A spring plate for an obstacle detection device

Abstract

This utility model relates to the field of rail transit technology, and in particular to a spring plate for an obstacle detection device, comprising a horizontal plate, wherein one end of the horizontal plate is bent downward to form a bogie support connection part, and the other end is bent downward to form a crossbeam toothed plate connection part, and the bending areas at both ends of the horizontal plate are arc-shaped; the thickness of the crossbeam toothed plate connection part is less than the thickness of the horizontal plate, and the thickness of the arc-shaped bending area between the two gradually decreases along a first preset direction. While satisfying the original performance, this utility model adopts a gradually changing wall thickness structural design, which enhances the stability of the spring plate under high-frequency, high-amplitude random vibration environments, reduces stress concentration in the bolt hole area, and delays the generation and propagation of fatigue cracks, thereby solving the problem of early fracture of spring plates due to stress accumulation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a spring plate for an obstacle detection device. Background Technology

[0002] In rail transit systems, obstacle detection devices are crucial for ensuring the safety of train operation. Currently, a widely used obstacle detection mechanism is based on a design that combines a spring plate with a sensor, such as the obstacle detection device for rail vehicles disclosed in utility model publication number CN205737582U.

[0003] As the line continues to operate, road conditions become increasingly complex, and the random vibrations faced by the obstacle detection device become more and more intense. During train operation, the crossbeam is subjected to the same speed as the train. When encountering random vibrations, the crossbeam will swing irregularly due to inertia. This swinging is transmitted to the spring plates, causing deformation. Increasingly intense vibrations will cause the crossbeam's swing amplitude to increase and its frequency to rise, resulting in greater elastic deformation of the spring plates at an increasingly frequent frequency.

[0004] Under these operating conditions, existing obstacle detection devices for rail vehicles exhibit several problems. For example, when the deformable side of the U-shaped spring plate (i.e., the side connecting to the crossbeam) undergoes elastic deformation, its fixed side (i.e., the side connecting to the bogie support) also tends to deform. However, because the bolts restrict this deformation, the unreleased energy is converted into shear stress concentrated around the bolt holes. Frequent deformation processes lead to the gradual accumulation of shear stress in these areas, ultimately accelerating the exhaustion of the spring plate's fatigue life and causing fatigue cracks to form around the bolt holes. Over time, these cracks further propagate, eventually leading to the spring plate's fracture. Utility Model Content

[0005] In view of this, the present invention proposes a spring plate for an obstacle detection device. While meeting the original performance requirements, it adopts a gradually thickened wall design, which enhances the stability of the spring plate under high-frequency, high-amplitude random vibration environment, reduces stress concentration in the bolt hole area, and delays the generation and propagation of fatigue cracks. This solves the problem of early fracture caused by stress accumulation in the spring plate in the prior art, and improves the reliability and service life of the obstacle detection device.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model provides a spring plate for an obstacle detection device, comprising a horizontal plate, wherein...

[0008] One end of the cross plate is bent downward to form a bogie support connection part, and the other end is bent downward to form a crossbeam tooth plate connection part. The bending areas at both ends of the cross plate are arc-shaped.

[0009] The thickness of the crossbeam toothed plate connecting part is less than the thickness of the cross plate, and the thickness of the arc-shaped bending area between the two gradually decreases along the first preset direction. The thickness of the cross plate is equal to the thickness of the bogie support connecting part.

[0010] The first preset direction is the arc extension direction from the arc starting point on the side of the cross plate to the arc ending point on the side of the crossbeam toothed plate connection.

[0011] Based on the above technical solutions, preferably, the thickness of the arc-shaped bending area between the cross plate and the bogie support connection is equal to the thickness of the cross plate.

[0012] Based on the above technical solutions, preferably, the width of the horizontal plate is equal to the width of the bogie support connection part and the width of the arc-shaped bending area at both ends of the horizontal plate.

[0013] Based on the above technical solutions, preferably, the width of the top of the crossbeam toothed plate connecting part is greater than the width of the bottom, and the width of the top of the crossbeam toothed plate connecting part is equal to the width of the cross plate.

[0014] Based on the above technical solutions, preferably, the top of the crossbeam toothed plate connecting part is an inverted isosceles trapezoid, and the bottom is rectangular.

[0015] Based on the above technical solutions, preferably, the thickness of the bogie support connection is at least 1.5 times the thickness of the crossbeam toothed plate connection.

[0016] Based on the above technical solutions, preferably, the bogie support connection part and the crossbeam toothed plate connection part are both perpendicular to the cross plate.

[0017] Based on the above technical solutions, preferably, the bottom of the bogie support connection part is provided with a number of support mounting holes.

[0018] Based on the above technical solutions, preferably, the bottom of the crossbeam toothed plate connecting part is provided with a number of toothed plate mounting holes.

[0019] Based on the above technical solutions, preferably, both the support mounting hole and the toothed plate mounting hole are circular through holes.

[0020] The spring plate of the obstacle detection device of this utility model has the following advantages over the prior art:

[0021] (1) By setting the bending areas at both ends of the horizontal plate to be arc-shaped, and the thickness of the connecting part of the crossbeam toothed plate is less than the thickness of the horizontal plate, and the thickness gradually decreases along the first preset direction in the arc-shaped bending area between the two, a gradually increasing stiffness structure is formed from the deformation side to the fixed side. This structure ensures the sensitivity of the connecting part of the crossbeam toothed plate while improving the overall fatigue resistance and structural stability of the spring plate, effectively alleviating the stress concentration problem caused by high-frequency vibration, reducing the shear stress accumulation in the bolt hole area, thereby delaying the generation and propagation of fatigue cracks, and improving the reliability and service life of the obstacle detection device.

[0022] (2) By setting the top width of the crossbeam toothed plate connection part to be greater than the bottom width, and the top width to be equal to the width of the cross plate, a transition structure that is wider at the top and narrower at the bottom is formed. This ensures the structural continuity of the connection area with the cross plate and reduces the lower mass, which is beneficial to reducing the amplitude of inertial sway. Without affecting the connection strength, this structure optimizes the force transmission path, reduces the ineffective deformation caused by vibration, thereby reducing the probability of sensor false triggering and improving the dynamic response performance of the structure. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of a spring plate for an obstacle detection device according to the present invention;

[0025] Figure 2 This is a side view of a spring plate for an obstacle detection device according to the present invention;

[0026] Figure 3 This is a schematic diagram illustrating the application state of a spring plate for an obstacle detection device according to the present invention;

[0027] In the figure: 1. Cross plate; 11. Bogie support connection part; 12. Crossbeam toothed plate connection part; 1101. Support mounting hole; 1201. Toothed plate mounting hole. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figure 1-3 As shown, a spring plate for an obstacle detection device of the present invention includes a horizontal plate 1, one end of which is bent downward to form a bogie support connection part 11, and the other end is bent downward to form a crossbeam toothed plate connection part 12. The bending areas at both ends of the horizontal plate are arc-shaped.

[0030] The thickness of the crossbeam toothed plate connecting portion 12 is less than the thickness of the cross plate 1, and the thickness of the arc-shaped bending area between the two gradually decreases along a first preset direction. The thickness of the cross plate is equal to the thickness of the bogie support connecting portion 11. The first preset direction is the arc extension direction from the arc starting point on the side of the cross plate 1 to the arc ending point on the side of the crossbeam toothed plate connecting portion 12.

[0031] In terms of structural function, the bogie support connection 11 is fixed to the bogie support by four bolts, serving as the fixed side; the crossbeam toothed plate connection 12 is a cantilever structure, serving as the deformable side, which connects the crossbeam to receive external forces and generate deformation, thereby triggering the sensor. The fixed side is thickened, while the deformable side maintains its original thickness. Specifically, the thickness of the bogie support connection 11 is at least 1.5 times the thickness of the crossbeam toothed plate connection 12.

[0032] The aforementioned structure ensures good trigger sensitivity on the deformable side of the spring plate, while the fixed side gradually increases stiffness through a gradient structure, thereby improving the overall fatigue resistance of the structure. This gradient design effectively alleviates stress concentration caused by high-frequency vibration, reduces shear stress accumulation in the bolt hole area, delays the initiation and propagation of fatigue cracks, and enhances the reliability and service life of the obstacle detection device.

[0033] In addition, the bogie support connection part 11 formed by the arc bending at both ends of the cross plate 1 and the crossbeam tooth plate connection part 12 are both perpendicular to the cross plate 1, so that the three together form a U-shaped leaf spring structure.

[0034] Furthermore, the thickness of the arc-shaped bending area between the horizontal plate 1 and the bogie support connection 11 is equal to the thickness of the horizontal plate 1. The width of the horizontal plate 1 is equal to the width of the bogie support connection 11, as well as the width of the arc-shaped bending areas at both ends of the horizontal plate 1.

[0035] This structure ensures the continuity and consistency of the fixed side and the overall structure of the transverse plate 1, avoiding stress concentration problems caused by abrupt changes in thickness or width. The uniformity of the structure enhances the load-bearing capacity of the spring plate on the fixed side, improves its structural stability under long-term vibration conditions, and further extends the service life of the spring plate.

[0036] The top of the crossbeam toothed plate connecting part 12 is an inverted isosceles trapezoid, and the bottom is rectangular, such that its top width is greater than its bottom width. Simultaneously, the width of the top of the crossbeam toothed plate connecting part 12 is set to be equal to the width of the cross plate 1, thereby forming... Figure 1 The structure shown is wider at the top and narrower at the bottom.

[0037] This structure ensures the structural continuity of the connection area between the crossbeam toothed plate connector 12 and the cross plate 1, while also reducing its lower mass, which helps to reduce the amplitude of inertial sway. Without affecting the connection strength, the force transmission path is optimized, reducing ineffective deformation caused by vibration, thereby reducing the probability of sensor false triggering and improving the dynamic response performance of the structure.

[0038] In the spring plate of the aforementioned obstacle detection device, the bottom of the bogie support connection part 11 is provided with several support mounting holes 1101. The bottom of the crossbeam toothed plate connection part 12 is provided with several toothed plate mounting holes 1201. Both the support mounting holes 1101 and the toothed plate mounting holes 1201 are circular through holes, which meet the installation requirements of standard fasteners.

[0039] This porous structure enhances the stability and shear resistance of the connection, effectively distributing bolt preload and working load to prevent loosening or fatigue failure. The circular through-hole structure distributes stress evenly, eliminating stress concentration at sharp corners, which helps extend the fatigue life of the hole edge area. It also facilitates later maintenance and replacement, improving the product's practicality and economy.

[0040] The method of using the spring plate of the obstacle detection device of this utility model is as follows:

[0041] First, the lower end of the bogie support connecting part 11 is fixed to the bogie support with bolts. Then, the lower end of the crossbeam tooth plate connecting part 12 is fixed to the crossbeam with bolts.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spring plate for an obstacle detection device, characterized by: Including the horizontal plate (1), wherein, One end of the horizontal plate (1) is bent downward to form a bogie support connection part (11), and the other end is bent downward to form a crossbeam tooth plate connection part (12). The bending areas at both ends of the horizontal plate (1) are arc-shaped. The thickness of the crossbeam tooth plate connecting part (12) is less than the thickness of the cross plate (1), and the thickness of the arc-shaped bending area between the two gradually decreases along the first preset direction. The thickness of the cross plate (1) is equal to the thickness of the bogie support connecting part (11). The first preset direction is the arc extension direction from the arc starting point on the side of the horizontal plate (1) to the arc ending point on the side of the crossbeam tooth plate connection (12).

2. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The thickness of the arc-shaped bending area between the horizontal plate (1) and the bogie support connection (11) is equal to the thickness of the horizontal plate (1).

3. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The width of the horizontal plate (1) is equal to the width of the bogie support connection part (11) and the width of the arc-shaped bending area at both ends of the horizontal plate (1).

4. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The width of the top of the crossbeam toothed plate connecting part (12) is greater than the width of the bottom, and the width of the top of the crossbeam toothed plate connecting part (12) is equal to the width of the cross plate (1).

5. The spring plate for an obstacle detection device as described in claim 4, characterized in that: The top of the crossbeam toothed plate connecting part (12) is an inverted isosceles trapezoid, and the bottom is rectangular.

6. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The thickness of the bogie support connection (11) is at least 1.5 times the thickness of the crossbeam tooth plate connection (12).

7. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The bogie support connection (11) and the crossbeam tooth plate connection (12) are both perpendicular to the cross plate (1).

8. The spring plate for an obstacle detection device as described in claim 1, characterized in that: The bottom of the bogie support connection part (11) is provided with several support mounting holes (1101).

9. A spring plate for an obstacle detection device as described in claim 8, characterized in that: The bottom of the crossbeam toothed plate connecting part (12) is provided with several toothed plate mounting holes (1201).

10. A spring plate for an obstacle detection device as described in claim 9, characterized in that: Both the support mounting hole (1101) and the toothed plate mounting hole (1201) are circular through holes.

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