A connecting structure between straight handrails

Abstract

The utility model provides a connecting structure between straight handrails, relates to passenger room handrail mechanical connection technical field of rail transit vehicle, including metal handrail and composite material handrail, the application need not to dismount whole handrail, greatly simplifies replacement procedure, only needs to dismount the fixed screw on composite material handrail, and can complete dismounting by pulling out outward, and can install by inserting and locking in new handrail alignment limit groove, effectively reduces operation step, significantly reduces the time of whole dismounting replacement.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection technology for handrails in passenger compartments of rail transit vehicles, and more specifically, to a connection structure between straight handrails. Background Technology

[0002] In the passenger interface of rail transit vehicles, handrails are crucial functional components, providing essential services such as grip, support, and comfort for drivers and passengers. Traditional handrails are mostly made of a single metal material. These metal handrails can be manufactured through a pultrusion process, and handrails made of the same metal material can be connected by welding.

[0003] With the development of materials technology, composite handrails have been increasingly used in rail transit vehicles due to their superior properties such as high strength, high modulus, and lightweight. In order to combine the excellent properties of both metals and composites and improve the aesthetics of the passenger compartment, the application of combined metal and composite handrails in rail transit vehicle passenger compartments is becoming more and more common.

[0004] Currently, passenger compartment handrails typically consist of metal handrails at both ends, with a composite material handrail (the main area for manual gripping) connecting in the middle. One end of each metal handrail is connected to the passenger compartment floor and the central ceiling, respectively. The specific installation process is as follows: First, fit the upper part of the upper metal handrail into the decorative cover. Then, align and install the upper metal handrail with the upper mounting bracket pre-installed on the central ceiling (specifically, use a transition piece to fill the gap between the tube seat and the connecting seat on the upper part of the upper mounting bracket, and then use screws to firmly fix the upper metal handrail). Then, proceed from the lower metal handrail... The lower part of the handrail is slipped into the decorative cover. After slipping it in, the lower part of the lower metal handrail is aligned with the lower mounting base pre-installed on the floor and installed (specifically, the lower part of the lower metal handrail is screwed into the lower mounting base). Existing composite handrails are generally screwed together with metal handrails through a threaded structure before being installed as a whole. However, if it is necessary to disassemble the composite handrail separately to change the decorative effect later, the entire handrail must be disassembled first to separate the metal handrail and the composite handrail. Therefore, the installation connection effect of the handrail in the guest room needs to be improved. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a connection structure between straight handrails.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A connection structure between straight handrails includes metal handrails and composite handrails, and also includes connectors. The two connectors are respectively bolted to the ends of the two metal handrails away from the carriage floor / center ceiling. The limiting groove is formed on the connector; The insert block and the limiting groove are matched, and when the insert block and the limiting groove are in contact, the composite handrail is exactly aligned with the metal handrail and the end faces of the two are tightly fitted. The insert block and the composite handrail are fixed by pre-embedded adhesive. The fastening bolt is set on the insert block, and the limiting groove has a threaded hole that is directly opposite to the fastening bolt and mates with the fastening bolt.

[0007] Furthermore, the insert block is symmetrically provided with countersunk holes, and countersunk screws are provided in the countersunk holes at intervals from the fastening bolts. The composite handrail is provided with mounting threaded holes directly opposite the countersunk screws.

[0008] Furthermore, a spring washer that contacts the insert block is provided on the threaded rod of the fastening bolt.

[0009] Furthermore, the shape of the insertion side of the insert block is the same as the contour of the limiting groove, and the shape of the insertion side of the insert block is one of rectangle, square or trapezoid.

[0010] Furthermore, a transverse auxiliary handrail is welded onto the connector of the metal handrail located above.

[0011] Furthermore, the composite handrails include various styles, all with the same length.

[0012] Furthermore, both the connector and the insert are made of 316 stainless steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) No need to disassemble the entire handrail, greatly simplifying the replacement process; This design only requires removing the fixing screws on the composite handrail and pulling it outward to complete the disassembly. The new handrail can be installed by aligning it with the limiting groove and locking it. The operation steps are effectively reduced, significantly reducing the time of disassembling and replacing the entire handrail (the operation time for replacing a single composite handrail is shortened to 5-10 minutes). (2) Flexible replacement of composite handrails to quickly optimize the decoration effect of the carriage; This design supports the replacement of composite handrails with different decoration effects without modifying the core fixed components. The visual style of the carriage can be switched according to the needs (such as composite handrails with different colors and textures) to improve the aesthetics of the carriage and meet the diverse needs of operators for upgrading the passenger cabin environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 A schematic diagram for creating a threaded hole; Figure 3 Schematic diagram for drilling a countersunk hole; Figure label: 1. Metal handrail; 2. Composite handrail; 3. Connector; 4. Limiting groove; 5. Insert block; 6. Fastening bolt; 7. Threaded hole; 8. Spring washer; 9. Countersunk hole; 10. Countersunk screw; 11. Mounting threaded hole; 12. Horizontal auxiliary handrail. Detailed Implementation

[0015] The technical solutions of the present utility model 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 utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: like Figure 1 and Figure 2 As shown, a connection structure between straight handrails includes a metal handrail 1 and a composite handrail 2 (the composite handrail 2 includes various styles and all have the same length), and also includes a connector 3. The two connectors 3 are respectively bolted to the ends of the two metal handrails 1 that are away from the floor / top of the carriage. The limiting groove 4 is formed on the connector 3; The insert 5 and the limiting groove 4 are matched, and when the insert 5 and the limiting groove 4 are in contact, the composite handrail 2 is exactly aligned with the metal handrail 1 and the end faces of the two are tightly attached. The insert 5 and the composite handrail 2 are fixed by pre-embedded adhesive. The fastening bolt 6 is set on the insert block 5, and the limiting groove 4 has a threaded hole 7 that is directly opposite to and cooperates with the fastening bolt 6 (more precisely, the connector 3 and the insert block 5 are both made of 316 stainless steel, thus avoiding rust while having high strength).

[0016] To further improve the connection strength between the composite handrail 2 and the insert block 5 based on the pre-embedded adhesive, the above-described embodiment is further optimized, such as... Figure 3 As shown, countersunk holes 9 are symmetrically opened on the insert block 5, and countersunk screws 10 are arranged in the countersunk holes 9 at intervals from the fastening bolts 6. The composite handrail 2 is provided with mounting threaded holes 11 facing the countersunk screws 10.

[0017] To reduce the probability of the fastening bolt 6 loosening during the use of the handrail, further optimizations to the above embodiment are made, such as... Figure 3 As shown, a spring washer 8 is provided on the screw of the fastening bolt 6, which contacts the insert block 5.

[0018] To prevent the insertion block 5 from rotating during insertion into the limiting groove 4 and affecting subsequent fastening, the above embodiment is further optimized by having the insertion side shape of the insertion block 5 have the same outline as the limiting groove 4, and the insertion side shape of the insertion block 5 is one of a rectangle, a square, or a trapezoid.

[0019] To further improve the grabbing area within the passenger compartment of rail transit vehicles, the above-described embodiments can be further optimized, such as... Figure 1 A horizontal auxiliary handrail 12 is welded to the connector 3 of the metal handrail 1 located at the top.

[0020] The working process of this utility model is as follows: When it is necessary to disassemble the existing composite handrail 2 and replace it with a style with other decorative effects, the operation procedure is as follows: First, use an electric drill to unscrew the fixing screws, so that the screws are separated from the threaded holes 7; then hold the composite handrail 2 and pull it outward to complete the disassembly. When installing the new handrail, the two inserts 5 of the new handrail need to be aligned with the limiting grooves 4 on the connector 3 and inserted. During the insertion process, they must be kept relatively fixed and not rotated; until the new handrail is visually aligned with the metal handrail 1 and cannot be pushed any further, use the fixing screws to lock the inserts 5 and the limiting grooves 4 to ensure a firm connection.

[0021] The composite handrail 2 is designed to be longer, primarily for two reasons: firstly, to cover as much of the gripping area as possible for standing passengers, improving ease of use; and secondly, to enhance the visual sense of extension and strengthen the decorative effect. Following the above method, all composite handrails 2 in the carriage can be replaced sequentially, allowing for partial disassembly and assembly without disassembling the entire handrail. This approach not only allows for flexible creation of different decorative styles within the carriage and enhances aesthetics but also optimizes the disassembly and replacement process of the composite handrail 2, improving operational efficiency.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A connection structure between straight handrails, comprising a metal handrail (1) and a composite handrail (2), characterized in that, It also includes connectors (3). The two connectors (3) are bolted to the ends of the two metal handrails (1) away from the floor / top of the carriage; The limiting groove (4) is formed on the connector (3); The insert (5) and the limiting groove (4) cooperate with each other, and when the insert (5) and the limiting groove (4) abut against each other, the composite handrail (2) is aligned with the metal handrail (1) and the two end faces are tightly attached. The insert (5) and the composite handrail (2) are fixed by pre-embedded adhesive. The fastening bolt (6) is set on the insert (5), and the limiting groove (4) has a threaded hole (7) that is directly opposite to the fastening bolt (6) and matches the fastening bolt (6).

2. The connection structure between straight handrails according to claim 1, characterized in that, The insert (5) is symmetrically provided with countersunk holes (9), and countersunk screws (10) are provided in the countersunk holes (9) at intervals from the fastening bolts (6). The composite handrail (2) is provided with mounting threaded holes (11) facing the countersunk screws (10).

3. The connection structure between straight handrails according to claim 1, characterized in that, The fastening bolt (6) has a spring washer (8) that contacts the insert block (5) on its thread.

4. The connection structure between straight handrails according to claim 1, characterized in that, The shape of the insertion block (5) on the entry side is the same as the outline of the limiting groove (4), and the shape of the insertion block (5) on the entry side is one of rectangle, square or trapezoid.

5. The connection structure between straight handrails according to claim 1, characterized in that, A transverse auxiliary handrail (12) is welded to the connector (3) of the metal handrail (1) located above.

6. The connection structure between straight handrails according to claim 1, characterized in that, The composite handrail (2) includes various styles and all have the same length.

7. The connection structure between straight handrails according to claim 1, characterized in that, Both the connector (3) and the insert (5) are made of 316 stainless steel.

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