A locking mechanism for decorative covers at the ends of handrails in subway cars

Abstract

This utility model provides a locking mechanism for decorative covers at the ends of handrails in subway cars. It relates to the technical field of subway car accessories. The locking mechanism includes internally threaded sleeves threaded onto both ends of the handrail. A decorative upper cover is fixedly installed at the far ends of the two internally threaded sleeves. Two decorative lower covers are slidably mounted on the handrail, with their far ends extending into the two decorative upper covers. The outer ring walls of the two decorative lower covers contact the inner ring walls of the two decorative upper covers. Limiting grooves are formed on the outer ring walls of both internally threaded sleeves. Four transverse support rods arranged in a circular array are provided inside each of the two decorative lower covers. This utility model prevents the decorative covers from detaching from the handrail, ensuring a secure installation.

Description

Technical Field

[0001] This utility model relates to the technical field of subway car accessories, specifically a locking mechanism for decorative covers at the ends of subway car handrails. Background Technology

[0002] Handrails are an important safety feature in subway cars. Decorative caps are usually installed at the ends of the handrails, both for aesthetic purposes and to prevent passengers from touching the sharp ends when gripping them.

[0003] However, decorative covers are typically screwed onto the ends of handrails, covering them while also serving a decorative purpose. During subway operation, factors such as vehicle vibration and frequent handrail gripping can cause these covers to loosen or even detach. This not only affects the aesthetics of the carriage interior but also poses potential safety hazards, such as a detached cover potentially injuring a passenger, and the lack of a locking mechanism for safety.

[0004] Therefore, it is necessary to provide a new locking mechanism for the decorative cover at the end of the handrail in a subway car to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a locking mechanism for the end decorative cover of the subway car handrail that can prevent the decorative cover from falling off the handrail and ensure that the installation is secure.

[0006] To solve the above-mentioned technical problems, the present invention provides a locking mechanism for decorative covers at the ends of subway car handrails, comprising: internally threaded sleeves threaded onto both ends of the handrail; decorative upper covers fixedly installed at the ends of the two internally threaded sleeves that are far apart from each other; two decorative lower covers slidably mounted on the handrail; the ends of the two decorative lower covers that are far apart from each other extending into the two decorative upper covers respectively; and the outer ring walls of the two decorative lower covers respectively contacting the inner ring walls of the two decorative upper covers; a limiting annular groove is formed on the outer ring wall of each of the two internally threaded sleeves; and four annular grooves are provided inside each of the two decorative lower covers. The array consists of eight horizontal support rods, each with one inward end fixedly connected to the handrail. Each of the eight horizontal support rods has a slidably mounted connecting strip. Each of the two decorative lower covers contains four limiting blocks arranged in a circular array. The eight connecting strips are respectively fixedly connected to the eight limiting blocks. The inward-facing side of each of the eight limiting blocks extends into the corresponding limiting ring groove. Each of the eight horizontal support rods is fitted with a first tension spring, one end of which is fixedly connected to the handrail, and the other end of which is fixedly connected to the eight connecting strips.

[0007] Preferably, each of the two decorative lower covers has a sliding hole, the handrail passes through the two sliding holes and does not contact the inner wall of the sliding hole, both ends of the handrail have mounting countersunk holes, each of the two mounting countersunk holes has a fixed column, each of the two columns has a cross connecting strip slidably mounted on it, the eight ends of each of the two cross connecting strips extend to the outside of the handrail and are fixedly connected to the inner wall of the sliding hole, and the cross connecting strips are slidably connected to the handrail, each of the two decorative lower covers has four push plates arranged in a circular array fixedly mounted on its inner wall, the side of each of the eight push plates away from the decorative upper cover is designed with a bevel, each of the eight limiting blocks has a push groove, the eight push grooves are adapted to the bevel of each of the eight push plates, each of the two columns is fitted with a second tension spring, the ends of the two second tension springs that are close to each other are fixedly connected to the inner wall of the two mounting countersunk holes that are close to each other, and the ends of the two second tension springs that are far from each other are fixedly connected to the two cross connecting strips.

[0008] Preferably, each of the two columns has a locking piece fixedly installed at one end that is far apart from the other, and the two cross connecting strips are in contact with the two locking pieces respectively.

[0009] Preferably, the handrail has eight slides, and the eight ends of the two cross connecting strips all pass through the corresponding slides and contact the inner wall of the corresponding slides.

[0010] Preferably, two blocking collars are slidably sleeved on the handrail, and the ends of the two blocking collars that are far apart from each other abut against the sides of the two decorative lower covers that are close to each other. Each of the two blocking collars is threaded with a fastening screw, and the ends of the two fastening screws abut against the handrail.

[0011] Preferably, each of the eight limiting blocks has a first inclined surface on its inward-facing side, and each of the two internal threaded sleeves has a second inclined surface on its side that is close to each other, and the two second inclined surfaces are adapted to the corresponding first inclined surfaces.

[0012] Preferably, two pull tabs are fixedly installed on the side of each of the two decorative lower covers that are close to each other.

[0013] Compared with related technologies, the locking mechanism for the decorative cover at the end of the subway car handrail provided by this utility model has the following advantages: This invention achieves the locking function of the decorative top cover by opening a limiting ring groove on the outer ring wall of the internal threaded sleeve and inserting a limiting block that is perpendicular to the internal threaded sleeve into the limiting ring groove, thus preventing it from being rotated and avoiding loosening or falling off, thereby improving safety performance. In addition, the decorative top cover and the decorative bottom cover can form a complete decorative effect, ensuring aesthetic appeal. Attached Figure Description

[0014] Figure 1 A schematic diagram of the locking mechanism for the decorative cover at the end of the subway car handrail provided by this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a cross-sectional view of the decorative upper cover, decorative lower cover, and handrail of this utility model. Figure 4 This is a schematic diagram showing the distribution of the limiting blocks in this utility model; Figure 5 This is a schematic diagram of the internal structure of the mounting countersunk hole in this utility model; Figure 6 This is a schematic diagram of the limiting annular groove in this utility model; Figure 7 This is a schematic diagram of the connection structure between the decorative lower cover and the cross-shaped connecting strip in this utility model.

[0015] The following are labeled in the diagram: 1. Handrail; 2. Mounting countersunk hole; 3. Decorative top cover; 4. Internal threaded sleeve; 5. Limiting ring groove; 6. Decorative bottom cover; 7. Horizontal support rod; 8. Connecting strip; 9. First tension spring; 10. Limiting insert; 11. Pushing groove; 12. Pushing pressure plate; 13. Column; 14. Cross connecting strip; 15. Positioning piece; 16. Second tension spring; 17. Blocking collar. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figures 1-7The locking mechanism for the decorative cover at the end of the subway car handrail includes: internally threaded sleeves 4 threaded onto both ends of the handrail 1, with decorative upper covers 3 fixedly installed at the ends of the two internally threaded sleeves 4 that are far apart from each other; two decorative lower covers 6 slidably mounted on the handrail 1, with two pull ears fixedly installed on the sides of the two decorative lower covers 6 that are close to each other for easy pulling; the ends of the two decorative lower covers 6 that are far apart from each other extend into the two decorative upper covers 3, and the outer ring walls of the two decorative lower covers 6 contact the inner ring walls of the two decorative upper covers 3, thus forming a relatively complete decorative effect and ensuring aesthetics; limit ring grooves 5 are formed on the outer ring walls of the two internally threaded sleeves 4; four transverse support rods 7 arranged in a circular array are provided in the two decorative lower covers 6; the inward ends of the eight transverse support rods 7 are fixedly connected to the handrail 1; connecting strips 8 are slidably mounted on the eight transverse support rods 7; and four limit inserts 10 arranged in a circular array are provided in the two decorative lower covers 6, with the eight connecting strips 8 respectively connecting to the eight limit inserts 10. The eight limiting blocks 10 are fixedly connected, and the inward side of each of the eight limiting blocks 10 extends into the corresponding limiting ring groove 5. Utilizing the insertion effect between the limiting blocks 10 and the limiting ring groove 5, the internal threaded sleeve 4 threaded onto the handrail 1 is restricted and cannot rotate in this state, thus ensuring that the decorative cover 3 can be stably installed at the end of the handrail 1. Each of the eight transverse support rods 7 is fitted with a first tension spring 9, one end of each of the eight first tension springs 9 being fixedly connected to the handrail 1. The other end of 9 is fixedly connected to eight connecting strips 8 respectively. Utilizing the elastic effect of the first tension spring 9, the limiting plug 10 can be stably installed in the limiting ring groove 5. Furthermore, each of the eight limiting plugs 10 corresponds to a first tension spring 9, which can provide a pushing force to the four limiting plugs 10 along the circumference of the limiting ring groove 5. Therefore, there is no need to worry that the elastic force of a certain first tension spring 9 will pull the corresponding limiting plug 10 out of the limiting ring groove 5, causing other limiting plugs 10 to also move out of the limiting ring groove 5, thus ensuring the locking effect.

[0018] In the above method, to facilitate and quickly bring each limiting insert 10 out of the corresponding limiting ring groove 5, sliding holes are provided on both decorative lower covers 6. The handrail 1 passes through the two sliding holes and does not contact the inner wall of the sliding holes. Mounting countersunk holes 2 are provided at both ends of the handrail 1. A column 13 is fixedly installed in each of the two mounting countersunk holes 2. A cross connecting strip 14 is slidably installed on each of the two columns 13. The eight ends of the two cross connecting strips 14 extend to the outside of the handrail 1 and are fixedly connected to the inner wall of the sliding hole. Furthermore, the cross connecting strip 14 is slidably connected to the handrail 1. Four push-pressure plates 12 arranged in a circular array are fixedly installed on the inner walls of both decorative lower covers 6. The side of each of the eight push-pressure plates 12 furthest from the decorative upper cover 3 is designed with an angled edge. Each of the eight limiting inserts 10 has a push-in groove 11, which is adapted to the angled edge of each of the eight push-pressure plates 12. Each of the two uprights 13 is fitted with a second tension spring 16, with the ends of the two second tension springs 16 close to each other respectively connected to two mounting countersunk holes 2. The inner walls on the sides that are close to each other are fixedly connected. The ends of the two second tension springs 16 that are far apart from each other are respectively fixedly connected to the two cross connecting strips 14. By pulling the decorative lower cover 6, the multiple limiting blocks 10 can be quickly and synchronously pulled out of the limiting ring groove 5 by the cooperation of the top push plate 12 and the top push inclined groove 11, which improves the convenience of operation. In addition, a locking piece 15 is fixedly installed at the ends of the two columns 13 that are far apart from each other. The two cross connecting strips 14 are respectively in contact with the two locking pieces 15. The sliding sleeve is provided with two blocking collars 17. The ends of the two blocking collars 17 that are far apart from each other abut against the sides of the two decorative lower covers 6 that are close to each other. Both blocking collars 17 are threaded with fastening screws. The ends of the two fastening screws abut against the armrest 1, which can provide a blocking effect for the cross connecting bar 14 in terms of up and down position. Without using the push plate 12 to bring the limiting insert 10 out of the limiting ring groove 5, the decorative lower cover 6 can be fixed by the locking piece 15 and the blocking collars 17.

[0019] In addition, eight slides are provided on the handrail 1. The eight ends of the two cross connecting strips 14 pass through the corresponding slides and contact the inner wall of the corresponding slides, which can provide sliding space for the cross connecting strips 14. The blocking collar 17 can also cover the slide, which can cover it and make it invisible from the outside, thus ensuring the aesthetics.

[0020] In this method, in order to enable the limiting insert 10 to automatically and smoothly spring into the limiting ring groove 5, a first inclined surface is provided on the inward side of each of the eight limiting inserts 10, and a second inclined surface is provided on the side of each of the two internal threaded sleeves 4 that are close to each other. The two second inclined surfaces are adapted to the corresponding first inclined surfaces. When the internal threaded sleeve 4 is screwed onto the end of the handrail 1, the contact effect of the first and second inclined surfaces can be used to automatically bring the limiting insert 10 into the limiting ring groove 5 by simply rotating the internal threaded sleeve 4, with the cooperation of the first tension spring 9. The operation is relatively convenient.

[0021] The working principle of the locking mechanism for the decorative cover at the end of the subway car handrail provided by this utility model is as follows: During normal operation of the subway, the internal threaded sleeve 4 can be stably fixed to the end of the handrail 1 by the snap-fit ​​between the limiting insert 10 and the limiting ring groove 5, and will not fall off accidentally. When the decorative top cover 3 needs to be removed for inspection and maintenance, the fastening screws on the two blocking collars 17 can be turned first to separate them from the handrail 1. At this time, the blocking collars 17 no longer play a role in blocking and limiting the decorative bottom cover 6. Then, one of the decorative bottom covers 6 is pulled to move it away from the corresponding decorative top cover 3, so that the four corresponding push plates 12 are gradually inserted into the corresponding push grooves 11. When the inclined edge of the push plate 12 contacts the inclined inner wall of the push groove 11, it will push against the four limiting blocks 10, causing the four corresponding limiting blocks 10 to move away from each other. Finally, the limiting blocks 10 are brought out from the corresponding limiting ring grooves 5. At this time, the corresponding internal thread sleeve 4 loses the grip of the foreign object. At the same time, the corresponding first tension spring 9 is in a stretched state, while the corresponding second tension spring 16 is in a compressed state. Then, screw on the corresponding decorative top cover 3 to unscrew the internal threaded sleeve 4 from the handrail 1, and the corresponding decorative bottom cover 6 can be released. The stretched first tension spring 9 and the compressed second tension spring 16 release their elasticity, bringing the decorative bottom cover 6 and the limiting insert 10 back to their original state. Then, remove the other decorative top cover 3 in the same way. During later installation, simply align the internal threaded sleeve 4 inside the decorative cover 3 with the end of the handrail 1 and screw it in. During the screwing process, when the second inclined surface of the end of the internal threaded sleeve 4 contacts the first inclined surface of the limiting insert 10, the two form a resisting effect, causing the four limiting inserts 10 to move away from each other, and the corresponding first tension spring 9 is stretched until the limiting ring groove 5 corresponds to the limiting insert 10. Then the stretched first tension spring 9 is pulled back, automatically pushing the four limiting inserts 10 into the limiting ring groove 5, thereby completing the locking effect. The other decorative cover 3 is also operated in the same way. After all operations are completed, slide the blocking collar 17 back to contact the decorative lower cover 6, and then tighten the fixing screw.

[0022] Compared with related technologies, the locking mechanism for the decorative cover at the end of the subway car handrail provided by this utility model has the following advantages: This utility model provides a locking mechanism for decorative covers at the ends of subway car handrails. By creating a limiting annular groove 5 on the outer wall of the internal threaded sleeve 4, and inserting limiting blocks 10, which are perpendicular to the internal threaded sleeve 4, into the limiting annular groove 5, the decorative upper cover 3 can be locked, preventing it from being rotated and thus avoiding loosening or falling off, improving safety performance. Furthermore, the decorative upper cover 3 and the decorative lower cover 6 can form a complete decorative effect, ensuring aesthetic appeal.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A subway car handrail rod end decorative cover locking mechanism, comprising a threaded sleeve set in the inner threaded sleeve of the handrail rod at both ends, characterized in that, Decorative top covers are fixedly installed at the ends of the two internally threaded sleeves that are far apart from each other. Two decorative bottom covers are slidably fitted on the handrail. The ends of the two decorative bottom covers that are far apart from each other extend into the two decorative top covers, and the outer ring walls of the two decorative bottom covers contact the inner ring walls of the two decorative top covers. Limiting annular grooves are formed on the outer ring walls of the two internally threaded sleeves. Four transverse support rods arranged in a circular array are provided in the two decorative bottom covers. The inward ends of the eight transverse support rods are fixedly connected to the handrail. Connecting strips are slidably installed on the eight transverse support rods. Four limiting blocks arranged in a circular array are provided in the two decorative bottom covers. The eight connecting strips are fixedly connected to the eight limiting blocks. The inward side of the eight limiting blocks extends into the corresponding limiting annular grooves. First tension springs are fitted on the eight transverse support rods. One end of the eight first tension springs is fixedly connected to the handrail, and the other end of the eight first tension springs is fixedly connected to the eight connecting strips.

2. The subway car handrail rod end cover locking mechanism according to claim 1, characterized in that, Both decorative lower covers have sliding holes. The handrail passes through the two sliding holes but does not contact the inner wall of the sliding holes. Both ends of the handrail have mounting countersunk holes. A column is fixedly installed in each of the two mounting countersunk holes. A cross connecting strip is slidably installed on each of the two columns. Eight ends of the cross connecting strip extend to the outside of the handrail and are fixedly connected to the inner wall of the sliding hole. The cross connecting strip is slidably connected to the handrail. Four push-pressing plates arranged in a circular array are fixedly installed on the inner wall of both decorative lower covers. The side of each of the eight push-pressing plates away from the decorative upper cover is designed with a bevel. Each of the eight limiting blocks has a push-sloping groove. The eight push-sloping grooves are adapted to the bevels of the eight push-pressing plates. A second tension spring is fitted on each of the two columns. The ends of the two second tension springs that are close to each other are fixedly connected to the inner wall of the two mounting countersunk holes that are close to each other. The ends of the two second tension springs that are far from each other are fixedly connected to the two cross connecting strips.

3. The subway car handhold rod end cover locking mechanism according to claim 2, characterized in that, Each of the two columns has a locking piece fixedly installed at one end that is far apart from the other, and the two cross connecting strips are in contact with the two locking pieces respectively.

4. The subway car handhold rod end cover locking mechanism according to claim 1, characterized in that, The handrail has eight tracks, and the eight ends of the two cross-shaped connecting strips all pass through the corresponding tracks and contact the inner wall of the corresponding tracks.

5. The subway car handhold rod end trim cover locking mechanism of claim 1, wherein, Two blocking rings are slidably fitted on the handrail. The ends of the two blocking rings that are far apart from each other abut against the sides of the two decorative lower covers that are close to each other. Each of the two blocking rings is threaded with a fastening screw, and the ends of the two fastening screws abut against the handrail.

6. The subway car handhold rod end trim cover locking mechanism of claim 1, wherein, Each of the eight limiting blocks has a first inclined surface on its inward-facing side, and each of the two internal threaded sleeves has a second inclined surface on its side that is close to each other. Both second inclined surfaces are adapted to the corresponding first inclined surfaces.

7. The subway car handhold rod end trim cover locking mechanism of claim 1, wherein, Two pull tabs are fixedly installed on the side of each of the two decorative lower covers that are close to each other.

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