A fatigue test device for a traction rod of a bullet train

Abstract

The application provides a fatigue test device for a traction rod of a motor train unit, comprising a base, a first component, a second component and a traction rod. The base is located at the lower end of the fatigue test device, the first component is installed on the upper end of the base, the first component is used for limiting the traction rod to rotate horizontally around the elastic rubber node on the first end, and the second component is installed on one side of the first component. The application adopts a horizontal layout by simulating the actual working condition of the traction rod, and the actuator is horizontally placed. The first end of the traction rod is fixed, the second end is connected with a track plate through a roller, the track plate is driven by the actuator, when the track plate runs to the end of the stroke, the second end of the traction rod is stretched / compressed together to simulate the axial load applied on the traction rod, and when the track plate moves, the roller makes a deflection / torsion movement to simulate the deflection / torsion load applied on the rubber node.

Description

Technical Field

[0001] This invention relates to the field of train traction rod testing technology, and in particular to a fatigue testing device for train traction rod components. Background Technology

[0002] The traction device of a high-speed train is the connection between the car body and the bogie, used to transmit horizontal forces between the car body and the bogie, while ensuring the rotational movement between the car body and the bogie. The car body and bogie typically use a "Z"-shaped arrangement of traction rods in conjunction with a central traction pin to transmit longitudinal forces.

[0003] The traction rod assembly is used to connect the car body and the bogie, transmitting traction and braking forces between them. Both ends of the traction rod assembly are equipped with elastic rubber joints, which can absorb a certain amount of vibration and deformation. The rubber joints allow the bogie to have degrees of freedom in the lateral, vertical, roll, and pitch directions relative to the car body, but restrict the longitudinal displacement between the bogie and the car body. In the event of a car body collision, the traction rod rubber joints allow longitudinal displacement of the center pin. During vehicle operation, the traction rod assembly must withstand the impact and fatigue effects of loads such as tension, compression, torsion, and deflection forces. Therefore, the performance of the traction rod assembly needs to be accurately and realistically tested before installation.

[0004] Chinese patent CN203616108U discloses a loading device for testing traction rods of rail vehicles, including a base, a lifting bracket, a force-applying device, and a lifting platform. It has a simple structure and flexible installation. It adopts dual-guide technology to overcome the problem of instability of the rubber components of the traction rod under pressure. It accurately simulates the force distribution at the end of the actual traction rod and can realize bidirectional tensile and compressive tests, thereby enabling static strength and fatigue tests of traction rods of rail vehicles.

[0005] The aforementioned patents do not address how to simulate the impact and fatigue effects of loads such as tensile force, compressive force, torsional force, and deflection force on traction rods through different methods. Therefore, there is an urgent need for a fatigue testing device for train traction rods. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a fatigue testing device for train traction rods. This device can simulate different torsion angles and deflection angles by replacing the track plates, and can simultaneously simulate different operating conditions such as tensile / compression and deflection / torsion loads.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fatigue testing device for a train traction rod assembly, comprising a base, a first component, a second component, and a traction rod;

[0008] The base is located at the lower end of the fatigue testing device. A first component is installed on the upper end of the base. The first component is used to limit the traction rod to horizontal rotation only around the elastic rubber node on the first end. A second component is installed on one side of the first component. The second component is slidably connected to the base and can move along the guide rail.

[0009] A traction rod is installed between the first component and the second component, and the traction rod is slidably or rotatably connected to the second component.

[0010] The traction rod has a first end and a second end at both ends. The first end is installed inside the first component, and the second end is installed inside the second component. Both the first end and the second end are provided with elastic rubber nodes.

[0011] Preferably, the first component includes a first base and a pressure plate, the first base is located at the lower end of the first component, the pressure plate is located at the upper end of the first component, and the pressure plate is installed on the upper side of the first base.

[0012] Preferably, the first base is installed on the upper side of the base, and a first slot is provided in the middle of the first base. The first slot is used to nest the elastic rubber node at the upper or lower end of the first end. A second slot is provided in the middle of the pressure plate. The second slot is used to nest the elastic rubber node at the upper or lower end of the first end.

[0013] Preferably, the second component includes a limiting structure and a pulley structure. The limiting structure is installed on the upper end of the base, and the pulley structure is installed inside the limiting structure. The limiting structure is used to limit the range of movement of the traction rod, and the pulley structure facilitates movement and reduces friction loss.

[0014] Preferably, the limiting structure is mounted on the upper side of the base via a guide rail. The limiting structure includes a limiting component and a track component. The limiting component is mounted on the lower end of the limiting structure and is used to limit the movement range of the traction rod. The track component is mounted on the upper end of the limiting structure and is used to limit the movement range of the roller. The limiting component is mounted on the lower side of the track component, and a pulley structure is installed in a preset slot in the track component.

[0015] Preferably, the limiting component includes a slider and a first connecting plate. The slider is installed at the lower end of the limiting component and on the upper side of the guide rail. The first connecting plate is installed at the upper end of the limiting component and on the upper side of the slider.

[0016] The lower surface of the slider has a third slot, which is square, and the first connecting plate is L-shaped.

[0017] Preferably, the track assembly includes a track plate and a track mounting plate. The track mounting plate is mounted on the upper side of the first connecting plate, and the track plate is mounted in the middle of the track mounting plate. A first connector is mounted on the upper side of the track mounting plate. The first connector has elongated holes at both ends for adjusting and fixing the position.

[0018] Preferably, the lower end of the track mounting plate has a fourth groove, which is right-angled; the middle part of the track mounting plate has a fifth groove, which is square; and the middle part of the track plate has a sixth groove.

[0019] Preferably, the pulley structure includes a roller and a second base. The roller is installed in a pre-set slot in the track plate. The second base is installed on one side of the roller and on the side of the second end. The second base has a seventh slot for nesting and installing the elastic rubber node at the left or right end of the second end. The second base also has a circular slot for fixing the elastic rubber node at the second end and the second base.

[0020] Preferably, the second component further includes a connecting assembly, which is installed on one side of the limiting structure. The connecting assembly includes a second connecting plate, a third base, and a second connecting member. The second connecting plate is installed on one side of the guide rail mounting plate. The third base is installed on one side of the second connecting plate. The third base may be a hinged base. A connecting rod is installed on one side of the third base. The connecting rod may be a threaded rod. The second connecting member is installed on one side of the connecting rod. The second connecting member may be a flange.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. This invention adopts a horizontal layout to simulate the actual working conditions of the traction rod assembly, with the actuator placed horizontally. The first end of the traction rod assembly is fixed, and the second end is connected to the track plate through rollers. The track plate is driven by the actuator. When the track plate reaches the end of its stroke, it causes the second end of the traction rod assembly to be stretched / compressed together, simulating the axial load applied to the traction rod assembly. When the track plate moves, it causes the rollers to make deflection / torsion movements, simulating the deflection / torsion load applied to the rubber joint.

[0023] 2. This invention can simulate different torsion angles and deflection angles by changing the track plate, and can simultaneously simulate different operating conditions such as tension / compression and deflection / torsion loads, which is highly practical. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a schematic diagram of the traction rod of the present invention;

[0027] In the diagram: Base 1; First component 2; First base 3; Pressure plate 4; Second component 5; Limiting structure 6; Limiting assembly 7; First connecting plate 8; Slider 9; Track assembly 10; Track plate 11; Track mounting plate 12; Pulley structure 13; Roller 14; Second base 15; Connecting assembly 16; Second connecting plate 17; Second connecting piece 18; Third base 19; Traction rod 20; First end 21; Second end 22; Guide rail 23; First connecting piece 24; Connecting rod 25. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figure 1 As shown, the present invention provides a technical solution: a fatigue testing device for a train traction rod assembly, comprising a base 1, a first component 2, a second component 5, and a traction rod 20;

[0032] The base 1 is located at the lower end of the fatigue testing device. A first component 2 is installed on the upper end of the base 1. The first component 2 is used to limit the traction rod 20 to horizontal rotation only around the elastic rubber node on the first end 21. A second component 5 is installed on one side of the first component 2. The second component 5 is slidably connected to the base 1 and can move along the guide rail 23.

[0033] A traction rod 20 is installed between the first component 2 and the second component 5, and the traction rod 20 is slidably connected or rotatably connected to the second component 5;

[0034] like Figure 3 As shown, the traction rod 20 has a first end 21 and a second end 22 at both ends. The first end 21 is installed inside the first component 2, and the second end 22 is installed inside the second component 5. Both the first end 21 and the second end 22 are provided with elastic rubber nodes.

[0035] like Figure 1 As shown, the first component 2 includes a first base 3 and a pressure plate 4. The first base 3 is located at the lower end of the first component 2, and the pressure plate 4 is located at the upper end of the first component 2. The pressure plate 4 is installed on the upper side of the first base 3.

[0036] like Figure 1 or Figure 3 As shown, the first base 3 is installed on the upper side of the base 1. The first base 3 has a first slot in the middle, which is used to nest the elastic rubber node at the upper or lower end of the first end 21. The pressure plate 4 has a second slot in the middle, which is used to nest the elastic rubber node at the upper or lower end of the first end 21.

[0037] like Figure 2 As shown, the second component 5 includes a limiting structure 6 and a pulley structure 13. The limiting structure 6 is installed on the upper end of the base 1, and the pulley structure 13 is installed inside the limiting structure 6. The limiting structure 6 is used to limit the movement range of the traction rod 20, and the pulley structure 13 facilitates movement and reduces friction loss.

[0038] like Figure 1 or Figure 2 As shown, the limiting structure 6 is mounted on the upper side of the base 1 via the guide rail 23. The limiting structure 6 includes a limiting component 7 and a track component 10. The limiting component 7 is mounted on the lower end of the limiting structure 6 and is used to limit the movement range of the traction rod 20. The track component 10 is mounted on the upper end of the limiting structure 6 and is used to limit the movement range of the roller. The limiting component 7 is mounted on the lower side of the track component 10. A pulley structure 13 is installed in the preset slot of the track component 7.

[0039] Limiting components 7 are symmetrically distributed on the upper side of base 1, and track components 10 are symmetrically distributed on the upper side of base 1.

[0040] like Figure 2 As shown, the limiting component 7 includes a slider 9 and a first connecting plate 8. The slider 9 is installed at the lower end of the limiting component 7 and on the upper side of the guide rail 23. The first connecting plate 8 is installed at the upper end of the limiting component 7 and on the upper side of the slider 9.

[0041] The lower surface of the slider 9 has a third groove, which is square, and the first connecting plate 8 is L-shaped.

[0042] The track assembly 10 includes a track plate 11 and a track mounting plate 12. The track mounting plate 12 is mounted on the upper side of the first connecting plate 8, and the track plate 11 is mounted in the middle of the track mounting plate 12. A first connector 24 is mounted on the upper side of the track mounting plate 12. The first connector 24 has elongated holes at both ends for adjusting and fixing the position.

[0043] The lower end of the track mounting plate 12 has a fourth slot, which is right-angled. The middle part of the track mounting plate 12 has a fifth slot, which is square. The middle part of the track plate 11 has a sixth slot.

[0044] like Figure 2 As shown, the pulley structure 13 includes a roller 14 and a second base 15. The roller 14 is installed in a pre-set slot in the track plate 11. The second base 15 is installed on one side of the roller 14. The second base 15 is installed on the side of the second end 22. The second base 15 has a seventh slot, which is used to nest and install the elastic rubber node at the left or right end of the second end 22. The second base 15 also has a circular slot for fixing the elastic rubber node of the second end 22 and the second base 15.

[0045] like Figure 1 or Figure 2 As shown, the second component 5 also includes a connecting assembly 16, which is installed on one side of the limiting structure 6. The connecting assembly 16 includes a second connecting plate 17, a third base 19, and a second connecting member 18. The second connecting plate 17 is installed on one side of the guide rail 23 mounting plate. The third base 19 is installed on one side of the second connecting plate 17. The third base 19 can be a hinged seat. A connecting rod 25 is installed on one side of the third base 19. The connecting rod 25 can be a threaded rod. The second connecting member 18 is installed on one side of the connecting rod 25. The second connecting member 18 can be a flange.

[0046] Working principle of this invention:

[0047] This invention employs a horizontal layout to simulate the actual working conditions of the traction rod assembly. During operation, the actuator is placed horizontally and connected to the second connecting member 18. The pressure plate 4 is removed, and the first end 21 of the traction rod 20 is installed on the upper side of the first base 3. The pressure plate 4 is then fastened, and the second end 22 is installed in the sixth slot in the middle of the track plate 11 via the roller 14. The second component 5 is driven by the actuator. When the roller 14 moves to the end of the track, it causes the second end 22 of the traction rod 20 to be stretched / compressed together, simulating the axial load applied to the traction rod 20. When the second component 5 moves, it causes the roller 14 to perform deflection / torsion motion, thereby simulating the deflection / torsion load applied to the rubber node.

[0048] This device can simulate different torsion angles and deflection angles by changing the track plate 11, and can simultaneously simulate different operating conditions such as tension / compression and deflection / torsion loads.

[0049] For ease of explanation, the orientations mentioned above are defined as follows: the directions mentioned above (up, down, left, right, front, back) are consistent with the directions of up, down, left, right, front, back in the projection relationship of the diagram itself.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] The above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and are not intended to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fatigue testing device for a train traction rod assembly, characterized in that, Includes a base (1), a first component (2), a second component (5), and a traction rod (20); The base (1) is located at the lower end of the fatigue test device. A first component (2) is installed on the upper end of the base (1), and a second component (5) is installed on one side of the first component (2). A traction rod (20) is installed between the first component (2) and the second component (5); The traction rod (20) has a first end (21) and a second end (22) at both ends. The first end (21) is installed inside the first component (2), and the second end (22) is installed inside the second component (5). Both the first end (21) and the second end (22) are provided with elastic rubber nodes. The second component (5) includes a connecting assembly (16), which is installed on one side of the limiting structure (6). The connecting assembly (16) includes a second connecting plate (17), a third base (19), and a second connector (18). The second connecting plate (17) is installed on one side of the guide rail (23) mounting plate. The third base (19) is installed on one side of the second connecting plate (17). A connecting rod (25) is installed on one side of the third base (19). The second connector (18) is installed on one side of the connecting rod (25). The first component (2) includes a first base (3) and a pressure plate (4). The first base (3) is located at the lower end of the first component (2), and the pressure plate (4) is located at the upper end of the first component (2). The pressure plate (4) is installed on the upper side of the first base (3). The first base (3) is installed on the upper side of the base (1), and the first base (3) has a first slot (26) in the middle, and the pressure plate (4) has a second slot (27) in the middle. The second component (5) also includes a limiting structure (6) and a pulley structure (13), wherein the limiting structure (6) is installed on the upper end of the base (1) and the pulley structure (13) is installed inside the limiting structure (6); The limiting structure (6) is mounted on the upper side of the base (1) via the guide rail (23). The limiting structure (6) includes a limiting component (7) and a track component (10). The limiting component (7) is mounted on the lower end of the limiting structure (6), and the track component (10) is mounted on the upper end of the limiting structure (6). The limiting component (7) is mounted on the lower side of the track component (10). A pulley structure (13) is installed in the preset slot of the track component (10). The limiting component (7) includes a slider (9) and a first connecting plate (8). The slider (9) is installed at the lower end of the limiting component (7) and on the upper side of the guide rail (23). The first connecting plate (8) is installed at the upper end of the limiting component (7) and on the upper side of the slider (9). The lower surface of the slider (9) is provided with a third slot (28), and the first connecting plate (8) is L-shaped.

2. The fatigue testing device for a train traction rod assembly according to claim 1, characterized in that, The track assembly (10) includes a track plate (11) and a track mounting plate (12). The track mounting plate (12) is mounted on the upper side of the first connecting plate (8). The track plate (11) is mounted in the middle of the track mounting plate (12). A first connector (24) is mounted on the upper side of the track mounting plate (12). The first connector (24) has elongated holes at both ends.

3. A fatigue testing device for a train traction rod assembly according to any one of claims 2, characterized in that, The lower end of the track mounting plate (12) is provided with a fourth slot 29, the middle part of the track mounting plate (12) is provided with a fifth slot (30), and the middle part of the track plate (11) is provided with a sixth slot (31).

4. The fatigue testing device for a train traction rod assembly according to claim 1, characterized in that, The pulley structure (13) includes a roller (14) and a second base (15). The roller (14) is installed in a pre-set slot in the track plate (11). The second base (15) is installed on one side of the roller (14). The second base (15) is installed on the side of the second end (22). A seventh slot (32) is opened on the second base (15).

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