A seat framework, a processing technology of the seat framework and a railway vehicle

Abstract

The application provides a seat framework, a processing technology of the seat framework and a railway vehicle. The seat framework comprises a backrest framework body made of a composite material, an angle adjusting arm and a reinforcing rib. The angle adjusting arm comprises a main body and a connecting part. The connecting part is used for connecting with a handrail or an angle adjusting mechanism. The main body of the angle adjusting arm and the reinforcing rib are embedded in the backrest framework body. The reinforcing rib comprises an integral horizontal part and an integral inclined part. The main body of the angle adjusting arm is located at a lower end of the backrest framework body. The horizontal part is located above the main body and connected with the main body. One end of the inclined part of the angle adjusting arm extends to an outer side of a top of the backrest framework body. The other end of the inclined part is connected with an inner end of the horizontal part. The connecting interface can be reduced, the weight can be reduced, and the required curved surface can be easily processed.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, specifically to a seat frame, a manufacturing process for the seat frame, and a rail vehicle. Background Technology

[0002] The frames of the passenger seats in high-speed trains are basically the same, generally consisting of "aluminum alloy backrest + aluminum alloy rotating frame + high-strength steel base frame". The backrest and rotating frame are riveted frame structures, while the base frame is a welded frame structure.

[0003] In the aforementioned structure, the backrest has numerous rivet and screw interfaces and related connecting parts, resulting in a relatively large weight. Furthermore, machining the backrest into a curved metal surface requires complex processing techniques, so backrests are usually flat, offering limited comfort. Summary of the Invention

[0004] This application provides a seat frame, which is a one-piece backrest frame body made of composite material, which can reduce connection interfaces, reduce weight, and is easy to process into the required curved surface.

[0005] The seat frame provided in this application includes a backrest frame, the backrest frame includes an integral backrest frame body made of composite material, the seat frame also includes an adjustment arm and a reinforcing rib, the adjustment arm includes a main body and a connecting part, the connecting part is used to connect with an armrest or an adjustment mechanism, and the main body of the adjustment arm and the reinforcing rib are both embedded in the backrest frame body.

[0006] The reinforcing rib includes an integral horizontal part and a diagonal part. The main body of the angle-adjusting arm is located at the lower end of the backrest frame body. The horizontal part is located above the main body and connected to the main body. One end of the diagonal part of the angle-adjusting arm extends to the outer side of the top of the backrest frame body, and the other end of the diagonal part is connected to the inner end of the horizontal part.

[0007] In one specific embodiment, the reinforcing rib includes a plate portion, and the plate portion has first flanges on both sides extending toward the front or rear side of the backrest frame body, the first flanges being supported in the backrest frame body along the extending direction.

[0008] In one specific embodiment, the edge of the first flange has an extended second flange, the second flange abutting against the backrest frame body, and the inner and outer sides of the main body of the angle adjustment arm have upwardly extending extensions, the extensions abutting against the first flange, and at least a portion of the extensions being located in the space between the first flange and the second flange.

[0009] In one specific embodiment, both the horizontal section and the main body of the angle-adjusting arm extend from the outside to the inside of the backrest frame body.

[0010] In one specific embodiment, the outer and inner sides of the backrest frame body are provided with forward-protruding protrusions, the protrusions extending from the top to the bottom of the backrest frame body, and the thickness of the portion of the protrusion at the upper end of the backrest frame body is greater than the thickness of the other portions.

[0011] In one specific embodiment, the seat frame further includes a rotating frame, which includes an integral rotating frame body made of composite material. The rotating frame body includes a seat plate and side portions located on the left and right sides of the seat plate. The side portions extend upward and are used to embed into and be fixed to the corresponding armrests.

[0012] In one embodiment, the center of the seat plate protrudes upward to form a protrusion, and the bottom surface of the protrusion is recessed upward to form a cavity, the cavity being used to accommodate at least a portion of the rotating mechanism connecting the rotating frame.

[0013] In one specific embodiment, the upper surface of the protrusion is further provided with a boss for corresponding handrail to be attached and fixed.

[0014] In one specific embodiment, the frame body of the rotating frame is provided with a clearance hole or clearance groove to avoid the connection part between the angle adjustment arm and the handrail.

[0015] In one specific embodiment, the bottom of the seat plate is provided with a support protrusion for supporting the base frame of the seat frame.

[0016] In one specific embodiment, the seat frame further includes a base frame, which includes an integral base frame body made of composite material. The base frame body includes a horizontally extending main body and a bent portion that bends downward from the inner end of the main body. The outer end of the main body is connected to the side wall of the rail vehicle, and the lower end of the bent portion is connected to the floor of the rail vehicle.

[0017] In one specific embodiment, the base frame body is provided with a support protrusion for supporting the rotation mechanism of the seat.

[0018] In one specific embodiment, the seat frame body has an arc-shaped vertical cross-section along the front-to-back direction; and / or, the bottom surface of the base frame body is provided with an upwardly recessed portion.

[0019] This application also provides a processing method for a seat frame, used to process the seat frame described in any of the above claims, characterized in that it includes processing the backrest frame, with the following steps:

[0020] The reinforcing ribs and the angle-adjusting support arms are prepared, and the front backrest component and the backrest component of the backrest frame body are prepared by means of composite materials.

[0021] Position the reinforcing rib and the angle-adjusting arm to the front part of the backrest or the back part of the backrest;

[0022] The front backrest component and the rear backrest component are assembled and placed in an autoclave for curing and molding.

[0023] This application also provides a rail vehicle, including a car body, wherein a seat frame as described in any of the above claims is disposed within the car body.

[0024] The seat frame provided in this application is a one-piece backrest frame made of composite materials, which reduces connection interfaces and weight. Reinforcing ribs and adjustable arms are embedded within the backrest frame, and these ribs and arms can be made of metal to meet strength requirements. Furthermore, the horizontal and diagonal portions of the reinforcing ribs can be used to specifically reinforce desired areas while saving material. Additionally, it is understood that because it is made of composite materials, the backrest frame is easier to machine into the required curved surfaces to improve seating comfort. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the seat frame 100 in an embodiment of this application;

[0026] Figure 2 for Figure 1 The main view;

[0027] Figure 3 for Figure 2 Perspective view;

[0028] Figure 4 for Figure 1 A schematic diagram showing the connection between the adjustable arm and the rotating frame of the backrest frame;

[0029] Figure 5 for Figure 3 Sectional view along axis AA;

[0030] Figure 6 for Figure 3 BB-direction sectional view;

[0031] Figure 7 for Figure 3 CC-direction sectional view;

[0032] Figure 8 for Figure 1 A schematic diagram of the separate processing of the backrest frame;

[0033] Figure 9 for Figure 1Schematic diagram of the connection between the transfer frame frame and the base frame frame;

[0034] Figure 10 for Figure 9 Schematic diagram of the transfer frame frame;

[0035] Figure 11 for Figure 10 A schematic diagram showing the side of the transfer frame frame inserted into the handrail;

[0036] Figure 12 for Figure 9 A schematic diagram of a cross-sectional view along the left and right sides;

[0037] Figure 13 for Figure 9 Front view of the fixed connection between the chassis frame and the vehicle body;

[0038] Figure 14 for Figure 1 Schematic diagram of the split-piece machining structure of the transfer frame;

[0039] Figure 15 for Figure 1 A schematic diagram of the split-processing of the mid-base frame.

[0040] The annotations in the figure are explained as follows:

[0041] 100 - Seat frame;

[0042] 1-Backrest frame; 11-Backrest frame body; 11a-Front backrest component; 11a1-First overlapping edge; 11b-Rear backrest component; 11b1-Second overlapping edge; 111-Handle; 111-Protrusion; 1121-Upper end of protrusion; 12-Angle adjustment arm; 121-First connecting part; 122-Second connecting part; 123-Main body; 124-Extension; 13-Reinforcing rib; 131-Horizontal part; 132-Slanted part; 14-Adhesive layer;

[0043] 2-Transformer frame; 2a-Upper section of the transformer frame; 2a1-Third overlapping edge; 2b-Lower section of the transformer frame; 2b1-Fourth overlapping edge; 21-Seat plate; 22-Side part; 23-Protrusion; 231-Boss; 232-Allowing groove;

[0044] 3-Base frame skeleton; 3a-Upper base frame component; 3a1-Fifth lap joint; 3b-Lower base frame component; 3b1-Sixth lap joint; 31-Main body; 32-Bending part;

[0045] 4-Handrail;

[0046] 5-Rotary bearing. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1-2 As shown, Figure 1 This is a schematic diagram of the seat frame 100 in an embodiment of this application; Figure 2 for Figure 1 The main view.

[0049] The seat frame 100 in this embodiment is a seat frame 100 for rail vehicles, specifically a seat frame 100 for EMU trains. This seat frame 100 includes a base frame 3, a rotating frame 2, and at least one backrest frame 1. The bottom of the backrest frame 1 is connected to the rotating frame 2, and the rotating frame 2 and the base frame 3 are rotatably connected. In this way, the rotating frame 2 can drive the backrest frame 1 to change the orientation of the seat. Figure 1 The seat frame 100 shown includes two backrest frames 1, which is a two-seater structure. It can also be a three-seater structure with three backrest frames 1, etc. There is no limit to the specific number.

[0050] Please combine Figure 1 , 2 And continue to refer to Figure 3 , 4 , Figure 3 for Figure 2 A perspective view to illustrate the reinforcing ribs 13 inside the backrest frame 1; Figure 4 for Figure 1 A schematic diagram showing the connection between the angle adjustment arm 12 of the backrest frame 1 and the rotating frame 2.

[0051] The backrest frame 1 includes an integral backrest frame body 11 made of composite material. In this embodiment, the composite material can be carbon fiber composite material or other composite materials with the required strength. The backrest frame body 11 serves as the main structure for passenger support. The backrest frame 1 of the seat frame 100 also includes an adjustment arm 12 and reinforcing ribs 13. Handles 111 are provided at both ends of the top of the backrest frame 1 for easy rotation. The backrest frame 1 is connected to the rotating frame 2 via the adjustment arm 12, allowing the backrest frame 1 to adjust its tilt angle relative to the rotating frame 2, so that the passenger can adjust to a suitable seating angle.

[0052] The angle-adjusting arm 12 includes a main body 123 and a connecting part. The main body 123 is connected to the backrest frame body 11, and the connecting part is used to connect to the armrest 4 or the angle-adjusting mechanism (not shown in the figure). Figure 4As shown, the side of the main body 123 is provided with a first connecting part 121 that connects to the armrest 4, and the lower side of the main body 123 is provided with a second connecting part 122 that connects to the angle adjustment mechanism. The first connecting part 121 and the outer armrest 4 are connected by a horizontal pivot. In this way, the backrest frame body 11 can rotate around the horizontal axis. The angle adjustment mechanism can drive the backrest frame body 11 to adjust the tilt angle and position it at the required angle by pushing and pulling the second connecting part 122.

[0053] It is noteworthy that in this embodiment, the main body 123 and reinforcing rib 13 of the angle-adjusting arm 12 are both embedded within the backrest frame body 11. Specifically, as shown... Figure 3 As shown, the reinforcing rib 13 includes an integral horizontal portion 131 and an inclined portion 132. The horizontal portion 131 extends approximately horizontally, and the inclined portion 132 forms an angle with both the horizontal portion 131 and the vertical direction, making the entire reinforcing rib 13 approximately L-shaped. The main body 123 of the angle-adjusting arm 12 is embedded in the lower end of the backrest frame body 11. The horizontal portion 131 of the reinforcing rib 13 is located above and connected to the main body 123. They do not need to be connected but can contact each other for mutual reinforcement. The main body 123 has upwardly extending extensions 124 on both sides, and the horizontal portion 131 is embedded between the two extensions 124, serving a limiting function. One end of the inclined portion 132 of the reinforcing rib 13 extends to the outer side of the top of the backrest frame body 11, and the other end of the inclined portion 132 connects to the inner end of the horizontal portion 131, which is close to the inner side of the seat. Figure 3 In the center, the direction closer to the center of the seat frame 100 is considered inward, and the opposite direction is considered outward. Specifically, as shown in... Figure 3 As shown, the backrest frame body 11 includes left and right sides. The side closest to the second connecting part 122 of the angle adjustment arm 12 on the left and right sides is the inner side, and the other side is the outer side. The second connecting part 122 needs to be connected to the angle adjustment mechanism for tilt angle adjustment. This position can be further strengthened. The inclined part 132 of the reinforcing rib 13 slopes from the inner end of the horizontal part 131 towards the upper outer side of the backrest frame body 11, which can better strengthen the entire backrest frame body 1.

[0054] You can continue to refer to this. Figure 5-7 understand, Figure 5 for Figure 3 Sectional view along axis AA; Figure 6 for Figure 3 BB-direction sectional view; Figure 7 for Figure 3 CC-direction sectional view.

[0055] The reinforcing rib 13 includes a plate portion 134. On both sides of the plate portion 134, there are first flanges 133 extending towards the front or rear side of the backrest frame body 11. The first flanges 133 are supported within the backrest frame body 11 along the extending direction. In this way, the plate portion 134 of the reinforcing rib 13 can be in contact with one of the front wall or the rear wall of the backrest frame body 11, while the first flanges 133 abut against the opposite one. In this way, while achieving the strengthening purpose, it can have a lighter mass. Figure 3 , 4 In, the plate portion 134 of the reinforcing rib 13 is specifically in contact with the front wall of the backrest frame body 11, and the first flanges 133 abut against the rear wall. It can be seen that it is also possible that the plate portion 134 is in contact with the rear wall of the backrest frame body 11 and the first flanges 133 abut against the front wall.

[0056] As Figure 5 shown, the edge of the first flange 133 has an extending second flange 135. The second flange 135 extends in a direction away from the plate portion 134. The first flange 133 and the second flange 135 together form an L-shaped flange. In this way, the cross-section of the reinforcing rib 13 forms a "ji" shape, or an "Ω" shape. At this time, the second flange 135 can be abutted against the backrest frame body 11. The main body portion 123 of the angle adjustment arm 12 is located below the horizontal portion 131 of the reinforcing rib 13, and on the inner and outer sides of the main body portion 123, there are upwardly extending extension portions 124. As Figure 6 shown, the extension portions 124 can abut against the first flange 133, and the extension portions 124 are located in the space between the first flange 133 and the second flange 135, which is equivalent to the extension portions 124 being embedded in the L-shaped flange. In this way, there is a certain positioning effect between the reinforcing rib 13 and the angle adjustment arm 12, and the position is more stable when being embedded in the backrest frame body 11, and it is beneficial to the mutual force transmission and mutual strengthening between the two.

[0057] Specifically, the horizontal portion 131 of the above-mentioned reinforcing rib 13 and the main body portion of the angle adjustment arm 12 both extend from the outside of the backrest frame body 11 to the inside, that is, the horizontal dimensions of the horizontal portion 131 and the main body portion in the transverse direction are basically the same as the transverse dimension of the backrest frame body 11, but are arranged inside the backrest frame body 11, so they are slightly smaller than the transverse dimension of the backrest frame body 11. In this way, the backrest frame body 11 can be strengthened as a whole, and the strengthening effect is better.

[0058] As Figure 1As shown, in this embodiment, the left and right sides, namely the outer and inner sides, of the backrest frame body 11 are respectively provided with forward-protruding protrusions 112. The protrusions 112 extend from the top to the bottom of the backrest frame body 11, and the part of the protrusions 112 at the upper end of the backrest frame body 11 is defined as the upper end of the protrusions 1121. The thickness of the upper end of the protrusions 1121 is greater than the thickness of other parts of the protrusions 112. The thickness of the upper end of the protrusions 1121 is relatively thick, which can serve as lateral support for the passenger's head. When the passenger is resting or sleeping, the head can lean against the upper end of the protrusions 1121, thereby improving the passenger's comfort. The part of the protrusions 112 below the head can provide a certain amount of support for the passenger's upper body, but the thickness is small, so it will not cause too much restraint to the passenger, and it will not interfere with the armrests 4.

[0059] Please continue to refer to this. Figure 8 understand, Figure 8 for Figure 1 A schematic diagram of the 11-part machining process of the backrest frame.

[0060] This embodiment also provides a processing technology for the backrest frame 1, the specific steps of which are as follows:

[0061] Fabrication of reinforcing rib 13 and angle-adjusting support arm 12, and fabrication of the front backrest component 11a and rear backrest component 11b of the backrest frame body 11 using composite materials (shown in... Figure 8 The front backrest component 11a and the rear backrest component 11b can be cured and molded in an autoclave.

[0062] The reinforcing rib 13 and the angle adjustment arm 12 are positioned to the front part 11a or the back part 11b of the backrest. The reinforcing rib 13 and the angle adjustment arm 12 can be positioned by auxiliary tooling.

[0063] Next, the front backrest component 11a and the rear backrest component 11b are assembled. They can be positioned and fixed using a molding die, and then placed together in a thermostatic precipitator for curing. Since the front backrest component 11a and the rear backrest component 11b are made of composite materials, they can be cured together with the reinforcing rib 13 and the angle adjustment arm 12 during the secondary curing process.

[0064] like Figure 8 As shown, the backrest frame body 11 is divided into a front backrest component 11a and a rear backrest component 11b. After curing, they form a hollow backrest frame body 11, achieving weight reduction while ensuring strength. The front backrest component 11a and the rear backrest component 11b can be designed with overlapping areas so that the joints can be better fused and cured into a single unit during autoclaving, resulting in sufficient strength. Figure 8In the middle, the front part 11a of the backrest is provided with a first overlapping edge 11a1, and the rear part 11b of the backrest is provided with a second overlapping edge 11b1. The first overlapping edge 11a1 and the second overlapping edge 11b1 are bonded and cured adhesive layer 14.

[0065] The backrest frame 1 of the seat frame 100 provided in this embodiment is a one-piece backrest frame body 11 made of composite material, which can reduce connection interfaces and reduce weight. At the same time, reinforcing ribs 13 and angle adjustment arms 12 are embedded in the backrest frame body 11. The reinforcing ribs 13 and angle adjustment arms 12 can be made of metal or other materials with higher strength to meet strength requirements. Furthermore, the horizontal part 131 and the diagonal part 132 of the reinforcing ribs 13 can be used to specifically strengthen the required positions while saving materials. In addition, it can be understood that since it is made of composite material, the backrest frame body 11 is easier to process into the required curved surfaces to improve the comfort of sitting.

[0066] Furthermore, such as Figure 9 , 10 As shown, Figure 9 for Figure 1 A schematic diagram showing the connection between the intermediate frame frame 2 and the base frame frame 3; Figure 10 for Figure 9 Schematic diagram of transfer frame 2; Figure 11 for Figure 10 A schematic diagram of the side 22 of the transfer frame 2 being inserted into the handrail 4.

[0067] The aforementioned backrest frame 1 is located on top of the rotating frame frame 2. The rotating frame frame 2 includes a one-piece rotating frame body made of composite material. The rotating frame body includes a seat plate 21, which simultaneously forms all the seats. Figure 10 For example, the seat plate 21 forms two seats, meaning the length of the seat plate 21 matches the number of seats in the entire seat frame 100. These seats are not directly for passengers to sit on; cushions or similar items can be added on top of the seats on the seat plate 21 for passengers to sit on directly. Furthermore, the frame body also includes side portions 22 located on the inner and outer sides of the seat plate 21 and extending upwards; that is, the left and right sides of the seat plate 21 have side portions 22. As shown in the figure, the side portions 22 are used to embed into and fix to the outer armrests 4. This arrangement makes the connection with the armrests 4 more reliable and allows for a concealed connection, meeting the aesthetic requirements of the seat frame 100.

[0068] like Figure 10 As shown, the middle part of the frame 2 body protrudes upward to form a protrusion 23, and the bottom surface of the protrusion 23 is correspondingly recessed upward to form a cavity. The cavity is used to accommodate and connect at least part of the rotating mechanism of the frame 2. That is, the protrusion 23 is a hollow structure used to accommodate at least part of the rotating mechanism.

[0069] like Figure 12 , 13 As shown, Figure 12 for Figure 9 A schematic diagram of a cross-sectional view along the left and right sides; Figure 13 for Figure 9 The front view shows the underframe 3 being fixedly connected to the vehicle body. One end of the underframe 3 can be fixedly connected to the bottom plate of the vehicle body, and the other end can be fixedly connected to the side wall of the vehicle body.

[0070] like Figure 12 As shown, the rotating mechanism includes a rotary bearing 5, which connects the rotating frame 2 and the base frame 3. The base frame 3 is fixed to the car body. When the rotary bearing 5 rotates, it drives the rotating frame 2 and the backrest frame 1 above it to rotate, achieving forward and backward rotation. When the rail vehicle changes direction, that is, when the rail vehicle changes from the rear to the front, all the seats that were originally facing forward will now face backward. At this time, it is necessary to rotate the seats to make them face forward again. This function is achieved by the rotating mechanism driving the rotating frame 2 to rotate 180°. Part of the rotating mechanism is housed in the cavity at the bottom of the protrusion 23, which provides housing space for the rotating mechanism and protects it.

[0071] In addition, such as Figure 10 As shown, the upper surface of the protrusion 23 of the rotating frame 2 is also provided with a boss 231. The boss 231 is specifically located on the rear side of the rotating frame 2 and is used for the middle handrail 4 to be overlapped and fixed. In order to improve the installation reliability, the upper surface of the protrusion 23 can also be provided with a boss 231 in other positions, such as a boss 231 in the front position, so that it can be connected to the middle handrail 4 in the front.

[0072] like Figure 9 , 10 As shown, the frame 2 body is provided with clearance holes or clearance grooves 232 to allow clearance for the second connecting part 122 connecting the angle-adjusting arm 12 and the armrest 4. When the backrest frame 1 is adjusted, the second connecting part 122 of the angle-adjusting arm 12 will have a certain swing amplitude; the clearance holes or clearance grooves 232 are provided to accommodate the movement envelope space of the second connecting part 122. Figure 9 , 10 The image shows clearance slot 232.

[0073] In addition, the bottom of the rotating frame 2 can be provided with a support protrusion 211 to support the bottom frame 3, which can assist the rotating mechanism in supporting the rotating frame 2 and the backrest frame 1. Several protrusion structures can be discretely arranged on the bottom of the rotating frame 2 as support protrusions 211. The support protrusions 211 can also be long strip structures. The protrusion structures help to reduce the friction when the rotating frame 2 rotates.

[0074] In addition, such as Figure 14 As shown, Figure 14 for Figure 1 A schematic diagram of the two-part machining process of the transfer frame frame.

[0075] This embodiment also provides the processing technology for the rotating frame 2, and the specific steps are as follows:

[0076] The upper segment 2a and lower segment 2b of the rotating frame 2 are fabricated using composite materials (shown in...). Figure 14 The upper component 2a and the lower component 2b of the rotating frame can be cured and formed in a thermostatic precipitator.

[0077] like Figure 14 As shown, the rotating frame 2 is divided into an upper component 2a and a lower component 2b. After curing, they form a hollow rotating frame 2, achieving weight reduction while maintaining strength. The upper component 2a and the lower component 2b can be designed with overlapping areas to ensure better fusion and curing at the joint during autoclaving, resulting in sufficient strength. Figure 14 In the middle, the upper part 2a of the rotating frame is provided with a third overlapping edge 2a1, and the lower part 2b of the rotating frame is provided with a fourth overlapping edge 2b1. The third overlapping edge 2a1 and the fourth overlapping edge 2b1 are overlapped and fixed, and the two are also bonded by a melted adhesive layer.

[0078] It is understandable that the rotating frame in the background technology also suffers from the problems of numerous interfaces and heavy weight. In this embodiment, the rotating frame frame 2 is made of composite material, which can also achieve the purpose of reducing interfaces and lightening weight. Moreover, the seat plate 21 of the rotating frame frame 2 can also be machined into a curved surface as needed to improve riding comfort.

[0079] Furthermore, combined Figure 13 Understand and refer to Figure 15 , Figure 15 for Figure 1 A schematic diagram of the three-part machining process of the mid-base frame.

[0080] In this embodiment, the underframe 3 comprises an integral underframe body made of composite material, specifically carbon fiber composite material. The underframe 3 includes a horizontally extending main body 31 and a bent portion 32 that bends downward from the inner end of the main body 31, which is the end of the seat frame 100 near the carriage aisle. The outer end of the main body 31 is connected to the side wall b of the rail vehicle, and the lower end of the bent portion 32 is connected to the floor a of the rail vehicle. By fixing the seat frame 100 using the side wall b, the outer end of the seat frame 100 does not need to have a downward bending structure, which saves material and reduces weight.

[0081] Specifically, the base frame 3 body may be provided with a support protrusion for supporting the seat rotation mechanism. The support protrusion can prevent stress concentration and damage when the rotation mechanism is supported on the upper surface of the seat frame 100 body.

[0082] like Figure 15 As shown, in this embodiment, the vertical cross-section of the base frame 3 along the front-to-back direction is arc-shaped. This design is beneficial for bearing and transmitting pressure loads, and also provides a good aesthetic appearance. In addition, to further ensure its overall rigidity and strength, an upwardly recessed portion is provided on the bottom surface of the base frame 3. The recessed portion extends along the inner and outer directions of the base frame 3 body, which can enhance the bending and torsional resistance of the entire seat frame 100 body.

[0083] This embodiment also provides the processing technology for the base frame 3, the specific steps of which are as follows:

[0084] The upper frame component 3a and the lower frame component 3b of the base frame 3 are fabricated using composite materials (shown in...). Figure 15 The upper component 3a and the lower component 3b of the base frame can be cured and molded in an autoclave.

[0085] like Figure 15 As shown, the base frame 3 is divided into an upper component 3a and a lower component 3b. After curing, they form a hollow base frame 3, achieving weight reduction while maintaining strength. The upper component 3a and the lower component 3b can be designed with overlapping areas to ensure better fusion and curing at the joint during autoclaving, resulting in sufficient strength. Figure 15 In the middle, the upper part 3a of the base frame is provided with a fifth overlapping edge 3a1, and the lower part 3b of the base frame is provided with a sixth overlapping edge 3b1. The fifth overlapping edge 3a1 and the sixth overlapping edge 3b1 are overlapped and fixed, and the two are also bonded by a melted adhesive layer.

[0086] It is understandable that the chassis in the background technology also has the problems of many interfaces and heavy weight. In this embodiment, the chassis frame 3 is made of composite material, which can also achieve the purpose of reducing interfaces and reducing weight.

[0087] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A seat frame, characterized by, The backrest framework comprises an integrated backrest framework body made of composite material, the seat framework further comprises an angle adjustment arm and a reinforcing rib, the angle adjustment arm comprises a main body part and a connecting part, the connecting part is used for connecting with an armrest or an angle adjustment mechanism, the main body part of the angle adjustment arm and the reinforcing rib are embedded in the backrest framework body; The reinforcing rib comprises an integrated horizontal part and an inclined part, the main body part of the angle adjustment arm is located at the lower end of the backrest framework body, the horizontal part is located above the main body part and connected with the main body part, one end of the inclined part of the angle adjustment arm extends to the outside of the top of the backrest framework body, and the other end of the inclined part is connected with the inner end of the horizontal part. The reinforcing rib comprises a plate part, the two sides of the plate part are provided with first flanges extending towards the front side or the rear side of the backrest framework body, and the first flanges are supported in the backrest framework body along the extending direction. The edges of the first flanges are provided with second flanges extending therefrom, the second flanges abut against the backrest framework body, the inner and outer sides of the main body part of the angle adjustment arm are provided with extending parts extending upward, the extending parts abut against the first flanges, and at least part of the extending parts is located in the space between the first flanges and the second flanges.

2. The seat frame according to claim 1, characterized in that, The horizontal part and the main body part of the angle adjustment arm both extend from the outside to the inside of the backrest framework body.

3. The seat frame according to claim 1, characterized in that, The outside and the inside of the backrest framework body are provided with protrusions protruding forward, the protrusions extend from the top to the bottom of the backrest framework body, and the thickness of the part of the protrusions at the upper end of the backrest framework body is greater than the thickness of other parts.

4. The seat frame according to any one of claims 1 to 3, characterized in that The seat framework further comprises a swivel framework, the swivel framework comprises an integrated swivel framework body made of composite material, the swivel framework body comprises a seat plate and side parts located at the left and right sides of the seat plate, the side parts extend upward, and the side parts are embedded in corresponding armrests and fixed with the corresponding armrests.

5. The seat frame according to claim 4, characterized in that, The middle part of the seat plate is protruded upward to form a protruding part, the bottom surface of the protruding part is recessed upward to form a recess, and the recess is used for accommodating at least part of a rotating mechanism connected with the swivel framework.

6. The seat frame according to claim 5, characterized in that The upper surface of the protruding part is further provided with a boss for lap joint fixing with a corresponding armrest.

7. The seat frame according to claim 4, characterized in that, The swivel framework body is provided with an avoiding hole or an avoiding groove for avoiding the connecting part connecting the angle adjustment arm and the armrest.

8. The seat frame according to claim 4, characterized in that, The bottom of the seat plate is provided with a supporting protrusion for supporting the bottom framework of the seat framework.

9. The seat frame according to any one of claims 1 to 3, characterized in that, The seat framework further comprises a bottom framework, the bottom framework comprises an integrated bottom framework body made of composite material, the bottom framework body comprises a main body part extending horizontally and a bent part bent downward from the inner end of the main body part, the outer end of the main body part is connected with the side wall of a railway vehicle, and the lower end of the bent part is connected with the floor of the railway vehicle.

10. The seat frame according to claim 9, characterized in that, The bottom framework body is provided with a supporting protrusion for supporting a rotating mechanism of a seat.

11. The seat frame of claim 9, wherein The seat framework body is arc-shaped in vertical section along the front-rear direction; and / or, the bottom surface of the bottom framework body is provided with a recess recessed upward.

12. A process for manufacturing a seat frame according to any one of claims 1-11, characterized in that The method for processing the backrest framework comprises the following steps: The method for processing the backrest framework comprises the following steps: Preparation of the reinforcing rib and the angle-adjusting arm, and preparation of the backrest front part and the backrest rear part of the backrest body of the backrest skeleton body by composite material; Positioning the reinforcing rib and the angle-adjusting arm to the backrest front part or the backrest rear part; Mating the backrest front part and the backrest rear part and placing them in a hot press tank for curing and forming.

13. A rail vehicle, characterized by The vehicle body is provided with the seat skeleton according to any one of claims 1-11.

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