiper transmission mechanism is further designed, and the end where the drive shaft 3 and the wiper arm seat 4 are connected is a conical structure; the wiper arm seat 4 is provided with a conical groove adapted to the conical structure; and a number of slots are evenly distributed on the outer circumference of the conical structure. The conical structure and the conical groove fit together and form a transmission friction connection. At the same time, the friction between the drive shaft 3 and the wiper arm seat 4 is increased by the conical structure and the slots, and the conical structure is further penetrated into the conical groove, and a threaded column 9 is provided at its outer end and fastened by a nut seat 10. Thereby ensuring the reliability of torque transmission.

[0067] Its working principle is:

[0068] The operator selects the drive shaft 3 and scraper arm seat 4 that need to be tested (here, a drive shaft 3 with a conical structure and a scraper arm seat 4 with a conical groove are taken as examples), and installs them in the corresponding bearing seat 2 and gear 5 respectively, wherein the drive shaft 3 and the bearing seat 2 are rotationally connected through a bearing, and the gear 5 is fixedly sleeved on the outside of the scraper arm seat 4; the end of the drive shaft 3 connected to the scraper arm seat 4 is a conical structure, and a threaded column 9 is provided at its outer end, and a conical groove is provided in the scraper arm seat 4, the conical structure and the conical groove are fitted together, and the threaded column 9 passes through the conical groove and extends to the outside, and a nut seat 10 is added on the outside for fastening the connection, and a gasket can be added at the connection between the two to improve the reliability of torque transmission.

[0069] The servo motor 22 starts to work through the coordinated movement of the crank 24, the transmission handle 25, and the rocker 26, simulating the reciprocating swinging use state of the wiper, so that the drive shaft 3 performs reciprocating swinging rotation. Under the action of friction, the drive shaft 3 will drive the wiper arm seat 4 to swing and rotate, thereby causing the gear 5 to swing and rotate, and drive the reciprocating linear motion of the rack guide 6, and the rack guide 6 reciprocates to pull the hydraulic shaft of the hydraulic cylinder 11. At this time, by adjusting the opening of the regulating valve 20 on the liquid inlet pipeline 18 and the liquid outlet pipeline 19 between the hydraulic cylinder 11 and the oil tank 17, the pipeline pressure value of the oil inlet and return between the hydraulic cylinder 11 and the oil tank 17 is changed, and finally the resistance torque applied to the wiper arm seat 4 is obtained by calculation. When the drive shaft 3 cannot drive the wiper arm seat 4 to rotate, the maximum torque between the drive shaft 3 and the wiper arm seat 4 is measured.

[0070] At the same time, the present application can also simulate the limit fatigue values ​​of the drive shaft 3 and the scraper arm seat 4 under normal use. In order to speed up the data calculation, the swing frequency of the drive mechanism is changed by the reducer 23, and a corresponding counter can be added to read the limit swing value.

[0071] In summary, from the perspective of driving, the present invention simulates the reciprocating swinging state of the wiper through the connecting rod mechanism of the crank, transmission handle and rocker. This transmission method is simple and reliable. At the same time, the drive frequency can be adjusted by setting a reducer to improve the efficiency of fatigue detection. From the perspective of transmission, the present invention adopts the transmission method of gears and rack guides to convert the rotational force into a linear force acting on the hydraulic cylinder. The hydraulic shaft of the hydraulic cylinder is subjected to force more directly, which reduces the transmission loss of force. At the same time, in order to ensure the stability of the force in the transmission state, corresponding gear guides and rack guides are set, and the interference of friction in the guide is further reduced by optimizing the components. From the perspective of structural principle, the present invention adopts a hydraulic cylinder and an oil tank as structural components for applying a resistance torque. Through the liquid inlet and outlet pipelines, a dynamic simulation corresponding to the cyclic swing of the wiper is achieved well. By controlling the opening size of the regulating valve, it can simulate the application of resistance torques of different sizes. The operation is simple and easy to control.

[0072] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torque fatigue test device for a wiper transmission mechanism of a rail transit vehicle, characterized in that: include A crossbeam (1) mounted on the frame; A bearing seat (2) is mounted on the crossbeam (1); A driving shaft (3) is rotatably disposed in the bearing seat (2); A driving mechanism is disposed at one end of the driving shaft (3) and provides a force for rotating the driving shaft (3); The scraper arm seat (4) is sleeved on the other end of the driving shaft (3) and can rotate under the rotation force of the driving shaft (3); A liquid cylinder (11) is arranged outside one side of the scraper arm seat (4); The transmission mechanism is arranged between the hydraulic shaft of the hydraulic cylinder (11) and the scraper arm seat (4), and converts the force of the rotary motion of the scraper arm seat (4) into the force of driving the hydraulic shaft to move linearly; The oil tank (17) is arranged on one side of the liquid cylinder (11) and is connected to the oil tank via a liquid inlet pipeline (18) and a liquid outlet pipeline (19), and the liquid inlet pipeline (18) and the liquid outlet pipeline (19) are provided with a regulating valve (20) and a pressure detection device (21); by changing the opening size of the regulating valve (20), the pressure value obtained by the pressure detection device (21) under different opening sizes is obtained, and the resistance torque applied by the transmission mechanism to the scraper arm seat (4) is calculated according to the obtained pressure value; The transmission mechanism comprises A gear (5) is fixedly sleeved on the outside of the scraper arm seat (4); A rack guide rail (6) meshing with the gear (5) and connected to the hydraulic shaft of the hydraulic cylinder (11); The gear guide arm (12) is arranged on the gear (5) and extends outward with the geometric center of the gear (5) as the axis; The gear guide plate (13) is an arc-shaped plate structure, and its geometric center coincides with the geometric center of the gear (5); The guide device is arranged on the gear guide arm (12) and is slidably engaged with the two end surfaces of the gear guide plate (13). The guide device is used to limit the gear (5) from deflecting in the axial direction.

2. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 1, characterized in that: Also includes The sliding guide rail is installed on one side of the crossbeam (1) through the crossbeam bottom plate (8) and is arranged between the rack guide rail (6) and the crossbeam bottom plate (8).

3. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 1, characterized in that: The guide device includes A first telescopic rod (14) is arranged on the gear guide arm (12), the end of which is elastically abutted against one side of the gear guide plate (13), and a universal ball (16) is arranged at the abutment point; The second telescopic rod (15) is arranged on the gear guide arm (12), the end of which extends to the other side of the gear guide plate (13) and elastically abuts against it, and a universal ball (16) is arranged at the abutment point.

4. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 1, characterized in that: The drive mechanism includes A servo motor (22), a speed reducer (23), and a crank (24), a transmission handle (25), and a rocker (26) which are hinged in sequence; The reducer (23) and the crank (24) are fixedly connected; The crank handle (26) and the drive shaft (3) are fixedly connected.

5. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 1, characterized in that: The scraper arm seat (4) and the drive shaft (3) are connected via a key connection, an expansion sleeve connection or an interference connection.

6. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 1, characterized in that: One end of the driving shaft (3) connected to the scraper arm seat (4) is a conical structure; the scraper arm seat (4) is provided with a conical groove matched with the conical structure; the conical structure and the conical groove are in close contact with each other.

7. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 6, characterized in that: The conical structure passes through the conical groove, and a threaded column (9) is provided at the outer end thereof and is fastened and connected via a nut seat (10).

8. The torque fatigue testing device for the wiper transmission mechanism of a rail transit vehicle according to claim 6 or 7, characterized in that: A plurality of slots are evenly distributed on the outer circumference of the conical structure.

Images