Rocking seat for train

Abstract

The utility model provides a rocking seat for a train, which comprises a rocking seat, supporting heads are integrally arranged at two ends of the rocking seat, a semi-cylindrical block is fixed on the lower side of each supporting head, a positioning column is arranged on one side of each semi-cylindrical block, and the positioning columns are inserted into positioning holes of the supporting heads in a penetrating manner and are fixed in a welding manner; first inserting holes are formed in the positions, close to the four corners, of the upper surface of the shaking base, a second inserting hole is formed in the center of the shaking base, a first receding groove and a second receding groove are formed in upper end openings of the first inserting hole and the second inserting hole respectively, a first connecting column is installed in the first inserting hole, a second connecting column is installed in the second inserting hole, and a first plug is arranged at the lower end of the first connecting column. A first plug is arranged at the lower end of the first connecting column, a first check ring is arranged at the position close to the first plug, a second plug is arranged at the lower end of the second connecting column, a second check ring is arranged at the position close to the second plug, and the first check ring and the second check ring are partially embedded into the first receding groove and the second receding groove respectively and fixed in a welding mode.

Description

Technical Field

[0001] This utility model belongs to the technical field of bogie accessories, specifically relating to a rocker seat for trains. Background Technology

[0002] The comfort and safety of train seats have a significant impact on passenger experience. Existing train seats typically employ fixed or adjustable structures to meet the needs of different passengers. However, in practical use, traditional seats have certain limitations, such as low installation precision, insufficiently secure fixing, and tendency to loosen after prolonged use, affecting seat lifespan and riding comfort. Therefore, to improve seat stability and reliability, rocking seat structures are widely used in train seating systems to provide better support and a more comfortable riding experience.

[0003] Existing train rocker seats are typically fixed using bolt connections or simple welding during installation. However, this method has several drawbacks: First, bolt connections are prone to loosening under long-term vibration, reducing seat stability. Second, ordinary welding methods struggle to guarantee positioning accuracy, potentially leading to improper installation of seat components and affecting overall structural stability. Furthermore, some connection structures, due to flawed design, are susceptible to deformation or detachment under external forces, reducing seat safety. Therefore, there is still room for improvement in the installation and fixing of existing train rocker seats. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a rocking seat for trains. It can ensure the stability and reliability of each component of the rocking seat by optimizing the connection structure and welding method, so as to adapt to the long-term vibration environment during train operation and improve the service life and riding comfort of the seat.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rocking seat for trains includes a rocking seat, both ends of which are integrally provided with protruding support heads, and a first connecting column is fixed to the upper surface of the rocking seat near the four corners, and a second connecting column is fixed to the center of the upper surface of the rocking seat.

[0007] Semi-cylindrical blocks are provided on the lower side of the left and right support heads. Two positioning posts are fixed on the side of the semi-cylindrical blocks that connect with the support heads. The upper ends of the positioning posts are inserted into the support heads, and the positioning posts are welded to the support heads.

[0008] Furthermore, positioning holes for inserting positioning columns are provided on both the left and right support heads, and a groove is provided at the upper end of the positioning hole.

[0009] Furthermore, the upper surface of the rocker seat is provided with a first insertion hole near each of the four corners, and a first clearance groove is provided at the upper end of the first insertion hole.

[0010] Furthermore, a first plug is fixed to the lower end of the first connecting post, and a first retaining ring is fixed to the first connecting post near the first plug. The diameter and depth of the first clearance groove are both greater than the diameter and thickness of the first retaining ring.

[0011] Furthermore, a second insertion hole is provided at the center of the upper surface of the rocking seat, and a second clearance groove is provided at the upper port of the second insertion hole.

[0012] Furthermore, a second plug is fixed to the lower end of the second connecting post, and a second retaining ring is fixed to the second connecting post near the second plug. The diameter and depth of the second clearance groove are both greater than the diameter and thickness of the second retaining ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model provides a rocker seat for trains. By optimizing the structural design and welding fixing method, the installation accuracy and connection stability of the rocker seat are improved, and the problems of loosening, weak connection and insufficient installation accuracy of existing rocker seats during long-term use are solved.

[0015] This invention employs a structural design with integrated support heads at both ends of the rocking seat. A semi-cylindrical block is fixed to the lower side of the support head, and a positioning post is inserted into the support head. The positioning post is then firmly connected to the support head using welding. This structure ensures more precise alignment between the semi-cylindrical block and the support head. A groove on the support head provides adequate space for welding, making the weld point more stable, improving connection strength, and solving the problem of loosening common with traditional bolt connections. Furthermore, both the semi-cylindrical block and the positioning post are made of high-strength materials, enabling the entire rocking seat to withstand significant impacts and vibrations during train operation, thus improving the overall durability and safety of the structure.

[0016] This invention features first insertion holes near the four corners of the upper surface of the rocking seat, and a second insertion hole at the center, for mounting the first and second connecting posts, respectively. A first clearance groove and a second clearance groove are respectively provided at the upper ends of the first and second insertion holes, allowing the first and second retaining rings to partially embed within the clearance grooves, providing a good limiting and fixing effect and ensuring sufficient space during welding. This design avoids the problem of uneven welding strength caused by insufficient welding space in traditional connection structures, while ensuring the stability of the connecting posts after installation, and improving the durability and vibration resistance of the overall seat structure.

[0017] This invention features a first plug and a second plug at the lower ends of the first and second connecting columns, respectively, with a first retaining ring and a second retaining ring fixed near the plugs. This allows the connecting columns to be inserted more precisely into the corresponding holes and then welded to the rocker seat. By optimizing the welding position and connection method, the first and second connecting columns are more stable when bearing the seat load, avoiding the shaking or displacement caused by loose connection structures in traditional seats, thus improving the comfort and safety of train seats.

[0018] The materials used in this invention are all high-strength alloy steel and wear- and corrosion-resistant materials, giving the entire rocker seat stronger load-bearing capacity and fatigue resistance, enabling it to adapt to the complex vibration environment during long-term train operation. By optimizing the installation structure, the seat installation is more precise and secure, improving installation efficiency, reducing maintenance costs, and extending the seat's service life, thus meeting the high requirements for seat stability, safety, and durability during train operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the semi-cylindrical block of this utility model;

[0021] Figure 3 This is a schematic diagram of the rocking base of this utility model;

[0022] Figure 4 This is a schematic diagram of the first connecting post of this utility model;

[0023] Figure 5 This is a schematic diagram of the second connecting column of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Shaking base; 11. Positioning hole; 12. Recessed groove; 13. First insertion hole; 131. First clearance groove; 14. Second insertion hole; 141. Second clearance groove; 2. First connecting post; 21. First retaining ring; 22. First plug; 3. Second connecting post; 31. Second retaining ring; 32. Second plug; 4. Support head; 5. Semi-cylindrical block; 51. Positioning post. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. Example

[0027] like Figure 1 and Figure 2 As shown, a rocking seat for trains includes a rocking seat 1. Both ends of the rocking seat 1 are integrally provided with protruding support heads 4. The outer surface of the support heads 4 is made of Q235 carbon structural steel to improve its compressive strength and wear resistance, ensuring it can withstand large impact loads and long-term vibrations during train operation. First connecting columns 2 are fixed to the upper surface of the rocking seat 1 near the four corners. The first connecting columns 2 are made of high-strength alloy steel to improve their shear resistance and connection stability, preventing loosening or deformation during long-term use. A second connecting column 3 is fixed to the center of the upper surface of the rocking seat 1. The second connecting column 3 is also made of high-strength alloy steel to improve the overall structural load-bearing capacity and service life.

[0028] Semi-cylindrical blocks 5 are provided on the lower side of the left and right support heads 4. The semi-cylindrical blocks 5 are made of No. 45 steel to improve their hardness and wear resistance, ensuring that they will not be damaged by friction or impact during long-term operation. Two positioning posts 51 are fixed on the side where the semi-cylindrical blocks 5 meet the support heads 4. The positioning posts 51 are made of stainless steel with a diameter of 8mm to improve their corrosion resistance and rigidity, ensuring that they will not deform or loosen during train operation. The upper end of the positioning posts 51 is inserted into the support head 4 and fixed by argon arc welding to improve the welding strength and ensure that the semi-cylindrical blocks 5 can be firmly fixed on the support head 4, avoiding displacement or loosening due to train vibration.

[0029] like Figure 3 As shown, positioning holes 11 are provided on both the left and right support heads 4 for the positioning pins 51 to be inserted. The diameter of the positioning holes 11 is controlled between 8.2mm and 8.5mm to ensure that the positioning pins 51 can be inserted smoothly and provide a precise positioning effect. A countersunk groove 12 is provided at the upper end of the positioning hole 11. The countersunk groove 12 has a diameter of 12mm and a depth of 2mm. The function of the countersunk groove 12 is to provide a reasonable welding space for subsequent welding operations, so that the welding rod can penetrate into the connection gap between the positioning pins 51 and the support head 4, thereby achieving a more stable welding fixation and improving the overall strength of the connection.

[0030] like Figure 3As shown, the upper surface of the rocker seat 1 is provided with a first insertion hole 13 near the four corners. The diameter of the first insertion hole 13 is set to 12mm to ensure that the first connecting post 2 can be stably inserted and provide firm support. A first clearance groove 131 is provided at the upper end of the first insertion hole 13. The diameter of the first clearance groove 131 is 18mm and the depth is 4mm. The function of the first clearance groove 131 is to provide space for the first retaining ring 21 so that the first retaining ring 21 can be embedded therein, and to provide a reasonable gap for subsequent welding, so as to ensure that the first connecting post 2 can be firmly fixed and avoid loosening or displacement of the connection due to train running vibration.

[0031] like Figure 4 As shown, a first plug 22 is fixed to the lower end of the first connecting post 2. The first plug 22 is made of 40Cr alloy steel to improve its bending strength and wear resistance, so that it can withstand the mechanical stress generated by the long-term operation of the train. A first retaining ring 21 is fixed to the first connecting post 2 near the first plug 22. The diameter of the first retaining ring 21 is 16mm and the thickness is 3mm. The diameter and depth of the first clearance groove 131 are both greater than the diameter and thickness of the first retaining ring 21 to ensure that the first retaining ring 21 can be smoothly inserted. The clearance groove structure can provide reasonable space for welding operations, enhance the fixing strength of the first connecting post 2, and improve the overall stability of the rocker seat 1.

[0032] like Figure 3 As shown, a second insertion hole 14 is provided at the center of the upper surface of the rocker seat 1. The diameter of the second insertion hole 14 is set to 14mm to ensure that the second connecting post 3 can be smoothly inserted and provide reliable support. A second clearance groove 141 is provided at the upper end of the second insertion hole 14. The diameter of the second clearance groove 141 is 20mm and the depth is 4mm. The design of the second clearance groove 141 can provide reasonable accommodation space for the second retaining ring 31 and ensure the stability of subsequent welding.

[0033] like Figure 5 As shown, a second plug 32 is fixed to the lower end of the second connecting post 3. The second plug 32 is made of 40Cr alloy steel to improve its wear resistance and compressive strength, ensuring that it can withstand the mechanical stress generated during train operation for a long time. A second retaining ring 31 is fixed to the second connecting post 3 near the second plug 32. The diameter of the second retaining ring 31 is 18mm and the thickness is 3mm. The diameter and depth of the second clearance groove 141 are both greater than the diameter and thickness of the second retaining ring 31, to ensure that the second retaining ring 31 can be embedded therein and to provide reasonable space for welding operations. This allows the second connecting post 3 to be more firmly fixed to the rocker seat 1, improving the overall structural strength and stability of the rocker seat 1, thereby adapting to the complex working environment during train operation and improving the safety and comfort of the seat.

[0034] Example 2: Welding and fixing method based on precise positioning of semi-cylindrical block and support head

[0035] This embodiment provides a welding and fixing method based on the precise positioning of the semi-cylindrical block and the support head, so as to improve the overall connection accuracy and stability of the rocking seat and ensure that the seat can withstand long-term vibration without loosening during train operation.

[0036] In the specific implementation process, the semi-cylindrical block is made of No. 45 steel, which has good impact resistance and wear resistance. The diameter of the semi-cylindrical block is set to 50mm and the length to 80mm to ensure that a stable support structure can be formed on the underside of the support head. Two positioning posts with a diameter of 8mm are provided on one side of the semi-cylindrical block. The positioning posts are made of 304 stainless steel and are inserted into the positioning holes on the support head. The diameter of the positioning holes is set to 8.3mm to ensure that there is an appropriate fitting clearance after insertion. Before welding, the fitting angle between the positioning posts and the support head is accurately measured by a laser positioning device to ensure that no positional displacement occurs during welding. Then, E308-16 stainless steel welding rods are filled in the sink area, and TIG (tungsten inert gas welding) welding method is used to ensure that the weld joint has good ductility and fatigue resistance. After welding, ultrasonic testing is performed on the weld area to ensure that the weld quality meets the requirements of GB / T3323-2005 "Radiographic Inspection of Metal Fusion Welded Joints" standard.

[0037] Comparative Case: Traditional rocker seats typically use bolt connections, with the semi-cylindrical block fixed to the support head using M8 bolts. While the installation process is relatively simple, the bolt connections are prone to loosening due to the significant vibrations during long-term train operation. This can lead to misalignment or detachment of the rocker seat when subjected to impact forces. Furthermore, the relatively large gaps in the bolt connections gradually widen under high-frequency vibration, ultimately affecting the seat's stability. This embodiment uses a welding method to create a rigid, integrated structure between the semi-cylindrical block and the support head, effectively improving seismic resistance and durability, and preventing loosening caused by long-term vibration.

[0038] Example 3: Limiting Embedded Connection Method Based on First and Second Sockets

[0039] This embodiment provides a limiting embedded connection method based on the first and second sockets. By reasonably designing the size of the clearance groove, the installation stability of the connecting column is improved and the shock resistance of the seat is enhanced.

[0040] In the specific implementation process, the diameter of the first insertion hole is set to 12.2mm, and the diameter of the second insertion hole is set to 14.2mm to ensure a 0.2mm fitting gap after the first and second connecting posts are inserted. Both the first and second connecting posts are made of 40Cr alloy steel and have undergone high-frequency quenching treatment to achieve a surface hardness of HRC50 or higher, thereby improving shear resistance. The diameter of the first clearance groove is set to 18mm, and the depth is 4mm, while the diameter of the second clearance groove is set to 20mm, and the depth is 4mm. The diameter and depth of the clearance grooves are both greater than the diameter and thickness of the retaining ring, allowing the retaining ring to be partially embedded and providing space for subsequent welding. Before welding, micro-arc plasma cleaning technology is used to remove the oxide layer on the surface of the connecting posts to ensure welding quality. During welding, E7018 low-hydrogen welding rods are selected to improve the fatigue resistance of the welded joint. After welding, stress annealing treatment is performed to eliminate residual welding stress and improve the overall service life of the rocker seat.

[0041] Comparative Case: Traditional rocker bases typically use a direct insertion and spot welding method for the connecting column installation. This method is prone to incomplete fixation due to improper insertion depth control during installation, potentially leading to shaking or loosening during subsequent use. Furthermore, the small welding area of ​​spot welding makes it susceptible to weld cracking under long-term loads. This embodiment, by adding a clearance groove, allows the retaining ring to be partially embedded inside the insertion hole, and employs full-circumference welding, improving the overall fixing strength of the connecting column. This effectively solves the problem of connecting column loosening and enhances the stability and durability of the rocker base.

[0042] Example 4: Precision positioning and impact-resistant structure based on plug and retaining ring

[0043] This embodiment provides a precision positioning and impact-resistant structure based on a plug and a retaining ring. By optimizing the structural dimensions of the plug and the retaining ring, the stability of the rocker seat under impact is improved.

[0044] In the specific implementation process, the diameters of the first plug and the second plug are set to 11.8mm and 13.8mm respectively to ensure a 0.2mm fitting clearance within the socket. The plugs are made of 40CrNiMo alloy steel to improve their impact resistance. The first and second retaining rings are made of 16Mn low-alloy high-strength steel to ensure they do not deform under long-term stress. The thickness of the retaining ring is set to 3mm. The diameter and depth of the first and second clearance grooves are 2mm larger than the retaining ring to ensure the retaining ring can be smoothly embedded and to provide reasonable space during welding. Before welding, CO2 gas shielded welding is used for initial fixing, followed by multi-pass welding to improve the overall welding strength. Magnetic particle testing is then performed to ensure the weld quality meets the GB / T11345-2013 standard for non-destructive testing of welds.

[0045] Comparative Case: In the traditional installation of the connecting column of a rocker seat, the plug is usually directly inserted into the socket and welded on one side. Although this method is simple to install, when subjected to impact, the connecting column is prone to axial displacement because the retaining ring is not embedded inside the socket, leading to fatigue cracking of the weld under long-term stress. In addition, the gap between the plug and the socket is relatively large, which can easily lead to loosening of the connection due to wear during long-term use. This embodiment uses high-strength materials to make the plug and retaining ring and optimizes their fitting dimensions, making the connecting column more stable after being inserted into the socket. At the same time, the multi-welding process improves the fatigue resistance of the weld, thereby improving the service life and impact resistance of the rocker seat.

[0046] Example 5: Overall Durability Optimization Design Based on High-Strength Alloy Materials

[0047] This embodiment provides an overall durability optimization design based on high-strength alloy materials, which improves the fatigue resistance and service life of the rocker seat by rationally selecting materials.

[0048] In the specific implementation process, the main body of the rocker seat is made of Q235B carbon structural steel and is treated with an epoxy resin anti-corrosion coating to improve its corrosion resistance; the semi-cylindrical block is made of 45 steel and is carburized and quenched to achieve a surface hardness of HRC60 or higher, improving wear resistance; the first and second connecting columns are both made of 40Cr alloy steel and are nitrided to improve their wear resistance and fatigue resistance by more than 40%; the welded parts are all made of E5015 low-hydrogen welding rods to improve crack resistance and welding strength, and ultrasonic impact treatment is used to eliminate residual welding stress, ensuring that the rocker seat still has high stability under long-term vibration environment.

[0049] Comparative Case: Traditional rocker seats are usually made of ordinary carbon steel, which is cheaper, but is prone to fatigue damage under long-term vibration, resulting in a decrease in structural strength. This embodiment improves the overall durability and impact resistance by using high-strength alloy materials and surface treating key components, thereby extending the service life of the rocker seat.

[0050] The working principle of this utility model is as follows: When assembling the rocking seat 1, the semi-cylindrical block 5 is inserted into the inner side of the positioning hole 11 through the positioning post 51, and then welding is carried out through the gap between the groove 12 and the positioning post 51 using welding rod, thereby completing the assembly and fixing of the semi-cylindrical block 5 on the rocking seat 1, which satisfies the requirement of more precise and reliable installation and fixing of the semi-cylindrical block 5 on the rocking seat 1.

[0051] When installing the first connecting post 2 and the second connecting post 3, the first connecting post 2 and the second connecting post 3 are respectively inserted into the first socket 13 and the second socket 14. Then, welding is performed using welding rods through the gaps between the first retaining ring 21 and the first relief groove 131 and between the second retaining ring 31 and the second relief groove 141, thereby completing the secure installation of the first connecting post 2 and the second connecting post 3 on the rocker seat 1.

[0052] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A rocking seat for a train, comprising a rocking seat (1), characterized in that: Both ends of the rocking seat (1) are integrally provided with protruding support heads (4), and the upper surface of the rocking seat (1) is fixed with first connecting columns (2) near the four corners, and the center of the upper surface of the rocking seat (1) is fixed with a second connecting column (3). A semi-cylindrical block (5) is provided on the lower side of the support head (4) on both the left and right sides. Two positioning posts (51) are fixed on the side of the semi-cylindrical block (5) that is connected to the support head (4). The upper end of the positioning post (51) is inserted into the support head (4), and the positioning post (51) is welded and fixed to the support head (4).

2. A rocking seat for a train according to claim 1, characterized in that: The support heads (4) on both the left and right sides are provided with positioning holes (11) for inserting positioning pins (51), and a groove (12) is provided at the upper end of the positioning holes (11).

3. A rocking seat for a train according to claim 1, characterized in that: The upper surface of the rocking seat (1) is provided with a first insertion hole (13) near the four corners, and a first clearance groove (131) is provided at the upper port of the first insertion hole (13).

4. A rocking seat for a train according to claim 3, characterized in that: The lower end of the first connecting post (2) is fixed with a first plug (22), and a first retaining ring (21) is fixed on the first connecting post (2) near the first plug (22). The diameter and depth of the first clearance groove (131) are both greater than the diameter and thickness of the first retaining ring (21).

5. A rocking seat for a train according to claim 1, characterized in that: The upper surface of the rocking seat (1) is provided with a second insertion hole (14) at the center position, and a second clearance groove (141) is provided at the upper port of the second insertion hole (14).

6. A rocking seat for a train according to claim 5, characterized in that: The lower end of the second connecting post (3) is fixed with a second plug (32), and a second retaining ring (31) is fixed on the second connecting post (3) near the second plug (32). The diameter and depth of the second clearance groove (141) are both greater than the diameter and thickness of the second retaining ring (31).

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