Elastic anti-falling mechanism

Abstract

The invention provides an elastic anti-falling mechanism which is provided with an anti-falling hook base elastically hinged to the inner side of a fixed apron board and an inclined support fixed to the inner side of a movable apron board, the inclined support is provided with an extending part extending towards the interior of a vehicle, and the lower portion of the anti-falling hook base is provided with a supporting part used for bearing the extending part of the inclined support and a guiding part located on the outer side of the supporting part. The guide part is used for guiding the extending part of the inclined support to slide to the position above the supporting part when the movable apron board is closed. Through the arrangement of the inclined support and the anti-unhooking hook base, normal opening and closing of the movable apron board are not affected, meanwhile, once the hinge falls off, the downward movement displacement of the movable apron board can be controlled within 2 mm, and driving safety is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicle outer skirt, in particular to an elastic anti-falling mechanism. BACKGROUND

[0002] As a key protection component of the bottom of the car body, the rail vehicle skirt needs to consider both lightweight and reliability. The existing movable skirt uses hinges on the upper part and compression locks on the lower part, which limit the position of the skirt. Considering the failure rate of the hinge mechanism, a limiting rope is set on the upper part as an anti-falling mechanism for protection. In order to ensure that the skirt can be normally opened, the length of the limiting rope must not be less than 150mm. Once the hinge falls off, the movable skirt will move down by about 150mm. Although the limiting rope plays a role in preventing falling, the displacement is too large, which affects the safety of driving.

[0003] Chinese invention patent CN204978669U discloses a high-speed train skirt anti-falling device. A lock stop plate is connected to the bottom frame of the car body, and a anti-loose lock is installed on the skirt. When a four-corner key is used to loosen the four-corner lock, the lock tongue of the anti-loose lock will automatically lap on the lock stop plate, and the skirt will only open to a certain angle. Even if the train runs and the skirt vibrates, it will not fall off. If you want to completely open the skirt, you can use a four-corner key to turn the four-corner lock of the anti-loose lock to the "open" position. However, this scheme needs to use a four-corner key to manually operate the anti-loose lock, which is cumbersome and depends on a special tool to rotate the lock tongue to a horizontal state to completely open the skirt, increasing the maintenance time and affecting the repair efficiency in emergency situations. At the same time, there is a risk of potential wear and loose, and the lap joint point of the lock tongue and the L-shaped lock stop plate may gradually wear due to metal fatigue or vibration impact, weakening the anti-loose effect. After long-term use, the automatic lap mechanism of the lock tongue may fail, increasing the risk of falling. SUMMARY

[0004] The purpose of the present application is to overcome the problems of excessive displacement affecting driving safety when using the limiting rope scheme in the prior art, and the cumbersome operation affecting efficiency and the risk of wear and loose when using the L-shaped lock stop plate and anti-loose lock scheme in the prior art. An elastic anti-falling mechanism is provided. By setting the elastic hinge anti-falling hook seat and the inclined support, the movable skirt can be normally opened and closed without affecting the normal opening and closing of the movable skirt. At the same time, once the hinge falls off, the movable skirt will move down by less than 2mm, effectively ensuring the safety of driving.

[0005] To achieve the above object, the present application provides the following technical solutions: An elastic anti-falling mechanism characterized by having an anti-falling hook base elastically connected to the inner side of a fixed apron and an inclined support fixed to the inner side of a movable apron, the inclined support having an extension extending into the vehicle, the lower part of the anti-falling hook base having a support part for supporting the extension of the inclined support and a guide part located outside the support part, the guide part being used to guide the extension of the inclined support to above the support part when the movable apron is closed.

[0006] Further, the anti-falling hook base also has a tail extending into the vehicle, and an elastic support is provided between the tail of the anti-falling hook base and the fixed apron.

[0007] Further, the elastic support is a torsion spring sleeved on a hinge pin, one side of the torsion spring being fixed to the fixed apron and the other side of the torsion spring being fixed to the tail of the anti-falling hook base.

[0008] Further, the hinge pin is a rotating shaft, and the rotating shaft is rotatably provided with a fixed plate fixed to the fixed apron and a mounting plate fixedly connected to the anti-falling hook base.

[0009] Further, the extension of the inclined support has a downwardly inclined angle and has a contact surface below the extension for contacting the support part of the anti-falling hook base; the support part of the anti-falling hook base has an upwardly inclined angle and has a support surface above the support part for supporting the contact surface below the extension.

[0010] Further, the support surface and the contact surface are parallel to each other with a gap of 2mm when the movable apron is closed.

[0011] The present application has the following beneficial effects: 1. The anti-falling hook base and the inclined support elastically connected in the present application do not affect the normal opening and closing of the movable apron, and once the hinge falls off, the downward displacement of the movable apron is controlled within 2mm, avoiding the problem of excessive downward displacement in the prior art using a limiting rope, effectively ensuring driving safety. Through the arrangement of the elastic support, the elastic support can be self-adaptively locked, compensate for the displacement caused by vibration, maintain a constant pressing force, and avoid the gradual wear of the rigid lap joint point of the lock tongue and the L-shaped lock baffle due to metal fatigue or vibration impact, and the reliability is high under actual working conditions.

[0012] 2、The anti-unhooking seat and the inclined support structure are simple in structure, facilitate installation and maintenance, low in cost, can be quickly operated, simplify the opening and closing steps, and are favorable for improving the maintenance efficiency. The extension part of the inclined support can slide to above the supporting part of the anti-unhooking seat along the guide part when the movable apron is closed, and the closing of the movable apron and the starting of the anti-falling mechanism are completed in one step. When the movable apron is opened, the inclined support moves together with the movable apron, the front end of the extension part of the inclined support pushes the supporting part of the anti-unhooking seat, the elastic supporting piece is compressed, until the front end of the extension part of the inclined support is separated from the anti-unhooking seat, the elastic supporting piece gradually recovers from the compression to the natural state, and the opening of the movable apron and the release of the anti-falling mechanism are completed in one step. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0014] Figure 1 is a schematic view of the elastic anti-falling mechanism of the present application.

[0015] Figure 2 is a schematic view of the elastic anti-falling mechanism of the present application.

[0016] Figure 3 is a schematic view of the elastic anti-falling mechanism of the present application.

[0017] Figure 4 is a schematic view of the elastic anti-falling mechanism of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS 1, vehicle body; 2, fixed apron; 3, movable apron; 4, hinge; 5, compression lock; 6, anti-unhooking seat; 6-1, supporting part; 6-2, guide part; 6-3, tail part; 7, inclined support; 7-1, extension part; 7-2, fixed part; 8, torsional spring; 9, rotating shaft; 10, fixed plate; 11, mounting plate; 12, torsional spring pressing plate. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0020] Please refer to Figures 1 to 4As shown, the elastic anti-falling mechanism in the embodiment includes the inclined support 7 and the anti-falling hook base 6. The inclined support 7 is fixedly arranged on the inner side of the movable skirt plate 3, and the anti-falling hook base 6 is elastically connected below the fixed skirt plate 2. The fixed skirt plate 2 is fixedly connected with the vehicle body 1, the movable skirt plate 3 is hingedly connected below the fixed skirt plate 2 through the hinge 4, and the lower part of the movable skirt plate 3 is provided with the compression lock 5 for limiting the movement of the movable skirt plate 3 in the vehicle width direction.

[0021] Please refer to Figure 2 As shown, the lower part of the inclined support 7 has a fixed part 7-2 fixed on the inner side of the movable skirt plate 3, and the upper part of the inclined support 7 has an extension part 7-1 extending into the vehicle. The lower part of the anti-falling hook base 6 has a supporting part 6-1 for supporting the extension part 7-1 of the inclined support 7, and the outer side of the supporting part 6-1 has a guide part 6-2 for guiding the extension part 7-1 of the inclined support 7 to slide along the curve of the guide part 6-2 to above the supporting part 6-1 when the movable skirt plate 3 is closed. The anti-falling hook base 6 further has a tail part 6-3 connected with the supporting part 6-1 and extending into the vehicle, and the tail part 6-3 of the anti-falling hook base 6 is supported by an elastic support between the fixed skirt plate 2. Through the arrangement of the elastic support, the supporting part 6-1 of the anti-falling hook base 6 can always be kept below the extension part 7-1 of the inclined support 7 in the closed state of the movable skirt plate 3, for supporting the movable skirt plate 3 and the inclined support 7 that may fall; at the same time, it can compensate for the displacement caused by vibration, maintain a constant compression force, and avoid damage to the supporting part 6-1 and the extension part 7-1 due to rigid collision caused by vibration, and has strong reliability in actual working conditions.

[0022] The anti-falling hook base 6 is elastically connected to the fixed skirt plate 2 through the fixed plate 10, the mounting plate 11 and the elastic support. The fixed plate 10, the mounting plate 11 and the elastic support are rotationally connected through the rotating shaft 9, the fixed plate 10 is fixedly connected with the fixed skirt plate 2 through bolts, and the anti-falling hook base 6 is fixedly arranged on the mounting plate 11 through bolts. In the embodiment, the elastic support is a torsion spring 8, which has a certain torsion force in the natural state, so that the anti-falling hook base 6 presents a certain angle and can withstand a certain external force. One side of the torsion spring 8 is fixed on the fixed skirt plate 2 through a torsion spring pressing plate 12, and is on the same straight line with the fixed plate 10; the other side of the torsion spring 8 is fixed on the upper surface of the tail part 6-3 of the anti-falling hook base 6, and is at a certain angle with the mounting plate 11. When the anti-falling hook base 6 is subjected to an external force greater than the torsion force of the torsion spring 8, the anti-falling hook base 6 can rotate around the rotating shaft 9; in another embodiment, the elastic support can be replaced by a tension spring and a compression spring.

[0023] In this embodiment, the extension 7-1 of the inclined bracket 7 has a downward inclination angle of 5°, and the recommended range of the inclination angle is 3° to 10°. For different angles, the length of the extension 7-1 and the force value of the torsion spring 8 can be adjusted. The extension 7-1 has a contact surface below for contacting the support portion 6-1 of the anti-falling hook base 6; the support portion 6-1 of the anti-falling hook base 6 has an upward inclination angle, and the support portion 6-1 has a support surface above for supporting the contact surface below the extension 7-1, so that when the movable apron 3 falls off, the movable apron 3 and the inclined bracket 7 can be prevented from tilting outward under the action of gravity and the inclination angle. The support surface of the support portion 6-1 and the contact surface of the extension 7-1 are parallel to each other and have a gap of 2 mm when the movable apron 3 is closed. Once the hinge fails, the downward displacement of the movable apron can be controlled within 2 mm, avoiding excessive downward displacement that affects driving safety.

[0024] Please refer to Figure 2 , 3 When the hinge 4 fails, the movable apron 3 and the fixed apron 2 are disconnected at the hinge, the movable apron 3 has a tendency to fall and tilt due to gravity and vibration, and the lower part of the movable apron 3 is connected to the vehicle body 1 by the compression lock 5 and cannot move in the vehicle width direction under the action of the compression lock 5, but naturally falls in the vehicle height direction due to gravity; at this time, the inclined bracket 7 on the movable apron 3 falls onto the anti-falling hook base 6 on the fixed apron 2, the upward support surface of the support portion 6-1 of the anti-falling hook base 6 contacts the downward contact surface of the extension 7-1 of the inclined bracket 7, and the stability of the contact is ensured by the surface contact; at this time, the torsion of the torsion spring 8 causes the lower part of the guide portion 6-2 of the anti-falling hook base 6 to abut against the fixed portion 7-2 of the inclined bracket 7, and the support portion 6-1 of the anti-falling hook base 6 abuts against the extension 7-1 of the inclined bracket 7, thereby limiting the downward falling of the movable apron 3 in the height direction. In addition, the existence of the inclination angles of the extension 7-1 and the support portion 6-1 further limits the tendency of the movable apron 3 to tilt outward.

[0025] Please refer to Figure 2 , 4 When the hinge 4 functions normally: open the movable apron 3, at this time the inclined bracket 7 moves together with the movable apron 3, the front end of the extension 7-1 of the inclined bracket 7 pushes the support portion 6-1 of the anti-falling hook base 6 downward and causes the support portion 6-1 and the guide portion 6-2 to slide relative to each other, and the torsion spring 8 is compressed, until the position shown in Figure 4 , the front end of the extension 7-1 of the inclined bracket 7 is separated from the guide portion 6-2 of the anti-falling hook base 6, and the movable apron 3 is continuously opened, the torsion spring 8 gradually recovers from compression to a natural state, the movable apron 3 is opened, and the anti-falling mechanism is released.

[0026] When closing the movable skirt 3, first the front end of the extension 7-1 of the inclined support 7 presses the guide 6-2 of the anti-falling hook base 6 and slides relative to the guide 6-2, at this time the torsion spring 8 is compressed; during the closing process, the extension 7-1 of the inclined support 7 slides along the guide 6-2 of the anti-falling hook base 6 to the support 6-1 of the anti-falling hook base 6, until it reaches the position as shown in Figure 4 Fig. 6, then continues to close the movable skirt 3, the torsion spring 8 gradually recovers from compression to the natural state, the extension 7-1 of the inclined support 7 moves above the support 6-1 of the anti-falling hook base 6, the movable skirt 3 is closed, and the anti-falling mechanism is activated.

[0027] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elastic anti-drop mechanism, characterized in that The anti-unhooking seat (6) is elastically connected to the inner side of the fixed skirt plate (2), and the inclined support (7) is fixed to the inner side of the movable skirt plate (3), the inclined support (7) has an extension (7-1) extending into the vehicle, the lower part of the anti-unhooking seat (6) has a supporting part (6-1) for supporting the extension (7-1) of the inclined support (7) and a guiding part (6-2) located outside the supporting part (6-1), the guiding part (6-2) is used to guide the extension (7-1) of the inclined support (7) to slide above the supporting part (6-1) when the movable skirt plate (3) is closed.

2. The elastic anti-drop mechanism according to claim 1, wherein: The anti-unhooking seat (6) further has a tail part (6-3) extending into the vehicle, and an elastic support is arranged between the tail part (6-3) of the anti-unhooking seat (6) and the fixed skirt plate (2).

3. The elastic anti-drop mechanism according to claim 2, wherein: The elastic support is a torsion spring (8) sleeved on a hinge pin, one side of the torsion spring (8) is fixed to the fixed skirt plate (2), and the other side of the torsion spring (8) is fixed to the tail part (6-3) of the anti-unhooking seat (6).

4. The elastic anti-drop mechanism according to claim 3, wherein: The hinge pin is a rotating shaft (9), the rotating shaft (9) is rotatably provided with a fixed plate (10) fixed to the fixed skirt plate (2) and a mounting plate (11) fixedly connected with the anti-unhooking seat (6).

5. The elastic anti-drop mechanism according to claim 3, wherein: The elastic support can be replaced by a tension spring and a compression spring.

6. The elastic anti-drop mechanism according to claim 1, wherein: The extension (7-1) of the inclined support (7) has a downward inclined angle, and the lower part of the extension (7-1) has a contact surface for contacting the supporting part (6-1) of the anti-unhooking seat (6); the supporting part (6-1) of the anti-unhooking seat (6) has an upward inclined angle, and the upper part of the supporting part (6-1) has a supporting surface for supporting the contact surface of the lower part of the extension (7-1).

7. The elastic anti-drop mechanism according to claim 6, wherein: The supporting surface and the contact surface are parallel to each other with a gap of 2mm when the movable skirt plate (3) is closed.

8. The elastic anti-drop mechanism according to claim 6, wherein: The downward inclined angle of the extension (7-1) is 3° to 10°.

9. The elastic detangling mechanism of claim 1, wherein: The inclined support (7) further has a fixed part (7-2) fixed to the inner side of the movable skirt plate (2), and the fixed part (7-2) of the inclined support (7) is used to abut against the guiding part (6-2) of the anti-unhooking seat (6).

10. The elastic anti-drop mechanism of claim 1, wherein: The fixed skirt plate (2) is fixedly connected with the vehicle body (1), the movable skirt plate (3) is hingedly connected below the fixed skirt plate (2), and the lower part of the movable skirt plate (3) is provided with a compression lock (5) for limiting the movement of the movable skirt plate (3) in the vehicle width direction.

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