Carriage with double-layer chassis and vehicle

Abstract

The compartment with the double-layer chassis comprises a compartment body, a movable bottom plate and a lifting driving mechanism, the lifting driving mechanism comprises a first hydraulic cylinder, a flexible connecting piece, a fixed pulley assembly and a movable pulley assembly, and the mounting end of the first hydraulic cylinder and the mounting end of the fixed pulley assembly are both fixedly connected with the compartment body. The mounting end of the movable pulley assembly is connected with the output end of the first hydraulic cylinder, the fixed end of the flexible connecting piece is connected with the carriage body, the free end of the flexible connecting piece sequentially bypasses the movable pulley assembly and the fixed pulley assembly and then is connected with the movable bottom plate, and the top dead center of the movable pulley assembly is lower than the bottom end of the fixed pulley assembly and the fixed end of the flexible connecting piece. The flexible connecting piece, the fixed pulley assembly and the movable pulley assembly of the lifting driving mechanism form a movable pulley labor-saving system, so that the force borne by the first hydraulic cylinder is halved, a large-diameter oil cylinder does not need to be used, the space is saved, the cost is reduced, and meanwhile, the service life of the oil cylinder is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of carriage, especially a carriage with double chassis and vehicle. BACKGROUND

[0002] In the field of goods transportation, the goods loading capacity of single-layer carriage truck is limited, especially for non-stackable goods, the upper space utilization rate is low after filling the bottom layer of the goods box. To solve this problem, a carriage truck with double chassis appears, which is installed with movable plates that can be lifted to different heights in the carriage, which is convenient for layered loading and unloading of goods and meets the diversified cargo loading demand.

[0003] For example, the patent with publication number CN2355948Y discloses a multi-layer transport vehicle with an upper layer that can be lifted by an oil cylinder. However, this scheme has obvious defects: the oil cylinder needs to completely bear the weight of the movable bottom plate and the goods it carries, resulting in a large pressure on the oil cylinder, which requires a larger diameter oil cylinder to meet the pressure requirement, which not only occupies a larger space, but also increases the cost; moreover, the larger pressure will exacerbate the wear of the oil cylinder, reduce its service life, and also adversely affect the overall stability of the vehicle. SUMMARY

[0004] Therefore, it is necessary to provide a carriage with double chassis and vehicle to solve the problems of large oil cylinder pressure and large space occupation by optimizing the lifting drive mechanism and reducing the stress on the oil cylinder to improve the space utilization.

[0005] To achieve the above purpose, the utility model provides a carriage with double chassis, which comprises a carriage body, a movable bottom plate and a lifting drive mechanism for driving the movable bottom plate to move up and down in the carriage body, the lifting drive mechanism comprises a first hydraulic cylinder, a flexible connecting piece, a fixed pulley assembly, a movable pulley assembly, the mounting end of the first hydraulic cylinder and the fixed pulley assembly are fixedly connected with the carriage body, the mounting end of the movable pulley assembly is connected with the output end of the first hydraulic cylinder, the fixed end of the flexible connecting piece is connected with the carriage body, the free end of the flexible connecting piece is connected with the movable bottom plate after passing through the movable pulley assembly and the fixed pulley assembly in sequence, and the upper dead point of the movable pulley assembly is lower than the bottom end of the fixed pulley assembly and the fixed end of the flexible connecting piece. The flexible connecting piece, the fixed pulley assembly and the movable pulley assembly of the lifting drive mechanism form a movable pulley power-saving system, so that the force borne by the first hydraulic cylinder is reduced by half, the stress on the oil cylinder is reduced, and a smaller diameter oil cylinder can be selected to save space.

[0006] Preferably, the two-layer fixing assembly further comprises an upper positioning groove, a lower positioning groove, a fixing pin shaft, and a fixing member, the upper positioning groove and the lower positioning groove are fixedly connected to the compartment body, the upper positioning groove and the lower positioning groove are each provided with a pin hole for inserting the fixing pin shaft, the fixing member comprises a fixing sleeve and a fixing plate, the fixing sleeve is located between the upper positioning groove and the lower positioning groove and is sleeved on the fixing pin shaft, the fixing plate is fixedly connected to the fixing sleeve, the vertical projection of the fixing plate on the activity floor is coincident, and the vertical projections of the upper positioning groove and the lower positioning groove on the activity floor are not coincident. The two-layer fixing assembly is used for positioning and fixing the activity floor, and ensures that the activity floor is stable and reliable during transportation.

[0007] Preferably, the compartment body comprises a fixed floor, front upright columns, rear upright columns, and a middle upright column, the fixed floor is provided with the front upright columns on both sides of the front end, the fixed floor is provided with the rear upright columns on both sides of the rear end, the middle upright column is located between the front upright columns and the rear upright columns, the front upright columns and the rear upright columns are each provided with a lifting driving mechanism, and the front upright columns, the rear upright columns, and the middle upright column are each provided with a two-layer fixing assembly. This distribution mode of the upright columns uniformly distributes the lifting driving mechanisms and the two-layer fixing assemblies, and ensures that the activity floor is balanced in force and smoothly lifted.

[0008] Preferably, the compartment body comprises a fixed floor, front upright columns, rear upright columns, and a middle upright column, the fixed floor is provided with the front upright columns on both sides of the front end, the fixed floor is provided with the rear upright columns on both sides of the rear end, the middle upright column is located between the front upright columns and the rear upright columns, the front upright columns and the rear upright columns are each provided with a lifting driving mechanism, and the front upright columns, the rear upright columns, and the middle upright column are each provided with a two-layer fixing assembly. This distribution mode of the upright columns uniformly distributes the lifting driving mechanisms and the two-layer fixing assemblies, and ensures that the activity floor is balanced in force and smoothly lifted.

[0009] Preferably, the movable pulley assembly comprises a connecting plate, a lower connecting shaft, an upper connecting shaft, and a movable pulley, the connecting plate is provided in two, the lower connecting shaft and the upper connecting shaft are connected to the two connecting plates, the lower connecting shaft is connected to the output end of the first hydraulic cylinder, the upper connecting shaft is rotatably connected to the two connecting plates, and the movable pulley is fixedly installed on the upper connecting shaft. Such a structure design enables the movable pulley to rotate flexibly and ensures smooth operation of the flexible connecting member.

[0010] Preferably, the fixed pulley assembly comprises a fixed seat, a fixed shaft, and a fixed pulley, the fixed seat is fixedly connected to the compartment body, the fixed shaft is rotatably connected to the fixed seat, and the fixed pulley is fixedly installed on the fixed shaft. The fixed pulley is used for changing the force direction of the flexible connecting member and forms a labor-saving system in cooperation with the movable pulley assembly.

[0011] Preferably, the lifting driving mechanism further comprises a lifting connecting member, an upper fixing member, and a lower fixing member, the upper fixing member is fixedly connected to the compartment body, the fixed end of the flexible connecting member is connected to the upper fixing member, the lower fixing member is fixedly connected to the lifting connecting member, the lifting connecting member is fixedly connected to the activity floor, and the free end of the flexible connecting member is connected to the lower fixing member. The arrangement of the lifting connecting member, the upper fixing member, and the lower fixing member makes the connection between the flexible connecting member and the compartment body and the activity floor more stable.

[0012] Preferably, the roof lifting mechanism further comprises a guide sleeve and a guide rod, the guide sleeve is fixedly connected with the compartment body, the guide rod is slidably arranged in the guide sleeve, the lower end of the guide rod is connected with the second hydraulic cylinder, and the upper end of the guide rod is connected with the lifting roof.

[0013] Preferably, the roof lifting mechanism further comprises a guide sleeve and a guide rod, the guide sleeve is fixedly connected with the compartment body, the guide rod is slidably arranged in the guide sleeve, the lower end of the guide rod is connected with the second hydraulic cylinder, and the upper end of the guide rod is connected with the lifting roof.

[0014] In another aspect, the utility model also provides a vehicle comprising the double-layer chassis compartment.

[0015] Compared with the prior art, the technical scheme has at least one of the following beneficial effects: by adopting the dynamic pulley power-saving system formed by the flexible connecting piece, the fixed pulley assembly and the movable pulley assembly, the force borne by the first hydraulic cylinder is halved, a large-diameter oil cylinder is not needed, space is saved, cost is reduced, and the service life of the oil cylinder is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of the double-layer chassis compartment of an embodiment of the utility model;

[0017] Figure 2 It is a structure schematic view of the double-layer chassis compartment of an embodiment of the utility model; Figure 1 It is an enlarged view of A in the middle;

[0018] Figure 3 It is a top view of the double-layer chassis compartment of an embodiment of the utility model;

[0019] Figure 4 It is a structure schematic view of the double-layer chassis compartment of an embodiment of the utility model; Figure 3 It is a sectional view along line B-B in the middle;

[0020] Figure 5 It is a sectional view along line C-C in the middle; Figure 3 It is a sectional view along line C-C in the middle;

[0021] Figure 6 It is a partial structure schematic view of the lifting driving mechanism, the second-layer fixing assembly and the guide assembly of an embodiment of the utility model;

[0022] Figure 7 It is a structure schematic view of the second-layer fixing assembly of an embodiment of the utility model;

[0023] Figure 8Another state diagram (the lifting roof is raised) of the carriage with the double-layer chassis according to an embodiment of the utility model;

[0024] In the figure, 1, the carriage body; 11, fixed bottom plate; 12, front upright column; 13, rear upright column; 14, middle upright column; 2, movable bottom plate; 3, lifting drive mechanism; 31, first hydraulic cylinder; 32, flexible connecting piece; 33, fixed pulley assembly; 331, fixed seat; 332, fixed rotating shaft; 333, fixed pulley; 34, movable pulley assembly; 341, connecting plate; 342, lower connecting shaft; 343, upper connecting shaft; 344, movable pulley; 35, lifting connecting piece; 36, upper fixing piece; 37, lower fixing piece; 4, two-layer fixing assembly; 41, upper layer positioning groove; 42, lower layer positioning groove; 43, fixed pin shaft; 44, fixing piece; 441, fixed sleeve; 442, fixed plate; 5, guide assembly; 51, guide rail; 52, sliding block; 6, roof lifting mechanism; 61, lifting roof; 62, second hydraulic cylinder; 63, guide sleeve; 64, guide rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] Please refer to Figures 1 to 8 The embodiment of the application provides a carriage with a double-layer chassis, which comprises a carriage body 1, a movable bottom plate 2 and a lifting drive mechanism 3 for driving the movable bottom plate 2 to move up and down in the carriage body 1.

[0027] The carriage body 1 comprises a fixed bottom plate 11, front upright columns 12, rear upright columns 13 and middle upright columns 14, the fixed bottom plate 11 is provided with the front upright columns 12 on both sides of the front end, the fixed bottom plate 11 is provided with the rear upright columns 13 on both sides of the rear end, and the middle upright columns 14 are located between the front upright columns 12 and the rear upright columns 13.

[0028] The lifting drive mechanism 3 is arranged on the front upright columns 12 and the rear upright columns 13, please refer to Figure 2 The lifting drive mechanism 3 comprises a first hydraulic cylinder 31, a flexible connecting piece 32, a fixed pulley assembly 33 and a movable pulley assembly 34. The flexible connecting piece 32, the fixed pulley assembly 33 and the movable pulley assembly 34 form a movable pulley labor-saving system.

[0029] The movable pulley assembly 34 comprises two connecting plates 341, a lower connecting shaft 342, an upper connecting shaft 343 and a movable pulley 344. The connecting plates 341 are provided in two, and the lower connecting shaft 342 and the upper connecting shaft 343 are connected with the two connecting plates 341. The lower connecting shaft 342 is connected with the output end of the first hydraulic cylinder 31, and the upper connecting shaft 343 is rotatably connected with the two connecting plates 341 through bearings. The movable pulley 344 is fixedly installed on the upper connecting shaft 343.

[0030] The fixed pulley assembly 33 comprises a fixed seat 331, a fixed rotating shaft 332 and a fixed pulley 333. The fixed seat 331 is fixedly connected with the compartment body 1, the fixed rotating shaft 332 is rotatably connected with the fixed seat 331 through a bearing, and the fixed pulley 333 is fixedly installed on the fixed rotating shaft 332.

[0031] The mounting end of the first hydraulic cylinder 31 and the mounting end of the fixed pulley assembly 33 are fixedly connected with the compartment body 1, and the mounting end of the movable pulley assembly 34 is connected with the output end of the first hydraulic cylinder 31.

[0032] One end of the flexible connecting piece 32 is a fixed end, and the other end is a free end. The fixed end of the flexible connecting piece 32 is connected with the compartment body 1, and the free end of the flexible connecting piece 32 is sequentially connected with the movable bottom plate 2 after passing through the movable pulley assembly 34 and the fixed pulley assembly 33. The upper dead point of the movable pulley assembly 34 is lower than the bottom end of the fixed pulley assembly 33 and the fixed end of the flexible connecting piece 32.

[0033] When the first hydraulic cylinder 31 works, the movable pulley assembly 34 is pushed to ascend and descend, and the movable bottom plate 2 is driven to ascend and descend through the flexible connecting piece 32. When the movable pulley assembly 34 ascends, the movable bottom plate 2 descends. When the movable pulley assembly 34 descends, the movable bottom plate 2 ascends.

[0034] In a preferred embodiment, in order to position and fix the movable bottom plate 2 and ensure its stability and reliability during transportation, a two-layer fixing assembly 4 is further provided. Please refer to Figure 2 、 Figures 5 to 7 The two-layer fixing assembly 4 comprises an upper positioning groove 41, a lower positioning groove 42, a fixed pin shaft 43 and a fixing piece 44. The upper positioning groove 41 and the lower positioning groove 42 are fixedly connected with the compartment body 1. Pin holes for inserting the fixed pin shaft 43 are formed in the upper positioning groove 41 and the lower positioning groove 42. The fixing piece 44 comprises a fixed sleeve 441 and a fixed plate 442. The fixed sleeve 441 is located between the upper positioning groove 41 and the lower positioning groove 42 and is sleeved on the fixed pin shaft 43. The fixed plate 442 is fixedly connected with the fixed sleeve 441.

[0035] The fixed plate 442 is coincident with the vertical projection of the movable bottom plate 2, and can be in contact with the upper end of the fixed plate 442 when the movable bottom plate 2 descends to the fixed plate 442, so as to be supported by the fixed plate 442.

[0036] The upper positioning slot 41 and the lower positioning slot 42 do not coincide with the vertical projection of the movable floor 2. When the movable floor 2 needs to pass through the second floor fixing assembly 4, the fixing pin shaft 43 and the fixing member 44 can be removed to avoid the interference between the fixing member 44 and the movable floor 2, so as to facilitate the passing of the movable floor 2. When the movable floor 2 is lifted to the upper side of the second floor fixing assembly 4, the fixing pin shaft 43 and the fixing member 44 can be installed again. Specifically, the fixing sleeve 441 is moved to between the upper positioning slot 41 and the lower positioning slot 42, then the lower end of the fixing pin shaft 43 is inserted through the upper positioning slot 41, the fixing sleeve 441 and the lower positioning slot 42 in sequence, and finally the split pin is installed at the lower end of the fixing pin shaft 43 to fix the fixing pin shaft 43.

[0037] When carrying goods, the lifting driving mechanism 3 drives the movable floor 2 to descend to the fixed plate 442, and the movable floor 2 is supported by the fixed plate 442. The setting of the second floor fixing assembly 4 ensures the stability of the movable floor 2 during transportation. The second floor fixing assembly 4 is arranged on the front upright column 12, the rear upright column 13 and the middle upright column 14, which can replace the lifting driving mechanism 3 to stably support the movable floor 2 when the lifting driving mechanism 3 does not support the movable floor 2.

[0038] In a preferred embodiment, in order to ensure that the movable floor 2 keeps stable and linear lifting motion when the lifting driving mechanism 3 drives the movable floor 2 to lift, please refer to Figure 2 and Figure 6 A guide assembly 5 is also arranged, which includes a guide rail 51 and a sliding block 52. The guide rail 51 is fixedly connected with the compartment body 1, the sliding block 52 is slidingly connected with the guide rail 51, and the sliding block 52 is fixedly connected with the movable floor 2. The guide assembly 5 is arranged on the front upright column 12 and the rear upright column 13. During the lifting of the movable floor 2, the sliding block 52 slides along the guide rail 51 to play a guiding role, so as to ensure the stable lifting of the movable floor 2.

[0039] In a preferred embodiment, in order to stably connect the fixed end of the flexible connecting piece 32 with the compartment body 1 and stably connect the free end of the flexible connecting piece 32 with the movable floor 2, please refer to Figure 2 and Figure 6The setting of the lifting driving mechanism 3 further comprises a lifting connecting piece 35, an upper fixing piece 36 and a lower fixing piece 37, the upper fixing piece 36 is fixedly connected with the compartment body 1, the fixed end of the flexible connecting piece 32 is connected with the upper fixing piece 36, the lower fixing piece 37 is fixedly connected with the lifting connecting piece 35, the lifting connecting piece 35 is fixedly connected with the movable bottom plate 2, and the free end of the flexible connecting piece 32 is connected with the lower fixing piece 37. The fixed end of the flexible connecting piece 32 is connected with the upper fixing piece 36, so that the stable connection with the compartment body 1 is realized. The fixed end of the lower fixing piece 37 is fixedly connected with the lifting connecting piece 35, and the free end of the flexible connecting piece 32 is stably connected with the movable bottom plate 2 through the lower fixing piece 37 and the lifting connecting piece 35. The sliding block 52 can be fixedly connected with the lifting connecting piece 35, so that the fixed connection with the movable bottom plate 2 is realized.

[0040] In a preferred embodiment, referring to Figure 1 、 Figures 3 to 5 , and Figure 8 , a roof lifting mechanism 6 is further arranged, the roof lifting mechanism 6 comprises a lifting roof 61 and a second hydraulic cylinder 62, the mounting end of the second hydraulic cylinder 62 is fixedly connected with the compartment body 1, the lifting roof 61 is slidably connected with the compartment body 1, the output end of the second hydraulic cylinder 62 is connected with the lifting roof 61, and the second hydraulic cylinder 62 drives the lifting roof 61 to lift. The roof lifting mechanism 6 cooperates with the movable bottom plate 2, so that the loading requirements of goods of different heights on the movable bottom plate 2 can be met, the utilization rate of the internal space of the compartment is greatly improved, and the diversified requirements of efficient loading and unloading and goods transportation are realized.

[0041] In order to enable the second hydraulic cylinder 62 to drive the lifting roof 61 to stably and linearly lift, the setting of the roof lifting mechanism 6 further comprises a guide sleeve 63 and a guide rod 64, the guide sleeve 63 is fixedly connected with the compartment body 1, the guide rod 64 is slidably arranged in the guide sleeve 63, the lower end of the guide rod 64 is connected with the second hydraulic cylinder 62, and the upper end of the guide rod 64 is connected with the lifting roof 61.

[0042] When the height of the goods on the movable bottom plate 2 is high, the second hydraulic cylinder 62 works, pushes the guide rod 64 to ascend, drives the lifting roof 61 to ascend, and provides sufficient space for the goods; on the contrary, when the height of the goods on the movable bottom plate 2 is low, the second hydraulic cylinder 62 drives the lifting roof 61 to descend, and when the lifting roof 61 descends to a lower limit point, the lower end of the lifting roof 61 abuts against the top end of the compartment body 1, so that the height of the lifting roof 61 is reduced, and the space is reasonably utilized.

[0043] The vehicle disclosed by the utility model comprises the compartment with the double-layer chassis according to any one of the above technical solutions, adopts all the technical solutions of the above all embodiments, and thus at least has all the beneficial effects brought by the technical solutions of the above embodiments. The vehicle can be a van, a logistics transportation special vehicle, a cold chain transportation vehicle, a special transportation vehicle such as a medical instrument transportation vehicle, etc.

[0044] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in a contradiction.

[0045] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0048] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A carriage with a double-layer chassis, comprising a carriage body (1), a movable floor plate (2), and a lifting drive mechanism (3) for driving the movable floor plate (2) to move up and down within the carriage body (1), characterized in that, The lifting drive mechanism (3) includes a first hydraulic cylinder (31), a flexible connector (32), a fixed pulley assembly (33), and a movable pulley assembly (34). The mounting ends of the first hydraulic cylinder (31) and the fixed pulley assembly (33) are fixedly connected to the body (1). The mounting end of the movable pulley assembly (34) is connected to the output end of the first hydraulic cylinder (31). The fixed end of the flexible connector (32) is connected to the body (1). The free end of the flexible connector (32) passes around the movable pulley assembly (34) and the fixed pulley assembly (33) in sequence and is connected to the movable base plate (2). The upper stop point of the movable pulley assembly (34) is lower than the bottom end of the fixed pulley assembly (33) and the fixed end of the flexible connector (32).

2. The carriage with a double-layer chassis according to claim 1, characterized in that, It also includes a second-layer fixing component (4), which includes an upper positioning groove (41), a lower positioning groove (42), a fixing pin (43), and a fixing component (44). The upper positioning groove (41) and the lower positioning groove (42) are both fixedly connected to the body (1). The upper positioning groove (41) and the lower positioning groove (42) are both provided with pin holes for insertion into the fixing pin (43). The fixing component (44) includes a fixing sleeve (441) and a fixing plate (442). The fixing sleeve (441) is located between the upper positioning groove (41) and the lower positioning groove (42) and is fitted onto the fixing pin (43). The fixing plate (442) is fixedly connected to the fixing sleeve (441). The vertical projection of the fixing plate (442) coincides with that of the movable base plate (2). The vertical projections of the upper positioning groove (41) and the lower positioning groove (42) do not coincide with those of the movable base plate (2).

3. The carriage with a double-layer chassis according to claim 2, characterized in that, The body (1) includes a fixed base plate (11), a front column (12), a rear column (13) and a middle column (14). The front base plate (11) is provided with front columns (12) on both sides of the front end, and the rear base plate (11) is provided with rear columns (13) on both sides of the rear end. The middle column (14) is located between the front column (12) and the rear column (13). The front column (12) and the rear column (13) are provided with lifting drive mechanisms (3). The front column (12), the rear column (13) and the middle column (14) are provided with two layers of fixing components (4).

4. The carriage with a double-layer chassis according to claim 1, characterized in that, It also includes a guide assembly (5), which includes a guide rail (51) and a slider (52). The guide rail (51) is fixedly connected to the body (1), the slider (52) is slidably connected to the guide rail (51), and the slider (52) is fixedly connected to the movable base plate (2).

5. The carriage with a double-layer chassis according to claim 1, characterized in that, The movable pulley assembly (34) includes a connecting plate (341), a lower connecting shaft (342), an upper connecting shaft (343), and a movable pulley (344). There are two connecting plates (341). The lower connecting shaft (342) and the upper rotating shaft are both connected to the two connecting plates (341). The lower connecting shaft (342) is connected to the output end of the first hydraulic cylinder (31). The upper rotating shaft is rotatably connected to the two connecting plates (341). The movable pulley (344) is fixedly installed on the upper rotating shaft.

6. The carriage with a double-layer chassis according to claim 1, characterized in that, The fixed pulley assembly (33) includes a fixed seat (331), a fixed rotating shaft (332) and a fixed pulley (333). The fixed seat (331) is fixedly connected to the box body (1), the fixed rotating shaft (332) is rotatably connected to the fixed seat (331), and the fixed pulley (333) is fixedly installed on the fixed rotating shaft (332).

7. The carriage with a double-layer chassis according to claim 1, characterized in that, The lifting drive mechanism (3) further includes a lifting connector (35), an upper fixing member (36) and a lower fixing member (37). The upper fixing member (36) is fixedly connected to the body (1). The fixed end of the flexible connector (32) is connected to the upper fixing member (36). The lower fixing member (37) is fixedly connected to the lifting connector (35). The lifting connector (35) is fixedly connected to the movable base plate (2). The free end of the flexible connector (32) is connected to the lower fixing member (37).

8. The carriage with a double-layer chassis according to claim 1, characterized in that, It also includes a roof lifting mechanism (6), which includes a lifting roof (61) and a second hydraulic cylinder (62). The mounting end of the second hydraulic cylinder (62) is fixedly connected to the body (1), the lifting roof (61) is slidably connected to the body (1), the output end of the second hydraulic cylinder (62) is connected to the lifting roof (61), and the second hydraulic cylinder (62) drives the lifting roof (61) to lift.

9. The carriage with a double-layer chassis according to claim 8, characterized in that, The roof lifting mechanism (6) also includes a guide sleeve (63) and a guide rod (64). The guide sleeve (63) is fixedly connected to the box body (1). The guide rod (64) is slidably installed inside the guide sleeve (63). The lower end of the guide rod (64) is connected to the second hydraulic cylinder (62), and the upper end of the guide rod (64) is connected to the lifting roof (61).

10. A vehicle, characterized in that, The carriage includes the double-layer chassis as described in any one of claims 1 to 9.

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