Obstacle detection device with adjustable trigger threshold, bogie, and rail vehicle

Abstract

The present invention relates to the field of rail vehicle technology, and in particular to an obstacle detection device, bogie, and rail vehicle with an adjustable trigger threshold. The obstacle detection device includes: a frame, a leaf spring, and a sensor; the leaf spring includes a fixed plate and a movable plate, and the fixed plate is fixedly connected to the frame; the sensor includes a first sensing member and a second sensing member, the first sensing member is installed on the side of the movable plate of the leaf spring facing the frame, and the second sensing member is installed on the frame at a position corresponding to the first sensing member, and an adjustment gasket is provided between the first sensing member and the movable plate of the leaf spring for adjusting the relative position between the first sensing member and the second sensing member. The obstacle detection device solves the problem of missed triggering or false triggering caused by changes in the sensor triggering force value when the detection beam is at different heights from the rail surface, and greatly reduces the manufacturing difficulty and saves production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to an obstacle detection device with an adjustable trigger threshold, a bogie, and a rail vehicle. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] With the acceleration of urbanization and the increasing demand for urban transportation, urban rail transit is playing an increasingly important role in the field of public transportation. With the development of urban rail transit, considering the need for efficient operation and safety, obstacles on the running lines are extremely harmful. When encountering obstacles, destructive collisions may occur at the least, and serious accidents such as derailment may occur at the worst. Therefore, research on on-track obstacle detection has become necessary.

[0004] Currently, non-contact detection devices have been developed both domestically and internationally. These passive obstacle detection devices, installed on bogies, contain sensors. When the two sensing parts of the sensor are offset by a certain distance, the sensor disconnects the circuit, triggering the emergency brake to stop the train and ensure safe operation.

[0005] However, different routes require different heights between the detection beam and the rail surface; and after wheel wear, the detection beam needs to be lowered to maintain this height. These two factors cause the sensor's trigger force (which can be understood as the force exerted by obstacles) to vary, resulting in missed or false triggers. To ensure the trigger force remains constant at different detection arm heights and stiffnesses, this can be addressed by adjusting the leaf spring cross-section and heat treatment process. However, this approach significantly increases manufacturing difficulty and production costs. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide an obstacle detection device with an adjustable trigger threshold to solve the problem of missed triggering or false triggering caused by changes in the sensor trigger force value when the detection beam is at different heights from the rail surface, and greatly reduce the manufacturing difficulty and save production costs.

[0007] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0008] An obstacle detection device with an adjustable trigger threshold comprises: a frame, a leaf spring and a sensor; the leaf spring comprises a fixed plate and a movable plate, the fixed plate being fixedly connected to the frame; the sensor comprises a first sensing member and a second sensing member, the first sensing member being mounted on a side of the movable plate of the leaf spring facing the frame, the second sensing member being mounted on a position on the frame corresponding to the first sensing member, an adjustment gasket being provided between the first sensing member and the movable plate of the leaf spring for adjusting the relative position between the first sensing member and the second sensing member.

[0009] In another preferred embodiment of the present invention, the frame includes a back plate and two side plates, the two side plates are located on both sides of the back plate, the leaf spring is arranged between the two side plates, the fixing plate of the leaf spring is detachably connected to the back plate of the frame, and the second sensing member is installed on the inner side of the side plate.

[0010] In another preferred embodiment of the present invention, a support member is provided between the two side plates, the movable plate and the fixed plate of the leaf spring are connected by a connecting plate, and when the movable plate of the leaf spring is squeezed and deformed, the connection between the connecting plate and the movable plate is pressed against the support member.

[0011] In another preferred embodiment of the present invention, the first sensing element is the conductor part of the sensor, the second sensing element is the sensing part of the sensor, the conductor part is detachably mounted on the inner side of the movable plate, the frame side plate is provided with a mounting groove, and the sensing part is connected to the frame side plate through the mounting groove.

[0012] In another preferred embodiment of the present invention, the obstacle detection device is mounted on the detection beam via a mounting arm, a first tooth plate is mounted on the free end of the leaf spring movable plate, and a second tooth plate cooperating with the first tooth plate is provided on the mounting arm.

[0013] An embodiment of the present invention further provides a bogie, comprising a detection beam, on which the above-mentioned obstacle detection device with an adjustable trigger threshold is installed.

[0014] In another preferred embodiment of the present invention, the obstacle detection device is arranged in a detection box, and the detection box is mounted on the bogie body via a connecting seat.

[0015] In another preferred embodiment of the present invention, the detection beam is connected to the vehicle body chassis through a first anti-falling safety rope, and the detection beam is connected to the frame through a second anti-falling safety rope.

[0016] In another preferred embodiment of the present invention, the first anti-fall safety rope includes a rope body, with mounting seats provided at both ends of the rope body respectively connected to the detection beam and the vehicle body chassis, a rotating wheel is provided in the mounting seat, and both ends of the rope body are clamped on the rotating wheel.

[0017] An embodiment of the present invention further provides a rail vehicle, comprising the bogie described above.

[0018] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0019] When the height of the detection beam from the rail surface changes, the length of the leaf spring mounting arm varies, the leaf spring stiffness changes, and the change in leaf spring stiffness causes the sensor trigger force value to change. The present invention provides an adjustment gasket between the first sensing element of the sensor and the movable plate of the leaf spring. When the height of the detection beam changes or is adjusted, the initial distance between the first sensing element and the second sensing element of the sensor is adjusted, thereby ensuring that the trigger force value of the detection device remains unchanged after the height of the detection beam changes, avoiding the problems of false triggering due to insufficient triggering force and missed triggering due to exceeding the triggering force value. In addition, there is no need to change the parameters of the leaf spring and redesign a new structure, and there is no need to strictly control the leaf spring size and heat treatment process to ensure the trigger force value, which reduces the manufacturing difficulty, reduces the variety of products, and increases the versatility of parts.

[0020] Additional advantages of the present invention will be given in the description which follows, and in part will be obvious from the description which follows, or may be learned through practice of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding 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.

[0023] Figure 1 is a schematic diagram of an obstacle detection device according to an embodiment of the present invention installed on a detection beam;

[0024] Figure 2 is an enlarged view of the first sensing element of the obstacle detection device according to an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of an obstacle detection device according to an embodiment of the present invention with one side panel of the frame removed;

[0026] Figure 4 yes Figure 3 Schematic diagram from another angle;

[0027] Figure 5 is a schematic diagram of a first sensing element of an obstacle detection device according to an embodiment of the present invention;

[0028] Figure 6is a schematic diagram of a second sensing element of an obstacle detection device according to an embodiment of the present invention;

[0029] Figure 7 2. It is a schematic diagram of an anti-fall safety rope according to an embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of a bogie according to an embodiment of the present invention;

[0031] In the figure: 1. Obstacle detection device; 11. Frame; 111. Back plate; 112. Side plate; 113. Mounting slot; 12. Support member; 13. Leaf spring; 131. Connecting plate; 132. Movable plate; 14. First tooth plate; 16. Adjusting gasket; 17. First sensing element; 18. Second sensing element; 2. Detection box; 3. Mounting arm; 4. Detection beam; 5. First anti-fall safety rope; 51. Rope body; 52. Rotating wheel; 53. Mounting base; 6. Second anti-fall safety rope; 7. Connecting base;

[0032] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0034] The terms "install", "connect", "connect", "fix" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Thus, a feature designated "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0036] As described in the background, various factors can cause variations in the sensor's trigger force, leading to missed or false triggering. Adjusting the leaf spring significantly increases manufacturing difficulty and production costs. To address these technical issues, the present invention proposes an obstacle detection device with an adjustable trigger threshold.

[0037] like Figures 1-6As shown, an embodiment of the present invention describes an obstacle detection device 1 with an adjustable trigger threshold, which is characterized in that it includes: a frame 11, a leaf spring 13 and a sensor; the leaf spring 13 includes a fixed plate and a movable plate 132, and the fixed plate is fixedly connected to the frame 11; the sensor includes a first sensing member 17 and a second sensing member 18, the first sensing member 17 is installed on the side of the movable plate 132 of the leaf spring 13 facing the frame 11, and the second sensing member 18 is installed on the frame 11 at a position corresponding to the first sensing member 17, and an adjustment gasket 16 is provided between the first sensing member 17 and the movable plate 132 of the leaf spring 13 for adjusting the relative position between the first sensing member 17 and the second sensing member 18.

[0038] When encountering an obstacle in front of the track, the detection beam drives the leaf spring to deform. The first sensing element of the sensor is installed on the leaf spring, and the second sensing element of the sensor is installed on the frame. When the first sensing element and the second sensing element of the sensor are offset from each other by a predetermined distance, the sensor disconnects the circuit. After the train detects that the circuit is power-off, it triggers the emergency brake to stop the train, thereby ensuring driving safety.

[0039] When the height of the detection beam from the rail surface changes, the length of the leaf spring mounting arm varies, the leaf spring stiffness changes, and the change in leaf spring stiffness causes the sensor trigger force value to change. The present invention provides an adjustment gasket between the first sensing element of the sensor and the movable plate of the leaf spring. When the height of the detection beam changes or is adjusted, the initial distance between the first sensing element and the second sensing element of the sensor is adjusted, thereby ensuring that the trigger force value of the detection device remains unchanged after the height of the detection beam changes, avoiding the problems of false triggering due to insufficient triggering force and missed triggering due to exceeding the triggering force value. In addition, there is no need to change the parameters of the leaf spring and redesign a new structure, and there is no need to strictly control the leaf spring size and heat treatment process to ensure the trigger force value, which reduces the manufacturing difficulty, reduces the variety of products, and increases the versatility of parts.

[0040] like Figure 3 、 Figure 4 As shown, the frame 11 includes a back plate 111 and two side plates 112. The two side plates 112 are located on either side of the back plate 111. The leaf spring 13 is disposed between the two side plates 112. The fixed plate of the leaf spring 13 is detachably connected to the back plate 111 of the frame 11. The second sensing member 18 is mounted on the inner side of the side plates 112. The frame is semi-enclosed, and the leaf spring is located within the semi-enclosed frame. The movable plate of the leaf spring bends when subjected to an external force, causing the first sensing member and the second sensing member to be misaligned.

[0041] like Figure 3As shown, a support member 12 is provided between the two side plates 112. The movable plate 132 and the fixed plate of the leaf spring 13 are connected by a connecting plate 131. When the movable plate 132 of the leaf spring 13 is squeezed and deformed, the connection between the connecting plate 131 and the movable plate 132 presses against the support member 12. The support member is a cylindrical pipe. By providing the cylindrical support member, the movable plate is supported when it bends, the bending position of the movable plate is defined, and the detection accuracy is ensured.

[0042] like Figure 3 As shown in Figure 6, the first sensing element 17 is the conductor portion of the sensor, and the second sensing element 18 is the sensing portion of the sensor. The conductor portion is detachably mounted on the inner side of the movable plate 132. The side plate 112 of the frame 11 is provided with a mounting slot 113, and the sensing portion is connected to the frame side plate 112 through the mounting slot 113. The conductor portion is detachably connected to the movable plate by bolts, so that the adjustment shims of different thicknesses can be replaced after the height of the detection beam changes.

[0043] like Figure 1 、 Figure 3 As shown, the obstacle detection device 1 is mounted on the detection beam 4 via a mounting arm 3. A first toothed plate 14 is mounted on the free end of the movable plate 132 of the leaf spring 13. A second toothed plate is provided on the mounting arm 3 to cooperate with the first toothed plate 14. The cooperation between the first and second toothed plates facilitates adjustment of the relative position of the detection beam and the leaf spring.

[0044] Based on the above obstacle detection device, the present invention also provides a bogie, such as Figure 8 As shown, it includes a detection beam 4, on which the obstacle detection device 1 is installed. The obstacle detection device 1 is set in a detection box 2, which is installed on the bogie body through a connecting seat 7. The detection box plays a protective role for the obstacle detection device.

[0045] like Figure 7 As shown, the detection beam 4 is connected to the vehicle underframe via a first anti-fall safety rope 5, which in turn is connected to the frame 11 via a second anti-fall safety rope 6. The first anti-fall safety rope 5 comprises a rope body 51, with mounting brackets 53 at each end, respectively connecting the detection beam 4 and the vehicle underframe. The mounting brackets 53 are provided with rotating wheels 52, which are clamped onto the ends of the rope body 51. The anti-fall safety rope prevents the detection beam or frame from falling off after colliding with an obstacle and landing on the track, potentially impacting driving safety. The rotating wheels facilitate adjustment of the mounting brackets.

[0046] Based on the above-mentioned obstacle detection device, an embodiment of the present invention further provides a rail vehicle, which is provided with the obstacle detection device described in the above-mentioned embodiment. Since the above-mentioned obstacle detection device has the above-mentioned technical effects, the technical effects of the rail vehicle using the obstacle detection device please refer to the above-mentioned embodiment.

[0047] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. An obstacle detection device with an adjustable trigger threshold, characterized in that: include: frame, leaf springs, and sensors; The leaf spring includes a fixed plate and a movable plate, and the fixed plate is fixedly connected to the frame; The sensor includes a first sensing member and a second sensing member, wherein the first sensing member is mounted on a side of the movable plate of the leaf spring facing the frame, and the second sensing member is mounted on a position on the frame corresponding to the first sensing member. An adjustment gasket is provided between the first sensing member and the movable plate of the leaf spring for adjusting the relative position between the first sensing member and the second sensing member. The frame includes a back plate and two side plates, the two side plates are located on both sides of the back plate, the leaf spring is arranged between the two side plates, the fixing plate of the leaf spring is detachably connected to the back plate of the frame, and the second induction member is installed on the inner side of the side plate; The first sensing part is the conductor part of the sensor, and the second sensing part is the sensing part of the sensor. The conductor part can be detachably installed on the inner side of the movable plate to facilitate replacement of adjustment gaskets of different thicknesses after detecting changes in beam height. The frame side plate is provided with a mounting groove, and the sensing part is connected to the frame side plate through the mounting groove.

2. The obstacle detection device with adjustable trigger threshold according to claim 1, characterized in that: A support member is provided between the two side plates, the movable plate and the fixed plate of the leaf spring are connected via a connecting plate, and when the movable plate of the leaf spring is squeezed and deformed, the connection between the connecting plate and the movable plate presses against the support member.

3. The obstacle detection device with adjustable trigger threshold according to claim 1, characterized in that: The obstacle detection device is installed on the detection beam through a mounting arm, a first tooth plate is installed on the free end of the leaf spring movable plate, and a second tooth plate that cooperates with the first tooth plate is provided on the mounting arm.

4. A bogie, characterized in that: It comprises a detection beam, on which is mounted the obstacle detection device with an adjustable trigger threshold as described in any one of claims 1 to 3.

5. The bogie according to claim 4, characterized in that The obstacle detection device is arranged in a detection box, and the detection box is mounted on the bogie body through a connecting seat.

6. The bogie according to claim 4, wherein: The detection beam is connected to the vehicle body underframe through a first anti-falling safety rope, and the detection beam is connected to the frame through a second anti-falling safety rope.

7. The bogie according to claim 6, characterized in that The first anti-fall safety rope includes a rope body, with mounting seats provided at both ends of the rope body respectively connected to the detection beam and the vehicle body chassis, a rotating wheel is provided in the mounting seat, and both ends of the rope body are clamped on the rotating wheel.

8. A rail vehicle, characterized in that: Comprising a bogie as described in any one of claims 4-7.

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