Car bottom support assembly, car and elevator

Abstract

The application provides a car bottom support assembly, a car and an elevator. The car bottom support assembly comprises a car bottom structure, a first support assembly, two second support assemblies and two reinforcing assemblies. The first support assembly is connected to the bottom end of the car bottom structure. The first support assembly comprises a plurality of support units arranged at intervals along a second extension direction. The two second support assemblies are distributed at intervals along a first extension direction on both sides of the bottom end of the first support assembly. Each second support assembly comprises a plurality of first support members arranged at intervals along the second extension direction. The two reinforcing assemblies are arranged in one-to-one correspondence with the two second support assemblies. Each reinforcing assembly comprises a plurality of reinforcing members arranged at intervals along the second extension direction. The plurality of reinforcing members are arranged in one-to-one correspondence with the plurality of first support members. The reinforcing members are connected between the corresponding support units and the corresponding first support members, and extend obliquely. The operation safety of the elevator is high.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to a car bottom support assembly, a car using the car bottom support assembly, and an elevator using the car. Background Technology

[0002] Heavy-duty freight elevators are widely used in industrial production, logistics and transportation, and the stability of their chassis is directly related to the safety of cargo transportation and the service life of the equipment.

[0003] Currently, the chassis structure of heavy-duty freight elevators typically includes an upper car bottom, a lower connecting I-beam, a lower beam, and a lower beam connecting I-beam. The lower connecting I-beam is connected to the bottom end of the upper car bottom, the lower beam is connected to the bottom end of the lower connecting I-beam, the lower beam connecting I-beam is connected to the lower beam, and the top end of the lower beam connecting I-beam abuts against the lower connecting I-beam.

[0004] However, the chassis of the aforementioned freight elevators has poor stability and is prone to tipping over under conditions such as uneven loading of goods or vibration during operation, posing a significant threat to the safety of goods and equipment. Utility Model Content

[0005] This application provides a car bottom support assembly, a car, and an elevator. The car bottom support assembly has high resistance to lateral displacement and torsional stiffness, which improves the operational safety of the elevator.

[0006] In a first aspect, this application provides a car floor support assembly, including a car floor structure, a first support assembly, two second support assemblies, and two reinforcing assemblies. The car floor structure has a first extending direction, a second extending direction, and a third extending direction that are perpendicular to each other. The dimension of the car floor structure in the first extending direction is larger than the dimension of the car floor structure in the second extending direction, and the dimension of the car floor structure in the second extending direction is larger than the dimension of the car floor structure in the third extending direction. The first support assembly is connected to the bottom end of the car floor structure and includes a plurality of support units spaced apart along the second extending direction. The two second support assemblies are spaced apart on both sides of the bottom end of the first support assembly along the first extending direction, and each second support assembly includes a plurality of first support members spaced apart along the second extending direction. The two reinforcing assemblies are arranged one-to-one with the two second support assemblies, and each reinforcing assembly includes a plurality of reinforcing members spaced apart along the second extending direction. The plurality of reinforcing members are arranged one-to-one with the plurality of first support members, and the reinforcing members are connected between the corresponding support unit and the corresponding first support member, and the reinforcing members extend at an angle.

[0007] As an optional implementation, the car bottom support assembly provided in this application further includes two foot guards, which are respectively connected to opposite ends of the first support assembly along the first extension direction; the reinforcing member has a first end and a second end, the first end is located above the second end, the first end is connected to the support unit and is disposed close to the foot guard, and the second end is connected to the first support member and is disposed away from the foot guard.

[0008] As an optional implementation, the first end of the reinforcing member is a first end plate that extends horizontally and is detachably connected to the support unit; the second end of the reinforcing member is a second end plate that extends vertically and is detachably connected to the first support member.

[0009] As an optional implementation, each support unit includes multiple second support members spliced ​​together along a first extending direction, and a reinforcing member is connected between the corresponding second support member and the corresponding first support member.

[0010] As an optional implementation, the car floor structure includes a plurality of car floor units spliced ​​together along a first extending direction, with a first splice seam formed between two adjacent car floor units; in each support unit, a second splice seam is formed between two adjacent second support members; wherein the first splice seam and the second splice seam are staggered in the first extending direction, and the second splice seams of two adjacent support units are staggered in the first extending direction.

[0011] As an optional implementation, the car bottom unit includes a top plate and a plurality of support beams connected to the bottom end of the top plate. The plurality of support beams are arranged at intervals along a first extending direction. The support beams are connected to a second support member. Two adjacent car bottom units are connected by two support beams arranged in opposite directions. The two support beams are detachably connected by fasteners.

[0012] As an optional implementation, the car bottom support assembly provided in this application further includes multiple crossbeam units; the multiple crossbeam units are connected to the bottom ends of multiple support units, the multiple crossbeam units are arranged at intervals along a first extending direction, the multiple crossbeam units include two end crossbeam units located at the ends, each crossbeam unit includes two crossbeams arranged at intervals along the first extending direction, the two crossbeams are arranged opposite to each other; two second support assemblies are arranged one-to-one with the two end crossbeam units, each second support assembly is connected between the two crossbeams of the corresponding end crossbeam unit.

[0013] As an optional implementation, the car bottom support assembly provided in this application further includes two sill assemblies, which are connected to the top of the first support assembly and to both ends of the car bottom structure along the first extension direction; the sill assembly includes a bracket and a sill connected together, the first support assembly and the car bottom structure are both connected to the bracket, and the sill is connected to the top of the bracket.

[0014] Secondly, this application provides a car body, including a car body, a guardrail assembly, and the aforementioned car bottom support assembly; the car body is connected to the top of the car bottom structure; the guardrail assembly includes two guardrail units, which are connected to both ends of the car body along a second extending direction, and each guardrail unit includes multiple guardrails spliced ​​together along a first extending direction.

[0015] Thirdly, this application provides an elevator, including the aforementioned car.

[0016] The car bottom support assembly, car, and elevator provided in this application incorporate a reinforcing component between the first and second support assemblies. This reinforcing component includes multiple reinforcing members that extend at an angle. Thus, when the elevator is subjected to eccentric loads or operational vibration loads, the reinforcing members can decompose the overturning moment and shear force acting on the elevator bottom into components along their own tilting direction, dispersing them throughout the load-bearing system formed by the first and second support assemblies. This force decomposition and dispersion effect enhances the lateral and torsional stiffness of the car bottom support assembly, effectively suppressing the tendency for bottom structure instability caused by uneven loads or dynamic loads. This strengthens the overall stability of the bottom structure, ensures the rationality of the stress distribution and geometric stability of the car bottom structure under heavy load conditions, improves the operational safety of the elevator provided in this application, and extends its service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of a partial structure of an elevator provided in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the planar structure shown; Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point A; Figure 4 for Figure 2 An enlarged schematic diagram of the first partial structure of the structure shown; Figure 5 A schematic diagram illustrating the splicing scheme between the car bottom structure and the first support component in the elevator provided in this application embodiment; Figure 6 for Figure 2 A schematic diagram of the second partial structure shown; Figure 7 for Figure 6 A magnified view of the local structure at point B.

[0019] Explanation of reference numerals in the attached figures: 1. Car floor structure; 2. First support assembly; 3. Crossbeam unit; 4. Second support assembly; 5. Reinforcing assembly; 6. Foot guard plate; 7. Sill assembly; 8. Car body; 9. Fasteners; 11. Car floor unit; 12. First splice joint; 21. Support unit; 31. End beam unit; 32. Beam; 41. First support member; 51. Reinforcing member; 71. Bracket; 72. Sill; 111. Top slab; 112. Support beam; 121. First joint segment; 122. Second joint segment; 211. Second support member; 212. Second splice joint; 511. First end; 512. Second end; 130. Guardrail assembly; 131. Guardrail unit; 1311. Guardrail.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0022] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] Currently, the chassis structure of heavy-duty freight elevators typically includes an upper car floor, a lower connecting I-beam, a lower beam, and a lower beam connecting I-beam. The lower connecting I-beam is connected to the bottom end of the upper car floor, the lower beam is connected to the bottom end of the lower connecting I-beam, and the lower beam connecting I-beam is connected to the lower beam, with its top end abutting against the lower connecting I-beam. However, the chassis stability of these freight elevators is relatively poor, and they are prone to tipping over under conditions of uneven loading or operational vibrations, posing a significant safety hazard to goods and equipment.

[0024] Based on this, embodiments of this application provide a car bottom support assembly, a car, and an elevator. By providing inclined and extended reinforcing members, the anti-lateral displacement and anti-torsional stiffness of the car bottom support assembly can be improved, thereby enhancing the operational safety of the elevator.

[0025] It should be noted that the elevators provided in this application embodiment include, but are not limited to, heavy-duty freight elevators. The specific type of elevator provided in this application embodiment is not limited herein.

[0026] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.

[0027] Please combine Figures 1 to 4 , Figure 1 This is a three-dimensional structural diagram of a partial structure of the elevator provided in an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the planar structure shown. Figure 3 for Figure 1 A magnified view of the local structure at point A. Figure 4 for Figure 2 An enlarged schematic diagram of the first partial structure of the structure shown.

[0028] As shown in the figure, this embodiment provides a car floor support assembly, including a car floor structure 1, a first support assembly 2, two second support assemblies 4, and two reinforcing assemblies 5. The car floor structure 1 has mutually perpendicular first, second, and third extending directions. The dimension of the car floor structure 1 in the first extending direction is larger than its dimension in the second extending direction, and the dimension of the car floor structure 1 in the second extending direction is larger than its dimension in the third extending direction. The first extending direction can be understood as the length direction of the car floor structure 1, i.e. Figures 1 to 3 In the XX axis direction, the second extension direction can be understood as the width direction of the car bottom structure 1, that is... Figure 1 and Figure 2 In the YY axis direction, the third extension direction can be understood as the height direction of the car bottom structure 1, that is... Figure 1 and Figure 3 The ZZ axis direction in the diagram.

[0029] The first support component 2 is connected to the bottom end of the car bottom structure 1. The first support component 2 includes multiple support units 21 arranged at intervals along the second extension direction. Two second support components 4 are distributed at intervals on both sides of the bottom end of the first support component 2 along the first extension direction. Each second support component 4 includes multiple first support members 41 arranged at intervals along the second extension direction. Two reinforcing components 5 are arranged in a one-to-one correspondence with the two second support components 4. Each reinforcing component 5 includes multiple reinforcing members 51 arranged at intervals along the second extension direction. The multiple reinforcing members 51 are arranged in a one-to-one correspondence with the multiple first support members 41. The reinforcing members 51 are connected between the corresponding support unit 21 and the corresponding first support member 41, and the reinforcing members 51 extend at an angle.

[0030] Thus, when the elevator provided in this embodiment is subjected to eccentric loads or operating vibration loads, the reinforcing member 51 can decompose the overturning moment and shear force acting on the bottom of the elevator into components along its own tilt direction, and then distribute them to the load-bearing system composed of the first support component 2 and the second support component 4. This force decomposition and dispersion effect improves the lateral displacement and torsional stiffness of the car bottom support component, effectively suppresses the tendency of the bottom structure to become unstable due to uneven loads or dynamic loads, enhances the overall stability of the bottom structure, ensures the rationality of the stress and geometric stability of the car bottom structure under heavy load conditions, improves the operational safety of the elevator provided in this embodiment, and extends the service life of the elevator provided in this embodiment.

[0031] It should be noted that in some specific embodiments, the first support member 41 extends along the first extending direction, and both the first support member 41 and the reinforcing member 51 can be channel steel. Here, there are no specific limitations on the types of the first support member 41 and the reinforcing member 51.

[0032] Furthermore, the car bottom structure 1 includes a plurality of car bottom units 11 spliced ​​together along a first extending direction, and a first splicing seam 12 is formed between two adjacent car bottom units 11; each support unit 21 includes a plurality of second support members 211 spliced ​​together along the first extending direction, and a second splicing seam 212 is formed between two adjacent second support members 211; wherein, the first splicing seam 12 and the second splicing seam 212 are staggered in the first extending direction, and the second splicing seams 212 of two adjacent support units 21 are staggered in the first extending direction.

[0033] This allows the dimensions of the individual car bottom unit 11 and the second support member 211 to be adapted to conventional transportation vehicles, which to some extent solves the transportation problems caused by the oversized molded components in related technologies; at the same time, modular splicing replaces complex on-site welding, simplifies the installation process, shortens the installation cycle, and improves assembly efficiency.

[0034] Furthermore, by defining the positions of the first splice seam 12 and the second splice seam 212, the defect of stress concentration when splicing with the same seam is avoided. Moreover, the huge impact load of loading and unloading goods is distributed layer by layer to different seams and support units 21 through multi-level staggered joints, avoiding damage to a single part due to load concentration, and improving the overall load-bearing strength and stability of the structure.

[0035] It should be noted that, in the specific implementation of this embodiment, the second support member 211 described above may be an I-beam extending along the first extending direction. Here, the type of the second support member 211 is not specifically limited.

[0036] like Figure 4 As shown, the car bottom support assembly provided in this embodiment also includes two foot protection plates 6, which are respectively connected to the opposite ends of the first support assembly 2 along the first extension direction; the reinforcing member 51 has a first end 511 and a second end 512, the first end 511 is located above the second end 512, the first end 511 is connected to the second support member 211 and is disposed close to the foot protection plate 6, and the second end 512 is connected to the first support member 41 and is disposed away from the foot protection plate 6.

[0037] Among them, the two foot guards 6 can not only provide physical protection for the end structure of the first support component 2, avoiding collision damage to the end component during cargo loading and unloading, but also enhance the overall structural stability of the first support component 2 by sealing the end, reducing the risk of deformation caused by load on the end.

[0038] The inclined arrangement of the reinforcing member 51, with its first end 511 close to the foot guard plate 6 and connected to the second support member 211, and its second end 512 far from the foot guard plate 6 and connected to the first support member 41, forms an inclined support path extending from the end of the first support assembly 2 towards the internal support structure. This arrangement allows external impacts or concentrated loads at the end of the foot guard plate 6 to be quickly transferred through the reinforcing member 51 to the base frame formed by the second support assembly 4 and the crossbeam unit 3, preventing load accumulation at the end. At the same time, this inclined support enhances the connection strength between the end of the first support assembly 2 and the bottom support structure, further improving the impact resistance of the end structure and the overall load-bearing reliability.

[0039] In some specific embodiments, the first end 511 of the reinforcing member 51 is a first end plate connected to the second support member 211, and the second end 512 of the reinforcing member 51 is a second end plate connected to the first support member 41. The first end plate extends horizontally, and the second end plate extends vertically. The first end plate and the second support member 211 are detachably connected by screws or other threaded fasteners, and the second end plate and the first support member 41 are detachably connected by screws or other threaded fasteners. Here, no specific limitations are placed on the connection method between the reinforcing member 51 and the first support member 41.

[0040] By connecting the reinforcing member 51 between the second support member 211 and the first support member 41 through a detachable connection method, the assembly efficiency between the reinforcing component 5, the first support component 2 and the second support component 4 can be improved.

[0041] Please continue to combine Figure 5 , Figure 5 This is a schematic diagram illustrating the splicing scheme of the car bottom structure and the first support component in the elevator provided in this application embodiment. To further improve the impact resistance of the car bottom structure 1, in some embodiments, the car bottom support component provided in this embodiment further includes multiple crossbeam units 3; the multiple crossbeam units 3 are connected to the bottom ends of multiple support units 21, the multiple crossbeam units 3 are arranged at intervals along the first extension direction, the multiple crossbeam units 3 include two end crossbeam units 31 located at the ends, each crossbeam unit 3 includes two crossbeams 32 arranged at intervals along the first extension direction, the two crossbeams 32 are arranged back to back; two second support components 4 are arranged one-to-one with the two end crossbeam units 31, each second support component 4 is connected between the two crossbeams 32 of the corresponding end crossbeam unit 31.

[0042] Among them, the crossbeam unit 3 can quickly spread the heavy load transmitted by the first support component 2 to a larger force-bearing surface, avoiding excessive local pressure.

[0043] Furthermore, the car bottom support assembly provided in this embodiment also includes two sill assemblies 7, which are connected to the top of the first support assembly 2 and to both ends of the car bottom structure 1 along the first extending direction. Specifically, the upper end of the foot protector 6 extends above the first support assembly 2 and connects to the sill assembly 7, and the lower end of the foot protector 6 extends below the first support assembly 2.

[0044] Among them, the sill assembly 7, as the core connecting component between the car body 8 and the landing, has an end installation method that can create a smooth transition surface, avoiding the problems of goods getting stuck or tipping over due to connection gaps or height differences during loading and unloading, thus improving operational safety and efficiency. The car body 8 is connected to the top of the car bottom structure 1.

[0045] In addition, the connection between the sill assembly 7 and the first support assembly 2 forms an additional end force-bearing node, which allows the end load to be directly transferred to the support system, optimizes the load transfer path and complements the end reinforcement structure, and at the same time realizes the end positioning and reinforcement of the car bottom structure 1, reducing the risk of deformation under heavy load.

[0046] The specific structure of the sill assembly 7 can be as follows: the sill assembly 7 includes a bracket 71 and a sill 72 connected together. Specifically, the bracket 71 and the sill 72 are welded together. The top ends of the second support member 211, the car bottom structure 1, and the foot guard plate 6 are all connected to the bracket 71, and the sill 72 is connected to the top end of the bracket 71. In this way, the bracket 71 and the sill 72 are connected as a whole, which not only provides stable support for the sill 72, preventing it from deforming and shifting during cargo loading and unloading and elevator operation, but also simplifies the assembly process of the sill assembly 7.

[0047] In a specific embodiment of this invention, the bracket 71 is welded to the second support member 211, and the bracket 71 is connected to the car bottom structure 1 and to the top of the foot guard plate 6 by screws or other threaded fasteners. Here, the connection method between the sill assembly 7 and other structures is not specifically limited.

[0048] Please continue to combine Figure 6 and Figure 7 , Figure 6 for Figure 2 A schematic diagram of the second partial structure of the structure shown. Figure 7 for Figure 6 A magnified view of the partial structure at point B. The structure of the car bottom unit 11 can be as follows: the car bottom unit 11 includes a top plate 111 and multiple support beams 112 connected to the bottom end of the top plate 111. The multiple support beams 112 are arranged at intervals along a first extending direction; the support beams 112 are connected to the second support member 211; two adjacent car bottom units 11 are connected by two back-to-back support beams 112, and the two support beams 112 are detachably connected by fasteners 9.

[0049] In this way, the load-bearing strength of the car bottom unit 11 is guaranteed, and the connection between the support beam 112 and the second support member 211 is used to achieve a stable connection between the car bottom structure 1 and the first support component 2. Moreover, adjacent car bottom units 11 are connected by two back-to-back support beams 112 and can be detachably connected by fasteners 9. This not only eliminates the cumbersome process of on-site welding and improves assembly efficiency, but also allows for flexible adaptation to different size requirements. At the same time, the detachable design also provides convenience for subsequent maintenance and replacement of parts, taking into account both structural stability and usage flexibility.

[0050] Specifically, the first splice joint 12 includes a first joint segment 121 and a second joint segment 122. The first joint segment 121 is formed between two adjacent top plates 111, and the second joint segment 122 is formed between two support beams 112 that are connected together and arranged opposite each other.

[0051] The top plate 111 is welded to the support beam 112, and the support beam 112 is detachably connected to the second support member 211 by screws or other threaded fasteners. The connection method between the top plate 111 and the support beam 112, and between the support beam 112 and the second support member 211, is not specifically limited here.

[0052] This embodiment also provides a car, including a car body 8, a guardrail assembly 130, and a car bottom support assembly as described in the above embodiments; the guardrail assembly 130 includes two guardrail units 131, which are connected to both ends of the car body 8 along the second extension direction, and each guardrail unit 131 includes multiple guardrails 1311 spliced ​​together along the first extension direction.

[0053] Among them, the two guardrail units 131 are respectively located at the left and right ends of the car body 8, which can form boundary protection and clearly define the safe working area; the design of multiple guardrails 1311 spliced ​​along the first extension direction can be adapted to the top of the car body 8 of different lengths, which not only ensures full coverage of the protection range, but also facilitates disassembly, transportation and on-site installation. If a part is damaged, it can be replaced individually without affecting the overall protective function of the guardrail component 130.

[0054] The car provided in this embodiment has good stability due to the use of the car bottom support components described above.

[0055] This embodiment also provides an elevator, including the car described in the above embodiments. The structure of the car has been detailed in the above embodiments and will not be repeated here. The elevator provided in this embodiment should also include other modules or components that enable the elevator to operate normally, which will not be described one by one here.

[0056] The elevator provided in this embodiment has a high level of operational safety by using the aforementioned car.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A car bottom support assembly, characterized in that, include: A car floor structure having a first extending direction, a second extending direction, and a third extending direction that are perpendicular to each other, wherein the dimension of the car floor structure in the first extending direction is greater than the dimension of the car floor structure in the second extending direction, and the dimension of the car floor structure in the second extending direction is greater than the dimension of the car floor structure in the third extending direction; A first support assembly is connected to the bottom end of the car floor structure. The first support assembly includes a plurality of support units arranged at intervals along the second extending direction. Two second support components are spaced apart on both sides of the bottom end of the first support component along the first extending direction; each second support component includes a plurality of first support members spaced apart along the second extending direction; and Two reinforcing components are provided, each corresponding to one of the two second supporting components. Each reinforcing component includes multiple reinforcing members spaced apart along the second extending direction. The multiple reinforcing members are provided, each corresponding to one of the multiple first supporting members. The reinforcing members are connected between the corresponding supporting unit and the corresponding first supporting member, and the reinforcing members extend at an angle.

2. The car bottom support assembly according to claim 1, characterized in that, It also includes two foot guards, which are respectively connected to opposite ends of the first support assembly along the first extension direction; The reinforcing member has a first end and a second end. The first end is located above the second end and is connected to the support unit. The first end is located close to the foot protector. The second end is connected to the first support member and is located away from the foot protector.

3. The car bottom support assembly according to claim 2, characterized in that, The first end of the reinforcing member is a first end plate, which extends horizontally and is detachably connected to the support unit. The second end of the reinforcing member is a second end plate, which extends vertically and is detachably connected to the first supporting member.

4. The car bottom support assembly according to any one of claims 1 to 3, characterized in that, Each of the support units includes a plurality of second support members spliced ​​together along the first extension direction, and the reinforcing member is connected between the corresponding second support member and the corresponding first support member.

5. The car bottom support assembly according to claim 4, characterized in that, The car floor structure includes multiple car floor units spliced ​​together along the first extending direction, and a first splicing seam is formed between two adjacent car floor units; In each of the support units, a second splicing seam is formed between two adjacent second support members; The first splicing seam and the second splicing seam are staggered in the first extension direction, and the second splicing seams of two adjacent support units are staggered in the first extension direction.

6. The car bottom support assembly according to claim 5, characterized in that, The car bottom unit includes a top plate and a plurality of support beams connected to the bottom end of the top plate, and the plurality of support beams are arranged at intervals along the first extending direction; The support beam is connected to the second support member, and two adjacent car bottom units are connected by two support beams arranged in opposite directions. The two support beams are detachably connected by fasteners.

7. The car bottom support assembly according to any one of claims 1 to 3, 5 to 6, characterized in that, It also includes multiple beam units; Multiple beam units are connected to the bottom of multiple support units. The multiple beam units are arranged at intervals along the first extension direction. Each beam unit includes two end beam units located at the ends. Each beam unit includes two beams arranged at intervals along the first extension direction. The two beams are arranged opposite each other. The two second support components are arranged in a one-to-one correspondence with the two end beam units, and each second support component is connected between the two beams of the corresponding end beam unit.

8. The car bottom support assembly according to any one of claims 1 to 3, 5 to 6, characterized in that, It also includes two sill assemblies, which are connected to the top of the first support assembly and to both ends of the car floor structure along the first extending direction. The sill assembly includes a bracket and a sill connected together, the first support assembly and the car floor structure are both connected to the bracket, and the sill is connected to the top of the bracket.

9. A type of sedan chair, characterized in that, Includes the car body, guardrail assembly, and car bottom support assembly as described in any one of claims 1 to 8; The main body of the car is connected to the top of the car bottom structure; The guardrail assembly includes two guardrail units, which are connected to both ends of the car body along the second extending direction. Each guardrail unit includes multiple guardrails spliced ​​together along the first extending direction.

10. An elevator, characterized in that, Includes the car as described in claim 9.

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